Air suction channel structure, static scroll plate and scroll compressor

Abstract

The invention provides an air suction channel structure, a static scroll plate and a scroll compressor, relates to the technical field of compressors, and solves the technical problems that the joint of an air suction channel and a molded line air suction cavity is unreasonable in structural design, and large air suction resistance and air suction pulsation noise are easy to occur. The air suction channel structure comprises an air suction channel arranged on the static scroll plate, one end of the air suction channel communicates with an air suction pipe on the back face of the static scroll plate, and the other end of the air suction channel communicates with an air suction cavity on the front face molded line side of the static scroll plate. An air suction expansion structure is further included; the air suction expansion structure is arranged at the joint of the air suction channel and the front molded line side air suction cavity so as to increase the radial size of the air suction channel and increase the flowing area of the joint. The suction expansion structure is arranged at the joint of the suction channel and the static disc front molded line side suction cavity, the area of the suction channel is increased, gas pulsation is reduced, vibration excitation of the suction channel to the compressor is reduced, reliable operation of the compressor is achieved, and the problems of suction resistance loss and pulsation noise are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to an air intake passage structure, a stationary scroll disk and a scroll compressor. Background Art

[0002] The scroll compressor consists of a sealed shell, a fixed scroll, a movable scroll, a bracket, an eccentric crankshaft, an anti-rotation mechanism and a motor. The profiles of the movable and fixed scrolls are both spiral. The movable scroll is eccentric to the fixed scroll and installed 180° apart, so multiple crescent-shaped spaces are formed between the movable and fixed scrolls. The movable scroll takes the center of the fixed scroll as the rotation center and performs a non-rotating rotational translation with a certain rotation eccentric radius. The outer crescent-shaped space continuously moves toward the center. At this time, the refrigerant is gradually pushed toward the center space, and its volume continues to shrink while the pressure continues to increase until it is connected to the central exhaust hole. The high-pressure refrigerant is discharged from the pump body, completing the compression process. The entire compression process can be simplified as: suction → compression → discharge. As the first link of the entire compression process, suction is the first link of the entire compression process, and the design of the suction channel structure directly determines the performance of the compressor.

[0003] The applicant has found that the prior art has at least the following technical problems:

[0004] like Figure 6 and Figure 7 As shown, the suction channel structure design on the static scroll disk in the prior art is unreasonable, resulting in problems such as large suction resistance, suction resistance loss and suction pulsation noise at the connection between the suction channel and the profile suction cavity. Summary of the invention

[0005] The object of the present invention is to provide an intake channel structure, a static scroll disk and a scroll compressor, so as to solve the technical problems existing in the prior art that the structural design of the connection between the intake channel and the profile intake cavity is unreasonable, and that large intake resistance and intake pulsation noise are prone to occur.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides an air intake channel structure, including an air intake channel arranged on a static scroll disk, wherein one end of the air intake channel is connected to an air intake pipe on the back side of the static scroll disk, and the other end is connected to an air intake cavity on the front profile side of the static scroll disk; and also includes an air intake expansion structure; the air intake expansion structure is arranged at the connection between the air intake channel and the air intake cavity on the front profile side to increase the radial size of the air intake channel and increase the flow area at the connection.

[0008] The air intake channel structure provided by the present invention optimizes the structure of the connection between the air intake channel and the air intake cavity on the front profile side of the stator disk by arranging an air intake expansion structure at the connection between the air intake channel and the air intake cavity on the front profile side of the stator disk, thereby increasing the area of ​​the air intake channel, reducing gas pulsation, and reducing the vibration excitation of the compressor by the air intake channel, thereby realizing reliable operation of the compressor and improving the air intake resistance loss and pulsation noise problems of the high-speed scroll compressor.

[0009] As a further improvement of the present invention, the air intake expansion structure includes an arc expansion surface, and the end of the arc expansion surface intersects with the air intake cavity; or, the air intake expansion structure includes a smooth curve expansion surface, and the end of the smooth curve expansion surface intersects with the air intake cavity.

[0010] As a further improvement of the present invention, when the vortex teeth of the static scroll disk are arranged clockwise, the center of the circular arc extension surface is located in the first, third, and fourth quadrants of the Cartesian coordinate system established with the center of the exhaust hole or on the axis of the horizontal coordinate; or, the center of the radius of curvature corresponding to each point of the smooth curve extension surface is located in the first, third, and fourth quadrants of the Cartesian coordinate system established with the center of the exhaust hole or on the axis of the horizontal coordinate.

[0011] As a further improvement of the present invention, when the vortex teeth of the static scroll disk are arranged counterclockwise, the center of the circular arc extension surface is located within the first, second, and third quadrants of the Cartesian coordinate system established with the center of the exhaust hole or on the horizontal axis; or, the center of the curvature radius corresponding to each point of the smooth curve extension surface is located within the first, second, and third quadrants of the Cartesian coordinate system established with the center of the exhaust hole or on the horizontal axis.

[0012] As a further improvement of the present invention, when the volute of the fixed scroll is arranged in a clockwise direction, the slope of the straight line expansion surface is a positive value.

[0013] As a further improvement of the present invention, when the volute of the fixed scroll is arranged counterclockwise, the slope of the straight line expansion surface is a negative value.

[0014] As a further improvement of the present invention, the height h of the air intake expansion structure along the axial direction of the air intake channel satisfies the following formula:

[0015] 0.21H≤h≤1.85H; wherein H is the height of the volute.

[0016] The present invention provides a stationary scroll disk, comprising a stationary scroll disk body, wherein a spiral vortex tooth is arranged on the front side of the stationary scroll disk body, and an air suction cavity is formed at the tail end of the vortex tooth; an exhaust hole is opened at the center of the vortex tooth; and the air suction channel structure is also provided on the stationary scroll disk body and communicated with the air suction cavity.

[0017] The static scroll disk provided by the present invention is provided with an air intake expansion structure on the static scroll disk of the scroll compressor. The air intake expansion structure is located at the connection between the static scroll channel and the air intake cavity on the front profile side, which can increase the radial dimension and thus increase the flow area at the connection.

[0018] The present invention provides a scroll compressor, comprising the fixed scroll plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a cross-sectional view of the entire scroll compressor of the present invention;

[0021] Figure 2 1 is a front structural schematic diagram of the static scroll of the present invention;

[0022] Figure 3 1 is a schematic diagram of the back structure of the static scroll of the present invention;

[0023] Figure 4 It is an enlarged schematic diagram of an embodiment of the air intake expansion structure in the air intake channel structure of the present invention;

[0024] Figure 5 is a cross-sectional view of the structure of the air intake passage in the static scroll of the present invention;

[0025] Figure 6 It is an enlarged schematic diagram of the suction channel structure of the static scroll disk in the prior art without the suction expansion structure;

[0026] Figure 7 It is a cross-sectional view of the suction channel structure of the static scroll disk in the prior art without the suction expansion structure;

[0027] Figure 8 It is a structural schematic diagram of another embodiment of the air intake expansion structure in the air intake channel structure of the present invention.

[0028] In the figure, 1, scroll compressor; 2, compression mechanism; 3, driving part; 4, motor; 5, static scroll; 51, suction channel; 511, suction expansion structure; 52, suction cavity; 53, exhaust hole; 6, movable scroll; 7, cross ring; 8, upper bracket; 9, upper cover; 10, cylinder; 13, crankshaft; 25, lower cover. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0030] Embodiment 1:

[0031] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention provides an air intake channel structure, including an air intake channel 51 arranged on the fixed scroll plate 5, one end of the air intake channel 51 is connected to the air intake pipe on the back side of the fixed scroll plate 5, and the other end is connected to the air intake cavity 52 on the front profile side of the fixed scroll plate 5, as shown in FIG. Figure 2 As shown, the front profile side of the fixed scroll 5 has a spiral scroll tooth, a channel is formed between adjacent scroll teeth, an air suction chamber 52 is formed at the end of the scroll tooth, and an exhaust hole 53 is provided at the center of the scroll tooth; the refrigerant enters through the suction pipe of the scroll compressor, and is then sent into the suction channel 51, and finally discharged through the suction chamber 52 along the scroll tooth through the exhaust hole 53; in order to solve the problem of large intake resistance between the suction channel 51 and the suction chamber 52 on the front profile side of the fixed scroll 5, resulting in suction loss, as shown in FIG. Figure 3 As shown, the present invention provides an air intake expansion structure 511 in the air intake channel 51; specifically, the air intake expansion structure 511 is provided at the connection between the air intake channel 51 and the air intake cavity 52 on the front profile side to increase the radial dimension of the air intake channel 51 and increase the flow area at the connection.

[0032] The structure of the intake channel 51 provided by the present invention optimizes the structure of the connection between the intake channel 51 and the intake cavity 52 on the front profile side of the stator disk by arranging an intake expansion structure 511 at the connection between the intake channel 51 and the intake cavity 52 on the front profile side of the stator disk, thereby increasing the area of ​​the intake channel 51, reducing gas pulsation, and reducing the vibration excitation of the compressor by the intake channel 51, thereby realizing reliable operation of the compressor and improving the intake resistance loss and pulsation noise problems of the high-speed scroll compressor 1.

[0033] As an optional embodiment of the present invention, the air intake expansion structure 511 includes an arc expansion surface, the end of which intersects with the air intake cavity 52; this structure not only increases the flow area of ​​the air intake channel structure, but also reduces the airflow resistance to reduce airflow losses. It should be noted here that the arc expansion surface refers to the expansion structure being composed of arcs of the same arc, and the position of the arc center can be obtained according to actual calculations, while ensuring that the flow area is increased and the air intake pipe and the vortex teeth are not affected.

[0034] As an optional embodiment of the present invention, when the vortex of the fixed scroll 5 is arranged counterclockwise, the center of the arc expansion surface is located in the first, second, and third quadrants of the Cartesian coordinate system established with the center of the exhaust hole or on the horizontal axis. When the vortex of the fixed scroll 5 is arranged clockwise, the center of the arc expansion surface is located in the first, third, and fourth quadrants of the Cartesian coordinate system established with the center of the exhaust hole or on the horizontal axis;

[0035] As a further improvement of the present invention, the height h of the air intake expansion structure 511 along the axial direction of the air intake channel 51 satisfies the following formula:

[0036] 0.21H≤h≤1.85H; wherein H is the height of the volute.

[0037] Embodiment 2:

[0038] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention provides an air intake channel structure, including an air intake channel 51 arranged on the fixed scroll plate 5, one end of the air intake channel 51 is connected to the air intake pipe on the back side of the fixed scroll plate 5, and the other end is connected to the air intake cavity 52 on the front profile side of the fixed scroll plate 5, as shown in FIG. Figure 2 As shown, the front profile side of the fixed scroll 5 has a spiral scroll tooth, a channel is formed between adjacent scroll teeth, an air suction chamber 52 is formed at the end of the scroll tooth, and an exhaust hole 53 is provided at the center of the scroll tooth; the refrigerant enters through the suction pipe of the scroll compressor, and is then sent into the suction channel 51, and finally discharged through the suction chamber 52 along the scroll tooth through the exhaust hole 53; in order to solve the problem of large intake resistance between the suction channel 51 and the suction chamber 52 on the front profile side of the fixed scroll 5, resulting in suction loss, as shown in FIG. Figure 3 As shown, the present invention provides an air intake expansion structure 511 in the air intake channel 51; specifically, the air intake expansion structure 511 is provided at the connection between the air intake channel 51 and the air intake cavity 52 on the front profile side to increase the radial dimension of the air intake channel 51 and increase the flow area at the connection.

[0039] The structure of the intake channel 51 provided by the present invention optimizes the structure of the connection between the intake channel 51 and the intake cavity 52 on the front profile side of the stator disk by arranging an intake expansion structure 511 at the connection between the intake channel 51 and the intake cavity 52 on the front profile side of the stator disk, thereby increasing the area of ​​the intake channel 51, reducing gas pulsation, and reducing the vibration excitation of the compressor by the intake channel 51, thereby realizing reliable operation of the compressor and improving the intake resistance loss and pulsation noise problems of the high-speed scroll compressor 1.

[0040] As another optional embodiment of the present invention, Figure 3-Figure 5As shown, the air intake expansion structure 511 includes a smooth curved expansion surface, and the end of the smooth curved expansion surface intersects with the air intake cavity 52. ​​This structure not only increases the flow area of ​​the air intake channel structure, but also reduces the airflow resistance to reduce airflow loss. It should be noted here that the smooth curved expansion surface refers to a surface composed of at least two arc segments with different centers (that is, arc segments with different radii), and there is a smooth transition structure between adjacent arc segments. The position of the center of each arc segment needs to be obtained by calculation, such as Figure 4 shown.

[0041] Figure 4 The middle air intake extension structure 511 is a smooth curved extension surface, which is formed by connecting a number of arc segments end to end. For example, the radius of the first arc segment is R1, the radius of the second arc segment is R2, and the radius of the i-1 arc segment is R i-1 , the radius of the i-th arc segment is R i ; The center of the first arc segment is O1, the center of the second arc segment is O2, and the center of the i-1th arc segment is O i-1 , the center of the i-th arc segment is O i It can be seen that the radius of each arc segment is different, and the position of the center of the circle is also different. The area where the air intake expansion structure 511 is located is a0.

[0042] like Figure 5 As shown, the area of ​​the air intake expansion structure 511 is S0, and the area of ​​the conventional air intake channel 51 in the prior art is S. Figure 5 It can be seen that by providing the air intake expansion structure 511, the area of ​​the air intake channel 51 is increased, the air intake area at the connection with the air intake cavity 52 is increased, the air intake components are reduced, and the air intake loss is reduced.

[0043] As a further improvement of the present invention, Figure 4 As shown, when the vortex teeth of the fixed scroll 5 are arranged clockwise, the center of the curvature radius corresponding to each point of the smooth curve extension surface is located in the first, third, and fourth quadrants of the Cartesian coordinate system established with the exhaust hole center or on the horizontal axis.

[0044] As a further improvement of the present invention, when the vortex teeth of the fixed vortex disk 5 are set counterclockwise, the center of the curvature radius corresponding to each point of the smooth curve extension surface is located within the first, second, and third quadrants of the Cartesian coordinate system established with the center of the exhaust hole or on the horizontal coordinate axis.

[0045] As a further improvement of the present invention, the height h of the air intake expansion structure 511 along the axial direction of the air intake channel 51 satisfies the following formula:

[0046] 0.21H≤h≤1.85H; wherein H is the height of the volute.

[0047] Embodiment 3:

[0048] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention provides an air intake channel structure, including an air intake channel 51 arranged on the fixed scroll plate 5, one end of the air intake channel 51 is connected to the air intake pipe on the back side of the fixed scroll plate 5, and the other end is connected to the air intake cavity 52 on the front profile side of the fixed scroll plate 5, as shown in FIG. Figure 2 As shown, the front profile side of the fixed scroll 5 has a spiral scroll tooth, a channel is formed between adjacent scroll teeth, an air suction chamber 52 is formed at the end of the scroll tooth, and an exhaust hole 53 is provided at the center of the scroll tooth; the refrigerant enters through the suction pipe of the scroll compressor, and is then sent into the suction channel 51, and finally discharged through the suction chamber 52 along the scroll tooth through the exhaust hole 53; in order to solve the problem of large intake resistance between the suction channel 51 and the suction chamber 52 on the front profile side of the fixed scroll 5, resulting in suction loss, as shown in FIG. Figure 3 As shown, the present invention provides an air intake expansion structure 511 in the air intake channel 51; specifically, the air intake expansion structure 511 is provided at the connection between the air intake channel 51 and the air intake cavity 52 on the front profile side to increase the radial dimension of the air intake channel 51 and increase the flow area at the connection.

[0049] The structure of the intake channel 51 provided by the present invention optimizes the structure of the connection between the intake channel 51 and the intake cavity 52 on the front profile side of the stator disk by arranging an intake expansion structure 511 at the connection between the intake channel 51 and the intake cavity 52 on the front profile side of the stator disk, thereby increasing the area of ​​the intake channel 51, reducing gas pulsation, and reducing the vibration excitation of the compressor by the intake channel 51, thereby realizing reliable operation of the compressor and improving the intake resistance loss and pulsation noise problems of the high-speed scroll compressor 1.

[0050] In this embodiment, if Figure 8 As shown, the air intake expansion structure includes an inclined linear expansion surface, the end of which intersects with the air intake cavity 52. ​​This structure not only increases the flow area of ​​the air intake channel structure, but also reduces the air flow resistance to reduce air flow loss. It should be noted here that the linear expansion surface refers to the expansion surface being a linear structure, not an arc or curve structure.

[0051] Further, when the volute of the fixed scroll 5 is arranged clockwise, the slope of the straight-line extension surface is a positive value, and when the volute of the fixed scroll 5 is arranged counterclockwise, the slope of the straight-line extension surface is a negative value.

[0052] As a further improvement of the present invention, the height h of the air intake expansion structure 511 along the axial direction of the air intake channel 51 satisfies the following formula:

[0053] 0.21H≤h≤1.85H; wherein H is the height of the volute.

[0054] Embodiment 4:

[0055] In this embodiment, Figure 1-Figure 8 As shown, the present invention provides a stationary scroll 5, which includes a stationary scroll body, a spiral scroll tooth is arranged on the front of the stationary scroll body, and an air suction chamber 52 is formed at the tail end of the scroll tooth; an exhaust hole 53 is opened in the center of the scroll tooth; and also includes an air suction channel structure which is arranged through the stationary scroll body and connected with the air suction chamber 52.

[0056] The static scroll disk 5 provided by the present invention is provided with an air intake expansion structure 511 on the static disk of the scroll compressor 1. The air intake expansion structure 511 is located at the connection between the static disk channel and the air intake cavity 52 on the front profile side, which can increase the radial dimension and thus increase the flow area at the connection.

[0057] Embodiment 5:

[0058] In this embodiment, the present invention provides a scroll compressor 1 including the above-mentioned fixed scroll plate 5 .

[0059] like Figure 1 As shown, a scroll compressor 1 has a compression mechanism 2 and a driving part 3 placed in a sealed shell, and the sealed shell is composed of a closed container upper cover 9, a closed container cylinder 10 and a closed container lower cover 25. The compression mechanism 2 is composed of a fixed scroll 5, a movable scroll 6, and a cross ring 7. The driving part 3 is mainly composed of a motor 4 and a crankshaft 13.

[0060] During the operation of the scroll compressor 1, the driving part 3 drives the movable scroll 6 to rotate, and meshes with the fixed scroll 5 to form a crescent-shaped compression chamber. As the crankshaft 13 rotates, the refrigerant enters the suction channel 51 of the fixed scroll 5, and communicates with the suction chamber 52 on the front profile side of the fixed scroll. The movable scroll 6 rotates and moves in a linear manner and always maintains a good meshing state. The refrigerant in the suction chamber continuously moves toward the center, the volume continuously decreases, and the pressure in the chamber continuously increases. When the compression reaches a predetermined compression ratio, the refrigerant is discharged from the central exhaust hole 53 of the fixed scroll 5, enters the space of the sealed housing upper cover 9, passes through the exhaust channel of the fixed scroll 5 and the upper bracket 8, enters the space of the motor 4, cools the motor 4, and then is discharged from the scroll compressor 1 and enters the air conditioning system to complete the cooling / heating cycle.

[0061] like Figure 2-Figure 4 As shown, the front side of the fixed scroll 5 in the scroll compressor of the present invention has a spiral volute, and the height of the volute is H. The tail end thereof has a suction cavity 52, and an exhaust hole 53 is opened at the center.

[0062] Specific as Figure 3 The air intake channel 51 on the back side of the static scroll plate 5 is connected with the air intake cavity 52 at the front tail end, and an air intake expansion structure 511 is arranged in the air intake channel 51 on the back side.

[0063] like Figure 4As shown, the air intake expansion structure 511 is a circular arc or a smooth curve transition, and the circular arc or smooth curve transition structure intersects with the air intake chamber 52 of the vortex tooth. If the vortex tooth of the fixed vortex disk is arranged clockwise, the center of the circular arc of the air intake expansion structure or the center of the radius of curvature corresponding to each point of the smooth curve (O1, O2...Oi-1, Oi, where i is a natural number) falls within the first, third, and fourth quadrants of the Cartesian coordinate system established with the center of the exhaust hole or on the horizontal axis. If the vortex tooth of the fixed vortex disk is arranged counterclockwise, the center of the circular arc of the air intake expansion structure or the center of the radius of curvature corresponding to each point of the smooth curve (O1, O2...Oi-1, Oi, where i is a natural number) falls within the first, second, and third quadrants of the Cartesian coordinate system established with the center of the exhaust hole or on the horizontal axis.

[0064] The above-mentioned arc or smooth curve features constitute the channel area a0 formed by the air intake expansion structure, which extends in the axial direction to form an expansion of the air intake channel 51 space, thereby connecting the air intake expansion structure 511 with the static disk air intake channel 51 as a whole. During processing, the air intake expansion structure 511 of the air intake channel 51 of the static scroll disk 5 can be realized by milling or casting. In the present invention, the axial extension height dimension of the air intake expansion structure 511 is h. At the same time, it is preferably required to meet the following formula requirements: 0.21H≤h≤1.85H, where H is the height of the scroll tooth.

[0065] like Figure 5 As shown in the cross-sectional view of the air intake expansion structure 511, based on the existing conventional air intake channel 51 area S, the mesh cross-sectional part is the increased refrigerant flow area S0. The flow area at the connection is increased to increase the size of the gas flow channel. Figure 7 As shown, compared with the present invention, the air intake area is not expanded and the flow area is obviously smaller.

[0066] The scroll compressor of the present invention includes an effective suction channel structure, which can increase the suction channel area, reduce gas pulsation, reduce the vibration excitation of the suction channel to the compressor, and realize the reliable operation of the compressor, thereby improving the suction resistance loss and pulsation noise problems of the high-speed scroll compressor.

[0067] First of all, it should be explained here that “inward” refers to the direction toward the center of the accommodating space, and “outward” refers to the direction away from the center of the accommodating space.

[0068] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0069] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0070] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0073] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An air intake channel structure, characterized in that: It includes an air intake channel arranged on the static scroll disk, one end of the air intake channel is connected to the air intake pipe on the back side of the static scroll disk, and the other end is connected to the air intake cavity on the front profile side of the static scroll disk; it also includes an air intake expansion structure; the air intake expansion structure is arranged at the connection between the air intake channel and the air intake cavity on the front profile side to increase the radial size of the air intake channel and increase the flow area at the connection.

2. The air intake channel structure according to claim 1, characterized in that: The air suction expansion structure includes an arc expansion surface or a smooth curve expansion surface, and the end of the arc expansion surface or the end of the smooth curve expansion surface intersects with the air suction cavity.

3. The air intake channel structure according to claim 1, characterized in that: The air suction expansion structure comprises an inclined linear expansion surface, and the end of the linear expansion surface intersects with the air suction cavity.

4. The air intake channel structure according to claim 2, characterized in that: When the vortex teeth of the static scroll disk are set clockwise, the center of the circular arc extension surface is located in the first, third, and fourth quadrants of the Cartesian coordinate system established with the center of the exhaust hole or on the axis of the horizontal axis; or, the center of the curvature radius corresponding to each point of the smooth curve extension surface is located in the first, third, and fourth quadrants of the Cartesian coordinate system established with the center of the exhaust hole or on the axis of the horizontal axis.

5. The air intake channel structure according to claim 2, characterized in that: When the spiral teeth of the fixed scroll are arranged counterclockwise, the center of the circular arc expansion surface is located within the first, second and third quadrants of the Cartesian coordinate system established with the center of the exhaust hole or on the horizontal coordinate axis; Alternatively, the center of the curvature radius corresponding to each point of the smooth curve extension surface is located within the first, second, and third quadrants of a Cartesian coordinate system established with the center of the exhaust hole or on the horizontal coordinate axis.

6. The air intake channel structure according to claim 3, characterized in that: When the volute of the fixed scroll is arranged in a clockwise direction, the slope of the straight line expansion surface is a positive value.

7. The air intake channel structure according to claim 3, characterized in that: When the volute of the fixed scroll is arranged counterclockwise, the slope of the straight line expansion surface is a negative value.

8. The air intake channel structure according to claim 1, characterized in that: The height h of the air intake expansion structure along the axial direction of the air intake channel satisfies the following formula: 0.21H≤h≤1.85H; wherein H is the height of the volute.

9. A fixed scroll disk, characterized in that: It includes a fixed scroll body, a spiral vortex tooth is arranged on the front side of the fixed scroll body, and an air suction chamber is formed at the tail end of the vortex tooth; an exhaust hole is opened in the center of the vortex tooth; and it also includes an air suction channel structure as described in any one of claims 1-8, which is arranged through the fixed scroll body and connected with the air suction chamber.

10. A scroll compressor, characterized in that: It comprises the fixed scroll plate as claimed in claim 9.

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