CN219101588U

CN219101588U - Compressor and air conditioning system

Info

Publication number: CN219101588U
Application number: CN202223264988.1U
Authority: CN
Inventors: 李鹏; 汤奇雄; 黎辉玲; 邱小洲; 冯君璞
Original assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-05-30
Anticipated expiration: 2032-12-02

Abstract

The utility model discloses a compressor and an air conditioning system. In the heating mode, the first exhaust port and the second exhaust port are communicated with the indoor heat exchanger for heating. In the defrosting mode, the first exhaust port is communicated with the indoor heat exchanger, and heating is continued; and the second exhaust port is communicated with the outdoor heat exchanger to defrost the outdoor heat exchanger. The indoor heat exchanger can still maintain hot air output while defrosting, so that the temperature in the defrosting and heating chamber is greatly improved, and the pain point is greatly reduced. The problem of the air conditioning system defrosting shut down bring big temperature fluctuation is solved, human perception travelling comfort has been improved. Meanwhile, the four-way valve is not required to be switched by stopping when the air conditioning system heats and defrost, so that the problem of low heating energy efficiency ratio of the air conditioner is avoided.

Description

Compressor and air conditioning system

Technical Field

The utility model relates to the technical field of air conditioning systems, in particular to a compressor and an air conditioning system.

Background

The existing household air conditioning system heating application comprises the following steps of reducing the outdoor environment temperature, reducing the evaporation temperature, increasing the air suction specific volume, reducing the capacity of unit volume, reducing the heating quantity, gradually frosting an evaporator when the system is used for heating below the evaporation temperature of 0 ℃, and periodically defrosting by switching a refrigeration mode through a four-way valve along with the increase of the frosting quantity, wherein an indoor fan stops running in the defrosting process, stops hot air output, and an outdoor heat exchanger is defrosted, and the higher the outdoor environment humidity is, the more frequent defrosting is likely to cause the indoor temperature to be greatly reduced, and the human body perception comfort is poor. In addition, the existing air conditioner heat defrosting needs to be stopped to switch the four-way valve, so that the low-temperature heating energy efficiency ratio of the air conditioner is not high.

Disclosure of Invention

The utility model mainly aims to provide a compressor, which aims to solve the problem of large temperature fluctuation caused by defrosting and stopping of an air conditioning system.

The technical scheme of the utility model provides a compressor, which comprises the following steps:

a housing having an interior cavity including a first receiving cavity and a second receiving cavity;

the motor comprises a motor main body and a crankshaft, and the motor main body is arranged in the first accommodating cavity;

The pump body assembly is arranged in the second accommodating cavity and is connected with the motor main body through the crankshaft, and the pump body assembly is communicated with the first accommodating cavity and the second accommodating cavity;

the first exhaust port is arranged on the shell and is communicated with the first accommodating cavity;

and the second exhaust port is arranged on the shell and is communicated with the second accommodating cavity.

In one embodiment, the pump body assembly includes a first cylinder in communication with the first receiving cavity and a second cylinder in communication with the second receiving cavity.

In an embodiment, the compressor further comprises a first bearing and a second bearing, a side wall of the first bearing being connected to an inner wall of the housing to divide the inner cavity into the first accommodation chamber and the second accommodation chamber; the second bearing is arranged in the second accommodating cavity, and the pump body assembly is arranged between the first bearing and the second bearing.

In an embodiment, the compressor further comprises an inner cover, the inner cover is arranged in the second accommodating cavity and is connected with the inner wall of the shell, the inner cover is arranged outside the pump body assembly and the second bearing, a separation cavity is formed between the inner cover and the shell, and the separation cavity is communicated with the second exhaust port and the second cylinder.

In an embodiment, the compressor further includes a first silencing cover and a second silencing cover, the first silencing cover is disposed in the first accommodating cavity and sleeved with the first bearing to form a first resonance chamber, the first resonance chamber is communicated with the first cylinder, the first silencing cover is provided with a communication hole, and the first resonance chamber is communicated with the first accommodating cavity through the communication hole;

the second silencing cover is arranged on the inner cover and sleeved with the second bearing to form a second resonance chamber, and the second resonance chamber is communicated with the second cylinder and the separation cavity.

In one embodiment, the inner cover is provided with a separating opening; the compressor further comprises a separation pipe, and the separation pipe is communicated with the second cylinder and the separation cavity through the separation port.

In an embodiment, the free end of the separating tube is used for guiding the refrigerant to the inner wall of the separating chamber, and the opening direction of the port of the free end forms an included angle with the radial direction of the shell passing through the separating opening.

In an embodiment, the included angle is not greater than 120 ° and not less than 45 °.

In an embodiment, the inner cover is provided with a first oil return hole, and the first oil return hole is arranged at the bottom of the inner cover and is communicated with the separation cavity.

In an embodiment, the compressor further comprises an oil baffle ring, the oil baffle ring is arranged in the separation cavity, an inner ring of the oil baffle ring is connected with the inner cover, a space is reserved between an outer ring of the oil baffle ring and the shell, and the oil baffle ring is provided with a through hole.

In one embodiment, the compressor further comprises a seal disposed between and abutting the inner shroud and the shell.

In one embodiment, the compressor further comprises a silencing piece, and the silencing piece is arranged on the inner wall of the first accommodating cavity; and/or the silencing piece is arranged on the outer wall of the inner cover.

In an embodiment, the motor body includes a stator, the stator is disposed in the first accommodating cavity, and the stator is connected with the housing through a bolt.

The present utility model also provides an air conditioning system including a compressor including:

In an embodiment, the air conditioning system further comprises:

an outdoor heat exchanger and an indoor heat exchanger;

the four-way valve is provided with a first port, a second port, a third port and a fourth port, the first port is connected with the first exhaust port, the second port is connected with the outdoor heat exchanger, the third port is connected with the air suction port of the compressor, and the fourth port is connected with the indoor heat exchanger;

the three-way valve is provided with a first valve port, a second valve port and a third valve port, the first valve port is connected with the second exhaust port, the second valve port is connected with the first through port, and the third valve port is connected with the outdoor heat exchanger;

the throttle valve is arranged between the outdoor heat exchanger and the indoor heat exchanger and is connected with the outdoor heat exchanger and the indoor heat exchanger.

In an embodiment, the air conditioning system further comprises a gas-liquid separator, wherein the gas-liquid separator is arranged between the throttle valve and the outdoor heat exchanger, the gas-liquid separator is connected with the outdoor heat exchanger through a first connecting pipe, is connected with the throttle valve through a second connecting pipe, and is communicated with the third valve port through a third connecting pipe.

In one embodiment, the first connecting pipe is provided with a second oil return hole.

The technical scheme of the utility model provides a compressor, wherein a shell of the compressor is provided with a first accommodating cavity and a second accommodating cavity, a first exhaust port and a second exhaust port are arranged on the shell, the first exhaust port is communicated with the first accommodating cavity, and the second exhaust port is communicated with the second accommodating cavity. In the heating mode, the first exhaust port and the second exhaust port are communicated with the indoor heat exchanger for heating. In the defrosting mode, the first exhaust port is communicated with the indoor heat exchanger, and heating is continued; and the second exhaust port is communicated with the outdoor heat exchanger to defrost the outdoor heat exchanger. The indoor heat exchanger can still maintain hot air output while defrosting, so that the temperature in the defrosting and heating chamber is greatly improved, and the pain point is greatly reduced. The problem of the air conditioning system defrosting shut down bring big temperature fluctuation is solved, human perception travelling comfort has been improved. Meanwhile, the four-way valve is not required to be switched by stopping when the air conditioning system heats and defrost, so that the problem of low heating energy efficiency ratio of the air conditioner is avoided.

In addition, the built-in oil separator of the compressor provided by the technical scheme of the utility model enables the refrigerant to be separated from oil drops, and solves the problem of high oil discharge rate of the compressor under high-frequency operation. Specifically, the separating tube passes through the inner cover from the separating opening, one end of the separating tube is connected with the pump body assembly, and the free end of the separating tube is communicated with the separating cavity so as to guide the refrigerant into the separating cavity. The refrigerant containing oil droplets, which is guided into the separation cavity, forms a speed difference with the oil droplets along the inner wall surface of the shell under the action of centrifugal force, and the oil droplets flow to the bottom of the shell along the inner wall of the shell and then enter the pump body assembly to supplement the oil surface. The amount of the refrigerating machine oil entering the system heat exchanger along with the refrigerant is greatly reduced, and the problem of high oil discharge rate caused by high-frequency application of the compressor is solved. Therefore, the reliability of the compressor is improved, and the heat exchange efficiency of the system heat exchanger is synchronously improved.

Meanwhile, the high-temperature refrigerant surrounds the pump body assembly, so that the oil temperature superheat degree of the compressor is improved, and the problems of unqualified oil surface and liquid impact of the compressor caused by starting liquid carrying and wet compression of the compressor are solved, thereby improving the low-temperature application reliability of the compressor.

The pump body assembly is provided with the inner cover, the gaseous refrigerant is filled between the inner cover and the shell, and the pump body assembly is provided with a solid, gas and solid structure, so that radiation noise can be greatly reduced. In addition, the resistance silencer is arranged outside the pump body assembly, so that the noise value of the sensitive frequency band of the human ear can be reduced, and the effect of low noise is achieved. The air flow path in the compressor is also provided with the silencing piece, the silencing piece can reduce the influence of high-frequency noise, and the high, medium and low full-frequency noise can be greatly reduced by combining the use of the resistance silencer.

The stator and the shell of the motor are fixed by bolts, so that the iron loss of the motor is reduced, the motor efficiency is improved, and the problems of reliability and low-frequency energy efficiency of the miniaturized high-speed high-load application motor are solved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a compressor;

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

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a schematic diagram of an air conditioning system;

fig. 5 is a schematic diagram of the structure of the gas-liquid separator.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				10	Compressor	110	First accommodation chamber
100	Shell body	120	Second accommodation chamber
				200	Motor with a motor housing	130	First exhaust port
300	Pump body assembly	140	Second exhaust port
				410	Inner cover	210	Motor main body
420	Separating tube	211	Stator
				430	Separation chamber	220	Crankshaft
510	First bearing	310	First air cylinder
				520	Second bearing	320	Second cylinder
610	First silencing cover	411	Separating opening
				620	Second silencing cover	412	First oil return hole
611	First resonance chamber	413	Oil baffle ring
				612	Communication hole	700	Silencing piece
621	Second resonance chamber	800	Sealing element
				20	Three-way valve	21	First valve port
30	Four-way valve	22	Second valve port
				40	Gas-liquid separator	23	Third valve opening
50	Outdoor heat exchanger	31	A first through hole
				60	Indoor heat exchanger	32	Second port
70	Throttle valve	33	Third port
				80a	First connecting pipe	34	Fourth port
80b	Second connecting pipe	41	Separating partition board
				80c	Third connecting pipe	42	Liquid storage cavity
81	Second oil return hole

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the case where a directional instruction is involved in the embodiment of the present utility model, the directional instruction is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional instruction is changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" is presented throughout this document, it is intended to include three schemes in parallel, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1, the present utility model proposes a compressor 10, which includes a housing 100, a motor 200, a pump body assembly 300, a first exhaust port 130 and a second exhaust port 140, wherein the housing 100 has an inner cavity, and the inner cavity includes a first accommodating cavity 110 and a second accommodating cavity 120; the motor 200 includes a motor body 210 and a crankshaft 220, the motor body 210 being disposed in the first receiving chamber 110; the pump body assembly 300 is arranged in the second accommodating cavity 120 and is connected with the motor main body 210 through the crankshaft 220, and the pump body assembly 300 is communicated with the first accommodating cavity 110 and the second accommodating cavity 120; the first exhaust port 130 is provided in the housing 100 and communicates with the first accommodating chamber 110; the second exhaust port 140 is provided in the housing 100 and communicates with the second accommodating chamber 120.

Specifically, the housing 100 is substantially cylindrical, and the housing 100 includes an upper cover, a lower cover, and a sidewall, a top end of which is connected to the upper cover, and a bottom end of which is connected to the lower cover. The housing 100 is internally formed with an inner cavity including a first receiving cavity 110 and a second receiving cavity 120, the motor main body 210 is disposed in the first receiving cavity 110, the pump body assembly 300 is disposed in the second receiving cavity 120, and the motor main body 210 and the pump body assembly 300 are connected through the crankshaft 220. The crankshaft 220 has a long shaft portion, an eccentric portion, and a short shaft portion, and the crankshaft 220 transmits a rotational force of the motor body 210 to the rotary piston in the pump body assembly 300 and rotates the rotary piston to compress the refrigerant. Generally, the stator 211 of the motor main body 210 is fixed on the inner wall of the housing 100, the rotor of the motor main body 210 is sleeved on the crankshaft 220, and the rotor is tightly held by a hot sleeve manner and drives the crankshaft 220, but not limited thereto. The rotor rotates with respect to the stator 211 so as to transmit a rotational force of the motor body 210 to the rotary piston of the pump body assembly 300 to compress the refrigerant.

The housing 100 has an inner cavity including a first accommodating chamber 110 and a second accommodating chamber 120, a first exhaust port 130 and a second exhaust port 140 are provided on the housing 100, the first exhaust port 130 communicates with the first accommodating chamber 110, and the second exhaust port 140 communicates with the second accommodating chamber 120. The compressor 10 further includes a reservoir that communicates with the suction port of the pump body assembly 300 through a suction pipe. The accumulator is used for separating the refrigerant gas and liquid and introducing the separated gaseous refrigerant into the pump body assembly 300. Before the refrigerant enters the pump body assembly 300, the refrigerant is subjected to gas-liquid separation in the liquid reservoir to remove liquid drops carried in the gaseous refrigerant, so that the liquid drops are prevented from interfering with the operation of the pump body assembly 300. The gas-liquid separated gaseous refrigerant enters the pump body assembly 300 through the suction pipe to be compressed. The pump body assembly 300 is disposed in the second accommodating chamber 120, and the high-temperature and high-pressure gaseous refrigerant compressed by the pump body assembly 300 enters the first accommodating chamber 110 and the second accommodating chamber 120. The refrigerant of the first receiving chamber 110 is discharged from the first discharge port 130, and the refrigerant of the second receiving chamber 120 is discharged from the second discharge port 140.

In the refrigeration mode, the first exhaust port 130 and the second exhaust port 140 are communicated with the outdoor heat exchanger 50, the refrigerant enters the indoor heat exchanger 60 through the pipe to perform refrigeration and then returns to the liquid reservoir, and the refrigerant enters the pump body assembly 300 to perform compression after gas-liquid separation in the liquid reservoir and is then discharged through the first exhaust port 130 and the second exhaust port 140, so that the refrigeration cycle is completed. The cooling mode is not different from the normal cooling mode.

In the heating mode, the first exhaust port 130 and the second exhaust port 140 are communicated with the indoor heat exchanger 60, after heating, the refrigerant enters the outdoor heat exchanger 50 through the pipeline and returns to the liquid reservoir, and after gas-liquid separation in the liquid reservoir, the refrigerant enters the pump body assembly 300 for compression, and is discharged through the first exhaust port 130 and the second exhaust port 140, so that the heating cycle is completed. The heating mode is not different from the conventional heating mode.

In the defrosting mode, the first air outlet 130 is communicated with the indoor heat exchanger 60, after heating, the refrigerant enters the outdoor heat exchanger 50 through the pipeline and returns to the liquid reservoir, and after gas-liquid separation in the liquid reservoir, the refrigerant enters the pump body assembly 300 for compression and is discharged through the first air outlet 130. The first exhaust port 130 communicates with the indoor heat exchanger 60, and the indoor heat exchanger 60 always maintains heating so that the indoor temperature does not drop greatly. And the second exhaust port 140 communicates with the outdoor heat exchanger 50 to defrost the outdoor heat exchanger 50. The indoor heat exchanger 60 is still heating while the outdoor heat exchanger 50 is defrosting, thereby realizing the defrosting function while heating. The problem of the air conditioning system defrosting shut down bring big temperature fluctuation is solved, human perception travelling comfort has been improved.

The compressor according to the present utility model has a housing 100 having a first accommodating chamber 110 and a second accommodating chamber 120, a first exhaust port 130 and a second exhaust port 140 are provided on the housing 100, the first exhaust port 130 is communicated with the first accommodating chamber 110, and the second exhaust port 140 is communicated with the second accommodating chamber 120. In the heating mode, the first exhaust port 130 and the second exhaust port 140 are both in communication with the indoor heat exchanger 60 to perform heating. In the defrosting mode, the first exhaust port 130 communicates with the indoor heat exchanger 60 to continue heating; and the second exhaust port 140 communicates with the outdoor heat exchanger 50 to defrost the outdoor heat exchanger 50. While defrosting the outdoor heat exchanger 50, the indoor heat exchanger 60 is still heating, while defrosting the outdoor heat exchanger, the indoor heat exchanger can still maintain hot air output, thereby greatly improving the temperature greatly reducing pain point in the defrosting heating chamber. The problem of the air conditioning system defrosting shut down bring big temperature fluctuation is solved, human perception travelling comfort has been improved. Meanwhile, the four-way valve 30 is not required to be stopped and switched when the air conditioning system heats and defrost, so that the problem of low temperature heating energy efficiency ratio of the air conditioner is avoided.

In one embodiment, the pump body assembly 300 includes a first cylinder 310 and a second cylinder 320, the first cylinder 310 being in communication with the first receiving chamber 110, the second cylinder 320 being in communication with the second receiving chamber 120.

Referring to fig. 1 and 2, the pump body assembly 300 includes a first cylinder 310 and a second cylinder 320, the first cylinder 310 has a first air suction port thereon, and the liquid reservoir is communicated with the first air suction port of the first cylinder 310 through a first air suction pipe; the second cylinder 320 has a second suction port thereon, and the reservoir communicates with the second suction port of the second cylinder 320 through a second suction pipe. The refrigerant enters the first cylinder 310, is compressed, enters the first receiving chamber 110, and is discharged from the first discharge port 130. The refrigerant enters the second cylinder 320, is compressed, enters the second receiving chamber 120, and is discharged from the second discharge port 140. The exhaust processes of the first cylinder 310 and the second cylinder 320 are not affected each other, ensuring that the first cylinder 310 and the second cylinder 320 can realize mutually independent exhaust functions, and realizing double-pressure exhaust of the compressor 10. During defrosting mode, the first cylinder 310 compresses and heats, the second cylinder 320 serves as a quasi-air pump application principle, absorbs the exhaust heat of the first cylinder 310, supplements two-phase state heat of the refrigerant, and defrostes the outdoor heat exchanger 50, so that the defrosting function while heating is realized, the temperature in the defrosting heating chamber is greatly reduced, and the human body perception comfort is improved.

In one embodiment, the compressor 10 further includes a first bearing 510 and a second bearing 520, the sidewall of the first bearing 510 being connected with the inner wall of the housing 100 to divide the inner cavity into a first receiving chamber 110 and a second receiving chamber 120; the second bearing 520 is provided in the second receiving chamber 120, and the pump body assembly 300 is provided between the first bearing 510 and the second bearing 520.

Referring to fig. 1 and 2, an outer wall of an outer ring of the first bearing 510 is connected with an inner wall of the housing 100, and the first bearing 510 is fixed with the housing 100 and divides an inner cavity into a first accommodating cavity 110 and a second accommodating cavity 120. The pump body assembly 300 and the second bearing 520 are disposed within the second receiving chamber 120. The pump body assembly 300 is disposed between the first bearing 510 and the second bearing 520, and connects the first bearing 510 and the second bearing 520. One end of the crankshaft 220 is connected to the motor body 210, and the other end is sequentially connected to the first bearing 510, the pump body assembly 300, and the second bearing 520. The first bearing 510 and the second bearing 520 serve as supports for the crankshaft 220, while the crankshaft 220 provides a rotational force to the pump body assembly 300 to compress the refrigerant.

Specifically, the first bearing 510 and the second bearing 520 are spaced apart, and the first cylinder 310 and the second cylinder 320 are located between the first bearing 510 and the second bearing 520. A partition is further provided between the first cylinder 310 and the second cylinder 320. Wherein the first bearing 510 can provide support to the first cylinder 310, and the second bearing 520 can provide support to the second cylinder 320, improving the mounting stability of the first cylinder 310 and the second cylinder 320. The baffle is disposed between the first cylinder 310 and the second cylinder 320, the first cylinder 310 and the second cylinder 320 are further disposed between the first bearing 510 and the second bearing 520, so that the first cylinder 310 between the first bearing 510 and the baffle is blocked, and the second cylinder 320 between the second bearing 520 and the baffle is blocked. The first bearing 510 is further provided with a first discharge valve plate, the first discharge valve plate is connected with the first cylinder 310, and the refrigerant is discharged into the first accommodating cavity 110 from the first valve plate after being compressed in the first cylinder 310; the second bearing 520 is further provided with a second discharge valve plate connected to the second cylinder 320, and the refrigerant is discharged into the second receiving chamber 120 from the second valve plate after being compressed in the second cylinder 320.

In an embodiment, the compressor 10 further includes an inner cover 410, the inner cover 410 is disposed in the second accommodating chamber 120 and is connected to the inner wall of the housing 100, the inner cover 410 is covered outside the pump body assembly 300 and the second bearing 520, a separation chamber 430 is formed between the inner cover 410 and the housing 100, and the separation chamber 430 communicates with the second exhaust port 140 and the second cylinder 320.

Referring to fig. 1 and 2, the inner cover 410 is generally cup-shaped, and the inner cover 410 includes a sidewall and a lower cover, with the bottom end of the sidewall being connected to the lower cover. The inner cover 410 is disposed in the second receiving chamber 120 and covers the pump body assembly 300 and the second bearing 520. A space is provided between the lower cover of the inner cover 410 and the lower cover of the housing 100, a space is also provided between the sidewall of the inner cover 410 and the sidewall of the housing 100, and one end of the sidewall, which is close to the motor 200, is connected to the inner wall of the housing 100, so that a separation chamber 430 is formed between the inner cover 410 and the housing 100. The separation chamber 430 communicates with the second exhaust port 140 and the second cylinder 320, and the refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant in the second cylinder 320 and then enters the separation chamber 430. The gaseous refrigerant containing oil droplets is oil-separated in the separation chamber 430, the oil droplets are collected at the bottom of the housing 100 along the inner wall of the housing 100, and the gaseous refrigerant from which the oil droplets are removed is discharged from the second exhaust port 140.

In an embodiment, the compressor 10 further includes a first silencing cover 610 and a second silencing cover 620, the first silencing cover 610 is disposed in the first accommodating cavity 110 and sleeved with the first bearing 510 to form a first resonance chamber 611, the first resonance chamber 611 is communicated with the first cylinder 310, the first silencing cover 610 is provided with a communication hole 612, and the first resonance chamber 611 is communicated with the first accommodating cavity 110 through the communication hole 612;

the second silencing cover 620 is provided to the inner cover 410 and is sleeved with the second bearing 520 to form a second resonance chamber 621, and the second resonance chamber 621 communicates with the second cylinder 320 and the separation chamber 430.

Referring to fig. 2, the gaseous refrigerant continuously flows and is compressed from the time of entering the pump body assembly 300 to the time of exiting the pump body assembly 300, so that there is airflow noise. In order to reduce the noise of the air flow, the compressor 10 is further provided with a first silencing cover 610 and a second silencing cover 620. A first resonance chamber 611 is formed between the first silencing cover 610 and the first bearing 510, and a second resonance chamber 621 is formed between the second silencing cover 620 and the second bearing 520. The first resonance chamber 611 communicates with the first cylinder 310 and communicates with the first receiving chamber 110 through a communication hole 612 on the first muffler cover 610. The refrigerant in the first cylinder 310 enters the first resonance chamber 611 and then enters the first accommodation chamber 110 from the communication hole 612. The second resonance chamber 621 communicates with the separation chamber 430 through the separation pipe 420, and the refrigerant in the second cylinder 320 enters the second resonance chamber 621 and then enters the separation chamber 430 through the separation pipe 420. The application of the first silencing cover 610 and the first resonating chamber 611, the second silencing cover 620 and the second resonating chamber 621 can greatly reduce the noise value of the human ear sensitive frequency band, thereby realizing the effect of low noise.

In one embodiment, the inner cover 410 is provided with a separating opening 411; the compressor 10 further includes a separation pipe 420, and the separation pipe 420 communicates with the second cylinder 320 and the separation chamber 430 through the separation port 411.

Referring to fig. 2, the inner cover 410 is provided with a separation port 411, and the separation tube 420 passes through the separation port 411, one end of the separation tube is communicated with the pump body assembly 300, and the other end is a free end, and the free end is disposed in the separation chamber 430 for guiding the compressed refrigerant in the second cylinder 320 to the inner wall of the housing 100. After leaving the port of the free end of the separation tube 420, the refrigerant containing the oil droplets introduced into the separation chamber 430 forms a velocity difference with the oil droplets along the inner wall surface of the casing 100 under the centrifugal force, and the oil droplets flow to the bottom of the casing 100 along the inner wall of the casing 100 and then enter the pump body assembly 300 to supplement the oil surface. The gaseous refrigerant is discharged from the second exhaust port 140, so that the separation effect of the gaseous refrigerant and the refrigerating machine oil is realized, the amount of the refrigerating machine oil entering the system heat exchanger along with the refrigerant is greatly reduced, the problem of high oil discharge rate caused by high-frequency application of the compressor 10 is solved, the reliability of the compressor 10 is improved, and the heat exchange efficiency of the system heat exchanger is synchronously improved.

It will be appreciated that when the air conditioning system having the small-sized high-speed compressor 10 is applied in an ultra-low temperature environment, the air conditioning system is allowed to stand in the low temperature environment before being started, and the refrigerant in the system migrates to the compressor 10 and is mutually dissolved with the refrigerating machine oil to reside in the bottom of the inner cover 410. At lower ambient temperatures, some of the refrigerant will settle in liquid form at the bottom of inner shroud 410 and delaminate from the refrigerator oil (liquid refrigerant is located in the lower layer of the oil). In the initial stage of start-up, the liquid refrigerant at the bottom of the inner housing 410 evaporates, so that a large amount of oil is discharged from the pump body assembly 300, and the oil, which is also deposited at the bottom of the inner housing 410, is guided out of the separation tube 420 after being mixed with the gaseous refrigerant. The forced operation control program is combined with the double-speed start to enable the compressor 10 to start application at a low temperature and double-speed, the refrigerant containing oil drops, which is led into the separation cavity 430, forms a speed difference with the oil drops along the inner wall surface of the shell 100 under the action of centrifugal force, so that the separation of the gaseous refrigerant and the refrigerating machine oil is realized, the quantity of the refrigerating machine oil entering the system heat exchanger along with the refrigerant is greatly reduced, the problem of high oil discharge rate caused by the high-frequency application of the compressor 10 is solved, the reliability of the compressor 10 is improved, and the heat exchange efficiency of the system heat exchanger is synchronously improved.

The refrigerant compressed by the pump body assembly 300 is a high-temperature and high-pressure gaseous refrigerant, and after the gaseous refrigerant is introduced into the separation chamber 430 from the separation tube 420, the separation chamber 430 is filled with a high-temperature air flow. The high temperature air flow surrounds the inner housing 410, and can heat the inner housing 410 and the pump body assembly 300 arranged in the inner housing 410. Because the high temperature air flows around the inner cover 410, the evaporation of the liquid refrigerant can be quickened, thereby reducing the condition that the low temperature belt liquid starting oil surface is unqualified and greatly improving the hydraulic compression risk. On the other hand, since the high temperature air flows around the inner cover 410, when the pump body assembly 300 is operated, the actual oil temperature is the exhaust gas separated oil temperature, the superheat degree of the oil temperature is increased, the mixed oil content of the engine oil and the refrigerant at the bottom of the inner cover 410 is high, and the operation reliability of the compressor 10 is greatly improved. In addition, the pump body assembly 300 is externally provided with the inner cover 410, gaseous refrigerant is filled between the inner cover 410 and the shell 100, and the pump body assembly 300 is externally provided with a solid+gaseous+solid structure, so that radiation noise can be greatly reduced.

In one embodiment, the free end of the separation tube 420 is used to direct the refrigerant to the inner wall of the separation chamber 430, and the opening direction of the port of the free end forms an angle with the radial direction of the housing 100 through the separation port 411.

Referring to fig. 2 and 3, an included angle is formed between the opening direction of the port at the free end of the separating tube 420 and the radial direction of the housing 100 passing through the separating opening 411, and the included angle is θ. The oil-containing refrigerant introduced into the separation chamber 430 has a radius of rotation such that centrifugal force applied to the refrigerant increases. The opening direction of the port of the free end of the separation tube 420 forms an angle with the radial direction of the housing 100 passing through the separation port 411, and may be such that the separation tube 420 is bent such that the separation tube 420 has two separation tubes 420 having different extension directions. The bend of the separation tube 420 may be located within the separation chamber 430 or within the separation chamber 430. When the bend of the separation tube 420 is located in the separation chamber 430, the extension direction of one section of the separation tube 420 communicating with the pump body assembly 300 coincides with the radial direction of the housing 100 passing through the separation port 411, and forms an angle with the other section of the separation tube 420 having a free end at the bend, the angle coincides with the magnitude of θ. When the bend of the separation tube 420 is located in the inner cover 410, the extending direction of the separation tube 420 in the section communicating with the pump body assembly 300 may be consistent with the radial direction of the housing 100 passing through the separation port 411, and the included angle formed by the separation tube 420 and the separation tube 420 with the free end in the bend is consistent with the θ; the extending direction of a segment of the separation tube 420 communicating with the pump body assembly 300 may also be different from the radial direction of the housing 100 passing through the separation port 411, and the angle formed by the segment of the separation tube 420 and another segment of the separation tube 420 having a free end at the bend is different from the angle θ.

In an embodiment, one end of the separation tube 420 is connected to the pump body assembly 300 and passes through the separation port 411, the free end of the separation tube 420 is used for guiding the refrigerant to the inner wall of the housing 100, and the opening direction of the port of the free end forms an included angle with the radial direction of the housing 100 passing through the separation port 411, and the included angle is not greater than 120 ° and not less than 45 °.

Referring to fig. 2, an included angle is formed between the opening direction of the port at the free end of the separating tube 420 and the radial direction of the housing 100 passing through the separating opening 411, and the included angle is θ. The oil-containing refrigerant has a free stroke from the port of the free end of the separation tube 420 to the inner wall of the housing 100, and when the included angle θ is greater than 120 °, the free stroke of the oil-containing refrigerant is shorter, which is unfavorable for the separation of the engine oil from the refrigerant. When the included angle θ is smaller than 45 °, the oil-containing refrigerant may be guided to the outer wall of the inner cover 410, the contact surface between the oil-containing refrigerant and the outer wall of the inner cover 410 is reduced, and the separation speed of the oil droplets from the refrigerant is reduced, thereby reducing the separation effect of the refrigerant and the refrigerator oil. And, when the included angle θ is smaller than 45 °, the free travel of the oil-containing refrigerant from the port at the free end to the outer wall of the inner cover 410 is short, which is unfavorable for the separation of the engine oil from the refrigerant. When the included angle θ is not greater than 120 ° and not less than 45 °, the oil-containing refrigerant can be smoothly guided to the inner wall of the casing 100, and the free travel of the oil-containing refrigerant from the port of the free end of the separation tube 420 to the inner wall of the casing 100 is longer, which is more beneficial to the separation of the engine oil and the refrigerant.

In one embodiment, the inner cover 410 is provided with a first oil return hole 412, and the first oil return hole 412 is disposed at the bottom of the inner cover 410 and is communicated with the separation chamber 430.

Referring to fig. 2, a first oil return hole 412 is formed at the bottom of the inner cover 410, the first oil return hole 412 is communicated with the separation chamber 430, and the oil at the bottom of the housing 100 can return to the inner cover 410 through the first oil return hole 412 and supplement the oil to the pump body assembly 300. It will be appreciated that refrigerant containing oil droplets in suspension flows (is introduced) at high velocity from the separator tube 420 into the separator chamber 430 within the housing 100. The refrigerant containing the oil droplets introduced into the separation chamber 430 forms a velocity difference with the oil droplets along the inner wall surface of the casing 100 by centrifugal force, and the oil droplets flow to the bottom of the casing 100 along the inner wall of the casing 100. After the oil drops accumulate and do not pass through the first oil return hole 412, the oil drops enter the inner cover 410 through the first oil return hole 412, the oil level of the pump body assembly 300 is supplemented, the oil level of the compressor 10 is improved, and meanwhile, the operation reliability of the compressor 10 is greatly improved.

In an embodiment, the compressor 10 further includes an oil baffle 413, the oil baffle 413 is disposed in the separation chamber 430, an inner ring of the oil baffle 413 is connected to the inner cover 410, a space is provided between an outer ring of the oil baffle 413 and the casing 100, and the oil baffle 413 is provided with a through hole.

Referring to fig. 2, the oil deflector 413 is annular and has an inner ring and an outer ring. The oil deflector 413 is sleeved on the outer wall of the inner cover 410, the inner ring of the oil deflector 413 is connected with the outer wall of the inner cover 410, and a space is reserved between the outer ring of the oil deflector 413 and the shell 100. The gaseous refrigerant and the oil droplets form a velocity difference along the inner wall surface of the casing 100, and flow to the bottom of the casing 100 along the inner wall of the casing 100 through the gap between the oil deflector 413 and the casing 100. The oil drops gather to form an oil layer at the bottom of the casing 100, and when the oil drops drop to the oil layer, the oil drops are blocked by the oil baffle 413 even if splashed by the oil drops, so that the splashed oil drops are prevented from being mixed with the refrigerant again, and the separation effect of the refrigerant and the engine oil is prevented from being reduced. On the other hand, since the oil deflector 413 is provided, it is possible to prevent the high-speed gaseous refrigerant from striking the oil layer and being mixed with the engine oil again, thereby preventing the separation effect of the refrigerant from the engine oil from being lowered. The oil deflector 413 is provided with a through hole to further prevent engine oil at the bottom of the housing 100 from splashing.

In one embodiment, the compressor 10 further includes a seal 800, the seal 800 being disposed between the inner shroud 410 and the housing 100 and abutting the inner shroud 410 and the housing 100.

Referring to fig. 1 and 2, the inner cover 410 is disposed in the second accommodating cavity 120, and one end of the inner cover 410, which is close to the motor 200, is connected to the inner wall of the housing 100. A seal 800 is provided at the junction of the inner cover 410 and the inner wall of the housing 100, and the seal 800 abuts against the inner cover 410 and the inner wall of the housing 100. The pump body assembly 300 is prevented from being in a leakage state, and the compressed high-pressure gas is prevented from damaging an oil film between the pump body assembly 300 and the first bearing 510, so that the pump body assembly 300 leaks.

In one embodiment, the compressor 10 further includes a muffler 700, and the muffler 700 is disposed on the inner wall of the first accommodating chamber 110; and/or the silencer 700 is provided to the outer wall of the inner casing 410.

Referring to fig. 1, the separation chamber 430 is filled with a high-pressure gaseous refrigerant, and the housing 100 and the inner cover 410 are made of metal materials. For high frequency mechanical and electromagnetic sounds of the compressor 10, the casing 100 and the inner cover 410 and the separation chamber 430 formed therebetween can reduce radiation noise. To further reduce the radiated noise, a muffler 700 may also be provided. The muffler 700 is provided at an inner wall of the first receiving chamber 110, and/or the muffler 700 is provided at an outer wall of the inner cover 410. The noise damper 700 may use a sound absorbing material having a sound absorbing coefficient greater than α0.2. The silencer 700 can reduce the influence of high-frequency noise, and can greatly reduce the noise in high, medium and low full frequency bands when used in combination with a resistant silencer. Therefore, the use experience of the user is improved, the complaints of the user are reduced, and the market competitiveness is improved.

In one embodiment, the motor body 210 includes a stator 211, the stator 211 is disposed in the first receiving chamber 110, and the stator 211 is coupled to the housing 100 by bolts.

Referring to fig. 1, a motor body 210 includes a stator 211 and a rotor, the rotor is sleeved on a shaft of the motor 200, and the rotor rotates relative to the stator 211 so as to transmit a rotational force of the motor body 210 to a rotary piston of a pump body assembly 300 to compress a refrigerant. The inner wall of the first receiving chamber 110 is formed with a plurality of first protrusions provided with cavities. The outer wall of the stator 211 is provided with a plurality of second protruding parts, the second protruding parts are in one-to-one correspondence with the first protruding parts, and the second protruding parts extend into the cavity to be connected with the first protruding parts so as to realize the connection of the stator 211 and the shell 100. The bolts pass through the first and second protruding portions to fix the stator 211 and the housing 100. The number of the first protruding parts and the second protruding parts can be 3, 4 or 5 respectively, the number of the first protruding parts and the second protruding parts is less than 3, and the structural stability of the compressor is reduced; the number is more than 5, so that the cost is increased, the assembly is complex, and the assembly difficulty is improved. The stator 211 may be a motor stator 211, and the motor stator 211 and the housing 100 are fixed by bolts instead of conventional heat jacket or spot welding, so that on one hand, the motor core loss is greatly reduced, the efficiency of the motor main body 210 is improved, the energy efficiency of the compressor 10 is improved, and the problems of reliability and low-frequency energy efficiency of the small-sized high-speed high-load application motor are solved. On the other hand, the motor hot-set or welding reject ratio is improved. In addition, the outer diameter of the motor can be flexibly adjusted, and the motor can be used for carrying a small-diameter pump body and a large-diameter motor according to the high-speed application requirement, so that the efficiency of the full-band compressor 10 is improved while the high-load high-speed application reliability is met.

The present utility model also provides an air conditioning system, comprising a compressor 10, wherein the compressor 10 comprises a housing 100, a motor 200, a pump body assembly 300, a first air outlet 130 and a second air outlet 140, the housing 100 is provided with an inner cavity, and the inner cavity comprises a first accommodating cavity 110 and a second accommodating cavity 120; the motor 200 includes a motor body 210 and a crankshaft 220, the motor body 210 being disposed in the first receiving chamber 110; the pump body assembly 300 is arranged in the second accommodating cavity 120 and is connected with the motor main body 210 through the crankshaft 220, and the pump body assembly 300 is communicated with the first accommodating cavity 110 and the second accommodating cavity 120; the first exhaust port 130 is provided in the housing 100 and communicates with the first accommodating chamber 110; the second exhaust port 140 is provided in the housing 100 and communicates with the second accommodating chamber 120.

The air conditioning system further comprises an outdoor heat exchanger 50, an indoor heat exchanger 60, a four-way valve 30, a three-way valve 20 and a throttle valve 70, wherein the four-way valve 30 is provided with a first port 31, a second port 32, a third port 33 and a fourth port 34, the first port 31 is connected with a first exhaust port 130, the second port 32 is connected with the outdoor heat exchanger 50, the third port 33 is connected with an air suction port of the compressor 10, and the fourth port 34 is connected with the indoor heat exchanger 60; the three-way valve 20 has a first valve port 21, a second valve port 22, and a third valve port 23, the first valve port 21 is connected to the second exhaust port 140, the second valve port 22 is connected to the first port 31, and the third valve port 23 is connected to the outdoor heat exchanger 50; the throttle valve 70 is provided between the outdoor heat exchanger 50 and the indoor heat exchanger 60, and connects the outdoor heat exchanger 50 and the indoor heat exchanger 60.

Referring to fig. 4, the compressor 10 has a first discharge port 130 and a second discharge port 140 for discharging air, and an air suction port for sucking air. The first exhaust port 130 communicates with the first port 31 of the four-way valve 30, the second exhaust port 140 communicates with the first port 21 of the three-way valve 20, the intake port communicates with the third port 33 of the four-way valve 30, or the intake port communicates with the third port 33 of the four-way valve 30 through a reservoir.

In the cooling mode, the first port 31 and the second port 32 are turned on, the third port 33 and the fourth port 34 are turned on, and the first valve port 21 and the second valve port 22 are turned on. The refrigerant sequentially passes through the first and

second ports

31 and 32 of the four-way valve 30, the outdoor heat exchanger 50, the throttle valve 70, and the indoor heat exchanger 60 from the first exhaust port 130, and then returns to the suction port through the third and

fourth ports

33 and 34 of the four-way valve 30, thereby completing the refrigeration cycle. The refrigerant may further sequentially pass through the first port 21 and the second port 22 of the three-way valve 20 from the second exhaust port 140, and then join with the refrigerant discharged from the first exhaust port 130 through the first port 31 and the second port 32 of the four-way valve 30, thereby completing the refrigeration cycle.

In the heating mode, the first port 31 and the fourth port 34 are connected, the second port 32 and the third port 33 are connected, and the first valve port 21 and the second valve port 22 are connected. The refrigerant sequentially passes through the first and

fourth ports

31 and 34 of the four-way valve 30, the indoor heat exchanger 60, the throttle valve 70, and the outdoor heat exchanger 50 from the first exhaust port 130, and then returns to the suction port through the second and

third ports

32 and 33 of the four-way valve 30, thereby completing the heating cycle. The refrigerant may further sequentially pass through the first port 21 and the second port 22 of the three-way valve 20 from the second exhaust port 140, and then merge with the refrigerant discharged from the first exhaust port 130 through the first port 31 and the fourth port 34 of the four-way valve 30, thereby completing the heating cycle.

In the defrosting mode, the first port 31 and the fourth port 34 are conducted, the second port 32 and the third port 33 are conducted, and the first valve port 21 and the third valve port 23 are conducted. The refrigerant sequentially passes through the first and

fourth ports

third ports

32 and 33 of the four-way valve 30, thereby completing the heating cycle. Meanwhile, the refrigerant is communicated with the outdoor heat exchanger 50 from the second exhaust port 140 through the first valve port 21 and the third valve port 23 of the three-way valve 20, and defrost the outdoor heat exchanger 50.

The refrigerant discharged from the first exhaust port 130 completes the heating cycle and always maintains the heating mode so that the indoor temperature does not drop greatly. The refrigerant discharged from the second exhaust port 140 communicates with the outdoor heat exchanger 50, and defrost the outdoor heat exchanger 50. The indoor heat exchanger 60 is still heating while the outdoor heat exchanger 50 is defrosting, thereby realizing the defrosting function while heating. The problem of the air conditioning system defrosting shut down bring big temperature fluctuation is solved, human perception travelling comfort has been improved. Meanwhile, the four-way valve 30 is not required to be stopped and switched when the air conditioning system heats and defrost, so that the problem of low temperature heating energy efficiency ratio of the air conditioner is avoided.

In one embodiment, the air conditioning system further includes a gas-liquid separator 40, wherein the gas-liquid separator 40 is disposed between the throttle valve 70 and the outdoor heat exchanger 50, and the gas-liquid separator 40 is connected to the outdoor heat exchanger 50 through a first connection pipe 80a, is connected to the throttle valve 70 through a second connection pipe 80b, and is communicated with the third valve port 23 through a third connection pipe 80 c.

Referring to fig. 4 and 5, the gas-liquid separator 40 includes a housing including an upper cover, a lower cover, and a sidewall connecting the upper cover and the lower cover, and the upper cover, the lower cover, and the sidewall are formed with a third receiving chamber. The gas-liquid separator 40 further includes a separation partition 41, the separation partition 41 is disposed in the third accommodating chamber and connected to the inner wall of the housing, and a liquid storage chamber 42 is formed between the separation partition 41 and the lower cover. The separation separator 41 is provided with a vent hole, and the refrigerant entering the gas-liquid separator 40 is separated into gas and liquid, and the liquid refrigerant and engine oil remain in the liquid storage chamber 42.

During defrosting mode, the first cylinder compresses and heats, the second cylinder serves as a quasi-air pump application principle, the exhaust heat of the first cylinder is absorbed, the two-phase state heat in the gas-liquid separator 40 is supplemented, the three-way valve 20 is controlled to switch the rotating speed of the indoor fan to reduce logic, and therefore the defrosting function while heating is achieved, and comfort is improved. Specifically, the first cylinder is compressed and heated, and the refrigerant enters the gas-liquid separator 40 from the throttle valve 70 through the second connection pipe 80 b. Meanwhile, the second cylinder serves as a quasi-air pump application principle, absorbs the heat of the exhaust of the first cylinder, and the refrigerant enters the gas-liquid separator 40 from the three-way valve 20 through the third connecting pipe 80c to supplement the two-phase heat in the gas-liquid separator 40. The outdoor heat exchanger 50 is then defrosted after entering the outdoor heat exchanger 50 through the first connection pipe 80 a.

In one embodiment, the first connecting pipe 80a is provided with a second oil return hole 81.

Referring to fig. 5, the refrigerant enters the gas-liquid separator 40 for gas-liquid separation, and the liquid refrigerant and the engine oil remain in the liquid storage chamber 42. The second cylinder absorbs the heat of the exhaust gas of the first cylinder, and after supplementing the two-phase heat in the gas-liquid separator 40, the liquid refrigerant is vaporized to be discharged out of the gas-liquid separator 40 in a gaseous state. The engine oil returns to the compressor 10 through the second oil return hole 81 along the system pipeline to supplement the oil level of the compressor 10.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all equivalent structural modifications made by the present description and accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. A compressor, comprising:

2. The compressor of claim 1, wherein the pump body assembly includes a first cylinder in communication with the first receiving chamber and a second cylinder in communication with the second receiving chamber.

3. The compressor of claim 2, further comprising a first bearing and a second bearing, a side wall of the first bearing being connected to an inner wall of the housing to divide the interior cavity into the first receiving cavity and the second receiving cavity; the second bearing is arranged in the second accommodating cavity, and the pump body assembly is arranged between the first bearing and the second bearing.

4. The compressor of claim 3, further comprising an inner housing disposed within the second receiving chamber and coupled to the inner wall of the housing, the inner housing being disposed outside of the pump body assembly and the second bearing, a separation chamber being formed between the inner housing and the housing, the separation chamber being in communication with the second exhaust port and the second cylinder.

5. The compressor of claim 4, further comprising a first muffler cover and a second muffler cover, wherein the first muffler cover is provided in the first receiving chamber and is sleeved with the first bearing to form a first resonance chamber, the first resonance chamber is communicated with the first cylinder, the first muffler cover is provided with a communication hole, and the first resonance chamber is communicated with the first receiving chamber through the communication hole;

6. The compressor of claim 4, wherein the inner cover is provided with a separation port; the compressor further comprises a separation pipe, and the separation pipe is communicated with the second cylinder and the separation cavity through the separation port.

7. The compressor of claim 6, wherein a free end of the separation tube is configured to direct refrigerant to an inner wall of the separation chamber, and an opening direction of a port of the free end is angled with respect to a radial direction of the housing passing through the separation port.

8. The compressor of claim 7, wherein the included angle is not greater than 120 ° and not less than 45 °.

9. The compressor of claim 4, wherein the inner cover is provided with a first oil return hole, and the first oil return hole is arranged at the bottom of the inner cover and is communicated with the separation chamber.

10. The compressor of claim 4, further comprising an oil deflector disposed in the separation chamber, an inner ring of the oil deflector being connected to the inner cover, an outer ring of the oil deflector being spaced from the housing, the oil deflector being provided with a through hole.

11. The compressor of claim 4, further comprising a seal disposed between and abutting the inner shroud and the shell.

12. The compressor of claim 4, further comprising a muffler provided on an inner wall of the first receiving chamber; and/or the silencing piece is arranged on the outer wall of the inner cover.

13. The compressor of claim 1, wherein the motor body includes a stator disposed in the first receiving chamber, the stator being bolted to the housing.

14. An air conditioning system comprising a compressor as claimed in any one of claims 1 to 13.

15. The air conditioning system of claim 14, further comprising:

an outdoor heat exchanger and an indoor heat exchanger;

16. The air conditioning system of claim 15, further comprising a gas-liquid separator disposed between the throttle valve and the outdoor heat exchanger, the gas-liquid separator being connected to the outdoor heat exchanger by a first connecting tube, the throttle valve by a second connecting tube, and the third valve port by a third connecting tube.

17. The air conditioning system according to claim 16, wherein the first connecting pipe is provided with a second oil return hole.