JP2009047018A - Compressor - Google Patents

Abstract

A compressor capable of forming a muffler chamber without performing complicated processing and capable of reducing operating noise is provided.
A compressor includes a cylinder main body that forms a cylinder chamber, an end surface member that is attached to an end surface of the cylinder main body and that has a discharge hole that communicates with the cylinder chamber, and the end surface member. A discharge valve 31 that opens and closes the discharge hole 23a, a valve pressing member 32 disposed so as to sandwich the discharge valve 31 between the end face member 23, the discharge valve 31, and the valve pressing member 32 And a fastening member 33 for connecting to the end face member 23. The end surface member 23 includes a fastening hole 23 b into which the fastening member 33 is inserted, and a sound deadening chamber 50 communicating with the cylinder chamber 22. The silencing chamber 50 is formed as a part of the fastening hole 23b.
[Selection] Figure 4

Description

  The present invention relates to a compressor such as a rotary compressor used in, for example, an air conditioner.

  As a conventional compressor, for example, the one shown in FIG. 1 of Patent Document 1 is a muffler in which a Helmholtz resonance chamber communicating with a compression chamber is formed in a part of a main bearing of a compressor portion housed in a casing. It has a structure. An electromagnet is disposed on the outer periphery of the resonance chamber. The electromagnet is excited according to the operating state of the compressor, and the internal valve body is moved to open and close the communication path between the compression chamber and the resonance chamber. As a result, it is possible to communicate with the resonance chamber only when silent operation is necessary, and to silence the compressor noise. Further, the compressor described in FIG. 3 of Patent Document 1 is provided with a Helmholtz type resonance chamber by processing a part of a cylinder, and is configured so that the capacity of the resonance chamber can be changed by movement of a valve body. ing.

  Further, in the compressor described in FIG. 9 in Patent Document 2, the bolt is inserted into the through hole of the end surface member and screwed into the screw hole of the valve pressing member, so that the discharge valve is connected to the end surface member and the valve pressing member. It is what is pinched by. The end face of the cylinder body has a recess for accommodating the head of the bolt, and a connecting passage for connecting the recess and the cylinder chamber. The recess forms a Helmholtz resonance chamber. Thereby, the wavelength of the pulsation sound of the refrigerant gas generated when compressed in the cylinder chamber interferes with the interference wave from the resonance chamber and is greatly attenuated. Therefore, the pulsation noise is reduced and noise can be reduced.

Japanese Utility Model Publication No. 4-100092 JP 2006-189035 A (FIG. 9)

  However, in the compressor disclosed in Patent Document 1, it is necessary to process a main bearing or a cylinder in order to form a resonance chamber. Moreover, it is a structure which requires the components for forming a resonance chamber separately. This complicates the processing of the main bearing or the cylinder and increases the number of parts, which may increase the manufacturing cost of the compressor.

  Further, in the compressor disclosed in the above-mentioned Patent Document 2, although the concave portion that accommodates the head of the bolt can be used as a Helmholtz type resonance chamber, it is necessary to add both the resonance chamber and the connecting passage to the cylinder body. In this respect, the manufacturing process of the cylinder is complicated, which causes a problem.

  Accordingly, the present invention has been made to solve the above-described problems, and provides a compressor capable of forming a muffler chamber without performing complicated processing and capable of reducing operating noise. For the purpose.

  A compressor according to a first aspect of the present invention includes a cylinder body that forms a cylinder chamber, an end surface member that is attached to an end surface of the cylinder body and that communicates with the cylinder chamber, and opens and closes the discharge hole of the end surface member A valve pressing member disposed so as to sandwich the discharge valve between the discharge valve and the end surface member, and a fastening member for connecting the discharge valve and the valve pressing member to the end surface member The end surface member includes a fastening hole into which the fastening member is inserted, and a silencer chamber communicating with the cylinder chamber, and the silencer chamber is formed as a part of the fastening hole. It is characterized by being.

  In this compressor, since a part of the fastening hole functions as a noise reduction chamber, it is not necessary to process the noise reduction chamber in a separate process. Moreover, since the fastening hole including the silencing chamber is formed in the end face member, it is not necessary to perform processing for forming the silencing chamber in the cylinder body. Thereby, it is possible to form a muffler chamber without performing complicated processing, and it is possible to reduce driving noise.

  A compressor according to a second aspect is characterized in that, in the compressor according to the first aspect, the silencer chamber communicates with the cylinder chamber via a communication hole having a smaller diameter than the diameter of the fastening hole. To do.

  In this compressor, a silencing structure using a Helmholtz resonator can be configured by the silencing chamber and the communication hole. Thereby, the operation sound in a desired frequency region can be reduced by appropriately designing the volume of the muffler chamber, the length and diameter of the communication hole, and the like.

  A compressor according to a third aspect is characterized in that, in the compressor according to the second aspect, the fastening hole and the communication hole are formed concentrically.

  In this compressor, since the fastening hole and the communication hole are formed concentrically, it is easy to process the fastening hole and the communication hole in the end face member. For example, after passing the communication hole through the end face member, a fastening hole having a diameter larger than that of the communication hole can be formed using the communication hole as a pilot hole.

  A compressor according to a fourth aspect of the present invention is the compressor according to the first to third aspects of the present invention, wherein the fastening member is constituted by a bolt, and the bolt is attached to the female screw threaded into at least a part of the fastening hole. The shaft portion of the bolt is inserted into the head portion of the bolt and the end surface member so as to sandwich the discharge valve and the valve pressing member, and the shaft portion of the bolt in the fastening hole is connected. The sound deadening chamber is provided on the distal end side.

  In this compressor, the fastening member is constituted by a bolt, and the valve pressing member and the discharge valve can be connected to the end face member by screwing the bolt. As a result, assembly is facilitated. For example, as compared with the case of fixing with rivets, the bolts can be retightened, so that the alignment of the discharge valve and the discharge hole can be easily corrected. Also, the seal check can be easily aligned. In addition, since the space on the tip end side of the shaft portion of the bolt in the fastening hole is used as the sound deadening chamber, the volume of the sound deadening chamber can be easily adjusted by changing the length of the shaft portion of the bolt. .

  A compressor of a fifth invention is the compressor according to the first to fourth inventions, wherein the silencer chamber overlaps at least partly with the cylinder chamber when viewed from the axial direction of the drive shaft of the compression mechanism. It is formed in the position.

  In this compressor, the path for communicating the sound deadening chamber and the cylinder chamber can be formed by processing in a direction parallel to the axial direction of the drive shaft of the compression mechanism. As a result, it is easy to form a silencer chamber that communicates with the cylinder chamber.

  A compressor according to a sixth aspect of the present invention is the compressor according to the first to fifth aspects of the present invention, wherein the roller disposed in the cylinder chamber moves along the inner wall surface of the cylinder chamber, and the gas in the cylinder chamber And a silencing chamber communicating with the cylinder chamber in the vicinity of the inner wall surface of the cylinder chamber.

  In this compressor, the time during which the communication path between the noise reduction chamber and the cylinder chamber is closed due to the revolution of the roller during operation can be shortened. As a result, it is possible to extend the time for which the noise reduction effect of the driving sound is exhibited, and to improve the noise reduction effect.

  A compressor according to a seventh invention is a compressor according to any one of the first to sixth inventions, and is used by being incorporated in an air conditioner and compressing carbon dioxide used as a refrigerant of the air conditioner. It is characterized by using.

  When using carbon dioxide as a refrigerant in an air conditioner, the compression ratio is higher than when using chlorofluorocarbon or the like as a refrigerant. When this compressor is used for the compression of carbon dioxide, the high compression ratio is effective because the silencing effect of the silencing chamber is increased even when the volume of the silencing chamber is small.

  The compressor according to an eighth aspect of the present invention is the compressor according to the first to seventh aspects of the present invention, wherein the cylinder in the end surface member is connected after the end surface member, the discharge valve, and the valve pressing member are connected by the fastening member. The surface processing which faced the end surface of a main body was performed, It is characterized by the above-mentioned.

  In this compressor, even when distortion occurs in the out-of-plane direction on the surface of the end surface member facing the end surface of the cylinder body when connected by the fastening member, the surface is flattened by performing planar processing after connection. It becomes possible to make it a high plane. As a result, the adhesion with the end face of the cylinder body is improved, and gas leakage between the cylinder chamber and the outside of the cylinder can be suppressed. Further, the gap in the height direction between the cylinder and the roller can be set uniformly.

  As described above, according to the present invention, the following effects can be obtained.

  In 1st invention, since a part of fastening hole acts as a noise reduction chamber, it becomes unnecessary to process a noise reduction chamber by another process. Further, it is not necessary to perform a process for forming a sound deadening chamber in the cylinder body. Thereby, it is possible to form a muffler chamber without performing complicated processing, and it is possible to reduce driving noise.

  In the second invention, a Helmholtz type sound absorbing structure can be constituted by the sound deadening chamber and the communication hole.

  In 3rd invention, the process of the hole for fastening to an end surface member and a connection hole becomes easy.

  In the fourth aspect of the invention, the valve pressing member and the discharge valve can be connected to the end face member by screwing the bolt, so that assembly is facilitated. In addition, the volume of the muffler chamber can be easily adjusted by changing the length of the bolt shaft.

  In the fifth aspect, the processing for forming the sound deadening chamber is facilitated.

  In 6th invention, the time which exhibits the silencing effect of a driving sound can be lengthened more, and the silencing effect can be improved.

  The seventh invention is effective because the silencing effect of the silencing chamber is increased even when the volume of the silencing chamber is small.

  In the eighth invention, the adhesion with the end face of the cylinder body is improved, and gas leakage between the cylinder chamber and the outside of the cylinder can be suppressed. Further, the gap in the height direction between the cylinder and the roller can be set uniformly.

  Hereinafter, an embodiment of a compressor according to the present invention will be described based on the drawings.

(First embodiment)
FIG. 1 is a schematic cross-sectional view showing a compressor according to a first embodiment of the present invention. The compressor 1 according to the present invention is a so-called high-pressure dome type rotary compressor, and a compressor 4 is disposed in a casing 4 and a motor 3 is disposed in an upper portion. The compressor 6 is driven by the rotor 6 of the motor 3 via the drive shaft 12.

  The compression unit 2 sucks low-pressure gas (refrigerant) from the accumulator 10 through the suction passage 11. This low-pressure gas is obtained by controlling a condenser, an expansion mechanism, and an evaporator (not shown) constituting an air conditioner as an example of a refrigeration system together with the compressor 1.

  The compressor 1 discharges the compressed high-temperature and high-pressure discharge gas from the compression unit 2 to fill the inside of the casing 4 and cools the motor 3 through the gap between the stator 5 and the rotor 6 of the motor 3. The discharge pipe 13 discharges the outside. Lubricating oil 9 is stored in the lower part of the high pressure region in the casing 4.

  FIG. 2 is a schematic plan view of the cylinder body 21 in FIG. As shown in FIGS. 1 and 2, the compression unit 2 includes a cylinder body 21 that forms a cylinder chamber 22, an upper end surface member 23 that is attached to the upper and lower end surfaces of the cylinder body 21 and covers the cylinder chamber 22, and And a lower end face member 24.

  The upper end face member 23 has a bearing portion 14 that protrudes toward the opposite side of the cylinder main body 21 side and has a through hole 14 a through which the drive shaft 12 is inserted at the center portion. Similarly, the lower end surface member 24 has a bearing portion 15 that protrudes toward the opposite side of the cylinder body 21 at the center portion and has a through hole 15a through which the drive shaft 12 is inserted. Yes.

  The drive shaft 12 penetrates the through hole 14a of the bearing portion 14 in the end surface member 23 from the motor 3 side and enters the inside of the cylinder chamber 22, and the front end side of the shaft is formed on the lower end surface member 24 of the bearing portion 15. It penetrates through the through hole 15 a and is supported by the bearing portion 14 and the bearing portion 15.

  A roller 27 fitted to a crank pin 26 provided on the drive shaft 12 is disposed in the cylinder chamber 22 so as to be able to revolve, and a compression action is performed by the revolving motion of the roller 27.

  As shown in FIG. 2, the cylinder chamber 22 is partitioned by a blade 28 provided integrally with the roller 27. That is, in the chamber on the right side of the blade 28 in FIG. 2, the suction passage 11 is opened on the inner surface of the cylinder chamber 22 to form a suction chamber 22 a. On the other hand, in the chamber on the left side of the blade 28, a discharge hole 23a shown in FIG. 1 is opened on the inner peripheral surface of the cylinder chamber 22 to form a discharge chamber 22b.

  Semi-circular bushes 25 and 25 are in close contact with both surfaces of the blade 28 for sealing. Lubrication is performed between the blade 28 and the bushes 25 and 25 with the lubricating oil 9.

  The operation of the compression unit 2 will be described. The crank pin 26 rotates eccentrically with the drive shaft 12, and the roller 27 fitted to the crank pin 26 makes the outer peripheral surface of the roller 27 the inner peripheral surface of the cylinder chamber 22. Revolves in contact with the lubricating oil 9.

  As the roller 27 revolves in the cylinder chamber 22, the blade 28 moves forward and backward with both side surfaces of the blade 28 being held by the bushes 25 and 25. Then, a low-pressure refrigerant is sucked into the suction chamber 22a from the suction pipe 11, compressed in the discharge chamber 22b to a high pressure, and then the high-pressure refrigerant is discharged from the discharge hole 23a.

  FIG. 3 is a schematic plan view of the vicinity of the upper end face member 23 in FIG. 1, and is an enlarged view of a portion where the discharge valve 31 and the valve pressing member 32 are installed. 4 is a cross-sectional view taken along line X1-X1 in FIG.

  As shown in FIGS. 3 and 4, the end surface member 23 has a hollow portion 23 c that is partially formed thinner than the surroundings. A discharge hole 23a communicating with the cylinder chamber 22 and a female screw for screwing a bolt 33 (fastening member) at a position closer to the outer periphery of the end face member 23 than the discharge hole 23a are screwed into the recess 23c. An engraved screw hole 23 b (fastening hole) and a communication hole 23 d that is continuous with the screw hole 23 b and has a smaller inner diameter than the screw hole 23 b that opens into the cylinder chamber 22 are formed.

  The screw hole 23b and the communication hole 23d are formed concentrically with each other with the axis of the hole in a direction perpendicular to the surface of the end face member 23. Further, as shown in FIG. 3, the screw hole 23 b is formed at a position overlapping the cylinder chamber 22 when viewed from the axial direction of the drive shaft 12.

  A plate-like discharge valve 31 and a plate-like valve pressing member 32 are provided in the recess 23 c in the end surface member 23.

  The valve pressing member 32 has a through hole 32 a formed with an inner diameter that is larger than the inner diameter of the screw hole 23 b of the end face member 23 and smaller than the outer diameter of the head 33 a of the bolt 33. The valve pressing member 32 is formed in a flat plate shape in the vicinity of the through hole 32a, and is formed to warp away from the discharge hole 23a in the vicinity of the discharge hole 23a.

  The discharge valve 31 has a through hole 31a having substantially the same diameter as the through hole 32a of the valve pressing member 32. And the said discharge valve 31 is arrange | positioned so that the discharge hole 23a may be obstruct | occluded in a free state. On the other hand, when the refrigerant (compressed gas) in the cylinder chamber 22 becomes higher than the pressure in the muffler chamber 41, this compressed gas elastically deforms the discharge valve 31 and is discharged from the discharge hole 23a. The valve pressing member 32 suppresses the movement of the discharge valve 31 so that the discharge valve 31 is not deformed (oscillated) more than necessary.

  The discharge valve 31 and the valve pressing member 32 are fixed to the end surface member 23 by tightening a bolt 33. That is, the head 33 a of the bolt 33 is disposed on the upper surface side (motor 3 side) of the valve pressing member 32, and the shaft portion 33 b of the bolt 33 is connected to the through hole 32 a of the valve pressing member 32 and the through hole 31 a of the discharge valve 31. The discharge valve 31 and the valve pressing member 32 are sandwiched between the head 33 a of the bolt 33 and the end surface member 23 in a state where the discharge valve 31 and the valve pressing member 32 are screwed into the screw holes 23 b of the end surface member 23. That is, the discharge valve 31 and the valve pressing member 32 are urged toward the end surface member 23 by the head 33 a of the bolt 33 and are fixed to the end surface member 23.

  In the compressor 1, after the discharge valve 31 and the valve pressing member 32 are connected to the end surface member 23 by the bolt 33, the surface processing of the end surface member 23 facing the end surface of the cylinder body 21 is performed. ing. Then, the end surface member 23 with the discharge valve 31 and the valve pressing member 32 attached thereto is fixed to the cylinder body 21 by using a plurality of other bolts (not shown).

  The shaft portion 33b of the bolt 33 is configured such that the tip portion is positioned at a substantially central position in the axial direction of the screw hole 23b in a state where the discharge valve 31 and the valve pressing member 32 are sandwiched by screwing into the screw hole 23b. ing. That is, the screw hole 23b has a predetermined space 50 (hereinafter referred to as a muffler chamber 50) on the tip side of the shaft portion 33b of the bolt 33. In order to prevent fluid from leaking from the cylinder chamber 22 to the outside through the space between the shaft portion 33b of the bolt 33 and the screw hole 23b, there is a gap between the shaft portion 33b of the bolt 33 and the screw hole 23b. Seal tape is sandwiched.

  The muffler chamber 50 is a space that communicates with the cylinder chamber 22 through the communication hole 23d. Therefore, the silencing chamber 50 and the communication hole 23d constitute a silencing mechanism using a so-called Helmholtz resonator. This silencing mechanism has a characteristic that the silencing effect is enhanced with respect to the airflow sound in a specific frequency band. Since the frequency band having a high silencing effect is determined based on the volume of the silencing chamber 50, the cross-sectional area of the communication hole 23d, the length, and the like, in consideration of the operating sound of the compressor that changes depending on the operating conditions of the compressor 1, The volume of the muffler chamber 50, the cross-sectional area of the communication hole 23d, the length, and the like are designed.

  As shown in FIG. 1, a cup-type muffler main body 40 is attached to the end surface member 23 so as to cover the discharge valve 31. The muffler main body 40 is fixed to the end surface member 23 by a fixing member such as a bolt. A muffler chamber 41 is formed by the muffler body 40 and the end face member 23. The muffler chamber 41 and the cylinder chamber 22 communicate with each other through the discharge hole 23a. The muffler main body 40 has a hole 40a. The hole 40 a communicates the muffler chamber 41 with the outside of the muffler main body 40.

  As described above, the compressor 1 includes the cylinder body 21 that forms the cylinder chamber 22, the end face member 23 that is attached to the end face of the cylinder body 21 and that has a discharge hole 23 a communicating with the cylinder chamber 22, and the end face A discharge valve 31 for opening and closing the discharge hole 23a of the member 23, a valve pressing member 32 disposed so as to sandwich the discharge valve 31 between the end face member 23, the discharge valve 31 and the valve pressing member 32, and a bolt 33 for connecting the end face member 23 to the end face member 23. The end face member 23 is a screw hole 23b into which the bolt 33 is inserted and a part of the screw hole 23b. A silencer chamber 50 communicating with the cylinder chamber 22 is provided.

  According to this configuration, a predetermined space in a part of the screw hole 23 b functions as the muffler chamber 50. That is, the silencer chamber 50 and the communication hole 23d constitute a Helmholtz resonator, and the airflow noise of the refrigerant in the cylinder chamber 22 can be reduced. In the compressor 1, by processing the screw hole 23b for screwing the bolt 33 into the hollow portion 23c of the end face member 23, it is possible to simultaneously form the silencing chamber 50 that becomes the resonance chamber of the Helmholtz resonator. Therefore, it is not necessary to process the silencing chamber 50 in a separate process, and the manufacturing cost of the compressor 1 can be reduced.

  Further, since the screw hole 23b including the silencing chamber 50 is formed in the end face member 23, it is not necessary to perform processing for forming the silencing chamber 50 in the cylinder body 21. Thereby, the silencing chamber 50 can be formed without performing complicated processing on the cylinder body 21, and the operation noise can be reduced.

  Further, the silencing chamber 50 communicates with the cylinder chamber 22 through a communication hole 23d having a smaller diameter than the inner diameter of the screw hole 23b, and a silencing structure is formed by a Helmholtz resonator. By appropriately designing the length, diameter, etc. of the hole 23d, it is possible to reduce the operation sound in a desired frequency region.

  Further, since the screw hole 23b and the communication hole 23d are formed concentrically, the processing of the screw hole 23b and the communication hole 23d in the end face member 23 becomes easy. For example, after passing the communication hole 23d through the end surface member 23, a hole having a diameter larger than that of the communication hole 23d is formed up to an intermediate portion in the thickness direction of the end surface member 23 using the communication hole 23d as a lower hole. Can be screwed to form the screw hole 23b. Further, if the communication hole 23d is formed in advance by a cast hole or a sintering die, processing is not necessary.

  Further, since the discharge valve 31 and the valve pressing member 32 are fixed to the end face member 23 by the bolt 33, the assembly is facilitated. For example, the bolt 33 can be retightened as compared with the case of fixing with a rivet, so that the alignment of the discharge valve 31 and the discharge hole 23a can be easily corrected. Also, the seal check can be easily aligned.

  Further, since the space on the tip end side of the shaft portion 33b of the bolt 33 in the screw hole 23b is used as the sound deadening chamber 50, the volume of the sound deadening chamber 50 can be easily increased by changing the length of the shaft portion 33b of the bolt 33. Can be adjusted. This facilitates adjustment of the frequency band having a high silencing effect.

  Further, since the silencing chamber 50 is formed at a position overlapping the cylinder chamber 22 when viewed from the axial direction of the drive shaft 12, a communication hole 23d for communicating the silencing chamber 50 and the cylinder chamber 22 is provided with a compression mechanism. It can be formed by machining in a direction parallel to the axial direction of the drive shaft 12. As a result, the processing for forming the muffler chamber 50 communicating with the cylinder chamber 22 is facilitated.

  Further, in the compressor 1, the discharge valve 31 and the valve pressing member 32 are connected to the end surface member 23 by the bolt 33, and then the surface of the end surface member 23 facing the end surface of the cylinder body 21 is subjected to planar processing. Yes.

  According to this configuration, even when the surface facing the end face of the cylinder body 21 in the end face member 23 when connected by the bolt 33 is strained in the out-of-plane direction, planar processing is performed after the connection. Adhesion between the end face member 23 and the end face of the cylinder main body 21 is improved, and gas leakage between the cylinder chamber 22 and the outside of the cylinder can be suppressed. Further, the gap in the height direction between the cylinder and the roller can be set uniformly.

  Moreover, although the said compressor 1 is incorporated in an air conditioner and is used in order to compress a refrigerant | coolant, it is especially effective when compressing a carbon dioxide especially as a refrigerant | coolant. Usually, when carbon dioxide is used as a refrigerant, it is necessary to compress at a higher compression ratio than when using chlorofluorocarbon or the like as a refrigerant. In the compression at such a high compression ratio, even if the volume of the noise reduction chamber 50 is small, the noise reduction effect by the noise reduction chamber 50 is increased. Therefore, the compressor 1 is used as an air conditioner compressor using carbon dioxide as a refrigerant. It is desirable to use

  In addition, not only the structure which connects the screw hole 23b and the cylinder chamber 22 by the communication hole 23d, but it is good also as a structure which penetrated the screw hole 23b to the end surface member 23 so that a modification may be shown in FIG. In this configuration, a side branch type silencing mechanism can be configured by the space 51 (silence chamber) on the distal end side of the shaft portion 33b of the bolt 33. According to the said structure, since the process of the communication hole 23d becomes unnecessary, a process cost can be reduced.

(Second Embodiment)
Next, a compressor according to the second embodiment will be described. FIG. 6 is a schematic plan view of the vicinity of the end surface member of the compressor according to the second embodiment of the present invention, and is an enlarged view of a portion where the discharge valve 31 and the valve pressing member 32 are installed. FIG. 7 is a cross-sectional view taken along the line X2-X2 in FIG. The compressor according to the second embodiment is different from the first embodiment in the position of the screw hole for screwing the shaft portion 33b of the bolt 33 in the end surface member 23. The same members as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 6, the screw hole 23 e (fastening hole) is formed at a position close to the outer periphery of the end face member 23 so that at least a part thereof overlaps the cylinder chamber 22 when viewed from the axial direction of the drive shaft 12. ing. Further, as shown in FIG. 7, the screw hole 23 e is formed so as to penetrate the end face member 23 in parallel with the axial direction of the drive shaft 12, and the screw hole 23 e is viewed from the axial direction of the drive shaft 12. Thus, the cylinder chamber 22 communicates with the cylinder chamber 22 through an opening 23f which is a portion overlapping the cylinder chamber 22.

  Accordingly, the screw hole 23e has an opening area smaller than at least the cross-sectional area of the screw hole 23e between the space 52 (hereinafter referred to as the muffler chamber 52) on the tip end side of the shaft portion 33b of the bolt 33 and the cylinder chamber 22. The sound can be communicated through the opening 23f, and a silencer mechanism using a Helmholtz resonator can be configured without separately forming a communication hole for communicating the silencer chamber 52 and the cylinder chamber 22. Therefore, a silencer mechanism using a Helmholtz resonator can be configured with simpler processing.

  In addition, the compressor according to the embodiment is a rotary compressor that compresses the gas in the cylinder chamber 22 when the roller 27 disposed in the cylinder chamber 22 moves along the inner wall surface of the cylinder chamber 22. Since the silencing chamber 52 communicates with the cylinder chamber 22 in the vicinity of the inner wall surface of the cylinder chamber 22, the time required for closing the opening 23 f serving as a communication path between the silencing chamber 52 and the cylinder chamber 22 by the roller 27 is shortened. can do. As a result, it is possible to extend the time for which the noise reduction effect of the driving sound is exhibited, and to improve the noise reduction effect.

(Third embodiment)
Next, a compressor according to a third embodiment will be described. FIG. 8 is a schematic plan view of the vicinity of the end face member of the compressor according to the third embodiment of the present invention, and is an enlarged view of a portion where the discharge valve 31 and the valve pressing member 32 are installed. FIG. 9 is a sectional view taken along line X3-X3 in FIG. The compressor according to the third embodiment is different from the first embodiment in the position of the screw hole and the communication hole for screwing the shaft portion 33b of the bolt 33 in the end surface member 23. The same members as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 8, the screw hole 23 g (fastening hole) is formed in the end surface member 23 at a position that does not overlap the cylinder chamber 22 when viewed from the axial direction of the drive shaft 12. As shown in FIG. 9, the screw hole 23 g is formed so as to penetrate the end surface member 23 in parallel with the axial direction of the drive shaft 12. A space 53 (hereinafter referred to as a muffler chamber 53) on the tip end side of the shaft portion 33b of the bolt 33 in the screw hole 23g communicates with the cylinder chamber 22 through the communication hole 23h. The communication hole 23 h opens in the inner wall of the sound deadening chamber 53 and extends obliquely downward from the sound deadening chamber 53 side toward the center of the end face member 23 and opens in the lower surface of the end face member 23.

  Thus, even when the screw hole 23g constituting the sound deadening chamber 53 needs to be arranged at a position that does not overlap the cylinder chamber 22 when viewed from the axial direction of the drive shaft 12, the sound deadening chamber 53 and the cylinder chamber 22 are arranged. A communication hole 23h that communicates can be formed in the end surface member 23 to constitute a silencing mechanism.

  As shown in a modified example in FIG. 10, the silencer chamber 53 and the cylinder chamber 22 are communicated with each other by forming a recess 23 i that is continuous with the opening of the screw hole 23 g on the lower surface of the end surface member 23. You can also.

  Further, as shown in FIG. 11, a communication hole 21 b may be formed in the cylinder body 21 so that the screw hole 23 g and the cylinder chamber 22 communicate with each other. Also, as shown in FIG. 12, by chamfering a part of the upper end of the inner wall of the cylinder chamber 22 to form a chamfered portion 21c, the screw hole 23g and the cylinder chamber 22 communicate with each other via the chamfered portion 21c. You may comprise. In this case, only the connecting passage (communication hole 21b or chamfered portion 21c) for connecting the silencing chamber 53 and the cylinder chamber 22 formed in the end face member 23 to the cylinder body 21 without processing the silencing chamber in the cylinder body 21 is used. If it processes to 21, the silencer mechanism can be comprised. Therefore, as compared with the case where both the silencing chamber and the connecting passage are machined into the cylinder body 21, machining into the cylinder body 21 is simplified, and the silencing mechanism can be configured without excessively increasing the machining cost. .

(Fourth embodiment)
Next, a compressor according to a fourth embodiment will be described. FIG. 13: is a principal part expanded sectional view of the compressor which concerns on 4th Embodiment of this invention, and is sectional drawing equivalent to FIG. 9 in 3rd Embodiment. The compressor according to the fourth embodiment uses a rivet 34 (fastening member) to attach the discharge valve 31 and the valve pressing member 32 to the end surface member 23. The same members as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the compressor according to the fourth embodiment, the end surface member 23 is formed with a through hole 23j (fastening hole) through which the shaft portion 34b of the rivet 34 can be inserted. Further, the end portion of the through hole 23j on the cylinder body 21 side is subjected to counterboring so that the head portion 34a of the rivet 34 can be accommodated. Further, the end surface member 23 is formed with a communication hole 23k that allows the through hole 23j and the cylinder chamber 22 to communicate with each other.

  The valve pressing member 32, the discharge valve 31, and the end surface member 23 are clamped by being sandwiched between heads 34 a and 34 a at both ends of the shaft portion with the shaft portion 34 b of the rivet 34 penetrating therethrough. At this time, between the inner wall of the shaft portion 34b of the rivet 34 and the surrounding through holes (the through hole 32a of the valve pressing member 32, the through hole 31a of the discharge valve 31, and the through hole 23j of the end surface member 23), A predetermined gap 54 is formed, and both ends of the gap 54 are closed by heads 34 a and 34 a of the rivet 34. The gap 54 communicates with the cylinder chamber 22 through the communication hole 23k. Accordingly, the noise reduction mechanism is constituted by the gap 54 as the noise reduction chamber and the communication hole 23k.

  As described above, even in the configuration in which the discharge valve 31 and the valve pressing member 32 are fixed to the end surface member 23 using the rivet 34, the noise reduction mechanism can be configured without processing the cylinder body 21. In this case, since the process of screwing a female screw into the fastening hole of the end face member 23 is not required, the end face member 23 can be easily processed.

  As shown in FIG. 14, a screw hole 21a is formed in the cylinder body 21, and a shaft portion 35b of a bolt 35 (fastening member) is screwed into the screw hole 21a. The valve pressing member 32 and the discharge valve 31 may be sandwiched between the end surface member 23 and the end surface member 23, and the valve pressing member 32 and the discharge valve 31 may be fixed to the end surface member 23.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  By using the present invention, it is possible to form a muffler chamber without performing complicated processing, and it is possible to reduce operation noise.

It is a typical sectional view showing the compressor concerning a 1st embodiment of the present invention. It is a typical top view of the cylinder main-body part in FIG. FIG. 2 is a schematic plan view of the vicinity of an upper end face member in FIG. 1. It is X1-X1 sectional drawing in FIG. It is a figure which shows the modification of the compressor which concerns on 1st Embodiment. It is a typical top view of an end face member neighborhood part of a compressor concerning a 2nd embodiment of the present invention. It is X2-X2 sectional drawing in FIG. It is a typical top view of the end face member neighborhood part of the compressor concerning a 3rd embodiment of the present invention. It is X3-X3 sectional drawing in FIG. It is a figure which shows the modification of the compressor which concerns on 3rd Embodiment. It is a figure which shows the modification of the compressor which concerns on 3rd Embodiment. It is a figure which shows the modification of the compressor which concerns on 3rd Embodiment. It is a principal part expanded sectional view of the compressor which concerns on 4th Embodiment of this invention. It is a figure which shows the modification of the compressor which concerns on 4th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compressor 12 Drive shaft 21 Cylinder main body 21b Communication hole 22 Cylinder chamber 23 End surface member 23a Discharge hole 23b, 23e, 23g Screw hole (fastening hole)
23f Opening 23d, 23k, 23h Communication hole 23i Recess 23j Through hole (fastening hole)
27 Roller 31 Discharge valve 32 Valve holding member 33, 35 Bolt (fastening member)
34 Rivet (fastening member)
33a, 34a, 35a Head 34b, 35b Shaft 50-54 Silence room

Claims (8)

A cylinder body (21) forming a cylinder chamber (22);
An end face member (23) attached to the end face of the cylinder body and having a discharge hole (23a) communicating with the cylinder chamber;
A discharge valve (31) for opening and closing the discharge hole of the end face member;
A valve pressing member (32) disposed so as to sandwich the discharge valve with the end surface member;
Fastening members (33, 34, 35) for connecting the discharge valve and the valve pressing member to the end face member;
With
The end surface member has a fastening hole (23b, 23e, 23g, 23j) into which the fastening member is inserted, and a muffler chamber (50, 51, 52, 53, 54) communicating with the cylinder chamber. ,
The compressor (1), wherein the silencer chamber is formed as a part of the fastening hole.   2. The compressor according to claim 1, wherein the noise reduction chamber communicates with the cylinder chamber through a communication hole (23 d, 23 k, 23 h, 21 b) having a smaller diameter than the diameter of the fastening hole.   The compressor according to claim 2, wherein the fastening hole and the communication hole are formed concentrically. The fastening member is constituted by a bolt,
The shaft portion of the bolt is screwed into a female screw threaded into at least a part of the fastening hole, and the discharge valve and the valve pressing member are interposed between the head portion of the bolt and the end surface member. Pinch
The compressor according to any one of claims 1 to 3, wherein the silencer chamber is provided on a distal end side of a shaft portion of the bolt in the fastening hole.   The silencer chamber is formed at a position at least partially overlapping the cylinder chamber when viewed from the axial direction of the drive shaft (12) of the compression mechanism. The compressor as described in any one of. A roller (27) disposed in the cylinder chamber has a rotary compression mechanism that compresses the gas in the cylinder chamber by moving along the inner wall surface of the cylinder chamber;
The compressor according to any one of claims 1 to 5, wherein the silencing chamber communicates with the cylinder chamber in the vicinity of an inner wall surface of the cylinder chamber.   It is used in order to compress the carbon dioxide used as a refrigerant | coolant of the said air conditioner while being integrated and used for an air conditioner, It is any one of Claim 1-6 characterized by the above-mentioned. Compressor.   The surface processing of the end surface member facing the end surface of the cylinder body in the end surface member is performed after the discharge valve and the valve pressing member are connected to the end surface member by the fastening member. The compressor according to any one of claims 1 to 7.

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