Electric valve

Abstract

An electrically operated valve is provided with: a valve body (12) having a valve chamber (13) inside, a first flow path hole (14) communicating with the valve chamber at a bottom (12a), and a second flow path hole (15) communicating with the valve chamber; a valve body (17) provided so as to be capable of advancing and retreating with respect to a valve seat (16) formed at the valve chamber-side end of the first flow path hole; a rotor (23) which is a component of an electric motor (21) for driving the valve body; and a transmission mechanism (34) that converts the rotation of the rotor into a linear motion and transmits the linear motion to the valve body, and the electrically operated valve is provided with a filter (19) having a mesh-shaped filter main body (19a) through which the fluid can pass and a support part (19b) that supports the filter main body. The support portion is fixed to the valve body so that the fluid passing through the first flow path hole passes through the filter body portion.

Description

Technical Field

[0001] This invention relates to an electric valve, and more particularly to an electric valve equipped with a filter for capturing foreign objects. Background Technology

[0002] Previously, electric valves that used stepper motors or other electric motors to control the valve opening were used in refrigeration cycle devices with refrigerant circuits, such as air conditioners, refrigeration units, and cooling units.

[0003] In addition, in refrigeration cycle devices like those described above, box-type electric valves are sometimes used. In this way, the electric valve can be assembled into the refrigeration cycle device simply by inserting the electric valve (valve body) like a box into the valve mounting hole of the housing that has the inlet and outlet passages for the refrigerant.

[0004] For box-type valves, for example, when the manufacturer of the electric valve supplies the product to the manufacturer of the refrigeration cycle unit, the valve manufacturer and the customer share specifications such as the external dimensions of the valve body and the position of each flow path orifice in advance. If the customer manufactures the housing as part of the refrigeration cycle unit, the electric valve can be easily assembled into the refrigeration cycle unit by simply inserting the housing. Therefore, the customer can manufacture the refrigeration cycle unit efficiently. Furthermore, when the electric valve needs to be replaced during maintenance, the replacement operation can be performed with the same ease.

[0005] In addition, there is a patent document 1 that discloses such an electric valve.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2018-173102

[0009] However, it is preferable to include a filter within the flow path in this electric valve. This is because burrs and other metal fragments generated during manufacturing can sometimes become trapped in the fluid over time. These foreign objects can become stuck between the valve core and seat during valve closure, damaging both and sometimes causing valve leakage.

[0010] Furthermore, when a filter is included, the opening area of ​​the filter (sieve aperture) must be kept constant or larger to avoid obstructing fluid flow, necessitating a certain filter size. Therefore, especially in box-type electric valves where the valve body is compactly configured as a valve mounting hole inserted into the housing, it is not advisable to include a filter from a space perspective, raising concerns about increasing the size of the valve body. Summary of the Invention

[0011] Therefore, the object of the present invention is to remove foreign matter from the fluid to prevent valve leakage, and thereby integrate the filter assembly into the cassette electric valve without making the valve body larger.

[0012] To solve the aforementioned technical problems and achieve the objective, the electric valve of the present invention comprises: a valve body having a valve chamber inside and a first flow path hole communicating with the valve chamber at the bottom, and a second flow path hole communicating with the valve chamber; a valve core configured to move forward and backward relative to a valve seat formed at the valve chamber side end of the first flow path hole; a rotor being a component of an electric motor that drives the valve core; and a transmission mechanism that converts the rotation of the rotor into linear motion and transmits it to the valve core. The electric valve further comprises a filter having a mesh filter body portion that allows fluid to pass through and a support portion that supports the filter body portion, the support portion being fixed to the valve body such that fluid passing through the first flow path hole passes through the filter body portion.

[0013] In the electric valve of the present invention, a filter for capturing foreign matter in the fluid is provided on the first flow path orifice side of the valve body. This filter has a mesh filter body portion and a support portion for supporting the filter body portion. The support portion is fixed to the valve body such that fluid passing through the first flow path orifice passes through the filter body portion; typically, the support portion is fixed to the bottom of the valve body where the first flow path orifice is formed. This removes foreign matter from the fluid and prevents valve leakage. Furthermore, regarding the support portion, the phrase "the support portion is fixed to the valve body" is not limited to the case where the support portion is directly fixed to the valve body; it also includes the concept of indirect fixing, such as fixing via other components.

[0014] Furthermore, in the electric valve according to the present invention, the support portion is fixed to the outer peripheral surface of the bottom of the valve body in a manner that covers the bottom of the valve body. This is to avoid making the electric valve (valve body) larger. More specifically, according to the fixing structure described above, the diameter of the filter increases (for example, compared to the case where the filter is installed inside the first flow path hole), and the surface area of ​​the filter can be increased. Therefore, the height of the filter can be reduced accordingly (shortening the length in the axial direction, i.e., the length along the flow path), and the situation where the valve body becomes larger due to the installation of the filter can be avoided.

[0015] In addition, if the support is fixed to the outer circumference of the valve body as described above, the fixing part (support) of the filter, which is not directly related to the capture of foreign objects, can be freed from the flow path, thus avoiding the situation where the support disturbs the fluid flow.

[0016] Furthermore, the electric valve according to the first aspect of the present invention can be installed in the housing by inserting into the valve mounting hole of the housing. The housing has a valve mounting hole, a first flow path opening on the bottom surface of the valve mounting hole, and a second flow path opening on the inner peripheral surface of the valve mounting hole. The second flow path hole opens on the outer peripheral surface of the valve body. When the valve body is inserted into the valve mounting hole, the first flow path hole communicates with the first flow path, and the second flow path hole communicates with the second flow path.

[0017] Furthermore, in the electric valve described above, the filter body is configured to protrude into the inflow path of the housing when the valve body is inserted into the valve mounting hole.

[0018] According to the present invention, foreign matter in the fluid can be removed to prevent valve leakage, and the filter can be incorporated into the cassette electric valve without increasing the size of the valve body.

[0019] Other objects, features, and advantages of the invention will become clearer from the following description of embodiments of the invention based on the accompanying drawings. Furthermore, in the figures, the same symbols denote the same or equivalent parts. Attached Figure Description

[0020] Figure 1 This is a longitudinal sectional view showing the electric valve (closed state) according to the first embodiment of the present invention.

[0021] Figure 2 This is a diagram showing the electric valve (open state) according to the first embodiment described above.

[0022] Figure 3 This is a longitudinal sectional view showing the electric valve (open state) according to the second embodiment of the present invention. Detailed Implementation

[0023] (First Implementation)

[0024] Reference Figures 1 to 2 The electric valve according to the first embodiment of the present invention will be described. Furthermore, mutually orthogonal two-dimensional coordinates representing the vertical and horizontal directions are appropriately shown in the figures, and the following description is based on these directions. However, the electric valve of the present invention and this embodiment (and the second embodiment described later) can be used in various directions; these directions are provided for ease of explanation, and the configuration of various parts of the present invention is not limited by these directions.

[0025] like Figures 1 to 2 As shown, the electric valve 11 according to the embodiment of the present invention is a box-type electric valve that can be assembled into the refrigeration cycle device by screwing it into the valve mounting hole 51a of the housing 51 of the refrigeration cycle device, such as a heat pump refrigeration and heating system.

[0026] Furthermore, the electric valve 11 includes: a valve body 12 having a valve chamber 13 inside, and having an inlet hole (corresponding to the first flow path hole of the present invention) 14 and an outlet hole (corresponding to the second flow path hole of the present invention) communicating with the valve chamber 13; a valve core 17 configured to be movable forward and backward (up and down) relative to a valve seat 16, the valve seat 16 being formed at the valve chamber side end of the inlet hole 14; a motor 21 driving the valve core 17; a reduction mechanism 30 reducing the rotation of the motor 21; a transmission mechanism 34 converting the rotation reduced by the reduction mechanism 30 into linear motion and transmitting it to the valve core; a housing (sealed container) 28 forming a sealed space in the upper part of the valve body 12; a connecting member 35 connecting the valve body 12 and the housing 28; and a filter 19 capturing foreign matter in the refrigerant.

[0027] The housing 51 has an inflow path (corresponding to the first flow path of the present invention) 52 for refrigerant to flow in and an outflow path (corresponding to the second flow path orifice of the present invention) 53 for refrigerant to flow out. The inflow path 52 extends vertically upward from the bottom surface of the housing 51 and opens at the bottom surface of the valve mounting hole 51a. The outflow path 53 extends horizontally from the side surface of the housing 51 and opens at the inner circumferential surface of the valve mounting hole 51a.

[0028] On the other hand, the inflow hole 14 of the valve body 12 vertically (in the vertical direction) penetrates the bottom (also called the "valve body bottom") 12a, which is the lower end portion of the valve body 12, and opens on the bottom surface of the valve body 12. Furthermore, this bottom 12a is inserted into the upper end of the inflow path 52 of the housing 51 when the electric valve 11 is installed in the housing 51 (when the valve body 12 is positioned in the valve mounting hole 51a). Additionally, a stepped portion 12b is formed on the lower outer peripheral surface of the valve body bottom 12a for mounting the support portion 19b of the filter 19, which will be described later.

[0029] On the other hand, in this embodiment, the outlet hole 15 of the valve body 12 is located on the left side, right side, front side, and rear side (the front-to-back direction is the same as the back-to-back direction). Figure 1 The valve body 12 is formed by four through holes that horizontally penetrate the peripheral wall of the valve body 12 in the direction orthogonal to the plane of the paper. In addition, at the upper part (upper outer peripheral surface of the valve body 12) and the lower part (outer peripheral surface of the bottom 12a of the valve body) of these four through holes (outlet holes) 15, sealing elements (O-rings) 18 are provided in a manner that surrounds the valve body 12 and are located between the inner peripheral surface of the valve mounting hole 51a and the inflow path 52 and the valve body 12. An annular flow path space clamped by these sealing elements 18 is formed between the housing 51 (inner peripheral surface of the valve mounting hole 51a) and the outer peripheral surface of the valve body 12.

[0030] Therefore, when the electric valve 11 is installed in the housing 51 (with the valve body 12 disposed within the valve mounting hole 51a), the inlet hole 14 communicates with the inlet path 52, and the outlet hole 15 communicates with the outlet path 53 via the aforementioned annular flow path space. Furthermore, to fix the valve body 12 to the housing 51, an internal thread is formed on the upper inner circumferential surface of the valve mounting hole 51a, and an external thread that engages with the internal thread is formed on the upper outer circumferential surface of the valve body 12.

[0031] The filter 19 is provided at the bottom 12a of the valve body. The filter 19 has a filter body portion 19a with sieve-like openings (mesh) that allows refrigerant to pass through but traps foreign objects, and an annular support portion 19b that supports the filter body portion 19a. The filter body portion 19a has a deep disc-shaped (shallow cup-shaped) shape with a flat bottom surface. Furthermore, the filter 19 covers the stepped portion 12b of the bottom 12a of the valve body via the support portion 19b. Alternatively, the support portion 19b is embedded in the outer side (outer circumferential surface) of the stepped portion 12b of the bottom 12a of the valve body (or, conversely, the stepped portion 12b of the bottom 12a of the valve body is embedded in the inner side of the support portion 19b), and is thus fixed to the bottom 12a of the valve body.

[0032] The filter 19 is fixed in the manner described above to avoid increasing the size of the valve body 12 due to the inclusion of the filter 19. That is, with the fixed structure described above, the diameter of the filter 19 increases, thereby increasing the surface area of ​​the filter body 19a. Consequently, the height dimension (vertical dimension) h of the filter body 19a can be kept relatively small, avoiding the need for additional space to accommodate the filter 19 (e.g., extending the bottom 12a of the valve body 12 downwards to form a space for accommodating the filter 19).

[0033] In this embodiment, the motor 21 driving the valve core 17 is a stepper motor. The stepper motor 21 consists of a stator 22 and a rotor 23. The stator 22 is fixed to the outer side (outer periphery) of a bottomless, covered (open bottom and closed top) cylindrical housing 28 of the connecting member 35, covering the upper surface of the connecting member 35. The rotor 23 is rotatably disposed on the inner side (inner periphery) of the housing 28. Furthermore, the housing 28 is engaged with the upper outer periphery of the connecting member 35 via an annular base plate 29.

[0034] The stator 22 has a magnetic yoke 24, a coil 26 with windings wound on a winding tube 25, and a resin-molded cover 27 covering the magnetic yoke 24 and the coil 26. On the other hand, inside the rotor 23, as the aforementioned reduction mechanism 30, a unique planetary gear mechanism with a high reduction rate and conducive to miniaturization is provided. The rotation of the rotor 23 is reduced by this reduction mechanism 30, transmitted to and output from the output shaft 31 located at the center of the lower surface of the rotor 23.

[0035] A cylindrical bearing component 32 is disposed at the lower part of the rotor 23, and the output shaft 31 is supported by the bearing component 32 so that it can rotate. The bearing component 32 is fixed to the connecting component 35.

[0036] The connecting component 35 is a component that connects the valve body 12 and the housing 28 to the upper surface of the valve body 12 where the motor 21 is located. However, the connecting component 35, together with the lower spring support component 40 described later, is screwed into the connecting opening 12c formed on the upper surface of the valve body 12, thereby closing the connecting opening 12c, which serves as the upper surface opening of the valve chamber 13.

[0037] Furthermore, the connecting member 35 is a cylindrical member having a large-diameter hole 35a and a small-diameter hole 35b that are interconnected through holes. The large-diameter hole 35a penetrates the upper center of the connecting member 35 and has a larger diameter so that the bearing member 32 can be inserted from above. The small-diameter hole 35b penetrates the lower center of the connecting member 35 and has a smaller diameter. The bearing member 32 is inserted into the large-diameter hole 35a in the upper part of the connecting member and is fixed by riveting.

[0038] An insertion hole 32a is formed at the center of the upper surface of the bearing component 32, into which the output shaft 31 is rotatably inserted. On the other hand, an internal thread portion 32b is formed at the lower center of the bearing component 32, which engages with an external thread portion 33b formed on the outer peripheral surface of the thread drive component 33. These bearing components 32 (internal thread portion 32b) and the thread drive component 33 (external thread portion 33b) form a threaded feed mechanism 34, constituting the aforementioned transmission mechanism 34 that converts the rotational motion supplied from the stepper motor 21 via the reduction mechanism 30 into linear motion in the up-down direction and transmits it to the valve core 17.

[0039] Here, the rotor 23 and the output shaft 31 rotate without moving up and down in a constant position in the vertical direction. A flat-head screwdriver-shaped plate 33a, located at the upper end of the thread drive component 33, is inserted into a slit-shaped fitting groove 31a at the lower end of the output shaft 31, transmitting the rotational motion of the rotor 23 (output shaft 31) to the thread drive component 33. By sliding the plate 33a in the vertical direction within the fitting groove 31a of the output shaft 31, the output shaft 31 will not move in the vertical direction as long as the rotor 23 rotates. Nevertheless, the thread drive component 33 moves linearly in the vertical direction via the aforementioned thread feed mechanism 34.

[0040] The linear motion of the threaded drive component 33 is transmitted to the valve core 17 via a spherical joint 38 composed of a ball 36 and a ball bearing 37, and an upper spring support component 39. The valve core 17 consists of a valve core body 17a that is separated from the valve seat 16 and a stepped cylindrical valve core base 17b that rises upward from the center of the upper surface of the valve core body 17a. Furthermore, the upper spring support component 39 and the valve core 17 (valve core base 17b) are connected by fitting a fitting hole (lower surface fitting hole) 39a formed at the center of the lower surface of the upper spring support component 39 into the upper end of the valve core base 17b. In addition, a fitting hole (upper surface fitting hole) 39b is also provided at the center of the upper surface of the upper spring support component 39, and the ball bearing 37 is inserted into the upper surface fitting hole 39b. Furthermore, the upper spring support member 39 is inserted into the small-diameter hole 35b of the connecting member 35 in a manner that allows it to move freely up and down.

[0041] Furthermore, the valve body 12 is fixed at the connection opening 12c by sequentially screwing in the lower spring support member 40 and the connecting member 35. However, the lower spring support member 40, which is fixed to the upper part of the valve chamber 13, has a stepped through hole at its center, through which the valve core base 17b can slide up and down, and a compression coil spring 41 is installed. A compression coil spring 41 is located between the stepped portion above the through hole and the upper spring support member 39. This compression coil spring 41 applies force upwards (in the valve opening direction) to the valve core 17. During valve opening operation, in addition to the driving force of the motor 21, the force of the coil spring 41 applied to the valve core 17 further ensures a reliable valve opening operation.

[0042] In addition, the central axis A of the valve body 12, inlet hole 14, valve seat 16, valve core 17 and ball joint 38, as well as the central axis (rotation axis) A of the threaded drive component 33, output shaft 31 and rotor 23, are consistent with each other.

[0043] The operation of the electric valve 11 involved in this embodiment is as follows.

[0044] When from Figure 1 When the valve is closed, current is supplied to the stator 22 (coil 26) to rotate the rotor 23 in one direction. After the rotation of the rotor 23 is reduced by the reduction mechanism 30, it is converted into linear motion by the threaded feed mechanism 34, and the threaded drive component 33 is lifted upward. Simultaneously, by the force of the compressed coil spring 41, the valve core 17 (valve core base 17b), which is pressed against the lower surface of the threaded drive component 33 via the upper spring support component 39 and the ball joint 38, is lifted upward. The valve core 17 (valve core body 17a) leaves the valve seat 16, and the refrigerant flowing in through the inflow path 52 and inflow hole 14 flows out through the valve chamber 13 and outflow hole 15 from the outflow path 53 in the open valve state (see reference). Figure 2 (arrow F). Furthermore, the amount of refrigerant passing through in this open valve state (refrigerant flow rate) can be adjusted by the amount of rotation of rotor 23 (the distance between valve seat 16 and valve core 17).

[0045] Furthermore, in the aforementioned open valve state, foreign matter contained in the flowing refrigerant is captured by the filter 19 provided at the bottom 12a of the valve body, preventing foreign matter from entering the valve (inflow hole 14, valve chamber 13). Moreover, since the support portion 19b of the filter 19 is disposed on the outer peripheral surface of the bottom 12a of the valve body (i.e., outside the flow path), the flow of refrigerant is not disturbed by the support portion 19b. In addition, since the filter 19 is disposed near the valve seat 16, air bubbles contained in the refrigerant flowing from upstream can be broken up by the filter 19, thus preventing large air bubbles from bursting and generating abnormal noise when passing between the valve seat 16 and the valve core 17, thereby also making the electric valve 11 quieter.

[0046] On the other hand, when current is supplied to the stator 22 (coil 26) from the open valve state to cause the rotor 23 to rotate in the opposite direction, the rotation of the rotor 23 is converted into linear motion by the threaded feed mechanism 34, and the threaded drive component 33 moves downward. Accompanying this downward movement, the valve core 17 moves downward, and when the valve core 17 (valve core body 17a) abuts against the valve seat 16, the flow path between the inlet hole 14 and the outlet hole 15 is cut off, resulting in a closed valve state (see reference). Figure 1 ).

[0047] In addition, in the electric valve 11 of this embodiment, as described above, the filter 19 prevents foreign objects from entering the valve. Therefore, when the valve is closed, the foreign objects are bitten between the valve core 17 and the valve seat 16, which can prevent the valve core 17 and the valve seat 16 from being damaged and causing valve leakage.

[0048] (Second Implementation)

[0049] Reference Figure 3 The electric valve according to the second embodiment of the present invention will be described.

[0050] like Figure 3 As shown, the electric valve 61 of this embodiment has the same structure as the first embodiment, including a filter 19. The filter 19 has a mesh-shaped filter body 19c and an annular support 19b. However, the filter body 19c is different from that of the first embodiment, having a downwardly protruding hemispherical shape.

[0051] In addition, the filter 19 is fixed to the inner side of the bottom 12a of the valve body. Therefore, instead of forming a stepped portion 12b on the outer peripheral surface of the bottom 12a of the valve body as in the first embodiment, an enlarged diameter portion 12d with an enlarged inner diameter is formed at the lower end of the inlet hole 14, and the filter 19 is fixed to the bottom 12a of the valve body by inserting the support portion 19b into the enlarged diameter portion 12d.

[0052] Since the parts of the filter 19 and valve body bottom 12a, other than their shapes, are the same as those of the electric valve 11 in the first embodiment, the same symbols are used to mark the same or equivalent structures as those of the electric valve 11 in the first embodiment, and repeated descriptions are omitted.

[0053] The embodiments of the present invention have been described above, but the present invention is not limited to these contents. Various modifications can be made within the scope of the patent claims, which will be obvious to those skilled in the art.

[0054] For example, in the embodiments described above, in the open state, the refrigerant flows into the valve chamber 13 sequentially through the inflow path (first flow path) 52 and the inflow hole (first flow path hole) 14, and flows out through the outflow hole (second flow path hole) 15 from the outflow path (second flow path) 53. However, the refrigerant can also flow into the valve chamber 13 sequentially through the outflow path (second flow path) 53 and the outflow hole (second flow path hole) 15, and flow out through the inflow hole (first flow path hole) 14 from the inflow path (first flow path) 52. In this case, it is desirable for the support portion 19b to be more securely fixed relative to the valve body 12.

[0055] Furthermore, the filter (filter body) described in this invention can also be a plate-shaped filter, i.e., a filter made of perforated metal with fine holes in a plate. Moreover, in the above embodiments, an electric valve was described that converts the rotation of the rotor, after being reduced in speed by a reduction mechanism, into linear motion and transmits it to the valve core via a threaded feed mechanism. However, this invention can also be applied to direct-acting electric valves that do not have a reduction mechanism. Furthermore, a direct-acting electric valve refers to, for example, an electric valve that converts the rotation of the rotor into linear motion and transmits it to the valve core via a threaded feed mechanism without a reduction mechanism.

[0056] Symbol Explanation

[0057] A central axis

[0058] F Refrigerant Flow

[0059] 11, 61 electric valve

[0060] 12 valve body

[0061] 12a valve body bottom

[0062] 12b Step Section

[0063] 12c connection opening

[0064] 12d diameter expansion section

[0065] 13 valve chambers

[0066] 14 Inlet Ports (First Flow Path Ports)

[0067] 15 Outlet Hole (Through Hole) (Second Flow Path Hole)

[0068] 16 valve seat

[0069] 17 valve core

[0070] 17a Valve Core Body

[0071] 17b valve core base

[0072] 18 seals

[0073] 19 filters

[0074] 19a, 19c filter body

[0075] 19b Support section

[0076] 21 Electric motor (stepper motor)

[0077] 22 stator

[0078] 23 rotors

[0079] 24 magnetic yoke

[0080] 25 winding tube

[0081] 26 coils

[0082] 27 Resin Molded Cover

[0083] 28 casing

[0084] 29 base plate

[0085] 30. Reduction Mechanism (Exotic Planetary Gear Mechanism)

[0086] 31 output shaft

[0087] 31a Fitting Groove

[0088] 32 bearing components

[0089] 32a socket

[0090] 32b internal thread section

[0091] 33 thread drive component

[0092] 33a plate-shaped part

[0093] 33b External Thread Section

[0094] 34. Transmission Mechanism (Thread Feed Mechanism)

[0095] 35 connecting parts

[0096] 35a large diameter hole

[0097] 35b small diameter hole

[0098] 36 balls

[0099] 37-ball bearing

[0100] 38 ball joint

[0101] 39 Upper Spring Support Component

[0102] 39a Fitting Hole (Lower Surface Fitting Hole)

[0103] 39b Fitting Hole (Upper Surface Fitting Hole)

[0104] 40 Lower side spring support component

[0105] 41 Compression coil spring

[0106] 51 housing

[0107] 51a valve mounting hole

[0108] 52 inflow path (first flow path)

[0109] 53 outflow path (second flow path).

Claims

1. An electric valve, comprising: The valve body has a valve chamber inside and a first flow path hole communicating with the valve chamber at the bottom, and the valve body has a second flow path hole communicating with the valve chamber. A valve core, configured to move forward and backward relative to a valve seat, the valve seat being formed at the valve chamber side end of the first flow path orifice; The rotor, which is a component of the electric motor that drives the valve core; and A transmission mechanism that converts the rotation of the rotor into linear motion and transmits it to the valve core. Its features are, The electric valve also includes a filter, which has a mesh filter body that allows fluid to pass through and a support that supports the filter body. The support portion is fixed to the valve body in such a way that the fluid passing through the first flow path hole passes through the filter body portion.

2. The electric valve according to claim 1, characterized in that, The support portion is fixed to the bottom of the valve body, which has the first flow path hole formed thereon.

3. The electric valve according to claim 2, characterized in that, The support portion is fixed to the outer peripheral surface of the bottom of the valve body in such a way that it covers the bottom of the valve body.

4. The electric valve according to any one of claims 1 to 3, wherein the electric valve can be installed in the housing by inserting into a valve mounting hole in the housing, the housing having the valve mounting hole, a first flow path opening on the bottom surface of the valve mounting hole, and a second flow path opening on the inner circumferential surface of the valve mounting hole. Its features are, The second flow path orifice opens on the outer peripheral surface of the valve body. When the valve body is inserted into the valve mounting hole, the first flow path hole is connected to the first flow path, and the second flow path hole is connected to the second flow path.

5. The electric valve according to claim 4, characterized in that, The filter body is configured to protrude into the first flow path when the valve body is inserted into the valve mounting hole.

Images