JP2009155845A - Daylight shading controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a daylight shading controller capable of enhancing worker's degree of awakening by the stimulus caused by light while saving energy through the utilization of daylight. <P>SOLUTION: This daylight shading controller enables a worker to utilize daylight to prevent the worker from feeling dazzling when he/she sees a daylighting part (to suppress and control worker's sense of dazzling by a controlling means 3) if degree M of awakening of all the workers exceeds a first awakening degree reference value Mth1. On the other hand, if the degree M of awakening of all the workers is below the first awakening degree reference value Mth1 and outdoor illuminance exceeds a predetermined illuminance reference value, quantity of incident light coming into an office room is increased up to such extent that the worker feels dazzling when he/she sees the daylighting part to enhance the worker's degree of awakening by the stimulus caused by light. As a result, worker's degree of awakening is enhanced by the stimulus caused by light while saving energy through the utilization of daylight. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a daylight shielding control device for controlling daylighting indoors by a daylighting unit.

  In recent years, social demands for energy saving are increasing due to environmental concerns such as global warming. In particular, energy-saving control using daylight (sunlight) is expected to be a natural energy utilization, and when daylight is introduced into the office from a window that is a daylighting unit, the user is the original function of the window. It is considered effective from the viewpoint of openness and comfort of the workers because it promotes connection with the external environment. Against this background, with the development of control technology in recent years, daylight shielding control devices that automatically perform daylight shielding (sunlight shielding) according to the state of the external environment by opening and closing the blinds are becoming widespread.

As one of them, the present applicant estimates an evaluation index of the dazzling feeling in the daylighting section based on the outdoor solar radiation state, the indoor lighting device arrangement information, and the opening / closing degree of the blind, and the evaluation index of the dazzling feeling is There has already been proposed a daylight shielding control device that adjusts the degree of opening and closing of the blind so as not to have a value indicating unpleasantness (see Patent Document 1).
JP 2007-120090 A

  By the way, when the awakening level of the person (office worker) at work falls, the technology to improve the awakening level by light stimulation by increasing the illuminance of the office lighting (artificial lighting by the lighting device) has been proposed. Has been. However, increasing the illuminance of the artificial illumination is contrary to the above-described energy saving, and the effect of energy saving by using the daylight of the daylight shielding control device cannot be sufficiently obtained.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a daylight shielding control apparatus capable of improving the arousal level by light stimulation while achieving energy saving by using daylight. It is in.

  In order to achieve the above object, the invention of claim 1 controls the shielding means for shielding daylight incident from the daylighting unit into the office room, and adjusts the light transmittance in the shielding means by a predetermined algorithm. A daylight shielding control device that adjusts the amount of incident light from the daylighting unit, an illuminance detection means for detecting the illuminance outdoors, and a wakefulness acquisition means for acquiring the wakefulness levels of a plurality of workers working in the office Wakefulness evaluation means for evaluating the wakefulness level of all workers using the wakefulness level of each individual worker obtained by the wakefulness level obtaining means, and the control means has a predetermined outdoor illuminance detected by the illuminance detection means. At least one of the illuminance condition that is greater than the illuminance reference value and the first wakefulness condition that the wakefulness of all the workers evaluated by the wakefulness evaluation means is lower than the predetermined first wakefulness reference value is not satisfied. Place Adjusts the transmittance at the shielding means by the algorithm, and increases both the transmittance at the shielding means for a predetermined time compared to the transmittance by the algorithm when both the illumination condition and the first arousal condition are satisfied. It is characterized by that.

  According to the first aspect of the present invention, when the awakening level of all the workers is equal to or higher than the first awakening level reference value, the amount of incident light from the daylighting unit is adjusted by adjusting the light transmittance in the shielding means by a predetermined algorithm. If the wakefulness level of all the workers is lower than the first wakefulness reference value and the outdoor illuminance is larger than the predetermined illuminance reference value, the daylight is used by adjusting By increasing the transparency of the shielding means by time, the worker's arousal level can be improved by light stimulation. As a result, it is possible to improve the arousal level by light stimulation while saving energy by using daylight.

  According to a second aspect of the present invention, in the first aspect of the present invention, the predetermined time includes a second state in which the wakefulness level of all the workers evaluated by the wakefulness level evaluation means is set to a value larger than the first wakefulness level reference value. It is characterized by the time until the arousal level is exceeded.

  According to the invention of claim 2, the arousal level of all office workers can be improved with certainty.

  The invention of claim 3 is characterized in that, in the invention of claim 2, the control means adjusts the transmittance in the shielding means by the algorithm when the predetermined time reaches a predetermined upper limit time.

  According to invention of Claim 3, it can prevent that the working efficiency of a worker falls by receiving a light stimulus for a long time more than necessary.

  The invention of claim 4 is the invention of any one of claims 1 to 3, further comprising operation input receiving means for receiving an operation input by the office worker, and the operation input receiving means receives the operation input within the predetermined time. In this case, the control means adjusts the transmittance of the shielding means by the algorithm.

  According to the invention of claim 4, it is possible to confirm that the awakening level of the worker who has received the light stimulus has been improved by receiving the operation input by the operation input receiving means. Energy saving can be achieved by adjusting the transmittance of the shielding means.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the control means includes an elapsed time from a start time of the predetermined time to a time when an operation input is received by the operation input receiving means, The transmittance of the shielding means within the elapsed time is stored, and when both the illuminance condition and the first wakefulness condition are satisfied, the predetermined amount is determined according to the stored elapsed time and the transmittance. It is characterized by shortening the time or reducing the transmittance.

  According to the invention of claim 5, when it is confirmed that the awakening level of the worker has been improved by the light stimulation, the next time or the predetermined time or the transmission depending on the time when the improvement of the awakening level is confirmed or the transmission level. By adjusting the degree, the arousal level can be improved more comfortably.

  The invention of claim 6 is the invention of any one of claims 1 to 5, wherein the control means starts adjusting the transmittance of the shielding means when both the illuminance condition and the first wakefulness condition are satisfied. Before, it is characterized by comprising notifying means for notifying each worker of the start of adjustment of transparency.

  According to the sixth aspect of the present invention, it is possible to prevent the office worker from being dissatisfied or misjudging a failure by notifying the start of the adjustment of the transmittance in advance.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the first arousal level reference value depends on other conditions such as a time zone and a day of the week based on a history of past arousal levels. It is set to a value.

  According to the invention of claim 7, the arousal level can be improved without impairing the comfort by setting the first arousal level reference value to an appropriate value according to the office environment or individual differences among the workers. Can do.

  According to the present invention, it is possible to improve the arousal level by light stimulation while saving energy by using daylight.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, in the embodiment described below, as in the prior art described in Patent Document 1, the evaluation index of the dazzling feeling in the daylighting unit is estimated based on the outdoor solar radiation state and the blind opening / closing degree, Illustrated is the case of executing an algorithm for adjusting the degree of opening and closing of the blind so that the evaluation index of the dazzling feeling is not a value indicating discomfort, but the algorithm for daylight shielding control is not intended to be limited to that of this embodiment For example, as in the conventional example described in Patent Document 1, the evaluation index of the dazzling feeling in the daylighting unit is estimated based on the outdoor solar radiation state, the indoor lighting device arrangement information, and the blind opening / closing degree. , An algorithm that adjusts the degree of opening and closing of the blinds so that the evaluation index for the feeling of dazzle is no longer an uncomfortable value, or by adjusting the degree of opening and closing of the blinds according to the position of the sun. Algorithm for shielding direct light incident from the section, but may be an algorithm for shielding daylight incident simply from the lighting unit in the time zone of daytime.

  As shown in FIG. 1, the daylight shielding control device A of the present embodiment controls the shielding means B that shields daylight incident on the office room from a lighting section (window) opened in the wall surface of the building (office building). The amount of incident light from the daylighting unit is adjusted by adjusting the light transmittance in the shielding unit B, and is acquired by the solar radiation state acquisition unit 1 that acquires the outdoor solar radiation state and the solar radiation state acquisition unit 1. Evaluation index acquisition means 2 for acquiring a result of estimating an evaluation index of the dazzling feeling in the daylighting unit based on the solar radiation state and the light transmittance in the shielding means B, and a control means 3 for adjusting the transmittance in the shielding means B Illuminance detection means 4 for detecting the illuminance outside, awakening degree acquisition means 5 for acquiring the awakening degree of a plurality of office workers working in the office, and awakening of individual workers acquired by the awakening degree acquisition means 5 All office workers using degree And a degree of awakening evaluation means 6 for evaluating the degree of awakening.

  Here, the daylight shielding control device A of the present embodiment is incorporated in an equipment system that comprehensively controls the environment in the office building as shown in FIG. This equipment system includes a solar shading system comprising the daylight shielding control device A and shielding means B of the present embodiment, an air conditioner installed in a machine room of a building, and a variable amount of wind installed in the back of the office room. An air conditioning system C for controlling a unit (fan coil unit), a lighting system D for controlling a luminaire installed on a ceiling or the like in the office, an illuminometer or solar radiation meter E for measuring outdoor illuminance, and an illuminance The measured value data of the illuminance or the amount of solar radiation measured by the meter or the solar radiation meter E is transmitted to the controller (not shown) of the solar control device 1 and the air conditioning system B via the transmission line Ls for the equipment system, and further to the lighting system C. And a measurement controller F that transmits to a controller (not shown). In the daylight shielding control device A, instead of the illuminance detected by the illuminance detection means 4, the illuminance measured by the illuminometer or the solar radiation meter E and transmitted from the measurement controller F through the signal line Ls by the transmission signal or It is also possible to use measured values of solar radiation. In the present embodiment, data transmission can also be performed via a gateway device (not shown) between a network terminal such as a plurality of personal computers installed on a desk of each office worker in the office room and the solar radiation shielding system. It can be done.

  The shielding means B is a Venetian blind (hereinafter referred to as “blind”) provided in the daylighting section (window) and a pivot that rotates each slat of the blind within a range of 0 to 90 degrees in the vertical plane. A mechanism (not shown), and the rotation mechanism is controlled by the control means 3 of the daylight shielding control device A as described later, so that the slat angle (the slat inclination angle from the horizontal plane in the vertical direction) is controlled. Therefore, the shielding degree (transmittance) of light (daylight) collected from the daylighting unit can be adjusted by changing the "slat angle"). As the shielding means other than the blind, for example, a smart window in which a liquid crystal sheet is interposed between a plurality of glass plates and the light transmittance can be adjusted by controlling energization to the liquid crystal sheet may be used.

  The solar radiation state acquisition means 1 acquires the current time by a clock (system timer) (not shown), and calculates the current solar position (altitude and azimuth angle) based on the location conditions of the building (building latitude and longitude). Direct illumination (lighting unit) from the function, the function of acquiring the vertical plane illuminance in each direction by the illuminance detection means 4, for example, at an interval of 1 minute, and the solar radiation amount obtained by converting the solar position and the illuminance detected by the illuminance detection means 4 And the function of determining the presence or absence of light that is directly incident on the office through the office. The illuminance detection means 4 is provided at an appropriate outdoor location such as a rooftop of a building. However, instead of the illuminance detection means 4, a solar radiation meter that measures the amount of solar radiation may be used to convert the amount of solar radiation into illuminance.

  Further, the evaluation index acquisition means 2 provides a feeling of dazzling that a person in the building feels in a sitting position based on the shielding degree (blind slat angle) of the shielding means B and the solar radiation state consisting of the acquired illuminance and sun position. It is estimated in real time by environmental simulation, and has a function of determining the open / closed degree (permeability) of the blind so that the estimated feeling of glare is in a range that does not cause discomfort.

  The awakening level acquisition means 5 collects, via a network, images obtained by capturing the face and head of a worker who is working (working) using a personal computer via a network, and performs image processing on the images. The awakening level of each worker is detected and acquired in real time based on the frequency at which the worker blinks and the movement of the head. The arousal level evaluation means 6 has a function for estimating the awakening level of all the workers using the awakening level of each individual worker acquired by the awakening level acquisition means 5, and the estimated awakening level (awakening level of all the workers) M Is compared with the first wakefulness level reference value Mth1 and the second wakefulness level reference value Mth2 (Mth1 <Mth2). The method for detecting the arousal level by the arousal level acquisition means 5 and the method for obtaining the arousal level M by the arousal level evaluation means 6 can be realized by a conventionally well-known technique, and thus detailed description thereof is omitted.

  The control means 3 has a function of controlling the turning mechanism of the shielding means B so that the transmittance determined by the evaluation index acquisition means 2 and the blind slat angle coincide with each other. However, the transmittance (opening / closing degree) of the blind indicates the open / closed degree of operation (the degree of direct sunlight transmission) within the range in which the blind operates. For example, the blind has a slat angle θ = 0 ° to 90 °. In the case of a Venetian blind that can be operated in increments of 10 degrees, 0 degrees, 10 degrees, 20 degrees, 30 degrees,..., 90 degrees. Note that the degree of opening and closing of the blinds may be in increments of 1 degree or in increments of 5 degrees. Further, even when the irradiance meter or the illuminometer fails and illuminance information cannot be obtained, the sun position can be used as illuminance information except in the case of cloudy or rainy weather. For example, if the sun position (solar altitude) is about 20 ° or more, the light stimulation by daylight can be given to the office worker by increasing the transmittance of the shielding means B.

  The control unit 3 also has a function of correcting the transmittance determined by the evaluation index acquisition unit 2 in accordance with the evaluation result of the arousal level M by the arousal level evaluation unit 6. That is, when the arousal level evaluation means 6 evaluates that the arousal level M has decreased to the first arousal level reference value Mth1 or less, the control unit 3 determines the transparency determined by the evaluation index acquisition unit 2 (opening / closing of the blinds). The degree of wakefulness M is increased by increasing the degree of wakefulness (the degree of wakefulness). However, when the awakening level M of all the workers is increased to the second awakening level reference value Mth2 by the awakening level improvement control, the control means 3 ends the awakening level improvement control, and the transmittance determined by the evaluation index acquisition means 2 The normal control for matching the slat angle of the blind (hereinafter referred to as “glare sensation suppression control”) is resumed.

  Next, the operation of this embodiment will be described with reference to the flowchart of FIG.

  First, when the daylight shielding control device A is started, the solar radiation state acquisition means 1 reads information (such as the latitude and longitude of the building) relating to a building (office building) stored in advance in a memory (not shown) (step) S1) Further, the current time is acquired from the system timer at an interval of 10 to 30 (minutes) (step S2), and the current time and the location where the apparatus is installed, which is registered in advance or acquired from GPS, etc. The current position of the sun is calculated based on the position information (step S3). The calculation of the sun position can calculate the solar altitude and the solar azimuth by an appropriate known calculation method based on the latitude and longitude of the building and the current time. Subsequently, the solar radiation state obtaining unit 1 calculates the incident angle to the daylighting unit and the apparent altitude (the altitude obtained by correcting the solar altitude in the direction perpendicular to the daylighting unit). Here, as shown in FIG. 4, the incident angle i 'to the daylighting part is expressed by the following equation, where the current solar altitude is h [°], the azimuth angle is A [°], and the window surface orientation A0.

i ′ = cos−1 [cos (h) × cos (A−A0)]
The apparent height h ′ is h ′ = arc tan [tan (h) / cos (A−A0)].
It becomes. In FIG. 4, E, W, S, and N indicate east, west, south, and north directions, and Z indicates a vertical direction.

  The solar radiation state acquisition unit 1 determines the presence or absence of direct light on the daylighting unit from the calculated incident angle i ′ to the daylighting unit, and collects the vertical plane illuminance in each direction from the illuminance detection unit 4 (step S4).

  As described above, when the solar radiation state acquisition unit 1 completes the acquisition of the time, the calculation of the sun position, and the direct light incident determination, the evaluation index acquisition unit 2 determines the optimum slat angle (step S5 to step S6). The candidate of the transmittance of the shielding means B) is obtained by performing simulation by changing 10 degrees in the range of 0 degrees to 90 degrees. In this loop, the dazzling feeling is predicted by environmental simulation in step S5. In this prediction, a dazzling feeling (glare feeling) is predicted using an evaluation index PGSV (Predicted Glare Sensation Vote) of the dazzling feeling (glare feeling). This PGSV is proposed as a formula to evaluate the feeling of glare when using daylight (Tokura, Iwata et al .: "Experimental study on the evaluation method of glare caused by daylight from a window, Part 1 Experiment using a light environment laboratory" "Academic Lecture Summary of the Architectural Institute of Japan, 1992.2.8"), and a formula (see Equation 1) that correlates the contrast between the light source and background brightness against the window surface and the glare of the resident. Expressed.

Lb: background luminance [cd / m ² ]
Lseq: equivalent uniform luminance (light source luminance) [cd / m ² ]
ω: solid angle of light source [sr]
Thus, the evaluation index acquisition means 2 determines whether or not the value of the evaluation index PGSV obtained from the above formula is within an allowable range where it does not feel uncomfortable. The candidate is determined as the slat angle, and the loop is exited. Here, the scale of the evaluation index PGSV is as shown in Table 1. Based on this scale, the allowable range is set to a range of 0.0 to 2.0, for example.

  Then, the slat angle determined by the evaluation index acquisition means 2 is transferred to the control means 3, and the control means 3 controls the turning mechanism of the shielding means B so as to be the determined slat angle, thereby opening and closing the blinds (transmission). (Degree) is adjusted (step S7).

  On the other hand, when the daylight shielding control device A is started, the awakening degree acquisition means 5 detects the awakening degree of each worker who works in the office, and the awakening degree evaluation means 6 acquires the awakening degree acquisition means 5. The awakening level M of all office workers is evaluated from the awakening level of each office worker (step S8). FIG. 5 shows the wakefulness level M (solid line a) obtained by the wakefulness level evaluation means 6. The wakefulness level M gradually decreases from the time when the lunch break ends (13:00), and is the lowest between 14:00 and 15:00. It has a tendency to gradually rise after 15 o'clock. Upon receiving the latest wakefulness level M from the wakefulness level acquiring means 5, the wakefulness level evaluation means 6 determines whether or not the control means 3 is executing the wakefulness level improvement control (step S9), and the wakefulness level improvement control is being executed. Otherwise, it is determined whether or not the arousal level M is lower than the first arousal level reference value Mth1 (step S10). If the wakefulness level M is equal to or higher than the first wakefulness level reference value Mth1, the process returns to step S8, and the wakefulness level acquisition means 5 acquires a new wakefulness level M.

  If it is determined that the wakefulness level M is lower than the first wakefulness level reference value Mth1, the wakefulness level evaluation means 6 determines a correction value for causing the control means 3 to execute the wakefulness level improvement control (step S11). The upper limit value of the allowable range for the value of the evaluation index PGSV is corrected (step S12). For example, the upper limit value of the allowable range that is normally set to 2.0 is corrected to 2.5.

  When the upper limit value of the allowable range is corrected in this way, the slat angle determined by the evaluation index acquisition unit 2 also becomes relatively large (steps S5 to S6). As a result, the blind opening / closing controlled by the control unit 3 is increased. As the degree (transmittance) increases, the feeling of dazzling increases, so that the worker's arousal level M is gradually improved by light stimulation as shown by the broken line in FIG. However, in order to improve the awakening level M of the office worker by light stimulation, it is a necessary condition that a certain amount of direct light is incident from the daylighting unit. Therefore, the outdoor illuminance detected by the illuminance detection means 4 is determined in advance. An illuminance condition that is greater than a predetermined predetermined illuminance reference value, and a first wakefulness condition that the wakefulness level M of all workers evaluated by the wakefulness level evaluation means 6 is lower than the first wakefulness level reference value Mth1; Only when both of these are satisfied, the control means 3 executes the arousal level improvement control.

  Then, the control means 3 executes the above-described wakefulness improvement control until the wakefulness M becomes equal to or higher than the second wakefulness reference value Mth2, and when the wakefulness M becomes equal to or higher than the second wakefulness reference value Mth2 (step S13). The arousal level evaluation means 6 deletes the correction value so that the control means 3 finishes the awakening level improvement control and returns to the normal dazzling feeling suppression control (step S13), and the permissible range for the value of the evaluation index PGSV is exceeded. The upper limit value is returned to the original value (2.0) (step S12).

  Thus, according to the present embodiment, when the awakening level M of all the office workers is equal to or higher than the first awakening level reference value Mth1, the office staff does not feel dazzling when looking at the daylighting unit. When daylight is used (control to control glare sensation by the control means 3), the awakening level M of all office workers is lower than the first awakening level reference value Mth1 and the outdoor illuminance is greater than the predetermined illuminance reference value By increasing the amount of incident light into the office room to such an extent that the office worker feels dazzling when looking at the daylighting section, the awakening level of the office worker can be improved by light stimulation, resulting in daylight use It is possible to improve the arousal level by light stimulation while saving energy. Further, the wakefulness level M of all the workers who evaluate the wakefulness level improvement control by the wakefulness level evaluation means 6 for the predetermined time during which the control means 3 executes the wakefulness level improvement control is set to a value larger than the first wakefulness level reference value Mth1. By setting the time Tm until the two awakening level reference values Mth2 are exceeded (see FIG. 5), the awakening level M of all the workers can be reliably improved. If the awakening level M of all the workers does not improve much even if the awakening level improvement control is executed, not only will discomfort increase if the light stimulus is continuously given to the office workers, but it also goes against energy saving. Become. Therefore, an upper limit value is set for the predetermined time Tm for executing the arousal level improvement control, and even if the awakening level M does not reach the second arousal level reference value Mth2 or higher, the upper limit is set from the start of the awakening level control. When the value elapses, the arousal level evaluation means 6 deletes the correction value, and if the control means 3 stops the awakening level improvement control and returns to the normal glare suppression control, the light stimulus is made longer than necessary. By receiving it, it is possible to prevent the work efficiency of the office worker from deteriorating.

  On the other hand, for the workers whose arousal level has already increased to the second arousal level reference value Mth2 until the arousal level M of all the workers has increased to the second arousal level standard value Mth2 or more, more light stimulation than necessary is required. You may feel uncomfortable by receiving. Therefore, the operation input receiving means 7 for receiving the operation input of the office worker whose wakefulness has been improved early is provided in the daylight shielding control device A. When the operation input is received by the operation input receiving means 7, the control means It is desirable to forcibly stop the arousal level improvement control to 3 and return to the dazzling feeling suppression control. That is, by receiving the operation input by the operation input receiving means 7, it can be confirmed that the awakening level of the worker who has received the light stimulus has been improved, and thereafter, by performing the dazzling feeling suppression control. Energy saving can be achieved. The operation input receiving means 7 may be a manual switch installed in the office, or displays a button on the screen of the office worker's personal computer using the web server function, and the button An operation input may be received when clicked with an input device such as a mouse.

  In addition, the control unit 3 determines the elapsed time from the start of wakefulness improvement control to the time when the operation input is received by the operation input receiving unit 7, and the transmittance (the degree of opening / closing of the blind) in the shielding unit B within the elapsed time. ) And then executing the arousal level improvement control, the predetermined time Tm may be shortened by a predetermined amount corresponding to the stored elapsed time and transmittance, or the transparency may be decreased. That is, when it is confirmed that the wakefulness level of the office worker has been improved by the light stimulus when the operation input accepting means 7 accepts the operation input, the next time or later is determined according to the time and the transmission level at which the improved wakefulness level is confirmed. By adjusting the predetermined time Tm or the transmittance, the arousal level can be improved more comfortably.

  By the way, when the office worker does not recognize that the control content performed by the control means 3 is switched from the dazzling feeling suppression control to the awakening degree improvement control, the office worker may be dissatisfied with the increased dazzling feeling. Alternatively, it may be erroneously determined that the daylight shielding control device A has failed. Therefore, before the control means 3 starts the arousal level improvement control, the office staff is dissatisfied by notifying each office worker of the start of the awakening level improvement control by a notification means (not shown), It is desirable to prevent misjudgment. Such notification means can be realized by, for example, an electronic bulletin board installed in the office room or software that displays a pop-up message on the screen of the personal computer of the office worker.

  By the way, it is considered that the characteristics of the arousal level M are greatly different depending on the number of office workers working in the office and individual differences among the office workers. Accordingly, if the first arousal level reference value Mth1 is set too high, the arousal level improvement control is frequently executed in the offices where the awakening level M of all the office workers is relatively low, so that the discomfort of the office worker increases. At the same time, the achievement level of energy savings decreases, and conversely, if the first arousal level reference value Mth1 is set too low, awakening level improvement control is hardly executed in offices where the arousal level M of all workers is relatively high. End up. Therefore, in order to improve the arousal level without impairing the comfort, the condition that the awakening level M significantly decreases in the office from the history of the awakening level M over the past weeks or months, It is desirable to find out the day of the week and set the first arousal level reference value Mth1 according to these conditions.

It is a block diagram which shows embodiment of the solar radiation control apparatus which concerns on this invention. It is a system configuration figure of an equipment system including the same as the above. It is a flowchart for operation | movement description same as the above. It is explanatory drawing of calculation of the solar position in the same as the above. It is explanatory drawing of the arousal degree improvement control in the same as the above.

Explanation of symbols

A daylight shielding control device 1 solar radiation state acquisition means 2 evaluation index acquisition means 3 control means 4 illuminance detection means 5 wakefulness acquisition means 6 wakefulness evaluation means

Claims (7)

Daylight shielding control device that controls the shielding means that shields daylight incident from the daylighting unit into the office room, and adjusts the amount of incident light from the daylighting unit by adjusting the light transmittance of the shielding unit according to a predetermined algorithm Because
Work using the illuminance detection means for detecting the illuminance outdoors, the wakefulness acquisition means for acquiring the wakefulness level of multiple office workers working in the office, and the individual worker's wakefulness level obtained by the wakefulness level acquisition means Awakening degree evaluation means for evaluating the awakening degree of all persons,
The control means has an illuminance condition that the outdoor illuminance detected by the illuminance detection means is larger than a predetermined illuminance reference value, and the arousal level of all the workers evaluated by the arousal level evaluation means is greater than a predetermined first arousal level reference value. If at least one of the first arousal level conditions of low is not satisfied, the transmittance of the shielding means is adjusted by the algorithm, and if both the illuminance condition and the first arousal level condition are satisfied, the algorithm A daylight shielding control device, wherein the transmittance of the shielding means is increased for a predetermined time from the transmittance of the light.   The predetermined time is a time until the wakefulness of all office workers evaluated by the wakefulness evaluation means exceeds the second wakefulness reference value set to a value larger than the first wakefulness reference value. The daylight shielding control device according to claim 1.   3. The daylight shielding control apparatus according to claim 2, wherein the control means adjusts the transmittance of the shielding means by the algorithm when the predetermined time reaches a predetermined upper limit time.   An operation input receiving means for receiving an operation input by a worker is provided, and when the operation input is received by the operation input receiving means within the predetermined time, the control means adjusts the transparency of the shielding means by the algorithm. The daylight shielding control device according to any one of claims 1 to 3.   The control means stores the elapsed time from the start of the predetermined time to the time when the operation input is accepted by the operation input accepting means, and the transmittance in the shielding means within the elapsed time, and then the illuminance condition and the first 5. If both of the conditions for arousal level 1 are satisfied, the predetermined time is shortened or the transmittance is decreased by a predetermined amount corresponding to the stored elapsed time and transmittance. The daylight shielding control device according to any one of the above.   Provided with an informing means for informing each worker of the start of adjustment of the transmittance before the control means starts adjusting the transmittance in the shielding means by satisfying both the illumination condition and the first arousal condition. The daylight shielding control device according to claim 1, wherein the daylight shielding control device is provided.   The first arousal level reference value is set to a value according to another condition such as a time zone or a day of the week based on a past awakening level history. The daylight shielding control device described.