阅读说明：本技术 供油组件、压缩机及控制方法 (Oil supply assembly, compressor and control method ) 是由 吴禄 李建宾 赵旭敏 李运飞 于 2021-10-18 设计创作，主要内容包括：本发明提供了一种供油组件、压缩机及控制方法,供油组件包括风扇,风扇被配置为能够根据压缩机电机的实时转速调节曲轴中心油孔两端的压差,使曲轴中心油孔在压缩机电机运行时能正常上油。解决压缩机的供油组件的风扇的转速和压缩机的曲轴转动的转速一致,供油量受曲轴转速限制而导致压缩机在运行时供油不畅的技术问题,拓宽压缩机电机的转速范围,另一方面也能降低压缩机的吐油率。(The invention provides an oil supply assembly, a compressor and a control method. The technical problem that the rotation speed of a fan of an oil supply assembly of the compressor is consistent with the rotation speed of a crankshaft of the compressor, and the oil supply amount is limited by the rotation speed of the crankshaft, so that the oil supply of the compressor is not smooth during operation is solved, the rotation speed range of a motor of the compressor is widened, and the oil discharge rate of the compressor can be reduced.)

1. An oil supply assembly, characterized in that the oil supply assembly (10) comprises a fan (12), the fan (12) is configured to adjust a pressure difference between two ends of a crankshaft center oil hole (212) of a crankshaft (21) according to a real-time rotating speed of a compressor motor (30), so that the crankshaft center oil hole (212) can be normally oiled when the compressor motor (30) operates.

2. The oil supply assembly according to claim 1, characterized in that the oil supply assembly (10) further comprises: the oil hole structure comprises a fan motor (11) and a support frame (13), wherein the crankshaft center oil hole (212) is provided with a first port and a second port, the support frame (13) fixes the fan motor (11) at one side close to the first port of the crankshaft center oil hole (212), the fan (12) faces the first port of the crankshaft center oil hole (212), and the fan motor (11) can adjust the rotating speed of the fan (12) according to the real-time rotating speed of the compressor motor (30).

3. The oil supply assembly according to claim 2, wherein the support frame (13) comprises a first bearing mounting cavity (131), a fan motor mounting cavity (132), a fan motor lead outlet (133) and a leg (134), and the leg (134) is fixed with an inner wall of a shell (40) of the compressor.

4. The oil supply assembly of claim 3, wherein the fan motor (11) comprises a second stator (111) and a second rotor (112), the second stator (111) is of a hollow structure, the outer wall of the second stator (111) is fixedly arranged in the fan motor mounting cavity (132), the second rotor (112) is arranged in the second stator (111), and the second stator (111) drives the second rotor (112) to make a rotary motion around the axis when being connected with a power supply.

5. The oil supply assembly according to claim 4, characterized in that the oil supply assembly (10) further comprises: fan shaft (14) and bearing frame (15), bearing frame (15) fixed mounting be in on support frame (13), second rotor (112) cover is established on fan shaft (14), bearing frame (15) have second bearing installation cavity (151), equal fixed mounting bearing (16) in first bearing installation cavity (131) and the second bearing installation cavity (151), the both ends of fan shaft (14) are worn to establish respectively in bearing (16), fan (12) are fixed on fan shaft (14).

6. The oil supply assembly according to claim 5, characterized in that the fan shaft (14) is arranged coaxially with the crankshaft (21).

7. Oil supply assembly according to claim 2, characterized in that the fan (12) comprises

And at least one blade (121), wherein one side of the blade (121) faces to a first port of the crankshaft central oil hole (212), and when the fan (12) rotates, the diameter of a circle formed by one end, close to the axis of the fan (12), of the blade (121) is larger than that of the crankshaft (21).

8. Oil supply assembly according to claim 2, characterized in that the real-time rotational speed of the compressor motor (30) is defined as W₁The real-time rotating speed of the fan motor (11) is W₂The lowest rotating speed of the fan motor (11) which meets the requirement of normal oil supply of the crankshaft central oil hole (212) is W₃The fan motor (11) has a rotation speed W which satisfies the minimum oil discharge rate₄。

9. The oil supply assembly of claim 8, wherein when said W is₁＜W₃Satisfy the W₂≥W₃And at the moment, the crankshaft center oil hole (212) can be oiled normally.

10. The oil supply unit according to claim 9, wherein the 15rps ≧ W is satisfied₂≥W₃And at the moment, the crankshaft center oil hole (212) can be oiled normally.

11. The oil supply assembly of claim 8, wherein when said W is₁≥W₃W is as described₁≥W₂＝W₄≥W₃And at the moment, the crankshaft center oil hole (212) can be oiled normally, and the oil spitting rate is minimum.

12. A compressor comprising an oil supply assembly as claimed in any one of claims 1 to 11.

13. The compressor of claim 14, further comprising a housing (40), a compressor motor (30), and a pump body assembly (20), wherein the oil supply assembly (10), the compressor motor (30), and the pump body assembly (20) are sequentially disposed from one end to the other end in the housing (40), and an oil sump (41) is disposed in the housing (40).

14. The compressor of claim 13, wherein the compressor motor (30) comprises a first stator (31) and a first rotor (32), the first stator (31) is of a hollow structure, an outer wall of the first stator (31) is fixedly arranged on an inner wall of the housing (40), the first rotor (32) is arranged in the first stator (31), and the first stator (31) drives the first rotor (32) to make a rotary motion around an axis thereof when being connected with a power supply.

15. The compressor of claim 14, wherein the pump body assembly (20) includes a crankshaft (21), the crankshaft (21) has a crankshaft center oil hole (212) axially penetrating through itself, the crankshaft center oil hole (212) has a plurality of oil supply holes (211), the plurality of oil supply holes (211) communicate the crankshaft center oil hole (212) with the pump body assembly (20), a second port of the crankshaft center oil hole (212) communicates with the oil sump (41) through an oil suction pipe (42), and the first rotor (32) is sleeved on an end of the crankshaft (21) close to the first port of the crankshaft center oil hole (212).

16. The compressor according to claim 14, wherein an end of the crankshaft (21) near the vane (121) does not extend beyond an end of the first rotor (32), and an end of the first rotor (32) near the vane (121) is spaced a predetermined distance from the vane (121).

17. A control method of a compressor according to any one of claims 13 to 16, comprising:

a detection step: detecting a real-time rotational speed of the compressor motor (30) as W₁；

A judging step: according to the real-time rotating speed W of the compressor motor (30)₁Adjusting the real-time rotation speed of the fan motor (11) to W₂；

The control steps are as follows: when said W is₁＜W₃Control W₂≥W₃And at the moment, the crankshaft center oil hole (212) can be oiled normally.

18. The control method according to claim 17, wherein W2 is controlled so that 15rps ≧ W₂≥W₃At this time, the curveThe shaft center oil hole (212) can be oiled normally.

19. The control method according to claim 17, wherein when said W is in said control step₁≥W₃Controlling W2 so that W₁≥W₂＝W₄≥W₃And at the moment, the crankshaft center oil hole (212) can be oiled normally, and the oil spitting rate is minimum.

Technical Field

The invention belongs to the technical field of compressors, and particularly relates to an oil supply assembly, a compressor and a control method.

Background

The fan rotating speed of an oil supply assembly of an existing rolling rotor compressor is consistent with the rotating speed of a crankshaft of the compressor, the oil supply amount is limited by the rotating speed of the crankshaft, the requirement of ultralow-rotating-speed operation of the compressor is met in the market, for example, a new energy automobile air conditioner with whole automobile heat management is considered, when only a power battery needs to be cooled under certain conditions of certain automobile types, the required refrigerating capacity is very low, the difference with the required refrigerating capacity in full-load operation is large, the working rotating speed of a compressor motor at the moment even only needs 5rps, the minimum working rotating speed of the existing compressor motor generally requires more than 10rps, the oiling is difficult when the minimum working rotating speed is lower than 10rps, and the risk of poor lubrication exists. In addition, the oil discharge rate of the existing compressor is increased faster along with the increase of the rotating speed of the motor of the compressor, and an oil separation device needs to be additionally added to reduce the oil discharge rate, so that the power consumption of the compressor is increased.

Disclosure of Invention

Therefore, the invention provides an oil supply assembly, a compressor and a control method, aiming at solving the technical problems that the rotating speed of a fan of the oil supply assembly of the compressor is consistent with the rotating speed of a crankshaft of the compressor, and the oil supply amount is limited by the rotating speed of the crankshaft, so that the oil supply of the compressor is not smooth during operation.

In order to solve the above problems, the present invention provides an oil supply assembly, which includes a fan configured to adjust a pressure difference between two ends of a crankshaft center oil hole of a crankshaft according to a real-time rotation speed of a compressor motor, so that the crankshaft center oil hole can be normally oiled when the compressor motor operates.

In some embodiments, the oil supply assembly further comprises: fan motor and support frame, bent axle center oilhole have first port and second port, and the support frame is fixed fan motor in the one side of the first port that is close to bent axle center oilhole, and the fan is towards the first port of bent axle center oilhole, and fan motor can be according to compressor motor's real-time rotational speed regulation fan speed.

In some embodiments, the support bracket includes a first bearing mounting cavity, a fan motor lead outlet, and a leg secured to an inner wall of a housing of the compressor.

In some embodiments, the fan motor includes a second stator, a second rotor and a fan shaft, the second stator is a hollow structure, an outer wall of the second stator is fixedly disposed in the fan motor mounting cavity, the second rotor is disposed in the second stator, and the second stator drives the second rotor to make a rotary motion around its axis when being connected to a power supply.

In some embodiments, the oil supply assembly further comprises: fan shaft and bearing frame, bearing frame fixed mounting are on the support frame, and the second rotor cover is established at the fan epaxially, and the bearing frame has the second bearing installation cavity, the equal fixed mounting bearing in first bearing installation cavity and the second bearing installation cavity, and in the bearing was worn to establish respectively at the both ends of fan shaft, the fan was fixed at the fan epaxially.

In some embodiments, the fan shaft is disposed coaxially with the crankshaft.

In some embodiments, the fan includes at least one blade, one side of the blade faces the first port of the crankshaft center oil hole, and the diameter of a circle formed by one end of the blade close to the fan axis is larger than that of the crankshaft when the fan rotates.

In some embodiments, the real-time speed of the compressor motor is defined as W₁The real-time rotating speed of the fan motor is W₂The minimum rotating speed of the fan motor for meeting the requirement of normal oil supply of the central oil hole of the crankshaft is W₃The fan motor meets the condition that the rotating speed with the minimum oil-spraying rate is W₄。

In some embodiments, when W is said₁＜W₃Satisfy the W₂≥W₃And at the moment, the oil hole in the center of the crankshaft can be oiled normally.

In some embodiments, the 15rps ≧ W is satisfied₂≥W₃And at the moment, the oil hole in the center of the crankshaft can be oiled normally.

In some embodiments, when W is said₁≥W₃W is as described₁≥W₂＝W₄≥W₃And at the moment, the oil can be normally applied to the central oil hole of the crankshaft, and the oil output rate is minimum.

The invention also provides a compressor, which comprises the oil supply assembly.

In some embodiments, the oil pump further comprises a shell, a compressor motor and a pump body assembly, wherein the oil supply assembly, the compressor motor and the pump body assembly are sequentially arranged in the shell from one end to the other end, and an oil pool is arranged in the shell.

In some embodiments, the compressor motor includes a first stator and a first rotor, the first stator is a hollow structure, an outer wall of the first stator is fixedly disposed on an inner wall of the housing, the first rotor is disposed in the first stator, and the first stator drives the first rotor to rotate around an axis of the first rotor when the first stator is connected to the power supply.

In some embodiments, the pump body assembly includes a crankshaft, the crankshaft has a crankshaft center oil hole axially penetrating through the crankshaft center oil hole, the crankshaft center oil hole has a plurality of oil supply holes, the plurality of oil supply holes communicate the crankshaft center oil hole with the pump body assembly, a second port of the crankshaft center oil hole communicates with the oil sump through an oil suction pipe, and the first rotor is sleeved at one end of the crankshaft close to the first port of the crankshaft center oil hole.

In some embodiments, the end of the crankshaft proximate the blades does not extend beyond the end of the first rotor, the end of the first rotor proximate the blades being spaced a predetermined distance from the blades.

The present invention also provides a method for controlling the compressor, including:

a detection step: detecting that the real-time rotation speed of the compressor motor is W₁；

A judging step: according to the real-time rotating speed W of the compressor motor₁Adjusting the real-time rotation speed of the fan motor to W₂；

The control steps are as follows: when said W is₁＜W₃Control W₂≥W₃And at the moment, the oil hole in the center of the crankshaft can be oiled normally.

In some embodiments, W2 is controlled such that 15rps ≧ W₂≥W₃When the crankshaft center oil is inThe hole can be oiled normally.

In some embodiments, when W is in the controlling step₁≥W₃Controlling W2 so that W₁≥W₂＝W₄≥W₃And at the moment, the oil can be normally applied to the central oil hole of the crankshaft, and the oil output rate is minimum.

The oil supply assembly provided by the invention at least has the following beneficial effects:

the invention provides an oil supply assembly, a compressor and a control method. The technical problem that the rotation speed of a fan of an oil supply assembly of the compressor is consistent with the rotation speed of a crankshaft of the compressor, and the oil supply amount is limited by the rotation speed of the crankshaft, so that the oil supply of the compressor is not smooth during operation is solved, the rotation speed range of a motor of the compressor is widened, and the oil discharge rate of the compressor can be reduced.

On the other hand, the compressor and the control method provided by the present invention are designed based on the oil supply assembly, and the beneficial effects thereof refer to the beneficial effects of the oil supply assembly, which are not described herein again.

Drawings

Fig. 1 is a sectional view of a compressor according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of an oil supply assembly according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a supporting frame according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a supporting frame according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a bearing seat according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a bearing seat according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a fan according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a fan according to an embodiment of the present invention;

the reference numerals are represented as:

10. an oil supply assembly; 11. a fan motor; 111. a second stator; 112. a second rotor; 12. a fan; 121. a blade; 13. a support frame; 131. a first bearing mounting cavity; 132. a fan motor mounting cavity; 133. a fan motor lead outlet; 134. a support leg; 14. a fan shaft; 15. a bearing seat; 151. a second bearing mounting cavity; 16. a bearing; 20. a pump body assembly; 21. a crankshaft; 211. an oil supply hole; 212. a crankshaft center oil hole; 30. a compressor motor; 31. a first stator; 32. a first rotor; 40. a housing; 41. an oil sump; 42. an oil suction pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 8, the present invention provides an oil supply assembly, wherein the oil supply assembly 10 includes a fan 12, and the fan 12 is configured to adjust a pressure difference between two ends of a crankshaft center oil hole 212 of a crankshaft 21 according to a real-time rotation speed of a compressor motor 30, so that the crankshaft center oil hole 212 can be normally oiled when the compressor motor 30 operates.

The fan 12 of the oil supply assembly 10 of the present embodiment is configured to adjust the pressure difference across the crankshaft center oil hole 212 according to the real-time rotation speed of the compressor motor 30, so that the crankshaft center oil hole 212 can be oiled normally when the compressor motor 30 is in operation. The technical problem that the rotating speed of the fan 12 of the oil supply assembly 10 of the compressor is consistent with the rotating speed of the crankshaft of the compressor, and the oil supply amount is limited by the rotating speed of the crankshaft, so that the oil supply of the compressor is not smooth during operation is solved, the rotating speed range of the motor 30 of the compressor is widened, and the oil discharge rate of the compressor can be reduced.

In some embodiments, the oil supply assembly 10 further comprises: the fan motor 11 and the supporting frame 13, the crankshaft center oil hole 212 has a first port and a second port, the supporting frame 13 fixes the fan motor 11 at a side close to the first port of the crankshaft center oil hole 212, the fan 12 faces the first port of the crankshaft center oil hole 212, and the fan motor 11 can adjust the rotating speed of the fan 12 according to the real-time rotating speed of the compressor motor 30.

The compressor motor 30 and the fan motor 11 of the embodiment are powered on to operate, the fan motor 11 drives the fan 12 to rotate, the fan 12 rotates to enable the first port of the crankshaft center oil hole to generate low pressure, the pressure of the second port of the crankshaft center oil hole 212 is higher than that of the first port of the crankshaft center oil hole 212, and the refrigerant oil flows from the second port of the crankshaft center oil hole 212 to the first port of the crankshaft center oil hole 212 under the action of pressure difference, so that parts of the compressor are lubricated through the crankshaft center oil hole 212 on the way. The low pressure generated by the rotation of the fan 12 is related to the rotation speed of the fan 12, and when the rotation speed of the fan 12 is too low, sufficient low pressure cannot be generated, and the refrigerant oil cannot enter the crankshaft center oil hole 212. Therefore, when the compressor motor 30 is operated at a low rotation speed (for example, less than 10rps), the rotation speed of the fan 12 is increased by the fan motor 11, so that the refrigeration oil flows from the second port of the crankshaft center oil hole 212 to the first port of the crankshaft center oil hole 212 under the action of the pressure difference, and parts of the compressor are lubricated by the crankshaft center oil hole 212 in the process. The oil discharge rate of the compressor is reduced by reducing the rotation speed of the fan 12 by the fan motor 11 when the compressor motor 30 is operated at a high rotation speed.

In some embodiments, the support bracket 13 includes a first bearing mounting cavity 131, a fan motor mounting cavity 132, a fan motor lead outlet 133, and a leg 134, the leg 134 being fixed to an inner wall of the casing 40 of the compressor.

The supporting bracket 13 of this embodiment includes a first bearing mounting cavity 131, a fan motor mounting cavity 132, a fan motor lead outlet 133 and a leg 134, and the leg 134 is fixed to the inner wall of the casing 40 of the compressor. The installation firmness of the oil supply assembly 10 is ensured, and the working stability of the oil supply assembly 10 is improved.

In some embodiments, the fan motor 11 includes a second stator 111 and a second rotor 112, the second stator 111 is a hollow structure, an outer wall of the second stator 111 is fixedly disposed in the fan motor mounting cavity 132, the second rotor 112 is disposed in the second stator 111, and the second stator 111 drives the second rotor 112 to perform a rotation motion around its axis when receiving a power supply.

The fan motor 11 of the present embodiment includes a second stator 111 and a second rotor 112, the second stator 111 is a hollow structure, an outer wall of the second stator 111 is fixedly disposed in the fan motor mounting cavity 132, the second rotor 112 is disposed in the second stator 111, when the second stator 111 is powered on, the second rotor 112 is driven to rotate around its own axis, and further the fan 12 is driven to rotate, so as to adjust a pressure difference between two ends of the crankshaft center oil hole 212 of the crankshaft 21, when the compressor motor 30 is in a low-speed operation (for example, lower than 10rps), the rotation speed of the fan 12 is increased by the fan motor 11, so that the refrigerant oil flows from the second port of the crankshaft center oil hole 212 to the first port of the crankshaft center oil hole 212 under the action of the pressure difference, and the components of the compressor are lubricated through the crankshaft center oil hole 212. The oil discharge rate of the compressor is reduced by reducing the rotation speed of the fan 12 by the fan motor 11 when the compressor motor 30 is operated at a high rotation speed.

In some embodiments, the oil supply assembly 10 further comprises: fan shaft 14 and bearing frame 15, bearing frame 15 fixed mounting is on support frame 13, and second rotor 112 cover is established on fan shaft 14, and bearing frame 15 has second bearing installation cavity 151, and equal fixed mounting bearing 16 in first bearing installation cavity 131 and the second bearing installation cavity 151, the both ends of fan shaft 14 are worn respectively to establish in bearing 16, and fan 12 is fixed on fan shaft 14.

The oil supply unit 10 of the present embodiment further includes: fan shaft 14 and bearing frame 15, bearing frame 15 fixed mounting is on support frame 13, and second rotor 112 cover is established on fan shaft 14, and bearing frame 15 has second bearing installation cavity 151, and equal fixed mounting bearing 16 in first bearing installation cavity 131 and the second bearing installation cavity 151, the both ends of fan shaft 14 wear to establish respectively in bearing 16, and fan 12 is fixed on fan shaft 14. The fan 12 is driven by the fan shaft 14 to rotate, the pressure difference between two ends of the crankshaft center oil hole 212 of the crankshaft 21 is adjusted, when the compressor motor 30 is in low-speed operation (for example, lower than 10rps), the rotating speed of the fan 12 is increased by the fan motor 11, so that the refrigerant oil flows from the second port of the crankshaft center oil hole 212 to the first port of the crankshaft center oil hole 212 under the action of the pressure difference, and parts of the compressor are lubricated through the crankshaft center oil hole 212 on the way. The oil discharge rate of the compressor is reduced by reducing the rotation speed of the fan 12 by the fan motor 11 when the compressor motor 30 is operated at a high rotation speed.

In some embodiments, fan shaft 14 is disposed coaxially with crankshaft 21. Ensuring the air draft effect of the fan 12.

In some embodiments, the fan 12 includes at least one blade 121, one side of the blade 121 faces the first port of the crankshaft center oil hole 212, and when the fan 12 rotates, the diameter of a circle formed by one end of the blade 121 close to the axis of the fan 12 is larger than the diameter of the crankshaft 21. Ensuring the air draft effect of the fan 12.

In some embodiments, the real-time speed of the compressor motor 30 is defined as W₁The real-time rotating speed of the fan motor 11 is W₂The minimum rotating speed of the fan motor 11 for meeting the requirement of normal oil supply of the crankshaft central oil hole 212 is W₃The fan motor 11 has a rotation speed W that satisfies the minimum oil discharge rate₄。

In some embodiments, when W is said₁＜W₃Satisfy the W₂≥W₃At the moment, the crankshaft center oil hole 212 can be oiled normally. And the pressure difference between two ends of the crankshaft center oil hole 212 is ensured to be established and oil supply and lubrication are ensured under the low rotating speed of the compressor motor 30.

In some embodiments, the 15rps ≧ W is satisfied₂≥W₃At the moment, the crankshaft center oil hole 212 can be oiled normally. And the pressure difference between two ends of the crankshaft center oil hole 212 is ensured to be established and oil supply and lubrication are ensured under the low rotating speed of the compressor motor 30.

In some embodiments, when W is said₁≥W₃W is as described₁≥W₂＝W₄≥W₃At the moment, the crankshaft center oil hole 212 can be oiled normally, and the oil spitting rate is minimum. The oil supply and lubrication requirements are guaranteed, and the oil discharge rate is minimum.

The invention also provides a compressor, which comprises the oil supply assembly.

In some embodiments, the pump body assembly 20 further includes a casing 40, a compressor motor 30, and the oil supply assembly 10, the compressor motor 30, and the pump body assembly 20 are sequentially disposed from one end to the other end in the casing 40, and an oil sump 41 is disposed in the casing 40.

In some embodiments, the compressor motor 30 includes a first stator 31 and a first rotor 32, the first stator 31 is a hollow structure, an outer wall of the first stator 31 is fixedly disposed on an inner wall of the housing 40, the first rotor 32 is disposed in the first stator 31, and the first stator 31 drives the first rotor 32 to make a rotation motion around its axis when the first stator 31 is powered on.

In some embodiments, the pump body assembly 20 includes a crankshaft 21, the crankshaft 21 has a crankshaft center oil hole 212 axially penetrating through the crankshaft 21, the crankshaft center oil hole 212 has a plurality of oil supply holes 211, the plurality of oil supply holes 211 communicate the crankshaft center oil hole 212 with the pump body assembly 20, a second port of the crankshaft center oil hole communicates with the oil sump 41 through an oil suction pipe 42, and the first rotor 32 is disposed at an end of the crankshaft 21 close to the first port of the crankshaft center oil hole 212.

The pump body assembly 20 of the present embodiment includes a crankshaft 21, the crankshaft 21 has a crankshaft center oil hole 212 axially penetrating through the crankshaft 21, the crankshaft center oil hole 212 has a plurality of oil supply holes 211, the plurality of oil supply holes 211 communicate the crankshaft center oil hole 212 with the pump body assembly 20, a second port of the crankshaft center oil hole communicates with an oil sump 41 through an oil suction pipe 42, and the first rotor 32 is sleeved on an end of the crankshaft 21 near the first port of the crankshaft center oil hole 212.

The compressor motor 30 and the fan motor 11 are powered on to operate to drive the crankshaft 21 and the fan shaft 14 to rotate, the fan shaft 14 drives the fan 12 to rotate, the fan 12 rotates to enable the first port of the crankshaft center oil hole 212 to generate low pressure, the pressure of the second port of the crankshaft center oil hole 212 is higher than that of the first port of the crankshaft center oil hole 212, the refrigeration oil in the oil pool 41 flows to the first port of the crankshaft center oil hole 212 from the second port of the crankshaft center oil hole 212 under the action of pressure difference, and the pump body assembly 20 and other parts are lubricated through the oil supply holes 211 communicated with the crankshaft center oil hole 212 in the process. The low pressure generated by the rotation of the fan 12 is related to the rotation speed of the fan 12, and when the rotation speed of the fan 12 is too low, sufficient low pressure cannot be generated, and the refrigerant oil cannot enter the crankshaft center oil hole 212. Therefore, when the compressor motor 30 is operated at a low speed (e.g., less than 10rps), the rotation speed of the fan 12 is increased by the fan motor 11, so that the refrigerant oil flows from the second port of the crankshaft center oil hole 212 to the first port of the crankshaft center oil hole 212 under the action of the pressure difference, and the pump body assembly 20 and other parts are lubricated by the oil supply holes 211 communicated with the crankshaft center oil hole 212. The oil discharge rate of the compressor is reduced by reducing the rotation speed of the fan 12 by the fan motor 11 when the compressor motor 30 is operated at a high rotation speed.

In some embodiments, the end of the crankshaft 21 near the blades 121 does not extend beyond the end of the first rotor 32, and the end of the first rotor 32 near the blades 121 is spaced a predetermined distance from the blades 121. Ensuring the air draft effect of the fan 12.

The core of the present invention lies in the controllable rotating speed of the fan 12 and the control logic thereof, and equivalent changes of the embodiments, such as changes of the shape and the installation method of the supporting frame 13, changes of the type of the bearing 16 (rolling bearing and sliding bearing), changes of the shape and the installation method of the bearing seat 15, changes of the shape and the installation method of the fan 12, etc., are all within the protection scope.

The present invention also provides a method for controlling the compressor, including:

a detection step: detecting the real-time rotational speed of the compressor motor 30 as W₁；

A judging step: according to the real-time rotating speed W of the compressor motor 30₁Adjusting the real-time rotation speed of the fan motor 11 to W₂；

The control steps are as follows: when said W is₁＜W₃Control W₂≥W₃At the moment, the crankshaft center oil hole 212 can be oiled normally. And the pressure difference between two ends of the crankshaft center oil hole 212 is ensured to be established and oil supply and lubrication are ensured under the low rotating speed of the compressor motor 30.

In some embodiments, the 15rps ≧ W is satisfied at the control step₂≥W₃At the moment, the crankshaft center oil hole 212 can be oiled normally. And the pressure difference between two ends of the crankshaft center oil hole 212 is ensured to be established and oil supply and lubrication are ensured under the low rotating speed of the compressor motor 30.

In some embodiments, when W is in the controlling step₁≥W₃Controlling W2 so that W₁≥W₂＝W₄≥W₃At the moment, the crankshaft center oil hole 212 can be oiled normally, and the oil spitting rate is minimum. The oil supply and lubrication requirements are guaranteed, and the oil discharge rate is minimum.

Those skilled in the art will readily appreciate that features of the above described modes may be freely combined, superimposed without conflict.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.