Expansion valve and vibration control spring

Abstract

To provide a technology which enables improvement of design flexibility of vibration control springs.SOLUTION: An expansion valve 10 includes vibration control springs 80, 90 which slidably contact with a vibration controlled object which is at least one of a valve body 62 and a displacement part which is displaced with the valve body 62. The vibration control springs 80, 90 include: a based part 82, 92 attached to an inner peripheral surface of an arrangement part; and a vibration control part 83, 93 extending from the base part 82, 92. The vibration control part 83, 93 includes a slide contact part 85, 95 which slidably contacts with the vibration controlled object to bias the vibration controlled object. When viewed in a displacement direction, at least a part of one end at the base part 82, 92 side of the vibration control part 83, 93, at least a part of a portion from the one end to the slide contact part 85, 95 in the vibration control part 83, 93, at least a part of the slide contact part 85, 95, and the vibration controlled object are arranged in order of at least the part of the one end, at least the part of the portion from the one end to the slide contact part 85, 95, at least the part of the slide contact part 85, 95, and the vibration controlled object in a direction from the one end to the vibration controlled object.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to an expansion valve and an anti-vibration spring. [Background technology]

[0002] For example, Patent Document 1 discloses an expansion valve comprising a valve body having an inlet hole through which refrigerant flows into a valve chamber and a valve hole through which the refrigerant flows out of the valve chamber, a valve disc that adjusts the amount of refrigerant flowing through the valve hole, a power element attached to the valve body and driving the valve disc via a valve stem, a first vibration-damping spring that is provided in the valve chamber and prevents vibration of the valve disc, and a second vibration-damping spring that abuts against the valve stem and prevents vibration of the valve disc. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-025332 A Summary of the Invention [Problem to be solved by the invention]

[0004] The first vibration-proof spring described in Patent Document 1 is attached to a support member that moves in the axial direction, so there is a limit to the length of the legs. Also, the second vibration-proof spring described in Patent Document 1 is formed by cutting and raising an elastic piece, so there is a limit to the number of legs. Thus, the technology described in Patent Document 1 has a small degree of freedom in designing the vibration-proof spring.

[0005] The present disclosure aims to provide a technique that improves the freedom in designing anti-vibration springs. [Means for solving the problem]

[0006] The expansion valve of the first aspect includes a valve body having a valve chamber and a valve seat, a valve element arranged in the valve chamber and moving toward and away from the valve seat, an actuation rod that transmits a driving force to the valve element, a vibration-proof spring that is in sliding contact with a vibration-proof object that is at least one of the valve element and a displacement part that displaces in a displacement direction together with the valve element, and a power element that is provided in the valve body and drives the valve element via the actuation rod, the valve body having an arrangement part that arranges the vibration-proof object inside, and the vibration-proof spring having a base part attached to an inner circumferential surface of the arrangement part and a vibration-proof part extending from the base part. and the vibration-damping part has a sliding part that slidably abuts against the vibration-damping object and biases the vibration-damping object, and when viewed in the displacement direction, at least a portion of one end of the base side of the vibration-damping part, at least a portion of the portion of the vibration-damping part from the one end to the sliding part, at least a portion of the sliding part, and the vibration-damping object are arranged in the following order in the direction from the one end to the vibration-damping object: at least a portion of the one end, at least a portion of the portion from the one end to the sliding part, at least a portion of the sliding part, and the vibration-damping object.

[0007] In this expansion valve, the anti-vibration spring has a base and an anti-vibration part, and the base of the anti-vibration spring is attached to the inner circumferential surface of the arrangement part in the valve body. The anti-vibration part of the anti-vibration spring has a sliding contact part that slidably contacts the anti-vibration object, which is at least one of the valve body and the displacement part that displaces in the displacement direction together with the valve body, and the sliding contact part biases the anti-vibration object to prevent vibration. In the expansion valve according to this aspect, the anti-vibration part extending from the base of the anti-vibration spring is arranged in the following order in the direction from one end to the anti-vibration object as viewed from the displacement direction: at least a part of the one end, at least a part of the portion from the one end to the sliding contact part, at least a part of the sliding contact part, and the anti-vibration object. For this reason, the length of the anti-vibration part is not limited by the length in the circumferential direction of the inner circumferential surface of the arrangement part to which the base is attached. As a result, in the expansion valve according to this aspect, the freedom of design of the anti-vibration spring can be improved.

[0008] The expansion valve of a second aspect is the vibration-proof spring of the first aspect, wherein the base portion is formed in a cylindrical shape, and a plurality of the vibration-proof portions are provided lined up in the circumferential direction of the base.

[0009] In this expansion valve, the base is formed in a cylindrical shape, and a plurality of vibration-isolating parts are arranged in a line in the circumferential direction of the base. Therefore, with this expansion valve, the length of the vibration-isolating spring in the displacement direction can be made shorter than in a configuration in which the vibration-isolating parts are arranged in a line in the displacement direction.

[0010] The expansion valve of the third aspect is an expansion valve described in the first or second aspect, wherein the arrangement portion faces the base portion in the displacement direction and has an abutted portion with which the base can abut, and the vibration-damping portion is positioned on the abutted portion side across the sliding portion, closer to the vibration-damping target than the opposite side of the abutted portion across the sliding portion.

[0011] According to this expansion valve, the base of the vibration-damping spring is capable of abutting against the abutted portion of the valve body, and the vibration-damping portion is located closer to the vibration-damping target than the opposite side of the abutted portion across the sliding contact portion. Therefore, according to this expansion valve, when the vibration-damping target is displaced toward the abutted portion, the vibration-damping target and the vibration-damping portion come into sliding contact with each other, widening the abutted portion side of the vibration-damping portion, and the vibration-damping spring receives a load toward the abutted portion. Also, when the vibration-damping target is displaced toward the side opposite the abutted portion, the vibration-damping portion narrows in the intersecting direction. As a result, the vibration-damping portion is lifted up by the vibration-damping target, and the portion of the base of the vibration-damping spring on the abutted portion side of the vibration-damping target abuts against the abutted portion. Therefore, with this type of expansion valve, the vibration-damping spring can be attached to the valve body without being fixed, compared to when the side of the abutted portion in the displacement direction of the vibration-damping portion is located closer to the positioning portion than the side opposite the abutted portion across the sliding contact portion.

[0012] An expansion valve of a fourth aspect is an expansion valve described in any one of the first to third aspects, wherein one of the inner circumferential surfaces of the base and the arrangement portion has a protrusion protruding toward the other of the inner circumferential surfaces of the base and the arrangement portion, and the other has a recess that engages with the protrusion.

[0013] According to this expansion valve, one of the inner circumferential surfaces of the base and the arrangement part of the anti-vibration spring has a protrusion that protrudes toward the other, and the other of the inner circumferential surfaces of the base and the arrangement part has a recess that engages with the protrusion. This allows the anti-vibration spring to be attached to the arrangement part. As a result, according to this expansion valve, the anti-vibration spring is less likely to come off the inner circumferential surface of the arrangement part compared to when one of the inner circumferential surfaces of the base and the arrangement part of the anti-vibration spring is flat.

[0014] An expansion valve of a fifth aspect is the expansion valve according to any one of the first to fourth aspects, wherein the displacement portion is the actuating rod, and the sliding contact portion is in sliding contact with the actuating rod.

[0015] According to this expansion valve, the vibration of the operating rod can be prevented by the vibration-isolating spring.

[0016] The expansion valve of a sixth aspect is an expansion valve described in any one of the first to fifth aspects, which has a support member that is arranged on the opposite side of the valve body from the valve seat and supports the valve body, the support member being the displacement portion, and the sliding portion being in sliding contact with the support member.

[0017] According to this expansion valve, the valve body can be vibration-proofed by the vibration-proof spring.

[0018] An expansion valve of a seventh aspect is the expansion valve according to any one of the first to sixth aspects, wherein the vibration-proof spring is harder than the valve body.

[0019] According to this expansion valve, an anti-vibration spring harder than the valve body is attached to the inner circumferential surface of the arrangement part. According to the expansion valve of this aspect, since the anti-vibration spring is attached to the inner circumferential surface of the arrangement part, the anti-vibration spring does not slide against the inner circumferential surface of the arrangement part, so that even if the anti-vibration spring is made of a material harder than the valve body, it is possible to prevent wear on the inner circumferential surface of the arrangement part. Or, even if the anti-vibration spring slides against the valve body when the valve body is driven, the degree of sliding can be reduced, so that wear on the inner circumferential surface of the arrangement part can be suppressed.

[0020] The eighth aspect of the vibration-damping spring comprises a base that is attached to the inner surface of the attachment object, and a vibration-damping part that extends from the base and has a sliding contact part that slidably contacts the vibration-damping object and biases the vibration-damping object, and when viewed in the displacement direction of the vibration-damping object, at least a portion of one end of the vibration-damping part on the base side, at least a portion of the portion of the vibration-damping part from the one end to the sliding contact part, at least a portion of the sliding contact part, and the vibration-damping object are arranged in the following order in the direction from the one end to the vibration-damping object: at least a portion of the one end, at least a portion of the portion from the one end to the sliding contact part, at least a portion of the sliding contact part, and the vibration-damping object.

[0021] This anti-vibration spring includes an anti-vibration part that slidably abuts against the object to be anti-vibration-damped and includes a sliding contact part that biases the object, and the base of the anti-vibration spring is attached to the inner circumferential surface of the object to be attached. In the anti-vibration spring according to this aspect, the anti-vibration part is arranged in the following order in the direction from one end toward the object to be anti-vibration-damped, when viewed from the displacement direction of the object to be anti-vibration-damped: at least a part of the one end, at least a part of the portion from the one end to the sliding contact part, at least a part of the sliding contact part, and the object to be anti-vibration-damped. Therefore, the length of the anti-vibration part is not limited by the circumferential length of the inner circumferential surface of the arrangement part to which the base is attached. This allows the anti-vibration spring according to this aspect to have improved design freedom. Effect of the Invention

[0022] The present disclosure provides a technique for improving the freedom of design of anti-vibration springs. [Brief description of the drawings]

[0023] [Figure 1] 4 is a diagram showing a state in which a valve body closes a valve seat in the expansion valve of the embodiment and the valve is closed. FIG. [Diagram 2] 1A and 1B are diagrams for explaining a method for manufacturing a vibration-proof spring in an expansion valve according to an embodiment, showing the state before bending processing is performed. [Diagram 3] 10A and 10B are diagrams for explaining a method for manufacturing an anti-vibration spring in an expansion valve according to an embodiment, and show the state after bending the legs. [Figure 4] 10A and 10B are diagrams for explaining a method for manufacturing an anti-vibration spring in an expansion valve according to an embodiment, and show the state in which the anti-vibration spring has been manufactured by bending the base portion. [Diagram 5] 1 is a diagram showing an embodiment of an expansion valve in a state where a valve body is separated from a valve seat and the valve is open. FIG. [Figure 6] 1 , and is an enlarged view showing the state of the main parts when the expansion valve is closed, where (A) is an enlarged view showing the state of the operating rod and the second vibration-damping spring, and (B) is an enlarged view showing the state of the valve body and the first vibration-damping spring. [Figure 7] 5, and is an enlarged view showing the state of the main parts when the expansion valve is open, where (A) is an enlarged view showing the state of the operating rod and the second vibration-damping spring, and (B) is an enlarged view showing the state of the valve body and the first vibration-damping spring. [Figure 8] 1A and 1B are diagrams showing a first modified example of the expansion valve of the present disclosure, in which (A) is an enlarged view showing the state of the actuating rod and the second vibration-damping spring, and (B) is an enlarged view showing the state of the valve body and the first vibration-damping spring. [Figure 9] 1A and 1B are diagrams showing a second modified example of the expansion valve of the present disclosure, in which (A) is an enlarged view showing the state of the actuating rod and the second vibration-damping spring, and (B) is an enlarged view showing the state of the valve body and the first vibration-damping spring. [Figure 10] 11A and 11B are diagrams showing a third modified example of the expansion valve of the present disclosure, in which (A) is an enlarged view showing the state of the actuating rod and the second vibration-damping spring, and (B) is an enlarged view showing the state of the valve body and the first vibration-damping spring. [Figure 11] 13A and 13B are diagrams showing a fourth modified example of the expansion valve of the present disclosure, in which (A) is an enlarged view showing the state of the actuating rod and the second vibration-damping spring, and (B) is an enlarged view showing the state of the valve body and the first vibration-damping spring. [Figure 12] 11A and 11B are diagrams showing a fifth modified example of the expansion valve of the present disclosure, in which (A) is an enlarged view showing the state of the actuating rod and the second vibration-damping spring, and (B) is an enlarged view showing the state of the valve body and the first vibration-damping spring. [Figure 13] 13A and 13B are diagrams showing a sixth modified example of the expansion valve of the present disclosure, in which (A) is an enlarged view showing the state of the actuating rod and the second vibration-damping spring, and (B) is an enlarged view showing the state of the valve body and the first vibration-damping spring. [Figure 14] FIG. 13 is a diagram showing a seventh modified example of the expansion valve of the present disclosure, and is an enlarged view showing the state of the actuating rod and the second vibration-proof spring. [Figure 15] 13 is a diagram for explaining a method for manufacturing an anti-vibration spring in a first modified example of the shape of the anti-vibration spring according to the present disclosure, showing the state before bending processing is performed. FIG. [Figure 16] 13 is a diagram illustrating a method for manufacturing an anti-vibration spring in a second modified example of the shape of the anti-vibration spring according to the present disclosure, and shows the state before bending processing is performed. FIG. [Figure 17] 13 is a diagram illustrating a method for manufacturing an anti-vibration spring in a third modified example of the shape of the anti-vibration spring according to the present disclosure, showing the state before bending processing is performed. FIG. [Figure 18] 11A and 11B are diagrams illustrating a method for manufacturing an anti-vibration spring in a fourth variant of the shape of the anti-vibration spring disclosed herein, in which (A) is a diagram showing the state before bending processing is performed, and (B) is a diagram showing the state after the anti-vibration spring has been manufactured by bending the legs, base, and protrusions. [Figure 19] 11A and 11B are diagrams illustrating a method for manufacturing an anti-vibration spring in a fifth variant of the shape of the anti-vibration spring disclosed herein, in which (A) is a diagram showing the state before bending processing is performed, and (B) is a diagram showing the state after the anti-vibration spring has been manufactured by bending the legs and base. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Hereinafter, an example of an embodiment of the present disclosure will be described with reference to the drawings. In each drawing, the same or equivalent components and parts are given the same reference numerals. In addition, the dimensional ratios of the drawings are exaggerated for the convenience of explanation and may differ from the actual ratios.

[0025] Moreover, the arrow H shown in each figure is a vertical direction indicating the upward direction of the expansion valve, and the arrow W is a horizontal direction indicating the width direction of the expansion valve. The upward direction of the expansion valve is the side where the working rod is arranged with respect to the valve body of the expansion valve, and the width direction of the expansion valve coincides with the direction perpendicular to the up-down direction. Note that the expansion valve in this embodiment is not limited to being arranged so that the up-down direction is oriented along the vertical direction and the width direction is oriented along the horizontal direction.

[0026] In addition, arrow X in each figure indicates the longitudinal direction of the plate material forming the anti-vibration spring and indicates the width direction of the plate material, arrow Y indicates the thickness direction of the plate material and is perpendicular to the width direction of the plate material forming the anti-vibration spring, and arrow Z indicates the longitudinal direction of the plate material and is perpendicular to the width direction and thickness direction of the plate material forming the anti-vibration spring. Arrow R indicates the radial direction of the anti-vibration spring when the plate material is bent to form the anti-vibration spring, and arrow θ indicates the circumferential direction of the anti-vibration spring when the plate material is bent to form the anti-vibration spring.

[0027] [Embodiment] (composition) First, an expansion valve 10 according to this embodiment will be described with reference to Fig. 1 to Fig. 7 as appropriate. Fig. 1 is a vertical cross-sectional view showing the expansion valve 10 according to this embodiment. As shown in Fig. 1, the expansion valve 10 has a valve body 20, a valve element 62, a support member 64, an actuation rod 70, a power element 28, a first vibration-proof spring 80, and a second vibration-proof spring 90.

[0028] As shown in FIG. 1, the valve body 20 has a valve chamber 40, a valve hole 44, an inlet port 22, an outlet port 24, and a return passage 26, and is a member that extends in the vertical direction.

[0029] As shown in Fig. 1, the valve chamber 40 is a space extending in the up-down direction of the valve body 20, and its upper end face (upper side in Fig. 1) is defined as an end face 42. The valve chamber 40 is sealed at its lower side (lower side in Fig. 1) by a sealing member 48 with various components, which will be described later, housed therein. In other words, the valve chamber 40 is an internal space in the valve body 20. In this embodiment, the valve chamber 40 is a circular hole extending in the up-down direction. That is, in this embodiment, the side wall surface 40S, which is the inner peripheral surface of the valve chamber 40, has a circular cross section.

[0030] In the expansion valve 10 according to this embodiment, a fluid (refrigerant) enters the valve chamber 40 from the inlet port 22, passes through the valve hole 44, and flows out from the outlet port 24. The fluid that flows into the inlet port 22 flows out from the outlet port 24 at a lower pressure than when it flowed into the valve chamber 40, due to pressure loss caused by passing through the valve hole 44. The fluid that flows out from the outlet port 24 passes through an evaporator (not shown) and then through a return passage 26 that is formed at the top of the valve body 20 and penetrates the valve body 20 in the direction of the arrow W.

[0031] As shown in FIG. 1, the valve body 20 has a hole penetrating from the upper end to the lower end. More specifically, from the upper side, a through hole 34 through which the actuation rod 70 passes, a valve hole 44 through which the above-mentioned fluid passes, and a valve chamber 40 are formed in this order. That is, the vertical direction in this embodiment is an example of a displacement direction in this embodiment. As shown in FIG. 1, the through hole 34 has an expanded diameter portion 36 that opens toward the return passage 26. In this embodiment, the expanded diameter portion 36 is a circular hole extending in the vertical direction. That is, in this embodiment, the side wall surface 36S, which is the inner peripheral surface of the expanded diameter portion 36, has a circular cross section.

[0032] In this embodiment, the valve body 20 is formed by cutting an aluminum material, for example. In this description, "made of aluminum" refers to a metal material that mainly contains aluminum, and includes being formed from an aluminum alloy as well as a pure aluminum material. Aluminum also includes materials such as pure Al, Al-Cu alloys, Al-Mn alloys, Al-Si alloys, Al-Mg alloys, Al-Mg-Si alloys, and Al-Zn-Mg alloys, and in this embodiment, an appropriate material is selected from these materials.

[0033] 1, the power element 28 is a member attached to the upper part of the valve body 20 and drives an actuating rod 70 (described later) in the vertical direction. More specifically, the power element 28 has a diaphragm 30 that deforms in response to the temperature and pressure of the fluid flowing through the return passage 26, and a stopper member 32 that connects the diaphragm 30 to the actuating rod 70.

[0034] The actuating rod 70 is another example of a displacement portion and an example of an object to be vibration-proofed. As shown in FIG. 1, the actuating rod 70 is a member extending along the vertical direction of the valve body 20, and is connected at its upper end to the stopper member 32. The lower end of the actuating rod 70 passes through the through hole 34 and is located inside the valve hole 44, and is in contact with the valve body 62 described below. The actuating rod 70 has a tapered portion 72 that narrows in diameter downward, and the diameter below the tapered portion 72 is smaller than the diameter above the tapered portion 72. The actuating rod 70 is attached so that the tapered portion 72 is located within the vertical range of the enlarged diameter portion 36 of the through hole 34.

[0035] In this embodiment, the actuation rod 70 is formed by cutting a stainless steel material, for example. That is, in this embodiment, the actuation rod 70 is harder than the valve body 20.

[0036] The support member 64 is disposed inside the valve chamber 40 as shown in Fig. 1. As shown in Fig. 1, the support member 64 is a cylindrical member extending in the vertical direction with an expanded diameter at the upper side, and is disposed on the opposite side of the valve seat 44A across the valve body 62, supporting the valve body 62 from below. The expanded diameter portion of the support member 64 is biased upward from below by the coil spring 46, pressing the valve body 62 against the valve seat 44A. The expanded diameter portion of the support member 64 is pressed from the radially outer side by a first vibration-proof spring 80, which will be described later.

[0037] In this embodiment, both the valve body 62 and the support member 64 are made of stainless steel. That is, in this embodiment, the valve body 62 is harder than the valve body 20. In this description, "stainless steel" refers to an alloy steel that is resistant to corrosion, and "made of stainless steel" refers to being formed from stainless steel material. Examples of stainless steel include austenitic, martensitic, ferritic, two-phase, and precipitation hardening materials, and in this embodiment, an appropriate material is selected from these materials.

[0038] Here, as shown in Fig. 1, the valve body 62 is in contact with the actuation rod 70 at the upper side, and the actuation rod 70 is connected to the power element 28. Therefore, in the expansion valve 10 of this embodiment, when the diaphragm 30 of the power element 28 is deformed, the actuation rod 70 moves downward and presses the valve body 62 downward. In this manner, the power element 28 transmits a driving force to the valve body 62 via the actuation rod 70, and moves the valve body 62 toward and away from the valve seat 44A, thereby changing the valve opening degree. That is, the support member 64 is another example of a displacement portion according to this embodiment, and another example of an object to be vibration-proofed.

[0039] In this embodiment, the first vibration-proof spring 80 is disposed inside the valve chamber 40 as shown in FIG. 1, and is a member that is in sliding contact with the support member 64 on the radially inner side, and has a first base 82 and a plurality of first vibration-proof parts 83 arranged in a line in the circumferential direction of the first base 82. The first vibration-proof parts 83 also have a first bent part 84 and a first leg part 86. The first base 82 is formed in a cylindrical shape. The first bent part 84 is formed by folding back from the lower side of the first base 82 toward the radially inner side. The first leg parts 86 also extend from each of the first bent parts 84 to the opposite side to the first base 82. The radial direction in this embodiment is an example of a direction intersecting with the displacement direction in this embodiment. The first leg parts 86 in this embodiment also have a first sliding contact part 85 that is a part that slidably contacts the support member 64 and biases the support member 64 toward the radially inner side. The first bent portion 84 in the present embodiment is an example of one end of the first vibration-isolating portion 83 on the side of the first base portion 82 and a portion from the end to the first sliding contact portion 85 .

[0040] Next, the specific shape and manufacturing method of the first vibration-proof spring 80 will be described with reference to Figs.

[0041] (Shape and manufacturing method of the first vibration-proof spring 80) As shown in Figure 2, the first vibration-damping spring 80 in this embodiment is formed from a plate material 78 having a rectangular first base 82 extending in the horizontal width direction (left-right direction in Figure 2) and a plurality of first legs 86 extending from the lower side of the first base 82 in the vertical width direction (downward in Figure 2).

[0042] As shown in Fig. 3, the plate material 78 is folded back from the state shown in Fig. 2 toward one side in the thickness direction in Fig. 2 (the front side in the direction perpendicular to the paper surface). Then, from the state shown in Fig. 3, the first base portion 82 is bent into a cylindrical shape so that the folded back side of the first leg portion 86 is on the inside in the radial direction, as shown in Fig. 4. As a result, as shown in Fig. 4, the first vibration-proof spring 80 has a first bent portion 84 formed at the lower end in the vertical width direction of the first base portion 82, and the first leg portion 86 extends from the first bent portion 84 toward the upper side in the vertical width direction.

[0043] In this embodiment, the number of first leg portions 86 is six. In addition, as shown in Fig. 4, when the first base portion 82 is bent, the first leg portions 86 are positioned side by side at equal intervals (60°) from each other.

[0044] The manufacturing method of the second anti-vibration spring 90 is the same as that of the first anti-vibration spring 80. That is, the first base 82, the first anti-vibration portion 83, the first bent portion 84, the first sliding contact portion 85, and the first leg portion 86 of the first anti-vibration spring 80 correspond to the second base 92, the second anti-vibration portion 93, the second bent portion 94, the second sliding contact portion 95, and the second leg portion 96 of the second anti-vibration spring 90, respectively. In the following description, when the first anti-vibration spring 80 and the second anti-vibration spring 90 are not distinguished from each other, they will be simply referred to as anti-vibration springs 80 and 90. Similarly, in the following description, when the first anti-vibration spring 80 and the second anti-vibration spring 90 are not distinguished from each other, their respective components will be simply referred to as bases 82 and 92, anti-vibration portions 83 and 93, bent portions 84 and 94, sliding contact portions 85 and 95, and legs 86 and 96.

[0045] In this embodiment, as shown in Fig. 1, Fig. 4, and Fig. 6 described later, the legs 86, 96 of the vibration-proof springs 80, 90 are bent radially inward as they approach the opposite side of the bent portions 84, 94 in the up-down direction. In other words, the tip side of the legs 86, 96 of the vibration-proof portions 83, 93 is located more inward than the bent portions 84, 94. The tip side of the legs 86, 96 is an example of the side of the abutted portion across the sliding contact portions 85, 95 of the vibration-proof portions 83, 93. The bent portions 84, 94 are an example of the side of the vibration-proof portions 83, 93 opposite the abutted portion across the sliding contact portions 85, 95.

[0046] As shown in Fig. 1 and Fig. 6 described later, the first vibration-proof spring 80 formed in this manner is disposed so that the first base portion 82 contacts the side wall surface 40S of the valve chamber 40 and presses the support member 64 radially inwardly of the valve chamber 40. More specifically, the first leg portions 86 contact the support member 64 and urge the support member 64 radially inwardly by the elasticity of the first bent portion 84 and the first leg portions 86. That is, the valve chamber 40 is an example of an arrangement portion and an example of an attachment target in this embodiment. Also, the side wall surface 40S of the valve chamber 40 is an example of an inner circumferential surface of the arrangement portion and an inner circumferential surface of an attachment target in this embodiment.

[0047] In addition, since the first legs 86 are arranged at equal intervals in the circumferential direction, the first vibration-proof spring 80 aligns the radial center of the support member 64 and the radial center of the first base 82 in the vertical direction. In other words, the arrangement in which the first legs 86 are arranged at equal intervals in the circumferential direction in the first vibration-proof spring 80 is an example of an arrangement in which the radial center (axis) of the support member 64 is positioned at the center (axis) of the first base 82 of the first vibration-proof spring 80. In addition, each of the first legs 86 is formed such that one end on the first base 82 side and the other end on the radial inner side are formed at the same circumferential position on the first base 82. Here, the same circumferential position means that the first legs 86 extend substantially in the radial direction, and as an example, the circumferential positions of one end and the other end overlap when viewed from the vertical direction. In other words, when viewed from the top and bottom, the first bend portion 84 and the first leg portion 86 are arranged in the following order in the direction from one end toward the object to be vibration-damped: at least a part of the one end, at least a part of the portion from the one end to the first sliding contact portion 85, at least a part of the first sliding contact portion 85, and the object to be vibration-damped.

[0048] In addition, the direction from one end of the first vibration-damping spring 80 toward the object to be damped is the direction from the circumferential center of the first bent portion 84 toward the center of the support member 64, which is the object to be damped. In other words, at least a portion of the first bent portion 84 and each portion of the first leg portion 86 is shaped to overlap a line connecting the circumferential center of the first bent portion 84 to the center of the support member 64, which is the object to be damped.

[0049] Furthermore, in this embodiment, when the first vibration-proof spring 80 is not incorporated in the valve body 20, the outer diameter (developed length) of the first base 82 is preferably slightly smaller than the inner diameter (circumferential length) of the valve chamber 40. Furthermore, when the first vibration-proof spring 80 is incorporated in the valve body 20 and the support member 64 is in sliding contact with the first leg portion 86, the first base 82 is preferably expanded radially outward by the support member 64, so that the first base 82 receives a reaction force from the side wall surface 40S. Furthermore, in this embodiment, the side wall surface 40S of the valve chamber 40 and the first base 82 are both cylindrical, and therefore the side wall surface 40S and the outer circumferential surface of the first base 82 are fixed in surface contact with each other.

[0050] As shown in FIG. 1 and FIG. 6 described later, the second vibration-proof spring 90 is disposed so that the second base portion 92 contacts the side wall surface 36S of the enlarged diameter portion 36 and presses the actuation rod 70 toward the radial inside of the enlarged diameter portion 36. More specifically, a part of the multiple second legs 96 slides against the tapered portion 72 of the actuation rod 70 and biases the tapered portion 72 toward the radial inside by the elasticity of the second bent portion 94 and the second legs 96. That is, the enlarged diameter portion 36 is another example of the arrangement portion in this embodiment and another example of the mounting target. The side wall surface 36S of the enlarged diameter portion 36 is another example of the inner circumferential surface of the arrangement portion and the inner circumferential surface of the mounting target in this embodiment. Since the multiple second legs 96 are disposed at equal intervals in the circumferential direction, the second vibration-proof spring 90 causes the radial center of the actuation rod 70 to coincide with the radial center of the second base portion 92. In other words, the arrangement in which the second leg portions 96 are arranged at equal intervals in the circumferential direction in the second vibration-proof spring 90 is an example of an arrangement in which the radial center (axis) of the working rod 70 is positioned at the center (axis) of the second base portion 92 of the second vibration-proof spring 90. In addition, each of the second legs 96 is formed such that one end on the second base portion 92 side and the other end on the radially inner side are formed at the same circumferential position on the second base portion 92. Here, the same circumferential position means that the second leg portion 96 extends substantially in the radial direction, and as an example, the circumferential positions of one end and the other end overlap when viewed from the up-down direction. In other words, the second bent portion 94 and each portion of the second leg portion 96 are arranged in the order of at least a part of the one end, at least a part of the portion from the one end to the second sliding contact portion 95, at least a part of the second sliding contact portion 95, and the vibration-proof object in the direction from the one end toward the vibration-proof object when viewed from the up-down direction.

[0051] In addition, the direction from one end of the second vibration-damping spring 90 toward the object to be damped is the direction from the circumferential center of the second bent portion 94 toward the center of the actuating rod 70, which is the object to be damped. In other words, at least a portion of the second bent portion 94 and each of the second leg portion 96 is shaped to overlap a line connecting the circumferential center of the second bent portion 94 to the center of the actuating rod 70, which is the object to be damped.

[0052] In addition, in this embodiment, when the second vibration-proof spring 90 is not incorporated in the valve body 20, the outer diameter (developed length) of the second base 92 is preferably slightly smaller than the inner diameter (circumferential length) of the enlarged diameter portion 36. In addition, when the second vibration-proof spring 90 is incorporated in the valve body 20 and the tapered portion 72 of the actuation rod 70 is in sliding contact with the second leg portion 96, the second base 92 is preferably expanded radially outward by the tapered portion 72, so that the second base 92 receives a reaction force from the side wall surface 36S. In this embodiment, the side wall surface 36S of the enlarged diameter portion 36 and the second base 92 are both circular, and therefore the side wall surface 36S and the outer circumferential surface of the second base 92 are fixed in surface contact with each other.

[0053] As shown in FIG. 6(A) to be described later, the angle at which the second bent portion 94 of the second vibration-proof spring 90 is folded back is greater than 90° and less than 180°. Similarly, as shown in FIG. 6(B) to be described later, the angle at which the first bent portion 84 of the first vibration-proof spring 80 is folded back is greater than 90° and less than 180°. For this reason, the first vibration-proof spring 80 and the second vibration-proof spring 90 are formed so that the legs 86, 96 face radially inward toward the opposite side of the bent portions 84, 94. The angles at which the bent portions 84, 94 of the vibration-proof springs 80, 90 are folded back are angles when the vibration-proof springs 80, 90 are incorporated in the expansion valve 10, and do not necessarily correspond to the shapes of the springs when they are not incorporated in the expansion valve 10 (natural state). In the description of this embodiment, "folded back" refers to a state in which the angle between the direction in which the bases 82, 92 extend (ie, the vertical direction) and the direction in which the legs 86, 96 extend exceeds 90°.

[0054] Furthermore, the radial length and the vertical width length of the first vibration-isolating spring 80 and the second vibration-isolating spring 90 are appropriately set depending on the location where they are disposed and the object to be damped.

[0055] 2 to 4, the vertical width direction of the anti-vibration springs 80, 90 indicated by arrow Z is arranged to coincide with the up-down direction of the expansion valve 10 indicated by arrow H in Fig. 1. In this embodiment, the first anti-vibration spring 80 is arranged so that the upward direction of the expansion valve 10 coincides with the upward direction of the expansion valve 10. As shown in Fig. 6(B) described later, the side of the first base 82 opposite the first bent portion 84 abuts against the end face 42. In other words, the end face 42 of the valve chamber 40 is an example of an abutting portion that the first base 82 in this embodiment faces in the up-down direction and can abut against.

[0056] 1, the second anti-vibration spring 90 is arranged such that the orientation of the bent portions 84, 94 in the up-down direction is different from that of the first anti-vibration spring 80. More specifically, the first anti-vibration spring 80 is arranged such that the first bent portion 84 is located on the side farther from the end face 42 (the lower side in FIG. 1), and the second anti-vibration spring 90 is arranged such that the second bent portion 94 is located on the side farther from the end face 42 (the upper side in FIG. 1). In other words, the first anti-vibration spring 80 and the second anti-vibration spring 90 are both arranged such that the legs 86, 96 are directed radially inward toward the side closer to the end face 42. Also, as shown in FIG. 6(A) described later, the side of the second base portion 92 opposite the second bent portion 94 is abutted against the bottom surface 36B of the enlarged diameter portion 36. That is, the bottom surface 36B of the expanded diameter portion 36 is another example of an abutted portion with which the second base portion 92 in this embodiment faces in the up-down direction and with which the second base portion 92 can abut.

[0057] In this embodiment, the first vibration-proof spring 80 and the second vibration-proof spring 90 are made of stainless steel, for example. That is, in this embodiment, the first vibration-proof spring 80 and the second vibration-proof spring 90 are harder than the valve body 20.

[0058] Next, an example of a procedure for assembling the expansion valve 10 in this embodiment will be described.

[0059] In the expansion valve 10 according to this embodiment, first, the first vibration-proof spring 80, and the pre-joined valve element 62 and support member 64 are assembled in this order to the valve body 20 from below. With the support member 64 assembled to the valve body 20, the coil spring 46 and sealing member 48 are assembled in this order to the valve body 20 from below. The support member 64 is then biased upward by the coil spring 46. Note that the valve element 62 and the support member 64 may be joined by any method, but as an example, they are joined by welding.

[0060] 1 and FIG. 6(B) described later, in this embodiment, the support member 64 comes into sliding contact with the first leg portion 86 during the assembly operation. Therefore, the first vibration-proof spring 80 is pressed radially outward and upward. In other words, the first base portion 82 of the first vibration-proof spring 80 abuts against the end face 42.

[0061] Next, the second vibration-proof spring 90 and the actuation rod 70 are assembled in this order to the valve body 20 from above. Furthermore, with the actuation rod 70 assembled to the valve body 20, the stopper member 32 of the power element 28 is connected to the upper end of the actuation rod 70. Then, with the actuation rod 70 and the power element 28 connected, the power element 28 is attached to the upper part of the valve body 20.

[0062] 1 and FIG. 6(A) described later, in this embodiment, the tapered portion 72 of the actuation rod 70 comes into sliding contact with the second leg portion 96 during the assembly operation. Therefore, the second vibration-proof spring 90 is pressed radially outward and downward. In other words, the second base portion 92 of the second vibration-proof spring 90 abuts against the bottom surface 36B.

[0063] Next, the operation of the expansion valve 10 in this embodiment will be described. Note that Fig. 6 is an enlarged view of the vibration-proof springs 80, 90 in Fig. 1, and Fig. 7 is an enlarged view of the vibration-proof springs 80, 90 in Fig. 5. Also, (A) in Fig. 6 and Fig. 7 is an enlarged view of the second vibration-proof spring 90 that isolates the operating rod 70, and (B) in Fig. 6 and Fig. 7 is an enlarged view of the first vibration-proof spring 80 that isolates the support member 64.

[0064] (Operation of Expansion Valve 10) In the expansion valve 10 in this embodiment, the diaphragm 30 of the power element 28 is deformed from the state shown in Fig. 1 (closed state), so that the actuation rod 70 presses the valve body 62 downward. Furthermore, when the actuation rod 70 presses the valve body 62, the coil spring 46 is shortened and deformed, so that the valve body 62 moves downward together with the support member 64, as shown in Fig. 5. This separates the valve body 62 from the valve seat 44A, allowing the fluid that has flowed in from the inlet port 22 to flow toward the outlet port 24. In other words, the power element 28 adjusts the valve opening degree of the expansion valve 10.

[0065] Here, as shown in FIG. 6(A) and FIG. 7(A), when the power element 28 drives the actuation rod 70, the tapered portion 72 of the actuation rod 70 is pressed downward. Therefore, from FIG. 6(A) to FIG. 7(A), the tapered portion 72 of the actuation rod 70 moves while sliding against the second leg portion 96 of the second vibration-proof spring 90. Here, as shown in FIG. 6(A) and the like, the lower end of the second leg portion 96 is located inside of the upper end. Therefore, when the actuation rod 70 moves downward, the load with which the second leg portion 96 of the second vibration-proof spring 90 urges the actuation rod 70 radially inward increases. In other words, in the expansion valve 10 of this embodiment, when the valve opening increases, the load that the actuation rod 70 receives from the second vibration-proof spring 90 increases, and when the valve opening decreases, the load that the actuation rod 70 receives from the second vibration-proof spring 90 decreases.

[0066] 7(A), the second leg 96 of the second vibration-proof spring 90 according to this embodiment is in sliding contact with the tapered portion 72 of the actuating rod 70 even when the valve opening is reduced. Therefore, the second vibration-proof spring 90 according to this embodiment suppresses the vibration of the actuating rod 70 caused by the drive of the actuating rod 70 by the power element 28 and the flow of the fluid.

[0067] Also, as shown in FIG. 6(B) and FIG. 7(B), when the power element 28 drives the actuation rod 70, the support member 64 is pressed downward. Therefore, from FIG. 6(B) to FIG. 7(B), the support member 64 moves while sliding toward the side opposite to the side of the first vibration-proof spring 80 where the inner circumference is narrow. Here, as shown in FIG. 6(B) and the like, the upper end of the first leg portion 86 is located inside the lower end. Therefore, when the support member 64 moves upward, the load with which the first leg portion 86 of the first vibration-proof spring 80 urges the support member 64 toward the inside in the radial direction decreases. In other words, in the expansion valve 10 of this embodiment, when the valve opening degree increases, the load that the support member 64 receives from the first vibration-proof spring 80 decreases, and when the valve opening degree decreases, the load that the support member 64 receives from the first vibration-proof spring 80 increases.

[0068] 7(B), the first leg 86 of the first vibration-proof spring 80 according to this embodiment is in sliding contact with the support member 64 even when the valve opening degree increases. Therefore, the first vibration-proof spring 80 according to this embodiment suppresses vibration of the valve body 62 and the support member 64 caused by driving of the valve body 62 and the support member 64 by the power element 28 and by the flow of fluid.

[0069] Generally, when components are in sliding contact with each other, components made of a material with low hardness are more likely to wear out. For example, in the expansion valve 10 of this embodiment, the valve body 20 is made of an aluminum material, so when it is in sliding contact with other components such as the vibration-proof springs 80 and 90, the sliding contact parts are more likely to wear out.

[0070] In addition, the hardness referred to here may be measured by any measurement method as long as it represents the tendency of wear between sliding parts, but as an example, Vickers hardness measured by the method specified in JIS Z 2244-1:2020 is used.

[0071] Next, the operation and effects of the expansion valve 10 in this embodiment will be described.

[0072] (Action and effect) In the expansion valve 10 of this embodiment, the first vibration-proof spring 80 has a first base portion 82, a first bent portion 84, and a first leg portion 86, and the first base portion 82 of the first vibration-proof spring 80 is attached to the valve chamber 40. In addition, the first vibration-proof portion 83 of the first vibration-proof spring 80 has a first sliding contact portion 85 of the first vibration-proof portion 83 extending from the first base portion 82 slidably contact the support member 64 and biases the support member 64 radially inward to prevent vibration. In the expansion valve 10 according to this aspect, the first vibration-proof portion 83 is arranged in the following order in the direction from one end of the first vibration-proof portion 83 on the first base portion 82 side toward the vibration-proof target, in the order of at least a part of the one end, at least a part of the portion from the one end to the first sliding contact portion 85, at least a part of the first sliding contact portion 85, and the support member 64, as viewed from the top-bottom direction. In addition, in the expansion valve 10 according to this embodiment, the first leg 86 extends from the end of the first base 82 in the displacement direction, and therefore the first leg 86 is not limited by the circumferential length of the first base 82. And, in the expansion valve 10 according to this embodiment, it is sufficient that the first leg 86 is shaped to come into contact with the support member 64 that displaces in the vertical direction, so that the degree of freedom in designing the first vibration-proof spring 80 can be improved.

[0073] In the expansion valve 10 of this embodiment, the second vibration-proof spring 90 has a second base 92, a second bent portion 94, and a second leg 96, and the second base 92 of the second vibration-proof spring 90 is attached to the enlarged diameter portion 36. In addition, the second vibration-proof portion 93 of the second vibration-proof spring 90 has a second sliding contact portion 95 of the second vibration-proof portion 93 extending from the second base 92 that slidably contacts the operating rod 70 and biases the operating rod 70 radially inward to prevent vibration. In the expansion valve 10 according to this aspect, the second vibration-proof portion 93 is arranged in the following order in the direction from one end of the second vibration-proof portion 93 on the second base 92 side toward the vibration-proof target, as viewed from the top-bottom direction: at least a part of the one end, at least a part of the portion from the one end to the second sliding contact portion 95, at least a part of the second sliding contact portion 95, and the operating rod 70. In addition, in the expansion valve 10 according to this embodiment, the second leg 96 extends from the end of the second base 92 in the displacement direction, and therefore the second leg 96 is not limited by the circumferential length of the second base 92. And, in the expansion valve 10 according to this embodiment, it is sufficient that the second leg 96 is shaped to come into contact with the working rod 70 that displaces in the vertical direction, and therefore the degree of freedom in designing the second vibration-proof spring 90 can be improved.

[0074] In addition, in the expansion valve 10 of this embodiment, the bases 82, 92 are formed in a cylindrical shape. In addition, in the expansion valve 10 of this embodiment, the vibration-proof parts 83, 93 have bent parts 84, 94 that are folded back from the vertical end (one end) of the bases 82, 92 toward the opposite end (other end) in the vertical direction, and legs 86, 96 that extend from the bent parts 84, 94 toward the opposite end in the vertical direction. In the expansion valve 10 of this embodiment, the bent parts 84, 94 and the legs 86, 96 are arranged in a circumferential direction of the bases 82, 92 in a plurality of rows. Therefore, according to the expansion valve 10 of this embodiment, the vertical length of the vibration-proof springs 80, 90 can be shortened compared to a configuration in which the vibration-proof parts 83, 93 are arranged in a vertical direction. In addition, according to the expansion valve 10 of this embodiment, the vibration-proof springs 80, 90 can be manufactured by bending and processing a single plate material 78.

[0075] Moreover, according to the expansion valve 10 of this embodiment, the first base 82 of the first vibration-proof spring 80 abuts against the end surface 42, and the tip side of the first leg 86 of the first vibration-proof part 83 is located inside the first bent part 84 across the first sliding contact part 85. Therefore, according to the expansion valve 10 of this embodiment, when the support member 64 is displaced upward, the support member 64 and the first leg 86 slide against each other, so that the tip side (upper side) of the first leg 86 is expanded, and the first vibration-proof spring 80 receives a load toward the outside and the upper side in the radial direction. Also, when the support member 64 is displaced downward, the first leg 86 is narrowed toward the inside in the radial direction, so that it falls toward the expanded diameter part of the support member 64. As a result, the first leg 86 is lifted up by the support member 64, so that the first vibration-proof spring 80 receives a load toward the upper side. The upper portion of the first base 82 of the first vibration-proof spring 80 abuts against the end face 42 of the valve chamber 40. Therefore, according to the expansion valve 10 of this embodiment, the first vibration-proof spring 80 can be attached to the inner circumferential surface of the valve chamber 40 without being fixed, compared to when the tip side of the first leg portion 86 is located radially outward from the first bent portion 84.

[0076] Moreover, according to the expansion valve 10 of this embodiment, the second base 92 of the second vibration-proof spring 90 abuts against the bottom surface 36B of the enlarged diameter portion 36, and the tip side of the second leg 96 of the second vibration-proof portion 93 is located inside the second bent portion 94 across the second sliding contact portion 95. Therefore, according to the expansion valve 10 of this embodiment, when the working rod 70 is displaced downward, the working rod 70 and the second leg 96 are in sliding contact with each other, so the tip side (lower side) of the second leg 96 is expanded, and the second vibration-proof spring 90 receives a load toward the outside and the lower side in the radial direction. Also, when the working rod 70 is displaced upward, the second leg 96 is narrowed toward the inside in the radial direction, so that it rises toward the tapered portion 72 of the working rod 70. As a result, the second leg is inserted into the tapered portion 72 of the working rod 70, so that the second vibration-proof spring 90 receives a load toward the lower side. The second base 92 of the second vibration-proof spring 90 has a lower portion that abuts against the bottom surface 36B of the expanded diameter portion 36. Therefore, according to the expansion valve 10 of this embodiment, the second vibration-proof spring 90 can be attached to the inner circumferential surface of the expanded diameter portion 36 without being fixed, compared to when the tip side of the second leg is located radially outward of the second bent portion 94.

[0077] Furthermore, according to the expansion valve 10 of this embodiment, the second vibration-isolating spring 90 can dampen the vibration of the operating rod 70 .

[0078] Furthermore, according to the expansion valve 10 of this embodiment, the first vibration-isolating spring 80 can absorb vibrations of the valve body 62 and the support member 64 .

[0079] Furthermore, according to the expansion valve 10 of this embodiment, the first vibration-proof spring 80, which is harder than the valve body 20, is attached to the inner circumferential surface of the valve chamber 40. As a result, according to the expansion valve 10 of this aspect, since the first vibration-proof spring 80 is attached to the inner circumferential surface of the valve chamber 40, the first vibration-proof spring 80 does not slide against the inner circumferential surface of the valve chamber 40, and therefore, even if the first vibration-proof spring 80 is formed from a material harder than the valve body 20, it is possible to prevent wear on the inner circumferential surface of the valve chamber 40. Alternatively, even if the first vibration-proof spring 80 slides against the valve body 20 when the valve body 62 and the support member 64 are driven, the degree of sliding can be reduced, so wear on the inner circumferential surface of the valve chamber 40 can be suppressed.

[0080] The anti-vibration springs 80, 90 of this embodiment include anti-vibration parts 83, 93 having cylindrically formed base parts 82, 92, bent parts 84, 94 folded back toward the opposite side in the up-down direction, and a plurality of legs 86, 96 lined up in the circumferential direction of the base parts 82, 92. Moreover, in the anti-vibration springs 80, 90 of this embodiment, the base parts 82, 92 are attached to the side wall surface 36S and the side wall surface 40S, which are the inner circumferential surfaces of the expanded diameter part 36 and the valve chamber 40. Moreover, the anti-vibration springs 80, 90 include bent parts 84, 94 folded back toward the opposite side in the up-down direction, and a plurality of legs 86, 96 lined up in the circumferential direction of the base parts 82, 92. In the anti-vibration springs 80, 90 according to this embodiment, the anti-vibration portions 83, 93 are arranged in the order of at least a part of the bent portions 84, 94, at least a part of the portion from the bent portions 84, 94 to the sliding contact portions 85, 95, at least a part of the sliding contact portions 85, 95, and the anti-vibration object, when viewed from the top-bottom direction. As a result, with the anti-vibration springs 80, 90, it is not necessary to fix the anti-vibration springs 80, 90 to the enlarged diameter portion 36 and the valve chamber 40, or the support member 64 and the actuation rod 70, in order to isolate the support member 64 or the actuation rod 70. In the anti-vibration springs 80, 90 according to this embodiment, it is sufficient that the anti-vibration portions 83, 93 are shaped to come into contact with the displacement portion that displaces in the top-bottom direction. Therefore, the length of the vibration-isolating parts 83, 93 is not limited by the circumferential length of the inner circumferential surface of the arrangement part to which the base parts 82, 92 are attached, thereby improving the design freedom of the vibration-isolating springs 80, 90.

[0081] Next, modified examples according to this embodiment will be described with reference to Fig. 8 to Fig. 19 as appropriate. In the subsequent drawings showing modified examples, the same reference numerals as in the embodiment will be used for configurations similar to those in the embodiment, and detailed description will be omitted. Figs. 8 to 14 are views showing first to seventh modified examples of the expansion valve 10 of this embodiment, respectively. Figs. 15 to 19 are views showing first to fifth modified examples of the vibration-proof springs 80, 90, respectively.

[0082] Furthermore, in the drawings and explanations relating to the modified examples of this embodiment, when the components of the first vibration-proof spring 80 or the second vibration-proof spring 90 differ in aspect from the above-described embodiment, the reference numerals described in the embodiment are suffixed with letters A to L. For example, vibration-proof springs 80A, 90A in the first modified example of expansion valve 10 correspond to vibration-proof springs 80, 90 in the expansion valve 10 of the embodiment.

[0083] <First Modification of Expansion Valve 10> As shown in FIG. 8, the first modified example of the expansion valve 10 differs from the expansion valve 10 in the embodiment in the following respects.

[0084] As shown in Fig. 8(A), the second vibration-proof spring 90A has the second bent portion 94A disposed on the lower side. As shown in Fig. 8(A), the bent angle of the second vibration-proof spring 90 exceeds 180°. Therefore, the lower side of the second leg portion 96A of the second vibration-proof spring 90A faces inward in the radial direction. In other words, the second vibration-proof spring 90 in this modified example is formed so as to face inward in the radial direction toward the end face 42.

[0085] As shown in Fig. 8(B), the first vibration-proof spring 80A has the bent portion 84A disposed on the upper side. Note that, as shown in Fig. 8(B), the bending angle of the first vibration-proof spring 80A exceeds 180°. Therefore, the upper side of the first leg portion 86A of the first vibration-proof spring 80A faces inward in the radial direction. In other words, the first vibration-proof spring 80A in this modified example is formed so as to face inward in the radial direction toward the end face 42.

[0086] The other configurations are the same as those of the above-described embodiment. Furthermore, the expansion valve 10 in this modified example can achieve the same functions and effects as those of the above-described embodiment.

[0087] <Second Modification of Expansion Valve 10> As shown in FIG. 9, the second modified example of the expansion valve 10 differs from the expansion valve 10 in the embodiment in the following respects.

[0088] As shown in Fig. 9(A), in the working rod 70 of this modification, the tapered portion 72B is formed so as to be narrower at the top. That is, the diameter is smaller at the top side of the tapered portion 72B than at the bottom side of the tapered portion 72B. The working rod 70 is also attached so that the tapered portion 72B is located within the vertical range of the enlarged diameter portion 36 of the through hole 34.

[0089] 9(A), the enlarged diameter portion 36 has a stopper 36R at the upper portion of the side wall surface 36S for restricting the second vibration-proof spring 90B from moving in the up-down direction. The stopper 36R comes into contact with the second base portion 92B of the second vibration-proof spring 90B on the side opposite the second bent portion 94B of the second vibration-proof spring 90B. The stopper 36R according to this modification may be formed in any manner, and may be formed by combining a member separate from the valve body 20.

[0090] Also, as shown in Fig. 9(A), in this modified example, the second vibration-proof spring 90B is arranged so that the second bent portion 94B faces downward. As shown in Fig. 9(A), the folding angle of the second vibration-proof spring 90B is greater than 90° and less than 180°. Therefore, the upper side of the second leg portion 96B of the second vibration-proof spring 90 faces inward in the radial direction. In other words, the second leg portion 96B of the second vibration-proof spring 90B in this modified example is formed so as to face inward in the radial direction toward the opposite side to the bottom surface 36B.

[0091] 9(B), in this modification, the shape of the first vibration-proof spring 80 is the same as in the embodiment. Also, the other configurations are the same as in the embodiment.

[0092] In this modified example, the second leg 96B of the second vibration-proof spring 90B is formed so that the upper side faces radially inward. Therefore, in this modified example, when the actuation rod 70 moves upward, the second vibration-proof spring 90B receives a load in the direction opposite to the bottom surface 36B. In addition, when the first vibration-proof spring 80 and the second vibration-proof spring 90B bend between the open and closed valve positions, the directions in which the loads generated on each of them act can be aligned.

[0093] Here, in the expansion valve 10 according to this modification, the enlarged diameter portion 36 has the retaining member 36R, so that the second vibration-proof spring 90B is restricted from moving in the vertical direction. Therefore, in the expansion valve 10 according to this modification, the second vibration-proof spring 90B also damps the vibration of the actuating rod 70 in the same manner as in the present embodiment.

[0094] In addition, the expansion valve 10 in this modified example can achieve other functions and effects similar to those of the embodiment.

[0095] <Third Modification of Expansion Valve 10> As shown in FIG. 10, the third modified example of the expansion valve 10 differs from the expansion valve 10 in the embodiment in the following respects.

[0096] 10(A), the enlarged diameter portion 36 in this modified example has a shape similar to that of the second modified example of the expansion valve 10. This retainer 36R comes into contact with the second base portion 92C of the second vibration-proof spring 90C on the side where the second bent portion 94C of the second vibration-proof spring 90C is formed.

[0097] Also, as shown in Fig. 10(A), in this modified example, the second vibration-proof spring 90C is arranged so that the second bent portion 94C faces upward. As shown in Fig. 10(A), the bending angle of the second vibration-proof spring 90C exceeds 180°. Therefore, the upper side of the second leg portion 96C of the second vibration-proof spring 90C faces inward in the radial direction. In other words, the second leg portion 96C of the second vibration-proof spring 90C in this modified example is formed so as to face inward in the radial direction toward the opposite side to the bottom surface 36B.

[0098] 10(B), in this modification, the shape of the first vibration-proof spring 80A is the same as that of the first modification of the expansion valve 10. The other configurations are the same as those of the above-described embodiment.

[0099] Moreover, the expansion valve 10 in this modified example can obtain the same functions and effects as the expansion valve 10 in the second modified example.

[0100] <Fourth Modification of Expansion Valve 10> As shown in FIG. 11, the fourth modified example of the expansion valve 10 differs from the expansion valve 10 in the embodiment in the following respects.

[0101] 11(B), the valve chamber 40 has a stopper 40R at the bottom of the side wall surface 40S for restricting the first vibration-proof spring 80D from moving in the up and down direction. The stopper 40R comes into contact with the first base portion 82D of the first vibration-proof spring 80D on the side opposite the first bent portion 84D of the first vibration-proof spring 80D. Note that the stopper 40R in this modified example may be formed in any manner, and may be formed by combining a member separate from the valve body 20.

[0102] As shown in FIG. 11B, in this modification, the first vibration-proof spring 80D is arranged so that the first bent portion 84D faces upward. As shown in FIG. 11B, the bent angle of the first vibration-proof spring 80D is greater than 90° and less than 180°. Therefore, the lower side of the first leg portion 86D of the first vibration-proof spring 80D faces inward in the radial direction. In other words, the first leg portion 86D of the first vibration-proof spring 80D in this modification is formed so as to face inward in the radial direction toward the opposite side to the end face 42.

[0103] 11A, in this modified example, the shape of the second vibration-proof spring 90 is the same as in the embodiment. Also, the other configurations are the same as in the embodiment.

[0104] In this modified example, the first leg 86D of the first vibration-proof spring 80D is formed so that the lower side faces radially inward, and therefore when the support member 64 moves downward, the first vibration-proof spring 80D receives a load directed toward the opposite side to the end face 42. Furthermore, when the first vibration-proof spring 80 and the second vibration-proof spring 90B bend between the open and closed valve positions, the directions in which the loads generated on each spring act can be aligned.

[0105] Here, in the expansion valve 10 according to this modification, the valve chamber 40 has a retaining member 40R, so that the movement of the first vibration-proof spring 80D in the vertical direction is restricted. Therefore, in the expansion valve 10 according to this modification, the first vibration-proof spring 80D also damps the vibration of the valve body 62 and the support member 64, similar to the embodiment of the present invention.

[0106] In addition, the expansion valve 10 in this modified example can achieve other functions and effects similar to those of the embodiment.

[0107] <Fifth Modification of Expansion Valve 10> As shown in FIG. 12, the fifth modification of the expansion valve 10 differs from the expansion valve 10 in the embodiment in the following respects.

[0108] 12(B), the valve chamber 40 in this modified example has the same shape as that of the fourth modified example of the expansion valve 10. This retainer 40R comes into contact with the first base portion 82E of the first vibration-proof spring 80E on the side where the first bent portion 84E of the first vibration-proof spring 80E is formed.

[0109] As shown in Fig. 12(B), in this modification, the first vibration-proof spring 80E is arranged so that the first bent portion 84E faces downward. As shown in Fig. 12(B), the bent angle of the first vibration-proof spring 80E exceeds 180°. Therefore, the lower side of the first leg portion 86E of the first vibration-proof spring 80E faces inward in the radial direction. In other words, the first vibration-proof spring 80E in this modification is formed so as to face inward in the radial direction toward the opposite side to the end face 42.

[0110] 12(A), in this modification, the shape of the second vibration-proof spring 90A is the same as that of the first modification of the expansion valve 10. The other configurations are the same as those of the above-described embodiment.

[0111] Moreover, the expansion valve 10 in this modification can obtain the same functions and effects as the expansion valve 10 in the fourth modification.

[0112] <Sixth Modification of Expansion Valve 10> As shown in FIG. 13, the sixth modified example of the expansion valve 10 differs from the expansion valve 10 in the embodiment in the following respects.

[0113] 13(A), the expanded diameter portion 36 in this modified example has a shape similar to that of the second modified example of the expansion valve 10. This retainer 36R comes into contact with the second base portion 92F of the second vibration-proof spring 90F on the side opposite to the side on which the second bent portion 94F of the second vibration-proof spring 90F is formed.

[0114] As shown in Fig. 13(A), in this modified example, the second vibration-proof spring 90F is arranged so that the second bent portion 94F faces downward. As shown in Fig. 13(A), the bent angle of the second vibration-proof spring 90F is set to 180°. Therefore, the second leg portion 96F of the second vibration-proof spring 90F is formed so that the inner radial length is equal within the range of the vertical length.

[0115] As shown in FIG. 13(A), in this modified example, the working rod 70 does not have a tapered portion 72, and is formed so that the outer diameter is uniform within the range of its vertical length.

[0116] 13(B), the valve chamber 40 in this modification has the same shape as that of the fourth modification of the expansion valve 10. This retainer 40R contacts the first base portion 82F of the first vibration-proof spring 80F on the side opposite to the side on which the first bent portion 84F of the first vibration-proof spring 80F is formed.

[0117] As shown in Fig. 13B, in this modified example, the first vibration-proof spring 80F is arranged so that the first bent portion 84F faces upward. As shown in Fig. 13B, the folding angle of the first vibration-proof spring 80F is set to 180°. Therefore, the first leg portion 86F of the first vibration-proof spring 80F is formed so that the inner radial length is equal within the range of the vertical length.

[0118] The other configurations are the same as those of the present embodiment.

[0119] In addition, the expansion valve 10 in this modified example can obtain the same functions and effects as the second to fifth modified examples of the expansion valve 10, except for the effect of directing the vibration-proof springs 80, 90 in one of the vertical directions.

[0120] <Seventh Modification of Expansion Valve 10> As shown in FIG. 14, the seventh modification of the expansion valve 10 differs from the expansion valve 10 in the embodiment in the following respects.

[0121] 14, the expanded diameter portion 36 in this modification has the same shape as in the embodiment. Also, in this modification, the second vibration-proof spring 90G is disposed in the same manner as in the embodiment.

[0122] 14(A), in this modification, the actuating rod 70G does not have a taper, and has a protrusion 74G with an expanded outer diameter in the range of the vertical length of the expanded diameter portion 36. The actuating rod 70 is formed so that the outer diameter is constant in places other than the protrusion 74G.

[0123] The other configurations are the same as those of the present embodiment.

[0124] Moreover, the expansion valve 10 in this modified example can obtain the same functions and effects as the expansion valve 10 in the first modified example.

[0125] Next, modified examples of the anti-vibration springs 80 and 90 in the present disclosure will be described. In the following explanation, modified examples of the first anti-vibration spring 80 will be described, but the second anti-vibration spring 90 can also adopt modified examples similar to those of the first anti-vibration spring 80.

[0126] <First Modification of the First Vibration-Isolating Spring 80> In the above-described embodiments and modifications, the anti-vibration springs 80, 90 have legs 86, 96 arranged at equal intervals in the circumferential direction, as an example of a configuration in which the radial center of the displacement portion is positioned at the radial center of the base portion 82, 92. In the following modification of the first anti-vibration spring 80, the displacement portion is biased so that the center of the displacement portion is eccentric with respect to the center of the base. As an example, as shown in Fig. 15, the first modification of the first anti-vibration spring 80 differs from the first anti-vibration spring 80 in the embodiments in the following respects.

[0127] 15, the plate material 78H in this modified example has a different spacing between the first leg portions 86 than the plate material 78 in the embodiment. Therefore, the first vibration-proof spring 80 formed using the plate material 78H in this modified example has a plurality of first leg portions 86 arranged at uneven intervals in the circumferential direction.

[0128] 15 , the first legs 86 are arranged at uneven intervals in the circumferential direction, and as a result, the load that the multiple first legs 86 apply to the support member 64 is uneven in the circumferential direction. Therefore, with the first vibration-proof spring 80 in this modified example, the center of the support member 64 is displaced in the radial direction relative to the center of the first base 82. Furthermore, with the first vibration-proof spring 80 in this modified example, the valve body 62 is displaced in the radial direction in accordance with the support member 64.

[0129] Here, since the valve body 62 is a sphere, the actuating rod 70 is inclined in the vertical direction, and the actuating rod 70 is in strong partial contact with the inner peripheral surface of the through hole 34 of the valve body 20. In addition, as the valve body 62 is displaced in the radial direction, the radial center of the actuating rod 70 is shifted from the radial center of the valve body 62, and therefore the actuating rod 70 is in vertical line contact with the inner peripheral surface of the through hole 34 in the circumferential direction. In this way, when the center of the support member 64 is displaced in the radial direction with respect to the center of the first base portion 82, the sliding resistance of the actuating rod 70 against the through hole 34 increases, and the vibration-proof effect is improved. In addition, the expansion valve 10 molded using the first vibration-proof spring 80 in this modification can obtain the same action and effect as this embodiment or the first to seventh modifications of the expansion valve 10.

[0130] <Second Modification of the First Vibration-Isolating Spring 80> As shown in FIG. 16, the second modified example of the first vibration-proof spring 80 differs from the first vibration-proof spring 80 in the embodiment in the following respects.

[0131] As shown in Fig. 16, the plate material 78I in this modification has first legs 86I with different thicknesses (lengths in the width direction) compared to the plate material 78 in the embodiment. More specifically, in Fig. 16, the plate material 78 has first legs 86I1, 86I2, 86I3 with different thicknesses, with the first leg 86I1 being the thinnest and the first leg 86I3 being the thickest. Therefore, the first vibration-proof spring 80 formed using the plate material 78 in this modification has a plurality of first legs 86 with different thicknesses. Therefore, in this modification, as in the first modification of the first vibration-proof spring 80, the center of the support member 64 is displaced in the radial direction with respect to the center of the first base portion 82.

[0132] Therefore, the first vibration-proof spring 80 in this modified example can also provide the same actions and effects as the first modified example of the first vibration-proof spring 80, this embodiment, or the first to seventh modified examples of the expansion valve 10.

[0133] <Third Modification of the First Vibration-Isolating Spring 80> As shown in FIG. 17, the third modified example of the first vibration-proof spring 80 differs from the first vibration-proof spring 80 in the embodiment in the following respects.

[0134] As shown in Fig. 17, the first leg 86J of the plate material 78J in this modification has a portion with a different thickness (length in the horizontal width direction) within the range of the length in the vertical width direction compared to the plate material 78 of the embodiment. More specifically, in Fig. 17, the first leg 86J of the plate material 78J has a different thickness on the side closer to the first base 82 and on the side farther from the first base 82. Therefore, the first vibration-proof spring 80 formed using the plate material 78J in this modification has a plurality of first legs 86J with different thicknesses within the range of the length in the vertical direction. Therefore, in this modification as well, as in the first modification of the first vibration-proof spring 80, the center of the support member 64 is displaced in the radial direction with respect to the center of the first base 82.

[0135] Therefore, the first vibration-damping spring 80 in this modified example can also obtain the same action and effect as the first modified example, the second modified example, the present embodiment, or the first to seventh modified examples of the expansion valve 10.

[0136] The means for making the load applied to the support member 64 by the first leg 86 non-uniform in the circumferential direction and displacing the center of the support member 64 radially relative to the center of the first base 82 is not limited to the first to third modified examples of the first vibration-proof spring 80. For example, instead of arranging the multiple first leg portions 86 at unequal intervals in the circumferential direction, the degree (angle) of folding back of the first bent portion 84 may be made different. Even in this case, the center of the support member 64 can be displaced from the radial center of the first base 82 by the load applied to the support member 64 while keeping the circumferential intervals between the first leg portions 86 equal. And even in such a case, the same action and effect as the first to third modified examples of the first vibration-proof spring 80, the present embodiment, or the first to seventh modified examples of the expansion valve 10 described above can be obtained.

[0137] <Fourth Modification of the First Vibration-Isolating Spring 80> As shown in FIG. 18, the fourth modified example of the first vibration-proof spring 80 differs from the first vibration-proof spring 80 in the embodiment in the following respects.

[0138] 18(A), compared to the plate material 78 of the embodiment, the plate material 78K in this modified example has a protrusion 88K that protrudes toward the opposite side of the first leg portion 86 in the first base portion 82. More specifically, in FIG. 18, the plate material 78K has two protrusions 88K on one side of the first base portion 82 in the vertical width direction.

[0139] Furthermore, in the plate material 78 in this modified example, the protrusion 88K is bent in the direction opposite to the direction in which the first leg portion 86 is bent relative to the first base portion 82. Therefore, as shown in Fig. 18(B), the first vibration-proof spring 80K in this modified example has a protrusion 88K that protrudes radially outward.

[0140] Furthermore, a recess that is recessed radially outward is formed in the side wall surface 36S of the enlarged diameter portion 36 to which the first vibration-proof spring 80K according to this modification is attached, or in the side wall surface 40S of the valve chamber 40. The protrusion 88K of the first vibration-proof spring 80K according to this modification engages with the recess. Since the valve body 20 has a recess on its inner circumferential surface that engages with the protrusion 88K in this manner, the first vibration-proof spring 80K can be attached to the valve body 20.

[0141] Furthermore, with the expansion valve 10 of this modified example, the first vibration-damping spring 80K is prevented from coming off the side wall surface 40S of the valve chamber 40, compared to when the outer peripheral surface of the first base 82 of the first vibration-damping spring 80K and the inner peripheral surface of the valve body 20 are flat.

[0142] Furthermore, the first vibration-damping spring 80K in this modified example can also obtain the same actions and effects as the first to third modified examples of the first vibration-damping spring 80, this embodiment, or the first to seventh modified examples of the expansion valve 10.

[0143] In the above description of the fourth modified example of the first vibration-proof spring 80, the two protrusions 88K protrude radially outward from the first base portion 82, but this modified example is not limited to this. For example, the protrusions may be shaped to protrude radially inward from the side wall surface 36S of the enlarged diameter portion 36. In this case, the recess that engages with the protrusions is formed as a recess that recesses radially inward from the outer circumferential surface of the first base portion 82.

[0144] <Fifth Modification of the First Vibration-Isolating Spring 80> As shown in FIG. 19, the fifth modified example of a first vibration-proof spring 80L differs from the first vibration-proof spring 80 in the embodiment in the following respects.

[0145] As shown in Fig. 19(A), plate material 78L in this modified example has a different number of legs 86 compared to plate material 78 in the embodiment. More specifically, in Fig. 19(B), plate material 78L has five first legs 86. For this reason, in first vibration-proof spring 80L according to this modified example, as shown in Fig. 19(B), the circumferential interval at which the first legs 86 are arranged at equal intervals (72°) from one another is wider than the intervals between the first legs 86 according to the embodiment.

[0146] Furthermore, the expansion valve 10 molded using the first vibration-damping spring 80L in this modified example can obtain the same actions and effects as the first to third modified examples of the first vibration-damping spring 80, this embodiment, or the first to seventh modified examples of the expansion valve 10.

[0147] Furthermore, in this modified example as well, when the first legs 86 are arranged at equal intervals circumferentially as viewed from the support member 64, the load due to the first legs 86 is offset, so that the center of the support member 64 and the center of the first vibration-damping spring 80 can be aligned.

[0148] <Other Modifications> In the above description, the expansion valve 10 has two springs, the first vibration-proof spring 80 and the second vibration-proof spring 90, which respectively dampen the vibration of the support member 64 and the actuating rod 70, but the expansion valve 10 according to this embodiment is not limited to this. That is, the expansion valve 10 according to this embodiment may dampen the vibration of only the support member 64 using the first vibration-proof spring 80, or may dampen the vibration of only the actuating rod 70 using the second vibration-proof spring 90. Even in such a case, the effect of damping the vibration of only the actuating rod 70 or only the support member 64 can be obtained.

[0149] Also, in the above description, the anti-vibration springs 80, 90 have the bent portions 84, 94 as the anti-vibration portions 83, 93 that are bent at an angle exceeding 90°, but the anti-vibration springs 80, 90 according to the present embodiment are not limited to this. That is, the anti-vibration springs 80, 90 are bent radially inward from the base portions 82, 92, and as long as they are capable of applying force while sliding against the displacement portion to provide anti-vibration, the bending angle may be 90° or less. Even in such a case, the effect of anti-vibration of the operating rod 70 or the displacement portion can be obtained.

[0150] In the above description, the anti-vibration springs 80, 90 are formed by bending and processing the plate material 78, but the method of forming the anti-vibration springs 80, 90 according to this embodiment is not limited to this. For example, the anti-vibration springs 80, 90 may be formed by a processing method such as cutting a cylindrical material.

[0151] In the above description, the first leg 86 of the first vibration-proof spring 80 is in sliding contact with the support member 64, but the shape of the first vibration-proof spring 80 according to this embodiment is not limited to this. For example, the first leg 86 of the first vibration-proof spring 80 may be in sliding contact with the valve body 62 to dampen vibration of the valve body 62. In other words, the valve body 62 is also another example of an object to be damped.

[0152] In the above description, the valve body 62 of the first vibration-proof spring 80 is a sphere, but the shape of the valve body 62 according to this embodiment is not limited to this. For example, the shape of the valve body 62 may be a shape that extends in the vertical direction, such as a columnar or cone shape, or may be a shape that expands in the radial direction, such as a disk shape.

[0153] Furthermore, in the above description, the bases 82, 92 are cylindrical, but the shape of the anti-vibration springs 80, 90 according to this embodiment is not limited to this. For example, the shape of the bases 82, 92 may be appropriately set to a shape that fits closely with the side wall surface 40S or the side wall surface 36S, matching the shape of the inner circumferential surface of the valve chamber 40 or the inner circumferential surface of the enlarged diameter portion 36. In other words, it is preferable that the shape of the bases 82, 92 is a shape that matches the cross-sectional shape of the arrangement portion in which the anti-vibration springs 80, 90 are arranged.

[0154] In the above description, the bases 82, 92 are cylindrical, but they may have no ends in the circumferential direction (the circumferential ends are connected). That is, the vibration-proof springs 80, 90 in this embodiment may have a shape in which the circumferential ends of the bases 82, 92 are in contact with each other as shown in Fig. 4 when attached to the valve chamber 40 or the enlarged diameter portion 36, or the circumferential ends may be shaped to overlap in the radial direction.

[0155] In the above description, at least one of the anti-vibration springs 80, 90 is in sliding contact with the support member 64 or the actuation rod 70 as an example of a configuration in which the anti-vibration springs 80, 90 are in sliding contact with at least one of the valve body 62 and the displacement portion, but the expansion valve 10 according to this embodiment is not limited to this. That is, the first anti-vibration spring 80 and the second anti-vibration spring 90 may be configured to be in sliding contact with the support member 64 and the actuation rod 70, respectively, at the same time.

[0156] In addition, in other modified examples, the same configurations as the first to seventh modified examples of the expansion valve 10 or the first to fifth modified examples of the first vibration-proof spring 80 may be adopted.

[0157] The above describes an embodiment of the present disclosure with reference to the attached drawings. However, it is clear that a person with ordinary knowledge in the technical field to which the present disclosure pertains can conceive of various modifications or applications within the scope of the technical ideas described in the claims, and it is understood that these also naturally fall within the technical scope of the present disclosure. [Explanation of symbols]

[0158] 10 Expansion valve 20 Valve body 22 Inlet port 24 Exit Port 26 Return Passage 28 Power Element 30 Diaphragm 32 Stopper member 34 Through hole 36 Expanded diameter section (an example of a mounting target and placement section) 36B Bottom surface (example of the part to be struck) 36S Side wall surface (example of inner surface) 40 Valve chamber (an example of a mounting target and arrangement part) 40S Side wall surface (example of inner surface) 42 End face (example of abutted part) 44 Valve hole 44A aperture 46 Coil spring 48 Sealing member 62 Valve body (an example of an anti-vibration object) 64 Support member (an example of an anti-vibration target or displacing part) 70 Actuating rod (an example of an anti-vibration target) 72 Tapered section 74G protrusion 78 Board material 80, 90 Anti-vibration spring 82, 92 base 83, 93 Anti-vibration section 84, 94 Bend 85, 95 Sliding part 86, 96 legs 88K protrusion

Claims

1. a valve body having a valve chamber and a valve seat; a valve body disposed in the valve chamber and adapted to move toward and away from the valve seat; An actuating rod that transmits a driving force to the valve body; a vibration-isolating spring that is in sliding contact with a vibration-isolating target, which is at least one of the valve body and a displacement portion that displaces together with the valve body in a displacement direction; A power element provided in the valve body and driving the valve body via the actuation rod; Equipped with The valve body has an arrangement portion for arranging the vibration isolation target inside, The vibration-proof spring includes a base portion attached to an inner circumferential surface of the arrangement portion and a vibration-proof portion extending from the base portion, the vibration-proofing unit includes a sliding contact part that slidably contacts the vibration-proofing target and biases the vibration-proofing target, At least a part of one end of the vibration-proof part on the base side, at least a part of the portion of the vibration-proof part from the one end to the sliding contact portion, at least a part of the sliding contact portion, and the vibration-proof target are arranged in the following order in a direction from the one end to the vibration-proof target when viewed in the displacement direction: at least a part of the one end, at least a part of the portion from the one end to the sliding contact portion, at least a part of the sliding contact portion, and the vibration-proof target. Expansion valve.

2. The base portion is formed in a cylindrical shape, The vibration-proof portion is provided in a plurality of rows in the circumferential direction of the base portion. The expansion valve according to claim 1 .

3. the arrangement portion faces the base portion in the displacement direction and has an abutment portion with which the base portion can abut, the vibration-isolating portion is located on a side of the abutted portion across the sliding contact portion, the side of the abutted portion being closer to the vibration-isolating target than an opposite side of the abutted portion across the sliding contact portion; The expansion valve according to claim 1 .

4. one of the base portion and the inner circumferential surface of the arrangement portion has a protrusion protruding toward the other of the base portion and the inner circumferential surface of the arrangement portion; The other has a recess that engages with the protrusion. The expansion valve according to claim 1 .

5. The displacement portion is the actuation rod, The sliding contact portion is in sliding contact with the operating rod. The expansion valve according to claim 1 .

6. a support member disposed on the opposite side of the valve body from the valve seat and supporting the valve body; The support member is the displacement portion, The sliding contact portion is in sliding contact with the support member. The expansion valve according to claim 1 .

7. The vibration-proof spring is harder than the valve body. The expansion valve according to claim 1 .

8. A base portion that is attached to an inner peripheral surface of an attachment target; a vibration-isolating part including a sliding contact part extending from the base part and slidably contacting an object to be vibration-isolated to bias the object; Equipped with At least a part of one end of the vibration-proof part on the base side, at least a part of the portion of the vibration-proof part from the one end to the sliding contact portion, at least a part of the sliding contact portion, and the vibration-proof target are arranged in the following order in a direction from the one end to the vibration-proof target when viewed in the displacement direction of the vibration-proof target: at least a part of the one end, at least a part of the portion from the one end to the sliding contact portion, at least a part of the sliding contact portion, and the vibration-proof target. Anti-vibration spring.

Images