JP6000449B2 - Scroll compressor - Google Patents

Description

  The present invention relates to a scroll compressor.

  As background art of this technical field, there is JP 2013-19322 A (Patent Document 1). According to this publication, “a fixed scroll has a release valve device that opens a circuit so that the compression chamber communicates with the discharge pressure chamber when the pressure in the compression chamber rises above a set pressure. A release passage that communicates with the discharge pressure chamber, a release valve that opens and closes the release passage, a valve pressing body that applies an elastic pressing force to the release valve disposed between the release valve and the retainer, and a valve pressing body A retainer that limits the movement range of the release valve, and the release pressure of the release valve is pressed against the retainer by the elastic pressing force in any state of closing the release flow path and opening the release flow path. As a result, “the deformation of the retainer and the valve pressing body due to the collision and the collision noise are suppressed while the deformation to the fixed scroll due to the press-fitting of the valve pressing body when the release valve device is arranged is suppressed. To suppress, it is described that can "to enhance the performance and reliability of the scroll compressor (see Abstract).

JP 2013-19322 A JP 2011-89499 A

  With the structure of the release valve device disclosed in Patent Document 1, the valve pressing body is pressed against the retainer by the elastic pressing force in both the state where the release valve closes the release flow path and the state where the release flow path opens. . Accordingly, it is described that, in addition to the generation of the collision sound between the retainer and the valve pressing body, the deformation of the retainer or the valve pressing body due to the collision can be suppressed, and the reliability can be improved. As described above, the structure in which the valve pressing body is always suppressed from the upper part by the retainer suppresses the movement of the valve pressing body in the vertical direction, and the sound and deformation due to the collision are reduced.

  FIG. 5 shows the upper part of the fixed scroll of Patent Document 1. Here, Patent Document 1 does not mention the reliability of the release valve when the discharge port and the release hole position in FIG. 5 are adjacent to each other.

  Patent Document 2 aims to increase the compression efficiency in the overcompression region and increase the overall compression efficiency through the entire operation compression ratio region including the insufficient compression region. For this reason, when release valve devices are provided in the two compression chambers closest to the fixed scroll discharge port, the release hole positions provided in either the discharge port or the compression chamber are necessarily adjacent to each other. Become. In order to improve the escape of the working fluid, it is naturally effective to increase the diameter of the release hole. Therefore, a hole corresponding to the discharge port of the retainer (first hole) and a hole corresponding to the release valve device ( The thickness between the second hole) and the first hole is connected to the second hole. Furthermore, when the compressor capacity exceeds 5 horsepower, the amount of release of the working fluid increases, which may cause insufficient retainer strength and deformation of the valve pressing body, resulting in a decrease in reliability. Arise.

  Therefore, an object of the present invention is to provide a compressor that improves the reliability by suppressing the deformation of the pressing portion and the release valve receiver when a release valve device is provided.

  In order to solve the above problems, for example, the configuration described in the claims is adopted.

The present application includes a plurality of means for solving the above problems.
"A fixed scroll and a orbiting scroll that meshes with the fixed scroll and forms a compression chamber by orbiting the fixed scroll; and
A scroll compressor comprising: an electric motor that drives the orbiting scroll through a crankshaft;
A release valve device that allows the working fluid to flow from the compression chamber to the discharge pressure space by communicating the compression chamber and the discharge pressure space above the fixed scroll;
The release valve device includes: a release valve that opens and closes a flow path of a release hole that communicates with the compression chamber; a release valve receiver that receives the release valve when the release valve is opened; and the release valve receiver A pressing portion that presses the release valve receiver from above when releasing pressure, and the pressing portion includes a first hole corresponding to a discharge port of the fixed scroll that allows the working fluid compressed in the compression chamber to flow; A second hole corresponding to the release valve device is formed, and the first hole and the second hole are not communicated with each other,
Furthermore, by disposing the first hole at a position away from the second hole, the first hole and the discharge port are formed so as not to partially overlap.

  ADVANTAGE OF THE INVENTION According to this invention, while improving the compressor efficiency in a whole compression ratio area | region with a release valve apparatus, the deformation | transformation of a holding | suppressing part and a release valve receptacle can be suppressed, and the reliability of a scroll compressor can be improved. Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is a figure explaining the structure of the scroll compressor of Example 1. FIG. FIG. 3 is a cross-sectional view of the basic configuration of a fixed scroll and a turning scroll of the scroll compressor according to the first embodiment. The top view seen from the upper side of the fixed scroll 5 is shown. The sectional view which looked at an example of release valve device 20 from the horizontal direction is shown. FIG. 5A is a view of the release valve receiver 21b as viewed from above, and FIG. 5B is a view of the release valve receiver 21b as viewed from below. It is a figure for demonstrating the release valve apparatus 20 of Example 1. FIG. The figure for demonstrating the release valve apparatus 20 of Example 1 from the direction 90 degree different from the direction seen in the lower figure of Fig.6 (a) is shown. It is a figure for demonstrating the shape of the release valve receptacle 21b of Example 1. FIG. It is a figure explaining the relationship between the compression chambers 16a and 16b and the release hole 20a in the compression process of Example 1. FIG. It is a figure for demonstrating the structure of the holding | suppressing part 22 of Example 1. FIG. It is a figure for demonstrating the release valve apparatus 20 of Example 3. FIG. FIG. 6 is a diagram for explaining a configuration of a scroll compressor according to a fourth embodiment. It is a figure for demonstrating the structure of the release valve receptacle 21b of Example 5. FIG. It is a figure for demonstrating the structure of the release valve apparatus 20 of Example 6. FIG. It is a figure for demonstrating the structure of the release valve apparatus 20 of Example 6. FIG. It is a figure for demonstrating the structure of the release valve apparatus 20 of Example 7. FIG. It is a figure for demonstrating the shape of 5 d of fixed scroll discharge outlets of Example 7. FIG. It is a figure for demonstrating the structure of the release valve apparatus 20 of Example 8, and the shape of 5 d of fixed scroll discharge ports.

  Hereinafter, examples will be described with reference to the drawings.

  In this embodiment, even when a release valve device is provided to increase the overall compression efficiency through the entire operation compression ratio region including the overcompression region and the undercompression region, the retainer and the valve pressing body are not deformed. The compressor which suppresses and improves reliability is demonstrated.

FIG. 1 is a diagram illustrating the configuration of the scroll compressor according to the present embodiment.
The scroll compressor 1 includes a compression mechanism unit 2, an electric motor 3 that drives the compression mechanism unit 2, and a sealed container 4 that houses the compression mechanism unit 2, the electric motor 3, and the like. The compressor of the present embodiment is a vertical scroll compressor in which the compression mechanism 2 is disposed in the upper part, the electric motor 3 is disposed in the middle, and the oil reservoir 15 is disposed in the lower part in the closed container 4.

  The sealed container 4 is configured by welding a lid cap 4b and a bottom cap 4c vertically to a cylindrical chamber 4a. The lid cap 4b is provided with a suction pipe 4d, and a discharge pipe 4e is attached to the side surface of the cylindrical chamber 4a. A discharge pressure space 4 f serving as a discharge pressure is accommodated in the sealed container 4. In addition, the compression mechanism 2 and the electric motor 3 are accommodated in the discharge pressure space 4f.

  The compression mechanism unit 2 includes a fixed scroll 5, a turning scroll 6, a frame 7, and the like as basic elements. The fixed scroll 5 and the frame 7 are fastened with bolts, and the orbiting scroll 6 is supported by the frame 7.

  The fixed scroll 5 includes a disk-shaped top plate portion (fixed side plate portion 5b), a spiral fixed side wrap 5a erected on the inner peripheral portion of the lower portion of the fixed side plate portion 5b, and a wrapping on the outer peripheral portion of the fixed side plate portion 5b. The upper surface 5g of the cylindrical fixed side plate portion 5b provided so as to surround 5a, and the suction port 5c and the discharge port 5d provided on the upper side of the fixed side plate portion 5b are configured and fixed to the frame 7 with bolts. Has been.

  The orbiting scroll 6 includes a disk-like orbiting side plate portion 6b on the side where the fixed side wrap 5a of the fixed scroll 5 is erected, a spiral orbiting orbiting side wrap 6a that is erected on the inner peripheral side of the orbiting side plate portion 6b, and the like. It is comprised. The orbiting scroll 6 is disposed so as to be freely rotatable so that the fixed scroll 5 and the lap of each other mesh with each other and a compression chamber 16 is formed. An eccentric pin portion 9b of the crankshaft 9 is connected to the back side of the orbiting scroll 6 (the lower side in FIG. 1 and the front side in FIG. 2). As the orbiting scroll 6 orbits with respect to the fixed scroll 5, a compression operation is performed in which the volume thereof is reduced.

  FIG. 2 shows a cross-sectional view of the basic configuration of the fixed scroll and the orbiting scroll of the scroll compressor of this embodiment. As the orbiting scroll 6 orbits with respect to the fixed scroll 5, a compression operation is performed in which the volume thereof is reduced.

  Each scroll wrap (fixed side wrap 5a, turning side wrap 6a) is formed with a circular involute curve or the like as a basic curve, and is formed outside the wrap on the winding end side of the turning scroll 6 by engaging both scrolls with each other. The outer-line-side compression chamber and the inner-line-side compression chamber formed on the inner side thereof are different in size and have an asymmetric scroll shape formed with a phase shifted by about 180 ° with respect to the rotation of the shaft. The outer peripheral side of the frame 7 is fixed to the inner wall surface of the sealed container 4 by welding or the like, and includes a main bearing 8 that rotatably supports the crankshaft 9.

  An Oldham ring 10 is disposed between the back side of the orbiting scroll 6 and the frame 7. The Oldham ring 10 is mounted in a groove formed on the back side of the orbiting scroll 6 and a groove formed on the frame 7 and receives the eccentric rotation of the eccentric pin portion 9b of the crankshaft 9 without the orbiting scroll 6 rotating. Arranged to revolve.

  The electric motor 3 includes a stator 3b and a rotor 3a. The stator 3b is fixed to the sealed container 4 by press fitting, shrink fitting or the like. The rotor 3a is rotatably arranged inside the stator 3b. The rotor 3 a is fixed to the crankshaft 9, and the orbiting scroll 6 is caused to orbit through the crankshaft 9 as the rotor 3 a rotates.

  The crankshaft 9 is composed of a main shaft 9a and an eccentric pin portion 9b, and is supported by a main bearing 8 and a sub-bearing 11 provided on the frame 7. The eccentric pin portion 9b is eccentrically formed integrally with the crankshaft 9a, and is inserted into the orbiting bearing 6d formed on the back surface of the orbiting scroll 6. The crankshaft 9 is driven by the electric motor 3, and the eccentric pin portion 9b drives the orbiting scroll 6 by performing an eccentric rotational movement with respect to the main shaft 9a. The crankshaft 9 is provided with an oil supply passage 9c for introducing lubricating oil to the main bearing 8, the auxiliary bearing 11, and the slewing bearing 6d. The oil is pumped up to the lower end of the oil reservoir 15 and guided to the oil supply passage 9c. A pump unit 14 is attached.

  The auxiliary bearing 11 is fixed to the sealed container 4 via the housing 12 and the lower frame 13. The auxiliary bearing 11 rotatably holds one end of the crankshaft main shaft portion 9a on the oil reservoir side using a slide bearing, a rolling bearing, a spherical bearing member, or the like.

  When the orbiting scroll 6 is orbitally moved through the crankshaft 9 driven by the electric motor 3, the wraps of the orbiting scroll 6 and the fixed scroll 5 are engaged with each other, and two compression chambers having different sizes (inner side compression chamber, outer line) Side compression chambers) are alternately formed with a phase difference of 180 °. Then, the working fluid such as the refrigerant gas is guided from the suction pipe 4d to the compression chamber 16 formed by the orbiting scroll 6 and the fixed scroll 5, and the volume of the refrigerant gas is reduced and compressed as it moves toward the center of the scroll. Is called. The compressed refrigerant gas is discharged from the discharge port 5d provided at the upper center of the fixed side plate portion 5b of the fixed scroll 5 to the discharge pressure space 4f in the sealed container 4 and circulates around the compression mechanism portion 2 and the electric motor 3. Then, it flows out from the discharge pipe 4e to the outside. Therefore, this is a high-pressure chamber type compressor in which the space in the hermetic container 4 is maintained at the pressure of the discharge pressure space 4f (referred to as discharge pressure).

  Next, the lubricating oil supply path will be described. A back pressure chamber 17 is formed between the back side of the orbiting scroll 6 and the frame 7, which is a pressure state that is intermediate between the pressure in the suction pipe 4 d and the discharge pressure in the discharge pressure space 4 f. The back pressure chamber 17 is provided in a path through which the lubricating oil passes from the oil reservoir 15 through the oil supply passage 9 c and lubricates the slewing bearing 6 d and then is supplied to the sliding portion of the compression mechanism portion 2. The revolving side plate 6 b of the orbiting scroll 6 is provided with a back pressure hole 6 c for intermittently communicating the compression chamber 16 and the back pressure chamber 17 formed on the back side of the orbiting scroll 6. Is maintained at an intermediate pressure between the suction pressure and the discharge pressure (this intermediate pressure is referred to as a back pressure). The orbiting scroll 6 is pressed against the fixed scroll 5 from the back by the resultant force of the back pressure and the discharge pressure acting on the central space on the inner peripheral side of the seal member 18.

  Next, the release valve device 20 disposed on the fixed scroll 5 will be described with reference to FIGS.

  FIG. 3 shows a top view of the fixed scroll 5 as viewed from above. The release valve device 20 is a device for releasing pressure from the compression chamber 16 to the discharge pressure space 4f during overcompression when the pressure in the compression chamber 16 in FIG. 1 is equal to or higher than the discharge pressure. The release valve device 20 is disposed at a plurality of locations of the fixed scroll 5 as shown in FIG. 3 corresponding to the plurality of compression chambers 16 formed by the fixed scroll 5 and the orbiting scroll 6.

  Gas refrigerant or liquid refrigerant, mist-like lubricating oil, or the like is drawn into the compression chamber 16 as a working fluid from the suction port 5c of the fixed scroll 5 depending on operating conditions. In the process in which the working fluid is compressed by the orbiting movement of the orbiting scroll 6, the pressure in the compression chamber 16 may be overcompressed so as to be equal to or higher than the discharge pressure. The release valve device 20 is closed during normal operation, but the release valve device 20 is opened during such overcompression. Thereby, the pressure can be released from the compression chamber 16 to the discharge pressure space 4f by the communication between the compression chamber 16 and the discharge pressure space 4f.

  FIG. 4 shows a cross-sectional view of an example of the release valve device 20 viewed from the lateral direction. The release valve device 20 includes a release valve 20b that opens and closes a flow path of a release hole 20a that communicates with the compression chamber 16, and an elastic body 21a that presses the release valve 20b in a direction to close the flow path of the release hole 20a when the valve is closed. A release valve receiver 21b for holding the elastic body 21a and receiving the release valve 20b when the valve is opened, and a release valve receiver for holding the release valve receiver 21b so as not to move to the opposite side of the compression chamber 16 when the pressure is released. It is comprised from the holding | suppressing part 22 which presses 21b from the upper side. The holding | suppressing part 22 restrict | limits the moving range of the release valve receptacle 21b. In the present embodiment, a space for connecting the compression chamber 16 formed in the fixed scroll 5 and the discharge pressure space 4f to place the release valve device 20 will be referred to as a release valve device space 20e. The holding part 22 holds the release valve receiver 21b so as not to move to the discharge pressure space 4f.

  FIG. 5A is a view of the release valve receiver 21b as viewed from above, and FIG. 5B is a view of the release valve receiver 21b as viewed from below. The release valve 21b is formed of a sintered metal or a carbon steel material, and a central relief hole 21c and a peripheral relief hole 21d are formed.

  Further, the release valve receiver 21b is formed in a cylindrical shape, and as shown in FIG. 4, a convex portion is provided on the lower portion so as to protrude toward the compression chamber 16, and one end of the elastic member 21a is integrally formed by press-fitting into the convex portion. Composed in combination. This convex part is comprised so that a diameter may become small as it goes to the compressor side. A disc-like or different-diameter release valve 20b is attached to the elastic member 21a, and the release valve 20b acts to close the release hole 20a when the valve is closed by the biasing force of the elastic member 21a toward the compression chamber 16 side. . Further, when the valve is closed, the release valve 20 b comes into contact with the annular valve seat portion 20 c of the fixed scroll 5. Here, a space formed between the release valve receiver 21b and the release valve 20b is referred to as a release valve chamber 20d.

  The release hole 20a is formed to have a small diameter, and the release valve chamber 20d is formed with a larger diameter hole than the release hole 20a. Since the volume of the release hole 20a becomes a part of the volume of the compression chamber 16 and becomes a dead volume accompanied by re-expansion loss of the gas remaining in the compression stroke, the volume of the release hole 20a is preferably suppressed as much as possible. Further, in order to ensure a sufficient release flow path so as not to impair the function of escaping the working fluid, the diameter of the hole forming the release valve chamber 20d is made larger than the diameter of the release hole.

  FIG. 4B shows a state in which the release member 20b is opened by the action of the elastic member 21a to contract, and the working fluid flows from the compression chamber 16 to the discharge pressure space 4f to release the pressure. At this time, the working fluid in the compression chamber 16 flows from the release hole 20a to the release valve chamber 20d, and further flows to the central relief hole 21c and the peripheral relief hole 21d formed in the release valve receiver 21b and to the discharge pressure space 4f. In this way, a release flow path for the working fluid is formed by the release valve device 20 from the release hole 20a to the release valve chamber 20d, further to the center relief hole 21c and the surrounding relief hole 21d.

  At this time, the release valve 20b moves away from the valve seat portion 20c so as to contact the release valve receiving portion 21e formed on the convex portion of the release valve receiving portion 21b. As described above, the release valve device 20 has a release valve device space between the upper surface 5g of the fixed base plate portion 5b of the fixed scroll 5 and the lower inner peripheral surface 5h so as to communicate the compression chamber 16 and the discharge pressure space 4f. 20e. Further, as shown in FIG. 4, the release valve device space 20e includes an upper large-diameter portion and a lower small-diameter portion in the fixed scroll 5 in order to restrict the release valve receiver 21b from approaching the release hole 20a more than necessary. In this way, it is configured in a two-stage shape. The release valve receiver 21b is formed of a cylindrical body, has an outer diameter slightly smaller than the inner diameter of the release valve device space 20e, and can move in the vertical direction at the upper large diameter portion in the release valve device space 20e. There is a gap.

  In the structure shown in FIGS. 4 and 5, the compression chamber 16 is overcompressed, and the release valve 20b and the release valve receiver 21e of the release valve receiver 21b come into contact when the working fluid pushes up the release valve 20b. Then, as shown in FIG. 5B, the release valve receiver 21b receives the load from the release valve 20b only by the release valve receiver 21e. For this reason, the release valve receiving portion 21e of the release valve receiver 21b may be worn out, leading to a decrease in reliability. On the other hand, there is a means for nitriding the surface of the release valve receiving portion 21e to increase the hardness and improve the reliability.

  However, this means has a problem that the cost of the nitriding treatment increases and the counterpart valve is likely to be worn depending on the hardness improvement of the release valve receiving portion 21e. In addition, there is a risk that reliability may be reduced due to variations in surface treatment, and further, if wear progresses beyond the treatment layer due to the fact that the wear is not completely prevented by the surface treatment, there is a risk that reliability will also be reduced. . Therefore, in this embodiment, a structure that improves the reliability by lowering the surface pressure of the release valve receiving portion 21e will be described below.

  6 and 7 are views for explaining the structure of the release valve device 20 for improving the reliability.

  6A and 6B are views for explaining the release valve device 20 of the present embodiment. The upper view of FIG. 6A is a view of the release valve device 20 as viewed from the discharge pressure space 4f side (upper side), and the lower view is a cross-sectional view taken along the line AA of the upper view. 6B is a view of the release valve device 20 viewed from the discharge pressure space 4f side (upper side) as in the upper view of FIG. 6A, and the lower view is a cross-sectional view taken along the line BB in the upper view. Indicates. 4 and 6, the inner diameter of the release valve device space 20e is not changed. In this case, as shown in the lower diagram of FIG. 6A and the lower diagram of FIG. 6B, a convex portion is formed in the lower part of the release valve receiver 21b as in FIG. 4, and the elastic member 21a is attached thereto. 6 (a), (b), and FIG. 7, the same reference numerals as those in FIG. 4 are basically the same and will not be described. However, the shape of the release valve receiver 21b is mainly different from that in FIG.

  FIG. 7 is a view for explaining the shape of the release valve receiver 21b in this embodiment. 7A is a view of the release valve receiver 21b viewed from the discharge pressure space 4f side (upper side), and FIG. 7B is a view of the release valve receiver 21b viewed from the pressure chamber 16 side (lower side). Show. As shown in FIGS. 6 and 7, the release valve receiver 21 b of this embodiment has a shape obtained by removing two end faces that are symmetrically positioned on the outer peripheral side from the release valve receiver 21 b of FIG. 4.

  Here, the release valve receiver 21b is held in a release valve device space 20e that is formed in the fixed scroll 5 and communicates the compression chamber 16 and the discharge pressure space 4f. The outer peripheral side wall surface of the release valve receiver 21b has a shape in which a gap with the inner wall of the release valve device space 20e becomes large at a plurality of symmetrical positions. 6 (a) and 6 (b) form a surrounding relief hole 21d, and when the valve is opened, the working fluid flows into the discharge pressure space 4f through the relief hole 21d.

  In the present embodiment, as shown in FIG. 7, as described above, the release valve device space 20 e of the release valve device space 20 e is formed by forming recesses 21 f that are recessed toward the inner peripheral side at two positions in the symmetrical position on the outer peripheral side of the release valve receiver 21 b. A gap with the inner wall (a surrounding relief hole 21d) is formed.

  The lower part of FIG. 6B shows a gap (surrounding relief hole 21d) formed by the inner wall of the release valve device space 20e and the recess 21f of the release valve receiver 21b. When the valve on the right side of FIG. 6B is opened, the working fluid from the release hole 20a flows into the release valve chamber 20d, and then flows through a gap formed on the left and right in the drawing (the surrounding relief hole 21d). It flows into the pressure space 4f. 4 and 5, a release hole 21c in the center is formed in the release valve receiver 21b, and the working fluid in the release valve chamber 20d also flows into the release hole 21c in the center to apply pressure to the discharge pressure space 4f. Acts to escape. In addition, although the recessed part 21f of the release valve receptacle 21b is provided in two places in FIG. 6, FIG. 7, if there is a symmetrical relationship, it may not be limited to two places, and several recessed parts may be formed.

  As shown in FIG. 7B, a release valve receiving portion 21e is formed on the convex portion of the lower portion of the release valve receiving portion 21b of the present embodiment in the same manner as in FIGS. It has become. Here, in this embodiment, a second release valve receiving portion 21h is further formed on the outer peripheral side of the release valve receiving portion 21e. Thus, the first release valve receiving portion 21e and the second release valve receiving portion 21h are connected to each other. It is the structure which receives the release valve 20b at the time of valve opening in two places.

  Thereby, according to the release valve device 20 of the present embodiment, the contact surface with the release valve 20b can be enlarged while securing the flow path of the working fluid by the central escape hole 21c and the peripheral escape hole 21d. Reliability can be improved.

  Here, the operation of the release valve 20b will be specifically described. A release flow path constituted by a release hole 20a, a release valve chamber 20d, and a gap (peripheral escape hole 21d) formed by the recess 21f is formed in the vertical direction. At this time, the release valve 20b is configured to receive the load of the release valve receiver 21b and the elastic pressing force of the elastic member 21a. Therefore, when the working fluid in the compression chamber 16 is compressed to a set pressure (discharge pressure + pressure due to the weight of the release valve + elastic pressing force of the elastic material) or more, the release valve is opened. Therefore, the operating pressure (pressure due to the weight of the release valve + elastic pressing force of the elastic material) is about several kPa, and the pressure rise accompanying the orbiting motion of the orbiting scroll 6 in the compression chamber 16 (in the case of the R410A mixed refrigerant, 1 to The operating pressure is slight with respect to about 3 MPa).

  The elastic material 21a of the present embodiment is a coil spring, is attached to a convex portion at the lower part of the release valve receiver 21b, and moves integrally with the release valve receiver 21b. Further, by making the end of the coil spring constituting the elastic member 21a a tightly wound portion, it becomes difficult to come off after being assembled to the release valve receiver 21b, and the coil spring can be prevented from coming off.

  The release valve device 20 is pressed by the release valve receiver 21b by the elastic pressing force of the elastic member 21a in either the state where the release valve 20b closes the release flow path or the state where the release valve 20b opens the release flow path. It is configured to be pressed against the portion 22. The state in which the release valve receiver 21 b is pressed against the pressing portion 22 is a state in which the release valve receiver 21 b is in contact with the pressing portion 22. This is a state in which a reaction force from the pressing portion 22 is applied to the elastic material 21a.

  As shown in FIG. 3, the holding portion 22 has working fluid escape holes 22 a and 22 b and is attached by an upper surface 5 g of the fixed side plate portion 5 b of the fixed scroll 5 and a bolt 23. The holding portions 22 for the release valve devices 20 provided at a plurality of locations are formed by a single member and processed by press forming of a steel plate or laser processing.

  Here, in the structure shown in Patent Document 2, as shown in FIG. 2, release holes 20 a are respectively provided in the two compression chambers 16 a and 16 b closest to the discharge port 5 d of the fixed scroll 5. The compression chambers 16a and 16b are paired with respect to the spiral center. The release holes 20a are arranged asymmetrically with respect to the spiral center.

  FIG. 8 is a diagram illustrating the relationship between the compression chambers 16a and 16b on the high pressure side and the release hole 20a in the compression process. As shown in FIGS. 8A to 8D, in a state where at least one of the high pressure side compression chambers 16a and 16b communicates with the fixed scroll discharge port 5d, the outer line side compression chamber 16a and the inner line side compression chamber 16b. Any one of the release holes 20a provided in is disposed at a position communicating with the discharge port 5d. The state of the release hole 20a in FIG. 8 is in the middle of compression, and since the compression chambers 16a, 16b and the discharge port 5d are not in communication, none of the release holes are in communication with the discharge port 5d. Is shown. This not only suppresses excessive compression input due to the overcompressed state, but also reduces the discharge pressure loss because it becomes a flow path for discharging the working fluid in addition to the discharge port 5d of the fixed scroll 5 when the release valve 20b is opened. Can play a role.

  FIG. 9 is a view for explaining the structure of the pressing portion 22 of this embodiment. In the present embodiment, the holding portion 22 has a discharge port escape hole 22a at the center and four release valve escape holes 22b around it. Note that the number of release valve relief holes 22b is not limited to four. The discharge port escape hole (first hole) 22a provided in the holding portion 22 in FIG. 9A passes the working fluid compressed in the compression chamber 16 through the discharge pressure space 4f, and thus is provided in the discharge port 5d of the fixed scroll 5. This is a relief hole provided.

  As shown in FIG. 8, four release holes 20a are formed in the fixed scroll 5 of the present embodiment, and release valve devices 20 for flowing the working fluid from the release holes 20a to the discharge pressure space 4f are respectively arranged. The The four release valve relief holes 22b in FIG. 9 are arranged corresponding to the release valve device 20, respectively.

Here, in FIG. 8, among the four release holes 20a, the release hole 20a disposed in the high-pressure-side inner compression chamber 16b is discharged from the fixed scroll 5 with respect to the release hole 20a disposed in the outer-line compression chamber 16a. The positional relationship approaches the outlet 5d.
Then, in the holding portion 22, a discharge port relief hole 22a formed corresponding to the discharge port 5d and a release valve relief hole 22b formed corresponding to the release hole 20a closest to the discharge port 5d (left in FIG. 9). Therefore, the positional relationship with the release valve relief hole 22b) that is formed second is also closer.

  At this time, as shown in FIG. 9 (a), the distance between the discharge port escape hole 22a and the release valve escape hole 22b closest to the discharge port escape hole 22a becomes small, so that The thickness between the release valve relief hole 22b and the nearest release valve 22b becomes smaller. If this thickness is small, it is considered that the strength is not sufficient. For example, there is a possibility that the thickness may be damaged due to an impact when the release valve 20b is opened, leading to a decrease in reliability.

  Further, as shown in FIG. 9B, it is conceivable that the discharge port escape hole 22a communicates with the release valve escape hole 22b closest thereto. However, in this case, as shown in the lower diagram of FIG. 9B, the release valve receiver 21b comes into contact with only one side (the left side in the figure) with respect to the pressing portion 22, so that the release valve receiver 21b is deformed. There is a possibility that it may lead to a decrease in reliability.

  Although it is conceivable to reduce the diameter of the release hole 22a in order to ensure the thickness, in this case, when the working fluid, particularly the liquid refrigerant is included, the release action of the working fluid by the release valve device 20 is deteriorated. You will not be able to achieve your goal.

  Therefore, in this embodiment, the structure shown in FIG. 9C is adopted. As shown in FIG. 9 (c), the holding portion 22 attached to the upper surface 5g of the fixed side plate portion 5b has a discharge port relief hole 22a corresponding to the discharge port 5d of the fixed scroll 5 through which the working fluid compressed in the compression chamber 16 flows. (First hole) and a release valve relief hole 22b (second hole) corresponding to the release valve device 20 for flowing the working fluid over-compressed in the compression chamber 16 are formed. The discharge port relief hole 22a (first hole) and the release valve relief hole 22b (second hole) are not in communication with each other. The discharge port escape hole 22a (first hole) is arranged at a position away from the release valve escape hole 22b (second hole), so that it does not partially overlap the discharge port 5d of the fixed scroll 5. The

  Originally, it is desirable to arrange each of the discharge ports 5d so that the shapes of all the discharge ports 5d overlap with the discharge port escape holes 22a (first hole). However, if arranged in this way, the discharge port escape holes 22a (first hole) are arranged. And the release valve relief hole 22b (second hole) approach, there is a risk that the reliability will be reduced as described above. Therefore, in the present embodiment, the thickness between the discharge port relief hole 22a (first hole) and the release valve relief hole 22b (second hole) in the pressing portion 22 is configured such that the above-described part does not overlap. Therefore, it is possible to secure the strength of the pressing portion 22 and to suppress the deformation of the release valve receiver 21b, thereby improving the reliability.

  In addition, since the size of the release hole 22a can be secured as described above, the working fluid can be easily removed, and the release valve device 20 can be normally operated. It is possible to increase the overall compression efficiency through the entire operating compression ratio region.

  Similarly, the distance between the release valve device space 20e in which the release valve device 20 is disposed and the discharge port 5d of the fixed scroll 5 is also close, and the release valve device space 20e and the discharge port are fixed in the fixed scroll 5. When a thickness is provided between 5d and 5d, this thickness is reduced, and there is a risk of lowering reliability due to strength problems. Therefore, in this embodiment, as shown in FIG. 9C, the release valve device space 20e and the discharge port 5d are connected so as not to have a thickness therebetween, thereby eliminating the strength problem and improving the reliability. It is intended.

  Next, a second embodiment of the scroll compressor of the present invention will be described. The present embodiment is the same as the first embodiment except for the point relating to the material of the pressing portion 22, and the description of the portions having the same functions is omitted.

  Conventionally, carbon steel has been used for the material of the release valve receiver 21b used in the release valve device 20, and a steel plate has been used for the holding part 22. However, in order to suppress deformation of the holding part 22, stainless steel with higher hardness is used. It is characterized by using. Thereby, the reliability of the release valve device 20 can be improved without changing the shape, and the same effect as in the first embodiment can be obtained.

  Next, a third embodiment of the scroll compressor of the present invention will be described with reference to FIG. Except for the dimension regulation of the release valve device 20, the second embodiment is the same as the first and second embodiments.

  FIG. 10 (a) shows a structure in which the release valve receiver 21b is located below the upper surface 5g of the fixed side plate portion 5b. FIG. 10B shows a structure in which the release valve receiver 21b is positioned above the upper surface 5g of the fixed side plate portion 5b. As shown in FIG. 10, in the fixed scroll 5, the release valve device space 20e is formed by an upper large diameter portion and a lower small diameter portion to restrict the release valve receiver 21b from approaching the release hole 20a more than necessary. In this way, it is configured in a two-stage shape. The release valve receiver 21b is formed of a cylindrical body, has an outer diameter slightly smaller than the inner diameter of the release valve device space 20e, and can move in the vertical direction at the upper large diameter portion in the release valve device space 20e. There is a gap.

  In FIG. 10A, the vertical thickness Dk of the upper large-diameter portion in the release valve device space 20e is slightly deeper than the vertical thickness Ds on the outer peripheral side of the release valve receiver 21b. At this time, if the distance h (= Dk−Ds) in which the release valve receiver 21b can move up and down is increased, the impact on the holding portion 22 is increased by the vertical movement of the release valve receiver 21b due to the expansion and contraction of the elastic material 21a. It turned out that the reliability of 21b and the holding | suppressing part 22 may be impaired.

  Therefore, in this embodiment, in order to suppress the vertical movement of the release valve receiver 21b as much as possible, the distance h (= Dk−Ds) in which the release valve receiver 21b can move up and down is set to 0.45 mm or less. It is possible to suppress the impact on the pressing portion 22 due to the vertical movement of the receiver 21b and improve the reliability.

  In FIG. 10B, the vertical thickness Dk of the upper large-diameter portion in the release valve device space 20e is made shallower than the vertical thickness Ds on the outer peripheral side of the release valve receiver 21b. Since the upper surface of the release valve receiver 21b is convex above the upper surface 5g of the fixed side plate portion 5b, in this case, the protruding portion is pressed by the pressing portion 22. In this case, the impact on the pressing portion 22 due to the vertical movement of the release valve receiver 21b as described in FIG. 10A can be suppressed.

  However, if the convex protrusion amount is too large, an excessive load is always applied to the pressing portion 22, which may cause deformation of the pressing portion 22. Therefore, in this embodiment, the amount of protrusion of the release valve receiver 21b, that is, h (= Ds−Dk) part) is set to 0.05 mm or less. As a result, an excessive load on the pressing portion 22 can be suppressed, and the reliability can be improved. Note that the vertical movement amount of the release valve receiver 21b can be changed only by changing the depth dimension in the release valve device space 20e to be processed into the fixed scroll 5, so that the work amount can be reduced. is there.

  Next, a fourth embodiment of the scroll compressor of the present invention will be described with reference to FIG. Except for the dimensional restriction of the release valve device 20, the third embodiment is the same as the first to third embodiments, and description of portions having the same functions is omitted.

FIG. 11 is a diagram for explaining the configuration of the scroll compressor according to the fourth embodiment.
About the reliability regarding the holding | suppressing part 22 and the release valve receptacle 21b, the influence of the contact area of the holding | suppressing part 22 and the release valve receptacle 21b is large. That is, in order to suppress the surface pressure applied to both end faces, a certain contact area or more must be ensured. For this reason, it is necessary to manage the amount of displacement between the holding portion 22 and the release valve receiver 21b at the time of assembly due to the processing dimensions of the parts. The holding portion 22 is fixed to the upper surface 5 g of the fixed side plate portion 5 b of the fixed scroll 5 with a bolt 23.

  Therefore, when assembling, the misalignment of the bolt hole provided in the upper surface 5g of the fixed side plate portion 5b of the fixed scroll 5, the clearance between the presser bolt through hole 22c and the bolt 23, and the presser bolt through hole 22c. Due to the misalignment, the misalignment of the release valve device space 20e, and the outer peripheral clearance between the release valve device space 20e and the release valve receiver 21b, the center position of the release valve relief hole 22b of the holding portion 22 and the release valve device space 20e are provided. Further, a deviation occurs in the center position of the release valve receiver 21b.

  In the present embodiment, when the pressing portion 22 is attached to the fixed scroll 5, the bolt hole core misalignment provided on the upper surface 5 g of the fixed side plate portion 5 b of the fixed scroll 5 + the gap between the presser portion bolt through hole 22 c and the bolt 23. + Core misalignment of presser bolt through hole 22c + Core misalignment of release valve device space + Even when there is a maximum misalignment due to the total outer clearance between release valve device space 20e and release valve receiver 21b in release valve device space 20e The contact width between the pressing portion 22 and the upper end surface of the release valve receiver 21b is ensured to be 0.3 mm or more.

  Next, a fifth embodiment of the scroll compressor of the present invention will be described with reference to FIG. The present embodiment is the same as the first to fourth embodiments except that the shape of the release valve receiver 21b of the release valve device 20 is different, and the description of the portions having the same functions is omitted.

FIG. 12 is a view for explaining the configuration of the release valve receiver 21b of the fifth embodiment.
In the present embodiment, a structure is shown in which the compression chamber 16 is overcompressed, the working fluid pushes up the release valve 20b, and the valve receiving surface where the release valve 20b and the release valve receiver 21b come into contact is enlarged.

  As shown in FIG. 12, the cylindrical release valve receiver 21b is formed with a central escape hole 21c for releasing the working fluid and a plurality of escape holes 21d around it. Although not shown, an elastic material 21a is attached to the lower convex portion of the release valve receiver 21b, the lower surface of the convex portion is the release valve receiver 21e, and the release valve 20b is opened when the release valve 20b is opened. It becomes a receiving surface. In this embodiment, the reliability of the release valve receiver 21b is improved by securing a flow path when the release valve 20b is opened and further enlarging the receiving surface.

  For this reason, the present embodiment includes a first release valve receiving portion 21e provided on the inner peripheral side of the release valve receiver 21b and a second release valve receiving portion 21h disposed on the outer peripheral side thereof. A plurality of relief holes 21d are formed on the outer peripheral side of the release valve receptacle 21b, and the second release valve receptacle 21h is disposed on substantially the same circle of the plurality of relief holes 21d and a plurality of relief holes 21d. It is formed in a place where is not formed.

  Thereby, the flow path of a working fluid is ensured enough, and the surface which receives the release valve 20b in the release valve receiver 21b can be expanded, and reliability can be improved. Further, since the release valve receiver 21b is formed in a column shape like the release valve device space 20e, the release valve receiver 21b can be restrained on the entire circumference of the inner wall of the release valve device space 20e. A behavior such as rotation within 20e can be suppressed.

  Next, a sixth embodiment of the scroll compressor of the present invention will be described with reference to FIG. The present embodiment is the same as the first to fourth embodiments except that the shape of the release valve receiver 21b of the release valve device 20 is different, and the description of the portions having the same functions is omitted.

FIGS. 13A and 13B are views for explaining the configuration of the release valve device 20 of the sixth embodiment.
In the present embodiment, in order to improve the reliability of the presser portion 22 and the release valve receiver 21b, a configuration in which the contact area between the presser portion 22 and the release valve receiver 21b is enlarged is shown. Expansion of the contact area between the holding part 22 and the upper end surface of the release valve receiver 21b is achieved by reducing the release valve relief hole 22b for releasing the over-compressed working fluid from the release valve device 20 provided in the holding part 22. it can. However, if the diameter of the release valve relief hole 22b provided in the holding portion 22 is too small, the original function of the release valve device 20 is impaired.

  FIG. 13A is a view for explaining the configuration of the release valve device 20 when the diameter of the release valve relief hole 22b is reduced. The shape of the release valve receiver 21b is the same as that shown in FIGS. At this time, the working fluid from the release hole 20a flows into the release valve chamber 20d as in the first embodiment. After that, it flows through a gap (a surrounding relief hole 21d) formed between the inner wall surface 20f of the release valve device space 20e and the recessed portion 21f of the release valve receiver 21b, and flows into the discharge pressure space 4f. 4 and 5, a release hole 21c in the center is formed in the release valve receiver 21b, and the working fluid in the release valve chamber 20d also flows into the release hole 21c in the center to apply pressure to the discharge pressure space 4f. Acts to escape.

  However, as shown in FIG. 13 (a), when the diameter of the release valve relief hole 22b is reduced, the working fluid can be allowed to flow from the central relief hole 21c to the discharge pressure space 4f. It cannot flow from the gap (the surrounding escape hole 21d). That is, the flow path by the release valve relief hole 22b of the holding part 22 may be extremely reduced or closed.

  FIG. 13B is a diagram showing the configuration of the release valve device 20 of this embodiment for solving this problem. A recessed channel 21g that is recessed toward the compression chamber 16 is formed in the upper part of the release valve receiver 21b, and the recessed channel 21g is formed so as to communicate with a gap (a peripheral escape hole 21d). As a result, the working fluid in the gap (the surrounding relief hole 21d) flows through the recessed passage 21g above the release valve receiver 21b, and flows out from the recessed passage 21g to the discharge pressure space 4f through the release valve relief hole 22b. is there.

  Thereby, the diameter of the release valve relief hole 22b for the working fluid of the pressing portion 22 is reduced, and the contact surface between the release valve receiver 21b and the pressing portion 22 is expanded, thereby improving the reliability and the flow path of the working fluid. Therefore, the effect of the release valve device 20 described in the first embodiment can be obtained.

  Next, a seventh embodiment of the scroll compressor of the present invention will be described with reference to FIGS. The present embodiment is the same as Embodiments 1 to 6 except that the shape around the discharge port 5d of the fixed scroll 5 is different, and the description of the portions having the same functions is omitted.

14 and 15 are views for explaining the configuration of the release valve device 20 of the seventh embodiment.
In the present embodiment, the fixed scroll 5 secures an interval of 2 to 3 mm or more between the discharge port 5d provided in the fixed scroll base plate portion 5b and the hole forming the release valve device space 20e closest to the discharge port 5d. Are arranged.

  An inner wall surface 20f and an inner wall surface of the release valve device space 20e of the release valve device 20 provided closest to the discharge port 5d with respect to the inner wall surface 5i forming the discharge port 5d in the fixed scroll 5. The thickness between 5i is 1 mm or less, and the strength may be insufficient.

  Further, when the discharge port 5d and the release valve device space 20e overlap with each other as in the structure shown in FIG. 14A, the discharge port 5d and the release valve device space have a shape that is a part of the wall surface removed. 20e is communicated. However, in this structure, when a part of the outer peripheral wall surface of the release valve receiver 21b is located at the counterbore part of the inner wall surface 20f of the release valve device space, the counterbore part cannot restrain the outer peripheral wall surface of the release valve receiver 21b. The release valve is easy to tilt on the side. As a result, there is a possibility that one contact of the release valve receiver 21b and the holding portion 22, and the release valve receiver 21b and the release valve 20b may occur.

  In this embodiment, the interval between the discharge port 5d and the release valve device space 20e is ensured without changing the position where the release valve device space 20e is provided. Here, in FIG. 14A, the discharge port 5d has an elliptical shape. On the other hand, in FIG. 14B, the outer peripheral portion of the discharge port 5d has a concave shape such that a portion facing the release valve device space 20e closest to the elliptical shape is recessed in a direction away from the release valve device space 20e. It is what I did.

  Fig.15 (a) has shown the change from the time of completion of compression of the opening cross-sectional area 5j of the compression chamber 16 and the discharge outlet 5d in the shape of Fig.14 (a). FIG. 15B shows a change from the completion of compression of the opening cross-sectional area 5j of the compression chamber 16 and the discharge port 5d in the shape of FIG. 14B. Compared with the discharge port 5d in FIG. 15A, the cross-sectional area of the discharge port 5d in FIG. 15B is slightly reduced, but as shown in FIG. 15B, the compression chamber 16 and the discharge port The opening cross section 5j with 5d (the shaded portion in FIG. 15) can be ensured to be equal to or greater than 15 (a), and discharge pressure loss can be suppressed.

  With this configuration, it is possible to improve the reliability of the release valve device 20 provided in the compression chamber 16 on the high pressure side near the discharge port 5d without degrading the performance.

  Next, an eighth embodiment of the scroll compressor of the present invention will be described with reference to FIG. The present embodiment is the same as the first to sixth embodiments except that the center position of the discharge space side discharge port 5k of the fixed scroll discharge port 5d and the center position of the compression chamber side discharge port 5l are eccentric. Description of portions having the same function is omitted.

FIG. 16 is a view for explaining the configuration of the release valve device 20 of the eighth embodiment.
In the present embodiment, the center position of the compression chamber side discharge port 5l, which is a discharge port of the working fluid from the compression chamber side, of the discharge port 5d provided in the fixed side plate portion 5b of the fixed scroll 5 and the discharge pressure space 4f The central position of the discharge space-side discharge port 5k, which is a working fluid escape port, is shifted by δ. Thus, the interval between the inner wall surface 20f of the release valve device space 20e and the inner peripheral wall surface 5i of the release valve device 20 closest to the discharge port 5d is secured without changing the shape and position of the compression chamber side discharge port 5l. It can be done.

  That is, the shape and center position of the compression chamber side discharge port 5l are not changed, and the shape does not interfere with the inner wall surface 20f that forms the upper stage portion of the release valve device space 20e, and is deep enough to ensure a certain interval. Processed. Further, the discharge space side discharge port 5k is provided with a center position shifted in a direction away from the release valve device space 20e of the release valve device 20 closest to the discharge port 5d. The discharge port 5d is formed by the communication between the compression chamber side discharge port 5l and the discharge space side discharge port 5k. In order to reduce pressure loss, the discharge space side discharge port 5k may have a different shape from the compression chamber side discharge port 5l.

  In addition, in the position where the compression chamber side discharge port 5l and the discharge space side discharge port 5k are connected, the portion A in FIG. If it becomes, it will reduce pressure loss, and it is still better.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 1 Scroll compressor 2 Compression mechanism part 3 Electric motor (3a: Rotor, 3b: Stator)
4 Sealed container (4a: cylindrical chamber, 4b: lid cap, 4c: bottom cap, 4d: suction pipe, 4e: discharge pipe, 4f: discharge pressure space)
5 fixed scroll (5a: fixed side wrap, 5b: fixed side plate portion, 5c: suction port, 5d: discharge port, 5e: top plate surface bolt hole, 5g: upper surface of fixed side plate portion, 5h: inside lower portion of fixed side plate portion Peripheral surface, 5i: inner peripheral side wall surface, 5j: discharge port opening cross section, 5k: discharge space side discharge port, 5l: compression chamber side discharge port)
6 orbiting scroll (6a: orbiting side wrap, 6b: orbiting side base plate, 6c: back pressure hole, 6d: orbiting bearing)
7 Frame 8 Main bearing 9 Crankshaft (9a: Main shaft, 9b: Eccentric pin part, 9c: Oil supply passage)
DESCRIPTION OF SYMBOLS 10 Oldham ring 11 Sub bearing 12 Housing 13 Lower frame 14 Pump part 15 Oil reservoir 16 Compression chamber 16a Outer side compression chamber 16b Inner side compression chamber 17 Back pressure chamber 20 Release valve device 20a Release hole 20b Release valve 20c Valve seat part 20d Release Valve chamber 20e Release valve device space 20f Inner wall surface 21a of release valve device space Elastic material 21b Release valve receptacle 21c Relief hole 21d Center relief hole 21e Release valve receptacle 21f Release valve receptacle recess 21g Slit (dent channel)
21h Release valve receiving part 22 Holding part 22a Discharge port relief hole 22b Release valve relief hole 22c Bolt through hole 23 Bolt

Claims (8)

A fixed scroll, and a turning scroll that meshes with the fixed scroll and forms a compression chamber by turning with respect to the fixed scroll;
A scroll compressor comprising: an electric motor that drives the orbiting scroll through a crankshaft;
A release valve device that allows the working fluid to flow from the compression chamber to the discharge pressure space by communicating the compression chamber and the discharge pressure space above the fixed scroll;
The release valve device includes: a release valve that opens and closes a flow path of a release hole that communicates with the compression chamber; a release valve receiver that receives the release valve when the release valve is opened; and the release valve receiver A pressing portion that presses the release valve receiver from above when releasing pressure, and the pressing portion includes a first hole corresponding to a discharge port of the fixed scroll that allows the working fluid compressed in the compression chamber to flow; A second hole corresponding to the release valve device is formed, and the first hole and the second hole are not communicated with each other,
Further, the scroll compressor is characterized in that the first hole and the discharge port are formed so as not to partially overlap by disposing the first hole at a position away from the second hole. The scroll compressor according to claim 1, wherein
A scroll compressor using stainless steel as a material for the release valve receptacle. The scroll compressor according to claim 1, wherein
The release valve device space in which the release valve device is arranged is composed of an upper large diameter portion and a lower small diameter portion,
The vertical thickness Dk of the upper large-diameter portion in the release valve device space is larger than the vertical thickness Ds on the outer peripheral side of the release valve receiver, and the difference h (= Dk−Ds) is 0. A scroll compressor characterized by being 45 mm or less. The scroll compressor according to claim 1, wherein
Even when the amount of deviation between the center position of the release valve relief hole for flowing the working fluid from the release valve device to the discharge pressure space in the holding portion and the center position of the release valve receiver becomes maximum, the release valve A scroll compressor characterized in that a contact area between the upper surface of the receiving portion and the pressing portion is a certain value or more. The scroll compressor according to claim 1, wherein
A first release valve receiving portion is formed on the convex portion of the lower portion of the release valve receiver, and a second release valve receiving portion is formed on the outer peripheral side of the first release valve receiving portion, and these first releases A scroll compressor, wherein the release valve is received when the release valve is opened by the valve receiver and the second release valve receiver. The scroll compressor according to claim 1, wherein
A recess is formed on the outer peripheral side of the release valve receptacle that is recessed toward the inner peripheral side in a symmetrical positional relationship, thereby forming a gap between the concave portion and the inner wall of the release valve device space.
A scroll compressor characterized in that a channel recessed toward the compression chamber is formed in an upper part of the release valve receptacle, and the channel is formed so as to communicate with the gap. A fixed scroll, and a turning scroll that meshes with the fixed scroll and forms a compression chamber by turning with respect to the fixed scroll;
A scroll compressor comprising: an electric motor that drives the orbiting scroll through a crankshaft;
A release valve device that allows the working fluid to flow from the compression chamber to the discharge pressure space by communicating the compression chamber and the discharge pressure space above the fixed scroll;
Between the inner wall surface of the release valve device space of the release valve device and the inner peripheral wall surface provided at a position closest to the discharge port with respect to the inner peripheral wall surface forming the discharge port in the fixed scroll A predetermined thickness is formed,
A scroll compressor characterized by having a concave shape in which a portion facing the release valve device space closest to the outer peripheral portion of the discharge port is recessed in a direction away from the release valve device space.   8. The scroll compressor according to claim 7, wherein an interval between a side wall forming a fixed scroll discharge port and a side wall forming a release valve device space of a release valve device provided at a position closest to the discharge port is set. The center position of the discharge space side discharge port for allowing the compressed working fluid to escape to the discharge space is arranged at an eccentric position with respect to the center position of the compression chamber side discharge port so as to leave Scroll compressor.

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