JP2008245381A - Power generator for faucet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power generator for a faucet wherein such dust as iron powder is less prone to stick to the inner face of a pipe wall to which a yoke is opposed from the outside. <P>SOLUTION: The power generator for a faucet includes: an impeller provided in a feed water passage so that it is rotatable around a central axis substantially parallel with the feed water passage and having a blade portion protruded in the radial direction; an impeller ring provided so that it encircles the blade portion and is rotatable integrally with the impeller; a cylindrical magnet alternately magnetized in N pole and in S pole and rotatable integrally with the impeller; a coil provided outside the feed water passage; and yokes having inner circumferential portions opposed to the portion of the coil on the inner circumferential side, outer circumferential portions opposed to the portion of the oil on the outer circumferential side, and a plurality of inductors provided so that they are away from each other in the circumferential direction and opposed to the magnetized surface of the magnet. The ends of the inner circumferential portions of the yokes in the axial direction on the side where the inductors are provided are partly cut out. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a faucet generator that generates electricity using the flow of running water supplied to a faucet.

  Conventionally, there has been known an automatic faucet device that senses a hand inserted under a faucet with a sensor and automatically discharges water from the faucet. There is also known a device that includes a small generator in the flow path of such an automatic water faucet device, stores electric power obtained by this generator, and supplements electric power of a circuit such as the above-described sensor.

  For example, Patent Documents 1 and 2 disclose so-called axial flow generators in which a rotating shaft of a rotating body that is rotated by receiving the force of a water flow is substantially parallel to a direction in which the water flow flows. In Patent Document 1, a water wheel having a blade portion is provided in a flow path through which a fluid flows, and a substantially cylindrical magnet is fixed to the outer peripheral side of the blade portion of the water wheel. In Patent Document 2, a magnet having a watermill shape is rotatably provided inside a water supply pipe.

In such an axial flow generator, a yoke for guiding the magnetic flux of the coil and magnet to the coil is disposed outside the tube wall (flow path). In such a configuration, if there is a place where the water flow is stagnant and stagnant in the flow path facing the yoke through the tube wall, if the iron powder or the like is contained in the water flow, the iron powder etc. Is easily attracted to the yoke and is likely to adhere to the inner surface of the tube wall. If this deposit accumulates in the flow path, the rotation of the water turbine is hindered, and there is a possibility that the energy conversion efficiency from the water flow energy to the rotation energy of the rotating body, that is, the power generation efficiency is lowered.
JP 2004-336882 A No. 3-531

  The present invention provides a faucet generator in which dust such as iron powder hardly adheres to the inner surface of a tube wall facing the yoke from the outside.

  According to one aspect of the present invention, a moving blade having a moving blade blade portion provided in the water supply flow channel so as to be rotatable around a central axis substantially parallel to the water supply flow channel and projecting in a radial direction; A blade ring provided around the periphery of the blade portion and rotatable integrally with the blade, and a cylindrical shape in which N and S poles are alternately magnetized along the circumferential direction, A magnet that can rotate integrally with the rotor blade, a coil provided outside the water supply flow path, an inner peripheral portion that faces the inner peripheral side portion of the coil, and an outer peripheral portion that faces the outer peripheral side portion of the coil And a yoke having a plurality of inductors that are spaced apart from each other in the circumferential direction and face the magnetized surface of the magnet, and an axial direction of the inner circumferential portion of the yoke on the side where the inductor is provided For faucets, characterized by being partially cut off at the end Electric machine is provided.

  According to another aspect of the present invention, a moving blade having a blade blade portion provided in the water supply passage so as to be rotatable about a central axis substantially parallel to the water supply passage and projecting in a radial direction. A wing and a magnet in which N poles and S poles are alternately magnetized along the circumferential direction, and are provided so as to surround the blade portion of the blade, and can rotate integrally with the blade. A coil provided outside the water supply channel, an inner peripheral portion facing the inner peripheral side portion of the coil, an outer peripheral portion facing the outer peripheral portion of the coil, and spaced apart from each other in the circumferential direction. A yoke having a plurality of inductors facing the magnetized surface of the magnet, and an axial end portion of the yoke on the side where the inductor is provided is partially cut off. A faucet generator is provided.

  According to the present invention, there is provided a faucet generator in which dust such as iron powder is difficult to adhere to the inner surface of a tube wall facing the yoke from the outside.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same component in each drawing.

FIG. 1 is a schematic cross-sectional view of a faucet generator 1 according to an embodiment of the present invention.
The faucet generator 1 mainly includes a cylindrical body 20, a stationary blade 21, a moving blade 25, a moving blade ring 28, a magnet M1, a stator 50, and the like, which are included in a case 12 (see FIG. 6). Is housed in. An arrow drawn above the stationary blade 21 indicates the direction of running water.

Here, before explaining the faucet generator 1, the faucet device 3 provided with the faucet generator 1 will be explained.
FIG. 5 is a schematic diagram illustrating an example of attachment of the faucet device 3.
FIG. 6 is a schematic cross-sectional view of the faucet device 3.

  The faucet device 3 is attached to the washstand 2 etc., for example. The faucet device 3 is connected to an inflow channel 5 for tap water or the like via a pipe 4. The faucet device 3 includes a cylindrical main body 3a and a water discharge portion 3b provided on an upper portion of the main body 3a and extending in a radially outward direction of the main body 3a. A water discharge port 6 is formed at the tip of the water discharge unit 3 b, and a sensor 7 is built in the vicinity of the water discharge port 6.

  In the faucet device 3, a water supply passage 10 is formed that guides the water supplied from the inflow passage 5 and flowing through the pipe 4 to the water outlet 6. A solenoid valve 8 for opening and closing the water supply flow path 10 is built in the main body 3a, and a constant flow valve 55 for limiting the amount of water discharge is built on the downstream side of the solenoid valve 8. ing. Further, a pressure reducing valve or a pressure regulating valve (not shown) for reducing the pressure when the original pressure of water supply or the like is too higher than the working pressure is built in upstream of the electromagnetic valve 8. It should be noted that the constant flow valve 55, the pressure reducing valve, and the pressure regulating valve may be appropriately provided as necessary.

  A faucet generator 1 is provided inside the water discharger 3 b downstream of the constant flow valve 55. Inside the main body 3a, a charger 56 for charging the electric power generated by the faucet generator 1 and a controller 57 for controlling the driving of the sensor 7 and the opening and closing of the electromagnetic valve 8 are provided. Since the faucet generator 1 is disposed on the downstream side of the solenoid valve 8 and the constant flow valve 55, the water supply source pressure (primary pressure) does not directly act on the faucet generator 1. Absent. Therefore, the faucet generator 1 is not required to have such a high pressure resistance, and such an arrangement is advantageous in terms of reliability and cost.

  The coil 36 (see FIG. 1) provided in the faucet generator 1 and the control unit 57 are connected via a wiring (not shown), and the output of the coil 36 is sent to the charger 56 via the control unit 57. It is like that.

  The faucet generator 1 is not limited to being provided inside the faucet fitting (the main body 3a and the water discharger 3b) of the faucet device 3. For example, you may provide in the piping (flow path) 4 which connects between the faucet | fitting metal fitting of the faucet device 3, and the water stop cock (former plug) 105 (refer FIG. 5) provided upstream from this. .

  The faucet generator 1 is provided in a flow path between a water faucet (main plug) 105 and a water outlet 6 of the water faucet device 3 and is directed from the water faucet 105 to the water outlet 6 of the water faucet device 3. Electricity is generated by the flowing hydropower. Examples of the faucet device include kitchen faucets, living / dining faucets, shower faucets, toilet faucets, toilet faucets, and the like. In the faucet device, the discharge flow rate is set to, for example, 100 liters per minute or less, desirably 30 liters per minute or less. In particular, it is desirable that the toilet faucet is set to 5 liters per minute or less. Further, when the discharge flow rate is relatively large, such as a toilet faucet, the flow of water flowing from the water supply pipe to the generator 1 can be branched to adjust the flow rate of flow through the generator 1 to 30 liters per minute or less. desirable. This is because there is a concern that if all the water flow from the water supply pipe flows to the generator 11, the rotational speed of the rotor blade 25 increases, noise and shaft wear may increase, and even if the rotational speed increases. This is because if the rotational speed is not less than the appropriate number of revolutions, energy loss due to eddy currents and coil heat occurs, so the amount of power generation does not increase. In addition, the water supply pressure of the water pipe to which the faucet fitting is attached may be a low water pressure of about 0.05 (MPa) in Japan, for example.

  In addition, the faucet device is not limited to an automatic faucet using a human body detection sensor, but a one-touch faucet by turning on / off a manual switch, a fixed water discharge faucet that stops water by counting the flow rate, and stops when a set time has elapsed. It may be a timer faucet for watering.

  In addition, the electric power generated by the faucet generator 1 is used for, for example, light-up, generation of electrolytic functional water such as alkaline ion water and silver ion-containing water, flow rate display (metering), temperature display, voice guide, etc. May be.

  Next, returning to FIG. 1, the faucet generator 1 will be described.

  The cylindrical body 20 has a stepped shape including a small diameter portion 20b, a large diameter portion 20a, and a flange portion 20c, and is disposed in the water discharge portion 3b shown in FIGS. Established. The cylindrical body 20 is disposed so that the central axis direction thereof is substantially parallel to the direction in which flowing water flows through the water supply passage 10 in the water discharger 3b. The cylindrical body 20 is disposed with the small diameter portion 20b facing the downstream side and the large diameter portion 20a facing the upstream side.

  Inside the cylindrical body 20, a stationary blade 21, a moving blade 25, and a bearing 34 are provided in this order from the upstream side. The bearing 34 is provided inside the small diameter portion 20b, and the stationary blade 21 and the moving blade 25 are provided inside the large diameter portion 20a.

  The opening at the upstream end of the large diameter portion 20 a is liquid-tightly closed by the sealing member 32 through the O-ring 33. An annular step portion is provided on the inner peripheral portion of the sealing member 32, and a ring member 24 provided on the outer peripheral side of the stationary blade 21 of the stationary blade 21 is supported on the step portion. A cylindrical pressing member 31 is inserted inside the sealing member 32, and the ring member 24 of the stationary blade 21 is sandwiched between the pressing member 31 and the above-described stepped portion. Thereby, the movement of the stationary blade 21 in the axial direction is restricted.

  The stationary blade 21 has a shape in which a conical body is integrally provided on one end surface (a surface located on the upstream side) of the cylindrical body. On the peripheral surface of the stationary blade 21, a plurality of protruding stationary blade blade portions 22 protruding in the radially outward direction are provided. The stationary blade blade 22 is inclined from the upstream side toward the downstream side while twisting in the right direction with respect to the axial center of the stationary blade 21, for example. The stationary blade 21 is fixed to the sealing member 32 and does not rotate.

A moving blade 25 is provided on the downstream side of the stationary blade 21.
FIG. 4 shows an enlarged view of the moving blade 25 in FIG.

  The upstream portion of the moving blade 25 is formed in a columnar shape, and a plurality of moving blade blade portions 26 projecting radially outward are provided on the peripheral surface thereof. Contrary to the stationary blade blade portion 22, the moving blade blade portion 26 is inclined from the upstream side to the downstream side while twisting leftward with respect to the axial center.

  A moving blade ring 28 is provided on the outer peripheral side of the moving blade 25 so as to surround the periphery of the moving blade blade portion 26. A flange portion 28a projecting radially outward is integrally provided at an upstream end portion of the rotor blade ring 28, and a magnet M1 is fixed to the rotor ring 28 on the downstream side of the flange portion 28a. Yes. The moving blade 25, the moving blade ring 28, and the magnet M1 rotate together.

  As shown in FIG. 3, the magnet M <b> 1 has a cylindrical shape, and N and S poles are alternately magnetized along the circumferential direction on the end surface.

  A bearing 34 fixed to the inner peripheral surface of the small diameter portion 20b of the cylindrical body 20 is provided on the downstream side of the moving blade 25, and the central shaft 35 projects from the center of the bearing 34 toward the upstream side. Is provided. The central shaft 35 passes through the center of the moving blade 25, and the moving blade 25 can rotate around the central shaft 35 while being restricted in radial displacement by the central shaft 35. The lower end portion of the moving blade 25 is slidably supported by the bearing 34.

A stator 50 is provided outside the small-diameter portion 20b of the cylindrical body 20 so as to face the downstream axial end surface (a magnetized surface in which the N pole and the S pole are magnetized) of the magnet M1. .
FIG. 2 is a perspective view of the stator 50.

  The stator 50 includes a cylindrical yoke 40 and a coil 36 housed in a space surrounded by the yoke 40 and wound in a cylindrical shape. The yoke 40 is formed by combining three first to third yokes 41 to 43, both of which are made of a magnetic material.

  The first yoke 41 is provided on the inner side of the coil 36 and opposed to the inner peripheral side portion of the coil 36, and from one end portion in the axial direction of the inner peripheral portion 62 to the inner peripheral portion 62. And a plurality of inductors 51 projecting outward at a substantially right angle. The plurality of inductors 51 are spaced apart from each other in the circumferential direction at equal intervals, and face the axial end surface of the coil 36.

  The second yoke 42 has an outer peripheral portion 63 provided outside the coil 36 and opposed to the outer peripheral side portion of the coil 36, and an axial end portion of the outer peripheral portion 63 with a diameter substantially perpendicular to the outer peripheral portion 63. A plurality of inductors 52 projecting inward. The plurality of inductors 52 are spaced apart from each other in the circumferential direction at equal intervals, and face the axial end surface of the coil 36.

  The inductors 51 of the first yoke 41 and the inductors 52 of the second yoke 42 are arranged alternately and spaced apart from each other along the circumferential direction. These inductors 51 and 52 are opposed to one axial end face of the coil 36. One axial end surface of the coil 36 faces the downstream end surface (magnetization surface) of the magnet M1 with the inductors 51 and 52 and the flange portion 20c of the cylindrical body 20 interposed therebetween as shown in FIG. ing.

  The third yoke 43 has a ring plate shape provided opposite to the other axial end surface of the coil 36 (an axial end surface opposite to the axial end surface to which the inductors 51 and 52 are opposed). The other end of each of the yoke 41 and the second yoke 42 in the axial direction (the axial end opposite to the axial end on the side where the inductors 51 and 52 are provided) is coupled.

  An axial end portion (upper end portion in FIG. 2) on the side where the inductor 51 is provided in the inner peripheral portion 62 of the first yoke 41 is partially cut out in a concave shape. That is, the notch 61 is intermittently formed in the circumferential direction at one axial end of the inner circumferential portion 62. The notch 61 is intermittently provided in the circumferential direction corresponding to the position of the inductor 52 of the second yoke 42. Since the cutout portion 61 is not formed at a position corresponding to the inductor 51 of the first yoke 41, the magnetic circuit connecting the inner peripheral portion 62 and the inductor 51 in the first yoke 41 is not cut off.

  Next, the operation of the faucet generator 1 and the faucet device 3 will be described.

  When the user holds his hand under the spout 6 of the faucet device 3, the sensor 7 senses this, the control unit 57 opens the electromagnetic valve 8, and the water supply passage 10 is communicated. Thereby, running water is supplied to the inside of the cylindrical body 20 of the faucet generator 1, and the water that flows inside the cylindrical body 20 is discharged from the water outlet 6. When the user moves his hand away from under the spout 6, the solenoid valve 8 is closed and water automatically stops.

  The flowing water that has flowed into the cylindrical body 20 flows on the conical surface of the stationary blade 21 and is diffused in the radially outward direction. In the structure illustrated in FIG. Thus, it flows through the stationary blade flow path 23 between the stationary blade blade portions 22.

  The swirling flow that has flowed through the stationary blade flow path 23 flows into the moving blade flow path 27 between the moving blade blade portions 26 and collides with the upper inclined surface of the moving blade blade portion 26. In this specific example, the swirl flow that flows into the blade flow path 27 is a flow swirled in the right direction with respect to the axial center. Rotate clockwise. The flowing water that has flowed through the rotor blade flow path 27 flows in the axial direction through the small-diameter portion 20 b of the cylindrical body 20, passes through the cylindrical body 20, and reaches the spout 6.

  When the moving blade 25 rotates in response to the force from the flowing water described above, the magnet M1 fixed thereto also rotates. When the magnet M1 rotates, the inductors 51 and 52 facing the axial end surface on the downstream side of the magnet M1 in which the N pole and the S pole are alternately magnetized along the circumferential direction, and these are integrated. The polarity of the yokes 41 and 42 is changed. Thereby, the direction of the interlinkage magnetic flux with respect to the coil 36 is changed, and an electromotive force is generated in the coil 36 to generate power. The electric power generated by the power generation is sent to the charger 56, and after being charged, for example, used for driving the electromagnetic valve 8, the sensor 7, and the control unit 57.

  In the present embodiment, the moving blade ring 28 provided so as to surround the periphery of the moving blade blade portion 26 functions as a partition wall that separates the moving blade flow path 27 and the inner wall surface of the cylindrical body 20. Therefore, more flowing water flows through the moving blade passage 27 inside the moving blade ring 28. By increasing the flow rate flowing along the moving blade portion 26, the rotational force of the moving blade 25 is further increased, and the power generation capacity can be increased.

  In the present embodiment, since the stator 50 is disposed opposite to the axial end surface of the magnet M1, the radial dimension is made smaller than in the case where the stator 50 is disposed opposite to the radially outer side of the magnet M1. be able to. Further, since the stator 50 is not disposed outside the rotor blade 25, the radial dimension of the rotor blade 25 can be increased, and the amount of power generation can be increased.

  In order for the rotor blade 25 and the magnet M1 fixed thereto to rotate, it is necessary to provide a gap between the rotor blade 25 and the fixing members (sealing member 32, cylinder 20) provided around them. This gap becomes a bypass flow path that does not involve the moving blade blade part 26. In the example of FIG. 1, a gap between the lower end surface of the sealing member 32 and the flange portion 28 a of the moving blade ring 28, and a gap between the outer peripheral surface of the magnet M <b> 1 and the inner peripheral surface of the large-diameter portion 20 a of the cylindrical body 20. And a bypass flow path is formed by the clearance gap between the downstream end surface of the magnet M1, and the flange part 20c of the cylindrical body 20. FIG.

  The flowing water that has flowed through the stationary blade 21 includes a bypass flow Fb that flows through a bypass flow path that does not pass through the moving blade blade section 26 (the moving blade flow path 27), and a main flow Fa that flows through the moving blade blade section 26 (the moving blade flow path 27). Branch to. Of these, the mainstream Fa flows through the blade flow passage 27 while rotating the blade 25 as described above, and flows out downstream as it is. On the other hand, the bypass flow Fb passes through the bypass flow path, flows downstream as it is without contributing to the rotation of the rotor blades 25, that is, power generation, and merges with the main stream on the downstream side of the rotor blades 25.

  Since the gap (bypass flow path) around the magnet M1 is narrow, the flow speed of the bypass flow Fb flowing therethrough is relatively high, and even if iron powder or the like is mixed in the water flow, it is difficult to adhere to the magnet M1. On the other hand, at the outlet of the bypass flow path, the main flow Fa and the bypass flow Fb collide and merge. Therefore, when the flow is stagnant and iron powder or the like is mixed in the water flow, it is a yoke 41 that is a magnetic material. Is easily attracted to the inner wall surface of the cylindrical body 20 near the outlet of the bypass channel. When iron powder or the like adheres to the inner wall surface of the cylindrical body 20 and the flow path in the cylindrical body 20 narrows, mainstream pressure loss occurs, and the conversion efficiency from the water flow energy to the rotational energy of the moving blade 25, that is, the power generation efficiency decreases. There is a fear.

  Therefore, in the present embodiment, as described above, the cutout portion 61 is provided at one end portion in the axial direction of the inner peripheral portion 62 of the first yoke 41 located near the outlet of the bypass flow path where the flow is likely to stagnate. . As a result, the magnetic region near the outlet of the bypass channel is reduced, so that the force for attracting iron powder or the like in the water stream to the inner wall surface of the cylinder 20 is weakened, and the iron powder or the like is less likely to adhere to the inner wall surface of the cylinder 20. Thereby, the pressure loss of the mainstream which flows through the moving blade flow path 27 can be suppressed, and the fall of power generation efficiency can be suppressed.

  FIG. 7 shows another specific example of the notched portion 61 formed in the inner peripheral portion 62 of the first yoke 41.

  In this specific example, the notch 61 extends from one axial end on the side where the inductor 51 is provided toward the other axial end opposite to the end. In the example shown in FIG. 7, the notch 61 is formed by partially sweeping the inner peripheral portion 62 from one axial end where the inductor 51 is provided to the vicinity of the center in the axial direction.

  After the bypass flow and the main flow merge, the water flow flows along the axial direction of the cylindrical body 20, but the inner peripheral portion 62 of the first yoke 41 facing the inner wall surface of the cylindrical body 20 is sufficient as shown in FIG. By skipping (notching), the magnetic region facing the inner wall surface of the cylinder 20 is greatly reduced, and the effect of suppressing the adhesion of iron powder or the like to the inner wall surface of the cylinder 20 is further increased.

  As a result of investigations by the inventors, if the axial length b of the notch 61 is 1/5 or more of the overall axial length a of the inner peripheral portion 62, the inside of the cylindrical body 20 It came to the knowledge that adhesion of iron powder etc. to a wall surface can be prevented almost.

  Note that the cutout portion 61 may be formed over the entire axial direction of the inner peripheral portion 62, but in this case, the first yoke 41 is divided in accordance with the number of inductors 51. In consideration of the number of points and assemblability, it is desirable that the notch 61 is kept halfway in the axial direction so that the first yoke 41 can be handled as one component.

  In addition, by intermittently forming the notch 61 in the circumferential direction, the vicinity of the inductor 51 in the first yoke 41 is magnetically insulated in the circumferential direction. For this reason, the magnetic path formed along the inner peripheral surface of the first yoke 41 can be suppressed, and the interlinkage magnetic path contributing to the power generation of the coil 36 can be prevented from being weakened.

  Next, FIG. 8 is a schematic cross-sectional view of a faucet generator according to another embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same component as embodiment shown in FIG. 1 mentioned above, and the detailed description is abbreviate | omitted.

  As shown in FIG. 10, the magnet M <b> 2 in the present embodiment has a cylindrical shape, and N and S poles are alternately magnetized along the circumferential direction on the outer peripheral surface thereof.

A stator 80 is provided outside the cylindrical body 20.
FIG. 9 shows a perspective view of the stator 80.

  The stator 80 includes a cylindrical yoke 70 and a coil 36 that is accommodated in a space surrounded by the yoke 70 and wound in a cylindrical shape. The yoke 70 is formed by combining three first to third yokes 71 to 73, both of which are made of a magnetic material.

  The first yoke 71 is radially outward from the inner peripheral portion 92 facing the inner peripheral portion of the coil 36 and one end portion in the axial direction of the inner peripheral portion 92 at a substantially right angle to the inner peripheral portion 92. It has an end surface portion 93 that is provided so as to protrude and face one end surface in the axial direction of the coil 36, and a plurality of inductors 81 that are provided so as to protrude upward from the outer peripheral side edge portion of the end surface portion 93 in FIG. 9. The plurality of inductors 81 are spaced apart from each other in the circumferential direction at equal intervals.

  The second yoke 72 is provided outside the coil 36 and protrudes upward in FIG. 9 from an outer peripheral portion 94 facing the outer peripheral side portion of the coil 36 and one axial end portion of the outer peripheral portion 94. And a plurality of inductors 82. The plurality of inductors 82 are spaced apart from each other in the circumferential direction and are provided at equal intervals.

  The inductors 81 of the first yoke 71 and the inductors 82 of the second yoke 72 are arranged alternately and spaced apart from each other along the circumferential direction. The inductors 81 and 82 are provided immediately above the outer peripheral side edge of the coil 36 and protrude in the axial direction, and the distances from the center of the coil 36 to the inductors 81 and 82 are substantially the same. As shown in FIG. 8, each inductor 81, 82 faces the outer peripheral surface (magnetized surface) of the magnet M <b> 2 with the large-diameter portion 20 a of the cylindrical body 20 interposed therebetween.

  The third yoke 73 has a ring plate shape provided to face the other axial end surface of the coil 36 (an axial end surface opposite to the axial end surface to which the end surface portion 93 of the first yoke 71 faces). The first yoke 71 and the second yoke 72 are coupled to the other axial ends of the first yoke 71 and the second yoke 72, respectively.

  The end surface portion 93 of the inner peripheral portion 92 of the first yoke 71 and the end portion in the axial direction on the side where the inductor 81 is provided (the upper end portion in FIG. 9) are partially cut out in a concave shape. That is, a notch 91 is intermittently formed in the circumferential direction at one axial end of the inner circumferential portion 92. The notch 91 is intermittently provided in the circumferential direction corresponding to the position of the inductor 82 of the second yoke 72. Since the cutout portion 91 is not formed at a position corresponding to the inductor 81 of the first yoke 71, the magnetic circuit connecting the inner peripheral portion 92 and the inductor 81 is not cut off in the first yoke 71.

  Also in the present embodiment, when the rotor blade 25 rotates, the magnet M2 fixed thereto also rotates. When the magnet M2 rotates, the inductors 81 and 82 facing the outer peripheral surface of the magnet M2 in which the N pole and the S pole are alternately magnetized along the circumferential direction, and the yoke 71 integrated therewith, The polarity of 72 changes. Thereby, the direction of the interlinkage magnetic flux with respect to the coil 36 is changed, and an electromotive force is generated in the coil 36 to generate power.

  Also in the present embodiment, the aforementioned notch 91 is provided at one end in the axial direction of the inner peripheral portion 92 of the first yoke 71 located near the outlet of the bypass flow path where the flow is likely to stagnate. As a result, the magnetic region near the outlet of the bypass channel is reduced, so that the force for attracting iron powder or the like in the water stream to the inner wall surface of the cylinder 20 is weakened, and the iron powder or the like is less likely to adhere to the inner wall surface of the cylinder 20. Thereby, the pressure loss of the mainstream which flows through the moving blade flow path 27 can be suppressed, and the fall of power generation efficiency can be suppressed.

  Next, FIG. 11 shows another specific example of the faucet generator according to the present embodiment, and FIG. 12 is a schematic view showing a stator included in the faucet generator.

  In this specific example, in addition to the notch 91 formed at one end in the axial direction of the inner peripheral portion 92 of the first yoke 71 described above, the portion facing the axial end surface on the downstream side of the magnet M2. An end surface portion 93 of a certain first yoke 71 is also partially cut off. That is, the notch 95 is intermittently formed in the end surface portion 93 of the first yoke 71 in the circumferential direction. Since the notch 95 is not formed at a position corresponding to the inductor 81 of the first yoke 71, the magnetic circuit connecting the inner peripheral portion 92 and the inductor 81 in the first yoke 71 is not cut off.

  In the magnet M2 whose peripheral surface is magnetized, the magnetic flux from the peripheral magnetic pole leaks slightly on the axial end surface side, but the magnetic flux is weak, so the end surface in the axial direction of the peripheral magnetized magnet M2 is weak. When iron powder or the like is included in the water flow that flows through the gap (bypass flow path) between (the downstream end face in FIG. 11) and the inner wall surface of the cylindrical flange portion 20c, the iron powder or the like is the end face of the magnet M2. Rather, it is drawn closer to the yoke 71 side and easily adheres to the inner wall surface of the flange portion 20c of the cylindrical body 20.

  Therefore, in this specific example, as described above, the notch portion 95 is formed in the end surface portion of the first yoke 71 facing the end surface of the magnet M2, thereby facing the inner wall surface of the flange portion 20c of the cylindrical body 20. Since the magnetic region is reduced, the force of attracting the iron powder or the like in the water flow to the inner wall surface of the flange portion 20c is weakened, and the iron powder or the like is less likely to adhere to the inner wall surface.

  FIG. 13 shows another specific example of the notch 91 formed in the inner periphery 92 of the first yoke 71.

  In this specific example, the notch 91 extends from one axial end on the side where the inductor 81 is provided toward the other axial end opposite to the end. In the example shown in FIG. 13, the notch 91 is formed by partially sweeping the inner peripheral portion 92 from one axial end where the inductor 81 is provided to the vicinity of the center in the axial direction.

  After the bypass flow and the main flow are merged, the water flow flows along the axial direction of the cylindrical body 20, but the inner peripheral portion 92 of the first yoke 71 facing the inner wall surface of the cylindrical body 20 is sufficient as shown in FIG. By skipping (notching), the magnetic region facing the inner wall surface of the cylinder 20 is greatly reduced, and the effect of suppressing the adhesion of iron powder or the like to the inner wall surface of the cylinder 20 is further increased.

  As a result of investigations by the inventors, if the axial length b of the notch 91 is 1/5 or more with respect to the overall axial length a of the inner peripheral portion 92, the inside of the cylindrical body 20 It came to the knowledge that adhesion of iron powder etc. to a wall surface can be prevented substantially.

  Next, FIG. 14 shows a faucet generator according to still another embodiment of the present invention, and FIG. 15 is a schematic view showing a stator provided in the faucet generator.

  In the present embodiment, the axial end portion (upper end portion in FIG. 15) on the side where the inductor 52 is provided in the outer peripheral portion 63 of the second yoke 42 is partially cut out in a concave shape. That is, the notch 68 is intermittently formed in the circumferential direction at one axial end of the outer periphery 63. Since the cutout portion 68 is not formed at a position corresponding to the inductor 52 of the second yoke 42, the magnetic circuit connecting the outer peripheral portion 63 and the inductor 52 in the second yoke 42 is not cut off.

  In the bypass flow path, the flow path from the portion between the outer peripheral surface of the magnet M1 and the cylindrical body 20 large diameter portion 20a to the lower end surface of the magnet M1 and the flange portion 20c of the cylindrical body 20 cranks at a substantially right angle. The flow is stagnant and easily stagnant. Therefore, in the crank portion of the bypass channel, iron powder or the like in the water flow is attracted to the yoke 42 and easily adheres to the inner wall surface of the cylindrical body 20.

  In the present embodiment, as described above, the notch portion 68 is provided at one end portion in the axial direction of the outer peripheral portion 63 of the second yoke 42 located in the vicinity of the crank portion of the bypass flow path where the flow tends to stagnate. Thereby, since the magnetic body area | region near a crank part reduces, the force which attracts the iron powder etc. in a water flow to the cylinder 20 inner wall surface becomes weak, and iron powder etc. do not adhere to the cylinder 20 inner wall surface easily.

  When the cutout portions 61 and 68 are formed in both the inner peripheral portion 62 of the first yoke 41 and the outer peripheral portion 63 of the second yoke 42, the first yoke 41 and the second yoke 42 with respect to the magnet M1. As shown in FIG. 16, the axial length (spot depth) of the notch 61 on the inner peripheral part and the notch 68 on the outer peripheral part should be approximately the same, as shown in FIG. Is desirable.

  As shown in FIG. 17, the second yoke 72 of the stator applied to the circumferentially magnetized magnet is also the axial end of the outer peripheral portion 94 on the side where the inductor 82 is provided (in FIG. 17). The upper end portion may be partially cut out in a concave shape. That is, the notch 98 is intermittently formed in the circumferential direction at one axial end of the outer peripheral portion 94. Since the notch 98 is not formed at a position corresponding to the inductor 82 of the second yoke 72, the magnetic circuit connecting the outer peripheral portion 94 and the inductor 82 in the second yoke 72 is not cut off.

  Even in this configuration, by providing the notch portion 98 as described above at one end portion in the axial direction of the outer peripheral portion 94 of the second yoke 72 located in the vicinity of the crank portion of the bypass flow path where the flow is likely to stagnate, Since the magnetic region near the crank portion is reduced, the force for attracting iron powder or the like in the water stream to the inner wall surface of the cylinder 20 is weakened, and the iron powder or the like is less likely to adhere to the inner wall surface of the cylinder 20.

  Also in this stator, when the cutout portions 91 and 98 are formed in both the inner peripheral portion 92 of the first yoke 71 and the outer peripheral portion 94 of the second yoke 72, respectively, the first yoke with respect to the magnet M2 is used. In order to secure the magnetic force balance between the first yoke 72 and the second yoke 72, as shown in FIG. 18, the axial lengths of the notched portions 91 of the inner peripheral portion 92 and the notched portions 98 of the outer peripheral portion 94 (spotted) It is desirable to make the depth) comparable.

  Further, by intermittently forming the notches 91 in the circumferential direction, the vicinity of the inductor 81 in the first yoke 71 is magnetically insulated in the circumferential direction. For this reason, the magnetic path formed along the inner peripheral surface of the first yoke 71 can be suppressed, and the interlinkage magnetic path contributing to the power generation of the coil 36 can be prevented from being weakened. In addition, by intermittently forming the notch 98 in the circumferential direction, the vicinity of the inductor 82 in the second yoke 72 is magnetically insulated in the circumferential direction. For this reason, the magnetic path formed along the inner peripheral surface of the second yoke 72 can be suppressed, and the interlinkage magnetic path contributing to the power generation of the coil 36 can be prevented from being weakened.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to them, and various modifications can be made based on the technical idea of the present invention.

  As shown in FIG. 19, the coil 36 may be disposed on the upstream side of the magnet M. In the magnet M whose end face (upstream end face) is magnetized, an inductor similar to the inductors 51 and 52 shown in FIG. 2 described above is connected to the upstream end face of the magnet M via the tube wall of the cylindrical body 20. Opposite to (magnetized surface). In the case where the outer peripheral surface of the magnet M is magnetized, inductors similar to the inductors 81 and 82 shown in FIG. 9 described above are formed on the outer peripheral surface (magnetized surface) of the magnet M via the tube wall of the cylindrical body 20. opposite.

  In the vicinity of the outlet of the stationary blade channel 23, the channel is expanded rapidly, and the flow is stagnation. Therefore, when iron powder or the like is mixed in the stagnation water flow, it is attracted to the yoke and easily adheres to the inner wall surface of the cylindrical body 20 near the outlet of the stationary blade channel 23.

  In the configuration of FIG. 19, if the notch 61 is formed at the axial end (the lower end in FIG. 19) on the side where the inductor is provided on the inner periphery of the yoke, the flow of the stationary blade is likely to stagnate. Since the magnetic region near the exit of the path 23 is reduced, the force of attracting iron powder or the like in the water stream to the inner wall surface of the cylinder 20 is weakened, and the iron powder or the like is less likely to adhere to the inner wall surface of the cylinder 20.

  Further, in the bypass flow path, the flow path from the portion between the upper end surface of the magnet M and the inner wall surface of the cylinder 20 to the outer peripheral surface of the magnet M and the inner wall surface of the cylinder 20 is cranked at a substantially right angle. , The flow is stagnant and easy to stagnate. Accordingly, in the configuration of FIG. 19, if the notch 68 is formed at the axial end (the lower end in FIG. 19) on the side where the inductor is provided on the outer periphery of the yoke, the crank portion where the flow is likely to stagnate. Since the magnetic material region in the vicinity is reduced, the force for attracting iron powder or the like in the water flow to the inner wall surface of the cylinder 20 is weakened, and the iron powder or the like is less likely to adhere to the inner wall surface of the cylinder 20.

  In the configuration using the outer peripheral surface magnetized type magnet M2 and the stator having inductors 81 and 82 opposed to the outer peripheral surface of the magnet M2, as shown in FIG. 20 or FIG. Even in this case, the notch 91 is provided at the axial end (upper end in FIG. 20) of the inner periphery of the first yoke 71 on the side where the inductor 81 is provided. If formed, the magnetic region near the outlet of the bypass channel where the flow is likely to stagnate is reduced, so that the force of attracting iron powder or the like in the water flow to the inner wall surface of the cylinder 20 is weakened, and iron powder is applied to the inner wall surface of the cylinder 20 Etc. are difficult to adhere.

  Further, by intermittently forming the notches 91 in the circumferential direction, the vicinity of the inductor 81 in the first yoke 71 is magnetically insulated in the circumferential direction. For this reason, the magnetic path formed along the inner peripheral surface of the first yoke 71 can be suppressed, and the interlinkage magnetic path contributing to the power generation of the coil 36 can be prevented from being weakened. Further, by intermittently forming a notch in the outer circumferential portion of the second yoke 72 in the circumferential direction, a portion in the vicinity of the inductor 82 in the second yoke 72 is magnetically insulated in the circumferential direction. For this reason, the magnetic path formed along the inner peripheral surface of the second yoke 72 can be suppressed, and the interlinkage magnetic path contributing to the power generation of the coil 36 can be prevented from being weakened.

  Further, in each of the above-described embodiments, by providing the magnets M1 and M2 so as to surround the periphery of the rotor blade blade portion 26 without providing the rotor blade ring 28, the inner surface of the magnet causes the rotor blade flow path. Alternatively, the outflow of the flowing water flowing through the outer diameter 27 may be prevented.

1 is a schematic cross-sectional view of a faucet generator according to an embodiment of the present invention. The model perspective view of the stator in the generator for the faucets. The model perspective view of the magnet in the generator for faucets. The schematic cross-section perspective view of the moving blade and moving blade ring in the faucet generator. The schematic diagram showing the example of attachment of the faucet device concerning the embodiment of the present invention. The schematic diagram showing the structure inside the water faucet device. The figure which enlarged the axial direction length (bore face depth) of the notch part rather than FIG. The schematic cross section of the generator for faucets concerning other embodiments of the present invention. The model perspective view of the stator in the generator for the faucets. The model perspective view of the magnet in the generator for faucets. The schematic cross section showing the other specific example in the generator for faucets which concerns on 2nd Embodiment. FIG. 12 is a schematic perspective view of a stator in the specific example of FIG. 11. The figure which enlarged the axial direction length (bore face depth) of the notch part of an inner peripheral side rather than FIG. The schematic cross section of the generator for faucets concerning other embodiments of the present invention. The model perspective view of the stator in the generator for the faucets. In the stator of FIG. 15, a schematic view in which the inner circumferential side cutout portion and the outer circumferential side cutout portion have the same axial length (spotted depth). The schematic perspective view of the stator in the generator for faucets which concerns on other embodiment of this invention. FIG. 18 is a schematic diagram in which the axial length (bore face depth) is the same in the inner peripheral side cutout portion and the outer peripheral side cutout portion in the stator of FIG. 17. The schematic diagram showing the example which provided the stator in the upstream of the magnet in the faucet generator which concerns on embodiment of this invention. The schematic diagram showing the example which the coil protrudes in the diameter outward from the magnet in the faucet generator which concerns on embodiment of this invention. The schematic diagram showing the other example in which the coil protrudes in diameter outward rather than the magnet in the faucet generator which concerns on embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Faucet generator, 3 ... Faucet device, 7 ... Sensor, 8 ... Solenoid valve, 21 ... Stator blade, 22 ... Stator blade blade part, 23 ... Stator blade flow path, 25 ... Rotor blade, 26 ... Motion Blade blade section 27 ... Rotor blade flow path, 28 ... Rotor blade ring, 36 ... Coil, 41 ... First yoke, 42 ... Second yoke, 51, 52 ... Inductor, 61 ... Notch, 62 ... Inside Peripheral part, 63 ... outer peripheral part, 68 ... notched part, 71 ... first yoke, 72 ... second yoke, 81, 82 ... inductor, 91 ... notched part, 92 ... inner peripheral part, 94 ... outer peripheral part , 95 ... Notched part, 98 ... Notched part

Claims (5)

A moving blade having a moving blade blade provided in the water supply flow channel so as to be rotatable around a central axis substantially parallel to the water supply flow channel and projecting in a radial direction;
A blade ring provided around the periphery of the blade portion and rotatable integrally with the blade;
A cylindrical shape in which N poles and S poles are alternately magnetized along the circumferential direction, and a magnet that can rotate integrally with the moving blade;
A coil provided outside the water supply channel;
An inner periphery facing the inner periphery of the coil, an outer periphery facing the outer periphery of the coil, and a plurality of inductors spaced apart from each other in the circumferential direction and facing the magnetized surface of the magnet A yoke having
With
The faucet generator according to claim 1, wherein an axial end of the yoke on the side where the inductor is provided is partially cut off. A moving blade having a moving blade blade provided in the water supply flow channel so as to be rotatable around a central axis substantially parallel to the water supply flow channel and projecting in a radial direction;
A magnet having N and S poles alternately magnetized along the circumferential direction, surrounding the periphery of the blade blade and rotatable integrally with the blade;
A coil provided outside the water supply channel;
An inner periphery facing the inner periphery of the coil, an outer periphery facing the outer periphery of the coil, and a plurality of inductors spaced apart from each other in the circumferential direction and facing the magnetized surface of the magnet A yoke having
With
The faucet generator according to claim 1, wherein an axial end of the yoke on the side where the inductor is provided is partially cut off.   The faucet power generation according to claim 1 or 2, wherein the notched portion extends from the end portion in a direction toward an axial end opposite to the end portion. Machine. The magnet has an N pole and an S pole magnetized on its peripheral surface,
The faucet generator according to any one of claims 1 to 3, wherein a portion of the yoke that faces the axial end surface of the magnet is partially cut away.   The faucet according to any one of claims 1 to 4, wherein an axial end portion of the yoke on the side where the inductor is provided is partially cut off. Generator.

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