Crankshaft assembly, pump body assembly, compressor and air conditioner

Abstract

The application provides a crankshaft assembly, a pump body assembly, a compressor and an air conditioner, wherein the crankshaft assembly comprises a crankshaft, a movable element and a driving mechanism, the crankshaft is used for being driven to rotate by a motor assembly, the crankshaft has a central oil hole and a side oil outlet hole communicated with the central oil hole; at least a part of the movable element is made of a magnetic material, and the movable element is located in a magnetic field of the motor assembly to be subjected to a magnetic pull applied by the magnetic field of the motor assembly; the driving mechanism cooperates with the magnetic pull to drive the movable element to move to a first position when the compressor is operated at a high frequency, so as to close the side oil outlet hole. According to the technical scheme of the application, the movable element can be driven to close the side oil outlet hole when the compressor is operated at a high frequency, so that the side oil outlet hole can be prevented from discharging oil when the compressor is operated at a high frequency, the oil is prevented from being carried out of the compressor by exhaust flow, and then the oil discharge rate of the compressor when operated at a high frequency can be reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of compressors, and particularly relates to a crankshaft assembly, a pump body assembly, a compressor and an air conditioner. BACKGROUND

[0002] As shown in Figure 1 and 2 , the compressor is one of the core components of the air conditioning equipment. In the working process, the motor assembly 21 drives the crankshaft 10 to rotate at high speed to generate centrifugal force to pump the refrigeration oil in the bottom oil pool to each oil outlet hole of the crankshaft 10, and then the refrigeration oil flows out along each oil outlet hole to lubricate, cool and seal each friction pair, effectively ensuring the reliability and performance of the compressor. Among them, the side oil outlet hole 103 at the long axis of the crankshaft 10 mainly plays a pressure relief role to prevent the refrigeration oil from circulating normally to take away the heat generated by the compressor during operation due to the excessive pressure in the central oil hole 100 of the crankshaft 10, causing damage to the compressor. However, when the compressor operates at high frequency, the exhaust flow is large, which will blow the refrigeration oil sprayed from the side oil outlet hole 103 upward and finally discharge the compressor, resulting in a large oil discharge rate of the compressor, insufficient refrigeration oil in the compressor, and the inability to lubricate, cool and seal the internal parts. Moreover, a large oil discharge rate will result in a high oil content in the air conditioning system, which seriously affects the heat exchange performance of the air conditioning system. SUMMARY

[0003] Therefore, the application provides a crankshaft assembly, a pump body assembly, a compressor and an air conditioner, which can solve the technical problem that when the compressor operates at high frequency, the exhaust flow is large, which will blow the refrigeration oil sprayed from the side oil outlet hole of the crankshaft upward and discharge the compressor, resulting in a large oil discharge rate of the compressor.

[0004] In order to solve the above problems, the application provides a crankshaft assembly, which comprises a crankshaft, a movable member and a driving mechanism, the crankshaft is used to be driven by a motor assembly to rotate, the crankshaft has a central oil hole and a side oil outlet hole communicating with the central oil hole;

[0005] At least a part of the movable member is made of a magnetic material, and the movable member is located in the magnetic field of the motor assembly to be subjected to a magnetic pull applied by the magnetic field of the motor assembly;

[0006] The driving mechanism cooperates with the magnetic pull to drive the movable member to move to a first position when the compressor operates at high frequency, so as to close the side oil outlet hole.

[0007] In some embodiments, the driving mechanism cooperates with the magnetic pull to further drive the movable member to move to a second position when the compressor operates at low frequency, so as to open the side oil outlet hole.

[0008] In some embodiments, the movable member is arranged in the central oil hole, and the movable member is configured to move along a center line direction of the central oil hole to the first position and the second position.

[0009] In some embodiments, the driving mechanism comprises an elastic member, and the driving mechanism is configured to drive the movable member to move in cooperation with the magnetic pulling force through the elastic member.

[0010] In some embodiments, when the movable member is arranged in the central oil hole, and the movable member is configured to move along a center line direction of the central oil hole to the first position and the second position, the elastic member is also arranged in the central oil hole, and the elastic member and the movable member are sequentially arranged along the center line direction of the central oil hole; wherein,

[0011] The central oil hole is further provided with a first limiting structure located on a side of the elastic member away from the movable member, and the first limiting structure is configured to stop and limit one end of the elastic member away from the movable member; and / or, the central oil hole is further provided with a second limiting structure located on a side of the movable member away from the elastic member, and the second limiting structure is configured to stop and limit one end of the movable member away from the elastic member.

[0012] In some embodiments, when the central oil hole is further provided with the first limiting structure, one end of the elastic member away from the movable member is in abutment with the first limiting structure;

[0013] and / or, one end of the elastic member close to the movable member is in abutment with the movable member.

[0014] In some embodiments, when the central oil hole is further provided with the second limiting structure, the movable member is in abutment with the second limiting structure when in the second position; the movable member is away from the second limiting structure when in the first position, and presses the elastic member to compress and deform the elastic member.

[0015] In some embodiments, one end of the crankshaft has an oil inlet communicating with the central oil hole, and the other end of the crankshaft has an oil outlet communicating with the central oil hole.

[0016] The crankshaft assembly further comprises a throttling device configured to throttle the oil flowing out of the oil outlet.

[0017] In some embodiments, when the first limiting structure is arranged in the central oil hole, the central oil hole has a first section and a second section connected in sequence along the axial direction of the crankshaft, the first section has the oil inlet, and the second section has the oil outlet; the connecting position of the first section and the second section forms a clamping table, and the clamping table forms the first limiting structure.

[0018] When the second limiting structure is arranged in the central oil hole, the second limiting structure includes a limiting plug, the second limiting structure limits the position of the one end of the movable element away from the elastic element by the limiting plug, and the limiting plug is provided with a first liquid passage hole for the oil in the central oil hole.

[0019] When the movable element is arranged in the central oil hole, the movable element is provided with a second liquid passage hole for the oil in the central oil hole.

[0020] The application further provides a pump body assembly comprising the crankshaft assembly.

[0021] The application further provides a compressor comprising the crankshaft assembly or the pump body assembly.

[0022] The application further provides an air conditioner comprising the crankshaft assembly or the pump body assembly or the compressor.

[0023] The crankshaft assembly, the pump body assembly, the compressor and the air conditioner have the following beneficial effects: the movable element can be driven to close the side oil outlet hole when the compressor is operated at a high frequency, so that the side oil outlet hole can be prevented from discharging oil when the compressor is operated at a high frequency, the oil is prevented from being carried out of the compressor by the exhaust gas flow, the oil discharge rate of the compressor when operated at a high frequency is reduced, sufficient refrigeration oil is ensured in the compressor to lubricate the compressor, the reliability of the compressor is improved, the heat exchange performance of the air conditioning system is improved, and the user experience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. The drawings in the following description are only exemplary, and those skilled in the art can also obtain other embodiments of the drawings according to the provided drawings without paying creative labor.

[0025] Figure 1 is a structural schematic diagram of a conventional compressor in the prior art;

[0026] Figure 2 is Figure 1 a schematic diagram of the flow direction of refrigeration oil when the conventional compressor is in high frequency operation;

[0027] Figure 3 is a schematic diagram of the structure of the compressor of the present application;

[0028] Figure 4 is a schematic diagram of the structure of the crankshaft assembly of the present application;

[0029] Figure 5 is Figure 4 is an enlarged schematic diagram of A in the above figure;

[0030] Figure 6 is a schematic diagram of the flow direction of refrigeration oil when the compressor is in low frequency operation;

[0031] Figure 7 is a schematic diagram of the flow direction of refrigeration oil when the compressor is in high frequency operation;

[0032] Figure 8 is Figure 7 is an enlarged schematic diagram of B in the above figure;

[0033] Figure 9 is a schematic diagram of the comparison of the oil discharge rate of the compressor of the present application and that of a conventional compressor.

[0034] The reference signs are:

[0035] 1, stator; 2, rotor; 3, upper flange; 4, upper cylinder; 5, lower cylinder; 6, lower flange; 7, lower flange cover plate; 8, oil suction pipe; 9, shell; 10, crankshaft; 11, partition plate; 12, oil guide vane; 14, throttling device; 15, elastic member; 16, movable member; 17, limiting plug; 21, motor assembly; 10a, first section; 10b, second section; 15a, one end of the elastic member away from the movable member; 15b, one end of the elastic member close to the movable member; 100, central oil hole; 101, oil inlet; 102, oil outlet; 103, side oil outlet hole; 151, clamping post; 161, second liquid passage; 171, first liquid passage. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way limits the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0037] In the description of the application, it needs to be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and in the absence of the opposite description, these orientation words do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the scope of protection of the application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0038] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the devices described in the drawings. For example, if the devices in the drawings are inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0039] In addition, it should be noted that the use of the words "first", "second" and the like to define parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as a limitation on the scope of protection of the application.

[0040] For reference Figures 3-8 As shown, according to the embodiment of the application, a crankshaft assembly is provided, which comprises a crankshaft 10, a movable member 16 and a driving mechanism. The crankshaft 10 is used to be driven to rotate by a motor assembly 21. The crankshaft 10 has a central oil hole 100 and a side oil outlet hole 103 communicating with the central oil hole 100. At least a part of the movable member 16 is made of a magnetic material, and the movable member 16 is located in the magnetic field of the motor assembly 21 to be subjected to the magnetic pull applied by the magnetic field of the motor assembly 21. Preferably, the entire movable member 16 is made of a magnetic material to increase the magnetic pull applied by the magnetic field of the motor assembly 21 to the movable member 16, which is beneficial to driving the movement of the movable member 16.

[0041] The driving mechanism cooperates with the magnetic pull to drive the movable member 16 to move to a first position to close the side oil outlet hole 103 (as shown in Figures 7-8 the drawings) when the compressor is operated at high frequency.

[0042] In the above example, since the movable element 16 can be driven to close the side oil outlet hole 103 when the compressor is running at high frequency, the side oil outlet hole 103 can be prevented from discharging oil when the compressor is running at high frequency, so that the oil can be prevented from being carried out of the compressor by the exhaust gas flow, and thus the oil discharge rate of the compressor when running at high frequency can be reduced.

[0043] In some embodiments, as shown in Figures 4-5 the aforementioned driving mechanism and magnetic pull also cooperate to drive the movable element 16 to move to the second position when the compressor is running at low frequency, so as to open the side oil outlet hole 103, thereby not affecting the normal operation of the compressor at low frequency.

[0044] It should be noted here that the magnetic pull on the movable element 16 is positively correlated with the eccentricity of the motor rotor 2. When the compressor is running at low frequency, the motor rotor 2 runs at low speed, the crankshaft 10 has small deflection, and the motor rotor 2 has small eccentricity, so that the magnetic pull on the movable element 16 is small; when the compressor is running at high frequency, the motor rotor 2 runs at high speed, the crankshaft 10 has large deflection, and the motor rotor 2 has large eccentricity, so that the magnetic pull on the movable element 16 is large.

[0045] In some embodiments, the aforementioned movable element 16 can be a flow guide pin or the like.

[0046] In some embodiments, as shown in Figure 4 the aforementioned movable element 16 is arranged in the central oil hole 100, and the movable element 16 is used to move along the center line direction of the central oil hole 100 to the aforementioned first position and second position.

[0047] In the above example, the central oil hole 100 can guide the movement of the movable element 16, so that the central oil hole 100 has a dual role. Specifically, the central oil hole 100 has the role of guiding oil on one hand, and has the role of guiding the movement of the movable element 16 on the other hand.

[0048] In order to realize the function of the aforementioned driving mechanism, in some embodiments, as shown in Figures 4-5 the aforementioned driving mechanism can include an elastic element 15, which can be a spring or a flexible plastic or the like. The driving mechanism drives the movable element 16 to move by cooperating with the magnetic pull through the elastic element 15.

[0049] In the above example, the elastic element 15 cooperates with the magnetic pull on the movable element 16 to automatically regulate the position of the movable element 16 at high and low frequencies, without the need to provide a power source, so that power cost can be saved.

[0050] In some embodiments, as shown in Figures 4-5As shown, when the movable member 16 is disposed within the central oil hole 100, and the movable member 16 is used to move along the centerline direction of the central oil hole 100 to the aforementioned first and second positions, the elastic member 15 is also disposed within the central oil hole 100, and the elastic member 15 and the movable member 16 are arranged sequentially along the centerline direction of the central oil hole 100. By disposing of both the elastic member 15 and the movable member 16 within the central oil hole 100, installation space can be saved, making the overall structure more compact.

[0051] like Figure 5 As shown, a first limiting structure is also provided within the aforementioned central oil hole 100. This first limiting structure is located on the side of the elastic member 15 facing away from the movable member 16. The first limiting structure is used to stop and limit one end 15a of the elastic member facing away from the movable member. Preferably, the one end 15a of the elastic member facing away from the movable member can remain in contact with the first limiting structure, which facilitates assembly.

[0052] like Figure 5 As shown, a second limiting structure is also provided inside the aforementioned central oil hole 100. This second limiting structure is located on the side of the movable member 16 that is away from the elastic member 15. The second limiting structure is used to stop and limit the end of the movable member 16 that is away from the elastic member 15, so as to restrict the movement trajectory of the movable member 16 and facilitate the movement of the movable member 16 between the first position and the second position.

[0053] In some implementations, such as Figure 5 As shown, the end 15b of the aforementioned elastic member near the movable member is in contact with the movable member 16, which also facilitates assembly.

[0054] In some embodiments, when a second limiting structure is also provided inside the central oil hole 100, the movable member 16 abuts against the second limiting structure in the second position (e.g., Figure 5 (As shown); when the movable part 16 is in the first position, it moves away from the second limiting structure and presses against the elastic part 15, causing the elastic part 15 to compress and deform (as shown). Figure 8 (As shown).

[0055] In the example above, such as Figure 5 As shown, when the compressor operates at low frequency, the magnetic pull on the moving part 16 is relatively small. Under the combined force of the magnetic pull and the elastic force applied by the elastic member 15, the moving part 16 moves to the second position and abuts against the second limiting structure. The second limiting structure can prevent the moving part 16 from moving excessively. Figure 8As shown, when the compressor operates at high frequency, the magnetic pull force on the movable part 16 is relatively large. Under the combined force of the magnetic pull force and the elastic force applied by the elastic element 15, the movable part 16 moves to the aforementioned first position. At this time, the movable part 16 moves away from the second limiting structure and squeezes the elastic element 15, causing the elastic element 15 to compress and deform. When the compressor frequency gradually decreases from high frequency to low frequency, the magnetic pull force on the movable part 16 gradually decreases, the elastic element 15 releases its elastic deformation, and the movable part 16 moves to the second position under the action of the elastic force applied by the elastic element 15. When the compressor frequency drops to the low frequency, the movable part 16 moves to the second position.

[0056] In some implementations, such as Figure 4 As shown, one end of the aforementioned crankshaft 10 has an oil inlet 101 that communicates with the central oil hole 100. This end of the crankshaft 10 is inserted into the oil sump of the compressor. When the crankshaft 10 rotates at high speed under the drive of the motor assembly 21, the refrigerant oil in the oil sump can be pumped into the central oil hole 100 through the oil inlet 101.

[0057] Among them, such as Figure 4 As shown, the other end of the crankshaft 10 has an oil outlet 102 communicating with the central oil hole 100. The crankshaft assembly also includes a throttling device 14, which is used to throttle the oil flowing out of the oil outlet to prevent the refrigeration oil from being directly sprayed out from the oil outlet 102 to the vicinity of the compressor exhaust pipe and being carried out of the compressor by the exhaust flow, resulting in a large oil discharge rate of the compressor.

[0058] In the above example, when the side oil outlet 103 is closed, the refrigerant oil in the central oil outlet 100 flows to the oil outlet 102. After being throttled by the throttling device 14, it flows out from the oil outlet 102. Then, under the centrifugal force of the crankshaft 10, it is thrown onto the inner wall of the compressor housing and flows into the oil sump along the inner wall of the housing. This ensures that there is enough refrigerant oil in the compressor to lubricate it, improves the reliability of the compressor and the heat exchange performance of the air conditioning system, and enhances the user experience.

[0059] In some embodiments, the aforementioned throttling device 14 may include an oil plug with a throttling orifice, and the throttling device 14 throttles the oil flowing out of the oil outlet through the throttling orifice on the oil plug.

[0060] To achieve the function of the aforementioned first limiting structure, in some embodiments, such as Figures 4-5As shown, when the first limiting structure is arranged in the central oil hole 100, the central oil hole 100 has a first section 10a and a second section 10b connected in sequence along the axial direction of the crankshaft 10, the first section 10a has the oil inlet 101, and the second section 10b has the oil outlet 102. The connecting position of the first section 10a and the second section 10b forms a clamping table 151, which forms the first limiting structure, and thus has the advantage of facilitating the machining of the first limiting structure.

[0061] In order to realize the function of the second limiting structure, in some embodiments, as shown in Figures 4-5 As shown, when the second limiting structure is arranged in the central oil hole 100, the second limiting structure can include a limiting plug 17, and the second limiting structure limits the position of the end of the movable element 16 away from the elastic element 15 through the limiting plug 17. The limiting plug 17 is provided with a first liquid passage hole 171 for the oil in the central oil hole 100 to flow through, so as not to affect the flow of the oil in the central oil hole 100 to the oil outlet 102.

[0062] In some embodiments, as shown in Figure 5 As shown, when the movable element 16 is arranged in the central oil hole 100, the movable element 16 is provided with a second liquid passage hole 161 for the oil in the central oil hole 100 to flow through, so as not to affect the flow of the oil in the central oil hole 100 to the oil outlet 102.

[0063] In some embodiments, as shown in Figure 5 As shown, the movable element 16 can have a first circular ring structure, and the inner hole of the first circular ring structure is the second liquid passage hole 161. The limiting plug 17 can have a second circular ring structure, and the inner hole of the second circular ring structure is the first liquid passage hole 171. The limiting plug 17 is in interference fit with the central oil hole 100, so as to be fixed in the central oil hole 100. The diameter of the first liquid passage hole 171 is smaller than the outer diameter of the movable element 16, so as to prevent the movable element 16 from falling out of the first liquid passage hole 171.

[0064] In some embodiments, the present application further provides a pump body assembly comprising the crankshaft assembly of any one of the above. Due to the adoption of the crankshaft assembly, the movable element 16 can be driven to close the side oil outlet hole 103 when the compressor is running at a high frequency, so as to prevent the side oil outlet hole 103 from discharging oil when the compressor is running at a high frequency, avoid the oil being carried out of the compressor by the exhaust gas flow, and thus reduce the oil discharge rate of the compressor when running at a high frequency.

[0065] In some embodiments, the present application also provides a compressor comprising the crankshaft assembly of any one of the above; or comprising the pump body assembly of the above. Wherein, the compressor can prevent the side oil outlet hole 103 from discharging oil at high frequency of the compressor, avoid the oil being carried out of the compressor by the exhaust flow, and thus reduce the oil discharge rate of the compressor at high frequency, due to the adoption of the crankshaft assembly.

[0066] Figure 9 A schematic diagram of the oil discharge rate comparison between the compressor of the present application and a conventional compressor is shown. Figure 1 A schematic diagram of the structure of a conventional compressor is shown. As shown in Figure 1 the conventional compressor is composed of a motor assembly 21, an upper flange 3, an upper cylinder 4, a lower cylinder 5, a lower flange 6, a lower flange cover plate 7, an oil suction pipe 8, an oil guide sheet 12, refrigeration oil, a partition plate 11, a crankshaft 10 and a shell 9. The motor assembly 21 comprises a stator 1 and a rotor 2. Figure 2 A schematic diagram of the refrigeration oil flow direction of the conventional compressor at high frequency is shown. As shown in Figure 2 During the high frequency operation of the compressor, the motor assembly 21 of the compressor drives the crankshaft 10 to rotate at high speed to generate a strong centrifugal force, so that the internal refrigeration oil flows upward after passing through the oil suction pipe 8 and the oil guide sheet 12, and then is sprayed out from the side oil outlet hole 103 of the crankshaft 10. At this time, the frequency of the compressor is high, and the exhaust flow is large, which blows the refrigeration oil sprayed out of the side oil outlet hole 103 upward, and finally discharges out of the compressor, resulting in a large oil discharge rate of the compressor. Figure 3 A schematic diagram of the structure of the compressor of the present application is shown. As shown in Figure 3 the compressor of the present application comprises the parts contained in the conventional compressor, and further comprises a limiting plug 17, a movable piece 16, an elastic piece 15 and an oil plug.

[0067] Figure 4 A schematic diagram of the structure of the crankshaft assembly of the present application is shown. As shown in Figures 4-5 the limiting plug 17, the movable piece 16, the elastic piece 15 and the oil plug are sequentially arranged in the central oil hole 100 of the crankshaft 10 from bottom to top, wherein the limiting plug 17, the movable piece 16 and the elastic piece 15 are arranged near the side oil outlet hole 103 of the crankshaft 10, the movable piece 16 can move upward or downward under the combined action of the elastic force exerted by the elastic piece 15 and the magnetic pull force exerted by the motor magnetic field, so as to close or open the side oil outlet hole 103, when the side oil outlet hole 103 is closed, the refrigeration oil in the central oil hole 100 flows upward, is throttled by the oil plug, and then flows out of the oil outlet 102 at the top end of the crankshaft 10, when the side oil outlet hole 103 is opened, the refrigeration oil in the central oil hole 100 flows out of the side oil outlet hole 103.

[0068] Figure 6A schematic diagram of the flow direction of the refrigeration oil when the compressor of the present application is running at low frequency is shown in Fig. 1. Figure 6 As shown in Fig. 1, when the compressor is running at low frequency, the magnetic pull on the movable member 16 is small, the movable member 16 moves downward under the combined action of the magnetic pull exerted by the magnetic field of the motor and the elastic force exerted by the elastic member 15, the side oil outlet hole 103 of the crankshaft 10 is open, the refrigeration oil in the oil pool flows upward under the action of the centrifugal force, and then flows out of the side oil outlet hole 103. At this time, since the frequency of the compressor is low, the exhaust flow is small, which has little effect on the flow direction of the refrigeration oil, and the refrigeration oil cannot be blown out of the compressor. In addition, when the compressor is running at low frequency, its oil pumping capacity is weak, the amount and speed of oil flowing out of the side oil outlet hole 103 are small, and the refrigeration oil only flows downward along the outer wall of the upper flange 3 and finally flows into the oil pool.

[0069] Figure 7 A schematic diagram of the flow direction of the refrigeration oil when the compressor of the present application is running at high frequency is shown in Fig. 2. Figures 7-8 As shown in Fig. 2, when the compressor is running at high frequency, the magnetic pull on the movable member 16 is large, the movable member 16 moves upward under the combined action of the magnetic pull exerted by the magnetic field of the motor and the elastic force exerted by the elastic member 15, the side oil outlet hole 103 of the crankshaft 10 is closed, the refrigeration oil in the oil pool flows upward under the action of the centrifugal force, flows out of the top oil outlet hole 102 after throttling by the oil plug, and then is thrown to the inner wall of the shell under the action of the centrifugal force of the crankshaft 10, and finally flows into the oil pool along the inner wall of the shell.

[0070] Figure 9 A schematic diagram of the comparison of the oil discharge rate of the compressor of the present application with that of a conventional compressor is shown in Fig. 3. Figure 9 As shown in Fig. 3, at high frequency, the oil discharge rate of the compressor of the present application is lower than that of the conventional compressor, and the oil discharge rate of the compressor is effectively reduced.

[0071] In some embodiments, the present application also provides an air conditioner comprising the crankshaft assembly of any one of the above; or comprising the pump body assembly of the above; or comprising the compressor of the above. Due to the adoption of the crankshaft assembly of the above, the movable member 16 can be driven to close the side oil outlet hole 103 when the compressor is running at high frequency, so as to prevent the side oil outlet hole 103 from discharging oil when the compressor is running at high frequency, avoid the oil being carried out of the compressor by the exhaust flow, and thus reduce the oil discharge rate of the compressor when running at high frequency.

[0072] Wherein, the application sets the limiting plug 17, the movable element 16, the elastic element 15 and the oil plug in the crankshaft 10, when the compressor is in high frequency operation, the movable element 16 is moved upwards under the combined force of the magnetic pull exerted by the motor magnetic field and the elastic force exerted by the elastic element 15, and blocks the side oil outlet hole 103 of the crankshaft 10, the refrigerant oil in the central oil hole 100 of the crankshaft 10 can only flow out through the oil outlet 102 at the top after throttling by the oil plug, and then is thrown to the inner wall of the shell under the centrifugal force of the crankshaft 10, and finally returns to the oil pool along the inner wall of the shell, preventing the refrigerant oil from being sprayed out of the side oil outlet hole 103 and directly affected by the exhaust flow to blow out of the compressor, reducing the oil discharge rate of the compressor, ensuring that there is enough refrigerant oil in the compressor to lubricate the compressor, improving the reliability of the compressor and improving the heat exchange performance of the air conditioning system, and improving the user experience.

[0073] Wherein, the application solves the problem of high oil discharge rate when the compressor is in high frequency operation, and also solves the problem of part wear caused by lack of oil when the compressor is in high frequency operation, and the problem of poor heat exchange performance of the air conditioning system when the compressor is in high frequency operation.

[0074] Those skilled in the art will readily understand that the advantageous technical features of the above-mentioned modes can be freely combined and superimposed without conflict.

[0075] The above is only the preferred embodiment of the present application, and is not intended to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred embodiment of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, which should be regarded as the protection scope of the present application.

Claims

1. A crankshaft assembly characterized by: The crankshaft (10) is used for rotating under the driving of a motor assembly (21), and has a central oil hole (100) and a side oil outlet hole (103) communicating with the central oil hole (100); At least a part of the movable member (16) is made of a magnetic material, and the movable member (16) is located in a magnetic field of the motor assembly (21) to be subjected to a magnetic pull applied by the magnetic field of the motor assembly (21); The driving mechanism cooperates with the magnetic pull to drive the movable member (16) to move to a first position to close the side oil outlet hole (103) when the compressor is operated at a high frequency, and to move to a second position to open the side oil outlet hole (103) when the compressor is operated at a low frequency; wherein the magnetic pull applied to the movable member (16) is smaller when the compressor is operated at the low frequency and is larger when the compressor is operated at the high frequency; The movable member (16) is arranged in the central oil hole (100), and a second liquid passage hole (161) for allowing oil in the central oil hole (100) to flow through is arranged on the movable member (16); the movable member (16) is used for moving along a center line direction of the central oil hole (100) to the first position and the second position; the driving mechanism comprises a resilient member (15), the resilient member (15) is also arranged in the central oil hole (100), and the resilient member (15) and the movable member (16) are arranged in sequence along the center line direction of the central oil hole (100); the driving mechanism drives the movable member (16) to move by cooperating with the magnetic pull through the resilient member (15).

2. The crankshaft assembly according to claim 1, wherein: a first limiting structure is further arranged in the central oil hole (100), the first limiting structure is located on a side of the resilient member (15) away from the movable member (16), and the first limiting structure is used for stopping and limiting an end (15a) of the resilient member away from the movable member; and / or, a second limiting structure is further arranged in the central oil hole (100), the second limiting structure is located on a side of the movable member (16) away from the resilient member (15), and the second limiting structure is used for stopping and limiting an end of the movable member (16) away from the resilient member (15).

3. The crankshaft assembly according to claim 2, wherein: when the first limiting structure is further arranged in the central oil hole (100), the end (15a) of the resilient member away from the movable member abuts against the first limiting structure; and / or, an end (15b) of the resilient member close to the movable member abuts against the movable member (16).

4. The crankshaft assembly according to claim 2 or 3, wherein: When the second limiting structure is arranged in the central oil hole (100), the movable element (16) is in abutment with the second limiting structure when in the second position; the movable element (16) is away from the second limiting structure when in the first position, and the elastic element (15) is extruded to be compressed and deformed.

5. The crankshaft assembly according to any one of claims 1-3, characterized in that: One end of the crankshaft (10) has an oil inlet (101) communicating with the central oil hole (100), and the other end of the crankshaft (10) has an oil outlet (102) communicating with the central oil hole (100); The crankshaft assembly further comprises a throttling device (14) for throttling the oil flowing out of the oil outlet (102).

6. The crankshaft assembly according to claim 5, characterized in that: When the first limiting structure is arranged in the central oil hole (100), the central oil hole (100) has a first section (10a) and a second section (10b) connected in sequence along the axial direction of the crankshaft (10), the first section (10a) has the oil inlet (101), and the second section (10b) has the oil outlet (102); the connecting part of the first section (10a) and the second section (10b) forms a clamping post (151), and the clamping post (151) forms the first limiting structure; And / or, when the second limiting structure is arranged in the central oil hole (100), the second limiting structure comprises a limiting plug (17), and the second limiting structure limits the end of the movable element (16) away from the elastic element (15) by the limiting plug (17); the limiting plug (17) is provided with a first liquid passage hole (171) for the oil in the central oil hole (100) to flow through.

7. A pump body assembly characterized by: The crankshaft assembly according to any one of claims 1-6.

8. A compressor characterized by: The pump body assembly according to claim 7.

9. An air conditioner characterized by comprising: The compressor according to claim 8.

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