JP2007205248A - Control valve for variable displacement compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce labor hours and man-hours required for processing and assembly so as to reduce a manufacturing cost. <P>SOLUTION: There are provided: a power supply head 31 having a power connector part 31A; and a cylindrical housing 60 fitted to a coil 32 and the power supply head 31. An annular groove 75 for seal is formed in the outer peripheral part of the power supply head 31, and an O-ring 66 is loaded on the annular groove 75 for seal with a state where the O-ring 66 is compressed radially inward by the housing 60. An annular groove 76 for caulking is formed on an upper side of the annular groove 75 in the outer peripheral part of the power supply head 31 and an upper end part 62 of the housing 60 is pressed into the annular groove 76 to be caulked and fixed to the annular groove 76. The upper end part 62 of the housing 60 is formed in a trumpet shape at first so as not to damage a seal member such as an O-ring, and the upper end part 62 is pressed radially inward after the fitting and then is caulked and fixed in the annular groove 76. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a control valve for a variable displacement compressor used in a car air conditioner, and more particularly to a control valve for a variable displacement compressor that can reduce the manufacturing cost.

  In general, a control valve for a variable displacement compressor used in a car air conditioner or the like introduces a refrigerant having a discharge pressure Pd from a compressor (discharge chamber) in order to adjust a pressure Pc in a crank chamber of the compressor. The refrigerant having the discharge pressure Pd is squeezed out and led to the crank chamber, and the derivation amount (throttle amount) to the crank chamber is controlled according to the suction pressure Ps of the compressor. As seen in Patent Document 1 and the like, various proposals or practical applications using electromagnetic actuators (solenoids) have been made.

  A conventional example of such a variable displacement compressor control valve is shown in FIG. The illustrated control valve 5 includes a valve rod 15 having a valve body portion 15 a and a valve chamber 21 provided with a valve seat (valve port) 22 to which the valve body portion 15 a comes in contact with and separates from the outer periphery of the valve chamber 21. A discharge pressure refrigerant introduction port 25 with a plurality of filters 25A for introducing a refrigerant having a discharge pressure Pd from the compressor is provided in a portion (upstream side of the valve seat 22), and compressed below (downstream side) of the valve seat 22 The valve main body 20 provided with the refrigerant | coolant outlet 26 connected to the crank chamber of a machine, and the electromagnetic actuator 30 are provided.

  The electromagnetic actuator 30 includes a coil 32 for energization excitation, a power feeding head 31 ′ having a power connector portion 31 A attached to the upper side of the coil 32, a cylindrical stator 33 disposed on the inner peripheral side of the coil 32, A suction element 34 having a concave cross section that is press-fitted and fixed to the inner periphery of the lower end portion of the stator 33, a pipe 35 with a flange-shaped portion 35a whose upper end portion is joined to the outer periphery (step portion) of the lower end portion of the stator 33 by TIG welding, A plunger 37 disposed slidably in the vertical direction on the inner peripheral side of the pipe 35 below the suction element 34, and a stepped cylindrical housing 60 ′ fitted to the coil 32 and the power feeding head 31 ′. It has.

  Further, an adjusting screw 65 having a hexagonal hole is screwed onto the stator 33, and a suction pressure Ps of the compressor is interposed between the adjusting screw 65 and the suction element 34 on the inner peripheral side of the stator 33. Is formed in the pressure sensing chamber 45. The pressure sensing chamber 45 includes a bellows 41, a reverse convex upper stopper 42, a reverse concave lower stopper 43, and a compression coil. A bellows body 40 comprising a spring 44 is disposed, and further, a compression coil that urges the bellows body 40 and the suction element 34 in a direction in which the bellows body 40 contracts (a direction in which the bellows body 40 is compressed toward the adjustment screw 65). A spring 46 is disposed. Also, a stepped operating rod 14 that passes through the suction element 34 is disposed between the lower stopper 43 (reverse concave part thereof) of the bellows body 40 and the plunger 37 (recessed part 37c thereof). A valve-opening spring 47 made of a compression coil spring that biases the valve rod 15 downward (in the valve-opening direction) via the plunger 37 is disposed between the valve 34 and the plunger 37 (the recess 37b).

  On the other hand, a convex stopper portion 28 for restricting the lowest position of the plunger 37 protrudes from the upper center of the valve body 20, and the central portion above the valve chamber including the convex stopper portion 28 includes: A guide hole 19 into which the valve stem 15 is slidably fitted is formed. In addition, a suction pressure refrigerant introduction chamber 23 into which a refrigerant having a suction pressure of the compressor is introduced is formed between the plunger 37 and the upper outer periphery (outer periphery of the convex stopper portion 28) of the valve body 20. A plurality of suction pressure refrigerant introduction ports 27 are formed on the outer peripheral side, and the refrigerant having the suction pressure Ps introduced into the suction pressure refrigerant introduction chamber 23 from the suction pressure refrigerant introduction port 27 is formed in the vertical direction formed on the outer periphery of the plunger 37. Are introduced into the pressure-sensitive chamber 45 through the grooves 37a, 37a,... And the communication hole 37d formed in the central portion, the communication hole 39 formed in the suction element 34, and the like.

  A valve closing spring 48 made of a conical compression coil spring that urges the valve rod 15 upward is disposed at the lower part (refrigerant outlet 26) of the valve body 20. Due to the force, the upper end of the valve stem 15 is always in pressure contact with the plunger 37 (the communication hole 37d portion thereof).

  Further, a lower end flange 35a of the pipe 35 is placed on the upper end portion of the valve body 20 via an O-ring 57, and a short portion with a flange 56a is provided between the flange 35a and the coil 32. A cylindrical pipe holder 56 is interposed, and the flange portions 35 a and 56 a are fastened and fixed together by an upper end outer periphery caulking portion 29 of the valve body 20. Further, a bottom 61 'with a hole of the housing 60' is press-fitted and fixed to the upper end of the pipe holder 56.

  Further, an annular groove 72 for sealing is formed in the outer peripheral portion of the lower end of the power feeding head 31 ′, and an O-ring 66 as a sealing member is radially inwardly formed on the annular groove 72 for sealing by the inner peripheral surface of the housing 60 ′. The upper end portion 62 ′ of the housing 60 ′ is caulked and fixed on the flange-shaped portion 31c (the outer peripheral recess portion 31d) of the power feeding head 31 ′ (this portion will be described in detail later). ).

  A recess 31a is formed in the lower center portion of the feeding head 31 '. The recess 31a is formed with a protrusion 31b that fits into the hexagon hole 65a of the adjustment screw 65. The stator 33 and the recess 33a are formed in the recess 31a. The upper part of the adjustment screw 65 is inserted. Further, the power feeding head 31 ′ may be provided with a connector for connection without being provided with the connector portion 31 </ b> A, and the connector may be provided at the end thereof.

  In the control valve 5 having such a configuration, when the solenoid portion including the coil 32, the stator 33, and the attractor 34 is energized and energized, the plunger 37 is attracted to the attractor 34. Is moved upward (in the valve closing direction) by the urging force of the valve closing spring 48. On the other hand, the refrigerant having the suction pressure Ps introduced from the compressor to the suction pressure introduction port 27 communicates with the longitudinal grooves 37a, 37a,... Formed in the outer periphery of the plunger 37 from the introduction chamber 23 and the suction element 39. The bellows body 40 (inside the vacuum pressure) is expanded and contracted according to the pressure in the pressure sensitive chamber 45 (suction pressure Ps), and contracts and decreases when the suction pressure Ps is high. The displacement is transmitted to the valve stem 15 ′ via the actuating rod 14 and the plunger 37, whereby the valve opening degree (effective passage cross-sectional area between the valve seat 22 and the valve body portion 15a) is increased. Adjusted. That is, the opening degree of the valve includes the attraction force of the plunger 37 by the solenoid portion including the coil 32, the stator 33 and the attraction element 34, the urging force of the bellows body 40, the urging force by the valve opening spring 47 and the valve closing spring 48, According to the valve opening, the amount of discharge pressure Pd introduced from the discharge pressure refrigerant introduction port 25 into the valve chamber 21 to the refrigerant outlet 26 side, that is, the amount (throttle amount) to the crank chamber is adjusted. Thereby, the pressure Pc in the crank chamber is controlled.

  As shown in FIG. 6, the variable displacement compressor control valve 5 having the above configuration is assembled in a valve mounting hole (stepped hole) 80 formed in the vicinity of the swash plate chamber of the variable displacement compressor. A snap ring (C-shaped ring) 82 for retaining is attached to the upper part of the valve mounting hole 80, and this snap ring 82 is brought into contact with the upper end portion (caulking portion) 62 'of the housing 60'. Yes. Although not shown, the valve mounting hole 80 is connected to a Pd supply passage, a Pc supply passage, and a Ps supply passage, and the outer peripheral surface of the control valve 5 and the inner peripheral surface of the valve mounting hole 80 are connected to each other. O-rings 83, 84 and 85 are disposed at appropriate positions between the two.

  Next, the upper end portion (caulking portion) 62 ′ of the housing 60 ′ that is caulked and fixed to the power feeding head 31 ′ and related portions will be described.

  As shown in FIGS. 5 and 7, an inner diameter Da ′ is substantially equal to the outer diameter of the upper end portion of the coil 32, and the outer diameter Db is a thick wall corresponding to the hole diameter of the valve mounting hole 80. A portion 63 ′ is provided, and a conical taper portion 65 ′ having a larger diameter on the upper side is provided on the upper portion of the thick portion 63 ′ for convenience when the housing 60 ′ is fitted on the coil 32 and the power feeding head 31 ′. Is formed. That is, in order to fit (assemble) the housing 60 ′ to the coil 32 and the power feeding head 31 ′, the coil 32 and the power feeding head 31 are fixed and the housing 60 ′ is pushed in from below, or the housing 60 ′ In this case, when the upper end surface of the housing 60 'is flat (horizontal), it protrudes from the sealing annular groove 72 (not yet compressed). There is a risk of being caught by the O-ring 66 ′ (naturally attached state) and being damaged. Therefore, a conical taper portion 65 ′ is formed on the upper portion of the thick wall portion 63 ′ so that it can be smoothly compressed (guided) without damaging the O-ring 66 ′. In the above, a caulking portion (upper end portion) 62 'that is initially standing straight is continuously provided. In addition, the inclination angle α and the length (size) of the conical taper portion 65 ′ are set according to the substantially circular cross-sectional outer diameter of the O-ring 66 ′.

  When the coil 32 and the power feeding head 31 ′ are fitted into the housing 60 ′ by, for example, being pushed in from above, as shown in FIG. 7A, an O-ring 66 ′ is applied to the conical taper portion 65 ′. Even after the contact, the pressing continues until the flange 31a (lower inclined surface) comes into contact with the conical taper portion 65 ′. As a result, as shown in FIG. 7B, the O-ring 66 ′ is gradually compressed radially inward while being guided by the conical taper portion 65 ′, and then the cylindrical inner portion of the housing 60 ′. It is also pressed against the peripheral surface and further compressed radially inward, and is almost completely pushed into the sealing annular groove 72. In this way, the O-ring 66 ′ loaded in the sealing annular groove 72 in a compressed state hermetically seals between the power feeding head 31 ′ and the housing 60 ′, and the required sealing performance is ensured. The

Then, after the flange portion 31a (lower inclined surface) is pushed into the conical taper portion 65 ′, the caulking portion (upper end portion) 62 ′ of the housing 60 ′ that rises straight is connected to the feeding head 31 ′. It is caulked and fixed on the flange-shaped part 31c (the outer peripheral recessed part 31d). In this case, as described above, when the snap ring 82 for retaining is received (clamped and retained) by the caulking portion 62 ′ when it is mounted in the valve mounting hole 80, the fixing stability of the control valve 5 is fixed. In order to secure this, it is necessary to lay the caulking part (upper end part) 62 'horizontally (flat). Therefore, when caulking and fixing the upper end portion 62 ′, as shown in FIG. 7B, the first caulking jig 93 having the inclined pressing surface 93a is lowered from above and the caulking portion (upper end portion) 62 is placed. 'Is inclined (squeezed) to the radially inward side to a certain extent, and then the second caulking jig 94 having a flat pressing surface 94a parallel to the horizontal surface is lowered from above and caulked (upper end) Caulking 62 'to lie parallel to the horizontal plane.
Japanese Patent Laid-Open No. 2003-166667

  However, the conventional variable displacement compressor control valve 5 as described above has the following problems to be improved.

  (1) A thick-walled portion 63 ′ is formed in the housing 60 ′ in order to provide a conical taper portion 65 ′ for preventing damage to the O-ring. In addition to forging, etc., cutting is required, increasing the manufacturing cost.

  (2) Since it is necessary to arrange the caulking jigs 93 and 94 above the housing, as shown in FIG. 7C, caulking treatment is performed between the power connector portion 31A of the power feeding portion and the caulking portion 62 ′. The working space S of the tools 93 and 94 is required, and restrictions are imposed on the shape of the power feeding head 31 and the like, and there is a dislike that the total length of the control valve becomes long.

  (3) Since the portion to be retained and locked by the snap ring 82 is the caulking portion (upper end portion) 62 ', it is necessary to lay the caulking portion (upper end portion) 62' horizontally (flat). Thus, the caulking jig must be replaced and the caulking process must be performed in two stages. As a result, it takes time and man-hours.

  The present invention has been made in view of the above circumstances, and the object of the present invention is to reduce the labor and man-hours required for processing and assembly of the housing and the like as much as possible, and to impose great restrictions on the dimensional shape of each part. It is an object of the present invention to provide a control valve for a variable displacement compressor that can keep the manufacturing cost low without being produced.

  In order to achieve the above object, a control valve for a variable displacement compressor according to the present invention basically includes an electromagnetic actuator for driving a valve stem in a valve opening / closing direction, and a coil in the electromagnetic actuator. And a cylindrical housing that fits over the coil and the base of the power feeding unit.

  An annular groove for sealing is formed on the outer peripheral portion of the base of the power feeding section, and a sealing member such as an O-ring is loaded in the annular groove for sealing in a state compressed radially inward by the housing, In addition, a caulking annular groove is formed above the sealing annular groove on the outer peripheral portion of the base of the power feeding unit, and the upper end of the housing is pushed into the caulking annular groove from the side to be caulked and fixed. It is characterized by being.

  In a preferred aspect, the upper end portion of the housing is initially formed in a trumpet shape so as not to damage the sealing member such as the O-ring when the coil and the base portion of the power feeding portion are fitted. After the fitting, it is pressed inward in the radial direction and fixed by caulking in the caulking annular groove.

  In another preferable aspect, the thickness of the housing is substantially uniform throughout.

  In a more specific aspect, the valve rod having a valve body portion and a valve chamber provided with a valve port for contacting and separating the valve body portion, a refrigerant having a discharge pressure from a compressor upstream of the valve port. And a valve main body provided with a refrigerant outlet communicating with the crank chamber of the compressor downstream of the valve port and driving the valve rod in the valve port opening / closing direction. An electromagnetic actuator for driving, a pressure-sensitive response member that drives the valve rod in a valve opening / closing direction in response to a suction pressure of the compressor, and a power feeding unit that is attached to an upper side of a coil in the electromagnetic actuator, A cylindrical housing that fits the base of the coil and the power feeding part, and a sealing annular groove is formed in the outer periphery of the base of the power feeding part, and a sealing member such as an O-ring is formed in the sealing annular groove In the housing A caulking annular groove is formed in a compressed state on the radially inner side, and a caulking annular groove is formed above the sealing annular groove on a base outer peripheral portion of the power feeding portion, and the caulking annular groove The upper end of the housing is pushed in and fixed by caulking.

  Further, the assembly method according to the present invention includes an electromagnetic actuator for driving the valve stem in the valve opening / closing direction, a power feeding unit attached to the upper side of the coil in the electromagnetic actuator, the coil and the base of the power feeding unit And a sealing annular groove is formed in the outer peripheral portion of the base of the power feeding portion, and a sealing member such as an O-ring is radially inwardly formed in the sealing annular groove by the housing. And a caulking annular groove is formed above the sealing annular groove on the outer periphery of the base of the power feeding portion, and the upper end portion of the housing is placed in the caulking annular groove. A control valve for a variable displacement compressor that is pushed inward in a radial direction and fixed by caulking, wherein an upper end portion of the housing includes the coil and the power supply A trumpet is formed so as not to damage the sealing member such as the O-ring when the base portion is fitted, and the upper end portion is pressed radially inward after the fitting to the caulking. It is characterized by caulking and fixing in an annular groove.

  In the control valve for a variable displacement compressor according to the present invention, the upper end of the housing is formed in a trumpet shape before the housing is fitted to the coil and the power feeding portion, and this trumpet-shaped portion (conical taper portion) is formed. After being fitted, it is pressed inward in the radial direction so as to be caulked and fixed in the caulking annular groove, so that the sealing member such as the O-ring is not damaged when fitted, and the following effects are produced.

  (1) Since it is not necessary to provide a thick portion in the housing unlike the conventional one, the plate thickness of the housing can be made substantially uniform throughout. For this reason, the housing can be easily and simply manufactured only by pressing, and cutting is not required, so that the manufacturing cost can be reduced.

  (2) When the upper end portion of the housing is caulked, it is not necessary to dispose the caulking jig above the housing as in the prior art. In other words, the upper end portion (caulking portion) of the housing can be caulked from the side (side), so there is no need to secure a working space for the caulking jig between the power connector portion and the caulking portion of the power feeding portion, As a result, no restriction is imposed on the shape of the connector head or the like, and the overall length of the control valve can be kept short.

  (3) Since the portion that is retained and locked by the snap ring is not a conventional caulking portion, it is not necessary to lay the caulking portion (upper end portion) horizontally (flat). For this reason, it is not necessary to replace the caulking jig and to perform the caulking process in two steps as in the prior art (only once). As a result, labor and man-hours can be reduced.

  As a result, according to the present invention, it is possible to reduce the number of processing and assembly man-hours, and it is possible to keep the manufacturing cost low without imposing great restrictions on the size and shape of each part.

Hereinafter, embodiments of a control valve for a variable displacement compressor of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing an embodiment of a control valve for a variable displacement compressor according to the present invention.

  The control valve 1 of the illustrated embodiment is different from the control valve 5 of the conventional example shown in FIG. 4 described above except that the shape and configuration of the housing 60, the power feeding unit (power feeding head) 31, and the O-ring 66 are different. Are basically the same, therefore, for the control valve 1 of the present embodiment, the same reference numerals are assigned to the portions corresponding to the respective portions of the control valve 5 of the conventional example, and the duplicate description thereof is omitted. In the following, the differences will be described mainly.

  In the control valve 1 of the present embodiment, a sealing annular groove 75 is formed on the outer periphery of the base portion of the power feeding head 31, and an O-ring 66 serving as a sealing member is radially inward of the sealing annular groove 75 by the housing 60. It is loaded in a compressed state.

  A caulking annular groove 76 is formed above the sealing annular groove 75 in the outer periphery of the power feeding head 31, and an upper end portion (caulking part) 62 of the housing 60 is pushed into the caulking annular groove 76. It is fixed by caulking.

  In this case, the upper end portion 62 of the housing 60 is initially formed in a trumpet shape so as not to damage the O-ring 66 when fitted to the coil 32 and the power feeding head 31.

  That is, the housing 60 is manufactured by press working from a metal flat plate, and at the upper part thereof, as shown in FIGS. 2 and 3, the inner diameter Da is substantially equal to the outer diameter of the upper end of the coil 32, and the outer diameter Db. Is provided with an enlarged fitting portion 64 corresponding to the hole diameter of the valve mounting hole 80, and an upper end portion (caulking portion) 62 of the enlarged fitting portion 64 covers the housing 60 over the coil 32 and the power feeding head 31 ′. In order to facilitate the fitting (described above), a conical taper portion 65 is formed by opening it in a trumpet shape so as to increase in diameter toward the upper side (corresponding to a conventional conical taper portion 65 ′). The inclination angle α and the length (size) of the conical taper portion 65 are set according to the substantially circular cross-sectional outer diameter of the O-ring 66.

  Further, in the present embodiment, the lower end portion of the pipe 35 is fitted into the inner periphery of the holder 50 and connected and fixed by brazing, and the lower small diameter portion 61 of the housing 60 is press-fitted into the outer periphery of the holder 50. At the bottom of the holder 50, there is provided a cylindrical portion 50a with a thin flange that is fitted on the outer periphery of the upper portion of the valve body 20. The cylindrical portion 50a with a thin flange is attached to the valve body 20 by peel caulking or the like. It is fixed.

  When the housing 60 is fitted into the coil 32 and the power feeding head 31 by, for example, pressing from below, under the above configuration, as shown in FIG. 3A, the conical taper portion 65 ( Even after the O-ring 66 comes into contact with the upper end 62), until the caulking annular groove 76 reaches just beside the conical taper 65, that is, the upper stepped portion of the coil 32 is the lower end of the enlarged diameter fitting portion 64 in the housing 60. Continue to push until it touches the step.

  As a result, as shown in FIG. 3B, the O-ring 66 is gradually compressed radially inward while being guided by the conical taper portion 65, and subsequently on the cylindrical inner peripheral surface of the housing 60. Is also compressed further inward in the radial direction and is almost completely pushed into the sealing annular groove 75. Thus, the O-ring 66 loaded in the sealing annular groove 75 in a compressed state hermetically seals between the power feeding head 31 and the housing 60, and the required sealing performance is ensured.

  After the caulking annular groove 76 is positioned directly beside the conical taper portion 65, as shown in FIGS. 3B and 3C, the conical taper portion 65 (the upper end portion 62) is directly beside (sideward). ), The caulking jig 90 having a vertical pressing surface 90a and an inclined pressing surface 90b parallel to the vertical line is moved inward in the radial direction to press the conical taper portion 65, and the conical taper portion 65 (upper end) The part 62) is pushed inward in the radial direction, that is, in the caulking annular groove 75 without being laid down (in a standing position), and is fixed by caulking. In addition, as a caulking jig, a roller type can be used.

  In the control valve 1 of the present embodiment configured as described above, before the housing 60 is fitted on the coil 32 and the power feeding head 31, the upper end 62 thereof is opened in a trumpet shape to form a conical tapered portion 65, The conical taper portion 65 is pressed inward in the radial direction after being fitted and is caulked and fixed in the annular groove 75 for caulking, so that the O-ring 66 is not damaged at the time of fitting. There is an effect.

  (1) Since it is not necessary to provide the thick portion 63 ′ in the housing 60 unlike the conventional one, the plate thickness of the housing 60 can be made substantially uniform throughout. For this reason, the housing 60 can be easily and easily manufactured only by pressing, and cutting is not required, so that the manufacturing cost can be reduced.

  (2) When caulking the upper end portion 62 (conical taper portion 65) of the housing 60, it is not necessary to dispose the caulking jig above the housing 60 as in the prior art. That is, the upper end portion 62 (conical taper portion 65) of the housing 60 can be caulked from the side (side), so that it is caulked with the power connector portion 31A of the power feeding portion 31 as shown in FIG. It is no longer necessary to secure the working space S of the caulking jig between the upper portion 62 and the upper end portion 62. As a result, there is no restriction on the shape of the power feeding head 31, etc., and the overall length of the control valve is kept short. Can do.

  (3) Since the portion that is retained and locked by the snap ring 82 is not the conventional caulking portion 62 ′ but the power feeding head (shoulder portion) 31, the caulking portion (upper end portion) 62 is horizontal (flat). There is no need to lie down. For this reason, it is not necessary to replace the caulking jig and to perform the caulking process in two steps as in the prior art (only once). As a result, labor and man-hours can be reduced.

  As a result, in the manufacture of the control valve 5, the number of processing and assembly steps can be reduced, and the manufacturing cost can be kept low without imposing great restrictions on the dimensional shape of each part.

The longitudinal section showing one embodiment of the control valve for variable capacity type compressors concerning the present invention. The partial notch side view which shows the coil and electric power feeding head (A) and housing (B) before the assembly which are used for the control valve shown in FIG. The figure provided for description at the time of crimping and fixing a housing to a coil and a feed head in the control valve shown in FIG. The longitudinal cross-sectional view which shows an example of the conventional control valve for variable displacement compressors. The partial notch side view which shows the coil before the assembly used for the control valve shown by FIG. 4, a feed head (A), and a housing (B). The figure which shows the state which incorporated the control valve shown by FIG. 4 in the valve mounting hole of a compressor. The figure provided for description at the time of crimping and fixing a housing to a coil and a feed head in the control valve shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Control valve 14 for variable capacity type compressors Actuating rod 15 Valve rod 20 Valve body 21 Valve chamber 22 Valve port 30 Electromagnetic actuator 31 Feeding head 32 Coil 33 Stator 34 Suction element 35 Pipe 37 Plunger 40 Bellows body 60 Housings 62 and 65 Upper end part, conical taper part (caulking part)
66 O-ring (seal member)
75 Annular groove for sealing 76 Annular groove for caulking 80 Valve mounting hole 90 Caulking jig

Claims (5)

  An electromagnetic actuator for driving the valve stem in the valve opening / closing direction, a power supply unit attached to the upper side of the coil in the electromagnetic actuator, and a cylindrical housing for fitting the coil and the base of the power supply unit An annular groove for sealing is formed on the outer peripheral portion of the base of the power supply unit, and a sealing member such as an O-ring is loaded in the annular groove for sealing in a state compressed radially inward by the housing, In addition, a caulking annular groove is formed above the sealing annular groove on the outer peripheral portion of the base of the power feeding unit, and the upper end of the housing is pushed into the caulking annular groove from the side to be caulked and fixed. A control valve for a variable displacement compressor, characterized by comprising:   The upper end portion of the housing is initially formed in a trumpet shape so as not to damage the sealing member such as the O-ring when the coil and the base of the power feeding portion are fitted. 2. The control valve for a variable displacement compressor according to claim 1, wherein the control valve is pressed inward in the radial direction and fixed in the caulking annular groove.   The control valve for a variable displacement compressor according to claim 1, wherein the housing has a substantially uniform plate thickness throughout.   A discharge pressure for introducing a refrigerant having a discharge pressure from a compressor upstream of the valve port, having a valve rod having a valve body portion and a valve chamber provided with a valve port for contacting and separating the valve body portion. A valve body provided with a refrigerant inlet and provided with a refrigerant outlet communicating with the crank chamber of the compressor downstream from the valve port; and an electromagnetic actuator for driving the valve rod in the valve port opening and closing direction; A pressure-sensitive response member that drives the valve stem in a valve opening / closing direction in response to a suction pressure of the compressor; a power supply unit that is attached to an upper side of the coil in the electromagnetic actuator; and the coil and the power supply unit A cylindrical housing for fitting the base portion, and an annular groove for sealing is formed in the outer peripheral portion of the base portion of the power feeding portion, and a seal member such as an O-ring is radially inwardly formed in the annular groove for sealing by the housing. Compressed to the side And a caulking annular groove is formed above the sealing annular groove on the outer peripheral portion of the base of the power feeding portion, and the upper end portion of the housing is pushed into the caulking annular groove. A control valve for a variable displacement compressor, which is fixed by caulking. An electromagnetic actuator for driving the valve stem in the valve opening / closing direction; a power supply portion attached to an upper side of the coil of the electromagnetic actuator; and a cylindrical housing for fitting the coil and a base portion of the power supply portion; An annular groove for sealing is formed on the outer peripheral portion of the base of the power feeding portion, and a sealing member such as an O-ring is loaded in the annular groove for sealing in a state compressed radially inward by the housing. In addition, a caulking annular groove is formed above the sealing annular groove on the outer peripheral portion of the base of the power feeding unit, and the upper end portion of the housing is pushed radially inward into the caulking annular groove. A method of assembling a control valve for a variable displacement compressor that is fixed by caulking,
The upper end portion of the housing is formed in a trumpet shape so as not to damage the sealing member such as the O-ring when the coil and the base of the power feeding portion are fitted, and the upper end portion is fitted after the fitting. A method of assembling a control valve for a variable capacity compressor, wherein the control valve is pressed inward in the radial direction and fixed in the caulking annular groove.

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