JP6239375B2 - Water-resistant non-contact feeder - Google Patents

Description

The present invention relates to a water-resistant non-contact supply device used in a place where water is used such as a bathroom or kitchen (hereinafter also referred to as “water use place”).

Care devices that assist caregivers and caregivers are used in bathrooms, etc. When using electricity for these care devices, there is a risk of electric shock if power is supplied from a commercial power source. Power is supplied with a rechargeable battery or the like. In this case, when the battery runs out, it is necessary to use a spare battery or recharge it, which is extremely troublesome.

Therefore, Patent Documents 1 and 2 propose a non-contact outlet and a plug, and an inverter that is supplied with power from a commercial power source is provided on the outlet side to supply power to the primary coil and a secondary provided on the plug side. A non-contact power transmission device has been proposed in which power is supplied to a coil in a non-contact manner, and rectified and smoothed to supply power.
Patent Document 3 proposes providing a plurality of non-contact plugs for one non-contact outlet. Patent Document 4 discloses that a resonance circuit including a resonance coil and a resonance capacitor on the secondary side is provided separately from the secondary coil, and power is sent from the primary side to the secondary side in a non-contact manner. Yes.

JP 11-97262 A JP 2002-10535 A JP 2011-50163 A Japanese Patent No. 4318742

However, the devices described in Patent Documents 1 to 3 use an inverter to pass high frequency to the primary coil. However, if the distance between the primary coil and the secondary coil is separated by a wall or the like, the energy transmission efficiency deteriorates. There is a problem. In the devices of Patent Documents 1 to 3, a resonance capacitor is provided in parallel with the primary coil and the secondary coil. However, in this case, an excessive resonance current flows in the primary coil and the secondary coil in addition to the load current. It will be. Furthermore, there is a problem that the primary coil and the secondary coil also function as resonance coils, and it is difficult to control the number of turns to an optimum value. And there exists a problem that the power transmission efficiency with respect to distance is worse than the case where a resonance coil is arrange | positioned independently.
On the other hand, in the invention described in Patent Document 4, in order to reduce the capacity of the resonant capacitor, the number of turns of the secondary side resonance coil is increased to generate a relatively high voltage.

The present invention has been made in view of such circumstances, and is an efficient water-resistant non-contact supply device that can supply power to equipment and the like disposed in a water use place such as a bathroom, does not expose a high voltage portion, and is efficient. The purpose is to provide.

A water-resistant non-contact supply device according to the present invention that meets the above-described object includes an inverter that receives power supply from a commercial power source and a primary coil that is supplied with high-frequency power from the inverter, and from a water use place where a power supply target device is disposed. A water-resistant non-contact supply device having a primary side circuit arranged in an electrically isolated state and a secondary side circuit arranged in the water use place and receiving power from the primary side circuit in a non-contact manner. ,
A resonance circuit having a resonance capacitor and a resonance coil connected in series is provided in the primary side circuit, the secondary side circuit, or the primary side circuit and the secondary side circuit , and the current of the resonance circuit is constant. In order not to exceed the value, current suppression means was provided in series with the resonance circuit .
Here, the state of being electrically isolated means a state of being electrically insulated from the water use place and being partitioned by a wall or being covered with an insulating material even in the water use place. .
As a result, power can be sent relatively far in an insulated state.

In the water-resistant non-contact supply device according to the present invention, the plurality of secondary circuits may be electromagnetically connectable to the primary circuit. Thereby, a plurality of loads can be connected to one power source.

In the water-resistant non-contact supply device according to the present invention, the secondary circuit is provided with a rectifying circuit for rectifying the received high frequency into direct current, and is 25 volts or less (more preferably 14 volts or less, and further 7 volts or less). It is preferable to output a low-voltage direct current.

In the water-resistant non-contact supply device according to the present invention, the low-voltage direct current may be used to charge a battery or may directly drive a device.
Thereby, the secondary side load (power supply target device) can be used.

In the water-resistant non-contact supply device according to the present invention, the power supply to the inverter of the primary circuit may be turned on and off by a waterproof switch provided at the water use place. As a result, the water-resistant non-contact supply device can be turned on and off from the water use place.

Water contactless supply apparatus according to the present invention, as the current of the resonant circuit does not exceed a certain value, there is provided a current control means in series with said resonant circuit. Thereby, the current of the load can be limited, and the heat generation of the water-resistant non-contact supply device itself can be suppressed.

In the water-resistant non-contact supply device according to the present invention, the secondary circuit may be provided with a U-shaped ferrite core or an E-type ferrite core that concentrates magnetic flux on the primary circuit. As a result, the leakage magnetic flux is reduced and the power transmission efficiency is also increased.

In the water-resistant non-contact supply device according to the present invention, it is preferable that a part or all of the primary circuit is disposed on a wall or a recess of the water use place. This facilitates the installation of the secondary load from the water use site.

In the water-resistant non-contact supply device according to the present invention, the secondary circuit is preferably used in a non-grounded state.

In the water-resistant non-contact supply device according to the present invention, the secondary circuit can be attached to a wall surface, a floor surface, or a ceiling surface of the water use place via a latching jig provided in the water use place. It is good to have. Thereby, a water-resistant non-contact supply device can be retrofitted to the water use place.

In the water-resistant non-contact supply device according to the present invention, there is no fear of electric shock because the primary side circuit is provided in an insulated state inside or outside the wall partitioning the water use place and the secondary side circuit is provided in the water use place. Since the resonance circuit is provided in one or both of the primary side circuit and the secondary side circuit, large power can be supplied more efficiently.
In particular, when the resonant circuit is arranged only in the primary side circuit, the secondary side circuit can be reduced in size, and further, the heat generation in the secondary side circuit can be suppressed.
Further, when the resonant circuit is arranged only in the secondary side circuit, even if there is a distance between the primary side circuit and the secondary side circuit, larger power can be supplied to the secondary side circuit.

(A) is schematic explanatory drawing of the water-resistant non-contact supply apparatus which concerns on the 1st Embodiment of this invention, (B) shows the partial circuit diagram of the water-resistant non-contact supply apparatus. It is explanatory drawing of the water-resistant non-contact supply apparatus which concerns on the 2nd Embodiment of this invention. It is explanatory drawing of the water-proof type non-contact supply apparatus which concerns on the 3rd Embodiment of this invention. (A), (B), (C) is explanatory drawing of the water-resistant non-contact supply apparatus which concerns on the 4th-6th embodiment of this invention, respectively. It is explanatory drawing of the water-proof type non-contact supply apparatus which concerns on the 7th Embodiment of this invention. (A), (B) is explanatory drawing of the water-resistant non-contact supply apparatus which concerns on the 8th Embodiment of this invention. It is explanatory drawing of the water-proof type non-contact supply apparatus which concerns on the 9th Embodiment of this invention. It is explanatory drawing of the water-proof type non-contact supply apparatus which concerns on the 10th Embodiment of this invention.

As shown in FIGS. 1 (A) and 1 (B), the water-resistant non-contact supply device 10 according to the first embodiment of the present invention is isolated outside the bathroom (an example of a water use place) 11, that is, The primary coil 12 provided in an insulated state and isolated from the bathroom 11 and the inverter 13 for supplying high-frequency power to the primary coil 12 are disposed in the bathroom 11 and contactless from the primary circuit 14. And a secondary circuit 15 that receives power. Electric power is supplied from the secondary circuit 15 to a power supply target device 16 (which may be referred to as a bath transporter, a battery, or a load) that is a load disposed in the bathroom 11. Reference numeral 17 denotes a wall that separates the bathroom 11 from the outside. The power supplied to the inverter 13 may be a battery or a generator (the same applies to the following embodiments). These will be described in detail below.

The inverter 13 uses a commercial power source as a power source, converts it into a direct current, and further converts it into an alternating current of 10 kHz to 100 kHz. For this control, PWM control is performed to reduce power loss.
The primary coil 12 constituting the primary side circuit 14 has a diameter of about 5 to 20 cm and is formed in a spiral plane shape having 10 to 30 turns (number of turns). The inverter 13 is provided with a power switch 18 so that it can be turned on and off. This switch 18 is preferably waterproof and can be operated from within the bathroom 11. Moreover, you may operate from the bathroom 11 or the bathroom 11 outside with the remote control using an electromagnetic wave or light.

The secondary side circuit 15 includes a resonance coil 19 concentrically arranged, a secondary coil 20, a first control circuit 22 including a rectifier circuit 21, and a second control circuit that performs current control of the resonance coil 19 (for example, , Current suppression means) 23. The resonant coil 19 and the secondary coil 20 are flat and wound in a planar shape, and each has a diameter of 5 to 15 cm. The number of turns of the resonant coil 19 is about 10 to 25 turns, the number of turns n2 of the secondary coil 20 is 1/3 to 1/10 of the number of turns n1 of the primary coil 12, and a low voltage (for example, 25 volts or less) ) Is output.

The primary coil 12, the resonance coil 19, and the secondary coil 20 are preferably spiral flat wound, but they may be cylindrical wound, and the outer shape may be a polygon, a rectangle in addition to a circle in plan view. (Rectangular, square) or the like (the same applies to the following embodiments). The coil is preferably a litz wire, but may be an enameled wire or a coated conductor.

The wall 17 isolates the bathroom 11 and is usually formed of plastic, concrete, ceramic, or wood, but when it is made of metal (eg, iron plate, aluminum alloy, etc.), it does not pass magnetic fields. Therefore, the portion is cut out and the sealed primary side circuit 14 is embedded. In this case, it is preferable to perform waterproofing so that water does not enter the primary circuit 14 even when water is applied from the bathroom 11 side, and water does not ooze out from the bathroom 11 side.

The first control circuit 22 includes a rectifier circuit 21 that rectifies high-frequency power received by the secondary coil 20 to generate a low voltage (for example, 25 volts or less) direct current, a reactor that removes rectified alternating current pulsation, a capacitor have. If necessary, low voltage control may be performed so as to supply a constant voltage to the load 16 using an active element such as a thyristor or a transistor.

The second control circuit 23 controls the resonance current flowing in the resonance circuit including the resonance coil 19 and the resonance capacitor 25 connected in series. As shown in FIG. A resistor 26 and a chopper circuit 27 are connected in series to the circuit. The chopper circuit 27 is controlled by the current and voltage flowing through the load 16, and when the current flowing through the load 16 exceeds a certain current, the current flowing through the resonance coil 19 decreases, thereby reducing the magnetic flux received from the primary coil 12. The induced voltage of the secondary coil 20 is lowered.

The second control circuit 23 prevents the resonance coil 19 from generating heat, and the water-resistant non-contact supply device 10 can be continuously operated. Note that a temperature sensor may be provided in the resonance coil 19 so that the current flowing through the resonance coil 19 can be controlled to be reduced when the temperature sensor exceeds a certain temperature. Reference numeral 29 denotes a latching jig for the secondary circuit 15 of the water-resistant non-contact supply device 10, and is usually fixed to a wall 17 (or a floor surface or a ceiling surface) on the bathroom 11 side.
The entire secondary circuit 15 is, for example, completely molded with a resin or the like, for example, a rectangular parallelepiped block, as in FIGS. 4A, 4B, and 4C described later. An insulated conductor (capty) for supplying power to the load is connected to this block.

Then, operation | movement of this water-proof type non-contact supply apparatus 10 is demonstrated.
The output of the secondary side circuit 15 is connected to a power supply target device (load) 16 and the primary side circuit 14 is connected to a power source. Next, the power source switch 18 of the primary side circuit 14 is turned on. As a result, a high frequency current flows from the inverter 13 to the primary coil 12, a high frequency magnetic flux is generated toward the resonance coil 19 and the secondary coil 20, a current flows through the secondary coil 20, and power is supplied to the power supply target device 16. When the load current is larger than the predetermined value, the second control circuit 23 operates to reduce the resonance current and control the current flowing through the secondary coil 20.

In this embodiment, the resonance frequency of the resonance circuit constituted by the resonance coil 19 and the resonance capacitor 25 with respect to the frequency f of the high frequency power oscillated from the inverter 13 is in a range of 0.01 to 0.1 times. Therefore, it is preferable to deviate to the plus side or minus side. As a result, it is possible to prevent an excessive current from flowing through the resonance coil 19 (the same applies to embodiments using the following resonance circuit).

For example, when the primary coil 12 is configured by a spiral flat winding as described in Patent Document 4, the back side of the primary coil 12 (that is, the direction opposite to the direction in which the secondary coil 20 is disposed). It is preferable to arrange a ferrite core plate or the like. Also in the secondary coil 20, it is preferable to arrange a ferrite core plate on the side opposite to the resonance coil 19. This prevents magnetic flux leakage, prevents unnecessary heating, and reduces power loss (the same applies to the following embodiments).

Subsequently, a water-resistant non-contact supply device 32 according to a second embodiment of the present invention will be described with reference to FIG. In addition, the same number is attached | subjected to the component same as the water-resistant non-contact supply apparatus 10 which concerns on 1st Embodiment, and detailed description is abbreviate | omitted (the same also in the following embodiment).

As shown in FIG. 2, the water-resistant non-contact supply device 32 is isolated outside the bathroom (an example of a water use place) 11, i.e., isolated from the bathroom 11 and insulated from the primary side. The primary side circuit 34 provided with the coil 33, the primary coil 12, and the inverter 13 which supplies electric power to this, and the secondary side circuit 35 arrange | positioned in the bathroom 11 are included.

A resonance capacitor 33a is connected in series to the resonance coil 33 on the primary side, and the resonance coil 33 and the resonance capacitor 33a constitute a resonance circuit. The resonance coil 33 and the resonance capacitor 33a are spaced apart from each other in order to increase the alternating magnetic flux generated from the primary coil 12. Electric power is efficiently supplied to the secondary coil 20.

Since a resonance current flows through the resonance coil 33 and generates heat due to the coil resistance, it can be arranged outside the bathroom 11 in a fixed state to promote cooling.
Note that the resonance frequency of the resonance circuit is shifted from the frequency of the inverter 13 within a minute range (0.01 to 0.1 times).
In addition, a third control circuit (for example, a current suppressing unit) may be provided in the primary side resonance circuit to control the current flowing through the resonance circuit below a certain level.

Next, a water-resistant non-contact supply device 37 according to the third embodiment of the present invention shown in FIG. 3 will be described. The water-resistant non-contact supply device 37 is isolated outside the bathroom (an example of a water use place) 11, that is, is isolated from the bathroom 11 and insulated from each other. And the primary side circuit 34 provided with the inverter 13 which supplies electric power to this, and the secondary side circuit 15 arrange | positioned in the bathroom 11 are included.

This water-resistant non-contact supply device 37 is a combination of the water-proof non-contact supply device 10 according to the first embodiment and the water-resistant non-contact supply device 32 according to the second embodiment. The secondary side circuit 15 has the resonance coils 33 and 19 to supply the alternating magnetic field of the primary coil 12 to the secondary coil 20 more efficiently and far away.

FIGS. 4A, 4B, and 4C illustrate water-resistant non-contact supply devices according to fourth to sixth embodiments of the present invention, respectively. A primary circuit and a secondary circuit As the main part, any one of the water-resistant non-contact supply devices 10, 32, and 37 according to the above embodiments is used. The water-resistant non-contact supply devices 10, 32, 37 according to the above embodiments and the water-resistant non-contact supply devices according to the fourth to sixth embodiments are latches for attaching the secondary circuit to a wall or the like. Since the jigs 40 to 42 are different, these will be described.

As shown in FIGS. 4A, 4 </ b> B, and 4 </ b> C, the secondary circuit 15 (35 is the same) has rectangular parallelepiped blocks 44 to 46, and a power supply target device that becomes a load from a part thereof. Insulated conductive wires (two cores) 48 to 50 for supplying power to 16 are connected. The block 46 is provided with a latching portion 47 on the upper side separately from the rectangular parallelepiped block.

The latching jigs 40 and 41 are in the shape of an open box with a bottom, and notches 52 and 53 through which the insulated conductors 48 and 49 are passed are formed in part of the side plates. The latching jig 42 is configured such that a rectangular parallelepiped block 46 enters the inside of the groove having a cross-sectional groove shape.
Each of the latching jigs 40 to 42 has flange portions 55 and 56 on both sides, and can be attached to the wall 17 by screws, an adhesive, or the like.

Primary side circuits 14 and 34 (a part or all) are arranged on the back side of the wall 17 to which the latching jigs 40 to 42 are attached or in the wall 17 (for example, a depression).
With the above structure, the secondary side circuit 15 can be attached and detached very easily. Further, the secondary output can completely separate the + and − lines from the ground, and no voltage is generated even if one line is touched (the same applies to the following embodiments).

FIG. 5 shows a water-resistant non-contact supply device according to a seventh embodiment of the present invention. The primary circuit and the secondary circuit are water-resistant non-contact supply according to the first to third embodiments. Since it is the same as any one of the apparatuses 10, 32, and 37, only different parts will be described.
FIG. 5 shows a latching jig 60 for attaching the secondary circuit of the water-resistant non-contact supply device to the wall 17. The latching jig 60 is made of an insulating material such as resin and has an opening 61 in the wall 17. Install. Inside the latching jig 60, there is a secondary circuit storage 62, a retaining projection 63, and a mounting flange 64. On the other hand, the secondary side circuit is housed in a rectangular block 65, but has a groove 66 into which the projecting portion 63 is fitted and a part of the groove 66 at the lower portion, and an extension portion 68 that guides the insulated conductor 67 downward. And have. Reference numeral 69 denotes a grip.

Therefore, in this embodiment, the opening 61 is provided in the wall 17 and the latching jig 60 is attached. The primary circuit is wired from outside the bathroom 11.
The block 65 enclosing the secondary circuit is transported with a handle 69, but the handle 69 is not an essential requirement of the present invention. When the block 65 is stored in the storage portion 62, the protrusion 63 and the groove 66 are engaged with each other, the block 65 is fixed at a predetermined position, and the primary side circuit and the secondary side circuit can be magnetically connected.

6 (A) and 6 (B) show a water-resistant non-contact supply device 70 according to an eighth embodiment of the present invention and a method for attaching the primary side circuit 70a and the secondary side circuit 75. The circuit 70a is made of a magnetic material (for example, a ferrite core) having high permeability and a certain degree of strength, and has an extended core portion 71 having a circular cross section or a polygonal cross section in the center, and an annular groove 72 formed in the periphery. A core 72a having an E-shaped central section is used. A primary coil 73 is wound around the annular groove 72, and a resonance coil is wound if necessary. In addition, the outside of the extended core portion 71 is covered with a material (for example, plastic) 74 having an insulating property and made of a nonmagnetic material.

The secondary circuit 75 as a whole is formed as a block and molded with resin, and has a hole 76 into which the extended core portion 71 is fitted in the center. The inner periphery of the hole 76 is covered with an insulating material, and a secondary coil 77 and a resonance coil are wound around the outer side if necessary. The configurations of the primary side circuit 70a and the secondary side circuit 75 are substantially the same as any of the water-resistant non-contact supply devices 10, 32, and 37 according to the first to third embodiments described above. Under the block, an insulated conductor 78 is suspended.

In this embodiment, the primary side circuit 70 a and the secondary side circuit 75 can be magnetically coupled by fitting the extension core portion 71 into the hole 76 of the block of the secondary side circuit 75. Therefore, the primary side circuit 70a and the secondary side circuit 75 can be more closely connected, so that a considerable amount of power can be transmitted even if the resonance circuit is omitted.
An attachment flange 79 is provided around the primary circuit 70a to facilitate attachment to the wall 17.

A water-resistant non-contact supply device 80 according to a ninth embodiment of the present invention shown in FIG. 7 will be described. A core having an E-shaped central section is provided in the primary coil 83 and the secondary coil 84 (and the resonance coil 85). (For example, ferrite cores) 86 and 87 are used. The cores 86 and 87 are arranged so that the magnetic poles face each other with the wall 17 at the center. As a result, the primary coil 83 and the secondary coil 84 can be magnetically coupled more densely. Here, a co-type ferrite core may be used instead of the E-type ferrite core.
In this embodiment, an example in which the resonance coil 85 is arranged in the secondary side circuit is shown, but the primary side circuit or the primary side circuit is used by using a circuit similar to the second and third embodiments. And in the secondary circuit.

Since the mounting flanges 89 and 90 are provided on both sides of the water-resistant non-contact supply device 80, the water-proof non-contact supply device 80 can be fixed to the wall 17 by the latching jig 41 shown in FIG. In addition, by changing the position of the insulated conductor 91, the latching jigs 40 and 42 shown in FIGS. 4A and 4C can be used.

FIG. 8 shows a water-resistant non-contact supply device 93 according to a tenth embodiment of the present invention. The primary coil 94 installed behind or in the wall is rectangular when viewed from the front (or circular or elliptical). Each of the secondary coils 95 and, if necessary, a plurality of secondary circuits 97 having resonant coils can be electromagnetically coupled to supply power. In addition, the structure of the primary side circuit and the secondary side circuit 97 becomes the same as any one of the water-resistant non-contact supply apparatuses 10, 32, and 37 according to the first to third embodiments. Here, the secondary coil 95 may be rectangular, circular, or elliptical when viewed from the front.
In this embodiment, there are three secondary coils, but it may be two or four or more. For fixing to the wall, a multiple latching jig based on the latching jig 41 in FIG. 4B can be used.

The present invention is not limited to the above embodiment, and the present invention is also applied to the case where the first to tenth embodiments are combined.
Moreover, although this invention demonstrated the case where the water-proof non-contact supply apparatus was attached to the bathroom, it is applicable if it is a place using water, such as a washroom, a toilet, and a kitchen.
Although the coated conductor (insulated conductor) is used for connection to the load, a terminal (for example, an insertion terminal) may be used for the secondary circuit.
Moreover, as a load, the battery etc. of the apparatus (for example, lift for disabled people) used at a water use place may be sufficient.
Furthermore, although the output voltage of the secondary circuit is 25 volts or less, it may be 14 volts or less, and in some cases 7 volts or less.

DESCRIPTION OF SYMBOLS 10: Water-proof non-contact supply apparatus, 11: Bathroom, 12: Primary coil, 13: Inverter, 14: Primary side circuit, 15: Secondary side circuit, 16: Power supply object apparatus, 17: Wall, 18: Switch of power supply , 19: resonance coil, 20: secondary coil, 21: rectifier circuit, 22: first control circuit, 23: second control circuit, 25: resonance capacitor, 26: resistance, 27: chopper circuit, 29: hanging Stop jig 32: Water-proof non-contact supply device, 33: Resonance coil, 33a: Resonance capacitor, 34: Primary side circuit, 35: Secondary side circuit, 37: Water-proof non-contact supply device, 40-42: Hook Jig, 44-46: Block, 47: Hook, 48-50: Insulated conductor, 52, 53: Notch, 55, 56: Flange, 60: Hook, 61: Opening, 62: Storage 63: protrusion, 64: mounting flange, 5: block, 66: groove, 67: insulated conductor, 68: extension, 69: grip, 70: water-resistant non-contact supply device, 70a: primary circuit, 71: extension core, 72: annular groove, 72a: Core, 73: Primary coil, 74: Material, 75: Secondary circuit, 76: Hole, 77: Secondary coil, 78: Insulated lead, 79: Mounting flange, 80: Water-resistant non-contact supply device, 83 : Primary coil, 84: Secondary coil, 85: Resonant coil, 86, 87: Core, 89, 90: Mounting flange, 91: Insulated conductor, 93: Water-resistant non-contact supply device, 94: Primary coil, 95: Two Secondary coil, 97: Secondary circuit

Claims (9)

An inverter that receives power supply from a commercial power source, and a primary side circuit that is disposed in a state of being electrically isolated from a water use place where a power supply target device is disposed, including a primary coil that is supplied with high-frequency power from the inverter; A water-resistant non-contact supply device that has a secondary circuit that is disposed in the water use place and receives power from the primary circuit in a non-contact manner,
A resonance circuit having a resonance capacitor and a resonance coil connected in series is provided in the primary side circuit, the secondary side circuit, or the primary side circuit and the secondary side circuit , and the current of the resonance circuit is constant. A water-resistant non-contact supply device , wherein a current suppressing means is provided in series with the resonance circuit so as not to exceed the value . The water-resistant non-contact supply device according to claim 1, wherein a plurality of the secondary circuits can be electromagnetically connected to the primary circuit. 3. The water-resistant non-contact supply device according to claim 1, wherein the secondary side circuit is provided with a rectifier circuit that rectifies the received high frequency to a direct current, and outputs a low voltage direct current of 25 volts or less. A water-resistant non-contact supply device. 4. The water-resistant non-contact supply device according to claim 3, wherein the low voltage direct current is used to charge a battery. 5. The water-resistant non-contact supply device according to claim 1, wherein the power supply to the inverter of the primary circuit is turned on and off by a waterproof switch provided in the water use place. Water-resistant non-contact supply device. The water-resistant non-contact supply device according to any one of claims 1 to 5 , wherein the secondary side circuit is provided with a co-type ferrite core or an E-type ferrite core that concentrates magnetic flux on the primary side circuit. Water-resistant non-contact supply device characterized by The water-resistant non-contact supply device according to any one of claims 1 to 6 , wherein a part or all of the primary side circuit is disposed on a wall or a recess of the water use place. Non-contact supply device. The water-resistant non-contact supply device according to any one of claims 1 to 7 , wherein the secondary circuit is used in a non-earthed state. The water-resistant non-contact supply device according to any one of claims 1 to 8 , wherein the secondary side circuit includes a wall surface, a floor surface, or a floor surface of the water use place via a hooking jig provided in the water use place. A water-resistant non-contact supply device characterized in that it can be mounted on a ceiling surface.

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