CN111550565B - Electrically operated valve and refrigeration cycle system provided with same - Google Patents
Electrically operated valve and refrigeration cycle system provided with same Download PDFInfo
- Publication number
- CN111550565B CN111550565B CN202010034322.3A CN202010034322A CN111550565B CN 111550565 B CN111550565 B CN 111550565B CN 202010034322 A CN202010034322 A CN 202010034322A CN 111550565 B CN111550565 B CN 111550565B
- Authority
- CN
- China
- Prior art keywords
- valve
- port
- valve body
- electrically operated
- valve element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005057 refrigeration Methods 0.000 title claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims description 42
- 230000007246 mechanism Effects 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 abstract description 17
- 239000003507 refrigerant Substances 0.000 abstract description 15
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 description 9
- 238000001816 cooling Methods 0.000 description 8
- 230000008878 coupling Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- 239000011347 resin Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 3
- 239000010951 brass Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 238000005219 brazing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- 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
- F16K1/42—Valve seats
-
- 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift 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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion 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
Abstract
The invention provides an electric valve and a refrigeration cycle system with the electric valve, which can inhibit the generation of abnormal sound caused by fluid colliding with a valve core. In the valve body (36), a substantially semi-cylindrical protective wall (36WA) is integrally formed between the valve element (26) and the first port (32P) in the valve element housing section (36A) at the portion of the valve seat (36V) facing the first port (32P), and the protective wall (36WA) prevents the refrigerant immediately after flowing in through the first port (32P) from colliding with the valve element (26).
Description
Technical Field
The present invention relates to an electrically operated valve and a refrigeration cycle system provided with the electrically operated valve.
Background
In the refrigeration cycle, an electric valve is disposed as an expansion valve between the condenser and the evaporator. Such a motor-operated valve has been proposed in which, for example, as shown in patent document 1, in order to suppress noise generated by an impact force when bubbles generated in a refrigerant in a port portion of a valve port of a valve box are extinguished, the port portion of the valve port is gradually narrowed as it is separated from a surface of a valve seat which faces a valve element. Thereby, the outer peripheral surface of the valve body and the inner surface of the port portion become substantially parallel. As a result, since the gap between the inner surface of the port portion and the valve body is reliably prevented from rapidly changing in the longitudinal direction of the valve body, the pressure of the refrigerant does not rapidly drop in the port portion, and bubbles which cause noise are not generated in the refrigerant in the port portion.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2008-291928
Disclosure of Invention
Problems to be solved by the invention
In the motor-operated valve as shown in patent document 1, since the fluid immediately after being introduced into the valve chamber of the valve housing from the inlet port of the lateral joint connected to the valve housing directly collides with the conical flow rate adjustment portion in the valve body, the flow rate adjustment portion of the valve body may vibrate based on the force acting on the fluid, and noise may be generated in the motor-operated valve.
In view of the above problems, an object of the present invention is to provide an electrically operated valve and a refrigeration cycle including the electrically operated valve, in which generation of abnormal noise due to fluid colliding with a valve body can be suppressed.
Means for solving the problems
In order to achieve the above object, the motor-operated valve of the present invention includes: a valve body section including a valve element housing section having a first port connected to a first passage and a second port connected to a second passage substantially orthogonal to the first passage, the valve element housing section housing a valve element unit including a valve element for opening and closing a valve port provided in a valve seat of the second port so as to be movable, the valve element housing section communicating with the first port and the second port; an electromagnetic actuator including a stator coil unit that operates a drive mechanism that performs an operation of controlling opening and closing of a valve port of a valve seat so as to adjust a flow rate of a fluid that passes between a tip portion of a valve element unit and a peripheral edge of the valve port of the valve seat; and a protection wall provided between a portion of the valve body housing portion facing the first port and the valve body, the protection wall preventing a fluid immediately after flowing into the valve body housing portion from the first port from colliding with the valve body.
The guard wall may be formed integrally with the valve seat, or may be formed integrally with a sleeve in the valve body housing portion, the sleeve guiding the valve body. The guard wall may be formed integrally with a guide support portion that guides the valve body housing coupled to the valve body in the valve body housing portion. The guard wall may have a substantially semi-cylindrical cross-sectional shape that covers substantially half of the outer peripheral portion of the valve body.
The refrigeration cycle system of the present invention is characterized by comprising an evaporator, a compressor, and a condenser, and the motor-operated valve is provided in a pipe disposed between an outlet of the condenser and an inlet of the evaporator.
Effects of the invention
According to the electric valve of the present invention and the refrigeration cycle including the electric valve, the guard wall is provided between the portion of the valve body housing portion facing the first port and the valve body, and the fluid immediately after flowing into the valve body housing portion from the first port is prevented from colliding with the valve body, so that the generation of abnormal noise due to the fluid colliding with the valve body can be suppressed.
Drawings
Fig. 1 is a sectional view showing the structure of a first embodiment of an electrically operated valve according to the present invention.
Fig. 2 is a view from the direction indicated by the arrow IIA in fig. 1.
Fig. 3 is a partial sectional view showing an enlarged main portion of fig. 1.
Fig. 4 is a partial sectional view taken along line IV-IV in fig. 3.
Fig. 5 is a partial sectional view of a main portion showing another example of the protective wall used in the first embodiment of the electrically operated valve of the present invention.
Fig. 6 is a partial sectional view showing still another example of the protective wall used in the first embodiment of the electrically operated valve of the present invention.
Fig. 7 is a partial cross-sectional view showing a modification of the protective wall shown in fig. 1.
Fig. 8 is a partial cross-sectional view showing a modification of the protective wall shown in fig. 1.
Fig. 9 is a partial cross-sectional view showing a modification of the protective wall shown in fig. 1.
Fig. 10 is a partial cross-sectional view showing a modification of the protective wall shown in fig. 1.
Fig. 11 is a table showing noise reduction values (dB) corresponding to respective sound pressure levels in respective electrically operated valves provided with various types of protective walls when the noise reduction value (dB) of the electrically operated valve not provided with a protective wall is set to zero.
Fig. 12 is a partial sectional view showing the structure of a second embodiment of the motor-operated valve of the present invention.
Fig. 13 is a partial sectional view showing the structure of a third embodiment of the motor-operated valve of the present invention.
Fig. 14 is a diagram schematically showing the configuration of an example of the refrigeration cycle system to which the first to third embodiments of the motor-operated valve of the present invention are applied.
In the figure:
12. 13-guide support portions, 13WA, 31WA, 36WAL, 38 'WA, 36WB, 36WC, 36WD, 36 WE-guard walls, 14-male screw shafts, 18, 19-spool housings, 23, 26-spools, 31, 36-valve main bodies, 31A, 36A-spool housing portions, 31V, 31' V, 36V-valve seats, 32-connecting pipes, 32P-first ports, 38-sleeves.
Detailed Description
Fig. 1 shows a structure of a motor-operated valve according to a first embodiment of the present invention and a pipe for piping.
For example, as shown in fig. 14, the motor-operated valve 3 according to the first embodiment is disposed in the pipe of the refrigeration cycle between the outlet of the outdoor heat exchanger 6 and the inlet of the indoor heat exchanger 2 during a cooling operation, which will be described later. The motor-operated valve 3 is joined to the primary pipe Du1 by a later-described connecting pipe 32 and is joined to the secondary pipe Du2 by a connecting pipe 34 during the cooling operation. The primary pipe Du1 connects the outlet of the outdoor heat exchanger 6 to the motor-operated valve 3, and the secondary pipe Du2 connects the inlet of the indoor heat exchanger 2 to the motor-operated valve 3. Between the outlet of the indoor heat exchanger 2 and the inlet of the outdoor heat exchanger 6, a pipe Du3 joined to the outlet of the indoor heat exchanger 2, a flow path switching valve 8, and a pipe Du6 joined to the inlet of the outdoor heat exchanger 6 are disposed. The compressor 4 is connected to the flow path switching valve 8 via a pipe Du4 and a pipe Du 5. The other end of the pipe Du3 is connected to the port 8b of the flow path switching valve 8. The other end of the pipe Du6 is connected to the port 8d of the flow path switching valve 8. One end of the pipe Du4 is connected to the port 8c of the flow path switching valve 8, and the other end of the pipe Du4 is connected to the suction port of the compressor 4. One end of the pipe Du5 is connected to the port 8a of the flow path switching valve 8, and the other end of the pipe Du5 is connected to the discharge port of the compressor 4. During cooling operation, the port 8a communicates with the port 8d, and the port 8b communicates with the port 8 c. Thus, during the cooling operation, the refrigerant in the refrigeration cycle circulates in the direction indicated by the arrow R shown in fig. 14, for example, the outdoor heat exchanger 6 functions as a condenser, and the indoor heat exchanger 2 functions as an evaporator. Further, the description has been given of the mode in which the electrically operated valve 3 is joined to the primary-side pipe Du1 by the connection pipe 32 and is joined to the secondary-side pipe Du2 by the connection pipe 34 during the cooling operation, but the electrically operated valve is not limited to this example, and for example, the electrically operated valve 3 may be joined to the primary-side pipe Du1 by the connection pipe 34 and may be joined to the secondary-side pipe Du2 by the connection pipe 32 during the cooling operation.
On the other hand, during the heating operation, the flow path switching valve 8 is switched so that the port 8a of the flow path switching valve 8 communicates with the port 8b and the port 8c communicates with the port 8 d. Thus, during the heating operation, the refrigerant in the refrigeration cycle circulates in the direction indicated by the arrow F shown in fig. 14, for example, and the indoor heat exchanger 2 functions as a condenser and the outdoor heat exchanger 6 functions as an evaporator. The control unit, not shown, controls the driving of the compressor 4 and the motor-operated valve 3, and controls the switching of the flow path switching valve 8.
As shown in fig. 1, the electrically operated valve includes: a valve driving unit that is disposed in the cylindrical rotor case 20 and drives a valve element unit described later; a valve body coupling portion 30 coupled to an end portion of the rotor case 20; a valve body 36 coupled to a lower end of the valve body coupling portion 30 and including a valve seat 36V having a valve port 36Va opened and closed by a distal end portion of the valve element 26; and a valve element unit that is disposed in the valve body 36 and includes a valve element 26 that opens and closes a valve port 36Va of the valve seat 36V.
The valve driving unit includes, as main components: a male screw shaft 14 for lifting and lowering a valve element unit described later; a guide support portion 12 having a female screw portion 12B formed with a female screw 12FMS fitted to the male screw shaft 14, and fixed to the valve body coupling portion 30 to guide the valve body unit so as to be able to perform an up-and-down operation; a rotor 10 which is fixed to a guide shaft portion 14A of the male screw shaft 14, rotatably supported, and magnetized; and a stator coil 40 disposed on an outer peripheral portion of the rotor case 20 and configured to rotate the rotor 10.
The guide support portion 12 has a guide surface on an inner peripheral portion thereof, and the guide surface guides a cylindrical valve body case 18 constituting a part of the valve body unit so as to be movable up and down.
The externally threaded shaft 14 includes: an external thread portion 14B that fits into the internal thread 12FMS of the internal thread portion 12B; a connection portion 14C formed at the lower end of the male screw portion 14B and engaged with the periphery of the through hole 18a of the valve body case 18 via a gasket 16; and a guide shaft portion 14A formed at an upper end of the male screw portion 14B. The guide shaft portion 14A is rotatably supported in a cylindrical portion 20C that protrudes from the top portion in the rotor case 20 toward the guide support portion 12 along the center axis.
A spiral guide portion 11 is formed on the outer peripheral portion of the cylindrical portion 20C, and the spiral guide portion 11 guides the movable stopper piece 11B to move in the central axis direction of the cylindrical portion 20C while rotating. One end of the movable stopper piece 11B is locked to the protrusion of the rotor 10. Further, rotation stoppers 20US and 20LS of the movable stopper piece 11B are provided at the uppermost end portion and the lowermost end portion of the cylindrical portion 20C, respectively. Thus, when the movable stopper piece 11B abuts against the rotation stoppers 20US and 20LS, the movable stopper piece 11B is stopped at a predetermined rotation angle corresponding to a predetermined valve closing position and a predetermined valve opening (full open) position of the valve body 26, which will be described later.
The valve driving unit is controlled based on a drive pulse signal supplied to the stator coil 40 by a drive control unit, not shown.
The valve body unit includes, as main components: a needle-like valve element 26 that opens and closes a valve port 36Va of a valve seat 36V described later; a cylindrical resin spring receiver member 24 that engages the projecting portion 14F of the coupling portion 14C of the male screw shaft 14 with the inner peripheral edge of the opening end portion 18T of the valve body case 18 in cooperation with the resin washer 16 and the collar 17; a coil spring 22 disposed between the extension portion 24T of the spring holder member 24 and the annular flat portion for spring holder of the one end 26EA of the valve body 26, and biasing the two in directions away from each other; and a cylindrical valve body case 18 that houses the spring holder member 24, the coil spring 22, and one end 26EA of the valve body 26.
An annular stopper portion 18E for receiving an extension of the one end 26EA of the valve body 26 is provided at one end of the cylindrical valve body case 18 close to the valve body portion 36. Thus, the one end 26EA of the spool 26 is supported by the stopper portion 18E with a predetermined clearance, and therefore the degree of freedom of the spool 26 with respect to the spool case 18 is increased. The valve body coupling portion 30 has a lower portion that houses the guide support portion 12 and a small space portion 30A of the cylindrical valve element housing 18.
The outer peripheral portion of the cylindrical valve body case 18 is supported to be capable of moving up and down while being in sliding contact with the guide surface of the guide support portion 12. Thus, when the tip (needle-like portion) of the other end 26EB of the valve element 26 is inserted into the valve port 36Va of the valve seat 36V, and the outer peripheral surface of the needle-like portion of the valve element 26 abuts against the opening peripheral edge of the valve port 36Va, and thereafter, the male screw shaft 14 is continuously lowered, the coil spring 22 is compressed by a predetermined amount. Thereby, the outer peripheral surface of the needle-like portion of the valve element 26 is pressed against the opening peripheral edge of the valve port 36Va by the spring force of the coil spring 22. Thereby, the valve port 36Va of the valve seat 36V is closed.
The valve body 36 is made of a metal material, such as brass, stainless steel, aluminum alloy, or a resin material, and has a valve body housing 36A on the inside, and the valve body housing 36A houses a sleeve 38 that guides the valve body 26 to be movable up and down, and the other end 26EB of the valve body 26. The upper end of the valve body 36 is fixed to the hole periphery of the lower end of the valve body connecting portion 30 by caulking and brazing. The sleeve 38 is fixed to the upper end of the valve body 36 by press fitting and caulking.
In the valve body housing portion 36A, the other end 26EB of the valve body 26 protrudes toward the valve port 36 Va. As shown in fig. 2 and 3, the valve body housing portion 36A includes: a first port 32P to which one end of a connection pipe 32 as a first passage is connected on an axis substantially orthogonal to the central axis of the valve body 26; and a valve seat 36V having a valve port 36Va communicating with a second port 34P, the second port 34P having one end of a connecting pipe 34 as a second passage connected to an axis common to the center axis of the valve body 26. As shown in fig. 3 and 4 in an enlarged manner, a substantially semi-cylindrical guard wall 36WA is integrally formed between the valve element 26 and the first port 32P in the valve body portion 36 at a portion of the valve seat 36V facing the first port 32P, and this guard wall 36WA prevents the refrigerant immediately after flowing into the valve element housing portion 36A through the first port 32P from colliding with the valve element 26. The substantially semi-cylindrical guard wall 36WA is formed concentrically around the valve port 36Va (valve element 26) with a predetermined gap in the radial direction. Further, a substantially semi-cylindrical shield wall 36WA extends upward from the valve seat 36V toward the lower end of the sleeve 38. The upper end of the protection wall 36WA abuts against the lower end of the sleeve 38. The diameter of the outer peripheral portion of the protective wall 36WA is set smaller than the diameter of the first port 32P.
In this configuration, the stator coil 40 of the valve driving unit is controlled by a drive pulse signal from the drive control unit, and the valve element 26 is moved up and down, whereby a refrigerant as a fluid supplied through the connection pipe 32 or the connection pipe 34 passes through a gap flow path formed between the inner peripheral surface of the valve port 36Va forming the valve seat 36V and the needle-like portion of the other end 26EB of the valve element 26 in the direction indicated by the arrow F or the arrow R at a predetermined flow rate. At this time, as shown in fig. 4, the refrigerant (fluid) FL immediately after flowing into the valve body housing portion 36A from the first port 32P of the connecting pipe 32 collides with the protection wall 36WA, and is divided into two flows without directly colliding with the valve body 26, and flows around between the outer peripheral portion of the valve body 26 and the inner peripheral surface of the valve body housing portion 36A, and passes through a predetermined flow rate via the clearance flow path. Therefore, the vibration of the other end 26EB of the valve element 26 can be suppressed.
Specifically, when the guard wall 36WA is not provided, since the fluid easily flows from the first port 32P into the valve body housing portion 36A, the flow velocity at a position near the opening of the first port 32P around the valve port 36Va (valve body 26) becomes particularly high. As a result, in a state where the pressure (flow velocity) around the other end 26EB of the valve element 26 is not uniform, the fluid passes through a gap flow path formed between the inner peripheral surface of the valve port 36Va forming the valve seat 36V and the needle-like portion of the other end 26EB of the valve element 26, and noise is likely to be generated.
However, in the case where the guard wall 36WA is provided, since the flow velocity is reduced by the collision of the fluid with the guard wall 36WA, and thereafter the fluid flows around the clearance flow path formed between the outer peripheral portion of the valve element 26 and the inner peripheral surface of the valve element housing portion 36A, and between the inner peripheral surface of the valve port 36Va forming the valve seat 36V and the needle-like portion of the other end 26EB of the valve element 26, the pressure difference (flow velocity difference) around the other end 26EB of the valve element 26 at the time of inflow is gradually reduced, and therefore, the generation of noise in the electric valve can also be suppressed.
In the above example, the upper end of the shield wall 36WA abuts against the lower end of the sleeve 38, but the present invention is not limited to this, and for example, as shown in fig. 5, the shield wall 36WAL may be formed so that a predetermined gap is formed between the upper end of the shield wall 36WAL and the lower end of the sleeve 38. However, the position H2 at the upper end of the guard wall 36WAL needs to be higher than the maximum rising position H1 of the needle portion at the other end 26EB of the valve element 26.
Further, in the above example, the guard wall 36WA and the guard wall 36WAL are provided on the valve seat 36V, but the present invention is not limited to this example, and for example, as shown in fig. 6, the guard wall 38 'WA may be formed integrally with the sleeve 38'. In fig. 6, the electric valve includes: a valve driving unit disposed in the cylindrical rotor case 20 shown in fig. 1 and driving a valve element unit described later; a valve body coupling portion 30 coupled to an end portion of the rotor case 20; and a valve element unit including a valve element 26 disposed in the valve body 36 'and including a valve port 36' Va for opening and closing the valve seat 36 'V, but the same components are used except for the valve body 36', and therefore, redundant description thereof is omitted.
The valve body 36 ' is made of a metal material such as brass, stainless steel, aluminum alloy, or a resin material, and includes a sleeve 38 ' that houses the valve element 26 so as to be able to move up and down, and a valve element housing 36 ' a that houses the other end 26EB of the valve element 26. The upper end of the valve body 36' is fixed to the hole periphery of the lower end of the valve body connecting portion 30 by caulking or brazing. The sleeve 38 'is fixed to the upper end of the valve body 36' by press fitting and caulking. In the valve body housing portion 36 'a, the other end 26EB of the valve body 26 protrudes toward the valve port 36' Va. Further, the valve body housing portion 36' a includes: a first port 32P to which one end of a connection pipe 32 as a first passage is connected on an axis substantially orthogonal to the central axis of the valve body 26; and a valve seat 36 'V having a valve port 36' Va communicating with a second port 34P, the second port 34P having one end of a connecting pipe 34 as a second passage connected to an axis common to the center axis of the valve body 26. A substantially semi-cylindrical shield wall 38 ' WA is formed integrally with the lower end portion of the sleeve 38 ' at a portion of the valve seat 36 ' V facing the first port 32P, and this shield wall 38 ' WA prevents the refrigerant immediately after flowing into the valve element housing portion 36 ' a through the first port 32P from colliding with the valve element 26. The substantially semi-cylindrical guard wall 38 'WA is formed concentrically around the valve port 36' Va with a predetermined gap therebetween, for example. Further, the lower end of the guard wall 36' WA abuts against the surface of the valve seat 36V.
In this configuration, the refrigerant (fluid) immediately after flowing into the valve element housing portion 36 ' a from the first port 32P of the connecting pipe 32 collides with the protection wall 38 ' WA, and thus, does not directly collide with the valve element 26, but is divided into two flows, and flows around between the outer peripheral portion of the valve element 26 and the inner peripheral surface of the valve element housing portion 36 ' a, and passes through a clearance flow path at a predetermined flow rate. Therefore, the vibration of the other end 26EB of the valve element 26 can be suppressed, and the pressure difference (flow velocity difference) around the other end 26EB of the valve element 26 is gradually reduced, so that the generation of noise in the motor-operated valve can be suppressed.
In the example shown in fig. 1, as a modification of the substantially semi-cylindrical shield wall 36WA used, a shield wall 36WB as shown in fig. 7 may be used. In fig. 7, the center angle of the protection wall 36WB formed on the valve seat 36V is, for example, an angle smaller than 180 °, and the width W of the protection wall 36WB in the radial direction crossing the center axis of the valve port 36Va may be equal to or larger than the diameter of the spool 26.
As shown in fig. 8, a pair of the protection wall 36WC and the protection wall 36WB having the same shape as the protection wall 36WB may be provided so that the center axis of the valve port 36Va is a symmetry axis and faces each other.
The sectional shape of the shield wall is not limited to the shape of a part of a substantially semi-cylindrical shape, and for example, as shown in fig. 9 and 10, the sectional shape of the shield wall 36WD may be a rectangular shape, or the sectional shape of the shield wall 36WE may be a shape similar to a crescent moon.
Fig. 11 shows results of comparing the obtained noise reduction values (dB) for various examples of the protective wall used in the motor-operated valve, for example, the example (EM1) shown in fig. 1, the example (EM2) shown in fig. 6, the example (EM3) shown in fig. 8, the example (EM4) shown in fig. 7, the example (EM5) shown in fig. 9, and the example (EM6) shown in fig. 10. The noise reduction value (dB) is a result verified by the inventors of the present application. This verification is performed using an electrically operated valve not provided with a protective wall as described above and each electrically operated valve provided with various protective walls.
The noise reduction value (dB) in fig. 11 is a value obtained by converting the sound pressure levels measured in the valve opening degrees (clearance flow paths) of the flow rates that are 10% of the maximum flow rate in the state where the pressure difference between the connection pipes 32 and 34 is 1 MPa. The noise reduction value (dB) is, for example, a value corresponding to each sound pressure level in each electrically operated valve provided with various types of protective walls when the noise reduction value (dB) of the electrically operated valve not provided with a protective wall is set to zero.
Therefore, as is clear from the table in fig. 11, the noise reduction effect was confirmed in any of the examples, and it was confirmed that the noise reduction effect was particularly higher in the example (EM1) shown in fig. 1, the example (EM2) shown in fig. 6, and the example (EM3) shown in fig. 7 than in the other examples.
Fig. 12 shows a piping tube and a configuration of a second embodiment of the motor-operated valve according to the present invention. The motor-operated valve as the second embodiment is arranged between the outlet of the outdoor heat exchanger 6 and the inlet of the indoor heat exchanger 2 in the cooling operation described later in the piping of the refrigeration cycle, as shown in fig. 14, for example, in the same manner as in the above-described example.
The electric valve includes: a valve driving unit that is disposed in the cylindrical rotor case 20 and drives a valve element unit described later; a valve body 31 connected to an end of the rotor case 20 and having a valve seat 31V opened and closed by a distal end of the valve element 23; and a valve element unit which is disposed in the valve body 31 and includes a valve element 23 that opens and closes the valve seat 31V.
In the example shown in fig. 12 and fig. 13 described later, the same components as those in the example shown in fig. 1 are denoted by the same reference numerals, and redundant description thereof will be omitted. In the example shown in fig. 12 and fig. 13 described later, although not shown, the stator coil 40, the cylindrical portion 20C, the spiral guide portion 11, and the rotation stoppers 20US and 20LS of the movable stopper piece 11B in the example shown in fig. 1 are similarly provided.
The valve driving unit includes, as main components: a male screw shaft 14 for lifting the valve body unit; a guide support portion 12 having a female screw portion 12B formed with a female screw 12FMS fitted to the male screw shaft 14, and fixed to the valve body portion 31 to guide the valve element unit to be capable of lifting and lowering; a rotor 10 which is fixed to a guide shaft portion 14A of the male screw shaft 14, rotatably supported, and magnetized; and a stator coil (not shown) disposed on an outer peripheral portion of the rotor case 20 and configured to rotate the rotor 10.
The externally threaded shaft 14 includes: an external thread portion 14B that fits into the internal thread 12FMS of the internal thread portion 12B; a connection portion 14C formed at the lower end of the male screw portion 14B and engaged with the periphery of the through hole 19a of the valve body case 19 via a gasket 16; and a guide shaft portion 14A formed at an upper end of the male screw portion 14B. The guide shaft portion 14A is rotatably supported in a cylindrical portion 20C that protrudes from the top portion in the rotor case 20 toward the guide support portion 12 along the center axis.
The valve driving unit is controlled based on a drive pulse signal supplied to the stator coil by a drive control unit, not shown.
The valve body unit is configured to include, as main components: a needle-like valve element 23 that opens and closes a valve port 31Va of a valve seat 31V described later; a cylindrical resin spring receiver member 24 that engages the inner peripheral edge of the opening end portion 19T of the valve body case 19 in cooperation with the resin washer 16 and the extension portion 14F of the coupling portion 14C of the male screw shaft 14; a coil spring 22 disposed between the extension portion 24T of the spring holder member 24 and the annular flat portion for spring holder of the one end 23EA of the valve body 23, and biasing the both in directions away from each other; and a cylindrical valve body case 19 that houses the spring holder member 24, the coil spring 22, and the one end 23EA of the valve body 23.
One end of the cylindrical valve body case 19 close to the valve seat 31V is closed by fastening the outer peripheral portion of the one end 23EA of the valve body 23. The other side of the cylindrical valve body case 19 is an opening end portion 19T, and the opening end portion 19T has a hole 19a through which a reduced diameter portion of the coupling portion 14C of the male screw shaft 14, which positions the washer 16, passes. Therefore, the gasket 16 is disposed between the inner peripheral edge of the opening end portion 19T of the valve body case 19 and one end surface of the protruding portion 14F.
The outer peripheral portion of the cylindrical valve body case 19 is supported to be capable of moving up and down while being in sliding contact with the guide surface of the guide support portion 12. Thus, the coil spring 22 is compressed by a predetermined amount when the male screw shaft 14 is further lowered after the distal end (needle-like portion) of the other end 23EB of the valve element 23 is inserted into the valve port 31Va of the valve seat 31V and the outer peripheral surface of the needle-like portion of the valve element 23 abuts against the opening peripheral edge of the valve port 31 Va. Thereby, the outer peripheral surface of the needle-like portion of the valve body 23 is pressed to the opening peripheral edge of the valve port 31Va by the spring force of the coil spring 22. Thereby, the valve port 31Va of the valve seat 31V is closed.
The valve body 31 is made of a metal material, such as brass, stainless steel, aluminum alloy, or a resin material, and has a valve body housing portion 31A on the inside, and the valve body housing portion 31A houses the lower end of the guide support portion 12 below the female screw portion 12B, the other end 23EB of the valve body 23, and the cylindrical valve body housing 19. In the valve body housing portion 31A, the other end 23EB of the valve body 23 protrudes toward the valve port 31 Va. Further, the valve body housing portion 31A includes: a first port 32P to which one end of a connection pipe 32 as a first passage is connected on an axis substantially orthogonal to the central axis of the valve body 23; and a valve seat 31V adjacent to a second port 34P, the second port 34P having one end of a connecting pipe 34 as a second passage connected to an axis common to the central axis of the valve body 23. In the valve seat 31V, a semi-cylindrical guard wall 31WA is formed integrally with the valve seat 31V between the outer peripheral surface of the valve body housing 19 and the first port 32P facing the first port 32P. The upper end of the protective wall 31WA abuts against the lower end surface portion of the guide support 12.
In this configuration, the refrigerant (fluid) immediately after flowing into the valve body housing portion 31A from the first port 32P of the connecting pipe 32 collides with the protection wall 31WA, and thus, the refrigerant is divided into two flows, without directly colliding with the valve body housing 19 and the valve body 23, and flows between the outer peripheral portion of the valve body 23 and the inner peripheral surface of the valve body housing portion 31A, and passes through a predetermined flow rate via the clearance flow path. Therefore, the vibration of the other end 23EB of the valve element 23 can be suppressed, and the pressure difference (flow velocity difference) around the other end 23EB of the valve element 23 is gradually reduced, so that the generation of noise in the motor-operated valve can be suppressed.
Fig. 13 shows a structure of a motor-operated valve according to a third embodiment of the present invention and a pipe for piping. The motor-operated valve as the third embodiment is arranged between the outlet of the outdoor heat exchanger 6 and the inlet of the indoor heat exchanger 2 in the cooling operation described later in the piping of the refrigeration cycle, as shown in fig. 14, for example, in the same manner as in the above-described embodiment.
The electric valve includes: a valve driving unit that is disposed in the cylindrical rotor case 20 and drives a valve element unit described later; a valve body 31 connected to an end of the rotor case 20 and having a valve seat 31' V opened and closed by a tip end of the valve body 23; and a valve element unit which is disposed in the valve body 31 and includes a valve element 23 for opening and closing the valve seat 31' V. In the example shown in fig. 13, the same components as those in the examples shown in fig. 1 and 12 are denoted by the same reference numerals, and redundant description thereof is omitted.
The valve driving unit includes, as main components: a male screw shaft 14 for lifting the valve body unit; a guide support portion 13 having a female screw portion 13B formed with a female screw 13FMS fitted to the male screw shaft 14, and fixed to the valve body portion 31 to guide the valve element unit to be capable of lifting and lowering; a rotor 10 which is fixed to a guide shaft portion 14A of the male screw shaft 14, rotatably supported, and magnetized; and a stator coil (not shown) disposed on an outer peripheral portion of the rotor case 20 and configured to rotate the rotor 10.
The guide support portion 13 has a guide surface on an inner peripheral portion thereof, and guides the cylindrical valve body case 19 of the valve body unit to perform a lifting operation while rotating. In addition, the guide support 13 has a guard wall 13WA connected to the guide surface at a lower portion. A semi-cylindrical guard wall 13WA is formed integrally with the lower portion of the guide support 13 between the outer peripheral surface of the spool housing 19 and the first port 32P so as to face the first port 32P. The lower end of the protection wall 13WA extends toward the valve seat 31 ' V to be lower than the upper surface of the valve seat 31 ' V, but the protection wall may be brought into contact with the peripheral edge of the valve seat 31 ' V or with the inner bottom surface of the valve main body 31.
In this configuration, the refrigerant (fluid) immediately after flowing into the valve body housing portion 31A from the first port 32P of the connecting pipe 32 also collides with the protection wall 13WA, and thus, the refrigerant is divided into two flows, without directly colliding with the valve body housing 19 and the valve body 23, and flows between the outer peripheral portion of the valve body 23 and the inner peripheral surface of the valve body housing portion 31A, and passes through a predetermined flow rate via the clearance flow path. Therefore, the vibration of the other end 23EB of the valve element 23 can be suppressed, and the pressure difference (flow velocity difference) around the other end 23EB of the valve element 23 is gradually reduced, so that the generation of noise in the motor-operated valve can be suppressed.
Claims (5)
1. An electrically operated valve, comprising:
a valve body section including a valve element housing section that has a first port connected to a first passage and a second port connected to a second passage substantially orthogonal to the first passage, and communicates with the first port and the second port, the valve element housing section housing a valve element unit that includes a valve element that controls opening and closing of a valve port provided in a valve seat of the second port so as to be movable;
an electromagnetic actuator including a stator coil unit that operates a drive mechanism that performs an operation of controlling opening and closing of a valve port of the valve seat so as to adjust a flow rate of a fluid that passes between a tip portion of the valve element unit and a peripheral edge of the valve port of the valve seat; and
a protection wall provided between a portion of the valve body housing portion facing the first port and the valve body to prevent a fluid immediately after flowing into the valve body housing portion from the first port from colliding with the valve body,
the above-mentioned electric valve is characterized in that,
a width of the guard wall in a radial direction of the first port is set to be equal to or larger than a diameter of the valve body and smaller than the diameter of the first port in a cross section orthogonal to a central axis of the valve port, a central angle formed by both ends of the guard wall in the radial direction and the central axis of the valve port is smaller than 180 degrees,
alternatively, the guard wall has a substantially semi-cylindrical cross-sectional shape that covers substantially half of the outer peripheral portion of the valve body, and the outer diameter of the substantially semi-cylindrical shape is smaller than the diameter of the first port.
2. Electrically operated valve according to claim 1,
the guard wall is formed integrally with the valve seat.
3. Electrically operated valve according to claim 1,
the guard wall is formed integrally with a sleeve that guides the valve body in the valve body housing portion.
4. Electrically operated valve according to claim 1,
the guard wall is formed integrally with a guide support portion that guides a valve body case coupled to the valve body in the valve body housing portion.
5. A refrigeration cycle system is characterized in that,
comprises an evaporator, a compressor and a condenser,
the electrically operated valve according to any one of claims 1 to 4 is provided in a pipe disposed between an outlet of the condenser and an inlet of the evaporator.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-021718 | 2019-02-08 | ||
| JP2019021718A JP7080194B2 (en) | 2019-02-08 | 2019-02-08 | Solenoid valve and refrigeration cycle system equipped with it |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111550565A CN111550565A (en) | 2020-08-18 |
| CN111550565B true CN111550565B (en) | 2022-04-26 |
Family
ID=71999962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010034322.3A Active CN111550565B (en) | 2019-02-08 | 2020-01-13 | Electrically operated valve and refrigeration cycle system provided with same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7080194B2 (en) |
| CN (1) | CN111550565B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963614A (en) * | 2019-11-27 | 2021-06-15 | 浙江盾安禾田金属有限公司 | Noise reduction sleeve and electronic expansion valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1388332A (en) * | 2001-05-24 | 2003-01-01 | 株式会社不二工机 | Electric valve |
| JP2006071186A (en) * | 2004-09-02 | 2006-03-16 | Saginomiya Seisakusho Inc | Valve device and refrigeration cycle device |
| CN101311588A (en) * | 2007-05-25 | 2008-11-26 | 株式会社鹭宫制作所 | Needle valve and refrigerating cycle device with the needle valve |
| CN205534555U (en) * | 2016-01-26 | 2016-08-31 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN106461092A (en) * | 2014-07-02 | 2017-02-22 | 三菱电机株式会社 | Expansion valve and refrigeration cycle device |
| CN107355546A (en) * | 2016-05-10 | 2017-11-17 | 浙江盾安人工环境股份有限公司 | Electric expansion valve |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3380395B2 (en) * | 1996-05-22 | 2003-02-24 | 松下精工株式会社 | Expansion valve |
| JP2001289538A (en) | 2000-04-03 | 2001-10-19 | Fuji Koki Corp | Motor driven valve |
| JP2006077955A (en) | 2004-09-13 | 2006-03-23 | Saginomiya Seisakusho Inc | Valve device and refrigerating cycle device |
| CN103133701B (en) | 2011-11-22 | 2016-08-03 | 浙江三花股份有限公司 | A kind of electrodynamic valve |
| WO2014023014A1 (en) | 2012-08-10 | 2014-02-13 | 浙江三花股份有限公司 | Electronic expanding valve |
| JP6392685B2 (en) | 2015-03-06 | 2018-09-19 | 株式会社鷺宮製作所 | Motorized valve |
-
2019
- 2019-02-08 JP JP2019021718A patent/JP7080194B2/en active Active
-
2020
- 2020-01-13 CN CN202010034322.3A patent/CN111550565B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1388332A (en) * | 2001-05-24 | 2003-01-01 | 株式会社不二工机 | Electric valve |
| JP2006071186A (en) * | 2004-09-02 | 2006-03-16 | Saginomiya Seisakusho Inc | Valve device and refrigeration cycle device |
| CN101311588A (en) * | 2007-05-25 | 2008-11-26 | 株式会社鹭宫制作所 | Needle valve and refrigerating cycle device with the needle valve |
| CN106461092A (en) * | 2014-07-02 | 2017-02-22 | 三菱电机株式会社 | Expansion valve and refrigeration cycle device |
| CN205534555U (en) * | 2016-01-26 | 2016-08-31 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN107355546A (en) * | 2016-05-10 | 2017-11-17 | 浙江盾安人工环境股份有限公司 | Electric expansion valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7080194B2 (en) | 2022-06-03 |
| CN111550565A (en) | 2020-08-18 |
| JP2020128782A (en) | 2020-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5480753B2 (en) | Motorized valve | |
| JP5395775B2 (en) | Motorized valve | |
| CN110425331B (en) | Electric valve | |
| JP5696093B2 (en) | Motorized valve | |
| JP6740179B2 (en) | Motorized valve and refrigeration cycle system | |
| CN109296805B (en) | Electric valve and refrigeration cycle system | |
| CN106352139B (en) | Motor-driven valve and refrigerating circulation system | |
| JP5726426B2 (en) | Three-way electric valve and heat pump device equipped with the valve | |
| CN108474493B (en) | Motor-driven valve | |
| CN109114284B (en) | Electric valve and refrigeration cycle system | |
| KR102646329B1 (en) | Electronic expansion valve | |
| CN111550565B (en) | Electrically operated valve and refrigeration cycle system provided with same | |
| CN112344089B (en) | Electrically operated valve and refrigeration cycle system provided with same | |
| CN111379892B (en) | Valve device and refrigeration cycle system | |
| CN112576763B (en) | Electric valve and refrigeration cycle system | |
| CN110836270A (en) | Electronic expansion valve | |
| CN110836562A (en) | Electronic expansion valve and air conditioning system using same | |
| CN113280122B (en) | Electric valve and refrigeration cycle system | |
| JP7341280B2 (en) | Electric valve and refrigeration cycle system | |
| CN217519254U (en) | Double-orifice expansion valve and refrigerating system comprising same | |
| CN110836269B (en) | Electronic expansion valve and air conditioning system using same | |
| JP2017044347A (en) | Motor valve | |
| JP4351561B2 (en) | Refrigeration cycle apparatus and electric control valve | |
| JP2021179240A (en) | Motor-operated valve and refrigeration cycle system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |