JP6739006B2 - Blower - Google Patents

Description

The present invention relates to a blower device that controls environmental elements in a work space.

Generally, when performing work in a work space such as a learning space or an office space, work efficiency is affected by the degree of concentration of user's consciousness (hereinafter referred to as “concentration degree”). Then, the degree of concentration of users changes depending on various environmental factors. Therefore, a technique for controlling an environmental element that affects the degree of concentration of users has been proposed. The environmental elements mentioned here include lighting environment (illuminance/visual stimulus), auditory environment (sound), olfactory environment (smell), air environment (airflow, temperature and humidity, ventilation).

For example, Patent Document 1 proposes a doze prevention device that prevents drowsiness by controlling the airflow of the air environment.

The drowsiness prevention device disclosed in Patent Document 1 can prevent drowsiness by turning on and off the air blower in response to the pulse signal and intermittently applying the airflow to the user.

JP, 2007-106337, A

However, in this drowsiness prevention device, if the wind speed is to be rapidly increased, it is necessary to instantly activate the blower unit, and suddenly loud fan noise is generated. In other words, the user may be surprised by receiving a large auditory stimulus before the airflow hits, which may impede concentration.

It is also conceivable that sudden blowout of air from the blow-out port causes rapid pressure fluctuations near the blow-out port, resulting in burst noise. This may also cause the user to be disturbed by receiving a large auditory stimulus.

An air blower according to the present invention includes a suction port that sucks in air, a blowout port that blows out the air that has been sucked in from the suction port into a work space, and a fan that generates an airflow from the suction port toward the blowout port. Further, it is provided with a motor that drives the fan, an airflow direction changing device that changes the airflow direction of the air blown out from the air outlet, and a control unit that controls the operation of the motor and the airflow direction changing device. Then, the control unit executes the concentrated airflow mode. In the concentrated airflow mode, the first step of directing the wind direction of the airflow blown from the air outlet to the unmanned area in the work space by the airflow direction changing device, and after the first step, the rotation of the motor is accelerated to increase the wind speed above a predetermined threshold And a second step of blowing out a concentrated airflow having In addition, after the second step, a third step of changing the wind direction of the concentrated airflow to a manned area in the work space by the wind direction changing device, and a state in which the wind direction of the concentrated airflow is directed to the manned area after the third step is maintained. And a fourth step. Further, after the fourth step, there is a fifth step of decelerating the rotation of the motor to reduce the wind speed of the airflow.

With such a configuration, the present invention can maintain or improve the degree of concentration of the user by controlling the air flow.

FIG. 1 is a schematic diagram showing a blower device according to a first embodiment of the present invention, which is arranged in a work space. FIG. 2 is a schematic sectional view of the air blower according to the first embodiment of the present invention. FIG. 3 is a block diagram of the air blower according to the first embodiment of the present invention. FIG. 4 is a block diagram of a control unit of the blower according to the first embodiment of the present invention. FIG. 5 is a flow chart in which schematic diagrams are combined, showing operation steps in the concentrated airflow mode of the blower according to the first embodiment of the present invention. FIG. 6 is a diagram showing a specific example in which the airflow of the air blower according to the first embodiment of the present invention is blown to an unmanned area and a manned area. FIG. 7 is a time-series graph of the wind speed of the concentrated airflow of the air blower according to the first embodiment of the present invention. FIG. 8: is a figure which shows the measurement example for quantifying the concentration degree when using the air blower in the 1st Embodiment of this invention. FIG. 9 is a diagram showing a relationship between progress of work time and concentration when the air blower according to the first embodiment of the present invention is used. FIG. 10: is a flowchart which combined the schematic diagram which shows the operation step of the 1st operation pattern of the air blower in the 1st Embodiment of this invention. FIG. 11: is a flowchart which combined the schematic diagram which shows the operation step of the 2nd operation pattern of the air blower in the 1st Embodiment of this invention. FIG. 12: is a figure which shows an example of the control table of the air blower in the 1st Embodiment of this invention. FIG. 13 is a block diagram of an air blower according to the second embodiment of the present invention. FIG. 14: is a flowchart which shows the operation step of the centralized mode of the air blower in the 2nd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. The following embodiments are examples of embodying the present invention and do not limit the technical scope of the present invention. In addition, the same components are denoted by the same reference symbols throughout the drawings, and description thereof will be omitted. Further, in each of the drawings, the description of the details of each part not directly related to the present invention is omitted.

(First embodiment)
In this embodiment, in order to maintain or improve the degree of concentration of the user in the work space, a configuration is employed in which an air blower is used to control the air flow in the work space. Note that FIG. 1 is a schematic view showing the air blower arranged in the work space.

In the present embodiment, as shown in FIG. 1, assuming that the working space Es in which the user Us exists is indoors, an example in which the air blower 1 is installed on the floor is shown. The work space Es here means a space in which the user works. Therefore, a shield such as a wall or a window that separates the inside and the outside of the space is not always necessary.

The configuration of the blower device 1 will be described below with reference to FIGS. 1, 2, 3, and 4. Note that FIG. 2 is a schematic cross-sectional view showing the configuration of the blower. FIG. 3 is a block diagram showing the configuration of the blower.

As shown in FIG. 1, the outer contour of the blower device 1 has a substantially cubic shape and includes a front surface, a side surface, and a rear surface that are substantially perpendicular to the floor surface. Further, it has a bottom surface in contact with the floor surface and a top surface at a position facing the bottom surface. The external dimensions of the blower 1 illustrated here are 0.4 m in width, 0.3 m in depth, and 0.7 m in height.

The blower device 1 has a bottom structure 2 that can be stably installed on the floor. The bottom structure 2 may have a plurality of legs that surround the center of gravity of the blower 1, and the legs may be in contact with the floor surface in the work space Es.

A suction port 3 for sucking air into the blower device 1 is provided on the front surface.

The top surface is provided with a blow-out port 4 that blows out the air sucked from the suction port 3 into the working space Es. Naturally, the height of the blowout port 4 from the bottom surface varies depending on the size of the blower 1, but in the present embodiment, it is arranged at a height of 0.6 to 0.7 m above the bottom surface.

Further, as shown in FIG. 2, a plate-shaped louver 5 is provided near the air outlet 4. The louver 5 functions as a wind direction changing device that changes the wind direction of the air flow blown out from the air outlet 4.

The louver 5 is provided with a rotary shaft 6 which is horizontal to the bottom surface and parallel to the front surface at one end on the rear surface side of the outlet 4. Further, the blower device 1 includes a stepping motor 7 that rotates the louver 5 around the rotation shaft 6.

The stepping motor 7 is configured to adjust the inclination angle of the louver 5 and control the wind direction in a direction along the inclination angle of the louver 5. The wind direction angle of the airflow that can be blown by the louver 5 is in the range of -20° to 90°, where 0° is the front direction and the direction horizontal to the bottom surface, and 90° is the vertical upward direction.

Inside the blower device 1, a fan 8 that generates an air flow from the suction port 3 toward the blowout port 4 and a motor 9 that rotationally drives the fan 8 are provided. A sirocco fan can be used as an example of the fan 8. A DC motor can be used as an example of the motor 9.

Then, the suction port 3, the fan 8, the motor 9, the air outlet 4, the louver 5, and the stepping motor 7 constitute the blower unit 10 shown in FIG.

The blower device 1 further includes a control unit 11 that controls the inclination angle of the louver 5, that is, the operation, via the rotation of the motor 9 and the stepping motor 7.

As shown in FIG. 3, the control unit 11 includes a storage unit 12, a processing unit 13, a timer unit 14, an instruction unit 15, an input unit 23, and an acquisition unit 18.

The storage unit 12 stores a program for controlling the blower unit 10 and a control table 19 described later.

The processing unit 13 controls the operation content of the blower unit 10 using the information stored in the storage unit 12. Further, the information necessary for control is acquired from the control table 19 also stored in the storage unit 12 to determine the operation of each unit.

Based on the operation determined by the processing unit 13, the instruction unit 15 sends a signal to the blower unit 10, specifically, the stepping motor 7 that operates the louver 5 that constitutes the wind direction changing device, and the motor 9 that operates the fan 8. .. As a result, each unit of the blower unit 10 executes the operation determined by the processing unit 13.

The timer unit 14 measures the time for determining the timing for operating the blower unit 10.

The input unit 23 delivers information from the operation pattern selection switch 20, the wind speed adjustment switch 21, and the cycle adjustment switch 22 provided in the blower device 1 to the processing unit 13.

The acquisition unit 18 receives information from the temperature sensor 17 as an air temperature detection unit provided in the blower 1 and transfers it to the processing unit 13.

The operation pattern selection unit 16 selects which of the plurality of operation patterns included in the blower 1 is to be executed, which will be described in detail later.

As shown in FIG. 4, the control unit 11 described above is implemented by using a computer such as a microcomputer or a microprocessor that operates according to a program as an example. That is, the control unit 11 has a memory 41 represented by a CPU (Central Processing Unit) 40, a RAM (Random Access Memory), a ROM (Read Only Memory), a HDD (Hard Disk Drive), and the like. Further, the control unit 11 has an I/F (Interface) 42 that can be physically connected to various devices, and the memory 41 and the I/F 42 are connected via an internal bus 43.

The CPU 40 uses, for example, a RAM as a work area, and executes a program stored in a memory 41 such as a ROM or an HDD to execute a program, and the processing unit 13, the clock unit 14, the operation pattern selection unit shown in the control unit 11 in FIG. It operates as the unit 16 and the like.

The memory 41 corresponds to the storage unit 12 shown in FIG. 2, and functions as a storage location of a program, a work area when the program is executed, and a storage location of a data table referred to when the program is executed.

The I/F 42 corresponds to the instruction unit 15, the acquisition unit 18, the input unit 23, and the like illustrated in FIG. 3, serves as a physical connection unit between the control unit 11 and each device, and connects each device and the control unit 11. Mediates the transfer of signals. Here, each device includes the motor 9, the stepping motor 7, the temperature sensor 17, the operation pattern selection switch 20, the wind speed adjustment switch 21, the cycle adjustment switch 22 and the like shown in FIG. 2 or FIG.

As described above, the blower device 1 includes the blower unit 10 and the control unit 11. The blower unit 10 has a function of forming an airflow in the work space, and the control unit 11 maintains or improves the degree of concentration of the user Us existing in the work space Es. 10 operations are controlled.

The basic operation of the blower device 1 will be described below with reference to FIG.

The processing unit 13 included in the control unit 11 receives the air temperature information from the temperature sensor 17 via the acquisition unit 18. Subsequently, the processing unit 13 refers to the control table 19 stored in the storage unit 12, determines the operation of each unit corresponding to the acquired air temperature, and operates the motor 9 and the stepping motor 7 via the instruction unit 15. Send as an instruction.

The motor 9 rotates the fan 8 by rotating at a predetermined rotation speed based on the operation command received from the instruction unit 15. The fan 8 generates an air flow by this rotation. Air is taken in from the suction port 3 by the air flow, and is blown out as an air flow from the air outlet 4 via the fan 8. Further, the stepping motor 7 positions the louver 5 at a predetermined angle based on the operation command received from the instruction unit 15. The louver 5 determines the wind direction (angle) of the airflow blown from the air outlet 4.

When increasing the wind speed of the airflow, the processing unit 13 increases the rotation speed of the fan 8 by issuing an instruction to increase the rotation speed of the motor 9. When the rotation speed of the fan 8 increases, the air flow increases, and the wind speed of the air flow blown out from the air outlet 4 can be increased. When lowering the wind speed of the air flow, control is performed to reduce the rotation speed.

On the other hand, when changing the wind direction of the airflow, the processing unit 13 changes the angle of the louver 5 by issuing an instruction to change the angle to the stepping motor 7. Since the airflow blown out from the blowout port 4 flows along the louver 5, if the angle of the louver 5 is changed, the wind direction can be changed in a direction according to the angle of the louver 5.

The above is the basic operation of the blower 1.

Next, the operation of the blower device 1 for maintaining or improving the concentration of the user will be described in detail with reference to FIG. Note that FIG. 5 is a flowchart combined with schematic diagrams showing the operation steps of the blower device 1 in the concentrated airflow mode.

As shown in FIG. 5, as a first step, the control unit 11 controls the louver 5 so that the wind direction of the air flow blown out from the air outlet 4 is directed toward the unmanned area (step S01). The unmanned area defined here refers to an area where the air flow does not directly hit the user Us who is working. In the present embodiment, as an example, the controller 11 directs the angle of the louver 5 in the vertically upward direction to blow out the airflow upward.

After the first step (step S01), as a second step, the control unit 11 accelerates the rotation speed of the fan 8 in a state where the louver 5 is directed toward the unmanned area to increase the maximum value V1 of the wind speed equal to or higher than a predetermined threshold value. The concentrated airflow F1 having the above is blown out from the air outlet 4 (step S02).

Here, the numerical value of the wind speed of the present invention is not the wind speed blown out from the outlet of the air outlet 4 (outlet wind speed), but the wind speed measured at a position distant to the reference distance. The reference distance may be the distance from the blower 1 to the user Us, but it does not matter whether the airflow generated from the outlet 4 directly hits the user Us or does not hit it. That is, it refers to a constant distance from the blower 1. In this definition, the above-mentioned predetermined threshold value is, for example, 0.5 (m/s) or more.

In the present embodiment, the reference distance is set to 2 m, and when the reaching wind speed is 0.5 (m/s), the blowing is performed at 1.0 (m/s) in consideration of the distance attenuation.

Distance attenuation is V0 (m/s) at the outlet wind velocity, Vx (m/s) at the position at a distance x (m) away from the outlet in the flow direction of the airflow, and D0 (at the outlet diameter). m), and K is a constant, it can be calculated by the following formula.

Vx=K*D0*V0/X... Formula 1
Here, it is known from the literature that the constant K is K≈5.2 for the free jet flow at the time of isothermal blowing.

Further, the outlet diameter D0 is set to 0.2 (m).

The exit wind speed V0 that obtains the reaching wind speed Vz=2.0 (m/s) at the position of the distance z=2.0 (m) from Formula 1 is V0≈0.96≈1.0 (m/s).

In addition, when the rotation speed of the fan is increased to increase the wind speed, the wind speed is slowly increased in a time period of 2 to 3 seconds, and the auditory stimulation caused by the sudden increase in noise is suppressed.

After the second step (step S02), as the third step, the control unit 11 controls the louver 5 so that the wind direction of the concentrated airflow F1 blown out from the outlet 4 is directed to the manned area (step S03). The manned area defined here refers to an area where the air flow directly hits the user Us who is working. In the present embodiment, as an example, assuming that the front of the blower device 1 faces the user Us, the airflow is blown by tilting the angle of the louver 5 to the front side and directing it in the horizontal direction (angle 0°). Blow out horizontally on the front side of the device 1. Thereby, the concentrated airflow F1 can be directly applied to the user Us.

After the third step (step S03), as a fourth step, the control unit 11 maintains a state in which the concentrated airflow F1 is continuously blown to the manned area (step S04). In this embodiment, at this time, the control unit 11 keeps the concentrated airflow F1 on the user Us for 30 seconds, and the time counting unit 14 measures the time.

After the fourth step (step S04), as the fifth step, the control unit 11 decelerates the rotation of the motor 9 to reduce the wind speed (step S05). The criterion for reducing the wind speed is the immediately preceding wind speed, that is, the maximum value V1 of the wind speed, which means that the wind speed is decelerated from the maximum value V1 of the wind speed.

The above first to fifth steps are called a concentrated airflow mode.

Next, the definition of the manned area and the unmanned area will be described in more detail with reference to FIG. FIG. 6 is a diagram showing a specific example in which the air flow is blown to the unmanned area and the manned area of the blower 1.

As an example of applying the concentrated airflow F1 (see FIG. 5) to the manned area, the distance between the air blower 1 and the user Us is 2 m, the front of the air blower 1 is installed so as to face the user Us, and It is assumed that the user Us sits in a chair and works. In this case, it can be assumed that the foot of the user Us is 0 m from the floor and the head is about 1.2 m from the floor. Since the height of the air outlet 4 of the air blower 1 is 0.6 to 0.7 m from the floor surface, when the concentrated airflow F1 is blown to the feet of the user Us, the angle of the louver 5 is set to -10° to -20. Set to °. When the concentrated air flow F1 is blown to the head of the user Us, the angle of the louver 5 may be set to 10 to 20°. Then, the angle of the louver 5 is set vertically above 20° and the region of 30° to 90° where the airflow does not directly hit the user Us becomes an unmanned region. As a matter of course, the range of 90° or more can also be the unmanned area.

As described above, the blower device 1 is provided with the bottom structure 2, and the height of the air outlet 4 is provided at a height of 0.5 to 2 m from the floor surface, and at least from the front horizontal direction to the vertically upward direction by the louver 5. The wind direction is controllable and installed so that the front of the blower device 1 faces the user Us. With such a configuration, the blower device 1 can determine the manned area or the unmanned area and blow the concentrated airflow F1 without using a human sensor for detecting the position of the user Us. This eliminates the need for a human sensor and a mechanism for controlling the wind direction toward the left and right sides of the blower 1, which is advantageous in that the blower 1 can be downsized.

Further, since the magnitude of the attenuation of the wind speed of the air flow changes depending on the distance between the blower 1 and the user Us, a wind speed adjustment switch that can adjust the wind speed of the air flow blown out from the air outlet 4 may be provided. The specific configuration of the wind speed adjustment switch 21 will be described later.

The air blower 1 may be provided with a distance measuring sensor capable of measuring the distance to the human body, and the wind speed of the airflow blown out from the air outlet 4 may be adjusted depending on the distance between the user Us and the air blower 1.

The feature is that in the first step, the user Us is controlled so that the air is not blown to the unmanned area in advance, and then the wind speed is increased without hitting the user Us to generate the concentrated airflow F1. Then, the concentrated air flow F1 is directly applied to the manned area, that is, the user Us by the louver 5, so that the user Us feels like a sudden strong wind is blowing.

FIG. 7 shows a graph in which the wind speed of the airflow applied to the user Us is measured in time series in the present embodiment. In the lower part of the graph, the control timings of steps S01 to S05 in FIG. 5 are shown in synchronization with the wind speed.

As shown in FIG. 7, the wind speed of the airflow applied to the user Us rises rapidly toward the manned area after the occurrence of the concentrated airflow F1 (after reaching the wind speed of the concentrated airflow F1). In this way, the user Us feels a change in the air environment due to the wind by increasing the gradient in which the wind speed increases. At the end of the concentrated airflow F1, the angle (direction) of the louver 5 is not changed to the unmanned region while the concentrated airflow F1 is maintained, but the rotation of the motor 9 is first decelerated to reduce the wind speed. As a result, the wind hitting the user Us is moderated to give a natural impression.

How to feel the wind depends on the air temperature of the work space Es, the magnitude of the maximum value V1 of the wind speed of the concentrated airflow F1, the time of applying the wind to the user Us, which part of the body of the user Us the wind hits, and the use It depends on the amount of clothing of the person Us. However, it is possible to continue the work in a concentrated manner by receiving the feeling of wind pressure and coolness due to the concentrated airflow F1, the impression that the air is circulating, and the like. That is, there is an effect that the degree of concentration can be improved.

Further, even in an environment such as winter when the air temperature in the work space Es is low and the user Us may be exposed to the airflow to feel cold, the operation steps of the concentrated airflow mode of the present embodiment are used. For example, there is also an advantage that the user Us is not made uncomfortable such as cold even if the time for which the concentrated air flow F1 is applied is shortened.

<Concentration>
By the way, although the term “concentration degree” is used in the present embodiment, the term “concentration degree” is rarely clearly defined. In the case where the degree of concentration is quantified and treated, for example, the concentration time ratio described below can be used as an index. The concentrated time ratio means the ratio of the time in which the worker was in a concentrated state to the working time when he or she performed an intellectual work.

The concept of the concentrated time ratio is based on a model that includes a state in which cognitive resources are assigned to work targets and a state in which cognitive resources are not assigned to work targets during a period in which a person is performing intellectual work. ing. In this model, a state in which cognitive resources are assigned to a target and work is in progress is referred to as a "working state", and a state in which cognitive resources are not assigned to a target and rests for a long period of time is referred to as "long-term rest". Further, a state in which cognitive resources are allocated to a target but work processing is unconsciously stopped for a short time is called “short-term rest”. It is known that the “short-term rest” state physiologically occurs with a certain probability during the “working state”.

The “working state” and the “short-term rest” are states in which the cognitive resources are allocated to the target, and are therefore considered to be the concentration state, and the “long-term rest” is a state in which the cognitive resources are not allocated to the target. , Considered to be defocused. Therefore, if the three states of "working state", "short-term rest", and "long-term rest" or the two states of "working state" and "short-term rest" and "long-term rest" are separated, the degree of concentration is quantified. It turns out that it can be converted.

Here, not a technique of measuring the degree of concentration in real time, but a technique of obtaining a period during which the state of concentration is in the predetermined period will be described. In this case, for example, a large number of questions with less variation in difficulty are presented to the subject whose concentration is to be measured, and the time required for the subject to answer the question (answer time) is measured for all questions.

Next, as shown in FIG. 8, the frequency is obtained for each segment of the response time and a histogram is generated. When the above-mentioned model is adopted, this histogram is estimated to represent the result of superimposing the concentrated state and the defocused state.

Experimental results have shown that this histogram has a shape with two or more peaks when given an appropriate problem. That is, two or more chevron areas are generated in the histogram. The Yamagata region containing the peak with the shortest response time represents a mixture of the "working state" and the "short-term rest", and the Yamagata region containing other peaks represents the "working state", the "short-term rest", and the "working state". Interpreted as a mixture of "long rest". This is because even in a concentrated state, the response time may be long depending on the difficulty level of the problem.

Here, assuming an ideal state in which the difficulty of the problem is constant, it is estimated that the mountain-shaped region appearing in the histogram can be approximated by the probability density function f(t) of the lognormal distribution as a function of the response time t. It However, in reality, it is not possible to completely eliminate the variation in the difficulty level of the problem. Therefore, regarding the mountain-shaped region having the shortest response time among the two mountain-shaped regions, only the region having a shorter response time than the peak and the region near the peak are interpreted as matching the probability density function f(x) of the log-normal distribution. Then, the parameters (expected value and variance) of the probability density function f(x) are determined so as to approximate this part.

When the parameters of the probability density function f(x) are determined, it becomes possible to obtain the expected value of the response time. The result of multiplying the calculated expected value by the total number of questions can be interpreted as the time spent in a concentrated state out of the total time (total answer time) from when the subject started the problem to when it ended. is there. Further, the time obtained by subtracting the time spent in the concentrated state from the total response time can be interpreted as the time spent in the non-concentrated state. Therefore, the time ratio of the time in the concentrated state to the total response time is defined as the concentrated time ratio, and the larger the concentrated time ratio, the higher the degree of concentration.

The above-mentioned concentration time ratio is an example of the index of the degree of concentration, and the degree of concentration can be quantified using another index described later. In particular, in order to obtain the concentration time ratio, it is necessary to give the subject a large number of questions to be answered, and it is difficult to obtain an index of the degree of concentration during the work. Therefore, in order to control the blower unit 10 according to the degree of concentration, it is necessary to measure an index of the degree of concentration equivalent to the concentration time ratio by another technique.

By the way, when the subject is continuously given a problem for a relatively long time (for example, 3 hours), unless the work environment is changed, the concentration degree for each relatively short period (for example, 1 to 10 minutes) is It has been found that the characteristic changes like the characteristic C1 shown in FIG.

That is, when the intellectual work continues for a relatively long period of time, the degree of concentration fluctuates so as to repeatedly increase and decrease every 20 to 40 minutes, as indicated by the characteristic C1. In short, when intellectual work is continuously performed, the concentration level has a characteristic of repeating increase and decrease such that the concentration level decreases from a high state over time, then recovers, increases, and decreases again. doing. There are individual differences in the period during which the degree of concentration changes, and also changes due to various factors. Focusing on the change in the degree of concentration with the passage of time as described above, it can be said that in order to improve the work efficiency of the intellectual work, it is sufficient to suppress the decrease in the degree of concentration.

In the concentrated airflow mode, the concentrated airflow F1 is repeatedly applied to the user Us in accordance with the change in the concentration, so that the user Us can be controlled to maintain a high concentration.

As a specific example, after the fifth step (step S05) in the concentrated airflow mode, the time counting unit 14 measures the time, and 10 minutes later, the first step is started again. By performing the loop processing of the series of control steps, the blower device 1 can apply the concentrated airflow F1 to the user Us about every 10 minutes, and the concentration degree of the user Us can be improved.

Further, in order to further improve the degree of concentration, it is possible to combine an airflow mode different from the concentrated airflow mode.

In the present embodiment, the airflow mode combined with the concentrated airflow mode is the minute airflow mode or the environmental airflow mode.

The combination of the concentrated airflow mode and the slight airflow mode, and the combination of the concentrated airflow mode and the environmental airflow mode will be described below in detail.

<Micro air flow mode>
First, in the minute airflow mode, as shown in FIG. 10, after the fifth step (step S05) of the concentrated airflow mode, the wind speed is half or less of the maximum value V1 of the wind speed of the concentrated airflow F1 as the 6a step. In this mode, the minute airflow F2 is blown toward the manned area, that is, the user Us (step S06a). The maximum value V2 of the wind speed of the slight air flow F2 is V2<=0.5×V1 with respect to the maximum value V1 of the wind speed of the concentrated air flow F1.

When the maximum value V1 of the wind speed of the concentrated airflow F1 is 0.5 m/s, the maximum value V2 of the wind speed of the minute airflow F2 is 0.25 m/s or less.

The slight airflow mode is an airflow control mode in which air is blown when the concentrated airflow F1 is not generated, and the wind speed of the airflow that directly strikes the user Us is reduced by the fifth step (step S05) of the concentrated airflow mode. Let the wind velocity be a minute air flow F2. That is, the airflow having a weak wind speed is sent to the user Us by the step 6a (step S06a).

Generally, in the air environment near the human body, an ascending air current is generated around the head due to the heat generation of the human body, and the temperature boundary layer tends to be thicker in the upper body to the periphery of the head than in the lower body. In other words, the effect of the concentrated airflow F1 may be weakened by the rising airflow from the upper body to the vicinity of the head. In particular, the concentrated airflow F1 is only applied intermittently to the user Us, so the stimulus may be weakened by the ascending airflow.

Therefore, while the concentrated air flow F1 is not being applied to the user Us, by applying the minute air flow F2 from the upper half of the body to the vicinity of the head, the temperature boundary layer is thinned and the heat radiation from the human body is promoted.

As a result, the effect of stimulation by the concentrated airflow F1 is enhanced, the effect of improving the degree of concentration is strengthened, and the degree of concentration can be improved. Further, by further sending the minute airflow F2 toward the head of the user Us, heat dissipation is promoted, a so-called head cold foot thermal environment is obtained, a comfortable work environment can be provided, and concentration can be improved. it can.

The slight air flow F2 may be fluctuated in the wind speed and is continuously generated although it includes a period in which the wind speed is 0 [m/s]. The maximum value V2 of the wind speed of the minute airflow F2 may be constant, but by providing fluctuation, the possibility that the user Us will be cooled by the minute airflow F2 is reduced. As the fluctuation, for example, 1/f fluctuation is adopted. In order to give fluctuations to the wind speed, in addition to controlling the rotation speed of the fan 8 provided in the blower unit 10, the direction of the airflow may be changed by the louver 5.

An experiment in which an active university student is used as a subject to measure the degree of concentration in an environment that employs a technique that uses the concentrated airflow F1 and the minute airflow F2 as in the present embodiment and an environment that does not use the concentrated airflow F1 and the minute airflow F2 As a result, it was found that the technique of the present embodiment significantly improves the degree of concentration by 15.9%. Further, as shown by the characteristic C2 in FIG. 9, it was confirmed that the decrease in concentration was suppressed.

From this, when the concentrated airflow F1 and the minute airflow F2 are used in combination, the reduction of the concentration degree is suppressed, and as a result, the improvement of work efficiency can be expected.

<Environmental air flow mode>
Next, the environmental airflow mode will be described.

As shown in FIG. 11, the environmental airflow mode is an airflow control mode in which air is blown when the concentrated airflow F1 is not generated, as in the case of the minute airflow mode, and the user Us according to the fifth step (step S05) of the concentrated airflow mode Reduces the wind speed of the airflow that hits directly. Then, as a 6b step, the control part 11 controls the louver 5 so that the wind direction of the air flow blown out from the blower outlet 4 may go to an unmanned area (step S06b). As an example of controlling the wind direction in the unmanned region, the angle of the louver 5 is controlled to 45° so that the airflow flows above the user Us.

After step 6b (step S06b), as step 7b, the control unit 11 controls the rotation of the motor 9 so as to blow out the environmental airflow F3 having a lower wind speed than the concentrated airflow F1 (step S07b). The maximum value V3 of the wind speed of the environmental airflow F3 has a relationship of V3<V1 with respect to the maximum value V1 of the wind speed of the concentrated airflow F1. As an example of the wind speed of the environmental airflow F3, when the maximum value V1 of the wind speed of the concentrated airflow F1 is 0.5 m/s, the maximum value V3 of the wind speed of the environmental airflow F3 is 0.3 m/s.

At this time, since the maximum value V3 of the wind speed of the environmental airflow F3 is the wind speed above the user Us, it is not the wind speed actually felt by the user Us.

The purpose of the environmental air flow F3 is to stir the air in the work space Es to reduce the stagnation of the air around the user Us and to eliminate the air temperature unevenness in the work space Es.

As a result, a comfortable working environment can be formed and the concentration can be improved.

The period in which the environmental airflow F3 is formed is the same as the minute airflow F2 (see step S06a in FIG. 10). However, the wind direction of the minute airflow F2 is controlled so as to hit the user Us, while the wind direction of the environmental airflow F3 is controlled so as not to hit the user Us. That is, the minute airflow F2 hits the user Us, whereas the environmental airflow F3 does not hit the user Us.

It is desirable that the environmental airflow F3 is sent when the air temperature in the work space Es is relatively low.

There are two reasons. One reason is that when the air flow is directly applied to the user Us, the sensible temperature of the user Us is lowered, and the user Us may easily feel cold or cold, and the concentration may be reduced. At this time, by forming the environmental airflow F3, it is possible to eliminate the stagnation of the air without feeling cold or cold, and to provide a comfortable working environment in which the air circulates.

Another reason is that cold air stays in the vicinity of the floor surface and warm air stays in the vicinity of the ceiling, resulting in temperature unevenness, which easily deteriorates the comfort of the air environment. At this time, by forming the environmental airflow F3, it is possible to eliminate the temperature unevenness and provide a comfortable working environment close to the cold head heat of the feet where the feet are not too cold. Further, in order to eliminate temperature unevenness, it is desirable that the environmental airflow F3 blows the airflow toward the upper ceiling surface, so that the circulation effect of indoor air can be enhanced.

As described above, there is an effect that the concentration degree of the user Us is further enhanced by combining the concentrated airflow mode and the minute airflow mode or the environmental airflow mode. The combination of the concentrated airflow mode and the minute airflow mode is the first operation pattern, the concentrated airflow mode. The combination of and the environmental airflow mode is defined as the second operation pattern.

Here, as shown in FIG. 3, the control unit 11 selects an operation pattern based on the temperature information from the temperature sensor 17 to operate the blower unit 10 according to the first operation pattern or the second operation pattern. The selection unit 16 is provided. For example, the operation pattern selection unit 16 selects the first operation pattern and notifies the processing unit 13 when the input signal from the temperature sensor 17 is 24° C. or higher. When the input signal is lower than 24° C., the second operation pattern is selected and the processing unit 13 is notified. As a result, the processing unit 13 can determine the operation pattern.

The first operation pattern and the second operation pattern are repeatedly controlled by the control unit 11 so that the operation steps loop. As a result, the concentrated airflow F1 is repeatedly generated regardless of which of the first operation pattern and the second operation pattern is being operated, and the concentrated airflow F1 is repeatedly hit even when the user Us is working for a long time. The degree of concentration of the user Us can be increased. Further, it is possible to set the cycle Ts in which the time counting unit 14 repeats the operation so as to match the fluctuation of the concentration degree of the user Us.

It is desirable that a specific range of the cycle Ts can be selected from a range of 5 minutes or more and 40 minutes or less. The reason why it is set to 5 minutes or more is that, if the concentrated airflow F1 is applied to the user Us in a cycle of approximately 5 minutes or less, the user Us often receives the impression of being hit by the airflow. As a result, it has been confirmed by experiments that the airflow becomes a factor that hinders concentration and it becomes difficult to obtain the effect of improving the degree of concentration. Further, the reason for setting it to 40 minutes or less is that it can be adjusted to the fluctuation (20 to 40 minutes) of the degree of concentration that occurs when the intellectual work is performed for a long time.

Further, it is desirable that the maximum value V1 of the wind speed of the concentrated airflow F1 in the concentrated airflow mode is selected from the range of 0.5 [m/s] or more and 2 [m/s] or less. Further, it is desirable that the time (holding time Tf) during which the concentrated air flow F1 is continuously blown to the manned area in the fourth step is selected from the range of 3 seconds to 60 seconds.

The reason for setting the lower limit of the maximum value V1 of the wind velocity V1 of the concentrated airflow F1 to 0.5 m/s is that the wind velocity that can be recognized by the user Us and is perceived as a stimulus is required at the minimum. Generally, the lower limit of the wind speed that can be felt by a person is about 0.2 m/s, but a wind of 0.2 m/s can be detected if the skin is exposed, but from the top of clothes. I can't detect it. Therefore, the wind speed is set to 0.5 m/s or more so that the wind can be recognized to some extent even from above the clothes.

Moreover, the reason why the upper limit is set to 2 m/s is that if an air flow having a wind speed of 2 m/s or more is blown, the stimulus to the user Us becomes too strong, which may hinder concentration. Further, when the work is a work using paper, the paper may be scattered due to the wind direction of the air flow.

Therefore, the maximum value V1 of the wind speed of the concentrated airflow F1 is set to the range of 0.5 to 2 m/s.

Next, the reason for setting the lower limit of the holding time Tf of the concentrated airflow F1 to 3 seconds is that it is the minimum time required for the user Us to notice that he is hitting the concentrated airflow F1. By using the operation steps of the concentrated airflow mode of the present embodiment, the user Us can apply the concentrated airflow F1 whose wind speed has been increased in advance to the user Us at once with the louver 5. However, it is difficult to obtain sufficient stimulation in 1 to 2 seconds, so that at least 3 seconds is required. Further, the reason why the upper limit is set to 60 seconds is that the user Us may become accustomed to the stimulus if the air flow is applied for a long time.

Therefore, by selecting the condition relating to the concentrated air flow F1 within the above range, it is possible to give an appropriate stimulus to the user Us, and there is an effect of improving the degree of concentration of the user Us.

Further, in addition to the period Ts in which the concentrated air flow F1 is generated, the maximum value V1 of the wind speed, and the holding time Tf, the maximum value V2 of the wind speed of the slight air flow F2 and the maximum value V3 of the wind speed of the environmental air flow F3 are set values depending on the air temperature. It is desirable to be able to select a comfortable airflow that matches the thermal sensation of the user Us by changing.

Therefore, in this embodiment, as shown in FIG. 2, a temperature sensor 17 (as an example, a thermistor) as an air temperature detecting device for detecting the air temperature is provided near the suction port 3 of the blower 1.

The storage unit 12 also includes a control table 19 shown in FIG. The control table 19 includes the air temperature, the maximum value V1 of the wind speed of the concentrated airflow F1, the holding time Tf of the concentrated airflow F1, the maximum value V2 of the wind speed of the minute airflow F2, the maximum value V3 of the wind speed of the environmental airflow F3, the control step The operation pattern (first pattern, second pattern) indicating the combination and the cycle Ts for repeating the operation pattern are made to correspond to each other.

As an example of the control table 19, it is defined that the first operation pattern is selected when the air temperature is 24° C. or higher and the second operation pattern is selected when the air temperature is lower than 24° C. As described above, the first operation pattern is an operation pattern used by combining the concentrated airflow F1 and the minute airflow F2, and the second operation pattern is an operation pattern used by combining the concentrated airflow F1 and the environmental airflow F3. ..

That is, when the user Us feels cold due to the reduction in the sensible temperature due to the slight airflow F2, the environmental airflow F3 is generated instead of the slight airflow F2, and conversely, when the user Us feels hot in the environmental airflow F3. By generating the minute air flow F2, the sensible temperature is lowered. Furthermore, as shown in FIG. 12, the temperature range is divided every 2° C. and the wind speed is determined. When the air temperature rises above 24° C., the maximum value V1 of the wind speed of the concentrated airflow F1 and the maximum value V2 of the wind speed of the minute airflow F2 tend to increase. On the other hand, when the air temperature falls below 24° C. and drops by 2° C., the maximum value V1 of the wind speed of the concentrated air flow F1 and the maximum value V3 of the wind speed of the environmental air flow F3 tend to decrease.

With the above configuration, the air blower 1 detects the air temperature of the work space Es with the temperature sensor 17, and the detection signal (temperature information) is received by the processing unit 13 via the input unit 23. Next, the processing unit 13 refers to the control table 19, and in addition to the operation pattern, the cycle Ts of the concentrated airflow F1, the maximum value V1 of the wind speed, and the holding time Tf, the maximum value V2 of the wind speed of the slight airflow F2 and the environmental airflow F3. It is possible to determine the maximum value V3 of the wind speed and send a control signal to the motor 9 and the stepping motor 7 of the blower unit 10 via the instruction unit 15 to control the air flow.

Accordingly, the first operation pattern and the second operation pattern can be determined according to the air temperature of the work space Es, and the wind speed of the airflow can be adjusted, so that a comfortable airflow that matches the thermal sensation of the user Us. It can provide the environment and maintain or improve concentration.

As described above, the blower 1 not only detects the air temperature and automatically controls the operation pattern, the cycle Ts of the airflow, and the maximum values (V1, V2, V3) of the wind speed, but also the user Us can set the preference. If it can also be set manually, the usability will be further improved.

As shown in FIG. 3, the blower device 1 includes an operation pattern selection switch 20 that can be operated from the outside to select an operation pattern.

Further, there is provided a wind speed adjusting switch 21 capable of adjusting the maximum wind speed V1 of the concentrated air flow F1, the maximum wind speed V2 of the minute air flow F2, and the maximum wind speed V3 of the environmental air flow F3.

Further, a cycle adjusting switch 22 capable of adjusting the cycle Ts of the operation pattern is provided.

With the above configuration, when the user Us operates the operation pattern selection switch 20 to select an operation pattern, the information of the selected operation pattern is transmitted to the processing unit 13 via the input unit 23. The processing unit 13 determines an operation pattern via the operation pattern selection unit 16 and sends a signal to the motor 9 and the stepping motor 7 of the blower unit 10 via the instruction unit 15.

Similarly, when the user Us operates the wind speed adjustment switch 21, the selected wind speed information is transmitted to the processing unit 13 via the input unit 23. In the processing unit 13, a command indicating the rotation speed for exhibiting the selected wind speed is determined, and a signal is transmitted to the motor 9 of the blower unit 10 via the instruction unit 15.

Further, even when the cycle adjustment switch 22 is operated, information on the cycle selected by the user Us by operation is transmitted to the processing unit via the input unit 23. The processing unit 13 transmits a signal to the motor 9 and the stepping motor 7 of the blower unit 10 at the timing according to the selected cycle.

As a result, the user Us can select an operation pattern according to his or her preference, change the wind speed (V1, V2, V3) of the airflow, or freely adjust the cycle Ts of the concentrated airflow F1, and thus the user Us's preference. A comfortable airflow environment can be formed. Thereby, the degree of concentration can be appropriately improved according to the user Us.

The operation pattern, the wind speed (V1, V2, V3), and the cycle Ts selected and determined by the operation from the outside are preferentially controlled regardless of the control table 19, which is convenient.

As described above, in the present embodiment, the blower device 1 performs two controls of the first operation pattern in which the concentrated airflow mode and the minute airflow mode are combined and the second operation pattern in which the concentrated airflow mode and the environmental airflow mode are combined. As described above, not only the two operation patterns but also the concentrated airflow mode may be repeated, and the effect of improving the degree of concentration can be obtained.

Further, in the case of the air blower 1 including two or more independent air blowers 10, the concentrated airflow F1 and the minute airflow F2 may be blown simultaneously, or the concentrated airflow F1 and the environmental airflow F3 may be blown simultaneously. The effect is the same.

Further, the period Ts for generating the concentrated airflow F1 defined by the control table 19 does not necessarily have to be a constant interval, and may be an irregular interval as long as it is in the range of 5 minutes or more and 40 minutes or less shown in the present embodiment. Generally, it is known that the concentration level increases or decreases with the passage of time. For example, at the start of work, the relatively high concentration level is likely to continue. The control may be 20 minutes, the second time may be 15 minutes, and the third time and thereafter may be changed at intervals of 10 minutes. That is, the cycle Ts may be shortened according to the number of times the concentrated airflow F1 is repeatedly generated.

Further, like the period Ts, the maximum value V1 of the wind speed of the concentrated airflow F1 and the holding time Tf set in the control table 19 do not have to be constant values, and the maximum value of the wind speed shown in the present embodiment is 0. It may be changed within a range of 5 to 2 m/s and a holding time of 3 to 60 seconds. For example, after the start of work, the maximum wind speed V1 is set to 0.5 m/s, 0.6 m/s, 0.7 m/s and a predetermined wind speed of 0.1 m/s as the number of times the concentrated air flow F1 is generated increases. The holding time Tf may be increased by 3 seconds, 4 seconds, 5 seconds, or a predetermined time of 1 second.

Further, the air blower 1 may include a concentration degree measuring device (not shown) capable of measuring the concentration degree of the user Us in real time. In this case, feedback control may be performed such that the maximum value V1 of the wind speed of the concentrated airflow F1 is increased or the holding time Tf is lengthened by judging the degree of concentration decrease.

The concentration measuring device needs to monitor the concentration of the user non-invasively and detect changes in the concentration at relatively short time intervals (for example, 1 to 10 minutes). The concentration measuring device is preferably non-invasive as well as non-contact, but may include a configuration such as a headband or a wristband that contacts the user. Further, as the concentration degree measuring device, for example, a camera that images a user is used. The acquisition unit 18 illustrated in FIG. 3 acquires information such as body movements, postures, pupil diameters, and blinking frequencies using the image of the user captured by the camera, and the processing unit 13 uses these information alone or By using them in combination, an evaluation value of the degree of concentration is obtained. Here, the processing unit 13 is configured to associate the relationship between these pieces of information and the above-described concentration time ratio and register them in the reference table stored in the storage unit 12. When evaluating the degree of concentration, the processing unit 13 quantifies the degree of concentration by collating the information obtained from the acquisition unit 18 with a reference table and converting the information into a concentration time ratio.

Note that, as described above, the technique of converting the information obtained from the image captured by the camera into the concentration time ratio is an example of the technique of quantifying the concentration degree, and the concentration degree measurement device is a measure of the concentration degree. Other information may be monitored as long as it is the following information. For example, the concentration degree measuring device may be configured to detect a change in skin temperature at a specific site of the user with a thermograph, or to detect an electroencephalogram or a bioelectric current other than the electroencephalogram.

The control table 19 is not determined only by the air temperature. For example, the sensible temperature and the amount of clothing of the user Us are measured by a pile or the like, and the heat index of the user Us is used by using the heat index (PMV or the like). You may change the numerical value of the control table 19 according to a feeling.

Further, when the user Us is provided with a button capable of directly operating the blower device 1 to generate the concentrated airflow F1, the concentrated airflow F1 is generated by pressing the button at a timing desired by the user Us. It may be allowed to.

Further, the control table 19 itself may be rewritable, and for example, the control unit 11 includes a communication device capable of communicating with the outside (a wireless LAN communication device as an example), and an external information terminal (smartphone, personal computer, etc.) The control table 19 information may be transferred.

In the present embodiment, the louver 5 is used as an example of the wind direction changing device, but another example of the wind direction changing device may be a fan having a swing function. When sending the airflow to the unmanned area, turn the head swing angle upward or sideways so that the user Us is not exposed to the airflow, and when sending the airflow to the manned area, move the head swing angle to the front. You may control so that it may return.

Further, in the present embodiment, the example in which the blower device 1 is a floor-standing type device having the bottom structure 2 is shown, but if the positional relationship between the user Us and the blower device 1 is set in advance. The blower 1 may be in the form of a wall mount type or a ceiling mount type. Further, even if the positional relationship between the user Us and the blower device 1 is unknown, the blower device 1 is provided with a human sensor and the like so that a manned area and an unmanned area can be specified and a wind direction of the airflow can be controlled. If so, the airflow control method of the present invention can be used, and the same effect can be obtained.

Further, when it is possible to know which part of the body of the user Us the airflow controlled by the louver 5 hits by using a human sensor, the concentrated airflow mode should be applied to the upper half of the body of the user Us, especially to the head or face. Is desirable. The head and face are areas where the convection temperature boundary layer around the human body is thick, and since skin is relatively exposed in many cases, it is easy to feel the airflow, and the airflow hits it. This is because there is an advantage that it is easy to feel a cool sensation, and it is easy to obtain an impression that the head is refreshed.

Furthermore, if the airflow hits the eyes of the user Us, the concentration of the air may decrease, such as the number of blinks increasing due to dry eyes, so the wind speed may be weakened or the airflow exposure time may be shortened. It is desirable to control so as to make changes.

Further, in the description of the operation steps of the concentrated airflow mode, the minute airflow mode, and the environmental airflow mode, numbers are given in order from the first step, but in the present invention, the order of the operation steps is the point, and the order of the operation steps is reversed. If not, another operation step may be inserted in between.

Moreover, when using the air blower 1 of this Embodiment, the control part 11 needs to start control of the air blower 10 at the time of the user Us starting work. At the time when the control unit 11 starts controlling the blower unit 10, the user Us may directly operate the blower device 1, but using a camera for monitoring the user Us or a sensor for monitoring the user Us, It may be detected that the user Us is seated at a predetermined position.

Further, in the present embodiment, the reference distance between the user Us and the blower device 1 is set to 2 m, but if the work space Es includes a private room such as a child room, it should be used in a large space such as a study cram school or an office. Therefore, it is desirable to assume that the reference distance is about 1.5 to 5.0 m.

In that case, from the equation 1, in order to generate the airflow having the reaching wind speed Vz=0.5 (m/s), the blowing air speed V0 may be set to about 0.7 to 2.4 (m/s).

(Second embodiment)
The configuration of the blower device 50 according to the second embodiment of the present invention will be described with reference to FIG. Note that FIG. 13 is a block diagram showing the configuration of blower device 50 in the present embodiment.

As shown in FIG. 13, the blower device 50 changes the state of the air passing through the main passage 30 in the main passage 30 and the main passage 30 as an air passage that conveys air from the suction port 3 to the fan 8. The air condition changer 31 is provided. In the present embodiment, as an example of the air condition changing unit 31, a filter that removes dust in the air (as an example, a pleated HEPA filter) is used.

In addition, a temporary suction port 32 that can take in air independently of the suction port 3 is provided on the side surface of the blower device 50.

Further, a bypass path 33 that branches from the main path 30 between the fan 8 and the air condition changing portion 31 and communicates with the temporary suction port 32 is provided.

Further, a damper 34 that switches between opening and closing of the temporary suction port 32 is provided near the temporary suction port 32. The damper 34 is provided with a damper drive motor 35 so that opening and closing can be electrically operated, and opening and closing can be controlled by the control unit 11.

With such a configuration, when the control unit 11 controls the instruction unit 15 to close the damper 34, the air taken into the fan 8 passes from the suction port 3 through the main path 30 and the air state change unit 31. Then, the air is blown from the outlet 4.

On the other hand, when the control unit 11 controls the instruction unit 15 to open the damper 34, the air passage connected to the fan 8 communicates from the temporary suction port 32 through the bypass route 33. At this time, the air passage connecting from the suction port 3 through the main path 30 to the fan 8 is always in communication, but the main path 30 has an air condition changing portion 31, and air passes through the air condition changing portion 31. Most of the air sucked by the fan 8 is the air from the bypass path 33 because air resistance is involved in the operation. That is, the bypass passage 33 has a lower pressure loss than the main passage 30.

As described above, the bypass passage 33 is provided as a passage for conveying air to the fan 8 and the opening/closing of the bypass passage 33 is controlled to blow the air that has passed through the air state changing portion 31 or to change the air state changing portion 31. It becomes possible to blow air that does not pass through.

Next, the operation steps of the damper 34 in the present embodiment will be described.

As shown in FIG. 14, in the operation step of the concentrated airflow mode, before the second step (step S02), the control unit 11 performs the bypass opening step of operating the damper drive motor 35 to open the damper 34 ( Step S11). Then, after the fifth step (step S05), the control unit 11 performs a bypass closing step (step S12) that operates the damper drive motor 35 to close the damper 34.

By the above operation steps, the rotation of the fan 8 is accelerated in the second step (step S02), and the bypass passage 33 is connected before the concentrated airflow F1 is generated by increasing the air volume (step S11). Even if the amount of air taken into 8 increases, it is possible to take in air from the bypass route 33 with a low pressure loss. As a result, when the concentrated airflow F1 is generated, the number of rotations of the fan 8 until the maximum value V1 of the wind speed equal to or higher than the threshold value can be reduced, so that noise can be reduced. As a result, the concentration of the user Us is not hindered by noise, and the degree of concentration can be maintained.

Further, since the power consumption of the motor 9 that rotates the fan 8 can be reduced, there is an effect that it contributes to energy saving.

Since the rotation of the fan 8 is decelerated in the fifth step (step S05) after the concentrated airflow F1 is generated, the air volume taken into the fan 8 is reduced. By closing the bypass path 33 after the air volume has decreased (step S12), even if the air passage communicating with the fan 8 is only the main path 30 and the pressure loss increases, the air volume is small originally, so the air volume change amount is small. .. As a result, the changes in the ventilation noise and the wind noise caused by the change in the air volume are reduced, and the noise level is not changed. As a result, it is possible to maintain the degree of concentration without impeding the concentration by giving the user Us an auditory stimulus due to a noise change.

In the present embodiment, as an example of the air condition changing unit 31, a filter that removes dust and dust in the air is used, but other than that, a humidification filter that vaporizes and humidifies water, a dehumidifier that adsorbs moisture in the air. It may be a filter, a heat exchanger that heats or cools the air temperature with a heat pump, or the like.

The above-described embodiment is an example of the present invention. Therefore, the present invention is not limited to the above-described embodiment, and other than this embodiment, depending on the design, etc., as long as it is within the scope of the technical idea of the present invention. Of course, various modifications are possible.

1,50 Blower device 2 Bottom structure 3 Suction port 4 Blowout port 5 Louver 6 Rotating shaft 7 Stepping motor 8 Fan 9 Motor 10 Blower unit 11 Control unit 12 Storage unit 13 Processing unit 14 Timing unit 15 Instructing unit 16 Operation pattern selecting unit 17 Temperature sensor 18 Acquisition unit 19 Control table 20 Operation pattern selection switch 21 Wind speed adjustment switch 22 Cycle adjustment switch 23 Input unit 30 Main path 31 Air condition change unit 32 Temporary suction port 33 Bypass path 34 Damper 35 Damper drive motor Es Working space F1 Concentration Air flow F2 Micro air flow F3 Environmental air flow V1 Maximum wind speed (concentrated air flow F1)
V2 Maximum value of the wind speed of the slight air flow F2 V3 Maximum value of the wind speed of the environmental air flow F3 Ts Cycle Tf Holding time Us User

Claims (10)

A suction port that sucks in air,
An air outlet that blows out the air sucked from the air inlet into the work space,
A fan that generates an airflow from the suction port toward the air outlet,
A motor for driving the fan,
A wind direction changing device that changes the wind direction of the air blown out from the air outlet,
A control unit that controls the operation of the motor and the wind direction changing device;
The control unit is
A first step of directing the wind direction of the air flow blown from the air outlet toward the unmanned area in the working space by the wind direction changing device;
After the first step, a second step of accelerating the rotation of the motor to blow out a concentrated airflow having a wind speed equal to or higher than a predetermined threshold value from the outlet.
After the second step, a third step of changing the wind direction of the concentrated airflow to a manned area in the work space by the wind direction changing device;
After the third step, a fourth step of maintaining a state in which the wind direction of the concentrated airflow is directed to a manned area,
A fifth step of decelerating the rotation of the motor to reduce the wind speed of the airflow after the fourth step;
And a blower for performing a concentrated airflow mode. A minute airflow mode having a step 6a for blowing a minute airflow having a wind speed that is ½ or less of the wind speed of the concentrated airflow from the outlet toward the manned area,
The blower according to claim 1, wherein the control unit includes a first operation pattern that executes the fine airflow mode after the concentrated airflow mode. Equipped with a timekeeping unit that measures time,
The blower according to claim 2, wherein the control unit repeatedly executes the first operation pattern at a preset cycle based on the clock unit. A 6b step of changing the airflow blown from the air outlet by the airflow direction changing device to an unmanned area, and a 7b step of blowing out an environmental airflow having a wind speed lower than the concentrated airflow from the air outlet after the 6b step. With an environmental airflow mode having
The blower according to claim 1, wherein the control unit includes a second operation pattern that executes the environmental airflow mode after the concentrated airflow mode. Equipped with a timekeeping unit that measures time,
The blower according to claim 4, wherein the control unit repeatedly executes the second operation pattern at a preset cycle based on the clock unit. A minute airflow mode having a step 6a of blowing a minute airflow having a wind speed that is ½ or less of the wind speed of the concentrated airflow from the outlet toward the manned area;
A 6b step of changing the airflow blown from the air outlet by the airflow direction changing device to an unmanned area, and a 7b step of blowing out an environmental airflow having a wind speed lower than the concentrated airflow from the air outlet after the 6b step. And an environmental airflow mode having
The control unit is
An operation of selecting, based on an input signal, a first operation pattern for executing the minute airflow mode after executing the concentrated airflow mode or a second operation pattern for executing the environmental airflow mode after executing the concentrated airflow mode. The air blower according to claim 1, further comprising a pattern selection unit. An air temperature detection unit for detecting the air temperature in the working space is provided,
The operation pattern selection unit,
The air blower according to claim 6, wherein temperature information from the air temperature detection unit is used as the input signal, and the first operation pattern or the second operation pattern is selected based on the input signal. The control unit is
An air temperature, a wind speed of the concentrated airflow, a wind speed of the minute airflow, a control table that respectively associates the wind speed of the environmental airflow,
The blower according to claim 7, which determines a wind speed of the concentrated air flow, a wind speed of the minute air flow, and a wind speed of the environmental air flow based on the temperature information detected by the air temperature detection unit and the control table. .. The control unit is
A control table in which the air temperature, the holding time of the fourth step in the concentrated airflow mode, and the cycle of repeatedly executing the first operation pattern or the second operation pattern are associated with each other;
The air blower according to claim 7 or 8, wherein the holding time and the cycle are determined based on the temperature information detected by the air temperature detector and the control table. A main path that conveys air from the suction port to the air outlet,
An air condition changing unit that changes the condition of the air in the main path,
A bypass path that bypasses the air condition changing unit and conveys air to the outlet.
An opening and closing unit that can open and close the bypass path,
Equipped with
The control unit is
A bypass opening step of opening the opening/closing part before the second step;
The blower according to any one of claims 1 to 9, further comprising a bypass closing step of closing the opening/closing portion after the fifth step, and performing the concentrated airflow mode.