Reciprocating compressor

Abstract

A reciprocating compressor according to one embodiment of the present specification is provided with a discharge unit comprising: a first discharge muffler having a first muffler body and a first muffler cover coupled to the first muffler body; a second discharge muffler having a second muffler body and a second muffler cover coupled to the second muffler body; a first discharge hose connecting the first discharge muffler and the second discharge muffler; and a second discharge hose connected to a discharge pipe that couples the second discharge muffler to a sealed container. Furthermore, the first discharge hose connecting the first discharge muffler and the second discharge muffler is made of a flexible material, and the second discharge hose connecting the second discharge muffler and the discharge pipe is made of a metal material. According to the reciprocating compressor with the structure, vibration generated in the compressor main body can be effectively blocked, the combination of the discharge hose and the discharge pipe can be reliably maintained, and noise of a desired frequency can be effectively reduced by adjusting the volume of the first discharge silencer and the volume of the second discharge silencer.

Description

Technical Field

[0001] The present specification relates to a reciprocating compressor, and more particularly, to a reciprocating compressor having a multi-discharge muffler. Background Art

[0002] Generally, a hermetic compressor is a compressor that has both an electric part that generates power and a compression part that receives the power of the electric part and operates inside a hermetic container.

[0003] The hermetic compressor may be classified into a reciprocating type, a rotary type, a vane type, a scroll type, etc. according to a method of compressing a refrigerant as a compressible fluid.

[0004] In the reciprocating compressor, a crankshaft is coupled to a rotor of an electric part, a connecting rod is coupled to the crankshaft, and a piston coupled to the connecting rod is made to linearly reciprocate inside a cylinder to compress refrigerant.

[0005] The reciprocating compressor includes: a sealed container forming a sealed space; an electric part, which is arranged in the sealed container and performs rotational motion; a compression part, which is arranged on the upper side of the electric part and receives the rotational force of the electric part and compresses the refrigerant; a suction part, which sucks the refrigerant and supplies it to the compression part; and a discharge part, which discharges the refrigerant compressed in the compression part.

[0006] Furthermore, the discharge unit includes a discharge muffler for attenuating discharge noise of the discharged refrigerant, a discharge pipe fixed to the sealed container and formed of a metal material, and a discharge hose for connecting the discharge muffler and the discharge pipe.

[0007] Figure 1 It is an exploded perspective view schematically showing the structure of a discharge portion provided in a reciprocating compressor of the related art.

[0008] Reference Figure 1 In the prior art, a plastic muffler body 1100 and a plastic muffler cover 1200 combined with the muffler body 1100 are laser welded to form discharge mufflers 1100 and 1200. In order to reduce the vibration of the compressor body from being transmitted to a closed container through a discharge hose 1300, the discharge hose 1300 is formed of a flexible material and is connected to a discharge pipe by providing an O-ring 1400 at one end of the discharge hose 1300.

[0009] exist Figure 1 In the figure, unexplained reference numerals 1500 and 1600 denote a suction muffler, and 1700 denotes a suction discharge tank.

[0010] remove Figure 1In addition to the structure of the discharge portion shown in the figure, discharge portions of various structures are disclosed in CN 108278191B, CN 100373049C, US20050106038A1, etc.

[0011] However, according to the conventional discharge portion structure, since only one discharge muffler is provided, there is a problem that noises of various frequencies cannot be effectively reduced.

[0012] Furthermore, since a discharge hose made of a flexible material is used, there is a problem that the discharge hose may melt due to heat transfer during the process of welding the discharge hose to the sealed container.

[0013] In addition, since the discharge hose is coupled to the discharge pipe by providing an O-ring at the end of the discharge hose, there are problems such as the O-ring being broken when the discharge hose is inserted into the discharge pipe or the O-ring falling off during use of the compressor.

[0014] Prior art literature

[0015] Patent Literature

[0016] Patent document 1: CN 108278191B

[0017] Patent document 2: CN 100373049C

[0018] Patent document 3: US20050106038A1 Summary of the invention

[0019] Problems to be solved by the invention

[0020] The present invention is intended to solve the above-mentioned problems.

[0021] The technical problem to be solved by this specification is to provide a reciprocating compressor in which a discharge muffler is separated into two or more parts, the discharge hose connecting the separated discharge mufflers is formed of a flexible material, and the discharge hose connecting the discharge muffler at the rear end and the discharge pipe is formed of a metal material.

[0022] Another technical problem to be solved by the present specification is to provide a reciprocating compressor having a discharge hose made of a metal material and a discharge hose made of a flexible material.

[0023] Another technical problem to be solved by the present specification is to provide a reciprocating compressor having a discharge portion that has a discharge hose made of a metal material and a discharge hose made of a flexible material and can effectively block vibration generated in a compressor body.

[0024] Another technical problem to be solved by the present specification is to provide a reciprocating compressor having a discharge portion that includes a discharge hose made of a metal material and a discharge hose made of a flexible material and can reliably maintain the connection between the discharge hose and the discharge pipe.

[0025] Another technical problem to be solved by the present specification is to provide a reciprocating compressor having a discharge portion capable of effectively reducing noise of various frequencies.

[0026] The technical issues to be solved in this specification are not limited to the technical issues mentioned above, and a person skilled in the art to which this specification belongs can clearly understand other technical issues not mentioned from the following description.

[0027] Technical solutions to the problem

[0028] According to one method of the present specification, the discharge part of a reciprocating compressor has a discharge muffler separated into two or more, and the discharge hose connecting the discharge muffler at the end of the path of the discharged refrigerant and / or gas to the discharge pipe is formed of a metal material, and the discharge hose connecting the separated discharge mufflers is formed of a flexible material.

[0029] As an example, the discharge portion may include: a first discharge muffler having a first muffler body and a first muffler cover coupled to the first muffler body; a second discharge muffler having a second muffler body and a second muffler cover coupled to the second muffler body; a first discharge hose connecting the first discharge muffler and the second discharge muffler; and a second discharge hose connected to a discharge pipe coupling the second discharge muffler to a sealed container.

[0030] Furthermore, the first discharge hose connecting the first discharge muffler and the second discharge muffler is formed of a flexible material, and the second discharge hose connecting the second discharge muffler and the discharge pipe is formed of a metal material.

[0031] Since the discharge portion of such a configuration includes the first discharge muffler and the second discharge muffler which are configured separately, it is possible to effectively reduce noise of a desired frequency by adjusting the volumes of the first discharge muffler and the second discharge muffler.

[0032] Furthermore, since the first discharge hose connecting the first discharge muffler and the second discharge muffler is formed of a flexible material, the vibration generated in the compressor body is transmitted to the second discharge muffler through the first discharge hose, thereby effectively preventing the vibration generated in the compressor body from being transmitted to the sealed container.

[0033] Furthermore, since the second discharge hose connecting the second discharge muffler and the discharge pipe is formed of a metal material, the discharge hose and the discharge pipe can be reliably connected without using a sealing member such as an O-ring.

[0034] According to the discharge portion having such a configuration, the first muffler body, the first muffler cover, and the second muffler body can be formed of plastic materials, respectively, and the second muffler cover can be formed of a metal material.

[0035] Furthermore, the second discharge hose made of metal and the second muffler cover made of metal may be joined to each other by brazing or by double injection molding, and the second discharge hose made of metal and the discharge pipe made of metal may be joined to each other by welding.

[0036] According to this configuration, the discharge hose and / or the sealing member (for example, O-ring) can be prevented from being damaged during the process of welding the discharge pipe to the sealed container and / or welding the second discharge hose and the discharge pipe.

[0037] The first muffler body and the first muffler cover can be combined with each other by laser welding, and the first discharge hose made of a flexible material can be combined with the first muffler cover and the second muffler body by double injection molding.

[0038] According to such a configuration, it is possible to simplify the manufacturing process and / or the joining process of the first discharge muffler and the first discharge hose.

[0039] The second muffler body made of plastic and the second muffler cover made of metal may be combined with each other by various mechanical combining methods.

[0040] For example, the second muffler body and the second muffler cover may be coupled to each other by any one fastening member selected from bolts (which may include nuts), screws or pins, or may be coupled to each other by clips, or may be coupled to each other by structures that mesh with each other.

[0041] As an example, the second muffler body may include a first side wall portion, and the second muffler cover may include a second side wall portion to which the first side wall portion of the second muffler body is coupled, and a bottom portion integrally formed with the second side wall portion and to which a second discharge hose made of metal is coupled.

[0042] In this case, the first side wall of the second muffler body may be coupled to the inside of the second side wall of the second muffler cover, and the second side wall of the second muffler cover may be coupled to the inside of the first side wall of the second muffler body.

[0043] Furthermore, a sealing member (eg, an O-ring or a gasket) may be located at least one of a region between the first side wall portion and the second side wall portion coupled to each other and between the bottom portion and an end portion of the first side wall portion.

[0044] According to this configuration, the refrigerant and / or gas flowing into the second discharge muffler can be prevented from leaking to the outside of the second discharge muffler through a fine gap formed between the first side wall of the second muffler body and the second side wall of the second muffler cover.

[0045] In a state where the second muffler body and the second muffler cover are combined, a portion of the first side wall portion may be located inside the second side wall portion, or a portion of the second side wall portion may be located inside the first side wall portion.

[0046] The second side wall portion of the second muffler cover may be formed to have an appropriate length capable of reliably maintaining the coupling between the second muffler body and the second muffler cover.

[0047] Furthermore, the second muffler body and the second muffler cover may be coupled to each other by bolts coupled to the first side wall and the second side wall in a horizontal direction, and a metal plate for pressing the second side wall toward the first side wall may be further provided on an outer surface of the second side wall.

[0048] At this time, a hole for bolt fastening is formed in the second side wall portion of the second muffler cover, and a groove for bolt fastening is formed in the first side wall portion of the second muffler body.

[0049] Therefore, since the bolt completely penetrates the second side wall portion of the second muffler cover but does not completely penetrate the first side wall portion of the second muffler body, it is possible to prevent the refrigerant and / or gas flowing into the second discharge muffler from leaking to the outside of the second discharge muffler through the tiny gap between the bolt and the first side wall portion and the second side wall portion.

[0050] Furthermore, compared with the case of using only a sealing member, it is possible to more effectively prevent the refrigerant and / or gas flowing into the second discharge muffler from leaking to the outside of the second discharge muffler through a fine gap formed between the first side wall of the second muffler body and the second side wall of the second muffler cover.

[0051] Furthermore, since the bolts are connected to the first side wall portion and the second side wall portion in the horizontal direction, it is possible to improve workability when tightening the bolts.

[0052] As another example, the second muffler body may also have a flange portion protruding outward from the first side wall portion and resting on the end of the second side wall portion, and the second muffler body and the second muffler cover may be connected to each other by bolts connected to the flange portion of the second muffler body and the second side wall portion of the second muffler cover in the up and down directions.

[0053] According to this configuration, the second muffler body and the second muffler cover can be coupled until the flange portion of the second muffler body rests on the end portion of the second side wall portion of the second muffler cover. Therefore, the coupling degree between the second muffler body and the second muffler cover can be reliably adjusted.

[0054] Furthermore, since it is not necessary to form a groove for bolt fastening in the first side wall portion of the second muffler body, the strength of the second muffler body can be well maintained.

[0055] Furthermore, the refrigerant and / or gas flowing into the second discharge muffler can be more reliably prevented from leaking to the outside of the second discharge muffler through the fine gap formed between the first side wall of the second muffler body and the second side wall of the second muffler cover.

[0056] Furthermore, since the bolts are connected to the flange portion and the second side wall portion of the second muffler body in the up-down direction, it is possible to improve workability when tightening the bolts.

[0057] As yet another example, the outer surface of the bottom of the second muffler body and the outer surface of the second side wall of the second muffler cover may also be provided with a metal plate that presses the bottom of the second muffler body and the second side wall of the second muffler cover toward each other.

[0058] According to this configuration, the flange of the second muffler body and the second side wall of the second muffler cover can be more reliably connected to each other than when the flange of the second muffler body and the second side wall of the second muffler cover are fastened only by bolts.

[0059] As yet another example, a first clip portion may be formed at an end of the first side wall portion, a second clip portion may be formed at an end of the second side wall portion, and the second muffler body and the second muffler cover may be coupled to each other by the first clip portion and the second clip portion.

[0060] According to this configuration, the second muffler body and the second muffler cover can be easily connected to each other.

[0061] Furthermore, a metal plate for pressing the second side wall portion toward the first side wall portion may be further provided on the outer surface of the second side wall portion.

[0062] According to this configuration, the first side wall of the second muffler body and the second side wall of the second muffler cover can be more reliably connected to each other than when the first side wall of the second muffler body and the second side wall of the second muffler cover are fastened only by the first clip and the second clip.

[0063] As another example, a groove may be formed on the outer surface of the first side wall portion, a protrusion inserted into the groove may be formed at the end of the second side wall portion, and the second muffler body and the second muffler cover may be combined with each other by the protrusion inserted into the groove.

[0064] According to this configuration, the second muffler body and the second muffler cover can be easily connected to each other.

[0065] Furthermore, a metal plate for pressing the second side wall portion toward the first side wall portion may be further provided on the outer surface of the second side wall portion.

[0066] According to this configuration, the connection between the first side wall of the second muffler body and the second side wall of the second muffler cover can be more reliably maintained than when the first side wall of the second muffler body and the second side wall of the second muffler cover are fastened only by the interaction of the protrusion and the groove.

[0067] As another example, the second muffler body may further include a first clip portion at an end of the first side wall portion, and the second muffler body and the second muffler cover may be coupled to each other by a metal plate that presses the bottoms of the first clip portion of the second muffler body and the second muffler cover toward each other.

[0068] Also, a sealing member may be located between the first clamping portion and the bottom portion.

[0069] According to this configuration, the connection between the second muffler body and the second muffler cover can be reliably maintained.

[0070] As another example, the second muffler body may include a first side wall portion and a bottom portion integrally formed with the first side wall portion, the second muffler cover may include a stepped bottom for coupling to a second discharge hose made of metal, and the second muffler body and the second muffler cover may be coupled to each other by pressurizing the bottom of the second muffler body and the stepped bottom of the second muffler cover toward each other with a metal plate.

[0071] And, the sealing member may be located between the bottom of the second muffler body and the stepped bottom of the second muffler cover.

[0072] According to this configuration, the connection between the second muffler body and the second muffler cover can be reliably maintained.

[0073] Effects of the Invention

[0074] According to the reciprocating compressor of the present specification, since the reciprocating compressor includes a plurality of separately configured discharge mufflers, noise of a desired frequency can be effectively reduced by adjusting the volume of each of the plurality of separately configured discharge mufflers.

[0075] Furthermore, since the discharge hose connecting the multiple separated discharge mufflers is formed of a flexible material, and the discharge hose connecting the discharge muffler at the rear end located on the discharge path of the refrigerant and / or gas and the discharge pipe is formed of a metal material, the vibration generated in the compressor body can be effectively blocked, and the connection between the discharge hose and the discharge pipe can be reliably maintained.

[0076] Effects that can be obtained in the present invention are not limited to the above-mentioned effects, and a person skilled in the art in the technical field to which the present invention belongs can clearly understand other effects that are not mentioned from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] To help understanding of the present invention, the accompanying drawings, which are a part of the detailed description, provide embodiments of the present invention, and together with the detailed description, illustrate the technical features of the present invention.

[0078] Figure 1 It is an exploded perspective view schematically showing a discharge portion of a reciprocating compressor in the related art.

[0079] Figure 2 It is a perspective view of the appearance of a reciprocating compressor according to an embodiment of the present specification.

[0080] Figure 3 It is an exploded perspective view of a reciprocating compressor according to an embodiment of the present specification.

[0081] Figure 4 It is a cross-sectional view of a reciprocating compressor according to an embodiment of the present specification.

[0082] Figure 5 This is a diagram showing a partial configuration of a reciprocating compressor according to an embodiment of the present specification.

[0083] Figure 6 It is a front perspective view showing a connection state of a muffler assembly and a discharge hose according to an embodiment of the present specification.

[0084] Figure 7 This is a rear perspective view showing a connection state between a muffler assembly and a discharge hose according to an embodiment of the present specification.

[0085] Figure 8 It is a cross-sectional view showing a coupled state of a second muffler body and a second muffler cover according to the first embodiment of the present specification.

[0086] Fig. 9 It is a cross-sectional view showing a coupled state of a second muffler body and a second muffler cover according to a second embodiment of the present specification.

[0087] Fig.10 It is a cross-sectional view showing a coupled state of a second muffler body and a second muffler cover according to a third embodiment of the present specification.

[0088] Fig.11 It is a cross-sectional view showing a coupled state of a second muffler body and a second muffler cover according to a fourth embodiment of the present specification.

[0089] Fig.12 It is a cross-sectional view showing a coupled state of a second muffler body and a second muffler cover according to a fifth embodiment of the present specification.

[0090] Fig.13 It is a cross-sectional view showing a coupled state of a second muffler body and a second muffler cover according to a sixth embodiment of the present specification.

[0091] Fig.14 It is a cross-sectional view showing a coupled state of a second muffler body and a second muffler cover according to a seventh embodiment of the present specification. DETAILED DESCRIPTION

[0092] Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings. The same or similar components are denoted by the same reference numerals regardless of the figure numbers, and repeated description thereof will be omitted.

[0093] The suffixes "component" and "portion" of the structural elements used in the following description are only given or used interchangeably for the convenience of writing the description, and they themselves do not have mutually distinguishing meanings or functions.

[0094] Furthermore, in the process of describing the embodiments disclosed in this specification, when it is determined that a detailed description of a related known technology would obscure the gist of the embodiments disclosed in this specification, the detailed description of the known technology will be omitted.

[0095] In addition, the drawings are only used to help understand the embodiments disclosed in this specification. The technical ideas disclosed in this specification are not limited to the drawings, and should be understood to include all changes, equivalents and substitutes within the ideas and technical scope of the present invention.

[0096] Terms including ordinal numbers such as first, second, etc. can be used to describe various structural elements, but these structural elements are not limited to these terms. These terms are used only to distinguish one structural element from another structural element.

[0097] When it is mentioned that a certain structural element is “coupled” or “assembled” with another structural element, it should be understood that although the structural element can be directly coupled or assembled with another structural element, other structural elements may also be present between them.

[0098] On the contrary, when it is mentioned that a certain structural element is “directly coupled to” or “directly assembled with” another structural element, it should be understood that there are no other structural elements between them.

[0099] Unless the context clearly indicates otherwise, an expression in the singular includes an expression in the plural.

[0100] In the present application, the terms "including" or "having" etc. should be understood as intending to indicate the existence of the features, numbers, steps, actions, structural elements, components or their combinations disclosed in the present specification, but not intending to pre-exclude the existence or additional possibilities of one or more other features, numbers, steps, actions, structural elements, components or their combinations.

[0101] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same or similar components are denoted by the same reference numerals regardless of the figure numbers, and repeated description thereof will be omitted.

[0102] Hereinafter, the reciprocating compressor of the present specification will be described in detail with reference to the drawings.

[0103] Figure 2 is a perspective view of a reciprocating compressor according to an embodiment of the present specification, Figure 3 is an exploded perspective view of a reciprocating compressor according to an embodiment of the present specification, Figure 4 It is a cross-sectional view of a reciprocating compressor according to an embodiment of the present specification.

[0104] Reference Figures 2 to 4 The reciprocating compressor 10 of the embodiment of the present specification includes: a sealed container 100, which forms an appearance; an electric part 200, which is arranged in the internal space of the sealed container 100 and provides a driving force; a compression part 300, which receives the driving force from the electric part 200 and compresses the refrigerant by performing a linear reciprocating motion; and a suction and discharge part 400, which sucks the refrigerant compressed by the refrigerant of the compression part 300 and discharges the refrigerant compressed by the compression part 300.

[0105] The sealed container 100 forms a sealed space inside thereof, and various components of the compressor 10 are accommodated in the sealed space. The sealed container 100 is formed of a metal material, and includes a lower sealed container 110 and an upper sealed container 160.

[0106] The lower sealed container 110 is substantially in a hemispherical shape, and together with the upper sealed container 160 forms a storage space for storing various components of the motor part 200 , the compression part 300 , the suction and discharge part 400 , and the compressor 10 .

[0107] The lower sealed container 110 may be referred to as a “compressor body”, and the upper sealed container 160 may be referred to as a “compressor cover”.

[0108] The lower sealed container 110 is provided with a suction pipe 120 , a discharge pipe 130 , a process pipe 140 , and a power supply unit (not shown).

[0109] The suction pipe 120 allows the refrigerant to flow into the sealed container 100 and is installed to penetrate the lower sealed container 110 .

[0110] The suction pipe 120 may be separately installed on the lower sealed container 110 or may be integrally formed with the lower sealed container 110 .

[0111] The discharge pipe 130 is formed of a metal material, discharges the refrigerant compressed in the sealed container 100 , and is installed to penetrate the lower sealed container 110 .

[0112] The discharge pipe 130 may be separately mounted on the lower sealed container 110 by welding, or may be integrally formed with the lower sealed container 110 .

[0113] A discharge hose of the suction and discharge unit 400 described later is connected to the discharge pipe 130 . The refrigerant flowing into the suction pipe 120 and compressed by the compressor 300 may be discharged to the discharge pipe 130 through the discharge hose of the suction and discharge unit 400 .

[0114] The process pipe 140 is a device for filling the sealed container 100 with refrigerant after sealing the inside of the sealed container 100 , and may be installed through the lower sealed container 110 together with the suction pipe 120 and the discharge pipe 130 .

[0115] The upper sealed container 160 forms a storage space together with the lower sealed container 110 and is substantially formed in a hemispherical shape like the lower sealed container 110. The upper sealed container 160 encapsulates the lower sealed container 110 on the upper side of the lower sealed container 110 to form a closed space inside.

[0116] The electric motor 200 includes stators 210 and 220 , an insulator 230 , a rotor 240 , and a rotating shaft 250 .

[0117] The stators 210 and 220 are parts that are fixed during driving of the electric part 200 , and include a stator core 210 and a stator coil 220 .

[0118] The stator core 210 may be formed of a metal material and may be formed in a substantially cylindrical shape with a hollow interior.

[0119] Also, the stator coil 220 is installed inside the stator core 210. When power is applied from the outside, the stator coil 220 generates electromagnetic force and performs electromagnetic interaction with the stator core 220 and the rotor 240. Thus, the electric part 200 can generate a driving force for the reciprocating motion of the compression part 300.

[0120] The insulator 230 is disposed between the stator core 210 and the stator coil 220 , and prevents the stator core 210 from directly contacting the stator coil 220 .

[0121] When the stator coil 220 is in direct contact with the stator core 210 , the stator coil 220 is prevented from generating electromagnetic force, which is to prevent this situation.

[0122] The insulator 230 may space the stator core 210 and the stator coil 220 apart from each other by a prescribed distance.

[0123] The rotor 240 may be rotatably disposed inside the stator coil 220 and inside the insulator 230. The rotor 240 is provided with a magnet.

[0124] When power is supplied from the outside, the rotor 240 may be rotated by electromagnetic interaction with the stator core 210 and the stator coil 220 .

[0125] The rotation force generated by the rotation of the rotor 240 serves as a driving force capable of driving the compression unit 200 .

[0126] The rotating shaft 250 may be disposed in the rotor 240, and may be installed to penetrate the rotor 240 in the up-down direction, and may rotate together with the rotor 240. In addition, the rotating shaft 250 is connected to a connecting rod 340 described later and transmits the rotational force generated in the rotor 240 to the compression unit 300.

[0127] To explain this, the rotating shaft 250 includes a base shaft 252 , a rotating plate 254 , and an eccentric shaft 256 .

[0128] The base shaft 252 is installed in the rotor 240 in an up-down direction (Z-axis direction) or a vertical direction. When the rotor 240 rotates, the base shaft 252 may rotate together with the rotor 240.

[0129] The rotating plate 254 may be disposed at one side of the base shaft 252 , and may be rotatably mounted on the rotating plate seating portion 320 of the cylinder body 310 .

[0130] The eccentric shaft 256 protrudes upward from the top surface of the rotating plate 254 .

[0131] Specifically, the eccentric shaft 256 protrudes at a position deviated from the axial center of the base shaft 252 so as to eccentrically rotate when the rotating plate 254 rotates.

[0132] The connecting rod 340 is mounted on the eccentric shaft 256. As the eccentric shaft 256 rotates eccentrically, the connecting rod 340 performs linear reciprocating motion in the front-rear direction (X-axis direction).

[0133] The compression unit 300 includes a cylinder 310 , a connecting rod 340 , a piston 350 , and a piston pin 370 .

[0134] The cylinder body 310 is disposed on the electric part 200, more specifically, on the upper side of the rotor 240 and installed inside the closed container 100. The cylinder body 310 includes a rotating plate seating portion 320 and a cylinder barrel 330.

[0135] The rotating plate seating portion 320 is formed at the lower portion of the cylinder body 310 and rotatably accommodates the rotating plate 254. The rotating plate seating portion 320 is formed with a shaft opening 322 through which the rotating shaft 250 can pass.

[0136] The cylinder 330 is provided at the front portion of the cylinder body 310 and is configured to accommodate a piston 350 described later. The piston 350 can reciprocate in the front-rear direction (X-axis direction), and a compression space C capable of compressing refrigerant is formed inside the cylinder 330 .

[0137] The cylinder 330 may be made of aluminum. As an example, the cylinder 330 may be made of aluminum or an aluminum alloy.

[0138] Due to the non-magnetic aluminum material, the magnetic flux generated by the rotor 240 is not transmitted to the cylinder 330. Therefore, it is possible to prevent the magnetic flux generated by the rotor 240 from being transmitted to the cylinder 330 and leaking to the outside of the cylinder 330.

[0139] The connecting rod 340 is a device for transmitting the driving force provided from the electric part 200 to the piston 350 , and converts the rotational motion of the rotating shaft 250 into a linear reciprocating motion.

[0140] When the rotating shaft 250 rotates, the connecting rod 340 performs linear reciprocating motion in the front-rear direction (X-axis direction). The connecting rod 340 may be formed of a sintered alloy material.

[0141] The piston 350 is a device for compressing refrigerant and is accommodated in the cylinder 330 so as to be reciprocating in the front-rear direction (X-axis direction). The piston 350 is connected to the connecting rod 340 .

[0142] The piston 350 performs linear reciprocating motion in the cylinder 330 along with the movement of the connecting rod 340. As the piston 350 reciprocates, the refrigerant flowing in from the suction pipe 120 may be compressed in the cylinder 330.

[0143] Similar to the cylinder 330 , the piston 350 may be formed of an aluminum material, for example, may be formed of aluminum or an aluminum alloy.

[0144] Therefore, it is possible to prevent the magnetic flux generated in the rotor 240 from leaking to the outside through the piston 35 .

[0145] Meanwhile, the piston 350 may be made of the same material as the cylinder 330 , thereby having almost the same thermal expansion coefficient as the cylinder 330 .

[0146] Since the thermal expansion coefficients are almost the same, when the compressor 10 is driven, in the high temperature (usually about 100° C.) internal environment of the sealed container 100, the degree of thermal deformation of the piston 350 is almost the same as that of the cylinder 330. Therefore, when the piston 350 reciprocates in the cylinder 330, interference between the piston 350 and the cylinder 330 can be prevented.

[0147] The piston pin 370 couples the piston 350 and the connecting rod 340. Specifically, the piston pin 370 penetrates the piston 350 and the connecting rod 340 in the up-down direction (Z-axis direction) to connect the piston 350 and the connecting rod 340.

[0148] The suction and discharge unit 400 includes a muffler assembly 410 , a valve assembly 480 , discharge hoses 800A and 800B, a plurality of gaskets 485 and 488 , an elastic member 490 , and a clamp 492 .

[0149] The muffler assembly 410 transfers the refrigerant sucked from the suction pipe 120 to the inside of the cylinder 330 , and delivers the refrigerant compressed in the compression space C of the cylinder 330 to the discharge pipe 130 .

[0150] To this end, the muffler assembly 410 is provided with a suction space S for accommodating the refrigerant sucked from the suction pipe 120 and a discharge space D for accommodating the refrigerant compressed in the compression space C of the cylinder 330 .

[0151] The refrigerant sucked from the suction pipe 120 flows into the suction space S of the suction and discharge tank 426 via the suction mufflers 430 and 420 described later. The refrigerant compressed in the cylinder 330 passes through the discharge space D of the suction and discharge tank 426 and the discharge muffler described later, and is discharged to the outside of the compressor 10 through the discharge hoses 800A and 800B.

[0152] The valve assembly 480 guides the refrigerant in the suction space S to the inside of the cylinder 330 or guides the refrigerant compressed in the cylinder 330 to the discharge space D.

[0153] To this end, an outlet valve 483 installed in an openable and closable manner is provided on the front side of the valve assembly 480 to discharge the refrigerant compressed in the compression space C to the outlet space D, and an intake valve 481 installed in an openable and closable manner is provided on the back side of the valve assembly 480 to discharge the refrigerant in the intake space S to the compression space C of the cylinder 330.

[0154] That is, the discharge valve 483 is provided on the front surface of the valve assembly 480 , and the suction valve 481 is provided on the rear surface of the valve assembly 420 .

[0155] The functions of the discharge valve 483 and the suction valve 481 will be briefly described.

[0156] When the refrigerant compressed in the compression space C in the cylinder 330 is discharged, the discharge valve 483 is opened and the suction valve 481 is closed. Thus, the refrigerant compressed in the cylinder 330 does not flow into the suction space S but can flow into the discharge space D.

[0157] Conversely, when the refrigerant flowing into the suction space S is sucked into the cylinder 330 , the discharge valve 483 is closed and the suction valve 481 is opened. Thus, the refrigerant in the suction space S does not flow into the discharge space D but can flow into the cylinder 330 .

[0158] The discharge hoses 800A and 800B serve as devices for transporting the compressed refrigerant contained in the discharge space D to the discharge pipe 130. The two discharge mufflers 460A and 460B are separated and independently arranged on the muffler assembly 410. The discharge hose 800A connects the two discharge mufflers 460A and 460B, and the discharge hose 800B connects the discharge muffler 460B and the discharge pipe 130.

[0159] The plurality of gaskets 485 and 488 are respectively installed on one side and the other side of the valve assembly 420 as means for preventing refrigerant leakage.

[0160] In detail, the plurality of gaskets 485 and 488 include a first gasket 485 and a second gasket 488. The first gasket 485 is installed at the front of the valve assembly 480, and the second gasket 488 is installed at the rear of the valve assembly 420.

[0161] When the compressor 10 is driven, the elastic member 490 is installed in front of the muffler assembly 410 as a member for supporting the muffler assembly 410. The elastic member 490 may include a Belleville Spring.

[0162] The clamp 492 fixes the valve assembly 480, the first gasket 485, the second gasket 488, and the elastic member 490 to the muffler assembly 410. The clamp 492 is formed substantially in a tripod shape and can be mounted on the muffler assembly 410 by a fastening mechanism such as a screw member.

[0163] Meanwhile, the compressor 10 further includes a plurality of damper members 500 , 550 , 600 , 650 and a counterweight 700 .

[0164] The plurality of damper members 500, 550, 600, 650 damp vibration of internal structures generated when the compressor 10 is driven. The plurality of damper members 500, 550, 600, 650 include a front damper 500, a rear damper 550, and a lower damper 600, 650.

[0165] The front damper 500 can buffer the vibration of the suction and discharge part 400 and is formed of a rubber material. The front damper 500 can be coupled to the front upper portion of the cylinder 310 through a fastening mechanism coupled to the clamp 492 .

[0166] The rear damper 550 buffers vibration of the compression unit 300 and is installed at the rear upper portion of the cylinder 310. The rear damper 550 may be formed of a rubber material.

[0167] The lower dampers 600 and 650 are provided in plural to buffer the vibration of the electric part 200. The plural lower dampers 600 and 650 include a front lower damper 600 and a rear lower damper 650.

[0168] The front lower damper 600 buffers vibration of the front side of the electric part 200 and is installed at the front lower side of the stator core 210. The rear lower damper 650 buffers vibration of the rear side of the electric part 200 and is installed at the rear lower side of the stator core 210.

[0169] The weight block 700 is a device for controlling rotational vibration when the rotation shaft 250 of the electric part 200 rotates, and is coupled to the eccentric shaft 256 of the rotation shaft 250 at the upper side of the connecting rod 340 .

[0170] Hereinafter, the configurations of the muffler assembly 410 and the discharge hoses 800A and 800B will be described in detail.

[0171] Figure 5 is a diagram showing a partial structure of a reciprocating compressor according to an embodiment of the present specification. Figure 6 It is a front perspective view showing a connection state of a muffler assembly and a discharge hose according to an embodiment of the present specification.

[0172] and, Figure 7 1 is a rear perspective view showing a connection state between a muffler assembly and a discharge hose according to an embodiment of the present specification. Figure 8 It is a cross-sectional view showing a coupled state of a second muffler body and a second muffler cover according to the first embodiment of the present specification.

[0173] Before describing the specific embodiments of the present specification, the features of the reciprocating compressor of the present specification are briefly described. The reciprocating compressor of the present specification includes the following features: a plurality of discharge mufflers separated from each other, a discharge hose connecting the discharge mufflers is formed of a flexible material, and the discharge hose connecting the discharge muffler located at the rear end of the discharge path of the refrigerant and / or gas and the discharge pipe is formed of a metal material.

[0174] Since the discharge portion of such a configuration may include a plurality of discharge mufflers that are separately configured, noise of a desired frequency can be effectively reduced by adjusting the volumes of the respective discharge mufflers.

[0175] Furthermore, since the discharge hose connected to the discharge muffler is formed of a flexible material, the discharge hose connecting the discharge muffler at the rear end of the discharge path of the refrigerant and / or gas and the discharge pipe is formed of a metal material, and thus the vibration generated in the compressor body can be effectively blocked, and the connection between the discharge hose and the discharge pipe can be reliably maintained.

[0176] The structures of muffler assemblies of various structures provided in the reciprocating compressors of this specification will be described.

[0177] Reference Figures 5 to 8 The muffler assembly 410 of the embodiment of the present specification includes a first assembly part 430, a second assembly part 420, a third assembly part 460A1 and a fourth assembly part 460A2.

[0178] The first assembly part 430 includes a suction hole 432 connected to the suction pipe 120. The suction hole 432 is located adjacent to the inner side of the lower sealed container 110 where the suction pipe 120 is connected. An internal pipe 450 is provided inside the first assembly part 430. As an example, the internal pipe 450 may be composed of a substantially cylindrical pipe.

[0179] A first fixing portion 441 for fixing the inner tube 450 is provided inside the first assembling portion 430. A through hole 442 corresponding to the suction hole 432 is formed in the first fixing portion 441. Therefore, in a state where the first fixing portion 441 is provided inside the first assembling portion 430, the suction hole 432 and the through hole 442 may be aligned with each other.

[0180] Furthermore, the inner tube 450 includes a first coupling portion 454 coupled to the first fixing portion 441 .

[0181] The inner tube 450 may extend upward from the first assembly part 430 and be coupled to the second assembly part 420. The second assembly part 420 includes a second fixing part coupled to the inner tube 450. Also, the inner tube 455 includes a second coupling part 455 coupled to the second fixing part.

[0182] The second assembling part 420 is coupled to an upper side of the first assembling part 430. At least a portion of the inner tube 450 may be located inside the first assembling part 430, and the remaining portion may be located inside the second assembling part 420.

[0183] When the first assembly part 430 is combined with the second assembly part 420, a suction flow path is formed inside the first assembly part 430 and the second assembly part 420, and the suction flow path enables the refrigerant sucked into the compressor 10 to flow toward the cylinder 330. Therefore, the first assembly part 430 and the second assembly part 420 can be collectively referred to as a "suction muffler".

[0184] The third assembly part 460A1 is disposed at a distance from one side of the second assembly part 420. In addition, a suction and discharge tank 426 forming the suction space S and the discharge space D is provided between the second assembly part 420 and the third assembly part 460A1.

[0185] The suction and discharge tank 426 includes a partition 427 that divides the inner space of the suction and discharge tank 426 into the suction space S and the discharge space D. In addition, the valve assembly 480 may be provided at one side of the suction and discharge tank 426 .

[0186] The suction space S may be shielded by the suction valve 481 , and the discharge space D may be shielded by the discharge valve 483 .

[0187] The fourth assembly part 460A2 is coupled to the lower side of the third assembly part 460A1. When the third assembly part 460A1 and the fourth assembly part 460A2 are coupled, a discharge flow path for the refrigerant discharged from the cylinder 330 to flow toward the discharge pipe 130 is formed inside the third assembly part 460A1 and the fourth assembly part 460A2.

[0188] Therefore, the third assembly part 460A1 and the fourth assembly part 460A2 may be collectively referred to as a "first discharge muffler".

[0189] Furthermore, the third assembly part 460A1 may be referred to as a "first muffler body" that forms the first discharge muffler, and the fourth assembly part 460A2 may be referred to as a "first muffler cover" that is combined with the first muffler body to form the first discharge muffler.

[0190] Therefore, the suction mufflers 420 and 430 and the first discharge mufflers 460A1 and 460A2 are separated from each other on both sides of the suction and discharge tank 426 via the suction and discharge tank 426 .

[0191] A plurality of partition walls for forming the internal space into a plurality of attenuation spaces may be provided in the internal space of the first discharge mufflers 460A1 and 460A2, and the number of the partition walls may be varied in various ways.

[0192] In this specification, the second discharge mufflers 460B1 and 460B2 are located below the first discharge mufflers 460A1 and 460A2.

[0193] Therefore, the reciprocating compressor of the present specification includes a discharge muffler composed of first discharge mufflers 460A1 and 460A2 and second discharge mufflers 460B1 and 460B2 that are separately configured.

[0194] In the following, an example is given in which the reciprocating compressor includes two discharge mufflers. However, the number of discharge mufflers may be further increased as required.

[0195] The second discharge muffler 460B1 , 460B2 may include a fifth assembling portion 460B1 and a sixth assembling portion 460B.

[0196] Here, the fifth assembly part 460B1 may be referred to as a “second muffler body” of the second discharge muffler, and the sixth assembly part 460B2 may be referred to as a “second muffler cover” of the second discharge muffler.

[0197] In the discharge muffler of such a configuration, the first muffler body 460A1, the first muffler cover 460A2, and the second muffler body 460B1 may be formed of plastic materials, respectively, and the second muffler cover 460B2 may be formed of a metal material.

[0198] Furthermore, the internal volumes of the first discharge mufflers 460A1 and 460A2 and the second discharge mufflers 460B1 and 460B2 may be formed in various ways so as to reduce discharge pulsation noise of a specific frequency.

[0199] As an example, the volume of the first spit mufflers 460A1 and 460A2 may be formed to be larger than the volume of the second spit mufflers 460B1 and 460B2.

[0200] The first discharge mufflers 460A1 and 460A2 and the second discharge mufflers 460B1 and 460B2 are connected by a first discharge hose 800A made of a flexible material, and the second discharge mufflers 460B1 and 460B2 and the discharge pipe 130 are connected by a second discharge hose 800B made of a metal material.

[0201] Here, the first discharge hose 800A is formed of a flexible material in order to reduce the transmission of vibration generated in the compressor body to the sealed container.

[0202] Furthermore, the second discharge hose 800B is formed of metal material in order to connect the second discharge hose 800B to the discharge pipe 130 by welding, thereby solving the problem that occurs in the reciprocating compressor of the prior art in which an O-ring is provided at the end of the discharge hose to connect the discharge hose and the discharge pipe.

[0203] Furthermore, the first discharge muffler 460A1 and 460A2 are separated into a third assembly part 460A1 made of plastic and a fourth assembly part 460A2 made of plastic so as to be able to manufacture the first discharge hose 800A and the fourth assembly part 460A2 made of flexible material by double shot molding.

[0204] According to such a configuration, the manufacturing process and / or the joining process of the first discharge muffler and the first discharge hose can be simplified.

[0205] Furthermore, the second discharge muffler 460B1 and 460B2 are separated into a fifth assembly part 460B1 made of plastic material and a sixth assembly part 460B2 made of metal material in order to be able to manufacture the first discharge hose 800A made of flexible material and the fifth assembly part 460B1 made of plastic material by double injection molding, and also to manufacture the second discharge hose 800B made of metal material and the sixth assembly part 460B2 made of metal material by double injection molding, or to combine the second discharge hose 800B made of metal material and the sixth assembly part 460B2 made of metal material by brazing.

[0206] The third assembly portion 460A1 made of plastic and the fourth assembly portion 460A2 made of plastic, which form the first discharge mufflers 460A1 and 460A2, may be joined by laser welding.

[0207] Furthermore, the fifth assembly part 460B1 made of plastic material and the sixth assembly part 460B2 made of metal material forming the second discharge mufflers 460B1 and 460B2 may be combined by physical bonding or laser welding.

[0208] Furthermore, the second discharge hose 800B may be connected to the discharge pipe 130 by welding.

[0209] According to this configuration, the second discharge muffler can be fixed and supported by the second discharge hose.

[0210] A portion of the second discharge hose 800B may be supported by the hose fixing portion 553. The hose fixing portion 553 is coupled to the rear damper 550 and is configured to clamp the second discharge hose 800B.

[0211] As an example, the hose fixing portion 553 has a clip shape and may be configured to surround at least a portion of the outer circumference of the second discharge hose 800B. The second discharge hose 800B may be guided by the hose fixing portion 553 to be located at a position spaced apart from the inner side surface of the sealed container 100.

[0212] The discharge pipe 130 penetrates the lower sealed container 110 and extends to the interior of the lower sealed container 110 . The second discharge hose 800B is directly connected to the discharge pipe 130 by welding.

[0213] In order to facilitate the connection between the discharge pipe 130 and the second discharge hose 800B, the discharge pipe 130 may penetrate the lower sealed container 110 and be bent, and may extend upward.

[0214] The discharge pipe 130 may be made of a metal material, for example, copper (Cu).

[0215] The fifth assembling part 460B1 made of plastic material and the sixth assembling part 460B2 made of metal material may be combined with each other by various methods.

[0216] For example, the fifth assembling part and the sixth assembling part may be coupled to each other by a fastening member selected from a bolt (which may include a nut), a screw, or a pin, or may be coupled to each other by a clip, or may be coupled to each other by structures that mesh with each other.

[0217] Hereinafter, the connection structure of the fifth assembly part 640B1 and the sixth assembly part 640B2 forming the second discharge mufflers 640B1 and 640B2 will be described with reference to the drawings.

[0218] Figure 8 It is a cross-sectional view showing a coupled state of the second muffler body (fifth assembling portion) and the second muffler cover (sixth assembling portion) according to the first embodiment of the present specification.

[0219] In this embodiment, the fifth assembly part 460B1 includes a first side wall portion 460B11, and the sixth assembly part 460B2 includes: a second side wall portion 460B21, for combining with the first side wall portion 460B11 of the fifth assembly part 460B1; and a bottom portion 460B22, which is integrally formed with the second side wall portion 460B21 and for combining with the second discharge hose 800B made of metal.

[0220] Furthermore, the sealing member 461 is located in at least one of a region between the first side wall portion 460B11 and the second side wall portion 460B21 and a region between the bottom portion 460B22 and an end portion of the first side wall portion 460B11 .

[0221] The sealing member may be formed of an O-ring or a gasket.

[0222] The second side wall portion 460B21 of the sixth assembling portion 460B2 may be formed to have an appropriate length capable of reliably maintaining the coupling between the fifth assembling portion 460B1 and the sixth assembling portion 460B2.

[0223] Figure 8 An example is shown in which the sealing member 461 is respectively located between the first side wall portion 460B11 and the second side wall portion 460B21 and between the bottom portion 460B22 and the end portion of the first side wall portion 460B11 .

[0224] However, the sealing member 461 may be located only between the first side wall portion 460B11 and the second side wall portion 460B21, or may be located only between the bottom portion 460B22 and the end portion of the first side wall portion 460B11.

[0225] When the fifth assembling portion 460B1 and the sixth assembling portion 460B2 are combined, a portion of the first side wall portion 460B11 is located inside the second side wall portion 460B21 .

[0226] Different from this, a portion of the second side wall portion 460B21 may also be located inside the first side wall portion 460B11.

[0227] The first side wall portion 460B11 and the second side wall portion 460B21 may be combined by bonding or ultrasonic welding.

[0228] According to this configuration, the refrigerant and / or gas flowing into the second discharge muffler can be prevented from leaking to the outside of the second discharge muffler through a fine gap formed between the first side wall of the second muffler body and the second side wall of the second muffler cover.

[0229] Furthermore, in order to increase the bonding force between the fifth assembly part 460B1 and the sixth assembly part 460B2, a metal plate 463 is further provided on the outer surface of the second side wall part 460B21 to press the second side wall part 460B21 toward the first side wall part 460B11. However, the metal plate 463 may not be provided.

[0230] Fig. 9 It is a cross-sectional view showing a coupled state of a second muffler body (fifth assembling portion) and a second muffler cover (sixth assembling portion) according to a second embodiment of the present specification.

[0231] In describing the following embodiments, Figure 8 The same components as those of the first embodiment are given the same reference numerals, and detailed description thereof is omitted.

[0232] Reference Fig. 9 The fifth assembling portion 460B1 and the sixth assembling portion 460B2 may be coupled to each other by bolts 465 coupled to the first side wall portion 460B11 and the second side wall portion 460B21 in a horizontal direction (X-axis direction and / or Y-axis direction).

[0233] When the fifth assembling part 460B1 and the sixth assembling part 460B2 are fastened using the bolt 465 , the refrigerant and / or gas flowing into the second discharge muffler can be more effectively prevented from leaking to the outside of the second discharge muffler than when only the sealing member 461 is used.

[0234] Furthermore, since the bolts 465 are connected to the first side wall portion 460B11 and the second side wall portion 460B21 in the horizontal direction, workability can be improved when tightening the bolts 465 .

[0235] At this time, a hole for bolt fastening is formed in the second side wall portion 460B21 of the sixth assembling portion 460B2, and a groove for bolt fastening is formed in the first side wall portion 460B11 of the fifth assembling portion 460B1.

[0236] Therefore, the bolt 465 completely penetrates the second side wall portion 460B21 of the sixth assembling portion 460B2 , but does not penetrate the first side wall portion 460B11 of the fifth assembling portion 460B1 .

[0237] Therefore, it is possible to prevent the refrigerant and / or gas that has flowed into the second discharge muffler from leaking to the outside of the second discharge muffler through fine gaps between the bolt 465 and the first and second side wall portions 460B11 and 460B21.

[0238] Furthermore, in order to increase the bonding force between the fifth assembly part 460B1 and the sixth assembly part 460B2, a metal plate 463 is further provided on the outer surface of the second side wall part 460B21 to press the second side wall part 460B21 toward the first side wall part 460B11. However, the metal plate 463 may not be provided.

[0239] Fig.10 It is a cross-sectional view showing a coupled state of a second muffler body (fifth assembling portion) and a second muffler cover (sixth assembling portion) according to a third embodiment of the present specification.

[0240] The fifth assembly part 460B1 has a flange part 460B12 that protrudes outward from the first side wall part 460B11 and is placed on the end of the second side wall part 460B21. The fifth assembly part 460B1 and the sixth assembly part 460B2 are connected to each other by bolts 465 that are connected to the flange part 460B12 of the fifth assembly part 460B1 and the second side wall part 460B21 of the sixth assembly part 460B2 in the up and down directions.

[0241] According to this structure, since the fifth assembling part 460B1 and the sixth assembling part 460B2 are combined until the flange part 460B12 of the fifth assembling part 460B1 is placed on the end of the second side wall part 460B21 of the sixth assembling part 460B2, the degree of combination of the fifth assembling part 460B1 and the sixth assembling part 460B2 can be reliably adjusted.

[0242] Furthermore, since there is no need to form a groove for bolt fastening in the first side wall portion 460B11 of the fifth assembling portion 460B1, the strength of the fifth assembling portion 460B1 can be well maintained.

[0243] Furthermore, it is possible to more reliably prevent the refrigerant and / or gas flowing into the second discharge muffler from leaking to the outside of the second discharge muffler.

[0244] Furthermore, since the bolts 465 are coupled to the flange portion 460B12 of the fifth assembling portion 460B1 and the second side wall portion 460B21 of the sixth assembling portion 460B2 in the up-down direction, it is possible to improve workability when tightening the bolts 465 .

[0245] Furthermore, the outer surface of the bottom 460B12 of the fifth assembling part 460B1 and the outer surface of the second side wall 460B21 of the sixth assembling part 460B2 are further provided with a metal plate 463 for pressing the bottom 460B12 of the fifth assembling part 460B1 and the second side wall 460B21 of the sixth assembling part 460B2 toward each other.

[0246] According to this structure, compared with the case where the flange portion 460B12 of the fifth assembly part 460B1 and the second side wall portion 460B21 of the sixth assembly part 460B2 are fastened only by the bolts 465, the connection between the flange portion 460B12 of the fifth assembly part 460B1 and the second side wall portion 460B21 of the sixth assembly part 460B2 can be further reliably maintained.

[0247] However, the metal plate 463 may not be provided.

[0248] Fig.11 It is a cross-sectional view showing a coupled state of a second muffler body (fifth assembling portion) and a second muffler cover (sixth assembling portion) according to a fourth embodiment of the present specification.

[0249] A first clip portion 460B13 is formed at an end of the first side wall portion 460B11 of the fifth assembling portion 460B1, and a second clip portion 460B23 is formed at an end of the second side wall portion 460B21 of the sixth assembling portion 460B2. The fifth assembling portion 460B1 and the sixth assembling portion 460B2 are coupled to each other via the first clip portion 460B13 and the second clip portion 460B23.

[0250] According to such a configuration, the fifth assembling portion 460B1 and the sixth assembling portion 460B2 can be easily connected to each other.

[0251] Furthermore, a metal plate 463 is provided on the outer surface of the second side wall portion 460B21 to press the second side wall portion 460B21 toward the first side wall portion 460B11. However, the metal plate 463 may not be provided.

[0252] According to this structure, compared with the case where the first side wall portion 460B11 of the fifth assembly part 460B1 and the second side wall portion 460B21 of the sixth assembly part 460B2 are fastened only by the first clamp portion 460B13 and the second clamp portion 460B23, the connection between the first side wall portion 460B11 of the fifth assembly part 460B1 and the second side wall portion 460B21 of the sixth assembly part 460B2 can be further reliably maintained.

[0253] Fig.12 It is a cross-sectional view showing a coupled state of a second muffler body (fifth assembling portion) and a second muffler cover (sixth assembling portion) according to a fifth embodiment of the present specification.

[0254] A groove portion 460B14 is formed on the outer surface of the first side wall portion 460B11 of the fifth assembly portion 460B1, and a protrusion 460B24 inserted into the groove portion 460B14 is formed at the end of the second side wall portion 460B21 of the sixth assembly portion 460B2. The fifth assembly portion 460B1 and the sixth assembly portion 460B2 are connected to each other by the protrusion 460B24 inserted into the groove portion 460B14.

[0255] According to such a configuration, the fifth assembling portion 460B1 and the sixth assembling portion 460B2 can be easily connected to each other.

[0256] Furthermore, a metal plate 463 for pressing the second side wall portion 460B21 toward the first side wall portion 460B11 is further provided on the outer surface of the second side wall portion 460B21 .

[0257] According to this structure, compared with the case where the first side wall portion 460B11 of the fifth assembly part 460B1 and the second side wall portion 460B21 of the sixth assembly part 460B2 are fastened only by the interaction of the protrusion 460B24 and the groove portion 460B14, the connection between the first side wall portion 460B11 of the fifth assembly part 460B1 and the second side wall portion 460B21 of the sixth assembly part 460B2 can be further reliably maintained.

[0258] However, the metal plate 463 may not be provided.

[0259] Fig.13 It is a cross-sectional view showing a coupled state of a second muffler body (fifth assembling portion) and a second muffler cover (sixth assembling portion) according to a sixth embodiment of the present specification.

[0260] The fifth assembly part 460B1 further includes a first clip portion 460B13 at the end of the first side wall portion 460B11, and the fifth assembly part 460B1 and the sixth assembly part 460B2 are coupled to each other by a metal plate 463 that presses the first clip portion 460B13 of the fifth assembly part 460B1 and the bottom 460B22 of the sixth assembly part 460B2 toward each other.

[0261] Also, the sealing member 461 may be located between the first clamping portion 460B13 and the bottom portion 460B22 .

[0262] According to this configuration, the connection between the fifth assembling portion 460B1 and the sixth assembling portion 460B2 can be reliably maintained.

[0263] Fig.14 It is a cross-sectional view showing a coupled state of a second muffler body (fifth assembling portion) and a second muffler cover (sixth assembling portion) according to a seventh embodiment of the present specification.

[0264] The fifth assembly portion 460B1 includes a first side wall portion 460B11 and a bottom portion 460B12 formed integrally with the first side wall portion, and the sixth assembly portion 460B2 includes a stepped bottom portion 460B221 to which the second discharge hose 800B made of metal is coupled.

[0265] And, the fifth assembling portion 460B1 and the sixth assembling portion 460B2 are coupled to each other through the metal plate 463 which presses the bottom 460B12 of the fifth assembling portion 460B1 and the stepped bottom 460B221 of the sixth assembling portion 460B toward each other.

[0266] Also, the sealing member 461 may be located between the bottom portion 460B12 of the fifth assembling portion 460B1 and the stepped bottom portion B221 of the sixth assembling portion 460B2 .

[0267] According to this configuration, the connection between the fifth assembling portion 460B1 and the sixth assembling portion 460B2 can be reliably maintained.

[0268] The present invention can be embodied in other specific forms within the scope of the essential features of the present invention, which is self-evident to those skilled in the art. Therefore, the above detailed description should not be interpreted as restrictive in all aspects, but should be considered as exemplary. The scope of the present invention should be determined according to the reasonable interpretation of the attached claims, and all changes made within the equivalent scope of the present invention are included in the scope of the present invention.

Claims

1. A reciprocating compressor, wherein: include: Sealed container to form a closed space; A metal discharge pipe is combined with a sealed container; The electric part has a stator and a rotor, is disposed inside the sealed container and generates a rotational force; A compression part having a connecting rod for converting the rotational force of the electric part into a linear driving force, a piston connected to the connecting rod, and a cylinder into which the piston is movably inserted, and compressing a refrigerant; as well as a discharge portion for discharging the refrigerant compressed in the compression portion; The discharging portion comprises: At least two spit silencers, constructed separately; A first discharge hose connected to adjacent discharge mufflers; and A second discharge hose connects the discharge muffler located at the rear end of the gas discharge path to the discharge pipe; The first discharge hose is made of a flexible material. The second discharge hose is made of metal.

2. The reciprocating compressor according to claim 1, wherein: The at least two spit silencers include: A first discharge muffler includes a first muffler body and a first muffler cover coupled to the first muffler body; and A second discharge muffler having a second muffler body and a second muffler cover coupled to the second muffler body; The first discharge hose connects the first discharge muffler and the second discharge muffler, and the second discharge hose connects the second discharge muffler and the discharge pipe.

3. The reciprocating compressor according to claim 2, wherein: The first muffler body, the first muffler cover and the second muffler body are respectively formed of plastic materials, and the second muffler cover is formed of metal materials.

4. The reciprocating compressor according to claim 3, wherein: The second discharge hose made of metal and the second muffler cover made of metal are brazed and welded to each other or double-injection-molded to each other. The second discharge hose made of metal and the discharge pipe made of metal are welded to each other.

5. The reciprocating compressor according to claim 3, wherein: The first muffler body and the first muffler cover are laser welded to each other, The first discharge hose made of flexible material is respectively double-injected with the first muffler cover and the second muffler body.

6. The reciprocating compressor according to any one of claims 2 to 5, wherein: The second muffler body includes a first side wall portion, The second muffler cover includes a second side wall portion to which the first side wall portion of the second muffler body is coupled, and a bottom portion which is integrally formed with the second side wall portion and to which the second discharge hose made of metal is coupled.

7. The reciprocating compressor according to claim 6, wherein: The sealing member is located in at least one of a region between the first side wall portion and the second side wall portion and a region between the bottom portion and an end portion of the first side wall portion.

8. The reciprocating compressor according to claim 7, wherein: A portion of the first side wall portion is located inside the second side wall portion, The second muffler body and the second muffler cover are coupled to each other by bolts coupled to the first side wall portion and the second side wall portion in a horizontal direction.

9. The reciprocating compressor according to claim 8, wherein: A metal plate for pressing the second side wall portion toward the first side wall portion is provided on an outer surface of the second side wall portion.

10. The reciprocating compressor according to claim 8, wherein: The second muffler body further includes a flange portion protruding outward from the first side wall portion and resting on an end portion of the second side wall portion. The second muffler body and the second muffler cover are coupled to each other by bolts coupled to a flange portion of the second muffler body and a second side wall portion of the second muffler cover in a vertical direction.

11. The reciprocating compressor according to claim 10, wherein: The outer surface of the flange portion of the second muffler body and the outer surface of the second side wall portion of the second muffler cover are provided with a metal plate that presses the flange portion of the second muffler body and the second side wall portion of the second muffler cover toward each other.

12. The reciprocating compressor according to claim 8, wherein: A first clamping portion is formed at an end of the first side wall portion, and a second clamping portion is formed at an end of the second side wall portion. The second muffler body and the second muffler cover are coupled to each other by the first clamping portion and the second clamping portion.

13. The reciprocating compressor according to claim 12, wherein: A metal plate for pressing the second side wall portion toward the first side wall portion is provided on an outer surface of the second side wall portion.

14. The reciprocating compressor according to claim 8, wherein: A groove is formed on the outer surface of the first side wall, and a protrusion inserted into the groove is formed at the end of the second side wall. The second muffler body and the second muffler cover are coupled to each other by the protrusion inserted into the groove.

15. The reciprocating compressor according to claim 14, wherein: A metal plate for pressing the second side wall portion toward the first side wall portion is provided on an outer surface of the second side wall portion.

16. The reciprocating compressor according to claim 6, wherein: The second muffler body further includes a first clamping portion located at an end portion of the first side wall portion. The second muffler body and the second muffler cover are bonded to each other by a metal plate that presses the first clamp portion of the second muffler body and the bottom portion of the second muffler cover toward each other. A sealing member is located between the first clamp portion of the second muffler body and the bottom portion of the second muffler cover.

17. The reciprocating compressor according to any one of claims 2 to 5, wherein: The second muffler body includes a first side wall portion and a bottom portion formed integrally with the first side wall portion. The second muffler cover includes a stepped bottom for coupling the second discharge hose made of metal. The second muffler body and the second muffler cover are bonded to each other by a metal plate that presses the bottom of the second muffler body and the stepped bottom of the second muffler cover toward each other. A sealing member is located between the bottom of the second muffler body and the stepped bottom of the second muffler cover.

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