Self-starting synchronous reluctance compressor and refrigeration system

Abstract

A self-starting synchronous reluctance compressor and a refrigeration equipment system are provided. The self-starting synchronous reluctance compressor includes a cylinder (6), a flange (24), a sound-absorbing cover (9), and a motor (5). The motor (5) includes a motor rotor (21). The flange (24) is in contact with the cylinder (6), and a sound-absorbing cover (9) is further provided on the flange (24). A sound-absorbing cavity is formed between the sound-absorbing cover (9) and the flange (24), and the sound-absorbing cover is provided with at least one exhaust port (10). The motor rotor (21) is provided with multiple layers of rotor slots (11), at least some of the rotor slots (11) axially penetrate the motor rotor (21), a total cross-sectional area of ​​the at least some of the rotor slots axially penetrating the motor rotor (21) is Sx, and a total cross-sectional area of ​​the exhaust port (10) is Ss, where Sx>Ss.

Description

[Technical field]

[0001] This application relates to the technical field of motors, and more particularly to self-starting synchronous reluctance compressors and refrigeration equipment systems.

[0002] This application claims priority to a Chinese patent application filed with the China Patent Office on January 26, 2022, bearing application number 202210092200.9 and entitled "Self-starting synchronous reluctance compressor and refrigeration equipment system," the entire contents of which are hereby incorporated by reference in their entirety. [Background technology]

[0003] A compressor for an air conditioner or a refrigerator has an intake pipe, an exhaust pipe and a housing, and a compression structure for compressing gas and a motor for driving the compression structure are provided in the housing. In order to ensure that the refrigerant and gas flow smoothly through the compressor, it is necessary to open slots or holes in the motor to ensure that the refrigerant and gas can pass through the motor. However, opening slots or holes in the motor will reduce the efficiency of the motor. Especially for a fixed-speed asynchronous compressor, since the rotor of the asynchronous motor has a large number of cage-shaped slots, the rotor does not have enough space to open slots or holes to increase the flow area of ​​the motor, so the efficiency of the motor and the area of ​​the slots or holes cannot be compatible. In addition, the rotation speed of the conventional asynchronous motor is not synchronous rotation speed, and the rotation speed is rather low, and the area of ​​the slots or holes in the motor affects the flow of gas and refrigerant in the compressor, and the refrigeration capacity of the compressor cannot be better exerted.

[0004] The compressor in the prior art has technical problems such as the refrigerant and gas flow is not smooth enough, which affects the energy efficiency of the compressor. Therefore, this application studies and designs a self-starting synchronous reluctance compressor and refrigeration equipment system. Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, the technical problem to be solved by the present application is to overcome the defect in the prior art that the flow of refrigerant and gas in the compressor is not smooth enough, which affects the energy efficiency of the compressor, and to provide a self-starting synchronous reluctance compressor and refrigeration equipment system. [Means for solving the problem]

[0006] In order to solve the above problem, the present application provides a self-starting synchronous reluctance compressor, comprising a cylinder, a flange, a sound-absorbing cover and a motor, the motor including a motor rotor. The flange is in contact with the cylinder, and the sound-absorbing cover is further provided on the flange. A sound-absorbing cavity is formed between the sound-absorbing cover and the flange, and the sound-absorbing cover is provided with at least one exhaust port. The motor rotor is provided with multiple layers of rotor slots, at least some of the rotor slots axially penetrate the motor rotor, and the at least some of the rotor slots axially penetrate the motor rotor are defined as rotor through slots, a total cross-sectional area of ​​the rotor through slots is Sx, a total cross-sectional area of ​​the exhaust ports is Ss, and Sx>Ss.

[0007] In some embodiments, the motor rotor has an axial hole, and the cross-sectional area of ​​the rotor slots gradually decreases from the center of the axial hole outwardly in the radial direction of the rotor.

[0008] In some embodiments, the cylinder has an inlet port, the total cross-sectional area of ​​the inlet port is Sg, where Sg≦Sx.

[0009] In some embodiments, the motor further includes a motor stator, the motor stator having a stator bore, the motor rotor located within the stator bore, air gap through slots formed between an inner wall of the stator bore and an outer periphery of the motor rotor, the air gap through slots having a total cross-sectional area Sq, where 1≦Sx / Sq.

[0010] In some embodiments, the motor further includes a housing, the motor located within the housing, the motor rotor having multiple layers of cage slots and cage end rings, and the motor further includes a motor stator having a groove or trimming on an outer periphery of the motor stator, and a stator through slot formed between the groove or trimming and an inner wall of the housing.

[0011] In some embodiments, the motor stator has a stator bore, the motor rotor is positioned within the stator bore, and an air gap through slot is formed between an inner wall of the stator bore and an outer periphery of the motor rotor.

[0012] The total flow area S of the motor is the sum of the total cross-sectional area Sd of the stator through slots, the total cross-sectional area Sx of the rotor through slots, and the total cross-sectional area Sq of the air gap through slots, and satisfies 0.2≦Sx / S≦0.6.

[0013] In some embodiments, the motor further includes an intake pipe and an exhaust pipe, the motor stator having a stator bore, the motor rotor positioned within the stator bore, and an air gap through slot formed between an inner wall of the stator bore and an outer periphery of the motor rotor.

[0014] The sum of the total cross-sectional area Sx of the rotor through slots and the total cross-sectional area Sq of the air gap through slots is greater than three times the cross-sectional area of ​​the intake pipe or the exhaust pipe.

[0015] In some embodiments, the motor rotor further comprises multiple layers of cage slots and cage end rings, air flows through the rotor slots in the multiple layers, the cage slots are distributed around the rotor slots in the same layer, and a conductive non-magnetic material is filled in the cage slots and short-circuited through the cage end rings.

[0016] In some embodiments, each of the multiple layers of rotor slots and the corresponding cage slot are separated by a dividing rib, the rotor slot forms a magnetic barrier layer together with the cage slots at both ends, and the magnetic barrier layer corresponding to one rotor pole has at least two layers.

[0017] In some embodiments, the ratio of the total cross-sectional area Sx of the rotor through slots to the total cross-sectional area Sz of the multiple layers of slit slots is greater than 0.4.

[0018] In some embodiments, 1.6≦Sx / Ss≦4.8.

[0019] In some embodiments, 1≦Sx / Sg≦3.

[0020] In some embodiments, the motor is a self-starting synchronous reluctance motor and the compressor is a constant speed compressor.

[0021] The present application further provides a refrigeration equipment system, comprising a compressor, a condenser, an evaporator and an expander, wherein the compressor is the self-starting synchronous reluctance compressor according to any one of the preceding embodiments. Effect of the Invention

[0022] The self-starting synchronous reluctance compressor and refrigeration system according to the present application has the following beneficial effects:

[0023] The present application provides a self-starting synchronous reluctance compressor, which includes a compression structure in the compressor and a motor for driving the compression structure, and the motor is a self-starting synchronous reluctance motor. The rotor slot of the motor rotor increases the flow area of ​​the motor, solving the problem that the flow of the refrigerant and gas in the compressor is not smooth enough, which affects the energy efficiency of the compressor, and improving the heat dissipation of the motor, thereby improving the efficiency and life of the motor. In addition, the motor operates synchronously, has a high rotation speed, and has a high refrigeration capacity. [Brief description of the drawings]

[0024] [Figure 1] FIG. 1 is an internal structural diagram of the self-starting synchronous reluctance compressor of the present application. [Diagram 2] 1 is a structural schematic diagram of a motor stator and a motor rotor according to the present application. [Diagram 3] FIG. 2 is a structural schematic diagram of a motor rotor according to the present application. [Figure 4] FIG. 1 is a curve showing the relationship between the ratio of the total cross-sectional area of ​​the motor rotor through slots of the present application to the total cross-sectional area of ​​the exhaust port, and the refrigeration capacity. [Diagram 5] FIG. 2 is a curve diagram showing the influence of the ratio of the total cross-sectional area of ​​the motor rotor through slots to the total cross-sectional area of ​​the air gap through slots of the present invention on the efficiency of a conventional asynchronous motor and the motor of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] As shown in Figs. 1-5, the present application provides a self-starting synchronous reluctance compressor, which includes a cylinder 6, a flange 24, a silencer cover 9, and a motor 5. The motor 5 includes a motor rotor 21, the flange 24 is in contact with the cylinder 6, the silencer cover 9 is further provided on the flange 24, a silencer cavity is formed between the silencer cover 9 and the flange 24, and the silencer cover 9 is provided with at least one exhaust port 10. The motor rotor is provided with multiple layers of rotor slots 11, and at least some of the multiple layers of rotor slots 11 penetrate the motor rotor in the axial direction. At least some of the rotor slots 11 that penetrate the motor rotor in the axial direction are defined as rotor through slots. The total cross-sectional area of ​​the rotor through slots is Sx, and the total cross-sectional area of ​​the exhaust port 10 is Ss, where Sx>Ss. In one embodiment, 1.6≦Sx / Ss≦4.8.

[0026] The present application provides a self-starting synchronous reluctance compressor, which includes a compression structure and a motor for driving the compression structure. The motor is a self-starting synchronous reluctance motor, and the rotor through-slots of the rotor are used to increase the flow area of ​​the motor, and the total cross-sectional area Sx of the rotor through-slots is greater than the total cross-sectional area Ss of the exhaust port of the muffler cavity. In addition, 1.6≦Sx / Ss≦4.8. When the above range conditions are met, the gas flow area can be increased and the flow smoothness can be improved, and the heat dissipation of the motor can be improved, and the area of ​​the rotor through-slots is not too large to affect the magnetic flux performance of the motor rotor itself, ensuring the operation efficiency of the motor, effectively solving the problem that the flow of the refrigerant and gas in the compressor is not smooth enough, which affects the energy efficiency of the compressor, and also improving the heat dissipation of the motor and improving the efficiency and life of the motor. In addition, the motor operates synchronously, has a high rotation speed, and has a high refrigeration capacity.

[0027] In some embodiments, the motor rotor has an axial hole 22, the flow area of ​​rotor slots 11 relatively close to the axial hole 22 is larger than the flow area of ​​rotor slots 11 relatively far from the axial hole 22, and the cross-sectional area of ​​the rotor slots 11 gradually decreases from the center of the axial hole to the outside in the radial direction of the rotor.

[0028] This application designs a self-starting synchronous reluctance compressor, which is illustrated in FIG. 1 as an embodiment. The compressor has an intake pipe 1, an exhaust pipe 2 and a housing 3, in which a compression structure 4 for compressing gas and a motor 5 for driving the compression structure are provided. The compression structure 4 has a double cylinder block (including an upper cylinder block 6a and a lower cylinder block 6b) and a cylinder cavity (including an upper cylinder cavity 7a and a lower cylinder cavity 7b). Gas enters the upper cylinder cavity 7a and the lower cylinder cavity 7b respectively through the intake port (including an upper intake port 8a and a lower intake port 8b) of the cylinder block, and the gas is compressed and discharged into the muffler cavity, and discharged into the housing through the exhaust port 10 of the muffler cavity. The motor rotor 21 has multiple layers of rotor slots 11, cage slots 12 and cage end rings 13, and some or all of the rotor slots 11 axially penetrate the motor rotor 21. The motor stator 21 has a groove or trimming on its outer periphery, and a stator through slot 14 is formed between the motor stator 21 and the inner wall of the housing. The rotor 21 is located in a stator bore having a number of slots, and an air gap through slot 15 is formed between the stator bore and the outer periphery of the rotor. The gas discharged from the muffler cavity passes through the rotor slot 11, the stator through slot 14, and the air gap through slot 15 to reach the upper cavity 16 of the housing, and is finally discharged from the exhaust pipe 2 and introduced into the condenser 17. The intake pipe 1 of the compressor is connected to the evaporator 18, and the evaporator 18 and the condenser 17 are connected to each other via an expansion device 19 to finally form a refrigeration circulation system.

[0029] In some embodiments, the motor includes a motor stator 20 and a motor rotor 21, and FIG. 2 is a structural schematic diagram of the motor stator and rotor, as shown in FIG. 2, the stator 20 has a groove or trimming on the outer periphery, and a stator through-slot 14 is formed between the stator 20 and the inner wall of the housing, the stator 20 has a plurality of stator slots 202 for accommodating windings 201 on the inside, and the rotor 21 has a plurality of rotor slots 11, a cage slot 12 and a cage end ring 13, and the rotor 21 is connected to a compression structure rotating shaft 23 through a shaft hole 22. Air flows through the rotor slots 11, and the cage slots 12 are distributed around the outer periphery of the rotor, and the cage slots 12 are filled with a conductive non-magnetic material and short-circuited through the cage end ring 13. FIG. 3 is a schematic diagram of the rotor structure. As shown in FIG. 3, the rotor slots 11 and the cage slots 12 of the rotor 21 are divided by dividing ribs 25, and the rotor slots 11 form magnetic barrier layers together with the cage slots 12 at both ends. There are at least two magnetic barrier layers corresponding to one rotor pole.

[0030] In some embodiments, the part or all of the rotor slots 11 axially penetrate the motor rotor 21, and the part or all of the rotor slots 11 axially penetrating the motor rotor are defined as rotor through-slots. The total cross-sectional area Sx of the rotor through-slots is greater than the total cross-sectional area Ss of the exhaust port of the muffler cavity. In addition, 1.6≦Sx / Ss≦4.8. In this way, not only can the gas flow area be increased and the flow smoothness be improved, but also the motor heat dissipation can be improved, and the cross-sectional area of ​​the rotor through-slots is not too large to affect the magnetic flux performance of the motor rotor itself, ensuring the operation efficiency of the motor, and effectively solving the problem that the flow of the refrigerant and gas in the compressor is not smooth enough, affecting the energy efficiency of the compressor.

[0031] In some embodiments, the cylinder 6 has an inlet 8. The total cross-sectional area of ​​the inlet 8 is Sg, and Sg≦Sx. In some embodiments, 1≦Sx / Sg≦3. The compression structure 4 of the present application has at least one cylinder block, the cylinder block has an inlet, and the total cross-sectional area Sg of the inlets of all the cylinder blocks is equal to or less than the total cross-sectional area Sx of the rotor through slots. In some embodiments, 1≦Sx / Sg≦3. If the total cross-sectional area of ​​the rotor through slots is sufficiently large, the resistance of the motor to the flow of gas and refrigerant can be reduced, the flow of gas and refrigerant is smooth, and the refrigeration capacity of the motor is improved. FIG. 4 is a curve diagram of the relationship between the flow area and the refrigeration capacity of the motor rotor of the present application, in which the ratio of the total cross-sectional area of ​​the rotor through slots increases, and when it increases to a certain extent, the refrigeration capacity tends to remain unchanged.

[0032] In some embodiments, the motor further includes a motor stator 20, the motor stator 20 having a stator bore, the motor rotor 21 located in the stator bore, an air gap through slot 15 formed between an inner wall of the stator bore and an outer periphery of the motor rotor 21, the total cross-sectional area of ​​the air gap through slot 15 being Sq, where 1≦Sx / Sq. As the rotor through slot is one of the main flow areas of the motor, the above structural dimensions can be limited to improve the heat dissipation rate of the motor rotor when the gas and refrigerant pass through the rotor through slot.

[0033] In some embodiments, the motor 5 further includes a housing 3, the motor is located inside the housing 3, the motor rotor 21 has multiple layers of rotor slots 11, cage slots 12 and cage end rings 13, and the motor 5 further includes a motor stator 20, the outer periphery of the motor stator has a groove or trimming, and a stator through slot 14 is formed between the groove or trimming and the inner wall of the housing.

[0034] In some embodiments, the motor stator 20 has a stator bore, the motor rotor 21 is located within the stator bore, and an air gap through slot 15 is formed between the inner wall of the stator bore and the outer periphery of the motor rotor 21.

[0035] The total flow area S of the motor is the sum of the total cross-sectional area Sd of the stator through slots 14, the total cross-sectional area Sx of the rotor through slots, and the total cross-sectional area Sq of the air gap through slots 15, and the ratio of the total cross-sectional area Sx of the rotor through slots to the total flow area S of the motor satisfies 0.20≦Sx / S≦0.6.

[0036] In the present application, the ratio of the total cross-sectional area Sx of the rotor through slots to the total flow area S of the motor (the sum of the total cross-sectional area Sd of the stator through slots, the total cross-sectional area Sx of the rotor through slots, and the total cross-sectional area Sq of the air gap through slots) satisfies 0.20≦Sx / S≦0.6. The appropriate total cross-sectional area of ​​the rotor through slots ensures the rationality of the flow area of ​​the motor, and some gas and refrigerant flow through the air gap through slots and the stator through slots with low flow resistance, and each component of the motor can dissipate heat.

[0037] In some embodiments, the motor further includes an intake pipe 1 and an exhaust pipe 2, the motor stator 20 having a stator bore, the motor rotor 21 being positioned within the stator bore, and an air gap through slot 15 being formed between the inner wall of the stator bore and the outer periphery of the motor rotor 21.

[0038] The sum of the total cross-sectional area Sx of the rotor through slots and the total cross-sectional area Sq of the air gap through slots is greater than three times the cross-sectional area of ​​the intake or exhaust pipe.

[0039] By satisfying the above-mentioned relationship between the total cross-sectional area of ​​the rotor through slots and the total cross-sectional area of ​​the trachea or exhaust pipe in the present application, under conditions that ensure motor performance, the larger the total cross-sectional area of ​​the rotor through slots, the better, and the effect of insufficient motor flow area on compressor performance can be reduced.

[0040] In some embodiments, the motor rotor 21 has multiple layers of rotor slots 11, squirrel cage slots 12 and squirrel cage end rings 13, air flows inside the rotor slots 11, the squirrel cage slots are distributed around the rotor slots 11 in the same layer, and a conductive non-magnetic material is filled in the squirrel cage slots and short-circuited through the squirrel cage end rings 13.

[0041] In some embodiments, the rotor slot 11 and the squirrel cage slot are divided by a dividing rib 25, the rotor slot forms a magnetic barrier layer together with the squirrel cage slots at both ends, and the magnetic barrier layer corresponding to one rotor pole is at least two layers. The rotor slot of the present application forms a magnetic barrier layer together with the squirrel cage slots at both ends, and the multiple layers of the magnetic barrier layer increase the reluctance torque of the motor and improve the efficiency of the motor.

[0042] In some embodiments, some or all of the rotor slots 11 axially penetrate the motor rotor, and some or all of the rotor slots 11 axially penetrating the motor rotor are defined as rotor through slots. The ratio of the total cross-sectional area Sx of the rotor through slots to the total cross-sectional area Sz of all the rotor slots 11 is greater than 0.4. In the present application, the ratio of the total cross-sectional area Sx of the rotor through slots to the total cross-sectional area Sz of the rotor slots 11 is greater than 0.4, thereby ensuring the flow area of ​​the motor.

[0043] In some embodiments, the motor is a self-starting synchronous reluctance motor, and the compressor is a constant speed compressor. The motor of the present application is a self-starting synchronous reluctance motor, and in order to generate reluctance torque and improve the efficiency of the motor, the rotor is provided with multiple layers of rotor slots, thereby increasing the flow area of ​​the motor, and the relationship between the cross-sectional area of ​​the rotor slots and the efficiency of the motor is low, which is different from the conventional asynchronous motor, and adding flow holes to the rotor of the conventional motor reduces the efficiency of the motor. Figure 5 shows the effect of the rotor flow area on the efficiency of the conventional asynchronous motor and the motor of the present application, and the larger the total cross-sectional area of ​​the rotor through-slots of the rotor of the conventional asynchronous motor, the lower the efficiency of the motor, whereas the motor of the present application has a large rotor flow area due to the structural characteristics of the rotor itself, excellent heat dissipation, and high motor efficiency. In some embodiments, the compressor is a constant speed compressor, and includes the structure of the compressor of the above embodiment.

[0044] The present application further provides a refrigeration equipment system, comprising a compressor, a condenser, an evaporator and an expander, the compressor being the self-starting synchronous reluctance compressor according to any one of the above embodiments, the refrigerant used in the compressor being at least one of HCFC refrigerant, HFC refrigerant, HC refrigerant and CH2F2 refrigerant.

[0045] The present application provides a self-starting synchronous reluctance compressor, which includes a compression structure in the compressor and a motor for driving the compression structure. The motor is a self-starting synchronous reluctance motor, and the rotor slot of the rotor is used to increase the flow area of ​​the motor, which solves the problem that the flow of refrigerant and gas in the compressor is not smooth enough, which affects the energy efficiency of the compressor, and improves the heat dissipation of the motor, thereby improving the efficiency and life of the motor.

[0046] The above is only a preferred embodiment of the present application, and does not limit the present application. Any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and principles of the present application are all within the scope of protection of the present application. Please note that the above is only a preferred embodiment of the present application, and those skilled in the art can make various improvements and modifications without departing from the technical principles of the present application, and these improvements and modifications are also considered to be within the scope of protection of the present application. [Explanation of symbols]

[0047] 1. Intake pipe 2. Exhaust pipe 3. Housing 4. Compression structure 5. Motor 6. Cylinder 6a, upper cylinder block 6b, lower cylinder block 7a, upper cylinder cavity 7b, lower cylinder cavity 8. Air intake 8a, upper air intake 8b, lower air intake 9. Sound-absorbing cover 10. Exhaust port 11. Rotor slot 12. Cage-shaped slot 13. Cage-shaped end ring 14, stator through slot 15, Air gap through slot 16. Upper housing cavity 17. Condenser 18. Evaporator 19. Expansion device 20. Motor stator 21. Motor rotor 201, winding wire 202. State slot 22, shaft hole 23. Rotation axis 24, flange 25, split rib

Claims

1. A self-starting synchronous reluctance compressor including a cylinder (6), a flange (24), a sound-deadening cover (9) and a motor (5), The motor (5) includes a motor rotor (21); The flange (24) is in contact with the cylinder (6), and the sound absorbing cover (9) is further provided on the flange (24); A sound absorbing cavity is formed between the sound absorbing cover (9) and the flange (24), and at least one exhaust port (10) is provided in the sound absorbing cover (9); The self-starting synchronous reluctance compressor is characterized in that the motor rotor (21) is provided with multiple layers of rotor slots (11), at least some of the rotor slots (11) axially penetrate the motor rotor, the at least some of the rotor slots (11) axially penetrating the motor rotor are defined as rotor through slots, a total cross-sectional area of ​​the rotor through slots is Sx, a total cross-sectional area of ​​the exhaust port (10) is Ss, and Sx>Ss.

2. The self-starting synchronous reluctance compressor according to claim 1, characterized in that the motor rotor (21) has an axial hole (22), and the cross-sectional area of ​​the rotor slot (11) gradually decreases from the center of the axial hole to the outside in the radial direction of the rotor (21).

3. 2. The self-starting synchronous reluctance compressor according to claim 1, characterized in that the cylinder (6) has an inlet (8), the total cross-sectional area of ​​the inlet (8) is Sg, and Sg≦Sx.

4. 2. The self-starting synchronous reluctance compressor according to claim 1, wherein the motor further comprises a motor stator (20), the motor stator (20) having a stator bore, the motor rotor (21) being located within the stator bore, an air gap through slot (15) being formed between an inner wall of the stator bore and an outer periphery of the motor rotor (21), the total cross-sectional area of ​​the air gap through slot (15) being Sq, where 1≦Sx / Sq.

5. The motor further includes a housing (3), the motor being located inside the housing (3); The motor rotor (21) has multiple layers of cage-shaped slots (12) and cage-shaped end rings (13), 2. The self-starting synchronous reluctance compressor according to claim 1, wherein the motor (5) further comprises a motor stator (20), the motor stator (20) having a groove or trimming on an outer periphery thereof, and a stator through slot (14) is formed between the groove or trimming and an inner wall of the housing.

6. The motor stator (20) has a stator bore, the motor rotor (21) is positioned within the stator bore, and an air gap through slot (15) is formed between an inner wall of the stator bore and an outer periphery of the motor rotor (21); 6. The self-starting synchronous reluctance compressor according to claim 5, wherein the total flow area S of the motor is the sum of the total cross-sectional area Sd of the stator through slots (14), the total cross-sectional area Sx of the rotor through slots (14), and the total cross-sectional area Sq of the air gap through slots (15), and satisfies 0.2≦Sx / S≦0.

6.

7. It further includes an intake pipe (1) and an exhaust pipe (2), The motor stator (20) has a stator bore, the motor rotor (21) is positioned within the stator bore, and an air gap through slot (15) is formed between an inner wall of the stator bore and an outer periphery of the motor rotor (21); 6. The self-starting synchronous reluctance compressor according to claim 5, wherein the sum of the total cross-sectional area Sx of the rotor through slots and the total cross-sectional area Sq of the air gap through slots is greater than three times the cross-sectional area of ​​the intake pipe or the exhaust pipe.

8. The motor rotor (21) further includes multiple layers of cage slots (12) and cage end rings (13); The self-starting synchronous reluctance compressor according to any one of claims 1 to 7, characterized in that air flows through the rotor slots (11) in the multiple layers, the cage slots are distributed on the outer periphery of the rotor slots (11) in the same layer, and the cage slots (12) are filled with a conductive non-magnetic material and short-circuited through the cage end rings (13).

9. 9. The self-starting synchronous reluctance compressor according to claim 8, characterized in that each of the layers of rotor slots (11) and the corresponding cage slots (12) are divided by a dividing rib (25), the rotor slots (11) form magnetic barrier layers together with the cage slots (12) at both ends thereof, and the magnetic barrier layers corresponding to one rotor pole are at least two layers.

10. The self-starting synchronous reluctance compressor according to claim 8, characterized in that the ratio of the total cross-sectional area Sx of the rotor through slots to the total cross-sectional area Sz of the multiple layers of slit slots (11) is greater than 0.

4.

11. 2. The self-starting synchronous reluctance compressor according to claim 1, characterized in that 1.6≦Sx / Ss≦4.

8.

12. 4. The self-starting synchronous reluctance compressor according to claim 3, wherein 1≦Sx / Sg≦3.

13. A self-starting synchronous reluctance compressor according to any one of claims 1 to 12, characterized in that the motor is a self-starting synchronous reluctance motor and the compressor is a constant speed compressor.

14. A refrigeration system including a compressor, a condenser, an evaporator and an expander, wherein the compressor is a self-starting synchronous reluctance compressor according to any one of claims 1 to 12.

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