JP7349420B2 - Electric valve and refrigeration cycle system - Google Patents

Description

The present invention relates to an electric valve and a refrigeration cycle system.

Generally, in an electric valve that adjusts the opening degree of a valve port by moving the valve body forward and backward, a means for generating rotational driving force such as a stepping motor is provided, and a screw feeding mechanism that converts rotational motion into linear motion is provided. It may be provided. As such an electric valve, one has been proposed that is provided with a contact portion that is disposed on one of a rotary drive section and a fixed drive section and contacts the other (see, for example, Patent Document 1). In the electric valve described in Patent Document 1, by providing a contact portion, a clearance is ensured between the male thread and the female thread in the screw feeding mechanism, and vibrations generated by this clearance are absorbed to suppress operating noise. ing.

JP 2018-119613 Publication

However, the motor-operated valve described in Patent Document 1 has a disadvantage in that it tends to be difficult to assemble when providing a contact portion. For example, when attempting to provide a contact portion at a position where the rotary drive unit and the fixed drive unit face each other in the radial direction, the attachment position tends to be hidden from view from the outside, making the attachment work difficult.

An object of the present invention is to provide a motor-operated valve that can improve assembly efficiency while reducing operating noise, and a refrigeration cycle system equipped with the motor-operated valve.

The motor-operated valve of the present invention includes a valve housing, a valve body that changes the opening degree of a valve port of a valve chamber provided in the valve housing, a rotational drive means that rotates a rotor shaft, and a rotational drive means that rotates the rotor shaft. A motor-operated valve comprising: a screw feeding mechanism that moves the valve body forward and backward in the axial direction by converting it into a linear movement; a rotating side unit including a rotating side member constituting the screw feeding mechanism; a fixed-side unit including a fixed-side member constituting a feeding mechanism, and a biasing member that applies a biasing force to move the rotation-side unit and the fixed-side unit away from each other in a plane perpendicular to the axial direction; The biasing member includes an attached portion that extends to intersect with the axial direction and is attached to one of the rotation side unit and the fixed side unit, and the rotation side unit and the fixed side unit. It is characterized by having a sliding contact portion that slides on the other of the units, and a deformed portion that extends along the axial direction between the attached portion and the sliding contact portion.

According to the present invention as described above, since the biasing member is provided, the operating noise in the screw feeding mechanism can be reduced. Further, since the attached portions extend so as to intersect with each other in the axial direction, the attached portions can be attached to the attachment target in an overlapping manner from the axial direction, for example. Therefore, compared to a configuration in which the attached portion extends in the axial direction, the attachment work to the attachment target becomes easier, and the ease of assembly can be improved.

In this case, in the electric valve of the present invention, the attached part has a passage part through which the rotor shaft can pass, and is sandwiched from the axial direction by at least two parts constituting the rotation side unit. Preferably, it is attached to the rotating unit. According to such a configuration, work such as adhesion or welding is not necessary, and the ease of assembly can be further improved.

Further, in the electric valve of the present invention, the rotation side unit includes a magnet provided along the inner circumferential surface of the cylindrical magnet accommodating part, and the attached part is the magnet in the axial direction. It may be fixed to the end face on the valve closing side. The end face of the magnet on the valve-closing side is less likely to interfere with other members, making it easier to assemble. Furthermore, since the deformable part extends along the axial direction between the attached part and the sliding contact part, the attached part and the sliding contact part can be appropriately shifted in the axial direction. , it is possible to easily bring the sliding contact portion into sliding contact with a desired position of the fixed side unit.

Further, in the electric valve of the present invention, the attached portion may be attached to the fixed unit. According to such a configuration, even if the rotor shaft moves in a straight line, the biasing member does not move in a straight line, and the relative position between the meshing portion of the screw feeding mechanism and the biasing member (particularly the sliding contact portion) does not change. That is, the biasing force acting on the meshing portion does not change easily, and even if the position of the valve body changes, it is easy to suppress operating noise.

Further, in the electric valve of the present invention, the biasing member is entirely formed of a sheet metal, and is continuous with an end of the sliding contact portion on the opposite side to the deformed portion and extends away from the object of sliding contact. It is preferable to have a separation part. According to such a configuration, since the biasing member has the separation portion, it is possible to suppress the edge of the sheet metal forming the biasing member from slidingly contacting the sliding target. Therefore, the frictional force generated during sliding contact can be reduced, and wear and noise can be suppressed.

The refrigeration cycle system of the present invention is a refrigeration cycle system including a compressor, a condenser, an expansion valve, and an evaporator, and wherein any of the electric valves described above is used as the expansion valve. It is characterized by the presence of According to the present invention as described above, as described above, it is possible to improve assembly efficiency while reducing operating noise.

According to the electric valve and refrigeration cycle system of the present invention, ease of assembly can be improved while reducing operating noise.

FIG. 1 is a sectional view showing an electrically operated valve according to an embodiment that is an example of the present invention. FIG. 3 is a perspective view showing a biasing member of the electric valve. It is a system diagram showing a refrigeration cycle system provided with the electric valve. It is a sectional view showing the electric valve concerning the 1st modification. It is a sectional view showing the electric valve concerning the 2nd modification. It is a sectional view showing the electric valve concerning the 3rd modification. FIG. 3 is an enlarged cross-sectional view showing a main part of the electric valve.

Embodiments of the present invention will be described with reference to the drawings. The electric valve 1 of this embodiment is used in a refrigeration cycle system of an air conditioner such as a package air conditioner or a room air conditioner, and includes a valve housing 2, a valve body 3, a valve holder 4, and a support member 5. , a stepping motor 6, and a biasing member 7.

The valve housing 2 includes a valve housing main body 20A and an upper cover 20B, and the upper cover 20B is fixed to an upper end of the valve housing main body 20A, which will be described later, by brazing. The valve housing main body 20A is formed in a cylindrical shape, and accommodates the valve body 3 and the valve holder 4 in the valve chamber 2A inside thereof. Hereinafter, the axial direction of the valve housing main body 20A will be referred to as the Z direction, and the two directions orthogonal to the Z direction will be referred to as the X direction and the Y direction, respectively. In addition, below, the upper and lower sides in the Z direction are based on FIG. 1, and the upper side is the valve open side, and the lower side is the valve closed side. A joint pipe 21 communicating with the valve chamber 2A is attached to the side surface of the valve housing body 20A, and a cylindrical opening 22 is formed at the lower end. An end portion of a joint pipe 23 extending in the Z direction is inserted through and connected to the cylindrical opening 22, and a valve seat portion 24 is integrally formed therein. The joint pipe 23 communicates with a valve port 25 of the valve seat portion 24 .

The valve body 3 is fitted and suspended from the valve holder 4, extends downward from the valve holder 4, and has a needle valve 31 at its tip. The needle valve 31 seats on or leaves the seal portion 26 of the valve seat portion 24, which will be described later.

The valve holder 4 is formed in a cylindrical shape extending along the Z direction, and its upper end is engaged with the lower end of a rotor shaft 61 of the stepping motor 6, which will be described later. That is, the valve holder 4 is suspended by the rotor shaft 61 and is rotatable with respect to the rotor shaft 61. Further, a compression coil spring 41 is provided inside the valve holder 4, and applies a downward load to the valve body 3. For convenience of explanation, the compression coil spring 41 is omitted in FIG. 1 by broken lines.

The support member 5 is fixed to the upper lid 20B at the flange portion 51 so as to close the upper opening of the upper lid 20B in the valve housing 2. The support member 5 includes a guide recess 52 that accommodates the valve holder 4 and guides it in the Z direction, a female thread 53 into which the rotor shaft 61 is screwed, and a space between the guide recess 52 and the stepping motor 6 in a case 62 described later. A communication hole (not shown) communicating with the two is formed.

The stepping motor 6 includes a rotor shaft 61, a case 62, a magnet rotor 63, and a stator coil 64. A magnet rotor 63 whose outer periphery is magnetized with multiple poles is rotatably provided in the case 62 (that is, a magnet rotor 63 as a magnet is housed in the case 62). A rotor shaft 61 is fixed. Further, the case 62 is fixed to the upper lid 20B so as to close the upper opening of the upper lid 20B in the valve housing 2. The stator coil 64 is arranged around the outer periphery of the case 62. The stepping motor 6 rotates the magnet rotor 63 according to the number of pulses given to the stator coil 64 by a pulse signal.

A male threaded portion 611 is formed on the outer circumferential surface of the rotor shaft 61 and is screwed into the female threaded portion 53 of the support member 5 . When the stepping motor 6 is driven, the magnet rotor 63 and the rotor shaft 61 are rotated, and the rotor shaft 61 is moved in the Z direction by a screw feeding mechanism constituted by the male threaded portion 611 and the female threaded portion 53. As a result, the valve holder 4 suspended from the rotor shaft 61 moves in the Z direction while being guided by the guide recess 52 of the support member 5, and the needle valve 31 of the valve body 3 is seated or separated from the seal portion 26. The valve port 25 is opened and closed. Then, the opening degree of the valve port 25 is controlled according to the position (lift amount) of the valve body 3 in the Z direction, and the flow rate of the fluid flowing through the valve port 25 is controlled.

In the above configuration, the support member 5 and the case 62 close the upper opening of the upper cover 20B in the valve housing 2, but they may be used as long as they close the upper opening of the valve housing. For example, if the valve housing does not have an upper cover and is composed only of the valve housing body, the support member and case 62 are directly fixed to the valve housing body, thereby blocking the upper opening of the valve housing. But that's fine.

As described above, the electric valve 1 includes the stepping motor 6 as a rotational drive means, and the screw feeding mechanism that moves the valve body 3 forward and backward in the axial direction by converting the rotational motion of the rotor shaft 61 into linear motion. Be prepared. The rotor shaft 61 as a rotation-side member constituting the screw feeding mechanism and the magnet rotor 63 constitute a rotation-side unit. The support member 5 as a fixed side member (non-rotating member) constituting the screw feeding mechanism and other non-rotating members constitute a fixed side unit. In addition, in the electric valve 1, since the members other than the rotor shaft 61 and the magnet rotor 63 do not rotate (the valve holder 4 may rotate to some extent), these non-rotating members are also included in the fixed side unit. . In this embodiment, the male threaded portion 611 is formed on the rotor shaft 61 as the rotating side member, and the female threaded portion 53 is formed on the support member 5 as the stationary side member. A configuration may also be adopted in which a male screw portion is formed on the fixed side member.

The biasing member 7 is, for example, a leaf spring that is integrally formed of a single band-like sheet metal, and as shown in FIG. 2, it includes an attached part 71, a pair of arm parts 72, It has a pair of separation parts 73. The attached portion 71 extends along the XY plane, which is a plane perpendicular to (intersects with) the Z direction, which is the axial direction, and is formed in a rectangular shape, and is attached to the rotation side unit as described later. A through hole 711 serving as a passage portion is formed in the center portion of the fixed portion 71 (the position where the diagonal lines of the rectangle intersect).

The pair of arm portions 72 are arranged to face each other in the radial direction (direction perpendicular to the Z direction), and are formed in a rectangular plate shape extending downward from the attached portion 71 in the Z direction. Although the arm portion 72 rotates together with the rotating unit, it always extends along a plane that includes the Z direction and is substantially perpendicular to the radial direction. The arm portion 72 comes into sliding contact with the fixed side unit at its lower end as will be described later, and this sliding contact portion becomes a sliding contact portion 721 . A portion of the arm portion 72 above the sliding contact portion 721 becomes a deformable portion 722 . That is, the deformable portion 722 extends along the Z direction between the attached portion 71 and the sliding contact portion 721.

The separation part 73 is continuous with the lower end of the sliding contact part 721, which is the end opposite to the deformation part 722, and extends radially outward so as to separate from the support member 5 that is the object of sliding contact. It extends to The separation portion 73 extends, for example, along the XY plane.

Here, the detailed relationship between the biasing member 7 and other members will be explained. The attached portion 71 is arranged so as to overlap the lower surface of a central portion 631 of the magnet rotor 63 that is fixed to the rotor shaft 61 . Furthermore, the small diameter portion 612 of the rotor shaft 61 is inserted into the through hole 711 of the attached portion 71, that is, the rotor shaft 61 passes through the passage portion. The rotor shaft 61 has a large diameter portion 613 that cannot pass through the through hole 711 at a position spaced apart from the center portion 631 by a predetermined distance. As a result, a portion of the attached portion 71 around the through hole 711 is sandwiched between the lower surface of the central portion 631 and the large diameter portion 613 from the Z direction. In this way, the biasing member 7 is attached to the rotating unit at the attached portion 71. The biasing member 7 may be fixed to the rotating unit so that it rotates simultaneously when the rotor shaft 61 and the magnet rotor 63 rotate, or it may be simply attached to the rotating unit. By doing so, the rotation of the rotor shaft 61 and the magnet rotor 63 may not be transmitted to the biasing member 7 (or may be difficult to be transmitted).

The support member 5 is formed with a small diameter part 55 in which a female threaded part 53 is formed, and a large diameter part 56 located on the proximal side (lower side) of the small diameter part 55. The pair of arm portions 72 sandwich the support member 5 in the radial direction, and the sliding contact portion 721 that is the tip portion (lower end portion) of the arm portion 72 slides on the outer circumferential surface of the large diameter portion 56 . Note that the entire portion of the arm portion 72 located outside the large diameter portion 56 may be in sliding contact with the large diameter portion 56, or only a portion thereof may be in sliding contact.

In the biasing member 7 in its natural state, the distance between the pair of sliding contact portions 721 is smaller than the outer diameter of the large diameter portion 56 . Therefore, when the large diameter portion 56 is placed between the pair of sliding contact portions 721, the arm portion 721 is pushed outward in the radial direction and is deformed, and the biasing member 7 is moved against the large diameter portion 56. Provides a biasing force inward in the radial direction. That is, the biasing member 7 attached to the rotating unit applies a biasing force to move the rotating unit and the stationary unit away from each other in the XY plane (preferably in the radial direction). By applying such a biasing force, even if a clearance is formed between the male threaded portion 611 and the female threaded portion 53 in the screw feeding mechanism, they can rotate relative to each other while maintaining a state in which they are in contact with each other. , it is possible to reduce rattling and reduce operating noise.

The separation part 73 is arranged below the lower end of the magnet rotor 63, and is arranged so that its tip is separated from the case 62.

Next, an example of a refrigeration cycle system in which the electric valve 1 of this embodiment is provided will be described based on FIG. 3. This refrigeration cycle system is used, for example, in an air conditioner such as a household air conditioner. The electric valve 1 is provided between an indoor heat exchanger 101 and an outdoor heat exchanger 104. The electric valve 1, the indoor heat exchanger 101, the four-way switching valve 102, the compressor 103, and the outdoor heat exchanger 104 constitute a refrigeration cycle. The indoor heat exchanger 101 and the electric valve 1 are installed indoors, and the four-way switching valve 102, the compressor 103, and the outdoor heat exchanger 104 are installed outdoors, forming an air-conditioning device.

According to the present embodiment described above, the provision of the biasing member 7 makes it possible to reduce the operating noise in the screw feeding mechanism. Further, since the attached portion 71 extends perpendicularly to the Z direction, the attached portion 71 can be attached to the central portion 631, which is the attachment target, from the Z direction in an overlapping manner. Therefore, compared to a configuration in which the attached portion extends in the Z direction, the attachment work to the attachment target becomes easier, and the ease of assembly can be improved.

In addition, a through hole 711 is formed in the attached part 71, and the attached part 71 is sandwiched and attached between the rotor shaft 61 and the magnet rotor 63, thereby eliminating the need for work such as gluing or welding, and further improving assembly efficiency. can be improved.

Moreover, since the biasing member 7 has the separation part 73, it is possible to suppress the edge of the sheet metal forming the biasing member 7 from slidingly contacting the support member 5, which is the object of sliding contact. Therefore, the frictional force generated during sliding contact can be reduced, and wear and noise can be suppressed.

Note that the present invention is not limited to the embodiments described above, and includes other configurations that can achieve the object of the present invention, and the present invention also includes the following modifications. In each modified example described below, the same components as those in the embodiment described above are given the same reference numerals, and the description thereof will be omitted. In the embodiment described above, the attached part 71 is sandwiched between the rotor shaft 61 and the magnet rotor 63, which are the two parts that constitute the fixed side unit. However, the member of the fixed side unit that sandwiches the attached part 71 is , but not limited to. In the first modification shown in FIG. 4, a ring 65 is attached to the rotor shaft 61, and the attached portion 71 is sandwiched between the center portion 631 and the ring 65 from the Z direction. That is, the ring 65 is formed to have a larger diameter than the small diameter portion 612 of the rotor shaft 61 and cannot pass through the through hole 711, and has the same function as the large diameter portion 613. Moreover, the attached part 71 may be sandwiched between three or more parts that constitute the fixed side unit.

When using the ring 65 as a separate component from the rotor shaft 61 as described above, the ring 65 may be fixed to the rotor shaft 61 by adhesive or the like, or may be fixed by screwing as described below. That is, a female thread may be formed on the inner peripheral surface of the ring 65 and a male thread may be formed on the outer peripheral surface of the rotor shaft 61, and these may be screwed together. At this time, the rotor shaft 61 is fixed to the magnet rotor 63, the biasing member 7 is provided so that the rotor shaft 61 passes through the through hole 711, and then the ring 65 is fastened to the rotor shaft 61. Bye.

Further, in the above embodiment, the through hole 711 is formed in the attached part 71 as a passage part through which the rotor shaft 61 can pass, but a cutout or the like is formed in the attached part as a passage part. may have been done.

Further, in the embodiment described above, the biasing member 7 is attached to the rotating unit, but the biasing member may be attached to the stationary unit. For example, as a second modification, as shown in FIG. 5, a biasing member 8 may be provided that is attached to the stationary unit and slides into contact with the rotating unit. The biasing member 8 is a leaf spring formed of, for example, a band-shaped sheet metal, and integrally includes an attached portion 81, a pair of arm portions 82, a separating portion 83, and a sliding portion 84.

The attached portion 81 extends along the XY plane, and has, for example, an annular shape or a C-shape when viewed from the Z direction. The attached portion 81 is arranged so as to overlap the upper surface of the flange portion 51 of the support member 5, and is attached to the stationary unit by being fixed, for example, by welding or the like. The pair of arm portions 82 extend upward in the Z direction from the inner circumferential edge of the attached portion 81, and are inclined radially outward (that is, away from each other) as they move upward in the Z direction. The separation part 83 is continuous with the upper end of the arm part 82 and is inclined radially inward (away from the magnet rotor 63 constituting the rotating unit) as it goes upward in the Z direction. The sliding contact portion 84 is a corner portion formed between the arm portion 82 and the separation portion 83, and comes into sliding contact with the rotating side unit by contacting the inner circumferential surface of the magnet rotor 63. The arm portion 82 is a deformed portion formed between the attached portion 81 and the sliding contact portion 84 .

In the biasing member 8 in its natural state, the distance between the pair of sliding contact portions 84 is larger than the inner diameter of the magnet rotor 63. Therefore, when the pair of sliding contact portions 84 are arranged inside the magnet rotor 63, the arm portions 82 are flexibly deformed to contract radially inward, and the biasing member 8 is radially outward with respect to the magnet rotor 63. Gives a biasing force to. That is, the biasing member 8 applies a biasing force to move the rotating unit and the stationary unit away from each other in the radial direction.

According to such a second modification, even if the rotor shaft 61 moves linearly, the biasing member 8 does not move linearly, and the meshing portion of the screw feeding mechanism and the biasing member 8 (particularly the sliding contact portion 84) The relative position with respect to the target does not change. That is, the biasing force acting on the meshing portion does not easily change, and even if the position of the valve body 3 changes, it is easy to suppress operating noise.

Further, in the above embodiment, the through hole 711 as a passage part is formed in the attached part 71 of the biasing member 7, and the attached part 71 is attached by being sandwiched between two parts from the Z direction. The mounting position and mounting method of the mounted part are not limited to this. For example, as a third modification, as shown in FIGS. 6 and 7, a biasing member 9 attached to the lower end surface of the magnet rotor 63 may be used. The biasing member 9 is a leaf spring formed of, for example, a strip-shaped sheet metal, and integrally includes an attached portion 91, a pair of arm portions 92, a separating portion 93, and a sliding portion 94.

The attached portion 91 extends along the XY plane, and has, for example, an annular shape or a C-shape when viewed from the Z direction. The attached portion 91 is arranged so as to overlap the lower end surface of the magnet rotor 63, and is attached to the rotation side unit by being fixed, for example, by thermal caulking or the like. Here, the magnet rotor 63 is provided along the inner peripheral surface of the case 62 as a cylindrical magnet housing part, and the lower end surface 632 refers to the magnetic poles of the magnet rotor 63 along the inner peripheral surface of the case 62. Points to the bottom of the part.

The pair of arm parts 92 extend upward in the Z direction from the inner circumferential edge of the attached part 91, and are inclined radially inward (that is, closer to each other) as they go upward in the Z direction. The separation part 93 is continuous with the upper end of the arm part 92 and is inclined radially outward (away from the support member 5 constituting the fixed unit) as it goes upward in the Z direction. The sliding contact portion 94 is a corner formed between the arm portion 92 and the separation portion 93, and comes into sliding contact with the stationary unit by contacting the inner peripheral surface of the large diameter portion 56 of the support member 5. . The arm portion 92 is a deformed portion formed between the attached portion 91 and the sliding contact portion 94.

In the biasing member 9 in its natural state, the distance between the pair of sliding contact portions 94 is smaller than the outer diameter of the large diameter portion 56 . Therefore, when the support member 5 is disposed between the pair of sliding contact parts 94, the arm part 92 is bent and deformed so as to be pushed outward in the radial direction, and the biasing member 9 is Gives an inward bias. That is, the biasing member 9 applies a biasing force to move the rotating unit and the stationary unit away from each other in the radial direction.

According to such a third modification, interference with other members is less likely to occur in the vicinity of the lower end surface of the magnet rotor 63, making it easier to assemble. Furthermore, since the arm portion 92 extends along the Z direction between the attached portion 91 and the sliding contact portion 94, the attached portion 91 and the sliding contact portion 94 can be appropriately shifted in the Z direction. The sliding contact portion 94 can be easily brought into sliding contact with a desired position of the fixed unit.

Further, the mounting position and method of mounting the portion to which the biasing member is mounted, and the object of sliding contact of the sliding contact portion are not limited to those described above. In particular, the method for attaching the attached part may be appropriately selected depending on the shape, material, etc. of the attachment target. Further, the attached portion only needs to intersect with the axial direction, and may have some inclination with respect to a plane perpendicular to the axial direction.

Furthermore, in the embodiment described above, the entire biasing member 7 is formed of a sheet metal, and the separating portion 73 is formed therein, but the present invention is not limited to such a configuration. That is, the biasing member may be composed of a plurality of members (for example, an elastic member and a rigid body), and the separating portion may not be formed. For example, a sliding member made of fluororesin may be provided at the edge of the sheet metal, and this portion may be used as a sliding contact portion. Further, by using a sheet metal having a predetermined thickness or by chamfering the edges of the sheet metal, the frictional force generated during sliding contact may be reduced while using the edges as sliding contact parts. This also applies to the first to third modified examples.

Further, in the embodiment described above, the biasing member 7 has a pair of sliding contact portions 721 and a pair of deformation portions 722, but the number of sliding contact portions and deformation portions is arbitrary. This also applies to the first to third modified examples. At this time, a plurality of sliding contact parts and deformation parts may be provided evenly so that the resultant force of the urging force becomes 0, or one sliding contact part and deformation part may be provided, or a plurality of sliding contact parts and deformation parts may be provided. The resultant force of the urging force may be prevented from becoming zero by providing the deforming portions unevenly. That is, in the screw feeding mechanism, the central axes of the male threaded portion and the female threaded portion may coincide with each other, or there may be some deviation between the central axes.

In addition, in the embodiment and the first to third modifications, the electric valve 1 has only one valve body 3, but for example, it has a main valve and a sub valve, and the valve opening degree can be adjusted in two stages. The adjustable motor-operated valve may be provided with a biasing member. In addition, the electric valve provided with the biasing member is not limited to the above-mentioned form as long as it is provided with a rotational drive means such as a stepping motor and a screw feeding mechanism.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the design may be changed without departing from the gist of the present invention. Even if there is, it is included in the present invention.

DESCRIPTION OF SYMBOLS 1... Electric valve, 2... Valve housing, 2A... Valve chamber, 25... Valve port, 3... Valve body, 5... Support member (fixed side member), 6... Stepping motor (rotation drive means), 61... Rotor shaft ( Rotating side member), 62... Case (magnet accommodating part), 63... Magnet rotor (magnet), 7 to 9... Biasing member, 71, 81, 91... Mounted part, 711... Through hole (passing part), 721 , 84, 94...Sliding contact part, 722, 82, 92...Deformation part, 73, 83, 93... Separation part

Claims (6)

A valve housing, a valve body that changes the opening degree of a valve port of a valve chamber provided in the valve housing, a rotation drive means that rotates a rotor shaft, and a rotary drive means that converts the rotational motion of the rotor shaft into a linear motion. An electric valve comprising a screw feeding mechanism that moves the valve body forward and backward in the axial direction,
a rotation-side unit including a rotation-side member constituting the screw feeding mechanism;
a fixed side unit including a fixed side member constituting the screw feeding mechanism;
a biasing member that applies a biasing force to move the rotating unit and the stationary unit away from each other in a plane orthogonal to the axial direction;
The biasing member includes an attached part that extends to intersect with the axial direction and is attached to one of the rotating unit and the stationary unit, and an attached part that extends between the rotating unit and the stationary unit. An electric valve comprising: a sliding contact portion that slides on the other of the two, and a deformable portion that extends along the axial direction between the attached portion and the sliding contact portion. The attached part has a passage part through which the rotor shaft can pass, and is attached to the rotating unit by being sandwiched from the axial direction by at least two parts constituting the rotating unit. The electric valve according to claim 1. The rotation side unit includes a magnet provided along the inner circumferential surface of the cylindrical magnet accommodating part,
The electric valve according to claim 1, wherein the attached portion is fixed to an end face of the magnet on the valve closing side in the axial direction. The electric valve according to claim 1, wherein the attached portion is attached to the stationary unit. The biasing member is entirely formed of a sheet metal, and has a separating portion that is continuous with an end of the sliding contact portion opposite to the deformed portion and extends away from the object of sliding contact. The electric valve according to any one of claims 1 to 4. A refrigeration cycle system comprising a compressor, a condenser, an expansion valve, and an evaporator, wherein the electric valve according to any one of claims 1 to 5 is used as the expansion valve. A refrigeration cycle system characterized by:

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