Reciprocating compressor

Abstract

A reciprocating compressor is disclosed. In the reciprocating compressor, a suction muffler includes a plurality of suction passages, and the plurality of suction passages can communicate with mutually different muffling spaces. Thus, a portion of suction refrigerant is rapidly sucked into a compression chamber via a suction passage having low flow resistance, so that it is possible to increase the suction speed of the refrigerant while suppressing overheating of the suction refrigerant inside the suction muffler, and in turn, it is possible to increase the overall suction amount of the refrigerant while improving the compressor performance.

Description

Technical Field

[0001] This invention relates to a reciprocating compressor. Background Technology

[0002] A reciprocating compressor draws in, compresses, and discharges refrigerant by reciprocating the piston within a cylinder. Reciprocating compressors can be categorized into continuous reciprocating compressors and vibrating reciprocating compressors based on the piston's driving mechanism.

[0003] A connected reciprocating compressor is a type of compressor in which a piston reciprocates within a cylinder via a crankshaft and connecting rod connected to a rotary motor. A vibratory reciprocating compressor is a type of compressor in which a piston reciprocates within a cylinder via a movable part connected to a reciprocating motor. This invention relates to a connected reciprocating compressor. Hereinafter, a reciprocating compressor can be understood as a connected reciprocating compressor.

[0004] A suction muffler can be installed on the suction side of the reciprocating compressor to attenuate flow noise and / or pressure pulsations generated during refrigerant intake. Thus, after the refrigerant flows into the interior of the housing via the suction pipe connected to the housing, vibration and noise are reduced as it passes through the suction muffler.

[0005] Intake silencers can be broadly categorized into direct intake and indirect intake types based on their connection to the intake pipe. Direct intake silencers connect the intake pipe directly to the silencer, while indirect intake silencers connect them separately. Direct intake silencers draw the refrigerant directly into the silencer without passing through the internal space of the casing, thus suppressing refrigerant heating and reducing intake losses. However, this may increase pressure pulsations caused by refrigerant vibration. Indirect intake silencers reduce pressure pulsations by attenuating refrigerant vibration, but the refrigerant may be heated inside the casing, potentially causing intake losses.

[0006] Besides direct and indirect intake methods, intake mufflers can also include proximity intake methods. Proximity intake involves inserting the intake pipe into the intake muffler, but with a small gap between the pipe and the muffler. Proximity intake methods can attenuate the pulsating pressure generated in direct intake methods and suppress the heating of the intake refrigerant that occurs in indirect intake methods. Considering that the intake pipe is inserted inside the muffler, this proximity intake method can be understood as a type of direct intake method.

[0007] In the existing intake muffler as described above, the interior of the intake muffler through which the intake refrigerant passes is formed as a complex flow path and / or space to reduce the vibration and / or noise of the intake refrigerant drawn into the cylinder via the intake muffler.

[0008] However, as mentioned above, due to the complex flow path and / or space within existing intake mufflers, flow resistance is excessively increased, potentially reducing the flow rate of the intake refrigerant. Furthermore, as the intake refrigerant remains inside the intake muffler, it is heated by the heat inside the casing, which may cause an increase in temperature or density. Therefore, intake losses due to the intake muffler may occur, leading to reduced compressor performance. Summary of the Invention

[0009] The problem that the invention aims to solve

[0010] The purpose of this invention is to provide a reciprocating compressor that can increase the amount of refrigerant drawn into the compression chamber per unit time via the intake muffler.

[0011] Another object of the present invention is to provide a reciprocating compressor that can increase the amount of refrigerant drawn into the compression chamber per unit time by reducing the flow resistance in the intake muffler.

[0012] Another object of the present invention is to provide a reciprocating compressor that can increase the amount of refrigerant drawn into the compression chamber per unit time by suppressing the overheating of the refrigerant passing through the intake muffler.

[0013] Another object of the present invention is to provide a reciprocating compressor that can both increase the amount of refrigerant drawn into the compression chamber per unit time and reduce the pressure pulsation of the refrigerant passing through the intake muffler.

[0014] Another object of the present invention is to provide a reciprocating compressor that can both increase the amount of refrigerant drawn into the compression chamber per unit time and improve the noise attenuation effect of the intake muffler.

[0015] Another object of the present invention is to provide a reciprocating compressor that can increase the refrigerant intake capacity while reducing the manufacturing cost of the intake muffler by simplifying its appearance, and can form the intake muffler as large as possible or achieve miniaturization of the compressor.

[0016] Another object of the present invention is to provide a reciprocating compressor that can further increase the refrigerant intake by rapidly guiding the refrigerant drawn into the internal space of the housing into the interior of the intake muffler while reducing the flow resistance inside the intake muffler.

[0017] Technical solutions to the problem

[0018] To achieve the objectives of this invention, a reciprocating compressor comprising a housing, a cylinder, a piston, a suction pipe, and a suction muffler can be provided. The cylinder can be disposed within the internal space of the housing. The piston can be configured to reciprocate within the cylinder to form a compression section. The suction pipe can penetrate and connect to the housing. The suction muffler can have a muffler inlet, a muffler outlet, a silencing space, and a suction channel. The muffler inlet opens toward the suction pipe, the muffler outlet is spaced apart from the muffler inlet and opens toward the cylinder, at least one silencing space is disposed between the muffler inlet and the muffler outlet, and the suction channel guides refrigerant flowing in through the muffler inlet toward the muffler outlet. The suction channel can be composed of a plurality of suction channels, each having a different flow resistance. Thus, a portion of the refrigerant is rapidly drawn into the compression chamber via the suction channel with low flow resistance, thereby increasing the refrigerant intake velocity while suppressing overheating of the refrigerant inside the suction muffler, thereby improving compressor performance while increasing the overall refrigerant intake volume.

[0019] As an example, the outlets of the plurality of said inhalation channels may be connected to different anechoic spaces.

[0020] As another example, the plurality of said inhalation channels can be formed such that at least a portion of them have different cross-sectional areas.

[0021] For example, a plurality of the aforementioned suction channels can be configured with different inlet side cross-sectional areas based on the refrigerant suction path.

[0022] Specifically, among the plurality of suction channels, based on the refrigerant suction path, the inlet cross-sectional area of ​​the suction channel communicating with the downstream anechoic space can be smaller than the inlet cross-sectional area of ​​the suction channel communicating with the upstream anechoic space.

[0023] As another example, the intake muffler may include: a muffler body portion having at least one of the silencing spaces; and a muffler fixing portion extending from one side of the muffler body portion and fixed to the compression portion. The muffler inlet may be formed through the muffler body portion.

[0024] For example, the plurality of said inhalation channels may include: a first inhalation channel; and a second inhalation channel disposed on one side of the first inhalation channel, the outlet of the second inhalation channel being connected to an anechoic space further downstream than the anechoic space connected to the outlet of the first inhalation channel. The inlets of the first inhalation channel and the inlets of the second inhalation channel may be connected to the same anechoic space.

[0025] Specifically, the inlet of the second suction channel can be located upstream of the inlet of the first suction channel, based on the refrigerant's suction path.

[0026] Additionally, the plurality of said inhalation channels may include: a first inhalation channel; and a second inhalation channel disposed on one side of the first inhalation channel, the outlet of the second inhalation channel communicating with an anechoic space further downstream than the anechoic space communicating with the outlet of the first inhalation channel. The first inhalation channel and the second inhalation channel may be formed inside the inhalation silencer.

[0027] For example, a channel forming portion protruding toward the silencing space can be formed on the inner peripheral surface of the intake muffler. A plurality of intake channels can be formed by penetrating the interior of the channel forming portion.

[0028] In addition, at least one of the plurality of said inhalation channels may be formed outside the inhalation muffler.

[0029] For example, the plurality of said intake channels may include: a first intake channel; and a second intake channel disposed on one side of the first intake channel, the outlet of the second intake channel communicating with an anechoic space further downstream than the anechoic space communicating with the outlet of the first intake channel. The second intake channel may be formed on the outer peripheral surface of the intake silencer.

[0030] Specifically, a connecting channel can be formed on the outer peripheral surface of the inhalation muffler, with both ends of the connecting channel recessed into the silencing space by a predetermined depth, and an inlet and an outlet formed on both sides of the connecting channel. The second inhalation channel can be formed using a connecting member inserted into the connecting channel and covering the inlet and outlet, or it can be formed using a connecting member with its two ends respectively connected to the inlet and the outlet.

[0031] Additionally, the plurality of said intake channels may include: a first intake channel; and a second intake channel disposed on one side of the first intake channel, the outlet of the second intake channel communicating with an anechoic space further downstream than the anechoic space communicating with the outlet of the first intake channel. The second intake channel may be formed through the interior of a connecting member separated from the outer peripheral surface of the muffler body.

[0032] Specifically, the inlet connected to one end of the connecting member and the outlet connected to the other end of the connecting member can respectively penetrate the muffler body to communicate with different silencing spaces.

[0033] Specifically, the inlet portion connected to one end of the connecting member can penetrate the muffler body to communicate with the silencing space. The outlet portion connected to the other end of the connecting member can penetrate the muffler fixing portion to communicate with the muffler outlet.

[0034] Additionally, an inhalation guide is incorporated at the muffler inlet, the inhalation guide having a plurality of separate guide channels that communicate with the plurality of inhalation channels.

[0035] For example, the plurality of guide channels may include: a first guide channel; and a second guide channel disposed on one side of the first guide channel. The first guide channel and the second guide channel may communicate with the plurality of inhalation channels in the same anechoic space.

[0036] Specifically, the plurality of said inhalation channels may include: a first inhalation channel; and a second inhalation channel disposed on one side of the first inhalation channel, the outlet of the second inhalation channel being connected to an anechoic space downstream of the anechoic space connected to the outlet of the first inhalation channel. The second guide channel may be configured to be closer to the second inhalation channel than the first inhalation channel.

[0037] Specifically, the plurality of guide channels may include: a first guide channel; and a second guide channel disposed on one side of the first guide channel; the first guide channel and the second guide channel may each be individually connected to the plurality of inhalation channels.

[0038] For example, the plurality of said inhalation channels may include: a first inhalation channel; and a second inhalation channel disposed on one side of the first inhalation channel, the outlet of the second inhalation channel being connected to an anechoic space downstream of the anechoic space connected to the outlet of the first inhalation channel. The first guide channel may be connected to the first inhalation channel through at least one anechoic space, and the second guide channel may be directly connected to the second inhalation channel.

[0039] In another embodiment, the inhalation muffler may include a muffler body, a muffler fixing portion, and a muffler extension. The muffler body may have at least one of the silencing spaces. The muffler fixing portion extends from the muffler body and is fixed to the compression portion. The muffler extension extends from the outer peripheral surface of the muffler body and may have the muffler inlet formed on one side thereon. A plurality of the inhalation channels may penetrate the interior of the muffler extension and communicate with the muffler inlets.

[0040] For example, at least a portion of the muffler extension may extend from and interlock with a plurality of covers constituting the muffler body. The plurality of intake channels may be separable from each other within the muffler extension.

[0041] Specifically, the plurality of suction channels may include: a first suction channel; and a second suction channel disposed on one side of the first suction channel, the outlet of the second suction channel communicating with an anechoic space further downstream than the anechoic space communicating with the outlet of the first suction channel. The second suction channel may be formed between two side extensions extending from the plurality of covers respectively.

[0042] More specifically, the second intake channel may have different cross-sectional areas along the intake path of the refrigerant.

[0043] In addition, at least a portion of the cross-sectional area of ​​the second inhalation channel may be larger than the cross-sectional area of ​​the first inhalation channel.

[0044] In addition, the muffler extensions may be formed in a plurality of separate portions, and the plurality of intake channels may be formed by penetrating the interior of the plurality of muffler extensions one-to-one.

[0045] Specifically, at least one of the plurality of muffler extensions may be integrally formed from any one of the plurality of covers constituting the muffler body.

[0046] Specifically, at least one of the plurality of muffler extensions can be formed by subsequently assembling it into any one of the plurality of covers constituting the muffler body.

[0047] Additionally, the plurality of said intake channels may include: a first intake channel; and a second intake channel disposed on one side of the first intake channel, the outlet of the second intake channel communicating with an anechoic space downstream of the anechoic space communicating with the outlet of the first intake channel. An intermediate opening may be formed between the inlet and outlet of the first intake channel, penetrating between the interior and exterior of the first intake channel. This intermediate opening may communicate with an anechoic space upstream of the anechoic space communicating with the outlet of the second intake channel, based on the refrigerant intake path.

[0048] For example, the first intake passage may include: an inlet-side passage portion opening toward the muffler inlet; and an outlet-side passage portion opening toward the muffler outlet. The intermediate opening may be formed by separating at least a portion between the inlet-side passage portion and the outlet-side passage portion.

[0049] In another embodiment, the inhalation tube may communicate with the internal space of the housing. The muffler inlet may be separated from the inhalation tube and communicate with the internal space of the housing.

[0050] As another example, the suction pipe may penetrate the housing and be inserted into the muffler inlet. At least one of the plurality of suction channels may be aligned with the outlet of the suction pipe, or may be positioned downstream of the outlet of the suction pipe, based on the refrigerant suction path.

[0051] Invention Effects

[0052] In the reciprocating compressor of the present invention, the suction muffler includes a plurality of suction channels, and the plurality of suction channels can communicate with different silencing spaces. Thus, a portion of the refrigerant is rapidly drawn into the compression chamber via the suction channels with low flow resistance, thereby increasing the refrigerant intake velocity while suppressing overheating of the refrigerant inside the suction muffler, thereby improving compressor performance while increasing the overall refrigerant intake volume.

[0053] In the reciprocating compressor of the present invention, the suction silencer includes a plurality of suction channels, and a portion of the suction channels allows the intake refrigerant to pass through a few silencer spaces, while another portion of the suction channels allows the intake refrigerant to pass through a plurality of silencer spaces sequentially. Thus, while increasing the amount of refrigerant drawn into the compression chamber, it is also possible to effectively attenuate pressure pulsations and / or intake noise of the refrigerant passing through the suction silencer.

[0054] In the reciprocating compressor of the present invention, the suction muffler includes a plurality of suction channels, and the plurality of suction channels can be formed inside the muffler body constituting the suction muffler. Therefore, while increasing the refrigerant intake capacity, the manufacturing cost of the suction muffler can be reduced by simplifying its appearance, and by minimizing interference between the suction muffler and other components, the suction muffler can be formed to the largest possible size or the compressor can be miniaturized.

[0055] In the reciprocating compressor of the present invention, the suction muffler includes a plurality of suction channels, and the plurality of suction channels can extend long toward the suction pipe. Thus, by reducing the flow resistance inside the suction muffler and guiding the refrigerant drawn into the interior space of the housing into the interior of the suction muffler before it overheats, the refrigerant intake can be further increased. Attached Figure Description

[0056] Figure 1 This is a perspective view showing the outer casing and interior of the reciprocating compressor of this embodiment.

[0057] Figure 2 It is shown Figure 1 A cross-sectional view of the interior of a reciprocating compressor.

[0058] Figure 3 This is a perspective view showing the assembly of the inhalation muffler of this embodiment.

[0059] Figure 4 It is Figure 3 An exploded view of the intake muffler shown in a three-dimensional diagram.

[0060] Figure 5 This is a perspective view showing the main inhalation channel cut open from the inhalation muffler of this embodiment.

[0061] Figure 6 yes Figure 5 The main view.

[0062] Figure 7 This is a perspective view showing the inhalation muffler of this embodiment cut open and revealing the secondary inhalation channel.

[0063] Figure 8 yes Figure 7 The main view.

[0064] Figure 9 yes Figure 8 Sectional view along line "Ⅸ-Ⅸ".

[0065] Figure 10 This is a perspective view showing an exploded view of another embodiment of the inhalation channel.

[0066] Figure 11 In order to explain Figure 10 A cross-sectional view showing the inhalation channel.

[0067] Figure 12 This is a perspective view showing an exploded view of another embodiment of the inhalation channel.

[0068] Figure 13 In order to explain Figure 12 A cross-sectional view showing the inhalation channel.

[0069] Figure 14 This is a cross-sectional view shown to illustrate another embodiment of the inhalation channel.

[0070] Figure 15 This is a cross-sectional view shown to illustrate another embodiment of the inhalation channel.

[0071] Figure 16 This is a perspective view showing an exploded view of another embodiment of the muffler inlet.

[0072] Figure 17 It is Figure 16The muffler inlet assembly is shown in a cross-sectional view.

[0073] Figure 18 This is a cross-sectional view showing another embodiment of the muffler inlet assembled.

[0074] Figure 19 This is a perspective view showing another embodiment of an intake muffler.

[0075] Figure 20 It is Figure 19 An exploded view of the intake muffler, shown in three-dimensional form.

[0076] Figure 21 It is Figure 20 The intake muffler assembly is shown in cross-section.

[0077] Figure 22 This is a perspective view showing another embodiment of an intake muffler.

[0078] Figure 23 It is Figure 22 The intake muffler assembly is shown in cross-section.

[0079] Figure 24 It is shown Figure 23 A cross-sectional view of another embodiment of the intake passage in an intake muffler. Detailed Implementation

[0080] The reciprocating compressor of the present invention will now be described in detail based on an embodiment shown in the accompanying drawings. In this specification, even in different embodiments, the same or similar reference numerals are used for the same or similar constituent elements, and the first description is used instead of the subsequent description.

[0081] Unless otherwise expressly stated in the context, the singular expressions used in this specification may also include plural expressions. Furthermore, in describing the embodiments disclosed in this specification, detailed descriptions of related well-known technologies are omitted if they are deemed to obscure the essence of the embodiments disclosed herein.

[0082] Additionally, it should be noted that the accompanying drawings are only for the purpose of facilitating the understanding of the embodiments disclosed in this specification, and should not be construed as limiting the technical concepts disclosed in this specification to the drawings.

[0083] In addition, in the following description, with the piston as the center, the compression chamber side is defined as the front and the opposite side is defined as the rear. With the crankshaft axis as the reference, the lower housing side is defined as the axial lower side and the upper housing side is defined as the axial upper side.

[0084] In addition, in the following description, the upstream and downstream are defined with the refrigerant intake path as the center, the muffler inlet side is defined as upstream, and the muffler outlet side is defined as downstream.

[0085] Furthermore, the following explanation will focus on reciprocating compressors with an indirect intake method where the intake pipe is separated from the intake muffler and communicates with the interior of the casing. However, this applies not only to direct intake methods where the intake pipe is directly connected to the intake muffler, but also to near-intake methods.

[0086] Figure 1 This is a perspective view showing the outer casing and interior of the reciprocating compressor of this embodiment. Figure 2 It is shown Figure 1 A cross-sectional view of the interior of a reciprocating compressor.

[0087] Reference Figure 1 and Figure 2 The reciprocating compressor of this embodiment may include a housing 110, an electric motor 120 disposed in the internal space 110a of the housing 110 and providing driving force, a compression unit 130 receiving driving force from the electric motor 120 to compress refrigerant, and a suction and discharge unit 140 guiding refrigerant into the compression chamber 130a and discharging the compressed refrigerant. It can be understood that the housing 110 forms the appearance of the compressor, and the electric motor 120, the compression unit 130, and the suction and discharge unit 140 constitute the compressor body C.

[0088] The housing 110 may include a lower housing 111 and an upper housing 112. The lower housing 111 and the upper housing 112 may be combined to form a sealed internal space 110a. The internal space 110a of the housing 110 may accommodate the electric motor 120 and the compression motor 130. The housing 110 may be made of a lightweight aluminum alloy (hereinafter simply referred to as aluminum) with high thermal conductivity.

[0089] The lower outer shell 111 can be formed into a roughly hemispherical shape. A suction pipe 115, a discharge pipe 116, and an oil pipe (not shown) can be respectively connected through the lower outer shell 111. These suction pipes 115, discharge pipes 116, and oil pipes can be connected to the lower outer shell 111 by insert die casting process.

[0090] The upper outer shell 112 can be formed in a generally hemispherical shape, like the lower outer shell 111. The upper outer shell 112 can be joined to the lower outer shell 111 on the upper side to form the aforementioned internal space 110a of the outer shell 110.

[0091] Reference Figure 1 and Figure 2In this embodiment, the electric unit (or drive motor) 120 may include a stator 121 and a rotor 122. The stator 121 may be elastically supported on the inner space 110a of the outer casing 110, that is, the bottom surface of the lower outer casing 111, and the rotor 122 may be rotatably disposed on the inner side of the stator 121.

[0092] The stator 121 may include a stator core 1211 and a stator coil 1212.

[0093] The stator core 1211 is made of metal materials such as electrical steel plate. If a voltage is applied to the electric motor 120 from the outside, the stator core 1211, together with the stator coil 1212 and the rotor 122 described later, performs electromagnetic interaction caused by electromagnetic force.

[0094] The stator core 1211 is formed in a generally quadrilateral cylindrical shape. For example, the inner circumferential surface of the stator core 1211 can be formed as a circle, while its outer circumferential surface can be formed as a quadrilateral shape. The stator core 1211 can be fixed to the bottom surface of the cylinder block 131 described later using stator fastening bolts (not shown).

[0095] With the stator core 1211 and the inner surface of the housing 110 separated axially and radially, the lower end of the stator core 1211 can be elastically supported on the bottom surface of the housing 110 by a support spring 123. This can suppress the direct transmission of vibrations generated during operation to the housing 110.

[0096] The stator coil 1212 can be wound inside the stator core 1211. As described above, if a voltage is received from the outside, the stator coil 1212 generates an electromagnetic force and performs an electromagnetic interaction with the stator core 1211 and the rotor 122. As a result, the electric motor 120 generates a driving force for reciprocating the compression unit 130.

[0097] The rotor 122 may include a rotor core 1221 and a magnet 1222.

[0098] Similar to the stator core 1211, the rotor core 1221 can be made of metal materials such as electrical steel sheet and can be formed into a generally cylindrical shape. A crankshaft 125 can be pressed into the center of the rotor core 1221. An eccentric portion 1251 can be eccentrically formed at one end of the crankshaft 125, and one end of the connecting rod 126 can be rotatably connected to the eccentric portion 1251. The other end of the connecting rod 126 can be rotatably connected to the piston 132, which will be described later. Thus, when the rotor core 1221 rotates, the crankshaft 125 rotates together, and the rotational force of the electric motor 120 is transmitted to the piston 132 through the connecting rod 126 connected to the eccentric portion 1251 of the crankshaft 125.

[0099] Magnets 1222 can be formed of permanent magnets and can be inserted into rotor core 1221 at equal intervals along the circumferential direction of rotor core 1221. Thus, when a voltage is applied, rotor 122 rotates through electromagnetic interaction with stator core 1211 and stator coils 1212.

[0100] Reference Figure 1 and Figure 2 In this embodiment, the compression section 130 may include a cylinder block 131 and a piston 132. The cylinder block 131 is elastically supported on the housing 110, and the piston 132 is connected to the crankshaft 125 via a connecting rod 126 and moves relative to the cylinder block 131.

[0101] The cylinder block 131 can be disposed on one axial side of the electric motor 120, such as the upper side. The cylinder block 131 can be fastened to the stator 121 by means of stator fastening bolts (not shown), and can be elastically supported together with the stator 121 of the electric motor 120 on the lower housing 111.

[0102] The cylinder block 131 may include a frame portion 1311, a fixing protrusion 1312, a bearing portion 1313, and a cylinder portion (hereinafter simply referred to as cylinder) 1314. The frame portion 1311 is the part that constitutes the body of the cylinder block 131, the fixing protrusion 1312 is the part that is connected to the stator 121 of the electric unit 120, the bearing portion 1313 is the part that supports the crankshaft 125, and the cylinder 1314 is the part in which the piston 132 is slidably inserted to form a compression space V.

[0103] The frame portion 1311 can be formed into a laterally extending flat plate shape, or a portion of its edge (excluding the corners) can be processed to reduce weight and form a radial plate shape. Thus, the frame portion 1311 is disposed above the electric motor portion 120, thereby allowing the electric motor portion 120 and the compression portion 130 to be separated.

[0104] A fixing protrusion 1312 may be formed on the edge of the frame portion 1311. For example, the fixing protrusion 1312 may be formed by protruding downward from the edge of the frame portion 1311 toward the electric motor portion 120. As a result, the cylinder block 131 may be bolted to the stator 121 and may be elastically supported together with the stator 121 of the electric motor portion 120 on the lower housing 111.

[0105] The bearing portion 1313 can be formed by extending axially to both sides from the center portion of the frame portion 1311. A bearing hole 1313a can be formed through the bearing portion 1313 axially so that the crankshaft 125 can pass through. Thus, the shaft portion 1251 of the crankshaft 125 can be inserted into the bearing portion 1313 and radially supported, and the plate portion 1253 of the crankshaft 125 can be placed on the upper end of the bearing portion 1313 and axially supported.

[0106] The cylinder 1314 can be formed radially eccentrically on one side edge of the frame portion 1311. The cylinder 1314 can be radially penetrated, with a piston 132 connected to the connecting rod 126 inserted into the inner open end, and a valve assembly 141 constituting the intake and exhaust portion 140 described later mounted on the outer open end. Thus, the piston 132 can be inserted linearly and reciprocally inside the cylinder 1314, thereby forming a compression chamber 130a.

[0107] In this embodiment, the piston 132 can be formed with an opening on one side (rear side) facing the connecting rod 126, while its opposite side, i.e., the front side facing away from the connecting rod 126, is blocked. Thus, the connecting rod 126 can be inserted into the rear side of the piston 132 and rotatably engaged, while the front side of the piston 132 is formed into a blocked shape, allowing it to form a compression chamber 130a inside the cylinder 1314 together with the valve assembly 141 described later.

[0108] Furthermore, the piston 132 can be formed of the same material as the cylinder block 131, such as an aluminum alloy. As a result, the transmission of magnetic flux from the rotor 122 to the piston 132 can be suppressed, and since the cylinder block (specifically, the cylinder) 131 and the piston 132 have the same coefficient of thermal expansion, interference between the cylinder block 131 and the piston 132 caused by thermal expansion can be suppressed.

[0109] The intake and exhaust section 140 of this embodiment may include a valve assembly 141, an intake muffler 142, and an exhaust muffler 143. The valve assembly 141 is a component for opening and closing the compression chamber 130a of the cylinder block 131, the intake muffler 142 is a component for reducing the intake noise of the refrigerant drawn into the compression chamber 130a, and the exhaust muffler 143 is a component for reducing the exhaust noise of the refrigerant discharged from the compression chamber 130a.

[0110] Valve assembly 141 may have an intake valve (not shown) and an exhaust valve (not shown) and be attached to the end of cylinder block 131. The intake valve and exhaust valve may be provided separately, but they can also typically be formed together on the same valve plate. The intake valve may be configured to open and close in the direction toward piston 132, while the exhaust valve may be configured to open and close in the opposite direction to the intake valve. Thus, no additional retainer is provided for the intake valve, but a retainer may be provided for the exhaust valve to limit its opening.

[0111] An intake space (not shown) is formed inside the intake muffler 142 for attenuating pressure pulsations of the intake refrigerant or for noise reduction. A muffler inlet 1421, which is indirectly connected to the intake pipe 115, can be formed at one end of the intake space, and a muffler outlet 1422, which is directly connected to the intake side of the valve assembly 141, can be formed at the other end of the intake space. Thus, the refrigerant drawn in through the intake pipe 115 flows into the intake space of the intake muffler 142 through the internal space 110a of the outer casing 110, and can then be drawn into the compression chamber 130a of the cylinder 1314.

[0112] Reference Figure 2 The silencer inlet 1421 and silencer outlet 1422 of the intake silencer 142 can be connected by a plurality of channels 1424a and 1424b. For example, a first intake channel (hereinafter, main intake channel) 1424a and a second intake channel (hereinafter, auxiliary intake channel) 1424b can be formed between the silencer inlet 1421 and silencer outlet 1422 of the intake silencer 1422. The main intake channel 1424a can be configured to communicate with an upstream anechoic space (e.g., a third anechoic space) 1423c, compared to the auxiliary intake channel 1424b, and the auxiliary intake channel 1424b can be configured to communicate with a downstream anechoic space (e.g., a fourth anechoic space) 1423d, compared to the main intake channel 1424a. As a result, the flow resistance in the intake space of the intake silencer 142 can be reduced, thereby suppressing the retention of refrigerant in the intake space of the intake silencer 142. Therefore, by increasing the refrigerant intake rate or suppressing refrigerant overheating, the refrigerant intake amount per unit time (hereinafter referred to as refrigerant intake amount) can be increased, thereby improving compressor performance. The intake muffler 142 will be explained later.

[0113] Inside the discharge muffler 143, a discharge space portion can be formed, constituting a silencing space for discharging refrigerant. At one end of the discharge space portion, a discharge inlet can be formed, which is connected to the discharge side of the valve assembly 141. At the other end of the discharge space portion, a discharge outlet portion can be formed, which is directly connected to the discharge pipe 116 via the annular pipe 117. Thus, a low-pressure compressor can be formed in which the refrigerant compressed in the compression chamber 130a can be directly discharged to the outside of the compressor via the annular pipe 118 and the discharge pipe 116 without passing through the internal space 110a of the outer casing 110.

[0114] The reciprocating compressor of this embodiment, as described above, operates in the following manner.

[0115] That is, if power is applied to the electric motor 120, the rotor 122 rotates. As the rotor 122 rotates, the crankshaft 125 coupled to the rotor 122 rotates, and the rotational force is transmitted to the piston 132 via the connecting rod 126. The piston 132 reciprocates relative to the cylinder 1314 in the front-rear direction via the connecting rod 126.

[0116] For example, if the piston 132 retracts in the cylinder 1314 (intake stroke), the volume of the compression chamber 130a increases. As a result, the refrigerant that is filled in the internal space 110a of the housing 110 via the intake pipe 115 is drawn into the compression chamber 130a via the intake space of the intake muffler 142 and the intake valve of the valve assembly 141.

[0117] Conversely, if the piston 132 advances in the cylinder 1314 (compression / discharge stroke), the volume of the compression chamber 130a decreases. The refrigerant filling the compression chamber 130a is then compressed and discharged through the discharge valve of the valve assembly 141 to the discharge space of the discharge muffler 143. This refrigerant is then discharged into the refrigeration cycle via the annular pipe 118 and the discharge pipe 116, and the aforementioned series of processes is repeated.

[0118] During the intake stroke of piston 132 as described above, the flow resistance of the intake refrigerant flowing into intake muffler 142 may increase excessively as it passes through the complex flow paths and / or spaces formed inside intake muffler 142. This can lead to a decrease in intake velocity or stagnation of the intake refrigerant inside intake muffler 142, causing an increase in the temperature and / or density of the intake refrigerant. Therefore, intake losses may occur in intake muffler 142, resulting in reduced compressor performance.

[0119] In this embodiment, the flow resistance within the intake muffler 142 is reduced by simplifying the movement path of the intake refrigerant through the intake muffler 142, thereby increasing the intake velocity while suppressing overheating of the intake refrigerant. Consequently, by reducing intake losses in the intake muffler 142, the performance of the compressor can be improved.

[0120] Figure 3 This is a perspective view showing the assembly of the inhalation muffler of this embodiment. Figure 4 It is Figure 3 An exploded perspective view of the intake muffler shown in the image. Figure 5 This is a perspective view showing the main intake channel cut open from the inhalation muffler of this embodiment. Figure 6 yes Figure 5 The main view, Figure 7 This is a perspective view showing the inhalation muffler of this embodiment cut open and revealing the secondary inhalation channel. Figure 8 yes Figure 7 The main view, Figure 9 yes Figure 8 Sectional view along line "Ⅸ-Ⅸ".

[0121] Reference Figures 3 to 9 The intake muffler 142 of this embodiment can be divided based on either its external shape or its internal shape. For example, the intake muffler 142 can be divided into a muffler body 142a and a muffler fixing part 142b based on its external shape, and into a muffler inlet 1421, a muffler outlet 1422, a silencing space 1423, and an intake passage 1424 based on its internal shape. Hereinafter, the description will first be based on the external shape of the intake muffler 142, and then on the internal shape of the intake muffler 142.

[0122] Re-reference Figure 1 and Figure 2 The intake muffler 142 of this embodiment may include a muffler body 142a and a muffler fixing part 142b based on its external shape. The muffler body 142a is the part that reduces the vibration noise of the intake refrigerant, and the muffler fixing part 142b is the part that extends from the muffler body 142a and connects the intake muffler 142 to the compression part 130.

[0123] The muffler body 142a and the muffler fixing part 142b can be formed as a single unit. For example, the muffler fixing part 142b can extend from the upper center of the muffler body 142a toward the suction valve part of the valve assembly 141. Thus, the muffler body 142a can be fixed to the compressor body C by the muffler fixing part 142b.

[0124] In this configuration, a muffler inlet 1421, a muffler space 1423, and a suction passage 1424 (described later) can be formed inside the muffler body 142a, and a muffler outlet 1422 (described later) can be formed inside the muffler fixing portion 142b. Thus, refrigerant flowing into the internal space 110a of the housing 110 can sequentially pass through the muffler body 142a and the muffler fixing portion 142b and be drawn into the compression chamber.

[0125] Furthermore, the muffler body 142a can form a sound-absorbing space 1423, which will be described later, inside it, and can typically be formed by combining a plurality of covers. For example, the muffler body 142a can be formed by combining a front cover 142c facing the inner peripheral surface of the housing 110 and a back cover 142d facing the compressor body C, or it can be formed by combining an upper cover (not shown) and a lower cover (not shown). Depending on the situation, the muffler body 142a can be formed by combining three or more covers, or it can be formed as a single unit using a single cover. This embodiment shows an example of the muffler body 142a being formed by combining a front cover and a back cover.

[0126] Reference Figures 3 to 9 The intake muffler 142 of this embodiment can be based on its internal shape and includes a muffler inlet 1421, a muffler outlet 1422, a silencing space 1423, and an intake channel 1424. The muffler inlet 1421 is the part that guides the intake refrigerant to the silencing space 1423, the muffler outlet 1422 is the part that guides the refrigerant that has passed through the silencing space 1423 to the compression chamber 130a, the silencing space 1423 is the part that attenuates the vibration and / or noise of the intake refrigerant, and the intake channel 1424 is the part that guides the intake refrigerant that has passed through the muffler inlet 1421 to the silencing space 1423 and the intake refrigerant that has passed through the silencing space 1423 to the muffler outlet 1422. Thus, the refrigerant can move from the muffler inlet 1421 to the silencing space 1423 via the intake passage 1424, and after the vibration and / or noise are attenuated, it can be drawn into the compression chamber 130a of the cylinder 1423 via the muffler outlet 1422.

[0127] Reference Figure 3 and Figure 4 In this embodiment, the muffler inlet 1421 can be formed by penetrating at least one of the front cover 142c and the back cover 142d constituting the muffler body 142a. For example, the muffler inlet 1421 can be formed by penetrating the front cover 142c, penetrating the back cover 142d, or penetrating both the front cover 142c and the back cover 142d simultaneously. This embodiment shows an example where the muffler inlet 1421 is formed by penetrating the lower half of the front cover 142c.

[0128] The muffler inlet 1421 may be formed by simply penetrating the wall of the muffler body 142a, or it may be bent to protrude outwards from the muffler body 142a. When the muffler inlet 1421 is formed by simply penetrating the wall of the muffler body 142a, the volume of the intake muffler 142 can be increased, thereby effectively attenuating vibrations and / or noise from the intake refrigerant. Conversely, when the muffler inlet 1421 protrudes outwards from the muffler body 142a, the intake passage 1424, described later, can be formed in various ways. This embodiment shows an example where the muffler inlet 1421 is formed by simply penetrating the muffler body 142a.

[0129] The muffler inlet 1421 can be separated from the end of the suction pipe 115 and open into the internal space 110a of the housing 110. Thus, after the refrigerant is filled into the internal space 110a of the housing 110 via the suction pipe 115, it can flow into the interior of the suction muffler 142 via the muffler inlet 1421.

[0130] Reference Figure 3 and Figure 4 In this embodiment, the muffler outlet 1422 can be formed on at least one side of the front cover 142c and the back cover 142d constituting the muffler body 142a. For example, the muffler outlet 1422 can be formed through the front cover 142c, through the back cover 142d, or through both the front cover 142c and the back cover 142d simultaneously. This embodiment shows an example where the muffler outlet 1422 is formed through the upper half of the back cover 142d.

[0131] For example, the muffler outlet 1422 can be formed through the interior of the muffler fixing portion 142b extending from the muffler body portion 142a. Thus, the muffler outlet 1422 can be directly connected to the compression chamber.

[0132] Although not shown, a filter element (not shown) may be provided at the muffler outlet 1422. For example, a filter element such as a screen may be provided on the inlet side, the outlet side, or between the inlet and outlet of the muffler outlet 1422. As a result, foreign matter mixed in with the intake refrigerant is filtered out by the filter element, thereby preventing foreign matter from flowing into the compression chamber 130a of the cylinder 1314.

[0133] Reference Figures 4 to 9 In this embodiment, the silencing space 1423 is a space formed inside the muffler body 142a between the muffler inlet 1421 and the muffler outlet 1422. It can be formed as one silencing space or as a plurality of silencing spaces.

[0134] For example, when the anechoic space 1423 forms a space, the main intake channel 1424a, described later, is connected to the anechoic space 1423. Conversely, the auxiliary intake channel 1424b, described later, does not pass through the anechoic space 1423 but bypasses it, so that the muffler inlet 1421 and the muffler outlet 1422 are directly connected.

[0135] Conversely, when there are multiple anechoic spaces 1423, these multiple anechoic spaces 1423 can be connected in series or in parallel. In this case, the secondary intake channel 1424b, described later, can communicate with an anechoic space further downstream than the main intake channel 1424a, or it can bypass all of the multiple anechoic spaces 1423, allowing a direct connection between the muffler inlet 1421 and the muffler outlet 1422. This embodiment shows an example where multiple anechoic spaces 1423 are formed, and the secondary intake channel 1424b, described later, communicates with an anechoic space 1423 further downstream than the main intake channel 1424a described later.

[0136] Specifically, the anechoic space 1423 can be formed into a plurality of anechoic spaces 1423a by partition walls (not shown) protruding from the inner surfaces of the front cover 142c and / or the back cover 142d facing each other. These plurality of anechoic spaces 1423 can communicate with the intake channel 1424 and / or other adjacent anechoic spaces 1423 by passing through the middle of the partition wall 142e, or they can communicate with the intake channel 1424 and / or other adjacent anechoic spaces 1424 by separating one end of the partition wall 142e from the inner peripheral surface of the sealing protrusion 142f extending along the edge of the front cover 142c and / or the back cover 142d, and the former and the latter can also be combined to achieve communication. This embodiment illustrates an example in which a portion of the partition wall 142e is spaced apart from the inner circumferential surface (more precisely, the inner circumferential surface of the sealing protrusion) of the facing cover (e.g., the front cover) 142c, while communicating with the intake passage 1424 and / or other adjacent anechoic spaces 1423 described later.

[0137] For example, the anechoic space 1423 in this embodiment is composed of four anechoic spaces 1423a, 1423b, 1423c, and 1423d. The four anechoic spaces 1423a, 1423b, 1423c, and 1423d can be connected to each other through the intake channel 1424 described later, or connected to the silencer inlet 1421 and the silencer outlet 1422.

[0138] In other words, one end of the first anechoic space 1423a can be connected to the silencer inlet 1421, and the other end of the first anechoic space 1423a can be connected to the main intake channel 1424a (described later). The second anechoic space 1423b can be connected in series with the first anechoic space 1423a, and can be connected to the main intake channel 1424a through the first anechoic space 1423a. The third anechoic space 1423c can be connected to the first anechoic space 1423a through the main intake channel 1424a (described later), and can also be connected to the fourth anechoic space 1423d. One end of the fourth anechoic space 1423d can be connected to the third anechoic space 1423c, and the other end of the fourth anechoic space 1423d can be connected to the main intake channel 1424a and the third anechoic space 1423c, and can also be connected to the auxiliary intake channel 1424b (described later). Thus, the intake refrigerant flowing into the interior of the intake muffler 142 via the muffler inlet 1421 can attenuate the vibration and / or noise of the intake refrigerant while passing through the respective silencing spaces 1423a, 1423b, 1423c, and 1423d.

[0139] Reference Figures 4 to 9In this embodiment, the intake channel 1424 can be formed through the interior of the intake muffler 142, in other words, the interior of the front cover 142c and / or the interior of the back cover 142d. Alternatively, it can be formed by recessing into the exterior of the muffler body 142a, in other words, the outer peripheral surface of the front cover 142c and / or the outer peripheral surface of the back cover 142d. Furthermore, it can be formed using a separate conduit separated from the outline of the muffler body 142a, in other words, the outer peripheral surface of the front cover 142c and / or the outer peripheral surface of the back cover 142d. This embodiment shows an example where the intake channel 1424 is formed through the interior of the front cover 142c, i.e., between the inner and outer peripheral surfaces of the front cover 142c.

[0140] For example, a channel forming portion 1424c of a predetermined height is formed on the inner peripheral surface of the front cover 142c, and the aforementioned intake channel 1424 can be formed through the interior of the channel forming portion 1424c. Thus, while forming a relatively thin front cover 142c constituting the muffler body 142a, the intake channel 1424 can be smoothly formed inside the front cover 142c.

[0141] Specifically, the intake passage 1424 may be composed of a plurality of passages with different flow resistances. The intake passage 1424 may include a main intake passage (or first intake passage) 1424a and a secondary intake passage (or second intake passage) 1424b. The main intake passage 1424a is a passage that guides the intake refrigerant through as much noise reduction space 1423 as possible, while the secondary intake passage is a passage that guides the intake refrigerant through as little noise reduction space 1423 as possible.

[0142] For example, the inlet 1424a1 of the main intake passage 1424a can be directly connected to the first anechoic space 1423a, and the outlet 1424a2 of the main intake passage 1424a can be directly connected to the third anechoic space 1423c. In this case, since the second anechoic space 1423b is connected to the first anechoic space 1423a, the inlet 1424a1 of the main intake passage 1424a can also be indirectly connected to the second anechoic space 1423b through the first anechoic space 1423a. Thus, a portion of the intake refrigerant flowing into the first anechoic space 1423a and / or the second anechoic space 1423b passes through the third anechoic space 1423c and the fourth anechoic space 1423d sequentially via the main intake passage 1424a, and is then drawn into the compression chamber 130a of the cylinder 1314 via the muffler outlet 1422 connected to the fourth intake space 1423d. Therefore, the refrigerant drawn through the main intake channel 1424a achieves vibration and / or noise attenuation in the third anechoic space 1423c and the fourth anechoic space 1423d, thereby effectively attenuating the vibration and / or noise of the drawn refrigerant.

[0143] Conversely, the inlet 1424b1 of the secondary intake passage 1424b can be directly connected to the first anechoic space 1423a, and the outlet 1424b2 of the secondary intake passage 1424b can be directly connected to the fourth anechoic space 1423d. In other words, the inlet of the secondary intake passage 1424b and the main intake passage 1424a can be connected to the same anechoic space 1423. Conversely, the outlet of the secondary intake passage 1424b can be different from the main intake passage 1424a, bypassing the third anechoic space 1423c and directly connected to the fourth anechoic space 1423d. Thus, another portion of the refrigerant flowing into the first anechoic space 1423a and / or the second anechoic space 1423b, after flowing into the fourth anechoic space 1423d via the secondary intake passage 1424b, is drawn into the compression chamber 130a of the cylinder 1314 via the muffler outlet 1422 connected to the fourth anechoic space 1423d. Therefore, the refrigerant drawn in through the secondary suction passage 1424b experiences less flow resistance than the refrigerant drawn in through the main suction passage 1424a, allowing it to move rapidly toward the muffler outlet 1422. Simultaneously, the temperature and / or density of the refrigerant moving from the muffler inlet 1421 to the muffler outlet 1422 may decrease. Consequently, the amount of refrigerant drawn into the compression chamber 130a via the suction muffler 142 increases, thereby improving compressor performance.

[0144] In this case, the inlet-side cross-sectional area (e.g., inlet-side inner diameter) of the secondary intake channel 1424b can be equal to or smaller than the inlet-side cross-sectional area (e.g., inlet-side inner diameter) of the main intake channel 1424a. For example, the inlet-side cross-sectional area of ​​the secondary intake channel 1424b can be smaller than the inlet-side cross-sectional area of ​​the main intake channel 1424a. Therefore, while reducing intake losses in the intake muffler 142 caused by refrigerant overheating, excessive inflow of intake refrigerant into the secondary intake channel 1424b, which has relatively low flow resistance, can be suppressed. Thus, the vibration and / or noise of the intake refrigerant can be effectively attenuated as a large amount of refrigerant flows into the intake muffler 142, passing sequentially through a plurality of silencing spaces 1423 via the main intake channel 1424a.

[0145] Furthermore, in this case, the secondary intake passage 1424b can be formed upstream of the main intake passage 1424a, based on the intake path of the refrigerant. For example, the inlet 1424b1 of the secondary intake passage 1424b can be formed closer to the muffler inlet 1421 than the inlet 1424a1 of the main intake passage 1424a. Therefore, even if the inlet cross-sectional area of ​​the secondary intake passage 1424b is smaller than that of the main intake passage 1424a, a predetermined amount of refrigerant can flow smoothly into the secondary intake passage 1424b. This allows for sufficient attenuation of vibration and / or noise of the entire intake refrigerant while reducing intake losses caused by refrigerant overheating.

[0146] Furthermore, in this case, the secondary intake channel 1424b can be formed with the same cross-sectional area between its two ends. For example, the secondary intake channel 1424b can be formed with the same cross-sectional area (or inner diameter) from the inlet 1424b1 to the outlet 1424b2. Thus, it is possible to simplify the processing of the secondary intake channel 1424b while keeping the flow resistance in the secondary intake channel 1424b constant.

[0147] Although not illustrated, the secondary suction passage 1424b can also be configured with different cross-sectional areas at its two ends. For example, the inlet-side cross-sectional area of ​​the secondary suction passage 1424b can be larger than the outlet-side cross-sectional area, or the inlet-side cross-sectional area can be smaller than the outlet-side cross-sectional area. In the former case, the refrigerant flow rate at the outlet of the secondary suction passage 1424b can be increased to further improve the overall refrigerant flow rate; in the latter case, the pressure at the outlet 1424b2 of the secondary suction passage 1424b can be reduced to further reduce the overall suction loss.

[0148] On the other hand, the muffler fixing portion 142b can extend from the muffler body portion 142a. For example, the muffler fixing portion 142b can bend and extend from the upper end side of the muffler body portion 142a, in other words, the side opposite to the muffler inlet 1421, toward the suction valve of the valve assembly 141. In this case, the muffler outlet 1422 can be formed through the two ends of the muffler fixing portion 142b. Thus, the suction refrigerant moving toward the final silencing space (e.g., the fourth silencing space) of the muffler body portion 142a can be drawn into the compression chamber 130a via the suction valve after moving toward the suction valve side via the muffler outlet 1422 provided inside the muffler fixing portion 142b.

[0149] In this way, the flow resistance in a portion of the multiple suction channels is reduced, allowing a portion of the refrigerant to be rapidly drawn into the compression chamber via that channel. Consequently, the amount of refrigerant drawn into the compression chamber per unit time via the suction muffler increases, thereby improving compressor performance.

[0150] Furthermore, the refrigerant passes rapidly through the suction channel, which has low flow resistance, thereby reducing suction losses caused by internal overheating of the suction muffler. This increases the amount of refrigerant drawn into the compression chamber per unit time via the suction muffler.

[0151] In addition, another part of the intake passage can attenuate the vibration and / or noise of the intake refrigerant while it passes through multiple silencing spaces in sequence. Therefore, while increasing the amount of refrigerant drawn into the compression chamber, it can also effectively reduce the pressure pulsation and / or intake noise of the refrigerant passing through this intake silencer.

[0152] Furthermore, since multiple intake channels are formed inside the muffler body that constitutes the intake muffler, the refrigerant intake capacity can be increased while simplifying the appearance of the intake muffler, thereby reducing the manufacturing cost. At the same time, interference between the intake muffler and other components can be reduced, allowing for the formation of a larger intake muffler or the miniaturization of the compressor.

[0153] On the other hand, other embodiments of the inhalation muffler will be described below.

[0154] That is, in the aforementioned embodiments, the secondary intake channel is formed inside the intake muffler, but depending on the circumstances, the secondary intake channel may also be formed outside the intake muffler.

[0155] Figure 10 This is a perspective view showing an exploded view of another embodiment of the inhalation channel. Figure 11 In order to explain Figure 10 A cross-sectional view showing the inhalation channel. Figure 12 This is an exploded perspective view showing another embodiment of the inhalation channel. Figure 13 In order to explain Figure 12 A cross-sectional view showing the inhalation channel.

[0156] The basic structure of the inhalation muffler 142 in this embodiment is similar to that in the aforementioned embodiment. For example, a muffler inlet 1421, a muffler outlet 1422, a silencing space 1423, and an inhalation passage 1424 may be formed inside the inhalation muffler 142.

[0157] Additionally, the intake passage 1424 may include a main intake passage 1424a and a secondary intake passage 1424b. The main intake passage 1424a may be configured to connect an anechoic space 1423 communicating with the muffler inlet 1421 and another anechoic space (e.g., a third anechoic space) 1423c located downstream of the muffler inlet 1423. The secondary intake passage 1424b may be configured such that its outlet 1424b2 connects to another anechoic space (e.g., a fourth anechoic space) 1423d located downstream of the anechoic space (e.g., the third anechoic space) 1423c communicating with the outlet 1424a2 of the main intake passage 1424a. Since the basic configuration and effects of the main intake passage 1424a and the secondary intake passage 1424b are similar to those of the aforementioned embodiments, a description of the aforementioned embodiments will be used instead of a description of those embodiments.

[0158] However, in this embodiment, the secondary intake channel 1424b can be formed outside the intake muffler 162. For example, the secondary intake channel 1424b can be formed on the outer peripheral surface of the muffler body 142a. In other words, as in the aforementioned embodiment, the inlet 1424b1 of the secondary intake channel 1424b can communicate with the first anechoic space 1423a, and the outlet 1424b2 of the secondary intake channel 1424b can communicate with the fourth anechoic space 1423d. However, the secondary intake channel 1424b can bypass the third anechoic space 1423c outside the muffler body 142a.

[0159] In this embodiment, the secondary intake channel 1424b can be formed on the outer peripheral surface of the muffler body 142a. In other words, the secondary intake channel 1424b can be formed by forming a groove on the outer peripheral surface of the muffler body 142a and inserting a separate connecting member into the groove.

[0160] As an example, the connecting member can be a cover plate 1424e. For example, as... Figure 10 and Figure 11 As shown, a connecting channel 1424d of a predetermined depth can be formed by recessing the outer peripheral surface of the front cover 142c constituting the muffler body 142a, and a cover plate 1424e can be inserted into the outer opening surface of the connecting channel 1424d to form a secondary intake channel 1424b.

[0161] In this configuration, an inlet portion 1424d1 communicating with the first anechoic space 1423a and an outlet portion 1424d2 communicating with the fourth anechoic space 1423d can be formed at both ends of the connecting channel 1424d. The inlet portion 1424d1 and the outlet portion 1424d2 can be connected to each other by a cover plate 1424e inserted into the connecting channel 1424d. Thus, a secondary intake channel 1424b is formed on the outer peripheral surface of the muffler body 142a, making its formation easy. Furthermore, since the secondary intake channel 1424b is formed outside the muffler body 142a, its cross-sectional area can be appropriately adjusted.

[0162] Alternatively, in this case, the cover plate 1424e can be formed of the same material as the front cover 142c of the intake muffler 142, or it can be formed of a different material than the front cover 142c of the intake muffler 142, for example, it can be formed of a material with a lower thermal transfer coefficient and / or a lower hardness than the front cover 142c. In the former case, the manufacturing and / or assembly of the intake muffler 142, including the secondary intake passage 1424b, can be simplified; in the latter case, the heating of the intake refrigerant through the secondary intake passage 1424b by the internal heat of the housing 110 can be further effectively suppressed.

[0163] As another example, the connecting member can also be a connecting pipe 1424f. For example, as... Figure 12 and Figure 13 As shown, a connecting channel 1424d can be formed by recessing a predetermined depth on the outer peripheral surface of the front cover 142c constituting the muffler body 142a, and a secondary intake channel 1424b can be formed by inserting a connecting pipe 1424f into the connecting channel 1424d.

[0164] In this configuration, an inlet portion 1424d1 communicating with the first anechoic space 1423a and an outlet portion 1424d2 communicating with the fourth anechoic space 1423d can be formed at both ends of the connecting channel 1424d. The inlet portion 1424d1 and the outlet portion 1424d2 can be connected to each other via a connecting pipe 1424f inserted into the connecting channel 1424d. Thus, a secondary intake channel 1424b is formed on the outer peripheral surface of the muffler body 142a, making its formation easy. Furthermore, since the secondary intake channel 1424b is formed outside the muffler body 142a, its cross-sectional area can be appropriately adjusted.

[0165] Alternatively, in this case, the connecting pipe 1424f can be formed of the same material as the front cover 142c of the intake muffler 142, or it can be formed of a different material than the front cover 142c of the intake muffler 142, for example, it can be formed of a material with a lower thermal transfer coefficient and / or a lower hardness than the front cover 142c. In the former case, the manufacturing and / or assembly of the intake muffler 142, including the secondary intake channel 1424b, can be simplified; in the latter case, the heating of the intake refrigerant through the secondary intake channel 1424b by the internal heat of the housing 110 can be further effectively suppressed.

[0166] As described above, with the secondary intake channel 1424b formed on the outer peripheral surface of the muffler body 142a, the secondary intake channel 1424b can be easily formed while maintaining the overall volume of the intake muffler including the secondary intake channel. Furthermore, the cross-sectional area of ​​the secondary intake channel 1424b can be ensured without reducing the volume of the silencing space 1423.

[0167] On the other hand, another embodiment of the inhalation muffler will be described below.

[0168] That is, in the aforementioned embodiments, the secondary intake channel is formed to penetrate through the muffler body or to connect with the muffler body, but depending on the circumstances, the secondary intake channel may also be formed separately from the muffler body.

[0169] Figure 14 This is a cross-sectional view shown to illustrate another embodiment of the inhalation channel. Figure 15 This is a cross-sectional view shown to illustrate another embodiment of the inhalation channel.

[0170] The basic structure of the inhalation muffler 142 in this embodiment is similar to that in the aforementioned embodiment. For example, a muffler inlet 1421, a muffler outlet 1422, a silencing space 1423, and an inhalation passage 1424 may be formed inside the inhalation muffler 142.

[0171] Additionally, the intake passage 1424 may include a main intake passage 1424a and a secondary intake passage 1424b. The main intake passage 1424a may be configured to connect an anechoic space 1423 communicating with the muffler inlet 1421 and another anechoic space (e.g., a third anechoic space) 1423c located downstream of the anechoic space 1423. The secondary intake passage 1424b may be configured such that its outlet 1424b2 connects to another anechoic space (e.g., a fourth anechoic space) 1423d located downstream of the anechoic space (e.g., the third anechoic space) communicating with the outlet 1424a2 of the main intake passage 1424a. Since the basic configuration and effects of the main intake passage 1424a and the secondary intake passage 1424b are similar to those of the aforementioned embodiments, the description of the aforementioned embodiments will be used instead of the description of the embodiments thereon.

[0172] However, in this embodiment, the secondary intake channel 1424b can be formed using a connecting member that connects the first anechoic space 1423a and the fourth anechoic space 1423d. In this case, the outer peripheral surface of the connecting member can contact the outer peripheral surface of the muffler body 142a, or it can be separated by a predetermined interval. In the former case, the secondary intake channel 1424b can be formed outside the muffler body 142a, and the volume of the intake muffler 142 including the connecting member can be minimized as much as possible. In the latter case, the heating of the intake refrigerant through the secondary intake channel 1424b by the refrigerant inside the muffler body 142a can be effectively suppressed. This embodiment shows an example where the connecting member is separated from the muffler body 142a by a predetermined interval.

[0173] For example, refer to Figure 14 In this embodiment, an inlet portion 1424d1 for communicating with a flow path 1424d can be formed in the lower half of the front cover 142c constituting the muffler body 142a, and an outlet portion 1424d2 for communicating with the flow path 1424d can be formed in the upper half of the front cover 142c. The inlet portion 1424d1 of the connecting channel 1424d can penetrate the muffler body 142a to communicate with the first anechoic space 1423a, and the outlet portion 1424d2 of the connecting channel 1424d can penetrate the muffler body 142a to communicate with the fourth anechoic space 1423d. Thus, one end of the connecting pipe 1424f can be inserted into the inlet portion 1424d1 of the connecting channel 1424d to connect with the first anechoic space 1423a, and the other end of the connecting pipe 1424f can be inserted into the outlet portion 1424d2 of the connecting channel 1424d to connect with the fourth anechoic space 1423d.

[0174] In this case, the outer peripheral surface between the two ends of the connecting pipe 1424f, that is, between the inlet and outlet of the connecting pipe 1424f, can be separated from the outer peripheral surface of the muffler body 142a by a predetermined distance. Thus, the auxiliary suction channel 1424b can be separated from the muffler body 142a while directly connecting to the first anechoic space 1423a communicating with the muffler inlet 1421 and the fourth anechoic space 1423d communicating with the muffler outlet 1422.

[0175] Alternatively, in this case, the connecting pipe 1424f can be formed of the same material as the front cover 142c of the intake muffler 142, or it can be formed of a different material than the intake muffler 142, for example, a material with a lower thermal transfer coefficient and / or a lower hardness than the intake muffler 142. In the former case, the manufacturing of the intake muffler 142, including the connecting pipe 1424f, can be simplified; in the latter case, the heating of the intake refrigerant through the secondary intake passage 1424b can be further effectively suppressed.

[0176] As described above, when the auxiliary intake channel 1424b is separated from the muffler body 142a, it is possible not only to suppress the reduction of the volume of the muffler space 1423 due to the auxiliary intake channel 1424b, but also to suppress the refrigerant passing through the auxiliary intake channel 1424b from being heated by the refrigerant passing through the interior of the muffler body 142a, thereby further effectively suppressing the overheating of the intake refrigerant.

[0177] As another example, such as Figure 15 As shown, the secondary intake channel 1424b is separated from the muffler body 142a, and the end of the connecting pipe 1424f that forms the outlet 1424b2 of the secondary intake channel 1424b can pass through the middle of the muffler fixing part 142b to connect to the middle of the muffler outlet 1422.

[0178] In this case, the inlet 1424d1 of the connecting channel 1424d can also penetrate the muffler body 142a to communicate with the first silencing space 1423a, and the outlet 1424d2 of the connecting channel 1424d can also penetrate the muffler fixing part 142b to communicate with the muffler outlet 1422.

[0179] One end of the connecting pipe 1424f can be inserted into the inlet 1424d1 of the connecting channel 1424d to connect with the first anechoic space 1423a, and the other end of the connecting pipe 1424f can be inserted into the outlet 1424d2 of the connecting channel 1424d to connect with the muffler outlet 1422.

[0180] As described above, when the outlet 1424b2 of the secondary intake passage 1424b is connected to the muffler fixing part 142b, the secondary intake passage 1424b can be directly connected to the muffler outlet 1422 without passing through the anechoic space (e.g., the fourth anechoic space) 1423d. This further reduces the flow resistance of the refrigerant through the secondary intake passage 1424b, thereby further effectively suppressing refrigerant overheating.

[0181] On the other hand, another embodiment of the inhalation muffler will be described below.

[0182] That is, in the aforementioned embodiments, multiple intake channels are connected to a muffler inlet, but depending on the circumstances, multiple intake channels may also be connected to multiple muffler inlets.

[0183] Figure 16 This is an exploded perspective view showing another embodiment of the muffler inlet. Figure 17 It is Figure 16 The muffler inlet assembly is shown in cross-sectional view. Figure 18 This is a cross-sectional view showing another embodiment of the muffler inlet assembled.

[0184] The basic structure of the inhalation muffler 142 in this embodiment is similar to that in the aforementioned embodiment. For example, a muffler inlet 1421, a muffler outlet 1422, a silencing space 1423, and an inhalation passage 1424 may be formed inside the inhalation muffler 142.

[0185] Additionally, the intake passage 1424 may include a main intake passage 1424a and a secondary intake passage 1424b. The main intake passage 1424a may be configured to connect an anechoic space 1423 communicating with the muffler inlet 1421 and another anechoic space (e.g., a third anechoic space) 1423c located downstream of the anechoic space 1423. The secondary intake passage 1424b may be configured such that its outlet 1424b2 connects to another anechoic space (e.g., a fourth anechoic space) 1423d located downstream of the anechoic space (e.g., the third anechoic space) communicating with the outlet 1424a2 of the main intake passage 1424a. Since the basic configuration and effects of the main intake passage 1424a and the secondary intake passage 1424b are similar to those of the aforementioned embodiments, the description of the aforementioned embodiments will be used instead of the description of the embodiments thereon.

[0186] However, as Figure 16 and Figure 17As shown, in this embodiment, the intake guide 1425 is inserted into the muffler inlet 1421. The intake guide 1425 has a main guide channel 1425a and a secondary guide channel 1425b that are separable from each other. In this case, the outlet of the main guide channel 1425a can be formed adjacent to the inlet 1424a1 of the main intake channel 1424a, and the outlet of the secondary guide channel 1425b can be formed adjacent to the inlet 1424b1 of the secondary intake channel 1424b. Thus, a portion of the refrigerant can be guided to the main intake channel 1424a side through the main guide channel 1425a, and another portion of the refrigerant can be guided to the secondary intake channel 1424b side through the secondary guide channel 1425b.

[0187] Specifically, the outlets of the main guide channel 1425a and the secondary guide channel 1425b can be configured to communicate with the first anechoic space 1423a, respectively. In other words, the outlets of the main guide channel 1425a and the secondary guide channel 1425b can be configured to open into the first anechoic space 1423a, respectively.

[0188] For example, the main guide channel 1425a can be formed to pass through the center of the suction guide 1425 between its two ends, and the secondary guide channel 1425b can be formed to pass through the suction guide 1425 between its two ends on one side of the main guide channel 1425a. In other words, the main guide channel 1425a and the secondary guide channel 1425b can be formed by passing through the outer side of one end constituting the suction guide 1425 towards the inner side of the other end constituting the suction guide 1425.

[0189] In this case, the inner surface of the suction guide 1425 can be formed in various shapes depending on the positions of the main suction channel 1424a and the auxiliary suction channel 1424b. For example, if the inlet 1424b1 of the auxiliary suction channel 1424b is located upstream (e.g., on the outer contour side) of the inlet 1424a1 of the main suction channel 1424a based on the refrigerant suction path, the outlet of the auxiliary guide channel 1425b can be inclined and located closer upstream (e.g., on the outer contour side) than the outlet of the main guide channel 1425a. As a result, the outlet of the main guide channel 1425a extends deeper into the interior of the muffler body 142a than the outlet of the auxiliary guide channel 1425b, and the outlet of the main guide channel 1425a can be formed adjacent to the inlet 1424a1 of the main suction channel 1424a, and the outlet of the auxiliary guide channel 1425b can be formed adjacent to the inlet 1424b1 of the auxiliary suction channel 1424b.

[0190] As described above, when the intake guide 1425, having a main intake channel 1425a and a secondary intake channel 1425b, is provided at the muffler inlet 1421, even if the main intake channel 1424a and the secondary intake channel 1424b are separated from each other, the intake refrigerant can be appropriately distributed through the intake guide 1425 and move towards the two intake channels 1424a and 1424b. Therefore, when the refrigerant is intake, overheating of the intake refrigerant in the intake muffler 142 can be further effectively suppressed.

[0191] Although not shown in the figure, the inner surface of the intake guide 1425 may also be formed in a stepped shape. In this case, the outlet of the main guide channel 1425a may extend deeper into the interior of the muffler body 142a than the outlet of the secondary guide channel 1425b.

[0192] Alternatively, although not shown, the secondary guide channel 1425b can also be formed by recessing a predetermined depth into the outer peripheral surface of the suction guide 1425 and longitudinally severing the two ends of the suction guide 1425. In this case, the secondary guide channel 1425b of the suction guide 1425 can be easily formed.

[0193] In another embodiment, an inhalation guide 1425 having a main guide channel 1425a and a secondary guide channel 1425b is inserted into a muffler inlet 1421, and the main guide channel 1425a can be connected separately to the main inhalation channel 1424a, and the secondary guide channel 1425b can be connected separately to the secondary inhalation channel 1424b.

[0194] For example, such as Figure 18 As shown, the main guide channel 1425a is formed by passing through the outer surface of one end of the intake guide 1425 and the inner surface of the other end, while the secondary guide channel 1425b is formed by passing through the outer peripheral surface of the intake guide 1425. Thus, the outlet of the main guide channel 1425a is connected to the main intake channel 1424a via the first anechoic space 1423a, and conversely, the outlet of the secondary guide channel 1425b is directly connected to the inlet 1424b1 of the secondary intake channel 1424b.

[0195] As described above, when the plurality of intake channels 1424a and 1424b are individually connected to the plurality of guide channels 1425a and 1425b, the refrigerant intake through the main guide channel 1425a moves towards the main intake channel 1424a side via the first anechoic space 1423a, while the refrigerant intake through the secondary guide channel 1425b does not pass through the first anechoic space 1423a but moves directly towards the secondary intake channel 1424b side. Therefore, a portion of the intake refrigerant does not pass through the complex internal flow path of the intake muffler 142 but moves rapidly towards the compression chamber 130a. This allows for more effective attenuation of vibration and / or noise in the intake muffler 142, while further suppressing overheating of the intake refrigerant in the intake muffler 142, thereby further reducing intake losses.

[0196] Although not shown in the figure, in this case, the secondary guide channel 1425b can also be formed by recessing a predetermined depth into the outer peripheral surface of the suction guide 1425, and can extend along the length direction from the outer side of one end constituting the suction guide 1425 to connect with the secondary suction channel. In this case, the secondary guide channel 1425b of the suction guide 1425 can be easily formed.

[0197] On the other hand, another embodiment of the inhalation muffler will be described below.

[0198] That is, in the aforementioned embodiments, the muffler inlet is formed in the muffler body, but depending on the circumstances, the muffler inlet may also be formed outside the muffler body.

[0199] Figure 19 This is a perspective view showing yet another embodiment of the intake muffler. Figure 20 It is Figure 19 An exploded view of the intake muffler, shown in three-dimensional form. Figure 21 It is Figure 20 The intake muffler assembly is shown in cross-section.

[0200] The basic structure of the inhalation muffler 142 in this embodiment is similar to that in the aforementioned embodiment. For example, a muffler inlet 1421, a muffler outlet 1422, a silencing space 1423, and an inhalation passage 1424 may be formed inside the inhalation muffler 142.

[0201] Additionally, the intake passage 1424 may include a main intake passage 1424a and a secondary intake passage 1424b. The main intake passage 1424a may be configured to connect the muffler inlet 1421 and the anechoic space 1423, and the secondary intake passage 1424b may be configured such that its outlet 1424b2 connects to another anechoic space (e.g., a second anechoic space) 1423b located downstream of the anechoic space (e.g., a first anechoic space) 1423a that communicates with the outlet 1424a2 of the main intake passage 1424a. Since the basic configuration and effects of the main intake passage 1424a and the secondary intake passage 1424b are similar to those of the aforementioned embodiments, the description of the aforementioned embodiments will be used instead of the description of the latter.

[0202] However, in this embodiment, the muffler inlet 1421 is formed outside the muffler body 142a, and the muffler inlet 1421 can be formed at one end of the muffler extension 1426, which extends elongatedly from the outer peripheral surface of the muffler body 142a toward the inner peripheral surface of the housing 110. For example, the muffler extension 1426 extends elongatedly from the side of the muffler body 142a toward the suction pipe 115, and the muffler inlet 1421 can be formed at the end of the muffler extension 1426 facing the suction pipe 115. Thus, the muffler inlet 1421 is arranged adjacent to the suction pipe 115, so that the intake refrigerant flowing into the interior space 110a of the housing 110 via the suction pipe 115 can move rapidly toward the intake muffler 142.

[0203] Reference Figures 19 to 21 In this embodiment, the muffler extension 1426 can be formed by extending from the front cover 142c and the back cover 142d constituting the muffler body 142a, respectively. For example, the muffler extension 1426 may include a front extension 1426a and a back extension 1426b. The front extension 1426a can extend from the outer peripheral surface of the front cover 142c, and the back extension 1426b can extend from the outer peripheral surface of the back cover 142d. Sealing protrusions 142f that interlock with each other can be formed on one side of the front extension 1426a and one side of the back extension 1426b facing it. As a result, a sound-absorbing space (hereinafter, the third sound-absorbing space) can be formed between the front extension 1426a and the back extension 1426b, for example, in the middle of the secondary intake channel 1424b, thereby further effectively reducing vibration and / or noise generated when refrigerant is drawn in.

[0204] In this case, the intermediate opening 1427c (described later) and the anechoic space (e.g., the first anechoic space) 1423a communicating with the intermediate opening 1427c can attenuate noise in a specific frequency band. Conversely, the inlet 1424b1, outlet 1424b2 of the secondary intake channel 1424b, and the channel anechoic section 1424b3 formed in the middle of the secondary intake channel 1424b can attenuate noise in a wider frequency band. Thus, the intake silencer 142 of this embodiment can improve the overall noise reduction effect.

[0205] The main intake channel 1424a and the secondary intake channel 1424b can be formed between the front extension 1426a and the rear extension 1426b, or only one side of the main intake channel 1424a and the secondary intake channel 1424b can be formed between the front extension 1426a and the rear extension 1426b, while the other side of the intake channel 1424 can be formed on either side of the front extension 1426a or the rear extension 1426b. In the former case, the shapes of the two intake channels 1424 can be formed in various ways, while in the latter case, a portion of the intake channel 1424 can be easily formed. This embodiment shows the latter case, i.e., an example where only the secondary intake channel 1424b is formed between the front extension 1426a and the rear extension 1426b.

[0206] Specifically, the main suction channel 1424a of this embodiment may be composed of a plurality of channel portions that are at least partially separated along the refrigerant suction path. For example, the main suction channel 1424a may include an inlet-side channel portion 1427a, an outlet-side channel portion 1427b, and a central opening portion 1427c. The inlet-side channel portion 1427a is the portion that opens to the muffler inlet 1421, the outlet-side channel portion 1427b is the portion that opens to the muffler outlet 1422, and the central opening portion 1427c is the portion that opens to the silencing space 1423 between the muffler inlet 1421 and the muffler outlet 1422.

[0207] The inlet-side channel portion 1427a can be formed on the back cover 142d constituting the muffler body portion 142a, and can extend through the muffler body portion 142a. For example, one end of the inlet-side channel portion 1427a can be formed in a pipe shape on one side of the muffler extension portion 1426, and the other end of the inlet-side channel portion 1427a can be formed in a pipe shape on one side of the muffler body portion 142a. Thus, one end of the inlet-side channel portion 1427a extends as adjacent as possible to the suction pipe 115, thereby increasing the amount of refrigerant drawn into the compression chamber 130a. On the other hand, the other end of the inlet-side channel portion 1427a extends as deep as possible into the interior of the muffler body portion 142a, thereby effectively suppressing the backflow of refrigerant flowing into the corresponding silencing space 1423 towards the muffler inlet 1421.

[0208] The outlet-side channel portion 1427b can be formed on the front cover 142c constituting the muffler body portion 142a, and can also be formed inside the muffler body portion 142a. For example, the outlet-side channel portion 1427b can be inclined at a predetermined angle relative to the inlet-side channel portion 1427a inside the muffler body portion 142a. In other words, the main suction channel 1424a can be bent at the intermediate opening 1427c (described later) located between the inlet-side channel portion 1427a and the outlet-side channel portion 1427b. As a result, the refrigerant can be retained at the intermediate opening 1427c (described later) before moving from the inlet-side channel portion 1427a to the outlet-side channel portion 1427b. As a result, most of the refrigerant moves smoothly from the middle of the main suction channel 1424a to the corresponding anechoic space 1423, thereby effectively attenuating the vibration noise of the refrigerant passing through the main suction channel 1424a. The same applies to the intake noise flowing in reverse from the outlet-side passage 1427b to the inlet-side passage 1427a.

[0209] The intermediate opening 1427c can be formed between the inlet-side channel 1427a and the outlet-side channel 1427b. For example, the intermediate opening 1427c can be formed between the downstream end of the inlet-side channel 1427a, which is based on the refrigerant suction path, and the upstream end of the outlet-side channel 1427b, which it faces.

[0210] The intermediate opening 1427c can communicate with any anechoic space, such as an anechoic space (e.g., a first anechoic space) 1423a upstream of the anechoic space (e.g., a third anechoic space) 1423c, which is connected to the outlet 1424b2 of the secondary intake channel 1424b based on the refrigerant intake path. Thus, a portion of the refrigerant drawn into the muffler outlet 1422 via the main intake channel 1424a moves through the intermediate opening 1427c to the corresponding anechoic space 1423, thereby reducing pressure pulsations generated during refrigerant intake. Simultaneously, noise generated during refrigerant intake and flowing backwards towards the muffler inlet 1421 can be attenuated by moving through the aforementioned intermediate opening 1427c to the corresponding anechoic space 1423.

[0211] The intermediate opening 1427c can be formed as at least one hole (not shown) penetrating the corresponding anechoic space 1423 between the inlet-side channel 1427a and the outlet-side channel 1427b. Alternatively, the intermediate opening 1427c can be formed by the inlet-side channel 1427a and the outlet-side channel 1427b facing it, separated by a predetermined interval along the periphery of the main intake channel 1424a. In the former case, a portion of the periphery of the intermediate opening 1427c is blocked, allowing the refrigerant to move rapidly toward the muffler outlet 1422. In the latter case, the intermediate opening 1427c is formed by the two side extensions 1426a and 1426b being separated, thus easily forming the main intake channel 1424a including the intermediate opening 1427c. This embodiment shows the latter case, where the inlet-side channel 1427a and the outlet-side channel 1427b are separated from each other along the periphery of the main intake channel 1424a.

[0212] In this embodiment, the secondary suction channel 1424b is formed on one side of the main suction channel 1424a, and as described above, it can be formed between the front extension 1426a and the back extension 1426b. For example, the front extension 1426a and the back extension 1426b are respectively formed with interlocking sealing protrusions 142f, and the aforementioned secondary suction channel 1424b can be formed in the space formed along the inner peripheral surface of these sealing protrusions 142f. Thus, since the secondary suction channel 1424b is formed between the two side extensions 1426a and 1426b, injection molding is relatively simple compared to forming it in one extension (e.g., the back extension) 1426b as the main suction channel 1424a, and it can be formed into various shapes.

[0213] In this case, the cross-sectional areas of the secondary suction channel 1424b between the inlet 1424b1 and the outlet 1424b2 can be the same or different. In the former case, the flow resistance in the secondary suction channel 1424b can be minimized to allow the refrigerant to move rapidly towards the muffler outlet 1422, thereby effectively suppressing refrigerant overheating. In the latter case, by making the intermediate cross-sectional area of ​​the secondary suction channel 1424b larger than the cross-sectional area of ​​the main suction channel 1424a, a channel silencing section 1424b3 constituting a silencing space can be formed inside the secondary suction channel 1424b, thereby more effectively attenuating vibrations and / or noise generated during refrigerant intake. This embodiment illustrates the latter case, where the intermediate cross-sectional area of ​​the secondary suction channel 1424b is relatively large.

[0214] Furthermore, in this case, the inlet 1424b1 and / or outlet 1424b2 of the secondary intake passage 1424b can be equal to or smaller than the cross-sectional area of ​​the main intake passage 1424a. For example, the cross-sectional areas between the two ends of the main intake passage 1424a can be the same or approximately the same, while the cross-sectional areas of the inlet 1424b1 and / or outlet 1424b2 of the secondary intake passage 1424b can be smaller than the cross-sectional area of ​​the main intake passage 1424a. Thus, by suppressing excessive inflow of refrigerant moving from the muffler inlet 1421 to the muffler outlet 1422 into the secondary intake passage 1424b side, vibrations and / or noise generated during refrigerant intake can be effectively attenuated.

[0215] As described above, when the muffler inlet 1421 is formed outside the muffler body 142a, in other words, when the muffler inlet 1421 is formed at one end of the muffler extension 1426 extending from the muffler body 142a to the housing 110, the muffler inlet 1421 can be formed close to the suction pipe 115. Therefore, refrigerant drawn into the interior space 110a of the housing 110 via the suction pipe 115 can rapidly flow into the interior of the muffler 142a via the muffler inlet 1421 adjacent to the suction pipe 115. Thus, by suppressing the overheating of the drawn refrigerant due to the internal heat of the housing 110, the refrigerant intake can be further increased.

[0216] Furthermore, in this case, the lengths of the main intake channel 1424a and / or the auxiliary intake channel 1424b can be extended by an amount corresponding to the length of the muffler extension 1426. This results in an increased length of the intake channel 1424 at the neck, thereby improving the noise attenuation effect in the intake muffler 142.

[0217] Furthermore, in this case, at least a portion of the intake passage 1424, such as the secondary intake passage 1424b, is formed outside the muffler body 142a, so the secondary intake passage 1424b can be separated from the anechoic space 1423 by a predetermined distance. Thus, by effectively suppressing the refrigerant passing through the secondary intake passage 1424b from overheating due to the internal heat of the anechoic space 1423, intake losses can be further reduced.

[0218] Furthermore, in this case, since the main intake channel 1424a and the auxiliary intake channel 1424b are respectively formed on the muffler extension 1426 extending from the muffler body 142a, the rigidity of the main intake channel 1424a and the auxiliary intake channel 1424b can be ensured. Thus, the main intake channel 1424a and the auxiliary intake channel 1424b can be formed outside the muffler body 142a, and the reliability of the intake muffler 142 including the main intake channel 1424a and the auxiliary intake channel 1424b can be improved.

[0219] On the other hand, another embodiment of the inhalation muffler will be described below.

[0220] That is, in the aforementioned embodiments, a plurality of intake channels are formed in one muffler extension, but depending on the circumstances, a plurality of intake channels may also be formed individually in each muffler extension.

[0221] Figure 22 This is a perspective view showing yet another embodiment of the intake muffler. Figure 23 It is Figure 22 The intake muffler assembly is shown in cross-sectional view. Figure 24 It is shown Figure 23 A cross-sectional view of another embodiment of the intake passage in an intake muffler.

[0222] The basic structure of the inhalation muffler 142 in this embodiment is similar to that in the aforementioned embodiment. For example, a muffler inlet 1421, a muffler outlet 1422, a silencing space 1423, and an inhalation passage 1424 may be formed inside the inhalation muffler 142.

[0223] Additionally, the intake channel 1424 may include a main intake channel 1424a and a secondary intake channel 1424b. The main intake channel 1424a may be configured to connect the muffler inlet 1421 and the anechoic space 1423, and the secondary intake channel 1424b may be configured such that its outlet 1424b2 connects to another anechoic space (e.g., a second anechoic space) 1423b located downstream of the anechoic space (e.g., a first anechoic space) 1423a that communicates with the outlet 1424a2 of the main intake channel 1424a. Since the basic structure and function of the main intake channel 1424a and the secondary intake channel 1424b are similar to those described above... Figure 21 The embodiments are similar, therefore the description of the foregoing embodiments will be used instead of the description thereon.

[0224] However, as Figures 22 to 24 As shown, in this embodiment, the main intake channel 1424a and the secondary intake channel 1424b can be formed separately from each other. For example, on the outer peripheral surface of the muffler body 142a, a plurality of muffler extensions 1426 are formed separately from each other. The main intake channel 1424a can be formed through the muffler extension (hereinafter, the main side extension) 1428a on one side of the plurality of muffler extensions 1426, and the secondary intake channel 1424b can be formed through the other muffler extension (hereinafter, the secondary side extension) 1428b.

[0225] In this case, since the main side extension 1428a and the secondary side extension 1428b are separated from each other, at least a portion of the main intake passage 1424a and the secondary intake passage 1424b can be separated from each other outside the muffler body 142a. This suppresses heat exchange between the refrigerant drawn through the main intake passage 1424a and the secondary intake passage 1424b, respectively.

[0226] Specifically, the main intake channel 1424a of this embodiment may include an inlet-side channel portion 1427a, an outlet-side channel portion 1427b, and a central opening portion 1427c. The inlet-side channel portion 1427a may be formed in a pipe shape between the main-side extension portion 1428a and the muffler body portion 142a. The outlet-side channel portion 1427b may be formed in a pipe shape within the muffler body portion 142a. The central opening portion 1427c may be formed within the muffler body portion 142a by at least a portion of the inlet-side channel portion 1427a and the outlet-side channel portion 1427b facing it. The main intake channel 1424a, including these inlet-side channel portions 1427a, outlet-side channel portions 1427b, and central opening portion 1427c, is similar to the aforementioned... Figure 21 The main inhalation channel 1424a shown in the embodiment is substantially the same, therefore, the same applies to the main inhalation channel 1424a shown in the embodiment. Figure 21 Instead of describing the embodiments, the description of the embodiments will be used.

[0227] The secondary intake channel 1424b can be formed through the interior of the secondary side extension 1428b. For example, as shown in FIG25, the secondary side extension 1428b can extend integrally from the front cover 142c or the back cover 142d, or it can be subsequently assembled to the front cover 142c or the back cover 142d, as shown in FIG26. The embodiment of FIG25 can easily form a secondary intake channel 1424b including the secondary side extension 1428b, and the embodiment of FIG26 can vary the material and / or shape of the secondary side extension 1428b to more effectively suppress the overheating of the refrigerant drawn through the secondary intake channel 1424b.

[0228] One end of the secondary intake passage 1424b can be connected to the muffler inlet (or the middle of the main intake passage) 1421, and the other end of the secondary intake passage 1424b can be connected to another anechoic space (e.g., the second anechoic space) 1423b located downstream of the anechoic space (e.g., the first anechoic space) 1423a, which is connected to the middle opening 1427c of the main intake passage 1424a, based on the refrigerant intake path. Therefore, the refrigerant flowing from the muffler inlet 1421 into the secondary intake passage 1424b can move towards the muffler outlet 1422 more rapidly than the refrigerant flowing from the muffler inlet 1421 into the main intake passage 1424a.

[0229] In this case, the cross-sectional area between the two ends of the secondary intake passage 1424b can be the same, and can be equal to or smaller than the cross-sectional area of ​​the main intake passage 1424a. This prevents excessive inflow of refrigerant from the muffler inlet 1421 into the secondary intake passage 1424b.

[0230] As described above, when the main intake passage 1424a and the auxiliary intake passage 1424b are formed separately in each of the muffler extensions 1426a and 1426b, the main intake passage 1424a and the auxiliary intake passage 1424b can be separated from each other by a predetermined interval. This prevents the refrigerant drawn through the auxiliary intake passage 1424b from being heated by the refrigerant drawn through the main intake passage 1424a. Consequently, the amount of refrigerant drawn into the compression chamber 130a increases, thereby further improving compressor performance.

[0231] On the other hand, in the aforementioned embodiments, the indirect inhalation method in which the inhalation muffler 142's muffler inlet is separated from the inhalation pipe outlet and communicates with the internal space of the housing was described as an example. However, the same approach can also be applied in the case of the direct inhalation method in which the inhalation pipe is sealed and directly connected to the inhalation muffler inlet 1421 of the inhalation muffler 142, and the proximity inhalation method in which the inhalation pipe 115 is separated from the inhalation muffler inlet 1421 of the inhalation muffler 142 by a predetermined gap and inserted.

[0232] However, in direct or near-inhalation methods, based on the refrigerant intake path, the inlet 1424b1 of the secondary intake channel 1424b can be formed at the same location as or downstream of the outlet of the intake pipe 115. Thus, a portion of the refrigerant drawn in via the intake pipe 115 can move rapidly towards the muffler outlet (or an anechoic space closer to the muffler outlet than the outlet of the main intake channel) 1422 after moving from the muffler inlet 1421 towards the secondary intake channel 1424b. The resulting effects will be described in place of the description of the foregoing embodiments.

Claims

1. A reciprocating compressor, wherein, include: shell; The cylinder barrel is disposed within the internal space of the housing; A piston is configured to reciprocate within the cylinder to form a compression section; A suction tube, which extends through and is attached to the outer casing; as well as An intake muffler has a muffler inlet, a muffler outlet, a silencing space, and an intake channel. The muffler inlet opens toward the intake pipe, and the muffler outlet is separated from the muffler inlet and opens toward the cylinder. At least one of the silencing spaces is disposed between the muffler inlet and the muffler outlet. The intake channel guides the refrigerant flowing in through the muffler inlet toward the muffler outlet side. The suction channel is composed of a plurality of suction channels, each of which has a different flow resistance.

2. The reciprocating compressor according to claim 1, wherein, Each of the plurality of said inhalation channels has an outlet connected to a different anechoic space.

3. The reciprocating compressor according to claim 1, wherein, The plurality of said inhalation channels are formed such that at least a portion of them have different cross-sectional areas.

4. The reciprocating compressor according to claim 3, wherein, The plurality of said suction channels are formed with different inlet side cross-sectional areas based on the refrigerant suction path.

5. The reciprocating compressor according to claim 4, wherein, In the plurality of said suction channels, based on the refrigerant suction path, the inlet cross-sectional area of ​​the suction channel communicating with the downstream anechoic space is smaller than the inlet cross-sectional area of ​​the suction channel communicating with the upstream anechoic space.

6. The reciprocating compressor according to claim 1, wherein, The inhalation silencer includes: The main body of the muffler is provided with at least one of the aforementioned silencing spaces; and A muffler fixing part extends from one side of the muffler body and is fixed to the compression part; The muffler inlet is formed by penetrating the main body of the muffler.

7. The reciprocating compressor according to claim 6, wherein, The plurality of said inhalation channels include: First inhalation passage; and The second intake channel is located on one side of the first intake channel, and the outlet of the second intake channel is connected to an anechoic space further downstream than the anechoic space connected to the outlet of the first intake channel. The inlet of the first inhalation channel and the inlet of the second inhalation channel are connected to the same anechoic space.

8. The reciprocating compressor according to claim 7, wherein, The inlet of the second suction channel is located upstream of the inlet of the first suction channel, based on the refrigerant's suction path.

9. The reciprocating compressor according to claim 6, wherein, The plurality of said inhalation channels include: First inhalation passage; and The second intake channel is located on one side of the first intake channel, and the outlet of the second intake channel is connected to an anechoic space further downstream than the anechoic space connected to the outlet of the first intake channel. The first inhalation channel and the second inhalation channel are formed inside the inhalation muffler.

10. The reciprocating compressor according to claim 9, wherein, A channel forming portion protruding toward the silencing space is formed on the inner peripheral surface of the intake muffler; A plurality of the aforementioned inhalation channels are formed by penetrating the interior of the channel forming portion.

11. The reciprocating compressor according to claim 6, wherein, At least one of the plurality of said inhalation channels is formed on the outside of the inhalation muffler.

12. The reciprocating compressor according to claim 11, wherein, The plurality of said inhalation channels include: First inhalation passage; and The second intake channel is located on one side of the first intake channel, and the outlet of the second intake channel is connected to an anechoic space further downstream than the anechoic space connected to the outlet of the first intake channel. The second intake channel is formed on the outer peripheral surface of the intake muffler.

13. The reciprocating compressor according to claim 12, wherein, A connecting channel is formed on the outer peripheral surface of the inhalation muffler, and both ends of the connecting channel are recessed into the silencing space by a predetermined depth. An inlet and an outlet are formed on both sides of the connecting channel. The second inhalation channel is formed by a connecting member inserted into the connecting channel and covering the inlet and the outlet, or by a connecting member with its two ends connected to the inlet and the outlet respectively.

14. The reciprocating compressor according to claim 11, wherein, The plurality of said inhalation channels include: First inhalation passage; and The second intake channel is located on one side of the first intake channel, and the outlet of the second intake channel is connected to an anechoic space further downstream than the anechoic space connected to the outlet of the first intake channel. The second intake channel is formed by penetrating the interior of the connecting member that is separated from the outer peripheral surface of the muffler body.

15. The reciprocating compressor according to claim 14, wherein, The inlet connected to one end of the connecting member and the outlet connected to the other end of the connecting member are respectively connected to different silencing spaces in the muffler body.

16. The reciprocating compressor according to claim 14, wherein, An inlet portion connected to one end of the connecting member penetrates the main body of the silencer to communicate with the silencing space; The outlet portion, which is connected to the other end of the connecting member, passes through the muffler fixing portion to communicate with the muffler outlet.

17. The reciprocating compressor according to claim 6, wherein, A suction guide is incorporated at the muffler inlet; The inhalation guide has a plurality of separate guide channels that communicate with the plurality of inhalation channels.

18. The reciprocating compressor according to claim 17, wherein, The plurality of said guide channels include: First guidance channel; and The second guide channel is located on one side of the first guide channel; The first guide channel and the second guide channel are connected to the plurality of the inhalation channels in the same anechoic space.

19. The reciprocating compressor according to claim 18, wherein, The plurality of said inhalation channels include: First inhalation passage; and The second intake channel is located on one side of the first intake channel, and the outlet of the second intake channel is connected to an anechoic space further downstream than the anechoic space connected to the outlet of the first intake channel. The second guide channel is formed to be closer to the second inhalation channel than the first inhalation channel.

20. The reciprocating compressor according to claim 17, wherein, The plurality of said guide channels include: First guidance channel; and The second guide channel is located on one side of the first guide channel; The first guide channel and the second guide channel are each individually connected to a plurality of the inhalation channels.

21. The reciprocating compressor according to claim 20, wherein, The plurality of said inhalation channels include: First inhalation passage; and The second intake channel is located on one side of the first intake channel, and the outlet of the second intake channel is connected to an anechoic space further downstream than the anechoic space connected to the outlet of the first intake channel. The first guide channel is connected to the first inhalation channel through at least one anechoic space, and the second guide channel is directly connected to the second inhalation channel.

22. The reciprocating compressor according to claim 1, wherein, The inhalation silencer includes: The main body of the muffler is provided with at least one of the aforementioned sound-absorbing spaces; A muffler fixing part extends from the muffler body and is fixed to the compression part; and A muffler extension extends from the outer peripheral surface of the muffler body, and a muffler inlet is formed on one side of the muffler extension; The plurality of said inhalation channels penetrate the interior of the muffler extension and communicate with the muffler inlet.

23. The reciprocating compressor according to claim 22, wherein, At least a portion of the muffler extension extends from a plurality of covers constituting the muffler body and interlocks with each other; The plurality of said inhalation channels are separated from each other in the muffler extension.

24. The reciprocating compressor according to claim 23, wherein, The plurality of said inhalation channels include: First inhalation passage; and The second intake channel is located on one side of the first intake channel, and the outlet of the second intake channel is connected to an anechoic space further downstream than the anechoic space connected to the outlet of the first intake channel. The second inhalation channel is formed between the two side extensions that extend from the plurality of the covers respectively.

25. The reciprocating compressor according to claim 24, wherein, The second suction channel has a different cross-sectional area along the refrigerant suction path.

26. The reciprocating compressor according to claim 25, wherein, At least a portion of the cross-sectional area of ​​the second inhalation channel is larger than the cross-sectional area of ​​the first inhalation channel.

27. The reciprocating compressor according to claim 22, wherein, The muffler extension is formed in a plurality of separate portions; The plurality of said inhalation channels are formed by passing through the interior of the plurality of said muffler extensions one-to-one.

28. The reciprocating compressor according to claim 27, wherein, At least one of the plurality of muffler extensions is integrally formed from any one of the plurality of covers constituting the muffler body.

29. The reciprocating compressor according to claim 27, wherein, At least one of the plurality of muffler extensions is formed by subsequent assembly to any one of the plurality of covers constituting the muffler body.

30. The reciprocating compressor according to claim 22, wherein, The plurality of said inhalation channels include: First inhalation passage; and The second intake channel is located on one side of the first intake channel, and the outlet of the second intake channel is connected to an anechoic space further downstream than the anechoic space connected to the outlet of the first intake channel. An intermediate opening is formed between the inlet and outlet of the first inhalation channel, penetrating between the interior and exterior of the first inhalation channel; The intermediate opening is connected to the anechoic space that is closer to the upstream side than the anechoic space that is connected to the outlet of the second intake channel, based on the refrigerant intake path.

31. The reciprocating compressor according to claim 30, wherein, The first inhalation channel includes: The inlet-side passageway is open towards the inlet of the muffler; and The outlet-side passage is open towards the outlet of the muffler; The intermediate opening is formed by separating at least a portion between the inlet-side channel and the outlet-side channel.

32. The reciprocating compressor according to any one of claims 1 to 31, wherein, The inhalation tube is connected to the internal space of the outer shell; The silencer inlet is separated from the intake pipe and communicates with the internal space of the housing.

33. The reciprocating compressor according to any one of claims 1 to 31, wherein, The inhalation tube penetrates the outer shell and is inserted into the silencer inlet; At least one of the plurality of suction channels is formed on the same line as the outlet of the suction pipe, or is formed at a position downstream of the outlet of the suction pipe, based on the refrigerant suction path.

Images