JP2021153369A - Wireless power feeding system and precast panel - Google Patents

Abstract

To provide a wireless power feeding system that can stably feed power.SOLUTION: A wireless power feeding system includes power feeding devices 24 arranged in a non-living space in a building, and power receiving devices 22A and 22B, which are arranged in a living space in the building and receive electric power sent by the power feeding devices 24 through a partition P between the non-living space and the living space. In this case, it is preferable that the power feeding device 24 is a microwave power feeding device that diffuses a microwave M along a surface parallel to a main surface of the partition P.SELECTED DRAWING: Figure 7

Description

The present invention relates to a wireless power supply system and a precast panel.

Wireless power supply by microwave is known in a building such as a house (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2019-193423

If the power receiving unit and the power transmitting unit are installed so that microwaves cross the room using the system described in Patent Document 1, the power supply efficiency is affected by the objects in the room, and stable power supply cannot be performed. .. Especially when moving objects such as people cross the power transmission path, they tend to become unstable.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a wireless power supply system capable of stably supplying power.

The wireless power supply system according to one aspect of the present invention is a power supply device arranged in a non-living space in a building and a power supply device arranged in a living space in the building through a partition between the non-living space and the living space. It is equipped with a power receiving device that receives the power sent by.

It is a vertical sectional view of a building to which a wireless power supply system is applied. It is a perspective view which shows an example of a non-living space. It is a perspective view which shows an example of a non-living space. It is a perspective view which shows an example of a non-living space. The schematic diagram of the power feeding device is shown. The schematic diagram of the power feeding device is shown. It is a schematic diagram of a partition. It is a schematic perspective view of a living space. It is sectional drawing of a non-living space. It is sectional drawing of a non-living space. Shows a microwave reflector. An example of the power receiving device is shown. An example of the power receiving device is shown. An example of the power receiving device is shown. An example of the power receiving device is shown. It is the schematic of the further embodiment. It is the schematic of the further embodiment.

The wireless power supply system according to the embodiment will be described. FIG. 1 is a vertical sectional view of a building to which a wireless power supply system is applied. The building 100 may be used for any purpose such as a residential building, a commercial facility, and an office building. The building forms a closed space with an outer wall portion 12, a roof portion 14, a floor portion 16, and the like. A plurality of rooms R1 to R4 and a passage H are formed in the building 100. The illustrated example shows a double-decker building 100 with four rooms and one aisle. The space in the building 100 is classified into a living space S1 in which a person is active and a non-living space S2 in which a person is not intended to be active.

A "living space" is a space inside a building (including residential and non-residential) designed assuming that people will be active in that space, and is a living room, bathroom, toilet, kitchen, conference room, etc. Includes exhibition space, multipurpose space, etc. The "non-living space" is a space in a building designed without assuming that humans are active in the space, and is a space other than the living space in the building. The non-living space includes the space between the upper floor and the lower floor, the space between the living room and the living room, the space inside the wall partitioning these spaces, and the living space and the non-living space include the wall, ceiling, and floor. However, the partition is not limited to the one that completely partitions the entire space, and may be the one that partially divides the space. Examples of the partition that partially divides the space include an inspection box provided in the toilet space, a partition that divides the space, and a lintel.

The wireless power feeding system 20 includes a power receiving device 22 installed in the living space S1 and a power feeding device 24 (corresponding to a microwave power feeding device) installed in the non-living space S2. The power feeding device 24 radiates microwaves in the non-living space S2. The power receiving device 22 receives the microwave radiated in the non-living space S2 and converts the microwave into electric power.

In the example of FIG. 1, rooms R1 to R4, passage H, and the like are included in the living space. In a large-scale building, the living space S1 also includes passages and rooms where only some people are allowed to work for maintenance and cleaning of the building. The non-living space S2 is a space provided between adjacent rooms and between the adjacent rooms and the aisle, and is not accessible to people in the normal use of the building. An example of the non-living space S2 will be described below.

2, FIG. 3 and FIG. 4 are perspective views showing an example of a non-living space.

Specifically, FIG. 2 shows a ventilation space formed between a pair of walls 30 and 38 facing each other. In FIG. 2, the power feeding device 24 is arranged in the ventilation space. One wall 30 is a wall on the indoor side of a wooden structure, and is formed by stacking a moisture-proof sheet 32, an indoor base 34, and an interior material 36. The power receiving device 22 is attached to the surface of the interior material 36. When one wall has a reinforced concrete structure, the power feeding device may be arranged in the air layer between the concrete wall and the interior material. When the interior material is used, the power receiving device 22 and the power feeding device 24 are arranged so as to sandwich at least the interior material 36. The other wall 38 is an outer wall facing the outside, and is formed by stacking a plywood 40, a tarpaulin 42, and an outer wall material 44. The other wall may be an interior wall facing an adjacent room. When an interior material such as a bare concrete wall surface is not used as the wall, at least the surface of the power receiving device 22 may be exposed on the living space S1 side, and the power feeding device 24 may be provided in the non-living space S2.

FIG. 3 shows a space in which a pillar 54 is arranged between a pair of walls 50 and 52 facing each other. In FIG. 3, the power feeding device 24 is arranged in the space where the pillar 54 is arranged, and the power receiving device 22 is arranged on the indoor side of one wall 52. FIG. 4 shows a space in which a pillar 54 and a heat insulating material 56 are arranged between a pair of walls 50 and 52 facing each other. In FIG. 4, the power feeding device 24 is arranged in the space where the pillar 54 and the heat insulating material 56 are arranged, and the power receiving device 22 is arranged on the indoor side of one wall 52. If the pillar 54 is not a conductive material such as wood, the influence of the pillar 54 on the power supply is small. Since the space for accommodating the structure of the building is not a space for the purpose of human activity, it is included in the non-living space, and the power feeding device 24 can be arranged.

5 and 6 show a schematic view of the power feeding device. 5 and 6 are views of the power feeding device 24 viewed from directions orthogonal to each other. The microwave M radiated from the power feeding device 24 has a small diffusivity along the arrangement direction of the plurality of power transmission antennas 60 as shown in FIG. On the other hand, as shown in FIG. 5, the diffusivity in the direction orthogonal to the arrangement direction of the microwave M power transmission antenna 60 is large. The power feeding device 24 is arranged so that the power transmission antenna 60 is arranged along a plane perpendicular to the main plane of the partition P. As a result, the microwave M is widely diffused along the main surface of the partition P.

FIG. 7 is a schematic view of the partition. As shown in FIG. 7, the power feeding device 24 is arranged near the corner of the partition P. When the size of the partition P is large, the power feeding device 24 may be arranged near two corners on the diagonal line of the partition P having a rectangular main surface, or near all the corners. By arranging the power feeding device 24 near the corner of the partition P, the microwave M can be delivered to a wider range of the main surface. As a result, power can be supplied to the power receiving devices 22A near the center of the partition P and the power receiving devices 22B near the ends of the partition P. The power feeding device 24 is preferably arranged so that the center line C of the diffusion angle of the microwave M is 45 degrees with respect to the side of the main surface of the partition P.

FIG. 8 is a schematic perspective view of the living space. In FIG. 8, power feeding devices 24A and 24B are arranged near the corners of the ceiling and the corners of the wall, respectively. The power supply device 24A located near the corner of the ceiling is directed so that the microwave M is more horizontally diffused along the ceiling. The power supply device 24B, located near the corner (lower corner) of the wall, is directed so that the microwave M is more diffused vertically along the wall.

9 and 10 are cross-sectional views of the non-living space. More specifically, FIG. 9 is an enlarged view of a bent portion of the non-living space S. As shown in FIG. 9, the microwave reflecting portion 70 can be arranged at a position where the non-living space bends by 90 degrees. A metal plate can be used as the microwave reflecting unit 70. Further, as shown in FIG. 10, the microwave reflecting portion 72 may be arranged in the T-shaped portion in which the bent portions are combined. In this case, the microwave reflecting unit 72 transmits a part of the microwave M radiated from the left side of FIG. 10 and reflects the remaining microwave M toward the lower side of the figure. By using the microwave reflecting units 70 and 72, the traveling direction of the microwave M can be changed. A microwave reflecting portion may be arranged at a portion curved with a predetermined curvature.

FIG. 11 shows a microwave reflecting unit. FIG. 11 is a microwave reflecting unit used in the example of FIG. The microwave reflecting portion 72 is a metal plate in which a plurality of holes 74 are formed. The microwave reflecting unit 72 transmits a part of the microwave M through the hole 74 and reflects a part of the microwave M that hits the surface. By using such a microwave reflecting unit 72, the microwave M can be appropriately distributed according to the shape of the non-living space S.

12 to 15 show an example of the power receiving device. 12 and 13 show an operation panel of a warm water washing toilet seat as a power receiving device. The operation panel 80 includes an operation unit 82, a circuit board 84 that supplies electric power to the operation unit 82, and a power receiving antenna 86. The operation panel 80 is attached to the surface of the wall 90 on the living space S1 side using screws 88. The power receiving antenna 86 penetrates the wall 90 to which the operation panel 80 is attached and extends to the non-living space S2. The operation panel 80 receives the microwave M using the power receiving antenna 86. The microwave M is converted into electric power and supplied to the circuit board 84. The operation panel 80 is driven based on the electric power supplied to the circuit board 84.

FIG. 14 shows a charging device for a remote controller for home appliances as a power receiving device. The charging device 110 includes a holding unit 114 for holding the remote controller 112, a charging unit 116 for charging the remote controller 112, and a power receiving antenna 118. The charging device 110 is attached to the surface of the wall on the living space S1 side using screws 120. The power receiving antenna 118 penetrates the wall 122 to which the charging device 110 is attached and extends to the non-living space S2. The charging device 110 receives the microwave M using the power receiving antenna 118. The microwave M is converted into electric power and supplied to the charging unit 116. The charging device 110 charges the remote controller 112 held by the holding unit 114 based on the electric power supplied to the charging unit 116.

FIG. 15 shows a fire alarm 130 and an environmental sensor 132 as power receiving devices. The environment sensor 132 includes a humidity sensor, a temperature sensor, an illuminance sensor, and a motion sensor. The fire alarm 130 and the environmental sensor 132 each have a power receiving antenna 136 that penetrates the ceiling 134 and extends to the non-living space S2. The fire alarm 130 is attached to the surface of the ceiling on the living space S1 side using screws 138. Further, the screw 138 can also function as a power receiving antenna 136. When the ceiling 134 is made of a material that does not transmit microwaves, such as metal, the screw 138 needs to penetrate the ceiling 134 in order for the screw 138 to function as the power receiving antenna 136. On the other hand, when the ceiling 134 is made of a material that transmits microwaves (for example, wood, plaster, etc., but not limited to these), the screw 138 does not necessarily have to penetrate the ceiling 134. Even if the target to which the power receiving antenna is attached is not the ceiling 134 but the floor or wall (whether direct or indirect), the screw 138 can be made to function as the power receiving antenna in the same manner. The relationship between penetration and non-penetration with the mounting object (floor or wall) is the same as when mounting on the ceiling. The environment sensor 132 is fitted in a hole provided in the ceiling 134. The fire alarm 130 and the environmental sensor 132 also receive the microwave M radiated to the non-living space S2 and are driven by the electric power based on the microwave M. By using a wireless power supply system, it is possible to simplify the wiring work of power receiving devices that are retrofitted after the building is completed, such as fire alarms and environmental sensors.

As described above, according to the wireless power supply system of the embodiment, microwaves can be transmitted via the non-living space. This makes it possible to prevent moving objects such as humans from crossing the microwave power transmission path. Further, once the power feeding device 24 is installed, the power receiving device 22 can be added without performing complicated wiring processing. In this case, a device capable of receiving power from the power feeding device 24 may be prepared and fixed to the wall surface of the living space S1. When the power receiving device 22 is provided with a power receiving antenna, a hole may be formed in the wall and the power receiving antenna may be extended to the non-living space S2.

16 and 17 are schematic views showing a further embodiment. In this embodiment, a wireless power supply system is applied to a male toilet in a public facility. The men's toilet to which the wireless power supply system 150 is applied is provided with a plurality of toilet devices 154 fixed to the wall surface of the inspection box 152. In this example, the interior of the toilet corresponds to a living space, and the space inside the inspection box 152 corresponds to a non-living space.

A power supply device 156 of the wireless power supply system is arranged in the wall. The power feeding device 156 is arranged so that the microwave M spreads in the vertical direction and the microwave M narrows in the depth direction of the wall. An aluminum box 158 may be arranged in the inspection box 152. The aluminum box 158 is provided along the inner wall of the inspection box 152, and suppresses the microwave M radiated from the power feeding device 156 from leaking to the outside of the inspection box 152.

The toilet device 154 includes an antenna 160 that receives the microwave M, and an overflow sensor 162 (corresponding to a power receiving device) built in the toilet device 154. The antenna 160 is electrically connected to the overflow sensor 162 and extends through the inside of the aluminum box 158. The overflow sensor 162 converts the microwave M received by the antenna 160 into electric power and uses it as electric power. Further, in recent years, an increasing number of toilet bowl devices 154 are equipped with an automatic cleaning function that detects a usage state by a sensor, determines whether or not to flush the cleaning water, and flushes the cleaning water without any user operation. Needless to say, the power supply system of the present embodiment can be suitably used when supplying electric power to the sensor unit, the determination unit, the cleaning water operating unit, and the like for exerting such an automatic cleaning function.

In addition, the wireless power supply system can be suitably applied when it is necessary to supply power to an automatic faucet of a plurality of hand washing devices or a plurality of automatic soap discharge devices, for example, a plurality of automatic faucets such as a public facility toilet. It can be suitably used even in a place where a plurality of automatic soap discharge devices are used. In this case, the power supply device of the wireless power supply system may be arranged inside a hand-washing bowl or a wash basin, and a power receiving device may be provided in an automatic faucet or an automatic soap discharge device. In recent years, the number of situations in which both an automatic faucet and an automatic soap discharge device are installed in public facility toilets is increasing, and the power supply system according to the present disclosure can be suitably used in such situations as well.

The present invention is not limited to the above-described embodiment, and each configuration of the embodiment can be appropriately changed without departing from the spirit of the present invention.

The power supply device and the partition may be integrated. In this case, a power feeding device can be attached to the corner of the partition and used as one precast panel. In this case, the precast panel has a power feeding device fixed to the corner of the partition as shown in FIG. By preparing a plurality of such precast panels and assembling them into a box shape, the man-hours for assembling a building equipped with a wireless power supply system can be reduced.

The power receiving device may be connected to an additional power feeding device. That is, the power receiving device and the additional power feeding device can be relay points for wireless power feeding.

S1 living space, S2 non-living space, 20 wireless power supply system, 22, 24, 70, 72 microwave reflector, 80 operation panel, 100 building, 110 charging device, 112 remote control, 130 fire alarm, 132 environmental sensor

Claims (10)

A power supply device placed in a non-living space in the building,
A wireless power supply system that is arranged in a living space in the building and includes a power receiving device that receives electric power transmitted by the power feeding device through a partition between the non-living space and the living space. The wireless power feeding system according to claim 1, wherein the power feeding device is a microwave power feeding device that diffuses microwaves along a plane parallel to a main surface of a partition. The wireless power feeding system according to claim 2, wherein the microwave power feeding device is arranged near the corner of the partition. The wireless power feeding system according to claim 2 or 3, further comprising a microwave reflecting portion at a bent portion of the non-living space. The wireless power feeding system according to claim 4, wherein the microwave reflecting unit transmits a part of microwaves. The wireless power feeding system according to any one of claims 1 to 5, wherein the power receiving device includes an antenna extending to the non-living space. The wireless power supply system according to any one of claims 1 to 6, wherein the power receiving device is an environmental sensor. The wireless power supply system according to any one of claims 1 to 6, wherein the power receiving device is a fire alarm, an operation panel of a warm water washing toilet seat, or a charging device for a remote controller for home appliances. The wireless power supply system according to any one of claims 1 to 6, wherein the power receiving device is a sensor of an automatic faucet of a hand washing device, an automatic soap discharge device, or a toilet bowl device. With a rectangular partition,
A precast panel attached near at least one corner of the partition and comprising a microwave feeding device that irradiates microwaves along a surface parallel to the main surface of the partition.

Images