CN117905928A - Electric valve and refrigeration cycle system - Google Patents
Electric valve and refrigeration cycle system Download PDFInfo
- Publication number
- CN117905928A CN117905928A CN202410249476.2A CN202410249476A CN117905928A CN 117905928 A CN117905928 A CN 117905928A CN 202410249476 A CN202410249476 A CN 202410249476A CN 117905928 A CN117905928 A CN 117905928A
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- Prior art keywords
- valve
- main valve
- port
- main
- sub
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 17
- 238000004891 communication Methods 0.000 claims abstract description 58
- 239000012530 fluid Substances 0.000 claims abstract description 29
- 238000007791 dehumidification Methods 0.000 claims description 9
- 239000003507 refrigerant Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/44—Details of seats or valve members of double-seat valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Lift Valve (AREA)
Abstract
The invention provides an electric valve and a refrigeration cycle system. In a two-stage electric valve for controlling a flow rate in a small flow rate control region and controlling a flow rate in a large flow rate region in which a main valve port is fully opened by a main valve element, the flow of fluid is stabilized against the flow of the main valve element and the main valve port during the large flow rate region control, and the generation of noise and vibration of the electric valve itself is suppressed. The valve has a main valve element (3) provided in a main valve chamber (1R) and opening and closing a main valve port (13 a). The valve is provided with a sub valve element (4) which moves along the axis L direction of a sub valve port (3 a) formed on a main valve element to control the opening degree of the sub valve port. The sub valve body is provided with a needle valve (42) inserted into a sub valve port along the direction of the axis L. A communication hole (3 b) for communicating the main valve chamber with the auxiliary valve chamber (3R) is provided in the main valve element. When the main valve is fully opened, at least the communication hole located on the inlet port (11 a) side of the communication holes is located at a position not directly opposite to the inlet port.
Description
The application is a divisional application; the application number of the parent case is '2021108507141', and the application name is 'electric valve and refrigeration cycle system'.
Technical Field
The present invention relates to an electrically operated valve used in a refrigeration cycle system and the like, and a refrigeration cycle system.
Background
Conventionally, as an electric valve provided in a refrigeration cycle of an air conditioner, there is an electric valve that performs flow control in a small flow control region and a large flow region. Such an electric valve is used for an indoor unit (for example, a dehumidification valve), and is disclosed in, for example, japanese patent application laid-open No. 2017-211034 (patent document 1).
The electrically operated valve of patent document 1 includes a main valve body (valve body 32) and a sub valve body (valve shaft 20), and performs small flow rate control in which refrigerant passes from a communication passage (29 w) of the sub valve body to a sub valve port (valve port 36) of the main valve body through the inside of the sub valve body. When the main valve is fully opened, most of the fluid (refrigerant) flows to the main valve port (valve port 16) which is a gap between the main valve and the main valve seat, but a part of the fluid flows from the communication passage (29 w) of the sub valve to the sub valve port of the main valve (paragraph [0050] of patent document 1).
As such an electrically operated valve, for example, an electrically operated valve shown in fig. 7 is considered. The electric valve is provided with: a main valve spool c for opening and closing the main valve port b in the main valve chamber aR of the valve main body a; and a sub valve body e for controlling the opening degree of the sub valve port d in the sub valve chamber cR formed in the main valve body c. The present invention is a two-stage electric valve having a small flow rate control region in which a main valve port b is fully closed by a main valve element c and the opening degree of a sub valve port d is controlled by a sub valve element e to throttle a fluid, and a large flow rate region in which the main valve port b is fully opened by the main valve element c and the fluid flowing in from an inlet port g of a first joint pipe f flows into the main valve port b.
Prior art literature
Patent document 1: japanese patent laid-open No. 2017-211034
In the electrically operated valve of patent document 1, when the main spool is fully opened (large flow rate region), a part of the fluid flows from the communication passage (29 w) of the sub spool to the sub port of the main spool, and therefore the flow rate and pressure in the valve chamber are disturbed, and the flow of the fluid becomes unstable, which may cause noise and vibration. In the electric valve shown in fig. 7, in the fully opened state (large flow rate range) of the main valve element c, fluid mainly passes between the main valve element c and the main valve port b from the main valve chamber aR, passes through the sub valve chamber cR inside the main valve element c from the communication hole h provided in the main valve element c, and also flows between the sub valve element e and the sub valve port d. Therefore, the velocity and pressure behavior of the fluid flowing through the main valve port b are not stabilized due to the flow throttled by the sub valve port d, and there is a concern that vibration of the main valve body c and refrigerant passing sound may occur.
Disclosure of Invention
The invention aims to control the flow rate of a small flow rate control region of a refrigerant by a main valve body in a fully closed state and a throttle part formed between a secondary valve port and the secondary valve body of the main valve body, and to control the flow rate of a fluid to a large flow rate region of the main valve body by the main valve body in a fully opened state.
The electric valve of the present invention comprises: a main valve body provided in a main valve chamber of the valve body and opening and closing a main valve port opening to the main valve chamber; and a sub valve body that is formed in a sub valve chamber of the main valve body and moves in an axial direction of the sub valve port formed in the main valve body to control an opening degree of the sub valve port, wherein the electric valve is a two-stage electric valve having a small flow rate control region in which the main valve port is closed by the main valve body and an opening degree of the sub valve port is controlled by the sub valve body to throttle a fluid, and a large flow rate region in which the main valve port is fully opened by the main valve body and a fluid flowing from an inlet port opening to the main valve chamber at a side portion of the main valve body flows to the main valve port, and wherein the electric valve is provided with a communication hole that communicates from the main valve chamber to the sub valve chamber, and wherein, when the main valve body is fully opened, at least a communication hole located on the inlet port side of the communication hole is provided at a position that is not directly opposed to the opening of the inlet port.
In this case, it is preferable that the electric valve is characterized in that, when the main valve is fully opened, at least a communication hole located on the inlet port side among the communication holes is located in a lower guide portion of a guide member that guides the main valve.
Preferably, the electric valve is characterized in that, when the main valve element is fully opened, at least a communication hole located on the inlet port side among the communication holes is located at a position offset from a front of the opening of the inlet port.
Preferably, the electric valve is configured such that, when the main valve element is fully opened, at least a central axis of a communication hole located on the inlet port side of the communication hole intersects with a central axis of the inlet port when projected on a plane perpendicular to an axis L of the main valve port.
The refrigeration cycle system of the present invention includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, an electronic expansion valve provided between the indoor heat exchanger and the outdoor heat exchanger, and a dehumidification valve provided in the indoor heat exchanger, and is characterized in that the electric valve is used as the dehumidification valve.
The effects of the present invention are as follows.
According to the electric valve and the refrigeration cycle of the present invention, when the main spool is fully opened, the fluid flowing from the inlet port into the main valve chamber is not directly injected into the communication hole, and thus the inflow of the fluid from the communication hole into the sub valve chamber can be reduced. Therefore, the flow of the fluid with respect to the main valve body and the main valve port can be stabilized, and generation of noise and vibration of the electric valve itself can be suppressed.
Drawings
Fig. 1 is a longitudinal sectional view of an electrically operated valve according to a first embodiment of the present invention in a state of a small flow rate control region.
Fig. 2 is a longitudinal sectional view of the motor-operated valve according to the first embodiment in a state of a large flow area.
Fig. 3 (a) is an enlarged longitudinal section of a main portion of the large flow area state of the motor-operated valve according to the second embodiment of the present invention, and fig. 3 (B) is an enlarged cross section of a main portion projected onto a plane perpendicular to the axis L of the main valve port.
Fig. 4 is an enlarged longitudinal sectional view of a main part of a large flow area state of an electrically operated valve according to a third embodiment of the present invention.
Fig. 5 is an enlarged cross-sectional view of a main portion of the electric valve according to the fourth embodiment of the present invention, in which the communication hole and the inlet port in the large flow area state are projected onto a plane perpendicular to the axis L of the main valve port.
Fig. 6 is a diagram showing a refrigeration cycle according to an embodiment of the present invention.
Fig. 7 is a diagram illustrating an example of a two-stage motor-operated valve and a problem thereof.
In the figure: 1-valve housing, 1R-main valve chamber, 11-first joint pipe, 11 a-inlet port, 12-second joint pipe, 13-main valve seat, 13A-main valve port, L-axis, 2', 2 "-main screw member, 2A-guide, 22-upper guide portion, 25-lower guide portion, 23-bracket portion, 23A-female screw portion, 3-main valve core, 31-main valve portion, 32-retainer portion, 3A-auxiliary valve port, 3B-communication hole, 3A-auxiliary valve chamber, 4-auxiliary valve core, 41-guide boss portion, 42-needle valve, 5-driving portion, 5A-step motor, 5B-screw feeding mechanism, 5C-stopper mechanism, 51-rotor shaft, 51 a-male screw portion, 52-magnetic rotor, 53-stator coil, 91-first indoor side heat exchanger, 92-second indoor side heat exchanger, 93-electronic expansion valve, 94-outdoor side heat exchanger, 95-compressor, 96-four-way valve, 100-electric valve.
Detailed Description
Embodiments of an electrically operated valve and a refrigeration cycle system according to the present invention will be described below with reference to the drawings. Fig. 1 is a longitudinal sectional view of the electric valve according to the first embodiment in a small flow rate control region state, and fig. 2 is a longitudinal sectional view of the electric valve according to the first embodiment in a large flow rate region state. The concept of "up and down" in the following description corresponds to up and down in the drawings of fig. 1 and 2. The motor-operated valve 100 includes a valve housing 1, a guide member 2, a main valve body 3, a sub valve body 4, and a driving unit 5.
The valve housing 1 is formed into a substantially cylindrical shape, for example, of brass, stainless steel, or the like, and has a main valve chamber 1R inside thereof. A first joint pipe 11 that communicates with the main valve chamber 1R is connected to one side of the outer periphery of the valve housing 1, and a second joint pipe 12 is connected to a cylindrical portion extending downward from the lower end. A main valve seat 13 is formed on the main valve chamber 1R side of the second joint pipe 12 of the valve housing 1, and the inner side of the main valve seat 13 serves as a main valve port 13a. The main valve port 13a is a cylindrical through hole (through hole) centered on the axis L, and the second joint pipe 12 is in communication with the main valve chamber 1R via the main valve port 13a. The inner end of the first joint pipe 11 on the main valve chamber 1R side serves as an inlet port 11a.
A guide member 2 is attached to an opening at the upper end of the valve housing 1. The guide member 2 has: a press-fit portion 21 press-fitted into the inner peripheral surface of the valve housing 1; a substantially cylindrical upper guide 22 located above the press-fitting portion 21; a bracket 23 extending to the upper part of the upper guide 22; an annular flange portion 24 provided on the outer periphery of the press-fitting portion 21; and a substantially cylindrical lower guide portion 25 located below from the press-in portion 21. The press-fitting portion 21, the upper guide portion 22, the lower guide portion 25, and the bracket portion 23 are formed as a resin integrated product. The flange 24 is made of, for example, a metal plate such as brass or stainless steel, and the flange 24 is integrally formed with the resin press-fitting portion 21 by insert molding.
The guide member 2 is assembled to the valve housing 1 by the press-fitting portion 21, and is fixed to the upper end portion of the valve housing 1 by welding through the flange portion 24. In the guide member 2, a cylindrical guide hole 2A coaxial with the axis L is formed inside the press-fitting portion 21 and the upper and lower guide portions 22 and 25, and a female screw portion 23a coaxial with the guide hole 2A and a screw hole thereof are formed in the center of the bracket portion 23. A main valve body 3 is disposed in the pilot hole 2A.
The main valve body 3 is composed of a main valve portion 31 that is seated on and unseated from the main valve seat 13, and a holding portion 32 that holds the sub valve body 4. A cylindrical expansion hole 3A is formed inside the main valve portion 31, and a cylindrical sub-valve chamber 3R is formed inside the holding portion 32, and an inner peripheral surface of the sub-valve chamber 3R becomes a sub-valve guide hole 3B. A cylindrical auxiliary valve port 3A is formed between the main valve portion 31 and the holding portion 32, and the cylindrical auxiliary valve port 3A opens from the auxiliary valve chamber 3R toward the expansion hole 3A around the axis L.
Further, a communication path 3b that communicates from the main valve chamber 1R to the sub valve chamber 3R in a direction intersecting the axis L is formed in a side surface of the holding portion 32 of the main valve spool 3. In this embodiment, a plurality of (for example, four) communication passages 3b are radially formed at positions rotationally symmetrical about the axis L. The four communication paths 3b are formed at positions not directly opposed to the inlet port 11a which is the opening of the first joint pipe 11 in the direction of the axis L. Although the four communication paths 3b are shown here, any configuration may be used as long as they do not directly face the inlet port 11 a.
The main valve body 3 has a stopper 34 at an upper end portion of the holding portion 32, and a main valve spring 35 between the stopper 34 and an upper end portion of the guide hole 2A of the guide member 2, and the main valve body 3 is biased in a direction (closing direction) of the main valve seat 13 by the main valve spring 35. The sub-valve body 4 is formed integrally with the rotor shaft 51 at the lower end portion of the rotor shaft 51, and the sub-valve body 4 is constituted by the guide boss 41 and the needle valve 42. The needle valve 42 of the sub valve body 4 is a member whose tip end is inserted into the sub valve port 3a in the direction of the axis L, and small flow rate control is performed by flowing a small flow rate of refrigerant through a gap between the needle valve 42 and the sub valve port 3 a. An annular gasket 43 made of a lubricating resin is disposed at the upper end of the guide boss 41, and the guide boss 41 is slidably inserted into the sub valve guide hole 3B.
A housing 14 is hermetically fixed to the upper end of the valve housing 1 by welding or the like, and the driving section 5 is formed inside and outside the housing 14. The driving unit 5 includes a stepping motor 5A, a screw feed mechanism 5B for advancing and retreating the sub-valve body 4 by rotation of the stepping motor 5A, and a stopper mechanism 5C for restricting rotation of the stepping motor 5A.
The stepping motor 5A includes a rotor shaft 51, a magnetic rotor 52 rotatably disposed inside the housing 14, and a stator coil 53 disposed on the outer periphery of the housing 14 so as to face the magnetic rotor 52; and a yoke, an exterior member, and the like, which are not shown. The rotor shaft 51 is attached to the center of the magnetic rotor 52 via a sleeve, and a male screw portion 51a is formed on the outer periphery of the rotor shaft 51 on the guide member 2 side. The male screw portion 51a is screwed with the female screw portion 24a of the guide member 2, whereby the guide member 2 supports the rotor shaft 51 on the axis L. The female screw portion 24a of the guide member 2 and the male screw portion 51a of the rotor shaft 51 constitute a screw feed mechanism 5B. Further, a cylindrical portion 14a for holding the rotation limiting mechanism 5C is provided in the inner ceiling portion of the housing 14, and a guide member 54 for guiding the upper end of the rotor shaft 51 is disposed in the cylindrical portion 14 a.
According to the above configuration, when the stepping motor 5A is driven, the magnetic rotor 52 and the rotor shaft 51 rotate, and the rotor shaft 51 moves in the direction of the axis L together with the magnetic rotor 52 by the screw feed mechanism 5B of the male screw portion 51a of the rotor shaft 51 and the female screw portion 24a of the guide member 2. The sub valve body 4 is moved forward and backward in the direction of the axis L, and the needle valve 42 approaches or separates from the sub valve port 3 a. When the needle valve 42 is lifted, the washer 43 engages with the stopper 34 of the main valve element 3, and the main valve element 3 moves together with the sub valve element 4, and is separated from the main valve seat 13. Further, a protrusion 52a is formed on the magnetic rotor 52, and the protrusion 52a operates the rotation limiting mechanism 5C to limit the lowermost position and the uppermost position of the rotor shaft 51 (and the magnetic rotor 52) in accordance with the rotation of the magnetic rotor 52.
In the small flow rate control region state of fig. 1, the main valve port 13a is closed in a state where the main valve element 3 is seated on the main valve seat 13, and the opening degree of the sub valve port 3a is controlled by the needle valve 42 of the sub valve element 4, so that the small flow rate is controlled. At this time, the communication passage 3b is located below the lower end of the lower guide portion 25 of the guide member 2, and the refrigerant in the main valve chamber 1R flows into the sub valve chamber 3R through the communication passage 3 b.
In the large flow rate region state of fig. 2, the refrigerant mainly passes from the main valve chamber 1R between the main valve portion 31 and the main valve port 13a of the main valve body 3, but in the fully opened state of the main valve body 3, the communication passage 3b is blocked from the inlet port 11a by the lower guide portion 25. Accordingly, the fluid flowing from the inlet port 11a into the main valve chamber 1R is not directly injected into the communication hole 3b, and thus the inflow of the fluid from the communication hole 3b into the sub valve chamber 3R can be reduced. Therefore, the flow of the fluid with respect to the main valve body 3 and the main valve port 13a can be stabilized, and the vibration of the main valve body 3 can be suppressed, and the generation of noise and vibration of the electric valve 100 can be suppressed.
Fig. 3 is a view showing a state of a large flow area of the motor-operated valve according to the second embodiment of the present invention, fig. 3 (a) is a main part enlarged longitudinal sectional view, and fig. 3 (B) is a main part enlarged transverse sectional view of the communication hole and the inlet port of fig. 3 (a) projected onto a plane perpendicular to the axis L of the main valve port. The difference from the first embodiment is that the length of the lower guide 25 of the guide member 2' opposite to the inlet port 11a is shortened, and the lower guide 25 on the inlet port 11a side is lengthened within a predetermined width, and a rotation stopper is provided so that the main valve element 3 does not rotate even when it moves in the vertical direction, although not shown. For example, a key portion protruding in the axial direction is formed on the inner periphery of the guide member 2', and the rotation stopper may be fitted into a longitudinal groove formed on the outer periphery of the main valve body 3 to prevent the rotation of the main valve body 3. In the first assembly of the valve, as shown in fig. 3 (a) and 3 (B), in the large flow rate region state, the position of the rotation stopper of the main valve body 3 may be set so that the communication hole 3B on the inlet port 11a side is shielded by the lower guide portion on the inlet port 11a side. Thus, in the second embodiment as well, in the same manner as in the first embodiment, the communication hole 3b on the inlet port 11a side is shielded by the lower guide 25 in the large flow area state. Therefore, the fluid flowing from the inlet port 11a into the main valve chamber 1R is not directly injected into the communication hole 3b, and thus the inflow of the fluid from the communication hole 3b into the sub valve chamber 3R can be reduced. Therefore, the flow of the fluid with respect to the main valve element 3 and the main valve port 13a can be stabilized, and the vibration of the main valve element 3 can be suppressed, and the generation of noise and vibration of the electric valve 100 can be suppressed.
In fig. 3, the axis of the communication hole 3B on the inlet port 11a side is in the same direction (parallel) with the axis of the inlet port 11a as shown in fig. 3B, but the present invention is not limited to this, and the communication hole 3B on the inlet port 11a side may be shielded as long as it enters the predetermined width of the lower guide 25 on the inlet port 11a side, so that the axis of the communication hole 3B on the inlet port 11a side may be set at a predetermined angle with the axis of the inlet port (not shown).
Fig. 4 is an enlarged cross-sectional view of a main part of a large flow area state of a third embodiment of the present invention, which is different from the first embodiment in that: there is no guide portion below the press-in portion 21 "of the guide member 2"; as shown in fig. 4, in the large flow rate region state, the communication path 3b moves to a position not directly opposed to the inlet port 11a as the opening of the first joint pipe 11 in the axis L direction, that is, a position spaced upward from the inlet port 11a in the axis L direction. Thus, in the third embodiment, the refrigerant mainly passes from the main valve chamber 1R between the main valve portion 31 and the main valve port 13a of the main valve body 3 in the large flow rate region state, but in the fully opened state of the main valve body 3, the fluid flowing into the main valve chamber 1R from the inlet port 11a is not directly injected into the communication hole 3b, so that the inflow of the fluid from the communication hole 3b into the sub valve chamber 3R can be reduced. Therefore, the flow of the fluid with respect to the main valve element 3 and the main valve port 13a can be stabilized, and the vibration of the main valve element 3 can be suppressed, and the generation of noise and vibration of the electric valve 100 can be suppressed.
In fig. 4, the axis of the communication hole 3b is set in the same direction as the axis of the inlet port 11a, but may be set in a different direction.
Fig. 5 is an enlarged cross-sectional view of a main portion of the large-flow area state communication path 3b and the inlet port 11a of the fourth embodiment of the present invention projected onto a plane perpendicular to the axis L, and is different from the third embodiment in that the communication hole 3b on the inlet port 11a side is located within a range of an inner diameter of an opening of the inlet port 11a in the axis L direction; the direction of the axis of the communication hole 3b and the direction of the axis of the inlet port 11a are not the same direction (parallel), but intersect as shown in fig. 5; although not shown, a rotation limiter is provided so that the main valve element 3 does not rotate even when it moves in the vertical direction. The rotation limiter is the same as the second embodiment, and even if the main valve body 3 moves in the L-axis direction, the angle formed by the axis of the communication hole 3b and the axis of the inlet port 11a does not change. As a result, even if the communication hole 3b is located within the range of the inner diameter of the opening of the inlet port 11a in the direction of the axis L, as shown in fig. 5, the fluid flowing from the inlet port 11a into the main valve chamber 1R is not directly injected into the communication hole 3b, and thus the inflow of the fluid from the communication hole 3b into the sub valve chamber 3R can be reduced. Therefore, the flow of the fluid with respect to the main valve element 3 and the main valve port 13a can be stabilized, and the vibration of the main valve element 3 can be suppressed, and the generation of noise and vibration of the electric valve 100 can be suppressed.
In the fourth embodiment, the angle α formed between the central axis of the communication hole 3b on the inlet port 11a side in fig. 5 and the central axis of the inlet port 11a is preferably 45 ° or more and 90 ° or less.
Fig. 6 is a diagram showing a refrigeration cycle according to an embodiment of the present invention, and the refrigeration cycle according to the embodiment will be described based on the diagram. The refrigeration cycle system is used for an air conditioner such as a household air conditioner. The electric valve 100 of the above embodiment is provided between the first indoor heat exchanger 91 (operating as a cooler in dehumidification) and the second indoor heat exchanger 92 (operating as a heater in dehumidification) of the air conditioner, and constitutes a heat pump refrigeration cycle together with the compressor 95, the four-way valve 96, the outdoor heat exchanger 94, and the electronic expansion valve 93. The first indoor heat exchanger 91, the second indoor heat exchanger 92, and the electric valve 100 are provided indoors, and the compressor 95, the four-way valve 96, the outdoor heat exchanger 94, and the electronic expansion valve 93 are provided outdoors to constitute a cooling/heating device.
In the electric valve 100 as the embodiment of the dehumidification valve, the main valve is fully opened during heating and cooling or heating other than during dehumidification, and the first indoor heat exchanger 91 and the second indoor heat exchanger 92 are one indoor heat exchanger. The integrated indoor heat exchanger and outdoor heat exchanger 94 functions alternatively as an "evaporator" and a "condenser". That is, the electric valve 93 as an electronic expansion valve is provided between the evaporator and the condenser.
The present invention is not limited to the above-described embodiments, and other configurations, etc., which can achieve the objects of the present invention, are included in the present invention, as are modifications, etc., shown below. For example, in the above embodiment, the electric valve 100 used for an air conditioner such as a home air conditioner is illustrated, but the electric valve of the present invention is not limited to a home air conditioner, and may be a service air conditioner, and may be applied to various refrigerators and the like without being limited to an air conditioner.
While the embodiments of the present invention have been described in detail with reference to the drawings and other embodiments have been described in detail, the specific configuration is not limited to these embodiments, and modifications of the design and the like that do not depart from the gist of the present invention are also included in the present invention.
Claims (4)
1. An electrically operated valve includes: a main valve body provided in a main valve chamber of the valve body and opening and closing a main valve port opening to the main valve chamber; and a sub valve element that moves in a sub valve chamber formed in the main valve element in an axial direction of a sub valve port formed in the main valve element to control an opening degree of the sub valve port,
The electric valve is a two-stage electric valve having a small flow rate control region in which the main valve port is closed by the main valve element and the opening degree of the sub valve port is controlled by the sub valve element to throttle a fluid, and a large flow rate region in which the main valve port is fully opened by the main valve element and a fluid flowing from an inlet port opening to the main valve chamber at a side portion of the main valve element flows into the main valve port,
The above-mentioned electric valve is characterized in that,
The main valve body is provided with a communication hole for communicating from the main valve chamber to the auxiliary valve chamber,
In the communication hole, at least the communication hole located on the inlet port side among the communication holes is provided at a position not directly opposed to the opening of the inlet port when the main valve is fully opened,
When the main valve is fully opened, at least one of the communication holes located on the inlet port side is located at a position offset from the front of the opening of the inlet port by being located at a position where the lower end surface is spaced upward from the upper end surface of the opening of the inlet port.
2. The electrically operated valve as set forth in claim 1, wherein,
When the main valve is fully opened, at least one of the communication holes located on the inlet port side is located in a lower guide portion of a guide member that guides the main valve.
3. The electrically operated valve as set forth in claim 1, wherein,
When the main valve is fully opened, at least a central axis of the communication hole located on the inlet port side of the communication holes intersects with a central axis of the inlet port when projected on a plane perpendicular to an axis L of the main valve port.
4. A refrigeration cycle system comprising a compressor, an indoor heat exchanger, an outdoor heat exchanger, an electronic expansion valve arranged between the indoor heat exchanger and the outdoor heat exchanger, and a dehumidification valve arranged on the indoor heat exchanger, the refrigeration cycle system is characterized in that,
Use of the electrically operated valve according to any one of claims 1 to 3 as the dehumidification valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-134532 | 2020-08-07 | ||
| JP2020134532A JP7372885B2 (en) | 2020-08-07 | 2020-08-07 | Electric valve and refrigeration cycle system |
| CN202110850714.1A CN114060581A (en) | 2020-08-07 | 2021-07-27 | Electric valve and refrigeration cycle system |
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| CN202110850714.1A Division CN114060581A (en) | 2020-08-07 | 2021-07-27 | Electric valve and refrigeration cycle system |
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| CN117905928A true CN117905928A (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110850714.1A Pending CN114060581A (en) | 2020-08-07 | 2021-07-27 | Electric valve and refrigeration cycle system |
| CN202410249476.2A Pending CN117905928A (en) | 2020-08-07 | 2021-07-27 | Electric valve and refrigeration cycle system |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110850714.1A Pending CN114060581A (en) | 2020-08-07 | 2021-07-27 | Electric valve and refrigeration cycle system |
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| CN114623272B (en) * | 2022-03-02 | 2024-03-26 | 吴忠仪表有限责任公司 | Three-section type large adjustable ratio control regulating valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2012117584A (en) | 2010-11-30 | 2012-06-21 | Saginomiya Seisakusho Inc | Electric flow control valve |
| CN103388694B (en) | 2012-05-11 | 2016-07-27 | 浙江三花股份有限公司 | A kind of electric expansion valve |
| CN103836851B (en) * | 2014-03-25 | 2016-06-22 | 浙江三花股份有限公司 | The valve component of a kind of electric expansion valve and manufacture method thereof |
| JP6272247B2 (en) * | 2015-02-02 | 2018-01-31 | 株式会社鷺宮製作所 | Throttle device and refrigeration cycle |
| JP6745141B2 (en) | 2016-05-26 | 2020-08-26 | 株式会社不二工機 | Flow control valve |
| JP6909740B2 (en) | 2018-01-31 | 2021-07-28 | 株式会社鷺宮製作所 | Electric valve and refrigeration cycle system |
| JP6857624B2 (en) | 2018-02-01 | 2021-04-14 | 株式会社鷺宮製作所 | Electric valve and refrigeration cycle system |
| JP6968768B2 (en) * | 2018-08-31 | 2021-11-17 | 株式会社鷺宮製作所 | Electric valve and refrigeration cycle system |
| JP6959900B2 (en) * | 2018-10-03 | 2021-11-05 | 株式会社鷺宮製作所 | Valve gear, motorized valves and refrigeration cycle system |
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| JP2022030466A (en) | 2022-02-18 |
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