Stator coil unit and flow regulating valve with the same

Abstract

To provide a stator coil unit and a flow regulating valve with the same which can suppress occurrence of troubles, such as corrosion and insulation deterioration, caused by highly humid air in a control board arranged in a case body, and can improve reliability.SOLUTION: A stator coil unit comprises: a case body 91 having one end opening part 91a, and the other end opening part 91b; a seal member Oc arranged on an inner peripheral surface of the one end opening part 91a; a stator coil 93 arranged in the case body 91; a lid 95 which seals the other end opening part 91b; a control board 94 electrically connected with the stator coil 93; and highly humid air suppression means having a sheet shape and having a humidity control member 96 for controlling humidity within a predetermined range, wherein the highly humid air suppression means is arranged on an inner surface of the lid 95 so that the humidity regulating member 96 mostly covers the control board 94 when viewed from a direction of an axis L.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a stator coil unit having a high-humidity air suppression means and a flow control valve including the same.

Background Art

[0002] In recent years, a flow control valve equipped with a control board has been adopted. Since this control board mounts electronic components such as semiconductor elements and IC chips, it is required to be used within a range of relative humidity (hereinafter referred to as "usable humidity range") (for example, 20% to 80% relative humidity) that satisfies the specifications.

[0003] Here, as shown in FIG. 11, Patent Document 1 describes a flow control valve 1100 (hereinafter referred to as "conventional flow control valve") equipped with a control board 1194, which includes a flow control valve body 1110 having a cam 1181 and a stator coil unit 1190 attached to the flow control valve body 1110. Further, in Patent Document 1, the stator coil unit 1190 includes a case body 1191, a stator coil 1193 housed in the case body 1191 and driving the flow control valve body 1110, a control board 1194 for controlling a drive signal to the stator coil 1193, and a lid body 1195, and the flow control valve 1100 is attached to a housing H1100 provided with a first flow path Fp1 and a second flow path Fp2. Furthermore, in the case body 1191 in Patent Document 1, one end side opening 1191a is sealed by insertion of the flow control valve body 1110 via a case body seal member Oc1100, and the other end side opening 1191b is closed by the lid body 1195, so that the inside of the case body 1191 is an airtight accommodation space 1191f.

[0004] In this conventional flow control valve, due to the expansion of the usage, for example, the working fluid may be used in a refrigeration cycle system (hereinafter referred to as "Case 1") that reaches a low temperature (for example, -40°C) or in an environment where the influence of the outside air is relatively large (hereinafter referred to as "Case 2").

[0005] First, in Case 1, in a conventional flow control valve, for example, when the flow direction of the fluid is changed from Fp1 to Fp2, and a low-temperature working fluid that has passed through the valve port 1101a and been depressurized and whose fluid temperature has decreased is introduced into the can 1181, the can 1181 that is in direct contact with the working fluid is cooled. As a result, mainly the lower air having the can 1181 in the accommodation space 1191f in the case body 1191 is cooled and condensed, resulting in locally high relative humidity (for example, over 80%) (hereinafter referred to as "high-humidity air").

[0006] Also, in Case 2, in a conventional flow control valve, when the outside air temperature in winter drops (for example, to -10°C etc.) and the case body 1191 that is in direct contact with the outside air is cooled, mainly the upper air in the accommodation space 1191f in the case body 1191 is cooled and condensed, resulting in locally high-humidity air.

[0007] Here, the molecular weight of moisture, 18 (the molecular weight of water vapor H 2 O), is smaller than the average molecular weight of standard air, 28.8 (the molecular weight of nitrogen N2 is 28 and the molecular weight of oxygen O 2 is 32, with a ratio of approximately 4:1). Since the total number of molecules does not change according to Avogadro's law even if water vapor is contained in the air, the air becomes lighter as the amount of water vapor in the air increases. Thus, since the high-humidity air in Case 1 is located below in the accommodation space 1191f in the case body 1191, due to the buoyancy effect, after rising from the side with a larger amount of water vapor to the side with a smaller amount of water vapor, it stays. And since the high-humidity air in Case 2 is located above in the accommodation space 1191f in the case body 1191, it stays in place.

[0008] Therefore, in both Case 1 and Case 2, the control board 1194 arranged above in the case body 1191 is surrounded by the staying high-humidity air, and there was a risk of problems such as corrosion and insulation degradation due to being used outside the operating humidity range and the dripping of condensed water on the inner surface of the lid 1195 (hereinafter referred to as "conventional problem (troubles to the control board due to high-humidity air)").

[0009] In addition, in order to solve the conventional problems (troubles with the control board due to high-humidity air), it may be considered to apply a resin coating to the entire control board. However, since new problems such as a decrease in versatility and high cost will occur, it cannot be adopted.

Prior Art Documents

Patent Documents

[0010]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0011] An object of the present invention is to provide a stator coil unit capable of suppressing troubles such as corrosion and insulation deterioration of a control board disposed in a case body due to high-humidity air and improving reliability, and a flow rate adjustment valve including the same.

Means for Solving the Problems

[0012] In order to solve the above problems, there is provided a case body having one end opening and the other end opening into which the flow rate adjustment valve main body can be fitted, and the inner diameter of which expands along the axial direction from the one end opening to the other end opening, a seal member disposed on the inner peripheral surface of the one end opening and capable of sealing the gap between the one end opening and the flow rate adjustment valve main body, a stator coil having a cylindrical shape and disposed on the inner peripheral side of the case body between the one end opening and the other end opening, a lid body for sealing the other end opening, and a control substrate that divides the accommodation space defined between the lid body and the stator coil in the case body into a one-end-side accommodation space and a the other-end-side accommodation space, is electrically connected to the stator coil, and controls a drive signal to the stator coil, and a high humidity air suppression means having a humidity control member in the form of a sheet and capable of controlling the humidity within a predetermined range. The one-end-side accommodation space and the other-end-side accommodation space are always in communication with each other, and the high humidity air suppression means is a stator coil unit disposed on the inner surface of the lid body such that the humidity control member substantially covers the control substrate when viewed in the axial direction.

[0013] Further, in the above stator coil unit, the high humidity air suppression means may be disposed on the inner peripheral surface of at least one of the case bodies such that the humidity control member substantially covers the control substrate when viewed in a direction orthogonal to the axis.

[0014] Further, in the above stator coil unit, the high humidity air suppression means may be configured to make the axial length of the one-end-side accommodation space larger than the axial length of the other-end-side accommodation space, and to be disposed such that the humidity control member substantially covers the inner peripheral surface of at least one of the case bodies in the one-end-side accommodation space when viewed in a direction orthogonal to the axis.

[0015] Further, the stator coil unit further includes a voltage equalizing means, and the voltage equalizing means is provided with a ventilation and waterproof member at a position where it does not interfere with the humidity adjusting member in at least one of the lid body and the case body, and the high humidity air suppressing means may be such that the humidity adjusting member is arranged along the direction L in which the inner opening of the ventilation and waterproof member faces.

[0016] Further, the stator coil unit includes a connector for a power supply terminal to the control board, and the connector may be integrally formed with the lid body or the case body.

[0017] Further, the stator coil unit includes a connector for a power supply terminal to the control board, and the connector may be fixed to the lid body or the case body via a joint portion.

[0018] Further, in the stator coil unit, the stator coil is provided with a bracket protruding from one end side, and the case body is provided with a notch extending in the axial direction on the inner peripheral surface of the other end side of the one end opening, and by engaging the bracket of the stator coil with the notch of the case body, the stator coil may be positioned in the circumferential direction with respect to the case body.

[0019] Further, a flow rate adjustment valve includes the above-described stator coil unit and a flow rate adjustment valve body portion attached to the stator coil unit. The bracket of the stator coil has a convex portion protruding in the inner diameter direction, and the flow rate adjustment valve body portion includes a can extending in the axial direction and having a bottomed cylindrical shape. The outer peripheral surface of the can has at least one recess having a shape corresponding to the convex portion and recessed in the inner diameter direction on the same circumference. By engaging the convex portion of the stator coil with the recess of the can, the stator coil unit may be positioned in the axial direction and the circumferential direction with respect to the flow rate adjustment valve body portion.

Advantages of the Invention

[0020] According to the present invention, it is possible to provide a stator coil unit in which a control board disposed inside a case body is suppressed from causing troubles such as corrosion and insulation deterioration due to high-humidity air, and the reliability can be improved, and a flow rate adjustment valve including the same.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Mode for Carrying Out the Invention

[0022] Embodiments of the present invention will be described in detail with reference to FIGS. 1 to 10. However, the present invention is not limited to the aspects of this embodiment. Hereinafter, an electric valve (electric flow rate adjustment valve) will be used as the flow rate adjustment valve for description. However, the high humidity air suppression means in the flow rate adjustment valve of the present invention can be applied to a solenoid valve (electromagnetic flow rate adjustment valve) instead of the electric valve.

[0023] <Regarding Terms> In the descriptions of this specification and the claims, "left", "right", "up", and "down" indicate the directions shown in FIGS. 1, 2(a), (c), 3(a), (b), 5 to 7, 8(b), and 9. In the descriptions of this specification and the claims, "one end" and "the other end" indicate "the lower end" and "the upper end" in the drawings. In the descriptions of this specification and the claims, "usable humidity range" indicates the range of relative humidity (for example, relative humidity from 20% to 80%) within which electronic components such as semiconductor elements and IC chips mounted on a control board can be used while satisfying the specifications. In the descriptions of this specification and the claims, "high-humidity air" indicates air with a relatively high relative humidity of, for example, more than 80%. In the descriptions of this specification and the claims, "low-humidity air" indicates air with a relatively low relative humidity of, for example, less than 20%. In the descriptions of this specification and the claims, "humidity-adjusting member" refers to a material that exhibits moisture absorption and desorption properties, suppressing rapid increases and decreases in humidity by absorbing moisture when the humidity rises and releasing moisture when the humidity drops, thereby maintaining the humidity within a predetermined range (for example, relative humidity from 20% to 80%). Examples of such materials include polymers, carbonaceous materials such as charcoal and bamboo charcoal, and inorganic substances such as talc, zeolite, diatomaceous earth, montmorillonite, sepiolite, alumina, silica, and allophane. In the descriptions of this specification and the claims, "substantially cover" indicates that, when viewed from a predetermined direction, the overlapping area of the two members is 50% or more, and more preferably 85% or more. In the descriptions of this specification and the claims, "ventilation and waterproof member" refers to a porous member composed of a plurality of pores having a size larger than air molecules and extremely smaller than water droplets (for example, several μm), or a non-porous humidity-adjusting member that hardly allows water vapor to pass under low-humidity conditions but easily allows water vapor to pass under high-humidity conditions, and has a dustproof and waterproof function from the outside while maintaining ventilation.

[0024] (First Embodiment) <Configuration of the Flow Rate Adjusting Valve> Using FIGS. 1 to 5, the flow rate adjustment valve 100a according to the first embodiment of the present invention will be described. As shown in FIG. 5, the flow rate adjustment valve 100a is mainly composed of a flow rate adjustment valve main body 10 and a stator coil unit 90. Hereinafter, each configuration of the flow rate adjustment valve 100a will be described in order.

[0025] <Regarding the flow rate adjustment valve main body> First, as shown in FIG. 1, the flow rate adjustment valve main body 10 is mainly composed of a support member 20, a connection member 30, a valve main body 40, a drive shaft 50, a valve body portion 60, a coil member 70, and a rotor unit 80. Hereinafter, each configuration of the flow rate adjustment valve main body 10 will be described in order.

[0026] Here, although details will be described later, in the first embodiment, as shown in FIG. 4, as the high humidity air suppression means (1), a humidity adjusting member 96 that adjusts the humidity within a predetermined range is disposed on the inner surface of the lid body 95 (see FIG. 1) so as to substantially cover the control board 94 when viewed in the direction of the axis L. By adopting this, the conventional problem (trouble to the control board due to high humidity air) can be solved and the reliability can be improved.

[0027] The support member 20 has a substantially cylindrical shape and is made of a resin material such as polyphenylene sulfide (PPS), for example. At one end of the support member 20, a fixing fitting 21 is integrally insert-molded. This fixing fitting 21 is made of a metal material such as stainless steel, for example, has an annular shape with an inner peripheral edge curved toward one end side in the direction of the axis L, and is provided with at least one (four in the example) through hole 21a in the embedding region in the support member 20. Here, when the fixing fitting 21 is insert-molded with respect to the support member 20, the resin material is solidified in a state of being filled in at least one through hole 21a, thereby improving the bonding strength between them.

[0028] Further, the support member 20 is arranged such that its axis overlaps with the axis L. At the center of the support member 20, a screw hole 23, a bearing hole 24, and a slide hole 25, which are arranged in the direction of the axis L so as to penetrate the support member 20, are formed concentrically. An internal thread portion 23a is formed on the inner peripheral surface of the screw hole 23, and the external thread portion 51a of the drive shaft 50 described later is screwed therein. The guide portion 52 of the drive shaft 50 described later is slidably engaged with the inner peripheral surface of the bearing hole 24. The slide hole 25 is arranged on one end side and is formed to have a larger diameter than the bearing hole 24. The valve body portion 60 described later is slidably engaged with the slide hole 25.

[0029] On the outer peripheral surface of the other end side of the support member 20, a guide rail 26 formed of a spiral ridge is integrally formed. The guide rail 26 has adjacent winding portions arranged at intervals. The guide rail 26 is arranged such that its axis overlaps with the axis L, and the coil portion 71 of the coil member 70 described later is screwed therein, and each winding portion of the coil portion 71 is guided from one side or both sides so that the coil member 70 can rotate in the circumferential direction.

[0030] Furthermore, at one end portion of the support member 20, a cylindrical portion 27 is integrally formed such that the outer peripheral surface thereof is reduced in diameter toward one end side in the direction of the axis L and can be inserted into the insertion hole 41 of the valve body 40 described later. A part of the outer peripheral surface of the cylindrical portion 27 has a shape corresponding to the insertion hole 41 of the valve body 40.

[0031] The connection member 30 has a substantially cylindrical shape in which the inner peripheral surface is reduced in diameter toward one end side in the direction of the axis L, and is made of a metal material such as stainless steel, for example. On the outer peripheral surface of one end side, a male screw engaging portion 30scm (see FIG. 1(b)) constituting the first screw engaging portion Sc1 is formed and is screwed and fixed to the female screw engaging portion 40scf of the valve body 40 described later. Further, the other end portion on the inner peripheral side of the connection member 30 is fixed to the support member 20 via a fixing fitting 21 joined by arc welding or the like.

[0032] The valve body 40 is made of a metal material such as aluminum, for example. An insertion hole 41 that defines the valve chamber 2 and the valve port 1a are formed concentrically and arranged in the axial direction of the axis L so as to penetrate the valve body 40. A valve seat 42 is formed on the inner peripheral edge at the boundary between the insertion hole 41 and the valve port 1a. An opening 43 that defines the side port 1b and communicates with the valve chamber 2 is formed on the side wall of the valve body 40. Further, on the outer peripheral surface 44 of the valve body 40, as viewed in the axial direction of the axis L, there are a shape having two parallel surfaces, a hexagonal shape, etc., and a jig engagement portion 45 that protrudes radially outward, a first annular groove 46 in which the first shaft seal member O1 is accommodated, a male screw engagement portion 40scm that constitutes the second screw engagement portion Sc2, and a second annular groove 47 in which the second shaft seal member O2 is accommodated are formed. Here, on the inner peripheral side of the jig engagement portion 45, a female screw engagement portion 40scf (see FIG. 1(b)) that constitutes the first screw engagement portion Sc1 is formed and is screwed and fixed to the male screw engagement portion 30scm of the connecting member 30. Thereby, the valve body 40 is fixed to the support member 20 via the connecting member 30.

[0033] Although details will be described later, as shown in FIG. 6, when the flow rate adjustment valve 100a is attached to the housing H, the outer peripheral surface 44 of the valve body 40 is incorporated with a slight gap via the first shaft seal member O1 and the second shaft seal member O2 between the valve body 40 and the housing H. Therefore, when the valve body 40 and the housing H are made of different metals from each other and are placed in an environment where water or the like intrudes into the gap portion on the other end side of the first shaft seal member O1 and electricity easily flows, there is a risk of galvanic corrosion occurring. On the other hand, in the present embodiment, by making the material of the valve body 40 coincide with the material of the housing H (for example, a metal material such as aluminum), it is possible to suppress the occurrence of galvanic corrosion at the interface between the valve body 40 and the housing H.

[0034] In addition, as shown in FIG. 1(b), the connecting member 30 and the valve body 40 are always in contact with each other via the first screwing portion Sc1. Here, in order to ensure welding with the fixing fitting 21, the material of the connecting member 30 is made to match the material of the fixing fitting 21 (for example, a metal material such as stainless steel). Therefore, since the connecting member 30 and the valve body 40 are made of different metals, when they are placed in contact in an environment where electricity such as water easily flows, there is a risk of galvanic corrosion. In contrast, in the present embodiment, an anti-rotation adhesive Ad is applied to and sealed the first screwing portion Sc1 where the connecting member 30 and the valve body 40 are always in contact, thereby preventing the intrusion of water or the like into the first screwing portion Sc1. As a result, the occurrence of galvanic corrosion at the interface between the connecting member 30 and the valve body 40 can be suppressed.

[0035] The drive shaft 50 is formed in a cylindrical rod shape using a metal such as stainless steel as a material. On the drive shaft 50, a screw portion 51, a guide portion 52, and a flange portion 53 disposed at one end of the guide portion 52 are formed, which are arranged in the direction of the axis L. A male screw portion 51a is formed on the screw portion 51, and by screwing the male screw portion 51a into the female screw portion 23a of the support member 20, the rotational movement of the drive shaft 50 is converted into a linear movement. The guide portion 52 guides the movement of the drive shaft 50 in the direction of the axis L by slidably engaging with the inner peripheral surface of the bearing hole 24. The drive shaft 50 is moved in the direction of the axis L by a screw feed action due to rotation. The flange portion 53 rotatably engages the valve body portion 60 described later. In the first embodiment, the female screw portion 23a and the male screw portion 51a are right-handed screws.

[0036] The valve body portion 60 includes a valve holder 61, a valve body 62, a washer 63, a spring receiver 64, and a compression coil spring 65.

[0037] The valve holder 61 is formed in a cylindrical shape having an outer diameter substantially the same as the inner diameter of the slide hole 25 of the support member 20. The valve holder 61 is slidably engaged in the direction of the axis L along the slide hole 25.

[0038] The valve body 62 has a truncated cone shape at one end, and the tip of this truncated cone shape is fixed to one end portion 61a of the valve holder 61 so as to face the valve port 1a. The valve body 62 adjusts the flow rate by increasing or decreasing the opening degree between the valve seat 42 of the valve port 1a from the maximum opening degree of the valve to the minimum opening degree (or fully closed state) of the valve.

[0039] At the other end portion 61b of the valve holder 61 on the side opposite to the valve port 1a side, the flange portion 53 of the drive shaft 50 is rotatably hooked. Specifically, the flange portion 53 of the drive shaft 50 sandwiches a washer 63 between it and the other end portion 61b of the valve holder 61, and the drive shaft 50 is rotatably hooked to the other end portion 61b of the valve holder 61 by this flange portion 53. Due to this engagement, the valve holder 61 is supported by the drive shaft 50 so as to be movable in the direction of the axis L and rotatable about the axis L. Note that an opening larger than the movable range in the radial direction of the drive shaft 50 is formed at the other end portion 61b of the valve holder 61. Also, a spring receiver 64 is provided in the valve holder 61 so as to be movable in the direction of the axis L. A compression coil spring 65 is attached between this spring receiver 64 and the valve body 62 in a compressed state with a predetermined load applied. Thereby, the spring receiver 64 is biased toward the other end side and is in contact with one end portion of the drive shaft 50.

[0040] The coil member 70 integrally includes a coil portion 71 in the shape of a coil spring and a claw portion 72 protruding radially outward from one end of the coil portion 71. The coil portion 71 is rotatably screwed in the circumferential direction to the guide rail 26 of the support member 20. This coil member 70 can be easily manufactured by forming a metal wire such as stainless steel.

[0041] The rotor unit 80 includes a cam 81 and a magnet rotor 82.

[0042] The can 81 is made of a metal material such as stainless steel and has a substantially bottomed cylindrical shape with its upper end closed. One end-side open end of the can 81 is hermetically joined to the outer peripheral side other end of the connecting member 30 by arc welding or the like, thereby defining the sealed space 3. Further, as shown in FIG. 5, at least one recess 81a that is recessed in the inner diameter direction is formed on the same circumference on the outer peripheral surface of one end side of the can 81, and this recess 81a can be engaged with a convex portion 93a1 of a stator coil 93 described later.

[0043] The magnetic rotor 82 integrally includes a cylindrical magnet portion 84 magnetized with multiple poles on its outer peripheral portion, a disk portion 85 that closes the other end thereof, and a protrusion 87. The magnetic rotor 82 is fixed to the drive shaft 50 via a fitting 86 insert-molded at the center of the disk portion 85. Thereby, the magnetic rotor 82 is provided rotatably within the can 81 about the axis L of the drive shaft 50. Here, the protrusion 87 of the magnetic rotor 82 can contact the claw portion 72 of the coil member 70. Therefore, by the rotation of the magnetic rotor 82, the coil member 70 is pushed and rotated in the circumferential direction via the claw portion 72. As a result, the coil member 70 abuts against an upper limit stopper (not shown) or a lower limit stopper (not shown), the rotation of the coil member 70 is restricted, and the rotation of the magnetic rotor 82 is also restricted. Therefore, the valve body portion 60 is restricted from moving beyond the position where it reaches the maximum opening degree or the minimum opening degree (or the valve closed state).

[0044] When the magnetic rotor 82 is rotated, the drive shaft 50 is rotated together with this magnetic rotor 82, and due to the screw feed action by the male screw portion 51a and the female screw portion 23a, the drive shaft 50 moves in the direction of the axis L and the valve body portion 60 moves forward and backward with respect to the valve port 1a. Thereby, the opening degree with the valve seat 42 of the valve port 1a is changed, and the flow rate of the fluid flowing from the valve port 1a to the side port 1b (or from the side port 1b to the valve port 1a) is controlled.

[0045] <Regarding the stator coil unit> Next, as shown in FIGS. 1(a) and 2(a), the stator coil unit 90 is mainly composed of a case body 91, a connector 92, a stator coil 93, a control board 94, a lid body 95, and a humidity control member 96. Hereinafter, each component of the stator coil unit 90 will be described in order.

[0046] The case body 91 is made of a resin material such as polyphenylene sulfide (PPS) or polybutylene terephthalate (PBT). As shown in FIG. 2(a), it has one end opening 91a into which the flow rate adjustment valve body portion 10 can be fitted, and the other end opening 91b sealed by the lid body 95. From the one end opening 91a to the other end opening 91b, the inner diameter expands along the axis L direction. On the inner peripheral surface of the one end side of the one end opening 91a, there is provided a seal member accommodation groove 91c for accommodating a case body seal member Oc (seal member). Also, on the inner peripheral surface of the other end side of the one end opening 91a, as shown in FIGS. 2(a) and (b), there is provided a notch portion 91e extending in the axis L direction. Further, on the other end side of the case body 91, as shown in FIG. 2(b), when viewed from the axis L direction, support portions 91d with reduced-diameter tips are respectively erected at four corners of the case body 91.

[0047] The connector 92 is used for the power supply terminal to the control board 94. Also, in the first embodiment, the connector joining is integrally formed by insert molding the connector 92 on the other end side of the case body 91. Thereby, in the stator coil unit 90 of the first embodiment, connectors 92 corresponding to various standards can be flexibly adopted, so there is no need to prepare an integral molding die of the case body 91 including the connector 92 for each standard, and cost reduction can be achieved.

[0048] Note that the connector 92 in the first embodiment is integrally formed with the case body 91, but it is not limited thereto. For example, it may be integrally formed with the lid body 95.

[0049] <Regarding the connector joining modification example> Here, with reference to FIG. 3, connector joining modification examples 1 and 2 of the first embodiment will be described. Connector joining modification examples 1 and 2 of the first embodiment are different from the connector joining of the case body 91 and the connector 92 in the first embodiment with respect to the connector joining of the case bodies 91', 91'' and the connectors 92', 92'', but the other basic configurations are the same as those of the first embodiment. Here, the same components are denoted by the same reference numerals, and redundant descriptions are omitted. Note that FIGS. 3(a) and 3(b) respectively correspond to the lower diagrams of FIG. 2(a).

[0050] (Connector joining modification example 1 of the first embodiment) As shown in FIG. 3(a), in connector joining modification example 1 of the first embodiment, the connector 92' further includes a flange portion 92a' to increase the joining area, and the joining portion 92b' between the flange portion 92a' and the case body 91' is securely fixed by adhesive joining or laser welding joining or the like. Thereby, in connector joining modification example 1 of the first embodiment, since the connector 92' corresponding to various standards can be flexibly adopted, similarly to the first embodiment, it is not necessary to prepare an integral molding die of the case body 91' including the connector 92' for each standard, and the integral molding die can be shared, and cost reduction can be achieved.

[0051] (Connector joining modification example 2 of the first embodiment) As shown in FIGS. 3(b) and 3(c), in connector joining modification example 2 of the first embodiment, the connector 92'' further includes a flange portion 92a'' to increase the joining area, and the joining portion 92b'' between the flange portion 92a'' and the case body 91'' is securely fixed by screwing or the like via a seal packing 92c''. Thereby, in connector joining modification example 2 of the first embodiment, since the connector 92'' corresponding to various standards can be flexibly adopted, similarly to the first embodiment, it is not necessary to prepare an integral molding die of the case body 91'' including the connector 92'' for each standard, and the integral molding die can be shared, and cost reduction can be achieved.

[0052] Note that the connectors 92’ and 92’’ in Connector Joining Modification Examples 1 and 2 of the first embodiment are fixed to the case bodies 91’ and 91’’. However, the present invention is not limited to this, and for example, they may be fixed to the lid body 95.

[0053] Returning now to the description of the stator coil unit 90 in the first embodiment with reference to FIGS. 1 and 2.

[0054] The stator coil 93 has a cylindrical shape, and when a pulse signal is applied from the outside, the magnet rotor 82 is rotated according to the number of pulses. Further, the stator coil 93 is provided with a bracket 93a protruding from one end side. A convex portion 93a1 protruding in the inner diameter direction is formed on the bracket 93a. Although details will be described later, when the bracket 93a engages with the notch portion 91e of the case body 91, the stator coil 93 is positioned in the circumferential direction with respect to the case body 91. Further, as shown in FIG. 5, when the convex portion 93a1 engages with the concave portion 81a of the cam 81, the stator coil unit 90 is positioned in the axial direction and the circumferential direction with respect to the flow rate adjustment valve main body portion 10.

[0055] The control board 94 has electronic components such as semiconductor elements and IC chips mounted thereon, and is electrically connected to the stator coil 93 via the connection terminals 94a and the cable 94b to control the drive signal to the stator coil 93. Further, as shown in FIG. 4, the control board 94 has a rectangular shape when viewed from the direction of the axis L, and support holes 94c having substantially the same inner diameter as the outer diameter of the tip of the support portion 91d in the case body 91 are formed at the four corner portions of the control board 94, respectively. The four support portions 91d in the case body 91 are respectively fitted into the four support holes 94c.

[0056] The lid body 95 is made of a resin material such as polyphenylene sulfide (PPS) or polybutylene terephthalate (PBT), and has a rectangular shape when viewed from the direction of the axis L. An annular vertical wall 95a that can engage with the inner peripheral surface of the other end opening 91b is formed on one end surface on the outer peripheral side of the lid body 95 to seal the other end opening 91b.

[0057] The humidity control member 96 has a sheet shape, and when the humidity rises, it suppresses the rise in humidity by absorbing moisture, and when the humidity drops, it suppresses the drop in humidity by releasing moisture, thereby suppressing rapid fluctuations in humidity and maintaining it within a predetermined range (for example, relative humidity from 20% to 80%). It is made of materials showing moisture absorption and desorption properties, such as polymer polymers, carbon materials such as charcoal and bamboo charcoal, and inorganic substances such as talc, zeolite, diatomaceous earth, montmorillonite, sepiolite, alumina, silica, and allophane.

[0058] <Regarding the assembly process of the stator coil unit> With reference to FIG. 2, the assembly process of the stator coil unit 90 will be described. By performing the following assembly process, the stator coil unit 90 shown in FIG. 2(c) is provided.

[0059] First, as shown in FIG. 2(a), in order to assemble the stator coil 93 to the case body 91, the stator coil 93 is moved so as to approach the case body 91 in the direction of the axis L, and the bracket 93a of the stator coil 93 is engaged with the notch 91e (see FIG. 2(b)) of the case body 91. Thereby, the stator coil 93 can be positioned in the circumferential direction with respect to the case body 91. At this time, the stator coil 93 and the case body 91 may be fixed to each other by an adhesive or the like. By adopting such a simplified connection configuration, cost reduction can be achieved.

[0060] Next, as shown in Fig. 2(a), in order to assemble the control board 94 to the case body 91, the control board 94 is moved closer to the case body 91 in the direction of the axis L. The connection terminals 94a of the control board 94 are connected to the stator coil 93, and the support holes 94c (see Fig. 4) of the control board 94 are respectively fitted into the support portions 91d of the case body 91. The terminals of the connector 92 are fitted into the terminal insertion holes of the control board 94. As a result, the control board 94 is disposed on the other end side of the connector 92 within the case body 91. Thereafter, the control board 94 and the case body 91 are fixed to each other by an adhesive, welding, or the like.

[0061] Furthermore, the humidity adjusting member 96 is fixed to the inner surface of the lid body 95 by an adhesive, double-sided tape, or the like.

[0062] Finally, as shown in Fig. 2(a), in order to assemble the lid body 95 to the case body 91, the lid body 95 is moved closer to the case body 91 in the direction of the axis L, and the annular vertical wall 95a of the lid body 95 is fitted into the other end opening 91b of the case body 91. Thereafter, the lid body 95 and the case body 91 are fixed to each other by welding, an adhesive, or the like. As a result, as shown in Fig. 2(c), an accommodation space 91f is defined between the lid body 95 and the stator coil 93 within the case body 91. This accommodation space 91f is divided by the control board 94 into a one-end-side accommodation space 91f1 and a the other-end-side accommodation space 91f2. Since the outer peripheral edge of the control board 94 is disposed with a gap from the case body 91, the one-end-side accommodation space 91f1 and the other-end-side accommodation space 91f2 are always in communication with each other.

[0063] <Regarding the mounting position of the humidity adjusting member> Here, with reference to Fig. 4, the mounting position of the humidity adjusting member 96 with respect to the control board 94 will be described. In Fig. 4, for the sake of explanation, a top view passing through the lid body 95 is shown.

[0064] As will be described in detail later, as a high-humidity air suppression means, as shown in FIG. 4, when viewed from the axial direction of the axis L, the humidity control member 96 is disposed on the inner surface of the lid body 95 (not shown) so as to substantially cover the control substrate 94. Here, specifically, when viewed from the axial direction of the axis L, the fact that the humidity control member 96 "substantially covers" the control substrate 94 means that the overlapping area of the two is 50% or more, and more preferably, the overlapping area of the two is 85% or more.

[0065] <Assembly process of the stator coil unit and the flow rate adjustment valve body portion> The assembly process of the stator coil unit 90 and the flow rate adjustment valve body portion 10 will be described with reference to FIG. 5. By performing the following assembly process, the flow rate adjustment valve 100a shown in FIG. 1 is provided.

[0066] First, as shown in FIG. 5, in order to assemble the stator coil unit 90 to the flow rate adjustment valve body portion 10, the stator coil unit 90 is moved so as to approach the flow rate adjustment valve body portion 10 in the axial direction of the axis L, and the convex portion 93a1 in the bracket 93a of the stator coil 93 is engaged with any one of a plurality of concave portions 81a provided on the outer peripheral surface of the cam 81 on the same circumference. By adopting such a simplified connection configuration, cost reduction can be achieved, and the positioning of the stator coil unit 90 in the axial direction and the circumferential direction with respect to the flow rate adjustment valve body portion 10, that is, the pulling-out direction of the connector 92 in the circumferential direction can be freely selected. Therefore, for example, the degree of freedom in the connection direction to an ECU (Electronic Control Unit) or the like can be improved. At the same time, the case body seal member Oc is sandwiched between the seal member accommodation groove 91c of the one-end opening portion 91a and the outer peripheral surface of the connection member 30, so that the accommodation space 91f is in a sealed state isolated from the external environment.

[0067] <Attachment of the flow rate adjustment valve to the housing> The attachment process of the flow rate adjustment valve 100a to the housing H will be described with reference to FIG. 6.

[0068] <Regarding the housing> The housing H is made of a metal material such as aluminum, for example, and an insertion hole having a plurality of annular stepped portions that sequentially reduce in diameter from the other end side to the one end side along the axial direction of the axis L is formed. A first accommodation groove G1, a second accommodation groove G2, and a third accommodation groove G3 are sequentially formed in the plurality of annular stepped portions. Here, a first flow path Fp1 that communicates laterally (the left side in FIG. 6) is formed in the third accommodation groove G3, and a second flow path Fp2 that communicates laterally (the right side in FIG. 6) is formed in the second accommodation groove G2. Further, a screw hole Sh is formed in the side wall of the housing H (the left wall in FIG. 6) close to the first flow path Fp1. By attaching a first pipe (not shown) to this screw hole Sh via a seal joint (not shown) and a fastening bolt (not shown), the first pipe is fluid-connected to the first flow path Fp1. Similarly, a screw hole Sh is formed in the side wall of the housing H (the right wall in FIG. 6) close to the second flow path Fp2. By attaching a second pipe (not shown) to this screw hole Sh via a seal joint (not shown) and a fastening bolt (not shown), the second pipe is fluid-connected to the second flow path Fp2.

[0069] In the first embodiment, the shape of the housing H as shown in FIG. 6 has been described, but this is only an example, and any shape may be used as long as the housing H has an insertion hole and an outer shape into which the flow rate adjustment valve 100a can be inserted.

[0070] <Regarding the attachment process> The process of attaching the flow control valve 100a to the housing H will be described. The valve body 40 of the flow control valve 100a is inserted into the first accommodation groove G1 along the axial direction L of the housing H. Then, using a jig (not shown) such as a wrench, it is engaged with the outer peripheral surface of the jig engaging portion 45 having a shape with two parallel surfaces or a hexagonal shape, etc., and rotated. While screwing the male screw engaging portion 40scm of the valve body 40 with the female screw engaging portion Hscf of the housing H, the stepped portion 48 of the valve body 40 is moved to the one - end side in the axial direction L until it abuts against the stepped portion provided between the first accommodation groove G1 and the second accommodation groove G2 in the housing H. In the attached state of this flow control valve 100a, the valve port 1a defined by the valve body 40 communicates with the first flow path Fp1 into which the primary - side pressure is introduced, and the side port 1b defined by the valve body 40 communicates with the second flow path Fp2 into which the secondary - side pressure is introduced. At this time, the second shaft seal member O2 is sandwiched between the third accommodation groove G3 and the second annular groove 47 of the valve body 40, the space between the second accommodation groove G2 and the third accommodation groove G3 is sealed, and the first shaft seal member O1 is sandwiched between the first accommodation groove G1 and the first annular groove 46, and the space between the first accommodation groove G1 and the external environment is sealed.

[0071] <Regarding the conventional problem (troubles to the control board due to high - humidity air)> As described above, in the conventional flow control valve shown in FIG. 11, in case 1 where the working fluid is in a refrigeration cycle system that can reach a low temperature (for example, - 40°C, etc.), or in case 2 where the influence of the outside air is relatively large, when each is adopted, the air above or below the accommodation space 1191f in the case body 1191 is cooled and condensed, and locally high - humidity air is generated. At this time, since the high - humidity air has a buoyancy effect as described above, in both case 1 and case 2, the control board 1194 arranged above in the case body 1191, etc., is surrounded by the stagnant high - humidity air and is used outside the allowable humidity range, so it has the conventional problem (troubles to the control board due to high - humidity air), and there is a possibility that the reliability may decrease.

[0072] In contrast, in the first embodiment, by adopting the high-humidity air suppression means (1), the conventional problem (troubles on the control board due to high-humidity air) can be solved, and the reliability can be improved.

[0073] <The high-humidity air suppression means (1) (a humidity-adjusting member that substantially covers the control board in the axial direction)> As shown in FIG. 4, the high-humidity air suppression means (1) (a humidity-adjusting member that substantially covers the control board in the axial direction) is arranged on the inner surface of the lid body 95 such that the humidity-adjusting member 96 that adjusts the humidity within a predetermined range substantially covers the control board 94 when viewed from the direction of the axis L.

[0074] In the first embodiment, by adopting the high-humidity air suppression means (1) (a humidity-adjusting member that substantially covers the control board in the axial direction), as shown in FIG. 6, even if locally high-humidity air is generated in the accommodation space 91f of the case body 91 and the high-humidity air tends to stay mainly in the other-end-side accommodation space 91f2 due to the buoyancy effect of the high-humidity air, it can be effectively absorbed by the humidity-adjusting member 96 arranged at this staying position, so that the inside of the accommodation space 91f can be maintained within the use humidity range. Also, since this humidity-adjusting member 96 substantially covers the control board 94 when viewed from the direction of the axis L and has a relatively high moisture absorption capacity, it is possible to surely prevent the other-end-side accommodation space 91f2 from becoming high-humidity air, that is, the inside of the accommodation space 91f from becoming high-humidity air itself. Therefore, the conventional problem (troubles on the control board due to high-humidity air) can be solved, and the reliability can be improved.

[0075] As described above, in the first embodiment, by adopting the high-humidity air suppression means (1) (a humidity-adjusting member that substantially covers the control board in the axial direction), it is possible to surely prevent the other-end-side accommodation space 91f2 from becoming high-humidity air itself. Therefore, the conventional problem (troubles on the control board due to high-humidity air) can be solved, and the reliability can be improved.

[0076] In addition, in the first embodiment, the humidity control member 96 disposed on the inner surface of the lid 95 was formed of a single continuous sheet, but it is not limited to this, and for example, it may be formed of a plurality of divided sheets.

[0077] (Second Embodiment) The flow rate adjustment valve 100b according to the second embodiment will be described with reference to FIGS. 7 and 8. The flow rate adjustment valve 100b according to the second embodiment is mainly different from the flow rate adjustment valve 100a of the first embodiment in that a humidity control member 96' is employed on the inner peripheral surface of the case body 91, but the other basic configuration is substantially the same as that of the first embodiment. Here, the same components are denoted by the same reference numerals, and redundant descriptions are omitted. Note that the humidity control member 96' has the same configuration as the humidity control member 96.

[0078] <Concerns (Use outside the humidity range of the temporary control board)> In the first embodiment, by adopting the high humidity air suppression means (1) (a humidity control member that substantially covers the control board in the axial direction), the humidity control member 96 disposed at the retention position of the high humidity air effectively absorbs moisture. However, even when the high humidity air locally generated in the accommodation space 91f moves from the one-end-side accommodation space 91f1 to the other-end-side accommodation space 91f2, there was a concern that the control board 94 might be surrounded by high humidity air and used outside the usable humidity range (hereinafter referred to as "Concerns (Use outside the humidity range of the temporary control board)").

[0079] On the other hand, in the second embodiment, by adopting the high humidity air suppression means (2) and (3), the concerns (use outside the humidity range of the temporary control board) can be eliminated, and the reliability can be further improved.

[0080] <High humidity air suppression means (2) (a humidity control member that substantially covers the control board in a direction perpendicular to the axis)> The high-humidity air suppression means (2) (a humidity control member that substantially covers the control board in the direction orthogonal to the axis) is, as shown in Fig. 8(b), a humidity control member 96' that controls the humidity within a predetermined range when viewed from the direction orthogonal to the axis L, and is arranged on the inner peripheral surface (in the second embodiment, two opposing inner peripheral surfaces) of at least one case body 91 so as to substantially cover the control board 94.

[0081] In the second embodiment, by adopting the high-humidity air suppression means (2) (a humidity control member that substantially covers the control board in the direction orthogonal to the axis), when the high-humidity air locally generated in the accommodation space 91f moves from one-end-side accommodation space 91f1 to the other-end-side accommodation space 91f2 through the gap between the control board 94 and the case body 91, the humidity control member 96' is arranged at the position where the flow path width in the movement path of the high-humidity air is the narrowest. Thereby, since the humidity control member 96' effectively absorbs the high-humidity air, the control board 94 can be used within the operating humidity range, and concerns (temporary use outside the operating humidity range of the control board) can be eliminated.

[0082] <High-humidity air suppression means (3) (a humidity control member that substantially covers one-end-side accommodation space in the direction orthogonal to the axis)> The high-humidity air suppression means (3) (a humidity control member that substantially covers one-end-side accommodation space in the direction orthogonal to the axis) is, as shown in Fig. 7, such that the axial length L1 of the one-end-side accommodation space 91f1 is made larger than the axial length L2 of the other-end-side accommodation space 91f2, and when viewed from the direction orthogonal to the axis L, the humidity control member 96' is arranged so as to substantially cover the inner peripheral surface (in the second embodiment, two opposing inner peripheral surfaces) of at least one case body 91 in the one-end-side accommodation space 91f1.

[0083] In the second embodiment, by adopting the high-humidity air suppression means (3) (a humidity control member that substantially covers one end side accommodation space in the direction orthogonal to the axis), the humidity control member 96' is configured such that the high-humidity air locally generated in the accommodation space 91f has its contact time with the high-humidity air intentionally lengthened before moving from the one end side accommodation space 91f1 to the other end side accommodation space 91f2. Thus, the humidity control member 96' is arranged in the one end side accommodation space 91f1 (L1 > L2). As a result, since the humidity control member 96' effectively absorbs the high-humidity air, the control substrate 94 can be used within the operating humidity range, eliminating the concern (temporary use of the control substrate outside the operating humidity range).

[0084] As described above, in the second embodiment, similar to the first embodiment, by adopting the high-humidity air suppression means (1) (a humidity control member that substantially covers the control substrate in the axial direction), it is possible to reliably prevent the other end side accommodation space 91f2 from becoming high-humidity air itself, thus eliminating the conventional problem (troubles on the control substrate due to high-humidity air) and improving the reliability. Further, in the second embodiment, by adopting the high-humidity air suppression means (2) (a humidity control member that substantially covers the control substrate in the direction orthogonal to the axis) and the high-humidity air suppression means (3) (a humidity control member that substantially covers one end side accommodation space in the direction orthogonal to the axis), it is possible to effectively absorb moisture before moving from the one end side accommodation space 91f1 to the other end side accommodation space 91f2, thus eliminating the concern (temporary use of the control substrate outside the operating humidity range) and further improving the reliability.

[0085] In the second embodiment, although all of the high-humidity air suppression means (1) (a humidity control member that substantially covers the control board in the axial direction), the high-humidity air suppression means (2) (a humidity control member that substantially covers the control board in the direction perpendicular to the axis), and the high-humidity air suppression means (3) (a humidity control member that substantially covers the one-end side accommodation space in the direction perpendicular to the axis) are adopted, it is not limited thereto. For example, in the second embodiment, in addition to the high-humidity air suppression means (1) (a humidity control member that substantially covers the control board in the axial direction), either one of the high-humidity air suppression means (2) (a humidity control member that substantially covers the control board in the direction perpendicular to the axis) and the high-humidity air suppression means (3) (a humidity control member that substantially covers the one-end side accommodation space in the direction perpendicular to the axis) may be adopted. Further, in the second embodiment, the humidity control member 96' disposed on one inner peripheral surface of the case body 91 is composed of a continuous single sheet, but it is not limited thereto, and for example, it may be composed of a plurality of divided sheets.

[0086] (Third Embodiment) The flow rate adjustment valve 100c according to the third embodiment will be described with reference to FIGS. 9 and 10. The flow rate adjustment valve 100c according to the third embodiment is different from the flow rate adjustment valve 100b of the second embodiment mainly in that a ventilation and waterproof member 97 is adopted in the case body 91, but the other basic configuration is substantially the same as that of the second embodiment. Here, the same components are denoted by the same reference numerals, and duplicate descriptions are omitted.

[0087] <Regarding Concerns (Deterioration of Sealing Performance due to Marked Pressure Fluctuations)> In the second embodiment, by adopting the high-humidity air suppression means (1) (a humidity control member that substantially covers the control board in the axial direction), the conventional problem (troubles on the control board due to high-humidity air) is solved. In addition to this, in the second embodiment, by adopting the high-humidity air suppression means (2) (a humidity control member that substantially covers the control board in the direction perpendicular to the axis) and the high-humidity air suppression means (3) (a humidity control member that substantially covers the one-end side accommodation space in the direction perpendicular to the axis), the concern (temporary use outside the usable humidity range of the control board) is solved.

[0088] However, through the inventors' intensive research, in the flow rate adjustment valve 100b of the second embodiment, since the humidity control members 96, 96' disposed in the accommodation space 91f are adopted, compared with the conventional flow rate adjustment valve, the pressure fluctuations due to temperature changes (particularly, high temperature state and low temperature state) in the accommodation space 91f are significantly manifested, and there are concerns such as deterioration of the sealing performance on one end side and the other end side of the case body 91, and cracks occurring in the case body 91 itself (hereinafter referred to as "concerns (deterioration of sealing performance due to significant pressure fluctuations)").

[0089] Specifically, in the flow rate adjustment valve 100b of the second embodiment, as shown in FIGS. 7 and 8, when the inside of the accommodation space 91f becomes high temperature, the humidity control members 96, 96' attempt to maintain the relative humidity so that it does not become air with a relative humidity of less than 20% (hereinafter referred to as "low humidity air") by releasing moisture into the accommodation space 91f.

[0090] Here, when x (kg) of water vapor is mixed with 1 (kg) of dry air at a temperature t (°C), the enthalpy h (kJ / kg) of the moist air is given by h = 1.006t + x(2501 + 1.805t). Therefore, the enthalpy h (kJ / kg) of the moist air not only changes depending on the temperature t (°C), but also depends on the amount of water vapor x (kg).

[0091] Accordingly, when the volume of the accommodation space 91f of the case body 91 and the temperature t are constant respectively, as the amount of water vapor x increases due to the moisture release of the humidity control members 96, 96', the enthalpy h, that is, the internal pressure increases, while as the amount of water vapor x decreases due to the moisture absorption of the humidity control members 96, 96', the internal pressure decreases.

[0092] Therefore, in the flow rate adjustment valve 100b of the second embodiment, when the inside of the accommodation space 91f becomes a high temperature state (for example, 80°C etc.), the amount of water vapor increases due to the moisture release of the humidity control members 96, 96', and it is maintained so as not to become low humidity air (for example, 20% or more), so the internal pressure becomes higher compared with the conventional flow rate adjustment valve.

[0093] In contrast, in the flow control valve 100b of the second embodiment, when the temperature inside the storage space 91f becomes low (e.g., -10°C), the amount of water vapor decreases due to moisture absorption by the humidity control members 96, 96', and the air is kept from becoming highly humid (e.g., below 80%), so that the internal pressure is lower than in conventional flow control valves.

[0094] As a result, in the flow control valve 100b of the second embodiment, pressure fluctuations due to temperature changes (especially high and low temperature conditions) are more pronounced than in conventional flow control valves, which could raise concerns (deterioration of sealing properties due to significant pressure fluctuations).

[0095] In contrast, in the third embodiment, by simultaneously adopting a pressure equalization means and a high humidity air suppression means (4), it is possible to eliminate the concern (deterioration of sealing due to significant pressure fluctuations) and maintain the humidity inside the storage space 91f within the operating humidity range, thereby further improving reliability.

[0096] <Pressure equalization means (breathable, waterproof member that equalizes the pressure in the storage space to atmospheric pressure)> The pressure equalizing means (the breathable waterproof member that equalizes the pressure in the storage space to atmospheric pressure) is provided with the breathable waterproof member 97 in the mounting hole 91''h of the case body 91''', which does not interfere with the humidity control members 96, 96'. Specifically, the breathable waterproof member 97 is made of rubber and resin materials, and as shown in Figs. 9 and 10, has an inner opening 97a having a plurality of micropores, and a plurality of through holes 97b having an L-shaped cross section, which always communicate with the inner opening 97a and the external environment. The plurality of micropores are larger than the molecules in air and much smaller than water droplets (for example, several μm), so that the breathable waterproof member 97 can have dustproof and waterproof functions from the outside while maintaining breathability. In this embodiment, the breathable waterproof member 97 is made of a porous member, but is not limited to this. For example, a non-porous humidity control member that hardly allows water vapor to pass under low humidity conditions but allows water vapor to pass easily under high humidity conditions may be used.

[0097] <High-humidity air suppression means (4) (humidity control member arranged along the direction of the breathable waterproof member)> The high-humidity air suppression means (4) (the humidity control member arranged along the direction in which the ventilation and waterproof member faces) is such that, as shown in FIGS. 9 and 10, the humidity control members 96, 96' are arranged along the direction L97a (inflow direction) in which the inner opening 97a of the ventilation and waterproof member 97 faces.

[0098] In the third embodiment, both the pressure equalization means and the high-humidity air suppression means (4) (the humidity control member arranged along the inflow direction of the ventilation and waterproof member) are employed. Thereby, when there is a temperature change (particularly, a high-temperature state and a low-temperature state) in the accommodation space 91f, the accommodation space 91f is equalized to atmospheric pressure via the ventilation and waterproof member 97, so that concerns (deterioration of the sealing performance due to significant pressure fluctuations) can be eliminated. Also, even when there is an inflow of low-humidity air or high-humidity air from the external environment via the ventilation and waterproof member 97, since the humidity control members 96, 96' are arranged along the direction in which the inner opening 97a of the ventilation and waterproof member 97 faces, the inflowing low-humidity air or high-humidity air is quickly humidity-controlled, and by maintaining the inside of the accommodation space 91f within the usable humidity range, the reliability can be further improved.

[0099] As described above, in the third embodiment, similar to the second embodiment, by adopting the high-humidity air suppression means (1) (a humidity control member that substantially covers the control board in the axial direction), the conventional problem (troubles on the control board due to high-humidity air) can be solved, and the reliability can be improved. Also, in the third embodiment, similar to the second embodiment, by adopting the high-humidity air suppression means (2) (a humidity control member that substantially covers the control board in the direction perpendicular to the axis) and the high-humidity air suppression means (3) (a humidity control member that substantially covers one end side accommodation space in the direction perpendicular to the axis), the concern (temporary use outside the humidity range of the control board) can be solved, and the reliability can be further improved. Furthermore, in the third embodiment, by simultaneously adopting the pressure equalization means and the high-humidity air suppression means (4) (a humidity control member arranged along the inflow direction of the ventilation waterproof member), the concern (deterioration of the sealing performance due to significant pressure fluctuations) can be solved, and the inside of the accommodation space 91f can be maintained within the use humidity range. Even when there is an inflow of low-humidity air or high-humidity air from the external environment through the ventilation waterproof member 97, the reliability can be further improved.

[0100] In addition, in the third embodiment, as shown in FIG. 10, the cable 94b is arranged so as not to block the flow in the direction in which the inner opening 97a of the ventilation waterproof member 97 faces. Also, in the third embodiment, by appropriately setting the total opening area of the inner opening 97a to be small, while maintaining the pressure equalization function through the ventilation waterproof member 97, the entry and exit of air (low-humidity air or high-humidity air) between the accommodation space 91f and the external environment can be suppressed as much as possible. Furthermore, the ventilation waterproof member 97 in the third embodiment is provided on the case body 91''', which does not interfere with the humidity control members 96, 96'. However, it is not limited to this. For example, it may be provided on at least one of the case body 91''' and the lid 95 that does not interfere with the humidity control members 96, 96'. In addition, in the third embodiment, the humidity control members 96, 96' arranged along the direction L97a (inflow direction) in which the inner opening 97a of the ventilation waterproof member 97 faces are each composed of a single continuous sheet. However, it is not limited to this. For example, they may each be composed of a plurality of divided sheets.

[0101] <Others> Although Connector Joint Deformation Examples 1 or 2 in the first embodiment are adopted for the first embodiment, they are not limited thereto. For example, they may be adopted for the second embodiment and the third embodiment. Needless to say, the flow rate adjustment valves 100a to 100c of the present embodiment are applicable to any fluid device and fluid circuit including a refrigeration cycle. Furthermore, the present invention is not limited to the above-described embodiments, and appropriate changes and modifications can be made without departing from the technical idea of the present invention.

Description of Reference Numerals

[0102] 100a, 100b, 100c Flow rate adjustment valve 1a Valve port 1b Side port 2 Valve chamber 3 Sealed space 10 Flow rate adjustment valve main body portion 20 Support member 21 Fixing fitting 21a Through hole 23 Threaded hole 23a Female threaded portion 24 Bearing hole 25 Slide hole 26 Guide rail 27 Cylindrical portion 30 Connection member 30scm Male screw engagement portion 40 Valve body 40scf Female screw engagement portion 40scm Male screw engagement portion 41 Insertion hole 42 Valve seat 43 Opening 44 Outer peripheral surface 45 Fixture engagement portion 46 First annular groove 47 Second annular groove 48 Step portion 50 Drive shaft 51 Threaded portion 51a Male threaded portion 52 Guide portion 53 Flange portion 60 valve body part 61 valve holder 61a one end part 61b the other end part 62 valve body 63 washer 64 spring receiver 65 compression coil spring 70 coil member 71 coil part 72 claw part 80 rotor unit 81 cam 81a recess 82 magnet rotor 84 magnet part 85 disk part 86 metal fitting 87 rib 90 stator coil unit 91,91’,91’’,91’’’ case body 91a one end opening 91b the other end opening 91c seal member accommodation groove 91d support part 91e notch part 91f accommodation space 91f1 one end side accommodation space 91f2 the other end side accommodation space 91’’’h mounting hole 92,92’,92’’ connector 92a’,92a’’ flange part 92b’,92b’’ joint part 92c’’ seal packing 93 stator coil 93a bracket 93a1 convex part 94 control board 94a connection terminal 94b cable 94c support hole 95 lid body 95a annular vertical wall 96,96’ humidity control member 97 ventilation and waterproof member 97a Inner opening 97b Through hole Ad Adhesive Fp1 First flow path Fp2 Second flow path G1 First receiving groove G2 Second receiving groove G3 Third receiving groove H Housing Hscf Female screw thread engagement part h Enthalpy of moist air (kJ / kg) L Axis L1 Axial length of one - end side accommodation space L2 Axial length of the other - end side accommodation space L97a Direction in which the inner opening faces O1 First shaft seal member O2 Second shaft seal member Oc Case body seal member (seal member) Sc1 First screw - thread part Sc2 Second screw - thread part Sh Screw hole t Temperature (°C) x Water vapor amount (kg)

Claims

1. A case body having one end opening and the other end opening into which the flow rate adjustment valve body can be fitted, and having an inner diameter that expands along the axial direction from the one end opening to the other end opening; A seal member disposed on the inner peripheral surface of the one end opening and capable of sealing the gap between the one end opening and the flow rate adjustment valve body; A stator coil having a cylindrical shape and disposed on the inner peripheral side of the case body between the one end opening and the other end opening; A lid for sealing the other end opening; A control board that divides the accommodation space defined between the lid and the stator coil in the case body into a one-end side accommodation space and a the other-end side accommodation space, is electrically connected to the stator coil, and controls a drive signal to the stator coil; High humidity air suppression means having a humidity control member in the form of a sheet and capable of adjusting the humidity within a predetermined range; Comprising: The one-end side accommodation space and the other-end side accommodation space are always in communication with each other; The high humidity air suppression means is characterized in that, when viewed in the axial direction, the humidity control member is disposed on the inner surface of the lid so as to substantially cover the control board. A stator coil unit.

2. The high humidity air suppression means is characterized in that, when viewed in a direction orthogonal to the axis, the humidity control member is disposed on the inner peripheral surface of at least one of the case bodies so as to substantially cover the control board. The stator coil unit according to claim 1.

3. The high humidity air suppression means makes the axial length of the one-end side accommodation space larger than the axial length of the other-end side accommodation space, and When viewed in a direction orthogonal to the axis, the humidity control member is disposed so as to substantially cover the inner peripheral surface of at least one of the case bodies in the one-end side accommodation space. The stator coil unit according to claim 1.

4. Further comprising pressure equalizing means, The pressure equalizing means provides a ventilation waterproof member at a position that does not interfere with the humidity control member in at least one of the lid and the case body, The high humidity air suppression means is characterized in that the humidity control member is disposed along the direction L in which the inner opening of the ventilation waterproof member faces. The stator coil unit according to claim 3.

5. Comprising a connector for a power supply terminal to the control board, The stator coil unit according to claim 1, characterized in that the connector is integrally formed with the lid or the case body.

6. It is provided with a connector for a power supply terminal to the control board, The stator coil unit according to claim 1, wherein the connector is fixed to the lid or the case body via a joint portion.

7. The stator coil is provided with a bracket protruding from one end side, The case body is provided with a notch extending in the axial direction on the inner peripheral surface of the other end side of the one end opening, The stator coil unit according to claim 1, wherein the stator coil is positioned in the circumferential direction with respect to the case body by engaging the bracket of the stator coil with the notch of the case body.

8. A stator coil unit according to claim 7 and a flow rate adjustment valve body portion attached to the stator coil unit, The bracket of the stator coil has a convex portion protruding in the inner diameter direction, The flow rate adjustment valve body portion includes a can extending in the axial direction and having a bottomed cylindrical shape, On the same circumference of the outer peripheral surface of the can, there is at least one recessed portion recessed in the inner diameter direction and having a shape corresponding to the convex portion, A flow rate adjustment valve characterized in that the stator coil unit is positioned in the axial direction and the circumferential direction with respect to the flow rate adjustment valve body portion by engaging the convex portion of the stator coil with the recessed portion of the can.

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