201204915 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種建物用天窗單元，且更詳細地係關於一 ;自内U與天窗—體化之流體流路，從而可經由流 體利用天窗所接收之太陽能之建物用天窗單元。 【先前技術】 _於冋層建築物之緊急樓梯或屋頂上等，為避免日光直射， 同時確保透氣性’而設置有隔著間隔平行地以複數片組裝有 複數個細長板(百葉板)之天窗。X，天窗亦用於遮掩放置於 屋頂上等之空調室外機或水槽等。 近年來，對於環境問題之社會關心在提高，從而亦已開發 出該種建物用天窗之百葉板中組裝有太陽電池之天窗型太 陽電池單元(參照專利文獻。 [先前技術文獻] [專利文獻] 專利文獻1:日本專利特開2003-336465號公報 【發明内容】 (發明所欲解決之問題） 然而，目前市售之太陽電池之發電效率即便較高，亦僅為 20%左右，故太陽能之有效利用成為課題。即便於將太陽電 池板設置於天窗表面之情形時，未被發電利用之大部分太陽 能因轉變為熱量，故存在因設置天窗而導致其周圍溫度上升 100120317 3 201204915 之問題。又，若目前普及之結晶發型太陽電池達到高溫時， 則亦會引起發電效率降低之問題。 因此，本發明人等以解決上述先前技術之問題點，以更有 效地利用太陽能為目的，而對天窗單元之構造進行研究，經 過銳意研究開發，從而完成本發明。 (解決問題之手段） 即’為達成上述目的，本判係提供—種建物用天窗單 元，其特徵在於：其係包含表面部⑴、支樓該表面部之天 窗本體(2)、用以使流體通過之中空構造部⑸，且上述天窗 本體(2)係包括底面部〇2)與側面部⑴），上述中空構造部 (5)，係位於由上述表面部⑴與上述天窗本體⑺形成之空間 部（13)内’且以與上述表面部之背面密著之狀態或隔著間隙 而設置。 (發明效果） 根據本發明其提供一種建物用天窗單元，可藉由於其構造 中设置流體之流路，進而製成有效率地進行朝向流體之熱傳 遞之結構而可利用更多之太陽能。藉由利用本發明之天窗單 兀’可提供一種多方位地利用太陽能之優異之光熱混合系 統。 【實施方式】 其次’ 一面參照圖式，一面說明用以實施本發明之較佳形 態。 100120317 4 201204915 圖1係本發明實施形態之1態樣之剖面圖。本發明之天窗 單元’係包含表面部（1)、支#該表面部之天窗本體(2)、及 用以使流體通過之中空構造部（5)。表面部（1)係指天窗單元 中相當於太陽光之受光面之部分。表面部（丨）係可將與天窗 本體(2)分開單獨製造者固定於天窗本體(2)，但亦可如圖！ 所示，與天窗本體(2) —體成形。又，表面部（1)亦可如圖3 所不，由太陽電池板形成。太陽電池板(7)係例如複數個太 陽電池單元排列而成者，且可使用市售者。 上述天窗本體(2)係包含底面部（12)與侧面部（11)。於底面 部（12)為大致矩形之情形時，侧面部（11)亦可僅形成於底面 部（12)之長度方向之相對向之面上，但考慮到自外部隔離天 窗單7G内部之空間部（13)而維持溫度或濕度等内部環境之 觀點’則較佳為’以製成封閉空間部（13)之空間之方式而設 置於4個面上。 上述中空構造部（5)必需於其内部具有用以使流 體通過之 中空部分。流體係用於奪取本發明之天窗單元所接收之太陽 光中，成為熱能而導致天窗或其周邊之溫度上升之熱。該流 體只要具有可於中空構造部(5)之内部移動之流動性，則成 為氣體、液體、以及粉體及粒狀體等固體均可，但就經濟性 及熱能回收之便利性而言，較佳為空氣或液體，更佳為使用 液體。又作為液體’就經濟性、通用性方面而言，更佳為使 用水。 100120317 5 201204915 該中空構造部（5) ’係以與表面部（1)之背面密著之狀態或 隔著間隙設置於上述空間部（13)内。「密著之狀態」除了中 空構造部（5)與表面部（1)之背面直接密著之情形以外，亦包 括如圖1所記載，表面部（1)與中空構造部(5)之一面一體化 之情形，或如圖3所示，中空構造部（5)與表面部之背面 介隔導熱片（21)而密著之情形。如表面部（1)為太陽電池板(7) 之情形般’於表面部（1)與中空構造部(5)為不同構件之情形 時，可藉由使用導熱片而減小因表面部（1)或中空構造部（5) 不平坦而造成之不良影響。即，可藉由表面部（1)或中空構 造部（5)上存在之翹曲或略微之凹凸，而填充使表面部與中 空構造部密著時產生之空隙，從而防止熱傳遞效率之低下。 又，亦具備吸收使表面部與中空構造部接觸時之應力之效 果。 〜 導熱片較佳為'具有〇·! W/mK以上之導熱率，更佳為j W/mK以上。作為材質並無特別限定，可使用石墨片、石夕橡 膠片等市售者。表面部⑴與中空構造部(5)-體成形之情 形、或者表面部（1)之背面與中空構造部(5)密著之情形，因 熱傳遞效率較高，因特別佳因而被採用。 另一方面，於表面部（1)之背面與中空構造部(5)之間存在 間隙之情形時，熱將經由空氣，或者藉由來自表面部之背面 之熱輻射及熱對流而向中空構造部（5)傳遞。若間隙之間隔 較大時，則熱之傳遞效率降低，因此，表面部（1)之背面與 100120317 6 201204915 中空構造部（5)之間隙以2G mm以下較佳，更佳為丨G職以 下。 再者，於本發明中，所謂表面部⑴之背面，係指相對於 受光面為相反側之面。 本發明之建物用天由單元，係將上述中空構造部（5)沿長 度方向設置於表面部（1)之背面。圖4係於太陽電池板之背 面之2個部位，沿長度方向平行地設置有中空構造部（5)。 自一端部（例如右端）導入之流體一面自中空構造部（5)之内 壁奪取熱，一面到達另一端部（例如左端）。 根據如此之構造，本發明之天窗單元不僅具有天窗原本之 遮蔽曰照而削減建物冷氣負荷及隱蔽之功能，而且可有效地 利用熱轉換之太陽能，同時亦有助於防止天窗周邊之溫度上 升，而緩解熱島(heat island)現象。尤其於表面部（1)為太陽 電池板之情形時，可有效地利用由太陽電池轉換為熱而並非 轉換為電氣之太陽能，同時，若溫度上升時，則太陽電池之 轉換效率降低，因此，可冷卻太陽電池板，而可抑制發電效 率之低下。又，其可阻止太陽電池板之急劇的溫度變化，緩 解對太陽電池模組造成之損害，故亦有助於太陽電池模組之 穩疋化、長胥命化。 於本發明之天窗單元中，較佳為，上述中空構造部（5)藉 由自天窗本體（2)之側面部（11)朝向空間部（13)設置之支撐 部(3)而固定。如圖3所示，可藉由橋接中空構造部(5)與對 100120317 7 201204915 向之兩側面部（11)而防止天窗本體之變形。進而，可藉由使 中空構造部（5)與表面部（1)之背面密著，而亦利用中空構造 部支撐表面部（1)之重量，因此，可進一步提高本發明之天 窗單元的構造穩定性，故而較佳。 又，如圖1、圖3、圖5所示，可藉由於天窗本體(2)之底 面部（12)沿長度方向設置支撐中空構造部（5)之重量之支撐 板(8) ’而使中空構造部穩定，從而可提高天窗單元整體之 剛性。 中工構造部（5)與天窗本體之支稽'部(3)雖可焊接固定，作 亦可介隔隔熱材或緩衝材等而固定。 進而，作為本發明之其他形態，中空構造部（5)，較佳係 採用藉由擠出成形等一體成形，而自天窗本體之兩側面部 (11)經由支撐部（3)而呈一體化。於使中空構造部（5)與天窗 本體(2)—體化地擠出成形之情形時，可藉由設置上述支撐 板(8) ’而防止擠出成形時之中空構造部（5)與天窗本體之支 撐部(3)之翹曲、彎曲、變形，從而使表面部（1)與中空構造 部（5)維持所希望之間隔，因此，採用上述情形尤佳。 於本發明之天窗單元中，可使中空構造部(5)配置於表面 部⑴之背面之i個部位或者複數個部位，但就使流體通過 時之壓力調節之便利性而言，較佳為2個部位以上。另一方 面，為了格保製造之便利性、或表面部⑴為太陽電池板時 確保太陽電池之附屬設備之設置部位，以配置部位較少者較 100120317 〇 201204915 佳。於上述之點，較佳為2個部位，如圖1、圖3、圖5所 示，較佳為沿著長度方向於2個部位平行排列地配置。 上述中空構造部（5)，如圖1所示，亦可與表面部（1)或天 窗本體(2)呈一體化，或一體成形亦可。又，如圖3所示， 亦可為使複數個中空構造部一體化，並藉由支撐部(3)而將 該中空構造部固定於天窗本體之構造。作為其他態樣，亦可 為介隔梁板(未圖示）固定複數個中空構造部（5)彼此之間，且 藉由支撐部（3)而將其兩側面固定於天窗本體之構造，如此 亦可。 與流體通過之方向正交地截斷中空構造部本體（31)時之 較佳之剖面形狀之一，可列舉如圓形。使用剖面為圓形之中 空構造部（5)之天窗單元之例示如圖10。於本發明之天窗單 元中，可藉由於1個天窗單元中設置複數個中空構造部（5)， 且利用U字管等連結該中空構造部（5)彼此之間，而將熱能 高效地回收至流動於其中之流體。連結用之管或具有可撓性 之管大多利用剖面為圓形者，由於該等連結之可靠性亦優 異，故而從將中空構造部（5)彼此之間連結之觀點而言，較 佳為，至少中空構造部（5)之兩端其剖面形狀為圓形為佳。 於使中空構造部（5)與天窗本體(2)—體化地擠出成形之情形 時，因無法僅改變端部之形狀，故以中空構造部本體(31)之 剖面形狀為圓形較佳。 中空構造部（5)本體之剖面形狀為圓形態樣之例，如圖10 100120317 9 201204915 所示，亦可藉由擠出成形而使支撐部(3)與中空構造部(5)、 及天窗本體(2)等一體成形，並使其密著或隔著間隙安裝於 太陽電池板(7)之背面而使用。於中空構造部（5)與太陽電池 板(7)之背面具有間隙之情形時，於該間隙設置導熱片（21) 為佳。 與流體通過之方向正交地截斷中空構造部本體(31)時之 其他較佳的剖面形狀，可列舉矩形且於將該剖面之長邊長度 設為L，短邊長度設為D時，L/D$ 2以上，且長邊面向: 述表面部⑴之背面者。藉由此-方式，可將中空構造部本 體⑼製成平坦狀’且其具有魏面積之部分與表面部⑴ 之背面密著麵向之構造’叫加表㈣與中球造部之接 觸面積，同時，使中空構造部(顺流體之接觸面積増大， 從而可使料至中空構造部(5)之本體内部之流體有效率地 矩發明之天窗單元之中空構造部本體(31)的剖面為 ^之情形之態樣例’可列舉長邊之長度L為80輸，短 邊之長度D為25 mm，流路叫 流體之熱傳遞效率而言，^ 3積為屬麵者。就朝向 u為3以上較佳，更佳為5以上。 再者’此處之中空構造部本體(3ι)，係指具有後述突起之 情形除去突起等之骨架部。於 部⑺中之本即丨）。⑽6巾，以雜麵中空構造 又，就熱能之吸收效率方面而言，於將上述表面部⑴之 100120317 201204915 受光面之投影面積設為A卜將中 受光面之總投影面積(例如，工構1^本體⑴)對上述 為A2時，A2/A1達到〇 3 81 4由影線表示者)設 比 上較佳，更佳為達到05以卜 藉此，可使熱吸收效率提 運j .5以上， 之受光面的投影面積：係: 面的面積，於® 2 _ 4 +朝者太陽方向時之 矩形部分。 才目虽於由外侧之實線所包圍之 二表之=中空構造部(5)未一體化之情形時，與表面 之㈣向一側之中空構造部(5)之面為平坦面，藉 此，來自表面部⑴之背面的熱傳遞效率變高，故而較佳。 就朝向流體之熱傳遞效率之點而言，上述Μ構 之材質較佳為導熱率較高者，且較佳為使用常溫下之導熱率 為100 W/mK以上者。該種素材之例可列舉銘、銅等。尤其 鋁，其加工性優異，且因輕量之點而較為優異。 ” *如Ή不’巾空構造部(5)其内壁亦可具有朝向内側之 藉由犬起可使與流體之接觸面積增大，而使朝向流體 之熱傳j效率提高。又，如圖8所示，可藉由外壁具有朝向 外側之突起更有效地將空間部⑽之熱傳遞至流體，故 而較佳。除此以外，中空構造部之其他態樣之例，可列舉如 圖6、圖7所示之態樣。 又，本發明之建物用天窗單元對天窗本體之空間部（Π)填 充隔熱材’如此亦可。例如可藉由利用隔熱材覆蓋側面部⑼ 100120317 11 201204915 與底面部（12)，而防止冬季使用時流體之熱自側面部（11)或 底面部（12)而流失。又，其亦可保護該天窗單元不會凍結。 作為隔熱材，可使用玻璃棉或岩棉等無機纖維及聚胺基曱酸 酯發泡體或聚苯乙烯發泡體等發泡體。 於本發明之天窗單元中，當表面部（1)為太陽電池板(7)之 情形時，作為太陽電池板(7)之固定方法之一例，如圖3、圖 5所示，可列舉由固定於天窗本體(2)之太陽電池板保持部(4) 來固定太陽電池板之方法。該保持部(4)亦可介隔氟樹脂膠 帶而與天窗本體(2)密著，或與天窗本體一體成形亦可。 藉由本發明之天窗單元而回收至流體中之熱能，可以用已 知之方法來利用。例如當使用水作為流體之情形時，可設置 儲存由太陽能加熱之溫水的儲槽、及用來供給該溫水之泵， 而來對建物供給溫水以作為溫水供給裝置。 又，本發明之天窗單元與流體之其他利用態樣，可列舉如 藉由夜間之放射冷卻而使設置於建物外部之天窗的溫度變 知比軋酿還低之情形。具體而言，可使白天變暖之流體流至 夜間變冷之本發明之天窗，而使流體之溫度下降，並藉由使 該被冷卻之流體於建物内部之屋頂或地板中循環而利用於 使白天變暖建物内之冷卻。 [實施例] 製造具有表面部（1)為太陽電池板(7)之圖5記載之構成之 銘製天窗單元。使中空構造部(5)與太陽電池板(7)其間予以 100120317 12 201204915 夾隔導熱片而密著。 將該天窗單元設置於室溫30。(：之人工氣象室，並使中空 構造部（5)之一端（入口）連接至水溫保持於15〇c之儲水槽， 使另一端（出口）為排水口，且分別於中空構造部(5)之入口與 . 出口設置溫度感測器。又，亦於太陽電池板(7)表面設置溫 度感測器。於中空構造部（5)之入口與出口設置检，且將入 口側之检用於水量之調節。 於中空構造部（5)中裝滿水之狀態下關閉出口之栓，以曰 照量900 W/m2之方式對太陽電池板(7)照射模擬太陽光，且 自開始照射時起至211分鐘後為止，每隔1分鐘利用各溫度 感測器s己錄一次溫度。又，自照射模擬太陽光起1〇5分鐘 後’以流量達到500 mL/分鐘之方式對中空構造部（5)中通 水。再者，自開始實驗起至34分鐘〜44分鐘之間，暫時中 斷模擬太陽光之照射。 於圖11中，用實線表示中空構造部（5)入口之水溫，以單 點虛線表示出口之水溫，用點線表示太陽電池板(7)表面之 溫度。又，用圓圈（〇)表示太陽電池之發電量。 通水後之入口處水溫為18〜19°C，與此相對的，出口處 之水’皿為24〜25°C，表示可藉由本發明之天窗單元而將太 陽能作為熱能回收。又，通水開始前，贼以上之太陽電池 田表面之/jnL度因通水而降低至49〜5G<3c為止。隨著該表面 /皿度降低’太陽電池板之發電量於通水前為約Μ W，而於 100120317 13 201204915 通水後為約3〇 W，增加了 20%。自該結果可知，藉由將本 發明之天窗單元之表面部（1)製成太陽電池板(7)，可高效率 地回收從來無法藉由習知之太陽電池板用於發電之太陽能 作為熱能’進而亦明顯可提高太陽電池之發電效率。 (產業上之可利用性） 根據本發明，其提供一種可藉由其構造中設置流體之流 路，並形成可有效率地朝向流體之熱傳遞之構成，而可利用 更多之太陽能之建物用天窗單元。藉由利用本發明之天窗單 元可提供一種多方位地利用太陽能之優異的光熱混合系 統。且回收至流體中之熱量可以溫水等形態而利用。 【圖式簡單說明】 圖1係本發明實施形態之一例之剖面圖。 圖2係本發明實施形態之一例之平面圖。 圖3係本發明其他實施形態之剖面圖。 圖4係本發明其他實施形態之平面圖。 圖5係本發明實施形態之一例之剖面斜視圖。 圖6係其他態樣之中空構造部之剖面圖。 圖7係其他態樣之中空構造部之剖面圖。 圖8係其他態樣之中空構造部之剖面圖。 圖9係其他態樣之中空構造部之剖面圖。 圖10係本發明之其他實施形態之剖面圖。 圖11係將人工氣象室中之貫驗結果匯總所得之圖表。 100120317 14 201204915 【主要元件符號說明】 1 表面部 2 本體天窗本體 3 支撐部 4 太陽電池板保持部 5 中空構造部 7 太陽電池板 8 支撐板 11 側面部 12 底面部 13 空間部 21 導熱片 31 中空構造部本體 100120317 15201204915 VI. Description of the Invention: [Technical Field] The present invention relates to a sunroof unit for construction, and in more detail relates to a fluid flow path from the inner U and the sunroof, so that the sunroof can be utilized via the fluid The sunroof unit for the solar energy received. [Prior Art] _ On an emergency staircase or roof of a slab building, in order to avoid direct sunlight and at the same time ensure air permeability, a plurality of elongated plates (louvers) are assembled in parallel with a plurality of sheets spaced apart in parallel. Skylight. X, the sunroof is also used to cover the air conditioner outdoor unit or sink placed on the roof. In recent years, the social interest in environmental issues has been increasing, and a solar cell type solar cell unit in which solar cells are assembled in the louver of the sunroof for construction is also known (refer to the patent literature) [Prior Art Document] [Patent Literature] Patent Document 1: Japanese Laid-Open Patent Publication No. 2003-336465 (Draft of the Invention) (Problems to be Solved by the Invention) However, the power generation efficiency of currently commercially available solar cells is only about 20% even higher, so solar energy Effective use is a problem. Even when a solar panel is placed on the surface of a sunroof, most of the solar energy that is not used for power generation is converted into heat, so there is a problem that the ambient temperature rises by the sunshade by 100120317 3 201204915. When the current crystallized hair cell reaches a high temperature, the problem of lowering the power generation efficiency is also caused. Therefore, the present inventors have solved the above problems of the prior art to use solar energy more efficiently, and to the sunroof. The structure of the unit was studied and the research and development was carried out intensively to complete the present invention. The means for solving the problem is that, in order to achieve the above object, the present invention provides a sunroof unit for a building structure, characterized in that it comprises a surface portion (1) and a sunroof body (2) of the surface portion of the branch to pass the fluid. a hollow structure portion (5), wherein the sunroof body (2) includes a bottom surface portion 2) and a side surface portion (1), and the hollow structure portion (5) is located in a space portion formed by the surface portion (1) and the sunroof body (7) (13) The inside is provided in a state of being adhered to the back surface of the surface portion or a gap therebetween. (Effect of the Invention) According to the present invention, there is provided a sunroof unit for construction which can utilize more solar energy by providing a fluid flow path in its structure and thereby making a structure for efficiently transferring heat toward a fluid. By using the sunroof single 兀' of the present invention, it is possible to provide an excellent photothermal mixing system that utilizes solar energy in multiple directions. [Embodiment] Next, the preferred embodiment for carrying out the invention will be described with reference to the drawings. 100120317 4 201204915 Fig. 1 is a cross-sectional view showing a first embodiment of the present invention. The sunroof unit of the present invention includes a surface portion (1), a sunroof body (2) supporting the surface portion, and a hollow structure portion (5) for passing a fluid therethrough. The surface portion (1) refers to a portion of the sunroof unit that corresponds to the light receiving surface of sunlight. The surface part (丨) can be fixed to the sunroof body (2) separately from the sunroof body (2), but it can also be shown! As shown, it is formed integrally with the sunroof body (2). Further, the surface portion (1) may be formed of a solar cell panel as shown in Fig. 3 . The solar panel (7) is, for example, a plurality of solar cells arranged in a row, and can be used by a commercially available person. The sunroof body (2) includes a bottom surface portion (12) and a side surface portion (11). When the bottom surface portion (12) is substantially rectangular, the side surface portion (11) may be formed only on the opposite side of the longitudinal direction of the bottom surface portion (12), but the space inside the sunroof single 7G is isolated from the outside. The viewpoint of maintaining the internal environment such as temperature and humidity in the portion (13) is preferably set to four surfaces so as to form a space in the closed space portion (13). The hollow structure portion (5) must have a hollow portion inside it for allowing the fluid to pass therethrough. The flow system is used to capture the heat of the sunlight received by the sunroof unit of the present invention which becomes thermal energy and causes the temperature of the sunroof or its surroundings to rise. The fluid may be a gas, a liquid, or a solid such as a powder or a granule, as long as it has fluidity that can move inside the hollow structure portion (5), but in terms of economy and convenience of heat recovery, It is preferably air or liquid, and more preferably liquid. Further, as a liquid, it is more preferable to use water in terms of economy and versatility. 100120317 5 201204915 The hollow structure portion (5)' is placed in the space portion (13) in a state of being adhered to the back surface of the surface portion (1) or a gap therebetween. In the "closed state", in addition to the case where the hollow structure portion (5) is directly adhered to the back surface of the surface portion (1), the surface portion (1) and the hollow structure portion (5) are also included as shown in Fig. 1 . In the case of integration, as shown in FIG. 3, the hollow structure portion (5) and the back surface of the surface portion are separated by the heat transfer sheet (21). When the surface portion (1) is a solar panel (7), when the surface portion (1) and the hollow structure portion (5) are different members, the surface portion can be reduced by using the heat conductive sheet ( 1) Or the hollow structure portion (5) is not flat and has an adverse effect. In other words, the gap formed when the surface portion and the hollow structure portion are adhered can be filled by the warpage or the slight unevenness existing on the surface portion (1) or the hollow structure portion (5), thereby preventing the heat transfer efficiency from being lowered. . Further, it also has the effect of absorbing the stress when the surface portion comes into contact with the hollow structure portion. ~ The thermal conductive sheet is preferably 'having a thermal conductivity of 〇·! W/mK or more, more preferably j W/mK or more. The material is not particularly limited, and commercially available ones such as graphite sheets and Shishi rubber sheets can be used. The surface portion (1) and the hollow structure portion (5) are formed in a body shape, or the back surface of the surface portion (1) is adhered to the hollow structure portion (5). Since the heat transfer efficiency is high, it is preferably used. On the other hand, when there is a gap between the back surface of the surface portion (1) and the hollow structure portion (5), heat is transferred to the hollow structure via air or by heat radiation and heat convection from the back surface of the surface portion. Department (5) passed. When the interval between the gaps is large, the heat transfer efficiency is lowered. Therefore, the gap between the back surface of the surface portion (1) and the hollow structure portion (5) of 100120317 6 201204915 is preferably 2 G mm or less, more preferably 丨G or less. . Further, in the present invention, the back surface of the surface portion (1) means a surface opposite to the light receiving surface. In the sky-use unit of the present invention, the hollow structure portion (5) is provided on the back surface of the surface portion (1) in the longitudinal direction. Fig. 4 is a view showing two places on the back surface of the solar cell panel, and a hollow structure portion (5) is provided in parallel along the longitudinal direction. The fluid introduced from one end (e.g., the right end) picks up heat from the inner wall of the hollow structure portion (5) and reaches the other end (e.g., the left end). According to such a configuration, the sunroof unit of the present invention not only has the function of reducing the cold air load and concealment of the building, but also effectively utilizes the heat-converted solar energy, and also helps prevent the temperature rise around the sunroof. And to alleviate the heat island phenomenon. In particular, when the surface portion (1) is a solar cell panel, solar energy that is converted into heat by the solar cell and not converted into electricity can be effectively utilized, and if the temperature rises, the conversion efficiency of the solar cell is lowered. It can cool the solar panels and suppress the low efficiency of power generation. Moreover, it can prevent the rapid temperature change of the solar panel and alleviate the damage caused to the solar cell module, thereby contributing to the stability and long life of the solar cell module. In the sunroof unit of the present invention, it is preferable that the hollow structure portion (5) is fixed by a support portion (3) provided from a side surface portion (11) of the sunroof body (2) toward the space portion (13). As shown in Fig. 3, the deformation of the sunroof body can be prevented by bridging the hollow structure portion (5) and the pair of faces 12011 to 201201815. Further, since the hollow structure portion (5) can be adhered to the back surface of the surface portion (1), and the weight of the surface portion (1) can be supported by the hollow structure portion, the structure of the sunroof unit of the present invention can be further improved. Stability is therefore preferred. Further, as shown in Fig. 1, Fig. 3, and Fig. 5, the bottom plate portion (12) of the sunroof body (2) can be provided with a support plate (8) which supports the weight of the hollow structure portion (5) in the longitudinal direction. The hollow structural portion is stabilized, thereby improving the rigidity of the entire sunroof unit. The middle structure structure (5) and the skylight body's branch section (3) can be welded and fixed, and can be fixed by means of a heat insulating material or a cushioning material. Further, as another aspect of the present invention, the hollow structure portion (5) is preferably integrally formed by extrusion molding or the like, and is integrated from the side surface portions (11) of the sunroof main body via the support portion (3). . When the hollow structure portion (5) and the sunroof body (2) are integrally formed by extrusion molding, the hollow structure portion (5) at the time of extrusion molding can be prevented by providing the above-mentioned support plate (8)' The warpage, bending, and deformation of the support portion (3) of the sunroof body maintain the desired interval between the surface portion (1) and the hollow structure portion (5). Therefore, it is particularly preferable to adopt the above-described case. In the sunroof unit of the present invention, the hollow structure portion (5) may be disposed at i or a plurality of portions on the back surface of the surface portion (1), but in terms of convenience of pressure adjustment when the fluid passes, it is preferably More than 2 parts. On the other hand, in order to ensure the convenience of manufacturing, or when the surface part (1) is a solar panel, the installation location of the solar cell's auxiliary equipment is better than the 100120317 〇 201204915. Preferably, the two points are as shown in Fig. 1, Fig. 3, and Fig. 5, and are preferably arranged in parallel along the longitudinal direction at two locations. As shown in Fig. 1, the hollow structure portion (5) may be integrated with the surface portion (1) or the sunroof body (2), or may be integrally formed. Further, as shown in Fig. 3, a plurality of hollow structural portions may be integrated, and the hollow structural portion may be fixed to the sunroof body by the support portion (3). As another aspect, a structure in which a plurality of hollow structural portions (5) are fixed to each other by a spacer beam plate (not shown) and the both side surfaces thereof are fixed to the sunroof body by the support portion (3) may be employed. This is also possible. One of the preferable cross-sectional shapes when the hollow structure portion main body (31) is cut orthogonally to the direction in which the fluid passes is exemplified by a circular shape. An example of a sunroof unit having a circular hollow structure portion (5) is shown in Fig. 10. In the sunroof unit of the present invention, heat can be efficiently recovered by providing a plurality of hollow structure portions (5) in one sunroof unit and connecting the hollow structure portions (5) with each other by a U-shaped tube or the like. To the fluid flowing in it. The tube for connection or the tube having flexibility is often circular in cross section, and since the reliability of the connection is excellent, it is preferable from the viewpoint of connecting the hollow structure portions (5) to each other. At least the cross-sectional shape of both ends of the hollow structure portion (5) is preferably circular. When the hollow structure portion (5) and the sunroof body (2) are integrally formed by extrusion molding, since the shape of the end portion cannot be changed, the cross-sectional shape of the hollow structure portion body (31) is circular. good. The hollow structure portion (5) has a cross-sectional shape which is a circular shape. As shown in FIG. 10 100120317 9 201204915, the support portion (3) and the hollow structure portion (5), and the sunroof can also be formed by extrusion molding. The main body (2) or the like is integrally formed and attached to the back surface of the solar cell panel (7) with a gap or a gap therebetween. In the case where the hollow structure portion (5) has a gap with the back surface of the solar cell panel (7), it is preferable to provide the heat transfer sheet (21) in the gap. Another preferred cross-sectional shape when the hollow structure portion main body (31) is cut orthogonally to the direction in which the fluid passes is a rectangle, and when the length of the long side of the cross section is L, and the length of the short side is D, L /D$ 2 or more, and the long side faces: The back side of the surface part (1). By this means, the hollow structure portion body (9) can be made flat, and the contact area between the portion having the Wei area and the surface of the surface portion (1) facing the surface of the surface portion (4) and the middle ball portion can be made. At the same time, the hollow structure portion (the contact area with the fluid is enlarged, so that the fluid to the inside of the body of the hollow structure portion (5) can be efficiently moved. The section of the hollow structure portion body (31) of the sunroof unit of the invention is The case of the situation of 'the case' can be exemplified as the length L of the long side is 80, the length D of the short side is 25 mm, and the flow path is called the heat transfer efficiency of the fluid, and the product of the sum is the face. Further, it is preferably 3 or more, and more preferably 5 or more. Further, the term "the hollow structure portion body (3") herein refers to a skeleton portion in which a protrusion or the like is removed in the case of a protrusion described later. (10) 6 towel, with a hollow surface structure, in terms of the absorption efficiency of heat energy, the projected area of the light-receiving surface of the surface portion (1) of 100120317 201204915 is set as the total projected area of the light-receiving surface (for example, construction) 1 ^ body (1)) For the above A2, A2 / A1 reaches 〇 3 81 4 by the hatched line) is better than the best, preferably to achieve 05, so that the heat absorption efficiency can be transported j. 5 or more, the projected area of the light receiving surface: the area of the surface, in the rectangular part of the ® 2 _ 4 + toward the sun. In the case where the hollow structure portion (5) surrounded by the solid line on the outer side is not integrated, the surface of the hollow structure portion (5) on the side of the surface (4) is a flat surface. Therefore, the heat transfer efficiency from the back surface of the surface portion (1) is high, which is preferable. In view of the heat transfer efficiency toward the fluid, the material of the above-mentioned structure is preferably one having a higher thermal conductivity, and it is preferable to use a heat conductivity of 100 W/mK or more at normal temperature. Examples of such materials include Ming, copper, and the like. In particular, aluminum is excellent in workability and is excellent in light weight. * If the inner wall of the stencil structure (5) has an inner wall, the contact area with the fluid can be increased by the dog, and the heat transfer efficiency toward the fluid is improved. As shown in Fig. 8, the heat of the space portion (10) can be more effectively transmitted to the fluid by the protrusion having the outer wall, and the other examples of the hollow structure portion are as shown in Fig. 6. Further, the sunroof unit for a building according to the present invention may be such that the space portion of the sunroof body is filled with a heat insulating material. For example, the side portion can be covered by a heat insulating material (9) 100120317 11 201204915 And the bottom surface portion (12) prevents the heat of the fluid from being lost from the side surface portion (11) or the bottom surface portion (12) during winter use. Further, it can also protect the sunroof unit from freezing. As a heat insulating material, it can be used. An inorganic fiber such as glass wool or rock wool, or a foam such as a polyamino phthalate foam or a polystyrene foam. In the sunroof unit of the present invention, when the surface portion (1) is a solar panel (7) In the case of the solar panel (7), as an example of the fixing method of the solar panel (7), As shown in Fig. 3 and Fig. 5, a method of fixing a solar cell panel by a solar panel holding portion (4) fixed to the sunroof body (2) may be mentioned. The holding portion (4) may also be interspersed with a fluororesin tape. The heat can be recovered from the sunroof body (2) or integrated with the sunroof body. The heat energy recovered into the fluid by the sunroof unit of the present invention can be utilized by known methods, for example, when water is used as the fluid. A storage tank for storing warm water heated by solar energy and a pump for supplying the warm water may be provided to supply warm water to the building as a warm water supply device. Further, the sunroof unit of the present invention and other utilization states of the fluid For example, the temperature of the sunroof provided outside the building can be changed to be lower than that of the pulverization by radiation cooling at night. Specifically, the present invention can be made that the fluid that warms during the day flows to the night. The sunroof, the temperature of the fluid is lowered, and is utilized to cool the daytime warming building by circulating the cooled fluid in the roof or floor inside the building. [Example] Manufacturing has a surface portion (1) ) too The sunroof unit is constructed as shown in Fig. 5 of the battery panel (7), and the hollow structure portion (5) and the solar battery panel (7) are sandwiched between the heat-transfer sheets by the 100120317 12 201204915. Room temperature 30. (: the artificial meteorological chamber, and one end (inlet) of the hollow structure part (5) is connected to the water storage tank whose water temperature is maintained at 15〇c, and the other end (outlet) is the drain port, and respectively a temperature sensor is provided at the inlet and the outlet of the hollow structure portion (5). Further, a temperature sensor is also disposed on the surface of the solar panel (7). The inlet and the outlet of the hollow structure portion (5) are inspected and will be The inspection on the inlet side is used to adjust the amount of water. The plug of the outlet is closed in the state where the hollow structure (5) is filled with water, and the solar panel (7) is irradiated with simulated sunlight in a manner of 900 W/m2. And, from the time of starting the irradiation to 211 minutes, the temperature was recorded once every 1 minute using each temperature sensor s. Further, after 1 to 5 minutes from the irradiation of the simulated sunlight, water was passed through the hollow structure portion (5) so that the flow rate reached 500 mL/min. Furthermore, from the start of the experiment to between 34 minutes and 44 minutes, the simulated sunlight was temporarily interrupted. In Fig. 11, the water temperature at the inlet of the hollow structure portion (5) is indicated by a solid line, the water temperature at the outlet is indicated by a dotted line, and the temperature of the surface of the solar panel (7) is indicated by a dotted line. Also, a circle (〇) is used to indicate the amount of power generated by the solar cell. The water temperature at the inlet after the water passage is 18 to 19 ° C, and the water at the outlet is 24 to 25 ° C, indicating that the solar energy can be recovered as heat energy by the sunroof unit of the present invention. Moreover, before the start of water flow, the surface of the solar cell field above the thief is reduced to 49~5G<3c due to water passing. As the surface/container decreases, the power generation of the solar panel is about ΜW before the water is passed, and about 3 〇W after the water is passed through 100120317 13 201204915, an increase of 20%. From this result, it is understood that by making the surface portion (1) of the sunroof unit of the present invention into a solar panel (7), it is possible to efficiently recover solar energy which has never been used for power generation by a conventional solar panel as heat energy' Furthermore, it is also apparent that the power generation efficiency of the solar cell can be improved. (Industrial Applicability) According to the present invention, there is provided a structure in which a fluid can be disposed in a configuration thereof and a heat transfer to the fluid can be efficiently formed, and more solar energy can be utilized. Use the skylight unit. By using the sunroof unit of the present invention, it is possible to provide an excellent photothermal mixing system that utilizes solar energy in multiple directions. The heat recovered into the fluid can be utilized in the form of warm water or the like. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing an example of an embodiment of the present invention. Fig. 2 is a plan view showing an example of an embodiment of the present invention. Figure 3 is a cross-sectional view showing another embodiment of the present invention. Figure 4 is a plan view showing another embodiment of the present invention. Fig. 5 is a cross-sectional perspective view showing an embodiment of the present invention. Fig. 6 is a cross-sectional view showing a hollow structural portion of another aspect. Fig. 7 is a cross-sectional view showing a hollow structural portion of another aspect. Fig. 8 is a cross-sectional view showing a hollow structural portion of another aspect. Fig. 9 is a cross-sectional view showing a hollow structural portion of another aspect. Figure 10 is a cross-sectional view showing another embodiment of the present invention. Figure 11 is a graph summarizing the results of the tests in the artificial meteorological room. 100120317 14 201204915 [Description of main component symbols] 1 Surface portion 2 Main body sunroof body 3 Support portion 4 Solar panel holding portion 5 Hollow structure portion 7 Solar panel 8 Support plate 11 Side portion 12 Bottom portion 13 Space portion 21 Thermal sheet 31 Hollow Structure part body 100120317 15