KR20170072149A - Variable-capacity compressor control valve - Google Patents

Abstract

[assignment]
Provided is a control valve for a variable displacement compressor, which is capable of easily machining a valve body and reducing a machining time and a machining cost without causing a decrease in the valve closing property due to the axial center shift or a decrease in the slidability of the valve.
[Solution]
The valve body 20 includes a support member 20B having a guide hole 29 and a valve hole 22 in which the valve body 10 is slidably and freely slidable and a support member 20B having a Ps inlet and outlet 27, And a body member 20A formed with a Pc inlet and outlet 26. A supporting member 20B is inserted and fixed to the concave hole 20C provided in the body member 20A. Between the body member 20A and the support member 20B, a debris-encapsulating unit 20P for encapsulating the debris of the body member 20A and / or the support member 20B is provided.

Description

VARIABLE-CAPACITY COMPRESSOR CONTROL VALVE [0002]

The present invention relates to a control valve for a variable capacity compressor used in a car air conditioner or the like.

2. Description of the Related Art Conventionally, a swash plate type variable displacement compressor as shown in FIG. 11 is used as a compressor for a car air conditioner. The swash plate variable displacement compressor 100 includes a rotary shaft 101 that is rotationally driven by a forklift engine, a swash plate 102 attached to the rotary shaft 101, a crank chamber 104 A piston 105 reciprocated by the swash plate 102, a discharge chamber 106 for discharging the refrigerant compressed by the piston 105, a suction chamber 107 for suctioning the refrigerant, (Escape passage) 108 for escaping the pressure Pc of the chamber 104 to the suction chamber 107, and the like.

On the other hand, the control valve 1 'used in the variable displacement compressor is configured such that the discharge pressure Pd is introduced from the discharge chamber 106 of the compressor 100 and the discharge pressure Pd thereof is supplied to the compressor 100, And the pressure Pc of the crank chamber 104 is controlled by adjusting the pressure in accordance with the suction pressure Ps of the compressor 100. As a basic configuration, the valve chamber and the compressor 100, A Pd introduction port communicating with the discharge chamber 106 of the compressor 100 is provided on the upstream side of the valve section and a Pd introduction port communicating with the discharge chamber 106 of the compressor 100 is provided on the downstream side of the valve section, (Valve rod) for opening and closing the valve orifice, and a valve body (not shown) for moving the valve body in the valve opening and closing direction (up and down direction) (Ps) from the compressor (100) to the Ps A pressure sensitive chamber introduced through the introduction port and a depressurizing action member for urging the valve body in the valve opening and closing direction in response to the pressure in the depressurization chamber, The valve portion is constituted by a valve portion denoted by reference numeral 11 'in FIG. 11 (see, for example, Patent Document 1, etc.).

In the control valve 1 'having such a configuration, when a solenoid portion including a coil, a stator and a attractor of an electromagnetic actuator is energized, the plunger is pulled to the attracting member, and accordingly, And is moved in the valve closing direction so as to follow the plunger by the biasing force of the valve closing spring. On the other hand, the suction pressure Ps introduced from the compressor 100 through the Ps inlet is introduced into the decompression chamber through a gap or the like formed between the plunger and the guide pipe disposed on the outer periphery thereof from the inlet / outlet chamber, The displacement member (e.g., bellows device) is operated to cause the expansion and contraction displacement (shrinkage if the suction pressure Ps is high, elongation when the suction pressure Ps is low) in response to the pressure (suction pressure Ps) Whereby the valve body portion of the valve body is lifted and lowered relative to the valve body to adjust the valve opening degree of the valve body portion 11 '. That is, the valve opening degree is determined by the attraction force of the plunger by the solenoid portion, the biasing force (stretching force) by the expansion and contraction displacement of the reduced pressure acting member, and the biasing force by the plunger spring (valve opening spring) and the valve closing spring , The pressure Pc of the crank chamber 104 (hereinafter sometimes referred to as crank chamber pressure Pc or only pressure Pc) is controlled in response to the valve opening degree.

In addition, with respect to the variable displacement compressor, for example, it is possible to shorten the time required until the discharge capacity becomes large at the time of the compressor start, and to suppress or reduce the decrease in the operation efficiency of the compressor during normal control An improved swash plate type variable displacement compressor as shown in FIG. 12 is already proposed.

This improved swash plate type variable displacement compressor 200 is configured such that a valve body (valve rod) in a control valve used therein is constituted by a main valve body and a sub valve body, and an in-valve bypass passage 16 'is formed in the main valve body The control valve 2 'basically has a valve chamber provided with a valve orifice and a Ps inlet and outlet communicating with the suction chamber 107 of the compressor 200. The compressor 200 is provided on the upstream side of the valve chamber, A valve body provided with a Pd inlet communicating with the discharge chamber of the compressor and having a Pc inlet and outlet communicating with the crank chamber of the compressor at a downstream side of the valve; And a plunger for moving the main valve body in the direction of opening and closing the valve; a decompression chamber through which the suction pressure Ps is introduced through the Ps inlet and outlet from the compressor 200; In response to the pressure of And a depressurizing and stirring member for depressurizing the main valve body in the direction of opening and closing the valve, and for escaping the pressure Pc of the crank chamber 104 to the suction chamber 107 of the compressor 200 through the Ps inlet and outlet Valve inductance passage 16 'is provided in the main valve body and a valve body for opening and closing the in-valve escape passage 16' is provided, and the suction force of the electronic actuator causes the plunger to move from the lowest position to the upper position , The sub valve body moves upward with the valve in-fl ow passageway (16 ') closed together with the plunger, and the main valve body moves upwards so as to follow the sub valve body And when the plunger is further moved upwardly after the valve opening is closed by the main valve body, the sub valve body opens the in-valve bypass passage (16 ') The main valve body and the valve body are constituted by a main valve portion denoted by reference numeral 11 'in FIG. 12, and a sub-valve portion denoted by reference numeral 12' is constituted by the sub-valve body and the in-valve bypass passage See Patent Document 2 below).

In the control valve 2 'having such a configuration, when the solenoid portion consisting of the coil, the stator, and the attractor of the electromagnetic actuator is energized during the normal control (during Pd → Pc control), the plunger is pulled to the attracting member, The main valve body is moved in the valve closing direction by the biasing force of the valve closing spring following the movement of the sub valve body integrally with the plunger in the upward direction. On the other hand, the suction pressure Ps introduced from the compressor 200 through the Ps inlet and outlet is introduced into the pressure reducing chamber through the lateral hole or the like of the plunger from the inlet / outlet chamber, and the pressure reducing member (for example, the bellows device) And the displacement (stress) is transmitted to the main valve body by the expansion / contraction displacement (shrinkage if the suction pressure Ps is high and elongation when the suction pressure is low) in response to the pressure (suction pressure Ps) The valve opening degree of the main valve portion 11 'is adjusted. That is, the valve opening degree is determined by the plunger suction force by the solenoid portion, the biasing force (stretching force) by the expansion and contraction displacement of the reduced pressure acting member, the biasing force by the plunger spring (valve opening spring) And the pressure Pc in the crank chamber 104 is controlled in accordance with the degree of opening of the valve. In this case, since the main valve body is always urged upward by the urging force of the valve closing spring and the sub valve body is always urged downward by the biasing force of the valve opening spring, Valve escape path 16 'is shut off in the main valve body and the crank chamber pressure Pc is not escaped to the suction chamber 107 through the in-valve escape passage 16' .

On the other hand, at the time of the compressor start-up, the solenoid portion is energized, the plunger is pulled to the suction member, the sub-valve body moves upward together with the plunger, The valve body is closed by the main valve portion of the main valve body, and then the plunger is moved further in the upward direction, whereby the sub valve body is moved to the in-valve bypass passage 16 ' And the crank chamber pressure Pc is escaped to the suction chamber 107 through the two passages of the in-cab escape passage 108 and the in-valve escape passage 16 '(for details, refer to Patent Document 2 Etc.).

Japanese Patent Application Laid-Open No. 2010-185285 Japanese Patent Application Laid-Open No. 2013-130126

However, in the control valves for variable capacitors of the above-mentioned various types, the axial displacement between the valve opening (valve seat portion) and the guide hole (sliding portion) where the valve body is slidably and freely slidable is suppressed and erosion In general, the entire valve body is made of a high-hardness material such as stainless steel. In other words, the valve body is composed of one part made of a high-hardness material. Therefore, there is a problem that the processing of the valve body is difficult and the cost is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the circumstances described above, and it is an object of the present invention to provide a valve control apparatus and a valve control apparatus which are capable of reducing the valve closing property (valve closing property) And to provide a control valve for a variable displacement compressor capable of reducing machining time and machining cost.

In order to achieve the above object, a control valve for a variable capacity compressor according to the present invention basically has a valve chamber provided with a valve hole and a Ps inlet and outlet communicating with the suction chamber of the compressor, A valve body provided with a Pd inlet communicating with the discharge chamber of the compressor and provided with a Pc inlet and outlet for communicating with the crank chamber of the compressor downstream of the valve culvert, Pressure chamber in which a suction pressure Ps is introduced from the compressor through the Ps inlet and outlet, and a valve for opening and closing the valve, in response to the pressure in the pressure-reducing chamber, And a pressure reducing action member for urging the valve body in a valve opening and closing direction, wherein the valve body includes a guide hole And a support member on which the valve orifice is formed and a body member on which the Ps inlet and outlet, the Pd inlet, and the Pc inlet and outlet are formed, and the support member is inserted into a concave hole provided in the body member ) Is fixed.

In a preferred embodiment, the concave hole includes an upper large-diameter hole and a lower small-diameter hole, and a depressed portion of the support member to be inserted into the concave hole includes an upper large-diameter portion and a lower small-diameter portion , The support member is inserted and fixed in the concave hole in such a posture that the upper large diameter portion is fitted to the upper large diameter hole and / or the lower small diameter portion is fitted to the lower small diameter hole.

In a further preferred embodiment, the support member is inserted into the concave hole in a posture in which the upper large-diameter portion is fitted to the upper large-diameter hole, and a gap is provided between the inner periphery of the lower small-diameter hole and the outer periphery of the lower small- And the lower end of the lower small-diameter portion becomes the valve hole, and a horizontal hole communicating with the Pd introduction port of the body member through the gap is formed in the lower small-diameter portion.

In another preferred embodiment, a debris-encapsulating portion for encapsulating debris of the body member and / or the supporting member is provided between the body member and the supporting member.

The debris-encapsulating portion is preferably divided by a ring-shaped protrusion provided on the bottom surface of the concave hole or on the opposed surface of the support member facing the bottom surface of the concave hole.

Preferably, the debris-encapsulating portion is formed by an upward stepped surface of the concave hole formed by adhering a step or an annular projection provided on an opposed surface of the support member facing the upward stepped surface thereof .

In a further preferred embodiment, the tip of the annular projection is formed at an acute angle.

In another preferred embodiment, the inner periphery of the concave hole and the outer periphery of the depressed portion to be inserted into the concave hole of the supporting member are formed by being stepped, and the debris-encapsulating portion has an inner corner portion And an annular inclined surface provided on the lower stepped surface of the inserting portion so as to be abutted against the corner portion.

The support member is preferably made of a material having a hardness higher than that of the body member.

In a preferred embodiment, the support member is made of a stainless steel material, and the body member is made of an aluminum material, a brass material, or a resin material.

According to the control valve for a variable capacity compressor of the present invention, the valve body includes a support member having a guide hole and a valve orifice through which the valve body is slidably freely slidable, and a body member having Ps inlet and outlet, Pd inlet, and Pc inlet and outlet, And the support member is inserted and fixed to the concave hole provided in the body member. That is, since the valve body is constituted by the two parts of the support member and the body member, the valve closing property caused by the shaft- The working of the valve body can be facilitated, and the machining time and machining cost can be effectively reduced.

In this case, if the supporting member is made of a material having a high hardness such as stainless steel or the like and the body member is made of a material having a low hardness such as an aluminum material, a brass material, or a resin material, The lowering of the closure property and the lowering of the slidability of the valve can be more effectively suppressed and the processing of the valve body can be further facilitated and the weight of the valve body can be reduced.

Further, since the debris-encapsulating portion for encapsulating the debris of the body member and / or the supporting member is provided between the body member and the supporting member, for example, the body member and the supporting member are made of different materials , And the support member is made of a material having a high hardness such as a stainless steel material and the body member is made of a material having a low hardness such as an aluminum material, a rawmaterial or a resin material), the support member The debris (for example, debris of the body member) that may be generated when the debris (debris) is inserted (assembled) is sealed in the debris sealing portion, and the defective operation due to the debris flowing inside the valve can be reliably suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a longitudinal sectional view showing a main valve, an open / close valve, and a closed state (during normal control) of a first embodiment of a control valve for a variable capacity compressor according to the present invention. Fig.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a control valve for a variable capacity compressor,
3 is a longitudinal sectional view showing the main valve, the closed valve, and the sub valve in the first embodiment of the control valve for a variable capacity compressor according to the present invention.
Fig. 4 is a view showing a plunger used in a control valve for a variable capacity compressor according to the present invention, A is a cross-sectional view taken along the line XX of the sight line shown in FIG. 4A, and FIG. 5E is a cross-sectional view taken along line YY of FIG.
5 is an enlarged cross-sectional view of a main portion showing a modified example of the debris bag portion shown in Fig.
6 is a longitudinal sectional view showing a main valve, an opening valve, and a sub valve of a second embodiment of a control valve for a variable capacity compressor according to the present invention in a closed state (during normal control).
7 is a longitudinal sectional view showing a main valve, a closed valve, and a sub valve in a second embodiment of a control valve for a variable capacity compressor according to the present invention in a closed state (at the start of compressor start-up).
8 is a longitudinal sectional view showing the state of the main valve, the closed valve, and the sub valve of the second embodiment of the control valve for a variable capacity compressor according to the present invention (when the compressor is started).
9 (A) and 9 (B) are enlarged cross-sectional views of a main portion showing a modified example of the debris-encapsulating portion shown in Fig.
10 is a longitudinal sectional view showing a main valve, an open / close valve, and a closed state (under normal control) of a control valve for a variable capacity compressor according to a third embodiment of the present invention.
11 is a view showing a refrigerant pressure circulation state between a compressor and a control valve in the first conventional example;
FIG. 12 is a view showing the refrigerant pressure circulation state between the compressor and the control valve in the second conventional example, wherein FIG. 12 (A) shows the normal operation and FIG. 12 (B) shows the compressor at startup.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

≪ First Embodiment >

1 to 3 are longitudinal sectional views showing a first embodiment of a control valve for a variable capacity compressor according to the present invention, respectively. Fig. 1 is a sectional view of a main valve: (When the compressor is started), FIG. 3 shows the state of the main valve, the closed valve, and the sub-valve (when the compressor is started).

In this specification, descriptions (positions) and directions (positions) and directions (up and down, left and right, front and rear) are attached for the sake of convenience in order to avoid complicated explanation. As long as it does not refer to it.

In the drawings, the gaps formed between the members, the distance between the members, and the like are different from each other in order to facilitate understanding of the invention and to facilitate the convenience of the system. It may be drawn large or small.

The control valve 1 of the illustrated embodiment includes a valve body 20 having a valve orifice 22 and a valve body 10 having a main valve body 15 for opening and closing the valve orifice 22, An electronic actuator 30 for moving the valve body 10 (main valve body 15) in the valve opening and closing direction (up and down direction), and a bellows device 40 as a reduced pressure acting member.

The electromagnetic actuator 30 includes a bobbin 38, a coil 32 for energizing excitation coiled on the bobbin 38 and a connector head 31 attached to the upper side of the bobbin 38 via an attachment plate 39, A stator 33 and a suction member 34 disposed on the inner peripheral side of the coil 32. The stator 33 and the suction member 34 are fixed to the outer periphery A plunger 37 having a sectional concave shape and slidable in the vertical direction on the inner peripheral side of the guide pipe 35 below the suction member 34 and a cylindrical housing 60 And a holder 29 disposed between the lower end of the housing 60 and the guide pipe 35 for fixing them to the upper portion of the valve body 20. In this embodiment, a suction member 34 having a concave shape is integrally formed on the inner periphery of the lower portion of the cylindrical stator 33. The portion of the electromagnetic actuator 30 including the coil 32, the stator 33, and the attractor 34 except the plunger 37 is referred to as a solenoid portion 30A.

A stator 65 having a short column shape is fixed to the upper portion of the stator 33 by press fitting or the like and the stator 33 is fixed to the stator 33 at a position between the stator 65 and the aspirator 34 A pressure reducing chamber 45 into which the suction pressure Ps of the compressor 100 is introduced is formed in the pressure reducing chamber 45. The pressure reducing chamber 45 is provided with a bellows 41 as a reduced pressure acting member, A reverse stopper 43 of an inverse concave shape and a compression coil spring 44 are disposed on the inner circumferential surface of the bellows 40. The bellows device 40 is composed of a ring- An upper small-diameter portion (an end opposite to the sub-valve portion 17a) 17d of the sub-valve body 17 described later is inserted and supported in the concave portion of the lower stopper 43. The lower stopper 43 And the compression coil spring 46 which compresses in the direction to contract the bellows 40 is shrunk and fitted between the suction coil 34 and the suction coil 34. [

The plunger 37 is constituted by a cylindrical upper half portion 37A and a columnar lower half portion 37B and is provided with a valve body 17 And an insertion hole 37b for inserting an upper small-diameter portion 15f (described in detail later) of the main valve body 15 is formed on the top surface of the columnar lower half 37B, The outer peripheral portion of the insertion hole 37b of the valve body 17 serves as a hooking portion 37a for hooking the intermediate large diameter locking portion 17c of the sub valve body 17. [

The valve body 17 and the plunger 37 are moved downward (in the valve opening direction) between the aspirator 34 and the intermediate large-diameter locking portion 17c of the sub-valve body 17 (plunger 37) (A valve opening spring) 47 made of a cylindrical compression coil spring to which the valve body 17 is attached is shrunk and attached so that the plunger spring 47 is engaged with the intermediate large diameter locking portion 17c Is pushed by the plunger 37 and is moved up and down together with the plunger 37 (up and down).

4, at the lower portion (a portion of the upper portion by a predetermined distance from the lower end) of the columnar lower half 37B of the plunger 37, A cut-in 37t of a generally semicircular shape is formed (toward the transverse direction) in a plan view, and the lower side of the groove 37t (that is, the groove 37t and the columnar lower half A slit 37s having a width substantially equal to the hole diameter of the insertion hole 37b and linearly extending from the lower end edge of the columnar lower half 37B to the insertion hole 37b, Respectively. The height (in the vertical direction) of the recess 37t is slightly larger than the height of the flange-shaped locking portion 15k of the main valve body 15, and the height of the slit 37s (in the vertical direction) Diameter portion 15f of the main valve body 15 so that the main valve body 15 can vertically move with respect to the plunger 37 (details will be described later). The width (in the transverse direction) of the slits 37s is slightly larger than the outer diameter of the upper small-diameter portion 15f of the main valve body 15, Is smaller than the outer diameter of the shape locking portion 15k.

The valve body 10 is composed of a main valve body 15 and a sub valve body 17 arranged in the longitudinal direction (along the axis O direction).

The main valve body 15 disposed on the lower side is composed of a lower depressed portion 15b, a lower small-diameter portion 15c, a main valve body portion 15a, a middle small-diameter portion 15d, an upper depressed / A small diameter portion 15f and a flange-shaped lock portion 15k. At the center of the inside thereof, there is provided a through hole 16A at an end portion constituting a part of the in-valve escape passage 16 so as to penetrate in the longitudinal direction And the upper end portion of this through hole 16A serves as the sub valve seat portion 23 to which the lower end portion (sub valve portion) 17a of the sub valve body 17 is in contact. In the middle small-diameter portion 15d of the main valve body 15, a plurality of lateral holes 16s are provided.

The upper small-diameter portion 15f of the main valve body 15 is gently recessed in the recess 37b (below the groove 37t of the recessed portion 37b) The engagement portion 15k has a larger diameter than the scooping hole 37b so that when the plunger 37 is moved upward with respect to the main valve body 15, And the flange-shaped engagement portion 15k is hooked by the formed hook portion 37k to be prevented from slipping out.

The auxiliary valve body 17 disposed on the upper side of the main valve body 15 has a reverse conical shape that is in contact with the auxiliary valve seat portion 23 which is the upper end portion of the through hole 16A, The body portion 17b formed with the tapered portion 17a on the upper surface thereof, the conical portion 17e formed with the intermediate large-diameter locking portion 17c, and the upper small-diameter portion 17d inserted and supported in the concave portion of the lower stopper 43 And the tapered portion 17a serves as a sub-valve portion for opening and closing the in-valve escape passage 16. [ Here, the sub-valve seat portion 23 and the sub-valve portion 17a constitute the sub-valve portion 12. In this example, a portion of the trunk portion 17b below the intermediate large-diameter locking portion 17c is inserted with a slight clearance in the insertion hole 37b of the plunger 37, and the intermediate large-diameter locking portion 17c, (A portion disposed on the inner side of the cylindrical upper half portion 37A) than the other portion is slightly larger in diameter than the other portion.

(For example, a gap between the trunk portion 17b and the insertion hole 37b) of the respective portions around the sub-valve body 17 is set such that the sub-valve body 17 is in contact with the main valve body 15 (That is, the position in which the in-valve avoidance passage 16 is opened) even when the sub valve body 17 is close to the main valve body 15 The lower end portion of the inverted conical sub valve portion (tapered portion) 17a enters into the through hole 16A and the sub valve portion 17a So that the sub valve body 17 is aligned with respect to the main valve body 15. More specifically, when the sub valve body 17 is in the topmost position with respect to the main valve body 15, a part of the inverted conical sub valve portion 17a is positioned in the through hole 16A, Dimensional shape (in particular, see Fig. 3).

When the valve body 10 (the main valve body 15 and the sub valve body 17) and the plunger 37 are assembled, for example, the valve body 20 (the guide hole 19 of the valve body 20) The flange-shaped locking portion 15k and the upper small-diameter portion 15f of the assembled main valve body 15 are inserted into the groove 37t and the slit 37s of the plunger 37, respectively, The plunger 37 is transversely moved so that the upper small diameter portion 15f is inserted into the scooping hole 37b provided at the center of the plunger 37. Thereafter, A portion below the locking portion 17c) may be inserted into the scooping hole 37b from above.

On the other hand, the valve body 20 includes a body member 20A provided with a concave hole 20C at the center of the upper portion thereof, and a support member 20B interposed between the concave hole 20C and the interior of the valve body 20 by press- And has a split configuration.

The support member 20B is made of a material having relatively high hardness such as stainless steel (SUS), for example. The support member 20B is provided on the upper side of the depression portion 24 to be inserted into the concave hole 20C, A convex stopper portion 24A for defining a position is provided. A guide hole 19 (upper guide hole 19A) through which the upper depressed / depressed portion 15e of the main valve body 15 is slidably and freely slidable is formed in the central portion of the support member 20B And a lower end portion of the upper guide hole 19A is a valve hole 22 (valve seat portion) which is opened and closed by the main valve body portion 15a of the main valve body 15. [ Here, the main valve portion 11 is composed of the main valve body portion 15a and the valve orifice 22. As described above, since the support member 20B is made of a high-hardness material such as stainless steel, its specific gravity is high.

The body member 20A is made of a material having a relatively low specific gravity (i.e., a material having a relatively low hardness) relative to stainless steel such as aluminum, mineral oil, or resin, Out chamber 28 of the suction pressure Ps of the compressor 100 is formed on the outer periphery of the stopper portion 24A in a state in which the support member 20B And a plurality of Ps outlets 27 are formed on the outer circumferential side of the input / output chamber 28. The suction pressure Ps introduced from the Ps inlet and outlet 27 into the inlet and outlet chamber 28 is adjusted by the slit 37s and the groove 37t formed in the bottom of the plunger 37, Through a gap formed between the inner wall 17b of the plunger 37 and the insertion hole 37b of the plunger 37 and a gap 36 formed between the outer periphery of the plunger 37 and the guide pipe 35, 45).

A guide hole 19 for accommodating the main valve body portion 15a of the main valve body 15 and a guide hole 19 for receiving the main valve body portion 15a are formed in the center of the bottom of the recess 20C of the body member 20A, A receiving hole 18 of a diameter smaller than the hole diameter of the hole 20C is continuously provided and a lower swinging and inserting portion 15b of the main valve body 15 is slidably and sharply guided And a hole 19 (lower guide hole 19B) is formed. A conical compression coil spring is provided between the outer peripheral corner of the bottom of the receiving hole 18 and the stepped portion 15g provided on the outer periphery of the lower portion of the main valve body 15a of the main valve body 15 And the valve closing spring 50 is shrunk and attached to the main valve body 15 by the urging force of the valve closing spring 50 so that the main valve body 15 (the stepped portion between the upper pawl portion 15e and the upper small- Is pressed against the plunger 37. As shown in Fig.

A valve chamber 21 is formed in the receiving hole 18 (below the valve orifice 22 of the support member 20B). The valve chamber 21 is provided with a discharge chamber A plurality of Pd introduction openings 25 communicating with the Pd introduction openings 106 are opened. A ring-shaped filter member 25A is disposed on the outer periphery of the Pd introduction port 25 in the body member 20A.

A cover member 48 functioning as a filter is fixed to the lower end portion of the body member 20A by engaging and press fitting or the like and the lower side of the main valve body 15 above the cover member 48, (Inlet / outlet) 26 which communicates with the crank chamber 104 of the compressor 100. [ This Pc inlet / outlet chamber (inlet / outlet port) 26 is formed by a through hole 16A, a lateral hole 16s, a gap between the lower portion of the upper guide hole 19A and the intermediate small-diameter portion 15d, And communicates with the Pd introduction port 25 through the gap between the main valve bodies 15a and the valve chamber 21.

1, between the body member 20A and the support member 20B constituting the valve body 20, a body member 20A and a support member 20B (Pocket portion) 20P for sealing the chip (particularly, the scraped residue of the body member 20A having a relatively low hardness) that can be generated when the body member 20A is assembled .

Specifically, an annular projection 24B having a sharp tip at its end is projected from the bottom (opposite surface) of the support member 20B (the depression portion 24 of the support member 20B) facing the bottom surface of the concave hole 20C , The annular projection 24B is brought into contact with the bottom surface of the concave hole 20C when the depressed portion 24 is inserted into the concave hole 20C (in this case, the annular projection 24B is inserted into the concave hole 20C (The inner wall surface of the concave hole 20C) and the depressed / depressed portion 24 (the inner wall surface of the concave hole 20C) of the depressed portion 20C (Particularly, the scraped residue of the body member 20A having a relatively low hardness) caused by the sliding of the annular protrusion 24B and the outer circumferential surface of the concave hole 20C, And is encapsulated in the portion 20P.

In the example shown in Fig. 1, the annular protrusion 24B for partitioning the debris-encapsulating portion 20P is formed in the depressed portion 24 of the support member 20B. For example, as shown in Fig. 5 Likewise, an annular projection 20D for partitioning the debris-sealing portion 20P may be formed on the bottom surface (in the example, the inner end of the bottom surface) of the concave hole 20C of the body member 20A. In this case, since the annular projection 20D is tighter than the bottom surface of the depressed portion 24, a part (tip portion) of the annular projection 20D is in contact with the bottom surface of the depressed portion 24 in a bent state, The debris-encapsulating portion 20P is partitioned by the outer peripheral corner of the bottom of the recess 20D and the recess 20C.

In this embodiment, the through hole 16A formed in the main valve body 15, the groove 37t provided in the plunger 37, the slit 37s, the inlet / outlet chamber 28 and the like serve as the crank chamber 104 Valve escape passage 16 for escaping the pressure Pc of the main valve body 15 to the suction chamber 107 of the compressor 100 through the Ps inlet and outlet 27 is formed and the through hole 16A Valve side valve portion 17a of the sub-valve body 17 is brought into contact with the sub-valve seat portion 23 which is the upper edge portion of the in-valve bypass passage 16, so that the in-valve bypass passage 16 is opened and closed.

1, the plunger 37, the main valve body 15, and the sub valve body 17 are in the lowest position (the plunger 37 Of the main valve body 15 is in contact with the stopper portion 24A while the main valve portion 11 is fully opened and the sub valve portion 12 is fully closed) The first lift amount Lv is a vertical distance between the inner flange portion 37k of the plunger 37 and the flange-like hook portion 37k of the main valve body 15 15k is a predetermined amount La and the maximum lift amount (second lift amount) Lp of the plunger 37 (the lift amount from the lowest position to the highest position of the plunger 37) The first lift amount Lv + the predetermined amount La.

Next, the operation of the control valve 1 having the above-described configuration will be described.

The lift amount of the plunger 37 becomes the first lift amount Lv at maximum at the time of normal control (at the time of Pd? Pc control), and when the compressor is started (when Pc? Ps is controlled) The lift amount of the plunger 37 becomes the second lift amount Lp.

That is, when the solenoid unit 30A including the coil 32, the stator 33, and the attractor 34 is energized at the time of normal control (at the time of Pd? Pc control), the attractor 34 is plunger The intermediate large-diameter locking portion 17c of the sub-valve body 17 is engaged with the flange portion 37a of the plunger 37. As a result, The main valve body 15 is moved upward (valve closing direction) by the biasing force of the valve closing spring 50 following the movement of the valve body 17 in the upward direction. On the other hand, the suction pressure Ps introduced from the compressor 100 to the Ps inlet / outlet 27 is supplied from the inlet / outlet chamber 28 through the slit 37s and the groove 37t of the plunger 37 to the decompression chamber 45 The expansion and contraction displacement (shrinkage when the suction pressure Ps is high, elongation when the suction pressure Ps is low), and the bellows device 40 (vacuum pressure in the inside) is changed in accordance with the pressure (suction pressure Ps) And the displacement is transmitted to the main valve body 15 through the plunger 37 and the valve body 17 so that the valve opening degree (the distance between the valve body 22 and the main valve body portion 15a) And the pressure Pc of the crank chamber 104 is adjusted in response to the valve opening degree. Accordingly, the inclination angle of the swash plate 102 of the compressor 100 and the stroke of the piston 105 are adjusted, and the discharge capacity is increased or decreased.

In this case, the main valve body 15 is always urged upward by the biasing force of the valve closing spring 50, and the valve body 17 is always downwardly biased by the biasing force of the valve opening spring 47 The valve sub-valve portion 17a is pressed against the sub-valve seat portion 23 (the sub-valve portion 12 is closed) and the in-valve escape passage 16 is closed by the main valve body 15, Lt; / RTI > Therefore, the crank chamber pressure Pc does not escape to the suction chamber 107 through the in-valve escape passage 16.

On the other hand, when the compressor is started, the solenoid portion 30A is energized, the plunger 37 is drawn into the suction member 34, and the sub-valve body 17 together with the plunger 37 moves upward The valve body 22 is closed by the main valve body portion 15a of the main valve body 15 and then the plunger 37 is further moved in accordance with the upward movement so that the main valve body 15 is moved upward, So that the sub valve body 17 opens the in-valve escape passage 16 and the pressure Pc of the crank chamber 104 reaches the in-cab escape passage 108 and the in- Is escaped to the suction chamber 107 through the two passages of the escape passage 16.

The main valve body 15 is urged by the biasing force of the valve closing spring 50 until the plunger 37 reaches the first lift amount Lv until the amount of upward movement of the plunger 37 reaches the first lift amount Lv. When the upward movement amount reaches the first lift amount Lv, the valve body 20 is moved by the main valve body portion 15a of the main valve body 15 so as to follow the upward movement of the valve body 20 The plunger 37 is moved upward by the predetermined amount La from the valve closing state of the main valve unit 11 (the state shown in Fig. 3) ). In other words, after the upward movement amount of the plunger 37 reaches the first lift amount Lv, the inner flange-shaped hook portion 37k of the plunger 37 is engaged with the flange-like hook portion 15k of the main valve body 15 (The first lift amount Lv + the predetermined amount La = the second lift amount Lp) by the predetermined amount La until the valve body 17 is engaged with the first lift amount Lv. In this case, since the main valve body 15 remains floating in the valve closed state, the sub valve portion 17a of the sub valve body 17 is lifted by the predetermined amount La from the sub valve seat portion 23 , Whereby the valve escape passage 16 is opened. When the flange-shaped hook portion 37k of the plunger 37 is engaged with the flange-shaped hook portion 15k of the main valve body 15, even if the solenoid portion 30A generates suction force, the plunger 37 and the sub- The body 17 is not pulled any more.

As described above, in the control valve 1 of the present embodiment, the valve body 20 includes the guide member 29 and the support member 20B, in which the valve member 22 is formed, A Ps inlet and outlet port 27, a Pd inlet port 25 and a Pc inlet and outlet port 26. The support member 20B is inserted into the concave hole 20C provided in the body member 20A, Since the valve body 20 is composed of two parts, that is, the support member 20B and the body member 20A, the valve closing property due to the axial displacement is reduced, The valve body 20 can be easily machined without lowering the slidability, and the machining time and machining cost can be effectively reduced.

In addition, since the support member 20B is made of a material having a high hardness such as a stainless steel material, and the body member 20A is made of a material having a low hardness such as an aluminum material, a milking material, or a resin material, It is possible to more effectively suppress the lowering of the valve closure property of the valve body 20 and the lowering of the slidability of the valve body 10 so that the processing of the valve body 20 becomes easier and the weight of the valve body 20 can be reduced.

Since the debris-sealing portion 20P for sealing the debris of the body member 20A and / or the supporting member 20B is provided between the body member 20A and the supporting member 20B, for example, Even when the support member 20B is made of a material having a high hardness such as a stainless steel material and the body member 20A is made of a material having a low hardness such as an aluminum material, Debris (for example, debris of the body member 20A) that may be generated when the support member 20B is inserted (assembled) into the concave hole 20C provided in the debris sealing portion 20P is sealed in the debris sealing portion 20P, It is possible to reliably suppress the malfunction due to the debris flowing inside the valve.

≪ Second Embodiment >

6 to 8 are longitudinal sectional views showing a second embodiment of a control valve for a variable capacity compressor according to the present invention, respectively, and Fig. 6 is a sectional view of a main valve: 7 shows the state of the main valve: the closed valve, the closed valve (when the compressor is started), and FIG. 8 shows the state of the main valve: the closed valve and the subvalve: when the compressor is started.

The control valve 2 of the second embodiment differs from the control valve 1 of the first embodiment only in the configuration of the valve main body and the main valve body in the valve basically. Therefore, components having the same functions as those of the first embodiment are denoted by the same reference numerals, and a detailed description thereof will be omitted. In the following, only the differences will be described in detail.

The control valve 2 of the present embodiment has the control valve 1 of the first embodiment in which the upper depressed portion 15e and the intermediate small diameter portion 15d of the main valve body 15 are elongated, The lower small-diameter portion 15c and the lower depressed portion 15b on the lower side of the main valve body portion 15a are omitted.

The depressed portion 24 of the support member 20B of the valve body 20 is formed by attaching an end and the upper large-diameter portion 24a (the outer shape corresponding to the depressed portion 24 of the first embodiment) A lower small-diameter portion 24b having a longer vertical length than the upper large-diameter portion 24a is provided on the lower side of the lower small-diameter portion 24a, And a flange-shaped contact portion 24c which is to be turned on the sugar-dish is provided so as to protrude outward toward the stepped portion (single-ended portion) between the receiving holes 18.

On the other hand, the concave hole 20C in the body member 20A of the valve body 20 is also formed by being stepped, and the upper large-diameter hole 20Ca (in the first embodiment) in which the upper large- And a lower small-diameter hole 20Cb in which the lower small-diameter portion 24b is to be separated. The center of the lower small-diameter hole 20Cb is formed at the center of the bottom of the lower small-diameter hole 20Cb, And a receiving hole 18 having an end for receiving the receiving portion 15a. A valve closing portion 15b is formed between the stepped portion provided on the inner periphery of the receiving hole 18 and the stepped portion 15g provided on the outer periphery of the lower portion of the main valve body portion 15a of the main valve body 15, The spring 50 is contracted and mounted.

Although the valve chamber 21 is formed in the receiving hole 18 (the lower portion of the support member 20B below the valve orifice 22), the lower small-diameter hole 20Cb in the recessed hole 20C A plurality of Pd introduction ports 25 communicating with the discharge chamber 106 of the compressor 100 are opened and a ring shaped filter member 25A is fitted on the outer periphery of the Pd introduction port 25, A plurality of lateral holes 25s communicating with the Pd introduction port 25 are formed in the lower small-diameter portion 24b of the depressed portion 24 (in place of the intermediate small-diameter portion 15d of the main valve body 15) And the Pc inlet / outlet chamber (inlet / outlet port) 26 communicating with the crank chamber 104 of the compressor 100 is provided between the valve chamber 21 and the valve body 22 and the gap between the valve body 22 and the main valve body 15a The gap between the lower portion of the hole 19 (upper guide hole 19A) and the intermediate small-diameter portion 15d → the horizontal hole 25s of the lower small-diameter portion 24b → the lower small-diameter portion 24b and the lower- ) (Which will be described later in detail) And communicates with the Pd introduction port (25).

In this embodiment, the outer periphery of the upper large-diameter portion 24a is in contact with the inner periphery of the upper large-diameter hole 20Ca (in other words, the upper large-diameter portion 24a is in contact with the upper large-diameter hole 20Ca) The support member 20B is attached to the concave hole 20C of the body member 20A with a slight gap between the outer periphery of the lower small diameter portion 24b and the inner periphery of the lower small diameter hole 20Cb And the lower surface of the upper large-diameter portion 24a opposed to the stepped portion (upper stepped surface) between the upper large-diameter hole 20Ca and the lower small-diameter hole 20Cb, as shown in an enlarged view in Fig. 6 (Opposite surface), an annular projection 24B having an acute angle at its tip is projected. (Particularly, a relatively low hardness) is generated by sliding the concave hole 20C (the inner wall surface of the upper large-diameter hole 20Ca) and the depressed portion 24 (the outer circumferential surface of the upper large-diameter portion 24a) The scraped residue of the body member 20A is accommodated and sealed in the debris-encapsulating portion 20P defined by the annular projection 24B and the outer peripheral corner of the bottom of the upper large-diameter hole 20Ca.

In the example shown in Fig. 6, the annular protrusion 24B for partitioning the scrap encapsulation portion 20P is formed on the upper large-diameter portion 24a of the depression portion 24 of the support member 20B. However, , As shown in Fig. 9 (A), the debris-encapsulating portion 20P is divided into a stepped surface (in the illustrated example, the inner end of the stepped surface) of the concave hole 20C of the body member 20A The annular projection 20D may be formed. As shown in Fig. 9 (B), for example, the stepped portion 24 of the depressed portion 24, which is formed by attaching an end thereof (the upper large-diameter portion 24a and the lower small-diameter portion 24b) The annular inclined face 24C is formed at the inner end of the annular inclined face 24C by abutting the annular inclined face 24C against the inner corner of the stepped portion of the concave hole 20C And the bottom outer circumferential corner of the upper large-diameter hole 20Ca of the concave hole 20C may divide the debris-sealing portion 20P.

The outer periphery of the lower small-diameter portion 24a of the depressed portion 24 (the outer periphery of the flange-shaped abutting portion 24c in the illustrated example) and the lower small-diameter hole 24C of the recessed hole 20C are not shown, (The lower small-diameter hole 20Cb) of the concave hole 20C (in other words, the lower small-diameter hole 20Cb is engaged with the lower small-diameter portion 24b) It is needless to say that an annular projection for partitioning the debris sealing portion 20P may be formed on the bottom surface of the lower small diameter portion 24a of the support member 20B facing the bottom surface .

It is needless to say that the control valve 2 of the second embodiment having such a configuration can achieve the same operational effects as the control valve 1 of the first embodiment.

≪ Third Embodiment >

10 is a longitudinal sectional view showing a main valve, an open / close valve, a closed state (under normal control) of the third embodiment of the control valve for a variable capacity compressor according to the present invention.

The control valve 3 of the third embodiment basically has a valve configuration different from that of the control valve 2 of the second embodiment. Although the control valve 3 of the third embodiment differs somewhat from the control valve 2 of the second embodiment in other configurations (for example, the configuration of an electronic actuator or the like), the description In order to avoid this, the constituent elements having the same functions as those of the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted (refer to, for example, Patent Document 1 for the detailed structure) , Only the difference points described above will be described in detail.

In the control valve 3 of the third embodiment, the main valve body 15 and the sub valve body 17 of the valve body 10 are integrally formed and the through hole And the valve body 10 is engaged with the plunger 37 such that the valve body 10 can not move up and down. When the plunger is moved upward (in the valve closing direction) by energization of the solenoid portion 30A of the electromagnetic actuator 30, the flange-shaped hanging portion 37k provided at the bottom of the plunger 37 moves upward Shaped engagement portion 15k of the valve body 10 and the valve body 10 is moved together with the plunger 37 when the valve body 10 is moved. Regarding the operation / action of the control valve 3, for example, refer to Patent Document 1 and the like.

In the control valve 3 according to the third embodiment of this configuration, the action and effect of the in-valve escape passage are not obtained, but the same effect as the control valves 1 and 2 of the first and second embodiments It is natural that the effect can be obtained.

1: Control valve for variable capacity compressor (first embodiment)
2: Control valve for variable capacity compressor (Second Embodiment)
3: Control valve for variable capacity type compressor (third embodiment)
10: Valve body
11: Main valve part
12:
15: Main valve body
15a: main valve body part
15k: flange-shaped engagement portion
16: escape passage in valve
17: Sub-valve body
17a: Sub-valve body portion (tapered portion)
19: Guide hole
19A: upper guide hole
19B: Lower guide hole
20:
20A: Body member
20B: Support member
20C: concave hole
20P: debris bag portion
21: Valve chamber
22: Valve hole
23:
25: Pd introduction port
26: Pc inlet / outlet
27: Ps In and Out
30: Electronic actuator
30A: solenoid portion
37: Plunger
37k: flange-shaped flange portion
37s: slit
37t: Patch Home
40: Bellows device (reduced pressure acting member)
45: Decompression chamber
50: valve closing spring
Lv: First lift amount
La: a fixed amount
Lp: second lift amount

Claims (10)

A Pd introduction port communicating with the discharge chamber of the compressor is provided on the upstream side of the valve chamber, and a crank chamber of the compressor is provided downstream of the valve chamber, An electromagnetic actuator having a valve body provided with a Pc inlet and outlet communicating with the chamber, a valve body for opening and closing the valve body, and a plunger for moving the valve body in the valve opening and closing direction, A pressure reducing chamber introduced through the Ps inlet and outlet and a depressurizing and stirring member for urging the valve body in the valve opening and closing direction in response to the pressure in the pressure reducing chamber,
Wherein the valve body has a guide member in which the valve body is slidably and freely slidable, a support member in which the valve member is formed, and a body member having the Ps inlet, the Pd inlet, and the Pc inlet and outlet formed therein, And the support member is inserted and fixed in the hole. The method according to claim 1,
Wherein the concave hole comprises an upper large-diameter hole and a lower small-diameter hole, and a depressed portion of the support member, which is inserted into the concave hole, includes an upper large-
Characterized in that the support member is inserted and fixed in the concave hole in such a posture that the upper large-diameter portion is fitted to the upper large-diameter hole and / or the lower-side small-diameter portion is fitted to the lower- Control valve for compressor. 3. The method of claim 2,
The support member is inserted and fixed in the concave hole in such a manner that the upper large diameter portion engages with the upper large diameter hole and a gap is provided between the inner periphery of the lower small diameter hole and the outer periphery of the lower small diameter portion,
And a lower hole communicating with the Pd inlet of the body member through the gap is formed in the lower small-diameter portion, and a lower hole of the lower small- valve. The method according to claim 1,
Wherein a debris-encapsulating portion for encapsulating the debris of the body member and / or the support member is provided between the body member and the support member. 5. The method of claim 4,
Wherein the debris-encapsulating portion is defined by an annular protrusion provided on a bottom surface of the concave hole or on an opposed surface of the support member facing the bottom surface of the concave hole. 5. The method of claim 4,
Characterized in that the debris encapsulating portion is defined by an upward step surface of the concave hole formed by attaching the step or an annular projection provided on the opposed surface of the support member facing the upward step surface of the concave hole, Control valve. The method according to claim 5 or 6,
And the tip end of the annular projection is formed at an acute angle. 5. The method of claim 4,
An inner periphery of the concave hole and an outer periphery of a scooped portion to be inserted into the concave hole of the supporting member are formed by being adhered,
Wherein the debris-encapsulating portion is defined by a ring-shaped inclined surface provided on a downward stepped surface of the insertion portion so as to contact an inner corner portion of an upper step surface of the concave hole. 9. The method according to any one of claims 1 to 8,
Wherein the support member is made of a material having a hardness higher than that of the body member. 10. The method of claim 9,
Wherein the support member is made of a stainless steel material, and the body member is made of an aluminum material, a crude oil material, or a resin material.

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