COMPRESSOR

Abstract

Compressor comprising: a housing (110) defining an external appearance; a compressor body (C) arranged such that it is spaced apart from a cap mounting surface (111a) formed on a bottom surface of the housing (110) and includes a motor unit (120) and a compression unit (130); at least one support spring (151) arranged between the cap mounting surface (111a) of the housing (110) and a bottom surface of the compressor body (C) facing the cap mounting surface (111a) of the housing (110) in an axial direction of the compressor and elastically supporting the compressor body (C) with respect to the cap mounting surface (111a) of the housing (110); and at least one first spring cap (152) attached to the cap mounting surface (111a) of the housing (110), and at least one second spring cap (153) attached to the compressor body (C), such thatthat both ends of the support spring (151) are each supported by one of the first and second spring caps (152, 153), wherein the support spring (151) is arranged such that it is inclined with respect to the axial direction of the compressor, wherein the first and second spring cap (152, 153) each comprise: a spring support section (1521, 1531) which is attached to the cap mounting surface (111a) of the housing (110) or the compressor body (C) to support one end of the support spring (151); and a spring insertion section (1522, 1532) extending from the spring carrier section (1521, 1531) such that it is inserted into an end of the support spring (151), wherein a center line (CL2) passing through a center of the spring insertion section (1522, 1532) is inclined with respect to the cap mounting surface (111a) of the housing (110) and is inclined in the axial direction with respect to a center line (CL) of the compressor, wherein the spring carrier section (1521,1531) has a spring carrier surface (1521d, 1531d) on which the spring insertion section (1522, 1532) is arranged, and the spring carrier surface (1521d, 1531d) is inclined with respect to the cap mounting surface (111a) of the housing (110), wherein the first spring cap (152) is provided with at least one cap fastening projection (1521c) formed on its surface facing the cap mounting surface (111a) of the housing (110), the cap mounting surface (111a) of the housing (110) is provided with a cap fastening groove (111c) into which the cap fastening projection (1521c) is inserted, and the cap fastening projection (1521c) is elongated perpendicular to a direction in which a support spring (151) is inclined.

Description

TECHNICAL AREA

[0001] The present disclosure relates to a compressor, in particular a hermetic compressor, wherein a compressor body is elastically supported in a housing. BACKGROUND

[0002] The compressor in question is a compressor in which both a motor unit and a compression unit, defining a compressor body, are installed within the interior of a housing. Such a compressor can be classified according to a method for supporting the compressor body in relation to a housing into a rigid support method and a flexible support method.

[0003] In the rigid support method, a compressor body is brought into partial or complete close contact with an inner surface of a housing. In the elastic support method, a compressor body is elastically supported with respect to an inner circumferential surface of a housing.

[0004] A piston compressor is a type of elastic support device that generally uses a compression spring to elastically support the lower end of a compressor body against the bottom surface of a casing. Such a piston compressor can be classified, according to a method for operating a piston, as either a linkage-type or a vibration-type piston compressor.

[0005] With regard to a piston compressor of the connection type (Patent Document 1: Korean Patent Publication No. 10-2013-0120023), a piston is connected to a rotary motor via a rotating shaft, and a connecting rod performs a reciprocating motion in a cylinder. In a piston compressor of the vibration type (Patent Document 2: Korean Patent Publication No. 10-2016-0132665), a piston connected to a rotator of a piston motor performs a reciprocating motion in a cylinder.

[0006] In both the linkage-type and oscillating-type piston compressors, a transverse vibration is generated as the piston moves back and forth relative to the cylinder. Therefore, a support spring, configured as a compression helical spring, is conventionally used to support a compressor body against an inner surface of a housing.

[0007] However, in a conventional piston compressor, because the compressor body, installed in the housing, is supported longitudinally by a spring configured as a compression spring, it is not adequately supported laterally. For example, during stopping, starting, inclined operation, or transport of the compressor, the compressor body can be subjected to significant lateral vibration within the housing. This can cause increased vibration noise or even collisions between the compressor body and the housing, thereby reducing the reliability of the compressor body.

[0008] In a piston compressor disclosed in the prior art (Patent Document 3: US Patent No. 2016 / 0195080 A1), a compressor body is mechanically supported on a housing by installing a damping element between an inner circumferential surface and the compressor body, in addition to a support spring, to prevent a collision between the compressor body and the housing. However, this can increase the number of parts and labor hours, thereby increasing the manufacturing cost of the compressor and the compressor size due to a larger compressor body containing the support elements. Furthermore, even when the damping element (or stop element) is installed, it cannot be fully secured without some gap (or clearance), causing a collision between the compressor body and the damping element (or stop element).This collision force is transmitted to the housing via the damping element (or stop element), causing vibration noise from the compressor. Therefore, the damping element (or stop element) is not necessarily a fundamental solution for preventing a collision between the compressor body and the housing.

[0009] Furthermore, if the size of a housing is reduced to accommodate a smaller processing compressor, the gap or interval between the housing and the compressor body may be further reduced, potentially leading to frequent collisions between them. For this reason, the demand for a damping element (or stop element) may increase; however, the damping element (or stop element) is not necessarily required to effectively prevent collisions between the compressor body and the housing. SUMMARY

[0010] One object of the present disclosure is to provide a compressor, in particular a hermetic compressor, which can reduce a transverse amplitude of a compressor body that is elastically supported on a housing.

[0011] Another objective of the present disclosure is to create a compressor, in particular a hermetic compressor, which can reduce a transverse amplitude of a compressor body itself without installing an additional damping element (or stop element) between a housing and the compressor body.

[0012] Another objective of the present disclosure is to provide a compressor, in particular a hermetic compressor, which can reduce a transverse amplitude by increasing a transverse stiffness of a support element that elastically supports a compressor body and can suppress a collision between a housing and the compressor body without installing an additional damping element (or stop element).

[0013] Another objective of the present disclosure is to create a compressor, in particular a hermetic compressor, which can reduce a transverse amplitude of a compressor body that is elastically supported on a housing, while achieving a load-bearing stability of a support element.

[0014] Another object of the present disclosure is to provide a compressor, in particular a hermetic compressor, which can enable a support element to be securely supported by forming a cross-section of a spring supporting a compressor body and a cross-section of a spring cap facing the cross-section of the spring, or an inner circumferential surface of a housing towards which the spring cap is directed, or an underside of the compressor body perpendicular to a longitudinal direction of the support element.

[0015] Another objective of the present disclosure is to provide a compressor, in particular a hermetic compressor, which can securely support a compressor body by preventing one end of a spring supporting the compressor body from being pressed.

[0016] Another objective of the present disclosure is to provide a compressor, in particular a hermetic compressor, which can reliably maintain a distance between a spring cap provided at one end of a spring supporting a compressor body and another spring cap located adjacent thereto.

[0017] Another objective of the present disclosure is to create a compressor, in particular a hermetic compressor, which can enable a compressor body to be elastically supported on a housing while reducing the size of the housing.

[0018] Another objective of the present disclosure is to create a compressor, in particular a hermetic compressor, which can achieve a small housing by reducing a gap or interval between a compressor body and a housing, without installing an additional damping element (or stop element) between the housing and the compressor body.

[0019] Another objective of the present disclosure is to create a compressor, in particular a hermetic compressor, which can reduce a transverse amplitude of a compressor body using an existing part (or component) without installing an additional damping element (or stop element) between a housing and the compressor body, thereby reducing the manufacturing costs of a compressor and achieving a small housing.

[0020] These tasks are solved by the features of the independent claim.

[0021] According to one aspect of the subject matter described in this application, a compressor, particularly a hermetic compressor, incorporates several support springs that downwards support a compressor body and are installed at an angle. This allows the longitudinal stiffness of the support springs to be transferred to a transverse stiffness, thereby reducing transverse displacement of the support springs. Since the transverse amplitude itself is reduced, no damping element (or stop element) is required between a housing and a compressor body. This can result in reduced manufacturing costs and the achievement of a smaller housing.

[0022] Implementations according to this aspect or other aspects of the present disclosure may include one or more of the following features: For example, several primary spring caps installed on the bottom surface of a housing, several secondary spring caps installed on the underside of a compressor body facing the bottom surface of the housing, and several support springs whose ends are coupled to the multiple primary and secondary spring caps may be provided. The intervals between the primary spring caps may be larger than the intervals between the secondary spring caps. Similarly, the intervals between the support springs may increase towards their lower ends to ensure secure support of the compressor body.

[0023] In some implementations, multiple support springs, which support a compressor body downwards and are arranged at an inclination, and multiple spring caps, which are inserted into both ends of the multiple support springs, may be provided. A cap mounting projection or cap mounting groove may be formed between the multiple spring caps and an element to which the spring caps are attached. The cap mounting projection or cap mounting groove may be elongated in a direction perpendicular to an inclined direction of the support spring. Accordingly, axial and radial directions of the support springs can be securely supported when the support springs are arranged at an inclination. In the present disclosure, the axial direction may be an axial direction of the compressor or the motor unit.That is, the axial direction can refer to the vertical direction when the compressor is mounted, or to a direction parallel to an axis of rotation of the engine, e.g. parallel to an expansion direction of a crankshaft of the engine.

[0024] In some implementations, multiple springs can be fitted with multiple first spring caps and multiple second spring caps at both ends. The first spring caps and / or the second spring caps can be connected to each other. This simplifies the assembly of the multiple spring caps while allowing them to be attached more securely.

[0025] According to another aspect, a compressor, in particular a hermetic compressor, comprises the following: a housing that defines an external appearance; a compressor body, positioned such that it is spaced from an inner surface of the housing and containing a motor unit and a compression unit; several support springs arranged between the housing and the compressor body, elastically supporting the compressor body with respect to the housing; and several spring caps attached to the inner surface of the housing and the compressor body, i.e., each facing the inner surface of the housing, to support both ends of each of the several support springs. Each of the several support springs may be arranged such that it is inclined with respect to an axial direction. This may allow longitudinal stiffness of the support springs to be transferred to transverse stiffness, thereby increasing a transverse force of the support springs.This allows movement or shaking of the compressor body during stopping / starting or transport of the compressor to be suppressed or reduced.

[0026] Implementations according to this aspect or other aspects of the present disclosure may include one or more of the following features: Each of the multiple support springs can be arranged such that it is inclined with respect to an axial direction of the motor or compressor. That is, the support springs can be arranged such that they are inclined with respect to a plane defined by the spring caps attached to the inner surface of the housing. The support springs can be inclined with respect to the axial direction such that one end of each support spring, supported by the spring caps attached to the compressor body, points towards a centerline of the compressor (i.e., a centerline parallel to the axial direction), while one end of each support spring, supported by the spring caps attached to the inner surface of the housing, points away from the centerline of the compressor.

[0027] For example, each spring cap can include a spring carrier section attached to the inner surface of the housing or compressor body to support one end of a spring. Each spring cap can include a spring insertion section extending from the spring carrier section to accommodate a spring. The spring insertion section can be rod-shaped, conical, or truncated pyramidal. The spring carrier section can be wedge-shaped, preferably with a circular cross-section. A second centerline passing through the center of the spring insertion section can be inclined relative to a first centerline passing through the center of the spring carrier section. The second centerline can be longitudinal or axial to the spring insertion section.The first centerline can be defined with respect to a surface of the spring support section facing the inner surface of the housing or the compressor body. Accordingly, the support springs can be arranged at an angle without causing deformation (or twisting) of the support springs, thereby increasing their load-bearing stability. Furthermore, interference with the spring insertion sections can be prevented when the support springs are compressed and extended (or released), thus improving reliability.

[0028] In some implementations, each spring cap may contain a spring support section that is attached to the inner surface of the housing or to the compressor body to support one end of a support spring. Each spring support section may have a spring support surface with which a cross-section of a support spring is in contact. The spring support surface may be inclined with respect to the axial direction.

[0029] In some implementations, the spring support surface can be perpendicular to a longitudinal centerline of the spring insertion section. This can allow the support springs to be gently compressed and extended, thus effectively absorbing vibrations of the compressor body.

[0030] In some implementations, each of the spring caps attached to the inner surface of the housing may be provided with at least one cap mounting projection formed on a surface opposite the spring carrier surface. The inner surface of the housing may be provided with a cap mounting groove into which the cap mounting projection is inserted. Accordingly, the springs can be securely fastened while arranged at an angle.

[0031] In some implementations, all cap mounting projections and cap mounting grooves can be perpendicular to the direction in which a support spring is inclined. Accordingly, the support surface can be raised with respect to the direction in which the resulting force acts from one end of the support spring, thus ensuring that support springs arranged in the inclined manner can be securely supported.

[0032] In some implementations, the cap mounting projections and cap mounting grooves can each be arranged radially or circumferentially with respect to a center point of the compressor body. Accordingly, the compressor body can be securely supported in all directions.

[0033] In some implementations, the cap mounting protrusions and cap mounting grooves can be arranged parallel to each other. This can facilitate inclined installation of the support springs while effectively suppressing rotation of the compressor body.

[0034] In some implementations, each of the multiple spring caps attached to the compressor body can be provided with a cap carrier projection formed on a cap mounting surface that defines an opposite surface of the spring carrier surface, in order to cover a side edge of the compressor body. Accordingly, the spring caps attached to the compressor body can be securely held in place.

[0035] In some implementations, the cap carrier projection may be formed at an edge of the cap mounting surface and may include a countersunk screw insertion groove to allow a stator mounting screw to be inserted to secure the motor unit to the compression unit. This allows for easy attachment of the spring caps to the compressor body.

[0036] In some implementations, the multiple support springs can be arranged along the circumference of the compressor body such that they are spaced apart by predefined intervals. The multiple support springs can also be arranged symmetrically with respect to a center point of the compressor body. This can allow for a more effective reduction of the compressor body's transverse amplitude.

[0037] In some implementations, the intervals between the multiple support springs to the housing can increase. This can allow the lateral load-bearing capacity of the multiple springs to be further increased.

[0038] In some implementations, a first mounting point can be radially eccentric with respect to a second mounting point, where one point of each of the spring caps attached to the inner surface of the housing is designated as the first mounting point, and one point of each of the spring caps attached to the compressor body is designated as the second mounting point. Accordingly, intervals between the support springs can increase in a downward direction. This allows the transverse load-bearing capacity of the multiple springs to be increased while preventing a decrease in their longitudinal load-bearing capacity.

[0039] In some implementations, a first distance may be greater than a second distance, where a radial distance from an axial centerline of the compressor body to the first mounting point is designated as the first distance and a radial distance from the axial centerline of the compressor body to the second mounting point is designated as the second distance.

[0040] In some implementations, the multiple support springs can be arranged along a circumference of the compressor body such that they are spaced apart by predefined intervals. The multiple support springs can be arranged so that they are symmetrical to each other with respect to a transverse or radial centerline, or an axial centerline of the compressor body. This can simplify an inclined arrangement of the multiple support springs while effectively reducing the transverse amplitude of the compressor body.

[0041] The compressor according to an embodiment described herein can be a piston compressor and / or a hermetic compressor. The compressor according to an embodiment described herein can be a compressor for a household appliance, a heat pump system, a refrigeration device, or an air conditioning system. The motor can be a rotary motor.

[0042] According to another aspect, a compressor, in particular a hermetic compressor, comprises the following: a housing that defines an external appearance; a compressor body arranged such that it is spaced from an inner surface of the housing and includes a motor unit and a compression unit; several support springs arranged between the housing and the compressor body, elastically supporting the compressor body with respect to the housing; and several spring caps, each attached to the inner surface of the housing and to the compressor body facing the inner surface of the housing, to support both ends of each of the several support springs. Each spring support cap may have a spring carrier surface with which a cross-section of a support spring is in contact, and each spring carrier surface may be inclined with respect to an axial direction, e.g., an axial direction of the compressor or the motor unit.Accordingly, an inclined arrangement of the multiple support springs can be simplified by using a specific shape for the spring caps.

[0043] Implementations according to this aspect or other aspects of the present disclosure may include one or more of the following features: For example, each spring support surface can be designed such that the intervals between the multiple support springs increase in a downward direction. Accordingly, the multiple support springs can securely support the compressor body while being arranged at an angle.

[0044] In some implementations, the multiple spring caps can be configured as a first spring cap attached to the inner surface of the housing and a second spring cap attached to the compressor body. The first and / or second spring cap can each be provided multiple times, such that they are individually attached to the inner surface of the housing or the compressor body. This allows for increased design freedom for each spring cap and simplifies assembly, as the spring caps can be mounted individually or independently.

[0045] In some implementations, the multiple spring caps can be configured as multiple first spring caps attached to the inner surface of the housing and / or multiple second spring caps attached to the compressor body. At least one of the first spring caps and one of the second spring caps can be interconnected. Accordingly, the spring caps can be dependent on each other. Thus, the support springs can be arranged in an inclined manner while preventing any of the spring caps from separating or coming loose.

[0046] In some implementations, at least one of the first spring caps and one of the second spring caps can be connected to each other by cap connecting parts extending from them. List of characters Fig. Figure 1 is a transparent perspective view illustrating the casing of an example piston compressor; Fig. Figure 2 is a cross-sectional view showing the inside of the piston compressor. Fig. 1 illustrates; Fig. Figure 3 is a side view of a compressor body in Fig. 1 from a direction that intersects a direction of movement of a piston; Fig. Figure 4 is a front view of the compressor body in Fig. 1 from one direction of movement of a piston; Fig. Figure 5 is a top view of a base surface of a base housing to show an example of an arranged state of a cap fastening groove in Fig. 1; Fig. Figure 6 is a perspective view showing a composite state of a first spring cap in Fig. 1 illustrates; Fig. Figure 7 is a disassembled perspective view of the first spring cap in Fig. 6; Fig. 8 is a front view of the first spring cap in Fig. 6; Fig. Figure 9 is a perspective view showing a composite state of a second spring cap in Fig. 1 illustrates; Fig. Figure 10 is a disassembled perspective view of the second spring cap in Fig. 9; Fig. 11 is a front view of the second spring cap in Fig. 9; Fig. Figure 12 is a schematic view of a support part in Fig. 1. From a lateral direction (a side direction) to explain the effects of an amplitude reduction; Fig. Figure 13 is a perspective exploded view illustrating an example of a support part; Fig. 14A is a top view and Fig. 14B is a side view showing a first spring cap in each case Fig. 13 illustrate; Fig. 15A is a side view and Fig. 15B is a top view showing a second spring cap in each Fig. 13 illustrate; Fig. Figure 16 is a schematic view of the support part in Fig. 13. from a lateral direction (a side direction) to explain its effects; and Fig. Figure 17 is a top view of a base surface of a base housing to show an example of an arranged state of a cap fastening groove in Fig. 1. DETAILED DESCRIPTION

[0047] In the following, a hermetic compressor according to one or more implementations of the present disclosure is described in detail with reference to the accompanying drawings as an example of a compressor of the present disclosure. As described above, in the hermetic compressor, a motor unit and a compression unit, which form a compressor body, are installed in a housing. In such a hermetic compressor, a compressor body may be attached to the housing or elastically supported by a spring on the housing. The implementations disclosed herein will use the latter, i.e., an elastically supported hermetic compressor in which a compressor body is elastically supported by a spring on a housing, as an example. Such an elastically supported hermetic compressor can be classified into different types according to a compression method.In the implementations disclosed here, a piston compressor of the compound type is used as a representative example. However, it is not limited to this type, and the implementations disclosed here can also be applied to any hermetic compressor in which a compressor body is elastically supported on a housing.

[0048] Fig. Figure 1 is a transparent perspective view illustrating the housing of an example piston compressor. Fig. Figure 2 is a cross-sectional view showing the inside of the piston compressor. Fig. 1 illustrates, Fig. Figure 3 is a side view of a compressor body in Fig. 1 from a direction that intersects a direction of movement of a piston, and Fig. Figure 4 is a front view of the compressor body in Fig. 1 from one direction of movement of a piston.

[0049] As in Fig. 1 and Fig. As illustrated in Figure 2, a piston compressor comprises a housing 110, which defines an external appearance, a motor unit 120, which is arranged in an interior 110a of the housing 110 and provides a driving force, a compression unit 130, which compresses a refrigerant by taking the driving force from the motor unit 120, an intake and discharge part 140, which directs a refrigerant to a compression chamber V and discharges a compressed refrigerant, and a support part 150, which carries a compressor body C, which contains the motor unit 120 and the compression unit 130, in relation to the housing 110.

[0050] The interior 110a of the housing 110 is sealed to allow the motor unit 120 and the compression unit 130 to be accommodated within it. The housing 110 is made of an aluminum alloy (hereinafter referred to as "aluminium") which is lightweight and has high thermal conductivity, and comprises a base housing 111 and a cover housing 112.

[0051] The base housing 111 essentially has a hemispherical shape. An intake pipe 115, a discharge line 116, and a process line (not shown) are coupled to the base housing 111 in a penetrating manner. The intake pipe 115, the discharge line 116, and the process line (not shown) can be coupled to the base housing 111 by injection molding.

[0052] Additionally, a cap mounting surface (or cap bearing surface) 111a, on which a first spring cap 152, which will be described below, is arranged, can be formed on a bottom surface of the base housing 111 and a cap receiving groove 111b, which carries the first spring cap 152, can be provided on the cap mounting surface 111a.

[0053] The cap mounting surface 111a can be formed in a ring shape over the entire base surface of the base housing 111 or be designed to correspond to the number of first spring caps (or suspension springs) 152. In some implementations, the first spring cap 152 is arranged radially or circumferentially at four locations or points, and the cap mounting surface 111a can also be formed radially at four points on the base surface of the base housing 111.

[0054] The cap receiving groove 111b and a cap fastening groove 111c can be formed on the cap mounting surface 111a.

[0055] The cap receiving groove 111b can have a shape corresponding to the shape of the underside of the first spring cap 152, which will be described below. Specifically, a first cap mounting surface 1521a, which defines the underside of the first spring cap 152, can be provided with a first cap support projection 1521b that is convex towards the center. Correspondingly, the cap receiving groove 111b can have a shape that is concave towards the center to correspond to the first cap support projection 1521b.

[0056] The cap fastening groove 111c can have a shape corresponding to a cap fastening projection 1521c provided on the underside of the first spring cap 152, which will be described below. Specifically, the cap receiving groove 111b can be provided therein, with the cap fastening groove 111c being recessed such that it has an angular cross-sectional shape, such as a cuboid. Accordingly, a contact surface with the cap fastening projection 1521c, which will be described below, is increased to effectively prevent the first spring cap 152 from being pressed in a radial direction.

[0057] Although not illustrated in the drawings, the positions of the cap mounting projection and the cap mounting groove can be the opposite of the example described above. For example, the cap mounting projection can be formed on the cap mounting surface of the base housing, and the cap mounting groove facing the cap mounting projection can be formed on the cap mounting surface of the first spring cap.

[0058] The cover housing 112 essentially has a hemispherical shape similar to the base housing 111. The cover housing 112 is coupled to an upper section of the base housing 111 to define the interior 110a of the housing 110.

[0059] Additionally, the cover housing 112 and the base housing 111 can be joined by welding. However, the base housing 111 and the cover housing 112 can be joined by a screw if they are made of an aluminum material that is not suitable for welding.

[0060] Now a description of the motor unit 120 is given.

[0061] As in Fig. 1 and Fig. As illustrated in Figure 2, the motor unit 120 contains a stator 121 and a rotor 122.

[0062] The stator 121 is elastically supported in relation to the interior 110a of the housing 110, namely the bottom surface of the base housing 111, and the rotor 122 is rotatably installed in the stator 121.

[0063] In some implementations, the stator 121 contains a stator core 1211 and a stator coil 1212.

[0064] The stator core 1211 is made of a metallic material such as an electrical steel sheet and performs an electromagnetic interaction with the stator coil 1212 and the rotor 122, which is described below, by means of an electromagnetic force when a voltage is applied from outside to the motor unit 120.

[0065] Additionally, the stator core 1211 essentially has a rectangular cylindrical shape. For example, the inner circumferential surface of the stator core 1211 can be circular, and its outer circumferential surface can be rectangular. Screw holes (see Fig. 9) The four corners of the stator core 1211 are each formed by the four corners of the stator core 1211 to allow a stator mounting screw 1215 to pass through it in order to be attached to a cylinder block 131, which is described below. Accordingly, the stator core 1211 is attached to the underside of the cylinder block 131 by the stator mounting screw 1215.

[0066] Furthermore, a lower end of the stator core 1211 is supported by a support spring 151, which will be described below, with respect to a base surface of the housing 110 in such a way that the stator core 1211 is axially and radially spaced from an inner surface of the housing 110. This can prevent a vibration generated during operation from being transmitted directly to the housing 110.

[0067] The stator coil 1212 is wound in the stator core 1211. As described above, when an external voltage is applied, the stator coil 1212 generates an electromagnetic force to perform electromagnetic interaction with the stator core 1211 and the rotor 122. This enables the motor unit 120 to generate a driving force so that the compression unit 130 performs a reciprocating motion.

[0068] An insulator 1213 is arranged between the stator core 1211 and the stator coil 1212. This prevents direct contact between the stator core 1211 and the stator coil 1212, thus enabling electromagnetic interaction.

[0069] In some implantations, the rotor 122 contains a rotor core 1221 and magnets 1222.

[0070] The rotor core 1221 is made of a metallic material, such as an electrical steel plate, which is the same as that of the stator core 1211, and has a substantially cylindrical shape. A crankshaft 125, which will be described below, can be pressed into and coupled to a central section or part of the rotor core 1221.

[0071] The magnets 1222 can be configured as permanent magnets and inserted into the rotor core 1221 at equal intervals in one circumferential direction. When a voltage is applied, the rotor 122 is rotated by electromagnetic interaction with the stator core 1211 and the stator coil 1212. The crankshaft 125 then rotates together with the rotor 122, enabling a rotational force from the motor unit 120 to be transmitted to the compression unit 130 via a connecting rod 126.

[0072] The following describes the compression unit 130.

[0073] As in Fig. 1 and Fig. As illustrated in Figure 2, the compression unit 130 contains the cylinder block 131 and a piston 132. The cylinder block 131 is elastically supported on the housing 110 and the piston 132 is coupled to the crankshaft 125 by the connecting rod 126 to perform a relative movement with respect to the cylinder block 131.

[0074] In some implementations, the cylinder block 131 is provided at an upper section of the motor unit 120. The cylinder block 131 includes a frame 1311, a mounting projection 1312 coupled to the stator 121 of the motor unit 120, a shaft receiving section (or shaft receiving section) 1313 that supports the crankshaft 125, and a cylinder unit 1315 that defines a compression chamber V.

[0075] The frame 1311 can have a flat plate shape running in a transverse direction, or a radial plate shape by processing a section (or part) of an edge except corners to reduce weight or thickness.

[0076] The mounting projection 1312 is provided at an edge of the frame 1311. For example, the mounting projection 1312 can extend from the edge of the frame 1311 towards the motor unit 120, namely in a downward direction.

[0077] Additionally, a mounting hole (not shown) is formed in the mounting projection 1312 such that it communicates with the screw hole 1211a provided in the stator 121. Accordingly, the cylinder block 131 and the stator 121 can be coupled by the stator mounting screw 1215, which will be described below, in such a way that they are elastically supported on the base housing 111 together with the stator 121 of the motor unit 120.

[0078] The shaft receiving section 1313 can extend from a central section of the frame 1311 in both directions along an axial axis. A shaft receiving hole 1313a can be formed axially through the shaft receiving section 1313 to allow the crankshaft 125 to penetrate it, and a bushing housing can be coupled to an inner circumferential surface of the shaft receiving hole 1313a by insertion.

[0079] The cylinder unit (hereinafter referred to as "cylinder") 1315 is radially eccentric from an edge of the frame 1311. The cylinder 1315 radially penetrates the cylinder block 131 such that the piston 132, which is connected to the connecting rod 126, is inserted into its inner open end, and a valve assembly 141, which forms the intake and exhaust section 140, which will be described below, is inserted into its open outer end.

[0080] In some implementations, the piston 132 is designed such that one side facing the connecting rod 126 (a rear side) is open, while the opposite side, namely a front side, is closed. Accordingly, the connecting rod 126 is inserted into the rear side of the piston 132 in such a way that they are rotatably coupled, and the front side of the piston 132 is formed in a closed shape to define, together with the valve assembly 141, which will be described below, the compression chamber V in the cylinder 1315.

[0081] Additionally, the piston 132 can be made of the same material as the cylinder block 131, namely an aluminum alloy. This can prevent a magnetic flux from being transferred from the rotor 122 to the piston 132.

[0082] Furthermore, since the piston 132 is made of the same material as the cylinder block 131, the piston 132 and the cylinder block (more precisely, the cylinder) 131 can have the same coefficient of thermal expansion. Accordingly, even if the interior 110a of the housing 110 is at a high temperature (approximately 100 °C) during compressor operation, interference between the cylinder block 131 and the piston 132 caused by thermal expansion can be suppressed or reduced.

[0083] The following describes the intake and exhaust section 140.

[0084] As in Fig. 1 and Fig. As illustrated in Figure 2, the intake and exhaust section 140 includes the valve assembly 141, an intake silencer 142, and an exhaust silencer 143. The valve assembly 141 and the intake silencer 142 are sequentially coupled from the open outer end of the cylinder 1315.

[0085] In some implementations, the valve assembly 141 includes a suction valve 1411 and a discharge valve 1412, such that they are coupled to one end of the cylinder block 131. The suction valve 1411 and the discharge valve 1412 may be provided separately, but they can generally be provided together on the same valve plate.

[0086] The suction valve 1411 opens and closes in one direction relative to the piston 132, whereas the discharge valve 1412 opens and closes in one direction relative to the suction valve 1411. Accordingly, unlike the suction valve 1411, the discharge valve 1412 can be provided with a retainer (not shown) that limits the degree of opening of the discharge valve 1412.

[0087] Additionally, the valve arrangement 141 can further include a valve plate 1413, which carries the intake valve 1411, and a cylinder cover 1414, which is coupled to the valve plate 1413 and carries the intake silencer 142.

[0088] The valve plate 1413 and the cylinder cover 1414 can be coupled to the cylinder block 131 by a screw and a discharge chamber S can be formed in the cylinder cover 1414 such that it is connected to the discharge silencer 143, which is described below, via a loop line 118.

[0089] In some implementations, the intake silencer 142 transfers a refrigerant drawn in through the intake manifold 116 to a compression chamber V of the cylinder 1315. The intake silencer 142 can be rigidly coupled to an end face of the cylinder block 131 by the valve assembly 141 or by a clamp (not shown).

[0090] The intake silencer 142 is provided internally with an intake chamber section (without reference numeral). An inlet (or inlet) of the intake chamber section communicates with the intake manifold 115 in a direct or indirect manner, and an outlet (or outlet) of the intake chamber section communicates directly with a suction side of the valve assembly 141.

[0091] In some implementations, the exhaust silencer 143 can be installed separately from the cylinder block 131.

[0092] The discharge silencer 143 is provided internally with a discharge chamber section (without reference numeral). An inlet of the discharge chamber section is connected to a discharge side of the valve assembly 141 via the loop line 118, and an outlet of the discharge chamber section can be directly connected to the discharge line 116 via the loop line 118.

[0093] The following describes the carrier part 150.

[0094] As in Fig. 3 and Fig. As illustrated in Figure 4, the support parts 150 are located between a bottom surface of the motor unit 120 and a bottom surface of the base housing 111, which faces the bottom surface of the motor unit 120, generally supporting four corners of the motor unit 120 in relation to the housing 110.

[0095] In some implementations, each support part 150 contains the support spring 151, the first spring cap 152, and a second spring cap 153. In other words, each support part 150 defines a unitary support assembly formed from the support spring 151, the first spring cap 152, and the second spring cap 153, and the unitary support assemblies can be installed along a circumference of the compressor body C such that they are spaced apart by predetermined intervals or gaps.

[0096] For example, the uniform support arrangements can be provided at each of the four corners of the compressor body C such that they are arranged symmetrically with respect to a center point of the compressor body C. Additionally, the uniform support arrangements can be arranged such that a gap or interval between adjacent support arrangements (e.g., support springs) can increase towards the bottom surface of the housing. A pair of uniform support arrangements is described below as a representative example.

[0097] In some implementations, the support spring 151 can be configured as a compression helical spring. A lower end of the support spring 151 can be inserted and attached to the first spring cap 152, and an upper end of the support spring 151 can be inserted and attached to the second spring cap 153. Accordingly, the stator core 1211, which defines a part (or section) of the compressor body C, can be elastically supported on the housing 110 by the support spring 151.

[0098] In some implementations, the first spring cap 152 can be attached to the bottom surface of the base housing 111, and the second spring cap 153 can be attached to the underside of the motor unit 120 (more precisely, to a lower end of the stator mounting screw that penetrates the stator core).

[0099] The first spring cap 152 and the second spring cap 153 can be located on different axial lines. Specifically, if a point where the first spring cap 152 is attached to the cap mounting surface 111a of the base housing 111 is designated as a 'first attachment point P1' and a point where the second spring cap 153 is attached to a bottom surface of the compressor body C is designated as a 'second attachment point P2', then the first attachment point P1 can be radially eccentric with respect to the second attachment point P2.

[0100] Accordingly, the support springs 151 are arranged such that they are inclined with respect to the axial direction, such that a gap between adjacent support springs 151 and the cap mounting surface 111a, which is the bottom surface of the base housing 111, is increased or widened. For example, if a gap between the first mounting points P1 is designated as a 'first gap G1' and a gap between the second mounting points P2 is designated as a 'second gap G2', the first gap G1 can be larger (wider) than the second gap G2.

[0101] If a radial distance from an axial centerline CL passing through a center Oc of the compressor body C to one of the first mounting points P1 is referred to as a 'first distance LI', and a radial distance of the axial centerline CL to one of the second mounting points P2 is referred to as a 'second distance L2', the first distance L1 may be greater than the second distance L2.

[0102] As described above, if the first spring cap 152 and the second spring cap 153 are arranged on different axial lines, the second spring cap 153 can be located further out than the first spring cap 152 to support the compressor body C more securely. This is discussed again below.

[0103] Additionally, the first spring cap 152 and the second spring cap 153 can be made of a rubber material or can be formed by wrapping an outer circumferential surface of a metal material with a rubber or plastic material to improve installation rigidity and cushioning (protection).

[0104] For example, the first spring cap 152 may be made of a metal material, since it should be firmly supported by being inserted into the cap mounting groove 111c of the base housing 111, which is made of metal, whereas the second spring cap 153 may be made of a rubber or plastic material, since the second spring cap 153 is inserted into and attached to a screw head section 1215a of the stator mounting screw 1215, which projects axially from a bottom of the stator core 1211.

[0105] In the drawings, an unexplained reference numeral 1255 designates an oil supply line.

[0106] The piston compressor in the example described above can operate as follows.

[0107] Specifically, when power is applied to the motor unit 120, the rotor 122 rotates. As the rotor 122 rotates, the crankshaft 125, which is coupled to the rotor 122, also rotates, thereby transmitting a rotational force via the connecting rod 126 to the piston 132. The connecting rod 126 enables the piston 132 to perform a reciprocating motion in a forward and backward direction relative to the cylinder 1315.

[0108] For example, when the piston 132 moves backward from cylinder 1315, the volume of the compression chamber V increases. As the volume of the compression chamber V increases, a refrigerant filled into the intake silencer 142 passes through the intake valve 1412 of the valve assembly 141 and is then drawn into the compression chamber V of cylinder 1315.

[0109] Conversely, as piston 132 moves forward from cylinder 1315, the volume of the compression chamber V decreases. As the volume of the compression chamber V decreases, a refrigerant filled into the compression chamber V is compressed, passes through the discharge valve 1413 of the valve assembly 141, and is then discharged to the discharge silencer 143. This refrigerant is discharged via the discharge line 116 to a cooling circuit. This series of processes is repeated.

[0110] Due to the properties of the piston compressor, an eccentric section (not shown) of the crankshaft 125, the connecting rod 126, and the piston 132 are arranged such that they are eccentric in a compression direction (either a transverse or a radial direction), and thus the piston compressor has a mass that is eccentric in the compression direction of the piston. Accordingly, the compressor body C is set into vibration due to the eccentric mass of these elements when the crankshaft 125 rotates.

[0111] This vibration is transmitted via the support element 150 to the housing 110, thereby causing the compressor to vibrate. However, the vibration transmitted from the compressor body C to the housing 110 is dampened by the support spring 151, which forms the support element 150.

[0112] The performance of the support element 150 is related to the spring stiffness or strength of the support spring. For example, if the stiffness in a longitudinal direction of the support spring is high, the support spring will not effectively absorb vibrations transmitted from the compressor body to the housing. If the stiffness of the support spring is lower, the vibrations transmitted from the compressor body to the housing can be effectively absorbed by the support spring. In the following, a longitudinal direction is defined as an axial direction and a transverse direction as a radial direction; however, the longitudinal and transverse directions are used in combination with the axial and radial directions, respectively.

[0113] However, if the stiffness of the support spring is too low, the amount of lateral displacement of the compressor body (referred to below as the "lateral amplitude") increases. This can result in increased vibration noise of the compressor body or the possibility of collision between the compressor body and the housing. Vibration noise of the compressor body or collision between the compressor body and the housing can be more pronounced during stopping / restarting, inclined operation, or transport of the compressor. To prevent this, some implementations incorporate a spring cap and a stop bar designed to mechanically restrain the compressor body, thus preventing an excessive increase in the compressor body's lateral amplitude.

[0114] Fig. Figure 5 is a top view of a base surface of a base housing to show an example of an arranged state of a cap fastening groove in Fig. 1, Fig. Figure 6 is a perspective view showing a composite state of a first spring cap in Fig. 1 illustrates, Fig. Figure 7 is a disassembled perspective view of the first spring cap in Fig. 6 and Fig. 8 is a front view of the first spring cap in Fig. 6.

[0115] As in Fig. 5 to Fig. As illustrated in Figure 7, the first spring cap 152 can include a first spring carrier section 1521 and a first spring insertion section 1522. The first spring cap 152 can be attached to the cap mounting surface 111a of the base housing 111 by welding or the like. Accordingly, the first spring cap 152 can be made of a metal material.

[0116] The first spring carrier section 1521 can have a disc shape. An underside of the first spring carrier section 1521 can be mounted on the bottom surface of the base housing 111, namely the cap mounting surface 111a formed on the bottom surface of the base housing 111, by being brought into close contact with it.

[0117] The first cap carrier projection 1521b and the cap mounting projection 1521c can be provided at a central section of the first cap mounting surface 1521a, which is defined by the underside of the first spring carrier section 1521. For example, the cap receiving groove 111b and the cap mounting groove 111c can be formed on the cap mounting surface 111a of the base housing 111, the first cap carrier projection 1521b can project towards the cap receiving groove 111b, and the cap mounting projection 1521c can project towards the cap mounting groove 111c.

[0118] The first cap carrier projection 1521b can have a hemispherical shape that is convex to the central section of the first cap mounting surface 1521a. Accordingly, when the first spring cap 152 is mounted, the first cap carrier projection 1521b is inserted into the cap receiving groove 111b, which allows for quick alignment of the mounting position. Simultaneously, the first cap carrier projection 1521b, inserted into the cap receiving groove 111b, can be spot-welded to the base housing 111 to securely maintain the assembled state of the first spring cap 152.

[0119] Additionally, the cap mounting projection 1521c can extend radially from a circumference of the first cap support projection 1521b. The cap mounting projection 1521c can have a cuboid shape that extends lengthwise in the radial direction such that it corresponds to the cap mounting groove 111c of the base housing 111. Since the cap mounting projection 1521c is supported radially by being inserted into the cap mounting groove 111c, the support spring 151 can be arranged at an inclination. Accordingly, even if the cap mounting projection 1521c and the cap mounting groove 111c exert a resultant force acting in the axial and radial directions, this force can be easily suppressed or balanced. Thus, the compressor body C can be securely supported.

[0120] Furthermore, the cap mounting projections 1521c can be arranged radially from the center Oc of the compressor body C (or a center of four cap mounting surfaces), as shown in Fig. Figure 5 illustrates this. For example, the cap mounting projection 1521c can be formed on both sides of the first cap support projection 1521b, and the two cap mounting projections 1521c can be elongated in a direction perpendicular to an inclined direction of the support spring 151. In other words, a virtual line passing through the two cap mounting projections 1521c is called a 'first virtual line VL1', and a virtual line passing through the center Oc of the compressor body C at a center between the two cap mounting projections 1521c is called a 'second virtual line VL2', the second virtual line VL2 being able to be formed in a direction perpendicular to the first virtual line VL1.

[0121] Accordingly, vibrations of the compressor body C are distributed evenly to the cap mounting projections 1521c, thereby ensuring the secure support of the compressor body C. Since the cap mounting projections 1521c are located at the four corners of the compressor body C, the compressor body C can be supported in all directions, thus guaranteeing its secure support.

[0122] With reference to Fig. 6 to Fig. 8. A first spring support surface 1521d, with which the lower end of the support spring 151 is in close contact, can be formed on a top surface of the first spring support section 1521. The first spring support surface 1521d can be formed in an annular shape along a circumference of the first spring insertion section 1522, which will be described below.

[0123] Additionally, the outer diameter of the first spring support section 1521, namely the outer diameter of the first spring support surface 1521d, can be greater than or equal to the outer diameter of the support spring 151. Accordingly, the lower end of the support spring 151 can be axially supported by being in close contact with the upper surface of the first spring support section 1521, namely the first spring support surface 1521d.

[0124] Here, the first spring support surface 1521d can be formed as an inclined surface inclined with respect to the cap mounting surface 111a of the base housing 111, i.e., an inclined surface inclined by a predetermined angle of inclination with respect to the axial direction (hereinafter referred to as the "first support surface inclination angle") α1. Accordingly, the support spring 151 can be arranged such that it is inclined with respect to the cap mounting surface 111a by the first support surface inclination angle α1, and the first spring support surface 1521d can support the lower end of the support spring 151 axially and radially.

[0125] More specifically, the height of the first spring support surface 1521d can gradually decrease towards the center Oc of the compressor body C. That is, the thickness of the first spring support section 1521 can vary in one circumferential direction, being lowest in the direction towards the center Oc of the compressor body C and highest in the opposite direction. Accordingly, the lower end of the support spring 151, which is in close contact with the first spring support surface 1521d, can be attached by being inclined at a predetermined angle towards the center Oc of the compressor body C. Thus, the lower end of each support spring 151 can be uniformly supported on the first spring support surface 1521d of one of the first spring caps 152, while the support springs 151 are allowed to be arranged at an inclination.

[0126] Meanwhile, with reference to Fig. 8 The first spring insertion section 1522 extends from the upper surface of the spring carrier section 1521, namely a central section of the first spring carrier surface 1521d, to a second spring insertion section 1532, which is described below. The first spring insertion section 1522 can have a cylindrical shape, in particular a frustoconical shape, which is narrower towards the upper surface.

[0127] Additionally, the first spring insertion section 1522 can be inclined towards the center Oc of the compressor body C. For example, if a virtual line passing through a center of the first spring support section 1521 is designated as a 'first centerline CL1', and a virtual line passing through a center of the first spring insertion section 1522 is designated as a 'second centerline CL2', the first centerline CL1 can be inclined with respect to the second centerline CL2 by a predetermined inclination angle (hereinafter referred to as the 'first insertion section inclination angle') β1.

[0128] Here, the first insertion section inclination angle β1, at which the first spring insertion section 1522 is inclined with respect to the axial direction (the longitudinal direction), is essentially the same as the first support surface inclination angle α1, by which the first spring support surface 1521d is inclined with respect to the radial direction (the transverse direction). In other words, the first spring insertion section 1522 can be perpendicular to the first spring support surface 1521d. Accordingly, the lower end of the support spring 151 can be inserted into the second spring insertion section 1522 at an inclination without causing deformation (or rotation) of the support spring 151.

[0129] Since the support spring 151 supports the compressor body C radially and axially while being inclined towards the second spring support surface 1521d, the load-bearing stability of the support spring 151 can be increased. Furthermore, the support spring 151 can be arranged at an inclination without interfering with the spring insertion section 1522 when the support spring 151 is extended or compressed, thus improving the reliability of the compressor.

[0130] The second spring cap 153 is described below.

[0131] Fig. Figure 9 is a perspective view showing a composite state of a second spring cap in Fig. 1 illustrates, Fig. Figure 10 is a disassembled perspective view of the second spring cap in Fig. 9 and Fig. 11 is a front view of the second spring cap in Fig. 9.

[0132] As in Fig. 9 to Fig. As illustrated in Figure 11, the second spring cap 153 can have a shape similar to the reverse of the first spring cap 152.

[0133] For example, the second spring cap 153 can contain a second spring carrier section 1531 and the second spring insertion section 1532. The second spring cap 153 can be made of an elastic material such as rubber or plastic.

[0134] The second spring support section 1531 can have a disc shape. A top surface of the second spring support section 1531, i.e., a second cap mounting surface 1531a, can be attached to the compressor body C by being brought into close contact with the underside of the stator core 1211, which defines the bottom of the compressor body C.

[0135] In the second spring carrier section 1531, a screw insertion groove 1531b can be formed at a central section of the second cap mounting surface 1531a. An inner circumferential surface of the screw insertion groove 1531b can have an angled shape to correspond to an outer circumferential surface of the screw head section 1215a. Accordingly, the second spring cap 153 can be inserted into and coupled to the screw head section 1215a of the stator mounting screw 1215, which penetrates the stator core 1211.

[0136] Additionally, the second spring carrier section 1531 can be provided with a second cap carrier projection 1531c, which is formed at an edge of the second cap mounting surface 1531a along an edge of the second spring carrier section 1531. The second cap carrier projection 1531c can be provided only on a section of the edge of the second cap mounting surface 1531a that corresponds to an edge of the stator core 1211. Accordingly, the second cap carrier projection 1531c can be formed in an arcuate shape that projects axially such that it is secured by covering the edge of the stator core 1211.

[0137] A second spring carrier surface 1531d can be formed on the underside of the second spring carrier section 1531. Similar to the first spring carrier surface 1521d, the second spring carrier surface 1531d can be formed in a ring shape along a circumference of the second spring insertion section 1532, which will be described below.

[0138] The outer diameter of the second spring carrier section 1531 can be greater than or equal to the outer diameter of the support spring 151. Accordingly, the upper end of the support spring 151, which is inserted from the outside into the second spring insertion section 1532, which is described below, can be brought into close contact with the second spring carrier surface 1531d, which is formed on the underside of the second spring carrier section 1531, in order to be fastened.

[0139] The second spring support surface 1531d can be symmetrical to the first spring support surface 1521d. For example, the second spring support surface 1531d can be formed as an inclined surface inclined at a predetermined angle of inclination α2 (hereinafter referred to as the "second support surface inclination angle") with respect to the underside of the stator core 1211. The second support surface inclination angle α2 of the second spring support surface 1531d and the first support surface inclination angle α1 of the first spring support surface 1521d can be identical in opposite directions.

[0140] Specifically, the height of the second spring support surface 1531d can increase towards the center Oc of the compressor body C. That is, the thickness of the second spring support section 1531 can vary along the circumferential direction, being greatest in the direction towards the center Oc of the compressor body C and lowest in the opposite direction.

[0141] Accordingly, the upper end of the support spring 151, which is in close contact with the second spring support surface 1531d, can be attached by being inclined towards the Oc of the compressor body C with respect to the underside of the stator core 1211 by the second support surface inclination angle α2. Thus, the upper end of each support spring 151 can be uniformly supported on the second spring support surface 1531d of one of the second spring caps 153, while allowing the support springs 151 to be arranged in an inclined manner.

[0142] With reference to Fig. 11 the second spring insertion section 1532 can be symmetrical to the first spring insertion section 1522.

[0143] For example, the second spring insertion section 1532 can extend from the second spring carrier section 1531, namely a middle section of the second spring carrier surface 1531d, to the first insertion section 1522. The second spring insertion section 1532 can have a cylindrical shape, in particular a truncated cone shape, which narrows towards the top.

[0144] Additionally, the second spring insertion section 1532 can be inclined in a direction away from the center Oc of the compressor body C. An inclination angle β2 at which the second spring insertion section 1532 is inclined with respect to the axial direction (the longitudinal direction) (hereinafter referred to as the "second insertion section inclination angle") is essentially the same as the second support surface inclination angle α2 at which the second spring support surface 1531d is inclined with respect to the radial direction (the transverse direction). In other words, the second spring insertion section 1532 can be formed such that a second centerline CL2, passing through a center of the second spring insertion section 1532, is inclined with respect to a first centerline CL1, passing through a center of the second spring support section 1531, by the second insertion section inclination angle β2.

[0145] Accordingly, the second spring insertion section 1532 can be perpendicular to the second spring support surface 1531d, which is inclined by the second support surface inclination angle α2, allowing the lower end of the suspension spring 151 to be inserted into the second spring insertion section 1532 in an inclined state.

[0146] The support spring 151 then supports the compressor body C radially and axially in a state where the support spring 151 is inclined outwards towards the underside of the second spring support surface 1531d. This increases the load-bearing stability of the support spring 151. Additionally, the support spring 151 can be arranged at an inclination without interfering with the spring insertion section 1532 when the support spring 151 is extended and compressed, thus increasing the reliability of the compressor.

[0147] Since the multiple support springs 151, configured as compression helical springs, are arranged at an inclination, a longitudinal stiffness (hereinafter referred to as "longitudinal stiffness") of the support spring 151 can be transferred to a transverse stiffness (hereinafter referred to as "transverse stiffness"). This enhances the radial support of the compressor body C, effectively suppressing transverse vibrations of the compressor body C generated during stopping / starting, inclined operation, or transport of the compressor.

[0148] Fig. Figure 12 is a schematic view of a support part in Fig. 1 from a lateral direction (a side direction) to explain the effects of an amplitude reduction.

[0149] With reference to Fig. 12, since each of the several support springs 151 that supports the compressor body C is inclined at a predetermined angle, a transverse stiffness can be added in order to increase the stiffness of the support springs 151.

[0150] For example, if the compressor body C oscillates in the transverse direction, i.e., in the direction of the arrow in the drawing, a transverse stiffness Kx' is provided in the support spring 151 in addition to the longitudinal stiffness Kz'. That is, a component force of the longitudinal stiffness Kz' is transferred to the transverse stiffness Kx' in order to generate a spring stiffness K' that corresponds to a resultant force of the longitudinal stiffness Kz' and the transverse stiffness Kx'. This can be applied equally if the compressor body C oscillates in a transverse direction opposite to the direction of the arrow in the drawing.

[0151] Then, even if the compressor body C oscillates laterally, the lateral amplitude of the compressor body C can be effectively limited or restricted due to the increased lateral stiffness of the support spring 151. Since the cylinder cover 1414 is located further away from the center Oc of the compressor body C relative to other elements, the cylinder cover 1414 is very likely to collide with the inner surface of the housing 110 if lateral vibration of the compressor body C is increased, e.g., during a stop / restart, inclined operation, or transport of the compressor.

[0152] However, since the lateral stiffness of the support spring 151, which supports the compressor body C, is provided, the possibility of collision with the cylinder cover 1414, which defines a section of the compressor body C, can be reduced. Or, even if a collision occurs, its impact force can be reduced. Accordingly, vibration noise of the compressor body C can be reduced, while damage caused by a collision between the compressor body C and the housing 110 is prevented. This can increase the reliability of the compressor. Furthermore, since the amplitude of the compressor body C is dampened using the support spring 151, which supports the compressor body C with respect to the housing 110, vibration of the compressor can be reduced without an additional part (an additional component), thereby reducing the manufacturing costs of the compressor.

[0153] The following is a description of another example of a support component.

[0154] That is, in the example described above, several first spring caps and several second spring caps are provided individually or separately, but in some cases the several first spring caps and the several second spring caps may be connected to each other.

[0155] Fig. Figure 13 is a perspective exploded view illustrating an example of a support component. Fig. 14A is a top view and Fig. 14B is a side view showing a first spring cap in each case Fig. 13 illustrate, and Fig. 15A is a side view and Fig. 15B is a top view showing a second spring cap in each Fig. 13 illustrate.

[0156] With reference to Fig. 13 to Fig. 15. In this example, a first spring cap 252 can be provided multiple times, and the multiple first spring caps 252 can be connected to each other by first cap connecting parts 2523.

[0157] Since the first spring cap 252 is essentially the same as the first spring cap 152 of the preceding example of Fig. 8 is, its exact description is given by the description of Fig. 8 replaced.

[0158] In some implementations, a first spring support surface 2521d may be formed on the top side of a first spring support section 2521, which defines the first spring cap 252. The first spring support surface 2521d may be inclined with respect to the cap mounting surface 111a of the base housing 111 by a predetermined angle α1, which may be referred to as a 'first support surface inclination angle'.

[0159] Additionally, a first spring insertion section 2522, which defines the first spring cap 252, can be inclined with respect to the cap mounting surface 111a of the base housing 111 by a predetermined inclination angle β1, which can be referred to as a 'first insertion section inclination angle'.

[0160] The first insertion section inclination angle β1 can be equal to the first support surface inclination angle α1. In other words, the first spring insertion section 2522 can be perpendicular to the first spring support surface 2521d.

[0161] However, in the example described above, the first spring caps 152 are arranged individually on the cap mounting surface 111a to be spaced apart from each other, but the multiple first spring caps 252 of this example can be arranged together on the cap mounting surface 111a by connecting them together.

[0162] For example, one end of the first cap connecting part 2523 can extend from an outer circumferential surface of one of the first spring carrier sections 2521, each defining a section of a first spring cap 252, and another end of the first cap connecting part 2523 can be connected to an outer circumferential surface of another of the first spring carrier sections 2521 that is adjacent to it.

[0163] Accordingly, the multiple first spring caps 252 can be connected to each other by the first cap connecting parts 2523, which have a square band shape. Then, when the multiple first spring caps 252 are mounted on the base housing 111, the multiple first spring caps 252 can be mounted together.

[0164] A second spring cap 253 of this example is similar to the first spring cap 252. That is, the second spring cap 253 can be provided multiple times and the multiple second spring caps 253 can be connected to each other by second cap connecting parts 2533.

[0165] The second spring caps 253 are essentially the same as the second spring caps 153 of the previous example of Fig. 11, which is why their precise description is achieved by describing Fig. 11 is replaced.

[0166] In some implementations, a second spring support surface 2531d can be formed on the top side of a second spring support section 2531, which defines the second spring cap 253. The second spring support surface 2531d can be inclined with respect to the cap mounting surface 111a of the base housing 111 by a predetermined inclination angle α2, which can be referred to as a 'second support surface inclination angle'.

[0167] Additionally, a second spring insertion section 2532, which defines the second spring cap 253, can be inclined with respect to the cap mounting surface 111a of the base housing 111 by a predetermined inclination angle β2, which can be referred to as a 'second insertion section inclination angle'.

[0168] The second insertion section inclination angle β2 can be equal to the second support surface inclination angle α2. In other words, the second spring insertion section 2532 can be perpendicular to the second spring support surface 2531d.

[0169] However, in the example described above, the second spring caps 153 are arranged individually on the cap mounting surface 111a to be spaced apart from each other, but the multiple first spring caps 253 of this example can be arranged together on the cap mounting surface 111a by connecting them together.

[0170] For example, with regard to the multiple second spring caps 253, one end of the second cap connecting part 2533 can extend from an outer circumferential surface of one of the second spring carrier sections 2531, each defining a section of one of the second spring caps 253; more precisely, one end of the second cap connecting part 2533 can extend from an end of one of the cap fastening projections 2531c of the second spring sections 2531, and another end of the second cap connecting part 2533 can be connected to an end of another of the cap fastening projections 2531c located adjacent to it.

[0171] Accordingly, the multiple second spring caps 253 can be connected to each other by the second cap connecting parts 2533, which have a square band shape. In other words, the multiple second spring caps 253 can be connected to each other by the second cap connecting parts 2533 to form a kind of modularized second spring cap. Then, when the multiple second spring caps 253 are mounted on the compressor body C, the multiple second spring caps 253 can be mounted together or simultaneously, which simplifies the assembly process.

[0172] Fig. Figure 16 is a schematic view of the support part in Fig. 13 from a lateral direction (a side direction) to explain its effects.

[0173] With reference to Fig. 16. Since the multiple first spring caps 252 and the multiple second spring caps 253 of this example are arranged in an inclined manner, as in the example described above, the longitudinal stiffness Kz' and the transverse stiffness Kx' can be provided in each support spring 151. This can be done as in the example of Fig. 12 enable the transverse amplitude of the compressor body C to be effectively reduced.

[0174] However, the several first spring caps 252 and the several second spring caps 253 of this example can be connected to each other by the first cap connecting parts 2523 and the second cap connecting parts 2533, respectively.

[0175] Accordingly, the first spring caps 252 can hold each other reciprocally, and the second spring caps 253 can hold each other reciprocally. This can prevent the first spring caps 252 and the second spring caps 253 from being pressed in the radial direction, which allows the first spring caps 252 and the second spring caps 253 to be more securely fastened.

[0176] This means that if the compressor body C oscillates in a left-hand direction as shown in the drawing, a force is exerted on the first spring cap 252 and the second spring cap 253 in the left-hand direction shown in the drawing, which is represented by an arrow with a solid line. Accordingly, the first spring cap 252 or the second spring cap 253 can absorb a force in a direction in which the first spring cap 252 or the second spring cap 253 is separated from the base housing 111 or the compressor body C.

[0177] However, if the several first spring caps 252 are connected to each other by the first cap connecting parts 2523 and the several second spring caps 253 are connected to each other by the second cap connecting parts 2533, the force that occurs in the separation direction of the first spring cap 252 can be balanced by the first cap connecting parts 2523, as shown by an arrow with a dotted line, and the force that is exerted in the separation direction of the second spring cap 253 can be balanced by the second cap connecting parts 2533.

[0178] Then the support springs 151 can safely support the compressor body C by being arranged in an inclined manner, while effectively preventing the first spring caps 252 and the second spring caps 253 from separating from their respective solid surfaces.

[0179] Although not illustrated in the drawings, one of the first spring caps and the second spring cap can be provided individually, and the remaining spring caps can be connected to each other by the cap connecting parts. The basic structure and operating effects are the same as or similar to those of the examples described above, and therefore their detailed description is omitted.

[0180] The following is a description of an example of a cap mounting groove.

[0181] That is, in the example described above, the cap mounting grooves, which are provided on both sides of each cap mounting surface, are arranged radially with respect to the center of the compressor body; however, in some cases the cap mounting grooves may be arranged parallel.

[0182] Fig. Figure 17 is a top view of a base surface of a base housing to show an example of an arranged state of a cap fastening groove in Fig. 1.

[0183] With reference to Fig. 17 Several cap fastening grooves 111c, each provided on both sides of a cap mounting groove 111b in the cap mounting surface 111a, can be arranged parallel to several cap fastening grooves 111c, which are provided on a further cap mounting surface 111a, which is arranged adjacent to it.

[0184] For example, the multiple cap fastening grooves 111c can be elongated along a centerline CL in a reciprocating direction of the piston 132. Specifically, a first virtual line VL1, which traverses the multiple cap fastening grooves 111c, can be parallel to the centerline CL in the reciprocating direction of the piston 132.

[0185] Accordingly, the cap mounting projection 1521c can be parallel to a side surface of the compressor body (more precisely, the stator core) C. In other words, since the cap mounting projections 1521c, which are formed on both sides of the first cap support projection 1521b, each correspond to the cap mounting grooves 111c, the cap mounting projections 1521c can also be arranged such that they are parallel to the centerline CL in the reciprocating direction of the piston 132, just as they are to the centerline of the cap mounting grooves 111c.

[0186] Therefore, if the cap mounting grooves 111c are arranged such that they are parallel to the center line CL in the direction of reciprocating movement of the piston 132, the first spring support surface 1521d and the second spring support surface 1531d can also be inclined in a direction perpendicular to the center line CL in the direction of reciprocating movement of the piston 132.

[0187] Even in this case, the effects can be essentially similar to those of the example described above. That is, the intervals between the multiple support springs 151 increase towards the cap mounting surfaces 111c in order to increase the transverse stiffness of each support spring 151, which allows the compressor body C to be effectively supported.

[0188] Furthermore, in this example, since the support springs 151, the first spring caps 152 and the second spring caps 153 are arranged in such a way that they are parallel to each other, the manufacturing and assembly processes of the support parts 150 containing them can be simplified. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] US 2016 / 0195080 A1

[0008]

Claims

[1] Compressor comprising: a housing (110) defining an external appearance; a compressor body (C) arranged to be spaced from an inner surface of the housing (110) and including a motor unit (120) and a compression unit (130); at least one support spring (151) arranged between the housing (110) and the compressor body (C) and elastically supporting the compressor body (C) with respect to the housing (110); and at least one first spring cap (152) fixed to the inner surface of the housing (110) and at least one second spring cap (153) fixed to the compressor body (C) such that both ends of the support spring (151) are each supported by one of the first and second spring caps (152, 153), respectively, wherein the support spring (151) is arranged such that it is inclined with respect to an axial direction of the compressor. [2] A compressor according to claim 1, wherein the first and / or second spring cap (152, 153) comprise: a spring support portion (1521, 1531) fixed to the inner surface of the housing (110) or the compressor body (C) to support one end of the support spring (151); and a spring insertion portion (1522, 1532) extending from the spring support portion (1521, 1531) such that it is inserted into one end of the support spring (151), wherein a center line (CL2) passing through a center of the spring insertion portion (1522, 1532) is inclined with respect to a center line (CL) of the compressor in the axial direction and / or the spring support portion (1521, 1531) has a wedge shape. [3] The compressor according to claim 2, wherein the spring support portion (1521, 1531) has a spring support surface (1521d, 1531d) on which the spring insertion portion (1522, 1532) is arranged, and the spring support surface (1521d, 1531d) is inclined with respect to the axial direction. [4] A compressor according to claim 3, wherein the spring support surface (1521d, 1531d) is perpendicular to the center line (CL2) of the spring insertion portion (1522, 1532). [5] A compressor according to any one of the preceding claims, wherein the first spring cap (152) is provided with at least one cap fixing projection (1521c) formed on its surface facing the inner surface of the housing (110), and the inner surface of the housing (110) is provided with a cap fixing groove (111c) into which the cap fixing projection (1521c) is fitted. [6] The compressor according to claim 5, wherein the cap fixing projection (1521c) and / or the cap fixing groove (111c) extend radially with respect to a center line (CL) of the compressor in the axial direction or perpendicular to a radial direction with respect to the center line (CL) of the compressor or perpendicular to a respective plane defined by a direction in which the support spring (151) extends and the center line (CL) of the compressor, or the cap fixing projections (1521c) of a plurality of first spring caps (152) and the corresponding cap fixing grooves (111c) are arranged circumferentially with respect to the center line (CL) of the compressor and / or extend parallel to each other. [7] A compressor according to any one of the preceding claims, wherein the second spring cap (153) fixed to the compressor body (C) is provided with a cap support projection (1531c) formed on a cap mounting surface (1531a) facing the compressor body (C), the cap support projection (1531c) being arranged to cover a side edge of the compressor body (C). [8] A compressor according to claim 7, wherein the cap support projection (1531c) is formed at an edge of the cap mounting surface (1531a) and is provided with a screw insertion groove (1531b) formed in a countersunk manner to allow a fastening screw (1215) fixed to the motor unit (120) to be inserted therein. [9] A compressor according to any one of the preceding claims, wherein a plurality of support springs (151) are arranged along a circumference of the compressor body (C) such that they are spaced apart by predetermined intervals, the support springs (151) are arranged such that they are symmetrical to each other with respect to a center line (CL) of the compressor body (C), and Spaces between the support springs (151) to the housing (110) increase and / or ends of the support springs (151) supported by the second spring caps (153) are closer to each other than ends of the support springs (151) supported by the first spring caps (152). [10] A compressor according to any one of the preceding claims, wherein a first attachment point (P1) is located radially outward with respect to a second attachment point (P2) when a point at which the first spring cap (152) is attached to the inner surface of the housing is referred to as the first attachment point (P1) and a point at which the second spring cap (153) is attached to the compressor body (C) is referred to as the second attachment point (P2), and / or a first distance (L1) is greater than a second distance (L2) when a radial distance from an axial center line (CL) of the compressor body (C) to the first spring cap (152) is referred to as the first distance (L1) and a radial distance from the axial center line (CL) of the compressor body (C) to the second spring cap (153) is referred to as the second distance (L2). [11] A compressor according to any one of the preceding claims, wherein the first spring cap (152) and the second spring cap (153) are provided in plural numbers and the first spring caps (152) and / or the second spring caps (153) are connected to each other by cap connecting parts (2523, 2533) extending therefrom.

Images