WO2004106740A1

WO2004106740A1 - Port structure of valve plate for use in compressor

Info

Publication number: WO2004106740A1
Application number: PCT/JP2003/014563
Authority: WO
Inventors: Katsutaka Une
Original assignee: Zexel Valeo Climate Control Corporation
Priority date: 2003-05-27
Filing date: 2003-11-17
Publication date: 2004-12-09
Also published as: JP2006226113A

Abstract

A port structure of a valve plate for use in a compressor comprising a valve plate provided with a suction port (35) and a delivery port (36), a suction valve having a rolling part being deformed to open the suction port in the suction process and being deformed to close the suction port in the delivery process, and a delivery valve having a rolling part being deformed to open the delivery port in the compression process and being deformed to close the delivery port in the suction process, wherein at least one of the suction port (35) and the delivery port (36) is provided with means (50, 55) for supporting the rolling part of the suction valve or the delivery valve on the side in the closing direction and the faces (53, 58) of the supporting means abutting against the rolling part are discontinuous to the edge at the opening of the suction port (35) or the delivery port (36). Deflection of the suction valve to the suction chamber side during compression process and deflection of the delivery valve to the compression chamber side during suction process can thereby be prevented surely and a suction efficiency or a delivery efficiency can be enhanced greatly.

Description

Port structure of valve plate used in compressor

The present invention relates to a port structure of a valve plate that is a component of a compressor used as a component of a refrigeration cycle.

Itoda 1

Background art

As shown in FIG. 7, a compressor for compressing a fluid such as a refrigerant includes a valve plate between a suction chamber 100 into which a low-pressure fluid flows from outside and a compression chamber 101 for compressing the fluid. 102, suction valve 103 and discharge valve 110 are arranged. The suction valve 103 swings according to the pressure difference between the suction chamber 100 and the compression chamber 101 to open and close the suction port 104 formed in the valve plate 102. The oscillating portion 105 is provided, and the oscillating portion 105 is opened by being elastically deformed (see a two-dot chain line 106) toward the compression chamber 101 in the B-introduction process, The observation fluid in the suction chamber 100 is allowed to flow into the compression chamber 101, and is closed by abutting on the valve plate 102 in the compression process, so that the high-pressure fluid in the compression chamber 101 is closed. Prevent backflow into the suction chamber 100. In this compression step, since a large pressure difference is generated between the compression chamber 101 and the suction chamber 100, the oscillating portion 105 closing the suction port 104 includes the suction chamber 1 A pressure of 108 is applied so that it is deflected to the 0 side (see the two-dot chain line 107). If the deflection of the oscillating portion 105 caused by the pressure 108 becomes large, the fluid leaks from the contact portion with the port 104 and the performance of the pressure β decreases. When the pressure exceeds the limit of the durability (pressure resistance) of the oscillating portion 105, the oscillating portion 105 is broken or plastically deformed. Factors that determine the durability when the swing portion 105 is closed include the wall thickness of the swing portion 105 and the opening area of the port 104. Increasing the thickness of the oscillating portion 105 increases durability, but on the other hand, Since the operability (responsiveness) at the time of shifting to the suction process is reduced, the suction efficiency is reduced and the performance of the compressor is reduced. Further, if the opening area of the port 104 is reduced, the allowable deflection of the oscillating portion 105 is inevitably reduced, so that its durability is improved, but the suction efficiency is reduced. Therefore, in order to improve the performance of the compressor, the key point is how to increase the opening area of the port 104 while maintaining the operability of the swing part 105. Also, with respect to the discharge valve 110, the oscillating portion 1 12 moves toward the compression chamber 101 as shown by a two-dot chain line 1 13 due to the pressure difference between the compression chamber 101 and the discharge chamber 111. Since a bending phenomenon occurs, improvement is required similarly to the above-described suction valve 103. As a conventional invention aimed at reducing the deflection of the valve in the port portion of the valve plate as described above, a ΐΜλ port between the compression chamber and the suction chamber for communicating the compression chamber and the suction chamber is provided. A compressor comprising: a perforated valve plate; and a suction valve having a 耑 portion fixed to the valve plate and a front end portion openably and closably abutted against an opening of the suction port. A predetermined portion of the valve plate is provided with a suction valve supporting portion (rib) for supporting the suction valve when the suction valve is opened and closed, and the knitting of the suction port is performed within a range facing the suction valve. There is a method of enlarging the side (see Japanese Patent Application Laid-Open No. 8-284449). As a result, the curvature of the suction valve toward the suction chamber can be suppressed by using the ribs during compression, and the suction amount of the refrigerant gas can be increased by opening the suction port. It is shown.

However, in the conventional invention, the rib as the suction valve support is formed continuously with the enlarged surface and the enlarged wall of the valve plate (the edge of the suction port) (Japanese Patent Application Laid-Open No. 8-2-2). No. 84449: see paragraphs 0 19 and 0 25), the portion where the suction valve and the rib come into contact is located away from the center of the suction port. Since the amount of deflection of the suction valve is greater near the center of the suction port, the above-described vertical structure is not efficient in suppressing deflection. Therefore, in order to sufficiently improve the pressure resistance of the suction valve, it is necessary to form the rib so as to protrude largely toward the center, and it is difficult to greatly increase the opening area of B and the inlet port. It seems to be. In view of the above, the present invention makes it possible to reliably suppress the deflection of the suction valve toward the suction chamber during the compression process and the deflection of the discharge valve toward the compression chamber during the suction process, and to reduce the suction efficiency or the discharge efficiency. It is an object of the present invention to significantly improve it. Disclosure of the invention

The present invention addresses the above problems, and includes a cylinder block in which a compression chamber is defined, a cylinder head in which a suction chamber and a discharge chamber are defined, a cylinder block, and a head to a knitting cylinder. A valve plate provided with a suction port for communicating the suction chamber and the knitting 3 compression chamber and a discharge port for communicating the compression chamber with the knitting 3 discharge chamber; and a knitting 3 valve plate. A oscillating portion that is arranged between the cylinder block and that oscillates according to the pressure difference between the self-inhalation chamber and the compression chamber, so that the oscillating portion opens the suction port in the suction process. And a compression valve and the discharge chamber are disposed between a knitting 3 valve plate and a knitting 3 cylinder head, and a suction valve that is deformed so as to close the suction port 3 in the discharge step. Equipped with a swinging part that swings according to the pressure difference of The compressor is configured to include a discharge valve that deforms to open the discharge port and that deforms to a position that closes the discharge port 113 in the suction operation. A port structure of a valve plate, wherein at least one of the suction port and the discharge port is provided with a support means for supporting a surface of the swing portion of the suction valve or the knitting 3 discharge valve on the closing direction side. The contact surface between the rocking support means and the rocking portion is discontinuous with the edge of the opening of the suction port or the discharge port (claim 1). .

According to this, at the time of the compression process in the suction valve and at the time of the suction process in the discharge valve, each swinging portion in the closed position is supported by the support means provided at each port formed in the valve plate. Therefore, it is possible to suppress the deflection of these swinging portions. In addition, the contact surface of the support means is provided in a position that is not in contact with the edge of the opening of each port, that is, in the vicinity of the center of the opening, so that the portion where the swinging portion has a large deflection is supported. This It is more efficient than supporting at the edge of the port. As a result, leakage of fluid from the port can be reliably prevented, and the pressure resistance of the oscillating portion is improved, so that the opening area of the port can be increased and the structure of the oscillating portion can be reduced. Since the thickness of the material can be reduced, the suction efficiency or the discharge efficiency, and in turn, the pressure performance can be improved.

Further, the knitting support means includes a flange portion having an edge connected to an edge of an opening of the suction port or the discharge port, and a protrusion formed on the flange portion and protruding toward the oscillating portion. Or a cantilevered beam in which one end is connected to one end of the opening of the suction port and the discharge port, and a knitting 3 swing formed on the beam. (Claim 3). Thus, the contact surface of the knitting 3 can be positioned near the center of the port where the deflection of the swinging portion is the largest without being continuous with the edge of the port. In addition, if the connecting portion of the ridge portion and the beam portion is provided in a direction perpendicular to the swing direction of the swing portion, the suction resistance of the portion having the maximum swing width can be suppressed.

Further, the height of the knitting 3 contact surface may be lower than the edge of the opening of the third suction port or the discharge port (claim 4).

According to this, for example, the oscillating portion of the suction valve comes into contact with the contact surface in a state where the oscillating portion is deflected by a predetermined amount during the compression process, and the contact surface and the oscillating portion are formed by two flat plates. It will be in the adsorption state as if it were superimposed. Thus, when the swinging portion shifts to the suction process, the deflection and the suction state of the compression temple cause the opening portion to be vigorously opened with a repulsive force like a leaf spring. As a result, the operability of the swing portion is improved, so that the suction efficiency or the discharge efficiency is improved, and the pressure performance can be improved. It is needless to mention that the height difference between the contact surface and the port edge is equal to or less than the limit of the deflection of the oscillating portion, but as a result of the investigation and research by the inventors, the plate thickness of the suction valve was reduced. When it is 0.305 mm, it is preferably in the range of 0.005 to 0.10 mm.

In addition, the contact surface may be substantially the same height as the edge of the opening of the knitting 3 suction port or the knitting 3 discharge port, and may be subjected to non-adhesive processing (claim 5).

If the contact surface is at the same height as the port edge, use the repulsive force of the sliding part Therefore, it is necessary to prevent the contact between the contact surface and the swinging part. As a result, the releasability of the two is improved, so that the operability of the swing portion can be improved.

The knitting 3 non-adhesive processing is desirably a rough surface processing by a sandplast method, a stamping method, or the like (claim 6), and the I ^ contact surface may be formed of a resin (claim) Item 7). BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a sectional view showing the structure of a compressor according to the present invention. FIG. 2 is a partially enlarged cross-sectional view showing a structure of a main part of the compressor according to the present invention. FIG. 3 (a) is a perspective view showing a structure of the suction port and the discharge port of the compressor according to the present invention as viewed from the compression chamber side, and FIG. 3 (b) is a compressor according to the present invention. FIG. 2 is a perspective view showing a structure of a discharge port of the machine as viewed from a discharge chamber side. FIG. 4 is a diagram showing the structure of the support means in the first embodiment. FIG. 5 is a diagram showing the structure of the support means in the second embodiment. FIG. 6 (a) is a diagram showing the structure of the support means in the third embodiment, and FIG. 6 (b) is a diagram showing the structure of the support means in the fourth embodiment. FIG. 6 (c) is a diagram showing the structure of the support means in the fifth embodiment. FIG. 7 (a) is a plan view showing the structure of the evil means in the sixth mode, and FIG. 7 (b) is a sectional view of FIG. 7 (a). FIG. 8 is a diagram showing a state of a port portion of a conventional compressor.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. A pressure 1 according to the present embodiment shown in FIG. 1 is used in a refrigeration cycle using a refrigerant as a working fluid, and includes a cylinder block 2, a front cylinder head (hereinafter, a front head) 3, a rear cylinder head. (Hereinafter referred to as "rear head") 4, valve plate 5, suction valve 6, discharge valve 7, gasket 8, 9,, driving mechanism 10, swash plate machine groove 11, piston 12, etc. Is Things.

A front head 3 and a rear head 4 are fixed to both ends of the cylinder work 2 with bolts or the like, and a gasket 8 is provided between the cylinder work 2 and the lead head 4 in order from the cylinder block 2 side. The suction valve 6, valve plate 5, discharge valve 7, and gasket 9 are sandwiched.

The drive shaft 10 is driven by an engine or motor or the like via a pulley 13 and is rotatable by bearings 14 and 15 provided on a front head 3 and a cylinder block 2. Supported. A plurality of bores 16 are formed in the cylinder block 2 at equal intervals around the circumference of the drive shaft 10, and a piston 12 is slidable in each bore 16. Are located. These pistons 12 are connected to a swash plate leak 11 consisting of a hinge ball 17, a skew 18, an angle adjusting leak 19, a shroud 20, etc., and are discharged by a predetermined control unit. Reciprocates while adjusting the volume. As a result, a compression chamber 21 whose volume is changed by the movement of the piston 12 is defined in the bore 16.

As shown in FIG. 1 and FIG. 2, a suction chamber 30 and a discharge chamber 31 are defined in the rear head 4. The suction chamber 30 is defined on the center side of the rear head 4 by the partition wall 32, into which a refrigerant from a low-pressure line of the refrigeration cycle is guided by a predetermined channel. The discharge chamber 31 is defined outside the suction chamber 30 by the partition wall 32 and the outer wall 33, and communicates with a high-pressure line of the refrigeration cycle through a predetermined passage. The valve plate 5 is provided with a suction port 35 communicating the access chamber 30 and the compression chamber 21 and a discharge port 36 communicating the compression chamber 21 and the discharge chamber 31. Drilled corresponding to 6. The gaskets 8 and 9 are also provided with communication holes at positions corresponding to the knitting self-inhalation port 35 and the discharge port 36.

As shown in FIG. 2, the suction valve 6 has a rocking portion 40 at a position corresponding to each of the suction ports 35 of the knitting machine. In the compression step, the suction port 35 is opened by swinging downward until the end thereof abuts against the valve holding portion 41 formed at the opening end of the bore 16. Close suction port 35. In addition, the discharge valve 7 has a swing part 43 at a position corresponding to each of the discharge ports 36. In the compression process, the swing portion 43 swings upward until it comes into contact with a retainer 44 formed integrally with the gasket 9 to open the discharge port 36, and simultaneously performs a suction process. In, the discharge port 36 is closed by contacting the valve plate 5.

The suction port 35 and the discharge port 36 according to the present invention are provided with support means 50, 55 as shown in FIGS. These support means 50 and 55 support the suction valve 6 or the discharge valve 7 in the closed state, and are composed of bridge portions 51 and 56 and projecting portions 52 and 57, respectively. Have been.

Fig. 3 (a) shows the suction port 35 and the discharge port 36 drilled in the valve plate 5 as viewed from the compression chamber 21 side. Fig. 3 (b) shows the discharge port 36 This shows the state as viewed from the discharge chamber 31 side. The bridge portions 51 and 56 are connected to the edges of the suction port 35 or the discharge port 36, and the protruding portions 52 and 57 are formed in the middle of the bridge portions 51 and 56. ing. The protruding portion 52 provided on the suction port 35 protrudes toward the suction valve 6, and contacts the surface of the swinging portion 40 of the suction valve 6, which is in close contact with the airtight surface 54, on the suction chamber 30 side. It has an abutment surface 53 for abutting. The projecting portion 57 provided on the discharge port 36 projects toward the discharge valve 7, and is in contact with the surface of the swing portion 43 of the discharge valve 7, which is in close contact with the airtight surface 59, on the discharge chamber 31 side. It has an abutment surface 58 for abutment.

The contact surfaces 53, 58 are formed discontinuously with the edge of the suction port 35 or the discharge port 36, and these contact surfaces 53, 58 are formed in the suction port 35 or the discharge port 35. It is located near the center of port 36. As a result, the knitting 3 abutment surfaces 53, 58 can be brought into contact with the portions where the amount of deflection is greatest when the swinging portions 40, 43 are closed, so that the swinging portions 40, 43 Deflection can be suppressed efficiently. As a result, the durability (pressure resistance) of the oscillating portions 40 and 43 can be improved, so that the opening areas of the ports 35 and 36 can be increased, and the oscillating portions 40 and 43 can be enlarged. Since the operability can be improved by reducing the thickness of the constituent materials of (4) and (4), the suction efficiency or the discharge efficiency, and in turn, the performance of pressure 1 can be improved.

FIG. 4 shows the structure of the support means 50 provided in the suction port 35 in the first embodiment. The projecting portion 52 of the support means 50 has a contact surface 5 3 Is lower by a predetermined amount d than the edge 49 of the suction port 35 on the compression chamber 21 side. Has been established. The predetermined amount d is preferably set within a range of 0.05 mm <d <0.10 mm when the thickness of the suction valve 6 is 0.305 mm. As a result, the oscillating portion 40 of the suction valve 6 is bent toward the suction chamber 30 by a predetermined amount during the compression process, and comes into contact with the contact surface 53 of the projection 3 52. At this time, the oscillating portion 40 and the contact surface 53 are in an adsorbed state as if two flat plates were superimposed on each other. Accordingly, the swinging portion 40 exhibits an action accompanied by a repulsive force like a leaf spring, and moves toward the open state at a speed faster than usual. As a result, the operability of the oscillating portion 40, that is, the transition to the valve-open state is quickened, so that the suction efficiency is improved and the performance of the compressor 1 is improved. In the discharge valve 7, the same operation and effect as those of the above-described suction valve 6 can be obtained, and the discharge efficiency can be improved, and the performance of the compressor 1 can be improved.

FIG. 5 shows the structure of the support means 70 provided on the suction port 35 in the second embodiment, and the projecting portion 72 of the support means 70 has a contact surface. The height of 7 3 is almost the same as the edge 49 of the suction port 35 on the side of the compression chamber 21, and the non-adhesive surface 73 abuts the swinging part 40. It has a processing part 74. If the height of the three edges 49 of the knitting and the height of the contact surface 73 are the same as in this configuration, it is not possible to expect the repulsive action of the swinging portion 40, and therefore, both sides 40, Preventing the adsorbing action between 73 and improving the releasability of both 40 and 73 leads to improving the operability of the oscillating section 40. In the knitting 3 non-adhesive processing part 74, the contact surface 73 is roughened by sand blasting, stubbing, etc., or the contact surface 73 is formed of a material such as resin. Is listed as a ^ (column.

In addition, in the above-described difficult embodiment, the suction port 35 has a square shape, but the present invention is not limited to this. In the third form shown in FIG. 6 (a), the suction port 35a or the discharge port 36a is made circular, and the support means 75 is provided with two bridge portions 7a. 6a and 76b and a projection 77 formed at the intersection thereof. According to such an embodiment, the same advantageous effects as in the above-described embodiment can be obtained. Further, a fourth difficulty mode shown in FIG. 6 (b) is that the suction port 35b or the discharge port 36b has a rectangular shape, and the supporting means 80 is provided on a diagonal line of the square. And a projection portion 82 formed substantially at the center of the bridge portion 81. According to such an embodiment, good results and effects can be obtained as in the above-described embodiment. A fifth difficulty mode shown in FIG. 6 (c) is that the suction port 35c or the discharge port 36c has a pentagonal shape, and the support means 85 is provided on a symmetrical line of the pentagon. The bridge 86 includes a projection 86 formed substantially at the center of the bridge 86. According to such an embodiment, the same advantageous effects as in the above-described embodiment can be obtained. Further, the support means 90 according to the sixth difficulty mode shown in FIGS. 7 (a) and 7 (b) has a beam portion 91 and a projecting portion 92. The flB beam 91 has a cantilever structure in which one end is connected to the edge of the opening of the suction port 35 d or the discharge port 36 d, and the other end of the beam 91. A protruding portion 92 is formed in the portion. As a result, the opening areas of the ports 35d and 36d are increased, so that the same effects as those of the above-described embodiment can be obtained, and the B or discharge resistance can be reduced. Industrial applicability

As described above, according to the present invention, the support means for supporting the suction valve or the discharge valve at the time of closing is provided at a position discontinuous with the edge of the suction port or the discharge port. In the position where the valve deflection is large, the deflection can be suppressed efficiently, so that the opening area of the port can be enlarged and the suction valve or the discharge valve can be made thinner, so that the suction efficiency or the discharge efficiency can be improved. And the performance of the compressor can be improved.

Claims

The scope of the claims

1. A cylinder block in which a compression chamber is defined, a cylinder head in which a suction chamber and a discharge chamber are defined, and a knitting cylinder which is arranged between a cylinder block port and the cylinder head. A valve plate provided with a suction port for communication between the compression chamber and the self-compression chamber, and a discharge port for communication between the self-compression chamber and the self-discharge chamber; and a valve plate and the rts cylinder block. A oscillating portion that is oscillated in accordance with a pressure difference between the suction chamber and the knitting / shrinking chamber. The oscillating portion is deformed so as to open the suction port in the suction process and is discharged in the suction process. A suction valve that deforms so that the suction port closes the suction port; a pressure difference between the compression chamber and the discharge chamber disposed between the valve plate and the cylinder head; A swinging portion that swings according to the pressure, and the swinging portion opens the discharge port in the compression process.該摇 moving parts in the suction stroke as well as deformation shall apply in the port structure of the valve plate for use in a compressor configured to include a discharge valve which is deformed in a position closing the ¾ Symbol discharge port,

At least one of the suction port and the discharge port is provided with support means for holding a surface of the swinging portion of the suction valve or the discharge valve on the closing direction side,

A port structure of a valve plate used in a compressor, wherein a contact surface of the support means with the knitting 3 moving portion is not in contact with an edge of an opening of the knitting suction port or the discharge port. Build.

2. The support means includes a page portion having both ends connected to an edge of an opening of the suction port or the knitting 3 discharge port, and a protruding portion formed on the if3 page portion and protruding toward the oscillating portion. The port structure of a valve plate used for pressure according to claim 1, characterized by comprising:

3. The supporting means includes: a cantilevered beam portion having one end connected to the end of the opening of the suction port and the ltt exit port; and the swinging portion side formed on the beam. 2. A valve plate used for pressure according to claim 1, wherein the —G structure.

4. The compressor according to any one of claims 1 to 3, wherein the height of the basket 3 contact surface is lower than the edge of the opening of the knitting self-suction port or the knitting self-discharge port. Valve plate port structure used for

5. The contact surface has substantially the same height as the edge of the opening of the suction port or the discharge port, and has a non-adhesive finish. The port structure of the valve plate used for the compression according to any one of the above.

6. The port structure of the valve plate used for pressure according to claim 5, wherein the non-adhesive processing is a rough surface processing.

7. The port structure of a valve plate used for compression according to claim 6, wherein in the knitting 3 non-adhesive processing, the knitting self-contact surface is formed of a resin. .