JP2009127599A - Fan device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fan device capable of obtaining the stable rotation of a fan by easily and surely eliminating a foreign substance by the rotation of the fan itself even at the occurrence of the temporary fixation of the fan caused by the adhesion of the foreign substance to the rotational system of the fan. <P>SOLUTION: In this fan device, power is applied to the fan 1 in terms of a pulse at least in the initial stage of operation. Thus, the fan 1 is rotated intermittently at least in the initial stage of the operation of the fan 1 even if the fan 1 is firmly fixed temporarily due to the foreign substance adhered to the rotational system of the fan 1, and the foreign substance adhered to the rotational system of the fan 1 can be eliminated by an impact caused by the intermittent rotation of the fan 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fan device.

  Conventionally, in an electrostatic atomizer or the like, a heat exchanger such as a Peltier unit as a cooling means in an electrostatic atomizer that supplies water to the atomization electrode by cooling and condensing moisture in the air. In which a cooling fan is provided for cooling the heat radiating part in the heat exchanger, or an electrostatic atomized charged fine particle water is transferred to a target space. And so on.

  At present, these fan devices are continuously operated when the electrostatic atomizer is operated.

  However, if foreign matter or the like temporarily adheres to the rotating system of the fan and the fan temporarily sticks, the fan does not rotate normally and heat cannot be sufficiently dissipated. There has been a problem that electrostatic atomization cannot be performed due to a situation where it cannot be obtained, or the generated charged fine particles cannot be smoothly transferred to a target space.

As a conventional example for controlling the fan, the applied voltage to the heat radiating fan is set to 1 / f fluctuation so as not to disturb the wind noise of the heat radiating fan for exhausting the heat generated inside the printing apparatus to the outside. Although it is known from Patent Document 1 that the control is performed in such a manner that the foreign material is temporarily adhered to the rotating system of the fan, the fan is temporarily fixed. No countermeasures are disclosed for cases.
JP-A-2005-76540

  The present invention has been invented in view of the above-described conventional problems, and even when a foreign object or the like adheres to the rotating system of the fan and the fan is temporarily fixed, It is an object of the present invention to provide a fan device that can easily and reliably remove foreign matters and obtain stable fan rotation.

  In order to solve the above-mentioned problems, the fan device according to the present invention is characterized by applying a power supply to the fan 1 in a pulse manner at least in the initial stage of operation.

  With such a configuration, even if foreign matter or the like adheres to the rotating system of the fan 1 and the fan 1 is temporarily fixed, the fan 1 Foreign matter that rotates intermittently and adheres to the rotating system of the fan 1 due to impact caused by intermittent rotation of the fan 1 can be removed.

  In addition, a rotation signal detection unit 2 for detecting the rotation of the fan 1 is provided. When the rotation state of the fan 1 detected by the rotation signal detection unit 2 becomes a predetermined state, power supply to the fan 1 is continuously applied. It is preferable to do.

  By adopting such a configuration, the foreign matter adhering to the rotating system of the fan 1 is removed by an impact caused by the intermittent rotation of the fan 1 in the initial operation of the fan 1, and the rotation of the fan 1 detected by the rotation signal detecting means 2. If the state becomes a predetermined state, the power supply to the fan 1 can be continuously applied to make the fan 1 have a stable normal rotation.

  Further, a rotation signal detection means 2 for detecting the rotation of the fan 1 is provided, and a threshold value for switching the power supply application to the fan 1 from the pulse application to the continuous application is set as the power supply voltage to the fan 1. It is preferable to make it smaller than the threshold value of the continuous operation stop for stopping the application during continuous application.

  As described above, the threshold for switching the power supply application to the fan 1 from the pulsed application to the continuous application is set to the continuous operation for stopping the application during the continuous application of the power supply voltage to the fan 1. By making it smaller than the stop threshold, switching from pulsed application to continuous application can be easily detected, and the rotational speed of continuous operation can be read accurately, and abnormal rotation is judged. It is possible to accurately stop the continuous operation during abnormal rotation.

  Moreover, it is preferable to have the environmental temperature detection means 3 and to control the fan 1 not to operate when the environmental temperature is lower than or equal to a predetermined temperature or higher than the predetermined temperature.

  By adopting such a configuration, the operation of the fan 1 can be stopped when the environmental temperature is lower than the predetermined temperature and / or higher than the predetermined temperature, and the fan 1 is protected from use outside the operation guarantee environment. Can do.

  In addition, it is preferable to have the input power supply voltage detection means 4 and to control the fan 1 not to operate when the input voltage is outside the specified range.

  By adopting such a configuration, there is a possibility that the required rotation speed required for the fan 1 cannot be obtained because the input voltage is too low, or that the input voltage is too high and the rotation speed increases too much, leading to a failure. If there is, the fan 1 is stopped, so that the fan 1 can be operated only at a normal rotational speed.

  In addition, it has an input power supply voltage detection means 4 and controls the fan 1 not to operate when the input voltage is higher than the specified range, and does not stop the operation of the fan 1 when the input voltage is lower than the specified range. It is preferable to control.

  By adopting such a configuration, if the input voltage is higher than the specified range, the rotation speed of the fan 1 becomes too high, and the rotation may exceed the guaranteed range of the fan 1. It determines with rotation and the operation | movement of the fan 1 is stopped. On the other hand, when the input voltage is lower than the specified range, the required rotation speed required for the fan 1 is not obtained. However, since the fan 1 is rotating temporarily, there is no problem even if the fan 1 is moving, and therefore it does not stop. You can continue driving.

  In the present invention, since the power supply to the fan is applied in a pulse manner at least at the initial stage of operation as described above, even if a foreign matter adheres to the rotating system of the fan and the fan is temporarily fixed, the fan intermittently The fan can be driven by a specific rotation, and foreign matters can be removed easily and reliably to obtain a stable fan rotation.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  FIG. 2 shows a control block diagram of the fan device of the present invention, wherein 1 is a fan, 5 is a control unit such as a microcomputer, and the control unit 5 has a rotation signal detecting means for detecting a rotation signal of the fan 1. 2 is provided.

  In the present invention, as shown in FIG. 1, at least in the initial stage of operation of the fan 1, an operation signal is output from the control unit 5 to the fan 1 so as to apply a power supply to the fan 1 in a pulsed manner. Thus, the fan 1 is controlled so as to perform intermittent rotation at least in the initial stage of operation.

  As described above, the intermittent rotation operation is performed at least at the initial stage of the operation of the fan 1, so that even if a foreign object or the like temporarily adheres to the rotation system of the fan 1 and the fan 1 is stuck, the intermittent rotation is performed. That is, by repeatedly turning on and off intermittently, it is possible to remove foreign matters fixed to the rotating system of the fan 1 due to an impact caused by intermittent rotation.

  Here, as an example of a specific example in which power supply to the fan 1 is applied in a pulsed manner at the initial stage of operation of the fan 1, the start signal for starting the operation of the fan 1 is received and then on for 1 second, for 0.5 second. By alternately turning off, it is controlled to apply a power supply voltage to the fan 1 in a pulse manner.

  The embodiment shown in FIG. 1 is an example in which the control unit 5 performs control so that power is applied not only in the initial operation of the fan 1 but also in pulses during the operation period of the fan 1.

  In the embodiment shown in FIGS. 3 and 4, if power is applied in a pulsed manner at the initial stage of operation of the fan 1 and the rotation state of the fan 1 detected by the rotation signal detection means 2 becomes a predetermined state (for example, When the number of rotations of the fan 1 is detected by the rotation signal detection means 2 and the number of rotations of the fan 1 exceeds a preset threshold value for switching from pulsed application to continuous application), foreign matters and the like are removed. Assuming that the power is applied to the fan 1 continuously, the controller 5 controls the fan 1 so that the fan 1 operates normally continuously.

  In the embodiment shown in FIGS. 5 and 6, the power application to the fan 1 is switched from the pulse application in the initial operation to the continuous application as described above. When an abnormality that increases in the rotation speed of the fan 1 occurs during continuous operation in which the power supply voltage is continuously applied to the fan 1, this is detected by the rotation signal detection means 2 and the controller 5 applies power to the fan 1 Is controlled to reduce the rotation speed by switching to pulse-like application, and again, the rotation signal detecting means 2 detects the rotation speed of the fan 1 and the rotation speed of the fan 1 is continuously applied from the pulsed application set in advance. When the threshold value for switching to application is reached, control is performed to switch to continuous application of the power supply voltage, assuming that the rotational speed has returned to the normal rotational speed again. Here, the threshold value for switching the power supply application to the fan 1 from the pulse application to the continuous application is the continuous operation for stopping the application during the continuous application of the power supply voltage to the fan 1. The threshold is smaller than the stop threshold.

  Further, the fan device of the present invention as described above has the environmental temperature detecting means 3 as shown in FIG. 2, and the environmental temperature detected by the environmental temperature detecting means 3 is below a predetermined temperature exceeding the specified temperature range or / The controller 1 is controlled so as not to operate the fan 1 when the temperature exceeds a predetermined temperature, and the operation of the fan 1 may be stopped when the environmental temperature is equal to or lower than the predetermined temperature. The fan 1 can be protected from use outside the operation guarantee environment.

  Further, the fan device of the present invention has the input power supply voltage detection means 4 as shown in FIG. 2, and when the input voltage is outside the specified range, the fan 1 is not operated or the device equipped with the fan 1 is operated. It is controlled by the control unit 5 so that the required rotation speed required for the fan 1 cannot be obtained because the input voltage is too low, or the rotation speed increases because the input voltage is too high. If there is a possibility of failure due to too much, the fan 1 is stopped, so that the fan 1 can be operated only at a normal rotational speed.

  Here, in the case of the above example, the example in which the control unit 5 performs control so as not to operate the fan 1 in any case where the input voltage is higher than the specified range or lower than the specified range is shown. When the input voltage is higher than the specified range, control is performed so that the fan 1 is not operated, and when the input voltage is lower than the specified range, control is performed by the control unit 5 so that the operation of the fan 1 is not stopped. Good. In this embodiment, when the input voltage is higher than the specified range, the rotation speed of the fan 1 increases too much and the rotation exceeds the guaranteed range of the fan 1 and causes a failure. Then, the operation of the fan 1 is stopped. On the other hand, when the input voltage is lower than the specified range, the required number of rotations required for the fan 1 is not obtained, but since it is rotating once, there is no problem even if the fan 1 is moving, so do not stop. Driving can be continued.

  The fan device having the above-described characteristics is provided in the electrostatic atomizer 6, for example.

  FIG. 7 shows an example in which the electrostatic atomizer 6 is provided with the fan device of the present invention.

  The electrostatic atomizer 6 includes an atomizing electrode 7, a water supply means 8 for supplying water to the atomizing electrode 7, and an atomizing electrode 7 for electrostatically atomizing the water supplied to the atomizing electrode 7. And a high-voltage power supply circuit 9 for applying a high voltage to the water supplied to the water.

  In the embodiment shown in the accompanying drawings, an example is shown in which the water supply means 8 is constituted by a cooling means for supplying water to the atomizing electrode 7 by generating moisture in the air as condensed water. .

  FIG. 7 shows a schematic configuration diagram of an atomization block 6a constituting the main body of the electrostatic atomizer 6 used in the present invention. In the embodiment shown in FIG. 7, the cooling means is configured by the Peltier unit 11, and water is supplied to the atomizing electrode 7 by generating condensed water by cooling the moisture in the air by the cooling means. ing.

  In the Peltier unit 11, a pair of Peltier circuit boards 15 each having a circuit formed on one side of an insulating plate made of alumina or aluminum nitride having high thermal conductivity are arranged so as to face each other so as to face each other. The BiTe-based thermoelectric element 16 is sandwiched between the two Peltier circuit boards 15 and the adjacent thermoelectric elements 16 are electrically connected to each other by the circuits on both sides, to the thermoelectric element 16 formed via the Peltier input lead wire 17. Is configured such that heat is transferred from one Peltier circuit board 15 side toward the other Peltier circuit board 15 side. Further, a cooling unit 13 is connected to the outside of the Peltier circuit board 15 on one side, and a heat dissipation unit 12 is connected to the outside of the Peltier circuit board 15 on the other side. Then, an example of a heat radiating fin is shown as the heat radiating portion 12. A rear end portion of the atomizing electrode 7 is connected to the cooling portion 13 of the Peltier unit 11.

  The atomizing electrode 7 is surrounded by a cylinder 18 made of an insulating material, and a window 18 a that communicates the inside and outside of the cylinder 18 is provided on the peripheral wall of the cylinder 18. Further, a ring-shaped counter electrode 14 is disposed at the tip opening of the cylindrical body 18, and the atomization is performed so that the center of the ring of the ring-shaped counter electrode 14 is positioned on the extension line of the axis of the atomization electrode 7. The electrode 7 and the counter electrode 14 are opposed to each other.

  When the electrostatic atomizer 6 is energized to the Peltier unit 11, the cooling unit 13 is cooled, and the cooling unit 13 is cooled, whereby the atomizing electrode 7 is cooled, and moisture in the air is condensed. Water (condensation water) is supplied to the atomizing electrode 7.

  When a high voltage is applied from the high voltage power supply circuit 9 between the atomizing electrode 7 and the counter electrode 14 in a state where water is supplied to the atomizing electrode 7 in this manner, the space between the atomizing electrode 7 and the counter electrode 14 is The coulomb force acts between the water supplied to the tip of the atomizing electrode 7 by the high voltage applied to the counter electrode 14 and the water surface locally rises in a cone shape (tailor cone). Is done. When the tailor cone is formed in this way, the electric charge concentrates on the tip of the tailor cone and the electric field strength in this portion increases, thereby increasing the Coulomb force generated in this portion and further growing the tailor cone. . When the tailor cone grows like this and the charge concentrates on the tip of the tailor cone and the density of the charge becomes high, the water at the tip of the tailor cone has a large energy (repulsive force of the charge that has become dense). In response to this, a large amount of nanometer-sized charged fine particle water charged negatively by repeating splitting and scattering (Rayleigh splitting) exceeding the surface tension is generated.

  In the electrostatic atomizer 6 as described above, the heat dissipating fan 1a for cooling the heat dissipating part 12 of the Peltier unit 11 or the generated charged fine particle water is transferred to the target space in an air flow. Therefore, a fan 1b for transfer is required. The fan device of the present invention described above is used as the heat dissipating fan 1a or the transfer fan 1b.

  Here, the fan 1a for heat dissipation is blown as indicated by an arrow A in FIG. 7 and is applied to the heat dissipating part 12 for heat exchange to effectively dissipate the heat from the heat dissipating part 12, whereby the cooling part 13 in the Peltier unit 11 is obtained. It is possible to prevent the cooling capacity from being lowered and to reliably condense moisture in the air and supply the condensed water to the atomizing electrode 7. However, foreign matter or the like adheres to the rotating system of the heat dissipating fan 1a. When the sticking occurs, the heat radiation in the heat radiating section 12 is not sufficiently performed. For this reason, the cooling capacity of the cooling section 13 is remarkably reduced, and moisture in the air is reliably condensed to supply the condensed water to the atomizing electrode 7. In the present invention, as described above, the power supply to the heat dissipation fan 1a is controlled to be applied in a pulsed manner at the initial stage of operation of the heat dissipation fan 1a. Heat dissipation Of the intermittent rotation of the fan 1a, to remove fixed to the rotating system of the fan 1a for heat dissipation foreign matter becomes a stable normal operation. Therefore, heat can be effectively radiated from the heat radiating unit 12, the cooling capacity of the cooling unit 13 in the Peltier unit 11 is prevented from being lowered, moisture in the air is reliably condensed, and the atomizing electrode 7 is condensed. Water can be supplied and stable electrostatic atomization can be achieved.

  Also, nanometer-sized charged fine particle water is generated by electrostatic atomization, but the generated charged fine particle water moves only by the force of the electric lines of force, and is reliably transferred to the target space. Can not do it. Therefore, a transfer fan 1b is provided in order to reliably transfer the generated charged fine particle water to the target atomization target space, and air is blown by the transfer fan 1b as shown by an arrow b in FIG. Transfer to the target space. In this case, if foreign matter or the like adheres to the rotating system of the transfer fan 1b and sticking occurs, there may occur a situation in which the charged fine particle water cannot be transferred to the target atomization target space. As described above, in the initial stage of operation of the transfer fan 1b, the transfer fan 1b is controlled so as to apply a pulsed power supply to the transfer fan 1b. The foreign matter fixed to the rotating system of the fan 1b is removed, and stable and normal operation is achieved. Therefore, the generated charged fine particle water can be reliably transferred to the target atomization target space on the air flow.

  Since the nanometer-sized charged fine particle water generated by the electrostatic atomizer 6 is extremely small as nanometer size, it floats in the air for a long time and has high diffusivity, so that it reaches every corner in the target atomization target space. Floating and adhering to the inner surface of the atomization target space and the stored items stored in the atomization target space, and the nanometer-sized charged fine particle water exists such that the active species are encapsulated in water molecules. Therefore, it has a deodorizing effect, a sterilization effect on fungi and fungi, and a suppression effect on propagation, and nanometer-sized charged fine particle water that exists in such a way that active species are encapsulated in water molecules has a longer life than when free radicals exist alone. Therefore, the diffusibility, the deodorizing effect, the sterilizing effect of mold and fungi, and the effect of suppressing the propagation are further improved. In addition, since the nanometer-sized charged fine particle water has a moisturizing effect, the effect of moisturizing can be exhibited.

  By the way, when the air heated to the heat radiating part 12 blown by the heat radiating fan 1a is heated to flow into a space where condensed water is to be generated and the temperature of the space rises, the condensed water is There is a risk that it cannot be generated. Therefore, the air that has been blown by the heat dissipating fan 1a and exchanged heat against the heat dissipating unit 12 to become high temperature is a space for condensing moisture in the air to generate condensed water (in the embodiment, a cooling unit). 13, the atomization electrode 7 is cooled to generate condensed water, so that it does not flow into the space in which the atomization electrode 7 is located.

  Moreover, although the example which provided the fan 1a for heat radiation, the fan 1b for ventilation, and the separate fan 1 was shown in the said example, the fan 1a for heat radiation and the fan 1b for ventilation are shown above in FIG. A single fan 1 according to the present invention may also be used. In this case, the air flow from one fan 1 is branched into two flows, and one of the air flows is a space for generating condensed water as indicated by an arrow C in FIG. 7 is cooled to generate condensed water, so that it flows to the space in which the atomizing electrode 7 is located), and the other air flow is caused to flow toward the heat dissipating part 12 as indicated by an arrow D in FIG. And the other air flow which became high temperature by the heat radiation from the thermal radiation part 12 is made not to flow to the space side for producing condensed water.

It is a time chart which shows control of the voltage applied to the fan of the fan apparatus of this invention. It is a control block diagram of the fan apparatus of this invention. It is a time chart which shows control of the voltage applied to the fan of other embodiment of the fan apparatus of this invention. It is explanatory drawing which shows the relationship between the rotation speed of a fan same as the above, and time. It is a time chart which shows control of the voltage applied to the fan of other embodiment of the fan apparatus of this invention. It is explanatory drawing which shows the relationship between the rotation speed of a fan same as the above, and time. It is a schematic block diagram which shows an example of the electrostatic atomizer using the fan apparatus of this invention. It is a schematic block diagram which shows the other example of the electrostatic atomizer using the fan apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fan 2 Rotation signal detection means 3 Environmental temperature detection means 4 Input power supply voltage detection means

Claims (6)

  A fan device that applies a power supply to a fan in a pulse manner at least in an initial stage of operation.   A rotation signal detection means for detecting rotation of the fan is provided, and when the rotation state of the fan detected by the rotation signal detection means reaches a predetermined state, power supply to the fan is continuously applied. Item 4. The fan device according to Item 1.   A rotation signal detection means for detecting the rotation of the fan is provided, and a threshold value for switching the power supply to the fan from the pulsed application to the continuous application is set during the continuous application of the power supply voltage to the fan. 3. The fan device according to claim 2, wherein the fan device is smaller than a threshold value for stopping the continuous operation for stopping the application.   The apparatus according to any one of claims 1 to 3, further comprising an environmental temperature detecting unit, wherein the fan is controlled not to operate when the environmental temperature is equal to or lower than a predetermined temperature or / and higher than a predetermined temperature. Fan device.   4. The fan device according to claim 1, further comprising: an input power supply voltage detection unit configured to control the fan not to operate when the input voltage is out of a specified range. 5.   It has input power supply voltage detection means, and controls the fan not to operate when the input voltage is higher than the specified range and controls the fan operation not to stop when the input voltage is lower than the specified range. The fan apparatus as described in any one of Claim 1 thru | or 3 characterized by the above-mentioned.

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