Solenoid valve

Abstract

A solenoid valve (100) is provided with: a solenoid (70) around which a coil (70a) is wound; a suction member (80) disposed on the inner side of the solenoid; a plunger (50) that is attracted by the attractor by energizing the solenoid and that is connected to a valve shaft (valve body) (60); a tube (51) that is provided inside the solenoid and that accommodates the plunger; and a housing (70c) having a first support portion (91) disposed so as to overlap one end of the solenoid in the axial direction and a second support portion (92) disposed so as to overlap the other end of the solenoid in the axial direction, the first support portion and the second support portion being formed with a first mounting hole (91a) and a second mounting hole (92a) into which a pipe is fitted, respectively. The first mounting hole is in contact with one side in the radial direction of the outer periphery of the tube.

Description

Technical Field

[0001] The present invention relates to a solenoid valve. Background Art

[0002] Japanese Patent Application Publication No. 2014-152848 discloses a solenoid valve with a differential pressure valve for use in heat pump cycles. This solenoid valve has the following structure: when the solenoid is de-energized, the main valve seat is opened. When the solenoid is energized (turned on), the movable iron core is attracted by the fixed iron core, causing the plunger to descend, closing the main valve seat via the main valve core.

[0003] Technical problem to be solved by the invention

[0004] PWM (Pulse Width Modulation) control is sometimes used to control solenoid valves for energy conservation. PWM control, also known as duty cycle control, controls the power applied to the load by maintaining a fixed square wave frequency and varying the proportion of time the voltage remains high (duty cycle).

[0005] However, in the case of PWM control, even when the valve is on, it actually maintains the closed state while repeatedly switching on and off at a high speed. Since the movable iron core produces sound when it adheres to the fixed iron core, this repeated high-speed movement of the movable iron core adhering to and separating from the fixed iron core is a major cause of noise and vibration. Summary of the Invention

[0006] An object of the present invention is to suppress the generation of noise and vibration in a solenoid valve.

[0007] Technical solutions to technical problems

[0008] The electromagnetic valve according to the first aspect includes: a solenoid having a coil wound therearound; and an attracting member disposed inside the solenoid.

[0009] A plunger connected to the valve core and attracted by the attraction member when the solenoid is energized; a tube arranged on the inner side of the solenoid and accommodating the plunger; and a shell having a first support portion arranged to overlap with one axial end of the solenoid and a second support portion arranged to overlap with the other axial end of the solenoid, wherein a first mounting hole and a second mounting hole for embedding the tube are formed in the first support portion and the second support portion, respectively, and the first mounting hole abuts against one radial side of the outer periphery of the tube.

[0010] In this solenoid valve, the housing has a first mounting hole and a second mounting hole, each of which accommodates the plunger tube. The first mounting hole abuts one radial side of the tube's outer circumference. In other words, the tube is radially constrained by the housing. This prevents tube vibration even when the plunger rapidly approaches or withdraws from the attractor during PWM control of the solenoid.

[0011] In a second aspect, in the solenoid valve according to the first aspect, the first mounting hole and the second mounting hole have the same diameter, and the center of the first mounting hole and the center of the second mounting hole are offset in the radial direction of the pipe.

[0012] In this solenoid valve, the centers of the first and second mounting holes, which have the same diameter, are offset radially from each other. Therefore, when the tube is inserted into the first and second mounting holes, one radial side of the tube's outer circumference abuts the first mounting hole. This simple structure suppresses tube vibration.

[0013] In a third aspect, in the solenoid valve according to the first aspect or the second aspect, the first mounting hole and the second mounting hole have the same diameter.

[0014] A fourth aspect is the solenoid valve according to any one of the first to third aspects, wherein the housing includes a plate-shaped connecting portion connecting the first support portion and the second support portion, and the first mounting hole abuts against the outer periphery of the pipe on one side in a direction parallel to the connecting portion.

[0015] A fifth aspect is the solenoid valve according to any one of the first to fourth aspects, wherein the second mounting hole is in contact with the other radial side of the outer circumference of the pipe.

[0016] As a result, the pipe is further constrained by the casing in the radial direction, and thus vibration of the pipe can be further suppressed.

[0017] Effects of the Invention

[0018] According to the present invention, the generation of noise and vibration in the solenoid valve can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view showing an expansion valve including a solenoid valve according to this embodiment.

[0020] Figure 2 It is an enlarged cross-sectional view showing the solenoid valve according to the present embodiment.

[0021] Figure 3 It is a perspective view showing a partial structure of the solenoid valve according to the present embodiment.

[0022] Figure 4 It is a perspective view showing the casing.

[0023] Figure 5 It is a top view showing the casing. DETAILED DESCRIPTION

[0024] Below, the mode for implementing the present invention is described based on the accompanying drawings. The constituent elements represented by the same symbols in each drawing mean that they are the same or identical constituent elements. In addition, the descriptions and symbols repeated in the embodiments described below are sometimes omitted. In addition, the drawings used in the following description are all schematic figures, and the relationship between the sizes of the elements shown in the drawings, the ratio of the elements, etc. are not necessarily consistent with the actual ones. In addition, even between multiple drawings, the relationship between the sizes of the elements, the ratio of the elements, etc. are not necessarily consistent.

[0025] (Solenoid Valve)

[0026] exist Figure 1 、 Figure 2 In the embodiment, the solenoid valve 100 according to the present invention is used by being attached to, for example, an expansion valve 200 of a refrigeration cycle of an automobile air conditioner.

[0027] The electromagnetic valve 100 includes a solenoid 70, an attracting member 80, a plunger 50, a tube 51, and a housing 70c. The solenoid 70 is a component that is wound with a coil 70a and generates magnetic force when energized. The coil 70a is provided with a connection terminal 72 ( Figure 3 The attractor 80 is a magnetic body located inside the solenoid 70, such as a movable iron core. The plunger 50 is connected to the valve shaft 60, an example of a valve core, and is attracted to the attractor 80 when the solenoid 70 is energized. The tube 51 is a bottomed member located inside the solenoid 70 and housing the plunger 50.

[0028] exist Figure 2 In the expansion valve 200, the solenoid valve 100 controls the flow of fluid between the inlet (not shown) and the outlet 32 by opening and closing the main valve portion 10. The inlet and the outlet 32 are formed in the valve body 30 as the valve body, and a main valve chamber 33 is provided between the inlet and the outlet 32. The main valve chamber 33 is connected to the inlet. In the main valve chamber 33, as described later, a valve is provided to be able to move in the axial direction ( Figure 2 The main valve element 40 is housed in a sliding manner. The valve body 30 is made of a metal member such as aluminum, aluminum alloy or brass.

[0029] The main valve core 40 includes a main valve member 43 and a main valve gasket 41. The main valve member 43 is made of a metal material such as aluminum, stainless steel, or brass. The main valve core 40 is supported inside the main valve chamber 33 of the valve body 30 in an axially slidable manner. Figure 2 The main valve portion 10 is disposed below the main valve core 40, i.e., on one side in the sliding direction. The main valve portion 10 comprises the main valve core 40 and a main valve seat 35 formed between the inlet and outlet 32 of the valve body 30. In this embodiment, a gasket portion is provided on the lower surface of the main valve gasket 41 of the main valve core 40 to open and close the main valve seat 35.

[0030] The pilot valve portion 20 is configured on the other side (the upper side in the illustrated embodiment) of the main valve element 40 in the sliding direction. In this embodiment, a pilot valve seat 42 is provided on the upper surface of the main valve gasket 41. The pilot valve seat 42 is opened and closed by the pilot valve portion 20 formed at the top end (the top end opposite the head portion 62).

[0031] In addition, in this embodiment, as long as the pilot valve seat 42 can be closed, Figure 2 The pilot valve gasket, which is the portion where the pilot valve seat 42 on the upper surface side is provided, is not essential, and a structure may be adopted in which the pilot valve seat portion is directly formed on the main valve member 43, and the gasket portion on the lower surface side is attached to the main valve member 43. Of course, the gasket portion that opens and closes the main valve seat 35 on the lower surface side and the portion where the pilot valve seat 42 on the upper surface side is provided (pilot valve gasket) may be attached to the main valve member 43 as separate components.

[0032] A pilot passage 45 extending in the axial direction is formed in the vertical center of the main valve body 40. Figure 2 A pilot valve seat 42 is provided at the upper end of the pilot passage 45 in the valve body.

[0033] The cylindrical main valve member 43 is fitted onto the outer surface of the main valve gasket 41. A pilot passage 45 is formed in the main valve gasket 41. Furthermore, a pressure equalizing hole (not shown) is formed in the main valve core 40, which is a through-hole extending in the axial direction. The pressure equalizing hole connects the main valve chamber 33 with the pilot valve chamber 34. The pressure equalizing hole equalizes the pressure in the main valve chamber 33 and the pilot valve chamber 34, making it easier to open and close the main valve core 40.

[0034] A tube 51 that opens downward is disposed in the center of the upper portion of the solenoid valve 100. The tube 51 is a cylindrical component having a top and a side wall. The end of the side wall of the tube 51 opposite to the top is attached to the suction member 80. Specifically, Figure 2 The lower end of the tube 51 in the pipe is open and can be fixed to the suction member 80 described later by appropriate methods such as caulking or welding. The plunger 50 is accommodated inside the pipe 51.

[0035] The plunger 50 is a cylindrical component having a bottom 50a and a sidewall 50b. The bottom 50a of the plunger 50 is located on the side of the pilot valve seat 42. A through-hole 50c is formed in the bottom 50a. The plunger 50 in this embodiment is made of, for example, magnetic stainless steel. The plunger material is not limited to stainless steel, but can be a magnetic material. The plunger 50 is arranged to slide freely in the axial direction inside the tube 51 by the operation of the solenoid 70.

[0036] The pilot valve seat 42 is opened and closed by the valve shaft 60. The valve shaft 60 has a head portion 62 and a shaft portion 63. The pilot valve portion 20 is provided at the top end portion of the shaft portion 63 (the top end portion on the opposite side from the head portion 62). The head portion 62 of the valve shaft 60 is arranged on the inner side of the plunger 50. In the radial direction of the valve shaft 60, the head portion 62 is larger in diameter than the shaft portion 63. In addition, the diameter of the shaft portion 63 is slightly smaller than the diameter of the through hole 50c of the plunger 50. Therefore, when the shaft portion 63 is inserted into the through hole 50c of the plunger 50, it protrudes from the bottom portion 50a on the outside of the plunger 50 toward the valve seat.

[0037] A spring 44 is provided between the top of the tube 51 and the head 62 of the valve shaft 60. The valve shaft 60 is pressed against the plunger 50 by the elastic force of the spring 44 provided in the tube 51, for example. As a result, the plunger 50 slides up and down in the tube 51 together with the valve shaft 60 due to the operation of the solenoid 70.

[0038] As a method of driving the plunger 50 by the operation of the solenoid 70, an attracting member 80 is provided. The attracting member 80 is, for example, a magnetic material. When the solenoid 70 is energized by an appropriate control unit (not shown), a magnetic field is generated, which overcomes the elastic force of the spring 52 and attracts the magnetic plunger 50 downward.

[0039] The suction member 80 as a whole is in the shape of a cylinder with multiple sections having through holes formed in the upper and lower parts, and the tube 51 is installed in the suction member 80. In this state, the suction member 80 is inserted or screwed into the upper large-diameter hole portion 30a formed in the valve body 30. Thereafter, the external thread member 71 is inserted into the through hole formed in the extension portion 70d of the solenoid 70 inserted into the outer periphery of the tube 51, and the external thread member 71 is screwed into the internal thread formed in the valve body 30, thereby pressing and fixing the suction member 80 to the valve body 30. The cylindrical shape of the suction member 80 is roughly composed of a small-diameter portion 81 at the top and a large-diameter portion 82 at the bottom. The lower open end of the tube 51 is fixed to the small-diameter portion 81, and the large-diameter portion 82 is fixed to the valve body 30 as described above. The plunger 50 is accommodated in the tube 51 fixed to the small-diameter portion 81 in a manner that allows it to slide up and down.

[0040] A cylindrical main valve core housing portion (space) 82a is formed inside the large-diameter portion 82 of the suction member 80. The main valve core 40 is housed in this main valve core housing portion 82a so that it can slide up and down. The main valve core 40 is lifted upward within the main valve chamber 33 by the elastic force of the main valve core spring 46. This space is divided into upper and lower parts by the main valve core 40, with the lower portion of the space being designated as the main valve chamber 33 and the upper portion being designated as the pilot valve chamber 34. The large-diameter portion 82 of the suction member 80 and the valve body 30 are appropriately sealed by an O-ring 83.

[0041] In the example shown in the figure, the small diameter portion 81 and the large diameter portion 82 of the suction member 80 are formed as a cylindrical member via steps to form an integral structure. Of course, depending on the embodiment, the small diameter portion 81 and the large diameter portion 82 can also be formed by different components, and the two can be fixed by an appropriate method (not shown). In short, as long as the suction member 80 can attract and drive the plunger 50 by energizing the solenoid 70. In this embodiment, the component that attracts and drives the plunger 50 and accommodates the main valve core 40 as a component that can slide up and down is called a suction member. It does not matter whether the suction member 80 is composed of one component or a plurality of components.

[0042] The solenoid 70 is fitted onto the outer circumference of the tube 51. It comprises a coil 70a, a bobbin 70b, and a housing 70c. The coil 70a is wound around the bobbin 70b. The housing 70c is made of a magnetic material and surrounds the bobbin 70b. Furthermore, on the lower side of the housing 70c (in the figure), that is, on the valve body 30 side of the housing 70c, on the side opposite the tube 51, an extension portion 70d is formed that extends outward from the coil 70a.

[0043] exist Figures 2 to 5 In the embodiment, housing 70c includes a first support portion 91 that overlaps one axial end of solenoid 70 and a second support portion 92 that overlaps the other axial end of solenoid 70, and surrounds coil 70a. Housing 70c is formed into, for example, a U-shape by first support portion 91, second support portion 92, and connecting portion 93 that connects first support portion 91 and second support portion 92.

[0044] The first support portion 91 and the second support portion 92 are formed with a first mounting hole 91a and a second mounting hole 92a for inserting the tube 51, respectively. The first support portion 91 is also formed with a notch 91b for suppressing interference with the connection terminal 72. The second support portion 92 is also provided with two extensions 70d. Each of the extensions 70d is formed with a through hole 70e. The external screw 71 ( Figure 2 ) In addition, the second support portion 92 is provided with two protrusions 70f for positioning the coil 70a.

[0045] The first mounting hole 91a abuts one radial side of the outer circumference of the tube 51. The second mounting hole 92a abuts the other radial side of the outer circumference of the tube 51. As an example, the first mounting hole 91a and the second mounting hole 92a are circular with the same diameter, and the center C1 of the first mounting hole 91a and the center C2 of the second mounting hole 92a are offset in the radial direction of the tube 51. Figure 2 In the embodiment, the center C1 of the first mounting hole 91a is offset to the left of the center C2 of the second mounting hole 92a. Consequently, the outer periphery of the upper right portion of the tube 51 abuts the first mounting hole 91a, while the outer periphery of the lower left portion of the tube 51 abuts the second mounting hole 92a. The circumferential position of the tube 51 abuts the first mounting hole 91a and the second mounting hole 92a is determined by the relative positional relationship (offset pattern) between the first and second mounting holes 91a, 92a.

[0046] In the above description, the state in which the second mounting hole 92a abuts against the other radial side of the outer periphery of the tube 51 includes the following: Figure 2 In this way, the second mounting hole 92a is in contact with the suction member 80. Of course, the tube 51 may be extended downward to surround the outer peripheral portion of the suction member 80. In this case, the second mounting hole 92a is in contact with the tube 51.

[0047] In addition, since the second support portion 92 having the second mounting hole 92a is fixed to the valve body 30 using an external threaded member 71, etc., it is also possible that the first mounting hole 91a abuts one radial side of the outer periphery of the tube 51 and the second mounting hole 92a does not abut the other radial side of the outer periphery of the tube 51.

[0048] If the diameters of the first and second mounting holes 91a, 92a are identical, the offset should be 3 to 9% of the hole diameter. If the offset is below this range, the tube 51 will not be adequately restrained by the housing 70c, making it difficult to suppress vibration. If the offset exceeds this range, fitting the tube 51 into the first and second mounting holes 91a, 92a becomes difficult.

[0049] (Expansion Valve)

[0050] exist Figure 1 In this configuration, the solenoid valve 100 is mounted on the expansion valve 200. The structure of the expansion valve 200 is general, so its description will be brief. The expansion valve 200 includes a valve body 30. A first passage 11 for refrigerant flowing from the condenser and receiver to the evaporator of the refrigeration cycle, and a second passage 12 for refrigerant flowing from the evaporator to the compressor are formed in the valve body 30, separated into upper and lower parts. The solenoid valve 100 is mounted so that it can open and close between an inlet and an outlet 32 in the first passage 11.

[0051] Furthermore, the valve body 30 is provided with an orifice 32a and a valve chamber 28 provided in the first passage 11; a spherical valve element 32b located upstream of the outflow port 32 to control the amount of refrigerant passing through the orifice 32a; and an adjustment screw 39 with a spring 32d that presses the valve element 32b toward the orifice 32a via a valve member 32c. An O-ring 39a is attached to the adjustment screw 39 to ensure airtightness with the valve body 30. The adjustment screw 39 and the pressure spring 32d are used to adjust the opening of the valve element 32b relative to the orifice 32a.

[0052] The inlet of the first passage 11 communicates with the main valve portion 10 and communicates with the valve chamber 28 via the passage 26 when the solenoid valve 100 is open. The valve body 30 has bolt holes 30b formed therein for mounting the expansion valve 200 at the installation position.

[0053] In valve body 30, a small-diameter hole 37 and a large-diameter hole 38 (larger in diameter than hole 37) are formed coaxially with orifice 32a, extending through second passage 12, to apply a driving force to valve element 32b based on the evaporator outlet temperature, thereby opening and closing orifice 32a. A power element 36, serving as a heat-sensing portion, is fixed to the upper end of valve body 30.

[0054] The power element 36 includes a temperature-sensing rod 36f, which slides within the large-diameter hole 38 and the small-diameter hole 37 in response to the displacement of the diaphragm 36a, exerting a driving force. The top of the temperature-sensing rod 36f abuts the lower surface of the diaphragm 36a, while the lower end of the temperature-sensing rod 36f abuts the valve core 32b. The temperature-sensing rod 36f serves as the valve core driving rod. Alternatively, the valve core driving rod may be composed of multiple temperature-sensing rods arranged in series.

[0055] (effect)

[0056] This embodiment is configured as described above, and its operation will be described below. Here, a case where the solenoid valve 100 is applied to the expansion valve 200 of a refrigeration cycle is taken as an example. Figure 2 This indicates a state where the solenoid 70 (coil 70a) is not energized. In this state, since there is no attractive force generated by the attractor 80, the spring 52 forces the plunger 50 upward within the tube 51, opening the pilot valve 20. Furthermore, the main valve element 40 is lifted upward within the main valve chamber 33 by the spring 46, opening the main valve 10.

[0057] In this state, if the compressor (not shown) is operated, the refrigerant flows from the inlet (not shown) through the main valve portion 10 opened in the main valve chamber 33 and through the outlet 32 ( Figure 1) flows. In addition, the amount of refrigerant flowing from the pilot valve chamber 34 to the main valve chamber 33 via the pilot passage 45 is greater than the amount of refrigerant flowing from the main valve chamber 33 to the pilot valve chamber 34 via the pressure equalizing hole (not shown). Therefore, the pressure in the pilot valve chamber 34 is lower than the pressure in the main valve chamber 33, and an upward force is generated on the main valve core 40. The main valve portion 10 and the elastic force of the main valve core spring 46 maintain a fully open state, maintaining the flow from the inlet to the outlet 32.

[0058] Next, when the solenoid 70 is energized, a magnetic field is generated, creating an electromagnetic attraction between the attractor 80 and the plunger 50, pulling the plunger 50 downward against the elastic force of the spring 52. The valve shaft 60 slides up and down within the tube 51, moving in the same manner as the plunger 50. Thus, the attractive force of the attractor 80 pulls the plunger 50 downward, and at the same time, the elastic force of the spring 44 causes the valve shaft 60 to slide downward. As a result, the pilot valve portion 61 at the lower end of the valve shaft 60 abuts against the pilot valve seat 42 formed above the main valve core 40, closing the pilot valve portion 20. In other words, the pilot passage 45 is sealed.

[0059] When the pilot passage 45 is closed, the only passage connecting the pilot valve chamber 34 and the main valve chamber 33 is the pressure-equalizing hole (not shown), eliminating the pressure difference between the two valve chambers. Furthermore, when the spring 44 pushes the main valve core 40 downward, causing it to slide to its lowest point, the main valve core 40 abuts against the main valve seat 35, closing the main valve portion 10. This also closes the main valve portion 10, closing the flow path and preventing the flow of refrigerant, etc., from the inlet to the outlet 32.

[0060] When the solenoid 70 is no longer energized, the electromagnetic attraction of the solenoid 70 to the attraction member 80 disappears, the plunger 50 is pushed upward by the elastic force of the spring 52, and the valve shaft 60 and the plunger 50 move upward together against the elastic force of the spring 44, so that the pilot valve portion 61 of the valve shaft leaves the pilot valve seat 42 provided on the upper surface side of the main valve core 40, and the pilot valve portion 20 becomes open.

[0061] As a result, the pilot valve chamber 34 communicates with the outflow port 32 via the pilot passage 45 provided in the center portion of the main valve element 40 , and the pressure in the pilot valve chamber 34 changes from high pressure to low pressure.

[0062] As a result, the main valve element 40 moves upward, and the main valve element 40 separates from the main valve seat 35 to enter the valve open state. In addition to the operation of the solenoid valve 100, the expansion valve 200 controls the flow of the refrigerant and the like.

[0063] In the solenoid valve 100 of this embodiment, the housing 70c includes a first mounting hole 91a and a second mounting hole 92a, each of which accommodates the tube 51 of the plunger 50. The first mounting hole 91a abuts one radial side of the outer circumference of the tube 51, while the second mounting hole 92a abuts the other radial side of the outer circumference of the tube 51. In other words, the tube 51 is radially constrained by the housing 70c. This prevents vibration of the tube 51 even when the plunger 50 is rapidly approaching or withdrawing from the attractor 80 during PWM control of the solenoid 70.

[0064] Furthermore, because the centers C1 and C2 of the first and second mounting holes 91a, 92a, which have the same diameter, are offset in the radial direction of the tube 51, when the tube 51 is inserted into the first and second mounting holes 91a, one radial side of the outer circumference of the tube 51 abuts the first mounting hole 91a, while the other radial side of the outer circumference of the tube 51 abuts the second mounting hole 92a. This simple structure suppresses vibration of the tube 51.

[0065] This can suppress the generation of noise and vibration in the solenoid valve 100. In addition, the opening and closing of the expansion valve 200 can be controlled by the solenoid valve 100. Therefore, an improved solenoid valve is provided.

[0066] [Other embodiments]

[0067] An example of an embodiment of the present invention has been described above, but the embodiment of the present invention is not limited to the above-described content, and it is apparent that various modifications other than the above-described content can be made without departing from the spirit and scope of the present invention.

[0068] While the first mounting hole 91a and the second mounting hole 92a are circular with the same diameter, the shape is not limited to a circular shape. Any structure is sufficient as long as the tube 51 is constrained by the housing 70c by alternatingly abutting the inner circumferences of the first mounting hole 91a and the second mounting hole 92a. Furthermore, the top portion of the tube 51 may be formed from a separate component. In other words, the tube 51 may be formed by combining a cylindrical portion and a top portion.

[0069] The disclosure of Japanese Patent Application No. 2023-7640 filed on January 20, 2023 is incorporated herein by reference in its entirety.

[0070] All documents, patent applications, and technical standards described in this specification are incorporated herein by reference to the same extent as if each document, patent application, and technical standard were specifically and individually described as being incorporated by reference.

Claims

1. A solenoid valve having: a solenoid wound with a coil; an attracting member disposed inside the solenoid; a plunger connected to the valve core and attracted by the attracting member when the solenoid is energized; a tube disposed inside the solenoid and housing the plunger; as well as A housing having a first support portion configured to overlap with one axial end of the solenoid and a second support portion configured to overlap with the other axial end of the solenoid, wherein a first mounting hole and a second mounting hole for embedding the tube are formed in the first support portion and the second support portion, respectively, and the first mounting hole abuts against one radial side of the outer periphery of the tube.

2. The solenoid valve according to claim 1, wherein: The center of the first mounting hole and the center of the second mounting hole are staggered in the radial direction of the tube.

3. The solenoid valve according to claim 1 or 2, wherein: The diameters of the first mounting hole and the second mounting hole are the same as each other.

4. The solenoid valve according to claim 1, wherein: The housing includes a plate-shaped connecting portion connecting the first supporting portion and the second supporting portion. The first mounting hole abuts against the outer periphery of the pipe on one side in a direction parallel to the connecting portion.

5. The solenoid valve according to claim 1, wherein The second mounting hole abuts against the other radial side of the outer circumference of the pipe.

Images