CN117028262A

CN117028262A - Scroll compressor and air conditioner

Info

Publication number: CN117028262A
Application number: CN202311223143.4A
Authority: CN
Inventors: 李晓文; 廖熠; 徐嘉
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2023-09-21
Filing date: 2023-09-21
Publication date: 2023-11-10

Abstract

The application provides a scroll compressor and an air conditioner, which can solve the technical problem that lubricating oil cannot flow back to an oil pool in time due to the fact that air blows to a motor assembly in the prior art; the scroll compressor comprises a shell, wherein an upper bracket and a motor assembly are arranged in the shell; the upper bracket is close to the top of the shell, and the motor component is far away from the top of the shell; an exhaust cavity is formed between the upper bracket and the motor component, an exhaust port facing the exhaust cavity is arranged on the upper bracket, an air guide piece is arranged in the exhaust cavity, the air guide piece is provided with an air guide channel, the air guide channel comprises an air outlet section, the air guide channel comprises an air inlet and a first air outlet, the air inlet is communicated with the exhaust port, the first air outlet is an outlet of the air outlet section, and the air outlet section can enable air exhausted by the first air outlet to flow obliquely upwards.

Description

Scroll compressor and air conditioner

Technical Field

The application belongs to the technical field of air conditioners, and particularly relates to a scroll compressor and an air conditioner.

Background

The compressor is heart of air conditioning system, its performance is directly related to energy efficiency ratio of air conditioner, in which the vortex compressor belongs to positive displacement compressor, and the motor is used for driving crankshaft to make rotation, and the movable vortex disk is driven by crankshaft to make revolution and translation around the static vortex disk so as to implement periodic change of closed volume and attain the goal of compressing gas. In the compression and flow processes of the gas, the refrigerant and the lubricating oil can be mutually dissolved in a certain proportion, when the compressor is exhausted, the lubricating oil can be discharged out of the compressor along with the refrigerant, so that the lubricating oil of the compressor is reduced, and meanwhile, the refrigerant is mixed with excessive lubricating oil to reduce the heat exchange efficiency and reduce the energy efficiency. As scroll compressors are increasingly developed to a large discharge rate and a high speed, matched systems are increasingly larger, lubricating oil taken away in unit time is increased, and oil shortage and energy efficiency are further deteriorated.

In order to solve the problem of oil-gas mixing during the operation of the scroll compressor, the compressor is required to be internally provided with an oil-gas separation device, so that the oil content is reduced, and the energy efficiency and the reliability are improved.

In the prior art, as shown in fig. 7, patent CN202120379135.9 adds an oil gas guiding portion on the exhaust path of the compressor, the oil gas guiding portion is connected with the housing, a second exhaust channel and an oil return channel are formed between the outer surface of the oil gas guiding portion and the inner wall surface of the housing, the inlet end of the second exhaust channel is communicated with the first exhaust channel, the outlet end of the second exhaust channel is communicated with the outlet end of the oil return channel, and the inlet end of the oil return channel is communicated with the cavity provided with the pump body assembly. By adopting the compressor structure, the oil discharge rate of the compressor is reduced, the oil level of an oil pool inside the compressor is stabilized, and the operation of the compressor is ensured to be more reliable and stable; however, when the compressor rotates at high frequency, gas blows up the lubricating oil on the upper end face of the motor assembly, so that the separated lubricating oil is mixed into the refrigerant again, the lubricating oil in the oil sump is still insufficient, and the phenomenon of oil shortage occurs.

In another prior art, as shown in fig. 8, patent CN202011408197.4 adds an oil-gas guiding part on the exhaust path of the compressor, wherein the air outlet of the guiding channel is provided with an oil-gas separating component, so as to further separate the frozen oil in the gaseous refrigerant and reduce the oil carrying rate of the exhaust gas of the compressor; although this patent has reached oil-gas separation's effect, but too much adhesion of lubricating oil is on the separation subassembly, can't in time flow back to the oil sump, still can appear lacking oily phenomenon.

Disclosure of Invention

Therefore, the application provides a scroll compressor and an air conditioner, which can solve the technical problem that lubricating oil cannot flow back to an oil pool in time due to the fact that air blows to a motor assembly in the prior art.

In one aspect, the present application provides a scroll compressor comprising a housing having an upper bracket and a motor assembly disposed therein; the upper bracket is close to the top of the shell, and the motor component is far away from the top of the shell; the upper bracket is provided with an exhaust port facing the exhaust cavity, an air guide piece is arranged in the exhaust cavity, the air guide piece is provided with an air guide channel, the air guide channel comprises an air outlet section, the air guide channel comprises an air inlet and a first air outlet, the air inlet is communicated with the exhaust port, the first air outlet is an outlet of the air outlet section, and the air outlet section can enable air exhausted by the first air outlet to flow obliquely upwards.

In some embodiments, the gas exit segment is a straight segment, the gas exit segment extending obliquely upward;

or alternatively, the first and second heat exchangers may be,

the air outlet section is an arc section, and the included angle between the tangent line L passing through any point on the first air outlet and the vertical direction is theta, wherein theta is more than 0 degrees and less than 90 degrees.

In some embodiments, the upper bracket includes a stiffener protruding toward the motor assembly, the stiffener provided with a first separating surface;

when the air outlet section is a straight line section, the inner wall surface of the air outlet section extends towards the direction of the first separation surface and can intersect with the first separation surface;

when the air outlet section is an arc section, the first air outlet extends along the tangential line L towards the direction of the first separation surface and can intersect with the first separation surface.

In some embodiments, the air guide member is formed by a metal plate, the metal plate is abutted against the inner wall surface of the casing, and the air guide channel is located between the metal plate and the inner wall surface of the casing; the air outlet section extends along the circumferential direction of the casing and gradually slopes upward.

In some embodiments, the upper bracket is provided with a second separation surface facing the motor assembly, the second separation surface being located above the first separation surface, the second separation surface and the gas outlet section being located on the same side of the first separation surface, the first separation surface being capable of allowing a portion of the gas passing through the first separation surface to flow to the second separation surface.

In some embodiments, the scroll compressor further comprises a crankshaft passing through the discharge chamber, the discharge chamber having a balancing assembly disposed therein that follows rotation of the crankshaft;

the second separation surface is capable of allowing a portion of the gas passing through the second separation surface to flow downwardly through the turning region of the balancing assembly.

In some embodiments, the air guide channel further comprises an air inlet section, the air inlet is an inlet of the air inlet section, a third separation surface is arranged between the air inlet section and the air outlet section, and part of air entering the air inlet section can collide with the third separation surface; and a second air outlet facing the motor assembly is arranged between the third separation surface and the air outlet section.

In some embodiments, the flow area of the air inlet is S1, the flow area of the first air outlet is S2, and the area of the second air outlet is S3, then:

S3＜0.5S1；S3＜S2。

in some embodiments, the air inlet section extends along a vertical direction, the third separation surface is of a planar structure, the separation plane gradually inclines from top to bottom towards the direction of the air outlet section, and an included angle between the extending direction of the air inlet section and the vertical direction is alpha, and 10 degrees is less than alpha and less than 60 degrees.

In some embodiments, the third separation surface is a concave cambered surface structure, and an upper end of the third separation surface is tangent to an inner wall surface of the air inlet section.

In some embodiments, the direction in which the air outlet section extends in the circumferential direction of the inner wall surface of the casing coincides with the rotational direction of the crankshaft 4.

The application also provides an air conditioner comprising the vortex compressor.

According to the application, the gas is discharged obliquely upwards when discharged from the first gas outlet, so that the gas is prevented from being directly blown to the upper end face of the motor assembly, and further, lubricating oil on the upper end face of the motor assembly is prevented from being blown into the gas again, so that the lubricating oil can flow back into an oil pool below the motor assembly in time, oil shortage of the oil pool is avoided, and the performance of the scroll compressor is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. The drawings in the following description are merely exemplary and other implementations drawings may be derived from the drawings provided without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a scroll compressor according to an embodiment of the present application at a first view angle;

FIG. 2 is a schematic view of a scroll compressor according to an embodiment of the present application from a second perspective;

FIG. 3 is a schematic view of an air guide structure according to an embodiment of the present application;

FIG. 4 is an oblique view of an upper rack according to an embodiment of the present application;

FIG. 5 is a bottom view of an upper rack according to an embodiment of the present application;

FIG. 6 is an enlarged view of the portion A of FIG. 5 in accordance with an embodiment of the present application;

FIG. 7 is a first prior art;

fig. 8 is a second prior art.

The reference numerals are expressed as:

1. a housing; 101. an upper cover; 102. a lower cover; 2. a motor assembly; 301. an upper bracket; 3011. a reinforcing block; 302. a lower bracket; 303. a bearing; 304. a shaft shoulder; 3051. an exhaust port; 305. a diversion trench; 4. an exhaust chamber; 5. an air guide; 6. an air guide channel; 601. a first outlet; 602. a second outlet; 603. an air inlet section; 604. an air outlet section; 701. a first separating surface; 702. a second separation surface; 703. a third separating surface; 704. a balancing assembly; 801. an air suction pipe; 802. an exhaust pipe; 9. and (5) an oil pool.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. It should be understood, however, that the construction, proportion, and size of the drawings, in which the present application is practiced, are all intended to be illustrative only, and not to limit the scope of the present application, which should be defined by the appended claims. Any structural modification, proportional change or size adjustment should still fall within the scope of the disclosure without affecting the efficacy and achievement of the present application. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present application, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present application.

To this end, the present application provides a scroll compressor, as shown in fig. 1 to 6, comprising a casing 1, an upper bracket 301 and a motor assembly 2 provided inside the casing 1; the upper bracket 301 is close to the top of the casing 1, and the motor assembly 2 is far away from the top of the casing 1; the upper bracket 301 and the motor assembly 2 form an exhaust cavity 4 therebetween, and the upper bracket 301 is provided with an exhaust port 3051 facing the exhaust cavity 4, which is characterized in that an air guide 5 is arranged in the exhaust cavity 4, the air guide 5 is provided with an air guide channel 6, the air guide channel 6 comprises an air outlet section 604, the air guide channel 6 comprises an air inlet and a first air outlet 601, the air inlet is communicated with the exhaust port 3051, the first air outlet 601 is an outlet of the air outlet section 604, and the air outlet section 604 can enable air exhausted by the first air outlet 601 to flow obliquely upwards.

The upper and lower directions in the application are the directions when the scroll compressor is vertically arranged, namely, the crankshaft of the scroll compressor is in the vertical direction.

The gas discharged from the gas outlet 3051 is high-pressure gas (high-pressure oil-gas mixture), and the high-pressure gas flows out from the gas outlet 3051 at a higher speed; the high-pressure gas discharged downwards from the gas outlet 3051 is changed to be discharged upwards obliquely through the first gas outlet 601 by the gas outlet section 604 of the gas guide 5, so that the fast-flowing gas is prevented from being directly blown to the upper end face of the motor assembly 2, lubricating oil on the upper end face of the motor assembly 2 is blown up and mixed into the gas, and the lubricating oil mixed into the gas can lead to the reduction of the lubricating oil flowing back to the oil pool 9; so as to ensure that enough lubricating oil flows back to the oil pool 9 and avoid the phenomenon of oil shortage of the compressor. Especially, when the compressor is operated at high frequency, the amount of gas discharged from the compressor is larger, and the flow rate of gas flowing out through the gas outlet 3051 is larger, if the gas is directly blown to the upper end surface of the motor assembly 2 at this time, more lubricating oil will be blown up, resulting in serious oil shortage of the oil pool 9.

The flow process of the refrigerant (when the vortex compression is applied to a refrigerating system, the gas is the refrigerant) is as follows: the refrigerant gas subjected to heat exchange from the system enters a compressor suction pipe 801, the refrigerant gas enters the inside of a pump body fixed scroll from the suction pipe 801 for compression, meanwhile, the refrigerant gas and lubricating oil in the pump body are mixed and mutually dissolved in the compression process, and the compressed refrigerant gas is changed into a high-pressure oil-gas mixture from low-pressure gas; the high-pressure oil-gas mixture first enters the high-pressure cavity above the static disc, and then is discharged downwards from the static disc and the diversion trench 305 on the outer circle of the upper bracket 301 (i.e. discharged from the exhaust port 3051) and enters the air guide channel 6.

The scroll compressor mainly achieves the purpose of oil separation by changing the flowing direction or the flowing speed of an oil-gas mixture discharged by a pump body, and the concrete method is that an oil blocking cap or an exhaust guide plate is added on a shafting, the higher the discharge capacity of the scroll compressor is, the higher the rotating speed is, the separated oil cannot pass through a motor to reach a bottom oil pool 9 in time, so that lubricating oil is accumulated on the upper end face of a motor assembly 2; if the gas is directly blown to the upper end face of the motor assembly 2, the gas and the oil are secondarily mixed, so that the oil circulation rate of the scroll compressor is too high, the oil quantity of the oil pool 9 is insufficient, the oil circulation rate of the air conditioning system is increased, the heat exchange effect of the air conditioning heat exchanger is reduced, and the actual capacity of the air conditioner is reduced; meanwhile, the oil-free (oil-deficient) state can be caused in the compressor, and the reliability of the compressor is reduced; the increase in oil circulation rate means that the suction volume of the compressor is replaced by a portion of the refrigerating machine oil, which reduces the refrigerating capacity of the compressor, and in severe cases, the sucked refrigerating machine oil also causes the breakage of the scroll of the compressor, directly disabling the scroll compressor.

Preferably, the air outlet section 604 is a straight section, and the air outlet section 604 extends obliquely upwards;

or alternatively, the first and second heat exchangers may be,

the air outlet section 604 is an arc section, and the included angle between the tangent line L passing through any point on the first air outlet 601 and the vertical direction is θ, where θ is more than 0 ° and less than 90 °.

When the air outlet section 604 is a straight line section, the speed of the air discharged from the first air outlet 601 is improved, but the air flowing noise is larger; when the gas outlet section 604 is an arc section, the gas flows in the gas outlet section 604 and has a larger acting force with the inner wall surface of the gas outlet section 604, and the acting force can separate lubricating oil in the gas, so that the oil-gas separation efficiency is improved; meanwhile, the air outlet section 604 of the arc section has a blocking effect on noise, and can reduce the transmission of the noise.

Preferably, as shown in fig. 1-2, the upper bracket 301 includes a reinforcing block 3011 protruding toward the motor assembly 2, the reinforcing block 3011 being provided with a first separating surface 701; when the air outlet section 604 is a straight section, the inner wall surface of the air outlet section 604 extends toward the first separation surface 701 so as to intersect with the first separation surface 701;

when the air outlet section 604 is an arc section, the first air outlet 601 extends along the tangent line L toward the first separating surface 701 so as to intersect with the first separating surface 701.

Most of the gas discharged from the first gas outlet 601 flows to the first separation surface 701, and the gas collides with the first separation surface 701 to perform oil-gas separation, so that the content of lubricating oil in the gas is reduced, and the separated lubricating oil flows back to the oil tank to avoid oil shortage of the oil tank.

The reinforcing block 3011 is abutted against the inner wall surface of the casing 1 and fixedly connected with the casing 1, and the existing function of the reinforcing block 3011 is to strengthen the firmness between the upper bracket 301 and the casing 1; a first separation surface 701 opposite to the first air outlet 601 is arranged on the existing reinforcing block 3011, and a space is formed between the first separation surface 701 and the first air outlet 601; the mixed gas collides with the first separation surface 701 after being blown out from the first air outlet 601, and in the collision process, lubricating oil contained in the mixed gas is separated from the gas and adheres to the first separation surface 701, and the lubricating oil adhered to the first separation surface 701 flows down onto the upper end surface of the motor assembly 2 under the action of gravity. Therefore, the mixed gas is subjected to primary oil-gas separation, the purity of the gas is improved, the oil quantity of lubricating oil flowing back to the oil pool 9 is improved, and the phenomenon of oil shortage of the scroll compressor is avoided.

The reinforcing block 3011 opposite to the first air outlet 601 can be lengthened, so that the air discharged from the first air outlet 601 collides with the first separation surface 701 on the reinforcing block 3011 as much as possible, and the oil-gas separation efficiency is improved.

When the first separation surface 701 is a plane, an included angle between the direction in which the gas flows out of the first gas outlet 601 and the first separation surface 701 is an obtuse angle, and the obtuse angle faces the middle part of the casing 1, so that the gas can flow toward the middle part of the casing 1 (the direction close to the crankshaft) after passing through the first separation surface 701. The first separation surface 701 is in a vertical state, and since the gas flows upward when flowing out from the first gas outlet 601, the gas continues to flow upward after passing through the first separation surface 701 in a vertical state.

Preferably, as shown in fig. 1-2, the air guide member 5 is formed by a metal plate, the metal plate is abutted against the inner wall surface of the casing 1, and the air guide channel 6 is located between the metal plate and the inner wall surface of the casing 1; the air outlet section 604 extends along the circumferential direction of the casing 1 and gradually slopes upward.

The panel beating is in the same place with casing 1 welding, and air duct 6 extends along the internal face of casing 1, has reduced the occupation to exhaust chamber 4 space, has simplified the structure of air guide 5, is favorable to the cost reduction. The air guide channel 6 is adjacent to the inner wall surface of the casing 1, so that the air can move along the inner wall surface of the casing 1 after being discharged from the first air outlet 601, and then the air can flow to the first separation surface 701 along the inner wall surface of the casing 1, and the inner wall surface of the casing 1 has a certain limit on the air flow, so that as much air collides with the first separation surface 701 as possible, and the oil-gas separation efficiency is improved.

The inlet of the air guide passage 6 completely covers the air outlet 3051, so that the air discharged from the air outlet 3051 completely enters the air guide passage 6.

Preferably, as shown in fig. 4, the upper bracket 301 is provided with a second separation surface 702 facing the motor assembly 2, the second separation surface 702 is located above the first separation surface 701, the second separation surface 702 and the air outlet section 604 are located on the same side of the first separation surface 701, and the first separation surface 701 enables a part of the air passing through the first separation surface 701 to flow to the second separation surface 702.

The first separation surface 701 is capable of enabling the gas passing through the first separation surface 701 to flow to the second separation surface 702, and the angle of the first separation surface 701 enables the gas passing through the reflection and diversion of the first separation surface 701 to flow to the second separation surface 702. As shown in fig. 6, the included angle γ between the gas and the first separation surface 701 is an acute angle, so that the gas can flow toward the center near the crankshaft; since the gas flows obliquely upward after being discharged from the first gas outlet 601, the included angle between the flow direction of the gas and the first separation surface 701 is an acute angle, and when the acute angle is downward, the gas flows upward after being reflected by the first separation surface 701 and guided by the first separation surface; that is, after passing through the first separation surface 701, the gas flows upward in the direction of the crankshaft at the same time, so that the gas can flow to the second separation surface 702.

It should be noted that the fluid flow is relatively complex, and the flow direction referred to herein is the main flow direction of the gas, and the flow of the gas at all flow rates is not required to be performed according to the design.

The mixed gas subjected to oil-gas separation through the first separation surface 701 flows towards the second separation surface 702 and collides with the second separation surface 702, and when the mixed gas collides with the second separation surface 702, the mixed gas is subjected to oil-gas separation again, and the separated lubricating oil adheres to the second separation surface 702 and flows to the upper end surface of the motor assembly 2 under the action of gravity; the mixed gas separated by the second separation surface 702 contains less lubricating oil, and more lubricating oil can flow back to the oil sump 9, so that the phenomenon of oil shortage of the scroll compressor is avoided.

Preferably, as shown in fig. 1, a balance assembly (704) is arranged on the crankshaft and is positioned below the second separation surface 702, and the balance assembly (704) is positioned in the exhaust cavity (4) and rotates along with the crankshaft;

the second separation surface (702) enables a portion of the gas passing through the second separation surface (702) to flow downwardly through a rotational region of the balancing assembly (704).

The reason why the second separation surface 702 enables the gas to flow toward the balance assembly 704 is the same as the first separation surface 701, and when the second separation surface 702 is a plane, the angle of the gas to the second separation surface 702 enables the gas to flow downward toward the rotation area of the balance assembly 704.

The rotation area of the balancing assembly 704 is: a counterweight assembly 704 (typically comprising two parts of a counterweight and a counterweight cover) secured to the crankshaft follows the region through which the crankshaft rotates. The rotational area of the crankshaft includes the area between the reinforcement block 3011 and the shoulder 304.

After passing through the second separation surface 702, the gas enters the rotation area of the balance assembly 704 and moves circularly along the rotation direction of the balance assembly 704, part of the lubricating oil in the mixed gas adheres to the balance assembly 704, part of the lubricating oil moves towards the outer edge under the action of centrifugal force and adheres to the inner wall of the machine shell 1, and the lubricating oil adhered to the balance assembly 704 and the inner wall of the machine shell 1 flows downwards to the upper end face of the motor assembly 2 under the action of gravity. Through the setting, oil-gas separation is further carried out on the mixed gas, the lubricating oil mixed in the mixed gas is reduced, the corresponding increase can flow into the lubricating oil of the oil sump 9, the oil shortage of the oil sump 9 is avoided, the oil shortage of the scroll compressor is avoided, and the performance of the scroll compressor is further improved.

Preferably, as shown in fig. 3, the air guide channel 6 further includes an air inlet section 603, the air inlet is an inlet of the air inlet section 603, a third separation surface 703 is disposed between the air inlet section 603 and the air outlet section 604, and a part of the air entering the air inlet section 603 can collide with the third separation surface 703; a second air outlet 602 is provided between the third separating surface 703 and the air outlet section 604, which faces the motor assembly 2.

The mixed gas entering the gas guide channel 6 separates lubricating oil in the mixed gas when colliding with the third separation surface 703, the separated lubricating oil flows to the second gas outlet 602 under the driving of gravity and the flow of the mixed gas, and the lubricating oil and part of the mixed gas flow to the upper end surface of the motor assembly 2 after flowing out from the second gas outlet 602. Through the arrangement, the mixed gas is subjected to primary oil-gas separation, and separated lubricating oil can be timely discharged from the second air outlet 602, so that the lubricating oil contained in the mixed gas is reduced, enough lubricating oil can flow back to the oil tank 9, and the oil shortage of the oil tank 9 is avoided; the separated lubricating oil is timely discharged from the second air outlet 602, so that the lubricating oil separated by the third separation surface 703 is prevented from being taken away by the gas again and mixed into the gas, and the oil-gas separation efficiency is improved.

The second air outlets 602 may be disposed in plural, and the plural second air outlets 602 are all directed downward.

The air inlet section 603 is vertical, the air outlet section 604 is obliquely arranged, the included angle between the air outlet section 604 and the air inlet section 603 is beta, and beta is more than 0 degrees and less than 90 degrees.

Preferably, the flow area of the air inlet is S1, the flow area of the first air outlet 601 is S2, and the area of the second air outlet 602 is S3, then:

S3＜0.5S1；S3＜S2。

through the arrangement, the gas entering the gas guide channel 6 mainly enters the gas outlet section 604, and less gas can flow out from the second gas outlet 602, and the second gas outlet 602 directly downwards leads to the upper end face of the motor assembly 2, so that the gas directly blowing to the upper end face of the motor assembly 2 through the second gas outlet 602 can be reduced, the disturbance of lubricating oil on the upper end face of the motor assembly 2 is reduced, and the lubricating oil on the upper end face of the motor assembly 2 can flow into the oil pool 9 downwards as soon as possible. That is, the gas entering the gas guide channel 6 is reduced to mainly enter the gas outlet section 604 and flow out from the first gas outlet 601, and the gas flowing out from the first gas outlet 601 does not affect the lubricating oil on the upper end face of the motor assembly 2; thus, when the vortex pressure and the rotating speed are higher, the influence on the return flow of the lubricating oil is correspondingly reduced because less gas flows out through the second gas outlet 602, and the abnormal oil shortage of the lubricating oil in the oil sump 9 is avoided.

Preferably, as shown in fig. 3, the air inlet section 603 extends along a vertical direction, the third separating surface 703 has a planar structure, the separating surface gradually slopes from top to bottom toward the air outlet section 604, and an angle α between the extending direction of the air inlet section 603 and the vertical direction is 10 ° < α < 60 °.

The third separation surface 703 is made to be a separation plane, so that the intensity of collision between the gas and the third separation surface 703 can be improved, the oil-gas separation efficiency is improved, the gas can flow towards the gas outlet section 604 after being reflected by the separation plane by making 10 degrees less than alpha less than 60 degrees, the gas flowing out of the second gas outlet 602 is reduced, the gas flowing out of the gas outlet section 604 is ensured, the flow rate of the gas flowing out of the second gas outlet 602 is favorably improved, the intensity of collision between the gas flowing out of the second gas outlet 602 and the first separation surface 701 is further ensured, and the oil-gas separation efficiency when the mixed gas collides with the first separation surface 701 is further improved.

Preferably, the third separation surface (703) is a concave arc surface structure, and the upper end of the third separation surface (703) is tangent to the inner wall surface of the air inlet section (603).

The third separation surface 703 is a concave separation surface, so that the intensity of the mixed gas when colliding with the third separation surface 703 is reduced, the kinetic energy loss of the mixed gas when colliding with the third separation surface 703 is reduced, the speed of the gas when entering the gas outlet section 604 is increased, and the oil-gas separation efficiency of the mixed gas when colliding with the first separation surface 701 after being discharged from the gas outlet section 604 is further ensured.

Preferably, the direction in which the air outlet section 604 extends in the circumferential direction of the inner wall surface of the casing 1 coincides with the rotational direction of the crankshaft 4.

In the present application, the fact that the direction in which the air outlet section 604 extends along the inner wall surface of the casing 1 coincides with the rotational direction of the crankshaft 4 means that the direction in which the air outlet section 604 extends coincides with the rotational direction of the crankshaft 4 when viewed in the axial direction of the crankshaft 4; in this way, the circumferential direction of the gas when flowing out from the gas outlet section 604 coincides with the rotational direction of the crankshaft. For example, looking from top to bottom in the axial direction of the crankshaft: the direction of rotation of the crankshaft 4 is clockwise, and the gas flows out of the gas outlet section 604 is also clockwise.

The gas flows obliquely upward along the inner wall surface of the casing 1, and also flows circumferentially along the inner wall surface of the casing 1; the circumferential extending direction of the air outlet section 604 along the inner wall surface of the casing 1 is consistent with the rotating direction of the crankshaft 4, so that the circumferential flowing direction of the air along the inner wall surface of the casing 1 is consistent with the rotating direction of the crankshaft, and the rotation of the crankshaft (comprising a balance assembly 704 arranged on the crankshaft) can cause the air to do circular motion in the air outlet cavity 4 faster, thereby improving the oil-gas separation efficiency; accordingly, stability of gas movement is guaranteed, generation of turbulent flow is prevented, flow resistance loss is greatly increased, power is increased, and oil-gas separation efficiency is improved.

The scroll compressor is vertically arranged in an outer machine of an air conditioner, the machine shell 1 comprises an upper cover 101 and a lower cover 102, an air suction pipe 801 is arranged on the upper cover 101, the lower cover 102 forms the bottom of the machine shell 1, an oil pool 9 is arranged above the lower cover 102 and between the lower cover 102 and a lower bracket 302, and a bearing 303 and a shaft shoulder 304 are arranged on the upper bracket 301.

The refrigerant flowing process of the air conditioner during working is as follows: the refrigerant gas subjected to heat exchange from the system enters a suction pipe 801 of the scroll compressor, the refrigerant gas enters the inside of a fixed scroll of the pump body from the suction pipe 801 for compression, meanwhile, the refrigerant gas and lubricating oil in the pump body are mixed and mutually dissolved in the compression process, and the compressed refrigerant gas is changed into a high-pressure oil-gas mixture from low-pressure gas; the high-pressure oil-gas mixture enters the high-pressure cavity above the static disc from the high-pressure outlet of the static disc, then is discharged downwards from the static disc and the diversion trench 305 (the air outlet 3051 is the outlet of the diversion trench 305 facing the air exhaust cavity 4) on the outer circle of the upper bracket 301 and enters the air guide channel 6, the refrigerant (mixed with lubricating oil and called refrigerant below) flows downwards along the air inlet section 603 of the air guide channel 6, part of the refrigerant collides with the third separation surface 703, the refrigerant completes the first oil-gas separation in the collision process with the third separation surface 703, part of the lubricating oil adheres to the third separation surface 703 and flows into the second air outlet 602 under the driving of gravity and the flow of the refrigerant, and the downward flow of the refrigerant in the second air outlet 602 is quickened when a small part of the refrigerant flows out through the second air outlet 602; more refrigerant enters the air outlet section 604 and flows obliquely upwards along the air outlet section 604, and as the air guide channel 6 extends obliquely upwards along the circumferential direction of the inner wall surface of the shell 1, the refrigerant moves upwards along the circumferential direction of the inner wall surface of the shell 1 in the air guide channel 6; the refrigerant flows out from the first air outlet 601 and collides with the first separation surface 701, the collision process with the first separation surface 701 completes the second oil-gas separation, and the lubricating oil adheres to the first separation surface 701 and moves downwards under the action of gravity; due to the design of the first separating surface 701, the refrigerant colliding with the first separating surface 701 moves upwards and moves towards the direction close to the crankshaft (namely, close to the center), the refrigerant collides with the second separating surface 702 again, the third oil-gas separation is completed by colliding with the second separating surface 702, and the lubricating oil adheres to the second separating surface 702 and moves downwards under the action of gravity; because the design of the second separation surface 702 enables the refrigerant to move downwards mainly after passing through the second separation surface 702, and a small part of the refrigerant is reflected by the shaft shoulder 304 and the bearing 303 and then moves downwards, the refrigerant moving downwards enters a rotating area of the balance assembly 704 (comprising the balance cover and the balance block), the crankshaft drives the balance assembly 704 to rotate, the balance assembly 704 rotates to drive the refrigerant entering the rotating area to do circular motion, when in circular motion, lubricating oil in the refrigerant is separated out under the action of centrifugal force and is adhered to the balance assembly 704 and the inner wall of the shell 1, the flow of the lubricating oil of the refrigerant is split into fourth oil-gas separation by the rotation of the balance assembly 704, and the separated lubricating oil is adhered to the lubricating oil on the balance assembly 704 and the inner wall of the shell 1 to flow downwards under the action of gravity; and the refrigerant after the fourth oil-gas separation is discharged from the exhaust pipe 802. All the downward flowing lubricating oil finally flows onto the upper end face of the motor assembly 2 and flows downward into the oil pool 9 from the oil path between the motor stator and the inner wall of the casing 1. The refrigerant flows out from the exhaust pipe 802 from entering the diversion channel, and is subjected to first oil-gas separation, second oil-gas separation, third oil-gas separation and fourth oil-gas separation in sequence, so that the oil-gas separation efficiency is improved as much as possible, and the separated lubricating oil flows back to the oil tank 9, so that the oil shortage of the oil tank 9 is avoided. The first separating surface 701 and the second separating surface 702 not only separate oil from gas of the refrigerant, but also change the flowing direction of the refrigerant, so that the refrigerant flows from the oblique upward direction to the downward direction and enters the rotating area of the balancing component 704, and the refrigerant can complete the fourth oil from gas separation. The refrigerant is discharged from the air outlet section 604 and flows out obliquely upwards, so that the refrigerant is prevented from being directly blown to the upper end face of the motor assembly 2, and further, the phenomenon that the lubricating oil on the upper end face of the motor assembly 2 is blown again by the refrigerant to cause the lubricating oil to be involved in the refrigerant again, and the oil pool 9 is short of oil is avoided.

Those skilled in the art will readily appreciate that the advantageous features of the various aspects described above may be freely combined and stacked without conflict.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application. The foregoing is merely a preferred embodiment of the present application, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present application, and these modifications and variations should also be regarded as the scope of the application.

Claims

1. A scroll compressor comprising a housing (1), an upper bracket (301) and a motor assembly (2) being arranged inside the housing (1); the upper bracket (301) is close to the top of the machine shell (1), and the motor assembly (2) is far away from the top of the machine shell (1); the novel air conditioner is characterized in that an air guide piece (5) is arranged in the air exhaust cavity (4), the air guide piece (5) is provided with an air guide channel (6), the air guide channel (6) comprises an air outlet section (604), the air guide channel (6) comprises an air inlet and a first air outlet (601), the air inlet is communicated with the air outlet (3051), the first air outlet (601) is an outlet of the air outlet section (604), and the air outlet section (604) can enable air exhausted by the first air outlet (601) to flow obliquely upwards.

2. The scroll compressor of claim 1, wherein the gas outlet section (604) is a straight section, the gas outlet section (604) extending obliquely upward;

or alternatively, the first and second heat exchangers may be,

the air outlet section (604) is an arc section, and the included angle between the tangent line L passing through any point on the first air outlet (601) and the vertical direction is theta, wherein theta is more than 0 degrees and less than 90 degrees.

3. The scroll compressor according to claim 2, wherein the upper bracket (301) comprises a reinforcement block (3011) protruding towards the motor assembly (2), the reinforcement block (3011) being provided with a first separation surface (701);

when the air outlet section (604) is a straight section, the inner wall surface of the air outlet section (604) extends towards the direction of the first separation surface (701) and can intersect with the first separation surface (701);

when the air outlet section (604) is an arc section, the first air outlet (601) extends along the tangent line L towards the first separating surface (701) and can intersect with the first separating surface (701).

4. A scroll compressor according to claim 3, wherein the air guide (5) is constituted by a sheet metal which is abutted against an inner wall surface of the casing (1), the air guide passage (6) being located between the sheet metal and the inner wall surface of the casing (1); the air outlet section (604) extends along the circumferential direction of the casing (1) body and gradually slopes upwards.

5. A scroll compressor according to claim 3, wherein the upper bracket (301) is provided with a second separation surface (702) facing the motor assembly (2), the second separation surface (702) being located above the first separation surface (701), the second separation surface (702) and the gas outlet section (604) being located on the same side of the first separation surface (701), the first separation surface (701) being capable of letting part of the gas after passing the first separation surface (701) flow towards the second separation surface (702).

6. The scroll compressor of claim 5, further comprising a crankshaft passing through the discharge chamber (4), a balancing assembly (704) disposed within the discharge chamber (4) that follows the rotation of the crankshaft;

7. The scroll compressor according to claim 1, wherein the gas guide channel (6) further comprises a gas inlet section (603), the gas inlet being an inlet of the gas inlet section (603), a third separation surface (703) being provided between the gas inlet section (603) and the gas outlet section (604), a portion of the gas entering the gas inlet section (603) being capable of colliding with the third separation surface (703); a second air outlet (602) facing the motor assembly (2) is arranged between the third separating surface (703) and the air outlet section (604).

8. The scroll compressor of claim 7, wherein the flow area of the inlet is S1, the flow area of the first outlet (601) is S2, and the area of the second outlet (602) is S3, then:

S3＜0.5S1；S3＜S2。

9. the scroll compressor according to claim 7, wherein the inlet section (603) extends in a vertical direction, the third separation surface (703) has a planar structure, the separation surface is gradually inclined from top to bottom in a direction toward the outlet section (604), and an angle α between the inlet section (603) and the vertical direction is 10 ° < α < 60 °.

10. The scroll compressor according to claim 7, wherein the third separating surface (703) has a concave cambered surface structure, and an upper end of the third separating surface (703) is tangent to an inner wall surface of the intake section (603).

11. The scroll compressor according to claim 6, wherein the direction in which the gas outlet section (604) extends in the circumferential direction of the inner wall surface of the casing (1) coincides with the rotational direction of the crankshaft (4).

12. An air conditioner comprising the scroll compressor according to any one of claims 1 to 11.