JP2020056472A - Valve device, motor-operated valve and refrigeration cycle system - Google Patents

Abstract

To provide a valve device, a motor-operated valve and a refrigeration cycle system that can suppress the number of components and assembling work man-hours from increasing.SOLUTION: A motor-operated valve 10 comprises: a main valve body 2 which opens and closes a main valve port 14 of a main valve chamber 1C; a main valve spring 27 which energizes the main valve body 2 in a closing direction; a subordinate valve body 3 which changes opening of a subordinate valve port 24 provided to the main valve body 2; and a drive part 4 which drives the subordinate valve body 3 to move forward and backward along an axis L. The main valve body 2 has a valve body main part 2A which is formed in a hollow shape and circulates a fluid inside, a communication hole 25 which links the inside and outside of the valve body main part 2A, and a sound elimination member 2D which is provided covering the communication hole 25 and allows the fluid to pass through, and the sound elimination member 2D is made of an elastic body in such a shape that the sound elimination member can be fitted to the valve body main part 2A while receiving external force to elastically deform, and then retained by the valve body main part 2A in a restored state in which the sound elimination member is being put back into a natural state with the external force removed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a valve device, a motor-operated valve, and a refrigeration cycle system.

  2. Description of the Related Art Conventionally, as an electric valve (valve device) provided in a refrigeration cycle of an air conditioner, a small flow control area in which a sub-valve is driven forward and backward in an axial direction by an electric motor to control a flow at a sub-valve port of a main valve. A large flow rate control area in which a main valve port of a valve chamber is opened and closed by a main valve body to control flow rate has been proposed (see, for example, Patent Document 1).

  The motor-operated valve (flow regulating valve) described in Patent Literature 1 includes a main valve body (first valve body) that opens and closes a main valve port (first valve port) of a valve chamber and a main valve body in a closing direction. A main valve spring (compression coil spring), a sub-valve (second valve body) for opening and closing a sub-valve port (second valve port) formed in the main valve, and an electric motor for driving the sub-valve. A drive unit having a motor (stepping motor). In this electric valve, the main valve body biased by the main valve spring is seated to close the main valve port, and the sub-valve element driven forward and backward by the drive unit opens and closes the sub-valve port. That is, the sub-valve port is opened by pulling up the sub-valve by the drive unit, thereby controlling the small flow rate. Further, the pulled-up sub-valve engages with the main valve to raise the main valve. As a result, the main valve port is opened, thereby performing a large flow rate control.

  The main valve body described in Patent Literature 1 is formed in a hollow shape having a valve body member that can be seated or unseated on a main valve port, and a cylindrical interlocking member connected to the valve body member. In addition, first and second silence members made of a metal mesh are attached. The valve body member has a truncated conical surface portion seated on the main valve port, and a communication passage that is an opening communicating with the main valve port. The interlocking member has a cylindrical portion and a plurality of through holes penetrating the cylindrical portion. The first silencing member is formed in a cylindrical shape, is provided on the inner peripheral side of the cylindrical portion of the interlocking member, and is attached by being sandwiched between the interlocking member and the valve member. The second muffling member is formed in a disc shape and is provided in a communication passage of the valve body member, and is sandwiched between the valve body member and a pressing plate fixed to the valve body member from outside thereof. Installed with.

JP, 2017-211032, A

  However, in the conventional motor-operated valve as described in Patent Document 1, the main valve body is constituted by at least two members of the valve body member and the interlocking member, and is sandwiched between the valve body member and the interlocking member. The first muffling member is attached, and the second muffling member is attached by being clamped by a pressing plate fixed by caulking to the valve body member. Therefore, there are disadvantages that the number of parts of the main valve body increases and the number of man-hours for assembling the main valve body while attaching the muffling member increases.

  An object of the present invention is to provide a valve device, a motor-operated valve, and a refrigeration cycle system that can suppress an increase in the number of parts and assembly man-hours.

  The valve device of the present invention is a valve device provided with a valve element that opens and closes a valve port, wherein the valve element is formed in a hollow shape and allows a fluid to flow therein, and the valve element main part. A communication hole communicating between the inside and the outside of the portion, and a muffling member provided to cover the communication hole and allow fluid to pass therethrough, wherein the muffling member is made of an elastic body, and is elastically deformed by receiving an external force. The valve body has a shape attachable to the valve body main part in the deformed state, and is held by the valve body main part in a restored state in which an external force is removed and goes to a natural state.

  According to this aspect of the invention, the muffling member has a shape attachable to the valve body main portion in a deformed state elastically deformed by receiving an external force, and in a restored state in which the external force is removed and goes to a natural state. Since it is held by the valve body main part, the muffling member can be easily attached to the valve body main part, and the labor required for assembling the valve body can be reduced. Further, even if a structure in which the muffling member is sandwiched between predetermined portions of the valve body main portion or between two members is not adopted, the muffling member is held by the valve body main portion in the restored state. An increase in the number of parts can be suppressed. In addition, the restored state of the muffling member may be a state in which the elastically deformed deformed state returns to the natural state, that is, a state in which the valve body main part is pressed by the restoring force, or may return to the natural state. It may be in a state.

  At this time, the valve body main portion has a cylindrical portion, the communication hole is provided through the peripheral surface of the cylindrical portion, and the muffling member is formed in an annular shape, and the valve body main portion is formed. It is preferable to be held on the outer peripheral side or inner peripheral side of the portion.

  Here, the muffling member may be formed to have a dividing portion that divides a part in the circumferential direction, and may be configured to be elastically deformable in the radial direction by increasing or decreasing the width of the dividing portion. The silencing member may be formed of a stretchable polymer material, and may be configured to be elastically deformable in the radial direction by expanding and contracting, or the silencing member may be formed of a coil spring and twisted. It may be configured to be elastically deformable in the radial direction.

  According to such a configuration, for the valve body main portion having the cylindrical portion, while appropriately selecting the form and material of the muffling member attached to the outer peripheral side or the inner peripheral side thereof, and moving the muffling member in the radial direction. It can be easily elastically deformed and attached to the main part of the valve body, and the workability of the attaching work can be improved.

  Further, it is preferable that the valve body main portion is provided with a concave portion that receives and locks the muffling member.

  According to this configuration, the movement of the muffling member can be regulated by receiving and locking the muffling member in the concave portion of the valve body main portion, so that the muffling member due to vibration, fluid pressure, or the like during operation of the valve device. Can be prevented from being displaced.

  Further, it is preferable that the communication hole and the muffling member are provided via a gap.

  According to this configuration, since the gap exists between the communication hole and the noise reduction member, it is possible to prevent the communication hole from being blocked by a non-passing portion (a portion other than the portion through which the fluid passes) in the noise reduction member, An increase in flow path resistance in the valve device can be suppressed.

  An electric valve according to the present invention includes a main valve body that opens and closes a main valve port of a valve chamber, a main valve spring that urges the main valve body in a closing direction, and an opening of a sub-valve port provided in the main valve body. An electric valve comprising: a sub-valve for changing the degree; and a drive unit for driving the sub-valve to advance and retreat in the axial direction, wherein the sub-valve changes a degree of opening of the sub-valve port. A control area, and a large flow rate control area in which the main valve body opens and closes the main valve port. The flow rate control area has two stages, and the valve body main portion in any one of the valve devices and the communication hole And the sound deadening member, wherein the main valve body is constituted by the valve body having:

  According to the present invention as described above, similarly to the effect of the valve device described above, a two-stage that can reduce the labor required for assembling the main valve body while suppressing an increase in the number of parts of the main valve body. A motor-operated valve having a flow control region can be realized.

  The refrigeration cycle system of the present invention is a refrigeration cycle system including a compressor, a condenser, an expansion valve, and an evaporator, wherein any one of the valve devices is used as the expansion valve. It is characterized by.

  According to such a refrigeration cycle system, similarly to the effect of the valve device described above, the work required for assembling the valve body is reduced while suppressing an increase in the number of parts of the valve body, and silence is reduced by the noise reduction member. It is possible to realize an enhanced refrigeration cycle system.

  According to the valve device, the motor-operated valve, and the refrigeration cycle system of the present invention, it is possible to suppress an increase in the number of parts and the number of assembly operations.

It is a longitudinal section showing an electric valve of the present invention. It is a longitudinal section showing the important section of the above-mentioned electric valve on an enlarged scale. (A), (B) is a perspective view showing a muffling member in the electric valve. (A), (B) is a perspective view showing a modification of the muffling member. (A), (B) is a perspective view showing another modification of the muffling member. It is a longitudinal cross-sectional view which shows the attachment method of the silencing member in the said electric valve. It is a schematic structure figure showing the refrigeration cycle system of the present invention. It is a longitudinal cross-sectional view which expands and shows the principal part of the motor-operated valve which concerns on the modification of this invention. It is a longitudinal cross-sectional view which expands and shows the principal part of the motor-operated valve which concerns on another modification of this invention. It is a longitudinal cross-sectional view which expands and shows the principal part of the electrically operated valve which concerns on another modification of this invention.

  A motor-operated valve as a valve device according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the motor-operated valve 10 of the present embodiment includes a valve housing 1, a main valve body 2, a sub-valve body 3, and a drive unit 4. Note that the concept of “up and down” in the following description corresponds to the up and down in the drawing of FIG.

  The valve housing 1 has a cylindrical valve body 1A and a support member 1B fixed inside the valve body 1A. The valve body 1A has a cylindrical main valve chamber 1C formed therein, and the valve body 1A is provided with a primary joint pipe 11 through which a refrigerant flows from a side surface and communicates with the main valve chamber 1C. A secondary joint pipe 12 from which the refrigerant flows out from the side in communication with the main valve chamber 1C is attached. Further, in the valve body 1A, a main valve seat 13 is formed at a position where the main valve chamber 1C communicates with the secondary joint pipe 12, and a sectional shape from the main valve seat 13 to the secondary joint pipe 12 is formed. A circular main valve port 14 is formed. The support member 1B is welded and fixed to the valve body 1A by a metal fixing portion 15. The support member 1B is a resin molded product, and is provided on the main valve seat 13 side and has a cylindrical main valve guide portion 16 and a female screw portion provided on the drive portion 4 side and having an internal thread formed on an inner peripheral surface. 17 are formed. A case 18 is hermetically fixed to the upper end of the valve body 1A by welding or the like.

  As shown in FIG. 2, the main valve body 2 includes a valve body main portion 2A having a main valve portion 21 that is seated or unseated on the main valve seat 13, a spring receiving portion 2B, and a sub-valve seat 2C. , A noise reduction member 2D. The valve body main portion 2A includes a cylindrical cylindrical portion 22 having an axis L as an axial direction, a sub-valve chamber 23 formed inside the cylindrical portion 22 and through which fluid flows, and a sub-valve seat along the axis L. And a sub-valve port 24 passing through 2C. A plurality of communication holes 25 are formed in the peripheral surface of the cylindrical portion 22, and the sub-valve chamber 23 communicates with the main valve chamber 1 </ b> C through the communication hole 25. An insertion hole 26 is formed along the axis L on the inner peripheral surface of the cylindrical portion 22 of the valve body main portion 2A, and the sub-valve base 3A of the sub-valve 3 is inserted into the insertion hole 26. The spring receiving portion 2B is formed in an annular shape and fixed to the upper end of the valve body main portion 2A, and the rotor shaft 46 is inserted therein. A main valve spring 27 is disposed between the upper surface of the spring receiving portion 2B and the ceiling surface of the support member 1B, and the main valve body 2 is moved by the main valve spring 27 in the main valve seat 13 direction (closing direction). Has been energized.

  The sub-valve element 3 includes a cylindrical sub-valve base 3A, a sub-valve 3B protruding downward from the sub-valve base 3A, a thrust washer 3C provided above the sub-valve base 3A, and a sub-valve base 3A. And a sub-valve spring (not shown) provided inside. The sub-valve base 3 </ b> A is inserted into the insertion hole 26 of the main valve body 2, and is supported so as to be movable up and down along the axis L and rotatable around the axis L. The thrust washer 3C can contact the upper surface of the sub-valve base 3A and the lower surface of the spring receiving portion 2B, so that the frictional force between the contact surfaces is extremely small. An insertion hole is provided in the upper portion of the sub-valve base 3A, through which the rotor shaft 46 is inserted. A sub-valve joined to the flange (not shown) formed at the lower end of the rotor shaft 46 and the bottom of the sub-valve base 3A. A sub-valve spring is arranged between the upper end of the portion 3B. The sub-valve body 3 is biased toward the sub-valve seat 2C (close direction) with respect to the rotor shaft 46 (magnet rotor 44) by the sub-valve spring. The sub-valve base 3A may be formed integrally with the rotor shaft 46 and the sub-valve 3B. In that case, the sub-valve base 3A may be formed in a solid shape, and the sub-valve spring may be omitted. .

  The drive unit 4 includes a stepping motor 41 as an electric motor, a screw feed mechanism 42 for moving the sub-valve 3 forward and backward by the rotation of the stepping motor 41, and a stopper mechanism 43 for restricting the rotation of the stepping motor 41. The stepping motor 41 includes a magnet rotor 44 whose outer peripheral portion is magnetized to have multiple poles, a stator coil 45 disposed on the outer periphery of the case 15, and a rotor shaft 46 fixed to the magnet rotor 44. . The rotor shaft 46 is fixed to the magnet rotor 44 via a fixing member 46 a and extends along the axis L, and its upper end is inserted into the guide 47 of the stopper mechanism 43. A male screw portion 46b is integrally formed at an intermediate portion of the rotor shaft 46, and the male screw portion 46b is screwed with the female screw portion 17 of the support member 1B, thereby forming a screw feed mechanism 42. When the magnet rotor 44 rotates, the male screw portion 46b of the rotor shaft 46 is guided by the female screw portion 17, so that the magnet rotor 44 and the rotor shaft 46 advance and retreat in the direction of the axis L, and accordingly, the sub-valve 3 also moves. It rises or descends along the axis L.

  The stopper mechanism 43 includes a cylindrical guide 47 suspended from the ceiling of the case 18, a guide wire 48 fixed to an outer periphery of the guide 47, and a movable and rotatable and vertically movable guide guided by the guide wire 48. A slider 49. The movable slider 49 is provided with a claw portion 49a protruding radially outward, and the magnet rotor 44 is provided with an extension portion 44a extending upward and abutting on the claw portion 49a, and is extended when the magnet rotor 44 rotates. When the portion 44a pushes the claw portion 49a, the movable slider 49 rotates and moves up and down following the guide wire 48. The guide wire 48 has an upper end stopper 48a that defines the uppermost position of the magnet rotor 44 and a lower end stopper 48b that defines the lowermost position of the magnet rotor 44. When the movable slider 50 comes into contact with the upper end stopper 48a and the lower end stopper 48b, the rotation of the movable slider 49 is stopped, whereby the rotation of the magnet rotor 44 is restricted, and the ascent or descent of the sub valve body 3 is also stopped. You.

  Next, the configuration of the valve body main portion 2A of the main valve body 2 and the muffling member 2D will be described with reference to FIGS. On the outer peripheral surface of the cylindrical portion 22 of the valve body main portion 2A, a concave portion 28 that is recessed radially inward over the upper and lower sides of the communication hole 25 is formed continuously over the entire circumference. As shown in FIGS. 3 to 5, the muffling member 2 </ b> D is formed in an entire annular shape, is fitted and locked in the recess 28, and is provided so as to cover the outside of the communication hole 25. The concave portion 28 is formed in a two-step shape from the outer peripheral surface of the cylindrical portion 22, and the first step portion 28 a on the outer peripheral surface has a width dimension in the up-down direction (direction of the axis L) of the height of the muffling member 2 </ b> D. The width of the second step 28b is slightly smaller than the height of the muffling member 2D. As a result, the silencing member 2D is locked to the first step 28a, and a gap is formed between the silencing member 2D and the communication hole 25 according to the step size of the second step 28b. . The outer surface of the silencing member 2D is located radially inward of the outer peripheral surface of the cylindrical portion 22, and the silencing member 2D slides on the main valve guide portion 16 of the support member 1B when the main valve body 2 moves forward and backward. Not to touch.

  As shown in FIGS. 3 to 5, the muffling member 2 </ b> D is configured by an annular plate material 29 which is formed in an annular shape from a thin plate material such as a metal or a resin which is an elastic body having spring properties. The muffling member 2D is formed to have a plurality of through holes 29a that penetrate the annular plate member 29 in the radial direction and allow fluid to pass therethrough, and a dividing portion 29b that divides a part of the annular plate member 29 in the circumferential direction. I have. Such a silencing member 2D is configured to be elastically deformable in the radial direction by increasing or decreasing the width of the dividing portion 29b by receiving an external force, and the width of the dividing portion 29b is increased by receiving the external force outward in the radial direction. Then, the inner diameter becomes a deformed state in which the inner diameter is enlarged, and the external force is removed to restore the natural state shown in FIGS.

  As shown in FIG. 3 (A), the plurality of through holes 29a can be exemplified by one in which relatively large circular holes are vertically arranged in two stages and at predetermined intervals in the circumferential direction. Further, as shown in FIG. 3B, the plurality of through-holes 29a may be formed by arranging relatively small circular holes continuously in the circumferential direction in a three-tiered upper and lower staggered manner. In the noise reduction member 2D of the present embodiment shown in FIG. 3, the opening area of each through hole 29a is smaller than, for example, the opening area of each communication hole 25, and the total opening area of the plurality of through holes 29a is Are set to be larger than the total opening area of the communication holes 25. The relationship between the opening area of the through hole 29a and the opening area of the communication hole 25 can be arbitrarily set, and the opening area of each through hole 29a is set to be larger than the opening area of each communication hole 25. Alternatively, the total opening area of the plurality of through holes 29a may be set smaller than the total opening area of the plurality of communication holes 25. Further, as shown in FIG. 4A, the plurality of through holes 29a may be formed by arranging horizontally long slit-shaped long holes along the circumferential direction in two stages vertically and at predetermined intervals in the circumferential direction. Alternatively, as shown in FIG. 4 (B), vertically long slit-shaped long holes along the vertical direction (the direction of the axis L) may be arranged at predetermined intervals in the circumferential direction.

  As shown in FIGS. 3 and 4, the dividing portion 29b may be formed by dividing a part of the annular plate material 29 in a straight line in the vertical direction, or as shown in FIG. The portion may be divided vertically in the shape of a crank, or as shown in FIG. 5B, a portion of the annular plate 29 may be divided linearly in a direction inclined with respect to the vertical direction. Good. As described above, the shape of the dividing portion 29b is not particularly limited, and any shape can be adopted as long as the annular plate member 29 is deformed radially outward.

  The silencing member 2D as described above is attached to the valve body main portion 2A of the main valve body 2 as shown in FIG. First, after inserting the sub-valve 3 and the rotor shaft 46 into the insertion hole 26 inside the valve main part 2A, the spring receiving part 2B is fixed to the upper end of the valve main part 2A. The body 2, the sub-valve body 3 and the rotor shaft 46 are assembled. Here, the magnet rotor 44 is not fixed to the rotor shaft 46. Next, the noise reduction member 2D is inserted through the rotor shaft 46, an external force is applied radially outward to the noise reduction member 2D, the inner diameter of the noise reduction member 2D is enlarged to be deformed, and then the noise reduction member 2D is moved downward, and is then moved downward. Then, the muffling member 2D is inserted through the cylindrical portion 22 of the valve body main portion 2A. When the noise reduction member 2D reaches the concave portion 28, the external force is released, so that the noise reduction member 2D is restored toward the natural state by the restoring force of the annular plate member 29. In this restored state, the inner peripheral surface of the annular plate member 29 is Abuts against the first step 28 a, whereby the muffling member 2 </ b> D is held in the recess 28.

  At this time, it is preferable that the inner diameter of the annular plate member 29 in the natural state is formed to be slightly smaller than the outer diameter of the first step portion 28 a of the concave portion 28. According to this, while the sound absorbing member 2D does not return to the natural state and retains the restoring force, the sound absorbing member 2D is mounted in a state where the inner peripheral surface of the annular plate member 29 presses the first step 28a by the restoring force. Can be Therefore, the silencing member 2D does not rattle with respect to the valve body main portion 2A, and furthermore, the silencing member 2D does not vibrate up and down or rotate in the circumferential direction against fluid pressure or the like during valve operation. This makes it possible to stabilize the mounting state of the sound deadening member 2D with respect to the valve body main portion 2A and suppress the generation of abnormal noise. On the other hand, the muffling member 2D may return to the natural state and be held in the recess 28. In this case, the inner diameter of the annular plate 29 in the natural state is substantially the same as the outer diameter of the first step 28a of the recess 28. If so, the silencing member 2D can be attached to the valve body main portion 2A without play. Further, after attaching the muffling member 2D, the muffling member 2D may be fixed using a restricting member or the like that makes it immovable with respect to the valve body main portion 2A.

  The above-described motor-operated valve 10 operates as follows. First, in the state of FIG. 1, the main valve portion 21 of the main valve body 2 is seated on the main valve seat 13 and the main valve port 14 is closed. On the other hand, the sub-valve 3 at the position closest to the sub-valve port 24 does not sit on the sub-valve seat 2C, and the outer peripheral surface of the sub-valve portion 3B of the sub-valve 3 and the inner peripheral surface of the sub-valve port 24 The flow path is formed by the gap. Therefore, the refrigerant (fluid) flowing from the primary joint pipe 11 into the main valve chamber 1C passes through the through-hole 29a of the silencing member 2D, then passes through the communication hole 25 of the valve body main portion 2A, and enters the sub-valve chamber 23. Inflow. The refrigerant flowing into the sub-valve chamber 23 flows below the main valve portion 21 through a gap between the sub-valve portion 3B and the sub-valve port 24, and flows out from the main valve port 14 toward the secondary joint pipe 12. That is, even if the valve opening is zero, a minute flow rate is generated. At such a minute flow rate, a passing sound (abnormal noise) of the refrigerant passing through the gap between the sub-valve portion 3B and the sub-valve port 24 may occur, but the communication hole 25 is covered with the muffling member 2D. Thus, leakage of abnormal noise to the outside can be suppressed.

  Next, by driving the stepping motor 41 of the drive unit 4 and rotating the magnet rotor 44 to raise the sub-valve 3, the sub-valve 3 B of the sub-valve 3 comes out of the sub-valve port 24, and the sub-valve 3 The flow path due to the gap between the portion 3B and the sub-valve port 24 is enlarged, and the flow rate gradually increases. At this time, since the main valve portion 21 of the main valve body 2 remains seated on the main valve seat 13, the increase in the flow rate is small. Thus, the control range in which the opening of the sub-valve 3 is changed while the main valve 2 is closed is the small flow control range. Next, when the sub-valve 3 is further raised, the thrust washer 3C comes into contact with the spring receiving portion 2B, the main valve 2 is pulled up by the sub-valve 3, and the main valve portion 21 is separated from the main valve seat 13. I do. The control area for raising the main valve element 2 from the seating position (closed position) toward the valve open position (open position) is the large flow control area, and the opening of the main valve element 2 in this large flow control area is performed. The change in the flow rate with respect to the degree (the rotation amount of the stepping motor 41 = the valve lift amount) becomes large, and the flow rate becomes maximum when the main valve body 2 is fully opened.

  According to the above-described embodiment, the muffling member 2D has a shape attachable to the valve body main portion 2A in a deformed state in which the muffling member 2D is elastically deformed by receiving an external force. In this state, the muffler 2D is held by the valve body main portion 2A, so that the muffling member 2D can be easily attached to the valve body main portion 2A, and the labor required for assembling the main valve body 2 can be reduced. Further, even if a structure in which the silencing member 2D is sandwiched between predetermined portions of the valve body main portion 2A or between two members is not adopted, the silencing member 2D is held by the valve body main portion 2A in the restored state. Thus, an increase in the number of parts of the main valve body 2 can be suppressed.

  Further, by attaching an annular silencing member 2D to the outer peripheral side of the valve body main portion 2A having the cylindrical portion 22, the silencing member 2D is elastically deformed radially outward so that the valve body main portion 2A is deformed. Can be easily mounted, and the workability of the mounting operation can be improved.

  Further, the valve body main portion 2A has a concave portion 28 for receiving the silencing member 2D, and by receiving and locking the silencing member 2D in the concave portion 28, the movement of the silencing member 2D can be regulated. It is possible to prevent displacement of the silencing member 2D due to vibration, fluid pressure, or the like during the operation of the ten.

  In addition, since there is a gap between the communication hole 25 of the valve body main portion 2A and the muffling member 2D, the communication hole 25 may be blocked by a portion of the muffling member 2D where the through-hole 29a of the annular plate 29 is not provided. Thus, it is possible to suppress an increase in flow path resistance in the motor-operated valve 10.

  Next, a refrigeration cycle system of the present invention will be described with reference to FIG. The refrigeration cycle system 90 is used for an air conditioner such as a home air conditioner, for example. The motor-operated valve 10 of the embodiment is provided between the first indoor heat exchanger 91 (operating as a dehumidifying cooler) and the second indoor heat exchanger 92 (operating as a dehumidifying heater) of the air conditioner. The heat pump refrigerating cycle is provided together with the compressor 93, the four-way valve 94, the outdoor heat exchanger 95, and the electronic expansion valve 96. The first indoor heat exchanger 91, the second indoor heat exchanger 92, and the electric valve 10 are installed indoors, and the compressor 93, the four-way valve 94, the outdoor heat exchanger 95, and the electronic expansion valve 96 are installed outdoor. It constitutes a cooling and heating system.

  The present invention is not limited to the above-described embodiment, but includes other configurations and the like that can achieve the object of the present invention, and includes the following modifications and the like. For example, in the embodiment, the motor-operated valve 10 used for an air conditioner such as a home air conditioner is illustrated. However, the motor-operated valve of the present invention is not limited to a home air conditioner, and may be a commercial air conditioner. The present invention can be applied not only to the air conditioner but also to various types of refrigerators and the like. Further, in the above-described embodiment, the description has been made that the refrigerant flows in from the primary joint pipe 11 and flows out from the secondary joint pipe 12, but the present invention is not limited to this one-way flow, and the flow is The present invention is also applicable to a case where the refrigerant flows in from the secondary joint pipe 12 and flows out of the primary joint pipe 11, and in particular, the backflow may be performed in a fully opened state.

  Further, in the above-described embodiment, the muffling member 2D is provided with the through-hole 29a and the dividing portion 29b in the annular plate member 29 formed in an annular shape, and is held on the outer peripheral side of the valve body main portion 2A of the main valve body 2. However, the muffling member may have a member shape and a mounting form as shown in FIGS. 8 to 10 are enlarged longitudinal sectional views each showing a main part of a motor-operated valve according to a modification of the present invention.

  In the motor-operated valve 10 shown in FIG. 8, the silencing member 2E is a coil spring 51 spirally formed from a wire, such as a metal or resin, which is an elastic body having spring properties, and is an outer peripheral side of the valve body main portion 2A. Is held in the concave portion 28 formed in the first portion. In the silencing member 2E, a gap 51a is formed between the wires of the coil spring 51, and a fluid can pass through the gap 51a. As a procedure for attaching the muffling member 2E to the valve body main portion 2A, an external force that twists the coil spring 51 so as to expand the inner diameter is elastically deformed, and the cylinder of the valve body main portion 2A is attached to the coil spring 51 having the expanded inner diameter. The part 22 is inserted. When the coil spring 51 reaches the concave portion 28, the external force is released, so that the coil spring 51 is restored toward the natural state by the restoring force, and the muffling member 2E is held in the concave portion 28 in this restored state.

  In the motor-operated valve 10 shown in FIGS. 9 and 10, the valve body main portion 2A of the main valve body 2 has a concave portion 28 formed on the inner peripheral surface of the cylindrical portion 22, and the concave portion 28 holds the sound deadening members 2F and 2G. ing. The noise reduction member 2F shown in FIG. 9 has a through hole 29a and a dividing portion 29b (see FIG. 3 and the like) provided in the annular plate member 29 in the same manner as the noise reduction member 2D of the above-described embodiment. By receiving the force, the width of the dividing portion 29b is reduced and the inner diameter is reduced to a deformed state, and the external force is removed to restore the natural state. The muffling member 2G shown in FIG. 10 includes a coil spring 51 similarly to the muffling member 2E shown in FIG. 8, and is deformed by receiving an external force that is twisted so that the inner diameter of the coil spring 51 is reduced. It restores to the natural state. These muffling members 2F and 2G are inserted inside the cylindrical portion 22 in a deformed state in which the inner diameter is reduced by an external force, and when they reach the concave portion 28, the external force is released to restore to a natural state. At the concave portion 28.

  Further, in the above-described embodiment, the silencing member 2D is configured such that the annular plate member 29 is provided with the dividing portion 29b and is capable of being elastically deformed in the radial direction by increasing or decreasing the width of the dividing portion 29b. The unit may not be provided. That is, the muffling member may be formed in an annular shape from a polymer material such as a resin material or rubber that can expand and contract, and can be elastically deformed in the radial direction by expanding and contracting. Further, the muffling member may have a telescopic part which can be expanded and contracted in a part or a plurality of places in the circumferential direction instead of the dividing part, and this elastic part is made of a resin material or rubber having elasticity. Various materials and structures can be adopted, such as those made of a polymer material and those made of a stretchable spring material such as a bellows. Further, the sound deadening member is not limited to a ring-shaped member, and may be formed in a rectangular tube shape or a flat plate shape.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and a design change or the like may be made without departing from the scope of the present invention. The present invention is also included in the present invention.

10 Motorized valve (valve device)
1C Main valve chamber 14 Main valve port 2 Main valve (valve)
2A Valve main part 2D Silencer member 22 Cylindrical part 24 Sub-valve port 25 Communication hole 27 Main valve spring 28 Recess 29b Dividing part 3 Sub-valve 4 Drive unit 51 Coil spring 90 Refrigeration cycle system 91 First indoor heat exchanger 92 Second indoor heat exchanger 93 Compressor 95 Outdoor heat exchanger

Claims (9)

A valve device comprising a valve body that opens and closes a valve port,
The valve body is formed in a hollow shape and allows a fluid to flow therethrough, a communication hole communicating between the inside and the outside of the valve body main portion, and the valve body is provided to cover the communication hole and allows the fluid to pass therethrough. And a muffling member,
The muffling member is made of an elastic body, has a shape attachable to the valve body main part in a deformed state that is elastically deformed by receiving an external force, and the valve is in a restored state in which the external force is removed and goes to a natural state. A valve device which is held by a body part. The valve body main portion has a cylindrical portion, the communication hole is provided through the peripheral surface portion of the cylindrical portion,
2. The valve device according to claim 1, wherein the muffling member is formed in an annular shape, and is held on an outer circumferential side or an inner circumferential side of the main body of the valve body. 3.   The muffling member is formed to have a dividing part for dividing a part in a circumferential direction, and is configured to be elastically deformable in a radial direction by increasing or decreasing the width of the dividing part. Item 3. The valve device according to Item 2.   The valve device according to claim 2, wherein the muffling member is formed of a polymer material that can expand and contract, and is configured to be elastically deformable in a radial direction by expanding and contracting.   The valve device according to claim 2, wherein the muffling member is formed of a coil spring, and is configured to be elastically deformable in a radial direction by being twisted.   The valve device according to any one of claims 1 to 5, wherein the valve body main portion is provided with a concave portion that receives and locks the muffling member.   The valve device according to any one of claims 1 to 6, wherein the communication hole and the muffling member are provided through a gap. A main valve body that opens and closes a main valve port of a valve chamber, a main valve spring that biases the main valve body in a closing direction, and a sub-valve body that changes an opening of a sub-valve port provided in the main valve body And a drive unit for driving the sub-valve to advance and retreat in the axial direction,
The sub-valve has a two-stage flow control area of a small flow control area where the opening degree of the sub-valve port is changed, and a large flow control area where the main valve body opens and closes the main valve port,
The valve body according to any one of claims 1 to 7, wherein the valve body having the valve body main portion, the communication hole, and the muffling member constitutes the main valve body. Motorized valve characterized by the above-mentioned. A refrigeration cycle system including a compressor, a condenser, an expansion valve, and an evaporator,
A refrigeration cycle system, wherein the valve device according to any one of claims 1 to 7 is used as the expansion valve.

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