An assembly facilitating oil return for a compressor, a compressor and an air conditioner

Abstract

The application relates to an assembly facilitating compressor oil return, a compressor and an air conditioner, and belongs to the technical field of air conditioners, and solves the technical problem of slow oil return of an existing turbine compressor. The assembly comprises a motor stator, a motor rotor and a crankshaft, the motor rotor is rotatably installed in the motor stator, the crankshaft is provided with a matching section, the matching section is matched with the motor rotor, the motor rotor and / or the crankshaft is provided with a driven flow guide channel, when the motor rotor drives the crankshaft to rotate, the driven flow guide channel transports the gas in the space below the motor to the space above the motor, so as to form a negative pressure in the space below the motor, thereby sucking the refrigeration oil in the space above the motor downwards, and enabling the refrigeration oil in the space above the motor to flow to the space below the motor more smoothly. The compressor comprises the above assembly, and the air conditioner comprises the above compressor. Therefore, the oil return efficiency of the compressor is higher, the refrigerant oil carrying rate is lower, and the operation stability of the compressor and the air conditioner is higher.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of air conditioners, in particular to a component facilitating compressor oil return, a compressor and an air conditioner. BACKGROUND

[0002] At present, the motor (specifically, the motor stator and the motor rotor of the motor) of the turbo compressor is provided with an oil pool below the motor for storing refrigeration oil, and the refrigeration oil in the oil pool is pumped by an oil pump to supply refrigeration oil to the pump body. Compressor oil return refers to the refrigeration oil flowing from above the motor to the space below the motor and finally returning to the oil pool under the action of gravity through the flow-through hole in the motor rotor and the flow channel around the motor stator. However, when the compressor is running, gas will accumulate in the space below the motor, and the gas needs to flow to the space above the motor through the flow-through hole and the flow channel around the motor stator. Therefore, at the periphery of the motor, the refrigeration oil flow path and the gas flow path conflict, so that the refrigeration oil above the motor cannot easily flow to the space below the motor, thereby causing some refrigeration oil to accumulate above the motor, and as the motor frequency increases, more and more refrigeration oil accumulates above the motor, thereby causing the technical problem of slow oil return of the turbo compressor.

[0003] When too much refrigeration oil accumulates above the motor, it will cause insufficient refrigeration oil in the oil pool below, the oil level in the oil pool will decrease, the oil pump will not pump enough oil, and the pump body will not be sufficiently lubricated, thereby reducing the reliability of the compressor. Secondly, a large amount of refrigeration oil accumulated between the gas outlet and the motor will be discharged together with the refrigerant, increasing the oil-carrying rate, causing insufficient refrigeration oil in the compressor, also reducing the oil level in the oil pool, and thereby reducing the reliability of the compressor. At the same time, the refrigeration oil carried out will make the refrigerant mass flow of the compressor smaller, causing the refrigeration capacity of the compressor to decrease. SUMMARY

[0004] The present application provides a component facilitating compressor oil return, a compressor and an air conditioner to solve the technical problem of slow oil return of the existing turbo compressor.

[0005] The present application is implemented by the following technical scheme: a component facilitating compressor oil return, comprising a motor stator, a motor rotor and a crankshaft, the motor rotor is rotatably installed in the motor stator, the crankshaft has a matching section, the matching section cooperates with the motor rotor, the motor rotor and / or the crankshaft is provided with a driven flow channel, when the motor rotor drives the crankshaft to rotate, the driven flow channel transports the gas in the space below the motor to the space above the motor.

[0006] Further, in order to better realize the present application, the active flow guide channel is a first spiral channel opened on the outer wall of the matching section of the crankshaft, and the first spiral channel communicates the space above the motor and the space below the motor.

[0007] Further, in order to better realize the present application, the active flow guide channel is a second spiral channel opened on the outer wall of the motor rotor, and the second spiral channel communicates the space above the motor and the space below the motor.

[0008] Further, in order to better realize the present application, the active flow guide channel is a third spiral channel opened in the motor rotor, and the third spiral channel communicates the space above the motor and the space below the motor.

[0009] Further, in order to better realize the present application, the active flow guide channel is a first spiral channel opened on the outer wall of the matching section of the crankshaft and a second spiral channel opened on the outer wall of the motor rotor, and the first spiral channel and the second spiral channel both communicate the space above the motor and the space below the motor.

[0010] Further, in order to better realize the present application, the active flow guide channel is a first spiral channel opened on the outer wall of the matching section of the crankshaft and a third spiral channel opened in the motor rotor, and the first spiral channel and the third spiral channel both communicate the space above the motor and the space below the motor.

[0011] Further, in order to better realize the present application, the active flow guide channel is a second spiral channel opened on the outer wall of the motor rotor and a third spiral channel opened in the motor rotor, and the second spiral channel and the third spiral channel both communicate the space above the motor and the space below the motor.

[0012] Further, in order to better realize the present application, the active flow guide channel is a first spiral channel opened on the outer wall of the matching section of the crankshaft, a second spiral channel opened on the outer wall of the motor rotor, and a third spiral channel opened in the motor rotor, and the first spiral channel, the second spiral channel, and the third spiral channel all communicate the space above the motor and the space below the motor.

[0013] The present application also provides a compressor comprising the above-mentioned component facilitating oil return of the compressor.

[0014] The present application also provides an air conditioner comprising the above-mentioned compressor.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] (1) The assembly for facilitating compressor oil return provided by the present application comprises a motor stator, a motor rotor and a crankshaft, the motor rotor is rotatably installed in the motor stator, the crankshaft has a matching section which matches with the motor rotor, and a driving flow channel is arranged on the motor rotor and / or the crankshaft, when the motor rotor drives the crankshaft to rotate, the driving flow channel transports the gas in the space below the motor to the space above the motor, so as to form a negative pressure in the space below the motor, under the action of the negative pressure, the refrigerant in the space above the motor is sucked to the space below the motor through the flow channel around the motor stator and finally flows back to the oil pool below the motor, thereby accelerating the compressor oil return.

[0017] (2) The compressor provided by the present application comprises the above-mentioned assembly for facilitating compressor oil return, so that too much refrigerant oil does not stay in the space above the motor in the compressor, the oil return efficiency of the compressor is higher, the refrigerant oil amount in the oil pool is ensured, so that the oil pump can pump sufficient refrigerant oil into the pump body, so that the compressor operates more reliably, and since less refrigerant oil stays above the motor, the oil content in the refrigerant discharged from the exhaust port of the compressor is less, the refrigerant oil carrying rate is reduced, and the stability of the compressor operation is improved.

[0018] (3) The air conditioner provided by the present application comprises the above-mentioned compressor, so that the operation of the air conditioner is more reliable and stable. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0020] Figure 1 is a structural schematic view of the assembly for facilitating compressor oil return provided by the embodiment of the present application,

[0021] Figure 2 is a front view structural schematic view of the motor rotor in the embodiment of the present application,

[0022] Figure 3 is a sectional view of the motor rotor shown in the figure, Figure 2

[0023] Figure 4 is a structural schematic view of the crankshaft in the embodiment of the present application.

[0024] In the figure:

[0025] 1-motor stator, 11-flow channel,​

[0026] 2 - motor rotor, 21 - second spiral channel, 22 - third spiral channel,

[0027] 3 - crankshaft, 31 - first spiral channel. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described below in detail. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0029] Embodiment 1:

[0030] The assembly facilitating oil return of the compressor provided in the embodiment includes a motor stator 1, a motor rotor 2 and a crankshaft 3. A gap around the motor stator 1 forms a stator peripheral flow channel 11. The motor rotor 2 is rotatably installed in the motor stator 1. The crankshaft 3 has a matching section (not labeled in the figure). The matching section is matched (for example, keying matched) with the motor rotor 2. A driving flow channel is arranged on the motor rotor 2 and / or the crankshaft 3. When the motor rotor drives the crankshaft 3 to rotate, the driving flow channel transports the gas in the space below the motor to the space above the motor. It should be noted that the space below the motor refers to the space below the motor stator 1 and the motor rotor 2, and the space above the motor refers to the space above the motor stator 1 and the motor rotor 2. The motor refers to the motor inside the compressor.

[0031] With the aid of the assembly, when the motor in the compressor is running, the active flow channel will transport the gas in the space below the motor to the space above the motor, so as to reduce the pressure in the space below the motor, and even to form a negative pressure in the space below the motor, under the action of which the refrigeration oil in the space above the motor will be sucked to the space below the motor through the flow channel 11 around the motor stator 1, so as to reduce the amount of refrigeration oil remaining in the space above the motor. It is easy to understand that, based on the suction effect of the above-mentioned negative pressure, the refrigeration oil not only flows downward under the action of its own gravity, but also flows downward under the action of the suction force below. More importantly, in the present embodiment, the above-mentioned active flow channel serves as the upward discharge channel of the gas in the space below the motor, and the flow channel 11 around the motor stator 1 serves as the downward flow channel of the refrigeration oil above the motor, so that the upward discharge channel of the gas and the downward flow channel of the refrigeration oil are separated, and the upward discharge gas and the downward flow oil flow in different channels without interference, so that the refrigeration oil in the space above the motor in the compressor will flow more easily to the space below the motor and finally flow back to the oil pool, so as to facilitate the oil return of the compressor.

[0032] It should be noted that the refrigeration oil flowing through the flow channel 11 around the motor stator 1 to the space below the motor directly falls to the oil pool below the motor under the action of gravity, so that the refrigeration oil in the space below the motor will not be transported back to the space above the motor through the above-mentioned active flow channel when the motor in the compressor is running.

[0033] Embodiment 2:

[0034] The present embodiment is a specific implementation of embodiment 1, in which the above-mentioned active flow channel is a first spiral channel 31 formed on the matching section of the above-mentioned crankshaft 3, which communicates the above-mentioned space above the motor and the space below the motor.

[0035] When the motor in the compressor is running, the motor rotor 2 drives the crankshaft 3 to rotate, and the first helical channel 31 on the crankshaft 3 generates rotation. The gas in the space below the motor enters the first helical channel 31 from below. The first helical channel 31 not only applies a rotating force to the gas entering it, but also applies an upward force to the gas entering it, thereby driving the gas entering it to move upward into the space above the motor. Even if the refrigerant oil in the space above the motor enters the first helical channel 31 from above, the first helical channel 31 will apply an upward force to the refrigerant oil entering it, causing the refrigerant oil to flow to the space above the motor. Therefore, when the motor is running, the gas in the space below the motor is actively discharged from the first helical channel 31, causing the space below the motor to form a negative pressure that sucks the refrigerant oil in the space above the motor downward, causing the refrigerant oil in the space above the motor to more easily flow downward from the flow channel 11 around the periphery of the motor stator 1 to the space below the motor.

[0036] Furthermore, the negative pressure formed in the space below the motor by the first helical channel 31 is positively fed back to the rotational speed of the motor, that is, the higher the rotational speed of the motor, the greater the negative pressure formed in the space below the motor, and the refrigerant oil in the space above the motor can more easily reach the space below the motor.

[0037] Embodiment 3:

[0038] This embodiment is another specific embodiment of Embodiment 1. In this embodiment, the active flow guide channel is a second helical channel 21 formed on the outer wall of the motor rotor 2, which communicates the space above the motor and the space below the motor.

[0039] When the motor in the compressor is running, the motor rotor 2 rotates in the motor stator 1, and the second helical channel 21 on the motor rotor 2 generates rotation. The gas in the space below the motor enters the second helical channel 21 from below. The second helical channel 21 not only applies a rotating force to the gas entering it, but also applies an upward force to the gas entering it, thereby driving the gas entering it to move upward into the space above the motor. Even if the refrigerant oil in the space above the motor enters the second helical channel 21 from above, the second helical channel 21 will apply an upward force to the refrigerant oil entering it, causing the refrigerant oil to flow to the space above the motor. Therefore, when the motor is running, the gas in the space below the motor is actively discharged from the second helical channel 21, causing the space below the motor to form a negative pressure that sucks the refrigerant oil in the space above the motor downward, causing the refrigerant oil in the space above the motor to more easily flow downward from the flow channel 11 around the periphery of the motor stator 1 to the space below the motor.

[0040] Moreover, the negative pressure formed in the space below the motor through the second spiral passage 21 is positively fed back with the rotating speed of the motor, that is, the higher the rotating speed of the motor, the greater the negative pressure formed in the space below the motor, and the refrigerating oil in the space above the motor can more easily reach the space below the motor.

[0041] Embodiment 4:

[0042] The third spiral passage 22 in the motor rotor 2 is actually a through-flow port in the rotor of the existing motor, but the axial direction of the through-flow port in the rotor of the existing motor is the same as the axial direction of the rotor, while the third spiral passage 22 in the present embodiment is spirally arranged in the motor rotor 2. In the present embodiment, the number of the third spiral passages 22 in the motor rotor 2 is 3-6, for example, 3, 4, 5 or 6.

[0043] When the motor in the compressor is running, the motor rotor 2 rotates in the motor stator 1, and the third spiral passage 22 on the motor rotor 2 rotates. The gas in the space below the motor enters the third spiral passage 22 from below, and the third spiral passage 22 not only applies a rotating force to the gas entering it, but also applies an upward force to the gas entering it, thereby driving the gas entering it to move upward and enter the space above the motor. Even if the refrigerating oil in the space above the motor enters the third spiral passage 22 from above, the third spiral passage 22 will apply an upward force to the refrigerating oil entering it to make the refrigerating oil flow to the space above the motor. Therefore, when the motor is running, the gas in the space below the motor is actively discharged from the third spiral passage 22, so that a negative pressure is formed in the space below the motor, which sucks the refrigerating oil in the space above the motor downward, so that the refrigerating oil in the space above the motor more easily flows down from the flow channel 11 around the motor stator 1 to the space below the motor.

[0044] Moreover, the negative pressure formed in the space below the motor through the third spiral passage 22 is positively fed back with the rotating speed of the motor, that is, the higher the rotating speed of the motor, the greater the negative pressure formed in the space below the motor, and the refrigerating oil in the space above the motor can more easily reach the space below the motor.

[0045] Embodiment 5:

[0046] As a specific implementation of the embodiment 1, in the embodiment, the active flow guide channel is a first spiral channel 31 formed on the outer wall of the matching section of the crankshaft 3 and a second spiral channel 21 formed on the outer wall of the motor rotor 2, and the first spiral channel 31 and the second spiral channel 21 are both connected to the space above the motor and the space below the motor.

[0047] In this way, when the motor in the compressor is running, the motor rotor 2 drives the crankshaft 3 to rotate synchronously, and the first spiral channel 31 and the second spiral channel 21 can both transport the gas in the space below the motor to the space above the motor. Therefore, the first spiral channel 31 and the second spiral channel 21 in the embodiment are both updraft channels of the gas below the motor, and the first spiral channel 31 and the second spiral channel 21 can discharge more gas upward per unit time, so as to form a stronger negative pressure in the space below the motor, and thus it is more convenient for the refrigeration oil in the space above the motor to flow to the space below the motor, so as to facilitate the oil return of the compressor.

[0048] Embodiment 6

[0049] As a specific implementation of the embodiment 1, in the embodiment, the active flow guide channel is a first spiral channel 31 formed on the outer wall of the matching section of the crankshaft 3 and a third spiral channel 22 formed in the motor rotor 2, and the first spiral channel 31 and the third spiral channel 22 are both connected to the space above the motor and the space below the motor. It should be noted that the third spiral channel 22 is actually a through-flow opening formed in the rotor of the existing motor, but the third spiral channel 22 in the embodiment is spirally arranged in the motor rotor 2. In the embodiment, the number of the third spiral channels 22 in the motor rotor 2 is 3-6, such as 3, 4, 5 or 6.

[0050] In this way, when the motor in the compressor is running, the motor rotor 2 drives the crankshaft 3 to rotate synchronously, and the first spiral channel 31 and the third spiral channel 22 can both transport the gas in the space below the motor to the space above the motor. Therefore, the first spiral channel 31 and the third spiral channel 22 in the embodiment are both updraft channels of the gas below the motor, and the first spiral channel 31 and the third spiral channel 22 can discharge more gas upward per unit time, so as to form a stronger negative pressure in the space below the motor, and thus it is more convenient for the refrigeration oil in the space above the motor to flow to the space below the motor, so as to facilitate the oil return of the compressor.

[0051] Embodiment 7

[0052] As another specific embodiment of the embodiment 1, in the present embodiment, the active flow guide channels are the second spiral channels 21 formed on the outer wall of the motor rotor 2 and the third spiral channels 22 formed inside the motor rotor 2, and the second spiral channels 21 and the third spiral channels 22 both communicate the space above the motor and the space below the motor. It should be noted that the third spiral channels 22 are actually the flow-through openings formed inside the rotor of the existing motor of this type, except that the axial direction of the flow-through openings formed inside the rotor of the existing motor of this type is the same as the axial direction of the rotor, while the third spiral channels 22 in the present embodiment are spirally arranged inside the motor rotor 2. In the present embodiment, the number of the third spiral channels 22 inside the motor rotor 2 is 3-6, such as 3, 4, 5 or 6.

[0053] In this way, when the motor in the compressor is running, the motor rotor 2 rotates in the motor stator 1, and the second spiral channels 21 and the third spiral channels 22 can both transport the gas in the space below the motor to the space above the motor. Therefore, the second spiral channels 21 and the third spiral channels 22 in the present embodiment are both the upward discharge channels of the gas below the motor, and the second spiral channels 21 and the third spiral channels 22 can discharge more gas upward per unit time, so as to form a stronger negative pressure in the space below the motor, and thus more conveniently flow the refrigeration oil in the space above the motor to the space below the motor, so as to more conveniently return the oil of the compressor.

[0054] Embodiment 8:

[0055] As a best embodiment of the embodiment 1, in the present embodiment, the active flow guide channels are the first spiral channels 31 formed on the outer wall of the matching section of the crankshaft 3, the second spiral channels 21 formed on the outer wall of the motor rotor 2, and the third spiral channels 22 formed inside the motor rotor 2, and the first spiral channels 31, the second spiral channels 21 and the third spiral channels 22 all communicate the space above the motor and the space below the motor. It should be noted that the third spiral channels 22 are actually the flow-through openings formed inside the rotor of the existing motor of this type, except that the axial direction of the flow-through openings formed inside the rotor of the existing motor of this type is the same as the axial direction of the rotor, while the third spiral channels 22 in the present embodiment are spirally arranged inside the motor rotor 2. In the present embodiment, the number of the third spiral channels 22 inside the motor rotor 2 is 3-6, such as 3, 4, 5 or 6.

[0056] In this way, when the motor in the compressor is running, the motor rotor 2 rotates in the motor stator 1, the motor rotation drives the rotation of the crankshaft 3, and the first spiral channel 31, the second spiral channel 21 and the third spiral channel 22 can all transport the gas in the space below the motor to the space above the motor. Therefore, the first spiral channel 31, the second spiral channel 21 and the third spiral channel 22 in this embodiment are all the upward discharge channels of the gas below the motor, and the first spiral channel 31, the second spiral channel 21 and the third spiral channel 22 can discharge more gas upward per unit time, so as to form a stronger negative pressure in the space below the motor, and thus it is more convenient for the refrigeration oil in the space above the motor to flow to the space below the motor, so as to facilitate the oil return of the compressor.

[0057] Embodiment 9:

[0058] The embodiment provides a compressor comprising the oil return facilitating assembly provided in the embodiments 1 to 8. By means of the oil return facilitating assembly, the refrigeration oil in the space above the motor in the compressor can flow to the space below the motor and flow back to the oil pool more easily, so that there is not too much refrigeration oil accumulated in the space above the motor in the compressor, the oil return efficiency of the compressor is higher, the amount of refrigeration oil in the oil pool is ensured, so that the oil pump can pump sufficient refrigeration oil into the pump body, so that the compressor is more reliable in operation, and since there is less refrigeration oil accumulated above the motor, the oil content in the refrigerant discharged from the exhaust port of the compressor is less, the refrigerant oil-carrying rate is reduced, and the stability of the compressor in operation is improved.

[0059] Embodiment 10:

[0060] The embodiment provides an air conditioner comprising the compressor provided in the embodiment 9, so that the air conditioner is more reliable and stable in operation.

[0061] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An assembly to facilitate oil return for a compressor, the assembly comprising: The motor stator, the motor rotor and the crankshaft, the motor rotor is rotatably installed in the motor stator, the crankshaft has a matching section, the matching section is matched with the motor rotor, the motor rotor and / or the crankshaft is provided with a main active flow channel, when the motor rotor drives the crankshaft to rotate, the main active flow channel transports the gas in the space below the motor to the space above the motor; The main active flow channel is a spiral channel, the spiral channel is located on the motor rotor and / or the crankshaft, the spiral channel is communicated with the space above the motor and the space below the motor, so that when the motor operates in the compressor, the spiral channel on the motor rotor and / or the crankshaft rotates, thereby driving the gas in the space below the motor to enter the space above the motor, and at the same time, the space below the motor forms a negative pressure.

2. An assembly to facilitate oil return from a compressor as claimed in claim 1, wherein: The main active flow channel is a first spiral channel opened on the outer wall of the matching section of the crankshaft, the first spiral channel is communicated with the space above the motor and the space below the motor.

3. An assembly for facilitating oil return from a compressor as recited in claim 1, wherein: The main active flow channel is a second spiral channel opened on the outer wall of the motor rotor, the second spiral channel is communicated with the space above the motor and the space below the motor.

4. An assembly to facilitate oil return from a compressor as recited in claim 1, wherein: The main active flow channel is a third spiral channel opened in the motor rotor, the third spiral channel is communicated with the space above the motor and the space below the motor.

5. An assembly for facilitating oil return from a compressor as recited in claim 1, wherein: The main active flow channel is a first spiral channel opened on the outer wall of the matching section of the crankshaft and a second spiral channel opened on the outer wall of the motor rotor, the first spiral channel and the second spiral channel are both communicated with the space above the motor and the space below the motor.

6. An assembly to facilitate oil return from a compressor as recited in claim 1, wherein: The main active flow channel is a first spiral channel opened on the outer wall of the matching section of the crankshaft and a third spiral channel opened in the motor rotor, the first spiral channel and the third spiral channel are both communicated with the space above the motor and the space below the motor.

7. An assembly for facilitating oil return from a compressor as recited in claim 1, wherein: The main active flow channel is a second spiral channel opened on the outer wall of the motor rotor and a third spiral channel opened in the motor rotor, the second spiral channel and the third spiral channel are both communicated with the space above the motor and the space below the motor.

8. An assembly for facilitating oil return from a compressor as recited in claim 1, wherein: The main active flow channel is a first spiral channel opened on the outer wall of the matching section of the crankshaft, a second spiral channel opened on the outer wall of the motor rotor and a third spiral channel opened in the motor rotor, the first spiral channel, the second spiral channel and the third spiral channel are all communicated with the space above the motor and the space below the motor.

9. A compressor characterized by: The assembly facilitating oil return of the compressor comprises the assembly facilitating oil return of the compressor according to any one of claims 1-8.

10. An air conditioner characterized by comprising: The compressor comprises the assembly facilitating oil return of the compressor according to claim 9.

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