CN220248355U - A kind of compressor - Google Patents

Abstract

The utility model relates to a compressor, which comprises a shell and a motor assembly; the shell is of a cylindrical structure with two through ends, and a plurality of protruding structures are formed by protruding the side wall of the shell outwards along the radial direction; the motor assembly is arranged in the shell and comprises a motor stator, the outer peripheral surface of the motor stator is provided with a plurality of fixing parts used for being connected with the inner wall of the shell and a plurality of through hole parts used for being enclosed with the inner wall of the shell to form a refrigerant circulation channel, the fixing parts are arranged at intervals along the circumferential direction, the protruding structures correspond to the positions of the through hole parts, the increase of the cross section area of the refrigerant circulation channel formed by enclosing the motor stator and the shell is facilitated, lubricating oil can fall back into the compressor pump body under the action of gravity to lubricate, refrigerating machine oil is prevented from moving between the upper cover and the motor assembly along with refrigerant gas or even being taken out of the compressor, and further the lubricating effect is influenced, the compression energy efficiency is influenced and the like.

Description

A kind of compressor

Technical Field

The utility model relates to the technical field of compressors, in particular to a compressor.

Background

The rotary compressor is generally composed of an upper cover, a lower cover, a shell, a motor fixed in the upper cover and used for providing rotary power and a pump body used for realizing refrigerant compression, wherein an independent refrigerant compression working space is formed by enclosing an upper bearing, a cylinder and a lower bearing in the pump body, and a sliding block is arranged in the cylinder in a sliding manner and divides the refrigerant compression working space into two spaces of an air suction cavity and an air discharge cavity; when the motor is electrified, the stator coil generates an electromagnetic field, the rotor cuts magnetic force lines to generate power to drive the crankshaft of the pump body to rotate so as to enable the rotor piston to rotate in the cylinder to compress the refrigerant, the volume of the suction and exhaust cavity is continuously changed, the low-temperature low-pressure gaseous refrigerant is sucked, and the low-temperature low-pressure gaseous refrigerant is compressed into the high-temperature high-pressure gaseous refrigerant and then is discharged out of the pump body, and the circulation is performed.

After the compressor operates, the refrigerant gas compressed by the pump body is discharged through the vent holes arranged on the bearing, and because the discharged refrigerant gas has high flow velocity and large flow rate, particularly in a large-sized compressor, a large amount of refrigerating machine oil filled in the interior of the compressor shell for lubrication can be brought to the upper part of the compressor, namely between the stator and the upper cover through a circulation channel arranged in the motor stator and formed between the motor stator and the shell, so that the oil supply of the pump body is reduced, the lubrication effect between all motion contact surfaces is influenced, the reliability abrasion of the compressor is deteriorated, and a large amount of refrigerating machine oil is brought out of the compressor, and the refrigerant gas has high oil content and low compression efficiency.

Disclosure of Invention

Accordingly, an object of the present utility model is to provide a compressor having advantages of simple structure and molding process and effectively reducing the discharge amount of compressor oil.

A compressor comprising a housing and a motor assembly; the shell is of a cylindrical structure with two through ends, and a plurality of protruding structures are formed by protruding the side wall of the shell outwards along the radial direction; the motor assembly is arranged in the shell and comprises a motor stator, the outer peripheral surface of the motor stator is provided with a plurality of fixing parts used for being connected with the inner wall of the shell and a plurality of through hole parts used for enclosing with the inner wall of the shell to form a refrigerant circulation channel, the fixing parts and the through hole parts are arranged at intervals along the circumferential direction, and the protruding structures correspond to the positions of the through hole parts.

According to the embodiment of the utility model, the shape and structure of the compressor shell are changed, the part of the compressor shell is outwards protruded to form a protruded structure, and the protruded structure corresponds to the position of the through hole part arranged on the outer peripheral surface of the motor stator, so that the cross section area of a refrigerant flow channel formed by the motor stator and the shell in a surrounding way is increased.

Further, the width of the protruding structure is A, and the value range of A is 5-90 mm.

Further, the height of the protrusions of the protruding structures is C, and the value range of C is 2-10 mm.

Further, the axial height of the shell is H, and the axial height of the protruding structure is H, wherein H is more than or equal to 10mm and less than or equal to 0.5 Hmm.

Further, the minimum distance from the edge of the protruding structure to the edge of the compressor housing is D, and D is more than or equal to 5mm and less than or equal to 0.4 x H mm.

Further, the maximum angle formed by the connecting lines of the points on the two side edges of the protruding structure and the central shaft of the compressor is E, and the value range of E is 5-60 degrees.

Further, the number of the through hole portions is at least 4, the number of the projection structures is at least 2, and the projection structures are all arranged at intervals along the circumferential direction, so that the cross-sectional area of the refrigerant circulation channel is further increased, and the lubricating oil can fall back.

For a better understanding and implementation, the present utility model is described in detail below with reference to the drawings.

Drawings

FIG. 1 is a schematic view of a housing according to embodiment 1 of the present utility model;

FIG. 2 is a schematic side view of a housing structure according to embodiment 1 of the present utility model;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic top view of the housing and motor assembly according to embodiment 1 of the present utility model;

fig. 5 is a schematic cross-sectional view of the housing and the motor assembly according to embodiment 1 of the present utility model.

Detailed Description

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Example 1

Embodiment 1 of the present utility model provides a compressor including a housing 1 and a motor assembly; referring to fig. 1-5, fig. 1 is a schematic diagram of a housing structure according to embodiment 1 of the present utility model, fig. 2 is a schematic diagram of a side view of the housing structure according to embodiment 1 of the present utility model, fig. 3 is a cross-sectional view of A-A shown in fig. 2, fig. 4 is a schematic diagram of a housing and a motor assembly structure according to embodiment 1 of the present utility model in a top view, fig. 5 is a schematic diagram of a cross-sectional view of the housing and the motor assembly structure according to embodiment 1 of the present utility model, as shown in the drawings, the housing 1 is a tubular structure with two ends penetrating, and a plurality of protruding structures 11 are formed by protruding the side walls of the housing along the radial direction outwards; the motor component is arranged in the shell 1 and correspondingly arranged above the compressor pump body component; the motor assembly comprises a motor stator 2, the outer peripheral surface of the motor stator 2 is provided with a plurality of fixing parts 21 used for being connected with the inner wall of the shell 1 and a plurality of through hole parts 22 used for forming a refrigerant circulation channel 3 by surrounding with the inner wall of the shell 1, the fixing parts 21 and the through hole parts 22 are arranged at intervals along the circumferential direction, and the positions of the protruding structures 11 and the through hole parts 22 correspond.

According to the embodiment of the utility model, the shape and the structure of the compressor shell 1 are changed, the part of the compressor shell is outwards protruded to form the protruded structure 11 along the radial direction, and the protruded structure corresponds to the position of the through hole part 22 arranged on the outer peripheral surface of the motor stator 2, so that the cross section area of the refrigerant circulation channel 3 formed by the motor stator 2 and the shell 1 in a surrounding manner is increased;

from the froude value formula (representing the ratio of inertial force to gravity):

in the relation: v is the average flow rate; h is the representative length; g is gravity acceleration;

when Fr is greater than 1, the inertial force is greater than gravity, so that the oil drops will not fall down and will be blown all between the upper cover and the motor.

As can be seen from the above formula, the slower the internal fluid velocity, i.e. the smaller the velocity v, of the refrigerant flow channel 3 formed by the enclosing of the motor stator 2 and the casing 1, when Fr is smaller than 1, the lubricating oil can fall back to the pump body by gravity to lubricate the contact surface of each moving part, so as to avoid the problems that the oil level of the refrigerating machine oil in the compressor is lowered to affect the lubrication effect and the compression energy efficiency, etc. on the premise of ensuring the motor efficiency and the compressor noise, compared with the design in the prior art that the cut area of the through hole part 22 on the outer peripheral surface of the motor stator 2 is increased, or the through hole is added on the motor stator 2 or the motor rotor, etc. is beneficial to the engine oil fallback, the scheme of the utility model effectively avoids the problem that the vibration noise of the compressor is deteriorated due to the reduction of the motor component, and the scheme of the utility model can effectively reduce the oil output on the premise of ensuring the motor efficiency and the compressor noise, and the bulge structure 11 can be directly obtained on the existing casing 1 through the stamping forming process, and compared with the prior art that the axial design of the casing 1 is increased, so that the refrigerating machine oil fallback cost is beneficial to the reduction of the utility model.

Specifically, the fixing portion 21 of the motor stator 2 may be limited in the housing 1 by a thermal sleeve or the like, and the through hole portion 22 of the motor stator 2 may be formed by cutting or the like or directly formed by machining; the width of the convex structure 11 is A, and the value range of A is 5-90 mm, wherein the width is defined as being along the direction vertical to the radial direction of the compressor; the height of the bulge structure 11 is C, the value range of C is 2-10 mm, and the height of the bulge is determined relative to the outer peripheral surface of the shell 1; the axial height of the shell 1 is H, the axial height of the convex structure 11 is H, and H is more than or equal to 10mm and less than or equal to 0.5 mm; the minimum distance from the edge of the convex structure 11 to the edge of the compressor shell 1 is D, and D is more than or equal to 5mm and less than or equal to 0.4 x H mm; the maximum angle formed by the connection line between the points on the two side edges of the bulge structure 11 and the central axis of the compressor is E, and the value range of E is 5-60 degrees.

Further preferably, the number of the through hole portions 22 is at least 4, and the number of the projection structures 11 is at least 2, which are all arranged at intervals in the circumferential direction, further increasing the cross-sectional area of the refrigerant flow passage 3 so as to facilitate the falling back of the lubricating oil.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims (7)

1. A compressor, characterized in that: comprises a shell and a motor assembly; the shell is of a cylindrical structure with two through ends, and a plurality of protruding structures are formed by protruding the side wall of the shell outwards along the radial direction; the motor assembly is arranged in the shell and comprises a motor stator, the outer peripheral surface of the motor stator is provided with a plurality of fixing parts used for being connected with the inner wall of the shell and a plurality of through hole parts used for enclosing with the inner wall of the shell to form a refrigerant circulation channel, the fixing parts and the through hole parts are arranged at intervals along the circumferential direction, and the protruding structures correspond to the positions of the through hole parts.

2. The compressor as set forth in claim 1, wherein: the width of the convex structure is A, and the value range of A is 5-90 mm.

3. The compressor as set forth in claim 1, wherein: the height of the protrusions of the protruding structures is C, and the value range of C is 2-10 mm.

4. The compressor as set forth in claim 1, wherein: the axial height of the shell is H, and the axial height of the protruding structure is H, wherein H is more than or equal to 10mm and less than or equal to 0.5 mm.

5. The compressor as set forth in claim 4, wherein: the minimum distance from the edge of the protruding structure to the edge of the shell is D, and D is more than or equal to 5mm and less than or equal to 0.4 x H mm.

6. The compressor as set forth in claim 1, wherein: the maximum angle formed by the connecting lines of the points on the two side edges of the convex structure and the central shaft of the compressor is E, and the value range of E is 5-60 degrees.

7. The compressor as set forth in claim 1, wherein: the number of the through hole parts is at least 4, and the number of the protruding structures is at least 2, and the protruding structures are all arranged at intervals along the circumferential direction.