CN111336105A

CN111336105A - Scroll compressor and refrigeration equipment

Info

Publication number: CN111336105A
Application number: CN202010118984.9A
Authority: CN
Inventors: 朱晓涵; 林淑敏; 周杏标
Original assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Current assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Priority date: 2020-02-26
Filing date: 2020-02-26
Publication date: 2020-06-26

Abstract

The invention provides a scroll compressor and refrigeration equipment. The scroll compressor includes: a housing having a first exhaust port and a second exhaust port; the compression assembly comprises a movable disc, a first static disc and a second static disc, the movable disc is positioned between the first static disc and the second static disc, the movable disc is meshed with the first static disc to form a first compression cavity, and the movable disc is further meshed with the second static disc to form a second compression cavity; the first compression chamber is communicated with the first exhaust port, the second compression chamber is communicated with the second exhaust port, and the first exhaust port and the second exhaust port are used for exhausting gas with different pressures. The movable disc is respectively meshed with the two fixed discs to form the first compression cavity and the second compression cavity, so that gases with different pressures can be formed in the two compression cavities, and exhaust of different pressures is achieved through the first exhaust port and the second exhaust port respectively. The multi-exhaust-pressure function can be realized only by adopting a plurality of scroll compressors in the related technology, the space is saved, and the cost is reduced.

Description

Scroll compressor and refrigeration equipment

Technical Field

The invention belongs to the technical field of refrigeration equipment, and particularly relates to a scroll compressor and refrigeration equipment.

Background

The scroll compressor in the related art has only a single discharge pressure, and a plurality of compressors are required to be connected to realize a multi-temperature refrigeration system, which leads to an increase in the cost of the product as a whole.

Therefore, how to design a scroll compressor that can provide multiple exhaust pressures simultaneously by using a single compressor is a problem to be solved.

Disclosure of Invention

The present invention is directed to solving one of the technical problems of the prior art or the related art.

To this end, a first aspect of the invention proposes a scroll compressor.

A second aspect of the invention proposes a refrigeration device.

In view of this, according to a first aspect of the present invention, there is provided a scroll compressor including: a housing having a first exhaust port and a second exhaust port; the compression assembly comprises a movable disc, a first static disc and a second static disc, the movable disc is positioned between the first static disc and the second static disc, the movable disc is meshed with the first static disc to form a first compression cavity, and the movable disc is further meshed with the second static disc to form a second compression cavity; the first compression cavity is communicated with the first exhaust port, the second compression cavity is communicated with the second exhaust port, and the first exhaust port and the second exhaust port are used for exhausting gas with different pressures.

The invention provides a scroll compressor including a housing and a compression assembly. Through set up first gas vent and second gas vent on the casing to independently exhaust through these two gas vents, be favorable to discharging the gas of different pressure, thereby realize the function of the double exhaust pressure of single scroll compressor. Specifically, the compression assembly has movable disk, first quiet dish and second quiet dish, through making the movable disk be located between two quiet dishes, makes the movable disk mesh with two quiet dishes respectively in order to form first compression chamber and second compression chamber, is favorable to forming the gas of different pressures in two compression chambeies to realize the exhaust of different pressures through first exhaust port and second exhaust port respectively. The function of multi-exhaust pressure can be realized only by adopting a plurality of scroll compressors in the related technology is avoided, the space is saved, and the cost is reduced; also avoided setting up two sets of compression subassemblies in the casing, adopted two driving disks to mesh the structure complicacy that brings with a quiet dish respectively mutually, the problem such as scroll compressor volume increase. And when the scroll compressor is applied to a refrigerating system, the cascade utilization of energy is realized by connecting a plurality of heat exchangers, and energy is saved.

It should be noted that the first compression chamber and the second compression chamber may change in volume, shape, and the like as the movable disk rotates. The movable disc and the first static disc are enclosed in the rotating process to form a plurality of cavities for gas to enter, flow and be discharged under pressure, and the cavities belong to a first compression cavity, namely the first compression cavity comprises all crescent cavities formed by enclosing the movable disc and the first static disc in the rotating process; and the movable disc and the second static disc enclose in the rotation process to form a plurality of cavities for gas to enter, flow and be discharged under pressure, and the cavities all belong to the second compression cavity, namely the second compression cavity comprises all crescent cavities formed by the movable disc and the second static disc in the rotation process.

In addition, according to the scroll compressor in the above technical solution provided by the present invention, the following additional technical features may be further provided:

in one possible design, the housing further has a suction port, and the first compression chamber and the second compression chamber are both in communication with the suction port.

In the design, the shell can be provided with a suction port, so that the first compression chamber and the second compression chamber are communicated with the suction port, namely, gas is introduced through the suction port for compression, thereby reducing the processing steps of the shell and improving the sealing property of the shell. For example, the air suction port is communicated with the first compression cavity through a first air inlet channel on the first static disc, a second air inlet channel communicated with each other is further formed on the first static disc and the second static disc, and the second air inlet channel is communicated with the first air inlet channel and the second compression cavity, so that the two compression cavities are communicated with one air suction port. For another example, the suction port communicates with the first compression chamber through a first inlet passage in the first stationary plate, and the suction port also communicates with the second compression chamber through a second inlet passage in the second stationary plate. And are not limited to the above examples.

The air suction port can be directly communicated with the first air inlet channel or the second air inlet channel, can also be communicated with the first air inlet channel or the second air inlet channel through the inner cavity of the shell, and can also be communicated with the first air inlet channel or the second air inlet channel through an air suction channel, such as an air suction pipe, so as to be communicated with the two compression cavities.

In one possible design, the housing also has two suction ports, one of which communicates with the first compression chamber and the other of which communicates with the second compression chamber.

In this design, through set up two ports of breathing in on the casing for first compression chamber breathes in through one of them port of breathing in, and the second compression chamber breathes in through another port of breathing in, can effectively avoid two compression chambers to breathe in the confusion and influence the effect of breathing in.

In one possible design, the movable disc comprises a first spiral part facing the first fixed disc and a second spiral part facing the second fixed disc, the first fixed disc is provided with a third spiral part, the second fixed disc is provided with a fourth spiral part, the first spiral part is meshed with the third spiral part, and the second spiral part is meshed with the fourth spiral part; the first compression cavity comprises a first air suction cavity and a second air suction cavity; the second compression cavity comprises a third suction cavity and a fourth suction cavity; the first air suction cavity is formed by enclosing the outer side wall of the first spiral part and the third spiral part and is positioned at the end part of the first spiral part positioned at the periphery; the second air suction cavity is formed by enclosing the inner side wall of the first spiral part and the third spiral part and is positioned at the end part of the first spiral part positioned at the periphery; the third air suction cavity is formed by enclosing the outer side wall of the second spiral part and the fourth spiral part and is positioned at the end part of the second spiral part positioned at the periphery; the fourth air suction cavity is formed by enclosing the inner side wall of the second spiral part and the fourth spiral part and is positioned at the end part of the second spiral part positioned at the periphery.

Further, the exhaust pressure of the first exhaust port is less than the exhaust pressure of the second exhaust port; the ratio of the suction volume of the first compression cavity to the suction volume of the second compression cavity ranges from 0.6 to 1.9; the air suction volume of the first compression cavity is the sum of the volume of the first air suction cavity and the volume of the second air suction cavity; the suction volume of the second compression cavity is the sum of the volume of the third suction cavity and the volume of the fourth suction cavity.

In this design, the exhaust pressure of the first exhaust port is specifically defined to be smaller than the exhaust pressure of the second exhaust port, for example, the first exhaust port is a medium pressure exhaust port and the second exhaust port is a high pressure exhaust port. The ratio of the suction volume of the first compression cavity to the suction volume of the second compression cavity is 0.6-1.9, namely the ratio of the suction volume of the first compression cavity with lower exhaust pressure to the suction volume of the second compression cavity with higher exhaust pressure is 0.6-1.9, so that the energy efficiency of the scroll compressor is improved.

Wherein, first quiet dish and second quiet dish can be located the upper and lower both sides of driving disk respectively to first quiet dish both can be located the top of driving disk, still can be located the below of driving disk. The suction volume Vsmax1 of the first compression chamber, which is not limited by the extension of the spiral portion, can be expressed as the product of the crescent-shaped area Asmax1 at maximum suction and the height H1 of the first spiral portion of the rotor disk. The suction volume Vsmax2 of the second compression chamber, which is expressed as the product of the crescent-shaped area Asmax2 at maximum suction and the height H2 of the second spiral of the rotor, is not limited to the extension of the spiral.

The sizes of the maximum inspiration crescent area Asmax1 and the maximum inspiration crescent area Asmax2 are specifically as follows:

the movable disc divides the first compression cavity into a plurality of cavities in the process of moving relative to the first fixed disc, and a first air suction cavity and a second air suction cavity which are mutually independent are sequentially formed, wherein the first air suction cavity is formed by surrounding the outer side wall of the first spiral part and the third spiral part and is positioned at the end part of the third spiral part positioned at the periphery, the second air suction cavity is formed by surrounding the inner side wall of the first spiral part and the third spiral part and is positioned at the end part of the third spiral part positioned at the periphery, the air suction volume of the first compression cavity is defaulted to be the sum of the maximum volume of the first air suction cavity and the maximum volume of the second air suction cavity, for example, when the first spiral part and the third spiral part are in a symmetrical involute type, the maximum volume of the first air suction cavity is equal to the maximum volume of the second air suction cavity, the maximum area Asamax of the first air suction cavity, namely the cross section area of the first air suction cavity at the maximum air suction volume, and the maximum area Asbmax of the second air suction cavity, namely the cross section area of the second air suction cavity at the maximum area of the Asbmax of the second air suction cavity is equal to the maximum area of the Asbmax of the second air suction cavity, namely, the Asbmax.

Similarly, the movable disc divides the second compression cavity into a plurality of cavities in the process of moving relative to the second fixed disc, and a third air suction cavity and a fourth air suction cavity which are independent from each other are sequentially formed, wherein the third air suction cavity is formed by surrounding the outer side wall of the second spiral part and the fourth spiral part and is positioned at the end part of the outer periphery of the fourth spiral part, the air suction volume of the second compression cavity is determined as the sum of the maximum volume of the third air suction cavity and the maximum volume of the fourth air suction cavity by default, for example, when the second spiral part and the fourth spiral part are in a symmetrical involute type, the maximum volume of the third air suction cavity is equal to the maximum volume of the fourth air suction cavity, the maximum area Ascmax of the third air suction cavity, namely the cross-sectional area of the third air suction cavity at the maximum volume, is equal to the maximum area of the fourth air suction cavity, namely the cross-sectional area of the fourth air suction cavity at the maximum volume, and when the cross-sectional area of the third air suction cavity at the third air suction cavity is equal to the maximum area of the Ascmax, namely, the cross-sectional area of the Ascmax of the fourth air suction cavity is equal to the maximum area of the Ascmax of the second spiral part, namely, when the second spiral part is in an involute type, and the Ascmax of.

Further, the method is carried out. The movable disc further comprises a main body part, and the first spiral part and the second spiral part are distributed on two sides of the main body part and are integrally formed with the main body part. The first and second spirals may be helical profiles, the third and fourth spirals being configured as helically extending grooves.

Wherein the discharge pressure of the first discharge port, that is, the discharge pressure of the first compression chamber, is defined as a pressure at which the engagement of the first spiral part with the third spiral part is completed. The discharge pressure of the second discharge port, i.e., the discharge pressure of the second compression chamber, is defined as a pressure at which the engagement of the second spiral part with the fourth spiral part is completed.

In one possible design, the first spiral and the third spiral are of the symmetrical involute type; or the first spiral part and the third spiral part are in an asymmetric involute type; or the first helix and/or the third helix are of an archimedean helix; or the second spiral part and the fourth spiral part are in a symmetrical involute type; or the second spiral part and the fourth spiral part are in an asymmetric involute type; or the second helix and/or the fourth helix are of an archimedean helix.

In the design, the first spiral part and the third spiral part can be distributed in a symmetrical involute type, and the second spiral part and the fourth spiral part can also be distributed in a symmetrical involute type, so that the processing is convenient. Or the first spiral part and the third spiral part are in an asymmetric involute type, and the second spiral part and the fourth spiral part are in an asymmetric involute type, so that the requirements of different air suction volumes and exhaust pressures are met. The first spiral part and/or the third spiral part may be distributed in an archimedean spiral pattern, the second spiral part and/or the fourth spiral part may be distributed in an archimedean spiral pattern, and the spiral parts may be distributed in an algebraic spiral pattern, an involute pattern, a modified profile, or the like.

In one possible design, the suction port communicates with the interior cavity of the housing; the scroll compressor further comprises a first exhaust passage and a second exhaust passage which are independent of each other, the first compression cavity is communicated with the first exhaust port through the first exhaust passage, and the second compression cavity is communicated with the second exhaust port through the second exhaust passage.

In this design, the suction port is specifically communicated through the inner cavity of the housing, that is, the suction port is communicated through the inner cavity of the housing with the first compression chamber and the second compression chamber, so that the inner cavity of the housing is in a low back pressure structure. So that the first compression chamber is communicated with the first exhaust port through the first exhaust passage and the second compression chamber is communicated with the second exhaust port through the second exhaust passage. The first exhaust passage and the second exhaust passage are independent of each other, are not communicated with each other, and are independent of the inner cavity of the housing.

Furthermore, the first exhaust channel is a first exhaust pipe and is communicated with a first air outlet which is formed in the first static disc and communicated with the first compression cavity; the second exhaust passage is a second exhaust pipe and is communicated with a second air outlet which is arranged on the second static disc and is communicated with the second compression cavity.

Further, the scroll compressor also includes a seal assembly sealing the junction of the first discharge passage with the compression assembly and the housing, and sealing the junction of the second discharge passage with the compression assembly and the housing.

In one possible design, the second compression chamber communicates with the second exhaust port via an inner chamber of the housing; the scroll compressor further comprises a suction passage and a first exhaust passage, the suction port is communicated with the suction passage, and the first compression cavity is communicated with the first exhaust port through the first exhaust passage.

In the design, the second compression cavity is communicated with the second exhaust port through the inner cavity of the shell, so that the inner cavity of the shell is in a middle back pressure structure. The suction port is communicated with the first compression cavity and the second compression cavity through the suction channel, and the first compression cavity is communicated with the first exhaust port through the first exhaust channel. The air suction channel is independent of the inner cavity of the shell and is not communicated with the inner cavity of the shell, and the first exhaust channel is independent of the inner cavity of the shell and is not communicated with the inner cavity of the shell. The air suction channel comprises a first air suction channel and a second air suction channel, and of course, the air suction channel can also comprise an air suction pipe which is communicated with the corresponding air suction channel and the air suction port.

Further, the air suction channel comprises a first air suction pipe and a second air suction pipe, and the first air suction pipe is communicated with a first air suction channel which is arranged on the first static disc and communicated with the first compression cavity; the second air suction pipe is communicated with a second air inlet channel which is arranged on the second static disc and communicated with the second compression cavity.

Further, the scroll compressor also comprises a sealing assembly for sealing the connection between the suction passage and the compression assembly and the shell, and sealing the connection between the first exhaust passage and the compression assembly and the shell.

In one possible design, the first compression chamber communicates with the first exhaust port via an inner chamber of the housing; the scroll compressor further comprises a suction passage and a second discharge passage, the suction port is communicated with the suction passage, and the second compression chamber is communicated with the second discharge port through the second discharge passage.

In this design, the first compression chamber is specifically made to communicate with the first exhaust port via the inner chamber of the housing, making the inner chamber of the housing a high back pressure configuration. The air suction port is communicated with the first compression cavity and the second compression cavity through the air suction channel, and the second compression cavity is communicated with the second exhaust port through the second exhaust channel. The air suction channel is independent of the inner cavity of the shell and is not communicated with the inner cavity of the shell, and the second air exhaust channel is independent of the inner cavity of the shell and is not communicated with the inner cavity of the shell. The air suction channel comprises a first air suction channel and a second air suction channel, and of course, the air suction channel can also comprise an air suction pipe which is communicated with the corresponding air suction channel and the air suction port.

Further, the scroll compressor further comprises a sealing assembly for sealing the connection between the second suction passage and the compression assembly and the housing, and for sealing the connection between the second discharge passage and the compression assembly and the housing.

In one possible design, the scroll compressor further includes: a motor assembly; and the crankshaft is connected with the motor assembly and penetrates through the first static disc or the second static disc to be connected with the movable disc.

In this design, the scroll compressor still includes motor element and bent axle, and motor element drive bent axle rotates, and then drives the driving disk rotation. Because the movable disk is located between first quiet dish and the quiet dish of second, then the bent axle can pass first quiet dish and be connected with the movable disk, and at this moment, first quiet dish is located one side that the movable disk is close to motor element, perhaps the bent axle passes the quiet dish of second and is connected with the movable disk, and at this moment, the quiet dish of second is located one side that the movable disk is close to motor element.

In one possible design, the scroll compressor is a vertical compressor.

A second aspect of the present invention provides a refrigeration apparatus comprising: a scroll compressor as claimed in any one of the preceding claims.

The refrigeration equipment provided by the invention has the beneficial effects of any one of the above technical schemes due to the fact that the refrigeration equipment is provided with the scroll compressor of any one of the above technical schemes, and the details are not repeated herein.

In one possible design, the refrigeration appliance further comprises: a first condenser in communication with a first discharge port of the scroll compressor; a first throttling element communicated with the first condenser; the first evaporator is communicated with the first throttling element and is also communicated with a suction port of the scroll compressor; a second condenser in communication with a second discharge port of the scroll compressor; a second throttling element communicated with the second condenser; and the second evaporator is communicated with the second throttling element and is also communicated with a suction port of the scroll compressor.

In the design, the scroll compressor and the first condenser, the first throttling element and the first evaporator form a first group of refrigeration system, the scroll compressor and the second condenser, the second throttling element and the second evaporator form a second group of refrigeration system, and two groups of refrigeration systems which are mutually independent are adopted, namely, the refrigeration equipment realizes the multi-exhaust function realized by a plurality of scroll compressors in the related technology through one scroll compressor, the processing cost of the refrigeration equipment is reduced, the occupied space of the refrigeration equipment is also reduced, the convenience in installation of the internal parts of the refrigeration equipment is improved, because the exhaust pressures of two exhaust ports are different, the exhaust pressures reaching the first condenser and the second condenser are different, the refrigeration equipment can have double condensation temperatures and double evaporation temperatures, the cascade utilization of energy is facilitated, and the energy efficiency of the refrigeration equipment is improved. Particularly, when the displacement of the two exhaust ports is different, the amounts of the refrigerants condensed by the first condenser and the second condenser are different, and the energy efficiency of the refrigeration equipment is further improved.

In one possible design, the refrigeration appliance further comprises: the first evaporator is communicated with a suction port of the scroll compressor through the first liquid storage device, and the second evaporator is communicated with the suction port of the scroll compressor through the second liquid storage device; or the first evaporator and the second evaporator are communicated with a suction port of the scroll compressor through the third liquid storage device.

In this design, a first accumulator is provided between the first evaporator and the suction port of the scroll compressor, and a second accumulator is provided between the second evaporator and the suction port of the scroll compressor; or a third accumulator may be provided between the two evaporators and the suction port of the scroll compressor. Through the liquid refrigerant of reservoir storage, can avoid a large amount of liquid to get into scroll compressor and cause the impact to scroll compressor, influence scroll compressor's effective operation.

In one possible design, the refrigeration appliance further comprises: a first condenser in communication with a first discharge port of the scroll compressor; a first throttling element communicated with the first condenser; a second condenser in communication with a second discharge port of the scroll compressor; a second throttling element communicated with the second condenser; and the third evaporator is communicated with the first throttling element and the second throttling element, and is also communicated with a suction port of the scroll compressor.

In the design, the two condensers are arranged, so that the first condenser is communicated with the first exhaust port of the scroll compressor, the second condenser is communicated with the second exhaust port of the scroll compressor, and the first exhaust port and the second exhaust port are used for exhausting gas with different pressures, so that exhaust pressures reaching the first condenser and the second condenser are different, the refrigeration equipment can have double condensation temperatures, the cascade utilization of energy is facilitated, and the energy efficiency of the refrigeration equipment is improved. Of course, the two condensers are respectively communicated with one evaporator through throttling elements, and the heat is absorbed through concentrated evaporation.

In one possible design, the refrigeration appliance further comprises: and the third accumulator is communicated with a suction port of the scroll compressor through the third accumulator.

In this design, through set up the third reservoir between third evaporimeter and scroll compressor's the port of breathing in, through the liquid refrigerant of reservoir storage, can avoid a large amount of liquid to get into scroll compressor and cause the impact to scroll compressor, influence scroll compressor's effective operation.

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

The above and/or 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 illustrates a top view schematic of a scroll compressor in accordance with an embodiment of the present invention;

FIG. 2 illustrates another schematic top view of a scroll compressor in accordance with an embodiment of the present invention;

FIG. 3 shows a schematic structural view of a rotor plate of one embodiment of the present invention;

FIG. 4 is a schematic top view of a cam plate of an embodiment of the present invention;

FIG. 5 is a schematic bottom view of the cam plate of one embodiment of the present invention;

FIG. 6 illustrates a schematic view, partially in section, of a scroll compressor of one embodiment of the present invention;

FIG. 7 shows a schematic view in partial cross-section of a scroll compressor of another embodiment of the present invention;

FIG. 8 shows a schematic view in partial cross-section of a scroll compressor of yet another embodiment of the present invention;

FIG. 9 shows a schematic partial cross-sectional view of a scroll compressor of yet another embodiment of the present invention;

FIG. 10 shows a schematic view in partial cross-section of a scroll compressor of yet another embodiment of the present invention;

FIG. 11 shows a schematic view in partial cross-section of a scroll compressor of yet another embodiment of the present invention;

fig. 12 shows a schematic configuration of a refrigeration apparatus according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 12 is:

100 scroll compressor, 110 housing, 111 suction port, 112 first discharge port, 113 second discharge port, 120 compression assembly, 121 moving plate, 1211 body portion, 1212 first spiral, 1213 second spiral, 122 first stationary plate, 1221 third spiral, 1222 first outlet, 123 second stationary plate, 1231 fourth spiral, 1232 second outlet, 124 first compression chamber, 1241 first suction chamber, 1242 second suction chamber, 125 second compression chamber, 130 suction passage, 140 first discharge passage, 150 second discharge passage, 160 crankshaft, 200 refrigeration unit, 210 first condenser, 220 first throttling element, 230 second condenser, 240 second throttling element, 250 third evaporator.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A scroll compressor 100 and a refrigeration apparatus 200 according to some embodiments of the present invention are described below with reference to fig. 1 to 12.

The first embodiment is as follows:

as shown in fig. 6 to 11, a scroll compressor 100 includes: a housing 110 having a first exhaust port 112 and a second exhaust port 113 formed thereon; a compression assembly 120 including a movable plate 121, a first stationary plate 122 and a second stationary plate 123, the movable plate 121 being located between the first stationary plate 122 and the second stationary plate 123, the movable plate 121 engaging with the first stationary plate 122 to form a first compression chamber 124, the movable plate 121 further engaging with the second stationary plate 123 to form a second compression chamber 125; wherein the first compression chamber 124 communicates with the first discharge port 112, the second compression chamber 125 communicates with the second discharge port 113, and the first discharge port 112 and the second discharge port 113 are used to discharge gas of different pressures.

The scroll compressor 100 provided by the present invention includes a housing 110 and a compression assembly 120. By providing the first and second exhaust ports on the housing 110 and exhausting gas independently through the two exhaust ports, it is beneficial to exhaust gases of different pressures, thereby achieving the dual exhaust pressure function of a single scroll compressor 100. Specifically, the compression assembly 120 has a movable plate 121, a first stationary plate 122 and a second stationary plate 123, and by positioning the movable plate 121 between the two stationary plates, the movable plate 121 engages with the two stationary plates to form a first compression chamber 124 and a second compression chamber 125, respectively, which are beneficial to forming gas with different pressures in the two compression chambers, thereby achieving exhaust with different pressures through the first exhaust port 112 and the second exhaust port 113, respectively. The function of multi-exhaust pressure can be realized only by adopting a plurality of scroll compressors 100 in the related technology is eliminated, the space is saved, and the cost is reduced; the problems of complex structure, volume increase of the scroll compressor 100 and the like caused by the fact that two groups of compression assemblies 120 need to be arranged in the shell 110 and two movable disks 121 are respectively meshed with one static disk are solved. Moreover, when the scroll compressor 100 is applied to a refrigeration system, it is advantageous to connect a plurality of heat exchangers to realize the step use of energy, thereby saving energy.

It should be noted that the first compression chamber 124 and the second compression chamber 125 may change in volume, shape, and the like as the movable disk 121 rotates. The movable disc 121 and the first stationary disc 122 enclose in the rotation process to form a plurality of cavities for gas to enter, flow and be discharged under pressure, which all belong to the first compression cavity 124, that is, the first compression cavity 124 comprises all crescent cavities formed by enclosing the movable disc 121 and the first stationary disc 122 in the rotation process; and a plurality of cavities formed by the surrounding of the movable disc 121 and the second static disc 123 in the rotating process and used for air entering, flowing and pressure discharge belong to the second compression cavity 125, namely the second compression cavity 125 comprises all crescent-shaped cavities formed by the surrounding of the movable disc 121 and the second static disc 123 in the rotating process.

In addition, nowadays, with the improvement of quality of life and the increasing importance of energy conservation and environmental protection, the multi-exhaust pressure compressor generated according to the trend of energy conservation realizes multiple condensation pressures by adopting a multi-exhaust structure, is widely concerned about the utilization of energy cascade, realizes the functions which can be realized by adopting two compressors originally, effectively saves space and reduces the manufacturing cost. However, the present invention is applied to a rolling rotor compressor, and the scroll compressor 100 is of little concern. However, in the scroll compressor, due to the principle that the spiral parts of the movable disk 121 and the stationary disk are engaged with each other, the compression chamber is naturally divided into a plurality of crescent-shaped cavities with different pressures, and compared with the scroll compressor which uses a multi-slide sheet or multi-cylinder type rolling rotor, it is undoubtedly simpler to perform the exhaust through the cavities with different pressures. However, in order to avoid the air leakage of each cavity in the engagement process of the spiral part, the volume efficiency is reduced, and except for the cavity with the maximum pressure, namely except for the cavity for discharging the pressure at the end of the engagement of the spiral part, the hole diameter of the exhaust hole communicated with the cavity with lower relative pressure is smaller, which undoubtedly causes larger exhaust loss. And combine together through adopting a driving disk 121 and a plurality of quiet dishes, specifically combine together with two quiet dishes, with only adopting a driving disk 121 and a quiet dish, the cavity through a plurality of crescent of formation between the two exhausts and compares, can effectively guarantee the displacement, avoids exhaust loss, ensures exhaust efficiency.

Further, as shown in fig. 6 to 11, the first stationary disk 122, the movable disk 121, and the second stationary disk 123 are sequentially distributed from top to bottom, or the second stationary disk 123, the movable disk 121, and the first stationary disk 122 are sequentially distributed from top to bottom.

Example two:

in the first embodiment, as shown in fig. 1 and 2, the housing 110 is further defined to have an air suction port 111, and the first compression chamber 124 and the second compression chamber 125 are both communicated with the air suction port 111.

In this embodiment, by making both the first compression chamber 124 and the second compression chamber 125 communicate with the suction port 111, that is, by introducing gas through the suction port 111 for compression, the number of processing steps of the housing 110 is reduced, and the sealability of the housing 110 is improved. For example, the suction port 111 communicates with the first compression chamber 124 through a first intake passage on the first stationary disk 122, and a second intake passage communicating with each other is further opened on the first stationary disk 122 and the second stationary disk 123, and the second intake passage communicates with the first intake passage and the second compression chamber 125, so that both the compression chambers communicate with one suction port 111. For another example, the suction port 111 communicates with the first compression chamber 124 through a first suction passage on the first stationary plate 122, and the suction port 111 also communicates with the second compression chamber 125 through a second suction passage on the second stationary plate 123. And are not limited to the above examples.

The air intake port 111 may be directly connected to the first air intake channel or the second air intake channel, or connected to the first air intake channel or the second air intake channel through an inner cavity of the housing 110, or connected to the first air intake channel or the second air intake channel through an air intake channel 130, such as an air intake pipe, to connect to the two compression chambers.

Example three:

in contrast to the embodiment, the housing 110 has two suction ports 111, and one of the two suction ports 111 communicates with the first compression chamber 124 and the other communicates with the second compression chamber 125.

By providing two air suction ports 111 on the housing 110, the first compression chamber 124 sucks air through one of the air suction ports 111, and the second compression chamber 125 sucks air through the other air suction port 111, so that the air suction effect is effectively prevented from being affected by the disordered air suction of the two compression chambers.

Example four:

on the basis of the second or third embodiment, it is further defined that the exhaust pressure of the first exhaust port 112 is smaller than the exhaust pressure of the second exhaust port 113. And on the basis, the connection mode of the air suction port 111, the first exhaust port 112 and the second exhaust port 113 and two compression chambers is further defined.

In a particular embodiment, as shown in fig. 6 and 7, the suction port 111 communicates with the interior cavity of the housing 110; the scroll compressor 100 further includes first and

second discharge passages

140, 150 that are independent of each other, with the first compression pocket 124 communicating with the first discharge port 112 through the first discharge passage 140 and the second compression pocket 125 communicating with the second discharge port 113 through the second discharge passage 150.

In this embodiment, the suction port 111 is specifically communicated with the inner cavity of the housing 110, that is, the suction port 111 is communicated with the first compression chamber 124 and the second compression chamber 125 through the inner cavity of the housing 110, so that the inner cavity of the housing 110 is in a low back pressure structure. Such that the first compression chamber 124 communicates with the first discharge port 112 through the first discharge passage 140 and the second compression chamber 125 communicates with the second discharge port 113 through the second discharge passage 150. The first exhaust passage 140 and the second exhaust passage 150 are independent of each other, are not communicated with each other, and are independent of the inner cavity of the housing 110. Fig. 6 shows that the first stationary disc 122, the movable disc 121 and the second stationary disc 123 are sequentially distributed from top to bottom, and fig. 7 shows that the second stationary disc 123, the movable disc 121 and the first stationary disc 122 are sequentially distributed from top to bottom.

Further, the first exhaust passage 140 is a first exhaust pipe, and is communicated with a first air outlet 1222 of the first stationary plate 122, which is communicated with the first compression chamber 124; the second exhaust passage 150 is a second exhaust pipe, and is communicated with a second air outlet 1232 of the second stationary disk 123, which is communicated with the second compression chamber 125.

Further, the scroll compressor 100 also includes a seal assembly sealing the connection of the first discharge passage 140 to the compression assembly 120, the housing 110, and the connection of the second discharge passage 150 to the compression assembly 120, the housing 110.

In another specific embodiment, as shown in fig. 8 and 9, the second compression chamber 125 communicates with the second discharge port 113 through the inner cavity of the housing 110; the scroll compressor 100 further includes a suction passage 130 and a first discharge passage 140, the suction port 111 communicating with the suction passage 130, and the first compression chamber 124 communicating with the first discharge port 112 via the first discharge passage 140.

In this embodiment, the second compression chamber 125 is connected to the second exhaust port via the inner cavity of the housing 110, so that the inner cavity of the housing 110 is in a middle-back pressure configuration. So that the suction port 111 communicates the first compression chamber 124 and the second compression chamber 125 through the suction passage 130, and the first compression chamber 124 communicates the first discharge port 112 through the first discharge passage 140. The air suction channel 130 is independent of the inner cavity of the housing 110 and is not communicated with the inner cavity of the housing 110, and the first exhaust channel 140 is independent of the inner cavity of the housing 110 and is not communicated with the inner cavity of the housing 110. The air suction passage 130 includes a first air suction passage and a second air suction passage, and of course, the air suction passage 130 may further include an air suction pipe communicating the corresponding air suction passage with the air suction port 111. Wherein, fig. 8 shows that first static dish 122, movable disk 121 and second static dish 123 distribute from top to bottom in proper order, and fig. 9 shows that second static dish 123, movable disk 121 and first static dish 122 distribute from top to bottom in proper order.

Further, the suction passage 130 includes a first suction pipe and a second suction pipe, the first suction pipe communicates with a first suction passage on the first stationary plate 122 communicating with the first compression chamber 124; the second suction pipe communicates with a second intake passage of the second stationary disk 123 communicating with the second compression chamber 125.

Further, the scroll compressor 100 also includes a seal assembly sealing the connection of the suction passage 130 to the compression assembly 120, the housing 110, and the connection of the first discharge passage 140 to the compression assembly 120, the housing 110.

In another specific embodiment, as shown in fig. 10 and 11, the first compression chamber 124 communicates with the first exhaust port 112 through an inner cavity of the housing 110; the scroll compressor 100 further includes a suction passage 130 and a second discharge passage 150, the suction port 111 communicating with the suction passage 130, and the second compression chamber 125 communicating with the second discharge port 113 via the second discharge passage 150.

In this embodiment, the first compression chamber 124 is communicated with the first exhaust port 112 via the inner cavity of the housing 110, so that the inner cavity of the housing 110 is in a high back pressure configuration. So that the suction port 111 communicates the first compression chamber 124 and the second compression chamber 125 through the suction passage 130, and the second compression chamber 125 communicates the second discharge port 113 through the second discharge passage 150. The air suction channel 130 is independent of the inner cavity of the housing 110 and is not communicated with the inner cavity of the housing 110, and the second air discharge channel 150 is independent of the inner cavity of the housing 110 and is not communicated with the inner cavity of the housing 110. The air suction passage 130 includes a first air suction passage and a second air suction passage, and of course, the air suction passage 130 may further include an air suction pipe communicating the corresponding air suction passage with the air suction port 111. Wherein, fig. 10 shows that first static dish 122, movable disk 121 and second static dish 123 distribute from top to bottom in proper order, and fig. 11 shows that second static dish 123, movable disk 121 and first static dish 122 distribute from top to bottom in proper order.

Further, the scroll compressor 100 also includes a seal assembly sealing the junction of the second suction passage 130 with the compression assembly 120 and the housing 110, and sealing the junction of the second discharge passage 150 with the compression assembly 120 and the housing 110.

Example five:

on the basis of the fourth embodiment, the ratio of the suction volume of the first compression chamber 124 to the suction volume of the second compression chamber 125 is further limited to a value in the range of 0.6 to 1.9.

In this embodiment, the ratio of the suction volume of the first compression chamber 124 to the suction volume of the second compression chamber 125 is 0.6 to 1.9, i.e. the ratio of the suction volume of the first compression chamber 124 having a lower discharge pressure to the suction volume of the second compression chamber 125 having a higher discharge pressure is 0.6 to 1.9, which is beneficial to improve the energy efficiency of the scroll compressor 100.

As shown in fig. 3 to 5, the movable plate 121 includes a first spiral portion 1212 facing the first fixed plate 122 and a second spiral portion 1213 facing the second fixed plate 123, the first fixed plate 122 has a third spiral portion 1221, the second fixed plate 123 has a fourth spiral portion 1231, the first spiral portion 1212 and the third spiral portion 1221 are engaged, and the second spiral portion 1213 and the fourth spiral portion 1231 are engaged. Further, the first stationary plate 122 and the second stationary plate 123 may be respectively located at upper and lower sides of the movable plate 121, and the first stationary plate 122 may be located both above the movable plate 121 and below the movable plate 121. The suction volume Vsmax1 of the first compression chamber 124 may be expressed as the product of the crescent-shaped area Asmax1 and the height H1 of the first spiral portion 1212 of the cam disc 121 at the time of maximum suction, where the maximum suction volume is not limited to the extension of the spiral portion. The suction volume Vsmax2 of the second compression chamber 125 may be expressed as the product of the crescent-shaped area Asmax2 and the height H2 of the second spiral portion 1213 of the cam disc 121 at the time of maximum suction, where the maximum suction volume is not limited to the extension of the spiral portion.

the movable plate 121 divides the first compression chamber 124 into a plurality of chambers during movement relative to the first stationary plate 122, and sequentially forms a first suction chamber 1241 and a second suction chamber 1242 which are independent of each other, as shown in fig. 1 and 2, the first suction chamber 1241 is formed by enclosing an outer side wall of the first spiral portion 1212 and the third spiral portion 1221 and is located at an end portion of the first spiral portion 1212 at the outer circumference, and the second suction chamber 1242 is formed by enclosing an inner side wall of the first spiral portion 1212 and the third spiral portion 1221 and is located at an end portion of the first spiral portion 1212 at the outer circumference, the suction volume of the first compression chamber 124 is equal to the sum of the maximum volume of the first suction chamber 1241 and the maximum volume of the second suction chamber 1242, for example, when the first spiral portion 1212 and the third spiral portion 1221 are formed in a symmetrical involute shape, the maximum volume of the first suction chamber 1241 is equal to the maximum volume of the second suction chamber 1242, and when the maximum area of the first suction chamber 1241, namely the maximum area of the first suction chamber 1241, the maximum area of the first suction chamber asammax, the maximum area of the first suction chamber 1242, and the maximum area of the asammax, the maximum Asbmax of the first suction chamber 1242, and the maximum area of the maximum Asbmax × when the maximum area of the first suction chamber 1242, the Asbmax + the maximum amamax, the maximum asammax of the Asbmax ×.

Similarly, the moving plate 121, while moving relative to the second stationary plate 123, divides the second compression chamber 125 into a plurality of chambers, and sequentially forms a third suction chamber (not shown) and a fourth suction chamber (not shown) independent of each other, the third suction chamber is formed by surrounding the outer sidewall of the second spiral portion 1213 and the fourth spiral portion 1231 and is located at the end of the second spiral portion 1213 at the outer periphery, the fourth suction chamber is formed by surrounding the inner sidewall of the second spiral portion 1213 and the fourth spiral portion 1231 and is located at the end of the second spiral portion 1213 at the outer periphery, the suction volume of the second compression chamber 125 is equal to the sum of the maximum volume of the third suction chamber and the maximum volume of the fourth suction chamber, for example, when the second spiral portion 1213 and the fourth spiral portion 1231 are in a symmetrical involute form, the maximum volume of the third suction chamber is equal to the maximum volume of the fourth suction chamber, the maximum area ascmx of the third suction chamber is equal to the maximum volume of the fourth suction chamber, when the cross-sectional area of the third suction chamber is equal to the maximum volume of the third suction chamber, when the third suction chamber is in an involute form ascmx, when the maximum area of the third suction chamber is equal to the maximum area of the maximum aspix of the Ascmax of the third suction chamber, when the third suction chamber is equal to the maximum area of the maximum aspix of the third suction chamber, when the.

Example six:

in addition to any of the above embodiments, as shown in fig. 4 and 5, it is further defined that the movable plate 121 includes a first spiral portion 1212 facing the first stationary plate 122 and a second spiral portion 1213 facing the second stationary plate 123, the first stationary plate 122 has a third spiral portion 1221 thereon, the second stationary plate 123 has a fourth spiral portion 1231 thereon, the first spiral portion 1212 and the third spiral portion 1221 are engaged, and the second spiral portion 1213 and the fourth spiral portion 1231 are engaged.

In this embodiment, as shown in fig. 6 to 11, the first spiral portion 1212 is engaged with the third spiral portion 1221 to form the first compression chamber 124, and the second spiral portion 1213 is engaged with the fourth spiral portion 1231 to form the second compression chamber 125. Further, the movable plate 121 further includes a main body 1211, and the first spiral portion 1212 and the second spiral portion 1213 are distributed on both sides of the main body 1211 and are integrally formed with the main body 1211. The first and

second spiral portions

1212 and 1213 may be helical lines, and the third and

fourth spiral portions

1221 and 1231 are configured as helically extending grooves.

Here, the discharge pressure of the first discharge port 112, that is, the discharge pressure of the first compression chamber 124, is defined as a pressure at the end of the engagement of the first spiral portion 1212 with the third spiral portion 1221. The discharge pressure of the second discharge port 113, that is, the discharge pressure of the second compression chamber 125, is defined as a pressure at the end of the engagement of the second spiral portion 1213 with the fourth spiral portion 1231.

Further, the first spiral portion 1212 and the third spiral portion 1221 have a symmetrical involute shape; or the first spiral portion 1212 and the third spiral portion 1221 have an asymmetric involute shape; or the first and/or third

helical portions

1212, 1221 are in the archimedes' helical line; or the second spiral portion 1213 and the fourth spiral portion 1231 are in a symmetrical involute shape; or the second spiral portion 1213 and the fourth spiral portion 1231 have an asymmetric involute shape; or the second helix 1213 and/or the fourth helix 1231 are in the form of an archimedes helix.

Of course, each spiral part can also be distributed in an algebraic spiral line or a line-segment involute type or a mode of line type correction and the like.

Example seven:

on the basis of any of the above embodiments, as shown in fig. 6 to 11, the scroll compressor 100 is further defined to include: a motor assembly (not shown); and a crankshaft 160 connected to the motor assembly, wherein the crankshaft 160 is connected to the movable plate 121 through the first stationary plate 122 or the second stationary plate 123.

In this embodiment, the scroll compressor 100 further includes a motor assembly and a crankshaft 160, the motor assembly driving the crankshaft 160 to rotate and thereby rotate the movable disk 121. Since the movable plate 121 is located between the first fixed plate 122 and the second fixed plate 123, the crankshaft 160 can be connected to the movable plate 121 through the first fixed plate 122, in which case the first fixed plate 122 is located on the side of the movable plate 121 close to the motor assembly, or the crankshaft 160 can be connected to the movable plate 121 through the second fixed plate 123, in which case the second fixed plate 123 is located on the side of the movable plate 121 close to the motor assembly. Neither first stationary disk 122 nor second stationary disk 123 rotates with the rotation of crankshaft 160.

Further, the scroll compressor 100 also includes one or more support brackets (not shown) for supporting the first and second

stationary plates

122, 123. The scroll compressor 100 also includes a oldham ring (not shown) to prevent spinning.

In one particular embodiment, the scroll compressor 100 is a vertical compressor.

Example eight:

as shown in fig. 12, a refrigerating apparatus 200 includes: the scroll compressor 100 of any of the above embodiments. The refrigeration apparatus 200 provided by the present invention has the advantages of any one of the above technical solutions due to the scroll compressor 100 according to any one of the above technical solutions, which is not repeated herein.

In a particular embodiment, the refrigeration appliance 200 further comprises: a first condenser 210 in communication with the first discharge port 112 of the scroll compressor 100; a first throttling element 220 in communication with the first condenser 210; a first evaporator in communication with the first throttling element 220, the first evaporator also in communication with the suction port 111 of the scroll compressor 100; a second condenser 230 in communication with the second discharge port 113 of the scroll compressor 100; a second throttling element 240 in communication with the second condenser 230; and a second evaporator in communication with the second throttling element 240, the second evaporator also being in communication with the suction port 111 of the scroll compressor 100.

In this embodiment, the scroll compressor 100, the first condenser 210, the first throttling element 220, and the first evaporator form a first group of refrigeration system, the scroll compressor 100, the second condenser 230, the second throttling element 240, and the second evaporator form a second group of refrigeration system, and two groups of mutually independent refrigeration systems, that is, the refrigeration apparatus 200 realizes a multi-exhaust function realized by a plurality of scroll compressors 100 in the related art through one scroll compressor 100, thereby reducing the processing cost of the refrigeration apparatus 200, also reducing the occupied space of the refrigeration apparatus 200, and improving the convenience in installing the components in the refrigeration apparatus 200, because the exhaust pressures of two exhaust ports are different, the exhaust pressures reaching the first condenser 210 and the second condenser 230 are different, so that the refrigeration apparatus 200 has double condensing temperatures and double evaporating temperatures, which is beneficial to realize energy utilization steps, improving the energy efficiency of the refrigeration unit 200. Especially, in the case where the displacement volumes of the two discharge ports are different, the amounts of the refrigerants condensed by the first condenser 210 and the second condenser 230 are different, thereby further improving the energy efficiency of the refrigeration apparatus 200.

Further, the refrigeration apparatus 200 further includes: a first liquid storage tank and a second liquid storage tank, wherein the first evaporator is communicated with the air suction port 111 of the scroll compressor 100 through the first liquid storage tank, and the second evaporator is communicated with the air suction port 111 of the scroll compressor 100 through the second liquid storage tank; or a third accumulator, through which both the first and second evaporators communicate with the suction port 111 of the scroll compressor 100.

By providing a first accumulator between the first evaporator and the suction port 111 of the scroll compressor 100, a second accumulator is provided between the second evaporator and the suction port 111 of the scroll compressor 100; or a third accumulator may be provided between the two evaporators and the suction port 111 of the scroll compressor 100. By storing the liquid refrigerant in the liquid reservoir, it is possible to prevent a large amount of liquid from entering the scroll compressor 100 and impacting the scroll compressor 100, thereby preventing the effective operation of the scroll compressor 100 from being affected.

In another specific embodiment, as shown in fig. 12, the refrigeration apparatus 200 further includes: a first condenser 210 in communication with the first discharge port 112 of the scroll compressor 100; a first throttling element 220 in communication with the first condenser 210; a second condenser 230 in communication with the second discharge port 113 of the scroll compressor 100; a second throttling element 240 in communication with the second condenser 230; and a third evaporator 250 communicating with the first and

second throttling elements

220 and 240, the third evaporator 250 also communicating with the suction port 111 of the scroll compressor 100.

In this embodiment, by providing two condensers, the first condenser 210 is communicated with the first exhaust port 112 of the scroll compressor 100, the second condenser 230 is communicated with the second exhaust port 113 of the scroll compressor 100, and the exhaust pressures reaching the first condenser 210 and the second condenser 230 are different due to the first exhaust port 112 and the second exhaust port 113 used for exhausting gas with different pressures, so that the refrigeration apparatus 200 can have double condensation temperatures, which is beneficial to realizing cascade utilization of energy and improving energy efficiency of the refrigeration apparatus 200. Of course, the two condensers are respectively communicated with one evaporator through throttling elements, and the heat is absorbed through concentrated evaporation.

Further, the refrigeration apparatus 200 further includes: the third accumulator, the third evaporator 250, communicates with the suction port 111 of the scroll compressor 100 via the third accumulator.

Through set up the third reservoir between third evaporator 250 and scroll compressor 100's the port 111 of breathing in, through the liquid refrigerant of reservoir storage, can avoid a large amount of liquid to get into scroll compressor 100 and cause the impact to scroll compressor 100, influence scroll compressor 100's effective operation.

In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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

Claims

1. A scroll compressor, comprising:

a housing having a first exhaust port and a second exhaust port thereon;

the compression assembly comprises a movable disc, a first fixed disc and a second fixed disc, the movable disc is positioned between the first fixed disc and the second fixed disc, the movable disc is meshed with the first fixed disc to form a first compression cavity, and the movable disc is further meshed with the second fixed disc to form a second compression cavity;

wherein the first compression chamber is communicated with the first exhaust port, the second compression chamber is communicated with the second exhaust port, and the first exhaust port and the second exhaust port are used for discharging gases with different pressures.

2. The scroll compressor of claim 1,

the shell is further provided with an air suction port, and the first compression cavity and the second compression cavity are communicated with the air suction port.

3. The scroll compressor of claim 1,

the shell is also provided with two air suction ports, one of the two air suction ports is communicated with the first compression cavity, and the other air suction port is communicated with the second compression cavity.

4. The scroll compressor of any one of claims 1 to 3,

the movable disc comprises a first spiral part facing the first fixed disc and a second spiral part facing the second fixed disc, the first fixed disc is provided with a third spiral part, the second fixed disc is provided with a fourth spiral part, the first spiral part is meshed with the third spiral part, and the second spiral part is meshed with the fourth spiral part;

the first compression cavity comprises a first air suction cavity and a second air suction cavity; the second compression chamber comprises a third suction chamber and a fourth suction chamber;

the first air suction cavity is formed by enclosing the outer side wall of the first spiral part and the third spiral part and is positioned at the end part of the first spiral part positioned at the periphery;

the second air suction cavity is formed by enclosing the inner side wall of the first spiral part and the third spiral part and is positioned at the end part of the first spiral part at the periphery;

the third air suction cavity is formed by enclosing the outer side wall of the second spiral part and the fourth spiral part and is positioned at the end part of the second spiral part positioned at the periphery;

the fourth air suction cavity is formed by enclosing the inner side wall of the second spiral part and the fourth spiral part and is positioned at the end part of the second spiral part positioned at the periphery;

an exhaust pressure of the first exhaust port is less than an exhaust pressure of the second exhaust port;

the ratio of the suction volume of the first compression cavity to the suction volume of the second compression cavity ranges from 0.6 to 1.9;

the suction volume of the first compression cavity is the sum of the volume of the first suction cavity and the volume of the second suction cavity; and the suction volume of the second compression cavity is the sum of the volume of the third suction cavity and the volume of the fourth suction cavity.

5. The scroll compressor of claim 4,

the first spiral part and the third spiral part are in a symmetrical involute type; or

The first spiral part and the third spiral part are in an asymmetric involute type; or

The first helix and/or the third helix are of an archimedean spiral type; or

The second spiral part and the fourth spiral part are in a symmetrical involute type; or

The second spiral part and the fourth spiral part are in an asymmetric involute type; or

The second helix and/or the fourth helix are of an archimedean helix type.

6. The scroll compressor of claim 2 or 3,

the air suction port is communicated with the inner cavity of the shell;

the scroll compressor further comprises a first exhaust passage and a second exhaust passage which are independent of each other, the first compression cavity is communicated with the first exhaust passage, and the second compression cavity is communicated with the second exhaust passage.

7. The scroll compressor of claim 2 or 3,

the second compression chamber is communicated with the second exhaust port through the inner cavity of the shell;

the scroll compressor further comprises a suction passage and a first exhaust passage, the suction port is communicated with the suction passage, and the first compression cavity is communicated with the first exhaust passage through the first exhaust port.

8. The scroll compressor of claim 2 or 3,

the first compression chamber communicates with the first exhaust port via an inner chamber of the housing;

the scroll compressor further comprises a suction passage and a second discharge passage, the suction port is communicated with the suction passage, and the second compression cavity is communicated with the second discharge port through the second discharge passage.

9. The scroll compressor of any one of claims 1 to 3, further comprising:

a motor assembly;

and the crankshaft is connected with the motor assembly, and the crankshaft penetrates through the first static disc or the second static disc to be connected with the movable disc.

10. The scroll compressor of any one of claims 1 to 3,

the scroll compressor is a vertical compressor.

11. A refrigeration apparatus, comprising:

a scroll compressor as claimed in any one of claims 1 to 10.

12. The refrigeration appliance according to claim 11, further comprising:

a first condenser in communication with a first discharge port of the scroll compressor;

a first throttling element in communication with the first condenser;

a first evaporator in communication with the first throttling element, the first evaporator also in communication with a suction port of the scroll compressor;

a second condenser in communication with a second discharge port of the scroll compressor;

a second throttling element in communication with the second condenser;

a second evaporator in communication with the second throttling element, the second evaporator also in communication with a suction port of the scroll compressor.

13. The refrigeration appliance according to claim 12, further comprising:

the first evaporator is communicated with a suction port of the scroll compressor through the first liquid storage device, and the second evaporator is communicated with the suction port of the scroll compressor through the second liquid storage device; or

And the first evaporator and the second evaporator are communicated with a suction port of the scroll compressor through the third liquid storage device.

14. The refrigeration appliance according to claim 11, further comprising:

a first throttling element in communication with the first condenser;

a second throttling element in communication with the second condenser;

a third evaporator in communication with the first throttling element and the second throttling element, the third evaporator also in communication with a suction port of the scroll compressor.

15. The refrigeration appliance according to claim 14, further comprising:

and the third liquid storage device is communicated with a suction port of the scroll compressor through the third liquid storage device.