CN115628215A

CN115628215A - Rotary compressor

Info

Publication number: CN115628215A
Application number: CN202210994879.0A
Authority: CN
Inventors: 吴旭昌; 邓志强; 郭莉娟; 叶容君
Original assignee: Guangdong Meizhi Precision Manufacturing Co Ltd
Current assignee: Guangdong Meizhi Precision Manufacturing Co Ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2023-01-20

Abstract

The invention discloses a rotary compressor, which comprises a shell assembly, a motor assembly and a pump body assembly, wherein the shell assembly is provided with an inner cavity and is provided with a supporting structure positioned in the inner cavity; the motor assembly is positioned in the inner cavity and connected to the supporting structure, and a gap is formed between the motor assembly and the inner wall of the inner cavity; and the pump body assembly is positioned in the inner cavity and connected to the supporting structure, and a gap is formed between the pump body assembly and the inner wall of the inner cavity. Because the motor assembly and the pump body assembly are connected to the supporting structure, the motor assembly and the pump body assembly are not in direct contact with the shell assembly, the vibration of the shell assembly caused by the swing frequency of the pump body assembly and the breathing mode frequency of the motor assembly can be improved, the vibration and radiation noise of the shell assembly of the compressor are improved, and the working noise of the compressor is reduced.

Description

Rotary compressor

Technical Field

The invention relates to the technical field of compressors, in particular to a rotary compressor.

Background

In the related art, a pump assembly of a rotary compressor is driven by a motor assembly and has a periodic suction-compression-discharge characteristic, and the pump assembly and the motor assembly are generally directly connected to a casing, so that vibration is transmitted to the casing and noise is radiated to the outside, resulting in a high operating noise of the compressor, which is to be improved.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a rotary compressor, which can improve the shell vibration of the compressor, thereby reducing the working noise of the compressor.

The rotary compressor comprises a shell assembly, a motor assembly and a pump body assembly, wherein the shell assembly is provided with an inner cavity and is provided with a supporting structure positioned in the inner cavity; the motor assembly is located in the internal cavity and connected to the support structure, and a gap is formed between the motor assembly and the inner wall of the internal cavity; the pump body assembly is located in the inner cavity and connected to the supporting structure, and a gap is formed between the pump body assembly and the inner wall of the inner cavity.

The rotary compressor according to the embodiment of the invention has at least the following beneficial effects: because the motor assembly and the pump body assembly are connected to the supporting structure, the motor assembly and the pump body assembly are not in direct contact with the shell assembly, the vibration of the shell assembly caused by the swing frequency of the pump body assembly and the breathing mode frequency of the motor assembly can be improved, the vibration and radiation noise of the shell assembly of the compressor are improved, and the working noise of the compressor is reduced.

According to some embodiments of the invention, a clearance between the motor assembly and the inner wall of the inner cavity is greater than or equal to 0.1mm, and a clearance between the pump body assembly and the inner wall of the inner cavity is greater than or equal to 0.1mm.

According to some embodiments of the invention, the support structure includes a first bracket, the motor assembly is connected to an upper end of the first bracket, and the pump body assembly is connected to a lower end of the first bracket.

According to some embodiments of the invention, the first bracket is provided with a plurality of circumferentially arranged support blocks abutting the motor assembly to support the motor assembly; or the first support is provided with a plurality of positioning blocks arranged circumferentially, and the motor assembly is provided with positioning grooves matched with the positioning blocks.

According to some embodiments of the invention, the support structure further comprises a second bracket located above the motor assembly, the motor assembly being connected to a lower end of the second bracket.

According to some embodiments of the invention, the motor assembly includes a stator coupled to the first bracket and the second bracket by fasteners.

According to some embodiments of the invention, the first bracket and the second bracket are each provided with a plurality of circumferentially arranged support blocks abutting the motor assembly to support the motor assembly; or the first support and the second support are provided with a plurality of positioning blocks which are circumferentially arranged, and the motor assembly is provided with positioning grooves matched with the positioning blocks.

According to some embodiments of the invention, the first bracket includes a mounting cylinder, and the pump body assembly is connected to the mounting cylinder by a plurality of fasteners, which are spaced apart along a circumference of the mounting cylinder.

According to some embodiments of the present invention, the housing assembly includes an upper housing, a main housing, and a lower housing, the main housing includes a first housing section and a second housing section, the outer wall of the first bracket is provided with a first supporting ring, and the first housing section and the second housing section are respectively connected to two axial ends of the first supporting ring.

According to some embodiments of the invention, a first spacer is provided between the first casing section and the first support ring, and a second spacer is provided between the second casing section and the first support ring.

According to some embodiments of the invention, the first and second housing sections are internally provided with a cavity.

According to some embodiments of the invention, the cavity is filled with a noise reducing filler.

According to some embodiments of the invention, the noise reducing filler is damping particles or porous acoustic wool.

According to some embodiments of the invention, the filling rate of the noise reducing filler in the cavity is 80% to 90%.

According to some embodiments of the invention, the main housing further comprises a third housing section, the support structure further comprises a second support, the motor assembly is connected to a lower end of the second support, a second support ring is arranged on an outer wall of the second support, and the second housing section and the third housing section are respectively connected to two axial ends of the second support ring.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a sectional view of a rotary compressor according to some embodiments of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a sectional view of a rotary compressor in accordance with other embodiments of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a schematic structural view of a first bracket according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a first bracket, a motor assembly and a second bracket according to an embodiment of the present invention;

fig. 7 is an exploded view of the first bracket, the motor assembly and the second bracket according to the embodiment of the invention.

The reference numbers are as follows:

the noise reduction structure comprises a shell assembly 100, an inner cavity 101, a cavity 102, an upper shell 110, a main shell 120, a first shell section 121, a second shell section 122, a third shell section 123, a lower shell 130 and noise reduction filler 140;

motor assembly 200, stator 210, positioning groove 211, rotor 220;

the pump body assembly 300, a cylinder 310, a compression cavity 311, a piston 320 and a rotating shaft 330;

a reservoir 400, a connecting pipe 410;

the support structure 500, a first bracket 510, a mounting cylinder 511, a supporting block 512, a positioning block 513, a first supporting ring 514, a second bracket 520, and a second supporting ring 521.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

The rotary compressor is a compressor widely applied to refrigeration equipment at present, and a motor of the rotary compressor directly drives a piston to rotate to complete compression of a refrigerant without converting the rotating motion of a rotor into reciprocating motion of the piston. The rotary compressor is more suitable for small-sized refrigeration equipment, and is widely applied to household air conditioners in particular.

In the related art, a motor assembly and a pump assembly of the rotary compressor are directly mounted on the inner wall of a shell, and vibration generated by the motor assembly and the pump assembly is transmitted to the shell, so that the shell vibrates and radiates noise to the outside, and the working noise of the compressor is larger and needs to be improved.

As shown in fig. 1 and 2, an embodiment of the present invention provides a rotary compressor capable of improving vibration of a casing and reducing noise radiated to the outside.

The rotary compressor comprises a shell assembly 100, a motor assembly 200, a pump body assembly 300 and a liquid storage tank 400, wherein the shell assembly 100 is provided with an inner cavity 101, the motor assembly 200 and the pump body assembly 300 are both arranged in the inner cavity 101, the pump body assembly 300 comprises a cylinder 310, a piston 320 and a rotating shaft 330, the cylinder 310 is provided with a compression cavity 311, the piston 320 is fixedly connected to one end of the rotating shaft 330 and is eccentrically arranged in the compression cavity 311, the motor assembly 200 comprises a stator 210 and a rotor 220, the rotor 220 is fixedly connected to the other end of the rotating shaft 330, the stator 210 surrounds the outer side of the rotor 220, and a connecting pipe 410 of the liquid storage tank 400 is communicated with an air suction port of the cylinder 310. When the rotary compressor is operated, the rotor 220 drives the rotating shaft 330 to rotate, and the rotating shaft 330 drives the piston 320 to eccentrically rotate in the compression cavity 311, thereby completing the continuous operations of air suction, compression and exhaust, so that the rotary compressor can output high-pressure refrigerant gas.

It can be understood that, in the operation of the rotary compressor, there are vibrations in both the motor assembly 200 and the pump body assembly 300, and the vibrations are transmitted to the housing assembly 100 and radiate noise to the outside. In order to improve the working noise of the rotary compressor, a supporting structure 500 is arranged in the inner cavity 101 of the housing assembly 100, the motor assembly 200 and the pump body assembly 300 are both mounted on the supporting structure 500, a gap is reserved between the motor assembly 200 and the inner wall of the inner cavity 101, and a gap is also reserved between the pump body assembly 300 and the inner wall of the inner cavity 101. Separating the housing assembly 100 from the motor assembly 200 and the pump body assembly 300 by a gap helps to reduce the transmission of vibrations of the motor assembly 200 and the pump body assembly 300 to the housing assembly 100.

It can be understood that, because the motor assembly 200 does not directly contact the housing assembly 100 with the pump body assembly 300, the vibration of the housing assembly 100 caused by the oscillating frequency of the pump body assembly 300 and the breathing mode frequency of the motor assembly 200 can be improved, thereby reducing the vibration and radiation noise of the housing assembly 100 of the rotary compressor, reducing the working noise of the rotary compressor, being beneficial to improving the user experience of the refrigeration equipment using the rotary compressor, and improving the product competitiveness.

It can be understood that the gap between the motor assembly 200 and the inner wall of the inner cavity 101 is 0.1mm or more than 0.1mm, and the gap of at least 0.1mm makes the motor assembly 200 not touch the inner wall of the inner cavity 101 during operation, so as to achieve the purpose of reducing vibration transmission; the clearance between the pump body assembly 300 and the inner wall of the inner cavity 101 is 0.1mm or more than 0.1mm, and the clearance of at least 0.1mm ensures that the pump body assembly 300 does not touch the inner wall of the inner cavity 101 in the operation process, so that the purpose of reducing vibration transmission is achieved. It should be appreciated that the motor assembly 200 and pump body assembly 300 do not vibrate to an amplitude of 0.1mm during operation, because the precision of the motor assembly 200 and pump body assembly 300 is high and a gap of at least 0.1mm is sufficient to accommodate the vibration amplitude. On the contrary, if the vibration amplitude of the motor assembly 200 and the pump body assembly 300 is greater than 0.1mm, it indicates that the motor assembly 200 and the pump body assembly 300 may have a fault, and may cause a problem of rotation blockage, etc.

Referring to fig. 1 and 2, it can be appreciated that the support structure 500 includes a first bracket 510, the motor assembly 200 is coupled to an upper end of the first bracket 510, and the pump body assembly 300 is coupled to a lower end of the first bracket 510. The motor assembly 200 and the pump body assembly 300 are simultaneously mounted by using the first bracket 510, so that the connection structure between the housing assembly 100 and the motor assembly 200 and between the housing assembly 100 and the pump body assembly 300 is reduced, which is beneficial to reducing vibration transmission, reducing vibration and radiation noise of the housing assembly 100, and reducing working noise of the compressor.

Referring to fig. 1 and 2, it can be understood that the first bracket 510 includes a mounting tube 511, the mounting tube 511 is located at a lower end of the first bracket 510, and the cylinder 310 of the pump block assembly 300 is connected to the mounting tube 511 by a plurality of fasteners (not shown), which are spaced apart from each other in a circumferential direction of the mounting tube 511. Considering that a through hole is required to be formed in the middle of the first bracket 510 for the rotating shaft 330 of the pump block assembly 300 to pass through, an annular mounting tube 511 is provided at the lower end of the first bracket 510, and a plurality of fastening members are circumferentially distributed to fix the cylinder 310, so as to avoid interference with the rotating shaft 330. Moreover, the annular mounting barrel 511 is connected with the air cylinder 310 under more balanced stress, and the structure is reliable.

It can be understood that the fastener can adopt a bolt, a threaded hole is formed in the lower end face of the mounting cylinder 511, through holes corresponding to the threaded holes are formed in the periphery of the air cylinder 310, the bolt penetrates through the through holes and then is screwed into the threaded hole to fix the air cylinder 310, and the air cylinder is simple in structure and convenient to assemble and disassemble. Of course, the fasteners may take other forms, such as rivets, pins, and the like.

A plurality of supporting blocks 512 are disposed at an upper end of the first bracket 510, and the supporting blocks 512 are circumferentially spaced and used for supporting the motor assembly 200. In addition, supporting shoe 512 and stator 210 can carry out fixed connection through the fastener, sets up the screw hole at the up end of supporting shoe 512, and the periphery of stator 210 sets up the through-hole corresponding to the screw hole, and the bolt passes the through-hole and screws into the screw hole again and can fix stator 210, simple structure, easy dismounting. Of course, the fasteners may take other forms, such as rivets, pins, and the like.

The upper end of the first bracket 510 may also be provided with a plurality of positioning blocks 513 distributed at intervals in the circumferential direction, the positioning blocks 513 are used for positioning the motor assembly 200, positioning grooves 211 are formed in the periphery of the stator 210 of the motor assembly 200, and the positioning blocks 513 are clamped into the positioning grooves 211 to limit the position of the motor assembly 200, which is beneficial to improving the coaxiality of the motor assembly 200 and the first bracket 510, and accurately forming a gap between the motor assembly 200 and the inner wall of the inner cavity 101.

Referring to fig. 1 and 5, of course, the upper end of the first bracket 510 may also be provided with a plurality of supporting blocks 512 distributed at intervals in the circumferential direction and a plurality of positioning blocks 513 distributed at intervals in the circumferential direction, the plurality of supporting blocks 512 and the plurality of positioning blocks 513 are arranged in a staggered manner, wherein the supporting blocks 512 are used for supporting the motor assembly 200, the positioning blocks 513 are used for positioning the motor assembly 200, positioning grooves 211 are arranged on the periphery of the stator 210 of the motor assembly 200, and the positioning blocks 513 are clamped into the positioning grooves 211 to limit the position of the motor assembly 200, which is beneficial to improving the coaxiality between the motor assembly 200 and the first bracket 510, and accurately forming a gap between the motor assembly 200 and the inner wall of the inner cavity 101. In addition, the supporting block 512 and the stator 210 can be fixedly connected through a fastener, a threaded hole is formed in the upper end face of the supporting block 512, through holes corresponding to the threaded holes are formed in the periphery of the stator 210, and a bolt penetrates through the through holes and then is screwed into the threaded hole to fix the stator 210.

Referring to fig. 1, it can be understood that the housing assembly 100 includes an upper housing 110, a main housing 120 and a lower housing 130, the upper housing 110 and the lower housing 130 are connected to upper and lower ends of the main housing 120, the main housing 120 includes a first housing section 121 and a second housing section 122, a first support ring 514 is disposed on an outer wall of the first bracket 510, the first housing section 121 is located at a lower side of the first support ring 514, the second housing section 122 is located at an upper side of the first support ring 514, and the first housing section 121 and the second housing section 122 cooperate to clamp the first support ring 514, so as to fix the first bracket 510, the structure is stable, and the first bracket 510 can stably support the motor assembly 200 and the pump body assembly 300. In the axial direction of the main housing 120, the thickness of the first support ring 514 is smaller, which is beneficial to reducing the size of the connection structure of the first support 510 and the main housing 120 and reducing the transmitted vibration.

It can be understood that, in order to satisfy the sealing performance, a first gasket (not shown) is disposed between the first casing section 121 and the first support ring 514, and a second gasket (not shown) is disposed between the second casing section 122 and the first support ring 514, so that the first gasket and the second gasket are used to achieve sealing and leakage prevention, and prevent the refrigerant of the casing assembly 100 from leaking.

It can be understood that the lower casing 130, the first casing section 121 and the second casing section 122 are fixedly connected through a plurality of long bolts, a threaded hole is formed in the lower end surface of the second casing section 122, through holes corresponding to the threaded holes are formed in the lower casing 130 and the first casing section 121, the long bolts penetrate through the through holes of the lower casing 130 and the first casing section 121 and are screwed into the threaded holes of the second casing section 122, and therefore the lower casing 130, the first casing section 121 and the second casing section 122 are fixed into a whole. In addition, first gasket and second gasket all are provided with the through-hole and pass in order to supply the stay bolt, and the periphery of stay bolt is sealed simultaneously to first gasket and second gasket, further improves the leakproofness. The lower shell 130 and the first shell section 121 are sealed by a metal sealing ring, so that the sealing performance is good, and the stability and reliability are high.

Similarly, the upper casing 110 and the second casing section 122 are also fixedly connected by a plurality of long bolts, the upper end surface of the second casing section 122 is provided with a threaded hole, the upper casing 110 is provided with a through hole corresponding to the threaded hole, and the long bolts pass through the through hole of the upper casing 110 and are screwed into the threaded hole of the second casing section 122, so that the upper casing 110 and the second casing section 122 are fixed into a whole. The upper shell 110 and the second shell section 122 are sealed by a metal sealing ring, so that the sealing performance is good, and the stability and reliability are high.

Referring to fig. 1 and 2, it will be appreciated that the interiors of first casing section 121 and second casing section 122 are provided with cavities 102. The cavities 102 are formed in the first shell section 121 and the second shell section 122, so that the transmission of vibration and the retransmission of noise are facilitated to be weakened, the cavities 102 have the effects of vibration reduction and noise reduction, and the working noise of the rotary compressor is further reduced.

It is understood that the cavity 102 may be filled with noise reducing filler 140, and the noise reducing filler 140 may be used to absorb part of the noise, so as to further reduce the noise transmitted through the main housing 120, and the noise reducing filler 140 may be used to reduce the transmission of vibration, so as to reduce the radiation noise of the main housing 120.

It can be understood that the noise reduction filler 140 may be damping particles, and when the operation noise of the motor assembly 200 and the pump body assembly 300 is transmitted to the damping particles, the damping particles can be excited, and the noise is reduced by the mutual collision of the damping particles; when the vibration of the motor assembly 200 and the pump body assembly 300 is transmitted to the damping particles, the damping particles are caused to collide with each other in the cavity 102 or collide with the inner wall of the cavity 102, thereby reducing the transmission of the vibration to the outer wall of the main housing 120 and reducing the outward radiation noise of the main housing 120.

It is understood that the noise reduction filler 140 may also be made of porous soundproof cotton, and when the operation noise of the motor assembly 200 and the pump body assembly 300 is transmitted to the porous soundproof cotton in the cavity 102, the porous soundproof cotton can absorb the noise and reduce the noise transmitted to the outside; when the vibration of the motor assembly 200 and the pump body assembly 300 is transmitted to the soundproof cotton having a plurality of holes in the cavity 102, the soundproof cotton having a plurality of holes is caused to rock in the cavity 102 and collide with an inner wall of the cavity 102, thereby reducing the transmission of the vibration to an outer wall of the main housing 120 and reducing the outward radiation noise of the main housing 120. The porous soundproof cotton in the cavity 102 may be integrated or granular, and can meet the requirements of absorbing noise and reducing vibration transmission.

Of course, the noise reduction filler 140 may be made of other materials, such as metal or non-metal particles.

Referring to fig. 1, it can be understood that the cavity 102 is not filled with the noise reduction filler 140, and a part of the cavity 102 is reserved for the noise reduction filler 140 to move, so as to obtain a better noise reduction effect. The filling rate of the noise reduction filler 140 in the cavity 102 is preferably 80% to 90%, which not only can meet the requirement of the activity of the noise reduction filler 140, but also can fill most of the space of the cavity 102, and the noise reduction effect is obvious.

Referring to fig. 3 and 4, in other embodiments, the support structure 500 includes a first bracket 510 and a second bracket 520, the first bracket 510 being positioned above the pump body assembly 300, the pump body assembly 300 being fixedly attached to a lower end of the first bracket 510; the second bracket 520 is positioned above the motor assembly 200, the motor assembly 200 can be only fixedly connected to the lower end of the second bracket, and the motor assembly 200 and the pump body assembly 300 have less mutual influence; the motor assembly 200 may also be simultaneously and fixedly connected to the first bracket 510 and the second bracket 520, so that the motor assembly 200 can be better fixed and supported, and the structural stability and reliability are improved.

Referring to fig. 4 to 7, it can be understood that the stator 210 of the motor assembly 200 is coupled to the first and

second brackets

510 and 520 by fasteners. The upper end of the first bracket 510 is provided with a plurality of supporting blocks 512 distributed at intervals in the circumferential direction and a plurality of positioning blocks 513 distributed at intervals in the circumferential direction, the plurality of supporting blocks 512 and the plurality of positioning blocks 513 are arranged in a staggered manner, wherein the supporting blocks 512 are used for supporting the motor assembly 200, the positioning blocks 513 are used for positioning the motor assembly 200, positioning grooves 211 are formed in the periphery of the stator 210 of the motor assembly 200, the positioning blocks 513 are clamped into the positioning grooves 211 to limit the position of the motor assembly 200, the coaxiality of the motor assembly 200 and the first bracket 510 is improved, and a gap between the motor assembly 200 and the inner wall of the inner cavity 101 is accurately formed. In addition, supporting shoe 512 and stator 210 can carry out fixed connection through the fastener, sets up the screw hole at the up end of supporting shoe 512, and the periphery of stator 210 sets up the through-hole corresponding to the screw hole, and the bolt passes the through-hole and screws into the screw hole again and can fix stator 210, simple structure, easy dismounting.

The second bracket 520 is also provided with a plurality of supporting blocks 512 distributed at intervals in the circumferential direction and a plurality of positioning blocks 513 distributed at intervals in the circumferential direction, so that the stator 210 is supported and fixed, the motor assembly 200 is fixed from the upper side and the lower side through the first bracket 510 and the second bracket 520, the reduction of the shaking of the motor assembly 200 is facilitated, and the operation stability is improved.

The first bracket 510 and the second bracket 520 may be provided with a plurality of supporting blocks 512 distributed at intervals in the circumferential direction, the motor assembly 200 is supported by the supporting blocks 512, and the supporting blocks 512 and the stator 210 of the motor assembly 200 may be fixedly connected by fasteners.

The first bracket 510 and the second bracket 520 may be provided with a plurality of positioning blocks 513 distributed at intervals in the circumferential direction, the positioning groove 211 is formed in the periphery of the stator 210 of the motor assembly 200, and the positioning blocks 513 are clamped into the positioning groove 211 to limit the position of the motor assembly 200, which is beneficial to improving the coaxiality of the motor assembly 200 and the first bracket 510, and accurately forming a gap between the motor assembly 200 and the inner wall of the inner cavity 101.

Referring to fig. 3 and 4, main housing 120 is divided into three parts, including first housing section 121, second housing section 122 and third housing section 123, a first support ring 514 is disposed on an outer wall of first support 510, first housing section 121 is located on a lower side of first support ring 514, second housing section 122 is located on an upper side of first support ring 514, and first housing section 121 and second housing section 122 cooperate to clamp first support ring 514, so as to fix first support 510, and the structure is stable; the outer wall of the second bracket 520 is provided with a second support ring 521, the second casing section 122 is positioned at the lower side of the second support ring 521, the third casing section 123 is positioned at the upper side of the second support ring 521, and the second casing section 122 and the third casing section 123 are matched to clamp the second support ring 521, so that the second bracket 520 is fixed, and the structure is stable.

In the axial direction of the main housing 120, the thickness of the first support ring 514 and the second support ring 521 is smaller, which is beneficial to reducing the size of the connecting structure of the first support frame 510 and the second support frame 520 with the main housing 120 and reducing the transmitted vibration.

It can be understood that cavities 102 are disposed inside first shell section 121, second shell section 122 and third shell section 123, and noise reduction fillers 140 are filled in cavities 102, and noise reduction fillers 140 are used to absorb part of noise, so as to further reduce noise transmitted to the outside through main shell 120, and meanwhile, noise reduction fillers 140 are used to reduce transmission of vibration, so as to reduce radiation noise of main shell 120.

The noise reduction filler 140 may be damping particles, and when the operation noise of the motor assembly 200 and the pump body assembly 300 is transmitted to the damping particles, the damping particles can be excited, and the noise is reduced by mutual collision of the damping particles; when the vibration of the motor assembly 200 and the pump body assembly 300 is transmitted to the damping particles, the damping particles are caused to collide with each other in the cavity 102 or collide with the inner wall of the cavity 102, thereby reducing the transmission of the vibration to the outer wall of the main housing 120 and reducing the outward radiation noise of the main housing 120. The main housing 120 adopts a three-section structure, which is convenient for loading damping particles, and is also convenient for installing the first bracket 510, the second bracket 520, the motor assembly 200 and the pump body assembly 300, thereby simplifying the assembly process and improving the efficiency; the damping particles are filled in the cavities 102 of the main housing 120, and the damping particles in the cavities 102 have more moving spaces, which is beneficial to noise reduction.

The noise reduction filler 140 may also be made of porous soundproof cotton, and when the operation noise of the motor assembly 200 and the pump body assembly 300 is transmitted to the porous soundproof cotton in the cavity 102, the porous soundproof cotton can absorb the noise and reduce the noise transmitted to the outside; when the vibration of the motor assembly 200 and the pump body assembly 300 is transmitted to the soundproof cotton having a plurality of holes in the cavity 102, the soundproof cotton having a plurality of holes is caused to rock in the cavity 102 and collide with an inner wall of the cavity 102, thereby reducing the transmission of the vibration to an outer wall of the main housing 120 and reducing the outward radiation noise of the main housing 120. The porous soundproof cotton in the cavity 102 may be integrated or granular, and can meet the requirements of absorbing noise and reducing vibration transmission.

It can be understood that the cavity 102 is not filled with the noise reduction filler 140, and the cavity 102 is reserved with a part of space for the noise reduction filler 140 to move, so as to obtain a better noise reduction effect. The filling rate of the noise reduction filler 140 in the cavity 102 is preferably 80% to 90%, which not only can meet the requirement of the activity of the noise reduction filler 140, but also can fill most of the space of the cavity 102, and the noise reduction effect is obvious.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A rotary compressor, comprising:

a housing assembly having an internal cavity, the housing assembly being provided with a support structure located in the internal cavity;

a motor assembly located in the interior cavity and connected to the support structure, the motor assembly having a gap with an interior wall of the interior cavity;

a pump body assembly located in the internal cavity and connected to the support structure, the pump body assembly having a gap with an inner wall of the internal cavity.

2. The rotary compressor of claim 1, wherein a gap between the motor assembly and the inner wall of the inner cavity is equal to or greater than 0.1mm, and a gap between the pump body assembly and the inner wall of the inner cavity is equal to or greater than 0.1mm.

3. The rotary compressor of claim 1, wherein the support structure comprises a first bracket, the motor assembly is connected to an upper end of the first bracket, and the pump body assembly is connected to a lower end of the first bracket.

4. The rotary compressor of claim 3, wherein the first bracket is provided with a plurality of circumferentially arranged support blocks abutting the motor assembly to support the motor assembly; or the first support is provided with a plurality of positioning blocks which are circumferentially arranged, and the motor component is provided with a positioning groove matched with the positioning blocks.

5. The rotary compressor of claim 3, wherein the support structure further comprises a second bracket located above the motor assembly, the motor assembly being connected to a lower end of the second bracket.

6. The rotary compressor of claim 5, wherein the motor assembly comprises a stator, and the stator is connected to the first bracket and the second bracket by a fastening member.

7. The rotary compressor of claim 6, wherein the first bracket and the second bracket are each provided with a plurality of circumferentially arranged support blocks abutting the motor assembly to support the motor assembly; or the first support and the second support are provided with a plurality of positioning blocks which are circumferentially arranged, and the motor assembly is provided with positioning grooves matched with the positioning blocks.

8. The rotary compressor of claim 3, wherein the first bracket comprises a mounting cylinder, and the pump body assembly is connected to the mounting cylinder by a plurality of fasteners, the plurality of fasteners being spaced apart along a circumference of the mounting cylinder.

9. The rotary compressor of claim 3, wherein the casing assembly comprises an upper casing, a main casing and a lower casing, the main casing comprises a first casing section and a second casing section, a first support ring is disposed on an outer wall of the first support, and the first casing section and the second casing section are respectively connected to two axial ends of the first support ring.

10. The rotary compressor of claim 9, wherein a first gasket is disposed between the first casing section and the first support ring, and a second gasket is disposed between the second casing section and the first support ring.

11. The rotary compressor of claim 9, wherein the first and second casing sections are internally provided with a cavity.

12. The rotary compressor of claim 11, wherein the cavity is filled with a noise reduction filler.

13. The rotary compressor of claim 12, wherein the noise reducing filler is damping particles or porous soundproof cotton.

14. The rotary compressor of claim 13, wherein a filling rate of the noise reduction filler in the cavity is 80% to 90%.

15. The rotary compressor of any one of claims 9 to 14, wherein the main housing further comprises a third casing section, the support structure further comprises a second bracket, the motor assembly is connected to a lower end of the second bracket, an outer wall of the second bracket is provided with a second support ring, and the second casing section and the third casing section are respectively connected to two axial ends of the second support ring.