KR20080106988A - Compressor - Google Patents

Abstract

A compressor having a cylinder bore where fluid is compressed, a valve plate for partitioning the cylinder bore and a suction chamber, a suction hole provided in the valve plate and interconnecting the cylinder bore and the suction chamber, and a suction reed valve for opening and closing the suction hole and caused, when the valve closes the suction hole, to be in contact with a suction reed valve seal section of the valve plate. The suction reed valve seal section is located outside a suction hole-provided region. A suction reed valve support section, with which the suction reed valve can be in contact when the suction reed valve is closed, is provided also in the suction hole-provided region of the valve plate, and a valve function is provided between the outer periphery of the suction reed valve contact section of the suction reed valve support section and the suction reed valve. A through hole is provided in a portion inside the portion where the valve function of the reef valve is provided. In the compressor, pressure loss at a suction valve portion in a suction stroke is reduced to improve suction efficiency etc. and vibration of the reed valve is suppressed by the reduction in pressure loss. ® KIPO & WIPO 2009

Description

Compressor {COMPRESSOR}

The present invention relates to, for example, a piston reciprocating compressor in which a piston is reciprocally installed in a cylinder bore, and particularly relates to a compressor suitable as a compressor of a vehicle air conditioner.

BACKGROUND ART As a compressor of a vehicle air conditioner, a plurality of cylinder bores are formed in a cylinder block, and a piston reciprocating compressor is provided in which a piston is reciprocated in each cylinder bore. In such a compressor, a suction chamber and a discharge chamber are formed inside the cylinder head. In the suction stroke, the suction hole is opened by pushing the gas refrigerant through the suction lead valve provided on the valve plate to open the suction hole. Gas refrigerant is sucked into the cylinder bore. On the other hand, in the compression stroke, the suction lead valve is closed and the discharge valve is pushed open. The compressed gas refrigerant is discharged from the cylinder bore into the discharge chamber.

In the above suction stroke, the internal pressure of the cylinder bore is lower than the internal pressure of the suction chamber, and when the internal pressure difference occurs, the suction lead valve is pushed into the cylinder bore to open. There exists a possibility that efficiency (insulation compression efficiency or volume efficiency) may fall. In order to improve such a pressure loss, it is effective to increase the suction hole and increase the opening area when the suction hole is opened. If the suction hole is large, the internal pressure of the cylinder bore is momentarily increased during liquid compression. If it rises to, the suction lead valve cannot withstand the pressure and may be deformed or broken. When the suction lead valve is deformed, a predetermined valve closing operation is not performed, and there is a fear that the compression efficiency is lowered due to the deterioration of the sealing property. On the other hand, in a suction stroke, a suction lead valve vibrates by the flow resistance of a suction valve part, and may generate a pressure pulsation.

In addition, in order to facilitate the valve opening operation of the suction lead valve, a recess having a width narrower than that of the arm part is formed in the region of the valve plate where the arm part of the suction lead valve abuts, thereby lubricating oil adhesive force which causes the delay of the valve opening operation. While reducing the pressure, the pressure area of the suction lead valve due to the differential pressure between the cylinder bore pressure and the suction chamber internal pressure is increased to facilitate the valve opening operation (Patent Document 1). The suction lead valve is deformed due to an increase in the cylinder bore internal pressure due to the compression operation, which may deteriorate the sealing property between the suction valve and the valve plate, resulting in a decrease in efficiency.

[Patent Publication 1] Japanese Utility Model Publication H5 (1993) -89876

An object of the present invention is to provide a compressor capable of preventing deformation of the suction valve in the suction stroke, improving suction efficiency, etc., and suppressing occurrence of vibration of the suction lead valve by reducing pressure loss.

In order to solve the above problems, the compressor according to the present invention, the cylinder bore in which the fluid is compressed, the valve plate for partitioning the cylinder bore and the suction chamber, and the valve plate is formed in the communication between the cylinder bore and the suction chamber A compressor having a suction hole and a suction lead valve which opens and closes the suction hole and contacts the suction lead valve seal portion of the valve plate positioned outside the suction hole installation region when the suction hole is closed. Also within the area, a suction lead valve support portion that can be in contact with the suction lead valve when the suction lead valve is closed is provided, and a valve function is provided between the suction lead valve contact portion and the outer circumferential portion of the suction lead valve support portion. And a through hole is formed in the inner portion of the portion to which the valve function of the suction lead valve is applied. The lure is. In this configuration, since the suction lead valve support portion is provided in the suction hole installation area to allow the suction lead valve to contact when the suction lead valve is closed, the internal pressure of the cylinder bore increases during compression, and the suction lead valve closes to close the valve. In the case of strongly pushing toward the plate, the suction lead valve is supported by the suction lead valve support portion, thereby preventing deformation of the suction lead valve. In addition, since a valve function is provided between the outer peripheral portion of the suction lead valve contact portion of the suction lead valve support portion and the suction lead valve, a through hole is formed in the inner portion of the portion to which the valve function of the suction lead valve is given. The refrigerant gas from the seal passes through the through hole and flows into the cylinder bore. In addition, in the aspect in which the through-hole is formed, an effect equivalent to that in which the suction passage is enlarged can be expected, and the pressure loss during suction can be greatly reduced. Furthermore, if a valve function is provided between the outer periphery of the suction lead valve contact portion of the suction lead valve support portion and the suction lead valve, the suction lead valve is closed, i.e., the suction chamber side of the refrigerant gas passing through the through hole in the compression process. This can certainly prevent leakage. Therefore, even when the suction hole is enlarged for the purpose of reducing the pressure loss, deformation of the suction valve portion corresponding to the suction hole installation region is reliably prevented.

Moreover, it is preferable to form a groove or a recess in the contact surface side with respect to the suction lead valve of a suction lead valve support part. In this way, the contact area can be reduced while securing the support strength of the suction lead valve, and the problem that the valve opening operation is delayed due to lubricating oil adhesion can be reliably solved. In addition, when the groove or the recess and the suction chamber communicate with each other, the refrigerant gas in the suction chamber can be introduced into the groove or the recess, so that a quick and smooth valve opening operation can be performed by using the pressure of the introduced refrigerant gas. It can be secured.

Further, the contact surface with respect to the suction lead valve at the outer periphery of the suction lead valve contact portion of the suction lead valve support provided with the valve function is the suction lead valve seal portion and the surface of the suction lead valve located outside the suction lead valve support portion. It is preferable to match or to be located on the cylinder bore rather than the suction lead valve seal. In such a configuration, since the seal portion of the suction lead valve support portion having a small area is lifted from the suction lead valve seal portion, the suction lead valve is lifted. Since the valve opening delay due to the lubricating oil adhesion of the reed valve seal portion can be reduced, more rapid and smooth valve opening operation is ensured. However, the contact surface may be set to be located on the suction chamber side than the suction lead valve seal portion.

The suction lead valve support portion can be formed integrally with the valve plate, and the suction lead valve support portion can be formed separately from the valve plate. In the configuration in which the suction lead valve support portion and the valve plate are integrated, the position at which the suction lead valve support portion abuts on the suction lead valve may be adjusted by press molding, for example, after polishing of the valve plate.

(Effects of the Invention)

Thus, according to the compressor according to the present invention, since the suction lead valve support portion is provided in the suction hole installation region, which can contact the suction lead valve when the suction lead valve is closed, the deformation of the suction lead valve can be reliably prevented.

Further, according to the compressor according to the present invention, a valve function is provided between the outer circumferential portion of the suction lead valve contact portion of the suction lead valve support portion and the suction lead valve, and penetrates an inner portion of the portion where the valve function of the suction lead valve is granted. A hole is formed. That is, when the through hole is formed in the suction lead valve, the refrigerant gas from the suction chamber flows through the through hole and flows into the cylinder bore, so that an effect equivalent to that of the suction path is enlarged can be expected. The loss can be greatly reduced. In addition, if a valve function is provided between the outer circumferential portion of the suction lead valve contact portion and the suction lead valve of the suction lead valve support portion, it is possible to reliably prevent the leakage of the refrigerant gas that has passed through the through hole when the suction lid valve is closed. have. Furthermore, the contact surface with respect to the suction lead valve in the outer peripheral part of the suction lead valve contact part of the suction lead valve support part provided with the valve function is matched with the suction lead valve seal part of the suction lead valve located outside the suction lead valve support part. Alternatively, if the suction lead valve is positioned closer to the cylinder bore than the suction lead valve seal portion, a part of the suction lead valve is lifted toward the cylinder bore by the contact surface when the suction lead valve closes the suction hole. As a result, during the transition to the suction stroke, the suction chamber side and the cylinder bore side also lose the differential pressure, and the suction valve is attached to the seal portion by lubricating oil adhesion of the suction lead valve seal portion, thereby delaying the valve opening operation. Since the problem can be prevented, a quick and smooth valve opening operation can be ensured.

1 is a partial longitudinal sectional view of a compressor according to an embodiment of the present invention.

2 is an enlarged cross-sectional view of a connection portion between a cylinder block and a cylinder head of the compressor of FIG. 1.

3 is an explanatory view for explaining an installation position of a suction lead valve supporter on the valve plate of the compressor of FIG.

Explanation of symbols on the main parts of the drawings

1: compressor 2: cylinder block

3: front housing 4: cylinder head

5: crank chamber 6: cylinder bore

7: drive shaft 8: rotor

9 thrust bearing 10 swash plate

11: link mechanism 12: piston

12a: End portion of crankcase side of piston 13: Shoe

14 wall 15 suction chamber

16 discharge chamber 17 suction port

18: valve plate 19: suction hole

20: discharge hole 29: suction lead valve

22: stopper 23: discharge valve

24: retainer 25: suction hole installation area

26: suction lead valve seal 28: suction lead valve support

28a: Contact surface for suction lead valve of suction lead valve support

28b: recess 32: through hole

40, 41: Valve seat groove

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment of the compressor which concerns on this invention is described with reference to drawings.

1 to 3 are diagrams illustrating a compressor according to an embodiment of the present invention. In FIG. 1, 1 represents a compressor. The compressor 1 has a cylinder block 2, a front housing 3, and a cylinder head 4. A crank chamber 5 is formed between the cylinder block 2 and the front housing 3. A plurality of cylinder bores 6 are formed in the circumferential direction of the cylinder block 2.

In the crank chamber 5, a drive shaft 7 is provided so as to extend through the crank chamber 5. The rotor 8 is fixed to the drive shaft 7. The rotor 8 is supported by the front housing 3 via the thrust bearing 9. In addition, the drive shaft 7 is inserted through the swash plate 10. The swash plate 10 is connected to the rotor 8 via the link mechanism 11, and the inclination angle of the swash plate 10 is varied by the link mechanism 11. By varying the inclination angle of the swash plate 10, the amount of movement in the cylinder bore 6 of the piston 12 connected to the swash plate 10 is regulated, so that the discharge capacity of the compressor 1 is variable.

The piston 12 is provided in the cylinder bore 6 so that reciprocation is possible. The shoe 13 is fitted to the end part 12a of the crank chamber 5 side of the piston 12. The shoe 13 is in sliding contact with the outer circumferential surface of the swash plate 10, and the rotational contact of the swash plate 10 is converted into a reciprocating motion of the piston 12 by the sliding contact.

The inside of the cylinder head 4 is partitioned into the suction chamber 15 and the discharge chamber 16 by the wall 14. The suction chamber 15 is provided with a suction port 17 for sucking refrigerant gas into the suction chamber 15.

The valve plate 18 is attached between the cylinder block 2 and the cylinder head 4. The valve plate 18 is provided with a suction hole 19 for communicating the cylinder bore 6 and the suction chamber 15, and a discharge hole 20 for communicating the cylinder bore 6 and the discharge chamber 16. have. The suction hole 19 is opened and closed by the suction lead valve 29. The opening degree of the suction lead valve 29 is regulated by bringing the tip of the suction lead valve 29 into contact with the stopper 22 formed integrally with the cylinder block 2. On the other hand, the discharge hole 20 is opened and closed by a discharge valve 23 made of a reed valve. The opening degree of the discharge valve 23 is controlled by the retainer 24.

When the suction hole 19 is closed, the suction lead valve 29 abuts on the suction lead valve seal portion 26 positioned outside the suction hole installation region 25 of the valve plate 18 to allow the suction hole 19 to come into contact with the suction hole 19. ) Is intended to be closed. In this embodiment, the suction lead valve support part 28 which the suction lead valve 29 can contact when the suction lead valve closes is provided in the area | region of the suction hole installation area 25. As shown in FIG.

The contact surface 28a of the suction lead valve support portion 28 with respect to the suction lead valve is flush with the suction lead valve seal portion 26 of the valve plate 18 located outside the suction lead valve support portion 28. It is arranged. In addition, the contact surface 28a can also be arrange | positioned so that it may become the suction chamber side rather than the suction lead valve seal part 26. As shown in FIG. In addition, in this embodiment, since the suction lead valve support part 28 is formed integrally with the valve plate 18, after manufacturing, for example by grinding the valve plate 18, the suction lead valve support part 28 is provided. By performing press molding, the contact surface 28a can be matched with the suction lead valve seal part 26, or can be arrange | positioned rather than the suction lead valve seal part 26 in the suction chamber side.

A recess 28b is formed between the contact surface 28a of the suction lead valve support 28 and the suction lead valve seal 26 of the valve plate 18 located outside the suction lead valve support 28. As shown in FIG. 3, the recess 28b communicates with the suction chamber 15. 3A is a cross-sectional view of the valve plate 18 along the A ₁ O ₁ B ₁ line in FIG. 3B, and FIG. 3C is shown in FIG. 3B. It is a front view which shows the state which wrapped the suction lead valve 29. FIG.

In this embodiment, since the suction lead valve support part 28 which the suction lead valve 29 can contact when the suction lead valve closes is provided in the suction hole installation area 25, the cylinder bore 6 at the time of compression is provided. In the case where the internal pressure of the valve rises and the suction lead valve 29 is closed and pushed downward toward the valve plate, the suction lead valve 29 is supported by the contact surface 28a of the suction lead valve support part 28. Deformation or the like of the suction lead valve 29 is prevented. In addition, even when the suction hole 19 is enlarged in order to reduce the pressure loss, it is possible to reliably prevent the deformation of the suction lead valve 29 corresponding to the suction hole installation region 25.

The contact surface 28a of the suction lead valve support portion 28 with respect to the suction lead valve is arranged to be flush with the suction lead valve seal portion 26 of the valve plate located outside the suction lead valve support portion 28. Therefore, in the compression stroke, the suction lead valve 29 abuts on the contact surface 28a of the suction lead valve support portion 28, but when the internal pressure of the cylinder bore 6 is reduced to the suction stroke, the suction lead valve 29 Since 29 can be quickly separated from the contact surface 28a by receiving the differential pressure between the cylinder bore 6 and the suction chamber 15, it is possible to ensure a quick and smooth valve opening operation.

In addition, since the recessed portion 28b communicates with the suction chamber 15, the refrigerant gas in the suction chamber 15 flows into the recessed portion 28b, thereby ensuring a more rapid and smooth valve opening operation.

In addition, the suction lead valve support part 28 is formed integrally with the valve plate 18. If the suction lead valve support part 28 is formed integrally with the valve plate 18, the cost increase by the increase of the number of components can be prevented. Moreover, the suction lead valve support part 28 is formed in the contact surface 28a with respect to the suction lead valve 29, and the outer side, and has the recessed part 28b which communicates with the suction chamber 15. As shown in FIG. The valve function is provided between the outer peripheral part of the contact surface 28a of the valve board support part 28 with respect to the suction lead valve 29, and the suction lead valve 29. As shown in FIG. The valve function is exerted by bringing the suction lead valve 29 into contact with the contact surface 28a of the suction lead valve support part 28 when the suction lead valve 29 is closed. In addition, the through hole 32 is formed in the inner part of the contact part with respect to the contact surface 28a of the suction lead valve 29, ie, the inner part of the part to which the valve function is provided. In addition, 40 and 41 represent the valve seat grooves.

When the through hole 32 is formed in the suction lead valve 29, the suction gas is easily moved to the rear side (piston side) of the suction lead valve 29 through the through hole 32, so that the suction lead valve ( The differential pressure of 29) is eliminated, and the valve vibration can be suppressed. In addition, in this embodiment, since the through hole 32 is formed in the suction lead valve 29, the refrigerant gas from the suction chamber 15 passes through the through hole 32 and into the cylinder bore 6. Since it flows in, the effect equivalent to the expansion of a suction path can be anticipated substantially, and the pressure loss at the time of suction can be reduced significantly. Further, since a valve function is provided between the outer circumferential portion of the contact surface 28a of the suction lead valve support portion 28 and the suction lead valve 29, the through hole 32 is closed when the valve of the suction lead valve 29 is closed. It is possible to reliably prevent the refrigerant gas from leaking out.

In addition, since the contact surface 28a is arrange | positioned so that it may become surface-matched with the suction lead valve seal part 26 located in the outer side of the suction lead valve support part 28, as shown in FIG. 3, the suction lead valve seal part 26 The seal state with the contact surface 28a is also released at the same time as the seal state of the " Therefore, a quick and smooth valve opening operation of the suction lead valve 29 can be ensured. In addition, the contact surface 28a with respect to the suction lead valve 29 may be arrange | positioned so that it may become a cylinder bore rather than the suction lead valve seal part 26 located in the outer side of the suction lead valve support part 28. As shown in FIG. In this case, when the suction lead valve 29 closes the suction hole 19, a part of the suction lead valve 29 is lifted toward the cylinder bore by the contact surface 28a. Since the intake valve 29 is attached to the contact surface 28a by lubricating oil, the problem of delaying the valve opening operation can be eliminated, so that a quick and smooth valve opening operation of the intake lead valve 29 can be ensured. However, the contact surface 28a with respect to the suction lead valve 29 may be arrange | positioned so that it may become the suction chamber side rather than the suction lead valve seal part 26 located in the outer side of the suction lead valve support part 28. As shown in FIG. In addition, in this embodiment, although the valve seat grooves 40 and 41 are formed, the same effect can be enjoyed also in the aspect which does not provide the valve seat grooves 40 and 41. FIG.

In addition, by providing the suction lead valve support portion 28 as in the above-described embodiment, there is a possibility that the opening area of the suction hole 19 can be reduced and the pressure loss of the flow path can be increased. By performing R chamfering or C chamfering on the peripheral edge of the opening in the suction chamber 15 side, the pressure loss of the inlet part of the suction hole 19 can be reduced.

The present invention is widely applicable to a piston reciprocating compressor in which a piston is reciprocally installed in a cylinder bore, and these compressors are suitable for a compressor of a vehicle air conditioner.

Claims (4)

A cylinder bore in which fluid is compressed, a valve plate partitioning the cylinder bore and the suction chamber, a suction hole formed in the valve plate and communicating with the cylinder bore and the suction chamber, opening and closing the suction hole, A compressor having an intake lead valve in contact with an intake lead valve seal portion of a valve plate located outside the intake hole installation region, wherein the intake lead valve is also closed in the intake hole installation region of the valve plate when the intake lead valve is closed. While providing a suction lead valve support that can be abutted, while providing a valve function between an outer lead portion of the suction lead valve contact portion of the suction lead valve support portion and the suction lead valve and providing a valve function of the reed valve. Compressor characterized in that the through hole formed in the inner portion. The method of claim 1, The contact surface with respect to the suction lead valve in the outer peripheral part of the suction lead valve contact part of the said suction lead valve support part to which the said valve function was provided coincides with the suction lead valve seal part of the said suction lead valve located outside the suction lead valve support part. Or a cylinder bore side than the suction lead valve seal portion, or a suction chamber side than the suction lead valve seal portion. The method of claim 1, And said suction lead valve support portion is integrally formed with the valve plate. The method of claim 3, wherein The position where the said suction lead valve support part contacts a suction lead valve is adjusted by press molding after valve plate grinding | polishing.

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