CN110925210A - Scroll compressor and refrigeration system - Google Patents

Abstract

The invention provides a scroll compressor and a refrigeration system. The scroll compressor comprises a shell, a fixed scroll and an orbiting scroll, wherein the fixed scroll is arranged in the shell, the orbiting scroll is movably arranged in the fixed scroll, and a scroll cavity is formed between the fixed scroll and the orbiting scroll; the fixed scroll disk is provided with an exhaust channel communicated with the scroll cavity, the fixed scroll disk is provided with a silencing cavity arranged around the periphery of the exhaust channel, and the silencing cavity and the exhaust channel are arranged at intervals; wherein, the static vortex disc is provided with an air inlet channel communicated with the silencing cavity, and the static vortex disc is provided with an air inlet hole communicated with the silencing cavity and the vortex cavity. The technical scheme of the invention solves the problem that the vortex compressor in the prior art has noise during air injection compensation.

Description

Scroll compressor and refrigeration system

Technical Field

The invention relates to the technical field of compressors, in particular to a scroll compressor and a refrigeration system.

Background

The scroll compressor has the advantages of simple structure, small volume, light weight, high mechanical efficiency, stable operation and the like.

In the use process of the scroll compressor, when the scroll compressor works under the working condition of large pressure ratio, the heating quantity needs to be compensated by adopting an air injection mode. The gas injection structure in the related art directly injects gas into the vortex cavity, which can cause abnormal noise.

Disclosure of Invention

The invention mainly aims to provide a scroll compressor and a refrigeration system, which aim to solve the problem that the scroll compressor in the prior art has noise during air injection compensation.

In order to achieve the above object, according to one aspect of the present invention, there is provided a scroll compressor including a housing, a fixed scroll disposed in the housing, and an orbiting scroll movably disposed in the fixed scroll, a scroll chamber being formed between the fixed scroll and the orbiting scroll; the fixed scroll disk is provided with an exhaust channel communicated with the scroll cavity, the fixed scroll disk is provided with a silencing cavity arranged around the periphery of the exhaust channel, and the silencing cavity and the exhaust channel are arranged at intervals; wherein, the static vortex disc is provided with an air inlet channel communicated with the silencing cavity, and the static vortex disc is provided with an air inlet hole communicated with the silencing cavity and the vortex cavity.

Further, the fixed scroll comprises a first fixed scroll split body and a second fixed scroll split body, a scroll plate used for being matched with the movable scroll is arranged at the first end of the first fixed scroll split body, and the first end of the second fixed scroll split body is connected with the second end of the first fixed scroll split body; the silencing cavity is formed by a first fixed scroll plate split body and a second fixed scroll plate split body; the air inlet channel is arranged on the first fixed scroll split body and/or the second fixed scroll split body.

Furthermore, a silencing groove which is annularly arranged is arranged on the end surface of the second end of the first fixed vortex disk split body, a silencing cavity is formed by the silencing groove and the end surface of the first end of the second fixed vortex disk split body, and an air inlet hole is formed in the bottom wall of the silencing groove; or the end surface of the first end of the second fixed scroll disk split body is provided with a silencing groove which is annularly arranged, the silencing groove and the end surface of the second end of the first fixed scroll disk split body form a silencing cavity, and the end surface of the second end of the first fixed scroll disk split body is provided with an air inlet hole; or the end surface of the second end of the first fixed scroll disk split body is provided with a first silencing groove which is annularly arranged, the end surface of the first end of the second fixed scroll disk split body is provided with a second silencing groove which is annularly arranged, the first silencing groove is in butt joint with the second silencing groove to form a silencing cavity, and the bottom wall of the first silencing groove is provided with an air inlet hole.

Furthermore, an air inlet groove which extends along the radial direction of the outer peripheral wall of the first fixed vortex disk split body and is communicated with the silencing cavity is formed in the outer peripheral wall of the first fixed vortex disk split body, and an air inlet channel is formed by the air inlet groove and the end face of the first end of the second fixed vortex disk split body; or the peripheral wall of the second fixed vortex disk split body is provided with an air inlet groove which extends along the radial direction of the second fixed vortex disk split body and is communicated with the silencing cavity, and the air inlet groove and the end surface of the second end of the first fixed vortex disk split body form an air inlet channel; or the peripheral wall of the first static vortex disk split body is provided with a first air inlet groove which extends along the radial direction of the first static vortex disk split body and is communicated with the silencing cavity, the peripheral wall of the second static vortex disk split body is provided with a second air inlet groove which extends along the radial direction of the second static vortex disk split body and is communicated with the silencing cavity, and the first air inlet groove and the second air inlet groove are butted to form an air inlet channel.

Further, the silencing cavity is of a circular ring structure, the fixed scroll disc comprises a protruding portion, the protruding portion is arranged on the outer peripheral wall of the silencing cavity and extends along the radial direction of the fixed scroll disc, and the protruding portions are arranged at intervals along the circumferential direction of the silencing cavity so as to divide the silencing cavity into a plurality of communicated silencing areas.

Furthermore, the projection of the protruding part on the radial section of the fixed scroll comprises a first straight line segment, a second straight line segment and a first arc line segment which are sequentially connected end to end, the first arc line segment is connected with the outer peripheral wall of the sound attenuation cavity, and the intersection point of the first straight line segment and the second straight line segment is located on the central line of the first arc line segment.

Further, the projection of the outer peripheral wall of the sound-deadening chamber on the radial section of the fixed scroll includes: the curve line segment comprises a plurality of second arc line segments which are sequentially connected, and each second arc line segment is arranged towards one side of the inner peripheral wall of the silencing cavity in a protruding mode; two ends of the third straight line section are respectively connected with two ends of the curve line section; the air inlet channel and the third straight line section are located on the same side of the exhaust channel, and the center line of the air inlet channel passes through the middle point of the third straight line section.

Further, the projection of the outer peripheral wall of the sound-deadening chamber on the radial section of the fixed scroll includes: the third arc line segment and the fourth straight line segment are oppositely arranged; the first curve segment and the second curve segment are oppositely arranged, and two ends of the first curve segment are respectively connected with the first end of the third circular arc segment and the first end of the fourth straight segment; two ends of the second curve segment are respectively connected with the second end of the third circular arc segment and the second end of the fourth straight segment; the air inlet channel and the fourth straight line section are positioned on the same side of the exhaust channel, and the center line of the air inlet channel and the center point of the fourth straight line section are located; the distance between the first and second curved sections increases progressively in a direction away from the intake passage.

Furthermore, a first connecting hole is formed in the end face of the second end of the first fixed scroll plate split body, and a plurality of first connecting holes are arranged around the periphery of the silencing cavity at intervals; the second fixed scroll plate split body is provided with a plurality of second connecting holes, and the plurality of second connecting holes and the plurality of first connecting holes are arranged in a one-to-one correspondence manner; the scroll compressor also comprises a plurality of connecting pieces, and each second connecting hole and the first connecting hole corresponding to the second connecting hole are provided with one connecting piece in a penetrating way.

Further, when the first fixed scroll part has a silencing groove, the scroll compressor further includes: the sealing gasket is arranged between the end face of the second end of the first fixed scroll plate split body and the end face of the first end of the second fixed scroll plate split body, and a yielding hole communicated with the exhaust channel is formed in the sealing gasket; the sealing gasket is provided with a yielding groove communicated with the air inlet channel.

Further, the scroll compressor further includes: one end of the gas injection pipe extends into the gas inlet channel, and the other end of the gas injection pipe extends out of the shell so as to inject gas into the silencing cavity through the gas injection pipe; the first sealing ring is arranged between the outer peripheral wall of the gas ejector pipe and the inner peripheral wall of the gas inlet channel.

Furthermore, the shell is provided with a mounting hole which is arranged opposite to the air inlet channel; the scroll compressor further includes: the connecting pipe penetrates through the mounting hole and is connected with the shell; the other end of the gas ejector pipe penetrates out of the shell from the inside of the connecting pipe; and the second sealing ring is arranged between the inner peripheral wall of the connecting pipe and the outer peripheral wall of the gas injection pipe.

Further, the gas injection pipe comprises a straight pipe part, and a first annular bulge and a second annular bulge which are arranged on the straight pipe part, wherein the first annular bulge is arranged between the outer peripheral wall of the straight pipe part and the inner peripheral wall of the air inlet channel, and a first mounting groove for mounting a first sealing ring is arranged on the first annular bulge; the second annular bulge is arranged between the outer peripheral wall of the straight pipe part and the inner peripheral wall of the connecting pipe, and a second mounting groove for mounting a second sealing ring is formed in the second annular bulge.

Further, the scroll compressor further includes: the limiting seat is sleeved on the gas ejector pipe and is in threaded connection with the inner circumferential wall of the connecting pipe, and the first end of the limiting seat extends into the connecting pipe and is abutted against the second annular bulge.

Further, when the first fixed scroll plate split body is provided with a silencing groove, a first cylindrical part is formed in the middle of the silencing groove, a first exhaust hole extending along the axial direction of the first cylindrical part is formed in the first cylindrical part, a second exhaust hole opposite to the first exhaust hole is formed in the end face of the first end of the second fixed scroll plate split body, and the first exhaust hole and the second exhaust hole form an exhaust channel together.

According to another aspect of the present invention, a refrigeration system is provided, the refrigeration system includes a compressor, a condenser, a subcooler, a first throttle valve and an evaporator connected by a circulation pipeline, the compressor is the above scroll compressor; the refrigeration system also comprises an air injection pipeline which is communicated with an air inlet channel of the scroll compressor.

Furthermore, the gas injection pipeline comprises a first gas injection pipeline, one end of the first gas injection pipeline is connected with the circulating pipeline, a connecting point of the first gas injection pipeline and the circulating pipeline is positioned between the condenser and the subcooler, and the other end of the first gas injection pipeline is communicated with the silencing cavity of the scroll compressor after passing through the subcooler; the refrigeration system also comprises a temperature control switch, and the temperature control switch is arranged on the first gas injection pipeline; the air injection pipeline also comprises a second air injection pipeline, one end of the second air injection pipeline is connected with the circulating pipeline, and the connection point of the second air injection pipeline and the circulating pipeline is positioned between the compressor and the condenser; the other end of the second gas injection pipeline is connected with the first gas injection pipeline and is positioned between the temperature control switch and the compressor; when the temperature of the gas in the first gas injection pipeline is higher than the preset temperature, the temperature control switch is turned on, and the gas flowing out of the compressor flows into the gas inlet channel through the circulating pipeline and the first gas injection pipeline; when the problem of the gas in the first gas injection pipeline is lower than the preset temperature, the temperature control switch is closed, and the gas flowing out of the compressor flows into the gas inlet channel through the circulating pipeline, the second gas injection pipeline and the first gas injection pipeline.

By applying the technical scheme of the invention, the structure of the static vortex disc is changed, so that the flow path of gas is changed, the gas firstly enters the silencing cavity through the gas inlet channel, then enters the vortex cavity through the gas inlet hole, and finally is discharged out of the vortex cavity through the gas outlet channel. Because the silencing cavity is arranged in the middle of the static vortex disc, gas is prevented from directly entering the vortex cavity, abnormal noise is avoided, and the using performance of the vortex compressor is promoted.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view illustrating a compressor according to a first embodiment of the present invention;

FIG. 2 shows an enlarged schematic view of the structure at A in FIG. 1;

fig. 3 is a schematic view illustrating a disassembled structure of a first fixed scroll division body, a second fixed scroll division body and a sealing gasket of the compressor in fig. 1;

fig. 4 is a schematic top view illustrating a first fixed scroll division body of fig. 3;

FIG. 5 shows a schematic structural view of a gas lance of the compressor in FIG. 1;

fig. 6 is a schematic top view showing a first fixed scroll split body in the second embodiment;

fig. 7 is a schematic top view showing a first fixed scroll split body in a third embodiment;

FIG. 8 shows a process flow diagram of a refrigeration system;

FIG. 9 shows a process flow diagram of the refrigeration system with the thermostatic switch of FIG. 8 in a closed state;

fig. 10 shows a process flow diagram of the refrigeration system with the thermostat of fig. 8 in an on state.

Wherein the figures include the following reference numerals:

1. a compressor; 10. a housing; 11. an upper housing; 12. a lower housing; 13. an upper cover; 14. a lower cover; 111. mounting holes; 112. a high pressure chamber; 20. a static scroll pan; 201. an exhaust passage; 202. a sound-deadening chamber; 203. an air intake passage; 204. an air inlet; 205. a sound deadening region; 206. a first exhaust port; 207. a second vent hole; 21. a first fixed scroll plate split body; 210. a scroll plate; 220. a first cylindrical portion; 230. a second cylindrical portion; 231. a medium pressure hole; 211. a silencing groove; 212. a first air inlet groove; 213. a second arc segment; 214. a fillet structure; 215. a third straight line segment; 216. a third arc segment; 217. a fourth straight line segment; 218. a first curve segment; 219. a second curve segment; 22. a second fixed scroll split body; 221. a second air inlet groove; 222. a first connection hole; 223. a second connection hole; 23. a projection; 301. a first straight line segment; 302. a second straight line segment; 303. a first arc segment; 30. a movable scroll pan; 31. a vortex chamber; 40. a connecting member; 50. sealing gaskets; 51. a hole of abdication; 52. a third connection hole; 53. a yielding groove; 54. avoiding holes; 60. a gas ejector tube; 61. a straight tube portion; 62. a first annular projection; 621. a first mounting groove; 63. a second annular projection; 631. a second mounting groove; 70. a first seal ring; 80. a connecting pipe; 90. a second seal ring; 100. a limiting seat; 110. a partition plate; 120. a cross slip ring; 131. an upper bracket; 132. an upper bracket support plate; 133. a lower bracket; 140. a motor; 141. a stator; 142. a rotor; 150. a lower support ring; 160. a lower bearing; 170. a crankshaft; 180. an eccentric sleeve; 190. a sealing cover; 200. an exhaust valve; 2. a condenser; 3. a subcooler; 4. a first throttle valve; 5. an evaporator; 6. a second throttle valve; 7. a temperature control switch; 101. a circulation line; 102. a first gas injection line; 103. a second gas injection line.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a scroll compressor and a refrigeration system, aiming at solving the problem that the scroll compressor in the prior art has noise during air injection compensation.

Example one

As shown in fig. 1 to 5, the scroll compressor includes a housing 10, a fixed scroll 20 and an orbiting scroll 30, the fixed scroll 20 being disposed in the housing 10, the orbiting scroll 30 being movably disposed in the fixed scroll 20, a scroll chamber 31 being formed between the fixed scroll 20 and the orbiting scroll 30; the fixed scroll 20 has an exhaust passage 201 for communicating with the scroll chamber 31, the fixed scroll 20 has a sound-deadening chamber 202 provided around the outer circumference of the exhaust passage 201, the sound-deadening chamber 202 being provided at a distance from the exhaust passage 201; wherein, the fixed scroll 20 is provided with an air inlet channel 203 communicated with the silencing cavity 202, and the fixed scroll 20 is provided with an air inlet hole 204 communicated with both the silencing cavity 202 and the scroll cavity 31.

In the present embodiment, the structure of the fixed scroll 20 is changed, so that the flow path of the gas is changed to enter the silencing chamber 202 through the air inlet channel 203, then enter the scroll chamber 31 through the air inlet hole 204, and finally be discharged out of the scroll chamber 31 through the air outlet channel 201. Because the middle part of the fixed scroll 20 is provided with the silencing cavity 202, gas is prevented from directly entering the scroll cavity 31, thereby avoiding generating abnormal noise and further being beneficial to improving the service performance of the scroll compressor.

In this embodiment, the sound-deadening chamber 202 is provided to extend the gas flow path, thereby buffering the injected gas and effectively reducing the generation of noise.

As shown in fig. 1 to 3, the fixed scroll 20 includes a first fixed scroll part 21 and a second fixed scroll part 22, a first end of the first fixed scroll part 21 having a scroll plate 210 for being engaged with the orbiting scroll 30, and a first end of the second fixed scroll part 22 connected with a second end of the first fixed scroll part 21; the silencing cavity 202 is formed by a first fixed scroll split body 21 and a second fixed scroll split body 22; the intake passage 203 is provided on the first fixed scroll division body 21 and/or the second fixed scroll division body 22. In order to facilitate the processing of the muffling chamber 202 and the air intake passage 203, the fixed scroll 20 is designed to be divided into a first fixed scroll part 21 and a second fixed scroll part 22.

As shown in fig. 1 and 3, a silencing groove 211 is annularly formed on an end surface of the second end of the first fixed scroll part 21, a silencing cavity 202 is formed by the silencing groove 211 and an end surface of the first end of the second fixed scroll part 22, and an air inlet hole 204 is formed on a groove bottom wall of the silencing groove 211. Thus, the second fixed scroll part 22 has a simple structure, and the annular silencing groove 211 can be easily formed in the first fixed scroll part 21.

In an alternative embodiment of the present application, which is not shown in the drawings, a silencing groove 211 is formed on an end surface of a first end of the second fixed scroll part 22 in an annular shape, the silencing groove 211 and an end surface of a second end of the first fixed scroll part 21 form a silencing chamber 202, and an air inlet hole 204 is formed on an end surface of a second end of the first fixed scroll part 21. Thus, the first fixed scroll part 21 has a simple structure, and the annular silencing groove 211 can be easily formed in the second fixed scroll part 22.

In another alternative embodiment, not shown in the figures, a first annular silencing groove is formed on the end surface of the second end of the first fixed scroll part 21, a second annular silencing groove is formed on the end surface of the first end of the second fixed scroll part 22, the first silencing groove and the second silencing groove are in butt joint to form a silencing cavity 202, and an air inlet hole 204 is formed in the wall of the groove bottom of the first silencing groove. Thus, the annular sound-deadening chamber 202 can be easily formed in the second fixed scroll part 22.

As shown in fig. 1 to 3, a first air inlet groove 212 extending along a radial direction of the first fixed scroll part 21 and communicating with the sound deadening chamber 202 is formed in an outer circumferential wall thereof, a second air inlet groove 221 extending along a radial direction of the second fixed scroll part 22 and communicating with the sound deadening chamber 202 is formed in an outer circumferential wall thereof, and the first air inlet groove 212 and the second air inlet groove 221 are butted to form the air inlet passage 203. Thus, the processing of the intake passage 203 is facilitated.

In an alternative embodiment of the present application, which is not shown in the drawings, an air inlet groove extending in a radial direction of the outer peripheral wall of the first fixed scroll split body 21 and communicating with the sound-deadening chamber 202 is formed in the outer peripheral wall, and the air inlet groove and an end surface of the first end of the second fixed scroll split body 22 form an air inlet passage 203. Thus, the second fixed scroll part 22 has a simple structure, and the first fixed scroll part 21 can be easily provided with the air inlet groove extending in the radial direction thereof.

In another alternative embodiment, not shown, an air inlet groove is formed in the outer circumferential wall of the second fixed scroll part 22, extending in the radial direction thereof, and communicating with the sound-deadening chamber 202, and the air inlet groove and the end surface of the second end of the first fixed scroll part 21 form an air inlet passage 203. Thus, the first fixed scroll part 21 has a simple structure, and the second fixed scroll part 22 can be easily provided with an air inlet groove extending in the radial direction thereof.

As shown in fig. 3 and 4, the sound-deadening chamber 202 has a circular ring structure, the fixed scroll 20 includes a projection 23, the projection 23 is provided on the outer circumferential wall of the sound-deadening chamber 202 and extends in the radial direction of the fixed scroll 20, and a plurality of projections 23 are provided at intervals in the circumferential direction of the sound-deadening chamber 202 to partition the sound-deadening chamber 202 into a plurality of sound-deadening regions 205 that communicate with each other. In this way, the noise of the gas injected into the sound-deadening chamber 202 from the air intake path 203 is reduced by the plurality of sound-deadening regions 205, and the flow path of the gas is guided by the plurality of sound-deadening regions 205, thereby achieving a better sound-deadening effect. In this embodiment, the volume of the sound-deadening chamber 202 is large, and the sound-deadening effect is better.

Alternatively, the second fixed scroll division body 22 and the boss 23 are of an integral structure. Thus, the connection stability between the second fixed scroll part 22 and the protrusion 23 is improved, and the scroll compressor is conveniently processed and assembled.

As shown in fig. 3 and 4, a projection of the protruding portion 23 on a radial cross section of the fixed scroll 20 includes a first straight line segment 301, a second straight line segment 302, and a first arc line segment 303 connected end to end in this order, the first arc line segment 303 is connected to the outer circumferential wall of the sound deadening chamber 202, and an intersection point of the first straight line segment 301 and the second straight line segment 302 is located on a center line of the first arc line segment 303. In this way, by optimizing the structure of projecting portion 23, the volume of sound deadening chamber 202 and the volume of each sound deadening region 205 are made as large as possible, thereby contributing to the enhancement of the sound deadening effect.

Optionally, the first straight line segment 301 is rounded off from the outer peripheral wall of the sound-deadening chamber 202; second linear section 302 is radiused to the outer peripheral wall of sound-deadening chamber 202.

As shown in fig. 3, a first connection hole 222 is provided on an end surface of the second end of the first fixed scroll division body 21, and a plurality of first connection holes 222 are provided at intervals around the outer circumference of the sound-deadening chamber 202; a plurality of second connection holes 223 are formed on the second fixed scroll part 22, and the plurality of second connection holes 223 are arranged in one-to-one correspondence with the plurality of first connection holes 222; the scroll compressor further includes a plurality of coupling members 40, and one coupling member 40 is perforated in each of the second coupling holes 223 and the first coupling holes 222 corresponding thereto. In this way, the first fixed scroll part 21 and the second fixed scroll part 22 are fixedly connected by the connection member 40, so that the assembly of the fixed scroll 20 is simple, convenient and efficient.

As shown in fig. 1 and 3, when the first fixed scroll part 21 has the silencing groove 211, the scroll compressor further includes a sealing gasket 50, the sealing gasket 50 is disposed between an end surface of the second end of the first fixed scroll part 21 and an end surface of the first end of the second fixed scroll part 22, and the sealing gasket 50 is provided with a relief hole 51 communicating with the exhaust passage 201; the gasket 50 is provided with a relief groove 53 for communicating with the intake passage 203. In this way, the first and second split fixed scroll members 21 and 22 are sealed by the sealing gasket 50, thereby improving the sealing performance of the compressor and preventing gas entering the muffling chamber 202 through the gas inlet passage 203 from leaking.

As shown in fig. 3, the sealing gasket 50 is further provided with a plurality of third connection holes 52, the plurality of third connection holes 52 are disposed in one-to-one correspondence with the plurality of first connection holes 222, and each of the first connection holes 222, the second connection holes 223 corresponding thereto, and the third connection holes 52 is provided with a connection member 40. In this way, the first fixed scroll part 21, the second fixed scroll part 22 and the sealing gasket 50 are connected together by the connecting piece 40, the assembly is simple, convenient and efficient, and the sealing gasket 50 is tightly pressed between the first fixed scroll part 21 and the second fixed scroll part 22, thereby achieving the effect of axial sealing on the sound-absorbing cavity 202.

Alternatively, the first connection hole 222 is a threaded hole and the connection member 40 is a screw.

As shown in fig. 2, 3 and 5, the scroll compressor further includes a gas nozzle 60 and a first sealing ring 70, one end of the gas nozzle 60 extends into the air inlet channel 203, the other end of the gas nozzle 60 extends out of the casing 10 to inject gas into the sound-deadening chamber 202 through the gas nozzle 60, and the first sealing ring 70 is disposed between the outer circumferential wall of the gas nozzle 60 and the inner circumferential wall of the air inlet channel 203. In this way, the gas injection pipe 60 is used to inject gas into the silencing cavity 202, and the gas injection pipe 60 and the fixed scroll 20 are sealed by the first sealing ring 70, so as to avoid gas leakage and further improve the sealing performance of the scroll compressor. Meanwhile, the other end of the gas lance 60 extends out of the housing 10, facilitating the connection of the gas lance 60 to the piping located outside the housing 10 of the scroll compressor.

As shown in fig. 2, 3 and 5, the housing 10 is provided with a mounting hole 111 disposed opposite to the air intake passage 203; the scroll compressor further comprises a connecting pipe 80 and a second sealing ring 90, wherein the connecting pipe 80 is arranged at the mounting hole 111 in a penetrating way and is connected with the shell 10; the other end of the gas injection pipe 60 penetrates out of the housing 10 from the inside of the connecting pipe 80, and the second sealing ring 90 is disposed between the inner peripheral wall of the connecting pipe 80 and the outer peripheral wall of the gas injection pipe 60. In this way, the gas nozzle 60 is connected to the housing 10 through the connection pipe 80, which is beneficial to improving the connection stability between the gas nozzle 60 and the housing 10; meanwhile, the second sealing ring 90 is arranged to seal between the gas injection pipe 60 and the connecting pipe 80, so as to prevent gas from leaking out of the shell 10, and further improve the sealing performance of the scroll compressor.

Alternatively, the connection pipe 80 is a copper pipe, and the connection pipe 80 is welded to the housing 10.

As shown in fig. 2, 3 and 5, the air blast pipe 60 comprises a straight pipe portion 61 and a first annular projection 62 and a second annular projection 63 provided on the straight pipe portion 61, the first annular projection 62 being provided between the outer peripheral wall of the straight pipe portion 61 and the inner peripheral wall of the air intake passage 203, the first annular projection 62 being provided with a first mounting groove 621 for mounting the first seal ring 70; the second annular projection 63 is provided between the outer peripheral wall of the straight tube portion 61 and the inner peripheral wall of the connecting tube 80, and a second mounting groove 631 for mounting the second seal ring 90 is provided on the second annular projection 63. Thus, by optimizing the structure of the gas lance 60, the installation of the first seal ring 70 and the second seal ring 90 is facilitated, and the sealing performance of the scroll compressor is improved. Meanwhile, the arrangement of the first and second annular bosses 62 and 63 is also advantageous to reduce friction between the gas nozzle 60 and the fixed scroll 20 and the connection pipe 80 during assembly.

Thus, the first seal ring 70 is fitted into the first mounting groove 621, and the second seal ring 90 is fitted into the second mounting groove 631, so that the gas lance 60 is radially sealed.

In an alternative embodiment shown in fig. 2, the first inlet groove 212 and the second inlet groove 221 interface to form an inlet passage 203 that is adapted to the first annular projection 62.

As shown in fig. 2, the scroll compressor further includes a limiting seat 100, the limiting seat 100 is sleeved on the gas ejector tube 60 and is in threaded connection with the inner peripheral wall of the connecting tube 80, and a first end of the limiting seat 100 extends into the connecting tube 80 and abuts against the second annular protrusion 63 to limit the axial direction of the gas ejector tube 60. Like this, through the setting of spacing seat 100, can effectively avoid jet-propelled pipe 60 to deviate from outside shell 10 in by connecting pipe 80, be favorable to promoting jet-propelled pipe 60's connection stability.

As shown in fig. 3 and 4, when the first fixed scroll part 21 has the silencing groove 211, a first cylindrical portion 220 is formed at the middle of the silencing groove 211, a first exhaust hole 206 extending in the axial direction of the first cylindrical portion 220 is formed on the first cylindrical portion 220, a second exhaust hole 207 disposed opposite to the first exhaust hole 206 is formed on the end surface of the first end of the second fixed scroll part 22, and the first exhaust hole 206 and the second exhaust hole 207 together form an exhaust passage 201. Since the first cylindrical portion 220 abuts against the end surface of the first end of the second fixed scroll split body 22, the gas entering the sound-deadening chamber 202 from the gas inlet passage 203 can be prevented from entering the scroll chamber 31 through the gas outlet passage 201.

As shown in fig. 3 and 4, when the first fixed scroll part 21 has the muffling groove 211, the first fixed scroll part further has a second cylindrical portion 230, the second cylindrical portion 230 is disposed on the groove bottom wall of the muffling groove 211 and is spaced apart from the first cylindrical portion 220, and the second cylindrical portion 230 is provided with an intermediate-pressure hole 231 extending in the axial direction thereof; the sealing gasket 50 is further provided with an avoiding hole 54 opposite to the middle pressure hole 231.

As shown in FIG. 1, the scroll compressor further includes a motor 140,

As shown in fig. 1, the scroll compressor further includes a partition plate 110, a oldham ring 120, an upper bracket 131, an upper bracket support plate 132, a lower bracket 133, a motor 140, a lower support ring 150, a lower bearing 160, a crankshaft 170, an eccentric sleeve 180, a sealing cover 190, and a discharge valve 200. The housing 10 includes an upper housing 11, a lower housing 12, an upper cover 13 and a lower cover 14, and the upper housing 11 is provided with a mounting hole 111; the motor 140 includes a stator 141 and a rotor 142, the stator 141 is fixed on the lower case 12 through the lower bracket 133, and the rotor 142 is fixedly connected with one end of the crankshaft 170; the upper bracket 131 is fixed on the lower housing 12 by interference fit and axial thrust, the upper bracket support plate 132 is connected with the upper bracket 131, the movable scroll 30 and the fixed scroll 20 are oppositely arranged on the upper bracket support plate 132 with a phase angle difference of 180 degrees, and the other end of the crankshaft 170 is in driving connection with the movable scroll 30 through the eccentric sleeve 180. The rotor 142 drives the crankshaft 170 to drive the movable scroll 30 to rotate relative to the fixed scroll 20, and the movable scroll 30 and the fixed scroll 20 are engaged to form a series of crescent closed cavities which are isolated from each other and continuously change in volume, namely the scroll cavity 31. The partition plate 110 and the upper cover 13 are fixed to the upper case 11 by welding, a high pressure chamber 112 is formed between the partition plate 110 and the upper cover 13, and the upper case 11 and the lower case 12 are fixed together by welding. The sealing cover 190 is installed at the second end of the second fixed scroll part 22 to be coupled, the sealing cover 190 may float axially during the operation of the scroll compressor, and the sealing cover 190 forms a sealed coupling passage with the partition plate 110. The fixed scroll 20 has axial flexibility, i.e. can axially float, in the normal operation of the scroll compressor, an intermediate pressure cavity is formed between the sealing cover 190 of the fixed scroll 20 and the end surface of the second end of the second fixed scroll part 22, the fixed scroll 20 is tightly pressed on the movable scroll 30 under the action of the axial force of gas in the intermediate pressure cavity, the movable scroll 30 is tightly pressed on the upper bracket supporting plate 132 on the upper bracket 131 due to the action of high-pressure gas in the scroll cavity 31 and the action force of the fixed scroll 20, and the upper bracket supporting plate 132 is fixed on the upper bracket 131 through screws.

When the compressor is operated, the motor 140 drives the crankshaft 170 to rotate, the crank of the crankshaft 170 is provided with the eccentric sleeve 180 with radial flexibility, the eccentric sleeve 180 drives the movable scroll 30 to move, and the movable scroll 30 makes translational motion around the center of the crankshaft 170 with a fixed radius under the limitation of autorotation prevention of the cross slip ring 120. The refrigerant introduced from the outside of the compressor is sucked into a crescent scroll chamber 31 formed between the orbiting scroll 30 and the first fixed scroll part 21, is compressed, is introduced into the high pressure chamber 112 through the second discharge hole 207 of the second fixed scroll part 22 and the discharge valve 200, and is discharged through the discharge pipe.

Example two

The second embodiment differs from the first embodiment only in the shape and size of sound-deadening chamber 202. As shown in fig. 6, a projection of the outer circumferential wall of the sound-deadening chamber 202 on a radial cross section of the fixed scroll 20 includes a curved line segment including a plurality of second arc line segments 213 connected in sequence, each of the second arc line segments 213 is provided to protrude toward one side of the inner circumferential wall of the sound-deadening chamber 202, and both ends of the third straight line segment 215 are connected to both ends of the curved line segment, respectively; wherein the intake passage 203 and the third straight line segment 215 are located on the same side of the exhaust passage 201, and the center line of the intake passage 203 passes through the midpoint of the third straight line segment 215. In this embodiment, the arrangement of the plurality of second arc segments 213 promotes the diversion effect on the gas, thereby promoting the noise reduction effect.

In particular, the shape and size of the sound-absorbing cavity 202 can be flexibly selected according to the actual use requirement.

Alternatively, sound-deadening chamber 202 is quadrilateral in shape.

In the alternative embodiment shown in fig. 6 of the present application, the curved line segment includes four second arc segments 213.

Optionally, a fillet structure 214 is arranged between the two connected second circular arc line sections 213, so as to further improve the flow guiding effect on the gas, and thus improve the sound attenuation effect. In addition, the sound-deadening chamber 202 provided by the present embodiment is easy to manufacture.

EXAMPLE III

The third embodiment differs from the first embodiment only in the shape and size of sound-deadening chamber 202. As shown in fig. 7, a projection of the outer peripheral wall of the sound-deadening chamber 202 on a radial section of the fixed scroll 20 includes a third arc line segment 216 and a fourth straight line segment 217 which are oppositely arranged, and a first curved segment 218 and a second curved segment 219 which are oppositely arranged, both ends of the first curved segment 218 are respectively connected with a first end of the third arc line segment 216 and a first end of the fourth straight line segment 217; two ends of the second curved line segment 219 are respectively connected with the second end of the third circular arc line segment 216 and the second end of the fourth straight line segment 217; wherein, the intake channel 203 and the fourth straight line segment 217 are positioned on the same side of the exhaust channel 201, and the center line of the intake channel 203 and the midpoint of the fourth straight line segment 217 are passed through; the distance between the first curved section 218 and the second curved section 219 increases in a direction away from the intake passage 203. Experiments have shown that the sound-damping effect of the sound-damping chamber 202 is better when the distance between the first curved section 218 and the second curved section 219 is gradually increased.

In the present application, the distance between the first curved line segment 218 and the second curved line segment 219 refers to the distance between the first curved line segment 218 and the second curved line segment 219 in a direction parallel to the fourth straight line segment 217.

In particular, the shape and size of the sound-absorbing cavity 202 can be flexibly selected according to the actual use requirement.

Optionally, the sound-deadening chamber 202 is disposed in an ellipse-like shape.

As shown in fig. 8 to 10, the present application also provides a refrigeration system including a compressor 1, a condenser 2, a subcooler 3, a first throttle valve 4 and an evaporator 5 connected by a circulation line 101, the compressor 1 being a scroll compressor as described above and below; the refrigeration system also includes an air injection line in communication with the air intake passage 203 of the scroll compressor. Because the scroll compressor's that this application provided noise is less to make the refrigerating system's that this application provided use noise less, be favorable to promoting refrigerating system's performance.

Optionally, a temperature control switch 7 is arranged on the gas injection pipeline, the gas injection pipeline is automatically controlled to be switched on and off through the temperature control switch 7, and when the temperature of gas in the gas injection pipeline is higher than a preset temperature, the temperature control switch 7 is in an on state to realize gas injection; when the temperature of the gas in the gas injection pipeline is at a first preset temperature, the temperature control switch 7 is in a closed state.

As shown in fig. 8, the gas injection pipeline includes a first gas injection pipeline 102, one end of the first gas injection pipeline 102 is connected to the circulation pipeline 101, a connection point of the first gas injection pipeline 102 and the circulation pipeline 101 is located between the condenser 2 and the subcooler 3, and the other end of the first gas injection pipeline 102 passes through the subcooler 3 and then is communicated with a sound-deadening cavity 202 of the scroll compressor; the refrigeration system further comprises a temperature control switch 7, and the temperature control switch 7 is arranged on the first gas injection pipeline 102; the gas injection pipeline further comprises a second gas injection pipeline 103, one end of the second gas injection pipeline 103 is connected with the circulating pipeline 101, and the connection point of the second gas injection pipeline 103 and the circulating pipeline 101 is positioned between the compressor 1 and the condenser 2; the other end of the second gas injection pipeline 103 is connected with the first gas injection pipeline 102 and is positioned between the temperature control switch 7 and the compressor 1; as shown in fig. 10, when the temperature of the gas in the first gas injection pipeline 102 is higher than a predetermined temperature, the temperature control switch 7 is turned on, and the gas flowing out of the compressor 1 flows into the gas inlet channel 203 through the circulation pipeline 101 and the first gas injection pipeline 102, so as to realize gas injection compensation; as shown in fig. 9, when the problem of the gas in the first gas injection pipeline 102 is lower than the predetermined temperature, the temperature control switch 7 is turned off, and the gas flowing out from the compressor 1 flows into the gas inlet passage 203 through the circulation pipeline 101, the second gas injection pipeline 103 and the first gas injection pipeline 102, so that the automatic gas injection compensation is realized. In this way, the opening and closing of the injection line is automatically controlled by the temperature control switch 7, and the opening and closing of the second injection line 103 is automatically controlled by the discharge temperature of the scroll compressor.

Optionally, the temperature control switch 7 is a bimetallic strip, and when the temperature of the gas in the second gas injection pipeline 103 is higher than a predetermined temperature, the bimetallic strip is heated to act, and the first gas injection pipeline 102 is in a conducting state, so as to realize gas injection compensation; when the temperature of the gas in the second gas injection pipeline 103 is at the first predetermined temperature, the first gas injection pipeline 102 is in a non-conducting state to realize automatic gas injection compensation.

As shown in fig. 8, the refrigeration system further includes a second throttling valve 6, and the second throttling valve 6 is disposed on the first ejector line 102 upstream of the subcooler 3 in the circulation direction of the refrigerant. In this way, the refrigerant flowing out of the condenser 2 is throttled by the second throttle 6, cooled by the subcooler 3, and then flows into the muffler chamber 202 of the scroll compressor.

The application provides a scroll compressor has simple structure, small, the quality is light, the noise is low, mechanical efficiency and advantages such as operate steadily. When the scroll compressor works under a working condition with a large pressure ratio, the heating capacity is compensated by adopting an air injection mode in the use process of the scroll compressor; the temperature control switch 7 is utilized to realize automatic control, the control structure is simple, and the complexity of the air injection pipeline can be effectively reduced.

When the enhanced vapor injection mode compensates performance and reliability of the scroll compressor, gas enters the silencing cavity 202 through the gas injection pipe 60, then enters the scroll cavity 31 through the gas inlet hole 204, and then enters the high-pressure cavity 112 through the exhaust channel 201 after being compressed by the scroll cavity 31, so that the gas is prevented from directly entering the scroll cavity 31, and abnormal noise generated by the scroll compressor in the using process is reduced.

When the refrigerating system operates, a refrigerant is discharged from the compressor 1 and then enters the condenser 2 through the second gas injection pipeline 103 and the circulating pipeline 101 which are connected in parallel, the refrigerant flows out of the condenser 2 and then is divided into two paths, one path of the refrigerant returns to the compressor 1 after passing through the subcooler 3, the first throttle valve 4 and the evaporator 5 along the circulating pipeline 101, the other path of the refrigerant passes through the first gas injection pipeline 102 and then is injected into the silencing cavity 202 of the compressor 1 after passing through the second throttle valve 6, the subcooler 3 and the temperature control switch 7, the silencing cavity 202 plays a role in buffering to achieve the functions of gas injection and noise reduction, and the refrigerant subjected to noise reduction is injected into the compressor vortex cavity 31 through the gas inlet 204 to achieve the purpose of gas supplement.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (17)

1. A scroll compressor comprising a housing (10), a fixed scroll (20) and an orbiting scroll (30), the fixed scroll (20) being disposed within the housing (10), the orbiting scroll (30) being movably disposed within the fixed scroll (20), a scroll chamber (31) being formed between the fixed scroll (20) and the orbiting scroll (30); it is characterized in that the preparation method is characterized in that,

the fixed scroll (20) is provided with an exhaust channel (201) communicated with the scroll cavity (31), the fixed scroll (20) is provided with a silencing cavity (202) arranged around the periphery of the exhaust channel (201), and the silencing cavity (202) is arranged at a distance from the exhaust channel (201);

wherein, be provided with on the fixed scroll dish (20) with noise elimination chamber (202) intercommunication air intake passage (203), be provided with on the fixed scroll dish (20) with noise elimination chamber (202) and vortex chamber (31) all communicate inlet port (204).

2. The scroll compressor according to claim 1, wherein the fixed scroll (20) includes a first fixed scroll part (21) and a second fixed scroll part (22), a first end of the first fixed scroll part (21) having a scroll plate (210) for being engaged with the orbiting scroll (30), a first end of the second fixed scroll part (22) being connected with a second end of the first fixed scroll part (21); the silencing cavity (202) is formed by the first fixed scroll split body (21) and the second fixed scroll split body (22) together; the intake passage (203) is provided on the first fixed scroll division body (21) and/or the second fixed scroll division body (22).

3. The scroll compressor of claim 2,

the end face of the second end of the first fixed scroll split body (21) is provided with a silencing groove (211) which is annularly arranged, the silencing groove (211) and the end face of the first end of the second fixed scroll split body (22) form a silencing cavity (202), and the wall of the groove bottom of the silencing groove (211) is provided with the air inlet hole (204); or

The end face of the first end of the second fixed scroll split body (22) is provided with a silencing groove (211) which is annularly arranged, the silencing groove (211) and the end face of the second end of the first fixed scroll split body (21) form a silencing cavity (202), and the end face of the second end of the first fixed scroll split body (21) is provided with the air inlet hole (204); or

The end face of the second end of the first fixed scroll disk split body (21) is provided with a first silencing groove in an annular arrangement, the end face of the first end of the second fixed scroll disk split body (22) is provided with a second silencing groove in an annular arrangement, the first silencing groove is in butt joint with the second silencing groove to form the silencing cavity (202), and the wall of the groove bottom of the first silencing groove is provided with the air inlet hole (204).

4. The scroll compressor of claim 2,

an air inlet groove which extends along the radial direction of the outer peripheral wall of the first fixed scroll plate split body (21) and is communicated with the silencing cavity (202) is formed in the outer peripheral wall of the first fixed scroll plate split body, and the air inlet groove and the end face of the first end of the second fixed scroll plate split body (22) form an air inlet channel (203); or

An air inlet groove which extends along the radial direction of the outer peripheral wall of the second fixed scroll plate split body (22) and is communicated with the silencing cavity (202) is formed in the outer peripheral wall of the second fixed scroll plate split body, and the air inlet groove and the end face of the second end of the first fixed scroll plate split body (21) form an air inlet channel (203); or

The outer peripheral wall of the first fixed scroll plate split body (21) is provided with a first air inlet groove (212) which extends along the radial direction of the first fixed scroll plate split body and is communicated with the silencing cavity (202), the outer peripheral wall of the second fixed scroll plate split body (22) is provided with a second air inlet groove (221) which extends along the radial direction of the second fixed scroll plate split body and is communicated with the silencing cavity (202), and the first air inlet groove (212) and the second air inlet groove (221) are butted to form the air inlet channel (203).

5. The scroll compressor of claim 1,

the silencing cavity (202) is of a circular ring structure, the fixed scroll (20) comprises a protruding part (23), the protruding part (23) is arranged on the outer peripheral wall of the silencing cavity (202) and extends along the radial direction of the fixed scroll (20), and the protruding parts (23) are arranged at intervals along the circumferential direction of the silencing cavity (202) to divide the silencing cavity (202) into a plurality of communicated silencing areas (205).

6. The scroll compressor according to claim 5, wherein a projection of the projection (23) on a radial section of the fixed scroll (20) includes a first straight line segment (301), a second straight line segment (302), and a first arc line segment (303) connected end to end in this order, the first arc line segment (303) being connected to an outer peripheral wall of the muffling chamber (202), an intersection point of the first straight line segment (301) and the second straight line segment (302) being located on a center line of the first arc line segment (303).

7. The scroll compressor of claim 1, wherein a projection of the outer peripheral wall of the sound-deadening chamber (202) on a radial cross section of the fixed scroll (20) includes:

the curve line segment comprises a plurality of second arc line segments (213) which are connected in sequence, and each second arc line segment (213) is arranged towards one side of the inner peripheral wall of the silencing cavity (202) in a protruding mode;

a third straight line segment (215), wherein two ends of the third straight line segment (215) are respectively connected with two ends of the curve line segment; wherein the intake passage (203) and the third straight line segment (215) are located on the same side of the exhaust passage (201), and the centerline of the intake passage (203) passes through the midpoint of the third straight line segment (215).

8. The scroll compressor of claim 1, wherein a projection of the outer peripheral wall of the sound-deadening chamber (202) on a radial cross section of the fixed scroll (20) includes:

a third arc line segment (216) and a fourth straight line segment (217) which are oppositely arranged;

a first curve section (218) and a second curve section (219) which are oppositely arranged, wherein two ends of the first curve section (218) are respectively connected with a first end of the third arc line section (216) and a first end of the fourth straight line section (217); two ends of the second curve segment (219) are respectively connected with the second end of the third arc segment (216) and the second end of the fourth straight segment (217);

wherein the intake passage (203) and the fourth straight line segment (217) are located on the same side of the exhaust passage (201), and the centerline of the intake passage (203) is aligned with a midpoint passing through the fourth straight line segment (217); the distance between the first curved section (218) and the second curved section (219) increases gradually in a direction away from the intake passage (203).

9. The scroll compressor of claim 2,

a first connecting hole (222) is formed in the end face of the second end of the first fixed scroll plate split body (21), and a plurality of first connecting holes (222) are arranged around the periphery of the sound attenuation cavity (202) at intervals;

a plurality of second connecting holes (223) are formed in the second fixed scroll split body (22), and the plurality of second connecting holes (223) and the plurality of first connecting holes (222) are arranged in a one-to-one correspondence manner;

the scroll compressor further comprises a plurality of connecting pieces (40), and one connecting piece (40) penetrates through each second connecting hole (223) and the corresponding first connecting hole (222).

10. The scroll compressor of claim 3, when the first fixed scroll division body (21) has the muffling groove (211), further comprising:

the sealing gasket (50) is arranged between the end face of the second end of the first fixed scroll split body (21) and the end face of the first end of the second fixed scroll split body (22), and a yielding hole (51) communicated with the exhaust channel (201) is formed in the sealing gasket (50); the sealing gasket (50) is provided with a yielding groove (53) communicated with the air inlet channel (203).

11. The scroll compressor of claim 1, further comprising:

one end of the gas injection pipe (60) extends into the gas inlet channel (203), and the other end of the gas injection pipe (60) extends out of the shell (10) so as to inject gas into the silencing cavity (202) through the gas injection pipe (60);

a first seal ring (70), the first seal ring (70) being disposed between an outer peripheral wall of the gas lance (60) and an inner peripheral wall of the gas inlet passage (203).

12. The scroll compressor of claim 11, wherein the housing (10) is provided with a mounting hole (111) disposed opposite the air inlet passage (203); the scroll compressor further includes:

the connecting pipe (80) penetrates through the mounting hole (111) and is connected with the shell (10); the other end of the gas ejector pipe (60) penetrates out of the shell (10) from the inside of the connecting pipe (80);

and the second sealing ring (90) is arranged between the inner peripheral wall of the connecting pipe (80) and the outer peripheral wall of the gas injection pipe (60).

13. The scroll compressor according to claim 12, wherein the gas lance (60) includes a straight tube portion (61) and first and second annular projections (62, 63) provided on the straight tube portion (61), the first annular projection (62) being provided between an outer peripheral wall of the straight tube portion (61) and an inner peripheral wall of the gas inlet passage (203), the first annular projection (62) being provided with a first mounting groove (621) for mounting the first seal ring (70); the second annular bulge (63) is arranged between the outer peripheral wall of the straight pipe part (61) and the inner peripheral wall of the connecting pipe (80), and a second mounting groove (631) for mounting the second sealing ring (90) is formed in the second annular bulge (63).

14. The scroll compressor of claim 13, further comprising:

spacing seat (100), spacing seat (100) cover is established jet-propelled pipe (60) go up and with the internal perisporium threaded connection of connecting pipe (80), the first end of spacing seat (100) stretches into in connecting pipe (80) and with the protruding (63) butt of second annular.

15. The scroll compressor of claim 3, wherein when the first fixed scroll part (21) has the muffling groove (211), a middle portion of the muffling groove (211) forms a first cylindrical portion (220), the first cylindrical portion (220) is provided with a first exhaust hole (206) extending in an axial direction thereof, an end surface of the first end of the second fixed scroll part (22) is provided with a second exhaust hole (207) disposed opposite to the first exhaust hole (206), and the first exhaust hole (206) and the second exhaust hole (207) together form the exhaust passage (201).

16. Refrigeration system comprising a compressor (1), a condenser (2), a subcooler (3), a first throttle valve (4) and an evaporator (5) connected by a circulation line (101), characterized in that the compressor (1) is a scroll compressor according to any one of claims 1 to 15; the refrigeration system further comprises an air injection pipeline which is communicated with an air inlet channel (203) of the scroll compressor.

17. The refrigerant system as set forth in claim 16,

the gas injection pipeline comprises a first gas injection pipeline (102), one end of the first gas injection pipeline (102) is connected with the circulating pipeline (101), the connection point of the first gas injection pipeline (102) and the circulating pipeline (101) is located between the condenser (2) and the subcooler (3), and the other end of the first gas injection pipeline (102) is communicated with a silencing cavity (202) of the scroll compressor after passing through the subcooler (3);

the refrigeration system further comprises a temperature control switch (7), and the temperature control switch (7) is arranged on the first gas injection pipeline (102);

the gas injection pipeline further comprises a second gas injection pipeline (103), one end of the second gas injection pipeline (103) is connected with the circulating pipeline (101), and the connection point of the second gas injection pipeline (103) and the circulating pipeline (101) is located between the compressor (1) and the condenser (2); the other end of the second gas injection pipeline (103) is connected with the first gas injection pipeline (102) and is positioned between the temperature control switch (7) and the compressor (1);

wherein, when the temperature of the gas in the first gas injection pipeline (102) is higher than the preset temperature, the temperature control switch (7) is opened, and the gas flowing out from the compressor (1) flows into the gas inlet channel (203) through the circulating pipeline (101) and the first gas injection pipeline (102); when the problem of the gas in the first gas injection pipeline (102) is lower than the preset temperature, the temperature control switch (7) is closed, and the gas flowing out of the compressor (1) flows into the gas inlet channel (203) through the circulating pipeline (101), the second gas injection pipeline (103) and the first gas injection pipeline (102).

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