Scroll compressor

Abstract

The present invention provides a scroll compressor comprising: a casing the inner space of which is sealed; a driving unit provided with a stator fixed in the inner space and a rotor that is rotated inside the stator; a rotary shaft rotatably coupled to the rotor; and a compressor unit provided with an orbiting scroll installed so as to allow orbiting about the rotary shaft, and a fixed scroll coupled so as to be engaged with the orbiting scroll and forming a compression chamber between the orbiting and fixed scrolls; and a separator, comprising a refrigerant suction pipe connected to the casing to allow refrigerant to be provided to the compression chamber, for separating foreign substances from the refrigerant via centrifugal force and collecting on the bottom, and providing the separated refrigerant to the compression chamber through the refrigerant suction pipe.

Description

scroll compressor

[0001] The present invention relates to a scroll compressor, and more particularly, to a scroll compressor that prevents moisture or foreign substances from entering a suction portion.

[0002] A scroll compressor is a combination of a rotating scroll and a non-rotating scroll that are interlocked and combined, and the rotating scroll rotates relative to the non-rotating scroll to form a pair of compression chambers.

[0003] The compression chamber is composed of a suction chamber formed on the periphery, an intermediate chamber formed continuously from the suction chamber with a gradually decreasing volume toward the center, and a discharge chamber extending toward the center of the intermediate chamber. Typically, the suction chamber is formed by penetrating the side of the non-orbiting scroll, the intermediate chamber is sealed, and the discharge chamber is formed by penetrating the plate portion of the non-orbiting scroll.

[0004] Scroll compressors can be categorized as low-pressure and high-pressure types, depending on the refrigerant suction path. In a low-pressure type, the refrigerant suction pipe is connected to the internal space of the casing, so that the low-temperature suction refrigerant passes through the internal space of the casing and is guided to the suction pressure chamber. In a high-pressure type, the refrigerant suction pipe is directly connected to the suction pressure chamber, so that the refrigerant is guided directly to the suction pressure chamber without passing through the internal space of the casing.

[0005] Patent Document 1 (Patent Publication No. 10-2000-0051153, August 16, 2000) discloses an oil discharge reduction device for a scroll compressor, characterized by including a fixed scroll and an orbiting scroll that are interlocked with each other to form a plurality of compression chambers so that refrigerant gas can be compressed, a suction pipe that sucks a mixed fluid of refrigerant gas and oil into the compressor so that refrigerant gas is supplied to the compression chambers of the fixed scroll and the orbiting scroll, a suction baffle that is installed on the outlet side of the suction pipe so that the mixed fluid can collide when the mixed fluid is sucked and separates some of the oil from the mixed fluid, and an auxiliary separation means that is installed between the outlet of the suction pipe and the suction baffle and effectively separates the oil from the refrigerant gas by utilizing the difference in physical properties between the refrigerant gas and the oil.

[0006] Meanwhile, the front end of a scroll compressor, which has a different structure from Patent Document 1, may be equipped with a high pack that acts as a filter to prevent foreign substances from entering the compression section. A suction mesh is attached to the inside of the high pack. The suction mesh prevents foreign substances existing inside the compressor, piping, and heat exchanger from floating inside the cycle along with the refrigerant flow and then entering the compressor. To achieve this purpose, the suction mesh is designed with an appropriate wire diameter and wire spacing.

[0007] Meanwhile, the refrigerant discharged after compression by the compressor undergoes a condensation process in a heat exchanger, expansion in an expansion valve, and evaporation in the heat exchanger before being sucked back into the compressor, forming a closed-circuit structure. The refrigerant vaporized through the evaporation process passes through an accumulator and high pack located in the front end of the compressor and is then introduced into the compressor suction section through a pipe connected to the compressor suction section.

[0008] To prevent moisture or foreign substances contained in the refrigerant from entering the interior of the compressor during operation of the compressor, a suction mesh is installed in the suction part. This suction mesh functions to remove condensed moisture or foreign substances contained in the refrigerant.

[0009] However, if condensation or foreign substances accumulate on the suction mesh, it will obstruct the flow of refrigerant, and if the suction mesh is removed, there is a problem in that it cannot perform its function or completely blocks the flow of refrigerant.

[0010] Therefore, there is a need for a structure other than a suction mesh that can separate condensed moisture and foreign substances from the refrigerant.

[0011] The present invention has been devised to solve the above problems, and one object of the present invention is to provide a scroll compressor having a structure capable of separating condensed moisture and foreign substances from a refrigerant by a structure other than a conventional suction mesh.

[0012] Another object of the present invention is to provide a structure that prevents condensed moisture and foreign substances from entering without obstructing the flow of refrigerant.

[0013] Another object of the present invention is to provide a structure having a flow path through which refrigerant can flow smoothly.

[0014] Another object of the present invention is to provide a structure capable of easily separating condensed moisture and foreign substances from a refrigerant.

[0015] In order to solve the above problem, the scroll compressor of the present invention includes a casing having a sealed internal space; a driving unit having a stator fixed to the internal space and a rotor rotated inside the stator; a rotating shaft rotatably coupled to the rotor; a compression unit having an orbiting scroll installed to be rotatable around the rotating shaft and a fixed scroll coupled to be engaged with the orbiting scroll to form a compression chamber between the orbiting scrolls; and a refrigerant suction pipe connected to the casing so as to enable supply of refrigerant to the compression chamber, and a separator that separates foreign substances from the refrigerant by centrifugal force and collects them at the bottom, and enables supply of the separated refrigerant to the compression chamber through the refrigerant suction pipe.

[0016] Due to this, the present invention prevents condensed moisture or foreign substances from entering the interior of the compressor without obstructing the flow of refrigerant, thereby improving the performance and reliability of the compressor.

[0017] According to an example related to the present invention, the separator may include a body portion having a cylindrical shape so that refrigerant gas containing foreign substances can flow on the inner surface under centrifugal force; a first flow pipe having a flow path through which gas containing foreign substances flows into the interior of the body portion; and a second flow pipe for discharging gas from which foreign substances are separated inside the body portion so as to be provided into the interior of the compressor.

[0018] In particular, the present invention, unlike the conventional filter method in which condensed moisture or foreign substances accumulate, separates the refrigerant including foreign substances introduced through the first flow pipe inside the body by a centrifugal separation method and discharges it through the second flow pipe, thereby separating foreign substances without disturbing the flow of the refrigerant.

[0019] The above first flow pipe may have a bending portion formed by bending toward the inner surface of the body portion.

[0020] The refrigerant containing foreign substances is guided to flow to the inner surface of the body through the first flow pipe by the bending section, so that the flow can be facilitated along the circumferential direction.

[0021] Preferably, the second flow pipe may include at least two bent portions.

[0022] Due to this, the second flow pipe can form a longer path inside the body, and the refrigerant inside the second flow pipe can sufficiently separate foreign substances.

[0023] The second flow pipe may include a first pipe section extending in the first direction and into which refrigerant gas separated from foreign substances inside the body section flows; a second pipe section connected to the first pipe section and connected to the refrigerant suction pipe so as to be able to supply the refrigerant gas separated from foreign substances to the compression chamber; and a bending connection pipe section provided between the first pipe section and the second pipe section and including a bent portion.

[0024] Due to this, the second flow pipe can form a longer path by the first and second pipe sections and the bending connection pipe section inside the body section, and the refrigerant inside the second flow pipe can be sufficiently separated from foreign substances.

[0025] The second pipe section may be arranged in the first direction parallel to the first pipe section.

[0026] The first and second pipes are arranged in a parallel direction to each other, so that a path can be secured through which the refrigerant can sufficiently separate foreign substances from the inside of the second flow pipe.

[0027] At least one of the first and second pipe sections may be arranged to be greater than half the height of the body section in the first direction.

[0028] The first and second pipes are arranged to be greater than half the height of the body, so that a path can be secured within the second flow pipe through which the refrigerant can sufficiently separate foreign substances.

[0029] The first pipe part may be arranged near the center inside the body part, and the second pipe part may be arranged at the side inside the body part.

[0030] Due to this, the refrigerant with foreign substances separated can be efficiently introduced into the second flow pipe, secure a sufficient flow distance for separation, and can be introduced into the compression chamber through the refrigerant suction pipe.

[0031] The above separator includes a foreign matter separation member that guides condensed moisture or foreign matter that has not reached the bottom to be deposited on the lower part of the body part, and the foreign matter separation member may include an inclined member installed inside the body part so as to be inclined toward the inner surface of the body part.

[0032] Preferably, the foreign matter separation member may further include a separation portion provided on the edge of the inclined portion and spaced apart from the inner surface of the body portion.

[0033] Due to this, the foreign matter separation member can guide the foreign matter to pass through the inner surface of the body and collect on the floor by colliding with the condensed moisture or foreign matter that has not reached the floor and causing it to flow in a diagonal direction.

[0034] The above-mentioned inclined portion may have a through hole that is connected to the second flow pipe.

[0035] By means of the through hole, the second flow pipe can be connected to the inclined portion.

[0036] The above separator is provided with a foreign matter discharge port that is installed at the bottom of the body and has a discharge path that enables discharge of condensed moisture or foreign matter collected at the bottom of the body, and an opening / closing part that opens and closes the discharge path of the foreign matter discharge port to enable discharge of condensed moisture or foreign matter collected at the bottom of the body.

[0037] This allows for the discharge or blocking of condensed moisture or foreign substances accumulated at the bottom of the body of the separator.

[0038] The second flow pipe may be arranged at least partially near the bottom of the body portion, and a portion of the second flow pipe arranged near the bottom may be provided with a refrigerant inlet hole that allows the introduction of refrigerant layered on the bottom of the body portion.

[0039] By means of the refrigerant inlet hole, the liquid refrigerant that may accumulate at the bottom of the body can be introduced into the interior of the second flow pipe, thereby being supplied to the compressor.

[0040] The above separator may further include a mesh that is arranged between one side of a first flow pipe that provides a path that allows the refrigerant containing foreign substances to flow into the interior of the body part, and one side of a second flow pipe through which the refrigerant with foreign substances separated flows, thereby enabling additional separation of foreign substances from the refrigerant.

[0041] By the mesh, a portion of the refrigerant that has passed through the first flow pipe and flowed into the body portion may be deposited downward as condensed moisture or foreign substances due to centrifugal force, and the condensed moisture or foreign substances that are not separated by the centrifugal force may have their flow restricted and fall downward. In addition, the condensed moisture or foreign substances that have fallen downward by the mesh may fall onto the foreign substance separation member and flow laterally along the inclined portion, thereby accumulating on the bottom surface of the body portion.

[0042] Preferably, the mesh can be arranged so that at least one of the first flow pipe and the second flow pipe penetrates through it.

[0043] The scroll compressor of the present invention separates foreign substances from the refrigerant by a separator and supplies them to a compression chamber, thereby preventing condensed moisture or foreign substances from entering the interior of the compressor without interfering with the flow of the refrigerant, thereby improving the performance and reliability of the compressor.

[0044] The scroll compressor of the present invention can separate foreign substances without disturbing the flow of refrigerant by applying a centrifugal separation method, unlike the conventional filter method in which condensed moisture or foreign substances accumulate, and can be used permanently because there is no risk of removal like a filter.

[0045] The scroll compressor of the present invention can improve the reliability of the system by being equipped with an outlet and valve capable of removing moisture or foreign substances within the system.

[0046] In the scroll compressor of the present invention, the refrigerant introduced through the other side of the first flow pipe is first separated from foreign substances by centrifugal force, and the foreign substances are additionally separated by a foreign substance separation member and a mesh, so that condensed moisture or foreign substances are first and second separated from the refrigerant, thereby preventing them from being introduced into the compressor without disturbing the flow of the refrigerant, and the performance and reliability of the compressor can be improved.

[0047] Fig. 1 is a schematic diagram showing a refrigeration cycle device to which an upper compression scroll compressor according to the present embodiment is applied.

[0048] Fig. 2 is a cross-sectional view illustrating a scroll compressor of the present invention.

[0049] Figure 3 is a perspective view showing an example of a separator structure.

[0050] Fig. 4 is a cutaway perspective view showing an example of a separator structure.

[0051] Figure 5 is a cutaway perspective view showing the bottom of the separator.

[0052] Figure 6 is a cutaway perspective view showing an example in which a foreign matter discharge port is installed at the bottom of a separator.

[0053] Figure 7 is a cutaway perspective view showing an example in which a refrigerant inlet hole is provided in a second flow pipe provided on the inner bottom of a separator.

[0054] Fig. 8 is a perspective view showing an example in which a mesh is provided on the inner upper part of the separator.

[0055] Figure 9 is a cutaway perspective view showing a flow in which a mesh is provided on the inner upper part of a separator and foreign substances are separated from the refrigerant.

[0056] Hereinafter, a scroll compressor (10) related to the present invention will be described in more detail with reference to the drawings.

[0057] In this specification, identical or similar reference numbers are assigned to identical or similar components in different embodiments, and redundant descriptions thereof are omitted.

[0058] Additionally, even if the embodiments are different, a structure applied to one embodiment can be applied to another embodiment as long as there is no structural or functional contradiction.

[0059] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0060] In describing the embodiments disclosed in this specification, if it is determined that a detailed description of a related known technology may obscure the gist of the embodiments disclosed in this specification, the detailed description is omitted.

[0061] The attached drawings are only intended to facilitate understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

[0062] Fig. 1 is a schematic diagram showing a refrigeration cycle device to which an upper compression scroll compressor according to the present embodiment is applied, and Fig. 2 is a cross-sectional view showing the scroll compressor of the present invention.

[0063] Hereinafter, the scroll compressor (10) of the present invention will be described with reference to FIGS. 1 and 2.

[0064] The scroll compressor of the present invention comprises: a casing (110) having a sealed internal space (110a); a driving unit (120) having a stator (121) fixed to the internal space (110a) and a rotor (122) rotated inside the stator (121); a rotating shaft (125) rotatably coupled to the rotor (122); a compression unit having an orbiting scroll (150) installed to be rotatable around the rotating shaft (125) and a fixed scroll (140) coupled to be engaged with the orbiting scroll (150) to form a compression chamber (V) between the orbiting scroll (150); and a refrigerant suction pipe (115) and a separator (190) connected to the casing (110) so as to be able to supply refrigerant to the compression chamber (V).

[0065] The separator (190) separates foreign substances from the gas by centrifugal force and collects them at the bottom, allowing only the separated gas to flow into the scroll compressor (10) through the refrigerant suction pipe (115).

[0066] Foreign substances may have a relatively high density compared to the refrigerant. Therefore, they may be separated by centrifugal force and accumulated at the bottom of the body (191). In addition, as described below, foreign substances may be separated through the outlet pipe (foreign substance discharge port, 195).

[0067] Due to this, the present invention prevents condensed moisture or foreign substances from entering the interior of the compressor without obstructing the flow of refrigerant, thereby improving the performance and reliability of the compressor.

[0068] In particular, the present invention applies a centrifugal separation method, unlike the conventional filter method in which condensed moisture or foreign substances accumulate, so that foreign substances can be separated without disturbing the flow of refrigerant, and since there is no risk of removal like a filter, permanent use is possible.

[0069] For example, the separator (190) may include a cylindrical body (191) that allows refrigerant gas containing foreign substances to flow on the inner surface under centrifugal force, a first flow pipe (192) having a path through which gas containing foreign substances flows into the interior of the body (191), and a second flow pipe (193) that discharges gas from which foreign substances are separated inside the body (191) and provides it to the interior of the compressor.

[0070] In the present invention, the separator (190) may have a structure that prevents foreign substances from entering the inside of the compressor.

[0071] Hereinafter, with reference to FIG. 1, the scroll compressor (10) of the present invention will be first described, and the detailed configuration of the separator (190) will be described later.

[0072] The scroll compressor (10) of the present invention may be an air conditioning scroll compressor (10).

[0073] In addition, the scroll compressor (10) of the present invention, as described below, introduces refrigerant through a suction portion, compresses the refrigerant in a compression portion, and discharges the compressed refrigerant through a discharge port.

[0074] In order to improve the reliability of a compression unit manufactured by precision machining, the present invention provides a separator (190) installed in front of the suction unit where refrigerant is sucked to prevent the inflow of foreign substances, thereby minimizing damage to the compression unit caused by foreign substances.

[0075] The scroll compressor (10) of the present invention is a top compression type scroll compressor (10) as shown in FIG. 1, and is mainly described with respect to the top compression type scroll compressor (10), but is not necessarily limited thereto.

[0076] That is, the scroll compressor (10) of the present invention can also be applied to a lower compression type scroll compressor (10) in which the compression part is placed on the lower side of the electric part (120).

[0077] In addition, the following description will be given as an example an upper compression type scroll compressor (10) in which the electric part (120) and the compression part are arranged in the vertical axial direction, and the compression part is located above the electric part (120).

[0078] In addition, a high-pressure scroll compressor (10) is described as an example, in which a refrigerant suction pipe (115) forming an upper compression type suction passage is directly connected to a compression section, and a refrigerant discharge pipe (116) is connected to the internal space (110a) of a casing (110).

[0079] However, the scroll compressor (10) of the present invention is not necessarily limited to the upper compression type, and can also be applied to the lower compression type in which the compression part is placed on the lower side of the driving part (120).

[0080] The scroll compressor (10) of the present invention may be an inverter scroll compressor (10). In addition, the scroll compressor (10) of the present invention can be operated at low speeds to high speeds. In addition, the scroll compressor (10) of the present invention may be a high-pressure type and an upper compression type.

[0081] A lower compression type scroll compressor (10) is illustrated in FIGS. 1 and 4. As illustrated in FIGS. 1 and 4, the scroll compressor (10) according to the present embodiment can be understood as a lower compression type scroll compressor (10) in which an electric part (120) that forms a driving motor in the internal space (110a) of a casing (110) and generates rotational force is installed on the upper part of the casing (110), and a compression part that receives the rotational force of the electric part (120) and compresses refrigerant is installed on the lower side of the electric part (120).

[0082] The casing (110) has a sealed internal space (110a). For example, a motor (120) may be installed in the middle of the casing (110), and a main frame (130), a rotating scroll (150), and a fixed scroll (140) may be sequentially installed above the motor (120).

[0083] The electric motor (120) is configured to receive electrical energy from the outside and convert it into mechanical energy.

[0084] In addition, the main frame (130), the rotating scroll (150), and the fixed scroll (140) form a compression unit that receives mechanical energy generated from the electric unit (120) and compresses the refrigerant.

[0085] Referring to FIGS. 1 and 4, an example is shown in which the electric motor (120) is coupled to the middle portion between the upper and lower ends of the rotation shaft (125) described later, and the compression unit is coupled to the upper end of the rotation shaft (125). That is, the scroll compressor (10) of the present invention may be an upper compression type structure.

[0086] In summary, the scroll compressor (10) includes an electric motor (120) and a compression unit, and the electric motor (120) and the compression unit are accommodated in the internal space (110a) of the casing (110).

[0087] The casing (110) may include a cylindrical shell (111), an upper shell (112), and a lower shell (113).

[0088] The cylindrical shell (111) can be formed into a cylindrical shape with both ends open.

[0089] An upper shell (112) can be coupled to the upper end of the cylindrical shell (111), and a lower shell (113) can be coupled to the lower end of the cylindrical shell (111).

[0090] That is, the upper and lower ends of the cylindrical shell (111) are respectively combined and covered with the upper shell (112) and the lower shell (113), and the combined cylindrical shell (111), the upper shell (112), and the lower shell (113) form an internal space (110a) of the casing (110). At this time, the internal space (110a) is sealed.

[0091] The internal space (110a) of the sealed casing (110) can be divided into an upper space (110b) provided on the inside of the upper cap (112), an intermediate space (110c) provided on the inside of the cylindrical shell (111), and a lower space (110d) provided on the inside of the lower cap (113). Hereinafter, the upper space (110b) can be defined as a discharge space, the intermediate space (110c) as an oil separation space, and the lower space (110d) as an oil storage space.

[0092] One end of a refrigerant suction pipe (115) is penetrated and connected to a side of the upper shell (112). Specifically, one end of the refrigerant suction pipe (115) is penetrated and connected to the upper shell (112) in the radial direction of the upper shell (112).

[0093] The refrigerant suction pipe (115) penetrates the upper shell (112) and is directly connected to a suction port (not shown) formed on the side of the fixed scroll (140). Therefore, the refrigerant can be introduced into the compression chamber (V) through the refrigerant suction pipe (115).

[0094] A separator (190) is connected to the other end of the refrigerant suction pipe (115).

[0095] The separator (190) is connected to the outlet side of the evaporator via a refrigerant pipe. Accordingly, the refrigerant moving from the evaporator to the separator (190) is directly sucked into the compression chamber (V) through the refrigerant suction pipe (115) after the liquid refrigerant is separated in the separator (190). That is, the separator (190) may be an accumulator that separates the liquid refrigerant from the introduced refrigerant. Meanwhile, the separator (190) may be referred to as a high pack.

[0096] In the past, a suction mesh was installed on the suction section to prevent moisture or foreign substances contained in the refrigerant from flowing into the interior of the compressor during operation of the compressor. This suction mesh functioned to remove condensed moisture or foreign substances contained in the refrigerant. However, if condensed moisture or foreign substances accumulated on the suction mesh, the flow of the refrigerant was obstructed, and if the suction mesh was removed, there was a problem in that the function was not performed or the flow of the refrigerant was completely blocked.

[0097] The scroll compressor (10) of the present invention separates foreign substances from the refrigerant by centrifugal force within the separator (190) and collects them at the bottom, separates condensed moisture and foreign substances from the refrigerant, and supplies the separated refrigerant to the compression chamber through the refrigerant suction pipe (115) through the outlet pipe.

[0098] A refrigerant discharge pipe (116) is connected by penetrating through the intermediate space (110c) of the cylindrical shell (111), specifically between the driving motor (120) and the main frame (130). The refrigerant discharge pipe (116) may be directly inserted into the cylindrical shell (111) and welded thereto, but typically, an intermediate connecting pipe (collar pipe) (not shown) made of the same material as the cylindrical shell (111) may be inserted into the cylindrical shell (111) and welded thereto, and a refrigerant discharge pipe (116) made of a copper pipe may be inserted into the intermediate connecting pipe and welded thereto.

[0099] The refrigerant discharged from the compression section into the internal space (110a) of the casing (110) is discharged to the condenser (not shown) through the refrigerant discharge pipe (116).

[0100] A fixed scroll (140) is installed inside a casing (110). An orbiting scroll (150) is arranged on one side of the fixed scroll (140) so as to be rotatable, and the fixed scroll (140) is configured to form a compression chamber (V) together with the orbiting scroll (150).

[0101] In addition, it is possible to discharge the refrigerant through the discharge port (1412) on one side and the opposite side of the fixed scroll (140).

[0102] Meanwhile, the fixed scroll (140) is provided with a fixed wrap (144). The fixed scroll (140) may further be provided with a sub-axis hole (1431).

[0103] The fixed scroll (140) may include a fixed plate portion (141), a fixed side wall portion (142), a sub-bearing portion (143), and a fixed wrap (144). The detailed structure of the fixed scroll (140) will be described later.

[0104] The orbiting scroll (150) rotates relative to the fixed scroll (140) and is engaged with the fixed wrap (144) to form a compression chamber (V).

[0105] For example, the orbiting scroll (150) may include an orbiting wrap (153) that is interlocked with the fixed wrap of the fixed scroll (140) to form a compression chamber (V), and an orbiting plate portion (151) that is connected to one end of the orbiting wrap (153) and formed with a predetermined width. The detailed structure of the orbiting scroll (150) will be described later.

[0106] The rotation shaft (125) is arranged in one direction inside the casing (110) and is installed to be penetratedly coupled to the inner circumference of the fixed scroll (140) and the orbiting scroll (150), so as to transmit rotational force to enable the orbiting scroll (150) to rotate.

[0107] Referring to FIG. 1, a high-pressure, bottom-compression scroll compressor (10) according to the present embodiment has an electric motor (120) installed in the upper half of a casing (110), and a main frame (130), a fixed scroll (140), and an orbiting scroll (150) are sequentially installed on the lower side of the electric motor (120). Typically, the compression unit may include a main frame (130), a fixed scroll (140), and an orbiting scroll (150).

[0108] The electric motor (120) is coupled to the upper end of the rotation shaft (125) described later, and the compression unit is coupled to the lower end of the rotation shaft (125). Accordingly, the compressor has the lower compression structure described above, and the compression unit is connected to the electric motor (120) by the rotation shaft (125) and operates by the rotational force of the electric motor (120).

[0109] Referring to FIG. 1, a casing (110) according to the present embodiment may include a cylindrical shell (111), an upper shell (112), and a lower shell (113). The cylindrical shell (111) may have a cylindrical shape with both upper and lower ends open, the upper shell (112) may be coupled to cover the opened upper end of the cylindrical shell (111), and the lower shell (113) may be coupled to cover the opened lower end of the cylindrical shell (111).

[0110] Accordingly, the internal space (110a) of the casing (110) is sealed, and the internal space (110a) of the sealed casing (110) is divided into a lower space (110d) and an upper space (110b) based on the electric part (120).

[0111] The lower space (110d) is a space formed on the lower side of the electric part (120), and the lower space (110d) may include a storage space.

[0112] The lower space (110d) is a space formed at the lower side of the compression section, and forms a space where mixed oil mixed with oil or liquid refrigerant is stored.

[0113] The upper space (110b) is a space formed on the upper side of the electric motor (120), and forms an oil separation space in which oil is separated from the refrigerant discharged from the compression unit. A refrigerant discharge pipe (116) is connected to the upper space (110b).

[0114] The aforementioned electric motor (120) and main frame (130) are inserted and fixed inside the cylindrical shell (111). An oil recovery passage may be formed on the outer surface of the electric motor (120) and the outer surface of the main frame (130), which is spaced apart from the inner surface of the cylindrical shell (111) by a preset interval. This will be described later together with the oil recovery passage.

[0115] A refrigerant suction pipe (115) is connected by penetrating the side of the cylindrical shell (111). Accordingly, the refrigerant suction pipe (115) is connected by penetrating the cylindrical shell (111) forming the casing (110) in the radial direction.

[0116] The refrigerant suction pipe (115) is directly connected to the suction port of the fixed scroll (140) that forms the compression section by penetrating one end of the cylindrical shell (111). Accordingly, the refrigerant can be introduced into the compression chamber (V) through the refrigerant suction pipe (115).

[0117] In addition, the other end of the refrigerant suction pipe (115) is connected to a separator (190) outside the cylindrical shell (111). The separator (190) is connected to the outlet side of the evaporator (not shown). Accordingly, the refrigerant moving from the evaporator to the separator (190) is directly sucked into the compression chamber (V) through the refrigerant suction pipe (115) as a gaseous refrigerant after the liquid refrigerant is separated in the separator (190).

[0118] A terminal bracket (not shown) is coupled to the upper half or upper shell (112) of the cylindrical shell (111), and a terminal (not shown) for transmitting external power to the electric part (120) can be connected through the terminal bracket.

[0119] The refrigerant discharge pipe (116) corresponds to a passage through which the compressed refrigerant discharged from the compression section to the internal space (110a) of the casing (110) is discharged to the outside toward the condenser (not shown).

[0120] The refrigerant discharge pipe (116) can be installed so as to be in communication with the intermediate space (110c) located between the driving motor (120) and the compression section, that is, between the upper space (discharge space) (110b) and the lower space (storage space) (110d).

[0121] The refrigerant discharge pipe (116) can be inserted into the internal space (110a) of the casing (110) by a preset length. The portion of the refrigerant discharge pipe (116) that is inserted into the internal space (110a) of the casing (110) is defined as an inner receiving portion (1161), and the inner receiving portion (1161) of the refrigerant discharge pipe (116) can be inserted so as to be located between the drive motor (120) and the main frame (130), more precisely, between the upper portion of the stator coil (1212) of the drive motor (120) and the lower surface of the main frame (130). Accordingly, the refrigerant discharge pipe (116) can be inserted deep into the internal space (110a) of the casing (110) without interfering with the stator coil (1212).

[0122] A check valve (not shown) may be installed in the refrigerant discharge pipe (116) to block the refrigerant discharged from the compressor (10) to the condenser from flowing back to the compressor (10).

[0123] Hereinafter, the electric motor (120) will be described with reference to FIG. 1. The electric motor (120) according to the present embodiment includes a stator (121) and a rotor (122). The stator (121) is inserted and fixed into the inner surface of the cylindrical shell (111), and the rotor (122) is rotatably provided inside the stator (121).

[0124] The stator (121) includes a stator core (1211) and a stator coil (1212).

[0125] The stator core (1211) is formed in a circular or hollow cylindrical shape and is fixed to the inner surface of the cylindrical shell (111) by hot pressing.

[0126] A rotor receiving portion (1211a) is formed in a circular shape through the center of the stator core (1211) into which a rotor (122) is rotatably inserted. On the outer surface of the stator core (1211), a plurality of stator (121)-side oil recovery grooves (1211b) may be formed at predetermined intervals along the circumference in a D-cut shape cut or sunken along the axial direction.

[0127] On the inner surface of the rotor housing (1211a), a number of teeth (not shown) and slots (not shown) are formed alternately along the circumferential direction, and a stator coil (1212) is wound around each tooth by passing through the slots on both sides.

[0128] More precisely, the slot may be a space between adjacent stator coils in the circumferential direction. In addition, the slot forms an internal passage (120a), and an air gap passage is formed between the inner surface of the stator core (1211) and the outer surface of the rotor core (1221) to be described later, and the oil recovery groove (1211b) forms an external passage. The external passage forms an oil recovery passage through which oil separated from the refrigerant in the upper space (110b) and the intermediate space (110c) and oil supplied to the compression unit and then recovered are returned to the lower space (110d).

[0129] The stator coil (1212) is wound around the stator core (1211) and is electrically connected to an external power source through a terminal (not shown) that is connected through the casing (110). An insulator (1213), which is an insulating material, is inserted between the stator core (1211) and the stator coil (1212).

[0130] The insulator (1213) is provided on the outer and inner sides to radially accommodate the bundle of stator coils (1212) and can extend to both sides of the axial direction of the stator core (1211).

[0131] The rotor (122) includes a rotor core (1221) and a permanent magnet (1222).

[0132] The rotor core (1221) is formed in a cylindrical shape and is accommodated in the rotor receiving portion (1211a) formed at the center of the stator core (1211).

[0133] Specifically, the rotor core (1221) is rotatably inserted into the rotor receiving portion (1211a) of the stator core (1211) at a predetermined gap (120a) interval. Permanent magnets (1222) are embedded in the rotor core (1221) at a predetermined interval along the circumference.

[0134] A balance weight (123) may be provided on the upper portion of the rotor core (1221). The balance weight (123) may be coupled to the main shaft (1251) of the rotation shaft (125).

[0135] Additionally, the balance weight (123) rotates together with the rotation of the rotor (122).

[0136] A rotation shaft (125) is coupled to the center of the rotor core (1221). The upper part of the rotation shaft (125) is press-fitted and coupled to the rotor (122), and the lower part of the rotation shaft (125) is rotatably inserted into the main frame (130) and supported in the radial direction.

[0137] Referring to FIG. 2, the rotation shaft (125) according to the present embodiment is press-fitted and coupled to the rotor (122). The upper end of the rotation shaft (125) is rotatably inserted into a main frame (130) to be described later and supported in the radial direction, and the lower end of the rotation shaft (125) is rotatably inserted into a subframe (118) and supported in the radial and axial directions.

[0138] Specifically, the rotation shaft (125) may include a main shaft portion (1251), a main bearing portion (1252), a sub-bearing portion (1253), and an eccentric portion (1254).

[0139] The main shaft portion (1251) is the middle portion of the rotating shaft (125) and is press-fitted and joined to the shaft fixing hole (1221a) provided in the rotor core (1221). A balance weight (180), which will be described later, can be press-fitted and joined to the upper portion of the main shaft portion (1251), i.e., the portion extending from the main bearing portion (1252). The balance weight (180) will be described later together with the oil guide.

[0140] The main bearing portion (1252) is a portion forming the upper end of the rotation shaft (125), and can be rotatably inserted into the main bearing (171) provided in the main frame (130) described later and supported in the radial direction. The outer diameter of the main bearing portion (1252) can be formed to be larger than the outer diameter of the main shaft portion (1251). Accordingly, the portion where the main bearing portion (1252) extends from the main shaft portion (1251) can be formed to be stepped.

[0141] The sub-bearing portion (1253) is a portion forming the lower end of the rotation shaft (125), and can be rotatably inserted into the sub-bearing (172) provided in the sub-frame (118) and supported radially. The outer diameter of the sub-bearing portion (1253) can be formed smaller than the outer diameter of the main shaft portion (1251). Accordingly, a thrust bearing surface that is axially supported by the sub-frame (118) can be formed in a stepped manner between the main shaft portion (1251) and the sub-bearing portion (1253).

[0142] The eccentric portion (1254) is a portion into which the rotation shaft (125) coupling portion (152) of the orbiting scroll (150) described later is inserted, and may be provided in the main bearing portion (1252). For example, the eccentric portion (1254) may be provided on the outer periphery of the main bearing portion (1252). Accordingly, the rotational force of the driving motor (120) is transmitted to the orbiting scroll (150) through the eccentric portion (1254), so that the orbiting scroll (150) can perform a rotational motion.

[0143] An eccentric bearing (173) may be provided on the outer surface of the eccentric portion (1254). The eccentric bearing (173) may be formed as a bushing bearing, like the main bearing (171) and the sub-bearing (172). Although not shown in the drawing, it may also be inserted into the outer surface of the rotating shaft (125) connecting portion (152) of the orbiting scroll (150) described later.

[0144] In addition, an oil supply hole (1255) may be formed inside the rotating shaft (125) by penetrating between the two ends of the rotating shaft (125). The oil supply hole (1255) may be formed by penetrating from the lower end of the rotating shaft (125) to the bottom surface of the eccentric portion (1254). Accordingly, oil stored in the lower space (110d) forming the oil storage space may be supplied to the inside of the eccentric portion (1254) through the oil supply hole (1255).

[0145] Additionally, an oil pickup (126) may be installed at the bottom of the rotating shaft (125), more precisely, at the bottom of the oil supply hole (1255). The oil pickup (126) may be installed so as to be immersed in the oil stored in the oil storage space (110d). Accordingly, the oil stored in the oil storage space (110d) may be pumped by the oil pickup (126) and sucked up through the oil supply hole (1255).

[0146] Referring to FIGS. 2 and 3, the main frame (130) according to the present embodiment is installed on the upper side of the driving motor (120) and is fixed by hot pressing or welding to the inner wall surface of the cylindrical shell (111). Accordingly, the main frame (130) is typically formed of cast iron.

[0147] The main frame (130) includes a main flange portion (131) and a shaft support portion (132).

[0148] The main flange portion (131) is formed in an annular shape and is accommodated in the intermediate space (110c) of the cylindrical shell (111). For example, the outer surface of the main flange portion (131) may be formed in a circular shape and may be in close contact with the inner surface of the cylindrical shell (111). In this case, at least one oil recovery hole (not shown) may be formed between the outer surface and the inner surface of the main flange portion (131) and penetrate in the axial direction.

[0149] In addition, at least one frame fixing projection (not shown) may be formed to extend radially on the outer surface of the main flange portion (131). The outer surface of the frame fixing projection may be fixed in close contact with the inner surface of the cylindrical shell (111). In this case, the frame fixing projections may be spaced apart from each other in the circumferential direction so that a second discharge passage groove (1311) may be formed that penetrates between the axial side surfaces of the main flange portion (131). Accordingly, the upper end of the second discharge passage groove (1311) may be connected to the first discharge passage groove (1421) of the fixed scroll (140) to be described later, and the lower end of the second discharge passage groove (1311) may be connected to the intermediate space (110c) through which the refrigerant discharge pipe (116) is connected.

[0150] The shaft support protrusion (132) extends from the center of the main flange portion (131) toward the driving motor (120), but the outer diameter of the shaft support protrusion (132) is formed smaller than the inner diameter of the oil block (192) to be described later. Accordingly, the shaft support protrusion (132) is accommodated in the oil block (192) to be described later that surrounds the shaft support protrusion (132) at a preset interval.

[0151] An axial support hole (not shown) is formed on the inner side of the axial support protrusion (132). The axial support hole may be formed by penetrating both axial side surfaces of the main flange portion (131). Accordingly, the main flange portion (131) may be formed in an annular shape.

[0152] The shaft support hole may be formed so that the inner diameters of both axial ends are the same. A main bearing (171) may be inserted and fixed into the inner periphery of the shaft support projection (132). The main bearing (171) may be formed as a bush bearing. Accordingly, the inner periphery of the shaft support hole (1321), or more precisely, the inner periphery of the main bearing (171), together with the outer periphery of the main bearing portion (1252) provided on the rotary shaft (125), forms a main bearing surface (171a). The main bearing surface will be described later together with the oil guide.

[0153] Referring to FIGS. 2 and 3, the fixed scroll (140) according to the present embodiment may include a fixed plate portion (141), a fixed side wall portion (142), and a fixed wrap (143).

[0154] The fixed plate portion (141) may be formed in a circular shape. The outer surface of the fixed plate portion (141) may be formed to be in close contact with the inner surface of the upper cap (112) forming the upper space (110b), or may be formed to be spaced apart from the inner surface of the upper cap (112).

[0155] In addition, a suction port (1411) is formed at the edge of the fixed plate (141) in the radial direction and is connected to a suction chamber (not shown), and a refrigerant suction pipe (115) that penetrates the upper cap (112) of the casing (110) can be inserted and connected to the suction port (1411). Accordingly, the refrigerant suction pipe (115) can pass through the upper space (110b) of the casing (110) and be directly connected to the suction port (1411) of the fixed scroll (140).

[0156] In addition, a discharge port (1412) and a bypass hole (not shown) are formed in the center of the fixed plate portion (141), and a discharge valve (145) for opening and closing the discharge port (1412) and a bypass valve (not shown) for opening and closing the bypass hole may be installed on the upper surface of the fixed plate portion (141). Accordingly, the refrigerant compressed in the compression chamber (V) is discharged from the upper side of the fixed scroll (140) to the upper space (110b) formed in the upper cap (112).

[0157] The fixed side wall portion (142) can extend in a ring shape from the edge of the fixed plate portion (141) toward the main frame (130). Accordingly, the fixed side wall portion (142) can be bolted so that its lower surface is in close contact with the upper surface of the main frame (130), i.e., the upper surface of the main flange portion (131).

[0158] At least one first discharge passage groove (1421) may be formed on the outer surface of the fixed side wall portion (142). The first discharge passage groove (1421) may be formed to be recessed in the outer surface of the fixed scroll (140) and to communicate between the axially opposite side surfaces of the fixed scroll (140). For example, the first discharge passage groove (1421) may be formed to communicate from the upper surface of the fixed plate portion (141) to the lower surface of the fixed side wall portion (142). Accordingly, the upper end of the first discharge passage groove (1421) may be communicated with the upper space (110b), and the lower end of the first discharge passage groove (1421) may be communicated with the upper end of the second discharge passage groove (1311) provided in the main frame (130).

[0159] The fixed wrap (143) can extend from the lower surface of the fixed plate portion (141) toward the orbiting scroll (150). The fixed wrap (143) can be formed in various shapes such as an involute. The fixed wrap (143) can be interlocked with the orbiting wrap (153) described later to form a pair of compression chambers (V).

[0160] Referring to FIGS. 2 and 3, the rotary scroll (150) according to the present embodiment may include a rotary plate portion (151), a rotary shaft (125) coupling portion (152), and a rotary wrap (153).

[0161] The pivot plate (151) is formed in a circular shape and is axially supported by the main frame (130) to perform pivotal movement between the main frame (130) and the fixed scroll (140).

[0162] The rotating shaft (125) coupling portion (152) can extend from the geometric center of the orbiting scroll (150) toward the eccentric portion (1254) of the rotating shaft (125). The rotating shaft (125) coupling portion (152) can be rotatably inserted into the eccentric portion (1254) of the rotating shaft (125). Accordingly, the orbiting scroll (150) is rotated by the eccentric portion (1254) of the rotating shaft (125) and the rotating shaft (125) coupling portion (152).

[0163] The turning wrap (153) can extend from the upper surface of the turning plate (151) toward the fixed scroll (140). The turning wrap (153) can be formed in various shapes, such as an involute, to correspond to the fixed wrap (143).

[0164] Fig. 3 is a perspective view illustrating an example of the structure of a separator (190), and Fig. 4 is a cut-away perspective view illustrating an example of the structure of a separator (190). In addition, Fig. 5 is a cut-away perspective view illustrating the bottom of a separator (190), and Fig. 6 is a cut-away perspective view illustrating an example in which a foreign matter discharge port (195) is installed at the bottom of a separator (190). In addition, Fig. 7 is a cut-away perspective view illustrating an example in which a refrigerant inlet hole (193d) is provided in a second flow pipe (193) provided at the inner bottom of a separator (190).

[0165] Hereinafter, the structure of the separator (190) of the present invention will be described.

[0166] In the present invention, the foreign matter may include condensed moisture or foreign matter. In the present invention, the foreign matter has a higher density than the refrigerant and may be deposited on the lower part of the separator (190) by centrifugal force at the inner periphery of the body (191).

[0167] The separator (190) may include a body (191), a first flow pipe (192), and a second flow pipe (193).

[0168] The body (191) may be formed in a cylindrical shape so that the refrigerant gas containing foreign substances can flow on the inner surface under centrifugal force. In addition, it is preferable that the body (191) have a diameter large enough to sufficiently receive centrifugal force and separate foreign substances from the gas, and a height sufficient to ensure a sufficient drop distance.

[0169] FIG. 4 shows an example in which a foreign substance (5) flowing into the interior of a body part (191) through a first flow pipe (192) flows downward under centrifugal force, and an example in which separated refrigerant (6) flows into a second flow pipe (193).

[0170] The first flow pipe (192) has a path through which gas containing foreign substances flows into the interior of the body (191). The first flow pipe (192) may be provided as, for example, a pipe having a predetermined diameter.

[0171] The first flow pipe (192) may be provided with an inlet for introducing gas containing foreign substances from one side. The inlet of the first flow pipe (192) may be arranged on the outside of the body (191).

[0172] The first flow pipe (192) can be arranged on one side inside the body part (191). The first flow pipe (192) can provide gas containing foreign substances to the inside of the body part (191) on one side.

[0173] The first flow pipe (192) may be arranged on the other side outside the body portion (191). The first flow pipe (192) may have a shape extending from the other side in the extension direction of the body portion (191), for example, in a direction parallel to the first direction. The first direction may be the vertical direction in FIGS. 2 and 3.

[0174] One side of the first flow pipe (192) can be placed inside the body part (191). FIGS. 3 and 4 illustrate an example in which one side of the first flow pipe (192) is placed on the inner upper side of the body part (191).

[0175] It is preferable that one side of the first flow pipe (192) be formed so as to face the inner surface of the body portion (191) so that the gas including foreign substances can be subjected to centrifugal force. For example, the first flow pipe (192) may be provided with a bending portion (192a) formed by bending so that one side of the first flow pipe (192) faces the inner surface of the body portion (191).

[0176] The first flow pipe (192) can be advantageously structured to form a centrifugal flow by allowing gas containing foreign substances to flow into the interior of the body (191) through the bending portion (192a).

[0177] However, it is not necessarily limited to this structure, and one side of the first flow pipe (192) may be formed in a structure that is not bent but parallel to one side.

[0178] Through the first flow pipe (192), the condensed moisture (foreign matter) contained in the refrigerant sucked into the interior of the separator (190) adheres to the inner wall by centrifugal force and falls to the bottom to collect, and the separated refrigerant gas flows into the second flow pipe (193) described below and then exits the separator (190).

[0179] The body part (191) is formed into a cylindrical shape so that the suction refrigerant can easily receive centrifugal force, and the first flow pipe (192) is arranged with one side disposed at the upper part of the inside of the body part (191) and facing the inner surface of the body part (191), so that it can be a structure advantageous in separating condensed moisture or foreign substances contained in the suction refrigerant by centrifugal force.

[0180] The suction refrigerant flowing through the first flow pipe (192) is subjected to centrifugal force inside the body (191) and the refrigerant is first separated.

[0181] In this way, the present invention can enable separation of condensed moisture or foreign substances because the refrigerant introduced through the first flow pipe (192) flows along the inner surface of the cylindrical body part (191) under centrifugal force without having to have a suction mesh to prevent the inflow of existing condensed moisture or foreign substances.

[0182] The second flow pipe (193) enables the gas from which foreign substances have been separated inside the body (191) to flow and can be provided to the inside of the compressor.

[0183] The second flow pipe (193) can introduce gas from which foreign substances have been separated from one side, flow the gas inside the second flow pipe (193), and then discharge the gas from the other side to provide it to the inside of the compressor.

[0184] One side of the second flow pipe (193) may be arranged inside the body part (191). In addition, one side of the second flow pipe (193) may be arranged near the center of the upper part of the body part (191), so that gas separated from foreign substances by centrifugal force may flow upward and be introduced. One side of the second flow pipe (193) may be provided in the first pipe part (193a) described later. The other side of the second flow pipe (193) may be arranged outside the body part (191). For this purpose, the second flow pipe (193) may include a portion penetrating one surface of the body part (191). The other side of the second flow pipe (193) may be provided in the second pipe part (193b) described later.

[0185] Referring to FIGS. 3 to 7, an example is shown in which the second flow pipe (193) includes a first pipe section (193a), a second pipe section (193b), and a bending connection pipe section (193c).

[0186] The first pipe section (193a) extends in the first direction and allows refrigerant gas separated from foreign substances to flow into the interior of the body section (191).

[0187] The second pipe section (193b) is connected to the first pipe section (193a) and can be connected to the refrigerant suction pipe (115) so as to provide the refrigerant gas from which foreign substances have been separated to the compression chamber.

[0188] The second pipe section (193b) can be arranged in the first direction parallel to the first pipe section (193a).

[0189] At least one of the first and second pipe sections (193a, 193b) may be arranged to be greater than half the height of the body section (191) in the first direction.

[0190] The bending connecting pipe part (193c) is provided between the first pipe part (193a) and the second pipe part (193b) and may include a bent portion.

[0191] A bending connection pipe (193c) may be provided between one side and the other side of the second flow pipe (193).

[0192] For example, the second flow pipe (193) may be formed into a shape that is bent at least twice, with a bending connection pipe portion (193c) provided. As illustrated in Fig. 7, the second flow pipe (193) may be formed into a U shape.

[0193] Due to this, the second flow pipe (193) allows the gas introduced from one side to flow along the bent flow path and then be discharged to the outside of the body part (191) and provided to the inside of the compressor.

[0194] In addition, since the second flow pipe (193) is formed in a U shape, a sufficient flow distance can be secured for the separated gas refrigerant to flow inside the second flow pipe (193). In addition, since the U-shaped second flow pipe (193) is arranged at the lower part of the body part (191), the liquid refrigerant can be re-introduced through the refrigerant inlet hole (193d). This can further improve the refrigerant separation performance and compressor reliability.

[0195] In the second flow pipe (193), the bending connection pipe part (193c) can be placed at the lower part of the body part (191).

[0196] A refrigerant inlet hole (193d) may be provided in the second flow pipe (193) at the lower portion of the body portion (191). The refrigerant inlet hole (193d) allows liquid refrigerant that may accumulate at the lower portion of the body portion (191) to flow into the interior of the second flow pipe (193), thereby supplying it to the compressor.

[0197] It is preferable that the refrigerant inlet hole (193d) be sized to allow the inflow of liquid refrigerant while preventing the inflow of condensed moisture or foreign substances. The refrigerant inlet hole (193d) may be provided, for example, in the bending connection pipe portion (193c).

[0198] When liquid refrigerant is accumulated at the bottom of the body (191) by the refrigerant inlet hole (193d), it can be introduced into the interior of the second flow pipe (193).

[0199] A foreign matter separation member (194) may be installed in the second flow pipe (193).

[0200] The foreign matter separation member (194) causes condensed moisture or foreign matter that has not reached the bottom to collide with it and flow in a diagonal direction. In addition, the foreign matter separation member (194) can guide the foreign matter to pass through the inner surface of the body part (191) and collect on the bottom.

[0201] The foreign substance separation member (194) may include an inclined portion (194a).

[0202] The inclined portion (194a) may have an inclined surface that slopes toward the inner surface of the body portion (191). The inclined portion (194a) may be installed inside the body portion (191). The inclined portion (194a) causes condensed water or foreign substances that have not reached the bottom to collide with each other and flow diagonally toward the inner surface of the body portion (191).

[0203] The foreign substance separation member (194) may further include a separation portion (194b).

[0204] The separation portion (194b) may be provided so as to be spaced apart from the inner surface of the body portion (191) at the edge of the slope portion (194a).

[0205] The body part (191) may have a gap through which condensed moisture or foreign substances pass between it and the separation part (194b).

[0206] In Fig. 5, an example is shown in which foreign matter is guided through the inclined portion (194a) of the foreign matter separation member (194) at the bottom of the body portion (191), and flows out of the separation portion (194b) to accumulate at the bottom.

[0207] Due to this, condensed moisture or foreign matter that does not reach the bottom collides with the inclined portion (194a), flows along the inclined surface toward the separation portion (194b), flows through the gap between the separation portion (194b) and the inner surface of the body portion (191), and accumulates on the bottom of the body portion (191).

[0208] By means of the foreign substance separation member (194), foreign substances that are not centrifugally separated from the inner surface of the body part (191) can be separated from the refrigerant gas for a second time.

[0209] The foreign substance separation member (194) may be spaced apart from the inner surface of the body portion (191) and may be coupled to the second flow pipe (193) so as to be supported. To this end, the foreign substance separation member (194) may be provided with a through hole (194c) that may be coupled through the second flow pipe (193). An example in which the through hole (194c) is formed in two spaced apart pieces in the inclined portion (194a) of the foreign substance separation member (194) is illustrated in FIG. 7. In addition, the foreign substance separation member (194) may be formed in a cone shape.

[0210] The separator (190) may be equipped with a foreign matter discharge port (195). The foreign matter discharge port (195) may be installed on the bottom of the body part (191) and may be equipped with a passage that enables the discharge of condensed moisture or foreign matter collected on the bottom of the body part (191). The foreign matter discharge port (195) may be installed on the body part (191) such that the passage inside is in communication with the foreign matter accumulation area on the bottom of the body part (191).

[0211] An opening / closing part (195a) may be installed in the foreign matter discharge port (195). The opening / closing part (195a) opens and closes the flow path of the foreign matter discharge port (195), thereby discharging or blocking condensed moisture or foreign matter accumulated on the bottom of the body part (191).

[0212] The opening / closing unit (195a) may be a valve. The opening / closing unit (195a) may be a simple opening / closing valve, for example, a ball valve. However, the opening / closing unit (195a) is not necessarily limited to a simple opening / closing valve.

[0213] The opening / closing part (195a) closes the flow path of the foreign matter discharge port (195), so that condensed moisture or foreign matter can accumulate on the bottom of the body part (191). The opening / closing part (195a) opens the flow path of the foreign matter discharge port (195), so that condensed moisture or foreign matter collected on the bottom of the body part (191) can be discharged to the outside.

[0214] Fig. 8 is a perspective view showing an example in which a mesh (196) is provided on the inner upper part of a separator (190), and Fig. 9 is a cutaway perspective view showing a flow in which a mesh (196) is provided on the inner upper part of a separator (190) and foreign substances are separated from a refrigerant.

[0215] Referring to FIGS. 8 and 9, a mesh (196) may be installed in the body portion (191). The mesh (196) may be arranged to catch condensed moisture or foreign substances from the refrigerant flowing into the interior of the body portion (191) through the first flow pipe (192).

[0216] For example, the mesh (196) may be arranged between the other side of the first flow pipe (192) and one side of the second flow pipe (193). As a result, some of the refrigerant that passes through the first flow pipe (192) and flows into the body part (191) may have condensed moisture or foreign substances accumulated downward by centrifugal force, and the condensed moisture or foreign substances that are not separated by the centrifugal force may fall downward due to the flow being restricted by the mesh (196). The condensed moisture or foreign substances that fall downward by the mesh (196) may fall onto the foreign substance separating member (194) and flow laterally along the inclined portion (194a), thereby accumulating on the bottom surface of the body part (191).

[0217] In this way, the refrigerant introduced through the other side of the first flow pipe (192) is first separated from foreign substances by centrifugal force, and secondarily separated from foreign substances by the foreign substance separation member (194) and the mesh (196), so that condensed moisture or foreign substances are first and secondly separated from the refrigerant, and thus they can be prevented from being introduced into the compressor without obstructing the flow of the refrigerant, and the performance and reliability of the compressor can be improved.

[0218] The separator (190) may be provided with a support member (197) that supports the body member (191). The support member (197) may support the body member (191) against the ground. The support members (197) may be installed in multiple numbers along the circumferential direction at the lower portion of the outer periphery of the body member (191).

[0219] The scroll compressor (10) according to the present embodiment as described above operates as follows.

[0220] That is, when power is applied to the drive motor (120), rotational force is generated in the rotor (122) and the rotation shaft (125), causing them to rotate, and the rotary scroll (150) eccentrically coupled to the rotation shaft (125) performs a rotational movement with respect to the fixed scroll (140) by the Oldham ring (160).

[0221] Then, the volume of the compression chamber (V) gradually decreases from the suction pressure chamber (Vs) formed on the outside of the compression chamber (V) to the intermediate pressure chamber (Vm) formed continuously toward the center, and then to the discharge pressure chamber (Vd) in the center.

[0222] Then, the refrigerant moves to the condenser (20), expander (30), and evaporator (40) of the refrigeration cycle and then to the separator (190), and this refrigerant moves toward the suction pressure chamber (Vs) forming the compression chamber (V) through the refrigerant suction pipe (115).

[0223] Here, when the refrigerant of the evaporator (40) moves to the compression chamber through the separator (190), the refrigerant flows by receiving centrifugal force inside the body part (191), and is separated from foreign substances and flows into the compression chamber through the second flow pipe (193) and the refrigerant suction pipe (115).

[0224] At this time, condensed moisture or foreign substances that do not reach the bottom can be guided through the foreign substance separation member (194) and accumulated on the lower part of the body part (191). In addition, the refrigerant flowing upward is further separated from foreign substances by the mesh (196), and the refrigerant flows into the interior of the second flow pipe (193) and is introduced into the compression chamber through the refrigerant suction pipe (115).

[0225] In this way, the scroll compressor (10) of the present invention can first separate foreign substances by centrifugal force inside the body (191), and secondarily separate foreign substances by the foreign substance separation member (194) and the mesh (196).

[0226] This prevents condensed moisture or foreign substances from entering the interior of the compressor without obstructing the flow of refrigerant, thereby improving the performance and reliability of the compressor.

[0227] Thereafter, the refrigerant sucked into the suction pressure chamber (Vs) is compressed as it moves along the movement trajectory of the compression chamber (V) to the discharge pressure chamber (Vd) via the intermediate pressure chamber (Vm), and the compressed refrigerant is discharged from the discharge pressure chamber (Vd) to the upper space (110b) of the casing (110) through the discharge port (1412).

[0228] Then, the refrigerant discharged to the upper space (110b) of the casing (110) (the refrigerant is mixed with oil to form a mixed refrigerant. However, during the explanation, the terms mixed refrigerant or refrigerant may be used interchangeably) is moved to the upper space (110b) formed between the main frame (130) and the drive motor (120) through the first discharge passage groove (1421) and the second discharge passage groove (1311). This mixed refrigerant is separated into refrigerant and oil in the upper space (110b), and the refrigerant (or some of the mixed refrigerant from which the oil is not separated) is discharged to the outside of the casing (110) through the refrigerant discharge pipe (116) and moved to the condenser of the refrigeration cycle.

[0229] On the other hand, oil (or mixed oil mixed with liquid refrigerant) separated from the refrigerant in the upper space (110b) moves toward the lower space (110d) through the first oil recovery passage (first discharge passage groove, 1421) formed between the inner surface of the casing (110) and the outer surface of the compression section, and the oil moved to the lower space (110d) is recovered to the lower space (110d) formed at the lower part of the compression section through the second oil recovery passage (second discharge passage groove, 1311) between the inner surface of the casing (110) and the stator (121).

[0230] This oil is supplied to each bearing surface (not shown) through the oil supply passage (126), and some of it is supplied to the compression chamber (V). The oil supplied to the bearing surface and the compression chamber (V) is returned to the lower space (110d) of the casing (110) together with the refrigerant, and a series of processes are repeated.

[0231] The present invention can be used in a scroll compressor that prevents moisture or foreign substances from entering the suction section.

Claims

1. A casing with a sealed internal space; A driving unit having a stator fixed to the internal space and a rotor rotating inside the stator; A rotating shaft rotatably coupled to the above rotor; A compression unit having a rotating scroll installed so as to be rotatable about the rotating shaft and a fixed scroll coupled to be engaged with the rotating scroll to form a compression chamber between the rotating scrolls; and Including a refrigerant suction pipe connected to the casing so as to enable supply of refrigerant to the compression chamber; A scroll compressor including a separator that separates foreign substances from the refrigerant by centrifugal force and collects them at the bottom, and enables the separated refrigerant to be supplied to the compression chamber through the refrigerant suction pipe.

2. In paragraph 1, The above separator, A body part formed in a cylindrical shape so that refrigerant gas containing foreign substances can flow on the inner surface under centrifugal force; A first flow pipe having a path through which gas including foreign substances flows into the interior of the body; and A scroll compressor including a second flow pipe for discharging gas from which foreign substances are separated inside the body portion and providing the gas to the inside of the compressor.

3. In paragraph 2, A scroll compressor in which the first flow pipe has a bending portion formed by bending so as to face the inner surface of the body portion.

4. In paragraph 2, A scroll compressor wherein the second flow pipe comprises at least two bent portions.

5. In paragraph 2, The above second flow pipe, A first pipe section extending in the first direction and into which refrigerant gas separated from foreign substances inside the body section is introduced; A second pipe section connected to the first pipe section and connected to the refrigerant suction pipe so as to be able to supply refrigerant gas from which foreign substances have been separated to the compression chamber; and A scroll compressor including a bending connecting pipe section provided between the first pipe section and the second pipe section and including a bent portion.

6. In paragraph 5, A scroll compressor in which the second pipe section is arranged in the first direction so as to be parallel to the first pipe section.

7. In paragraph 5, A scroll compressor, wherein at least one of the first and second sections is arranged to be greater than half the height of the body section in the first direction.

8. In paragraph 5, A scroll compressor in which the first pipe part is positioned near the center inside the body part, and the second pipe part is positioned at the side inside the body part.

9. In paragraph 1, The above separator includes a foreign matter separation member that guides condensed moisture or foreign matter that has not reached the bottom and deposits it on the lower part of the body. The above foreign substance separation member is, A scroll compressor including an inclined portion installed inside the body portion so as to be inclined toward the inner surface of the body portion.

10. In paragraph 9, The above foreign substance separation member is, A scroll compressor further comprising a separation portion provided on an edge of the above-mentioned inclined portion and spaced apart from the inner surface of the above-mentioned body portion.

11. In paragraph 9, A scroll compressor having a through hole through which the above-mentioned inclined portion is connected to the second flow pipe.

12. In paragraph 1, The above separator is provided with a foreign matter discharge port which is installed at the bottom of the body part and has a discharge path that enables discharge of condensed moisture or foreign matter collected at the bottom of the body part. A scroll compressor having an opening / closing part installed in the foreign matter discharge port to open / close the discharge path of the foreign matter discharge port to enable discharge of condensed moisture or foreign matter collected on the bottom of the body.

13. In paragraph 2, The second flow pipe is at least partially disposed near the bottom of the body portion, A scroll compressor in which a part of the second flow pipe arranged near the floor is provided with a refrigerant inlet hole that allows the introduction of refrigerant layered on the lower part of the body.

14. In paragraph 2, The above separator, A scroll compressor further comprising a mesh arranged between one side of a first flow pipe that provides a path for allowing refrigerant containing foreign substances to flow into the interior of the body portion and one side of a second flow pipe through which refrigerant from which foreign substances have been separated flows, thereby enabling additional separation of foreign substances from the refrigerant.

15. In paragraph 14, A scroll compressor wherein the mesh is arranged so as to penetrate at least one of the first flow pipe and the second flow pipe.

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