JP5324893B2 - Compressor valve plate device - Google Patents

Abstract

Provided is a specific structure for a compressor valve plate device, which can ensure smooth operation of a suction valve in terms of suction valve sticking force due to lubricant oil, and can be mass-produced at low cost with high efficiency. The compressor valve plate device comprises; a valve plate having a suction hole and a discharge hole; a suction valve; and a discharge valve. At least a part of a gas filling chamber capable of introducing and filling gas with a higher pressure than suction gas pressure in a suction chamber between the valve plate and the suction valve is constituted in the valve plate, while a communication hole communicating with a surface at the valve closing side of the suction valve is provided to the valve plate. At least a part of a gas introduction route for introducing the higher-pressure gas into the communication hole is formed on the discharge valve formed from a thin plate. In addition, a part of the gas introduction route formed on the discharge valve is sealed by a member disposed on a surface facing the discharge valve.

Description

  The present invention relates to a valve plate device for a compressor, and more particularly to a valve plate device for a compressor that allows a suction valve to perform a smooth operation.

  For example, in a piston compressor having a plurality of cylinders, a valve plate device is usually interposed between a cylinder head having a suction chamber and a discharge chamber and a cylinder block having a cylinder bore. The valve plate device is disposed on a surface of the valve plate facing the cylinder block, the suction plate communicating with the suction chamber and the cylinder bore, and the discharge plate communicating with the cylinder bore and the discharge chamber. The valve plate device includes a suction valve that opens and closes a hole, and a discharge valve that is disposed on a surface of the valve plate facing the cylinder head and opens and closes the discharge hole.

  This valve plate device is for preventing gas from flowing backward when a piston inserted in a cylinder bore so as to be reciprocally movable is in a suction stroke and a discharge stroke. More specifically, when the piston is in the intake stroke, the intake valve opens the intake hole of the valve plate, the discharge valve closes the discharge hole of the valve plate, and when the piston is in the discharge stroke, the intake valve By closing the suction hole and opening the discharge hole of the valve plate by the discharge valve, the backflow of gas is prevented.

  In the case of a conventional general valve plate device, the valve plate is a flat plate body and is formed in a shape having no irregularities. On the other hand, the gas sucked and compressed by the compressor contains a mist of lubricating oil for lubricating the compressor. When the mist-like lubricating oil contained in this gas touches the valve plate, a part of it becomes an oil film and adheres to the valve plate. The lubricating oil adhering to the valve plate enters between the valve plate and the suction valve, and makes it difficult to open the suction valve due to the sticking force due to the surface tension, adhesive force, and the like. As a result, in order to open the suction valve, in addition to the sticking force due to the rigidity of the suction valve itself, it is necessary to apply extra force due to the sticking force due to the surface tension or adhesive force of the lubricating oil. Therefore, it is necessary to increase the pressure difference between the cylinder bore and the suction chamber, and the piston needs to do extra work. Also, if the stuck suction valve is opened, there is a risk of hitting the recess that regulates the degree of valve opening, which may cause noise and vibration.

For the discharge valve side, a structure in which a gas filling recess is formed in the portion of the valve plate facing the discharge valve in order to prevent over-compression caused by the difficulty of opening the discharge valve due to lubricating oil. 1 is disclosed. However, this Patent Document 1 does not mention the suction valve side. Patent Document 2 discloses a structure in which a concave groove for introducing suction pressure is formed on the surface of the valve plate facing the suction valve. However, since the suction pressure is relatively low, the opening operation of the suction valve is disclosed. It is difficult to fully assist.
Japanese Patent Laid-Open No. 11-166480 Japanese Utility Model Publication No. 5-89876

  In view of the problems associated with the sticking of the suction valve as described above, it is still unpublished. However, the applicant of the present invention previously removed part of the discharge gas behind the suction valve (between the suction valve and the valve plate). A mechanism for forcibly opening the intake valve using the pressure of the discharged gas (referred to as a forced valve opening mechanism) has been proposed (Japanese Patent Application No. 2008-168501). The forced valve opening mechanism has been proven to be effective in reducing sticking even in actual machines. In this actual machine verification machine, the path to return the discharge gas to the back side of the intake valve (gas introduction path) was formed by carving a groove in the valve plate, but in this form the valve plate is made of a relatively thick plate, In mass production, there is a concern that the burden on the press machine will increase and the manufacturing cost will increase. Therefore, in the above proposal, it is also proposed to form this gas introduction path in a discharge valve made of a thin plate, but only a fundamental structure is proposed but no specific structure is proposed. We did not propose a desirable structure in. Therefore, it cannot be said that specific problems to be actually carried out and problems to be solved have been clarified, and the solution means has not been clarified.

  Accordingly, the problem of the present invention is caused not only by focusing on the problems on the suction valve side as described above, but also by focusing on the previously proposed technique by the applicant, and the suction valve is difficult to open due to the sticking force of the lubricating oil. In addition to providing a structure that can prevent or suppress the increase in power consumption and the generation of noise and vibration, it is possible to reduce the manufacturing cost by reducing the burden on the press machine, etc. even during mass production. Another object of the present invention is to provide a valve plate device for a compressor having a more specific desirable structure.

In order to solve the above problems, a valve plate device for a compressor according to the present invention is interposed between a cylinder head having a suction chamber and a discharge chamber and a cylinder block having a cylinder bore into which a piston is reciprocally inserted. A valve plate device for a compressor that includes a suction hole that communicates the suction chamber and the cylinder bore, a valve plate that communicates the cylinder bore and the discharge chamber, and the cylinder block of the valve plate And a suction valve that opens and closes the suction hole, and a discharge valve that is disposed on the face of the valve plate facing the cylinder head and opens and closes the discharge hole. In the plate device,
The valve plate constitutes at least a part of a gas filling chamber capable of introducing and filling a gas having a pressure higher than the suction gas pressure in the suction chamber between the valve plate and the suction valve, and the suction valve A communication hole that communicates with the valve-closing surface of the valve, and at least a part of a gas introduction path for introducing a gas having a pressure higher than the suction gas pressure in the suction chamber into the communication hole is formed in the discharge valve. In addition, a part of the gas introduction path formed in the discharge valve is sealed by a member disposed on a surface facing the discharge valve.

  In such a valve plate device for a compressor according to the present invention, when the suction valve is closed, the suction valve is sucked into the valve-closing surface of the suction valve via the gas introduction path and the communication hole. A gas having a pressure higher than the pressure of the suction gas in the room can be introduced, and the introduced gas is filled in a gas filling chamber formed so that the gas can be introduced and filled between the valve plate and the suction valve. . In this way, the gas having a pressure higher than the pressure of the suction gas in the suction chamber is led to the valve closing side surface (the surface facing the valve plate) of the closed suction valve through the communication hole. By filling the part, the pressure in the cylinder bore decreases during the piston suction stroke (cylinder bore gas expansion stroke), and a differential pressure is generated between the pressure of the filling gas and the cylinder bore pressure. Due to this pressure difference, a force in the direction of pushing up the suction valve (in the direction of opening) is generated. By applying this force in the valve opening direction, the suction valve can be opened quickly and smoothly even if there is sticking with lubricating oil, and the piston does not have to do extra work, so compression The power consumption of the machine is reduced. In addition, since the suction valve opens quickly and smoothly, noise and vibration that may have occurred due to the suction valve striking a recess are reduced. Then, at least a part of the gas introduction path for introducing a gas having a pressure higher than the suction gas pressure in the suction chamber into the communication hole is formed in a discharge valve made of a relatively thin plate member, whereby the gas introduction path Formation is facilitated, and when formed by a press, the burden on the press machine is reduced, and the manufacturing cost for mass production can be reduced. In addition, since at least a part of the gas introduction path is formed as a discharge valve made of an easily formed thin plate member, the degree of freedom in handling the gas introduction path is improved, and the intake valve can be operated for various models. It becomes possible to develop a forced valve opening structure for stabilization. Further, since at least a part of the gas introduction path is formed in the discharge valve, even when the remaining part of the gas introduction path is formed in the valve plate, the length of the gas introduction path to be formed in the valve plate is reduced. It can be reduced, and the durability of the valve plate against gas blow-through (blow-through durability) can be improved. Further, the discharge valve is formed by a member (for example, a gasket interposed between the discharge valve and the cylinder head, a discharge valve retainer integrated gasket, or the valve plate) disposed on the surface facing the discharge valve. By sealing a part of the gas introduction path formed, a gas having a pressure higher than the pressure of the suction gas in the suction chamber guided to the valve closing side surface of the suction valve through the gas introduction path is The intake valve is efficiently introduced into the valve closing side of the intake valve in a state where the desired pressure is maintained, and a quick and smooth opening operation of the intake valve is more reliably ensured.

  In the above-described valve plate device for a compressor according to the present invention, at least a part of the gas introduction path formed in the discharge valve corresponds to at least a part of the partition wall between the discharge chamber and the suction chamber in the cylinder head. It can be set as the structure which passes along the site | part. In other words, at least a part of the gas introduction path is placed in a position within a range where the partition wall of the cylinder head is located. Since the surface pressure of the partition of the cylinder head is high at the site where it is fixed by fastening, etc., the surface pressure of the partition of the cylinder head is used to improve the sealing performance of the gas introduction path at that location. It is possible to reduce gas leakage from the gas introduction path.

  Further, at least a part of the gas introduction path formed in the discharge valve may be configured to pass through a portion corresponding to at least a part of the outer peripheral wall of the cylinder head. Similarly to the above, since the surface pressure of the outer peripheral wall portion of the cylinder head is high, by sealing at least a part of the gas introduction route at a position within the range where the outer peripheral wall is located, the sealing performance of the gas introduction route at that portion is improved. It is possible to reduce gas leakage from the gas introduction path.

  Further, a bead that seals at least a part of the gas introduction path formed in the discharge valve or a part including the part and the periphery of the communication hole is formed on at least a part of the member disposed on the surface facing the discharge valve. It can be set as the formed structure. By forming such a bead, it becomes possible to locally increase the seal surface pressure of the bead part, so that the sealing performance of the gas introduction path surrounded by this bead part can be improved, and the gas introduction Gas leakage from the path can be reduced.

  Moreover, it can be set as the structure by which at least one part of the at least any one of the member arrange | positioned at the surface facing the said discharge valve and the said discharge valve is formed with the polymeric material. By selecting an appropriate polymer material that can be in close contact with the opposing surface, it is possible to improve the sealing performance of the gas introduction path by employing a member in which at least a part is formed of the polymer material. Thus, gas leakage from the gas introduction path can be reduced.

  Moreover, it is preferable that at least a part of the gas introduction path formed in the discharge valve is formed by punching. Since the discharge valve is made thinner than the valve plate, it can be easily punched, and a predetermined gas introduction path can be formed in the discharge valve easily and accurately with a small processing load by punching. Thus, the processing time and the manufacturing cost can be reduced.

  Further, at least a part of the gas introduction path formed in the discharge valve can be formed by bead processing. If the passage is formed by bead processing, the bead portion can have both a passage forming function and a sealing function, and a gas introduction path having a good sealing property can be easily formed with a simple structure. Is possible.

  Also, a structure in which a sealing material in which at least a part of a polymer material is used is sandwiched between at least a part between the discharge valve and a member (for example, a gasket, a valve plate) disposed on a surface facing the discharge valve. It is also possible to adopt. By providing such a sealing material, the sealing performance of the gas introduction path formed in the discharge valve can be improved. If this sealing material is extended to the periphery of the communication hole, the sealing performance for the communication hole is also improved. Can be made.

  Moreover, it is also possible to have a structure in which at least a part between the discharge valve and a member disposed on the surface facing the discharge valve is joined to each other by an adhesive polymer material. In such a structure, since both members are directly bonded and joined by the polymer material, the sealing performance of a necessary portion can be easily and reliably improved.

  The discharge valve and the valve plate need only be coupled by an appropriate coupling means. For example, a structure in which at least one of the discharge valve and the valve plate is coupled by a rivet or a bolt can be employed.

  In order to ensure a good sealing property, it is preferable to set a seal width of at least a part of the gas introduction path formed in the discharge valve to a certain extent, for example, a seal width of 0.2 mm. It is preferable that the above is set.

  Further, although the discharge valve is not particularly limited in its support form, for example, at least a part of the portion located in the discharge chamber is supported by the cylinder head in order to hold it in a predetermined form between the cylinder head and the valve plate. The structure can be made.

  Further, at least a part of the gas introduction path formed in the discharge valve can be subjected to barrel polishing. By barrel polishing, the inner surface of the gas introduction path at this part is processed into a smooth surface without irregularities, so that the gas flow resistance in the passage is greatly reduced, and the introduced gas can be easily adjusted to the desired pressure. It can be introduced into the communication hole in a maintained state.

  In the present invention, the gas introduction path formed in the discharge valve may be extended with a constant width, but the width of the gas introduction path is partially changed. It is also possible.

  Further, when at least a part of the gas introduction path formed in the discharge valve passes through a part corresponding to the partition wall between the discharge chamber and the suction chamber of the cylinder head, the width of the gas introduction path in the part is The width is preferably smaller than the width of the partition wall between the discharge chamber and the suction chamber. By adopting such a passage width, it is possible to improve the sealing performance of the gas introduction path at this part by utilizing the high seal surface pressure of the part corresponding to the partition wall.

  Further, the gas introduction path formed in the discharge valve may be bent or curved in the middle. The passage width and the extending form may be determined in consideration of the sealing property required for the gas introduction path.

  In the present invention, the path of the gas introduction path can take various forms. For example, the gas introduction path may be formed in the order of valve plate-discharge valve-valve plate, or may be formed in the order of valve plate-discharge valve.

  Moreover, as a path | route for introducing gas including the said communicating hole, it can be set as the form currently formed by the discharge valve and the valve plate.

  The above-described valve plate apparatus for a compressor according to the present invention is basically applicable to any compressor. In particular, the present invention is suitable for application to a compressor used in a vehicle air conditioner in which a stable operation is particularly required for the intake valve and noise and vibration are desired to be suppressed.

  According to the valve plate device of the compressor according to the present invention, a force in the valve opening direction is applied to the suction valve by the gas having an appropriate pressure introduced and filled in the gas filling chamber on the valve plate side surface of the suction valve. As a result, it is possible to prevent the suction valve from becoming difficult to open due to the sticking force of the lubricating oil, increase in the power consumption of the compressor caused by the suction valve becoming difficult to open, and the suction valve to open It is possible to prevent or suppress the generation of noise and vibration. In addition, a gas path having a desired performance can be easily formed by a structure in which at least a part of a gas introduction path for guiding a gas having an appropriate pressure is formed in a relatively thin discharge valve and a structure for sealing the gas introduction path. become. And in the present invention, since various forms at the time of mass production of such a valve plate device are specifically presented, it becomes possible to reduce the burden on the press machine and reduce the manufacturing cost, In reality, this valve plate device can be appropriately deployed in various compressors.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 illustrates a swash plate type variable capacity compressor used in a vehicle air conditioner, showing an example of a compressor to which the valve plate device according to the present invention can be applied. FIGS. 2 to 9 illustrate the present invention. The valve plate apparatus of the compressor which concerns on 1st embodiment of this is shown. A compressor 1 shown in FIG. 1 includes a cylinder head 2 having a suction chamber and a discharge chamber therein, a cylinder block 5 having a cylinder bore 4 into which a piston 3 is reciprocally inserted, and a front housing 6. A crank chamber 7 is formed by the cylinder block 5 and the front housing 6. A drive shaft 9 through which a rotational driving force from the outside is transmitted through a pulley 8 or the like is inserted into the crank chamber 7, and a rotor 10 that rotates integrally with the drive shaft 9 and a hinge connected to the rotor 10. The piston is connected via a mechanism 11, a swash plate 12 that can be tilted via the hinge mechanism 11, and a pair of shoes 13 that are slidably contacted with the swash plate 12 to convert the rotational movement of the swash plate 12 into a reciprocating motion. 3 is reciprocated. In such a compressor 1, the valve plate device 20 according to the present invention is interposed between the cylinder head 2 and the cylinder block 5.

  In the present embodiment, the valve plate device 20 is configured as shown in FIGS. As shown in FIG. 2, the valve plate device 20 includes a suction hole 22 formed in the cylinder head 2 for communicating with the cylinder bore 4, and a cylinder bore 4 (in the illustrated example, the adjacent cylinder bore 4 is shown). And a discharge plate 24 having a discharge hole 24 communicating with the discharge chamber 23 formed in the cylinder head 2, and a suction plate 22 disposed on a surface of the valve plate 25 facing the cylinder block 5. A suction valve 26 that opens and closes the valve, a discharge valve 27 that opens and closes the discharge hole 24, and a retainer portion 28 that regulates the opening of the discharge valve 27 are integrated on the surface of the valve plate 25 that faces the cylinder head 2. The retainer-integrated gasket 29 is formed. The valve plate 25 is introduced and filled with a gas having a pressure higher than the suction gas pressure in the suction chamber 21 (in this embodiment, the gas in the discharge chamber 23) between the valve plate 25 and the suction valve 26. A communication hole 31 that constitutes at least a part of the possible gas filling chamber 30 and communicates with the surface on the valve closing side of the suction valve 26 is provided, and the discharge valve 27 has the suction hole 31 connected to the communication hole 31. At least a portion 33 of a gas introduction path 32 for introducing a gas having a pressure higher than the intake gas pressure in the room is formed. The passage portion 33 can be formed by punching the discharge valve 27, for example. In the illustrated example, the gas introduction path 32 to the communication hole 31 includes a passage portion 33 formed in the discharge valve 27 and passage portions 34 and 35 formed in the valve plate 25 so as to communicate with the passage portion 33. In the illustrated example, the gas filling chamber 30 is formed by the communication hole 31 and a gas filling recess 36 formed on the surface of the valve plate 25 facing the suction valve 26. A part (passage portion 33) of the gas introduction path formed in the discharge valve 27 is sealed by a member (in the illustrated example, a retainer-integrated gasket 29) disposed on the surface facing the discharge valve 27. . The arrows in FIG. 2 indicate the flow of gas introduced into the communication hole 31 through the gas introduction path 32. Note that reference numeral 37 in FIG. 2 denotes a recess formed in the inner peripheral edge of the cylinder bore 4 that restricts the opening of the intake valve 26 at the tip of the intake valve 26. FIG. 3 shows the configuration of 20 parts of the valve plate device except the retainer integrated gasket 29 in the above structure. 2 is a longitudinal section viewed along the line AA shown in FIGS. 8 and 9 described later.

  FIG. 4 is a plan view of only the valve plate 25 in the valve plate device 20, in which a suction hole 22, a discharge hole 24, a communication hole 31, and gas introduction path passage portions 34 and 35 are formed. In addition, a rivet hole or bolt hole 41 for coupling the discharge valve 27 is provided. FIG. 5 is a perspective plan view when the discharge valve 27 is provided on the valve plate 25 shown in FIG. 4. Each cylinder bore 4, the suction hole 22, the discharge hole 24, the suction valve 26, the discharge valve 27, and its The positional relationship among the reed valve portion 27a, the communication hole 31, and the gas introduction path 32 is clearly shown. FIG. 6 is a partially enlarged view of FIG. Further, FIG. 7 is a plan view when the retainer-integrated gasket 29 is assembled on the discharge valve 27 shown in FIG. 8 is a perspective plan view in the assembled state of FIG. 7, FIG. 9 is a partially enlarged view thereof, and the cross section shown in FIG. 2 is seen along the line AA shown in FIGS. It shows that it is a vertical section.

  In the valve plate device 20 of the compressor configured as described above, when the suction valve 26 is closed, the gas introduction path 32 and the communication hole 31 are connected to the valve-side surface of the suction valve 26. Thus, a gas having a pressure higher than the pressure of the suction gas in the suction chamber (discharge gas in the present embodiment) can be introduced, and the introduced gas is filled with a gas formed between the valve plate 25 and the suction valve 26. The gas filling chamber 30 including the recess 36 is filled. In the suction stroke of the piston 3 (expansion stroke of the gas in the cylinder bore 4), the pressure in the cylinder bore 4 is reduced, so that the gas filled in the gas filling chamber 30 has a pressure higher than the pressure of the suction gas in the suction chamber. A differential pressure is generated between the cylinder bore 4 and the internal pressure of the cylinder bore 4, and a force in the direction of pushing up the suction valve 26 (in the direction of opening the valve) is generated by the pressure difference. Since the force in the valve opening direction is applied, the suction valve 26 can be opened quickly and smoothly even if there is sticking by the lubricating oil. In addition, since it is not necessary for the piston 3 to perform extra work, the power consumption of the compressor is reduced. In addition, since the suction valve 26 opens quickly and smoothly, noise and vibration that may have occurred due to the suction valve 26 striking the recess 37 are reduced.

  At least a portion of the gas introduction path 32 (in the above embodiment, the passage portion 33) for introducing a gas having a pressure higher than the suction gas pressure in the suction chamber into the communication hole 31 is provided in the discharge valve 27 made of a relatively thin plate member. Since it is formed, for example, when it is formed by a press, the burden on the press machine is reduced, and the formation of the gas introduction path 32 is facilitated. Therefore, it is possible to reduce the manufacturing cost when mass-produced. Further, since at least a part of the gas introduction path 32 is formed in the discharge valve 27 made of an easily formed thin plate member, the degree of freedom in handling the gas introduction path 32 is improved, for example, bent or curved. It becomes possible to extend, and it becomes possible to develop a forced valve opening structure for stabilizing the operation of the suction valve 26 for various models. Further, when at least a part (passage portion 33) of the gas introduction path 32 is formed in the discharge valve 27, the remaining portions (passage portions 34 and 35) of the gas introduction path 32 are formed in the valve plate 25. However, the path length of the gas introduction path 32 to be formed in the valve plate 25 can be greatly reduced, and the blow-through durability of the valve plate 25 can be improved.

  Further, a part (passage portion 33) of the gas introduction path 32 formed in the discharge valve 27 is simply sealed by a member (in the above embodiment, the retainer-integrated gasket 29) disposed on the surface facing the discharge valve 27. Since the sealing performance can be exerted by the gasket 29, a gas having a pressure higher than the pressure of the suction gas in the suction chamber guided to the valve-closing surface of the suction valve 26 via the gas introduction path 32 can be obtained. The suction valve 26 is efficiently introduced into the valve closing side of the suction valve 26 while maintaining a desired pressure. This gas pressure ensures a quick and smooth opening operation of the intake valve 26 more reliably.

  10 and 11 show perspective plan views of the compressor valve plate device according to the second embodiment of the present invention in the state where the discharge valve is installed. In this embodiment, as compared with the first embodiment described above, at least a part of the gas introduction path 51 has a portion corresponding to at least a part of the partition wall 52 between the discharge chamber 23 and the suction chamber 21 in the cylinder head. At least a part of the gas introduction path 51 is accommodated in a position within the range where the cylinder head partition wall 52 is located. The width of the passage portion of the gas introduction path 51 that is stored in a position within the range where the partition wall 52 is located is set to be smaller than the width of the partition wall 52. Since the cylinder head partition 52 has a high surface pressure at a portion that is fixed by fastening or the like, the surface pressure of the partition can be effectively used to improve the sealing performance of the gas introduction path 51 at that portion. In addition, although illustration is abbreviate | omitted, depending on a model, it can also be set as the structure which at least one part of the gas introduction path | route formed in the discharge valve passes through the site | part corresponding to at least one part of the outer peripheral wall 53 of a cylinder head. In the same manner as described above, the surface pressure of the outer peripheral wall 53 of the cylinder head can be effectively used to improve the sealing performance of the gas introduction path at that portion. Since other configurations and operational effects are the same as those of the first embodiment, description thereof will be omitted by assigning the same reference numerals as those in the first embodiment to FIGS. 10 and 11.

  FIG. 12 shows a longitudinal section of a gas introduction path forming portion in the valve plate device for a compressor according to the third embodiment of the present invention. In this embodiment, a bead 62 is formed on the gasket 61, and the gas introduction path passage portion 63 is formed by using the bead 62 in cooperation with the gas introduction path passage portion 33 formed on the discharge valve 27. ing. Since such a bead 62 has a high local surface pressure, it is possible to improve the sealing performance accordingly. The seal width of the seal portion of the gas introduction path including such a bead 62 configuration is preferably set to 0.2 mm or more as described above. Such a bead structure can also be used to form at least a portion of the gas introduction path itself. In addition to the gasket 61, for example, a bead 65 is formed on the lower surface of the cylinder head partition wall 64 as shown in FIG. In addition, it is possible to locally increase the surface pressure of the gasket 66 by using the local surface pressure, and to improve the sealing performance of the gas introduction path passage portion 33 formed in the discharge valve 27. Further, as shown in FIG. 14, the beads as described above are not only for the gas introduction path 67, but particularly by providing beads 69 around the communication holes 68, It is possible to effectively improve the sealing performance for the entire path.

  Regarding the sealing performance, for example, as shown in FIG. 15, when the surface pressure of the gasket 71 is low with respect to the peripheral portion of the gas introduction path passage portion 33 formed in the discharge valve 27, as indicated by an arrow in the figure. There is a possibility that gas leakage 72 from the gas introduction path passage portion 33 may occur. In such a case, as a configuration other than the above-described bead, for example, as shown in FIG. 16, the gas introduction path passage portion 33 in the valve plate device of the compressor according to the fourth embodiment of the present invention includes a gas introduction path passage portion 33. By interposing a sealing material 73 in which a polymer material is used at least in part between the formed discharge valve 27 and the gasket 71, it is possible to improve the sealing performance with respect to the gas introduction path passage portion 33. Although not shown in the figure, this part can be joined with a polymer material having adhesiveness.

  The valve plate device for a compressor according to the present invention is basically applicable to any compressor, and is particularly used for a vehicle air conditioner that requires stable operation for an intake valve and that is desired to suppress noise and vibration. It is suitable for a compressor or the like.

It is a longitudinal section of a swash plate type variable capacity compressor showing an example of a compressor to which a valve plate device concerning the present invention is applicable. It is a partial longitudinal cross-sectional view of the valve plate apparatus of the compressor which concerns on 1st embodiment of this invention. FIG. 3 is a longitudinal sectional view of the valve plate device of FIG. 2 with a gasket removed. It is a top view of the valve plate of the valve plate apparatus of FIG. FIG. 5 is a perspective plan view showing a state in which a discharge valve is provided on the valve plate of FIG. 4. FIG. 6 is an enlarged partial plan view of the apparatus of FIG. It is a top view which shows the state which provided the gasket on the discharge valve of FIG. FIG. 8 is a perspective plan view of the apparatus of FIG. 7. FIG. 9 is an enlarged partial plan view of the apparatus of FIG. It is a perspective top view which shows the discharge valve installation state in the valve plate apparatus of the compressor which concerns on the 2nd embodiment of this invention. FIG. 11 is an enlarged partial plan view of the apparatus of FIG. 10. It is a longitudinal cross-sectional view of the gas introduction path | route formation part in the valve plate apparatus of the compressor which concerns on the 3rd embodiment of this invention. It is a longitudinal cross-sectional view of the gas introduction path | route formation part using the bead which concerns on an embodiment different from FIG. It is a schematic plan view of the gas introduction path | route formation part using the bead concerning another embodiment. It is a longitudinal cross-sectional view of the gas introduction path | route formation part which illustrates the gas leak from a gas introduction path | route. It is a longitudinal cross-sectional view of the gas introduction path | route formation part in the valve plate apparatus of the compressor which concerns on the 4th embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compressor 2 Cylinder head 3 Piston 4 Cylinder bore 5 Cylinder block 6 Front housing 7 Crank chamber 9 Drive shaft 12 Swash plate 13 Shoe 20 Valve plate device 21 Suction chamber 22 Suction hole 23 Discharge chamber 24 Discharge hole 25 Valve plate 26 Suction valve 27 Discharge valve 28 Retainer part 29 Retainer integrated gasket 30 Gas filling chamber 31 Communication hole 32 Gas introduction path 33 Gas introduction path passage part 34, 35 formed in the discharge valve Gas introduction path passage part 36 formed in the valve plate Gas filling Recess 37 Recess 41 Rivet hole or bolt hole 51 Gas introduction path 52 Cylinder head partition wall 53 Cylinder head outer peripheral wall 61 Gasket 62 Bead 63 Gas introduction path passage portion 64 Cylinder head partition wall 65 Bead 66 Gasket 67 Gas introduction path 68 Communication hole 69 Bead 71 Gasket 72 Sealing material scan leakage 73 polymer material has been used

Claims (20)

A valve plate device for a compressor interposed between a cylinder head having a suction chamber and a discharge chamber and a cylinder block having a cylinder bore into which a piston is reciprocally inserted. The valve plate device communicates with the suction chamber and the cylinder bore. And a valve plate having a discharge hole communicating with the cylinder bore and the discharge chamber, a suction valve disposed on a surface of the valve plate facing the cylinder block, and opening and closing the suction hole, In the valve plate device of the compressor having a discharge valve disposed on a surface of the valve plate facing the cylinder head and opening and closing the discharge hole,
The valve plate constitutes at least a part of a gas filling chamber capable of introducing and filling a gas having a pressure higher than the suction gas pressure in the suction chamber between the valve plate and the suction valve, and the suction valve A communication hole that communicates with the valve-closing surface of the valve, and at least a part of a gas introduction path for introducing a gas having a pressure higher than the suction gas pressure in the suction chamber into the communication hole is formed in the discharge valve. A valve plate device for a compressor, wherein a part of a gas introduction path formed in the discharge valve is sealed by a member disposed on a surface facing the discharge valve.   2. The compressor according to claim 1, wherein at least a part of a gas introduction path formed in the discharge valve passes through a portion corresponding to at least a part of a partition wall between the discharge chamber and the suction chamber in the cylinder head. Valve plate device.   The valve plate device for a compressor according to claim 1 or 2, wherein at least a portion of the gas introduction path formed in the discharge valve passes through a portion corresponding to at least a portion of the outer peripheral wall of the cylinder head.   A bead that seals at least a part of a gas introduction path formed in the discharge valve or a part including the peripheral part of the communication hole is formed on at least a part of a member disposed on a surface facing the discharge valve. The valve plate apparatus for a compressor according to any one of claims 1 to 3.   The compression according to any one of claims 1 to 4, wherein at least a part of at least one of the opposed surfaces of the discharge valve and a member opposed to the discharge valve is formed of a polymer material. Valve plate device of the machine.   The valve plate device for a compressor according to any one of claims 1 to 5, wherein at least a part of a gas introduction path formed in the discharge valve is formed by punching.   The valve plate device for a compressor according to any one of claims 1 to 6, wherein at least a part of a gas introduction path formed in the discharge valve is formed by bead processing.   The sealing material in which at least a part of a polymer material is used is sandwiched between at least a part between the discharge valve and a member disposed on a surface facing the discharge valve. Compressor valve plate device.   The compressor according to any one of claims 1 to 8, wherein at least a part between the discharge valve and a member disposed on a surface facing the discharge valve is joined to each other by an adhesive polymer material. Valve plate device.   The valve plate device for a compressor according to any one of claims 1 to 9, wherein at least one of the discharge valve and the valve plate is coupled by a rivet or a bolt.   The valve plate apparatus of the compressor in any one of Claims 1-10 with which the seal width of the seal part with respect to at least one part of the gas introduction path | route formed in the said discharge valve is set to 0.2 mm or more.   The valve plate device for a compressor according to any one of claims 1 to 11, wherein at least a part of a portion of the discharge valve located in the discharge chamber is supported by the cylinder head.   The valve plate device for a compressor according to any one of claims 1 to 12, wherein barrel polishing is applied to at least a part of a gas introduction path formed in the discharge valve.   The valve plate device for a compressor according to any one of claims 1 to 13, wherein a width of a gas introduction path formed in the discharge valve is partially changed. Gas at least a portion of the discharge valve which is formed on the gas introducing path, and through a portion corresponding to at least a portion of the partition wall between the discharge chamber and the suction chamber in the cylinder head, formed in the discharge valve The valve plate device for a compressor according to any one of claims 1 to 14, wherein a width of at least a part of the introduction path is smaller than a width of a partition wall between a discharge chamber and a suction chamber of the cylinder head.   The valve plate device for a compressor according to any one of claims 1 to 15, wherein a gas introduction path formed in the discharge valve extends while being bent or curved in the middle.   The valve plate apparatus of the compressor in any one of Claims 1-16 in which the said gas introduction path | route is formed in order of the valve plate-discharge valve-valve plate.   The valve plate apparatus of the compressor in any one of Claims 1-16 in which the said gas introduction path | route is formed in order of the valve plate-discharge valve.   The valve plate device for a compressor according to any one of claims 1 to 18, wherein a path for introducing gas including the communication hole is formed by a discharge valve and a valve plate.   The valve plate apparatus of the compressor in any one of Claims 1-19 which consists of what the said compressor uses for a vehicle air conditioner.

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