JP4835319B2 - Blower - Google Patents

Description

  The present invention relates to a rotary fan for exhausting inhaled air to the outdoors, a fan motor for rotationally driving the rotary fan, a control means for controlling drive of the fan motor, and air exhausted by the rotation of the rotary fan. It is related with the air blower which has a duct connection part which guides to the outdoors.

  In general buildings, many air blowers are installed to perform air conditioning in the building. In particular, in recent years, it has been obliged to install a 24-hour ventilation system in a building having a living room, so that a bathroom air conditioner or the like is often used as a blower for indoor ventilation.

  In general, a multi-blade fan such as a sirocco fan is used as a blower for indoor ventilation. The sirocco fan has a structure in which air is sucked and discharged from the center of rotation to the circumferential direction by rotating a disk-shaped fan having a plurality of blades disposed on the peripheral edge. Since the blower using a sirocco fan can reduce the thickness (height) of the equipment due to its structure, it is easy to design the apparatus main body in a compact manner (see, for example, Patent Document 1).

When ventilating indoors using such a blower, it is desirable to always keep the exhaust air volume constant, but when the outdoor wind pressure or the like (external wind pressure) is high, the exhaust duct connected to the blower Since there is a possibility that outside air may enter the indoors through the air, the pressure loss to the sirocco fan of the air conditioner tends to increase and the rotation speed of the sirocco fan tends to increase. In order to suppress such fluctuations in the exhaust air volume due to fluctuations in the rotational speed of the fan, a method has been proposed in which the state of the external air pressure is detected by measuring the rotational speed of the fan and the rotational air volume of the fan is kept constant. (For example, refer to Patent Document 2).
JP 2004-340407 A (page 4-6, FIG. 1) JP 2004-340490 A (page 4-6, FIG. 3)

  However, the factors that change the rotation speed of the fan are not limited to the state of the external wind pressure, but the temperature of the motor itself (depending on the temperature characteristics of the constituent materials of the motor), the temperature of the outside air, the intake duct and the exhaust duct. May vary depending on the length, the inner diameter of the duct, the bending state of the duct, and the like. Furthermore, since the amount of change may differ for each motor, it is not easy to determine the state of the external wind pressure only by the change in the rotation speed of the fan.

  For this reason, if the air flow control of the fan is performed by judging the external air pressure state according to the change in the rotation speed of the fan, there is a risk that the control including an error that cannot be assumed as a result may be performed. There was a risk that it would be difficult to perform.

  This invention is made | formed in view of the said problem, and makes it a subject to provide the air blower which can ensure a fixed total air volume irrespective of the change of an external wind pressure.

  In order to solve the above-mentioned problems, a blower according to the present invention includes a rotary fan for exhausting sucked air to the outdoors, a fan motor for rotating the rotary fan, and drive control of the fan motor. Control means for performing, and a duct connecting portion for guiding the air exhausted by the rotation of the rotary fan to the outside, and the shutter means for opening and closing the duct connecting portion according to the air volume of the exhausted air Provided, the control unit determines an opening / closing degree of the shutter unit by detecting a rotation angle of the shutter unit, and calculates an exhaust air volume at the duct connection unit based on the opening / closing degree of the shutter unit; The drive control of the fan motor is performed based on the difference between the calculated exhaust air volume and a predetermined set air volume.

  The blower device may include an angle detection unit that detects a rotation angle of the shutter unit and an origin detection unit that detects an origin of the rotation angle detected by the angle detection unit. .

  Further, the control means may detect a rotation angle of the shutter means after driving the fan motor with a predetermined drive control amount for a predetermined time.

  Further, the control means may detect the rotation angle a plurality of times and determine an opening / closing degree of the shutter means using an average value of the detected rotation angles.

  According to the air blower according to the present invention, the control means determines the exhaust air volume in accordance with the degree of opening and closing of the shutter means. Therefore, the fan motor drive control is performed by calculating the external air pressure based on the rotational speed fluctuation of the rotary fan. Compared to the case, it is possible to directly determine the exhaust air volume without being influenced by multiple factors such as the outside air temperature and the motor temperature, and to accurately control the fan motor drive so that the predetermined exhaust air volume can be maintained. It can be performed.

  In particular, the control unit calculates the exhaust air volume at the duct connection portion based on the degree of opening and closing of the shutter means, and performs drive control of the fan motor based on the difference between the calculated exhaust air volume and a predetermined set air volume, More accurate drive control can be performed.

  Further, since the exhaust air volume can be obtained based on the degree of opening and closing of the shutter means, it is not necessary to detect the rotational speed of the rotary fan, and the configuration can be simplified and the increase in cost can be suppressed.

  Moreover, in the air blower according to the present invention, since the control means determines the opening / closing degree of the shutter means by detecting the rotation angle of the shutter means, it is possible to accurately and quantitatively measure the opening / closing state. .

  In particular, when the blower device has an angle detection means for detecting the rotation angle of the shutter means and an origin detection means for detecting the origin of the rotation angle detected by the angle detection means, the angle detection means simplifies the operation. In addition, highly accurate angle detection can be performed, and by using the origin detection sensor unit, origin detection can be reliably performed every time the fan motor is driven and controlled to open and close the shutter means. It becomes possible to improve the detection accuracy.

  Further, after the control means drives the fan motor with a predetermined drive control amount for a predetermined time, and detects the rotation angle of the shutter means, the drive state of the fan motor, the rotation state of the rotary fan, and the shutter means Since the rotation angle of the shutter means can be detected in a stable state of the rotation angle, the rotation angle of the shutter means corresponding to the set fan motor drive control amount can be accurately detected. It becomes.

  Further, since the control means detects the rotation angle a plurality of times and determines the opening / closing degree of the shutter means using the average value of the detected rotation angles, the shutter means rotated with the rotation of the rotary fan is constant. Even when it vibrates slightly without stopping at the rotation angle of (a state of moving in small increments), it is possible to detect the rotation angle considering the fluctuation of this rotation angle, and more accurate opening / closing detection Can be performed.

  Hereinafter, the case where the air blower according to the present invention is used as a bathroom air conditioner will be described.

  FIG. 1 is a view showing a state in which a bathroom air conditioner 1 is installed in a bathroom 2. The bathroom air conditioner 1 has a main body case 3 and a front panel 4.

  As shown in FIG. 2, the main body case 3 is a box-shaped body having an opening formed on the bottom surface, and is formed of a nonflammable material such as metal. Inside the box-shaped body portion, a circulation air conditioning unit and a ventilation air conditioning unit described below are accommodated. Further, the side surface of the main body case 3 is provided with an exhaust duct connection portion 6 to which an exhaust duct 5 is connected and an exhaust shutter for preventing a reverse wind is provided, and an intake duct connection portion 8 to which an intake duct 7 is connected. ing.

  The bathroom air conditioner 1 is installed behind the ceiling of the bathroom 2. An opening corresponding to the main body case 3 is formed in the ceiling panel 2a constituting the ceiling of the bathroom 2, and the bathroom air conditioner 1 is arranged on the back of the ceiling so that the lower portion of the main body case 3 is exposed from the opening. It is fixed.

  The front panel 4 is installed so as to cover the lower part of the main body case 3 exposed from the opening of the ceiling panel 2a from the bathroom side. The front panel 4 is provided with a panel suction port 4a for sucking air in the bathroom 2 and a panel outlet 4b for blowing air sucked from the panel suction port 4a into the bathroom 2.

  The air intake duct 7 connected to the air intake duct connecting portion 8 of the bathroom air conditioner 1 is connected to an air inlet 11 provided on a ceiling other than the bathroom 2 such as a washroom (dressing room) 10 as shown in FIG. Has been. The washroom 10 is provided with an operation panel 13 for operating the bathroom air conditioner 1.

  Moreover, the exhaust duct 5 connected to the exhaust duct connection part 6 of the bathroom air conditioner 1 is connected to the exhaust grill 12 attached to the outer wall of the building. The air sucked in the bathroom 2 or the washroom 10 is exhausted from the exhaust grill 12 to the outside through the exhaust duct connecting portion 6 and the exhaust duct 5.

  On the other hand, the bathroom 2 is provided with a bathroom door 14 for entering and exiting the bathroom 10 and the bathroom 2, and the bathroom door 14 is provided with a gallery 15 for taking in air from the bathroom 10. ing. For this reason, for example, even when the air intake duct 7 is not connected to the bathroom air conditioner 1, the bathroom air conditioner 1 sucks air in the bathroom 2, so It is possible to suck in air from other rooms and exhaust the air to the outside through the exhaust duct connection portion 6 and the exhaust duct 5.

  3 shows a bottom view of the bathroom air conditioner 1, FIG. 4 is a side sectional view showing the AA section of FIG. 3 from the arrow direction, and FIG. 5 is a BB section of FIG. The side sectional view shown from the arrow direction is shown.

  As shown in FIGS. 4 and 5, the main body case 3 is provided with a circulation air conditioning unit 20 and a ventilation air conditioning unit 40.

  The circulation air conditioning unit 20 is installed in the lower part of the main body case 3, and has a circulation fan part 21 and a ventilation passage part 22, as shown in FIG.

  The ventilation passage portion 22 is a cylindrical member provided adjacent to the circulation fan portion 21 and has an upper surface and a bottom surface opened. The lower surface opening 22 a of the ventilation passage 22 faces the bathroom 2 through the panel suction port 4 a of the front panel 4, and the upper surface opening 22 b faces the ventilation suction port 46 of the ventilation air conditioning unit 40.

  The circulation fan unit 21 includes a circulation sirocco fan 23, a circulation fan motor 24, a circulation fan case 25, and a heater unit 26. The circulation sirocco fan 23 is a multi-blade fan in which a large number of blades 23b are provided at the peripheral edge of the main plate 23a. By the rotation of the circulation sirocco fan 23, the circulation fan portion is located from the front in front of the main plate 23a via the numerous blades 23b. It is possible to guide air to the inside of 21.

  The circulation fan motor 24 is a motor for rotationally driving the circulation sirocco fan 23. As shown in FIGS. 4 and 5, the circulation fan motor 24 is installed above the circulation sirocco fan 23, and is directly below the circulation fan motor 24. By rotating the rotating shaft that is suspended from the rotating shaft, the circulating sirocco fan 23 fixed to the rotating shaft is rotated.

  The circulation fan case 25 is a case that houses the circulation sirocco fan 23, and has a role of forming a guide air passage for circulating the air sucked by the circulation sirocco fan 23 to the bathroom 2. As shown in FIGS. 4 and 5, a circulation suction port 27 for sucking air in the bathroom is provided at the bottom of the circulation fan case 25 and facing the main plate 23a of the circulation sirocco fan 23. It is formed in a circular shape corresponding to 23. Further, a circulation outlet 28 for blowing out air sucked by the circulation sirocco fan 23 to the bathroom 2 is formed at the bottom end of the circulation fan case 25.

  The heater portion 26 is an internal passage of the circulation fan case 25 and is provided in the vicinity of the circulation outlet 28. A PTC heater is used for the heater unit 26, and the PTC heater is turned on / off in accordance with control of a control unit described later.

  As shown in FIGS. 4 and 5, the ventilation air conditioning unit 40 includes a ventilation fan unit 41 installed on the upper portion of the main body case 3 and a circuit board unit 42.

  The ventilation fan unit 41 includes a ventilation sirocco fan 43, a ventilation fan motor 44, and a ventilation fan case 45. The ventilation sirocco fan 43 is a multi-blade fan in which a large number of blades 43 b are provided on the peripheral edge of the main plate 43 a, as with the circulation sirocco fan 23. The rotation of the ventilation sirocco fan 43 causes the intake duct 7 and the ventilation passage portion. It is possible to guide the air guided through 22 to the inside of the ventilation fan unit 41.

  The ventilation fan motor 44 is a motor for rotationally driving the ventilation sirocco fan 43, and is installed above the ventilation sirocco fan 43 as shown in FIG. By rotating a rotating shaft that is suspended downward from the ventilation fan motor 44, the ventilation sirocco fan 43 fixed to the rotating shaft is rotated.

  The ventilation fan case 45 is a case for storing the ventilation sirocco fan 43, and guide air for discharging the air sucked by the ventilation sirocco fan 43 to the outside through the exhaust duct connection portion 6 and the exhaust duct 5. It has a role to form a road. As shown in FIG. 4, a circular ventilation inlet 46 for inhaling air is formed at the bottom surface of the ventilation fan case 45 and facing the main plate 43 a of the ventilation sirocco fan 43. The ventilation suction port 46 is provided at a position facing the upper surface opening 22b of the ventilation passage portion 22 in front, and smoothly guides the air in the bathroom 2 to the ventilation fan portion 41 via the ventilation passage portion 22. It is possible. Further, a ventilation exhaust port 47 communicating with the exhaust duct connection portion 6 is provided at a side portion of the ventilation fan case 45, and the air sucked by the ventilation sirocco fan 43 is discharged from the ventilation exhaust port 47 to the exhaust duct connection portion. 6. It is structured to be exhausted to the outside through the exhaust duct 5.

  The circuit board part 42 is installed adjacent to the ventilation duct part 41 on the intake duct connection part 8 side. The circuit board 42 is provided with a control unit 50 (see FIG. 8) for controlling the circulation fan motor 24, the heater unit 26, and the ventilation fan motor 44 of the bathroom air conditioner 1.

  When the ventilation air conditioning unit 40 and the circulation air conditioning unit 20 are housed and installed in the main body case 3, as shown in FIG. 4, the ventilation fan unit 41 is provided so as to be positioned above the ventilation passage unit 22 and is circulated. Since the fan unit 21 is installed with a height L gap between the fan unit 21 and the ventilation fan unit 41, the ventilation fan unit 41 is connected to the main body case 3 via the intake duct 7 and the intake duct connection unit 8. It is possible to inhale the guided air and the air guided from the bathroom 2 through the ventilation passage portion 22 (see the chain line arrow shown in FIG. 4).

  FIG. 6 is an exploded perspective view showing the exhaust duct connecting portion 6. The exhaust duct connection portion 6 includes a connection main body portion 55, an encoder box portion 60, and an exhaust shutter portion 70.

  The connection main body portion 55 includes a connection main body case 56 that houses the exhaust shutter portion 70 and a connection joint portion 57 that connects the exhaust duct 5. The connection main body case 56 is a box whose one side surface is released, and a connection edge 58 for connecting to the main body case 3 is formed on the periphery of the released side surface. A circular hole is provided on the side surface of the connection main body case 56 that faces the released side surface, and a connection joint portion 57 is connected to the peripheral edge of the circular hole.

  The exhaust shutter portion 70 is provided so as to be housed in the connection main body portion 55, and fills the gap between the exhaust shutter 71, the exhaust shutter frame 72 to which the exhaust shutter 71 is attached, and the exhaust shutter 71 and the exhaust shutter frame 72. Thus, the shutter cushion 73 attached to the exhaust shutter frame 72 is provided.

  The outer frame size of the exhaust shutter frame 72 is defined so that no gap is generated between the exhaust shutter frame 72 and the inner wall of the connection main body case 56 when housed in the connection main body case 56. An opening 72 a having a size corresponding to the exhaust shutter 71 is formed at the center of the exhaust shutter frame 72. In the upper part of the left and right side walls of the opening 72a, storage holes 75 for storing the bearing members 74 are provided symmetrically.

  The exhaust shutter 71 is a plate-like body having a size corresponding to the opening 72 a of the exhaust shutter frame 72, and prevents outdoor air from flowing backward from the outdoors to the ventilation air conditioning unit 40 through the exhaust duct 5. Is provided. A shaft portion 71 a that is pivotally supported by a bearing member 74 is provided on the left and right side surfaces of the exhaust shutter 71. The shaft portion 71 a is pivotally supported by a bearing member 74 that is installed on the exhaust shutter frame 72. By doing so, the opening / closing degree (rotation angle) of the exhaust shutter 71 is changed in accordance with the amount of air passing through the exhaust duct connecting portion 6.

  When the shutter cushion 73 is in a stop position where the exhaust shutter 71 is not rotated (a position where the opening 72a of the exhaust shutter frame 72 is closed), air is released from the gap between the exhaust shutter 71 and the exhaust shutter frame 72. It is attached to the inner surface of the exhaust shutter frame 72 so as not to pass.

  The encoder box section 60 is provided with an encoder shaft 61, a first slit section 62 and a second slit section 63 connected to the encoder shaft 61, and a sensor for detecting the rotation angle and origin of the encoder shaft 61. It has the base | substrate 64 and the encoder box 65 which accommodates these.

  The encoder box 65 has a box main body portion 65a in which a pair of opposing side surfaces are released, and a box cover 65b attached to the box main body portion 65a so as to cover the released side surfaces.

  The encoder shaft 61 is connected to the end portion of the shaft portion 71 a of the exhaust shutter 71 and is configured to rotate according to the rotation of the exhaust shutter 71. The encoder base 64 includes an angle detection photo interrupter 66 that detects the rotation angle of the exhaust shutter 71 using the first slit 62 and an origin that detects the origin of the exhaust shutter 71 using the second slit 63. And a detection sensor unit 67.

  The angle detection photo-interrupter unit 66 includes a light-emitting element unit and a light-receiving element unit, and counts the light-receiving pulses received by the light-receiving element according to the light-transmitting state of light emitted from the light-emitting element, and the exhaust shutter The rotation state of 71 is detected. Similarly, the origin detection sensor part 67 is also provided with a light emitting element part and a light receiving element part. The rotation of the exhaust shutter 71 is based on the timing when the light emitted from the light emitting element cannot be received by the light receiving element. Set the origin for angle detection.

  The first slit portion 62 and the second slit portion 63 are fixed to the encoder shaft 61 in a state where a predetermined interval is maintained by the spacer member 68. The 1st slit part 62 and the 2nd slit part 63 have the slit circumference parts 62a and 63a provided in circular arc shape. The slit circumferential part 62a of the first slit part 62 is provided with optical windows that transmit light emitted from the light emitting element part at regular intervals, and is emitted from the light emitting element part of the angle detecting photointerrupter part 66. When the light passes through the optical window and is received by the light receiving element unit, the angle detection photo interrupter unit 66 counts the light reception pulse of the light and determines the rotation state of the exhaust shutter 71. On the other hand, the slit circumferential part 63 a of the second slit part 63 is provided with a shielding part that shields light emitted from the light emitting element part of the origin detection sensor part 67.

  FIG. 7 shows the rotation state of the first slit portion 62 and the second slit portion 63 according to the rotation of the exhaust shutter 71. First, in a state where the exhaust shutter 71 is not rotated (stop position state), as shown in FIG. 7 (b 1), the slit circumferential portion 62 a of the first slit portion 62 is formed of the angle detection photo interrupter portion 66. It passes between the light emitting element and the light receiving element. On the other hand, the slit circumferential part 63a of the second slit part 63 is not passing between the light emitting element and the light receiving element of the origin detection sensor part 67, as shown in FIG. In the state, since the light emitted from the light emitting element of the origin detection sensor unit 67 is received by the light receiving element without being blocked by the slit circumferential part 63a, the origin is not detected.

  Next, when the exhaust shutter 71 is rotated to 15 degrees, the slit circumferential portion 62a of the first slit portion 62 is connected to the light emitting element of the angle detection photo-interrupter portion 66 as shown in FIG. 7 (b2). It is rotated while passing between the light receiving elements. On the other hand, as shown in FIG. 7 (a2), the slit circumferential portion 63a of the second slit portion 63 has an end portion of the slit circumferential portion 63a between the light emitting element and the light receiving element of the origin detection sensor portion 67. Since it enters the state, the light emitted from the light emitting element of the origin detection sensor unit 67 is blocked by the slit circumferential part 63a, and the control unit 50 detects the origin of the exhaust shutter 71 at this timing. That is, using the time point when the exhaust shutter 71 is rotated by 15 degrees as a reference (origin), the control unit 50 counts the light reception pulses detected by the angle detection photo-interrupter unit 66 and detects the angle of the exhaust shutter 71. Do.

  FIGS. 7 (a3) and 7 (b3) show a state in which the exhaust shutter 71 has been rotated to the fully open position (90-degree rotation position, position where the exhaust shutter 71 is horizontal). In a state in which the exhaust shutter 71 is rotated to the fully open position, the slit circumferential portion 62a of the first slit portion 62 has a light emitting element and a light receiving element of the angle detecting photointerrupter portion 66 as shown in FIG. 7 (b3). It is rotated in a state of passing between. Further, the slit circumferential portion 63a of the second slit portion 63 also has a state in which the slit circumferential portion 63a passes between the light emitting element and the light receiving element of the origin detection sensor portion 67, as shown in FIG. Become. Thus, while the exhaust shutter is rotated from 15 degrees to 90 degrees, the slit circumferential portion 63a of the second slit portion 63 continues to block the light emitted from the light emitting element of the origin detection sensor portion 67. Unless the exhaust shutter 71 is rotated to a predetermined angle (for example, 15 degrees) or less, the origin detection is not performed.

  As described above, the control unit 50 detects the origin based on the light reception state in the origin detection sensor unit 67 and detects the rotation angle of the exhaust shutter 71 based on the light reception pulse detected by the angle detection photointerrupter unit 66. .

  FIG. 8 is a block diagram illustrating a control configuration of the control unit 50 provided in the circuit board unit 42. The control unit 50 is configured by a CPU (Central Processing Unit), a memory, and the like. Setting information set on the operation panel 13 is transmitted to the control unit 50 and is detected by an angle detection photo-interrupter unit 66. The rotation angle of the exhaust shutter 71 thus transmitted is transmitted as the number of pulses, and the origin information detected by the origin detection sensor unit 67 is transmitted. The control unit 50 is connected to the circulation fan motor 24, the ventilation fan motor 44, the heater unit 26, and the like, and the control unit 50 controls the circulation fan motor 24, the ventilation fan motor 44, and the heater unit 26. . Further, the control unit 50 is connected to a recording unit 51 in which control data necessary for controlling the circulation fan motor 24, the ventilation fan motor 44, and the like according to the rotation angle of the exhaust shutter 71 is recorded. The control unit 50 uses the control data of the recording unit 51 as necessary when the circulation fan motor 24 and the ventilation fan motor 44 are controlled.

  FIG. 9 is a diagram illustrating an example of the operation panel 13. The operation panel 13 includes a display unit 80 such as an LCD and various operation buttons. As the operation buttons, for example, a 24-hour ventilation mode button 81 for turning on / off 24-hour ventilation in the bathroom air conditioner 1, a heating mode button 82 for selecting a heating operation mode, a cool air mode button 83 for selecting a cool air operation mode, A ventilation mode button 84 for selecting a ventilation operation mode and a drying mode button 85 for selecting a drying operation mode are provided.

  When the user presses each button, the above-described various operation modes can be selected.

  When the user presses the heating mode button 82 and selects the heating operation mode, the control unit 50 acquires the operation mode information of the heating operation mode and sends a control signal to the circulation fan motor 24 and the heater unit 26. . When the driving of the circulation fan motor 24 is started based on the control signal of the control unit 50, the air in the bathroom 2 flows from the circulation suction port 27 of the circulation fan unit 21 through the panel suction port 4 a of the front panel 4. 25, and is guided to the heater portion 26 of the circulation fan case 25.

  In the heater unit 26, the PCT heater of the heater unit 26 is energized based on the control signal of the control unit 50, so the air in the circulation fan case 25 led to the heater unit 26 is warmed by the heater unit 26. Are blown into the bathroom 2 through the circulation outlet 28 and the panel outlet 4b. Heating of the bathroom 2 is performed by blowing out the warm air.

  Thus, by driving the bathroom air conditioner 1 in the heating operation mode, the bathroom can be warmed before bathing, and the bathroom 2 can be kept warm even during bathing.

  In the heating operation mode, no control signal is sent from the control unit 50 to the ventilation fan motor 44. For this reason, the ventilation fan motor 44 is not driven in the heating operation mode, and the air in the bathroom 2 is not ventilated to the outside, so that the air heated by the heater part 26 of the circulation fan part 21 is not contained in the bathroom 2. Can be maintained.

  The operation panel 13 is provided with a lamp 86 corresponding to each button, for example, so that the user can confirm the selected operation mode. For example, when the heating mode button 82 is pressed, heating is performed. The lamp 86 above the mode button 82 is turned on.

  The operation panel 13 is provided with a timer button 87. After the operation mode is selected and executed by the operation panel 13, the timer button 87 is pressed to select and execute after a predetermined time (after the timer time). The completed operation mode can be terminated.

  When the user presses the cool air mode button 83 and selects the cool air operation mode, the control unit 50 acquires the operation mode information of the cool air operation mode and sends a control signal to the circulation fan motor 24. When the driving of the circulation fan motor 24 is started based on the control signal of the control unit 50, the air in the bathroom 2 flows from the circulation suction port 27 of the circulation fan unit 21 through the panel suction port 4 a of the front panel 4. 25, and is guided to the heater portion 26 of the circulation fan case 25.

  Here, in the cool breeze operation mode, the control signal is not sent from the control unit 50 to the heater unit 26, so that the PCT heater is not energized. For this reason, the air in the circulation fan case 25 led to the heater part 26 is blown into the bathroom 2 through the circulation outlet 28 and the panel outlet 4b without being heated by the heater part 26.

  On the other hand, the control unit 50 sends a control signal to the ventilation fan motor 44. For this reason, since the ventilation fan motor 44 is driven and the ventilation sirocco fan is rotated, the air in the bathroom 2 is sucked into the ventilation fan case 45 through the ventilation inlet 46 and the exhaust duct connection portion 6 and the exhaust duct 5 are connected. Air is discharged to the outside through

  Thus, since the air sucked by the circulation air conditioning unit 20 is blown out into the bathroom 2 without being heated, the bathroom air conditioner 1 can be used like a fan in summer. Moreover, since the air in the bathroom 2 is exhausted outdoors by the ventilation air conditioning unit 40, the circulation ventilation operation is performed in the cool wind operation mode.

  When the user presses the ventilation mode button 84 and selects the ventilation operation mode, the control unit 50 acquires the operation mode information of the ventilation operation mode and sends a control signal to the ventilation fan motor 44. When the drive of the ventilation fan motor 44 is started based on the control signal of the control unit 50, the air in the bathroom 2 and the washroom 10 sucked through the intake duct 7 and the ventilation passage unit 22 enters the ventilation fan case 45. Then, the air is discharged to the outside through the exhaust duct connecting portion 6 and the exhaust duct 5.

  Thus, when the ventilation operation mode is selected, the air in the bathroom 2 and the washroom 10 is discharged to the outside, so that the bathroom and the washroom can be actively ventilated. In the ventilation operation mode, since it is not necessary to circulate the air in the bathroom 2, the control unit 50 does not send control signals to the circulation fan motor 24 and the heater unit 26, and the circulation fan motor 24 and the heater unit. 26 is stopped.

  It should be noted that in today's homes, the law mandates 24-hour ventilation to ventilate indoor air by a predetermined ventilation frequency (for example, 0.5 times / hour). For this reason, when the user presses the 24-hour ventilation mode button 81 and the 24-hour ventilation mode is selected, the ventilation fan motor 44 is continuously or intermittently driven in the same manner as the ventilation operation mode described above. The air in the bathroom 2 and other rooms will be discharged to the outside.

  When the user presses the drying mode button 85 and selects the drying operation mode, the control unit 50 acquires the operation mode information of the drying operation mode and sends a control signal to the circulation fan motor 24 and the heater unit 26. . When the driving of the circulation fan motor 24 is started based on the control signal of the control unit 50, the air in the bathroom 2 is sucked into the circulation fan case 25 via the panel suction port 4a and the circulation suction port 27, and the circulation fan Guided to the heater section 26 of the case 25.

  In the heater unit 26, the PCT heater is energized based on the control signal of the control unit 50, so that the air in the circulation fan case 25 led to the heater unit 26 is warmed by the heater unit 26, and the circulation outlet 28. And it blows out in the bathroom 2 through the panel blower outlet 4b. Heating of the bathroom 2 is performed by blowing out the warm air.

  Further, in the drying operation mode, the control unit 50 sends a control signal to the ventilation fan motor 44. When the drive of the ventilation fan motor 44 is started based on the control signal of the control unit 50, the air in the bathroom 2 is sucked into the ventilation fan case 45 through the panel suction port 4a and the ventilation passage unit 22, and the intake air The air in the bathroom is sucked into the ventilation fan case 45 through the duct 7 and the intake duct connecting portion 8, and then the air is discharged to the outside through the exhaust duct connecting portion 6 and the exhaust duct 5.

  In this way, the air in the bathroom 2 can be warmed by the circulation air conditioning unit 20, and the air in the bathroom 2 is exhausted to the outside by the ventilation air conditioning unit 40 to ventilate the bathroom 2. The laundry 17 can be hung from the laundry pipe 16 installed in the bathroom 2 so that the laundry 17 can be dried in the bathroom 2.

  As described above, when the operation mode is selected by the user, the circulation fan motor 24, the ventilation fan motor 44, the heater unit 26, and the like are driven to ventilate the bathroom 2 and the washroom 10.

  In addition, when the ventilation fan motor 44 of the ventilation air conditioning unit 40 is driven by the control unit 50, the rotational speed of the ventilation sirocco fan 43 fluctuates due to the external wind pressure from the outside as already described in "Background Art". There is a risk that it will be difficult to keep the air volume exhausted outdoors. For this reason, the control unit 50 detects the actual air volume exhausted by detecting the rotation angle of the exhaust shutter 71 by the angle detection photo-interrupter unit 66. This is because the exhaust shutter 71 is opened and closed (rotated) in accordance with the exhaust air volume, so that the relationship between the rotation angle and the exhaust air volume remains constant regardless of the pressure loss caused by the exhaust duct 5. It is.

  Therefore, it is possible to accurately determine the exhaust air volume by detecting the rotation angle of the exhaust shutter 71, and based on this exhaust air volume, the control unit 50 drives the ventilation sirocco fan 43 (motor output amount, duty amount). ), It becomes easy to keep the exhaust air volume discharged as a whole of the bathroom air conditioner 1 constant.

  FIG. 10 is a flowchart showing a process for controlling the ventilation fan motor 44 in the control unit 50 by detecting the rotation angle of the exhaust shutter 71 by the angle detection photo-interrupter unit 66.

  First, the control unit 50 drives the ventilation fan motor 44 to rotate the ventilation sirocco fan 43, and the exhaust value rotated according to the duty value (motor output value, PWM value) of the ventilation fan motor 44 and this duty value. The relationship with the rotation angle of the shutter 71 is detected (step S.1).

  FIG. 11A is a graph showing the relationship between the duty value of the ventilation fan motor 44 detected by this processing and the rotation angle of the exhaust shutter 71. The control unit 50 obtains the curve of the graph R shown in FIG. 11A by detecting the rotation angles A0, A1, and A2 of the exhaust shutter 71 when the duty values are D0, D1, and D2.

  Step S. When the rotation angle of the exhaust shutter 71 shown in FIG. 1 is detected, the control unit 50 detects the origin based on the transmission state in the origin detection sensor unit 67, and then receives the light received by the angle detection photointerrupter unit 66. Based on the pulse, the rotation angle of the exhaust shutter 71 is detected.

  Specifically, the controller 50 first drives the ventilation fan motor 44 by setting the duty value of the ventilation fan motor 44 to D2. Note that the control unit 50 sets a value such that the rotation angle of the exhaust shutter becomes an angle of 15 degrees or more as the duty value D2.

  When the ventilation fan motor 44 is driven at the duty value D2, the ventilation sirocco fan 43 is rotated, and air passes through the exhaust duct connection portion 6, so that the exhaust shutter 71 is rotated. At this time, the origin detection sensor unit 67 detects the state where the exhaust shutter 71 is rotated by 15 degrees, so that the control unit 50 detects the origin of the exhaust shutter 71 and the rotation angle of the exhaust shutter 71 is 15 degrees. initialize.

  Thereafter, the control unit 50 continues to maintain the duty value D2 of the ventilation fan motor 44 for the first predetermined time (several seconds), and then detects the rotation angle of the exhaust shutter 71 using the angle detection photo-interrupter unit 66. Further, the rotation angle of the exhaust shutter 71 is detected a plurality of times while maintaining the duty value D2 of the ventilation fan motor 44 for a second predetermined time (a time shorter than the first predetermined time). Is obtained as the rotation angle A2 of the exhaust shutter 71.

  Note that the duty value D2 of the ventilation fan motor 44 is maintained for the first predetermined time because the ventilation sirocco fan 43 rotates after the ventilation fan motor 44 starts to be driven at the duty value D2, The time until the rotation state of the ventilation sirocco fan 43 and the rotation angle state of the exhaust shutter 71 are stabilized is taken into consideration. The average of the rotation angle of the exhaust shutter 71 during the second predetermined time is obtained as the rotation angle A2 of the exhaust shutter 71. The exhaust shutter 71 does not stop at a constant rotation angle, but slightly vibrates. This is because the rotation angle A2 in consideration of the fluctuation of the rotation angle due to the vibration is detected.

  Thereafter, the control unit 50 similarly starts to detect the rotation angle of the exhaust shutter 71 after maintaining the duty value D1 of the ventilation fan motor 44 for the first predetermined time. While maintaining the duty value D1 for the second predetermined time, the rotation angle of the exhaust shutter 71 is detected a plurality of times, and the average of the detected rotation angles is obtained as the rotation angle A1 of the exhaust shutter 71. Then, the control unit 50 starts detecting the rotation angle of the exhaust shutter 71 after maintaining the duty value D0 of the ventilation fan motor 44 for the first predetermined time, and further sets the duty value D0 of the ventilation fan motor 44. The rotation angle of the exhaust shutter 71 is detected a plurality of times while maintaining the second predetermined time, and the average of the detected rotation angles is obtained as the rotation angle A0 of the exhaust shutter 71.

  Then, the control unit 50 calculates the graph R from the rotation angles A2, A1, and A0 of the exhaust shutter 71 corresponding to the obtained duty values D1, D2, and D3 of the ventilation fan motor 44.

  Next, the control unit 50 acquires operation mode information from the operation panel 13, and sets the preset air volume of the ventilation sirocco fan 43 according to the acquired operation mode in the information recorded in the recording unit 51 or in advance in the control unit 50. It calculates | requires based on the information recorded (step S.2). Then, the control unit 50 obtains the angle At of the exhaust shutter 71 corresponding to the obtained set air volume from a graph (or a conversion table or the like) representing the correspondence between the air quantity and angle of the exhaust shutter recorded in the recording unit 51. (Step S.3).

FIG. 11B shows a graph showing the correspondence between the air volume and the angle of the exhaust shutter 71. For example, when 100 m ³ / h is set as the set air volume Q, the control unit 50 determines the angle of the corresponding exhaust shutter 71 (more specifically, the number of received pulses from the graph shown in FIG. 11B). ) Find At.

  Then, the control unit 50 performs step S.1. 1 based on the graph R (see FIG. 11A) obtained by the process of step 1. The duty value Ds corresponding to the angle At of the exhaust shutter 71 obtained by the process 3 is obtained (see FIG. 11B, step S.4).

  Thereafter, the control unit 50 sets the duty value of the ventilation fan motor 44 to step S.1. The ventilation fan motor 44 is driven by setting to Ds obtained in the process 4 (step S.5). At this time, the control unit 50 stores (substitutes and records) the duty value Ds of the ventilation fan motor 44 as the duty value Dm.

  Then, the controller 50 starts driving the ventilation fan motor 44 at the duty value Ds (= Dm) and after the first predetermined time, the rotation of the exhaust shutter 71 detected by the angle detection photointerrupter unit 66. The moving angle is detected for a second predetermined time, and the detected average turning angle is obtained as the turning angle Ak of the exhaust shutter 71 (step S.6).

  The rotation angle of the exhaust shutter 71 is obtained after the first predetermined time after the ventilation fan motor 44 starts to be driven with the duty value Ds (= Dm). The time until the rotation state of 43 and the rotation angle state of the exhaust shutter 71 are stabilized is taken into consideration. In addition, the average of the rotation angle of the exhaust shutter during the second predetermined time is obtained as the rotation angle Ak of the exhaust shutter 71. The exhaust shutter 71 does not stop at a fixed rotation angle but vibrates slightly. This is because the rotation angle Ak is detected in consideration of the fluctuation of the rotation angle due to the vibration because the tendency to maintain the state is high.

  Then, the control unit 50 calculates the duty difference between the duty value corresponding to the rotation angle At of the exhaust shutter 71 and the duty value corresponding to the rotation angle Ak of the exhaust shutter 71 from the graph R shown in FIG. ΔD is calculated (step S.7).

  The control unit 50 determines whether or not the calculated rotation angle Ak of the exhaust shutter 71 is larger than the rotation angle At of the exhaust shutter 71 corresponding to the set air volume (step S.8). In the case of Yes in S.8), the duty value Dm stored in the control unit 50 is subtracted and corrected by ΔD (step S.9). 50, the duty value Dm stored is added and corrected by ΔD (step S.10), and the ventilation fan motor 44 is driven with the newly calculated duty value Dm (step S.11).

  Then, the controller 50 takes the ventilation fan motor 44 into account for several seconds in consideration of the time until the driving state of the ventilation fan motor 44, the rotation state of the ventilation sirocco fan 43, and the rotation angle state of the exhaust shutter 71 are stabilized. After driving, the process proceeds to step S.P. 7, the rotation angle of the exhaust shutter detected by the angle detection photo-interrupter unit 66 is detected a plurality of times during the second predetermined time, and the detected average rotation angle is rotated by the rotation of the exhaust shutter 71. The angle Ak is obtained (step S.6). Thereafter, the control unit 50 repeatedly executes this process.

  As described above, step S.E. 5, the ventilation fan motor is driven only for the first predetermined time, so that the rotation angle of the exhaust shutter becomes gradually stable. After the first drive time, the average rotation angle in the second predetermined time is determined as the exhaust shutter. Since the rotation angle of the exhaust shutter 71 can be detected by detecting the rotation angle of the exhaust shutter 71, the rotation of the exhaust shutter 71 corresponding to the set duty value of the ventilation fan motor 44 can be detected. It becomes possible to accurately detect the angle.

  Further, the duty value of the ventilation fan motor 44 is newly calculated (addition correction / subtraction correction) based on the detected rotation angle of the exhaust shutter 71 (step S.8 to step S.10). Even in the case where the ventilation fan motor 44 is driven with the duty value (step S.11), after the ventilation fan motor 44 is driven for several seconds, the rotation angle of the exhaust shutter 71 is changed a plurality of times during the second predetermined time. By detecting, when the exhaust shutter 71 is stable with respect to the newly set duty value, the rotation angle of the exhaust shutter 71 can be detected, and the rotation angle of the exhaust shutter 71 is accurately detected. It becomes possible.

  Furthermore, the rotation angle of the exhaust shutter 71 is gradually brought closer to the angle corresponding to the set air volume (converged) by repeatedly performing the subtraction correction process (step S.9) and the addition correction process (step S.10). Therefore, finally, the exhaust air volume in the ventilation fan unit 41 can be controlled to the set air volume. For this reason, when the bathroom air conditioner 1 according to the present embodiment is used, outside air enters the room through the exhaust duct 5, and it is difficult to ensure a constant amount of exhaust air from the ventilation fan unit 41 due to the influence of the outside wind pressure. Even if it exists, it becomes possible to control the ventilation fan motor 44 so that the exhaust air volume in the ventilation fan unit 41 becomes the set air volume.

  As described above, in the bathroom air conditioner according to the present invention, since the exhaust air volume in the ventilation fan unit 41 is obtained by detecting the rotation angle of the exhaust shutter 71, the outside air temperature that changes the rotation speed of the ventilation fan, the outside The actual exhaust air volume can be obtained directly and accurately without being influenced by a plurality of factors such as wind pressure and motor temperature.

  Further, since the exhaust air volume can be obtained based on the rotation angle of the exhaust shutter 71, it is not necessary to detect the rotational speed of the ventilation sirocco fan, and the cost increase due to this configuration can be minimized. .

  In particular, when the rotation angle of the exhaust shutter 71 is detected, the ventilation fan motor 44 is driven at a predetermined duty value, and a predetermined time has elapsed, and the driving state of the ventilation fan motor 44 and the ventilation sirocco fan 43 are detected. Since the rotation angle of the exhaust shutter 71 is detected after the rotation state and the rotation angle state of the exhaust shutter 71 are stabilized, the rotation angle of the exhaust shutter 71 corresponding to the set duty value of the ventilation fan motor 44 is detected. Can be accurately detected.

  Further, after the control unit 50 detects the rotation angle of the exhaust shutter 71 a plurality of times during the second predetermined time, the control unit 50 obtains an average of the detected rotation angle detection values to drive at a predetermined duty value. Since the rotation angle of the exhaust shutter 71 corresponding to the exhaust air volume of the ventilation fan motor 44 is obtained, the exhaust shutter 71 does not stop at a constant rotation angle and vibrates slightly (a state that moves in small increments). However, it is possible to detect the rotation angle in consideration of the fluctuation of the rotation angle.

  Further, since the angle detection photo-interrupter unit 66 is used for detecting the rotation angle of the exhaust shutter 71, highly accurate angle detection can be performed with a simple configuration. Further, since the origin detection sensor unit is used in the origin detection process for detecting the rotation angle of the exhaust shutter 71, the origin detection is surely performed every time the exhaust fan 71 is rotated by driving the ventilation fan motor 44. Therefore, it is possible to improve the accuracy of detecting the rotation angle.

  As mentioned above, although it demonstrated in detail using the example which used the air blower concerning this invention as the bathroom air conditioner 1, the air blower concerning this invention is not limited to embodiment mentioned above. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  For example, in the present embodiment, encoder means such as the angle detection photo-interrupter unit 66 and the origin detection sensor unit 67 are used to detect the rotation angle of the exhaust shutter. However, the angle detection unit is not limited thereto. A potentiometer, a gyro sensor, or the like may be used instead.

  Further, in the above-described bathroom air conditioner, the circulation fan unit 21 and the ventilation fan unit 41 are provided independently. However, the circulation fan and the ventilation fan are configured as a single fan, and the air path switching unit is provided. The damper may be a structure that switches between a circulation air path and a ventilation air path, or that allows air to be blown to both air paths.

  Further, in the above-described embodiment, the case where the fan unit (circulation fan unit 21 and ventilation fan unit 41) in which the sirocco fan is unitized with the fan motor has been described, but the fan is not necessarily unitized. It is not limited to this, A fan, a motor, etc. may be comprised separately. In the embodiment, the case where a sirocco fan is used as a fan for blowing air has been described. However, the fan is not necessarily limited to a sirocco fan, and a multi-blade fan such as a radial fan is used. May be.

  In the above embodiment, the description has been made by showing the configuration in which the intake duct 7 is connected to the intake port 11 installed on the ceiling of the washroom 10, but the intake port 11 is not necessarily installed in the washroom 10. It is not limited and may be provided in another room or the like.

  In the above embodiment, a description has been given by showing a configuration in which only one intake duct 7 is connected to the main body case 3. However, the number of intake ducts 7 is not limited to one. A plurality may be provided connected to other side surfaces or the like.

It is a side view which shows a mode that the bathroom air conditioner which concerns on embodiment is installed in a bathroom. It is a perspective view which shows the bathroom air conditioner which concerns on embodiment. It is a bottom view which shows the main body case and circulation air-conditioning unit of the bathroom air conditioner which concern on embodiment. It is a side view which shows the AA cross section in FIG. It is a side view which shows the BB cross section in FIG. It is a disassembled perspective view which shows the structure of the exhaust duct connection part which concerns on embodiment. It is a side view which shows the state which the exhaust shutter rotated in the exhaust duct connection part which concerns on embodiment. It is the block diagram which showed the control structure of the control part which concerns on embodiment. It is the figure which showed the operation panel which concerns on embodiment. It is the flowchart which showed the process of the control part which concerns on embodiment. (A) is a graph showing the relationship between the duty value of the exhaust fan motor and the rotation angle of the exhaust shutter, and (b) is a graph showing the relationship between the set air volume and the duty value of the exhaust fan motor. is there.

Explanation of symbols

1 ... Bathroom air conditioner (blower)
2 ... Bathroom 2a ... Ceiling panel 3 ... Main body case 4 ... Front panel 4a ... Panel inlet 4b (Front panel) Panel outlet 5 ... Exhaust duct 6 ... Exhaust duct connection (duct connection)
7 ... Intake duct 8 ... Intake duct connection 10 ... Toilet 11 ... Inlet 12 ... Exhaust grill 13 ... Operation panel 14 ... Bathroom door 15 ... (Bathroom door) 16 ... Laundry pipe 17 ... Laundry 20 ... Circulation air conditioning Unit 21 ... circulation fan 22 ... ventilation passage 22a ... bottom opening 22b (of ventilation passage) upper opening 23 (of ventilation passage) circulation sirocco fan 23a ... main plate 23b (of circulation sirocco fan) ... Blade 24 (of circulation sirocco fan) ... Circulation fan motor 25 ... Circulation fan case 26 ... Heater 27 ... Circulation suction port 28 (of circulation fan case) ... Circulation outlet 40 (of circulation fan case) ... Ventilation air conditioning unit 41 ... Ventilation fan part 42 ... Circuit board part 43 ... Ventilation sirocco fan (rotary fan)
43a ... main plate 43b (of ventilation sirocco fan) ... wing 44 (of ventilation sirocco fan) ... ventilation fan motor (fan motor)
45 ... Ventilation fan case 46 ... Ventilation suction port 47 (of the ventilation fan case) ... Ventilation exhaust port 50 (of the ventilation fan case) ... Control part 51 (of the circuit board part) ... Recording part 55 (of the circuit board part) ... Connection Main body part 56 ... Connection main body case 57 ... Connection joint part 58 ... Connection edge part 60 ... Encoder box part (encoder means)
61 ... encoder shaft 62 ... first slit portion 62a ... slit circumferential portion 63 (of the first slit portion) ... second slit portion 63a ... slit circumferential portion 64 (of the second slit portion) ... encoder base 65 ... encoder box 65a ... Box body 65b ... Box cover 66 ... Photo interrupter for angle detection (angle detection means)
67 ... Origin detection sensor (origin detection means)
68 ... Spacer member 70 ... Exhaust shutter 71 ... Exhaust shutter (shutter means)
71a ... (exhaust shutter) shaft 72 ... exhaust shutter frame 72a ... (exhaust shutter frame) opening 73 ... shutter cushion 74 ... bearing member 75 ... storage hole 80 ... (operation panel) display part 81 ... (operation panel) 24 hour ventilation mode button 82 ... (operation panel) heating mode button 83 ... (operation panel) cool air mode button 84 ... (operation panel) ventilation mode button 85 ... (operation panel) drying mode button 86 ... ( Lamp 87 on the operation panel ... Timer button (on the operation panel)

Claims (2)

A rotating fan for exhausting the inhaled air to the outdoors,
A fan motor for rotating the rotary fan;
Control means for controlling drive of the fan motor;
A duct connecting portion for guiding the air exhausted by the rotation of the rotating fan to the outside,
In the duct connection portion, shutter means that opens and closes according to the air volume of the exhausted air,
Angle detecting means for detecting a rotation angle of the shutter means;
Origin detecting means for detecting the origin of the rotation angle detected by the angle detecting means;
Is provided ,
The control means detects a rotation angle of the shutter means a plurality of times in a predetermined time, determines an opening degree of the shutter means using an average value of the detected rotation angles, and determines the opening degree of the shutter means. An air blower characterized in that, based on the difference between the calculated exhaust air flow and a predetermined set air flow, drive control of the fan motor is performed. The blower according to claim 1, wherein the control unit detects a rotation angle of the shutter unit after driving the fan motor for a predetermined time with a predetermined drive control amount .

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