JP7403063B2 - Ventilation equipment and ventilation systems - Google Patents

Description

The present invention relates to a ventilation device and a ventilation system, and more particularly to a ventilation device used for indoor ventilation, and a ventilation system equipped with the same.

Patent Document 1 describes a ventilation device installed on the ceiling of a building or the like. The ventilation device described in Patent Document 1 includes a box-shaped casing having an inlet on the bottom and an outlet on one side, and a blowing section that guides air from the inlet to the outlet. The material of the housing is metal.

JP2019-158325A

In the field of ventilation equipment, there has been a desire for improved usability.

An object of the present disclosure is to provide a ventilation device and a ventilation system that are capable of wireless communication and that can improve communication performance.

A ventilation device according to one aspect of the present disclosure includes a main body case, a blower unit, a wireless communication section, and a control section. The main body case is made of metal. The main body case has a rectangular box shape with a first opening on the bottom surface and a second opening on the peripheral wall or the top wall. The blower unit is arranged within the main body case. The air blowing unit sends air between the first opening and the second opening. The wireless communication unit has an antenna and performs wireless communication using radio waves of a predetermined wavelength as a medium. The control section is connected to the wireless communication section. The control section controls the blower unit according to a signal received by the wireless communication section. When the main body case is viewed from below, the antenna is located within a rectangular area defined by a first point, a second point, a third point, and a fourth point, and 1 away from the periphery of the opening. The first point is perpendicular to a first straight line including a linear first peripheral edge along a first direction among the peripheral edges of the first opening, and a first straight line including a linear first peripheral edge along the first direction among the peripheral edges of the first opening. It is an intersection with a second straight line including a straight second peripheral edge along the second direction. The second point is a point separated from the first point by a distance of 1/2 of the predetermined wavelength in the first direction. The third point is a point separated from the second point by a distance of 1/2 of the predetermined wavelength in the second direction. The fourth point is a point separated from the first point by a distance of 1/2 of the predetermined wavelength in the second direction. The blower unit includes a resin fan case having a third opening connected to the first opening and a fourth opening connected to the second opening, a resin fan disposed in the fan case, and a rotating fan case. and a motor having a shaft and rotating the fan together with the rotating shaft. The blower unit is a centrifugal fan, and when the main body case is viewed from below, the rotating shaft of the motor is located at a first corner portion of the periphery of the first opening that includes the first point. and a second corner portion diagonal to the first corner portion.

A ventilation system according to one aspect of the present disclosure includes the ventilation device and equipment. The device performs wireless communication with the wireless communication unit of the ventilation device.

The ventilator and ventilation system of the present disclosure are capable of wireless communication and can improve communication performance.

FIG. 1 is a perspective view of a ventilation device according to an embodiment. FIG. 2 is a perspective view of the ventilation device shown above with the cover removed. FIG. 3 is a bottom view of the ventilation device with the cover removed. FIG. 4 is a partially cutaway side view of the essential parts of the ventilation system. FIG. 5 is a block diagram of the ventilation device same as above. FIG. 6 is a configuration diagram of a ventilation system including the same ventilation device. FIG. 7 is a characteristic diagram in the XY direction of the wireless communication unit in the ventilation device. FIG. 8 is a characteristic diagram in the YZ direction of the wireless communication unit in the ventilation device. FIG. 9 is a characteristic diagram in the XZ direction of the wireless communication unit in the ventilation device. FIG. 10 is a bottom view of a ventilator according to a comparative example with the cover removed. FIG. 11 is a characteristic diagram in the XY direction of the wireless communication unit in the ventilation device. FIG. 12 is a characteristic diagram in the YZ direction of the wireless communication unit in the ventilation device. FIG. 13 is a characteristic diagram in the XZ direction of the wireless communication unit in the ventilation device.

1 to 4 and 10 described in the following embodiments are schematic diagrams, and the size and thickness ratios of each component in the diagrams do not necessarily reflect the actual dimensional ratios. is not limited.

(Embodiment)
Hereinafter, a ventilation device 1 and a ventilation system 100 including the same according to an embodiment will be described based on FIGS. 1 to 6.

(1) Overview The ventilation device 1 is attached to the ceiling of a bathroom, toilet room, etc. of a residence, for example. When the ventilation system 1 is installed in a building (single-family house, apartment complex, office building, commercial facility, store, factory, hospital, art museum, museum, play facility, theme park, airport, railway station, dome stadium, hotel, etc.) However, the present invention is not limited to this, and may be provided in a moving object such as a train or a ship. The ventilation device 1 ventilates the room by exhausting indoor air to the outside.

As shown in FIGS. 1 to 4, the ventilation device 1 includes a main body case 2, a blower unit 3, a wireless communication section 7, and a control section 8. The main body case 2 is made of metal. The main body case 2 has a rectangular box shape with a first opening 26 on the lower surface, and a second opening 28 (see FIG. 4) on the peripheral wall 25. The blower unit 3 is arranged inside the main body case 2. The blower unit 3 sends air between the first opening 26 and the second opening 28 . The wireless communication unit 7 has an antenna 71 and performs wireless communication using radio waves of a predetermined wavelength as a medium. The control section 8 is connected to the wireless communication section 7. The control unit 8 controls the blower unit 3 according to the signal received by the wireless communication unit 7.

Further, as shown in FIG. 6, the ventilation system 100 includes a ventilation device 1 and a main unit 101 that is a device. Base device 101 performs wireless communication with wireless communication section 7 of ventilation device 1 . Ventilation system 100 may further include a repeater 102. In this case, the ventilation device 1 also performs wireless communication with the repeater 102. Further, the ventilation system 100 may further include an information terminal 103. In this case, the information terminal 103 performs wireless communication with the base device 101. The information terminal 103 is, for example, a mobile terminal carried by a user of the ventilation apparatus 1, and is, for example, a communication terminal such as a smartphone. Further, the information terminal 103 is not limited to a smartphone, and may be, for example, a tablet-type mobile terminal or a desktop-type computer.

(2) Details As described above, the ventilation device 1 includes the main body case 2, the blower unit 3, the wireless communication section 7, and the control section 8. Further, the ventilation device 1 further includes a duct connection part 19. Further, the ventilation device 1 further includes a cover 10.

The main body case 2 has a rectangular box shape with a first opening 26 on the lower surface, and includes an upper wall 20, a peripheral wall 25, and a flange 27. The upper wall 20 has a rectangular plate shape. Here, the upper wall 20 has a square shape, but is not limited to this and may have a rectangular shape. The peripheral wall 25 protrudes downward from the entire outer peripheral edge of the upper wall 20. The peripheral wall 25 has a rectangular frame shape. The peripheral wall 25 includes a first side wall 21 , a second side wall 22 , a third side wall 23 , and a fourth side wall 24 . The first opening 26 is a rectangular (here, square-shaped) opening surrounded by the lower end of the first side wall 21, the lower end of the second side wall 22, the lower end of the third side wall 23, and the lower end of the fourth side wall 24. be. The second opening 28 is formed in the first side wall 21 of the peripheral wall 25 . Here, the second opening 28 is formed in a portion of the peripheral wall 25 on one end side (the right side in FIG. 3) of the first side wall 21 in the circumferential direction. The flange portion 27 extends along the entire circumference of the lower end of the peripheral wall 25 to the side of the lower end.

When constructing the ventilation system 1, for example, the main body case 2 is inserted from below into the opening 201 provided in the ceiling material 200 (see FIG. 4), and the flange 27 of the main body case 2 is brought into contact with the lower surface of the ceiling material 200. and fix it to the periphery of the opening 201 in the ceiling material 200. Therefore, most of the main body case 2 protrudes above the ceiling material 200.

The blower unit 3 includes a fan 4, a fan case 5, and a motor 6. The fan case 5 is made of resin. The fan case 5 has a third opening 56 connected to the first opening 26 and a fourth opening 58 connected to the second opening 28. Fan 4 is arranged within fan case 5. The motor 6 has a rotating shaft 61 and rotates the fan 4 together with the rotating shaft 61.

The material of the fan 4 is resin (eg, polypropylene). The fan 4 is a centrifugal fan (sirocco fan).

The material of the fan case 5 is resin (eg, polypropylene). The fan case 5 is attached to the main body case 2. The fan case 5 has a main body portion 51 and an extension portion 52. The main body portion 51 has the above-mentioned third opening 56 on the lower surface. The outer peripheral shape of the main body portion 51 is approximately circular. The third opening 56 has a circular opening shape. The center of the third opening 56 is eccentric from the center of the main body portion 51. The main body portion 51 has a first internal space that accommodates the fan 4 and the motor 6. The extension portion 52 extends from the main body portion 51 toward the first side wall 21 . An end portion of the extension portion 52 on the side opposite to the main body portion 51 side is attached to a peripheral portion of the second opening 28 in the first side wall 21 of the main body case 2 . The extension part 52 has a second internal space 521 (see FIG. 4) that is connected to the first internal space. The blower unit 3 has a flow path including a first internal space and a second internal space, the third opening 56 constitutes an inlet, and the fourth opening 58 constitutes an outlet.

The blower unit 3 blows air sucked in through the first opening 26 and the third opening 56 of the main body case 2 from the fourth opening 58 to the second opening 28 of the main body case 2 .

In the ventilation device 1, the duct connection portion 19 is arranged on the outer surface of the first side wall 21. The duct connecting portion 19 has a cylindrical shape and has an internal space connected to the second opening 28 . The duct connection part 19 is made of metal, for example. A duct (for example, an exhaust duct) is connected to the duct connection portion 19 .

In the ventilation device 1, the cover 10 covers the first opening 26 of the main body case 2. The cover 10 includes a cover main body 11 having a vent hole 16, and a rectangular plate-shaped central portion 17 and a louver 15 disposed in the vent hole 16 of the cover main body 11. In the cover 10, the cover body 11 covers the flange 27 of the main body case 2 and is attached to the flange 27 of the main body case 2. Note that the cover 10 may also have the louver 15 disposed in the central portion 17.

In the ventilation system 1, the ventilation port 16 of the cover 10, the first opening 26 of the main body case 2, the third opening 56 of the ventilation unit 3, the fourth opening 58 of the ventilation unit 3, the second opening 28 of the main body case 2, and the duct connection. A flow path passing through section 19 is formed.

The control unit 8 of the ventilation device 1 can operate, stop, and change the air volume of the blower unit 3 according to the content of the signal from the base unit 101 received by the wireless communication unit 7. The ventilation device 1 can change the air volume in multiple stages (here, two stages), and can operate in a normal operation mode where the air volume is relatively small and a strong operation mode where the air volume is relatively large. That is, the operation modes of the ventilation system 1 include a normal operation mode and a strong operation mode.

The control section 8 is electrically connected to the wireless communication section 7. Further, the control section 8 is electrically connected to the motor 6 of the blower unit 3. The control section 8 controls the blower unit 3 according to the signal received from the base unit 101 in the wireless communication section 7 . The ventilation device 1 includes a power supply circuit that is connected to an external power source and supplies voltage to the control unit 8.

For example, if the signal from the base unit 101 received by the wireless communication unit 7 is a signal instructing the start of operation of the ventilation device 1, the control unit 8 operates the motor 6 of the ventilation unit 3. When the ventilation system 1 is capable of operating in a plurality of operation modes (for example, strong operation mode, medium operation mode, and weak operation mode), the control unit 8 controls the base unit 101 received by the wireless communication unit 7. If the signal from the air blower unit 3 is a signal indicating a request to transmit information on the operating state of the air blower unit 3, the information on the operating state of the air blower unit 3 is transmitted to the base unit 101 by wireless communication. Further, if the signal received from the base unit 101 by the wireless communication unit 7 is a signal instructing to stop operation of the ventilation device 1, the control unit 8 stops the motor 6 of the blower unit 3.

The operation of the control unit 8 is set, for example, by the user operating the information terminal 103. The wireless communication unit included in the information terminal 103 is configured via the repeater 102, the base unit 101, and the wireless communication unit 7. In the ventilation system 100, the communication method of the wireless communication unit of the information terminal 103 is Wi-Fi (registered trademark), and the repeater 102 is a router compatible with Wi-Fi (registered trademark). The communication method between the information terminal 103 and the repeater 102 is not limited to Wi-Fi (registered trademark), but may also be a communication method compliant with Bluetooth (registered trademark) Low Energy or Ethernet (registered trademark) standards, for example. . Furthermore, the repeater 102 is not limited to a router compatible with Wi-Fi (registered trademark), as long as it is capable of wireless communication with the information terminal 103. The communication method between the repeater 102 and the base device 101 may be a wireless communication method or a wired communication method.

The control unit 8 is composed of, for example, a microcomputer having a processor and a memory. That is, the control unit 8 is realized by a computer system having a processor and a memory. The computer system functions as the control unit 8 by the processor executing an appropriate program. The program may be pre-recorded in a memory, or may be provided via a telecommunications line such as the Internet, or recorded on a non-transitory recording medium such as a memory card.

The wireless communication unit 7 includes a printed circuit board 70, an antenna 71, an RFIC (Radio Frequency Integrated Circuit) 72, and a matching circuit.

A matching circuit is provided between the antenna 71 and the RFIC 72. The outer peripheral shape of the printed circuit board 70 is rectangular when viewed from the thickness direction of the printed circuit board 70. The printed circuit board 70 has a first main surface (front surface) and a second main surface (back surface) that intersect in the thickness direction of the printed circuit board 70. The antenna 71 is, for example, a meander-shaped radiation conductor (conductor pattern) formed at one end in the longitudinal direction of the printed circuit board 70 on the first main surface of the printed circuit board 70 . The antenna 71 is separated from the outer periphery of the printed circuit board 70. The RFIC 72 is mounted on the first main surface of the printed circuit board 70. The matching circuit is a circuit for matching the impedance on the antenna 71 side and the impedance on the RFIC 72 side.

The wireless communication section 7 is arranged inside the main body case 2. The layout of the wireless communication section 7 inside the main body case 2 will be described later.

The wireless communication unit 7 further includes a first connector for external connection arranged on the second main surface of the printed circuit board 70. The wireless communication unit 7 further includes a module cover 75 that houses a wireless communication module including a printed circuit board 70, an antenna 71, and an RFIC 72. The material of the module cover 75 is resin. Note that in FIG. 3, the module cover 75 is partially cut away. Further, in FIG. 3, illustration of the resist layer covering the antenna 71 on the printed circuit board 70 is omitted.

The wireless communication unit 7 performs wireless communication using radio waves of a predetermined wavelength as a medium. The communication method of the wireless communication unit 7 is, for example, Zigbee (registered trademark), which is a wireless communication standard. The wireless communication unit 7 uses, for example, any one channel out of 16 channels in the 2.4 GHz frequency band as the predetermined wavelength. Therefore, in the wireless communication unit 7, for example, when using the lowest center frequency of 2.405 GHz among the 16 channels, the predetermined wavelength is about 125 mm, and when using the highest center frequency of 2.48 GHz, The predetermined wavelength is approximately 120 mm. The wireless communication standard of the wireless communication unit 7 is not limited to Zigbee (registered trademark), but also Wi-Fi (registered trademark), Bluetooth (registered trademark), Bluetooth (registered trademark) Low Energy, and specified low power wireless. Good too.

The ventilation device 1 includes a circuit module including a control unit 8. The circuit module includes a control unit 8, a second connector, and a motherboard on which the control unit 8 and the second connector are mounted. In the ventilation apparatus 1, the wireless communication section 7 is electrically connected to the control section 8 by connecting the first connector of the wireless communication section 7 to the second connector of the circuit module.

The ventilation device 1 further includes a holding member 9 holding a circuit module. The holding member 9 holds the control section 8 and the wireless communication section 7. The holding member 9 includes a body made of synthetic resin and a cover made of synthetic resin, and is constructed by combining the body and the cover with the circuit module housed in the space surrounded by the body and the cover. There is. Here, the second connector is exposed. The holding member 9 is attached to the fan case 5 of the blower unit 3 on the lower side of the fan case 5. Here, the holding member 9 is L-shaped when viewed from the bottom of the main body case 2. The holding member 9 is attached to the extension portion 52 of the fan case 5 of the blower unit 3 with a plurality of screws 95 and the like.

(3) Layout of the wireless communication section within the main body case The wireless communication section 7 is arranged within the main body case 2 as described above. Here, when the main body case 2 is viewed from below, the antenna 71 is connected to a first point P1, a second point P2, a third point P3, and a fourth point. It is located within the rectangular area A1 defined by P4 and is away from the periphery 260 of the first opening 26 in the main body case 2.

The first point P1 is connected to a first straight line L1 including a linear first peripheral edge 261 along the first direction D1 among the peripheral edge 260 of the first opening 26 and a first straight line L1 including a linear first peripheral edge 261 along the first direction D1 among the peripheral edge 260 of the first opening 26. It is an intersection with a second straight line L2 including a linear second peripheral edge 262 along a second direction D2 orthogonal to the second direction D2.

The second point P2 is a point separated from the first point P1 by a distance of 1/2 of the above-mentioned predetermined wavelength in the first direction D1. When the wireless communication unit 7 performs wireless communication using 2.4 GHz band radio waves as a medium as described above, the predetermined wavelength is 120 mm or more and 125 mm or less. In the ventilation device 1 according to the embodiment, the distance of 1/2 of the predetermined wavelength is set to 60 mm, but is not limited to this, and may be set to 62.5 mm, for example.

The third point P3 is a point separated by a distance of 1/2 of the predetermined wavelength from the second point P2 in the second direction D2.

The fourth point P4 is a point separated by a distance of 1/2 of the predetermined wavelength from the first point P1 in the second direction D2.

Therefore, in the ventilation device 1 according to the embodiment, the rectangular area A1 is a square area with each side having a length of 60 mm.

In the ventilation device 1 according to the embodiment, the wireless communication unit 7 is arranged such that the first main surface of the printed circuit board 70 is on the lower side and the second main surface is on the upper side.

Furthermore, in the ventilation device 1 according to the embodiment, when the main body case 2 is viewed from below, the rectangular area A1 does not overlap with the main body part 51 of the fan case 5 of the ventilation unit 3, and is a part of the extension part 52. overlapping parts.

Here, in the ventilation device 1 according to the embodiment, when the main body case 2 is viewed from below, the rotation shaft 61 of the motor 6 is located at the first corner including the first point P1 of the peripheral edge 260 of the first opening 26. It is located closer to the second corner C2 than the center E3 of the diagonal line L3 connecting the portion C1 and the second corner C2, which is diagonal to the first corner C1. Thereby, in the ventilation device 1, the fan case 5 of the ventilation unit 3 is housed in the main body case 2 in a compact manner. Here, regarding the installation space of the fan case 5 of the blower unit 3 in the main body case 2, the installation space of the main body part 51 housing the fan 4 is wider than the installation space of the extension part 52. Note that the center E3 of the diagonal line L3 is the intersection of the diagonal line L3 with the perpendicular bisector.

In the ventilation device 1, when the main body case 2 is viewed from below, the holding member 9 is located closer to the first corner portion C1 than the center E3 of the diagonal line L3. Thereby, in the ventilation device 1, when the main body case 2 is viewed from below, the wireless communication section 7 is located between the center E3 of the diagonal line L3 and the first corner C1. More specifically, when the main body case 2 is viewed from below, the wireless communication section 7 is located between the main body section 51 of the fan case 5 and the first corner section C1, and partially overlaps the extension section 52. are doing. In the ventilation device 1, when the main body case 2 is viewed from below, the holding member 9 is arranged along the first circumferential edge 261 and the second circumferential edge 262 of the circumferential edge 260 of the first opening 26 of the main body case 2. There is. In the ventilation device 1, when the main body case 2 is viewed from below, the holding member 9 does not overlap the cover main body 11 and the central portion 17 of the cover 10.

The wireless communication section 7 faces the first opening 26 on the bottom surface of the main body case 2. Therefore, the wireless communication unit 7 faces the inner surface of the first side wall 21 of the main body case 2 in the second direction D2, and faces the inner surface of the second side wall 22 of the main body case 2 in the first direction D1. The height H1 (see FIG. 4) from the virtual plane including the bottom surface of the main body case 2 to the wireless communication section 7 is, for example, 1/4 of the above-mentioned predetermined wavelength, but is not limited to this. The height of 1/4 of the predetermined wavelength is, for example, 30 mm.

(4) Communication performance of the wireless communication unit in the ventilation system Below, in order to explain the communication performance of the wireless communication unit 7 of the ventilation system 1 according to the embodiment, the antenna 71 of the wireless communication unit 7 in FIG. As shown in the lower left, right-handed orthogonal coordinates are defined that have three axes, the X-axis, Y-axis, and Z-axis, which are orthogonal to each other. The origin of the orthogonal coordinates is the tip of the antenna 71. In FIG. 3, the direction along the top of FIG. 3 in the second direction D2 is the positive direction of the X-axis, and the direction along the right direction in FIG. 3 among the first direction D1 is the positive direction of the Y-axis, The direction along the back of the paper in FIG. 3 is defined as the positive direction of the Z-axis. The X-axis, Y-axis, and Z-axis are all virtual axes, and the arrows indicating "X,""Y," and "Z" in FIG. 3 are only shown for explanation. None of them involve substance. Further, the positive direction of the Z-axis corresponds to the upward direction when the ventilation device 1 is installed, and the negative direction of the Z-axis corresponds to the downward direction when the ventilation device 1 is installed. The positive direction of the X-axis and the positive direction of the Y-axis are not intended to limit the direction in which the ventilation device 1 is installed.

Below, before explaining the communication performance of the wireless communication unit 7 of the ventilation apparatus 1 according to the embodiment with reference to FIGS. 7 to 9, a ventilation apparatus 1a according to a comparative example will be explained based on FIG. 10. Regarding the ventilation device 1a according to the comparative example, the same components as those in the ventilation device 1 according to the embodiment are given the same reference numerals, and the description thereof will be omitted as appropriate.

The ventilation device 1a according to the comparative example differs from the ventilation device 1 according to the embodiment in that the wireless communication section 7 is arranged outside the rectangular area A1 when viewed from the bottom of the main body case 2. In order to explain the communication performance of the wireless communication unit 7 of the ventilation apparatus 1a according to the comparative example, the same orthogonal coordinates as the orthogonal coordinates at the lower left of FIG. 3 are also shown at the lower left of FIG. 11 to 13 show the communication performance of the wireless communication unit 7 of the ventilation apparatus 1a according to the comparative example.

Each of FIGS. 7 and 11 shows communication characteristics in a plane including the X-axis and the Y-axis. Moreover, each of FIGS. 8 and 12 shows communication characteristics in a plane including the Y-axis and the Z-axis. Each of FIGS. 9 and 13 shows communication characteristics in a plane including the X-axis and the Z-axis. In each of FIGS. 7 to 9 and 11 to 13, the thick solid lines indicate the characteristics of vertical polarization, and the broken lines indicate the characteristics of horizontal polarization.

From FIGS. 7 to 9 and 11 to 13, it can be seen that the wireless communication unit 7 of the ventilation device 1 according to the embodiment can improve the communication performance in the downward direction (in the negative direction of the Z axis) compared to the ventilation device 1a according to the comparative example. I understand. Specifically, the average gain (antenna efficiency) in the negative direction of the Z axis of the wireless communication unit 7 of the ventilation device 1a according to the comparative example was −4.0 dB, whereas the ventilation device 1 according to the embodiment The average gain of the wireless communication section 7 in the negative Z-axis direction was -2.1 dB. In this case, in the embodiment, the average gain is about 1.5 times that of the comparative example. Thereby, in the wireless communication unit 7 of the ventilation device 1 according to the embodiment, the communication performance below the main body case 2 is improved compared to the wireless communication unit 7 of the ventilation device 1a according to the comparative example.

In the ventilation device 1 according to the embodiment, the communication performance in the downward direction (in the negative direction of the Z axis) can be improved compared to the ventilation device 1a according to the comparative example, so that it is also easier to use compared to the ventilation device 1a according to the comparative example.

(5) Advantages In the ventilation device 1 according to the embodiment, the wireless communication unit 7 includes an antenna 71 and performs wireless communication using radio waves of a predetermined wavelength as a medium. When the main body case 2 is viewed from below, the antenna 71 is located within a rectangular area A1 defined by the first point P1 to the fourth point P4. The first point P1 is connected to a first straight line L1 including a linear first peripheral edge 261 along the first direction D1 among the peripheral edge 260 of the first opening 26 and a first straight line L1 including a linear first peripheral edge 261 along the first direction D1 among the peripheral edge 260 of the first opening 26. It is an intersection with a second straight line L2 including a linear second peripheral edge 262 along a second direction D2 orthogonal to the second direction D2. The second point P2 is a point separated by a distance of 1/2 of the predetermined wavelength from the first point P1 in the first direction D1. The third point P3 is a point separated by a distance of 1/2 of the predetermined wavelength from the second point P2 in the second direction D2. The fourth point P4 is a point separated by a distance of 1/2 of the predetermined wavelength from the first point P1 in the second direction D2.

In the ventilation device 1 according to the embodiment, since the wireless communication section 7 is located within the rectangular area A1 when the main body case 2 is viewed from below, communication performance can be improved.

(6) Modification of the embodiment The embodiment is just one of various embodiments of the present disclosure. The embodiments can be modified in various ways depending on the design, etc., as long as the objective of the present disclosure can be achieved.

Although the ventilation device 1 is an exhaust device that exhausts indoor air to the outdoors, the ventilation device 1 is not limited to this, and may be an air supply device that supplies outdoor air into the room.

Further, although the main body case 2 has the second opening 28 in the peripheral wall 25, the present invention is not limited to this, and the second opening 28 may be provided in the upper wall 20. Further, the main body case 2 may have a second opening 28 in the center of the first side wall 21 in the first direction D1.

Further, the opening shape of the first opening 26 of the main body case 2 is not limited to a strictly rectangular shape, but may be a substantially rectangular shape. Here, in the ventilation device 1, the first corner portion C1 may be rounded when viewed from the bottom of the main body case 2.

In the ventilation device 1, the main body case 2 may be subjected to an appropriate surface treatment. Examples of the surface treatment include painting, plating, alumite treatment, and coating.

Further, in the ventilation device 1, the center portion 17 of the cover 10 may be an LED unit that illuminates the lower part of the ventilation device 1.

In the blower unit 3, the rotating shaft 61 of the motor 6 is directly connected to the fan 4, but the invention is not limited to this, and the rotating shaft 61 may be connected indirectly.

In the ventilation device 1, the control unit 8 may control the blower unit 3 based on the output of the sensor. The sensor is, for example, an air quality sensor that detects at least one of temperature, humidity, and CO ₂ concentration. The ventilation device 1 may or may not be equipped with the sensor.

Further, the ventilation device 1 may include an air filter disposed between the cover 10 and the first opening 26. The air filter is, for example, a HEPA filter (High Efficiency Particulate Air Filter).

Further, in the ventilation system 100 according to the embodiment, the information terminal 103 is not a component of the ventilation system 100, but may be included in the ventilation system 100 as a component of the ventilation system 100.

Further, in the ventilation system 100 according to the embodiment, the repeater 102 is not a component of the ventilation system 100, but may be included in the ventilation system 100 as a component of the ventilation system 100.

(mode)
The following aspects are disclosed herein.

A ventilation device (1) according to a first aspect includes a main body case (2), a blower unit (3), a wireless communication section (7), and a control section (8). The main body case (2) is made of metal. The main body case (2) has a rectangular box shape with a first opening (26) on the lower surface, and a second opening on the peripheral wall (25) or the upper wall (20). The blower unit (3) is arranged inside the main body case (2). The blower unit (3) sends air between the first opening (26) and the second opening (28). The wireless communication unit (7) has an antenna (71) and performs wireless communication using radio waves of a predetermined wavelength as a medium. The control section (8) is connected to the wireless communication section (7). The control section (8) controls the blower unit (3) according to the signal received by the wireless communication section (7). When the main body case (2) is viewed from below, the antenna (71) is defined by a first point (P1), a second point (P2), a third point (P3), and a fourth point (P4). is within the rectangular area (A1) and is away from the periphery (260) of the first opening (26) in the main body case (2). The first point (P1) is connected to a first straight line (L1) including a linear first peripheral edge (261) along the first direction (D1) among the peripheral edge (260) of the first opening (26); An intersection with a second straight line (L2) including a linear second peripheral edge (262) along a second direction (D2) perpendicular to the first direction (D1) among the peripheral edge (260) of the first opening (26) It is. The second point (P2) is a point separated by a distance of 1/2 of the predetermined wavelength from the first point (P1) in the first direction (D1). The third point (P3) is a point separated by a distance of 1/2 of the predetermined wavelength from the second point (P2) in the second direction (D2). The fourth point (P4) is a point separated by a distance of 1/2 of the predetermined wavelength from the first point (P1) in the second direction (D2).

In the ventilation device (1) according to the first aspect, wireless communication is possible and communication performance can be improved.

In the ventilation device (1) according to the second aspect, in the first aspect, the blower unit (3) includes a fan case (5), a fan (4), and a motor (6). The fan case (5) is made of resin. The fan case (5) has a third opening (56) connected to the first opening (26) and a fourth opening (58) connected to the second opening (28). The fan (4) is made of resin. The fan (4) is arranged within the fan case (5). The motor (6) has a rotating shaft (61) and rotates the fan (4) together with the rotating shaft (61).

In the ventilation device (1) according to the second aspect, it is possible to suppress the fan case (5) from affecting the communication state of the wireless communication unit (7).

In the ventilation device (1) according to the third aspect, in the second aspect, the fan (4) is a centrifugal fan. When the main body case (2) is viewed from below, the rotation shaft (61) of the motor (6) is located at the first corner including the first point (P1) of the periphery (260) of the first opening (26). on the second corner part (C2) side from the center (E3) of the diagonal line (L3) connecting the part (C1) and the second corner part (C2), which is the diagonal of the first corner part (C1). positioned.

In the ventilation device (1) according to the third aspect, the fan case (5) can be compactly stored in the main body case (2), and the enlargement of the main body case (2) can be suppressed.

The ventilation device (1) according to the fourth aspect further includes a holding member (9) in the third aspect. The holding member (9) holds a control section (8) and a wireless communication section (7). The holding member (9) is attached to the fan case (5). When the main body case (2) is viewed from below, the holding member (9) is located closer to the first corner portion (C1) than the center (E3) of the diagonal line (L3).

In the ventilation device (1) according to the fourth aspect, the fan case (5) can be compactly stored in the main body case (2), and the holding member (9) can be arranged near the first corner part (C1). It becomes possible.

In the ventilation device (1) according to the fifth aspect, in any one of the first to fourth aspects, the first opening (26) is the intake port, and the second opening (28) is the exhaust port. The blower unit (3) sends the air sucked in from the first opening (26) to the second opening (28).

The ventilation device (1) according to the fifth aspect can be used as an exhaust device.

The ventilation device according to the sixth aspect, in any one of the first to fifth aspects, further includes a cover (10). The cover (10) is made of resin. The cover (10) covers the first opening (26) of the main case (2) and has a vent (16) connected to the first opening (26).

In the ventilation device (1) according to the sixth aspect, communication performance can be improved.

In the ventilation device (1) according to the seventh aspect, in any one of the first to sixth aspects, the peripheral wall includes a first side wall (21) corresponding to the first peripheral edge and a second side wall (21) corresponding to the second peripheral edge. 2 side walls (22). The main body case (2) has a second opening (28) in the first side wall (21). The ventilation device (1) further comprises a duct connection (19). The duct connection part (19) is made of metal. The duct connection part (19) has a cylindrical shape and has an internal space connected to the second opening (28). The duct connection part (19) is arranged on the outer surface of the first side wall (21).

In the ventilation device (1) according to the seventh aspect, it is possible to suppress the duct connection part (19) from influencing the communication state of the wireless communication part (7).

A ventilation system (100) according to the eighth aspect includes the ventilation device (1) according to any one of the first to seventh aspects and a device (base unit 101). The device (master device 101) performs wireless communication with the wireless communication section (7) of the ventilation device (1).

In the ventilation system (100) according to the eighth aspect, wireless communication is possible and communication performance can be improved.

1 Ventilation device 2 Main body case 20 Upper wall 21 First side wall 22 Second side wall 23 Third side wall 24 Fourth side wall 25 Peripheral wall 26 First opening 260 Peripheral edge 261 First peripheral edge 262 Second peripheral edge 28 Second opening 3 Air blowing unit 4 Fan 5 Case 56 Third opening 58 Fourth opening 6 Motor 61 Rotating shaft 7 Wireless communication section 71 Antenna 10 Cover 16 Ventilation port 19 Duct connection section 100 Ventilation system 101 Main unit (equipment)
A1 Rectangular area C1 First corner C2 Second corner D1 First direction D2 Second direction E3 Center P1 First point P2 Second point P3 Third point P4 Fourth point L1 First straight line L2 Second straight line L3 Diagonal line

Claims (6)

a rectangular box-shaped metal main body case having a first opening on the lower surface and a second opening on the peripheral wall or the upper wall;
a blower unit that is disposed within the main body case and sends air between the first opening and the second opening;
a wireless communication unit having an antenna and performing wireless communication using radio waves of a predetermined wavelength as a medium;
a control unit that is connected to the wireless communication unit and controls the blower unit according to a signal received in the wireless communication unit,
When the main body case is viewed from below, the antenna is located within a rectangular area defined by a first point, a second point, a third point, and a fourth point, and 1 away from the periphery of the opening,
The first point is perpendicular to a first straight line including a linear first peripheral edge along a first direction among the peripheral edges of the first opening, and a first straight line including a linear first peripheral edge along the first direction among the peripheral edges of the first opening. an intersection with a second straight line including a straight second peripheral edge along the second direction;
The second point is a point separated from the first point by a distance of 1/2 of the predetermined wavelength in the first direction,
The third point is a point separated by a distance of 1/2 of the predetermined wavelength from the second point in the second direction,
The fourth point is a point separated by a distance of 1/2 of the predetermined wavelength from the first point in the second direction,
The blower unit is
a resin fan case having a third opening connected to the first opening and a fourth opening connected to the second opening;
a resin fan disposed within the fan case;
a motor having a rotating shaft and rotating the fan together with the rotating shaft;
The blower unit is a centrifugal fan,
When the main body case is viewed from below, the rotating shaft of the motor is located at a first corner portion including the first point of the peripheral edge of the first opening, and at a diagonal corner of the first corner portion. The second corner portion is located closer to the second corner portion than the center of the diagonal line connecting the second corner portion.
Ventilation equipment. further comprising a holding member holding the control unit and the wireless communication unit,
The holding member is attached to the fan case,
When the main body case is viewed from below, the holding member is located closer to the first corner than the center of the diagonal line.
A ventilator according to claim 1. the first opening is an intake port,
the second opening is an exhaust port;
The blower unit sends the air drawn in from the first opening to the second opening.
The ventilation device according to claim 1 or 2. further comprising a resin cover that covers the first opening of the main body case and has a vent connected to the first opening;
Ventilation device according to any one of claims 1 to 3. The peripheral wall is
a first side wall corresponding to the first peripheral edge;
a second side wall corresponding to the second peripheral edge;
The main body case has the second opening in the first side wall,
The duct has a cylindrical shape and has an internal space connected to the second opening, and further includes a metal duct connection part disposed on an outer surface of the first side wall.
Ventilation device according to any one of claims 1 to 4. A ventilation device according to any one of claims 1 to 5,
a device that performs wireless communication with the wireless communication unit of the ventilation device;
ventilation system.

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