CN114017332B

CN114017332B - Rotary compressor and refrigeration equipment with same

Info

Publication number: CN114017332B
Application number: CN202111313363.7A
Authority: CN
Inventors: 宋世功; 邓志强; 张肃
Original assignee: Guangdong Meizhi Compressor Co Ltd; Guangdong Meizhi Precision Manufacturing Co Ltd
Current assignee: Guangdong Meizhi Compressor Co Ltd; Guangdong Meizhi Precision Manufacturing Co Ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2023-06-06
Anticipated expiration: 2041-11-08
Also published as: CN114017332A

Abstract

The invention belongs to the technical field of compressors, and particularly discloses a rotary compressor and refrigeration equipment with the same, wherein the rotary compressor comprises an outer shell, an inner shell, a pump body assembly and an air suction pipe, a partition board is arranged in the outer shell, the partition board divides an inner cavity of the outer shell into an upper cavity and a lower cavity, and a second mounting hole is formed in the partition board; the inner shell is connected with the outer shell and is positioned in the upper cavity; the pump body assembly is arranged in the inner shell and comprises a lower bearing, and the lower bearing is provided with a first mounting hole; one end of the air suction pipe penetrates through the first mounting hole, and the other end of the air suction pipe penetrates through the second mounting hole and is communicated with the lower cavity; wherein, be provided with in the first mounting hole with breathing pipe interference fit's first annular sealing member, be provided with in the second mounting hole with breathing pipe interference fit's second annular sealing member, set up from this can reach good sealed effect, can reduce the vibration transmission of pump body subassembly to the shell body simultaneously, promote the reliability of refrigerating system pipeline, improve the noise problem that produces by the vibration.

Description

Rotary compressor and refrigeration equipment with same

Technical Field

The invention relates to the technical field of compressors, in particular to a rotary compressor and refrigeration equipment with the rotary compressor.

Background

In the rotary compressor, the motor does not need to convert the rotary motion of the rotor into the reciprocating motion of the piston, but directly drives the rotary piston to perform rotary motion so as to compress the refrigerant vapor. The compressor is more suitable for small refrigeration equipment, and particularly has wider application in household air conditioners.

The rotary compressor comprises an outer shell, a pump body assembly, a motor, an air suction pipe and other parts, and the reliability of a system pipeline of the refrigeration equipment can be affected by vibration problems between the pump body assembly, the motor and other moving parts and the outer shell of the rotary compressor, for example, the tightness of the joint of the air suction pipe is improved, and the use experience of a user can be affected by noise problems generated by vibration.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the rotary compressor, which can realize the sealing of the suction pipe joint under the preset pressure and improve the vibration and noise reduction effect of the rotary compressor.

The invention also provides refrigeration equipment with the rotary compressor.

According to an embodiment of the first aspect of the invention, the rotary compressor comprises an outer shell, an inner shell, a pump body assembly and an air suction pipe, wherein a partition plate is arranged in the outer shell, the partition plate divides an inner cavity of the outer shell into an upper cavity and a lower cavity, and a second mounting hole is formed in the partition plate; the inner shell is connected with the outer shell and is positioned in the upper cavity; the pump body assembly is arranged in the inner shell and comprises a lower bearing, and the lower bearing is provided with a first mounting hole; one end of the air suction pipe penetrates through the first mounting hole, and the other end of the air suction pipe penetrates through the second mounting hole and is communicated with the lower cavity; the first mounting hole is internally provided with a first annular sealing piece in interference fit with the air suction pipe, and the second mounting hole is internally provided with a second annular sealing piece in interference fit with the air suction pipe.

The rotary compressor provided by the embodiment of the invention has at least the following beneficial effects: through be provided with in first mounting hole with breathing pipe interference fit's first annular sealing spare, be provided with in the second mounting hole with breathing pipe interference fit's second annular sealing spare, wear to locate first mounting hole with the one end of breathing pipe in, the other end wears to locate in the second mounting hole, can make breathing pipe and first annular sealing spare and second annular sealing spare form the cooperation and reach good sealed effect, can reduce the vibration transmission of pump body subassembly to the shell body simultaneously, promote the reliability of refrigerating system pipeline, improve the noise problem that produces by the vibration.

According to some embodiments of the invention, the inner wall of the first mounting hole is provided with a first annular groove for accommodating the first annular seal; the inner wall of the second mounting hole is provided with a second annular groove for accommodating the second annular sealing element.

According to some embodiments of the invention, the first mounting hole comprises a first hole facing the partition plate and a second hole facing away from the partition plate, the diameter d1 of the first hole, the diameter d2 of the second hole and the outer diameter d5 of the suction pipe satisfying: d2 < d5 < d1;

the second mounting hole comprises a third hole facing the lower bearing and a fourth hole facing away from the lower bearing, and the diameter d3 of the third hole, the diameter d4 of the fourth hole and the diameter d5 satisfy: d4 < d5 < d3; the first annular groove is formed in the inner wall of the first hole, and the second annular groove is formed in the inner wall of the third hole.

According to some embodiments of the invention, the d5 and d1 satisfy: d1-d5 is less than or equal to 0.05mm and less than or equal to 0.2mm;

said d5 and said d3 satisfy: the diameter of the steel plate is less than or equal to 0.05mm and less than or equal to (d 3-d 5) and less than or equal to 0.2mm.

According to some embodiments of the invention, the outer diameter d6, the inner diameter d7 of the first annular seal and the diameter d8 of the first annular groove satisfy: 0.02 (d 6-d 7) is less than or equal to (d 6-d 8) and less than or equal to 0.08 (d 6-d 7);

the outer diameter d9, the inner diameter d10 of the second annular seal and the diameter d11 of the second annular groove satisfy: 0.025 (d 9-d 10) is less than or equal to (d 9-d 11) and less than or equal to 0.08 (d 9-d 10).

According to some embodiments of the invention, the outer diameter d6, the inner diameter d7 of the first annular seal and the height h1 of the first annular groove along the axial direction of the first bore satisfy: ((d 6-d 7)/2+0.2mm). Ltoreq.h1.ltoreq. ((d 6-d 7)/2+2mm);

the outer diameter d9, the inner diameter d10 of the second annular seal and the height h2 of the second annular groove along the axial direction of the second hole satisfy: ((d 9-d 10)/2+0.2mm). Ltoreq.h2.ltoreq. ((d 9-d 10)/2+2mm).

According to some embodiments of the present invention, the rotary compressor has a first thrust surface between the first hole and the second hole, and a second thrust surface between the third hole and the fourth hole, and a distance d12 between the first thrust surface and the second thrust surface and the suction pipe length L satisfy: the diameter of the steel plate is more than or equal to 0.2mm and less than or equal to (d 12-L) and less than or equal to 2mm.

According to some embodiments of the invention, the inner diameter d7 of the first annular seal and the outer diameter d5 of the suction pipe satisfy: d5-d7 is less than or equal to 0.2mm and less than or equal to 0.8mm;

the inner diameter d10 of the second annular seal and the outer diameter d5 of the suction pipe satisfy: the diameter of the steel plate is more than or equal to 0.2mm and less than or equal to (d 5-d 10) and less than or equal to 0.8mm.

According to some embodiments of the invention, the outer diameter d6 and the inner diameter d7 of the first annular seal satisfy: d6-d7 of 2mm or more/2 or less than 5mm;

the outer diameter d9 and the inner diameter d10 of the second annular seal member satisfy: the ratio of d9-d10 to 2mm is less than or equal to 2mm and less than or equal to 5mm.

A refrigeration appliance according to an embodiment of the second aspect of the invention comprises a rotary compressor according to an embodiment of the first aspect of the invention.

The refrigeration equipment provided by the embodiment of the invention has at least the following beneficial effects: through adopting the rotary compressor of embodiment of first aspect, its vibration is less, and sealed effectual, can promote the reliability of refrigerating system pipeline, improve the noise problem that produces by the vibration to promote refrigeration plant's wholeness ability.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a cross-sectional view of a rotary compressor according to some embodiments of the present invention;

FIG. 2 is a partial schematic view of FIG. 1 at A;

FIG. 3 is a cross-sectional view of a lower bearing of a rotary compressor according to some embodiments of the present invention;

FIG. 4 is a cross-sectional view of a diaphragm of a rotary compressor in accordance with some embodiments of the present invention;

FIG. 5 is a schematic view of a first annular seal of a rotary compressor according to some embodiments of the present invention;

FIG. 6 is a schematic illustration of a second annular seal of a rotary compressor according to some embodiments of the present invention;

fig. 7 is a flow chart of an assembly process of a sealing structure of a rotary compressor according to some embodiments of the present invention.

Reference numerals:

rotary compressor 100, outer housing 101, inner housing 102, suction pipe 103, motor 104, pump body assembly 105, partition 106, upper chamber 107, lower chamber 108, lower bearing 109, suction pipe 110, flexible member 111, cylinder 112;

a first annular seal 201, a second annular seal 202;

a first bore 301, a second bore 302, a first annular groove 303;

a third bore 401, a fourth bore 402, a second annular recess 403.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that references to orientation, such as the orientation or positional relationship indicated above, below, inside, outside, etc., are based on the orientation or positional relationship shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, the description of the first, second, third, and fourth are only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.

In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

The rotary compressor is a type of compressor widely applied to refrigeration equipment at present, and a motor of the rotary compressor does not need to convert the rotary motion of a rotor into the reciprocating motion of a piston, but directly drives the piston to perform rotary motion to compress the refrigerant.

The main advantages of the rotary compressor are: because the piston rotates, the compression work is smooth, stable and balanced.

In addition, the rotary air compressor has no clearance volume and no interference of re-expanding gas, so that the rotary air compressor has the advantages of high compression efficiency, less parts, small volume, light weight, good balance performance, low noise, complete protective measures, low power consumption and the like. With the progress of technology, the rotary compressor has obvious advantages over other types of compressors, is widely applied to household air conditioners, refrigerators and other electrical appliances, and becomes a dominant product in the market from the trend of development.

In the related art, the rotary compressor comprises an outer shell, a pump body assembly, a motor, an air suction pipe and other parts, wherein the joint of the port of the air suction pipe needs to meet the sealing performance under certain pressure, for example, the sealing performance under the pressure of 3MPa to 4 MPa.

In addition, the vibration problem between the outer casing of motion parts such as pump body subassembly and motor and rotary compressor can influence the reliability of refrigerating system pipeline, including the leakproofness of breathing pipe junction, the well high frequency noise that produces by the vibration also can greatly influence user's use experience, influences refrigerating plant's whole quality.

To this end, some embodiments of the first aspect of the present invention provide a rotary compressor 100, particularly with reference to fig. 1 to 6 of the drawings of the specification.

Referring to fig. 1 and 2, in some embodiments, a rotary compressor 100 includes an outer casing 101, an inner casing 102, a pump body assembly 105, a suction pipe 103, and the like.

Specifically, referring to fig. 1 to 3, the rotary compressor 100 of the present invention has an inner cavity formed in an inner portion of an outer casing 101, a partition 106 is provided in the inner cavity, and the partition 106 divides the inner cavity of the outer casing 101 into an upper cavity 107 and a lower cavity 108; the inner housing 102 is connected to the outer housing 101, and the inner housing 102 is located in the upper chamber 107; pump body assembly 105 is also disposed within inner housing 102; one end of the air suction pipe 103 is connected to the pump body assembly 105, the other end is connected to the partition plate 106, and the lower end of the air suction pipe 103 is communicated with the lower cavity 108.

Referring to fig. 1, 2 and 3, it should be noted that the pump body assembly 105 includes a cylinder 112 and a lower bearing 109 connected to a lower side of the cylinder 112, the lower bearing 109 has a first mounting hole, the air suction pipe 103 is connected to the first mounting hole, and the air suction pipe 103 is communicated with an interior of the cylinder 112, so that the air to be compressed in the lower chamber 108 can enter the interior of the cylinder 112 through the air suction pipe 103.

Referring to fig. 1, 2 and 3, the partition 106 is provided with a second mounting hole, one end of the air suction pipe 103 is inserted into the first mounting hole, and the other end of the air suction pipe 103 is inserted into the second mounting hole and is communicated with the lower cavity 108; wherein, a first annular sealing piece 201 in interference fit with the air suction pipe 103 is arranged in the first mounting hole, and a second annular sealing piece 202 in interference fit with the air suction pipe 103 is arranged in the second mounting hole.

In the prior art, when the air suction pipe 103 is rigidly fixed in the first mounting hole of the pump body assembly 105, vibration energy is easily transferred to the air suction pipe 103, and then the air suction pipe 103 transfers the vibration outwards; with this arrangement, the vibration of the pump body assembly 105 can be reduced by using the first annular sealing member 201 and transmitted to the air suction pipe 103, and meanwhile, the vibration of the air suction pipe 103 directly transmitted to the partition 106 is reduced by using the first annular sealing member 201, so that the vibration transmission from the pump body assembly to the outer shell is reduced, the reliability of the pipeline of the refrigeration system is improved, and the noise problem caused by the vibration is improved.

Through experiments, compared with the common rigid connection mode, the noise can be reduced by more than 30% by adopting the arrangement.

On the other hand, through the arrangement, the air suction pipe 103, the first annular sealing piece 201 and the second annular sealing piece 202 are matched to achieve a good sealing effect, and the required sealing performance of the connecting end of the air suction pipe 103 under the pressure of 3MPa to 4MPa is met.

It will be appreciated that the rotary compressor 100 further has a motor 104 (shown in fig. 1) and some piping inside the outer casing 101, and that an air inlet pipe 110 is connected to the lower part of the outer casing 101, and that the air inlet pipe 110 communicates with the lower chamber 108 of the outer casing 101 for supplying the lower chamber 108 with the gas to be compressed.

It is understood that the first and second

annular seals

201, 202 may be made of butyl cyanide rubber, ethylene propylene diene rubber, fluororubber, silicone rubber, fluorosilicone rubber, nylon, polyurethane, engineering plastic, or the like.

In addition, in order to reduce transmission of vibration noise to the outside, the casing of the rotary compressor 100 is provided with the outer casing 101 and the inner casing 102, so that a barrier for blocking outward transmission of sound can be added, and meanwhile, the motor 104 and the pump body assembly 105 are provided inside the inner casing 102, so that vibration of the motor 104 and the pump body assembly 105 can be prevented from being directly transmitted to the outer casing 101, thereby contributing to improving overall performance of the rotary compressor 100.

Referring to fig. 3, in order to limit the first annular seal 201, the inner wall of the first mounting hole is provided with a first annular groove 303 for accommodating the first annular seal 201, and it is understood that the first annular seal 201 and the first annular groove 303 are in an interference fit state in a radial direction, thereby achieving sealing and vibration damping effects of the first annular seal 201.

Accordingly, in order to limit the second annular seal 202, the inner wall of the second mounting hole is provided with a second annular groove 403 for accommodating the second annular seal 202, and it is also understood that the second annular seal 202 and the second annular groove 403 are in an interference fit state in the radial direction, thereby achieving the sealing and vibration damping effects of the second annular seal 202.

It should be noted that, the inner walls of the first mounting hole and the second mounting hole may be provided with two, three, four or more annular grooves, and the annular grooves are correspondingly provided with annular sealing elements, and the annular grooves are used for accommodating the annular sealing elements and playing a certain role in positioning the annular sealing elements.

It will be appreciated that the greater the number of annular seals, the better the sealing effect on the connecting section of the suction duct 103.

It is understood that the diameters of the first annular groove 303 and the second annular groove 403 may be equal or unequal, so long as the corresponding sealing effect is achieved, and the structural dimensions of the same first annular seal 201 and second annular seal 202 may be equal or unequal.

In some embodiments, referring to fig. 1, the inner housing 102 is coupled to the outer housing 101 by a flexible member 111. The flexible member 111 can play a role in buffering vibration, so that the vibration of the inner housing 102 is buffered by the flexible member 111, and therefore the vibration of the motor 104 and the pump body assembly 105 can be prevented from being directly transmitted to the outer housing 101 as much as possible.

It should be noted that the flexible member 111 is a flexible member, such as a flexible connection member for a pipe, which may have relatively small rigidity in six directions, respectively, and may be slightly deformed by being subjected to a force.

Specifically, the flexible member 111 may be made of rubber, gel, elastic plastic, or the like.

It should be noted that, referring to fig. 1, the inner case 102 is provided in a cylindrical structure, and both ends of the cylindrical structure are connected to the outer case 101 via flexible members 111, respectively.

The casing structure of the rotary compressor 100 can be simply constructed, the casing structure of the rotary compressor 100 is stable, vibration transmission of the motor 104 and the pump body assembly 105 is reduced, and leakage of noise is reduced.

It will also be appreciated that the spacer 106 is provided with a boss (not shown) to which the second mounting hole is provided. With this arrangement, the structural strength of the partition 106 itself can be improved, and the service life of the rotary compressor 100 can be prolonged.

Also, not shown in the drawings, a boss (not shown in the drawings) may be provided on the lower bearing 109, and the second mounting hole may be provided on the boss.

In some embodiments, referring to fig. 3, the first mounting hole and the second mounting hole are both configured as a stepped hole, which can well position the upper end and the lower end of the air suction pipe 103, so as to prevent the air suction pipe 103 from moving out of the mounting position in the use process.

Specifically, referring to fig. 3, the first mounting hole includes a first hole 301 toward the partition 106 and a second hole 302 away from the partition 106, and a diameter d1 of the first hole 301, a diameter d2 of the second hole 302, and an outer diameter d5 of the suction pipe 103 satisfy formula one:

d2 < d5 < d1 (formula one);

with this arrangement, the suction pipe 103 can be prevented from coming out of the second hole 302.

Meanwhile, the second mounting hole includes a third hole 401 toward the lower bearing 109 and a fourth hole 402 away from the lower bearing 109, and a diameter d3 of the third hole 401, a diameter d4 of the fourth hole 402, and an outer diameter d5 of the suction pipe 103 satisfy the formula two:

d4 < d5 < d3 (formula two);

Wherein, the first annular groove 303 is disposed on the inner wall of the first hole 301, and the second annular groove 403 is disposed on the inner wall of the third hole 401.

By the arrangement, the upper end of the air suction pipe 103 can be limited by the thrust surface between the first hole 301 and the second hole 302; the lower end of the suction pipe 103 is limited by a thrust surface between the third hole 401 and the fourth hole 402.

It will be appreciated that in order to achieve a good sealing effect, the first annular seal 201 is provided as an interference fit with the suction duct 103, and that in order to cooperate with the mounting of the first annular seal 201, a clearance fit is required between the first annular seal 201 and the suction duct 103.

Specifically, in some embodiments, referring to fig. 2, 3, and 5, the outer diameter d5 of the suction pipe 103 and the diameter d1 of the first hole 301 satisfy the formula three:

d1-d5 is less than or equal to 0.05mm and less than or equal to 0.2mm (formula III);

it will be appreciated that (d 1-d 5) may be set to 0.05mm, 0.08mm, 0.15mm, 0.2mm, etc., whereby setting can be made to leave a mounting location for the first annular seal 201.

Similarly, referring to fig. 2, 4, and 5, the outer diameter d5 of the suction pipe 103 and the diameter d3 of the third hole 401 satisfy the formula four:

the thickness of the material is less than or equal to 0.05mm and less than or equal to (d 3-d 5) and less than or equal to 0.2mm (formula IV).

It is understood that (d 3-d 5) may be set to 0.05mm, 0.08mm, 0.15mm, 0.2mm, or the like.

Referring to fig. 2, 3, and 5, the outer diameter d6 of the first annular seal 201, the inner diameter d7 of the first annular seal 201, and the diameter d8 of the first annular groove 303 satisfy the formula five:

0.02 (d 6-d 7) is less than or equal to (d 6-d 8) is less than or equal to 0.08 (d 6-d 7) (formula five);

similarly, referring to fig. 2, 4, and 5, the outer diameter d9 of the second annular seal 202, the inner diameter d10 of the second annular seal 202, and the diameter d11 of the second annular groove 403 satisfy the formula six:

0.025 (d 9-d 10) is less than or equal to (d 9-d 11) and less than or equal to 0.08 (d 9-d 10) (formula six).

It can be understood that the thickness of the first annular seal 201 and the diameter d8 of the first annular groove 303 satisfy the above formula five, and the thickness of the second annular seal 202 and the diameter d11 of the second annular groove 403 satisfy the above formula six, so that the vibration isolation effect of the first annular seal 201 and the second annular seal 202 is improved while achieving a good sealing effect.

It should be further noted that, in some embodiments, the first annular seal 201 and the first annular groove 303 are in clearance fit in the axial direction, and at the same time, the second annular seal 202 and the second annular groove 403 are in clearance fit in the axial direction, so that a certain activity allowance can be provided for the air suction pipe 103 in the axial direction, and when the pump body assembly 105 operates, the air suction pipe 103 has a certain vibration release space in the axial direction when vibrating, so as to promote the buffering performance of the whole sealing structure.

Specifically, in some embodiments, referring to fig. 3 and 5, the outer diameter d6 of the first annular seal 201, the inner diameter d7 of the first annular seal 201, and the height h1 of the first annular groove 303 along the axial direction of the first hole 301 satisfy the formula seven:

((d 6-d 7)/2+0.2mm). Ltoreq.h1.ltoreq. ((d 6-d 7)/2+2mm) (equation seven).

Similarly, referring to fig. 4 and 6, the outer diameter d9 of the second annular seal 202, the inner diameter d10 of the second annular seal 202, and the height h2 of the second annular groove 403 along the axial direction of the second hole 302 satisfy the formula eight:

((d 9-d 10)/2+0.2mm). Ltoreq.h2.ltoreq. ((d 9-d 10)/2+2mm) (equation eight).

It will be appreciated that equation seven shows the structural relationship between the first annular seal 201 and the first annular groove 303 in the axial direction, equation eight shows the structural relationship between the second annular seal 202 and the second annular groove 403 in the axial direction, and if the sizes of h1 and h2 are too small, a good vibration damping effect cannot be achieved, and when the sizes of h1 and h2 are too large, the sealing effect of the sealing structure is reduced.

It is required that, in order to achieve a better sealing effect, after the first annular sealing member 201 and the second sealing member seal the air suction pipe 103, the sealing member can have a good sealing performance under a certain pressure (for example, 3MPa to 4 MPa), and the inner diameter d7 of the first annular sealing member 201 and the outer diameter d5 of the air suction pipe 103 satisfy the formula nine (refer to fig. 3 and 5):

the thickness of the steel plate is less than or equal to 0.2mm (d 5-d 7) and less than or equal to 0.8mm (formula nine).

It is understood that (d 5-d 7) may be set to 0.2mm, 0.4mm, 0.6mm, 0.8mm, or the like.

Similarly, referring to fig. 4 and 5, the inner diameter d10 of the second annular seal 202 and the outer diameter d5 of the intake pipe 103 satisfy the formula ten:

the thickness of the steel plate is less than or equal to 0.2mm (d 5-d 10) and less than or equal to 0.8mm (formula ten).

It is understood that (d 5-d 10) may be set to 0.2mm, 0.4mm, 0.6mm, 0.8mm, or the like.

It will be appreciated that the structural dimensions of the first annular seal 201 and the second annular seal 202 may be the same or different, so long as the above-described formulas nine and ten are satisfied.

It will also be appreciated that if the dimensions (d 5-d 7) and (d 5-d 10) are too small, a good sealing effect cannot be achieved, and when the dimensions (d 5-d 7) and (d 5-d 10) are too large, the vibration isolation effect of the first and second

annular seals

201 and 202 is reduced, and it is inconvenient to fit the first and second

annular seals

201 and 202 over the suction pipe 103.

Referring to fig. 5, an outer diameter d6 of first annular seal 201 and an inner diameter d7 of first annular seal 201 satisfy formula eleven:

2mm is less than or equal to (d 6-d 7)/2 is less than or equal to 5mm (formula eleven);

it is understood that (d 6-d 7) may be set to 2mm, 4mm, 5mm, or the like.

Likewise, the outer diameter d9 of the second annular seal 202 and the inner diameter d10 of the second annular seal 202 satisfy equation twelve:

the ratio of d9-d10 to 2mm is less than or equal to 2mm and less than or equal to 5mm (formula twelve).

It is understood that (d 9-d 10) may be set to 2mm, 4mm, 5mm, or the like.

It will be further appreciated that (d 6-d 7) and (d 9-d 10) are characterized by the thickness of the first annular seal 201 and the second annular seal 202, respectively, and if the first annular seal 201 and the second annular seal 202 are too thin, a good sealing effect cannot be achieved, and if the first annular seal 201 and the second annular seal 202 are too thick, the vibration isolation effect of the first annular seal 201 and the second annular seal 202 is reduced.

It should be further noted that the distance d12 between the first thrust surface and the second thrust surface and the length L of the air intake pipe 103 satisfy the formula thirteen:

the thickness of the steel plate is less than or equal to 0.2mm and less than or equal to (d 12-L) and less than or equal to 2mm (formula thirteen).

It is understood that (d 12-L) may be set to 0.2mm, 0.8mm, 1mm, 2mm, or the like.

It will be appreciated that the first annular seal 201 and the first annular groove 303 are in clearance fit in the axial direction, and at the same time, the second annular seal 202 and the second annular groove 403 are in clearance fit in the axial direction, so that a certain activity allowance can be provided for the air suction pipe 103 in the axial direction, when the pump body assembly 105 operates, the air suction pipe 103 has a certain vibration release space in the axial direction when vibrating, so that the buffer performance of the whole sealing structure is improved, and in order to match the structure, the vibration of the air suction pipe 103 in the axial direction needs to be limited within a certain range, and the air suction pipe 103 is prevented from being separated from an effective sealing area.

The process of assembling the above-described sealing structure of the lower rotary compressor 100 is described below with reference to fig. 1 and 2.

Referring to fig. 7, the assembly process includes the steps of:

step S710: placing the first annular seal 201 and the second annular seal 202 into the first mounting hole of the lower bearing 109 and the second mounting hole of the bulkhead 106, respectively;

step S720: inserting the suction pipe 103 into the second mounting hole of the partition 106;

step S730: the inner shell 102 and the pump body assembly 105 with the air suction pipe 103 are integrally arranged on the partition plate 106, so that the air suction pipe 103 penetrates through the first mounting hole of the lower bearing 109;

step S740: the inner housing 102 is integrally put into the outer housing 101.

A refrigeration appliance (not shown en route) according to an embodiment of the second aspect of the present invention includes a rotary compressor 100 according to an embodiment of the first aspect of the present invention.

It should be noted that the refrigerating device of the present invention may be a refrigerating device such as a household air conditioner or a refrigerator, the motor of the rotary compressor does not need to convert the rotary motion of the rotor into the reciprocating motion of the piston, but directly drives the piston to perform the rotary motion to compress the refrigerant, and the rotary compressor is more suitable for household air conditioners, refrigerators and other appliances.

The refrigeration equipment provided by the embodiment of the invention has at least the following beneficial effects: in the rotary compressor of the embodiment of the first aspect, the first annular sealing member 201 in interference fit with the air suction pipe 103 is disposed in the first mounting hole, the second annular sealing member 202 in interference fit with the air suction pipe 103 is disposed in the second mounting hole, one end of the air suction pipe 103 is arranged in the first mounting hole in a penetrating manner, and the other end of the air suction pipe is arranged in the second mounting hole in a penetrating manner, so that the air suction pipe 103, the first annular sealing member 201 and the second annular sealing member 202 form a good sealing effect, meanwhile, vibration transmission of the pump body assembly 105 to the outer shell 101 can be reduced, reliability of a pipeline of the refrigeration equipment is improved, noise caused by vibration is improved, and by adopting the rotary compressor 100 of the embodiment of the first aspect, the reliability of the pipeline of the refrigeration equipment is improved, the noise caused by vibration is improved, and therefore the overall performance of the refrigeration equipment is improved.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, and finally, it should be described that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rotary compressor, comprising:

the inner cavity of the outer shell is divided into an upper cavity and a lower cavity by the partition plate, and the partition plate is provided with a second mounting hole;

an inner housing connected to the outer housing and located in the upper cavity;

the pump body assembly is arranged in the inner shell and comprises a lower bearing, and the lower bearing is provided with a first mounting hole;

one end of the air suction pipe penetrates through the first mounting hole, and the other end of the air suction pipe penetrates through the second mounting hole and is communicated with the lower cavity;

a first annular sealing element in interference fit with the air suction pipe is arranged in the first mounting hole, and a second annular sealing element in interference fit with the air suction pipe is arranged in the second mounting hole;

the first mounting hole comprises a first hole facing the partition plate and a second hole facing away from the partition plate, and the second mounting hole comprises a third hole facing the lower bearing and a fourth hole facing away from the lower bearing; the inner wall of the first hole is provided with a first annular groove for accommodating the first annular sealing element; the inner wall of the third hole is provided with a second annular groove for accommodating the second annular sealing element; a first thrust surface is arranged between the first hole and the second hole, a second thrust surface is arranged between the third hole and the fourth hole, and the distance d12 between the first thrust surface and the second thrust surface and the length L of the air suction pipe satisfy the following conditions: the diameter of the steel plate is more than or equal to 0.2mm and less than or equal to (d 12-L) and less than or equal to 2mm.

2. The rotary compressor of claim 1, wherein a diameter d1 of the first hole, a diameter d2 of the second hole, and an outer diameter d5 of the suction pipe satisfy: d2 < d5 < d1;

the diameter d3 of the third hole, the diameter d4 of the fourth hole, and the d5 satisfy: d4 < d5 < d3.

3. The rotary compressor of claim 2, wherein d5 and d1 satisfy: d1-d5 is less than or equal to 0.05mm and less than or equal to 0.2mm;

4. The rotary compressor of claim 2, wherein the outer diameter d6, inner diameter d7 of the first annular seal and the diameter d8 of the first annular groove satisfy: 0.02 (d 6-d 7) is less than or equal to (d 6-d 8) and less than or equal to 0.08 (d 6-d 7);

5. The rotary compressor of claim 2, wherein an outer diameter d6, an inner diameter d7 of the first annular seal and a height h1 of the first annular groove along an axial direction of the first bore satisfy: ((d 6-d 7)/2+0.2mm). Ltoreq.h1.ltoreq. ((d 6-d 7)/2+2mm);

6. The rotary compressor of claim 1, wherein an inner diameter d7 of the first annular seal and an outer diameter d5 of the suction pipe satisfy: d5-d7 is less than or equal to 0.2mm and less than or equal to 0.8mm;

7. The rotary compressor of claim 1, wherein an outer diameter d6 and an inner diameter d7 of the first annular seal satisfy: d6-d7 of 2mm or more/2 or less than 5mm;

8. A refrigeration apparatus comprising a rotary compressor as claimed in any one of claims 1 to 7.