Scroll compressor

Abstract

To effectively suppress pressure pulsation of a fluid generated in a compression section.SOLUTION: There is provided a scroll compressor provided with a resonance part 90 for damping vibrations of a predetermined frequency that is generated by a refrigerant gas compressed by a fixed scroll and an orbital scroll. A central-side compression chamber 20A, which is in communication with a discharge port 21C formed in an end plate of the fixed scroll between a spiral wrap 21B of the fixed scroll and a spiral wrap 22B of the orbital scroll. A back-side compression chamber 20B adjacent to the central-side compression chamber 20A is formed between the back side of the spiral wrap 21B and the ventral side of the spiral wrap 22B. A ventral-side compression chamber 20C adjacent to the central-side compression chamber 20A is formed between the ventral side of the spiral wrap 21B and the back side of the spiral wrap 22B. The refrigerant gas is guided from the ventral-side compression chamber 20C into the resonance part 90 while the refrigerant gas compressed in the central-side compression chamber 20A flows into the ventral-side compression chamber 20C via the discharge port 21C.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to scroll compressors. [Background technology]

[0002] Conventionally, a scroll compressor having a fixed scroll and an orbiting scroll meshed with the fixed scroll is known (see, for example, Patent Document 1). Patent Document 1 discloses that refrigerant compressed by a compression mechanism is caused to flow into a muffler space from a discharge hole, and a diaphragm arranged in the muffler space is vibrated, thereby suppressing noise caused by pressure pulsation of the refrigerant. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-105635 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in Patent Document 1, the pressure pulsation of the refrigerant compressed by the compression mechanism until it is discharged from the discharge hole cannot be suppressed, so the noise generated by the pressure pulsation of the refrigerant in the compression mechanism cannot be suppressed. In addition, the device becomes large because a space is provided after the refrigerant compressed by the compression mechanism is discharged from the discharge hole. Furthermore, the device becomes complicated because a diaphragm is provided in the space.

[0005] The present disclosure has been made in consideration of the above circumstances, and has an object to provide a scroll compressor that is capable of effectively suppressing pressure pulsation of a fluid generated in a compression section, thereby reducing noise. [Means for solving the problem]

[0006] A scroll compressor according to one aspect of the present disclosure includes a compression section including a fixed scroll having a first spiral wall body standing on one side surface of a first end plate, and a rotating scroll having a second spiral wall body standing on one side surface of a second end plate and supported to be capable of orbital motion while being prevented from rotating on its axis by being meshed with the first wall body, and a resonance section that damps vibrations of a predetermined frequency generated by a fluid compressed by the fixed scroll and the orbiting scroll, and the first end plate of the fixed scroll is provided with a resonant portion that damps vibrations of a predetermined frequency generated by a fluid compressed by the fixed scroll and the orbiting scroll. a discharge port is formed through which the compressed fluid is discharged, a central compression chamber communicating with the discharge port is formed between a first inner end of the first wall body and a second inner end of the second wall body, a dorsal compression chamber adjacent to the central compression chamber is formed between the dorsal side of the first wall body and the ventral side of the second wall body, and a ventral compression chamber adjacent to the central compression chamber is formed between the ventral side of the first wall body and the dorsal side of the second wall body, and a fluid is guided to the resonance portion from the ventral compression chamber in a state in which the fluid compressed in the central compression chamber flows into the ventral compression chamber via the discharge port. Effect of the Invention

[0007] According to the present disclosure, it is possible to provide a scroll compressor capable of effectively suppressing pressure pulsation of a fluid generated in a compression section to reduce noise. [Brief description of the drawings]

[0008] [Figure 1] 1 is a vertical cross-sectional view showing a schematic configuration of a scroll compressor according to an embodiment of the present disclosure. [Diagram 2] 2 is a cross-sectional view taken along the line AA of the scroll compressor shown in FIG. [Diagram 3] 2 is a view of a compression section of the scroll compressor shown in FIG. 1 as viewed from the fixed scroll side. [Figure 4] 4 is a cross-sectional view taken along the arrow CC of the scroll compressor shown in FIG. 3. [Diagram 5] FIG. 2 is a cross-sectional view taken along the line AA of a first modified example of the scroll compressor. [Figure 6]FIG. 2 is a cross-sectional view taken along the line AA of a second modified example of the scroll compressor. [Figure 7] FIG. 2 is a cross-sectional view taken along the line AA of a third modified example of the scroll compressor. [Figure 8] FIG. 11 is a cross-sectional view taken along the line CC of a fourth modified example of the scroll compressor. [Figure 9] FIG. 11 is a cross-sectional view taken along the line CC of a fifth modified example of the scroll compressor. [Figure 10] FIG. 13 is a cross-sectional view taken along the line CC of a sixth modified example of the scroll compressor. [Figure 11] FIG. 13 is a cross-sectional view taken along the line CC of a seventh modified example of the scroll compressor. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A scroll compressor 100 according to an embodiment of the present disclosure will be described with reference to the drawings. The scroll compressor 100 of the present embodiment is used in, for example, a vehicle air conditioner.

[0010] Fig. 1 is a vertical cross-sectional view showing a schematic configuration of a scroll compressor 100 according to this embodiment. Fig. 2 is a cross-sectional view taken along the line AA of the scroll compressor 100 shown in Fig. 1. Fig. 3 is a view of the compression section 20 of the scroll compressor 100 shown in Fig. 1, seen from the fixed scroll 21 side. Fig. 1 is a cross-sectional view taken along the line BB of the scroll compressor 100 shown in Fig. 3.

[0011] As shown in FIG. 1, the scroll compressor 100 includes a housing 10, a compression section 20, a motor (drive section) 30, a rotating shaft 40, a bearing section 50, a bearing section 60, a balance weight 70, an inverter 80, and a resonance section 90.

[0012] The housing 10 forms an outer shell of the scroll compressor 100, and is made of an aluminum alloy. The housing 10 has a first housing 11, a second housing 12, and a third housing 13. The first housing 11, the second housing 12, and the third housing 13 are configured to be integrally fastened together by bolts 14. As shown in Fig. 1, the housing 10 is fixed to a cabinet (not shown) via legs 15 with an axis X1 disposed horizontally.

[0013] The housing 10 is formed in a cylindrical shape along an axis X1 which is the center of rotation of the orbiting scroll 22. The housing 10, including a first housing 11, a second housing 12, and a third housing 13, defines an internal space IS that accommodates the compression section 20 and the motor 30.

[0014] As shown in Fig. 1, the housing 10 is provided with a suction port P1 on the upper side in the vertical direction (gravity direction) VD. A refrigerant supplied from the outside is introduced into an internal space IS of the housing 10 from the suction port P1. The refrigerant introduced into the housing 10 is guided along the axis X1, passing through the motor 30, toward the compression section 20. The refrigerant drawn in from the suction port P1 is a mixed refrigerant (fluid) containing lubricating oil and a refrigerant gas.

[0015] The first housing 11 is formed in a substantially cylindrical shape along the axis X1, and has an internal space IS that houses the compression section 20 and the motor 30. The second housing 12 seals one end of the first housing 11 along the axis X1, and is provided with a discharge port (not shown) for the refrigerant gas compressed by the compression section 20. The third housing 13 seals the other end of the first housing 11 along the axis X1, and is provided with a space that houses the inverter 80 therein.

[0016] The housing 10 has a partition wall portion 16 that divides the internal space IS into a first space IS1 in which the motor 30 is disposed and a second space IS2 in which the bearing portion 50 and the compression portion 20 are disposed. The partition wall portion 16 has a bearing support portion 16a formed integrally with the first housing 11, and a thrust plate 16b.

[0017] The bearing support portion 16a is a member that divides the internal space IS into a first space IS1 and a second space IS2 and into which the bearing portion 50 is press-fitted. The thrust plate 16b is a plate-shaped member that is attached to the bearing support portion 16a and supports the orbiting scroll 22 by a sliding surface 16bA that comes into contact with an end face of the orbiting scroll 22 of the compression portion 20.

[0018] The compression unit 20 is a device disposed inside the first housing 11 and rotates about the axis X1 to compress the refrigerant gas. The compression unit 20 has a fixed scroll 21 fixed to the second housing 12 and an orbiting scroll 22 meshed with the fixed scroll 21. The compression unit 20 compresses the refrigerant gas by revolving the orbiting scroll 22 relative to the fixed scroll 21 by the driving force of the motor 30.

[0019] The fixed scroll 21 has a spiral wrap (first wall) 21B which is a wall provided on one side surface of an end plate (first end plate) 21A. A discharge port 21C through which the refrigerant gas compressed by the fixed scroll 21 and the orbiting scroll 22 is discharged is formed in the end plate 21A.

[0020] The orbiting scroll 22 has a spiral wrap (second wall) 22B which is a wall provided on one side of an end plate (second end plate) 22A. The orbiting scroll 22 is connected to an eccentric shaft 41 of a rotating shaft 40, and is supported so as to be capable of orbital movement via a rotation prevention mechanism (not shown) of a thrust plate 16b. The orbiting scroll 22 is meshed with a spiral wrap 21B of the fixed scroll 21 so as to be capable of orbital movement while being prevented from rotating.

[0021] As shown in FIG. 2, between the spiral wrap 21B of the fixed scroll 21 and the spiral wrap 22B of the orbiting scroll 22, a center side compression chamber 20A, a back side compression chamber 20B, and a front side compression chamber 20C are formed.

[0022] The center compression chamber 20A is formed between the first inner end 21Ba of the spiral wrap 21B and the second inner end 22Ba of the spiral wrap 22B. The center compression chamber 20A communicates with the discharge port 21C. The refrigerant gas compressed in the center compression chamber 20A is guided to the outside from the discharge port 21C through the discharge port P2.

[0023] The rear compression chamber 20B is a compression chamber formed between the rear side of the spiral wrap 21B and the ventral side of the spiral wrap 22B. The rear compression chamber 20B is disposed adjacent to the center compression chamber 20A. The ventral compression chamber 20C is a compression chamber formed between the ventral side of the spiral wrap 21B and the rear side of the spiral wrap 22B. The ventral compression chamber 20C is disposed adjacent to the center compression chamber 20A.

[0024] As shown in Fig. 3, the compression section 20 has a reed valve 23 attached to the fixed scroll 21 so as to close the discharge port 21C. The reed valve 23 opens when the pressure of the refrigerant gas in the central compression chamber 20A reaches or exceeds a predetermined pressure, and guides the refrigerant gas discharged from the discharge port 21C to the discharge space 21D shown in Fig. 1. The refrigerant gas guided to the discharge space 21D is then guided to the outside from a discharge port P2.

[0025] The motor 30 is a device that revolves the orbiting scroll 22 of the compression section 20 around the axis X1 relative to the fixed scroll 21. The motor 30 has a stator 31 and a rotor 32. The rotor 32 is connected to a rotary shaft 40.

[0026] The rotating shaft 40 is a shaft-shaped member that is rotated around the axis X1 by the motor 30. One end of the rotating shaft 40 is supported by a bearing 60 fixed to the third housing 13. The other end of the rotating shaft 40 is supported by a bearing 50 fixed to the bearing support 16a. An eccentric shaft 41 that is disposed eccentrically with respect to the axis X1 is provided at the end of the rotating shaft 40 on the compression section 20 side.

[0027] The eccentric shaft 41 is rotatably attached to a bearing portion fixed to the rear surface of the orbiting scroll 22 via a balance weight 70. The rotating shaft 40 is thus attached to the orbiting scroll 22 via the eccentric shaft 41.

[0028] The bearing portion 50 is a member that is press-fitted into the bearing support portion 16a and supports the rotating shaft 40 rotatably about the axis X1. The bearing portion 60 is a member that is press-fitted into the third housing 13 and supports the rotating shaft 40 rotatably about the axis X1.

[0029] The balance weight 70 is a member that is fixed to the eccentric shaft 41 of the rotary shaft 40 and rotates around the axis line X1. The balance weight 70 counteracts vibrations caused by the orbital motion of the orbiting scroll 22.

[0030] The inverter 80 is a device that generates a drive voltage for driving the motor 30 and controls the rotation speed of the motor 30 .

[0031] The resonance unit 90 is a device that attenuates vibrations (pulsations associated with pressure changes) of a predetermined frequency generated by the refrigerant gas compressed by the fixed scroll 21 and the orbiting scroll 22. As shown in Fig. 2, the refrigerant gas is guided to the resonance unit 90 from the abdominal side compression chamber 20C in a state in which the refrigerant gas compressed in the central side compression chamber 20A flows into the abdominal side compression chamber 20C via the discharge port 21C.

[0032] 2 shows a state in which the refrigerant gas compressed in the central compression chamber 20A is guided to the discharge port 21C. In the state shown in FIG. 2, the refrigerant gas compressed in the central compression chamber 20A is guided to the discharge space 21D through the discharge port 21C. In the state shown in FIG. 2, the discharge port 21C is connected to both the central compression chamber 20A and the abdominal compression chamber 20C. Therefore, a portion of the refrigerant gas compressed in the central compression chamber 20A is guided to the abdominal compression chamber 20C through the discharge port 21C.

[0033] 2, the pressure of the refrigerant gas in the central compression chamber 20A is higher than the pressure of the refrigerant gas in the abdominal compression chamber 20C. Therefore, the refrigerant gas flowing from the central compression chamber 20A to the abdominal compression chamber 20C generates pressure pulsation in the refrigerant gas in the abdominal compression chamber 20C. Therefore, in this embodiment, a resonance section 90 is provided to suppress the pressure pulsation of the refrigerant gas in the abdominal compression chamber 20C.

[0034] Fig. 4 is a cross-sectional view taken along the line CC of the scroll compressor 100 shown in Fig. 3. As shown in Fig. 4, the resonance portion 90 has a first introduction port 91 formed in the end plate 21A and communicating with the ventral compression chamber 20C, and a first space portion 92 formed in the end plate 21A and communicating with the first introduction port 91.

[0035] The first introduction port 91 is a through hole formed to extend along the axis X2 and having a first inner diameter D1 and a circular cross-sectional view. The first space 92 is a through hole formed to extend along the axis X2 and having a second inner diameter D2 and a circular cross-sectional view. The second inner diameter D2 is larger than the first inner diameter D1. The axis X2 is an axis extending parallel to the horizontal direction HD.

[0036] One end of the first space 92 communicates with the first introduction port 91, and the other end of the first space 92 opens toward the discharge space 21D. The opening of the first space 92 to the discharge space 21D is closed by a sealing valve 93. Therefore, the first space 92 is a space that is sealed by the sealing valve 93.

[0037] The resonance unit 90 functions as a Helmholtz resonator having a resonance frequency determined by the first inner diameter D1 and the length L1 along the axis X2 of the first introduction port 91, and the volume of the first space 92. The resonance unit 90 attenuates the vibration of the pressure pulsation generated in the refrigerant gas by previously setting the resonance frequency to match the frequency of the vibration of the pressure pulsation generated in the refrigerant gas at the position where the resonance unit 90 is disposed.

[0038] The sealing valve 93 has a valve plate 93a, which is a plate-shaped elastic member, and a retaining plate 93b that restricts the deformation of the valve plate 93a to a desired amount. The valve plate 93a opens when the pressure in the first space 92 of the resonance part 90 becomes higher than the pressure in the discharge space 21D. The first space 92 is formed by sealing a through hole formed in the end plate 21A with a thin valve plate (valve body) 93a.

[0039] The scroll compressor 100 of the present embodiment described above includes a single resonance unit 90 to which the refrigerant gas is guided from the abdominal compression chamber 20C in a state in which the refrigerant gas compressed in the central compression chamber 20A flows into the abdominal compression chamber 20C through the discharge port 21C, but other configurations are also possible. For example, the scroll compressor 100 may include a plurality of resonance units 90 to which the refrigerant gas is guided from the abdominal compression chamber 20C in a state in which the refrigerant gas compressed in the central compression chamber 20A flows into the abdominal compression chamber 20C through the discharge port 21C.

[0040] Fig. 5 is a cross-sectional view taken along the line AA of a first modified example of a scroll compressor 100 according to an embodiment of the present disclosure. As shown in Fig. 5, the scroll compressor 100 according to the first modified example includes five resonance sections 90 to which refrigerant gas is guided from the abdominal compression chamber 20C in a state in which the refrigerant gas compressed in the central compression chamber 20A flows into the abdominal compression chamber 20C via the discharge port 21C. Note that the number of resonance sections 90 included in the scroll compressor 100 according to the first modified example may be any number other than five.

[0041] The multiple resonating parts 90 shown in Fig. 5 may have the same resonant frequency, or may have a combination of multiple types of resonant frequencies. By making the multiple resonating parts 90 have the same resonant frequency, it is possible to reliably suppress vibrations of a desired frequency. Also, by making the multiple resonating parts 90 have different resonant frequencies, it is possible to suppress vibrations of multiple types of frequencies.

[0042] The scroll compressor 100 of the present embodiment described above includes a single resonance unit 90 through which the refrigerant gas is guided from the abdominal compression chamber 20C in a state in which the refrigerant gas compressed in the center compression chamber 20A flows into the abdominal compression chamber 20C through the discharge port 21C, but other configurations are also possible. For example, the scroll compressor 100 may include a resonance unit 90A through which the refrigerant gas is guided from the back compression chamber 20B in a state in which the refrigerant gas compressed in the center compression chamber 20A flows into the abdominal compression chamber 20C through the discharge port 21C.

[0043] Fig. 6 is a cross-sectional view taken along the line AA of a second modified example of the scroll compressor 100 according to an embodiment of the present disclosure. As shown in Fig. 6, the scroll compressor 100 according to the second modified example includes a resonance section (first resonance section) 90 to which the refrigerant gas is guided from the abdominal compression chamber 20C and a resonance section (second resonance section) 90A to which the refrigerant gas is guided from the abdominal compression chamber 20B in a state in which the refrigerant gas compressed in the center compression chamber 20A flows into the abdominal compression chamber 20C through the discharge port 21C. The cross-sectional view taken along the line DD of the compression section 20 shown in Fig. 6 is similar to the cross-sectional view shown in Fig. 4.

[0044] According to the scroll compressor 100 of the second modification, in a state where the refrigerant gas compressed in the center side compression chamber 20A flows into the ventral side compression chamber 20C through the discharge port 21C, the refrigerant gas is guided from the ventral side compression chamber 20C to the resonance section 90, and the refrigerant gas is guided from the back side compression chamber 20B to the resonance section 90A. Therefore, vibrations of a predetermined frequency generated by the refrigerant gas in the ventral side compression chamber 20C and the back side compression chamber 20B are damped by the resonance section 90 and the resonance section 90A. Therefore, the pressure pulsation of the refrigerant gas generated in the compression section 20 can be effectively suppressed to reduce noise.

[0045] The resonance portion 90 of the scroll compressor 100 of the present embodiment described above is configured to function as a Helmholtz resonator by forming the first introduction port 91 and the first space 92 in the end plate 21A and sealing the first space 92 with the sealing valve 93, but other configurations are also possible. For example, the scroll compressor 100 may have the first space 92 formed by sealing the recess 12a formed in the second housing 12 in the region where the first introduction port 91 of the end plate 21A is formed.

[0046] The scroll compressor 100 of the present embodiment described above includes a single resonance portion 90 to which the refrigerant gas is guided from the abdominal compression chamber 20C in a state in which the refrigerant gas compressed in the center compression chamber 20A flows into the abdominal compression chamber 20C through the discharge port 21C, but other configurations are also possible. For example, the scroll compressor 100 may include a plurality of resonance portions 90 to which the refrigerant gas is guided from the abdominal compression chamber 20C and a plurality of resonance portions 90A to which the refrigerant gas is guided from the back compression chamber 20B in a state in which the refrigerant gas compressed in the center compression chamber 20A flows into the abdominal compression chamber 20C through the discharge port 21C.

[0047] Fig. 7 is a cross-sectional view taken along the line AA of a third modified example of the scroll compressor 100 according to an embodiment of the present disclosure. As shown in Fig. 7, the scroll compressor 100 according to the third modified example includes a plurality of resonance parts (first resonance parts) 90 to which the refrigerant gas is guided from the abdominal compression chamber 20C and a plurality of resonance parts (second resonance parts) 90A to which the refrigerant gas is guided from the abdominal compression chamber 20B in a state in which the refrigerant gas compressed in the center compression chamber 20A flows into the abdominal compression chamber 20C via the discharge port 21C.

[0048] According to the scroll compressor 100 of the third modification, in a state where the refrigerant gas compressed in the center side compression chamber 20A flows into the ventral side compression chamber 20C through the discharge port 21C, the refrigerant gas is guided from the ventral side compression chamber 20C to the resonance section 90, and the refrigerant gas is guided from the back side compression chamber 20B to the resonance section 90A. Therefore, vibrations of a predetermined frequency generated by the refrigerant gas in the ventral side compression chamber 20C and the back side compression chamber 20B are damped by the resonance section 90 and the resonance section 90A. Therefore, the pressure pulsation of the refrigerant gas generated in the compression section 20 can be effectively suppressed to reduce noise.

[0049] The multiple resonating parts 90 shown in FIG. 7 may have the same resonant frequency or may be a combination of multiple types of resonant frequencies. The multiple resonating parts 90A may have the same resonant frequency or may be a combination of multiple types of resonant frequencies. By making the multiple resonating parts 90, 90A have the same resonant frequency, it is possible to reliably suppress vibrations of a desired frequency. Furthermore, by making the multiple resonating parts 90, 90A have different resonant frequencies, it is possible to suppress vibrations of multiple types of frequencies.

[0050] Fig. 8 is a cross-sectional view taken along the line CC of a fourth modified example of a scroll compressor 100 according to an embodiment of the present disclosure. As shown in Fig. 8, a recess 12a extending along an axis X2 parallel to the axis X1 and having a bottom is formed in the second housing 12 of the scroll compressor 100 according to the fourth modified example. The first space 92 is formed by sealing the recess 12a formed in the second housing 12 in a region where the first introduction port 91 of the end plate 21A is formed.

[0051] According to the fourth modified scroll compressor 100, a first space 92 is formed by sealing the recess 12a formed in the second housing 12 in the area where the first inlet port 91 of the end plate 21A is formed, and the first inlet port 91 and the first space 92 can function as a Helmholtz resonator.

[0052] The resonance section 90 of the scroll compressor 100 of the present embodiment described above is configured to function as a Helmholtz resonator by forming the first introduction port 91 and the first space 92 in the end plate 21A and sealing the first space 92 with the sealing valve 93, but other configurations are also possible. For example, the scroll compressor 100 may be configured such that the first introduction port 91 and the opening hole 94 are formed in the end plate 21A, and the first space 92 is formed by attaching a cylindrical body 95 to the opening hole 94.

[0053] Fig. 9 is a cross-sectional view taken along the line CC of a fifth modified example of a scroll compressor 100 according to an embodiment of the present disclosure. As shown in Fig. 9, an open hole 94 is formed in an end plate 21A of the scroll compressor 100 according to the fourth modified example, the open hole 94 being formed to extend along the axis X2. A female thread 94a is formed on the inner peripheral surface of the open hole 94.

[0054] The cylindrical body 95 is formed in a cylindrical shape so as to extend along the axis X2, and has an external thread 95a formed on its outer circumferential surface. By rotating the cylindrical body 95 about the axis X2 in a state in which the external thread 95a of the cylindrical body 95 is engaged with the internal thread 94a of the opening hole 94, the cylindrical body 95 is attached to the opening hole 94, and a sealed first space portion 92 is formed.

[0055] According to the scroll compressor 100 of the fifth modified example, by selecting various shapes for the cylindrical body 95, it is possible to form a first space portion 92 of any volume and adjust the resonant frequency of the resonant portion 90 to any frequency.

[0056] The resonance portion 90 of the scroll compressor 100 of the present embodiment described above forms the first introduction port 91 and the first space 92 in the end plate 21A along the axis X2 extending parallel to the horizontal direction HD, but may be in other forms. For example, the resonance portion 90 may form the first introduction port 91 and the first space 92 in the end plate 21A along the axis X3 inclined downward from the horizontal direction HD at an inclination angle θ.

[0057] Fig. 10 is a cross-sectional view taken along the line CC of a sixth modified example of a scroll compressor 100 according to an embodiment of the present disclosure. As shown in Fig. 10, a resonance section 90 of the scroll compressor 100 according to the sixth modified example has a first introduction port 91 and a first space 92 formed in an end plate 21A along an axis (inclined axis) X3 that is inclined downward at an inclination angle θ from the first space 92 toward the first introduction port 91 with respect to the horizontal direction HD.

[0058] According to the resonance section 90 of the scroll compressor 100 of the sixth modified example, the first inlet port 91 and the first space section 92 are inclined downward in the vertical direction VD, so that the lubricating oil flowing into the first inlet port 91 and the first space section 92 together with the refrigerant gas can be returned by its own weight downward in the vertical direction VD to the ventral compression chamber 20C.

[0059] The scroll compressor 100 of the sixth modified example shown in Fig. 10 may have another aspect. For example, the position in the vertical direction VD of the end of the first introduction port 91 on the first spatial portion 92 side and the end of the first spatial portion 92 on the first introduction port 91 side may be aligned. Fig. 11 is a cross-sectional view taken along the arrow CC showing a seventh modified example of the scroll compressor 100 according to an embodiment of the present disclosure.

[0060] 11, in the resonance section 90 of the scroll compressor 100 of the seventh modification, the end of the first introduction port 91 on the first spatial portion 92 side and the end of the first spatial portion 92 on the first introduction port 91 side are aligned in the vertical direction VD. Therefore, when the lubricating oil introduced to the first spatial portion 92 reaches the end of the first introduction port 91 side by its own weight, all of the lubricating oil is introduced to the end of the first introduction port 91 on the first spatial portion 92 side. Therefore, according to the resonance section 90 of the scroll compressor 100 of the seventh modification, the entire amount of the lubricating oil contained in the mixed refrigerant introduced to the first introduction port 91 and the first spatial portion 92 can be returned to the abdominal compression chamber 20C downward in the vertical direction VD by its own weight.

[0061] The actions and effects achieved by the scroll compressor 100 of the present embodiment described above will be described. According to the scroll compressor 100 of this embodiment, the orbiting scroll 22 revolves around the fixed scroll 21, so that the refrigerant gas introduced from the outer periphery of the compression section 20 is gradually compressed and guided to the back side compression chamber 20B and the ventral side compression chamber 20C, and is further compressed in the center side compression chamber 20A and discharged from the discharge port 21C. When the fluid compressed in the center side compression chamber 20A is discharged from the discharge port 21C, a part of the refrigerant gas compressed in the center side compression chamber 20A is guided to the ventral side compression chamber 20C via the discharge port 21C.

[0062] When the refrigerant gas compressed in the central compression chamber 20A flows into the abdominal compression chamber 20C through the discharge port 21C, the pressure of the refrigerant gas in the central compression chamber 20A is higher than the pressure of the fluid in the abdominal compression chamber 20C. Therefore, the refrigerant gas flowing from the central compression chamber 20A to the abdominal compression chamber 20C generates pressure pulsation in the refrigerant gas in the abdominal compression chamber 20C.

[0063] According to the scroll compressor 100 of the present embodiment, while the refrigerant gas compressed in the center side compression chamber 20A flows into the abdominal side compression chamber 20C through the discharge port 21C, the refrigerant gas is guided from the abdominal side compression chamber 20C to the resonance section 90. Therefore, vibrations of a predetermined frequency generated by the refrigerant gas in the abdominal side compression chamber 20C are damped by the resonance section 90. Therefore, the pressure pulsation of the refrigerant gas generated in the compression section 20 can be effectively suppressed to reduce noise.

[0064] According to the scroll compressor 100 of this embodiment, by appropriately setting the length L1 and cross-sectional area of ​​the first inlet port 91 and the volume of the first spatial portion 92, the resonance portion 90 can function as a Helmholtz resonator that suppresses vibrations of a predetermined frequency, and vibrations of a predetermined frequency generated by the refrigerant gas compressed by the fixed scroll 21 and the orbiting scroll 22 can be suppressed.

[0065] According to the scroll compressor 100 of this embodiment, the first space 92 is sealed with the thin valve plate 93a, so that the first introduction port 91 and the first space 92 can function as a Helmholtz resonator. Furthermore, when an excessive amount of lubricating oil accumulates in the first introduction port 91 and the first space 92, the thin valve plate 93a can be opened to discharge the lubricating oil from the first introduction port 91 and the first space 92.

[0066] The scroll compressor according to the present embodiment described above can be understood, for example, as follows. A scroll compressor (100) according to a first aspect of the present disclosure includes a compression section (20) including a fixed scroll (21) having a spiral first wall body (21B) erected on one side surface of a first end plate (21A) and an orbiting scroll (22) having a spiral second wall body (22B) erected on one side surface of a second end plate (22A) and supported so as to be capable of orbital motion while being prevented from rotating on its axis by meshing with the first wall body, and a resonance section (90) that damps vibrations of a predetermined frequency generated by a fluid compressed by the fixed scroll and the orbiting scroll ... A discharge port (21C) is formed through which fluid compressed by a crawl is discharged, a central compression chamber (20A) communicating with the discharge port is formed between a first inner end of the first wall body and a second inner end of the second wall body, a back compression chamber (20B) adjacent to the central compression chamber is formed between the back side of the first wall body and the ventral side of the second wall body, and a ventral compression chamber (20C) adjacent to the central compression chamber is formed between the ventral side of the first wall body and the back side of the second wall body, and fluid is guided from the ventral compression chamber to the resonance section in a state in which the fluid compressed in the central compression chamber flows into the ventral compression chamber via the discharge port.

[0067] According to the scroll compressor according to the first aspect of the present disclosure, the orbiting scroll revolves around the fixed scroll, so that the fluid introduced from the outer periphery side of the compression section is gradually compressed and guided to the dorsal compression chamber and the ventral compression chamber, and is further compressed in the central compression chamber and discharged from the discharge port. When the fluid compressed in the central compression chamber is discharged from the discharge port, a portion of the fluid compressed in the central compression chamber is guided to the ventral compression chamber via the discharge port.

[0068] When the fluid compressed in the central compression chamber flows into the ventral compression chamber through the discharge port, the pressure of the fluid in the central compression chamber is higher than the pressure of the fluid in the ventral compression chamber, so that the fluid flowing from the central compression chamber to the ventral compression chamber generates pressure pulsations in the fluid in the ventral compression chamber.

[0069] According to the scroll compressor according to the first aspect of the present disclosure, the fluid compressed in the central compression chamber flows into the abdominal compression chamber through the discharge port, and the fluid is guided from the abdominal compression chamber to the resonance section. Therefore, the vibration of a predetermined frequency generated by the fluid in the abdominal compression chamber is damped by the resonance section. Therefore, the pressure pulsation of the fluid generated in the compression section can be effectively suppressed to reduce noise.

[0070] The scroll compressor according to the second aspect of the present disclosure is the first aspect, and further includes the following configuration: Namely, the scroll compressor includes a plurality of the resonance parts, and a first resonance part receives a fluid from the ventral compression chamber in a state in which the fluid compressed in the central compression chamber flows into the ventral compression chamber via the discharge port, and a second resonance part receives a fluid from the ventral compression chamber in a state in which the fluid compressed in the central compression chamber flows into the ventral compression chamber via the discharge port.

[0071] According to the scroll compressor of the second aspect of the present disclosure, in a state where the fluid compressed in the center compression chamber flows into the ventral compression chamber through the discharge port, the fluid is guided from the ventral compression chamber to the first resonance section, and the fluid is guided from the back compression chamber to the second resonance section. Therefore, vibrations of a predetermined frequency generated by the fluid in the ventral compression chamber and the back compression chamber are damped by the resonance section. Therefore, pressure pulsation of the fluid generated in the compression section can be effectively suppressed to reduce noise.

[0072] The scroll compressor according to a third aspect of the present disclosure is the first or second aspect, further including the following configuration: That is, the resonance portion has a first introduction port (91) formed in the first end plate, communicating with the ventral-side compression chamber, and having a first inner diameter (D1), and a sealed first space portion (92) formed in the first end plate, communicating with the first introduction port, and having a second inner diameter larger than the first inner diameter.

[0073] According to the scroll compressor of the third aspect of the present disclosure, by appropriately setting the length and cross-sectional area of ​​the first inlet port and the volume of the first spatial portion, the resonating portion can function as a Helmholtz resonator that suppresses vibrations of a predetermined frequency, and vibrations of a predetermined frequency generated by the fluid compressed by the fixed scroll and the orbiting scroll can be suppressed.

[0074] A scroll compressor according to a fourth aspect of the present disclosure is the third aspect, further comprising the following configuration: the fluid includes a refrigerant compressed by the fixed scroll and the orbiting scroll, and a lubricant, and the first space portion is formed by sealing a through hole having one end communicating with the first introduction port and the other end open, with a thin plate-shaped valve body (93a).

[0075] According to the scroll compressor according to the fourth aspect of the present disclosure, the first space is sealed with a thin plate-like valve body, so that the first inlet port and the first space function as a Helmholtz resonator. In addition, when the lubricating oil is excessively accumulated in the first inlet port and the first space, the thin plate-like valve body is opened to discharge the lubricating oil from the first inlet port and the first space.

[0076] A scroll compressor according to a fifth aspect of the present disclosure is the third aspect, further comprising the following configuration: A housing (10) is provided that is cylindrically formed along an axis (X1) about which the orbiting scroll orbits and has an internal space that accommodates the compression section, a recess (12a) that extends parallel to the axis and has a bottom is formed in the housing, and the first space section is formed by sealing the recess formed in the housing in a region where the first introduction port of the first end plate is formed.

[0077] According to the scroll compressor according to the fifth aspect of the present disclosure, a first spatial portion is formed by sealing a recess formed in the housing in the area where the first inlet port of the first end plate is formed, and the first inlet port and the first spatial portion can function as a Helmholtz resonator.

[0078] A scroll compressor according to a sixth aspect of the present disclosure is the third aspect, further comprising the following configuration: the first introduction port and the first space are formed along an inclined axis that is inclined downward from the first space toward the first introduction port with respect to the horizontal direction.

[0079] According to the scroll compressor of the sixth aspect of the present disclosure, the first inlet port and the first spatial portion are inclined downward in the vertical direction, so that the lubricating oil that flows into the first inlet port and the first spatial portion together with the refrigerant gas can be returned vertically downward to the compression chamber by its own weight.

[0080] A scroll compressor according to a seventh aspect of the present disclosure is the sixth aspect, further including the following configuration: That is, the vertical position of the end of the first introduction port on the first spatial portion side and the vertical position of the end of the first spatial portion on the first introduction port side are aligned.

[0081] According to the scroll compressor of the seventh aspect of the present disclosure, the end of the first inlet port on the first spatial portion side and the end of the first spatial portion on the first inlet port side are aligned in the vertical direction. Therefore, when the lubricating oil introduced into the first spatial portion reaches the end of the first inlet port side by its own weight, all of the lubricating oil is introduced into the end of the first inlet port on the first spatial portion side. Therefore, all of the lubricating oil contained in the mixed refrigerant introduced into the first inlet port and the first spatial portion can be returned to the compression chamber vertically downward by its own weight. [Explanation of symbols]

[0082] 10. Housing 11 First Housing 12 Second Housing 12a recess 13 Third Housing 14 Volts 15 Legs 16 Bulkhead 16a Bearing support part 20 Compression section 20A Center compression chamber 20B Back compression chamber 20C Ventral compression chamber 21 Fixed Scroll 21A End plate (1st end plate) 21B Spiral wrap (first wall) 21C Discharge port 21D discharge space 22 Swivel Scroll 22B Spiral wrap (second wall) 23 Reed valve 30 Motor 40 Rotational Axis 41 Eccentric shaft 90,90A resonance part 91 First Introduction Port 92 First space part 93 Sealing valve 94 Opening hole 95 Cylindrical body 100 Scroll compressor D1 First inner diameter D2 Second inner diameter HD Horizontal direction IS Internal space IS1 First space IS2 Second space P1 Suction port P2 Discharge port VD Vertical direction X1, X2, X3 Axes θ Inclination angle

Claims

1. a compression section including a fixed scroll having a first spiral wall body standing on one side surface of a first end plate, and a second spiral wall body standing on one side surface of a second end plate, and an orbiting scroll having a second spiral wall body standing on one side surface of a second end plate, and being supported so as to be capable of revolving while being prevented from rotating on its own axis by being engaged with the first wall body; a resonance portion that attenuates vibrations of a predetermined frequency generated by a fluid compressed by the fixed scroll and the orbiting scroll, a discharge port through which fluid compressed by the fixed scroll and the orbiting scroll is discharged is formed in the first end plate of the fixed scroll, a center-side compression chamber communicating with the discharge port is formed between a first inner end of the first wall body and a second inner end of the second wall body, A rear compression chamber adjacent to the central compression chamber is formed between the rear side of the first wall body and the ventral side of the second wall body, a ventral compression chamber adjacent to the central compression chamber is formed between the ventral side of the first wall body and the dorsal side of the second wall body, The scroll compressor has a fluid guided from the abdominal side compression chamber to the resonance portion in a state in which the fluid compressed in the central side compression chamber flows into the abdominal side compression chamber via the discharge port.

2. A plurality of the resonating portions are provided, The first resonance portion receives fluid from the ventral compression chamber in a state in which the fluid compressed in the central compression chamber flows into the ventral compression chamber via the discharge port, 2. The scroll compressor according to claim 1, wherein the second resonance portion receives fluid from the back-side compression chamber while the fluid compressed in the center-side compression chamber flows into the ventral-side compression chamber via the discharge port.

3. The resonance portion is a first inlet port formed in the first end plate, in communication with the ventral compression chamber, the first inlet port having a first inner diameter; 3. The scroll compressor according to claim 1, further comprising: a first space portion formed in the first end plate, communicating with the first introduction port, and having a second inner diameter larger than the first inner diameter.

4. The fluid includes a refrigerant compressed by the fixed scroll and the orbiting scroll, and a lubricant.

4. The scroll compressor according to claim 3, wherein the first space is formed by sealing a through hole having one end communicating with the first introduction port and the other end open with a thin plate-like valve body.

5. a housing formed in a cylindrical shape along an axis about which the orbiting scroll orbits and having an internal space for accommodating the compression section; The housing has a recess formed therein, the recess extending parallel to the axis and having a bottom, 4. The scroll compressor according to claim 3, wherein the first space is formed by sealing the recess formed in the housing at a region of the first end plate where the first introduction port is formed.

6. 4. The scroll compressor according to claim 3, wherein the first introduction port and the first space are formed along an inclined axis that is inclined downward from the first space toward the first introduction port with respect to the horizontal direction.

7. 7. The scroll compressor according to claim 6, wherein an end of the first introduction port on the side of the first space and an end of the first space on the side of the first introduction port are aligned in a vertical direction.

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