WO2004072521A1 - 電動式切換弁 - Google Patents
電動式切換弁 Download PDFInfo
- Publication number
- WO2004072521A1 WO2004072521A1 PCT/JP2004/001527 JP2004001527W WO2004072521A1 WO 2004072521 A1 WO2004072521 A1 WO 2004072521A1 JP 2004001527 W JP2004001527 W JP 2004001527W WO 2004072521 A1 WO2004072521 A1 WO 2004072521A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- valve body
- port
- rotor
- center
- 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.)
- Ceased
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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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/072—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted closure members
- F16K11/074—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted closure members with flat sealing faces
- F16K11/0743—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted closure members with flat sealing faces with both the supply and the discharge passages being on one side of the closure plates
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86493—Multi-way valve unit
- Y10T137/86863—Rotary valve unit
Definitions
- the present invention relates to a motor-operated switching valve, and more particularly to a direct-acting motor-operated switching valve used for switching a refrigerant flow path of a refrigerator / refrigerator.
- JP-A-11-13925, JP-A-2001-156493, and JP-A No. 11-139925 as motor-operated switching valves used for switching refrigerant channels of refrigerators and refrigerators.
- Japanese Patent Application Laid-Open No. 2000-214 Japanese Patent Application Laid-Open No. 2000-122, a plurality of valve ports are provided on a flat bottom surface in a valve chamber.
- the valve has a valve body that is open and is rotatably provided in the valve chamber, slides on the bottom surface of the valve chamber at the end face, and switches the connection of the valve port according to the rotation position.
- the pitch circle radius of the valve port is small and the radius of the valve body is correspondingly small in order to reduce the driving torque of the valve body.
- the pitch circle radius of the valve boat due to the arrangement of the fittings connected to the valve port.
- the arrangement position of the valve port is shifted toward the rotation center of the valve body with respect to the center of the pipe joint, and the pitch radius of the valve port is reduced in accordance with the amount of the shift.
- the conventional valve has a structure in which a valve port is formed on one side of the valve chamber bottom and a pipe joint is connected on the other side, so there is a limit to the amount of deviation that can be set, and the amount of deviation is high. It cannot be set to an appropriate value or required value with a certain degree. Disclosure of the invention
- the present invention relates to a case where the arrangement position of a valve port is deviated in the rotational radius direction of a valve body with respect to the center of a pipe joint in order to reduce the pitch circle radius of the valve port.
- the purpose of the present invention is to solve the above-mentioned problems that may occur, and to set the amount of radial deviation of a valve port with respect to a fitting to an appropriate value or a required value with a high degree of design freedom.
- Another object of the present invention is to provide a motor-operated switching valve that has a high flatness of a valve seat surface and does not cause valve leakage.
- a motor-operated switching valve has a flat bottom surface in a valve chamber, a plurality of valve ports opened, and an end face provided rotatably in the valve chamber.
- a valve body that slides on the bottom surface of the valve chamber to switch the connection of the valve port in accordance with a rotation position, and that is electrically driven to rotate the valve body by an electric actuator.
- FIG. 1 is a sectional view showing a first embodiment of an electric switching valve according to the present invention.
- FIGS. 2 (a) to 2 (d) are views showing the respective switching positions of the electrically operated switching valve of the first embodiment.
- FIG. 3 is an exploded perspective view of a main part of the electric switching valve of the first embodiment.
- FIG. 4 is an enlarged plan view showing an arrangement relationship between a through hole and a valve port of the electric switching valve of the first embodiment.
- FIG. 5 is an enlarged sectional view showing an arrangement relationship between a through hole and a valve port of the electric switching valve of the first embodiment.
- FIG. 6 is an enlarged plan view of a base-pointing stop portion of the electric switching valve of the first embodiment.
- FIG. 7 (a) is an enlarged sectional view of the valve body of the electric switching valve of the first embodiment
- FIG. 7 (b) is an enlarged sectional view showing the swing operation of the valve body.
- FIG. 8 is an exploded perspective view of a main part of an electric switching valve according to a modification of the first embodiment.
- FIG. 9 is an enlarged perspective view showing a state in which the leaf spring structure shown in FIG. 8 is fitted to a valve body.
- FIG. 10 shows a state in which the valve body and the rotor of the stepping motor are connected in a torque transmitting relationship.
- FIG. 10 is an enlarged front view as viewed in the direction of arrow A in FIG.
- FIG. 11 is a sectional view showing a second embodiment of the electrically operated switching valve according to the present invention.
- FIGS. 12 (a) to 12 (c) are views showing the respective switching positions of the electric switching valve of the second embodiment.
- FIG. 13 is an exploded perspective view of a main part of the electric switching valve of the second embodiment.
- FIG. 14 is an enlarged plan view showing an arrangement relationship between a through hole and a valve port of the electric switching valve of the second embodiment.
- FIG. 15 is a refrigerant circuit diagram showing an example of use of the electric switching valve according to the present invention.
- FIG. 16 is a refrigerant circuit diagram showing another example of use of the electric switching valve according to the present invention.
- the motor-operated switching valve 10 includes a disc-shaped bottom cover member 11 as a fixed-side member, and a can-shaped case 1 hermetically welded onto the bottom cover member 11. 2 and.
- the case 12 cooperates with the bottom lid member 11 to form a valve chamber 13 having an airtight chamber structure inside.
- Case 12 is a stainless steel sheet formed by a deep drawing press. As shown in FIG. 3, the rotor accommodating cylindrical portion 12 A and the upper dome portion 12 B of the case 12 are formed by a bearing engaging recess 12 formed in the center of the upper dome portion 12 B. In order to ensure the concentricity between C and the rotor accommodating cylindrical portion 12A, they are integrally press-molded.
- the curvature (R) force of the spherical surface is the outer diameter (D) of the rotor housing cylinder portion 12A.
- the upper dome portion 12B is formed.
- the purpose of this is to increase the internal pressure resistance of the case so that the vertical dimension of the case is not increased unnecessarily, and furthermore, the bending of the upper dome part 12 mm is moderated to secure the required pressure resistance. It is designed to be.
- the lower opening 12D of the case 12 to be joined to the bottom lid member 1 1 is designed to provide a margin for design of internal components and consideration of pressure resistance, and to reduce the thermal influence during joining.
- the diameter is larger than the outer diameter (D) of the part 12 mm.
- the bottom lid member 11 is formed by stamping and punching a stainless steel plate.
- a step 11A having an outer diameter substantially equal to the inner diameter of the lower opening 12D of the case 12 is formed on the upper surface of the bottom lid member 11, and the lower opening 12D of the case 12 is formed in the step 11A.
- Through holes 11 B, 11 C, and 11 D are formed in required portions (three places) of the bottom lid member 11.
- the through-holes 11C and 11D are located at a predetermined rotation angle (90 degrees) apart on the same arc line concentric with the center axis.
- One ends of fittings 14, 15 and 16 are inserted into the through holes 11B, 11C and 11D, respectively.
- the pipe joints 14, 15, and 16 are fixed to the bottom cover member 11 and the intermediate plate 17 which are integrated by joining, which will be described later, by brazing with ring brazing, respectively, and the outside of the bottom cover member 11 (Downward).
- This brazing is preferably performed by brazing in a furnace without flux using a hydrogen reducing atmosphere furnace or the like as brazing in the same process as the brazing of the intermediate plate 17 described later, from the viewpoint of environmental considerations.
- the brazing filler metal of the pipe joints 14, 15, 16 and the intermediate plate 17 flows to the welding surface with the bottom cover member 11 and the case 12.
- an annular U groove 11H having a diameter slightly smaller than the step portion 11A is formed.
- An intermediate plate (base plate) 17 is fixed to the upper surface of the bottom lid member 11 by brazing.
- the intermediate plate 17 is obtained by stamping and bending a stainless steel plate.
- a shaft support hole 17F is punched and formed.
- the intermediate plate 17 is formed with a positioning hole 17B which is fitted into the positioning projection 11F embossed on the bottom cover member 11 by punching.
- the central recess 11E of the bottom lid member 11 has a sufficient depth to act as a brazing material accumulation part (see Fig. 5), preventing the brazing material from flowing into the shaft support hole 17F. I do.
- the central concave portion 11E also functions as an escape portion for a variation in the axial length of the central shaft 21 described later.
- the intermediate plate 17 has a cutout 17C that opens the through hole (inlet port) 11: 6 to the valve chamber 13.
- the intermediate plate 17 has oblong communication openings (communication openings) 17D and 17E communicating with the through holes (exit ports) 11C and 11D, respectively.
- the communication openings 17D and 17E are long in the radial direction, respectively, and communicate with the through holes 11C and 1ID on the radially outer side.
- the through hole 11B may be referred to as an A port, the through hole 11C as a B port, and the through hole 11D as a C port.
- a shaft support hole 17F formed by punching in the center of the intermediate plate 17 is fitted with a lower end 21A of a later-described center shaft 21 (see FIG. 5).
- the diameter of the shaft support hole 17F is smaller than that of the annular convex portion 17A, and is a diameter that ensures a required clearance with respect to the shaft diameter of the central shaft 21.
- the intermediate plate 17 is formed by bending a stopper piece 17G for setting a base point with which a protruding piece 20F of the valve body 20 described later contacts.
- a coil spring 18 for buffering is attached to the stopper piece 17G so as to surround the stopper piece 17G.
- the buffer coil spring 18 is made of a stainless steel wire having spring properties, and is wound in a normal coil shape in a state close to the close contact state.
- the upper end of the stopper piece 17G is caulked and deformed to prevent the buffer coil spring 18 from dropping off.
- a convex portion 11 G is formed on the upper surface of the bottom lid member 11, and the tip of the convex portion 11 G is attached to the stopper coil spring 17 G attached to the stopper piece 17 G. It abuts on the lower end of 8 to prevent the coil spring 18 from tilting.
- valve seat (valve seat member) 19 is attached to the upper surface of the intermediate plate 17.
- the valve seat 19 is formed by etching both sides of a stainless steel sheet into a predetermined shape.
- the valve seat 19 removes the edge wedge by double-sided etching, improves the smoothness and surface roughness of the slide valve seat flat surface (valve seat surface 19G), and improves the sliding lubricity of the valve body 20. In order to obtain, carefully selected barrel processing is performed.
- the valve seat 19 has positioning holes 19 A and 19 B that fit into the two positioning projections 17 H and 17 J embossed on the intermediate plate 17, and a communication opening 17.
- Valve ports 19C and 19D communicating with each of D and 17E and a central hole 19E through which the central shaft 21 penetrates are formed by etching. By forming these by etching, the degree of freedom of design, the irregular shape design, the dimensional accuracy of parts, and the flatness and surface roughness can be reliably and inexpensively achieved, and valve leakage is reduced.
- the position and angle of the valve seat 19 are determined by fitting the positioning holes 19A and 19B into the positioning projections 17H and 17J of the intermediate plate 17, respectively.
- Bonding of the valve seat sheet 19 to the intermediate plate 17 includes methods such as bonding and sealing agents, brazing, soldering, heat pressing and welding.
- Epoxy, polyamide-imide, polyester, polyesterimide-polyurethane-based polyurethanes are suitable as adhesives and sealants in terms of cold soot resistance. Bonding and curing of the sealant can be done in patches or in a continuous furnace. In the case of an adhesive and sealant made of a thermosetting resin such as an epoxy resin, heat curing is performed at about 120 ° C.
- the valve seat 19 has a notch 19 F that opens the through hole (inlet port) 11 B to the valve chamber 13, similarly to the notch 17 C of the intermediate plate 17. .
- valve ports 19C and 19D are provided with a predetermined rotation angle (in the same arc line as the center axis of the center hole 19E through which the center shaft 21 passes). 90 degree ) It is far away.
- the pitch circle radius PV of the valve ports 19C and 19D is smaller than the pitch circle radius Pp of the through holes 11C and 11D.
- the valve ports 19C and 19D each have an intermediate plate 1
- the 7 communication openings 17D and 17E communicate with the radially inner side.
- the pitch circle radii P p of the through holes 11 C and 11 D are the same as the pitch circle radii P of the pipe joints 15 and 16 shown in FIG.
- the bottom of the valve chamber 13 has a bottom cover member 1 1 to which the fittings 14, 15, and 16 are connected as shown in FIG. 5.
- valve ports 19C and 19D are offset from the center of the pipe joints 15 and 16 toward the rotation center of the valve body 20.
- An intermediate plate 17 having radially long communication openings 17D and 17E connects the valve ports 19C and 19D to the pipe joints 15 and 16.
- the upper surface of the valve seat 19 in the valve chamber 13 is a valve seat surface 19G, and the valve body 20 is disposed on the valve seat surface 19G.
- the valve body 20 is an integrally molded product made of a resin material in consideration of sliding and refrigerant resistance. As shown in FIG. 7, two valve ports 19 C and 19 are provided on the lower bottom surface.
- An arc-shaped flat valve portion 2OA that opens and closes D at a predetermined rotation angle position, and two foot-shaped portions 20B and 20C for stabilizing a seal load by parallelism are formed to project from each other.
- the flat valve portion 2OA is formed at a position matching the pitch circle radius PV of the valve ports 19C and 19D, and the two foot portions 20B and 20C are formed at the lower bottom surface of the valve body 20.
- the center hole 20 D at the center of the center axis 20D on the same arc line concentric with the center axis line as shown in Fig. 2 in the circumferential direction It is protruding from above.
- the valve body 20 has a flat valve portion 2OA and foot portions 20B and 20C on the valve seat surface 19G of the valve seat 19. Make sliding contact.
- the upper surface of the valve body 20 whose lower bottom surface is a flat valve portion 2OA avoids the influence of shrinkage in resin molding, and the flatness and roughness of the flat valve portion 2OA.
- the thickness is set to 20E, which is a thin concave shape to avoid a drop.
- the center of rotation of the valve body 20 is set by a center axis 21 penetrating the center hole 20D, and the valve body 20 is guided by the center axis 21 and rotates around the center axis.
- the center hole 20D has a fitting straight hole portion (small clearance) for securing concentricity with the center shaft 21. 20 D a and an upper tapered hole portion 20 D b.
- the upper tapered hole portion 2 OD b functions not only as a structure for improving the assemblability of the center shaft 21, but also as a oscillating mechanism, so that the valve seat 19 and the valve body 20 with respect to the center shaft 21 are formed. Variations in parallel and squareness can be absorbed, and the seal as a switching valve ⁇ Operational stability is improved. In addition, this swinging reduces the risk of occurrence of the lip of the valve body 20 due to dust.
- valve element 20 has a protruding piece 31A provided on the rotor 31 of the stepping motor 30 between the two protruding pieces 20F and 20G, as shown in FIG.
- the rotor 31 is connected to the rotor 31 in a torque transmitting relationship in a rotationally positioned state, whereby the valve body 20 and the rotor 31 rotate synchronously.
- the protruding piece 20F also serves as a stopper piece on the rotor side, and is rotated by the rotation of the rotor 31 in the base direction (CW) as shown in FIG. 2 (a) and FIG. It comes into contact with the coil spring 18 of the buffering piece 17 G of the stopper piece 17 G for taking out, and the abutment is performed by this contact.
- the buffer coil spring 18 is made of metal, it is not affected by the refrigerant and the refrigerating machine oil, and is more durable than a buffer material (rubber stopper) made of a rubber-like elastic material such as an O-ring.
- Guide pieces 20H and 20J are formed on the upper portions of the projecting pieces 20F and 20G of the valve body 20, and these guide pieces 20H and 20J At the time of assembling 31 into the valve body 20, it guides that the projecting piece 31 A is engaged between the projecting pieces 20 F and 20 G. In other words, the projecting piece 31A is prevented from coming off between the projecting pieces 20F and 20G. Further, as shown in FIG. 3, the valve body 20 is provided with a retainer spring 23 described later. The upper guide shaft 2 has OK.
- the center shaft 21 is made of polished stainless steel, and its lower end 21 A is rotatably supported by the intermediate plate 17 by fitting with the shaft support hole 17 F (see FIG. 5). .
- the upper end 21B of the central shaft 21 is rotatably fitted in the bearing hole 22A of the bearing member 22.
- the bearing member 22 is made of a highly slippery resin material, and is engaged with the bearing engaging recess 12C of the case 12 by an upper central projection 22B (see FIG. 1).
- a valve 31 of a stepping motor 30 is rotatably provided in the valve chamber 13.
- the rotor 31 is a plastic magnet in which the outer periphery 31B is multipolar magnetized. As described above, the rotor 31 is connected to the valve body 20 in a torque transmitting relationship with the protruding piece 31A, and the valve body 20 Is driven to rotate.
- the boss portion 31C of the rotor 31 is formed with a through hole 31D through which the center shaft 21 penetrates, and the outer peripheral portion 31B and the boss portion 31C are formed.
- the pressure-equalizing communication hole 31F is provided in the rib-shaped part 31E connecting the two.
- the axial length of the through hole 31D is made as long as possible in order to prevent the rotor 31 from rotating unsteady (rattle, tilt). It is sufficient that at least one equalizing communication hole 31F is provided, and in addition to balancing the pressure between the upper and lower portions of the rotor 31, it functions to prevent refrigerating machine oil and liquid refrigerant from being deposited on the upper portion.
- a holding spring 23 made of a compression coil spring is sandwiched between the lower end of the boss portion 31C of the rotor 31 and the upper surface of the valve body 20, a holding spring 23 made of a compression coil spring is sandwiched.
- the presser spring 23 presses the flat valve portion 2OA of the valve body 20 against the valve seat surface 19G to ensure the stability of the valve seal in a low differential pressure state.
- the pressing spring 23 simultaneously urges the rotor 31 and the bearing member 22 upward, and presses the upper central projection 22B of the bearing member 22 against the bearing engaging concave portion 12C of the case 12. .
- a stator assembly 32 of the stepping motor 30 is positioned and fixed to the outer periphery of the case 12.
- the stator 3D 32 has upper and lower two-stage stator coils 33, a plurality of magnetic pole teeth 34, an electrical connector 35, and the like, and is liquid-tightly sealed with a sealing resin 36.
- the stator assembly 32 includes a positioning projection 11 1 J having a forked end 37 A of a positioning piece 37 provided on the stator assembly 32 formed on an outer peripheral portion of the bottom cover 11. 1
- the phase is matched (the mounting position in the circumferential direction) by engaging so as to sandwich IK.
- the stator assembly 32 is prevented from coming off by the non-return engagement of the check pawl 38 A of the stopper piece 38 provided on the stator assembly 32 with the lower bottom surface of the bottom cover 11. Is done.
- valve body 20 is separated from the valve ports 19C and 19D by the split rotation drive by the stepping motor 30 as shown in FIG.
- Valve port 19C and 19D are both open to valve chamber 13 and port A (inlet port) is connected to two outlet ports (port B and port C).
- the second switching position (18 pulses), which is open to chamber 13 and the A port (inlet port) communicates only with the B port, and a flat valve as shown in Fig.
- the flat valve section 20A blocks the valve port 19C, only the valve port 19D is opened to the valve chamber 13 and the A port (inlet port) is opened.
- the fittings 15 and 16 are dimensionally limited to be shifted toward the center, and the arrangement radius is the pitch circle radius Pp of the through holes 11C and 11D.
- the valve ports 19C and 19D are offset from the center positions of the through holes 11C and 11D toward the rotation center of the valve body 20, respectively.
- 9C, 19D pitch circle radius PV is smaller than through hole 11C, 11D pitch circle radius Pp, so that valve port 19C, 19D pitch circle radius PV is through hole 1.
- the position of the flat valve portion 2OA can be set radially inward, and the driving torque required to rotate the valve body 20 accordingly. Is reduced.
- the amount of deviation of the valve ports 19C and 19D toward the center of rotation is the communication opening 1 of the intermediate plate 17. It is possible to set appropriate values and required values with high design flexibility without being restricted by 7D and 17E.
- the projecting piece 31A of the rotor 31 of the stepping motor 30 is engaged between the two projecting pieces 20F and 20G of the valve element 20.
- the backlash between the two protruding pieces 20F, 20G and the protruding piece 31A should be eliminated by a spring piece. It may be.
- the ring-shaped portion 24 A of the leaf spring structure 24 disposed between the valve body 20 and the pressing spring 23 is formed by the taper of the valve body 20. It is fitted to the guide shaft portion 20 K until it hits the step portion 20 L at the base end thereof, and extends in the radial direction from the ring portion 24 A as shown in FIG.
- the extension portion 24B is positioned between the two guide pieces 20H and 20J of the valve body 20, and a spring piece 24C bent at the tip of the extension portion 24B is Arrange along the inner side surface of the projecting piece 20 G.
- FIGS. 11 to 14 parts corresponding to FIGS. 1 to 7 are denoted by the same reference numerals as those in FIGS. 1 to 7, and description thereof is omitted. .
- valve ports 19 C and 19 D formed by etching on the valve seat 19 are respectively provided with the valve body 20. It has a fan shape around the center of rotation. As best shown in FIG. G
- the pitch radius Pv of 19C and 19D is smaller than the pitch radius Pp of the through holes 11C and 1ID, and the outer peripheral edges of the valve ports 19C and 19D are through holes 11C and It is offset radially inward by the radial dimension Ra from the outer periphery of 11D.
- the flat valve portion 2OA of the valve body 20 has a fan shape in accordance with the shape and arrangement of the valve ports 19C and 19D.
- the valve port 19C or 19D is closed depending on the condition.
- the pitch circle radii PV of the valve ports 19 C and 19 D have the through holes 11 C and 11 1
- the driving torque required for the rotation of the valve body 20 is reduced as compared with the case where the pitch circle radius P is equal to D.
- the amount of deviation of the valve ports 19C and 19D toward the rotation center is not restricted by the fan-shaped communication openings 17D and 17E of the intermediate plate 17 and has a high degree of design freedom. It can be set to an appropriate value or a required value.
- the shape of the valve ports 19C and 19D may be an arc concentric with the rotation center of the valve body 20, and any shape can cope with a large flow rate.
- valve body 20 closes the valve port 19D by the split rotation drive by the stepping motor 30, as shown in FIG. 12 (a).
- the first switching position (0 pulse base position) where only valve port 19C is open to valve chamber 13 and port A (inlet boat) communicates only with port B, and Fig. 12 (b ),
- the flat valve 2OA closes the valve port 19C, only the valve port 19D opens to the valve chamber 13, and the A port (inlet port) communicates only with the C port.
- Fig. 12 (b ) The flat valve 2OA closes the valve port 19C, only the valve port 19D opens to the valve chamber 13, and the A port (inlet port) communicates only with the C port.
- the second switching position (20 pulses) to move the flat valve section 20A away from either of the valve ports 19C and 19D, G
- the third switching position where both 19C and 19D are opened to the valve chamber 13 and the A port (inlet port) communicates with the two outlet ports (B port and C port). And switching operation between the 40 pulse), 3 position is obtained.
- the two projecting pieces 20F and 20G of the valve body 20 and the projection of the rotor 31 of the stepping motor 30 are provided.
- the backlash between the piece 3 1 A and the valve body 20 and the holding spring 23 In this case, a detailed description using the drawings will be omitted, but the extension of the leaf spring structure 24 may be omitted.
- the leaf spring structure until the portion 24B contacts the upper surface of the valve body 20 shown in FIG. 13 so that the portion 24B is located between the two guide pieces 20H and 20J of the valve body 20.
- the spring piece 24 C is arranged along the inner side surface of the protruding piece 20 G by fitting the ring-shaped part 24 A of 24 into the tapered guide shaft part 2 OK of the valve element 20.
- FIG. 15 shows a refrigerant circuit of a refrigerator according to a first use example of the electrically operated switching valve according to the first and second embodiments of the present invention.
- the refrigerant circuit of the refrigerator comprises a compressor 51 and It has a condenser 52, an expansion valve (or a capillary tube) 53, and an evaporator 54.
- the motor-operated switching valve 10 has the inlet port A connected to the discharge side of the compressor 51, the outlet port B connected to the condenser 52, and the outlet port C connected to the bypass passage 55 during normal operation.
- the motor-operated switching valve 10 is located at a switching position that connects the inlet port A to the outlet port B.
- the refrigerant flows through the compressor 51 ⁇ the condenser 52 ⁇ the expansion valve 53 ⁇ the evaporator 54 ⁇ the compressor 51, and a normal refrigeration cycle is established.
- the motor-operated switching valve 10 connects the inlet port A to the outlet port. It is located at the switching position communicating with.
- the refrigerant flows through the compressor 51 ⁇ bypass circuit 55 ⁇ evaporator 54 ⁇ compressor 51, high-temperature and high-pressure refrigerant flows through the evaporator 54, and defrosts the evaporator 54 Is performed.
- FIG. 16 shows a refrigerant circuit of a refrigerator / refrigerator according to a second use example of the electrically operated switching valve according to the first and second embodiments of the present invention.
- the refrigerant circuit of the refrigerator / refrigerator includes a compressor. 61, condenser (radiator) 62, freezer compartment tube (C.T.F) 63, and refrigerator compartment tube (C.T.R) 64 It has an evaporator 65 for the freezer compartment, an evaporator 66 for the refrigerator compartment, and an electrically operated switching valve (electrically operated three-way switching valve) 67.
- the motor-operated switching valve 10 has an inlet port A connected to the downstream side of the condenser 62, an outlet port B connected to the freezer compartment tube 63, and an outlet port C connected to the refrigerator compartment. Connected to retube 64.
- the electrically operated switching valve 10 is located at the first switching position where the inlet port A communicates with both the outlet port B and the outlet port C.
- the refrigerant flows through the compressor 6 1 ⁇ condenser 6 2 ⁇ freezer compartment tube 6 3 ⁇ cold room evaporator 6 5 ⁇ compressor 6 1 and compressor 6 1 ⁇ Condenser 6 2 ⁇ chiller compartment tube 6 4 ⁇ refrigerator compartment evaporator 6 6 ⁇ freezer compartment evaporator 6 5 ⁇ compressor 6 1
- the cooling effect in full operation is ensured for the evaporation load of the refrigerator evaporator 6.
- the electrically operated switching valve 10 is located at the second switching position that connects the inlet port A to the outlet port B.
- the refrigerant flows through the compressor 6 1 ⁇ condenser 6 2 ⁇ freezer compartment tube 6 3 ⁇ freezer evaporator 6 5 ⁇ compressor 61 to operate the freezer and stop the refrigerator. It becomes.
- the motor-operated switching valve 10 When the operation is stopped, the motor-operated switching valve 10 is located at the third switching position in which the inlet port A is not connected to any outlet port and is in a fully closed state. In this case, when the operation is stopped, high-temperature and high-pressure refrigerant is prevented from flowing into the freezer evaporator 65 and the refrigerator compartment evaporator 66, and the operation stop time is extended.
- the electrically operated switching valve 10 is located at the fourth switching position that connects the inlet port A to the outlet port C.
- the refrigerant flows from the compressor 6 1 ⁇ condenser 6 2 ⁇ refrigerator tube 6 4 ⁇ refrigerator evaporator 6 6 ⁇ freezer
- the evaporator flows from the evaporator 65 to the compressor 61, and the refrigerator compartment priority cooling operation is performed.
- the valve port formed in the valve seat is formed through the through hole formed in the bottom lid.
- the amount of deviation of the valve port in the direction of rotational radius is not restricted by the communication opening of the intermediate plate. Can be set to a value.
- the pitch circle radius of the valve port arrangement is smaller than the pitch circle radius of the joint member arrangement. The driving torque required for the rotation of the motor can be reduced.
- the shape of the valve port that is deviated from the center position of the joint member in the rotational radius direction of the valve body may be, for example, an arc shape such as a sector shape, and the shape of the valve port is an arc shape. This can increase the flow rate.
- the valve port is composed of one inlet port that is always in communication with the valve chamber, and two outlet ports that are open at positions separated from each other in the rotation direction of the valve body. The connection between the inlet port and the two outlet ports is switched in accordance with the rotational position of the valve body, and the two outlet ports are each deviated from the center position of the joint member in the radial direction of rotation of the valve body. be able to.
- the electric actuator is a stepping motor
- a rotor of the stepping motor is engaged with the valve body in a torque transmitting relationship
- the valve body has an intermediate plate formed in a center hole formed in the valve body.
- the center of rotation is set by the more supported center shaft being rotatably engaged, and the center hole of the valve element has a tapered hole shape.
- the electric actuator is a stepping motor
- a protrusion is formed on the bottom surface of the valve chamber as a stop in the rotation direction of the rotor of the stepping motor
- a coil spring for buffering is attached to the protrusion.
- the shock at the time of the stopper collision is buffered by the buffer coil spring, and the collision noise is reduced.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Multiple-Way Valves (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020057014999A KR100984090B1 (ko) | 2003-02-14 | 2004-02-13 | 전동식 전환 밸브 |
| EP20040711039 EP1593889B1 (en) | 2003-02-14 | 2004-02-13 | Electrically operated switch-over valve |
| DE200460032517 DE602004032517D1 (de) | 2003-02-14 | 2004-02-13 | Elektrisch betätigtes umschaltventil |
| US10/545,712 US7204271B2 (en) | 2003-02-14 | 2004-02-14 | Electrically operated switch-over valve |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003-37315 | 2003-02-14 | ||
| JP2003037315A JP4256692B2 (ja) | 2003-02-14 | 2003-02-14 | 電動式切換弁 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004072521A1 true WO2004072521A1 (ja) | 2004-08-26 |
Family
ID=32866356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/001527 Ceased WO2004072521A1 (ja) | 2003-02-14 | 2004-02-13 | 電動式切換弁 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7204271B2 (ja) |
| EP (1) | EP1593889B1 (ja) |
| JP (1) | JP4256692B2 (ja) |
| KR (1) | KR100984090B1 (ja) |
| CN (1) | CN100360844C (ja) |
| DE (1) | DE602004032517D1 (ja) |
| WO (1) | WO2004072521A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352768A (zh) * | 2020-09-28 | 2022-04-15 | 青岛海尔电冰箱有限公司 | 电动切换阀、制冷系统及冰箱 |
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| KR100598321B1 (ko) * | 2004-03-12 | 2006-07-10 | 주식회사 모아텍 | 전동식 냉매 조절 밸브 |
| KR20070095381A (ko) | 2005-01-31 | 2007-09-28 | 스미토모 겐키 세조 가부시키가이샤 | 리프팅 마그넷 사양의 작업기계 |
| US7793913B2 (en) * | 2006-08-01 | 2010-09-14 | Nidec Sankyo Corporation | Valve element opening/closing device |
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| DE102007028565A1 (de) * | 2007-06-19 | 2008-12-24 | Danfoss A/S | Kühlanlage |
| CN101762123B (zh) * | 2008-11-12 | 2012-12-19 | 浙江三花股份有限公司 | 一种电动流量分配器 |
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| JP5130339B2 (ja) * | 2010-10-05 | 2013-01-30 | 株式会社鷺宮製作所 | 電動弁 |
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| CN105626951B (zh) * | 2014-11-07 | 2019-09-17 | 浙江盾安禾田金属有限公司 | 一种切换阀 |
| CN113124224B (zh) * | 2019-12-30 | 2025-12-12 | 浙江三花智能控制股份有限公司 | 电动阀 |
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| US11300218B2 (en) * | 2020-01-21 | 2022-04-12 | Purity (Xiamen) Sanitary Ware Co., Ltd. | Three-way flow dividing valve structure |
| CN113944795A (zh) * | 2020-07-15 | 2022-01-18 | 浙江三花智能控制股份有限公司 | 电动阀 |
| CN113944794A (zh) * | 2020-07-15 | 2022-01-18 | 浙江三花智能控制股份有限公司 | 电动阀 |
| JP7674726B2 (ja) * | 2021-02-26 | 2025-05-12 | 株式会社東海理機 | ロータリバルブ |
| JP7517238B2 (ja) * | 2021-04-21 | 2024-07-17 | 株式会社デンソー | バルブ装置 |
| WO2025205357A1 (ja) * | 2024-03-26 | 2025-10-02 | 株式会社デンソー | バルブ装置 |
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- 2004-02-13 DE DE200460032517 patent/DE602004032517D1/de not_active Expired - Lifetime
- 2004-02-13 WO PCT/JP2004/001527 patent/WO2004072521A1/ja not_active Ceased
- 2004-02-13 CN CNB2004800041307A patent/CN100360844C/zh not_active Expired - Lifetime
- 2004-02-13 EP EP20040711039 patent/EP1593889B1/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352768A (zh) * | 2020-09-28 | 2022-04-15 | 青岛海尔电冰箱有限公司 | 电动切换阀、制冷系统及冰箱 |
| CN114352768B (zh) * | 2020-09-28 | 2024-01-05 | 青岛海尔电冰箱有限公司 | 制冷系统及冰箱 |
Also Published As
| Publication number | Publication date |
|---|---|
| US7204271B2 (en) | 2007-04-17 |
| EP1593889A4 (en) | 2007-12-19 |
| EP1593889A1 (en) | 2005-11-09 |
| JP2004263726A (ja) | 2004-09-24 |
| US20060070671A1 (en) | 2006-04-06 |
| EP1593889B1 (en) | 2011-05-04 |
| DE602004032517D1 (de) | 2011-06-16 |
| JP4256692B2 (ja) | 2009-04-22 |
| CN100360844C (zh) | 2008-01-09 |
| KR100984090B1 (ko) | 2010-09-30 |
| CN1751197A (zh) | 2006-03-22 |
| KR20050101341A (ko) | 2005-10-21 |
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