JP2021063529A - Motor valve and refrigeration cycle system - Google Patents

Abstract

To provide a motor valve capable of suppressing change in fluid passing sound in small flow rate control to reduce user's discomfort or the like, and a refrigeration cycle system.SOLUTION: A motor valve 10 comprises a valve body 1A, a main valve body 2, a sub valve body 3, a drive unit 4 that advances and retreats the sub valve body 3 and the main valve body 2, and a guide member 1B that advances and retreats the main valve body 2; and has a two-stage flow rate control range: a small flow rate control range for changing the opening degree of a sub valve port 24 and a large flow rate control range for opening and closing a main valve port 14. The motor valve comprises a first communication part 25A that connects a main valve chamber 1C and a sub valve chamber 23 and allows liquid refrigerant of gas-liquid two-phase refrigerant inside the main valve chamber 1C to pass therethrough, and a second communication part 25B that connects the main valve chamber 1C and the sub valve chamber 23 and allows gas refrigerant of the gas-liquid two-phase refrigerant to pass therethrough. With respect to the liquid level of the gas-liquid two-phase refrigerant, the first communication part 25A is provided below the liquid level, and the second communication part 25B is provided above the liquid level.SELECTED DRAWING: Figure 1

Description

The present invention relates to an electric valve and a refrigeration cycle system.

Conventionally, as an electric valve provided in a refrigeration cycle system of an air conditioner, a valve having a two-stage flow rate control range of a small flow rate control range and a large flow rate control range has been proposed (see, for example, Patent Document 1). .. In the small flow rate control region, the auxiliary valve body is driven forward and backward in the axial direction to control the flow rate at the auxiliary valve port of the main valve body. In the large flow rate control range, the main valve port of the main valve chamber is opened and closed by the main valve body to control the flow rate.

The electric valve described in Patent Document 1 includes a main valve body, a main valve spring, a sub valve body (pilot valve body), and a drive unit. The main valve body opens and closes the main valve port (large diameter port) of the main valve chamber. The sub-valve body opens and closes a sub-valve port (small diameter port) formed inside the main valve body. The drive unit has an electric motor (stepping motor) that drives the auxiliary valve body. In the above electric valve, the main valve body urged by the main valve spring sits on the main valve seat and closes the main valve port, and the sub-valve body driven forward and backward by the drive unit adjusts the opening of the sub-valve port. change. That is, the opening and retreating of the sub-valve body is driven by the drive unit to increase or decrease the opening degree of the sub-valve port, whereby small flow rate control is performed. Further, the main valve body is driven forward and backward via the auxiliary valve body engaged with the main valve body to open and close the main valve port, whereby a large flow rate control is performed.

Further, in the electric valve described in Patent Document 1, a plurality of lateral holes (conduction paths) are formed through the side surface portion of the main valve body, and these lateral holes form a main valve chamber and a sub valve inside the main valve body. It is connected to the room (pilot valve room). In the small flow control region where the main valve port is closed by the main valve body, the refrigerant passes between the main valve chamber and the sub valve chamber through the lateral hole, and further, the sub valve body and the sub valve port It will pass through the gap.

Japanese Unexamined Patent Publication No. 2012-117584

By the way, in the conventional electric valve described in Patent Document 1, the lateral hole communicating the main valve chamber and the sub-valve chamber extends right beside the sub-valve chamber and is formed through the side surface portion of the main valve body. , It is provided with an opening at a specific height position. Therefore, when the refrigerant is a gas-liquid two-phase refrigerant in the small flow rate control range and the liquid level fluctuates up and down with respect to the height position of the lateral hole, the space between the main valve chamber and the sub valve chamber is changed. One or both of the liquid refrigerant and the gas refrigerant may pass through, and the state change of the refrigerant may occur irregularly in the auxiliary valve chamber. When such a change in the state of the refrigerant occurs, the sound quality and sound pressure of the fluid passing sound of the refrigerant passing through the auxiliary valve port also change during small flow control, and the user who hears the fluid passing sound feels uncomfortable. There is a concern that it may cause discomfort.

Therefore, the present invention focuses on the above problems and provides an electric valve and a refrigeration cycle system capable of suppressing changes in fluid passing sound during small flow rate control and reducing user discomfort and the like. The purpose is.

In order to solve the above problems, the electric valve of the present invention opens and closes a valve body having a main valve chamber, a main valve seat, and a main valve port, and the main valve port, and internally opens and closes a sub valve chamber and a sub valve. A main valve body having a port, a sub-valve body that changes the opening degree of the sub-valve port, a drive unit that drives the sub-valve body and the main valve body to move forward and backward in the axial direction, and the main valve body are described. A small flow rate control area in which the sub-valve body changes the opening degree of the sub-valve port and a large flow rate control area in which the main valve body opens and closes the main valve port. An electric valve having a two-stage flow rate control range, the main valve chamber and the sub-valve chamber are communicated with each other, and the liquid refrigerant among the gas-liquid two-phase refrigerants in the main valve chamber is passed through. It is provided with one communication portion, and is provided with a second communication portion that communicates the main valve chamber and the sub-valve chamber and allows a gas refrigerant among the gas-liquid two-phase refrigerants in the main valve chamber to pass through. The first communication portion is provided below the liquid level, and the second communication portion is provided above the liquid level with respect to the liquid level of the liquid two-phase refrigerant. ..

According to the electric valve of the present invention, the first communication portion through which the liquid refrigerant is passed is provided below the liquid level of the gas-liquid two-phase refrigerant in the main valve chamber, and the second communication portion through which the gas refrigerant is passed is the main valve. It is provided above the liquid level of the gas-liquid two-phase refrigerant in the chamber. As a result, even if the liquid level of the gas-liquid two-phase refrigerant fluctuates up and down in the small flow rate control range where the main valve port is closed, the liquid refrigerant and the gas refrigerant always flow into the auxiliary valve chamber. , The state of the refrigerant in the auxiliary valve chamber is less likely to change. That is, by passing the liquid refrigerant through the first communication section and the gas refrigerant through the second communication section, the refrigerant becomes a gas-liquid two-phase state refrigerant in the auxiliary valve chamber, and the gas-liquid two-phase state refrigerant becomes a secondary It will pass through the valve port. By making it difficult for the state of the refrigerant to change in the auxiliary valve chamber in this way, it is possible to suppress changes in the sound quality and sound pressure of the fluid passing sound of the refrigerant passing through the auxiliary valve port during small flow control. It is possible to reduce the discomfort and the like.

Here, in the electric valve of the present invention, the main valve body includes a cylindrical portion including the sub-valve chamber, a seating portion provided below the cylindrical portion and seating on the main valve seat, and the seating portion. It has the sub-valve port provided on the inner side in the radial direction, and the outer peripheral surface of the cylindrical portion and the inner peripheral surface of the guide member are in sliding contact with each other to guide the advancement and retreat in the axial direction, and the first communication is performed. It is preferable that the portion is formed so as to penetrate the cylindrical portion in the lower region of the cylindrical portion including the position near the seating portion.

According to this configuration, the main valve body has a cylindrical portion, a seating portion, and a sub-valve port, and the first communication is performed through the cylindrical portion for the lower region of the cylindrical portion of the main valve body including the position near the seating portion. The part is formed. That is, the first communication portion is located near the lowermost portion of the main valve body seated on the main valve seat. As a result, even when the liquid level of the gas-liquid two-phase refrigerant drops in the main valve chamber, the liquid refrigerant can easily pass through the main valve chamber, and the influence of fluctuations in the liquid level can be reduced.

Further, in this configuration, the second communication portion includes the cylindrical portion in a region extending below the sliding contact portion including at least a part of the sliding contact portion in which the cylindrical portion is in sliding contact with the guide member. It is more preferable that it is formed through.

According to this configuration, a second communication portion is formed through the cylindrical portion in a region including at least a part of the sliding contact portion with the guide member and extending below the sliding contact portion. That is, the second communication portion is located until it reaches the uppermost portion of the cylindrical portion guided by the guide member that is exposed from the guide member. As a result, even when the liquid level of the gas-liquid two-phase refrigerant rises, the gas refrigerant can easily pass through, and the influence of fluctuations in the liquid level can be reduced.

Further, in this configuration, it is more preferable that the first communication portion and the second communication portion are each composed of one or a plurality of small holes penetrating the cylindrical portion, and are provided vertically separated from each other. Is.

Alternatively, the first communication portion and the second communication portion may be continuously formed as elongated holes or round holes in the axial direction penetrating the cylindrical portion.

According to these configurations, the first communication portion and the second communication portion are provided with small holes vertically separated from each other, or are formed continuously with each other. Thereby, an appropriate number, shape, and size of the first communication portion and the second communication portion can be selected and applied according to the performance required for the electric valve, the operating conditions, and the like.

Further, in the above configuration in which the first communication portion is formed in the region including the vicinity position of the seating portion, the second communication portion is the outer communication passage that penetrates the guide member and reaches above the main valve body. It is also more preferable that the main valve body and the sub-valve body are provided with an inner communication passage leading to the sub-valve chamber.

According to this configuration, since the second communication portion has the outer communication passage and the inner communication passage, the second communication passage can be formed at a higher position with respect to the main valve body. As a result, even when the liquid level of the gas-liquid two-phase refrigerant rises, the gas refrigerant can easily pass through the second communication portion, and the influence of fluctuations in the liquid level can be reduced.

Further, in the electric valve of the present invention, it is preferable that the first communication portion and the second communication portion are provided at a plurality of positions in the circumferential direction of the main valve body.

According to this configuration, since the first communication portion and the second communication portion are provided at a plurality of positions in the circumferential direction of the main valve body, the auxiliary valve is less susceptible to the influence of the circumferential bias of the refrigerant in the main valve chamber. The state of the refrigerant in the chamber can be stabilized.

In order to solve the above problems, the refrigeration cycle system of the present invention is a refrigeration cycle system including a compressor, a condenser, an expansion valve, and an evaporator, and the electric valve of the present invention described above is used. It is characterized in that it is used as the expansion valve.

According to the refrigeration cycle system of the present invention, the refrigerant in the sub-valve chamber is in a gas-liquid two-phase state, and the refrigerant in the gas-liquid two-phase state passes through the sub-valve port, similar to the effect of the electric valve described above. Therefore, the state change of the refrigerant is less likely to occur. As a result, in the refrigeration cycle system, changes in the fluid passing sound and sound quality of the refrigerant passing through the auxiliary valve port during small flow rate control (for example, dehumidification mode) are suppressed, and the user's discomfort and discomfort are reduced. Is possible.

According to the electric valve and the refrigeration cycle system of the present invention, it is possible to suppress the change in the fluid passing sound at the time of small flow rate control and reduce the discomfort and discomfort of the user.

It is a figure which shows the electric valve which concerns on one Embodiment of this invention. It is an enlarged view which shows the peripheral structure of the main valve body when the flow rate control state of the refrigerant in the electric valve shown in FIG. 1 is in a small flow rate control range. It is an enlarged view which shows the peripheral structure of the main valve body when the flow rate control state of the refrigerant in the electric valve shown in FIG. 1 is in a large flow rate control range. It is a figure which showed the side surface of the main valve body in the electric valve shown in FIG. It is a schematic diagram which shows the refrigeration cycle system which concerns on one Embodiment of this invention to which the electric valve shown in FIG. 1 is applied. It is a figure which shows the 1st modification with respect to the embodiment shown in FIGS. 1 to 5. It is a figure which shows the 2nd modification with respect to the embodiment shown in FIGS. 1 to 5. It is a figure which shows the 3rd modification with respect to the embodiment shown in FIGS. 1 to 5. It is a figure which shows the 4th modification with respect to the embodiment shown in FIGS. 1 to 5. It is a figure which shows the 5th modification with respect to the embodiment shown in FIGS. 1 to 5. It is a figure which shows the 6th modification with respect to the embodiment shown in FIGS. 1 to 5. It is a figure which shows the 7th modification with respect to the embodiment shown in FIGS. 1 to 5. It is a figure which shows the 8th modification with respect to the embodiment shown in FIGS. 1 to 5. It is a figure which shows the 9th modification with respect to the embodiment shown in FIGS. 1 to 5. It is a figure which shows the tenth modification with respect to the embodiment shown in FIGS. 1 to 5. It is a figure which showed the side surface of the main valve body shown in FIG. It is a figure which shows the eleventh modification with respect to the embodiment shown in FIGS. 1 to 5. It is a figure which shows the twelfth modification with respect to the embodiment shown in FIGS. 1 to 5.

An electric valve according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

FIG. 1 is a diagram showing an electric valve according to an embodiment of the present invention. FIG. 2 is an enlarged view showing the peripheral structure of the main valve body when the flow rate control state of the refrigerant in the electric valve shown in FIG. 1 is in the small flow rate control range. FIG. 3 is an enlarged view showing the peripheral structure of the main valve body when the flow rate control state of the refrigerant in the electric valve shown in FIG. 1 is in the large flow rate control range. Further, FIG. 4 is a view showing a side surface of a main valve body in the electric valve shown in FIG.

The electric 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. The concept of "upper and lower" in the following description corresponds to upper and lower in each drawing.

The valve housing 1 has a tubular valve body 1A and a guide member 1B fixed inside the valve body 1A. A cylindrical main valve chamber 1C is formed inside the valve body 1A. A first joint pipe 11 that communicates with the main valve chamber 1C from the side surface side to allow the refrigerant to flow in and out is attached to the valve body 1A. Further, a second joint pipe 12 is attached, which communicates with the main valve chamber 1C from the bottom surface side and allows the refrigerant to flow in and out. Further, in the valve body 1A, the main valve seat 13 is formed at a position where the main valve chamber 1C and the second joint pipe 12 communicate with each other, and the cross-sectional shape is formed from the main valve seat 13 to the second joint pipe 12 side. A circular main valve port 14 is formed. The guide member 1B is welded and fixed to the valve body 1A by a metal fixing portion 15. The guide member 1B is a resin molded product, and has a cylindrical main valve guide portion 16 provided on the main valve seat 13 side and a female screw portion provided on the drive portion 4 side and having female threads formed on the inner peripheral surface. 17 and is formed. A case 18 is airtightly fixed to the valve body 1A by welding or the like at the upper end of the valve body 1A.

The main valve body 2 has a valve body main portion 2A that advances and retreats in the axial direction with respect to the main valve seat 13, a spring receiving portion 2B, and a sub valve seat 2C. The valve body main portion 2A includes a cylindrical cylindrical portion 22 whose axial direction is the axis L, a sub valve chamber 23 contained in the cylindrical portion 22 through which a fluid flows, and a sub valve seat 2C along the axis L. It has an auxiliary valve port 24 that penetrates. An integrated communication hole 25 is formed on the side of the first joint pipe 11 on the peripheral surface of the cylindrical portion 22, and the auxiliary valve chamber 23 is communicated with the main valve chamber 1C by the integrated communication hole 25. The integrated communication hole 25 is formed by continuously forming a first communication portion 25A corresponding to the lower end side portion and a second communication portion 25B corresponding to the upper end side portion as long holes in the axial direction penetrating the cylindrical portion 22. The integrated communication hole 25, the first communication portion 25A, and the second communication portion 25B will be described again later.

An insertion hole 26 along the axis L is formed on the inner peripheral surface of the cylindrical portion 22 of the valve body main portion 2A, and the auxiliary valve base portion 3A of the auxiliary valve body 3 is inserted into the insertion hole 26. The spring receiving portion 2B is formed in an annular shape and is fixed to the upper end portion of the valve body main portion 2A, and the rotor shaft 46 is inserted therein. A main valve spring 27 is arranged between the upper surface of the spring receiving portion 2B and the ceiling surface of the guide member 1B, and the main valve body 2 is moved in the main valve seat 13 direction (closing direction) by the main valve spring 27. Is being urged to.

The sub-valve body 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. It is composed of an auxiliary valve spring (not shown) provided inside. The sub-valve base 3A is inserted into the insertion hole 26 of the main valve body 2 and is supported so as to be vertically reciprocating along the axis L and rotatably around the axis L. The thrust washer 3C can come into contact with the upper surface of the auxiliary valve base portion 3A and the lower surface of the spring receiving portion 2B, and the frictional force between the contact surfaces is extremely small. An insertion hole is provided in the upper part of the sub-valve base 3A, the rotor shaft 46 is inserted, and a flange (not shown) formed at the lower end of the rotor shaft 46 and a sub-valve joined to the bottom of the sub-valve base 3A. A sub-valve spring is arranged between the portion 3B and the upper end portion. The sub-valve body 3 is urged by the sub-valve spring in the sub-valve seat 2C direction (closed direction) with respect to the rotor shaft 46 (magnet rotor 44). The sub-valve base 3A may be integrally formed with the rotor shaft 46 and the sub-valve 3B. In that case, the sub-valve base 3A may be formed in a solid state 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 advancing and retreating the auxiliary valve body 3 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 in multiple poles, a stator coil 45 arranged on the outer peripheral portion of the case 18, and a rotor shaft 46 fixed to the magnet rotor 44. .. The rotor shaft 46 is fixed to the magnet rotor 44 via the fixing member 46a and extends along the axis L, and the upper end portion thereof is inserted into the guide 47 of the stopper mechanism 43. A male screw portion 46b is integrally formed in the intermediate portion of the rotor shaft 46, and the male screw portion 46b is screwed into the female screw portion 17 of the guide member 1B, whereby the screw feed mechanism 42 is formed. When the magnet rotor 44 rotates, the male threaded portion 46b of the rotor shaft 46 is guided to the female threaded portion 17. As a result, the magnet rotor 44 and the rotor shaft 46 move forward and backward in the axis L direction, and accordingly, the auxiliary valve body 3 and the main valve body 2 are driven forward and backward (up or down) in the axial direction along the axis L. ..

The stopper mechanism 43 has a cylindrical guide 47 hanging from the ceiling of the case 18, a guide wire 48 fixed to the outer circumference of the guide 47, and a movable guide wire 48 that can rotate and move up and down. It includes a slider 49 and. The movable slider 49 is provided with a claw portion 49a protruding outward in the radial direction, and the magnet rotor 44 is provided with an extension portion 44a extending upward and in contact with the claw portion 49a. When the magnet rotor 44 rotates, the extension portion 44a pushes the claw portion 49a, so that the movable slider 49 rotates and moves up and down in accordance with the guide wire body 48. The guide wire body 48 is formed with an upper end stopper 48a that defines the uppermost end position of the magnet rotor 44 and a lower end stopper 48b that defines the lowermost end position of the magnet rotor 44. When the movable slider 49 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 auxiliary valve body 3 and the main valve body 2 advance and retreat. The drive is also stopped.

Next, the integrated communication hole 25, the first communication portion 25A, and the second communication portion 25B in the main valve body 2 will be described.

In the state of being in the small flow rate control range shown in FIGS. 1 and 2, first, the first communication portion 25A, which corresponds to the lower end side portion of the integrated communication hole 25, communicates the main valve chamber 1C and the sub-valve chamber 23. Of the gas-liquid two-phase refrigerant inside the main valve chamber 1C, the liquid refrigerant that is the lower layer is passed through. Further, the second communication portion 25B, which corresponds to the upper end side portion of the integrated communication hole 25, communicates the main valve chamber 1C and the sub-valve chamber 23, and is a gas that becomes the upper layer of the gas-liquid two-phase refrigerant inside the main valve chamber 1C. Allow the refrigerant to pass through. Then, as shown in FIG. 4, the first communication portion 25A is provided below the liquid level LV11 with respect to the liquid level LV11 of the gas-liquid two-phase refrigerant, and the second communication portion 25B is the liquid level. It is provided above the LV11.

The first communication portion 25A is formed so as to penetrate the cylindrical portion 22 in a region including a position near the seating portion 21 provided under the cylindrical portion 22 of the main valve body 2. The auxiliary valve port 24 described above is provided on the inner side in the radial direction of the seating portion 21. On the other hand, the second communication portion 25B includes at least a part of the sliding contact portion 22A in which the cylindrical portion 22 is in sliding contact with the guide member 1B when the main valve body 2 is seated on the main valve seat 13 and the small flow rate is controlled. It is formed so as to penetrate the cylindrical portion 22 in a region extending below the sliding contact portion 22A. The first communication portion 25A and the second communication portion 25B are formed so as to form an integral communication hole 25 continuously with each other as an axially elongated hole penetrating the cylindrical portion 22.

The above electric valve 10 operates as follows. First, in the state of FIG. 2, the seating 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 body 3 located 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 body 3 and the inner peripheral surface of the sub-valve port 24. A flow path is formed by the gap between the two. Therefore, when the refrigerant in the gas-liquid two-phase state flows from the first joint pipe 11 into the main valve chamber 1C, the liquid refrigerant in the lower layer passes through the first communication portion 25A, and the gas refrigerant in the upper layer passes through the second communication portion 25A. It passes through the communication portion 25B and flows into the auxiliary valve chambers 23, respectively. As a result, the refrigerant is in a gas-liquid two-phase state also in the auxiliary valve chamber 23. The refrigerant in the sub-valve chamber 23 flows downward through the gap between the sub-valve portion 3B and the sub-valve port 24, and flows out from the main valve port 14 toward the second joint pipe 12. That is, in the electric valve 10, even if the valve opening degree of the main valve port 14 by the main valve body 2 is zero, a minute flow rate of the refrigerant is generated through the sub valve port 24.

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

According to the electric valve 10 of the embodiment described above, the first communication portion 25A through which the liquid refrigerant passes is provided below the liquid level LV11 of the gas-liquid two-phase refrigerant inside the main valve chamber 1C, and the gas refrigerant is provided. The second communication portion 25B is provided above the liquid level LV11 of the gas-liquid two-phase refrigerant inside the main valve chamber 1C. In the small flow rate control range, the flow rate is small even when the auxiliary valve is fully opened, and there is no significant change in the position of the liquid level LV11, which causes the liquid level of the gas-liquid two-phase refrigerant to fluctuate slightly up and down. Even if there is, it becomes difficult for the state of the refrigerant in the auxiliary valve chamber 23 to change. That is, by passing the liquid refrigerant through the first communication section 25A and the gas refrigerant through the second communication section 25B in the small flow control range, the auxiliary valve chamber 23 becomes a liquid-only state or a gas-only state. The refrigerant is always in the gas-liquid two-phase state without changing, and the gas-liquid two-phase state refrigerant passes through the auxiliary valve port 24. By making it difficult for the state of the refrigerant to change in this way, it is possible to suppress changes in the sound quality and sound pressure of the fluid passing sound of the refrigerant passing through the auxiliary valve port 24 during small flow rate control, resulting in user discomfort and the like. Can be reduced.

Here, in the present embodiment, the main valve body 2 has a cylindrical portion 22, a seating portion 21, and a sub-valve port 24, and the first communication penetrates the cylindrical portion 22 for a region including a position near the seating portion 21. Part 25A is formed. That is, the first communication portion 25A is located near the lowermost portion of the main valve body 2 seated on the main valve seat 13. As a result, even when the liquid level of the gas-liquid two-phase refrigerant drops in the main valve chamber 1C, the liquid refrigerant can easily pass through the main valve chamber 1C, and the influence of fluctuations in the liquid level can be reduced.

Further, in the present embodiment, the second communication portion 25B is formed through the cylindrical portion 22 in a region including at least a part of the sliding contact portion 22A with the guide member 1B and extending below the sliding contact portion 22A. Has been done. That is, the second communication portion 25B is located until it reaches the uppermost portion of the cylindrical portion 22 guided by the guide member 1B, which is exposed from the guide member 1B. As a result, even when the liquid level of the gas-liquid two-phase refrigerant rises, the gas refrigerant can easily pass through, and the influence of fluctuations in the liquid level can be reduced.

Then, in the present embodiment, the first communication portion 25A and the second communication portion 25B are formed so as to form a long-hole-shaped integral communication hole 25 that is continuous with each other. The integrated communication hole 25 including the first communication portion 25A and the second communication portion 25B is set to an appropriate shape and size according to the performance and operating conditions required for the electric valve 10.

Next, an embodiment of the refrigeration cycle system of the present invention will be described.

FIG. 5 is a schematic view showing a refrigeration cycle system according to an embodiment of the present invention to which the electric valve shown in FIG. 1 is applied.

This refrigeration cycle system 90 is used, for example, in an air conditioner such as a home air conditioner. The electric valve 10 of the above embodiment is provided between the first chamber side heat exchanger 91 (operating as an evaporator) and the second chamber side heat exchanger 92 (operating as a condenser) of the air conditioner. .. The electric valve 10 constitutes a heat pump type refrigeration cycle together with a compressor 93, a four-way valve 94, an outdoor heat exchanger 95 (acting as a condenser or an evaporator) and an electronic expansion valve 96. The first indoor side heat exchanger 91, the second indoor side 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 outdoors. It constitutes a heating and cooling system.

According to the refrigeration cycle system 90 of the present embodiment, the refrigerant in the sub-valve chamber 23 is in a gas-liquid two-phase state, and the refrigerant in the gas-liquid two-phase state is in the gas-liquid two-phase state, similar to the effect of the electric valve 10 described above. Since it passes through the refrigerant, it is difficult for the state of the refrigerant to change. As a result, in the refrigeration cycle system 90, changes in the fluid passing sound and sound quality of the refrigerant passing through the auxiliary valve port 24 during small flow rate control (for example, dehumidification mode) are suppressed, and the user's discomfort and discomfort are reduced. It becomes possible to do.

Next, various modifications to the above-described embodiment will be described below. In each of the following modifications, the first communication portion through which the liquid refrigerant passes and the second communication portion through which the gas refrigerant passes are different from the above-described embodiment. In the following, the modified examples will be described by paying attention to the differences from the embodiments, and the same points will be indicated by the same reference numerals as those of the embodiments in each figure, and duplicate description will be omitted.

FIG. 6 is a diagram showing a first modification with respect to the embodiment shown in FIGS. 1 to 5.

In this first modification, the first communication portion 251A and the second communication portion 251B form an integral communication hole 251 which is an elliptical elongated hole that is continuous with each other and penetrates the cylindrical portion 22 of the main valve body 2. There is. Here, the second communication portion 251B in the first modification does not reach the sliding contact portion 22A with the guide member 1B in the cylindrical portion 22, but is above the liquid level LV11 of the gas-liquid two-phase refrigerant. It is provided. Further, the first communication portion 251A is provided below the liquid level LV11 and penetrates the cylindrical portion 22 for a region including a position near the seating portion 21.

FIG. 7 is a diagram showing a second modification with respect to the embodiment shown in FIGS. 1 to 5.

In this second modification, the first communication portion 252A and the second communication portion 252B form an integral communication hole 252 which is a long hole narrower than the above-described embodiment and is a cylinder of the main valve body 2. It penetrates the portion 22. The second communication portion 252B also does not reach the sliding contact portion 22A with the guide member 1B in the cylindrical portion 22. However, the second communication portion 252B is provided above the liquid level LV11 of the gas-liquid two-phase refrigerant, and the first communication portion 252A is below the liquid level LV11 and includes a position near the seating portion 21. It is provided so as to penetrate the cylindrical portion 22.

FIG. 8 is a diagram showing a third modification with respect to the embodiment shown in FIGS. 1 to 5.

In this third modification, the first communication portion 253A and the second communication portion 253B continuously form a round hole-shaped integral communication hole 253 and penetrate the cylindrical portion 22 of the main valve body 2. The second communication portion 253B also does not reach the sliding contact portion 22A with the guide member 1B in the cylindrical portion 22. However, the second communication portion 253B is provided above the liquid level LV11 of the gas-liquid two-phase refrigerant, and the first communication portion 253A is below the liquid level LV11 and includes a position near the seating portion 21. It is provided so as to penetrate the cylindrical portion 22.

FIG. 9 is a diagram showing a fourth modification with respect to the embodiment shown in FIGS. 1 to 5.

In this fourth modification, the integrated communication hole 254 including the first communication portion 254A and the second communication portion 254B has the same plan-view shape as the above-described embodiment when the side surface of the cylindrical portion 22 of the main valve body 2 is viewed. It has a similar elongated hole shape. Further, the second communication portion 254B also reaches the sliding contact portion 22A with the guide member 1B in the cylindrical portion 22, and is provided above the liquid level LV11 of the gas-liquid two-phase refrigerant, as in the embodiment. is there. Further, it is the same as the embodiment in that the first communication portion 254A is provided below the liquid level LV11 and penetrates the cylindrical portion 22 in the region including the vicinity position of the seating portion 21. However, in this fourth modification, the shape of the vertical cross section of the integrated communication hole 254 along the axis L is different from that of the embodiment shown in FIG. The integrated communication hole 254 in the fourth modification has a shape in which the vertical cross-sectional shape at the lower end of the first communication portion 254A is inclined and widens toward the seating portion 21 as the distance from the auxiliary valve chamber 23 increases.

Also in the first to fourth modifications described above, the first communication portions 251A, ..., 254A are provided below the liquid level LV11 of the gas-liquid two-phase refrigerant, and the second communication portions 251B, ..., Since the 254B is provided above, it is possible to make it difficult for the state change of the refrigerant to occur. That is, even with these modified examples, it is possible to suppress changes in the sound quality and sound pressure of the fluid passing sound of the refrigerant passing through the auxiliary valve port 24 during small flow rate control, as in the above-described embodiment. It is possible to reduce discomfort and the like.

As in the first to third modifications, the second communication portions 251B, 252B, and 253B may be provided so as not to reach the sliding contact portion 22A of the cylindrical portion 22. However, as in the above-described embodiment and the fifth modification, the second communication portions 25B and 254B are provided so as to reach the sliding contact portion 22A of the cylindrical portion 22, so that the influence of the fluctuation of the liquid level is further reduced. The points that can be done are as described above.

FIG. 10 is a diagram showing a fifth modification with respect to the embodiment shown in FIGS. 1 to 5.

In this fifth modification, the first communication portion 255A and the second communication portion 255B are each composed of one small hole penetrating the cylindrical portion 22, and are provided vertically separated from each other. At this time, the upper second communication portion 255B is formed so as to penetrate the cylindrical portion 22 in a region extending below the sliding contact portion 22A including a part of the sliding contact portion 22A of the cylindrical portion 22. .. The lower first communication portion 255A is formed so as to penetrate the cylindrical portion 22 for a region including a position near the seating portion 21. The first communication portion 255A is provided below the liquid level LV11 of the gas-liquid two-phase refrigerant, and the second communication portion 255B is provided above. Further, in the fifth modification, the first communication portion 255A and the second communication portion 255B are straight holes extending in the direction orthogonal to the axis L, respectively.

FIG. 11 is a diagram showing a sixth modification with respect to the embodiment shown in FIGS. 1 to 5.

This sixth modification is also a modification with respect to the fifth modification described above. First, similarly to the fifth modification, the first communication portion 256A and the second communication portion 256B each penetrate the cylindrical portion 22. It is composed of small holes of the above, and is provided vertically separated from each other. Then, the second communication portion 256B is formed so as to penetrate the cylindrical portion 22 in a region including a part of the sliding contact portion 22A of the cylindrical portion 22 and extending below the sliding contact portion 22A, and the first communication portion is formed. 256A is formed in a region including a position near the seating portion 21. The first communication portion 256A is provided below the liquid level LV11 of the gas-liquid two-phase refrigerant, and the second communication portion 256B is provided above. At this time, the upper second communication portion 256B has a straight hole similar to that of the fifth modification. On the other hand, the lower first communication portion 256A is formed in a tapered shape whose cross-sectional shape is tapered as the distance from the auxiliary valve chamber 23 increases.

FIG. 12 is a diagram showing a seventh modification with respect to the embodiment shown in FIGS. 1 to 5.

This seventh modification is also a modification with respect to the sixth modification described above. First, similarly to the sixth modification, the first communication portion 257A and the second communication portion 257B each penetrate the cylindrical portion 22. It is composed of small holes of the above, and is provided so as to be separated from each other at the top and bottom. Then, the second communication portion 257B is formed so as to penetrate the cylindrical portion 22 in a region including a part of the sliding contact portion 22A of the cylindrical portion 22 and extending below the sliding contact portion 22A, and the first communication portion is formed. 257A is formed in a region including a position near the seating portion 21. The first communication portion 257A is provided below the liquid level LV11 of the gas-liquid two-phase refrigerant, and the second communication portion 257B is provided above. At this time, the upper second communication portion 257B has a straight hole similar to that of the sixth modification. On the other hand, the lower first communication portion 257A is formed in a reverse taper shape whose cross-sectional shape increases in diameter as the distance from the auxiliary valve chamber 23 increases.

Also in the fifth to seventh modifications described above, the first communication portions 255A, 256A, and 257A are provided below the liquid level LV11 of the gas-liquid two-phase refrigerant, and the second communication portions 255B, 256B, and 257B are above. By providing it, it is possible to make it difficult for the state change of the refrigerant to occur. That is, even with these modified examples, it is possible to suppress changes in the sound quality and sound pressure of the fluid passing sound of the refrigerant passing through the auxiliary valve port 24 during small flow rate control, as in the above-described embodiment. It is possible to reduce discomfort and the like.

Further, in the fifth to seventh modifications, the first communication portions 255A, 256A, 257A and the second communication portions 255B, 256B, 257B, which are separated vertically, have the performance, operating conditions, etc. required for the electric valve 10. It is set to an appropriate shape and size according to the above.

FIG. 13 is a diagram showing an eighth modification with respect to the embodiment shown in FIGS. 1 to 5.

Also in this eighth modification, first, as in the sixth modification, the first communication portion 258A and the second communication portion 258B are each composed of one small hole penetrating the cylindrical portion 22, and are separated from each other vertically. It is provided. The second communication portion 258B is formed so as to penetrate the cylindrical portion 22 in a region including a part of the sliding contact portion 22A of the cylindrical portion 22 and extending below the sliding contact portion 22A, and the first communication portion 258A is formed. , Is formed in a region including a position near the seating portion 21. The first communication portion 258A is provided below the liquid level LV11 of the gas-liquid two-phase refrigerant, and the second communication portion 258B is provided above. At this time, in the eighth modification, the first communication portion 258A and the second communication portion 258B are provided at a plurality of positions of the cylindrical portion 22 in the main valve body 2 in the circumferential direction D11, respectively.

Even in the eighth modification described above, the state of the refrigerant changes because the first communication portion 258A is provided below the liquid level LV11 of the gas-liquid two-phase refrigerant and the second communication portion 258B is provided above. Can be made less likely to occur. That is, also in this eighth modification, as in the above-described embodiment, it is possible to suppress changes in the sound quality and sound pressure of the fluid passing sound of the refrigerant passing through the auxiliary valve port 24 during small flow rate control, and the user. It is possible to reduce the discomfort and the like.

Further, in the eighth modification, since the first communication portion 258A and the second communication portion 258B are provided at a plurality of positions in the circumferential direction D11 of the main valve body 2, the refrigerant in the main valve chamber 1C is biased in the circumferential direction D11. It is not easily affected by the above, and the state of the refrigerant in the auxiliary valve chamber 23 can be stabilized.

FIG. 14 is a diagram showing a ninth modification with respect to the embodiment shown in FIGS. 1 to 5.

Also in this ninth modification, first, as in the sixth modification, the first communication portion 259A and the second communication portion 259B are each composed of one small hole penetrating the cylindrical portion 22, and are separated from each other vertically. It is provided. The second communication portion 259B is formed so as to penetrate the cylindrical portion 22 in a region extending below the sliding contact portion 22A including a part of the sliding contact portion 22A of the cylindrical portion 22 in the main valve body 2. .. The other first communication portion 259A is formed in a region including a position near the seating portion 21. The first communication portion 259A is provided below the liquid level LV11 of the gas-liquid two-phase refrigerant, and the second communication portion 259B is provided above. At this time, in the ninth modification, the third communication portion 259C is provided at an intermediate position between the first communication portion 259A and the second communication portion 259B in the axial direction. The third communication portion 259C is located on the opposite side of the first communication portion 259A and the second communication portion 259B in the circumferential direction D11. The third communication portion 259C is close to the liquid level LV11 and is another communication portion that rises or falls below the liquid level when the liquid level of the gas-liquid two-phase refrigerant rises or falls.

In the ninth modification described above, the state of the refrigerant changes because the first communication portion 258A is provided below the liquid level LV11 of the gas-liquid two-phase refrigerant and the second communication portion 258B is provided above. Can be made less likely to occur. That is, also in this ninth modification, as in the above-described embodiment, it is possible to suppress changes in the sound quality and sound pressure of the fluid passing sound of the refrigerant passing through the auxiliary valve port 24 during small flow rate control, and the user. It is possible to reduce the discomfort and the like.

FIG. 15 is a diagram showing a tenth modification with respect to the embodiment shown in FIGS. 1 to 5. Further, FIG. 16 is a view showing a side surface of the main valve body shown in FIG.

In this tenth modification, the first communication portion 261A and the second communication portion 261B are each formed of small holes penetrating the cylindrical portion 22 of the main valve body 2, and are provided vertically separated from each other. Specifically, on the side surface of the cylindrical portion 22, four small holes are arranged at equal intervals in the vertical direction along the axis L, and one small hole at the bottom is from the liquid level LV11 of the gas-liquid two-phase refrigerant. Is also the first communication section 261A provided below. Further, one of the four small holes at the uppermost stage is a second communication portion 261B provided above the liquid level LV11 of the gas-liquid two-phase refrigerant. The two small holes at the intermediate position are close to the liquid level LV11 and serve as another third communication portion 261C that moves above or below the liquid level when the liquid level of the gas-liquid two-phase refrigerant rises and falls. There is.

Even in the tenth modification described above, the state of the refrigerant changes because the first communication portion 261A is provided below the liquid level LV11 of the gas-liquid two-phase refrigerant and the second communication portion 261B is provided above. Can be made less likely to occur. That is, also in this tenth modification, as in the above-described embodiment, it is possible to suppress changes in the sound quality and sound pressure of the fluid passing sound of the refrigerant passing through the auxiliary valve port 24 during small flow rate control, and the user. It is possible to reduce the discomfort and the like.

In this tenth modification, one of the lowermost stages of the plurality of small holes is the first communication portion 261A below the liquid level LV11, and one of the uppermost stages is the second communication portion above the liquid level LV11. It is part 261B. However, unlike the tenth modification, two or more of the plurality of small holes on the upper side form the first communication portion below the liquid level, and two or more on the lower side form the second communication portion below the liquid level. It may be configured to form a communication portion. The first communication section and the second communication section are set to an appropriate number, shape, and size according to the performance and operating conditions required for the electric valve.

FIG. 17 is a diagram showing an eleventh modification with respect to the embodiment shown in FIGS. 1 to 5.

In this eleventh modification, the first communication portion 262A below the liquid level LV11 of the gas-liquid two-phase refrigerant is composed of small holes penetrating the cylindrical portion 22 of the main valve body 2. On the other hand, the second communication portion 262B above the liquid level LV11 has an outer communication passage 262B-1 that penetrates the guide member 1B and reaches above the main valve body 2, and the main valve body 2 and the sub valve body 3. It is configured to have an inner communication passage 262B-2 that leads to the auxiliary valve chamber 23 through the space.

The outer passage 262B-1 includes a first penetrating portion 262B-1a that vertically penetrates a flange portion joined to the upper edge of the valve body 1A in the guide member 1B, and a side wall above the flange portion in the guide member 1B. It has a second penetrating portion 262B-1b that penetrates left and right. When the gas refrigerant reaches from the main valve chamber 1C to the sub-valve chamber 23, it passes from the main valve chamber 1C through the first penetrating portion 262B-1a and reaches the inside of the upper case 18 (FIG. 1). After that, it passes through the second penetrating portion 262B-1b to reach above the sub-valve body 3, passes through the inner communication passage 262B-2, and reaches the sub-valve chamber 23. On the other hand, the liquid refrigerant passes between the main valve chamber 1C and the sub-valve chamber 23 through the first communication portion 262A below the liquid level LV11.

Even in the eleventh modification described above, the state of the refrigerant changes because the first communication portion 262A is provided below the liquid level LV11 of the gas-liquid two-phase refrigerant and the second communication portion 262B is provided above. Can be made less likely to occur. That is, also in this eleventh modification, as in the above-described embodiment, it is possible to suppress changes in the sound quality and sound pressure of the fluid passing sound of the refrigerant passing through the auxiliary valve port 24 during small flow rate control, and the user. It is possible to reduce the discomfort and the like.

Further, according to the eleventh modification, the second communication portion 262B has the outer communication passage 262B-1 and the inner communication passage 262B-2, so that the second communication passage 262B is higher than the main valve body 2. Can be formed in position. As a result, even when the liquid level of the gas-liquid two-phase refrigerant rises, the gas refrigerant can easily pass through the second communication portion 262B, and the influence of fluctuations in the liquid level can be reduced.

FIG. 18 is a diagram showing a twelfth modification with respect to the embodiment shown in FIGS. 1 to 5.

This 12th modification is also a modification with respect to the 11th modification described above. First, as in the 11th modification, the first communication portion 263A below the liquid level LV11 of the gas-liquid two-phase refrigerant is mainly used. It is composed of small holes penetrating the cylindrical portion 22 of the valve body 2. On the other hand, the second communication portion 263B above the liquid level LV11 has an outer communication passage 263B-1 that penetrates the guide member 1B and reaches above the main valve body 2, and the main valve body 2 and the sub valve body 3. It is configured to have an inner communication passage 263B-2 that leads to the auxiliary valve chamber 23 through the space.

Here, the outer communication passage 263B-1 in the twelfth modification has a first penetrating portion 263B-1a that penetrates the side wall below the flange portion of the guide member 1B to the left and right, and a cylindrical portion 22 of the main valve body 2. It has a groove-shaped second penetrating portion 263B-1b provided on the outer peripheral surface of the above. The second penetrating portion 263B-1b is a groove provided so as to extend in the vertical direction on the outer peripheral surface of the cylindrical portion 22 along the axis L. When the gas refrigerant reaches from the main valve chamber 1C to the sub-valve chamber 23, it passes from the main valve chamber 1C through the first penetrating portion 263B-1a to the inside of the guide member 1B. After that, it passes through the second penetrating portion 263B-1b and reaches above the auxiliary valve body 3.

The inner communication passage 263B-2 is a groove formed on the outer peripheral surface of the sub-valve base 3A of the sub-valve body 3 so as to extend in the vertical direction along the axis L. The gas refrigerant that has passed through the second penetrating portion 263B-1b and reached above the auxiliary valve body 3 passes through the inner communication passage 263B-2 and reaches the auxiliary valve chamber 23. On the other hand, the liquid refrigerant passes between the main valve chamber 1C and the sub-valve chamber 23 through the first communication portion 263A below the liquid level LV11.

Even in the twelfth modification described above, the state of the refrigerant changes because the first communication portion 263A is provided below the liquid level LV11 of the gas-liquid two-phase refrigerant and the second communication portion 263B is provided above. Can be made less likely to occur. That is, also in this twelfth modification, as in the above-described embodiment, it is possible to suppress changes in the sound quality and sound pressure of the fluid passing sound of the refrigerant passing through the auxiliary valve port 24 during small flow rate control, and the user. It is possible to reduce the discomfort and the like.

Further, also in the twelfth modification, similarly to the eleventh modification described above, the second communication portion 263B has the outer communication passage 263B-1 and the inner communication passage 263B-2, so that the main valve body 2 is provided with the second communication portion 263B. The second passage 263B can be formed at a higher position. As a result, even when the liquid level of the gas-liquid two-phase refrigerant rises, the gas refrigerant can easily pass through the second communication portion 263B, and the influence of fluctuations in the liquid level can be reduced.

It should be noted that the embodiments and modifications described above merely show typical embodiments of the present invention, and the present invention is not limited thereto. That is, it can be modified in various ways without departing from the gist of the present invention. As long as the electric valve and the refrigeration cycle system of the present invention are still provided by such deformation, they are, of course, included in the category of the present invention.

For example, in the above-described embodiment, the electric valve 10 used in an air conditioner such as a home air conditioner has been exemplified, but the electric valve of the present invention is not limited to the home air conditioner and may be a commercial air conditioner. , Not limited to air conditioners, it can also be applied to various refrigerators and the like. Further, in the present embodiment, it is described that the refrigerant flows in from the first joint pipe 11 and flows out from the second joint pipe 12. However, the flow is not limited to this one direction, and can be applied to the case where the refrigerant flows in from the second joint pipe 12 and flows out from the first joint pipe 11 as a backflow, especially in the fully open state. May be backflowed.

Further, in the above-described embodiment and the first to twelfth modifications, the first communication portion below the liquid level of the gas-liquid two-phase refrigerant and the second communication portion above the liquid level of the gas-liquid two-phase refrigerant. , Specific numbers, shapes, and sizes are illustrated for each. However, these communication parts are not limited to the specific examples illustrated, and the first communication parts and the first communication parts having an appropriate number, shape, and size according to the performance and operating conditions required for the electric valve are not limited. Two communication parts can be selected and applied.

1 Valve housing 1A Valve body 1C Main valve chamber 2 Main valve body 2A Valve body Main part 2C Sub valve seat 3 Sub valve body 4 Drive part 10 Electric valve 13 Main valve seat 14 Main valve port 21 Seating part 22 Cylindrical part 22A Sliding connection Part 23 Sub-valve chamber 24 Sub-valve port 25,251,252,253,254 Integrated communication holes 25A, 251A, 252A, 253A, 254A, 255A, 256A, 257A, 258A, 259A, 261A, 262A, 263A 1st communication part 25B, 251B, 252B, 253B, 254B, 255B, 256B, 257B, 258B, 259B, 261B, 262B, 263B 2nd communication part 90 Refrigeration cycle system 91 1st indoor heat exchanger (evaporator)
92 Second chamber side heat exchanger (condenser)
93 Compressor 95 Outdoor heat exchanger (evaporator or condenser)
259C, 261C 3rd communication part 262B-1,263B-1 Outer passage 262B-1a, 263B-1a 1st penetration 262B-1b, 263B-1b 2nd penetration 262B-2, 263B-2 Inner passage LV11 Liquid surface

Claims (8)

The valve body having the main valve chamber, the main valve seat, and the main valve port, the main valve body having the sub valve chamber and the sub valve port inside while opening and closing the main valve port, and the opening of the sub valve port. The sub valve body includes a sub valve body for changing the degree, a drive unit for driving the sub valve body and the main valve body forward and backward in the axial direction, and a guide member for guiding the main valve body forward and backward in the axial direction. An electric valve having a two-stage flow rate control range, that is, a small flow rate control range in which the valve body changes the opening degree of the sub valve port and a large flow rate control range in which the main valve body opens and closes the main valve port. There,
The main valve chamber and the sub-valve chamber are communicated with each other, and the first communication portion through which the liquid refrigerant of the gas-liquid two-phase refrigerant in the main valve chamber is passed is provided, and the main valve chamber and the sub-valve chamber are provided. A second communicating portion for communicating and passing a gas refrigerant among the gas-liquid two-phase refrigerants in the main valve chamber is provided.
The first communication portion is provided below the liquid level, and the second communication portion is provided above the liquid level with respect to the liquid level of the gas-liquid two-phase refrigerant. Electric valve. The main valve body includes a cylindrical portion including the auxiliary valve chamber, a seating portion provided below the cylindrical portion and seated on the main valve seat, and the sub portion provided radially inside the seating portion. It has a valve port, and is guided in the axial direction by sliding contact between the outer peripheral surface of the cylindrical portion and the inner peripheral surface of the guide member.
The electric valve according to claim 1, wherein the first communication portion is formed so as to penetrate the cylindrical portion in a lower region of the cylindrical portion including a position near the seating portion. The second communication portion is formed so as to penetrate the cylindrical portion in a region extending below the sliding contact portion including at least a part of the sliding contact portion in which the cylindrical portion slides into contact with the guide member. The electric valve according to claim 2, wherein the electric valve is provided. The third aspect of claim 3, wherein the first communication portion and the second communication portion are each composed of one or a plurality of small holes penetrating the cylindrical portion, and are provided vertically separated from each other. Electric valve. The electric valve according to claim 3, wherein the first communication portion and the second communication portion are continuously formed as elongated holes or round holes in the axial direction penetrating the cylindrical portion. .. The second communication portion is an outer communication passage that penetrates the guide member and extends above the main valve body, and an inner communication portion that passes between the main valve body and the sub valve body and reaches the sub valve chamber. The electric valve according to claim 2, wherein the electric valve is configured to have a passage. The electric valve according to any one of claims 1 to 6, wherein the first communication portion and the second communication portion are provided at a plurality of positions in the circumferential direction of the main valve body. A refrigeration cycle system including a compressor, a condenser, an expansion valve, and an evaporator, wherein the electric valve according to any one of claims 1 to 7 is used as the expansion valve. A refrigeration cycle system characterized by that.

Images