JPH0128240B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to the amount of air blown by an air conditioner, hot air fan, electric fan, etc.
The present invention relates to a pseudo natural wind generation control device that creates comfortable artificial wind by changing the air blowing angle.

BACKGROUND ART Conventionally, attempts have been made to artificially create comfortable wind by changing the amount of air blown and the angle of air blown. For example, there is an electric fan disclosed in Japanese Patent Application Laid-Open No. 49-67762. This electric fan has a memory device such as a cam, card, or tape that stores data on the amount of air being blown by natural wind or variously changing winds, and a speed that controls the rotational speed of the fan based on the data on the amount of air being blown from this memory device. There is a description that the device is equipped with an adjustment section and changes the airflow generated by the electric fan to resemble natural wind. In addition, in the air conditioning method disclosed in Japanese Patent Application Laid-open No. 50-61046, an irregular signal generator having a frequency distribution of a natural breeze or a similar airflow amount and airflow angle is provided. There is a description that natural wind is artificially created by changing the airflow amount and airflow angle based on the signal.

Problems to be Solved by the Invention However, the former method does not disclose how to store the airflow amount data of a natural wind or a replica of wind that changes in various ways in the memory device, and this is a problem for the present invention. The most important point is unclear.

In addition, the latter method uses irregular signals to create a natural breeze or a similar airflow amount and angle, but is it true that the wind created based on irregular signals is truly effective for the human body? I doubt if it's comfortable.

Furthermore, both the front and back are intended to create artificial wind similar to natural wind, but it is not clear what kind of wind would be comfortable for the human body for the greatest number of people. This is because there are many types of natural wind, and what may be comfortable for one person may not be comfortable for another. For weak people, a rough and vague definition of comfort cannot achieve the intended purpose.

In view of the above-mentioned problems, the present invention aims to stably and easily create uniform artificial wind that many people can feel truly comfortable with.

Means for Solving the Problems In order to achieve the above object, the present invention provides a signal generator that generates a signal whose power spectrum is approximately inversely proportional to frequency, a control amount itself of the air blowing amount variable means, and an air blowing angle. The control amount of the variable means itself includes a blower controller that controls at least one time series of the duration of the operating state with a constant control amount in proportion to the signal from the signal generator.

Effect According to the above configuration, the control amount of the air blowing amount variable means, the control amount of the air blowing angle variable means, and the duration of the operating state with a constant controlled amount are determined based on the signal generator whose power spectrum has a characteristic that is inversely proportional to the frequency. By changing the time series of , the power spectrum of changes in the airflow is made almost inversely proportional to the frequency, making it possible to provide uniform airflow that many people find comfortable. That is,
If the power spectrum of the change in air flow is constant regardless of the frequency (completely irregular change), it is completely impossible to predict what kind of change will occur next, and the sense of suddenness will be strong, which is uncomfortable for the human body. If the power spectrum is inversely proportional to the square of the frequency, the change is slow and there is no sense of freshness, which is unpleasant for the human body.However, if the power spectrum is in the middle of these, the change in air flow is approximately inversely proportional to the frequency, and the change does not feel fresh. As a result, it is possible to obtain ventilation that can be called pseudo-natural wind, which requires little physical acclimatization and is highly comfortable for many people. Moreover, since a signal with a regularity in which the power spectrum is almost inversely proportional to the frequency can be easily realized artificially, the comfortable pseudo-natural wind can be easily created.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram of an embodiment of the present invention. In the figure, reference numeral 1 denotes a pseudo natural wind generation control device, which includes a signal generator 2 whose power spectrum is almost inversely proportional to the frequency, and the rotational speed of the blower fan motor 4 which is proportional to the signal (the number of rotations of the blower fan motor 4 is proportional to the signal). The air blower controller 3 is provided to control the rotational speed of the blower fan motor 4 based on the time series of the control amount (one of the control variables itself). The above signal generator 2 combines a random number generator with the characteristics of the power spectrum A shown in Fig. 2 (the power spectrum is constant regardless of frequency) and a -3 dB/octave filter, so that the power spectrum changes depending on the frequency. A signal having a power spectrum B that is approximately inversely proportional can be easily generated. The power spectrum referred to here is a method that analyzes the power of changes in the air flow over all frequencies to see how much power of the changes in the airflow is concentrated in which frequencies (Iwanami Lecture Fundamentals of Engineering 3 Probability) Statistical Phenomena (1968) Taki, Kaya, Miyagawa, Sekine p.210-p.217).

According to the above configuration, the amount of air blown changes as the rotational speed of the fan motor 4 changes, and the power spectrum of the change in the amount of air blown has a characteristic that is approximately inversely proportional to the frequency, which is comfortable for the human body.

Next, the rotational speed of the fan motor 4, which is one of the control variables of the airflow rate variable means, is fixed at a high rotational speed _N1 and a low rotational speed _N2 , and _N1 and _N2 are alternately repeated for each duration. When changing the time, that is, when setting the controlled amount of the air blowing amount variable means to a constant value such as N ₁ or N ₂ , and changing the duration of the operating state with this constant controlled amount such as N ₁ or N ₂ . I will explain about it. In this case, the air is blown by alternating rotation speeds N ₁ and N ₂ according to the time series of the duration of the operating state with a constant control amount proportional to the signal from the signal generator 2, and the amount of air blown is controlled. The power spectrum of the temporal component is approximately inversely proportional to the frequency to provide comfortable ventilation.

Next, the case of controlling the rotational speed of the fan motor 4, which is one of the control variables of the air flow rate variable means, and the time series of the duration of the operating state at a constant control amount will be explained with reference to FIG. . That is,
The signal generator 2 generates a time series of the rotational speed N of the blower fan motor 4 (N ₁ , N ₃ , N ₄ , N ₂ , N ₃ , N _{1 .} . . ) and the duration T of the operating state at a constant control amount. The time series (T ₁ , T ₂ , T ₃ , T ₄ , T ₁ . . . ) is output as shown in FIG.

Both the time series of the rotational speed N and the time series of the duration T of the operating state with a constant control amount have the characteristic that their power spectra are approximately inversely proportional to the frequency. First, from time zero until the elapse of _T1 , the blower fan motor 4 is rotated at the rotation speed _N1 . time T ₁
When the rotation speed has elapsed, the rotation speed is changed to the next rotation speed N ₃ and this is maintained for a time T ₂ . After time T ₂ has elapsed, the next rotational speed N ₄ is maintained for time T ₃ . Thereafter, in this manner, the rotational speed N and duration T are changed according to the output signal of the signal generator 2. This changing air flow rate has the characteristic that the power spectrum is almost inversely proportional to the frequency, but since the rotation speed N is controlled in stages, the power spectrum peaks at a certain frequency at the moment when the rotation speed N is changed. Therefore, there is a part that is not inversely proportional to the frequency. However, since the frequency at which this peak occurs is in a high frequency band that cannot be felt by the human body, it does not affect the sense of comfort in any way.

Next, another embodiment will be described with reference to FIG. 4, in which the rotational speed of the fan motor 4, which is one of the control variables of the air flow rate variable means, and the time series of the duration of the operating state with a constant control variable are respectively controlled. do.

In the example shown in FIG. 4, read-only memory elements (ROM) 20 and 21 are used as the signal generator 2. In the example shown in FIG. This read-only memory element (ROM) 20,2
1 is a signal obtained from a combination of a random number generator and a -3 dB/octave filter (a signal whose power spectrum is almost inversely proportional to frequency).
These ROMs 20 and 21 are used as the signal generator 2. That is, time-series data of rotation speed N whose power spectrum is almost inversely proportional to frequency (N ₁ , N ₃ , N ₄ , N ₂ , N ₃ , N ₁ ,...
), and time series data (T ₁ , T ₂ , T ₃ , T ₄ , It consists of a second read-only memory element (ROM) 21 that stores data ( _T1 ...).

The blower controller 3 addresses the ROMs 20 and 21, reads out the data at that address, and operates the relays 31, 32, and 3 according to the read data.
A microcomputer 30 outputting ON/OFF signals of 3 and 34, and speed change taps N ₁ , N ₂ , N ₃ , and a fan motor 40 having a capacitor 41.
It is composed of relays 31, 32, 33, and 34 that switch _N4 . In addition, 5 is a blower fan motor 4
This is an AC power supply that supplies power to the 0.

The operation of the microcomputer 30 is based on ROM2.
According to the data read from 0 and 21, an ON signal is output to the relay 31 so that the rotational speed becomes N ₁ within a period from time zero to time T ₁ . From then on relay 3
3, 34, 32, 33, 31... are turned on in this order. Each on time is a time determined by the ROM 21 (T ₁ , T ₂ , T ₃ , T ₄ , T ₁ . . . ).

According to the circuit shown in FIG. 4, the device can be realized with one microcomputer, two ROMs, and four relays. Further, the two ROMs can be omitted by using a microcomputer with built-in ROM and storing the time series signals in the remaining part of the data processing program.

In each of the above embodiments, a means for changing the rotation speed of the fan motor was used as a means for varying the amount of air blown, but it is clear that the same effect can be obtained by using a means for varying the amount of air blown such as a damper. .

As mentioned above, when a blower fan motor or a damper or other airflow variable means is driven with a signal whose power spectrum is approximately inversely proportional to the frequency, the resulting airflow amount also has a power spectrum which is approximately inversely proportional to the frequency, and as a result, the human body A comfortable artificial wind will reach the area.

Next, the case of controlling the air blowing angle will be explained with reference to FIG.

As shown in FIG. 5, the air conditioner 6 has a heat exchanger 60 that changes the air to cold or hot air, and a blower fan motor 61, and the blowing angle of the air is controlled by a damper, which is one of the control variables of the blowing angle variable means. 62 angles. The damper 62 is the stepping motor 6
This configuration is driven by 3. Signal generator 2a
A damper 62 is included in the ROM 20a that constitutes a part of the
Time series data of the air blowing angle θ (θ ₁ ,
θ ₂ , θ ₃ ...) are stored. Also ROM21
Time series data (T ₁ , T ₂ , T _{3 .} . . ) of the duration of the operating state with a constant control amount is stored in a. The power spectrum of the time series of the blowing angle θ and the time series of the constant operating state is approximately inversely proportional to the frequency. 35 is a stepping motor 63 according to the output of the microcomputer 30a.
This is the driver that drives the. The air blower controller 3 is controlled by this driver 35 and the microcomputer 30a.
It constitutes a. Microcomputer 30a
operates the stepping motor 63 in accordance with signals from the ROMs 20a and 21a to control the air blowing angle θ and its duration T. The air blowing change obtained in this way has a characteristic in which the power spectrum is almost inversely proportional to the frequency, so that air blowing with high comfort is performed.

Note that in the above embodiments, only the airflow amount or the airflow angle was changed, but it is possible to change both the airflow amount and the airflow angle so that the power spectrum is approximately inversely proportional to the frequency. You may let them.

Effects of the Invention As described above, the present invention does not simply utilize natural breezes passively, but focuses on the relationship that the power spectrum is almost inversely proportional to the frequency, and The control amount of the air volume variable means itself, the control amount of the air blowing angle variable means itself,
By actively adopting the time series of the duration of the operating state with a constant control amount, it is possible to stably provide a uniform pseudo-natural wind that many people find comfortable, and the power spectrum is almost inversely proportional to the frequency. A signal that can be used to create a natural wind can also be easily created artificially, making it easy to create a pseudo-natural wind. In this way, it can be applied to blowing means such as air conditioners, hot air fans, and fans to provide pleasant and comfortable wind, and can provide safe and comfortable artificial wind to vulnerable people such as the elderly, infants, and the sick. Can be provided.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of a pseudo natural wind generation control device according to an embodiment of the present invention, Fig. 2 is a diagram showing the power spectrum of the signal generator of the device, Fig. 3 is a timing chart for explaining the operation, and Fig. 3 is a diagram showing the power spectrum of the signal generator of the device. FIG. 4 is a block diagram of another embodiment of the present invention, and FIG. 5 is a block diagram of another embodiment of the present invention. 1...Pseudo natural wind production control device, 2...Signal generator, 3...Blower controller, 4...Blower fan motor, 20, 20a, 21, 21a...ROM.

Claims (1)

[Claims] 1. A signal generator that generates a signal whose power spectrum is approximately inversely proportional to frequency;
The time series of at least one of the control amount of the air blowing amount variable means itself, the control amount of the air blowing angle variable means itself, and the duration of the operating state with the constant control amount is controlled in proportion to the signal from the signal generator. A pseudo natural wind generation control device characterized by comprising a blower controller.