CN114017333A

CN114017333A - Rotary compressor and refrigeration equipment with same

Info

Publication number: CN114017333A
Application number: CN202111313377.9A
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: 2022-02-08
Anticipated expiration: 2041-11-08
Also published as: CN114017333B

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 plate is arranged in the outer shell, and an inner cavity of the outer shell is divided into an upper cavity and a lower cavity by the partition plate; the inner shell is connected with the outer shell and positioned in the upper cavity; the pump body component is arranged in the inner shell; one end of the air suction pipe is connected with the pump body assembly, and the other end of the air suction pipe is connected with the partition plate and communicated with the lower cavity; wherein, the baffle is provided with first mounting hole, and the inner wall of first mounting hole is equipped with two at least annular grooves, is equipped with the elastic component in the annular groove, and in the first mounting hole was worn to locate by the breathing pipe to with elastic component interference fit, through the aforesaid setting, can make breathing pipe and elastic component form the cooperation and reach good sealed effect, reduced the vibration transmission of the outside casing of pump body subassembly 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 same.

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 rotate to complete the compression of the refrigerant vapor. The compressor is more suitable for small refrigeration equipment, and particularly, is more widely applied to household air conditioners.

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

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a rotary compressor, which can realize the sealing of a suction pipe joint under preset pressure and improve the vibration and noise reduction effect of the rotary compressor.

The invention also provides refrigeration equipment with the rotary compressor.

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 inside the outer shell and divides an inner cavity of the outer shell into an upper cavity and a lower cavity; 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; one end of the air suction pipe is connected to the pump body assembly, and the other end of the air suction pipe is connected to the partition plate and communicated with the lower cavity; the air suction pipe comprises a partition plate, an air suction pipe and an air suction pipe, wherein the partition plate is provided with a first mounting hole, the inner wall of the first mounting hole is provided with at least two annular grooves, elastic pieces are arranged in the annular grooves, and the air suction pipe penetrates through the first mounting hole to be in interference fit with the elastic pieces.

The rotary compressor provided by the embodiment of the invention has at least the following beneficial effects: be equipped with two at least annular grooves through the inner wall at first mounting hole to be equipped with the elastic component in the annular groove, the breathing pipe is worn to locate in the first mounting hole, with elastic component interference fit, so that breathing pipe and elastic component form the cooperation and reach good sealed effect, can reduce the vibration transmission of the outside casing of pump body subassembly 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 pump body assembly includes a lower bearing having a second mounting hole, the suction pipe being rigidly connected to the second mounting hole.

According to some embodiments of the invention, the inner housing is connected to the outer housing by a flexible member.

According to some embodiments of the invention, the inner housing is provided as a cylindrical structure, and both ends of the cylindrical structure are respectively connected with the outer housing through the flexible members.

According to some embodiments of the invention, the partition plate is provided with a boss, and the first mounting hole penetrates through the boss.

According to some embodiments of the invention, the annular groove is provided in two, wherein at least one annular groove is located on the boss.

According to some embodiments of the invention, the resilient member is a rubber ring.

According to some embodiments of the invention, the inner diameter d2 of the rubber ring and the outer diameter d1 of the air suction pipe satisfy: 0.2mm < (d2-d1) <0.8 mm.

According to some embodiments of the invention, the rubber ring is in an interference fit with the annular groove in a radial direction.

According to some embodiments of the invention, the inner diameter d2 and the outer diameter d3 of the rubber ring satisfy: 2mm < (d3-d2)/2<5 mm.

According to some embodiments of the invention, the inner diameter d2 and the outer diameter d3 of the rubber ring and the outer diameter d4 of the annular groove satisfy: 0.02(d3-d4) < (d3-d2) <0.08(d3-d 4).

According to some embodiments of the invention, the rubber ring is axially clearance fitted with the annular groove.

According to some embodiments of the invention, the inner diameter d2 and the outer diameter d3 of the rubber ring and the height h1 of the annular groove satisfy: ((d3-d2)/2+0.2mm) < h1< ((d3-d2)/2+2 mm).

The refrigeration equipment according to the second aspect embodiment of the invention comprises the rotary compressor according to the first aspect embodiment 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 the first aspect embodiment, its vibration is less, and sealed effectual, can promote the reliability of refrigerating system pipeline, improves the noise problem by the vibration production 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 following figures and examples, in which:

fig. 1 is a 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 sectional view of a partition plate of a rotary compressor according to some embodiments of the present invention;

fig. 4 is a schematic structural view of a rubber ring of a rotary compressor according to some embodiments of the present invention;

fig. 5 is a flow chart illustrating an assembly process of a sealing structure of a rotary compressor according to some embodiments of the present invention.

Reference numerals:

the rotary compressor comprises a rotary compressor 100, an outer shell 101, an inner shell 102, a gas suction pipe 103, a motor 104, a pump body assembly 105, a partition plate 106, an upper cavity 107, a lower cavity 108, a lower bearing 109, a gas inlet pipe 110, a flexible piece 111 and a cylinder 112;

an annular groove 201, a rubber ring 202 and a boss 203;

the first mounting hole 301.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to, for example, the upper, lower, inner, outer, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

The rotary compressor is a compressor widely applied to refrigeration equipment at present, and a motor of the rotary compressor directly drives a piston to rotate to complete compression of a refrigerant without converting the rotating motion of a rotor into reciprocating motion of the piston.

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-expansion gas, so that the rotary air compressor has the advantages of high compression efficiency, few parts, small volume, light weight, good balance performance, low noise, complete protection measures, low power consumption and the like. With the progress of technology, the rotary compressor has obvious advantages over other types of compressors, and is widely applied to household air conditioners, refrigerators and other electric appliances.

In the related art, the rotary compressor includes a housing, a pump body assembly, a motor, and a suction pipe, wherein a connection portion of a port of the suction pipe needs to satisfy a sealing property under a certain pressure, for example, a sealing property under a pressure of 3MPa to 4 MPa.

In addition, the reliability of the refrigerating system pipeline can be influenced by the vibration problem between the pump body assembly, the motor and other moving parts and the shell of the rotary compressor, the sealing performance of the connection position of the air suction pipe is included, the use experience of a user can be greatly influenced by the medium-high frequency noise generated by vibration, and the overall quality of the refrigerating equipment is influenced.

To this end, some embodiments of the first aspect of the invention propose a rotary compressor 100, illustrated in particular with reference to figures 1 to 4 of the accompanying drawings.

Referring to fig. 1 and 2, in some embodiments, the 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, an inner cavity is formed inside an outer shell 101 of the rotary compressor 100 of the present invention, a partition 106 is disposed in the inner cavity, and the partition 106 divides the inner cavity of the outer shell 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; a pump body assembly 105 is also disposed within the inner housing 102; the suction pipe 103 has one end connected to the pump body assembly 105 and the other end connected to the partition 106, and the lower end of the suction pipe 103 communicates with the lower chamber 108.

In order to avoid that the vibration of the pump body assembly 105 is directly transmitted to the outer shell 101 through the air suction pipe 103 by the partition plate 106, the partition plate 106 is provided with a first mounting hole 301, the inner wall of the first mounting hole 301 is provided with at least two annular grooves 201, an elastic part is arranged in the annular grooves 201, and the air suction pipe 103 is arranged in the first mounting hole 301 in a penetrating manner, so that the elastic part can isolate the vibration of the air suction pipe 103 which is directly transmitted to the partition plate 106.

It is understood that the inside of the outer shell 101 of the rotary compressor 100 is also provided with the motor 104 (shown in fig. 1) and some piping systems, and the lower part of the outer shell 101 is also connected with an air inlet pipe 110, and the air inlet pipe 110 is communicated with the lower cavity 108 of the outer shell 101 for providing the lower cavity 108 with the gas to be compressed.

It should be noted that two, three, four or more annular grooves 201 may be disposed on the inner wall of the first mounting hole 301, and correspondingly, an elastic member is disposed in the annular groove 201, and the annular groove 201 is used for accommodating the elastic member and positioning the elastic member to a certain extent.

It can be understood that the more the number of the elastic pieces is, the better sealing effect can be achieved on the connecting section of the air suction pipe 103, if only one annular groove 201 and one elastic piece are arranged, the required sealing performance of 3MPa to 4MPa pressure can not be achieved, and meanwhile, the vibration isolation effect can not meet the requirement.

It can be understood that, in order to achieve a better sealing effect, the elastic member and the air suction pipe 103 are in an interference fit, and the interference fit enables the elastic member to have good sealing performance under a certain pressure (for example, 3MPa to 4MPa) after the air suction pipe 103 is sealed.

According to the rotary compressor 100 of the embodiment of the invention, the at least two annular grooves 201 are arranged on the inner wall of the first mounting hole 301, the elastic member is arranged in the annular grooves 201, and the air suction pipe 103 is arranged in the first mounting hole 301 in a penetrating manner, so that the air suction pipe 103 and the elastic member are matched to achieve a good sealing effect, and the required sealing performance of the connecting section of the air suction pipe 103 under the pressure of 3 to 4MPa is met.

It is understood that the diameters of at least two of the annular grooves 201 may be equal or different, as long as the corresponding sealing effect is achieved.

It will also be appreciated that the resilient member may be made of nitrile butadiene rubber, ethylene propylene diene monomer rubber, viton, silicone, fluorosilicone rubber, nylon, polyurethane, engineering plastics, or the like.

Meanwhile, the arrangement can reduce the vibration transmission of the pump body assembly 105 to the outer shell 101, the reliability of a refrigerating system pipeline is improved, and the problem of noise generated by vibration is solved.

In addition, in order to reduce the 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 preventing sound from being transmitted to the outside can be added, and the motor 104 and the pump assembly 105 are arranged inside the inner casing 102, so that the vibration of the motor 104 and the pump assembly 105 can be prevented from being directly transmitted to the outer casing 101, and the overall performance of the rotary compressor 100 can be improved.

Referring to fig. 1, it should be noted that the pump body assembly 105 includes a cylinder 112 and a lower bearing 109 connected to the lower side of the cylinder 112, the lower bearing 109 has a second mounting hole, the air suction pipe 103 is rigidly connected to the second mounting hole, and the air suction pipe 103 is communicated with the inside of the cylinder 112, and finally the gas to be compressed in the lower cavity 108 can enter the inside of the cylinder 112 through the air suction pipe 103.

In some embodiments, referring to fig. 1, the inner housing 102 is connected to the outer housing 101 by a flexible member 111. The flexible member 111 can buffer the vibration, so that the vibration of the inner housing 102 is buffered by the flexible member 111, thereby preventing the vibration of the motor 104 and the pump assembly 105 from being directly transmitted to the outer housing 101.

It should be noted that the flexible member 111 is a flexible element, such as a flexible connector for a pipe, which may have relatively small rigidity in six directions, and can be slightly deformed by 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 housing 102 is provided as a cylindrical structure, and both ends of the cylindrical structure are connected to the outer housing 101 through the flexible members 111, respectively.

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

It is understood that, referring to fig. 2, the partition 106 is provided with a boss 203, and the first mounting hole 301 penetrates the boss 203. With this arrangement, the fitting surface between the suction pipe 103 and the partition plate 106 can be increased, so that the connection strength between the suction pipe 103 and the partition plate 106 can be increased, the structural strength of the partition plate 106 itself can be increased, and the service life of the rotary compressor 100 can be prolonged.

It will also be appreciated that, with reference to figure 2, there are two annular grooves 201, one 201 being located on the boss 203 and the other 201 being located on the baffle 106. From this setting, can let two annular groove 201 interval distribution, it is better to the sealed effect of suction pipe 103, and the damping effect is better.

It should be noted that, depending on the thickness of the partition 106 and the boss 203, for example, the partition 106 has a smaller thickness, the boss 203 has a larger thickness, and the annular groove 201 may be disposed on the boss 203.

It should also be noted that the two annular grooves 201 may be the same or different in structural dimension, and in the example shown in fig. 2, the two annular grooves may be the same in structural dimension to facilitate machining.

In some embodiments, the resilient member is a rubber ring 202 to achieve a corresponding sealing effect.

It can be understood that the rubber material belongs to a common engineering sealing material, and has the advantages of low price, stable performance and good oxidation resistance.

Specifically, the rubber ring 202 may be made of butadiene-acrylonitrile rubber, ethylene propylene diene monomer rubber, fluorine rubber, fluorosilicone rubber, or the like.

It can be understood that the rubber ring 202 and the air suction pipe 103 are in interference fit, so that after the elastic member seals the air suction pipe 103, the elastic member can have good sealing performance under a certain pressure (for example, 3MPa to 4MPa), and can play a role in vibration isolation.

Specifically, in some embodiments, referring to fig. 2, 3 and 4, the inner diameter d2 of the rubber ring 202 and the outer diameter d1 of the air suction pipe 103 satisfy the formula one:

0.2mm < (d2-d1) <0.8mm (formula one).

It is understood that although the rubber rings 202 in the embodiments of fig. 2 and 3 have the same size structure, the formula one above is also satisfied when at least two rubber rings 202 have different sizes.

It can be understood that if the size of (d2-d1) is too small, a good sealing effect cannot be achieved, and if the size of (d2-d1) is too large, the vibration isolation effect of the rubber ring 202 is reduced, and it is inconvenient to fit the rubber ring 202 on the air suction pipe 103.

It will be appreciated that the rubber ring 202 is in interference fit with the annular groove 201 in the radial direction, thereby enabling a radial seal of the rubber ring 202 with the annular groove 201.

Specifically, in some embodiments, referring to fig. 3 and 4, the inner diameter d2 and the outer diameter d3 of the rubber ring 202 satisfy the formula two:

2mm < (d3-d2)/2<5mm (formula two).

It can be understood that (d3-d2) represents the thickness of the rubber ring, and when the sizes of at least two rubber rings 202 are different, the above formula two is also satisfied, and in addition, it can be understood that if the rubber rings are too thin, a good sealing effect cannot be achieved, and when the rubber rings are too thick, the vibration isolation effect of the rubber rings 202 is reduced.

It is further noted that, in some embodiments, referring to fig. 3 and 4, the inner diameter d2 and the outer diameter d3 of the rubber ring 202 and the outer diameter d4 of the annular groove 201 satisfy the formula three:

0.02(d3-d4) < (d3-d2) <0.08(d3-d4) (formula three).

It can be understood that, when the sizes of the at least two rubber rings 202 and the annular groove 201 are different, the above formula three is also satisfied, and in addition, it can be understood that the thickness of the rubber ring 202 and the outer diameter d4 of the annular groove 201 satisfy the above formula three, and when a good sealing effect is achieved, the vibration isolation effect of the rubber ring 202 is improved.

It should be further noted that, in some embodiments, as shown in fig. 3, the rubber ring 202 is in clearance fit with the annular groove 201 in the axial direction, so that a certain play margin is provided for the air suction pipe 103 in the axial direction, and when the pump body assembly 105 is in operation, the air suction pipe 103 has a certain vibration release space when vibrating, thereby improving the cushioning performance of the whole sealing structure.

Specifically, in some embodiments, referring to fig. 3 and 4, the inner diameter d2 and the outer diameter d3 of the rubber ring 202 and the height h1 of the annular groove 201 satisfy the formula four:

((d3-d2)/2+0.2mm) < h1< ((d3-d2)/2+2mm) (formula four).

It can be understood that the above formula four is also satisfied when the sizes of the at least two rubber rings 202 and the annular groove 201 are different, and furthermore, it can be understood that if the size of h1 is too small, a good vibration damping effect cannot be achieved, and if the size of h1 is too large, the sealing effect of the sealing structure is reduced.

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

Referring to fig. 5, the assembly process includes the following steps:

step S510: the air suction pipe 103 is fixedly connected with a lower bearing 109;

step S520: placing the rubber ring 202 into the annular groove 201 of the first mounting hole 301 of the partition plate 106;

step S530: the pump body assembly 105 with the air suction pipe 103 attached to the inner shell in communication is integrally placed on the partition plate 106, and the air suction pipe 103 penetrates through the first mounting hole 301 of the partition plate 106.

A refrigerating apparatus (not shown) according to an embodiment of the second aspect of the present invention includes the rotary compressor 100 according to the embodiment of the first aspect of the present invention.

It should be noted that the refrigeration equipment (not shown in the figures) of the present invention is mainly used for food refrigeration, various goods refrigeration and air temperature regulation, and mainly comprises a compressor, an expansion valve, an evaporator, a condenser, accessories and pipelines. The rotary compressor can be a household air conditioner or a refrigerator and other refrigeration equipment, 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 do rotary motion to complete the compression of a refrigerant, and the rotary compressor is more suitable for household air conditioners, refrigerators and other electrical appliances.

The refrigeration equipment provided by the embodiment of the invention has at least the following beneficial effects: by adopting the rotary compressor 100 of the first embodiment, the vibration is small, the sealing effect is good, the reliability of a refrigeration system pipeline can be improved, and the problem of noise generated by vibration is solved, so that the overall performance of refrigeration equipment is improved.

The embodiments of the present invention are described in detail above with reference to the accompanying drawings, and finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rotary compressor, characterized by comprising:

the inner cavity of the outer shell is divided into an upper cavity and a lower cavity by the partition plate;

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

the pump body assembly is arranged in the inner shell;

one end of the air suction pipe is connected with the pump body assembly, and the other end of the air suction pipe is connected with the partition plate and communicated with the lower cavity;

the air suction pipe comprises a partition plate, an air suction pipe and an air suction pipe, wherein the partition plate is provided with a first mounting hole, the inner wall of the first mounting hole is provided with at least two annular grooves, elastic pieces are arranged in the annular grooves, and the air suction pipe penetrates through the first mounting hole to be in interference fit with the elastic pieces.

2. The rotary compressor of claim 1, wherein the pump body assembly includes a lower bearing having a second mounting hole, the suction pipe being rigidly connected to the second mounting hole.

3. The rotary compressor of claim 1, wherein the inner shell is connected to the outer shell by a flexible member.

4. The rotary compressor of claim 3, wherein the inner housing is provided in a cylindrical structure, and both ends of the cylindrical structure are connected to the outer housing through the flexible members, respectively.

5. The rotary compressor of claim 1, wherein the partition plate is provided with a boss, and the first mounting hole penetrates the boss.

6. The rotary compressor of claim 5, wherein the annular groove is provided in two, at least one of the annular grooves being located on the boss.

7. The rotary compressor of claim 1, wherein the elastic member is a rubber ring.

8. The rotary compressor of claim 7, wherein the inner diameter d2 of the rubber ring and the outer diameter d1 of the suction pipe satisfy: 0.2mm < (d2-d1) <0.8 mm.

9. The rotary compressor of claim 7, wherein the rubber ring is in interference fit with the annular groove in a radial direction.

10. The rotary compressor of claim 9, wherein the inner diameter d2 and the outer diameter d3 of the rubber ring satisfy: 2mm < (d3-d2)/2<5 mm.

11. The rotary compressor of claim 9 or 10, wherein the inner diameter d2 and the outer diameter d3 of the rubber ring and the outer diameter d4 of the annular groove satisfy: 0.02(d3-d4) < (d3-d2) <0.08(d3-d 4).

12. The rotary compressor of claim 7, wherein the rubber ring is axially clearance fitted with the annular groove.

13. The rotary compressor of claim 12, wherein the inner diameter d2 and the outer diameter d3 of the rubber ring and the height h1 of the annular groove satisfy: ((d3-d2)/2+0.2mm) < h1< ((d3-d2)/2+2 mm).

14. A refrigerating apparatus comprising a rotary compressor of any one of claims 1 to 13.