JP2007120090A - Solar radiation shading control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar radiation shading control device which makes use of daylighting without a feel of glare of a daylighting section by a person in a building, comfortably maintains the indoor environment, is low in cost, and good in daylighting appearance. <P>SOLUTION: A blind Icont 11 or the solar radiation shading control device is formed of: a solar radiation acquiring section 12 for acquiring a solar radiation state of the outdoors; an evaluation index acquiring section 12 for acquiring a simulation result of an evaluation index of glare at a window W, based on arrangement information of a lighting device 2, the solar radiation state, and an opening/closing degree of the blind 1; and a control section 13 for adjusting the opening/closing degree of the blind 1 such that the acquired evaluation index of glare falls out of a value indicative of discomfort. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a solar shading control device for controlling indoor lighting provided with a lighting device.

In recent years, social demands for energy saving due to global warming have increased. 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 recent development of control technology, solar shading control devices that automatically perform solar shading according to the state of the external environment by opening and closing the blinds are becoming widespread. As one of them, the angle of the surface of the blind is controlled to an appropriate angle based on the altitude of the sun, the sunlight is reflected by the reflecting surface of the blind surface, and the sunlight is taken indoors, and the diffusion surface or absorption of the rear surface of the blind A daylighting device that diffuses or absorbs sunlight by a surface is provided (for example, Patent Document 1).
JP 2000-170467 A (FIG. 1, paragraph numbers 0021 to 0031)

  When daylight (sunlight) is introduced indoors as in the daylighting device disclosed in Patent Document 1 described above, the window surface itself becomes a large-scale light source surface, so that the person in the room is dazzled. I often feel discomfort due to the problem.

  In order to solve such a problem, in the general blind control, the sun T light (sunlight) is not transmitted at the time of fine weather shown in FIG. 13A or cloudy weather shown in FIG. By adding an angle (hereinafter, referred to as an offset angle θ) that shields incident light, a feeling of glare on the surface of the slat 1a of the blind 1 is suppressed. This offset angle θ is further shielded from sunlight from an angle at which normal sunlight does not transmit to such an extent that a person in the room does not feel glare in a time zone in which the amount of solar radiation is likely to cause glare. This offset angle θ uses a fixed value regardless of the external (outdoor) situation and time. However, the peak of glare is limited during the year, and most of the year is shielding the sun more than necessary. This was not sufficient from the viewpoint of energy saving and view.

  There is also a method in which an illuminance sensor is installed near the window in the room and in each room, and a dazzling feeling of a person in the room is predicted from the illuminance and used for blind control. This method is highly accurate as a method for predicting the dazzling feeling of people in the room, but since it is necessary to install an illuminance sensor in each room, the number of sensors increases, so the appearance near the window is poor and the cost is low. There is a problem that the

  The present invention has been made in view of the above points, and the purpose of the present invention is to enable daylight use without feeling dazzling when an indoor person looks at the daylighting unit. Another object of the present invention is to provide a solar shading control device that can maintain an indoor environment comfortably, is inexpensive in cost, and has a good daylighting appearance.

  In order to achieve the above-mentioned object, in the invention of claim 1, a shielding means is provided in a daylighting section for daylighting provided with an illumination device, and the opening and closing degree of the shielding means is adjusted to adjust indoors. A solar shading control device that controls the amount of incident light that enters the solar radiation state acquisition unit that acquires an outdoor solar radiation state, the lighting unit based on the arrangement information of the illumination device, the solar radiation state, and the open / closed degree An evaluation index acquisition unit that acquires a result of simulating an evaluation index of a dazzling feeling and a control unit that adjusts the degree of opening and closing so that the acquired evaluation index of the dazzling feeling is not a value indicating discomfort It is characterized by that.

  According to the first aspect of the present invention, daylight can be used so that a person who is indoors does not feel dazzling when he / she looks at the daylighting unit, so that the illumination energy can be reduced and the indoor environment can be reduced. Can be maintained comfortably, and since the opening / closing degree of the shielding means is adjusted by simulation, it is not necessary to provide an illuminance sensor or the like indoors, so that the appearance of the daylighting section can be improved and the cost is low. .

  According to a second aspect of the present invention, in the first aspect of the invention, the evaluation index acquisition unit is a data table of the evaluation index calculated by changing the solar radiation state and the open / closed degree in a state where a lighting device is disposed indoors. And the evaluation index of the solar radiation state and the opening / closing degree is acquired based on the data table.

  According to the invention of claim 2, since the evaluation index is calculated in advance, the evaluation index can be acquired at high speed even if the evaluation index acquisition unit is configured with a relatively low processing capacity and an inexpensive arithmetic device. Can do.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the shielding means is constituted by a Venetian blind, and further includes a solar position acquisition means for acquiring a solar position at the time of controlling the amount of incident light. The unit acquires the evaluation index based on the solar position.

  According to the third aspect of the invention, the reflected light between the slats of the Venetian blind can be taken into account, and therefore, the control considering the dazzling feeling can be performed also in the Venetian blind.

  According to a fourth aspect of the present invention, in the third aspect of the invention, there is provided direct light determining means for determining whether to enter a field of view when the daylighting unit is viewed from the indoors based on the sun position and the degree of opening / closing. The controller is configured to prevent the sun from entering the field of view when the direct light determining unit determines that the direct light from the sun enters the field of view when the daylighting unit is viewed from the indoor. It is characterized by controlling.

  According to the invention of claim 4, even if the feeling of glare is suppressed, it is possible to maintain a comfortable indoor environment by preventing direct light from entering the eyes and causing discomfort. it can.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, the control unit includes a weather determination unit that determines whether the sky is clear or cloudy based on the altitude of the sun and the illuminance of the daylighting unit. The open / close degree is adjusted to be fully open when the weather determination unit determines that the weather is cloudy.

  According to the fifth aspect of the present invention, it is possible to provide a comfortable environment that provides a feeling of openness to those who are indoors by fully opening the shielding means in the case of cloudy weather that does not give discomfort due to the dazzling feeling.

  The present invention can use daylight so that a person who is indoors does not feel dazzling when looking at the daylighting unit, and thus can reduce illumination energy and maintain an indoor environment comfortably. In addition, since the opening / closing degree of the shielding means is adjusted by simulation, it is not necessary to provide an illuminance sensor or the like indoors, so that the appearance of the daylighting section can be improved and the cost can be reduced.

  Embodiments of the present invention will be described below.

(Embodiment 1)
FIG. 1 shows a part of a building equipped with the solar radiation shielding device of the present invention. A window portion W is opened as a daylighting portion on the wall of the building, and the window portion W has a Venetian blind (hereinafter referred to as a blind). ) Illuminance for detecting the illuminance of the lighting device 2 of the lighting system and the upper surface (desk upper surface) of the desk D arranged in the target area X on the ceiling CE of the target area X that is equipped with shielding means 1 and indoors A sensor 3, an air outlet 4 of the air conditioning system, and a temperature / humidity sensor 5 for detecting the air conditioning environment (temperature / humidity) of the target area X are provided. Further, an illuminometer 6 (or a solar radiation meter for measuring the amount of solar radiation) 6 provided at an appropriate outdoor location on the rooftop or the like for acquiring the solar radiation state and measuring the vertical surface illuminance in each direction is provided. As the shielding means, for example, a smart window that performs shielding by changing the light transmittance by controlling energization of a liquid crystal sheet interposed between glass plates may be used.

  The air conditioning system includes an air conditioner 8 provided in a machine room and the like, a variable air volume unit 9 provided on the back of the ceiling CE, and the temperature / humidity sensor 6 that detects the air conditioner 8 and the variable air volume unit 9. It is comprised with the air conditioning Icont (Intelligent Controller) 7 controlled based on humidity. The illumination system includes an illumination Icont 10 that controls the light output of the illumination device 2 with a dimming function based on the detected illuminance of the illuminance sensor 3.

  The solar radiation shielding device of the present embodiment includes a blind 1, an illuminometer (or solar radiation meter) 6, and a blind Icont 11.

  And the measurement icon 16 that collects information from each of the icons 7, 10, 11 and the illuminance meter (irradiance meter) 6 is connected to a floor integrated controller 17 that constructs a host system for integrating and controlling the environment of the entire building. For this connection, for example, a dedicated transmission line for building automation is used, and information can be exchanged by a signal of a predetermined standard.

  Here, the present invention is a solar radiation shielding control device, and the cooperation with the host system is an additional configuration, and therefore the description of the cooperation operation with the host system is omitted here.

  As shown in FIG. 2, the blind Icont 11 serving as the center of the solar radiation shielding control device according to the present embodiment includes a solar radiation state acquisition unit 12, an evaluation index acquisition unit 13, and a control unit 14. The solar radiation state acquisition unit 12 acquires the current time by a system timer (not shown), and calculates the current solar position based on the location conditions (latitude and longitude of the installation location) of the target building. Direct light for determining the presence or absence of direct light from the solar position state and the solar radiation state measured by the illuminometer 7a, for example, the function of acquiring the vertical plane illuminance in each direction from the illuminometer 7a at an interval of 1 minute, for example It has a function as a judgment means and a function as a weather judgment means for judging the weather from the solar altitude and the vertical surface illuminance. A solar radiation meter may be provided instead of the illuminometer 7, and the measured solar radiation amount may be converted into illuminance.

  In addition, the evaluation index acquisition unit 13 provides a real-time feeling of glare that the person M in the target area X feels in a sitting position based on the degree of opening and closing of the blind 1 and the solar radiation state including the acquired illuminance and sun position in real time by environmental simulation. It has a function to calculate and to determine the degree of opening and closing of the blind 1 so that the calculated feeling of glare is below a reference value that does not give unpleasant feeling. However, the degree of opening / closing of the blind 1 is the degree of opening / closing that can be operated within the range in which the blind 1 operates. For example, the blind 1 can operate in increments of 1 ° within a slat angle of 0 ° to 90 °. In the case of a blind, the offset angle θ is 0 °, 1 °, 2 °, 3 °,..., 90 ° −α °. When the shielding means is not a blind 1 but a smart window, the transmittance is 0%, 1%, 2%, 3%,..., 100%.

  The control unit 14 compares the blind open / closed degree obtained by the evaluation index acquiring unit 13 with the past blind open / closed degree, and applies a restriction so that the open / closed degree of the blind 1 does not change beyond a predetermined set value. A function of controlling the degree of opening and closing of the blind 1 is provided.

  Next, the operation of this embodiment will be described based on the flowchart of FIG.

First, when the solar radiation shielding control device is started, the solar radiation state obtaining unit 12 of the blind icon 11 obtains the current time at intervals of 10 to 30 (minutes) from the system timer (step S1), and is registered in advance as this current time. Or the current position of the sun T based on the position information of the installation location of the device acquired from the GPS or the like and the positional relationship of the window W facing the target area X (step S2). ). In this step S2, the solar position is calculated by first calculating 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. Next, the incident angle to the window W surface and the apparent altitude (the altitude obtained by correcting the solar altitude in the direction perpendicular to the window surface) are calculated as the positional relationship of the window W. Here, as shown in FIG. 4 (a), the incident angle of the window surface is the incident angle to the window surface when the current solar altitude is h [°], the azimuth angle is A [°], and the window surface direction A0. i ′ is i ′ = cos−1 [cos (h) × cos (A−A0)].
It becomes.

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

The solar radiation state acquisition unit 12 determines the presence or absence of direct light on the window surface from the calculated incident angle i ′ to the window surface. In this case, as shown in FIG. 4B, a range β where the direct light is incident on the target area X and a range γ where the direct light is not incident are determined from the position of the sun T and the length L of the ridge on the window W side, and the area For example, a process of determining whether or not direct light is incident on the field of view of the person M working at the desk D from the position and direction of the desk D in A is performed. Further, as shown in FIG. 5, the solar radiation state acquisition unit 12 takes the solar altitude h [°] <or the apparent solar altitude h ′ [°]> as the horizontal axis and the vertical surface illuminance detected by the illuminometer 7 as the vertical axis. A sunny area (b) and a cloudy area (b) are set from the relationship between the two, and the current solar altitude h [°] <or apparent solar altitude h '[°]> and the vertical surface illuminance are set in this setting area. Determine the current weather. The threshold value of the setting area in FIG. 5 is changed according to the solar altitude, thereby reducing the false detection rate at sunset.

  As described above, when the solar radiation state acquisition unit 12 completes time acquisition, solar position calculation, direct light incident determination, and weather determination, the evaluation index acquisition unit 13 in the target area X in the next step S3. The process of calculating the dazzling sensation felt by the person M located in the environment by an environmental simulation is performed to determine the optimum degree of blind opening / closing. This environmental simulation may be performed by using a well-known method (for example, Masanori Sukutani, studying architectural environment of light and heat studied by numerical calculation “Window and natural room illumination” published by Maruzen Co., Ltd.). FIG. 6 shows an example of this, and in this method, a database DB storing the characteristics of the window portion W of the building, the air conditioning environment, lighting (including lighting fixture arrangement information), and target area (room) X is provided. Based on the information in this database DB, preparation for prediction of dazzling feeling is made in the construction of the building model in step S10, and the current time and the vertical surface illuminance are fetched from the solar radiation information acquisition unit 12 (step S11), and step In the loop of S12 to S16, the dazzle optimum opening / closing degree candidate is obtained by performing a simulation by changing the offset angle θ by 1 ° in a range of 0 ° to 90 ° −α °, for example. In this loop, the dazzling feeling is predicted by environmental simulation in step S13. In this prediction, a dazzling feeling (glare feeling) is predicted using a prediction formula PGSV (Predicted Glare Sensation Vote) of a dazzling feeling (glare feeling). This PGSV is proposed as a formula that predicts the feeling of glare when using daylight (Tokura, Iwata et al .: “Experimental study on the evaluation method of glare caused by daylight from windows, Part 1 Using the light environment laboratory” , "Architectural Lecture of the Architectural Institute of Japan, 19922.8"), a formula that relates the luminosity of the light source and background to the window surface and the glare of the resident (feeling of glare) >.

Ｌｂ：背景輝度［ｃｄ／ｍ^２ ］
Ｌseq：相当均一輝度（光源輝度）［ｃｄ／ｍ^２］
ω： 光源の立体角［ｓｒ］
但しＰＧＳＶとは元来、窓の最適設計のために提案された指標であり、ブラインドの開閉度の制御に利用される例はない。

Lb: background luminance [cd / m ² ]
Lseq: equivalent uniform luminance (light source luminance) [cd / m ² ]
ω: solid angle of light source [sr]
However, PGSV is an index originally proposed for optimal design of windows, and there is no example used for controlling the degree of opening and closing of blinds.

  Thus, the PGSV predicted in step S14 is compared with the set PGSV value, and when it is smaller than the set PSVG value, the optimal glare opening / closing degree is determined in step S14, and the loop is exited. Here, the scale of PGSV is as shown in Table 1, and the set PSVG value is set from this scale. In other words, if the PSVG value is less than 1.0 where dazzling starts to be worrisome, it can be determined that the degree is not concerned.

ループを抜けると、ステップＳ１７において眩しさ感が基準以下となるブラインド１の開閉度の算出、つまり外部の状態とそれに対応するブラインド１の開閉度の算出を行う、シミュレーションを終了するとともに、算出した開閉度を制御部１４に受け渡す。制御部１４は図３のステップＳ４において、ブラインド１の最適な開閉度のハンチング処理を行う。つまり制御部１４は受け渡された開閉度と、過去のブラインド開閉度とを比較して、予め設定している所定の設定値以上にブラインド１の開閉度が変化しないように制限を加えながら最適なブラインド１の開閉度を決定し、ブラインド１のスラット１ａの角度制御を行うのである。

After exiting the loop, calculation of the degree of opening / closing of the blind 1 in which the feeling of dazzling is below the reference in step S17, that is, calculation of the external state and the degree of opening / closing of the blind 1 corresponding thereto, is completed, and the simulation is finished. The degree of opening / closing is transferred to the control unit 14. In step S4 of FIG. 3, the control unit 14 performs hunting processing for the optimum opening / closing degree of the blind 1. In other words, the control unit 14 compares the passed degree of opening and closing with the past degree of blind opening and closing, and is optimal while restricting the degree of opening and closing of the blind 1 so as not to change beyond a predetermined set value. The opening / closing degree of the blind 1 is determined, and the angle control of the slat 1a of the blind 1 is performed.

  The angle control of the slat 1a is performed by offset angle θ with respect to an angle at which sunlight is not transmitted as shown in FIG. 7A within a range where direct light does not enter the field of view of the person M who is working (working) in the target area X. Make adjustments. If direct light is incident on the line of sight, the degree of opening / closing of the blind 1 is adjusted while forcibly limiting the set value to the range where direct light is not incident.

  In the above PGSV, a single luminance surface is assumed as the light source and the surface. Therefore, when a luminance distribution such as a smart window does not occur, the entire window surface can be regarded as a single light source surface. PGSV can be calculated from the brightness reflected from the surrounding wall surface. However, in the case of the blind 1 such as the Venetian blind, a distribution is generated between the luminance reflected by the surface of the slat 1 and the sky surface luminance transmitted through the gap between the slats 1a. In particular, when the sun T is directly confirmed from the gap between the slats 1a, the influence becomes large. Therefore, in the present embodiment, the PGSV is calculated by adopting the light source luminance that is larger than both the luminances instead of the average luminance in which the entire window surface is regarded as a single luminance. Further, when the sun T is directly confirmed from the gap between the slats 1a of the blind 1 or when the incident light is incident on the work surface of the person M in the target area X, it is excluded from the PGSV calculation as described above. Use a degree of opening and closing in a range where no direct light is forced.

  In addition, in order to obtain a feeling of openness when the weather determined by the sun position and external (outdoor) illuminance is cloudy when the external illuminance is low and dazzling is not a problem or when it is determined that there is no direct light Control is performed so that the slat 1a of the blind 1 is set horizontally and the blind 1 is opened.

  By the way, when the weather changes drastically, the illuminance measured on the roof may frequently rise or fall with respect to a threshold value that is determined to be cloudy. On the other hand, sunlight may suddenly enter the target area X from a cloudy state and give glare.

  Therefore, in the solar radiation state acquisition unit 12, as shown in the flowchart of FIG. 8, in step S21, the illuminance detected by the illuminometer 6 is compared with the threshold value for determining cloudy weather. In step S22, the control unit 14 determines whether or not the cloudy day determination has been performed for a predetermined number of times N within a predetermined time, and when it is smaller than the predetermined number N, that is, when it is determined that the cloudy day determination has continued for a predetermined time. In step S23, the degree of opening and closing that opens the blind 1 as described above is employed. On the other hand, when the illuminance is greater than or equal to the threshold value, or when the number of counts is a predetermined number N in the determination in step S22, that is, when the cloudy sky determination is intermittent, discomfort due to glare is less than the reference value in step S24 When the open / closed degree is obtained from the evaluation index obtaining unit 13 and further, it is determined in step S25 whether or not the direct light is incident from the direct light incident determination in the solar radiation state obtaining unit 11, and the direct light is incident. In step S26, an opening / closing degree at which direct light is not incident is adopted. When direct light is not incident, the degree of opening / closing acquired from the evaluation index acquisition unit 13 in step S27 is employed. In step S28, the open / closed degree adopted as described above is compared with the past open / closed degree, and the blind 1 is controlled so as not to change to the set value or more.

  When the processing operation according to the above-described flowchart is expressed by the relationship between cloudy sky determination and external illuminance, as shown in FIG. 9, control corresponding to cloudy is performed in a period t1 in which the external illuminance is lower than the threshold value L0. However, when the external illuminance exceeds the threshold value L0, there is a high risk that it will become dazzling rapidly. In addition, control corresponding to clear sky is performed in the period t2 in which the external illuminance is higher than the threshold value L0. However, when the external illuminance falls below the threshold value L0, the external illuminance is set to the threshold value in a certain period t3 to avoid hunting. When the state exceeding L0 continues, control corresponding to cloudy weather is started (t4).

According to the present embodiment configured as described above, the person M in the target area X to be dazzled can be dazzled by adjusting the opening / closing degree of the blind 1 according to the external environment (external illuminance). Without giving, there is an advantage that the amount of sunlight introduced can be ensured conventionally, energy required for lighting etc. can be reduced, and the feeling of opening is not impaired.
(Embodiment 2)
In the first embodiment, the evaluation index acquisition unit 13 performs the simulation in real time and acquires the evaluation index from the result. In this embodiment, the dazzling feeling that is a reference is previously shown in FIG. An environmental simulation is performed using an environmental simulation device 15 such as a computer to clarify the relationship between the external illuminance and the offset angle θ of the blind 1, and the result is shown in FIG. By storing the current illuminance acquired in the solar radiation state acquisition unit 12 by the evaluation index acquisition unit 13 of the blind icon 11 and the illuminance of the optimum opening / closing degree table TB, when the solar radiation shielding control device is in operation. The optimum offset angle θ is determined, and the controller 1 uses the degree of opening / closing by the offset angle θ. There is different in that the opening and closing of the control of the blind 1, as described above.
Since the system configuration is the same as that shown in FIG. 1, it is not shown here.

  FIG. 11 shows a flowchart of an environmental simulation performed in advance. This environmental simulation is different from the environmental simulation in the first embodiment described above in that the loop of steps S12 to S16 shown in FIG. = 0, 1... 24 × 365) loop included in each step (steps S12 ′ to S16 ′), and the optimal opening / closing degree table 13 calculated in step 17 after step S17 has a dazzling feeling below a reference. The difference is that a process for writing the opening / closing degree, that is, a process for writing the relationship between the external illuminance and the offset angle θ in the optimum opening / closing degree table TB is added. One of the areas corresponding to the installation locations distributed by the observation system <Automated Meteorological Data Acquisition System>) Use one year of hourly weather data.

According to the present embodiment, the calculation result of the evaluation index is provided in advance as a table, so that high-speed processing is possible even if the blind Icontt is configured with an inexpensive arithmetic processing device having a relatively low processing capability.
(Embodiment 3)
In the first and second embodiments, information is exchanged between the respective Iconts 7, 10, 11 and 16 and the floor integrated controller 17 using a transmission line dedicated to building automation. In this embodiment, FIG. In this way, the LAN 18 using Ethernet (registered trademark) is connected, for example, a Web server is mounted on the blind icon 11, and an HTTP (HyperText) is sent from a personal terminal PC composed of a personal computer connected to the LAN 18 or the panel switch device PS. It is possible to access the Web server on the blind icon 11 side provided by the Web server by accessing the Web server using the Transfer Protocol), and change the operating status of the blind icon 11 from the personal terminal PC or the panel switch PS, for example. Making it possible It can also be the user to freely set the glare level.

  In the above-described first to third embodiments, the case where the blind 1 made of the Venetian blind is used has been described. However, the present invention can also be applied to a smart window or other blind that can adjust the degree of opening and closing.

  By the way, by using a device-embedded network technology called EMIT (Embedded Micro Internetworking Technology) (a network technology having a function of easily incorporating middleware into a device and connecting to the network, hereinafter referred to as EMIT technology). Various equipment (illumination equipment, air conditioning equipment, power equipment, sensors) from external terminals (not shown) such as mobile phones, PCs (Personal Computers), PDAs (Personal Digital Assistants), PHSs (Personal Handy phone Systems) Electric locks, Web cameras, etc. are hereinafter referred to as EMIT terminals.) There is a system that can access <not shown> to remotely monitor and control the EMIT terminal.

  Note that the EMIT terminal is a built-in device equipped with a microcomputer, and is a device-embedded middleware for connecting to the network and is equipped with EMIT software that realizes the EMIT technology.

  As a system to which the above-mentioned EMIT technology is applied (hereinafter referred to as an EMIT system), an external terminal remotely monitors and controls an EMIT terminal via a center server (not shown) provided on the Internet. For example, a configuration in which an EMIT terminal is directly accessed from an external terminal equipped with EMIT software to remotely monitor and control the EMIT terminal without using a center server.

  Then, by using the EMIT system, for example, the above-mentioned EMIT terminals are distributed in a building (for detached houses, condominiums, buildings, factories, etc.) <not shown>, and the status of the EMIT terminals is monitored remotely from an external terminal. This makes it possible to perform energy management of the entire building and remote meter reading of gas, water, and electricity in the building.

  Therefore, the above-described solar radiation shielding control apparatus according to the first to third embodiments of the present invention may be configured using the above-described EMIT system.

1 is a schematic configuration diagram of Embodiment 1. FIG. It is a block diagram of blind Icont of Embodiment 1. 3 is a flowchart for explaining the operation of the first embodiment. (A) is calculation explanatory drawing of the solar position used in Embodiment 1, (b) is a related explanatory drawing of the sun and a window surface. It is explanatory drawing of the weather determination used for Embodiment 1. FIG. 3 is a flowchart for determining an optimum opening / closing degree according to the first embodiment. It is explanatory drawing of the opening / closing degree control of the blind of Embodiment 1. FIG. 3 is a flowchart of control using cloudiness determination according to the first embodiment. It is explanatory drawing of the external illumination intensity at the time of the cloudy determination of Embodiment 1, and blind control. It is a block diagram of blind Icont used for Embodiment 2. FIG. 6 is a flowchart of determining an optimum opening / closing degree according to the second embodiment. FIG. 9 is a system configuration diagram of a third embodiment. It is explanatory drawing of a prior art example.

Explanation of symbols

1 Blind 6 Illuminance meter 11 Blind Icont
12 solar radiation state acquisition unit 13 evaluation index acquisition unit 14 control unit

Claims (5)

A solar shading control device for controlling the amount of incident light entering the indoor by providing a shielding means in a daylighting unit for daylighting provided with an illuminating device, and adjusting the degree of opening and closing of the shielding means,
A result of simulating an evaluation index of a feeling of glare in the daylighting unit is acquired based on a solar radiation state acquisition unit that acquires an outdoor solar radiation state, arrangement information of the lighting device, the solar radiation state, and the open / closed degree. A solar radiation shielding control device comprising: an evaluation index acquisition unit; and a control unit that adjusts the degree of opening and closing so that the acquired evaluation index of dazzling feeling is no longer an uncomfortable value. The evaluation index acquisition unit has a data table of the evaluation index calculated by changing the solar radiation state and the opening / closing degree in a state where the lighting device is disposed indoors, and the evaluation index of the solar radiation state and the opening / closing degree The solar shading control device according to claim 1, wherein the solar radiation shielding control device is obtained based on the data table. The shielding means is configured by a Venetian blind, and includes a solar position acquisition means for acquiring a solar position at the time of controlling the amount of incident light, and the evaluation index acquisition unit acquires the evaluation index based on the solar position. The solar radiation shielding control device according to claim 1 or 2. Direct light determination means for determining whether or not to enter the field of view when the daylighting unit is viewed from the indoors based on the sun position and the degree of opening and closing, and the control unit includes the indoor light by the direct light determination means. 4. The solar radiation according to claim 3, wherein when the daylighting part is viewed from the sun, the open / closed degree is controlled so that the sun does not enter the field of view when it is determined that the direct light from the sun enters the field of view. Shielding control device. A weather determination unit that determines whether the sky is clear or cloudy based on the altitude of the sun and the illuminance of the daylighting unit, and the control unit adjusts the open / closed degree to full open when the weather determination unit determines that the weather is cloudy The solar radiation shielding control device according to claim 1, wherein the solar radiation shielding control device is a solar radiation shielding control device.

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