Scroll compressor and air conditioner

Abstract

The application provides a scroll compressor and an air conditioner, which can solve the technical problem that gas blowing to a motor assembly causes lubricating oil to be unable to return to an oil pool in time in the prior art. The scroll compressor comprises a shell, an upper support and a motor assembly are arranged in the shell; the upper support is close to the top of the shell, and the motor assembly is away from the top of the shell; an exhaust cavity is formed between the upper support and the motor assembly, an exhaust port is arranged on the upper support and faces the exhaust cavity, a gas guide member is arranged in the exhaust cavity, the gas guide member is provided with a gas guide channel, the gas guide channel comprises an exhaust section, the gas guide channel comprises an air inlet and a first exhaust port, the air inlet is communicated with the exhaust port, the first exhaust port is the outlet of the exhaust section, and the exhaust section can make the gas discharged from the first exhaust port flow upwardly and obliquely.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of air conditioners, and particularly relates to a scroll compressor and an air conditioner. BACKGROUND

[0002] The compressor is the heart of the air conditioning system, and its performance is directly related to the energy efficiency ratio of the air conditioner. The scroll compressor belongs to a positive displacement compressor. The motor drives the crankshaft to rotate, and the orbiting scroll revolves around the fixed scroll under the drive of the crankshaft, so that the periodic change of the closed volume is realized, and the purpose of compressing the gas is achieved. During the compression and flow of the gas, the refrigerant and the lubricating oil will be mutually soluble in a certain proportion. When the compressor is exhausted, the lubricating oil will be discharged from the compressor together with the refrigerant, resulting in a decrease in the lubricating oil of the compressor. Meanwhile, too much refrigerant mixed with the lubricating oil will lead to a decrease in the heat exchange efficiency and a decrease in the energy efficiency. With the development of the scroll compressor towards large displacement and high speed, the matching system is also getting larger and larger, and the lubricating oil taken away per unit time is increasing, and the oil deficiency and the energy efficiency will be further deteriorated.

[0003] In order to solve the problem of oil-gas mixing during the operation of the scroll compressor, the compressor needs to be designed with an oil-gas separation device inside to reduce the oil content and improve the energy efficiency and reliability.

[0004] In the prior art, as shown in Figure 7 , the patent CN202120379135.9 increases an oil-gas guide part on the exhaust path of the compressor. The oil-gas guide part is connected with the shell, and a second exhaust passage and an oil return passage are formed between the outer surface of the oil-gas guide part and the inner wall surface of the shell. The inlet end of the second exhaust passage is in communication with the first exhaust passage, the outlet end of the second exhaust passage is in communication with the outlet end of the oil return passage, and the inlet end of the oil return passage is in communication with the cavity provided with the pump body assembly. Although the compressor structure reduces the oil discharge rate of the compressor, stabilizes the oil level of the oil pool inside the compressor, and ensures that the compressor operates more reliably and stably, when the compressor rotates at a high frequency, the lubricating oil on the upper end surface of the motor assembly will be blown up by the gas, causing the separated lubricating oil to mix with the refrigerant again, so that the lubricating oil in the oil pool is still insufficient, and the oil deficiency phenomenon occurs.

[0005] Another prior art, as shown in Figure 8 , the patent CN202011408197.4 increases an oil-gas guide part on the exhaust path of the compressor. The gas outlet of the flow guide passage is provided with an oil-gas separation assembly, which further separates the refrigeration oil in the gaseous refrigerant and reduces the oil discharge rate of the compressor. Although the patent achieves the effect of oil-gas separation, too much lubricating oil adheres to the separation assembly and cannot flow back to the oil pool in time, and the oil deficiency phenomenon still occurs. SUMMARY

[0006] Therefore, the application provides a scroll compressor and an air conditioner, which can solve the technical problem that gas blowing to the motor assembly causes lubricating oil to fail to return to the oil pool in time.

[0007] In one aspect, the application provides a scroll compressor, comprising a shell, an upper support and a motor assembly arranged inside the shell; the upper support is close to the top of the shell, and the motor assembly is away from the top of the shell; an exhaust cavity is formed between the upper support and the motor assembly, the upper support is provided with an exhaust port facing the exhaust cavity, and a gas guide member is arranged in the exhaust cavity; the gas guide member is provided with a gas guide channel, the gas guide channel comprises an outlet section, the gas guide channel comprises an inlet and a first outlet, the inlet is communicated with the exhaust port, the first outlet is the outlet of the outlet section, and the outlet section can make the gas discharged from the first outlet flow obliquely upward.

[0008] In some embodiments, the outlet section is a straight section, and the outlet section extends obliquely upward;

[0009] Or,

[0010] The outlet section is an arc section, and the included angle between the tangent line L passing through any point on the first outlet and the vertical direction is θ, 0°<θ<90°.

[0011] In some embodiments, the upper support comprises a reinforcing block protruding towards the motor assembly, and the reinforcing block is provided with a first separation surface;

[0012] When the outlet section is a straight section, the inner wall surface of the outlet section extends towards the direction of the first separation surface and can intersect the first separation surface;

[0013] When the outlet section is an arc section, the first outlet extends towards the direction of the first separation surface along the tangent line L and can intersect the first separation surface.

[0014] In some embodiments, the gas guide member is composed of sheet metal, the sheet metal abuts against the inner wall surface of the shell, and the gas guide channel is located between the sheet metal and the inner wall surface of the shell; the outlet section extends along the circumference of the shell and gradually inclines upward.

[0015] In some embodiments, the upper support is provided with a second separation surface facing the motor assembly, the second separation surface is located above the first separation surface, the second separation surface and the outlet section are located on the same side of the first separation surface, and the first separation surface can make part of the gas flow to the second separation surface after passing through the first separation surface.

[0016] In some embodiments, the scroll compressor further comprises a crankshaft passing through the exhaust cavity, and a balance assembly is arranged in the exhaust cavity and rotates with the crankshaft;

[0017] The second separation surface enables the gas passing through the second separation surface to flow downward through the rotating area of the balance assembly.

[0018] In some embodiments, the gas guide channel further comprises an air inlet section, the air inlet is the inlet of the air inlet section, a third separation surface is arranged between the air inlet section and the air outlet section, and the gas entering the air inlet section collides with the third separation surface; and a second air outlet is arranged between the third separation surface and the air outlet section and faces the motor assembly.

[0019] 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, and the following conditions are met:

[0020] S3 < 0.5S1; and S3 < S2.

[0021] In some embodiments, the air inlet section extends along a vertical direction, the third separation surface is a planar structure, the third separation surface gradually inclines downward from top to bottom towards the air outlet section, the angle between the extending direction of the third separation surface and the vertical direction is a, and 10° < a < 60°.

[0022] In some embodiments, the third separation surface is a concave arc surface structure, and the upper end of the third separation surface is tangent to the inner wall surface of the air inlet section.

[0023] In some embodiments, the air outlet section extends along the circumferential direction of the inner wall surface of the casing, and the extending direction of the air outlet section is consistent with the rotating direction of the crankshaft.

[0024] The application further provides an air conditioner comprising the scroll compressor.

[0025] The application enables the gas to be discharged obliquely upward from the first air outlet, avoids the gas directly blowing against the upper end surface of the motor assembly, and further avoids the lubricating oil on the upper end surface of the motor assembly being blown by the gas and then being re-entrained in the gas, so that the lubricating oil can be returned to the 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. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. The drawings in the following description are only exemplary, and other embodiments can be derived from the provided drawings without paying creative labor.

[0027] Figure 1 The first view schematic diagram of the scroll compressor of the embodiment of the present application;

[0028] Figure 2 The second view schematic diagram of the scroll compressor of the embodiment of the present application;

[0029] Figure 3 The structure schematic diagram of the gas guide of the embodiment of the present application;

[0030] Figure 4 The oblique view of the upper support of the embodiment of the present application;

[0031] Figure 5 The bottom view of the upper support of the embodiment of the present application;

[0032] Figure 6 The embodiment of the present application Figure 5 The enlarged view of A in the embodiment of the present application;

[0033] Figure 7 The first prior art;

[0034] Figure 8 The second prior art.

[0035] The reference signs are represented as:

[0036] 1, the casing; 101, the upper cover; 102, the lower cover; 2, the motor assembly; 301, the upper support; 3011, the reinforcing block; 302, the lower support; 303, the bearing; 304, the shaft shoulder; 3051, the exhaust port; 305, the flow guide groove; 4, the exhaust cavity; 5, the gas guide; 6, the gas guide channel; 601, the first gas outlet; 602, the second gas outlet; 603, the gas inlet section; 604, the gas outlet section; 701, the first separation surface; 702, the second separation surface; 703, the third separation surface; 704, the balance assembly; 801, the suction pipe; 802, the exhaust pipe; 9, the oil pool. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. The following description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0038] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0039] It should be understood that the term "and / or" as used herein merely describes associated objects, and can exist in three forms: A and / or B, A or B, and A and B. In addition, the character " / " in this document generally represents an "or" relationship between the front and rear associated objects.

[0040] The relative arrangement of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application, unless otherwise specifically stated. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are merely intended to facilitate the disclosure of the content disclosed in the specification, to enable those skilled in the art to understand and read, and are not intended to limit the defined conditions under which the present application can be implemented. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes that can be achieved by the present application, should still fall within the scope of the technology disclosed by the present application. The technology, methods and equipment known to those skilled in the relevant art may not be discussed in detail, but under appropriate circumstances, the technology, methods and equipment should be considered as part of the authorized specification. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0041] In the description of the present application, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and in the absence of the opposite indication, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component.

[0042] For purposes of the description hereinafter, spatially relative terms, such as "above", "below", "up", "down", "right", "left", "vertical", "horizontal", "top", "bottom", "lateral", "longitudinal", "transverse", "forward", "rearward", "radial", "peripheral" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device described herein is inverted or rotated 90 degrees, then an element described as "above" or "up" another element or feature would then be oriented "below" or "down" the other element or feature. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. The terms "first", "second", "third", etc. can be used herein to describe various elements, components, regions and / or sections. These designations are merely used for the convenience of description and are not intended to limit the scope of the present application unless otherwise expressly stated.

[0043] In addition, it should be noted that the use of "first", "second", and the like words of distinction do not have a special meaning and are merely used to distinguish between corresponding parts unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0044] The present application belongs to the technical field of air conditioners, and particularly relates to a scroll compressor and an air conditioner.

[0045] The compressor is the heart of the air conditioning system, and its performance is directly related to the energy efficiency ratio of the air conditioner. The scroll compressor belongs to a positive displacement compressor, and a motor drives a crankshaft to rotate. The orbiting scroll revolves around the fixed scroll under the drive of the crankshaft to realize the periodic change of the closed volume, so as to achieve the purpose of compressing the gas. During the compression and flow of the gas, the refrigerant and the lubricating oil will be mutually soluble in a certain proportion. When the compressor is exhausted, the lubricating oil will be discharged from the compressor together with the refrigerant, resulting in a decrease in the lubricating oil of the compressor. Meanwhile, too much refrigerant mixed with the lubricating oil will lead to a decrease in the heat exchange efficiency and a decrease in the energy efficiency. With the development of the scroll compressor towards large displacement and high speed, the matching system is also becoming larger and larger, and the lubricating oil taken away in unit time is increasing, which will further worsen the oil shortage and energy efficiency.

[0046] In order to solve the problem of oil-gas mixing during the operation of the scroll compressor, the compressor needs to be internally designed with an oil-gas separation device to reduce the oil content and improve the energy efficiency and reliability.

[0047] In the prior art, for example, Figure 7As shown, the patent CN202120379135.9 increases an oil-gas guide part on the compressor exhaust path, the oil-gas guide part is connected with the shell, a second exhaust passage and an oil return passage are formed between the outer surface of the oil-gas guide part and the inner wall surface of the shell, the inlet end of the second exhaust passage communicates with the first exhaust passage, the outlet end of the second exhaust passage communicates with the outlet end of the oil return passage, and the inlet end of the oil return passage communicates with the cavity provided with the pump body assembly. Although the compressor structure reduces the oil discharge rate of the compressor, stabilizes the oil level of the oil pool in the compressor, and ensures that the compressor runs more reliably and stably, when the compressor rotates at high frequency, the gas will blow up the lubricating oil on the upper end surface of the motor assembly, causing the separated lubricating oil to mix into the refrigerant again, so that the lubricating oil in the oil pool is still insufficient, and the oil shortage phenomenon occurs.

[0048] Another prior art, such as Figure 8 As shown, the patent CN202011408197.4 increases an oil-gas guide part on the compressor exhaust path, wherein the gas outlet of the flow guide passage is provided with an oil-gas separation assembly, which further separates the refrigerant oil in the gaseous refrigerant and reduces the oil discharge rate of the compressor exhaust; although the patent achieves the effect of oil-gas separation, too much lubricating oil adheres to the separation assembly and cannot flow back to the oil pool in time, and the oil shortage phenomenon still occurs.

[0049] Therefore, the present application provides a scroll compressor, as shown in Figures 1-6 The shell 1 is provided with an upper support 301 and a motor assembly 2 inside the shell 1; the upper support 301 is close to the top of the shell 1, and the motor assembly 2 is away from the top of the shell 1; an exhaust cavity 4 is formed between the upper support 301 and the motor assembly 2, and an exhaust port 3051 is provided on the upper support 301 and faces the exhaust cavity 4, characterized in that a gas guide piece 5 is arranged in the exhaust cavity 4, the gas guide piece 5 is provided with a gas guide passage 6, the gas guide passage 6 includes an outlet section 604, the gas guide passage 6 includes an inlet and a first gas outlet 601, the inlet communicates with the exhaust port 3051, the first gas outlet 601 is the outlet of the outlet section 604, and the outlet section 604 can make the gas discharged from the first gas outlet 601 flow obliquely upward.

[0050] In the present application, "up" and "down" are the positions when the scroll compressor is vertically arranged, that is, the crankshaft of the scroll compressor is in the vertical direction.

[0051] The gas discharged from the exhaust port 3051 is high-pressure gas (high-pressure oil-gas mixture), and the high-pressure gas flows out of the exhaust port 3051 at a high speed; the high-pressure gas discharged downward from the exhaust port 3051 is changed in direction by the gas outlet section 604 of the gas guide member 5 and then discharged obliquely upward through the first gas outlet 601, thereby avoiding that the rapidly flowing gas directly blows against the upper end surface of the motor assembly 2 to blow up the lubricating oil on the upper end surface of the motor assembly 2 and mix the lubricating oil into the gas, which reduces the lubricating oil flowing back to the oil pool 9; and further ensuring that there is enough lubricating oil flowing back to the oil pool 9 to avoid the lack of oil in the compressor. Especially when the compressor is operated at a high frequency, the gas discharged from the compressor is larger in gas amount, and the gas flows out of the exhaust port 3051 at a higher speed. If the gas directly blows against the upper end surface of the motor assembly 2 at this time, more lubricating oil will be blown up, which will cause a serious lack of oil in the oil pool 9.

[0052] The flow process of the refrigerant (the gas is refrigerant when scroll compression is applied to a refrigeration system) is as follows: the refrigerant gas after heat exchange from the system enters the suction pipe 801 of the compressor, the refrigerant gas enters the interior of the static scroll plate of the pump body to be compressed, and at the same time, the refrigerant gas is mixed and dissolved with the lubricating oil in the pump body during the compression process. The compressed refrigerant gas changes from low-pressure gas to high-pressure oil-gas mixture; the high-pressure oil-gas mixture first enters the high-pressure cavity above the static plate, and then is discharged downward (i.e. discharged from the exhaust port 3051) from the flow guide groove 305 outside the circle of the static plate and the upper support 301 and enters the gas guide channel 6.

[0053] The scroll compressor mainly realizes the oil separation purpose by changing the flow direction or flow speed of the oil-gas mixture discharged from the pump body. The specific method is to increase the oil blocking cap or the exhaust guide plate on the shaft system. As the displacement of the scroll compressor becomes larger and larger and the rotating speed becomes higher and higher, the separated oil liquid cannot quickly and timely pass through the motor to the bottom oil pool 9, so that the lubricating oil accumulates on the upper end surface of the motor assembly 2. At this time, if the gas directly blows against the upper end surface of the motor assembly 2, the gas will be secondarily mixed with the oil liquid, which will cause the oil circulation rate of the scroll compressor to be too high, the oil amount in the oil pool 9 to be insufficient, and the oil circulation rate of the air conditioning system to be increased, thereby causing the heat exchange effect of the air conditioning heat exchanger to be reduced, the actual capacity of the air conditioner to be reduced, the internal state of the compressor to be in the oil-free (lack of oil) state, and the reliability of the compressor to be reduced. The increase in the oil circulation rate means that the suction volume of the compressor will be partially replaced by the refrigerating machine oil, which reduces the refrigerating capacity of the compressor. In severe cases, the refrigerating machine oil sucked in will also cause the scroll plate of the compressor to be broken, which directly causes the scroll compressor to fail.

[0054] Preferably, the gas outlet section 604 is a straight section, and the gas outlet section 604 extends obliquely upward;

[0055] Or,

[0056] The air outlet section 604 is an arc-shaped section, and the angle between the tangent L passing through any point on the first air outlet 601 and the vertical direction is θ, where 0° < θ < 90°.

[0057] When the outlet section 604 is a straight section, it is beneficial to increase the speed of the gas when it is discharged from the first outlet 601, but the gas flow noise is relatively large. When the outlet section 604 is an arc-shaped section, the gas flows in the outlet section 604 and has a large force with the inner wall surface of the outlet section 604. This force can separate the lubricating oil in the gas, which is beneficial to improving the oil-gas separation efficiency. At the same time, the arc-shaped outlet section 604 has a noise blocking effect and can reduce the transmission of noise.

[0058] Preferred, such as Figures 1-2 As shown, the upper support 301 includes a reinforcing block 3011 protruding toward the motor assembly 2, and the reinforcing block 3011 is 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 toward the first separation surface 701 and can intersect with the first separation surface 701.

[0059] When the air outlet section 604 is an arc-shaped section, the first air outlet 601 extends along the tangent L toward the first separation surface 701 and can intersect with the first separation surface 701.

[0060] Most of the gas discharged from the first gas outlet 601 flows to the first separation surface 701. The gas collides with the first separation surface 701 to separate the oil and gas, reducing the content of lubricating oil in the gas. The separated lubricating oil flows back to the oil pool to avoid oil shortage in the oil pool.

[0061] The reinforcing block 3011 is attached to the inner wall of the housing 1 and fixedly connected to the housing 1. The existing function of the reinforcing block 3011 is to strengthen the firmness between the upper support 301 and the housing 1. A first separation surface 701 is provided on the existing reinforcing block 3011, opposite to the first air outlet 601, and a gap is formed between the first separation surface 701 and the first air outlet 601. After the mixed gas is blown out from the first air outlet 601, it collides with the first separation surface 701. During the collision, the lubricating oil contained in the mixed gas separates from the gas and adheres to the first separation surface 701. The lubricating oil adhering to the first separation surface 701 flows downward to the upper end face of the motor assembly 2 under the action of gravity. In this way, the mixed gas is separated into oil and gas, improving the purity of the gas and increasing the amount of lubricating oil returning to the oil sump 9, thus avoiding oil shortage in the scroll compressor.

[0062] The reinforcing block 3011 opposite to the first air outlet 601 can be extended so that the gas discharged from the first air outlet 601 collides with the first separation surface 701 on the reinforcing block 301 as much as possible, thereby improving the oil-gas separation efficiency.

[0063] When the first separation surface 701 is a plane, the 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, the obtuse angle is towards the middle of the casing 1, and thus the gas can flow towards the middle of the casing 1 (in 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 upwards when flowing out of the first gas outlet 601, the gas continues to flow upwards after passing through the first separation surface 701 in the vertical state.

[0064] Preferably, as shown in the drawings, the gas guide member 5 is composed of sheet metal, the sheet metal abuts against the inner wall surface of the casing 1, and the gas guide channel 6 is located between the sheet metal and the inner wall surface of the casing 1; the gas outlet section 604 extends along the circumference of the casing 1 body and gradually inclines upwards. Figures 1-2 The sheet metal is welded together with the casing 1, the gas guide channel 6 extends along the inner wall surface of the casing 1, which reduces the occupation of the space of the exhaust cavity 4, simplifies the structure of the gas guide member 5, and is conducive to reducing the cost. The gas guide channel 6 abuts against the inner wall surface of the casing 1, so that the gas can move along the inner wall surface of the casing 1 after being discharged from the first gas outlet 601, and thus the gas can flow to the first separation surface 701 along the inner wall surface of the casing 1, the inner wall surface of the casing 1 has a certain limitation on the gas flow, and thus as many gases as possible collide with the first separation surface 701, and the oil-gas separation efficiency is improved.

[0065] The inlet of the gas guide channel 6 completely covers the exhaust port 3051, so that the gas discharged from the exhaust port 3051 completely enters the gas guide channel 6.

[0066] Preferably, as shown in the drawings, the upper support 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 gas outlet section 604 are located on the same side of the first separation surface 701, and the first separation surface 701 can make part of the gas flow to the second separation surface 702 after passing through the first separation surface 701.

[0067] Figure 4 The reason why the first separation surface 701 can make the gas flow to the second separation surface 702 after passing through the first separation surface 701 is that the angle of the first separation surface 701 makes the gas flow to the second separation surface 702 after being reflected and guided by the first separation surface 701. As shown in the drawings, the first separation surface 701 is a plane, and the 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, the obtuse angle is towards the middle of the casing 1, and thus the gas can flow towards the middle of the casing 1 (in 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 upwards when flowing out of the first gas outlet 601, the gas continues to flow upwards after passing through the first separation surface 701 in the vertical state.

[0068] The reason why the first separation surface 701 can make the gas flow to the second separation surface 702 after passing through the first separation surface 701 is that the angle of the first separation surface 701 makes the gas flow to the second separation surface 702 after being reflected and guided by the first separation surface 701. As shown in the drawings, the first separation surface 701 is a plane, and the 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, the obtuse angle is towards the middle of the casing 1, and thus the gas can flow towards the middle of the casing 1 (in 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 upwards when flowing out of the first gas outlet 601, the gas continues to flow upwards after passing through the first separation surface 701 in the vertical state. Figure 6 ​As shown, the angle γ between the gas and the first separation surface 701 is an acute angle, so that the gas can flow towards the center of the crankshaft; since the gas flows upward after being discharged from the first gas outlet 601, the 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 and towards the direction of the crankshaft, so that the gas can flow to the second separation surface 702.

[0069] It should be noted that the fluid flow is relatively complex, and the flow direction mentioned herein is the main flow direction of the gas, and it is not required that all the gas flows according to the design.

[0070] The mixed gas after oil-gas separation by the first separation surface 701 flows towards the second separation surface 702 and collides with the second separation surface 702, and when colliding with the second separation surface 702, the mixed gas is separated 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 after separation by the second separation surface 702 contains less lubricating oil, and more lubricating oil can flow back to the oil pool 9, thereby avoiding the oil shortage phenomenon of the scroll compressor.

[0071] Preferably, as Figure 1 As shown, the crankshaft is provided with a balance assembly 704 located below the second separation surface 702, and the balance assembly 704 is located in the exhaust cavity 4 and rotates with the crankshaft.

[0072] The second separation surface 702 can make part of the gas passing through the second separation surface 702 flow downward through the rotating area of the balance assembly 704.

[0073] The reason why the second separation surface 702 can make the gas flow towards the balance assembly 704 is the same as that of the first separation surface 701; when the second separation surface 702 is a plane, the angle between the gas and the second separation surface 702 can make the gas flow downward to the rotating area of the balance assembly 704.

[0074] The rotating area of the balance assembly 704 is the area through which the balance assembly 704 (generally including a balance block and a balance cover) fixed on the crankshaft rotates with the crankshaft. The rotating area of the crankshaft includes the area between the reinforcing block 3011 and the shaft shoulder 304.

[0075] The gas passes through the second separation surface 702, enters the rotating area of the balancing assembly 704, and performs circular motion under the driving of the rotation of the balancing assembly 704. Part of the lubricating oil in the mixed gas adheres to the balancing assembly 704, and part of the lubricating oil moves to the outer edge under the action of centrifugal force and adheres to the inner wall of the casing 1. The lubricating oil adhering to the balancing assembly 704 and the inner wall of the casing 1 flows downward to the upper end surface of the motor assembly 2 under the action of gravity. Through the above arrangement, oil-gas separation is further performed on the mixed gas, the mixed lubricating oil in the mixed gas is reduced, the lubricating oil that can flow into the oil pool 9 is correspondingly increased, the oil shortage of the oil pool 9 is avoided, the oil shortage of the scroll compressor is avoided, and the performance of the scroll compressor is improved.

[0076] Preferably, as shown in the figure, the gas guide channel 6 further comprises an air inlet section 603, the air inlet is the inlet of the air inlet section 603, a third separation surface 703 is arranged between the air inlet section 603 and the air outlet section 604, and part of the gas entering the air inlet section 603 can collide with the third separation surface 703; the second air outlet 602 is arranged between the third separation surface 703 and the air outlet section 604 and faces the motor assembly 2. Figure 3 The mixed gas entering the gas guide channel 6 collides with the third separation surface 703 to separate the lubricating oil in the mixed gas. The separated lubricating oil flows to the second air outlet 602 under the action of gravity and the flow of the mixed gas. The lubricating oil and part of the mixed gas flow out of the second air outlet 602 and then flow to the upper end surface of the motor assembly 2. Through the above arrangement, the mixed gas is subjected to oil-gas separation once, the separated lubricating oil can be discharged from the second air outlet 602 in time, and the performance of the scroll compressor is improved.

[0077] The second air outlet 602 can be provided in multiple numbers, and the multiple second air outlets 602 all face downward.

[0078] The air inlet section 603 is in a vertical direction, and the air outlet section 604 is arranged obliquely. The included angle between the air outlet section 604 and the air inlet section 603 is β, and 0°<β<90°.

[0079] 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:

[0080] S3<0.5S1; S3<S2.

[0081]

[0082] ​By the above arrangement, the gas entering the gas guide channel 6 mainly enters the gas outlet section 604, and less gas can flow out of the second gas outlet 602. Since the second gas outlet 602 directly leads downward to the upper end surface of the motor assembly 2, the gas directly blowing toward the upper end surface of the motor assembly 2 through the second gas outlet 602 can be reduced, thereby reducing the disturbance to the lubricating oil on the upper end surface of the motor assembly 2, and facilitating the lubricating oil on the upper end surface of the motor assembly 2 to flow downward into the oil pool 9 as soon as possible. That is, the gas entering the gas guide channel 6 mainly enters the gas outlet section 604, and the gas flowing out of the first gas outlet 601 does not affect the lubricating oil on the upper end surface of the motor assembly 2. Thus, when the rotational speed of the scroll compressor is high, the influence on the return flow of the lubricating oil is reduced accordingly due to the small amount of gas flowing out of the second gas outlet 602, thereby avoiding the lubricating oil shortage in the oil pool 9.

[0083] Preferably, as shown in FIG. 7, the gas inlet section 603 extends along the vertical direction, and the third separation surface 703 is a planar structure. The third separation surface gradually inclines downward from top to bottom toward the direction of the gas outlet section 604. The angle between the extension direction of the third separation surface 703 and the vertical direction is α, and 10° < α < 60°. Figure 3

[0084] The third separation surface 703 is a separation plane, which can improve the intensity of the collision between the gas and the third separation surface 703, and improve the oil-gas separation efficiency. By setting 10° < α < 60°, the gas can flow toward the gas outlet section 604 after being reflected by the separation plane, the amount of gas flowing out of the second gas outlet 602 is reduced, the gas amount 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 improved, and the intensity of the collision between the gas and the first separation surface 701 after the gas flowing out of the second gas outlet 602 is ensured, thereby improving the oil-gas separation efficiency when the mixed gas collides with the first separation surface 701.

[0085] 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 gas inlet section 603.

[0086] The third separation surface 703 is a separation concave arc surface, which reduces the intensity of the collision between the mixed gas and the third separation surface 703, reduces the kinetic energy loss when the mixed gas collides with the third separation surface 703, improves the speed of the gas entering the gas outlet section 604, and ensures the oil-gas separation efficiency when the mixed gas flows out of the gas outlet section 604 and collides with the first separation surface 701.

[0087] Preferably, the extension direction of the gas outlet section 604 along the circumferential direction of the inner wall surface of the housing 1 is consistent with the rotation direction of the crankshaft.

[0088] ​It should be noted that, in the present application, the direction in which the outlet section 604 extends along the inner wall surface of the casing 1 is consistent with the rotation direction of the crankshaft, which means that, as viewed from the axial direction of the crankshaft, the extension direction of the outlet section 604 is consistent with the rotation direction of the crankshaft; in this way, the circumferential direction of the gas flowing out of the outlet section 604 is consistent with the rotation direction of the crankshaft. For example, as viewed from top to bottom along the axial direction of the crankshaft: the rotation direction of the crankshaft is clockwise, and the gas flowing out of the outlet section 604 is also clockwise.

[0089] The gas flows upward along the inner wall surface of the casing 1, and also flows circumferentially along the inner wall surface of the casing 1; the direction in which the outlet section 604 extends circumferentially along the inner wall surface of the casing 1 is consistent with the rotation direction of the crankshaft, so that the circumferential flow direction of the gas along the inner wall surface of the casing 1 is consistent with the rotation direction of the crankshaft, so that the rotation of the crankshaft (including the balance assembly 704 arranged on the crankshaft) can make the gas in the exhaust cavity 4 move faster in a circular motion, thereby improving the oil-gas separation efficiency; accordingly, the stability of the gas movement is ensured, the generation of turbulent flow is prevented, the flow resistance loss is greatly increased, the power is increased, and the oil-gas separation efficiency is improved.

[0090] The present application also provides an air conditioner comprising the scroll compressor.

[0091] The scroll compressor is vertically arranged in the outdoor unit of the air conditioner, the casing 1 comprises an upper cover 101 and a lower cover 102, the upper cover 101 is provided with a suction pipe 801, the lower cover 102 constitutes the bottom of the casing 1, the oil pool 9 is arranged above the lower cover 102 between the lower cover 102 and the lower bracket 302, and the upper bracket 301 is provided with a bearing 303 and a shaft shoulder 304.

[0092] The refrigerant flow process of the air conditioner in operation is as follows: the refrigerant gas after heat exchange from the system enters the suction pipe 801 of the scroll compressor, the refrigerant gas enters the interior of the static scroll plate of the pump body for compression, and at the same time, the refrigerant gas is mixed and dissolved with the lubricating oil in the pump body during the compression process, the compressed refrigerant gas changes from low-pressure gas into high-pressure oil-gas mixture; the high-pressure oil-gas mixture enters the high-pressure cavity above the static plate from the high-pressure outlet of the static plate, and then is discharged downward into the gas guide channel 6 from the guide groove 305 (the exhaust port 3051 is the outlet of the guide groove 305 facing the exhaust cavity 4) outside the outer circle of the static plate and the upper support 301, the refrigerant (mixed with lubricating oil, referred to as refrigerant hereinafter) flows downward along the inlet section 603 of the gas guide channel 6, part of the refrigerant collides with the third separation surface 703, and during the collision with the third separation surface 703, the refrigerant completes the first oil-gas separation, part of the lubricating oil adheres to the third separation surface 703 and flows into the second gas outlet 602 under the action of gravity and the flow of the refrigerant, and a small amount of refrigerant flowing out of the second gas outlet 602 accelerates the downward flow of the refrigerant in the second gas outlet 602; more refrigerant enters the outlet section 604 and flows obliquely upward along the outlet section 604, and since the gas guide channel 6 extends obliquely upward along the circumferential surface of the inner wall of the shell 1, the refrigerant also moves upward along the circumferential surface of the inner wall of the shell 1 in the gas guide channel 6; after the refrigerant flows out of the first gas outlet 601, it collides with the first separation surface 701, and the collision with the first separation surface 701 completes the second oil-gas separation, the lubricating oil adheres to the first separation surface 701 and moves downward under the action of gravity; due to the design of the first separation surface 701, the refrigerant colliding with the first separation surface 701 moves upward while moving toward the crankshaft (i.e., toward the center), and the refrigerant collides with the second separation surface 702 again, and the collision with the second separation surface 702 completes the third oil-gas separation, the lubricating oil adheres to the second separation surface 702 and moves downward under the action of gravity; due to the design of the second separation surface 702, the refrigerant mainly moves downward after passing through the second separation surface 702, and a small part of the refrigerant reflects off the shaft shoulder 304 and the bearing 303 and then moves downward, the refrigerant moving downward enters the rotating area of the balance assembly 704 (including a balance cover and a balance block), the crankshaft drives the balance assembly 704 to rotate, the rotation of the balance assembly 704 drives the refrigerant entering the rotating area to move in a circular motion, and in the circular motion, the lubricating oil in the refrigerant is separated out under the action of centrifugal force and adheres to the inner wall of the balance assembly 704 and the shell 1, the rotation of the balance assembly 704 is the fourth oil-gas separation, and the separated lubricating oil flows downward under the action of gravity on the lubricating oil adhering to the inner wall of the balance assembly 704 and the shell 1; the refrigerant after the fourth oil-gas separation is discharged from the exhaust pipe 802. All the lubricating oil flowing downward finally flows to the upper end surface of the motor assembly 2 and then flows downward into the oil pool 9 from the oil path between the motor stator and the inner wall of the shell 1.The refrigerant sequentially performs first oil-gas separation, second oil-gas separation, third oil-gas separation and fourth oil-gas separation from entering the guide channel to flowing out from the exhaust pipe 802, so as to improve the oil-gas separation efficiency as much as possible. The separated lubricating oil flows back to the oil pool 9, avoiding the oil pool 9 from being out of oil. The first separation surface 701 and the second separation surface 702 not only separate the refrigerant from oil and gas, but also change the flow direction of the refrigerant, so that the refrigerant changes from flowing obliquely upward to flowing downward and enters the rotating area of the balance assembly 704, and then the refrigerant can complete the fourth oil-gas separation. When the refrigerant flows out from the outlet section 604, it flows obliquely upward to avoid directly blowing to the upper end surface of the motor assembly 2, and then to avoid the refrigerant blowing the lubricating oil on the upper end surface of the motor assembly 2 again, so as to avoid the lubricating oil being rolled into the refrigerant and causing the oil pool 9 to be out of oil.

[0093] Those skilled in the art will readily understand that the advantageous technical features of the above-mentioned modes can be freely combined and superimposed without conflict.

[0094] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application. The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A scroll compressor comprising a casing (1), an upper support (301) and a motor assembly (2) are arranged inside the casing (1); the upper support (301) is close to the top of the casing (1), and the motor assembly (2) is away from the top of the casing (1); an exhaust cavity (4) is formed between the upper support (301) and the motor assembly (2), and an exhaust port (3051) is arranged on the upper support (301) and faces the exhaust cavity (4), characterized in that, The exhaust cavity (4) is provided with a gas guide member (5), the gas guide member (5) is provided with a gas guide channel (6), the gas guide channel (6) comprises an outlet section (604), the gas 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 the outlet of the outlet section (604), and the outlet section (604) can make the gas discharged from the first air outlet (601) flow obliquely upward.

2. The scroll compressor of claim 1, wherein The outlet section (604) is a straight section, and the outlet section (604) extends obliquely upward. Or, The outlet section (604) is an arc section, an included angle between a tangent line L passing through any point on the first air outlet (601) and a vertical direction is θ, and 0°<θ<90°.

3. The scroll compressor of claim 2, wherein, The upper support (301) comprises a reinforcing block (3011) protruding towards the motor assembly (2), and the reinforcing block (3011) is provided with a first separation surface (701); When the outlet section (604) is a straight section, the inner wall surface of the outlet section (604) extends towards the direction of the first separation surface (701) and can intersect the first separation surface (701); When the outlet section (604) is an arc section, the first air outlet (601) extends towards the direction of the first separation surface (701) along the tangent line L and can intersect the first separation surface (701).

4. The scroll compressor of claim 3, wherein The gas guide member (5) is composed of sheet metal, the sheet metal abuts against the inner wall surface of the machine shell (1), and the gas guide channel (6) is located between the sheet metal and the inner wall surface of the machine shell (1); the outlet section (604) extends along the circumference of the machine shell (1) and gradually inclines upward.

5. The scroll compressor of claim 3, wherein The upper support (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 outlet section (604) are located on the same side of the first separation surface (701), and the first separation surface (701) can make part of the gas flow to the second separation surface (702) after passing through the first separation surface (701).

6. The scroll compressor of claim 5, wherein, The scroll compressor further comprises a crankshaft penetrating through the exhaust cavity (4), and the exhaust cavity (4) is provided with a balance assembly (704) rotating with the crankshaft; The second separation surface (702) can make part of the gas flow downward through the rotating area of the balance assembly (704) after passing through the second separation surface (702).

7. The scroll compressor of claim 1, wherein The gas guide channel (6) further comprises an inlet section (603), the air inlet is the inlet of the inlet section (603), a third separation surface (703) is arranged between the inlet section (603) and the outlet section (604), part of the gas entering the inlet section (603) can collide with the third separation surface (703), and a second air outlet (602) facing the motor assembly (2) is arranged between the third separation surface (703) and the outlet section (604).

8. The scroll compressor of claim 7, wherein, 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, and then: S3 < 0.5S1; S3 < S2.

9. The scroll compressor of claim 7, wherein, The air inlet section (603) extends along a vertical direction, the third separation surface (703) is a plane structure, the third separation surface (703) gradually inclines toward the direction of the air outlet section (604) from top to bottom, the angle between the extending direction of the third separation surface (703) and the vertical direction is α, and 10° < α < 60°.

10. The scroll compressor of claim 7, wherein, 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).

11. The scroll compressor of claim 6, wherein, The extending direction of the air outlet section (604) along the circumferential direction of the inner wall surface of the shell (1) is consistent with the rotating direction of the crankshaft.

12. An air conditioner characterized by comprising: The scroll compressor comprises the scroll compressor according to any one of claims 1-11.

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