JP2532708B2 - air purifier - Google Patents

Description

TECHNICAL FIELD The present invention relates to an air purifier used in a house or an automobile.

2. Description of the Related Art In recent years, air purifiers have been widely used to improve indoor environments. The conventional air purifier of this type generally has a configuration as shown in FIG. 4 and FIG. The configuration will be described below.

As shown in FIG. 4, two opposite side surfaces of the main body 1 have an intake port 2 and an exhaust port 3 so that the air sucked from the intake port 2 is purified in the main body 1 and discharged from the exhaust port 3. Has become. The gas sensor 4 is horizontally attached to the side surface of the main body 1, and the control circuit operates the airframe according to the gas concentration of the outside air from the vent 5.

Further, in FIG. 5, the position of the vent hole 5 is provided on the upper surface of the main body 1. This is because when the airframe is installed in a narrow place (for example, in an automobile), the side surfaces A and B are often covered by the structure of the mounting portion. That is, the sensor 4 is attached to the upper surface of the main body 1 with the top facing upward, and the vent hole 5 for the outside air is provided in the upper portion of the gas sensor 4 to increase the detection sensitivity of the outside air.

According to such a conventional configuration, when it is installed in a narrow space such as an automobile, the configuration shown in FIG. If the user has accidentally spilled it on the upper part of the main body 1 with a drink or the like, the gas sensor 4 can be inserted through the vent 5.
There is a high risk that it will lead to malfunction. In particular, liquids containing electrolytes such as salt, and liquids containing components such as sugars that tend to stick are seriously damaged. However, if the vent hole 5 is not provided on the upper surface, the detection sensitivity of the gas sensor 4 is lowered, and it is difficult to obtain sufficient detection sensitivity even if the vent hole is provided only on the side surface.

The present invention solves the above problems and provides a gas sensor vent hole on the upper surface of the main body so that it can be used in a small installation place, and even if water or the like is accidentally spilled, a failure occurs. It is an object of the present invention to provide an air purifier that does not generate air pollution and can prevent the sensitivity of the gas sensor from decreasing.

Means for Solving the Problems In order to achieve the above object, the present invention provides, as a first means for solving the problems, a fan that circulates air in a main body and a fan that senses dirt in the air to control the fan. A gas sensor, a storage unit for storing the gas sensor in the upper part of the main body, and an opening provided on the upper surface of the storage unit,
The opening is arranged within a range in which outside air can be taken into the gas sensor by a ventilation effect due to heat generation of the gas sensor, and the gas sensor and the opening do not overlap in a plane. As a second means for solving the problem, a second opening is provided on the side surface of the housing of the gas sensor, and the second opening is provided.
The gas sensor is arranged almost in the middle of the opening of the above and the opening of the upper surface of the housing.

As a third means for solving the problem, a gutter-shaped water receiver having an area equal to or larger than the opening is provided below the opening provided on the upper surface of the gas sensor housing.

Action According to the present invention having the above-described configuration, in the first problem solving means, since the gas sensor and the opening are arranged at positions not overlapping with each other, water flowing in through the opening does not drop onto the gas sensor. Also, since the opening provided on the upper surface of the storage part is set within the range where the outside air outside the main body can be taken into the gas sensor, dirt on the outside air can be easily detected and the gas sensor itself Due to the ventilation effect that the ascending airflow due to heat generation is released from the opening, the outside air can be taken into the vicinity of the gas sensor and the sensitivity of the gas sensor can be improved. According to the second problem solving means, the second opening is arranged on the side surface of the storage portion, so that the outside air is generated by the rising airflow caused by the heat generation phenomenon by the heater in the gas sensor.
Will be introduced into the storage part from the opening part and will be discharged from the opening part on the upper surface, thereby improving the sensor sensitivity by introducing the outside air into the vicinity of the gas sensor.

In the third means for solving the problem, since the water receiver is provided under the opening on the upper surface, it is possible to prevent the liquid flowing from the opening near the sensor from being scattered, and to lead the liquid to a harmless place. Since the space is provided between and, the function of the opening as the communication part between the gas sensor housing and the outside air is not lost, and the failure due to the inflow of water or the like into the sensor can be prevented.

Example Hereinafter, an example of the present invention will be described with reference to FIGS. 1, 2, and 3. The same components as those of the conventional example will be described with the same reference numerals.

As shown in the figure, the main body 1 of the air purifier takes in outside air from a front air inlet 2 by a built-in blower (not shown), removes dust, odor, etc., and then discharges it from an exhaust port 3 on the rear surface. It is like this. The operation of the blower can be switched by operating the operation button 7 provided on the storage section 6 attached to the upper surface of the main body, and when "automatic operation" is selected, the gas sensor 8 built in the storage section 6 senses and outputs it. The blower is operated accordingly. FIG. 1 shows a configuration relating to the first problem solving means. An opening 9 is provided on the upper surface of the storage portion 6, and this opening 9 is provided outside the main body 1 due to a ventilation effect due to heat generation of the gas sensor 8. Within the range in which outside air can be taken into the gas sensor 8, and the gas sensor 8 and the opening 9
Are arranged so that they do not overlap in a plane.

According to the above configuration, it is possible to prevent the water in the cup placed on the main body 1 from accidentally splashing on the gas sensor 8 even if water accidentally flows in the direction of the arrow of the opening 9. Further, since the opening 9 provided on the upper surface of the storage portion 6 is set within a range in which the outside air outside the main body 1 can be taken into the gas sensor 8, it is possible to easily detect the contamination of the outside air. Due to the ventilation effect in which an ascending air flow due to the heat generation of the gas sensor 8 itself is released from the opening 9, the outside air can be taken into the vicinity of the gas sensor 8 and the sensitivity of the gas sensor can be improved.

FIG. 2 shows the configuration according to the second means for solving the problem, and the second opening 10 is provided on the side surface of the storage portion 6 to form the second opening 10.
The inside of the storage portion 6 from which the ascending air current generated by the heat generation of the internal heater of the gas sensor 8 flows out of the second opening 10 as shown by the arrow b in FIG. It becomes pressure and air flows in from the outside of the machine. Therefore, even when the second opening 10 is not directly above the gas sensor 8, the sensitivity of the gas sensor 8 can be improved by introducing the outside air into the vicinity of the gas sensor 8 by this rising airflow. In this way, by installing the gas sensor 8 between the opening 9 and the second opening 10 on the upper surface of the storage section 6, it is possible to use the airflow efficiently.

FIG. 3 shows the configuration according to the third means for solving the problems. A water receiver 11 is provided inside the storage unit 6, and the water receiver 11 is provided so as to cover the opening 9 in a planar manner. It is provided with a gap from the inner surface. As a result, the liquid flowing in through the opening 9 is collected by the water receiver 11 and discharged from the drain 12 of the water receiver 11 to a harmless portion. At this time, since there is a space α between the opening 9 and the water receiver 11, the sensitivity of the gas sensor 8 is not greatly affected, and the splash of water can be reliably prevented.

EFFECTS OF THE INVENTION As is clear from the above description of the embodiments, according to the first means for solving the problems of the present invention, in order to control the blower which circulates the air in the main body and the dirt by sensing the air. Gas sensor, a storage unit for storing the gas sensor, and an opening for guiding air to the gas sensor on the upper surface of the storage unit in the vicinity of the gas sensor, and the gas sensor and the opening do not overlap in plan view. And place it again
According to the means for solving the problems described above, the second opening is provided on the side surface of the storage part, and the gas sensor is arranged approximately at an intermediate part between the second opening and the opening provided on the upper surface of the storage part. According to the problem solving means of 3, the water receiver is provided so as to cover the opening provided on the upper surface of the storage portion, and the gap is provided between the water receiver and the inner wall of the opening, which depends on the installation location. Without increasing the sensitivity of the gas sensor, even if the user accidentally spills the liquid, the liquid does not come into contact with the gas sensor, and an air purifier with high sensing performance and high reliability can be provided.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of an essential part of an air purifier according to an embodiment of the first problem solving means of the present invention, and FIG. 2 is an air purifier according to an embodiment of the second problem solving means of the present invention. FIG. 3 is an enlarged cross-sectional view of an essential part of an air purifier of one embodiment according to the third problem solving means, and FIGS. 4 and 5 are perspective views of an air purifier of a conventional example. Is. 1 ... Main body, 6 ... Storage section, 8 ... Gas sensor, 9 ...
… Aperture, 10 …… Second aperture.

Claims (3)

(57) [Claims] 1. A blower for circulating air in a main body, a gas sensor for controlling the blower by detecting dirt on the air, a storage section for storing the gas sensor in an upper part of the main body, and the storage section. An opening provided on the upper surface of the gas sensor, the opening being within a range in which outside air outside the main body can be taken into the gas sensor by a ventilation effect due to heat generation of the gas sensor, and the gas sensor and the opening are planar. An air purifier that is arranged so that it does not overlap. 2. The air according to claim 1, wherein a second opening portion is provided on a side surface of the storage portion, and a gas sensor is arranged substantially at an intermediate portion between the second opening portion and the opening portion provided on the upper surface of the storage portion. Purifier. 3. The air purifier according to claim 1, wherein a water receiver is provided to cover the opening provided on the upper surface of the housing, and a gap is provided between the water receiver and the inner wall of the opening.