JPH02223695A - Airflow control device - Google Patents

Abstract

PURPOSE:To enable continuation of a comfortable feeling by providing an electric motor having a multistage notch to rotate a blade, a signal generating means to generate a signal based on a discrete dynamic system sequence, a deciding means to classify signals by a region divided by a threshold, and a rotation control means. CONSTITUTION:When a power source inputted to an electric fan 1, signals are orderly generated from a signal generating means 2, and the signal has a value following a discrete dynamic system sequence. The discrete dynamic system sequence follows a specified calculation formula, but is a sequence to produce a non-linear result. In which case, when orderly calculation is effected on a discrete dynamic system sequence xn+1=4xn(1-xn) serving as initial valves x0=0.7 and yn=xn+1, yn to xn outputs a value shown in a figure. The output signal is discriminated by using a threshold by a deciding means 3 to classify results by a layer. A rotation control means 4 receives the deciding result of the deciding means 3 and generates a notch switching pattern, and the pattern forms that having no repeat period.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an air volume control device for electric fans, air conditioners, and the like.

Conventional technology In recent years, attempts have been made to make the wind from an electric fan as close as possible to natural wind. It's out.

Figure 6 shows the input characteristic waveform to the electric motor of a conventional air volume control device, which has a fixed air volume pattern consisting of high, medium, and low, and changes by repeatedly operating this pattern at a cycle T. It's generating wind.

Problems to be Solved by the Invention However, in the conventional configuration described above, a certain pattern waveform is used repeatedly at a period T, and the same air volume is always generated after a certain interval has elapsed. This poses a problem in that the user becomes accustomed to the wind pattern, which diminishes the sense of comfort that the wind was designed to provide.

The present invention solves the above-mentioned conventional problems, and aims to provide an air volume control device that can maintain a feeling of comfort by generating air that does not repeat the same pattern. do.

Means for Solving the Problems In order to solve the above problems, the air volume control device of the present invention includes: an electric motor having a multi-stage notch for rotating blades; a signal generation means for generating a signal based on a discrete dynamical sequence; The apparatus is constructed to include a determining means for separating the signal from the signal generating means into regions divided by threshold values, and a rotation control means for selecting one of the multi-stage notches.

Effect: With this configuration, signals with various patterns that behave nonlinearly even though they are based on a prescribed number sequence are generated, rather than repeating the same pattern, based on the numerical values obtained from the discrete dynamical sequence. By switching the notch of the electric motor based on this signal, a wind pattern that does not repeat and that you never get tired of is generated.

Examples Examples of the present invention will be described below with reference to FIGS. 1 to 4.

As shown in FIG. 1, the electric fan 1 is equipped with a multi-speed adjustable electric motor 1a and a control device 1b.

The control device 1b has an initial value X set at the same time as the switch is input. It has a signal generating means 2 which generates a signal according to a discrete dynamical sequence starting from . Further, the control device 1b includes a determining means 3 that divides the output signal of the signal generating means 2 into a range of preset threshold values;
Based on the output results divided into υ layers by the determining means 3,
It has a rotation control means 4 for switching the notch of the electric motor 1a of the electric fan.

The operation of the air volume control device of this embodiment configured as described above will be described below.

First, when power is input to the electric fan 1, signals are sequentially generated from the signal generating means 2, and these signals have values according to a discrete dynamical sequence.

First, we will explain the basic discrete dynamical system sequence. Although this sequence is a deterministic dynamical system, it is a sequence that can produce non-deterministic laws. In other words, it is a sequence of numbers that follows a certain calculation formula but yields nonlinear results. Also, if the initial value X is set between 0 and 1,
Sequentially X1, X2.

X 3t...This is a number sequence that does not diverge even if In is calculated.

Here, the discrete dynamical sequence x n + , = 4 x n
(1xn), initial value X□:=Q, 717n=”n+
1, yn is output as a value according to the relationship of the discrete dynamical system sequence as shown in FIG. By using the determined threshold value, it is possible to separate by stratification. Here, the threshold value is 0-0.15
0.15 to 0.75 and 0.75 to 1, respectively, and the resultant Yn separated by layer is M.

When H, Xn, 7n, and Yn have the results shown in Table 1 (up to n=10).

The operation of the air volume control 11 device configured as described above is controlled by the second
This will be explained using the flowchart shown in the figure. Here, 1.0 is set as strong.

First, in step 21, initial values are set, and in step 22, "
Perform calculation of n+1. Next, in step 23, the calculation result is judged based on the threshold value, and if the weak notch is to be energized, the process goes to step 24, if the middle notch is to be energized, the process is to step 26, and if the strong notch is to be energized, the process goes to step 26. Branching to step 26. In Example 0, the time for energizing each notch was 3 seconds as shown in step 27.

In step 28, xn+ is substituted for x3, and then the process returns to step 22 to repeat the same operation. The notch switching pattern shown in FIG. 0) is generated. It can be seen that this notch switching pattern has no repeating period.

As described above, according to the above embodiment, by using a discrete dynamical sequence for air volume control, it is possible to create various patterns of changing wind without repeating the same pattern of air volume changes.

In the case of the above embodiment, the initial value x0 was fixed at 0.7, but instead of fixing the initial value, for example, In just before the power of the air volume control device is turned off is memorized, and when the air volume control device is restarted, it is stored. By substituting that value for the initial value x0, different trajectories of the discrete dynamical series can be used, and the way the air volume changes can be changed each time the vehicle is driven. This example is shown in Table 2, and the pattern of change is shown in FIG. 4 (2).

Effects of the Invention As is clear from the above description of the embodiments, the present invention is capable of creating various patterns of wind without divergence or repetition by controlling air volume using a discrete dynamical sequence. The present invention aims to realize an excellent air volume control device that can prevent the physical sensation of acclimatization that occurs due to the repetition of the same pattern in the past, and can maintain a feeling of comfort.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an air volume control device according to an embodiment of the present invention, Fig. 2 is a flowchart showing an example of a program for air volume control, and Fig. 3 is a diagram illustrating the relationship between the discrete dynamics series. ``n'n curve diagram, Figure 4 is a waveform diagram of the output power turn, and Figure 5 is a waveform diagram of the conventional output power turn. 1a... Electric motor, 2... Signal generation. Means, 3...determination means, 4...rotation control means. Name of agent: Patent attorney Shigetaka Awano and one other person.

Claims (1)

[Claims] an electric motor having a multi-stage notch for rotating a blade; a signal generation means for generating a signal based on a discrete dynamical sequence; a determination means for separating the signal of the signal generation means into regions divided by threshold values; An air volume control device comprising rotation control means for selecting one of the multistage notches based on the output result of the determination means.