Crankshaft assembly, pump body assembly, compressor and air conditioner

Abstract

The invention provides a crankshaft assembly, a pump body assembly, a compressor and an air conditioner, the crankshaft assembly comprises a crankshaft, a movable part and a driving mechanism, the crankshaft is used for being driven by a motor assembly to rotate, and the crankshaft is provided with a center oil hole and a side face oil outlet hole communicating with the center oil hole; at least one part of the movable part is made of a magnetic material, and the movable part is located in a magnetic field of the motor assembly so as to bear magnetic pulling force applied by the magnetic field of the motor assembly; the driving mechanism is matched with the magnetic pulling force to drive the movable part to move to a first position when the compressor operates at high frequency so as to close the side face oil outlet hole. According to the technical scheme, due to the fact that the movable part can be driven to close the side face oil outlet hole when the compressor operates at high frequency, the side face oil outlet hole can be prevented from discharging oil when the compressor operates at high frequency, oil liquid is prevented from being carried out of the compressor by exhaust flow, and then the oil spitting rate of the compressor during high-frequency operation can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of compressors, and in particular relates to a crankshaft assembly, a pump body assembly, a compressor and an air conditioner. Background Art

[0002] like Figure 1 and 2 As shown, the compressor is one of the core components of the air-conditioning equipment. During its operation, the motor assembly 21 drives the crankshaft 10 to rotate at a high speed to generate centrifugal force to pump the refrigerant oil in the bottom oil pool to the oil outlet holes of the crankshaft 10, and then flows out along the oil outlet holes to lubricate, cool and seal the friction pairs, 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 pressure in the central oil hole 100 of the crankshaft 10 from being too high, causing the refrigerant oil to be unable to circulate normally and take away the heat generated by the compressor, causing damage to the compressor. However, when the compressor is running at a high frequency, the exhaust flow is large, and the exhaust flow will blow the refrigerant oil sprayed from the side oil outlet hole 103 upwards, and finally discharge the compressor, resulting in a large oil discharge rate of the compressor, insufficient refrigerant oil in the compressor, and unable to lubricate, cool and seal the internal parts. In addition, a large oil discharge rate will lead to a high oil content in the air-conditioning system, which seriously affects the heat exchange performance of the air-conditioning system. Summary of the invention

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

[0004] In order to solve the above problems, the present invention provides a crankshaft assembly, which includes a crankshaft, a movable part and a driving mechanism, wherein the crankshaft is used to be driven by a motor assembly to rotate, and the crankshaft has a central oil hole and a side oil outlet hole connected to the central oil hole;

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

[0006] The driving mechanism cooperates with the magnetic pulling force to drive the movable part to move to the first position when the compressor is running at a high frequency, so as to close the side oil outlet hole.

[0007] In some embodiments, the driving mechanism and the magnetic pulling force also cooperate to drive the movable member to move to the second position when the compressor operates at a low frequency, so as to open the side oil outlet hole.

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

[0009] In some embodiments, the driving mechanism includes an elastic member, and the driving mechanism drives the movable member to move by cooperating between the elastic member and the magnetic pulling force.

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

[0011] A first limiting structure is also provided in the central oil hole, and the first limiting structure is located on the side of the elastic part away from the movable part, and the first limiting structure is used to stop and limit the end of the elastic part away from the movable part; and / or, a second limiting structure is also provided in the central oil hole, and the second limiting structure is located on the side of the movable part away from the elastic part, and the second limiting structure is used to stop and limit the end of the movable part away from the elastic part.

[0012] In some embodiments, when a first limiting structure is further provided in the central oil hole, an end of the elastic member that faces away from the movable member is in contact 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 a second limiting structure is further provided in the central oil hole, the movable part abuts against the second limiting structure when in the second position; the movable part is away from the second limiting structure when in the first position and squeezes the elastic part to compress and deform the elastic part.

[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] Wherein, the crankshaft assembly further comprises a throttling device, and the throttling device is used to throttle the oil flowing out of the oil outlet hole.

[0017] In some embodiments, when the first limiting structure is provided 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; wherein a clamping platform is formed at the connection between the first section and the second section, and the clamping platform forms the first limiting structure;

[0018] And / or, when a second limiting structure is provided in the central oil hole, the second limiting structure comprises a limiting plug, and the second limiting structure stops and limits one end of the movable part away from the elastic part through the limiting plug; wherein the limiting plug is provided with a first liquid outlet hole for the oil in the central oil hole to flow;

[0019] And / or, when the movable part is arranged in the central oil hole, the movable part is provided with a second fluid hole for the oil in the central oil hole to flow.

[0020] The present invention also provides a pump body assembly, which includes any one of the crankshaft assemblies described above.

[0021] The present invention also provides a compressor, which includes the crankshaft assembly described in any one of the above; or includes the pump body assembly described in the above.

[0022] The present invention also provides an air conditioner, which includes any one of the crankshaft assemblies described above; or includes the pump assembly described above; or includes the compressor described above.

[0023] A crankshaft assembly, a pump body assembly, a compressor and an air conditioner provided by the present invention have the following beneficial effects: since the movable parts can be driven to close the side oil outlet holes when the compressor is running at a high frequency, the side oil outlet holes can be prevented from discharging oil when the compressor is running at a high frequency, and the oil is prevented from being carried out of the compressor by the exhaust flow, thereby reducing the oil discharge rate of the compressor when running at a high frequency, ensuring that there is enough refrigerant oil in the compressor to lubricate the compressor, thereby improving the reliability of the compressor and the heat exchange performance of the air-conditioning system, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

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

[0026] Figure 2 yes Figure 1 Schematic diagram of refrigeration oil flow when conventional compressor is running at high frequency;

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

[0028] Figure 4 It is a schematic structural diagram of a crankshaft assembly of the present invention;

[0029] Figure 5 yes Figure 4 The enlarged schematic diagram of point A in the middle;

[0030] Figure 6 This is a schematic diagram of the flow of refrigerant oil when the compressor is running at low frequency;

[0031] Figure 7 This is a schematic diagram of the flow of refrigerant oil when the compressor is running at high frequency;

[0032] Figure 8 yes Figure 7 The enlarged schematic diagram of point B in the middle;

[0033] Fig. 9 It is a schematic diagram comparing the oil discharge rates of the compressor of the present invention and a conventional compressor.

[0034] The accompanying drawings are marked as follows:

[0035] 1. Stator; 2. Rotor; 3. Upper flange; 4. Upper cylinder; 5. Lower cylinder; 6. Lower flange; 7. Lower flange cover; 8. Oil suction pipe; 9. Housing; 10. Crankshaft; 11. Partition; 12. Oil guide plate; 14. Throttling device; 15. Elastic member; 16. Movable member; 17. Stop plug; 21. Motor assembly; 10a. First section; 10b. Second section; 15a. End of the elastic member away from the movable member; 15b. End of the elastic member close to the movable member; 100. Center oil hole; 101. Oil inlet; 102. Oil outlet; 103. Side oil outlet; 151. Card table; 161. Second liquid discharge hole; 171. First liquid discharge hole. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0038] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0039] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0040] See also Figure 3-8 As shown, according to an embodiment of the present invention, there is provided a crankshaft assembly, which includes a crankshaft 10, a movable part 16 and a driving mechanism. The crankshaft 10 is used to be driven to rotate by the motor assembly 21. The crankshaft 10 has a central oil hole 100 and a side oil outlet hole 103 connected to the central oil hole 100. At least a portion of the movable part 16 is made of magnetic material, and the movable part 16 is located in the magnetic field of the motor assembly 21 to be subjected to the magnetic pulling force exerted by the magnetic field of the motor assembly 21. Preferably, the movable part 16 is entirely made of magnetic material to increase the magnetic pulling force exerted by the magnetic field of the motor assembly 21 on the movable part 16, which is beneficial to drive the movable part 16 to move.

[0041] The driving mechanism cooperates with the magnetic pulling force to drive the movable member 16 to move to the first position when the compressor is running at high frequency, so as to close the side oil outlet hole 103 (such as Figure 7-8 shown).

[0042] In the above example, since the movable part 16 can be driven to close the side oil outlet hole 103 when the compressor is running at a high frequency, the side oil outlet hole 103 can be prevented from discharging oil when the compressor is running at a high frequency, thereby preventing the oil from being carried out of the compressor by the exhaust flow, thereby reducing the oil discharge rate of the compressor when running at a high frequency.

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

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

[0045] In some embodiments, the aforementioned movable member 16 may be a guide pin or the like.

[0046] In some embodiments, Figure 4 As shown, the aforementioned movable member 16 is disposed in the central oil hole 100 , and the movable member 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 center oil hole 100 can guide the movement of the movable part 16, so that the center oil hole 100 has a dual role. Specifically, the center oil hole 100 has the function of guiding oil on the one hand, and guiding the movement of the movable part 16 on the other hand.

[0048] In order to realize the functions of the aforementioned driving mechanism, in some embodiments, as Figure 4-5 As shown, the aforementioned driving mechanism may include an elastic member 15, and the elastic member 15 may be a spring or a flexible plastic, etc. The driving mechanism drives the movable member 16 to move through the elastic member 15 and the magnetic pulling force.

[0049] In the above example, the elastic member 15 cooperates with the magnetic pulling force exerted on the movable member 16 to realize automatic control of the position of the movable member 16 at high and low frequencies without providing a power source, thereby saving power costs.

[0050] In some embodiments, Figure 4-5As shown, when the movable member 16 is disposed in the central oil hole 100 and is used to move to the aforementioned first position and second position along the center line direction of the central oil hole 100, the elastic member 15 is also disposed in the central oil hole 100, and the elastic member 15 and the movable member 16 are arranged in sequence along the center line direction of the central oil hole 100. Among them, by disposing both the elastic member 15 and the movable member 16 in the central oil hole 100, installation space can be saved and the overall structure can be made more compact.

[0051] like Figure 5 As shown, the aforementioned central oil hole 100 is further provided with a first limiting structure, which is located on the side of the elastic member 15 away from the movable member 16. The first limiting structure is used to stop and limit the end 15a of the elastic member away from the movable member. Preferably, the end 15a of the elastic member away from the movable member can be kept in contact with the first limiting structure, which has the effect of facilitating assembly.

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

[0053] In some embodiments, Figure 5 As shown, the end 15b of the elastic member close to the movable member is kept in contact with the movable member 16, which also facilitates assembly.

[0054] In some embodiments, when a second limiting structure is further provided in the central oil hole 100, the movable member 16 abuts against the second limiting structure when in the second position (eg, Figure 5 When the movable member 16 is in the first position, it is away from the second limiting structure and squeezes the elastic member 15, so that the elastic member 15 is compressed and deformed (as shown); Figure 8 shown).

[0055] In the above example, if Figure 5 As shown in FIG. 1 , when the compressor is running at a low frequency, the magnetic pulling force on the movable part 16 is small, and the movable part 16 moves to the second position under the combined effect of the magnetic pulling force and the elastic force applied by the elastic part 15, and counteracts the second limiting structure. The second limiting structure can prevent the movable part 16 from excessive movement. Figure 8As shown, when the compressor is running at a high frequency, the magnetic pulling force on the movable part 16 is relatively large, and the movable part 16 moves to the aforementioned first position under the combined action of the magnetic pulling force and the elastic force applied by the elastic part 15. At this time, the movable part 16 is away from the second limiting structure and squeezes the elastic part 15, causing the elastic part 15 to be compressed and deformed. When the frequency of the compressor is gradually reduced from high frequency to low frequency, the magnetic pulling force on the movable part 16 gradually decreases, the elastic part 15 releases elastic deformation, and the movable part 16 moves to the second position under the action of the elastic force applied by the elastic part 15; when the frequency of the compressor is reduced to the low frequency, the movable part 16 moves to the second position.

[0056] In some embodiments, Figure 4 As shown, one end of the crankshaft 10 has an oil inlet 101 connected to the center oil hole 100. This end of the crankshaft 10 is inserted into the oil pool of the compressor. When the crankshaft 10 rotates at a high speed driven by the motor assembly 21, the refrigerant oil in the oil pool can be pumped into the center oil hole 100 through the oil inlet 101.

[0057] Among them, Figure 4 As shown, the other end of the crankshaft 10 has an oil outlet 102 connected to 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 refrigerant oil from directly spraying out of the oil outlet 102 to the vicinity of the compressor exhaust pipe and being carried away by the exhaust flow and discharged from the compressor, resulting in a large oil discharge rate of the compressor.

[0058] In the above example, when the side oil outlet hole 103 is closed, the refrigerant oil in the central oil hole 100 flows toward the oil outlet 102, and flows out from the oil outlet 102 after being throttled by the throttling device 14, and then is thrown to the inner wall of the compressor shell under the centrifugal force of the crankshaft 10, and flows into the oil pool along the inner wall of the shell, ensuring that there is enough refrigerant oil in the compressor to lubricate the compressor, thereby improving the reliability of the compressor and the heat exchange performance of the air-conditioning system, thereby improving the user experience.

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

[0060] In order to realize the function of the aforementioned first limiting structure, in some embodiments, as Figure 4-5As shown, when the first limiting structure is provided in the center oil hole 100, the center 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 aforementioned oil inlet 101, and the second section 10b has the aforementioned oil outlet 102. The connection between the first section 10a and the second section 10b forms a clamping platform 151, and the clamping platform 151 forms the aforementioned first limiting structure, which has the advantage of convenient processing of the first limiting structure.

[0061] In order to realize the function of the aforementioned second limiting structure, in some embodiments, as Figure 4-5 As shown, when a second limiting structure is provided in the central oil hole 100, the second limiting structure may include a limiting plug 17, and the second limiting structure stops and limits the end of the movable member 16 away from the elastic member 15 through the limiting plug 17. The limiting plug 17 is provided with a first liquid flow hole 171 for the oil in the central oil hole 100 to flow, 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, Figure 5 As shown, when the movable member 16 is disposed in the central oil hole 100 , a second fluid hole 161 is provided on the movable member 16 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, Figure 5 As shown, the movable part 16 can be in a first circular ring structure, and the inner hole of the first circular ring structure is the above-mentioned second liquid discharge hole 161. The aforementioned stopper 17 can be in a second circular ring structure, and the inner hole of the second circular ring structure is the above-mentioned first liquid discharge hole 171. The stopper 17 is interference-fitted with the central oil hole 100 to be fixed in the central oil hole 100. The aperture of the first liquid discharge hole 171 is smaller than the outer diameter of the movable part 16 to prevent the movable part 16 from falling from the first liquid discharge hole 171.

[0064] In some embodiments, the present invention further provides a pump body assembly, which includes any of the above crankshaft assemblies. In particular, because the pump body assembly adopts the above crankshaft assembly, the movable part 16 can be driven to close the side oil outlet hole 103 when the compressor is running at high frequency, thereby preventing the side oil outlet hole 103 from discharging oil when the compressor is running at high frequency, preventing the oil from being carried out of the compressor by the exhaust flow, and further reducing the oil discharge rate of the compressor when running at high frequency.

[0065] In some embodiments, the present invention further provides a compressor, which includes any of the above crankshaft assemblies; or includes the above pump assembly. In which, because the compressor adopts the above crankshaft assembly, the movable part 16 can be driven to close the side oil outlet hole 103 when the compressor is running at high frequency, thereby preventing the side oil outlet hole 103 from discharging oil when the compressor is running at high frequency, preventing the oil from being carried out of the compressor by the exhaust flow, and further reducing the oil discharge rate of the compressor when it is running at high frequency.

[0066] Fig. 9 A schematic diagram comparing the oil discharge rate of a compressor of the present invention and a conventional compressor is shown. Figure 1 FIG. 1 shows a schematic diagram of the structure of a conventional compressor. Figure 1 As shown, 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 7, an oil suction pipe 8, an oil guide plate 12, refrigeration oil, a partition 11, a crankshaft 10 and a housing 9. The motor assembly 21 includes a stator 1 and a rotor 2. Figure 2 This is a schematic diagram of the refrigerant oil flow when the conventional compressor is running at high frequency, as shown in Figure 2 As shown, during the high-frequency operation of the compressor, the motor assembly 21 of the compressor drives the crankshaft 10 to rotate at a high speed to generate a strong centrifugal force, so that the internal refrigerant oil flows upward through the oil suction pipe 8 and the oil guide plate 12, and then sprays out from the side oil outlet hole 103 of the crankshaft 10. Since the compressor frequency is high at this time, the exhaust flow is large, and the exhaust flow blows the refrigerant oil sprayed from the side oil outlet hole 103 upward, and finally discharges the compressor, resulting in a large oil discharge rate of the compressor. Figure 3 A schematic diagram of the structure of a compressor of the present invention is shown. Figure 3 As shown, the compressor of the present invention includes, in addition to the parts included in the conventional compressor, a stopper 17, a movable part 16, an elastic part 15 and an oil plug.

[0067] Figure 4 Schematic diagram of the structure of the crankshaft assembly of the present invention, as shown in Figure 4-5 As shown, a limit plug 17, a movable part 16, an elastic part 15 and an oil plug are sequentially arranged in the center oil hole 100 of the crankshaft 10 of the present invention from bottom to top, wherein the limit plug 17, the movable part 16 and the elastic part 15 are arranged near the side oil outlet hole 103 of the crankshaft 10, and the movable part 16 can move upward or downward under the combined action of the elastic force applied by the elastic part 15 and the magnetic pulling force applied by the motor magnetic field to close or open the side oil outlet hole 103. When the side oil outlet hole 103 is closed, the refrigerant oil in the center oil hole 100 flows upward, is throttled by the oil plug, and then flows out from the oil outlet 102 at the top of the crankshaft 10. When the side oil outlet hole 103 is opened, the refrigerant oil in the center oil hole 100 flows out from the side oil outlet hole 103.

[0068] Figure 6This is a schematic diagram of the flow of refrigeration oil when the compressor of the present invention is running at a low frequency. Figure 6 As shown, when the compressor is running at a low frequency, the magnetic pull on the movable part 16 is small, and the movable part 16 moves downward under the combined force of the magnetic pull exerted by the motor magnetic field and the elastic force exerted by the elastic part 15, and the side oil outlet hole 103 of the crankshaft 10 is opened. The refrigerant oil in the oil pool flows upward under the action of centrifugal force, and then flows out from the side oil outlet hole 103. At this time, due to the low frequency of the compressor, its exhaust flow is small, and the influence on the flow direction of the refrigerant oil is small, and the refrigerant oil cannot be blown out of the compressor. In addition, when the compressor is running at a low frequency, its oil pumping capacity is weak, and the oil output and oil output speed from the side oil outlet hole 103 are small. The refrigerant oil only flows downward along the outer wall surface of the upper flange 3 and finally flows into the oil pool.

[0069] Figure 7 This is a schematic diagram of the flow of refrigeration oil when the compressor of the present invention is running at high frequency. Figure 7-8 As shown, when the compressor is running at high frequency, the magnetic pulling force exerted on the movable part 16 is relatively large, and the movable part 16 moves upward under the combined force of the magnetic pulling force exerted by the motor magnetic field and the elastic force exerted by the elastic part 15, and the side oil outlet hole 103 of the crankshaft 10 is closed. The refrigerant oil in the oil pool flows upward under the action of centrifugal force, flows out from the oil outlet 102 at the top after being throttled 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 flows into the oil pool along the inner wall of the shell.

[0070] Fig. 9 Schematic diagram comparing the oil discharge rate of the compressor of the present invention and that of the conventional compressor. Fig. 9 As shown, at high frequencies, the oil discharge rate of the compressor of the present invention 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 invention further provides an air conditioner, which includes any of the above crankshaft assemblies; or includes the above pump assembly; or includes the above compressor. In the air conditioner, due to the use of the above crankshaft assembly, the movable part 16 can be driven to close the side oil outlet 103 when the compressor is running at high frequency, thereby preventing the side oil outlet 103 from discharging oil when the compressor is running at high frequency, preventing the oil from being carried out of the compressor by the exhaust flow, and further reducing the oil discharge rate of the compressor when it is running at high frequency.

[0072] Among them, the present invention arranges a limit plug 17, a movable part 16, an elastic part 15 and an oil plug in the crankshaft 10. When the compressor runs at a high frequency, the movable part 16 moves upward under the combined action of the magnetic pulling force exerted by the motor magnetic field and the elastic force exerted by the elastic part 15 to block 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 from the oil outlet 102 at the top after being throttled 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 returns to the oil pool along the inner wall of the shell, so that the refrigerant oil is prevented from being sprayed out from the side oil outlet hole 103 and being directly blown out of the compressor under the influence of the exhaust flow, thereby 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 the heat exchange performance of the air-conditioning system, and improving the user experience.

[0073] Among them, the present invention solves the problem of too high oil discharge rate of the compressor when it runs at high frequency, and also solves the problem of lack of oil in the compressor causing parts wear and poor compressor reliability when the compressor runs at high frequency; it also solves the problem of poor heat exchange performance of the air-conditioning system when the compressor runs at high frequency.

[0074] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A crankshaft assembly, characterized in that: The invention comprises a crankshaft (10), a movable part (16) and a driving mechanism, wherein the crankshaft (10) is driven by a motor assembly (21) to rotate, and the crankshaft (10) has a central oil hole (100) and a side oil outlet hole (103) connected to the central oil hole (100); At least a portion of the movable part (16) is made of magnetic material, and the movable part (16) is located in the magnetic field of the motor component (21) so as to be subjected to the magnetic pulling force exerted by the magnetic field of the motor component (21); The driving mechanism cooperates with the magnetic pulling force to drive the movable part (16) to move to the first position when the compressor is running at a high frequency, so as to close the side oil outlet hole (103).

2. The crankshaft assembly according to claim 1, characterized in that: The driving mechanism and the magnetic pulling force also cooperate to drive the movable part (16) to move to a second position when the compressor is running at a low frequency, so as to open the side oil outlet hole (103).

3. The crankshaft assembly according to claim 2, characterized in that: The movable member (16) is arranged in the central oil hole (100), and the movable member (16) is used to move to the first position and the second position along the center line direction of the central oil hole (100).

4. The crankshaft assembly according to any one of claims 1 to 3, characterized in that: The driving mechanism comprises an elastic member (15), and the driving mechanism drives the movable member (16) to move by the cooperation between the elastic member (15) and the magnetic pulling force.

5. The crankshaft assembly according to claim 4, characterized in that: When the movable member (16) is disposed in the central oil hole (100), and the movable member (16) is used to move to the first position and the second position along the center line direction of the central oil hole (100), the elastic member (15) is also disposed in the central oil hole (100), and the elastic member (15) and the movable member (16) are arranged in sequence along the center line direction of the central oil hole (100); wherein, A first limiting structure is also provided in the central oil hole (100), and the first limiting structure is located on the side of the elastic member (15) away from the movable member (16), and the first limiting structure is used to stop and limit the end (15a) of the elastic member away from the movable member; and / or a second limiting structure is also provided in the central oil hole (100), and the second limiting structure is located on the side of the movable member (16) away from the elastic member (15), and the second limiting structure is used to stop and limit the end of the movable member (16) away from the elastic member (15).

6. The crankshaft assembly according to claim 5, characterized in that: When a first limiting structure is further provided in the central oil hole (100), an end (15a) of the elastic member that faces away from the movable member is kept in contact with the first limiting structure; And / or, one end (15b) of the elastic member close to the movable member is in contact with the movable member (16).

7. The crankshaft assembly according to claim 5 or 6, characterized in that: When a second limiting structure is further provided in the central oil hole (100), the movable member (16) abuts against the second limiting structure when in the second position; the movable member (16) is away from the second limiting structure when in the first position and squeezes the elastic member (15), causing the elastic member (15) to be compressed and deformed.

8. The crankshaft assembly according to any one of claims 1-3, 5-6, 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); Wherein, the crankshaft assembly further comprises a throttling device (14), and the throttling device (14) is used to throttle the oil flowing out of the oil outlet hole.

9. The crankshaft assembly according to claim 8, characterized in that: When the first limiting structure is provided 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); wherein a clamping platform (151) is formed at the connection between the first section (10a) and the second section (10b), and the clamping platform (151) forms the first limiting structure; And / or, when a second limiting structure is provided in the central oil hole (100), the second limiting structure comprises a limiting plug (17), and the second limiting structure stops and limits the end of the movable part (16) away from the elastic part (15) through the limiting plug (17); wherein the limiting plug (17) is provided with a first liquid outlet (171) for the oil in the central oil hole (100) to flow; And / or, when the movable part (16) is disposed in the central oil hole (100), the movable part (16) is provided with a second fluid hole (161) for the oil in the central oil hole (100) to flow.

10. A pump assembly, characterized in that: A crankshaft assembly comprising any one of claims 1-9.

11. A compressor, characterized in that: A crankshaft assembly comprising any one of claims 1 to 9; or a pump body assembly comprising the pump body assembly described in claim 10.

12. An air conditioner, characterized in that: The invention comprises the crankshaft assembly according to any one of claims 1 to 9; or comprises the pump body assembly according to claim 10; or comprises the compressor according to claim 11.

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