CN212343579U - Stator assembly and rotary compressor - Google Patents

Abstract

The utility model relates to a compressor technical field provides a stator module and rotary compressor. The stator assembly includes: the stator core is provided with a plurality of windings in the circumferential direction, adjacent windings are spaced through insulating limit parts, and a winding gap is formed between the insulating limit parts of the adjacent windings; the heat pipe assembly comprises an evaporation section and a condensation section, wherein the evaporation section extends into the winding gap from the end face of the stator core, the condensation section extends out of the periphery of the stator core, and the extension direction of the evaporation section and the extension direction of the condensation section form a U shape. The utility model discloses an evaporation zone of heat pipe subassembly stretches into the winding clearance from stator core's terminal surface, and the condensation segment stretches out in stator core's periphery, forms the heat pipe subassembly of the U type that has super high heat conduction characteristic, realizes in time discharging the calorific capacity of winding and stator core's heat to the motor outside to reduce motor temperature, improve motor efficiency, and then improve rotary compressor's complete machine efficiency.

Description

Stator assembly and rotary compressor

Technical Field

The utility model relates to a compressor technical field, specifically speaking relates to a stator module and rotary compressor including this stator module.

Background

In the compressor field, the high-rotation-speed application of the variable frequency compressor is more and more, the temperature of the motor is continuously increased, the efficiency of the motor is influenced, and the overall energy efficiency of the compressor is further influenced.

Therefore, research on a heat management technology of a motor of the compressor is urgently needed to reduce the influence of the temperature rise of the motor on the efficiency of the motor and the overall energy efficiency of the compressor.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present invention and therefore may include information that does not constitute prior art known to a person of ordinary skill in the art.

SUMMERY OF THE UTILITY MODEL

To the problem among the prior art, the utility model provides a stator module and rotary compressor including this stator module utilizes heat pipe technique to reduce the motor temperature rise, improves motor efficiency and rotary compressor's complete machine efficiency.

According to an aspect of the present invention, there is provided a stator assembly, comprising: the stator core is provided with a plurality of windings in the circumferential direction, adjacent windings are spaced through insulating limit parts, and a winding gap is formed between the insulating limit parts of the adjacent windings; the heat pipe assembly comprises an evaporation section and a condensation section, wherein the evaporation section extends into the winding gap from the end face of the stator core, the condensation section extends out of the periphery of the stator core, and the extension direction of the evaporation section and the extension direction of the condensation section form a U shape.

In some embodiments, the evaporation section includes an annular manifold and a plurality of flat micro heat pipes, the annular manifold is disposed on an end surface of the stator core, and the plurality of flat micro heat pipes extend perpendicular to the annular manifold and into the winding gaps, respectively.

In some embodiments, the condensation section extends from an outer periphery of the annular manifold and extends from an outer periphery of the stator core perpendicular to the annular manifold.

In some embodiments, an end face of the annular manifold abuts an end face of the stator core; and two flat surfaces of the flat micro heat pipe are respectively attached to the adjacent insulation limiting parts of the windings, so that in each winding gap, surface contact is respectively formed between the flat micro heat pipe and the insulation limiting parts and between the insulation limiting parts and the windings.

In some embodiments, the flat micro heat pipe extends along a central axis of the stator core to a height that is the same as a height of the winding.

In some embodiments, along the central axis of the stator core, a plurality of the flat micro heat pipes are distributed in a central symmetry manner.

In some embodiments, the pipe diameter of the annular manifold is equal to or greater than the pipe diameter of the condensation section.

In some embodiments, the heat pipe assembly is a gravity heat pipe, the flat micro heat pipe and the condensation section respectively extend upwards perpendicular to the annular manifold, the extension height of the condensation section is higher than that of the flat micro heat pipe, and a heat transfer medium in the heat pipe assembly flows back from the condensation section to the evaporation section under the action of gravity.

In some embodiments, a liquid absorption core is arranged on the pipe wall of the heat pipe assembly, the capillary suction force of the liquid absorption core of the flat micro heat pipe is greater than that of the liquid absorption core of the annular main pipe, and the heat transfer medium in the heat pipe assembly flows back from the condensation section to the evaporation section under the action of the capillary suction force of the liquid absorption core.

According to another aspect of the present invention, there is provided a rotary compressor comprising the stator assembly of any of the above embodiments; and the stator core and the evaporation section of the heat pipe assembly are contained in the shell, and the condensation section of the heat pipe assembly extends out of the shell.

Compared with the prior art, the utility model beneficial effect include at least:

the evaporation section of the heat pipe assembly extends into the winding gap from the end face of the stator core, and the condensation section extends out of the periphery of the stator core to form the U-shaped heat pipe assembly with ultrahigh heat conduction property, so that the heat productivity of the winding and the heat of the stator core are timely discharged to the outside of the motor, the temperature of the motor is reduced, the efficiency of the motor is improved, and the overall energy efficiency of the rotary compressor is improved;

when the stator component is assembled to the rotary compressor, the condensation section of the heat pipe component extends out of the shell of the rotary compressor, so that the heat of the motor is timely conducted to the outside of the rotary compressor;

in addition, the temperature rise of the motor is reduced, so that the exhaust temperature of the rotary compressor can be further reduced, and the load of an air-conditioning condenser is reduced; and the temperature of the mixture of the refrigerant and the lubricating oil in the back pressure cavity of the rotary compressor can be further reduced, so that the heating quantity of the outside of the cylinder is reduced, and the indicating efficiency and the whole machine energy efficiency of the rotary compressor are improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 shows a schematic perspective view of a stator assembly in an embodiment of the present invention;

fig. 2 shows a schematic cross-sectional structure diagram of a stator assembly in an embodiment of the present invention;

fig. 3 shows a schematic perspective view of a heat pipe assembly in an embodiment of the present invention; and

fig. 4 shows a schematic sectional structure diagram of a heat pipe assembly in an embodiment of the present invention.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

Fig. 1 illustrates a perspective structure of a stator assembly in an embodiment, fig. 2 illustrates a sectional structure of the stator assembly, fig. 3 illustrates a perspective structure of a heat pipe assembly, and fig. 4 illustrates a sectional structure of the heat pipe assembly. As shown in fig. 1 to 4, the stator assembly of the present embodiment mainly includes: the stator comprises a stator core 1, wherein a plurality of windings 11 are circumferentially distributed on the inner periphery of the stator core 1, adjacent windings 11 are spaced by insulation limiting parts, and a winding gap 110 is formed between the insulation limiting parts of the adjacent windings 11; the heat pipe assembly 2 includes an evaporation section 21 extending into the winding gap 110 from the end surface of the stator core 1 and a condensation section 22 extending out of the periphery of the stator core 1, and the extension direction of the evaporation section 21 and the extension direction of the condensation section 22 form a U-shape.

The stator core 1 is formed into an annular structure, and has a plurality of stator teeth (not shown in detail) on an inner circumference thereof, and each stator tooth is wound with a coil to form a winding 11. The windings 11 are covered with insulation stoppers, such as plastic films, at least on the side surfaces thereof in the circumferential direction, so that adjacent windings 11 are spaced apart by the insulation stoppers. The insulation limiting parts realize insulation between adjacent windings 11 on one hand, and enable each winding 11 to be fixedly limited on the corresponding stator tooth on the other hand, and a winding gap 110 is formed between the insulation limiting parts of the adjacent windings 11.

The heat pipe assembly 2 is an internal closed circulation structure, and the inside is filled with a heat transfer medium such as water or glycol. The heat pipe assembly 2 makes use of the phase change process of the heat transfer medium condensed in the condensing section 22 after the evaporation section 21 evaporates, so that heat is rapidly conducted. The motor of the rotary compressor generates a large amount of heat when operating. Considering that the motor rotor has a high rotation speed and is difficult to introduce the heat pipe structure, the heat pipe assembly 2 is combined with the stator core 1 in the embodiment, and when the motor generates heat, the evaporation section 21 is heated, so that the heat transfer medium in the evaporation section 21 is rapidly vaporized, and the heat generated by the winding 11 and the heat generated by the stator core 1 are absorbed. The vaporized heat transfer medium flows to the condensing section 22, heat is released from the condensing section 22, and the liquid heat transfer medium flows back to the evaporating section 21, so that the circulation continuously conducts the heat generated by the winding 11 and the heat of the stator core 1.

Therefore, in the present embodiment, the evaporation section 21 extends into the winding gap 110 from the end surface of the stator core 1, and the condensation section 22 extends out of the periphery of the stator core 1, so as to form the U-shaped heat pipe assembly 2 with the ultrahigh heat conduction characteristic, so that the heat generated by the winding 11 and the heat generated by the stator core 1 are timely discharged to the outside of the motor, thereby reducing the temperature of the motor, increasing the power generation voltage of the motor, and improving the efficiency of the motor. The temperature rise of the motor is reduced, so that the exhaust temperature of the rotary compressor can be further reduced, and the load of an air conditioner condenser is reduced; and the temperature of the mixture of the refrigerant and the lubricating oil in the back pressure cavity of the rotary compressor can be further reduced, so that the heating quantity of the outside of the cylinder is reduced, and the indicating efficiency and the whole machine energy efficiency of the rotary compressor are improved.

In some embodiments, as shown in fig. 1 and fig. 3, the evaporation section 21 includes an annular manifold 211 and a plurality of flat micro heat pipes 212, the annular manifold 211 is disposed on an end surface of the stator core 1, and heat conduction of the stator core 1 is achieved; a plurality of flat micro heat pipes 212 respectively extend perpendicularly to the annular manifold 211, and each flat micro heat pipe 212 extends into the winding gap 110 between adjacent windings 11 to conduct the heat generated by the windings 11. The flat micro heat pipe 212 is disposed in the winding gap 110 between each two adjacent windings 11, so as to achieve a good heat conduction effect on the winding coil of the whole stator core 1. When the flat micro heat pipes 212 conduct the heat of the windings 11, the annular manifold 211 serves as an evaporation manifold of the flat micro heat pipes 212, the flat micro heat pipes 212 and the annular manifold 211 jointly serve as an evaporation section 21 of the heat pipe assembly 2, and meanwhile, the condensation section 22 extends out of the periphery of the stator core 1, so that the heat of the windings 11 and the heat of the stator core 1 are quickly conducted out of the stator assembly.

The winding gaps 110 at 9 are formed between the adjacent windings 11 of the stator core 1 shown in fig. 1, so that as shown in fig. 3, the evaporation section 21 of the heat pipe assembly 2 fitted to the stator core 1 shown in fig. 1 is provided with 9 flat micro heat pipes 212, the 9 flat micro heat pipes 212 are respectively inserted into the winding gaps 110 formed by the adjacent windings 11 at 9, and the 9 flat micro heat pipes 212 are respectively communicated with the annular manifold 211. In other embodiments, the evaporation section 21 of the heat pipe assembly 2 can be adaptively adjusted to adapt to stator cores 1 with different structures, as long as the annular manifold 211 is arranged on the end surface of the stator core 1, and the flat micro heat pipe 212 extends from the annular manifold 211 and extends into the winding gap 110 between the two windings 11, so as to achieve a good conduction effect on the heat generated by the windings 11 and the heat of the stator core 1.

The flat micro heat pipe 212 extends perpendicular to the annular manifold 211, so that on one hand, the integral structure of the formed evaporation section 21 is matched with the integral structure of the stator core 1, and the stator assembly has a stable structure; on the other hand, the heat transfer medium can flow smoothly between the flat micro heat pipe 212 and the annular manifold 211, and the heat generated by the winding 11 and the heat generated by the stator core 1 can be taken away quickly.

Further, the condensation section 22 of the heat pipe assembly 2 protrudes from the outer periphery of the annular manifold 211, and protrudes from the outer periphery of the stator core 1 perpendicularly to the annular manifold 211. The condensation section 22 and the evaporation section 21 form a U-shaped heat pipe assembly 2, the U-shaped heat pipe assembly 2 has a stable structure and ultrahigh heat conduction characteristics and is matched with the structure of the stator core 1, so that the heat pipe assembly 2 and the stator core 1 are stably assembled together, and the heat productivity of the winding 11 and the heat capacity of the stator core 1 are effectively conducted.

In some embodiments, the end surface of the annular manifold 211 is attached to the end surface of the stator core 1, that is, the end surface of the annular manifold 211 is in surface contact with the end surface of the stator core 1, so as to increase the contact area between the annular manifold 211 and the stator core 1, enhance the heat conduction effect, and enhance the structural matching stability. Two flat surfaces of the flat micro heat pipe 212 are respectively attached to the insulation limiting parts of the adjacent windings 11, so that in each winding gap 110, surface contact is respectively formed between the flat micro heat pipe 212 and the insulation limiting parts, and between the insulation limiting parts and the windings 11, so as to enhance the heat conduction effect of the flat micro heat pipe 212 on the windings 11, and enhance the structural matching stability. Thereby, the entire evaporation section 21 of the heat pipe assembly 2 can be stably fitted with the stator core 1 and the winding 11, and a good conduction effect of the heat generation amount of the winding 11 and the heat of the stator core 1 is achieved.

In some embodiments, to further enhance the structural fitting stability of the heat pipe assembly 2 and the stator core 1, and enhance the conduction effect of the heat pipe assembly 2 on the heat generation amount of the winding 11 and the heat of the stator core 1, the structure of the heat pipe assembly 2 may be further defined. For example, in one embodiment, considering that the initial gap between the two windings 11 is 1.4mm, and considering that a plastic film with a thickness of about 0.4mm, i.e., an insulation limiting member, exists in the initial gap 110, the flat micro heat pipe 212 with a thickness of 1mm is designed to extend into the winding gap 110 of the two windings 11, so that the flat micro heat pipe 212 can smoothly extend into the winding gap 110, and is in contact with the windings 11 through the insulation limiting member, and does not affect the windings 11. For another example, in one embodiment, the extension height of the flat micro heat pipe 212 is the same as the height of the winding 11 along the central axis of the stator core 1, so that the flat micro heat pipe 212 extends across the entire winding gap 110 area to maximize the conduction effect of the flat micro heat pipe 212 on the heat generation amount of the winding 11. For another example, in one embodiment, the plurality of flat micro heat pipes 212 are distributed in a central symmetrical manner along the central axis of the stator core 1. The plurality of flat micro heat pipes 212 are distributed in a centrosymmetric manner, so that the distribution structure of the flat micro heat pipes 212 can be adapted to the distribution structure of the windings 11, and the stable structure of the whole stator assembly can be realized after the heat pipe assembly 2 is assembled with the stator core 1. For another example, in one embodiment, the diameter of the annular manifold 211 is greater than or equal to that of the condensation section 22, so that the annular manifold 211 functions as a manifold for the plurality of flat micro heat pipes 212, and the heat transfer medium in the heat pipe assembly 2 smoothly flows between the flat micro heat pipes 212 and the condensation section 22 through the annular manifold 211.

Of course, in different embodiments, the evaporation section 21 and the condensation section 22 of the heat pipe assembly 2 can be adaptively adjusted as long as the heat pipe assembly can be adapted to the structure of the stator core 1 to achieve good conduction effects of the heat generated by the winding 11 and the heat of the stator core 1.

The heat pipe assembly 2 in each of the above embodiments may be a common heat pipe, and the heat transfer medium is driven to flow back by a wick disposed on a pipe wall; or a gravity suction pipe, and the heat transfer medium is refluxed by utilizing the gravity action.

For example, in some embodiments, the wall of the heat pipe assembly 2 is provided with a wick (not shown in detail), and the capillary suction force of the wick of the flat micro heat pipe 212 is greater than that of the wick of the annular manifold 211, and the heat transfer medium in the heat pipe assembly 2 flows back from the condensation section 22 to the evaporation section 21 under the capillary suction force of the wick. Specifically, the liquid absorption core is made of a capillary porous material, when the flat micro heat pipe 212 absorbs the heat generated by the winding 11, the liquid heat transfer medium in the flat micro heat pipe 212 is evaporated and vaporized to take away the heat of the winding 11, and the evaporated and vaporized heat transfer medium naturally flows from the hot end to the cold end of the heat pipe assembly 2, i.e., flows to the condensation section 22 through the annular header pipe 211; at the same time, the heat transfer medium in the annular manifold 211 is vaporized after absorbing the heat of the stator core 1 and flows to the condenser 22 by the pressure difference. Then, the heat transfer medium emits heat in the condensation section 22 and condenses into liquid, and the liquid heat transfer medium flows back to the annular manifold 211 and the flat micro heat pipe 212 along the capillary porous material under the action of capillary attraction, so that the circulation realizes that the heat of the winding 11 and the heat of the stator core 1 are transmitted to the condensation section 22 from the evaporation section 21. Since the flat micro heat pipes 212 extend vertically upward from the annular manifold 211, the capillary suction force of the wicks of the flat micro heat pipes 212 is greater than that of the wicks of the annular manifold 211, so that the liquid heat transfer medium can smoothly flow back from the condensation section 22 to the flat micro heat pipes 212 through the annular manifold 211. The capillary suction of the wicks of the annular manifold 211 may also be greater than the capillary suction of the wicks of the condenser section 22, further assisting in the return flow of the heat transfer medium.

For another example, in some embodiments, the heat pipe assembly 2 is a gravity heat pipe, the flat micro heat pipes 212 and the condensing section 22 respectively extend upward perpendicular to the annular manifold 211, and the extending height of the condensing section 22 is higher than that of the flat micro heat pipes 212, so that the heat transfer medium in the heat pipe assembly 2 flows back from the condensing section 22 to the evaporating section 21 under the action of gravity. Specifically, the annular manifold 211 is located at the bottom of the heat pipe assembly 2, and the extension height of the condensing section 22 is higher than that of the flat micro heat pipe 212, so that the backflow of the heat transfer medium located in the heat pipe assembly 2 from the condensing section 22 to the evaporating section 21 can be satisfied by gravity without a wick of a capillary structure.

In summary, the stator assembly described in the above embodiments forms a stator assembly based on a heat pipe technology by introducing the heat pipe assembly 2 into the stator core 1, so as to reduce the temperature rise of the motor by using the heat pipe technology, and improve the energy efficiency of the rotary compressor. Of course, the stator assemblies of the above embodiments also include other conventional structures, such as a rotor disposed on the inner periphery of the stator core 1, and will not be described in detail herein.

The embodiment of the utility model provides a rotary compressor is still provided, this rotary compressor includes the stator module described in above-mentioned arbitrary embodiment; and the stator core 1 in the stator assembly and the evaporation section 21 of the heat pipe assembly 2 are accommodated in the shell, and the condensation section 22 of the heat pipe assembly 2 extends out of the shell. That is, when the stator assembly is assembled to the rotary compressor, the condensing section 22 protrudes outside the casing of the rotary compressor, enabling heat of the motor to be conducted to the outside of the rotary compressor.

The rotary compressor of the embodiment can be suitable for refrigeration air conditioners such as air conditioners and refrigerators, and the heat pipe technology is utilized to discharge the heat of the motor to the outside of the rotary compressor, so that the energy efficiency of the whole machine is improved. Of course, the rotary compressor also includes other conventional components, such as a pump body structure, an accumulator structure, etc., which will not be described in detail herein.

To sum up, the utility model discloses an introduce the heat pipe technique in the stator structure of motor, stretch into winding clearance 110 with the evaporation zone 21 of heat pipe subassembly 2 from stator core 1's terminal surface, and condensation segment 22 stretches out in stator core 1's periphery, form the heat pipe subassembly 2 of the U type that has super high heat conduction characteristic, the realization is in time discharged winding 11's calorific capacity and stator core 1's heat to the motor outside, in order to reduce motor temperature, improve motor efficiency, and then improve rotary compressor's complete machine efficiency. When the stator assembly is assembled to the rotary compressor, the condensation section 22 of the heat pipe assembly 2 extends out of the shell of the rotary compressor, so that the heat of the motor is timely conducted to the outside of the rotary compressor. The temperature rise of the motor is reduced, so that the exhaust temperature of the rotary compressor can be further reduced, and the load of an air conditioner condenser is reduced; and the temperature of the mixture of the refrigerant and the lubricating oil in the back pressure cavity of the rotary compressor can be further reduced, so that the heating quantity of the outside of the cylinder is reduced, and the indicating efficiency and the whole machine energy efficiency of the rotary compressor are improved.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (10)

1. A stator assembly, comprising:

the stator core is provided with a plurality of windings in the circumferential direction, adjacent windings are spaced through insulating limit parts, and a winding gap is formed between the insulating limit parts of the adjacent windings;

the heat pipe assembly comprises an evaporation section and a condensation section, wherein the evaporation section extends into the winding gap from the end face of the stator core, the condensation section extends out of the periphery of the stator core, and the extension direction of the evaporation section and the extension direction of the condensation section form a U shape.

2. The stator assembly according to claim 1, wherein the evaporator section comprises an annular manifold and a plurality of flat micro heat pipes, the annular manifold is disposed on an end face of the stator core, and the plurality of flat micro heat pipes extend perpendicular to the annular manifold and into each of the winding gaps.

3. The stator assembly of claim 2, wherein the condensing section extends from an outer periphery of the annular manifold and extends perpendicular to the annular manifold and to an outer periphery of the stator core.

4. The stator assembly of claim 2, wherein an end face of the annular manifold abuts an end face of the stator core; and

two flat surfaces of the flat micro heat pipe are respectively attached to the adjacent insulation limiting parts of the windings, so that in each winding gap, surface contact is respectively formed between the flat micro heat pipe and the insulation limiting parts and between the insulation limiting parts and the windings.

5. The stator assembly of claim 2, wherein the flat micro heat pipes extend along a central axis of the stator core to a height that is the same as a height of the windings.

6. The stator assembly of claim 2, wherein the plurality of flat micro heat pipes are arranged in a central symmetrical manner along a central axis of the stator core.

7. The stator assembly of claim 2, wherein a tube diameter of the annular manifold is equal to or greater than a tube diameter of the condenser section.

8. The stator assembly according to claim 3, wherein the heat pipe assembly is a gravity heat pipe, the flat micro heat pipes and the condensing section extend upward perpendicular to the annular manifold, respectively, and the extending height of the condensing section is higher than that of the flat micro heat pipes, and a heat transfer medium in the heat pipe assembly flows back from the condensing section to the evaporating section under the action of gravity.

9. The stator assembly of claim 2, wherein the wall of the heat pipe assembly is provided with a wick, and the capillary suction of the wick of the flat micro heat pipe is greater than the capillary suction of the wick of the annular manifold, and the heat transfer medium in the heat pipe assembly flows back from the condensing section to the evaporating section under the capillary suction of the wick.

10. A rotary compressor, characterized in that the rotary compressor comprises a stator assembly according to any one of claims 1-9; and

the stator core and the evaporation section of the heat pipe assembly are contained in the shell, and the condensation section of the heat pipe assembly extends out of the shell.

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