CN113280122B - Electric valve and refrigeration cycle system - Google Patents

Electric valve and refrigeration cycle system Download PDF

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Publication number
CN113280122B
CN113280122B CN202110076182.0A CN202110076182A CN113280122B CN 113280122 B CN113280122 B CN 113280122B CN 202110076182 A CN202110076182 A CN 202110076182A CN 113280122 B CN113280122 B CN 113280122B
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China
Prior art keywords
valve
sub
main valve
main
port
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CN202110076182.0A
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CN113280122A (en
Inventor
中川大树
小池亮司
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Saginomiya Seisakusho Inc
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Saginomiya Seisakusho Inc
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Priority to CN202310347270.9A priority Critical patent/CN116292917A/en
Publication of CN113280122A publication Critical patent/CN113280122A/en
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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
    • 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
    • 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
    • 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
    • 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
    • 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
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F25B41/35—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • 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 having two-stage flow control area, which makes a main valve core in a state of being seated on a main valve seat, and performs flow control of refrigerant in a small flow control area by a throttling part formed between a sub valve port of the main valve core and a needle valve, and the electric valve improves silence in the small flow control area. The electric valve is provided with a main valve core which is arranged in the main valve chamber (1R) and opens and closes a main valve port (13 a) which opens to the main valve chamber (1R). The valve device is provided with a sub valve body (4) which moves along the axis (L) direction of a sub valve port (3 a) formed on the main valve body (3) and controls the opening degree of the sub valve port (3 a). The sub-valve body 4 is provided with a needle valve 42 inserted in the axial line L direction relative to the sub-valve port 3a. A main valve element (3) is provided with a throttle flow path (3C) which communicates from a main valve chamber (1R) to a throttle section (C) between a sub valve port (3 a) and a needle valve (42) in a direction intersecting an axis (L) and has a uniform flow path cross-sectional area.

Description

Electric valve and refrigeration cycle system
Technical Field
The present invention relates to an electrically operated valve used in a refrigeration cycle or the like and a refrigeration cycle.
Background
Currently, as an electric valve provided in a refrigeration cycle of an air conditioner, there is an electric valve that performs flow rate control in a small flow rate control area and a large flow rate control area. Such a motor-operated valve has applications (e.g., a dehumidification valve) to be mounted on an indoor unit, and is disclosed in, for example, japanese patent application laid-open No. 2019-132347 (patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2019-132347
Disclosure of Invention
Problems to be solved by the invention
In such a motor-operated valve, a small flow rate control region is a region in which, for example, a dehumidification operation is performed, and in the small flow rate control region, a main valve port of a main valve seat is fully closed by a main valve body, and refrigerant passes through a throttle portion formed between a sub valve port of the main valve body and a needle valve (sub valve body). However, in the conventional motor-operated valve described above, in the small flow rate control region, the fluid flows from the valve chamber (main valve chamber) into the sub-valve chamber through the communication hole, and the fluid flows out from the throttle portion between the sub-valve port and the sub-valve body through the sub-valve chamber. Therefore, the fluid flowing from the main valve chamber to the throttle portion temporarily expands when flowing from the pilot hole to the sub valve chamber. As a result, there is a problem that the sub valve body generates noise due to pressure fluctuation vibration of the refrigerant in the sub valve chamber.
The present invention addresses the problem of providing an electrically operated valve having a two-stage flow rate control region, the electrically operated valve having a main valve element in a state of being seated on a main valve seat, wherein flow rate control of refrigerant in a small flow rate control region is performed by a throttle portion formed between a sub valve port of the main valve element and a needle valve, and the electrically operated valve improves quietness in the small flow rate control region.
Means for solving the problems
An electric valve according to the present invention includes a main valve body provided in a main valve chamber of a valve main body and opening and closing a main valve port opening to the main valve chamber, and a sub valve body moving in an axial direction of a 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 large flow rate control region where an opening degree of the main valve port is controlled by the main valve body to flow a fluid and a small flow rate control region where the main valve port is closed by the main valve body and the fluid is throttled by a throttle portion between the sub valve port and the sub valve body, and wherein the sub valve body has a needle valve inserted into the sub valve port in the axial direction, and the main valve body is provided with a throttle flow path having a flow path cross-sectional area that is uniform from the main valve chamber to the throttle portion between the sub valve port and the sub valve port in a direction intersecting the axial direction.
In this case, it is preferable that the electric valve be configured such that a needle guide hole coaxial with the sub valve port and opposed to the sub valve port is formed in the main valve body, the needle of the sub valve body has a straight portion in the axial direction, and the straight portion is guided on the axial direction by the needle guide hole.
Preferably, the electric valve has a feature that the needle guide hole intersects the throttle channel along the axis.
Further, it is preferable that the motor-operated valve has a plurality of throttle flow passages formed around the axis and at positions rotationally symmetrical around the axis.
Preferably, the motor-operated valve has a feature that the sum of the flow path cross-sectional areas of the plurality of throttle flow paths is set to be larger than the flow path cross-sectional area of the sub-valve port.
Preferably, the motor-operated valve further includes a cylindrical expansion hole formed inside a lower portion of the main valve body, the expansion hole communicating with a lower opening of the sub valve port and having an inner diameter larger than an inner diameter of the sub valve port, and a noise reduction member is disposed at an opening portion of the throttle flow path of the main valve body on the main valve chamber side and/or an opening portion of the expansion hole.
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 motor-operated valve is used as the dehumidification valve.
The effects of the invention are as follows.
According to the motor-operated valve and the refrigeration cycle system of the present invention, in a state where the flow rate is controlled to be small by the throttle portion (gap) between the sub valve body and the sub valve port, the fluid flowing from the main valve chamber to the throttle portion passes through only the throttle flow passage having a uniform flow passage cross-sectional area, the pressure fluctuation of the refrigerant is suppressed, the state of the refrigerant is stabilized, the needle valve is guided to the vicinity of the sub valve port by the needle valve guide hole, the vibration of the sub valve body and the like can be suppressed, and the silencing property is improved by providing the silencing member at the opening portion on the valve chamber side of the throttle flow passage of the main valve body and/or the opening portion of the expansion valve.
Drawings
Fig. 1 is a longitudinal sectional view of a small flow rate control area state of an electrically operated valve according to an embodiment of the present invention.
Fig. 2 is a longitudinal cross-sectional view of a main portion of the sub-valve body of the electric valve according to the embodiment in a slightly raised state from the state of the small flow rate control region in fig. 1.
Fig. 3 is an enlarged view showing a modification of the main valve element in the motor-operated valve according to the embodiment.
Fig. 4 is a diagram showing a refrigeration cycle system according to an embodiment of the present invention.
In the figure:
1-a valve housing, 1R-a main valve chamber, 11-a first joint pipe, 12-a second joint pipe, 13-a main valve seat, 13 a-a main valve port, L-an axis, C-a throttle portion, 2-a guide member, 2A-a guide hole, 24-a holder portion, 24 a-an internal thread portion, 3-a main valve spool, 31-a main valve portion, 32-a holding portion, 3 a-an auxiliary valve port, 3B-a valve needle guide hole, 3C-a throttle flow path, 4-an auxiliary valve spool, 41-a guide boss portion, 42-a needle valve, 42A-a straight portion, 42B-a valve needle, 5-a driving portion, 5A-a stepping motor, 5B-a screw feed mechanism, 5C-a limit mechanism, 51-a rotor shaft, 51 a-an external thread portion, 52-a magnetic rotor, 53-a stator coil, 91-a first indoor side heat exchanger, 92-a second indoor side heat exchanger, 93-an electronic expansion valve, 94-an outdoor side heat exchanger, 95-a compressor, 96-a four-a valve, and a motor valve.
Detailed Description
Next, embodiments of an electric valve and a refrigeration cycle system according to the present invention will be described with reference to the drawings. Fig. 1 is a longitudinal sectional view showing a small flow rate control range state of an electric valve according to an embodiment, and fig. 2 is a main-part enlarged longitudinal sectional view showing a state in which a sub-valve body of the electric valve according to the embodiment is slightly raised from the small flow rate control range state shown in fig. 1. Note that the concept of "top and bottom" in the following description corresponds to the top and bottom 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 element 3, a sub valve element 4, and a drive unit 5.
The valve housing 1 is formed into a substantially cylindrical shape, for example, from 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 that extends downward from the lower end. A main valve seat 13 is formed on the valve housing 1 on the main valve chamber 1R side of the second joint pipe 12, and the inside 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 communicated with the main valve chamber 1R through the main valve port 13a. The first joint pipe 11 and the second joint pipe 12 are fixed to the valve housing 1 by brazing or the like.
A guide member 2 is attached to an opening portion at the upper end of the valve housing 1. The guide member 2 has: a press-in portion 21 that is press-fitted into the inner peripheral surface of the valve housing 1; substantially cylindrical guide portions 22 and 23 having a diameter smaller than that of the press-fitting portion 21 and located above and below the press-fitting portion 21; a bracket portion 24 extending above the upper guide portion 22; and an annular flange portion 25 provided on the outer periphery of the press-fitting portion 21. The press-fitting portion 21, the guide portions 22 and 23, and the holder portion 24 are formed as a single resin member. The flange portion 25 is a metal plate such as brass or stainless steel, for example, and the flange portion 25 is integrally provided 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 via the flange portion 25. 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 23, and a female screw portion 24a coaxial with the guide hole 2A and a screw hole thereof are formed at the center of the holder portion 24. Further, the main valve element 3 is disposed inside the guide hole 2A inside the lower guide portion 23.
The main valve body 3 includes a main valve portion 31 that seats on and unseats from the main valve seat 13, and a holding portion 32 that holds the sub valve body 4. A cylindrical inflation hole 3A is formed inside the main valve portion 31, and a cylindrical sub-valve guide hole 3B is formed inside the holding portion 32. A cylindrical sub valve port 3A that opens in the inflation hole 3A about the axis L is formed between the main valve portion 31 and the holding portion 32, and a cylindrical valve needle guide hole 3B that is coaxial with the axis L is formed on the sub valve guide hole 3B side.
A throttle flow path 3C is formed at a connection portion between the main valve portion 31 and the holding portion 32 of the main valve body 3, and communicates with a throttle portion C (fig. 2) between the sub valve port 3a and a needle 42 described below in a direction intersecting the axis L from the main valve chamber 1R. The throttle flow path 3c is formed in a cylindrical shape having a constant flow path cross-sectional area from the main valve chamber 1R side to the sub valve port 3a side. In this embodiment, a plurality of (for example, four) throttle channels 3c are radially formed at positions to be rotated in the direction around the axis L. The total flow path cross-sectional area of the four throttle flow paths 3c is set larger than the flow path cross-sectional area of the sub-valve port 3a. The "flow path cross-sectional area" refers to a cross-sectional area in a plane perpendicular to the direction in which the fluid flows. Here, an example is shown in which four throttle flow paths 3c are provided, but two or more throttle flow paths 3c may be provided as long as the sum of the flow path cross-sectional areas of the throttle flow paths is set larger than the flow path area of the sub valve port 3a.
The main valve element 3 includes a retainer 34 at an upper end of the retaining portion 32, a main valve spring 35 between the retainer 34 and an upper end of the guide hole 2A of the guide member 2, and the main valve spring 35 biases the main valve element 3 in the direction of the main valve seat 13 (closing direction).
The sub-valve 4 is formed integrally with the rotor shaft 51 at the lower end of the rotor shaft 51, and the sub-valve 4 is composed of a guide boss 41 and a needle valve 42. As shown in fig. 2, the needle valve 42 of the sub-valve 4 is inserted in the direction of the axis L into the sub-valve port 3a, and the needle valve 42 is composed of a straight portion 42a and a needle 42b that decreases in diameter toward the tip end side, and the straight portion 42a is composed of a circular column having the axis L as the center line. The straight portion 42a has an outer diameter slightly smaller than the inner diameter of the sub-valve port 3a, and a throttle portion C (a portion surrounded by a single-dot chain line circle) is formed between the straight portion 42a and the sub-valve port 3a or between the needle 42b and the sub-valve port 3a. Then, a small flow rate of the refrigerant is caused to flow through the throttle portion C to perform a small flow rate control. An annular washer 43 made of a lubricating resin is disposed at the upper end of the guide boss 41, and the washer 43 and the guide boss 41 are slidably inserted into the sub-valve guide hole 3B.
The straight portion 42a of the needle valve 42 is slidably guided along the inner periphery of the needle guide hole 3b intersecting the orifice flow path 3c along the axis L in the vicinity of the sub-valve port 3a.
A housing 14 is airtightly fixed to the upper end of the valve housing 1 by welding or the like, and a driving portion 5 is formed inside and outside the housing 14. The drive unit 5 includes a stepping motor 5A, a screw feed mechanism 5B that advances and retracts the sub-valve body 4 by rotation of the stepping motor 5A, and a stopper mechanism 5C that restricts 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, a stator coil 53 disposed on the outer periphery of the housing 14 so as to face the magnetic rotor 52, and other unshown yokes, exterior members, and the like. 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 into 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 feeding mechanism 5B. A cylindrical portion 14a that holds the rotation restricting mechanism 5C is provided at the inner top portion of the housing 14, and a guide member 52 that guides 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 axis L direction together with the magnetic rotor 52 by the screw feeding mechanism 5B in which the male screw portion 51a of the rotor shaft 51 and the female screw portion 24a of the guide member 2. Then, the sub-valve body 4 moves forward and backward in the direction of the axis L, and the needle valve 42 approaches and separates from the sub-valve port 3a. When the needle 42 is lifted, the washer 43 engages with the holder 34 of the main valve body 3, and the main valve body 3 moves together with the sub valve body 4 and is unseated from the main valve seat 13. The magnetic rotor 52 is provided with a projection 52a, and the projection 52a regulates the lowermost end position and the uppermost end position of the rotor shaft 51 (and the magnetic rotor 52) by operating the rotation limiting mechanism 5C in accordance with the rotation of the magnetic rotor 52.
In the small flow rate control region state of fig. 1, in a state where the main valve body 3 is seated on the main valve seat 13, the main valve port 13a is closed, and the opening degree of the sub valve port 3a is controlled by the needle valve 42 of the sub valve body 4, whereby the small flow rate is controlled. At this time, the refrigerant in the main valve chamber 1R flows through the throttle flow path 3C to the throttle portion C, but flows to the throttle portion C at a stable pressure due to the uniform flow path cross-sectional area of the throttle flow path 3C. The refrigerant expands when flowing out from the throttle portion C to the expansion hole 3A. That is, since the flow of the refrigerant is stabilized until the refrigerant passes through the throttle portion C from the main valve chamber 1R, vibration of the motor-operated valve and the like can be prevented.
Further, since the plurality of throttle channels 3c are provided at positions rotationally symmetrical about the axis L, it is possible to suppress a force that is greatly biased in a direction intersecting the axis L by the refrigerant passing through the throttle channels 3c against the needle valve 42, and further, since the straight portion 42a of the needle valve 42 is guided by the needle guide hole 3b in the vicinity of the position immediately above the sub-valve port 3a, it is possible to further suppress vibration of the sub-valve body 4 caused by the flow of the refrigerant.
Further, although the needle 42a of the needle valve 42 advances and retreats with respect to the sub-valve port 3a, the flow path cross-sectional area of the throttle portion C, which is a gap between the outer periphery of the needle 42a and the sub-valve port 3a, is always smaller than the total flow path cross-sectional area of the plurality of throttle flow paths 3C. This allows the flow rate of the sub-valve body 4 to be controlled at a low level with high accuracy without being affected by the throttle flow path 3c.
Fig. 3 is a main part enlarged vertical cross-sectional view showing a state of a small flow rate control region of a modification of the motor-operated valve according to the embodiment, and in the modification described below, the overall configuration of the motor-operated valve other than its characteristic parts is the same as that of fig. 1 and 2. In this modification, the main valve portion 31 and the holding portion 32 are formed of different members in the main valve body 3', a noise cancellation member 36 is disposed at an opening portion of the expansion hole 3A of the main valve portion 31, and a noise cancellation member 37 is disposed at a connecting portion between the holding portion 32 and the main valve portion 31 and distributed to an opening portion of the throttle flow path 3c on the main valve chamber 1R side. This allows the sound of refrigerant passing through to be absorbed by the muffler members 36 and 37, thereby further improving the silencing effect. Further, only one of the muffler members 36 and 37 may be used.
Fig. 4 is a diagram showing a refrigeration cycle system according to an embodiment of the present invention, and the refrigeration cycle system according to the embodiment will be described based on this diagram. The refrigeration cycle is used for an air conditioner such as a household air conditioner. The motor-operated valve 100 of the above embodiment is provided between the first indoor-side heat exchanger 91 (which operates as a cooler during dehumidification) and the second indoor-side heat exchanger 92 (which operates as a heater during dehumidification) of the air conditioner, and constitutes a heat pump refrigeration cycle together with the compressor 95, the four-way valve 96, the outdoor-side heat exchanger 94, and the electronic expansion valve 93. The first indoor heat exchanger 91, the second indoor heat exchanger 92, and the motor-operated valve 100 are installed indoors, and the compressor 95, the four-way valve 96, the outdoor heat exchanger 94, and the electronic expansion valve 93 are installed outdoors, thereby constituting a cooling/heating apparatus.
In the motor-operated valve 100 as the dehumidification valve according to the embodiment, the main valve is fully opened during cooling or heating other than dehumidification, and the first indoor heat exchanger 91 and the second indoor heat exchanger 92 are one indoor heat exchanger. The integrated indoor and outdoor heat exchangers 94 alternatively function as "evaporators" or "condensers". 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 includes other configurations and the like that can achieve the object of the present invention, and the present invention also includes modifications and the like described below. For example, although the electrically operated valve 100 used in an air conditioner such as a home air conditioner has been described in the above embodiment, the electrically operated valve of the present invention is not limited to a home air conditioner, and may be a commercial air conditioner, and may be applied to various refrigerators, etc. without being limited to an air conditioner.
While the embodiments of the present invention have been described above with reference to the drawings, other embodiments are also described in detail, but the specific configurations are not limited to the above embodiments, and design changes and the like within a range not departing from the gist of the present invention are also included in the present invention.

Claims (7)

1. An electric valve includes a main valve body provided in a main valve chamber of a valve body and opening and closing a main valve port opening to the main valve chamber, and a sub valve body moving in an axial direction of a sub valve port formed in the main valve body to control an opening degree of the sub valve port,
the electric valve is a two-stage electric valve having a large flow rate control region in which the opening degree of the main valve port is controlled by the main valve element to cause a fluid to flow, and a small flow rate control region in which the opening degree is controlled by closing the main valve port by the main valve element and variably throttling the fluid by a throttling portion between the sub valve port and the sub valve element to cause the fluid to flow,
the above-mentioned electric valve is characterized in that,
the main valve body has a main valve chamber, a sub valve port, and a throttle flow path having a flow path cross-sectional area that is uniform in a direction intersecting the axis line from the main valve chamber to the throttle portion between the sub valve port and the needle valve.
2. Electrically operated valve according to claim 1,
a needle guide hole coaxial with the sub-valve port and opposed to the sub-valve port is formed in the main valve body, and the needle of the sub-valve body has a straight portion in the axial direction, and the straight portion is guided on the axis by the needle guide hole.
3. Electrically operated valve according to claim 2,
the valve needle guide hole intersects the throttle flow path along the axis.
4. Electrically operated valve according to any of claims 1 to 3,
the throttle flow passage is formed in plurality around the axis, and the plurality of throttle flow passages are formed at positions rotationally symmetrical around the axis.
5. Electrically operated valve according to claim 4,
the sum of the flow path cross-sectional areas of the plurality of throttle flow paths is set to be larger than the flow path cross-sectional area of the sub-valve port.
6. Electrically operated valve according to any of claims 1 to 3,
a cylindrical expansion hole having an inner diameter larger than the inner diameter of the sub valve port and communicating with the lower opening of the sub valve port is formed inside the lower portion of the main valve body,
a sound deadening member is disposed at an opening of the throttle flow path of the main valve element on the main valve chamber side and/or an opening of the expansion hole.
7. A refrigeration cycle system comprising a compressor, an indoor heat exchanger, an outdoor heat exchanger, an electronic expansion valve disposed between the indoor heat exchanger and the outdoor heat exchanger, and a dehumidification valve disposed in the indoor heat exchanger, the refrigeration cycle system being characterized in that,
use of an electrically operated valve as claimed in any one of claims 1 to 6 as the above-mentioned dehumidification valve.
CN202110076182.0A 2020-02-19 2021-01-20 Electric valve and refrigeration cycle system Active CN113280122B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310347270.9A CN116292917A (en) 2020-02-19 2021-01-20 Electric valve and refrigeration cycle system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020026341A JP7361628B2 (en) 2020-02-19 2020-02-19 Electric valve and refrigeration cycle system
JP2020-026341 2020-02-19

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CN202310347270.9A Division CN116292917A (en) 2020-02-19 2021-01-20 Electric valve and refrigeration cycle system

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