Electric valve and electric valve body

Abstract

An object of the present application is to provide an electric valve and an electric valve body in which, when a valve mechanism is arranged inside a cylinder member, even if fluid flows in from either side of the cylinder member, the flow rate and flow direction of the fluid are less likely to differ. An electric valve (100) includes: a cylinder member (102) extending in an axial direction, inside which a fluid flows in the axial direction; a rotor (142) arranged inside the cylinder member and rotatable about an axis of the cylinder member; a stator (180) mounted to an outer periphery of the cylinder member and configured to rotate the rotor; a first valve seat (124A) and a second valve seat (124B) arranged opposite each other in the axial direction and symmetrical to each other; a first valve member (156A) and a second valve member (156B) arranged between the first valve seat and the second valve seat; and a feed screw mechanism (190) configured to move the first valve member and the second valve member in the axial direction in response to movement of the rotor in the axial direction.

Description

Technical Field

[0001] This invention relates to an electric valve and an electric valve body. Background Technology

[0002] For example, Patent Document 1 discloses an electric control valve device in which a refrigerant inlet section, a flow control section and a refrigerant outlet section form a generally straight flow path, and the valve core moves in a straight direction as the magnet of the stepper motor rotates, thereby adjusting the opening between the top part of the valve core and the valve seat to control the flow of refrigerant.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent document 1: Japanese Patent Application Publication No. 2007-127256.

[0006] The technical problem that the invention aims to solve

[0007] In the technology described in Patent Document 1, since it is assumed that the refrigerant flows in only one direction, the flow rate and flow pattern of the refrigerant change when the flow direction is different. Summary of the Invention

[0008] The purpose of this invention is to provide an electric valve and an electric valve body that, when the valve mechanism is disposed inside the cylinder component, makes it difficult for the flow rate and flow direction of the fluid to differ even when the fluid flows in from either side of the cylinder component.

[0009] Technical means for solving technical problems

[0010] The first type of electric valve comprises: a cylindrical member extending axially, inside which fluid flows in the axial direction; a rotor disposed inside the cylindrical member and rotatable about an axis of the cylindrical member; a stator mounted on the outer periphery of the cylindrical member to rotate the rotor; a pair of valve seats disposed opposite each other axially inside the cylindrical member and symmetrically shaped to each other; a valve core disposed between the pair of valve seats; and a feed thread mechanism that causes the valve core to move axially as the rotor moves in the axial direction.

[0011] According to the electric valve involved in this method, even if the fluid flows in from either side of the cylinder component, the flow rate and flow pattern of the fluid are unlikely to differ.

[0012] The second type of electric valve is, in the electric valve described in the first type, in which, when the rotor rotates, the valve core approaches one of the pair of valve seats and moves away from the other of the pair of valve seats.

[0013] The electric valve involved in this method has a simpler structure compared to the case where the valve core moves in different axial directions.

[0014] The third type of electric valve is an electric valve described in the first type, wherein the valve core portion is configured to include a pair of valve cores facing opposite directions in the axial direction, and the pair of valve cores move in different directions in the axial direction when the rotor rotates.

[0015] The electric valve involved in this method can control the flow of fluid in both sides of a pair of valve cores.

[0016] The fourth type of electric valve is one in which, in the electric valve described in the third type, the distances between the pair of valve cores and the pair of valve seats that move with the rotation of the rotor are equal.

[0017] In this method, the distances between a pair of valve cores and a pair of valve seats in the electric valve are equal. Therefore, according to this method, the electric valve can ensure that the fluid flowing through the valve port is in the same state even when the fluid flows in from either side of the cylindrical component.

[0018] The fifth type of electric valve body comprises: a cylindrical component extending axially, inside which fluid flows in the axial direction; a rotor disposed inside the cylindrical component and rotatable about the axis of the cylindrical component; a pair of valve seats disposed opposite each other in the axial direction inside the cylindrical component and having a paired symmetrical shape; a valve core disposed between the pair of valve seats; and a feed thread mechanism that causes the valve core to move axially along the axial direction as the rotor moves axially.

[0019] Based on the electric valve body involved in this method, even if the fluid flows in from either side of the cylinder component, the flow rate and flow pattern of the fluid are unlikely to differ.

[0020] The effects of the invention

[0021] According to the present invention, an electric valve and an electric valve body are provided in which, when the valve mechanism is disposed inside the cylinder component, the flow rate and flow direction of the fluid are unlikely to differ even when the fluid flows in from either side of the cylinder component. Attached Figure Description

[0022] Figure 1This is a perspective view illustrating the electric valve and the electric valve body involved in the first embodiment.

[0023] Figure 2 This is a cross-sectional view illustrating the electric valve and the electric valve body involved in the first embodiment.

[0024] Figure 3 This is a cross-sectional perspective view illustrating the main body of the electric valve according to the first embodiment.

[0025] Figure 4 This is a perspective view illustrating the valve portion involved in the first embodiment.

[0026] Figure 5 This is a cross-sectional view illustrating the valve portion involved in the first embodiment.

[0027] Figure 6 This is a cross-sectional view illustrating the operation of the electric valve and the electric valve body according to the first embodiment.

[0028] Figure 7 It continues Figure 6 A cross-sectional view illustrating the operation of the electric valve and the electric valve body according to the first embodiment.

[0029] Figure 8 This is a cross-sectional view illustrating the electric valve and the electric valve body involved in the second embodiment.

[0030] Figure 9 This is a cross-sectional perspective view illustrating the main body of the electric valve involved in the second embodiment.

[0031] Figure 10 This is a perspective view illustrating the valve portion involved in the second embodiment.

[0032] Figure 11 This is a cross-sectional view illustrating the valve mechanism involved in the second embodiment.

[0033] Figure 12 This is a cross-sectional view illustrating the operation of the electric valve and the electric valve body according to the second embodiment.

[0034] Symbol Explanation

[0035] 100, 200 Electric valves; 101, 201 Electric valve bodies; 102, 202 Cylindrical components; 104 Cylindrical section; 106 Small diameter section; 116 Cylindrical section; 118 Cover section; 120 First cover component; 122 Second cover component; 124A First valve seat; 124B Second valve seat; 126A First valve port; 126B Second valve port; 128 External threaded section; 130 Cylindrical section; 132 Cover section; 134 First tube body; 136 Second tube body; 138... 140 First flow path; 142 Second flow path; 144 Rotor; 144 Inner component; 146 Internal threaded part; 148 Outer component; 150, 250 Leaf springs; 151, 251 Outer annular part; 152, 252 Holes; 153, 253 Feet; 154 Inner annular part; 155 Valve mechanism; 156A First valve component (part of valve core); 156B Second valve component (part of valve core); 156C Embedded part; 156L Large diameter part; 15 6P Protrusion; 156S Handle; 156T Valve; 157 First Cylindrical Section; 158 Second Cylindrical Section; 159 Shoulder; 180 Stator; 182 Cutout; 190 Feed Thread Mechanism; 216A First Cylindrical Section; 216B Second Cylindrical Section; 218A First Cover; 218B Second Cover; 220A First Cover Component; 220B Second Cover Component; 224A First Valve Seat; 224B Second Valve Seat; 226A First Valve Port; 226B Second Valve Port; 228A First external thread; 228B Second external thread; 242A First rotor; 242B Second rotor; 246A First internal thread; 246B Second internal thread; 247 Protrusion; 254 Inner annular portion; 256A Valve component (one of a pair of valve cores); 256B Valve component (one of a pair of valve cores); 256P Sheath; 256T Valve portion; 260 Hole; 290A First feed thread mechanism; 290B Second feed thread mechanism. Detailed Implementation

[0036] Hereinafter, an example of an embodiment of the present invention will be described with reference to the accompanying drawings. Furthermore, in each drawing, the same or equivalent constituent elements and components are labeled with the same reference numerals. Additionally, for ease of explanation, the scale ratios in the drawings are exaggerated and sometimes differ from the actual ratios.

[0037] In the description of this invention, the direction of arrow Z is the direction of movement of the valve core in each embodiment. Additionally, the direction of arrow Z is the direction of fluid flow inside the cylinder component of the electric valve. The direction of arrow Z is sometimes referred to as the direction of fluid flow. Furthermore, in the following description, relative to any reference point in any direction, one side is designated as the "first side," and the side opposite to the first side is designated as the "second side."

[0038] [First Implementation Method]

[0039] (structure)

[0040] Figure 1 An electric valve 100 according to a first embodiment of the present invention is shown. For example... Figure 1 As shown, the electric valve 100 includes an electric valve body 101 and a stator 180. Additionally, as... Figure 1 As shown, a first pipe 134 for fluid inflow is connected to the second side of the electric valve body 101 in the direction of arrow Z in the electric valve 100. Additionally, a second pipe 136 for fluid outflow is connected to the first side of the electric valve body 101 in the direction of arrow Z. In this embodiment, the electric valve 100 is, for example, assembled in series in a straight pipeline of an air conditioning unit to control the flow rate of the refrigerant in the air conditioning unit, which is an example of a fluid.

[0041] (Electric valve body 101)

[0042] like Figure 2 and Figure 3 As shown, the electric valve body 101 includes a cylindrical component 102, a rotor 142 disposed inside the cylindrical component 102, a valve mechanism 155, a first cover component 120, and a second cover component 122.

[0043] like Figure 2 and Figure 3 As shown, the cylindrical component 102 is a component with openings on both sides in the direction of arrow Z. Furthermore, in all figures, the axial direction of the cylindrical component 102 (i.e., the direction in which the cylindrical component 102 extends) is consistent with the direction of movement of the first valve component 156A and the second valve component 156B, and also with the direction of fluid flow. In the following description, "axial direction" is consistent with the direction of arrow Z.

[0044] like Figure 2 and Figure 3 As shown, the cylindrical component 102 has a cylindrical portion 104 and a first side that is axially closer to the cylindrical portion 104. Figure 2 (See the left side of the attached diagram) and the smaller diameter portion 106, which is smaller than the cylindrical portion 104. The cylindrical component 102 can also be formed of any material, but as described later, it is formed of a non-magnetic material. As an example, the cylindrical component 102 is made of stainless steel.

[0045] In addition, such as Figure 2 and Figure 3 As shown, a rotor 142, which rotates due to the magnetic field generated by the stator 180, is housed inside the cylindrical portion 104. In this embodiment, as... Figure 2 and Figure 3 As shown, rotor 142 is a tubular permanent magnet that is magnetized by multiple poles.

[0046] like Figure 2 and Figure 3As shown, the valve mechanism 155 is a component disposed inside the rotor 142 and moves axially along the cylindrical portion 104 as the rotor 142 rotates. More specifically, the valve mechanism 155 includes an outer component 148, an inner component 144, a leaf spring 150, a first valve component 156A, and a second valve component 156B.

[0047] like Figure 2 As shown, the outer component 148 is a cylindrical component having a first cylindrical portion 157 with an inner circumferential surface embedded in the rotor 142 and a second cylindrical portion 158 that is axially closer to a first side than the first cylindrical portion 157 and has a smaller diameter than the first cylindrical portion 157. Figure 2 As shown, the outer diameter of the second cylindrical portion 158 is smaller than the inner diameter of the first cylindrical portion 157, and a shoulder 159 is formed between the first cylindrical portion 157 and the second cylindrical portion 158. Furthermore, as... Figure 2 As shown, the inner side of the second cylindrical portion 158 has the function of a flow path for supplying fluid flow.

[0048] like Figure 2 and Figure 3 As shown, the inner component 144 is embedded inside the first cylindrical portion 157 in the outer component 148 and rotates with the rotation of the rotor 142. Furthermore, the inner component 144 has an internal thread 146 that engages with the external thread 128 of the first cover component 120, which will be described later. The engagement of the inner component 144 with the external thread 128 of the first cover component 120 will be described below.

[0049] Furthermore, in the valve mechanism 155 of this embodiment, the leaf spring 150 is clamped and held by the shoulder 159 of the outer member 148 and the inner member 144 on the inner side of the first cylindrical portion 157 in the outer member 148. Figure 3 As shown, the leaf spring 150 has an outer annular portion 151, an inner annular portion 154 with a smaller diameter than the outer annular portion 151, and three legs 153 connecting the outer annular portion 151 and the inner annular portion 154.

[0050] In this embodiment, as described above, the outer ring portion 151 is held by being clamped by the outer member 148 and the inner member 144. Additionally, the foot portion 153 is elastic, allowing the outer ring portion 151 and the inner ring portion 154 to deform in an axially offset manner. The leaf spring 150 can also be formed of any material, but as an example, it is formed of stainless steel.

[0051] In addition, such as Figure 3As shown, in the valve mechanism 155 of this embodiment, the inner annular portion 154 of the first valve component 156A and the second valve component 156B are connected to the outer annular portion 151 via three legs 153. In other words, the three legs 153 are connected to each other by holes 152 of the leaf spring 150 in the axial direction. In other words, the leaf spring 150 allows fluid to flow through the holes 152.

[0052] Furthermore, in the valve mechanism 155 of this embodiment, the first valve component 156A and the second valve component 156B are kept rotatable relative to the inner annular portion 154. More specifically, as Figure 4 and Figure 5 As shown, the first valve component 156A has a cylindrical handle 156S extending axially, a large-diameter portion 156L at its first axial side end that is enlarged relative to the handle 156S, and a protrusion 156P protruding from the large-diameter portion 156L toward the first axial side. Additionally, the first valve component 156A has a valve portion 156T on the second axial side of the handle 156S that tapers axially at its tip and contacts the first valve seat 124A (described later). The second valve component 156B has: a handle 156S that tapers axially at its first axial side; and an insert portion 156C formed at the first axial side end of the handle 156S and having a hole for the protrusion 156P to be inserted. Additionally, the second valve component 156B has a valve portion 156T on the first axial side of the handle 156S that tapers axially at its tip and contacts the second valve seat 124B (described later).

[0053] Furthermore, for the first valve component 156A and the second valve component 156B, with the protrusion 156P inserted into the inner side of the inner annular portion 154, the protrusion 156P engages with the hole in the insert portion 156C. Thus, as... Figure 4 and Figure 5 As shown, the axial movement of the first valve component 156A and the second valve component 156B relative to the inner annular portion 154 is restricted. Furthermore, in this embodiment, the first valve component 156A and the second valve component 156B are rotatable relative to the inner annular portion 154.

[0054] In addition, such as Figure 4 and Figure 5 As shown, the first valve component 156A and the second valve component 156B are combined in a shape that is symmetrical in the axial direction. More specifically, as... Figure 5 As shown, the shapes of the handle 156S and valve portion 156T of the first valve component 156A are axially symmetrical with the shapes of the handle 156S and valve portion 156T of the second valve component 156B. Thus, the first valve component 156A and the second valve component 156B constitute the "valve core" in this embodiment.

[0055] like Figures 1 to 3As shown, the first cover component 120 is a component that closes the second axial side of the electric valve body 101. (As...) Figure 2 As shown, the first cover member 120 has a cover portion 118 that closes the second axial side of the cylindrical member 102 and a cylindrical portion 116 that extends from the cover portion 118 to the first axial side inside the cylindrical member 102.

[0056] In this embodiment, such as Figure 2 As shown, the cover portion 118 is a portion with an outer diameter similar to that of the cylindrical portion 104. A first flow path 138 for fluid flow is formed in the cover portion 118 from the second axial side to the first axial side of the cylindrical portion 116. Furthermore, as... Figure 2 As shown, a first pipe 134 for fluid inflow is connected to the second axial side of the cover 118. When the first pipe 134 is connected to the cover 118, as... Figure 2 As shown, the first pipe body 134 is connected to the first flow path 138 .

[0057] In this embodiment, the axis of the cylindrical portion 116 is the same as the axis of the cylindrical portion 104. In addition, the cylindrical portion 116 has an external thread portion 128 on its outer peripheral surface, which forms an external thread that engages with the internal thread of the inner component 144.

[0058] Furthermore, the end of the cylindrical portion 116 on the first axial side functions as a first valve seat 124A that contacts the valve portion 156T of the first valve component 156A. More specifically, as Figure 2 As shown, the first end on the first side of the first flow path 138 is the first valve port 126A, and the opening degree of the first valve port 126A is adjusted by moving the first valve component 156A relative to the first valve seat 124A.

[0059] Furthermore, the first cover member 120 can be fixed relative to the cylindrical member 102 in any manner, but as an example, the end of the second side of the axial direction of the cylindrical member 102 is fused to the outer peripheral surface of the cover portion 118 of the first cover member 120.

[0060] like Figure 2 and Figure 3 As shown, the second cover component 122 is a component that closes the first axial side of the electric valve body 101. Figure 2 As shown, the second cover member 122 has a cover portion 132 that closes the first axial side of the cylindrical member 102 and a cylindrical portion 130 that extends from the cover portion 132 to the second axial side inside the cylindrical member 102.

[0061] In this embodiment, such as Figure 2As shown, the cover portion 132 has an outer diameter that is the same as the outer diameter of the small diameter portion 106. A second flow path 140 for fluid flow is formed in the cover portion 132 from a first axial side to a second axial side of the cylindrical portion 130. Furthermore, as... Figure 2 As shown, a second pipe 136 for fluid outflow is connected to the first axial side of the cover 132. When the second pipe 136 is connected to the cover 132, as... Figure 2 As shown, the second tube 136 is connected to the second flow path 140.

[0062] In this embodiment, the cylindrical portion 130 and the small-diameter portion 106 are axially aligned. Furthermore, the end of the cylindrical portion 130 on the second axial side functions as a second valve seat 124B that contacts the second valve component 156B. More specifically, as... Figure 2 As shown, the second end on the second side of the axial direction in the second flow path 140 is a second valve port 126B that contacts the second valve component 156B. The opening degree of the second valve port 126B is adjusted by moving the second valve component 156B.

[0063] In addition, such as Figure 2 As shown, the shape of the second valve seat 124B is symmetrical to that of the first valve seat 124A in the axial direction. That is, the first valve seat 124A and the second valve seat 124B are an example of a "pair of valve seats" in this embodiment.

[0064] Furthermore, the first valve seat 124A and the second valve seat 124B are arranged opposite to each other in the axial direction. Therefore, the situation where the first valve component 156A adjusts the opening of the first valve port 126A of the first valve seat 124A and the situation where the second valve component 156B adjusts the opening of the second valve port 126B of the second valve seat 124B are equal to each other. Regardless of which direction the fluid flows from, the flow pattern is the same (or approximately the same).

[0065] Furthermore, the second cover component 122 is fixed by welding the end of the small diameter portion 106 on the first side of the axial direction to the outer peripheral surface of the cover portion 132.

[0066] Furthermore, in the electric valve 100 of this embodiment, the central axis of the first flow path 138 passing through the first cover member 120 is concentric with the central axis of the second flow path 140 passing through the second cover member 122. In addition, the axis center of the cylinder member 102, that is, the rotation axis center of the rotor 142, is concentric with the central axis of the first flow path 138 and the central axis of the second flow path 140.

[0067] like Figure 2 As shown, in this embodiment, the stator 180 is a component disposed on the outer peripheral surface of the cylindrical portion 104. More specifically, as... Figure 2 As shown, the stator 180 is a component whose inner diameter is slightly larger than the outer diameter of the cylindrical portion 104 and is disposed on the cylindrical portion 104.

[0068] Furthermore, the stator 180 generates a magnetic field around the axis of the cylindrical portion 104 based on the control of a control unit (not shown). Since the rotor 142, which is disposed inside the cylindrical portion 104, rotates due to the magnetic field generated by the stator 180, the rotor 142 and the stator 180 constitute a so-called stepper motor.

[0069] In addition, such as Figure 1 As shown, the stator 180 in this embodiment has axially connected cutouts 182 in the circumferential direction. Figure 1 As shown, the width of the cut 182 (i.e., the length of the circumferential gap formed in the stator 180) is slightly larger than the outer diameter of the second tube 136. Therefore, the stator 180 allows the second tube 136 to pass through the cut 182.

[0070] (Adjustment of the opening degree of the first valve port 126A and the second valve port 126B)

[0071] Furthermore, in this embodiment, when the rotor 142 rotates due to the magnetic field generated by the stator 180, the valve mechanism 155 disposed inside the rotor 142 rotates together. Since the internal thread 146 of the inner member 144 engages with the external thread 128 of the first cover member 120, the valve mechanism 155 and the rotor 142 move axially as the inner member 144 rotates. That is, the electric valve 100 in this embodiment has a feed thread mechanism 190 that causes the valve mechanism 155 to move axially as the rotor 142 rotates. Through the feed thread mechanism 190, the opening degree of the first valve port 126A in the first valve seat 124A and the opening degree of the second valve port 126B in the second valve seat 124B, which are a pair of valve seats, can be adjusted as the rotor 142 rotates.

[0072] For example, when the valve mechanism 155 is moved axially to a first side by rotating the rotor 142, the first valve component 156A moves from... Figure 2 The state shown is in contact with the first valve port 126A. Figure 6 The diagram shows the state where the valve is separated from the first valve port 126A. In this state, since the first valve port 126A is not closed by the first valve component 156A, the flow paths from the first flow path 138 to the second flow path 140 are connected. In other words, in Figure 6 In the state shown, fluid can flow from the first flow path 138 to the second flow path 140, or from the second flow path 140 to the first flow path 138.

[0073] Then, through rotor 142 from Figure 6 If the valve mechanism 155 continues to rotate further and moves axially to the first side as shown, the second valve component 156B becomes Figure 7The diagram shows the state of contact with the second valve port 126B. In this state, since the second valve port 126B is closed by the second valve component 156B, the flow path from the first flow path 138 to the second flow path 140 is interrupted. In other words, in Figure 7 In the state shown, fluid cannot flow from the first flow path 138 to the second flow path 140, or from the second flow path 140 to the first flow path 138.

[0074] For example, in the electric valve 100 of this embodiment, when the fluid flows from the first flow path 138 to the second flow path 140, the opening degree of the first valve port 126A is adjusted by the first valve component 156A to control the flow. On the other hand, when the fluid flows from the second flow path 140 to the first flow path 138, the opening degree of the second valve port 126B is adjusted by the second valve component 156B to control the flow.

[0075] Thus, in the electric valve 100 of this embodiment, by rotating the rotor 142, the first valve component 156A and the second valve component 156B move in the same axial direction, thereby adjusting the opening degree of the first valve port 126A or the second valve port 126B. Moreover, by adjusting the opening degree of the first valve port 126A or the second valve port 126B, the flow rate of fluid flowing from the first pipe body 134 to the second pipe body 136, or from the second pipe body 136 to the first pipe body 134, is adjusted.

[0076] Next, the function and effect of the electric valve 100 and the electric valve body 101 involved in this embodiment will be explained.

[0077] (Functions and Effects)

[0078] The electric valve 100 of this method includes a first valve component 156A and a second valve component 156B between a first valve seat 124A and a second valve seat 124B. The first valve component 156A and the second valve component 156B are disposed inside the cylindrical component 102 and are arranged in a symmetrical shape. Furthermore, when the rotor 142 rotates, the first valve component 156A and the second valve component 156B move axially along the inner side of the cylindrical component 102. At least one of the first valve component 156A and the second valve component 156B adjusts the opening degree of the first valve port 126A in the first valve seat 124A or the opening degree of the second valve port 126B in the second valve seat 124B. Thus, in the electric valve 100 of this method, the flow rate of water flowing from a first axial side to a second axial side, or from a second axial side to a first axial side, is controlled within the cylindrical component 102.

[0079] Therefore, according to the electric valve 100 of this method, when fluid flows in from either side of the cylindrical member 102, the opening degree of the first valve port 126A or the second valve port 126B can be adjusted in accordance with the flow direction of the fluid. In other words, according to the electric valve 100 of this method, the difference between the fluid flow (i.e., flow resistance) when the flow direction of the fluid flowing inside the cylindrical member 102 is from the first side to the second side and the fluid flow when the flow direction of the fluid flowing inside the cylindrical member 102 is from the second side to the first side becomes smaller.

[0080] Furthermore, even if the flow direction of the fluid changes, since the flow rate and flow pattern remain the same, no change in control is required when using either flow. That is, according to the electric valve 100, the flow rate can be adjusted regardless of which side the fluid flowing through the cylinder component 102 is flowing in.

[0081] Furthermore, in this method, the first valve component 156A and the second valve component 156B of the electric valve 100 move in the same axial direction when the rotor 142 rotates. In other words, in the electric valve 100 of this method, the flow of fluid is controlled by adjusting the opening degree of the first valve port 126A or the second valve port 126B by either the first valve component 156A or the second valve component 156B.

[0082] Therefore, the structure of the electric valve 100 according to this method is simpler compared to the case where the first valve component 156A and the second valve component 156B move in different directions along the axial direction, respectively.

[0083] Next, refer to Figures 8-11 The electric valve according to the second embodiment of the present invention will be described. Furthermore, in the description of the electric valve according to this embodiment, structures identical to those in the electric valve according to the first embodiment are marked with the same symbols as in the first embodiment, and descriptions are omitted.

[0084] [Second Implementation]

[0085] (structure)

[0086] (Electric valve body 201)

[0087] like Figure 8 and Figure 9 As shown, the electric valve body 201 includes a cylindrical component 202, a first rotor 242A and a second rotor 242B arranged axially on the inner side of the cylindrical component 202, a first valve mechanism 255A and a second valve mechanism 255B, and a first cover component 220A and a second cover component 220B.

[0088] like Figure 8 and Figure 9 As shown, the cylindrical component 202 in this embodiment differs from the cylindrical component 102 in the first embodiment in that its diameter is equal from the axial end to the opposite end. In other words, the cylindrical component 202 in this embodiment differs from the cylindrical component 102 in the first embodiment in that it does not have a small-diameter portion 106.

[0089] like Figure 8 and Figure 9 As shown, the first valve mechanism 255A is disposed inside the first rotor 242A and moves axially along the cylindrical member 202 as the first rotor 242A rotates. More specifically, the first valve mechanism 255A includes a first inner member 244A, a leaf spring 250, and a valve member 256A. Furthermore, the specific shape of the first rotor 242A is the same as that of the rotor 142 in the first embodiment.

[0090] like Figure 8 and Figure 9 As shown, the first inner component 244A is a component that is embedded in the inner circumferential surface of the first rotor 242A and rotates with the rotation of the first rotor 242A. Furthermore, the first inner component 244A has a first internal thread portion 246A, which engages with the first external thread portion 228A of the first cover component 220A, described later. In this embodiment, as an example, the first internal thread portion 246A is a right-hand thread. The engagement of the first inner component 244A with the first external thread portion 228A of the first cover component 220A will be described below.

[0091] Furthermore, in the first valve mechanism 255A of this embodiment, the leaf spring 250 is riveted to the first inner component 244A and thus held in place. Figure 10 As shown, the leaf spring 250 has an outer annular portion 251, an inner annular portion 254 with a smaller diameter than the outer annular portion 251, and three legs 253 connecting the outer annular portion 251 and the inner annular portion 254.

[0092] In this embodiment, such as Figure 10 As shown, the outer annular portion 251 has three holes 260 cut out. Additionally, the protrusion 247 of the first inner component 244A is inserted into the holes 260 and riveted by expanding the diameter of the protrusion 247. Thus, as... Figure 11 As shown, the leaf spring 250 is held in the first inner member 244A. Additionally, the foot 253 is elastic, allowing the outer ring portion 251 and the inner ring portion 254 to deform axially offset. The leaf spring 250 can be formed of any material, but as an example, it is made of stainless steel.

[0093] In addition, such as Figure 10As shown, in the first valve mechanism 255A of this embodiment, the inner annular portion 254 of the retaining valve component 256A is connected to the outer annular portion 251 via three legs 253. In other words, each of the three legs 253 has an axially penetrating hole 252 in the leaf spring 250. Furthermore, the leaf spring 250 allows fluid to flow through the hole 252.

[0094] Furthermore, in the first valve mechanism 255A of this embodiment, the valve component 256A is riveted to the inner annular portion 254 and thus held in place. More specifically, as... Figure 11 As shown, valve component 256A has a cylindrical handle 256S extending axially and a sheath 256P whose end is enlarged relative to a first side axially opposite to the handle 256S. Additionally, valve component 256A has a valve portion 256T on a second side axially opposite to the handle 256S, which tapers axially and contacts a first valve seat 224A described later. The sheath 256P is formed by riveting the valve component 256A with the handle 256S inserted inside the inner annular portion 254. Thus, as... Figure 8 and Figure 11 As shown, the axial movement of valve component 256A relative to the inner annular portion 254 is restricted. Furthermore, in this embodiment, valve component 256A is rotatable relative to the inner annular portion 254.

[0095] like Figure 8 and Figure 9 As shown, the second valve mechanism 255B is disposed inside the second rotor 242B and moves axially along the cylinder member 202 as the second rotor 242B rotates. Furthermore, the specific shape of the second rotor 242B is the same as that of the rotor 142 in the first embodiment.

[0096] In addition, the second valve mechanism 255B includes a second inner component 244B, a leaf spring 250, and a valve component 256B.

[0097] like Figure 8 and Figure 9 As shown, the second inner component 244B is a component that is embedded in the inner circumferential surface of the second rotor 242B and rotates with the rotation of the second rotor 242B. Furthermore, the second inner component 244B has a second internal thread portion 246B, which engages with the second external thread portion 228B of the first cover component 220A, described later. In this embodiment, as an example, the second internal thread portion 246B is a left-hand thread. The engagement of the second inner component 244B with the second external thread portion 228B of the first cover component 120 will be described below. Furthermore, the pitch of the second external thread portion 228B is the same as that of the first external thread portion 228A.

[0098] In addition, such as Figure 8 and Figure 9As shown, the other structures of the second inner component 244B are the same as those of the first inner component 244A. Therefore, the leaf spring 250 is held in the second inner component 244B.

[0099] That is, in this embodiment, the first valve mechanism 255A and the second valve mechanism 255B are symmetrical in the axial direction. That is, the valve components 256A and 256B of the first valve mechanism 255A and the second valve mechanism 255B are examples of "a pair of valve cores" in this embodiment.

[0100] like Figure 8 and Figure 9 As shown, the first cover component 220A in this embodiment has a first cover portion 218A and a cylindrical portion 216A.

[0101] In this embodiment, such as Figure 8 As shown, the first cover portion 218A is a portion with an outer diameter similar to that of the cylindrical component 202. A first flow path 238A for fluid flow is formed in the first cover portion 218A from the second axial side to the first axial side of the cylindrical component 216A. Furthermore, as... Figure 8 As shown, a first pipe 134 for fluid inflow is connected to the second axial side of the first cover 218A. With the first pipe 134 connected to the first cover 218A, as... Figure 8 As shown, the first tube 134 is connected to the first flow path 238A.

[0102] In this embodiment, the axis of the cylindrical portion 216A is the same as that of the cylindrical component 202. Furthermore, the cylindrical portion 216A has a first external thread portion 228A on its outer peripheral surface, which has an external thread that engages with the internal thread of the second inner component 244B. In this embodiment, as an example, the first external thread portion 228A is a right-hand thread.

[0103] Furthermore, the first axial end of the cylindrical portion 216A functions as a first valve seat 224A that contacts the valve portion 256T of the valve component 256A. More specifically, as Figure 8 As shown, in the first flow path 238A, the first end on the first side in the axial direction is the first valve port 226A, and the opening degree of the first valve port 226A is adjusted by moving the valve component 256A relative to the first valve seat 224A.

[0104] Furthermore, regarding the first cover component 220A, the shape and function of the other parts are the same as in the first embodiment.

[0105] like Figure 8 and Figure 9 As shown, the second cover component 220B in this embodiment has a second cover portion 218B and a cylindrical portion 216B.

[0106] The second cover portion 218B is axially symmetrical to the first cover portion 218A. A second pipe body 136 for fluid inflow is connected to the first side of the second cover portion 218B along its axial direction. With the second pipe body 136 connected to the second cover portion 218B, as follows... Figure 8 As shown, the second tube 136 is connected to the second flow path 238B.

[0107] In this embodiment, the axis of the cylindrical portion 216B is the same as that of the cylindrical component 202. Furthermore, the cylindrical portion 216B has a second external thread portion 228B on its outer peripheral surface, which has an external thread that engages with the internal thread of the second inner component 244B. In this embodiment, as an example, the second external thread portion 228B is a left-hand thread.

[0108] That is, in this embodiment, the second cover component 220B is symmetrical to the first cover component 220A in the axial direction. In this embodiment, the first valve seat 224A and the second valve seat 224B are an example of a "pair of valve seats" in this embodiment.

[0109] In this embodiment, the first external thread 228A of the first inner component 244A and the first external thread 228A of the first cover component 220A are right-hand threads. On the other hand, the second external thread 228B of the second inner component 244B and the second external thread 228B of the second cover component 220B are left-hand threads. Therefore, when the first rotor 242A and the second rotor 242B rotate in the same direction, the first valve mechanism 255A and the second valve mechanism 255B move in opposite axial directions relative to each other. That is, the electric valve 200 in this embodiment has a first feed thread mechanism 290A that moves the first valve mechanism 255A axially with the rotation of the first rotor 242A and a second feed thread mechanism 290B that moves the second valve mechanism 255B axially with the rotation of the second rotor 242B. By means of the first feed thread mechanism 290A and the second feed thread mechanism 290B, the opening degree of the valve port in a pair of valve seats can be adjusted with the rotation of the first rotor 242A and the second rotor 242B.

[0110] Furthermore, the axial movement of the first valve mechanism 255A and the second valve mechanism 255B is equal. Moreover, equal axial movement means that the opening degrees of the first valve port 226A and the second valve port 226B are the same in actual use, but may also include industrial errors.

[0111] For example, when the first valve mechanism 255A moves axially to a first side due to the rotation of the first rotor 242A, the valve component 256A moves from... Figure 12 The state shown is in contact with the first valve port 226A. Figure 8 The state shown is that it is separated from the first valve port 226A.

[0112] Furthermore, due to the rotation of the first rotor 242A and the second rotor 242B, the second valve mechanism 255B moves axially to the second side, thus the valve component 256B moves from... Figure 12 The state shown is in contact with the second valve port 226B. Figure 8 The diagram shows the state where the flow path is separated from the second valve port 226B. In this state, the flow path from the first flow path 238A to the second flow path 238B is connected. In other words, in Figure 8 In the state shown, fluid can flow from the first flow path 238A to the second flow path 238B, or from the second flow path 238B to the first flow path 238A.

[0113] Thus, in the electric valve 200 of this embodiment, the rotation of the first rotor 242A and the second rotor 242B causes the valve components 256A and 256B to move in different axial directions. Consequently, the valve components 256A and 256B adjust the opening degree of the first valve port 226A and the second valve port 226B. Then, by adjusting the opening degree of the first valve port 226A and the second valve port 226B, the flow rate of fluid flowing from the first pipe body 134 to the second pipe body 136 or from the second pipe body 136 to the first pipe body 134 is adjusted.

[0114] Next, the function and effect of the electric valve 200 and the electric valve body 201 involved in this embodiment will be explained.

[0115] (Functions and Effects)

[0116] In the electric valve 200 of this method, the valve components 256A and 256B of the first valve mechanism 255A and the second valve mechanism 255B respectively move in different axial directions when the first rotor 242A and the second rotor 242B rotate. In other words, in the electric valve 200 of this method, the valve components 256A and 256B of the first valve mechanism 255A and the second valve mechanism 255B respectively adjust the opening degree of the first valve port 226A and the second valve port 226B in the first valve seat 224A and the second valve seat 224B to control the flow of fluid.

[0117] In this method, the valve components 256A and 256B of the first valve mechanism 255A and the second valve mechanism 255B of the electric valve 200 move the same distance as the first rotor 242A and the second rotor 242B rotate. In other words, the opening degrees of the first valve port 226A and the second valve port 226B of the first valve seat 224A and the second valve seat 224B of the electric valve 200 are equal.

[0118] Therefore, according to the electric valve 200 involved in this method, even if the fluid flows in from either side of the cylinder component 202, the state of the fluid flowing through the first valve port 226A and the second valve port 226B can be made equal.

[0119] [Other Implementation Methods]

[0120] Furthermore, in the above description, both the first cover component 120 and the first cover component 220A are connected to the first tube body 134, and both the second cover component 122 and the second cover component 220B are connected to the second tube body 136. The structures of the electric valve body 101 and the electric valve body 201 in this invention are not limited to this. For example, the "electric valve body" in this invention can also be provided in a portion of a long tube body in the various structures described above. In other words, in this invention, the "electric valve body" is not limited to a single component, but can also be part of a tube body with valve function. The same applies to the electric valve 100 and the electric valve 200 equipped with the stator 180.

[0121] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, it should be understood that any person skilled in the art to which this invention pertains can obviously conceive of various modifications or applications within the scope of the technical concept described in the patent claims, and these are of course also within the technical scope of this invention.

Claims

1. An electric valve, characterized in that, have: A cylindrical component that extends axially, and inside the cylindrical component, fluid flows in the axial direction; A rotor, which is disposed inside the cylindrical component and is capable of rotating about the axis of the cylindrical component; A stator, which is mounted on the outer periphery of the cylindrical component, causes the rotor to rotate; A pair of valve seats, which are arranged opposite each other in the axial direction inside the cylindrical component and are symmetrical to each other; Valve core portion, which is disposed between the pair of valve seats; and A feed thread mechanism that causes the valve core to move axially as the rotor rotates.

2. The electric valve according to claim 1, characterized in that, When the rotor rotates, the valve core approaches one of the pair of valve seats and moves away from the other of the pair of valve seats.

3. The electric valve according to claim 1, characterized in that, The valve core portion is configured to include a pair of valve cores facing opposite directions in the axial direction. When the rotor rotates, the pair of valve cores move in different directions along the axial direction.

4. The electric valve according to claim 3, characterized in that, The distances between the pair of valve cores and the pair of valve seats, which move as the rotor rotates, are equal.

5. An electric valve body, characterized in that, have: A cylindrical component that extends axially, and inside the cylindrical component, fluid flows in the axial direction; A rotor, which is disposed inside the cylindrical component and is capable of rotating about the axis of the cylindrical component; A pair of valve seats, which are arranged opposite each other in the axial direction inside the cylindrical component and are symmetrically paired; Valve core portion, which is disposed between the pair of valve seats; and A feed thread mechanism that causes the valve core to move axially as the rotor rotates.

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