JPS621498B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Technical Field> The present invention relates to an air conditioner with an automatic ventilation function that detects indoor pollution and automatically performs ventilation operation.

<Background/Prior Art and its Problems> Many ordinary houses in recent years have highly airtight structures, but cigarette smoke, combustion gas from gas/kerosene, or other harmful gases can leak inside such houses. When it occurs, it does not disappear easily, so indoor air becomes polluted, which is not a good thing for people inside the room.

In particular, the room is often closed off during cooling or heating, and the indoor air becomes more likely to become polluted as in the situation described above.

Therefore, ventilation can be done according to the level of contamination, but the level of contamination is not something that can be seen with the naked eye.
Ventilation, which requires opening windows and operating ventilation fans at appropriate intervals, is troublesome.

Also, of course, the cleaner the air, the better, but it is not preferable from the point of view of energy conservation to ventilate the air indiscriminately during cooling or heating operation.

From the above point of view, it is conceivable to detect the indoor pollution level using, for example, a CO ₂ sensor or a gas sensor, and to perform an appropriate amount of ventilation according to the level of this sensor.

As this type of conventional technology, for example,
The one described in Publication No. 134240 is known.
The device disclosed in the publication uses a CO ₂ sensor to detect the degree of air pollution, drives a damper motor based on the detection result, and adjusts the opening angle of the damper driven by the damper motor to adjust the ventilation amount. It will be adjusted.

However, the ventilation device disclosed in the above publication,
The amount of ventilation corresponding to the output of the CO ₂ sensor is determined to a predetermined value, in other words, only a specific amount of ventilation corresponding to the degree of pollution can be performed.

On the other hand, it is conceivable to set a set value for the level at which ventilation should be performed when performing ventilation using a sensor, and when the degree of contamination reaches the set value, drive a damper, fan, etc. to perform ventilation. (In the field of ventilation fans, etc., there are devices that drive ventilation fans when a predetermined pollution level is reached, based on the output of a pollution sensor.) However, this is also based on a predetermined set value. Since ventilation is carried out at the same time, only a specific amount of ventilation can be obtained for a specific amount of contamination.

However, the level of air pollution in a room varies depending on the location (e.g., movie theaters, tearooms, and other high-traffic stores, classrooms, offices, living rooms and bedrooms at home, etc.)
They are completely different, and depending on the time of day, there are times when there is less pollution and times when there is more.

Furthermore, the level of perceived cleanliness is subjective and varies depending on preference.

Nevertheless, in conventional ventilation systems,
Because the amount of ventilation and the level of perceived cleanliness are both fixed, it is not possible to provide flexible ventilation according to location, time of day, and preference.

<Purpose> The present invention enables users to freely set the level at which they feel clean and the level at which ventilation should be carried out using simple operations, thereby enabling flexible ventilation according to location, time, and preference. The purpose is to

<Means for solving ventilation problems> A pollution sensor that converts the indoor pollution state into an electrical signal is installed, and the ventilation level is set by operating the operating means. A ventilation level adjusting means for changing the corresponding electrical signal is provided, a determining means is provided for comparing the outputs of both, and a means is provided for notifying that the two outputs match. It is designed to drive.

It is well known that the above-mentioned pollution sensor has a resistance value that decreases depending on the amount of pollution, for example. As the above-mentioned operating means, for example, one that changes the set level by sliding a knob, and one that operates a displayed numerical value using a key switch for raising or lowering are well known.

For example, a well-known device that operates a knob is a slide volume whose resistance value changes depending on the slide of the knob. It is well known that a key switch is operated, in which a digital signal corresponding to a displayed numerical value is re-stored by operating the key switch.

A comparator that compares voltage values based on changes in resistance values is well known as a device for determining whether the levels match. If the signal level is binary processed, the signal is output based on signal matching.
Devices such as ICs and LSIs (so-called microcomputers) are well known. As the notification means, it is sufficient to notify the user, and a lamp, a display element such as an LCD, a buzzer, etc. are well known.

As ventilation means, a combination of a damper and a fan, a ventilation fan, a simple blower, etc. are well known.

Ventilation itself is also air conditioning, and the air conditioner of the present invention only needs to be able to ventilate.

<Function> First, to adjust the level at which the air feels clean to each condition, when the current air condition feels clean, operate the operating means and use the notification means to set the level detected by the sensor. Change the ventilation level to a level that confirms that both levels match. The ventilation level obtained by this operation is the current level that feels clean, and based on the level obtained by this operation, this obtained level, that is, the current contamination level (the user must Use the operating means to lower the level of ventilation so that ventilation is performed when the level of contamination has progressed beyond the level at which it is felt that it is not.

The level obtained by the notification from the notification means when you feel clean is the "level you feel clean" selected according to various conditions such as preference, and this "level you feel clean" is the standard. The newly set level is the ventilation level selected by the user, and the operation of the ventilation means is controlled according to the ventilation level selected by the user. This reduction from the above-mentioned ``level that feels clean'' to a predetermined level is the ``adjustment of the ventilation level'' that is adjusted by the user, and this ``adjustment of the ventilation level'' is adjusted by the user. This can be done freely depending on the time, preference, etc.

<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a characteristic diagram of a pollution level sensor used in an air conditioner with an automatic ventilation function according to the present invention.

This pollution level sensor has characteristics as shown in FIG. That is, the resistance value of the pollution level sensor 2 shows a high value in clean air, and when the atmosphere becomes polluted, the resistance value decreases, and depending on the degree of pollution (A, B, C in Figure 1). Gas sensors have the characteristic that the resistance value decreases in different ways.

Fig. 2 is a control circuit diagram of an air conditioner with an automatic ventilation function according to the present invention, which is equipped with a pollution level sensor, in which 1 is a constant voltage DC power supply, 2 is a pollution level sensor, and 3 is an example of a ventilation level adjustment section. Slide volume, 4
is an LED, 5 is a ventilation damper opening/closing relay, 6 is a ventilation damper opening/closing circuit and ventilation damper, 7~
22 is a resistor, 23 is a comparator, 24 and 25 are diodes, 26 is a transistor, and 27 and 28 are capacitors.

Figure 3, , 〓 is slide volume 3
29 is the knob, A is the position when LED 4 is on, B is the position when LED 4 is off, C is the position when you want to ventilate on the pollution level L side,
D indicates the position when ventilation is desired on the pollution level H side.

Next, the method and operation of adjusting the level of contamination to be ventilated in this air conditioner with an automatic ventilation function will be explained with reference to FIGS. 2 and 3.

First, when the person using this air conditioner with automatic ventilation function feels that the air is clean, move the knob 29 of the slide volume 3 to the high resistance value side as shown in Figure 3, and stop at the position A where the LED 4 lights up. This position A is in balance with the clean air level detected by the pollution level sensor 2, that is, the current air level that the user feels is clean air, and in this state, the ventilation damper opening/closing circuit and the ventilation damper 6 are turned on. Become.

Next, at this point, move the knob 29 of slide volume 3 to the lower resistance value side, and the LED 4
There are places where the lights go out and the ventilation damper opening/closing circuit and ventilation damper 6 are turned off. At this position B, stop the knob 29 of the slide volume 3.
This position B varies depending on the circuit constants of the resistors 7 to 19, etc., but is determined by setting appropriate resistance values, and is in balance with the normal ventilation level detected by the pollution level sensor 2.

After making these adjustments, normal air conditioning operation begins, but if you run the air conditioning in a closed room, the air in the room will gradually become contaminated. When the air in the room becomes polluted, the resistance value of the pollution level sensor 2 decreases, for example, as shown in the curve for pollution A (or pollution B, pollution C, etc.) in Figure 1, and becomes below the normal ventilation level mentioned above. Then, the negative side of the comparator 23 has a lower potential than the positive side, so the comparator 2
The output of No. 3 becomes "H" level. Therefore, conduction of the diode 24 is prevented, and conversely, the conduction of the diode 24 is prevented.
5 becomes conductive and LED 4 lights up. At the same time, current also flows through relay 5, turning on the ventilation damper opening/closing circuit and ventilation damper 6, and starting ventilation operation.

On the other hand, as the air in the room becomes cleaner due to ventilation operation, the resistance value of the pollution level sensor 2 increases, and eventually the - side of the comparator 23 becomes higher in potential than the + side, so the comparator 2
The output of No. 3 becomes "L" level. Therefore, the diode 24 becomes conductive, and conversely, the diode 25 is prevented from being conductive, and the LED 4 turns off.
At the same time, current no longer flows to relay 5, and ventilation operation is stopped.

Ventilation operation is repeated in this manner.

The normal ventilation level can be determined as described above, but as shown in Figure 3, the slide volume 3 knob 29
Adjusting to position C on the high resistance value side allows ventilation operation at a lower pollution level than the normal ventilation level, and adjusting knob 29 of slide volume 3 to a lower value than position B, which corresponds to the normal atmospheric level, as shown in Figure 3. When adjusted to position 2 on the resistance value side, ventilation operation can be performed at a higher contamination level than the normal ventilation level. These ventilation levels can be adjusted as appropriate by the user according to his/her preference.

In this way, the ventilation level can be adjusted according to the user's preference, and the pollution sensor 2 will constantly monitor the ventilation damper 6, which will automatically open when the air pollution level in the room reaches the set ventilation level. When the ventilation operation is started and the air in the room becomes clean, the ventilation damper 6 is closed and the ventilation operation is stopped. This will be repeated from time to time depending on the state of air pollution in the room.

In this way, the air condition in the room can be controlled to a level that satisfies the user.

In addition, since the air in the room is uneven at the beginning of operation of an air conditioner with an automatic ventilation function, the ventilation level should be set after a time lag of several minutes has been established from the start of operation.

Although the case where a gas sensor is used as the pollution level sensor has been described above, the present invention is not limited to this and may be any other device as long as it achieves the same purpose. For example, if the target is pollution such as cigarette smoke or dust, a photoelectric sensor or the like may be used, such as a smoke sensor, in which the output current changes in accordance with the degree of pollution by utilizing a light scattering phenomenon.

Note that if the type of pollution level sensor changes, the control circuit must also be changed to an optimal one.

<Effects> According to the present invention, the level at which people feel clean and the level at which ventilation should be performed can be freely set according to conditions such as location, time of day, and preference. Automatic ventilation can be performed.

However, in setting the above-mentioned level, it is sufficient to operate the operation means based on the notification means, which is convenient for the user.

[Brief explanation of the drawing]

FIG. 1 is a characteristic diagram of a pollution degree sensor used in an air conditioner with an automatic ventilation function according to the present invention, and FIG. 2 is a control circuit diagram of an air conditioner with an automatic ventilation function according to the present invention equipped with a pollution degree sensor. Figures 3 and 3 are diagrams showing how to adjust the ventilation level in the air conditioner with automatic ventilation function of the present invention. 2: Pollution level sensor, 3: Slide volume,
4: LED, 5: Ventilation damper opening/closing relay,
6: Ventilation damper opening/closing circuit and ventilation damper.

Claims (1)

[Scope of Claims] 1. A device that is provided with a pollution sensor that converts the state of pollution of indoor air into an electrical signal and that performs ventilation based on the electrical signal output from the pollution sensor, which sets the level at which ventilation should be performed. A ventilation level adjusting means is provided corresponding to the level of ventilation to be performed by operating the operating means, and an electrical signal corresponding to the ventilation level set by the ventilation level adjusting means is compared with the electrical signal of the pollution sensor. A determining means is provided, and based on a comparison result of the determining means, a means is provided for notifying a match when the electrical signals corresponding to both levels match, and a means is provided for driving the ventilation means at the time of said matching. Air conditioner with automatic ventilation function.