CN216691454U - Cylinder for rotary compressor, rotary compressor and refrigeration cycle device - Google Patents

Abstract

The utility model relates to the field of compressors, in particular to a cylinder for a rotary compressor, which comprises a cylinder body, a suction inlet, a discharge outlet and a compression chamber, wherein the suction inlet and the discharge outlet are arranged on the cylinder body; the rotary compressor and the refrigeration cycle device comprising the cylinder are also designed. According to the utility model, the plurality of sections of the convex parts are added on the inner side wall of the fabrication hole at the tail end of the blade groove of the air cylinder, so that the effective thickness between the blade groove and the outer diameter of the air cylinder can be increased, the structural strength and rigidity of the air cylinder are increased, the air cylinder is effectively prevented from being broken or deformed, the normal operation of the rotary compressor is ensured, and the service life of equipment is prolonged.

Description

Cylinder for rotary compressor, rotary compressor and refrigeration cycle device

Technical Field

The utility model relates to the field of compressors, in particular to a cylinder for a rotary compressor, the rotary compressor and a refrigeration cycle device.

Background

At present, a common rotary compressor mainly comprises a cylinder, an upper support, a lower support, a crankshaft, a piston, blades and the like, wherein the blades and the piston divide the volume in the cylinder into a high-pressure side and a low-pressure side, a refrigerating fluid is sucked from a suction inlet of the low-pressure side and is discharged from a discharge outlet of the high-pressure side, and the crankshaft drives the piston to operate, so that the volume of the low-pressure side is continuously enlarged, and the volume of the high-pressure side is continuously reduced, thereby realizing the function of the gas compressor. The piston pushes the blade to reciprocate in the blade groove, and the tail end of the blade is supported by a spring to ensure that the blade is kept in contact with the piston. Along with the improvement of pump body efficiency, the cylinder height reduces gradually, and corresponding blade reciprocating motion range is increasing, and the volume of whole compressor in the trade seeks littleer and littleer, and in order to hold the activity space of blade, the thickness between the circular arc tail end of blade groove and the cylinder external diameter is littleer and more, and intensity also is littleer and more, makes the cylinder break and warp very easily like this.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects that the volume of the whole compressor in the industry in the background art is pursued to be smaller and smaller, in order to accommodate the moving space of the blade, the thickness between the arc tail end of the blade groove and the outer diameter of the cylinder is smaller and smaller, and the strength is lower and lower, so that the cylinder is easy to break and deform, and the cylinder, the rotary compressor and the refrigeration cycle device for the rotary compressor are provided. The utility model can enhance the strength and toughness of the cylinder.

In order to solve the technical problems, the utility model adopts the technical scheme that: the cylinder for the rotary compressor comprises a cylinder body, a suction inlet and a discharge outlet which are arranged on the cylinder body, and a compression chamber which is arranged in the middle of the cylinder body, wherein a blade groove is arranged between the suction inlet and the discharge outlet along the radial direction, one end, far away from the compression chamber, of the blade groove is a fabrication hole, a mounting hole which is perpendicular to the fabrication hole is formed in the inner side wall of the fabrication hole, and a plurality of protruding parts which are distributed at intervals are further arranged on the two sides of the mounting hole along the axial direction of the inner side wall of the fabrication hole respectively. In this way, the refrigerant fluid enters the low-pressure side of the compression chamber from the suction port, and the fluid compressed in the compression chamber is discharged from the discharge port on the high-pressure side of the compression chamber; original blade groove is along radially setting up, the axial is switched on, its back end extension is a circular shape fabrication hole (its cross section is not closed), the thickness that leaves between fabrication hole and cylinder body edge is very little, the structural strength who leads to this position is not very high, fracture or deformation very easily, and because the size restriction of the whole volume of compressor, this position can not thicken again, so this technical scheme adds on the inside wall in this fabrication hole and establishes a plurality of sections bellyings, the structure similar to the strengthening rib, with the effective thickness that increases between blade groove and the cylinder external diameter, increase cylinder intensity and rigidity. And when the subsequent blades are matched with the blades, in order to prevent the interference between the subsequent blades, the corresponding positions of the blades are also provided with grooves, so that the blades cannot contact or collide with the convex parts when reciprocating. In addition, because the radial mounting hole is arranged at the inner side wall of the fabrication hole, the mounting hole is used for mounting the reset spring and is equivalent to two mutually vertical through holes, in order to meet the structural requirements, the protruding parts can only be arranged at the upper side and the lower side of the mounting hole, and the number of the protruding parts is set according to the actual size requirement.

Preferably, the number of the convex parts is 2 in total, and the 2 convex parts are symmetrically distributed on the upper side and the lower side of the mounting hole. In this way, in the simplest form, the projections are 2 segments in total, one on each of the upper and lower sides of the mounting hole, at a distance from both mounting holes.

Preferably, the number of the convex parts is 4 in total, and the 4 convex parts are symmetrically distributed on the upper side and the lower side of the mounting hole at intervals. In this way, for further strength improvement, the total number of the protruding parts is 4, 2 protruding parts are respectively arranged on the upper side and the lower side of the mounting hole, a certain distance is reserved between the protruding parts and the mounting hole, and a certain distance is reserved between the adjacent protruding parts.

Preferably, the convex part is in a crescent shape or an unclosed circular ring shape. In this way, since the cross section of the process hole is a non-closed circular shape, the radial cross section of the boss may be a non-closed circular ring shape, and may be a crescent shape or another shape matching the shape of the blade tail section in order to prevent the interference with the blade.

Still provide a rotary compressor, including blade, piston, be used for driving the piston is in do eccentric rotation's bent axle and foretell cylinder in the compression chamber, the blade activity is inserted and is located in the blade groove, be equipped with in the mounting hole with the elastic component of blade butt, the piston is located in the compression chamber and with the blade butt is in order to drive the blade is in reciprocating motion makes a round trip in the blade groove, the bent axle is connected with the piston, the blade is kept away from the one end of piston be equipped with the recess that the bellying matches. Like this, utilize foretell cylinder after the improvement, install in rotary compressor, rotary compressor's other parts are similar with current structure, the bent axle drives the piston and does eccentric rotation in the compression chamber, because piston and blade support, and the tail end of blade has an elastic component to make it reset, so the piston can drive the blade reciprocating motion back and forth in the blade groove, piston and blade divide into high-pressure side and low pressure side with the cylinder volume, along with the eccentric rotation of piston, make low pressure side volume constantly enlarge, high pressure side volume constantly reduces, thereby realize the gas compressor function. Generally, the rotating speed of the whole compressor is relatively large, the height of an air cylinder in the existing compressor is smaller, the reciprocating motion amplitude of corresponding blades is also increased, the thickness between the tail end of a blade groove and the outer diameter of the air cylinder is smaller and smaller in order to accommodate the moving space of the blades, the strength is lower and lower, and the air cylinder with the structure is required to be reinforced in order to prevent the normal operation of the compressor from being influenced by the breakage or deformation of the air cylinder.

Further, the surface of the blade is provided with an iron nitride protective layer. Therefore, the iron nitride protective layer is added on the surface of the whole blade, so that the structural stability, the corrosion resistance and the service life of the blade can be improved.

Preferably, the elastic member is a spring.

More preferably, the spring is a carbon steel or stainless steel spring.

Preferably, the piston is made of sintered steel. In other embodiments, the material can also be made of high-strength materials such as powder metallurgy materials or cast iron.

Also provides a refrigeration cycle device, which comprises the rotary compressor. Therefore, the refrigeration cycle device adopting the rotary compressor greatly improves the stability of the whole operation.

Compared with the prior art, the beneficial effects are:

according to the utility model, the plurality of sections of the protruding parts are additionally arranged on the inner side wall of the fabrication hole at the tail end of the blade groove of the air cylinder, so that the effective thickness between the blade groove and the outer diameter of the air cylinder can be increased, the structural strength and rigidity of the air cylinder are increased, the air cylinder is effectively prevented from being broken or deformed, the normal operation of the rotary compressor is ensured, and the service life of equipment is prolonged.

Drawings

FIG. 1 is a schematic structural view of example 1.

FIG. 2 is a schematic view of the structure of the compression chamber side in example 1.

Fig. 3 is a sectional view taken along line a-a in fig. 2.

FIG. 4 is a schematic view of FIG. 3 with the blade in place.

FIG. 5 is a schematic structural view of example 4.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, it is only for convenience of description and simplicity of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

The technical scheme of the utility model is further described in detail by the following specific embodiments in combination with the attached drawings:

example 1

As shown in fig. 1 and 2, the cylinder for the rotary compressor includes a cylinder body 1, a suction inlet and a discharge outlet disposed on the cylinder body 1, and a compression chamber 2 disposed in the middle of the cylinder body 1, wherein a vane slot 3 is radially disposed between the suction inlet and the discharge outlet, one end of the vane slot 3 away from the compression chamber 2 is a fabrication hole 4, an installation hole 5 perpendicular to the fabrication hole 4 is disposed on an inner side wall of the fabrication hole 4, and referring to fig. 1-3, 1 segment of protruding portions 6 are further disposed on two sides of the installation hole 5 along an axial direction of the inner side wall of the fabrication hole 4. In this embodiment, the number of the protruding portions 6 is 2 in total, and 2 sections of the protruding portions 6 are symmetrically distributed on the upper side and the lower side of the mounting hole 5; the boss 6 is crescent. The opening of the crescent structure is just butted with the straight section of the blade groove 3. The cross section of the fabrication hole 4 is a non-closed circular shape, so the radial cross section of the boss 6 may be a non-closed circular ring shape, and in order to prevent the interference to the blade 7, the boss may be arranged in a crescent shape or other shapes matching with the shape of the tail section of the blade.

The working principle of the embodiment is as follows: the refrigerant fluid enters the low-pressure side of the compression chamber 2 from the suction port, and the fluid compressed in the compression chamber 2 is discharged from the discharge port on the high-pressure side of the compression chamber 2; the original blade groove 3 is arranged along the radial direction, the axial direction is conducted, the tail section of the blade groove is expanded into a circular fabrication hole 4 (the cross section of the fabrication hole is not closed), the thickness left between the fabrication hole 4 and the edge of the cylinder body 1 is very small, the structural strength of the position is not very high, the process hole is easy to break or deform, the position cannot be thickened due to the size limitation of the whole volume of the compressor, and therefore the technical scheme is provided with a plurality of sections of protruding parts 6 on the inner side wall of the fabrication hole 4, the structure is similar to a reinforcing rib, the effective thickness between the blade groove 3 and the outer diameter of the cylinder is increased, and the strength and the rigidity of the cylinder are increased. And in order to prevent the interference between the subsequent vanes 7 and the vanes, grooves 8 are arranged at corresponding positions of the vanes 7, so that the vanes 7 do not contact or collide with the protrusions 6 when reciprocating. In addition, because the radial mounting hole 5 is arranged at the inner side wall of the fabrication hole 4 for mounting the return spring, which is equivalent to two mutually perpendicular through holes, in order to meet the structural requirements, the protruding parts 6 can only be arranged at the upper side and the lower side of the mounting hole 5, and the number of the protruding parts 6 is set according to the actual size requirement. The quantity of the convex parts 6 adopts the simplest mode, the convex parts 6 are 2 sections in total, the upper side and the lower side of the mounting hole 5 are respectively provided with one convex part, and a certain distance is reserved between the convex parts and the mounting hole 5.

This embodiment is through increasing 2 sections bellying 6 on the inside wall of fabrication hole 4, can increase the effective thickness between blade groove 3 and the cylinder external diameter to increase the structural strength and the rigidity of cylinder, prevent effectively that the cylinder from breaking or warping, guarantee rotary compressor's normal operating, the life of extension equipment.

Example 2

The embodiment provides a cylinder for a rotary compressor, similar to embodiment 1, it includes cylinder body 1, locates sunction inlet and discharge port on the cylinder body 1 and locate compression chamber 2 at the middle part of cylinder body 1, the sunction inlet with radially be equipped with blade groove 3 between the discharge port, the one end that blade groove 3 kept away from compression chamber 2 is fabrication hole 4, the inside wall of fabrication hole 4 seted up with fabrication hole 4 vertically mounting hole 5, be equipped with in the mounting hole 5 with the elastic component 9 of blade 7 butt, the inside wall of fabrication hole 4 is in along the axial still be equipped with 2 sections interval distribution's bellying 6 respectively in the both sides of mounting hole 5. That is, in the present embodiment, the number of the protruding portions 6 is 4 in total, and the 4 protruding portions 6 are symmetrically and spaced apart from each other on the upper and lower sides of the mounting hole 5. In order to further improve the strength of the present embodiment, the number of the protruding portions 6 is 4 in total, 2 protruding portions are respectively arranged on the upper side and the lower side of the mounting hole 5, a certain distance is formed between the two protruding portions 5, and a certain distance is also formed between the two adjacent protruding portions 6.

Example 3

The embodiment provides a cylinder for a rotary compressor, similar to embodiment 1, which includes a cylinder body 1, a suction inlet and a discharge outlet on the cylinder body 1, and a compression chamber 2 in the middle of the cylinder body 1, a vane groove 3 is radially arranged between the suction inlet and the discharge outlet, one end of the vane groove 3 far away from the compression chamber 2 is a fabrication hole 4, an installation hole 5 perpendicular to the fabrication hole 4 is formed in the inner side wall of the fabrication hole 4, an elastic member 9 abutted against a vane 7 is arranged in the installation hole 5, and 3 sections of protrusions 6 distributed at intervals are arranged on the upper side and the lower side of the installation hole 5 along the axial direction of the inner side wall of the fabrication hole 4. In this embodiment, the number of the protruding portions 6 is 3 in total, 1 protruding portion is provided on the upper side of the mounting hole, and 2 protruding portions are provided on the lower side of the protruding portion, that is, the number of the protruding portions on the upper side and the lower side is different, which is also feasible. In the present embodiment, in order to fully utilize the space, the protrusions 6 are provided in 3 stages in total, and there is a certain distance from the mounting hole 5, and there is also a certain distance between the adjacent protrusions 6.

Example 4

The embodiment provides a rotary compressor, as shown in fig. 5, including a blade 7, a piston 11, a crankshaft 10 for driving the piston 11 to rotate eccentrically in the compression chamber 2, and a cylinder in embodiment 1 or 2, the blade 7 is movably inserted into the blade groove 3, an elastic member 9 abutted to the blade 7 is provided in the mounting hole 5, the piston 11 is provided in the compression chamber 2 and abutted to the blade 7 to drive the blade 7 to reciprocate in the blade groove 3, the crankshaft 10 is connected to the piston 11, as shown in fig. 4, a groove 8 matched with the protrusion 6 is provided at one end of the blade 7 away from the piston 11. The blade 7 is made of sintered steel or cast iron, and the surface of the blade 7 is provided with an iron nitride protective layer. The piston 11 is made of sintered steel or cast iron; in this embodiment, the elastic member 9 is a stainless steel spring.

In the embodiment, the improved cylinder is adopted and installed in the rotary compressor, other parts of the rotary compressor are similar to the existing structure, the crankshaft 10 drives the piston 11 to eccentrically rotate in the compression chamber 2, the piston 11 and the blade 7 are abutted, and the tail end of the blade 7 is provided with the elastic piece 9 for resetting, so that the piston 11 can drive the blade 7 to reciprocate in the blade groove 3, the piston 11 and the blade 7 divide the volume in the cylinder into a high-pressure side and a low-pressure side, the volume of the low-pressure side is continuously enlarged along with the eccentric rotation of the piston 11, the volume of the high-pressure side is continuously reduced, and the gas compressor function is realized. Generally, the rotating speed of the whole compressor is relatively large, the height of the cylinder in the existing compressor is smaller, the reciprocating motion amplitude of the corresponding blade 7 is also increased, the thickness between the tail end of the blade groove 3 and the outer diameter of the cylinder is smaller and smaller in order to accommodate the moving space of the blade 7, the strength is lower and lower, and the cylinder with the structure is required to be reinforced in order to prevent the cylinder from being broken or deformed to influence the normal operation of the compressor.

Example 5

The present embodiment provides a refrigeration cycle apparatus including the rotary compressor of embodiment 3. In this embodiment, the refrigeration cycle apparatus using the rotary compressor in embodiment 3 is adopted, and the stability of the entire operation is also greatly improved.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The cylinder for the rotary compressor comprises a cylinder body (1), a suction inlet and a discharge outlet which are arranged on the cylinder body (1), and a compression chamber (2) which is arranged in the middle of the cylinder body (1), wherein a blade groove (3) is arranged between the suction inlet and the discharge outlet along the radial direction, one end, far away from the compression chamber (2), of the blade groove (3) is a fabrication hole (4), an installation hole (5) which is vertical to the fabrication hole (4) is arranged on the inner side wall of the fabrication hole (4) along the radial direction, and the cylinder is characterized in that a plurality of protruding parts (6) which are distributed at intervals are respectively arranged on the two sides of the installation hole (5) along the axial direction of the inner side wall of the fabrication hole (4).

2. The cylinder for a rotary compressor according to claim 1, wherein the number of the protrusions (6) is 2 in total, and the 2 protrusions (6) are symmetrically distributed on upper and lower sides of the mounting hole (5).

3. The cylinder for a rotary compressor according to claim 1, wherein the number of the protrusions (6) is 4 segments in total, and the 4 segments of the protrusions (6) are symmetrically and spaced apart on upper and lower sides of the mounting hole (5).

4. Cylinder for a rotary compressor according to claim 1, characterized in that the boss (6) is crescent-shaped or not closed circular ring-shaped.

5. A rotary compressor is characterized by comprising a blade (7), a piston (11), a crankshaft (10) and a cylinder, wherein the crankshaft (10) is used for driving the piston (11) to eccentrically rotate in a compression chamber (2), the cylinder is as claimed in any one of claims 1 to 4, the blade (7) is movably inserted into the blade groove (3), an elastic part (9) abutted against the blade (7) is arranged in a mounting hole (5), the piston (11) is arranged in the compression chamber (2) and abutted against the blade (7) so as to drive the blade (7) to reciprocate in the blade groove (3), the crankshaft (10) is connected with the piston (11), and a groove (8) matched with the protruding part (6) is formed in one end, far away from the piston (11), of the blade (7).

6. The rotary compressor of claim 5, wherein the surface of the vane (7) has an iron nitride protective layer.

7. The rotary compressor of claim 5, wherein the piston (11) is made of sintered steel.

8. The rotary compressor of claim 5, wherein the elastic member (9) is a spring.

9. The rotary compressor of claim 8, wherein the spring is a carbon steel or stainless steel spring.

10. A refrigeration cycle apparatus comprising the rotary compressor of any one of claims 5 to 9.

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