CN216617898U - Heat shield and scroll compressor - Google Patents

Abstract

The utility model discloses a heat shield and a scroll compressor. A heat shield is arranged between a first air suction port of a casing of the scroll compressor and a second air suction port of the fixed scroll, and the heat shield is provided with a flow guide channel for guiding working medium to the through port. Contact between the high temperature refrigerant of motor chamber department through separating the heat exchanger and the low temperature refrigerant in the drainage channel reduces the heat transfer between high temperature refrigerant and the low temperature refrigerant, separates the heat exchanger simultaneously and can directly introduce the second suction inlet department with the low temperature refrigerant of first suction inlet department, both shortens the stroke of low temperature refrigerant, shortens the time of heat transfer again to improve scroll compressor's work efficiency.

Description

Heat shield and scroll compressor

Technical Field

The utility model relates to the technical field of compressors, in particular to a heat shield and a scroll compressor with the same.

Background

The scroll compressor is generally applied to a refrigeration system or a heat pump system, and the scroll compressor comprises a compression mechanism for compressing a working medium (such as a refrigerant), the compression mechanism comprises an orbiting scroll part and a fixed scroll part, the working medium enters the compression mechanism through an air suction pipe and a fixed scroll air suction port, and there is relative movement between the orbiting scroll part and the fixed scroll part to compress the working medium. In the related art, when the scroll compressor is a low back pressure type scroll compressor, the compressor of the above structure has a relatively low operation efficiency.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a heat shield, aiming at improving the working efficiency of a scroll compressor.

The utility model also provides a scroll compressor with the heat shield.

The heat shield comprises a plate main body, wherein the plate main body is provided with a through hole, the plate main body is provided with a drainage channel used for guiding working media to the through hole, and the bottom wall of the drainage channel forms a drainage structure.

The heat shield according to the embodiment of the utility model has at least the following beneficial effects: a heat shield having a flow guide passage for guiding refrigerant to the through port is provided between a first suction port of a casing of the scroll compressor and a second suction port of the fixed scroll. Contact between the high temperature refrigerant of motor chamber department through separating the heat exchanger and the interior low temperature refrigerant of drainage channel reduces the heat transfer between high temperature refrigerant and the low temperature refrigerant, separates the heat exchanger simultaneously and can directly introduce the second suction inlet department with the low temperature refrigerant of first suction inlet department, both shortens the stroke of low temperature refrigerant, shortens the time of heat transfer again to improve scroll compressor's work efficiency.

According to some embodiments of the utility model, the bottom wall is provided with an oil return hole.

According to some embodiments of the utility model, the bottom wall and the vertical surface have an angle λ 4 satisfying: lambda 4 is more than 0 degree and less than 90 degrees; or the included angle lambda 6 between the top wall of the drainage channel and the vertical surface meets the following requirements: λ 6 is more than or equal to 60 degrees and less than or equal to 150 degrees; or the included angle lambda 3 of the two side walls of the drainage channel satisfies the following conditions: lambda 3 is more than or equal to 0 degree and less than 90 degrees; or the thickness T1 of the side plate, the thickness T2 of the drainage plate and the thickness T3 of the top plate satisfy: t1 is not less than T2 is not less than T3.

According to some embodiments of the utility model, the heat shield is made of ceramic or plastic.

The scroll compressor according to the second aspect of the present invention comprises a casing, a fixed scroll, and the heat shield according to the first aspect of the present invention, wherein the casing is opened with a first air suction port provided with an air suction pipe; the fixed scroll is arranged in the shell and is provided with a second air suction port; the heat insulation cover is arranged in the machine shell and positioned between the first air suction port and the second air suction port, and the through port is arranged corresponding to the second air suction port.

The scroll compressor provided by the embodiment of the utility model has at least the following beneficial effects: through adopting foretell heat exchanger that separates, improve scroll compressor's work efficiency.

According to some embodiments of the present invention, the planes of the two side walls of the second suction opening are a first plane and a second plane respectively, the first plane and the second plane form a first area, and an included angle λ 1 of the first area satisfies: λ 1 is more than or equal to 30 degrees and less than or equal to 90 degrees, and the air suction pipe is positioned in the first area.

According to some embodiments of the utility model, the planes of the two side walls of the drainage channel are respectively a third plane and a fourth plane, the third plane and the fourth plane form a second area, and an included angle λ 3 of the second area satisfies: 0 DEG ≦ λ 3 < 90 DEG, there being an overlapping region of the first region and the second region, the overlapping region having an included angle λ 2 satisfying: 0.8 lambda 3 is more than or equal to lambda 2 is more than or equal to lambda 3 is more than or equal to lambda 1, and the air suction pipe is positioned in the overlapping area.

According to some embodiments of the utility model, the axial length d3 of the bottom wall of the drainage channel satisfies: d is not less than D3 and not more than 3D, and D is the minimum inner diameter of the air suction pipe.

According to some embodiments of the utility model, a radial distance d4 from the inner end of the top wall of the drainage channel to the top of the bottom wall satisfies: d4 is more than or equal to 0 and less than or equal to d3tan lambda 4, and lambda 4 is an included angle between the bottom wall and the vertical surface.

According to some embodiments of the utility model, the minimum width d1 of the heat shield satisfies: d1 is more than or equal to pi D/4sin lambda 4.

According to some embodiments of the present invention, the bottom wall is opened with an oil return hole, and a radius r1 of the oil return hole satisfies: r1 is more than 0 and less than d 1/2; or the axial distance d7 from the oil return hole to the lowest point of the first air suction port satisfies the following condition: d7 is more than 0 and less than or equal to D.

According to some embodiments of the utility model, the minimum value of the axial length of the through port is d5, the minimum value of the axial length of the second suction port is d2, and the minimum value d6 of the axial distance from the top wall to the bottom of the second suction port satisfies: d6 is more than or equal to d5 and is more than or equal to 0.8d 2.

According to some embodiments of the utility model, the heat shield is bonded or welded to the casing, and the heat shield and the fixed scroll are integrally formed or fixedly connected through a screw member or a snap structure.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the following figures and examples, in which:

FIG. 1 is a perspective view of a heat shield according to an embodiment of the present invention;

FIG. 2 is a perspective view of the heat shield of FIG. 1 from another perspective;

FIG. 3 is a schematic front view of the heat shield of FIG. 1;

FIG. 4 is a schematic top view of the heat shield shown in FIG. 1;

FIG. 5 is a schematic cross-sectional view taken at A-A in FIG. 3;

FIG. 6 is a schematic cross-sectional view taken at B-B of FIG. 5;

FIG. 7 is a schematic cross-sectional view of a scroll compressor along its axial direction according to an embodiment of the present invention;

FIG. 8 is an enlarged fragmentary view of the scroll compressor shown in FIG. 7 at I;

FIG. 9 is a cross-sectional view of the scroll compressor shown in FIG. 7 taken perpendicular to the axial direction and at the second suction port.

Reference numerals:

a compressor 10;

the heat shield 100, the drainage plate 110, the coaming 120, the top plate 121, the side plate 122, the through hole 130 and the oil return hole 140;

a casing 200, a first suction port 210, a suction pipe 220;

a compression element 300, a fixed scroll 310, a second suction port 311, a orbiting scroll 320;

a main frame 400;

a motor 500;

crankshaft 600.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the positional or orientational descriptions referred to, for example, the upper, lower, top, bottom, axial, radial, etc. indications are positional or orientational relationships based on those shown in the drawings, and are for convenience of description and simplicity of description only, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

If there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

A heat shield 100 and a compressor 10 provided according to some embodiments of the present invention are described below with reference to fig. 1-9.

The heat shield 100 includes a plate body having a square through-port 130, the plate body having a flow-leading passage for leading a working substance (e.g., refrigerant) to the through-port 130, a bottom wall of the flow-leading passage having a flow-leading structure.

Specifically, referring to fig. 1 to 2, the heat shield 100 is substantially funnel-shaped, the heat shield 100 is installed in the casing 200 of the compressor 10, the through-hole 130 penetrates both end surfaces of the plate body in the thickness direction of the plate body, the through-hole 130 is quadrangular, the heat shield 100 includes a surrounding plate 120 and a flow guide plate 110, referring to fig. 7 to 8, the bottom of the flow guide plate 110 is installed at the first suction port 210 of the casing 200 of the scroll compressor 10, and the through-hole 130 is provided corresponding to the second suction port 311 of the fixed scroll 310.

Referring to fig. 1-2, the through opening 130 is a quadrangle, and the surrounding plate 120 is in an open loop shape, such as Contraband shape, so that the structure is simple, the structure of the mold can be simplified, and the cost can be reduced. It should be noted that the through opening 130 may have other shapes, such as a circular shape or an oval shape, and the shroud 120 has a corresponding arc shape. The shroud 120 is disposed around the through opening 130 and has a cutout where the drainage plate 110 is disposed and extends in a direction away from the through opening 130. The surrounding plate 120 and the drainage plate 110 form a drainage channel for guiding the working medium to the through opening 130, and the drainage plate 110 is a bottom wall of the drainage channel.

The flow guide plate 110 can directly guide the low-temperature refrigerant at the first suction port 210 to the second suction port 311, and the enclosure plate 120 can limit the flow path of the low-temperature refrigerant, so that the low-temperature refrigerant can only flow to the through port 130, and thus the enclosure plate 120 and the flow guide plate 110 form a flow guide channel for guiding the working medium to the through port 130.

The contact between the high-temperature refrigerant at the motor cavity of the scroll compressor 10 and the low-temperature refrigerant in the drainage channel is blocked by the heat shield 100, so that the heat transfer between the high-temperature refrigerant and the low-temperature refrigerant is reduced, meanwhile, the low-temperature refrigerant at the first air suction port 210 can be directly introduced into the second air suction port 311 by the heat shield 100, the stroke of the low-temperature refrigerant is shortened, the heat transfer time is shortened, and the working efficiency of the scroll compressor 10 is improved.

After a lot of experiments, it is found that there is a variation in COP (coefficient of performance) of the scroll compressor 10 in which the heat shield 100 is provided and the heat shield 100 is not provided, where COP refers to an energy efficiency level under a corresponding working condition, as shown in table 1 below, and thus it is clear that the heat shield 100 provided by the present invention can actually improve the working efficiency of the scroll compressor 10, and the energy efficiency of the scroll compressor 10 is improved. Therefore, by designing the positional characteristic parameters and dimensional characteristic parameters of the flow-guiding plate 110, the shroud plate 120, the top plate 121, the side plate 122, the through-hole 130, and the oil return hole 140 of the heat shield 10 within appropriate ranges, the level of energy efficiency of the scroll compressor 10 can be improved.

TABLE 1 results of the experiment

Specifically, as shown in fig. 3 and 5, in some embodiments of the present invention, the flow guide plate 110 is disposed below the through-port 130, and the upper edge of the flow guide plate 110 is the bottom wall of the through-port 130, the angle between the flow guide plate 110 and the vertical plane is defined as λ 4, i.e., the horizontal inclination angle of the flow guide plate 110 is 90 ° - λ 4, and the value of λ 4 may be, for example, 0 ° < λ 4 < 90 °, preferably 20 ° < λ 4 < 45 °, and the flow guide plate 110 is provided as an inclined plate that is inclined upward and toward the second suction port 311, and the inclined plate can further shorten the flow distance of the low-temperature refrigerant from the first suction port 210 to the second suction port 311, thereby further shortening the stroke of the low-temperature refrigerant and further shortening the time for heat transfer.

Specifically, as shown in fig. 3 and 5, in some embodiments of the present invention, a semicircular oil return hole 140 is formed at a middle position of the bottom of the flow guide plate 110. Specifically, the oil return hole 140 is disposed at a middle position of the bottom of the flow guide plate 110, so that the lubricating oil in the low-temperature refrigerant can return to the bottom of the machine casing 200. It should be noted that the oil return hole 140 may also have other shapes, such as a semi-square shape or a semi-oval shape, and is not limited herein.

Specifically, as shown in fig. 1 and 2, in some embodiments of the present invention, the enclosure 120 includes a top plate 121, the top plate 121 is located above the through opening 130, the top plate 121 is a top wall of the drainage channel, and the top plate 121 prevents the refrigerant from flowing upward.

Specifically, as shown in FIG. 5, in some embodiments of the present invention, the angle between the top plate 121 and the vertical plane is defined as λ 6, which may range, for example, from 60 ≦ λ 6 ≦ 150, preferably from 80 ≦ λ 6 ≦ 100, and the top plate 121 is capable of not only preventing the refrigerant from flowing upward but also directing the refrigerant toward the through-ports 130.

Specifically, as shown in fig. 1 and 2, in some embodiments of the present invention, the enclosing plate 120 further includes two side plates 122, the two side plates 122 are respectively located at left and right sides of the through hole 130, two ends of the top plate 121 are connected to upper ends of the two side plates 122, two ends of the drainage plate 110 are respectively connected to lower ends of the two side plates 122, the two side plates 122 are two side walls of the drainage channel, and the top plate 121 and the two side plates 122 can surround the drained low-temperature refrigerant, so that the low-temperature refrigerant can only flow to the through hole 130, and the structure is simple and the manufacturing is convenient.

Specifically, as shown in FIGS. 1-2 and 6, in some embodiments of the present invention, the plane of one of the two side plates 122 is a third plane, the plane of the other side plate 122 is a fourth plane, and the angle between the third plane and the fourth plane is defined as λ 3, i.e., the angle between the two side plates 122 is equal to λ 3, which can be, for example, 0 ° ≦ λ 3 ≦ 90 °, and λ 3 is 0 °, the two side plates 122 are parallel to each other, preferably 30 ° ≦ λ 3 ≦ 40 °, so that the two side plates 122 can not only prevent the refrigerant from flowing to both sides, but also guide the refrigerant phase through port 130 to flow.

Specifically, as shown in FIGS. 5 and 6, in some embodiments of the present invention, the thickness of the side panel 122 is defined as T1, the thickness of the drainage plate 110 is defined as T2, and the thickness of the top panel 121 is defined as T3, which may be, for example, T1 ≦ T2 ≦ T3, e.g., T1 may be 1.5 mm, T2 may be 1.5 mm, and T3 may be 1.5 mm.

Specifically, in some embodiments of the present invention, the heat shield 100 is made of a non-metallic heat insulating material, such as ceramic or plastic, which has good heat insulating effect and low cost. It should be noted that in other embodiments, the heat shield 100 may not be made of heat insulating material, but rather, a heat insulating layer may be provided on the sheet material.

Specifically, in some embodiments of the present invention, the heat shield 100 is a one-piece member, such as a one-piece injection molded member, which is easy to manufacture and easy to mass produce.

Referring to fig. 7 to 9, the scroll compressor 10 according to the embodiment of the second aspect of the present invention includes a casing 200, a fixed scroll 310 and the heat shield 100 according to any of the embodiments of the first aspect of the present invention, the casing 200 defines a first suction port 210, and the casing 200 has a suction pipe 220 mounted at the first suction port 210; the fixed scroll 310 is disposed inside the casing 200, and the fixed scroll 310 is provided with a second suction port 311; the heat shield 100 is provided in the casing 200 between the second inlet 311 and the first inlet 210, and the through-port 130 is provided corresponding to the second inlet 311 of the fixed scroll 310.

Specifically, the scroll compressor 10 is a vertical scroll compressor 10, and includes a casing 200, a compression assembly 300, a heat shield 100, a main frame 400 fixed inside the casing 200, a motor 500 and a crankshaft 600, wherein a rotor of the motor 500 is fixedly connected to the crankshaft 600, the motor 500 drives the crankshaft 600 to rotate, the compression assembly 300 is located above the motor 500, and since the motor 500 generates heat during operation, the temperature of refrigerant around the motor 500 is relatively high.

The compression assembly 300 includes a movable scroll 320 and a fixed scroll 310, the fixed scroll 310 is connected to the main frame 400, the fixed scroll 310 includes a fixed scroll body and a fixed wrap, the fixed scroll body is formed with a back pressure hole, the movable scroll 320 is connected to the crankshaft 600, the crankshaft 600 drives the movable scroll 320 to rotate relative to the fixed scroll 310, a plurality of compression chambers are formed between the movable scroll 320 and the fixed scroll 310, of the plurality of compression chambers, a compression chamber adjacent to the second suction port 311 has a minimum pressure, a compression chamber adjacent to the discharge port from which the refrigerant is discharged has a maximum pressure, and a pressure of the compression chamber located between the two compression chambers is an intermediate pressure between a suction pressure of the second suction port 311 and a discharge pressure of the discharge port. The scroll compressor 10 further includes a back pressure chamber which applies an intermediate pressure to the fixed scroll 310 through a back pressure hole to press the fixed scroll 310 toward the orbiting scroll 320.

First suction port 210 and second suction port 311 are located the same one side of the axis of scroll compressor 10, be equipped with in the scroll compressor 10 and separate heat exchanger 100, contact between the high temperature refrigerant of motor chamber department and the cryogenic refrigerant in the drainage channel through separating heat exchanger 100, reduce the heat transfer between high temperature refrigerant and the cryogenic refrigerant, separate heat exchanger 100 simultaneously and can directly introduce second suction port 311 department with the cryogenic refrigerant of first suction port 210 department, both shorten cryogenic refrigerant's stroke, shorten the time of heat transfer again, thereby improve the work efficiency of scroll compressor 10.

Specifically, as shown in fig. 9, in some embodiments of the present invention, the second suction port 311 has two side walls, one of the two side walls is a first plane, the other side wall is a second plane, and an included angle between the second plane and the first plane is defined as λ 1, which may be, for example, 30 ° ≦ λ 1 ≦ 90 °, and the suction pipe 220 is located between the second plane and the first plane, so that the circumferential distance between the first suction port 210 and the second suction port 311 is shortened, thereby shortening the stroke of the low-temperature refrigerant and simplifying the structure of the flow guide plate 110, so that the flow guide plate 110 is substantially in the shape of an inclined plate.

Specifically, as shown in fig. 9, in some embodiments of the present invention, the enclosure 120 includes two side plates 122, the two side plates 122 are respectively located at two sides of the through opening 130, a plane of one of the two side plates 122 is a third plane, a plane of the other side plate 122 is a fourth plane, an included angle between the fourth plane and the third plane is defined as λ 3, which may range from 0 ° ≦ λ 3 ≦ 90 °, for example, the second plane and the first plane form a first region, the fourth plane and the third plane form a second region, the second region and the first region have an overlapping region, an included angle between the overlapping regions is defined as λ 2, a relationship between the three may range from 0.8 λ 3 ≦ λ 2 ≦ λ 3 ≦ λ 1, for example, and the suction pipe 220 is located in the overlapping region, such that a circumferential distance between the first suction pipe 210 and the second suction pipe 311 is shortest, thereby not only making a stroke of the low-temperature refrigerant shorter, and also reduces the heat transfer time, thereby improving the operating efficiency of the scroll compressor 10.

Specifically, referring to fig. 9, the cross section of the scroll compressor 10 is taken along the direction perpendicular to the axis of the fixed scroll 310 and at the through hole 130, in the cross section, the second suction port 311 has two first side walls and second side walls which are oppositely arranged, the straight line of the first side wall is a first straight line, the straight line of the second side wall is a second straight line, the included angle between the first straight line and the second straight line is λ 1, and the projection of the suction pipe 220 on the cross section is located between the first straight line and the second straight line. Further, the straight lines where the two side plates 122 are located are a third straight line and a fourth straight line, respectively, an included angle between the third straight line and the fourth straight line is equal to λ 3, the third straight line and the fourth straight line form a second surface area, the first straight line and the second straight line form a first surface area, the first surface area and the second surface area have an overlapping surface area, an included angle between the overlapping surface areas is equal to λ 2, the projection of the air suction pipe 220 on the cross section is located in the overlapping surface area, and a circumferential distance between the first air suction port 210 and the second air suction port 311 is shortest,

specifically, as shown in FIG. 5, in some embodiments of the present invention, the minimum inner diameter of the suction duct 220 is defined as D, and the axial length of the flow guide plate 110 is defined as D3, and the relationship between the two may be, for example, D3 3D. Specifically, the suction pipe 220 is a stepped circular pipe, the small diameter portion is disposed closer to the first suction port 210 than the large diameter portion, d3 is a distance from the top of the flow guide plate 110 to the bottom of the flow guide plate 110 in the axial direction, and the flow guide channel has a certain volume to ensure that the flow rate and pressure of the refrigerant reaching the second suction port 311 meet preset values.

It should be noted that the term "axial distance" as used herein and hereinafter refers to the length of the projection of the line connecting two points in the axial direction of the scroll compressor 10.

Specifically, as shown in FIG. 4, in some embodiments of the present invention, the radial distance from the inner end surface of the top plate 121 to the top of the flow-guiding plate 110 is defined as d4, which satisfies 0. ltoreq. d 4. ltoreq. d3tan λ 4, where λ 4 is the included angle between the flow-guiding plate 110 and the vertical plane, and may be, for example, 0 ° < λ 4 < 90 °, to ensure the flow rate of the refrigerant at the second suction port 311.

It should be noted that the "radial distance" appearing here and below refers to a length of a projection of a line connecting two points in a radial direction of the fixed scroll 310.

Specifically, as shown in FIG. 6, in some embodiments of the utility model, the minimum width of the heat shield 100 is defined as d1, which is satisfied

D is the minimum inner diameter of the suction pipe 220, and λ 4 is the angle between the flow guide plate 110 and the vertical plane, and the range of the angle may be, for example, 0 ° < λ 4 < 90 °, so as to ensure the flow rate of the refrigerant at the second suction port 311.

Specifically, as shown in fig. 3 and 8, in some embodiments of the present invention, the shroud 120 includes a top plate 121, the top plate 121 is located above the through port 130, a minimum value of an axial distance between a bottom end surface of the top plate 121 and a top portion of the flow-guiding plate 110 is defined as d5, that is, a minimum value of an axial length of the through port 130 is equal to d5, a minimum value of an axial distance between a top portion of the second suction port 311 and a bottom portion of the second suction port 311 is defined as d2, that is, a minimum value of an axial length of the second suction port 311 is equal to d2, and a minimum value of an axial distance between a bottom end surface of the top plate 121 and a bottom portion of the second suction port 311 is defined as d6, which is satisfied that 0.8d2 ≦ d6 ≦ d5, to ensure a flow rate of the refrigerant at the second suction port 311.

Specifically, as shown in fig. 6, in some embodiments of the present invention, a semicircular oil return hole 140 is formed in the middle of the bottom of the flow guide plate 110, the radius of the oil return hole 140 is defined as r1, and it is required to satisfy 0 < r1 < d1/2, where d1 is the minimum width of the heat shield 100, so as to reduce the flow rate of the refrigerant flowing through the oil return hole 140 to the motor cavity.

Specifically, as shown in fig. 8, in some embodiments of the present invention, the axial distance from the oil return hole 140 to the lowest point of the first suction port 210 is defined as D7, which satisfies 0 < D7 ≦ D, where D is the minimum inner diameter of the suction pipe 220, which not only reduces the flow rate of the refrigerant flowing to the motor cavity through the oil return hole 140, but also improves the oil return rate.

Specifically, in some embodiments of the present invention, the heat shield 100 is fixedly connected to the casing 200, for example, the bottom of the heat shield 100 is bonded (e.g., glued) or welded to the inner peripheral wall of the casing 200, and the bottom of the flow guide plate 110 is lower than the first air suction opening 210, and the oil return hole 140 is also lower than the first air suction opening 210; the top of the heat shield 100 is fixedly connected to the outer peripheral wall of the fixed scroll 310, for example, the heat shield 100 and the fixed scroll 310 are integrally formed, or the heat shield 100 and the fixed scroll 310 are fixedly connected by a screw (for example, a screw) or a snap structure. Preferably, the heat shield 100 is integrally formed with the fixed scroll 310, and when the heat shield 100 is a separate component, it needs to be connected to the fixed scroll 310 through an additional connecting or assembling process, which makes the assembly of the scroll compressor 10 complicated and reduces the production efficiency. The heat shield 100 and the fixed scroll 310 are usually connected by a snap fit, a screw fit, or the like as in the prior art, but due to the inherent defects of these connection methods, the structural strength of the connection portion between the heat shield 100 and the fixed scroll 310 is not high, and the heat shield 100 is easily detached from the fixed scroll 310 during use, which causes inconvenience in use of the scroll compressor 10. When the heat shield 100 and the fixed scroll 310 are integrally formed, the heat shield 100 and the fixed scroll 310 are no longer independent components, and no other connecting or assembling process is required for connecting the heat shield 100 and the fixed scroll 310. This can improve the structural accuracy of the heat shield 100 and the fixed scroll 310, and avoid a large assembly error. To improve the structural strength of the heat shield 100, side flaps (not shown) or ribs (not shown) can be provided on the flow guide plate 100.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The present invention is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.

Claims (12)

1. A heat shield, comprising:

the plate body is provided with a through hole, the plate body is provided with a drainage channel for guiding working media to the through hole, and the bottom wall of the drainage channel forms a drainage structure; the bottom wall is provided with an oil return hole.

2. The heat shield of claim 1, wherein the bottom wall includes an angle λ 4 with a vertical plane that satisfies: lambda 4 is more than 0 degree and less than 90 degrees; or the included angle lambda 6 between the top wall of the drainage channel and the vertical surface meets the following requirements: λ 6 is more than or equal to 60 degrees and less than or equal to 150 degrees; or the included angle lambda 3 of the two side walls of the drainage channel satisfies the following conditions: lambda 3 is more than or equal to 0 degree and less than 90 degrees; alternatively, the thickness T1 of the side wall of the drainage channel, the thickness T2 of the bottom wall and the thickness T3 of the top wall of the drainage channel satisfy: t1 is not less than T2 is not less than T3.

3. The heat shield of any of claims 1-2, wherein the heat shield is made of ceramic or plastic.

4. A scroll compressor, comprising:

the air conditioner comprises a shell, a first air inlet and a second air inlet, wherein the shell is provided with the first air inlet;

the fixed scroll is arranged in the shell and provided with a second air suction port;

a heat shield according to any one of claims 1 to 3, said heat shield being located within said housing between said first suction opening and said second suction opening, said through opening being located in correspondence with said second suction opening.

5. The scroll compressor of claim 4, wherein the two side walls of the second suction port are located on a first plane and a second plane, respectively, the first plane and the second plane form a first area, and an included angle λ 1 of the first area satisfies: λ 1 is more than or equal to 30 degrees and less than or equal to 90 degrees, and the air suction pipe is positioned in the first area.

6. The scroll compressor of claim 5, wherein the planes of the two side walls of the flow-guiding channel are respectively a third plane and a fourth plane, the third plane and the fourth plane form a second area, and an included angle λ 3 of the second area satisfies: 0 DEG ≦ λ 3 < 90 DEG, there being an overlapping region of the first region and the second region, the overlapping region having an included angle λ 2 satisfying: 0.8 lambda 3 is more than or equal to lambda 2 is more than or equal to lambda 3 is more than or equal to lambda 1, and the air suction pipe is positioned in the overlapping area.

7. The scroll compressor of claim 6, wherein the axial length d3 of the bottom wall of the drainage passage satisfies: d is not less than D3 and not more than 3D, and D is the minimum inner diameter of the air suction pipe.

8. The scroll compressor of claim 7, wherein a radial distance d4 from the inner end of the top wall of the drainage channel to the top of the bottom wall satisfies: d4 is more than or equal to 0 and less than or equal to d3tan lambda 4, and lambda 4 is an included angle between the bottom wall and the vertical surface.

9. The scroll compressor of claim 8, wherein the minimum width d1 of the heat shield satisfies:

10. the scroll compressor of claim 9, wherein the bottom wall defines an oil return hole, and a radius r1 of the oil return hole satisfies: r1 is more than 0 and less than d 1/2; or the axial distance d7 from the oil return hole to the lowest point of the first air suction port satisfies the following condition: d7 is more than 0 and less than or equal to D.

11. The scroll compressor of claim 8, wherein the minimum value of the axial length of the through-port is d5, the minimum value of the axial length of the second suction port is d2, and the minimum value of the axial distance d6 from the top wall to the bottom of the second suction port satisfies: d6 is more than or equal to d5 and is more than or equal to 0.8d 2.

12. The scroll compressor of any one of claims 4 to 11, wherein the heat shield is bonded or welded to the casing, and the heat shield is integrally formed with the fixed scroll or fixedly connected thereto by a screw or a snap.

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