The Effect of Sky Blue Wall Light on People’s Coolness in Summer

The Effect of Sky Blue Wall Light on People’s Coolness in Summer

Yuka KAWAI^**, Mitsunori MIKI^*, Sho OKADA^** , Yuya MAEDA^**

(Received April 19, 2019)

We have been examining how the color temperature of the ceiling light affects people’s cool feeling. As a result of the verification, it was found that the color and brightness of the ceiling light influenced the sense of coolness of people. This is assumed that the in-view environment changes due to the difference in the color and brightness of the ceiling lighting, so the lighting environment in the field of view influences the sense of coolness of people. However, in a typical room, the brightness and color temperature of the ceiling light cannot often be changed. Therefore, in this study, we will use wall light which can change the brightness and color and clarify the effect of wall light on cool feeling. As a result of subject experiments on cool feeling in two rooms, which are low illuminance (300 lx) and no wall light or with light blue wall light, a sense of coolness of the room with no wall light and with light blue wall light was about the same. From this result, it was found that when the ceiling light is low of illuminance, the light blue wall light exerts an influence of about 2ˆon the human coolness.

Key words : wall light, room tempreture, a sense of coolness, in-view environment Ωʔϫʔυ: น໘র໌ɼࣨԹɼྋஆײɼࢹ໺಺؀ڥ

Նقʹ͓͍ͯਫ৭ͷน໘র໌͕ਓͷྋஆײʹ༩͑ΔӨڹ

઒߹ ༝Ն, ࡾ໦ ޫൣ, Ԭా ঵, લా ါ࠸

1. ͸͡Ίʹ

ۙ೥ɼࣨ಺؀ڥΛվળ͢Δ͜ͱΛ໨ඪʹɼ༷ʑͳݚڀ

͕ߦΘΕ͍ͯΔɽԹ౓ʹؔ͢Δݚڀͱͯ͠ɼ੢ݪΒ͸

࡞༻Թ౓͕೤తதཱঢ়ଶΑΓߴԹʹͳΔ͜ͱʹΑΓർ

࿑ʹର͢Δ֮ࣗ঱ঢ়͕ߴ͘ͳΔ͜ͱΛࣔͨ͠¹⁾ɽ৭ͱ Թ౓ʹؔ͢Δݚڀͱͯ͠ɼদݪΒ͸ᒵ৭ͱਫ৭ͷΧʔ ςϯͷԹྫྷײ΍פॵɼྋஆ΁ͷҹ৅ʹ༩͑ΔӨڹΛݕ

ূͨ͠ɽͦͷ݁ՌɼԹ೤؀ڥ৚͕݅ෆշͳ৔߹ʹɼߴ Թͷ෦԰Ͱ͸פ৭ͷΧʔςϯΛݟΔͱྋ͘͠ɼ௿Թͷ ෦԰Ͱ͸ஆ৭ͷΧʔςϯΛݟΔͱஆ͔͘ͳͬͨ͜ͱΛ

ใࠂ͍ͯ͠Δ²⁾ɽ·ͨɼ༗ޫΒ͸੺৭Ͱ఺౮ͨ͠র໌

ԼͰ+0.85ˆɼ੨৭Ͱ఺౮ͨ͠র໌ԼͰ-0.95ˆମײ Թ౓͕มԽͨ͠ͱใࠂ͍ͯ͠Δ³⁾ɽ

ੴҪΒ͸ɼর໌ͷ໌Δ͞΍৭͕ਓͷײ͡Δॵ͞΍פ

͞ʹ༩͑ΔӨڹΛݕূ͢ΔͨΊɼ࣮ݧΛߦͬͨ⁴⁾ɽͦ

ͷ݁Ռͱͯ͠ɼর౓ʹؔͯ͠͸ص্໘র౓͕௿͍΄Ͳ ྋ͘͠ɼߴ͍΄Ͳஆ͔͘ͳΔ͜ͱΛ͍ࣔͯ͠Δɽ৭Թ

౓ʹؔͯ͠͸ɼஆ৭Ͱ͋Δ௿৭Թ౓΄Ͳஆ͔͘ɼפ৭ Ͱ͋Δߴ৭Թ౓΄Ͳྋ͍͠ͱ͍͏݁ՌΛใࠂ͍ͯ͠

Δ. ͜ͷ͜ͱ͔Βɼর໌ͷর౓ɼ৭Թ౓ͷҧ͍ʹΑΔ

* Faculty of Science and Engineering, Doshisha University, Kyoto

Telephone:+81-774-65-6930, Fax:+81-774-65-6716, E-mail:[email protected]

** Graduate School of Science and Engineering, Doshisha University, Kyoto

Telephone:+81-90-4214-9852, Fax:+81-790-45-0043, E-mail:[email protected]

ࢹ໺಺ͷ؀ڥͷมԽ͸ਓͷྋஆײʹӨڹΛ༩͑Δͱߟ

͑ΒΕΔɽ·ͨɼ৭ʹΑͬͯਓͷྋஆײ͕มԽ͢Δݱ

৅ͱͯ͠ɼBennett & Rey͸੺Λओମͱͨ͠؀ڥͰ͸

ਓ͸ஆ͔͘ײ͡ΒΕɼ੨Λओମͱͨ͠؀ڥͰ͸ྋ͘͠

ײ͡Δhue-heatԾઆΛఏএͨ͠⁵⁾ɽੴҪΒͷݚڀ͸

hue-heatԾઆͷݕূʹ΋ͳ͍ͬͯΔɽ

͔͠͠ɼҰൠతͳࣨ಺Ͱ͸ɼఱҪর໌͸Ұఆͷ໌Δ

͞ɼ৭Թ౓Ͱ఺౮͓ͯ͠Γɼ໌Δ͞ɼ৭Թ౓ΛมߋͰ

͖ͳ͍͜ͱ͕ଟ͍ɽҰํɼর໌Λน໘ʹ޲͚ͯ఺౮͢

Δน໘র໌͸น໘ͷ৭Λม͑Δ͜ͱͰɼࢹ໺಺ͷর໌

؀ڥΛมߋͰ͖Δɽ͜ͷ͜ͱ͔ΒɼఱҪর໌ͷ໌Δ͞ɼ ৭Թ౓Λมߋ͢Δ୅ΘΓʹɼน໘র໌ʹΑͬͯࢹ໺಺

ͷর໌؀ڥΛมߋͤ͞Δ͜ͱͰɼઌߦݚڀΑΓਓͷྋ ஆײΛม͑Δ͜ͱ͕Մೳͩͱߟ͑ΒΕΔɽ͔͠͠ɼน ໘র໌͕ྋஆײʹͲͷఔ౓ӨڹΛٴ΅͔͢ͷݕূ͸͜

Ε·ͰߦΘΕ͍ͯͳ͍ɽΑͬͯɼຊݚڀͰ͸น໘র໌

ʹΑΔࢹ໺಺ͷর໌؀ڥͷҧ͍͕ྋஆײʹͲͷఔ౓ͷ ӨڹΛ༩͑Δ͔ݕূ͢Δɽ

2. น໘র໌

น໘র໌͸น໘ʹ޲͚ͯর໌Λ఺౮͢Δؒ઀র໌ͷ ҰछͰ͋Γɼน໘Λ໌Δ͘͢Δর໌Ͱ͋Δɽน໘র໌

͸ɼௐޫௐ৭ՄೳͳఱҪর໌Λಋೖ͢ΔΑΓ΋ಋೖ͕

༰қͰ͋Δɽน໘র໌ͷҰྫΛFig.1ʹࣔ͢ɽน໘র

໌ͷޫ͸นʹ൓ࣹؒ͠઀తʹಧͨ͘Ίɼਓʹ௚઀ಧ͔

ͳ͍ɽͦͷͨΊɼޫݯͷޫ͕ਓͷ໨ʹ௚઀͸͍Βͣɼ໨

΁ͷܹ͕ࢗগͳ͍ɽ·ͨɼ࡞ۀதͷص্໘র౓ɼ৭Թ

౓ʹ͸ӨڹΛ༩͑ͣʹน໘ͷ৭΍໌Δ͞Λมߋ͠ɼࢹ

໺಺ͷর໌؀ڥΛมߋͰ͖Δͱ͍͏ར఺΋͋ΔɽΑͬ

ͯɼఱҪর໌͕Ұ཯఺౮͍ͯ͠Δ؀ڥʹ͓͍ͯɼน໘ র໌ʹΑͬͯর໌؀ڥΛมߋ͢Δ͜ͱͰɼ࡞ۀʹ͓͚

Δޫ؀ڥΛҰఆʹอͪͳ͕ΒਓͷྋஆײʹӨڹΛ༩͑

Δ͜ͱ͕Ͱ͖Δͱߟ͑ΒΕΔɽ

3. น໘র໌ͱྋஆײʹؔ͢Δ࣮ݧͷ֓ཁ

3.1 ࣮ݧ಺༰

ຊ࣮ݧͰ͸Նقʹ͓͍ͯɼਫ৭Ͱ఺౮͢Δน໘র໌

͕ྋஆײʹ༩͑ΔӨڹΛݕূ͢Δɽ·ͨɼࣨԹ͕ࠩ͋

Δ2෦԰Ͱ࣮ݧΛߦ͍ɼਫ৭ͷน໘র໌ͷ༗ແ͕Ͳͷ

Fig. 1. Wall light.

ఔ౓ͷࣨԹࠩʹ૬౰͢ΔӨڹΛ༩͑Δ͔ݕূ͢Δɽ

3.2 ࣮ݧ߲໨

ຊ࣮ݧͰߦ͏น໘র໌ͱྋஆײʹؔ͢Δ࣮ݧͷ߲໨

ΛҎԼʹࣔ͢ɽ·ͨɼͦͷ࣮ݧͷඃݧऀ਺ΛTable 1 ʹࣔ͢ɽඃݧऀ࣮ݧ͸ɼࢹ֮ʹ࣬ױΛ༗͞ͳ͍େֶੜ Ԇ΂50໊ʹର͠ߦͬͨɽ

ʢaʣ௿র౓ɾಉࣨԹʹ͓͚Δਫ৭ͷน໘র໌ͷӨڹ ݕূ࣮ݧ

ʢbʣ௿র౓ɾࣨԹࠩ1ˆʹ͓͚Δਫ৭ͷน໘র໌ͷ Өڹݕূ࣮ݧ

ʢcʣ௿র౓ɾࣨԹࠩ2ˆʹ͓͚Δਫ৭ͷน໘র໌ͷ Өڹݕূ࣮ݧ

ʢdʣ௿র౓ɾࣨԹࠩ3ˆʹ͓͚Δਫ৭ͷน໘র໌ͷ Өڹݕূ࣮ݧ

Table 1. Experimental items and number of subjects.

Experimental item Male Female ʢaʣ 6 6 ʢbʣ 6 6 ʢcʣ 6 5 ʢdʣ 2 3

3.3 ࣮ݧ؀ڥͱ࣮ݧ৚݅

Fig.2ʹ࣮ݧ؀ڥਤΛࣔ͢ɽ࣮ݧ͸ɼ͚͍͸ΜͳΦʔ

ϓϯΠϊϕʔγϣϯηϯλʔ಺ͷϝλίϯϑΥʔτɾ ϥϘͰߦͬͨɽԹ࣪౓੍ޚʹ͸᫔ࣹۭௐΛ༻͍ͨɽҰ ൠతʹ༻͍ΒΕΔۭௐ͸ɼۭؾͦͷ΋ͷΛྫྷ٫ɼՃ೤

ͯ͠॥؀ͤ͞Δରྲྀۭௐ͕ओྲྀͰ͋Δɽ͔͠͠ɼରྲྀ

ۭௐͰ͸ɼচԼͱਧग़ޱͰࣨԹ͕ࠩੜ͡ɼԹ౓ΉΒ͕

ى͖Δ໰୊͕͋ΔɽҰํɼ᫔ࣹۭௐ͸᫔ࣹ೤ͷҠಈʹ

ΑΓ෦԰શମͷԹ౓Λௐ੔͢ΔɽͦͷͨΊɼ᫔ࣹۭௐ

͸ରྲྀۭௐͱ͸ҟͳΓɼԹ౓ΉΒ͕ੜ͡ʹ͍͘ɽ

Fig. 2. Experimental environment chart.

࣮ݧࣨ1ͱ࣮ݧࣨ2ɼ଴ػࣨͷࣨԹ͸ɼԹ౓ޡࠩʶ

0.3ˆɼ࣪౓ޡࠩʶ 0.25%ͷԹ౓ܭʹΑΓܭଌΛߦͬ

ͨɽ࣮ݧࣨ1ͱ࣮ݧࣨ2ͷԹ࣪౓ΛTable 2ʹࣔ͢ɽ

Table 2. Temperature and humidity of room.

Room Tempretureʦˆʧ Humidityʦ%ʧ ʢaʣ- Room1 26.9ʶ 0.19 S.D. 47.5ʶ 0.76 S.D.

ʢaʣ- Room2 26.9ʶ 0.19 S.D. 47.0ʶ 1.64 S.D.

ʢbʣ- Room1 26.0ʶ 0.19 S.D. 49.4ʶ 0.88 S.D.

ʢbʣ- Room2 26.9ʶ 0.19 S.D. 51.2ʶ 3.07 S.D.

ʢcʣ- Room1 25.0ʶ 0.19 S.D. 48.3ʶ 1.00 S.D.

ʢcʣ- Room2 26.9ʶ 0.19 S.D. 46.3ʶ 0.73 S.D.

ʢdʣ- Room1 23.8ʶ 0.19 S.D. 50.0ʶ 0.90 S.D.

ʢdʣ- Room2 27.1ʶ 0.19 S.D. 44.9ʶ 1.16 S.D.

ఱҪর໌͸ɼর౓ɾ৭Թ౓ΛมߋՄೳͳύφιχο Ϋ੡LEDΛ༻͍ͨɽর౓ͱ͸෺ମͷද໘ΛরΒ͢ޫ

ͷ໌Δ͞Λࣔ͢΋ͷͰ͋Γɼ୯Ґ͸lxʢϧΫεʣΛ༻

͍Δɽ৭Թ౓͸ɼ͋Δޫݯ͕ൃ͍ͯ͠Δޫͷ৭Λఆྔ

తͳ਺஋Ͱදݱ͢Δई౓Ͱ͋Γɼ୯Ґʹ͸KʢέϧϏ ϯʣΛ༻͍ΔɽఱҪর໌ʹΑΔص্໘র౓͸ɼ௿র౓

৚݅ͱͯ͠ɼσΟεϓϨΠ࡞ۀΛߦ͏ࡍʹे෼ͳর౓

Ͱ͋Δ300 lxͱͨ͠⁶⁾ɽ৭Թ౓͸ҰൠతͳΦϑΟε

র໌Ͱ༻͍ΒΕΔ4500 KͰ࣮ݧΛߦͬͨɽน໘র໌

͸ɼ৭૬ɼ໌Δ͞ɼ࠼౓ΛมߋՄೳͳphilips੡ςʔ ϓܕLEDΛ༻͍ͨɽςʔϓܕLEDΛFig.3ʹࣔ͢ɽ ςʔϓܕLED͸ਫ৭ʢxɼyʣ=ʢ0.1572ɼ0.2024ʣͰ

఺౮ͨ͠ɽ

࣮ݧ࣌ͷ࡞ۀ಺༰ͱͯ͠͸ɼσΟεϓϨΠ࡞ۀΛ૝

ఆ͠ɼిࢠॻ੶ͷ໧ಡͱͨ͠ɽ͜Ε͸ۙ೥ɼࣥ຿ʹ͓

͚ΔσΟεϓϨΠ࡞ۀ͕૿Ճͨͨ͠ΊͰ͋ΔɽσΟε ϓϨΠ࡞ۀ࣌ͷσΟεϓϨΠͷً౓͸നը໘Λج४ͱ

Fig. 3. Tape LED.

ͯ͠100 cd/m²ͱͨ͠ɽ

෰૷ʹؔͯ͠͸ɼҰൠతͳࣨ಺Ͱ͸ɼਓ͸ͦΕͧΕ ҟͳΔ෰૷Λ͍ͯ͠Δ͜ͱ͔Βɼҥྨͷ౷Ұ͸ߦΘͣɼ

ඃݧऀ͕࣮ݧ࣌ʹண༻͍ͯͨ͠ҥྨΛ࣮ݧ࣌ͷ෰૷ͱ

ͯ͠༻͍ͨɽ·ͨɼओ؍ධՁ͸Fig.4ʹࣔ͢ධఆई౓

Λ༻͍ɼྋஆײʹର͢Δ7ஈ֊ධՁΛߦͬͨɽධఆई

౓͸౷ܭղੳΛߦ͏ࡍɼ1͔Β7ͷִؒई౓ͱͯ͠औ Γѻͬͨɽ࣮ݧ͸2018೥8݄18೔͔Β9݄9೔ʹ ߦͬͨɽ

Cool Warm

Neither Slightly

Slightly Considerably

Considerably

Fig. 4. Rating scale.

3.4 ࣮ݧखॱ

ඃݧऀ࣮ݧͷखॱΛҎԼʹࣔ͢ɽ ʢ1ʣ࣮ݧ։࢝

ʢ2ʣԹ౓ॱԠ ʢ3ʣ࣮ݧࣨҠಈ

ʢ4ʣσΟεϓϨΠ࡞ۀʢ20෼ʣ ʢ5ʣྋஆײͷධՁ

ʢ6ʣ߲໨ʢ3ʣʹ໭Δ

·ͣඃݧऀ͸଴ػࣨ಺Ͱ30෼ؒͷԹ౓ॱԠΛߦ͏ɽ 30෼ܦաޙʹඃݧऀ͸࣮ݧࣨʹೖΓɼ20෼ؒσΟε ϓϨΠΛ༻͍ͯిࢠॻ੶Λ໧ಡ͠ɼྋஆײʹର͢Δධ ՁΛ7ஈ֊Ͱߦ͏ɽྋஆײ΁ͷճ౴͸ɼײͨࣨ͡Թͷ Өڹ͚ͩͰͳ͘ɼࢹք͔Βಘͨ৘ใ΋ߟྀ͢Δɽ20෼ ܦաޙɼඃݧऀ͸࣮ݧࣨΛҠಈ͠ɼҠಈ࣮ͨ͠ݧࣨͰ

࠶ͼ20෼଺ࡏ͠ɼྋஆײʹର͢ΔධՁΛߦ͏ɽҎ߱ɼ

ಉ༷ͷ޻ఔΛ܁Γฦ͠ɼܭ4ճͷҠಈͱධՁΛߦ͍࣮

ݧ͸ऴྃ͢ΔɽҎ্ͷ(1)͔Βʢ6ʣ·ͰͷྲྀΕͰɼ3.2 અͰࣔͨ͠ʢaʣ͔ΒʢdʣΛߦ͏ɽ

4. ௿র౓ʹ͓͚Δਫ৭ͷน໘র໌ͷӨڹݕূ࣮ݧ

4.1 ࣮ݧ಺༰

ਫ৭ͷน໘র໌͕ྋஆײʹӨڹΛٴ΅͔͢ͷݕূ͸

͜Ε·ͰʹߦΘΕ͍ͯͳ͍ɽΑͬͯɼ࠷ॳʹਫ৭ͷน ໘র໌͕ྋஆײʹӨڹΛ༩͑Δͷ͔Ͳ͏͔ݕূΛߦ͏

ඞཁ͕͋ΔɽͦͷͨΊɼਫ৭ͷน໘র໌ͷ৭͕ࡍཱͬ

ͯݟ͑Δ௿র౓ʢ300 lxʣͰఱҪর໌Λ఺౮͠ɼਫ৭ͷ น໘র໌͕ྋஆײʹӨڹΛ༩͑Δ͔ݕূ͢Δɽ·ͨɼ ਫ৭ͷน໘র໌͕ྋஆײʹͲͷఔ౓ͷӨڹΛ༩͑Δ͔

ݕূ͢Δɽ࣮ݧ͸ಉࣨԹͰͷ࣮ݧͰ͋ΔʢaʣͱࣨԹࠩ

1ˆͷ࣮ݧͰ͋ΔʢbʣɼࣨԹࠩ2ˆͷ࣮ݧͰ͋Δʢcʣɼ

ࣨԹࠩ3ˆͷ࣮ݧͰ͋Δʢdʣͷ4छྨΛߦ͏ɽ

4.2 ࣮ݧ৚݅

Table 3. Room temperature condition.

Experimental item Room1ʦˆʧ Room2ʦˆʧ

ʢaʣ 27 27

ʢbʣ 26 27

ʢcʣ 25 27

ʢdʣ 24 27

ࣨԹ৚݅ΛTable3ʹࣔ͢ɽ૬ର࣪౓͸શͯͷ෦԰

Ͱ50%ͱͨ͠ɽFig.5ʹʢbʣʹ͓͚ΔࣨԹͷਪҠͷҰ

ྫΛࣔ͢ɽʢbʣͰ͸ɼࣨԹ͕1ˆࠩͱͳΔΑ͏ʹɼۭ

ௐΛ੍ޚͨ͠ɽ·ͨɼFig.5ͷྫʹ͓͚Δɼ࣮ݧࣨ1 ͱ࣮ݧࣨ2ͷࣨԹࠩͷਪҠΛFig.6ʹࣔ͢ɽ

Tempreture

ϙѵϛ

Elapsed timeϙminϛ

Room1 Room2

Fig. 5. Room temperature transitionʢ1ˆ differ- enceʣ.

Temperature difference between room1 and room2ϙѵϛ

Elapsed timeϙminϛ

Fig. 6. Changes in room temperature differenceʢ1 ˆʣ.

র໌৚݅ͱͯ͠ɼص্໘র౓͸300 lxͱ͠ɼ৭Թ౓

͸4500 Kͱͨ͠ɽ࣮ݧࣨ2ͷલ໘ͷนʹਫ৭ͷน໘

র໌Λ఺౮ͨ͠ɽ

4.3 ࣮ݧ݁Ռͱߟ࡯

ʢaʣͷ݁Ռͱͯ͠ɼน໘র໌Λ఺౮͠ͳ͍෦԰ͱ ਫ৭ͷน໘র໌Λ఺౮͢Δ2෦԰ͷྋஆײͷάϥϑΛ

Fig.7ʹࣔ͢ɽ͜ͷྋஆײͷฏۉ͸ɼ֤෦԰Ͱ2ճͣͭ

Fig. 7. A sense of coolness at the same room tem- perature with low illuminance.

ߦ͏ྋஆײʹର͢Δ7ஈ֊ධՁͷฏۉͰ͋ΓɼҎ߱ͷ

࣮ݧͰ΋ಉ༷Ͱ͋Δɽඃݧऀ͸ਫ৭ͷน໘র໌Λ఺౮

͢Δ෦԰ʢ27ˆʣ͕น໘র໌Λ఺౮͠ͳ͍෦԰ʢ27ˆʣ ΑΓྋ͍͠ͱධՁͨ͠ɽ·ͨɼ̎෦԰ͷྋஆײʹର͠

ͯWilcoxonͷॱҐ࿨ݕఆΛ༗ҙਫ४5%Ͱߦͬͨ݁

Ռɼ༗ҙͳ͕ࠩೝΊΒΕͨɽώΞϦϯάͰɼפ৭Ͱ͋

Δਫ৭ΛݟΔ͜ͱͰઇ΍ණͷΑ͏ͳ΋ͷΛ૝૾͠ɼྋ

͘͠ײͨ͡ͱ͍͏ҙݟ͕͋ͬͨɽ͜ͷ͜ͱ͔Βɼਫ৭ ͷน໘র໌Λ఺౮͢Δ͜ͱͰྋ͘͢͠ΔޮՌ͕͋Δͱ ߟ͑ΒΕΔɽ

ʢbʣͷ݁Ռͱͯ͠ɼน໘র໌Λ఺౮͠ͳ͍෦԰ͱ ਫ৭ͷน໘র໌Λ఺౮͢Δ2෦԰ͷྋஆײͷάϥϑΛ

Fig.8ʹࣔ͢ɽ

Fig. 8. A sense of coolness at the room temperature difference of 1ˆwith low illuminance.

ඃݧऀ͸ਫ৭ͷน໘র໌Λ఺౮͢Δ෦԰ʢ27ˆʣͷ

ํ͕ɼࣨԹ͕1ˆ௿͍น໘র໌Λ఺౮͠ͳ͍෦԰ʢ26 ˆʣΑΓྋ͍͠ͱධՁͨ͠ɽ·ͨɼ̎෦԰ͷྋஆײʹ

ରͯ͠WilcoxonͷॱҐ࿨ݕఆΛ༗ҙਫ४5%Ͱߦͬ

ͨ݁Ռɼ༗ҙͳ͕ࠩೝΊΒΕͨɽΑͬͯɼਫ৭ͷน໘ র໌ͷӨڹ͸ࣨԹࠩ1ˆҎ্ͷӨڹΛ༩͑Δͱߟ͑Β ΕΔɽ

ʢcʣͷ݁Ռͱͯ͠ɼน໘র໌Λ఺౮͠ͳ͍෦԰ͱ น໘র໌Λ఺౮͢Δ2෦԰ͷྋஆײͷάϥϑΛFig.9 ʹࣔ͢ɽ

Fig. 9. A sense of coolness at the room temperature difference of 2ˆwith low illuminance.

ඃݧऀ͸ਫ৭ͷน໘র໌Λ఺౮͢Δ෦԰ʢ27ˆʣͱɼ

ࣨԹ͕2ˆ௿͍น໘র໌Λ఺౮͠ͳ͍෦԰ʢ25ˆʣ͸

ಉఔ౓ͷྋஆײͱධՁͨ͠ɽ·ͨɼ̎෦԰ͷྋஆײʹ

ରͯ͠WilcoxonͷॱҐ࿨ݕఆΛ༗ҙਫ४5%Ͱߦͬ

ͨ݁Ռɼ༗ҙͳࠩ͸ೝΊΒΕͳ͔ͬͨɽ͜ͷ݁ՌΑΓɼ 2ˆࣨԹ͕ҟͳΔ෦԰Ͱ͋ͬͯ΋ྋஆײ͕ಉఔ౓Ͱ͋

Δ͜ͱ͔Βɼਫ৭ͷน໘র໌ͷӨڹ͸ࣨԹࠩ2ˆఔ౓

ͷӨڹΛ༩͑Δͱߟ͑ΒΕΔɽ

ʢdʣͷ݁Ռͱͯ͠ɼน໘র໌Λ఺౮͠ͳ͍෦԰ͱ

น໘র໌Λ఺౮͢Δ2෦԰ͷྋஆײͷάϥϑΛFig.10 ʹࣔ͢ɽ

Fig. 10. A sense of coolness at the room temperature difference of 3ˆwith low illuminance.

ඃݧऀ͸ਫ৭ͷน໘র໌Λ఺౮͢Δ෦԰ʢ27ˆʣͷ

ํ͕ɼࣨԹ͕3ˆ௿͍น໘র໌Λ఺౮͠ͳ͍෦԰ʢ24 ˆʣΑΓஆ͔͍ͱධՁͨ͠ɽώΞϦϯάͰɼਫ৭ͷน ໘র໌Λ఺౮͢ΔࣨԹ27ˆͷ෦԰͸ྋ͘͠ײ͡Δ͕ɼ

ࣨԹ24ˆͷ෦԰ͷํ͕Թ౓͕௿͘פ͘ײ͡Δͱ͍͏

ҙݟ͕͋ͬͨɽͦͷͨΊɼࣨԹࠩ3ˆͱ͍͏Թ౓ͷӨ ڹ͸ਫ৭ͷน໘র໌ͷӨڹΑΓେ͖͍͜ͱ͔Βɼਫ৭ ͷน໘র໌Λ఺౮ͯ͠΋ɼࣨԹࠩ3ˆͷӨڹΛಘΔ͜

ͱ͸Ͱ͖ͳ͍ͱߟ͑ΒΕΔɽ

5. ݁࿦ͱࠓޙͷల๬

ຊݚڀ͸น໘র໌Λ༻͍ͯɼՆقʹਫ৭ͷน໘র໌

͕ྋஆײʹͲͷఔ౓ӨڹΛ༩͑Δ͔Λ໌Β͔ʹ͢Δ͜

ͱΛ໨తͱͯ͠ඃݧऀ࣮ݧΛߦͬͨɽͦͷ݁ՌɼҎԼ ͷ݁࿦Λಘͨɽ

1ɽ௿র౓ʢ300 lxʣʹ͓͍ͯɼਫ৭ͷน໘র໌Λ఺౮

͢Δ෦԰ʢ27ˆʣͱน໘র໌Λ఺౮͠ͳ͍෦԰ʢ27ˆʣ Ͱ࣮ݧΛߦͬͨ݁Ռɼඃݧऀ͸ਫ৭ͷน໘র໌Λ఺౮

͢Δ෦԰ͷํ͕ྋ͍͠ͱײͨ͡ɽΑͬͯɼhue-heatԾ આͷఏএ௨Γɼפ৭Ͱ͋Δਫ৭ͷน໘র໌ʹΑͬͯྋ

͘͠ͳΔޮՌ͕͋Δɽ

2ɽ௿র౓ʢ300 lxʣʹ͓͍ͯɼਫ৭ͷน໘র໌Λ఺౮

͢Δ෦԰ʢ27ˆʣͱน໘র໌Λ఺౮͠ͳ͍෦԰ʢ25 ˆʣͷྋஆײ͸ಉఔ౓Ͱ͋ͬͨɽ͜Ε͸ɼਫ৭ͷน໘ র໌ʹΑͬͯࢹ໺಺ͷۭؒͷҹ৅͕มԽ͔ͨ͠ΒͰ͋

Γɼਫ৭ͷน໘র໌͸ਓͷྋஆײʹ27ˆΛج४ͱ͠

ͯࣨԹΛ2ˆఔ౓Լ͛Δ͜ͱͱಉ༷ͷӨڹ͕͋Δɽ 3ɽ௿র౓ʢ300 lxʣʹ͓͍ͯɼਫ৭ͷน໘র໌Λ఺౮

͢Δ෦԰ʢ27ˆʣͱน໘র໌Λ఺౮͠ͳ͍෦԰ʢ24 ˆʣͰ͸ɼน໘র໌Λ఺౮͠ͳ͍ɼࣨԹ͕௿͍෦԰ͷ

ํ͕ྋ͔ͬͨ͠ɽ͜ͷ݁ՌΑΓɼਫ৭ͷน໘র໌͸ࣨ

ԹΛ3ˆԼ͛Δ͜ͱͱಉ༷ͷӨڹΛ༩͑ͳ͍ɽ ࠓճ͸Նقʹਫ৭ͷน໘র໌Λ఺౮࣮ͯ͠ݧΛߦͬ

͕ͨɼۭௐͷ࢖༻͕૿Ճ͢Δ࣌ظͱͯ͠͸ՆقҎ֎ʹ ౙق͕ߟ͑ΒΕΔɽͦͷͨΊɼࠓޙ͸ౙقʹ΋࣮ݧΛ ߦ͍ɼஆ৭ܥͷน໘র໌͕ྋஆײʹ༩͑ΔӨڹΛݕূ

͢Δɽ·ͨɼຊݚڀͷ࣍ͷஈ֊ͱͯ͠ɼՆقͱౙقͷ

࣮ݧ݁ՌΛ΋ͱʹۭௐͱน໘র໌Λ࿈ಈͨ͠γεςϜ Λ࡞੒͢Δɽ͜ͷγεςϜ͸ɼۭௐͷઃఆԹ౓Λมߋ

ͤͣʹɼਓͷײ͡ΔྋஆײΛมԽͤ͞Δ͜ͱΛ໨తͱ

͢Δɽ͜ͷγεςϜʹΑͬͯɼྫ͑͹Նقʹॵ͍ͱײ

ͨ͡৔߹ʹɼਫ৭ͷน໘র໌Λ఺౮͢Δ͜ͱʹΑΓɼ

ۭௐͷઃఆԹ౓ΛมߋͤͣʹྋஆײΛҡ࣋͢Δ͜ͱ͕

ՄೳͱͳΔɽͦͷ݁Ռɼैདྷྫྷஆ๪࣌ʹۭௐʹׂ͔Ε

͍ͯͨిྗͷ࡟ݮʹܨ͕Δͱߟ͑ΒΕΔɽ

ຊݚڀ͸ɼJSTͷิॿۚʹج͚͍ͮ͘͸ΜͳϦαʔ νίϯϓϨοΫεͷݚڀϓϩδΣΫτͱ࣮ͯ͠ࢪ͞Ε

ͨɽ͜͜ʹهͯ͠ँҙΛද͢ɽ

ࢀߟจݙ

1) ੢ݪ௚ࢬ,ాล৽Ұ, “தఔ౓ͷߴԹ؀ڥԼʹ͓͚Δ஌తੜ࢈

ੑʹؔ͢Δඃݧऀ࣮ݧ”,೔ຊݐஙֶձ؀ڥܥ࿦จू,68[568], 33-39 (2003).

2) দݪࡈथ, ҏ౻߳බ,᤽੅ඒਔ,߹ঠݦ,௕໺࿨༤, “৭࠼ͱࣨ

Թͷෳ߹؀ڥʹର͢ΔಛҟతٴͼඇಛҟతධՁ”,೔ຊݐஙֶ

ձܭըܥ࿦จू,65[535], 39-45 (2000).

3) ༗ޫ఩඙, Ԭ࡚ܒޗ, ށҪ෢࢘, “Ի؀ڥٴͼ৭؀ڥͷෳ߹ࢗ

ܹ͕ମײԹ౓ʹٴ΅͢ӨڹͷධՁ”, ೔ຊԻڹֶձࢽ, 71[6], 267-275 (2015).

4) ੴҪਔɼງӽ఩ඒ, “ҟͳΔ࡞༻Թ౓ɾর౓Ϩϕϧɾޫݯͷ૊

Έ߹Θ͕ͤਓମͷੜཧɾ৺ཧ൓Ԡʹٴ΅͢ෳ߹తӨڹ”,೔ຊ ݐஙֶձܭըܥ࿦จू,64[517], 85-90 (1999).

5) C.A.Bennett, P.Rey, “What’s So Hot about Red?”,Hu- man Factors,14[2], 149-154 (1972).

6) ް ੜ ࿑ ಇ ল, “VDT ࡞ ۀ ʹ ͓ ͚ Δ ࿑ ಇ Ӵ ੜ ͷ ͨ Ί ͷ Ψ Π υ ϥ Π ϯ ʹ ͭ ͍ ͯ 2003”, https://www.mhlw.go.jp/file/06-Seisakujouhou- 11200000-Roudoukijunkyoku/0000184703.pdf(2003).