312743 域 領 用 1利 {之 明上 N_· ' 五 本發明係關於一種店舖用冷凍裝置，特別是，關於一 種適用於如超級市場等在一台冷凍機連接小容量之5〜7 或展示櫃（冷藏櫃）者。 〔以往之技術〕 作爲將空冷式凝結器部設於屋外並將壓縮機設於屋內 之機械室，該壓縮機以反相器變更轉數俾仰制冷凍能力之 減少，實行容量之控制例子有記載於日本特開昭6 0 -175970號公報者。 在以往之冷凍裝置，大都使用反相器且在壓縮機使用 往復動之往復式，具有以下之課題。 1 )原來，壓縮機之旋轉扭矩之變動大，在低頻運轉 時則慣性力變少而具有失速，相反地成爲高頻運轉時，則 有壓縮機之吐出氣體溫度異常上昇，而在壓縮機內之吐出 閥及吸入閥作用有過大應力之情形。因此，無法充分對應 於廣範圍之容量下實行高精度極精細之運轉。 經濟部中央標準局員工消費合作社印製 (請先閲讀背面之注意事項再填寫本頁) 2)從壓縮機所吐出的高壓之吐出氣體之脈動較大， 而以反相器變化壓縮機之轉數時，則有更增幅脈動之情形 。因此，大都有在冷媒配管內所發生的冷媒氣體之流動聲 音及在配管本身之振動對策上通過冷媒配管之路徑及施工 方法之限制。 3 )壓縮機本身之振動及噪音大，將此以反相器變化 較數時，則更增幅振動及噪音。因此’對於機械室之構造 本紙張尺度逋用中國國家標準（CNS ) A4規格（210X297公釐) ~ 經濟部中央標準局員工消費合作社印裝 312V43 A7 ___ B7 五、發明説明（2 ) ’都市部對住宅地之設置，在晚上之運轉大都有限制。 〔發明之概要〕 本發明之目的係在於提供一種藉設置5〜7台複數小 型冷藏展示櫃而對於變動大之負載容量可實行隨著容量之 運轉，可得節省能量效果，可精細地控制成展示櫃內之溫 度變動成爲最小限度且可得到低噪音化，省空間化，對試 轉，服務，故障等之對應有利的店舖用於冷凍裝置。 爲了達成上述目的，本發明的店舖用冷凍裝置之第1 項特徵，係具有：設於店舖內且庫內溫度保持在2 °C左右 之至少三台以上的冷藏櫃，及設於店舖之後場且庫內溫度 保持在5 °C左右的工作榧，及設於近接配置在店舖之機械 室內的蝸旋形壓縮機及以反相器控制該壓縮機並予以驅動 所用的驅動裝置，及設於室外的熱交換器，及依次連接上 述冷藏櫃，工作櫃，蝸旋形壓縮機及室外熱交換器俾構成 冷凍循環的配管，及設於上述冷凍循環之室外熱交換器下 游側的受液器，及連接該受液器或其下游側與上述蝸旋形 壓縮機之壓縮動作室的液噴射配管，及設於該液噴射配管 且控制噴射量的流量控制閥，及隨著上述蝸旋形壓縮機之 吐出氣體之溫度來控制上述控制閥的控制器，及設於將冷 媒引導至上述各於冷藏櫃之各該配管的開閉閥等。 _ 、 又，較理想是上述店舖係一天中之2 / 3以上之時間 實行販賣活動的店舖。 又，較理想是上述控制器係控制流量控制閥使壓縮機 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 2S»7公釐） ----------装------、訂------章 (請先閲t背面之注意事項再填寫本頁) -5 - A7 B7 經濟部中央標準局貝工消費合作社印製 五'發明説明（3 ) 下游的冷媒過熱度成爲一定者》 又，較理想是上述噴射配管之一端係開口成在從上述 蝸旋形壓縮機之吐出口至餘面一捲以內之位置連通於壓縮 空間者。 又，較理想是上述冷藏櫃係在以3英呎寬度一個之冷 凍循環部連接5台以上之構成者》 又，較理想是以控制反相器驅動上述壓縮機的驅動裝 置係具有判斷反相器故障，並自動地切換成商用電源繼續 實行運轉的手段。 又，較理想是上述蝸旋形壓縮機之驅動裝置係具有隨 著吸入壓來控制轉數的手段，及固定轉數施以運轉的手段 » 又較理想是具有數位顯示冷凍裝置之運轉狀態（各 壓力，溫度，過熱度，轉數），停止理由，異常停止理由 的手段。 爲了達成上述目的，本發明的店舖用冷凍裝置之第2 項特徵，係設有在店舖內庫內溫度保持在2 °C左右之至少 三台以上的冷藏櫃，及庫內溫度保持在5 °C左右的工作櫃 的冷凍裝置，其特徵爲：與上述店舖近接，在設於屋內之 機械室內所設置的蝸旋形壓縮機，及設於上述蝸旋形壓縮 機之吸入側，檢測運轉吸入壓力的吸入壓力察覺器，及將 上述蝸旋形壓縮機藉由上述吸入壓力察覺器之數值來變萸 反相器之頻率俾控制轉數的手段，及設於屋外，依次以配 管連接上述冷藏櫃，工作櫃，蝸旋形壓縮機之空冷式凝結 器所構成的冷凍循環部，及設於上述冷凍循環部之上述空 本紙張尺度適用中@@家料（CNS ) A4· ( 21GX297公釐) ~~：'' -6 - ----------矣------ir (請先閲讀背面之注意事項再填寫本頁) 經濟部中央標率局負工消費合作社印製 A7 B7 五、發明説明（4 ) 冷式凝結器之下游側的受液器，及連接上述受液器內或其 下游側與上述蝸旋形壓縮機之壓縮空間的液噴射配管，及 設於上述液噴射配管目控制液噴射量的流量控制閥，及檢 測上述蝸旋形壓縮機之吐出氣體之溫度的吐出氣體熱敏電 阻，及檢測上述蝸旋形壓縮機之吐出側之壓力的高壓壓力 察覺器，及藉上述吐出氣體熱敏電阻與高壓壓力察覺器之 數值來控制上述流量控制閥之開度的手段，及設於將冷媒 引導至上述各冷藏榧之各該配管的電磁開閉閥等， 又，較理想是上述冷藏櫃係寬度爲大約1 m，在上述 冷凍循環部連接五台以上之構成者。 又，較理想是具有判斷上述反相器之故障的手段，及 藉上述判斷之手段判斷爲故障時，將上述蝸旋形壓縮機之 電源切換成商用電源而繼續實行運轉的手段者》 又，較理想是具有作爲運轉狀態至少數位顯示各部之 壓力，溫度，上述蝸旋形壓縮機之轉數的手段，及顯示停 止理由，異常停止理由的手段者。 爲了達成上述目的，本發明的店舖用冷凍裝置之第3 項特徵’係具有：設於機械室內的冷凍機本體，及藉反相 器控制轉數，且控制液噴射量的蝸旋形壓縮機，及至少三 台以上的冷藏櫃，及工作櫃，及將冷媒引導至上述冷藏櫃 的配管，及將上述冷藏櫃裝卸自如於配管的開閉閥者。、 依照上述之本發明，具有以下之作用： 1 )將蝸旋形壓縮機使用在冷凍裝置，因旋轉扭矩之 變動較小，即使成爲低頻運轉也不會失速，而成爲高頻運 本紙張尺度適用中國國家標準（CNS ) A4規格（210Χ297公釐） (請先閲讀背面之注意事項再填寫本頁) 訂 唆 -7 - 經濟部中央標準局員工消費合作社印製 31S743 A7 B7 五、發明説明（5 ) 轉也不會勉強，成爲在廣範圍控制穩定之容量，又，檢測 運轉吸入壓力，變更反相器之頻率來控制壓縮機之轉數而 廣範圍地變動之容量且成爲高精度極精細之運轉。又因將 原來扭矩變動小之壓縮機設在專用之機械室，而以反相器 變更轉數，因此可減低整體冷凍裝置之振動及噪音，而且 也可減小從壓縮機所吐出之高壓氣體之脈動而也可減小在 冷媒配管內所發生之冷媒氣體的流動聲音及配管本身之振 動，而也減少經過冷媒配管之路徑及施工方法之限制。又 ，因檢測吐出氣體之溫度與壓力，控制對壓縮機之壓縮空 間的液噴射量，且將噴射冷媒液之位置作爲連通於蝸旋形 壓縮之吐出口的壓縮空間，因此，不會減少來自壓縮機之 吸入側的冷媒氣體的吸入量，仍維冷凍容量之狀態下直到 高運轉頻率爲止，可得到不會過熱而安定的吐出氣體溫度 0 2 )由於具備判斷反相器之故障的手段，及藉由判斷 手段判斷爲故障時，將蝸旋形壓縮機之電源切換成商用電 源而繼續實行運轉的手段，因此，反相器故障時，則自動 地切換成商用電源，雖未能實行極精細之控制溫度惟可實 行需要最低限度之冷凍動作，可避免對展示榧內之保管品 之不良影響。 3)由於在蝸旋形壓縮機之驅動裝置設置頻率固定之 運轉，因此，可將調整試行運轉時之膨脹閥，封入冷媒等 之服務，與以通常之吸入壓力將運轉頻率成爲可變之運轉 相比較可容易地實行。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X207公釐） ---------f------IT------.^- (請先閲讀背面之注意事項再填寫本頁) ~ 8 ~ A7 B7 五、發明説明（6 ) 4 )藉實行運轉狀態之各顯示，可定期地檢驗冷凍裝 置，可將故障防範於未然，又藉由顯示異常停止理由等’ 可容易確認運轉範圍是否適當。 本發明之其他特徵與目的及利益參照所附圖式的以T 說明將可更明瞭。 〔實施例〕 本發明之基本上想法係如下所述， 1 )壓縮機係採用沒有往復動之蝸旋形式，檢測運轉 吸入壓力，變更反相器之頻率，控制壓縮機之較數施行驅 動，且設置於專用之機械室。 2)隨著蝸旋形壓縮機之吐出氣體之溫度與壓力值來 控制液噴射量，噴射冷媒液之位置係作爲在蝸旋形壓縮機 之旋迴蝸旋形之一旋迴運動中一度與吐出口相連通之接近 吐出口的壓縮空間。 3 )判斷反相器之溫度上昇至異常等之故障，故障時 係切換成商用電源。 經濟部中央標準局貝工消費合作社印裝 (請先閱讀背面之注意事項再填寫本頁) 4)設置固定轉數施以運轉之模態。 5 )作爲運轉狀態至少數位顯示各部之壓力，溫度， 上述蝸旋形壓縮機之較數，又，顯示停止運轉之理由及異 常停止理由。 、 以下，依照圖示說明本發明之具體實施例。 第1圖係表示從安裝關係觀看之店舖用冷凍裝置之整 體配置的平面圖，第2圖係表示相同的側面圖，第3圖係 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -9 一 312743 A7 B7 經濟部中央標準局員工消費合作社印製 五、發明説明（7 ) 1 I 表示 從控制關 係 所 觀 看 之 冷 凍 循 環 部 之 構 成 的 方 塊 圖 〇 1 1 設於店內 1 之 冷 藏 櫃 2 係 放 進 所 販 賣 之 物 品 > 該 庫 1 1 內溫 度係保持 在 2 X 左 右 » 寬 度 爲 大 約 1 m 設 置 6 台 0 1 I 請 1 | 在店舖之 後 場 設 有 放 進 物 品 j 人 可 進 入 其 中 的 工 作 先 閱 1 1 讀 1 1 櫃3 ，庫內溫 度 保 持 在 5 °C 左 右 〇 又 1 冷 藏 櫃 2 係 至 少 連 背 接三 台以上， 又 > 一 天 中 至 少 2 / 3 以 上 之 時 間 ( 例 如 7 之 注 素 1 點至 2 3點） 實 行 販 賣 活 動 俾 運 轉 冷 凍 裝 置 係 在 效 率 上 較 項 再 1 填 理想 〇 寫 本 X 4係近接 地 設 在 店 舖 的 機 械 室 > 設 有 具 備 蝸 旋 形 壓 縮 育 1 1 機1 0及以反 相 器 控 制 該 壓 縮 機 施 以 驅 動 所 用 之 驅 動 裝 置 1 1 .20 0等的蝸 旋 形 冷 凍 機 1 0 0 〇 2 0 係 設 於 屋 外 之 空 冷 1 1 式凝 結器。藉 將 原 來 扭 矩 變 動 小 之 蝸 旋 形 壓 縮 機 1 0 又 設 訂 I 於機 械室4， 可 減 低 向 外 部 之 噪 音 而 且 考 慮 可 容 易 施 行 1 I 維修 0 1 1 | 冷凍循環 部 係 依 次 連 接 冷 藏 榧 2 X 作 櫃 3 蓄 壓 器 1 1 後 6 0 ，蝸旋形 壓 縮 機 1 0 空 冷 式 凝 結 器 2 0 設 於 空 冷 1 式凝 結器2 0 之 下 游 側 的 受 液 器 3 0 所 構 成 9 受 液 器 3 0 1 1 內或 其下游側 與 蝸 旋 形 壓 縮 機 1 0 之 壓 縮 rt?t. 動 作 室 ( 未 予 圖 示） ，係以液 噴 射 配 管 8 5 相 連 接 〇 又 9 在 液 噴 射 配 管 | 8 5 設有控制 對 蝸 旋 形 壓 縮 機 1 0 之 液 噴 射 量 的 流 量 控 制 Ί 1 閥8 0 ，及設 有 在 停 止 蝸 旋 形 壓 縮 機 1 0 時 及 斷 電 時 成 爲 1 1 | 閉路 的電磁閥 7 0 0 1 1 1 在如上所 配 置 之 冷 凍 裝 置 及 所 稱 成 之 冷 凍 循 環 部 在 1 1 冷藏 櫃2及工 作 櫃 3 所 蒸 發 之 低 溫 低 壓 的 冷 媒 氣 BUUt 體 係 經 era, 過 1 1 本紙張尺度適用中國國家標準（CNS )八4規格（210X297公釐） -10 - 經濟部中央標準局貝工消費合作社印製 312743 A7 B7 五、發明説明（8 ) 設於機械室4內之蓄壓器6 0，而在蝸旋形壓縮機1 〇被 壓縮成高溫高壓之冷媒氣體。此時，從蝸旋形壓縮機1 〇 所吐出之高壓氣體的脈動也減小，而在配管內所發生之冷 媒氣體的流動聲音及配管本身之振動也可減小。然後’冷 媒氣體係在設於屋外之空冷式凝結器2 0被凝結成冷媒液 ，而暫時被儲在受液器3 0。然後，經冷媒液之配管3 3 ，經由電磁開閉閥3 5及膨脹閥3 6而成爲再進入蒸發器 之冷藏榧2及工作櫃3的循環系統，發生冷氣。 以下，依照第4圖之流程圖說明第3圖的冷凍循環部 之吸入壓之控制動作的概要。將壓縮機之能力作爲一定時 ，若在蒸發器所要求之負載變大，亦即在冷藏榧2及工作 櫃3中上昇溫度時，則壓縮機之運轉中的吸入壓力變高， 相反地，若變成過冷卻而負載變小，則吸入壓力變低。因 此檢測該吸入壓力而變更壓縮機之轉數，則可實行隨著負 載變化冷凍機之冷卻能力的控制容量之運轉。 由吸入壓力察覺器9 1所檢測的運轉吸入壓力係被輸 入在控制器20 1 (步驟40 1)，在此與事先設定之設 定壓力值（P s b )具有設定壓力差（ΛΡ s )之容許範 圍相比較（步驟403)，若該值以上，亦即在（A)帶 ’則增加運轉頻率而向反相器2 0 2輸出運轉頻率之指令 (步驟405)。但是，該頻率之上限係作爲80Hz ( 步驟404 ，406 ).。如此，反相器202係製作依控 制器2 0 1所指令的頻率之電源，供給於蝸旋形壓縮機 1 0控制成可增加轉數。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） _ ' -11 - ----------1------ir------ (請先聞讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作杜印裝 A7 _______B7五、發明説明（9 ) 相反地’若事先設定之設定壓力值（Psb)以下， 亦即，在（C )帶，則降低運轉頻率（步驟4 〇 9 )。但 是，該頻率之下限係作爲20Hz (步驟4 0 8，40 6 )，若運轉吸入壓力在容許範圍，亦即在（B )帶時，則 維持該時之頻率（步驟4 0 6 )。在此事先設定之設定壓 力值（Psb)與設定壓力值（APs)，係將設有該時 之冷藏櫃2及工作榧3的店舖內之溫度或設有空冷式凝結 器2 〇的屋外之溫度等加以檢測而自動地變化，由此，可 成爲環境有變化之一年中間成爲安定之效率優異的運轉。 以下，說明第2圖的冷凍循環部之吐出氣體之控制溫 度。 搭載蝸旋形壓縮機1 0之冷凍機，係因在吐出側保有 油，因此，某些程度過熱乃維持油之粘度上所必須，若吐 出壓力一定，則僅控制吐出氣體之溫度即可以。但是，因 吐出壓力係隨運轉壓力。運轉頻率，外氣溫度而變化，因 此在此時也必須儘量控制溫度成較低而不會過熱。故，控 制器2 0 1係算出由吐出氣體熱敏電阻（溫度檢測器）所 檢出的吐出氣體之溫度，及以高壓壓力察覺器9 2所檢出 的壓力之關係所決定的冷媒之過熱度*如此，藉該過熱度 ，變更流量控制閥8 0之開度，並藉控制對蝸旋形壓縮機 1 0之噴射冷媒液之量（液噴射量），在過熱時，增加液 噴射量而不必減少冷凍能力，經常控制在適當溫度而降低 吐出氣體之溫度。由此作爲冷媒也不必使用特定氟利昂而 可使用特定氟利昂以外之氟利昂2 2。 (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4规格（210X297公釐） -12 - 經濟部中央標準局員工消費合作社印31 A7 _B7_五、發明説明（10 ) 第8圖係表示在蝸旋形壓縮機1〇之內部噴射冷媒液 所用的蝸旋形餘面之細孔位置的圖式，冷媒液之注入用細 孔1 4 1 a係設於從固定蝸旋形外殼1 1 0之開始捲繞端 一捲以內（在漸開線角度2 τ以內）之近接於固定蝸旋形 外殼外周的端板1 1 5。又，在近接於從細孔1 4 1 a前 進2 ；r之位置的蝸旋形外殼1 1 0之內周的位置之端板也 設有注入用細孔1 4 1 b，細孔藉作成這種位置，冷媒液 係在旋迴蝸旋形111之1旋迴運動中有噴射一次連通於 吐出孔口 102之空間121a ，121b，因而可避免 冷媒之過度的液壓縮，可避免減少冷凍能力。 又，同樣地藉算出以吸入氣體熱敏電阻9 3所檢測之 吸入氣體的溫度與運轉吸入壓力之關係所決定的吸入氣體 之過熱度，可防止濕潤壓縮，或可發出警報。 由上可知，吐出側及吸入側之過熱度係若決定冷媒之 種類即可由壓力與溫度決定，惟若冷媒之種類不相同則雖 相同溫度，壓力，過熱度也不相同。故在控制器2 Ο 1事 先輸入數種冷媒之物性值俾即使冷媒之種類不相同也可算 出正確之過熱度，並以外部之開關等之設定器可選擇該數 值。藉此，即使冷媒之種類不相同也可控制正確之過熱度 〇 在第5圖說明即使反相器有故障也可繼續實行運轉之 方法。 反相器2 0 2係在正常時，關閉電磁接觸器2 0 3與 電磁接觸器2 0 4，則電源通電於蝸旋形壓縮機1 〇用之 (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度通用中國國家標準（CNS ) A4規格（210X297公釐> -13 - 經濟部中央標隼局員工消費合作社印裝 A7 B7__五、發明説明（11 ) 電動機並被控制。反相器2 0 2之溫度有異常上昇等時， 則由反相器2 0 2本身將異常信號發送至控制器2 0 1 ， 或是以設於反相器2 0 2之二次側的電流檢出器2 0 1檢 測’即使控制器2 0 1將運轉指令輸出至反相器2 0 2而 在電流檢測器2 0 1未能檢測時等，則判斷爲故障，打開 電磁接觸器2 0 3與電磁接觸器2 0 4，關閉電磁接觸器 2 0 5 ，使商用電源直接通電至蝸旋形壓縮機10用之電 動機。結果，即使未實行控制運轉也可至少避免停止運轉 〇 第6圖係在冷凍裝置1 0 0表示蝸旋形壓縮機1 〇之 周邊部，在冷凍裝置1 0 0係在內藏反相器2 0 2 *控制 器201 ，‘電磁接觸器203，204，205及電流檢 測器2 0 6等之電裝箱（驅動裝置）2 0 0具備數位顯示 面板2 0 7。 第7圖係表示數位顯示面板2 0 7之詳細；作爲數位 顯示項目設有碼2 0 8，資料2 0 9及顯示項目的選擇鍵 2 1 0 »操作選擇鍵2 1 0可用資料2 0 9以數值顯示運 轉狀態（設定壓力，吐出壓力，吸入壓力等之各壓力，吐 出氣體溫度，吸入氣體溫度，店舖內溫度，屋外溫度等之 各溫度’吐出氣體冷媒過熱度，吸入氣體冷媒過熱度等之 各過熱度，其他，運轉頻率，運轉電流等）。成爲異常狀 態時，具有點亮異常燈2 1 1 ，此時之停止理由的碼及在 保護裝置動作等而停止時可知有那一保護裝置施以動作而 保持異常停止時之運轉狀態的功能等》 I-----------/------訂------^ I (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） ' 14 - A 7 ___B7___ 五、發明説明（12 ) 〔發明之效果〕 依照本發明，設置複數小型冷藏展示櫃時，在店舖內 之改裝及陳列品之變化等上即使展示櫃之連接台數及保存 溫度有很大變化也對於其負載可隨著容量施行運轉，而在 一年期間冷凍機之運轉中的吸入壓力經常成爲一定而可得 到省能量效果。又，可精細控制成將展示櫃內之溫度變動 成爲最小限度，展示櫃內之保管溫度穩定，可得到保管品 之高鮮度化。又，將原來扭矩變動少的蝸旋形壓縮機配置 在機械室即可實現低噪音，省空間，又對於試行運轉或服 務，故障時之對應及顯示等也可得到有利的店舖用冷凍裝 置》 〔圖式之簡單說明〕 第1圖係表示本發明的店舖用冷凍裝置之一實施例之 整體配置的平面圖。 第2圖係表示本發明的一實施例之整體配置的側面圖 經濟部中央標準局員工消費合作社印製 (請先閲讀背面之注意事項再填寫本頁) 〇 第3圖係表示本發明的一實施例之冷凍循環部之構成 的方塊圖。 第4圖係表示本發明的一實施例之冷凍循環部之吸入 壓之控制動作之概要的流程圖。 第5圖係表示在本發明的一實施例說明反相器故障時 之繼續施行運轉方法的方塊圖》 氏張尺度適用中國囤家標準（CNS ) A4規格（2丨0X297公釐)~~i ~ ' 15 - 312743 A7 B7 五、發明説明（13 ) 第6圖係表示本發明的一實施例之蝸旋形壓縮機之週 邊機器的側面圖。 第7圖係表示本發明的一實施例之顯示面板之詳細的 正面圖。 第8圖係表示本發明的一實施例之蝸旋形壓縮機之內 部，蝸旋形外殼之嚙合狀態及噴射冷媒液所用之蝸旋形外 殼及細孔位置之關係的剖面圖。 (請先閱讀背面之注意事項再填寫本頁) 訂 線！ 經濟部中央標準局貝工消費合作杜印裝 本紙張尺度適用中國國家標準（CNS ) A4规格（210X297公釐） -16 -312743 The domain uses 1 profit. {明明 N_ · '5. The present invention relates to a store freezing device, in particular, it is suitable for connecting a small capacity 5 ~ 7 or display cabinet such as a supermarket to a freezer. (Refrigerator). [Conventional technology] As an example of a mechanical room where an air-cooled condenser is installed outside the house and a compressor is installed inside the house, the compressor changes the number of revolutions with an inverter to reduce the cooling capacity of the elevator, and implement an example of capacity control It is described in Japanese Unexamined Patent Publication No. 60-175970. In the conventional refrigerating apparatuses, the reciprocating type which uses an inverter and uses the reciprocating motion in the compressor has the following problems. 1) Originally, the rotation torque of the compressor fluctuated greatly. During low-frequency operation, the inertial force decreased and stalled. On the contrary, when the high-frequency operation was performed, the temperature of the discharged gas of the compressor abnormally increased, and the compressor Excessive stress on the discharge valve and suction valve. Therefore, high-precision and extremely-fine operation cannot be performed in a wide range of capacities. Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs (please read the precautions on the back before filling in this page) 2) The high-pressure gas emitted from the compressor pulsates greatly, and the inverter changes the compressor rotation When counting, there will be more pulsation. Therefore, there are many restrictions on the flow sound of the refrigerant gas generated in the refrigerant piping and the path and construction method of the refrigerant piping through the refrigerant piping. 3) The vibration and noise of the compressor itself are large. When this is compared with the inverter, the vibration and noise will be more amplified. Therefore, for the structure of the machine room, the paper standard adopts the Chinese National Standard (CNS) A4 specification (210X297 mm) ~ printed by the Central Bureau of Standards of the Ministry of Economic Affairs Employee Consumer Cooperative 312V43 A7 ___ B7 V. Description of the invention (2) There are restrictions on the setting of residential areas at night. [Summary of the invention] The object of the present invention is to provide a 5 to 7 sets of multiple small refrigerated display cabinets that can be operated with the capacity for large changes in load capacity, energy saving effect can be obtained, and fine control can be achieved. The temperature fluctuation in the display cabinet is minimized and the noise can be reduced and the space can be saved. Stores that are beneficial to test transfers, services, failures, etc. are used in the refrigeration equipment. In order to achieve the above object, the first feature of the store freezing device of the present invention includes: at least three or more refrigerators installed in the store and the temperature in the store kept at about 2 ° C, and installed in the back of the store The working temperature is maintained at about 5 ° C, and the scroll compressor installed in the mechanical room of the store and the drive device used to control and drive the compressor with an inverter are provided in The outdoor heat exchanger, and the piping connecting the refrigerator, the work cabinet, the scroll compressor and the outdoor heat exchanger in sequence to form the refrigeration cycle, and the liquid receiver provided on the downstream side of the outdoor heat exchanger of the refrigeration cycle , And a liquid injection pipe connecting the liquid receiver or its downstream side to the compression operation chamber of the scroll compressor, and a flow control valve provided in the liquid injection pipe and controlling the injection amount, and following the spiral shape A controller that controls the above-mentioned control valve by the temperature of the gas discharged from the compressor, and an on-off valve and the like provided for guiding the refrigerant to each of the pipes in the refrigerator. _, Furthermore, it is more desirable that the above-mentioned store is a store that carries out sales activities for more than two-thirds of the day. Moreover, it is more ideal that the above controller is to control the flow control valve so that the paper standard of the compressor is applicable to the Chinese National Standard (CNS) A4 specification (210 X 2S »7mm) ---------- ---- 、 Subscribe ------ Chapter (please read the notes on the back of t before filling out this page) -5-A7 B7 Printed 5 'Invention Instructions printed by Beigong Consumer Cooperative of Central Bureau of Standards of the Ministry of Economic Affairs (3) The downstream superheat of the refrigerant becomes constant. It is also preferable that one end of the injection pipe is opened so as to communicate with the compression space at a position within one roll from the discharge port of the scroll compressor. Moreover, it is more preferable that the refrigerator is connected to more than 5 units in a refrigeration cycle unit with a width of 3 feet. Furthermore, it is more preferable that the drive device that controls the inverter to drive the compressor has a judgment phase Device failure, and automatically switched to a commercial power supply to continue to operate means. Furthermore, it is more preferable that the drive device of the scroll compressor described above has a means for controlling the rotation speed in accordance with the suction pressure, and a means for operating the fixed rotation speed »It is also more preferable to have a digital display of the operating state of the freezing device ( Various pressures, temperatures, superheats, revolutions), reasons for stopping, and means for reasons for abnormal stopping. In order to achieve the above object, the second feature of the store freezing device of the present invention is to provide at least three or more refrigerators that maintain a temperature in the store of about 2 ° C, and the temperature of the store is kept at 5 ° The freezer of the working cabinet around C is characterized in that it is close to the above-mentioned shop, a scroll compressor installed in the machine room installed inside the house, and a suction side of the scroll compressor installed to detect the operation A suction pressure sensor for the suction pressure, and a means for changing the frequency of the inverter by the value of the suction pressure sensor to control the number of revolutions of the scroll compressor, and it is installed outside the house, and the pipes are connected to the above in sequence Refrigerators, work cabinets, air-cooled condensers composed of air-cooled condensers of scroll compressors, and the above-mentioned empty paper standards set in the above-mentioned refrigeration cycle are applicable to @@ 家 料 （CNS） A4 · (21GX297 公%) ~~: '' -6----------- 韣 ------ ir (Please read the notes on the back before filling this page) Printed by cooperatives A7 B7 V. Description of invention (4) Cold condenser A liquid receiver on the downstream side, a liquid injection pipe connecting the inside of the liquid receiver or the downstream side thereof with the compression space of the scroll compressor, and a flow control valve provided in the liquid injection pipe to control the amount of liquid injection, And a discharge gas thermistor that detects the temperature of the discharge gas of the scroll compressor, and a high-pressure pressure sensor that detects the pressure on the discharge side of the scroll compressor, and the discharge gas thermistor and high pressure The means for controlling the opening of the flow control valve by the value of the sensor, and the electromagnetic opening and closing valve provided in the piping that guides the refrigerant to each of the refrigerators, and more preferably, the width of the refrigerator is about 1 m, connected more than five units in the refrigeration cycle unit. Furthermore, it is more preferable to have a means to determine the failure of the inverter, and when it is determined to be a failure by the means of the determination, to switch the power supply of the scroll compressor to a commercial power supply and continue the operation. It is preferable to have a means for displaying at least the pressure and temperature of each part as the operating state at least in digits, and the means for displaying the reason for stopping and the reason for abnormal stopping. In order to achieve the above object, the third feature of the store refrigeration device of the present invention includes a refrigerator body provided in a machine room, and a scroll compressor that controls the number of revolutions by an inverter and controls the amount of liquid injection , And at least three or more refrigerators, and work cabinets, and piping that guides the refrigerant to the refrigerator, and an on-off valve that allows the refrigerator to be mounted and unloaded freely on the piping. , According to the present invention described above, it has the following effects: 1) When the scroll compressor is used in a refrigeration device, due to the small change in rotational torque, it will not stall even if it is operated at a low frequency, and becomes a high-frequency paper standard Applicable to China National Standard (CNS) A4 specification (210Χ297mm) (please read the precautions on the back before filling in this page) 唆 -7-31S743 A7 B7 printed by the employee consumer cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 5) The rotation will not be forced, and it will become a stable capacity in a wide range of control. Also, it will detect the operating suction pressure and change the frequency of the inverter to control the number of revolutions of the compressor. Run. Since the compressor with small torque variation is installed in a dedicated machine room, and the rotation speed is changed with an inverter, the vibration and noise of the overall refrigeration device can be reduced, and the high-pressure gas discharged from the compressor can also be reduced The pulsation can also reduce the flow sound of the refrigerant gas generated in the refrigerant piping and the vibration of the piping itself, and also reduce the restrictions on the path and construction method through the refrigerant piping. In addition, because the temperature and pressure of the discharged gas are detected, the amount of liquid injected into the compression space of the compressor is controlled, and the position where the refrigerant liquid is injected is used as the compression space that communicates with the discharge port of the spiral compression. The suction volume of the refrigerant gas on the suction side of the compressor is still maintained at the freezing capacity up to a high operating frequency, and the stable discharge gas temperature can be obtained without overheating. 2) Because of the means for judging the failure of the inverter, And means to switch the power supply of the scroll compressor to commercial power supply and continue to operate when it is determined to be a failure by the judging means, therefore, when the inverter fails, it is automatically switched to commercial power supply, although the Fine temperature control can only implement the minimum freezing action, which can avoid the adverse effects on the storage products in the display. 3) Since the drive of the scroll compressor is provided with a fixed frequency operation, the expansion valve during the trial operation can be adjusted, and the service such as refrigerant can be enclosed, and the operation can be changed to the operation frequency with the normal suction pressure. It can be easily implemented in comparison. This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X207mm) --------- f ------ IT ------. ^-(Please read the note on the back first Please fill in this page for details) ~ 8 ~ A7 B7 V. Description of the invention (6) 4) By performing the display of the operating status, the freezing device can be regularly inspected, the failure can be prevented before it is displayed, and the reason for the abnormal stop is displayed, etc. 'It is easy to confirm whether the operating range is appropriate. Other features, objects, and benefits of the present invention will be more apparent with reference to the description in the accompanying drawings in T. [Embodiment] The basic idea of the present invention is as follows, 1) The compressor adopts a scroll type without reciprocating motion, detects the operating suction pressure, changes the frequency of the inverter, and controls the operation of the compressor. And set in a dedicated mechanical room. 2) With the temperature and pressure of the gas discharged from the scroll compressor to control the amount of liquid injection, the position of the injected refrigerant liquid is used as a degree of rotation in one of the spiral movements of the spiral compressor of the scroll compressor. The discharge port is connected to the compression space close to the discharge port. 3) Judging the temperature rise of the inverter to abnormality and other faults, the fault is switched to commercial power supply. Printed by the Beigong Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs (please read the precautions on the back before filling in this page) 4) Set a fixed number of revolutions to run. 5) As the operating state, at least digitally display the pressure and temperature of each part, the comparison of the above scroll compressor, and the reason for stopping the operation and the reason for abnormal stopping. In the following, specific embodiments of the present invention will be described in accordance with the drawings. Figure 1 is a plan view showing the overall configuration of the store's freezing device viewed from the installation relationship, Figure 2 is the same side view, and Figure 3 is the paper standard applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm ) -9 1 312743 A7 B7 Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy 5. Description of invention (7) 1 I shows the block diagram of the composition of the refrigeration cycle department viewed from the control relationship. Refrigerator 2 is for putting in the items to be sold > The temperature in the store 1 1 is kept at about 2 X »Width is about 1 m. Set 6 units 0 1 I Please 1 | There are j people in the back of the store The work that can be entered first is read 1 1 read 1 1 cabinet 3, the temperature in the storage is kept at about 5 ° C. Refrigerator 2 is connected to at least three or more, and> 2/3 of at least one day Time (e.g. 7 primes 1 point to 2 3 Point) Carry out the sales activities to operate the refrigeration system, and compare the efficiency in terms of 1 and then fill in the ideal. The copybook X 4 series is located near the machine room of the store.> Equipped with a scroll-shaped compression machine 1 1 machine 1 0 and reverse The phaser controls the compressor to drive the used drive device 1 1.20 0, etc. scroll refrigerator 100 0 0 2 0 is an air-cooled 1 1 condenser installed outside the house. By setting the original scroll compressor 1 0 with small torque variation to the machine room 4, I can reduce the noise to the outside and consider that it can be easily implemented. 1 I Maintenance 0 1 1 | The refrigeration cycle unit is connected to the refrigerator 2 in sequence. X Work cabinet 3 Accumulator 1 1 Rear 6 0, scroll compressor 1 0 Air-cooled condenser 2 0 Receiver 3 0 located downstream of the air-cooled 1 condenser 2 0 constitutes 9 Receiver 3 0 1 1 or the downstream side of the compressor rt? T. Compression rt? T. The operating chamber (not shown), is connected to the liquid injection pipe 8 5 5 〇 9 9 in the liquid injection pipe | 8 5 Equipped with a flow control Ί 1 valve 8 0 to control the amount of liquid injection to the scroll compressor 10, and a solenoid valve that becomes 1 1 when the scroll compressor 10 is stopped and when power is turned off | 7 0 0 1 1 1 In the freezing device configured as above and the so-called cold The low temperature and low pressure refrigerant gas BUUt system evaporated by the circulation department in 1 1 refrigerator 2 and work cabinet 3 has been passed by era, 1 1 The paper size is applicable to the Chinese National Standard (CNS) 84 specifications (210X297 mm) -10-Economy Printed 312743 A7 B7 by the Beigong Consumer Cooperative of the Ministry of Central Standards. 5. Description of the invention (8) The accumulator 60 in the machine room 4 is compressed into a high-temperature high-pressure refrigerant gas in the scroll compressor 10. . At this time, the pulsation of the high-pressure gas discharged from the scroll compressor 10 is also reduced, and the flow sound of the refrigerant gas generated in the piping and the vibration of the piping itself can also be reduced. Then, the refrigerant gas system is condensed into a refrigerant liquid in the air-cooled condenser 20 provided outside the house, and temporarily stored in the receiver 30. Then, through the piping 3 3 of the refrigerant liquid, through the electromagnetic on-off valve 35 and the expansion valve 36, it becomes the circulation system of the refrigerator 2 and the cabinet 3 that reenters the evaporator, and cold air is generated. Hereinafter, the outline of the control operation of the suction pressure of the refrigeration cycle unit of FIG. 3 will be described according to the flowchart of FIG. When the capacity of the compressor is fixed, if the load required by the evaporator becomes larger, that is, when the temperature rises in the refrigerator 2 and the cabinet 3, the suction pressure during the operation of the compressor becomes higher. Conversely, If it becomes supercooled and the load becomes smaller, the suction pressure becomes lower. Therefore, by detecting the suction pressure and changing the number of revolutions of the compressor, it is possible to perform the operation of controlling the capacity of the cooling capacity of the refrigerator as the load changes. The operation suction pressure detected by the suction pressure sensor 9 1 is input to the controller 20 1 (step 401), where the set pressure difference (Λ s) is allowed with the preset pressure value (P sb) set in advance. The range is compared (step 403). If the value is above, that is, in the (A) band, the operating frequency is increased and the command of the operating frequency is output to the inverter 202 (step 405). However, the upper limit of this frequency is 80 Hz (steps 404, 406). In this way, the inverter 202 produces power at a frequency instructed by the controller 201, and supplies it to the scroll compressor 10 to be controlled to increase the number of revolutions. This paper scale is applicable to China National Standard (CNS) A4 specification (210X297mm) _ '-11----------- 1 ------ ir ------ (please listen first Read the precautions on the back and then fill out this page) Employee Consumer Cooperation Du Printed A7, Central Bureau of Standards, Ministry of Economic Affairs A7 _______B7 V. Invention description (9) Conversely, if the preset pressure value (Psb) is set below, that is, in ( C) With the belt, the operating frequency is reduced (step 409). However, the lower limit of this frequency is 20 Hz (step 408, 406). If the operating suction pressure is within the allowable range, that is, in the (B) band, the frequency at that time is maintained (step 406). The set pressure value (Psb) and set pressure value (APs) set here in advance are the temperature inside the store where the refrigerator 2 and the work bar 3 at that time are installed, or the outside of the room with the air-cooled condenser 2 〇 The temperature and the like are detected and automatically changed, and thus it can become a stable and efficient operation in the middle of the year when the environment changes. In the following, the control temperature of the gas discharged from the refrigeration cycle part of Fig. 2 will be explained. A refrigerator equipped with a scroll compressor 10 retains oil on the discharge side. Therefore, some degree of overheating is necessary to maintain the viscosity of the oil. If the discharge pressure is constant, only the temperature of the discharged gas may be controlled. However, the discharge pressure depends on the operating pressure. The operating frequency varies with the temperature of the outside air. Therefore, at this time, the temperature must be controlled as low as possible without overheating. Therefore, the controller 201 calculates the temperature of the discharged gas detected by the discharged gas thermistor (temperature detector) and the superheat of the refrigerant determined by the relationship between the pressure detected by the high-pressure pressure sensor 92 Degree * As such, by using the degree of superheat, the opening of the flow control valve 80 is changed, and by controlling the amount of refrigerant liquid (liquid injection amount) to the scroll compressor 10, the liquid injection amount is increased when it is overheated Without reducing the freezing capacity, it is often controlled at an appropriate temperature to reduce the temperature of the gas discharged. Therefore, it is not necessary to use specific freon as a refrigerant, and it is possible to use freon 2 2 other than specific freon. (Please read the precautions on the back before filling in this page) This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -12-31 A7 _B7_Inventive Description (10) Figure 8 is a diagram showing the position of the pores of the volute surplus surface used for injecting refrigerant liquid inside the scroll compressor 10. The pores for refrigerant liquid injection 1 4 1 a are provided in From the beginning of the fixed spiral casing 1 1 0, the winding end is within one roll (within the involute angle 2 τ) and the end plate 1 1 5 close to the outer circumference of the fixed spiral casing. In addition, the end plate at the position near the inner circumference of the spiral casing 1 1 0 at the position where the advance from the fine hole 1 4 1 a 2; r is also provided with an injection fine hole 1 4 1 b, the fine hole is made In this position, the refrigerant liquid has a space 121a, 121b that is ejected once to the discharge orifice 102 during the rotation motion of the vortex spiral 11111, thus avoiding excessive liquid compression of the refrigerant and reducing the freezing capacity . Also, by calculating the superheat of the suction gas determined by the relationship between the temperature of the suction gas detected by the suction gas thermistor 93 and the operating suction pressure, the wet compression can be prevented, or an alarm can be issued. It can be seen from the above that the superheat degree on the discharge side and the suction side can be determined by the pressure and temperature if the type of refrigerant is determined, but if the type of refrigerant is different, the temperature, pressure, and superheat are also different. Therefore, enter the physical property values of several refrigerants in the controller 2 Ο 1 first. Even if the types of the refrigerants are different, the correct superheat can be calculated, and the value can be selected by an external switch or other setter. By this, the correct superheat can be controlled even if the types of refrigerants are different. Figure 5 illustrates a method of continuing the operation even if the inverter is faulty. Inverter 2 0 2 is under normal conditions, close electromagnetic contactor 2 0 3 and electromagnetic contactor 2 0 4, the power supply is used for scroll compressor 1 〇 (please read the precautions on the back before filling in this Page) This paper standard is universal Chinese National Standard (CNS) A4 specification (210X297mm> -13-A7 B7__ printed by the Employee Consumer Cooperative of the Central Standard Falcon Bureau of the Ministry of Economic Affairs V. Invention description (11) The motor is controlled. When the temperature of the inverter 202 rises abnormally, the inverter 2 0 2 itself sends the abnormal signal to the controller 2 0 1, or the current set on the secondary side of the inverter 2 0 2 Detector 2 0 1 detection 'Even if the controller 2 0 1 outputs the operation command to the inverter 2 0 2 and the current detector 2 0 1 fails to detect, etc., it is judged as a failure and the electromagnetic contactor 2 0 is opened 3 and the electromagnetic contactor 2 0 4, turn off the electromagnetic contactor 2 0 5, and directly supply commercial power to the motor for the scroll compressor 10. As a result, at least stoppage can be avoided even if the control operation is not performed. Figure 6 It is attached to the refrigerating device 100 and represents the peripheral part of the scroll compressor 10. Device 1 0 0 is built-in inverter 2 0 2 * controller 201, 'electromagnetic contactors 203, 204, 205 and current detector 2 0 6 etc. electrical box (drive device) 2 0 0 with digital display Panel 2 0 7. Figure 7 shows the details of the digital display panel 2 0 7; as the digital display items, there are codes 2 0 8, data 2 0 9 and display item selection keys 2 1 0 »Operation selection key 2 1 0 Available data 2 0 9 Numerically display the operating status (set pressure, discharge pressure, suction pressure and other pressures, discharge gas temperature, suction gas temperature, store temperature, outdoor temperature, etc.), discharge gas refrigerant superheat, suction Superheat degrees such as gas refrigerant superheat, etc., other, operating frequency, operating current, etc.). In the abnormal state, there is an abnormal light 2 1 1, the code for the reason for stopping at this time, and the stop of the protection device operation, etc. It can be seen that there is a function of the protection device that acts to maintain the operating state at the time of abnormal stop, etc. I ----------- / ------ Subscribe ------ ^ I ( Please read the precautions on the back before filling this page) This paper size is applicable to China Home Standard (CNS) A4 specification (210X297mm) '14-A 7 ___B7___ V. Description of the invention (12) [Effects of the invention] According to the present invention, when a plurality of small refrigerated display cabinets are installed, the modification and display items in the store Even if the number of display cabinets connected and the storage temperature are greatly changed, the load can be operated according to the capacity, and the suction pressure during the operation of the refrigerator during a year often becomes constant and energy saving can be obtained. effect. In addition, it can be finely controlled to minimize the temperature fluctuation in the display cabinet, the storage temperature in the display cabinet is stable, and the freshness of the storage product can be obtained. In addition, the original scroll compressor with little torque variation can be placed in the machine room to achieve low noise and save space. In addition, for trial operation or service, correspondence and display of failures, and so on. [Brief Description of Drawings] FIG. 1 is a plan view showing the overall arrangement of an embodiment of a store freezing device of the present invention. Figure 2 is a side view showing the overall configuration of an embodiment of the present invention. Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs (please read the precautions on the back before filling out this page). Figure 3 shows a part of the present invention. A block diagram of the structure of the refrigeration cycle of the embodiment. Fig. 4 is a flowchart showing the outline of the control operation of the suction pressure of the refrigeration cycle unit according to an embodiment of the present invention. Figure 5 is a block diagram showing a method of continuing operation when an inverter fails according to an embodiment of the present invention. "The Zhang scale is applicable to the Chinese hoarder standard (CNS) A4 specification (2 丨 0X297mm) ~~ i ~ '15-312743 A7 B7 Fifth, the description of the invention (13) Figure 6 is a side view showing the peripheral equipment of the scroll compressor according to an embodiment of the present invention. Fig. 7 is a detailed front view showing a display panel according to an embodiment of the present invention. Fig. 8 is a cross-sectional view showing the relationship between the inside of the scroll compressor, the meshing state of the scroll casing, and the positions of the scroll casing and the pores used to inject the refrigerant liquid, according to an embodiment of the present invention. (Please read the precautions on the back before filling out this page) Booking! Du Printing Co., Ltd., Beigong Consumer Cooperation, Central Bureau of Standards, Ministry of Economic Affairs This paper size is applicable to the Chinese National Standard (CNS) A4 (210X297mm) -16-