JP2006207880A - Ventilating fan - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilating fan capable of arbitrarily setting the optimum operating state and implementing and keeping the instructed operation by flexibly coping with the change of pressure loss. <P>SOLUTION: This ventilating fan comprises a DC motor 2 loaded on a ventilating fan main body 1, a voltage control means 16 for controlling the applied power source voltage, a rotational frequency detecting means 9 for detecting the rotational frequency of the DC motor 2, a voltage detecting means 17 for detecting the power source voltage applied to the DC motor 2, a drive controlling means 8 for exciting and driving a winding of the DC motor 2, and a rotational frequency instructing means 11 for instructing the rotational frequency of the DC motor 2. A rotational frequency storing means 13 for storing the rotational frequency in advance to each applied voltage, of the DC motor 2 operated by the instructed rotational frequency, and a multistage operation switch 6 for setting the rotational frequency of the DC motor 2, are mounted on a main body control portion, and the voltage control means 16 controls the applied voltage of the DC motor 2 so that the operation rotational frequency detected by the rotational frequency detecting means 9 is agreed with the rotational frequency set by the multistage operation switch 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a ventilator equipped with a DC motor that keeps cleanliness in a building by ventilating dirty air in a room in a house or the like.

  In recent years, planned ventilation has been recommended due to revisions to the Building Standards Act. For range hoods and ceiling-mounted ventilation devices, etc., motor efficiency increases, duct piping configuration, outside wind pressure, pressure loss due to filter clogging There is a need for a ventilator that can be ventilated with an optimal air volume in accordance with cooking conditions and living room conditions without being affected by changes in the temperature.

  Various ventilators of this type have already been invented, but it is known that even if the pressure loss due to the duct changes, it is possible to operate with the specified constant air flow without using a special sensor ( For example, Patent Document 1).

In addition, a highly simple ventilation device that can switch the air volume of the blower between two levels of strength and weakness by means of a control switch, so that both of the two levels of air volume can be changed and the convenience is further improved ( For example, Patent Document 2).
JP-A-5-146189 JP 2004-263949 A

  In such a conventional ventilator, it maintains a preset air volume corresponding to changes in pressure loss due to the influence of duct piping form, external air pressure, filter clogging, etc. The problem that static pressure cannot be selected was also assumed.

  Furthermore, since the air volume in both the strong and weak phases is changed, the air volume setting range for both strong and weak is narrowed, and the problem that the air volume setting is complicated for the user during or after construction is also assumed. .

  The present invention solves the above problems, and allows the user to arbitrarily set the optimum operating state during construction and after construction according to installation conditions and living room conditions. The objective is to perform and maintain the target operation instructed flexibly in response to changes in pressure loss caused by the factors.

  In order to solve the above problems, a ventilation fan according to the present invention detects a rotational speed of a DC motor mounted on a ventilation fan body, voltage control means for controlling the voltage of a power source applied to the DC motor, and the rotational speed of the DC motor. Rotational speed detection means for detecting the voltage applied to the DC motor, drive control means for exciting and driving the winding of the DC motor, and rotation for instructing the rotational speed of the DC motor Rotational speed storage means for storing in advance the rotational speed at each applied voltage of the DC motor for operating at the specified rotational speed with the numerical instruction means, and can be operated from outside the ventilation fan body to set the rotational speed of the DC motor A multi-stage operation switch is provided in the main body control unit so that the operation rotation speed detected by the rotation speed detection means is the same as the target rotation speed set by the multi-stage operation switch. Pressure control means and controlling the DC voltage applied to the motor.

  The ventilation fan of the present invention is characterized in that an operation switch for setting the rotation speed of the DC motor is a stepless switch, and the target rotation speed set by the stepless switch is displayed on a display unit provided in the ventilation fan body. To do.

  The ventilating fan of the present invention is characterized in that when the operating rotational speed of the DC motor coincides with the target rotational speed set by the operation switch, it is displayed on a display unit provided in the main body of the ventilating fan.

  The ventilating fan of the present invention is characterized in that the current operating rotational speed detected by the DC motor rotational speed detecting means and the target rotational speed set by the operation switch are displayed on a display unit provided in the ventilation fan main body.

  The ventilating fan of the present invention includes an air volume storage means for storing in advance an operation air volume determined by each applied voltage applied to the DC motor and the rotational speed of the DC motor, and a current operation detected by the rotational speed detection means. Multi-stage operation switch that can be operated from the outside of the ventilation fan main body to set the rotational speed, the current applied voltage detected by the voltage detection means and the current air volume from the air volume storage means, and the DC motor air volume Is provided in the main body control unit, and the rotational speed instruction means selects the rotational speed necessary for operation with the target air volume set by the multi-stage operation switch from the air volume storage means, and the rotational speed detection The voltage control means controls the DC motor applied voltage so that the operating rotational speed detected by the means becomes the same rotational speed as the target rotational speed instructed by the rotational speed instruction means. And wherein the Rukoto.

  The ventilation fan of the present invention is characterized in that the operation switch for setting the air volume of the DC motor is a stepless switch, and the target air volume set by the stepless switch is displayed on a display unit provided in the ventilation fan body.

  The ventilating fan of the present invention is characterized in that when the current operating airflow detected by the airflow detecting means coincides with the target airflow set by the operation switch, it is displayed on a display unit provided in the main body of the ventilating fan.

  The ventilation fan of the present invention is characterized in that the current operation air volume detected by the air volume detection means and the target air volume set by the operation switch are displayed on a display unit provided in the ventilation fan body.

  The ventilation fan of the present invention is detected by a static pressure storage means for storing the static pressure applied to the DC motor determined by each applied voltage applied to the DC motor and the rotation speed of the DC motor, and a rotation speed detection means. A static pressure detecting means for detecting a current applied pressure detected by the voltage detecting means, a static pressure applied to the current DC motor from the static pressure storage means, and a static pressure applied to the DC motor. A multi-stage operation switch that can be operated from outside the main body of the ventilation fan for setting is provided in the main body control unit, and the number of revolutions necessary for operation at the target static pressure set by the multi-stage operation switch is rotated from the static pressure storage means. The number instruction means is selected as a target rotation speed, and the operating rotation speed detected by the rotation speed detection means is a voltage that is the same as the target rotation speed indicated by the rotation speed instruction means. Control means and controlling the DC voltage applied to the motor.

  The ventilation fan of the present invention uses a stepless switch as an operation switch for setting the static pressure applied to the DC motor during operation of the DC motor, and displays the target static pressure set by the stepless switch on the display unit provided in the ventilation fan body. It is characterized by doing.

  The ventilation fan of the present invention displays on the display unit provided in the ventilation fan main body when the static pressure applied to the DC motor detected by the static pressure detection means coincides with the target static pressure set by the operation switch. It is characterized by that.

  Further, the ventilation fan of the present invention displays the current static pressure detected by the static pressure detection means and the target static pressure set by the multi-stage operation switch operable from the outside of the ventilation fan body on a display unit provided on the ventilation fan body. It is characterized by.

  The ventilating fan of the present invention is provided with a current detection means for detecting the current flowing through the DC motor and a power detection means for calculating the power consumed by the DC motor in the main body control unit, and the voltage detection means, the current detection means, and the power detection means. The detected voltage, current, and consumed power applied to the DC motor are displayed on a display unit provided in the ventilation fan body.

  In the ventilator of the present invention, the maximum and minimum values of static pressure that can satisfy the performance of the DC motor are stored in advance in the storage means, and the static pressure during operation deviates from the maximum and minimum values. An abnormality is notified to a display unit provided in the main body of the ventilation fan.

  As described above, according to the ventilation fan of the present invention, it is possible for the user to arbitrarily set the optimum operation state during the construction and after the construction according to the installation state and the room condition, and various external It can be aimed to perform and maintain a target operation instructed flexibly in response to a change in pressure loss caused by a factor.

  According to a first aspect of the present invention, there is provided a ventilating fan comprising: a DC motor mounted on the ventilating fan body; voltage control means for controlling the voltage of a power source applied to the DC motor; and rotation for detecting the rotational speed of the DC motor. Number detection means, voltage detection means for detecting a voltage applied to the DC motor, drive control means for exciting and driving the winding of the DC motor, and rotation speed instruction means for instructing the rotation speed of the DC motor And a multi-stage operation that can be operated from outside the main body of the ventilation fan in order to set the rotation speed of the DC motor. A switch is provided in the main body control unit, and the voltage control means so that the operating rotational speed detected by the rotational speed detecting means becomes the same rotational speed as the target rotational speed set by the multistage operation switch. It is characterized by controlling the DC motor applied voltage. In order to make the number of revolutions of the DC motor coincide with the target set value set by the operation switch, the optimum applied voltage of the DC motor is controlled. It is possible to set the operation to generate the rotation speed, generate the target rotation speed instructed flexibly in response to changes in pressure loss due to various external factors, and perform the operation to keep it constant. .

  The ventilator fan according to claim 2 is the ventilator fan according to claim 1, wherein the operation switch for setting the rotation speed of the DC motor is a stepless switch, and the target rotation speed set by the stepless switch is set as the main body of the ventilation fan. It is characterized by being displayed on the display unit provided in, and since it has a stepless switch and a display unit that can check the set value, it is more detailed according to various conditions such as installation status, living room, etc. The operation that generates the optimum number of revolutions can be set more easily while checking the content displayed on the display unit.

  According to a third aspect of the present invention, in the ventilating fan according to the first or second aspect, the display unit provided in the main body of the ventilating fan when the operation speed of the DC motor matches the target speed set by the operation switch. A display unit is provided that can notify when the actual operation content matches the target set value as a result of constantly comparing and adjusting the actual operation status against the target set value. Therefore, it can be easily determined whether the device satisfies the set operation with respect to the target set value.

  According to a fourth aspect of the present invention, in the ventilating fan according to any one of the first to third aspects, the current operating rotational speed detected by the DC motor rotational speed detecting means and the target rotational speed set by the operation switch. Is displayed on a display unit provided on the main body of the ventilation fan, and a display unit capable of notifying the set value and the progress of the adjustment control by constantly comparing the actual driving situation with respect to the target set value. Since it is provided, it is possible to easily discriminate between the target set value, the operation status of the device corresponding to the target set value, and the difference with respect to the target set value.

  According to a fifth aspect of the present invention, there is provided a ventilating fan according to the first aspect, wherein the ventilating fan according to the first aspect stores an air volume storage means for preliminarily storing an operating air volume determined by each applied voltage applied to the DC motor and the rotational speed of the DC motor. The current operating rotational speed detected by the rotational speed detecting means, the current applied voltage detected by the voltage detecting means, the air volume detecting means for detecting the current air volume from the air volume storing means, and the air volume of the DC motor are set. A multi-stage operation switch that can be operated from outside the main body of the ventilating fan is provided in the main body control unit, and the rotation speed instruction means indicates the number of rotations required for operation with the target air volume set by the multi-stage operation switch from the air volume storage means Is selected as the target rotational speed, and the operating rotational speed detected by the rotational speed detecting means becomes the same rotational speed as the target rotational speed instructed by the rotational speed instructing means. The voltage control means controls the DC motor applied voltage. In order to make the air volume of the DC motor coincide with the target set value set by the operation switch, the applied voltage of the DC motor is appropriately controlled. It is possible to set the operation to generate the optimal air volume, generate the target air volume instructed flexibly in response to changes in pressure loss due to various external factors, and perform the operation to keep it constant. it can.

  The invention of the ventilation fan according to claim 6 is the ventilation fan according to claim 5, wherein the operation switch for setting the air volume of the DC motor is a stepless switch, and the target airflow set by the stepless switch is provided in the ventilation fan body. It is characterized by displaying on the display part, and since it has a stepless switch and a display part that can check the set value, it can be rotated more optimally in more detail according to various conditions such as installation status, living room, etc. The operation that generates the number can be set more easily while confirming the content displayed on the display unit.

  According to a seventh aspect of the present invention, there is provided the ventilating fan according to the fifth or sixth aspect, wherein when the current operating airflow detected by the airflow detecting means coincides with the target airflow set by the operation switch, It is characterized by displaying on the display unit, and it is possible to notify when the actual operation content matches the target set value as a result of constantly comparing and adjusting the actual driving situation against the target set value. Since the display unit is provided, it can be easily determined whether the device satisfies the set operation with respect to the target set value.

  The ventilator fan according to claim 8 is the ventilator fan according to any one of claims 5 to 7, wherein a current operating airflow detected by the airflow detecting means and a target airflow set by the operation switch are provided in the main body of the exhaust fan. It is characterized in that it is displayed on the display unit, and since a display unit that can notify the progress of the adjustment control by constantly comparing the actual driving situation with respect to the set value and the target set value, It is possible to easily discriminate between the target set value and the operation status of the device corresponding to the target set value and the difference with respect to the target set value.

  A ventilator according to a ninth aspect of the present invention is the ventilator according to the fifth aspect, wherein the static fan for storing the static pressure applied to the DC motor determined by each applied voltage applied to the DC motor and the rotational speed of the DC motor. A static memory for detecting the current operating rotational speed detected by the pressure storage means, the rotational speed detection means, the current applied voltage detected by the voltage detection means, and the static pressure applied to the current DC motor from the static pressure storage means; A multi-stage operation switch that can be operated from the outside of the ventilation fan main body to set a static pressure applied to the DC motor is provided in the main body control unit, and a target static pressure set by the multi-stage operation switch from the static pressure storage means is provided. The rotation speed instruction means selects the rotation speed necessary for operating at a pressure as the target rotation speed, and indicates the operation rotation speed detected by the rotation speed detection means by the rotation speed instruction means. The voltage control means controls the DC motor applied voltage so that the rotational speed is the same as the target rotational speed, and makes the static pressure of the DC motor coincide with the target set value set by the operation switch. Therefore, by appropriately controlling the applied voltage of the DC motor, it is possible to set the operation to generate the optimum static pressure, and the target is instructed flexibly in response to changes in pressure loss due to various external factors. An operation can be performed in which static pressure is generated and kept constant.

  The invention of the ventilator according to claim 10 is the ventilator according to claim 9, wherein the operation switch for setting the static pressure applied to the DC motor during DC motor operation is a stepless switch, and the target set by the stepless switch. It is characterized by displaying static pressure on the display unit provided on the main body of the ventilation fan, and since it has a stepless switch and a display unit that can check the set value, it can be used according to various conditions such as installation state, room etc. Thus, it is possible to more easily set the operation for generating the optimum rotational speed in more detail while confirming the content displayed on the display unit.

  The invention of a ventilator according to claim 11 is the ventilator according to claim 9 or 10, wherein the static pressure applied to the DC motor during the DC motor operation detected by the static pressure detecting means is the target static pressure set by the operation switch. When it matches, it is displayed on the display unit provided on the main body of the ventilation fan, and the actual operation content matches the target set value as a result of constantly comparing and adjusting the actual operation status against the target set value. In this case, since a display unit that can be notified is provided, it is possible to easily determine whether the device satisfies the set operation with respect to the target set value.

  The invention of the ventilator according to claim 12 is set in the ventilator according to any one of claims 9 to 11 by the current static pressure detected by the static pressure detecting means and an operation switch operable from outside the ventilator main body. The target static pressure is displayed on the display unit provided on the main body of the ventilation fan, and it is possible to notify the set value and the progress of the adjustment control by always comparing the actual driving situation against the target set value. Since the display unit is provided, it is possible to easily discriminate between the target set value, the operation status of the device corresponding to the target set value, and the difference with respect to the target set value.

  The invention of the ventilating fan according to claim 13 is the ventilating fan according to any one of claims 9 to 12, wherein the current detecting means for detecting the current flowing through the DC motor and the power detecting means for calculating the power consumed by the DC motor are provided in the main body. Provided in the control unit, the voltage, current, and power applied to the DC motor detected by the voltage detection unit, current detection unit, and power detection unit are displayed on a display unit provided in the ventilation fan body. Since a display unit is provided that can detect and determine the applied voltage and current of the DC motor and notify the contents of the DC motor at any time, it can be used together with the operation status of the device and the air condition of the target room. Therefore, it is possible to determine and select a more energy efficient driving method.

  According to a fourteenth aspect of the present invention, in the ventilating fan according to any one of the first to twelfth aspects, the maximum and minimum static pressures that can satisfy the performance of the DC motor are stored in the storage means in advance. In addition, when the static pressure during operation deviates from the maximum value and the minimum value, the display unit provided in the main body of the ventilation fan is notified of abnormality, and the conditions under normal static pressure are stored, It is possible to easily determine that there is a problem in the duct piping form, the external wind pressure, the living room situation, the filter clogging, etc. by always making a comparison with the operating state.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

(Embodiment 1)
As shown in FIGS. 1 and 2, the ventilation fan body 1 is equipped with a DC motor 2, its discharge port 3 is connected to a duct 4, and the duct 4 is caused by cigarette smoke sucked by the ventilation fan body 1 or waste gas from cooking. The contaminated room air is provided so as to pass through the wall 5 of the building and to be guided outside the room. In addition, the ventilation fan body 1 is provided with an operation switch 6 that can be adjusted in multiple steps or steplessly for setting the rotational speed, the air volume, the static pressure, etc. from the outside of the main body. The main body control unit 7 is connected.

  The rotation of the DC motor 2 is controlled by drive control means 8 that controls energization of the stator windings according to the rotor position. Here, the drive control means 8 is composed of a semiconductor switching element. These are directly connected to the windings of the DC motor 2 and turn on and off the DC power supply to the windings. The rotational speed of the DC motor 2 can be controlled by changing the speed of the energization switching.

  The rotation speed detection means 9 detects the current operation rotation speed of the DC motor 2. Here, the rotational speed detection means 9 detects the magnetic pole position of the magnet rotor by the Hall IC, and inputs the switching speed thereof by the microcomputer 10 to calculate the rotational speed.

  Then, the rotational speed instruction means 11 indicates the rotational speed of the DC motor 2 necessary for realizing the set value set by the operation switch 6, the rotational speed storage means 13 of the storage means 12, the air volume storage means 14, and the static pressure storage. The target speed is selected from the means 15.

  Here, the rotation speed instruction means 11 is an arithmetic processing function of the microcomputer 10, and is stored in the storage means 12 constituted by the rotation speed, air volume, static pressure set by the operation switch 6 and a part of the ROM of the microcomputer 10. This is an arithmetic processing function for selecting the target rotational speed from the stored data of the rotational speed storage means 13, the air volume storage means 14, and the static pressure storage means 15. In addition, although ROM was used as the memory | storage means 12, the rotation speed memory | storage means 13, the air volume memory | storage means 14, and the static pressure memory | storage means 15, it should just be able to memorize | store data and memory, such as RAM, may be sufficient.

  The voltage control means 16 compares the target rotational speed selected by the rotational speed instruction means 11 with the current operating rotational speed detected by the rotational speed detecting means 9 so that the operating rotational speed is the same as the target rotational speed. The current DC motor applied voltage detected by the voltage detecting means 17 is compared with the current DC motor applied voltage in order to realize the target rotational speed, and the rotational speed is determined by controlling the voltage applied to the DC motor 2. The configuration is adjusted. Here, the voltage control means 16 is comprised by the control signal of the switching power supply 18 which produces | generates DC power supply, and the microcomputer 10 which controls DC power supply voltage. The control signal can control the output voltage of the switching power supply 18 by changing the ON / OFF ratio of the pulse signal that controls the energization of the switching power supply 18.

The storage means 12 formed in a part of the ROM of the microcomputer 10 operates the ventilation fan body 1 on which the DC motor 2 is mounted in advance, and continuously changes the voltage of the DC motor 2 as shown in FIG. operating air volume _{Q1, Q2, Q n-1} , Q n, Q n + 1 and the static pressure _{P 1, P 2, ... P} n-1, P n, P n + the voltage V ₁ of the _1, V _2, ... Rotational speeds N ₁ , N ₂ ,... N _n−1 , N _n , N _{n + 1} ... At V _n−1 , V _n , V _{n + 1} are measured, and as shown in FIG. The rotational speed for the static pressure is stored in the rotational speed storage means 13, the air volume for the rotational speed at each voltage is the air volume storage means 14, and the static pressure for the rotational speed at each voltage is the static pressure storage means 15. It is stored in the storage means 12 as a part.

  The ventilation fan body 1 equipped with the DC motor 2 is actually installed, and the voltage control means 16 applies the voltage set at the start of operation to the DC motor 2 via the drive control means 8 to start the operation.

If it does so, the drive control means 8 will switch the electricity supply with respect to a coil | winding according to the rotor position of the DC motor 2, and the DC motor 2 will rotate with the rotation speed according to the duct loss of a wind path, and room air condition.
Next, the rotational speed instruction means 11 selects the rotational speed of the DC motor 2 necessary for realizing the set value set by the operation switch 6 as the target rotational speed from the storage means 12, and the rotational speed detection means 9 The DC motor 2 controls the voltage applied by the voltage control means 16 so that the operation speed is the same as the target speed compared with the detected current speed.

  The display unit 19 that can be recognized from the outside of the main body displays the set value set by the operation switch 6, the rotation speed detection means 9, the voltage detection means 17, and the storage means 12, the current rotation speed, air volume, and static pressure. be able to. Moreover, the electric power consumed by the DC motor can be displayed by detecting the DC motor applied current from the current detection means 20 provided in the switching power supply 18. Here, the current detection means 20 is provided with a resistor or the like at the output section for applying the DC motor of the switching power supply 18 and detects the DC motor applied current by inputting the current change to the microcomputer 10 as a voltage change and processing it. It becomes possible to do.

  Next, the operation of the ventilation fan configured as described above will be described with reference to the flowchart of FIG.

  First, at STEP1, the voltage control means 16 outputs a preset initial voltage.

  In STEP 2, the drive control means 8 outputs a preset initial gate signal and starts to rotate the DC motor 2.

  Next, in STEP 3, the rotor position of the DC motor 2 is detected from the magnetic pole position detected by the Hall IC of the rotational speed detection means 9, and the drive control means 8 outputs a gate signal corresponding to the detected position in STEP 4. In STEP 5, the rotational speed detection means 9 measures the change time of the magnetic pole position signal of the rotating rotor by switching the energization to the winding by this gate signal, and in STEP 6 performs calculation processing from the measured change time to drive rotation. Calculate and hold a number.

  In STEP 7, the voltage detection means 17 detects the voltage applied to the DC motor 2, and the microcomputer 10 determines and holds it.

  In STEP 8, the operating rotational speed obtained in STEPs 6 and 7, the DC motor applied voltage, the air volume storage means 14 of the storage means 12, and the static pressure storage means 15 are selected for the operating air volume and the static pressure applied to the DC motor 2. Hold.

  Further, in STEP 9, it is compared and determined whether or not it is the maximum and minimum static pressure range of the performance range of the DC motor 2 preset in STEP8.

  As a result of the comparison determination, if the maximum / minimum static pressure range is not satisfied, an abnormality is displayed on the display unit 19 in STEP 10.

  As a result of the comparison determination, if it is within the maximum and minimum static pressure range, the process proceeds to STEP11.

  In STEP 11, the microcomputer 10 determines and holds the setting content set by the operation switch 6. Here, a case where the operating air volume is set will be described.

  In STEP 12, the rotational speed instruction means 11 is set in STEP 11 based on the rotational speed at each operating air volume and static voltage held in advance in the rotational speed storage means 13 of the storage means 12 of the microcomputer 10. Select and maintain a target speed that matches the operating air volume. Similarly, the current operating air volume is also selected and held from the operating speed calculated in STEP 5.

  In STEP 13, the set air volume and the operating air volume, which are selected and held as described above, are displayed on the display unit 19 including a liquid crystal display, an LED, and the like provided in the ventilation fan body 1.

  In STEP14, the operation rotational speed calculated in STEP6 is compared with the target rotational speed selected in STEP12.

  When the operation speed is larger than the target speed as a result of the comparison determination, in STEP 15, the voltage control means 16 determines that the DC motor 2 is selected in STEP 12 from the difference between the operation speed and the target speed. Select and hold the applied voltage that can generate the rotation speed.

  Further, the voltage control means 16 applies the application of the DC motor 2 necessary for generating the current applied voltage of the DC motor 2 detected and retained in STEP 7 in STEP 16 and the target rotational speed selected and retained in STEP 12. Calculate the voltage difference. In this case, the operation rotational speed is larger than the target rotational speed, and an operation of lowering the DC motor applied voltage is performed.

  In STEP 17, the microcomputer 10 constituting the voltage control means 16 changes the ON / OFF ratio of the pulse signal in order to control the voltage corresponding to the applied voltage difference calculated in STEP 16. Then, returning to STEP 4, the gate signal is output to rotate the DC motor 2 with the operation speed approaching the target speed.

  When the operation speed is smaller than the target speed as a result of the comparison determination, in STEP 18, the voltage control means 16 determines that the DC motor 2 is selected in STEP 12 from the difference between the operation speed and the target speed. Select and hold the applied voltage that can generate the rotation speed.

  Further, the voltage control means 16 applies the application of the DC motor 2 necessary for generating the current applied voltage of the DC motor 2 detected and retained in STEP 7 in STEP 19 and the target rotational speed selected and retained in STEP 12. Calculate the voltage difference. In this case, the operation rotational speed is smaller than the target rotational speed, and the DC motor applied voltage is increased.

  In STEP 20, the microcomputer 10 constituting the voltage control means 16 changes and outputs the pulse ratio of the control signal of the switching power supply 18 corresponding to the applied voltage difference calculated in STEP 19. Then, returning to STEP 4, the gate signal is output to rotate the DC motor 2 with the operation speed approaching the target speed.

  Although the case where the operating air volume is set has been described here, the same applies to the operating speed and the static pressure applied to the DC motor, and the target speed set by the operation switch 6 and realizing the set value is set. The voltage is selected from the storage unit 12 and the applied voltage of the DC motor 2 is controlled so that the target rotational speed matches the operating rotational speed.

  As described above, the actual operating state is fed back to the target set value set by the operation switch 6 and the applied voltage of the DC motor 2 is controlled, so that the rotational speed, air volume, static A ventilation fan capable of controlling the pressure to be constant with respect to the target set value is obtained.

  It is also possible to detect the DC motor applied current from the current detection means 20 provided in the switching power supply 18 and display it on the display unit 19.

  By controlling in this way, the rotational speed of the DC motor, the air volume, and the static pressure can be set, and the rotational speed for each voltage is stored in the operating air volume and the static pressure applied to the DC motor 2, and the set target value The actual detection value is always compared and judged during operation, and the applied voltage of the DC motor is adjusted and controlled, whereby a ventilation fan that can be controlled to the set target value is obtained.

  In addition, it is possible to detect the static pressure that satisfies the standard performance of the DC motor, and when it deviates from the static pressure range, there are problems in the duct piping form, outside air pressure, room conditions, filter clogging, etc. by notifying It can be easily determined that there is.

  Ventilation device air volume control according to the present invention is the optimum rotation speed and air volume for the user at the time of installation and after the installation, depending on the installation state, the situation of the room, the purpose of use of the room such as sanitary and smoke chamber. It is possible to set the operation to generate static pressure, and the target is instructed flexibly in response to changes in pressure loss due to the influence of duct piping form, outside wind pressure, room conditions, filter clogging, etc. In addition to driving, it is useful for a wide range of room sizes and room usage purposes with a single type of ventilator.

The block diagram which shows the structure of the ventilation fan of Embodiment 1 of this invention. Circuit block diagram of the ventilation fan Graph of static pressure and rotation speed-air volume at each voltage showing the operating characteristics of the ventilation fan The figure of the table which shows the relationship of the instruction | indication air volume-applied voltage-rotation speed and the instruction | indication air volume-applied voltage-static pressure of the ventilation fan Flow chart of the operation program for the ventilation fan

Explanation of symbols

2 DC motor 6 Operation switch 8 Drive control means 9 Rotation speed detection means 11 Rotation speed instruction means 12 Storage means 13 Rotation speed storage means 14 Air volume storage means 15 Static pressure storage means 16 Voltage control means 17 Voltage detection means

Claims (14)

DC motor mounted on the ventilation fan body, voltage control means for controlling the voltage of the power applied to the DC motor, rotation speed detection means for detecting the rotation speed of the DC motor, and application to the DC motor In order to operate at the designated number of revolutions, voltage detection means for detecting the voltage to be driven, drive control means for exciting and driving the winding of the DC motor, rotation number instruction means for instructing the number of rotations of the DC motor The main body control unit is provided with a rotational speed storage means for storing in advance the rotational speed at each applied voltage of the DC motor, and a multi-stage operation switch that can be operated from the outside of the ventilation fan main body to set the rotational speed of the DC motor. The voltage control means controls the DC motor applied voltage so that the operating speed detected by the speed detecting means becomes the same speed as the target speed set by the multistage operation switch. Exhaust Fan, characterized the door. 2. The ventilation fan according to claim 1, wherein the operation switch for setting the rotation speed of the DC motor is a stepless switch, and the target rotation speed set by the stepless switch is displayed on a display portion provided in the ventilation fan body. . The ventilation fan according to claim 1 or 2, wherein when the operating rotation speed of the DC motor coincides with a target rotation speed set by an operation switch, the display is provided on a display unit provided in the ventilation fan body. The current operating rotational speed detected by the DC motor rotational speed detecting means and the target rotational speed set by the operation switch are displayed on a display unit provided in the ventilation fan body. A ventilation fan as described in 1. Air volume storage means for preliminarily storing each applied voltage applied to the DC motor and the operating air volume determined by the rotational speed of the DC motor, current operating rotational speed detected by the rotational speed detecting means, and voltage detecting means The main body control unit is provided with a multi-stage operation switch that can be operated from outside the main body of the ventilation fan in order to set the air volume of the DC motor, and an air volume detecting means that detects the current air volume detected from the current applied voltage and the air volume storage means. The rotational speed instruction means selects the rotational speed necessary for operation with the target air volume set by the multi-stage operation switch from the air volume storage means as the target rotational speed, and the operating rotation detected by the rotational speed detection means The voltage control means controls the DC motor applied voltage so that the number of revolutions is the same as the target rotational speed instructed by the rotational speed instructing means. Ventilation fan as claimed in claim 1. 6. The ventilation fan according to claim 5, wherein the operation switch for setting the air volume of the DC motor is a stepless switch, and the target air volume set by the stepless switch is displayed on a display unit provided in the ventilation fan body. The ventilating fan according to claim 5 or 6, wherein when the current operating airflow detected by the airflow detecting means coincides with a target airflow set by an operation switch, it is displayed on a display unit provided in the main body of the exhausting fan. The ventilation fan according to any one of claims 5 to 7, wherein the current operation air volume detected by the air volume detection means and the target air volume set by the operation switch are displayed on a display unit provided in the main body of the ventilation fan. Static pressure storage means for storing the static pressure applied to the DC motor determined by each applied voltage applied to the DC motor and the rotational speed of the DC motor, and the current operating rotational speed detected by the rotational speed detection means A static pressure detection means for detecting the current applied voltage detected by the voltage detection means and the static pressure applied to the current DC motor from the static pressure storage means; and an external fan body for setting the static pressure applied to the DC motor. A multi-stage operation switch that can be operated is provided in the main body control unit, and the rotation speed instruction means sets the number of rotations required for operation at the target static pressure set by the multi-stage operation switch from the static pressure storage means. And the voltage control means sets the DC motor mark so that the operating rotational speed detected by the rotational speed detecting means becomes the same rotational speed as the target rotational speed instructed by the rotational speed instructing means. Ventilator according to claim 5, characterized in that to control the voltage. An operation switch for setting a static pressure applied to the DC motor during operation of the DC motor is a stepless switch, and a target static pressure set by the stepless switch is displayed on a display unit provided in a ventilation fan body. Item 10. The ventilation fan according to Item 9. The DC motor during operation of the DC motor detected by the static pressure detecting means is displayed on a display unit provided on the main body of the ventilation fan when the static pressure applied to the DC motor coincides with the target static pressure set by the operation switch. The ventilation fan according to 9 or 10. The current static pressure detected by the static pressure detecting means and the target static pressure set by a multi-stage operation switch operable from outside the ventilation fan body are displayed on a display unit provided in the ventilation fan body. The ventilation fan in any one of -11. A current detection means for detecting the current flowing through the DC motor and a power detection means for calculating the power consumed by the DC motor are provided in the main body control unit and applied to the DC motor detected by the voltage detection means, the current detection means, and the power detection means. The ventilating fan according to any one of claims 9 to 12, wherein displayed voltage, current, and consumed power are displayed on a display unit provided in the ventilating fan body. The static pressure maximum and minimum values that can satisfy the performance of the DC motor are stored in advance in the storage means, and the display provided on the ventilation fan body when the static pressure during operation deviates from the maximum and minimum values The ventilator according to any one of claims 1 to 13, wherein an abnormality is reported to the section.

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