CN115681138A - Scroll compressor having a discharge port for discharging refrigerant from a discharge chamber - Google Patents

Abstract

The present invention relates to a scroll compressor, which comprises: a housing; a compression mechanism provided in the housing and compressing the working fluid; a partition disposed in the housing and dividing the interior space into a low pressure region in fluid communication with the intake port of the compression mechanism and a high pressure region in fluid communication with the exhaust port of the compression mechanism; and a heat shield disposed in the low pressure region and between the diaphragm and the compression mechanism. By adopting the heat shield, the high-pressure area and the low-pressure area in the shell can be effectively thermally isolated, the heat shield is favorable for guiding the low-pressure fluid into the air inlet of the compression mechanism so as to prevent the low-pressure fluid from approaching the partition plate to absorb heat, so that the heat transfer from the high-pressure area is further isolated, the efficiency of the scroll compressor is improved, and the heat shield and the scroll compressor have simple structures, are easy to manufacture and install, and have high cost benefit and practical value.

Description

Scroll compressor having a plurality of scroll members

Technical Field

The present invention relates to the field of compressors, and in particular, to scroll compressors.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

Compressors (e.g., scroll compressors, etc.) may be used in applications such as refrigeration systems, air conditioning systems, and heat pump systems. In the casing of the scroll compressor, a partition (a sound-deadening cover) is generally employed to separate a low-pressure region from a high-pressure region, but heat of a high-temperature and high-pressure fluid in the high-pressure region can be transferred to a low-temperature and low-pressure fluid in the low-pressure region via the partition, resulting in a reduction in compressor efficiency. In response to this problem, various insulating material components have been used in the prior art to prevent such heat transfer, however, the prior art solutions are generally complicated and difficult to implement or do not facilitate subsequent welding operations of the partition, and it is difficult to achieve a satisfactory insulating effect.

Accordingly, there is a need for an improved scroll compressor that can achieve better thermal insulation and reduce costs while facilitating installation operations.

Disclosure of Invention

This summary is provided to introduce a general summary of the invention, not a full disclosure of the full scope of the invention or all of the features of the invention.

It is an object of the present invention to provide an improved scroll compressor which provides effective thermal isolation of high and low pressure regions within the scroll compressor housing.

It is a further object of the present invention to provide an improved scroll compressor which facilitates the channeling of low pressure fluid (i.e., working fluid) into the intake of the compression mechanism to prevent the low pressure fluid from absorbing heat proximate the partition, thereby further isolating heat transfer from the high pressure region, resulting in further improved efficiency of the scroll compressor.

It is a further object of the present invention to provide an improved scroll compressor which is simple in construction, easy to manufacture and install, and of high cost effectiveness and utility value.

According to one aspect of the present invention, there is provided a scroll compressor comprising:

a housing enclosing an interior space;

a compression mechanism disposed in the housing and configured to compress a working fluid;

a baffle disposed in the housing and dividing the interior space into a low pressure region in fluid communication with an intake port of the compression mechanism and a high pressure region in fluid communication with an exhaust port of the compression mechanism; and

a heat shield disposed in the low pressure region and between the diaphragm and the compression mechanism.

According to a preferred embodiment of the invention, the heat shield is generally annular and comprises a radially outer peripheral portion spaced from the casing and/or the partition. By spacing the outer peripheral portion of the heat shield (the weld point where the outer peripheral portion is closer to the outer peripheral portion of the baffle) from the baffle, the heat shield can be better protected from damage and also facilitates baffle welding. Thereby greatly reducing the production and installation cost and effectively saving the assembling time of the compressor.

According to a preferred embodiment of the present invention, the outer peripheral portion includes a flow guide portion configured to guide the working fluid toward an air inlet of the compression mechanism.

According to a preferred embodiment of the present invention, the heat shield is a separate member formed separately from the partition plate, and a gap exists between the heat shield and the partition plate in the axial direction. The structure of the heat shield is simpler, the heat shield is easier to manufacture and install, and a better heat insulation effect can be realized. In particular, since there is a gap between the heat shield and the partition plate in the axial direction, the cryogenic fluid can enter the gap, forming a good coolant medium, thereby further blocking heat transfer from the partition plate.

According to a preferred embodiment of the present invention, the heat shield is attached to the non-orbiting scroll of the compression mechanism or the partition plate.

According to a preferred embodiment of the present invention, the heat shield further includes a radially inner peripheral portion through which the heat shield is mounted to the non-orbiting scroll or the partition plate.

According to a preferred embodiment of the present invention, the inner peripheral portion includes a flange extending in the axial direction, the flange being mounted to the non-orbiting scroll or the partition plate.

According to a preferred embodiment of the present invention, the heat shield is a single-layered plate member or a double-layered member having a hollow cavity.

According to a preferred embodiment of the present invention, the heat shield having the hollow cavity is provided with an air vent fluidly connecting the hollow cavity with the low pressure region. The heat shield is hollow, so that a heat insulating chamber can be formed, and the heat insulating chamber is filled with the low-temperature fluid from the low-pressure region, thereby effectively blocking the heat transfer from the high-pressure region to the low-pressure region through the partition plate.

According to a preferred embodiment of the present invention, the heat shield includes a stepped portion that matches a stepped profile of an outer sidewall of a non-orbiting scroll of the compression mechanism, and the heat shield is supported on the non-orbiting scroll by the stepped portion. The heat shield with the structure does not need to be fixedly installed, can be simply installed between the fixed scroll and the partition plate, greatly saves labor cost and is very convenient to replace.

According to a preferred embodiment of the present invention, the heat shield includes a metal joint portion made of a metal material constituting the inner peripheral edge portion and a remaining non-metal material portion, the metal joint portion and the non-metal material portion being formed as a single piece by injection molding.

According to a preferred embodiment of the invention, the heat shield is made of a non-metallic material having a thermal conductivity of 1.3W/mK or less, or of a metallic material having a thermal conductivity of between 30W/mK and 50W/mK.

In summary, the scroll compressor according to the present invention can achieve the following advantageous effects: by adopting the heat shield, the high-pressure area and the low-pressure area in the scroll compressor shell can be effectively thermally isolated, the heat shield is favorable for guiding the low-pressure fluid into the air inlet of the compression mechanism so as to prevent the low-pressure fluid from approaching the partition plate to absorb heat, thereby further isolating the heat transfer from the high-pressure area and further improving the efficiency of the scroll compressor.

Drawings

The foregoing and additional features and characteristics of the present invention will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings, which are given by way of example only and which are not necessarily drawn to scale. Like reference numerals are used to indicate like parts in the accompanying drawings, in which:

FIG. 1 shows a longitudinal cross-sectional view of a scroll compressor according to a first embodiment of the present invention;

FIG. 2 shows a partial longitudinal cross-sectional view of the scroll compressor of FIG. 1;

FIG. 3 shows a partial longitudinal cross-sectional view of a scroll compressor according to a second embodiment of the present invention;

FIGS. 4 a-4 c show a scroll compressor and a heat shield therein according to a third embodiment of the present invention, in particular, FIG. 4a shows a partial longitudinal cross-sectional view of a scroll compressor according to a third embodiment of the present invention, FIG. 4b shows a perspective view of the heat shield in FIG. 4a, and FIG. 4c shows a longitudinal cross-sectional view of the heat shield in FIG. 4 b;

FIGS. 5a to 5c show a scroll compressor and a heat shield therein according to a fourth embodiment of the present invention, in particular FIG. 5a shows a partial longitudinal cross-sectional view of a scroll compressor according to a fourth embodiment of the present invention, FIG. 5b shows a perspective view of the heat shield in FIG. 5a, and FIG. 5c shows a longitudinal cross-sectional view of the heat shield in FIG. 5 b;

FIGS. 6a to 6c show a scroll compressor and a heat shield therein according to a fifth embodiment of the present invention, in particular FIG. 6a shows a partial longitudinal cross-sectional view of a scroll compressor according to a fifth embodiment of the present invention, FIG. 6b shows a perspective view of the heat shield in FIG. 6a, and FIG. 6c shows a longitudinal cross-sectional view of the heat shield in FIG. 6 b;

FIGS. 7 a-7 b illustrate a heat shield in a scroll compressor according to a sixth embodiment of the present invention, specifically FIG. 7a illustrates a perspective view of the heat shield and FIG. 7b illustrates a longitudinal cross-sectional view of the heat shield in FIG. 7 a; and

FIG. 8 is a graph showing the results of comparative testing of a scroll compressor according to the present invention and a prior art scroll compressor.

Detailed Description

The invention will now be described in detail with reference to the specific embodiments shown in figures 1 to 8. The following detailed description is for the purpose of illustration only and is not intended to limit the invention or its application or uses.

In each of the embodiments described below, a vertical scroll compressor is exemplified for convenience of description. It will be appreciated that the scroll compressor according to the present invention may be any suitable type of scroll compressor, such as a horizontal scroll compressor.

First, the overall configuration of a scroll compressor 100 according to a first embodiment of the present invention is described with reference to fig. 1.

As shown in fig. 1, a scroll compressor 100 may include a housing 10, an electric motor (including a stator 14 and a rotor 15), a drive shaft 16, a main bearing housing 18, an orbiting scroll 24, and a non-orbiting scroll 22. The orbiting scroll 24 and the non-orbiting scroll 22 constitute a compression mechanism CM adapted to compress a working fluid (e.g., a refrigerant), wherein the non-orbiting scroll 22 includes a non-orbiting scroll end plate, a non-orbiting scroll wrap, and a discharge port V at the center of the non-orbiting scroll; the orbiting scroll 24 includes an orbiting scroll end plate, an orbiting scroll wrap and a hub 240 defining an open suction chamber within the compression mechanism CM in fluid communication with the inlet S of the compression mechanism CM, and a series of closed compression chambers formed by the engagement of the orbiting and orbiting scroll wraps for compressing a working fluid. The rotor 15 is used to drive the drive shaft 16 to rotate the drive shaft 16 about its axis of rotation relative to the housing 10, the orbiting scroll 24 being coupled to the drive shaft 16 via the hub 240 and driven by the drive shaft 16 and being capable of translational rotation, i.e. orbiting, relative to the non-orbiting scroll 22 by means of the oldham ring (i.e. the axis of the orbiting scroll 24 orbits relative to the axis of the non-orbiting scroll 22, but both the orbiting and non-orbiting scrolls 24, 22 themselves do not rotate about their respective axes).

A partition plate 30 is provided in the casing 10, the partition plate 30 having a tapered annular shape and including an inner peripheral portion 301 on the radially inner side close to the discharge port V of the compression mechanism CM and an outer peripheral portion 303 on the radially outer side close to the casing 10. The partition 30 separates a high-pressure region A1 and a low-pressure region A2 inside the casing 10, wherein low-temperature and low-pressure fluid to be compressed (i.e., working fluid) is delivered into the low-pressure region A2 via an intake pipe 102 on the casing 10, and enters the compression mechanism CM via an intake port S (only the approximate position of the intake port S is schematically shown in fig. 1) to be compressed into high-temperature and high-pressure fluid, and is then discharged into the high-pressure region A1 via an exhaust port V, and is delivered to downstream equipment via an exhaust pipe 104 for subsequent use.

To solve the problem that the efficiency of the scroll compressor 100 is reduced due to the heat conduction between the high pressure region A1 having a relatively high temperature and the low pressure region A2 having a relatively low temperature through the partition plate 30, the present invention provides a heat shield 40 between the partition plate 30 and the compression mechanism CM, preferably, the fixed scroll 22, to block the heat transfer from the high pressure region A1 to the low pressure region A2.

In general, in preferred embodiments of the present invention, the heat shield 40 comprises a thermally insulating material, and is preferably made of a non-metallic material of low thermal conductivity, and is preferably constructed as a separate component having the shape of a solid of revolution. Compared with the heat-insulating coating, interlayer or film structure combined with the partition plate (noise reduction cover) in the prior art, the heat-insulating cover 40 has the advantages of wider material selection, low material cost, no need of sealing connection with other parts such as the shell 10, the compression mechanism CM and the like, simpler structure, easier manufacture and installation and better heat-insulating effect. The preferred embodiments will be described in detail below with reference to fig. 2-7 b.

FIG. 2 illustrates a partial longitudinal cross-sectional view of the scroll compressor 100 of FIG. 1, with the heat shield 40 more clearly shown. In the present first embodiment, the heat shield 40 is made of a non-metallic material having low thermal conductivity, and is generally configured as a separate member having a shape of a solid of revolution. Specifically, the heat shield 40 is configured in an annular shape including a radially inner peripheral portion 401 and a radially outer peripheral portion 403, wherein the inner peripheral portion 401 is dimensioned for interference fit mounting with the outer side wall of the non-orbiting scroll 22, thereby securing the heat shield 40 to the non-orbiting scroll 22 as shown and spacing the heat shield 40 from the partition 30 as a whole, that is, the heat shield 40 is spaced from the partition 30 in the vertical axial direction of the scroll compressor 100 as in fig. 1 and 2 and is spaced from the partition 30 in the lateral radial direction of the scroll compressor 100 — that is, the outer peripheral portion 403 of the heat shield 40 is spaced from the partition 30. This can prevent heat in the high-pressure region A1 from being transferred to the heat shield 40 and further to the low-pressure region A2 via the partition plate 30. Also, typically, the baffle plate 30 (outer peripheral portion 303) needs to be welded to the shell 10 after the heat shield 40 is installed in place, and since the high welding temperatures may cause damage to the heat shield 40, by spacing the heat shield 40 from the baffle plate 30, and in particular, spacing the outer peripheral portion 403 of the heat shield 40 (the weld point where the outer peripheral portion 403 is closer to the outer peripheral portion 303 of the baffle plate 30) from the baffle plate 30, the heat shield 40 can be better protected from damage and also welding of the baffle plate 30 is facilitated. Thereby greatly reducing the production and installation cost and effectively saving the assembly time of the compressor.

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 bent toward the compression mechanism CM, and a portion of the flow guide portion 404 is located axially above the air inlet S of the compression mechanism CM, so as to better guide the low-temperature and low-pressure fluid from the low-pressure area A2 toward the air inlet S, enabling a majority of the low-pressure fluid to directly enter the compression mechanism CM without contacting the partition plate 30, so as to better block heat transfer from the high-pressure area A1 to the low-pressure fluid, further improving compressor efficiency.

It is noted here that in this embodiment, the outer peripheral portion 403 of the heat shield 40 (the outer peripheral portion 403 being closer to the weld of the outer peripheral portion 303 of the partition plate 30) is spaced from the partition plate 30, it being understood that this is intended to avoid excessive heat near the weld of the partition plate 30 damaging the heat shield 40, and for the same purpose, it may be preferable to space the outer peripheral portion 403 of the heat shield 40 from the casing 10 as well, particularly when the outer peripheral portion 403 of the heat shield 40 is located near the weld of the casing 10 to the partition plate 30.

FIG. 3 shows a partial longitudinal cross-sectional view of a scroll compressor 100 according to a second embodiment of the present invention. 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 of the second embodiment has substantially the same configuration as the heat shield 40 of the first embodiment, that is, as shown in fig. 3, the heat shield 40 of the second embodiment is also configured in an annular shape including a radially inner peripheral portion 401 and a radially outer peripheral portion 403. The differences are that: in the scroll compressor 100 of the second embodiment, the heat shield 40 includes 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 being formed in an annular shape and being bent toward the compression mechanism CM. Among them, in particular, the inner peripheral portion 401 of the heat shield 40 is sized so as to be able to be fitted with interference fit with the inner peripheral portion 301 of the partition plate 30 near the exhaust port V of the compression mechanism CM, thereby fixing the heat shield 40 to the partition plate 30 as shown in fig. 3 and spacing the other portions of the heat shield 40 from the partition plate 30.

In this embodiment, only the inner peripheral portion 401 of the heat shield 40 is in contact with the inner peripheral portion 301 of the partition plate 30, and the remaining portion is spaced apart from the partition plate 30. This configuration also well blocks the conduction of heat from the high-pressure region A1 to the low-pressure fluid because the inner peripheral edge portion 301 of the partition plate 30 is close to the exhaust port V of the compression mechanism CM and away from the intake port S of the compression mechanism CM, and also enables a large portion of the low-pressure fluid to directly enter the compression mechanism CM without contacting the partition plate 30, to better block the transfer of heat from the high-pressure region A1 to the low-pressure fluid, further improving the compressor efficiency.

Fig. 4a to 4c show a scroll compressor 100 and a heat shield 40 therein according to a third embodiment of the present invention, and in particular, fig. 4a shows a partial longitudinal cross-sectional view of the scroll compressor 100 according to the third embodiment of the present invention, fig. 4b shows a perspective view of the heat shield 40 in fig. 4a, and fig. 4c shows a longitudinal cross-sectional view of the heat shield 40 in fig. 4 b. The scroll compressor 100 of the third embodiment has substantially the same configuration as the scroll compressor 100 of the first embodiment, and the heat shield 40 of the third embodiment has substantially the same configuration as the heat shield 40 of the first embodiment, that is, as shown in fig. 4a to 4c, the heat shield 40 of the third embodiment is also configured in an annular shape including a radially inner peripheral portion 401 and a radially outer peripheral portion 403. The difference lies in that: in the scroll compressor 100 of the third embodiment, the heat shield 40 includes 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 being formed in an annular shape and being bent toward the compression mechanism CM. Wherein, as shown in fig. 4b in particular, 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 catches 4012, the plurality of catches 4012 are preferably evenly distributed along the entire flange 4011, correspondingly, the outer side wall of the non-orbiting scroll 22 comprises an annular groove 222, the plurality of catches 4012 can be snapped into the annular groove 222 so as to fix the heat shield 40 to the non-orbiting scroll 22 and to space the heat shield 40 from the partition plate 30 as a whole.

Fig. 5a to 5c show a scroll compressor 100 and a heat shield 40 therein according to a fourth embodiment of the present invention, and in particular, fig. 5a shows a partial longitudinal cross-sectional view of the scroll compressor 100 according to the fourth embodiment of the present invention, fig. 5b shows a perspective view of the heat shield 40 in fig. 5a, and fig. 5c shows a longitudinal cross-sectional view of the heat shield 40 in fig. 5 b. The scroll compressor 100 of the fourth embodiment has substantially the same configuration as the scroll compressor 100 of the third embodiment, and the heat shield 40 of the fourth embodiment has substantially the same configuration as the heat shield 40 of the fourth embodiment, that is, as shown in fig. 5a to 5c, the heat shield 40 of the fourth embodiment is also configured in an annular shape including a radially inner peripheral portion 401 and a radially outer peripheral portion 403, and the heat shield 40 includes a tapered main 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 being formed in an annular shape and being bent toward the compression mechanism CM. The difference lies in that: as shown in fig. 5b, the inner peripheral portion 401 of the heat shield 40 in the fourth embodiment includes a flange 4011 extending in the axial direction, the inner peripheral surface of the flange 4011 includes a plurality of protrusions 4014 protruding toward the radially inner side, the plurality of protrusions 4014 are preferably uniformly distributed along the entire flange 4011, the protrusions 4014 preferably have a rib shape as shown in fig. 5b and 5c, and as shown, the rib has an inclined transition side at the interface with the inner surface of the flange 4011 to facilitate mounting, and the heat shield 40 is fixed to the fixed scroll 22 by forming an interference fit between the plurality of protrusions 4014 and the outer side wall of the fixed scroll 22, and the heat shield 40 is spaced from the partition plate 30 as a whole. By providing an interference fit between the plurality of bosses 4014 and the outer sidewall of the non-orbiting scroll 22, the magnitude and distribution of the interference force can be controlled better, damage to the heat shield 40 due to excessive interference force can be avoided, and sufficient retention force can be provided.

Although the heat shield 40 in each of the above embodiments is made of only a non-metallic material, the present invention is not limited thereto. FIGS. 6a to 6c show a scroll compressor 100 and a heat shield 40 therein according to a fifth embodiment of the present invention, in particular FIG. 6a shows a partial longitudinal cross-sectional view of the scroll compressor 100 according to the fifth embodiment of the present invention, FIG. 6b shows a perspective view of the heat shield 40 in FIG. 6a, and FIG. 6c shows a longitudinal cross-sectional view of the heat shield 40 in FIG. 6 b. 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 fig. 6a to 6c, the heat shield 40 in the fifth embodiment is also configured in an annular shape including a radially inner peripheral portion 401 and a radially outer peripheral portion 403. The difference lies in that: in the fifth embodiment, the heat shield 40 is composed of a metallic material portion and a nonmetallic material portion, and specifically, the heat shield 40 includes an inner peripheral portion 401, a tabular main body 402, and a flow guide portion 404 constituting an outer peripheral portion 403, wherein the main body 402 and the flow guide portion 404 are made of a nonmetallic material, the inner peripheral portion 401 includes a metallic joint portion 405 made of a metallic material, and the metallic joint portion 405 is formed in one piece with the nonmetallic main body 402 by injection molding. The metal joint 405 is configured to form an interference fit with the outer peripheral wall of the non-orbiting scroll 22, thereby securing the heat shield 40 to the non-orbiting scroll 22 and causing the heat shield 40 to be spaced apart from the partition plate 30 as a whole. By adopting the metal joint 405 having the above-described structure, the heat shield 40 can be more firmly attached, and an excellent heat insulating effect can be achieved.

In the foregoing embodiments, the heat shields 40 are each in the form of a single-layered plate-shaped member, but the present invention is not limited thereto, and the heat shields of the present invention may also be configured in the form of a double-layered or multi-layered member having a hollow cavity. Fig. 7a to 7b show a heat shield 40 in a scroll compressor 100 according to a sixth embodiment of the present invention, in particular, fig. 7a shows a perspective view of the heat shield 40 and fig. 7b shows a longitudinal sectional view of the heat shield 40 in fig. 7 a. As shown in fig. 7a to 7b, in the present embodiment, the heat shield 40 is made of a non-metallic material having low thermal conductivity and is generally configured as a separate member having a shape of a solid of revolution. Unlike the single-layer heat shield 40 of the previous embodiments, the heat shield 40 of the present embodiment is constructed to resemble a hollow bladder-like structure, that is, as shown in fig. 7b, the longitudinal section of the heat shield 40 has a double-layer structure including a hollow cavity. The heat shield 40 includes a radially inner peripheral portion 401 and a radially outer peripheral portion 403, and the heat shield 40 is tapered from the outer peripheral portion 403 to the inner peripheral portion 401 as a whole, and includes a first side wall 407 facing the partition plate 30 and a second side wall 408 facing the compression mechanism CM, in particular, the non-orbiting 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 that matches the stepped profile of the outer side wall of the non-orbiting scroll 22 of the compression mechanism CM, thereby enabling the heat shield 40 to be supported on the non-orbiting scroll 22 and substantially fill the space between the partition plate 30 and the non-orbiting scroll 22. The heat shield 40 is hollow inside and can form a heat insulation cavity, so that the high-pressure area A1 can be effectively prevented from transferring heat to the low-pressure area A2 through the partition plate 30, the heat shield 40 with the structure does not need to be fixedly installed, installation can be completed by simply sitting between the fixed scroll 22 and the partition plate 30, labor cost is greatly saved, and replacement is very convenient. Further, it should be appreciated that this configuration of a stepped portion matching the stepped profile of the outer sidewall of the non-orbiting scroll 22 of the compression mechanism CM may also be combined with other embodiments of the present invention to facilitate installation of the heat shield.

In addition, preferably, in the present embodiment, the heat shield 40 further includes a plurality of air holes 409, and the plurality of air holes 409 are respectively disposed 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 region A2, thereby preventing the heat shield 40 from being crushed by a pressure difference between the inside and the outside of the heat shield 40. It should be understood that the air holes 409 may be disposed at any location of the heat shield 40, such as in the bottom wall 410 and/or the first sidewall 407 of the heat shield 40, so long as communication between the interior and the exterior of the heat shield 40 is enabled. Preferably, the air hole 409 is disposed away from the air inlet S of the compression mechanism CM to avoid affecting the entry of low-pressure fluid into the air inlet S, and more preferably, the air hole 409 is disposed in the second side wall 408 so as to be able to be away from the partition 30 to avoid heat radiation from the partition 30 from entering into the heat shield 40 while being able to avoid the air inlet S.

The above embodiments specifically describe the fitting relationship between the heat shield 40 and the non-orbiting scroll 22 and the partition plate 30 of the compression mechanism CM, however, it should be understood that the present invention is not limited thereto, and the heat shield according to the present invention can be fixed to the casing 10, the non-orbiting scroll of the compression mechanism CM, the partition plate 30, and the like by any suitable means such as screwing, riveting, interference fit, snap fit, welding, bonding, and the like. When the heat shield is fixed to the partition plate 30, as described above, it is preferable that its fixing point avoids the welding point of the partition plate 30 to protect the heat shield from damage; when the heat shield is fixed to the casing 10, likewise, its fixing point avoids the weld between the partition plate 30 and the casing 10 to protect the heat shield from damage.

Further, although the heat shield 40 in each of the above embodiments has a shape of a rotator, the present invention is not limited thereto. Although perhaps not preferred, it is to be understood that the heat shield of the present invention may also be embodied in the shape of a non-solid of revolution, i.e., a circumferentially non-closed annular structure, such as a circumferentially formed sector or the like, and may have a variety of different shapes depending on the application. In particular, with regard to the flow guide portion 402, similarly, although the flow guide portion 402 in the above-described respective embodiments is formed in an annular shape along the entire outer peripheral portion 403 of the annular heat shield 40 — that is, the flow guide portion 402 is configured as the entire outer peripheral portion 403, it should be understood that the flow guide portion 402 may be formed only as a part of the outer peripheral portion 403 of the heat shield 40, for example, the flow guide portion 402 may be formed only at a position of the heat shield 40 corresponding to the air inlet S of the compression mechanism CM to guide flow only with respect to the air inlet S. Similar variations can be implemented based on the foregoing disclosure as well as the design concept of the present invention.

FIG. 8 shows a chart of comparative test results of a scroll compressor 100 according to the present invention and a prior art scroll compressor. Specifically, the scroll compressor 100 in the foregoing first embodiment of the present invention was operated under the same operating conditions as the scroll compressor of the related art to perform comparative experiments.

In fig. 8, the two columns on the horizontal axis represent the scroll compressor 100 of the present invention and the scroll compressor of the related art, respectively, and "DLT" on the vertical axis represents the value of the Discharge Line Temperature (Discharge Line Temperature). Experimental results show that the scroll compressor 100 employing the heat shield 40 of the present invention results in a reduction in discharge tube temperature of 8 ° F compared to prior art scroll compressors. This means that the heat shield 40 of the present invention can significantly insulate the heat conduction from the high pressure area A2 to the low pressure area A1, thereby lowering the discharge pipe temperature and improving the compressor efficiency.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the specific embodiments described and illustrated in detail herein, and that various modifications and combinations of the exemplary embodiments and individual features thereof may be made by those skilled in the art without departing from the scope of the appended claims.

Claims (12)

1. A scroll compressor (100), comprising:

a housing (10) enclosing an interior space;

a Compression Mechanism (CM) disposed in the housing for compressing a working fluid;

a partition (30) disposed in the housing and dividing the interior space into a low pressure region (A2) in fluid communication with an intake (S) of the compression mechanism and a high pressure region (A1) in fluid communication with an exhaust (V) of the compression mechanism; and

a heat shield (40) disposed in the low pressure region and between the diaphragm and the compression mechanism.

2. The scroll compressor of claim 1, wherein the heat shield is generally annular and includes a radially outer peripheral edge portion (403) spaced from the housing and/or the baffle.

3. The scroll compressor of claim 2, wherein the outer peripheral portion includes a flow guide (404) configured to guide the working fluid toward an air inlet (S) of the compression mechanism.

4. The scroll compressor of claim 1, wherein the heat shield is a separate component formed separately from the partition, there being a gap between the heat shield and the partition in the axial direction.

5. The scroll compressor of claim 2, wherein the heat shield is mounted to a non-orbiting scroll of the compression mechanism or the partition plate.

6. The scroll compressor of claim 5, wherein the heat shield further includes a radially inner peripheral portion (401) through which the heat shield is mounted to the non-orbiting scroll or the partition plate.

7. The scroll compressor of claim 6, wherein the inner peripheral portion includes a flange (4011) extending in an axial direction, the flange being mounted to the non-orbiting scroll or the partition plate.

8. The scroll compressor of claim 2, wherein the heat shield is a single layer plate member or a double layer member having a hollow cavity.

9. The scroll compressor of claim 8, wherein the heat shield with the hollow cavity is provided with an air vent (409) fluidly connecting the hollow cavity with the low pressure region.

10. The scroll compressor of any one of claims 1-4 and 8-9, wherein the heat shield includes a step that matches a stepped profile of an outer sidewall of a non-orbiting scroll of the compression mechanism, the heat shield being supported on the non-orbiting scroll by the step.

11. The scroll compressor of claim 6, wherein the heat shield includes a metallic engagement portion (405) of a metallic material and a remaining non-metallic material portion constituting the inner peripheral portion, the metallic engagement portion and the non-metallic material portion being formed as a unitary piece by injection molding.

12. The scroll compressor of any one of claims 1-9, wherein the heat shield is made of a non-metallic material having a thermal conductivity of 1.3W/mK or less, or is made of a metallic material having a thermal conductivity between 30W/mK and 50W/mK.

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