Compressor

Abstract

This compressor may comprise: a lower cylinder and an upper cylinder each including a compression chamber configured to compress a refrigerant and discharge the compressed refrigerant; a lower muffler disposed below the lower cylinder and configured to receive the refrigerant discharged from the lower cylinder, reduce noise of the refrigerant, and discharge the refrigerant to an accommodation space; and a separation muffler disposed above the upper cylinder and configured to receive the refrigerant discharged from the compression chamber of the upper cylinder, reduce noise of the refrigerant, and discharge the refrigerant to the accommodation space. The separation muffler extends upward from the lower muffler and is partitioned from a flow path along which the refrigerant discharged from the lower muffler flows, so that the refrigerant discharged from the lower muffler can flow along the flow path before reaching the accommodation space and can be partitioned from the refrigerant discharged from the separation muffler.

Description

compressor

[0001] The present disclosure relates to a compressor.

[0002] A compressor is a mechanical device that receives power from a power-generating device, such as an electric motor or turbine, to compress air, refrigerant, or other working gases, thereby increasing their pressure. Compressors are widely used in home appliances such as refrigerators, air conditioners, and clothes dryers, as well as across various industries.

[0003] There are various types of compressors, including reciprocating compressors, scroll compressors, and rotary compressors. A reciprocating compressor compresses the working gas by forming a compression space between the piston and the cylinder, where the working gas is sucked in and discharged, and the piston moves back and forth in a straight line inside the cylinder. A scroll compressor compresses the working gas by forming a compression space between an orbiting scroll and a fixed scroll, where the working gas is sucked in and discharged, and the orbiting scroll rotates along the fixed scroll. A rotary compressor compresses the working gas by forming a compression space between an eccentrically rotating rolling piston and the cylinder, where the working gas is sucked in and discharged, and the rolling piston rotates eccentrically along the inner wall of the cylinder.

[0004] The compressor includes a compression unit where refrigerant compression is performed and a drive unit that provides power for refrigerant compression. The compression unit may be equipped with a muffler to reduce noise generated when the compressed refrigerant is discharged.

[0005] One aspect of the present disclosure provides a compressor having an improved structure such that discharge paths of compressed refrigerant in each of the upper cylinder and the lower cylinder are separated.

[0006] One aspect of the present disclosure provides a compressor having an improved structure to prevent pressure drop due to flow interference between refrigerant discharged from an upper cylinder and refrigerant discharged from a lower cylinder.

[0007] One aspect of the present disclosure provides a compressor having an improved structure to prevent a portion of the discharged refrigerant from flowing backward.

[0008] The technical problems to be achieved in this document are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0009] According to the present disclosure, a compressor may include a lower cylinder including a lower compression chamber, wherein the lower compression chamber is configured such that refrigerant is compressed within the lower compression chamber and the compressed refrigerant within the lower compression chamber is discharged from the lower compression chamber, an upper cylinder including an upper compression chamber, wherein the upper compression chamber is configured such that refrigerant is compressed within the upper compression chamber and the compressed refrigerant within the upper compression chamber is discharged from the upper compression chamber, a lower muffler disposed below the lower compression chamber and configured to transmit refrigerant discharged from the lower compression chamber and reduce noise of the refrigerant, and configured to discharge the refrigerant transmitted from the lower compression chamber and the reduced noise into a receiving space of the compressor, and a separation muffler disposed above the upper compression chamber and configured such that refrigerant discharged from the upper compression chamber is transmitted and the reduced noise of the refrigerant is discharged from the upper compression chamber and the reduced noise is discharged into the receiving space. The above separation muffler is defined by a passage extending upward from the lower muffler and along which refrigerant discharged from the lower muffler flows, so that the refrigerant discharged from the lower muffler can flow along the passage and be defined from the refrigerant discharged from the separation muffler before reaching the receiving space.

[0010] The above compressor may further include a connecting muffler connected to the interior of the lower muffler and separated from the separating muffler.

[0011] The above-described separating muffler may include a first discharge hole through which refrigerant is discharged from the separating muffler into the receiving space. The above-described connecting muffler may include a second discharge hole through which refrigerant is discharged from the connecting muffler into the receiving space. The flow path may extend from the lower muffler through the interior of the connecting muffler to the second discharge hole.

[0012] The compressor may further include a rotating shaft, a lower roller disposed within the lower cylinder and configured to rotate by rotation of the rotating shaft to compress refrigerant within the lower compression chamber and discharge the compressed refrigerant within the lower compression chamber, and an upper roller disposed within the upper cylinder and configured to rotate by rotation of the rotating shaft to compress refrigerant within the upper compression chamber and discharge the compressed refrigerant within the upper compression chamber. A distance between the rotating shaft and the first discharge hole may be shorter than a distance between the rotating shaft and the second discharge hole.

[0013] The compressor may further include a rotating shaft, a lower roller disposed within the lower cylinder and configured to rotate by rotation of the rotating shaft to compress refrigerant within the lower compression chamber and discharge the compressed refrigerant within the lower compression chamber, and an upper roller disposed within the upper cylinder and configured to rotate by rotation of the rotating shaft to compress refrigerant within the upper compression chamber and discharge the compressed refrigerant within the upper compression chamber. A distance between the rotating shaft and the first discharge hole may be longer than a distance between the rotating shaft and the second discharge hole.

[0014] The first discharge hole may be configured to allow refrigerant from the separation muffler to be discharged upward through the first discharge hole. The second discharge hole may be configured to allow refrigerant from the connection muffler to be discharged upward through the second discharge hole.

[0015] The first discharge hole may be configured such that the refrigerant from the separation muffler is discharged in a first direction inclined at a predetermined first angle with respect to the horizontal direction through the first discharge hole. The second discharge hole may be configured such that the refrigerant from the connection muffler is discharged in a second direction inclined at a predetermined second angle with respect to the horizontal direction through the second discharge hole.

[0016] The compressor may further include a connecting hole through which refrigerant from the lower muffler flows along the flow path from the lower muffler and into the connecting muffler. The connecting hole and the second discharge hole may be arranged to be spaced apart from each other in the horizontal direction.

[0017] The above-mentioned euro can extend through the space between the above-mentioned separating muffler and the above-mentioned connecting muffler.

[0018] The above separation muffler and the above connection muffler can be combined with each other.

[0019] The compressor may further include an upper cylinder cover that covers the upper side of the upper cylinder and includes an upper inlet hole through which the refrigerant compressed within the upper compression chamber is discharged to the separating muffler. The separating muffler may include an exhaust hole through which the refrigerant delivered from the upper compression chamber and having reduced noise is discharged. The upper inlet hole and the exhaust hole may be arranged to be spaced apart from each other in the horizontal direction.

[0020] The compressor may further include a discharge pipe configured to extend the refrigerant and discharge the refrigerant upward from the lower muffler.

[0021] The compressor may further include an upper cylinder cover disposed above the upper compression chamber and including an upper cover hole. The discharge pipe may extend upward from the upper cover hole.

[0022] The above discharge pipe can pass through the above separation muffler.

[0023] The above-mentioned receiving space may be located above the above-mentioned separating muffler. The above-mentioned separating muffler may include a discharge hole through which refrigerant delivered from the upper compression chamber and having reduced noise is discharged into the receiving space. The refrigerant discharged through the discharge hole and the refrigerant discharged along the flow path from the lower muffler may be configured to mix in the receiving space.

[0024] According to one embodiment of the present disclosure, a compressor may include a lower cylinder including a lower compression chamber provided to compress refrigerant therein, an upper cylinder including an upper compression chamber provided to compress refrigerant therein, a lower muffler provided to reduce noise of refrigerant discharged from the lower compression chamber and disposed on a lower side of the lower cylinder, and an upper muffler provided to reduce noise of refrigerant discharged from the lower compression chamber, and an upper muffler provided on an upper side of the upper cylinder. The upper muffler may include a separation muffler provided to reduce noise of refrigerant discharged from the upper compression chamber, and a connection muffler connected to the lower muffler and partitioned from the separation muffler.

[0025] According to one embodiment of the present disclosure, a compressor may include a lower cylinder including a lower compression chamber provided to compress refrigerant therein, an upper cylinder including an upper compression chamber provided to compress refrigerant therein, a lower muffler provided to reduce noise of refrigerant discharged from the lower compression chamber and disposed on a lower side of the lower cylinder, a discharge pipe provided to discharge refrigerant in the lower muffler upward, and an upper muffler provided on an upper side of the upper cylinder, wherein the upper muffler is provided to reduce noise of refrigerant discharged from the upper compression chamber and is partitioned from the discharge pipe.

[0026] FIG. 1 is a schematic drawing of an air conditioner including a compressor according to one embodiment of the present disclosure.

[0027] FIG. 2 is a cross-sectional view illustrating a compressor and an accumulator according to one embodiment of the present disclosure.

[0028] FIG. 3 is a drawing showing an exploded top view of some components of a compressor, such as a rotating shaft, a cylinder, a roller, a cylinder cover, and a muffler, according to one embodiment of the present disclosure.

[0029] FIG. 4 is a drawing showing a view from below of some components of a compressor, such as a rotating shaft, a cylinder, a roller, a cylinder cover, and a muffler, according to one embodiment of the present disclosure.

[0030] FIG. 5 is a cross-sectional view showing some components of a compressor, such as a rotating shaft, a cylinder, a roller, a cylinder cover, and a muffler, cut away according to one embodiment of the present disclosure.

[0031] FIG. 6 is a drawing illustrating a state in which refrigerant in an upper compression chamber of a compressor according to one embodiment of the present disclosure flows through an upper cylinder cover.

[0032] FIG. 7 is a perspective view illustrating some components of a compressor according to one embodiment of the present disclosure, such as a rotating shaft, an upper cylinder, a lower cylinder, an upper cylinder cover, a lower cylinder cover, a separation muffler, a connecting muffler, and a lower muffler.

[0033] FIG. 8 is a drawing illustrating a state in which refrigerant in an upper compression chamber of a compressor according to one embodiment of the present disclosure flows into a separate muffler chamber and is discharged through a first discharge hole.

[0034] FIG. 9 is a drawing illustrating a state in which refrigerant from a lower muffler chamber of a compressor according to one embodiment of the present disclosure flows into a connecting muffler chamber and is discharged through a second discharge hole.

[0035] FIG. 10 is a perspective view illustrating some components of a compressor according to one embodiment of the present disclosure, such as a rotating shaft, an upper cylinder, a lower cylinder, an upper cylinder cover, a lower cylinder cover, a separation muffler, a connecting muffler, and a lower muffler.

[0036] FIG. 11 is a drawing illustrating a state in which refrigerant in an upper compression chamber of a compressor according to one embodiment of the present disclosure flows into a separate muffler chamber and is discharged through a first discharge hole.

[0037] FIG. 12 is a drawing illustrating a state in which refrigerant from a lower muffler chamber of a compressor according to one embodiment of the present disclosure flows into a connecting muffler chamber and is discharged through a second discharge hole.

[0038] FIG. 13 is a perspective view illustrating some components of a compressor according to one embodiment of the present disclosure, such as a rotating shaft, an upper cylinder, a lower cylinder, an upper cylinder cover, a lower cylinder cover, an upper muffler, a lower muffler, and a discharge pipe.

[0039] FIG. 14 is a cross-sectional perspective view illustrating a state in which refrigerant in an upper compression chamber of a compressor according to one embodiment of the present disclosure is discharged through an upper muffler chamber and a discharge hole, and refrigerant in a lower muffler chamber is discharged through a connecting passage and a discharge pipe.

[0040] FIG. 15 is a cross-sectional perspective view illustrating a state in which refrigerant in an upper compression chamber of a compressor according to one embodiment of the present disclosure is discharged through an upper muffler chamber and a discharge hole, and refrigerant in a lower muffler chamber is discharged through a connecting passage and a discharge pipe.

[0041] FIG. 16 is a perspective view illustrating some components of a compressor according to one embodiment of the present disclosure, such as a rotating shaft, an upper cylinder, a lower cylinder, an upper cylinder cover, a lower cylinder cover, a separation muffler, a connecting muffler, and a lower muffler.

[0042] FIG. 17 is a drawing illustrating a state in which refrigerant from a lower muffler chamber of a compressor according to one embodiment of the present disclosure flows into a connecting muffler chamber and is discharged through a second discharge hole.

[0043] FIG. 18 is a drawing illustrating a state in which refrigerant in an upper compression chamber of a compressor according to one embodiment of the present disclosure flows into a separate muffler chamber and is discharged through a first discharge hole.

[0044] It should be understood that the various embodiments and terms used in this document are not intended to limit the technical features described in this document to specific embodiments, but rather to include various modifications, equivalents, or substitutes of the embodiments.

[0045] In connection with the description of the drawings, similar reference numerals may be used for similar or related components.

[0046] The singular form of a noun corresponding to an item may include one or more of said items, unless the relevant context clearly indicates otherwise.

[0047] In this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" may include any one of the items listed together in that phrase, or all possible combinations thereof.

[0048] The term “and / or” includes any combination of a plurality of related described elements or any one of a plurality of related described elements.

[0049] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish one component from another and do not qualify the components in any other respect (e.g., importance or order).

[0050] The terms “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in this document, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0051] When a component is said to be “connected,” “coupled,” “supported,” or “in contact with” another component, this includes not only cases where the components are directly connected, coupled, supported, or in contact, but also cases where the components are indirectly connected, coupled, supported, or in contact through a third component.

[0052] When we say that a component is "on" another component, this includes not only cases where the component is in contact with the other component, but also cases where there is another component between the two components.

[0053] The terms “upper side,” “lower side,” “horizontal direction,” etc. used in the description below are defined based on the drawing, and the shape and position of each component are not limited by these terms.

[0054] Among the expressions used in the description below, “upper~”, “lower~”, etc. can be used to distinguish components by considering the relative positions between the components, and these expressions can be replaced with expressions such as “first~”, “second~”.

[0055] Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings.

[0056] FIG. 1 is a schematic drawing of an air conditioner including a compressor according to one embodiment of the present disclosure.

[0057] Referring to FIG. 1, a compressor (11) according to one embodiment of the present disclosure may be included in an air conditioner (1).

[0058] An air conditioner (1) can absorb heat from indoors and release heat to the outdoors for cooling the space to be air-conditioned, i.e., the room. In addition, the air conditioner (1) can absorb heat from outdoors and release heat to the indoors for heating the room. The air conditioner (1) can include an outdoor unit (10) configured to exchange heat with outdoor air and an indoor unit (20) configured to exchange heat with indoor air. For example, the outdoor unit (10) can be installed in an outdoor space and exchange heat with outdoor air, and the indoor unit (20) can be installed in an indoor space and exchange heat with indoor air.

[0059] An air conditioner (1) according to one embodiment may be a separate air conditioner in which the outdoor unit (10) and the indoor unit (20) are installed separately from each other. Alternatively, the air conditioner (1) according to one embodiment may be an integrated air conditioner in which the outdoor unit (10) and the indoor unit (20) are installed together in one cabinet.

[0060] The outdoor unit (10) can perform heat exchange between the refrigerant and outdoor air by utilizing the phase change of the refrigerant (e.g., evaporation or condensation). For example, the outdoor unit (10) can release heat from the refrigerant to the outdoor air by utilizing condensation of the refrigerant. Additionally, the outdoor unit (10) can absorb heat from the outdoor air into the refrigerant by utilizing evaporation of the refrigerant.

[0061] The outdoor unit (10) may include a compressor (11) configured to compress refrigerant gas and an outdoor heat exchanger (12) configured to exchange heat between outdoor air and refrigerant.

[0062] The indoor unit (20) can perform heat exchange between the refrigerant and indoor air by utilizing the phase change (e.g., evaporation or condensation) of the refrigerant. For example, the indoor unit (20) can cool an indoor space by absorbing heat from the indoor air into the refrigerant through evaporation. Furthermore, the indoor unit (20) can heat an indoor space by releasing heat from the refrigerant into the indoor air through condensation of the refrigerant.

[0063] The indoor unit (20) may include an indoor heat exchanger (22) configured to exchange heat between indoor air and a refrigerant.

[0064] As illustrated in Fig. 1, the air conditioner (1) may include a refrigerant circulation circuit for transferring heat between the outdoor unit (10) and the indoor unit (20) using a refrigerant.

[0065] The refrigerant circulation circuit may include a compressor (11), an outdoor heat exchanger (12), an expansion device (13), and an indoor heat exchanger (22). The refrigerant may circulate in the order of the compressor (11), the outdoor heat exchanger (12), the expansion device (13), and the indoor heat exchanger (22), or in the order of the compressor (11), the indoor heat exchanger (22), the expansion device (13), and the outdoor heat exchanger (12).

[0066] The compressor (11) can compress refrigerant gas and discharge the refrigerant gas at high temperature and high pressure. For example, the compressor (11) may include a motor and a compression mechanism, and the compression mechanism can compress the refrigerant gas by the torque of the motor. The detailed structure of the compressor (11) will be described later.

[0067] The outdoor heat exchanger (12) can exchange heat between the refrigerant and the outdoor air. For example, during cooling operation, the outdoor heat exchanger (12) condenses high-pressure, high-temperature refrigerant gas, and while the refrigerant is condensing, the refrigerant can release heat to the indoor air. During cooling operation, the outdoor heat exchanger (12) can discharge refrigerant liquid. Additionally, during heating operation, the outdoor heat exchanger (12) evaporates low-temperature refrigerant liquid, and while the refrigerant is evaporating, the refrigerant can absorb heat from the indoor air. During heating operation, the outdoor heat exchanger (12) can discharge refrigerant gas.

[0068] An outdoor fan (16) may be provided near the outdoor heat exchanger (12). The outdoor fan (16) may blow outdoor air to the outdoor heat exchanger (12) to promote heat exchange between the refrigerant and the outdoor air.

[0069] The expansion device (13) can expand high-temperature, high-pressure refrigerant liquid, for example, by utilizing the throttling effect. In addition, the expansion device (13) can discharge low-temperature, low-pressure refrigerant liquid. The expansion device (13) can include an orifice capable of reducing the cross-sectional area of ​​the flow path.

[0070] The expansion device (13) can be connected to the indoor unit (20). The number of expansion devices (13) can be provided corresponding to the number of indoor units (20).

[0071] In the indoor heat exchanger (22), heat exchange can occur between the refrigerant and indoor air. For example, during cooling operation, the indoor heat exchanger (22) evaporates low-pressure, low-temperature refrigerant liquid, and while the refrigerant evaporates, the refrigerant can absorb heat from the indoor air. As a result, the indoor space can be cooled. During cooling operation, the indoor heat exchanger (22) can discharge refrigerant gas. In addition, during heating operation, the indoor heat exchanger (22) condenses high-temperature, high-pressure refrigerant gas, and while the refrigerant condenses, the refrigerant can release heat to the indoor air. As a result, the indoor space can be heated. During heating operation, the indoor heat exchanger (22) can discharge refrigerant liquid.

[0072] Depending on the embodiment, a separate expansion device (not shown) or capillary tube (not shown) may be provided on the inlet side of the indoor heat exchanger (22). The separate expansion valve or capillary tube can expand the refrigerant liquid and provide the low-temperature, low-pressure refrigerant liquid to the indoor heat exchanger (22).

[0073] An indoor fan (26) may be provided near the indoor heat exchanger (22). The indoor fan (26) may blow indoor air to the indoor heat exchanger (22) to promote heat exchange between the refrigerant and the outdoor air.

[0074] Additionally, the refrigerant circulation circuit may further include a flow diverter valve (14). The flow diverter valve (14) may include, for example, a 4-way valve. The flow diverter valve (14) may be connected to the refrigerant outlet of the compressor (11).

[0075] The flow switching valve (14) can switch the circulation path of the refrigerant depending on the operating mode (e.g., cooling operation or heating operation) of the air conditioner (1). For example, during the cooling operation of the air conditioner (1), the flow switching valve (14) can guide the refrigerant gas discharged from the compressor (11) to the outdoor heat exchanger (12), whereby the refrigerant can circulate in the order of the compressor (11), the outdoor heat exchanger (12), the expansion device (13), and the indoor heat exchanger (22). In addition, during the heating operation of the air conditioner (1), the flow switching valve (14) can guide the refrigerant gas discharged from the compressor (11) to the indoor heat exchanger (22), whereby the refrigerant can circulate in the order of the compressor (11), the indoor heat exchanger (22), the expansion device (13), and the outdoor heat exchanger (12).

[0076] Additionally, the refrigerant circulation circuit may further include an accumulator (15). The accumulator (15) may be connected to the refrigerant inlet of the compressor (11).

[0077] The accumulator (15) may receive low-temperature, low-pressure refrigerant evaporated in the indoor heat exchanger (22) or the outdoor heat exchanger (12). For example, during cooling operation, the accumulator (15) may receive low-temperature, low-pressure refrigerant evaporated in the indoor heat exchanger (22). During heating operation, the accumulator (15) may receive low-temperature, low-pressure refrigerant evaporated in the outdoor heat exchanger (12).

[0078] Depending on the load, the refrigerant may be incompletely evaporated in the indoor heat exchanger (22) or the outdoor heat exchanger (12), and a refrigerant mixed with refrigerant liquid and refrigerant gas may flow into the accumulator (15). When a refrigerant mixed with refrigerant liquid and refrigerant gas flows into the accumulator (15), the accumulator separates the refrigerant liquid from the refrigerant gas, and provides the refrigerant gas from which the refrigerant liquid has been separated to the compressor (11).

[0079] For example, a compressor (11), an outdoor heat exchanger (12), an outdoor fan (16), an expansion device (13), a flow switching valve (14), and an accumulator (15) may be placed in an outdoor unit (10). An indoor heat exchanger (22) and an indoor fan (26) may be placed in an indoor unit (20). However, the location of the expansion device (13) is not limited to the outdoor unit (10), and in various embodiments, the expansion device (13) may be placed in the indoor unit (20).

[0080] Although FIG. 1 illustrates an example in which one outdoor unit (10) and one indoor unit (20) are connected to each other, the present invention is not limited thereto, and one outdoor unit (10) and two or more indoor units (20) may be connected, or two or more outdoor units (10) and one indoor unit (20) may be connected, or two or more outdoor units (10) and two or more indoor units (20) may be connected.

[0081] The air conditioner (1) according to one embodiment described above with reference to FIG. 1 is only an example of a device to which a compressor according to the concept of the present disclosure can be applied, and the concept of the present disclosure is not limited thereto.

[0082] FIG. 2 is a cross-sectional view illustrating a compressor and an accumulator according to one embodiment of the present disclosure.

[0083] Referring to FIG. 2, a compressor (11) according to one embodiment of the present disclosure may include a compression unit (including components such as cylinders (110, 210), rollers (120, 220)) configured to compress refrigerant, a drive motor (40) provided to provide power to the compression unit, and a housing (30) that accommodates the compression unit and the drive motor (40).

[0084] The housing (30) can form the exterior of the compressor (11). An accommodation space (S) in which a compression unit and a driving motor (40) are accommodated can be formed inside the housing (30). Oil can be stored in the inner lower part of the housing (30) to reduce friction between various components of the compressor (11) and to cool the components.

[0085] A compressor inlet pipe (PI) may be connected to the inlet side of the housing (30). The housing (30) may be connected to the accumulator (15) by the compressor inlet pipe (PI). The compressor inlet pipe (PI) may be provided to guide refrigerant flowing from the accumulator (15) into the housing (30). The compressor inlet pipe (PI) may include an upper cylinder inlet pipe (PI1) connected to an upper cylinder (110) described below, and a lower cylinder inlet pipe (PI2) connected to a lower cylinder (210) described below. Some of the refrigerant in the accumulator (15) may flow into an upper compression chamber (111, see FIG. 5) in the upper cylinder (110) through the upper cylinder inlet pipe (PI1). Other of the refrigerant in the accumulator (15) may flow into a lower compression chamber (211, see FIG. 5) in the lower cylinder (210) through the lower cylinder inlet pipe (PI2).

[0086] For example, the compressor inlet pipe (PI) may be connected to the lower part of the housing (30).

[0087] A compressor discharge pipe (PO) may be connected to the discharge side of the housing (30). The compressor discharge pipe (PO) may be provided to guide the refrigerant compressed within the housing (30) to be discharged outside the housing (30). The compressor discharge pipe (P0) may be provided to guide the refrigerant within the receiving space (S) of the housing (30) to be discharged outside the housing (30).

[0088] For example, the compressor discharge pipe (PO) may be connected to the upper part of the housing (30).

[0089] A drive motor (40) can convert electromagnetic force into mechanical rotational force. The drive motor (40) can include a stator (41) fixed to a housing (30) and a rotor (42) having magnetism and capable of rotating relative to the stator (41) by electromagnetic force. The stator (41) can include a core and a coil wound around the core. The rotor (42) can be provided to be rotatable on the inside of the stator (41).

[0090] The compressor (11) may include a rotating shaft (43) configured to transmit power generated from a driving motor (40) to a compression unit. The rotating shaft (43) may be connected to a rotor (42) and configured to provide power to an upper roller (120) and a lower roller (220) to be described later. The rotating shaft (43) may be fixed to the rotor (42) and configured to rotate together with the rotor (42). The rotating shaft (43) may be coupled to the rotor (42) by fitting, press-fitting, or the like.

[0091] The rotary shaft (43) can extend along the vertical direction of the compressor (11). That is, the rotary shaft (43) can extend along the direction of gravity. The direction of the rotation axis of the driving motor (40) and the direction of the rotation axis of each of the upper roller (120) and the lower roller (220) described later can be parallel to the rotary shaft (43).

[0092] The rotating shaft (43) can vertically penetrate each component of the compression section described below, such as, for example, the upper muffler (300), the upper cylinder cover (130), the upper cylinder (110), the upper roller (120), the mid plate (60), the lower cylinder (210), the lower roller (220), the lower cylinder cover (230), and the lower muffler (400).

[0093] The drive motor (40) can be coupled to the housing (30). The stator (41) of the drive motor (40) can be coupled to the inner surface of the housing (30). For example, the stator (41) can be coupled to the inside of the housing (30) by fitting, press-fitting, or the like.

[0094] For example, the drive motor (40) may be placed on the upper side of the compression section.

[0095] The compression section of the compressor (11) may include an upper cylinder (110) including an upper compression chamber (111, see FIG. 5) and a lower cylinder (210) including a lower compression chamber (211, see FIG. 5). The upper compression chamber (111) may be provided inside the upper cylinder (110). The lower compression chamber (211) may be provided inside the lower cylinder (210).

[0096] The upper compression chamber (111) and the lower compression chamber (211) may each be provided to compress the refrigerant. The compression unit may include an upper roller (120) that is provided rotatably on the inside of the upper cylinder (110). The upper roller (120) may be provided to compress the refrigerant in the upper compression chamber (111) as it rotates on the inside of the upper cylinder (110). The compression unit may include a lower roller (220) that is provided rotatably on the inside of the lower cylinder (210). The lower roller (220) may be provided to compress the refrigerant in the lower compression chamber (211) as it rotates on the inside of the lower cylinder (210). The upper roller (120) and the lower roller (220) may each be provided to rotate by receiving power from a rotation shaft (43).

[0097] That is, the compressor (11) according to one embodiment may include a rotary compressor.

[0098] Hereinafter, the configurations related to the compression section among the configurations of the compressor (11) according to one embodiment will be described in more detail with reference to FIGS. 3 to 18.

[0099] FIG. 3 is a diagram illustrating an exploded top view of some components of a compressor, such as a rotating shaft, a cylinder, a roller, a cylinder cover, and a muffler, according to an embodiment of the present disclosure. FIG. 4 is a diagram illustrating an exploded bottom view of some components of a compressor, such as a rotating shaft, a cylinder, a roller, a cylinder cover, and a muffler, according to an embodiment of the present disclosure. FIG. 5 is a longitudinal sectional view illustrating some components of a compressor, such as a rotating shaft, a cylinder, a roller, a cylinder cover, and a muffler, according to an embodiment of the present disclosure. FIG. 6 is a diagram illustrating a state in which refrigerant in an upper compression chamber of a compressor, according to an embodiment of the present disclosure, flows through an upper cylinder cover.

[0100] Referring to FIGS. 3 to 6, a compressor (11) according to one embodiment of the present disclosure may include an upper cylinder (110) including an upper compression chamber (111) and a lower cylinder (210) including a lower compression chamber (211).

[0101] The upper compression chamber (111) may be formed in the inner direction of the circumference of the upper cylinder (110). For example, the upper cylinder (110) may have an approximately ring shape, and the upper compression chamber (111) may be formed in the inner portion of the ring shape of the upper cylinder (110).

[0102] The central axis of the inner space of the upper cylinder (110) may roughly coincide with the rotational axis of the rotary shaft (43) (same as the central axis of the rotary shaft (43)). For example, the upper cylinder (110) may have a ring shape with the rotational axis of the rotary shaft (43) as its central axis.

[0103] The upper cylinder (110) may include an upper refrigerant inlet (112) provided to allow refrigerant to flow into the upper compression chamber (111). The upper refrigerant inlet (112) may be connected to an upper cylinder inlet pipe (PI1). Refrigerant flowing from the accumulator (15) along the upper cylinder inlet pipe (PI1) may flow into the interior of the upper cylinder (110) through the upper refrigerant inlet (112).

[0104] An upper roller (120) may be provided rotatably on the inner side of the upper cylinder (110). The outer diameter of the upper roller (120) may be smaller than the inner diameter of the upper cylinder (110). The upper roller (120) may be rotatably in contact with the inner circumferential surface of the upper cylinder (110).

[0105] The rotation axis of the upper roller (120) may be parallel to the vertical direction of the compressor (11). The rotation axis of the upper roller (120) may be parallel to the direction of gravity. The rotation axis of the upper roller (120) is parallel to the central axis of the rotation shaft (43), but the central axis of the upper roller (120) may be eccentric to one side from the central axis of the rotation shaft (43). The central axis of the upper roller (120) may be eccentric to one side in the radial direction from the central axis of the rotation shaft (43). The central axis of the upper roller (120) may be eccentric to one side in the radial direction from the rotation axis of the upper roller (120).

[0106] In detail, an upper cam (51) that contacts an upper roller (120) may be provided on the outer surface of the rotary shaft (43). The upper cam (51) may contact an inner surface of the upper roller (120) and transmit rotational force to the upper roller (120). The upper cam (51) may be coupled to the upper roller (120). The upper cam (51) may be fixed to the upper roller (120). The upper cam (51) may rotate about the central axis of the rotary shaft (43) when the rotary shaft (43) rotates. At this time, the central axis of the upper cam (51) may be eccentric to one side in the radial direction from the central axis of the rotary shaft (43).

[0107] For example, the upper roller (120) may have a roughly ring shape. The upper cam (51) may be arranged on the inner portion of the ring shape of the upper roller (120). The outer surface of the upper cam (51) may be in contact with the inner surface of the upper roller (120). Almost all of the outer surface of the upper cam (51) may be in contact with almost all of the inner surface of the upper roller (120). The upper cam (51) may be fitted and coupled to the inner surface of the upper roller (120).

[0108] In this way, since the upper cam (51) is arranged eccentrically with respect to the central axis of the rotary shaft (43), the upper roller (120) in contact with its outer surface can also be arranged eccentrically with respect to the central axis of the rotary shaft (43). Since the upper roller (120) is arranged eccentrically with respect to the central axis of the rotary shaft (43), the upper roller (120) can compress the refrigerant in the upper compression chamber (111) as it rotates inside the upper cylinder (110).

[0109] An upper vane (115) may be movably installed in the upper cylinder (110). The upper vane (115) is connected to an elastic member (E) and can come into contact with the outer surface of the upper roller (120) by elastic force regardless of the position of the upper roller (120) inside the upper cylinder (110). By coming into contact with the outer surface of the upper roller (120), the upper vane (115) can divide the inner space of the upper cylinder (110) into a suction space where refrigerant is introduced through the upper refrigerant inlet (112) and an upper compression chamber (111) where the refrigerant is compressed. The upper compression chamber (111) may be defined as a space surrounded by the outer surface of the upper roller (120), the inner surface of the upper cylinder (110), and the upper vane (115). More specifically, the upper compression chamber (111) can be defined as a space surrounded by the outer surface of the upper roller (120), the inner surface of the upper cylinder (110), the upper vane (115), the upper cylinder cover (130) to be described later, and the mid plate (60) to be described later.

[0110] The compressor (11) may include an upper cylinder cover (130). The upper cylinder cover (130) may cover the upper side of the upper cylinder (110). The upper cylinder cover (130) may cover the upper side of the upper compression chamber (111). The upper cylinder cover (130) may support the upper cylinder (110).

[0111] The upper cylinder cover (130) may include an upper cover body (131). The upper cover body (131) may cover the upper side of the upper cylinder (110). The upper cover body (131) may contact the upper side of the upper cylinder (110). The upper cover body (131) may support the upper cylinder (110). The upper cover body (131) may be coupled to the upper cylinder (110). For example, the upper cover body (131) may be coupled to the upper cylinder (110) by a fastening member such as a screw.

[0112] The upper cylinder cover (130) may include a first shaft support (132) that supports a rotating shaft (43). The first shaft support (132) may penetrate the rotating shaft (43). The first shaft support (132) may function as a bearing that rotatably supports the rotating shaft (43). The first shaft support (132) may support the upper portion of the rotating shaft (43).

[0113] The first shaft support (132) may extend from the upper cover body (131). For example, the first shaft support (132) may extend upward from the upper cover body (131). For example, the upper cover body (131) and the first shaft support (132) may be formed integrally.

[0114] The lower compression chamber (211) may be formed in the inner direction of the circumference of the lower cylinder (210). For example, the lower cylinder (210) may have an approximately ring shape, and the lower compression chamber (211) may be formed in the inner portion of the ring shape of the lower cylinder (210).

[0115] The central axis of the inner space of the lower cylinder (210) may approximately coincide with the rotational axis of the rotary shaft (43) (same as the central axis of the rotary shaft (43)). For example, the lower cylinder (210) may have a ring shape with the rotational axis of the rotary shaft (43) as its central axis.

[0116] The lower cylinder (210) may include a lower refrigerant inlet (212) provided to allow refrigerant to flow into the lower compression chamber (211). The lower refrigerant inlet (212) may be connected to a lower cylinder inlet pipe (PI2). Refrigerant flowing from the accumulator (15) along the lower cylinder inlet pipe (PI2) may flow into the inside of the lower cylinder (210) through the lower refrigerant inlet (212).

[0117] A lower roller (220) may be provided rotatably on the inside of the lower cylinder (210). The outer diameter of the lower roller (220) may be smaller than the inner diameter of the lower cylinder (210). The lower roller (220) may be rotatably in contact with the inner circumferential surface of the lower cylinder (210).

[0118] The rotation axis of the lower roller (220) may be parallel to the vertical direction of the compressor (11). The rotation axis of the lower roller (220) may be parallel to the direction of gravity. The rotation axis of the lower roller (220) is parallel to the central axis of the rotation shaft (43), but the central axis of the lower roller (220) may be eccentric to one side from the central axis of the rotation shaft (43). The central axis of the lower roller (220) may be eccentric to one side in the radial direction from the central axis of the rotation shaft (43). The central axis of the lower roller (220) may be eccentric to one side in the radial direction from the rotation axis of the lower roller (220).

[0119] In detail, a lower cam (52) that contacts a lower roller (220) may be provided on the outer surface of the rotary shaft (43). The lower cam (52) may contact the inner surface of the lower roller (220) and transmit rotational force to the lower roller (220). The lower cam (52) may be coupled to the lower roller (220). The lower cam (52) may be fixed to the lower roller (220). The lower cam (52) may rotate about the central axis of the rotary shaft (43) when the rotary shaft (43) rotates. At this time, the central axis of the lower cam (52) may be eccentric to one side in the radial direction from the central axis of the rotary shaft (43).

[0120] For example, the lower roller (220) may have a roughly ring shape. The lower cam (52) may be arranged on the inner portion of the ring shape of the lower roller (220). The outer circumference of the lower cam (52) may be in contact with the inner circumference of the lower roller (220). Almost all of the outer circumference of the lower cam (52) may be in contact with almost all of the inner circumference of the lower roller (220). The lower cam (52) may be fitted and coupled to the inner circumference of the lower roller (220).

[0121] In this way, since the lower cam (52) is arranged eccentrically with respect to the central axis of the rotary shaft (43), the lower roller (220) in contact with its outer surface can also be arranged eccentrically with respect to the central axis of the rotary shaft (43). Since the lower roller (220) is arranged eccentrically with respect to the central axis of the rotary shaft (43), the lower roller (220) can compress the refrigerant in the upper compression chamber (111) as it rotates inside the lower cylinder (210).

[0122] In one embodiment, the upper cam (51) and the lower cam (52) may be eccentric in opposite directions with respect to the central axis of the rotary shaft (43). In addition, the upper roller (120) and the lower roller (220) may be eccentric in opposite directions with respect to the central axis of the rotary shaft (43). Therefore, the phase when the refrigerant in the upper compression chamber (111) is compressed by the upper roller (120) and the phase when the refrigerant in the lower compression chamber (211) is compressed by the lower roller (220) may be opposite to each other.

[0123] A lower vane (215) may be movably installed in the lower cylinder (210). The lower vane (215) is connected to an elastic member (E) and can come into contact with the outer surface of the lower roller (220) by elastic force regardless of the position of the lower roller (220) inside the lower cylinder (210). By coming into contact with the outer surface of the lower roller (220), the lower vane (215) can divide the inner space of the lower cylinder (210) into a suction space into which refrigerant is introduced through the lower refrigerant inlet (212) and a lower compression chamber (211) into which the refrigerant is compressed. The lower compression chamber (211) may be defined as a space surrounded by the outer surface of the lower roller (220), the inner surface of the lower cylinder (210), and the lower vane (215). More specifically, the lower compression chamber (211) can be defined as a space surrounded by the outer surface of the lower roller (220), the inner surface of the lower cylinder (210), the lower vane (215), the lower cylinder cover (230) to be described later, and the mid plate (60) to be described later.

[0124] The compressor (11) may include a lower cylinder cover (230). The lower cylinder cover (230) may cover the lower side of the lower cylinder (210). The lower cylinder cover (230) may cover the lower side of the lower compression chamber (211). The lower cylinder cover (230) may support the lower cylinder (210).

[0125] The lower cylinder cover (230) may include a lower cover body (231). The lower cover body (231) may cover the lower side of the lower cylinder (210). The lower cover body (231) may contact the lower side of the lower cylinder (210). The lower cover body (231) may support the lower cylinder (210). The lower cover body (231) may be coupled to the lower cylinder (210). For example, the lower cover body (231) may be coupled to the lower cylinder (210) by a fastening member such as a screw.

[0126] The lower cylinder cover (230) may include a second shaft support (232) that supports the rotary shaft (43). The second shaft support (232) may penetrate the rotary shaft (43). The second shaft support (232) may function as a bearing that rotatably supports the rotary shaft (43). The second shaft support (232) may support the lower portion of the rotary shaft (43).

[0127] The second shaft support (232) may extend from the lower cover body (231). For example, the second shaft support (232) may extend downward from the lower cover body (231). For example, the lower cover body (231) and the second shaft support (232) may be formed integrally.

[0128] The compressor (11) may include a mid plate (60) positioned between the upper cylinder (110) and the lower cylinder (210).

[0129] The mid plate (60) may be placed on the lower side of the upper cylinder (110). The mid plate (60) may cover the lower side of the upper cylinder (110). The mid plate (60) may cover the lower side of the upper compression chamber (111). The mid plate (60) may support the upper cylinder (110). The mid plate (60) may be coupled to the upper cylinder (110). For example, the mid plate (60) may be coupled to the upper cylinder (110) by a fastening member such as a screw.

[0130] The mid plate (60) may be placed on the upper side of the lower cylinder (210). The mid plate (60) may cover the upper side of the lower cylinder (210). The mid plate (60) may cover the upper side of the lower compression chamber (211). The mid plate (60) may support the lower cylinder (210). The mid plate (60) may be coupled to the lower cylinder (210). For example, the mid plate (60) may be coupled to the lower cylinder (210) by a fastening member such as a screw.

[0131] The mid plate (60) can partition an upper compression chamber (111) and a lower compression chamber (211).

[0132] The refrigerant compressed within the upper compression chamber (111) can be discharged into the inner side of the upper muffler (300), which will be described later, through the upper cylinder cover (130). The upper cylinder cover (130) can include an upper inlet hole (131b) connecting the inner side of the upper compression chamber (111) and the upper muffler (300). Specifically, the upper inlet hole (131b) can connect the upper compression chamber (111) and the separate muffler chamber (301). The refrigerant compressed within the upper compression chamber (111) can be introduced into the separate muffler chamber (301) through the upper inlet hole (131b).

[0133] The upper inlet hole (131b) may be provided on the upper side of the upper compression chamber (111). The refrigerant compressed within the upper compression chamber (111) may be discharged upward through the upper inlet hole (131b) and introduced into the interior of the separation muffler chamber (301).

[0134] The upper cylinder cover (130) may include an upper cover groove (131a). The upper cover groove (131a) may be formed by a portion of the upper surface of the upper cover body (131) being sunken downward. An upper inlet hole (131b) may be provided in the upper cover groove (131a).

[0135] An upper valve (71) configured to open and close an upper inlet hole (131b) may be installed in the upper cover groove (131a). The upper valve (71) may open the upper inlet hole (131b) based on a pressure of the refrigerant within the upper compression chamber (111) being above a certain level, and may close the upper inlet hole (131b) based on a pressure being below a certain level. An upper valve guide (72) configured to prevent the upper valve (71) from opening excessively upward may be installed in the upper cover groove (131a).

[0136] The refrigerant compressed within the lower compression chamber (211) can be discharged into the lower muffler (400), which will be described later, through the lower cylinder cover (230). The lower cylinder cover (230) can include a lower inlet hole (231b) connecting the lower compression chamber (211) and the interior of the lower muffler (400). Specifically, the lower inlet hole (231b) can connect the lower compression chamber (211) and the lower muffler chamber (401). The refrigerant compressed within the lower compression chamber (211) can be introduced into the lower muffler chamber (401) through the lower inlet hole (231b).

[0137] The lower inlet hole (231b) may be provided at the lower side of the lower compression chamber (211). The refrigerant compressed within the lower compression chamber (211) may be discharged downward through the lower inlet hole (231b) and introduced into the lower muffler chamber (401).

[0138] The lower cylinder cover (230) may include a lower cover groove (231a). The lower cover groove (231a) may be formed by a portion of the lower surface of the lower cover body (231) being sunken upward. A lower inlet hole (231b) may be provided in the lower cover groove (231a).

[0139] A lower valve (81) configured to open and close a lower inlet hole (231b) may be installed in the lower cover groove (231a). The lower valve (81) may open the lower inlet hole (231b) based on a pressure of the refrigerant within the lower compression chamber (211) being above a certain level, and may close the lower inlet hole (231b) based on a pressure being below a certain level. A lower valve guide (82) configured to prevent the lower valve (81) from opening excessively downward may be installed in the lower cover groove (231a).

[0140] By these configurations, the refrigerant can be compressed in each of the upper compression chamber (111) and the lower compression chamber (211), and the refrigerant in the upper compression chamber (111) and the lower compression chamber (211) can be discharged from the upper compression chamber (111) and the lower compression chamber (211) through the upper inlet hole (131b) and the lower inlet hole (213b), respectively.

[0141] Meanwhile, when high-pressure refrigerant is discharged at high speed from the compression chamber (111, 211) through the upper inlet hole (131b) and the lower inlet hole (231b) with narrow diameters, the flow noise of the refrigerant may be excessively loud. Therefore, in order to reduce the noise of the refrigerant, the compressor (11) may include an upper muffler (300) and a lower muffler (400) that are provided to reduce the noise of the refrigerant discharged from the compression chamber (111, 211).

[0142] The upper muffler (300) may be placed on the upper side of the upper compression chamber (111). The upper muffler (300) may be placed on the upper side of the upper cylinder (110). The upper muffler (300) may be placed on the upper side of the upper cylinder cover (130). The upper muffler (300) may be coupled to the upper cylinder cover (130). The upper muffler (300) may be coupled to the upper cylinder (110). For example, the upper muffler (300) may be coupled to the upper cylinder cover (130) and / or the upper cylinder (110) by a fastening member such as a screw.

[0143] The upper muffler (300) may be provided to reduce the noise of the refrigerant discharged from the upper compression chamber (111). The upper muffler (300) may include a separate muffler chamber (301) provided to reduce the noise of the refrigerant discharged from the upper compression chamber (111). The separate muffler chamber (301) may also be referred to as a term such as “first upper muffler chamber (301).” As illustrated in FIG. 5, the separate muffler chamber (301) is formed to have a larger width and volume than the upper compression chamber (111) and the upper inlet hole (131b), and when the refrigerant in the upper compression chamber (111) flows into the separate muffler chamber (301) through the upper inlet hole (131b), the speed and pressure of the refrigerant are reduced, so that the flow noise of the refrigerant can be reduced.

[0144] The upper muffler (300) may include a first discharge hole (312) provided to discharge the refrigerant within the separate muffler chamber (301). The refrigerant, which has reduced noise as it passes through the separate muffler chamber (301), may be discharged to the outside of the upper muffler (300) through the first discharge hole (312). The first discharge hole (312) may be provided to discharge the refrigerant within the separate muffler (310) that has been introduced from the upper compression chamber (111).

[0145] The lower muffler (400) may be placed on the lower side of the lower compression chamber (211). The lower muffler (400) may be placed on the lower side of the lower cylinder (210). The lower muffler (400) may be placed on the lower side of the lower cylinder cover (230). The lower muffler (400) may be coupled to the lower cylinder cover (230). The lower muffler (400) may be coupled to the lower cylinder (210). For example, the lower muffler (400) may be coupled to the lower cylinder cover (230) and / or the lower cylinder (210) by a fastening member such as a screw.

[0146] The lower muffler (400) may be provided to reduce the noise of the refrigerant discharged from the lower compression chamber (211). The lower muffler (400) may include a lower muffler chamber (401) provided to reduce the noise of the refrigerant discharged from the lower compression chamber (211). As illustrated in FIG. 5, the lower muffler chamber (401) is formed to have a larger width and volume than the lower compression chamber (211) and the lower inlet hole (231b), and when the refrigerant in the lower compression chamber (211) flows into the lower muffler chamber (401) through the lower inlet hole (231b), the speed and pressure of the refrigerant are reduced, so that the flow noise of the refrigerant can be reduced.

[0147] Meanwhile, since a certain amount of oil is stored in the lower part of the housing (30) of the compressor (11), there may be a limitation in forming a discharge hole in the lower muffler (400) to directly discharge the refrigerant in the lower muffler chamber (401) to the outside. Accordingly, a passage (F) extending upward from the lower muffler chamber (401) and for discharging the refrigerant in the lower muffler chamber (401) may be provided to discharge the refrigerant upward from the lower muffler chamber (401). As illustrated in FIG. 5, the passage (F) may extend upward from the lower muffler chamber (401).

[0148] According to one embodiment, the refrigerant within the lower muffler chamber (401) may move along the passage (F) and be discharged from the upper muffler (300) side. The upper muffler (300) may include a connecting muffler chamber (302) provided to reduce noise of the refrigerant from the lower muffler chamber (401), and a second discharge hole (322) provided to discharge the refrigerant within the connecting muffler chamber (302). The connecting muffler chamber (302) may also be referred to as a “second upper muffler chamber (302).” The connecting muffler chamber (302) may constitute a part of the passage (F) for discharging the refrigerant within the lower muffler chamber (401). The second discharge hole (322) may be provided to discharge the refrigerant within the connecting muffler (320) that has flowed in from the lower muffler (401).

[0149] The euro (F) may include a connecting passage (FC) connecting the upper muffler (300) and the lower muffler (400). The connecting passage (FC) may connect the connecting muffler (320) and the lower muffler (400). The connecting passage (FC) may connect the lower muffler chamber (401) and the connecting muffler chamber (302). The refrigerant in the lower muffler chamber (401) may move to the connecting muffler chamber (302) through the connecting passage (FC).

[0150] For example, the connecting path (FC) may be formed by components disposed between the lower muffler (400) and the upper muffler (300). As illustrated in FIGS. 3 to 5, the lower cylinder cover (230) may include a lower cover hole (231c), the lower cylinder (210) may include a lower cylinder hole (213), the mid plate (60) may include a mid plate hole (61), the upper cylinder (110) may include an upper cylinder hole (113), the upper cylinder cover (130) may include an upper cover hole (131c), and the upper muffler (300) may include a muffler hole (314). The lower cover hole (231c), the lower cylinder hole (213), the mid plate hole (61), the upper cylinder hole (113), the upper cover hole (131c), and the muffler hole (314) can be arranged in a vertical direction parallel to each other, thereby forming a connecting path (FC).

[0151] Each of the holes described above corresponds to holes that connect the lower muffler room (401) and the connecting muffler room (302), and are provided so that the refrigerant from the lower muffler room (401) flows into the connecting muffler room (302) through the connecting passage (FC), and may be collectively referred to as “connecting holes” hereinafter.

[0152] Unlike those illustrated in FIGS. 3 to 6, in one embodiment, the fixed components may be formed integrally with each other. For example, at least some of the upper muffler (300), the upper cylinder cover (130), the upper cylinder (110), the mid plate (60), the lower cylinder (210), the lower cylinder cover (230), and the lower muffler (400) may be formed integrally with each other, or at least some of the rotating shaft (43), the upper cam (51), the upper roller (120), the lower cam (52), and the lower roller (220) may be formed integrally with each other.

[0153] Meanwhile, since the path through which the compressed refrigerant is discharged from the lower compression chamber (211) extends upward, if the path overlaps with the path through which the compressed refrigerant is discharged from the upper compression chamber (111), interference may occur between the refrigerants flowing along each path, and in this case, the discharge pressure of the refrigerant may decrease. In addition, as described above, the phases of the refrigerant when discharged from the upper compression chamber (111) and the phases of the refrigerant when discharged from the lower compression chamber (211) may be opposite to each other, and if the refrigerant discharge paths overlap each other, a problem of some of the refrigerant flowing backward may occur. This may lead to a problem of lowering the overall performance of the compressor (11).

[0154] FIG. 7 is a perspective view illustrating some components of a compressor according to one embodiment of the present disclosure, such as a rotating shaft, an upper cylinder, a lower cylinder, an upper cylinder cover, a lower cylinder cover, a separate muffler, a connecting muffler, and a lower muffler. FIG. 8 is a diagram illustrating a state in which refrigerant in an upper compression chamber of a compressor according to one embodiment of the present disclosure flows into a separate muffler chamber and is discharged through a first discharge hole. FIG. 9 is a diagram illustrating a state in which refrigerant from a lower muffler chamber of a compressor according to one embodiment of the present disclosure flows into a connecting muffler chamber and is discharged through a second discharge hole.

[0155] In order to solve the above-mentioned problems, referring to FIGS. 7 to 9, in a compressor (11) according to one embodiment of the present disclosure, a passage through which refrigerant is discharged from an upper compression chamber (111) and a passage through which refrigerant is discharged from a lower compression chamber (211) may be separated from each other. A separate muffler chamber (301) may be separated from a passage (F) provided to discharge refrigerant within a lower muffler chamber (401).

[0156] In detail, the separation muffler chamber (301) and the connection muffler chamber (302) can be partitioned from each other. As the separation muffler chamber (301) connected to the upper compression chamber (111) and the connection muffler chamber (302) connected to the lower muffler chamber (401) are partitioned from each other, the path through which the refrigerant is discharged from the upper compression chamber (111) and the path through which the refrigerant is discharged from the lower compression chamber (211) can be partitioned from each other.

[0157] The upper muffler (300) may include a separate muffler (310) and a connecting muffler (320). The separate muffler (310) may be referred to as a “first upper muffler (310).” The connecting muffler (320) may be referred to as a “second upper muffler (320).”

[0158] The separation muffler chamber (301) may be defined inside the separation muffler (310). The connection muffler chamber (302) may be defined inside the connection muffler (320). The expression "the separation muffler chamber (301) and the connection muffler chamber (302) are partitioned from each other" may be replaced with the expression "the separation muffler (310) and the connection muffler (320) are partitioned from each other." In addition, the expression "the separation muffler chamber (301) and the connection muffler chamber (302) are partitioned from each other" may be replaced with the expression "the inside of the separation muffler (310) and the inside of the connection muffler (320) are partitioned from each other."

[0159] A separation muffler (310) can cover the upper side of a separation muffler room (301). The separation muffler room (301) can be formed between the separation muffler (310) and the upper cylinder cover (130). Specifically, the separation muffler (310) can include a first space forming portion (311) that covers the upper side of the upper inlet hole (131b), and the separation muffler room (301) can be formed between the first space forming portion (311) and the upper cylinder cover (130). The separation muffler (310) can include a first coupling portion (313) that is in contact with the upper cover body (131) and coupled to the upper cover body (131), and the first space forming portion (311) can have a shape that protrudes upward from the first coupling portion (313).

[0160] The first space forming portion (311) can be in contact with the first shaft support portion (132) of the upper cylinder cover (130). For example, a hole can be formed in the center of the first space forming portion (311), and the hole of the first space forming portion (311) can be penetrated by the first shaft support portion (132). The outer circumferential surface of the first shaft support portion (132) can be in contact with the periphery of the hole of the first space forming portion (311).

[0161] The connecting muffler (320) can cover the upper side of the connecting muffler room (302). The connecting muffler room (302) can be formed between the separation muffler (310) and the connecting muffler (320). Specifically, the connecting muffler (320) can include a second space forming portion (321) that covers the upper side of the connection path (FC), the connection hole or the muffler hole (314), and the connecting muffler room (302) can be formed between the second space forming portion (321) and the separation muffler (310). The connecting muffler (320) can include a second joining portion (323) that is in contact with the first joining portion (313) and joined to the first joining portion (313), and the second space forming portion (321) can have a shape that protrudes upward from the second joining portion (323).

[0162] For example, the second coupling portion (323) can cover the first coupling portion (313) from the upper side.

[0163] For example, a muffler hole (314) can be formed in the first joint portion (313) of the separation muffler (310).

[0164] The first space forming portion (311) of the separation muffler (310) and the second space forming portion (321) of the connection muffler (320) may be in contact with each other. For example, a hole may be formed in the center of the second space forming portion (321), and at least a portion of the first space forming portion (311) may penetrate the hole of the second space forming portion (321). At least a portion of the outer surface of the first space forming portion (311) may be in contact with the periphery of the hole of the second space forming portion (321).

[0165] By the structure of the separation muffler (310) and the connection muffler (320), the separation muffler room (301) and the connection muffler room (302) can be separated from each other.

[0166] As illustrated in FIGS. 7 to 9, the separation muffler (310) and the connection muffler (320) may be coupled to each other. For example, the separation muffler (310) and the connection muffler (320) may be coupled to each other by a fastening member such as a screw. Alternatively, the separation muffler (310) and the connection muffler (320) may be formed integrally with each other.

[0167] The refrigerant within the separated muffler chamber (301) can be discharged through the first discharge hole (312). The first discharge hole (312) can be formed in the separated muffler (310). The path through which the refrigerant is discharged from the upper compression chamber (111) can extend from the upper compression chamber (111) through the separated muffler chamber (301) to the first discharge hole (312). For example, the first discharge hole (312) can be provided so that the refrigerant within the separated muffler chamber (301) is discharged upward.

[0168] The first exhaust hole (312) may be formed in the first space forming portion (311). For example, the first exhaust hole (312) may be formed in at least a portion of the first space forming portion (311) that penetrates the second space forming portion (321). The first exhaust hole (312) may be positioned above the second space forming portion (321). For example, the first exhaust hole (312) may be formed on the upper surface of the first space forming portion (311).

[0169] The first discharge hole (312) may be formed between the first shaft support member (132) and the separation muffler (310). The first discharge hole (312) may be formed in the space between the periphery of the hole of the first space forming member (311) and the outer surface of the first shaft support member (132) penetrating therethrough.

[0170] The upper inlet hole (131b) and the first discharge hole (312) may be arranged to be horizontally spaced from each other. The refrigerant introduced into the separation muffler chamber (301) through the upper inlet hole (131b) may move not only vertically but also horizontally and be discharged through the first discharge hole (312). This may further enhance the noise reduction efficiency of the refrigerant.

[0171] For example, the first discharge hole (312) may be provided in multiples. Alternatively, the first discharge hole (312) may be provided in singles.

[0172] The refrigerant inside the connecting muffler chamber (302) can be discharged through the second discharge hole (322). The second discharge hole (322) can be formed in the connecting muffler (320). A flow path (F) through which the refrigerant is discharged from the lower muffler chamber (401) can extend from the lower muffler chamber (401) through the connecting muffler chamber (302) to the second discharge hole (322). The flow path (F) can extend from the lower muffler (400) through the inside of the connecting muffler (320) to the second discharge hole (322). The connecting muffler chamber (302) can form a part of the flow path (F). For example, the second discharge hole (322) can be provided so that the refrigerant inside the connecting muffler chamber (302) is discharged upward.

[0173] The second discharge hole (322) may be formed in the second space forming portion (321). For example, the second discharge hole (322) may be formed on the upper surface of the second space forming portion (321).

[0174] The connecting holes, such as the upper cover hole (131c), the muffler hole (314), and the second discharge hole (322), may be arranged to be spaced apart from each other in the horizontal direction. The refrigerant introduced into the connecting muffler chamber (302) through the connecting hole may move not only vertically but also horizontally and be discharged through the second discharge hole (322). As a result, the noise reduction efficiency of the refrigerant may be further improved.

[0175] For example, the second discharge hole (322) may be provided in multiples. Alternatively, the second discharge hole (322) may be provided in singles.

[0176] As illustrated in FIGS. 7 to 9, the first discharge hole (312) may be arranged adjacent to the rotary shaft (43). The second discharge hole (322) may be arranged relatively far from the rotary shaft (43). That is, the distance between the rotary shaft (43) and the first discharge hole (312) may be shorter than the distance between the rotary shaft (43) and the second discharge hole (322).

[0177] By this structure, the refrigerant compressed in the upper compression chamber (111) can be introduced into the separate muffler chamber (301) of the upper muffler (300) through the upper inlet hole (131b), and the flow rate of the refrigerant within the separate muffler chamber (301) can be reduced. The refrigerant within the separate muffler chamber (301) can be discharged from the separate muffler chamber (301) through the first discharge hole (312) formed in the separate muffler (310).

[0178] In addition, the refrigerant compressed in the lower compression chamber (211) can be introduced into the lower muffler chamber (401) of the lower muffler (400) through the lower inlet hole (231b), and the flow rate of the refrigerant can be reduced within the lower muffler chamber (401). The refrigerant within the lower muffler chamber (401) can be introduced into the connecting muffler chamber (302) partitioned from the separate muffler chamber (301) through the connecting passage (FC), and the flow rate of the refrigerant can be reduced once again within the connecting muffler chamber (302). The refrigerant within the connecting muffler chamber (302) can be discharged from the connecting muffler chamber (302) through the second discharge hole (322) formed in the connecting muffler (320).

[0179] In this way, by the structure of the upper muffler (300) according to one embodiment, the flow path of the refrigerant discharged from the upper compression chamber (111) and the flow path of the refrigerant discharged from the lower compression chamber (211) can be separated from each other.

[0180] Even if the refrigerant flow path discharged from the upper compression chamber (111) and the refrigerant flow path discharged from the lower compression chamber (211) are separated from each other, the refrigerants discharged along each flow path can be mixed again inside the housing (30). According to one embodiment, the compressor (1) may be configured so that the refrigerant discharged through the first discharge hole (312) from the separation muffler (310) and the refrigerant discharged through the flow path (F) are mixed at the upper side of the separation muffler (310). The refrigerant discharged through the first discharge hole (312) from the separation muffler (310) and the refrigerant discharged through the second discharge hole (322) from the connection muffler (320) may be configured so that they are mixed at the upper side of the separation muffler (310). That is, the refrigerant discharged from the separation muffler (310) through the first discharge hole (312) and the refrigerant discharged from the connection muffler (320) through the second discharge hole (322) can be mixed with each other within the receiving space (S) of the housing (300). Since the volume of the receiving space (S) is much larger than the volumes of each of the separation muffler chamber (301) and the connection muffler chamber (302), even if the refrigerants are mixed with each other within the receiving space (S), the degree to which the flow interference between the refrigerants affects the pressure loss may be minimal. Accordingly, the refrigerant discharged from the separation muffler (310) through the first discharge hole (312) and the refrigerant discharged from the connection muffler (320) through the second discharge hole (322) can be mixed within the receiving space (S) and then discharged to the outside of the compressor (1) through the compressor discharge pipe (PO).

[0181] FIG. 10 is a perspective view illustrating some components of a compressor according to one embodiment of the present disclosure, such as a rotating shaft, an upper cylinder, a lower cylinder, an upper cylinder cover, a lower cylinder cover, a separate muffler, a connecting muffler, and a lower muffler. FIG. 11 is a diagram illustrating a state in which refrigerant in an upper compression chamber of a compressor according to one embodiment of the present disclosure flows into a separate muffler chamber and is discharged through a first discharge hole. FIG. 12 is a diagram illustrating a state in which refrigerant from a lower muffler chamber of a compressor according to one embodiment of the present disclosure flows into a connecting muffler chamber and is discharged through a second discharge hole.

[0182] When describing the configurations of a compressor (11) according to one embodiment of the present disclosure with reference to FIGS. 10 to 12, configurations corresponding to those in the embodiment described with reference to FIGS. 1 to 9 may be given the same drawing reference numerals and descriptions thereof may be omitted.

[0183] Referring to FIGS. 10 to 12, a compressor (11) according to one embodiment of the present disclosure may include an upper muffler (1300) including a separate muffler chamber (1301) configured to reduce noise of refrigerant discharged from an upper compression chamber (111), and a lower muffler (400) including a lower muffler chamber (401) configured to reduce noise of refrigerant discharged from a lower compression chamber (211). The refrigerant in the lower muffler chamber (401) may move toward the upper muffler (1300) through a connecting passage (FC). The upper muffler (1300) may include a connecting muffler chamber (1302) connected to the lower muffler chamber (401).

[0184] The path through which the refrigerant is discharged from the upper compression chamber (111) and the path through which the refrigerant is discharged from the lower compression chamber (211) can be separated from each other. The separate muffler chamber (1301) can be separated from the path (F) provided to discharge the refrigerant within the lower muffler chamber (401). Specifically, the separate muffler chamber (1301) and the connecting muffler chamber (1302) can be separated from each other.

[0185] The upper muffler (1300) may include a separate muffler (1310) and a connecting muffler (1320).

[0186] A separation muffler (1310) may cover the upper side of a separation muffler chamber (1301). The separation muffler chamber (1301) may be formed between the separation muffler (1310) and the upper cylinder cover (130). Specifically, the separation muffler (1310) may include a first space forming portion (1311) that covers the upper side of the upper inlet hole (131b), and the separation muffler chamber (1301) may be formed between the first space forming portion (1311) and the upper cylinder cover (130). The separation muffler (1310) may include a first coupling portion (1313) that is in contact with the upper cover body (131) and coupled to the upper cover body (131), and the first space forming portion (1311) may have a shape that protrudes upward from the first coupling portion (1313).

[0187] The first space forming portion (1311) can be in contact with the first shaft support portion (132) of the upper cylinder cover (130). For example, a hole can be formed in the center of the first space forming portion (1311), and the hole of the first space forming portion (1311) can be penetrated by the first shaft support portion (132). The outer circumferential surface of the first shaft support portion (132) can be in contact with the periphery of the hole of the first space forming portion (1311).

[0188] The connecting muffler (1320) can cover the upper side of the connecting muffler room (1302). The connecting muffler room (1302) can be formed between the separation muffler (1310) and the connecting muffler (1320). Specifically, the connecting muffler (1320) can include a second space forming portion (1321) that covers the upper side of the connection path (FC), the connection hole or the muffler hole (1314), and the connecting muffler room (1302) can be formed between the second space forming portion (1321) and the separation muffler (1310). The connecting muffler (1320) may include a second connecting portion (1323) that is in contact with the first connecting portion (1313) and is connected to the first connecting portion (1313), and the second space forming portion (1321) may have a shape that protrudes upward from the second connecting portion (1323).

[0189] By this structure, the euro (F) can pass between the separation muffler (310) and the connection muffler (320).

[0190] For example, the second coupling portion (1323) can cover the first coupling portion (1313) from the upper side.

[0191] For example, a muffler hole (1314) may be formed in the first coupling portion (1313) of the separation muffler (1310).

[0192] The first space forming portion (1311) of the separation muffler (1310) and the second space forming portion (1321) of the connection muffler (1320) may be in contact with each other. For example, a hole may be formed in the center of the second space forming portion (1321), and at least a portion of the first space forming portion (1311) may penetrate the hole of the second space forming portion (1321). At least a portion of the outer surface of the first space forming portion (1311) may be in contact with the periphery of the hole of the second space forming portion (1321).

[0193] By the structure of the separation muffler (1310) and the connection muffler (1320), the separation muffler room (1301) and the connection muffler room (1302) can be separated from each other.

[0194] As illustrated in FIGS. 10 to 12, the separation muffler (1310) and the connection muffler (1320) may be coupled to each other. For example, the separation muffler (1310) and the connection muffler (1320) may be coupled to each other by a fastening member such as a screw. Alternatively, the separation muffler (1310) and the connection muffler (1320) may be formed integrally with each other.

[0195] The refrigerant within the separated muffler chamber (1301) can be discharged through the first discharge hole (1312). The first discharge hole (1312) can be formed in the separated muffler (1310). The path through which the refrigerant is discharged from the upper compression chamber (111) can extend from the upper compression chamber (111) through the separated muffler chamber (1301) to the first discharge hole (1312). For example, the first discharge hole (1312) can be provided so that the refrigerant within the separated muffler chamber (1301) is discharged in a horizontal direction.

[0196] Since other components such as a drive motor (40) may be placed above the upper muffler (1300), the first discharge hole (1312) may discharge the refrigerant in a horizontal direction rather than a vertical direction as in the present embodiment, thereby preventing interference with the discharge of the refrigerant by other components. In addition, the first discharge hole (1312) may be provided to discharge the refrigerant within the separate muffler chamber (1301) in a direction inclined at a predetermined angle with respect to the horizontal direction.

[0197] The first exhaust hole (1312) may be formed in the first space forming portion (1311). For example, the first exhaust hole (1312) may be formed in at least a portion of the first space forming portion (1311) that penetrates the second space forming portion (1321). The first exhaust hole (1312) may be positioned above the second space forming portion (1321). For example, the first exhaust hole (1312) may be formed on the outer circumferential surface of the first space forming portion (1311).

[0198] The upper inlet hole (131b) and the first discharge hole (1312) may be arranged to be horizontally spaced from each other. The refrigerant introduced into the separation muffler chamber (1301) through the upper inlet hole (131b) may move not only vertically but also horizontally and be discharged through the first discharge hole (1312). This may further enhance the noise reduction efficiency of the refrigerant.

[0199] For example, the first discharge hole (1312) may be provided in multiples. Alternatively, the first discharge hole (1312) may be provided in singles.

[0200] The refrigerant within the connecting muffler chamber (1302) can be discharged through the second discharge hole (1322). The second discharge hole (1322) can be formed in the connecting muffler (1320). The flow path (F) through which the refrigerant is discharged from the lower muffler chamber (401) can extend from the lower muffler chamber (401) through the connecting muffler chamber (1302) to the second discharge hole (1322). For example, the second discharge hole (1322) can be provided so that the refrigerant within the connecting muffler chamber (1302) is discharged in a horizontal direction.

[0201] Since other components such as a drive motor (40) may be placed above the upper muffler (1300), the second discharge hole (1322) may discharge the refrigerant in a horizontal direction rather than a vertical direction as in the present embodiment, thereby preventing interference with the discharge of the refrigerant by other components. In addition, the second discharge hole (1322) may be provided to discharge the refrigerant within the connection muffler chamber (1302) in a direction inclined at a predetermined angle with respect to the horizontal direction.

[0202] The second discharge hole (1322) may be formed in the second space forming portion (1321). For example, the second discharge hole (1322) may be formed on the outer surface of the second space forming portion (1321).

[0203] The connecting holes, such as the upper cover hole (131c), the muffler hole (1314), and the second discharge hole (1322), may be arranged to be spaced apart from each other in the horizontal direction. The refrigerant introduced into the connecting muffler chamber (1302) through the connecting hole may move not only vertically but also horizontally and be discharged through the second discharge hole (1322). As a result, the noise reduction efficiency of the refrigerant may be further improved.

[0204] For example, the second discharge hole (1322) may be provided in multiples. Alternatively, the second discharge hole (1322) may be provided in singles.

[0205] As shown in FIGS. 10 to 12, the distance between the rotating shaft (43) and the first discharge hole (1312) may be shorter than the distance between the rotating shaft (43) and the second discharge hole (1322).

[0206] By this structure, the refrigerant compressed in the upper compression chamber (111) can be introduced into the separate muffler chamber (1301) of the upper muffler (1300) through the upper inlet hole (131b), and the flow rate of the refrigerant within the separate muffler chamber (1301) can be reduced. The refrigerant within the separate muffler chamber (1301) can be discharged from the separate muffler chamber (1301) through the first discharge hole (1312) formed in the separate muffler (1310).

[0207] In addition, the refrigerant compressed in the lower compression chamber (211) can be introduced into the lower muffler chamber (401) of the lower muffler (400) through the lower inlet hole (231b), and the flow rate of the refrigerant can be reduced within the lower muffler chamber (401). The refrigerant within the lower muffler chamber (401) can be introduced into the connecting muffler chamber (1302) partitioned from the separated muffler chamber (1301) through the connecting passage (FC), and the flow rate of the refrigerant can be reduced once again within the connecting muffler chamber (1302). The refrigerant within the connecting muffler chamber (1302) can be discharged from the connecting muffler chamber (1302) through the second discharge hole (1322) formed in the connecting muffler (1320).

[0208] In this way, by the structure of the upper muffler (1300) according to one embodiment, the flow path of the refrigerant discharged from the upper compression chamber (111) and the flow path of the refrigerant discharged from the lower compression chamber (211) can be separated from each other.

[0209] The refrigerant discharged from the separation muffler (1310) through the first discharge hole (1312) and the refrigerant discharged from the connection muffler (1320) through the second discharge hole (1322) can be mixed at the upper side of the separation muffler (1310). The refrigerant discharged from the separation muffler (1310) through the first discharge hole (1312) and the refrigerant discharged from the connection muffler (1320) through the second discharge hole (1322) can be mixed in the receiving space (S) of the housing (30).

[0210] FIG. 13 is a perspective view illustrating some components of a compressor according to an embodiment of the present disclosure, such as a rotating shaft, an upper cylinder, a lower cylinder, an upper cylinder cover, a lower cylinder cover, an upper muffler, a lower muffler, and a discharge pipe. FIG. 14 is a cross-sectional perspective view illustrating a state in which refrigerant in an upper compression chamber of a compressor according to an embodiment of the present disclosure is discharged through an upper muffler chamber and a discharge hole, and refrigerant in a lower muffler chamber is discharged through a connecting passage and a discharge pipe. FIG. 15 is a cross-sectional perspective view illustrating a state in which refrigerant in an upper compression chamber of a compressor according to an embodiment of the present disclosure is discharged through an upper muffler chamber and a discharge hole, and refrigerant in a lower muffler chamber is discharged through a connecting passage and a discharge pipe.

[0211] When describing the configurations of a compressor (11) according to one embodiment of the present disclosure with reference to FIGS. 13 to 15, configurations corresponding to those in the embodiment described with reference to FIGS. 1 to 9 may be given the same drawing reference numerals and descriptions thereof may be omitted.

[0212] Referring to FIGS. 13 to 15, a compressor (11) according to one embodiment of the present disclosure may include an upper muffler (2310) provided to reduce noise of refrigerant discharged from an upper compression chamber (111), and a lower muffler (400) provided to reduce noise of refrigerant discharged from a lower compression chamber (211).

[0213] The upper muffler (2310) may include an upper muffler chamber (2301) provided to reduce noise of refrigerant discharged from the upper compression chamber (111), and a discharge hole (2312) provided to discharge refrigerant within the upper muffler chamber (2301).

[0214] The upper muffler (2310) may be referred to as a “separate muffler (2310).” The upper muffler chamber (2301) may be referred to as a “separate muffler chamber (2301).”

[0215] The upper muffler (2310) may include a space forming portion (2311) that covers the upper side of the upper muffler chamber (2301). The upper muffler chamber (2301) may be formed between the space forming portion (2311) and the upper cover body (131). The space forming portion (2311) may cover the upper side of the upper inlet hole (131b).

[0216] The upper muffler (2310) may include a connecting portion (2313) that is in contact with the upper cover body (131) and is coupled to the upper cover body (131). The space forming portion (2311) may have a shape that protrudes upward from the connecting portion (2313).

[0217] The space forming portion (2311) can be in contact with the first shaft support portion (132) of the upper cylinder cover (130). For example, a hole can be formed in the center of the space forming portion (2311), and the hole of the space forming portion (2311) can be penetrated by the first shaft support portion (132). The outer circumferential surface of the first shaft support portion (132) can be in contact with the periphery of the hole of the space forming portion (2311).

[0218] The refrigerant in the upper muffler chamber (2301) can be discharged through the discharge hole (2312). The path through which the refrigerant is discharged from the upper compression chamber (111) can extend from the upper compression chamber (111) through the upper muffler chamber (2301) to the discharge hole (2312).

[0219] For example, the discharge hole (2312) may be provided so that the refrigerant within the upper muffler chamber (2301) is discharged in a vertical direction. Alternatively, for example, the discharge hole (2312) may be provided so that the refrigerant within the upper muffler chamber (2301) is discharged in a horizontal direction.

[0220] The discharge hole (2312) can be formed in the space forming part (2311).

[0221] The upper inlet hole (131b) and the discharge hole (2312) can be arranged to be spaced apart from each other in the horizontal direction.

[0222] For example, the discharge hole (2312) may be provided in multiples. Alternatively, the discharge hole (2312) may be provided in singles.

[0223] As illustrated in FIGS. 13 to 15, the compressor (11) may include a discharge pipe (500) provided to discharge the refrigerant within the lower muffler chamber (401) upward. A flow path (F) provided to discharge the refrigerant within the lower muffler chamber (401) may extend from the lower muffler chamber (401) toward the discharge pipe (500).

[0224] The discharge pipe (500) may have the shape of a pipe having a substantially hollow shape. A flow path through which the refrigerant can flow may be formed inside the discharge pipe (500).

[0225] For example, the discharge pipe (500) may extend vertically. The discharge pipe (500) may discharge the refrigerant upward.

[0226] The discharge pipe (500) may be connected to the lower muffler chamber (401). The discharge pipe (500) may be connected to a connection path (FC). The refrigerant within the lower muffler chamber (401) may flow upward along the connection path (FC) and then be discharged through the discharge pipe (500).

[0227] The discharge pipe (500) may extend from the upper cover hole (131c) of the upper cylinder cover (130). For example, the discharge pipe (500) may extend upward from the upper cover hole (131c). The discharge pipe (500) may be connected to a connection path (FC) through the upper cover hole (131c).

[0228] In this way, since the discharge pipe (500) has a structure extending upward from the upper cover hole (131c), it is possible to prevent oil stored in the housing (30) from flowing into the connecting passage (FC).

[0229] The path through which the refrigerant is discharged from the upper compression chamber (111) and the path through which the refrigerant is discharged from the lower compression chamber (211) can be separated from each other. The upper muffler chamber (2301) can be separated from the path (F) provided to discharge the refrigerant within the lower muffler chamber (401). That is, the discharge pipe (500) and the upper muffler chamber (2301) can be separated from each other.

[0230] The discharge pipe (500) may pass through the upper muffler (2310) so that the discharge pipe (500) is separated from the upper muffler room (2301) and connected to the connection path (FC) to guide the discharge of the refrigerant. For example, a muffler hole (2314) may be formed in the joint portion (2313) of the upper muffler (2310). The discharge pipe (500) may pass through the muffler hole (2314) and be connected to the connection path (FC).

[0231] The discharge pipe (500) can be connected to the upper cylinder cover (130). The discharge pipe (500) can be connected to the connection path (FC) by being connected to the upper cylinder cover (130) through the upper cover hole (131c).

[0232] According to the embodiment of Fig. 14, one end of the discharge pipe (500) connected to the connecting path (FC), i.e., the lower end of the discharge pipe (500), may be positioned to be substantially horizontal with the upper surface of the upper cylinder cover (130). For example, the discharge pipe (500) may be joined to the upper cylinder cover (130) in such a way that the lower end is welded to the upper surface of the upper cylinder cover (130).

[0233] According to the embodiment of FIG. 15, the discharge pipe (500) can be inserted into the upper cover hole (131c) of the upper cylinder cover (130) at its lower end. For example, the discharge pipe (500) can be coupled to the upper cylinder cover (130) in such a way that the lower end is press-fitted into the upper cover hole (131c). Alternatively, the discharge pipe (500) can be coupled to the upper cylinder cover (130) in such a way that the lower end is inserted into the upper cover hole (131c) and is fastened to the upper cylinder cover (130) by a fastening member such as a screw.

[0234] Alternatively, the discharge pipe (500) may be formed integrally with the upper cylinder cover (130).

[0235] In this way, by the structure of the upper muffler (2310) and the discharge pipe (500) according to one embodiment, the flow path of the refrigerant discharged from the upper compression chamber (111) and the flow path of the refrigerant discharged from the lower compression chamber (211) can be separated from each other.

[0236] The refrigerant discharged from the upper muffler (2310) through the discharge hole (2312) and the refrigerant discharged from the discharge pipe (500) can be mixed at the upper side of the upper muffler (2310). The refrigerant discharged from the upper muffler (2310) through the discharge hole (2312) and the refrigerant discharged from the discharge pipe (500) can be mixed in the receiving space (S) of the housing (30).

[0237] FIG. 16 is a perspective view illustrating some components of a compressor according to one embodiment of the present disclosure, such as a rotating shaft, an upper cylinder, a lower cylinder, an upper cylinder cover, a lower cylinder cover, a separate muffler, a connecting muffler, and a lower muffler. FIG. 17 is a diagram illustrating a state in which refrigerant from a lower muffler chamber of a compressor according to one embodiment of the present disclosure flows into a connecting muffler chamber and is discharged through a second discharge hole. FIG. 18 is a diagram illustrating a state in which refrigerant in an upper compression chamber of a compressor according to one embodiment of the present disclosure flows into a separate muffler chamber and is discharged through a first discharge hole.

[0238] When describing the configurations of a compressor (11) according to an embodiment of the present disclosure with reference to FIGS. 16 to 18, configurations corresponding to those in the embodiment described with reference to FIGS. 1 to 9 may be given the same drawing reference numerals and descriptions thereof may be omitted.

[0239] Referring to FIGS. 16 to 18, a compressor (11) according to one embodiment of the present disclosure may include an upper muffler (3300) including a separate muffler chamber (3301) configured to reduce noise of refrigerant discharged from an upper compression chamber (111), and a lower muffler (400) including a lower muffler chamber (401) configured to reduce noise of refrigerant discharged from a lower compression chamber (211). The refrigerant in the lower muffler chamber (401) may move toward the upper muffler (3300) through a connecting passage (FC). The upper muffler (3300) may include a connecting muffler chamber (3302) connected to the lower muffler chamber (401).

[0240] The path through which the refrigerant is discharged from the upper compression chamber (111) and the path through which the refrigerant is discharged from the lower compression chamber (211) can be separated from each other. The separate muffler chamber (3301) can be separated from the path (F) provided to discharge the refrigerant within the lower muffler chamber (401). Specifically, the separate muffler chamber (3301) and the connecting muffler chamber (3302) can be separated from each other.

[0241] The upper muffler (3300) may include a separate muffler (3310) and a connecting muffler (3320).

[0242] A separation muffler (3310) can cover the upper side of a separation muffler chamber (3301). The separation muffler chamber (3301) can be formed between the separation muffler (3310) and the connection muffler (3320). Specifically, the separation muffler (3310) can include a first space forming portion (3311) that covers the upper side of the upper inlet hole (131b), and the separation muffler chamber (3301) can be formed between the first space forming portion (3311) and the connection muffler (3320). The separation muffler (3310) can include a first coupling portion (3313), and the first space forming portion (3311) can have a shape that protrudes upward from the first coupling portion (3313). The first coupling portion (3313) is in contact with the second coupling portion (3323) of the connecting muffler (3320) and can be coupled to the second coupling portion (3323).

[0243] The connecting muffler (3320) can cover the upper side of the connecting muffler room (3302). The connecting muffler room (3302) can be formed between the connecting muffler (3320) and the upper cylinder cover (130). Specifically, the connecting muffler (3320) can include a second space forming portion (3321) that covers the upper side of the connecting passage (FC), the connecting hole, or the upper cover hole (131c), and the connecting muffler room (3302) can be formed between the second space forming portion (3321) and the upper cylinder cover (130). The connecting muffler (3320) can include a second coupling portion (3323) that is in contact with the upper cover body (131) and is coupled to the upper cover body (131), and the second space forming portion (3321) can have a shape that protrudes upward from the second coupling portion (3323).

[0244] The second space forming portion (3321) can be in contact with the first shaft support portion (132) of the upper cylinder cover (130). For example, a hole can be formed in the center of the second space forming portion (3321), and the hole of the second space forming portion (3321) can be penetrated by the first shaft support portion (132). The outer circumferential surface of the first shaft support portion (132) can be in contact with the periphery of the hole of the second space forming portion (3321).

[0245] The first space forming portion (3311) and the second space forming portion (3321) may be in contact with each other. For example, a hole may be formed in the center of the first space forming portion (3311), and at least a portion of the second space forming portion (3321) may penetrate the hole of the first space forming portion (3311). At least a portion of the outer surface of the second space forming portion (3321) may be in contact with the periphery of the hole of the first space forming portion (3311).

[0246] For example, the first coupling portion (3313) can cover the second coupling portion (3323) from the upper side.

[0247] A muffler hole (3324) connecting the upper inlet hole (131b) and the separate muffler chamber (3301) may be formed in the second connecting portion (3323). The muffler hole (3324) may correspond to at least the upper inlet hole (131b). As illustrated in FIGS. 17 and 18, the muffler hole (3324) may correspond to the upper cover groove (131a). The muffler hole (3324) may be covered by the first space forming portion (3311). As the muffler hole (3324) is formed in the second connecting portion (3323), as illustrated in FIG. 18, the refrigerant discharged from the upper compression chamber (111) through the upper inlet hole (131b) may flow into the separate muffler chamber (3301) through the muffler hole (3324).

[0248] The muffler hole (3324) can be partitioned from the connecting muffler room (3302) by the second space forming part (3321).

[0249] By the structure of the separation muffler (3310) and the connection muffler (3320), the separation muffler room (3301) and the connection muffler room (3302) can be separated from each other.

[0250] As illustrated in FIGS. 16 to 18, the separation muffler (3310) and the connection muffler (3320) may be coupled to each other. For example, the separation muffler (3310) and the connection muffler (3320) may be coupled to each other by a fastening member such as a screw. Alternatively, the separation muffler (3310) and the connection muffler (3320) may be formed integrally with each other.

[0251] The refrigerant within the separated muffler chamber (3301) can be discharged through the first discharge hole (3312). The first discharge hole (3312) can be formed in the separated muffler (3310). The path through which the refrigerant is discharged from the upper compression chamber (111) can extend from the upper compression chamber (111) through the separated muffler chamber (3301) to the first discharge hole (3312). For example, the first discharge hole (3312) can be provided so that the refrigerant within the separated muffler chamber (3301) is discharged in a vertical direction. Alternatively, the first discharge hole (3312) can be provided so that the refrigerant within the separated muffler chamber (3301) is discharged in a horizontal direction or in a direction inclined at a predetermined angle with respect to the horizontal direction.

[0252] The first discharge hole (3312) may be formed in the first space forming portion (3311). For example, the first discharge hole (3312) may be formed on the upper surface of the first space forming portion (3311).

[0253] The upper inlet hole (131b) and the first discharge hole (3312) may be arranged horizontally apart from each other. The refrigerant introduced into the separation muffler chamber (3301) through the upper inlet hole (131b) may move not only vertically but also horizontally and be discharged through the first discharge hole (3312). This may further enhance the noise reduction efficiency of the refrigerant.

[0254] For example, the first discharge hole (3312) may be provided in multiples. Alternatively, the first discharge hole (3312) may be provided in singles.

[0255] The refrigerant within the connecting muffler chamber (3302) can be discharged through the second discharge hole (3322). The second discharge hole (3322) can be formed in the connecting muffler (3320). A path (F) through which the refrigerant is discharged from the lower muffler chamber (401) can extend from the lower muffler chamber (401) through the connecting muffler chamber (3302) to the second discharge hole (3322). For example, the second discharge hole (3322) can be provided so that the refrigerant within the connecting muffler chamber (3302) is discharged upward. Alternatively, the second discharge hole (3322) can be provided so that the refrigerant within the connecting muffler chamber (3302) is discharged horizontally or in a direction inclined at a predetermined angle with respect to the horizontal direction.

[0256] The second exhaust hole (3322) may be formed in the second space forming portion (3321). For example, the second exhaust hole (3322) may be formed in at least a portion of the second space forming portion (3322) penetrating the first space forming portion (3311). The second exhaust hole (3322) may be positioned above the first space forming portion (3311). For example, the second exhaust hole (3322) may be formed on the upper surface of the second space forming portion (3321).

[0257] The second discharge hole (3322) may be formed between the first shaft support member (132) and the connecting muffler (3320). The second discharge hole (3322) may be formed in the space between the periphery of the hole of the second space forming member (3321) and the outer surface of the first shaft support member (132) penetrating therethrough.

[0258] The connecting holes, such as the upper cover hole (131c), and the second discharge hole (3322) may be arranged horizontally apart from each other. The refrigerant introduced into the connecting muffler chamber (3302) through the connecting hole may move not only vertically but also horizontally and be discharged through the second discharge hole (3322). This may further enhance the noise reduction efficiency of the refrigerant.

[0259] For example, the second discharge hole (3322) may be provided in multiples. Alternatively, the second discharge hole (3322) may be provided in singles.

[0260] As illustrated in FIGS. 16 to 18, the second discharge hole (3322) may be arranged adjacent to the rotary shaft (43). The first discharge hole (3312) may be arranged relatively far from the rotary shaft (43). That is, the distance between the rotary shaft (43) and the first discharge hole (3312) may be longer than the distance between the rotary shaft (43) and the second discharge hole (3322).

[0261] By this structure, the refrigerant compressed in the upper compression chamber (111) can be introduced into the separate muffler chamber (3301) of the upper muffler (3300) through the upper inlet hole (131b), and the flow rate of the refrigerant within the separate muffler chamber (3301) can be reduced. The refrigerant within the separate muffler chamber (3301) can be discharged from the separate muffler chamber (3301) through the first discharge hole (3312) formed in the separate muffler (3310).

[0262] In addition, the refrigerant compressed in the lower compression chamber (211) can be introduced into the lower muffler chamber (401) of the lower muffler (400) through the lower inlet hole (231b), and the flow rate of the refrigerant can be reduced within the lower muffler chamber (401). The refrigerant within the lower muffler chamber (401) can be introduced into the connecting muffler chamber (3302) partitioned from the separate muffler chamber (3301) through the connecting passage (FC), and the flow rate of the refrigerant can be reduced once again within the connecting muffler chamber (3302). The refrigerant within the connecting muffler chamber (3302) can be discharged from the connecting muffler chamber (3302) through the second discharge hole (3322) formed in the connecting muffler (3320).

[0263] In this way, by the structure of the upper muffler (3300) according to one embodiment, the flow path of the refrigerant discharged from the upper compression chamber (111) and the flow path of the refrigerant discharged from the lower compression chamber (211) can be separated from each other.

[0264] The refrigerant discharged from the separation muffler (3310) through the first discharge hole (3312) and the refrigerant discharged from the connection muffler (3320) through the second discharge hole (3322) can be mixed at the upper side of the separation muffler (3310). The refrigerant discharged from the separation muffler (3310) through the first discharge hole (3312) and the refrigerant discharged from the connection muffler (3320) through the second discharge hole (3322) can be mixed in the receiving space (S) of the housing (30).

[0265] According to one embodiment of the present disclosure, a compressor may include a lower cylinder including a lower compression chamber provided to compress refrigerant therein, an upper cylinder including an upper compression chamber provided to compress refrigerant therein, a lower muffler disposed below the lower compression chamber and provided to reduce noise of refrigerant discharged from the lower compression chamber, and a separation muffler disposed above the upper cylinder and provided to reduce noise of refrigerant discharged from the upper compression chamber. The separation muffler may be defined by a passage extending upward from the lower muffler and provided to discharge refrigerant within the lower muffler.

[0266] The above compressor may further include a connecting muffler connected to the interior of the lower muffler and separated from the separating muffler.

[0267] The above-described separation muffler may include a first discharge hole through which the refrigerant within the separation muffler is discharged. The above-described connection muffler may include a second discharge hole through which the refrigerant within the connection muffler is discharged. The flow path may extend from the lower muffler through the interior of the connection muffler to the second discharge hole.

[0268] The compressor may further include a lower roller rotatably provided inside the lower cylinder and configured to compress refrigerant within the lower compression chamber as it rotates, an upper roller rotatably provided inside the upper cylinder and configured to compress refrigerant within the upper compression chamber as it rotates, and a rotary shaft provided to provide power to the lower roller and the upper roller. A distance between the rotary shaft and the first discharge hole may be shorter than a distance between the rotary shaft and the second discharge hole.

[0269] The compressor may further include a lower roller rotatably provided inside the lower cylinder and configured to compress refrigerant within the lower compression chamber as it rotates, an upper roller rotatably provided inside the upper cylinder and configured to compress refrigerant within the upper compression chamber as it rotates, and a rotary shaft provided to provide power to the lower roller and the upper roller. A distance between the rotary shaft and the first discharge hole may be longer than a distance between the rotary shaft and the second discharge hole.

[0270] The first discharge hole may be formed so that the refrigerant within the separation muffler is discharged upward through the first discharge hole. The second discharge hole may be formed so that the refrigerant within the connection muffler is discharged upward through the second discharge hole.

[0271] The first discharge hole may be formed so that the refrigerant within the separation muffler is discharged in a horizontal direction or in a direction inclined at a predetermined angle with respect to the horizontal direction through the first discharge hole. The second discharge hole may be formed so that the refrigerant within the connection muffler is discharged in a horizontal direction or in a direction inclined at a predetermined angle with respect to the horizontal direction through the second discharge hole.

[0272] The compressor may further include a connecting hole through which refrigerant from the lower muffler flows into the connecting muffler. The connecting hole and the second discharge hole may be arranged to be spaced apart from each other in the horizontal direction.

[0273] The above-mentioned euro can pass between the above-mentioned separating muffler and the above-mentioned connecting muffler.

[0274] The above separation muffler and the above connection muffler can be combined with each other.

[0275] The compressor may further include an upper inlet hole through which the refrigerant within the upper compression chamber is introduced into the separating muffler. The separating muffler may further include an exhaust hole through which the refrigerant within the separating muffler is discharged. The upper inlet hole and the exhaust hole may be arranged to be spaced apart from each other in the horizontal direction.

[0276] The compressor may further include a discharge pipe configured to discharge refrigerant within the lower muffler upward. The flow path may extend from the lower muffler toward the discharge pipe.

[0277] The compressor may further include an upper cylinder cover covering the upper side of the upper compression chamber and including an upper cover hole. The discharge pipe may extend upward from the upper cover hole.

[0278] The above discharge pipe can pass through the above separation muffler.

[0279] The above separating muffler may include a discharge hole provided to discharge refrigerant from the upper compression chamber. The compressor may be configured such that the refrigerant discharged through the discharge hole and the refrigerant discharged through the passage are mixed at the upper side of the separating muffler.

[0280] According to one embodiment of the present disclosure, a compressor may include a lower cylinder including a lower compression chamber provided to compress refrigerant therein, an upper cylinder including an upper compression chamber provided to compress refrigerant therein, a lower muffler provided to reduce noise of refrigerant discharged from the lower compression chamber and disposed on a lower side of the lower cylinder, and an upper muffler provided to reduce noise of refrigerant discharged from the lower compression chamber, and an upper muffler provided on an upper side of the upper cylinder. The upper muffler may include a separation muffler provided to reduce noise of refrigerant discharged from the upper compression chamber, and a connection muffler connected to the lower muffler and partitioned from the separation muffler.

[0281] The above separation muffler may include a first discharge hole provided to discharge refrigerant within the separation muffler that has flowed in from the upper compression chamber. The above connection muffler may include a second discharge hole provided to discharge refrigerant within the connection muffler that has flowed in from the lower muffler.

[0282] The compressor may further include an upper roller rotatably provided inside the upper cylinder and configured to compress refrigerant in the upper compression chamber as it rotates, a rotary shaft provided to provide power to the upper roller, and a shaft support portion supporting the rotary shaft, and an upper cylinder cover covering an upper side of the upper compression chamber. The rotary shaft may penetrate the shaft support portion and the connecting muffler. The first discharge hole may be formed between the shaft support portion and the connecting muffler.

[0283] According to one embodiment of the present disclosure, a compressor may include a lower cylinder including a lower compression chamber provided to compress refrigerant therein, an upper cylinder including an upper compression chamber provided to compress refrigerant therein, a lower muffler provided to reduce noise of refrigerant discharged from the lower compression chamber and disposed on a lower side of the lower cylinder, a discharge pipe provided to discharge refrigerant in the lower muffler upward, and an upper muffler provided on an upper side of the upper cylinder, wherein the upper muffler is provided to reduce noise of refrigerant discharged from the upper compression chamber and is partitioned from the discharge pipe.

[0284] The compressor may further include an upper cylinder cover that covers the upper compression chamber from the upper side and includes an upper cover hole. The discharge pipe may extend upward from the upper cover hole.

[0285] According to the idea of ​​the present disclosure, the path through which the refrigerant is discharged from the lower muffler chamber and the upper muffler chamber are partitioned from each other, so that the discharge path of the refrigerant compressed in the upper cylinder and the discharge path of the refrigerant compressed in the lower cylinder can be separated from each other.

[0286] According to the idea of ​​the present disclosure, a separate muffler chamber connected to the upper compression chamber and a connecting muffler chamber connected to the lower muffler chamber are partitioned from each other, so that the discharge path of the refrigerant compressed in the upper cylinder and the discharge path of the refrigerant compressed in the lower cylinder can be separated from each other.

[0287] According to the idea of ​​the present disclosure, the discharge pipes for discharging the refrigerant in the upper muffler chamber and the lower muffler chamber connected to the upper compression chamber are partitioned from each other, so that the discharge path of the refrigerant compressed in the upper cylinder and the discharge path of the refrigerant compressed in the lower cylinder can be separated from each other.

[0288] According to the idea of ​​the present disclosure, the discharge path of the refrigerant compressed in the upper cylinder and the discharge path of the refrigerant compressed in the lower cylinder are separated from each other, thereby preventing interference in the flow between the refrigerants and pressure drop caused by the interference.

[0289] According to the idea of ​​the present disclosure, the discharge path of the refrigerant compressed in the upper cylinder and the discharge path of the refrigerant compressed in the lower cylinder are separated from each other, so that some of the discharged refrigerant can be prevented from flowing backward.

[0290] The effects according to the idea of ​​the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the description below.

[0291] The above illustrates and describes specific embodiments. However, the invention is not limited to the above-described embodiments, and those skilled in the art will readily appreciate that various modifications and implementations can be made without departing from the spirit and scope of the invention as set forth in the claims below.

Claims

1. A lower cylinder including a lower compression chamber, wherein the lower compression chamber is configured such that refrigerant is compressed within the lower compression chamber and the compressed refrigerant within the lower compression chamber is discharged from the lower compression chamber; An upper cylinder including an upper compression chamber, wherein the upper compression chamber is configured such that refrigerant is compressed within the upper compression chamber and the compressed refrigerant within the upper compression chamber is discharged from the upper compression chamber; A lower muffler arranged at the lower side of the lower compression chamber, configured to transmit refrigerant discharged from the lower compression chamber and reduce noise of the refrigerant, and configured to discharge the refrigerant transmitted from the lower compression chamber and with reduced noise into the receiving space of the compressor; and A separation muffler is disposed on the upper side of the upper compression chamber, configured to transmit refrigerant discharged from the upper compression chamber and reduce noise of the refrigerant, and configured to discharge the refrigerant transmitted from the upper compression chamber and with reduced noise into the receiving space; The above separation muffler is a compressor in which a passage extends upward from the lower muffler and is separated from a passage along which refrigerant discharged from the lower muffler flows, such that the refrigerant discharged from the lower muffler flows along the passage before reaching the receiving space and is separated from the refrigerant discharged from the separation muffler.

2. In paragraph 1, A compressor further comprising a connecting muffler connected to the interior of the lower muffler and separated from the separating muffler.

3. In paragraph 2, The above separation muffler includes a first discharge hole through which refrigerant is discharged from the separation muffler to the receiving space, The above connecting muffler includes a second discharge hole through which refrigerant is discharged from the connecting muffler to the receiving space, A compressor in which the above-mentioned euro extends from the lower muffler through the interior of the connecting muffler to the second discharge hole.

4. In paragraph 3, rotating shaft; A lower roller arranged within the lower cylinder and configured to rotate by the rotation of the rotating shaft to compress the refrigerant within the lower compression chamber and discharge the compressed refrigerant within the lower compression chamber; and Further comprising an upper roller arranged within the upper cylinder and configured to rotate by the rotation of the rotating shaft so as to compress the refrigerant within the upper compression chamber and discharge the compressed refrigerant within the upper compression chamber; A compressor wherein the distance between the rotating shaft and the first discharge hole is shorter than the distance between the rotating shaft and the second discharge hole.

5. In paragraph 3, rotating shaft; A lower roller arranged within the lower cylinder and configured to rotate by the rotation of the rotating shaft to compress the refrigerant within the lower compression chamber and discharge the compressed refrigerant within the lower compression chamber; and Further comprising an upper roller arranged within the upper cylinder and configured to rotate by the rotation of the rotating shaft so as to compress the refrigerant within the upper compression chamber and discharge the compressed refrigerant within the upper compression chamber; A compressor wherein the distance between the rotating shaft and the first discharge hole is longer than the distance between the rotating shaft and the second discharge hole.

6. In paragraph 3, The above first discharge hole is configured so that the refrigerant from the separation muffler is discharged upward through the first discharge hole, The above second discharge hole is a compressor configured such that the refrigerant is discharged upward through the second discharge hole from the connecting muffler.

7. In paragraph 3, The first discharge hole is configured such that the refrigerant from the separation muffler is discharged in a first direction that is horizontal or inclined at a predetermined first angle with respect to the horizontal direction through the first discharge hole, The second discharge hole is configured to discharge the refrigerant from the connecting muffler in a second direction that is horizontal or inclined at a second angle with respect to the horizontal direction through the second discharge hole, wherein the second discharge hole is configured to discharge the refrigerant from the connecting muffler in a second direction that is horizontal or inclined at a second angle with respect to the horizontal direction.

8. In paragraph 3, Further comprising a connecting hole provided so that the refrigerant from the lower muffler flows along the path from the lower muffler and flows into the connecting muffler; A compressor in which the above connecting hole and the second discharge hole are arranged horizontally apart from each other.

9. In paragraph 2, A compressor wherein the above-mentioned euro extends between the above-mentioned separating muffler and the above-mentioned connecting muffler.

10. In paragraph 2, A compressor in which the above-mentioned separation muffler and the above-mentioned connection muffler are coupled to each other.

11. In paragraph 1, Further comprising an upper cylinder cover that includes an upper inlet hole through which the compressed refrigerant in the upper compression chamber is discharged to the separation muffler and covers the upper side of the upper cylinder; The above separation muffler includes a discharge hole through which refrigerant delivered from the upper compression chamber and with reduced noise is discharged, A compressor in which the upper inlet hole and the discharge hole are arranged horizontally apart from each other.

12. In paragraph 1, A compressor further comprising a discharge pipe configured to extend the above-described refrigerant and discharge the refrigerant upward from the lower muffler.

13. In paragraph 12, Further comprising an upper cylinder cover disposed on the upper side of the upper compression chamber and including an upper cover hole; The above discharge pipe is a compressor extending upward from the upper cover hole.

14. In paragraph 12, The above discharge pipe is a compressor that passes through the above separation muffler.

15. In paragraph 1, The above-mentioned accommodation space is located on the upper side of the above-mentioned separation muffler, The above separation muffler includes a discharge hole through which the refrigerant delivered from the upper compression chamber and with reduced noise is discharged into the receiving space, A compressor configured such that the refrigerant discharged through the discharge hole and the refrigerant discharged along the passage from the lower muffler are mixed in the receiving space.

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