JP2017053538A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cleaner capable of easily detecting a change of an indoor state caused by opening/closing of a door and a window, etc. and promptly and efficiently collecting contaminants, such as dust and odor, intruding from an outdoor side to an indoor side.SOLUTION: An air cleaner includes: a casing 2; an atmospheric pressure sensor 7 for detecting atmospheric pressure around the casing; atmospheric pressure storage means for continuously storing values of the atmospheric pressure detected by the atmospheric pressure sensor; atmospheric pressure change amount detection means for detecting atmospheric pressure change amount per unit time of the atmospheric pressure stored in the atmospheric pressure storage means; and control means for setting output of air blowing means 5 to an atmospheric pressure mode of performing an operation at a level equal to or higher than predetermined high output when the atmospheric pressure change amount detected by the atmospheric pressure change amount detection means is equal to or larger than a predetermined atmospheric pressure change threshold value. This configuration can obtain effects, such as easy detection of a change of an indoor state caused by opening/closing of a door and a window, etc. from the change amount of the atmospheric pressure and prompt and efficient collection of contaminants, such as dust and odor, intruding from an outdoor side to an indoor side before the contaminants accumulate.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an air purifier that collects contaminants such as dust and smell that enter the room from the outside.

  Conventionally, this type of air purifier senses indoor doors, windows, and the like by ultrasonic waves and image recognition, and detects changes in indoor conditions, such as opening and closing of doors and windows. An air cleaner is known that controls operation according to the detected indoor state change and collects contaminants such as dust and odor that enter the room from the outside (see, for example, Patent Document 1). ).

  Hereinafter, the air cleaner will be described with reference to FIG.

  As shown in FIG. 8, the air purifier 100 includes a sensor 101, an indoor determination unit 102, a determination table 103, a performance control unit 106, a performance control knowledge unit 107, and a fan motor control unit 108. The room determination unit 102, the performance control unit 106, and the fan motor control unit 108 function as a control unit.

  The sensor 101 senses the state (for example, indoor environment) of the space to be purified that is installed. As the sensor 101, at least one of a sensor that detects position information such as ultrasonic waves and a sensor that detects an image such as a camera is used. This sensor 101 senses what is in the space to be cleaned, the floor plan of the space to be cleaned, the doors and windows installed in the space to be cleaned, and so on.

  The indoor determination unit 102 is installed in the purification target space from the data stored in the determination table 103 based on the information obtained by the sensor 101, the position of the object in the purification target space, the floor plan of the purification target space. Determine the position of doors and windows. This determination result is output to the performance control unit 106 as room position information.

  The performance control unit 106 selects a table stored in the performance control knowledge unit 107 from the indoor position information obtained from the room determination unit 102. Then, the performance control unit 106 determines wind condition data for controlling the wind speed based on the table selected from the performance control knowledge unit 107 and outputs the determined wind condition data to the fan motor control unit 108.

  The fan motor control unit 108 performs control to change the rotation speed of the fan motor based on the wind condition data.

Japanese Patent Laying-Open No. 2015-143592

  In such a conventional air purifier, it is configured to detect the opening and closing of a door and a window from a change in position by a sensor such as an ultrasonic wave or an image recognition, so that a change in an indoor state is detected. Due to the influence of the material and arrangement of the window and the like, the indoor state change could not be detected, and there was a problem that contaminants such as dust and smell entering the room from the outside could not be collected quickly and efficiently.

  In addition, the indoor environment is various, and in particular, in order to detect the opening and closing of doors and windows by image processing or the like, a complicated algorithm is required and it is difficult to realize.

  Accordingly, the present invention solves the above-described conventional problems, easily detects changes in the state of the room due to the opening and closing of doors and windows, etc., and quickly and efficiently removes contaminants such as dust and smell that enter the room from the outside. The purpose is to collect.

  In order to achieve this object, the present invention provides a housing, a suction port for taking air into the housing, a blowout port for blowing out air taken into the housing, and the suction port to the blowout port. Air blowing means for guiding air, a filter for filtering air sucked from the suction port, an atmospheric pressure sensor for detecting the atmospheric pressure around the housing, and an atmospheric pressure storage means for continuously storing the atmospheric pressure value detected by the atmospheric pressure sensor And an atmospheric pressure change amount detecting means for detecting an atmospheric pressure change amount per unit time stored in the atmospheric pressure storage means, and an atmospheric pressure change amount detected by the atmospheric pressure change amount detecting means is equal to or greater than a predetermined atmospheric pressure change threshold value. Control means for setting the air pressure mode to the atmospheric pressure mode, which is an operation for operating the output of the air blowing means at a predetermined high output or higher, thereby achieving the intended purpose. .

  According to the present invention, the air purifier is provided with a barometric pressure sensor, so that a change in the state of the room due to the opening and closing of doors and windows can be easily detected from the amount of change in the barometric pressure, and dust and smell entering the room can be detected. Quickly and efficiently collect contaminants before they accumulate.

The partial cross section perspective view of the air cleaner which concerns on Embodiment 1 of this invention. The block diagram of the control system which concerns on Embodiment 1 of this invention The flowchart which shows operation | movement of the air cleaner which concerns on Embodiment 1 of this invention. Partial sectional perspective view of an air cleaner according to Embodiment 2 of the present invention. The flowchart which shows the operation | movement which concerns on Embodiment 2 of this invention. Partial sectional perspective view of an air cleaner according to Embodiment 3 of the present invention. The flowchart which shows the operation | movement which concerns on Embodiment 3 of this invention. Structure diagram of conventional air purifier control system

  The air cleaner according to the present invention includes a housing, a suction port for taking air into the housing, a blowout port for blowing out air taken into the housing, and a blowing means for guiding air from the suction port to the blowout port. A filter for filtering the air sucked from the suction port, a pressure sensor for detecting the pressure around the housing, a pressure storage means for continuously storing a pressure value detected by the pressure sensor, and the pressure storage A pressure change amount detecting means for detecting a pressure change amount per unit time of the pressure stored in the means, and the air blowing means when the pressure change amount detected by the pressure change amount detecting means is equal to or greater than a predetermined pressure change threshold value. Control means for setting the air pressure mode to the atmospheric pressure mode, which is an operation for operating the output at a predetermined high output or higher.

  As a result, detection of indoor state changes due to opening and closing of doors and windows is not affected by the material and arrangement of doors and windows, and it is easily detected from the amount of change in atmospheric pressure without requiring a complicated algorithm. I can. As a result, by detecting a change in the indoor state and operating in the atmospheric pressure mode, it is possible to quickly and efficiently collect contaminants such as dust and odor that enter the room from outside the room. Play.

  In addition, a dust sensor for detecting house dust or the like is provided, and the control means detects a dust detection amount detected by the dust sensor after a predetermined time after starting operation in the atmospheric pressure mode below a predetermined dust detection threshold. In this case, the operation in the atmospheric pressure mode may be canceled.

  Accordingly, when the amount of dust in the room is small, the atmospheric pressure mode is canceled and the high-power operation is suppressed, so that an efficient operation with reduced power consumption can be achieved.

  And an odor sensor for detecting an odor, wherein the control means detects an odor detection amount detected by the odor sensor after a predetermined time from the start of operation in the atmospheric pressure mode being equal to or less than a predetermined odor detection threshold. Alternatively, the operation in the atmospheric pressure mode may be canceled.

  Thereby, when the amount of odors in the room is small, the atmospheric pressure mode is canceled and the high-power operation is suppressed, so that an efficient operation with reduced power consumption is achieved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments are examples embodying the present invention, and do not limit the technical scope of the present invention. In addition, throughout the drawings, the same portions are denoted by the same reference numerals, and the second and subsequent descriptions are omitted.

(Embodiment 1)
As shown in FIG. 1, the air purifier 1 according to the present invention includes a housing 2, a suction port 3, a blower outlet 4, a blower 5, a filter 6, and an atmospheric pressure sensor 7.

  The housing | casing 2 functions as an outline which divides the inside and the exterior of the air cleaner 1, and is mainly comprised by the plastic resin.

  The suction port 3 is an opening that is provided in the lower portion of the front surface of the housing 2 and takes air into the housing 2.

  The blower outlet 4 is provided in the upper part of the housing | casing 2 as an opening which blows off the air taken in in the housing | casing 2. FIG.

  The air blowing means 5 is, for example, a sirocco fan that generates an airflow for guiding air from the suction port 3 to the air outlet 4.

  The filter 6 is made of, for example, a fiber having a certain thickness or a sponge-like material, and air can pass through the inside by providing innumerable holes therein. And the said air is filtered by letting the air suck | inhaled from the suction inlet 3 pass.

  The atmospheric pressure sensor 7 is disposed on the outer surface of the housing 2 and detects the atmospheric pressure around the housing 2.

  In other words, the air cleaner 1 collects contaminants such as dust and smell by the filter 6 by taking air into the housing 2 from the suction port 3 by the blower 5 and blowing it out from the outlet 4 through the filter 6. To do.

  Subsequently, in the control system for controlling the air cleaner 1 with reference to FIG. 2, a configuration particularly related to the atmospheric pressure sensor will be described. FIG. 2 is a configuration diagram of the control system of the air purifier 1.

  As shown in FIG. 2, the air cleaner 1 includes a microcomputer 20.

  The microcomputer 20 includes a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and drivers corresponding to driving units such as the air blowing unit 5 and the pressure sensor 7 in the air cleaner 1. Are connected via an internal bus. For example, the CPU uses a RAM as a work area, executes a program stored in the ROM, and controls the operation of each drive unit by exchanging data and commands with the driver based on the execution result.

  The microcomputer 20 functions as the atmospheric pressure storage unit 11, the atmospheric pressure change amount detection unit 12, and the control unit 13.

  The atmospheric pressure storage unit 11 continuously stores the atmospheric pressure value detected by the atmospheric pressure sensor 7. The continuation here is a predetermined time, for example, every 0.1 second.

  The atmospheric pressure change amount detection means 12 detects the atmospheric pressure change amount per unit time of the atmospheric pressure value stored in the atmospheric pressure storage means 11. Here, the unit time is, for example, every second.

  The control unit 13 is configured to operate the blower unit in the atmospheric pressure mode in which the output of the blower unit 5 is operated at a predetermined high output or higher when the atmospheric pressure change amount detected by the atmospheric pressure change amount detector 12 is greater than or equal to a predetermined atmospheric pressure change threshold value. 5 is operated. Here, for example, “higher than predetermined high output” means, for example, the eighth or higher stage when the blowing capacity of the blowing means 5 is defined in ten stages in order from the smallest. Of course, the air volume varies depending on the capacity of the air blowing means 5, but the object here is to set a high output (for example, an air blowing capacity of 50% or more) within the air blowing capacity of the air blowing means 5.

  Then, operation | movement of the air cleaner 1 which concerns on this invention is demonstrated using the flowchart of FIG. By the way, it has been found that the cause of entry of contaminants such as dust and smell into the room is largely due to the entry and exit of people into the room. In other words, the air purifier 1 assumes that the change in the atmospheric pressure is a person entering and exiting the room, which is a sealed space, by the following operation, and the high output of the air blowing means floats contaminants that would be brought in at this time. Clean while maintaining the condition.

  First, the atmospheric pressure sensor 7 provided in the air cleaner 1 detects the atmospheric pressure value around the housing 2 (step S1-1).

  The atmospheric pressure value detected by the atmospheric pressure sensor 7 is continuously stored by the atmospheric pressure storage means 11 (step S1-2).

  The atmospheric pressure change detection means 12 detects the atmospheric pressure change per unit time by reading the atmospheric pressure values stored in the atmospheric pressure storage means 11 at predetermined time intervals (step S1-3).

  The control unit 13 determines whether or not the atmospheric pressure change amount detected by the atmospheric pressure change amount detection unit 12 is equal to or greater than a predetermined atmospheric pressure change threshold value (step S1-4).

  Here, when it is more than a predetermined atmospheric pressure change threshold value, the control means 13 sets to the atmospheric | air pressure mode which is the driving | operation which operates the output of the ventilation means 5 by more than predetermined high output (step S1-5).

  If the predetermined atmospheric pressure change threshold is not reached, the control means 13 continues the current operation. The current operation referred to here corresponds to, for example, a stopped state or a silent mode operation in which the output of the blowing means 5 is suppressed.

The atmospheric pressure change threshold value is set to a value corresponding to an abrupt atmospheric pressure change amount, for example, 50 Pa, which occurs when there is a state change in the room due to opening / closing of a door or window. Thereby, the indoor state change can be detected from the atmospheric pressure change amount by the atmospheric pressure sensor 7 on the basis of the atmospheric pressure change threshold. Moreover, when contaminants such as dust accumulate on the indoor floor or the like, it becomes difficult to collect them with an air cleaner. For this reason, in the atmospheric pressure mode, the output of the air blowing means 5 is operated with a predetermined high output, for example, air of 100 m ³ / h or more, so that contaminants that enter the room from the outside can be quickly and efficiently captured. Can be collected.

(Embodiment 2)
FIG. 4 is a configuration in which a dust sensor 8 is added to the air cleaner 1 in the configuration of the first embodiment.

  The dust sensor 8 detects the amount of dust such as house dust in the air.

  The air cleaner 1 provided with the dust sensor 8 can be operated according to the degree of air pollution in the room by controlling the output of the blowing means 5 according to the amount of dust in the room.

  The operation of the air cleaner 1 having the atmospheric pressure mode and the dust sensor 8 will be described with reference to the flowchart of FIG.

  When the atmospheric pressure change detected by the atmospheric pressure change detection means 12 is equal to or greater than a predetermined atmospheric pressure change threshold, the control means 13 is set to an atmospheric pressure mode in which the output of the air blowing means 5 is operated at a predetermined high output or higher. (Step S2-1).

  It is determined whether or not the dust detection amount detected by the dust sensor 8 after a predetermined time, for example, 10 minutes after starting the operation in the atmospheric pressure mode, is equal to or smaller than a predetermined dust detection threshold (step S2-2).

  Here, when it is below the predetermined dust detection threshold, the operation in the atmospheric pressure mode is canceled (step S2-3).

  If the predetermined dust detection value is exceeded, the operation in the atmospheric pressure mode is continued and the determination is repeated (NO in step S2-2).

The predetermined dust detection threshold is set to a dust detection amount determined to be dirty in the room, for example, a value corresponding to 35 μg / m ³ . Thus, when the dust detection amount is equal to or less than the dust detection threshold, it can be determined that the amount of dust in the room is small and the air is clean. Therefore, when the indoor air is clean, by canceling the high-power atmospheric pressure mode operation, an efficient operation with reduced power consumption can be achieved.

(Embodiment 3)
FIG. 6 is a configuration in which an odor sensor 9 is added to the air cleaner 1 in the configuration of the first embodiment.

  The odor sensor 9 detects the amount of acetaldehyde or the like in the air, that is, the amount of odor-causing substances.

  The air cleaner 1 provided with the odor sensor 9 can be operated according to the degree of air pollution in the room by controlling the output of the blowing means 5 according to the amount of odor in the room.

  The operation of the air cleaner 1 having the atmospheric pressure mode and the odor sensor 9 will be described with reference to the flowchart of FIG.

  When the atmospheric pressure change detected by the atmospheric pressure change detection means 12 is equal to or greater than a predetermined atmospheric pressure change threshold, the control means 13 is set to an atmospheric pressure mode in which the output of the air blowing means 5 is operated at a predetermined high output or higher. (Step S3-1).

  It is determined whether or not the odor detection amount detected by the odor sensor 9 after a predetermined time, for example, 10 minutes after starting operation in the atmospheric pressure mode, is equal to or less than a predetermined odor detection threshold (step S3-2).

  Here, when it is below the predetermined odor detection value, the operation in the atmospheric pressure mode is canceled (step S3-3).

  Moreover, when it exceeds a predetermined odor detection value, the operation in the atmospheric pressure mode is continued and the determination is repeated (step S3-2 NO).

  The odor detection threshold is set to a value corresponding to 0.15 ppm for the odor detection amount determined to be dirty in the room, for example, an acetaldehyde component. Thereby, when the odor detection amount is equal to or less than the odor detection threshold, it can be determined that the amount of odor in the room is small and the air is clean. Therefore, when the indoor air is clean, by canceling the high-power atmospheric pressure mode operation, an efficient operation with reduced power consumption can be achieved.

  The air purifier according to the present invention can be used in general homes and offices because it easily detects a change in the state of a room and collects pollutants quickly and efficiently. It is useful as an air cleaner.

DESCRIPTION OF SYMBOLS 1 Air cleaner 2 Housing | casing 3 Suction inlet 4 Outlet 5 Blower means 6 Filter 7 Pressure sensor 8 Dust sensor 9 Odor sensor 11 Atmospheric pressure memory means 12 Atmospheric pressure change detection means 13 Control means

Claims (3)

A housing,
A suction port for taking air into the housing;
An air outlet for blowing out the air taken into the housing;
A blowing means for guiding air from the suction port to the blowout port;
A filter for filtering air sucked from the suction port;
An atmospheric pressure sensor for detecting the atmospheric pressure around the housing;
Atmospheric pressure storage means for continuously storing the atmospheric pressure value detected by the atmospheric pressure sensor;
An atmospheric pressure change amount detecting means for detecting an atmospheric pressure change amount per unit time of the atmospheric pressure stored in the atmospheric pressure storage means;
Control means for setting the pressure mode to be an operation for operating the output of the blower means at a predetermined high output or higher when the atmospheric pressure change detected by the atmospheric pressure change detection means is equal to or higher than a predetermined atmospheric pressure change threshold;
Air purifier with. It has a dust sensor that detects dust,
The control means includes
The operation in the atmospheric pressure mode is canceled when a dust detection amount detected by the dust sensor after a predetermined time after starting the operation in the atmospheric pressure mode is equal to or less than a predetermined dust detection threshold. Air purifier. It has an odor sensor that detects odors,
The control means includes
The operation in the atmospheric pressure mode is canceled when the detected amount of odor detected by the odor sensor after a predetermined time after the operation in the atmospheric pressure mode is less than or equal to a predetermined odor detection threshold. 2. The air cleaner according to 2.

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