Compressor

Abstract

This compressor comprises: a case including an inlet and an outlet; a scroll compression unit including a fixed scroll provided inside the case, and an orbiting scroll that orbits with respect to the fixed scroll; and a rotary compression unit including a cylinder provided inside the case, and a roller for rotating along the inner wall of the cylinder inside the cylinder. The case, the scroll compression unit, and the rotary compression unit are provided such that a refrigerant flowing into the case through the inlet passes through the scroll compression unit, then passes through the rotary compression unit and is discharged to the outside of the case through the outlet.

Description

compressor

[0001] The present disclosure relates to a compressor having an improved structure.

[0002] A compressor is a mechanical device that receives power from a power generation device, such as an electric motor or turbine, and compresses air, refrigerants, or various other working gases to increase their pressure. Compressors are widely used in home appliances, such as refrigerators, air conditioners, and clothes dryers, as well as across various industries. Types of compressors include reciprocating compressors, scroll compressors, and rotary compressors.

[0003] A reciprocating compressor compresses the working gas by forming a compression space between the piston and the cylinder where the working gas is drawn in and discharged, allowing the piston to reciprocate in a straight line inside the cylinder.

[0004] A scroll compressor compresses the working gas as the rotating scroll rotates along the stationary scroll by forming a compression space between the rotating scroll and the stationary scroll where the working gas is drawn in and discharged.

[0005] A rotary compressor compresses the working gas as the roller rotates eccentrically along the inner wall of the cylinder by forming a compression space between the eccentrically rotating roller and the cylinder, where the working gas is drawn in and discharged.

[0006] One aspect of the present disclosure provides a two-stage compressor comprising a scroll compressor and a rotary compressor.

[0007] One aspect of the present disclosure provides a compressor that primarily compresses a refrigerant through a scroll compression section and secondarily compresses a refrigerant through a rotary compression section.

[0008] The technical problems to be solved in this document are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art to which this invention belongs from the description below.

[0009] Various aspects of the embodiments of the present disclosure are, in some cases, described in the following description, in others become obvious from the description or can be understood through the practice of the presented embodiments.

[0010] According to one embodiment of the present disclosure, a compressor comprises a case including an inlet and an outlet, a scroll compressor including a fixed scroll provided inside the case and a rotary scroll provided to pivot relative to the fixed scroll, and a rotary compressor including a cylinder provided inside the case and a roller provided to rotate along the inner wall of the cylinder inside the cylinder. The case, the scroll compressor, and the rotary compressor are arranged so that a refrigerant introduced into the case through the inlet passes through the scroll compressor, passes through the rotary compressor, and is discharged to the outside of the case through the outlet.

[0011] A compressor according to the concept of the present disclosure comprises a case including an inlet and an outlet, a scroll compressor including a fixed scroll provided inside the case and a pivoting scroll provided to pivot relative to the fixed scroll, and a rotary compressor including a cylinder provided inside the case and a roller provided to rotate along the inner wall of the cylinder inside the cylinder. With respect to a refrigerant flow path extending from the inlet to the outlet, the scroll compressor is positioned upstream of the rotary compressor.

[0012] These and / or other aspects of the present disclosure will become clear and more easily understood from the detailed description of the embodiments described together with reference to the drawings below.

[0013] FIG. 1 is a refrigerant flow path diagram of a refrigeration cycle device according to one embodiment of the present disclosure.

[0014] FIG. 2 is a perspective view illustrating a compressor according to one embodiment of the present disclosure.

[0015] FIG. 3 is a cross-sectional view of a compressor according to one embodiment of the present disclosure.

[0016] FIG. 4 is an exploded view of a part of a compressor according to one embodiment of the present disclosure.

[0017] FIG. 5 is an exploded view of a scroll compression section according to one embodiment of the present disclosure.

[0018] FIG. 6 is an exploded view of a scroll compression section according to one embodiment of the present disclosure.

[0019] FIG. 7 is an exploded view of a rotary compression section according to one embodiment of the present disclosure.

[0020] FIG. 8 is a cross-sectional view of a compressor according to one embodiment of the present disclosure.

[0021] Figure 9 is an enlarged view of area A shown in Figure 8.

[0022] FIG. 10 is a drawing showing an enlarged view of a portion of a cross-section of a compressor according to one embodiment of the present disclosure.

[0023] FIG. 11 is a cross-sectional view of a compressor according to one embodiment of the present disclosure.

[0024] FIG. 12 is a cross-sectional view of a compressor according to one embodiment of the present disclosure.

[0025] FIG. 13 is a refrigerant flow path diagram of a refrigeration cycle device according to one embodiment of the present disclosure.

[0026] FIG. 14 is a cross-sectional view of a compressor according to one embodiment of the present disclosure.

[0027] FIG. 15 is a cross-sectional view of a compressor according to one embodiment of the present disclosure.

[0028] The various embodiments of the present disclosure and the terms used therein are not intended to limit the technical features described in the present disclosure to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments.

[0029] In relation to the description of the drawings, similar reference numerals may be used for similar or related components.

[0030] The singular form of the noun corresponding to the item may include one or multiple items, unless the relevant context clearly indicates otherwise.

[0031] In the present disclosure, each of the phrases such as “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 the corresponding phrase, or all possible combinations thereof.

[0032] The term “and / or” includes a combination of multiple related described components or any of the multiple related described components.

[0033] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish a component from another component and do not limit the components in other aspects (e.g., importance or order).

[0034] Terms such as “include” or “have” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in this disclosure, and do not preclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0035] When it is said that a component is "connected," "combined," "supported," or "in contact" with another component, this includes not only cases where the components are directly connected, combined, supported, or in contact, but also cases where they are indirectly connected, combined, supported, or in contact through a third component.

[0036] When it is said that a component is located "on" another component, this includes not only cases where one component is in contact with the other, but also cases where another component exists between the two components.

[0037] Additionally, terms such as 'front,' 'rear,' 'top,' 'bottom,' 'side,' 'left,' 'right,' 'top,' and 'bottom' used in this disclosure are defined based on the drawings, and the shape and location of each component are not limited by these terms.

[0038] Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings.

[0039] FIG. 1 is a refrigerant flow path diagram of a refrigeration cycle device according to one embodiment.

[0040] Referring to FIG. 1, a refrigeration cycle device may include a compressor (1), a condenser (2), an expansion device (3), and an evaporator (4). The compressor (1), condenser (2), expansion device (3), and evaporator (4) may form a closed cycle.

[0041] A compressor (1) may be provided to compress a refrigerant. The gaseous refrigerant, compressed to high temperature and high pressure in the compressor (1), may pass through a condenser (2), an expansion device (3), and an evaporator (4) in sequence and then flow back into the compressor (1).

[0042] A condenser (2) may be provided to condense the refrigerant discharged from the compressor (1). The high-temperature and high-pressure gaseous refrigerant discharged from the compressor (1) may pass through the condenser (2), release heat to the outside, raise the external temperature, and be liquefied.

[0043] The expansion device (3) may be provided to expand the refrigerant discharged from the condenser (2). As the refrigerant discharged from the condenser (2) passes through the expansion device (3), its density and pressure may be significantly reduced. Accordingly, the refrigerant may become a saturated vapor with a reduced pressure, making it easy to evaporate in the evaporator (4).

[0044] The evaporator (4) may be provided to evaporate the refrigerant flowing in from the expansion device (3). The refrigerant discharged from the expansion device (3) may pass through the evaporator (4), absorb heat from the outside to lower the external temperature, and vaporize.

[0045] The refrigerant discharged from the evaporator (4) may be in a gaseous state at low temperature and low pressure. The refrigerant discharged from the evaporator (4) may be compressed into a high temperature and high pressure state by flowing back into the compressor (1).

[0046] A refrigeration cycle device may include a plurality of transfer pipes for connecting a compressor (1), a condenser (2), an expansion device (3), and an evaporator (4) to each other. Each of the plurality of transfer pipes may be provided to transfer refrigerant. Specifically, the plurality of transfer pipes may include a first transfer pipe (P1) connecting the compressor (1) and the condenser (2), a second transfer pipe (P2) connecting the condenser (2) and the expansion device (3), a third transfer pipe (P3) connecting the expansion device (3) and the evaporator (4), and a fourth transfer pipe (P4) connecting the evaporator (4) and the compressor (1).

[0047] FIG. 2 is a perspective view illustrating a compressor according to one embodiment. FIG. 3 is a cross-sectional view of a compressor according to one embodiment. FIG. 4 is an exploded view of a part of a compressor according to one embodiment. FIG. 5 is an exploded view of a scroll compression unit according to one embodiment. FIG. 6 is an exploded view of a scroll compression unit according to one embodiment. FIG. 7 is an exploded view of a rotary compression unit according to one embodiment.

[0048] Referring to FIGS. 2 through 7, the compressor (1) may include a case (10). The case (10) may form a receiving space (S) for accommodating various components of the compressor (1). In other words, the case (10) may form a receiving space (S) for accommodating a refrigerant.

[0049] The case (10) may be provided to accommodate oil. That is, oil may be stored within the receiving space (S). The oil may reduce friction between the various components of the compressor (1). Additionally, the oil may lubricate the various components of the compressor (1).

[0050] The case (10) may include a main body (11). The main body (11) may be provided in a roughly hollow cylindrical shape. The main body (11) may be extended in the vertical direction. However, there are no special restrictions on the shape of the main body (11).

[0051] The case (10) may include a top cover (12). The top cover (12) may be provided on the upper side of the main body (11). The top cover (12) may cover the upper side of the main body (11). The top cover (12) may be coupled with the main body (11).

[0052] The case (10) may include a base (13). The base (13) may be provided on the lower side of the main body (11). The base (13) may be coupled to the main body (11). The base (13) may support the main body (11) and the top cover (12).

[0053] The case (10) may include an inlet (14). The inlet (14) may be provided to introduce refrigerant. That is, refrigerant outside the case (10) may be introduced into a receiving space (S) inside the case (10) through the inlet (14). Specifically, refrigerant discharged from the evaporator (4, see FIG. 1) may be provided to be introduced into the compressor (1) through the inlet (14). For example, the inlet (14) may be formed in the top cover (12) of the case (10).

[0054] The case (10) may include an outlet (15). The outlet (15) may be provided to discharge refrigerant. That is, refrigerant contained in the receiving space (S) inside the case (10) may be discharged to the outside of the case (10) through the outlet (15). Specifically, the refrigerant discharged through the outlet (15) may be provided to flow to a condenser (2, see FIG. 1). For example, the outlet (15) may be formed in the main body (11) of the case (10).

[0055] The compressor (1) may include a frame (20). The frame (20) may be provided to partition the internal space of the case (10). In other words, the frame (20) may be provided to partition the receiving space (S) inside the case (10).

[0056] The frame (20) can divide the receiving space (S) into a first receiving space (S1) and a second receiving space (S2). Specifically, the first receiving space (S1) and the second receiving space (S2) can be divided vertically. For example, the first receiving space (S1) can be provided above the second receiving space (S2).

[0057] An inlet (14) may be formed on one side wall of a case (10) that forms a first receiving space (S1). Specifically, a refrigerant supplied from outside the case (10) may flow into the first receiving space (S1) through the inlet (14), the inlet pipe (40) to be described later, and the scroll compression unit (100).

[0058] An outlet (15) may be formed on one side wall of the case (10) forming the second receiving space (S2). The outlet (15) may be in communication with the second receiving space (S2). Specifically, the refrigerant inside the second receiving space (S2) may be discharged to the outside of the case (10) through the outlet (15) and the discharge pipe (50) to be described later.

[0059] The compressor (1) may include a scroll compression section (100). The scroll compression section (100) may be a device configured to compress a refrigerant through a fixed scroll (110) and a rotating scroll (120). The scroll compression section (100) may form a first compression space (C1) for compressing the refrigerant.

[0060] The scroll compression unit (100) may be provided inside the case (10). In other words, the scroll compression unit (100) may be accommodated in a receiving space (S). For example, the scroll compression unit (100) may be accommodated in a first receiving space (S1).

[0061] The scroll compression unit (100) may be configured to discharge compressed refrigerant into the first receiving space (S1). That is, the first receiving space (S1) may be configured to receive the refrigerant discharged by the scroll compression unit (100).

[0062] The scroll compression unit (100) can be combined with the frame (20). For example, the scroll compression unit (100) can be screw-coupled with the frame (20). However, the method of combining the scroll compression unit (100) and the frame (20) is not limited to this.

[0063] The scroll compression unit (100) may include a fixed scroll (110). The fixed scroll (110) may be provided inside the case (10). That is, the fixed scroll (110) may be accommodated in a receiving space (S). For example, the fixed scroll (110) may be accommodated in a first receiving space (S1). The fixed scroll (110) may be fixed inside the case (10).

[0064] The fixed scroll (110) may include a scroll body (111). The scroll body (111) may form the overall appearance of the fixed scroll (110).

[0065] The fixed scroll (110) may include a fixed wrap (112). The fixed wrap (112) may be formed protruding from the bottom surface of the scroll body (111). The fixed wrap (112) may be formed integrally with the scroll body (111). The fixed wrap (112) may be formed in a roughly spiral shape.

[0066] The fixed scroll (110) may include a first refrigerant inlet hole (113). The first refrigerant inlet hole (113) may be provided to introduce refrigerant into the scroll compression unit (100). The refrigerant introduced into the scroll compression unit (100) through the first refrigerant inlet hole (113) may be compressed by the scroll compression unit (100).

[0067] The first refrigerant inlet hole (113) may be provided in the scroll body (111). For example, the first refrigerant inlet hole (113) may be provided on the upper surface of the scroll body (111). The first refrigerant inlet hole (113) may be in communication with the first compression space (C1). An inlet pipe (40), which will be described later, may be connected to the first refrigerant inlet hole (113).

[0068] The fixed scroll (110) may include a refrigerant discharge hole (114). The refrigerant discharge hole (114) may be provided to discharge refrigerant from the scroll compression unit (100). The refrigerant discharged from the scroll compression unit (100) through the refrigerant discharge hole (114) may flow into the first receiving space (S1).

[0069] A refrigerant discharge hole (114) may be provided in the scroll body (111). For example, the refrigerant discharge hole (114) may be provided on the upper surface of the scroll body (111). The refrigerant discharge hole (114) may be in communication with the first compression space (C1). The refrigerant discharge hole (114) may be in communication with the first receiving space (S1).

[0070] The fixed scroll (110) may include a bypass hole (115). The bypass hole (115) may be provided to bypass the refrigerant introduced into the scroll compression section (100). The bypass hole (115) may be in communication with the first compression space (C1). The bypass hole (115) may be provided in multiple numbers.

[0071] A bypass hole (115) may be provided in the scroll body (111). Specifically, the bypass hole (115) may be provided on the upper surface of the scroll body (111).

[0072] The bypass hole (115) can be opened and closed by a bypass device (130) to be described later. Further details regarding this will be described later.

[0073] The scroll compression unit (100) may include a pivot scroll (120). The pivot scroll (120) may be provided inside the case (10). That is, the pivot scroll (120) may be received in a receiving space (S). For example, the pivot scroll (120) may be received in a first receiving space (S1). The pivot scroll (120) may be provided to be rotatable inside the case (10).

[0074] The pivot scroll (120) can be coupled to the shaft (70) described later. The pivot scroll (120) can rotate as the shaft (70) rotates.

[0075] A pivot scroll (120) may be provided on the lower side of a fixed scroll (110). The pivot scroll (120) may be provided to pivot relative to the fixed scroll (110).

[0076] The pivot scroll (120) may include a first base plate (121). The first base plate (121) may cover the lower side of the scroll body (111).

[0077] The pivot scroll (120) may include a pivot wrap (122). The pivot wrap (122) may be formed protruding from the upper surface of the first base plate (121). The pivot wrap (122) may be formed integrally with the first base plate (121). The pivot wrap (122) may be formed in a roughly swirling shape.

[0078] The pivoting wrap (122) can be engaged with the fixed wrap (112). As the pivoting scroll (120) rotates, the pivoting wrap (122) can rotate while engaged with the fixed wrap (112).

[0079] The pivoting wrap (122) can form a first compression space (C1) together with the scroll body (111), the first base plate (121), and the fixed wrap (112). As the pivoting scroll (120) rotates, the refrigerant contained in the first compression space (C1) can be compressed. Specifically, as the pivoting scroll (120) rotates, the space between the pivoting wrap (122) and the fixed wrap (112) can be contracted, and as a result, the refrigerant contained in the space between the pivoting wrap (122) and the fixed wrap (112) can be gradually compressed. The compressed refrigerant can be discharged through the refrigerant discharge hole (114) of the scroll body (111).

[0080] The pivot scroll (120) may include a shaft coupling portion (123). The shaft coupling portion (123) may extend downward from the first base plate (121). The shaft coupling portion (123) may be rotatably coupled to a shaft (70) to be described later. Specifically, the shaft coupling portion (123) may be rotatably coupled to a first cam (72) of the shaft (70) to be described later. The shaft coupling portion (123) may function as a bearing.

[0081] The scroll compression unit (100) may include a bypass device (130). The bypass device (130) may be configured to bypass the refrigerant flowing into the scroll compression unit (100) by selectively opening and closing a bypass hole (115). Specifically, when the pressure of the first compression space (C1) becomes higher than that of the first receiving space (S1) or a predetermined target pressure due to the refrigerant flowing into the scroll compression unit (100), the bypass device (130) may open the bypass hole (115) to bypass a portion of the refrigerant contained in the first compression space (C1). For example, if the refrigerant introduced into the scroll compression unit (100) contains a large amount of liquid refrigerant and the pressure in the first compression space (C1) becomes higher than that of the first receiving space (S1) or a predetermined target pressure, the bypass device (130) can open the bypass hole (115) to bypass some of the refrigerant contained in the first compression space (C1). Through this configuration, the pressure within the first compression space (C1) can be maintained at a level below a predetermined level.

[0082] A bypass device (130) may be provided on the upper side of a fixed scroll (110). Specifically, the bypass device (130) may be provided on the upper surface of a scroll body (111).

[0083] The bypass device (130) may include a bypass valve (131). The bypass valve (131) may be provided to open and close the bypass hole (115). Specifically, when the pressure of the first compression space (C1) rises above a predetermined level, the bypass valve (131) may be opened due to the pressure of the first compression space (C1). The bypass valve (131) may be provided in multiple numbers. The number of bypass valves (131) may correspond to the number of bypass holes (115).

[0084] The bypass device (130) may include a bypass valve stopper (132). The bypass valve stopper (132) may be provided on the upper side of the bypass valve (131). The bypass valve stopper (132) can prevent the bypass valve (131) from moving excessively upward when the bypass valve (131) is opened due to the pressure of the first compression space (C1).

[0085] The compressor (1) may include an Oldham's ring (30). The Oldham's ring (30) may be positioned between the frame (20) and the scroll compression section (100). Specifically, the Oldham's ring (30) may be positioned between the frame (20) and the pivot scroll (120). The Oldham's ring (30) may be provided to allow the pivot scroll (120) to pivot relative to the fixed scroll (110), while preventing it from rotating.

[0086] The compressor (1) may include an inlet pipe (40). The inlet pipe (40) may be provided to introduce refrigerant from outside the compressor (1) into the scroll compression section (100). Specifically, the inlet pipe (40) may be provided to introduce refrigerant discharged from the evaporator (4, see FIG. 1) into the scroll compression section (100).

[0087] The inlet pipe (40) may be provided to pass through the inlet port (14). A fourth transfer pipe (P4) for transferring refrigerant discharged from the evaporator (4, see FIG. 1) may be connected to the inlet pipe (40).

[0088] The inlet pipe (40) can be connected to the scroll compression section (100). Specifically, the inlet pipe (40) can be connected to the first refrigerant inlet hole (113) of the scroll compression section (100). Through this configuration, the inlet pipe (40) can be connected to the first compression space (C1). Additionally, the inlet port (14) can be connected to the first compression space (C1) through the inlet pipe (40).

[0089] The compressor (1) may include a rotary compression section (200). The rotary compression section (200) may be a device configured to compress a refrigerant through a roller (250) configured to rotate within a cylinder (210). The rotary compression section (200) may form a second compression space (C2) for compressing the refrigerant.

[0090] The rotary compression unit (200) can be provided inside the case (10). In other words, the rotary compression unit (200) can be accommodated in a receiving space (S). For example, the rotary compression unit (200) can be accommodated in a second receiving space (S2). That is, the rotary compression unit (200) can be provided below the scroll compression unit (100).

[0091] The rotary compressor (200) may be configured to discharge the compressed refrigerant into the second receiving space (S2). That is, the second receiving space (S2) may be configured to receive the refrigerant discharged by the rotary compressor (200). The refrigerant received in the second receiving space (S2) may be discharged to the outside of the case (10) through the discharge port (15) and the discharge pipe (50) to be described later.

[0092] The rotary compression unit (200) may include a cylinder (210). The cylinder (210) may be provided inside the case (10). That is, the cylinder (210) may be received in a receiving space (S). For example, the cylinder (210) may be received in a second receiving space (S2). The cylinder (210) may be fixed inside the case (10). The cylinder (210) may be provided in a roughly hollow cylindrical shape.

[0093] The cylinder (210) may include a second refrigerant inlet hole (211). The second refrigerant inlet hole (211) may be provided to introduce refrigerant into the rotary compressor (200). The refrigerant introduced into the rotary compressor (200) through the second refrigerant inlet hole (211) may be compressed by the rotary compressor (200).

[0094] The second refrigerant inlet hole (211) may be provided on one side wall of the cylinder (210). The second refrigerant inlet hole (211) may be in communication with the second compression space (C2). The refrigerant discharge portion (320) of the connecting pipe (300), which will be described later, may be connected to the second refrigerant inlet hole (211).

[0095] The rotary compression unit (200) may include a second base plate (220). The second base plate (220) may be provided on the lower side of the cylinder (210). The second base plate (220) may cover the lower side of the cylinder (210).

[0096] The rotary compression unit (200) may include a cylinder cover (230). The cylinder cover (230) may be provided on the upper side of the cylinder (210). The cylinder cover (230) may cover the upper side of the cylinder (210).

[0097] The cylinder cover (230) may include a cover hole (231). The cover hole (231) may communicate with the second compression space (C2) and the interior of the muffler (240) to be described later. Due to this configuration, the refrigerant compressed in the second compression space (C2) can flow into the interior of the muffler (240) through the cover hole (231).

[0098] The cylinder cover (230) may include a shaft support (232). The shaft support (232) may extend upward from the upper surface of the cylinder cover (230). The shaft support (232) may be provided to support a shaft (70) to be described later.

[0099] The rotary compression unit (200) may include a muffler (240). The muffler (240) may be provided on the upper side of the cylinder cover (230). The muffler (240) may cover the upper side of the cylinder cover (230).

[0100] The muffler (240) may be provided to reduce noise generated when the refrigerant compressed in the second compression space (C2) passes through the cylinder (210). Additionally, the muffler (240) may be provided to receive the refrigerant discharged from the second compression space (C2) through the cover hole (231).

[0101] The muffler (240) may include a muffler hole (241). The muffler hole (241) may be provided so that the shaft support (232) of the cylinder cover (230) passes through it.

[0102] A gap may be formed between the muffler hole (241) and the shaft support (232). The refrigerant inside the muffler (240) may be discharged through the gap. The refrigerant discharged through the gap may flow into the second receiving space (S2).

[0103] The cylinder (210), the second base plate (220), the cylinder cover (230), and the muffler (240) can be combined. For example, the cylinder (210), the second base plate (220), the cylinder cover (230), and the muffler (240) can be screw-coupled. However, the method of combining the cylinder (210), the second base plate (220), the cylinder cover (230), and the muffler (240) is not limited thereto.

[0104] The rotary compression unit (200) may include a roller (250). The roller (250) may be provided inside the cylinder (210). The roller (250) may be provided to rotate along the inner wall of the cylinder (210). The roller (250) may be provided in a roughly hollow cylindrical shape.

[0105] The roller (250) can be coupled to the shaft (70) to be described later. Specifically, the roller (250) can be coupled to the second cam (73) of the shaft (70) to be described later. The roller (250) can rotate as the shaft (70) to be described later rotates.

[0106] The rotary compression unit (200) may include a vane (260). The vane (260) may be movably coupled to one side wall of the cylinder (210). Specifically, the vane (260) may be movable along the radial direction of the cylinder (210).

[0107] One end of the vane (260) may come into contact with the roller (250). Through this configuration, the vane (260) may divide the second compression space (C2) into an inlet space (C21) into which refrigerant is introduced and an outlet space (C22) into which the refrigerant is compressed and discharged. The inlet space (C21) may be in communication with the second refrigerant inlet hole (211), and the outlet space (C22) may be in communication with the cover hole (231).

[0108] Although not shown in the drawing, an elastic member may be attached to the other end of the vane (260). Through this configuration, one end of the vane (260) can remain in contact with the roller (250) while the roller (250) is rotating.

[0109] The vane (260) can form a second compression space (C2) together with the cylinder (210), the second base plate (220), the cylinder cover (230), and the roller (250). As the roller (250) rotates, the refrigerant contained in the second compression space (C2) can be compressed. Specifically, as the roller (250) rotates, the refrigerant can be introduced into the inlet space (C21) through the second refrigerant inlet hole (211), and the refrigerant in the discharge space (C22) can be compressed. Additionally, as the roller (250) rotates further, the refrigerant in the discharge space (C22) can be discharged into the second receiving space (S2) by sequentially passing through the cover hole (231) and the interior space of the muffler (240), and the inlet space (C21) can be converted into the discharge space (C22). By repeating the above process, the refrigerant can be continuously compressed.

[0110] The rotary compression unit (200) may include a discharge valve device (270). The discharge valve device (270) may be configured to selectively discharge refrigerant within the second compression space (C2) by selectively opening and closing the cover hole (231). Specifically, when the pressure within the discharge space (C22) of the second compression space (C2) rises above a predetermined level, the discharge valve device (270) may open the cover hole (231) to discharge refrigerant within the second compression space (C2).

[0111] The discharge valve device (270) may be provided on the upper side of the cylinder cover (230). Specifically, the discharge valve device (270) may be provided on the upper surface of the cylinder cover (230).

[0112] The discharge valve device (270) may include a discharge valve (271). The discharge valve (271) may be configured to open and close the cover hole (231). Specifically, when the pressure in the discharge space (C22) rises above a predetermined level, the discharge valve (271) may be opened due to the pressure in the discharge space (C22).

[0113] The discharge valve device (270) may include a discharge valve stopper (272). The discharge valve stopper (272) may be provided on the upper side of the discharge valve (271). The discharge valve stopper (272) can prevent the discharge valve (271) from moving excessively upward when the discharge valve (271) is opened due to pressure in the discharge space (C22).

[0114] The compressor (1) may include a discharge pipe (50). The discharge pipe (50) may be provided to discharge the refrigerant in the second receiving space (S2) to the outside of the compressor (1). Specifically, the discharge pipe (50) may be provided to discharge the refrigerant compressed in the compressor (1) to a condenser (2, see FIG. 1).

[0115] The discharge pipe (50) may be provided to pass through the discharge port (15). In other words, the discharge pipe (50) may be connected to the discharge port (15). Through this configuration, the discharge pipe (50) may be connected to the second receiving space (S2). A first transfer pipe (P1) may be connected to the discharge pipe (50) to transfer the refrigerant discharged from the compressor (1) to the condenser (2, see FIG. 1).

[0116] The compressor (1) may include a drive motor (60). The drive motor (60) may be configured to generate power. The drive motor (60) may convert electromagnetic force into mechanical rotational force.

[0117] The drive motor (60) may be configured to drive at least one of the scroll compression unit (100) and the rotary compression unit (200). For example, the drive motor (60) may be configured to drive both the scroll compression unit (100) and the rotary compression unit (200).

[0118] The drive motor (60) can be provided inside the case (10). In other words, the drive motor (60) can be accommodated in the receiving space (S). Specifically, the drive motor (60) can be accommodated in the second receiving space (S2).

[0119] The drive motor (60) can be positioned between the rotary compression section (200) and the discharge port (15) based on the vertical direction. That is, the rotary compression section (200) can be positioned below the drive motor (60), and the discharge port (15) can be positioned above the drive motor (60). Accordingly, the refrigerant discharged from the rotary compression section (200) can pass through the drive motor (60) and flow toward the discharge port (15). At this time, the drive motor (60) can be cooled by the refrigerant passing through the drive motor (60).

[0120] The drive motor (60) may include a stator (61). The stator (61) may be fixed inside the case (10). The stator (61) may include a stator core and a coil wound on the stator core.

[0121] The drive motor (60) may include a rotor (62). The rotor (62) may be arranged to be rotatable relative to the stator (61). The rotor (62) may include a plurality of magnets.

[0122] In the drawings, an inner rotor type drive motor (60) is illustrated in which the rotor (62) is positioned inside the stator (61), but the present disclosure is not limited thereto. The drive motor (60) may also be an outer rotor type in which the rotor (62) is positioned outside the stator (61). That is, there are no special restrictions on the type of drive motor (60).

[0123] The compressor (1) may include a shaft (70). The shaft (70) may be configured to transmit power generated from the drive motor (60) to at least one of the scroll compression unit (100) and the rotary compression unit (200). For example, the shaft (70) may be configured to transmit power generated from the drive motor (60) to each of the scroll compression unit (100) and the rotary compression unit (200).

[0124] The shaft (70) may be provided to connect at least one of the scroll compression unit (100) and the rotary compression unit (200) with the drive motor (60). For example, the shaft (70) may be provided to connect the drive motor (60) with each of the scroll compression unit (100) and the rotary compression unit (200).

[0125] The shaft (70) may be provided to penetrate some of the components of the compressor (1). For example, the shaft (70) may be provided to penetrate the pivot scroll (120), frame (20), muffler (240), cylinder cover (230), roller (250), second base plate (220), and balance weight (80) to be described later.

[0126] The shaft (70) may include a shaft body (71). The shaft body (71) may extend in an upward and downward direction. The shaft body (71) may be coupled with a rotor (62). The shaft body (71) may be arranged to rotate together with the rotor (62).

[0127] The shaft (70) may include a first cam (72). The first cam (72) may be provided at the top of the shaft body (71). The first cam (72) may have a center axis eccentric from the center axis of the shaft body (71).

[0128] The first cam (72) can be coupled to the shaft coupling portion (123) of the pivot scroll (120). Due to this configuration, the rotational force of the drive motor (60) can be transmitted to the pivot scroll (120). Additionally, since the first cam (72) may have a center axis eccentric from the center axis of the shaft body (71), the pivot scroll (120) can pivot relative to the fixed scroll (110) as the shaft (70) rotates.

[0129] The shaft (70) may include a second cam (73). The second cam (73) may be provided at the bottom of the shaft body (71). The second cam (73) may have a center axis eccentric from the center axis of the shaft body (71).

[0130] The second cam (73) can be coupled with the roller (250). Due to this configuration, the rotational force of the drive motor (60) can be transmitted to the roller (250). Additionally, since the second cam (73) may have a center axis eccentric from the center axis of the shaft body (71), the roller (250) can rotate along the inner wall of the cylinder (210) as the shaft (70) rotates.

[0131] In this document, an embodiment is described in which both the scroll compression unit (100) and the rotary compression unit (200) are driven by only one drive motor (60) and one shaft (70), but the present disclosure is not limited thereto. For example, the scroll compression unit (100) and the rotary compression unit (200) may be driven by different drive motors and may be connected to different shafts.

[0132] The compressor (1) may include a balance weight (80). The balance weight (80) may be positioned above the rotor (62). The balance weight (80) may be provided to regulate rotational imbalance during rotation of the rotor (62).

[0133] FIG. 8 is a cross-sectional view of a compressor according to one embodiment.

[0134] Referring to FIG. 8, the compressor (1) may include a scroll compression section (100) and a rotary compression section (200). That is, the compressor (1) may be a two-stage compressor (1) that includes two compression sections (100, 200) that compress the refrigerant in different ways.

[0135] The compressor (1) can perform a total of two compressions through the scroll compression section (100) and the rotary compression section (200). Therefore, the compressor (1) can easily form a high compression ratio as well as a low compression ratio. In particular, forming a high compression ratio through the compressor (1) may be easier than forming a high compression ratio through any single-stage compressor that includes only one of the scroll compression section and the rotary compression section. In addition, since a high compression ratio is required under conditions where a large temperature difference with the outside is created, the compressor (1) may be more advantageous in environments where a temperature much higher than the outside temperature or a temperature much lower than the outside temperature must be created.

[0136] The compressor (1) can compress the refrigerant primarily through the scroll compression section (100) and secondarily through the rotary compression section (200). In other words, the refrigerant flowing into the compressor (1) can be compressed by passing through the scroll compression section (100) and the rotary compression section (200) sequentially. That is, the refrigerant flowing into the case (10) through the inlet (14) can be compressed by passing through the rotary compression section (200) after passing through the scroll compression section (100), and the compressed refrigerant can be discharged to the outside of the case (10) through the outlet (15).

[0137] As described above, the scroll compressor (100) may include a bypass device (130). Accordingly, when a large amount of liquid refrigerant is introduced into the compressor (1), the liquid refrigerant may be bypassed during the process in which the scroll compressor (100) primarily compresses the refrigerant. Due to this configuration, the compressor (1) may not require a separate accumulator to separate the liquid refrigerant, and the manufacturing / installation cost of the refrigeration cycle device may be reduced.

[0138] The compressor (1) may include a flow path connecting the scroll compressor section (100) and the rotary compressor section (200). Refrigerant discharged from the scroll compressor section (100) may flow into the rotary compressor section (200) through the above-mentioned flow path.

[0139] The compressor (1) may include a connecting pipe (300). The connecting pipe (300) may form a flow path connecting the scroll compressor (100) and the rotary compressor (200). Specifically, the connecting pipe (300) may form a flow path connecting a first receiving space (S1) in which the refrigerant discharged by the scroll compressor (100) is received and a second compression space (C2) of the rotary compressor (200). In other words, the connecting pipe (300) may connect the first receiving space (S1) and the second compression space (C2).

[0140] The connecting pipe (300) can be connected to the outer surface of the case (10). That is, the connecting pipe (300) can be provided on the outside of the case (10). The external space of the case (10) can be provided at a relatively lower temperature compared to the internal space of the case (10) where the drive motor (60), scroll compressor (100), and rotary compressor (200) operate. Therefore, while the refrigerant passes through the connecting pipe (300) provided on the outside of the case (10), the refrigerant can be cooled due to the low temperature of the external space of the case (10). Through this configuration, damage to the compressor (1) or the refrigeration cycle device due to the high temperature of the refrigerant can be prevented. In addition, as the temperature of the refrigerant decreases, the maximum pressure of the refrigerant discharged from the compressor (1) can be increased, so the performance of the compressor (1) can be enhanced.

[0141] The connecting pipe (300) may include a refrigerant inlet (310). The refrigerant inlet (310) may be provided to introduce refrigerant compressed by the scroll compression unit (100). Specifically, the refrigerant inlet (310) may be connected to a first receiving space (S1). In other words, the refrigerant inlet (310) may be in communication with the first receiving space (S1). The refrigerant inlet (310) may be coupled to one side wall of the case (10) forming the first receiving space (S1).

[0142] The connecting pipe (300) may include a refrigerant discharge section (320). The refrigerant discharge section (320) may be provided to discharge refrigerant to the rotary compression section (200). Specifically, the refrigerant discharge section (320) may be connected to the second receiving space (S2). In other words, the refrigerant discharge section (320) may be in communication with the second receiving space (S2). The refrigerant discharge section (320) may be coupled to one side wall of the case (10) forming the second receiving space (S2).

[0143] The refrigerant introduced into the connecting pipe (300) through the refrigerant inlet (310) can be discharged through the refrigerant discharge (320). Specifically, the refrigerant introduced into the connecting pipe (300) from the first receiving space (S1) through the refrigerant inlet (310) can be discharged into the second compression space (C2) through the refrigerant discharge (320).

[0144] Below, we will look more closely at the oil and related components contained in the case (10) with reference to FIG. 8.

[0145] As described above, the case (10) can be provided to accommodate oil. That is, oil can be stored within the receiving space (S). Specifically, oil can be stored within the second receiving space (S2).

[0146] A storage space for storing oil may be formed in the lower part of the second receiving space (S2). At least a portion of the rotary compression unit (200) may be submerged in the storage space.

[0147] Oil can flow through the shaft (70) to the scroll compression section (100) and the rotary compression section (200), respectively. Specifically, the oil in the oil storage space is sucked into the shaft through an oil suction hole formed in the shaft (70), then flows along the oil path inside the shaft (70), and can be discharged to the scroll compression section (100) and the rotary compression section (200), respectively, through an oil discharge hole formed in the shaft (70).

[0148] The oil introduced into the scroll compression unit (100) can reduce friction between the various members of the scroll compression unit (100). In addition, the oil introduced into the scroll compression unit (100) can seal the gaps formed between the various members of the scroll compression unit (100), thereby preventing the refrigerant introduced into the first compression space (C1) from leaking.

[0149] The oil introduced into the rotary compression unit (200) can reduce friction between the various members of the rotary compression unit (200). In addition, the oil introduced into the rotary compression unit (200) can seal the gaps formed between the various members of the rotary compression unit (200), thereby preventing the refrigerant introduced into the second compression space (C2) from leaking.

[0150] According to the concept of the present disclosure, the compressor (1) can compress the refrigerant primarily through the scroll compression section (100) and compress the refrigerant secondarily through the rotary compression section (200). After undergoing the two compression processes described above, the refrigerant discharged from the rotary compression section (200) can be received in the second receiving space (S2). Accordingly, the second receiving space (S2) may be the space having the highest pressure inside the case (10), and the first compression space (C1) or the second compression space (C2) may have a lower pressure than the pressure inside the second receiving space (S2).

[0151] Due to the pressure difference described above, it may be easier to transfer the oil contained in the second receiving space (S2) to the scroll compression unit (100) forming the first compression space (C1) or the rotary compression unit (200) forming the second compression space (C2). That is, by storing the oil in the second receiving space (S2) where the refrigerant that has undergone two compression processes is contained, the process of transferring the oil to the scroll compression unit (100) and the rotary compression unit (200) may be made easier.

[0152] However, some of the oil delivered to the scroll compressor (100) and the rotary compressor (200) may be mixed with the refrigerant. Therefore, the refrigerant discharged from the rotary compressor (200) may be in a state mixed with oil. If the oil is discharged from the compressor (1) together with the refrigerant and flows through the refrigeration cycle device, the efficiency of the refrigeration cycle device may be further reduced. Therefore, a process of separating the oil from the refrigerant may be required before discharging the refrigerant from the compressor (1).

[0153] As described above, the refrigerant discharged from the rotary compression unit (200) can pass through the drive motor (60) and flow toward the discharge port (15). During the process of the refrigerant flowing through the drive motor (60), oil can be separated from the refrigerant. Specifically, the oil can be separated from the refrigerant by adhering to the components of the drive motor (60) or by adhering to the inner surface of the case (10) due to the airflow generated by the rotation of the rotor (62).

[0154] Additionally, oil adhering to the components of the drive motor (60) or the inner surface of the case (10) can fall into the oil storage space due to its own weight. With this configuration, the total amount of oil inside the case (10) can be maintained.

[0155] Below, with reference to FIG. 8, we will examine the refrigerant flow path (P) inside the compressor (1).

[0156] The compressor (1) can form a refrigerant flow path (P) through which the refrigerant flows. The refrigerant flow path (P) can extend from an inlet (14) through a scroll compression section (100) and a rotary compression section (200) to an outlet (15). Specifically, the refrigerant flow path (P) can extend from an inlet (14) and an inlet pipe (40) through a first compression space (C1), a first receiving space (S1), a connecting pipe (300), a second compression space (C2), and a second receiving space (C2) to an outlet (15) and an outlet pipe (50).

[0157] With respect to the refrigerant flow path (P), the scroll compression section (100) may be positioned upstream of the rotary compression section (200). In other words, with respect to the refrigerant flow path (P), the rotary compression section (200) may be positioned downstream of the scroll compression section (100). With respect to the refrigerant flow path (P), the connecting pipe (300) may be positioned between the scroll compression section (100) and the rotary compression section (200). Due to this configuration, the compressor (1) can compress the refrigerant primarily through the scroll compression section (100) and compress the refrigerant secondarily through the rotary compression section (200).

[0158] The refrigerant supplied into the compressor (1) can flow along the refrigerant path (P). The refrigerant flowing along the refrigerant path (P) can be introduced into the compression space (C1) of the first scroll compressor (100) through the inlet port (14) and the inlet pipe (40). The refrigerant introduced into the first compression space (C1) can be primarily compressed and discharged into the first receiving space (S1). The refrigerant discharged into the first receiving space (S1) can be introduced into the second compression space (C2) of the rotary compressor (200) through the connecting pipe (300). The refrigerant introduced into the second compression space (C2) can be secondarily compressed and discharged into the second receiving space (S2). The refrigerant in the second receiving space (S2) can be discharged outside the compressor (1) through the discharge port (15) and the discharge pipe (50).

[0159] Figure 9 is an enlarged view of area A shown in Figure 8.

[0160] Referring to FIGS. 8 and 9, the frame (20) can be fixed to the case (10). In other words, the frame (20) can be coupled to the case (10).

[0161] The frame (20) may be provided to support the scroll compression unit (100). For example, the frame (20) may support the scroll compression unit (100) at the lower side of the pivot scroll (120).

[0162] The frame (20) may include a protrusion (21) that protrudes from the outer surface of the frame (20). Specifically, the protrusion (21) may protrude radially from the outer surface of the frame (20).

[0163] At least a portion of the protrusion (21) can be inserted between the main body (11) and the top cover (12). Through this configuration, the frame (20) can be fixed / coupled to the case (10).

[0164] Although not shown in the drawing, the frame (20) may be welded to the inner surface of the case (10). Through this configuration, the frame (20) can be more securely fixed / bonded to the case (10).

[0165] There are no special restrictions on the method of fixing / joining the frame (20) and the case (10). For example, the frame (20) may be welded to the inner surface of the case (10) while at least a portion of the protrusion (21) is inserted between the main body (11) and the top cover (12), or it may be fixed / joined to the case (10) only by welding to the inner surface of the case (10).

[0166] The compressor (1) may include a sealing member (90). The sealing member (90) may be provided to prevent refrigerant from leaking from the first receiving space (S1) or the second receiving space (S1) toward the frame (20).

[0167] A sealing member (90) may be provided between the outer surface of the frame (20) and the inner surface of the case (10). The sealing member (90) may seal the space between the outer surface of the frame (20) and the inner surface of the case (10). For example, a groove (22) may be provided on the outer surface of the frame (20), and the sealing member (90) may be inserted into the groove (22) of the frame (20). Accordingly, it is possible to prevent refrigerant from leaking through the gap between the outer surface of the frame (20) and the inner surface of the case (10) in the first receiving space (S1) or the second receiving space (S2).

[0168] The sealing member (90) may extend along the outer surface of the frame (20). In other words, the sealing member (90) may be provided to wrap around the outer surface of the frame (20). For example, the sealing member (90) may be provided in a roughly ring shape.

[0169] The sealing member (90) may include an elastic material. For example, the sealing member (90) may include an O-ring.

[0170] In the drawing, the sealing member (90) is shown as being provided between the outer surface of the frame (20) and the inner surface of the case (10), but the location of the sealing member (90) is not limited thereto. For example, the sealing member (90) may be provided between the outer surface of the fixed scroll (110) and the inner surface of the case (10). In this case, it is possible to prevent the refrigerant from leaking through the gap between the outer surface of the fixed scroll (110) and the inner surface of the case (10) in the first receiving space (S1) or the second receiving space (S2).

[0171] FIG. 10 is a drawing showing an enlarged view of a portion of the cross-section of a compressor according to one embodiment.

[0172] Hereinafter, a compressor (1a) according to one embodiment of the present disclosure will be described with reference to FIG. 10. In describing the compressor (1a), the same reference numerals are assigned to components substantially identical to those shown in FIG. 1 to FIG. 9, and detailed descriptions may be omitted.

[0173] The compressor (1a) may include a case (10). The case (10) may include a main body (11), a top cover (12) provided on the upper side of the main body (11), and a base (13) provided on the lower side of the main body (11).

[0174] The compressor (1a) may include a frame (20a). The frame (20a) may be provided to partition the internal space of the case (10).

[0175] The frame (20a) can be fixed to the case (10). In other words, the frame (20a) can be coupled to the case (10).

[0176] The frame (20a) may include a protrusion (21a) that protrudes from the outer surface of the frame (20a). Specifically, the protrusion (21a) may protrude radially from the outer surface of the frame (20a).

[0177] At least a portion of the protrusion (21a) can be inserted between the main body (11) and the top cover (12). Through this configuration, the frame (20a) can be fixed / coupled to the case (10a).

[0178] The protrusion (21a) can be welded to the main body (11) and the top cover (12). Specifically, the outer end of the protrusion (21a), the upper end of the main body (11), and the lower end of the top cover (12) can be welded together. For example, a weld (W) can be formed in the space enclosed by the outer end of the protrusion (21a), the upper end of the main body (11), and the lower end of the top cover (12).

[0179] Through this configuration, it is possible to prevent the refrigerant from leaking from the first receiving space (S1) or the second receiving space (S2) toward the frame (20a). In this case, configurations such as the sealing member (90) shown in FIG. 9 or the groove (22) of the frame (20) may be omitted.

[0180] FIG. 11 is a cross-sectional view of a compressor according to one embodiment.

[0181] Hereinafter, a compressor (1b) according to one embodiment of the present disclosure will be described with reference to FIG. 11. In describing the compressor (1b), the same reference numerals are assigned to components substantially identical to those shown in FIG. 1 to FIG. 9, and detailed descriptions may be omitted.

[0182] Referring to FIG. 11, the compressor (1b) may include a case (10). The case (10) may form a receiving space (S) for accommodating various components of the compressor (1b).

[0183] The compressor (1b) may include a frame (20). The frame (20) may divide the receiving space (S) into a first receiving space (S1) and a second receiving space (S2). The first receiving space (S1) may be provided to receive the refrigerant discharged by the scroll compressor (100), and the second receiving space (S2) may be provided to receive the refrigerant discharged by the rotary compressor (200).

[0184] The compressor (1b) may include a connecting pipe (300b). The connecting pipe (300b) may form a flow path connecting the scroll compression section (100) and the rotary compression section (200).

[0185] The connecting pipe (300b) may include a refrigerant inlet (310b). The refrigerant inlet (310b) may be provided to introduce refrigerant compressed by the scroll compression unit (100). Specifically, the refrigerant inlet (310) may be connected to a first receiving space (S1). In other words, the refrigerant inlet (310) may be in communication with the first receiving space (S1). The refrigerant inlet (310b) may be coupled to one side wall of the case (10) forming the first receiving space (S1).

[0186] The connecting pipe (300b) may include a refrigerant discharge section (320b). The refrigerant discharge section (320b) may be provided to discharge refrigerant to the rotary compressor section (200). Specifically, the refrigerant discharge section (320b) may be connected to the second receiving space (S2). In other words, the refrigerant discharge section (320b) may be in communication with the second receiving space (S2). The refrigerant discharge section (320b) may be coupled to one side wall of the case (10) forming the second receiving space (S2).

[0187] As described above, some of the oil contained in the second receiving space (S2) may be delivered to the scroll compression unit (100). Therefore, the refrigerant discharged from the scroll compression unit (100) may be in a state mixed with oil. The said oil may flow into the rotary compression unit (200) through the connecting pipe (300b) together with the refrigerant, or it may remain inside the first receiving space (S1) and be collected at the bottom of the first receiving space (S1). If the amount of oil remaining inside the first receiving space (S1) increases, the total amount of oil available for use by the compressor (1b) may decrease.

[0188] According to the concept of the present disclosure, the refrigerant inlet (310b) may be connected to the lower part of the first receiving space (S1). That is, the location where the refrigerant inlet (310b) is connected may be the lower part of one side wall of the case (10) forming the first receiving space (S1). Preferably, the refrigerant inlet (310b) may be connected to the lowest part of the first receiving space (S1). Through this configuration, a portion of the oil collected in the lower part of the first receiving space (S1) can be introduced into the refrigerant inlet (310b), and the amount of oil remaining in the first receiving space (S1) can be reduced. That is, the reduction of the total amount of oil available for use by the compressor (1b) can be limited.

[0189] FIG. 12 is a cross-sectional view of a compressor according to one embodiment.

[0190] Hereinafter, a compressor (1c) according to one embodiment of the present disclosure will be described with reference to FIG. 12. In describing the compressor (1c), the same reference numerals are assigned to components substantially identical to those shown in FIG. 1 to FIG. 9, and detailed descriptions may be omitted.

[0191] Referring to FIG. 12, the compressor (1c) may include a case (10). The case (10) may form a receiving space (S) for accommodating various components of the compressor (1c).

[0192] The compressor (1c) may include a plurality of frames (20, 20c). The plurality of frames (20) may divide the receiving space (S) into a first receiving space (S1) and a second receiving space (S2). The first receiving space (S1) may be provided to receive the refrigerant discharged by the scroll compressor (100), and the second receiving space (S2) may be provided to receive the refrigerant discharged by the rotary compressor (200).

[0193] A plurality of frames (20, 20c) may include a first frame (20). The first frame (20) may support a scroll compression part (100) at the lower side of a pivot scroll (120). For example, the first frame (20) may have substantially the same configuration as the frame (20) shown in FIG. 3 or FIG. 8.

[0194] A plurality of frames (20, 20c) may include a second frame (20c). The second frame (20c) may support the scroll compression part (100) on the upper side of the pivot scroll (120).

[0195] The compressor (1c) may include a connecting pipe (300). The connecting pipe (300) may include a refrigerant inlet (310) and a refrigerant outlet (320). The refrigerant inlet (310) may be connected to a first receiving space (S1') to introduce refrigerant compressed by the scroll compressor (100). The refrigerant outlet (320) may be connected to a second receiving space (S2') to discharge refrigerant to the rotary compressor (200).

[0196] A connecting pipe (300) can be connected to the outer surface of the case (10). A refrigerant inlet (310) can be connected to one side wall of the case (10) forming a first receiving space (S1'). A refrigerant outlet (320) can be connected to one side wall of the case (10) forming a second receiving space (S2').

[0197] The second frame (20c) can be fixed to the case (10). In other words, the second frame (20c) can be coupled to the case (10).

[0198] The second frame (20c) may be provided to support the scroll compression unit (100). For example, the second frame (20c) may be provided to surround at least a portion of the fixed scroll (110). Specifically, the second frame (20c) may be provided to surround at least a portion of the scroll body (111). The second frame (20c) may be positioned between the outer surface of the fixed scroll (110) and the inner surface of the case (10).

[0199] The second frame (20c) can be coupled to the upper part of the fixed scroll (110). Accordingly, the vertical spacing of the first receiving space (S1') can be relatively narrowed. For example, the vertical spacing of the first receiving space (S1') shown in FIG. 12 can be narrower than the vertical spacing of the first receiving space (S1) shown in FIG. 8.

[0200] As described above, the refrigerant discharged from the scroll compression unit (100) may be mixed with oil, and the said oil may flow into the rotary compression unit (200) through the connecting pipe (300) together with the refrigerant, or remain inside the first receiving space (S1') and be collected at the bottom of the first receiving space (S1'). If the amount of oil remaining inside the first receiving space (S1') increases, the total amount of oil available for use by the compressor (1c) may decrease.

[0201] According to the concept of the present disclosure, the refrigerant inlet (310) may be positioned adjacent to the lower portion of the first receiving space (S1'). Through this configuration, a portion of the oil collected in the lower portion of the first receiving space (S1') can be introduced into the refrigerant inlet (310), and the amount of oil remaining in the first receiving space (S1') can be reduced. That is, the reduction of the total amount of oil available for use by the compressor (1c) can be limited.

[0202] FIG. 13 is a refrigerant flow path diagram of a refrigeration cycle device according to one embodiment.

[0203] Hereinafter, a refrigeration cycle device according to one embodiment of the present disclosure will be described with reference to FIG. 13. In describing the refrigeration cycle device, the same reference numerals are assigned to components substantially identical to those shown in FIG. 1, and detailed descriptions may be omitted.

[0204] Referring to FIG. 13, a refrigeration cycle device may include a compressor (1), a condenser (2), an expansion device (3), and an evaporator (4). The compressor (1), condenser (2), expansion device (3), and evaporator (4) may form a closed cycle.

[0205] The refrigeration cycle device may include a separator (5). The separator (5) may be positioned between the condenser (2) and the expansion device (3) based on the flow path within the refrigeration cycle device. The separator (5) may be configured to separate the refrigerant that has passed through the condenser into a gaseous refrigerant and a liquid refrigerant.

[0206] A refrigeration cycle device may include a plurality of transfer pipes for connecting a compressor (1), a condenser (2), an expansion device (3), an evaporator (4), and a separator (5) to each other. Each of the plurality of transfer pipes may be provided to transfer refrigerant. Specifically, the plurality of transfer pipes may include a first transfer pipe (P1) connecting the compressor (1) and the condenser (2), a second transfer pipe (P2) connecting the condenser (2) and the expansion device (3), a third transfer pipe (P3) connecting the expansion device (3) and the evaporator (4), and a fourth transfer pipe (P4) connecting the evaporator (4) and the compressor (1).

[0207] The second transfer pipe (P2) may include the fifth transfer pipe (P5) and the sixth transfer pipe (P6). The fifth transfer pipe (P5) may connect the condenser (2) and the separator (5), and the sixth transfer pipe (P6) may connect the separator (5) and the expansion device (3). The fifth transfer pipe (P5) may transfer gaseous refrigerant and liquid refrigerant together, and the sixth transfer pipe (P6) may transfer only the liquid refrigerant separated from the separator (5).

[0208] A plurality of transfer pipes may include a seventh transfer pipe (P7). The seventh transfer pipe (P7) may connect the separator (5) and the compressor (1). The seventh transfer pipe (P7) may transfer only the gaseous refrigerant separated from the separator (5).

[0209] FIG. 14 is a cross-sectional view of a compressor according to one embodiment.

[0210] Hereinafter, a compressor (1d) according to one embodiment of the present disclosure will be described with reference to FIG. 14. In describing the compressor (1d), the same reference numerals are assigned to components substantially identical to those shown in FIG. 1 to FIG. 9, and detailed descriptions may be omitted.

[0211] Referring to FIG. 14, the compressor (1d) may include a case (10d). The case (10) may form a receiving space (S) for accommodating various components of the compressor (1d).

[0212] The case (10d) may include a main body (11d), a top cover (12d) provided on the upper side of the main body (11d), and a base (13d) provided on the lower side of the main body (11d).

[0213] The case (10d) may include an inlet (14). The inlet (14) may be provided to introduce refrigerant. Specifically, refrigerant discharged from the evaporator (4, see FIG. 13) may be provided to be introduced into the compressor (1d) through the inlet (14). For example, the inlet (14) may be formed in the top cover (12d) of the case (10d).

[0214] The case (10d) may include an outlet (15). The outlet (15) may be provided to discharge refrigerant. Specifically, the refrigerant discharged through the outlet (15) may be provided to flow into a condenser (2, see FIG. 13). For example, the outlet (15) may be formed in the main body (11d) of the case (10d).

[0215] The case (10d) may include an injection inlet (16d). The injection inlet (16d) may be provided to introduce refrigerant. Specifically, gaseous refrigerant discharged from the separator (5, see FIG. 13) may be provided to be introduced into the compressor (1d) through the injection inlet (16d). For example, the injection inlet (16d) may be formed in the top cover (12d) of the case (10d).

[0216] The compressor (1d) may include an injection pipe (17d). The injection pipe (17d) may be provided to pass through an injection inlet (16d). A seventh transfer pipe (P7) for transferring gaseous refrigerant discharged from a separator (5, see FIG. 13) may be coupled to the injection inlet pipe (17d).

[0217] The compressor (1d) may include a frame (20). The frame (20) may divide the receiving space (S) into a first receiving space (S1) and a second receiving space (S2). The first receiving space (S1) may be provided to receive the refrigerant discharged by the scroll compressor (100), and the second receiving space (S2) may be provided to receive the refrigerant discharged by the rotary compressor (200).

[0218] The injection inlet (16d) may be in communication with the first receiving space (S1). Additionally, the injection pipe (17d) may be in communication with the first receiving space (S1). Thus, gaseous refrigerant discharged from the separator (5, see FIG. 13) may be introduced into the first receiving space (S1) through the injection inlet (16d). In other words, some of the refrigerant that has passed through the condenser (2, see FIG. 13) may be introduced into the first receiving space (S1) through the injection inlet (16d). Through this configuration, the compressed refrigerant discharged from the scroll compressor (100) may be mixed with the gaseous refrigerant discharged from the separator (5, see FIG. 13).

[0219] The refrigerant discharged from the separator (5, see FIG. 13) may have a lower temperature than the refrigerant discharged from the scroll compressor (100). Therefore, as the refrigerant discharged from the scroll compressor (100) is mixed with the refrigerant discharged from the separator (5, see FIG. 13), the average temperature of the refrigerant may be lowered, and the maximum pressure of the refrigerant discharged from the compressor (1d) may be increased. Additionally, the amount of refrigerant compressed per unit time in the compressor (1d) may be increased. Due to this configuration, the performance and efficiency of the compressor (1d) may be increased.

[0220] FIG. 15 is a cross-sectional view of a compressor according to one embodiment.

[0221] Hereinafter, a compressor (1e) according to one embodiment of the present disclosure will be described with reference to FIG. 15. In describing the compressor (1e), the same reference numerals are assigned to components substantially identical to those shown in FIG. 1 to FIG. 9, and detailed descriptions may be omitted.

[0222] The compressor (1e) may include a case (10). The case (10) may form a receiving space (S) for accommodating various components of the compressor (1e).

[0223] The case (10) may include a main body (11), a top cover (12) provided on the upper side of the main body (11), and a base (13) provided on the lower side of the main body (11).

[0224] The case (10) may include an inlet (14). The inlet (14) may be provided to introduce refrigerant. Specifically, refrigerant discharged from the evaporator (4, see FIG. 13) may be provided to be introduced into the compressor (1) through the inlet (14). For example, the inlet (14) may be formed in the top cover (12) of the case (10).

[0225] The case (10) may include an outlet (15). The outlet (15) may be provided to discharge refrigerant. Specifically, the refrigerant discharged through the outlet (15) may be provided to flow into a condenser (2, see FIG. 13). For example, the outlet (15) may be formed in the main body (11) of the case (10).

[0226] The compressor (1e) may include a frame (20). The frame (20) may divide the receiving space (S) into a first receiving space (S1) and a second receiving space (S2). The first receiving space (S1) may be provided to receive the refrigerant discharged by the scroll compressor (100), and the second receiving space (S2) may be provided to receive the refrigerant discharged by the rotary compressor (200).

[0227] The compressor (1e) may include a connecting pipe (300e). The connecting pipe (300e) may include a refrigerant inlet (310e) and a refrigerant outlet (320e). The refrigerant inlet (310e) may be connected to a first receiving space (S1') to introduce refrigerant compressed by the scroll compressor (100). The refrigerant outlet (320e) may be connected to a second receiving space (S2') to discharge refrigerant to the rotary compressor (200).

[0228] The connecting pipe (300e) may include an injection inlet pipe (330e). The injection inlet pipe (330e) may be configured to receive gaseous refrigerant discharged from the separator (5, see FIG. 13). In other words, the injection inlet pipe (330e) may be configured to receive some of the refrigerant that has passed through the condenser (2, see FIG. 13). A seventh transfer pipe (P7) for transferring refrigerant discharged from the separator (5, see FIG. 13) may be coupled to the injection inlet pipe (330e).

[0229] The injection inlet pipe (330e) can be in communication with the inside of the connecting pipe (300e). Thus, the refrigerant discharged from the separator (5, see FIG. 13) can be introduced into the inside of the connecting pipe (300e). Through this configuration, the refrigerant discharged from the scroll compression unit (100) and introduced into the connecting pipe (300e) can be mixed with the refrigerant discharged from the separator (5, see FIG. 13).

[0230] The refrigerant discharged from the separator (5, see FIG. 13) may have a lower temperature than the refrigerant discharged from the scroll compressor (100). Therefore, as the refrigerant discharged from the scroll compressor (100) is mixed with the refrigerant discharged from the separator (5, see FIG. 13), the average temperature of the refrigerant may be lowered, and the maximum pressure of the refrigerant discharged from the compressor (1e) may be increased. Additionally, the amount of refrigerant compressed per unit time in the compressor (1e) may be increased. Due to this configuration, the performance and efficiency of the compressor (1e) may be increased.

[0231] A compressor (1) according to one embodiment comprises a case (10) including an inlet (14) and an outlet (15), a scroll compression unit (100) including a fixed scroll (110) provided inside the case (10) and a rotary scroll (120) provided to rotate relative to the fixed scroll (110), and a rotary compression unit (200) including a cylinder (210) provided inside the case (10) and a roller (250) provided to rotate along the inner wall of the cylinder (210) inside the cylinder (210). The case (10), the scroll compression unit (100), and the rotary compression unit (200) are arranged so that a refrigerant introduced into the case (10) through the inlet (14) passes through the scroll compression unit (100), then passes through the rotary compression unit (200), and is discharged outside the case (10) through the outlet (15).

[0232] The compressor (1) may further include a connecting pipe (300) comprising a refrigerant inlet (310) arranged to introduce refrigerant compressed by the scroll compressor (100) and a refrigerant outlet (320) arranged to discharge the refrigerant introduced by the refrigerant inlet (310) to the rotary compressor (200).

[0233] The above connecting tube (300) can be connected to the outer surface of the case (10).

[0234] The compressor (1) may further include a frame (20) that divides the internal space (S) of the case (10) into a first receiving space (S1) provided to receive the refrigerant discharged by the scroll compressor (100) and a second receiving space (S2) provided to receive the refrigerant discharged by the rotary compressor (200).

[0235] The first receiving space (S1) may be provided above the second receiving space (S2).

[0236] The compressor (1) may further include a drive motor (60) for driving at least one of the scroll compressor (100) and the rotary compressor (200). The drive motor (60) may be provided in the second receiving space (S2).

[0237] The above discharge port (15) is provided above the driving motor and can be connected to the second receiving space (S2).

[0238] The frame (20) can support the scroll compression unit (100). At least a portion of the frame (20) can be provided below the lower side of the pivot scroll (120).

[0239] The compressor (1) may further include a sealing member (90) provided between the outer surface of the frame (20) and the inner surface of the case (10).

[0240] The compressor (1) may further include an inlet pipe (40) penetrating the inlet port (14). The scroll compression unit (100) may include a compression space (C1) in which the refrigerant passing through the scroll compression unit (100) is compressed. The inlet pipe (40) may be in communication with the compression space (C1).

[0241] The above case (10) may further include a main body (11) and a top cover (12) provided on the upper side of the main body (11). The frame (20) may include a protrusion (21) protruding from the outer surface of the frame (20). At least a portion of the protrusion (21) may be inserted between the main body (11) and the top cover (12).

[0242] The above protrusion (21a) can be welded to the main body (11) and the top cover (12).

[0243] The frame (20) supporting the scroll compression unit (100) may be a first frame (20). The compressor (1) may further include a second frame (20c) that surrounds at least a portion of the fixed scroll (110) to support the scroll compression unit (100).

[0244] The above inlet (14) may be a first inlet (14) that communicates with the scroll compression unit (100). The refrigerant discharged through the above outlet (15) may flow into the condenser (2). The compressor (1d) may further include a second inlet (16d) provided to introduce gaseous refrigerant among the refrigerant that has passed through the condenser (2). The second inlet (16d) may communicate with the first receiving space (S1).

[0245] The refrigerant discharged through the above outlet (15) can flow into the condenser (2). The above connecting pipe (300) may further include an inlet pipe (330e) provided to introduce gaseous refrigerant among the refrigerant that has passed through the condenser (2).

[0246] A compressor (1) according to one embodiment comprises a case (10) including an inlet (14) and an outlet (15), a scroll compression unit (100) including a fixed scroll (110) provided inside the case (10) and a pivoting scroll (120) provided to pivot relative to the fixed scroll (110), and a rotary compression unit (200) including a cylinder (210) provided inside the case (10) and a roller (250) provided to rotate along the inner wall of the cylinder (210) inside the cylinder (210). Based on a refrigerant flow path (P) extending from the inlet (14) to the outlet (15), the scroll compression unit (100) is positioned upstream of the rotary compression unit (200).

[0247] The compressor (1) may further include a connecting pipe (300) comprising a refrigerant inlet (310) arranged to introduce refrigerant compressed by the scroll compressor (100) and a refrigerant outlet (320) arranged to discharge refrigerant to the rotary compressor (200).

[0248] The above connecting pipe (300) can be positioned between the scroll compression section (100) and the rotary compression section (200) based on the refrigerant flow path (P) extending from the inlet (14) to the outlet (15).

[0249] The internal space (S) of the above case (10) may be divided into a first receiving space (S1) provided to receive the refrigerant discharged by the scroll compression unit (100) and a second receiving space (S2) provided to receive the refrigerant discharged by the rotary compression unit (200). The refrigerant inlet (310) may be in communication with the first receiving space (S1), and the refrigerant discharge unit (320) may be in communication with the second receiving space (S2).

[0250] The above connecting tube (300) can be connected to the outer surface of the case (10).

[0251] According to the concept of the present disclosure, the compressor may be a two-stage compressor comprising a scroll compressor and a rotary compressor. Accordingly, forming a high compression ratio through the compressor may be easier than forming a high compression ratio through any one-stage compressor comprising only one of the scroll compressor and the rotary compressor.

[0252] According to the concept of the present disclosure, the compressor can primarily compress the refrigerant through a scroll compressor. Since the scroll compressor may include a bypass device for separating the liquid refrigerant, the installation of an accumulator may not be necessary.

[0253] According to the concept of the present disclosure, the compressor can secondarily compress the refrigerant through a rotary compressor. Additionally, a drive motor for driving at least one of the scroll compressor and the rotary compressor may be accommodated in the space accommodating the rotary compressor. Due to this configuration, oil mixed with the refrigerant discharged from the rotary compressor can be separated from the refrigerant during the process of passing through the drive motor, and the separated oil can be collected in a storage space below the drive motor. Accordingly, the compressor can easily remove oil from the refrigerant discharged from the compressor and maintain the total amount of oil stored inside the compressor at a certain level.

[0254] The effects obtainable from the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure belongs from the description below.

[0255] Specific embodiments have been illustrated and described above. However, the invention is not limited to the embodiments described above, and those skilled in the art may make various modifications without departing from the essence of the technical concept of the invention as described in the following claims.

Claims

1. A case including an inlet and an outlet; A scroll compression unit comprising a fixed scroll provided inside the above case and a pivoting scroll provided to pivot relative to the fixed scroll; and It includes a rotary compression unit comprising a cylinder provided inside the above case and a roller provided to rotate along the inner wall of the cylinder inside the cylinder, and The above case, the scroll compression unit, and the rotary compression unit are a compressor configured such that a refrigerant flowing into the inside of the case through the inlet passes through the scroll compression unit, then passes through the rotary compression unit, and is discharged to the outside of the case through the outlet.

2. In Paragraph 1, A compressor further comprising a connecting pipe including a refrigerant inlet section arranged to introduce refrigerant compressed by the scroll compression section and a refrigerant discharge section arranged to discharge the refrigerant introduced by the refrigerant inlet section to the rotary compression section.

3. In Paragraph 2, The above connecting pipe is a compressor coupled to the outer surface of the above case.

4. In Paragraph 1, A compressor further comprising a frame that divides the internal space of the above case into a first receiving space provided to receive the refrigerant discharged by the scroll compressor and a second receiving space provided to receive the refrigerant discharged by the rotary compressor.

5. In Paragraph 4, The first receiving space is a compressor provided above the second receiving space.

6. In Paragraph 5, It further includes a drive motor for driving at least one of the scroll compression unit and the rotary compression unit, and The above-mentioned drive motor is a compressor provided in the above-mentioned second receiving space.

7. In Paragraph 6, The above discharge port is provided above the drive motor and is a compressor communicating with the second receiving space.

8. In Paragraph 4, The above frame supports the scroll compression unit, and A compressor in which at least a portion of the above frame is provided below the lower side of the above-mentioned pivot scroll.

9. In Paragraph 4, A compressor further comprising a sealing member provided between the outer surface of the frame and the inner surface of the case.

10. In Paragraph 1, It further includes an inlet pipe penetrating the above-mentioned inlet, and The scroll compression unit includes a compression space in which the refrigerant passing through the scroll compression unit is compressed, and The above inlet pipe is a compressor that communicates with the above compression space.

11. In Paragraph 4, The above case is Main body; and It further includes a top cover provided on the upper side of the main body, and The above frame is, It includes a protrusion protruding from the outer surface of the above frame, and A compressor in which at least a portion of the above-mentioned protrusion is inserted between the main body and the top cover.

12. In Paragraph 11, The above protrusion is a compressor welded to the main body and the top cover.

13. In Paragraph 8, The frame supporting the scroll compression unit is a first frame, and The above compressor is, A compressor further comprising a second frame surrounding at least a portion of the fixed scroll to support the scroll compression section.

14. In Paragraph 4, The above inlet is a first inlet communicating with the scroll compression unit, and The refrigerant discharged through the above outlet flows into the condenser, and The above compressor is, It further includes a second inlet provided to introduce gaseous refrigerant among the refrigerants that have passed through the condenser, and The above second inlet is a compressor communicating with the above first receiving space.

15. In Paragraph 2, The refrigerant discharged through the above outlet flows into the condenser, and The above connector is, A compressor further comprising an inlet pipe provided to introduce gaseous refrigerant among the refrigerants that have passed through the condenser.

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