CN110631297B

CN110631297B - Control valve and refrigeration cycle system provided with same

Info

Publication number: CN110631297B
Application number: CN201910465570.0A
Authority: CN
Inventors: 土井琢郎
Original assignee: Saginomiya Seisakusho Inc
Current assignee: Saginomiya Seisakusho Inc
Priority date: 2018-06-22
Filing date: 2019-05-30
Publication date: 2021-06-01
Anticipated expiration: 2039-05-30
Also published as: CN110631297A; JP2019219048A; JP6974899B2

Abstract

The invention can accurately position and reliably and easily fix an electromagnetic actuator to a valve main body in a control valve in which the electromagnetic actuator is supported by the valve main body. A movable piece (14M) of a band-shaped bracket member (14) arranged on a stator coil unit (10) has a positioning projection (14N) engaged with a recess (24ai) of a stator coil unit support part (24) of a center part (20) of an electric valve (3), and when the top part of the positioning projection (14N) having a rounded tip is pushed into the recess (24ai) of the stator coil unit support part (24) to be engaged with the peripheral edge of the recess (24ai), the end parts (14Na) and (14Nb) of the positioning projection (14N) forming part of a notch part (14Ka) are engaged with the peripheral edge of the recess (24ai), and the end parts (14Nc) and (14Nd) of the positioning projection (14N) forming part of a notch part (14Kb) are engaged with the peripheral edge of the recess (24 ai).

Description

Control valve and refrigeration cycle system provided with same

Technical Field

The present invention relates to a control valve in which an electromagnetic actuator is supported by a valve main body, and a refrigeration cycle including the control valve.

Background

In the refrigeration cycle, an electrically operated valve as an expansion valve is disposed between the condenser and the evaporator, and is used for flow rate control of the refrigerant and the like. As shown in patent document 1, for example, a stepping motor type electric valve as such a fluid control valve is configured to include the following main elements: an electromagnetic driver driving the rotor; and a valve body which accommodates therein a screw feed mechanism coupled to the rotor, a valve body coupled to a male screw member of the screw feed mechanism, and the like. A housing main body of a ring-shaped electromagnetic actuator having an electromagnetic coil inside is supported by a drive housing main body forming a valve main body. The housing main body of the electromagnetic actuator has a fitting hole through which the drive housing main body is inserted. Further, the convex bracket engaging portion of the curved engaging portion of the bracket fixed to the housing body engages with the concave engaging portion of the valve body housing formed at the lower end of the drive housing body.

In the above configuration, when the electromagnetic actuator is assembled to the valve body, the upper portion of the drive housing body is inserted into the mounting hole of the electromagnetic actuator against the elastic force of the curved latching portion itself, and then the convex bracket latching portion of the curved latching portion is engaged with and pressed against the concave engaging portion of the valve body housing by the restoring force thereof. Thus, the housing body of the electromagnetic actuator is positioned in the valve cartridge housing of the valve body.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2017-15104

Disclosure of Invention

Problems to be solved by the invention

In some cases, it is desirable to control the opening degree of a valve element for opening and closing the valve port of the electric valve within a small opening degree range in order to accurately maintain the flow rate of the refrigerant. The motor-operated valve having the electromagnetic actuator incorporated in the valve body as described above is usually mounted in an outdoor unit of an air conditioner or the like.

More specifically, as shown in fig. 10(a) and (B), for example, such an electrically operated valve includes: a valve driving section that drives the valve element unit in cooperation with the stator coil unit 1; a valve body 9 connected to an end of the rotor case and having a valve seat (not shown) therein opened and closed by a tip end of a valve element (not shown); and a valve element unit that is disposed in the valve body 9 and includes a valve element that opens and closes a valve seat. The valve body 9 has a valve body accommodating portion formed with: a first port connected to one end of a connecting pipe 13 as a first passage on an axis substantially orthogonal to the center axis of the valve body; a second port connected to one end of a connecting pipe 17 as a second passage on an axis common to the center axis of the valve body; and a valve seat in communication with the second port. A portion of the outer peripheral portion of the valve body 9 facing a portion to which one end of the pipe 13 for connection is joined and a stator coil unit support portion formed around the portion have a plurality of substantially hemispherical recesses 9ai (i is 1 to 3) at predetermined intervals in the circumferential direction. Each of the recesses 9ai, into which the positioning protrusion 7N of the bracket member 7 described later selectively engages, has a substantially semicircular cross section having a predetermined depth. The stator coil unit 1 includes: a bobbin 11 that holds a coil (not shown) to which power is supplied via a lead 15; a bracket member 7 that is supported by the

legs

11A and 11B of the bobbin 11 and positions the housing 1C at a predetermined position with respect to the stator coil unit supporting portion; and a case 1C for accommodating the bobbin 11 with a sealing material interposed therebetween. The case 1C has an inner housing portion for housing the bobbin 11 and the coil therein. The band-shaped bracket member 7 is made of, for example, a thin plate metal material, and includes: a fixed end portion 7F fixed to the inner peripheral portion of the case 1C; a movable piece part 7M having a positioning protrusion 7N engaged with the recess 9ai of the stator coil unit support part and capable of elastic displacement; and a connecting piece portion 7C connecting the other end portion of the movable piece portion 7M and the fixed end portion 7F.

Since the hemispherical recess 9ai (concave engaging portion) of the valve body portion 9 of the valve body 19 is formed on the curved surface of the outer periphery of the cylindrical valve body 19, as shown in fig. 10C and E, unlike the case where the hemispherical recess 9ai is press-formed on a flat plate, the entire peripheral edge of the recess 9ai is not on a common plane, and a part of the peripheral edge 9s of the recess 9ai is formed to be curved in the circumferential direction of the valve body 19. As a result, the outer peripheral edge of the positioning projection 7N (the convex bracket locking portion of the curved locking portion) of the bracket member 7 may abut against the peripheral edge 9s of the recess 9ai, which is elliptical when viewed from the direction indicated by the arrow XD as shown in fig. 10D, only at two positions of the abutting portions Ta and Tb along the central axis of the valve body 9 as shown in fig. 10C, and gaps CLA and CLB may be formed between the outer peripheral portion of the positioning projection 7N and the peripheral edge 9s of the recess 9ai in the circumferential direction of the valve body 9 in the valve body 19 as shown in fig. 10E.

In such a case, the assembled electromagnetic actuator has a play in the circumferential direction with respect to the valve main body. As a result, the circumferential position of the valve body of the electromagnetic actuator with respect to the valve body housing may be displaced in the direction indicated by the arrow in fig. 10(E) within the range of the play due to vibration of the outdoor unit or the like. As a result, there is a possibility that a deviation of the valve opening degree of the valve body with respect to the valve port occurs at a predetermined number of driving pulses, and a desired flow rate characteristic corresponding to a minute opening degree range of the valve body cannot be obtained. In this case, it is also conceivable to increase the pressing force of the convex bracket locking portion of the bent locking portion so that the circumferential position of the housing main body of the electromagnetic actuator with respect to the valve body housing of the valve main body does not deviate from a predetermined position.

However, it is not preferable to increase the pressing force of the positioning projection 7N (convex bracket locking portion of the curved locking portion) of the bracket member 7, which makes it difficult to manually assemble the electromagnetic actuator to the valve main body.

In view of the above problems, an object of the present invention is to provide a control valve in which an electromagnetic actuator is supported by a valve main body, and a refrigeration cycle including the control valve, and a control valve in which the electromagnetic actuator can be accurately positioned and reliably and easily fixed to the valve main body, and a refrigeration cycle including the control valve.

Means for solving the problems

In order to achieve the above object, a control valve according to the present invention includes: a valve body section including a housing section having a first port connected to the first passage and a second port connected to the second passage and movably housing a valve element unit, the valve element unit being communicated with the first port and the second port and including a valve element for controlling opening and closing of a valve port provided in a valve seat of the second port; an electromagnetic actuator including a stator coil unit that operates a drive mechanism that causes a valve element unit to perform an operation of opening and closing a valve port of a valve seat to adjust a flow rate of a fluid passing between a tip portion of the valve element and a periphery of the valve port of the valve seat; and an elastically deformable bracket member disposed on the electromagnetic actuator, for positioning and holding the stator coil unit on the stator coil unit support portion, wherein the bracket member has at least one positioning protrusion engaged with a peripheral edge of at least one recess on the stator coil unit support portion, and a peripheral edge and an outer peripheral portion of at least one cutout of the positioning protrusion are engaged with peripheral edges of the recess at least three locations along a circumferential direction and an axial direction of the stator coil unit support portion.

The positioning protrusion of the bracket member may be provided on the periphery of the inner peripheral portion of the stator coil unit, and the stator coil unit support portion may be formed on the outer peripheral portion of the rotor case. The positioning protrusion of the bracket member may be provided at a position apart from the end of the stator coil unit, and the stator coil unit support portion may be formed on the outer peripheral portion of the valve main body.

The cutout portions of the positioning protrusion may be formed at two locations separated from each other in the axial direction of the stator coil unit supporting portion.

The shape of the cutout portion of the positioning protrusion may be substantially fan-shaped or substantially arcuate when the cutout portion is viewed from a plane including the central axis of the bobbin, and the bobbin may constitute a part of the stator coil unit facing the positioning protrusion. The notch of the positioning projection may be formed only on one side of the outer periphery of the positioning projection along the center axis of the bobbin.

The refrigeration cycle of the present invention is characterized by comprising an evaporator, a compressor, and a condenser, and the control valve is provided in a pipe disposed between an outlet of the condenser and an inlet of the evaporator.

Effects of the invention

According to the control valve of the present invention and the refrigeration cycle system including the control valve, the electromagnetic actuator and the elastically deformable bracket member that is disposed in the electromagnetic actuator and positions and holds the stator coil unit to the stator coil unit support portion are provided, the bracket member has at least one positioning protrusion that engages with the peripheral edge of at least one recess on the stator coil unit support portion, and the peripheral edge and the outer peripheral portion of at least one cutout portion of the positioning protrusion engage with the peripheral edge of the recess at least three locations along the circumferential direction and the axial direction of the stator coil unit support portion, and therefore, the electromagnetic actuator can be positioned with high accuracy to the valve main body and reliably and easily fixed.

Drawings

Fig. 1 is a perspective view showing a stator coil unit used in a first embodiment of a control valve of the present invention.

Fig. 2 is a perspective view showing a hub portion used in the first embodiment of the control valve of the present invention.

Fig. 3 is a view showing an external appearance of the first embodiment of the control valve of the present invention including a partial sectional view.

Fig. 4 is a partial sectional view taken along line IV-IV of fig. 3.

Fig. 5 is a partially enlarged view showing a part of fig. 4 in a partially enlarged manner.

Fig. 6(a), (B), and (C) are partially enlarged views showing a part of a modification of the bracket member shown in fig. 1.

Fig. 7 is a diagram schematically showing the configuration of an example of the refrigeration cycle to which the control valve of the present invention is applied according to the first to third embodiments.

Fig. 8(a) is a view showing an external appearance of a second embodiment of the control valve of the present invention including a partial cross-sectional view, and (B) is a view seen from a direction indicated by an arrow VIIIB in fig. 8 (a).

Fig. 9(a) is a view showing an external appearance of the third embodiment of the control valve of the present invention including a partial sectional view, and (B) is a sectional view taken along the IXB-IXB line of fig. 9 (a).

Fig. 10(a) is a diagram showing an external appearance of a conventional motor-operated valve including a partial cross-sectional view, (B) is a view seen from a direction indicated by an arrow XB in fig. 10(a), (C) is a partially enlarged view of a portion XC in the partial cross-sectional view in fig. 10(a), (D) is a diagram seen from a direction indicated by an arrow XD in fig. 10(a), and (E) is a partially enlarged view of a portion XE in the partial cross-sectional view in fig. 10 (B).

In the figure:

2-indoor heat exchanger, 3-electric valve, 4-compressor, 6-outdoor heat exchanger, 10, 40, 60-stator coil unit, 12-housing, 14, 34, 44, 54, 64-bracket member, 14M-movable piece, 14N, 34N, 44N, 54N, 64N-positioning protrusion, 14Ka, 14Kb, 34Ka, 34Kb, 44Ka, 54 Ka-notch, 22-rotor housing, 24-stator coil unit support, 24ai, 36ai, 52 ai-recess, 26-valve main body, 28, 30-connecting pipe.

Detailed Description

Fig. 3 shows a structure and a piping tube of a first embodiment of the control valve according to the present invention.

The control valve is a motor-operated valve 3, and is disposed between an outlet of an outdoor heat exchanger 6 during a cooling operation described later in a pipe of the refrigeration cycle and an inlet of the indoor heat exchanger 2, as shown in fig. 7. The motor-operated valve 3 is joined to the primary pipe Du1 through a later-described connecting pipe 28 and is joined to the secondary pipe Du2 through a connecting pipe 30 during the cooling operation. The primary pipe Du1 connects the outlet of the outdoor heat exchanger 6 to the motor-operated valve 3, and the secondary pipe Du2 connects the inlet of the indoor heat exchanger 2 to the motor-operated valve 3. Between the outlet of the indoor heat exchanger 2 and the inlet of the outdoor heat exchanger 6, a pipe Du3 joined to the outlet of the indoor heat exchanger 2, a flow path switching valve 8, and a pipe Du6 joined to the inlet of the outdoor heat exchanger 6 are arranged, and the compressor 4 is joined to the flow path switching valve 8 through the pipe Du4 and the pipe Du 5. The other end of the pipe Du3 is joined to the port 8b of the flow path switching valve 8. The other end of the pipe Du6 is joined to the port 8d of the flow path switching valve 8. One end of the pipe Du4 is connected to the port 8c of the flow path switching valve 8, and the other end of the pipe Du4 is connected to the suction port of the compressor 4. One end of the pipe Du5 is connected to the port 8a of the flow path switching valve 8, and the other end of the pipe Du5 is connected to the discharge port of the compressor 4. During the cooling operation, the port 8a communicates with the port 8d, and the port 8b communicates with the port 8 c. Thus, during the cooling operation, the refrigerant in the refrigeration cycle circulates in the direction indicated by the arrow R shown in fig. 7, for example, and the outdoor heat exchanger 6 functions as a condenser and the indoor heat exchanger 2 functions as an evaporator.

On the other hand, during the heating operation, the flow path switching valve 8 is switched so that the port 8a and the port 8b of the flow path switching valve 8 communicate with each other and the port 8c and the port 8d communicate with each other. Thus, during the heating operation, the refrigerant in the refrigeration cycle circulates in the direction indicated by the arrow F shown in fig. 7, for example, and the indoor heat exchanger 2 functions as a condenser and the outdoor heat exchanger 6 functions as an evaporator. The control unit, not shown, controls the driving of the compressor 4 and the motor-operated valve 3, and controls the switching of the flow path switching valve 8.

As shown in fig. 3, the motor-operated valve 3 includes: a valve driving unit that drives a valve element unit described later in cooperation with the stator coil unit 10; a valve body 26 that is connected to an end of the rotor case 22 via the stator coil unit support portion 24 and has a valve seat (not shown) therein that is opened and closed by a tip end of a valve body (not shown); and a valve element unit that is disposed in the valve body 26 and includes a valve element that opens and closes a valve seat. As shown in fig. 2, the center portion 20 of the motor-operated valve 3 includes a valve driving portion, a stator coil unit supporting portion 24, and a valve main body portion 26.

The valve driving unit includes, as main components: a male screw shaft (not shown) which is disposed in a cylindrical rotor case 22 having a closed end and moves the valve element unit up and down; an internal thread member having an internal thread portion fitted to the external thread shaft, fixed to the valve main body portion 26, and guiding the valve element unit in a liftable manner; a rotor (not shown) which is fixed to the guide shaft portion of the male screw shaft, is rotatably supported, and is magnetized; and a stator coil unit 10 that is disposed on an outer peripheral portion of the rotor case 22 and rotates the rotor.

The valve driving unit is controlled based on a driving pulse signal supplied from a control unit, not shown, to the stator coil unit 10.

Although not shown in the drawings, the valve body unit includes, as main elements: a needle-like valve element that opens and closes a valve port of the valve seat; a cylindrical spring receiving member that cooperates with the washer to engage the protruding portion of the connection portion of the male screw shaft with the inner peripheral edge of the opening end portion of the valve body case; a coil spring which is arranged between the extending part of the spring bearing component and the annular flat part for bearing the spring at one end of the valve core and applies force to the direction of separating the two parts; and a cylindrical valve element housing which houses the spring receiving member, the coil spring, and one end of the valve element.

As shown in fig. 2, the valve body portion 26 is made of a metal material, for example, brass, stainless steel, an aluminum alloy, or a resin material, and has a valve element accommodating portion inside which the lower end of the female screw member, the other end of the valve element, and the cylindrical valve element housing are accommodated. In the spool accommodation portion, the other end of the spool protrudes toward the valve port. Further, the valve body housing portion is formed with: a first port connected to one end of a connecting pipe 28 as a first passage on an axis substantially orthogonal to the center axis of the valve body; a second port connected to one end of a connecting pipe 30 as a second passage on an axis common to the center axis of the valve body; and a valve seat in communication with the second port.

As shown in fig. 2 and 3, the stator coil unit support portion 24 formed continuously with the lower end of the rotor case 22 has a plurality of substantially circular recesses 24ai (i is 1 to 5) at predetermined intervals in the circumferential direction. Each recess 24ai, into which a positioning protrusion 14N of a bracket member 14 in the stator coil unit 10 described later selectively engages, has a substantially semicircular cross section having a predetermined depth. By forming the plurality of recesses 24ai in this way, the relative position of the stator coil unit 10 with respect to the stator coil unit support portion 24 can be selectively changed.

As shown in fig. 1 and 4, a stator coil unit 10 constituting a main part of an electromagnetic driver includes: a bobbin 18 that holds the coil 16; a bracket member 14 that is supported on the bobbin 18 and positions the housing 12 at a predetermined position with respect to the stator coil unit supporting portion 24; and a case 12 accommodating the bobbin 18 and the bracket member 14 inside.

The housing 12 and the bobbin 18 have a hole 12a and a hole 18a, respectively, in the center portion concentrically for inserting the outer periphery of the rotor housing 22. The case 12 has a housing portion 12A that houses the bobbin 18 and the coil 16. A hole 12A formed at the upper end of the housing 12 communicates with the accommodating portion 12A. As shown in fig. 1 and 4, a substantially annular groove 18B into which the stator coil unit support portion 24 is inserted is formed concentrically with the hole 18a of the bobbin 18 over the entire periphery of one open end of the hole 18a of the bobbin 18. At this time, in the groove 18B, the bracket member 14 is disposed on the enlarged portion 18be partially expanded toward the inner peripheral portion of the housing 12. As shown in fig. 1, the enlarged portion 18be extends in the circumferential direction of the groove 18B so as to have a predetermined central angle θ from the position of the groove 18B facing the locking wall 18W of the bobbin 18 to which the fixed end portion 14F of the bracket member 14 to be described later is locked. The center angle θ of the enlarged portion 18be is set to about 135 °, for example. Further, the periphery of the bobbin 18 in the housing portion 12A is sealed with a sealing material.

As shown in fig. 1, the bracket member 14 is made of, for example, a sheet metal material, and includes: an end piece portion 14E of the abutting portion 18b1 abutting on the inner peripheral surface of the enlarged portion 18be of the bobbin 18; a fixed end portion 14F locked to a locking wall 18W of the bobbin 18; and a movable piece portion 14M connecting the end piece portion 14E and the fixed end portion 14F. One end of the end piece portion 14E is formed by bending in a U-shape toward the contact portion 18b 1. The other end of the end piece portion 14E connected to the one end of the movable piece portion 14M abuts against the abutting portion 18b2 on the inner peripheral surface of the enlarged portion 18be, which is distant from the abutting portion 18b 1. The fixed end portion 14F connected to the other end of the movable piece portion 14M is held by the vertical surface 18b3 of the locking wall 18W of the bobbin 18 connected to the slit 18 SL.

As shown in fig. 1 and 4, the band-shaped movable piece portion 14M has a positioning protrusion portion 14N that engages with the recess 24ai of the stator coil unit supporting portion 24. As viewed in the direction indicated by arrow U in fig. 4, the positioning protrusion 14N having a substantially pointed shape with a rounded top portion protrudes by a predetermined height toward the center axis of the groove 18B, that is, the center axis of the hole 18a of the bobbin 18. As partially enlarged in fig. 5, both circumferential ends of the movable piece portion 14M of the positioning projection portion 14N are integrally formed with the movable piece portion 14M, and cutout portions 14Ka and 14Kb (hatched portions in fig. 5) having a substantially fan shape are formed at both width-direction ends of the movable piece portion 14M of the positioning projection portion 14N, respectively, when viewed from a plane including the center axis of the hole 18a of the bobbin 18. The central angle α of the fan shape of the cutout portion 14Ka as viewed from the central axis of the hole 18a of the bobbin 18 shown in fig. 5 is preferably set to 60 ° or more and 150 ° or less, for example. The center angle β of the cutout portion 14Kb shown in fig. 5 as viewed from the center axis of the hole 18a of the bobbin 18 is preferably set to 60 ° or more and 150 ° or less, for example. The shape of the cutout portions 14Ka and 14Kb is not limited to the above example, and may be formed in fan shapes having different central angles.

Thus, when the rounded top portion of the positioning projection 14N having the distal end portion is pushed into the recess 24ai of the stator coil unit supporting portion 24 by the reaction force due to the pressing force applied by the abutting portion 18b2 on the inner peripheral surface of the enlarged portion 18be and is engaged with the peripheral edge of the recess 24ai, the end portions 14Na and 14Nb of the positioning projection 14N forming part of the notch portion 14Ka are engaged with the peripheral edge of the recess 24ai, and the end portions 14Nc and 14Nd of the positioning projection 14N forming part of the notch portion 14Kb are engaged with the peripheral edge of the recess 24 ai. The positions of the end portions 14Na and 14Nb are symmetrical with each other with respect to the central axis of the bobbin 18, and the positions of the end portions 14Nc and 14Nd are symmetrical with respect to the central axis (symmetry axis) of the bobbin 18. The positions of the ends 14Na and 14Nd and the positions of the ends 14Nb and 14Nc are symmetrical to each other with respect to a straight line (symmetry axis) orthogonal to the central axis of the bobbin 18.

Accordingly, the position of the positioning projection 14N of the bracket member 14 with respect to the recess 24ai of the stator coil unit support portion 24 is reliably positioned in a state in which the position is restrained without a gap in the circumferential direction and the axial direction of the coil frame 18 by the equal component force based on the pressing force of the positioning projection 14N by the end portion 14Na, the end portion 14Nb, the end portion 14Nc, and the end portion 14Nd, and therefore, the position of the positioning projection 14N can be prevented from being displaced in the circumferential direction and the axial direction of the coil frame 18 due to, for example, vibration generated in the outdoor unit. Further, a portion between end 14Na and end 14Nd of positioning protrusion 14N, or a portion between end 14Nb and end 14Nc may contact the peripheral edge of pocket 24 ai.

In fig. 5, the shape of the cutout portions 14Ka and 14Kb of the band-shaped movable piece portion 14M of the bracket member 14 is a fan shape when viewed from a plane including the center axis of the hole 18a of the bobbin 18, but the present invention is not limited to the above example, and for example, as shown in fig. 6(a) in a partially enlarged view, the shape of the cutout portions 34Ka and 34Kb of the band-shaped movable piece portion 34M of the bracket member 34 may be an arc shape when viewed from a plane including the center axis of the hole 18a of the bobbin 18.

The bracket member 34 is made of, for example, a sheet metal material, and includes: an end piece portion of the abutting portion 18b1 abutting against the inner peripheral surface of the enlarged portion 18be of the bobbin 18; a fixed end portion locked to a locking wall 18W of the bobbin 18; and a movable piece portion 34M connecting the distal end piece portion and the fixed end portion. One end of the end piece is bent in a U-shape toward the contact portion 18b 1. The other end of the tip piece connected to the one end of the movable piece portion 34M abuts against the abutting portion 18b2 on the inner peripheral surface of the enlarged portion 18be, which is apart from the abutting portion 18b 1. The fixed end portion connected to the other end of the movable piece portion 34M is held by the vertical surface 18b3 of the locking wall 18W of the bobbin 18 connected to the slit 18 SL.

As shown in fig. 6(a), the band-shaped movable piece portion 34M has a positioning projection portion 34N that engages with the recess 24ai of the stator coil unit supporting portion 24. The positioning projection 34N having a rounded top portion projects a predetermined height toward the center axis of the groove 18B, that is, the center axis of the hole 18a of the bobbin 18, as viewed in the direction indicated by the arrow U in fig. 4. Both ends in the circumferential direction of the movable piece portion 34M of the positioning projection 34N are integrally formed with the movable piece portion 34M, and on the other hand, both ends in the width direction of the movable piece portion 34M of the positioning projection 34N are formed with substantially arcuate cutout portions 34Ka and 34Kb (hatched portions in fig. 6 a) when viewed directly from a plane including the center axis of the hole 18a of the bobbin 18.

Thus, when the rounded top portion of the positioning projection 34N having the tip end portion is pushed into the recess 24ai of the stator coil unit supporting portion 24 by the reaction force due to the pressing force exerted by the abutting portion 18b2 on the inner peripheral surface of the enlarged portion 18be and is engaged with the peripheral edge of the recess 24ai, the end portions 34Na and 34Nb of the positioning projection 34N forming part of the notch portion 34Ka are engaged with the peripheral edge of the recess 24ai, and the end portions 34Nc and 34Nd of the positioning projection 34N forming part of the notch portion 34Kb are engaged with the peripheral edge of the recess 24 ai. The positions of the end portions 34Na and 34Nb are symmetrical with each other with respect to the central axis of the bobbin 18, and the positions of the end portions 34Nc and 34Nd are symmetrical with each other with respect to the central axis (symmetry axis) of the bobbin 18. The positions of the ends 34Na and 34Nd and the positions of the ends 34Nb and 34Nc are symmetrical with respect to a straight line (symmetry axis) orthogonal to the central axis of the bobbin 18.

Accordingly, the position of the positioning projection 34N of the bracket member 34 with respect to the recess 24ai of the stator coil unit support portion 24 is reliably positioned in a state in which the position is restrained without a gap in the circumferential direction and the axial direction of the coil frame 18 by the equal component force based on the pressing force of the positioning projection 34N by the end portion 34Na, the end portion 34Nb, the end portion 34Nc, and the end portion 34Nd, and therefore, the position of the positioning projection 34N can be prevented from being displaced in the circumferential direction and the axial direction of the coil frame 18 due to, for example, vibration generated in the outdoor unit. Further, a portion between end 34Na and end 34Nd of positioning projection 34N, or a portion between end 34Nb and end 34Nc may be in contact with the peripheral edge of pocket 24 ai.

Further, in the example shown in fig. 5 and 6(a), the positions of the

positioning projections

14N and 34N with respect to the recesses 24ai of the stator coil unit supporting portion 24 are defined by four end portions, by reliably positioning the coil frame 18 in a state of being restrained without a gap in the circumferential direction and the axial direction thereof by the uniform component force of the pressing force based on the

positioning protrusions

14N and 34N, for example, as shown in fig. 6(B) and (C), the positions of the

positioning protrusions

44N and 54N with respect to the recesses 24ai of the stator coil unit support portion 24 may be defined by three end portions, the uniform component force of the pressing force based on the

positioning protrusions

44N and 54N reliably positions the coil frame 18 in a state of being restrained without a gap in the circumferential direction and the axial direction.

In fig. 6(B), the bracket member 44 is made of, for example, a thin plate metal material, and includes: an end piece portion of the abutting portion 18b1 abutting against the inner peripheral surface of the enlarged portion 18be of the bobbin 18; a fixed end portion locked to a locking wall 18W of the bobbin 18; and a movable piece portion 44M connecting the distal end piece portion and the fixed end portion. One end of the end piece is bent in a U-shape toward the contact portion 18B 1. The other end of the tip piece connected to the one end of the movable piece portion 44M abuts against the abutting portion 18b2 on the inner peripheral surface of the enlarged portion 18be, which is apart from the abutting portion 18b 1. The fixed end portion connected to the other end of the movable piece portion 44M is held by the vertical surface 18b3 of the locking wall 18W of the bobbin 18 connected to the slit 18 SL.

As shown in fig. 6(B), the band-shaped movable piece portion 44M has a positioning projection 44N that engages with the recess 24ai of the stator coil unit supporting portion 24. The positioning projection 44N having a rounded top portion projects a predetermined height toward the center axis of the groove 18B, that is, the center axis of the hole 18a of the bobbin 18, as viewed in the direction indicated by the arrow U in fig. 4. The positioning projection 44N is formed integrally with the movable piece 44M over the entire periphery thereof except for a substantially fan-shaped cutout 44Ka described later, and the substantially fan-shaped cutout 44Ka (hatched portion in fig. 6B) is formed only at one end in the width direction of the movable piece 44M of the positioning projection 44N when viewed from a plane including the center axis of the hole 18a of the bobbin 18.

Thus, when the rounded top portion of the positioning projection 44N having the tip end is pushed into the recess 24ai of the stator coil unit support portion 24 by the reaction force due to the pressing force exerted by the abutting portion 18b2 on the inner peripheral surface of the enlarged portion 18be and is engaged with the peripheral edge of the recess 24ai, the end portions 44Na and 44Nb of the positioning projection 44N forming part of the notch portion 44Ka are engaged with the peripheral edge of the recess 24ai, and the end portion 44Nc is engaged with the peripheral edge of the recess 24 ai. The positions of the end portions 44Na and 44Nb are symmetrical to each other with respect to the central axis of the bobbin 18, and the position of the end portion 44Nc is located at a position equally spaced from the end portions 44Na and 44Nb by a predetermined distance in the circumferential direction and opposed to the central axis (symmetrical axis) of the bobbin 18.

Accordingly, the position of the positioning projection 44N of the bracket member 44 with respect to the recess 24ai of the stator coil unit support portion 24 is reliably positioned in a state in which the position is restrained without a gap in the circumferential direction and the axial direction of the bobbin 18 by the end portion 44Na, the end portion 44Nb, and the end portion 44Nc, and the equal component force based on the pressing force of the positioning projection 44N, and therefore, the position of the positioning projection 44N can be prevented from being displaced in the circumferential direction and the axial direction of the bobbin 18 due to, for example, vibration generated in the outdoor unit. Further, a portion between end 44Na and end 44Nc of positioning protrusion 44N, or a portion between end 44Nb and end 44Nc may be in contact with the peripheral edge of pocket 24 ai.

In fig. 6(C), the bracket member 54 is made of, for example, a sheet metal material, and includes: an end piece portion of the abutting portion 18b1 abutting against the inner peripheral surface of the enlarged portion 18be of the bobbin 18; a fixed end portion locked to a locking wall 18W of the bobbin 18; and a movable piece 54M connecting the end piece and the fixed end. One end of the end piece is bent in a U-shape toward the contact portion 18B 1. The other end of the tip piece connected to the one end of the movable piece 54M abuts against the abutting portion 18b2 on the inner peripheral surface of the enlarged portion 18be, which is apart from the abutting portion 18b 1. The fixed end portion connected to the other end of the movable piece 54M is held by the vertical surface 18b3 of the locking wall 18W of the bobbin 18 connected to the slit 18 SL.

As shown in fig. 6(C), the band-shaped movable piece 54M has a positioning projection 54N that engages with the recess 24ai of the stator coil unit supporting portion 24. The positioning projection 54N having a rounded top portion projects a predetermined height toward the center axis of the groove 18B, that is, the center axis of the hole 18a of the bobbin 18, as viewed in the direction indicated by the arrow U in fig. 4. The positioning projection 54N is formed integrally with the movable piece 54M over the entire periphery thereof except for a positioning cutout 54N of a substantially arcuate shape (described later), and a substantially arcuate cutout 54Ka (hatched portion in fig. 6C) is formed only at one end in the width direction of the movable piece 54M of the positioning projection 54N when viewed from a plane including the center axis of the hole 18a of the bobbin 18.

Thus, when the rounded top portion of the positioning projection 54N having the tip end is pushed into the recess 24ai of the stator coil unit support portion 24 by the reaction force due to the pressing force exerted by the abutting portion 18b2 on the inner peripheral surface of the enlarged portion 18be and is engaged with the peripheral edge of the recess 24ai, the end portions 54Na and 54Nb of the positioning projection 54N forming part of the notch portion 54Ka are engaged with the peripheral edge of the recess 24ai, and the end portion 54Nc is engaged with the peripheral edge of the recess 24 ai. The positions of the end portions 54Na and 54Nb are symmetrical to each other with respect to the central axis of the bobbin 18, and the position of the end portion 54Nc is located at a position equally spaced apart from the end portions 44Na and 44Nb by a predetermined distance in the circumferential direction and opposed to the central axis (symmetrical axis) of the bobbin 18.

Accordingly, the position of the positioning projection 54N of the bracket member 54 with respect to the recess 24ai of the stator coil unit support portion 24 is reliably positioned in a state in which the position is restrained without a gap in the circumferential direction and the axial direction of the bobbin 18 by the end portions 54Na, 54Nb, and 54Nc, and the equal component force based on the pressing force of the positioning projection 54N, and therefore, the position of the positioning projection 54N can be prevented from being displaced in the circumferential direction and the axial direction of the bobbin 18 due to, for example, vibration generated in the outdoor unit. Further, a portion between end 54Na and end 54Nc of positioning protrusion 54N, or a portion between end 54Nb and end 54Nc may be in contact with the peripheral edge of pocket 24 ai.

In fig. 6(a) and (C), the shape of the notch portions 34Ka and 34Kb of the band-shaped

movable piece portions

34M and 54M of the

bracket members

34 and 54 and the shape of the notch portion 54Ka may be arcuate when viewed from a plane including the center axis of the hole 18a of the bobbin 18, and are not necessarily limited thereto.

In fig. 6C, as described above, the cutout portion 54Ka (hatched portion in fig. 6C) having a substantially arcuate shape when viewed from a plane including the center axis of the hole 18a of the bobbin 18 is formed only at one end portion in the width direction of the movable plate portion 54M of the positioning protrusion 54N. In this regard, although it is described that the one end portion in the width direction of the movable piece portion 54M may be either one of the upper and lower portions in the axial direction of the housing 12, particularly in the case where the substantially arcuate cutout portion 54Ka is provided only in the upper portion in the axial direction of the housing 12 as shown in fig. 6(C), the following effects are obtained in addition to the above-described effects. When inserting the electromagnetic actuator into the valve body, the electromagnetic actuator can be inserted into the recess 24ai while sliding on the rounded R portion of the protrusion 54N of the bracket member 54, which has no cutout, and therefore the valve body can be easily inserted. Further, when the electromagnetic actuator is removed from the valve body, the angle of the notched portion end portion having the notched portion 54Ka of the protrusion portion 54N of the bracket member 54 exerts a biting effect with respect to the direction of removal along the central axis direction of the housing 12, and as a result, there is an effect that the electromagnetic actuator is difficult to remove in the central axis direction. In the bracket member 44 shown in fig. 6(B), the same effect is obtained by only the corner of the upper fan-shaped cutout end.

In the first embodiment, in the case where the fan-shaped cutout portions 14Ka, 14Kb are provided in the upper and lower axial directions as shown in fig. 5, the cutout end portions of the protrusions are more easily recessed in the corresponding recesses 24ai by the angle of the cutout end portions and are less likely to slide in the recesses 24ai in the stator coil unit support portion 24 because the cutout end portions of the protrusions are angled with respect to the circumferential direction in the engaged state with the recesses 24ai in the stator coil unit support portion 24, compared to the case where the arcuate cutout portions 34Ka, 34Kb, 54Ka are provided in the upper and lower axial directions as shown in fig. 6(a) and (C). Therefore, for example, it is possible to further avoid the deviation in the circumferential direction due to vibration or the like generated by the outdoor unit.

Further, the example in which the fan-shaped notch portion is provided on one side in the axial direction shown in fig. 6(B), the example in which the crescent-shaped notch portion is provided, and the example in which the leaf-shaped notch portion is formed so that the arcuate linear portions are back-to-back also have the same effects as those described above, as compared with the example in which the arcuate notch portion is provided (see fig. 6(a) and 6 (C)).

Fig. 8(a) and (B) show a structure and a piping tube of a second embodiment of the control valve according to the present invention.

The control valve is an electrically operated valve and, as in the above example, is disposed between the outlet of the outdoor heat exchanger 6 and the inlet of the indoor heat exchanger 2 during the cooling operation in the pipe of the refrigeration cycle shown in fig. 7, for example.

In the motor-operated valve shown in fig. 1, the bracket member 14 in the stator coil unit 10 is disposed in the enlarged portion 18be of the bobbin 18, and the stator coil unit supporting portion 24 is formed in the valve main body portion 26 at a position above the position of the connecting pipe 28, whereas in the motor-operated valve shown in fig. 8(a) and (B), the band-shaped bracket member 42 is fixed to the housing 40C so as to protrude downward from the open end of the housing 40C of the stator coil unit 40, and the stator coil unit supporting portion having the plurality of recesses 36ai is formed in the portion of the valve main body portion 36 facing the portion to be joined to the connecting pipe 28 and in the periphery thereof.

As shown in fig. 8(a) and (B), the electrically operated valve includes: a valve driving portion that drives the valve element unit in cooperation with the stator coil unit 40; a valve body 36 connected to an end of the rotor case and having a valve seat (not shown) therein that is opened and closed by a tip end of a valve element (not shown); and a valve element unit that is disposed in the valve body 36 and includes a valve element that opens and closes a valve seat.

The center portion 50 of the motor-operated valve includes a valve driving portion, a valve body portion 36, and a stator coil unit supporting portion formed on an outer peripheral portion of the valve body portion 36.

The structure of the valve driving unit is the same as the internal structure of the example shown in fig. 2 except for the stator coil unit 40, and therefore, the description of the structure is omitted. The valve body 36 is made of a metal material, such as brass, stainless steel, aluminum alloy, or a resin material, and has a valve element accommodating portion inside that accommodates a lower end of a female screw member that becomes a lower portion of the female screw portion, the other end of the valve element, and a cylindrical valve element housing. In the valve element accommodating portion, the other end of the valve element protrudes toward the valve port. Further, the valve body housing portion is formed with: a first port connected to one end of a connecting pipe 28 as a first passage on an axis substantially orthogonal to the center axis of the valve body; a second port connected to one end of a connecting pipe 30 as a second passage on an axis common to the center axis of the valve body; and a valve seat in communication with the second port.

A portion formed on the outer peripheral portion of the valve body 36, which portion faces a portion to which one end of the connecting pipe 28 is joined, and a stator coil unit support portion around the portion have a plurality of substantially circular recesses 36ai (i is 1 to 3) at predetermined intervals in the circumferential direction. Each of the recesses 36ai, with which a positioning projection 42N of the bracket member 42 described later selectively engages, has a substantially semicircular cross section having a predetermined depth. By forming the plurality of dimples 36ai in this manner, the relative position of the stator coil unit 40 with respect to the stator coil unit support portion can be selectively changed.

As shown in fig. 8(a) and (B), the stator coil unit 40 includes: a bobbin 48 that holds a coil (not shown) to which power is supplied via the lead 46; a bracket member 42 that is supported by the

leg portions

48A and 48B of the bobbin 48 and positions the housing 40C at a predetermined position with respect to the stator coil unit supporting portion; and a case 40C for accommodating the bobbin 48 with the sealing material 4 interposed therebetween. The housing 40C and the bobbin 48 each have a hole in the center portion concentrically for inserting the outer peripheral portion of the rotor housing forming the outer contour of the center portion 50. The case 40C has an inner housing portion for housing the bobbin 48 and the coil therein. The hole formed at the upper end of the housing 40C communicates with the internal receiving portion. Further, a space between the bobbin 48 inside the internal housing portion and the inner peripheral portion of the case 40C is sealed by the sealing material 41.

The band-shaped bracket member 42 is made of, for example, a thin plate metal material, and includes: a fixed end 42F fixed to the inner peripheral portion of the housing 40C; a movable piece 42M having a positioning protrusion 42N engaged with the recess 36ai of the stator coil unit support part and capable of elastic displacement; and a connecting piece 42C connecting the other end of the movable piece 42M and the fixed end 42F.

The shape of the positioning projection 42N of the movable piece 42M is a substantially pointed shape having a rounded top, and may be the same as any of the shape of the positioning projection 14N shown in fig. 5, the shape of the positioning projection 34N shown in fig. 6(a), the shape of the positioning projection 44N shown in fig. 6(B), and the shape of the positioning projection 54N shown in fig. 6(C), for example.

Therefore, the positioning projection 42N of the bracket member 42 is reliably positioned with respect to the recess 36ai of the stator coil unit supporting portion by utilizing the end portions of the plurality of portions, in a state of being restrained without a gap in the circumferential direction and the axial direction of the coil frame 48 based on the uniform component force of the pressing force of the positioning projection 42N caused by the restoring force of the movable piece portion 42M, and therefore, the position of the positioning projection 42N can be prevented from being displaced in the circumferential direction and the axial direction of the coil frame 48 due to, for example, vibration generated in the outdoor unit.

Fig. 9(a) and (B) show a structure and a piping tube of a third embodiment of the control valve according to the present invention.

In the motor-operated valve shown in fig. 1, the bracket member 14 in the stator coil unit 10 is disposed in the enlarged portion 18be of the bobbin 18, and the stator coil unit support portion 24 is formed above the position of the connecting pipe 28 in the valve body 26, whereas in the motor-operated valve shown in fig. 9(a) and (B), the bracket member 64 is provided at the upper end of the stator coil unit 60, and the stator coil unit support portion is formed at the upper portion of the outer peripheral portion of the rotor housing, which forms the outer peripheral portion of the center portion 52 of the motor-operated valve penetrating the stator coil unit 60.

As shown in fig. 9(a) and (B), the electrically operated valve includes: a valve driving portion that drives the valve element unit in cooperation with the stator coil unit 60; a valve body 56 connected to an end of the rotor case and having a valve seat (not shown) therein that is opened and closed by a tip end of a valve body (not shown); and a valve element unit that is disposed in the valve body 56 and includes a valve element that opens and closes a valve seat. The center portion 52 of the electric valve includes a valve driving portion, a valve main body portion 56, and a stator coil unit supporting portion formed at an upper portion of an outer peripheral portion of a rotor case forming an outer peripheral portion of the center portion 52.

The structure of the valve driving unit is the same as the internal structure of the example shown in fig. 2 except for the stator coil unit 60, and therefore, the description of the structure is omitted.

The valve body portion 56 is made of a metal material, such as brass, stainless steel, aluminum alloy, or a resin material, and has a valve element housing portion inside that houses a lower end of the female screw member, the other end of the valve element, and a cylindrical valve element case. In the valve element accommodating portion, the other end of the valve element protrudes toward the valve port. Further, the valve body housing portion is formed with: a first port connected to one end of a connecting pipe 28 as a first passage on an axis substantially orthogonal to the center axis of the valve body; a second port connected to one end of a connecting pipe 30 as a second passage on an axis common to the center axis of the valve body; and a valve seat in communication with the second port.

The stator coil unit support portion formed on the upper portion of the rotor case forming the outer contour portion of the center portion 52 has a plurality of substantially circular recesses 52ai (i is 1 to 5) spaced apart from each other at predetermined intervals in the circumferential direction. Each of the recesses 52ai, with which a positioning projection 64N of the bracket member 64 described later selectively engages, has a substantially semicircular cross section having a predetermined depth. By forming the plurality of dimples 52ai in this manner, the relative position of the stator coil unit 60 with respect to the stator coil unit support portion can be selectively changed.

The stator coil unit 60 includes: a bobbin (not shown) for holding a coil (not shown); a bracket member 64 for positioning the housing at a predetermined position with respect to the stator coil unit supporting portion; and a case for accommodating the bobbin with a sealing material interposed therebetween. The housing and the bobbin each have, concentrically at the center portion, a hole into which the outer peripheral portion of the rotor housing forming the outer contour of the center portion 52 is inserted. The case has an inner housing portion on the inside for housing the bobbin and the coil. The hole formed at the upper end of the housing communicates with the internal receiving portion. Further, a space between the bobbin inside the inner housing portion and the inner peripheral portion of the case is sealed by a sealing material.

The band-shaped bracket member 64 is made of, for example, a thin plate metal material in a substantially inverted U shape, and includes: a pair of fixed end portions 64F fixed to an upper end surface of the outer peripheral portion of the rotor case; and an elastically displaceable movable plate portion 64M connecting the pair of fixed end portions 64F. The movable piece 64M has a pair of positioning protrusions 64N facing each other and engaged with the respective recesses 52ai of the stator coil unit supporting portion.

The shape of the positioning projection 64N of the movable plate 64M is a substantially pointed shape having a rounded top, and may be the same as any of the shape of the positioning projection 14N shown in fig. 5, the shape of the positioning projection 34N shown in fig. 6(a), the shape of the positioning projection 44N shown in fig. 6(B), and the shape of the positioning projection 54N shown in fig. 6(C), for example.

Therefore, the positioning projection 64N of the bracket member 64 is reliably positioned with respect to the recess 52ai of the stator coil unit supporting portion by utilizing the end portions of the plurality of portions, in a state of being restrained without a gap in the circumferential direction and the axial direction of the rotor case based on the uniform component force of the pressing force of the positioning projection 64N caused by the restoring force of the movable piece portion 64M, and therefore, the position of the positioning projection 64N can be prevented from being displaced in the circumferential direction and the axial direction of the coil frame 48 due to, for example, vibration generated in the outdoor unit.

By applying the control valves of the first to third embodiments described above to the refrigeration cycle system shown in fig. 7, the following effects are exhibited in the refrigeration cycle system.

In the control valves of the first to third embodiments, the position of the positioning protrusion relative to the recess of the stator coil unit supporting portion can be prevented from being shifted in the circumferential direction and the axial direction of the rotor case due to vibration or the like generated in the outdoor unit. Therefore, variation in the valve opening start pulse does not occur, and variation in the valve opening degree of the valve body with respect to the valve port does not occur even at a predetermined number of drive pulses. As a result, since a desired flow rate characteristic corresponding to a small opening range of the valve element can be obtained, efficient temperature control can be performed even as a refrigeration cycle.

In the example shown in fig. 7, the configuration of the example of the refrigeration cycle to which the first to third embodiments of the control valve according to the present invention are applied is schematically described, but the first to third embodiments of the control valve according to the present invention are not limited to the air conditioner corresponding to the refrigeration cycle, and may be applied to, for example, a refrigerator without a switching valve.

In the above-described embodiment, the description has been given of the example in which the present invention is applied to the electrically operated valve as a typical example of the control valve, and the present invention is not limited to the electrically operated valve, and may be applied to a control valve such as an electromagnetic valve in which an electromagnetic actuator is incorporated in a valve main body.

As described above, the first to third embodiments of the control valve according to the present invention are described in detail with reference to the drawings, and other modifications are also described in detail, but the specific configuration is not limited to these embodiments, and the present invention is also included in the scope of the present invention even if there are changes, improvements, and the like that do not depart from the spirit of the present invention.

Claims

1. A control valve is characterized by comprising:

a valve body section including a housing section having a first port connected to a first passage and a second port connected to a second passage and movably housing a valve element unit that communicates with the first port and the second port and includes a valve element that controls opening and closing of a valve port of a valve seat provided in the second port;

an electromagnetic actuator including a stator coil unit that operates a drive mechanism that causes the valve element unit to perform an operation of opening and closing a valve port of the valve seat to adjust a flow rate of a fluid passing between a tip portion of the valve element and a periphery of the valve port of the valve seat; and

an elastically deformable bracket member disposed on the electromagnetic actuator for positioning and holding the stator coil unit on the stator coil unit support portion,

the bracket member has at least one positioning protrusion that engages with a peripheral edge of at least one recess in the stator coil unit support portion, and the peripheral edge and the outer peripheral portion of at least one cutout of the positioning protrusion engage with the peripheral edge of the recess at least three locations along the circumferential direction and the axial direction of the stator coil unit support portion.

2. The control valve of claim 1,

the positioning protrusion of the bracket member is provided on a peripheral edge of an inner peripheral portion of the stator coil unit, and the stator coil unit support portion is formed on an outer peripheral portion of the rotor case.

3. The control valve of claim 1,

the positioning protrusion of the bracket member is provided at a position apart from an end of the stator coil unit, and the stator coil unit support portion is formed on an outer peripheral portion of the valve body.

4. The control valve of claim 1,

the cutout portions of the positioning protrusion are formed at two positions so as to be separated from each other in the axial direction of the stator coil unit supporting portion.

5. The control valve of claim 1,

the shape of the cutout of the positioning protrusion is substantially fan-shaped when the cutout is viewed from a plane including the central axis of a bobbin that forms a part of the stator coil unit facing the positioning protrusion.

6. The control valve of claim 1,

the cutout of the positioning protrusion has a substantially arcuate shape when viewed from a plane including a central axis of a bobbin constituting a part of the stator coil unit facing the positioning protrusion.

7. The control valve according to claim 5 or 6,

the notch of the positioning protrusion is formed only on one side of the outer periphery of the positioning protrusion along the central axis of the bobbin.

8. A refrigeration cycle system is characterized in that,

comprises an evaporator, a compressor, and a condenser,

the control valve according to any one of claims 1 to 7 is provided in a pipe disposed between an outlet of the condenser and an inlet of the evaporator.