Scroll compressor

Abstract

The present application relates to a scroll compressor, which comprises a housing, a compression mechanism arranged in the housing and used for compressing working fluid, a partition plate arranged in the housing and separating an inner space into a low-pressure area in fluid communication with an air inlet of the compression mechanism and a high-pressure area in fluid communication with an air outlet of the compression mechanism, and a heat shield arranged in the low-pressure area and located between the partition plate and the compression mechanism. By adopting the heat shield according to the present application, the high-pressure area and the low-pressure area in the housing can be effectively thermally insulated, and the heat shield is conducive to guiding low-pressure fluid into the air inlet of the compression mechanism to prevent the low-pressure fluid from absorbing heat near the partition plate, further insulating heat transfer from the high-pressure area, improving the efficiency of the scroll compressor, and the heat shield and the scroll compressor of the present application are simple in structure, easy to manufacture and install, and have high cost-effectiveness and practical value.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of compressors, and in particular, to scroll compressors. BACKGROUND

[0002] The contents of this section merely provide background information related to the present disclosure, which can not constitute the prior art.

[0003] Compressors (e.g., scroll compressors, etc.) can be applied in, for example, refrigeration systems, air conditioning systems, and heat pump systems. In the housing of a scroll compressor, a partition plate (sound cover) is usually employed to separate the low-pressure region from the high-pressure region, however, the heat of the high-temperature and high-pressure fluid in the high-pressure region can be transferred to the low-temperature and low-pressure fluid in the low-pressure region via the partition plate, resulting in reduced compressor efficiency. In view of this problem, various heat insulation material components are employed in the prior art to prevent such heat transfer, however, the technical solutions in the prior art are usually complex in structure and difficult to implement or inconvenient for subsequent welding operation of the partition plate, and it is difficult to achieve satisfactory heat insulation effect.

[0004] Therefore, it is necessary to provide an improved scroll compressor, which can achieve better heat insulation effect while facilitating installation operation, and reduce cost. SUMMARY

[0005] In this section, a general summary of the present application is provided, rather than a comprehensive disclosure of the full scope of the present application or all features of the present application.

[0006] It is an object of the present application to provide an improved scroll compressor, which can effectively thermally isolate the high-pressure region and the low-pressure region within the housing of the scroll compressor.

[0007] It is another object of the present application to provide an improved scroll compressor, which can facilitate the flow of low-pressure fluid (i.e., working fluid) into the suction port of the compression mechanism, so as to prevent the low-pressure fluid from absorbing heat near the partition plate, thereby further insulating heat transfer from the high-pressure region, so that the efficiency of the scroll compressor is further improved.

[0008] It is still another object of the present application to provide an improved scroll compressor, which is simple in structure, easy to manufacture and install, and has high cost effectiveness and practical value.

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

[0010] a housing enclosing an internal space;

[0011] a compression mechanism arranged in the housing and configured to compress working fluid;

[0012] a partition plate arranged in the housing and separating the internal space into a low-pressure region in fluid communication with an air inlet of the compression mechanism and a high-pressure region in fluid communication with an air outlet of the compression mechanism; and

[0013] a heat shield arranged in the low-pressure region and located between the partition plate and the compression mechanism.

[0014] According to a preferred embodiment of the present application, the heat shield is substantially annular and comprises a radially outer peripheral portion spaced apart from the housing and / or the partition plate. By spacing the peripheral portion of the heat shield (the welding point of which is closer to the peripheral portion of the partition plate) from the partition plate, the heat shield can be better protected from damage and also facilitates the welding of the partition plate. This greatly reduces the production and installation costs and effectively saves the fitting time of the compressor.

[0015] According to a preferred embodiment of the present application, the peripheral portion comprises a flow guide configured to guide the working fluid towards the air inlet of the compression mechanism.

[0016] According to a preferred embodiment of the present application, the heat shield is a separate component formed independently of the partition plate, and there is a gap between the heat shield and the partition plate in the axial direction. This makes the structure of the heat shield simpler, easier to manufacture and install, and can achieve better heat insulation effect. In particular, since there is a gap between the heat shield and the partition plate in the axial direction, the low-temperature fluid can enter the gap to form a good refrigerant medium, thereby further blocking the heat transfer from the partition plate.

[0017] According to a preferred embodiment of the present application, the heat shield is mounted to the fixed scroll or the partition plate.

[0018] According to a preferred embodiment of the present application, the heat shield further comprises a radially inner peripheral portion, and the heat shield is mounted to the fixed scroll or the partition plate through the inner peripheral portion.

[0019] According to a preferred embodiment of the present application, the inner peripheral portion comprises a flange extending in the axial direction, and the flange is mounted to the fixed scroll or the partition plate.

[0020] According to a preferred embodiment of the present application, the heat shield is a single-layer plate-like member or a double-layer member having a hollow cavity.

[0021] According to a preferred embodiment of the present application, the heat shield with the hollow cavity is provided with an air hole, which fluidly connects the hollow cavity with the low-pressure area. Since the heat shield is hollow inside, a heat insulation cavity is formed, which is filled with low-temperature fluid from the low-pressure area, thereby effectively blocking the heat transfer from the high-pressure area to the low-pressure area via the partition plate.

[0022] According to a preferred embodiment of the present application, the heat shield comprises a stepped portion matching the stepped profile of the outer sidewall of the fixed scroll of the compression mechanism, and the heat shield is supported on the fixed scroll via the stepped portion. The heat shield with such a structure does not need to be fixedly installed, and can be simply seated between the fixed scroll and the partition plate to complete the installation, greatly saving the labor cost and being very convenient to replace.

[0023] According to a preferred embodiment of the present application, the heat shield comprises a metal joint portion made of metal material constituting the inner peripheral portion and a remaining non-metal material portion, and the metal joint portion and the non-metal material portion are integrally formed by injection molding.

[0024] According to a preferred embodiment of the present application, the heat shield is made of a non-metal material with a thermal conductivity coefficient less than or equal to 1.3 W / mK, or a metal material with a thermal conductivity coefficient between 30 W / mK and 50 W / mK.

[0025] In summary, the scroll compressor according to the present application can achieve the following beneficial technical effects: by adopting the heat shield according to the present application, the high-pressure area and the low-pressure area inside the scroll compressor housing can be effectively thermally insulated, and the heat shield is conducive to guiding the low-pressure fluid into the air inlet of the compression mechanism to prevent the low-pressure fluid from absorbing heat near the partition plate, thereby further insulating the heat transfer from the high-pressure area, so that the efficiency of the scroll compressor is further improved, and the heat shield and the scroll compressor comprising the same according to the present application have simple structure, easy to manufacture and install, and have high cost effectiveness and practical value. BRIEF DESCRIPTION OF DRAWINGS

[0026] The foregoing and other features and characteristics of the present application will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings, which illustrate by way of example the principles of the application. The same reference signs are used in the drawings and description to indicate the same or similar components. In the drawings:

[0027] Figure 1 a longitudinal sectional view of a scroll compressor according to a first embodiment of the present application is shown;

[0028] Figure 2 a partial longitudinal sectional view of a scroll compressor in Figure 1 is shown;

[0029] Figure 3 a partial longitudinal sectional view of a scroll compressor according to a second embodiment of the present application is shown;

[0030] Figures 4a to 4c a scroll compressor according to a third embodiment of the present application and a heat shield therein, specifically, Figure 4a a partial longitudinal sectional view of a scroll compressor according to the third embodiment of the present application is shown, Figure 4b a scroll compressor according to the third embodiment of the present application is shown, Figure 4a a perspective view of the heat shield in the scroll compressor, Figure 4c a longitudinal sectional view of the heat shield in the scroll compressor is shown; Figure 4b a longitudinal sectional view of the heat shield in the scroll compressor is shown;

[0031] Figures 5a to 5c a scroll compressor according to a fourth embodiment of the present application and a heat shield therein, specifically, Figure 5a a partial longitudinal sectional view of a scroll compressor according to the fourth embodiment of the present application is shown, Figure 5b a scroll compressor according to the fourth embodiment of the present application is shown, Figure 5a a perspective view of the heat shield in the scroll compressor, Figure 5c a longitudinal sectional view of the heat shield in the scroll compressor is shown; Figure 5b a longitudinal sectional view of the heat shield in the scroll compressor is shown;

[0032] Figures 6a to 6c a scroll compressor according to a fifth embodiment of the present application and a heat shield therein, specifically, Figure 6a a partial longitudinal sectional view of a scroll compressor according to the fifth embodiment of the present application is shown, Figure 6b a scroll compressor according to the fifth embodiment of the present application is shown, Figure 6a a perspective view of the heat shield in the scroll compressor, Figure 6c a longitudinal sectional view of the heat shield in the scroll compressor is shown; Figure 6b a longitudinal sectional view of the heat shield in the scroll compressor is shown;

[0033] Figures 7a to 7b a scroll compressor according to a sixth embodiment of the present application and a heat shield therein, specifically, Figure 7a a perspective view of the heat shield is shown, Figure 7b a longitudinal sectional view of the heat shield in the scroll compressor is shown; Figure 7a a longitudinal sectional view of the heat shield in the scroll compressor is shown; and

[0034] Figure 8 a chart showing the results of a comparative test of a scroll compressor according to the present application and a scroll compressor of the prior art is shown. DETAILED DESCRIPTION

[0035] The present application will be described in detail below with reference to specific embodiments illustrated in the drawings that are intended as non-limiting examples for the purposes of illustration only. Figures 1-8 The present application will be described in detail below with reference to specific embodiments illustrated in the drawings that are intended as non-limiting examples for the purposes of illustration only.

[0036] In the following embodiments, a vertical scroll compressor is taken as an example for the convenience of description. It can be understood that the scroll compressor according to the present application can also be a horizontal scroll compressor or any other suitable type of scroll compressor.

[0037] First, refer to the accompanying drawings Figure 1 The overall configuration of the scroll compressor 100 according to the first embodiment of the present application is described.

[0038] As Figure 1 shown, the scroll compressor 100 can include a housing 10, an electric motor (including a stator 14 and a rotor 15), a drive shaft 16, a main bearing seat 18, an orbiting scroll 24, and a fixed scroll 22. The orbiting scroll 24 and the fixed scroll 22 constitute a compression mechanism CM adapted to compress a working fluid (e.g., refrigerant), wherein the fixed scroll 22 includes a fixed scroll end plate, a fixed scroll wrap, and a discharge port V located at the center of the fixed scroll; the orbiting scroll 24 includes an orbiting scroll end plate, an orbiting scroll wrap, and a hub portion 240, and defines, within the compression mechanism CM, an open suction chamber in fluid communication with a suction port S of the compression mechanism CM, and a series of closed compression chambers formed by the fixed scroll wrap and the orbiting scroll wrap for compressing the working fluid. The rotor 15 is configured to drive the drive shaft 16 to rotate about its rotational axis relative to the housing 10, the orbiting scroll 24 is coupled to and driven by the drive shaft 16 via the hub portion 240, and is able to perform translational rotation (i.e., orbit) relative to the fixed scroll 22 by means of a cross slide ring (i.e., the axis of the orbiting scroll 24 revolves around the axis of the fixed scroll 22, but neither the orbiting scroll 24 nor the fixed scroll 22 rotates about its own axis).

[0039] A partition plate 30 is provided within the housing 10, which is in the shape of a tapered annulus and includes a radially inner peripheral portion 301 close to the discharge port V of the compression mechanism CM and a radially outer peripheral portion 303 close to the outer periphery of the housing 10. The partition plate 30 separates a high-pressure region Al and a low-pressure region A2 inside the housing 10, wherein the low-temperature and low-pressure fluid (i.e., working fluid) to be compressed is delivered into the low-pressure region A2 via a suction pipe 102 on the housing 10, and enters the compression mechanism CM via the suction port S (the approximate position of the suction port S is only schematically indicated in the middle) to be compressed into a high-temperature and high-pressure fluid, and then discharged into the high-pressure region Al via the discharge port V, and delivered to downstream equipment via a discharge pipe 104 for subsequent use. Figure 1

[0040] ​Since heat can be conducted between the high-pressure area A1 with a higher temperature and the low-pressure area A2 with a lower temperature through the partition 30, this can lead to problems such as reduced efficiency of the scroll compressor 100. In order to solve this problem, the present invention provides a heat insulation cover 40 between the partition 30 and the compression mechanism CM—preferably the fixed scroll 22—to block heat from being transferred from the high-pressure area A1 to the low-pressure area A2.

[0041] In general, in the preferred embodiments of the present invention, the heat insulation cover 40 includes heat insulation material, and is preferably made of a non-metallic material with low thermal conductivity, and is preferably constructed as a separate component with a rotating body shape. Compared with the heat insulation coating, interlayer, or membrane structure used in the prior art that is combined with a partition (silencing cover), the heat insulation cover 40 of the present invention has a wider range of material selection and lower material cost, and does not require sealed connection with other components—such as the housing 10, compression mechanism CM, etc., resulting in a simpler structure, easier manufacturing and installation, and better heat insulation performance. The following will refer to the accompanying drawings... Figures 2-7b The preferred embodiments will be described in detail below.

[0042] Figure 2 It shows Figure 1 A partial longitudinal cross-sectional view of the scroll compressor 100 is shown, in which the heat shield 40 is shown more clearly. In this first embodiment, the heat shield 40 is made of a non-metallic material with low thermal conductivity and is generally constructed as a single component having a body-of-rotation shape. Specifically, the heat shield 40 is constructed in an annular shape, including an inner peripheral portion 401 on the radially inward side and an outer peripheral portion 403 on the radially outward side. The inner peripheral portion 401 is sized to form an interference fit with the outer wall of the fixed scroll 22, thereby fixing the heat shield 40 to the fixed scroll 22 as shown, and making the heat shield 40 generally spaced apart from the partition 30, that is, the heat shield 40 is as shown in the figure. Figure 1 and Figure 2The outer peripheral portion 403 of the heat shield 40 is spaced apart from the partition plate 30 in the vertical axial direction of the scroll compressor 100 and in the lateral radial direction of the scroll compressor 100, i.e., the outer peripheral portion 403 of the heat shield 40 is spaced apart from the partition plate 30. In this way, heat in the high-pressure region Al can be better prevented from being transferred to the heat shield 40 via the partition plate 30 and further to the low-pressure region A2. Also, generally, after the heat shield 40 is installed in place, the partition plate 30 (the outer peripheral portion 303) needs to be welded to the housing 10, and due to the high temperature of welding, the heat shield 40 can be damaged. By spacing the heat shield 40 apart from the partition plate 30, particularly spacing the outer peripheral portion 403 of the heat shield 40 (the outer peripheral portion 403 is closer to the welding point of the outer peripheral portion 303 of the partition plate 30) apart from the partition plate 30, the heat shield 40 can be better protected from damage, and the welding of the partition plate 30 is facilitated. In this way, the production and installation costs are greatly reduced, and the assembly time of the compressor is effectively saved.

[0043] Further, the heat shield 40 includes a flat plate-shaped main body 402 extending from the inner peripheral portion 401 to the outer peripheral portion 403 and a flow guide portion 404 constituting the outer peripheral portion 403. Preferably, the flow guide portion 404 is formed in an annular shape and is bent towards the compression mechanism CM, and a portion of the flow guide portion 404 is located axially above the suction port S of the compression mechanism CM, so that the low-temperature and low-pressure fluid from the low-pressure region A2 is better guided towards the suction port S. Most of the low-pressure fluid can directly enter the compression mechanism CM without contacting the partition plate 30, so that heat transfer from the high-pressure region Al to the low-pressure fluid is better blocked, and the compressor efficiency is further improved.

[0044] It should be noted that in the present embodiment, the outer peripheral portion 403 of the heat shield 40 (the outer peripheral portion 403 is closer to the welding point of the outer peripheral portion 303 of the partition plate 30) is spaced apart from the partition plate 30, and it should be understood that this is for the purpose of avoiding the heat near the welding point of the partition plate 30 from damaging the heat shield 40. For the same purpose, preferably, the outer peripheral portion 403 of the heat shield 40 can also be spaced apart from the housing 10, particularly when the outer peripheral portion 403 of the heat shield 40 is located near the welding point of the housing 10 and the partition plate 30.

[0045] Figure 3 A partial longitudinal sectional view of a scroll compressor 100 according to a second embodiment of the present application is shown. The scroll compressor 100 of the second embodiment has substantially the same configuration as the scroll compressor 100 of the first embodiment, and the heat shield 40 in the second embodiment has substantially the same configuration as the heat shield 40 in the first embodiment, i.e., as shown in FIG. 1, the heat shield 40 in the second embodiment is also spaced apart from the partition plate 30 in the vertical axial direction of the scroll compressor 100 and in the lateral radial direction of the scroll compressor 100. Figure 3As shown, the heat shield 40 in the second embodiment is also constructed in an annular shape, including an inner peripheral portion 401 on the radially inner side and an outer peripheral portion 403 on the radially outer side. The difference lies in that, in the scroll compressor 100 of the second embodiment, the heat shield 40 includes a tapered body 402 extending from the inner peripheral portion 401 to the outer peripheral portion 403, and a guide portion 404 constituting the outer peripheral portion 403. The guide portion 404 is formed in an annular shape and bends towards the compression mechanism CM. Specifically, the inner peripheral portion 401 of the heat shield 40 is sized to form an interference fit with the inner peripheral portion 301 of the partition 30 near the exhaust port V of the compression mechanism CM, thereby allowing the heat shield 40 to be mounted as... Figure 3 It is fixed to the partition 30 as shown, and the other parts of the heat shield 40 are spaced apart from the partition 30.

[0046] In this embodiment, only the inner peripheral portion 401 of the heat shield 40 contacts the inner peripheral portion 301 of the partition 30, while the remaining portion is spaced apart from the partition 30. Since the inner peripheral portion 301 of the partition 30 is close to the exhaust port V of the compression mechanism CM and far from the intake port S of the compression mechanism CM, this configuration effectively blocks the conduction of heat from the high-pressure region A1 to the low-pressure fluid. Furthermore, it allows most of the low-pressure fluid to directly enter the compression mechanism CM without contacting the partition 30, thus better preventing heat transfer from the high-pressure region A1 to the low-pressure fluid and further improving compressor efficiency.

[0047] Figures 4a to 4c A scroll compressor 100 according to a third embodiment of the present invention and its heat shield 40 are shown. Specifically, Figure 4a A partial longitudinal cross-sectional view of a scroll compressor 100 according to a third embodiment of the present invention is shown. Figure 4b It shows Figure 4a A three-dimensional view of the heat shield 40 in the middle. Figure 4c It shows Figure 4b The longitudinal cross-sectional view of the heat shield 40 in the third embodiment. The scroll compressor 100 of the third embodiment has a substantially the same configuration as the scroll compressor 100 of the first embodiment, and the heat shield 40 in the third embodiment has a substantially the same configuration as the heat shield 40 in the first embodiment, that is, as shown in the figure. Figures 4a to 4c As shown, the heat shield 40 in the third embodiment is also constructed in an annular shape, including an inner peripheral portion 401 on the radially inner side and an outer peripheral portion 403 on the radially outer side. The difference lies in that, in the scroll compressor 100 of the third embodiment, the heat shield 40 includes a tapered body 402 extending from the inner peripheral portion 401 to the outer peripheral portion 403, and a flow guide 404 constituting the outer peripheral portion 403. The flow guide 404 is formed in an annular shape and bends towards the compression mechanism CM. Specifically, as... Figure 4bAs shown, the inner peripheral portion 401 of the heat shield 40 comprises a flange 4011 extending in the axial direction, the flange 4011 comprises a plurality of buckles 4012 preferably uniformly distributed along the entire flange 4011, correspondingly, the outer side wall of the fixed scroll 22 comprises an annular groove 222, the plurality of buckles 4012 can be buckled into the annular groove 222 so as to fix the heat shield 40 to the fixed scroll 22, and make the heat shield 40 spaced apart from the partition plate 30 as a whole.

[0048] Figures 5a to 5c The scroll compressor 100 according to the fourth embodiment of the present application and the heat shield 40 therein are shown, in particular, Figure 5a A partial longitudinal sectional view of the scroll compressor 100 according to the fourth embodiment of the present application is shown, Figure 5b A perspective view of the heat shield 40 in Figure 5a A longitudinal sectional view of the heat shield 40 in Figure 5c A perspective view of the heat shield 40 in Figure 5b The scroll compressor 100 according to the fourth embodiment of the present application and the heat shield 40 therein are shown, in particular, Figures 5a to 5c As shown, the heat shield 40 in the fourth embodiment is also configured in an annular shape, which comprises an inner peripheral portion 401 on the radially inner side and an outer peripheral portion 403 on the radially outer side, and the heat shield 40 comprises a tapered main body 402 extending from the inner peripheral portion 401 to the outer peripheral portion 403 and a flow guide portion 404 constituting the outer peripheral portion 403, the flow guide portion 404 is formed in an annular shape and is bent towards the compression mechanism CM. The difference lies in that, as shown, Figure 5b As shown, the inner peripheral portion 401 of the heat shield 40 in the fourth embodiment comprises a flange 4011 extending in the axial direction, the inner peripheral surface of the flange 4011 comprises a plurality of convex portions 4014 protruding towards the radially inner side, the plurality of convex portions 4014 are preferably uniformly distributed along the entire flange 4011, the convex portions 4014 preferably have a rib shape as shown in Figure 5b and Figure 5c As shown, the rib has an inclined transition side at the junction with the inner surface of the flange 4011 to facilitate installation, the heat shield 40 is fixed to the fixed scroll 22 by forming an interference fit between the plurality of convex portions 4014 and the outer side wall of the fixed scroll 22, and the heat shield 40 is spaced apart from the partition plate 30 as a whole. By providing an interference fit between the plurality of convex portions 4014 and the outer side wall of the fixed scroll 22, it is easier to better control the size and distribution of the interference force, avoid excessive interference force causing damage to the heat shield 40, and also provide sufficient holding force.

[0049] Although the heat shield 40 in each of the above-described embodiments is made of only a non-metallic material, the present application is not limited thereto. Figures 6a to 6c A scroll compressor 100 according to a fifth embodiment of the present application and a heat shield 40 therein are shown, specifically, Figure 6a A partial longitudinal sectional view of the scroll compressor 100 according to the fifth embodiment of the present application is shown, Figure 6b A perspective view of the heat shield 40 in Figure 6a A longitudinal sectional view of the heat shield 40 in Figure 6c A perspective view of the heat shield 40 in Figure 6b A longitudinal sectional view of the heat shield 40 in. The scroll compressor 100 of the fifth embodiment has substantially the same configuration as the scroll compressor 100 of the first embodiment, and the heat shield 40 in the fifth embodiment has substantially the same configuration as the heat shield 40 in the first embodiment, that is, as shown in Figures 6a to 6c the heat shield 40 in the fifth embodiment is also configured in an annular shape, which includes an inner peripheral portion 401 on a radially inner side and an outer peripheral portion 403 on a radially outer side. The difference is that in the fifth embodiment, the heat shield 40 is composed of a metallic material portion and a non-metallic material portion, specifically, the heat shield 40 includes the inner peripheral portion 401, a flat plate-shaped main body 402, and a flow guide portion 404 constituting the outer peripheral portion 403, wherein the main body 402 and the flow guide portion 404 are made of a non-metallic material, and the inner peripheral portion 401 includes a metallic joint portion 405 made of a metallic material, which is integrally formed with the main body 402 of the non-metallic material by injection molding. The metallic joint portion 405 is configured to form an interference fit with the outer peripheral wall of the fixed scroll 22, thereby fixing the heat shield 40 to the fixed scroll 22 and spacing the heat shield 40 as a whole from the partition plate 30. By employing the above-described structure of the metallic joint portion 405, the installation of the heat shield 40 is made more secure, and at the same time, an excellent heat shielding effect can be achieved.

[0050] In each of the above-described embodiments, the heat shield 40 is in the form of a single-layer plate-shaped member, but the present application is not limited thereto, and the heat shield of the present application can also be configured in the form of a double-layer or multi-layer member having a hollow cavity. Figures 7a to 7b A heat shield 40 in a scroll compressor 100 according to a sixth embodiment of the present application is shown, specifically, Figure 7a A perspective view of the heat shield 40 is shown, Figure 7b A longitudinal sectional view of the heat shield 40 in Figure 7a A longitudinal sectional view of the heat shield 40 in. As shown in Figures 7a to 7b the heat shield 40 in the sixth embodiment is made of a non-metallic material having a low thermal conductivity, and is configured substantially as a single member having a shape of a solid of revolution. Unlike the heat shield 40 of the single-layer material in each of the above-described embodiments, the heat shield 40 in the present embodiment is specifically configured in a hollow capsule-like structure, that is, as shown in Figure 7bAs shown, the longitudinal section of the heat shield 40 presents a double-layer material structure, which includes a hollow cavity. The heat shield 40 includes a radially inner side inner peripheral portion 401 and a radially outer side outer peripheral portion 403, and the heat shield 40 is tapered as a whole from the outer peripheral portion 403 to the inner peripheral portion 401, and includes a first side wall 407 facing the partition plate 30 and a second side wall 408 facing the compression mechanism CM, particularly, the fixed scroll 22, wherein the first side wall 407 is configured to substantially follow the shape of the partition plate 30, and the second side wall 408 is configured to include a stepped portion matching the stepped profile of the outer side wall of the fixed scroll 22 of the compression mechanism CM, thereby enabling the heat shield 40 to be supported on the fixed scroll 22 and substantially fill the space between the partition plate 30 and the fixed scroll 22. Since the heat shield 40 is hollow inside, a heat shield cavity can be formed, thereby effectively blocking the heat transfer from the high-pressure area Al to the low-pressure area A2 via the partition plate 30, and the heat shield 40 of such a structure does not need to be fixedly installed, can be simply seated between the fixed scroll 22 and the partition plate 30 to complete the installation, greatly saving the labor cost, and is very convenient to replace. In addition, it should be understood that such a stepped portion matching the stepped profile of the outer side wall of the fixed scroll 22 of the compression mechanism CM can also be combined with other embodiments of the present application, thereby more conveniently installing the heat shield.

[0051] In addition, preferably, in the present embodiment, the heat shield 40 further includes a plurality of air holes 409 respectively provided in the second side wall 408 and the bottom wall 410. The air holes 409 communicate the hollow cavity inside the heat shield 40 with the low-pressure area A2, thereby preventing the heat shield 40 from being crushed due to the pressure difference between the inside and outside of the heat shield 40. It should be understood that the air holes 409 can be provided at any part of the heat shield 40, for example, can be provided in the bottom wall 410 and / or the first side wall 407 of the heat shield 40, as long as the communication between the inside and outside of the heat shield 40 can be achieved. Preferably, the air holes 409 are provided away from the suction port S of the compression mechanism CM to avoid affecting the low-pressure fluid entering the suction port S, more preferably, the air holes 409 are provided in the second side wall 408, thereby being able to be away from the partition plate 30 to avoid the heat radiation from the partition plate 30 entering the heat shield 40, while being able to avoid the suction port S.

[0052] The above embodiments specifically describe the fitting relationship between the heat shield 40 and the fixed scroll 22 and the partition plate 30 of the compression mechanism CM, however, it should be understood that the present application is not limited thereto, and the heat shield according to the present application can be fixed to the housing 10, the fixed scroll of the compression mechanism CM, the partition plate 30, etc. by any suitable means such as screwing, riveting, interference fit, snap fit, welding, adhesion, etc. When the heat shield is fixed to the partition plate 30, as described above, preferably, the fixing points thereof are away from the welding points of the partition plate 30 to protect the heat shield from damage; when the heat shield is fixed to the housing 10, likewise, the fixing points thereof are away from the welding points between the partition plate 30 and the housing 10 to protect the heat shield from damage.

[0053] Further, although the heat shield 40 in each of the above embodiments is in the shape of a revolution body, the present application is not limited thereto. Although it can not be preferred, it should be understood that the heat shield of the present application can also be implemented in a shape other than a revolution body, i.e. in a circumferential non-closed ring structure such as a sector shape, etc., and the heat shield of the present application can have various different shapes depending on the actual application. In particular, as to the flow guide portion 402, likewise, although the flow guide portion 402 in each of the above embodiments is formed in a ring shape along the entire outer peripheral portion 403 of the ring-shaped heat shield 40, i.e. the flow guide portion 402 is configured to the entire outer peripheral portion 403, it should be understood that the flow guide portion 402 can also be formed only to a part of the outer peripheral portion 403 of the heat shield 40, e.g. the flow guide portion 402 can be formed only at a position of the heat shield 40 corresponding to the suction port S of the compression mechanism CM to guide the flow only with respect to the suction port S. Similar variations can be implemented based on the foregoing disclosure and the design concept of the present application.

[0054] Figure 8 A chart showing the comparative test results of the scroll compressor 100 according to the present application and the scroll compressor of the prior art is shown. Specifically, the scroll compressor 100 in the foregoing first embodiment of the present application and the scroll compressor of the prior art were operated under the same operating conditions to perform the comparative experiment.

[0055] In Chart 8, the two bars of the horizontal axis respectively represent the scroll compressor 100 of the present application and the scroll compressor of the prior art, and the vertical axis "DLT" represents the numerical value of the discharge line temperature. The experimental results show that the scroll compressor 100 employing the heat shield 40 of the present application makes the discharge line temperature drop by 8°F compared to the scroll compressor of the prior art. This indicates that the heat shield 40 of the present application can significantly insulate the heat conduction from the high-pressure region A2 to the low-pressure region A1, thereby making the discharge line temperature drop and improving the compressor efficiency.

[0056] While the application has been described with reference to the example embodiments thereof, it is to be understood that the application is not limited to the example embodiments or constructions described and illustrated, that the application that the application includes any modifications or equivalents of the example embodiments along with any further modifications that come within the scope of the claims.

Claims

1. A scroll compressor (100), the scroll compressor comprising: A housing (10) that encloses an internal space; A compression mechanism (CM) is disposed in the housing and is used to compress the working fluid; A partition (30) is disposed in the housing and divides the internal space into a low-pressure region (A2) in fluid communication with the air inlet (S) of the compression mechanism and a high-pressure region (A1) in fluid communication with the exhaust port (V) of the compression mechanism. as well as A heat shield (40) is disposed in the low-pressure area and located between the partition and the compression mechanism. The heat shield is generally annular and includes a radially outer peripheral portion (403). The outer peripheral portion (403) includes a flow guide (404) configured to guide the working fluid toward the air inlet (S) of the compression mechanism.

2. The scroll compressor according to claim 1, characterized in that, The outer peripheral portion is spaced apart from the housing and / or the partition.

3. The scroll compressor according to claim 1, characterized in that, The heat shield is a separate component formed independently of the partition, and there is a gap between the heat shield and the partition in the axial direction.

4. The scroll compressor according to claim 2, characterized in that, The heat shield is installed on the fixed vortex of the compression mechanism or the partition.

5. The scroll compressor according to claim 4, characterized in that, The heat shield also includes an inner peripheral portion (401) on the radially inner side, through which the heat shield is mounted to the fixed vortex or the partition.

6. The scroll compressor according to claim 5, characterized in that, The inner peripheral portion includes a flange (4011) extending in the axial direction, the flange being mounted to the fixed vortex or the partition.

7. The scroll compressor according to claim 2, characterized in that, The heat insulation cover is a single-layer plate-like component or a double-layer component with a hollow cavity.

8. The scroll compressor according to claim 7, characterized in that, The heat insulation cover having the hollow cavity is provided with vents (409), which fluidly connect the hollow cavity to the low-pressure area.

9. The scroll compressor according to any one of claims 1-3 and 7-8, characterized in that, The heat shield includes a stepped portion that matches the stepped profile of the outer sidewall of the fixed vortex of the compression mechanism, and the heat shield is supported on the fixed vortex by the stepped portion.

10. The scroll compressor according to claim 5, characterized in that, The heat shield includes a metal joint (405) made of a metallic material constituting the inner peripheral portion and the remaining non-metallic material portion, the metal joint and the non-metallic material portion being integrally formed by injection molding.

11. The scroll compressor according to any one of claims 1-8, characterized in that, The heat shield is made of a non-metallic material with a thermal conductivity of less than or equal to 1.3 W / mK, or of a metallic material with a thermal conductivity between 30 W / mK and 50 W / mK.

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