CN218581813U - Compressor - Google Patents

Abstract

The utility model discloses a compressor, wherein, compressor includes casing, oil bath, motor and oil baffle. The oil pool is arranged at the bottom of the shell; the motor is arranged in the shell and is positioned above the oil pool, and an oil return channel extending along the vertical direction is formed between the stator of the motor and the inner surface of the shell; the oil baffle is arranged between the stator of the motor and the oil pool, and an oil return groove is formed between at least part of the edge of the oil baffle and the inner wall of the shell. The utility model discloses technical scheme prevents that the refrigerator oil in oil sump is by stator cavity of resorption air current disturbance and when taking out the compressor, can also improve the oil return area to make the oil return of compressor more smooth and easy.

Description

Compressor

Technical Field

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

Background

In order to avoid that the refrigerating machine oil in the oil sump is disturbed by the air flow in the lower cavity of the stator and is brought out of the compressor in the existing compressor, an oil baffle plate is generally arranged at the position.

The conventional design of the existing compressor is that oil return is carried out through a gap between the outer edge of the oil baffle plate and the inner wall of the shell, the oil return area is limited, the problem of unsmooth oil return inside the whole compressor can be caused, the total exhaust oil circulation rate of the compressor is high, the efficiency of an air conditioning system is low on one hand, and the reliability of the compressor monomer and the air conditioning system is challenged on the other hand.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a compressor, when the refrigerator oil that aims at preventing the oil bath is taken out the compressor by stator cavity of resorption air current disturbance, can also improve the oil return area to make the oil return of compressor more smooth and easy.

In order to achieve the above object, the present invention provides a compressor, which comprises a housing, an oil sump, a motor and an oil baffle. The oil pool is arranged at the bottom of the shell; the motor is arranged in the shell and is positioned above the oil pool, and an oil return channel extending along the vertical direction is formed between the stator of the motor and the inner surface of the shell; the oil baffle is arranged between the stator of the motor and the oil pool, and an oil return groove is formed between at least part of the edge of the oil baffle and the inner wall of the shell.

Optionally, the oil return groove is a notch arranged at the edge of the oil baffle plate.

Optionally, the oil return groove corresponds to the oil return channel in the up-down direction.

Optionally, the oil return grooves are provided in plurality and are symmetrically distributed on the edge of the oil baffle.

Optionally, the oil return grooves include a first oil return groove with an arc-shaped edge and a second oil return groove with a straight edge.

Optionally, the oil baffle includes an upper plate surface facing away from one side of the oil sump, and a distance between the upper plate surface and the oil sump decreases gradually from the center to the periphery.

Optionally, the oil baffle plate is further provided with an installation groove different from the oil return groove along the edge thereof.

Optionally, the compressor further comprises a frame connecting the inner wall of the housing and the oil deflector.

Optionally, the surface of the oil baffle plate is provided with a mounting hole for fixing.

Optionally, the compressor further comprises:

a crankshaft provided in the housing and installed in an axial direction of the housing;

the vortex disc assembly is arranged at the top of the shell, and the shell is provided with an air suction port communicated with the vortex disc assembly;

a balance located below the scroll assembly;

the vortex disc assembly, the balance piece and the motor are sequentially arranged on the crankshaft, a cavity is formed between the vortex disc assembly and the motor at intervals, an exhaust port is formed in the side wall of the shell, and the exhaust port is communicated with the cavity and the outside of the shell.

The utility model discloses technical scheme is in the stator of motor with be provided with the fender oil board between the oil bath, prevent the cavity gas disturbance under the stator and take machine oil from the compressor inside. Be formed with the oil gallery through between the inner wall at the at least partial edge of oil baffle and casing to make the machine oil that is located oil baffle edge can directly fall back to the oil bath, thereby avoided too much machine oil to remain the last face at oil baffle, and then make the machine oil that is located the face can flow back to the oil bath faster effectively, avoided gas disturbance and the oil gas secondary that causes mixes, prevented machine oil effectively and taken away from the compressor along with the gas. Compare in the scheme that only comes the oil return through the gap between fender oil board and the casing among the prior art, the utility model discloses a through adding the oil return tank, thereby it is more smooth and easy that the area through the increase oil return makes the process of oil return, has reduced the possibility that the last face of fender oil board was saved machine oil.

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 structural diagram of an embodiment of a compressor according to the present invention;

fig. 2 is a schematic structural diagram of an embodiment of a stator of the compressor of the present invention;

fig. 3 is a schematic structural view of an embodiment of an oil baffle plate of the compressor of the present invention;

fig. 4 is a schematic view of an oil baffle assembly structure of the compressor of the present invention;

fig. 5 is a schematic structural diagram of an oil baffle in the prior art.

The reference numbers illustrate:

reference numerals	Name(s)	Reference numerals	Name(s)
				1	Shell body	11	Air suction inlet
12	Exhaust port	2	Oil pool
				3	Electric machine	31	Stator
32	Mover	33	Edge cutting
				4	Oil baffle plate	41	First oil return groove
42	Second oil return groove	43	Upper plate surface
				44	Mounting groove	45	Mounting hole
5	Rack	6	Crankshaft
				61	Oil suction passage	71	Dynamic vortex disk
72	Static vortex disk	8	Balancing piece
				9	Oil return passage

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 all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiments of the present invention 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 indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

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 such 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.

The compressor is generally classified into a piston compressor, a screw compressor, a centrifugal compressor, a linear compressor, and the like. The piston compressor generally consists of a shell 1, a motor, a cylinder, a piston, control equipment (a starter and a thermal protector) and a cooling system. The cooling modes include oil cooling, air cooling and natural cooling. The linear compressor has no shaft, no cylinder, and no sealing and heat dissipating structure. There are 5 major types of compressors employed in the refrigeration and air conditioning industry: reciprocating, screw, rotary, scroll, and centrifugal, with reciprocating being the most used compressor in small and medium size commercial refrigeration systems. Screw compressors are used primarily in large commercial and industrial systems. Rotary compressors and scroll compressors are mainly used in household and small capacity commercial air conditioning devices, and centrifugal compressors are widely used in air conditioning systems for large buildings. Both domestic refrigerator and air conditioner compressors today are of the positive displacement type, which in turn can be divided into reciprocating and rotary types. The reciprocating compressor uses a piston, a crank and a connecting rod mechanism or a piston, a crank and a sliding pipe mechanism, and the rotary compressor mainly uses a rolling rotor compressor. In commercial air conditioners, the air conditioner is mostly centrifugal type, vortex type or screw type. The suction pipe of the compressor is connected with the evaporator of the refrigerating system, and the discharge pipe of the compressor is also connected with the condenser of the refrigerating system. When the rotary compressor works, a low-temperature low-pressure refrigerant mixture (a mixture of gaseous refrigerant, liquid refrigerant and oil) in the refrigerating system can enter the liquid storage cavity from the suction pipe, the gaseous refrigerant can be separated from the liquid refrigerant and the oil after the refrigerant mixture enters the liquid storage cavity, the separated gaseous refrigerant is sucked into the return pipe, then enters the compression cavity of the cylinder through the return pipe and is compressed into the high-temperature high-pressure refrigerant in the compression cavity, and then the compressed refrigerant is discharged into the compressor cavity from the compression cavity of the cylinder and is discharged from the compressor cavity through the exhaust pipe. The liquid refrigerant is stored in the liquid storage cavity, and the separated oil is collected at the bottom of the liquid storage cavity under the action of gravity.

In this embodiment, a scroll compressor is used, the scroll compressor is a positive displacement compressor, and the compression unit is composed of a movable scroll and a fixed scroll. Including a number of structural features that provide a bypass flow of gas through the compressor housing to reduce entrained oil.

After entering the housing, some of the gas flows upward to reduce the amount of gas flowing downward toward the oil. To accomplish this, the motor of the compressor may be surrounded by a sleeve having upper and lower apertures for directing the air flow to the upper and lower stator end turn coils of the motor. In some embodiments, the suction inlet is positioned in important relation to the two gas passages between the stator and the motor housing. The inlet is positioned such that a channel receives the incoming gas and divides the flow into two opposite directions, i.e., upward and downward. The other channels only carry gas upwards. In addition, oil dams, diffusers, streamlined counterweight blocks, and suction line traps can also aid in oil-gas separation or minimize entrained oil.

The utility model provides a compressor.

Referring to fig. 1 to 4, in an embodiment of the present invention, the compressor includes a housing 1, an oil sump 2, a motor 3, and an oil baffle 4. The oil pool 2 is arranged at the bottom of the shell 1; the motor 3 is arranged in the shell 1 and is positioned above the oil pool 2, and an oil return channel 9 extending along the vertical direction is formed between the stator 31 of the motor 3 and the inner surface of the shell 1; the oil baffle plate 4 is arranged between the stator 31 of the motor 3 and the oil pool 2, and an oil return groove is formed between at least part of the edge of the oil baffle plate 4 and the inner wall of the shell 1.

The utility model discloses technical scheme is in the stator 31 of motor 3 with be provided with oil baffle 4 between the oil bath 2, prevent the chamber gas disturbance under the stator 31 and take machine oil from the compressor inside. Be formed with the oil gallery through at least partial edge at oil baffle 4 and the inner wall of casing 1 between, so that the machine oil that is located oil baffle 4 edge can directly fall back to in oil bath 2, thereby avoided too much machine oil to remain at oil baffle 4's last face 43, and then make the machine oil that is located last face 43 flow back to in oil bath 2 more fast effectively, the oil gas secondary that has avoided gas disturbance and has caused mixes, prevented effectively that machine oil is taken away from the compressor along with the gas. Compare in the scheme that only comes the oil return through the gap between fender oil board 4 and the casing 1 among the prior art, the utility model discloses a through adding the oil gallery, thereby it is more smooth and easy to make the process of oil return through the area that increases the oil return, has reduced the possibility that the last face 43 of fender oil board 4 stockpiled machine oil.

Further, in an embodiment, the oil return groove is opened at a position of the oil baffle 4 near the edge, so that an oil return area of the oil baffle 4 is increased. In this embodiment, the oil return groove is a notch formed in the edge of the oil baffle plate 4, and the notch is communicated with the gap between the oil baffle plate 4 and the housing 1, so that engine oil can return through the gap between the oil baffle plate 4 and the housing 1, and the oil return speed of the engine oil is further improved, and excessive engine oil is prevented from being accumulated on the oil baffle plate 4, so that the engine oil is conveyed to the outside of the housing 1 of the compressor along with the air flow, and finally is difficult to return to the oil sump 2.

Further, the oil return groove corresponds to the oil return passage 9 in the up-down direction. It should be noted that, in an embodiment, the size and the shape of the oil return groove are substantially the same as and correspond to those of the oil return channel 9, that is, the projection of the oil return channel 9 on the oil baffle 4 along the vertical direction can coincide with the oil return hole, so that the engine oil flowing through the oil return channel 9 can smoothly pass through the oil return groove formed in the edge of the oil baffle 4, and finally converge in the oil sump 2 at the bottom of the housing 1. However, the design is not limited thereto, in other embodiments, the size and the shape of the oil return groove may be larger than the size and the shape of the oil return channel 9, that is, the projection of the oil return channel 9 in the vertical direction may coincide with at least part of the oil return hole, so that the engine oil flowing through the oil return channel 9 may smoothly pass through the oil return groove formed in the edge of the oil baffle 4, and finally converge in the oil sump 2 at the bottom of the housing 1.

Furthermore, the oil return grooves are provided with a plurality of oil return grooves which are symmetrically distributed on the edge of the oil baffle plate 4. In this embodiment, six oil return grooves are provided, and are disposed at the edge of the oil baffle 4 at intervals. Preferably, the oil return grooves are symmetrically distributed. However, the design is not limited thereto, and the specific number of the oil return grooves is not limited according to the requirement of the oil return rate, and in another embodiment, the number of the oil return grooves may also be; two, four, also seven or eight, etc.

Further, the oil return grooves include a first oil return groove 41 with an arc-shaped edge and a second oil return groove 42 with a straight edge cut 33. It should be noted that the shapes of the first oil return groove 41 and the second oil return groove 42 herein are changed according to the structure of the stator 31, and the stator 31 is formed with the cut edges 33 with different structures, and the oil return grooves are formed with different shapes corresponding to the different cut edges 33, so that the engine oil can directly flow into the oil return grooves after passing through the oil return passage 9 between the stator 31 and the housing 1, and the possibility of the engine oil being accumulated on the oil baffle plate 4 is reduced.

Further, the oil baffle 4 includes an upper plate surface 43 facing away from the oil pool 2, and the distance between the upper plate surface 43 and the oil pool 2 gradually decreases from the center to the periphery. Specifically, the distance between the upper plate surface 43 of the oil baffle 4 and the oil sump 2 is limited, but the overall structure of the oil baffle 4 is not limited. That is, the structure of the oil baffle 4 may be a plate as a whole, may be a reversed bowl, or may be an arch or cone.

It should be noted that, in an embodiment, the distance between the upper plate surface 43 and the oil pool 2 refers to the distance between the upper plate surface 43 and the bottommost position of the oil pool 2. It can be understood that the distance between the upper plate surface 43 and the oil pool 2 gradually decreases from the center to the periphery to form a slope, so that the oil on the upper plate surface 43 can flow toward the edge of the upper plate surface 43 toward the slope of the slope, and then flow through the gap and the oil return groove on the edge of the upper plate surface 43, and finally converge in the oil pool 2 at the bottom of the oil baffle 4.

However, the design is not limited thereto, and the slope may only occupy a portion of the upper plate surface 43, that is, only a position of the upper plate surface 43 corresponding to the oil return groove needs to be provided with a slope. In another embodiment, the slope may occupy the whole upper plate surface 43, so that the oil on the upper plate surface 43 has a tendency to flow toward the edge of the upper plate surface 43, thereby allowing the oil to flow toward the edge of the oil baffle 4 more quickly.

Further, the oil baffle 4 is further provided with an installation groove 44 along the edge thereof, which is different from the oil return groove. It should be noted that, although the mounting groove 44 and the oil return groove are both provided at the edge of the oil baffle 4, their functions are different. Specifically, in the present embodiment, the main function of the oil returning groove is to increase the area of the oil returning, so that the path of the oil returning is more direct, the oil returning is smoother, and the possibility of oil accumulation on the upper plate surface 43 of the oil baffle 4 is reduced. The mounting groove 44 is mainly used for avoiding the mounting structure, so that the oil baffle plate 4 can be smoothly mounted inside the shell 1 of the compressor.

It should be noted that the oil deflector 4 of the conventional design is only provided with the mounting groove 44 to facilitate the mounting and fixing of the oil deflector 4, specifically, the outer edge of the frame 5 is provided with three mounting claws for mounting, and the three mounting claws need to be avoided for mounting and fixing the oil deflector 4, that is, the mounting groove 44 in this embodiment also has an avoiding function. And the oil deflector 4 of the conventional design effects the backflow of the oil through the gap between the oil deflector 4 itself and the casing 1, that is, the speed of the oil backflow is determined by the size of the gap between the oil deflector 4 itself and the casing 1. The present embodiment is different from the above embodiment, and the oil return rate of the oil is increased by the oil return groove provided at the edge of the oil baffle 4.

Further, the compressor also comprises a frame 5, and the frame 5 is connected with the inner wall of the shell 1 and the oil baffle 4. Note that, in the present embodiment, the frame 5 functions to fix the oil deflector 4. The connection here includes direct connection or indirect connection, and indirect connection means that other fixing members may be disposed between the oil baffle plates 4. The direct connection can be a bolt connection, and can also be a welding or other fixed connection mode.

Further, the plate surface of the oil baffle plate 4 is provided with a mounting hole 45 for fixing. Specifically, in an embodiment, the mounting holes 45 are provided in a group and uniformly arranged along the circumferential direction of the central hole of the oil baffle 4, and in this embodiment, the mounting holes 45 are used for fixing the relative positions of the oil baffle 4 and the frame 5. However, the design is not limited thereto, and in other embodiments, the oil baffle 4 is provided with two sets of mounting holes 45, wherein one set of mounting holes 45 is used for fixing the relative position of the oil baffle 4 and the frame 5, and the other set of mounting holes 45 is used for avoiding the bolts arranged on the frame 5. However, the design is not limited thereto, and in other embodiments, the two sets of mounting holes 45 may be used for fixing the relative positions of the oil baffle 4 and the frame 5, and used as a repeated limitation, so that the oil baffle 4 is more stably mounted.

In an embodiment, the oil baffle 4 is fixed by the mounting hole 45. Specifically, the oil baffle 4 and the frame 5 are fixed relatively by screws passing through the mounting holes 45 and screwed with the frame 5. In addition, in the present embodiment, the frame 5 is welded to the housing 1. However, the design is not limited thereto, and in other embodiments, the oil baffle 4 and the frame 5 may be fixed in relative positions by welding.

Specifically, in this embodiment, the compressor further includes:

a crankshaft 6 provided in the housing 1 and mounted in an axial direction of the housing 1;

a scroll assembly provided at the top of the casing 1, the casing 1 being provided with an air suction port 11 communicating with the scroll assembly;

a balance 8 located below the scroll assembly;

the motor 3 comprises a stator 31 and a rotor 32, the scroll assembly, the balance member 8 and the motor 3 are sequentially arranged on the crankshaft 6, a cavity is formed between the scroll assembly and the motor 3 at intervals, an exhaust port 12 is formed in the side wall of the shell 1, and the exhaust port 12 is communicated with the cavity and the outside of the shell 1.

Specifically, the scroll assembly comprises an orbiting scroll 71 and a fixed scroll 72, the fixed scroll 72 is fixed on the housing 1, the orbiting scroll 71 is arranged on the crankshaft 6, and a mixture of refrigerant and oil entering from the suction pipe enters a cavity of the housing 1 after passing through the cavities where the fixed scroll 72 and the fixed scroll 71 are located. In the chamber, the cyclone separation of the balance member 8 and the matching of the shell 1 realize the oil-gas separation, the gas flows out from the exhaust port 12 of the chamber, and the engine oil flows downwards along the inner side wall of the shell 1 and finally flows into the oil pool 2. The engine oil flows through the oil return channel 9 between the stator 31 and the casing 1 along the casing 1, then flows through the oil return groove of the oil baffle 4, and finally flows to the oil pool 2 at the bottom of the casing 1.

Further, the movable scroll 71 is sleeved on the crankshaft 6, the movable scroll 71 enables the air suction port 11 at the top of the housing 1 to continuously suck air in the process of continuous rotation, the crankshaft 6 is provided with an oil suction passage 61 penetrating through the crankshaft 6 in the axial direction, the lower end of the oil suction passage 61 is connected with an oil pool 2, the upper end of the oil suction passage 61 extends to the top of the housing 1, and the oil suction passage 61 and the oil return passage 9 form an oil path. Through this oil circuit, machine oil can move to the compressor on the inside part to guarantee the safe operation of compressor, especially reduce the friction consumption of compressor.

Although the subject of the present invention is referred to as the oil deflector 4, it is understood that the oil deflector 4 has a plate-like shape, but the entire oil deflector 4 may have a cover body, a disk-like structure, or the like.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims (10)

1. A compressor, comprising:

a housing;

the oil pool is arranged at the bottom of the shell;

the motor is arranged in the shell and is positioned above the oil pool, and an oil return channel extending along the vertical direction is formed between the stator of the motor and the inner surface of the shell; and

and the oil baffle is arranged between the stator of the motor and the oil pool, and an oil return groove is formed between at least part of the edge of the oil baffle and the inner wall of the shell.

2. The compressor according to claim 1, wherein the oil returning groove is a notch provided at an edge of the oil baffle.

3. The compressor according to claim 2, wherein the oil return groove corresponds to the oil return passage in an up-down direction.

4. The compressor according to claim 1, wherein the oil return grooves are provided in plurality and are symmetrically distributed along the edge of the oil baffle.

5. The compressor of claim 1, wherein the oil return grooves include a first oil return groove having an arc-shaped edge and a second oil return groove having a straight cut edge.

6. The compressor of claim 1, wherein the oil deflector includes an upper plate surface on a side facing away from the oil sump, and a distance from the upper plate surface to the oil sump decreases from a center to a periphery.

7. The compressor of claim 1, wherein the oil baffle plate is further provided along an edge thereof with an installation groove different from the oil return groove.

8. The compressor of claim 1, further comprising a frame connecting the inner wall of the shell and the oil deflector.

9. The compressor of claim 8, wherein the oil deflector has a mounting hole formed in a plate surface thereof for fixing.

10. The compressor of claim 1, further comprising:

a crankshaft provided in the housing and installed in an axial direction of the housing;

the scroll disc assembly is arranged at the top of the shell, and the shell is provided with an air suction port communicated with the scroll disc assembly;

a balance located below the scroll assembly;

the vortex disc assembly, the balance piece and the motor are sequentially arranged on the crankshaft, a cavity is formed between the vortex disc assembly and the motor at intervals, an exhaust port is formed in the side wall of the shell, and the exhaust port is communicated with the cavity and the outside of the shell.

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