Scroll compressor

Abstract

A scroll compressor, comprising an outer shell (1), an inner shell (2), a motor (3), and a scroll assembly (4). The outer shell (1) is provided with a gas inlet (11); the inner shell (2) is arranged inside the outer shell (1); the motor (3) is arranged inside the inner shell (2) and comprises a stator (31) and a rotor (32) arranged in the stator (31); the scroll assembly (4) is provided therein with a compression chamber (41) for compressing a refrigerant gas and is configured to be controlled by the motor (3) to compress the refrigerant gas; a gas outlet gap (23) is formed between the stator (31) and the rotor (32) and / or between the stator (31) and the inner shell (2), the region between the scroll assembly (4) and the motor (3) in the inner shell (2) being an upper chamber (21), and upper gas inlet holes (24) being formed in the upper chamber (21). The temperature of the refrigerant gas entering through the gas inlet (11) is lower than the temperature of the motor (3), and the refrigerant gas entering through the gas inlet (11) is configured to partially enter the compression chamber (41) through the upper gas inlet holes (24) and partially enter the compression chamber (41) through the gas outlet gap (23), thereby absorbing heat of the motor (3). The scroll compressor has a simple gas guiding structure such that the manufacturing difficulty is low and the manufacturing cost is relatively low.

Description

scroll compressor

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 28, 2023, with application number 202311278617.5 and invention name “Scroll Compressor”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the field of refrigeration equipment, and in particular to a scroll compressor. Background Art

[0003] Scroll compressors are widely used in refrigeration, air conditioning, heat pumps and other fields due to their high efficiency, small size, light weight and smooth operation.

[0004] Specifically, the main structure of a scroll compressor consists of a scroll assembly that compresses the refrigerant and a motor that drives the compression mechanism. During operation, the motor generates a large amount of heat, which needs to be removed by the drawn-in refrigerant, thereby reducing the motor's temperature and extending its lifespan.

[0005] The motor's lower coil is more difficult to cool due to its distance from the air intake. One existing technique involves forcing the entire airflow into the lower cooling coil, then returning to the upper coil through the air gap between the motor's stator and rotor, and finally into the compression chamber. However, due to the small cross-sectional area of ​​the air gap between the motor's stator and rotor and the stator's trimmed edge, refrigerant vapor experiences significant power loss when passing through these smaller cross-sectional areas, increasing the scroll compressor's suction resistance and reducing its energy efficiency.

[0006] Another approach involves forcing some or all of the air into the motor's lower coil, where it is then diverted through piping to bypass the air gap and rejoin the upper coil. This solution offers good motor cooling, but is difficult and expensive to manufacture.

[0007] Summary of the Invention

[0008] In order to solve the problems existing in the prior art, the present disclosure provides a scroll compressor.

[0009] According to a first aspect of the present disclosure, there is provided a scroll compressor comprising:

[0010] a housing, wherein the housing is provided with an air inlet;

[0011] an inner shell, the inner shell being disposed in the outer shell;

[0012] a motor disposed in the inner housing and comprising a stator and a rotor disposed in the stator;

[0013] a scroll assembly having a compression chamber formed therein for compressing refrigerant gas and configured to be controlled by the motor to compress the refrigerant gas;

[0014] In which, an air outlet gap is provided between the stator and the rotor and / or between the stator and the inner shell, the area between the motor and the scroll assembly in the inner shell is an upper chamber, and an upper air inlet is provided on the upper chamber; the temperature of the refrigerant gas entering from the air inlet is lower than the temperature of the motor, and the refrigerant gas entering from the air inlet is configured to enter the compression chamber partially from the upper air inlet and enter the compression chamber partially from the air outlet gap to absorb heat from the motor.

[0015] In one embodiment of the present disclosure, the area of ​​the motor in the inner shell on the side away from the vortex assembly is a lower chamber, and a lower air vent is opened on the lower chamber, and the lower air vent includes a lower air inlet and a lower air outlet, and the refrigerant gas entering from the air inlet is configured to at least partially enter the lower air inlet; the lower air outlet is connected to the upper air inlet through the gap between the inner shell and the outer shell.

[0016] In one embodiment of the present disclosure, the motor further includes an upper wire package and a lower wire package, the upper wire package is located in the upper chamber, and the lower wire package is located in the lower chamber, the refrigerant gas in the upper chamber is configured to cool the upper wire package, the refrigerant gas in the upper chamber includes refrigerant gas entering the upper chamber from the air inlet through the lower chamber and the air outlet gap, refrigerant gas entering the upper chamber from the air inlet through the upper air inlet hole, and refrigerant gas entering the upper chamber from the air inlet through the lower chamber, the lower air vent and the upper air inlet hole, the refrigerant gas in the lower chamber is configured to cool the lower wire package.

[0017] In one embodiment of the present disclosure, an air guide portion is further included. The air guide portion is arranged on the inner shell or the outer shell, and one end of the air guide portion is connected to the lower air inlet hole, and the opening of the other end is opposite to the outlet of the air inlet.

[0018] In one embodiment of the present disclosure, the air guide portion is provided on the inner shell, the inlet of the air guide portion is opposite to the opening of the outer shell, and the distance between the outer contour of the air guide portion and the inner side surface of the outer shell is 2 to 15 mm.

[0019] In one embodiment of the present disclosure, the refrigerant gas entering from the air inlet is configured to enter the lower air inlet hole entirely.

[0020] In one embodiment of the present disclosure, an air guide portion is further included, and the air guide portion is configured to be connected to the air inlet and the lower air inlet hole at both ends respectively.

[0021] In one embodiment of the present disclosure, the area of ​​each of the upper air inlet holes is configured to be smaller than the sum of the areas of the lower air outlet holes.

[0022] In one embodiment of the present disclosure, the number of the upper air inlet holes is greater than the number of the lower air outlet holes, and the area of ​​each upper air inlet hole is smaller than the area of ​​the lower air outlet hole.

[0023] In one embodiment of the present disclosure, the upper air inlet holes and the lower air vent holes are configured to be evenly distributed in the circumferential direction of the inner shell.

[0024] During the operation of the scroll compressor disclosed herein, the refrigerant gas will enter the outer shell from the air inlet, and then part of the refrigerant gas will enter the upper chamber from the upper air inlet hole, and part of the refrigerant gas will enter the upper chamber from the steam outlet gap, and then the refrigerant gas in the upper chamber will enter the compression chamber of the scroll assembly, be compressed, and then be discharged from the scroll compressor.

[0025] Among them, since the air outlet gap is located between the stator and the rotor and / or between the stator and the inner shell, and the temperature of the refrigerant gas is lower than the temperature of the motor, the refrigerant gas can cool the motor when passing through the air outlet gap, thereby effectively dissipating the heat from the motor, reducing the temperature of the motor, and thus extending the service life of the motor.

[0026] Moreover, since only a part of the refrigerant gas passes through the steam outlet gap, the rest of the refrigerant gas enters the upper chamber from between the upper air inlet holes on the upper chamber. In this way, the amount of refrigerant gas passing through the steam outlet gap is relatively small, which can achieve the effect of cooling the motor without causing a large power loss. It can achieve a balance between cooling the motor and reducing the suction loss, thereby effectively improving the energy efficiency of the compressor and improving the user experience.

[0027] Moreover, compared with the prior art, the scroll compressor disclosed in the present invention has a simple air guide structure, is easy to manufacture, and has a relatively low processing cost.

[0028] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0030] FIG1 is a perspective schematic diagram of a scroll compressor provided by an embodiment of the present disclosure;

[0031] FIG2 is a cross-sectional schematic diagram of a scroll compressor provided by an embodiment of the present disclosure;

[0032] FIG3 is a partial perspective schematic diagram of a scroll compressor provided by an embodiment of the present disclosure with part of the outer shell removed;

[0033] FIG4 is a partial perspective schematic diagram of a scroll compressor provided by an embodiment of the present disclosure with parts of the outer shell and inner shell removed;

[0034] FIG5 is a schematic diagram of the flow of refrigerant gas in the scroll compressor provided in an embodiment of the present disclosure.

[0035] The one-to-one correspondence between the names of the components and the reference numerals in Figures 1 to 5 is as follows: 1. Outer shell; 11. Air inlet; 12. Air outlet; 2. Inner shell; 21. Upper chamber; 22. Lower chamber; 23. Air outlet gap; 24. Upper air inlet; 25. Lower air vent; 251. Lower air inlet; 252. Lower air outlet; 26. Air guide part; 3. Motor; 31. Stator; 32. Rotor; 33. Upper wire package; 34. Lower wire package; 35. Rotating shaft; 4. Scroll assembly; 41. Compression chamber; 42. Moving scroll; 43. Stationary scroll; 5. Frame. DETAILED DESCRIPTION

[0036] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, 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 disclosure.

[0037] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0038] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0039] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0040] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0041] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0042] In this article, "first", "second", etc. are only used to distinguish each other, and do not indicate the importance and order, or the prerequisite for each other's existence.

[0043] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0044] Unless otherwise stated, numerical ranges herein include not only the entire range between its two endpoints but also the several sub-ranges contained therein.

[0045] The present disclosure provides a scroll compressor, which includes at least an outer shell, an inner shell, a motor, and a scroll assembly; wherein the outer shell is provided with an air inlet; the inner shell is provided in the outer shell; the motor is provided in the inner shell and includes a stator and a rotor provided in the stator; a compression chamber for compressing refrigerant gas is formed in the scroll assembly, and is configured to be controlled by the motor to compress the refrigerant gas;

[0046] In which, an air outlet gap is provided between the stator and the rotor and / or between the stator and the inner shell, the area between the motor and the scroll assembly in the inner shell is the upper chamber, and an upper air inlet is provided on the upper chamber; the temperature of the refrigerant gas entering from the air inlet is lower than the temperature of the motor, and the refrigerant gas entering from the air inlet is configured to enter the compression chamber partially from the upper air inlet and enter the compression chamber partially from the air outlet gap to absorb heat from the motor.

[0047] During the operation of the scroll compressor disclosed herein, the refrigerant gas will enter the outer shell from the air inlet, and then part of the refrigerant gas will enter the upper chamber from the upper air inlet hole, and part of the refrigerant gas will enter the upper chamber from the steam outlet gap, and then the refrigerant gas in the upper chamber will enter the compression chamber of the scroll assembly, be compressed, and then be discharged from the scroll compressor.

[0048] Among them, since the air outlet gap is located between the stator and the rotor and / or between the stator and the inner shell, and the temperature of the refrigerant gas is lower than the temperature of the motor, the refrigerant gas can cool the motor when passing through the air outlet gap, thereby effectively discharging the heat from the motor, reducing the temperature of the motor, and thus extending the service life of the motor. Moreover, since only a portion of the refrigerant gas passes through the air outlet gap, the remaining refrigerant gas enters the upper chamber from between the upper air inlet holes on the upper chamber. In this way, the amount of refrigerant gas passing through the air outlet gap is relatively small, which can achieve the effect of cooling the motor without causing a large power loss. It can achieve a balance between cooling the motor and reducing the suction loss, thereby effectively improving the energy efficiency of the compressor and improving the user experience. Moreover, compared with the prior art, the scroll compressor disclosed in this invention has a simple air guide structure, low manufacturing difficulty, and relatively low processing cost.

[0049] For ease of understanding, the specific structure and working principle of the scroll compressor of the present disclosure will be described in detail below in conjunction with an embodiment with reference to FIG. 1 to FIG. 4 .

[0050] As shown in FIG. 1 and FIG. 2 , the present disclosure provides a scroll compressor, which includes at least an outer shell 1 , an inner shell 2 , a motor 3 and a scroll assembly 4 .

[0051] The outer shell 1 is provided with an air inlet 11. It is understood that, as shown in Figures 1 and 2, the outer shell 1 is also provided with an air outlet 12 for the compressed refrigerant gas to be discharged from the scroll compressor. The inner shell 2 is provided within the outer shell 1 and is used to mount various structures required for the scroll compressor.

[0052] The motor 3 is arranged in the inner shell 2 and includes a stator 31 and a rotor 32 arranged in the stator 31. It can be understood that the motor 3 can also include an upper coil 33 and a lower coil 34, which are used to pass current to drive the rotor 32 to rotate relative to the stator 31.

[0053] The scroll assembly 4 has a compression chamber 41 formed therein for compressing refrigerant gas, and is configured to be controlled by the motor 3 to compress the refrigerant gas. Specifically, a rotating shaft 35 is disposed within the rotor 32. The scroll assembly 4 may include an orbiting scroll 42 and a fixed scroll 43 disposed within the compression chamber 41. The orbiting scroll 42 is connected to the rotating shaft 35 via an eccentric shaft, and the rotating shaft 35 can drive the orbiting scroll 42 to rotate and translate relative to the fixed scroll 43.

[0054] Both the orbiting scroll 42 and the fixed scroll 43 have spiral profiles. The orbiting scroll 42 is mounted eccentrically relative to the fixed scroll 43, and they axially contact each other along several straight lines. Consequently, a series of crescent-shaped spaces, or elementary volumes, are formed between the orbiting scroll 42 and the fixed scroll 43. As the orbiting scroll 42 rotates around the center of the fixed scroll 43 and performs non-rotating translational motion within a certain radius, the outer crescent-shaped spaces continuously move toward the center. At this point, the refrigerant gas is gradually pushed toward the central space, its volume decreasing while its pressure increasing until it connects to the central exhaust port and is discharged through the exhaust port in the housing 1.

[0055] The area between the motor 3 and the scroll assembly 4 in the inner shell 2 is the upper chamber 21. An air outlet gap 23 is provided between the stator 31 and the rotor 32 and / or between the stator 31 and the inner shell 2. The air outlet gap 23 and the upper chamber 21 are interconnected, so that the refrigerant gas can enter the upper chamber 21 from the air outlet gap 23.

[0056] Specifically, since the rotor 32 rotates relative to the stator 31 during operation of the motor 3, a gap must be reserved between the stator 31 and the rotor 32. This gap can serve as the steam outlet gap 23. When the stator 31 is mounted on the inner surface of the inner casing 2, it can be tightly fitted with the inner surface of the inner casing 2, or a partial gap can be left. If a gap extending vertically between the stator 31 and the inner surface of the inner casing 2 is left, this gap can also serve as the steam outlet gap.

[0057] As shown in Figure 2, an upper air inlet 24 is opened on the upper chamber 21; the temperature of the refrigerant gas entering from the air inlet 11 is lower than the temperature of the motor 3, and the refrigerant gas entering from the air inlet 11 is configured to enter the compression chamber 41 partially from the upper air inlet 24 and enter the compression chamber 41 partially from the air outlet gap 23 to absorb heat from the motor 3.

[0058] During the operation of the scroll compressor disclosed herein, the refrigerant gas will enter the outer shell 1 from the air inlet 11, and then part of the refrigerant gas will enter the upper chamber 21 from the upper air inlet hole 24, and part of the refrigerant gas will enter the upper chamber 21 from the steam outlet gap, and then the refrigerant gas in the upper chamber 21 will enter the compression chamber 41 of the scroll assembly 4, be compressed, and then be discharged from the scroll compressor.

[0059] Among them, since the air outlet gap 23 is located between the stator 31 and the rotor 32 and / or between the stator 31 and the inner shell 2, and the temperature of the refrigerant gas is lower than the temperature of the motor 3, the refrigerant gas can cool the motor 3 when passing through the air outlet gap 23, thereby effectively discharging the heat from the motor 3, reducing the temperature of the motor 3, and thereby extending the service life of the motor 3.

[0060] Moreover, since only a portion of the refrigerant gas passes through the steam outlet gap, the remaining refrigerant gas enters the upper chamber 21 through the upper air inlet holes 24 on the upper chamber 21. In this way, the amount of refrigerant gas passing through the steam outlet gap is relatively small, which can achieve the effect of cooling the motor 3 without causing significant power loss. It can achieve a balance between cooling the motor and reducing suction loss, thereby effectively improving the energy efficiency of the compressor and enhancing the user experience. Moreover, compared with the prior art, the scroll compressor disclosed in the present invention has a simple air guide structure, low manufacturing difficulty, and relatively low processing cost.

[0061] It is understood that, as shown in FIG3 , in one embodiment of the present disclosure, the scroll compressor of the present disclosure further includes a frame 5, which is disposed between the motor 3 and the scroll assembly 4 and is configured to support the scroll assembly 4. The frame 5 is provided with an air inlet passage, through which the refrigerant gas is configured to enter the compression chamber 41. During operation of the scroll compressor of the present disclosure, the refrigerant gas entering the upper chamber 21 enters the compression chamber 41 of the scroll assembly 4 through the air inlet passage on the frame 5.

[0062] Furthermore, as shown in Figure 2, in one embodiment of the present disclosure, the area of ​​the motor 3 in the inner shell 2 away from the scroll assembly 4 is a lower chamber 22, and a lower air vent 25 is provided on the lower chamber 22. The lower air vent 25 includes a lower air inlet 251 and a lower air outlet 252. The refrigerant gas entering from the air inlet 11 is configured to at least partially enter the lower air inlet 251; the lower air outlet 252 is connected to the upper air inlet 24 through the gap between the inner shell 2 and the outer shell 1.

[0063] During the operation of the scroll compressor disclosed herein, at least part of the refrigerant gas entering from the air inlet 11 enters the lower air inlet hole 251, and thus enters the lower chamber 22. Then, part of the refrigerant gas in the lower chamber 22 flows from the air outlet gap 23 to the upper chamber 21, and part of it flows out from the lower air outlet hole 252 and flows from the gap between the inner shell 2 and the outer shell 1 to the upper chamber 21.

[0064] Among them, the up and down in the upper chamber 21 and the lower chamber 22 in the present disclosure only refer to the directions in the figure, and do not represent the actual installation direction of the scroll compressor. The same applies to other structures and will not be repeated here.

[0065] In this way, the scroll compressor disclosed in the present invention can allow part of the refrigerant gas to enter the lower chamber 22 and then be diverted in the lower chamber 22, with part flowing into the air outlet gap 23 and part flowing out from the lower air outlet hole 252 of the lower chamber 22. In this way, the amount of refrigerant gas flowing into the air outlet gap can be guaranteed, thereby ensuring that the motor 3 can be fully cooled, avoiding the situation where the motor 3 is overheated or even burned; and because the cross-sectional area of ​​the air outlet gap 23 is small, when a large amount of refrigerant gas enters the lower chamber 22, the excess refrigerant gas can flow out from the lower air outlet hole 252 and flow from the gap between the inner shell 2 and the outer shell 1 to the upper chamber 21, thereby reducing the power loss of the refrigerant gas when flowing from the air outlet gap 23 and reducing the suction resistance of the scroll compressor.

[0066] As shown in Figure 2, it can be understood that the upper wire package 33 is located in the upper chamber 21, and the lower wire package 34 is located in the lower chamber 22. Therefore, in one embodiment of the present disclosure, the refrigerant gas in the upper chamber 21 is configured to cool the upper wire package 33, and the refrigerant gas in the upper chamber 21 includes the refrigerant gas entering the upper chamber 21 from the air inlet 11 through the lower chamber 22 and the air outlet gap 23, the refrigerant gas entering the upper chamber 21 from the air inlet 11 through the upper air inlet hole 24, and the refrigerant gas entering the upper chamber 21 from the air inlet 11 through the lower chamber 22, the lower air vent 25 and the upper air inlet hole 24; the refrigerant gas in the lower chamber 22 is configured to cool the lower wire package 34.

[0067] As shown in Figure 5, the refrigerant gas in the upper chamber 21 comes from two paths, one is from the air outlet gap 23, and the other is from the upper air inlet 24. The refrigerant gas from the upper air inlet 24 can be divided into two parts. One part enters the upper air inlet 24 directly from the air inlet 11, and the other part enters the lower chamber 22 from the air inlet 11, and then flows out from the lower air vent 25 to the gap between the inner shell 2 and the outer shell 1, and enters the lower chamber 22 from the upper air inlet 24.

[0068] Because at least a portion of the refrigerant gas can enter the lower chamber 22 to cool the lower coil 34, while all of the refrigerant gas enters the upper chamber 21 to cool the upper coil 33 before flowing to the compression chamber 41, there is no situation where some refrigerant gas fails to cool the motor 3. Thus, although the refrigerant gas cooling the lower coil 34 is only the portion of the refrigerant gas entering through the air inlet 11, its temperature is relatively low and can effectively cool the lower coil 34; and once all of the refrigerant gas enters the upper chamber 21, it can also effectively cool the upper coil 33. In this way, the scroll compressor of the present disclosure can, to a certain extent, avoid uneven cooling between the upper and lower coils 33, 34, prevent localized excessive temperatures in a particular coil, and thus effectively extend the service life of the motor 3.

[0069] It will be appreciated that, in one embodiment of the present disclosure, the refrigerant gas entering through the air inlet 11 is configured to partially enter the lower air inlet hole 251, and partially flow directly from the lower air outlet hole 252 and the upper air inlet hole 24 through the gap between the inner shell 2 and the outer shell 1 to the upper chamber 21. By controlling the amount of refrigerant gas entering the lower air inlet hole 251, the lower line package 34 can be effectively cooled, preventing the lower line package 34 from overheating.

[0070] In another embodiment of the present disclosure, the refrigerant gas entering from the air inlet 11 is configured to enter the lower air inlet hole 251. During the operation of the scroll compressor of the present disclosure, the refrigerant gas entering from the air inlet 11 enters the lower air inlet hole 251, and then enters the lower chamber 22. Then, part of the refrigerant gas in the lower chamber 22 flows from the air outlet gap 23 to the upper chamber 21, and part of the refrigerant gas flows out from the lower air outlet hole 252 and then flows from the gap between the inner shell 2 and the outer shell 1 to the upper chamber 21.

[0071] In this way, the scroll compressor disclosed in the present invention can allow all the refrigerant gas to enter the lower chamber 22 and then be diverted in the lower chamber 22, with part of it flowing into the air outlet gap 23 and part of it flowing out from the lower air outlet hole 252 of the lower chamber 22. In this way, the amount of refrigerant gas flowing into the air outlet gap can be guaranteed, thereby ensuring that the motor 3 can be fully cooled, avoiding the situation where the motor 3 is overheated or even burned; and because the cross-sectional area of ​​the air outlet gap 23 is small, when a large amount of refrigerant gas enters the lower chamber 22, the excess refrigerant gas can flow out from the lower air outlet hole 252 and flow from the gap between the inner shell 2 and the outer shell 1 to the upper chamber 21, thereby reducing the power loss of the refrigerant gas when flowing from the air outlet gap 23 and reducing the suction resistance of the scroll compressor.

[0072] Because all the refrigerant gas can enter the lower chamber 22 to cool the lower coil 34, then enter the upper chamber 21 to cool the upper coil 33 before flowing to the compression chamber 41, there is no situation where part of the refrigerant gas fails to cool the motor 3. In this way, the scroll compressor of the present disclosure can also avoid uneven cooling between the upper coil 33 and the lower coil 34, preventing localized overheating of a coil, thereby effectively extending the service life of the motor 3.

[0073] Specifically, in order to allow a portion of the refrigerant gas entering from the air inlet 11 to enter the lower air inlet hole 251 of the scroll member, as shown in Figures 2 and 4, in one embodiment of the present disclosure, the scroll compressor of the present disclosure further includes an air guide 26. The air guide 26 is disposed on the inner shell 2, and one end of the air guide 26 is connected to the lower air inlet hole 251, while the opening of the other end is directly opposite the outlet of the air inlet 11. Because the opening of the air guide 26 is directly opposite the outlet of the air inlet 11, when the refrigerant gas flows from the air inlet 11 into the outer shell 1, a portion of the refrigerant gas will enter the opening of the air guide 26, thereby flowing along the air guide 26 from the lower air inlet hole 251 into the lower chamber 22. In another embodiment of the present disclosure, one end of the air guide 26 is connected to the lower air inlet hole 251, and the opening of the other end is connected to the outlet of the air inlet 11. In this way, after the refrigerant gas flows from the air inlet 11 into the outer shell 1, a portion of the refrigerant gas will enter the opening of the air guide 26. In another embodiment of the present disclosure, the air guide portion 26 can also be set on the shell 1, with one end connected to the air inlet 11 and the opening at the other end connected to the lower air inlet hole 251. The principle is similar and will not be repeated here.

[0074] As shown in FIG2 , in order to allow more refrigerant gas to enter the opening of the air guide portion 26, in one embodiment of the present disclosure, the diameter of the opening of the air guide portion 26 is larger than the diameter of the air inlet 11. Since the diameter of the opening of the air guide portion 26 is larger than the diameter of the outlet of the air inlet 11, and the opening of the air guide portion 26 is directly opposite the outlet of the air inlet 11, during the operation of the scroll compressor of the present disclosure, most of the refrigerant gas flowing out of the outlet of the air inlet 11 will enter the air guide portion 26, thereby ensuring that the refrigerant gas entering the lower chamber 22 can effectively cool the lower coil 34, thereby preventing the lower coil 34 from overheating.

[0075] Furthermore, as shown in FIG2 , in one embodiment of the present disclosure, an air guide portion 26 is provided on the inner shell 2, the inlet of the air guide portion 26 is directly opposite to the opening of the outer shell 1, and the distance between the outer contour of the air guide portion 26 and the inner side surface of the outer shell 1 is 2 to 15 mm. When the distance between the outer contour of the air guide portion 26 and the inner side surface of the outer shell 1 is greater than or equal to 2 mm, the assembly accuracy between the air guide portion 26 and the outer shell 1 can be effectively guaranteed, and contact between the outer contour of the air guide portion 26 and the inner side surface of the outer shell 1 can be prevented; when the distance between the outer contour of the air guide portion 26 and the inner side surface of the outer shell 1 is less than or equal to 15 mm, it can be ensured that a large amount of refrigerant gas will not enter the upper air inlet 24 from the gap between the air guide portion 26 and the inner side surface of the outer shell 1, thereby ensuring the cooling effect on the motor 3.

[0076] Furthermore, in one embodiment of the present disclosure, the distance between the outer contour of the air guide portion 26 and the inner side surface of the housing 1 is 5 mm, which can effectively improve the cooling effect on the motor 3 and ensure the assembly accuracy between the air guide portion 26 and the housing 1.

[0077] In the above embodiment, the distance between the outer contour of the air guide portion 26 and the inner side surface of the shell 1 is 5 mm. In other embodiments, the distance between the outer contour of the air guide portion 26 and the inner side surface of the shell 1 can also be adjusted as needed, which is not limited here.

[0078] In order to ensure that all the refrigerant gas entering from the air inlet 11 enters the lower air inlet hole 251 of the scroll member, in another embodiment of the present disclosure, the scroll compressor of the present disclosure further includes an air guide portion 26, and the air guide portion 26 is configured to be connected to the air inlet 11 and the lower air inlet hole 251 at both ends. In this way, during the operation of the scroll compressor of the present disclosure, the refrigerant gas entering from the air inlet 11 can enter the lower air inlet hole 251 along the air guide portion 26, and then enter the lower chamber 22. Then, part of the refrigerant gas in the lower chamber 22 flows from the air outlet gap 23 to the upper chamber 21, and part of the refrigerant gas flows out from the lower air outlet hole 252 and then flows from the gap between the inner shell 2 and the outer shell 1 to the upper chamber 21.

[0079] As shown in FIG4 , in one embodiment of the present disclosure, the area of ​​each upper air inlet hole 24 is configured to be smaller than the sum of the areas of the lower air outlet holes 252. By making the area of ​​each upper air inlet hole 24 smaller than the sum of the areas of the lower air outlet holes 252, the amount of refrigerant gas flowing into the air outlet gap 23 can meet the requirements, thereby effectively cooling the motor 3 and reducing the temperature of the motor 3.

[0080] It can be understood that the area ratio between the upper air inlet hole 24 and the lower air outlet hole 252 can ensure that the amount of refrigerant gas flowing to the air outlet gap 23 is neither too much nor too little, so that the motor 3 can be effectively cooled without causing excessive power loss of the refrigerant gas.

[0081] As shown in FIG4 , in one embodiment of the present disclosure, the number of upper air inlet holes 24 is greater than the number of lower air outlet holes 252, and the area of ​​each upper air inlet hole 24 is smaller than the area of ​​the lower air outlet holes 252. By ensuring that the number of upper air inlet holes 24 is greater than the number of lower air outlet holes 252 and the area of ​​each upper air inlet hole 24 is smaller than the area of ​​the lower air outlet holes 252, the refrigerant gas flowing out of the lower air outlet holes 252 can enter the upper chamber 21 through multiple upper air inlet holes 24, thereby ensuring that the refrigerant gas is more evenly distributed when flowing in the gap between the inner shell 2 and the outer shell 1.

[0082] Specifically, in the scroll compressor disclosed herein, the cooling effect of the motor 3 and the suction loss of the scroll compressor can be balanced by adjusting the area and number of the upper air inlet holes 24. The structure is simple and the processing cost is relatively low.

[0083] Furthermore, as shown in FIG4 , in one embodiment of the present disclosure, the upper air inlet holes 24 and the lower air vent holes 25 are configured to be evenly distributed around the circumference of the inner shell 2. Since the upper air inlet holes 24 and the lower air vent holes 25 are evenly distributed around the circumference of the inner shell 2, the distance from each lower air outlet hole 252 to the upper upper air inlet hole 24 above is relatively close, and the amount of refrigerant gas around the circumference of the inner shell 2 is relatively balanced, preventing excess gas on one side.

[0084] The embodiments of the present disclosure have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terms used herein are selected to best explain the principles of the embodiments, their practical applications, or technical improvements in the marketplace, or to enable other persons skilled in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.

Claims

1. A scroll compressor, characterized in that: include: A housing (1), wherein the housing (1) is provided with an air inlet (11); An inner shell (2), wherein the inner shell (2) is arranged in the outer shell (1); A motor (3), the motor (3) being arranged in the inner shell (2) and comprising a stator (31) and a rotor (32) arranged in the stator (31); A scroll assembly (4), wherein a compression chamber (41) for compressing refrigerant gas is formed in the scroll assembly (4), and the scroll assembly (4) is configured to be controlled by the motor (3) to compress the refrigerant gas; An air outlet gap (23) is provided between the stator (31) and the rotor (32) and / or between the stator (31) and the inner shell (2); the area between the motor (3) and the scroll assembly (4) in the inner shell (2) is an upper chamber (21); an upper air inlet hole (24) is provided on the upper chamber (21); the temperature of the refrigerant gas entering from the air inlet (11) is lower than the temperature of the motor (3); and the refrigerant gas entering from the air inlet (11) is configured to partially enter the compression chamber (41) from the upper air inlet hole (24) and partially enter the compression chamber (41) from the air outlet gap (23) to absorb heat from the motor (3).

2. The scroll compressor according to claim 1, characterized in that: The area of ​​the inner shell (2) on the side of the motor (3) away from the scroll assembly (4) is a lower chamber (22), and a lower air vent (25) is provided on the lower chamber (22). The lower air vent (25) includes a lower air inlet (251) and a lower air outlet (252). The refrigerant gas entering from the air inlet (11) is configured to at least partially enter the lower air inlet (251); the lower air outlet (252) is connected to the upper air inlet (24) through a gap between the inner shell (2) and the outer shell (1).

3. The scroll compressor according to claim 2, characterized in that: The motor (3) further comprises an upper wire package (33) and a lower wire package (34), wherein the upper wire package (33) is located in the upper chamber (21), and the lower wire package (34) is located in the lower chamber (22), and the refrigerant gas in the upper chamber (21) is configured to cool the upper wire package (33), and the refrigerant gas in the upper chamber (21) comprises the refrigerant gas entering the upper chamber (21) from the air inlet (11) through the lower chamber (22) and the air outlet gap (23), the refrigerant gas entering the upper chamber (21) from the air inlet (11) through the upper air inlet hole (24), and the refrigerant gas entering the upper chamber (21) from the air inlet (11) through the lower chamber (22), the lower air vent (25) and the upper air inlet hole (24), and the refrigerant gas in the lower chamber (22) is configured to cool the lower wire package (34).

4. The scroll compressor according to claim 2, characterized in that: It also comprises an air guide portion (26), which is arranged on the inner shell (2) or the outer shell (1), and one end of which is connected to the lower air inlet hole (251), and the opening of the other end is directly opposite to the outlet of the air inlet (11).

5. The scroll compressor according to claim 4, characterized in that: The air guide portion (26) is arranged on the inner shell (2), the inlet of the air guide portion (26) is directly opposite to the opening of the outer shell (1), and the distance between the outer contour of the air guide portion (26) and the inner side surface of the outer shell (1) is 2 to 15 mm.

6. The scroll compressor according to claim 2, characterized in that: The refrigerant gas entering from the air inlet (11) is configured to completely enter the lower air inlet hole (251).

7. The scroll compressor according to claim 6, characterized in that: It also comprises an air guide portion (26), wherein the air guide portion (26) is configured such that two ends thereof are respectively in communication with the air inlet (11) and the lower air inlet hole (251).

8. The scroll compressor according to claim 2, characterized in that: The area of ​​each of the upper air inlet holes (24) is configured to be smaller than the sum of the areas of the lower air outlet holes (252).

9. The scroll compressor according to claim 8, characterized in that: The number of the upper air inlet holes (24) is greater than the number of the lower air outlet holes (252), and the area of ​​each of the upper air inlet holes (24) is smaller than the area of ​​the lower air outlet holes (252).

10. The scroll compressor according to claim 2, characterized in that: The upper air inlet holes (24) and the lower air vent holes (25) are configured to be evenly distributed in the circumferential direction of the inner shell (2).

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