JP2009299674A - Control valve unit and connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simultaneously attain the standardization of a control valve received in a mounting hole of an object device and the cost reduction of a seal structure of its mounting section. <P>SOLUTION: In a control valve unit in some embodiment, the control valve 1 and a connector 101 are detachably constituted and therefore the control valve 1 has a possibility that it can be continuously used even if the specification of the connector 101 is changed. On the other hand, when the control valve 1 is assembled into the mounting hole 152 of a compressor housing 150, the connector 101 itself functions as a seal member. The connector housing 102 serves also as a sealing member of the mounting hole 152 and sure seal is given by an O-ring 115 fitted to its outer peripheral surface. The connector housing 102 itself is composed of a corrosion resistant member. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a control valve unit that includes a control valve that is assembled to a target device and controls the flow rate of a working fluid, and a connector that is connected to supply power to the control valve.

  In general, an apparatus that performs control using the pressure of a working fluid uses an electromagnetic valve that opens and closes an internal fluid passage in order to control the flow of the working fluid. For example, a variable capacity compressor (also simply referred to as a “compressor”) capable of varying the refrigerant discharge capacity is used in an automotive air conditioner so that a constant cooling capacity is maintained regardless of the engine speed. There are some, and a solenoid-driven control valve is used to control the capacity of the compressor (see, for example, Patent Document 1).

  In this compressor, a piston for compression is connected to a swing plate attached to a rotary shaft that is driven to rotate by an engine, and the discharge amount of the refrigerant is changed by changing the stroke of the piston by changing the angle of the swing plate. adjust. The angle of the swing plate can be continuously changed by introducing a part of the discharged refrigerant into the sealed crank chamber and changing the balance of pressure applied to both surfaces of the piston. The control valve controls at least one of a refrigerant flow rate introduced from the discharge chamber into the crank chamber and a refrigerant flow rate led out from the crank chamber to the suction chamber to change the discharge capacity of the compressor.

The power supply to the control valve is performed by connecting a harness or the like drawn from the solenoid to an external power source, or by connecting a connector of the external power source to a connector portion provided integrally with the solenoid.
JP 2003-328936 A

  By the way, from the recent trend of standardization of parts, it is preferable that parts can be shared as much as possible even in such a control valve, and the changed parts can be reduced as much as possible even when the product specifications are different. For example, it is preferable that a common configuration can be continuously used as the control valve even if the specifications of the connector for connecting the external power supply and the control valve are different.

  Further, since most of such control valves are made of metal, high corrosion resistance such as rust prevention is required. For this reason, the surface of the metal part may be subjected to rust prevention treatment such as plating, or an alloy having high corrosion resistance such as stainless steel may be employed. However, it is not preferable that the manufacturing cost increases. Therefore, as disclosed in Patent Document 1, a configuration in which most of the control valve is accommodated in the housing of the compressor and a configuration that is not exposed to the external atmosphere is being adopted. However, in such a configuration, it is necessary to provide a relatively large mounting hole for accommodating the control valve in the housing of the compressor, and the area where the external atmosphere should be prevented from entering the mounting hole is also enlarged. For this reason, the device which does not raise a cost for the seal structure is also required.

  Such a problem occurs not only in the control valve of the variable capacity compressor but also in the control valve accommodated in the mounting hole formed in the housing of the target device in order to control the flow rate of the working fluid. sell.

  The present invention has been made in view of such problems, and aims to simultaneously realize standardization of a control valve accommodated in a mounting hole of a target device and cost reduction of a sealing structure of the mounting portion. To do.

  In order to solve the above problems, a control valve unit according to an aspect of the present invention is configured by assembling a valve main body and a solenoid, and controls the flow rate of the working fluid flowing through the internal passage of the target device. A control valve housed in the mounting hole formed from the valve body side, a connection terminal for power supply connectable to the conductive terminal of the solenoid, and the connection terminal are fixed and detachably connected to the control valve. A connector housing made of a corrosion-resistant member, and a connector arranged so that the connector housing seals the opening of the mounting hole when the control valve is received in the mounting hole, and the connection between the control valve and the connector. And a seal member that is fitted in the vicinity of the portion and restricts the intrusion of the external atmosphere into the mounting hole when the control valve is accommodated in the mounting hole.

  According to this aspect, since the control valve and the connector are configured to be detachable, there is a possibility that the control valve can be continuously used even if the specification of the connector is changed, and the control valve can be standardized. it can. In that case, since it is sufficient to change the design of only the connector, the manufacturing cost can be suppressed. On the other hand, a connector housing made of a corrosion-resistant member also serves as a sealing member for the mounting hole, and the sealing member provided in the vicinity of the connection portion between the control valve and the connector restricts the entry of the external atmosphere into the mounting hole. Therefore, the corrosion resistance can be maintained without using a material particularly excellent in rust prevention or the like for the control valve installed in the mounting hole. As a result, the manufacturing cost of the control valve can be suppressed.

  Another aspect of the present invention is a connector. This connector includes a valve body and a solenoid integrally, and is a control valve that is accommodated from the valve body side in a mounting hole formed in the housing of the target device in order to control the flow rate of the working fluid flowing through the internal passage of the target device. On the other hand, it is a connector connected to supply power to the solenoid, and the connection terminal for supplying power that can be connected to the conductive terminal of the solenoid and the connection terminal are fixed and detachably connected to the solenoid. A connector housing made of a corrosion-resistant member, and a seal member fitted to the connector housing in the vicinity of the connecting portion with the solenoid. When the control valve is accommodated in the mounting hole, the connector housing is arranged to seal the opening of the mounting hole.

  According to this aspect, since the connector housing itself has corrosion resistance, and the seal member is fitted in the vicinity of the connection portion with the solenoid, the connector is simply accommodated in the mounting hole while being connected to the control valve. The sealing performance inside the mounting hole can be maintained easily and at low cost.

  According to the present invention, it is possible to simultaneously realize standardization of the control valve accommodated in the mounting hole of the target device and cost reduction of the seal structure of the mounting portion.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, for the sake of convenience, the positional relationship between the structures may be expressed as upper and lower with reference to the illustrated state.

FIG. 1 is a cross-sectional view illustrating a configuration of a control valve unit according to an embodiment.
The control valve unit of the present embodiment is configured by detachably connecting the control valve 1 and the connector 101. The control valve 1 is configured as a control valve for a variable capacity compressor that controls a variable capacity compressor (not shown) (single “compressor”) installed in the refrigeration cycle of the automotive air conditioner. This compressor compresses a refrigerant as a working fluid flowing through the refrigeration cycle, and discharges it as a high-temperature and high-pressure gas refrigerant. The gas refrigerant is condensed by a condenser and further adiabatically expanded by an expansion device to become a low temperature / low pressure mist refrigerant. The low-temperature and low-pressure refrigerant evaporates in the evaporator, and the passenger compartment air is cooled by the latent heat of vaporization. The refrigerant evaporated in the evaporator is returned again to the compressor and circulates in the refrigeration cycle.

  The control valve 1 includes a valve body 2 including a valve portion that opens and closes a refrigerant passage for introducing a part of the discharged refrigerant into the crank chamber, and a refrigerant flow rate that is introduced into the crank chamber by adjusting the opening of the valve portion. The solenoid 3 to be controlled is integrally assembled.

  The valve body 2 includes a stepped cylindrical body 5, a valve portion provided inside the body 5, and a power element 6 (“sensation” provided at the upper end of the body 5 for generating a driving force for opening and closing the valve portion. Corresponding to “pressure part”).

  A port 11 (corresponding to a “discharge chamber communication port”) that receives the discharge pressure Pd in communication with the discharge chamber of the variable capacity compressor is provided on the side of the body 5. Around the port 11, a strainer 12 for suppressing entry of dust and the like into the body 5 is attached. The port 11 communicates internally with a port 13 (corresponding to a “crank chamber communication port”) provided in the upper portion of the body 5. The port 13 communicates with a crank chamber of the variable capacity compressor and derives a controlled crank pressure Pc in the crank chamber.

  A valve hole 15 is formed in the refrigerant passage communicating the port 11 and the port 13, and a valve seat 16 is formed by an opening edge of the valve hole 15 on the discharge chamber side. A long actuating rod 17 is inserted through the center of the body 5 in the axial direction. The operating rod 17 is formed into a bottomed cylindrical shape by processing, for example, a pipe material formed by extruding stainless steel, and is disposed with its bottom portion facing up. The upper end side of the operating rod 17 penetrates the valve hole 15 and is slidably supported by a sliding hole 14 provided in the body 5. A step portion 18 having a diameter reduced so as to be partially constricted is provided on a side portion near the upper end of the operating rod 17, and a base end portion of the step portion 18 constitutes a valve body 20. The gap between the stepped portion 18 of the operating rod 17 and the valve hole 15 forms a refrigerant passage that connects the port 11 and the port 13. The upper bottom portion of the operating rod 17 can come into contact with a diaphragm 19 constituting the power element 6. The valve body 20 faces the valve seat 16 from the discharge chamber side, and opens and closes the valve hole 15 by attaching and detaching the outer peripheral edge of the distal end surface to the valve seat 16.

  The inner diameter of the lower end opening of the body 5 is expanded downward, and a disc-shaped spring receiving member 21 is press-fitted. An insertion hole 23 is provided in the center of the bottom portion of the spring receiving member 21, and the lower end portion of the operating rod 17 is inserted therethrough. Further, a lip packing 25 as a seal member is disposed so as to seal the upper end opening (corresponding to the “high-pressure side opening”) of the spring receiving member 21. When the differential pressure acts on the lip packing 25, the lip portion 27 is pressed against the sliding surface of the operating rod 17, and the leakage of the discharged refrigerant is suppressed by the self-sealing action. In the modification, squeeze packing such as O-ring and V-ring may be used instead of the lip packing 25.

  The lower portion of the body 5 is press-fitted into the upper end portion of the solenoid 3. A port 26 (corresponding to a “suction chamber communication port”) is formed between the lower end of the body 5 and the solenoid 3 to receive the suction pressure Ps in communication with the suction chamber of the variable capacity compressor. The port 26 communicates with the lower end opening of the operating rod 17. An internal space surrounded by the body 5 and the solenoid 3 forms a pressure chamber 28 into which the suction pressure Ps is introduced. The pressure chamber 28 communicates with the pressure chamber 29 of the power element 6 through an internal passage provided in the operating rod 17, and the suction pressure Ps is introduced into the pressure chamber 29. The suction pressure Ps can also be introduced into the solenoid 3. Furthermore, a spring 30 that biases the operating rod 17 in the valve opening direction is interposed between the lower end of the operating rod 17 and the bottom of the spring receiving member 21.

  On the other hand, the solenoid 3 is magnetically generated by a case 31 that also functions as a yoke, a core 32 that is fixed to the case 31, a plunger 33 that is disposed in the case 31 so as to face the core 32 in the axial direction, and a supply current from the outside. And an electromagnetic coil 34 for generating a circuit. The core 32 extends above the case 31 while the upper portion of the core 32 is expanded in diameter, and the lower end portion of the body 5 is press-fitted into the upper end opening thereof. As a result, the valve body 2 and the solenoid 3 are assembled together. A communication hole that forms a port 26 is provided in the upper end side portion of the core 32. The case 31 has a bottomed cylindrical shape and is fixed to the core 32 by crimping the upper end opening inward.

  The core 32 is provided with an insertion hole 35 penetrating the center in the axial direction, and a shaft 36 for transmitting a solenoid force to the valve body 20 is inserted therethrough. A ring-shaped bearing member 38 is press-fitted into the upper end opening of the core 32, and the shaft 36 is slidably supported by the bearing member 38. The shaft 36 extends through the bearing member 38 to the inside of the operating rod 17, and its tip supports the upper bottom portion of the operating rod 17 from below. The suction pressure Ps in the pressure chamber 28 is introduced into an internal passage formed by a gap between the shaft 36 and the actuating rod 17, while entering the solenoid 3 through a minute gap between the shaft 36 and the bearing member 38. Can also be introduced.

  Further, a bottomed sleeve 39 having a closed lower end is externally inserted into the core 32. In the bottomed sleeve 39, the plunger 33 is disposed below the core 32 so as to be able to advance and retract in the axial direction. The bottomed sleeve 39 is provided with a cylindrical bearing member 40 at the lower end thereof, and the lower end of the shaft 36 is slidably supported by the bearing member 40. The plunger 33 has a cylindrical shape and is press-fitted into the lower portion of the shaft 36. A spring 71 is interposed between the core 32 and the plunger 33 to bias the plunger 33 away from the core 32 (that is, the valve opening direction of the valve body 20). On the other hand, between the plunger 33 and the bearing member 40, a spring 72 that biases the plunger 33 in the direction in which the plunger 33 approaches the core 32 (that is, the valve closing direction of the valve body 20) is interposed. A bobbin 37 is extrapolated to the bottomed sleeve 39, and an electromagnetic coil 34 is wound around the bobbin 37.

  An insertion hole 41 is provided at the center of the bottom of the case 31, and the lower end of the bottomed sleeve 39 is exposed through the insertion hole 41. A pair of terminal lead-out portions 42 and a pair of fitted portions 43 extend downward from the bottom of the bobbin 37 and penetrate the bottom of the case 31, respectively. In the figure, for convenience of explanation, only one of the pair is displayed. A conductive terminal 45 is embedded in the terminal lead-out portion 42. One end of the conductive terminal 45 is connected to the end of the electromagnetic coil 34, and the other end is exposed downward from the terminal lead-out part 42. The fitted portion 43 is provided with a locking hole 46 for fixing the connector 101. A collar 47 is disposed at the bottom of the case 31 so as to be interposed between the bobbin 37 and the case 31. The collar 47 is made of a magnetic member and constitutes a magnetic circuit together with the case 31.

FIG. 2 is a partially enlarged cross-sectional view corresponding to the upper half of FIG.
The power element 6 includes a hollow housing 50 that is crimped and joined to seal the upper end opening of the body 5, and a metal thin film that is disposed so as to partition the inside of the housing 50 into a sealed space S 1 and an open space S 2. The diaphragm 19 which consists of, and the disk spring 51 which consists of a metal thin plate arrange | positioned in sealed space S1 are comprised. The diaphragm 19 may be made of a thin metal plate such as beryllium copper or stainless steel. The disc spring 51 may be made of, for example, stainless steel. Further, a thin film wear-resistant sheet 52 (corresponding to a “thin film member”) is interposed between the diaphragm 19 and the disc spring 51 to suppress wear between them. The wear resistant sheet 52 extends the life of the diaphragm 19. As the wear-resistant sheet 52, for example, a thin film sheet or a polyimide film made of a fluororesin such as Teflon (registered trademark) can be used. The open space S2 constitutes the pressure chamber 29 described above. In the present embodiment, a member formed by overlapping the diaphragm 19 and the disc spring 51 functions as a “pressure-sensitive member”.

  The housing 50 is composed of a dish-shaped first housing 53 and second housing 54 both obtained by press-molding stainless steel or the like. These openings are abutted against each other and the diaphragm 19 and the wear-resistant sheet 52 are formed on the outer edge thereof. It is assembled so as to sandwich the outer edge. That is, in the housing 50, the disc spring 51 is disposed on the first housing 53 side, and the diaphragm 19 and the wear-resistant sheet 52 are sandwiched between the first housing 53 and the second housing 54 along the joint portion. The outer periphery welding (TIG welding) is performed to form a container shape. The two housings are welded in a vacuum atmosphere, and after the welding, the ball member 55 is welded so as to seal the evacuation hole formed in the center of the bottom of the first housing 53. For this reason, the sealed space S1 is in a vacuum state, but the sealed space S1 may be filled with air or the like. The disc spring 51 arranged in the sealed space S <b> 1 has a convex shape in which the center part slightly bulges downward along the diaphragm 19. For this reason, when the power element 6 is left in the atmosphere, the diaphragm 19 also has a convex shape along the disc spring 51. An opening is provided at the center of the second housing 54, and the upper end of the actuating rod 17 can be brought into contact with the diaphragm 19 through the opening. A space surrounded by the upper end opening of the body 5, the second housing 54, the diaphragm 19, and the operating rod 17 forms a pressure chamber 29.

  The actuating rod 17 has a bottomed cylindrical shape that opens downward, and the center of the curved upper end surface is in contact with the center of the lower surface of the diaphragm 19. Since the upper end portion of the shaft 36 reaches the bottom portion of the operating rod 17, the operating rod 17 is supported in a so-called “quick and smooth” manner with the bottom portion as a fulcrum. Therefore, the distance between the fulcrum points of the pressure sensitive member (diaphragm 19 and disc spring 51) that sandwich the operating rod 17 and the shaft 36 is short, and the operating rod 17 is less likely to receive a moment due to the support force. Thereby, it is suppressed that the operating rod 17 inclines with respect to the axis line of the body 5.

  An internal passage 61 is formed by a gap between the inner peripheral surface of the operating rod 17 and the outer peripheral surface of the shaft 36, and the side portion near the upper end of the operating rod 17 communicates with the internal passage 61 and the pressure chamber 29. A hole 62 is formed. With such a configuration, the suction pressure Ps introduced through the port 26 is introduced into the internal passage 61 from the lower end opening 63 of the operating rod 17 and guided to the pressure chamber 29 through the communication hole 62. The diaphragm 19 senses this suction pressure Ps and expands and contracts in the valve opening / closing direction.

  In the present embodiment, the cross-sectional area A of the sliding hole 14 and the cross-sectional area B of the valve hole 15 are formed to be equal, and the cross-sectional area C of the insertion hole 23 is slightly larger than these, but substantially equal to each other. Yes. Accordingly, the force due to the crank pressure Pc and the like acting on the operating rod 17 is canceled. The valve body 20 opens and closes based on the suction pressure Ps sensed by the pressure-sensitive member of the power element 6 in the control state.

  The pressure-sensitive member of the present embodiment has a rigidity obtained by combining the individual rigidity of the diaphragm 19 and the disc spring 51, and maintains the flexibility of the diaphragm 19, while the pressure resistance is increased by the disc spring 51. Since the disc spring 51 has a shape bulging convexly on one side, when a load is applied from the convex side, the amount of deformation is small while the load is small, but the side becomes flat as the load increases. When the load is further increased, the center portion is reversed and the center portion is greatly displaced. For this reason, the deformation characteristics with respect to the load of the disc spring 51 are nonlinear as a whole, but have a linearity in a predetermined displacement width before and after the shape becomes flat. Here, accurate valve opening degree control is performed by using this linear region as a control region. By adjusting the load of the disc spring 51, the suction pressure Ps required for displacing the pressure-sensitive member including the diaphragm 19 and the disc spring 51 also changes. The set load of the disc spring 51 can be changed by changing the amount of current supplied to the solenoid 3. As a result, the valve body 20 operates so that the suction pressure Ps becomes a set pressure set by the amount of current supplied to the solenoid 3.

FIG. 3 is a cross-sectional view of the control valve unit of FIG. (A) represents an AA arrow section, (B) represents a BB arrow section, (C) represents a CC arrow section, (D) represents a DD arrow section. Represents.
As shown in FIG. 1, the connector 101 is configured by disposing connection terminals 104 inside a connector housing 102. The connector housing 102 is made of a bottomed stepped cylindrical resin material having corrosion resistance, and a claw portion 106 (corresponding to a “fitting portion”) projecting inward in the vicinity of the upper end opening is integrally formed. . The connector housing 102 is fixed to the solenoid 3 by fitting the claw portion 106 into the locking hole 46 of the fitting portion 43 described above. A through hole 108 is provided at the bottom of the connector housing 102, and a rubber bush 110 is press-fitted in an airtight manner. A harness 112 connected to an external power source is inserted in the rubber bush 110 in an airtight manner, and a tip end portion of the harness 112 is exposed in the internal space of the connector housing 102. As shown in FIG. 3 (A), a pair of conductive terminals 45 extend at positions symmetrical with respect to the axis along the shaft 36, and a pair of covered terminals are located at positions shifted by 90 degrees about the axis. The fitting part 43 extends. For the sake of convenience, FIG. 1 shows a cross section shifted by 90 degrees as shown in FIG.

  A pair of connection terminals 104 are provided in the connector housing 102 so as to face the pair of conductive terminals 45, one of which is a positive electrode and the other is a negative electrode. Each connection terminal 104 is fixed in the connector housing 102 and arranged to extend vertically. As shown in FIG. 3 (B), an upper end portion of the connection terminal 104 is formed in a circularly crimped connection portion, and the conductive terminal 45 is detachably connected to the connection portion. As shown in FIG. 3C, the lower end of the connection terminal 104 is crimped in a U shape, and the upper end of the harness 112 is fixed. As shown in FIG. 3 (D), a pair of rubber bushings 110 are arranged to pass through symmetrical positions on the bottom surface of the connector housing 102, and each of them passes through the harness 112 in an airtight manner. An O-ring 115 (corresponding to a “seal member”) is fitted on the outer peripheral surface of the open end of the connector housing 102.

FIG. 4 is a diagram illustrating a method of assembling the control valve unit. FIG. 5 is a diagram illustrating a state in which the control valve unit is accommodated in the compressor.
As shown in FIG. 4, when assembling the control valve 1 in the mounting hole 152 formed in the compressor housing 150, first, after the O-ring 115 is fitted to the connector housing 102 to form the connector 101, The connector 101 is attached to the solenoid 3. The control valve unit assembled in this way is inserted into the mounting hole 152 from the valve body 2 side, and fixed by attaching the C ring 154 to the opening end of the mounting hole 152. In the modification, the control valve unit may be fixed by a fixing means other than a washer or other C ring.

  As a result, as shown in FIG. 5, the control valve 1 is completely accommodated in the mounting hole 152 of the compressor, and its ports 11, 13, and 26 are communicated with the refrigerant passage in the housing 150. As described above, the ports 11, 13, and 26 are communicated with a discharge chamber, a crank chamber, and a suction chamber (not shown) of the compressor, respectively. On the other hand, the connector housing 102 of the connector 101 seals the opening of the mounting hole 152. In addition, since the O-ring 115 is interposed so as to seal the gap between the connector housing 102 and the mounting hole 152, the outside atmosphere can surely enter the mounting hole 152 inward of the sealing position. Has been prevented. In the present embodiment, as shown in the figure, the O-ring 115 is disposed on the opening side of the connection portion between the case 31 and the connector housing 102 in the mounting hole 152, that is, the connection portion between the control valve 1 and the connector 101. ing. Therefore, the external atmosphere is prevented from entering the inside of the mounting hole 152 through the gap between the case 31 and the mounting hole 152, and the connector 101 and the control are controlled through the gap between the case 31 and the connector housing 102. Intrusion into the valve 1 is also prevented. Two intrusion paths can be sealed simultaneously by one O-ring 115, and the simplification and cost reduction of the sealing structure are realized.

  As described above, since the control valve unit of the present embodiment is configured so that the control valve 1 and the connector 101 can be attached and detached, the control valve 1 continues even if the specifications of the connector 101 are changed. And standardization of the apparatus can be promoted. On the other hand, when the control valve 1 is assembled into the mounting hole 152 of the housing 150, the connector 101 itself functions as a seal member. That is, the connector housing 102 also serves as a sealing member for the mounting hole 152, and a reliable seal is provided by an O-ring 115 fitted to the outer peripheral surface thereof. For this reason, the intrusion of the external atmosphere into the inside of the mounting hole 152 is surely prevented, and even if the control valve 1 installed therein is not subjected to a particularly expensive antirust treatment or using a material with excellent corrosion resistance, Its corrosion resistance can be maintained. The connector housing 102 itself is exposed to the external atmosphere, but is not rusted or corroded because it is made of a corrosion-resistant member.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the specific embodiments, and various modifications can be made within the scope of the technical idea of the present invention. Needless to say.

FIG. 6 is a cross-sectional view of a control valve unit according to a first modification. In the figure, components that are substantially the same as those of the embodiment shown in FIG.
This control valve unit is configured by assembling a control valve 201 and a connector 121. The solenoid 203 of the control valve 201 is not provided with a spring as in the above embodiment between the core 32 and the plunger 33 and between the plunger 33 and the bearing member 40. For this reason, when the solenoid 203 is not energized, the plunger 33 is locked to the upper surface of the bearing member 40.

  The connector 121 is not the type that pulls out the harness as in the above embodiment, and only the connection terminal 124 is exposed. An intermediate portion of the connection terminal 124 is molded in the connector housing 122. A connector (not shown) connected to an external power source is connected to the connection terminal 124. The connector housing 122 is detachably attached to the solenoid 203 via the claw portion 106, but the O-ring 115 as in the above embodiment is not provided on the outer peripheral surface of the connector housing 122.

  That is, in this modification, as shown in the drawing, the lower end portion of the case 210 of the solenoid 203 is reduced in diameter, and the O-ring 115 is fitted on the outer peripheral surface of the reduced diameter portion. A slightly small O-ring 125 (corresponding to a “second seal member”) is interposed at a connection portion with the case 210 at the opening end of the connector housing 122. When the control valve unit of this modification is assembled in the mounting hole 152 of the housing 150, the O-ring 115 and the O-ring 125 provide a reliable seal. That is, the O-ring 115 seals the case 210 and the mounting hole 152, and the O-ring 125 seals the connector 121 and the control valve 201. Note that the O-ring 115 can also serve as a seal between the connector 121 and the control valve 201 depending on the fitting position, such as when the O-ring 115 is disposed at a position where the O-ring 115 can be brought into close contact with the connector housing 122. The ring 125 can be omitted.

FIG. 7 is a cross-sectional view of a control valve unit according to a second modification. In the figure, components that are substantially the same as those of the first modification shown in FIG.
This control valve unit is configured by assembling a control valve 301 and a connector 121. In the solenoid 303 of the control valve 301, the case 310 is formed in a cylindrical shape, and a collar 347 fixed to the lower end of the case 310 constitutes the bottom of the case 310. A concave groove 312 is provided around the lower end of the case 310 by caulking, and an O-ring 115 is fitted in the groove 312. An O-ring 125 is interposed between the lower end opening of the case 310 and the connector housing 122.

  That is, also in this modification, when the control valve unit is assembled in the mounting hole 152 of the housing 150, the case 310 and the mounting hole 152 are sealed by the O-ring 115, and the connector 121 and the control valve are sealed by the O-ring 125. 301 is sealed.

  In the above embodiment and modification, an O-ring is used as a seal member fitted to a connector housing or case. However, a squeeze packing other than an O-ring such as a V-ring may be used, or a lip packing is used. May be. Each packing may be ring-shaped or cylindrical.

  In the above embodiment, the control valve 1 is configured as a so-called Ps sensing valve that performs capacity control so that the suction pressure Ps of the variable capacity compressor is maintained at a set pressure. The control method and control target of the control valve are not limited to these. For example, in the configuration shown in FIG. 2, the cross-sectional area of the insertion hole 23 is made larger than the cross-sectional area of the valve hole 15 while keeping the cross-sectional area of the sliding hole 14 and the cross-sectional area of the valve hole 15 equal. 20 may be configured such that a differential pressure (Pd−Ps) between the discharge pressure Pd and the suction pressure Ps acts. If comprised in this way, what is called Pd- which controls the flow volume of the refrigerant | coolant introduce | transduced from a discharge chamber to a crank chamber so that a control valve may maintain a differential pressure (Pd-Ps) at the setting differential pressure set with the supply current value. It can also function as a Ps valve. In the above embodiment, the control valve 1 is configured as a control valve for controlling the flow rate of the refrigerant introduced from the discharge chamber of the variable capacity compressor into the crank chamber. However, the refrigerant led out from the crank chamber to the suction chamber is shown. You may comprise as a control valve which controls flow volume. Further, for example, in the configuration shown in FIG. 2, a refrigerant passage that communicates the port 13 and the port 26 and another valve portion that opens and closes the refrigerant passage may be provided to constitute a so-called three-way valve. Furthermore, you may comprise as an electromagnetic valve which controls a working fluid not in a vehicle air conditioner but in other apparatuses mounted in vehicles, such as a fuel injection valve. Or you may comprise as an electromagnetic valve which controls a working fluid in apparatuses other than a vehicle like a control valve which controls the pouring of a hot water supply apparatus, for example.

FIG. 8 is a cross-sectional view of a control valve unit according to the second embodiment. In the figure, components that are substantially the same as those of the embodiment shown in FIG.
This control valve unit is configured by assembling a control valve 401 and a connector 481. The control valve 401 is configured by assembling a valve body 402 and a solenoid 403 integrally. A power element 406 is provided at the upper end of the body 405 of the valve body 402.

  The body 405 has a double structure and is configured by inserting a stepped cylindrical second body 408 through a stepped cylindrical first body 407. Each structure of the first body 407 and the second body 408 will be described in detail later. A valve hole 15 is formed in a refrigerant passage communicating the port 11 and the port 13 in the body 405, and a valve seat 16 is formed by an opening edge of the valve hole 15 on the discharge chamber side. A long operating rod 417 and a transmission rod 418 are coaxially inserted so as to extend in the axial direction in the center of the body 405.

  The lower portion of the body 405 is press-fitted into the upper end portion of the solenoid 403. A port 26 that receives the suction pressure Ps is formed at the lower end of the body 405. A spring 430 that biases the operating rod 417 in the valve closing direction is interposed between the lower end of the operating rod 417 and the solenoid 403.

  On the other hand, the upper portion of the core 432 of the solenoid 403 extends above the case 431, and the upper end opening is inserted into the lower half of the second body 408, while the lower end of the first body 407 is inserted by press fitting. It is inserted. A ring-shaped connecting member 425 made of a magnetic material is interposed between the upper end portion of the case 431 and the side portion of the core 432.

  The core 432 is provided with an insertion hole 435 passing through the center in the axial direction, and a shaft 436 for transmitting a solenoid force is inserted therethrough. The shaft 436 extends through the core 432 and the operating rod 417 to the inside of the transmission rod 418. The tip of the shaft 436 is locked at the intermediate portion of the transmission rod 418, and supports the transmission rod 418 from below. A communication groove 437 extending parallel to the axis is provided on the outer peripheral surface of the shaft 436, and the suction pressure Ps in the pressure chamber 28 can be introduced into the solenoid 403 through the communication groove 437.

  The core 432 is also provided with a bottomed stepped cylindrical sleeve 438 whose bottom end is closed. In the sleeve 438, the plunger 433 is disposed below the core 432 so as to be able to advance and retract in the axial direction. A reduced diameter portion 439 having a slightly smaller inner diameter is provided at the bottom of the sleeve 438, and the plunger 433 can be locked on the side opposite to the core 432 by the stepped portion. The plunger 433 has a stepped cylindrical shape, and its lower half is press-fitted into the lower portion of the shaft 436. A communication hole 448 that communicates the inside and the outside is provided at the center of the bottom of the plunger 433 so that the suction pressure Ps introduced into the solenoid 403 can be guided to the back pressure chamber 440 on the reduced diameter portion 439 side. That is, in this embodiment, the suction pressure Ps can be introduced into the back pressure chamber 440 through the central portion of the plunger 433. A non-magnetic bobbin 441 is extrapolated to the sleeve 438, and the electromagnetic coil 34 is wound around the bobbin 441.

  A collar 442 made of a magnetic member that forms a magnetic circuit together with the case 431 is disposed at the lower end opening of the case 431. The collar 442 is fixed so as to be sandwiched between the case 431 and the bobbin 441 by crimping the lower end of the case 431 inward.

  The connector 481 is configured by molding a connection terminal 483 in a bottomed cylindrical connector housing 482 made of a corrosion-resistant member (resin). The connection terminal 483 has an intermediate portion molded in the connector housing 482, one end connected to the electromagnetic coil 34, and the other end connected to an external power source via a connector (not shown). A claw portion 484 (corresponding to a “fitting portion”) projects from the opening end of the connector housing 482, while the collar 442 has a fitting hole 485 (“ Corresponding to “fit part”) is provided. The connector housing 482 is attached to the solenoid 403 by the claw portion 484 being inserted into the fitting hole 485 and being locked inside the solenoid 403.

  An O-ring 115 is fitted on the outer peripheral surface of the opening end of the connector housing 482. When the control valve 401 is assembled to the mounting hole 152 (see FIG. 4) of the housing 150, the O-ring 115 is interposed so as to seal the gap between the connector housing 482 and the mounting hole 152. Intrusion of the external atmosphere to the inside of the mounting hole 152 from the sealing position is prevented.

FIG. 9 is a partially enlarged cross-sectional view corresponding to the upper half of FIG.
The first body 407 has a cylindrical main body made of a metal having excellent corrosion resistance such as brass. On the side of the first body 407, communication holes 81 and 82 are provided in order from the power element 406 side to communicate inside and outside. The valve hole 15 is disposed between the communication hole 81 and the communication hole 82 in the first body 407, and a guide hole 423 is formed by an inner peripheral surface on the lower end side of the communication hole 82. That is, the communication hole 82 constitutes a “discharge chamber communication hole” communicating with the port 11 and introduces the discharge pressure Pd therein. The valve seat 16 is formed on a tapered surface provided inside the communication hole 82 in the first body 407. The communication hole 81 constitutes a “crank chamber communication hole” communicating with the port 13, and guides the crank pressure Pc generated through the valve portion to the outside. The sliding hole 14 is disposed on the side of the communication hole 81 opposite to the valve hole 15. The first body 407 is inserted so that the longitudinal center portion that defines the communication hole 81 and the communication hole 82 is press-fitted into the second body 408, and the lower end is inserted into the upper end opening of the core 432. Yes.

  On the other hand, the second body 408 has a stepped cylindrical main body made of a resin material such as 66 nylon, and is press-fitted so that the lower half of the second body 408 is externally inserted into the upper end of the core 432. A port 13 is formed between the upper end opening of the second body 408 and the power element 406. Further, the port 11 is formed in the center of the side portion of the second body 408, and the port 26 is formed in the lower part. A communication hole 83 that communicates the inside and the outside is provided at a position corresponding to the port 26 on the side of the core 432. The communication hole 83 constitutes a “suction chamber communication hole” communicating with the port 26 and introduces the suction pressure Ps into the internal pressure chamber 28. The second body 408 is formed by cutting a rough shape formed by forging using this resin material. As the resin material, polyamide (PA) or polyacetal (POM) having moderate flexibility is employed. When polyamide (PA) is employed, one containing glass may be used. The press-fitting allowance can be increased by providing the second body 408 with flexibility, and the press-fitting allowance into the first body 407 while extending and deforming the press-fitting allowance allows the adhesion when pressed into the first body 407. Is increasing.

  An O-ring 427 for sealing is disposed in a space surrounded by the first body 407, the core 432, and the operating rod 417. While the O-ring 427 is pressed against the upper end surface of the core 432 by the differential pressure between the pressure of the refrigerant leaked into the space through the guide hole 423 from the port 11 side and the pressure of the pressure chamber 28 (suction pressure Ps), The inner peripheral surface is in close contact with the outer peripheral surface of the operating rod 417. As a result, the high-pressure refrigerant in the space is restricted from leaking into the low-pressure side pressure chamber 28 through the gap between the opening end inner peripheral portion 85 of the core 432 and the operating rod 417.

  The operating rod 417 is formed in a stepped cylindrical shape by processing a pipe material obtained by extruding stainless steel, for example, and has a guide hole 423 provided in the lower portion of the first body 407 and an opening of the core 432 positioned below the guide hole 423. A shaft is slidably supported by the end inner peripheral portion 85. The outer peripheral edge of the upper end of the operating rod 417 constitutes a valve body 420 that is attached to and detached from the valve seat 16 to open and close the first valve. That is, the valve body portion 420 faces the valve seat 16 from the discharge chamber side, and opens and closes the valve hole 15 by attaching and detaching the outer peripheral edge of the distal end surface to the valve seat 16.

  On the other hand, the transmission rod 418 is formed into a bottomed cylindrical shape by processing a pipe material obtained by extruding stainless steel, for example, and is disposed with the bottom portion facing up. The upper bottom portion of the transmission rod 418 is in contact with a diaphragm 419 constituting the power element 406. The transmission rod 418 is slidably supported by the sliding hole 14 provided in the body 405.

  The operating rod 417 and the transmission rod 418 are connected in a detachable manner in the axial direction thereof, and in normal control state, they are in contact with each other and operate integrally, but when moving to the maximum capacity operation, the solenoid The transmission rod 418 is pushed up by the force, and both are temporarily separated. That is, at this time, the operating rod 417 is located at the top dead center by the biasing force of the spring 430, and the valve body 420 is seated on the valve seat 16 to close the first valve portion. On the other hand, since the transmission rod 418 is further pushed up by the solenoid force, the second valve portion formed between the operating rod 417 and the transmission rod 418 is opened. As a result, the port 13 and the port 26 communicate with each other, and the refrigerant in the crank chamber is led to the suction chamber and the decrease in the crank pressure Pc is promoted. Therefore, the maximum capacity operation can be promptly shifted. That is, the outer peripheral portion of the lower end of the transmission rod 418 constitutes the valve body portion 421, and the distal end surface (taper surface) of the operating rod 417 to which the valve body portion 421 is attached and detached constitutes the valve seat portion 422.

  The power element 406 is disposed so as to partition a hollow housing 450 crimped so as to seal the upper end opening of the first body 407, and a sealed space S1 and an open space S2 inside the housing 450. And a metal diaphragm 419. Diaphragm 419 is formed such that a thin stainless steel plate is formed and its central portion is slightly expanded toward the transmission rod 418 side.

  The housing 450 includes a first housing 453 and a second housing 454 both obtained by press-forming a stainless steel plate, and is assembled so that these openings are abutted. At that time, the diaphragm 419 and the wear-resistant sheet 452 are interposed between the two housings and fixed. A circular hole is provided in the center of the wear-resistant sheet 452, and the tip of the spring receiving member 455 is penetrated. Outer periphery welding (TIG welding) is performed along the joint portion with the diaphragm 419 and the wear resistant sheet 52 sandwiched between the first housing 453 and the second housing 454.

  In the sealed space S1, a spring receiving member 455 that contacts the diaphragm 419 and a spring receiving member 456 that contacts the first housing 453 are disposed, and a coil spring 451 is interposed between the spring receiving members. The spring receiving member 455 is provided with a stepped protrusion 457 projecting toward the diaphragm 419 at the center of the lower surface of the disk-shaped main body, and abuts the diaphragm 419 at the stepped protrusion 457. A concave portion complementary to the stepped convex portion 457 is formed at the center portion of the diaphragm 419 and is fitted to the stepped convex portion 457. The pressure receiving portion 470 of the diaphragm 419 has a shape that swells in the valve opening direction as a whole. The outer diameter of the spring receiving member 455 is slightly smaller than the inner diameter of the facing portion of the first housing 453, but the first housing 453 is reduced in diameter upward and is formed by the proximal end portion of the reduced diameter portion. The upward movement of the first housing 453 is restricted by the stopper portion 458. On the other hand, the spring receiving member 456 has a dish-shaped main body having a recess 459 on the upper surface. A convex portion 460 that protrudes downward is provided at the center of the bottom of the first housing 453, and a spring receiving member 456 is supported from above.

  The first housing 453 is expanded in diameter below the side facing portion of the spring receiving member 455. On the other hand, the second housing 454 is press-fitted into the enlarged diameter portion of the first housing 453 so that the wear-resistant sheet 452 and the diaphragm 419 are sandwiched between the second housing 454 and the first housing 453. Diaphragm 419 is sandwiched between first sandwiching portion 464 located on the side surface near the opening of second housing 454 and second sandwiching portion 466 located on the upper surface of the peripheral edge of second housing 454. TIG welding is performed along a joint portion facing downward between the first housing 453 and the second housing 454. As shown in the drawing, since a gap 468 is formed between the first clamping portion 464 and the second clamping portion 466, the peripheral edge portion of the diaphragm 419 expands inward when outer periphery welding is performed. Even if displaced, the air gap 468 absorbs the deformation of the peripheral edge. For this reason, the deformation of the pressure receiving portion 470 of the diaphragm 419 located inward of the second clamping portion 466 is prevented. The second housing 454 has a thin opening at the lower end, and is fixed to the upper opening of the first body 407 by caulking the thin portion inward.

  Since the opening part is provided in the center part of the 2nd housing 454, the upper end part of the transmission rod 418 contact | abuts to the diaphragm 419 via the opening part from the downward direction. A space surrounded by the upper end opening of the body 405, the second housing 454, the diaphragm 419, and the transmission rod 418 forms a pressure chamber 29. The diaphragm 419 of the present embodiment is formed with high rigidity so that the pressure receiving portion 470 has a reversal characteristic like a disc spring.

  The transmission rod 418 has a bottomed stepped cylindrical shape that opens downward, and the center of the upper end surface is in contact with the center of the lower surface of the diaphragm 419. An upper end portion of the shaft 436 is press-fitted into the lower half portion of the transmission rod 418 and supports the transmission rod 418 from below. A communication hole 74 that connects the internal passage 471 and the pressure chamber 29 is formed in a side portion near the upper end of the transmission rod 418. With such a configuration, the suction pressure Ps introduced through the port 26 is introduced from the lower end opening of the operating rod 417 and guided to the pressure chamber 29 through the internal passage 471 and the communication hole 74. The diaphragm 419 detects the suction pressure Ps and expands and contracts in the valve opening / closing direction.

  Also in the present embodiment, the cross-sectional area A of the sliding hole 14 and the cross-sectional area B of the valve hole 15 are formed to be equal, and the cross-sectional area C of the open end inner peripheral portion 85 of the core 432 is slightly larger than these, Are equally formed. Therefore, the force due to the crank pressure Pc and the like acting on the combined body when the operating rod 417 and the transmission rod 418 are operating integrally is canceled. For this reason, the valve body 420 opens and closes based on the suction pressure Ps sensed by the diaphragm 419 in a normal control state.

  The diaphragm 419 retains flexibility as a metal thin film material, and is hardened in the above-described processing process to increase pressure resistance. Since the pressure receiving portion 470 of the diaphragm 419 has a shape bulging convexly on one side like a disc spring, when a load is applied from the convex portion side, the pressure receiving portion 470 gradually increases toward the flat side as the load increases. Deform. The diaphragm 419 has linearity between its displacement and pressure within the range of this deformation. Thus, by making the pressure receiving part 470 swell to one side, the stroke amount of the diaphragm 419 can be greatly increased as compared with the effective pressure receiving area.

  The load of the coil spring 451 that urges the pressure receiving portion 470 in the valve opening direction can be adjusted by changing the height of the convex portion 460 by pressing the center of the upper surface of the first housing 453 from the outside. . By adjusting the load of the coil spring 451, the suction pressure Ps (set value) required to displace the diaphragm 419 also changes. The set value can be changed by changing the amount of current supplied to the solenoid 403. As a result, the valve body 420 is operated so that the suction pressure Ps becomes a set pressure set by the amount of current supplied to the solenoid 403.

  Next, the connector connection structure of the present embodiment will be described in detail. FIG. 10 is an explanatory diagram showing the structure of the connector. (A) is the sectional view, (B) is the top view, (C) is the elements on larger scale showing the shape of the front-end | tip part of a connection terminal. FIG. 11 is a diagram illustrating a structure of a bobbin constituting the solenoid. (A) is a partially cutaway sectional view thereof, (B) is a bottom view thereof, and (C) is a partial arrow view as viewed from the E direction of (A).

  As shown in FIG. 10, a pair of connection terminals 483 are molded in the vicinity of the periphery of the connector housing 482 in the connector 481 so as to be arranged in parallel. A slit 486 having a predetermined depth is formed at the tip of the connection terminal 483. On the other hand, a claw portion 484 is provided at a position substantially symmetric with respect to the connection terminal 483 in the connector housing 482 so as to extend to substantially the same height as the tip of the connection terminal 483.

  On the other hand, as shown in FIG. 11, a terminal forming portion 491 is provided at a position facing each connection terminal 483 on the shaft end portion 490 on the side facing the connector 481 in the bobbin 37. The terminal forming portion 491 has a prismatic shape formed integrally with the bobbin 37, and a slit 492 is formed at the tip thereof. The slit 492 can be fitted into the slit 486 of the connection terminal 483. In two places of the shaft end portion 490, there are formed lead-out passages 493 for pulling out both end portions of the electromagnetic coil 34 (not shown) wound around the shaft of the bobbin 37 to the terminal forming portion 491 side. One tip of the electromagnetic coil 34 is wound around one of the pair of terminal forming portions 491, and the other tip is wound around the other terminal forming portion 491. That is, as indicated by a one-dot chain line in FIG. 3A, the tip end portion of the electromagnetic coil 34 is drawn out through the lead-out passage 493 and wound around the outer peripheral surface of the terminal forming portion 491. The terminal forming portion 491 is provided with locking holes 497 and 498 (corresponding to “locking portion”) for hooking the hook-shaped tip of the connection terminal 483. As shown in the drawing, each of the locking holes is formed of a symmetric stepped hole, and is configured so that the tip of the connection terminal 483 can be locked to the stepped portion.

  When the connector 481 is assembled to the control valve 401, the connection terminal 483 is connected to the terminal forming portion 491 so as to be fitted from below. At this time, the connection terminal 483 is connected so that the slit 486 is fitted into the slit 492 of the terminal forming portion 491. Since the slit 486 is deeper than the slit 492, the connection terminal 483 is deformed so as to expand in the width direction of the slit 486 as the fitting of the distal end proceeds. As a result, the tip end portion of the locking holes 497 and 498 gets over the stepped portions while elastically deforming, and is locked by being hooked to each stepped portion. At this time, the connection terminal 483 comes into contact with the tip of the electromagnetic coil 34 from the outside, and the energization circuit of the solenoid 403 can be conducted.

  As described above, the connector 481 can be easily attached to the control valve 401 with one touch by having a configuration in which the pair of connection terminals 483 and the claw portions 484 are fixed to the solenoid 403 so as to be hooked. Further, since the conductive terminal of the solenoid 403 is configured with a simple structure in which the electromagnetic coil 34 is wound around the terminal forming portion 491, it is not necessary to provide a separate terminal member, and the number of parts can be reduced.

  FIG. 12 is a cross-sectional view of a control valve unit according to the third embodiment. The control valve unit of the present embodiment has substantially the same configuration as that of the second embodiment except for a part. For this reason, in the figure, the same code | symbol is attached | subjected about the component similar to 2nd Embodiment shown in FIG. 8, and the description is abbreviate | omitted. FIG. 13 is a partially enlarged view showing the structure and arrangement of the seal member arranged inside the control valve. (A) is a partial expanded sectional view showing the structure of a seal member and its vicinity, (B) is a top view showing the structure of a seal member.

  As shown in FIG. 12, the control valve unit of the present embodiment is configured by assembling a control valve 501 and a connector 581. The first body 507 of the valve main body 502 has a bottomed cylindrical shape, and the transmission rod 418 and the power element 406 are connected to each other through an insertion hole provided at the center of the upper bottom portion. In the vicinity of the bottom of the first body 507, a communication hole that communicates the inside and the outside is formed, and the refrigerant that has passed through the inside of the transmission rod 418 can be introduced into the lower surface of the diaphragm 419.

  As shown in FIG. 13, a ring-shaped seal member 527 is disposed in a space surrounded by the first body 507, the core 432, and the operating rod 417. The seal member 527 is configured by concentrically assembling a seal ring 530 and a ring spring 532 both forming a circular ring shape. The seal ring 530 is made of a fluororesin such as Teflon (registered trademark), for example, and has a small friction coefficient and a predetermined hardness and flexibility. The seal ring 530 is provided with a notch 533 having a predetermined interval (for example, about 100 μm) in a part of the circumferential direction thereof, and can be bent by a predetermined amount in the inner diameter direction by the gap. On the other hand, the ring spring 532 is configured as a C-ring having a small radial thickness. As shown in the drawing, the ring spring 532 is externally fitted to the seal ring 530, whereby the ring spring 532 applies a radially inward biasing force to the seal ring 530. As a result, the seal ring 530 is bent slightly inward in the radial direction, and the clearance with the operation rod 417 to be inserted is made substantially zero. Thus, since the seal ring 530 is made of a low friction material, the sliding performance of the operating rod 417 can be improved. In addition, the ring spring 532 is selected to have a spring constant that allows an appropriate biasing force to be applied so as to ensure good slidability of the operating rod 417. On the other hand, a gap of a predetermined amount (for example, about 50 μm) is provided between the inner peripheral portion 85 of the open end of the core 32 and the operating rod 417, but the refrigerant passage is substantially arranged by the arrangement of the seal ring 530. Only the interval between the notches 533 is formed. For this reason, the leakage of the refrigerant from the space 535 to the pressure chamber 28 side, that is, the outflow of pressure can be minimized.

  Returning to FIG. 12, in the present embodiment, an O-ring 515 is fitted so as to be sandwiched between the case 531 of the solenoid 503 and the connector housing 582 of the connector 581. The O-ring 515 has a function that combines the O-ring 115 and the O-ring 125 shown in FIG. That is, the O-ring 515 restricts the entry of the external atmosphere into the gap between the case 531 and the mounting hole 152 when the control valve 501 is accommodated in the mounting hole 152 (see FIG. 4) with the connector 581 assembled. In addition, the entry of the external atmosphere into the gap between the case 531 and the connector housing 582 is restricted.

  As mentioned above, although the further embodiment of this invention was described, it cannot be overemphasized that various deformation | transformation is possible like the 1st Embodiment. FIG. 14 is a partially enlarged cross-sectional view illustrating a configuration of a control valve unit according to a modification of the second and third embodiments. (A) represents one modification thereof, and (B) represents another modification.

  In the modification of FIG. 5A, an O-ring 615 having a stepped cross section is fitted so as to be sandwiched between the case 531 and the connector housing 681. The O-ring 515 includes a first seal portion disposed in the gap between the case 531 and the attachment hole 152 and a second seal portion disposed between the case 531 and the connector housing 681.

The modified example of FIG. 5B includes an O-ring 115 disposed in the gap between the case 531 and the mounting hole 152, and an O-ring 625 disposed between the case 531 and the connector housing 682.
In the second and third embodiments, one mode of the seal member 527 is shown, but other configurations may be adopted. FIG. 15 is a diagram illustrating a configuration of a seal member according to still another modification. (A) represents a plan view of the seal member, and (B) represents a configuration of a seal ring constituting the seal member.
That is, the seal member 727 of this modification is not provided with a notch 533 parallel to the axis of the seal ring 530 like the seal member 527 shown in FIG. 13, but as shown in the upper part of FIG. A notch 733 is provided so as to intersect the axis of the seal ring 730. Since the differential pressure in the axial direction acts on the seal ring 730, the notch 733 is closed as shown in the lower part of FIG. On the other hand, since there is an interval between the notches 733, the inward deformation in the radial direction is secured. With such a configuration, leakage of the high-pressure refrigerant through the clearance between the opening end inner peripheral portion 85 and the operating rod 417 can be further suppressed. The notch shape is not limited to the diagonal shape, and other shapes such as a staircase shape may be employed.

It is sectional drawing which shows the structure of the control valve unit which concerns on embodiment. It is a partial expanded sectional view corresponding to the upper half part of FIG. It is arrow sectional drawing of the control valve unit of FIG. It is a figure showing the assembly method of a control valve unit. It is a figure showing the state in which the control valve unit was accommodated in the compressor. It is sectional drawing of the control valve unit concerning a 1st modification. It is sectional drawing of the control valve unit concerning a 2nd modification. It is sectional drawing of the control valve unit concerning 2nd Embodiment. It is a partial expanded sectional view corresponding to the upper half part of FIG. It is explanatory drawing showing the structure of a connector. It is a figure showing the structure of the bobbin which comprises a solenoid. It is sectional drawing of the control valve unit concerning 3rd Embodiment. It is the elements on larger scale showing the structure and arrangement | positioning of the sealing member arrange | positioned inside a control valve. It is a partial expanded sectional view showing the structure of the control valve unit concerning the modification of 2nd and 3rd embodiment. It is a figure showing the structure of the sealing member concerning another modification.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Control valve, 2 Valve body, 3 Solenoid, 5 Body, 6 Power element, 15 Valve hole, 16 Valve seat, 17 Actuation rod, 19 Diaphragm, 20 Valve body, 31 Case, 32 Core, 33 Plunger, 34 Electromagnetic coil, 36 shaft, 37 bobbin, 42 terminal lead-out part, 43 mated part, 45 conductive terminal, 46 locking hole, 101 connector, 102 connector housing, 104 connection terminal, 106 claw part, 110 rubber bush, 112 harness, 115 O Ring, 121 connector, 122 connector housing, 124 connection terminal, 125 O ring, 150 housing, 152 mounting hole, 154 C ring, 201 control valve, 203 solenoid, 210 case, 301 control valve 303 solenoid, 310 case, 401 control valve, 402 valve body, 403 solenoid, 405 body, 406 power element, 407 first body, 408 second body, 417 operating rod, 418 transmission rod, 419 diaphragm, 420 valve body, 421 Valve body part, 422 Valve seat part, 431 Case, 441 Bobbin, 481 Connector, 482 Connector housing, 483 Connection terminal, 484 Claw part, 485 Fit hole, 486 Slit, 490 Shaft end part, 491 Terminal formation part, 492 Slit, 493 drawer passage, 497 locking hole, 501 control valve, 502 valve body, 503 solenoid, 507 first body, 515 O-ring, 527 seal member, 531 case, 5 5 space, 581 connector, 582 a connector housing, 615 O-ring, 625 O-ring, 681 connector housing 682 connector housing.

Claims (15)

A control valve configured by assembling a valve main body and a solenoid, and accommodated from the valve main body side in a mounting hole formed in a housing of the target device in order to control the flow rate of the working fluid flowing through the internal passage of the target device; ,
A connection terminal for supplying power that can be connected to the conductive terminal of the solenoid; and a connector housing made of a corrosion-resistant member that is fixedly connected to the control valve and is detachably connected to the control valve. A connector arranged so that the connector housing seals the opening of the mounting hole when housed in the mounting hole;
A seal member that is fitted around the connection portion between the control valve and the connector, and restricts intrusion of an external atmosphere into the mounting hole when the control valve is accommodated in the mounting hole;
A control valve unit comprising:   The control valve controls at least one of a refrigerant flow rate introduced into the crank chamber from a discharge chamber of the variable capacity compressor as the target device and a refrigerant flow rate led out from the crank chamber to the suction chamber to thereby perform the variable capacity compression. The control valve unit according to claim 1, wherein the control valve unit is configured as a control valve for a variable capacity compressor that changes a discharge capacity of the machine. The conductive terminal and the fitted part are extended on the opposite side of the solenoid from the valve body,
The connector housing includes a bottomed cylindrical housing main body, a fitting portion provided in an opening of the housing main body, and the connection terminal fixed inside the housing main body and disposed to face the conductive terminal. Have
The connector is fixed to the control valve when the connection terminal is detachably connected to the conductive terminal and the fitting portion is detachably fitted to the fitted portion. The control valve unit according to claim 1 or 2.   The control valve unit according to claim 3, wherein the connector is fixed to the control valve so as to accommodate a connection portion between the connection terminal and the conductive terminal in an internal space of the housing body.   The seal member is fitted to the outer peripheral surface of the connector housing, and when the control valve is housed in the mounting hole in a state where the connector is assembled, the seal member is externally connected to a connection portion between the connector and the control valve. The control valve unit according to any one of claims 1 to 4, wherein the intrusion of the atmosphere is restricted.   The seal member is fitted to an outer peripheral surface of a connector side end portion of the solenoid case, and when the control valve is accommodated in the mounting hole in a state where the connector is assembled, an external atmosphere is formed between the case and the case. The control valve unit according to any one of claims 1 to 4, wherein intrusion into the inside of the mounting hole is restricted through a gap with the mounting hole.   In the gap between the connector side end portion of the case and the opening end portion of the connector housing, a second seal member for restricting entry of an external atmosphere into the connector housing is disposed. The control valve unit according to claim 6. A control valve that is integrally provided with a valve main body and a solenoid, and is accommodated from the valve main body side in a mounting hole formed in the housing of the target device in order to control the flow rate of the working fluid flowing through the internal passage of the target device A connector connected to supply power to the solenoid,
A connection terminal for power supply connectable to the conductive terminal of the solenoid;
A connector housing made of a corrosion-resistant member fixed to the connection terminal and detachably connected to the solenoid;
A seal member fitted to the connector housing in the vicinity of the connecting portion with the solenoid,
The connector is arranged so that the connector housing seals the opening of the mounting hole when the control valve is accommodated in the mounting hole. The connector housing includes a bottomed cylindrical housing main body, a fitting portion provided in an opening of the housing main body, and the connection terminal fixed inside the housing main body and disposed to face the conductive terminal. Have
The connection terminal is detachably connected to the conductive terminal, and the fitting portion is detachably fitted to a fitted portion provided in the solenoid, thereby connecting the connection terminal and the conductive terminal. The connector according to claim 8, wherein the connector is fixed to the control valve so as to be accommodated in an internal space of the housing body.   The seal member is fitted to the outer peripheral surface of the connector housing, and restricts the entry of an external atmosphere into the mounting hole when the control valve is housed in the mounting hole with the connector assembled. The connector according to claim 8 or 9, wherein: A non-magnetic terminal forming part protrudes on the opposite side of the solenoid from the valve body,
The conductive terminal is configured by winding a distal end portion of an electromagnetic coil of the solenoid around the terminal forming portion,
The said connection terminal is connected to the said conductive terminal so that it may fit in the winding part of the said electromagnetic coil wound around the said terminal formation part, The Claim 1 characterized by the above-mentioned. Control valve unit. The terminal forming portion is provided integrally with a shaft end opposite to the valve body of the bobbin around which the electromagnetic coil is wound,
The control according to claim 11, wherein a pull-out passage for pulling out a tip end portion of an electromagnetic coil wound around the bobbin to the terminal forming portion side is formed at a shaft end portion of the bobbin. Valve unit. The tip of the electromagnetic coil is wound around the outer peripheral surface of the terminal forming part,
A slit having a predetermined depth is formed at the tip of the connection terminal,
The connection terminal is connected to the conductive terminal so that the slit is fitted to the terminal forming portion, and the tip portion thereof is deformed in the width direction of the slit along with the fitting, thereby the tip portion. The control valve unit according to claim 12 or 13, wherein the control valve unit is fixed so as to be caught by a locking portion provided in the terminal forming portion.   The seal member is fitted so as to be sandwiched between a connector-side end portion of the solenoid case and a case-side end portion of the connector housing, and the attachment hole is mounted in a state where the control valve is assembled to the connector. When the housing is housed, the entry of the external atmosphere into the gap between the case and the mounting hole is restricted, and the entry of the external atmosphere into the gap between the case and the connector housing is restricted. The control valve unit according to claim 1.   The control valve unit according to claim 7, wherein the seal member and the second seal member are integrally formed.

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