JPH0814278B2 - Air volume control device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an air volume control device for a fan, an air conditioner, or the like.

2. Description of the Related Art In recent years, attempts have been made to make the wind of a fan as close as possible to the natural wind.By automatically switching the speed adjustment notch and gradually changing the air volume, an artificial wind that resembles the natural wind is created. There is.

FIG. 5 is an input characteristic waveform to the electric motor of the conventional air volume control device, which has a constant air volume pattern consisting of strong, medium, and weak, and a wind which changes by repeatedly operating this pattern in a cycle T. Is occurring.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described conventional configuration, a constant pattern waveform is repeatedly used at a cycle T, and after a fixed interval has elapsed, the same air volume is always generated, and the user
There is a problem that the desired comfort of the wind is weakened because the wind pattern gets used to it.

The present invention is to solve the above conventional problems, by generating a wind without repeating the same pattern,
It is an object of the present invention to provide an air volume control device capable of maintaining a comfortable feeling.

Means for Solving the Problems In order to solve the above problems, the air volume control device of the present invention is
An electric motor having a speed control notch capable of setting the rotational speed in multiple stages, a blade rotated by the electric motor, and a signal generating means for generating a signal based on the discrete dynamical system sequence x _{n + 1} = axn (1-xn) And a rotation control means for selecting one of the speed control notches, and a determination means for separating the signal of the signal generation means into regions divided by a threshold value.

Action With this configuration, based on the numerical values obtained in the discrete dynamical system sequence, various patterns of signals that generate non-linear behavior while being based on the specified sequence are generated instead of repeating the same pattern. By switching the speed adjustment notch of the electric motor based on the above, a so-called insatiable pattern of wind that is not repeated 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 fan 1 is provided with an electric motor 1a capable of multistage speed control and a control device 1b.

The control device 1b has a signal generating means 2 for generating a signal in accordance with the discrete dynamical system sequence, starting from an initial value x ₀ set at the same time as the switch input. Further, the control device 1b uses the determination means 3 for dividing the output signal of the signal generation means 2 into a preset threshold value range, and the output result divided by the determination means 3 for each layer of the electric fan. Rotation control means 4 for switching the speed control notch of 1a
And have.

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

First, when power is input to the fan 1, the signal generating means 2
A signal is generated more sequentially, and this signal has a value according to the discrete dynamical system sequence.

First, the basic discrete dynamical system number sequence will be explained in detail in Masaya Yamaguchi's book "The Wonder of Chaos and Fractal Nonlinearity" published by Kodansha. The sequence xn is _{expressed as} x _{n + 1} = f (xn) When expressed as, it is expressed numerically as a dynamic system, and if this initial value is set to x ₀ , x _n will be determined for all n.

Further, when this equation is represented by a differential equation, it is called a continuous dynamical system, whereas when the variable n takes only a natural number, it is called a discrete dynamical system. Although this sequence is a deterministic dynamical system, it is a sequence that can produce non-deterministic laws. That is, it is a sequence that follows a certain calculation formula but produces a non-linear result. In addition, one of the discrete dynamical system sequences is a sequence x _{n + 1} derived from the Logistic equation by the difference method.
= Ax _n (1-x _n ) and 3.57 <a ≦ 4,
If the initial value x ₀ is between 0 and 1, then x ₁ , x ₂ , x ₃ ,
…… When the calculation of x _n is performed, x _{n + 1} takes values that are randomly distributed without divergence.

Here, for example, the discrete dynamical system sequence x _{n + 1} set to a = 4
= 4x using _n a (1-x _n), the initial value x ₀ = 0.7, when sequentially effected computed as y _n = x _{n + 1,} the y _n with respect to x _n as shown in FIG. 3 The value according to the system of the discrete dynamical system sequence is output to
Next, the judging means 3 can separate the output signals by layers by judging using the set threshold value. Here, the threshold value is 0-0.15,0.15 to 0.75,0.
Set to 75-1 and the result Y _n separated by layers is
If L, M and H are used, x _n , y _n and Y _n will be the results shown in Table 1 (described up to n = 10).

The operation of the air volume control device configured as described above will be described with reference to the flowchart of FIG. Here, the initial value is x ₀ = 0.7, the threshold range is ₀ to less than 0.15,
0.15 or more and less than 0.75 are set as medium, and 0.75 or more to 1.0 are set as strong.

First, in step 21, the initial value is set, and in step 22, x _{n + 1}
Calculate. Next, in step 23, the calculation result is discriminated based on the threshold value.If the weak notch is energized, go to step 24.If the middle notch is energized, step 25 is performed.
And to branch to step 26 if the strong notch is energized. In this example, the time for energizing each notch was set to 3 seconds as shown in step 27.

In step 28, x _{n + 1} is substituted for x _n , then the process returns to step 22 and the same operation is repeated.

In summary of the operation results, the rotation control means 4 receives the determination result of the determination means 3 and generates the notch switching pattern shown in FIG. 4 (1). It can be seen that this notch switching pattern has no repeating period.

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

In the case of the above embodiment, the initial value x ₀ is fixed to 0.7, but without fixing the initial value, for example, x _n immediately before turning off the power of the air volume control device is stored, and at the time of restarting. By substituting that value for the initial value x ₀ , different trajectories of the discrete dynamical system sequence can be used, and the way of changing the air volume can be changed each time the vehicle is driven. This example is shown in Table 2 and the change pattern is shown in FIG. 4 (2).

EFFECTS OF THE INVENTION As is clear from the above description of the embodiments, the present invention can create various patterns of non-repeating wind without divergence by performing air volume control using a discrete dynamical system sequence. It is an object of the present invention to realize an excellent air volume control device capable of preventing the habituation phenomenon in the bodily sensation that occurs when the same pattern is repeated and maintaining a comfortable sensation.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an air volume control device according to an embodiment of the present invention, FIG. 2 is a flow chart showing an example of a program for the air volume control, and FIG. 3 is a diagram showing the relationship of the discrete dynamical system sequence. x _n -y _n curves, Figure 4 is a waveform diagram of the output pattern,
FIG. 5 is a waveform diagram of a conventional output pattern. 1a: electric motor, 2 ... signal generating means, 3 ... judging means,
4 ... Rotation control means.

Claims (1)

[Claims] 1. A motor having a speed control notch capable of setting rotational speed in multiple stages, a blade rotated by this motor, and a discrete dynamical system sequence x _{n + 1} = ax _n (1-x _n ) A signal generating means for generating a signal, and a judging means for separating the signal of the signal generating means into regions divided by a threshold value,
One of the speed control notches is output according to the output result of the determination means.
An air volume control device having a rotation control means for selecting one.