JP2019039377A - Variable capacity type compressor control valve - Google Patents

Abstract

To provide a variable capacity type compressor control valve that can prevent a foreign matter from being accumulated in a slide surface gap defined between a main valve element and a guide hole, whereby such a malfunction as valve lock or desertion of the main valve element hardly occurs.SOLUTION: In a variable capacity type compressor control valve, one or more main valve element-side grooves 10g extending from a part sliding through a guide hole 19 to the outside thereof are formed at an outer periphery of a main valve element 10 fitted into the guide hole 19. The main valve element-side groove 10g is constituted of a knurl processing groove.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a control valve for a variable capacity compressor used in a car air conditioner or the like, and in particular, a valve body caused by foreign matter flowing into a sliding surface gap formed between a valve body and a guide hole. The present invention relates to a control valve for a variable displacement compressor that is less likely to cause malfunction.

  In general, a control valve for a variable displacement compressor used in a car air conditioner or the like introduces a discharge pressure Pd from a discharge chamber of the compressor and regulates the discharge pressure Pd according to the suction pressure Ps of the compressor. Thus, the pressure Pc of the crank chamber is controlled, and normally, as can be seen in the following Patent Document 1, etc., the Ps inlet / outlet communicates with the valve chamber provided with the valve port and the suction chamber of the compressor. And a Pd introduction port communicating with the discharge chamber of the compressor is provided upstream from the valve port, and a Pc inlet / outlet communicating with the crank chamber of the compressor is provided downstream from the valve port. A valve body, a main valve body (valve rod) for opening and closing the valve port, an electromagnetic actuator having a plunger for moving the main valve body in the valve port opening and closing direction, and a suction pressure Ps from the compressor Through the Ps entrance A pressure sensing chamber to be introduced, is provided with a sensitive 圧応 rotary members of the bellows arrangement such that urges the main valve body the valve port opening and closing directions in response to pressure sensitive chamber, a.

  In addition to the above-described structure, the variable displacement compressor control valve described in Patent Document 2 below allows the crank chamber pressure Pc to escape to the compressor suction chamber via the Ps inlet / outlet. When the plunger is continuously moved upward from the lowest position by the suction force of the electromagnetic actuator, a sub-valve element for opening and closing the valve escape passage is provided. The sub-valve element moves together with the plunger with the valve escape passage closed, and the main valve element is moved upward so as to follow the sub-valve element. After the valve opening is closed by the body, when the plunger is further moved upward, the auxiliary valve body opens the in-valve escape passage.

JP 2010-185285 A JP 2013-130126 A

  By the way, in the conventional variable displacement compressor control valve described in Patent Documents 1 and 2, etc., the main valve body for opening and closing the valve port is slidably inserted into the guide hole provided in the valve body. Foreign matter (cutting scraps and abrasives remaining after machining assembly) in the clearance (clearance) of the sliding surface formed between the main valve body (outer circumferential surface) and the guide hole (inner wall surface) There is a possibility that malfunctions such as wear due to sliding friction, dust from the outside, etc. may become clogged and the main valve body will be difficult to move (valve lock, valve body leaving).

  The present invention has been made in view of the above circumstances. The object of the present invention is to prevent foreign matter from accumulating in the sliding surface gap formed between the main valve body and the guide hole. It is an object of the present invention to provide a control valve for a variable displacement compressor that can hardly cause malfunction such as lock and main valve body leaving.

  In order to achieve the above object, a control valve for a variable displacement compressor according to the present invention basically includes a main valve body having a main valve body portion, and a guide hole into which the main valve body is slidably inserted. And a valve chamber provided with a valve port for contacting and separating the main valve body and a Ps inlet / outlet communicating with the suction chamber of the compressor, and communicated with the discharge chamber of the compressor upstream of the valve port. A valve body provided with a Pd inlet and a Pc inlet / outlet communicating with the crank chamber of the compressor downstream from the valve port, and an electromagnetic for moving the main valve body in the valve opening / closing direction Actuator, a pressure sensing chamber into which suction pressure Ps is introduced from the compressor via the Ps inlet / outlet, and a feeling of urging the main valve body in the valve opening / closing direction according to the pressure in the pressure sensing chamber A pressure response member, and extends from the sliding portion with the guide hole to the outside of the outer periphery of the main valve body. It is characterized in that one or more of the main valve body groove is formed.

  In a preferred embodiment, the main valve body side groove is a knurled groove formed in a part or all of the outer periphery of the main valve body.

  In another preferred embodiment, the guide hole is provided between the Ps inlet / outlet and the Pd introduction port or the Pc inlet / outlet of the valve body, and the main valve body side groove is formed at an outer periphery of the main valve body. It is formed only on the Ps entry / exit side.

  In another preferred embodiment, the main valve body side groove is formed only on the Ps inlet / outlet side from an annular groove provided on the outer periphery of the main valve body.

  In another preferred embodiment, one or a plurality of guide hole side grooves having at least one end opened are formed in the guide hole.

  In another preferred aspect, the guide hole is provided between the Ps inlet / outlet and the Pd inlet / outlet of the valve body in the valve body, and the guide hole side groove is the Ps inlet / outlet of the guide hole. Only formed on the side.

  In another preferred embodiment, a valve escape passage for allowing the pressure Pc of the crank chamber to escape to the suction chamber of the compressor via the Ps inlet / outlet is provided in the valve body or the main valve body, and A sub-valve element for opening and closing the in-valve escape passage is provided.

  According to the present invention, the foreign matter flowing into the sliding surface gap (clearance) formed between the main valve body and the guide hole is discharged through the main valve body side groove formed on the outer periphery of the main valve body. This makes it easy to prevent foreign matter from accumulating in the gap between the sliding surfaces, thereby making it difficult to cause malfunctions such as valve locking and leaving the main valve body.

  The main valve body side groove is constituted by a knurled groove formed by knurling the outer periphery of the main valve body, and the main valve body side groove is formed by a relatively simple process on the main valve body. Since it can form, processing cost and processing man-hours can be held down.

  In addition, foreign matters that have flowed into the sliding surface gap (clearance) formed between the main valve body and the guide hole can be easily discharged through the guide hole side groove formed in the guide hole, and the sliding surface Since foreign matter can be prevented from accumulating in the gap, this also makes it possible to further prevent malfunctions such as valve lock and main valve body leaving.

  The guide hole side groove is provided between the Ps inlet / outlet and the Pd inlet / outlet and the Ps inlet / outlet, and is provided only on the Ps inlet / outlet side of the guide hole. Since it is discharged to the Ps inlet / outlet side through the guide hole side groove formed in the hole, the foreign matter flowing into the sliding surface gap can be efficiently discharged.

BRIEF DESCRIPTION OF THE DRAWINGS The longitudinal cross-sectional view which shows the state (at the time of normal control) of the main valve of the 1st Embodiment of the control valve for variable displacement compressors which concerns on this invention: Open and subvalve: Closed. BRIEF DESCRIPTION OF THE DRAWINGS The longitudinal cross-sectional view which shows the main valve of 1st Embodiment of the control valve for variable displacement type compressors which concerns on this invention: Closed, subvalve: Closed state (at the time of compressor starting transition (the 1)). The longitudinal cross-sectional view which shows the main valve of the 1st Embodiment of the control valve for variable displacement compressors which concerns on this invention: Closed, subvalve: The state (at the time of compressor starting transition (the 2)). BRIEF DESCRIPTION OF THE DRAWINGS The longitudinal cross-sectional view which shows the state (at the time of compressor starting) of the main valve of the 1st Embodiment of the control valve for variable displacement type compressors which concerns on this invention: Closed and a subvalve. The A section enlarged view of FIG. The B section enlarged view of FIG. FIG. 3 is a cross-sectional view taken along the line U-U in FIG. 1. It is a figure which shows the subvalve used for 1st Embodiment of the control valve for variable displacement compressors which concerns on this invention, (A) is a perspective view, (B) is a front view, (C) is a left view. , (D) is a top view, (E) is a bottom view, and (F) is a cross-sectional view taken along the line VV of (C). The enlarged view corresponding to the A section of FIG. 1 which shows the other example of the guide hole side groove | channel of the valve main body used for 1st Embodiment of the control valve for variable displacement compressors which concerns on this invention. The front view which shows the main valve body used for 1st Embodiment of the control valve for variable displacement compressors which concerns on this invention. The front view which shows the other example of the main valve body used for 1st Embodiment of the control valve for variable displacement compressors which concerns on this invention. The longitudinal cross-sectional view which shows the state (at the time of normal control) of the main valve of the 2nd Embodiment of the control valve for variable displacement compressors which concerns on this invention: Open and a subvalve. The longitudinal cross-sectional view which shows the state (at the time of a compressor starting transition) of the main valve of the 2nd Embodiment of the control valve for variable displacement type compressors which concerns on this invention: Closed and a subvalve. The longitudinal cross-sectional view which shows the main valve of the 2nd Embodiment of the control valve for variable displacement type compressors which concerns on this invention: Closed and a subvalve: An open state (at the time of compressor starting). The C section enlarged view of FIG. The D section enlarged view of FIG. Sectional drawing which follows the XX arrow line of FIG. The enlarged view corresponding to the A section of Drawing 1 showing other examples of a 1st embodiment of a control valve for variable capacity type compressors concerning the present invention. The enlarged view corresponding to the C section of Drawing 12 showing other examples of a 2nd embodiment of the control valve for variable capacity type compressors concerning the present invention.

  Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment>
1 to 4 are longitudinal sectional views showing a first embodiment of a control valve for a variable displacement compressor according to the present invention. FIG. 1 is a state in which a main valve is open and a sub valve is closed (normal control). 2 and FIG. 3 show the main valve: closed, the sub valve: closed (when the compressor starts up), and FIG. 4 shows the main valve: closed, sub valve: open (when the compressor starts). ing. 5 is an enlarged view of part A in FIG. 1, FIG. 6 is an enlarged view of part B in FIG. 2, and FIG. 7 is a cross-sectional view taken along the line U-U in FIG.

  In the present specification, descriptions representing positions and directions such as up and down, left and right, and front and rear are given for convenience in accordance with the drawings in order to avoid complicated explanation, and are actually incorporated in the compressor. It does not necessarily indicate the position and direction at.

  In each drawing, the gap formed between the members, the separation distance between the members, etc. are larger than the dimensions of each constituent member for easy understanding of the invention and for convenience of drawing. Or it may be drawn small.

[Configuration of Control Valve 1]
The control valve 1 of the illustrated embodiment basically includes a valve body 20 provided with a valve port 22, a main valve body 10 for opening and closing the valve port 22, and a valve valve opening / closing direction ( An electromagnetic actuator 30 for moving in the vertical direction) and a bellows device 40 as a pressure-sensitive response member are provided.

  The electromagnetic actuator 30 includes a bobbin 38, a coil 32 for energizing energization provided on the bobbin 38, a stator 33 and an attractor 34 disposed on the inner peripheral side of the coil 32, and lower ends of the stator 33 and the attractor 34. A guide pipe 35 whose upper end is joined to the outer periphery (step part) by welding, and a bottomed cylindrical plunger disposed below the suction element 34 and slidably in the vertical direction on the inner peripheral side of the guide pipe 35 37, a cylindrical housing 60 extrapolated to the coil 32, a connector portion 31 attached to the upper side of the housing 60 via an attachment plate 39, and a lower end portion of the housing 60 and a lower end portion of the guide pipe 35 And a holder 29 for fixing them to the upper part of the valve main body 20 (the main body member 20A). In this example, a cylindrical suction element 34 in which an insertion hole 34a having a diameter smaller than the inner diameter of the stator 33 is formed in the center (along the axis O) is formed integrally with the lower inner periphery of the cylindrical stator 33. Has been. Here, the part which consists of the coil 32, the stator 33, the attractor 34, etc. except the plunger 37 among the electromagnetic actuators 30 is called solenoid part 30A.

  On the upper part of the stator 33, an adjusting member in which a male screw portion 65a formed on the outer periphery of an adjusting screw 65 with a hexagonal hole is screwed into a female screw portion 64a formed on the inner periphery of a cylindrical holding member 64. 61 is provided. In the adjustment member 61, the lower half of the adjustment screw 65 is fitted into the lower half of the holding member 64 (with an O-ring 62 as a sealant interposed therebetween) and the adjustment screw 65 A male screw portion 65 a provided on the upper outer periphery is screwed to a female screw portion 64 a provided on the upper inner periphery of the holding member 64. The adjustment member 61 is inserted through a fitting insertion hole 31 a provided substantially through the center of the connector portion 31 and a center hole 39 a provided substantially at the center of the mounting plate 39, and protrudes from the lower outer periphery of the holding member 64. The flange portion 64b and the ring-shaped pressing member 63 fitted in the upper outer periphery (a fitting groove formed in the upper portion) cooperate to be held and fixed to the connector portion 31 and the mounting plate 39 (not vertically movable). The lower end portion (the portion below the flange portion 64b) of the holding member 64 is disposed (interpolated) on the inner peripheral side of the upper end portion of the stator 33.

  Between the adjusting member 61 (the adjusting screw 65 and the holding member 64) and the suction element 34 on the inner peripheral side of the stator 33, a pressure sensitive chamber 45 into which the suction pressure Ps of the compressor is introduced is formed. A bellows device 40 comprising a bellows 41, a reverse convex upper stopper 42, a reverse concave lower stopper 43, and a compression coil spring 44 is disposed in the pressure sensitive chamber 45 as pressure sensitive response members. . Further, a stepped rod-like push rod 46 as a thrust transmission member is disposed along the axis O below the bellows device 40. The center of the push rod 46 has a large diameter (large diameter portion 46b), and the upper end portion 46d of the push rod 46 is fitted and supported in the recess of the lower stopper 43, and the insertion hole 34a of the suction element 34 is supported. Further, the upper part of the push rod 46 and the large diameter part 46b are inserted (with a slight gap 38). The lower portion of the push rod 46 is inserted into a concave hole 17b of the interior member 17 having a concave cross section, which will be described later, and a lower end portion 46a thereof is inserted into a concave fitting insertion hole 17c formed at the center of the bottom of the concave hole 17b. It is inserted.

  An inner member 17 having a concave cross section having a vertically long concave hole 17b having substantially the same diameter as the insertion hole 34a of the suction element 34 is inserted and fixed to the plunger 37 by press fitting or the like. The interior member 17 has its upper end aligned with the upper end of the plunger 37 (in other words, its upper end is positioned on the inner periphery of the upper end of the plunger 37), and its lower end has a gap with the bottom of the plunger 37. In this state (as will be described in detail later), the flange-shaped locking portion 10k of the main valve body 10 is fitted in the plunger 37 in a state where there is a gap in which the main valve body 10 can be slightly moved up and down. A concave fitting insertion hole 17c into which the lower end 46a of the push rod 46 is fitted is formed in the center of the bottom of the concave hole 17b of the interior member 17.

  A stepped portion (downward-facing annular terrace surface) 46c formed on the upper portion of the large-diameter portion 46b of the push rod 46 and the bottom portion of the recessed hole 17b of the interior member 17 fitted in the plunger 37 (around the fitting insertion hole 17c) A plunger spring (valve opening spring) 47 formed of a cylindrical compression coil spring is mounted between the upper surface and the upper surface. The plunger spring 47 (compressive force) urges the plunger 37 downward (in the valve opening direction) via the interior member 17, and the bellows device 40 is moved inside the pressure sensitive chamber 45 via the push rod 46. Is retained.

  In addition, a slit 37 s extending linearly from the outer periphery to the center (on the axis O) is formed at the bottom of the plunger 37, and the slit 37 s is formed at a portion corresponding to the slit 37 s on the side of the plunger 37. A wider notch 37t is provided. The height (in the vertical direction) of the notch 37t is slightly larger than the height of the hook-shaped locking portion 10k of the main valve body 10, and the height (in the vertical direction) of the slit 37s (that is, the plunger 37). The thickness of the bottom part (height in the vertical direction) is slightly smaller than the height of the upper small diameter part 10 d of the main valve body 10, and the main valve body 10 can move up and down with respect to the plunger 37. (Details later). Further, the width (in the circumferential direction) of the notch 37t is slightly larger than the outer diameter of the hook-shaped locking portion 10k of the main valve body 10, and the width (in the lateral direction) of the slit 37s is assemblability. In consideration of the above, the outer diameter of the upper small diameter portion 10d of the main valve body 10 is slightly larger than the outer diameter of the hook-shaped locking portion 10k of the main valve body 10, and the bottom of the plunger 37 An outer peripheral portion of the slit 37s on the upper surface is an inner hook-shaped hooking portion 37k for hooking the hook-shaped locking portion 10k of the main valve body 10.

  Further, a portion corresponding to the slit 37s was cut out on the lower surface of the plunger 37 (specifically, a portion wider than the outer diameter of the intermediate fitting portion 10c of the main valve body 10 was cut out). ) A substantially C-shaped cylindrical leg portion 37a is projected (downward) in plan view. The cylindrical leg portion 37a is extrapolated (with a slight gap) to the intermediate fitting insertion portion 10c (the upper end portion thereof) of the main valve body 10, and the lower end portion of the sub-valve body 15 to be described later is disposed on the lower end portion thereof. An outer hook-shaped hooking portion 37j for hooking the hook-like locking portion 15j is projected (outwardly).

  In this example, a D-cut surface 37d is formed at a predetermined position on the outer periphery of the plunger 37 (in the illustrated example, a portion where the notch 37t and the slit 37s are formed), and the plunger 37 (the D-cut surface 37d thereof) is formed. ) And the guide pipe 35 are formed with a gap 36. Instead of the D-cut surface 37 d of the plunger 37, one or a plurality of vertical grooves may be formed, and the gap 36 may be formed between the outer periphery of the plunger 37 and the guide pipe 35.

  The main valve body 10 is made of, for example, metal and is formed of a stepped shaft-shaped solid member disposed along the axis O. The main valve body 10 includes, in order from the bottom, a main valve body portion 10a having a relatively large diameter, a lower small diameter portion 10b, an intermediate insertion portion 10c that is long in the vertical direction, an upper small diameter portion 10d, and a hook-shaped locking portion 10k. The annular groove 10A is provided in two stages, upper and lower, on the outer periphery of the lower part of the intermediate fitting portion 10c. The oil contained in the refrigerant flowing in the control valve 1 (oil for lubricating the compressor or the like) accumulates in the annular groove 10A, so that, for example, slidability and liquid tightness can be ensured and improved. .

  As described above, the intermediate fitting insertion portion 10c of the main valve body 10 (the upper end portion protruding upward from the guide hole 19) is inserted into the cylindrical leg portion 37a provided on the lower surface of the plunger 37, and has an upper small diameter. The portion 10d is loosely fitted into the slit 37s, and the hook-like locking portion 10k is located below the interior member 17 inside the plunger 37 (in other words, between the bottom of the plunger 37 and the lower end of the interior member 17). The inner space is loosely fitted. The hook-shaped locking portion 10k has a larger diameter than the width of the slit 37s, and when the plunger 37 is moved upward with respect to the main valve body 10, an inner hook-like shape formed by the outer peripheral portion of the slit 37s. The latching portion 37k is hooked on the hook-shaped latching portion 10k to be latched and latched. The intermediate insertion portion 10c has a larger diameter than the width of the slit 37s, and the outer peripheral portion of the slit 37s on the lower surface of the plunger 37 is the intermediate insertion portion 10c and the upper small diameter portion 10d of the main valve body 10. It can come into contact with the stepped part.

  On the other hand, the valve body 20 has a stepped cylindrical body member 20A in which a concave hole 20C for fitting is provided in the center of the upper portion and a small-diameter receiving hole 18 connected to the concave hole 20C is provided in the lower center. It has a two-part configuration with a cylindrical sheet member 20B that is inserted and fixed in the recessed hole 20C by press fitting or the like.

  The sheet member 20B is made of stainless steel (SUS), high-hardness brass material (brass whose hardness has been increased by reducing the lead content, etc.), and the like, and above the insertion portion 24 that is inserted into the concave hole 20C. In other words (in other words, so as to protrude from the insertion portion 24 toward the Ps entry / exit chamber 28), a stopper portion 24A for defining the lowest lowered position of the plunger 37 is provided. The lower end portion of the sheet member 20B (the fitting insertion portion 24) is brought into contact with a step portion (stepped portion) between the recessed hole 20C and the accommodation hole 18 of the main body member 20A. In addition, a guide hole 19 into which the intermediate fitting insertion portion 10c of the main valve body 10 is slidably fitted is inserted in the central portion of the seat member 20B so as to penetrate in the vertical direction (that is, along the axis O). The lower end portion of the guide hole 19 is a valve port 22 (valve seat portion) that is opened and closed by the main valve body portion 10 a of the main valve body 10. Here, the main valve part 11 is comprised by the main valve body part 10a and the valve port 22. FIG.

  Further, the seat member 20 </ b> B (and a cylindrical portion 15 b of the sub-valve body 15 to be described later) (the outer diameter thereof) has a smaller diameter than the plunger 37.

  The main body member 20A is made of, for example, aluminum, brass, resin, or the like, and the outer periphery of the stopper portion 24A (with the seating insertion portion 24) inserted into the concave hole 20C of the main body member 20A ( In other words, the Ps inlet / outlet chamber 28 for the suction pressure Ps of the compressor is formed on the upper end side of the sheet member 20B in the main body member 20A, and a plurality of Ps inlet / outlet chambers 28 (in the illustrated example, in the illustrated example). Two) Ps inlets / outlets 27 are formed. The suction pressure Ps introduced into the Ps inlet / outlet chamber 28 from the Ps inlet / outlet 27 is a gap 36 formed between the outer periphery of the plunger 37 and the guide pipe 35 (in this example, a gap formed by the D cut surface 37d). ), And is introduced into the pressure-sensitive chamber 45 through a gap 38 formed between the outer periphery of the push rod 46 and the suction element 34.

  In addition, in the center of the bottom portion of the recessed hole 20C of the main body member 20A, the guide hole 19 and the accommodation hole 18 larger in diameter than the main valve body portion 10a are provided continuously for accommodating the main valve body portion 10a of the main valve body 10. Has been. A valve closing spring comprising a conical compression coil spring between the bottom outer peripheral corner of the receiving hole 18 and a stepped portion (stepped portion) 10e provided on the lower outer periphery of the main valve body 10a of the main valve body 10. 50 is contracted, and the main valve body 10 (the stepped portion between the intermediate insertion portion 10c and the upper small diameter portion 10d) is pressed against the plunger 37 (the lower surface thereof) by the urging force of the valve closing spring 50. Here, the inside of the accommodation hole 18 (the lower part from the valve port 22 of the seat member 20 </ b> B) serves as the valve chamber 21.

  A plurality of Pd inlets 25 communicating with the discharge chamber of the compressor are opened in the concave hole 20C, and a ring-shaped filter member 25A is disposed on the outer periphery of the Pd inlet 25, and the concave The seat member 20B inserted into the hole 20C communicates with the Pd introduction port 25 through the fitting portion 24 (particularly, the portion below the portion where the intermediate fitting portion 10c of the main valve body 10 is inserted). A plurality of lateral holes 25 s that are continuous with the guide hole 19 are provided.

  Further, a lid-like member 48 functioning as a filter is fixed to the lower end portion of the main body member 20A by engagement, press-fitting or the like, and above the lid-like member 48 and below the accommodation hole 18 (in other words, the main body The lower end side of the sheet member 20B in the member 20A is a Pc entrance / exit chamber (entrance / exit) 26 that communicates with the crank chamber of the compressor. This Pc entrance / exit chamber (entrance / exit) 26 is configured such that the clearance between the valve chamber 21 → the valve port 22 and the main valve body 10a → the clearance between the lower portion of the guide hole 19 and the lower small diameter portion 10b → the insertion portion 24. The Pd inlet 25 communicates with the horizontal hole 25s.

  Further, in the present embodiment, a valve body communication passage 16A for communicating the Pc inlet / outlet chamber 26 and the Ps inlet / outlet chamber 28 is provided between the body member 20A and the seat member 20B in the valve body 20. .

  In detail, as can be understood by referring to FIGS. 5 to 7, the valve body 20 has a vertical opening with the lower end opened to the valve chamber 21 (and the Pc inlet / outlet chamber 26) on the outer periphery of the insertion portion 24 of the seat member 20 </ b> B. A groove 16b is formed, and an annular recess 16a continuous with the vertical groove 16b is formed in the upper inner periphery of the main body member 20A (in other words, the upper end portion of the recess hole 20C), and this (extends in the vertical direction). The longitudinal groove 16b and the (circumferential) annular recess 16a form a valve main body communication passage 16A that allows the Pc inlet / outlet chamber 26 and the Ps inlet / outlet chamber 28 to communicate with each other. The valve body internal communication passage 16A constitutes a part of the valve escape passage 16, and the upper end portion of the valve main body communication passage 16A (the upper end portion of the annular recess 16C) is the lower end portion of the sub valve body 15 ( The auxiliary valve body portion) 15a is an auxiliary valve seat portion 23 that contacts and separates (details will be described later).

  On the other hand, on the outer periphery of the stopper portion 24A protruding to the Ps inlet / outlet chamber 28 side of the seat member 20B, a sub-valve body 15 for opening and closing the valve relief passage 16 (valve body communication passage 16A) is vertically arranged. It is slidably distributed.

  The sub-valve body 15 is made of, for example, metal, and has a cylindrical portion 15b having a diameter substantially the same as that of the stopper portion 24A (the outer diameter thereof) that is slidably inserted into the stopper portion 24A. A lower end portion of the portion 15b is a sub-valve body portion 15a that opens and closes the in-valve escape passage 16 by making contact with and separating from the sub-valve seat portion 23, which is the upper end edge of the valve body communication passage 16A. Here, the auxiliary valve seat portion 23 is constituted by the auxiliary valve seat portion 23 and the auxiliary valve body portion 15a.

  A flange-like lower spring receiving portion 15c is projected (outward) at the lower end portion of the cylindrical portion 15a, and at the upper end portion (inner circumference) of the valve body 20 (the body member 20A). A flange-shaped upper spring receiving portion 20c is projected, and the sub-valve body 15 is moved downward (intra-valve escape passage 16 (valve in the valve body) between the lower spring receiving portion 15c and the upper spring receiving portion 20c. A valve closing spring 51 comprising an inverted conical compression coil spring urging in the valve closing direction (closing the passage 16A) is retracted.

  The upper end of the sub-valve body 15 (the cylindrical portion 15b) is positioned above the stopper portion 24A (the upper end) by a predetermined dimension. As can be understood with reference to FIG. A hook-like locking portion 15j for moving the auxiliary valve body 15 in conjunction with the plunger 37 into the upper end opening (the upper end portion on the side opposite to the auxiliary valve body portion 15a) of the body 15 (the cylindrical portion 15b). Projecting inward. Here, the hook-shaped locking portion 15j is provided at a portion of the upper end opening that is slightly semicircular. The hook-like locking portion 15j protrudes from the upper end opening of the cylindrical portion 15b toward the cylindrical leg portion 37a side of the plunger 37 that is externally inserted into the intermediate fitting insertion portion 10c of the main valve body 10. When 37 is moved upward with respect to the sub-valve body 15, the hook-like locking portion 15 j is hooked by the outer hook-like hooking portion 37 j of the plunger 37 (the cylindrical leg portion 37 a). It has come to be.

  In this embodiment, as described above, the Pc inlet / outlet chamber 26, the valve chamber 21, the valve body internal passage 16 </ b> A provided in the valve body 20, the Ps inlet / outlet chamber 28, etc. An in-valve escape passage 16 is formed to escape to the suction chamber of the compressor through the auxiliary valve body portion 27, and the auxiliary valve body portion of the auxiliary valve body 15 is connected to the auxiliary valve seat portion 23, which is the upper edge of the communication passage 16A in the valve body. The in-valve escape passage 16 is opened and closed when the lower end portion 15a is separated.

  When assembling the main valve body 10 and the sub-valve body 15 and the plunger 37, for example, the main valve body 10 is assembled in advance in the guide hole 19 of the valve body 20 (from the lower side) and the sub-valve is installed in the stopper portion 24A. After the body 15 is assembled (from the upper side), the hook-shaped locking portion 10k and the upper small-diameter portion 10d of the main valve body 10 are inserted into the notch 37t and the slit 37s of the plunger 37, respectively. An intermediate fitting insertion portion 10c of the main valve body 10 is disposed inside the cylindrical leg portion 37a from an open portion of the letter-shaped cylindrical leg portion 37a, and an open portion (a hook-like locking portion) of the upper end of the sub-valve body 15 The main valve body so that the cylindrical leg portion 37a is disposed on the upper end of the cylindrical portion 15b of the sub-valve body 15 and on the inner side of the hook-shaped locking portion 15j. 10 and sub valve body 10 The manager 37 is the lateral movement, the rear side of the slit 37s of the plunger 37 the upper small diameter portion 10d of the main valve body 10 (i.e., centered on axis O of the plunger 37) may be insert fitted into. Thereafter, the plunger 37 is rotated about 180 ° around the axis (center line) O (relative to the main valve body 10 and the sub-valve body 15 and the like), so that the outer hook-shaped hooking portion 37j of the plunger 37 is sub-valve. What is necessary is just to set it as the state (state shown by FIG. 1 etc.) which can be engaged with 15 hook-shaped latching | locking parts 15j.

  Here, in the control valve 1 of the present embodiment, as shown in FIGS. 1 and 5, the plunger 37, the main valve body 10, and the auxiliary valve body 15 are in the lowest lowered position (the lowermost end surface of the plunger 37. (That is, the lower end surface of the outer hook-shaped hooking portion 37j of the cylindrical leg portion 37a of the plunger 37 is in contact with the stopper portion 24A (the upper surface thereof), the main valve portion 11 is fully opened, and the subvalve portion 12 is fully closed.) , The vertical separation distance between the main valve body portion 10a of the main valve body 10 and the valve port 22 (valve seat portion) is defined as the first lift amount La, and the outer flange-like hooking portion 37j of the plunger 37 The separation distance between the auxiliary valve body 15 and the hook-shaped locking portion 15j is the second lift amount Lb (> La), and the inner hook-shaped hooking portion 37k of the plunger 37 and the hook-shaped locking portion 10k of the main valve body 10 are set. Is a predetermined amount Lx, and the maximum lift amount (third lift amount) L of the plunger 37 is (> Lb) (lift from the lowest position of the plunger 37 to the uppermost position) is set to the first lift amount La + predetermined amount Lx. That is, each separation distance is set so as to satisfy the relationship of Lx> Lb−La.

  Further, in addition to the above configuration, in the control valve 1 of the present embodiment, a sliding surface gap (between the intermediate fitting insertion portion 10c (outer periphery) of the main valve body 10 and the guide hole 19 (inner wall thereof) ( Clearance) is clogged with foreign matter (cutting scraps, abrasives, wear due to sliding friction, dust from the outside, etc.) remaining at the time of processing and assembly, etc., causing the main valve body 10 to stop moving (valve lock, valve body left behind), etc. The following measures have been taken in order to avoid malfunctions.

  That is, as can be understood by referring to FIGS. 5 to 7, the upper end (Ps inlet / outlet chamber 28 to Ps inlet / outlet) is formed in the upper half portion of the guide hole 19 (inner wall) of the valve main body 20 (the seat member 20B). A guide hole side groove 19g formed of a vertical groove whose end on the 27 side is open is formed. In the illustrated example, the lower end of the guide hole side groove 19g is located on the outer periphery of the lower portion of the main valve body 10 when the main valve body 10 is lifted to the highest position (main valve shown in FIGS. 2 to 4: closed state). The provided annular groove 10A (in the illustrated example, the upper annular groove) extends to a position where the annular groove 10A wraps and communicates with the annular groove 10A (see particularly FIG. 6). In the illustrated example, four guide hole side grooves 19g are provided at equiangular intervals around the axis O (that is, around the main valve body 10) (see particularly FIG. 7).

  The number of guide hole side grooves 19g may be one, or a plurality other than four. Further, the guide hole side groove 19g is, for example, in a direction inclined with respect to the axis O direction of the guide hole 19 in addition to the vertical groove extending in the axis O direction of the guide hole 19 (in other words, the moving direction of the main valve body 10). You may comprise by the formed inclined groove | channel or a helical groove | channel, and you may comprise by notches (refer FIG. 9), such as a cross-sectional triangle shape formed by notch processing (plastic processing). In this example, the guide hole side groove 19g is formed only on the upper side (Ps inlet / outlet 27 side) of the guide hole 19 from the horizontal hole 25s (Pd side) to the upper end (Ps side). For example, the guide hole side groove 19g may be formed over the entire range from the horizontal hole 25s (Pd side) to the upper end (Ps side). In the case where the guide hole side groove 19g is formed only on the upper side of the range, the clearance on the inlet side (Pd side) of the guide hole 19 remains small, so that it is possible to effectively prevent foreign matter from entering. Needless to say, the position and size of the guide hole side groove 19g can be changed as appropriate.

  On the other hand, as can be understood by referring to FIG. 10 together with FIGS. 1 to 7, the outer periphery of the intermediate fitting insertion portion 10 c of the main valve body 10, particularly above the annular groove 10 </ b> A provided on the lower outer periphery thereof. In this portion, a main valve body side groove 10g composed of knurled grooves (grooves formed by knurling) made of an eyelet is formed. That is, the main valve body side groove 10g is formed so as to extend from the sliding portion with the guide hole 19 to the outer side (upper side) of the intermediate fitting insertion portion 10c of the main valve body 10.

  The main valve body-side groove 10g may be constituted by a knurled groove made of a spiral having a plurality of (fine) longitudinal grooves in the circumferential direction instead of the knurled groove made of an eyelet (see FIG. 11). ). The main valve body side groove 10g is replaced with a knurled groove, for example, one or a plurality of vertical grooves extending in the direction of the axis O of the main valve body 10 (in other words, the moving direction of the main valve body 10), the main valve One or a plurality of inclined grooves or spiral grooves extending in a direction inclined with respect to the direction of the axis O of the body 10, a notch formed by notching (plastic processing), or the like may be used. Further, in this example, the main valve body side groove 10g is formed only on the upper side (Ps inlet / outlet 27 side) of the outer periphery of the intermediate fitting portion 10c of the main valve body 10, but for example, the main valve body side groove 10g In addition, it may be formed only on the lower side (Pd introduction port 25 or Pc inlet / outlet 26 side) of the outer periphery of the intermediate fitting part 10c of the main valve body 10, or the outer periphery of the intermediate fitting part 10c of the main valve body 10 It may be formed over the entire length (in the vertical direction). Needless to say, the position, size, range, and the like at which the main valve body side groove 10g is formed can be changed as appropriate.

[Operation of control valve 1]
Next, the operation of the control valve 1 configured as described above will be outlined.

  At the time of normal control (Pd → Pc control), the lift amount of the plunger 37 is set to be the first lift amount La slightly at the maximum, and at the time of starting the compressor (Pc → Ps control), the lift amount of the plunger 37 is increased. The amount is the third lift amount Lc.

  That is, during normal control (Pd → Pc control), when the solenoid portion 30A including the coil 32, the stator 33, the attractor 34, etc. is energized, the plunger 37 is attracted to the attractor 34, and this movement is caused. Following this, the main valve body 10 is moved upward (in the valve closing direction) by the urging force of the valve closing spring 50. On the other hand, the suction pressure Ps introduced from the compressor to the Ps inlet / outlet 27 is introduced from the Ps inlet / outlet chamber 28 into the pressure sensitive chamber 45 through the gap 36 between the outer periphery of the plunger 37 and the guide pipe 35, and the bellows. The device 40 (inside the vacuum pressure) expands and contracts (contracts when the suction pressure Ps is high and contracts when the pressure is low, and expands when the suction pressure Ps is low) in accordance with the pressure in the pressure sensing chamber 45 (suction pressure Ps). The valve opening (the separation distance between the valve port 22 and the main valve body 10a) is adjusted through the plunger 37, and the crank chamber is adjusted according to the valve opening. The pressure Pc is adjusted.

  In this case, the main valve body 10 is always urged upward by the urging force of the valve closing spring 50, and the hook-like locking portion 15j of the sub-valve body 15 is hooked on the outer hook-like hooking portion 37j of the plunger 37. Since the auxiliary valve body 15 is not always stopped (because Lb> La) and the auxiliary valve body 15 is always urged downward by the urging force of the valve closing spring 51, the auxiliary valve body part 15a is pressed against the auxiliary valve seat part 23. Thus, the in-valve escape passage 16 is blocked in the valve main body 20. Therefore, the crank chamber pressure Pc is not released to the suction chamber through the in-valve escape passage 16.

  On the other hand, when the compressor is started, the solenoid portion 30A is energized and energized, and the plunger 37 is attracted to the attractor 34. The main valve body 10 is moved upward following this upward movement, and the main valve body is moved. After the valve opening 22 is closed by the main valve body portion 10a, the plunger 37 is further moved upward, so that the sub-valve body 15 opens the valve escape passage 16, and the pressure in the crank chamber is increased. Pc is released to the suction chamber through the in-valve escape passage 16.

  Specifically, until the upward movement amount of the plunger 37 reaches the first lift amount La, the main valve body 10 moves in the valve closing direction so as to follow the upward movement of the plunger 37 by the biasing force of the valve closing spring 50. When it moves and the upward movement amount reaches the first lift amount La, the valve port 22 is closed by the main valve body portion 10a of the main valve body 10 (the state shown in FIG. 2). When the compressor is activated, the plunger 37 is further moved upward from the closed state of the main valve portion 11 (because the main valve body 10 remains stationary). Until the upward movement amount of the plunger 37 reaches the second lift amount Lb, the auxiliary valve body 15 remains in the closed state by the urging force of the valve closing spring 51 (the auxiliary valve body portion 15a is pressed against the auxiliary valve seat portion 23). It remains immobile. When the upward movement amount reaches the second lift amount Lb, the outer hook-shaped hooking portion 37j of the plunger 37 is locked to the hook-shaped locking portion 15j of the sub-valve body 15 (the state shown in FIG. 3). ). From this state, the plunger 37 is further moved by the amount corresponding to Lx− (Lb−La) until the inner hook-shaped hooking portion 37k of the plunger 37 is locked to the hook-shaped locking portion 10k of the main valve body 10. It is moved upward (state shown in FIG. 4). In other words, after the upward movement amount of the plunger 37 reaches the first lift amount La, the inner hook-shaped hooking portion 37k of the plunger 37 is locked to the hook-shaped locking portion 10k of the main valve body 10. The auxiliary valve body 15 is pulled up (from the valve body 20) by the amount of Lx− (Lb−La). In this case, while the main valve body 10 remains stationary, the sub-valve body portion 15a of the sub-valve body 15 is lifted from the sub-valve seat portion 23 by Lx- (Lb-La). Opens the relief passage 16 in the valve. When the inner hook-shaped latching portion 37k of the plunger 37 is locked to the hook-shaped locking portion 10k of the main valve body 10, even if the solenoid portion 30A generates a suction force, the plunger 37 and the sub-valve body 15 It cannot be raised any more.

  Thus, in the control valve 1 of the present embodiment, when the compressor is started, the crank chamber pressure Pc is released to the suction chamber through the in-valve escape passage 16, so that the discharge capacity is large when the compressor is started. The time required to become can be greatly reduced. Further, during normal control (Pd → Pc control), the valve relief passage 16 is closed by the sub-valve body 15, so that the operating efficiency of the compressor does not decrease.

  Further, in the control valve 1 of the present embodiment, the foreign matter flowing into the sliding surface gap (clearance) formed between the main valve element 10 (the intermediate fitting portion 10c thereof) and the guide hole 19 is Since it becomes easy to be discharged through the main valve body side groove 10g formed on the outer periphery of the valve body 10 (intermediate insertion portion 10c thereof) and foreign matter does not accumulate in the sliding surface gap, the valve lock, the main valve It is difficult to cause malfunction such as leaving the body.

  Further, the main valve element side groove 10g is constituted by a knurled groove formed by knurling the outer periphery of the main valve element 10 (the intermediate fitting portion 10c thereof), and is compared with the main valve element 10. Since the main valve body side groove 10g can be formed by simple and easy processing, the processing cost and the number of processing steps can be reduced.

  Further, in the control valve 1 of the present embodiment, the foreign matter flowing into the sliding surface gap (clearance) formed between the main valve body 10 (the intermediate fitting portion 10c thereof) and the guide hole 19 is guided by the guide. This facilitates discharge through the guide hole side groove 19g formed in the hole 19 and prevents foreign matter from accumulating in the gap between the sliding surfaces. It can be made difficult to occur.

  Further, the guide hole side groove 19g is provided between the Ps inlet / outlet 27 and the Pd inlet / outlet 25 or Pc inlet / outlet 26, and is provided only on the Ps inlet / outlet 27 side of the guide hole 19, and flows into the sliding surface gap. Since the foreign matter is discharged to the Ps inlet / outlet 27 side through the guide hole side groove 19g formed in the guide hole 19, the foreign matter flowing into the sliding surface gap can be efficiently discharged.

  In the above embodiment, the valve body 20 has a two-part configuration of the main body member 20A and the seat member 20B, and is formed on the inner periphery of the main body member 20 and the vertical groove 16b formed on the outer periphery of the seat member 20B in the valve body 20. The annular recess 16a forms a valve body communication passage 16A that constitutes a part of the valve escape passage 16. For example, the valve body communication passage 16A is formed on the seat member 20B side or the body member 20A side. Of course, the shape of the in-valve communication passage 16A is not limited to the above shape. Further, for example, the valve main body 20 may be formed as one part (not two parts of the main body member 20A and the seat member 20B), and a communication passage in the valve main body including a through hole or the like may be formed in the valve main body. .

  Needless to say, the location and shape of the sub-valve body 15 that opens and closes the in-valve escape passage 16, the coupling mechanism with the plunger 37, and the like can be changed as appropriate.

Second Embodiment
FIGS. 12 to 14 are longitudinal sectional views showing a second embodiment of the control valve for a variable displacement compressor according to the present invention. FIG. 12 shows a state where the main valve is open and the sub valve is closed (normal control). 13 shows the main valve: closed, sub valve: closed state (at the time of starting the compressor), and FIG. 14 shows the main valve: closed, sub valve: open (at the time of the compressor starting). 15 is an enlarged view of a portion C in FIG. 12, FIG. 16 is an enlarged view of a portion D in FIG. 13, and FIG. 17 is a sectional view taken along the line XX in FIG.

  The control valve 2 of the second embodiment is mainly a valve for releasing the pressure Pc of the crank chamber to the suction chamber of the compressor via the Ps inlet / outlet 27 with respect to the control valve 1 of the first embodiment described above. The difference is that the inner escape passage 16 is provided in the main valve body 10 (not in the valve main body 20), and other configurations are substantially the same. Therefore, the same reference numerals are given to portions having the same configurations and operational effects as the respective portions of the control valve 1 of the first embodiment, and the duplicate description will be omitted, and in the following, differences will be mainly described.

[Configuration of Control Valve 2]
In the control valve 2 of the illustrated embodiment, the cylindrical leg 37a provided on the lower surface of the plunger 37 in the control valve 1 of the first embodiment, the valve body communication passage 16A of the valve body 20, and the seat member of the valve body 20 The sub-valve body 15 having the cylindrical portion 15b that is externally inserted into the 20B (the stopper portion 24A) is omitted, and the interior member 17 that is inserted and fixed to the plunger 37 is used as the sub-valve body 17B. The sub-valve body 17B and the plunger 37 are together in a state where the sub-valve body (interior member) 17B is urged downward by the plunger spring 47 that is compressed between the stepped portion 46c in which the diameter portion 46b is formed. It is designed to move up and down. By this plunger spring 47 (compressive force thereof), the sub-valve element 17B is urged in a direction to close an in-valve escape passage 16 which will be described later, and the bellows device 40 is moved in the pressure sensitive chamber 45 via the push rod 46. Is retained.

  Further, in the present embodiment, the main valve element 10 disposed on the lower side of the sub-valve element 17B is made of, for example, a non-magnetic material, and penetrates in the longitudinal direction (axis O direction) in the center of the inside. A through relief hole 16B that constitutes a part of the in-valve escape passage 16 is provided.

  As described above, the sub-valve body 17B is inserted and fixed to the plunger 37 on the upper side of the main valve body 10, and its outer diameter (= inner diameter of the plunger 37) is a bowl-like shape of the main valve body 10. The lower end portion (flat surface) of the locking portion 10k is larger than the outer diameter of the locking portion 10k, and is brought into contact with and separated from the auxiliary valve seat portion (inverted truncated cone surface portion) 23 which is the upper end edge portion of the through escape hole 16B. The auxiliary valve body portion 17 a that opens and closes the escape passage 16 is provided.

  As described above, in the second embodiment, the Pc inlet / outlet chamber 26, the valve chamber 21, the through relief hole 16 </ b> B formed in the main valve body 10, the plunger 37, the Ps inlet / outlet chamber 28, etc. Is formed in the valve relief passage 16 through the Ps inlet / outlet 27 to the suction chamber of the compressor, and the sub-valve member is connected to the sub-valve seat portion 23 which is the upper edge of the through-relief hole 16B of the main valve member 10. The in-valve escape passage 16 is opened and closed by contacting and separating the sub-valve body portion (lower end portion) 17a of 17B.

  Here, in the control valve 2 of the present embodiment, as shown in FIG. 12, the plunger 37, the main valve body 10, and the sub-valve body 17B are in the lowest lowered position (the lowermost end surface of the plunger 37 is the stopper portion. 24A, the main valve portion 11 is fully open, and the sub-valve portion 12 is fully closed.) The vertical separation between the main valve body portion 10a of the main valve body 10 and the valve port 22 (valve seat portion). Is the first lift amount Ld, the separation distance between the inner hook-shaped hooking portion 37k of the plunger 37 and the hook-shaped locking portion 10k of the main valve body 10 is a predetermined amount Ly, and the maximum lift amount of the plunger 37 ( The second lift amount Le (the lift amount from the lowest position of the plunger 37 to the highest position) is the first lift amount Ld + the predetermined amount Ly.

  Furthermore, also in the control valve 2 of the second embodiment, as in the control valve 1 of the first embodiment described above, the intermediate fitting insertion portion 10c (outer periphery) of the main valve body 10 and the guide hole 19 (inner wall thereof) The main valve element 10 is clogged with foreign matter (cutting scraps, abrasives, wear due to sliding friction, dust from the outside, etc.) remaining in the clearance (clearance) formed between In order to avoid malfunction such as stoppage (valve lock, valve body leaving) and the like, a guide hole side groove 19g formed of a vertical groove is formed in the guide hole 19 (the upper portion thereof), and the intermediate fitting insertion portion 10c of the main valve body 10 is formed. (In the illustrated example) (in the illustrated example, a main valve body side groove 10g made of a knurled groove is formed in the upper part of the annular groove 10A provided on the outer periphery of the lower part (see particularly FIGS. 15 to 17). .

[Operation of control valve 2]
Next, the operation of the control valve 2 configured as described above will be outlined.

  At the time of normal control (Pd → Pc control), the lift amount of the plunger 37 (and the sub-valve body 17B) is set to be a little higher than the first lift amount Ld at the maximum, and when the compressor is started (Pc → Ps control) The lift amount of the plunger 37 (and the auxiliary valve body 17B) is set to the second lift amount Le.

  That is, during normal control (Pd → Pc control), when the solenoid portion 30A including the coil 32, the stator 33, the attractor 34, and the like is energized and excited, both the plunger 37 and the sub-valve element 17B are attracted to the attractor 34. The main valve body 10 is moved upward (in the valve closing direction) by the urging force of the valve closing spring 50 following this movement. On the other hand, the suction pressure Ps introduced from the compressor to the Ps inlet / outlet 27 is introduced from the Ps inlet / outlet chamber 28 into the pressure sensitive chamber 45 through the gap 36 between the outer periphery of the plunger 37 and the guide pipe 35, and the bellows. The device 40 (inside the vacuum pressure) expands and contracts (contracts when the suction pressure Ps is high and expands when the suction pressure Ps is low) according to the pressure of the pressure sensing chamber 45 (suction pressure Ps). 17B or the like is transmitted to the main valve body 10, thereby adjusting the valve opening (separation distance between the valve port 22 and the main valve body 15 a), and the crank chamber pressure is adjusted according to the valve opening. Pc is adjusted.

  In this case, the main valve body 10 is always urged upward by the urging force of the valve closing spring 50, and the sub valve body 17B is always urged downward by the urging force of the valve opening spring 47. The valve body 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 blocked in the main valve body 10. Therefore, the crank chamber pressure Pc is not released to the suction chamber through the in-valve escape passage 16.

  On the other hand, at the time of starting the compressor, the solenoid portion 30A is energized and energized, and the plunger 37 and the subvalve body 17B are attracted (upward) to the attractor 34, and the main valve body 10 follows this upward movement. Is moved upward, and the valve port 22 is closed by the main valve body portion 10a of the main valve body 10, and then the plunger 37 and the sub-valve body 17B are further moved upward, whereby the sub-valve body 17B. Is opened in the valve relief passage 16, and the pressure Pc in the crank chamber is released to the suction chamber through the valve relief passage 16.

  In detail, until the upward movement amount of the plunger 37 (and the sub-valve body 17B) reaches the first lift amount Ld, the main valve body 10 is moved by the biasing force of the valve-closing spring 50 to move the plunger 37 and the sub-valve body 17B. When the valve travels in the valve closing direction so as to follow the upward movement and the upward movement amount reaches the first lift amount Ld, the valve port 22 is closed by the main valve body portion 10a of the main valve body 10 (FIG. 13), the plunger 37 and the auxiliary valve body 17B are further moved upward by the predetermined amount Ly from the closed state of the main valve portion 11 (the state shown in FIG. 14). In other words, after the upward movement amount of the plunger 37 and the sub-valve body 17B reaches the first lift amount Ld, the inner hook-shaped hooking portion 37k of the plunger 37 becomes the hook-shaped locking portion 10k of the main valve body 10. The sub-valve body 17B is pulled toward the suction element 34 side together with the plunger 37 by the predetermined amount Ly until it is locked (first lift amount Ld + predetermined amount Ly = second lift amount Le). In this case, since the main valve body 10 remains stationary while being closed, the sub-valve body portion 17a of the sub-valve body 17B is lifted by a predetermined amount Ly from the sub-valve seat portion 23, and thereby the in-valve escape passage. 16 is opened. When the inner hook-shaped latching portion 37k of the plunger 37 is locked to the hook-shaped locking portion 10k of the main valve body 10, even if the solenoid portion 30A generates a suction force, the plunger 37 and the sub-valve body 17B It cannot be raised any more.

  Of course, in the control valve 2 of the present embodiment having such a configuration, the same operational effects as those of the control valve 1 of the first embodiment described above can be obtained. For the detailed structure of the control valve 2 of the second embodiment, refer to Japanese Patent Application No. 2006-127978 by the present inventors, if necessary.

  In the first and second embodiments, the guide hole side groove 19g is formed in the guide hole 19, and the main valve body side groove 10g is formed in the intermediate fitting insertion portion 10c of the main valve body 10, but FIG. Of course, as shown in FIG. 19, the main valve body side groove 10g may be formed only in the intermediate insertion portion 10c of the main valve body 10.

1 Control valve for variable displacement compressor (first embodiment)
2 Control valve for variable displacement compressor (second embodiment)
DESCRIPTION OF SYMBOLS 10 Main valve body 10a Main valve body part 10b Lower small diameter part 10c Intermediate fitting insertion part 10d Upper small diameter part 10k Hook-shaped latching | locking part 10g Main valve body side groove | channel 10A Annular groove 11 Main valve part 12 Sub valve part 15 Sub valve body 15a Sub Valve body portion 15b Tubular portion 15j Hook-like locking portion 16 In-valve escape passage 16a Annular recess 16b Vertical groove 16A In-valve communication passage 16B Through escape hole (second embodiment)
17 Interior member 17B Sub-valve (second embodiment)
18 receiving hole 19 guide hole 19g guide hole side groove 20 valve main body 20A main body member 20B seat member 20C concave hole 21 valve chamber 22 valve port 23 sub valve seat part 24 fitting part 24A stopper part 25 Pd introduction port 25s side hole 26 Pc in / out Room (entrance / exit)
27 Ps inlet / outlet 28 Ps inlet / outlet chamber 30 Electromagnetic actuator 30A Solenoid part 32 Coil 33 Stator 34 Suction element 37 Plunger 37a Cylindrical leg part 37j Outer hook-like hook part 37k Inner hook-like hook part 37s Slit 37t Notch 40 Bellows Device (Pressure-sensitive response member)
45 Pressure sensing chamber 46 Push rod 50 Valve closing spring 51 Valve closing spring

Claims (7)

A main valve body having a main valve body portion;
A guide hole into which the main valve body is slidably inserted, a valve chamber provided with a valve port for contacting and separating the main valve body portion, and a Ps inlet / outlet communicating with a suction chamber of the compressor, A valve main body provided with a Pd introduction port communicating with the discharge chamber of the compressor upstream from the valve port, and provided with a Pc inlet / outlet communicating with the crank chamber of the compressor downstream from the valve port;
An electromagnetic actuator for moving the main valve body in a valve opening / closing direction;
A pressure sensitive chamber into which suction pressure Ps is introduced from the compressor through the Ps inlet / outlet;
A pressure-sensitive response member that urges the main valve body in a valve opening / closing direction according to the pressure in the pressure-sensitive chamber,
A control valve for a variable displacement compressor, wherein one or a plurality of main valve body side grooves extending from a sliding portion with the guide hole to the outside thereof are formed on an outer periphery of the main valve body.   2. The control valve for a variable displacement compressor according to claim 1, wherein the main valve body side groove is a knurled groove formed in a part or all of the outer periphery of the main valve body.   The guide hole is provided between the Ps inlet / outlet and the Pd introduction port or the Pc inlet / outlet in the valve body, and the main valve body side groove is formed on the Ps inlet / outlet side of the outer periphery of the main valve body. The control valve for a variable capacity compressor according to claim 1 or 2, wherein only the control valve is formed.   The control valve for a variable displacement compressor according to claim 3, wherein the main valve body side groove is formed only on the Ps inlet / outlet side from an annular groove provided on an outer periphery of the main valve body. .   The control valve for a variable displacement compressor according to any one of claims 1 to 4, wherein the guide hole is formed with one or a plurality of guide hole side grooves having at least one open end. .   The guide hole is provided between the Ps inlet / outlet and the Pd inlet / Pc inlet / outlet of the valve body, and the guide hole side groove is formed only on the Ps inlet / outlet side of the guide hole. The control valve for a variable displacement compressor according to claim 5, wherein   An in-valve escape passage is provided in the valve body or the main valve body for allowing the pressure Pc of the crank chamber to escape to the suction chamber of the compressor through the Ps inlet / outlet, and the in-valve relief passage is opened and closed. A control valve for a variable displacement compressor according to any one of claims 1 to 6, wherein a sub-valve element is provided.

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