EP3096018B1 - Rotationsverdichter und verfahren zur herstellung eines rotationsverdichters - Google Patents

Rotationsverdichter und verfahren zur herstellung eines rotationsverdichters Download PDF

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Publication number
EP3096018B1
EP3096018B1 EP16168068.1A EP16168068A EP3096018B1 EP 3096018 B1 EP3096018 B1 EP 3096018B1 EP 16168068 A EP16168068 A EP 16168068A EP 3096018 B1 EP3096018 B1 EP 3096018B1
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EP
European Patent Office
Prior art keywords
case
compression mechanism
extension
stator
rotary compressor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16168068.1A
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English (en)
French (fr)
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EP3096018A1 (de
Inventor
Changjun Noh
Yeongcheol KO
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LG Electronics Inc
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LG Electronics Inc
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/10—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member
    • F04C18/113—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member the inner member carrying rollers intermeshing with the outer member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/0085—Prime movers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/20—Manufacture essentially without removing material
    • F04C2230/23—Manufacture essentially without removing material by permanently joining parts together
    • F04C2230/231—Manufacture essentially without removing material by permanently joining parts together by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings

Definitions

  • a rotary compressor and a method for manufacturing a rotary compressor are disclosed herein.
  • compressors are machines that receive power from a power generation device, such as an electric motor or a turbine, to compress air, a refrigerant, or various working gases, thereby to increase a pressure thereof.
  • a power generation device such as an electric motor or a turbine
  • Compressors are being widely used in home appliances, such as refrigerators or air conditioners, or in various industrial fields.
  • Compressors may be largely classified into reciprocating compressors, in which a compression space, into/from which a working gas, such as a refrigerant, is suctioned and discharged, is defined between a piston and a cylinder to allow the piston to be linearly reciprocated into the cylinder, thereby compressing the refrigerant, rotary compressors, in which a compression space, into/from which a working gas, such as a refrigerant, is suctioned and discharged, is defined between a roller that eccentrically rotates and a cylinder to allow the roller to eccentrically rotate along an inner wall of the cylinder, thereby compressing the refrigerant, and scroll compressors, in which a compression space, into/from which a working gas, such as a refrigerant, is suctioned and discharged, is defined between an orbiting scroll and a fixed scroll to compress the refrigerant while the orbiting scroll rotates along the fixed scroll.
  • reciprocating compressors in which a compression space, into/from which
  • JP S63 208688 A discloses a rotary compressor comprising a blade arranged in a guide groove of a cylinder.
  • US 5 980 222 A discloses a hermetic compressor comprising a hermetically sealed housing having an oil sump therein.
  • JP H08 61273 A discloses a rotary compressor comprising a motor-driven element part arranged on one inner side of a closed case.
  • JP 2009 115018 A discloses a rotary compressor formed by accommodating in a sealed vessel an electric element and a rotary compression element.
  • Figs. 1 to 3 are views of a rotary compressor according to a related art.
  • a rotary compressor 1 according to the related art includes a case 2a that defines an inner space, a lower cover 2b coupled to a lower portion of the case 2a, and an upper cover 2c coupled to an upper portion of the case 2a.
  • the case 2a may extend upward lengthwise from the lower cover 2b to the upper cover 2c and have a cylindrical shape.
  • the case 2a, the lower cover 2b, and the upper cover 2c are assembled with each other to define a sealed space in the compressor 1.
  • the lower cover 2b and the upper cover 2c may be coupled by being welded along an inner circumferential surface of the case 2a.
  • a stator 3 that generates magnetic force by applied power and a compression mechanism 4 that compresses a refrigerant by induced electromotive force which is generated through an interaction with the stator 3 are provided in the case 1a.
  • the compression mechanism 4 includes a rotor 5 rotatably provided in the stator 3.
  • the stator 3 and the rotor 5 may be components of a compression motor.
  • the compression mechanism 4 further includes a rotational shaft 6 coupled to the rotor 5 to rotate according to rotation of the rotor 5.
  • the compression mechanism 4 further includes a roller 7 eccentrically coupled to a lower portion of the rotational shaft 6 to rotate along a predetermined eccentric trajectory according to the rotation of the rotational shaft 6, a cylinder 8 in which the roller 7 is accommodated, and a main bearing 9 and a sub bearing 10, which are provided on upper and lower portions of the cylinder 8 to support the cylinder 8.
  • Each of the main bearing 9 and the sub bearing 10 has an approximately disc shape.
  • the main bearing 9 and the sub bearing 10 may support the upper and lower portions of the cylinder 8, respectively.
  • the compressor 1 may further include a suction part or portion 11a that guides suction of the refrigerant into the cylinder 6 and a discharge part or portion 11b that discharges the refrigerant compressed in the compressor 1.
  • the discharge portion 11b may be coupled to the upper cover 2c.
  • the compressor 1 further includes a suction pipe 12 coupled to one side of the suction portion 11a of the cylinder 8.
  • the suction pipe 12 may be understood as a pipe that guides the refrigerant discharged from a gas/liquid separator (not shown) into the compressor 1.
  • the suction pipe 12 may be press-fitted into the case 2a to communicate with the suction portion 11a.
  • the roller 7 When the rotational shaft 6 rotates, the roller 7 may rotate and revolve along an inner circumferential surface of the cylinder 8 while drawing a predetermined eccentric trajectory.
  • the refrigerant may be introduced into a suction chamber of the cylinder 8 through the suction portion 11a. Then, the refrigerant may be compressed in a compression chamber while the roller 7 rotates. The compressed refrigerant may be discharged outside of the compressor 1 through the discharge portion 11b.
  • the case 2a may be heated, and the stator 3 may be press-fitted into the case 2a.
  • the compression mechanism 4 may be inserted into the case 2a and then coupled to the case 2a through welding. After the stator 3 and the compression mechanism 4 are assembled within the case 2a, the suction pipe 12 may be coupled to the one side of the suction portion 11a, and the lower cover 2b and the upper cover 2c may be welded to the case 2a.
  • the compression mechanism 4 which is disposed adjacent to the lower cover 2b may be thermally deformed. Also, when the suction pipe 12 is press-fitted to the one side of the suction portion 11a of the cylinder 8, a predetermined press-fit force may be applied to the compression mechanism 4. As a result, misalignment between the stator 3 and the rotor 5 may occur by the thermal deformation or the press-fit force of the compression mechanism 4.
  • a predetermined gap, that is, an air gap, defined between the stator 3 and the rotor 5 may be non-uniform (increase or decrease) to increase noise due to the motor (stator 3 and rotor 5). That is, as illustrated in Fig. 3 , a non-uniform air gap g1 may be defined between an inner circumferential surface l1 of the stator 3 and an outer circumferential surface l2 of the rotor 5, causing noise.
  • an outer diameter of the stator 3 has to be the same as an inner diameter of the compression mechanism 4.
  • the compression mechanism 4 may be restricted in design.
  • Fig. 4 is a cross-sectional view of a rotary compressor according to an embodiment.
  • Fig. 5 is an enlarged view illustrating a portion A of Fig. 4 .
  • a rotary compressor 100 (hereinafter, referred to as a "compressor") according to an embodiment may include a case 101 and 102, in which components of the compressor 100 may be provided, and an upper cover 104 coupled to an upper portion of the case 101 and 102 to define an upper outer appearance of the rotary compressor 100.
  • An outer appearance of the compressor 100 may be defined by the case 101 and 102 and the upper cover 104, and a sealed space may be defined in the compressor 100.
  • the case 101 and 102 may include a first case 101, and a second case 102 coupled to a lower portion of the first case 101.
  • Each of the first and second cases 101 and 102 may have a cylindrical shape.
  • the first case 101 may be referred to as an "upper case”
  • the second case 102 may be referred to as a "lower case”.
  • the upper cover 104 may be coupled to an upper portion of the first case 101.
  • the compressor 100 may include a stator 110 provided in the first case 101.
  • a coil 110a, to which current may be applied, may be provided in the stator 110, and thus, a magnetic force may be generated by the applied current.
  • the compressor 100 may further include a compression mechanism 111 configured to compress a refrigerant using an induced electromotive force generated through an interaction with the stator 110.
  • the compression mechanism 111 may be provided in the second case 102. While the first and second cases 101 and 102 are assembled with each other, at least a portion of the compression mechanism 111 may be provided in the first case 101.
  • the compression mechanism 111 may include a rotor 112, which may be rotatably provided in the stator 110.
  • the stator 110 and the rotor 112 may be components of a compression motor.
  • the compression mechanism 111 may further include a rotational shaft 114 coupled to the rotor 112 to rotate according to rotation of the rotor 112.
  • the compression mechanism 111 may further include a roller 115 eccentrically coupled to a lower portion of the rotational shaft 114 to rotate along a predetermined eccentric trajectory according to rotation of the rotational shaft 114, a cylinder 116, in which the roller 115 may be accommodated, and a main bearing 117 and a sub bearing 118, which may be provided on upper and lower portions of the cylinder 116 to support the cylinder 116.
  • the cylinder 116 may be provided in the second case 102.
  • Each of the main bearing 117 and the sub bearing 118 may have an approximately disc shape.
  • the main bearing 117 and the sub bearing 118 may support the upper and lower portions of the cylinder 116, respectively.
  • the main bearing 117 may be provided on the upper portion of the cylinder 116 to disperse a compression force of the refrigerant, which may be generated in the cylinder 116, or a force generated in the compression motor (stator 110 and rotor 112) toward the first and second cases 101 and 102.
  • the compressor 100 may further include a suction part or portion 116a that guides suction of the refrigerant into the cylinder 116 and a discharge part or portion 104b that discharges the refrigerant compressed in the compressor mechanism 111.
  • the discharge portion 104a may be provided in the upper cover 104.
  • the compressor 100 may further include a suction pipe 119 coupled to one side of the suction portion 116a of the cylinder 116.
  • the suction pipe 119 may be a pipe that guides the refrigerant discharged from a gas/liquid separator (not shown) into the compressor 100.
  • the suction pipe 119 may be press-fitted into the second case 102 to communicate with the suction portion 116a.
  • a lower cover 103 that defines an outer appearance of the lower portion of the compressor 100 may be provided on a lower portion of the second case 102.
  • the lower cover 103 may define a bottom surface of the case 101 and 102.
  • the lower cover 103 may be integrated with the second case 102.
  • the second case 102 may include a step 121b, on which a lower portion of the first case 101 may be provided.
  • the second case 102 may include a first extension 121a that extends upward from the lower cover 103, the step 121b bent from the first extension 121a, and a second extension 121c that extends upward from the step 121b.
  • the step 121b may extend outward from an upper end of the first extension 121a, that is, in a direction in which an inner diameter of the second case 102 increases.
  • An outer circumferential surface of the second case 102 may have a bent shape due to the step 121b.
  • the first case 101 may be placed on the step 121b.
  • a lower end 101a of the first case 101 may be spaced apart from the step 121b. That is, a top surface of the step 121b and the lower end 101a of the first case 101 may be spaced a predetermined distance d1 from each other.
  • a degree of freedom in assembly of the first and second cases 101 and 102 may be improved, and an air gap between the stator 110 and the rotor 112 may be easily adjusted. If the lower end 101a of the first case 101 is seated or contacts the step 121b, even though the stator 110 and the rotor 112 are twisted in position while the first and second cases 101 and 102 are assembled with each other, causing a non-uniform air gap, the first and second cases 101 and 102 may interfere with each other, restricting adjustment of the air gap.
  • a first welding 125 to couple the first and second cases 101 and 102 to each other may be provided between an outer circumferential surface of the first case 101 and an inner circumferential surface of the second case 102.
  • the first welding 125 may be provided between the lower portion of the first case 101 and the second extension 121c of the second case 102.
  • a predetermined gap may be defined between the lower portion of the first case 101 and the second extension 121c.
  • a welding agent may be supplied through the gap to perform a welding process, for example.
  • the inner diameter of the second case 102 may be less than an inner diameter of the first case 101.
  • the stator 110 may have an outer diameter greater than an outer diameter of the cylinder 116.
  • the inner circumferential surface of the first case 101 and the inner circumferential surface of the second case 102 may define surfaces different from each other.
  • the step 121b may increase in extension length to realize a stable coupling of the first and second cases 101 and 102.
  • Figs. 6 to 9 are views illustrating a process of manufacturing a rotary compressor according to an embodiment.
  • stator 110 may be installed in first case 101 having opened upper and lower sides.
  • the stator 110 may be installed by performing a "thermal shrink-fit" process on the first case 101.
  • the first case 101 may be heated to be deformed, and then, the stator 110 may be inserted into an inner space of the first case 101.
  • stator 110 has an outer diameter which is slightly greater than the inner diameter of the first case 101, while the stator 110 is inserted, the first case 101 may be deformed so that the inner diameter of the first case 101 is expanded. Also, when the first case 101 is cooled, the stator 110 may be press-fitted into an inner surface of the first case 101 while the first case 101 is shrunk.
  • compression mechanism 111 may be installed on second case 102.
  • the compression mechanism 111 may be an assembly of rotor 112, rotational shaft 114, cylinder 116, and upper and lower bearings 117 and 118.
  • a hook protrusion 128 may be formed on an inner circumferential surface of the second case 102.
  • the hook protrusion 128 may protrude inward from an inner circumferential surface of first extension 121a of the second case 102.
  • At least a portion of the compression mechanism 111 may be hooked with the hook protrusion 128.
  • a lower portion of the cylinder 116 may be hooked with the hook protrusion 128.
  • the compression mechanism 111 may be stably installed inside of the second case 102 by the hook protrusion 128.
  • a pipe coupling part or portion 131, to which suction pipe 119 may be coupled, may be formed in the second case 102. At least a portion of the second case 102 may be penetrated to form the pipe coupling portion 131.
  • a connection pipe (not shown) may be connected to the pipe coupling portion 131, and the pipe coupling portion 131 may be coupled to the connection pipe.
  • a second welding 133 to fix the compression mechanism 111 to the second case 102 may be formed in the second case 102. At least a portion of the first extension 121a of the second case 102 may be penetrated to form the second welding 133. A plurality of the second welding 133 may be provided along a circumference of the first extension 121a, and the plurality of second weldings 133 may be spaced apart from each other.
  • the compression mechanism 111 may be assembled with the second case 102, and then, the suction pipe 119 may be coupled to the pipe coupling portion 131. In this state, an object to be welded may be supplied through the second welding 133 and then welded. When the welding is completed, as illustrated in Fig. 8 , the second case 102, the compression mechanism 111, and the suction pipe 119 may be fixed.
  • the first case 101 may be moved downward from an upper side of the second case 102 to assemble the first and second cases 101 and 102 with each other. While the first and second cases 101 and 102 are assembled with each other, the rotor 112 may be inserted into the stator 110. The first case 101 may be moved downward until the lower portion of the first case 101 is disposed inside of the second extension 121c of the second case 102. The lower end 101a of the first case 101 may be disposed at a position which is adjacent to the step 121b of the second case 102, that is, a position spaced upward from the step 121b.
  • the air gap between the stator 110 and the rotor 112 may be adjustable.
  • the first case 101 may be changed in position or centered so that the air gap is uniform.
  • a degree of freedom in assembly of the first and second cases 101 and 102 may be secured.
  • the first case 101 may be adjustable in position.
  • the first welding 125 may be performed.
  • the first and second cases 101 and 102 may be firmly coupled to each other by the welding.
  • the upper cover 104 may be coupled to the upper portion of the first case 101.
  • the lower portion of the upper cover 104 may be inserted into the opened upper portion of the first case 101, and a welding welded to the inner circumferential surface of the first case 101 may be disposed along an outer circumferential surface of the upper cover 104.
  • Fig. 10 is a flowchart illustrating a method for manufacturing a rotary compressor according to an embodiment. A method for manufacturing a rotary compressor according to an embodiment will be described with reference to Fig. 10 .
  • a stator such as stator 110 of Fig. 4
  • the stator may be installed in a first case, such as first case 101 of Fig. 4 , according to an embodiment.
  • the stator may be press-fitted into the first case through a thermal shrink-fit process (S11).
  • a compression mechanism such as compression mechanism 111 of Fig. 4
  • the compression mechanism may be inserted into the second case until at least a portion of the compression mechanism is supported by a hook protrusion, such as hook protrusion 128 of Fig. 7 .
  • at least a portion of the compression mechanism may include a lower end of a cylinder, such as cylinder 116 of Fig. 4 (S12).
  • a suction pipe such as suction pipe 119 of Fig. 4
  • a pipe coupling part or portion such as pipe coupling portion 131 of Fig. 7
  • the suction pipe may be press-fitted into the pipe coupling portion (S13).
  • a welding agent may be supplied through a welding, such as second welding 133 of Fig. 7 , to perform welding of the compression mechanism and the second case.
  • the compression mechanism may be stably fixed to the second case through the welding (S14).
  • the first case may be placed on the second case.
  • the second case may move downward until a lower end of the first case is disposed on at upper portion, which is adjacent to a step, such as step 121b of Fig. 7 of the second case.
  • a lower portion of the second case may be disposed inside of a second extension, such as second extension 121c of Fig. 5 , of the second case 102.
  • the lower end of the first case may be spaced upward from the step of the second case.
  • an air gap between the stator and a rotor, such as rotor 112 of Fig. 4 may be uniformly adjusted.
  • a degree of freedom in assembly of the first and second cases may be secured (S15).
  • the welding of the first and second cases may be performed through a welding, such as first welding 125 of Fig. 5 .
  • the second case may be stably fixed to the first case through the welding (S16).
  • an upper cover such as upper cover 104 of Fig. 4
  • the upper cover and the first case may be, for example, welded and coupled along an outer circumferential surface of the upper cover (S17).
  • the first case and the second case may be coupled to each other.
  • Fig. 11 is a cross-sectional view of a rotary compressor according to another embodiment.
  • a compressor 100a may include a first case 201, in which stator 110 may be provided, and a second case 202 coupled to a lower portion of the first case 210 to accommodate cylinder 116.
  • the second case 202 may include a first extension 221a that extends upward from lower cover 103, a step 221b bent from the first extension 221a, and a second extension 221c that extends upward from the step 221b.
  • the step 221b may extend outward from an upper end of the first extension 221a, that is, in a direction in which an inner diameter of the second case 202 increases.
  • An outer circumferential surface of the second case 202 may have a bent shape due to the step 221b.
  • Lower end 201a of the first case 201 may be spaced a predetermined distance d2 from a top surface of the step 221b.
  • a degree of freedom in assembly of the first and second cases 201 and 202 may be improved due to the above-described arrangement, and description will be derived from that of the previous embodiment.
  • a welding 225 may be provided between an outer circumferential surface of the first case 201 and the second extension 221c.
  • An inner diameter of the second case 202 that is, an inner diameter of the first extension 221a may be equal to an inner diameter of the first case 201.
  • the stator 110 may have a same diameter as the cylinder 116.
  • the step 221b may have a relatively short extension length when compared to an extension length of the step 121b according to the previous embodiment.
  • the first and second cases 201 and 202 may be stably coupled to each other.
  • Fig. 12 is a cross-sectional view of a rotary compressor according to still another embodiment.
  • a compressor 100b may include a first case 301, in which stator 110 may be provided, and a second case 302 coupled to a lower portion of the first case 301 to accommodate cylinder 116.
  • the second case 302 may include a first extension 321a that extends upward from lower cover 103, a step 321b bent from the first extension 321a, and a second extension 321c that extends upward from the step 321b.
  • the step 321b may extend inward from an upper end of the first extension 321a, that is, in a direction in which an inner diameter of the second case 302 decreases.
  • An outer circumferential surface of the second case 302 may have a bent shape due to the step 321b.
  • Lower end 301a of the first case 301 may be spaced a predetermined distance d3 from a top surface of the step 321b.
  • a degree of freedom in assembly of the first and second cases 301 and 302 may be improved due to the above-described arrangement, and description will be derived from that of the previous embodiment.
  • a welding 325 may be provided between an outer circumferential surface of the first case 301 and the second extension 321c.
  • An inner diameter of the second case 302, that is, an inner diameter of the first extension 321a may be greater than an inner diameter of the first case 301.
  • the stator 110 may have an outer diameter less than an outer diameter of the cylinder 116. That is, when the compressor is designed so that the motor (stator 110 and rotor 112) has a width less than a width of the compression mechanism 111, the upper portion of the second case 302 may be bent inward, and thus, the first and second cases 301 and 302 may be stably coupled to each other.
  • the compressor may be prevented from being thermally deformed by welding the lower cover to the case.
  • the first case in which the stator may be provided may be assembled with the second case.
  • the air gap between the stator and the rotor may be uniformly adjusted.
  • the air gap is adjustable after the suction pipe is press-fitted into the second case, the non-uniform air gap between the stator and the rotor due to the press-fitting of the suction pipe may be prevented.
  • two separated cases may be assembled with each other to form the case of the compressor.
  • the degree of freedom in design of the assembly of the case may be secured.
  • the air gap between the stator and the rotor may be easily adjusted to be uniform. Therefore, as the air gap is uniform, occurrence of noise due to the non-uniform air gap may be prevented.
  • Embodiments disclosed herein provide a rotary compressor and a method of manufacturing a rotary compressor, which are simple, and a degree of freedom in design of which is capable of being secured.
  • Embodiments disclosed herein provide a rotary compressor that may include a first case, in which a stator may be installed; and a second case installed at one side of the first case and to which a compression mechanism may be coupled.
  • the second case may include a first extension part or extension, to which the compression mechanism may be welded; a stepped part or step that extends to be stepped from the first extension part; and a second extension part or extension that extends from the stepped part.
  • the second extension part may be welded to the first case.
  • the stepped part and an end of the first case may be disposed or provided to be spaced apart from each other.
  • the second case may be coupled to a lower portion of the first case, and a top surface of the stepped part and a lower end of the first case may be disposed or provided to be spaced apart from each other.
  • the rotary compressor may further include a lower cover integrated with the second case to define an outer appearance of a lower portion of the second case.
  • the stepped part may extend from the first extension part in a direction in which the second case increases in inner diameter.
  • the compression mechanism may include a cylinder, in which a roller may be accommodated, and the cylinder may have an outer diameter less than that of the stator.
  • the compression mechanism may include a cylinder, in which a roller may be accommodated, and the cylinder may have a same outer diameter as the stator.
  • the stepped part may extend from the first extension part in a direction in which the second case decreases in inner diameter.
  • the compression mechanism may include a cylinder in which a roller may be accommodated, and the cylinder may have an outer diameter greater than that of the stator.
  • the rotary compressor may further include a first welding part or welding disposed or provided between an outer circumferential surface of the first case and an inner circumferential surface of the second extension part.
  • the rotary compressor may further include a second welding part or welding disposed or provided on the first extension part and coupled to the compression mechanism.
  • the rotary compressor may further include a hook protrusion that protrudes inward from the first extension part to support the compression mechanism.
  • the rotary compressor may further include an upper cover coupled to the first case to define an outer appearance of an upper portion of the first case.
  • Embodiments disclosed herein further provide a method for manufacturing a rotary compressor that may include installing a stator in a first case; installing a compression mechanism including a rotor in a second case; coupling a suction pipe to the second case; welding the compression mechanism to the second case; assembling the first case with the second case to adjust an air gap between the stator and the rotor; and welding the first and second cases to each other.
  • the second case may include a stepped part or step that is bent to extend, and in the assembling of the first and second cases may include locating an end of the first case at a position which is spaced apart from the stepped part.
  • the installing of the compression mechanism in the second case may include supporting the compression mechanism on a hook protrusion of the second case.
  • a lower cover defining an outer appearance of a lower portion of the second case may be integrated with the second case.
  • the method may further include coupling an upper cover to the first case.
  • any reference in this specification to "one embodiment,” “an embodiment,” “example embodiment,” etc. means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment.
  • the appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)

Claims (10)

  1. Rotationsverdichter, aufweisend:
    ein erstes Gehäuse (101, 201, 301), in welchem ein Stator (110) bereitgestellt ist; und
    ein an einer Seite des ersten Gehäuses (101, 201, 301) bereitgestelltes zweites Gehäuse (102, 202, 302), mit welchem ein Verdichtungsmechanismus (111) gekoppelt ist, wobei eine untere Abdeckung (103) mit dem zweiten Gehäuse (102, 202, 302) integriert ist, um ein äußeres Aussehen eines unteren Abschnitts des zweiten Gehäuses (102, 202, 302) zu definieren,
    dadurch gekennzeichnet, dass das zweite Gehäuse (102, 202, 302) aufweist:
    eine erste Verlängerung (121a, 221a, 321a), mit welcher der Verdichtungsmechanismus (111) gekoppelt ist und welche sich von der unteren Abdeckung (103) aus aufwärts erstreckt;
    eine Stufe (121b, 221b, 321b), die sich stufig von der ersten Verlängerung (121a, 221a, 321a) aus erstreckt; und
    eine zweite Verlängerung (121c, 221c, 321c), die sich von der Stufe (121b, 221b, 321b) aus aufwärts erstreckt und mit dem ersten Gehäuse (101, 201, 301) gekoppelt ist,
    wobei
    das zweite Gehäuse (102, 202, 302) mit einer unteren Seite des ersten Gehäuses (101, 201, 301) gekoppelt ist und eine obere Oberfläche der Stufe (121b, 221b, 321b) und ein unteres Ende (101a, 201a, 301a) des ersten Gehäuses (101, 201, 301) voneinander beabstandet sind, und
    die erste Verlängerung (121a, 221a, 321a) an den Verdichtungsmechanismus (111) angeschweißt ist und die zweite Verlängerung (121c, 221c, 321c) an das erste Gehäuse (101, 201, 301) angeschweißt ist.
  2. Rotationsverdichter nach Anspruch 1, wobei die Stufe (121b, 221b) sich von der ersten Verlängerung (121a, 221a) in eine Richtung erstreckt, in welcher ein Innendurchmesser des zweiten Gehäuses (102, 202) zunimmt, und
    wobei der Verdichtungsmechanismus (111) einen Zylinder (116) aufweist, in welchem eine Walze (115) untergebracht ist, und
    wobei der Zylinder (116) einen Außendurchmesser hat, der kleiner als ein Außendurchmesser des Stators (110) ist, oder einen gleichen Außendurchmesser wie der Stator (110) hat.
  3. Rotationsverdichter nach Anspruch 1, wobei die Stufe (321b) sich von der ersten Verlängerung (321a) in eine Richtung erstreckt, in welcher ein Innendurchmesser des zweiten Gehäuses (302) abnimmt.
  4. Rotationsverdichter nach Anspruch 3, wobei der Verdichtungsmechanismus (111) einen Zylinder (116) aufweist, in welchem eine Walze (115) untergebracht ist, und wobei der Zylinder (116) einen Außendurchmesser hat, der größer als ein Außendurchmesser des Stators (110) ist.
  5. Rotationsverdichter nach einem der Ansprüche 1 bis 4, ferner mit einer ersten Schweißnaht (125, 225), die zwischen einer Außenumfangsfläche des ersten Gehäuses (101, 201) und einer Innenumfangsfläche der zweiten Verlängerung (121c, 221c) bereitgestellt ist.
  6. Rotationsverdichter nach Anspruch 5, ferner mit einer zweiten Schweißnaht (133), die an der ersten Verlängerung (121a) bereitgestellt ist und mit dem Verdichtungsmechanismus (111) gekoppelt ist.
  7. Rotationsverdichter nach einem der Ansprüche 1 bis 6, ferner mit einem Hakenvorsprung (128), der von der ersten Verlängerung (121a, 221a, 321a) einwärts vorspringt, um den Verdichtungsmechanismus (111) zu stützen.
  8. Rotationsverdichter nach einem der Ansprüche 1 bis 7, ferner mit einer oberen Abdeckung (104), die mit dem ersten Gehäuse (101, 201, 301) gekoppelt ist, um ein äußeres Aussehen eines oberen Abschnitts des ersten Gehäuses (101, 201, 301) zu definieren.
  9. Verfahren zur Herstellung eines Rotationsverdichters, wobei das Verfahren aufweist:
    Einbauen eines Stators (110) in ein erstes Gehäuse (101, 201, 301);
    Einbauen eines Verdichtungsmechanismus (111), der einen Rotor (112) aufweist, in ein zweites Gehäuse (102, 202, 302);
    Koppeln eines Saugrohrs (119) an das zweite Gehäuse (102, 202, 302);
    Verbinden des Verdichtungsmechanismus (111) mit dem zweiten Gehäuse (102, 202, 302);
    Zusammenbauen des ersten Gehäuses (101, 201, 301) mit dem zweiten Gehäuse (102, 202, 302), um einen Luftspalt zwischen dem Stator (110) und dem Rotor (112) einzustellen; und
    Verbinden des ersten und zweiten Gehäuses miteinander,
    dadurch gekennzeichnet, dass
    das zweite Gehäuse (102, 202, 302) eine Stufe (121b, 221b, 321b) aufweist, die gebogen ist, um sich radial zu erstrecken, und das Zusammenbauen des ersten und zweiten Gehäuses aufweist: Anordnen eines unteren Endes des ersten Gehäuses (101, 201, 301) an einer Position, die in einem Abstand oberhalb der Stufe (121b, 221b, 321b) ist, und
    das Verbinden des Verdichtungsmechanismus (111) mit dem zweiten Gehäuse (102, 202, 302) aufweist: Schweißen des Verdichtungsmechanismus (111) an das zweite Gehäuse (102, 202, 302), und das Verbinden des ersten und zweiten Gehäuses (101, 102; 201, 202; 301, 302) miteinander aufweist: Schweißen des ersten und zweiten Gehäuses aneinander.
  10. Verfahren nach Anspruch 9, wobei das Einbauen des Verdichtungsmechanismus (111) in das zweite Gehäuse (102, 202, 302) aufweist: Stützen des Verdichtungsmechanismus (111) auf einem Hakenvorsprung (128) des zweiten Gehäuses (102, 202, 302).
EP16168068.1A 2015-05-22 2016-05-03 Rotationsverdichter und verfahren zur herstellung eines rotationsverdichters Active EP3096018B1 (de)

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KR1020150071981A KR101727801B1 (ko) 2015-05-22 2015-05-22 로터리 압축기 및 그 제조방법

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Also Published As

Publication number Publication date
EP3096018A1 (de) 2016-11-23
KR20160137198A (ko) 2016-11-30
US20160341199A1 (en) 2016-11-24
KR101727801B1 (ko) 2017-04-17
CN106168213A (zh) 2016-11-30

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