CN218717500U

CN218717500U - Compressor and refrigeration plant

Info

Publication number: CN218717500U
Application number: CN202222655861.6U
Authority: CN
Inventors: 赵文钊; 高强; 吴多更; 童为政; 赵杰
Original assignee: Guangdong Meizhi Precision Manufacturing Co Ltd
Current assignee: Guangdong Meizhi Precision Manufacturing Co Ltd
Priority date: 2022-10-09
Filing date: 2022-10-09
Publication date: 2023-03-24
Anticipated expiration: 2032-10-09

Abstract

The utility model discloses a compressor and refrigeration equipment, the compressor comprises a shell and a buffer structure, two compression cavities are formed in the shell in a separated way, and the two compression cavities comprise a first compression cavity and a second compression cavity which are communicated in sequence; one end of the buffer structure is connected with the air outlet of the first compression cavity, the other end of the buffer structure is connected with the air inlet of the second compression cavity, the buffer structure comprises a buffer tank, the buffer tank is arranged outside the shell, an external buffer cavity is formed in the buffer tank, so that the gas discharged from the first compression cavity is buffered in the external buffer cavity and flows into the second compression cavity. The utility model provides an among the technical scheme, through setting up the buffer tank to set up external cushion chamber, eliminated the volume of compressor and to the volumetric restriction of cushion chamber, thereby increase the volume of cushion chamber, promote the pulsatory improvement effect of breathing in of current two-stage compressor.

Description

Compressor and refrigeration plant

Technical Field

The utility model relates to a refrigeration plant field especially relates to a compressor and refrigeration plant.

Background

The two-stage compressor is widely applied to the field of low-temperature heating. At present, in order to avoid the suction pulsation of the first-stage compression part and the second-stage compression part, an intermediate cavity is arranged in a shell, and the existing design of the intermediate cavity is generally arranged in the shell of the compressor, but the volume of the intermediate cavity is limited by the volume of the compressor, so that the volume of the intermediate cavity is smaller, and the improvement effect on the suction pulsation is poorer.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a compressor and refrigeration plant aims at promoting current two-stage compressor's the pulsatory improvement effect of breathing in.

To achieve the above object, the present invention provides a compressor, including:

the compressor comprises a shell, a first compression chamber and a second compression chamber, wherein the shell is internally divided into two compression chambers, and the two compression chambers comprise a first compression chamber and a second compression chamber which are sequentially communicated; and the number of the first and second groups,

buffer structure, buffer structure's one end connect in the gas vent in first compression chamber, the other end is connected in the air inlet in second compression chamber, buffer structure includes the buffer tank, locates the outside of casing, just the buffer tank is formed with external cushion chamber in it, so that first compression chamber combustion gas is in buffering in the external cushion chamber flows into extremely the second compression chamber.

Optionally, the buffer structure further includes a built-in buffer cavity disposed in the housing, and the built-in buffer cavity is connected in series with the external buffer cavity.

Optionally, the air inlet of the internal buffer cavity is communicated with the air outlet of the first compression cavity, and the air outlet of the external buffer cavity is communicated with the air inlet of the second compression cavity.

Optionally, the compressor further includes an air suction pipe, the air suction pipe is communicated with the external buffer cavity and the second compression cavity, at least a part of one end of the air suction pipe extends into the external buffer cavity, an aperture of an air suction port at one end of the air suction pipe extending into the external buffer cavity is r, a length of the air suction pipe extending into the external buffer cavity is L, wherein L is greater than 1.5r and less than 10r.

Optionally, L is more than 1.5r and less than 5r.

Optionally, L is more than 1.5r and less than 3r.

Optionally, two flanges and a partition plate between the two flanges are arranged in the casing, wherein the two flanges and the partition plate are spaced from each other to form two compression chambers.

Optionally, the first compression cavity is located above the second compression cavity, and the built-in buffer cavity is disposed in one of the two flanges located above; or,

the first compression cavity is positioned below the second compression cavity, and the built-in buffer cavity is arranged in one of the two flanges positioned below.

Optionally, at least one of the flanges includes a flange main body and a flange end cover, and the flange main body and the flange end cover surround to form the built-in buffer cavity.

To achieve the above object, the present application also proposes a refrigeration device comprising a compressor as described above.

The utility model provides an among the technical scheme, through setting up the buffer tank to set up external cushion chamber, eliminated the volumetric restriction of compressor's volume to the cushion chamber, thereby increaseed the volume of cushion chamber, promote the pulsatory improvement effect of breathing in of current two-stage compressor.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

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

fig. 2 is a schematic perspective view of another embodiment of the compressor according to the present invention.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

In order to solve the above problem, the present invention provides a compressor 100 and a refrigeration device, and fig. 1 to 2 illustrate a specific embodiment of the compressor 100.

Referring to fig. 1 to 2, the compressor 100 includes a shell 10 and a buffer structure 20, two compression cavities are partitioned in the shell 10, and the two compression cavities include a first compression cavity 11 and a second compression cavity 12 which are sequentially communicated; one end of the buffer structure is connected to the exhaust port of the first compression cavity 11, the other end is connected to the air inlet of the second compression cavity 12, the buffer structure 20 comprises a buffer tank 21 and is arranged outside the casing 10, an external buffer cavity 22 is formed in the buffer tank 21, and therefore the gas discharged from the first compression cavity 11 is buffered in the external buffer cavity 22 and flows into the second compression cavity 12.

With the arrangement, after being compressed in the first compression cavity 11, the refrigerant gas is discharged into the external buffer cavity 22 for buffering, the suction pulsation is eliminated, and then the refrigerant gas enters the second compression cavity 12 for secondary compression.

It should be noted that, a compression assembly is further disposed in the compressor 100, the compression assembly includes a first-stage compression portion disposed in the first compression cavity 11 and a second-stage compression portion disposed in the second compression cavity 12, a crankshaft is disposed in the middle of the compressor 100, a first piston and a second piston are disposed on the periphery of the crankshaft at intervals in the vertical direction, the first-stage compression portion includes the first piston, a cylinder and a slider, the second-stage compression portion includes the second piston, a first lower flange 40 and a second cylinder, a partition plate 50 is disposed between the first piston and the second piston, when the crankshaft is driven to rotate by the driving motor, the first piston and the second piston are driven to rotate, and the crankshaft drives the two pistons to eccentrically rotate, so that the pistons can be far away from and close to the bottom wall of the cylinder, and compression is achieved. The compressor 100 further includes

It should be emphasized that the specific implementation form of the buffer structure 20 is not limited, and it may include only the buffer tank 21, and two ends of the buffer tank 21 are directly connected to the exhaust port of the first compression chamber 11 and the intake port of the second compression chamber 12, respectively, so that the gas exhausted from the first compression chamber 11 is buffered in the buffer tank 21, and flows into the second compression chamber 12 to perform the secondary compression, and of course, it may also include other buffer cavities, for example, a buffer cavity in the housing 10, an external other buffer tank 21, and the like, which are not limited herein. The specific form of the buffer chamber in the buffer tank 21 is not limited, and may be a large buffer chamber, a combination of a plurality of small buffer chambers connected to each other, or the like, and is not limited herein.

The utility model provides an among the technical scheme, through setting up buffer tank 21 to set up external cushion chamber 22, eliminated the volumetric restriction of compressor 100's volume to the cushion chamber, thereby increaseing the volume of cushion chamber, promote the pulsatory improvement effect of breathing in of current two-stage compressor 100, and, through setting up external cushion chamber 22, the volume of the cushion chamber in compressor 100 casing 10 can compress, is in even can not set up the cushion chamber again in compressor 100's the casing 10, thereby optimizes compressor 100's inner structure, has improved compressor 100's inner structure.

In order to increase the amount of the gaseous refrigerant in the internal compression cavity, the buffer tank 21 is further provided with an air return pipe, and the air return pipe is used for communicating a condenser in the refrigeration system so as to recover the redundant refrigerant in the condenser into the external compression cavity.

Meanwhile, in order to enhance the improvement effect on the suction disturbance, the buffer structure 20 further includes an internal buffer cavity 13 disposed in the housing 10, the internal buffer cavity 13 is connected in series with the external buffer cavity 22, so that the gas refrigerant compressed in the first stage by the first compression cavity 11 passes through the internal buffer cavity 13 and the external buffer cavity 22 respectively, flows into the second compression cavity 12 after being buffered twice, and can obviously improve the suction disturbance after being buffered twice.

It should be noted that, in this embodiment, the air suction port of the internal buffer cavity 13 may be connected to the air discharge port of the first compression cavity 11, and the air discharge port of the external buffer cavity 22 may be connected to the second compression cavity 12, so that the gas refrigerant after being subjected to the first-stage compression in the first compression cavity 11 is buffered by the internal buffer cavity 13 and the external buffer cavity 22 in sequence. Of course, the air suction port of the external buffer cavity 22 may be connected to the air discharge port of the first compression cavity 11, and the air discharge port of the internal buffer cavity 13 may be connected to the second compression cavity 12, so that the gas refrigerant after being subjected to the first-stage compression by the first compression cavity 11 passes through the external buffer cavity 22 and the internal buffer cavity 13 to be buffered, which is not limited herein.

Further, the air inlet of the internal buffer cavity 13 is communicated with the air outlet of the first compression cavity 11, and the air outlet of the external buffer cavity 22 is communicated with the air inlet of the second compression cavity 12, so that the gas refrigerant after being subjected to the first-stage compression by the first compression cavity 11 passes through the internal buffer cavity 13 and the external buffer cavity 22 for buffering, flows into the second compression cavity 12 for compression, is discharged through the exhaust pipe of the compressor 100, and then enters the system for refrigeration cycle.

Meanwhile, in order to reduce the gas flow loss, the compressor 100 further includes a suction pipe 30, the suction pipe 30 is communicated with the external buffer cavity 22 and the second compression cavity 12, and one end of the suction pipe 30 at least partially extends into the external buffer cavity 22, and a diameter of a suction port at an end of the suction pipe 30 extending into the external buffer cavity 22 is r, and a length of the suction pipe 30 extending into the external buffer cavity 22 is L, wherein 1.5r < L < 10r, it is understood that the diameter of the suction port cannot be too small, otherwise, the gas flow loss is too large, and therefore, the length L of the suction pipe 30 extending into the external buffer cavity 22 is less than ten times the diameter of the suction port, that is, the diameter of the suction port is greater than one tenth, one but less than one tenth, of the length of the suction pipe 30 extending into the external buffer cavity 22, and the gas flow loss is too large, but also cannot be too large, the gas flow loss cannot be reduced, and the performance of the compressor 100 is also affected to a certain extent, therefore, the length of the suction pipe 30 r is less than two thirds of the diameter of the external buffer cavity 22.

Further, the aperture of the air suction port is properly increased, so that the air flow loss can be further reduced, therefore, 1.5r is less than L and less than 5r, and the length L of the air suction pipe 30 extending into the external buffer cavity 22 is less than five times the aperture of the air suction port, that is, the aperture of the air suction port is greater than one fifth of the length of the air suction pipe 30 extending into the external buffer cavity 22.

Preferably, experiments prove that when the L is more than 1.5r and less than 3r, the gas flow loss is minimum, and the performance of the engine is best.

Meanwhile, in order to achieve multi-stage buffering in the casing 10 of the conventional compressor 100, a plurality of buffer cavities are generally formed at intervals by the partition plates 50, and in this embodiment, it is no longer necessary to provide a plurality of buffer cavities in the casing 10 of the compressor 100, and therefore, two flanges 40 and the partition plate 50 between the two flanges 40 are provided in the casing 10, wherein the two flanges 40 and the partition plate 50 are spaced from each other to form two compression cavities, so that the design of the upper and lower partition plates 50 in the casing 10 of the conventional compressor 100 can be eliminated, and the reliability of the compressor 100 can be increased.

The position of the internal buffer cavity 13 in the housing 10 is not limited, the internal buffer cavity 13 may be located at a position where the first-stage cylinder is far from the second-stage cylinder side flange 40, the middle partition plate 50 between the first-stage compression portion and the second-stage compression portion, and the position where the second-stage cylinder is far from the first-stage cylinder side flange 40, where no limitation is made here, but the internal buffer cavity 13 is located at the partition plate 50, and no matter the middle partition plate 50 or the upper and lower partition plates 50 may cause the span of the crankshaft eccentric portion to become large, and even affect the reliability of the compressor 100, so that the compressor 100 fails in advance, the first compression cavity 11 is located above the second compression cavity 12, and the internal buffer cavity 13 is located above the second compression cavity 40, and then the internal buffer cavity 13 is located above the two flanges 40, so configured, after the first compression cavity 11 located above compresses the gas refrigerant for the first time, discharges the gas refrigerant into the internal buffer cavity 12 for the second compression, and then the gas refrigerant flows into the second compression cavity 12 for the second compression, and the internal buffer cavity 13 is located above the first compression cavity 13, and the reliability of the compressor is improved, and the compressor 100 is effectively improved in the scheme that the first compression cavity 10 is located inside the flange 40.

Of course, the first compression cavity 11 may be located below the second compression cavity 12, and the built-in buffer cavity 13 is disposed in one of the two flanges 40 located below, and is configured such that after the first compression cavity 11 located below compresses the gas refrigerant for the first time, the gas refrigerant is discharged from the built-in buffer cavity 13 in the flange 40 located below, and is subjected to first-stage buffering, and then enters the external buffer cavity 22 to be subjected to second-stage buffering, and then flows into the second compression cavity 12 to be subjected to second-stage compression, so that compared with a scheme in which the built-in buffer cavity 13 is disposed at the partition plate 50, a phenomenon in which a span of an eccentric portion of the crankshaft is enlarged can be effectively avoided, and reliability of the compressor 100 is improved, and moreover, the built-in buffer cavity 13 is disposed in the flange 40 adjacent to the first compression cavity 11, and compared with a scheme in the flange 40 located away from the first compression cavity, a path of the gas in the casing 10 is reduced, and performance of the compressor 100 is improved.

Further, the formation of the built-in buffer cavities 13 is not limited, in this embodiment, at least one of the flanges 40 includes a flange main body 41 and a flange end cover 42, the flange main body 41 and the flange end cover 42 surround the built-in buffer cavity 13, and correspondingly, when the first compression cavity 11 is located below, the flange 40 located below includes the flange main body 41 and the flange end cover 42, so as to surround the built-in buffer cavity 13, and when the first compression cavity 11 is located above, the flange 40 located above includes the flange main body 41 and the flange end cover 42, so as to surround the built-in buffer cavity 13.

The compressor 100 further includes a gas-liquid separator 5 and an air feed pipe 6, and since the refrigerant may undergo phase change due to factors such as temperature in a flow path for heat exchange, in order to enable the compressor 100 to compress gaseous refrigerant and avoid liquid compression, the gas-liquid separator 5 may separate gaseous and liquid refrigerant, and the air feed pipe communicates a refrigerant output port of the gas-liquid separator 5 and an air inlet of the first compression cavity 11, and conveys separated refrigerant gas to the first compression cavity 11 through the air feed pipe.

In order to make the structure of the compressor 100 more compact, in this embodiment, the compressor 100 further includes a gas-liquid separator 5 for supplying a refrigerant to the first compression chamber 11; the gas-liquid separator 5, the enthalpy increasing assembly and the air suction pipe 30 are arranged at intervals in the circumferential direction of the casing 1. So set up for the overall arrangement is compacter succinct.

The utility model provides a refrigeration plant, refrigeration plant includes foretell compressor 100, because refrigeration plant includes compressor 100, this compressor 100's concrete structure refers to above-mentioned embodiment, because this refrigeration plant's compressor 100 has adopted all technical scheme of above-mentioned all embodiments, refrigeration setting can be refrigerator, air conditioner etc. does not do the injeciton here, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. A compressor, comprising:

buffer structure, one end connect in the gas vent in first compression chamber, the other end is connected in the air inlet in second compression chamber, buffer structure includes the buffer tank, locates the outside of casing, just the buffer tank is formed with external cushion chamber in it, so that first compression chamber combustion gas is in buffering in the external cushion chamber flows into extremely the second compression chamber.

2. The compressor of claim 1, wherein the buffer structure further comprises an internal buffer chamber disposed within the housing, the internal buffer chamber being serially connected to the external buffer chamber.

3. The compressor as claimed in claim 2, wherein an inlet port of said internal cushion chamber is communicated with an outlet port of said first compression chamber, and an outlet port of said external cushion chamber is communicated with an inlet port of said second compression chamber.

4. The compressor of claim 3, further comprising a suction pipe, wherein the suction pipe is communicated with the external buffer chamber and the second compression chamber, one end of the suction pipe at least partially extends into the external buffer chamber, an aperture of a suction port of one end of the suction pipe extending into the external buffer chamber is r, and a length of the suction pipe extending into the external buffer chamber is L, wherein 1.5r < L < 10r.

5. A compressor according to claim 4, wherein 1.5r < L < 5r.

6. A compressor according to claim 5, wherein 1.5r < L < 3r.

7. The compressor of claim 2, wherein two flanges and a partition between said two flanges are disposed in said housing, wherein said two flanges and said partition are spaced apart to form two of said compression chambers.

8. The compressor of claim 7 wherein said first compression chamber is located above said second compression chamber, said internal buffer chamber being disposed in an upper one of said two flanges; or,

9. The compressor of claim 8, wherein at least one of said flanges includes a flange body and a flange end cap, said flange body and said flange end cap enclosing said internal buffer cavity.

10. A refrigeration apparatus, characterized by comprising a compressor according to any one of claims 1 to 9.