阅读说明：本技术 涡旋压缩机及空调设备 (Scroll compressor and air conditioning equipment ) 是由 赵素珍 王晶 孙文娇 陈华杰 张辉 李雪峰 于 2021-01-21 设计创作，主要内容包括：本发明涉及空调领域,提供一种涡旋压缩机及空调设备。涡旋压缩机包括壳体、上支架和电机,上支架具有回油油路,壳体的内侧壁上固定有导流板,导流板与壳体围成有导流通道,回油油路的排油口位于导流通道的上方,导流通道包括由上至下分布的第一段和第二段；电机的定子铁芯的周壁上具有第一槽、第二槽和第三槽,第一槽的槽壁面为法线沿定子铁心的径向的平切面,第一槽与导流通道在竖直方向上正对,第二槽和第三槽对称分布在第一槽的沿定子铁芯的周向的两侧；在法线沿竖直方向的截面上,第一段的截面积为S1,第二段的截面积为S2,第一槽的截面积为S3,第二槽与第三槽的截面积之和为S4,0.3≤(S1－S2)/(S3+S4)≤1。涡旋压缩机的回油过程顺畅,排气吐油率较低。(The invention relates to the field of air conditioners and provides a scroll compressor and air conditioning equipment. The scroll compressor comprises a shell, an upper bracket and a motor, wherein the upper bracket is provided with an oil return path, a guide plate is fixed on the inner side wall of the shell, the guide plate and the shell are enclosed to form a guide channel, an oil outlet of the oil return path is positioned above the guide channel, and the guide channel comprises a first section and a second section which are distributed from top to bottom; the peripheral wall of a stator core of the motor is provided with a first groove, a second groove and a third groove, the wall surface of the first groove is a tangent plane of which the normal line is along the radial direction of the stator core, the first groove is opposite to the flow guide channel in the vertical direction, and the second groove and the third groove are symmetrically distributed on two sides of the first groove along the circumferential direction of the stator core; on the section of the normal line along the vertical direction, the sectional area of the first section is S1, the sectional area of the second section is S2, the sectional area of the first groove is S3, the sum of the sectional areas of the second groove and the third groove is S4, and the sum of the sectional areas of the second groove and the third groove is not less than 0.3 (S1-S2)/(S3 + S4) is not more than 1. The oil return process of the scroll compressor is smooth, and the exhaust and oil discharge rate is low.)

1. The scroll compressor comprises a shell, an upper bracket and a motor, wherein the upper bracket and the motor are both arranged in an inner cavity of the shell, and the upper bracket is positioned above the motor;

an air outlet is formed in the shell and is positioned between the upper bracket and the motor;

the method is characterized in that:

the upper bracket is provided with an oil return oil path, a guide plate is fixed on the inner side wall of the shell, a guide channel is enclosed by the guide plate and the shell, an oil discharge port of the oil return oil path is positioned above the guide channel, and the guide channel comprises a first section and a second section which are distributed from top to bottom;

the exhaust port is arranged on one side wall of the shell along a first horizontal direction, and the guide plate is fixed on the inner side of the other side wall of the shell;

the motor comprises a stator core, the outer peripheral wall of the stator core is fixedly connected with the inner peripheral wall of the shell, a first type of notch and a second type of notch are formed in the outer peripheral wall of the stator core, the first type of notch and the second type of notch penetrate through the stator core along the vertical direction, and the wall surface of the first type of notch is a tangent plane of which the normal line is along the radial direction of the stator core;

the first type of the notches comprise first notches, the normal line of the wall surface of each first notch is along the first horizontal direction, the first notches are opposite to the flow guide channel in the vertical direction, the second type of the notches comprise second notches and third notches, and the second notches and the third notches are symmetrically distributed on two sides of the first notches along the circumferential direction of the stator core;

on the section of the normal line along the vertical direction, the sectional area of the first section is S1, the sectional area of the second section is S2, the sectional area of the first groove is S3, the sum of the sectional areas of the second groove and the third groove is S4, and the sum of the sectional areas of the second groove and the third groove is S4 and is not less than 0.3 (S1-S2)/(S3 + S4) and not more than 1.

2. The scroll compressor of claim 1, wherein:

the maximum distance between the wall surface of the first groove and the shell in the first horizontal direction is a first size C;

the guide plate is provided with a first inner plate section and a second inner plate section, the main face of the first inner plate section and the main face of the second inner plate section are both column arc faces with axes coincident with the axes of the stator cores, the first inner plate section is located on the radial inner side of the first section, the second inner plate section is located on the radial inner side of the second section, the radial distance between the second inner plate section and the shell is a second dimension D, and D/C is larger than or equal to 1 and smaller than or equal to 2.

3. The scroll compressor of claim 1, wherein:

the second type of slot is a plane symmetrical slot, and the symmetrical plane of the second type of slot passes through the axis of the stator core;

an included angle between the symmetrical plane of the second groove and the symmetrical plane of the third groove is a, a central angle of the first groove corresponding to the stator core is b, and a/b is larger than or equal to 1.35 and smaller than or equal to 2.

4. The scroll compressor of claim 3, wherein:

the cross section of the groove wall surface of the second type of notch groove along the vertical direction at the normal is semicircular in outline shape.

5. The scroll compressor of any one of claims 1 to 4, wherein:

the number of the first-type notches is at least two, and the sum of the cross sections of the normal lines of the first-type notches in the vertical direction is S33;

the number of the second-type notches is at least two, the sum of the sectional areas of the normal lines of the second-type notches along the vertical direction is S44, and the sum is more than or equal to 0.1 and less than or equal to (S1-S2)/(S33 + S44) and less than or equal to 0.8.

6. The scroll compressor of claim 5, wherein:

the stator core is also provided with at least one third type of notch, and the sum of the cross-sectional areas of the normals of the third type of notch along the vertical direction is S55, S55/(S33+ S44) is more than or equal to 0.05 and less than or equal to 0.48, and/or S33/(S33+ S44+ S55) is more than or equal to 0.5 and less than or equal to 1.

7. The scroll compressor of claim 6, wherein:

the number of the first type of notches is two, and/or the number of the second type of notches is less than or equal to six, and/or the number of the third type of notches is two.

8. The scroll compressor of any one of claims 1 to 4, wherein:

the position of each notch in the circumferential direction is staggered with the exhaust port.

9. The scroll compressor of any one of claims 1 to 4, wherein:

3.4≤S3/S2≤9.7。

10. air conditioning equipment, its characterized in that:

comprising a scroll compressor as claimed in any one of claims 1 to 9.

Technical Field

The invention relates to the field of air conditioners, in particular to a scroll compressor and air conditioning equipment.

Background

The scroll compressor is developed towards a direction of increasing the displacement, however, as the displacement of the scroll compressor increases, the oil return effect of the exhaust gas on the lubricating oil increases, the oil discharge rate (the ratio of the lubricating oil in the exhaust gas) increases, the moving parts of the scroll compressor cannot be well lubricated, and the performance of the scroll compressor is affected.

Disclosure of Invention

One object of the present invention is to provide a scroll compressor having a low oil discharge rate.

The scroll compressor provided by the invention comprises a shell, an upper bracket and a motor, wherein the upper bracket and the motor are both arranged in an inner cavity of the shell, and the upper bracket is positioned above the motor; an exhaust port is formed in the shell and is positioned between the upper bracket and the motor; the upper bracket is provided with an oil return path, a guide plate is fixed on the inner side wall of the shell, a guide channel is enclosed by the guide plate and the shell, an oil outlet of the oil return path is positioned above the guide channel, and the guide channel comprises a first section and a second section which are distributed from top to bottom; the air outlet is arranged on the shell wall at one side of the shell along the first horizontal direction, and the guide plate is fixed on the inner side of the shell wall at the other side of the shell; the motor comprises a stator core, wherein the outer peripheral wall of the stator core is fixedly connected with the inner peripheral wall of the shell, a first type of notch and a second type of notch are formed in the outer peripheral wall of the stator core and penetrate through the stator core along the vertical direction, and the wall surface of the first type of notch is a tangent plane of which the normal line is along the radial direction of the stator core; the first type of the notches comprise first notches, the normal line of the wall surfaces of the first notches is along a first horizontal direction, the first notches are opposite to the flow guide channel in the vertical direction, the second type of the notches comprise second notches and third notches, and the second notches and the third notches are symmetrically distributed on the two sides of the first notches along the circumferential direction of the stator core; on the section of the normal line along the vertical direction, the sectional area of the first section is S1, the sectional area of the second section is S2, the sectional area of the first groove is S3, the sum of the sectional areas of the second groove and the third groove is S4, and the sum of the sectional areas of the second groove and the third groove is not less than 0.3

(S1－S2)/(S3+S4)≤1。

Therefore, the oil return process of the scroll compressor is not easily interfered by exhaust and internal airflow, the oil return process is smooth, the exhaust and oil discharge rate is low, the pump body assembly can be well lubricated, and the energy efficiency of the scroll compressor can be improved; and the first groove, the second groove and the third groove are arranged on the peripheral wall of the stator core, so that the hot jacket stress and the iron loss of the stator core are reduced.

Preferably, the maximum distance between the wall surface of the first groove and the shell in the first horizontal direction is a first dimension C; the guide plate is provided with a first inner plate section and a second inner plate section, the main face of the first inner plate section and the main face of the second inner plate section are column arc faces with axes coincident with the axis of the stator core, the first inner plate section is located on the radial inner side of the first section, the second inner plate section is located on the radial inner side of the second section, the radial distance between the second inner plate section and the shell is a second size D, and D/C is larger than or equal to 1 and smaller than or equal to 2.

As can be seen from the above, this is further advantageous in reducing the oil discharge rate.

Another preferred scheme is that the second type of slot is a plane-symmetric slot, and the symmetric plane of the second type of slot passes through the axis of the stator core; an included angle between the symmetrical surface of the second groove and the symmetrical surface of the third groove is a, a central angle of the first groove corresponding to the stator core is b, and a/b is more than or equal to 1.35 and less than or equal to 2.

Therefore, the oil return process is further facilitated to be smooth.

In a further aspect, the groove wall surface of the second type of groove has a semicircular cross-sectional profile shape along a vertical direction at a normal line.

Still another preferred scheme is that the number of the first-type unfilled grooves is at least two, and the sum of the cross-sectional areas of the normals of the first-type unfilled grooves along the vertical direction is S33; the number of the second type of notches is at least two, the sum of the sectional areas of the normal lines of the second type of notches along the vertical direction is S44, and the sum of the sectional areas is more than or equal to 0.1 and less than or equal to (S1-S2)/(S33 + S44) and less than or equal to 0.8.

The stator core is further provided with at least one third type of notch, and the sum of the sectional areas of the normals of the third type of notch along the vertical direction is S55, S55/(S33+ S44) is more than or equal to 0.05 and less than or equal to 0.48, and/or S33/(S33+ S44+ S55) is more than or equal to 0.5 and less than or equal to 1.

Further, the number of the first type of the grooves is two, and/or the number of the second type of the grooves is less than or equal to six, and/or the number of the third type of the grooves is two.

In a further preferred embodiment, the position of each notch in the circumferential direction is offset from the exhaust port.

In another preferred embodiment, 3.4. ltoreq.S 3/S2. ltoreq.9.7.

The second purpose of the present invention is to provide an air conditioning apparatus with a low oil discharge rate.

The air conditioning equipment provided by the invention comprises the scroll compressor.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the scroll compressor of the present invention;

FIG. 2 is a sectional view of a portion of the construction of an embodiment of the scroll compressor of the present invention, with the normal to the sectional planes of FIGS. 1 and 2 both passing through the axis of the scroll compressor and both being perpendicular to a first horizontal direction;

FIG. 3 is a sectional view of a portion of an embodiment of a scroll compressor according to the present invention, with the normal to the section plane of FIG. 3 parallel to the axis of the scroll compressor;

FIG. 4 is a graph showing the relationship between the oil discharge rate and (S1-S2)/(S3 + S4) in the case where a/b is different in the scroll compressor of the embodiment of the present invention;

FIG. 5 is a graph showing the relationship between the oil discharge rate and (S1-S2)/(S3 + S4) in various cases where D/C values are different in the embodiment of the scroll compressor of the present invention.

Detailed Description

Scroll compressor and air conditioning equipment embodiment:

the air conditioning equipment of this embodiment may be, for example, an outdoor unit of an air conditioner, or an entire air conditioning system including the outdoor unit of the air conditioner, or an integrated air conditioner, such as a window air conditioner.

The air conditioning equipment of this embodiment includes the scroll compressor of this embodiment, please refer to fig. 1, scroll compressor includes casing 1, pump body subassembly 2, upper bracket 3 and motor 4 are all installed in the inner chamber that casing 1 encloses, the stator core 41 of upper bracket 3 and motor 4 is all fixed on casing 1, pump body subassembly 2 installs the upside at upper bracket 3, pump body subassembly 2 passes through the drive of motor 4, the axis of motor 4 is along vertical direction, the technical scheme that motor 4 driven pump body subassembly 2 can see prior art and set up, no longer describe herein.

The motor 4 is arranged below the upper bracket 3 at intervals, and the shell 1 is fixedly connected with the peripheral wall of the stator core 41 in a shrink fit mode.

Along first horizontal direction X, the gas vent 11 has been seted up on the lateral wall of casing 1, and gas vent 11 is located between upper bracket 3 and motor 4 in vertical direction, is fixed with guide plate 5 on the opposite side lateral wall of casing 1, and guide plate 5 is located the inside wall of casing 1.

Referring to fig. 1 and 2, the upper bracket 3 has an oil return path 31, the guide plate 5 and the inner sidewall of the housing 1 form a guide passage 51, and an oil discharge port of the oil return path 31 is located right above the guide passage 51.

Referring to fig. 2, the diversion channel 51 includes a first section 511 and a second section 512, and the first section 511 and the second section 512 are distributed from top to bottom, the cross-sectional area of the first section 511 in the vertical direction is S1, and the cross-sectional area of the second section 512 in the vertical direction is S2.

Referring to fig. 2, the baffle plate 5 further has a first inner plate wall 52 and a second inner plate wall 53, the first inner plate wall 52 is located on the radial inner side of the first section 511, the second inner plate wall 53 is located on the radial inner side of the second section 512, the main surfaces of the first inner plate wall 52 and the second inner plate wall 53 are both column arc surfaces whose axes are coincident with the axis of the stator core 41, and the radial distance between the first inner plate wall 52 and the housing 1 is the second dimension D.

Referring to fig. 3, the stator core 41 includes a first slot 411, a second slot 412, a third slot 413, and a fourth slot 414, the first slot 411, the second slot 412, the third slot 413, and the fourth slot 414 all penetrate through the stator core 41 along a vertical direction, the first slot 411, the second slot 412, and the third slot 413 are all located on a peripheral wall of the stator core 41, a slot wall surface of the first slot 411 is a planar section with a normal line along a first horizontal direction X, the second slot 412 and the third slot 413 are symmetrically distributed on two sides of the first slot 411 along a circumferential direction of the stator core 41, cross-sectional profiles of the second slot 412 and the third slot 413 along the normal line along the vertical direction are both semicircular, a cross-sectional profile of the fourth slot 414 along the vertical direction is kidney-shaped, the first slot 411 belongs to a first kind of slot, the second slot 412 and the third slot 413 belong to a second kind of slot, and the third slot 413 belongs to a third kind of slot.

Referring to fig. 2 and 3, the maximum distance between the wall surface of the first slot 411 and the inner wall surface of the housing 1 is the first dimension C, and D/C is greater than or equal to 1 and less than or equal to 2.

On the section of the normal line along the vertical direction, the sectional area of the first groove 411 is S3, the sum of the sectional areas of the second groove 412 and the third groove 413 is S4, and the sum of the sectional areas of the second groove 412 and the third groove 413 is not less than 0.3 (S1-S2)/(S3 + S4) not more than 1.

Referring to fig. 3, an included angle between a symmetric plane of the second slot 412 and a symmetric plane of the third slot 413 is a, a central angle of the first slot 411 on the stator core 41 is b, and a/b is greater than or equal to 1.35 and less than or equal to 2.

When the scroll compressor is operated, the oil return passage is formed by the oil return passage 31, the flow guide passage 51 and the first groove 411, lubricating oil returns to the lower part of the motor 4 from the upper bracket 3 through the oil return passage, and in order to reduce the influence of exhaust on oil return, the oil return passage and the exhaust port 11 are arranged on two opposite sides of the shell 1, so that the exhaust oil spitting rate can be reduced to a certain extent.

The oil return to the lower side of the motor 4 will increase the pressure below the motor 4, and therefore the lower side of the motor 4 needs to be exhausted upwards at the same time, in this embodiment, the second groove 412 and the third groove 413 are provided to allow the airflow at the lower side of the motor 4 to flow upwards, the closer the second groove 412 and the third groove 413 are to the first groove 411, the more sensitive response is easy to be in the oil return process, however, if the second groove 412 and the third groove 413 are too close to the first groove 411, the exhaust airflow may cause the oil return disorder, resulting in poor oil return, and increasing the exhaust oil-spitting rate.

Therefore, the parameter that a/b is more than or equal to 1.35 and less than or equal to 2 is set in this embodiment, which is not only beneficial to the second groove 412 and the third groove 413 to have sharp response when the oil return channel returns oil, but also capable of reducing the great adverse effect of the air flow of the second groove 412 and the third groove 413 on the oil return, and avoiding the oil return disorder.

In order to illustrate the influence of the value of a/b and the value of (S1-S2)/(S3 + S4) on the exhaust gas oil discharge rate of the scroll compressor, under normal temperature and normal pressure, in the present embodiment, under various conditions that the value of a/b is different, a relation curve that the oil discharge rate is changed along with (S1-S2)/(S3 + S4) is shown in FIG. 4, and as can be seen from FIG. 4, when the value of a/b is more than or equal to 1.35 and less than or equal to 2, and the value of (S1-S2)/(S3 + S4) is more than or equal to 0.3, the oil discharge rate of the scroll compressor is low, which is beneficial to ensuring that the pump body assembly 2 of the scroll compressor is well lubricated and improving the performance of the scroll compressor.

In order to illustrate the influence of the values of D/C and (S1-S2)/(S3 + S4) on the exhaust gas oil discharge rate of the scroll compressor, in the present example, in various cases where the values of D/C are different, the oil discharge rate is plotted as a function of (S1-S2)/(S3 + S4), as shown in FIG. 5, it can be seen from FIG. 5 that the oil discharge rate of the scroll compressor is low when D/C is not less than 1 and not more than 2, and (S1-S2)/(S3 + S4) is not more than 0.3.

The provision of the first slot 411, the second slot 412, and the third slot 413 is advantageous for reducing the shrink fit stress between the stator core 41 and the housing 1, and is advantageous for reducing the iron loss of the stator core 41.

Preferably, 3.4 ≦ S3/S2 ≦ 9.7, which further ensures that the lubricant oil flowing out of the diversion channel 51 can flow to the first slot 411 in a larger proportion, and is favorable for ensuring smooth oil return.

Alternatively, in other embodiments of the present invention, the number of the first type of the grooves, the second type of the grooves, and the third type of the grooves may be increased, and in a section of the normal line in the vertical direction, the sectional area of the first type of the grooves is S33, the sectional area of the second type of the grooves is S44, and the sectional area of the third type of the grooves is S55, and preferably 0.1 ≦ (S1-S2)/(S33 + S44) ≦ 0.8, 0.05 ≦ S55/(S33+ S44) ≦ 0.48, 0.5 ≦ S33/(S33+ S44+ S55) ≦ 1; more preferably, in this embodiment, the slots are circumferentially staggered from the exhaust port 11, that is, the slots are not disposed at positions directly below the exhaust port 11, so as to prevent the lubricant oil below the motor 4 from being carried away by a large amount of exhaust gas.

Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, rather than limitations, and that many variations and modifications of the invention are possible to those skilled in the art, without departing from the spirit and scope of the invention.