JPH0342633A - Controller for dimming glass - Google Patents

Abstract

PURPOSE:To improve the amenity of the heat environment in a room and the durability of the dimming glass by controlling the light beam transmission quantity of the dimming glass or the selection quantity of transmitted wavelength according to the output of a transmitted light adjustment quantity arithmetic means. CONSTITUTION:The controller is equipped with a 1st comparing means 9 which compares the output of a glass temperature detecting means 6 with a glass temperature set value 8 which is set previously and stored and a 2nd comparing means 11 which compares the output of a heat environmental state detecting means 7 with a room- temperature set value or light quantity set value 10 which is stored. The selection quantity of the dimming glass 1 is controlled according to the output of a transmitted light adjustment quantity arithmetic means 12 which determines the light beam transmission quantity of the dimming glass 1 or the selection quantity of the dimming glass 1 according to the comparison results. Thus, the heat environmental state of glass temperature, room-temperature irradiation light quantity, etc., is detected and the transmissivity of the dimming glass 1 is varied to increase the light beam transmission quantity or transmitted wavelength selection quantity, thereby suppressing a rise in the glass temperature. Consequently, the amenity of persons in a car and the high-temperature durability of the dimming glass are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control device for a light control glass that adjusts the amount of transmitted light, etc., in order to make the thermal environment inside a car comfortable.

BACKGROUND ART Conventionally, infrared absorbing glass, infrared reflecting glass, etc. have been used to make the indoor thermal environment comfortable.

Furthermore, in recent years, light control glass that can adjust the color of the glass has been used for the purpose of adjusting the amount of sunlight entering the room. As shown in FIG. 8, this light control glass 1 has light control films 3 arranged on both sides of an electrolyte 2 such as lithium perchlorate that can adjust the amount of transmission depending on the amount of electric field, and a transparent conductive film 4 on the outside thereof. The transparent conductive film 4 is sandwiched between glasses 5 on both sides. Then, a voltage is applied between both transparent conductive films 4, and this electric field enters the light control film 3 from the transparent conductive film M4, and at this time, color is generated.

By using the light control glass I, it is possible to continuously adjust the amount of sunlight entering the room, so it is possible to obtain a comfortable amount of light for people in the room. Therefore,
When this light control glass is applied to the window glass of an automobile, it is possible to significantly improve the thermal environment inside the automobile, where the heat load due to the amount of solar radiation is extremely severe compared to the residential environment.

This effect can be achieved with infrared-absorbing and infrared-reflecting glasses that have been used for a long time, but changing the color can change the psychological state of the occupants. It is known that adjusting the color to be particularly dark not only increases the psychological stability of the occupants and improves air conditioning comfort, but also has a positive effect on driving operations.

Problems to be Solved by the Invention However, in general, when a voltage is applied to the light control glass, the color changes to deep blue or deep brown, so the temperature of the light control glass itself increases when exposed to high amounts of solar radiation. There is a point.

In other words, not only does light control glass have some problems with reaction at high temperatures because it causes a coloring effect through a chemical reaction, but it also causes irreversible changes in the electric field film and light control film at high temperatures, making light control difficult. There is a possibility that the optical operation will not be performed.

The present invention was made in view of these conventional problems, and its purpose is to provide a lighting system that improves both the comfort of the indoor thermal environment and the durability of light control glass. The present invention aims to provide a control device for optical glass.

Means for Solving the Problems Therefore, the present invention, as shown in FIG. A glass temperature detection means 6 for detecting the temperature of the optical glass I, a thermal environment state detection means 7 for detecting the indoor or outdoor temperature or the amount of light such as the amount of sunlight, and the outputs of the glass temperature detection means 6 are set in advance. A first comparison means 9 compares the output of the thermal environment state detection means 7 with a stored glass temperature set value 8, and a second comparison means compares the output of the thermal environment state detection means 7 with a preset and stored room temperature set value or light amount set value 10. means II, and a transmitted light adjustment amount calculating means 12 for determining the amount of light transmitted through the light control glass 1 or the selected amount of transmitted wavelength based on the comparison results of the first comparing means 9 and the second comparing means 1; , and a control means I3 for controlling the amount of light transmitted through the light control glass 1 or the selected amount of the transmitted wavelength based on the output of the transmitted light adjustment amount calculation means 12.

It detects the thermal environment conditions such as the working glass temperature and the amount of light irradiated at room temperature, and changes the transmittance of the light control glass to increase the amount of light transmitted or the amount of transmitted wavelength selection, while ensuring that the occupants do not feel uncomfortable. to suppress the rise in glass temperature.

This improves passenger comfort and the high-temperature durability of the light control glass.
You can do the second thing.

EXAMPLES Hereinafter, the present invention will be explained based on the drawings. FIG. 2 is a diagram showing a first embodiment of the present invention.

First, the configuration will be explained. Reference numeral 1 denotes a light control glass used in an automobile window, 6 a glass temperature detection sensor, 14 a room temperature sensor, 15 a controller, which is a glass temperature sensor 6 which is a glass temperature detection means, and a room temperature sensor 14 which is a thermal environment state detection means. The transmittance of the light control glass 1 is controlled based on the signal from the light control glass 1.

Then, the controller 15, as shown in FIG.
a first comparing means 9 for comparing the output of the glass temperature detecting means 6 with a previously set and stored glass temperature set value 8 which is a limit value at which the light control glass 1 will not be destroyed by high temperature; and a thermal environment state detecting means Room temperature sensor 14 selected as an example of 7
The output of
a second comparison means 11 for comparing the first comparison means 9 with the first comparison means 9;
Transmitted light adjustment amount calculation means 12 which determines the amount of light transmitted through the light control glass 1 or the selection amount of the transmitted wavelength based on the comparison result of the second comparison means 11; and the transmitted light adjustment amount calculation means 1
2, and a control means 13 for controlling the amount of light transmitted through the light control glass I or the selected amount of the transmitted wavelength based on the output of the light control glass I.

Next, the effect will be explained. Figure 3 shows an example of the probability of breakage of light control glass as a function of its surface temperature. The temperature of the light control glass itself increases.In the case of the light control glass shown in Figure 3, it operates normally up to around +00°C, but at higher temperatures the electrolyte and light control This causes an irreversible change in the film, making it no longer possible to control light.

For this purpose, the glass surface temperature is detected by the glass altitude detection means (sensor) 6, and a preset glass salinity setting value of, for example, about 80°C that will not cause high-temperature destruction of the light control glass 1 and the detection glass By comparing the temperatures and increasing the transmittance of the light control glass when the glass temperature is higher than the set value, the glass temperature can be lowered and high temperature damage to the light control glass can be prevented.

In addition, since increasing the transmittance causes the room temperature to rise, the room temperature is detected in the next control cycle, and when the temperature is higher than the preset temperature 10, the transmittance of the light control glass 1 is lowered to reduce the heat load due to solar radiation. Maintain passenger comfort.

The control operation of the light control glass 1 will be explained with reference to the control flow diagram in FIG. In addition, (] Oo ), (■o D.

... indicates the number of the processing procedure.

First, turn on the power (not shown) and start the device (1
00). Note that it is also possible to configure the device to automatically start operating when the glass temperature reaches a predetermined temperature.

In step (+01), a room temperature setting value (not the automatic air conditioner setting room temperature, but the control temperature of the light control glass) and the glass temperature setting value are set as initial values.

At step (+02), the room temperature sensor 14 is used as data.
The room temperature is detected by the glass temperature sensor 6, and the glass temperature of the light control glass is detected and input by the glass temperature sensor 6.

In step (103), the glass temperature and the glass temperature set value 8 are compared by the first comparison means 9.

If the glass temperature is higher than the glass temperature set value 8, the process goes to step (105) in order to prevent the glass temperature from becoming high and causing high temperature destruction.

If the glass temperature becomes higher than the glass temperature set value 8, the process proceeds to the next step (104).

In step (+04), the room temperature is compared with the room temperature set value ]0. If the room temperature is lower than the room temperature set value 10, step (10) is performed to increase the transmitted light and raise the room temperature.
Go to 5). If the room temperature is not lower than the room temperature set value 10, go to step (+06).

In step (105), the transmittance of the light control glass 1 is set to be large. In this embodiment, the maximum transmittance is, for example, 85
Set to %.

That is, in order to check the temperature of the light control glass 1 and prevent it from reaching a certain temperature and causing high-temperature damage, the transmittance of the glass is maximized before high-temperature damage occurs. Prevents the glass itself from overheating. Furthermore, when the room temperature is low, (j1 transmittance is maximized, transmitted light is increased, and the room temperature is raised.

In step (], 06), the transmittance of the light control glass 1 is changed depending on the room temperature. That is, when the room temperature is high, the transmittance is lowered to reduce the heat load due to solar radiation. Note that the reason why the transmittance of the windshield is not reduced below 70% is to ensure visibility for driving.

Once the above steps are completed, step (102)
Go back and repeat the loop.

FIG. 5 shows the change in the breakage probability of the light control glass when the amount of solar radiation is applied.

Conventionally, when the amount of solar radiation was 500 to 600 kcal/m'h, the probability of failure was around 50%, but according to this example, the probability of failure was around 50%.
It can be seen that it is destroyed at 50 to 900 kcal/m'h.

Summer solar radiation in Japan is at most 700kcal/
Taking into consideration the fact that it is approximately m2h and is not continuous, it can be seen that the risk of high-temperature destruction of the light control glass is extremely low according to the present invention.

FIG. 6 shows a control flow diagram of a second embodiment of the present invention. In this embodiment, an occupant detection device (not shown) is installed to determine whether or not an occupant is present in the vehicle interior, and when the presence of an occupant is detected from this output signal, the
Increase the transmittance of the light control glass (maximum value of 85% in the example)
In this case, it was decided that no control would be performed, so as not to reduce the decisiveness of the occupants.

The occupant detection device uses a method that detects the weight on the top of each seat or a contact switch inside the seat, and uses this signal to determine that an occupant is seated if the weight is less than a predetermined weight. There are things etc.

Next, the control operation will be explained according to the diagram. Note that most of the control in this embodiment is the same as the control in the first embodiment described above, so the same control procedure as that in the first embodiment includes the control procedure in the fourth embodiment, which is the control flow diagram of the first embodiment. The same reference numerals as those in the figure are given, and the explanation thereof will be omitted.

At step (+03), the temperature of the light control glass 1 is detected by the glass temperature detection sensor 6, and if the glass temperature is higher than the glass temperature set value 8, the process proceeds to step (201).

In step (201), the presence of an occupant is determined, and if the occupant is present, the process proceeds to step (104), and the transmittance of the light control glass 1 is increased only when the room temperature is lower than the room temperature set value (104). , (+05). If no occupant is present, the process goes to step (105) and the transmittance of the light control glass is controlled to the maximum (105).

According to this embodiment, as in the first embodiment, breakage of the light control glass is prevented and the determinability of the - layer occupant is maintained.

FIG. 7 shows a control flow diagram of a third embodiment of the present invention. This embodiment determines whether the target car is parked or not, and if it is, increases the transmittance of the light control glass.
In the embodiment, the maximum value is set.

In this embodiment, in order not to impair the comfort of the occupants, the glass transmittance is maximized only when the occupant is parked, when it is assumed that the occupants will not be in the vehicle interior for a long time, and the temperature of the glass is likely to rise. It is.

The control operation of this embodiment will be explained below with reference to the drawings.

Also in this embodiment, since most of the control operations are the same as those in the first embodiment, the same steps are given the same reference numerals and the explanation thereof will be omitted.

In step (301), a room temperature set value, a glass temperature set value, a vehicle speed set value, and an integrated time set value are set as initial values.

In step (302), the glass temperature, room temperature, and vehicle speed are inputted as data by the glass temperature detection sensor 6, room temperature sensor 14, and vehicle speed sensor (not shown), respectively.

In step (303), the vehicle speed is compared with the set vehicle speed.

Here, the set vehicle speed is, for example, 1 km/hr. If the vehicle speed is below the set vehicle speed, the process goes to step (304) and the time during which the vehicle speed is below the set vehicle speed is integrated. However, if the vehicle speed exceeds the set speed in the next step of the cycle, this cumulative time is returned to zero. Also, if the vehicle speed is higher than the set speed, step (103)
), the glass temperature is compared with the glass set value, and if the glass temperature is higher than the set value, the process goes to step (305).

In step (305), the cumulative time is compared with a set cumulative time, for example, 15 minutes. If it is less than the set cumulative time, it is determined that the vehicle has not entered the parking state yet, and the process goes to step 2 (104). On the other hand, if the set cumulative time is exceeded, the process goes to step (105), and the transmittance of the light control glass is increased, and in this embodiment, the maximum transmittance setting value is set to 85%.

In the above description, the room temperature is selected as the characteristic value representing the thermal environment state, and the transmittance of the light control glass is controlled depending on the level of the room temperature, but this may be set to other thermal environment quantities such as the outside temperature.

In addition, it can be applied not only to the front and rear glass (but also to the side glass).

Furthermore, rather than dimming the entire surface of a sheet of glass at the same rate, it may be possible to dim only a portion of the glass, or the proportion of dimming may be controlled depending on the position as necessary. Good too.

Furthermore, instead of preventing high-temperature breakdown based only on the temperature of the glass, more effective control can be achieved by using a method that simultaneously detects the amount of light such as the amount of solar radiation, as seen in Figure 5. becomes.

Since the invention is constructed as described in detail, the invention can simultaneously improve both the comfort of the indoor thermal environment and the durability of the light control glass.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of the present invention, FIG. 2 is a partial side sectional view schematically showing the first embodiment of the present invention, and FIG. 3 is a diagram showing the high temperature breakdown rate of light control glass. FIG. 4 is a flow diagram showing the control operation of the first embodiment, FIG. FIG. 7 is a flowchart showing the control operation of the third embodiment of the present invention, and FIG. 8 is a sectional view showing the structure of the light control glass. ■ - Light control glass, 2... Electrolyte, 3... Light control film, 4
Transparent conductive film, 5. Glass, 6 Glass temperature detection means, 7
- Thermal environment state detection means, 8... Glazier degree setting value, 9
first comparison means, IO... room temperature set value or light amount set value;
DESCRIPTION OF SYMBOLS 11...2nd comparison means, 12. Transmitted light adjustment amount calculation means, 13. Control means, 14.. Room temperature sensor, 15. Controller. 5 Rattan g I Mash I

Claims (1)

[Claims] (1) A light control glass that blocks indoors and outdoors and is capable of adjusting the transmission amount or transmission wavelength of light, a glass temperature detection means for detecting the temperature of the light control glass, and the temperature of the room or the outdoors. or a thermal environment state detection means for detecting the amount of light such as the amount of solar radiation; a first comparison means for comparing the output of the glass temperature detection means with a predetermined glass temperature setting value; a second comparing means for comparing with a predetermined room temperature set value or light amount set value;
Transmitted light adjustment amount calculation means for determining the amount of light transmitted through the light control glass or the selected amount of transmitted wavelength based on the comparison results of the first comparison means and the second comparison means; A control device for a light control glass, comprising a control means for controlling an amount of light transmitted through the light control glass or a selection amount of a transmitted wavelength based on the output.