Compressor

Abstract

Disclosed is a compressor including an improved support structure, wherein the compressor is capable of ultra-low speed operation, and colliding of a case and components inside the case is prevented. The compressor comprises: a case; a compression unit for compressing a refrigerant in the case; and a support device fixed to the case and supporting the compression unit. The support device comprises: a compression spring disposed between the case and the compression unit; and a tension spring disposed in parallel with the compression spring.

Description

compressor

[0001] The present disclosure relates to a compressor including an improved support structure.

[0002] Generally, a compressor is a mechanical device that receives power from a power generation device, such as a motor or turbine, and compresses air, refrigerants, or various other working gases to increase pressure; it can be widely used in home appliances such as refrigerators and air conditioners, as well as across various industries.

[0003] Compressors can be classified into reciprocating compressors, rotary compressors, and scroll compressors depending on the compression method and hermetic structure.

[0004] A reciprocating compressor can have a structure in which a compression space is formed between the piston and the cylinder where the working gas is sucked in and discharged, so that the piston moves in a straight reciprocating motion inside the cylinder to compress the refrigerant.

[0005] A hermetic reciprocating compressor includes a compressor mechanism that compresses refrigerant through the reciprocating motion of a piston and an electric motor mechanism that drives the compressor mechanism, and the compressor mechanism and the electric motor mechanism can be installed inside a single case.

[0006] One aspect of the present disclosure provides a compressor capable of ultra-low speed operation.

[0007] One aspect of the present disclosure provides a compressor comprising a support device capable of varying stiffness to avoid natural frequency.

[0008] One aspect of the present disclosure provides a compressor in which collision between the case and the internal parts is prevented.

[0009] The technical problems to be solved in this document are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which this invention belongs from the description below.

[0010] To solve the above problem, a compressor according to one embodiment of the present disclosure comprises a case, a compression unit for compressing a refrigerant within the case, and a support device fixed to the case and supporting the compression unit, wherein the support device may include a compression spring disposed between the case and the compression unit and a tension spring disposed in parallel with the compression spring.

[0011] A compressor according to one embodiment of the present disclosure comprises a case forming a sealed container, a compression unit for compressing a refrigerant within the case, and a support device fixed to the case and supporting the compression unit. The support device may include a compression spring disposed between the case and the compression unit to support the compression unit, and a tension spring disposed in the inner space of the compression spring to support the compression unit and enable adjustment of the applied tension.

[0012] According to the concept of the present disclosure, the compressor may be capable of ultra-low speed operation.

[0013] According to the concept of the present disclosure, a support device supporting a compressor can vary its stiffness to avoid natural frequencies.

[0014] According to the concept of the present disclosure, collisions between the case and the internal parts can be prevented.

[0015] FIG. 1 is a schematic cross-sectional view of a compressor according to one embodiment.

[0016] Figure 2 is a drawing showing the lower part of the compressor illustrated in Figure 1.

[0017] FIG. 3 is a perspective view illustrating a support device according to one embodiment.

[0018] FIG. 4 is an exploded perspective view of the support device shown in FIG. 3.

[0019] FIG. 5 is a side cross-sectional view illustrating the state before the adjustment screw and the length adjustment member are combined in a support device according to one embodiment.

[0020] Figure 6 is a drawing showing the state in which the head part is seated on the joint part after the adjustment screw is rotated in Figure 5.

[0021] Figure 7 is a diagram illustrating the state in which a tension force is applied to the tension spring by additionally rotating the adjustment screw in Figure 6.

[0022] Figure 8 is an enlarged view of part A of Figure 7.

[0023] Figure 9 is an enlarged view of part B of Figure 7.

[0024] The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments.

[0025] In relation to the description of the drawings, similar reference numerals may be used for similar or related components.

[0026] The singular form of the noun corresponding to the item may include one or multiple items, unless the relevant context clearly indicates otherwise.

[0027] In this document, each of the phrases such as "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "at least one of A, B, or C" may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof.

[0028] The term "and / or" includes a combination of multiple related described components or any of the multiple related described components.

[0029] The terms "part," "module," and "component" may be implemented in hardware or software. Depending on the embodiments, a plurality of "parts," "modules," and "components" may be implemented as a single component, or a single "part," "module," or "component" may include a plurality of components.

[0030] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish a component from another component and do not limit the components in other aspects (e.g., importance or order).

[0031] Where any (e.g., 1st) component is referred to as "coupled" or "connected" to another (e.g., 2nd) component, with or without the terms "functionally" or "communicationly," it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0032] Terms such as "include" or "have" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in this document, and do not preclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0033] When it is said that a component is "connected," "combined," "supported," or "in contact" with another component, this includes not only cases where the components are directly connected, combined, supported, or in contact, but also cases where they are indirectly connected, combined, supported, or in contact through a third component.

[0034] When it is said that a component is located "on" another component, this includes not only cases where one component is in contact with the other, but also cases where another component exists between the two components.

[0035] Meanwhile, terms such as "up," "down," "horizontal direction," and "vertical direction" used in the following description are defined based on the drawings, and the shape and position of each component are not limited by these terms.

[0036] Among the expressions used in the following description, "upper ~", "lower ~", etc., may be used to distinguish components by considering their relative positions, and these expressions may be replaced with expressions such as "first ~", "second ~".

[0037] Hereinafter, preferred embodiments according to the present disclosure will be described in detail with reference to the attached drawings. One embodiment of the compressor (1) according to the present disclosure is a hermetic reciprocating compressor, but the present disclosure is not limited thereto.

[0038] In addition, the compressor (1) according to the present disclosure can be used in various home appliances such as refrigerators and water purifiers, and can be used mainly in refrigerators, but is not limited thereto.

[0039] FIG. 1 is a schematic cross-sectional view of a compressor according to one embodiment, and FIG. 2 is a drawing showing the lower part of the compressor shown in FIG. 1.

[0040] As described, the compressor (1) may include a case (10) forming an exterior and a compression section (20, 30) for compressing a refrigerant within the case (10). The case (10) may be made of a metal material.

[0041] The case (10) may include an upper case (10a) and a lower case (10b). The case (10) may be formed by combining the upper case (10a) and the lower case (10b) to seal the internal space, thereby forming a sealed container.

[0042] The case (10) can be manufactured by plastically processing a steel plate using a deep drawing method, etc. That is, the case (10) can be manufactured by welding two steel plate structures made in a hemispherical shape, and a press method can be used to manufacture a steel plate sheet having a predetermined thickness into a hemispherical shape.

[0043] The case (10) may include a receiving space (11) provided to accommodate a component at a certain distance from the component to prevent contact with the component entering the inside of the compressor (1).

[0044] Oil (13) for lubrication and cooling between various components of the compressor (10) can be stored in the lower part of the case (10).

[0045] The compressor (1) may include a frame (12) that fixes the internal components of the case (10). The compressor (1) may include a compressor mechanism (20) installed on the upper side of the frame (12) and compressing the refrigerant in an operating state as a compression unit for compressing the refrigerant inside the case (10), and an electric motor mechanism (30) installed on the lower side of the frame (12) to drive the compressor mechanism (20) and providing power to the compressor mechanism (20).

[0046] The compressor mechanism (20) may include a cylinder (21) that forms a compression space for the refrigerant and is fixed to the frame (12), and a piston (22) that moves back and forth inside the cylinder (21) to compress the refrigerant.

[0047] The electric motor mechanism (30) may include a stator (100) fixed to a frame (12) and a rotor (31) that rotates inside the stator (100).

[0048] The cylinder (21) may be made of aluminum. The aluminum material may be aluminum or an aluminum alloy. Due to the aluminum material being non-magnetic, the magnetic flux generated from the rotor (31) may not be transmitted to the cylinder (21).

[0049] Therefore, the magnetic flux generated in the rotor (31) can be transmitted to the cylinder (21) and prevented from leaking out of the cylinder (21).

[0050] The piston (22) can be made of aluminum material, just like the cylinder (21). Therefore, just like the cylinder (21), the magnetic flux generated from the rotor (31) can be transmitted to the piston (22) and prevented from leaking out of the piston (22).

[0051] Since the piston (22) is made of the same material as the cylinder (21), it can have a thermal expansion coefficient almost identical to that of the cylinder (21).

[0052] As they have nearly identical coefficients of thermal expansion, the piston (22) can be thermally deformed by nearly the same amount as the cylinder (21) in the internal environment of the high-temperature case (10) when the compressor (1) is driven.

[0053] Therefore, interference between the piston (22) and the cylinder (21) can be prevented during the reciprocating motion of the piston (22) within the cylinder (21).

[0054] The rotor (31) may include a hollow (31a). The stator (100) may include a stator core (110) corresponding to a fixed part during the operation of the electric motor mechanism (30) and a stator coil (130) mounted on the inside of the stator core (110).

[0055] The stator core (110) is made of metal and can have a roughly cylindrical shape. When voltage is applied from a power supply (not shown), the stator coil (130) generates an electromagnetic force and can perform electromagnetic interaction with the stator core (110) and the rotor (31).

[0056] The electric motor mechanism (30) may include an insulator (120) disposed between the stator core (110) and the stator coil (130). The insulator (120) can prevent direct contact between the stator core (110) and the stator coil (130).

[0057] The insulator (120) may include an upper insulator (121) positioned on the upper part of the stator core (110) and a lower insulator (122) positioned on the lower part of the stator core (110).

[0058] The stator coil (130) can be wound together with the stator core (110), upper insulator (121), and lower insulator (122).

[0059] If the stator coil (130) comes into direct contact with the stator core (110), the generation of electromagnetic force from the stator coil (130) may be hindered. The insulator (120) can separate the stator core (110) and the stator coil (130) by a predetermined distance from each other.

[0060] The rotor (31) can be rotatably mounted inside the stator core (110). The rotor (31) may be equipped with a magnet (not shown). When voltage is applied, the rotor (31) can rotate through electromagnetic interaction with the stator core (110) and the stator coil (130).

[0061] The compressor (1) may include a rotating shaft (40) that is arranged in an up-and-down direction to transmit the driving force of the electric motor part (30) to the compressor part (20) and is rotatably supported by the shaft support part (13) of the frame (12).

[0062] The rotating shaft (40) can be pressed into the hollow (31a) of the rotor (31) and can rotate together with the rotor (31).

[0063] An eccentric portion (41) that is eccentric from the rotational center axis of the rotor (31) may be formed on the upper part of the rotating shaft (40), and the eccentric portion (41) may be connected to the piston (22) by a connecting rod (23).

[0064] Accordingly, the rotational motion of the rotating shaft (40) can be converted into the linear motion of the piston (22) by the connecting rod (23). The connecting rod (23) may be made of a sintered alloy material.

[0065] The oil (13) stored in the lower part of the case (10) can be raised through the rotating shaft (40) and supplied to each component.

[0066] The rotating shaft (40) may have a hollow portion (44) to allow oil stored in the case (10) to rise through its inner surface. A pickup shaft (50) may be inserted into the hollow portion (44).

[0067] The pickup shaft (50) can be supported by a connecting member (60). Therefore, the pickup shaft (60) may not rotate even when the rotation shaft (40) rotates.

[0068] The compressor (1) may include a bracket (200) coupled to the lower part of the stator core (110). The bracket (200) may support the stator core (110).

[0069] The connecting member (60) can be coupled to the bracket (200). The pickup shaft (60) can be coupled to the hollow portion (44).

[0070] The compressor (1) may include a support device (300) for supporting components inside the compressor (1), including an electric motor part (30) and a compressor part (20).

[0071] The support device (300) can be placed at the bottom of the case (10). The support device (300) can be placed between the case (10) and the bracket (200).

[0072] The support device (300) can connect the case (10) and the bracket (200). One end of the support device (300) is connected to the bracket (200), and the other end of the support device (300) can be connected to the lower part of the case (10).

[0073] The support device (300) can cushion shocks to protect the internal components of the compressor (1) from external shocks transmitted from outside the compressor (1) to the compressor (1) through the case (10). The support device (300) can dampen vibrations that occur during the operation of the motor mechanism (30) and the compressor mechanism (20).

[0074] The support device (400) may be provided in multiple numbers. For example, the support device (300) may be provided in four numbers and positioned at each of the four corners of the bracket (200) to distribute the vibration and load transmitted to the bracket (200) and provide stable support.

[0075] FIG. 3 is a perspective view illustrating a support device according to one embodiment. FIG. 4 is an exploded perspective view of the support device illustrated in FIG. 3. FIG. 5 is a side cross-sectional view illustrating the state before the adjustment screw and the length adjustment member are combined in the support device according to one embodiment.

[0076] Referring to the drawing, the support device (300) may include a compression spring (310) and a tension spring (320). The compression spring (310) and the tension spring (320) may be arranged in parallel. For example, the tension spring (320) may be placed in the inner space of the compression spring (310). Thus, the compression spring (310) and the tension spring (320) complement each other's vibration characteristics and can support the components inside the compressor (1), including the electric motor part (30) and the compression mechanism part (20).

[0077] The compression spring (310) and the tension spring (320) can be arranged in an up-and-down direction. For example, the upper portions of the compression spring (310) and the tension spring (320) may be positioned adjacent to a bracket (200) positioned above the case (10), and the lower portions of the compression spring (310) and the tension spring (320) may be positioned adjacent to the lower portion of the case (10).

[0078] The support device (300) may include a first fixing member (330). The first fixing member (330) may be provided to support one end of the compression spring (310) and the tension spring (320).

[0079] The first fixing member (330) can be fixed by being coupled to the bracket (200). For example, it can be double-injected into the bracket (200) and coupled to the bracket (200).

[0080] The first fixing member (330) may be positioned to protrude downward from the lower surface of the bracket (200). The first fixing member (330) may include a first seating portion (331) on which the upper end (311) of the compression spring (310) can be seated.

[0081] The first seating portion (331) may be provided to face the upper portion (311) of the compression spring (310) so as to press the upper portion (311) of the compression spring (310).

[0082] The first seating portion (331) can be formed along the circumference of the upper portion (311) of the compression spring (310) so as to be in contact with the upper portion (311) of the compression spring (310).

[0083] The first fixing member (330) may include a first boss portion (332). The first boss portion (332) may be formed to protrude downward. The first boss portion (332) may protrude downward from the first seating portion (331). The first boss portion (332) may be formed in a cylindrical shape so that a compression spring (310) can be inserted. The first boss portion (332) may be formed in a cylindrical shape having an outer diameter less than or equal to the inner diameter of the compression spring (310). At least a portion of the first boss portion (332) may be formed to contact the inner surface of the compression spring (310), and the upper part of the compression spring (310) may be supported by the first boss portion (332) and the first seating portion (331).

[0084] The first fixed member (330) may include a first hollow portion (333). The first hollow portion (333) may be formed as an empty space inside the first boss portion (332).

[0085] The first hollow portion (333) can provide a space in which the upper part of the tension spring (320) can be accommodated. The lower part of the first hollow portion (333) can be open so that the tension spring (320) can be inserted.

[0086] The support device (300) may include a second fixing member (340).

[0087] The second fixing member (340) may be provided to support the other end of the compression spring (310) and the tension spring (320).

[0088] The second fixing member (340) may be positioned to protrude upward from the bottom of the case (10). The second fixing member (340) may include a second seating portion (341) on which the lower end (312) of the compression spring (310) can be seated.

[0089] The second seating portion (341) may be provided to face the lower end (312) of the compression spring (310) so as to press the lower end (312) of the compression spring (310).

[0090] The second seating portion (341) can be formed along the circumference of the bottom (312) of the compression spring (310) so as to be in contact with the bottom (312) of the compression spring (310).

[0091] The second fixing member (340) may include a second boss portion (342). The second boss portion (342) may be formed to extend upward. The second boss portion (342) may protrude upward from the second seating portion (341). The second boss portion (342) may be formed in a cylindrical shape so that a compression spring (310) can be inserted. The second boss portion (342) may be formed in a cylindrical shape having a diameter less than or equal to the inner diameter of the compression spring (310).

[0092] At least a portion of the second boss portion (342) may be formed to be in contact with the inner surface of the compression spring (310), and the lower part of the compression spring (310) may be supported by the second boss portion (342) and the second seating portion (341).

[0093] The second fixed member (340) may include a second hollow portion (343). The second hollow portion (343) may be formed as a cylindrical empty space inside the second boss portion (342), and the upper and lower ends may be open.

[0094] The second fixing member (340) can be coupled to the lower portion (321) of the tension spring (320). The second fixing member (340) can be coupled to the tension spring (320) in various ways. For example, the second fixing member (340) can be double-injected into the tension spring (320) and coupled to the tension spring (340). In this case, the second fixing member (340) and the tension spring (320) can be formed integrally, and at least a portion of the lower part of the tension spring (200) can be embedded within the second fixing member (340).

[0095] In addition to the method in which the second fixing member (340) is double-injected and joined to the tension spring (320), the concept of the present disclosure may also include the method in which the tension spring (320) is joined to the second hollow portion (343) of the second fixing member (340) by a press fit method, joining using an adhesive, or joining by a heat fusion method by high-frequency heating while the tension spring (320) is inserted into the second hollow portion (343).

[0096] The support device (300) may include a third fixing member (350).

[0097] The third fixing member (350) can fix the second fixing member (340) to the case (10). The third fixing member (350) may include a fixing part (351) that is coupled to the case (10). The fixing part (351) may be formed in a flange shape that is extended horizontally to form a wide contact surface with the case (10).

[0098] The third fixing member (350) may include an insertion part (352) that is coupled to the second fixing member (340). The insertion part (352) may be provided to be insertable into the lower end (321) of the tension spring (320) and the second hollow part (343) of the second fixing member (340). The insertion part (352) may be formed in a cylindrical shape so as to be insertable into the lower end (321) of the tension spring (320) and the second hollow part (343) of the second fixing member (340).

[0099] The insertion part (352) can come into contact with the inner surface of the lower part (321) of the tension spring (320) while inserted into the second hollow part (343) of the second fixing member (340).

[0100] The insert portion (352) can be joined by an interference fit when combined with the lower portion (321) of the tension spring (320). Accordingly, the diameter of the insert portion (352) can be formed to be slightly larger than the inner diameter of the tension spring (320), and a strong frictional force acts between the tension spring (320) and the insert portion (352) while the insert portion (352) is joined by an interference fit, thereby maintaining a strong fastening force.

[0101] The support device (300) may include a length adjustment member (360). The length adjustment member (360) may be placed on the upper portion (322) of the tension spring (320). The length adjustment member (360) may be coupled to the upper portion (322) of the tension spring (320). The length adjustment member (360) may be formed in a ring shape to surround the upper portion (322) of the tension spring (320).

[0102] The length adjustment member (360) can be combined with the tension spring (320) in various ways. For example, the length adjustment member (360) can be double-injected into the tension spring (320) and combined with the tension spring (340). In this case, the length adjustment member (360) and the tension spring (320) can be formed integrally, and at least a portion of the upper part (322) of the tension spring (200) can be embedded within the length adjustment member (360).

[0103] The length adjustment member (360) may be provided to be accommodated within the first hollow portion (333) of the first fixing member (330). The length adjustment member (360) may be formed in a polygonal or cylindrical shape corresponding to the first hollow portion (333) of the first fixing member (330) and accommodated within the first hollow portion (333). The length adjustment member (360) may be formed in a shape and size corresponding to the first hollow portion (333) so as to be accommodated within the first hollow portion (333). While the length adjustment member (360) is accommodated within the first hollow portion (333), vertical movement may be guided through the inner wall of the first hollow portion (333).

[0104] The length adjustment member (360) may include a first screw thread portion (361). The first screw thread portion (361) may be formed as a female screw thread. Accordingly, the length adjustment member (360) may be formed as a nut structure overall.

[0105] The support device (300) may include an adjustment screw (370). The adjustment screw (370) may include a column portion (372) having a second thread portion (371) formed with a male thread corresponding to the first thread portion (361) of the length adjustment member (360) so as to be coupled with the first thread portion (361) of the length adjustment member (360), and a head portion (373) formed at one end of the column portion (372).

[0106] The column portion (372) can be formed in a cylindrical shape overall, and a second screw thread portion (371) can be formed along the longitudinal direction on the outer surface.

[0107] The head portion (373) can be positioned at the top of the column portion (372) and can be formed to have a larger diameter than the column portion (372). A coupling groove (374) can be formed on the upper surface of the head portion (373) to which a tool (not shown) for applying rotational force to the adjustment screw (370) can be coupled.

[0108] The first fixing member (330) may include a coupling part (334) to which the adjusting screw (370) is coupled. The coupling part (334) may be provided to rotatably support the head part (373) of the adjusting screw (370). Additionally, the first fixing member (330) may include a through hole (335) through which the column part (372) of the adjusting screw (370) can pass, and the through hole (335) may be formed at the center of the coupling part (334).

[0109] The connecting portion (334) may be formed in a recessed shape on the upper surface of the first fixing member (335). The connecting portion (334) may be formed in a recessed shape corresponding to the head portion (374) so ​​as to provide a space in which the head portion (373) of the adjusting screw (370) can be accommodated.

[0110] The first thread portion (361) of the length adjustment member (360) and the second thread portion (371) of the adjustment screw (370) can be formed to have the same pitch.

[0111] Referring to FIG. 5, the adjustment screw (370) passes through the coupling portion (334) of the first fixing member (330), and the second thread portion (371) can be coupled with the first thread portion (361) to become rotatable. In this state, the second thread portion (371) engages with the first thread portion (361), and the adjustment screw (370) can move downward, and the length adjustment member (360) can maintain the initial position where no tension is applied to the tension spring (320).

[0112] FIG. 6 is a drawing showing the state in which the head part is seated on the joint part after the adjustment screw is rotated in FIG. 5. FIG. 7 is a drawing showing the state in which a tension force is applied to the tension spring after the adjustment screw is further rotated in FIG. 6. FIG. 8 is an enlarged view of part A in FIG. 7. FIG. 9 is an enlarged view of part B in FIG. 7.

[0113] Referring to FIGS. 6 to 9, as the adjustment screw (370) continues to rotate and moves downward, when the lower surface of the head part (373) and the upper surface of the coupling part (334) come into contact, the adjustment screw (370) is rotatably supported by the coupling part (334) and can rotate without moving downward.

[0114] In this way, when the adjustment screw (370) is supported by the coupling part (334) and rotates, the length adjustment member (360) moves upward in proportion to the amount of rotation of the adjustment screw (370) and can apply tension to the tension spring (320).

[0115] In this case, the length adjustment member (360) can be raised by 1 pitch per rotation of the adjustment screw (370). For example, if 1 pitch is 0.5 mm, rotating the adjustment screw (370) 4 times can cause the length adjustment member (360) to be raised by 2 mm, corresponding to 4 pitches, and cause a displacement so that tension is applied to the tension spring (320), and rotating the adjustment screw (370) 8 times can cause the length adjustment member (360) to be raised by 4 mm, corresponding to 8 pitches, and cause a displacement so that tension is applied to the tension spring (320).

[0116] With this configuration and method, the tension applied to the tension spring (320) can be varied according to the amount of rotation of the adjustment screw (370). Accordingly, the tension spring (320) can adjust the applied tension and displacement by means of the adjustment screw (370), thereby compensating for the characteristics of vibration and displacement caused by the compression spring (310).

[0117] The compression spring (310) is configured to have a low elastic modulus so as to be able to respond when the compressor (1) is operated at a low speed, and the compression spring (310) is supported through the tension spring (320), and the total amount of displacement can be limited through the tension force applied to the tension spring (32).

[0118] For example, even when the compressor (1) is operated at an ultra-low speed of 750 rpm or less, a compression spring (310) having a low elastic modulus is used in the support device (300) to respond to vibration characteristics resulting from ultra-low speed operation, and even in situations where rapid displacement may occur, such as when the compressor (1) stops operating or starts up, the vertical and horizontal displacement may be limited by the supporting force and tension force of the tension spring (320). Therefore, since the occurrence of displacement is limited even in situations where excessive displacement may occur, such as when the compressor (1) stops operating or starts up, problems such as noise and damage to parts caused by collision between the case (10) and the internal parts of the case (10) can be prevented.

[0119] In addition, the support device (300) according to the present disclosure can be used in common with various compressors having different masses or different rotational speed ranges, as the tension spring (320) within the support device (300) can have its tension force varied according to the amount of rotation of the adjustment screw (370) as described above.

[0120] For example, in the case of a small compressor with a small compression capacity, the support device (300) can be set by adjusting the amount of rotation of the adjustment screw (370) so that the tensile force by the tension spring (320) does not act or acts weakly in the general stable operating state where the amount of displacement is small.

[0121] In the case of a large compressor with a large compression capacity, the amount of rotation of the adjustment screw (370) is adjusted so that the elasticity of the compression spring (310) and the elasticity of the tension spring (320) can act simultaneously by adjusting the amount of rotation of the adjustment screw (370) so that the tension force by the tension spring (320) acts greatly.

[0122] The effects obtainable from the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure belongs from the description below.

[0123] Specific embodiments have been illustrated and described above. However, the invention is not limited to the embodiments described above, and those skilled in the art may make various modifications without departing from the essence of the technical concept of the invention as described in the following claims.

Claims

1. Case; A compression unit for compressing the refrigerant within the above case; and A support device fixed to the above case and supporting the above compression part; including The above support device is, A compression spring disposed between the above case and the above compression part; and A compressor comprising a tension spring arranged in parallel with the above compression spring.

2. In Paragraph 1, The above tension spring is, A compressor positioned in the inner space of the above-mentioned compression spring.

3. In Paragraph 2, The above support device is a compressor configured to allow adjustment of the tension applied to the above tension spring.

4. In Paragraph 3, The above support device is, A first fixing member provided to support the upper portions of the above compression spring and tension spring; A second fixing member provided to support the lower portions of the above compression spring and tension spring; A length adjustment member coupled to the upper portion of the above tension spring; A compressor further comprising: a adjusting screw that causes the length adjusting member to move in the up and down direction as it rotates while rotatably coupled to the first fixing member and the length adjusting member.

5. In Paragraph 4, The above length adjustment member includes a first screw thread portion which is a female screw thread, and The above adjustment screw is a compressor comprising a column portion having a second thread portion formed therein, which is a male thread capable of being coupled to the first thread portion, and a head portion formed at one end of the column portion.

6. In Paragraph 5, The above-mentioned first fixed member is, A coupling part for rotatably supporting the above head part; It includes a through hole formed in the joint portion so that the above column portion can be penetrated; The above adjustment screw is a compressor that induces vertical movement of the length adjustment member as it rotates while the second threaded portion is coupled to the first threaded portion and the head portion is supported by the coupling portion.

7. In Paragraph 6, The above-mentioned first fixed member is, A first seating portion provided to face the upper portion of the compression spring in order to press the upper portion of the compression spring; A first boss portion formed to protrude downward from the first seating portion to support the upper portion of the above compression spring; and A compressor comprising: a first hollow portion formed on the inner side of the first boss portion.

8. In Paragraph 7, A compressor in which the first threaded portion is coupled to the second threaded portion while the above length adjusting member is positioned within the first hollow portion.

9. In Paragraph 1, It further includes a bracket positioned at the lower part of the compression part to support the compression part, and The first fixing member is a compressor that is double-injected and coupled to the bracket.

10. In Paragraph 4, A compressor in which at least a portion of the upper part of the above tension spring is embedded and coupled within the length adjustment member.

11. In Paragraph 4, A compressor in which at least a portion of the lower part of the above tension spring is embedded and coupled within the second fixing member.

12. In Paragraph 11, The above second fixing member is, A second seating portion provided to face the lower portion of the compression spring in order to press the lower portion of the compression spring; A second boss portion formed to protrude upward from the seating portion to support the lower portion of the compression spring; and A compressor comprising: a second hollow portion formed on the inner side of the second boss portion.

13. In Paragraph 12, A compressor further comprising a third fixing member coupled to the second fixing member to support the second fixing member while the support device is fixed to the case.

14. In Paragraph 13, The above third fixed member is, A fixing part coupled to the above case; and A compressor comprising: an insertion portion provided to be insertable into the lower portion of the tension spring and the second hollow portion of the second fixing member.

15. In Paragraph 14, The above insert is a compressor that is coupled to the lower end of the above tension spring by an interference fit.

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