JP3564085B2 - Anti-fog evaluation equipment - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus for evaluating the anti-fog performance of a mirror or glass.
[0002]
Problems to be solved by the prior art and the invention
Conventionally, the evaluation of the anti-fog property of a mirror or glass has been performed by placing an object, which is the mirror or glass whose surface temperature is equal to or lower than the dew point temperature, in an atmosphere, and forming dew condensation on the surface of the object. This was done by measuring the amount of dew and the area of dew. However, in the evaluation of the anti-fogging property by the above method, since the surface temperature of the object placed in a certain atmosphere shifts with time to the atmosphere temperature, it is necessary to accurately measure the amount of dew condensation. It made it difficult. In particular, when the heat capacity of the object is small, the temporal change of the surface temperature of the object to the ambient temperature occurs earlier, and it is particularly difficult to accurately measure the amount of dew condensation. In addition, when performing the evaluation of anti-fog properties by the above method by measuring the size of the dew area, it is apt to adopt an evaluation method that relies on a visual image, which causes adverse effects such as a variation in evaluation by measurement personnel. Is what happens.
[0003]
In view of the above, the present invention has been made in view of the above points, and has an antifogging method that can stably evaluate the antifogging property of an object irrespective of the type of the object such as a mirror or glass. It is an object to provide a sex evaluation device.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, an anti-fogging evaluation apparatus according to claim 1 of the present invention comprises a temperature maintaining means for maintaining an object 2 such as a mirror or glass disposed in an evaluation chamber 1 at a dew point temperature or lower; A condition setting means for changing the condition of the atmosphere in the evaluation chamber; and an evaluation means for evaluating whether or not the object is dewed by the atmosphere in the evaluation chamber. When the object 2 in the evaluation room 1 is viewed from the window 4 provided on the peripheral wall, the object 3 is disposed at a position inside the evaluation room 1 such that the object 3 is reflected and reflected on the surface of the object 2. Means for evaluating anti-fogging property based on a projection image of the object 3 reflected on the surface of the object 2 when the inside of the evaluation room 1 is viewed from the window 4 of the evaluation room 1 to.
Thereby, the temperature maintaining means can maintain the object 2 such as a mirror or glass at the dew point temperature or lower, that is, can maintain the surface temperature of the object 2 at the dew point temperature or lower. It is possible to prevent the temperature from being shifted to the ambient temperature of 1 with time, and to stably evaluate the anti-fogging property of the object 2 irrespective of the type of the object 2. . Further, the anti-fogging property of the object 2 can be evaluated based on the projection image of the object 3 reflected on the surface of the object 2, and the stability of the evaluation of the anti-fog property of the object 2 can be improved. . When the object 2 is made of glass, a thin plate-shaped mirror 17 is arranged behind the object 2 so that when the object 2 is viewed from the window 4 of the evaluation room 1, the projection of the object 3 is projected. Can be superimposed on the object 2 so that the anti-fogging property of the object 2 can be evaluated as in the case where the object 2 is a mirror.
[0006]
Further, the anti-fog evaluation apparatus according to claim 2 is characterized in that, in claim 1 , a grid in which a plurality of column lines and row lines are drawn so as to be orthogonal to each other is used as the subject 3. According to this, when evaluating the anti-fogging property of the object based on the size of the dew area, the size of the dew area can be quantitatively determined by the grid, and the anti-fogging property of the object 2 can be determined. Can improve the stability of the evaluation.
[0007]
Further, anti-fogging property evaluation apparatus according to claim 3 resides in that in Claim 1, as a condition setting means, characterized by comprising a humidifying spray 9 into evaluation chamber 1. According to this, when the humidifying spray 9 is provided in the evaluation room 1, the atmosphere of the evaluation room 1 can be made a high humidity atmosphere close to the bathroom, and conforms to the use form of the object 2 installed in the bathroom. The anti-fogging property of the object 2 can be evaluated.
[0008]
Further, the antifogging property evaluation device according to claim 4 is characterized in that, in claim 1, the window 4 is made of anti-fog glass . According to this, even when the evaluation room 1 becomes hot and humid, dew condensation does not occur in the window 4 made of anti-fog glass, so that the inside of the evaluation room 1 can be reliably observed from the outside via the window 4. You can do it.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.
[0010]
1 to 7 show examples of the embodiment of the present invention. As shown in FIG. 1, the anti-fog evaluation device has a room-shaped evaluation room 1 in which the inside is a closed space, and an object 2 such as a mirror or glass arranged in the evaluation room 1 is kept at a dew point temperature or lower. Temperature maintaining means, condition setting means for changing the condition of the atmosphere in the evaluation chamber 1, and evaluation means for evaluating whether or not the object 2 is dewed by the atmosphere in the evaluation chamber 1. The atmosphere in the evaluation room 1 is changed to high temperature and high humidity by the condition setting means, and dew condensation occurs on the surface of the object 2 such as a mirror or glass placed in the evaluation room 1 due to the atmosphere in the evaluation room 1. And an apparatus for observing and evaluating the dew condensation state on the surface of the object 2, that is, an apparatus for evaluating the anti-fog performance of the object 2.
[0011]
The object 2 arranged in the evaluation room 1 is for positioning at least a part (surface) of the object 2 in the evaluation room 1. For example, even if the entirety of the object 2 is arranged in the space inside the evaluation room 1 as shown in FIG. 3, only a part (surface) of the object 2 is put in the evaluation room 1 as shown in FIG. The object 2 may be arranged so as to face the wall surface of the evaluation room 1 so as to be positioned. In any case, the object 2 is attached to the object mounting base 5 in a replaceable manner. . The object 2 attached to the object mounting base 5 is arranged such that the back surface of the object 2 is entirely in contact with the front surface of the object mounting base 5. The object mounting base 5 is constituted by a housing body having a cavity 6 inside. The object mounting base 5 has a cooling water inlet 7 and a cooling water outlet 8 connected to the cavity 6. Are provided. In other words, the object mounting base 5 has a structure in which cooling water flows into the cavity 6 from the cooling water inlet 7 and flows out of the cavity 6 through the cooling water outlet 8. In addition, 13 in FIG. 2 is a cooling water pipe connected to the cooling water inlet 7, and 14 in FIG. 2 is a cooling water pipe connected to the cooling water outlet 8. The cavity 6 has a larger cross-sectional area than the cooling water inlet 7 and the cooling water outlet 8 so that the flowing cooling water stays therein. This is intended to allow unbiased cooling of the object 2 brought into full contact with 5. As described above, the cooling water is caused to flow in the object mounting base 5 on which the object 2 is mounted, and the object 2 is always cooled by the cooling water. The temperature can always be kept below the dew point temperature, so that the surface temperature of the object 2 can be prevented from shifting to the ambient temperature in the evaluation chamber 1 with time, and the object 2 Thus, the evaluation of the anti-fogging property of the object 2 can be stably performed without being affected by the difference in the object used. The object mounting base 5 into which the cooling water flows has a slight thermal effect not only on the object 2 but also on its surroundings, but as shown in FIG. In the case where the base 5 is located outside the evaluation room 1, the evaluation of the object mounting base 5 is compared with the case where the object mounting base 5 is located inside the evaluation room 1 as in the example of FIG. It is more preferable because it can reduce the thermal effect on the atmosphere in the chamber 1.
[0012]
FIG. 2 shows details of the anti-fogging property evaluation apparatus shown in FIG. 1. In the evaluation room 1, condition setting means for changing the conditions (temperature and humidity) of the atmosphere in the evaluation room 1 is provided. Provided. The condition setting means includes a humidifying spray 9, a heater 10, and a ventilation fan 11. The humidifying spray 9 is connected to the hot water pipe 12 outside the evaluation room 1 and injects hot water into the evaluation room 1 to change the humidity of the atmosphere inside the evaluation room 1. Further, the heater 10 is protruded from the wall surface of the evaluation room 1 into the evaluation room 1 to increase the temperature of the atmosphere in the evaluation room 1. The ventilation fan 11 adjusts the atmosphere in the evaluation room 1 so as to eliminate deviations in the temperature and humidity of the atmosphere in the evaluation room 1. In this example, the humidifying spray 9 is controlled by a control panel 15 interlocked with a hygrometer 24, and the heater 10 is controlled by a control panel 15 interlocked with a thermometer 25. Therefore, the atmosphere in the evaluation chamber 1 can be changed to an atmosphere under predetermined conditions by the control of the control panel 15. A window 4 made of anti-fog glass is arranged on a wall of the peripheral wall of the evaluation room 1 facing the surface of the object 2 so that the inside of the evaluation room 1 can be observed from the outside. I have. As the anti-fog glass, a multi-layer glass in which a heater is embedded or a conductive glass that generates heat when the glass itself is used as an electric resistor and electricity flows through the glass is used. In the figure, reference numeral 16 denotes a lighting device for illuminating the inside of the evaluation room 1. The illuminating device 16 is composed of an incandescent lamp or a mercury lamp, and is arranged at a position where the object 3 and the object 2 arranged in the evaluation room 1 can be illuminated, in this example, at a ceiling portion.
[0013]
The anti-fogging property evaluation device having the above configuration measures and evaluates the anti-fogging property of the object 2 placed in the evaluation room 1. The painted object 3 is arranged, and when the inside of the evaluation room 1 is viewed from the window 4 of the evaluation room 1, anti-fog is performed by the evaluation means based on a projection image of the object 3 reflected on the surface of the object 2. It is to evaluate gender. In other words, when the surface of the object 2 is condensed, the surface of the object 2 is clouded white due to fine water droplets attached to the surface of the object 2. The projected image of the object 3 is hardly reflected, and the presence or absence of dew condensation on the surface of the object 2 is confirmed based on the degree of visibility of the projected image of the object 3 reflected on the surface of the object 2. Here, the object 3 placed in the evaluation room 1 is such that the object 3 is reflected and reflected on the surface of the object 2 when the object 2 is viewed from the window 4 of the evaluation room 1. It is arranged at an internal position. When the object 2 is made of glass, as shown in FIG. 5, a thin plate-shaped mirror 17 is arranged behind the object 2, that is, between the object 2 and the object mounting base 5. When the target 2 is viewed from the window 4 of the evaluation room 1 by the mirror 17, the projection of the target 3 can be made to overlap the target 2 so that the target 2 can be seen as a mirror. The anti-fogging property of the object 2 can be evaluated without any change.
[0014]
Further, in this example, an image pickup means such as a CCD camera 18 is arranged outside the window 4 of the evaluation room 1, and as shown in FIG. The dew condensation state on the surface of the object 2 is determined by comparing and analyzing the sample data stored in advance with the data storage unit 19 and the determination unit 20 which constitutes an evaluation unit together with the data storage unit 19. The evaluation result of the evaluation means is output by output means such as the display unit 21 and the print output unit 22 of the computer.
[0015]
As a method for evaluating the anti-fogging property of the object 2, there is a method of measuring the size of the dew condensation area on the surface of the object 2, and the object 3 in this case is, for example, as shown in FIG. A character in which a plurality of characters are arranged at equal intervals in the vertical and horizontal directions on the surface of the board, or a vertical stripe pattern in which vertical lines are positioned at equal intervals on the surface of the board as shown in FIG. Or, a figure or a character drawn at random on the surface of the board as shown in FIG. 6C, or a plurality of column lines and row lines orthogonal to the surface of the board as shown in FIG. 6D. It is preferable to use the one in which the cells are drawn in such a manner as described above, or the one in which numbers are written in the upper and vertical columns of the cells as shown in FIG. In particular, in the case of using a board drawn on the board of FIGS. 6D and 6E as the object 3, the area where dew condensation occurs on the surface of the object 2 and the size of the dew area are counted. Thus, the stability of the evaluation of the anti-fogging property of the object 2 can be improved. In other words, when this mesh is used as the object 3, the image obtained by the CCD camera 18 can be easily converted into numerical data by image analysis. Numerical data can also be used, so that the capacity of the data storage unit 19 can be reduced.
[0016]
It is also preferable to use a board having a black surface as shown in FIG. 6F for the object 3, whereby a black projection of the object 3 can be projected on the surface of the object 2. It is also capable of prominently expressing a white cloudy shade due to condensation on the surface of No. 2. Generally, the greater the hydrophilicity of the surface of the object 2, the stronger the anti-fog property. In other words, when the hydrophilicity of the surface of the object 2 is very large, even if the surface of the object 2 is below the dew point, the condensed water spreads thinly on the surface of the object 2 so that the condensed water does not become water droplets. On the other hand, the surface of the object 2 is not fogged by dew. On the other hand, as the hydrophilicity of the surface of the object 2 is smaller, fine water droplets are more likely to be densely attached to the surface of the object 2 due to dew condensation. The white haze is clearly formed on the surface of the object 2. Therefore, measuring the density of whiteness due to dew condensation on the surface of the object 2 using the object 3 whose surface is a black board is not only the anti-fog property of the object 2 but also the surface of the object 2 The degree of hydrophilicity can also be evaluated.
[0017]
Note that the evaluation means in this example is performed using the CCD camera 18, but a measuring person is arranged instead of the CCD camera 18 and the dew state on the surface of the object 2 is visually checked by the measuring person. In this case as well, the image of the surface of the object (visual recognition state) obtained by visual observation of the measurer is compared and analyzed with sample data stored in advance constituting the evaluation means, and the object is measured. The anti-fogging property of No. 2 was evaluated.
[0018]
Hereinafter, other examples of the embodiment of the present invention will be listed. Since these are partially modified examples of the above-described embodiment, overlapping parts will not be described, and only the changed points will be described.
[0019]
Another example of the embodiment shown in FIG. 8 is that a shower 26 is further added as a condition setting means provided in the evaluation room, and the above-mentioned shower 26 is provided on the object 2 in which the hot water injected from the shower 26 is arranged in the evaluation room 1. This is an example where it is arranged at a position where it can be applied to the surface. Generally, the surface of a mirror or glass placed in a bathroom is easily fogged, and if the surface of the mirror or glass becomes cloudy, hot water from a hot shower is applied to the mirror or glass to temporarily remove the mirror or glass. The fogging generated on the surface is removed. In this example, the hot water jetted from the shower 26 can be applied to the surface of the mirror or glass object 2 to remove the fog from the surface of the object 2. In addition, after the fogging is removed from the surface of the object 2 by applying warm water from the shower 26 to the surface of the object 2, the anti-fogging property of the object 2 can be evaluated. That is, the evaluation room can be made closer to the bathroom, and the anti-fogging property of the object 2 can be evaluated according to the usage of the object 2 installed in the bathroom.
[0021]
【The invention's effect】
As described above, in the anti-fogging property evaluation apparatus according to claim 1 of the present invention, a temperature maintaining means for keeping an object such as a mirror or glass placed in the evaluation room at a dew point temperature or less, Since a condition setting means for changing the condition and an evaluation means for evaluating whether or not the object is dewed by the atmosphere in the evaluation room are provided, the temperature maintaining means sets the object such as a mirror or glass to a dew point temperature or less. In other words, the surface temperature of the object can be maintained below the dew point temperature, and the surface temperature of the object can be prevented from shifting over time to the ambient temperature of the evaluation room. It is intended to stably evaluate the anti-fogging property of the target object without being affected. Further, as the evaluation means, when the object in the evaluation room is viewed from a window provided on the peripheral wall of the evaluation room, the object is reflected at a position inside the evaluation room such that the object is reflected on the surface of the object. Since the means for arranging and evaluating the anti-fog property based on the projected image of the object reflected on the surface of the object when looking inside the evaluation room from the window of the evaluation room was used, In addition to improving the stability of the evaluation of the anti-fog property of the object, if the object is glass, a thin plate mirror can be placed behind the object to view the object from the window of the evaluation room. In such a case, the projected shadow of the object can be made to be superimposed on the object so that the anti-fog property of the object can be evaluated in the same manner as when the object is a mirror.
[0023]
In addition, in the anti-fogging property evaluation device according to claim 2 , in addition to the effect of claim 1 , as the subject, a grid in which a plurality of column lines and row lines are drawn so as to be orthogonal to each other is used. Therefore, when evaluating the anti-fogging property of the object based on the size of the dew area, it is possible to quantitatively determine the size of the dew area by the squares, and to evaluate the anti-fogging property of the object. Stability can be improved.
[0024]
In the antifogging property evaluation device according to the third aspect , in addition to the effect of the first aspect, since the humidifying spray is provided in the evaluation room as the condition setting means, the atmosphere of the evaluation room is close to the bathroom. The humid atmosphere can be set, and the antifogging property of the object can be evaluated in accordance with the usage of the object installed in the bathroom.
[0025]
Further, in the antifogging property evaluation device according to claim 4 , in addition to the effect of claim 1, since the window is made of anti-fog glass, the anti-fog glass is used even if the evaluation room becomes hot and humid. Since the dew condensation does not occur in the constructed window, the inside of the evaluation room can be reliably observed from the outside through the window. [Brief description of drawings]
FIG. 1 is a schematic side view of an example of an embodiment of the present invention.
FIG. 2 is a side view of the same.
FIG. 3 is a schematic side view showing a state where the whole object is placed in an evaluation room.
FIG. 4 is a schematic side view showing a state in which a part (surface) of the above-mentioned object is placed in an evaluation room.
FIG. 5 is a schematic side view showing a state where the glass is attached to an object mounting base as an object.
FIGS. 6A to 6F are plan views showing examples of the same subject.
FIG. 7 is a control block diagram showing an evaluation unit according to the third embodiment.
FIG. 8 is a schematic side view showing another example of the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Evaluation room 2 Object 3 Object 4 Window 5 Object mounting base 6 Cavity 7 Cooling water inlet 8 Cooling water outlet 9 Humidifier spray 10 Heater

Claims (4)

Temperature maintaining means for keeping an object such as a mirror or glass placed in the evaluation room below the dew point temperature, condition setting means for changing the condition of the atmosphere in the evaluation room, and whether or not the object forms dew due to the atmosphere in the evaluation room Evaluation means for evaluating the state of the object, wherein the evaluation means is such that when the object in the evaluation room is viewed from the window provided on the peripheral wall of the evaluation room, the object is reflected on the surface of the object. Means for arranging an object at a position inside the room and evaluating anti-fog properties based on a projection image of the object reflected on the surface of the object when looking inside the evaluation room from the window of the evaluation room An anti-fogging property evaluation device characterized by using: 2. The anti-fogging evaluation apparatus according to claim 1, wherein a grid in which a plurality of column lines and row lines are drawn orthogonally is used as the subject . The antifogging evaluation apparatus according to claim 1, wherein a humidifying spray is provided in the evaluation chamber as the condition setting means . 2. The anti-fogging evaluation apparatus according to claim 1, wherein said window is made of anti-fog glass .

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