JPH07332717A - Air volume controller for ventilating fan - Google Patents

Abstract

PURPOSE:To provide an air volume controller for ventilating fan, which changes the volume of ventilating air continuously by switching the air volume notch of a fan motor continuously. CONSTITUTION:An air volume controller is provided with an air volume setting means 1, capable of setting the volume of ventilating air continuously, an air volume recognizing means 3, recognizing the setting of volume of ventilating air, an air volume notch connection and distribution storing means 4, storing the distribution of the retaining times of respective air volume notches with respect to respective volume of ventilation, and a repeating time storing means 5, storing the repeating times of connection and retention of respective air volume notches. Further more, the controller is provided with an operation judging means 6, determining that at an elapsed time point what air volume notch is to be connected based on the volume of ventilating air in the air volume recognizing means 3 while referring to the repeating times of the notch connection and distribution storing means 4 and the repeating time storing means 5, and switching means 9A, 9B, connecting respective air volume notches of a fan motor 7 to a power supply 8 by the signal of the operation judging means 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation fan air volume control device for controlling the overall ventilation air volume by continuously switching the air volume notch of a fan motor.

[0002]

2. Description of the Related Art In recent years, general-purpose ventilation fans of this kind, ceiling-embedded ventilation fans, heat exchange-type ventilation fans, ventilation fans such as range hoods, etc.
It is desired to freely control the ventilation air volume up to a minute air volume. Conventionally, this type of ventilation fan air volume control is performed by changing the notch of the fan motor to control the ventilation air volume in stages, or in one cycle of the power supply voltage, the phase that connects the power supply and the fan motor for a set time. The ventilation air volume was controlled continuously by using the control method. Also,
Japanese Patent Application Laid-Open No. 3-158635 proposes a device that controls the ventilation air volume by intermittent operation at regular intervals.

Of these, the most common one is an air volume control device for a ventilation fan which controls the ventilation air volume stepwise by changing the air volume notch of the fan motor. The configuration will be described below with reference to FIG.

As shown in the figure, the air volume setting means 101 for setting the ventilation air volume, and the air volume recognizing means 103 built in the micro computer 102 for recognizing the air volume setting by the setting of the air volume setting means 101, and this air volume recognizing means 103. The air volume signal output from the fan motor 104 determines which air volume notch of the fan motor 104 to operate and outputs a signal, and the air volume notches of the fan motor 104 based on the signal output from the operation determination means 105. Switch means 107A, 107 for connecting the
It is composed of B.

In the above configuration, if the air volume setting means 101 is set weak, the air volume recognizing means 103 recognizes that the air volume setting is weak, and if it is set strong, it is set strongly. Recognize that
When the air volume signal output from the air volume recognition means 103 is weak, the operation judging means 105 outputs a signal to the switch means 107A connecting the weak notch of the fan motor 104 to the power source 106, and when the air volume signal is strong, Fan motor 104
Switch means 107 for connecting the strong notch of
A signal is output to B, and the switch means 107A and 107B operate the fan motor 104 with a weak and strong ventilation air volume according to the signal output from the operation determination means 105.

[0006]

In such a conventional ventilation fan air volume control device, the ventilation air volume is controlled by the fan motor 104.
Because it was changed by switching the air volume notch, for example, strong,
Only two types, weak, could be changed, and the ventilation air volume could not be changed continuously.

Therefore, when continuously operating the ventilation fan,
There is a problem that the ventilation volume becomes too large, and therefore the room temperature changes abruptly to impair comfort, and in order not to do so, the ventilation fan must be manually switched frequently.

Further, in the ventilation air flow rate control device by phase control, since many harmonics are generated in the power supply voltage, there is a problem that electromagnetic noise, which should be an abnormal noise, is easily generated during operation.

Further, in the ventilation air volume control device by intermittent operation, since ventilation is concentrated during the operation period, there is a problem that the room temperature changes abruptly and the comfort is impaired.

The present invention is to solve the above-mentioned problems. The ventilation air volume is adjusted by continuously switching and controlling the air volume notch of the fan motor of the ventilation fan, and the ventilation air volume is continuously changed. First, to provide a ventilation fan air volume control device that can set continuous ventilation air volume corresponding to
The purpose of.

A second object is to provide an air flow rate control device for a ventilation fan in which the continuous ventilation air volume corresponding to a small air volume can be set even by the intermittent operation by setting the intermittent operation, and the temperature change is gentle. It is in.

[0012]

In order to achieve the above-mentioned first object, the air volume control device for a ventilation fan according to the present invention comprises: an air volume setting means for continuously setting the ventilation air volume; and a microcomputer. Built-in, the air volume recognition means for recognizing the ventilation air volume setting output from the air volume setting means, the air volume notch connection distribution storage means for storing the distribution of the connection time of each air volume notch for each ventilation air volume, Repetition time storage means for storing the repetition time of the connection distribution of each air volume notch, and the repetition time output from the air volume notch connection distribution storage means and the repetition time storage means based on the ventilation air volume output from the air volume recognition means. Of the fan motor based on the signal output from the operation judging means for deciding which air flow notch to connect to the elapsed time by referring to A configuration in which a switch means for connecting the air volume notch power supply.

In order to achieve the second object, the second
Means for setting whether to perform intermittent operation or not, intermittent operation setting means for setting whether to perform intermittent operation, intermittent operation recognizing means built in the microcomputer for recognizing whether or not intermittent operation is performed by the intermittent operation setting means, and intermittent operation. Intermittent operation time storage means for storing the time of operation during operation, intermittent operation repetition time storage means for storing the repetition time of intermittent operation, and the intermittent operation recognition means for determining whether or not intermittent operation is performed. During intermittent operation, refer to the intermittent operation time and the intermittent operation repetition time output from the intermittent operation time storage means and the intermittent operation repetition time storage means, and operate when the elapsed time is a stop time. It is configured to have a driving determination means for determining whether or not it is the time when it is.

[0014]

According to the present invention, the connection time of each air volume notch can be distributed to each air volume by the configuration of the above-mentioned first means.

Further, with the configuration of the second means, the ventilation air flow rate can be continuously changed by distributing and continuously switching the connection time of each air flow rate notch.

[0016]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIG.

As shown in the figure, the air volume setting means 1 capable of continuously changing the voltage from L to H and the air volume setting means 1 and the state of the voltage output from the air volume setting means 1 are fetched into the microcomputer 2, and the ventilation air volume is set. An air volume recognizing means 3 for recognizing five levels of air volume from stop A to weak operation C, strong operation E and their intermediates B and D depending on the states of voltages L to H;
Air volume notch connection distribution storage means 4 that stores the distribution of connection time of each air volume notch for each ventilation air volume, repeat time storage means 5 that stores the repetition time of connection distribution of each air volume notch, and air volume recognition means 3 Based on the five levels of ventilation air volume from stop to strong operation, the air volume notch connection distribution storage means 4 and the repetition time storage means 5 are referenced to determine which air volume notch is to be connected at the elapsed time. For example, when the ventilation air volume is weak C, only the weak notch is output by changing the port corresponding to the weak notch of the microcomputer 2 from H to L. For example, when the ventilation air volume is D, the weak notch and the strong notch are t: Since t = 1: 1, for example, the ports of the microcomputer 2 corresponding to the weak and strong air volume notches are alternately switched from H to L at 30-second intervals alternately during the repetition time of 1 minute. The air flow notches of the fan motor 7 are connected to the power source 8 by the operation determining means 6 and the H and L voltages of the ports of the microcomputer 2 corresponding to the weak and strong air volume notches output by the operation determining means 6. The switch means 9A and 9B are provided.

The actual component of the air volume setting means 1 is a variable resistor, and the voltage can be continuously changed from L = GND to H = VDD. The air volume recognizing means 3 is an A / D converter built in the microcomputer 2, and takes in the voltage output from the variable resistor to the microcomputer 2,
The air volume notch connection distribution storage means 4 is stored in advance in the ROM of the microcomputer 2. Further, the repetition time storage means 5 is also the R of the microcomputer 2 similarly.
Pre-stored in the OM, switch means 9A, 9
B is a triac of a semiconductor switch, and when the port output of the microcomputer 2 is L, the switch turns on and H
The circuit configuration is such that it turns off when.

In the above structure, when the air volume setting means 1 is adjusted to change the voltage to set the air volume, the air volume recognizing means 3 is recognized by the voltage output from the air volume setting means 1. This state is shown in (Table 1).

[0020]

[Table 1] As shown in this (Table 1), the air volume A (stop), B, C
Recognizing (weak), D, and E (strong), the air volume notch connection distribution storage means 4 stores in advance the connection time of each air volume notch for each air volume as shown in (Table 1), and the repetition time storage means 5 similarly. The connection repetition time of each air volume notch is stored in, and the operation determination means 6 is output from the air volume recognition means 3.
Then, referring to the air volume notch connection distribution storage means 4 and the repetition time storage means 5 from the air volume of five stages of A, B, C, D, and E, as shown in (Table 1), for example, when the ventilation air volume is weak C Repeats every minute, that is, continuously selects weak notches and outputs the port corresponding to the weak notch of the microcomputer 2 with L. For example, in the case of ventilation air volume of D, the weak notch and the strong notch are t: t. Since it is = 1: 1, the weak and strong air flow notches are alternately switched continuously every 30 minutes at alternate intervals and selected, and H is selected for the port corresponding to the weak notch and the port for the strong notch of the microcomputer 2. ,
The switch means 9A and 9B output the L signal, and switch the air volume notches of the fan motor 7 to the air volume notches of the fan motor 7 according to the H and L voltages of the ports of the microcomputer 2 corresponding to the weak and strong air volume notches output from the operation judging means 6. Connect the power supply 8.

As described above, according to the air volume control device for the ventilation fan of the first embodiment of the present invention, the ventilation air volume is adjusted by continuously switching and controlling the air volume notch of the fan motor 7 of the ventilation fan to control the ventilation volume. Since the air volume is changed continuously, it is possible to set a continuous ventilation air volume corresponding to a small air volume.

(Embodiment 2) Next, a second embodiment of the present invention will be described with reference to FIG.

The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. As shown in the figure, the intermittent operation setting means 10 capable of setting the voltage to L and H, and the state of the voltage output from the intermittent operation setting means 10 are taken into the microcomputer 2, and the intermittent operation is not performed when the voltage is L.
Intermittent operation recognition means 11 for recognizing intermittent operation when H
An intermittent operation time storage means 12 for storing the intermittent operation time t ′, an intermittent operation repetition time storage means 13 for storing the intermittent operation repetition time T, and an intermittent operation recognition means 11 for intermittent operation. When the intermittent operation is performed by determining whether the intermittent operation is performed or not, the intermittent operation time t ′ and the intermittent operation repetition time T stored in the intermittent operation time storage means 12 and the intermittent operation repetition time storage means 13 are compared. By referring to this, it is judged whether the elapsed time is a stop time or a driving time, and if it is an operation time, a driving judgment means 6 for outputting a voltage to a port for each notch of the microcomputer 2 and this driving judgment. Each air volume notch of the fan motor 7 is connected to the power supply 8 by the voltage of H and L of the port of the microcomputer 2 corresponding to the weak and strong air volume notches output by the means 6. Switching means 9A, a structure provided with 9B.

Further, the intermittent operation setting means 10 can switch the voltage between L and H by a switch, and the intermittent operation recognition means 11 uses an input port built in the microcomputer 2 to input the voltage L, H inputted from the switch to the microcomputer. The intermittent operation time storage means 12 is loaded into the computer 2 and stored in advance in the ROM of the microcomputer 2. The intermittent operation repetition time storage means 13 is likewise previously stored in the ROM of the microcomputer 2.

With the above structure, the intermittent operation setting means 10 outputs the voltage of L when the intermittent operation is performed, and outputs the voltage of H when the intermittent operation is not performed, and the intermittent operation recognition means 11 outputs the output L or H. When the voltage is L from the signal, it is recognized that the intermittent operation is performed, and when the voltage is H, it is recognized that the intermittent operation is not performed.

Table 2 shows the relationship between recognition of intermittent operation and whether or not intermittent operation is performed.

[0027]

[Table 2] As is clear from this (Table 2), the intermittent operation time storage means 12 stores the intermittent operation time t'in advance, and the intermittent operation repetition time storage means 13 also stores the intermittent operation repetition time T, The operation judging means 6 judges from the intermittent operation recognizing means 11 whether the operation is intermittent or not, and when the operation is intermittent, it is stored in the intermittent operation time storage means 12 and the intermittent operation repetition time storage means 13. The intermittent operation time t'and the intermittent operation repetition time T are checked to determine whether the elapsed time point is a stop time point or a running time point. A voltage is output to the port, and each air volume notch of the fan motor 7 and the power source 8 are connected by the H and L voltages of the port to operate.

As described above, according to the air volume control device for the ventilation fan of the second embodiment of the present invention, by setting the intermittent operation, it is possible to set the continuous ventilation air volume corresponding to the small air volume even during the intermittent operation. it can.

In the embodiment, the air volume setting means 1 changes the voltage continuously, but, for example, 5 steps, 1
It can be implemented in multiple stages such as 0 stage. Further, the air volume recognition means 3 recognizes the ventilation air volume in five stages, but it can be implemented in more stages. Further, although the air volume notch of the fan motor 7 has two stages, it can be implemented with one stage or more stages. Further, although the repetition time storage means 5 is stored in the ROM of the microcomputer 2, it can be set externally by providing a repetition time setting means and a repetition time recognition means. Similarly, although the intermittent operation time storage means 12 is stored in the ROM of the microcomputer 2, it can be externally set by providing an intermittent operation time setting means and an intermittent operation time recognition means. Is. further,
Although the intermittent operation repetition time storage means 13 is stored in the ROM of the microcomputer 2, it can be set externally by providing an intermittent operation repetition time setting means and an intermittent operation repetition time recognition means. .

[0030]

As is apparent from the above embodiments, according to the present invention, the ventilation air volume is adjusted by continuously switching and controlling the air volume notch of the fan motor of the ventilation fan,
By continuously changing the ventilation air volume, it is possible to set a continuous ventilation air volume corresponding to even a minute air volume, and it is possible to provide an air volume control device for a ventilation fan that does not cause electromagnetic noise during operation and has a gentle temperature change.

By setting the intermittent operation,
Even during intermittent operation, it is possible to set a continuous ventilation air volume corresponding to even a small air volume, and it is possible to provide an air volume control device for a ventilation fan whose temperature changes gently.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a ventilation fan air volume control device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of an air flow control device for a ventilation fan according to the second embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a conventional ventilation fan air volume control device.

[Explanation of symbols]

 1 air volume setting means 2 microcomputer 3 air volume recognition means 4 air volume notch connection distribution storage means 5 repetition time storage means 6 operation determination means 7 fan motor 8 power supply 9A switch means 9B switch means 10 intermittent operation setting means 11 intermittent operation recognition means 12 intermittent Hourly operation time storage means 13 Intermittent operation repetition time storage means

Claims (2)

[Claims] 1. An air volume setting means capable of continuously setting a ventilation air volume, an air volume recognition means incorporated in a microcomputer for recognizing a ventilation air volume setting output from the air volume setting means, and each ventilation air volume for each ventilation air volume. The air volume notch connection distribution storage unit that stores the distribution of the connection time of the air volume notches, the repetition time storage unit that stores the repetition time of the connection distribution of each air volume notch, and the ventilation air volume output from the air volume recognition unit are also included. And the operation determination means for determining which air flow notch to connect to when the elapsed time is referred to by the repetition time output from the air flow notch connection distribution storage means and the repetition time storage means. An air volume control device for a ventilation fan, which is provided with a switch means for connecting each air volume notch of a fan motor to a power source according to an output signal. 2. An intermittent operation setting means for setting whether or not intermittent operation is performed, and a built-in microcomputer.
Intermittent operation recognition means output from the intermittent operation setting means for recognizing whether or not to perform intermittent operation, intermittent operation time storage means for storing time to operate during intermittent operation, and intermittent operation for storing repetition time of intermittent operation Output from the intermittent operation time storage means and the intermittent operation repetition time storage means when the intermittent operation is determined by the repetition time storage means and the intermittent operation recognition means and the intermittent operation is performed. The operation judging means for judging whether the elapsed time is a stop time or a driving time is provided by referring to the intermittent operation time and the intermittent operation repetition time.
An air flow controller for the ventilation fan described.