CN111463921A

CN111463921A - Compressor and air conditioner with same

Info

Publication number: CN111463921A
Application number: CN202010414247.3A
Authority: CN
Inventors: 郑学良; 刘才; 孙文娇; 王晶; 赵素珍
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai; Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-07-28

Abstract

The invention provides a compressor and an air conditioner with the same. The compressor includes a housing; the stator iron core is arranged in the shell; and the connecting part is arranged on at least one end of the stator core, and the stator core is connected with the shell through the connecting part. Through setting up connecting portion for the stator core of motor is connected with the casing of compressor through connecting portion, sets up like this and makes the assembly of motor and casing simpler, the reliability is high. Through the mounting mode who sets up connecting portion, can reduce stator core's stress iron loss to promoting motor efficiency, promoting the compressor efficiency, improved stator core's rigidity simultaneously, reduce the noise of motor vibration, reduce compressor complete machine noise.

Description

Compressor and air conditioner with same

Technical Field

The invention relates to the technical field of air conditioning equipment, in particular to a compressor and an air conditioner with the same.

Background

The problem of noise of the air conditioner is ubiquitous in the industry at present, noise of a compressor of an air conditioner outdoor unit and vibration noise of a shell caused by vibration of the air conditioner outdoor unit are main sources of outdoor noise, and the problems of electromagnetic vibration and noise of a compressor motor also become main concerns in the refrigeration air conditioning industry. Besides directly influencing the experience performance of the air conditioner, the vibration and the noise of the compressor also influence the overall performance of the air conditioner, such as service life and operational reliability.

The motor adopting the distribution and winding scheme is subjected to a paint dipping process, so that the insulation performance is improved, but due to collision during assembly of the shell and the rotor, the damage to the paint skin of the enameled wire can still be avoided, and the compressor can be damaged or even burnt when in operation. Meanwhile, the motor is used as a core component of the compressor, the efficiency and noise problems of the motor directly influence the overall performance of the compressor, the efficiency and noise problems of the motor are mutually restricted, the higher the motor efficiency is, the better the user experience is, the lower the noise of the motor is, the better the motor efficiency is, the larger groove area is needed, the width of a stator tooth of the motor can be narrowed, the thickness of a stator yoke is thinned, the rigidity of the stator is reduced, the motor vibration is large, the noise is large, the vibration of the compressor is large, the noise is large, the width of the stator yoke needs to be increased if the rigidity of the motor is improved in order to reduce the noise of the motor, but the motor efficiency is reduced, and therefore the motor with.

In the prior art, the arrangement of the stator tooth yoke is unchanged, and only winding is changed, so that the insulation characteristic is improved, and the efficiency and the noise of the compressor cannot be improved. Still with motor housing insulating material of moulding plastics, adopt special motor housing protection mode, improve insulating characteristic, but can not improve compressor efficiency and compressor noise.

Disclosure of Invention

The invention mainly aims to provide a compressor and an air conditioner with the same, and aims to solve the problem that the noise of the compressor is high in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a compressor including: a housing; the stator iron core is arranged in the shell; and the connecting part is arranged on at least one end of the stator core, and the stator core is connected with the shell through the connecting part.

Further, the connecting portion is made of a thermally expansive material, and a radial expansion coefficient of the connecting portion is greater than or equal to 1.15/degree.

Further, the stator core is connected with the connecting portion in a shrink fit mode, and the outer surface of the stator core is arranged at a distance from the shell.

Furthermore, the connecting part is of an annular structure, and a circulation hole for the refrigerant and the lubricating oil to pass through is formed in the connecting part.

Furthermore, the outer diameter of the stator core before the connection part is sleeved is d1, the outer diameter of the stator core after the connection part is sleeved is a, and the outer diameter of the stator core is d2, wherein 0.48 > (d1-a-d2)/2 > 0.2.

Furthermore, a plurality of stator teeth are arranged on the inner circle of the stator core, stator slots are formed between adjacent stator teeth, stator windings are arranged in the stator slots, and reinforcing members are arranged in gaps among the stator windings in the stator slots.

Furthermore, partial reinforcing members are arranged in a fit manner with a stator yoke of the stator core, an insulating framework is arranged on the stator teeth, and/or an insulating framework is arranged on the stator yoke.

Furthermore, the stator slot is a plurality of, and at least one stator slot in a plurality of stator slots is provided with the reinforcement.

Further, the inner diameter of the annular structure of the connecting line enclosing wall of the inner ring of the reinforcing member is smaller than or equal to the inner diameter of the stator core.

Further, at least one of the connecting portion and the reinforcing member is made of at least one of alkyd resin, polyurethane, epoxy resin, phenolic resin, polyimide resin, polyacrylate, silicone resin, or aromatic heterocyclic polymer.

Further, the axial height of the connecting portion is greater than that of the insulating framework, and the axial height of the reinforcing member is lower than that of the connecting portion.

Further, a part of the reinforcing members are arranged to cover the stator winding, and the other part of the reinforcing members are arranged in a gap formed between the connecting part and the insulating framework.

Further, the connecting part is integrally arranged with the insulating framework.

Further, the outer edge profile of the connecting portion is a full circle structure, or the outer edge of the connecting portion includes a partial circular arc.

Furthermore, the maximum distance between the reinforcing member and the stator core is R1, the inner diameter of the connecting part is R2, and R1 is not more than R2.

Further, the stator winding is a concentrated coil.

According to another aspect of the present invention, there is provided an air conditioner including a compressor, the compressor being the above-mentioned compressor.

By applying the technical scheme of the invention, the stator core of the motor is connected with the shell of the compressor through the connecting part by arranging the connecting part, so that the motor and the shell are simpler to assemble and have high reliability. Through the mounting mode who sets up connecting portion, can reduce stator core's stress iron loss to promoting motor efficiency, promoting the compressor efficiency, improved stator core's rigidity simultaneously, reduce the noise of motor vibration, reduce compressor complete machine noise.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural view of an embodiment of a compressor according to the present invention;

FIG. 2 shows a schematic cross-sectional view of an embodiment of a compressor according to the present invention;

fig. 3 is a schematic view showing an assembly structure of a stator core and an embodiment of a connecting part, a stator winding and an insulating bobbin according to the present invention;

fig. 4 shows an exploded view of an embodiment of a stator core and connection, stator winding, insulating skeleton according to the invention;

fig. 5 shows a schematic cross-sectional structural view of a stator core and a first embodiment of a connection, a stator winding, an insulating skeleton according to the invention;

fig. 6 shows a schematic cross-sectional structural view of a stator core and a second embodiment of a connection part, a stator winding, an insulating skeleton according to the invention;

FIG. 7 is a graph showing a comparison of motor efficiency of a motor of a compressor according to the present invention with that of the prior art;

FIG. 8 is a graph illustrating the energy efficiency of a compressor according to the present invention compared to that of a prior art compressor;

fig. 9 shows a graph comparing the noise of the compressor according to the present invention with that of the compressor of the prior art.

Wherein the figures include the following reference numerals:

10. a housing; 20. a stator core; 30. a connecting portion; 40. an insulating framework; 50. a stator winding; 60. a reinforcement;

70. and a pump body assembly.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.

Referring to fig. 1 to 9, according to an embodiment of the present application, a compressor is provided.

Specifically, as shown in fig. 1 and 2, the compressor includes a shell 10, a stator core 20, and a connection part 30. The stator core 20 is disposed in the housing 10. The connection portion 30 is provided on at least one end of the stator core 20, and the stator core 20 is connected to the case 10 through the connection portion 30.

In this embodiment, through setting up connecting portion for the stator core of motor is connected with the casing of compressor through connecting portion, sets up like this and makes the assembly of motor and casing simpler, the reliability is high. Through the mounting means who sets up connecting portion, can reduce stator core's stress iron loss, play the effect that promotes motor efficiency, promote the compressor efficiency. Meanwhile, the connecting part is arranged, so that the rigidity of the stator core is improved, the vibration noise of the motor is reduced, and the overall noise of the compressor is reduced.

Preferably, the connection portion 30 is made of a thermally expansive material, and the radial expansion coefficient of the connection portion 30 is greater than or equal to 1.15/degree. The connecting part made of the material with the higher thermal expansion coefficient is enabled to rise along with the internal temperature of the compressor by the arrangement, so that the motor is more and more tightly assembled with the shell, meanwhile, the smaller interference magnitude is more convenient to assemble at the normal temperature, the stress iron loss is reduced, the motor efficiency can be improved, and the compressor energy efficiency is improved.

Specifically, the stator core 20 and the connection portion 30 are connected by shrink fit, and the outer surface of the stator core 20 is disposed with a distance from the housing 10. The problem that the stress iron loss of the stator core is caused by the fact that the stator core is too much in contact with the shell can be avoided through the arrangement.

Preferably, the connecting portion 30 is an annular structure, and a flow hole for passing the refrigerant and the lubricating oil is formed on the connecting portion 30. The arrangement can improve the practicability and reliability of the compressor and improve the strength of the stator core.

Further, the outer diameter of the connection part 30 before shrink fitting is d1, the outer diameter of the connection part 30 after shrink fitting is a, and the outer diameter of the stator core 20 is d2, wherein 0.48 > (d1-a-d2)/2 > 0.2. Wherein the temperature before the hot-sleeving and the temperature after the hot-sleeving are 20 degrees. This arrangement enables the rigidity of the structure of the stator core and the connecting member to be optimized.

As shown in fig. 3 to 6, a plurality of stator teeth are disposed on an inner circle of the stator core 20, stator slots are formed between adjacent stator teeth, a stator winding 50 is disposed in each stator slot, and a reinforcing member 60 is disposed in a gap between the stator windings 50 in each stator slot. The arrangement can improve the connection stability of the stator core assembly, wherein the partial reinforcing member 60 is attached to the stator yoke of the stator core 20, the insulating framework 40 is arranged on the stator teeth, and/or the insulating framework 40 is arranged on the stator yoke. The reinforcing member may be in direct contact with the stator core or may be insulated with the slot interposed therebetween. The reinforcing part plays the effect of connecting, firm to can promote holistic rigidity.

The stator slot is a plurality of, and at least one stator slot in a plurality of stator slots is provided with reinforcement 60. That is, in the embodiment of the present application, the reinforcement 60 may be provided in a part of the stator slots, and the reinforcement may not be provided in another part of the stator slots. Wherein the inner diameter of the annular structure of the reinforcement 60 inner ring connecting wire enclosing wall is less than or equal to the inner diameter of the stator core 20. This arrangement can improve the performance of the motor having the stator core.

In the present application, at least one of the connection portion 30 and the reinforcing member 60 is made of at least one of alkyd resin, polyurethane, epoxy resin, phenolic resin, polyimide resin, polyacrylate, silicone resin, or aromatic heterocyclic polymer. The connecting part and the reinforcing part are made of materials which are non-magnetic, refrigerant-resistant, high-temperature-resistant and good in insulativity.

Wherein, the axial height of the connecting part 30 is greater than that of the insulating framework 40, and the axial height of the reinforcing member 60 is lower than that of the connecting part 30. Part of the reinforcing members 60 is disposed to cover the stator winding 50, and the other part of the reinforcing members 60 is disposed in the gap formed between the connection portion 30 and the insulating bobbin 40. The overall strength of the stator core can be improved by the arrangement, and the performance of the motor with the stator core is improved.

In order to further improve the motor performance of the stator core, the connection portion 30 is integrally provided with the insulating bobbin 40.

Further, as shown in fig. 5, the outer edge profile of the connecting portion 30 is a full circle structure. Alternatively, the outer edge of the connecting portion 30 may include a partial circular arc, that is, the molded line of the outer edge of the connecting portion 30 may not be a full circle, but a channel for circulating the refrigerant and the lubricant is defined between the full circle and the housing. The maximum distance between the reinforcing member 60 and the stator core 20 is R1, and the inner diameter of the connecting part 30 is R2, wherein R1 is not more than R2. In the present embodiment, the stator winding 50 is a concentrated coil.

Specifically, the housing and the stator core are in interference fit, the overall noise of the compressor is in a descending trend along with the increase of the interference, but if the interference is too large, the problem that the reject ratio of the shrink fit is increased (the stator core shrink fit does not enter the housing) can occur when the housing is assembled with the stator, and the excessive interference can cause the stator core to deform, so that the noise is deteriorated and even damaged.

In order to solve such a situation, in the present application, there is provided a connecting member which is mounted on upper and lower end surfaces of a stator core and has an outer diameter exceeding an outer diameter of the stator. The connecting part is made of a material with a large thermal expansion coefficient, and when the hot sleeving is started, the outer diameter of the connecting part is small, the interference magnitude is small relative to the shell, and the assembling is easy. When the compressor is in work, as the frequency of the compressor is increased, the radial length of the connecting part is slowly expanded when the internal temperature is increased, the interference magnitude between the shell and the connecting part is gradually increased, and the integral rigidity of the shell, the connecting part and the stator core is increased, so that the integral noise of the compressor is reduced. The connecting part, the stator core and the insulation framework are provided with gaps among windings on adjacent teeth in the stator slot, the reinforcing part is used for filling the gaps, the connecting part, the stator core and the insulation framework are limited, the movement space of the windings on the adjacent teeth in the stator slot is limited, and the connecting part is directly attached to the yoke part of the stator or is attached to the yoke part of the stator through slot insulation. The reinforcing component is used for installing the connecting component and the stator core, and also plays a role in further enhancing the integral rigidity of the compressor motor.

Meanwhile, the yoke of the stator is not in direct contact with the shell of the compressor, so that the yoke is not directly stressed, the yoke can be made thinner, the groove area is increased, the loss of the motor is reduced, the efficiency of the compressor is improved, meanwhile, the integral rigidity of the motor is improved due to the reinforcing part, and the noise peak value within 1000Hz of the frequency spectrum of the compressor is reduced (as shown in figure 9).

The connecting member and the reinforcing member may be used separately and may function accordingly. When the connecting part is used independently, the connecting part and the insulating framework are of an integrated structure. Likewise, the integral connecting member skeleton may act simultaneously with the reinforcement member. And under the highest operating temperature of the compressor, the inner diameter of the framework of the integrated connecting piece is not less than the inner diameter of the stator core.

The inner edge of the reinforcing component does not exceed the inner diameter of the stator core, the reinforcing component is always fixed on the stator, when the motor runs, the rotor rotates at a high speed, and the inner edge of the reinforcing component does not exceed the inner diameter of the stator in order to prevent the reliability that the scanning problem affects the motor and the compressor.

The connecting part and the reinforcing part are made of non-magnetic materials, the connecting part and the reinforcing part are arranged in the stator groove, if magnetic conduction affects a magnetic circuit, the connecting part and the reinforcing part are resistant to refrigerants, the refrigerants flow in the compressor, and if the connecting part and the reinforcing part are not resistant to the refrigerants, impurities are generated due to corrosion, and the reliability of the compressor is reduced. The reinforcing part is high-temperature resistant and good in insulating property, the compressor runs at a high speed, the temperature of the motor rises, and meanwhile, the winding on the teeth is electrified, so that the insulating reliability of the motor can be further improved.

As shown in fig. 7, since the stator core is connected to the housing by the connecting member, the stator core does not have to suffer from stress iron loss, resulting in increased loss, and thus the efficiency of the motor is improved by 1% to 2% compared with a normal motor.

The connecting part is provided with the circulation hole which can be arranged at the outer edge or the inner part of the connecting part to achieve the effects of smooth circulation and oil return of the refrigerant, thereby improving the energy efficiency of the compressor. The reinforcing part wraps the end portion of the winding, gaps between the insulating framework and the end portion of the winding are filled with the reinforcing part, the tightness of the winding is improved, meanwhile, the rigidity of the motor is further improved by the reinforcing part at the end portion, the vibration noise of the motor is reduced, the noise caused by mechanical vibration of the compressor is reduced, the reliability of the compressor is improved, the axial direction of the reinforcing part is not higher than the end portion of the connecting part and is higher than the outer wall of the insulating framework, the insulating framework is completely wrapped by the reinforcing part, and the overall rigidity of. The reinforcing part exceeds the height of the connecting part, the rigidity is not obviously improved, and materials are wasted.

It should be noted that, in the present application, the compressor further includes a pump body assembly 70.

In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A compressor, comprising:

a housing (10);

a stator core (20), the stator core (20) being disposed within the housing (10);

a connecting portion (30), the connecting portion (30) being disposed on at least one end of the stator core (20), the stator core (20) being connected to the housing (10) through the connecting portion (30).

2. Compressor according to claim 1, characterized in that said connection portion (30) is made of a thermally expandable material, said connection portion (30) having a radial expansion coefficient greater than or equal to 1.15/degree.

3. Compressor according to claim 1, characterized in that the stator core (20) and the connection part (30) are connected by shrink-fitting, and the outer surface of the stator core (20) is arranged at a distance from the shell (10).

4. The compressor according to any one of claims 1 to 3, wherein the connecting portion (30) has an annular structure, and the connecting portion (30) is provided with a flow hole for passing a refrigerant and a lubricating oil therethrough.

5. The compressor of claim 3, wherein an outer diameter of the coupling portion (30) before shrink fitting is d1, an outer diameter of the coupling portion (30) after shrink fitting is a, and an outer diameter of the stator core (20) is d2, wherein 0.48 > (d1-a-d2)/2 > 0.2.

6. The compressor of claim 1, wherein a plurality of stator teeth are disposed on an inner circle of the stator core (20), stator slots are formed between adjacent stator teeth, a stator winding (50) is disposed in each stator slot, and a reinforcing member (60) is disposed in a gap between the stator windings (50) in each stator slot.

7. A compressor according to claim 6, characterized in that part of the reinforcement (60) is arranged in abutment with a stator yoke of the stator core (20), the stator teeth being provided with an insulating skeleton (40) and/or the stator yoke being provided with the insulating skeleton (40).

8. A compressor according to claim 6, wherein the stator slot is plural, and the reinforcement (60) is provided in at least one of the plural stator slots.

9. A compressor according to claim 6, characterized in that the inner diameter of the annular structure of the reinforcement (60) encircling the inner ring line is smaller than or equal to the inner diameter of the stator core (20).

10. The compressor of claim 6, wherein at least one of the connecting portion (30) and the reinforcing member (60) is made of at least one of alkyd resin, polyurethane, epoxy resin, phenolic resin, polyimide resin, polyacrylate, silicone resin, or aromatic heterocyclic polymer.

11. Compressor according to claim 7, characterized in that the axial height of the connection portion (30) is greater than the axial height of the insulating skeleton (40), the axial height of the reinforcement (60) being lower than the axial height of the connection portion (30).

12. Compressor according to claim 7, characterized in that part of the reinforcement (60) is arranged to cover the stator winding (50) and another part of the reinforcement (60) is arranged in the air gap formed between the connection part (30) and the insulating frame (40).

13. Compressor according to claim 7, characterized in that said connection portion (30) is provided integrally with said insulating skeleton (40).

14. Compressor according to claim 1, characterized in that the outer edge profile of the connecting portion (30) is a full circle configuration, or the outer edge of the connecting portion (30) comprises a partial circular arc.

15. The compressor of claim 6, wherein the reinforcement (60) is spaced from the stator core (20) by a maximum distance of R1, and the connecting portion (30) has an inner diameter of R2, wherein R1 ≦ R2.

16. Compressor according to claim 6, characterized in that the stator winding (50) is a concentrated coil.

17. An air conditioner comprising a compressor, wherein the compressor is as claimed in any one of claims 1 to 16.