Compressor

Abstract

The present invention provides a compressor. The compressor of the present invention includes: a housing; a compression unit having a cylinder defining a compression space for refrigerant, a piston disposed reciprocally inside the cylinder, and a driving unit for reciprocating the piston axially; and a support unit for elastically supporting the compression unit so as to be spaced apart from the inner surface of the housing. The support unit has a wire spring, the wire spring having a plurality of straight portions arranged parallel to each other and curved portions connecting two adjacent straight portions, the wire spring having a first wire spring and a second wire spring arranged symmetrically with each other, one end of each of the first wire spring and the second wire spring being respectively connected to the compression unit, the wire spring having a connecting portion connecting the other ends of the first wire spring and the second wire spring, and the connecting portion being supported by the housing. Thereby, the structure can be made simple and the manufacturing cost can be reduced.

Description

Technical Field

[0001] The present invention relates to a compressor. Background Art

[0002] As is well known, a compressor is a device that transfers power from a power generating device such as a motor or a turbine and compresses a working fluid such as air or a refrigerant (refrigerant gas). Specifically, compressors are widely used in the entire industrial field or household appliances, especially in a vapor compression refrigeration cycle (hereinafter referred to as "refrigeration cycle") and the like.

[0003] Such compressors can be classified into a reciprocating compressor, a rotary compressor, and a scroll compressor according to the method of compressing the refrigerant.

[0004] Such compressors generally include a housing or a casing (hereinafter referred to as "casing") that forms a sealed space, and a compression unit disposed inside the casing and compressing the refrigerant.

[0005] The compression unit includes: a cylinder that forms a compression space for the refrigerant inside; a piston, one end of which is disposed inside the cylinder; and a driving unit that drives the piston to reciprocate axially with respect to the cylinder.

[0006] The driving unit is composed of a stator and a rotor that reciprocates axially with respect to the stator.

[0007] The compression unit is separated from the inner surface of the casing and supported by an elastic support portion, so that vibration generated during driving can be suppressed from being transmitted to the casing.

[0008] In addition, in such a conventional compressor, since the piston and the rotor are driven axially, it is required to reduce the radial displacement, that is, the lateral displacement, of the compression unit.

[0009] Regarding such a conventional compressor, it is known that a compressor having a leaf spring is disclosed in Korean Patent No. 10-1990136 (June 11, 2019) applied by the present applicant, and the lateral displacement can be reduced by increasing the radial rigidity of the leaf spring.

[0010] However, in a compressor having such a leaf spring, since the leaf spring is composed of a plate-shaped main body and a plurality of elastic deformation portions extending spirally toward the center from the main body, there are problems such as a complex structure and a need for relatively high manufacturing costs and efforts. For reference, the manufacturing cost of such a leaf spring is approximately 10 - 20 times higher than that of a support system having a conventional compression coil spring.

[0011] Moreover, the leaf spring that supports the rear end of the compression unit has a suction pipe for sucking refrigerant disposed at the center. Therefore, a plurality of spiral elastic support portions are formed on the periphery of the suction pipe, and there is a problem that the radial size of the leaf spring increases accordingly.

[0012] In addition, a suction pipe extends axially and is joined to the rear end of the housing. Since a plurality of elastic deformation portions of the leaf spring are joined to the periphery of the suction pipe, a relatively large installation space is required, and accordingly, there is a problem that the axial length of the compressor increases.

[0013] Furthermore, since the front elastic support portion that axially supports the front end of the compression unit is supported by the cylindrical portion of the housing, and the rear elastic support portion that supports the rear end of the compression unit is supported by the suction pipe connected to the center of the rear end of the housing, when the piston reciprocates (vibrates) axially during the driving of the compression unit, a rotational torque that causes the housing to rotate will be generated, and thus continuous vibration and impact will be applied to the legs that support the compression unit (especially the rear legs) in the vertical direction. Such vibration will be transmitted to the support object on which the compressor is installed, such as the bottom surface of the refrigerator machinery room, thereby causing vibration noise.

[0014] Prior Art Documents

[0015] Patent Documents

[0016] (Patent Document 1) KR 10 - 1990136 B1 Summary of the Invention

[0017] Therefore, an object of the present invention is to provide a compressor having an elastic support portion with a simple structure and capable of reducing manufacturing costs.

[0018] Another object of the present invention is to provide a compressor that minimizes the rotational torque transmitted to the housing during the driving of the piston, thereby being able to suppress the occurrence of vibration of the housing.

[0019] Still another object of the present invention is to provide a compressor that can shorten the axial length of the compressor.

[0020] In order to solve the problems described above, the technical feature of the compressor of the present invention lies in that it is constituted by a wire spring, and the wire spring has a plurality of straight portions and curved portions connecting the two straight portions.

[0021] Specifically, the compressor has a housing, a compression unit disposed inside the housing and compressing refrigerant, and an elastic support portion that elastically supports the compression unit so as to be separated from the inner surface of the housing. The elastic support portion is constituted by a wire spring, and the wire spring has a plurality of straight portions arranged in parallel with each other and curved portions connecting two adjacent straight portions.

[0022] Thereby, the structure is simple and easy to manufacture, and the manufacturing cost can be reduced.

[0023] The wire spring is symmetrically arranged with respect to the center line passing through the center of the housing.

[0024] The wire spring has a first wire spring and a second wire spring that are symmetrically arranged with respect to the center line.

[0025] One end portion of each of the first wire spring and the second wire spring is respectively connected to the compression unit, and the other end portions of the first wire spring and the second wire spring are connected to each other by a connecting portion.

[0026] The connecting portion connecting the first wire spring and the second wire spring is supported by the housing.

[0027] A vibration insulation member for vibration insulation is provided between the wire spring and the housing.

[0028] Thereby, the vibration generated in the compression unit can be suppressed from being transmitted to the housing.

[0029] The compressor according to an embodiment of the present invention includes: a housing; a compression unit having a cylinder forming a compression space for refrigerant, a piston reciprocally disposed inside the cylinder, and a driving unit for reciprocating the piston in the axial direction; and a support unit provided at a front end portion or a rear end portion of the compression unit to elastically support the compression unit so as to be separated from the inner surface of the housing. The support unit has a wire spring, the wire spring has a plurality of straight portions arranged in parallel with each other and curved portions connecting two adjacent straight portions, the wire spring has a first wire spring and a second wire spring that are symmetrically arranged with respect to the center line passing through the center of the housing, one end portion of each of the first wire spring and the second wire spring is respectively connected to the compression unit, the wire spring has a connecting portion connecting the other end portions of the first wire spring and the second wire spring, and the connecting portion is supported by the housing.

[0030] Thereby, the structure of the support unit is simple and easy to manufacture, and the manufacturing cost can be reduced.

[0031] The housing is formed in a cylindrical shape. The housing has a length that is relatively long compared to the diameter. The housing is constituted, for example, by a housing body having a cylindrical shape and covers that block both end portions of the housing body.

[0032] The housing is arranged such that its length is along the horizontal direction. Thus, in a refrigerator having the compressor of this embodiment, without increasing the size of the refrigerator cabinet, the height of the machine room in which the compressor is installed can be significantly reduced, and thus the food storage space for storing food can be significantly increased.

[0033] A plurality of legs are provided at the bottom of the housing. A vibration insulation member (e.g., anti-vibration rubber) is provided on the plurality of legs. Thus, the vibration of the housing can be suppressed from being transmitted to the support object (e.g., the bottom surface of the machine room).

[0034] The compression unit is constituted, for example, by a cylinder, a piston that reciprocates inside the cylinder, and a drive unit that causes the piston to reciprocate.

[0035] The cylinder is formed in a cylindrical shape. The cylinder can be arranged along the front-rear direction of the housing. The piston can reciprocate along the front-rear direction of the housing. In this embodiment, the front-rear direction and the axial direction of the housing can be understood as the same direction.

[0036] A compression space for refrigerant is formed at one end portion (front end portion) inside the cylinder.

[0037] One end portion (front end portion) of the piston is inserted into the inside of the cylinder.

[0038] A head is provided at one end portion (front end portion) of the piston. An intake port through which refrigerant is inhaled into the compression space is formed in the head. An intake valve for opening and closing the intake port is provided on the piston. The intake valve is configured to open the intake port when the piston moves to the bottom dead center and block the intake port when the piston moves to the top dead center.

[0039] The drive unit is constituted, for example, by a stator and a rotor that is connected to the piston and reciprocates axially with respect to the stator.

[0040] Thus, by the movement (reciprocating motion) of the rotor, the piston can be caused to reciprocate.

[0041] The stator is constituted, for example, by an outer stator and an inner stator that are arranged concentrically with each other, and stator coils wound around the outer stator and / or the inner stator.

[0042] A frame is provided on the outer surface of the cylinder.

[0043] The frame includes a main body portion coupled to the outer surface of the cylinder barrel and a flange portion that expands radially from one end portion (front end portion) of the main body portion.

[0044] A discharge valve that selectively opens and closes the compression space of the cylinder barrel is provided at one end portion (front end portion) of the cylinder barrel.

[0045] The discharge valve is configured to block the end portion of the cylinder barrel and can open the compression space when the pressure in the compression space reaches a set pressure.

[0046] The compression unit has a discharge cover that surrounds a discharge port for discharging the compressed refrigerant in the compression space.

[0047] A discharge space for discharging the compressed refrigerant in the compression space is formed inside the discharge cover.

[0048] The discharge cover is coupled to the front end portion of the cylinder barrel and the front end portion of the frame.

[0049] A nozzle for injecting gas (compressed refrigerant) between the inner diameter of the cylinder barrel and the outer diameter of the piston is provided in the cylinder barrel.

[0050] Thereby, the friction between the cylinder barrel and the piston can be reduced.

[0051] The nozzle is configured to communicate with the discharge space. Thereby, the compressed refrigerant (gas) in the discharge space can be supplied to the nozzle.

[0052] The drive portion is provided behind the frame (flange portion) along the axial direction.

[0053] The stator is provided behind the flange portion, and a stator cover is provided at the rear end portion of the stator. The stator cover has a disc shape and a through hole is provided in the center. The mover is inserted into the through hole in a reciprocating manner.

[0054] A resonance spring is provided behind the stator cover.

[0055] The resonance spring is composed of a first resonance spring and a second resonance spring.

[0056] The first resonance spring is disposed behind the stator cover, and the second resonance spring is disposed behind the first resonance spring.

[0057] A rear cover is coupled to the rear end portion of the resonance spring. The rear cover is disposed behind the second resonance spring.

[0058] In this embodiment, the rear cover is arranged at the rear end of the compression unit, and the discharge cover is provided at the front end of the compression unit.

[0059] In an embodiment of the present invention, the support unit, for example, has a front support unit that elastically supports the front end of the compression unit along the axial direction and a rear support unit that supports the rear end of the compression unit.

[0060] In an embodiment of the present invention, the rear support unit, for example, is constituted by the wire spring.

[0061] The wire spring has a plurality of straight portions arranged parallel to each other and curved portions that connect two adjacent straight portions in a manner capable of elastic deformation.

[0062] Among them, the wire spring, for example, is formed by bending a wire material with a circular cross-section capable of elastic deformation into a preset shape (pattern).

[0063] The wire spring is symmetrically formed with respect to the center line passing through the center of the housing.

[0064] More specifically, the wire spring is constituted by a first wire spring and a second wire spring that are symmetrically arranged with respect to the center line.

[0065] One end of each of the first wire spring and the second wire spring is connected to the compression unit, and the other ends of the first wire spring and the second wire spring are connected to each other by a connecting portion.

[0066] The wire spring is supported by the housing.

[0067] More specifically, the connecting portion that connects the first wire spring and the second wire spring is supported by the housing.

[0068] In an embodiment of the present invention, coupling studs are respectively provided at the rear end of the compression unit, so that one end of each of the first wire spring and the second wire spring can be connected.

[0069] Thereby, the combination and separation of the first wire spring, the second wire spring and the compression unit can be easily achieved.

[0070] In an embodiment of the present invention, an intake cover that forms an intake flow path for the refrigerant is provided at the rear end of the compression unit.

[0071] The intake cover can be formed to extend radially from the center of the intake unit. Thus, the intake flow path can be formed to extend radially from the center of the rear end of the intake unit.

[0072] The intake cover, for example, can be constituted in such a way as to surround the coupling studs.

[0073] Thus, it is possible to suppress the wire spring coupled to the compression unit from suddenly separating from the compression unit in the axial direction.

[0074] A fixing member coupling portion for coupling a fixing member that has passed through the suction cap may be provided in the coupling stud.

[0075] The fixing member may, for example, have an external thread portion, and the fixing member coupling portion correspondingly has an internal thread portion that corresponds to the external thread portion.

[0076] A fixing member insertion portion may be provided in the suction cap so that the fixing member can be coupled.

[0077] In one embodiment of the present invention, a suction pipe for sucking refrigerant is connected to the housing, and the suction pipe is connected to the circumferential surface of the housing (housing body).

[0078] Thus, it is possible to suppress an increase in the axial length of the compressor due to the suction pipe.

[0079] In one embodiment of the present invention, coupling rings that are coupled to the peripheries of the coupling studs are respectively provided at one end portions of the first wire spring and the second wire spring.

[0080] Thus, it is possible to quickly and easily achieve the coupling and separation of the first wire spring and the second wire spring and the compression unit.

[0081] A vibration insulation member for suppressing vibration transmission is provided between the coupling stud and the coupling ring.

[0082] The vibration insulation member may, for example, be formed of a rubber member.

[0083] Thus, it is possible to suppress vibration generated during driving of the compression unit from being transmitted to the housing through the wire springs (first wire spring and second wire spring).

[0084] In one embodiment of the present invention, a fixing bracket for fixing the connection portion of the wire spring is provided at the upper end of the inner surface of the housing.

[0085] A vibration insulation member for suppressing vibration transmission is provided between the fixing bracket and the connection portion.

[0086] Thus, it is possible to suppress vibration transmission between the wire spring and the fixing bracket. More specifically, it is possible to suppress vibration of the wire spring from being transmitted to the fixing bracket.

[0087] The vibration insulation member may, for example, be formed by insert molding the connection portion.

[0088] The vibration insulation member may be formed to surround the periphery of the connection part, that is, the upper surface, the bottom surface, and both side surfaces.

[0089] In an embodiment of the present invention, the fixing bracket may be formed to enable the vibration insulation member to be slidably inserted.

[0090] The fixing bracket may be formed, for example, with one side (front side) thereof open along the axial direction.

[0091] The vibration insulation member may be slidably inserted and coupled from the front to the rear of the fixing bracket along the axial direction.

[0092] In an embodiment of the present invention, an engaging part may be provided in the mutual contact area of the fixing bracket and the vibration insulation member, and the engaging part is engaged after the combination of the vibration insulation member and the fixing bracket to be able to inhibit movement.

[0093] The fixing bracket may be formed with a "U" cross-sectional shape so as to be able to contact the upper surface, the bottom surface, and one side surface (rear surface) of the vibration insulation part.

[0094] According to such a structural feature, the fixing bracket can be easily manufactured.

[0095] The vibration insulation member may be implemented, for example, as a quadrilateral cross-sectional shape.

[0096] In an embodiment of the present invention, the engaging part may be composed of a protrusion protruding from one of the mutual contact surfaces of the vibration insulation member and the fixing bracket toward the other and a protrusion accommodating part formed to accommodate the protrusion.

[0097] In an embodiment of the present invention, the protrusion may protrude along the axial direction from one side surface (rear end surface) of the vibration insulation member, and the protrusion accommodating part is formed through the rear end surface of the fixing bracket to be able to accommodate the protrusion.

[0098] Thus, the vibration insulation member and the fixing bracket can be easily combined, and movement of the vibration insulation member in the two side directions (directions perpendicular to the front-rear direction) of the fixing bracket can be inhibited.

[0099] In an embodiment of the present invention, the support unit has a front support unit provided at the front end of the compression unit and a rear support unit provided at the rear end of the compression unit, the rear support unit is composed of the wire spring, and the front support unit is composed of a pair of front springs respectively extending obliquely downward from the front end of the compression unit to the outside.

[0100] The pair of front springs expand and contract from the front end of the compression unit outward along a downwardly inclined direction. The pair of front springs are respectively implemented as compression coil springs.

[0101] In an embodiment of the present invention, a fixing bracket for fixing the connecting portion of the wire spring is provided at the upper end of the inner surface of the housing.

[0102] Thus, when the compression unit is driven, by the interaction of the reaction force of the front spring of the front support unit and the reaction force of the wire spring of the rear support unit, the rotational torque for rotating the housing can be minimized during the reciprocating motion of the piston.

[0103] In an embodiment of the present invention, a vibration insulation member for suppressing vibration transmission is provided between the fixing bracket and the connecting portion.

[0104] Thus, the vibration of the wire spring can be suppressed from being transmitted to the housing via the fixing bracket.

[0105] In an embodiment of the present invention, the support unit may include: a front support unit provided at the front end of the compression unit; and a rear support unit provided at the rear end of the compression unit, and the front support unit and the rear support unit respectively have the wire spring.

[0106] Thus, the structures of the front support unit and the rear support unit can be simplified and are easy to manufacture.

[0107] According to such a structural feature, the manufacturing cost of the front support unit and the rear support unit can be reduced.

[0108] In an embodiment of the present invention, the wire springs of the front support unit and the wire springs of the rear support unit may be respectively fixed at positions spaced apart from each other in the circumferential direction of the housing.

[0109] Thus, the rotational torque transmitted to the housing during the driving of the compression unit can be minimized, and the vibration of the housing caused by the rotational torque can be suppressed.

[0110] The wire springs of the front support unit and the wire springs of the rear support unit may be respectively fixed, for example, at locations spaced 180 degrees apart from each other in the circumferential direction of the housing.

[0111] Thus, by the interaction of the reaction force of the wire spring of the front support unit and the reaction force of the rear support spring, the rotational torque for rotating the housing can be minimized.

[0112] In one embodiment of the present invention, the respective straight portions of the first wire spring and the second wire spring each include a first straight portion having a first length, a second straight portion having a second length smaller than the first length, a third straight portion having the first length or the second length, and a fourth straight portion having the second length.

[0113] The second straight portion and the third straight portion are respectively arranged in parallel on both sides of the first straight portion, and the fourth straight portion is arranged in parallel on one side of the third straight portion.

[0114] According to such a structural feature, it is possible to suppress interference between the wire spring and the inner surface of the housing inside the housing having a circular cross-section. Thus, the wire spring can be freely installed inside the housing.

[0115] The respective curved portions of the first wire spring and the second wire spring each include a first curved portion connecting the first straight portion and the second straight portion, a second curved portion connecting the first straight portion and the third straight portion, and a third curved portion connecting the third straight portion and the fourth straight portion.

[0116] Among them, the first curved portion, the second curved portion, and the third curved portion can be configured to have the same radius of curvature.

[0117] The radius of curvature of the curved portion can be configured to be the same as half of the separation distance between the respective straight portions.

[0118] For example, when the interval between the straight portions is 10 mm, the radius of curvature of the curved portion can be configured to be 5 mm.

[0119] In one embodiment of the present invention, a coupling ring coupled to the compression unit can be provided on the second straight portion.

[0120] The coupling ring can be realized, for example, in an arc shape with one side open.

[0121] The coupling ring can be formed to extend from the end of the second straight portion in an arc shape with one side open.

[0122] The inner diameter of the coupling ring can be larger than the outer diameter of the coupling stud.

[0123] More specifically, the inner diameter of the coupling ring can be set in consideration of the thickness of the vibration insulation member for the coupling between the coupling ring and the coupling stud.

[0124] In one embodiment of the present invention, the fourth straight portions of the first wire spring and the second wire spring can be connected to each other as a single body by the connecting portion.

[0125] Since the first wire spring and the second wire spring are arranged symmetrically with respect to the center line passing through the center of the housing, the center line can pass through the center of the connecting portion.

[0126] In an embodiment of the present invention, the respective coupling rings of the first wire spring and the second wire spring may be arranged on the upper side of the connecting portion.

[0127] The connecting portion may include an arc section having a radius of curvature corresponding to the inner surface of the housing and a bent section bent from both ends of the arc section and respectively connected to the fourth straight sections of the first wire spring and the second wire spring.

[0128] Thus, interference between the wire spring (connecting portion) and the housing can be suppressed.

[0129] Among them, the arc section of the connecting portion may be arranged, for example, on the inner bottom surface of the housing.

[0130] According to such a structural feature, the transmission path of the vibration generated from the compression unit during driving of the compression unit and transmitted to the connecting portion through the first wire spring and the second wire spring and then transmitted to the leg of the housing is significantly shortened, so that the vibration of the housing can be minimized.

[0131] In an embodiment of the present invention, the respective straight portions of the first wire spring and the second wire spring may be inclined outwardly or inwardly with respect to the center line passing through the center of the housing.

[0132] Thus, the longitudinal rigidity and the lateral rigidity of the wire spring can be appropriately maintained respectively. According to such a structural feature, the vibration (displacement) generated from the compression unit can be appropriately alleviated by the wire spring.

[0133] In an embodiment of the present invention, the wire spring is formed with a rotation suppression section that protrudes longitudinally in the length direction of the connecting portion and suppresses rotation.

[0134] The rotation suppression section may be supported by the fixed bracket.

[0135] Thus, relative rotation of the wire spring (first wire spring and second wire spring) with respect to the housing (fixed bracket) can be suppressed.

[0136] A vibration insulating member is provided between the rotation suppression section and the fixed bracket.

[0137] Thus, transmission of the vibration of the wire spring (first wire spring and second wire spring) to the fixed bracket (housing) can be suppressed.

[0138] The vibration isolation member can be manufactured by inserting the rotation suppression section into a mold and performing injection molding.

[0139] As described above, according to an embodiment of the present invention, the support unit for supporting the compression unit has a wire spring. The wire spring has a plurality of straight portions arranged in parallel with each other and curved portions connecting two adjacent straight portions. Thus, the structural features of the support unit can be made simple and the support unit can be easily manufactured.

[0140] Moreover, a coupling stud for connecting the wire spring is provided at the rear end of the compression unit. Thus, the coupling and separation of the wire spring and the compression unit can be achieved quickly and easily.

[0141] Furthermore, a suction cover for forming a suction flow path is provided at the rear end of the compression unit. The suction cover is formed so as to surround the coupling stud. Thus, the detachment of the wire spring coupled to the coupling stud can be suppressed.

[0142] In addition, a suction pipe is provided on the circumferential surface of the housing. Thus, an increase in the axial length of the compressor due to the installation of the suction pipe can be suppressed.

[0143] Also, a coupling ring is provided at the end of the wire spring (first wire spring and second wire spring). Thus, the coupling and separation of the wire spring and the compression unit (coupling stud) can be achieved quickly and easily.

[0144] Moreover, a vibration isolation member is provided between the coupling ring of the wire spring and the coupling stud. Thus, the vibration of the compression unit can be suppressed from being transmitted to the wire spring.

[0145] The support unit has a front support unit and a rear support unit. The rear support unit has a wire spring, and the front support unit has a pair of front springs that extend obliquely downward and outward from the front end of the compression unit. Thus, the overall structure of the support unit is simplified and it is easy to manufacture, and the overall manufacturing cost of the support unit can be reduced.

[0146] By supporting the wire spring of the rear support unit at the upper end inside the housing, the reaction forces of the front spring and the wire spring act on each other, thereby minimizing the rotational torque for rotating the housing. Thus, the vibration of the housing caused by the rotational torque can be suppressed.

[0147] By supporting the connection portion of the wire spring by a fixing bracket of the housing and providing a vibration isolation member between the connection portion and the fixing bracket, the vibration of the wire spring can be suppressed from being transmitted to the fixing bracket.

[0148] Moreover, by slidably inserting the vibration isolation members of the fixed bracket and the connecting portion, the combination and separation of the wire spring and the fixed bracket can be achieved quickly and easily.

[0149] Moreover, by providing engaging portions for the fixed bracket and the vibration isolation member to engage with each other, the structure of the fixed bracket can be simplified and easily manufactured, and the vibration isolation member and the fixed bracket can be easily combined.

[0150] Moreover, the front support unit and the rear support unit are respectively constituted by the wire springs. Thus, not only the structures of the front support unit and the rear support unit are respectively simplified and easily manufactured, but also the manufacturing cost can be significantly reduced.

[0151] Moreover, the front support unit and the rear support unit are respectively constituted by the wire springs and are respectively fixed at positions spaced 180 degrees from each other in the circumferential direction along the housing. Thus, by making the reaction forces of the wire springs of the front support unit and the reaction forces of the wire springs of the rear support unit act on each other, the situation of generating a rotational torque in the housing can be minimized. Thereby, the vibration of the housing caused by the rotational torque can be significantly reduced.

[0152] Moreover, the first wire spring and the second wire spring include a first straight portion having a first length and second, third, and fourth straight portions having a second length, and the second and third straight portions are respectively arranged on both sides of the first straight portion, so as to be able to suppress interference with the inner surface of the housing having a circular cross-section. Thus, the first wire spring and the second wire spring can be freely installed inside the housing.

[0153] Moreover, the connecting portions of the wire springs respectively include arc section portions having a radius of curvature corresponding to the inner surface of the housing and bent section portions bent from both ends of the arc section portions and respectively connected to the fourth straight portions of the wire springs, so as to be able to suppress interference between the connecting portions and the housing.

[0154] Moreover, the respective straight portions of the first wire spring and the second wire spring are respectively arranged to be inclined inwardly or outwardly with respect to the center line passing through the center of the housing, so as to be able to appropriately maintain the longitudinal rigidity and lateral rigidity of the wire springs (the first wire spring and the second wire spring).

[0155] Moreover, the connecting portion of the wire spring has a rotation suppression section arranged along the axial direction, so as to be able to suppress relative rotation of the wire spring with respect to the housing (fixed bracket). BRIEF DESCRIPTION OF THE DRAWINGS

[0156] Figure 1 is a perspective view of a compressor according to an embodiment of the present invention.

[0157] Figure 2 is Figure 1 a cross-sectional view of the compressor.

[0158] Figure 3 is Figure 2 a perspective view of the compression unit.

[0159] Figure 4 is Figure 2 an enlarged view of the discharge cover area.

[0160] Figure 5 is Figure 4 a cross-sectional view of the front spring area.

[0161] Figure 6 shows Figure 3 the inside of the suction cover.

[0162] Figure 7 is Figure 3 a side view.

[0163] Figure 8 is Figure 7 an enlarged cross-sectional view of the main part.

[0164] Figure 9 is Figure 6 a side cross-sectional view of the combined state of the fixed bracket and the vibration insulation member.

[0165] Figure 10 shows Figure 9 the state before the fixed bracket and the vibration insulation member are combined.

[0166] Figure 11 is Figure 9 a plan cross-sectional view.

[0167] Figure 12 is a cross-sectional view of the compressor according to another embodiment of the present invention.

[0168] Figure 13 is Figure 12 a side cross-sectional view of the front support unit.

[0169] Figure 14 is Figure 12 a side cross-sectional view of the rear support unit.

[0170] Figure 15 shows simultaneously Figure 12 the combined state of the front support unit and the rear support unit.

[0171] Figure 16 is Figure 13 a perspective view of the fixed bracket and the vibration insulation member before combination.

[0172] Figure 17 is Figure 16 the front view of the fixing bracket.

[0173] Figure 18 is Figure 16 the cross-sectional view of the combined state of the vibration insulation member and the fixing bracket.

[0174] Figure 19 is the side view of the support unit (rear support unit) of the compressor according to another embodiment of the present invention.

[0175] Figure 20 shows Figure 19 the rear support unit.

[0176] Figure 21 shows Figure 19 the suction cover.

[0177] Figure 22 is Figure 19 the cross-sectional view before the fixing bracket and the vibration insulation member are combined.

[0178] Figure 23 is Figure 21 the cross-sectional view after the vibration insulation member and the fixing bracket are combined.

[0179] Figure 24 is the side view of the rear support unit of the compressor according to another embodiment of the present invention.

[0180] Figure 25 shows Figure 24 the suction cover.

[0181] Figure 26 shows Figure 24 the rear support unit.

[0182] Figure 27 is Figure 24 the cross-sectional view before the fixing bracket and the vibration insulation member are combined. Detailed Description

[0183] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings. In this specification, even for different embodiments, the same or similar structural elements will be given the same or similar reference numerals, and the description thereof will be replaced by the initial description. Unless explicitly indicated otherwise in the context, the singular expressions used in this specification include plural expressions. Also, during the process of describing the embodiments disclosed in this specification, if it is determined that a detailed description of related well-known technologies may affect the gist of the embodiments disclosed in this specification, then the detailed description thereof will be omitted. Moreover, the attached drawings are only for easily understanding the embodiments disclosed in this specification, and should not be construed as limiting the technical idea disclosed in this specification by the attached drawings.

[0184] Figure 1 is a perspective view of a compressor according to an embodiment of the present invention. Figure 2 is Figure 1 a cross-sectional view of the compressor. As Figure 1 and Figure 2 shown, the compressor 100 of this embodiment includes a housing 110, a compression unit 200, and a support unit 700.

[0185] The housing 110 forms a sealed accommodation space inside.

[0186] The housing 110 is constituted by, for example, a housing main body 120 having a substantially cylindrical shape and covers 125 that block both end portions of the housing main body 120.

[0187] The compressor 100 of this embodiment has a length of approximately 30 cm and a diameter of approximately 10 cm.

[0188] The housing 110 is arranged in such a way that its length is horizontal. In this embodiment, Figure 2 the horizontal direction can represent the left - right direction in the drawings. Also, Figure 2 the left - right direction can represent the front - rear direction of the housing 110.

[0189] According to such a structural feature, a refrigerator having the compressor 100 of this embodiment can significantly reduce the height of the mechanical chamber, and thus, without increasing the size of the cabinet (refrigerator body), it is also possible to increase the size of the internal food storage space.

[0190] A plurality of legs 155 are provided at the bottom of the housing 110.

[0191] The plurality of legs 155 can be respectively provided on both sides of the bottom of the housing 110.

[0192] A pair of the plurality of legs 155 may be provided at the front end and the rear end of the housing 110, respectively. An anti-vibration rubber coupling portion 156 may be provided on the plurality of legs 155 so that an anti-vibration rubber (not shown) can be coupled. The anti-vibration rubber coupling portion 156 may be formed, for example, to have a circular cross-section with one side open. In the present embodiment, the anti-vibration rubber coupling portion 156 may be open along the axial direction.

[0193] An intake pipe 130 for sucking refrigerant to be compressed is provided in the housing 110.

[0194] In the present embodiment, the intake pipe 130 may be provided on the circumferential surface of the housing main body 120. The intake pipe 130 may be provided on the rear side surface (circumferential surface) of the housing 110.

[0195] Thus, compared with the prior art in which the axial length of the compressor 100 is increased because the intake pipe 130 is provided at the rear end of the housing 110, the axial length of the compressor 100 (housing 110) can be shortened in the present embodiment.

[0196] The intake pipe 130 may be provided on the side surface of the rear end of the housing main body 120.

[0197] A discharge pipe 135 for discharging the compressed refrigerant is provided in the housing 110.

[0198] The discharge pipe 135 is provided at the front end of the housing 110 (housing main body 120).

[0199] A process pipe 140 is provided in the housing 110 (housing main body 120) so that refrigerant can be filled therein. The process pipe 140 is provided on one side (front side in the drawing) of the discharge pipe 135.

[0200] Terminals 150 are provided in the housing 110 so that power can be supplied. The terminals 150 may be connected to a commercial power supply, for example, or connected to a power supply unit (e.g., an inverter) (not shown) connected to the commercial power supply.

[0201] The terminals 150 may be electrically connected to a driving unit 400 (to be described later) of the compression unit 200 inside the housing 110. Thus, the driving unit 400 of the compression unit 200 can be supplied with power from the power supply unit and driven.

[0202] The compression unit 200 includes, for example, a cylinder 210, a piston 230 with one end inserted into the cylinder 210, and a driving unit 400 that provides a driving force to reciprocate the piston 230 relative to the cylinder 210.

[0203] The cylinder 210 is implemented as a cylindrical shape with both sides open, for example. The length of the cylinder 210 is longer than its diameter. The cylinder 210 is arranged along the length direction of the housing 110. A compression space 220 for refrigerant is formed on one side (front side) inside the cylinder 210. One end of the piston 230 is inserted inside the cylinder 210.

[0204] The piston 230 can be implemented as a cylindrical shape with one end blocked. The piston 230 is provided with a head 232 at one end (front end). The piston 230 is configured to be able to reciprocate between a top dead center where it is inserted into the cylinder 210 at the maximum depth and a bottom dead center that is axially separated from the top dead center to the maximum extent.

[0205] An intake port 234 is provided in the head 232 so that refrigerant can be inhaled into the compression space 220. An intake valve 235 for opening and closing the intake port 234 is provided on the piston 230.

[0206] The intake valve 235 is configured to block the intake port 234 when the piston 230 moves toward the top dead center, and to open the intake port 234 when the piston 230 moves toward the bottom dead center, for example. The intake valve 235 is coupled to the front end of the piston 230 (head 232). The intake valve 235 can be coupled to the head 232 using a fixing member 236.

[0207] A discharge valve assembly 215 for selectively opening and closing the compression space 220 is provided in front of the cylinder 210. The discharge valve assembly 215 includes a discharge valve 217 that blocks the front opening of the cylinder 210 and a discharge valve spring 218 that applies an elastic force to enable the discharge valve 217 to block the front opening of the cylinder 210, for example.

[0208] The discharge valve 217 can be implemented as a circular plate (disc) shape. The discharge valve 217 can contact the front end of the cylinder 210 to block the front opening of the cylinder 210.

[0209] The discharge valve spring 218 applies an elastic force to the discharge valve 217 so that the discharge valve 217 can contact the front end of the cylinder 210. The discharge valve 217 can be pressed by the discharge valve spring 218 to maintain a state of contacting the front end of the cylinder 210. For example, when the pressure inside the compression space 220 reaches a preset pressure, the discharge valve spring 218 can elastically deform to open the front opening of the cylinder 210 by the discharge valve 217. The elastic force of the discharge valve spring 218 can be set to be below the set pressure inside the compression space 220.

[0210] In this embodiment, although the case where the discharge valve 217 contacts the front end of the cylinder 210 and blocks the front opening of the cylinder 210 is illustrated, this is merely an illustration, and the present invention is not limited thereto. As an example, the discharge valve 217 may also be configured to be inserted into the interior of the front opening of the cylinder 210 and block the front opening of the cylinder 210. In this embodiment, considering that the compressed refrigerant inside the compression space 220 will be discharged, the front opening of the cylinder 210 may be referred to as a discharge port 212.

[0211] In addition, a suction muffler 260 is provided at the rear end of the piston 230. The suction muffler 260 may be formed in a substantially cylindrical shape. One end portion (front end portion) of the suction muffler 260 is integrally coupled to the piston 230. Accordingly, the suction muffler 260 may be configured to reciprocate in conjunction with the piston 230. The internal space of the suction muffler 260 may be axially divided into a plurality of spaces. A guide member 264 for communicating the plurality of spaces may be provided inside the suction muffler 260.

[0212] Each of the guide members 264 is configured to have a relatively small flow cross-sectional area compared to the plurality of spaces. Accordingly, the refrigerant sucked into the interior of the suction muffler 260 expands in the plurality of spaces having a wide flow cross-sectional area, contracts in the guide member 264 having a small flow cross-sectional area, and can reduce noise by repeating such a process.

[0213] A frame 250 may be provided on the outer surface of the cylinder 210. The frame 250 may be configured to have a main body portion 252 coupled to the outer surface of the cylinder 210 and a flange portion 254 that expands radially at one end portion (front end portion) of the main body portion 252, for example. The main body portion 252 may be press-fitted and coupled to the outer surface of the cylinder 210, for example.

[0214] A discharge cover 280 may be provided at the front end of the cylinder 210 and the frame 250. A discharge space 282 for discharging the compressed refrigerant is provided inside the discharge cover 280. The discharge valve spring 218 may be provided inside the discharge cover 280. The discharge space 282 may be disposed in front of the discharge valve spring 218.

[0215] Inside the discharge cover 280, a first plenum 2801 and a second plenum 2802 are provided, which form a plurality of discharge spaces 282 communicating with each other. Among them, the first plenum 2801 and the second plenum 2802 are respectively constituted by having outer wall surfaces that are in surface contact with the inner wall surface of the discharge cover 280. The first plenum 2801 and the second plenum 2802 are configured such that a first discharge space 2821 and a second discharge space 2822 can be respectively provided inside the respective outer wall surfaces. Thus, it is possible to effectively suppress the transfer of the thermal energy of the high-temperature refrigerant compressed and discharged in the compression space 220 to the outside of the discharge cover 280.

[0216] The discharge space 282 includes: a first discharge space 2821 communicating with the compression space 220; a second discharge space 2822 communicating with the first discharge space 2821; and a third discharge space 2823 formed between the discharge cover 280 and the second plenum 2802 so as to communicate with the second discharge space 2822.

[0217] On one side of the discharge cover 280, a refrigerant outflow hole (not shown) communicating with the third discharge space 2823 is provided. For example, at the refrigerant outflow hole, the other end of an annular pipe 285 whose one end is connected in a communicating manner is connected in a communicating manner. On one side of the third discharge space 2823, a first refrigerant movement path 522 is formed, so that the compressed refrigerant inside the third discharge space 2823 can move.

[0218] The first refrigerant movement path 522 is connected in a manner that communicates with a second refrigerant movement path 290 formed on the frame 250. The second refrigerant movement path 290 of the frame 250 extends between the main body portion 252 of the frame 250 and the cylinder 210 through the inside of the flange portion 254 of the frame 250.

[0219] On the cylinder 210, a nozzle 294 is provided so that refrigerant (gas) can be injected into the inside. Thus, the friction between the inner diameter surface of the cylinder 210 and the outer diameter surface of the piston 230 can be reduced. On the outer diameter surface of the cylinder 210, an inlet 292 communicating with the nozzle 294 is formed. The inlet 292 can be formed to be recessed radially on the outer diameter surface of the cylinder 210.

[0220] In addition, a driving unit 400 for driving the piston 230 is provided behind the frame 250 (flange 254). The driving unit 400 includes, for example, a stator 410 and a mover 430 disposed to be reciprocating relative to the stator 410. The mover 430 includes a permanent magnet 432.

[0221] The stator 410 is composed of, for example, an outer stator 412, an inner stator 414 that is spaced apart and concentrically arranged on the inner side of the outer stator 412, and a stator coil 416 wound between the outer stator 412 and the inner stator 414. The stator coil 416 is composed of, for example, a bobbin 4161 that is spaced apart and arranged on the outer side of the inner stator 414, and a coil portion 4162 wound on the bobbin 4161. A gap of a predetermined size is formed between the inner stator 414 and the bobbin 4161. The permanent magnet 432 of the mover 430 is inserted between the inner stator 414 and the bobbin 4161 so as to be reciprocatable.

[0222] A stator cover 440 is provided at the rear of the stator 410. The front end of the stator 410 may contact the flange portion 254 of the frame 250, and the rear end of the stator 410 may contact the stator cover 440 to be supported. The stator cover 440 may be implemented in a circular plate shape, for example. A through portion is formed at the center of the stator cover 440. The mover 430 is inserted into the through portion in a manner that it can reciprocate along the axial direction.

[0223] The front area of the mover 430 is inserted between the stator coil 416 and the inner stator 414 in a reciprocating manner. The rear end of the mover 430 is coupled to the rear end of the piston 230. Thus, when the mover 430 reciprocates, the piston 230 can reciprocate in conjunction with it.

[0224] A resonance spring 460 is provided at the rear of the stator cover 440. The resonance spring 460 includes a first resonance spring 4601 and a second resonance spring 4602 spaced apart in the axial direction. A spring support portion 4603 having one end (front end) coupled to the mover 430 is provided between the first resonance spring 4601 and the second resonance spring 4602.

[0225] One end (front end) of the first resonant spring 4601 contacts the stator cover 440 , and the first resonant spring 4601 is provided in a plurality of circumferentially spaced portions. The rear end of the first resonant spring 4601 contacts the front surface of the spring support portion 4603 .

[0226] One end (front end) of the second resonance spring 4602 contacts the rear surface of the spring support portion 4603, and a plurality of them are provided at intervals in the circumferential direction.

[0227] A rear cover 480 is provided at the rear end of the second resonance spring 4602. The rear end of the second resonance spring 4602 contacts the front surface of the spring support portion 4603. The rear cover 480 may be integrally and fixedly coupled to the stator cover 440. The rear cover 480 has a stator cover coupling portion 4801 that extends forward so as to be able to contact the stator cover 440.

[0228] Figure 3 is Figure 2 a perspective view of the compression unit. Referring together to Figure 2 and Figure 3 , the driving unit 400 is provided behind the flange portion 254 of the frame 250. The rear end of the flange portion 254 contacts the front end of the outer stator 412, and the stator coil 416 is disposed inside the outer stator 412.

[0229] The stator cover 440 is coupled to the rear end of the stator 410, and the first resonance spring 4601 and the second resonance spring 4602 are disposed behind the stator cover 440. The rear cover 480 is coupled to the rear end of the second resonance spring 4602, and a plurality of stator cover coupling portions 4801 are provided on the rear cover 480 so as to be able to be coupled to the stator cover 440. The plurality of stator cover coupling portions 4801 extend forward along the axial direction. The plurality of stator cover coupling portions 4801 may be formed in a plurality of numbers at intervals in the circumferential direction of the stator cover 440. In this embodiment, the plurality of stator cover coupling portions 4801 are implemented as three, but the present invention is not limited thereto.

[0230] In addition, the compressor 100 of this embodiment has a support unit 700 that separates the compression unit 200 from the inner surface of the housing 110 and elastically supports it.

[0231] The support unit 700 has, for example, a front support unit 710 that elastically supports the front end of the compression unit 200 and a rear support unit 750 that elastically supports the rear end of the compression unit 200.

[0232] The rear support unit 750 is constituted by, for example, a wire spring 760. The wire spring 760 has a plurality of straight portions L and a curved portion C that elastically deforms to connect two adjacent straight portions L (refer to Figure 7 ).

[0233] In the present embodiment, the wire spring 760 can be formed, for example, by bending a wire material (e.g., spring steel) having a circular cross-section that can be elastically deformed into a preset shape (pattern). Among them, the preset shape (pattern) can represent the shape having a plurality of straight portions L and curved portions C that elastically connect two adjacent straight portions L to each other as described above.

[0234] Figure 4 Is Figure 2 An enlarged view of the discharge cap region, Figure 5 Is Figure 4 A cross-sectional view of the front spring region. As Figure 4 Shown, a ring-shaped tube 285 having one end connected to the discharge tube 135 is connected to one side of the discharge cap 280. A movement guide 550 that restricts the front end of the compression unit 200 from moving radially is provided in front of the discharge cap 280.

[0235] The movement guide 550 has, for example, an inner guide 551 and an outer guide 552 that are concentric with each other in the radial direction. The inner guide 551 can have, for example, a cap shape with one side open. The outer guide 552 can be implemented as a cap shape with one side open. The inner guide 551 and the outer guide 552 can be implemented to be arranged at a preset gap from each other in the radial direction. Among them, the preset gap between the inner guide 551 and the outer guide 552 can be set in consideration of the radial movement range of the front end of the compression unit 200.

[0236] A support guide 545 can be provided at the front end of the discharge cap 280 so that the inner guide 551 can be coupled. The inner guide 551 can be coupled to the support guide 545 with its opening facing forward. The outer guide 552 can be coupled to the housing 110 (front cover) with its opening facing backward.

[0237] In addition, a front support unit 710 can be provided at the front end of the compression unit 200. The front support unit 710 can be provided on the discharge cap 280, for example. The front support unit 710 can be composed of a front spring 7101 that extends obliquely downward from the bottom of the discharge cap 280 to the outside.

[0238] As Figure 5 Shown, the front support unit 710 can have a spring support member 7102 that is coupled to the compression unit 200 (discharge cap 280) and supports the front spring 7101.

[0239] The spring support member 7102 may, for example, have a contact portion 7103 that contacts the discharge cover 280, and rod portions 7104 that project downwardly and obliquely from the contact portion 7103 toward the inner diameter surface of the housing 110.

[0240] The front spring 7101 may, for example, be implemented as a compression coil spring.

[0241] The front spring 7101 may be arranged so as to be respectively expandable and contractible along the downwardly inclined direction in which the rod portions 7104 extend. A foot portion 7106 may be provided at the lower end of the front spring 7101. The foot portion 7106 may contact the inner surface of the housing 110.

[0242] Figure 6 is a diagram showing Figure 3 the interior of the suction cover, Figure 7 is Figure 3 a side view of Figure 8 is Figure 7 an enlarged cross-sectional view of the main part of Figure 6 and Figure 7 As shown in

[0243] The wire spring 760 is constituted, for example, by a plurality of straight portions L arranged in parallel with each other and curved portions C that elastically connect two adjacent straight portions L.

[0244] The wire spring 760 has a connecting portion 7605 that connects the first wire spring 7601 and the second wire spring 7602 integrally.

[0245] The wire spring 760 may be configured such that the first wire spring 7601 and the second wire spring 7602 are arranged symmetrically with respect to each other.

[0246] The wire spring 760 is configured such that the first wire spring 7601 and the second wire spring 7602 are arranged symmetrically with respect to each other with respect to the center line passing through the connecting portion 7605.

[0247] The center line passing through the connecting portion 7605 may be arranged, for example, to pass through the center O of the housing 110. Thus, the compression unit 200 can be stably supported with respect to the housing 110.

[0248] The end portions of the first wire spring 7601 and the second wire spring 7602 are respectively connected to the compression unit 200. Binding rings 7603 are respectively provided at the end portions of the first wire spring 7601 and the second wire spring 7602.

[0249] As Figure 8 shown, binding convex columns 4803 are respectively formed on the compression unit 200, so that the first wire spring 7601 and the second wire spring 7602 can be respectively bound. The binding convex columns 4803 can be formed, for example, to protrude rearward from the rear cover 480 respectively. The binding convex columns 4803 can be formed, for example, by deforming a part of the rear cover 480 to protrude rearward. The binding convex columns 4803 can also be configured to be bound to the rear surface of the rear cover 480 by welding.

[0250] In addition, a through portion 4802 is provided at the rear end portion of the compression unit 200, so that refrigerant can be inhaled. The through portion 4802 can be formed by penetrating the center of the rear cover 480.

[0251] The binding convex columns 4803 can be respectively formed around the through portion 4802.

[0252] An inhalation cover 850 forming an inhalation flow path 8506 for refrigerant is provided at the rear end portion of the compression unit 200. The inhalation cover 850 can be formed of a synthetic resin member, for example.

[0253] The inhalation cover 850 is composed of a cylindrical portion 8501 surrounding the periphery of the through portion 4802 and a radial section portion 8502 extending radially from the cylindrical portion 8501, for example.

[0254] One side of the cylindrical portion 8501 is formed in an open manner, and its open side is bound to the rear cover 480 in a contacting manner.

[0255] The cylindrical portion 8501 has an inner diameter that is larger than that of the through portion 4802.

[0256] The cylindrical portion 8501 forms an internal space to enable a relatively large amount of refrigerant to be temporarily stored around the through portion 4802.

[0257] A radial section portion 8502 is formed on one side of the cylindrical portion 8501. The end portion of the radial section portion 8502 has a length corresponding to the circumference (border) of the rear cover 480.

[0258] The suction cover 850 has a shaft section 8503 that bends axially from the end of the radial section 8502. The shaft section 8503 can be arranged, for example, on the outer surface of the stator cover joint 4801 that extends from the rear cover 480 to the stator cover 440. Refrigerant movement paths are respectively formed inside the shaft section 8503 and the radial section 8502.

[0259] An inflow member 8504 that extends radially along the housing 110 towards the inner surface of the housing 110 can be provided in the shaft section 8503. The inflow member 8504 can be formed of a synthetic resin member, for example.

[0260] One end of the inflow member 8504 can be connected to the suction cover 850 (shaft section 8503), and the other end is arranged towards the inner surface of the housing 110, for example. One end of the inflow member 8504 can have the same diameter and be joined to the suction cover 850. The other end of the inflow member 8504 can be formed in the shape of a funnel whose inner and outer diameters gradually expand along the protruding direction.

[0261] The inflow member 8504 can be arranged at a preset distance from the inner surface of the housing 110. Thus, when the compression unit 200 moves, it is possible to prevent the inflow member 8504 from impacting and contacting the inner surface of the housing 110.

[0262] The inflow member 8504 can be arranged facing the suction pipe 130, for example. The refrigerant inhaled into the interior of the housing 110 from the suction pipe 130 can flow through the inflow member 8504 and into the shaft section 8503. The refrigerant flowing into the shaft section 8503 can move axially and then radially along the radial section 8502. The refrigerant moving along the radial section 8502 can be temporarily stored inside the cylindrical section 8501 and then inhaled into the suction muffler 260 through the through-hole 4802. The refrigerant suction flow path 8506 is formed inside the inflow member 8504, the shaft section 8503, the radial section 8502, and the cylindrical section 8501.

[0263] The suction cover 850 can be formed to surround a region of the wire spring 760.

[0264] Refer to Figure 6 , a lead-out portion 85051 can be formed by cutting in the upper region of the suction cover 850 so that the first wire spring 7601 and the second wire spring 7602 can be respectively led out.

[0265] The inhalation cap 850 may have a coupling post blocking portion 8505 that couples in a manner to block the coupling post 4803.

[0266] The coupling post blocking portion 8505 may be formed to protrude outward from the cylindrical portion 8501 respectively. The coupling post blocking portion 8505 may be coupled in a manner to surround the coupling post 4803 along the axial direction behind the coupling post 4803. In the coupling post blocking portion 8505, lead-out portions 85051 for leading out the first wire spring 7601 and the second wire spring 7602 respectively may be formed by cutting. In this embodiment, the lead-out portions 85051 may be formed, for example, by cutting the upper ends of the respective coupling post blocking portions 8505.

[0267] The inhalation cap 850 may be coupled to the compression unit 200 using a fixing member 8510. A washer 8511 may be provided between the fixing member 8510 and the inhalation cap 850.

[0268] As Figure 7 shown, a plurality of fixing member coupling portions 8507 are provided on the inhalation cap 850, so that the fixing member 8510 can be coupled. A part of the fixing member coupling portions 8507 may be formed with insertion holes 8508 that penetrate through the respective coupling post blocking portions 8505.

[0269] At least one of the fixing member coupling portions 8507 may be formed to protrude radially from the cylindrical portion 8501. At least one of the fixing member coupling portions 8507 may be configured to contact the rear cover 480 and be coupled using the fixing member 8510. Insertion holes 8508 through which the fixing member 8510 can be inserted may be formed respectively through at least one of the fixing member coupling portions 8507.

[0270] Referring Figure 6 and Figure 7 to, each straight portion L of the first wire spring 7601 and the second wire spring 7602 may respectively include a first straight portion L1 having a first length l1, a second straight portion L2 having a second length l2 smaller than the first length l1, a third straight portion L3 having the first length l1 or the second length l2, and a fourth straight portion L4 having the second length l2. In this embodiment, a case where the third straight portion L3 has the same first length l1 as the first straight portion L1 is illustrated, but this is only an illustration, and the present invention is not limited thereto. The third straight portion L3 may also be configured to have the second length l2.

[0271] In this embodiment, the second straight portion L2 is disposed below the first straight portion L1 at a parallel interval, and the third straight portion L3 is disposed above the first straight portion L1 at a parallel interval.

[0272] The fourth straight portion L4 is disposed above the third straight portion L3 at a parallel interval.

[0273] The curved portion C has a first curved portion C1 connecting the first straight portion L1 and the second straight portion L2, a second curved portion C2 connecting the first straight portion L1 and the third straight portion L3, and a third curved portion C3 connecting the third straight portion L3 and the fourth straight portion L4.

[0274] Coupling rings 7603 are respectively provided on the second straight portion L2.

[0275] The coupling ring 7603 is spaced from the end of the second straight portion L2 and can be formed as a circular ring with one side open.

[0276] The connecting portion 7605 is connected to the fourth straight portion L4 of each of the first wire spring 7601 and the second wire spring 7602. The connecting portion 7605 is supported by a fixing bracket 790 provided on the housing 110.

[0277] In addition, the coupling rings 7603 connected to the second straight portion L2 of each of the first wire spring 7601 and the second wire spring 7602 are respectively coupled to the coupling studs 4803.

[0278] As Figure 8 shown, coupling studs 4803 protrude rearward from the rear cover 480 respectively. Vibration insulation members 770 for insulating vibration are respectively coupled between the coupling studs 4803 and the coupling rings 7603.

[0279] The vibration insulation member 770 can be formed of a rubber member, for example.

[0280] The vibration insulation member 770 has a cylindrical shape.

[0281] The inner diameter of the vibration insulation member 770 can be formed corresponding to the outer diameter of the coupling stud 4803.

[0282] The outer diameter of the vibration insulation member 770 can be greater than the inner diameter of the coupling ring 7603, for example. A recessed portion 7701 recessed along the radial direction can be formed on the outer surface of the vibration insulation member 770, so that the coupling ring 7603 can be coupled.

[0283] The inhalation cover 850 (inhalation cover blocking part 8505) can be coupled to the outer surface of the coupling boss 4803.

[0284] An internal thread part 48031 can be provided on the coupling boss 4803 so as to be threadably coupled to the external thread part of the fixing member 8510.

[0285] The insertion hole 8508 of the inhalation cover blocking part 8505 of the inhalation cover 850 can communicate with the internal thread part 48031. Thus, the fixing member 8510 inserted through the insertion hole 8508 of the inhalation cover blocking part 8505 is threadably coupled to the internal thread part of the coupling boss 4803, thereby being able to prevent the wire spring 760 from suddenly separating from the coupling boss 4803. The inner surface of the inhalation cover blocking part 8505 contacts the end of the coupling boss 4803 and the end of the vibration insulation member 770 respectively, thereby being able to prevent the vibration insulation member 770 and the coupling ring 7603 of the wire spring 760 from disengaging rearward.

[0286] In addition, the wire spring 760 can be supported by the housing 110.

[0287] In the wire spring 760, the connection part 7605 connecting the first wire spring 7601 and the second wire spring 7602 can be supported by the housing 110.

[0288] A fixing bracket 790 for fixedly supporting the wire spring 760 is provided on the housing 110.

[0289] For example, the upper surface of the fixing bracket 790 can be fixedly coupled to the inner surface of the housing 110. For example, the fixing bracket 790 can be welded and coupled to the inner surface of the housing 110.

[0290] Figure 9 Yes Figure 6 Side cross-sectional view of the combined state of the fixing bracket and the vibration insulation member Figure 10 Shows Figure 9 View of the state before the fixing bracket and the vibration insulation member are combined Figure 11 Yes Figure 10 Plain cross-sectional view. As Figures 9 to 11 Shown, the fixing bracket 790 has a "U" cross-sectional shape with one side open. The fixing bracket 790 can be coupled to the inner surface of the housing 110 in such a way that the opening faces the front of the compressor 100, for example.

[0291] The fixed bracket 790 has an inner surface portion 7901 and an outer surface portion 7902 arranged in parallel with each other, and a connecting end portion 7903 connecting the inner surface portion 7901 and the outer surface portion 7902. Among them, the outer surface portion 7902 can be formed in such a way as to be in surface contact with the inner surface of the housing 110, for example. The outer surface portion 7902 can be welded to the inner surface of the housing 110.

[0292] In addition, a vibration insulation member 780 is provided at the connecting portion 7605 of the wire spring 760, so as to be able to suppress the transmission of the vibration of the wire spring 760 to the fixed bracket 790.

[0293] The vibration insulation member 780 can be formed of a rubber member, for example.

[0294] The vibration insulation member 780 can be combined with the inside of the fixed bracket 790 in a slidable manner. The vibration insulation member 780 can be formed in a rectangular parallelepiped shape, for example.

[0295] The vibration insulation member 780 can be formed by, for example, inserting the connecting portion 7605 of the wire spring 760 into a mold and molding it.

[0296] The connecting portion 7605 of the wire spring 760 can be configured to have a rotation suppression section 7606, so as to be able to suppress the relative rotation of the wire spring 760 with respect to the housing 110 after connecting the wire spring 760 and the compression unit 200.

[0297] As Figure 11 shown, the rotation suppression section 7606 can be formed to protrude longitudinally in the length direction of the connecting portion 7605, for example.

[0298] The vibration insulation member 780 can be formed to surround the rotation suppression section 7606.

[0299] Referring to Figure 9 , the vibration insulation member 780 can be configured such that its outer surface surrounds the rotation suppression section 7606 from the front, rear, bottom, and top with a preset thickness.

[0300] Thus, the wire spring 760 and the fixed bracket 790 are separated by the corresponding thickness to suppress direct contact, so as to be able to suppress the transmission of the vibration of the wire spring 760 to the fixed bracket 790.

[0301] The vibration insulation member 780 can be slidably combined with the fixed bracket 790.

[0302] The vibration insulation member 780 can be press-fitted and combined with the fixed bracket 790.

[0303] The vibration isolation member 780 may have a thickness corresponding to the width between the inner surface portion 7901 and the outer surface portion 7902 of the fixed bracket 790.

[0304] The vibration isolation member 780 and the fixed bracket 790 may have an engaging portion 800 that is engaged after being combined to suppress their movement.

[0305] The engaging portion 800 may be constituted by, for example, a protrusion 8001 protruding from one of the mutual contact surfaces of the vibration isolation member 780 and the fixed bracket 790 and a protrusion receiving portion 8002 formed on the other of the mutual contact surfaces so as to receive the protrusion 8001.

[0306] The protrusion 8001 may be formed to protrude, for example, on the vibration isolation member 780.

[0307] The protrusion 8001 may be formed to protrude, for example, at the rear end of the vibration isolation member 780.

[0308] The protrusion receiving portion 8002 may be formed on the fixed bracket 790.

[0309] The protrusion receiving portion 8002 may be formed to penetrate through the connecting end portion 7903 of the fixed bracket 790.

[0310] According to such a structural feature, when it is necessary to install the rear support unit 750, the coupling rings 7603 of the first wire spring 7601 and the coupling rings 7603 of the second wire spring 7602 are respectively coupled to the vibration isolation member 770, and the corresponding vibration isolation members 770 are respectively coupled to the corresponding coupling studs 4803.

[0311] The suction cover 850 is coupled to the rear of the compression unit 200, and the suction cover 850 is respectively coupled to the compression unit 200 by coupling and fixing members 8510.

[0312] Next, the vibration isolation member 780 is inserted and coupled from the front to the rear of the fixed bracket 790. The vibration isolation member 780 may have a preset interference and be press-fitted and coupled inside the fixed bracket 790. When the vibration isolation member 780 is coupled to the fixed bracket 790, the rear end of the compression unit 200 may be suspended and supported by the first wire spring 7601 and the second wire spring 7602. The front end of the compression unit 200 may be elastically supported by the pair of front springs 7101.

[0313] When the installation of the rear support unit 750 is completed, a cover may be coupled to the rear opening of the housing 110.

[0314] Further, when power is supplied to the stator 410 at the start of operation, the magnetic field formed by the stator coil 416 and the magnetic field of the permanent magnet 432 of the rotor 430 interact with each other, causing the rotor 430 to reciprocate axially.

[0315] When the piston 230 moves rearward, the suction port 234 opens to suck refrigerant into the compression space 220, and when the piston 230 moves forward, the refrigerant in the compression space 220 is compressed.

[0316] When the pressure in the compression space 220 reaches a preset pressure, the discharge valve 217 opens the discharge port 212 of the cylinder 210, and the compressed refrigerant in the compression space 220 is discharged into the discharge space 282. The refrigerant in the discharge space 282 moves to the first discharge space 2821, the second discharge space 2822, and the third discharge space 2823.

[0317] A part of the refrigerant in the third discharge space 2823 is discharged to the outside of the housing 110 via the annular pipe 285 and through the discharge pipe 135. Another part of the refrigerant in the third discharge space 2823 moves along the first refrigerant movement path 522 and the second refrigerant movement path 290 and moves toward the inflow port 292. The refrigerant that has moved to the inflow port 292 is jetted between the inner diameter surface of the cylinder 210 and the outer diameter surface of the piston 230 through the nozzle 294. Thereby, the friction between the inner diameter surface of the cylinder 210 and the outer diameter surface of the piston 230 can be significantly reduced.

[0318] Further, when the piston 230 is driven forward and backward, the reaction force of the front spring 7101 in front of the compression unit 200 and the reaction force of the wire spring 760 behind the compression unit 200 interact with each other, enabling the rotational torque transmitted to the housing 110 to be minimized. Thereby, by minimizing the rotational torque of the housing 110 caused by the forward and backward driving of the piston 230, the vertical vibration of the housing 110 caused by the rotational torque of the housing 110 can be significantly reduced.

[0319] Thereby, the compressor 100 of the present embodiment reduces the noise caused by the vibration of the housing 110, enabling quiet operation.

[0320] Figure 12 is a cross-sectional view of a compressor according to another embodiment of the present invention, Figure 13 is Figure 12 a side cross-sectional view of the front support unit of Figure 14 is Figure 12 a side cross-sectional view of the rear support unit ofFigure 15 is a view showing the combined state of the front support unit and the rear support unit simultaneously. As Figure 12 shown, the compressor 100a of the present embodiment has a housing 110, a compression unit 200, and a support unit 700a. Figures 12 to 15 As shown, the housing 110 has, for example, a cylindrical housing body 120 and covers 125 that block both end portions of the housing body 120.

[0321] The compression unit 200 has, for example, a cylinder 210, a piston 230 disposed at one end portion inside the cylinder 210, and a drive unit 400 that reciprocates the piston 230 in the axial direction.

[0322] A frame 250 is provided on the outer surface of the cylinder 210. The frame 250 has, for example, a main body portion 252 coupled to the outer surface of the cylinder 210 and a flange portion 254 that expands radially at one end portion of the main body portion 252.

[0323] The drive unit 400 has, for example, a stator 410 and a rotor 430 that reciprocates relative to the stator 410. The stator 410 has an outer stator 412, an inner stator 414 disposed concentrically with each other, and a stator coil 416 wound around the outer stator 412 or the inner stator 414.

[0324] The rotor 430 has a permanent magnet 432. The permanent magnet 432 can be inserted between the stator coil 416 and the inner stator 414 in a reciprocating manner.

[0325] In addition, the support unit 700a has a front support unit 710a provided at the front end portion of the compression unit 200 and a rear support unit 750a provided at the rear end portion of the compression unit 200.

[0326] The front support unit 710a and the rear support unit 750a each include, for example, wire springs 760a1, 760a2. The wire springs 760a1, 760a2 have a plurality of straight portions L disposed parallel to each other and a curved portion C that elastically connects two adjacent straight portions L.

[0327] The wire springs 760a1, 760a2 can each be composed of a first wire spring 7601 and a second wire spring 7602. The first wire spring 7601 and the second wire spring 7602 each have the plurality of straight portions L and the curved portion C and are disposed symmetrically with respect to each other.

[0328] The wire springs 760a1, 760a2 can each be composed of a first wire spring 7601 and a second wire spring 7602. The first wire spring 7601 and the second wire spring 7602 each have the plurality of straight portions L and the curved portion C and are disposed symmetrically with respect to each other.

[0329] The wire springs 760a1 and 760a2 each have a connecting portion 7605 that connects the first wire spring 7601 and the second wire spring 7602 and are configured.

[0330] For convenience of explanation, the wire spring 760a1 of the front support unit 710a may be referred to as the front wire spring 760a1, and the wire spring 760a2 of the rear support unit 750a is referred to as the rear wire spring 760a2.

[0331] The connecting portions 7605a1 and 7605a2 of the front wire spring 760a1 and the rear wire spring 760a2 may be configured to be supported by the housing 110, respectively.

[0332] The support positions of the connecting portions 7605a1 and 7605a2 of the front wire spring 760a1 and the rear wire spring 760a2 may be formed at positions separated from each other by 180 degrees along the circumferential direction of the housing 110.

[0333] Thus, when the piston 230 is driven forward and backward, the reaction forces of the front wire spring 760a1 and the rear wire spring 760a2 interact with each other, so that the rotational torque transmitted to the housing 110 due to the forward and backward driving of the piston 230 can be minimized. Thus, the vertical vibration caused by the rotational torque of the housing 110 can be suppressed.

[0334] A fixing bracket 790a1 for fixedly supporting the connecting portion 7605a1 of the front wire spring 760a1 and a fixing bracket 790a2 for fixedly supporting the connecting portion 7605 of the rear wire spring 760a2 may be provided on the housing 110.

[0335] Refer to together Figure 13 and Figure 15 , the front wire spring 760a1 has a first wire spring 7601a1 and a second wire spring 7602a1 arranged symmetrically with each other.

[0336] The straight portion L of the front wire spring 760a1 (the first wire spring 7601a1 and the second wire spring 7602a1) includes, for example, a first straight portion L1 having a first length l1, a second straight portion L2 having a second length l2, a third straight portion L3, and a fourth straight portion L4 and is configured.

[0337] The second straight portion L2 is provided above the first straight portion L1, and the third straight portion L3 is provided below the first straight portion L1. The fourth straight portion L4 is provided below the third straight portion L3.

[0338] A coupling ring 7603a1 having an annular shape is provided on the second straight portion L2.

[0339] The curved portion C has a first curved portion C1 connecting the first straight portion L1 and the second straight portion L2, a second curved portion C2 connecting the first straight portion L1 and the third straight portion L3, and a third curved portion C3 connecting the third straight portion L3 and the fourth straight portion L4.

[0340] At the front end of the compression unit 200 (the discharge cover 280), a coupling projection post 2809 is provided so that the coupling ring 7603a1 of the front wire spring 760a1 can be coupled. A coupling vibration insulation member 2810 is inserted between the coupling projection post 2809 and the coupling ring 7603a1. Thus, vibration of the compression unit 200 can be suppressed from being transmitted to the front wire spring 760a1. In this embodiment, each coupling ring 7603a1 of the front wire spring 760a1 blocks its front area by means of a support guide member 545 coupled to the front end of the discharge cover 280, so that each coupling ring 7603a1 can be prevented from disengaging forward from the corresponding coupling projection post 2809.

[0341] The fourth straight portion L4 of the first wire spring 7601a1 and the fourth straight portion L4 of the second wire spring 7602a1 of the front wire spring 760a1 are integrally connected by a connection portion 7605a.

[0342] The connection portion 7605a1 of the front wire spring 760a1 can be supported by a front fixing bracket 790a1.

[0343] A vibration insulation member 780a1 is provided between the front fixing bracket 790a1 and the connection portion 7605a1 of the front wire spring 760a1.

[0344] The front fixing bracket 790a1 can be disposed, for example, at a location that is separated by approximately 40 degrees to 60 degrees in the clockwise direction along the circumferential direction from the center of the lower end of the housing 110.

[0345] As Figure 14 and Figure 15 shown, the rear wire spring 760a2 can be formed in the same shape as the front wire spring 760a1.

[0346] More specifically, the rear wire spring 760a2 has a first wire spring 7601a2 and a second wire spring 7602a2 formed symmetrically with respect to each other.

[0347] The rear wire spring 760a2 is constituted by having a connection portion 7605a2 connecting the first wire spring 7601a2 and the second wire spring 7602a2.

[0348] The straight portion of the rear wire spring 760a2 may include a first straight portion L1 having a first length l1, a second straight portion L2 having a second length l2, a third straight portion L3, and a fourth straight portion L4. Coupling rings 7603a2 are respectively provided on the second straight portions L2 of the rear wire spring 760a2.

[0349] The coupling rings 7603a2 of the rear wire spring 760a2 are respectively coupled to coupling studs 4803 formed on the rear end portion (rear cover 480) of the compression unit 200. A vibration insulation member 770a is provided between the coupling studs 4803 formed on the rear cover 480 and the coupling rings 7603a2 of the rear wire spring 760a2.

[0350] The rear wire spring 760a2 is supported by a rear fixing bracket 790a2.

[0351] The rear fixing bracket 790a2 may be disposed at a location separated by 40 degrees to 60 degrees in the clockwise direction from the center of the upper end of the housing 110.

[0352] The front fixing bracket 790a1 and the rear fixing bracket 790a2 may be respectively fixed at positions separated by 180 degrees along the circumferential direction of the housing 110.

[0353] A vibration insulation member 780 is provided at the connection portion 7605a2 of the rear wire spring 760a2. Thus, vibration of the rear wire spring 760a2 can be suppressed from being transmitted to the rear fixing bracket 790a2.

[0354] As Figure 14 shown, a suction cover 850a is provided at the rear end portion of the compression unit 200. The suction cover 850a has a cylindrical portion 8501, a radial section portion 8502 extending radially from the cylindrical portion 8501, and an axial section portion 8503 formed by bending along the axial direction. An inflow member 8504 is provided on the suction cover 850a in a manner facing the suction pipe 130. A coupling stud blocking portion 8505 is provided on the suction cover 850a to block the rear end portion of the coupling stud 4803. The structural features of the suction cover 850a of this embodiment are different only in the positions of the coupling stud blocking portion 8505 and the fixing member coupling portion 8507 compared with the aforementioned suction cover 850, and other structural features may be similarly configured. Figures 1 to 11 The perspective view before the fixing bracket and the vibration insulation member are coupled,

[0355] Figure 16 is Figure 13 the front view of the fixing bracket, Figure 17 is Figure 16 the front view of the fixing bracket,Figure 18 Yes Figure 16 Cross-sectional view of the combined state of the vibration isolation member and the fixing bracket. In this embodiment, since the structural features of the rear fixing bracket 790a2, the connecting portion 7605a2 of the rear wire spring 760a2, and the vibration isolation member (not shown) are similar to the structural features of the front fixing bracket 790a1, the connecting portion 7605a1 of the front wire spring 760a1, and the vibration isolation member 780a1, the specific description thereof will be omitted, and instead, the description of the structural features of the front fixing bracket 790a1, the connecting portion 7605a1 of the front wire spring 760a1, and the vibration isolation member 780a1 will be used instead.

[0356] As Figures 16 to 18 shown, the front fixing bracket 790a1 has a "U" cross-sectional shape with an opening on one side. The front fixing bracket 790a1 can be arranged with its opening facing backward. The connecting portion 7605a1 of the front wire spring 760a1 can be inserted and combined from the rear to the front of the front fixing bracket 790a1.

[0357] The front fixing bracket 790a1 is composed of an inner surface portion 7901, an outer surface portion 7902 arranged outside the inner surface portion 7901, and a connecting end portion 7903 connecting the inner surface portion 7901 and the outer surface portion 7902. In this embodiment, the front fixing bracket 790a1 may further be composed of a blocking portion 7904 that blocks the lower ends of the inner surface portion 7901 and the outer surface portion 7902. Thereby, the downward detachment of the vibration isolation member 780a1 inserted and combined on the inner surface of the front fixing bracket 790a1 can be more effectively suppressed.

[0358] The connecting portion 7605a1 of the front wire spring 760a1 is composed of a rotation suppression section 7606a1 that suppresses the relative rotation of the first wire spring 7601a1 and the second wire spring 7602a1 with respect to the housing 110.

[0359] The vibration isolation member 780a1 is configured to surround the rotation suppression section 7606a1.

[0360] Since the vibration isolation member 780a1 is inserted and combined inside the front fixing bracket 790a1 in a state of surrounding the rotation suppression section 7606a1, it can not only suppress the vibration of the front wire spring 760a1 from being transmitted to the front fixing bracket 790a1 through the connecting portion 7605a1, but also suppress the movement (rotation) of the compression unit 200 in the front-rear direction of the housing 110.

[0361] The vibration insulation member 780a1 and the front fixing bracket 790a1 of the front wire spring 760a1 can be slidably coupled to each other. The vibration insulation member 780a1 can be press-fitted inside the front fixing bracket 790a1.

[0362] The vibration insulation member 780a1 and the front fixing bracket 790a1 have an engaging portion 800 that is engaged after being coupled to suppress relative movement therebetween.

[0363] The engaging portion 800 includes, for example, a protrusion 8001 protruding from one of the mutual contact surfaces of the vibration insulation member 780a1 and the fixing bracket 790a1, and a protrusion receiving portion 8002 formed on the other of the mutual contact surfaces so as to receive the protrusion 8001.

[0364] According to such a structural feature, when it is necessary to couple the front support unit 710a to the compression unit 200, the respective coupling rings 7603a1 of the front wire spring 760a1 are coupled by interposing vibration insulation members 770a1 between the corresponding coupling studs 4803 of the discharge cover 280.

[0365] When it is necessary to couple the rear wire spring 760a2 to the rear end of the compression unit 200, first, vibration insulation members 770a2 are interposed to couple the respective coupling rings 7603a2 of the rear wire spring 760a2 to the coupling studs 4803 of the rear cover 480. Then, the suction cover 850a is coupled to the rear end of the compression unit 200. Thereby, rearward detachment of the respective coupling rings 7603a2 of the rear wire spring 760a2 can be suppressed.

[0366] Next, the respective vibration insulation members 780 of the front wire spring 760a1 and the rear wire spring 760a2 are respectively inserted and coupled to the front fixing bracket 790a1 and the rear fixing bracket 790a2. Thereby, the compression unit 200 can be separated from the inner wall surface of the housing 110 and elastically supported respectively. After the installation of the compression unit 200, the internal space of the housing 110 can be sealed.

[0367] In addition, when the operation starts and power is supplied to the stator coil 416, the mover 430 reciprocates axially together with the piston 230. As a result, the refrigerant sucked into the interior of the housing 110 through the suction pipe 130 is compressed in the compression space 220 and discharged into the discharge space 282. A part of the refrigerant in the discharge space 282 is discharged to the outside of the housing 110 via the annular pipe 285 and through the discharge pipe 135. Another part of the refrigerant in the discharge space 282 moves to the inflow port 292 through the first refrigerant movement path 522 and the second refrigerant movement path 290, and is then injected into the interior of the cylinder 210 through the nozzle 294.

[0368] In the present embodiment, the compression unit 200 is elastically supported by the front wire spring 760a1 and the rear wire spring 760a2 which are arranged to be separated from each other by 180 degrees in the circumferential direction of the housing 110. When the piston 230 moves back and forth, the rotational torque transmitted to the housing 110 can be minimized due to the interaction of the reaction force of the front wire spring 760a1 and the reaction force of the rear wire spring 760a2. As a result, the vertical vibration caused by the rotational torque of the housing 110 can be significantly reduced.

[0369] Figure 19 It is a side view of a support unit (rear support unit) of a compressor according to another embodiment of the present invention. Figure 20 It shows Figure 19 the rear support unit. Figure 21 It shows Figure 19 the suction cover. Figure 22 It is Figure 19 a cross-sectional view before the fixing bracket and the vibration insulation member are combined. Figure 23 It is Figure 21 a cross-sectional view after the vibration insulation member and the fixing bracket are combined. The compressor 100b of the present embodiment includes a housing 110, a compression unit 200, and a support unit 700b.

[0370] As described above, the housing 110 includes a cylindrical housing main body 120 and covers 125 that block both ends of the housing main body 120, respectively.

[0371] As described above, the compression unit 200 includes a cylinder 210, a piston 230 disposed at one end thereof inside the cylinder 210, and a drive unit 400 that reciprocates the piston 230.

[0372] A frame 250 is provided on the outer surface of the cylinder 210. The frame 250 includes a main body portion 252 coupled to the outer surface of the cylinder 210 and a flange portion 254 that radially expands at the front end of the main body portion 252.

[0373] As described above, the driving unit 400 includes a stator 410 and a rotor 430 that reciprocates relative to the stator 410.

[0374] In addition, as Figure 19 shown, the support unit 700b of this embodiment includes a front support unit 710a provided at the front end of the compression unit 200 and a rear support unit 750b provided at the rear end of the compression unit 200.

[0375] As described in the foregoing embodiment regarding Figures 1 to 11 the front support unit 710a includes a front spring 7101 that extends obliquely downward and outward from the bottom of the front end (discharge cover 280) of the compression unit 200. The front support unit 710a includes a spring support member 7102 coupled to the bottom of the discharge cover 280. As described above, the spring support member 7102 includes a contact portion 7103 that contacts the bottom of the discharge cover 280 and rod portions 7104 that extend obliquely downward and outward from both ends of the contact portion 7103.

[0376] In addition, as Figure 20 shown, the rear support unit 750b may include a wire spring 760b. The wire spring 760b includes a plurality of straight portions L and curved portions C that elastically connect two adjacent straight portions L.

[0377] The wire spring 760b may include a first wire spring 7601b, a second wire spring 7602b, each having the plurality of straight portions L and curved portions C and arranged symmetrically with respect to each other, and a connecting portion 7605b that connects the first wire spring 7601b and the second wire spring 7602b into one body.

[0378] The first wire spring 7601b and the second wire spring 7602b may be arranged symmetrically with respect to a center line passing through the center O of the housing 110.

[0379] In this embodiment, the first wire spring 7601b and the second wire spring 7602b are arranged symmetrically with respect to a center line passing vertically through the center O of the housing 110.

[0380] In this embodiment, an intake cover 850b that forms a refrigerant intake flow path 8506 is provided at the rear end of the compression unit 200.

[0381] Each straight portion L of the first wire spring 7601b and the second wire spring 7602b of the wire spring 760b includes a first straight portion L1 having a first length l1, a second straight portion L2 having a second length l2 smaller than the first length l1, a third straight portion L3, and a fourth straight portion L4.

[0382] The second straight portion L2 is disposed in parallel and spaced apart below the first straight portion L1, and the third straight portion L3 and the fourth straight portion L4 are respectively disposed above the first straight portion L1.

[0383] The curved portion C has a first curved portion C1 connecting the first straight portion L1 and the second straight portion L2, a second curved portion C2 connecting the first straight portion L1 and the third straight portion L3, and a third curved portion C3 connecting the third straight portion L3 and the fourth straight portion L4.

[0384] Binding rings 7603b are respectively provided on the second straight portions L2 of the first wire spring 7601b and the second wire spring 7602b, so that they can be respectively bound to the compression unit 200. Each of the binding rings 7603b can be respectively formed into a ring shape (ring shape) with one side open.

[0385] Binding studs 4803 protruding rearward are respectively provided at the rear end portion (rear cover 480) of the compression unit 200, so that the binding rings 7603b of the first wire spring 7601b and the second wire spring 7602b can be respectively bound.

[0386] In this embodiment, the connection portions 7605b of the first wire spring 7601b and the second wire spring 7602b can be disposed in the central region of the housing 110.

[0387] The connection portion 7605b of the wire spring 760b can be fixedly supported by a fixing bracket 790b.

[0388] The fixing bracket 790b can be fixedly coupled to the upper end of the inner surface of the housing 110.

[0389] The fixing bracket 790b can be welded and coupled to the inner surface of the housing 110.

[0390] A rotation inhibition section 7606b for inhibiting the rotation of the first wire spring 7601b and the second wire spring 7602b can be provided at the connection portion 7605b of the wire spring 760b.

[0391] The rotation inhibition section 7606b can be supported by the fixing bracket 790b.

[0392] The rotation suppression section 7606b can be arranged, for example, along the vertical direction of the housing 110.

[0393] The wire spring 760b can be formed with a vibration isolation member 780b, so as to suppress the transmission of the vibration of the wire spring 760b to the fixed bracket 790b.

[0394] The vibration isolation member 780b can be formed to surround the rotation suppression section 7606b.

[0395] The vibration isolation member 780b can be formed of a rubber member, for example.

[0396] As Figure 21 shown, the suction cover 850b is composed of a cylindrical portion 8501, a radial section portion 8502 extending radially from one side of the cylindrical portion 8501, and an axial section portion 8503 extending axially from the radial section portion 8502. An inflow member 8504 is provided on the axial section portion 8503 of the suction cover 850b and is arranged to face the suction pipe 130.

[0397] On the suction cover 850b, stud blocking portions 8505 for blocking the coupling studs 4803 can be respectively provided.

[0398] The stud blocking portions 8505 can be respectively implemented as a stud blocking portion 8505 for blocking the coupling stud 4803 of the coupling ring to which the first wire spring 7601b is coupled and a stud blocking portion 8505 for blocking the coupling stud 4803 of the coupling ring to which the second wire spring 7602b is coupled.

[0399] Each of the stud blocking portions 8505 can extend outward (to the left and right in the drawing) from the outer surface of the cylindrical portion 8501.

[0400] On the suction cover 850b, a lead-out portion 85051 can be formed so as to be able to lead out the wire spring 760b and the fixed bracket 790b. The lead-out portion 85051 can be respectively formed by cutting on the upper surface of the through-hole portion 4802 and the upper surface of each of the stud blocking portions 8505.

[0401] On each of the stud blocking portions 8505, insertion holes 8508 can be respectively formed therethrough, so as to be able to couple a fixing member 8510 threadedly coupled to each of the coupling studs 4803.

[0402] As Figure 22As shown, the fixed bracket 790b may include a vibration isolation member coupling portion 790b1 for inserting and coupling the vibration isolation member 780b of the wire spring 760b, and a housing coupling portion 790b2 that extends from the vibration isolation member coupling portion 790b1 and is coupled to the housing 110.

[0403] In this embodiment, an example is shown in which the housing coupling portion 790b2 is coupled to the center of the upper end inside the housing 110. However, this is only an example, and the present invention is not limited thereto. The housing coupling portion 790b2 may also be configured to extend downward from the vibration isolation member coupling portion 790b1 and be coupled to the center of the lower end inside the housing 110.

[0404] The vibration isolation member coupling portion 790b1 may be configured, for example, to slidably couple the vibration isolation member 780b in the vertical direction.

[0405] The vibration isolation member coupling portion 790b1 may include, for example, an inner surface portion 790b11 and an outer surface portion 790b12 that are disposed with the vibration isolation member 780b therebetween and spaced apart from each other, and a blocking portion 790b13 that blocks the bottom of the inner surface portion 790b11 and the outer surface portion 790b12.

[0406] The vibration isolation member 780b and the vibration isolation member coupling portion 790b1 may have an engaging portion 800 that is engaged after being combined to inhibit relative movement.

[0407] As Figure 23 shown, the engaging portion 800 may include, for example, a protrusion 8001 protruding from one of the mutual contact surfaces of the vibration isolation member 780b and the vibration isolation member coupling portion 790b1, and a protrusion receiving portion 8002 that can accommodate the protrusion 8001. The protrusion 8001 may protrude downward from the bottom surface of the vibration isolation member 780b. The protrusion receiving portion 8002 may be formed through the blocking portion 790b13. Thus, the movement of the vibration isolation member 780b to both sides (the left and right sides in the drawing) of the vibration isolation member coupling portion 790b1 can be inhibited.

[0408] The housing coupling part 790b2 may be configured, for example, to have an extending section 790b21 extending upward from the outer surface part 790b12 and a bent section 790b22 formed by bending the end of the extending section 790b21. The bent section 790b22 may be configured to have a curved cross-section, so as to be in surface contact with the inner surface of the housing 110. In this embodiment, since the housing coupling part 790b2 (extending section 790b21) extends upward from the outer surface part 790b12, the height of the outer surface part 790b12 is not clearly distinguishable, but the height of the outer surface part 790b12 may be configured to be the same as or similar to the height of the inner surface part 790b11.

[0409] According to such a structural feature, when it is necessary to couple the rear support unit 750b to the compression unit 200, a vibration isolation member 770b is interposed to couple the coupling rings 7603b of the first wire spring 7601b and the second wire spring 7602b to the coupling studs 4803 of the rear cover 480, respectively.

[0410] Next, the vibration isolation member 780b of the wire spring 760b is coupled downward from the upper side of the vibration isolation member coupling part 790b1 of the fixed bracket 790b. When the vibration isolation member 780b is coupled, the protrusion 8001 is inserted and coupled into the protrusion receiving part 8002, so as to be able to suppress the left and right movement of the vibration isolation member 780b.

[0411] In addition, when power is turned on to the stator 410 at the start of operation, the rotor 430 causes the piston 230 to reciprocate axially.

[0412] When the piston 230 moves, by making the reaction forces of a pair of front springs 7101 of the front support unit 710 arranged 180 degrees apart from each other in the circumferential direction of the housing 110 and the reaction forces of the first wire spring 7601b and the second wire spring 7602b of the rear support unit 750b interact with each other, the rotational torque transmitted to the housing 110 due to the forward and backward movement of the piston 230 is reduced, so that the up and down vibration of the housing 110 caused by the rotational torque can be significantly reduced. Thus, the silent operation of the compressor 100b can be achieved.

[0413] Figure 24 It is a side view of a rear support unit of a compressor according to another embodiment of the present invention, Figure 25 It shows Figure 24 the suction cover of Figure 26 It shows Figure 24 the rear support unit of Figure 27 It isFigure 24 Cross-sectional view before the fixed bracket and the vibration insulation member are combined. As Figure 24 shown, the compressor 100c of this embodiment has a housing 110, a compression unit 200, and a support unit 700c.

[0414] The housing 110 has, for example, a housing body 120 having a cylindrical shape and covers 125 that block both end portions of the housing body 120.

[0415] The compression unit 200 is constituted by, for example, a cylinder 210, a piston 230 disposed at one end portion inside the cylinder 210, and a drive unit 400 that reciprocates the piston 230 in the axial direction.

[0416] A frame 250 is provided on the periphery of the cylinder 210. The frame 250 includes a main body portion 252 coupled to the periphery of the cylinder 210 and a flange portion 254 that is expanded and formed at the front end portion of the main body portion 252.

[0417] The drive unit 400 is disposed behind the frame 250 (flange portion 254).

[0418] The drive unit 400 has a stator 410 and a rotor 430 that reciprocates relative to the stator 410.

[0419] A stator cover 440 is coupled to the rear end portion of the stator 410, and a resonance spring 460 is disposed behind the stator cover 440. The resonance spring 460 includes a first resonance spring 4601 and a second resonance spring 4602 that are arranged in the axial direction. A rear cover 480 is provided behind the resonance spring 460 (second resonance spring 4602). The rear cover 480 is integrally and fixedly coupled to the stator cover 440.

[0420] In addition, the support unit 700c can be constituted by, for example, a front support unit (not shown) provided at the front end portion of the compression unit 200 and a rear support unit 750c provided at the rear end portion of the compression unit 200.

[0421] The front support unit and the rear support unit 750c can be respectively fixedly supported at positions that are 180 degrees apart from each other in the circumferential direction of the housing 110.

[0422] More specifically, for example, in this embodiment, the front support unit can be fixedly supported at the center of the upper end of the inner surface of the housing 110, and the rear support unit 750c is supported at the center of the lower end of the inner surface of the housing 110 that is 180 degrees apart in the circumferential direction of the housing 110.

[0423] The front support unit and the rear support unit 750c may be configured to include wire springs 760c, respectively. The wire spring 760c has a plurality of straight portions L arranged in parallel to each other and curved portions C that elastically connect two adjacent straight portions L to each other.

[0424] The front support unit may be configured to have a structure similar to that of the wire spring 760 of the aforementioned rear support unit 750 or the wire spring 760a2 of the aforementioned rear support unit 750a, and is connected to the front end (discharge cover 280) of the compression unit 200 and fixedly supported at the center of the upper end inside the housing 110. Therefore, a detailed description thereof will be omitted. Figures 1 to 11 with respect to the structure of the wire spring 760 of the aforementioned rear support unit 750 or Figures 12 to 18 with respect to the structure of the wire spring 760a2 of the aforementioned rear support unit 750a, and is connected to the front end (discharge cover 280) of the compression unit 200 and fixedly supported at the center of the upper end inside the housing 110. Therefore, a detailed description thereof will be omitted.

[0425] As Figure 24 and Figure 26 shown, the rear support unit 750c may include a first wire spring 7601c, a second wire spring 7602c, each having a plurality of straight portions L and curved portions C and arranged symmetrically to each other, and a connecting portion 7605c that connects the first wire spring 7601c and the second wire spring 7602c into one body.

[0426] In this embodiment, the connecting portion 7605c may be arranged below the plurality of straight portions L.

[0427] In this embodiment, the wire spring 760c may be fixedly supported at the center of the lower end inside the housing 110.

[0428] Each of the plurality of straight portions L of the first wire spring 7601c and the second wire spring 7602c may include a first straight portion L1 having a first length l1, a second straight portion L2 having a second length l2 smaller than the first length l1, a third straight portion L3, and a fourth straight portion L4.

[0429] The first straight portion L1 may be arranged to incline downward inwardly, and the second straight portion L2 is provided above the first straight portion L1. The third straight portion L3 is arranged below the first straight portion L1, and the fourth straight portion L4 is arranged below the third straight portion L3.

[0430] A coupling ring 7603c having an open arc shape on one side is connected to the second straight portion L2.

[0431] The connecting portion 7605c is respectively connected to the fourth straight portion L4.

[0432] Each curved portion C of the first wire spring 7601c and the second wire spring 7602c, for example, respectively has a first curved portion C1 connecting the first straight portion L1 and the second straight portion L2, a second curved portion C2 connecting the first straight portion L1 and the third straight portion L3, and a third curved portion C3 connecting the third straight portion L3 and the fourth straight portion L4.

[0433] The connecting portion 7605c is composed of an arc section 76051 formed in a substantially arc shape along the inner surface shape of the housing 110 and bent sections 76052 that are bent from both end portions of the arc section 76051 and connected to the respective fourth straight portions L4 of the first wire spring 7601c and the second wire spring 7602c.

[0434] A through-hole 4802 for refrigerant to flow in is provided at the rear end portion (rear cover 480) of the compression unit 200.

[0435] Combination bosses 4803 are respectively provided on the periphery of the through-hole 4802, so that the respective combination rings 7603c of the first wire spring 7601c and the second wire spring 7602c of the rear support unit 750c can be combined.

[0436] Internal thread portions 48031 are respectively provided on the respective combination bosses 4803, so that a fixing member 8510 (refer to Figure 8 ) can be threadedly combined and fixed.

[0437] An intake cover 850c is provided at the rear end portion of the compression unit 200. The intake cover 850c surrounds the through-hole 4802 and forms an intake flow path 8506 for refrigerant inside.

[0438] As Figure 25 shown, the intake cover 850c is composed of a cylindrical portion 8501 formed to surround the periphery of the through-hole 4802 of the rear cover 480, a radial section 8502 extending radially from the cylindrical portion 8501, and an axial section 8503 bent axially from the radial section 8502.

[0439] An inflow member 8504 is provided on the intake cover 850c (axial section 8503) and is arranged to face the intake pipe 130 of the housing 110.

[0440] The intake cover 850c has a combination boss blocking portion 8505 that is combined in a manner to block the rear end portion of the combination boss 4803. Although not clearly shown in the drawings, an extraction portion can be formed by cutting as described above in the combination boss blocking portion 8505, so that the first wire spring 7601c and the second wire spring 7602c can be respectively extracted.

[0441] Insertion holes 8508 are respectively formed through the engaging stud blocking portions 8505 so that the fixing members 8510 engaged on the engaging studs 4803 can be inserted therethrough.

[0442] A fixing member engaging portion 8507 is provided on the inhalation cap 850c so that the fixing members 8510 engaged on the rear cover 480 can be engaged. Insertion holes 8508 are formed through the fixing member engaging portion 8507 so that the fixing members 8510 can be inserted therethrough.

[0443] In addition, as Figure 27 shown, a rotation inhibiting section 7606c is provided at the connecting portion 7605c of the wire spring 760c to inhibit relative rotation of the first wire spring 7601c and the second wire spring 7602c with respect to the housing 110. The rotation inhibiting section 7606c may be formed by bending convexly in the longitudinal direction along the length direction of the connecting portion 7605c.

[0444] The rotation inhibiting section 7606c of the wire spring 760c may be supported by the housing 110.

[0445] A fixing bracket 790c is provided on the housing 110 to fixedly support the wire spring 760c.

[0446] The fixing bracket 790c has, for example, a "U" cross-sectional shape with one side open.

[0447] The fixing bracket 790c is constituted by, for example, an inner surface portion 7901c, an outer surface portion 7902c disposed at a distance outside the inner surface portion 7901c, and a connecting end portion 7903c connecting the inner surface portion 7901c and the outer surface portion 7902c.

[0448] The fixing bracket 790c may be arranged, for example, with its opening facing forward.

[0449] The outer surface portion 7902c may be arranged to face the inner surface of the housing 110, and the inner surface portion 7901c is arranged above the outer surface portion 7902c. The connecting end portion 7903c is arranged to face the rear of the housing 110.

[0450] A vibration insulating member 780c for insulating vibration may be provided between the fixing bracket 790c and the connecting portion 7605c (rotation inhibiting section 7606c).

[0451] The vibration insulating member 780c may be formed of, for example, a rubber member. The vibration insulating member 780c has, for example, a rectangular parallelepiped shape.

[0452] The vibration isolation member 780c may be formed in such a manner as to surround the periphery of the rotation suppression section 7606c of the connection section 7605c. For example, the vibration isolation member 780c may be manufactured by inserting the rotation suppression section 7606c into the interior of a mold and then performing injection molding.

[0453] The fixed bracket 790c and the vibration isolation member 780c may be slidably coupled.

[0454] The vibration isolation member 780c may be press-fitted into the interior of the fixed bracket 790c.

[0455] The vibration isolation member 780c and the fixed bracket 790c may have an engaging portion 800 that is engaged after being combined to suppress relative movement.

[0456] The engaging portion 800 has a protrusion 8001 that protrudes from one of the mutual contact surfaces of the vibration isolation member 780c and the fixed bracket 790c, and a protrusion receiving portion 8002 that is formed on the other of the mutual contact surfaces so as to be able to receive the protrusion 8001.

[0457] The protrusion 8001 may be formed to protrude rearward from the rear end of the vibration isolation member 780c, and the protrusion receiving portion 8002 is formed through the connection end portion 7903c of the fixed bracket 790c.

[0458] According to such a structural feature, when it is necessary to combine the compression unit 200 and the rear support unit 750c, the vibration isolation member 770c is interposed to respectively combine the coupling rings 7603c of the first wire spring 7601c and the second wire spring 7602c with the corresponding coupling studs 4803. The suction cover 850c is combined to block the ends of the respective coupling studs 4803, and the fixing members 8510 are respectively fastened.

[0459] The vibration isolation member 780c of the connection portion 7605c of the first wire spring 7601c and the second wire spring 7602c is inserted and combined from the front to the rear into the fixed bracket 790c provided at the center of the lower end inside the housing 110.

[0460] When the combination of the compression unit 200 and the support unit 700c is completed, the housing 110 may be sealed.

[0461] In addition, when power is supplied to the stator coil 416 at the start of operation, the mover 430 may cause the piston 230 to reciprocate axially.

[0462] When the piston 230 moves rearward, the refrigerant flows into the compression space 220. When the piston 230 moves forward, the refrigerant in the compression space 220 is compressed.

[0463] When the discharge valve 217 opens, the compressed refrigerant in the compression space 220 moves through the first discharge space 2821, the second discharge space 2822, and into the third discharge space 2823.

[0464] A part of the refrigerant in the third discharge space 2823 is discharged to the outside of the housing 110 through the discharge pipe 135, and another part of the refrigerant in the third discharge space 2823 moves through the first refrigerant flow path 522, the second refrigerant flow path 290, and into the inlet 292. The refrigerant at the inlet 292 is sprayed between the inner diameter surface of the cylinder 210 and the outer diameter surface of the piston 230. Thereby, the friction between the inner diameter surface of the cylinder 210 and the outer diameter surface of the piston 230 can be reduced.

[0465] In addition, in the compressor 100c of the present embodiment, the interaction between the wire springs of the front support unit fixed and supported at positions 180 degrees apart from each other in the circumferential direction along the housing 110 and the wire spring 760c of the rear support unit 750c minimizes the transmission of the rotational torque generated when the piston 230 moves back and forth to the housing 110, thereby significantly reducing the vertical vibration of the housing 110 caused by the rotational torque.

[0466] As described above, specific embodiments of the present invention have been illustrated and described. However, the present invention can be implemented in various forms without departing from its spirit or essential characteristics. Therefore, the embodiments described above should not be construed as being limited by the specific content for implementing the invention.

[0467] Moreover, even if the embodiments are not listed one by one in the detailed description described above, they should be broadly interpreted within the scope of the technical idea defined in the appended claims. In addition, all changes and modifications included within the technical scope of the claims and their equivalents should be covered by the appended claims.

Claims

1. A compressor, wherein, comprising: a housing; a compression unit having a cylinder defining a compression space for refrigerant, a piston reciprocably disposed inside the cylinder, and a driving portion for reciprocating the piston axially; a support unit elastically supporting the compression unit to be spaced apart from the inner surface of the housing; and a suction cover provided at a rear end of the compression unit to form a suction flow path for the refrigerant, the support unit having a wire spring having a plurality of straight portions arranged in parallel with each other and curved portions connecting two adjacent straight portions, the wire spring having a first wire spring and a second wire spring arranged symmetrically with each other, one end of each of the first wire spring and the second wire spring being respectively connected to the compression unit, the wire spring having a connecting portion connecting the other ends of the first wire spring and the second wire spring and supported by the housing, a plurality of coupling studs are provided at a rear end of the compression unit to connect one end of each of the first wire spring and the second wire spring, the suction cover having a plurality of coupling stud blocking portions surrounding the first wire spring, the second wire spring, and the coupling studs together, the first wire spring and the second wire spring are fixed to the rear end of the compression unit by fixing members passing through the plurality of coupling stud blocking portions and fastened to the plurality of coupling studs.

2. The compressor according to claim 1, wherein, coupling rings are respectively provided at one end portions of the first wire spring and the second wire spring to be coupled to the peripheries of the coupling studs, a vibration insulating member for suppressing transmission of vibration of the coupling studs to the coupling rings is provided between the coupling studs and the coupling rings.

3. The compressor according to claim 1, wherein, a suction pipe for sucking refrigerant is connected to the housing, the suction pipe is connected to the circumferential surface of the housing.

4. The compressor according to any one of claims 1 to 3, wherein, the support unit includes: a front support unit provided at a front end of the compression unit; and a rear support unit provided at a rear end of the compression unit, the rear support unit having the wire spring, the front support unit respectively having a pair of front springs which respectively extend obliquely downward outward from the front end of the compression unit and are capable of telescoping.

5. The compressor according to claim 4, wherein, a fixing bracket for fixing the connecting portion of the wire spring is provided at an upper end of the inner surface of the housing.

6. The compressor according to claim 5, wherein, a vibration insulating member for suppressing vibration transmission is provided between the fixing bracket and the connecting portion.

7. The compressor according to claim 6, wherein, the fixing bracket is formed to enable the vibration insulating member to be slidably inserted.

8. The compressor according to claim 7, wherein, a biting portion is provided at a contact area between the fixing bracket and the vibration insulating member, and the biting portion is bitten after the vibration insulating member and the fixing bracket are combined to inhibit movement.

9. The compressor according to claim 8, wherein, the engaging portion has a protrusion protruding from one of the mutual contact surfaces of the vibration insulating member and the fixed bracket toward the other, and a protrusion receiving portion formed in the other in a manner capable of receiving the protrusion.

10. The compressor according to any one of claims 1 to 3, wherein, the support unit includes: a front support unit provided at a front end of the compression unit; and a rear support unit provided at a rear end of the compression unit, the front support unit and the rear support unit each have the wire spring, the wire springs of the front support unit and the wire springs of the rear support unit are fixed at positions spaced apart from each other in the circumferential direction of the housing.

11. The compressor according to claim 10, wherein, the wire springs of the front support unit and the wire springs of the rear support unit are respectively fixed at positions spaced 180 degrees apart in the circumferential direction of the housing.

12. The compressor according to any one of claims 1 to 3, wherein, the respective straight portions of the first wire spring and the second wire spring each include a first straight portion having a first length, a second straight portion having a second length smaller than the first length, a third straight portion having the first length or the second length, and a fourth straight portion having the second length, the second straight portion and the third straight portion are respectively arranged in parallel on both sides of the first straight portion, and the fourth straight portion is arranged in parallel on one side of the third straight portion, the respective curved portions of the first wire spring and the second wire spring each have a first curved portion connecting the first straight portion and the second straight portion, a second curved portion connecting the first straight portion and the third straight portion, and a third curved portion connecting the third straight portion and the fourth straight portion.

13. The compressor according to claim 12, wherein, a coupling ring coupled to the compression unit is provided on the second straight portion, the fourth straight portions of the first wire spring and the second wire spring are connected by the connecting portion.

14. The compressor according to claim 13, wherein, the respective coupling rings of the first wire spring and the second wire spring are respectively arranged above the connecting portion, the connecting portion includes an arc section having a radius of curvature corresponding to the inner surface of the housing and bent sections bent from both ends of the arc section and respectively connected to the fourth straight portions of the first wire spring and the second wire spring.

15. The compressor according to claim 14, wherein, the respective straight portions of the first wire spring and the second wire spring are respectively arranged to be inclined outward or inward with respect to the center line passing through the center of the housing.

16. The compressor according to any one of claims 1 to 3, wherein, the connecting portion has a rotation inhibiting section protruding longitudinally in the length direction and inhibiting rotation, the rotation inhibiting section is coupled to be supported by the housing.

17. The compressor according to claim 16, wherein, A fixed bracket for supporting the rotation suppression section is provided on the housing. A vibration insulating member for suppressing the transmission of vibrations in the rotation suppression section to the fixed bracket is provided between the rotation suppression section and the fixed bracket.

18. The compressor according to any one of claims 1 to 3, wherein the drive unit has a stator and a rotor connected to the piston and reciprocating axially with respect to the stator.

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