Motor structure, compressor and air conditioner

Abstract

The application relates to the technical field of air conditioners, and discloses a motor structure, a compressor and an air conditioner. The motor structure provided by the application comprises a shell, a containing cavity is formed in the interior of the shell, and a refrigerant flow channel is formed in the shell and communicates with the containing cavity; a motor rotor comprises a rotating shaft and a winding set on the rotating shaft, a first refrigerant passage is formed in the rotating shaft, and the inlet of the first refrigerant passage communicates with the refrigerant flow channel; a motor stator is arranged in the shell, the motor rotor penetrates through the motor stator, the winding set and the motor stator form a second refrigerant passage, and the outlet of the first refrigerant passage communicates with the inlet of the second refrigerant passage. The motor structure is characterized in that the first refrigerant passage and the second refrigerant passage are communicated, so that the refrigerant input into the motor can pass through the first refrigerant passage and the second refrigerant passage in sequence, the stroke of the refrigerant in the motor is increased, and the problem that the refrigerant in the motor causes damage to the compressor body is solved.

Description

Technical Field

[0001] This application belongs to the field of air conditioner technology, and particularly relates to motor structure, compressor and air conditioner. Background Technology

[0002] Screw compressors are prone to overheating and damage when operating under low load conditions. Typically, throttled refrigerant is introduced into the motor to cool it. However, the amount of refrigerant input into the motor is difficult to control precisely. When excessive refrigerant is input into the motor, the liquid refrigerant fails to evaporate completely and enters the compressor body, causing damage to the compressor.

[0003] Therefore, improvements to existing technologies are necessary.

[0004] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0005] This application provides a motor structure, a compressor, and an air conditioner to solve the problem that refrigerant inside the motor fails to evaporate completely and enters the compressor body, causing damage to the compressor body.

[0006] In a first aspect, embodiments of this application provide a motor structure, including: The housing has an internal cavity and a refrigerant flow channel communicating with the cavity. The motor rotor includes a shaft and windings disposed on the shaft. A first refrigerant channel is provided on the shaft, and the inlet of the first refrigerant channel is connected to the refrigerant flow channel. The motor stator is disposed inside the housing, the motor rotor passes through the motor stator, and a second refrigerant channel is formed between the winding and the motor stator. The outlet of the first refrigerant channel is connected to the inlet of the second refrigerant channel.

[0007] In one possible implementation, the motor rotor further includes a cooling component disposed within the first refrigerant channel. The cooling component has a first cooling channel formed therein. The outer wall of the cooling component and the inner wall of the first refrigerant channel together define a second cooling channel. The first cooling channel and the second cooling channel are in communication. The inlet of the first cooling channel is in communication with the refrigerant flow channel, and the outlet of the second cooling channel is in communication with the inlet of the second refrigerant channel.

[0008] In one possible implementation, the end of the cooling component that extends into the first refrigerant channel has a connecting port, and the first cooling channel is connected to the second cooling channel through the connecting port.

[0009] In one possible implementation, an end plate is provided on the side of the cooling component away from the bottom wall of the first refrigerant channel, and the end plate and the end side of the rotating shaft together define the outlet of the second cooling channel.

[0010] In one possible implementation, the housing is provided with a water-cooling cavity, a water-cooling inlet, and a water-cooling outlet, both of which are connected to the water-cooling cavity.

[0011] In one possible implementation, a refrigerant tank is recessed on the bottom side of the housing, the opening of the refrigerant tank is directly opposite the outlet of the first refrigerant channel, and a liquid level sensor is provided on the tank wall of the refrigerant tank.

[0012] Secondly, embodiments of this application also provide a compressor, the compressor including the motor structure as described in any of the preceding claims.

[0013] Thirdly, embodiments of this application also provide an air conditioner, which includes the compressor described above.

[0014] In one possible implementation, the air conditioner further includes an evaporator, a first throttling device, a second throttling device, a controller, and a condenser. The compressor, condenser, first throttling device, and evaporator are sequentially connected to form a circuit. The second throttling device is connected to the condenser and the casing. The controller is electrically connected to the second throttling device.

[0015] In one possible implementation, the air conditioner further includes an electric shut-off valve and a one-way valve, and the housing is provided with a water-cooled cavity, a water-cooled inlet and a water-cooled outlet, both of which are connected to the water-cooled cavity. The electric shut-off valve is connected to the chilled water outlet of the evaporator and the water-cooling inlet, and the one-way valve is connected to the water-cooling outlet and the chilled water inlet of the evaporator.

[0016] Compared with the prior art, this application has the following beneficial effects: The motor structure provided in this application provides a first refrigerant channel on the motor rotor and a second refrigerant channel between the windings and the motor stator. This allows the refrigerant injected into the motor to cool the motor rotor through the first refrigerant channel and the motor stator through the second refrigerant channel. By connecting the first and second refrigerant channels, the refrigerant input into the motor can pass through both channels sequentially, increasing the refrigerant's travel distance within the motor. This allows the liquid refrigerant to evaporate inside the motor, solving the problem of refrigerant failing to evaporate completely and entering the compressor body, thus damaging the compressor. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0019] Figure 1 This is a schematic diagram of the motor structure provided in an embodiment of this application.

[0020] Figure 2 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of this application.

[0021] In the diagram: 1. Housing; 11. Refrigerant tank; 12. Refrigerant tank; 13. Liquid level sensor; 14. Water-cooled chamber; 15. Water-cooled inlet; 16. Water-cooled outlet; 2. Motor rotor; 21. Shaft; 22. Winding; 23. First refrigerant passage; 24. Second refrigerant passage; 25. Cooling component; 26. First cooling passage; 27. Second cooling passage; 28. Connecting port; 29. ​​End plate; 3. Motor stator; 41. Compressor; 42. Condenser; 43. Evaporator; 44. First throttling device; 45. Second throttling device; 51. Electric shut-off valve; 52. Check valve. Detailed Implementation

[0022] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0023] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0024] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0025] This application provides a motor structure, a compressor, and an air conditioner to solve the problem that refrigerant inside the motor fails to evaporate completely and enters the compressor 41 body, causing damage to the compressor 41 body. The following description is in conjunction with the accompanying drawings.

[0026] Please see Figure 1 This application provides a motor structure including a housing 1, a motor rotor 2, and a motor stator 3. The housing 1 has an internal cavity 11 and a refrigerant channel communicating with the cavity 11. The motor rotor 2 includes a shaft 21 and a winding 22 disposed on the shaft 21. A first refrigerant channel 23 is disposed on the shaft 21, and the inlet of the first refrigerant channel 23 is communicating with the refrigerant channel. The motor stator 3 is disposed inside the housing 1, and the motor rotor 2 passes through the motor stator 3. A second refrigerant channel 24 is formed between the winding 22 and the motor stator 3, and the outlet of the first refrigerant channel 23 is communicating with the inlet of the second refrigerant channel 24.

[0027] By creating a first refrigerant channel 23 on the motor rotor 2 and forming a second refrigerant channel 24 between the winding 22 and the motor stator 3, the refrigerant injected into the motor can cool the motor rotor 2 through the first refrigerant channel 23 and cool the motor stator 3 through the second refrigerant channel 24. By connecting the first refrigerant channel 23 and the second refrigerant channel 24, the refrigerant input into the motor can pass through the first refrigerant channel 23 and the second refrigerant channel 24 in sequence, increasing the refrigerant's travel distance inside the motor. This allows the liquid refrigerant to evaporate inside the motor, solving the problem of refrigerant not evaporating completely and entering the compressor 41 body, causing damage to the compressor 41 body.

[0028] Please see Figure 1 The motor rotor 2 also includes a cooling component 25, which is disposed within a first refrigerant channel 23. A first cooling channel 26 is formed within the cooling component 25. The outer wall of the cooling component 25 and the inner wall of the first refrigerant channel 23 together define a second cooling channel 27. The first cooling channel 26 and the second cooling channel 27 are connected. The inlet of the first cooling channel 26 is connected to the refrigerant flow channel, and the outlet of the second cooling channel 27 is connected to the inlet of the second refrigerant channel 24. After the refrigerant flows in from the inlet of the first cooling channel 26, it can flow sequentially through the first cooling channel 26, the second cooling channel 27, and the second refrigerant channel 24. This not only facilitates the cooling of the motor rotor 2 and the motor stator 3 but also increases the travel distance of the refrigerant within the motor, thereby increasing the possibility of liquid refrigerant evaporation.

[0029] Please see Figure 1A connector is provided on the outer wall of the cooling component 25, connecting the outer wall of the cooling component 25 and the inner wall of the first refrigerant channel 23. In this embodiment, the number of connectors is set to three sets, which are spaced apart along the length of the cooling component 25. Each set of connectors includes multiple connectors, which are spaced apart sequentially along the circumference of the outer wall of the cooling component 25. A communication port 28 is provided at one end of the cooling component 25 that extends into the first refrigerant channel 23, through which the first cooling channel 26 communicates with the second cooling channel 27. An end plate 29 is provided on the side of the cooling component 25 away from the bottom wall of the first refrigerant channel 23. The end plate 29 and the end side of the rotating shaft 21 together define the outlet of the second cooling channel 27. The end plate 29 not only helps to define the outlet direction of the second cooling channel 27, but also helps to restrict the refrigerant from flowing into the second cooling channel 27 from the outlet.

[0030] Please see Figure 1 A refrigerant tank 12 is recessed on the bottom side of the housing 1. The opening of the refrigerant tank 12 is directly opposite the outlet of the first refrigerant channel 23. In this embodiment, the outlet of the second cooling channel 27 is directly opposite the opening of the refrigerant tank 12, so that the liquid refrigerant can flow into the refrigerant tank 12 under the action of gravity. This solves the problem that the refrigerant in the motor cannot be completely evaporated and enters the compressor 41 body, causing damage to the compressor 41 body. Moreover, the liquid refrigerant can continue to evaporate and absorb heat in the refrigerant tank 12, which is beneficial to improving the cooling effect of the motor. A liquid level sensor 13 is provided on the tank wall of the refrigerant tank 12. The liquid level sensor can detect the amount of refrigerant in the refrigerant tank 12. The liquid level sensor 13 is electrically connected to an external controller to facilitate the detection of the amount of refrigerant in the refrigerant tank 12.

[0031] Please see Figure 1 The housing 1 has a water-cooling cavity 14, a water-cooling inlet 15, and a water-cooling outlet 16, both of which are connected to the water-cooling cavity 14. When the refrigerant cannot cool the motor to the preset temperature, chilled water is injected into the water-cooling cavity 14 through the water-cooling inlet 15, which can further enhance the cooling capacity of the motor.

[0032] Please see Figure 2 This application embodiment also provides a compressor 41, which includes the motor structure described above. Since the compressor 41 has the above-described motor structure, it has at least some or all of the beneficial effects of the above-described motor structure, which will not be described in detail here.

[0033] Please see Figure 2This application embodiment also provides an air conditioner, which includes the compressor 41 as described above. The air conditioner also includes an evaporator 43, a first throttling device 44, a second throttling device 45, a controller, and a condenser 42. The compressor 41, condenser 42, first throttling device 44, and evaporator 43 are sequentially connected to form a circuit. The second throttling device 45 is connected to the condenser 42 and the casing 1. The controller is electrically connected to the second throttling device 45 and to a liquid level sensor, so that the controller controls the opening degree of the second throttling device 45 according to the refrigerant height in the refrigerant tank 12.

[0034] Please see Figure 2 The air conditioner also includes an electric shut-off valve 51 and a one-way valve 52. The electric shut-off valve 51 is connected to the chilled water outlet and the water-cooled inlet 15 of the evaporator 43, and the one-way valve 52 is connected to the water-cooled outlet 16 and the chilled water inlet of the evaporator 43. The electric shut-off valve 51 is electrically connected to the controller. When the opening of the second throttling device 45 reaches its maximum and the motor temperature has not yet dropped to the preset temperature, the controller controls the electric shut-off valve 51 to open, allowing chilled water to flow into the water-cooled chamber 14 to assist in cooling the motor, thereby reducing the occurrence of motor overheating. In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0035] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. An electric machine structure, characterized by include: The housing (1) has an internal cavity (11) and a refrigerant flow channel communicating with the cavity (11) on the housing (1). The motor rotor (2) includes a rotating shaft (21) and a winding (22) disposed on the rotating shaft (21). A first refrigerant channel (23) is provided on the rotating shaft (21), and the inlet of the first refrigerant channel (23) is connected to the refrigerant flow channel. The motor stator (3) is disposed inside the housing (1), the motor rotor (2) passes through the motor stator (3), the winding (22) and the motor stator (3) form a second refrigerant channel (24), and the outlet of the first refrigerant channel (23) is connected to the inlet of the second refrigerant channel (24).

2. The motor structure of claim 1, wherein The motor rotor (2) also includes a cooling component (25), which is disposed in the first refrigerant channel (23). A first cooling channel (26) is provided in the cooling component (25). The outer wall of the cooling component (25) and the inner wall of the first refrigerant channel (23) together define a second cooling channel (27). The first cooling channel (26) and the second cooling channel (27) are connected. The inlet of the first cooling channel (26) is connected to the refrigerant flow channel, and the outlet of the second cooling channel (27) is connected to the inlet of the second refrigerant channel (24).

3. The motor structure of claim 2, wherein The cooling component (25) has a connecting port (28) at one end that extends into the first refrigerant channel (23), and the first cooling channel (26) is connected to the second cooling channel (27) through the connecting port (28).

4. The motor structure of claim 2, wherein The cooling component (25) has an end plate (29) on the side away from the bottom wall of the first refrigerant channel (23), and the end plate (29) and the end side of the rotating shaft (21) together define the outlet of the second cooling channel (27).

5. The motor structure according to claim 1, characterized in that, The housing (1) is provided with a water-cooled cavity (14), a water-cooled inlet (15) and a water-cooled outlet (16), and the water-cooled inlet (15) and the water-cooled outlet (16) are both connected to the water-cooled cavity (14).

6. The motor structure of claim 1, wherein The bottom side of the housing (1) is recessed with a refrigerant tank (12), the opening of the refrigerant tank (12) is directly opposite to the outlet of the first refrigerant channel (23), and a liquid level sensor (13) is provided on the tank wall of the refrigerant tank (12).

7. A compressor (41) characterized by, The compressor (41) includes the motor structure as described in any one of claims 1-6.

8. An air conditioner characterized by comprising: The air conditioner includes the compressor (41) as described in claim 7.

9. The air conditioner of claim 8, wherein The air conditioner also includes an evaporator (43), a first throttling device (44), a second throttling device (45), a controller, and a condenser (42). The compressor (41), condenser (42), first throttling device (44), and evaporator (43) are connected in sequence to form a circuit. The second throttling device (45) is connected to the condenser (42) and the casing (1). The controller is electrically connected to the second throttling device (45).

10. The air conditioner of claim 9, wherein The air conditioner also includes an electric shut-off valve (51) and a one-way valve (52). The housing (1) is provided with a water-cooled cavity (14), a water-cooled inlet (15) and a water-cooled outlet (16). The water-cooled inlet (15) and the water-cooled outlet (16) are both connected to the water-cooled cavity (14). The electric shut-off valve (51) is connected to the chilled water outlet of the evaporator (43) and the water-cooled inlet (15), and the one-way valve (52) is connected to the water-cooled outlet (16) and the chilled water inlet of the evaporator (43).

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