Electric valve

Abstract

The present invention provides an electric valve that can stabilize the flow of a fluid and reduce noise. The first sound-absorbing member (7) disposed in the flow path from the communication path (421) to the sub-valve port (41a) has a higher density than the second sound-absorbing member (8) disposed in the flow path from the sub-valve port (41a) to the main valve port (23a). Thus, the first sound-absorbing member (7) subdivides bubbles to reduce noise, and the fluid flowing out from the sub-valve port (41a) passes through the second sound-absorbing member (8) with a low density, and it is difficult for the fluid to stay when passing through the second sound-absorbing member (8). Therefore, the flow of the fluid can be stabilized and the noise can be reduced.

Description

Technical Field

[0001] The present invention relates to an electric valve. Background Art

[0002] Conventionally, as an electric valve, a flow rate adjustment valve having a first valve element portion and a second valve element portion and capable of becoming a small flow rate control state or a large flow rate control state has been proposed (for example, refer to Patent Document 1). In the flow rate adjustment valve described in Patent Document 1, a sound deadening member is provided in the communication path of the connecting shaft of the valve shaft, and a sound deadening member is also provided in the communication path of the valve element member. By providing the sound deadening member in this way, both the reduction of noise and the reduction of pressure loss in the large opening region are achieved.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2017-211034 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] However, in an electric valve that can be in a small flow rate control state or a large flow rate control state as described in Patent Document 1, the fluid that has passed through (flowed out of) the valve port (sub-valve port) corresponding to the small flow rate control is likely to be in an unstable state (a state in which large and small bubbles are mixed) and is likely to become a jet flow. Therefore, even if a sound deadening member is arranged on the downstream side of the sub-valve port, it is difficult for the fluid to pass through the sound deadening member, and there is a case where the fluid becomes an even more unstable state and the noise cannot be sufficiently reduced.

[0008] An object of the present invention is to provide an electric valve that can stabilize the flow of fluid and reduce noise.

[0009] Means for Solving the Problems

[0010] The electric valve of the present invention includes: a valve housing; a main valve element that changes the opening degree of the main valve port in the main valve chamber of the valve housing; a sub-valve element that changes the opening degree of the sub-valve port in the sub-valve chamber of the main valve element; and a drive unit that axially moves the sub-valve element forward and backward. The electric valve is formed with a communication path that connects the main valve chamber and the sub-valve chamber. The electric valve is characterized by including: a first sound deadening member that is arranged in the flow path from the communication path to the sub-valve port; and a second sound deadening member that is arranged in the flow path from the sub-valve port to the main valve port. The first sound deadening member and the second sound deadening member are formed in a manner of subdividing the flow path, and the first sound deadening member has a higher density than the second sound deadening member.

[0011] According to the present invention described above, the first silencing member disposed in the flow path from the communication path to the sub-valve port has a higher density than the second silencing member disposed in the flow path from the sub-valve port to the main valve port. Thus, after the fluid passes through the first silencing member with a high density, it passes through the second silencing member with a low density. Thereby, in a state where the bubbles are sufficiently subdivided by the first silencing member, the fluid flows toward the sub-valve port, so that noise can be reduced, and the fluid flowing out from the sub-valve port passes through the second silencing member with a low density, and it is difficult for the fluid to stay when passing through the second silencing member. Therefore, the flow of the fluid can be stabilized, and the noise can be further reduced.

[0012] At this time, in the electric valve of the present invention, preferably, the communication path is formed on the side surface of the cylindrical portion of the main valve core, and an annular space along the cylindrical portion is formed between the communication path and the first silencing member. According to such a structure, it is easy for the fluid to reach the first silencing member after passing through the annular space in a circulating manner, and the speed of the fluid can be reduced before reaching the first silencing member.

[0013] In addition, in the electric valve of the present invention, preferably, a plurality of the communication paths communicating with the annular space are formed on the side surface of the cylindrical portion. According to such a structure, compared with the structure of introducing the fluid into the sub-valve chamber from one communication path, the deviation of the flow rate of the fluid in the circumferential direction can be reduced.

[0014] In addition, in the electric valve of the present invention, preferably, the annular space and the first silencing member are arranged side by side in the axial direction of the annular space. According to such a structure, the extending direction of the communication path formed in the cylindrical portion and the direction from the annular space toward the first silencing member intersect, and the speed of the fluid can be reduced before reaching the first silencing member.

[0015] In addition, in the electric valve of the present invention, preferably, the first silencing member and the second silencing member are filters formed in a three-dimensional mesh shape. More preferably, the first silencing member and the second silencing member are formed in a three-dimensional mesh shape by randomly bending linear members. According to such a structure, by randomly bending the linear members, the silencing member has a passing portion with passing areas of various sizes as the passing portion through which the fluid can pass. Therefore, even when the fluid contains bubbles of various sizes, it is easy to perform fine bubbling.

[0016] Advantages of the Invention

[0017] According to the electric valve of the present invention, the flow of the fluid can be stabilized and the noise can be reduced. Description of the Drawings

[0018] Figure 1 It is a cross-sectional view of an electric valve showing an embodiment of an example of the present invention.

[0019] Figure 2 It is a cross-sectional view showing an enlarged main part of the above-mentioned electric valve.

[0020] Figure 3 It is a cross-sectional view showing the communication path and the annular space of the above-mentioned electric valve.

[0021] In the figure:

[0022] 1—Electric valve, 2—Valve housing, 23a—Main valve port, 2R—Main valve chamber, 4—Main valve core, 41a—Sub-valve port, 412—Annular space, 42—Cylindrical part, 421—Communication path, 4R—Sub-valve chamber, 5—Sub-valve core, 6—Drive part, 7—First sound-absorbing member, 8—Second sound-absorbing member. Detailed implementation mode

[0023] Referring to the attached drawings, the implementation mode of the present invention will be described. The electric valve 1 of the present implementation mode is used, for example, in the refrigeration cycle system of air conditioners such as assembled air conditioners and indoor air conditioners, and as Figure 1 shown, it includes a valve housing 2, a guiding member 3, a main valve core 4, a sub-valve core 5, a drive part 6, a first sound-absorbing member 7, and a second sound-absorbing member 8. The main valve core 4 and the sub-valve core 5 are arranged to move along a predetermined axial direction. Hereinafter, this axial direction will be set as the Z direction, and the two directions orthogonal to the Z direction will be set as the X direction and the Y direction. The up and down in the Z direction are Figure 1 used as a reference.

[0024] The valve housing 2 is formed in a substantially cylindrical shape, for example, from brass, stainless steel, etc., and has a main valve chamber 2R inside it. The valve housing 2 has a first port 21 that opens on one side in the X direction and a second port 22 that opens on the lower side in the Z direction on its side surface. A first joint pipe 11 extending in the X direction is connected to the first port 21, and a second joint pipe 12 extending in the Z direction is connected to the second port 22. The first joint pipe 11 and the second joint pipe 12 communicate with the main valve chamber 2R. The first joint pipe 11 and the second joint pipe 12 can be fixed to the valve housing 2 by, for example, brazing or the like.

[0025] A cylindrical main valve seat 23 protruding toward the main valve chamber 2R side (upward) in the Z direction is formed at the lower end of the valve housing 2. The inside of the main valve seat 23 becomes the main valve port 23a, and the main valve port 23a communicates with the second port 22. That is, the second joint pipe 12 is conducted to the main valve chamber 2R via the main valve port 23a. In the present implementation mode, the electric valve 1 is used in such a way that the first port 21 is set as the primary side and the second port 22 is set as the secondary side, and the fluid (refrigerant) flowing into the main valve chamber 2R from the first joint pipe 11 flows out from the second joint pipe 12. However, the electric valve 1 can also be installed in a cycle in which the fluid can flow in both directions.

[0026] The guide member 3 is installed in the opening at the upper end of the valve housing 2 and has: a press-fitting portion 31 that is press-fitted into the inner peripheral surface of the valve housing 2; a substantially cylindrical guide portion 32 that is located inside the press-fitting portion 31; a support portion 33 that extends upward from the guide portion 32; a limiting portion 34 that is provided above the support portion 33; and an annular flange portion 35 that is located on the outer periphery of the guide portion 32. The press-fitting portion 31, the guide portion 32, the support portion 33, and the limiting portion 34 are formed as an integral resin member. In addition, the flange portion 35 is a metal plate made of, for example, brass, stainless steel, etc., and the flange portion 35 is integrally provided with the resin press-fitting portion 31 and the support portion 33 by insert molding.

[0027] The guide member 3 is assembled to the valve housing 2, and the flange portion 35 is fixed to the upper end portion of the valve housing 2 by welding. In addition, on the guide member 3, a cylindrical guide hole 32a having the Z direction as its axis is formed in the guide portion 32, and an insertion hole 33a coaxial with the guide hole 32a is formed at the center of the support portion 33. In addition, an internal thread portion (thread hole) 34a coaxial with the guide hole 32a and the insertion hole 33a is formed at the center of the limiting portion 34.

[0028] The main spool 4 is disposed in the guide hole 32a of the support portion 33 and is integrally formed in a cylindrical shape with the Z direction as its axis as shown in Figure 2 . The main spool 4 integrally has: a partition portion 41 that extends along the XY plane and approaches or separates from the sub-spool 5; a cylindrical portion 42 that extends from the partition portion 41 toward the side opposite to the main valve port 23a (upper side); and a main valve portion 43 that approaches or separates from the main valve seat 23.

[0029] The partition portion 41 is a sub-valve seat portion provided at the lower end portion of the cylindrical portion 42 and is formed in a plate shape having a predetermined plate thickness (Z direction dimension). A bottomed cylindrical portion is formed by the partition portion 41 and the cylindrical portion 42, and the inside of the bottomed cylindrical portion becomes the sub-valve chamber 4R. A sub-valve port 41a serving as a through hole is formed at the center of the partition portion 41. The cylindrical portion 42 is formed in a cylindrical shape, and a pressing member 93 described later is provided inside it. The inner peripheral surface of the pressing member 93 functions as a needle guide hole. A guiding boss portion 53 attached to a valve shaft 51 described later is inserted through the needle guide hole, and an annular stopper 44 is fixed to the upper end of the cylindrical portion 42 by fitting or welding. In addition, a main valve spring 4a is disposed between the stopper 44 and the upper end portion of the guide hole 32a, and the main spool 4 is biased in the direction of the main valve seat 23 (Z direction lower side; closing direction) by the main valve spring 4a.

[0030] As shown in Figure 3As shown, a plurality of (eight in the present embodiment) communication paths 421 that communicate the inside and outside thereof are formed in the cylindrical portion 42. The eight communication paths 421 are arranged at equal intervals in the circumferential direction centered on the Z direction. By forming the communication paths 421 in the cylindrical portion 42, the main valve chamber 2R, the sub-valve chamber 4R, the sub-valve port 41a, and the main valve port 23a communicate with each other.

[0031] In addition, a cylindrical portion 411 extending toward the upper side in the Z direction, an annular space 412 located outside the cylindrical portion 411, and an inclined surface 413 continuous with the lower surface of the annular space 412 are formed in the partition portion 41. The sub-valve port 41a is formed inside the cylindrical portion 411. The annular space 412 is formed in an annular shape along the inside of the cylindrical portion 42, and the plurality of communication paths 421 communicate therewith. The inclined surface 413 is inclined so as to face upward as it goes toward the inner peripheral side from the lower end portion of the communication path 421, and is connected to the lower surface of the annular space 412. Thus, when viewed from the radial direction, the communication path 421 and the annular space 412 overlap, and the annular space 412 is arranged slightly eccentrically upward.

[0032] The main valve portion 43 is formed in a substantially cylindrical shape so as to extend the cylindrical portion 42 to a position lower than the partition portion 41. The main valve portion 43 is configured to seat (abut) on the main valve seat 23 in the fully closed state.

[0033] The sub-valve core 5 is a needle valve, which is provided at the lower end portion of a rotor shaft 61 described later, and integrally has a valve shaft 51 connected to the rotor shaft 61 side and a needle portion 52 connected to the lower end of the valve shaft 51. The sub-valve core 5 further has a guiding boss portion 53 fixed to the valve shaft 51. The guiding boss portion 53 is fixed as a separate body from the valve shaft 51, but the guiding boss portion 53 may be formed integrally with the valve shaft 51. The guiding boss portion 53 is slidably inserted into a needle guiding hole formed by a pressing member 93.

[0034] The drive portion 6 is provided inside and outside a housing 24 fixed to the upper end of the valve housing 2, and includes a stepping motor 6A, a screw feed mechanism 6B that moves the sub-valve core 5 forward and backward by the rotation of the stepping motor 6A, and a limit mechanism 6C that limits the rotation of the stepping motor 6A. The housing 24 is hermetically fixed to the valve housing 2 by, for example, welding.

[0035] The stepping motor 6A is composed of a rotor shaft 61, a magnetic rotor 62 rotatably disposed inside the housing 24, a stator coil (not shown) disposed opposite to the magnetic rotor 62 on the outer periphery of the housing 24, and other magnetic yokes, exterior components, etc. The rotor shaft 61 is mounted via a bushing at the center of the magnetic rotor 62, and an external thread portion 61a is formed on the outer periphery of the rotor shaft 61 on the side of the guide member 3. The external thread portion 61a is threadedly engaged with the internal thread portion 34a of the guide member 3, whereby the guide member 3 supports the rotor shaft 61 on the axis along the Z direction. Further, the internal thread portion 34a of the guide member 3 and the external thread portion 61a of the rotor shaft 61 constitute a thread feed mechanism 6B.

[0036] The first sound deadening member 7 is integrally formed in an annular shape so that the valve shaft 51 and the needle portion 52 can pass therethrough, and is disposed in the flow path from the communication path 421 to the sub-valve port 41a. The first sound deadening member 7 is a filter formed in a three-dimensional mesh by randomly bending a linear member. The first sound deadening member 7 can be, for example, a demister. The first sound deadening member 7 formed in such a mesh shape functions to subdivide the flow path, and the fluid (refrigerant) passes through the first sound deadening member 7 while being subdivided. That is, when the fluid in a gas-liquid mixed state passes through the first sound deadening member 7, the bubbles are subdivided. At this time, in the first sound deadening member 7, since the linear member is randomly bent, as a passage portion through which the fluid can pass, there are passage areas of various sizes. In addition, when the fluid passes through the inside of the first sound deadening member 7 along a predetermined passage direction, the passage area changes according to the passage direction position. Thereby, bubbles of various sizes are subdivided.

[0037] As Figure 2As shown, the first silencing member 7 is fixed within the cylindrical portion 42 of the main spool valve 4 by a pair of fixing members 91A, 91B and a pressing member 93. The first silencing member 7 is clamped from the Z direction by the pair of fixing members 91A, 91B, and the pressing member 93 is disposed above the fixing members 91A, 91B. The first silencing member 7, the fixing members 91A, 91B, and the pressing member 93 are clamped and fixed from the Z direction by the partition portion 41 and the stopper 44. At this time, the first silencing member 7 is disposed above in a manner side by side with the annular space 412 in the Z direction. Communication portions 92A, 92B each formed by a plurality of through holes extending in the Z direction are formed in the pair of fixing members 91A, 91B respectively. Thereby, the annular space 412 and the space where the first silencing member 7 is disposed communicate with each other, and the space where the first silencing member 7 is disposed and the sub-valve chamber 4R communicate with each other. That is, when the fluid flows from the annular space 412 into the sub-valve chamber 4R, it necessarily passes through the first silencing member 7. The pressing member 93 is integrally formed in a cylindrical shape, and thus functions as a pressing portion for pressing the first silencing member 7 as described above, and has an engaging portion 931 with a reduced inner diameter (necked down) at the upper end portion, and the engaging portion 931 can be engaged with the guiding boss portion 53 of the sub-spool valve 5. In addition, the pressing member 93 is made of a sliding member such as PPS resin. Thereby, when the guiding boss portion 53 made of, for example, metal (stainless steel) slides relative to the inner peripheral surface of the pressing member 93 and engages with the engaging portion 931, the sliding resistance can be suppressed.

[0038] In addition, in the present embodiment, the first silencing member 7 is fixed within the cylindrical portion 42 of the main spool valve 4 using the fixing member 91A and the fixing member 91B, but either one of them may be used alone, or the first silencing member 7 may be fixed only by the pressing member 93 without using the fixing members 91A, 91B.

[0039] The second silencing member 8 is disposed in the flow path from the sub-valve port 41a to the main valve port 23a, that is, in a position downstream of the first silencing member 7 when the first port 21 is the primary side. The second silencing member 8 is the same as the first silencing member 7, and is a filter formed in a three-dimensional net shape by randomly bending a linear member, and may be, for example, a demister. The first silencing member 7 has a higher density than the second silencing member 8. Here, the density refers to the mass per unit volume. Thereby, the first silencing member 7 has a higher performance of subdividing bubbles than the second silencing member 8. In addition, parameters such as the thickness of the wire may be made different from each other so that the first silencing member 7 has a higher performance of subdividing bubbles than the second silencing member 8.

[0040] The second sound deadening member 8 is configured to fit (fill without gaps) inside the cylindrical main valve portion 43, so as to be opposed to the sub-valve port 41a in the Z direction. Thereby, when the fluid that has passed through the sub-valve port 41a flows into the main valve port 23a, it necessarily passes through the second sound deadening member 8. The second sound deadening member 8 may be fixed by being fastened by the lower end portion of the main valve portion 43 via, for example, an annular member.

[0041] Here, the detailed opening and closing operations of the main valve element 4 and the sub-valve element 5 in the electric valve 1 will be described. When the magnetic rotor 62 and the rotor shaft 61 are rotated by driving the stepping motor 6A, the rotor shaft 61 moves in the Z direction through the screw feed mechanism 6B of the external thread portion 61a of the rotor shaft 61 and the internal thread portion 34a of the guide member 3. Thereby, the sub-valve element 5 moves forward and backward in the Z direction to approach or move away from the sub-valve port 41a, and the valve opening degree of the sub-valve port 41a is controlled (small flow rate control). In addition, the guiding boss portion 53 of the sub-valve element 5 engages with the engaging portion 931 of the pressing member 93, and the main valve element 4 moves together with the sub-valve element 5 to approach or separate from the main valve seat 23 (large flow rate control). Thereby, the flow rate of the refrigerant flowing from the first joint pipe 11 to the second joint pipe 12 is controlled. In addition, in the present embodiment, even in a state where the sub-valve element 5 moves forward and backward in the Z direction and is closest to the sub-valve seat portion having the sub-valve port 41a, the sub-valve element 5 does not abut (seat) on the sub-valve seat portion, but a gap is formed between the sub-valve element 5 and the sub-valve seat portion to allow the fluid to pass through the sub-valve port 41a, but it may also be configured such that the sub-valve element 5 seats on the sub-valve seat portion.

[0042] An external thread-shaped guide groove 34b is formed on the outer peripheral surface of the limiting portion 34 of the guide member 3, and a slider 63 is provided in the guide groove 34b. The slider 63 abuts on the magnetic rotor 62 and rotates and moves up and down along the guide groove 34b as the magnetic rotor 62 rotates. And the slider 63 constitutes a limiting mechanism 6C that restricts the rotation of the magnetic rotor 62 by abutting on the upper end or the lower end of the guide groove 34b. Through this limiting mechanism 6C, the lowermost position and the uppermost position of the rotor shaft 61 and the magnetic rotor 62 are restricted.

[0043] Here, the flow of the fluid in the electric valve 1 during small flow control will be described. First, the fluid flows into the main valve chamber 2R from the first port 21. This fluid sometimes contains bubbles and becomes a gas-liquid mixed state. Hereinafter, the case where bubbles are contained will be described. The fluid flowing into the main valve chamber 2R flows into the sub-valve chamber 4R via the communication path 421. At this time, the fluid that has passed through the communication path 421 circulates in the annular space 412 and then reaches the inside of the sub-valve chamber 4R through the communication portion 92B of the fixing member 91B, the first silencing member 7, and the communication portion 92A of the fixing member 91A. When the fluid passes through the communication path 421 and heads toward the annular space 412, the direction of flow is along the XY plane. On the other hand, when the fluid flows from the annular space 412 toward the first silencing member 7, the direction of flow is along the Z direction. That is, the direction of flow turns at a substantially right angle, and the flow velocity decreases.

[0044] As described above, the fluid passes through the first silencing member 7, and thus the bubbles are subdivided. Moreover, after the flow of the fluid is throttled by passing through the sub-valve port 41a, the fluid passes through the second silencing member 8 and heads toward the main valve port 23a. At this time, since the density of the second silencing member 8 is lower than the density of the first silencing member 7, it is difficult for the fluid to stay in the second silencing member 8.

[0045] When the fluid passes through (flows out of) the sub-valve port 41a, it is rapidly decompressed. As a result, various sizes of bubbles are easily contained in the fluid, and it is likely to become a jet flowing out of the sub-valve port. Therefore, when the bubble subdivision performance of the first silencing member 7 and the second silencing member 8 is the same (for example, the densities are the same), or when the subdivision performance of the second silencing member 8 is higher than that of the first silencing member 7 (for example, the density is higher), it is difficult for the fluid that has passed through the sub-valve port 41a to pass through the second silencing member, and a part of the fluid stays, and the fluid is likely to become a more unstable state.

[0046] According to the present embodiment described above, the first silencing member 7 disposed in the flow path from the communication path 421 to the sub-valve port 41a has a higher density than the second silencing member 8 disposed in the flow path from the sub-valve port 41a to the main valve port 23a. Thus, the fluid flows toward the sub-valve port 41a in a state where the bubbles are sufficiently subdivided by the first silencing member 7, so that noise can be reduced, and the fluid flowing out of the sub-valve port 41a passes through the low-density second silencing member 8, and it is difficult for the fluid to stay when passing through the second silencing member 8. Therefore, the flow of the fluid can be stabilized, and the noise can be further reduced. At this time, in a structure in which only the high-density first silencing member is provided and the second silencing member is not provided, noise is generated due to the rapid decompression of the fluid at the sub-valve port. However, compared with such a structure, in the present embodiment, the flow of the fluid that becomes unstable by passing through the sub-valve port can be stabilized, and the noise can be sufficiently reduced.

[0047] In addition, by forming an annular space 412 between the communication path 421 and the first sound deadening member 7, the velocity of the fluid can be reduced before reaching the first sound deadening member 7.

[0048] In addition, by forming a plurality of communication paths 421, the deviation of the fluid flow rate in the circumferential direction can be reduced compared to a structure in which fluid is introduced into the sub-valve chamber 4R from one communication path.

[0049] In addition, by arranging the annular space 412 and the first sound deadening member 7 side by side in the Z direction, the extending direction of the communication path 421 and the direction from the annular space 412 toward the first sound deadening member 7 can be made to intersect, and the velocity of the fluid can be reduced before reaching the first sound deadening member 7.

[0050] In addition, the first sound deadening member 7 and the second sound deadening member 8 have passing portions with various passable areas as passing portions through which the fluid can pass by randomly bending a linear member. Therefore, even when the fluid contains bubbles of various sizes, it is easy to perform fine bubbling.

[0051] In addition, the present invention is not limited to the above-described embodiments, and includes other structures and the like that can achieve the object of the present invention. Modifications and the like shown below are also included in the present invention. For example, in the above-described embodiment, the plurality of communication paths 421 are formed at equal intervals, but are not limited to such a structure. That is, the plurality of communication paths may be arranged at different intervals from each other, or only one communication path may be formed.

[0052] In addition, in the above-described embodiment, the annular space 412 and the first sound deadening member 7 are arranged in the Z direction, but the annular space and the first sound deadening member may also be arranged along the extending direction of the communication path, for example.

[0053] In addition, in the above-described embodiment, the annular space 412 is formed between the communication path 421 and the first sound deadening member 7, but it may also be configured such that no annular space is formed and the fluid flows directly from the communication path into the first sound deadening member. With such a structure, it is easy to miniaturize the main spool valve.

[0054] The embodiments of the present invention have been described in detail with reference to the drawings, but the specific structure is not limited to these embodiments, and design changes and the like within the scope not departing from the gist of the present invention are also included in the present invention.

Claims

1. An electric valve, comprising: a valve housing; a main valve core that changes the opening degree of a main valve port in a main valve chamber provided in the valve housing; A sub-valve core that changes the opening degree of a sub-valve port provided in the sub-valve chamber of the main valve core; And a driving part that axially advances and retracts to drive the sub-valve core. A communication path that communicates the main valve chamber and the sub-valve chamber is formed in the electric valve. The electric valve is characterized by comprising: A first sound-absorbing member disposed in the flow path from the communication path to the sub-valve port; and A second sound-absorbing member disposed in the flow path from the sub-valve port to the main valve port. The first sound-absorbing member and the second sound-absorbing member are formed in a manner of subdividing the flow path, and the first sound-absorbing member has a higher density than the second sound-absorbing member.

2. The electric valve according to claim 1, wherein The communication path is formed on the side surface of the cylindrical portion of the main valve core. An annular space along the cylindrical portion is formed between the communication path and the first sound-absorbing member.

3. The electric valve according to claim 2, wherein A plurality of the communication paths communicating with the annular space are formed on the side surface of the cylindrical portion.

4. The electric valve according to claim 2, wherein The annular space and the first sound-absorbing member are arranged side by side in the axial direction of the annular space.

5. The electric valve according to claim 3, wherein The annular space and the first sound-absorbing member are arranged side by side in the axial direction of the annular space.

6. The electric valve according to any one of claims 1 to 5, wherein The first sound-absorbing member and the second sound-absorbing member are filters formed in a three-dimensional mesh shape.

7. The electric valve according to claim 6, wherein The first sound-absorbing member and the second sound-absorbing member are formed in a three-dimensional mesh shape by randomly bending linear members.

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