Compressor and home appliance comprising same

Abstract

A compressor according to an embodiment of the present disclosure comprises: a case storing oil therein; a compression device which is arranged in the case and compresses refrigerant flowing in the case; a driving device which is arranged in the case and drives the compression device; and an oil trap portion which separates the refrigerant and the oil from each other or captures separated oil when the compression device operates. The oil trap portion can form a space which protrudes from the outer surface of the case and is recessed from the inner surface of the case in order to accommodate the oil. The oil trap portion may be at least partially located in a cavity region of the case, where the compression device and the driving device are not arranged.

Description

Compressors and home appliances containing them

[0001] Various embodiments of the present disclosure relate to a hermetic rotary compressor and a home appliance including the same.

[0002] A compressor is a mechanical device that uses a motor or turbine to compress air, refrigerant, or other working gas to increase its pressure. Compressors are widely used across industries, and when used in a refrigeration cycle, they convert low-pressure refrigerant into high-pressure refrigerant, which is then delivered to a condenser.

[0003] Compressors are broadly classified into reciprocating compressors in which a compression space where the working gas is sucked and discharged is formed between a piston and a cylinder, and the piston reciprocates linearly inside the cylinder to compress the refrigerant; scroll compressors in which a compression space where the working gas is sucked and discharged is formed between an orbiting scroll and a fixed scroll, and the orbiting scroll compresses the refrigerant as it rotates along the fixed scroll; and rotary compressors in which a compression space where the working gas is sucked and discharged is formed between a roller and a cylinder, and the roller eccentrically rotates along the inner wall of the cylinder to compress the refrigerant.

[0004] Among various compressors, rotary compressors may store oil within the case to lubricate the compressor for compressing the refrigerant. This stored oil can be separated from the refrigerant by the centrifugal force of the rotor during compressor operation and returned to the bottom of the case. However, during compressor operation, some of the oil may not separate from the refrigerant, or some of the separated oil may not be recovered and may be discharged outside the compressor along with the refrigerant. If the amount of oil discharged to the outside is large, problems may arise due to poor oil supply to the compressor, or the heat exchange efficiency of home appliances containing the compressor may be reduced.

[0005] The above information is provided solely as background information to aid in understanding the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above is applicable as prior art in connection with the present disclosure.

[0006] An aspect of the present disclosure is to address at least the problems and / or disadvantages mentioned above and to provide at least the advantages described below. Accordingly, one aspect of the present disclosure can provide a compressor having a structure for capturing or recovering oil separated from the refrigerant during operation of the compressor.

[0007] Additional aspects will be partly described in the following description, and partly will be apparent from the description or may be learned by studying the examples presented.

[0008] According to one embodiment of the present disclosure, a compressor may include a case storing oil therein, a compression device disposed inside the case for compressing refrigerant introduced into the case, a driving device disposed inside the case for driving the compression device, and an oil trap portion for separating refrigerant and oil or collecting separated oil when the compression device is operated. The oil trap portion may protrude from an outer surface of the case and be recessed from an inner surface of the case to form a space for accommodating the oil. At least a portion of the oil trap portion may be located in a cavity area of ​​the case where the compression device and the driving device are not disposed.

[0009] According to one embodiment of the present disclosure, a home appliance that controls temperature through heat exchange with the outside using a refrigerant may include a compressor for compressing the refrigerant. The compressor may include a case storing oil therein, a compression device disposed inside the case and configured to compress the refrigerant introduced into the case, a driving device disposed inside the case and configured to drive the compression device, and an oil trap portion for separating the refrigerant and oil or collecting the separated oil when the compression device is operated. The oil trap portion may protrude from an outer surface of the case and be recessed from an inner surface of the case to form a space for accommodating the oil. At least a portion of the oil trap portion may be located in a cavity area of ​​the case where the compression device and the driving device are not disposed.

[0010] According to various embodiments of the present disclosure, an oil trap provided within a cavity area of ​​a case where a compression device is not disposed protrudes outward from the case to form a space for capturing or recovering oil separated from the refrigerant within the cavity area, thereby increasing the length of stream lines of the refrigerant and / or oil within the cavity area, generating and confining vortices within the cavity area, and reducing the flow rate of the refrigerant and / or oil near the discharge pipe of the case. Accordingly, the separation of the refrigerant and oil becomes smooth during operation of the compressor, and by confining the separated oil within the cavity area, the amount of oil discharged to the outside of the case can be reduced.

[0011] Other aspects, advantages and salient features of the present disclosure will become apparent to those skilled in the art from the following detailed description of various embodiments of the present disclosure taken in conjunction with the accompanying drawings.

[0012] The above and other aspects, features and advantages of specific embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings.

[0013] FIG. 1 is a schematic diagram showing a cooling cycle device provided in a home appliance according to one embodiment of the present disclosure.

[0014] FIG. 2 is a cross-sectional view of a compressor according to one embodiment of the present disclosure.

[0015] FIG. 3 is a perspective view of the main body of a case according to one embodiment of the present disclosure.

[0016] FIG. 4 is a cross-sectional view taken along line I-I' shown in FIG. 3 according to one embodiment of the present disclosure.

[0017] FIG. 5 is a drawing comparing fluid flow inside a compressor according to one embodiment of the present disclosure and fluid flow inside a compressor according to a comparative example.

[0018] FIG. 6 is a drawing comparing fluid flow inside a compressor according to one embodiment of the present disclosure and fluid flow inside a compressor according to a comparative example.

[0019] FIG. 7 is a graph comparing the amount of fuel in a compressor according to one embodiment of the present disclosure and the amount of fuel in a compressor according to a comparative example.

[0020] Figure 8 is a perspective view of the main body of a case according to one embodiment of the present disclosure.

[0021] FIG. 9 is a perspective view of the main body of a case according to one embodiment of the present disclosure.

[0022] FIG. 10 is a cross-sectional view of a compressor according to one embodiment of the present disclosure.

[0023] FIG. 11 is a perspective view of the main body of a case according to one embodiment of the present disclosure.

[0024] Fig. 12 is a perspective view of the main body of a case according to one embodiment of the present disclosure.

[0025] Fig. 13 is a perspective view of the main body of a case according to one embodiment of the present disclosure.

[0026] It should be noted that the same reference numbers are used throughout the drawings to describe identical or similar elements, features and structures.

[0027] The following description, with reference to the accompanying drawings, is provided to facilitate a comprehensive understanding of various embodiments of the present disclosure defined by the claims and their equivalents. While it includes numerous specific details to facilitate such understanding, it should be considered merely illustrative. Accordingly, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the present invention. Furthermore, descriptions of well-known functions and configurations may be omitted for clarity and conciseness.

[0028] The terms and words used in the following description and claims are not limited to their bibliographic meanings, but are used solely to ensure a clear and consistent understanding of the disclosure by the inventors. Therefore, it should be clear to those skilled in the art that the following description of various embodiments of the disclosure is provided for illustrative purposes only and is not intended to limit the disclosure, which is defined by the appended claims and their equivalents.

[0029] It should be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a component surface” includes reference to one or more of those surfaces.

[0030] 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.

[0031] 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).

[0032] When a component (e.g., a first component) is referred to as being “coupled” or “connected” to another component (e.g., a second component), with or without the terms “functionally” or “communicatively,” it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] The term “and / or” includes any combination of a plurality of related described elements or any one of a plurality of related described elements.

[0037] The operating principle and various embodiments of the present disclosure are described below with reference to the attached drawings.

[0038] FIG. 1 is a schematic diagram showing a cooling cycle device provided in a home appliance according to one embodiment of the present disclosure.

[0039] FIG. 2 is a cross-sectional view of a compressor according to one embodiment of the present disclosure.

[0040] Referring to FIGS. 1 and 2, a refrigeration cycle device according to one embodiment performs four processes of compression, condensation, expansion, and evaporation, and can exchange heat with the refrigerant with the outside (e.g., indoor space). The refrigeration cycle device may include a compressor (1), a condenser (2), an expansion valve (3), and an evaporator (4). The four processes of compression, condensation, expansion, and evaporation are performed in each device as the refrigerant circulates through the compressor (1), the condenser (2), the expansion valve (3), and the evaporator (4).

[0041] According to one embodiment, the compressor (1) can compress the refrigerant into a high-temperature, high-pressure gaseous state (compression stroke). The high-temperature, high-pressure refrigerant gas compressed in the compressor (1) is introduced into the condenser (2).

[0042] According to one embodiment, the condenser (2) can condense the refrigerant compressed by the compressor (1) into a liquid state by exchanging heat with the outside (condensation process). The condenser (2) can release heat to the surroundings through this refrigerant condensation process. The refrigerant condensed in the condenser (2) flows into the expansion valve (3).

[0043] According to one embodiment, the expansion valve (3) can expand the high-temperature, high-pressure refrigerant condensed in the condenser (2) into a low-temperature, low-pressure state (expansion stroke). The low-temperature, low-pressure refrigerant expanded in the expansion valve (3) flows into the evaporator (4).

[0044] According to one embodiment, the evaporator (4) can evaporate the refrigerant expanded in the expansion valve (3) into a gaseous state by exchanging heat with the outside (evaporation process). The evaporator (4) can absorb heat from the surroundings through this refrigerant evaporation process. The low-temperature, low-pressure refrigerant gas evaporated in the evaporator (4) is returned to the compressor (1).

[0045] The temperature of an external environment (e.g., an indoor space) can be controlled through the refrigeration cycle operation in each device described above. Such a refrigeration cycle device can be installed in a home appliance. The home appliance may include an air conditioner, refrigerator, or freezer. However, the present disclosure is not limited thereto, and the refrigeration cycle device can be used in various home appliances equipped with a refrigeration cycle.

[0046] According to one embodiment, the refrigeration cycle device may further include an accumulator (5) for separating a gaseous refrigerant and a liquid refrigerant. In one embodiment, the accumulator (5) may separate the refrigerant introduced from the evaporator (4) into a gaseous refrigerant and a liquid refrigerant and then supply only the gaseous refrigerant to the compressor (1). In this case, liquid compression in the compressor (1) may be prevented. The accumulator (5) may be referred to as a liquid separator (5). In one embodiment, the accumulator (5) may be connected to the evaporator (4) through a first connecting pipe (51) and may be connected to the compressor (1) through a second connecting pipe (52). In one embodiment, the second connecting pipes (52a, 52b) may be provided in a number corresponding to the number of cylinders (23, 24) of the compression device (20) described below, and may be connected to each of the corresponding cylinders (23, 24) to supply refrigerant.

[0047] According to one embodiment, the compressor (1) may include a case (10) forming an exterior, a compression device (20) for compressing a refrigerant, and a driving device (30) for providing driving force to the compression device (20).

[0048] In one embodiment, the case (10) may form the exterior of the compressor (1). In one embodiment, components constituting the compressor (1), such as a compression device (20) and a driving device (30), may be arranged inside the case (10), and the devices may be sealed from the outside by the case (10). In one embodiment, oil for lubricating the compression device (20) may be stored in the lower part of the case (10).

[0049] According to one embodiment, the case (10) may be divided into several regions (or sections) along the vertical direction (e.g., ±z-axis direction) based on whether devices (e.g., compression devices (20) or driving devices (30)) are arranged in a region of the internal space of the case (10). For example, the case (10) may include a first region (S1) located at the top and having an empty interior, a second region (S2) located below the first region (S1) and having a driving device (30) arranged therein, a third region (S3) located between the second region (S2) and a fourth region (S4) described below and having an empty interior, and a fourth region (S4) located at the bottom and having a compression device (20) arranged therein. Here, the first region (S1) and the third region (S3) may be referred to as cavity regions, in which case the first region (S1) may be referred to as an upper cavity region, and the third region (S3) may be referred to as a lower cavity region. In addition, oil for lubricating the compression device (20) may be stored therein in the fourth region (S4).

[0050] According to one embodiment, the case (10) may include a body (11), a cover (12), a base (13), and a discharge tube (14).

[0051] According to one embodiment, the body (11) may have a hollow cylindrical shape, but the present disclosure is not limited thereto. In one embodiment, the body (11) may be open at the top and / or the bottom. Although not specifically illustrated in the drawing, a refrigerant inlet (not illustrated) for introducing refrigerant from the outside (e.g., an accumulator (5) and / or an evaporator (4)) may be formed on a side surface of the body (11).

[0052] According to one embodiment, an oil trap section (100) may be provided on the outer surface of the main body (11) to separate refrigerant and oil or to collect the separated oil when the compressor (1) is in operation. The oil trap sections (100a, 100b) may be provided in multiple numbers depending on the design, and the structure, shape, and / or function of the oil trap sections (100) will be described later.

[0053] In one embodiment, the cover (12) may be positioned on the upper side of the main body (11). For example, the cover (12) may be positioned to cover the upper side of the open main body (11). In one embodiment, the cover (12) may be joined to the main body (11) by a joining method such as welding.

[0054] In one embodiment, the base (13) may be positioned on the lower side of the main body (11). For example, the base (13) may be positioned to cover the lower side of the open main body (11). In one embodiment, the base (13) may be joined to the main body (11) by a joining method such as welding.

[0055] According to one embodiment, the discharge pipe (14) can connect the compressor (1) and the condenser (2), as illustrated in FIG. 1. In one embodiment, the discharge pipe (14) can guide the refrigerant compressed to high temperature and high pressure by the operation of the compressor (1) to the condenser (2). In one embodiment, the discharge pipe (14) can extend through the cover (12) of the case (10) and into the interior of the case (10).

[0056] In one embodiment, the compression device (20) may be positioned at the bottom of the case (10). In one embodiment, the compression device (20) may be positioned at the bottom of the drive device (30) and may be connected to the drive device (30) via a shaft (33).

[0057] According to one embodiment, the compression device (20) may include a first flange (21), a second flange (22), a first cylinder (23), a second cylinder (24), an intermediate plate (25), a first roller (26), and a second roller (27).

[0058] According to one embodiment, the first flange (21) may be disposed on the upper portion of the first cylinder (23). In one embodiment, the first flange (21) may be press-fitted onto the inner surface of the case (10). In one embodiment, the first flange (21) may be coupled with the shaft (33) to surround at least a portion of the shaft (33) and may support rotational movement of the shaft (33). The first flange (21) may also be referred to as a first bearing (21).

[0059] According to one embodiment, the second flange (22) may be disposed at the lower portion of the second cylinder (24). In one embodiment, the second flange (22) may be disposed to overlap the first flange (21). In one embodiment, the second flange (22) may be press-fitted onto the inner circumferential surface of the case (10). In one embodiment, the second flange (22) may be coupled to the shaft (33) so as to surround at least a portion of the shaft (33) and may support rotational movement of the shaft (33). The second flange (22) may also be referred to as a second bearing (22).

[0060] According to one embodiment, the first cylinder (23) may have a hollow cylindrical shape. In one embodiment, the first cylinder (23) may form an internal space (not shown) in which refrigerant is sucked / compressed together with the first flange (21) and the intermediate plate (25). The internal space (not shown) of the first cylinder (23) may be divided into a suction chamber (not shown) in which refrigerant is sucked by the first roller (26) and the first vane (not shown) in elastic contact with the first roller (26), and a compression chamber (not shown) in which the refrigerant is compressed.

[0061] According to one embodiment, the second cylinder (24) may have a hollow cylindrical shape. In one embodiment, the second cylinder (24) may form an internal space (not shown) in which refrigerant is sucked / compressed together with the second flange (22) and the intermediate plate (25). The internal space (not shown) of the second cylinder (24) may be divided into a suction chamber (not shown) in which refrigerant is sucked by the second roller (27) and a second vane (not shown) in elastic contact with the second roller (27), and a compression chamber (not shown) in which the refrigerant is compressed.

[0062] In one embodiment, the intermediate plate (25) may be positioned between the first cylinder (23) and the second cylinder (24). In one embodiment, the intermediate plate (25) may partition the internal space of each of the first cylinder (23) and the second cylinder (24).

[0063] According to one embodiment, the first roller (26) may have a hollow cylindrical shape. In one embodiment, the first roller (26) may be designed to have a smaller diameter than the first cylinder (23). In one embodiment, the first roller (26) may be arranged inside the first cylinder (23) and may be arranged to surround a shaft (33) penetrating the first cylinder (23). In this case, the first roller (26) may rotate along the inner surface of the first cylinder (23) in the inner space (not shown) of the first cylinder (23) when the shaft (33) rotates, thereby compressing the refrigerant.

[0064] In one embodiment, the second roller (27) may have a hollow cylindrical shape. In one embodiment, the second roller (27) may be designed to have a smaller diameter than the second cylinder (24). In one embodiment, the second roller (27) may be arranged inside the second cylinder (24) and may be arranged to surround a shaft (33) penetrating the second cylinder (24). In this case, the second roller (27) may rotate along the inner surface of the second cylinder (24) in the inner space (not shown) of the second cylinder (24) when the shaft (33) rotates, thereby compressing the refrigerant.

[0065] In describing the compression device (20) with reference to this drawing, the compression device (20) is described based on a two-cylinder type compression device provided with two cylinders (23, 24), but the present disclosure is not limited thereto, and even when one cylinder or a plurality of cylinders (3 or more) are provided, the description of the present disclosure described below can be applied substantially identically or similarly.

[0066] According to one embodiment, the driving device (30) may include a stator (or stator) (31) fixed to the inner surface of the case (10), a rotor (or rotor) (32) rotatably disposed inside the stator (31), and a shaft (33) provided to penetrate the rotor (32) and to be rotatable together with the rotor (32).

[0067] According to one embodiment, the driving device (30) can rotate the rotor (32) by utilizing the electromagnetic interaction between the stator (31) and the rotor (32), and transmit the rotational force of the rotor (32) to the compression device (20) through the shaft (33) to operate the compression device (20).

[0068] In one embodiment, the shaft (33) may pass through the flanges (21, 22), the cylinders (23, 24) and the intermediate plate (25) of the compression device (20). In one embodiment, the shaft (33) may include eccentric portions (331, 332) that contact each of the first roller (26) and the second roller (27) and have axes that are offset from the central axis of the shaft (33). When the shaft (33) rotates, each of the rollers (26, 27) is caused to rotate eccentrically or pivotally by the eccentric portions (331, 332). In one embodiment, the shaft (33) may include oil holes (333) that pass through the central axis of the shaft (33) and extend in the vertical direction. In this case, when the shaft (33) rotates, the oil stored inside the case (10) rises along the oil hole (333) and is supplied into the compression device (20) through the oil path (not shown) provided in the shaft (33).

[0069] FIG. 3 is a perspective view of the main body of a case according to one embodiment of the present disclosure.

[0070] FIG. 4 is a cross-sectional view taken along line I-I' shown in FIG. 3 according to one embodiment of the present disclosure.

[0071] According to one embodiment, the case (10) may include an oil trap (100) that separates refrigerant and oil or captures the separated oil when the compressor (e.g., compressor (1) of FIG. 1) is operated.

[0072] The configuration of the oil trap unit (100) of FIGS. 3 and 4 may be partially or entirely identical to the configuration of the oil trap unit (100) of FIGS. 1 and 2. The embodiments of FIGS. 3 and 4 may be optionally combined with the embodiments of FIGS. 1 and 2 and the embodiments of FIGS. 5 to 13.

[0073] According to one embodiment, the oil trap part (100) may be configured to have a convex outer surface of the case (10) and a hollow relief (or embossing) structure. In one embodiment, the outer surface of the oil trap part (100) may protrude from the outer surface of the main body (11) of the case (10). In one embodiment, the inner surface of the oil trap part (100) may be recessed from the inner surface (112) of the main body (11) of the case (10). The outer surface and / or the inner surface of the oil trap part (100) may form a step with the outer surface (111) and / or the inner surface (112) of the main body (11). A space (106) in which oil is received when the compressor (1) operates may be formed on the inner surface of the oil trap part (100).

[0074] According to one embodiment, the oil trap unit (100) may be disposed in at least one of a plurality of regions (e.g., S1, S2, S3, S4 of FIG. 2). For example, the oil trap unit (100) may be disposed in an upper cavity region (S1) where refrigerant and / or oil flow is formed when the compressor (1) operates, among the plurality of regions (S1, S2, S3, S4).

[0075] According to one embodiment, the oil trap section (100) may be provided in multiple units. In one embodiment, the multiple oil trap sections (100a, 100b, 100c, 100d) may be spaced apart from each other along the perimeter of the main body (11) of the case (10).

[0076] According to one embodiment, the oil trap section (100) may include a plurality of walls (101, 102, 103, 104, 105) that surround a space (106) in which oil is received and define the space (106). According to one embodiment, the plurality of walls (101, 102, 103, 104, 105) may include a front wall (101) that forms a front surface of the oil trap section (100), an upper wall (102) that forms an upper surface of the oil trap section (100), a lower wall (103) that forms a lower surface of the oil trap section (100), and side walls (104, 105) that form a side surface of the oil trap section (100).

[0077] According to one embodiment, the front wall (101) of the oil trap portion (100) may have a square shape, but the present disclosure is not limited thereto, and the front wall (101) of the oil trap portion (100) may also have a polygonal shape including a circle or a square.

[0078] According to one embodiment, the upper wall (102) of the oil trap section (100) may have a horizontal surface to prevent oil contained in the space (106) of the oil trap section (100) from flowing to the discharge pipe (e.g., the discharge pipe (14) of FIG. 1). For example, the upper wall (102) of the oil trap section (100) may be arranged substantially perpendicular to the outer surface (111) and / or the inner surface (112) of the main body (11) of the case (10).

[0079] According to one embodiment, the lower wall (103) of the oil trap section (100) may have an inclined surface for guiding oil contained in the space (106) of the oil trap section (100) to the lower portion of the case (10). For example, the lower wall (103) of the oil trap section (100) may be arranged to be inclined with respect to the outer surface (111) and / or the inner surface (112) of the main body (11) of the case (10).

[0080] According to one embodiment, the side walls (104, 105) of the oil trap section (100) may be arranged to have a predetermined angle (θ) with respect to the outer surface (111) and / or the inner surface (112) of the main body (11) of the case (10). For example, the side walls (104, 105) of the oil trap section (100) may be arranged to form an angle within a range of 90 to 120 degrees with respect to the outer surface (111) and / or the inner surface (112) of the main body (11) of the case (10). When the compressor (1) is operated, the oil contained in the space (106) of the oil trap section (100) can be restricted or reduced from escaping from the space (106) due to the flow of refrigerant and / or oil.

[0081] In general, when the compressor (1) is in operation, for example, when the driving device (30) is in operation (or rotated), oil having a higher density than the refrigerant may be adsorbed to the inner surface (112) of the case (10) by centrifugal force. The adsorbed oil may flow downward along the inner surface (112) of the case (10) and be recovered to the lower portion of the case (10). However, after a predetermined period of time has elapsed since the compressor (1) has been in operation, the oil separated from the refrigerant may no longer be adsorbed to the inner surface (112) of the case (10) due to the oil adsorbed to the inner surface (112) of the case (10) and may be discharged to the outside of the compressor (1) together with the refrigerant.

[0082] According to one embodiment of the present disclosure, when an oil trap section (100) is provided in a case (10), the structure of the oil trap section (100) provides a space (106) for containing oil inside the case (10), thereby additionally securing the area and / or volume of oil captured by the case (10). Accordingly, the amount (or discharge amount) of oil that is not recovered and discharged together with the refrigerant during operation of the compressor (1) can be reduced.

[0083] FIG. 5 is a drawing comparing fluid flow inside a compressor according to one embodiment of the present disclosure and fluid flow inside a compressor according to a comparative example.

[0084] FIG. 6 is a drawing comparing fluid flow inside a compressor according to one embodiment of the present disclosure and fluid flow inside a compressor according to a comparative example.

[0085] FIG. 7 is a graph comparing the amount of fuel in a compressor according to one embodiment of the present disclosure and the amount of fuel in a compressor according to a comparative example.

[0086] According to one embodiment, the case (10) may include an oil trap (100) that separates refrigerant and oil or captures the separated oil when the compressor (e.g., compressor (1) of FIG. 1) is operated.

[0087] The configuration of the oil trap unit (100) of FIGS. 5 to 7 may be partially or entirely identical to the configuration of the oil trap unit (100) of FIGS. 1 to 4. The embodiments of FIGS. 5 to 7 may be optionally combined with the embodiments of FIGS. 1 to 4 and the embodiments of FIGS. 8 to 13.

[0088] FIG. 5 illustrates the flow of fluid (e.g., refrigerant and / or oil) in each of the comparative example and the exemplary embodiment in a vertical cross-section of the case (10', 10).

[0089] Referring to FIG. 5, when examining the flow of fluid inside a case (10') of a comparative example that does not have an oil trap section (100) and the flow of fluid inside a case (10) of an embodiment that has an oil trap section (100), it can be confirmed that in the case of one embodiment, the stream line length of the fluid is longer than in the comparative example due to the additional area and / or volume secured by the oil trap section (100). In this case, when the compressor (1) is operated, the separation time between the refrigerant and the oil is lengthened due to the lengthened stream line length, so that the separation between the refrigerant and the oil can be facilitated.

[0090] In addition, in one embodiment, the downward flow of fluid within the space of the oil trap section (100) (e.g., space (106) of FIG. 3) during operation of the compressor (1) is formed by the inclined structure of the lower wall (103) of the oil trap section (100), thereby facilitating oil recovery to the lower part of the case (10).

[0091] Figure 6 illustrates the flow of fluids in each of the comparative example and the exemplary embodiment in the cross-sectional direction cut horizontally through the case (10a, 10).

[0092] Referring to FIG. 6, when examining the flow of fluid inside a case (10') of a comparative example that does not have an oil trap section (100) and the flow of fluid inside a case (10) of an embodiment that has an oil trap section (100), it can be confirmed that in the case of one embodiment, the flow velocity near the discharge pipe (14) is reduced compared to the comparative example due to the additional area and / or volume secured by the oil trap section (100). In this case, the amount of fluid directly injected into the discharge pipe (14) during operation of the compressor (1) may be reduced due to the reduced flow velocity.

[0093] In addition, in one embodiment, a vortex is formed within the space (106) of the oil trap section (100), thereby facilitating separation of the refrigerant and oil contained in the space (106), and the fluid contained in the space (106) can be prevented from flowing outside the space (106).

[0094] In general, as described above, after a certain period of time has elapsed after the operation of the compressor (1), the amount of oil (or discharged oil amount) discharged outside the compressor (1) together with the refrigerant increases.

[0095] Referring to FIG. 7, when comparing the oil circulation ratio (OCR) of each of a comparative example without an oil trap unit (100) and an embodiment having an oil trap unit (100), it can be confirmed that the oil circulation ratio increases as the rotation speed (RPS) of the driving device (30) increases in both the comparative example and the embodiment. However, in the case of the embodiment, the amount of oil separated from the refrigerant increases as the rotation speed of the driving device (30) increases when the compressor (1) is operated by the oil trap unit (100), but the separated oil stagnates inside the oil trap unit (100), so it can be confirmed that the oil circulation ratio is lower than that of the comparative example.

[0096] FIG. 8 is a perspective view of a main body of a case according to one embodiment of the present disclosure.

[0097] According to one embodiment, the case (10a) may include an oil trap section (100) that separates refrigerant and oil or captures the separated oil when the compressor (e.g., the compressor (1) of FIG. 1) is operated.

[0098] The configuration of the oil trap section (100) of Fig. 8 may be partially or entirely identical to the configuration of the oil trap section (100) of Figs. 1 to 7. The embodiment of Fig. 8 may be optionally combined with the embodiments of Figs. 1 to 7 and the embodiments of Figs. 9 to 13.

[0099] Referring to FIG. 8, a plurality of oil trap parts (100) may be provided in the main body (11a) of the case (10a) according to one embodiment.

[0100] According to one embodiment, a plurality of oil trap parts (100) may be arranged in groups in at least two areas among a plurality of areas (S1, S2, S3, S4) of the case (10a). In one embodiment, the plurality of oil trap parts (100) may be divided into a first oil trap part group (100-1) arranged in a first area (S1) and a second oil trap part group (100-2) arranged in a third area (S3). In one embodiment, the first oil trap part group (100-1) and the second oil trap part group (100-2) may be arranged to be spaced apart from each other in the vertical direction (e.g., ±z-axis direction) of the main body (11a). In one embodiment, a plurality of oil trap parts (100-1a, 100-1b, 100-1c, 100-1d) belonging to a first oil trap part group (100-1) may be arranged to be spaced apart from each other along the circumferential direction of the main body (11a) within a first region (S1). In one embodiment, a plurality of oil trap parts (100-2a, 100-2b, 100-2c) belonging to a second oil trap part group (100-2) may be arranged to be spaced apart from each other along the circumferential direction of the main body (11a) within a third region (S3). However, the present disclosure is not limited thereto, and the plurality of oil trap part groups may be arranged to be spaced apart from each other in the vertical direction within a range greater than or equal to the upper surface stored in the lower portion of the case (10a).

[0101] FIG. 9 is a perspective view of the main body of a case according to one embodiment of the present disclosure.

[0102] Referring to FIG. 9, the body (11b) of the case (10b) according to one embodiment may be provided with an oil trap (200) for separating refrigerant and oil or capturing separated oil when the compressor (e.g., the compressor (1) of FIG. 1) is in operation.

[0103] The configuration of the oil trap unit (200) of Fig. 9 may be partially or entirely identical to the configuration of the oil trap unit (100) of Figs. 1 to 8. The embodiment of Fig. 9 may be optionally combined with the embodiments of Figs. 1 to 8 and the embodiments of Figs. 10 to 13.

[0104] According to one embodiment, the oil trap part (200) may be configured to have a convex outer surface of the case (10b) and a hollow relief (or, embossing) structure. In one embodiment, the outer surface of the oil trap part (200) may protrude from the outer surface (111) of the main body (11b). In one embodiment, the inner surface of the oil trap part (200) may be recessed from the inner surface (112) of the main body (11b). The outer surface and / or the inner surface of the oil trap part (200) may form a step with respect to the outer surface (111) and / or the inner surface (112) of the main body (11b). In this case, a space (206) in which oil is received inside when the compressor (1) is operated may be formed inside the oil trap part (200).

[0105] According to one embodiment, the oil trap unit (200) may be arranged to span at least one of the plurality of regions (S1, S2, S3, S4). For example, the oil trap unit (200) may be arranged to span all of the plurality of regions (S1, S2, S3, S4), as illustrated in FIG. 9. For example, the oil trap unit (200) may extend in the vertical direction (e.g., ±z-axis direction) of the main body (11b) within the plurality of regions (S1, S2, S3, S4). In this case, the extension length of the oil trap unit (200) may be limited to the upper surface of the oil stored in the lower portion of the case (10b).

[0106] According to one embodiment, a plurality of oil trap sections (200) may be provided. In one embodiment, a plurality of oil trap sections (200a, 200b, 200c, 200d) may be arranged spaced apart from each other along the periphery of the main body (11b) of the case (10b).

[0107] According to one embodiment, the oil trap section (200) may include a plurality of walls (201, 202, 203, 204, 205) surrounding a space (206) in which oil is received and defining the space (206). According to one embodiment, the plurality of walls (201, 202, 203, 204, 205) may include a front wall (201) forming a front surface of the oil trap section (200), an upper wall (202) forming an upper surface of the oil trap section (200), a lower wall (203) forming a lower surface of the oil trap section (200), and side walls (204, 205) forming a side surface of the oil trap section (200).

[0108] According to one embodiment, the front wall (201) of the oil trap portion (200) may have a square shape, but the present disclosure is not limited thereto, and the front wall (201) of the oil trap portion (200) may have a polygonal shape including a circle or a square.

[0109] According to one embodiment, the upper wall (202) of the oil trap section (200) may have a horizontal surface to prevent oil contained in the space (206) of the oil trap section (200) from flowing to the discharge pipe (e.g., the discharge pipe (14) of FIG. 1). For example, the upper wall (202) of the oil trap section (200) may be arranged vertically with respect to the outer surface (111) and / or the inner surface (112) of the main body (11b) of the case (10b).

[0110] According to one embodiment, the lower wall (203) of the oil trap section (200) may have an inclined surface for guiding oil contained in the space (206) of the oil trap section (200) to the lower portion of the case (10b). For example, the lower wall (203) of the oil trap section (200) may be arranged to be inclined with respect to the outer surface (111) and / or the inner surface (112) of the main body (11b) of the case (10b).

[0111] According to one embodiment, the side walls (204, 205) of the oil trap portion (200) may be arranged to have a predetermined angle with respect to the outer surface (111) and / or the inner surface (112) of the main body (11) of the case (10). For example, the side walls (204, 205) of the oil trap portion (200) may be arranged to form an angle within a range of 90 to 120 degrees with respect to the outer surface (111) and / or the inner surface (112) of the main body (11b) of the case (10b).

[0112] FIG. 10 is a cross-sectional view of a compressor according to one embodiment of the present disclosure.

[0113] FIG. 11 is a perspective view of the main body of a case according to one embodiment of the present disclosure.

[0114] Fig. 12 is a perspective view of the main body of a case according to one embodiment of the present disclosure.

[0115] Referring to FIGS. 10 to 12, a case (10c, 10d) according to one embodiment may include an oil trap (300) that separates refrigerant and oil or captures separated oil when a compressor (e.g., compressor (1) of FIG. 1) is operated.

[0116] The configuration of the oil trap unit (300) of FIGS. 10 to 12 may be partially or entirely identical to the configuration of the oil trap units (100, 200) of FIGS. 1 to 9. The embodiments of FIGS. 10 to 12 may be selectively combined with the embodiments of FIGS. 1 to 9 and the embodiments of FIG. 13.

[0117] According to one embodiment, the oil trap part (300) may be configured to have a convex outer surface of the case (10c, 10d) and a hollow relief (or, embossing) structure. In one embodiment, the outer surface of the oil trap part (300) may protrude from the outer surface (111) of the main body (11c, 11d) of the case (10c, 10d). In one embodiment, the inner surface of the oil trap part (300) may be recessed from the inner surface (112) of the main body (11c, 11d) of the case (10c, 10d). The outer surface and / or the inner surface of the oil trap part (300) may form a step with the outer surface (111) and / or the inner surface (112) of the main body (11c, 11d). In this case, a space (304) in which oil is received inside the oil trap section (300) when the compressor (1) is in operation can be formed.

[0118] According to one embodiment, the oil trap unit (300) may be disposed in at least one of the plurality of regions (S1, S2, S3, S4). For example, the oil trap unit (300) may be disposed in the upper cavity region (S1) where refrigerant and / or oil flow is formed when the compressor (1) operates, among the plurality of regions (S1, S2, S3, S4).

[0119] According to one embodiment, the oil trap section (300) may include a plurality of walls (301, 302, 303) that surround a space (304) in which oil is received and define the space (304). According to one embodiment, the plurality of walls (301, 302, 303) may include a side wall (301) that forms a side surface of the oil trap section (300), an upper wall (302) that forms an upper surface of the oil trap section (300), and a lower wall (303) that forms a lower surface of the oil trap section (300).

[0120] According to one embodiment, the side wall (301) of the oil trap portion (300) may extend along the perimeter of the main body (11c). The side wall (301) of the oil trap portion (300) may have a ring shape when viewed from above (e.g., in the +z-axis direction).

[0121] According to one embodiment, the upper wall (302) of the oil trap section (300) may have a horizontal surface to prevent oil contained in the space (304) of the oil trap section (300) from flowing to the discharge pipe (e.g., the discharge pipe (14) of FIG. 1). For example, the upper wall (302) of the oil trap section (300) may be arranged vertically with respect to the outer surface (111) and / or the inner surface (112) of the main body (11c, 11d) of the case (10c, 10d).

[0122] According to one embodiment, the lower wall (303) of the oil trap section (300) may have an inclined surface for guiding oil contained in the space (304) of the oil trap section (300) to the lower portion of the case (10c, 10d). For example, the lower wall (303) of the oil trap section (300) may be arranged to be inclined with respect to the outer surface (111) and / or the inner surface (112) of the main body (11c, 11d) of the case (10c, 10d).

[0123] According to one embodiment, the oil trap unit (300) may be provided in multiple units. In one embodiment, the multiple oil trap units (300a, 300b) may be arranged to be spaced apart from each other along the vertical direction (e.g., ±z-axis direction) of the main body (11d) of the case (10d). For example, the multiple oil trap units (300a, 300b) may include, as illustrated in FIG. 12, a first oil trap unit (300a) arranged in a first region (S1), and a second oil trap unit (300b) arranged in a third region (S3) and spaced apart from the first oil trap unit (300a) in the vertical direction.

[0124] Fig. 13 is a perspective view of the main body of a case according to one embodiment of the present disclosure.

[0125] Referring to FIG. 13, a case (10e) according to one embodiment may include an oil trap section (400) that separates refrigerant and oil or captures separated oil when a compressor (e.g., compressor (1) of FIG. 1) is operated.

[0126] The configuration of the oil trap section (400) of Fig. 13 may be partially or entirely identical to the configuration of the oil trap sections (100, 200, 300) of Figs. 1 to 12. The embodiment of Fig. 13 may be optionally combined with the embodiments of Figs. 1 to 12.

[0127] According to one embodiment, the oil trap part (400) may be configured to have a convex outer surface of the case (10e) and a hollow relief (or, embossing) structure. In one embodiment, the outer surface of the oil trap part (400) may protrude from the outer surface (111) of the main body (11e) of the case (10e). In one embodiment, the inner surface of the oil trap part (400) may be recessed from the inner surface (112) of the main body (11e) of the case (10e). The outer surface and / or the inner surface of the oil trap part (400) may form a step with respect to the outer surface (111) and / or the inner surface (112) of the main body (11e). In this case, a space (404) in which oil is received inside when the compressor (1) is operated may be formed inside the oil trap part (400).

[0128] According to one embodiment, the oil trap part (400) may be arranged to span at least one of the plurality of regions (S1, S2, S3, S4). For example, the oil trap part (400) may be arranged to span all of the plurality of regions (S1, S2, S3, S4), as illustrated in FIG. 13. For example, the oil trap part (400) may extend in the vertical direction (e.g., ±z-axis direction) of the main body (11d) to have a spiral shape. At this time, the extension length of the oil trap part (400) may be limited to the upper surface of the oil stored in the lower portion of the case (10d).

[0129] According to one embodiment, the oil trap section (400) may include a plurality of walls (401, 402, 403) surrounding a space (404) in which oil is received and defining the space (404). According to one embodiment, the plurality of walls (401, 402, 403) may include a side wall (401) forming a side surface of the oil trap section (400), an upper wall (402) forming an upper surface of the oil trap section (400), and a lower wall (403) forming a lower surface of the oil trap section (400).

[0130] According to one embodiment, the side wall (401) of the oil trap section (400) may extend in an up-down direction (e.g., +z-axis direction) with a predetermined slope along the periphery of the main body (11e).

[0131] According to one embodiment, the upper wall (402) of the oil trap section (400) may have a horizontal surface to prevent oil contained in the space (404) of the oil trap section (400) from flowing to the discharge pipe (e.g., the discharge pipe (14) of FIG. 1). For example, the upper wall (402) of the oil trap section (400) may be arranged vertically with respect to the outer surface (111) and / or the inner surface (112) of the main body (11e) of the case (10e).

[0132] According to one embodiment, the lower wall (403) of the oil trap section (400) may have an inclined surface for guiding oil contained in the space (404) of the oil trap section (100) to the lower portion of the case (10e). For example, the lower wall (403) of the oil trap section (400) may be arranged to be inclined with respect to the outer surface (111) and / or the inner surface (112) of the main body (11e) of the case (10e).

[0133] A compressor (1) according to one embodiment of the present disclosure may include a case (10) for storing oil therein, a compression device (20) disposed inside the case (10) for compressing refrigerant introduced into the case (10), a driving device (30) disposed inside the case (10) for driving the compression device (20), and an oil trap part (100, 200, 300, 400) for separating refrigerant and oil or collecting separated oil when the compression device (20) is operated. The oil trap part (100, 200, 300, 400) may protrude from an outer surface (111) of the case (10) and be recessed from an inner surface (112) of the case (10) to form a space (106, 206, 304, 404) for accommodating the oil. The above oil trap section (100, 200, 300, 400) may be located at least in a cavity area (S1, S3) of the case where the compression device (20) and the driving device (30) are not disposed.

[0134] According to one embodiment, the oil trap section (100, 200) may include a plurality of walls (101, 102, 103, 104, 105, 201, 202, 203, 204, 205) surrounding and defining the space (106, 206). The plurality of walls (101, 102, 103, 104, 105, 201, 202, 203, 204, 205) may include a front wall (101, 201), an upper wall (102, 202), a lower wall (103, 203), and a side wall (104, 105, 204, 205).

[0135] According to one embodiment, among the plurality of walls (101, 102, 103, 104, 105, 201, 202, 203, 204, 205), the front wall (101, 201) may have a circular or polygonal shape.

[0136] According to one embodiment, the upper wall (102, 202) among the plurality of walls (101, 102, 103, 104, 105, 201, 202, 203, 204, 205) may have a horizontal surface for blocking the flow of oil contained in the space (106, 206) toward the upper portion of the case (10).

[0137] According to one embodiment, among the plurality of walls (101, 102, 103, 104, 105, 201, 202, 203, 204, 205), the lower wall (103, 203) may have an inclined surface for guiding oil contained in the space (106, 206) to the lower portion of the case (10).

[0138] According to one embodiment, the angle between the outer surface (111) of the case (10) and the side wall (104, 105, 204, 205) of the oil trap section (100, 200) can be designed in the range of 90 degrees to 120 degrees.

[0139] According to one embodiment, the oil trap parts (100, 200) may be provided in multiple numbers. The multiple oil trap parts (100, 200) may be spaced apart from each other along the circumferential direction of the case (10).

[0140] According to one embodiment, the oil trap section (100, 200) may extend vertically along the length direction of the case (10).

[0141] According to one embodiment, the oil trap portion (400) may extend obliquely along the length direction of the case to have a spiral shape.

[0142] According to one embodiment, the extension length of the oil trap section (200, 400) may be limited to the upper surface of the oil stored inside the case (10).

[0143] According to one embodiment, the oil trap portions (100, 300) may be provided in multiple numbers. The multiple oil trap portions (100, 300) may be spaced apart from each other along the longitudinal direction of the case (10).

[0144] According to one embodiment, the oil trap portion (300) may extend along the circumferential direction of the case (10).

[0145] According to one embodiment of the present disclosure, a home appliance that controls temperature through heat exchange with the outside using a refrigerant may include a compressor (1) for compressing the refrigerant. The compressor (1) may include a case (10) that stores oil therein, a compression device (20) disposed inside the case (10) for compressing the refrigerant introduced into the case (10), a driving device (30) disposed inside the case (10) for driving the compression device (20), and an oil trap (100, 200, 300, 400) for separating the refrigerant and oil or collecting the separated oil when the compression device (20) is operated. The oil trap portion (100, 200, 300, 400) may protrude from the outer surface (111) of the case (10) and be sunken from the inner surface (112) of the case (10) to form a space (106, 206, 304, 404) for receiving the oil. At least a portion of the oil trap portion (100, 200, 300, 400) may be located in a cavity area (S1, S3) of the case where the compression device (20) and the driving device (30) are not arranged.

[0146] According to one embodiment, the oil trap section (100, 200) may include a plurality of walls (101, 102, 103, 104, 105, 201, 202, 203, 204, 205) surrounding and defining the space (106, 206). The plurality of walls (101, 102, 103, 104, 105, 201, 202, 203, 204, 205) may include a front wall (101, 201), an upper wall (102, 202), a lower wall (103, 203), and a side wall (104, 105, 204, 205).

[0147] According to one embodiment, among the plurality of walls (101, 102, 103, 104, 105, 201, 202, 203, 204, 205), the front wall (101, 201) may have a circular or polygonal shape.

[0148] According to one embodiment, the upper wall (102, 202) among the plurality of walls (101, 102, 103, 104, 105, 201, 202, 203, 204, 205) may have a horizontal surface for blocking the flow of oil contained in the space (106, 206) toward the upper portion of the case (10).

[0149] According to one embodiment, among the plurality of walls (101, 102, 103, 104, 105, 201, 202, 203, 204, 205), the lower wall (103, 203) may have an inclined surface for guiding oil contained in the space (106, 206) to the lower portion of the case (10).

[0150] According to one embodiment, the angle between the outer surface (111) of the case (10) and the side wall (104, 105, 204, 205) of the oil trap section (100, 200) can be designed in the range of 90 degrees to 120 degrees.

[0151] According to one embodiment, the oil trap portion (400) may extend obliquely along the length direction of the case to have a spiral shape.

[0152] According to one embodiment, the oil trap portion (300) may extend along the circumferential direction of the case (10).

[0153] While the present disclosure has been shown and described with reference to various embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents.

Claims

1. In the compressor (1), A case (10) for storing oil inside; A compression device (20) positioned inside the case (10) and configured to compress refrigerant introduced into the case (10); A driving device (30) arranged inside the case (10) and driving the compression device (20); and It includes an oil trap section (100, 200, 300, 400) for separating refrigerant and oil or capturing separated oil during operation of the above compression device (20). The above oil trap section (100, 200, 300, 400) protrudes from the outer surface (111) of the case (10) and is sunken into the inner surface (112) of the case (10) to form a space (106, 206, 304, 404) for receiving the oil. A compressor in which the above oil trap section (100, 200, 300, 400) is located, at least in part, in a cavity area (S1, S3) of the case where the compression device (20) and the driving device (30) are not arranged.

2. In paragraph 1, The above oil trap section (100, 200) includes a plurality of walls (101, 102, 103, 104, 105, 201, 202, 203, 204, 205) surrounding the space (106, 206) and defining the space (106, 206), A compressor, wherein the plurality of walls (101, 102, 103, 104, 105, 201, 202, 203, 204, 205) include a front wall (101, 201), an upper wall (102, 202), a lower wall (103, 203), and a side wall (104, 105, 204, 205).

3. In paragraph 2, A compressor, wherein the upper wall (102, 202) among the plurality of walls (101, 102, 103, 104, 105, 201, 202, 203, 204, 205) has a horizontal surface for blocking the flow of oil contained in the space (106, 206) to the upper part of the case (10).

4. In paragraph 2 or 3, A compressor, wherein the lower wall (103, 203) among the plurality of walls (101, 102, 103, 104, 105, 201, 202, 203, 204, 205) has an inclined surface for guiding oil contained in the space (106, 206) to the lower part of the case (10).

5. In any one of paragraphs 1 to 4, The above oil trap section (100, 200) is provided in multiple units. A compressor in which the above-mentioned plurality of oil trap sections (100, 200) are spaced apart from each other along the circumferential direction of the case (10).

6. In any one of paragraphs 1 to 5, The above oil trap section (100, 200) is a compressor that extends vertically along the length direction of the case (10).

7. In paragraph 1, The above oil trap section (400) is a compressor that extends obliquely along the length direction of the case (10) so as to have a spiral shape.

8. In paragraph 1, The above oil trap section (100, 300) is provided in multiple units. A compressor in which the above-mentioned plurality of oil trap sections (100, 300) are spaced apart from each other along the length direction of the case (10).

9. In paragraph 1, The above oil trap section (300) is a compressor that extends along the circumferential direction of the case (10).

10. In home appliances that control temperature through heat exchange with the outside using a refrigerant, Includes a compressor (1) for compressing refrigerant, The above compressor (1) is, A case (10) for storing oil inside; A compression device (20) positioned inside the case (10) and configured to compress refrigerant introduced into the case (10); A driving device (30) arranged inside the case (10) and driving the compression device (20); and It includes an oil trap section (100, 200, 300, 400) for separating refrigerant and oil or capturing separated oil during operation of the above compression device (20). The above oil trap section (100, 200, 300, 400) protrudes from the outer surface (111) of the case (10) and is sunken into the inner surface (112) of the case (10) to form a space (106, 206, 304, 404) for receiving the oil. The above oil trap section (100, 200, 300, 400) is a home appliance, wherein at least a part of the oil trap section (100, 200, 300, 400) is located in a cavity area (S1, S3) of the case where the compression device (20) and the driving device (30) are not arranged.

11. In paragraph 10, The above oil trap section (100, 200) includes a plurality of walls (101, 102, 103, 104, 105, 201, 202, 203, 204, 205) surrounding the space (106, 206) and defining the space (106, 206), An appliance, wherein the plurality of walls (101, 102, 103, 104, 105, 201, 202, 203, 204, 205) include a front wall (101, 201), an upper wall (102, 202), a lower wall (103, 203), and a side wall (104, 105, 204, 205).

12. In clause 10 or 11, An electrical appliance, wherein the upper wall (102, 202) among the plurality of walls (101, 102, 103, 104, 105, 201, 202, 203, 204, 205) has a horizontal surface for blocking the flow of oil contained in the space (106, 206) to the upper part of the case (10).

13. In any one of paragraphs 10 to 12, An electrical appliance, wherein the lower wall (103, 203) among the plurality of walls (101, 102, 103, 104, 105, 201, 202, 203, 204, 205) has an inclined surface for guiding oil contained in the space (106, 206) to the lower part of the case (10).

14. In paragraph 10, The above oil trap section (400) is an electrical appliance that extends obliquely along the length of the case so as to have an overall spiral shape.

15. In paragraph 10, The above oil trap section (300) is a home appliance that extends along the circumferential direction of the case (10).

Images