JPH06182143A - Air purifier - Google Patents

Abstract

PURPOSE:To provide a small-sized safe air purifier exposing an objective space to ozone, eliminating the effect of ozone on a human body by a human body detection sensor and an ozone sensor and not damaging the deodorizing/ sterilizing effect of ozone. CONSTITUTION:The presence of a person is detected by a human body detection sensor 5 and, when the person is present, the concn. of ozone at an ozone generating blowoff port is controlled so as to exert no effect on a human body and, when no person is present, the concn. of ozone in an objective space is controlled so as to exert no effect on the human body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifier for exposing ozone to a room.

[0002]

2. Description of the Related Art Conventionally, air purifiers using the deodorizing and sterilizing effects of ozone have been commercially available. However, since ozone affects the human body, indoor air is sucked into the air purifier and Deodorizing and sterilizing with ozone, and after decomposing ozone, clean air is emitted. However, this has the drawback that the air purifier for replacing the indoor air becomes large in proportion to the size of the room, and it takes a deodorizing time to replace the indoor air because it does not directly expose ozone. The deodorizing efficiency was poor, and it had a drawback that bacteria adhering to the room could not be sterilized. For this reason, a method of controlling the ozone concentration in the room to a concentration that does not affect the human body by using an ozone sensor and a method of generating ozone only when there is no person by detecting the presence or absence of a person by a human body detection sensor are used. It was

[0003]

However, when controlling the ozone concentration in the room to a concentration that does not affect the human body, there is a drawback that the high concentration of ozone at the ozone generation outlet is exposed to humans, and human body detection is possible. When the presence of a person is detected by a sensor and ozone is generated only when there is no person, there is a drawback that deodorization and sterilization cannot be performed when there is a person.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems. The means is to detect the presence or absence of a person by a human body detection sensor and, if there is a person, an ozone generation outlet. The air purifier is characterized in that the ozone concentration of the human body is controlled so that it does not affect the human body, and when there is no person, the ozone concentration of the air intake of the target space is controlled to a concentration that does not affect the human body. That is.

[0005]

The present invention is an air purifier that utilizes the deodorizing and sterilizing effect of ozone, and is characterized by performing deodorizing and sterilizing indoors without the influence of ozone on the human body by the human body detection sensor and the ozone sensor.

The presence or absence of a person can be detected by using a pyroelectric infrared sensor or an ultrasonic sensor. When a person is present, the ozone sensor at the outlet for ozone generation detects the ozone concentration at the outlet and controls it to a concentration that does not affect the human body, so that the human body will not be affected even if the person is directly exposed. When no person is present, the ozone concentration in the entire room may be set to a concentration that does not affect the human body, instead of the ozone concentration at the ozone generation outlet. At this time, as a method for detecting the ozone concentration in the room, there are a method in which an ozone sensor is installed at the air inlet and the ozone concentration at the air inlet is detected, and a method using the ozone sensor at the ozone generation outlet is used. In the method of using the ozone sensor of the ozone generation outlet, ozone generation is intermittently operated to detect the ozone concentration when the air in the room sucked when the ozone is not generated is directly discharged from the outlet.

By the above-mentioned method, the size of the air purifier can be reduced, and ozone that does not affect the human body is always supplied to the room to deodorize and sterilize the room.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. Example 1 FIG. 1 shows a schematic diagram of an example of the present invention. An intake fan 2 and an ozone generator 3 are installed in the case 1, and an ozone sensor 6 and an ozone sensor 6 are provided at the indoor air inlet and the ozone outlet, respectively.
Install 4. At this time, the pyroelectric infrared sensor 5 is installed at the ozone generation outlet to detect the presence or absence of a person near the ozone generation outlet. In this case, a small ozone generator, which is a ceramic discharge body, is used as the ozone generator 3.

When there is a person, the ozone sensor 4 controls ON / OFF of the ozone generator 3 so that the ozone concentration at the ozone outlet is 0.05 to 0.1 ppm or less. When there is no person, the ozone sensor 5 controls ON / OFF of the ozone generator 3 so that the ozone concentration at the indoor air inlet is 0.05 ppm or less.

Embodiment 2 FIG. 2 shows a schematic view of another embodiment of the present invention. As a structure, the ozone sensor 6 of FIG. 1 is removed. When there is a person, the same operation as in the first embodiment is performed. When there is no person, the ozone generation unit is intermittently operated to control the ozone concentration at the ozone generation outlet when the ozone is not generated to be 0.05 ppm or less. When the ozone concentration at the ozone generation outlet becomes 0.05 ppm, the ozone generation is turned off, and when it becomes lower than 0.05 ppm, the intermittent operation of ozone generation is started.

[0011]

As described above, the present invention eliminates the influence of ozone on the human body by the human body detection sensor and the ozone sensor, and provides a small and safe air purifier without impairing the deodorizing and sterilizing effect of ozone. be able to.

[0012]

[Brief description of drawings]

FIG. 1 is a schematic view of an embodiment of the present invention.

FIG. 2 is a schematic view of another embodiment of the present invention.

[Explanation of sign]

 1 Case 2 Inhalation fan 3 Ozone generator 4 Ozone sensor 5 Human body detection sensor 6 Ozone sensor

Claims (3)

[Claims] 1. An air purifier that exposes ozone to a target space, wherein the presence or absence of a person is detected by a human body detection sensor,
Air purification characterized by controlling the ozone concentration at the ozone generation outlet to a concentration that does not affect the human body when there is a person, and controlling the ozone concentration in the target space to a concentration that does not affect the human body when there is no person. vessel. 2. The air cleaner according to claim 1, wherein an ozone sensor is installed at each of the ozone generation outlet and the air inlet of the target space to detect the ozone concentration of the ozone generation outlet and the ozone concentration of the target space. vessel. 3. The air according to claim 1, wherein an ozone sensor is installed only at the ozone generation outlet to intermittently operate the ozone generation and to sense the ozone concentration in the target space when the ozone generation is not performed. Purifier.