JPH02248692A - Speed control device for fan - Google Patents

Abstract

PURPOSE:To obtain the comfortable wind when the natural wind does not blow by switching the input to a control circuit from the output of an amplifying circuit to the output of a signal generating circuit when a level of the output of a wind sensitizing element is less than a preset value. CONSTITUTION:A change of the natural wind is converted to the electric signal by a wind sensitizing element 1 and is amplified by an amplifying circuit 3. The output of the amplifying circuit 3 is input to a control circuit 6 through a switching circuit 5, and the speed of a blowing unit 7 is controlled on the basis of that signal pattern, and the rotating speed of the blowing unit 7 is controlled so as to be changed as same as the natural wind. When the natural wind is weak and the output of the wind sensitizing element 1 is lower than the preset level, a switching circuit 5 sensitizes it to switch the input to the control unit 6 to a signal generating circuit 4. Then, the speed of the blowing unit 7 is controlled by the signal of the signal generating unit 4 with the change of a preset repeating pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a speed control device for an electric fan that can control natural wind and comfortable wind such as 1/f fluctuation, which has started to attract particular attention in recent years.

BACKGROUND OF THE INVENTION In recent years, a method of converting natural wind changes into electrical signals and transmitting them and operating electric fans according to the signal pattern has been studied.

A conventional electric fan control device will be described below with reference to FIG. As shown in the figure, a wind-sensing element 1 installed in a position receiving natural wind converts changes in the natural wind into an electrical signal, and this electrical signal is sent to an amplifier circuit 3 to a stain source circuit 2 to detect stain force. The supplied air is amplified, the amplified signal is input to the control circuit 6, and the speed of the blower section 7 is controlled according to this signal pattern.

That is, the speed of the electric fan was configured to change in a manner similar to the natural wind at the time, giving a comfortable sensation to the user of the electric fan.

Problems to be Solved by the Invention In such a conventional configuration, when a pleasant natural breeze is blowing outdoors, the speed of the electric fan changes accordingly, giving a comfortable feeling to the user of the electric fan. When the wind is not blowing or is very small, the electric fan generates almost no wind, which causes discomfort to the user of the electric fan.

The present invention takes the above-mentioned problems into consideration and has as its first object the ability to obtain a comfortable breeze even when the natural wind is not blowing. The second purpose is to be able to operate the fan in a preferred natural wind pattern when the natural wind is not blowing or when an unfavorable wind is occurring.

Means for Solving the Problems In order to achieve the first object, the first means of the present invention includes a wind-sensing element that converts changes in natural wind into electrical signals, and amplifying the output of this wind-sensing element. an amplifier circuit, a signal generation circuit that repeats a preset pattern, a switching circuit that switches between the M increase circuit and the signal generation circuit, and a control circuit that receives the output of the switching circuit and controls the speed of the blowing section. The switching circuit is configured to switch the input to the control circuit from the output of the amplifier circuit to the output of the signal generation circuit when the level of the output of the wind sensing element is below a set value. are doing.

A second means for achieving the second purpose includes a wind-sensing element that converts natural wind changes into electrical signals, an amplifier circuit that amplifies the output of this wind-sensing element, and a memory for storing the output of the wind-sensing element. a storage circuit for switching between the amplification circuit and the storage circuit, a control circuit for controlling the speed of the blowing section, and a similar circuit;
The switching circuit is configured to switch the input to the control circuit from the output of the amplifier circuit to the output of the storage circuit when the level of the output of the wind sensing element is below a set value.

Due to the configuration of the first means, when the natural wind is below a certain level, the switching circuit automatically inputs the output of the signal generation circuit to the control circuit, and the electric fan follows a preset certain pattern. This will result in repeated winds.

According to the configuration of the second means, when the natural wind is below a certain level, the switching circuit automatically inputs the memory circuit output to the control circuit, and the electric fan receives the natural wind having the memorized user's favorite pattern. This will generate wind.

Embodiment First, an embodiment according to the first means of the present invention will be described based on FIG. Note that components having the same configuration as the conventional example will be given the same numbers as the conventional example, and detailed explanations will be omitted.

In FIG. 1, a wind-sensing element 1 consisting of a thermistor, a platinum resistance element, etc. is a fan body 8 consisting of a power supply circuit 2, an amplifier circuit 3, a signal generation circuit 4, a switching circuit 6, a control circuit 6, a blower section 7, and a fan body 8. It is connected to multiple lead wires e and can be installed at any location. The amplification circuit 3 amplifies the signal from the wind sensing element 1 using the power from the power supply circuit 2, and the output signal of the amplification circuit 3 is input to the control circuit 6 via the switching circuit 6. The rotational speed of the air blower 7 is controlled. Further, the switching circuit 6 is configured to automatically switch the input to the control circuit 6 from the amplifier circuit 3 to the signal generation circuit 4 when the output of the wind sensing element 1 is below a preset level. has been done.

Since it is configured as described above, if the wind sensing element 1 is installed in a place where natural wind is sensed outdoors, the wind sensing element 1 converts changes in the natural wind into an electrical signal, and the signal is The signal is amplified by the amplifier circuit 3. The output of this amplifier circuit 6 is input to the control circuit 6 via the switching circuit 6,
The speed of the air blower 7 is controlled according to this signal pattern, and the rotational speed of the air blower 70 is controlled with changes similar to natural wind.

Next, if the natural wind is weak and the output of the wind sensing element 1 becomes lower than a preset level, the switching circuit 6 senses this and changes the input to the control circuit 6 to the signal generating circuit 4. The speed of the air blower 7 is controlled by changing the repeating pattern set in advance by the signal from the signal generating circuit 4.

Next, an embodiment according to the second means of the present invention will be described based on FIG. 2. In addition, those with the same configuration as the conventional example,
The same numbers as in the conventional example will be given and detailed explanation will be omitted. As shown in the figure, a wind sensing element 1 composed of a thermistor, a platinum resistance element, etc. includes a power supply circuit 2, an amplifier circuit 3, and a memory circuit 10.
．． It is connected to a switching circuit 6, a control circuit 6, a fan body 8 including a blower section 7, and a lead wire 9, so that it can be installed at any location. The amplification circuit 3 includes the wind sensing element 1
The signal is amplified by the power of the power supply circuit 1,
The output signal of the amplifier circuit 3 is input to the control circuit 6 via the switching circuit 5, so that the rotational speed of the blower section 7 is controlled. Further, the switching circuit 6 is
When the output of the wind sensing element 1 is below a preset level, the input to the control circuit 6 is automatically switched from the amplifier circuit 3 to the memory circuit 10. The storage circuit 1o is capable of storing a pattern for an arbitrarily set period of time while being sensed by the wind sensing element 1, and can store a wind pattern of the user's preference.

With the above configuration, when the wind sensing element 1 is installed outdoors, an electric signal is generated in the wind sensing element 1 due to changes in natural wind, and the signal is transmitted to the amplifier circuit 3. is amplified. The output of this amplifier circuit 6 is inputted to the control circuit 6 via the switching circuit 6, and the rotational speed of the air blower 7 is controlled to change in the same way as natural wind according to this signal pattern.

Next, if the natural wind is weak and the output of the wind sensing element 1 becomes lower than a preset level, the switching circuit 6 senses this and changes the input to the control circuit 6 to the memory circuit 10. The rotational speed of the air blower 7 is controlled by the stored natural wind pattern by the signal from the memory circuit 1o.

That is, even when there are few changes in the natural wind, the speed of the blower section 7 can be controlled according to the natural wind pattern stored in advance according to the user's preference. According to the present invention, it is possible to change the rotational speed of the air blower in a pattern similar to that of natural wind, and even when there are few changes in natural wind, it is possible to change the rotational speed of the air blower in a pattern similar to that of the natural wind. The speed of the fan can be controlled in the same pattern as the person's preferred natural wind.

Effects of the Invention As described above, the electric fan speed control device of the present invention is configured to automatically switch the control signal to the signal generation circuit when there is little change in the natural wind. Even if there is almost no change in the air flow rate, it is possible to switch the fan's air volume to a preset repeating pattern and change it.

In addition, when the natural wind Q change is small, by automatically switching to the memory circuit that has already stored the natural wind, the air volume of the fan can be changed according to the user's favorite natural wind pattern. It is possible to realize an excellent electric fan speed control device that can conveniently provide comfortable wind to the user of the electric fan.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a fan speed control device showing an embodiment of the first means of the present invention, FIG. 2 is a block diagram of a fan speed control device showing an embodiment of the second means, and FIG. The figure is a block diagram of a conventional electric fan speed control device. 1... Wind sensing element, 3... Amplification circuit, 4
...Signal generation circuit, 6...Switching circuit,
6...Control circuit, 7...Blower section, 10
...Memory circuit. Name of agent: Patent attorney Shigetaka Awano and 1 other person E-
--Rij type 8 horse mackerel T-* Ratshu diagram and

Claims (2)

[Claims] (1) A wind sensing element that converts natural wind changes into electrical signals, an amplifier circuit that amplifies the output of this wind sensing element, a signal generation circuit that repeats a preset pattern, the amplifier circuit, and the signal generator. a switching circuit that switches to either one of the circuits, and a control circuit that receives the output of the switching circuit and controls the speed of the blowing section, and when the level of the output of the wind sensing element is below a set value, the switching circuit A speed control device for an electric fan, wherein the input to the control circuit is switched from the output of the amplifier circuit to the output of the signal generation circuit. (2) a wind sensing element that converts natural wind changes into electrical signals; an amplifier circuit that amplifies the output of the wind sensing element; a memory circuit that stores the output of the wind sensing element; It consists of a switching circuit that switches to one of the memory circuits, and a control circuit that controls the speed of the air blower, and when the level of the output of the wind sensing element is below a set value, the switching circuit switches the input to the control circuit. A speed control device for an electric fan, wherein the output of the amplifier circuit is switched to the output of the storage circuit.