JP5421725B2 - Scroll type fluid device - Google Patents

Description

  The present invention relates to a scroll type fluid device that can be used as a compressor or an expander, and more particularly to the structure of the device housing portion.

  A spiral wrap is integrally formed on the end plate of the fixed scroll member, and a spiral wrap is integrally formed on the end plate of the movable scroll member. A fluid pocket, which is a sealed space formed between the spiral wraps by revolving on the circular orbit while being arranged so that the side walls are in partial contact and preventing the rotation of the movable scroll member, In the case of a compressor, the volume of the fluid pocket is changed by moving from the outer end of the spiral wrap toward the center, and in the case of an expander, the volume of the fluid pocket is changed by moving from the center to the outer end. A scroll-type fluid device that compresses or expands the fluid taken in the fluid pocket is well known.

  In such a scroll-type fluid device, particularly a scroll-type compressor, reduction of suction pressure loss (for example, Patent Document 1), reduction of discharge pulsation and noise (for example, Patent Document 2), and vehicle air conditioning. It is strongly desired to achieve a reduction in size and weight (Patent Documents 1 and 2) when used in an apparatus or the like.

  In Patent Document 1, a fixed scroll member is formed integrally with the center housing in the center housing, and the outer end portion of the spiral wrap of the fixed scroll member is formed integrally with the inner peripheral surface of the housing to form a wide portion. A structure is disclosed in which a communication passage is formed in the wide portion to communicate the suction chamber and the fluid pocket. In this structure, the position of the outer shell shell end surface of the center housing joined to the front housing is axially higher than the height of the spiral wrap of the fixed scroll member, and the center shell outer shell is completely fixed. It is comprised in the form which wraps a scroll member.

  In Patent Document 2, a sub-housing is provided on the outer peripheral side of the center housing, a second discharge chamber that communicates with the first discharge chamber via a communication path is provided inside, and a discharge port is provided to the second discharge chamber. A structure that is provided to suppress discharge pulsation and reduce noise is disclosed.

Japanese Patent No. 3144611 Japanese Patent No. 3206221

  Patent Document 1 does not present a pulsation reducing means in the case of a compressor, and Patent Document 2 separately discloses a configuration in which the discharge chamber is devised as described above for discharge pulsation. However, the position of the second discharge chamber provided on the outer peripheral side of the center housing, which is presented in Patent Document 2, and the installation site of the communication path presented in Patent Document 1 are in a position where they interfere or are close to each other. Exists in the position. Therefore, if the volume of the second discharge chamber in Patent Document 2 is increased in order to enhance the discharge pulsation suppression and noise reduction effects, the cross-sectional area of the communication path provided in the fixed scroll member in Patent Document 1 is reduced. Undesirable suction pressure loss will occur. Therefore, from these two proposals, it is difficult to achieve both reduction of suction pressure loss, suppression of discharge pulsation, and noise reduction, and it is more difficult to achieve both of them while reducing the size and weight of the compressor. It is.

  Accordingly, an object of the present invention is to provide a scroll type fluid device that can reduce the suction pressure loss, suppress the discharge pulsation, and reduce noise while paying attention to the above problems.

  In addition, the object of the present invention is to achieve the above-mentioned compatibility, desirably to achieve a reduction in size and weight of the apparatus, and to achieve these with a simple improved structure, and to stably obtain a good product quality. It is an object of the present invention to provide a scroll-type fluid device that can be used.

  In order to solve the above problems, a scroll type fluid device according to the present invention integrally forms a spiral wrap on an end plate of a fixed scroll member, and integrally forms a spiral wrap on an end plate of a movable scroll member. Both scroll members are arranged such that the angles of the spiral wraps are shifted from each other and the side walls of the spiral wraps are in partial contact, and the orbiting scroll member revolves on a circular track while preventing rotation. The volume of the fluid pocket by moving the fluid pocket, which is a sealed space formed between the two spiral wraps, from the outer end of the spiral wrap toward the center or from the center to the outer end. In the scroll fluid device that changes the center, the fixed scroll member is disposed between the front housing and the rear housing of the scroll fluid device. The height of the end surface of the outer shell of the center housing is set to the height of the fixed scroll member by using the end plate of the fixed scroll member as a reference in the height direction. Lower than the height of the spiral wrap of the center housing, and surrounded by the shell forming portion of the center housing, the inner surface of the outer shell of the front housing, the spiral wrap of the fixed scroll member, and the end plate of the movable scroll member. In addition, a corridor-like space extending in the circumferential direction of the apparatus is formed. The scroll type fluid device according to the present invention forms a scroll type compressor when the fluid pocket is moved from the outer end portion toward the center portion, and the fluid pocket is directed from the center portion of the spiral wrap toward the outer end portion. In the case of being moved, a scroll type expander is configured.

  In such a scroll type fluid device according to the present invention, the height of the position of the outer shell shell end surface of the center housing is made lower than the height of the spiral wrap of the fixed scroll member, as shown in each embodiment described later. In addition, it is possible to efficiently form a gallery-like space extending in the circumferential direction of the apparatus at a position on the end plate side of the movable scroll member or the inner surface side of the front housing on the outer peripheral side of the spiral wrap of the fixed scroll member. That is, it is possible to efficiently form a corridor-like space extending in the circumferential direction of the apparatus at a location that has not attracted attention until now. When the scroll-type fluid device is configured as a scroll-type compressor, this corridor-like space is located at a midway location (passage location) of the suction fluid flow path from the suction chamber to the fluid pocket. By forming it in an appropriate shape, it can contribute to the reduction of suction pressure loss, and when it is configured in a scroll type expander, it is placed in the middle of the flow path of the expansion fluid from the fluid pocket to the discharge chamber (via place). Therefore, by forming in an appropriate shape, it is possible to contribute to reduction of discharge pressure loss and discharge pulsation. In addition, since the corridor space is formed by effectively using the location on the front housing side on the outer peripheral side of the spiral wrap of the fixed scroll member, the outer peripheral side of the spiral wrap of the fixed scroll member is formed with respect to the corridor space. In addition, various measures can be taken with respect to the location on the rear housing side (that is, the location on the rear housing side with respect to the corridor-like space and the location different in the apparatus axial direction that does not interfere with the location where the corridor-like space is formed). It becomes possible. For example, as will be described later, it is possible to efficiently form the second discharge chamber without particularly increasing the size of the compressor at this portion. By forming such a second discharge chamber, discharge pulsation is reduced and noise is reduced. Is possible. It is also possible to make the wall of the center housing of this part small (thin) appropriately, that is, it is possible to provide an appropriate meat stealing part, thereby reducing the size and weight of the device efficiently It becomes possible to do. Furthermore, it is possible to form the second discharge chamber using such a meat stealing portion.

Further, in the scroll type fluid device according to the present invention, the movable scroll member has the corridor-like space at a phase angle at which the distance between the spiral wrap outer peripheral end inner surface and the spiral wrap outer surface of the fixed scroll member facing the movable scroll member is maximum. The cross sectional area A1 of the port cross-sectional area A2 provided in the front housing is
A2 / 2 <A1 <A2
It can be set as the structure which satisfy | fills this relationship. A pair of fluid pockets having a phase angle shifted by approximately 180 degrees are formed between the spiral scrolls of the fixed scroll member and the movable scroll member. However, it is assumed that the fluid flows from the suction port provided in the front housing through the gallery space. Considering the suction path of the compressor into which the suction fluid is taken into the pocket, it is assumed that the suction fluid from the suction port is taken into each of the pair of fluid pockets in one rotation and passes through the corridor space. In order to avoid an increase in the suction pressure loss due to the fluid being compressed, it is preferable that the cross-sectional area A1 of the corridor-like space is ½ or more of the sectional area A2 of the suction port. Further, since an amount larger than the amount of fluid sucked from the suction port is not taken into each fluid pocket, the cross-sectional area A1 of the corridor-like space is a size corresponding to the sectional area A2 of the suction port at most. If there is enough. Therefore, in order to maintain the small and light weight of the entire apparatus without unnecessarily increasing the corridor space while obtaining the advantages as described above by forming the corridor space, the above relationship must be satisfied. preferable. In the case of the scroll type expander, the preferable relationship is the same as the flow direction of the fluid is reversed.

  Further, in the scroll type fluid device according to the present invention, the corridor-like space is located on the opposite side of the fixed scroll member with the end plate of the movable scroll member interposed therebetween, or the suction chamber for the suction fluid or the discharge chamber for the expansion fluid It is possible to have a structure that is always open. In such a structure, the corridor-like space is always opened to the suction chamber for suction fluid or the discharge chamber for expansion fluid, so that it is possible to move the fluid without causing large pressure loss or pulsation between them. Stable operation can be realized.

  Further, the front housing may have a structure in which a port that directly faces the corridor space is provided. In such a configuration, for example, the fluid sucked from the suction port always flows directly into the corridor-like space as it is, and is taken into the fluid pocket via the fluid. Therefore, a desired suction path is always stably formed, and stable operation is possible.

  Further, in the scroll type fluid device according to the present invention, a wall forming a wall surface contributing to a volume change of the fluid pocket of the spiral wrap of the fixed scroll member on the outer surface side of the outer shell of the center housing, and the corridor The concave outer surface of the outer shell shell having a predetermined thickness can be formed with respect to the wall forming the wall surface facing the shaped space. In such a structure, a concave outer surface is formed on the outer surface of the outer shell of the center housing adjacent to the corridor-like space, so that the apparatus can be reduced in size and weight by the amount corresponding to the concave outer surface. It becomes possible.

  The concave outer surface has a shape opened to the outside of the device in the radial direction. However, in the scroll type fluid device according to the present invention, an internal space can be provided. For example, between the wall forming the wall surface contributing to the volume change of the fluid pocket of the spiral wrap of the fixed scroll member and the wall forming the outer surface of the outer shell shell on the inner surface side of the outer shell shell of the center housing Moreover, it can be set as the structure where the bottomed meat stealing part extended in the same direction as the height direction of the spiral wrap of a fixed scroll member is provided. By forming such a meat stealing portion on the inner surface side of the outer shell of the center housing, it is possible to reduce the weight corresponding to the meat stealing portion. In addition, the meat stealer can be provided with various functions by adopting the following various forms.

  The meat stealing portion may take a form opening toward the rear housing side. At that time, it can be formed as a device internal space that is not directly opened to the outside of the device, thereby allowing various functions to be performed.

  For example, in the case of a scroll compressor, the meat stealing portion communicates with a first discharge chamber (a discharge chamber for fluid compressed by a spiral wrap) formed in the rear housing via a throttle portion. It can be set as the structure which forms. If such a second discharge chamber is formed following the first discharge chamber in the path of the discharge fluid, the second discharge chamber can have a buffer function against a fluid pulsation in the discharge path, and a silencer function, It is possible to obtain excellent discharge pulsation reduction and noise reduction effects.

  In such a structure, the discharge port for discharging the compressed fluid from the second discharge chamber to the outside of the apparatus can be provided in the center housing or can be provided in the rear housing. The selection can be made as appropriate according to the arrangement environment of the compressor, the relationship with other devices, and the like.

  Further, the structure of the throttle portion is not particularly limited. For example, the throttle portion is formed by an inner contour of a gasket for sealing between the center housing and the rear housing and an opening contour of the second discharge chamber. Is possible. In this way, it is not necessary to add a special member for forming the throttle portion.

  Further, in the case where the meat stealing portion that opens toward the rear housing side is provided as described above, the meat stealing portion communicates with the discharge chamber formed in the rear housing and stores oil in the discharge chamber. It is also possible to form a chamber. In such a configuration, an oil storage space can be substantially formed in the discharge chamber, and a desired compressor lubrication state can be obtained by allowing the stored oil to be appropriately returned to the drive unit on the suction side. Can do.

  In such a form, it is preferable that a filter is provided between the oil storage chamber and the discharge chamber. By installing the filter, it is possible to prevent foreign matters from flowing in when the oil returns. Moreover, it is preferable that the oil storage chamber and the corridor-like space communicate with each other through an orifice. An appropriate oil return amount can be ensured by the presence of the orifice.

  Further, when the meat stealing portion opened toward the rear housing side is provided as described above, a discharge chamber and a suction chamber are formed in the rear housing via a partition wall, and the suction chamber serves as the meat stealing portion. It is also possible to adopt a structure that communicates with the corridor-like space via a section. That is, a space similar to the above-described second discharge chamber is formed by the meat stealing portion, but this space portion is used as a part of the suction path. For example, this configuration is effective when it is necessary to provide a suction port and a discharge port in the rear housing due to restrictions on the arrangement of the equipment. Even in such a case, before the fluid is taken into the fluid pocket in the corridor space It can be formed as an effective space for reducing the suction pressure loss.

  Furthermore, when providing the above-mentioned bottomed meat stealing portion, it is also possible to adopt a form in which the meat stealing portion opens toward the opposite side of the rear housing, that is, the meat stealing portion opens toward the front housing. In this case, since the meat stealing portion formed adjacent to the corridor space opens toward the corridor space, the meat stealing portion communicates with the corridor space. Thus, a fluid path including a space formed by the meat stealing unit and a gallery-like space following the space is formed. In this case, it is also possible to adopt a structure in which the cross-sectional area of the meat stealing portion extending with an appropriate length in the circumferential direction of the device changes in the circumferential direction of the device. By appropriately changing the cross-sectional area in the circumferential direction of the device, for example, when configuring a fluid suction path consisting of a space formed by a meat stealing portion and a subsequent corridor-like space, the suction fluid enters the corridor-like space. It is possible to more smoothly perform the uptake and the uptake from the corridor space into the fluid pocket. In addition, the suction pressure loss can be further reduced by smoothly changing the cross-sectional area. Further, since the center housing is provided with a bottomed meat stealing portion that opens toward the front housing side, for example, in the case of a scroll compressor, the center housing (on the outer shell shell of the center housing) It is possible to provide a suction port to the stealer.

  As described above, the configuration of the scroll type fluid device according to the present invention can be applied to both the scroll type compressor and the scroll type expander. In particular, the suction pressure loss is reduced, the discharge pulsation is reduced, the noise is reduced. Is suitable as a compressor for a vehicle air conditioner which is strongly demanded to be reduced in size and weight.

  Thus, according to the scroll type fluid device of the present invention, when used as a compressor, it is possible to achieve both reduction of suction pressure loss, suppression of discharge pulsation, and noise reduction. Further, not only as a compressor but also as an expander, the pressure loss at the discharge side, particularly around the outer peripheral end of the movable side spiral wrap can be reduced.

  In addition, since the corridor-like space is formed by effectively using the portion including the center housing outer shell which has not been focused on in the past, the above-described performance improvement can be achieved efficiently. Compared to the structure, the center housing can be reduced in size and weight, and thus the entire apparatus can be reduced in size and weight while achieving the intended purpose.

  Further, if the concave outer surface or the meat stealing portion is formed in the center housing, the center housing can be further reduced in weight. Further, since the thick portion is eliminated and each portion can be configured to be relatively thin and have a relatively uniform thickness, it is possible to further reduce the weight of the center housing and thus the entire apparatus. In addition, when the center housing is formed by casting or the like, defects such as a cast hole can be made difficult to occur because the thickness can be made uniform, and the manufacturing quality is stabilized.

  Furthermore, the above meat stealing part can be used as various function exhibiting parts, contributing to the suppression of discharge pulsation and noise reduction, the formation of an oil storage space, stable lubrication by smooth return of oil to the drive part, etc. It is also possible.

It is the longitudinal cross-sectional view (A) of the scroll-type fluid apparatus which concerns on 1st embodiment of this invention, and the cross-sectional view (B) which concerns on the YY arrow of figure (A). It is the longitudinal cross-sectional view (A) of the scroll type fluid apparatus which concerns on 2nd embodiment of this invention, and the cross-sectional view (B) which concerns on the YY arrow of figure (A). It is the longitudinal cross-sectional view (A) of the scroll type fluid apparatus which concerns on 3rd embodiment of this invention, and the cross-sectional view (B) which concerns on the YY arrow of figure (A). It is the longitudinal cross-sectional view (A) of the scroll type fluid apparatus which concerns on 4th embodiment of this invention, and the cross-sectional view (B) which concerns on the YY arrow of figure (A). It is the longitudinal cross-sectional view (A) of the scroll type fluid apparatus which concerns on 5th embodiment of this invention, and the cross-sectional view (B) which concerns on the YY arrow of figure (A). It is a longitudinal cross-sectional view of the scroll type fluid apparatus which concerns on the 6th embodiment of this invention. It is a longitudinal cross-sectional view of the scroll type fluid apparatus which concerns on the 7th embodiment of this invention. It is a longitudinal cross-sectional view of the scroll type fluid apparatus which concerns on the 8th embodiment of this invention. It is a longitudinal cross-sectional view of the scroll type fluid apparatus which concerns on 9th embodiment of this invention. It is the longitudinal cross-sectional view (A) of the scroll type fluid apparatus which concerns on 10th embodiment of this invention, and the cross-sectional view (B) which concerns on the YY arrow of figure (A). It is a longitudinal cross-sectional view of the scroll type fluid apparatus which concerns on the 11th embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In the following embodiments, the case where the present invention is applied to a scroll type compressor will be described. However, as described above, the present invention is basically applicable to a scroll type expander.

  FIG. 1 shows a scroll compressor as a scroll fluid device according to a first embodiment of the present invention. In the scroll compressor 1 shown in FIG. 1, a spiral wrap 2 b is integrally formed on the end plate 2 a of the fixed scroll member 2, and a spiral wrap 3 b is integrally formed on the end plate 3 a of the movable scroll member 3. Has been. Both scroll members 2 and 3 are disposed such that the angles of the spiral wraps 2b and 3b are shifted from each other and the side walls of the spiral wraps 2b and 3b are partially in contact with each other. The movable scroll member 3 is revolved on a circular orbit while being prevented from rotating via a rotation preventing mechanism 4, and a fluid pocket 5 (a pair of sealed pockets) formed between the spiral wraps 2b and 3b. The fluid pocket formed is moved from the outer end of the spiral wrap toward the center (in the case of an expander, the fluid pocket is moved from the center toward the outer end). The volume is changed in the direction in which the volume is reduced, and the fluid (for example, refrigerant gas) taken into the fluid pocket 5 from the outer end side of the spiral wrap is compressed.

  The housing of the compressor 1 includes a front housing 6, a rear housing 7, and a center housing 8 disposed therebetween. In the present embodiment, the suction fluid is introduced into a suction chamber 10 from a suction port 9 provided in the front housing 6, and a part thereof is taken into the fluid pocket 5 through a gallery-like space described later. And subjected to compression. The compressed fluid is discharged into a discharge chamber 12 formed in the rear housing 7 through a discharge hole 11 formed in the center portion of the end plate 2 a of the fixed scroll member 2, and from there through a discharge port 13. Discharged outside.

  Reference numeral 14 denotes a drive shaft. The rotational drive force transmitted to the pulley 15 is transmitted to one end side of the drive shaft 14 via the electromagnetic clutch 16, whereby the drive shaft 14 is rotationally driven. A crank mechanism 17 is configured on the other end side of the drive shaft 14, and the movable scroll member 3 is driven to make a turning motion.

  The fixed scroll member 2 is formed integrally with the center housing 8 inside a center housing 8 disposed between the front housing 6 and the rear housing 7. Then, with the end plate 2a of the fixed scroll member 2 as a reference for the position in the height direction, the height of the end surface 8b of the outer shell 8a of the center housing 8 is higher than the height of the spiral wrap 2b of the fixed scroll member 2. Is set too low. The circumferential direction of the apparatus surrounded by the outer shell 8a forming portion of the center housing 8, the inner surface of the outer shell 6a of the front housing 6, the spiral wrap 2b of the fixed scroll member 2, and the end plate 3a of the movable scroll member 3. A corridor-like space 18 extending in the direction is formed. In this embodiment, the corridor space 18 communicates with the suction chamber 10 located on the opposite side of the fixed scroll member 2 with the end plate 3a of the movable scroll member 3 interposed therebetween.

  Further, in this embodiment, a wall that forms a wall surface that contributes to the volume change of the fluid pocket 5 of the spiral wrap 2 b of the fixed scroll member 2 on the inner surface side of the outer shell 8 a of the center housing 8, and the outer shell 8 a A bottomed meat stealing portion 19 extending in the same direction as the height direction of the spiral wrap 2b of the fixed scroll member 2 is provided between the wall forming the outer surface. In the present embodiment, the meat stealing portion 19 is open toward the rear housing 7 and communicates with the discharge chamber 12 formed in the rear housing 7.

  In the scroll compressor 1 configured as described above, by setting the height of the position of the end surface 8b of the outer shell 8a of the center housing 8 to be lower than the height of the spiral wrap 2b of the fixed scroll member 2, In the outer peripheral side of the spiral wrap 2 b of the fixed scroll member 2, the corridor-like space 18 extending in the circumferential direction of the device is efficiently used by effectively using a location that has not been noticed at all at the position on the inner surface side of the front housing 6. Can be well formed. The suction fluid can be taken into the fluid pocket 5 from the suction chamber 10 through the corridor space 18, and the corridor space 18 is positioned in the middle of the suction path, thereby reducing the suction pressure loss. It becomes possible to do.

  Further, the corridor space 18 is formed by utilizing a part of the portion occupied by the center housing 8 when viewed in the apparatus axial direction. Therefore, the corridor space 18 is utilized by using the remaining portion. It is possible to form the meat stealing portion 19 as shown in the figure adjacent to the. The meat stealing portion 19 can be formed without increasing the special device outer shape as compared with the structure in which the above-described conventional sub-housing is provided and the second discharge chamber is provided. Therefore, it is possible to reliably reduce the size and weight as compared with such a conventional structure. Since the volume of the discharge chamber 12 can be substantially increased by forming the meat stealing portion 19 in the illustrated example, it is possible to reduce the discharge pulsation and to reduce the noise through it. Furthermore, the formation of such a wall stealing portion 19 can prevent the center housing 8 from having a particularly thick portion, and the thickness of each portion can be made uniform. In the case of molding with, it becomes possible to prevent the occurrence of defects such as a cast hole, and it is possible to stabilize the quality in production.

  FIG. 2 shows a scroll compressor as a scroll fluid device according to a second embodiment of the present invention. In the scroll compressor 21 shown in FIG. 2, the bottomed meat stealing portion 23 formed in the center housing 22 opens toward the front housing 24 compared to the scroll compressor 1 shown in FIG. ing. A corridor space 25 is formed so as to communicate with the opening side of the bottomed meat stealing portion 23. And in this embodiment, it is set as the structure where the cross-sectional area of the meat stealing part 23 extended with an appropriate length in the apparatus circumferential direction is changing in the apparatus circumferential direction. For example, the width of the meat stealing part 23 in FIG. The wide part is formed deeper than the narrow part. Since the meat stealing portion 23 and the corridor-like space 25 communicate with each other so that the opening faces each other, the cross-sectional area of the corridor-like space 25 is substantially increased, and the corridor-like space 25 is crossed. The area changes in the circumferential direction of the apparatus. Since other configurations are the same as those in the first embodiment, the same reference numerals as those in FIG.

  In the scroll compressor 21 configured as described above, the suction fluid can be sucked more smoothly through the corridor-like space 25 in which the cross-sectional area is appropriately changed as compared with the first embodiment. This makes it possible to further reduce the suction pressure loss.

  FIG. 3 shows a scroll compressor as a scroll type fluid device according to a third embodiment of the present invention. The center housing according to the present invention is lighter than the above-described meat stealer. Along with the form, the relationship between the corridor space and the cross-sectional area of the suction port is shown. In the scroll compressor 31 shown in FIG. 3, compared to the scroll compressor 1 shown in FIG. 1, the fluid pocket 5 of the spiral wrap 2 b of the fixed scroll member 2 is provided on the outer surface side of the outer shell 32 a of the center housing 32. A concave outer surface 34 of the outer shell 32a having a predetermined thickness is formed on a wall 33a that forms a wall surface that contributes to a change in volume of the wall and a wall 33b that forms a wall surface facing the corridor space 18. It is supposed to be a structure. In such a structure, since the concave outer surface 34 is formed on the outer surface of the outer shell 32a of the center housing 32 adjacent to the corridor-like space 18, the apparatus is reduced in size and weight by the amount corresponding to the concave outer surface 34. It becomes possible to plan.

A desirable relationship between the cross-sectional areas of the corridor space 18 and the suction port 9 in the present invention will be described with reference to FIG. That is, when the movable scroll member 3 is at the position of the phase angle at which the distance between the outer peripheral end inner surface of the spiral wrap 3b and the outer surface of the spiral wrap 2b of the fixed scroll member 2 facing the movable scroll member 3 is the maximum, A1, If the cross-sectional area of the suction port 9 provided in the front housing 6 is A2,
A2 / 2 <A1 <A2
It is preferable that the relationship is satisfied. With such a configuration, as described above, a smooth suction operation can be ensured and the suction pressure loss can be reduced by the corridor space 18 having an appropriate size. Since there is no need to unnecessarily enlarge the corridor-like space 18, it is possible to promote reduction in size and weight of the entire apparatus. Since other configurations are the same as those in the first embodiment, the same reference numerals as those in FIG.

  FIG. 4 shows a scroll compressor as a scroll fluid device according to a fourth embodiment of the present invention. In the scroll compressor 41 shown in FIG. 4, compared to the scroll compressor 1 shown in FIG. 1, the front housing 42 is provided with a suction port 44 that directly faces the corridor space 43. 4B in FIG. 4B indicates the inner periphery of the front housing 42. In such a structure, the fluid sucked from the suction port 44 can always flow directly into the corridor space 43 and is taken into the fluid pocket 5 from there, so that the desired suction path is always stable. Thus, a stable inhalation operation is possible. Since the other configuration conforms to the first embodiment, the same reference numerals as those shown in FIG.

  FIG. 5 shows a scroll compressor as a scroll fluid device according to a fifth embodiment of the present invention. In the scroll compressor 51 shown in FIG. 5, compared to the scroll compressor 41 shown in FIG. 4, the meat stealer that opens toward the rear housing 7 and communicates with the discharge chamber 12 formed in the rear housing 7. When the portion 19 is provided, the meat stealing portion 19 is positioned on the lower side in the installation posture of the compressor 51, and the meat stealing portion 19 is configured to form an oil storage chamber 52 that stores oil in the discharge chamber 12. Yes. A filter 53 is provided between the oil storage chamber 52 and the discharge chamber 12, and the filter 53 prevents foreign matter and the like from flowing in when the oil returns. Further, the oil storage chamber 52 and the gallery-like space 18 are communicated with each other via an orifice 54 (small hole), and an appropriate amount of oil is returned to the suction side, in particular, to the drive unit therein through the orifice 54. It has become. In such a configuration, the oil storage space can be effectively formed in the discharge chamber 12 without particularly increasing the size of the compressor, and the stored oil can be appropriately returned to the drive unit on the suction side. Thus, a desirable compressor lubrication state can be obtained. Since other configurations are the same as those in the first embodiment, the same reference numerals as those in FIG.

  6 to 8 show a scroll type compressor as a scroll type fluid device according to sixth to eighth embodiments of the present invention. In the scroll compressors 61, 71, 81 shown in FIGS. 6 to 8, bottomed meat stealing portions 62, 72, 82 that open toward the rear housing 7 are formed, and the meat stealing portions 62, 72 are formed. , 82 are first discharge chambers 63, 73, 83 (discharge chambers of fluid compressed by the spiral wrap) formed in the rear housing 7 and second discharge chambers communicating with the throttle portions 64, 74, 84. Is forming. By forming such second discharge chambers 62, 72, 82 in the discharge fluid path following the first discharge chambers 63, 73, 83, fluid in the discharge path is provided in the second discharge chambers 62, 72, 82. Thus, it is possible to provide a buffer function and a silencer function against the pulsation of the nozzle, and to obtain excellent discharge pulsation reduction and noise reduction effects.

  In the scroll compressor 61 shown in FIG. 6, a discharge port 65 that discharges the compressed fluid from the second discharge chamber 62 to the outside of the apparatus is provided in the center housing 66. In the scroll compressor 71 shown in FIG. 7, a discharge port 75 from the second discharge chamber 72 is provided in the center housing 76, and the throttle portion 74 is provided between the center housing 76 and the rear housing 7. It is formed by the inner contour of the gasket 77 that performs sealing and the opening contour of the second discharge chamber 72, thereby eliminating the need to add a special member for forming the throttle portion 74. . In the scroll compressor 81 shown in FIG. 8, the discharge port 85 is provided not on the center housing 86 side but on the rear housing 7 side, and the fluid from the second discharge chamber 82 is discharged through the communication hole 87. It is discharged from the port 85 to the outside. The position at which the discharge port is arranged can be appropriately selected according to the arrangement environment of the compressor, the relationship with other peripheral devices, and the like. Since other configurations are the same as those in the first embodiment, the same reference numerals as those in FIG. 1 are attached to FIGS.

  FIG. 9 shows a scroll compressor as a scroll fluid device according to a ninth embodiment of the present invention. In the scroll compressor 91 shown in FIG. 9, the meat stealing portion 19 opened toward the rear housing 7 side in the scroll compressor 41 shown in FIG. 4 is replaced with the rear housing 7 as shown in FIG. Instead of communicating with the discharge chamber 12 formed inside, it is configured as a part of the suction path. That is, a discharge chamber 12 and a suction chamber 93 are formed in the rear housing 7 via a partition wall 92, and the suction chamber 93 communicates with the corridor space 18 and the communication path 94 via the meat stealing portion 19. It is the structure connected through. The rear housing 7 is provided with a suction port 95 that communicates with the suction chamber 93 and a discharge port 96 that communicates with the discharge chamber 12 at another position. Such a configuration is particularly effective when it is necessary to provide both the suction port 95 and the discharge port 96 in the rear housing 7 because of the relationship with the surrounding arrangement devices. Even in such a case, the corridor-like space 18 can be used as an effective space for reducing the suction pressure loss before the fluid is taken into the fluid pocket 5. Since other configurations are the same as those in the first embodiment, the same reference numerals as those in FIG.

FIG. 10 shows a scroll compressor as a scroll fluid device according to a tenth embodiment of the present invention. In the scroll compressor 101 shown in FIG. 10, the bottomed meat stealing portion 23 opened toward the front housing 24 side in the scroll compressor 21 shown in FIG. The center housing 103 is provided with a suction port 104 that directly communicates with the suction space formed by the meat stealing portion 23. The suction passage 102 can be efficiently formed by the meat stealing portion 23 and the gallery-like space 25. Thus, the form of the suction passage 102 can also be designed with a large degree of freedom. Since other configurations are the same as those in the first embodiment, the same reference numerals as those in FIG.

  FIG. 11 shows a scroll compressor as a scroll fluid device according to an eleventh embodiment of the present invention. The scroll compressor 111 shown in FIG. 11 has the same configuration as the scroll compressor 31 shown in FIG. 3, but in the eleventh embodiment, the compressor 111 is mounted at a predetermined location. The mounting boss 112 for this purpose is arranged farther from the position of the pulley 15 in the illustrated example than the clutch portion. That is, the distance L between the pulley 15 and the mount boss 112 is set larger. Conversely, it is possible to make L smaller. In this way, it is possible to design freely in consideration of the mounting convenience of the compressor 111. Since other configurations are the same as those in the first embodiment, the same reference numerals as those in FIG.

  The configuration of the scroll type fluid device according to the present invention is basically applicable to both a scroll type compressor and a scroll type expander, and in particular, reduction of suction pressure loss, reduction of discharge pulsation, reduction of noise, and further miniaturization. It is suitable for a compressor for a vehicle air conditioner that is strongly demanded for weight reduction.

1, 21, 31, 41, 51, 61, 71, 81, 91, 101, 111 Scroll compressor 2 as scroll type fluid device 2 Fixed scroll member 2a Fixed scroll member end plate 2b Fixed scroll member spiral wrap 3 Movable scroll member 3a Movable scroll member end plate 3b Movable scroll member spiral wrap 4 Rotation prevention mechanism 5 Fluid pockets 6, 24, 42 Front housing 7 Rear housing 8, 22, 32, 66, 76, 86, 103 Center housing 8a 32a Center housing outer shell 8b Center housing outer shell end face 9, 44, 95, 104 Suction port 10, 93 Suction chamber 11 Discharge hole 12 Discharge chamber 13, 65, 75, 85, 96 Discharge port 14 Drive shaft 15 Pulley 16 Electromagnetic clutch 17 Crank mechanism 1 , 25, 43 Corridor-like space 19, 23, 62, 72, 82 Meat stealing portion 33a, 33b Wall 34 Recessed outer surface 42a Inner circumference 52 of front housing Oil storage chamber 53 Filter 54 Orifice 62, 72, 82 Formed by meat stealing portion Second discharge chambers 63, 73, 83 First discharge chambers 64, 74, 84 Restriction portion 77 Gasket 87 Communication hole 92 Partition wall 94 Communication passage 102 Suction passage 112 Mount boss

Claims (20)

A spiral wrap is integrally formed on the end plate of the fixed scroll member, and a spiral wrap is integrally formed on the end plate of the movable scroll member. A fluid pocket, which is a sealed space formed between both spiral wraps, is disposed so that the side walls are partially in contact with each other and revolves on a circular orbit while the movable scroll member is prevented from rotating. In the scroll type fluid device that changes the volume of the fluid pocket by moving the spiral wrap from the outer end portion toward the center portion or from the center portion toward the outer end portion,
The fixed scroll member is formed integrally with the center housing in a center housing disposed between the front housing and the rear housing of the scroll type fluid device, and the end plate of the fixed scroll member is positioned in the height direction. The height of the position of the end surface of the outer shell of the center housing is lower than the height of the spiral wrap of the fixed scroll member, and the outer shell forming part of the center housing and the outer shell of the front housing A scroll-type fluid device is characterized in that a corridor-like space extending in the circumferential direction of the device is formed, surrounded by an inner surface of the device, a spiral wrap of the fixed scroll member, and an end plate of the movable scroll member. A port in which the cross-sectional area A1 of the corridor space is provided in the front housing at a phase angle at which the distance between the spiral wrap outer peripheral end inner surface of the movable scroll member and the spiral wrap outer surface of the fixed scroll member facing the movable scroll member is maximum. For the cross-sectional area A2 of
A2 / 2 <A1 <A2
The scroll type fluid device according to claim 1, wherein the relationship is satisfied.   The said corridor-like space is always opened in the suction chamber of the suction fluid or the discharge chamber of the expansion fluid which is located on the opposite side of the fixed scroll member with the end plate of the movable scroll member interposed therebetween. The scroll type fluid device as described.   The scroll type fluid device according to claim 1 or 2, wherein the front housing is provided with a port that directly faces the corridor space.   On the outer surface side of the outer shell of the center housing, a wall that forms a wall surface that contributes to the volume change of the fluid pocket of the spiral wrap of the fixed scroll member, and a wall that forms a wall surface facing the corridor space On the other hand, the scroll type fluid device according to any one of claims 1 to 4, wherein a concave outer surface of an outer shell having a predetermined thickness is formed.   Between the wall forming the wall surface contributing to the volume change of the fluid pocket of the spiral wrap of the fixed scroll member and the wall forming the outer surface of the outer shell shell on the inner surface side of the outer shell shell of the center housing The scroll fluid device according to any one of claims 1 to 4, wherein a bottomed meat stealing portion extending in the same direction as the height direction of the spiral wrap of the fixed scroll member is provided.   The scroll type fluid apparatus according to claim 6, wherein the meat stealing portion opens toward the rear housing.   The scroll type according to claim 7, wherein the meat stealing portion is formed of a scroll type compressor that forms a second discharge chamber communicating with a first discharge chamber formed in the rear housing via a throttle portion. Fluid device.   The scroll fluid device according to claim 8, wherein a discharge port from the second discharge chamber is provided in the center housing.   The scroll-type fluid device according to claim 8, wherein the throttle portion is formed by an inner contour of a gasket that seals between the center housing and a rear housing and an opening contour of the second discharge chamber. .   The scroll type fluid device according to claim 8, wherein a discharge port from the second discharge chamber is provided in the rear housing.   8. The scroll type according to claim 7, wherein the meat stealing portion includes a scroll type compressor that communicates with a discharge chamber formed in the rear housing and forms an oil storage chamber for storing oil in the discharge chamber. Fluid device.   The scroll type fluid device according to claim 12, wherein a filter is provided between the oil storage chamber and the discharge chamber. The scroll fluid device according to claim 12 or 13 , wherein the oil storage chamber and the corridor space are communicated with each other via an orifice.   A discharge chamber and a suction chamber are formed in the rear housing via a partition, and the suction chamber is formed of a scroll compressor that communicates with the corridor space via the meat stealing portion. The scroll type fluid device according to claim 7.   The scroll type fluid device according to claim 6, wherein the meat stealing portion is open toward the front housing side.   The scroll type fluid device according to claim 16, wherein a cross-sectional area of the meat stealing portion changes in a circumferential direction of the device.   The scroll type fluid device according to claim 16 or 17, wherein the meat stealing unit communicates with the corridor space.   The scroll type fluid device according to claim 18, comprising a scroll type compressor, wherein a suction port to the meat stealing portion is provided in a center housing.   The scroll type fluid device according to any one of claims 1 to 19, which is used as a compressor for a vehicle air conditioner.

Images