JPWO2016042696A1 - Ceiling fan - Google Patents

Abstract

A control unit (3) for controlling the DC motor (2) for rotating the blades is provided. Further, the control unit (3) includes a rotation number detection unit (6) that detects the rotation number of the DC motor (2), and a current detection unit (7) that detects a current value supplied to the DC motor (2). And a target rotational speed setting unit (12) for setting the target rotational speed of the DC motor (2). Further, a rotation speed control unit (9) for controlling the DC motor (2) so that the rotation speed detected by the rotation speed detection unit (6) becomes the target rotation speed, and a current value detected by the current detection unit (7). Is provided with a target rotational speed correction unit (8) for changing the target rotational speed so that is within a predetermined range. Since the DC motor (2) can operate at the set current value, the ceiling fan can be operated with a predetermined capacity regardless of the installation state from the ceiling.

Description

  The present invention relates to a ceiling fan using a DC motor.

  Conventionally, when a plurality of ceiling fans using this type of DC motor are installed in a place where the operation of the blades can be confirmed at once, there is a sense of discomfort to the user if there is a difference in the operation of the blades of the plurality of ceiling fans. For example, there is known one that controls the number of rotations of the blades of a plurality of ceiling fans to be constant (see, for example, Patent Document 1).

  Hereinafter, the ceiling fan will be described with reference to FIG.

  As shown in FIG. 4, the main part of the ceiling fan main body 101 includes a DC motor 103, a control unit 104, and a blade 105. The control unit 104 operates the DC motor 103 so that the blade 105 operates at a constant rotational speed. Control. A lighting 102 for illuminating the room is installed below the lower blade 105 of the ceiling fan main body 101.

  In a ceiling fan using such a conventional DC motor, a state where operation with an original predetermined capacity cannot be performed occurs depending on the installation state.

For example, when the ceiling fan of the same specification is installed in a state close to the ceiling (distance L ₁ ), and installed in a state of being separated from the ceiling to some extent (distance L _h ), the operation at the same rotational speed is performed. Compare.

As shown in FIG. 5A, when the vehicle is operated at the same number of revolutions, the capacity changes depending on the distance to the ceiling surface. That is, when the distance to the ceiling surface is large (L _h when it is far), power consumption is reduced when it is operated at the same rotational speed as compared with when the distance to the ceiling surface is small (L _l when it is close). In other words, the workload is reduced.

  Moreover, the rated capacity of the ceiling fan is determined by the power consumption due to restrictions such as temperature rise of components. Therefore, the rotational speed of the rated capacity, that is, the rated rotational speed is determined based on the power consumption in a state where the power consumption is high, that is, in a state where the power is installed at a predetermined distance relatively close to the ceiling.

For example, in the case of FIG. 5A, the power consumption 44W is set as the maximum power consumption. Then, the rated speed operation rotational speed when operated at power consumption 44W was installed at a predetermined distance L _l.

When the rated rotational speed is determined in this way, when operating at the rated rotational speed in the installation state (distance L _h ) far from the ceiling, the power consumption becomes 32 W as shown in FIG. There is room for constraints such as temperature rise of parts. Further, with respect to the rated value (output at a distance L _l), the output air volume is reduced.

FIG. 5B shows a ceiling fan in which a conventional ceiling fan installed in a state of installation far from the ceiling (distance L _h ) is installed at a predetermined distance L ₁ close to the ceiling shown in FIG. It is the figure which showed the wind speed and air volume at the time of making it operate | move with the same power consumption 44W. Both the wind speed and the air volume greatly exceed the operation at the power consumption of 44 W of the ceiling fan installed at a predetermined distance L ₁ close to the ceiling.

Japanese Patent No. 4649934

  As described above, the conventional ceiling fan has a problem that it cannot be operated with the capacity of the ceiling fan by the installation state, in particular, the installation distance from the ceiling.

  Therefore, the present invention provides a ceiling fan that can be operated with a predetermined capacity regardless of the installation distance from the ceiling.

  The ceiling fan includes a blade, a DC motor that rotates the blade, and a control unit that controls the DC motor. The control unit also includes a rotation number detection unit that detects the rotation number of the DC motor, a current detection unit that detects a current value supplied to the DC motor, and a target rotation number setting that sets a target rotation number of the DC motor. A part. In addition, a rotation speed control unit that controls the DC motor so that the rotation speed detected by the rotation speed detection unit becomes the target rotation speed, and a target rotation speed so that the current value detected by the current detection unit falls within a predetermined range. And a target rotational speed correction unit that performs the change.

  And according to this structure, a ceiling fan can be drive | operated by predetermined capability irrespective of the installation distance from a ceiling.

FIG. 1 is a configuration diagram showing a ceiling fan according to an embodiment of the present invention. FIG. 2 is a block circuit diagram of the ceiling fan according to the embodiment of the present invention. FIG. 3 is an explanatory diagram showing an operation pattern of the ceiling fan according to the embodiment of the present invention. FIG. 4 is a block diagram showing a conventional ceiling fan. FIG. 5 is a comparative diagram of performance in a conventional ceiling fan.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments are examples embodying the present invention, and do not limit the technical scope of the present invention. Moreover, the same code | symbol is attached | subjected about the same site | part through all drawings, and description is abbreviate | omitted. Furthermore, in each drawing, the description of the details of each part not directly related to the present invention is omitted.

(Embodiment)
As shown in FIG. 1, the ceiling fan body 1 according to the present embodiment includes a blade 4, a DC motor 2 that rotates the blade 4, and a control unit 3 that controls the DC motor 2. And in order to set the operation state of the ceiling fan body 1, a remote controller 5 capable of wireless communication can be used.

  The remote controller 5 has an air volume setting button for the user to operate the air volume from the ceiling fan main body 1, in other words, the rotational speed of the blades 4. In the present embodiment, the ceiling fan main body 1 can set three types of airflows of “strong”, “medium”, and “weak”, and the remote controller 5 includes buttons corresponding to each. “Strong” indicates the maximum air volume blown by the ceiling fan body 1, and “Low” indicates the minimum air volume blown by the ceiling fan body 1. “Medium” indicates an intermediate air volume between “strong” and “weak”. The maximum air volume can be an air volume that can be blown at the rated rotational speed set in the ceiling fan body 1.

  As shown in FIG. 2, the control unit 3 is a microcomputer, and the control unit 3 is connected to the DC motor 2 in a controllable manner. The control unit 3 includes a rotation number detection unit 6, a current detection unit 7, a target rotation number correction unit 8, a rotation number control unit 9, a signal determination unit 10, an air volume setting unit 11, and a target rotation number setting unit. 12 and a memory 13.

  The rotation speed detection unit 6 detects a rotation speed of the DC motor 2 by counting a rotation detection signal (FG) that is a signal from a hall sensor that is a position detection element installed in the DC motor 2.

  The current detection unit 7 detects a current value that is applied to the DC motor 2.

  The signal determination unit 10 receives a signal from the remote controller 5 and analyzes the content of the signal. Examples of the signal type include “power ON”, “power OFF”, “strong” setting, “medium” setting, “weak” setting, and the like.

  The air volume setting unit 11 sets the air volume to be generated from the blades 4 connected to the DC motor 2 as the set air volume based on the result analyzed by the signal determination unit 10. This set air volume corresponds to, for example, the above-mentioned “strong” indicating the air volume. The set air volume set is stored in the memory 13, for example.

  The target rotational speed setting unit 12 determines a target rotational speed corresponding to the set air volume set by the air volume setting unit 11. Here, the target rotational speed corresponding to the set air volume is the rotational speed at which the blades 4 are required to blow the set air volume. The determination of the target rotational speed is performed as follows, for example. The set air volume and the rotation speed of the blades 4 necessary for blowing (realizing) the set air volume are associated in advance and stored in the memory 13 as an air volume rotation speed table. The target rotation speed setting unit 12 acquires the set air volume set by the air volume setting unit 11, and acquires the rotation speed of the blade 4 corresponding to the acquired set air volume from the air volume rotation speed table stored in the memory 13. Thereby, the target rotational speed is determined. The determined target rotational speed is stored in the memory 13, for example.

  The rotational speed control unit 9 compares the target rotational speed set by the target rotational speed setting unit 12 with the rotational speed detected by the rotational speed detection unit 6 when the ceiling fan main body 1 starts to be driven. Then, an output instruction for increasing the rotational speed is given to the DC motor 2 until the target rotational speed is reached. An output instruction for increasing or decreasing the rotational speed is also given to the target rotational speed corrected by the target rotational speed correcting unit 8, which will be described in detail later.

  The target rotational speed correction unit 8 corrects the target rotational speed by comparing the current value detected by the current detection unit 7 with a set predetermined current value. The correction of the target rotational speed is performed as follows, for example. The preset air volume, the minimum current value corresponding to the set air volume, and the maximum current value corresponding to the set air volume are associated with each other and stored in the memory 13 as an air volume current table. The target rotation speed correction unit 8 acquires the set air volume set by the air volume setting unit 11, and acquires the minimum current value and the maximum current value corresponding to the acquired set air volume from the air volume current table. The acquired minimum current value is set as the lower limit of the predetermined range, and the maximum current value is set as the upper limit of the predetermined range. Thereby, the predetermined range (current value range) of the current value is determined.

  Then, the target rotation speed correction unit 8 determines whether or not the current value acquired from the current detection unit 7 is in the current value range. When the current value is within the current value range, the target rotational speed is not corrected. On the other hand, when the current value acquired from the current detection unit 7 is larger than the current value range, the target rotational speed is made smaller than the current value at a predetermined rate. Further, when the current value acquired from the current detection unit 7 is smaller than the current value range, the target rotational speed is made larger than the current value at a predetermined rate. As a result, the target rotational speed is corrected. The corrected target rotational speed is stored in the memory 13, for example.

  In this configuration, the operation of the ceiling fan body 1 of the present embodiment will be described.

  When the user starts operation by operating the remote controller 5, the signal determination unit 10 analyzes the signal from the remote controller. The analyzed result is stored in the memory 13.

  The air volume setting unit 11 receives the result of analysis via the memory 13, and when it is “power ON”, the control unit 3 starts the operation of the ceiling fan main body 1 and sets a preset operation start time. The target air volume (hereinafter referred to as initial target air volume) is transmitted to the air volume setting unit 11 via the memory 13 as the set air volume. Also, when the analyzed signal is “strong”, “medium”, and “weak”, the similarly analyzed result is transmitted to the air volume setting unit 11 via the memory 13.

  Here, it is assumed that “power ON” is received and “strong” that is the initial target set air volume is the set air volume.

  When the air volume setting unit 11 receives “Power ON” from the signal determination unit 10 via the memory 13, the air volume setting “High” is transmitted to the target rotation number setting unit 12 via the memory 13 as the set air volume.

  The target rotational speed setting unit 12 receives the set air volume “strong” from the air volume setting unit 11 and determines a target rotational speed corresponding to “strong”. Here, the target rotational speed is, for example, “100 rpm” based on the air volume rotational speed table.

  The rotation speed control unit 9 controls to increase the rotation speed of the DC motor so that the rotation speed of the DC motor 2 detected by the rotation speed detection unit 6 becomes the target rotation speed “100 rpm”.

  The rotational speed control unit 9 determines whether the rotational speed from the rotational speed detection unit 6 has reached the target rotational speed at predetermined time intervals. When the rotational speed of the DC motor 2 reaches “100 rpm”, the rotational speed control unit 9 transmits an arrival signal indicating that the rotational speed has been reached to the target rotational speed correction unit 8.

  When the target rotational speed correction unit 8 receives the arrival signal, the target rotational speed correction unit 8 performs the following target rotational speed correction process.

  Next, each operation pattern in the target rotation speed correction process will be described with reference to FIG.

  The operation pattern P1 shown in FIG. 3A shows a case where the current value of the DC motor 2 is within the set current value range when the arrival signal is received (point X in FIG. 3A). Yes. That is, the target rotation speed correction unit 8 determines whether or not the current value acquired from the current detection unit 7 is within the current value range, and corrects the target rotation speed because the current value is within the current value range. do not do. That is, the target rotational speed correction unit 8 continues the operation while maintaining the target rotational speed without changing the target rotational speed.

  In this example, the set air volume is “strong”, that is, the highest capacity of the ceiling fan body 1 is required. In the operation pattern P1, the current flows through the DC motor 2 in the current value range corresponding to “strong”. That is, the ceiling fan main body 1 can exhibit a predetermined ability without having a surplus.

  Next, the operation pattern P2 shown in FIG. The operation pattern P2 shows a case where the current value of the DC motor 2 is below the set current value range when the arrival signal is received (point X in (b)). That is, the target rotation speed correction unit 8 determines whether or not the current value acquired from the current detection unit 7 is in the current value range, and determines that the current value is smaller than the current value range, that is, the minimum current value. Yes. In this case, the target rotational speed correction unit 8 changes the target rotational speed at a predetermined rate to be larger than the current value. This change is transmitted to the rotation speed control unit 9 via the memory 13 as described above. The rotation speed control unit 9 increases the rotation speed of the DC motor 2 based on the changed target rotation speed.

  The target rotational speed correction unit 8 sets the target rotational speed to a constant rotational speed until the current value of the DC motor 2 detected by the current detection unit 7 reaches the set current value range at regular time intervals, for example, every 8 seconds. It will increase gradually. In the operation pattern P2 shown in FIG. 3B, the target rotational speed correction unit 8 continuously increases the target rotational speed over three times, point X1, point X2, and point X3. At point X4, the target rotation speed correction unit 8 determines whether or not the current value acquired from the current detection unit 7 is within the current value range, and determines that the current value is within the current value range. The target rotational speed is not corrected. That is, the target rotational speed correction unit 8 continues to operate without changing the target rotational speed at the point X4.

  In this example, the set air volume is “strong”, that is, the highest capacity of the ceiling fan body 1 is required. In the operation pattern P2, no current flows through the DC motor 2 in the current value range corresponding to “strong”. That is, since the ceiling fan main body 1 has a surplus power at the point X, the predetermined ability, that is, the maximum ability can be exhibited at the point X4 by correcting the target rotational speed described above.

  Next, the operation pattern P3 shown in FIG. The operation pattern P3 is a case where the rotational speed of the DC motor 2 exceeds the range of the current value set before reaching the target rotational speed.

  Whether or not the target rotation speed correction unit 8 always exceeds the upper limit of the set current range, that is, the maximum current value, with respect to the current value from the current detection unit 7 even before the arrival signal is received. Determine. In the operation pattern P3, the target rotation speed correction unit 8 determines (detects) that the maximum current value has been exceeded at the point Y that has not reached the target rotation speed.

  In this case, the target rotational speed correction unit 8 decreases the target rotational speed by a constant rotational speed so that the current value of the DC motor 2 detected by the current detection unit 7 falls within the set current value range.

  Thereafter, the target rotational speed correction unit 8 keeps the target rotational speed constant every predetermined time, for example, every 8 seconds, until the current value of the DC motor 2 detected by the current detection unit 7 reaches the set current value range. Decreases by the number of revolutions.

  In the operation pattern P3 shown in FIG. 3C, the target rotational speed correction unit 8 continuously decreases the target rotational speed over two times at points Y1 and Y2. At point Y3, the target rotation speed correction unit 8 determines whether or not the current value acquired from the current detection unit 7 is within the current value range, and determines that the current value is within the current value range. The target rotational speed correction unit 8 does not correct the target rotational speed. In other words, the target rotation speed correction unit 8 continues to operate without changing the target rotation speed at the point Y3.

  For example, such a state may occur when the ceiling fan main body 1 is installed at a distance shorter than the minimum installation distance from the assumed ceiling. In such a case, the DC motor 2 may be overloaded and damaged. By the control shown in (c), it is possible to prevent such operation of the DC motor 2 in an overload state.

  The above is the processing when the set air volume is “strong”, but the same processing is performed even when the air volume is “medium” or “weak”. Naturally, in the current value range, both “maximum” and “minimum” current values are smaller at “medium” than “strong” and “weak” than “medium”.

  Further, switching from “strong” to “medium” or “weak” can also be handled by the above-described processing.

  As described above, by performing the target rotational speed correction process, the ceiling fan main body 1 can operate the power consumption of the DC motor 2 that is the product of the energization current and the energization voltage within a set range. That is, since the ceiling fan body 1 is operated with the set power consumption, it is possible to obtain an effect that the ceiling fan body 1 can be operated with a predetermined ability regardless of the installation state from the ceiling.

  In addition, you may limit the setting air volume which implements correction | amendment of the target rotation speed by an electric current value only to the maximum air volume. When the user selects “weak” or “medium” using the remote controller 5, the target rotational speed is not corrected by the current value, and the control is performed at a constant rotational speed. On the other hand, only when the maximum air volume “strong” is set, the target rotational speed is corrected by the current value, and control is performed so that the current value of the DC motor 2 falls within the set current value range.

  By adopting such control, when the set air volume is other than the maximum air volume, the motor is operated at a constant speed, and the target speed is corrected by the current value only when the maximum air volume is set. Is possible. That is, when the set air volume is other than the maximum air volume, the operation is performed without giving a sense of incongruity due to the difference in the number of rotations when a plurality of units are set as in the conventional ceiling fan. Only when the “maximum” of the maximum air volume is selected, it is possible to obtain the effect of being able to drive with a predetermined ability, giving priority to the ability over the feeling of use.

  As described above, the ceiling fan according to the embodiment of the present invention includes a blade, a DC motor that rotates the blade, and a control unit that controls the DC motor. The control unit also includes a rotation number detection unit that detects the rotation number of the DC motor, a current detection unit that detects a current value supplied to the DC motor, and a target rotation number setting that sets a target rotation number of the DC motor. A part. Further, the control unit controls the DC motor so that the rotation number detected by the rotation number detection unit becomes the target rotation number, and the current value detected by the current detection unit falls within a predetermined range. A target rotational speed correction unit that changes the target rotational speed.

  As a result, the target rotational speed correction unit corrects the target rotational speed so that the current value supplied to the DC motor is within the set current value range, and the DC motor control unit is detected by the rotational speed detection unit. Control is performed so that the rotation speed of the DC motor is the target rotation speed corrected by the target rotation speed correction unit. That is, since the DC motor is controlled so that the current value supplied to the DC motor falls within the set current value range, the effect of being able to operate with a predetermined capacity regardless of the installation state from the ceiling is obtained. It is done.

  Further, an air volume setting unit that receives the setting of the air volume from the user is provided, the target rotation speed setting unit determines a target rotation speed corresponding to the set air volume set by the air volume setting unit, and the target rotation speed correction unit The configuration may be such that the target rotational speed is corrected when the air volume set by the air volume setting unit is the maximum air volume setting.

  As a result, when the set air volume is other than the maximum air volume, the engine is operated at a constant rotation speed, and only when the maximum air volume is set, the target rotation speed is corrected based on the current value of the DC motor. . That is, when the set air volume is other than the maximum air volume, unlike the conventional ceiling fan, there is no sense of incongruity due to the difference in the number of rotations when a plurality of units are set. And when the maximum air volume which requires capability is set, the effect that it can drive | operate with a predetermined capability is acquired.

  The rotation speed control unit determines that the rotation speed detected by the rotation speed detection unit has reached the target rotation speed, and transmits arrival information indicating that the rotation speed has reached the target rotation speed. A correction | amendment part is good also as a structure which starts the process for the change of target rotation speed after receiving arrival information.

  This prevents the target rotational speed from being corrected during the rotational speed increasing process when the power is turned on, and the rotational speed can be easily controlled.

  Further, the air volume current table serving as a reference for changing the target rotational speed may be a table in which the set air volume, the minimum current value corresponding to the set air volume, and the maximum current value corresponding to the set air volume are associated with each other.

  By providing the current value for correcting the target rotational speed as a range from the minimum value to the maximum value, the rotation of the DC motor can be maintained more smoothly than when the current value is determined at a single point.

  The ceiling fan according to the present invention is useful as a ceiling fan that can be operated with a predetermined capacity regardless of the installation state from the ceiling.

DESCRIPTION OF SYMBOLS 1,101 Ceiling fan main body 2,103 DC motor 3,104 Control part 4,105 Blade 5 Remote controller 6 Rotational speed detection part 7 Current detection part 8 Target rotational speed correction part 9 Rotational speed control part 10 Signal judgment part 11 Air volume setting Section 12 Target rotational speed setting section 13 Memory 102 Illumination

Claims (13)

Feathers,
A DC motor for rotating the blade;
A control unit for controlling the DC motor,
The controller is
A rotational speed detector for detecting the rotational speed of the DC motor;
A current detector for detecting a current value energized in the DC motor;
A target rotational speed setting unit for setting a target rotational speed of the DC motor;
A rotational speed control unit that controls the DC motor so that the rotational speed detected by the rotational speed detection unit becomes the target rotational speed;
A target rotational speed correction unit that changes the target rotational speed so that the current value detected by the current detection unit falls within a predetermined range;
Ceiling fan with It has an air volume setting unit that receives air volume settings from users,
The target rotation speed setting unit is
Determining a target rotational speed corresponding to the set air volume set by the air volume setting unit;
The target rotational speed correction unit is
The ceiling fan according to claim 1, wherein the target rotational speed is corrected when the air volume set by the air volume setting unit is a maximum air volume setting. The rotation speed control unit
Determining whether the rotational speed detected by the rotational speed detector reaches the target rotational speed,
When reaching the target rotational speed, the arrival information indicating that it has been reached is transmitted,
The target rotational speed correction unit is
The ceiling fan according to any one of claims 1 and 2, wherein a process for changing the target rotational speed is started after receiving the arrival information. The target rotational speed correction unit is
Compare the current value from the current detection unit with the preset upper limit value of the predetermined range,
The ceiling fan according to any one of claims 1 and 2, wherein a process for changing the target rotational speed is started when a current value from the current detection unit exceeds the upper limit value. The controller is
An air volume rotation speed table for storing the set air volume and the rotation speed corresponding to the set air volume in association with each other;
The target rotation speed setting unit is
The ceiling fan according to claim 2, wherein the target rotational speed is determined based on a set air volume set by the air volume setting unit and the air volume rotation speed table. The controller is
An air volume rotation speed table for storing the set air volume and the rotation speed corresponding to the set air volume in association with each other;
The target rotation speed setting unit is
The ceiling fan according to claim 3, wherein the target rotational speed is determined based on a set air volume set by the air volume setting unit and the air volume rotation speed table. The controller is
An air volume rotation speed table for storing the set air volume and the rotation speed corresponding to the set air volume in association with each other;
The target rotation speed setting unit is
The ceiling fan according to claim 4, wherein the target rotation speed is determined based on a set air volume set by the air volume setting unit and the air volume rotation speed table. The controller is
An air volume current table for storing a set air volume and a current value corresponding to the set air volume in association with each other;
The target rotational speed correction unit is
The ceiling fan according to claim 2, wherein a range of a current value serving as a reference for correcting the target rotational speed is determined based on a set air volume set by the air volume setting unit and the air volume current table. The controller is
An air volume current table for storing a set air volume and a current value corresponding to the set air volume in association with each other;
The target rotational speed correction unit is
The ceiling fan according to claim 3, wherein a range of a current value that serves as a reference for correcting the target rotational speed is determined based on a set air volume set by the air volume setting unit and the air volume current table. The controller is
An air volume current table for storing a set air volume and a current value corresponding to the set air volume in association with each other;
The target rotational speed correction unit is
The ceiling fan according to claim 4, wherein a range of a current value serving as a reference for correcting the target rotational speed is determined based on a set air volume set by the air volume setting unit and the air volume current table. The airflow current table is
The ceiling fan according to claim 8, wherein the set air volume, the minimum current value corresponding to the set air volume, and the maximum current value corresponding to the set air volume are stored in association with each other. The airflow current table is
The ceiling fan according to claim 9, wherein a set air volume, a minimum current value corresponding to the set air volume, and a maximum current value corresponding to the set air volume are stored in association with each other. The airflow current table is
The ceiling fan according to claim 10, wherein a set air volume, a minimum current value corresponding to the set air volume, and a maximum current value corresponding to the set air volume are stored in association with each other.

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