CN112081747A

CN112081747A - Air inlet structure of high-pressure side scroll compressor and high-pressure side scroll compressor

Info

Publication number: CN112081747A
Application number: CN201910510639.7A
Authority: CN
Inventors: 胡小伟; 倪凌枫; 李丽丽
Original assignee: Emerson Climate Technologies Suzhou Co Ltd
Current assignee: Copeland Suzhou Co Ltd
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-12-15

Abstract

The present invention relates to an air intake structure for a high-pressure side scroll compressor. The air intake structure includes an intake pipe. The air intake structure further includes a connector, a first portion of the connector being sealingly connected to the air intake pipe, a second portion of the connector being sealingly connected to an interface on the non-orbiting scroll such that working fluid from outside the high pressure side scroll compressor can flow to a suction cavity of the high pressure side scroll compressor via the air intake pipe and the connector, and the connector being configured to be at least partially movable relative to the air intake pipe and at least partially movable relative to the interface. The invention also relates to a high-pressure side scroll compressor. According to the air inlet structure for the high-pressure side scroll compressor and the high-pressure side scroll compressor, the vibration and noise can be effectively reduced from being transmitted to the air inlet pipe and the top cover from the compression mechanism, the requirements on the manufacturing precision and the assembling precision of each part can be reduced, the cost is reduced, and the assembly is easy.

Description

Air inlet structure of high-pressure side scroll compressor and high-pressure side scroll compressor

Technical Field

The invention relates to an air inlet structure for a high-pressure side scroll compressor and the high-pressure side scroll compressor with the air inlet structure.

Background

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

In the operation process of the scroll compressor, refrigerant gas enters the scroll compressor through the gas inlet pipe of the scroll compressor, enters the compression cavity of the compression mechanism along with the movement of the compression mechanism, and is discharged out of the scroll compressor after being compressed by the compression mechanism. For high side scroll compressors, the inlet tube is typically fixedly mounted (e.g., welded) to the top head of the scroll compressor and connected to the fixed scroll of the compression mechanism for fluid communication with the suction chamber formed in the fixed scroll for drawing refrigerant gas into the compression chamber of the compression mechanism in response to movement of the compression mechanism. To ensure the air suction efficiency, the air inlet pipe is hermetically connected to the air suction chamber in the fixed scroll. And in order to retain the seal between the inlet duct and the suction chamber to maintain a sealed connection, the portion of the inlet duct located within the suction chamber is fully engaged with the inner wall of the suction chamber, thus forming an approximately rigid connection between the inlet duct and the inner wall of the suction chamber of the non-orbiting scroll. In the high-pressure side scroll compressor of this configuration, vibration and noise generated during compression of the compression mechanism are easily transmitted to the intake pipe through the non-orbiting scroll and further to the head cover, so that the vibration and noise level of the compressor is increased. In addition, in the above design in which an approximately rigid connection is formed between the intake pipe and the intake chamber of the fixed scroll, high requirements are often placed on the manufacturing accuracy and the assembling accuracy of each component in order to achieve fitting between the intake pipe and the intake chamber.

Disclosure of Invention

An object of the present invention is to solve at least one of the above problems.

An aspect of the present invention is to provide an air intake structure for a high pressure side scroll compressor. The high side scroll compressor includes a compression mechanism having a suction chamber defined therein. The compression mechanism includes a fixed scroll provided with a joint portion. The air intake structure includes an intake pipe, and further includes a connector. The first portion of the connector is sealingly connected to the intake pipe and the second portion of the connector is sealingly connected to the interface portion such that working fluid from outside the high-side scroll compressor can flow to the suction cavity via the intake pipe and the connector. The connector is configured to be at least partially movable relative to the air inlet conduit and at least partially movable relative to the interface portion.

In one embodiment, the first part is floatingly plugged with the inlet pipe via a first seal, and the second part is floatingly plugged with the connecting port via a second seal.

At the junction between the first portion and the intake pipe, a first projecting portion that projects radially outward from an outer peripheral surface of one of the first portion and the intake pipe on the inner side is formed on the outer peripheral surface, the first projecting portion is provided with a first mounting groove for mounting a first seal, and the first portion and the intake pipe are configured such that only the first projecting portion cooperates with an inner peripheral surface of the other of the first portion and the intake pipe on the outer side to hold the first seal.

At the junction between the second portion and the interface portion, a second projecting portion projecting radially outward from an outer peripheral surface of an inner one of the second portion and the interface portion is formed on the outer peripheral surface, the second projecting portion is provided with a second mounting groove for mounting a second seal, and the second portion and the interface portion are configured such that only the second projecting portion cooperates with an inner peripheral surface of an outer other one of the second portion and the interface portion to hold the second seal.

A first through hole is formed in the first portion, and a second through hole is formed in the second portion, the first and second through holes communicating with each other, and an inner step is formed between the first and second through holes.

In one embodiment, the first through opening and the second through opening are arranged eccentrically to each other and/or the inner diameter of the first through opening is larger than the inner diameter of the second through opening.

Preferably, the first through hole is configured such that a flow area of the intake pipe is larger than a flow area of the suction chamber.

In one embodiment, an end portion of the air inlet tube is inserted into the first through hole, and the inner step portion is adapted to abut against the end portion of the air inlet tube, thereby defining a range of upward movement of the connector in the axial direction relative to the air inlet tube.

In one embodiment, the first portion has an outer diameter greater than an outer diameter of the second portion, an outer step being formed between the first and second portions, the second portion being at least partially inserted into the interface portion, the outer step being adapted to abut the interface portion to thereby define a range of axially downward movement of the connector relative to the interface portion.

Preferably, the outer diameter of the first portion is greater than the outer diameter of the interface portion.

Preferably, the second portion and the interface portion are configured such that an end face of the second portion is suspended within the interface portion when the interface portion is in abutment with the outer step.

In one embodiment, the first portion is sealingly engaged with the inlet conduit and the second portion is sealingly engaged with the interface portion, the connector further comprising a bellows portion between the first portion and the second portion. At least the bellows is movable relative to the air inlet conduit and relative to the interface portion.

In one embodiment, the high side scroll compressor further includes a head cover through which the intake pipe extends and is fixedly mounted to the head cover.

Another aspect of the present invention is to provide a high pressure side scroll compressor including an air intake structure according to the present invention.

The invention provides an improved air inlet structure for a high-pressure side scroll compressor, which is characterized in that a connecting piece is arranged between an air inlet pipe of the high-pressure side scroll compressor and a connecting part formed on a fixed scroll plate, and flexible connection is formed between the air inlet pipe and the connecting part, so that vibration and noise can be effectively reduced and transmitted from a compression mechanism to the air inlet pipe and a top cover, and the vibration and noise level of the high-pressure side scroll compressor is reduced. In addition, the air inlet structure for the high-pressure side scroll compressor and the high-pressure side scroll compressor can reduce the requirements on the manufacturing precision and the assembling precision of each part, reduce the cost and facilitate the assembly.

Drawings

Embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings. In the drawings, like features or components are designated with like reference numerals, and the drawings are not necessarily drawn to scale, and wherein:

FIG. 1 illustrates a partial cross-sectional view of a prior art high side scroll compressor;

FIG. 2 is an enlarged fragmentary view of FIG. 1 showing the connection between the air intake structure of the high side scroll compressor and the interface on the non-orbiting scroll;

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

FIG. 4 is a partial view of FIG. 3 showing an air intake structure of the high side scroll compressor of FIG. 3;

FIG. 5 is an enlarged fragmentary view of FIG. 4 showing the connections between portions of the air intake structure of the high side scroll compressor;

FIG. 6 is an enlarged fragmentary view of FIG. 5, detailing the connection between the connection of the inlet structure of the high side scroll compressor and the interface on the non-orbiting scroll; and

FIG. 7 is a partial cross-sectional view of a high side scroll compressor according to a second embodiment of the present invention.

Detailed Description

The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, like reference numerals indicate like or similar parts and features. The drawings are only schematic representations of the concepts and principles of embodiments of the present invention, and do not necessarily show the specific dimensions and proportions of the various embodiments of the invention. Certain features that are part of a particular figure may be used in an exaggerated manner to illustrate relevant details or structures of embodiments of the present invention.

In describing embodiments of the present invention, directional terminology used in connection with "up" and "down" is used in the context of describing the up and down positions of the views illustrated in the drawings. In the practical application of the scroll compressor, the positional relationships of "up", "down", "left" and "right" used herein may be defined according to practical situations, and these relationships may be reversed to each other.

Fig. 1 shows a partial cross-sectional view of a conventional high-pressure side scroll compressor 1, showing an intake structure and a compression mechanism M of the high-pressure side scroll compressor 1. As shown in fig. 1, the top cover 4 is sealingly mounted to the upper end of the housing 3, thereby collectively defining a high-pressure space V within the high-pressure side scroll compressor 1. The compression mechanism M is provided in the casing 3, and includes a fixed scroll 5 and a movable scroll (not shown). The orbiting scroll is adapted to translate relative to the non-orbiting scroll 5 such that the vanes of the orbiting scroll engage the vanes 52 of the non-orbiting scroll 5 to define a series of compression chambers between the orbiting and non-orbiting scrolls 5. The compression mechanism M also has a suction chamber 53 defined therein. The suction chamber 53 is configured to periodically communicate with a compression chamber in the compression mechanism M. The fixed scroll 5 is provided with a connecting port portion 55, and the connecting port portion 55 opens to the upper surface of the end plate 51 and opens into the suction chamber 53. The intake structure of the high-pressure side scroll compressor 1 includes an intake pipe 2. The intake pipe 2 is fixedly attached to the top cover 4 by welding, penetrates the top cover 4, and is connected to a connecting portion 55 on the fixed scroll 5. During operation of the high-pressure side scroll compressor 1, as the compression mechanism M performs a compression motion, a working fluid (e.g., a refrigerant gas) flows from the high-pressure side scroll compressor 1 to the suction chamber 53 through the intake pipe 2, and enters the compression chamber within the compression mechanism M from the suction chamber 53, as shown by the arrowed curve in fig. 1. The compressed working fluid (e.g., high-pressure refrigerant gas) exits the compression mechanism M from the discharge port 54 of the non-orbiting scroll 5, enters the high-pressure space V in the housing of the high-pressure side scroll compressor 1, and exits the high-pressure side scroll compressor 1 through a discharge port (not shown).

Fig. 2 shows an enlarged view of circle a in fig. 1, showing the fit between the intake pipe 2 and the interface portion 55. To ensure the air intake efficiency, the lower end portion 21 of the intake pipe 2 is sealingly tightly fitted in the interface portion 55 via a seal S. As shown in fig. 2, in order to prevent the seal member S from being pushed out of the connection portion between the intake pipe 2 and the connecting port portion 55, the outer peripheral surface of the portion of the intake pipe 2 located inside the connecting port portion 55 is completely fitted to the inner peripheral surface of the connecting port portion 55 on the non-orbiting scroll 5, and a fitting surface with a small fitting gap is formed between the intake pipe 2 and the connecting port portion 55, thereby holding the seal member S in the mounting groove 22 on the intake pipe 2. This close fit between the intake pipe 2 and the interface portion 55 on the non-orbiting scroll 5 forms an approximately rigid connection between the intake pipe 2 and the non-orbiting scroll 5, so that vibrations and noise generated during compression by the compression mechanism M are easily transmitted from the non-orbiting scroll 5 to the intake pipe 2 and further to the head cover 4, which results in an increase in the vibration and noise level of the high pressure side scroll compressor 1.

In addition, in order to achieve a tight fit between the intake pipe 2 and the interface portion 55 on the non-orbiting scroll 5, it is necessary to mount the intake pipe 2 in alignment with the interface portion 55 during assembly. However, in the process of welding the intake pipe 2 to the top cover 4, the intake pipe 2 is easily deformed, resulting in positional deviation between the intake pipe 2 and the connecting port portion 55 on the non-orbiting scroll 5, making it difficult to achieve a close-fitting mounting therebetween. Therefore, the above configuration imposes high demands on both the manufacturing accuracy and the assembling accuracy of the respective members in order to achieve a close fit between the intake pipe 2 and the interface portion 55. In addition, since the air inlet pipe 2 must be aligned with the interface 55, the installation position and size (e.g., cross-sectional size) of the air inlet pipe 2 are often limited due to space limitations in the high-pressure scroll compressor 1, which causes a small flow area of the air inlet pipe 2, which makes the compressor less effective in volume and the like under high-speed conditions, and reduces the performance of the compressor. This problem is particularly pronounced in the case of inverter compressors.

In view of the above problems, the present inventors have proposed an improved design scheme for a high-pressure scroll compressor, in which an air intake structure of the high-pressure scroll compressor is improved, and a connection member is provided between an air intake pipe and an interface portion of a fixed scroll, so as to form an axially flexible connection between the air intake pipe and the interface portion of the fixed scroll, thereby effectively reducing vibration and noise transmitted from the fixed scroll to the air intake pipe and a top cover of a compression mechanism, and thus reducing vibration and noise levels of the high-pressure scroll compressor. The high pressure side scroll compressor according to the present invention will be explained with reference to the accompanying drawings.

Fig. 3 to 6 show a high pressure side scroll compressor 100 according to a first embodiment of the present invention. The high pressure side scroll compressor 100 according to the present inventive concept is different from the high pressure side scroll compressor 1 shown in fig. 1 to 2 in the design of an air intake structure, and is otherwise substantially the same. Therefore, differences are shown in the drawings, and the same features as those of the high pressure side scroll compressor 1 are denoted by the same reference numerals, and hereinafter, the differences will be mainly described, and the description will not be repeated for the same portions.

Fig. 3 shows a partial sectional view of the high pressure side scroll compressor 100, showing the compression mechanism M and the air intake structure of the high pressure side scroll compressor 100. The air intake structure of the high pressure side scroll compressor 100 includes an intake pipe 2 and a connection member 6. The intake pipe 2 is fixedly attached to the top cover 4 by welding, penetrates the top cover 4, and is connected to a connecting portion 55 on the fixed scroll 5 via a connecting member 6. The connecting member 6 comprises a first part 61 and a second part 62 which are integrally formed. The first portion 61 is connected to the intake pipe 2, and the second portion is connected to the joint portion 55.

Fig. 4 is a partial view of fig. 3, with the top cover 4 and the housing 3 removed from fig. 3, showing an air intake structure of the high pressure side scroll compressor 100. Fig. 5 is a partially enlarged view of fig. 4, showing a portion in a broken-line frame B in fig. 4, further showing an air intake structure of the high pressure side scroll compressor 100. As shown in fig. 4 and 5, a first through hole 64 and a second through hole 65 are formed in the first portion 61 and the second portion 62 of the connecting member 6, respectively. The first through hole 64 and the second through hole 65 communicate with each other, and an inner step portion (first stopper portion) 66 is formed at the junction therebetween. The connecting member 6 is a pipe member whose outer peripheral surface is stepped, the first portion 61 has a larger outer diameter, and the second portion 62 has a smaller outer diameter, so that an outer step portion (second stopper portion) 63 is formed between the first portion 61 and the second portion 62.

As shown by a circle C in fig. 5, the lower end portion 21 of the intake pipe 2 is mounted to the first portion 61 of the joint 6 via a first seal S1, and as shown by a circle D in fig. 5, the second portion 62 of the joint 6 is mounted to the connecting port portion 55 on the non-orbiting scroll 5 via a second seal S2. In comparison with the above-described design in which only the seal S is provided in the radial direction between the intake pipe 2 and the suction chamber 53 in the high-pressure side scroll compressor 1, by providing the first seal S1 and the second seal S2 at different positions in the radial direction (left-right direction in the drawing) between the intake pipe 2 and the connecting port portion 55, the high-pressure side scroll compressor 100 can allow a positional error within an error allowable range between the intake pipe 2 and the connecting port portion 55 by virtue of the elasticity of the first seal S1 and the second seal S2 themselves, and thus can reduce the requirements for the manufacturing accuracy and mounting accuracy of the components.

The lower end portion 21 of the intake pipe 2 is inserted into the first through hole 64 of the connector 6, and the connector 6 is not fixed to the intake pipe 2 but is movable in the axial direction (up-down direction in the drawing) relative to the intake pipe 2 and is rotatable relative to the intake pipe 2, thereby forming a floating connection between the intake pipe 2 and the connector 6. Similarly, the second portion 62 of the attachment member 6 is at least partially inserted into the interface portion 55 on the fixed scroll 5, and the attachment member 6 is not fixed to the interface portion 55 but is axially movable relative to the interface portion 55 and rotatable relative to the interface portion 55, thereby forming a floating connection between the attachment member 6 and the interface portion 55. Therefore, the connection member 6 can move relative to the intake pipe 2 and also relative to the connecting portion 55 of the fixed scroll 5, thereby forming a flexible connection between the intake pipe 2 and the fixed scroll 5. Further, advantageously, as shown in fig. 5, the outer diameter of the interface portion 55 is arranged to be smaller than the outer diameter of the first portion 61 of the connector 6, more specifically, the outer diameter of the interface portion 55 is arranged to be smaller than the outer diameter of the outer step 63 of the connector 6 that can abut against it, thereby further facilitating the movement of the connector 6 relative to the interface portion 5. With this arrangement, the transmission of vibration and noise to the intake pipe 2, which are generated during compression by the compression mechanism M, can be effectively reduced due to the movement of the connection 6 relative to the intake pipe 2 and the interface portion 55, so that the vibration and noise level of the high-pressure side scroll compressor 100 can be reduced.

When the connector 6 moves in the axial direction relative to the intake pipe 2 and the connecting port portion 55, the outer step portion 63 abuts against the connecting port portion 55 of the intake chamber 53, and the connector 6 is restricted from moving downward in the axial direction by an excessive distance, thereby preventing the first seal S1 provided between the connector 6 and the intake pipe 2 from coming off; by the abutment of the inner step portion 66 with the lower end portion 21 of the intake pipe 2, the connecting piece 6 is restricted from moving upward in the axial direction by an excessive distance, thereby preventing the second seal S2 provided between the second portion 62 of the connecting piece 6 and the suction chamber 53 from coming off. With this arrangement, while the above-described flexible connection between the intake pipe 2 and the fixed scroll 5 is achieved, the sealed connections between the intake pipe 2 and the coupling member 6 and between the coupling member 6 and the interface portion 55 are also ensured, thereby ensuring the air intake efficiency of the high-pressure side scroll compressor 100. Preferably, the second portion 62 and the connecting port portion 55 of the connecting member 6 are configured such that, even when the connecting port portion 55 of the suction chamber 53 abuts against the outer step portion 63, the lower end face of the second portion 62 of the connecting member 6 is suspended within the connecting port portion 55 without abutting against the step portion 56 within the connecting port portion 55, so that a gap is formed between the lower end face of the second portion 62 of the connecting member 6 and the step portion 56, and it is possible to further reduce the transmission of vibration and noise to the connecting member 6 via the fixed scroll 5.

In addition, as shown in fig. 4 to 6, the center axis O1 of the first through hole 64 and the center axis O2 of the second through hole 65 in the connector 6 are offset from each other, the first through hole 64 and the second through hole 65 are eccentrically disposed from each other, and the diameter of the first through hole 64 may be set larger than the diameter of the second through hole 65. With the above arrangement, on the one hand, the air inlet pipe 2 does not need to be concentrically aligned with the interface part 55 on the non-orbiting scroll 5, and in conjunction with the movement (axial movement and circumferential movement) of the connector 6 relative to the air inlet pipe 2 and the interface part 55, it is possible to further allow a greater degree of positional deviation between the air inlet pipe 2 and the interface part 55, which is advantageous for the installation of the air inlet pipe 2 to the interface part 55, and allows further reduction in the requirements for the manufacturing accuracy and the assembling accuracy of each component, so that the cost can be reduced; on the other hand, the size of the air inlet pipe 2 is not limited by the interface part 55, so that the size of the cross section of the air inlet pipe 2 can be properly increased, the flow area of the air inlet pipe 2 is increased, and the volumetric efficiency of the compressor under the high-rotation-speed working condition is favorably improved, and therefore the performance of the high-pressure side scroll compressor 100 is improved.

Fig. 6 is an enlarged view of a portion in circle D in fig. 5, showing the fitting between the connector 6 and the interface portion 55. As shown in fig. 6, the second portion 62 of the connecting member 6 is provided on the outer peripheral surface thereof with a mounting groove 67, and a second seal member S2 is mounted in the mounting groove 67 and fitted to the inner peripheral surface of the interface portion 55. In general, to further improve the flexible connection between the parts that are fitted to each other via the seal to allow relative movement between the parts, the gap between the parts that are fitted to each other may be increased, the greater the gap, the better the connection flexibility. However, the larger the gap, the greater the risk of seal extrusion, and the resulting risk of seal failure. For this reason, in the present invention, in order to improve the flexible and sealed connection between the connector 6 and the connecting port portion 55, a projection (second projection) 68 is formed on the outer peripheral surface of the second portion 62 of the connector 6 around the mounting groove 67. The projecting portion 68 projects radially outwardly from the outer peripheral surface of the second portion 62 of the connecting member 6 and engages with the inner peripheral surface of the connecting port portion 55 such that an engaging surface is formed between the projecting portion 68 and the connecting port portion 55, thereby retaining the second seal member S2 within the mounting groove 67 and forming a sealed connection between the connecting port portion 55 and the connecting member 6. During the movement of the connector 6 relative to the interface portion 55, the protrusion 68 is always located in the interface portion 55, and only the protrusion 68 engages with the inner peripheral surface of the interface portion 55, while the rest of the second portion 62 of the connector 6 located in the suction cavity 53 forms a larger gap with the inner peripheral surface of the interface portion 55, and does not contact or engage with the inner peripheral surface of the interface portion 55. Through the arrangement, the sealing connection between the connecting part 55 and the connecting part 6 can be ensured, meanwhile, the matching surface between the connecting part 6 and the connecting part 55 is obviously reduced, on one hand, the mounting flexibility between the mounting part 6 and the fixed scroll 5 can be further improved, the vibration and the noise can be effectively prevented from being transmitted to the connecting part 6 from the fixed scroll 5, on the other hand, the manufacturing error and the assembling error can be offset, and the requirements on the manufacturing accuracy and the assembling accuracy of each part are further reduced. Preferably, the height of the projection 68 in the axial direction (up and down in the drawing) is designed to be as small as possible to minimize the mating surface between the connection member 6 and the interfacing portion 55, so as to provide as much flexibility as possible to the connection between the connection member 6 and the non-orbiting scroll 5, provided that the second seal member S2 is not squeezed out, resulting in a failure of the sealed connection between the connection member 6 and the interfacing portion 55.

The fitting between the connector 6 and the interface portion 55 described above in connection with fig. 6 is also applicable to the fitting between the intake pipe 2 and the connector 6 shown in the circle C of fig. 5. That is, on the lower end portion 21 of the intake pipe 2, a projection (first projection) is formed around the mounting groove of the first seal member S1, which projects radially outward from the outer peripheral surface of the intake pipe 2 and engages with the inner peripheral surface of the first portion 61 of the connection member 6, so that a mating surface is formed between the projection and the inner peripheral surface of the first portion 61 of the connection member 6, thereby holding the first seal member S1 in the mounting groove formed on the lower end portion 21 of the connection member 6. During the movement of the connection member 6 relative to the intake pipe 2, the protrusion is always located in the first portion 61 of the connection member 6, and only the protrusion engages with the inner peripheral surface of the first portion 61 of the connection member 6, while the remaining portion of the intake pipe located in the first portion 61 of the connection member 6 and the inner peripheral surface of the first portion 61 form a large gap therebetween, without contacting or engaging with the inner peripheral surface of the first portion 61, thereby ensuring the sealing connection between the intake pipe 2 and the connection member 6, significantly reducing the engaging surface between the intake pipe 2 and the connection member 6, improving the mounting flexibility between the intake pipe 2 and the connection member 6, preventing vibration and noise from being transmitted to the intake pipe 2, and allowing the requirements for the manufacturing accuracy and the assembling accuracy of each component to be reduced.

The high pressure side scroll compressor 100 according to the first embodiment of the present invention is described above with reference to fig. 3 to 6. In the high-pressure side scroll compressor 100 of the first embodiment of the present invention, by providing the connection member 6 between the intake pipe 2 and the interface portion 55, a flexible connection between the intake pipe 2 and the interface portion 55 is provided, and transmission of vibration and noise from the compression mechanism M to the intake pipe 2 and the top cover 4 can be effectively reduced; the flexible connection between the intake pipe 2 and the interface portion 55 is further improved by advantageously reducing the mating surfaces between the connecting member 6 and the intake pipe 2 and the interface portion 55; and by adopting the mutually eccentric design for the connection between the air inlet pipe 2 and the connecting piece 6 and the connection between the connecting piece 6 and the interface part 55, the requirement on the assembly precision of each part can be further reduced, and the size of the air inlet pipe 2 is not limited by the interface part 55, so that the flow area of the air inlet pipe 2 can be increased, the volume efficiency under the high-rotation-speed working condition is improved, and the performance of the high-pressure side scroll compressor 100 is improved.

A high-pressure side scroll compressor 200 according to a second embodiment of the present invention will be described with reference to fig. 7. The high pressure side scroll compressor 200 according to the present inventive concept is different from the high pressure side scroll compressor 1 shown in fig. 1 to 2 and the high pressure side scroll compressor 100 shown in fig. 3 to 6 in the design of an air intake structure, and is otherwise substantially the same. Therefore, differences are shown in the drawings, and the same elements as those of the high pressure side scroll compressor 1, 100 are denoted by the same reference numerals, and hereinafter, the differences will be mainly described, and the description will not be repeated for the same portions.

Fig. 7 shows a partial cross-sectional view of the high-pressure side scroll compressor 200, illustrating the air intake structure of the high-pressure side scroll compressor 200. As shown in fig. 7, the air intake structure of the high-pressure side scroll compressor 200 includes an intake pipe 2 and a connector 7, and the intake pipe 2 is sealingly connected to a connecting port portion 55 on the fixed scroll 5 via the connector 7. The lower end portion 21 of the intake pipe 2 is sealingly connected to the first end portion 71 of the connector 7, and the second end portion 72 of the connector 7 is sealingly connected to the connecting port portion 55, so that working fluid (e.g., refrigerant gas) outside the high-pressure side scroll compressor 200 can flow to the suction chamber 53 via the intake pipe 2 and the connector 7, and enter the compression chamber within the compression mechanism M from the suction chamber 53. The connecting piece 7 is of bellows design, at least partly with corrugations 73. By this design, at least the bellows 73 is made movable relative to the inlet pipe 2 and also relative to the interface 55 on the fixed scroll 5. With the above arrangement, even if the first end portion 71 and the second end portion 72 of the joint 7 are fixedly mounted to the intake pipe 2 and the joint portion 55, respectively, flexible connection between the intake pipe 2 and the joint portion 55 can be achieved, so that transmission of vibration and noise from the non-orbiting scroll 5 to the intake pipe 2 and the head cover 4 can be effectively reduced, whereby vibration and noise levels of the high pressure side scroll compressor 200 can be reduced. In addition, by moving the bellows portion 73 of the connector 7 relative to the intake pipe 2 and relative to the interface portion 55, it is possible to allow the intake pipe 2 not to be aligned with the interface portion 55, and to allow a range of assembly errors therebetween, so that the requirements for the manufacturing accuracy and the assembly accuracy of the respective components can be reduced, and therefore the cost can be reduced. The high-pressure side scroll compressor 200 according to the second embodiment of the invention can achieve advantageous technical effects similar to those of the high-pressure side scroll compressor 100 according to the first embodiment of the invention described above.

The scroll compressor according to the preferred embodiment of the present invention is shown above. In the high-pressure side scroll compressor according to the preferred embodiment described above, the air intake structure of the high-pressure side scroll compressor is arranged such that the air intake pipe 2 is inserted into the first portion of the connection member and fitted with the inner peripheral surface of the connection member. However, the present invention is not limited thereto. In other embodiments according to the inventive concept, the first part of the connection piece may also be inserted into the air inlet tube 2. For example, in one modified example of the high-pressure side scroll compressor 100 of the first embodiment described above, the air intake structure may be arranged such that the first portion 61 of the connector 6 is inserted into the lower end portion 21 of the intake pipe 2, and the second portion of the connector is inserted into the interface portion 55, such that both the intake pipe 2 and the interface portion 55 are fitted with the outer peripheral surface of the connector. In this modified example, it is preferable to provide a mounting groove on the outer peripheral surface of the first portion 61 of the coupling 6 to mount the first seal S1, and to provide a stopper portion on the outer peripheral surface of the first portion 61 of the coupling 6 to limit the displacement of the coupling 6 in the axial direction with respect to the intake pipe 2 and the interfacing portion 55 on the non-orbiting scroll 5, respectively.

In the high-pressure side scroll compressor according to the preferred embodiment described above, the air intake structure of the high-pressure side scroll compressor is provided such that the second portion of the joint is inserted into the interface portion 55 and engaged with the inner peripheral surface of the interface portion 55. However, the present invention is not limited thereto. In other embodiments according to the inventive concept, in configurations in which the interface portion 55 projects from the surface of the end portion 51 of the fixed scroll 5, it is also possible to plug the interface portion 55 into the second part of the connection piece. For example, in one modified example of the high-pressure side scroll compressor 100 of the first embodiment described above, the air intake structure may be provided such that the interface portion 55 is plugged into the second portion 62 of the connection member 6. In this modified example, it is accordingly preferable to provide a mounting groove on the outer peripheral surface of the interface portion 55 to mount the second seal member S2.

In the high-pressure side scroll compressor according to the above preferred embodiment, the outer step portion 63 is formed between the first portion 61 and the second portion 62 of the joint 6, the inner step portion 66 is formed between the first through hole 64 and the second through hole 65 of the joint 6, and the range of movement of the joint 6 in the axial direction with respect to the joint portion 55 and the intake pipe 2 is restricted by the outer step portion 63 and the inner step portion 66. However, the present invention is not limited thereto. In other embodiments according to the inventive concept, no outer step or no inner step may be provided. For example, in one modified example, the connector 6 is provided to have a uniform outer diameter and a uniform inner diameter, and the range of movement of the connector 6 in the axial direction with respect to the joint portion 55 and the intake pipe 2 is limited by abutment of the connector 6 with a stopper (e.g., a step portion) formed in the joint portion 55 and abutment of the connector 6 with a stopper (e.g., a boss or the like) formed in the intake pipe 2.

In accordance with the preferred embodiment described above, the high side scroll compressors each include a top head and the inlet duct extends through the top head and is fixedly mounted thereto. However, the present invention is not limited thereto. The inventive concept can also be applied to a high-pressure side scroll compressor without a head cover, and also can achieve similar advantageous technical effects as described above.

Herein, exemplary embodiments of the present invention have been described in detail, but it should be understood that the present invention is not limited to the specific embodiments described and illustrated in detail above. Various modifications and alterations of this invention will become apparent to those skilled in the art without departing from the spirit and scope of this invention. All such variations and modifications are intended to be within the scope of the present invention. Moreover, all the components described herein may be replaced by other technically equivalent components.

Claims

1. An air intake structure for a high-pressure side scroll compressor (100, 200) including a compression mechanism (M) in which a suction chamber (53) is defined, the compression mechanism (M) including a fixed scroll (5) provided with an interface portion (55), the air intake structure including an air intake pipe (2),

characterized in that the air intake structure further comprises a connecting member (6, 7), a first portion (61, 71) of the connecting member (6, 7) is sealingly connected to the intake pipe (2), and a second portion (62, 72) of the connecting member (6, 7) is sealingly connected to the interface portion (55), so that working fluid from outside the high-pressure side scroll compressor (100, 200) can flow to the suction chamber (53) via the intake pipe (2) and the connecting member (6, 7), and the connecting member (6, 7) is configured to be at least partially movable relative to the intake pipe (2) and to be at least partially movable relative to the interface portion (55).

2. The air intake structure according to claim 1, wherein the first portion (61) is floatingly inserted with the intake pipe (2) via a first seal (S1), and the second portion (62) is floatingly inserted with the interface portion (55) via a second seal (S2).

3. The air intake structure according to claim 2, wherein, at a connection between the first portion (61) and the air intake pipe (2), a first projecting portion that projects radially outward from an outer peripheral surface of an inner one of the first portion (61) and the air intake pipe (2) is formed on the outer peripheral surface, the first projecting portion is provided with a first mounting groove for mounting the first seal (S1), and the first portion (61) and the air intake pipe (2) are configured such that only the first projecting portion cooperates with an inner peripheral surface of an outer other one of the first portion (61) and the air intake pipe (2) to hold the first seal (S1); and/or

At the connection between the second portion (62) and the interface portion (55), a second projecting portion (68) projecting radially outward from an outer peripheral surface of an inner one of the second portion (62) and the interface portion (55) is formed on the outer peripheral surface, the second projecting portion (68) is provided with a second mounting groove (67) for mounting the second seal (S2), and the second portion (62) and the interface portion (55) are configured such that only the second projecting portion (67) cooperates with an inner peripheral surface of an outer other one of the second portion (62) and the interface portion (55) to hold the second seal (S2).

4. The air intake structure according to claim 1, wherein a first through hole (64) is formed in the first portion (61), and a second through hole (65) is formed in the second portion (62), the first through hole (64) and the second through hole (65) communicating with each other, and an inner step portion (66) is formed between the first through hole (64) and the second through hole (65).

5. The air intake structure according to claim 4, wherein the first through hole (64) and the second through hole (65) are provided eccentrically to each other, and/or an inner diameter of the first through hole (64) is larger than an inner diameter of the second through hole (65).

6. The air intake structure according to claim 5, wherein the first through hole (64) is configured such that a flow area of the intake pipe (2) is larger than a flow area of the intake chamber (53).

7. The air intake structure according to claim 4, wherein the end portion (21) of the air intake pipe (2) is inserted into the first through hole (64), and the inner step portion (66) is adapted to abut against the end portion (21) of the air intake pipe (2), thereby defining a range of axially upward movement of the connecting member (6) relative to the air intake pipe (2).

8. An air inlet structure according to claim 4, wherein the first portion (61) has an outer diameter greater than an outer diameter of the second portion (62), an outer step (63) being formed between the first portion (61) and the second portion (62), the second portion (62) being at least partially inserted into the interface portion (55), the outer step (63) being adapted to abut the interface portion (55) so as to define a range of axial downward movement of the connector (6) relative to the interface portion (55).

9. The air intake structure according to claim 8, wherein an outer diameter of the first portion (61) is larger than an outer diameter of the interface portion (55).

10. The air intake structure according to claim 8, wherein the second portion (62) and the interface portion (55) are configured such that an end surface of the second portion (62) is suspended within the interface portion (55) when the interface portion (55) abuts the outer step portion (63).

11. An air inlet structure according to claim 1, wherein the first portion (71) is sealingly plugged with the air inlet pipe (2) and the second portion (72) is sealingly plugged with the interface portion (55), the connector (7) further comprising a bellows (73) between the first portion (71) and the second portion (72), at least the bellows (73) being movable with respect to the air inlet pipe (2) and with respect to the interface portion (55).

12. The intake structure according to any one of claims 1 to 11, wherein the high-pressure side scroll compressor (100, 200) further includes a head cover (4), and the intake pipe (2) penetrates the head cover (4) and is fixedly mounted to the head cover (4).

13. A high-pressure side scroll compressor (100, 200), characterized by comprising the air intake structure according to any one of claims 1 to 12.