CN216842226U

CN216842226U - Compressor and cylinder thereof

Info

Publication number: CN216842226U
Application number: CN202123330663.4U
Authority: CN
Inventors: 白桂培; 黄之敏
Original assignee: Shanghai Highly Electrical Appliances Co Ltd
Current assignee: Shanghai Highly Electrical Appliances Co Ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-06-28
Anticipated expiration: 2031-12-27

Abstract

The utility model discloses a compressor and cylinder thereof, compressor cylinder, include: a cylinder body having a compression chamber; the air suction port radially penetrates through the cylinder wall of the cylinder body; and the air suction silencing structure comprises a groove arranged on the axial end face of the cylinder body and a connecting pipe communicated with the groove and the air suction port. The utility model discloses a compressor cylinder can improve the compressor because the noise that suction pressure pulsation leads to.

Description

Compressor and cylinder thereof

Technical Field

The utility model relates to a compressor falls the technical field of making an uproar, especially relates to a compressor and cylinder thereof.

Background

The rolling rotor compressor mainly comprises a shell, a motor, a crankshaft, a piston, a cylinder, blades and the like. The piston is located in the cylinder, and when the crankshaft rotates around the rotation center, the piston clings to the inner surface of the cylinder to perform rotary motion. Therefore, a crescent space can be formed between the outer surface of the piston and the inner surface of the cylinder. The blades reciprocating up and down divide the space into two independent parts, one part is a suction cavity, and the other part is a compression cavity. The vanes are pressed against the outer surface of the piston by means of springs. During the operation of the compressor, gas enters the suction cavity through the suction port of the cylinder, then the gas enters the compression cavity and is compressed through the rotation of the piston, and only the compressed gas is discharged through the exhaust port. During operation of the compressor, vibrations, suction and discharge air flows are affected, which often produce noise.

In order to improve the noise of the compressor, a noise elimination structure is usually added on a compressor exhaust cavity to achieve the purpose of noise reduction. However, it is considered that the compressor generates a large noise in some frequency bands due to the influence of the suction pressure pulsation.

Therefore, how to improve the noise of the compressor caused by the suction pressure pulsation is a technical problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a compressor and cylinder thereof to the not enough among the above-mentioned prior art to improve the compressor because the noise that the suction pressure pulsation leads to.

In order to solve the technical problem, the utility model adopts the following technical scheme:

according to an aspect of the utility model, a provide a compressor cylinder, include:

a cylinder body having a compression chamber;

the air suction port radially penetrates through the cylinder wall of the cylinder body; and

the air suction silencing structure comprises a groove arranged on the axial end face of the air cylinder body and a connecting pipe communicated with the groove and the air suction port.

In some embodiments of the application, further comprising:

a slide groove arranged on the cylinder body,

wherein, the air suction port and the air suction silencing structure are positioned on the same side of the slide sheet groove.

In some embodiments of the application, a projection of the suction port on an axial end surface of the cylinder body covers a projection of the suction silencing structure on an axial end surface of the cylinder body.

In some embodiments of the application, an axial direction of the connecting pipe is parallel to an axial direction of the cylinder body.

In some embodiments of the application, the volume of the groove is inversely related to the length of the connecting tube and the volume of the groove is positively related to the cross-sectional area of the connecting tube at a set resonance frequency.

In some embodiments of the application, at a set resonance frequency, the volume of the groove is inversely proportional to the equivalent length of the connecting tube, which is the sum of the length of the connecting tube and the radius of the connecting tube of a set proportion.

In some embodiments of the application, the groove is arranged coaxially with the connection tube.

In some embodiments of the application, a plurality of axially-through connecting holes are formed in the cylinder body, and the air suction port and the air suction silencing structure avoid the connecting holes.

According to yet another aspect of the present application, there is also provided a compressor including:

a housing forming an accommodating space;

the motor unit is positioned in the accommodating space and comprises a motor rotor and a motor stator;

the pump body unit is positioned in the accommodating space and comprises an upper flange, the compressor cylinder and a lower flange, and the compressor cylinder is positioned between the upper flange and the lower flange;

and the eccentric crankshaft is respectively connected with the motor rotor of the motor mechanism and the pump body unit so as to transmit the rotating force of the motor rotor.

In some embodiments of the application, the number of the compressor cylinders is two, the pump body unit further comprises an intermediate flange, the intermediate flange is located between the two compressor cylinders, and the suction silencing structures of the two compressor cylinders are all arranged on the cylinder body and close to the axial end face of the upper flange.

The air cylinder comprises an air cylinder body, wherein a groove is formed in the axial end face of the air cylinder body, and a connecting pipe communicated with the groove and the air suction port is formed to form an air suction silencing structure, so that the noise at the air suction port of the air cylinder can be improved; simultaneously, the air suction silencing structure can also reduce pressure pulsation in the air suction process, and can improve the performance of the compressor under the high-load working condition.

Drawings

Other features, objects and advantages of the invention will become more apparent from a reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.

Fig. 1 is a schematic view of a compressor according to an embodiment of the present invention.

Fig. 2 is a schematic view of a compressor cylinder according to an embodiment of the present invention.

Fig. 3 is a schematic view of an air suction port and a suction noise reduction structure according to an embodiment of the present invention.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, materials, devices, etc. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising," "having," and "providing" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.

Referring now to fig. 1, fig. 1 is a schematic diagram of a compressor according to an embodiment of the present invention. The compressor 100 includes a housing 110, a motor unit, a pump body unit, and an eccentric crankshaft. The housing 110 forms an accommodating space. The motor unit includes a motor rotor 121 and a motor stator 122, and the motor unit is located in the accommodating space. The pump body unit includes an upper flange 141,

compressor cylinders

131, 132, and a lower flange 142. The

compressor cylinders

131, 132 are located between the upper flange 141 and the lower flange 142. The eccentric crankshafts are coupled to the motor rotors of the motor mechanisms and the pump body unit, respectively, to transmit the rotational force of the motor rotors, thereby achieving compression of gas from the reservoir 150 into the

compressor cylinders

131, 132, respectively, via the

suction ports

133 and 134. The number of compressor cylinders may be one or more. In the present embodiment, the number of compressor cylinders may be two. Thus, the pump block unit may further comprise an intermediate flange 143, the intermediate flange 143 being located between the two

compressor cylinders

131, 132. Only one of the two

compressor cylinders

131, 132 may be provided with a suction noise reduction structure. In other embodiments, both of the

compressor cylinders

131, 132 may be provided with suction silencing features. The air suction silencing structures can be arranged on the axial end face, close to the upper flange, of the cylinder body, so that noise of a specific frequency of an air suction port of the cylinder is improved.

The compressor cylinder of the present application will be described with reference to fig. 2 and 3, and fig. 2 is a schematic view of the compressor cylinder according to an embodiment of the present invention. Fig. 3 is a schematic view of an air suction port and a suction noise reduction structure according to an embodiment of the present invention.

The compressor cylinder 200 includes a cylinder body 210, a suction port 220, and a suction muffler structure 230. The cylinder body 210 has a compression chamber. The suction port 220 radially penetrates through the cylinder wall of the cylinder body 210 to communicate the compression chamber with the suction channel, so that the gas in the accumulator enters the compression chamber via the suction channel and the suction port 220 to be compressed. The suction muffler structure 230 includes a groove 231 formed in an axial end surface of the cylinder body 210, and a connection pipe 232 communicating the groove 231 with the suction port 220. Therefore, the groove 231 on the axial end surface of the cylinder body 210 and the aforementioned upper flange together form a resonance cavity, and the connection pipe 232 connects the resonance cavity and the air suction port 220, so that the gas entering from the air suction port 220 enters the resonance cavity through the connection pipe 232, the pressure in the resonance cavity rises, and the gas is pressed back into the connection pipe 232, so as to realize resonance with a set frequency, and alleviate the noise with the set frequency at the air suction port 220. Meanwhile, the gas entering from the gas suction port 220 enters the resonant cavity through the connecting pipe 232, so that the pressure pulsation in the gas suction process can be reduced, and the performance of the compressor can be improved under the high-load working condition.

In some specific implementations, the compressor cylinder 200 further includes a sliding vane slot 240 disposed in the cylinder body 210, and the sliding vane slot 240 is used for pushing the sliding vane to reciprocate in the sliding vane slot, so as to divide the cavity of the cylinder body into a suction chamber and a compression chamber. In this embodiment, the air suction port 220 and the air suction silencing structure 230 are located on the same side of the sliding sheet groove 240, so that when the air suction port 220 and the air suction silencing structure 230 are located on two sides of the sliding sheet groove 240, the length of the connecting pipe 232 of the air suction silencing structure 230 is too long, and the manufacturing difficulty caused by bending is reduced, and the length of the connecting pipe 232 is reduced, so as to improve the silencing effect.

In some specific implementations, the projection of the suction port 220 on the axial end surface of the cylinder body 210 covers the projection of the suction muffler structure 230 on the axial end surface of the cylinder body 210. Therefore, the area of the groove 231 can be reduced, and the length of the connecting pipe 232 can be reduced, so as to facilitate the manufacture of the suction silencing structure 230.

In some specific implementations, the axial direction of the connection pipe 232 is parallel to the axial direction of the cylinder body 210. Therefore, the length of the connection pipe 232 can be further reduced, and the connection pipe 232 can be conveniently positioned in the perforation direction when the connection pipe 232 is perforated by the same axial direction as the cylinder body 210.

In some embodiments, the groove 231 and the connection tube 232 are coaxially disposed, so as to facilitate the manufacturing process of the groove 231 and the connection tube 232.

In some specific implementations, a plurality of connecting holes are axially formed in the cylinder body 210, and the air suction port 220 and the air suction noise reduction structure 230 are disposed to avoid the connecting holes, so as to prevent mutual influence between the holes in the cylinder body 210.

Specifically, the resonance frequency f of the suction muffler structure 230 may be calculated based on the following equation:

wherein, c₀The sound velocity in the air can be taken as 343 m/s; s is the sectional area of the connecting pipe 232, l_aIs an equivalent length of the connecting pipe 232, V₀Is the volume of the resonant cavity.

Thus, the combination of the volume of the recess 231, the length of the connection pipe 232, and the sectional area of the connection pipe 232 can be calculated and adjusted as necessary at a set resonance frequency. For example, at a set resonant frequency, the volume of the groove is inversely related to the length of the connecting tube and the volume of the groove is positively related to the cross-sectional area of the connecting tube.

Further, since the air column in the connection pipe 232 radiates sound waves into the cavity when moving, the equivalent length l of the connection pipe 232_aL is the length of connecting tube 232 and r is the radius of the connecting tube, l +0.85 r. Therefore, at a set resonance frequency, the volume of the groove is inversely proportional to the equivalent length of the connecting tube, which is the sum of the length of the connecting tube and the radius of the connecting tube in a set proportion.

Therefore, the air cylinder has the advantages that the air cylinder is provided with the groove arranged on the axial end face of the air cylinder body and the connecting pipe communicated with the groove and the air suction port to form an air suction silencing structure, so that the noise at the air suction port of the air cylinder can be improved; simultaneously, the air suction silencing structure can also reduce pressure pulsation in the air suction process, and can improve the performance of the compressor under the high-load working condition.

Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". Other relative terms, such as "high," "low," "top," "bottom," "left," "right," and the like are also intended to have similar meanings. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.

In the description of the present specification, references to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," etc., indicate that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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

Claims

1. A compressor cylinder, comprising:

a cylinder body having a compression chamber;

the air suction silencing structure comprises a groove arranged on the axial end surface of the cylinder body and a connecting pipe communicated with the groove and the air suction port,

under the set resonance frequency, the volume of the groove is inversely related to the length of the connecting pipe, the volume of the groove is positively related to the sectional area of the connecting pipe, the volume of the groove is inversely proportional to the equivalent length of the connecting pipe, and the equivalent length of the connecting pipe is the sum of the length of the connecting pipe and the radius of the connecting pipe in a set proportion.

2. The compressor cylinder of claim 1, further comprising:

a sliding vane slot arranged on the cylinder body,

wherein, the suction port and the suction silencing structure are positioned on the same side of the sliding sheet groove.

3. The compressor cylinder of claim 1, wherein a projection of the suction port on an axial end surface of the cylinder body covers a projection of the suction muffler structure on an axial end surface of the cylinder body.

4. The compressor cylinder of claim 1, wherein an axial direction of the connecting tube is parallel to an axial direction of the cylinder body.

5. The compressor cylinder of claim 1, wherein the groove is disposed coaxially with the connecting tube.

6. The compressor cylinder as claimed in claim 1, wherein the cylinder body is provided with a plurality of connecting holes axially therethrough, and the suction port and the suction muffler structure are evacuated from the connecting holes.

7. A compressor, comprising:

a housing forming an accommodating space;

a pump body unit located in the accommodating space and comprising an upper flange, a compressor cylinder according to any one of claims 1 to 6 and a lower flange, the compressor cylinder being located between the upper flange and the lower flange;

and the eccentric crankshaft is respectively connected with the motor rotor of the motor unit and the pump body unit so as to transmit the rotating force of the motor rotor.

8. The compressor according to claim 7, wherein the number of said compressor cylinders is two, said pump body unit further comprises an intermediate flange located between said two compressor cylinders, and suction muffling structures of both said compressor cylinders are provided on an axial end face of said cylinder body near said upper flange.