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 bearing application number 202210092200.9 and entitled "Self-starting synchronous reluctance compressor and refrigeration equipment system," filed with the China Patent Office on January 26, 2022, the entire contents of which are hereby incorporated by reference. [Background technology]

[0003] Compressors for air conditioners and refrigerators have an intake pipe, an exhaust pipe, and a housing, which houses a compression structure for compressing gas and a motor for driving the compression structure. To ensure smooth flow of refrigerant and gas through the compressor, the motor must be slotted or perforated to allow the refrigerant and gas to pass through the motor. However, providing slots or perforations in the motor reduces motor efficiency. In particular, in the case of fixed-speed asynchronous compressors, the rotor of the asynchronous motor has multiple cage slots, which does not provide enough space for slots or perforations to increase the motor's flow area. This makes it difficult to achieve both motor efficiency and the required area for the slots or perforations. Furthermore, conventional asynchronous motors have a rotational speed that is not synchronous, resulting in a relatively low rotational speed. The area of ​​the slots or perforations in the motor affects the flow of gas and refrigerant through the compressor, hindering the compressor's refrigeration capacity.

[0004] The compressors in the prior art have technical problems such as the refrigerant and gas flow being 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 provide a self-starting synchronous reluctance compressor and refrigeration equipment system by overcoming 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. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides a cylinder, a flange, a sound-deadening cover, and a motor, the motor including a motor rotor. and rotating shaft (23) The present invention provides a self-starting synchronous reluctance compressor, comprising: Attached to the rotating shaft (23) The sound-deadening cover is further provided on the flange in contact with the cylinder. The sound absorbing cover (9) is located between the flange (24) and the motor rotor (21) in the axial direction, a sound-absorbing cavity is formed between the sound-absorbing cover and the flange, and at least one exhaust port is provided in the sound-absorbing cover; a plurality of layers of rotor slots are provided in the motor rotor, 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; the rotor through slots are provided for the passage of gas and refrigerant; The total cross-sectional area of ​​the rotor through slots is Sx and the total cross-sectional area of ​​the exhaust ports is Ss, where 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 outward in the radial direction of the rotor.

[0008] In some embodiments, the cylinder has an intake port, the total cross-sectional area of ​​the intake 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 positioned 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, a total cross-sectional area of ​​the air gap through slots being Sq, where 1≦Sx / Sq.

[0010] In some embodiments, the motor further includes a housing, the motor is located inside the housing, the motor rotor has multiple layers of cage slots and cage end rings, and the motor further includes a motor stator, the outer periphery of the motor stator has grooves or plane and the groove or plane and an inner wall of the housing, forming a stator through slot.

[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, and the multiple layers of rotor slots are provided inside the cage end rings. Gases and Refrigerants The squirrel cage slots are distributed around the rotor slots 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.

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

[0017] In some embodiments, the total cross-sectional area Sx of the rotor through slots and the plurality of layers rotor slot The ratio of the total cross-sectional area Sz to the total cross-sectional area Sz 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, including 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. [Effects of the Invention]

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

[0023] This 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. The rotor slots in the motor rotor increase the flow area of ​​the motor, solving the problem of insufficient flow of refrigerant and gas within the compressor, which affects the energy efficiency of the compressor, while improving heat dissipation of the motor and increasing the efficiency and lifespan of the motor. Furthermore, the motor operates synchronously, achieving high rotational speeds and high refrigeration capacity. [Brief explanation of the drawings]

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

[0025] As shown in FIGS. 1 to 5 , the present application provides a self-starting synchronous reluctance compressor, comprising 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 contacting the cylinder 6, the silencer cover 9 further provided on the flange 24, a silencer cavity formed between the silencer cover 9 and the flange 24, and at least one exhaust port 10 provided in the silencer cover 9. The motor rotor is provided with multiple layers of rotor slots 11, at least some of which axially penetrate the motor rotor. At least some of the rotor slots 11 axially penetrating the motor rotor 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 ports 10 is Ss, where Sx > Ss. In one embodiment, 1.6≦Sx / Ss≦4.8.

[0026] This 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 has through-slots in the rotor to increase the motor's flow area. The total cross-sectional area Sx of the rotor through-slots is greater than the total cross-sectional area Ss of the exhaust ports of the silencer cavity. Furthermore, the ratio Sx / Ss is 1.6≦Sx≦4.8. Meeting this range not only increases the gas flow area and improves flow smoothness, but also improves heat dissipation of the motor. The large area of ​​the through-slots does not affect the magnetic flux performance of the motor rotor itself, ensuring motor operating efficiency. This effectively solves the problem of insufficient flow of refrigerant and gas within the compressor, which affects compressor energy efficiency, and improves heat dissipation and extends the motor's efficiency and lifespan. Furthermore, the motor operates synchronously, achieving high rotational speeds and high refrigeration capacity.

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

[0028] This application describes a self-starting synchronous reluctance compressor, as illustrated in FIG. 1. The compressor includes an intake pipe 1, an exhaust pipe 2, and a housing 3. The housing 3 houses a compression structure 4 for compressing gas and a motor 5 for driving the compression structure. The compression structure 4 includes a double cylinder block (including an upper cylinder block 6a and a lower cylinder block 6b) and cylinder cavities (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 through the intake ports (including an upper intake port 8a and a lower intake port 8b) of the cylinder block. The gas is compressed and discharged into the silencer cavity, and then discharged into the housing through the silencer cavity exhaust port 10. The motor rotor 21 includes multiple layers of rotor slots 11, cage slots 12, and cage end rings 13. Some or all of the rotor slots 11 axially penetrate the motor rotor 21. Motor stator 20 The outer periphery of plane The compressor has a stator 21, with stator through slots 14 formed between it and the housing inner wall, and the rotor 21 is located in a stator inner hole having a plurality of slots, with air gap through slots 15 formed between the stator inner hole and the outer periphery of the rotor. Gas discharged from the silencer cavity passes through the rotor slots 11, the stator through slots 14, and the air gap through slots 15 to reach the housing upper cavity 16, and finally is discharged from the exhaust pipe 2 and introduced into the condenser 17. The compressor intake pipe 1 is connected to an evaporator 18, and an expander 19 connects the evaporator 18 and the condenser 17 to finally form a refrigeration circulation system.

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

[0030] In some embodiments, some or all of the rotor slots 11 axially penetrate the motor rotor 21, and 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 ports of the silencer cavities. Furthermore, 1.6≦Sx / Ss≦4.8. This not only increases the gas flow area and improves flow smoothness, but also improves motor heat dissipation. The rotor through-slots' excessively large cross-sectional area does not affect the magnetic flux performance of the motor rotor itself, ensuring motor operating efficiency. This effectively solves the problem of insufficient flow of refrigerant and gas in the compressor, which affects compressor energy efficiency.

[0031] In some embodiments, the cylinder 6 has an intake port 8. The total cross-sectional area of ​​the intake port 8 is Sg, where Sg≦Sx. In some embodiments, 1≦Sx / Sg≦3. The compression structure 4 of the present application has at least one cylinder block, each having an intake port, and the total cross-sectional area Sg of the intake ports of all cylinder blocks is less than or equal to the total cross-sectional area Sx of the rotor through-slots. In some embodiments, 1≦Sx / Sg≦3. A sufficiently large total cross-sectional area of ​​the rotor through-slots can reduce the resistance of the motor to the flow of gas and refrigerant, allowing for smooth flow of gas and refrigerant and improving the refrigeration capacity of the motor. Figure 4 shows a curve illustrating the relationship between the flow area and refrigeration capacity of the motor rotor of the present application. As the ratio of the total cross-sectional area of ​​the rotor through-slots increases, the refrigeration capacity of the compressor increases. After a certain increase, 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 positioned within the stator bore, air gap slots 15 formed between the inner wall of the stator bore and the outer periphery of the motor rotor 21, the total cross-sectional area of ​​the air gap slots 15 being Sq, where 1≦Sx / Sq. As the rotor slots are one of the main flow areas of the motor, limiting the above structural dimensions can improve the heat dissipation rate of the motor rotor when gas and refrigerant pass through the rotor slots.

[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, squirrel cage slots 12 and squirrel cage end rings 13, and the motor 5 further includes a motor stator 20, the outer periphery of the motor stator has grooves or plane and the groove or plane and the inner wall of the housing, a stator through slot 14 is formed.

[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. By using an appropriate total cross-sectional area of ​​the rotor through slots, the flow area of ​​the motor is ensured to be reasonable, and some gases and refrigerants can flow through the air gap through slots and stator through slots, reducing flow resistance and enabling heat dissipation for all components of the motor.

[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 pipe or exhaust pipe.

[0039] The total cross-sectional area of ​​the rotor through slots of the present invention and Sucking By satisfying the above relationship with the total cross-sectional area of ​​the trachea or exhaust pipe, under conditions that ensure motor performance, the larger the total cross-sectional area of ​​the rotor through-slots, the better, and the impact 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, cage slots 12, and cage end rings 13, and the rotor slots 11 are Gases and Refrigerants 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 separated by a dividing rib 25, the rotor slot forms a magnetic barrier layer together with the squirrel-cage slots on both ends, and the magnetic barrier layer corresponding to one rotor pole has at least two layers. The rotor slot of the present application forms a magnetic barrier layer together with the squirrel-cage slots on both ends, and the multiple magnetic barrier layers 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, by making 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 greater than 0.4, the flow area of ​​the motor can be secured.

[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. To generate reluctance torque and improve motor efficiency, the rotor is provided with multiple layers of rotor slots, thereby increasing the motor's flow area. Unlike conventional asynchronous motors, the low correlation between the cross-sectional area of ​​the rotor slots and motor efficiency results in a decrease in motor efficiency when additional flow holes are added to the rotor of a conventional motor. Figure 5 shows the effect of rotor flow area on the efficiency of a conventional asynchronous motor and the motor of the present application. While the conventional asynchronous motor's efficiency decreases as the total cross-sectional area of ​​the rotor through-slots increases, the motor of the present application has a large rotor flow area due to the structural characteristics of the rotor itself, resulting in excellent heat dissipation and high motor efficiency. In some embodiments, the compressor is a constant-speed compressor, and includes the compressor structure of the above-described embodiment.

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

[0045] This 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 slots of the rotor increase the flow area of ​​the motor, solving the problem of insufficient flow of refrigerant and gas in the compressor, which affects the energy efficiency of the compressor, and improving heat dissipation of the motor, thereby improving the efficiency and lifespan of the motor.

[0046] The above is merely a preferred embodiment of the present application and is not intended to limit the present application, and 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 merely 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 intake 8b, lower air intake 9. Silencer 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. Expander 20. Motor stator 21. Motor rotor 201, winding 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 silencer cover (9) and a motor (5), The motor (5) includes a motor rotor (21) and a rotating shaft (23); The flange (24) is attached to the rotating shaft (23) and is in contact with the cylinder (6), and the noise absorbing cover (9) is further provided on the flange (24), and the noise absorbing cover (9) is located between the flange (24) and the motor rotor (21) in the axial direction. 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); a motor rotor (21) having a plurality of layers of rotor slots (11), at least some of the rotor slots (11) penetrating the motor rotor in the axial direction, the at least some of the rotor slots (11) penetrating the motor rotor in the axial direction being defined as rotor through-slots, the rotor through-slots being provided for the passage of gas and refrigerant, a total cross-sectional area of ​​the rotor through-slots being Sx, a total cross-sectional area of ​​the exhaust port (10) being Ss, and Sx > Ss.

2. 2. The self-starting synchronous reluctance compressor according to claim 1, wherein 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 motor rotor (21).

3. 2. The self-starting synchronous reluctance compressor according to claim 1, wherein 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 in 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, and 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 a flat surface on its outer periphery, and a stator through-slot (14) formed between the groove or flat surface and the 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 or equal to three times the cross-sectional area of ​​the intake pipe or the exhaust pipe.

8. The motor rotor (21) further comprises multiple layers of cage slots (12) and cage end rings (13); 8. The self-starting synchronous reluctance compressor according to claim 1, wherein gas and refrigerant flow through the rotor slots (11) in the plurality of layers, the squirrel-cage slots are distributed around the rotor slots (11) in the same layer, and the squirrel-cage slots (12) are filled with a conductive non-magnetic material and short-circuited via the squirrel-cage end rings (13).

9. 9. The self-starting synchronous reluctance compressor according to claim 8, wherein each of the rotor slots (11) in the plurality of layers is divided from the corresponding cage slot (12) by a dividing rib (25), and the rotor slot (11) forms a magnetic barrier layer together with the cage slots (12) at both ends thereof, and the magnetic barrier layer corresponding to one rotor pole has 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 rotor slots (11) is greater than 0.

4.

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

8.

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

13. 13. The self-starting synchronous reluctance compressor according to any one of claims 1 to 7 and 11 to 12, wherein 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 7 and 11 to 12.

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