201202642 六、發明說明： 【明戶斤4軒々貝】 發明領域 本發明係有關於一種冰箱，係底面具有移動機構者， 且該移動機構配置在冰箱底面之後側者。 C先前技術3 發明背景 家用冰箱構造成於底面之後側左右具有滾輪，使冰箱 可前後移動。 然而’為求卽省空間’家用冰箱會限制冷凝器本體和 風路之尺寸，同時常有因室内塵埃附著等而導致風路閉塞 之問題。 因此，已有省空間和考慮到塵埃附著問題之機械室之 設計揭露。 以下，配合參照圖式來說明習知冰箱。 第6圖係習知冰箱之機械室之橫截面圖，第7圖係沿第6 圖之A-A線截取之截面圖，第8圖係自底面觀看第6圖之機械 室之立體圖。 第6〜8圖中’ 51係冰箱，52係機械室，53係冷凝器，54 係風扇，55係壓縮機’而在位於冰箱51之下部之機械室52 自上風處起依序配置有冷凝器53、風扇54及壓縮機55。又， 56係用以將空氣吸入機械室52之空氣吸入口，57係用以將 在機械室52内進行熱交換之空氣排出之空氣吐出口，58係 用以連通空氣吸入口 56附近與空氣吐出口 57附近之連通 201202642 口。又’可使冰箱51沿前後移動之滾輪59，軸承於載置有 壓縮機55之基部60成可轉動之狀態。又，機械室52之背面， 覆蓋著防止塵埃和老鼠侵入之機械室遮罩61。 以下說明關於如上結構之習知冰箱之動作。 滾輪59位在包爽壓縮機55於其間之左右位置，亦在配 置在機械室52内且藉由機械室遮罩61覆蓋之位置，而近乎 長方形且高度170〜18〇Cm之冰箱51藉由滚輪59以及在冰箱 51下部位在前方之腳部及前部滚輪（未圖示）所支持。 先前技術文獻 專利文獻 【專利文獻1】日本專利公開公報2002 295954號 C發明内容】 發明概要 發明欲解決課題 然而，刖述習知結構，為求冰箱大容量化之大型化， 因應環保、因應節能之加速下之高隔熱材化造成重量增 加’以及精巧設相求衫量化，所以躲將料循環之 壓縮機和冷凝機等配置於冰箱上部，讓重心位置位於上 側’於是加狀在T方场料m輪洲㈣(未圖示) 之力就變得甚為可觀。X ’為促進節能，隔熱壁内係由真 空隔熱材等與-般發泡隔熱材以多層狀態構成，而由此種 隔熱壁形成隔熱箱體，所以真空隔熱材之重量更易造成負 載加諸於滾輪59。此外，滾輪59是配置靠機械室52之内側 之狀態，所以冰箱51設置時之穩定感降低，尤其是冰箱51 4 201202642 之左右方向之彎曲傾向增加，不穩定感也變大。 本發明係用以解決前述課題者，尤其目的在於提供一 種後部側滾輪位置配置於最佳位置，讓冰箱移動時或設置 時之穩定感增加之冰箱。 用以欲解決課題之手段 為解決前述課題，本發明之冰箱，係具有冰箱本體與 門者；及後部滾輪，係可使前述隔熱箱體沿前後方向移動 者，且前述後部滚輪配置在前述冰箱本體之下方且於左右 兩端部附近。 依此，可減少冰箱移動時或設置時冰箱之左右方向之 彎曲，提高強度及穩定感，且亦可降低冰箱之底面部，增 加内容積。 發明效果 本發明之冰箱，可提升當使用後部滾輪移動時或設置 時之冰箱之強度、穩定感，亦可增加内容積。 圖式簡單說明 第1圖係本發明之實施形態1之冰箱之機械室之縱截面 圖。 第2圖係本發明之實施形態1之冰箱之下部機械室之部 分截面圖。 第3圖係自第2圖之箭頭A觀看之立體圖。 第4圖係第3圖之分解立體圖。 第5圖係前述實施形態1之冰箱之背面下部之立體圖。 第6圖係習知冰箱之機械室之橫截面圖。 201202642 第7圖係沿第6圖A-A線截取之截面圖。 第8圖係沿第6圖B-B線截取之截面圖。 【赏施冷式】 用以實施發明之形離 第-態樣<發明係 一種冰箱，包含有隔熱箱體，係具 有冰相本體與門者；及後部滾輪，係可使前述隔熱箱體沿 前後方向移動者’由於前述後部餘配置在前述冰箱本體 之左右兩端部附近’所以可減少冰箱移動時或設置時冰箱 之左右方向之彎曲，提高穩定感，且亦可降低冰箱之底面 部，增加内容積。 第二態樣之發明係如第一態樣之發明，更包含有外 箱，係形成冰箱本體者，及補強板，係用以補強前述外箱 者，且由於冑述後部滾輪固定在前述補強板，所以該後部 滚輪以冰箱之左右寬度尺寸考量來設置，且位在補強板之 附近位置’因此可減少冰箱之左右方向之彎曲。 第三態樣之發明係如第二態樣之發明，其中前述後部 滚輪配置在較前述㈣板後方處，所以可降低冰箱本體之 底面部’增加内容積。 第四態樣之發明係如第一〜三態樣其中任一態樣之發 明’其#述後部滾輪具有滾輪構件；軸承構件，係轴承 該滚輪構件使其可轉動者；及切構件，係支持該轴承構 件者，且該支持構件藉-較機構固定在前述補強板，且 在較該固錢構後純置處配置有麻前賴輪構件之前 述軸承構件，如此以支持前述後部滾輪。 6 201202642 第五態樣之發明係如第一態樣之發明，其中前述冰箱 本體具有機械室，該機械室設有機械室板，該機械室板載 置有蒸發孤，用以蓄積產生於冰箱本體之後方下部構成冷 卻循環之壓縮機，或前述冰箱本體内之除霜水，且前述機 械室板固定在前述補強板，且前述後部滾輪軸承於前述機 械室板，所以所以可減少冰箱之左右方向之彎曲，以及增 加冰箱内容積。 以下，配合參照圖式以說明本發明之實施形態，其中 對於與習知例相同之結構賦與相同標號，其詳細說明則省 略。另，本發明非限於本實施形態。 (實施形態1) 第1圖係本發明之實施形態1之冰箱之機械室之縱截面 圖。第2圖係該實施形態1之冰箱之下部機械室之部分截面 圖。第3圖係自第2圖之箭頭A觀看之立體圖。第4圖係第3 圖之分解立體圖。第5圖係前述實施形態1之冰箱之背面下 部之立體圖。 第1圖中，11係冰箱，12係冰箱11之冰箱本體，13係設 置在冰箱本體12之背面上部之上部機械室，14係空冷凝 器，15係第1風扇，16係壓縮機。在上部機械室13自上風處 起依序配置有空冷凝器14、第1風扇15及壓縮機16,而藉著 驅動第1風扇15，可空氣冷卻空冷凝器14與壓縮機16。又， 冰箱11包含有冰箱本體12，及可自由開關冰箱本體12之前 面開口部之門（未圖示）。又，冰箱本體12係由發泡隔熱材（未 圖示)形成隔熱箱體41，該發泡隔熱材充填在構成外部輪廓 201202642 之外箱40與構成冰箱内内壁之内箱（未圖示）之間。 在此，第1風扇15安裝於風扇環17,且風扇環17將上部 機械室13内之風路劃分為第1風扇15之上風側與下風側。 又’空冷凝器14之上部形成有旁通風路18，該旁通風路18 可供被直接吸引至第1風扇15而不通過空冷凝器14之外氣 通過。另，旁通風路18係當空冷凝器14因塵埃附著等而閉 塞時可讓外氣直接供給至第1風扇15者，最好有相當於空冷 凝器14之約10〜15%之高度之5〜15mm之空間。若旁通風路 18之高度低於5mm(10%)，則當空冷凝器14完全閉塞時，風 量顯著減少，若旁通風路18之高度高於15mm(15%)，則通 過空冷凝器14之風量減少，無法獲得充分散熱功能。 又，19係設置在冰箱本體12之背面下部之下部機械 室，20係第2風扇，21係用以蓄積冰箱内（未圖示）之除霜水 之蒸發皿，22係設在冰箱本體12之背面角落部之連通風 路。下部機械室19自上風處起依序配置有蒸發皿21和第2風 扇20，藉著驅動第2風扇20，可吸入冰箱本體12之下部附近 之外氣以促進蓄積於蒸發皿2】之除霜水之蒸發，並且藉由 蒸發孤21與連通風路22將因除霜水蒸發而被冷卻之外氣供 給至空冷凝器14。第2風扇20之上風側設置蒸發皿21，藉此 可保持第2風扇20之吐出側之風阻較低，且藉著除霜水之蒸 發讓溫低較外氣低，所以可供給充分風量之空氣至空冷凝 器14，使散熱效率佳。又，如第2圖所示，在較下部機械室 遮罩24之下部吐出側格柵26上風側，設置第2風扇20及蒸發 m21，藉此自下部吐出側格栅26出來之空氣不會再度被吸 8 201202642 入第2風扇20，可抑制短流，所以供給充分風量之空氣至空 冷凝器14 ’使散熱效率佳。 於上部機械室13配置有為主要發熱源之壓縮機16及空 冷凝器14 ’所以第2風扇20吸入之冰箱本體12之下部附近之 外氣之溫度，會較冰箱本體12之上方之外氣低，所以下部 機械室19宜不設置主要發熱源，不過若僅靠第2風扇20之蒸 發促進效果，蒸發皿21内之除霜水無法充分蒸發，則亦可 於蒸發皿21内設置遠較空冷凝器14能力弱之小型散熱器 (未圖示）。 在此，連通風路22係於冰箱本體12之背面之縱邊之缺 口，若將冰箱11設置在系統廚具等有限空間而冰箱11之背 面與側面近接牆壁時，連通風路22遂成連通下部機械室19 與上部機械室13之風路。 在此’連通風路22之風路截面積，設成與吸入側背面 格柵33之風路之部分之截面積之總和大致相同之大小尺 寸。藉此，空氣可適當地被吸入經過連通風路22至上部機 械室内。 如第3圖所示，冰箱本體12之後方之左右兩端部附近固 定有後部滾輪44，該後部滾輪44使隔熱箱體41可沿前後方 向移動。 具體而言，於構成外箱4〇之側面板40a之後緣部40b及 下緣部40c之内壁’藉斂合 '螺固或熔接等方式固定有補強 板42 ’該補強板42用以維持外箱4〇之強度及最終之隔熱箱 體41之強度。 201202642 又’後部滾輪44包含有樹脂製滾輪構件44a、軸承構件 b係軸承滾輪構件44a使其可轉動者、及支持構件44c， 係供該軸承構件44b可貫穿滾輪構件44a之中心而構成且支 持°亥軸承構件44b之兩端，並藉固定機構45固定於冰箱本體 12者(參照第4_)。^而言之，支持構件44e-體形成有承接 軸承構件44b之軸承部44d，及藉固定機構45固定之固定部 44e。 固定部44e具有下部固定部44f，及自下部固定部44f朝 上方豎立形成之豎立固定部44g，軸承部44(ΐ則構成位在較 固定部44e後方處。 又，如第5圖所示，滾輪遮罩27設在連通風路22之下 部。該滾輪遮罩27係由有別於下部機械室遮罩24之另一構 件所構成，且螺固於冰箱本體12。又，滾輪遮罩27之高度 尺寸，配置成使滾輪遮罩27之上端較下部機械室遮罩24之 下端兩，且較設在下部機械室遮罩24之下部吐出側格栅25 之下4低。藉此，可自側面固持下部機械室遮罩24，並且 構成可促進自下部吐出側格柵25流入之空氣朝連通風路22 之風路。又，滾輪遮罩28與滾輪遮罩27同樣地，設在連通 風路22之下部，並且由有別於下部機械室遮罩24之另一構 件所構成，並螺固於冰箱本體12。 以下’說明如上所述結構之冰箱之動作及作用。 後部滾輪44藉由支持構件44c ’安裝於補強板42，該補 強板42安裝在外箱40之下側。又，補強板42與支持構件44c 之間’藉固定機構45固定。具體而言’補強板42配置在構 201202642 成外箱40之側面板40a之下緣部40c及後緣部40b之内壁，以 補強隔熱箱體41之結構。另一方面，支持構件44c具有固定 部44e ’而構成固定部44e之下部固定部44f藉固定機構45固 定在補強板42。又，配置從安裝在補強板42之後方端部之 下部固定部44沿外箱40之外面豎立之豎立固定部44g，藉固 定機構45固定在配置於後緣部4〇b之内壁以作補強之補強 板42。另，後緣部4〇b係配置成進入滾輪遮罩28内將滾輪遮 罩28包夾其間地配置於側面板4〇a之内壁。 後部滾輪44藉由沿側面板40a之角落部固定之支持構 件44c來安裝’所以於與冰箱丨丨之左右寬度尺寸大致相同之 間隔配置後部滾輪44。又，側面板40a之角落部之後方及下 方之至少一方，設有補強板42，所以支持冰箱11承受負載 之後部滾輪44，可減少冰箱移動時或設置時冰箱之左右方 向之彎曲’提高強度及穩定感，並且因減少彎曲情形，故 亦改善門扉之不平衡狀況。 又’後部滾輪44係藉支持構件44c配置在較配置於側面 板40a之角落部之補強板42後方，即較隔熱箱體41後方。由 於後部滾輪44配置在構成外箱40之底面板46與設置面之間 之空間區域以外處，所以可使底面板46下降，亦可增加貯 藏室之内容積。 又’本實施形態中’說明壓縮機16位在冰箱本體12之 上部之冰箱，不過如上所述配置之後部滾輪44亦可安裝在 具有機械室板47之機械室48之冰箱’該機械室板47載置有 於冰箱本體12之後方下部構成冷卻循環之壓縮機16，及用 201202642 以蓄積冰箱内產生之除霜水之蒸發皿21等者。具體而言， 機械室板47固定在補強板42，且機械室板47具有較補強板 42朝後方突出之突出部，滾輪構件44a亦可位在機械室板47 之兩端部而由前述凸出部直接軸承。藉此，可獲得相同作 用效果。 又’固定部44e與隔熱箱體41之間之固定，係下部固定 部44f與豎立固定部44g分別藉螺絲等之固定機構45固定， 不過亦可至少僅下部固定部44f藉固定機構45固定。即，由 於後部滾輪自側面板40a之後方沿側面板40a之角落部固 定，所以冰箱11之負載朝下加諸於下部固定部44f，且軸承 部44d配置在較下部固定部44f後方處，所以作用於豎立固 定部44g之應力’會以軸承部44d為支點而作用於側面板4〇a 之後緣部40b方向。因此，變成豎立固定部44g即使不藉固 定機構45亦可固定於補強板42之狀態。具體而言，僅藉由 例如形成在滾輪遮罩28内之肋構件等之限制機構（未圖示） 夾住以限制豎立固定部44g，遂可將豎立固定部44g固定於 補強板42。依此’可廢棄用以將豎立固定部44g直接固定在 補強板42之螺絲等固定機構45，改善遭滾輪遮罩28阻礙而 難以藉固定機構45固定之豎立固定部44g之固定作業。 如前所述’本發明之冰箱，由於後部滾輪44之位置配 置在大致吻合冰箱左右尺寸寬度之位置’所以可減少左右 方向之彎曲’提高冰箱移動時或設置時冰箱之穩定感。 產業上之玎利用性 依前述，本發明除適用於家用冰箱、業務用冰箱以外， 12 201202642 亦適用於自動販賣機等其他冷凍冷藏應用商品及貯藏箱。 L圖式簡單說明3 第1圖係本發明之實施形態1之冰箱之機械室之縱截面 圖。 第2圖係本發明之實施形態1之冰箱之下部機械室之部 分截面圖。 第3圖係自第2圖之箭頭A觀看之立體圖。 第4圖係第3圖之分解立體圖。 第5圖係前述實施形態1之冰箱之背面下部之立體圖。 第6圖係習知冰箱之機械室之橫截面圖。 第7圖係沿第6圖A-A線截取之截面圖。 第8圖係沿第6圖B-B線截取之截面圖。 【主要元件符號說明】 11...冰箱 22...連通風路 12...冰箱本體 24...下部機械室遮罩 13...上部機械室 25、26...下部吐出側格柵 14...空冷凝器 27...滾輪遮罩 15...第1風扇 28...滾輪遮罩 16...壓縮機 40...外箱 17...風扇環 40a...側面板 18...旁通風路 40b...後緣部 19...下部機械室 40c...下緣部 20...第2風扇 41...隔熱箱體 21···蒸發m 42...補強板 13 201202642 44...後部滾輪 51...冰箱 44a...滾輪構件 52...機械室 44b...軸承構件 53...冷凝器 44c...支持構件 54...風扇 44d...軸承部 55...壓縮機 44e.··固定部 56...空氣吸入口 44f...下部固定部 57...空氣吐出口 44g...豎立固定部 58...用以連通空氣吸入口 45...固定機構 59...滾輪 46...底面板 60...基部 47...機械室板 61...機械室遮罩 48...機械室 14201202642 VI. Description of the Invention: [Ming Hu Jin 4 Xuan Mussel] Field of the Invention The present invention relates to a refrigerator having a moving mechanism on the bottom surface, and the moving mechanism is disposed on the rear side of the bottom surface of the refrigerator. C. Prior Art 3 Background of the Invention A domestic refrigerator is constructed with rollers on the left and right sides of the bottom surface to allow the refrigerator to move back and forth. However, in order to save space, a domestic refrigerator limits the size of the condenser body and the air passage, and there is often a problem that the air passage is blocked due to adhesion of dust inside the room. Therefore, there has been a design of a mechanical room that saves space and takes into account dust adhesion problems. Hereinafter, a conventional refrigerator will be described with reference to the drawings. Fig. 6 is a cross-sectional view of a mechanical chamber of a conventional refrigerator, Fig. 7 is a cross-sectional view taken along line A-A of Fig. 6, and Fig. 8 is a perspective view of the mechanical chamber of Fig. 6 viewed from the bottom. In the 6th to 8th drawings, '51 series refrigerator, 52 series machine room, 53 series condenser, 54 series fan, 55 series compressor', and the machine room 52 located at the lower part of the refrigerator 51 is arranged in order from the wind up Condenser 53, fan 54, and compressor 55. Further, 56 is for sucking air into the air suction port of the machine room 52, 57 is for discharging the air for exchanging heat in the machine room 52, and 58 is for connecting the air inlet 56 to the air. The connection near the spout 57 is 201202642. Further, the roller 59, which allows the refrigerator 51 to move forward and backward, is rotatably mounted on the base 60 on which the compressor 55 is placed. Further, the back surface of the machine room 52 is covered with a machine room cover 61 for preventing dust and rat from entering. The operation of the conventional refrigerator with the above structure will be described below. The roller 59 is located at the left and right positions of the package compressor 55, and is also disposed in the machine room 52 and covered by the machine room cover 61, and the refrigerator 51 having a nearly rectangular shape and a height of 170 to 18 cm is used. The roller 59 and the lower portion of the refrigerator 51 are supported by the front foot portion and the front roller (not shown). CITATION LIST OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION In order to solve the problem, the conventional structure is designed to increase the capacity of the refrigerator, and to save energy and environmental protection. The acceleration of the high heat insulation material causes the weight increase 'and the precision of the phase to determine the size of the shirt, so the compressor and the condenser machine that hides the material circulation are placed in the upper part of the refrigerator, so that the center of gravity is located on the upper side. The force of the field material m-round (four) (not shown) becomes quite impressive. X ' is to promote energy saving, and the inside of the heat insulating wall is composed of a vacuum heat insulating material and the like, and the foaming heat insulating material is formed in a plurality of layers, and the heat insulating box is formed by the heat insulating wall, so the weight of the vacuum heat insulating material It is easier to cause the load to be applied to the roller 59. Further, since the roller 59 is disposed in the inner side of the machine room 52, the stability of the refrigerator 51 is lowered, and in particular, the bending tendency of the refrigerator 51 4 201202642 in the left-right direction is increased, and the sense of instability is also increased. The present invention has been made to solve the above problems, and it is an object of the invention to provide a refrigerator in which the rear side roller position is disposed at an optimum position and the stability of the refrigerator is increased when the refrigerator is moved or installed. In order to solve the above problems, the refrigerator of the present invention has a refrigerator main body and a door; and a rear roller that moves the heat insulating box in the front-rear direction, and the rear roller is disposed in the foregoing Below the refrigerator body and near the left and right ends. Accordingly, the bending of the refrigerator in the left-right direction during the movement of the refrigerator or during installation can be reduced, the strength and stability can be improved, and the bottom portion of the refrigerator can be lowered to increase the internal volume. EFFECT OF THE INVENTION The refrigerator of the present invention can improve the strength and stability of the refrigerator when the rear roller is moved or when it is set, and can also increase the internal volume. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a longitudinal sectional view showing a machine room of a refrigerator in accordance with a first embodiment of the present invention. Fig. 2 is a partial cross-sectional view showing the machine room of the lower portion of the refrigerator in the first embodiment of the present invention. Fig. 3 is a perspective view seen from arrow A of Fig. 2. Fig. 4 is an exploded perspective view of Fig. 3. Fig. 5 is a perspective view showing the lower portion of the back surface of the refrigerator of the first embodiment. Figure 6 is a cross-sectional view of a mechanical chamber of a conventional refrigerator. 201202642 Figure 7 is a cross-sectional view taken along line A-A of Figure 6. Fig. 8 is a cross-sectional view taken along line B-B of Fig. 6. [Appreciation of cold type] The invention is directed to the invention of the invention. The invention relates to a refrigerator comprising a heat insulating box body having an ice phase body and a door; and a rear roller for enabling the heat insulation When the cabinet moves in the front-rear direction, the rear portion is disposed near the left and right end portions of the refrigerator body, so that the bending of the refrigerator in the left-right direction during the movement of the refrigerator or during installation can be reduced, the stability is improved, and the refrigerator can be lowered. On the bottom side, increase the internal volume. The invention of the second aspect is the invention of the first aspect, further comprising an outer box, which is a body of the refrigerator, and a reinforcing plate, which is used for reinforcing the outer box, and the rear roller is fixed in the foregoing reinforcement The plate, so the rear roller is set in consideration of the left and right width dimensions of the refrigerator, and is located in the vicinity of the reinforcing plate', thereby reducing the bending of the refrigerator in the left and right direction. The invention of the second aspect is the invention of the second aspect, wherein the rear roller is disposed behind the (4) plate, so that the bottom portion of the refrigerator body can be lowered to increase the internal volume. The invention of the fourth aspect is the invention of any of the first to third aspects, wherein the rear roller has a roller member; the bearing member is a bearing for the roller member to be rotatable; and the cutting member is The support member is supported, and the support member is fixed to the reinforcing plate by a mechanism, and the bearing member of the pre-waist member is disposed at a position purely after the solid structure, so as to support the rear roller. 6 201202642 The fifth aspect of the invention is the invention according to the first aspect, wherein the refrigerator body has a mechanical chamber, and the mechanical chamber is provided with a mechanical chamber plate on which an evaporation orphan is placed for accumulating in the refrigerator. The lower part of the body constitutes a cooling cycle compressor, or the defrosting water in the refrigerator body, and the mechanical chamber plate is fixed to the reinforcing plate, and the rear roller bearing is in the mechanical chamber plate, so that the refrigerator can be reduced Bending the direction and increasing the internal volume of the refrigerator. In the following, the embodiments of the present invention will be described with reference to the drawings, wherein the same reference numerals are given to the same components as those in the prior art, and detailed description thereof will be omitted. Further, the present invention is not limited to the embodiment. (Embodiment 1) Fig. 1 is a longitudinal sectional view showing a machine room of a refrigerator according to Embodiment 1 of the present invention. Fig. 2 is a partial cross-sectional view showing the machine room of the lower portion of the refrigerator of the first embodiment. Fig. 3 is a perspective view seen from arrow A of Fig. 2. Fig. 4 is an exploded perspective view of Fig. 3. Fig. 5 is a perspective view showing the lower portion of the back surface of the refrigerator of the first embodiment. In the first drawing, the 11-series refrigerator, the refrigerator main body of the 12-series refrigerator 11, and the 13-series are provided in the upper machine compartment of the upper rear surface of the refrigerator main body 12, the 14-series air condenser, the 15th-stage first fan, and the 16-series compressor. The upper machine chamber 13 is provided with the empty condenser 14, the first fan 15, and the compressor 16 in this order from the windward side, and by driving the first fan 15, the air condenser 14 and the compressor 16 can be air-cooled. Further, the refrigerator 11 includes a refrigerator main body 12 and a door (not shown) that can open and close the opening of the front surface of the refrigerator main body 12. Further, the refrigerator main body 12 is formed of a foaming heat insulating material (not shown) to form a heat insulating box 41 which is filled in a box 40 which constitutes the outer contour 201202642 and an inner box constituting the inner wall of the refrigerator (not Between the illustrations). Here, the first fan 15 is attached to the fan ring 17, and the fan ring 17 divides the air passage in the upper machine room 13 into the wind side and the leeward side of the first fan 15. Further, a bypass air passage 18 is formed in the upper portion of the air condenser 14, and the bypass air passage 18 is directly attracted to the first fan 15 without passing through the air condenser 14. Further, the bypass air passage 18 allows the external air to be directly supplied to the first fan 15 when the air condenser 14 is closed due to adhesion of dust or the like, and preferably has a height corresponding to about 10 to 15% of the air condenser 14. ~15mm space. If the height of the bypass air passage 18 is less than 5 mm (10%), the air volume is significantly reduced when the air condenser 14 is completely occluded, and if the height of the bypass air passage 18 is higher than 15 mm (15%), the air condenser 14 is passed. The air volume is reduced and sufficient heat dissipation is not available. Further, the 19th system is installed in the lower machine lower part of the refrigerator main body 12, the 20th second fan, the 21st is used to accumulate the evaporating dish of the defrosted water in the refrigerator (not shown), and the 22 is provided in the refrigerator body 12. The connecting corner of the back corner is connected. The lower machine room 19 is provided with the evaporating dish 21 and the second fan 20 in this order from the windward position, and by driving the second fan 20, the air can be sucked out of the vicinity of the lower portion of the refrigerator main body 12 to promote accumulation in the evaporating dish 2] The defrosting water is evaporated, and the air is supplied to the empty condenser 14 by the evaporation of the solute 21 and the communication air passage 22 to be cooled by the defrosting water. The evaporating dish 21 is provided on the wind side of the second fan 20, whereby the wind resistance of the discharge side of the second fan 20 is kept low, and the temperature of the second fan 20 is lower than that of the outside air, so that a sufficient air volume can be supplied. The air to the air condenser 14 makes the heat dissipation efficient. Further, as shown in Fig. 2, the second fan 20 and the evaporation m21 are provided on the windward side of the discharge side grill 26 on the lower portion of the lower machine room cover 24, whereby the air from the lower discharge side grill 26 is not provided. It will be sucked again 8 201202642 into the second fan 20, which can suppress short-flow, so the supply of sufficient air volume to the air condenser 14' makes the heat dissipation efficiency good. In the upper machine room 13, the compressor 16 and the air condenser 14 which are the main heat sources are disposed. Therefore, the temperature of the gas outside the lower portion of the refrigerator body 12 sucked by the second fan 20 is higher than the air above the refrigerator body 12. Therefore, the lower machine room 19 is preferably not provided with a main heat source. However, if the defrosting water in the evaporating dish 21 cannot be sufficiently evaporated by the evaporation promoting effect of the second fan 20, it can be set in the evaporating dish 21. A small heat sink (not shown) with a weak capacity of the empty condenser 14. Here, the communication air passage 22 is a notch formed on the longitudinal side of the back surface of the refrigerator body 12. When the refrigerator 11 is placed in a limited space such as a system kitchen appliance and the back side and the side surface of the refrigerator 11 are adjacent to the wall, the communication air passage 22 is connected to the lower portion. The air path of the machine room 19 and the upper machine room 13. Here, the cross-sectional area of the air passage of the communication passage 22 is set to be substantially the same size as the total of the cross-sectional areas of the portions of the air passages of the suction-side rear grille 33. Thereby, air can be appropriately sucked through the communication air passage 22 to the upper mechanical chamber. As shown in Fig. 3, a rear roller 44 is fixed in the vicinity of the left and right end portions of the refrigerator body 12, and the rear roller 44 allows the heat insulating box 41 to move in the front and rear directions. Specifically, the reinforcing plate 42 is fixed to the inner wall of the rear edge portion 40b and the lower edge portion 40c of the side panel 40a constituting the outer casing 4a by a screwing or welding or the like. The strength of the box 4 and the strength of the final insulated box 41. 201202642 Further, the rear roller 44 includes a resin roller member 44a, a bearing member b-bearing roller member 44a rotatably, and a support member 44c. The bearing member 44b can be formed and supported by the center of the roller member 44a. The two ends of the bearing member 44b are fixed to the refrigerator body 12 by a fixing mechanism 45 (refer to 4_). In other words, the support member 44e-body is formed with a bearing portion 44d that receives the bearing member 44b, and a fixing portion 44e that is fixed by the fixing mechanism 45. The fixing portion 44e has a lower fixing portion 44f, and an upright fixing portion 44g which is formed upward from the lower fixing portion 44f, and the bearing portion 44 is formed to be located behind the fixed portion 44e. Further, as shown in Fig. 5, The roller cover 27 is disposed at a lower portion of the communication air passage 22. The roller cover 27 is formed of another member different from the lower machine room cover 24, and is screwed to the refrigerator body 12. Further, the roller cover 27 The height dimension is configured such that the upper end of the roller cover 27 is lower than the lower end of the lower machine room cover 24, and is lower than the lower portion of the lower machine room cover 24 below the discharge side grille 25. The lower machine room cover 24 is held from the side surface, and constitutes an air path that can promote the inflow of air from the lower discharge side grille 25 toward the communication air passage 22. Further, the roller cover 28 is provided in the same manner as the roller cover 27 The lower part of the air passage 22 is composed of another member different from the lower machine room cover 24, and is screwed to the refrigerator body 12. The following describes the action and function of the refrigerator constructed as described above. The rear roller 44 borrows Mounted to the reinforcing plate 42 by the support member 44c', The strong plate 42 is mounted on the lower side of the outer casing 40. Further, the reinforcing plate 42 and the supporting member 44c are fixed by the fixing mechanism 45. Specifically, the reinforcing plate 42 is disposed under the side panel 40a of the outer casing 40 of the 201202642 The inner wall of the edge portion 40c and the rear edge portion 40b reinforces the structure of the heat insulating box 41. On the other hand, the supporting member 44c has a fixing portion 44e', and the lower fixing portion 44f constituting the fixing portion 44e is fixed by the fixing mechanism 45. Further, the upright fixing portion 44g which is erected from the outer surface of the outer casing 40 after being fixed to the lower end portion of the reinforcing plate 42 is fixed to the inner wall of the rear edge portion 4b by the fixing mechanism 45. The reinforcing plate 42 is used as a reinforcing reinforcing plate 42. Further, the trailing edge portion 4〇b is disposed to enter the roller cover 28 to arrange the roller cover 28 therebetween to be disposed on the inner wall of the side panel 4〇a. The support member 44c to which the corner portion of the side panel 40a is fixed is attached. Therefore, the rear roller 44 is disposed at substantially the same width as the left and right width dimensions of the refrigerator 。. Further, at least one of the rear side and the lower side of the corner portion of the side panel 40a is provided. There is a reinforcing plate 42, so The refrigerator 11 is supported to bear the rear roller 44, which can reduce the bending of the refrigerator in the left and right direction when the refrigerator is moved or set. The strength and stability are improved, and the imbalance of the threshold is also improved due to the reduction of the bending condition. The 44-way support member 44c is disposed behind the reinforcing plate 42 disposed at the corner portion of the side panel 40a, that is, behind the heat insulating box 41. Since the rear roller 44 is disposed on the bottom panel 46 and the installation surface constituting the outer box 40, In addition to the space between the spaces, the bottom panel 46 can be lowered, and the internal volume of the storage compartment can be increased. In the present embodiment, the refrigerator 16 is illustrated in the refrigerator above the refrigerator body 12, but is configured as described above. The rear roller 44 can also be mounted in a refrigerator having a machine room 48 of a machine room plate 47. The machine room plate 47 is placed on the lower portion of the refrigerator body 12 to form a compressor 16 for cooling cycle, and 201202642 is used to accumulate the refrigerator. The evaporating dish 21 of the defrosting water produced, and the like. Specifically, the mechanical chamber plate 47 is fixed to the reinforcing plate 42, and the mechanical chamber plate 47 has a protruding portion that protrudes rearward from the reinforcing plate 42. The roller member 44a can also be positioned at both ends of the mechanical chamber plate 47 to be convex. Direct bearing. Thereby, the same effect can be obtained. Further, the fixing portion 44e and the heat insulating box 41 are fixed, and the lower fixing portion 44f and the vertical fixing portion 44g are respectively fixed by a fixing mechanism 45 such as a screw. However, at least only the lower fixing portion 44f may be fixed by the fixing mechanism 45. . That is, since the rear roller is fixed to the corner portion of the side panel 40a from the side panel 40a, the load of the refrigerator 11 is applied downward to the lower fixing portion 44f, and the bearing portion 44d is disposed behind the lower fixing portion 44f. The stress ' acting on the standing fixing portion 44g acts on the side edge portion 4b of the side panel 4A with the bearing portion 44d as a fulcrum. Therefore, the standing fixing portion 44g can be fixed to the reinforcing plate 42 without the fixing mechanism 45. Specifically, the upright fixing portion 44g can be fixed to the reinforcing plate 42 only by being restrained by a restricting mechanism (not shown) such as a rib member formed in the roller cover 28 to restrict the standing fixing portion 44g. According to this, the fixing mechanism 45 for fixing the upright fixing portion 44g directly to the reinforcing plate 42 can be discarded, and the fixing operation of the standing fixing portion 44g which is prevented by the roller cover 28 from being fixed by the fixing mechanism 45 can be improved. As described above, in the refrigerator of the present invention, since the position of the rear roller 44 is disposed at a position substantially conforming to the left and right width of the refrigerator, the bending in the left and right directions can be reduced, and the sense of stability of the refrigerator during the movement of the refrigerator or at the time of installation can be improved. INDUSTRIAL APPLICABILITY According to the above, the present invention is applicable not only to household refrigerators and business refrigerators, but also to other refrigeration and refrigeration application products and storage boxes such as vending machines. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a longitudinal sectional view showing a machine room of a refrigerator according to a first embodiment of the present invention. Fig. 2 is a partial cross-sectional view showing the machine room of the lower portion of the refrigerator in the first embodiment of the present invention. Fig. 3 is a perspective view seen from arrow A of Fig. 2. Fig. 4 is an exploded perspective view of Fig. 3. Fig. 5 is a perspective view showing the lower portion of the back surface of the refrigerator of the first embodiment. Figure 6 is a cross-sectional view of a mechanical chamber of a conventional refrigerator. Fig. 7 is a cross-sectional view taken along line A-A of Fig. 6. Fig. 8 is a cross-sectional view taken along line B-B of Fig. 6. [Description of main component symbols] 11... refrigerator 22... communication air passage 12... refrigerator main body 24... lower machine room cover 13... upper machine room 25, 26... lower discharge side compartment Grid 14...empty condenser 27...roller cover 15...first fan 28...roller cover 16...compressor 40...outer box 17...fan ring 40a.. Side panel 18...side air passage 40b...back edge portion 19...lower machine room 40c...lower edge portion 20...second fan 41...insulation box 21··· Evaporation m 42... Reinforcing plate 13 201202642 44... Rear roller 51... Refrigerator 44a... Roller member 52... Machine chamber 44b... Bearing member 53... Condenser 44c... Support Member 54...fan 44d...bearing portion 55...compressor 44e.·fixing portion 56...air suction port 44f...lower fixing portion 57...air outlet port 44g...erected The fixing portion 58 is configured to communicate with the air suction port 45... the fixing mechanism 59... the roller 46... the bottom panel 60... the base portion 47... the machine room panel 61... the machine room mask 48 ...machine room 14