JPH05212230A - Air cleaner - Google Patents

Abstract

PURPOSE:To effectively introduce fresh air with energy loss restrained by installing a shutter for adjusting the introduced quantity of fresh air and controlling the opening and closing of the shutter according to the gas concentration in a room detected by a gas sensor. CONSTITUTION:A fan 2, a fan driving motor 3, a dust collecting filter 6 and a deodorizing filter 7 are installed in a body frame 1. At the end of a ventilation passage on the air intake side, a conventional indoor air intake opening 9 and a fresh air intake opening 11 are provided, and near the fresh air intake opening 11, a shutter 13 is provided which is opened and closed according to the gas concentration detected by a gas sensor 15. Thereby, when the gas concentration in the room is increased, fresh air is automatically introduced to prevent the harmful influence of noxious gas on human body, shortening the time for cleaning air. Simultaneously, the opening degree of to shutter 13 is adjusted according to the gas concentration by the action of a control circuit, causing energy loss on air-conditioning to be decreased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to an air cleaner for cleaning indoor air.

[0002]

2. Description of the Related Art In recent years, air purifiers have been widely used as airtightness of buildings and awareness of health and hygiene have increased.

Conventionally, this type of air cleaner generally has a structure as shown in FIG. As shown in the figure, the dirty air in the room sucked into the main body through the intake port 101 is
The dust collecting filter 102 removes dust and the like, and the deodorizing filter 103 adsorbs the malodorous component to form clean air, which is returned to the room from the air outlet 105 by the blower 104.

[0004]

In such a conventional air cleaner, since the deodorizing filter 103 is mainly composed of activated carbon, it is impossible to remove toxic carbon monoxide generated from a combustion instrument or the like, and combustion is performed. Ventilation of the room is required when using the equipment.

However, the air purifier is sometimes misunderstood as being capable of cleaning all odorous components and toxic gases in the air including toxic gas, and in that case, ventilation is not sufficiently performed. Therefore, there is a problem that the concentration of toxic gas such as carbon monoxide in the room gradually increases.

Further, the deodorizing ability is generally low as compared with the dust collecting ability of the air purifier, and even if the dust of tobacco is removed quickly,
There has been a problem that it takes a considerably long time to completely remove the tobacco gas component from the room so that no odor remains. Furthermore, if ventilation is frequently performed to reduce the concentration of toxic gas in the room, there is a problem that the heat load during heating and cooling increases.

The present invention solves the above-mentioned problems, and when the concentration of carbon monoxide or other malodorous gas is high in the room, the toxic gas is lowered to reduce the adverse effect on the human body and to remove the odor. The first purpose is to shorten the operation time.

A second object is to reduce energy loss in the room during cooling and heating due to introduction of outside air.

[0009]

A first means for achieving the first object of the present invention is to provide a fan-mounted motor built in a main body and a collecting member provided in an intake side ventilation passage of the fan. A dust filter and a deodorizing filter, and an outside air intake port and an indoor intake port that are provided by branching at the tip of the intake side ventilation passage,
A shutter that adjusts the intake flow rate of the outside air intake port and the indoor intake port, a shutter drive motor that drives this shutter, a gas sensor that detects the gas concentration in the room, and the shutter drive that receives a signal from this gas sensor. The configuration includes a control circuit for controlling the motor.

A second means for achieving the second object is that the control circuit controls the shutter drive motor according to the magnitude of the gas concentration detected by the gas sensor to adjust the opening angle of the shutter. It has the structure according to claim 1.

[0011]

According to the present invention, the gas sensor detects the concentration of indoor carbon monoxide or other malodorous gas by the constitution of the above-mentioned first means, and when the detected concentration exceeds a certain level, the outside air is automatically released. The outside air is introduced by opening the intake port to reduce the gas concentration in the room, and the outside air intake port is closed when the detected concentration level falls below a certain level.

Further, since the opening of the shutter of the outside air intake port is adjusted according to the size of the gas concentration in the room by the structure of the second means, a large amount of outside air is introduced to increase the room air temperature. When the gas concentration is low, the external air introduction amount can be suppressed as much as possible to reduce the heat load.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG. As shown in the figure, an air blower 4 including a fan 2 and a fan drive motor 3 is built in a substantially rectangular parallelepiped main body 1, an air outlet 5 is opened on the lower surface of the main body 1, and a dust collecting filter 6 is provided on the intake side of the blower 4. A deodorizing filter 7 is attached. The main body 1 is provided with a display unit 8 for displaying the operating state on the front surface, an indoor intake port 9 is provided on the upper surface for taking in indoor air into the main body, and a rear surface penetrates a wall surface 10 to open to the outside. It has an outside air intake port 11.

Both the indoor intake port 9 and the outside air intake port 11 communicate with the intake side ventilation passage 1a of the blower unit 5, and the outside air intake port 11
A shutter 13 is provided close to. Shutter 1
3 can be opened and closed by driving the shutter drive motor 12. Further, a gas sensor 15 is built in the main body 1, and the gas sensor 15 has a slit 14 formed in the main body 1.
It is installed facing the.

Explaining the circuit system, as shown in FIG. 2, the control circuit 17 connected to the power source 16 is the operation circuit 1.
The fan drive motor 3 is operated by receiving the signal from 8.
Further, the control circuit 17 inputs the output from the gas sensor 15 into the detection circuit 19, and by making this value correspond to the reference level stored in the control circuit 17, the shutter drive motor 12 is operated to open / close the shutter 13. . That is, FIG.
As shown in, the shutter 13 is closed when the gas concentration is low, and the shutter 13 is opened when the gas concentration is higher than the reference level gas concentration C1.

With the above construction, when the air purifier is in operation, there is little air pollution due to gas components such as carbon monoxide when the air pollution is comparatively small or even when dust due to house dust or the like is large. In this case, since the dust collecting function alone is sufficient, the shutter 13 is closed, the dirty air in the room is taken into the main body 1 through the indoor intake port 9, and the air taken in by the dust collecting filter 6 and the deodorizing filter 7 is purified. Then, the air is discharged from the air outlet 5 of the air blower 4 into the room. Further, when the air pollution due to the gas component becomes higher than the gas concentration C1, the shutter 13 is opened and the outside air is introduced from the outside air intake port 11 to the indoor intake port 9
Both the air and the indoor air introduced from are passed through the dust collecting filter 6 and the deodorizing filter 7 to be purified, and the air blower 4
It is discharged into the room through the blow-out port 5. In this case, since the outside air is introduced, the gas concentration in the room decreases relatively quickly due to the ventilation effect, and when the gas concentration falls below the gas concentration C1, the shutter 13 is automatically closed and only the indoor intake port 9 is opened. Change

As described above, according to the air cleaner of the first embodiment of the present invention, when the concentration of toxic gas such as carbon monoxide in the room which cannot be cleaned by the conventional air cleaner or other malodorous gas becomes high. , Because the gas sensor 15 automatically detects and opens the shutter 13 to introduce the outside air,
There is no danger of carbon monoxide poisoning and so on, the safety is excellent and the indoor air can be cleaned faster than conventional ones.

Next, a second embodiment of the present invention will be described with reference to FIGS. 1 to 3, 5 and 6. The first
The same components as those in the embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the figure, the opening of the shutter 13 can be adjusted by the function of the control circuit 17 according to the gas concentration in the room detected by the gas sensor 15. At this time, as shown in FIGS. 5 and 6, the opening degree of the shutter 13 can be continuously or stepwise increased by controlling the shutter drive motor 12 according to the magnitude of the gas concentration.

With the above structure, if the gas concentration becomes high, the amount of introduced outside air can be increased, and the gas concentration in the room can be promptly reduced by the ventilation effect. Further, when the gas concentration is low, the amount of introduced outside air is reduced, the energy loss during cooling and heating due to excessive introduction of outside air is eliminated, and the amount of introduced outside air can be made appropriate according to the gas concentration.

As described above, according to the air cleaner of the second embodiment of the present invention, by adjusting the amount of introduced outside air according to the magnitude of the gas concentration, when the gas concentration in the room is high, the pollution is caused by the ventilation effect. In addition to immediately purifying the air, when the gas concentration in the room is low, it is possible to reduce the heat load during operation of the heating / cooling equipment and realize energy saving.

[0022]

As is apparent from the above embodiments, according to the present invention, when the concentration of carbon monoxide or other malodorous gas in the room becomes high, the air is automatically introduced into the outside air to prevent the harmful effect of the toxic gas. It is possible to provide an air purifier that can be avoided and that has the effect of reducing the odorous components that are difficult to remove in a shorter time than before.

Further, by adjusting the opening of the shutter for taking in the outside air according to the magnitude of the gas concentration in the room, not only can the contaminated air in the room be efficiently purified, but the energy loss in the room during cooling and heating can be reduced. As a result, an air purifier with an energy saving effect can be provided.

[Brief description of drawings]

FIG. 1 is a sectional view of an air cleaner according to a first embodiment and a second embodiment of the present invention.

FIG. 2 is a block circuit diagram of the same.

FIG. 3 is a perspective view of the same.

FIG. 4 is a graph showing the relationship between the open / closed state of the shutter and the indoor gas concentration according to the first embodiment.

FIG. 5 is a graph showing the relationship between the open / closed state of the shutter and the continuous change of the indoor gas concentration according to the second embodiment.

FIG. 6 is a graph showing the relationship of the same gradual change.

FIG. 7 is a sectional view of a conventional air cleaner.

[Explanation of symbols]

 1 main body 1a intake side ventilation passage 2 fan 3 motor 6 dust collecting filter 7 deodorizing filter 9 indoor intake port 11 outside air intake port 12 shutter drive motor 13 shutter 15 gas sensor 17 control circuit

Claims (2)

[Claims] 1. A motor equipped with a fan built into a main body, a dust collecting filter and a deodorizing filter provided in an intake side ventilation passage of the fan, and an outside air intake port provided at a tip of the intake side ventilation passage. And an indoor intake port, and a shutter for adjusting the intake flow rate of the outside air intake port and the indoor intake port,
An air purifier comprising a shutter drive motor for driving the shutter, a gas sensor for detecting a gas concentration in a room, and a control circuit for receiving a signal from the gas sensor and controlling the shutter drive motor. 2. The air purifier according to claim 1, wherein the control circuit controls the shutter drive motor according to the magnitude of the gas concentration detected by the gas sensor to adjust the opening angle of the shutter.