CN216950848U - Scroll compressor and air conditioner using same - Google Patents

Abstract

The utility model discloses a scroll compressor and an air conditioner applying the same, wherein the scroll compressor comprises a static scroll disk, an oil suction structure, a crankshaft and an upper bracket with an oil storage cavity, wherein the oil outlet end of the crankshaft is communicated with the oil storage cavity, and the oil storage cavity is also communicated with an oil groove arranged on the lower surface of the static scroll disk through the oil suction structure; lubricating oil is introduced into the oil storage cavity through the crankshaft, and under the action of a first pressure difference, part of the lubricating oil flows into an inlet end of the oil groove through the oil absorption structure; under the action of the second pressure difference, part of lubricating oil flows from the inlet end of the oil groove to the tail part of the oil groove, and then lubrication is provided for the end face of the fixed scroll. The utility model skillfully applies different pressures corresponding to different areas in the working process of the scroll compressor, firstly guides the lubricating oil to the inlet end of the oil groove, and then guides the lubricating oil to the tail part of the oil groove from the inlet end of the oil groove, so that the lubricating oil covers more end surfaces of the fixed scroll disk, and the friction of the end surfaces is reduced.

Description

Scroll compressor and air conditioner using same

Technical Field

The utility model relates to the technical field of compressors, in particular to a scroll compressor and an air conditioner using the same.

Background

Scroll compressors are widely used in the air conditioner art due to their high efficiency, small size, light weight, and smooth operation. Generally, a scroll compressor includes a hermetic casing, a fixed scroll, a movable scroll, a bracket, a main shaft, an oil supply device for an anti-rotation mechanism, and a motor, wherein molded lines of the movable scroll and the fixed scroll are spiral, and the movable scroll is installed eccentrically to the fixed scroll by 180 ° with respect to the fixed scroll, so that a plurality of crescent spaces are formed between the movable scroll and the fixed scroll. When the movable scroll plate does non-autorotation rotary translation with the center of the fixed scroll plate as a rotation center and a certain rotation radius, the outer ring crescent space continuously moves towards the center, at the moment, the refrigerant is gradually pushed to the center space, the volume of the refrigerant is continuously reduced, the pressure is continuously increased until the refrigerant is communicated with the central exhaust hole, and the high-pressure refrigerant is discharged out of the pump body, so that the compression process is completed.

The movable scroll plate and the fixed scroll plate of the scroll compressor are assembled in a fitting manner and can rub against each other during operation, the main friction of the movable scroll plate and the fixed scroll plate is derived from the friction of the end surfaces of the movable scroll plate and the fixed scroll plate, and the friction is reduced by generally lubricating the end surfaces, so that lubricating oil needs to be guided to the end surfaces; the traditional technology is complex in structure and difficult to realize; or lack the power supply of drainage, only can rely on the mode of soaking, drive through the pump body and make lubricating oil distribute in some specific position of terminal surface, this kind of mode can not guarantee the evenly distributed of lubricating oil at the terminal surface, consequently can't solve the friction problem completely.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a scroll compressor and an air conditioner using the same, which provide a power source for lubricating oil through pressure difference, guide the lubricating oil to the surface of the fixed scroll, and reduce friction between the end surfaces of the fixed scroll and the movable scroll.

In order to solve the above-mentioned problems, according to one aspect of the present application, an embodiment of the present invention provides a scroll compressor including:

the oil storage cavity is also communicated with an oil groove arranged on the lower surface of the static vortex disc through the oil absorption structure;

lubricating oil is introduced into the oil storage cavity through the crankshaft, and under the action of first pressure difference, part of the lubricating oil flows into the inlet end of the oil groove through the oil absorption structure; under the action of the second pressure difference, part of lubricating oil flows from the inlet end of the oil groove to the tail part of the oil groove, and then lubrication is provided for the end face of the fixed scroll.

In some embodiments, the pressure at the point where the oil storage cavity connects to the oil absorption structure is greater than the pressure at the oil sump; the first pressure difference is the difference between the pressure at the connecting point of the oil storage cavity and the oil absorption structure and the pressure at the inlet end of the oil groove.

In some embodiments, the oil groove is an arc structure arranged around the center of the fixed scroll, and the pressure at the inlet end of the oil groove is greater than the pressure at the tail part of the oil groove; the second pressure differential is the difference between the pressure at the inlet end of the sump and the pressure at the tail of the sump.

In some embodiments, the scroll compressor further comprises an oil return assembly in communication with the oil storage cavity for diverting a remaining portion of the lubrication oil to an oil sump below the scroll compressor.

In some embodiments, the oil suction structure includes an oil applying structure disposed in the upper bracket and an oil guiding structure disposed in the fixed scroll, one end of the oil applying structure is communicated with the oil storage cavity, the other end of the oil applying structure is communicated with one end of the oil guiding structure, and the other end of the oil guiding structure is communicated with the oil groove.

In some embodiments, an end of the oil drainage structure distal from the oil sump is sealed by a first seal pin.

In some embodiments, the oiling structure comprises a horizontally arranged first channel, a vertically arranged second channel and a throttling unit, wherein the first channel is connected with the second channel, and the throttling unit is positioned on the second channel.

In some embodiments, an end of the first passage remote from the oil storage cavity is sealed by a second seal pin.

In some embodiments, the oil guiding structure comprises an oil inlet hole, an oil inlet passage and an oil outlet hole which are connected in sequence, the oil inlet hole is communicated with the oil applying structure, and the oil outlet hole is communicated with the oil groove.

According to one aspect of the present application, an embodiment of the present invention provides an air conditioner including the scroll compressor described above.

Compared with the prior art, the scroll compressor has at least the following beneficial effects:

the scroll compressor comprises a static scroll, an oil suction structure, a crankshaft and an upper bracket with an oil storage cavity, wherein the oil outlet end of the crankshaft is communicated with the oil storage cavity, and the oil storage cavity is also communicated with an oil groove formed in the lower surface of the static scroll through the oil suction structure; thus, the lubricating oil is introduced into the oil storage cavity through the crankshaft, and under the action of the first pressure difference, part of the lubricating oil flows into the inlet end of the oil groove through the oil absorption structure; under the action of the second pressure difference, part of lubricating oil flows from the inlet end of the oil groove to the tail part of the oil groove, and then lubrication is provided for the end face of the fixed scroll.

The utility model skillfully applies different pressures corresponding to different areas in the working process of the scroll compressor, firstly guides the lubricating oil to the inlet end of the oil groove, and then guides the lubricating oil to the tail part of the oil groove from the inlet end of the oil groove, so that the lubricating oil covers more end surfaces of the fixed scroll disk, and the friction of the end surfaces is reduced.

On the other hand, the air conditioner provided by the utility model is designed based on the scroll compressor, and the beneficial effects of the air conditioner refer to the beneficial effects of the scroll compressor, which are not described herein again.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of a scroll compressor according to an embodiment of the present invention;

FIG. 2 is a flow diagram of lubricating oil in a scroll compressor provided in accordance with an embodiment of the present invention;

FIG. 3 is a front view of a fixed scroll in a scroll compressor provided in accordance with an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a cross-sectional view of a fixed scroll in a scroll compressor provided in accordance with an embodiment of the present invention;

FIG. 6 is a schematic pressure distribution diagram of a scroll compressor according to an embodiment of the present invention.

Wherein:

1. a static scroll pan; 2. an oil absorbing structure; 3. a crankshaft; 4. an upper bracket; 5. an oil return assembly; 11. an oil sump; 21. an oiling structure; 22. an oil guiding structure; 23. a first seal pin; 41. an oil storage cavity; 211. a first channel; 212. a second channel; 213. a throttling unit; 214. a second seal pin; 221. an oil inlet hole; 222. an oil inlet passage; 223. an oil outlet.

Detailed Description

To further explain the technical means and effects of the present invention for achieving the intended purpose of the utility model, the following detailed description of the embodiments, structures, features and effects according to the present application will be given with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the description of the present invention, it is to be understood that the terms "vertical", "lateral", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and do not mean that the device or member to which the present invention is directed must have a specific orientation or position, and thus, cannot be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

The present embodiment provides a scroll compressor, as shown in fig. 1, the scroll compressor includes a fixed scroll 1, an oil suction structure 2, a crankshaft 3 and an upper bracket 4 having an oil storage cavity 41, an oil outlet end of the crankshaft 3 is communicated with the oil storage cavity 41, and the oil storage cavity 41 is further communicated with an oil groove 11 disposed on the lower surface of the fixed scroll 1 through the oil suction structure 2;

specifically, in the scroll compressor, the movable scroll and the fixed scroll are fitted and assembled and can rub against each other during operation, wherein the friction area of the end surfaces of the movable scroll and the fixed scroll is large, while in the embodiment, the lubricating oil is introduced into the oil storage cavity 41 through the crankshaft 3, and under the action of a first pressure difference, part of the lubricating oil flows into the inlet end of the oil groove 11 through the oil suction structure 2; under the action of the second pressure difference, part of the lubricating oil flows from the inlet end of the oil groove 11 to the tail part of the oil groove 11, and then lubrication is provided for the end face of the fixed scroll 1. Different pressures that different regions correspond in the scroll compressor working process have been used ingeniously, at first with lubricating oil drainage to the entry end of oil groove, with lubricating oil drainage to the afterbody of oil groove from the entry end of oil groove after that, and then make more terminal surfaces that cover quiet whirlpool dish of lubricating oil, reduced the friction of terminal surface.

In certain embodiments:

the pressure at the connecting point of the oil storage cavity 41 and the oil absorption structure 2 is greater than that at the oil groove 11; the first pressure difference is the difference between the pressure at the connection point of the oil storage cavity 41 and the oil suction structure 2 and the pressure at the inlet end of the oil sump 11.

Specifically, as shown in fig. 6, which is a schematic pressure distribution diagram of the scroll compressor, it can be seen that the inlet end of the oil groove 11 is in a middle pressure region, and since the oil storage cavity 41 is closer to the center of the fixed scroll 1 than the inlet end of the oil groove 11, and the center is a high pressure region, the connection point of the oil storage cavity 41 and the oil suction structure 2 is in a high pressure region; in this way, the lubricating oil can smoothly flow from the connecting point of the oil storage cavity 41 and the oil suction structure 2 at the high pressure region to the inlet end of the oil groove 11 at the intermediate pressure region. The drainage of lubricating oil is realized through the mode, the power of guiding oil is not required to be additionally increased, and the drainage device is convenient and simple.

In certain embodiments:

the oil groove 11 is an arc structure arranged around the center of the fixed scroll 1, and the pressure at the inlet end of the oil groove 11 is greater than the pressure at the tail part of the oil groove 11; the second pressure difference is the difference between the pressure at the inlet end of the oil sump 11 and the pressure at the tail of the oil sump 11.

Specifically, as shown in fig. 6, which is a schematic pressure distribution diagram of the scroll compressor, the fixed scroll 1 and the movable scroll are engaged to form each compression cavity, according to the pressure distribution, the outermost side is a low-pressure region, and after the movable scroll operates, the low-pressure region is close to the inner side, and the volume is reduced, so that the refrigerant pressure is increased to a medium pressure; the movable scroll continues to operate, the compression cavity is further reduced, the pressure is further increased to become high pressure, and finally the refrigerant is discharged through the exhaust hole.

As is apparent from fig. 6, the inlet end of the oil sump 11 is in the middle pressure region, while the tail of the oil sump 11 is in the low pressure region; thus, the lubricating oil can smoothly flow from the inlet end of the oil groove 11 at the middle pressure region to the tail end of the oil groove 11 at the low pressure region, thereby allowing the lubricating oil to fill the entire oil groove 11.

Because the oil groove 11 is an arc structure arranged around the center of the fixed scroll 1, the end surface of the fixed scroll 1 with a larger area is covered, and the lubricating oil is uniformly distributed at each position of the end surface of the fixed scroll 1 under the infiltration action of the lubricating oil and the operation drive of the movable scroll. Because the motion of moving vortex dish drives, lubricating oil can flow out from oil groove 11, and then forms a circulation, has guaranteed lubricated effect.

In addition, it should be noted that: the arc-shaped oil groove 11 is not in a regular arc shape and is related to the moving track of the orbiting scroll, and specifically, as shown in fig. 6, the distance from the inlet end of the oil groove 11 to the central point O is smaller than the distance from the tail end of the oil groove 11 to the central point O.

In certain embodiments:

the scroll compressor further comprises an oil return assembly 5, wherein the oil return assembly 5 is communicated with the oil storage cavity 41 and is used for guiding the rest part of lubricating oil to an oil pool below the scroll compressor.

Specifically, as shown by the arrows in fig. 2, the lubricating oil in the oil pool below the scroll compressor is introduced into the oil storage cavity 41 through the crankshaft 3, under the action of the first pressure difference, part of the lubricating oil flows into the inlet end of the oil groove 11 through the oil suction structure 2, and the excess lubricating oil is introduced into the oil pool below the scroll compressor through the oil return assembly 5.

In certain embodiments:

as shown in fig. 2, the oil suction structure 2 includes an oiling structure 21 disposed in the upper bracket 4 and an oil guiding structure 22 disposed in the fixed scroll 1, one end of the oiling structure 21 is communicated with the oil storage cavity 41, the other end of the oiling structure 21 is communicated with one end of the oil guiding structure 22, and the other end of the oil guiding structure 22 is communicated with the oil groove 11.

Specifically, the lubricating oil flows into the oil guiding structure 22 through the upper oil structure 21, and then flows into the oil groove 11 through the oil guiding structure 22, so as to realize the guiding of the lubricating oil.

In certain embodiments:

specifically, one end of the oil guiding structure 22 away from the oil groove 11 is sealed by a first sealing pin 23; when the oil suction structure 2 is processed, the oil guide structure 22 and the first passage 211 are both passages directly drilled inside the compressor, after the two passages are communicated, one end of the oil guide structure 22 is directly communicated with the oil groove 11, and in order to avoid oil leakage at the other end of the oil guide structure 22, the other end is sealed through the first seal pin 23.

In certain embodiments:

the upper oil structure 21 comprises a first channel 211 horizontally arranged, a second channel 212 vertically arranged and a throttling unit 213, wherein the first channel 211 is connected with the second channel 212, and the throttling unit 213 is positioned on the second channel 212.

Firstly, the first channel 211 is horizontally arranged, and the second channel 212 is vertically arranged, so that the whole structure of the scroll compressor is not damaged while the processing is simple; in addition, the throttling unit 213 can prevent the high pressure at the connection point of the oil storage cavity 41 and the oil absorption structure 2 from mixing with the medium pressure at the inlet end of the oil tank 11, and the drainage of the lubricating oil can be affected after the pressure mixing, so that the lubricating oil loses the flowing power.

In certain embodiments:

specifically, the end of the first passage 211 remote from the oil reservoir cavity 41 is sealed by the second seal pin 214; the first passage 211 and the second passage 212 are both passages directly drilled inside the compressor, and after the two passages are communicated, one end of the first passage 211 is communicated with the oil storage cavity 41, and in order to prevent oil leakage from the other end of the first passage 211, the other end of the first passage 211 is sealed by the second seal pin 214.

In order to ensure good sealing performance of the oil path and prevent oil leakage during oil guiding, a second sealing pin 214 is disposed at the joint of the first passage 211 and the second passage 212 to ensure that the flow direction of the lubricating oil can be smoothly changed.

In certain embodiments:

as shown in fig. 3 to 5, the oil guiding structure 22 includes an oil inlet hole 221, an oil inlet passage 222, and an oil outlet hole 223 connected in sequence, the oil inlet hole 221 is communicated with the upper oil structure 21, and the oil outlet hole 223 is communicated with the oil groove 11.

Specifically, the lubricating oil flowing out of the second passage 212 first enters the oil inlet hole 221, then enters the oil groove 11 through the oil inlet passage 222 and the oil outlet hole 223, and may be guided to the end surface of the fixed scroll 1 for lubrication.

The working principle of the scroll compressor provided by the embodiment for lubricating the end surfaces of the movable scroll and the fixed scroll 1 is as follows:

as shown in fig. 6, firstly, since the oil storage cavity 41 is closer to the center of the fixed scroll 1 than the inlet end of the oil groove 11, and the center is a high pressure region, the connection point of the oil storage cavity 41 and the oil absorption structure 2 is in the high pressure region, and the oil outlet 223 is in the medium pressure region, so that the lubricating oil can be ensured to flow from the connection point of the oil storage cavity 41 and the oil absorption structure 2 in the high pressure region to the inlet end of the oil groove 11 in the medium pressure region; secondly, the oil outlet 223 is in a medium-pressure area, the head of the whole oil groove 11 and the tail of the oil groove 11 are in a low-pressure area, so that the pressure distribution gradient in the oil groove 11 can be ensured, and the lubricating oil is completely and uniformly distributed in the oil groove; finally, the lubricating oil is uniformly distributed at each position of the end face by virtue of the infiltration function of the lubricating oil and the operation driving of the movable scroll disk, and the lubricating oil can leave from the oil groove 11 due to the operation driving of the movable scroll disk, so that the circulation of oil guiding and deoiling can be formed, and the lubricating effect of the end face of the fixed scroll disk 1 is ensured.

Example 2

The present embodiment provides an air conditioner including the scroll compressor in embodiment 1.

This embodiment is through using the scroll compressor in embodiment 1 in the air conditioner, because the lubrication effect of static vortex dish and movable vortex dish terminal surface has obtained the assurance among the scroll compressor, and whole scroll compressor's performance has just obtained the assurance, and then makes the air conditioner have more reliable performance.

In summary, it is easily understood by those skilled in the art that the advantageous technical features described above can be freely combined and superimposed without conflict.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.

Claims (10)

1. A scroll compressor is characterized by comprising a fixed scroll (1), an oil suction structure (2), a crankshaft (3) and an upper bracket (4) with an oil storage cavity (41), wherein the oil outlet end of the crankshaft (3) is communicated with the oil storage cavity (41), and the oil storage cavity (41) is also communicated with an oil groove (11) arranged on the lower surface of the fixed scroll (1) through the oil suction structure (2);

lubricating oil is introduced into the oil storage cavity (41) through the crankshaft (3), and under the action of a first pressure difference, part of the lubricating oil flows into the inlet end of the oil groove (11) through the oil suction structure (2); and under the action of a second pressure difference, the part of lubricating oil flows from the inlet end of the oil groove (11) to the tail part of the oil groove (11), so that the lubricating oil is provided for the end surface of the fixed scroll (1).

2. The scroll compressor of claim 1, wherein the pressure at the point of connection of the oil storage cavity (41) to the oil suction structure (2) is greater than the pressure at the oil sump (11); the first pressure difference is the difference value between the pressure at the connecting point of the oil storage cavity (41) and the oil absorption structure (2) and the pressure at the inlet end of the oil groove (11).

3. A scroll compressor according to claim 1 or 2, wherein the oil groove (11) is of an arc structure provided around the center of the fixed scroll (1), and a pressure at an inlet end of the oil groove (11) is greater than a pressure at an end of the oil groove (11); the second pressure difference is the difference value of the pressure at the inlet end of the oil tank (11) and the pressure at the tail part of the oil tank (11).

4. The scroll compressor of claim 1 or 2, further comprising an oil return assembly (5), the oil return assembly (5) communicating with an oil storage cavity (41) for diverting a remaining portion of the lubrication oil into an oil sump below the scroll compressor.

5. The scroll compressor of claim 1, wherein the oil suction structure (2) comprises an upper oiling structure (21) provided in the upper bracket (4) and an oil guiding structure (22) provided in the fixed scroll (1), one end of the upper oiling structure (21) is communicated with the oil storage cavity (41), the other end of the upper oiling structure (21) is communicated with one end of the oil guiding structure (22), and the other end of the oil guiding structure (22) is communicated with the oil groove (11).

6. A scroll compressor according to claim 5, wherein the end of the oil guiding structure (22) remote from the oil sump (11) is sealed by a first sealing pin (23).

7. The scroll compressor of claim 6, wherein the upper oil structure (21) comprises a horizontally disposed first passage (211), a vertically disposed second passage (212), and a throttling unit (213), the first passage (211) and the second passage (212) being connected, the throttling unit (213) being located on the second passage (212).

8. The scroll compressor of claim 7, wherein an end of the first passage (211) remote from the oil storage cavity (41) is sealed by a second seal pin (214).

9. The scroll compressor according to any one of claims 5 to 7, wherein the oil introducing structure (22) comprises an oil inlet hole (221), an oil inlet passage (222) and an oil outlet hole (223) which are connected in sequence, the oil inlet hole (221) is communicated with the upper oil structure (21), and the oil outlet hole (223) is communicated with the oil groove (11).

10. An air conditioner characterized in that it comprises a scroll compressor according to any one of claims 1 to 9.

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