JP6929806B2 - Flow control valve and refrigeration cycle system - Google Patents

Description

The present invention relates to a flow control valve and a refrigeration cycle system.

Conventionally, an electric valve in which a cup-shaped throttle means having a plurality of small holes is inserted into a pipe is known in order to suppress the generation of flow noise when the refrigerant passes through the valve chamber (for example,). , Patent Document 1).

JP-A-2007-107623

In order to attach a cup-shaped rectifying member that suppresses the generation of flow noise to the horizontal joint, a valve seat is not provided unlike the lower joint side, so it is necessary to form a structure for attaching to the valve body. However, since it is not possible to form a structure for mounting on the valve body formed by pressing a thin plate or the like, it is said that a suitable position for mounting the rectifying member and the horizontal joint in the opening cannot be determined. There's a problem.

(1) According to the first aspect of the present invention, the flow control valve is formed of a thin plate and is provided with a housing provided with first and second openings serving as an inlet or outlet for a fluid, and inside the housing. A valve body provided and adjusting the opening area between the valve seat, a first pipe joint inserted into the first opening and communicating with the valve seat, and a housing inserted into the second opening. A second pipe joint that connects to the inside of the second pipe joint, a rectifying unit that is provided in the vicinity of the second opening and rectifies the fluid flowing through the second pipe joint, and the first rectifying unit inside the second pipe joint. and a holding portion for holding near side of the second opening, said second fitting has a first partial region having a first inner diameter in the vicinity of the second opening, inner diameter larger than the first inner diameter The holding portion holds the rectifying unit at the boundary between the first partial region and the second partial region, and the holding portion of the first partial region of the second pipe joint. The wall thickness is larger than the wall thickness of the second partial region, and the holding portion is a stepped portion formed by the difference between the wall thickness of the first partial region and the wall thickness of the second partial region. ..
(2) According to the second aspect of the present invention, the flow control valve is formed of a thin plate and is provided with a housing provided with first and second openings serving as an inlet or outlet for a fluid, and inside the housing. A valve body provided and adjusting the opening area with the valve seat, a first pipe joint provided in the first opening and communicating with the valve seat, and an inside of the housing provided in the second opening. A second pipe joint that connects to the second pipe joint, a rectifying unit that is provided in the vicinity of the second opening and rectifies the fluid flowing through the second pipe joint, and the second opening that rectifies the rectifying unit inside the second pipe joint. The second pipe joint includes a first partial region having a first inner diameter in the vicinity of the second opening and a first partial region having an inner diameter larger than the first inner diameter. It has two partial regions, the holding portion holds the rectifying portion at the boundary between the first partial region and the second partial region, and the inner diameter of the first partial region of the second pipe joint is the said. The holding portion is smaller than the inner diameter of the second partial region, and the holding portion is an inclined portion generated by the difference between the inner diameter of the first partial region and the inner diameter of the second partial region, and the first partial region is the second portion. It is a region on the second opening side of the partial region.
(3) According to the third aspect of the present invention, the flow control valve is formed of a thin plate and is provided with a housing provided with first and second openings serving as an inlet or outlet for fluid, and inside the housing. A valve body provided and adjusting the opening area with the valve seat, a first pipe joint provided in the first opening and communicating with the valve seat, and an inside of the housing provided in the second opening. A second pipe joint that connects to the second pipe joint, a rectifying unit that is provided in the vicinity of the second opening and rectifies the fluid flowing through the second pipe joint, and the second opening that rectifies the rectifying unit inside the second pipe joint. The area in the vicinity of the second opening of the second pipe joint includes a holding portion held in the vicinity of the second pipe joint and a pipe joint mounting member attached to the second opening and inserted into the second pipe joint. The holding portion covers the pipe joint mounting member, and is the end face of the pipe joint mounting member on the side to be inserted into the second pipe joint.
(4) According to the fourth aspect of the present invention, the flow control valve is formed of a thin plate and is provided with a housing provided with first and second openings serving as an inlet or outlet for a fluid, and inside the housing. A valve body provided and adjusting the opening area with the valve seat, a first pipe joint provided in the first opening and communicating with the valve seat, and an inside of the housing provided in the second opening. A second pipe joint that connects to the second pipe joint, a rectifying unit that is provided in the vicinity of the second opening and rectifies the fluid flowing through the second pipe joint, and the second opening that rectifies the rectifying unit inside the second pipe joint. The housing comprises a holding portion for holding in the vicinity of the second opening, the housing having a protruding portion protruding outward at the outer peripheral portion of the second opening, and the protruding portion is inserted into the second pipe joint. The region in the vicinity of the second opening of the second pipe joint covers the protruding portion, and the holding portion is an end face of the protruding portion.
(5) According to a fifth aspect of the present invention, the flow control valve is formed of a thin plate and is provided with a housing provided with first and second openings serving as an inlet or outlet for a fluid, and inside the housing. A valve body provided and adjusting the opening area with the valve seat, a first pipe joint provided in the first opening and communicating with the valve seat, and an inside of the housing provided in the second opening. A second pipe joint that connects to the second pipe joint, a rectifying unit that is provided in the vicinity of the second opening and rectifies the fluid flowing through the second pipe joint, and the second opening that rectifies the rectifying unit inside the second pipe joint. The holding portion is provided in the vicinity of the end face of the second pipe joint on the side to be inserted into the second opening, and the rectifying portion is integrated in the vicinity of the end face. Is formed in.
(6) According to the sixth aspect of the present invention, the refrigeration cycle system is vaporized with an expansion valve which is a flow control valve of any one of the first to fifth aspects, and an evaporator for vaporizing the fluid. A compressor for compressing the fluid and a condenser for liquefying the compressed fluid are provided.

According to the present invention, the rectifying portion that rectifies the fluid flowing through the second pipe joint is held inside the second pipe joint in the vicinity of the second opening provided in the housing formed of the thin plate. The second pipe joint and the straightening part can be easily attached to the second opening.

It is a figure which shows the outline of the structure of the flow rate control valve by 1st Embodiment of this invention. It is a figure which shows an example of the appearance of the 1st rectifying member and the 2nd rectifying member provided in the flow rate control valve by 1st Embodiment. It is a conceptual diagram which shows the refrigerant circuit of the refrigerating cycle system which uses the flow rate control valve as an expansion valve by this embodiment. It is a figure which shows an example of the appearance of the 1st rectifying member and the 2nd rectifying member in the modification. It is a figure which shows an example of the appearance of the 1st rectifying member and the 2nd rectifying member in the modification. It is a figure which shows an example of the appearance of the 1st rectifying member and the 2nd rectifying member in the modification. It is a figure which shows the outline of the structure of the flow rate control valve by 2nd Embodiment. It is a figure which shows the outline of the structure of the flow rate control valve by the 3rd Embodiment. It is a figure which shows an example of the appearance of the horizontal joint and the lower joint connected to the flow rate control valve by the 3rd Embodiment. It is a figure which shows the outline of the structure of the flow rate control valve by 4th Embodiment. It is a figure which shows the outline of the structure of the flow rate control valve by 5th Embodiment.

− First Embodiment −
The first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
FIG. 1 is a diagram showing an outline of a configuration of a flow rate control valve 1 according to the first embodiment of the present invention. For convenience of explanation, the coordinate system including the X-axis, the Y-axis, and the Z-axis is set in the vertical direction, the front-back direction, and the left-right direction of FIG. 1, respectively, as shown in the figure. The flow rate control valve 1 suppresses the inclination of the valve body 90 having the valve seat 20 and accommodating the valve member 55 and the valve body 10, the valve shaft 30 for driving the valve body 10 in the axial direction, and the valve shaft 30. It has a valve shaft holder 40 and a rotor 70 that moves the valve shaft 30 in the extending direction (X-axis direction, vertical direction in FIG. 1) of the valve shaft 30.

The valve member 55 has a valve spring 50, a spring receiver 51, and a valve guide 60 to which a valve body 10 is welded to an end portion. A male screw 31 is formed in at least a part of the peripheral surface located in the middle of both ends of the valve shaft 30. A female screw 41 is formed in at least one region of the surface of the valve shaft holder 40 facing the peripheral surface of the valve shaft 30. A valve guide accommodating chamber 45 for accommodating the valve guide 60 is formed inside the valve shaft holder 40. The screw feed mechanism 35 is formed by the male screw 31 of the valve shaft 30 and the female screw 41 of the valve shaft holder 40.

The valve member 55, the valve body 10, the valve shaft 30, the valve shaft holder 40, and the rotor 70 are housed in the case 80 and the valve body 90. In the present embodiment, the valve body 90 is a housing in which a valve chamber 901 for accommodating the valve body 10 is formed inside, for example, a thin plate made of stainless steel or the like having a uniform thickness. .. The valve body 90 is manufactured, for example, by pressing the plate-shaped member described above. As a result, the valve body 90 has a uniform thickness and rounded corners are formed. The valve body 90 is connected to a lower joint 3 described later to serve as a fluid inlet or outlet, and a second opening 91 connected to a horizontal joint 2 described later to serve as a fluid inlet or outlet. An opening 92 is formed. The valve guide 60 is guided to the valve guide accommodating chamber 45 of the valve shaft holder 40 together with the valve shaft 30 via the valve spring 50. The valve guide accommodating chamber 45 functions as a guide when the valve body 10 moves in the extending direction of the valve shaft 30 described above.

In the flow control valve 1 of FIG. 1, a stepping motor is composed of a rotor 70 and a stator 71 provided on the outside of the case 80. When this stepping motor is driven, the valve shaft 30 moves in the extending direction as the rotor 70 rotates, and this movement causes the valve body 10 to move in the extending direction of the valve shaft 30 together with the valve guide 60. The movement directions of the valve body 10 include a first movement direction (X-axis + direction, upward direction in FIG. 1) in which the separation distance between the valve body 10 and the valve seat 20 increases, and the valve body 10 and the valve seat 20. A second moving direction (X-axis − direction, downward direction in FIG. 1) in which the separation distance from and is reduced is included.
The present embodiment is not limited to the electric valve that moves the valve body 10 by driving the stepping motor, but may be an electromagnetic valve that moves the valve body 10 by driving the solenoid, or the valve body 10 according to the pressure. The valve body 10 may be moved by a pressure type drive in which the separation distance from the valve seat 20 changes, or the valve body 10 may be manually moved.

The state in which the valve body 10 is in contact with the valve seat 20 is referred to as a valve closed state. In the valve closed state, the flow path is blocked and no fluid flows out from the valve body 90. At this time, the separation distance between the valve body 10 and the valve seat 20 is zero or substantially zero. When the valve body 10 in the valve closed state moves in the first moving direction described above, the valve body 10 is separated from the valve seat 20. This state is called the valve opening state, and the first moving direction is called the valve opening direction. When the valve is opened, a gap is formed between the valve body 10 and the valve seat 20 to form a flow path. When the flow path is formed, the fluid flows out from the valve body 90. That is, the valve body 10 adjusts the opening area between the valve body 10 and the valve seat 20. A horizontal joint 2 having a first rectifying member 21 and a lower joint 3 having a second rectifying member 37 are connected to the valve body 90. In the valve open state, the fluid flows in from one of the horizontal joint 2 and the lower joint 3 and flows out to the other joint. The details of the horizontal joint 2, the lower joint 3, the first rectifying member 21, and the second rectifying member 37 will be described later.

When the valve body 10 in the valve open state moves in the second moving direction described above and the separation distance between the valve body 10 and the valve seat 20 decreases, the flow path narrows. When the valve body 10 comes into contact with the valve seat 20 and the valve is closed, the flow path is blocked and the fluid does not flow out from the valve body 90. Therefore, the second moving direction is called the valve closing direction.

Hereinafter, the horizontal joint 2, the lower joint 3, the first rectifying member 21, and the second rectifying member 37 in the present embodiment will be described. First, the horizontal joint 2 and the first rectifying member 21 will be described.
The horizontal joint 2 is a pipe joint having an outer diameter smaller than the opening diameter of the second opening 92, is inserted into the second opening 92, and is attached to the valve body 90 by brazing or the like. That is, the horizontal joint 2 is connected to the valve chamber 901 formed inside the valve body 90 via the second opening 92. When the horizontal joint 2 is attached to the second opening 92, the horizontal joint 2 is connected to the first partial region 201 in the vicinity of the second opening 92 and the first partial region 201 and is separated from the second opening 92 (Z-axis + direction). ) Extends with a second partial region 202.

The first partial region 201 and the second partial region 202 have different radial thicknesses from each other. The radial thickness (thickness) of the first partial region 201 is larger than the radial thickness (thickness) of the second partial region 202, that is, the inner diameter of the first partial region 201 is the second partial region. It is smaller than the inner diameter of 202. The horizontal joint 2 having such a structure can be formed by, for example, plastic working or cutting the wire rod. A step portion 203 is formed at the boundary between the first partial region 201 and the second partial region 202. FIG. 1 shows a case where the horizontal joint 2 is formed so that the step portion 203 is located near the outer surface (Z-axis + side surface) of the valve body 90 in the Z-axis direction, that is, near the second opening 92. Is shown as an example. The position of the step portion 203 in the Z-axis direction is not limited to the example shown in FIG. 1, and may be near the end of the horizontal joint 2 on the Z-axis side, or closer to the outer surface of the valve body 90. It may be on the Z-axis + side.

The step portion 203 is provided with a first rectifying member 21 having a diameter larger than the inner diameter of the first partial region 201, and is fixed by, for example, brazing or caulking. That is, the step portion 203 functions as a holding portion that holds the first rectifying member 21 in the vicinity of the second opening 92 inside the horizontal joint 2. As a result, the first rectifying member 21 is held at the boundary between the first partial region 201 and the second partial region 202. As described above, the step portion 203 is formed in the vicinity of the second opening 92, so that the first rectifying member 21 is provided in the vicinity of the second opening 92. In other words, the first rectifying member 21 is provided inside the horizontal joint 2.

FIG. 2 is an external view showing an example of the shape of the first rectifying member 21. FIG. 2A is an external perspective view of the first rectifying member 21, and FIG. 2B is a plan view in an XY plane. The first rectifying member 21 is formed by providing a plurality of through holes 211 in a thin disk-shaped main body 210. The diameter of the disk-shaped main body 210 is larger than the inner diameter of the first partial region 201 of the horizontal joint 2 and smaller than the inner diameter of the second partial region 202. As a result, the main body 210 can be fixed on the step 203. As the plurality of through holes 211, in the present embodiment, as an example, six through holes 211a, 211b, 211c, 211d, 211e, and 211f are provided as shown in FIG. The through hole 211a is formed around the central axis L of the main body 210. The through holes 211b to 211f are formed at equal intervals on a predetermined circumference centered on the central axis L. The inner diameters of the through holes 211a to 211f are formed so that the total opening area of the through holes 211a to 211f is smaller than the opening area of the first partial region 201 of the horizontal joint 2. When the total opening area of the plurality of through holes 211a to 211f is smaller than the opening area of the first partial region 201, the liquid phase refrigerant mixed with the vapor phase refrigerant as bubbles passes through the first rectifying member 21. It suppresses the growth of bubbles into large bubbles. As a result, when the liquid phase refrigerant flows from the horizontal joint 2 to the lower joint 3 via the valve chamber 901, large bubbles pass through the valve chamber 901, the gap between the valve body 10 and the valve seat 20, and the first opening 91. It is possible to suppress the generation of passing sound (cavitation noise) during the operation. Further, since it is suppressed that the bubbles grow and become large bubbles, even when the liquid phase refrigerant flows from the lower joint 3 to the horizontal joint 2 via the valve chamber 901, the bubbles flow to the valve chamber 901 and the second opening 92. It is possible to suppress the generation of noise generated by the large air bubbles colliding with the inner wall of the second partial region 202 and bursting when passing through.

In FIG. 2, the case where the number of through holes 211 is 6 is taken as an example, but 7 or more through holes 211 may be formed, or a plurality of through holes 211 of 5 or less may be formed. May be done. Further, the case where the through holes 211a are formed on the central axis L of the main body portion 211a and the through holes 211b to 211f are formed on a predetermined circumference about the central axis L at equal intervals has been described as an example. The arrangement of the plurality of through holes 211 is not limited to the above example. The number and arrangement of the through holes 211 may be an appropriate number and arrangement in order to suppress the generation of noise based on various measurements and experiments.

In the above-described embodiment, the case where the main body 210 of the first rectifying member 21 is a thin plate-shaped member has been described as an example. However, as shown in the external perspective view of FIG. 2C, the main body 210 may not be a thin plate-shaped member but a member having a predetermined thickness along the Z-axis direction. The thickness in the Z-axis direction may be set to a thickness suitable for suppressing the generation of noise based on various measurements, experiments, and the like.

Next, the lower joint 3 and the second rectifying member 37 will be described.
The lower joint 3 and the second rectifying member 37 have the same structure as the horizontal joint 2 and the first rectifying member 21. As shown in FIG. 1, the lower joint 3 is a pipe joint having a first partial region 301 and a second partial region 302 having different wall thicknesses and having an outer diameter smaller than the opening diameter of the first opening 91. .. The lower joint 3 is inserted into the first opening 91 and is attached to the valve body 90 by brazing or the like in a state of being in contact with the valve seat 20 at the end on the X-axis + side of the first partial region 301. The second rectifying member 37 is fixed at the step portion 303 between the first partial region 301 and the second partial region 302 by, for example, brazing or caulking. In the present embodiment, the description will be made with an example in which the lower joint 3 is attached to the valve body 90 in a state where the lower joint 3 is in contact with only the valve seat 20, but the lower joint 3 may communicate with the valve seat 20. For example, other configurations may be used. For example, the lower joint 3 may abut only on the valve body 90 without abuting on the valve seat 20. Alternatively, the lower joint 3 may be attached to the valve seat 20 and the valve body 90.

Similar to the first rectifying member 21 shown in FIG. 2, the second rectifying member 37 has a disk shape having a diameter larger than the inner diameter of the first partial region 301 of the lower joint 3 and smaller than the inner diameter of the second partial region 302. The main body 310 is formed by providing a plurality of through holes 311 (311a to 311f). As a result, also in the second rectifying member 37, it is possible to prevent the bubbles from growing into large bubbles due to the passage of the refrigerant through the plurality of through holes 311a to 311f. This makes it possible to suppress the generation of passing noise (cavitation noise) when large bubbles pass through the valve chamber 901, the gap between the valve body 10 and the valve seat 20, and the second opening 92.
In the second rectifying member 37, 7 or more through holes 311 may be formed, or 5 or less through holes 311 may be formed. Further, the positional relationship in which the through holes 311a and the through holes 311b to 311f are formed on the main body 301 is not limited to the example shown in FIG. That is, the number and arrangement of the through holes 311 may be an appropriate number and arrangement for suppressing the generation of noise based on various measurements and experiments.

FIG. 3 is a diagram illustrating a refrigerant circuit of the refrigeration cycle system 500 in which the flow rate control valve 1 according to the present embodiment is an expansion valve. The refrigeration cycle system 500 shown in FIG. 3 includes a flow control valve 1 which is an expansion valve, an evaporator (indoor heat exchanger) 4, a compressor 5, and a condenser (outdoor heat exchanger) 6. Refrigerant passages 501, 502, 503 and 504 connect these devices in sequence. The refrigerant, which is a liquid flowing out from the flow control valve 1 to the refrigerant passage 501, is vaporized by the evaporator 4. When the vaporized refrigerant is discharged from the evaporator 4, it flows through the refrigerant passage 502 and is compressed by the compressor 5. When the compressed refrigerant is discharged from the compressor 5, it flows through the refrigerant passage 503 and is liquefied by the condenser 6. The liquefied refrigerant flows out from the condenser 6 to the refrigerant passage 504, returns to the flow control valve 1 and flows in again. That is, the refrigerant circuit of the refrigeration cycle system 500 includes a flow control valve 1, an evaporator 4, a compressor 5, a condenser 6, and refrigerant passages 501 to 504 that loop connect these devices.

This freezing cycle system 500 is used in an air conditioner (cooling), a freezer / refrigerator, and the like. The configuration of the refrigeration cycle system to which the flow control valve 1 is applied as an expansion valve is not limited to the configuration of the basic refrigeration cycle system 500 shown in FIG. By incorporating a four-way valve, it can also be used as an air conditioner for cooling and heating that can reverse the flow direction of the refrigerant in the refrigerant circuit.

According to the first embodiment described above, the following effects can be obtained.
(1) A horizontal joint 2 formed of a thin plate and connected to the valve chamber 901 via a second opening 92 provided in the valve body 90 that houses the valve body 10 inside, and provided in the vicinity of the second opening 92. The first rectifying member 21 that rectifies the fluid flowing through the horizontal joint 2 and the stepped portion 203 that holds the first rectifying member 21 in the vicinity of the second opening 92 inside the horizontal joint 2 are provided.

In the valve body 90 formed by processing a thin plate, the wall thickness required for forming a stepped portion or the like for attaching a cup-shaped rectifying member as in the prior art cannot be obtained, so that the first rectifying member cannot be obtained. When the horizontal joint 2 to which the 21 is attached and the second opening 92 are attached, it becomes difficult to align the first rectifying member 21. When the second rectifying member 37 is positioned in the vicinity of the first opening 91, the valve seat 20 is provided at the back (X-axis + side) of the first opening 91, so that the second rectifying member 37 is inside. The position of the second rectifying member 37 can be aligned by fixing the lower joint 3 provided in the valve seat 20 with the valve seat 20. Since the member corresponding to the valve seat 20 is not provided in the vicinity of the second opening 92, the horizontal joint 2 in which the first rectifying member 21 is provided is said to be fixed by the member corresponding to the valve seat 20. Can't. On the other hand, in the present embodiment, since the first rectifying member 21 can be held inside the horizontal joint 2 by the stepped portion 203, the position of the first rectifying member 21 when the horizontal joint 2 is attached to the second opening 92. Easy to match. Therefore, even when the valve body 90 is formed by pressing a thin plate or the like, the first rectifying member 21 can be easily attached, so that the structure of the flow control valve 1 is simplified and quietness is maintained. It becomes possible to achieve both.

(2) The horizontal joint 2 has a first partial region 201 having a predetermined inner diameter in the vicinity of the second opening 92, and a second partial region 202 having an inner diameter larger than the inner diameter of the first partial region 201. The step portion 203 holds the first rectifying member 21 at the boundary between the first partial region 201 and the second partial region 202. As a result, the first rectifying member 21 can be easily attached to the inside of the horizontal joint 2.

(3) The wall thickness of the first partial region 201 of the horizontal joint 2 is larger than the wall thickness of the second partial region 202, and the first rectifying member 21 has the wall thickness of the first partial region 201 and the second partial region 202. It is held by the stepped portion 203 caused by the difference in wall thickness. As a result, the first rectifying member 21 can be easily attached to the inside of the horizontal joint 2.

(4) The first rectifying member 21 has a through hole 211 for the fluid to pass through, and the area of the through hole 211 is smaller than the area through which the fluid passes through the horizontal joint 2. As a result, when the liquid-phase refrigerant mixed with the vapor-phase refrigerant as bubbles passes through the first rectifying member 21, the bubbles are prevented from growing and becoming large bubbles. As a result, it is possible to suppress the generation of passing noise (cavitation noise) when large bubbles pass through the valve chamber 901.

(5) The refrigeration cycle system 500 includes an expansion valve, which is a flow control valve 1 according to the present embodiment, an evaporator 4 for vaporizing a liquid, a compressor 5 for compressing the vaporized fluid, and a liquefied fluid. It has a condenser 6 to be made to. The refrigeration cycle system 500 can maintain quietness by using the flow rate control valve 21 having the simple structure described above.

The above-described first embodiment can be modified as follows.
The first rectifying member 21 and the second rectifying member 37 are not limited to the shapes shown in FIG. An example is shown below with reference to the drawings. In the following description, the first rectifying member 21 will be taken as an example, but the same applies to the second rectifying member 37.
(Modified Example 1) FIG. 4 is an external view of the first rectifying member 21 in the modified example 1, FIG. 4 (a) is a perspective view, FIG. 4 (b) is a plan view in an XY plane, and FIG. 4 (c). Is a cross-sectional view in the ZX plane. The first rectifying member 21 is formed by providing one through hole 211 in a thin disk-shaped main body 210. The diameter of the disk-shaped main body 210 is larger than the inner diameter of the first partial region 201 of the horizontal joint 2 and smaller than the inner diameter of the second partial region 202. When the refrigerant passes through the through hole 211 having an inner diameter (opening area) smaller than the inner diameter (opening area) of the first partial region 201, it suppresses the growth of bubbles and becomes large bubbles, and noise is generated. Can be suppressed. The through hole 211 is not limited to the example formed around the central axis L of the main body 210, and the central axis L of the main body 210 and the central axis of the through hole 211 may be different.

In the above-described modification 1, the case where the main body 210 of the first rectifying member 21 is a thin plate-shaped member has been described as an example. However, as shown in the external perspective view of FIG. 4 (d) and the cross-sectional view of FIG. 4 (e) in the ZX plane, the main body 210 is not a thin plate-shaped member but has a predetermined thickness along the Z-axis direction. It may be a cylindrical member to have. The thickness in the Z-axis direction may be set to a thickness suitable for suppressing the generation of noise based on various measurements, experiments, and the like.

(Modification 2) FIG. 5 shows the appearance of the first rectifying member 21 in the modification 2, FIG. 5A is a perspective view, and FIG. 5B is a stepped portion 203 with the first rectifying member 21 attached. In this case, it is a top view in the XY plane when the first rectifying member 21 is viewed from the Z-axis − side. FIG. 5 (c) is a cross-sectional view on the ZX plane when the first rectifying member 21 is attached to the step portion 203, and FIG. 5 (d) is a YZ plane when the first rectifying member 21 is attached to the step portion 203. It is a cross-sectional view in. The first rectifying member 21 is a thin plate-shaped main body 210. The main body 210 in the second modification is formed by cutting out an end portion of the main body 210 in the first embodiment or the first modification. However, the through hole 211 shown in FIGS. 2 and 3 is not formed in the main body 210.

In the example shown in FIG. 5, an arc corresponding to the inner diameter of the second partial region 202 of the horizontal joint 2 connecting the linear sides 210a and 210b extending in the X-axis direction and the sides 210a and 210b on the X-axis + side. The main body 210 is formed in a plate shape having a surface surrounded by 210c and an arc 210d corresponding to the inner diameter of the second partial region 202 of the horizontal joint 2 connecting the side 210a and the side 210b on the X-axis-side. Will be done. That is, the main body 210 of this modification cuts out the vicinity of the Y-axis + side end portion and the vicinity of the Y-axis-side end portion of the disk-shaped main body 210 of the first embodiment and the modification 1. Is formed by. Since the distance connecting the arc 210c and the arc 210d through the central axis L is equal to the inner diameter of the second partial region 202 of the horizontal joint 2, the main body 210 has the arc 210c and the arc 210d inside the horizontal joint 2. It is fixed to the step portion 203. When the main body portion 210 is fixed to the stepped portion 203 as described above, the spaces S1 and S2 corresponding to the shape of the notched disc-shaped end portion between the main body portion 210 and the first partial region 201 of the horizontal joint 2 Occurs. The area of the spaces S1 and S2 is smaller than the area where the fluid passes through the second partial region 202 of the horizontal joint 2. Therefore, the refrigerant passes through the spaces S1 and S2, and it is possible to suppress the growth of bubbles to become large bubbles and suppress the generation of noise.

The area of the spaces S1 and S2, that is, the amount of the disc-shaped main body 210 notched at the end is set to a size suitable for suppressing the generation of noise based on various measurements and experiments. good.
Further, in the example shown in FIG. 5, the sides 210a and 210b are linear, but they do not have to be linear. Further, the main body 210 of the modified example 2 may also be provided with the through hole 211 illustrated in FIGS. 2 and 4.
The case where the main body 210 of the first rectifying member 21 is a thin plate-shaped member has been described as an example. However, as shown in the external perspective view of FIG. 5 (e), the main body 210 may not be a thin plate-shaped member but a member having a predetermined thickness along the Z-axis direction. The thickness in the Z-axis direction may be set to a thickness suitable for suppressing the generation of noise based on various measurements, experiments, and the like.

(Modification 3) FIG. 6 is an appearance of the first rectifying member 21 in the modification 3, FIG. 6A is a perspective view, and FIG. 6B is a stepped portion 203 with the first rectifying member 21 attached. In this case, the first rectifying member 21 is a plan view in the XY plane when viewed from the Z-axis − side, and FIG. 6 (c) shows the first rectifying member 21 in the ZX plane when the first rectifying member 21 is attached to the step portion 203. 1 It is an external view of a rectifying member 21. The first rectifying member 21 is a thin plate-shaped main body 210. The main body 210 in the third modification is formed by cutting out the end portion of the main body 210 in the first embodiment and the first modification, as in the case of the second modification. However, the through hole 211 shown in FIGS. 2 and 3 is not formed in the main body 210.

In FIG. 6, the main body 210 has a cross shape composed of a central body 241, a first main body 242, a second main body 243, a third main body 244, and a fourth main body 245. An example is shown in which a flat member having a flat surface is formed. The central portion 241 of the main body has a rectangular (for example, square) shaped plane centered on the central axis L of the horizontal joint 2. The first main body portion 242 is connected to the side 241a on the X-axis + side of the central portion 241 of the main body, and connects the side 241a, the linear sides 242a and 242b extending to the X-axis + side, and the sides 242a and 242b. It has a plane surrounded by an arc 242c corresponding to the inner diameter of the second partial region 202 of the horizontal joint 2. The second main body portion 243 is connected to the side 241b on the X-axis side of the central portion 241 of the main body, and connects the side 241b, the linear sides 243a and 243b extending to the X-axis-side, and the sides 243a and 243b. It has a plane surrounded by an arc 243c corresponding to the inner diameter of the second partial region 202 of the horizontal joint 2. The third main body portion 244 is connected to the side 241c on the Y-axis + side of the central portion 241 of the main body, and connects the side 241c, the linear sides 244a and 244b extending to the Y-axis + side, and the sides 244a and 244b. It has a plane surrounded by an arc 244c corresponding to the inner diameter of the second partial region 202 of the horizontal joint 2. The fourth main body portion 245 is connected to the side 241d on the Y-axis-side of the central portion 241 of the main body, and connects the side 241d, the linear sides 245a and 245b extending to the Y-axis-side, and the sides 245a and 245b. It has a plane surrounded by an arc 245c corresponding to the inner diameter of the second partial region 202 of the horizontal joint 2.

The distance connecting the arcs 242c and 243c through the central axis L is equal to the inner diameter of the second partial region 202 of the horizontal joint 2, and the distance connecting the arcs 244c and 245d through the central axis L is the second of the horizontal joint 2. Equal to the inner diameter of the partial region 202. Therefore, the main body 210 is fixed to the stepped portion 203 inside the horizontal joint 2 at arcs 242c, 243c, 244c and 245c. When the main body portion 210 is fixed to the stepped portion 203 as described above, spaces S10, S20, S30 and S40 are created between the main body portion 210 and the first partial region 201 of the horizontal joint 2. The area of the spaces S10, S20, S30, and S40 is smaller than the area where the fluid passes through the second partial region 202 of the horizontal joint 2. Therefore, the refrigerant passes through the spaces S10, S20, S30 and S40, and it is possible to suppress the growth of bubbles to become large bubbles and suppress the generation of noise.
The areas of the spaces S10, S20, S30 and S40 may be set to a size suitable for suppressing the generation of noise based on various measurements and experiments.
Further, in the example shown in FIG. 6, the sides 242a, 242b, 243a, 243b, 244a, 244b, 245a and 245b are linear, but may not be linear. Further, the main body 210 of the modified example 2 may also be provided with the through hole 211 illustrated in FIGS. 2 and 4.

In the above-described third modification, the case where the main body 210 of the first rectifying member 21 is a thin plate-shaped member has been described as an example. However, as shown in the external view on the ZX plane of FIG. 6D, the main body 210 may not be a thin plate-shaped member but a member having a predetermined thickness along the Z-axis direction. The thickness in the Z-axis direction may be set to a thickness suitable for suppressing the generation of noise based on various measurements, experiments, and the like.

(Modification Example 4) The first rectifying member 21 is a hollow cylindrical shape centered on the central axis L of the horizontal joint 2, has an average porosity of 100 μm to 500 μm, and has a known porosity of 50% or more. It may be a filter. Also in this case, the outer diameter of the first rectifying member 21 is formed to be equal to the inner diameter of the second partial region 202 of the horizontal joint 2, and is fixed to the step portion 203 by brazing, caulking, or the like. In the fourth modification, the first rectifying member 21 is not limited to the porous filter having a hollow cylindrical shape, and may have another shape. For example, a porous filter formed in a columnar shape having no hollow portion may be used.

In the above-described first embodiment and modification, the case where the first rectifying member 21 is provided in the horizontal joint 2 and the second rectifying member 37 is provided in the lower joint 3 has been described as an example. , The lower joint 3 may not be provided with the second rectifying member 37.

-Second embodiment-
The flow rate control valve according to the second embodiment of the present invention will be described. In the following description, the same components as those in the first embodiment are designated by the same reference numerals, and the differences will be mainly described. The points not particularly described are the same as those in the first embodiment. In the present embodiment, the shapes of the horizontal joint and the lower joint are different from those in the first embodiment.

FIG. 7 shows an outline of the configuration of the flow rate control valve 1 according to the second embodiment.
The horizontal joint 22 includes a first partial region 221 having an outer diameter smaller than the opening diameter of the second opening 92, a second partial region 222 having an inner diameter larger than the first partial region 221 and a first partial region 221. It is a pipe joint including a third partial region 223 that connects the second partial region 222. The horizontal joint 22 has a first partial region 221 inserted into the second opening 92 and is attached to the valve body 90 by brazing or the like. The horizontal joint 22 has a first partial region 221 and a second partial region 222 having different inner diameters, and a first A third partial region 223 connecting the partial region 221 and the second partial region 222 can be formed. The horizontal joint 22 may form the first partial region 221 and the second partial region 222 and the third partial region 223 described above by performing a pipe expansion treatment on the Z-axis + side. Since the horizontal joint 22 is manufactured by the above-mentioned contraction pipe treatment and pipe expansion treatment, the horizontal joint 22 has an inner diameter equal to the inner diameter of the first partial region 221 on the Z-axis − side of the third partial region 223, and has an inner diameter equal to the inner diameter of the first partial region 221 on the Z axis + side. It has an inner diameter equal to the inner diameter of the two partial regions 222. The third partial region 223 is an inclined portion whose inner diameter gradually increases from the − side to the + side of the Z axis. The second partial region 222 has a recess 224 formed in the vicinity of the connecting portion connected to the third partial region 223.

The first rectifying member 21 is the same as in the case of the first embodiment shown in FIG. That is, it is formed by providing a plurality of through holes 211 in the disk-shaped main body 210 having a diameter larger than the inner diameter of the first partial region 221 and smaller than the inner diameter of the second partial region 222. Therefore, the first rectifying member 21 is placed between the third partial region 223 and the recess 224, which has an inner diameter larger than the inner diameter of the first partial region 221 and smaller than the inner diameter of the second partial region 222, for example, by caulking or the like. It is fixed. That is, the third partial region 223 functions as a holding portion that holds the first rectifying member 21 in the vicinity of the second opening 92 inside the horizontal joint 22. As a result, the first rectifying member 21 is held at the boundary between the first partial region 221 and the second partial region 222.

As described above, since the horizontal joint 22 is attached by inserting the first partial region 221 into the second opening 92, the third partial region 223 is attached to the outer surface (Z) of the valve body 90 in the vicinity of the second opening 92. Axial + side). Therefore, the first rectifying member 21 is provided in the vicinity of the second opening 92. In other words, the first rectifying member 21 is provided inside the horizontal joint 22. As a result, also in the second embodiment, when the gas phase refrigerant is mixed in the liquid phase refrigerant as bubbles, the first rectifying member 21 grows bubbles and becomes large bubbles, which causes noise. It functions as a muffling part and a silent part to suppress.

The lower joint 32 has the same structure as the horizontal joint 22. The lower joint 32 includes a first partial region 321 having an outer diameter smaller than the opening diameter of the first opening 91, a second partial region 322 having an inner diameter larger than the first partial region 321 and a first partial region 321. It is a pipe joint including a third partial region 323 that connects the second partial region 322. The lower joint 32 is brazed in a state where the first partial region 321 is inserted into the first opening 91 and the end of the first partial region 321 on the X-axis + side is in contact with the valve seat 20 inside the valve body 90. It is attached to the valve body 90 by brazing or the like. As for the lower joint 32, the first partial region 321 and the second partial region 322 and the third partial region 323 are formed by the pipe reduction treatment and the pipe expansion treatment in the same manner as the horizontal joint 22. The second rectifying member 37 is fixed between the third partial region 323 and the recess 324 by, for example, caulking. In the present embodiment, an example in which the lower joint 32 is attached to the valve body 90 in a state where the lower joint 32 is in contact with only the valve seat 20 will be described. However, the lower joint 32 may communicate with the valve seat 20. For example, other configurations may be used. For example, the lower joint 32 may abut only on the valve body 90 without abuting on the valve seat 20. Alternatively, the lower joint 32 may be attached to the valve seat 20 and the valve body 90.

The second rectifying member 37 is a disk-shaped main body having a diameter larger than the inner diameter of the first partial region 321 and smaller than the inner diameter of the second partial region 322, similarly to the first rectifying member 21 provided in the horizontal joint 22. It is formed by providing the 310 with a plurality of through holes 311. As a result, also in the second embodiment, when the gas phase refrigerant is mixed in the liquid phase refrigerant as bubbles, the second rectifying member 37 grows bubbles and becomes large bubbles, which causes noise. It functions as a muffling part and a silent part to suppress.

Also in the second embodiment, the number and arrangement of the through holes 211 and 311 are not limited to the arrangement illustrated in FIG. 2, and in order to suppress the generation of noise based on various measurements and experiments. A suitable number and arrangement may be used. Further, as the first rectifying member 21 and the second rectifying member 37, the first rectifying member 21 and the second rectifying member 37 in the modified examples described with reference to FIGS. 4 to 6 may be used.
Further, in the second embodiment, the case where the first rectifying member 21 is provided in the horizontal joint 22 and the second rectifying member 37 is provided in the lower joint 32 has been described as an example, but the lower joint has been described. The second rectifying member 37 may not be provided on the 32.
Further, the flow rate control valve 1 according to the second embodiment described above can also be used as an expansion valve of the refrigeration cycle system 500 shown in FIG.

According to the second embodiment described above, in addition to the effects of (1), (2), (4), and (5) obtained by the first embodiment, the following effects are obtained. can get.
The inner diameter of the first partial region 221 of the horizontal joint 2 is smaller than the inner diameter of the second partial region 222, and the first rectifying member 21 includes the inner diameter and outer diameter of the first partial region 221 and the inner diameter of the second partial region 222. Is held in the third partial region 223, which is an inclined portion caused by the difference between the two. As a result, the first rectifying member 21 can be easily attached to the inside of the horizontal joint 2.

-Third embodiment-
The flow rate control valve according to the third embodiment of the present invention will be described. In the following description, the same components as those in the first embodiment are designated by the same reference numerals, and the differences will be mainly described. The points not particularly described are the same as those in the first embodiment. In the present embodiment, the shapes of the horizontal joint and the lower joint are different from those in the first embodiment.

FIG. 8 shows an outline of the configuration of the flow rate control valve 1 according to the third embodiment.
The horizontal joint 23 is a pipe joint having an outer diameter smaller than the opening diameter of the second opening 92, and the first rectifying portion is formed on the surface 230 of the end portion on the Z-axis side when attached to the second opening 92. 213 is formed. That is, since the first rectifying unit 213 is formed integrally with the horizontal joint 23, it is held by the horizontal joint 23. When the horizontal joint 23 is attached to the second opening 92, the first rectifying unit 213 projects into the valve chamber 901 inside the valve body 90. Therefore, the surface 230 of the horizontal joint 23 functions as a holding unit that holds the first rectifying unit 213 in the vicinity of the second opening 92 inside the horizontal joint 23. As a result, the first rectifying unit 213 is provided in the vicinity of the second opening 92.

FIG. 9 is a perspective view showing the appearance of the horizontal joint 23 when viewed from the surface 230 at the end on the Z-axis side. As described above, the first rectifying portion 213 having a plurality of through holes 211 is formed on the surface 230 of the end portion on the Z-axis side of the horizontal joint 23. The example of the first rectifying unit 213 shown in FIG. 9 has five through holes 211a to 211f, similarly to the first rectifying member 21 of the first embodiment shown in FIG. The through holes 211a are formed around the central axis L of the horizontal joint 23, and the through holes 211b to 211f are formed at equal intervals on a predetermined circumference centered on the central axis L. The total opening area of the through holes 211a to 211f is smaller than the opening area of the horizontal joint 23. As a result, even in the third embodiment, when the gas phase refrigerant is mixed in the liquid phase refrigerant as bubbles, the first rectifying unit 213 causes the bubbles to grow and become large bubbles, which causes noise. It functions as a muffling part and a silent part to suppress.

Like the horizontal joint 23, the lower joint 33 is a pipe joint having an outer diameter smaller than the opening diameter of the first opening 91, and is the surface of the end portion on the X-axis + side when attached to the first opening 91. At 330, it comes into contact with the valve seat 20. A second rectifying unit 331 is formed on the surface 330. That is, the second rectifying unit 331 is integrally formed with the lower joint 33. When the lower joint 33 is attached to the first opening 91, the second rectifying unit 311 comes into contact with the valve seat 20 inside the valve body 90. Therefore, the second rectifying unit 331 is provided in the vicinity of the first opening 91. In the present embodiment, the description will be made with an example in which the lower joint 33 is attached to the valve body 90 in a state where the lower joint 33 is in contact with only the valve seat 20, but the lower joint 33 may communicate with the valve seat 20. For example, other configurations may be used. For example, the lower joint 33 may abut only on the valve body 90 without abuting on the valve seat 20. Alternatively, the lower joint 33 may be attached to the valve seat 20 and the valve body 90.

The second rectifying unit 331 provided on the surface 330 of the end portion on the X-axis + side of the lower joint 33 has a plurality of through holes 311 like the first rectifying unit 213 provided on the horizontal joint 23 shown in FIG. (311a to 311f) are formed. As a result, even in the third embodiment, when the gas phase refrigerant is mixed in the liquid phase refrigerant as bubbles, the second rectifying unit 331 grows the bubbles to become large bubbles and cause noise. It functions as a muffling part and a silent part to suppress.

Also in the third embodiment, the number and arrangement of the through holes 211 and 311 are not limited to the arrangement illustrated in FIG. 9, and in order to suppress the generation of noise based on various measurements and experiments. A suitable number and arrangement may be used. Further, the first rectifying unit 213 and the second rectifying unit 331 may have the same shapes as the first rectifying member 21 and the second rectifying member 37 in the modified examples described with reference to FIGS. 4 to 6.
Further, the first rectifying unit 213 is not limited to the case where it is provided on the Z-axis-side surface 230 of the horizontal joint 23, and the position on the Z-axis + side by a predetermined distance from the Z-axis-side end of the horizontal joint 23. It may be provided in. Similarly, the second rectifying unit 331 is not limited to the case where it is provided on the surface 330 on the X-axis + side of the lower joint 33, and is on the X-axis-side by a predetermined distance from the end on the X-axis + side of the lower joint 33. It may be provided at a position.
Further, in the third embodiment and the modified example, the case where the horizontal joint 23 is provided with the first rectifying unit 213 and the lower joint 33 is provided with the second rectifying unit 331 has been described as an example. , The lower joint 32 may not be provided with the second rectifying unit 331.
Further, the flow rate control valve 1 according to the third embodiment described above can also be used as an expansion valve of the refrigeration cycle system 500 shown in FIG.

According to the third embodiment described above, in addition to the effects of (1), (4), and (5) obtained by the first embodiment, the following effects can be obtained.
The first rectifying unit 213 is integrally formed in the vicinity of the surface 230 on the side of the horizontal joint 2 to be inserted into the second opening 92. As a result, even when the valve body 90 is formed by processing a thin plate, it is possible to manufacture the flow control valve 1 having a simple structure and maintaining quietness.

− Fourth Embodiment −
The flow rate control valve according to the fourth embodiment of the present invention will be described. In the following description, the same components as those in the first embodiment are designated by the same reference numerals, and the differences will be mainly described. The points not particularly described are the same as those in the first embodiment. In the present embodiment, the structure for attaching the first rectifying member is different from that in the first embodiment.

FIG. 10 shows an outline of the configuration of the flow rate control valve 1 according to the fourth embodiment. 10 (a) is a cross-sectional view in the ZX plane, and FIG. 10 (b) is a cross-sectional view in the YZ plane. However, in FIG. 10B, the valve seat 20 and the valve body 10 are not shown.
The flow control valve 1 of the present embodiment has a pipe joint attachment member 840 for attaching the horizontal joint 24 to the second opening 92. The pipe joint mounting member 840 is a tubular member and has a first mounting area 841 and a second mounting area 842 having different outer diameters. The outer diameter of the first mounting area 841 is larger than the opening diameter of the second opening 92, and the outer diameter of the second mounting area 842 is smaller than the opening diameter of the second opening 92. The inner diameter of the first mounting region 841 and the inner diameter of the second mounting region 842 are equal to each other. That is, the radial thickness (wall thickness) of the first mounting region 841 is larger than the radial thickness (wall thickness) of the second mounting region 842.

The pipe joint mounting member 840 is mounted on the valve body 90 by inserting the second mounting region 842 into the second opening 92 from the inside (Z direction − side) of the valve chamber 901. At this time, the mounting surface 843, which is a step formed by the difference between the outer diameter of the first mounting region 841 and the outer diameter of the second mounting region 842, is the inner wall of the valve body 90, that is, the Z-axis − side shown in FIG. Contact the surface of. As shown in FIG. 10B, the cross section of the mounting surface 843 in the YZ plane is formed so as to have a cross-sectional shape of the inner wall of the valve body 90, that is, a shape corresponding to the circumferential shape. The pipe joint mounting member 840 is fixed to the valve body 90 by brazing or caulking on the mounting surface 843. As a result, the first mounting area 841 of the pipe joint mounting member 840 projects toward the valve chamber 901, and a part of the second mounting area 842 faces the outside of the valve body 90 (Z-axis + side in FIG. 10). Protrude.

The horizontal joint 24 is a pipe joint having an inner diameter larger than the outer diameter of the second mounting region 842, and has a first partial region 241 on the Z-axis − side and a second partial region 242 on the Z axis + side. The horizontal joint 24 is attached to the valve main body 90 by inserting a part of the second mounting area 842 projecting toward the outside of the valve main body 90 into the horizontal joint 24. At this time, the portion of the second mounting region 842 that protrudes from the valve body 90 to the Z-axis + side is covered by the first portion region 241 of the horizontal joint 24.

The first rectifying member 21 is formed by providing a plurality of through holes 211 in the disk-shaped main body 210, as in the case of the first embodiment shown in FIG. In the present embodiment, the diameter of the main body 210 of the first rectifying member 21 is larger than the inner diameter of the second mounting region 842 and smaller than the inner diameter of the horizontal joint 24. As a result, the first rectifying member 21 can be fixed on the end surface 844 on the Z-axis + side of the second mounting region 842 by brazing, caulking, or the like. That is, the end face 844 functions as a holding portion that holds the first rectifying member 21 in the vicinity of the second opening 92 inside the horizontal joint 24. As a result, the first rectifying member 21 is held at the boundary between the first partial region 241 and the second partial region 242. As a result, also in the fourth embodiment, when the gas phase refrigerant is mixed in the liquid phase refrigerant as bubbles, the first rectifying member 21 grows bubbles and becomes large bubbles, which causes noise. It functions as a muffling part and a silent part to suppress.

Also in the fourth embodiment, the number and arrangement of the through holes 211 are not limited to the arrangement illustrated in FIG. 2, and are suitable for suppressing the generation of noise based on various measurements, experiments, and the like. The number and arrangement may be used. Further, as the first rectifying member 21, the first rectifying member 21 in the modified example described with reference to FIGS. 4 to 6 may be used.
Further, in the fourth embodiment, the description is omitted assuming that the lower joint 3 and the second rectifying member 37 are the same as those in the first embodiment, but the lower joint 3 and the second rectifying member 37 are described in the second or third embodiment. The joints 32 and 33 and the second rectifying member 37 may be applied, or the lower joint 3 may not be provided with the second rectifying member 37.
Further, the flow rate control valve 1 according to the fourth embodiment described above can also be used as an expansion valve of the refrigeration cycle system 500 shown in FIG.

According to the fourth embodiment described above, in addition to the effects of (1), (2), (4), and (5) obtained by the first embodiment, the following effects are obtained. can get.
A pipe joint mounting member 840 attached to the second opening 92 and inserted into the horizontal joint 24 is further provided, the first partial region 241 of the horizontal joint 2 covers the pipe joint mounting member 840, and the first rectifying member 21 is a pipe. It is held by the end face 844 of the joint mounting member 840 on the side to be inserted into the horizontal joint 24. As a result, even if a complicated structure cannot be formed in the valve body 90 as in the valve body 90 formed by processing a thin plate, the first rectifying member 21 is provided inside the horizontal joint 2 with a simple structure. Can be provided.

-Fifth Embodiment-
The flow rate control valve according to the fifth embodiment of the present invention will be described. In the following description, the same components as those in the first embodiment are designated by the same reference numerals, and the differences will be mainly described. The points not particularly described are the same as those in the first embodiment. In the present embodiment, the structure for attaching the first rectifying member is different from that in the first embodiment.

FIG. 11 shows an outline of the flow rate control valve 1 according to the fifth embodiment.
The valve body 90 of the present embodiment has a protrusion 903 projecting on the Z-axis + side on the outer periphery of the second opening 92. The protrusion 903 is formed by, for example, burring. The protrusion 903 has a predetermined length along the Z-axis direction, and is formed in a tubular shape having the same inner diameter as the opening diameter of the second opening 92. The horizontal joint 25 is a pipe joint having an inner diameter larger than the outer diameter of the protrusion 903, and has a first partial region 251 on the Z-axis − side and a second partial region 252 on the Z axis + side. The horizontal joint 25 is attached to the valve body 90 by inserting the protrusion 903 into the horizontal joint 25. At this time, the protrusion 903 is covered with the first partial region 251 of the horizontal joint 25.

The first rectifying member 21 is formed by providing a plurality of through holes 211 in the disk-shaped main body 210, as in the case of the first embodiment shown in FIG. In the present embodiment, the diameter of the main body 210 of the first rectifying member 21 is larger than the inner diameter of the protrusion 903 and smaller than the inner diameter of the horizontal joint 25. As a result, the first rectifying member 21 can be fixed on the end surface 904 on the Z-axis + side of the protrusion 903 by brazing, caulking, or the like. That is, the end surface 904 of the protrusion 903 functions as a holding portion that holds the first rectifying member 21 in the vicinity of the second opening 92 inside the horizontal joint 25. As a result, the first rectifying member 21 is held at the boundary between the first partial region 251 and the second partial region 252. In other words, the first rectifying member 21 is provided inside the horizontal joint 25. As a result, also in the fifth embodiment, when the gas phase refrigerant is mixed in the liquid phase refrigerant as bubbles, the first rectifying member 21 grows bubbles and becomes large bubbles, which causes noise. It functions as a muffling part and a silent part to suppress.

Also in the fifth embodiment, the number and arrangement of the through holes 211 are not limited to the arrangement illustrated in FIG. 2, and are suitable for suppressing the generation of noise based on various measurements, experiments, and the like. The number and arrangement may be used. Further, as the first rectifying member 21, the first rectifying member 21 in the modified example described with reference to FIGS. 4 to 6 may be used.
Further, in the fifth embodiment, the description is omitted assuming that the lower joint 3 and the second rectifying member 37 are the same as those in the first embodiment, but the lower joint 3 and the second rectifying member 37 are described in the second or third embodiment. The joints 32 and 33 and the second rectifying member 37 may be applied, and the lower joint 3 may not be provided with the second rectifying member 37.
Further, the flow rate control valve 1 according to the fifth embodiment described above can also be used as an expansion valve of the refrigeration cycle system 500 shown in FIG.

According to the fifth embodiment described above, in addition to the effects of (1), (2), (4), and (5) obtained by the first embodiment, the following effects are obtained. can get.
The valve body 90 has a protrusion 903 that protrudes outward at the outer peripheral portion of the second opening 92, the protrusion 903 is inserted into the horizontal joint 25, and the first partial region 251 of the horizontal joint 25 is a protrusion. Covering the 903, the first rectifying member 21 is held by the end face 904 of the protrusion 903. As a result, even if a complicated structure cannot be formed in the valve body 90 as in the valve body 90 formed by processing a thin plate, the first rectifying member 21 is provided inside the horizontal joint 2 with a simple structure. Can be provided.

The present invention is not limited to the above-described embodiment as long as the features of the present invention are not impaired, and other embodiments considered within the scope of the technical idea of the present invention are also included within the scope of the present invention. ..

1 Flow control valves 2, 22, 23, 24, 25 Horizontal joints 3, 32, 33 Lower joints 4 Evaporator (indoor heat exchanger)
5 Compressor 6 Condenser (outdoor heat exchanger)
10 Valve body 20 Valve seat 21 First rectifying member 37 Second rectifying member 90 Valve body 91 First opening 92 Second opening 201, 221, 241 and 251 First partial area 202, 222, 242, 252 Second partial area 210 Main body 211 Through hole 213 First rectifying part 223 Third part area 301, 321 First part area 302, 322 Second part area 310 Main body part 311 Through hole 323 Third part area 331 Second rectifying part 500 Refrigeration cycle system 501 , 502, 503, 504 Refrigerant passage 840 Pipe fitting mounting member 844 End face 901 Valve chamber 903 Protrusion 904 End face

Claims (9)

A housing made of lamellae with first and second openings that serve as fluid inlets or outlets.
A valve body provided inside the housing and adjusting the opening area with the valve seat,
A first pipe joint inserted into the first opening and communicating with the valve seat,
A second pipe joint inserted into the second opening and connected to the inside of the housing,
A rectifying unit provided in the vicinity of the second opening and rectifying the fluid flowing through the second pipe joint,
And a holding portion for holding the rectifying portion in the vicinity side of the second opening of the inside of the second fitting,
The second pipe joint has a first partial region having a first inner diameter in the vicinity of the second opening and a second partial region having an inner diameter larger than the first inner diameter.
The holding unit holds the rectifying unit at the boundary between the first partial region and the second partial region.
The wall thickness of the first partial region of the second pipe joint is larger than the wall thickness of the second partial region.
The holding portion is a flow control valve which is a stepped portion formed by a difference between the wall thickness of the first partial region and the wall thickness of the second partial region. A housing made of lamellae with first and second openings that serve as fluid inlets or outlets.
A valve body provided inside the housing and adjusting the opening area with the valve seat,
A first pipe joint provided in the first opening and communicating with the valve seat,
A second pipe joint provided in the second opening and connected to the inside of the housing,
A rectifying unit provided in the vicinity of the second opening and rectifying the fluid flowing through the second pipe joint,
A holding portion for holding the rectifying portion in the vicinity of the second opening inside the second pipe joint is provided.
The second pipe joint has a first partial region having a first inner diameter in the vicinity of the second opening and a second partial region having an inner diameter larger than the first inner diameter.
The holding unit holds the rectifying unit at the boundary between the first partial region and the second partial region.
The inner diameter of the first partial region of the second pipe joint is smaller than the inner diameter of the second partial region.
The holding portion is an inclined portion generated by the difference between the inner diameter of the first partial region and the inner diameter of the second partial region.
The flow rate control valve in which the first partial region is a region on the second opening side of the second partial region. A housing made of lamellae with first and second openings that serve as fluid inlets or outlets.
A valve body provided inside the housing and adjusting the opening area with the valve seat,
A first pipe joint provided in the first opening and communicating with the valve seat,
A second pipe joint provided in the second opening and connected to the inside of the housing,
A rectifying unit provided in the vicinity of the second opening and rectifying the fluid flowing through the second pipe joint,
A holding portion that holds the rectifying portion in the vicinity of the second opening inside the second pipe joint, and a holding portion.
A pipe joint mounting member attached to the second opening and inserted into the second pipe joint is provided.
The area in the vicinity of the second opening of the second pipe joint covers the pipe joint mounting member.
The holding portion is a flow control valve which is an end surface of the pipe joint mounting member on the side to be inserted into the second pipe joint. A housing made of lamellae with first and second openings that serve as fluid inlets or outlets.
A valve body provided inside the housing and adjusting the opening area with the valve seat,
A first pipe joint provided in the first opening and communicating with the valve seat,
A second pipe joint provided in the second opening and connected to the inside of the housing,
A rectifying unit provided in the vicinity of the second opening and rectifying the fluid flowing through the second pipe joint,
A holding portion for holding the rectifying portion in the vicinity of the second opening inside the second pipe joint is provided.
The housing has a protruding portion that protrudes outward at the outer peripheral portion of the second opening.
The protrusion is inserted into the second pipe joint and
The area in the vicinity of the second opening of the second pipe joint covers the protrusion.
The holding portion is a flow control valve which is an end surface of the protruding portion. A housing made of lamellae with first and second openings that serve as fluid inlets or outlets.
A valve body provided inside the housing and adjusting the opening area with the valve seat,
A first pipe joint provided in the first opening and communicating with the valve seat,
A second pipe joint provided in the second opening and connected to the inside of the housing,
A rectifying unit provided in the vicinity of the second opening and rectifying the fluid flowing through the second pipe joint,
A holding portion for holding the rectifying portion in the vicinity of the second opening inside the second pipe joint is provided.
The holding portion is in the vicinity of the end face of the second pipe joint on the side inserted into the second opening, and the rectifying portion is a flow control valve integrally formed in the vicinity of the end face. The flow control valve according to any one of claims 1 to 5.
The rectifying portion has a penetrating portion through which the fluid passes, and the area of the penetrating portion is smaller than the area through which the fluid passes through the second pipe joint. In the flow control valve according to claim 6,
The rectifying unit is a flow control valve formed of a thin plate. In the flow control valve according to claim 6,
The rectifying unit is a flow control valve having a thickness along the direction in which the second pipe joint extends. The expansion valve, which is the flow control valve according to any one of claims 1 to 8,
An evaporator that vaporizes the fluid and
A compressor that compresses the vaporized fluid and
A refrigeration cycle system including a condenser for liquefying the compressed fluid.

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