200925536 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種冰箱，其具備用於打開藉由磁鐵墊圈 保持於關閉狀態之貯藏室之門的開門裝置。 【先前技術】 近年來，冰箱大型化之傾向顯著，伴隨於此，開閉冷藏 室及冷凍室等貯藏室的門亦大型化。冰箱之門，通常構造 成藉由設置於門周邊部的磁鐵墊圈之吸附力而保持於關閉 狀態。因此，門大型化後，磁鐵墊圈之總長度變長，相對 開門操作所需要之力變大。因此，為減輕開門操作所需要 之力，譬如考慮使用如電磁螺線管之電動驅動源來打開門 之電動輔助方式的開門裝置（譬如專利文獻丨），現在已實用 化0 又，雖與本發明無直接關係，但在專利文獻2中揭示一 種冰箱之自動製冰裝置，其在用於從貯水箱向製冰盒給水 之給水路上設置以螺線管為驅動源之給水閥，通常藉由將 螺線管以與給水閥之開驅動時相反極性通電，將螺線管利 用作為給水路之凍結防止用加熱器。 [專利文獻1]日本特開2〇〇ι·28〇827號公報 [專利文獻2]日本特開2006-275348號公報 【發明内容】 [發明所欲解決之問題] 可將開Η裝置配置於冰箱外之情形耗好，但根據門之 位置’有時必須配置於冰箱内。❻，若將開門裝置配置於 131646.doc 200925536 冰相内，則對於暴露於冰箱内冷氣之開門裝置，有在開門 時侵入冰箱内之外氣之濕氣等結露凍結，而不能進行開門 動作之虞。 本心明係鑒於上述情形發明而成者，其目的係提供一種 可防止開門裝置之凍結的冰箱。 [解決問題之技術手段] 本發明之冰箱之特徵在於：為防止配置於冰箱内之開門 裝置之凍結，設置有對開門裝置之電動驅動源以比開門動 作時低之電壓通電之低電壓施加機構。 [發明之效果] 由於以低電壓對電動驅動源通電，因此藉由伴隨該通電 之電動驅動源之發熱，可防止開門裝置之凍結。 【實施方式】 以下’以實施形態具體地說明本發明。 (第1實施形態） 圖1至圖5顯示本發明之第1實施形態。如圖3及圖4所 示’本實施形態之冰箱係在冰箱本體1設置有作為貯藏室 之位於上部之冷藏室2、位於下部之冷束室3、及位於該等 冷藏至2與冷；東室3之間之左右的製冰室4與小冷;東室5。再 者，在本實施形態令，蔬菜室係藉由可拉出地配置於冷藏 室2内之蔬菜盒（未圖示）而構成。 上述冰箱本體1由在鋼板製之外箱6與塑膠製之内箱7之 間填充斷熱材8而構成’内箱7内設上述各貯藏室2〜5。 且，在冰箱本體1設置有開閉各貯藏室2〜5之前面開口部之 131646.doc 200925536 門9〜12。在該等門9〜12之中，火益—^ „ 7藏至2之門9為兩邊可開 式’冷凍室3、製冰室4及小冷凌玄ς ★卩g，Λ ,。h 今來至5之門1〇〜12均為抽屜 式。 冷藏室2之兩邊可開式之門9,藉由未圖示之鉸鏈支樓為 可旋動，4凍室3、製冰室4及小冷减室5之抽展式之門 Π)〜12, ϋ由未圖示之軌道支撐為可沿前後方向移動。抽 展式之門…匕之内面固定有口字形之保持框13，於該保 持框13可裝卸地保持有收纳食品之容器14。i，該等容器 14伴隨門10〜12之拉出從貯藏室拉出。 參 冷减室3、製冰室4及小冷;東室5，由於位於相同溫度帶 而相互連通。該等冷柬室3、製冰室4及小冷;東室5之深 處’設置有前後雙重之覆蓋片15a、15b。後側之覆蓋片 15b，在與冰箱本體〗之背壁之間形成冷卻器室16 ,在該冷 卻器室丨6之内部設置有冷卻器17與冷氣循環用之風扇18。 且，風扇18旋轉時，由冷卻器17冷卻之冷氣從形成於前側 之覆蓋片15a之複數個吹出口 19供給到冷凍室3、製冰室4 及小冷凍室5，冷卻各室3〜5後之空氣，從形成於覆蓋片 15b之吸入口 20再次返回到冷卻器室16，如此地循環。 又，冷藏室2藉由其他冷卻器冷卻。 如上所述循環之空氣在藉由冷卻器17冷卻之際，該空氣 中所含有之水分變成霜附著於冷卻器1 7。由於此霜使冷卻 器17之冷卻能力下降，因此在冷卻器17之下方設置有除霜 加，..、器21以藉由該除霜加熱器21之加熱來融化霜（除 霜）。由此除霜而產生之水（除霜水）從冷卻器室16之底部之 131646.doc 200925536 排水口 22排出到外部蒸發m (未圖示）。 再者在則述各門9〜12之内側周邊部，裝配有磁鐵墊圈 構&成在各門9〜12為關閉狀態時，磁鐵替圈Μ吸附 於冰箱本體i，藉由該吸附力各門9〜12保持為關閉狀態。 該等門9〜12之中，冷藏室2之門9與冷，東室3之門1〇,由於 ' 开嫩較大’其磁鐵墊圏23之總長度亦較長，因此相對吸 _ 附力較大’開門操作需要較大的力。 因此，在冰箱本體1之外上面及冰箱内，設置有分別用 冷藏室2之門9、冷来室3之門1〇給予打開助力之開門 裝置24。該等開門裝置24，由於僅安裝位置不同，均為同 一之構成，因此以下對與本發明直接關係之冷凍室3之門 10之開門裝置24進行說明。 :，冷陳室3、製冰室4及小冷;東室5，由於位於同一溫 度帶’因此相互連通。自，在冰箱本體k前面開口部， 設置有分割冷;東室3與製冰室4、小冷滚室5之間的前橫框 發又置有为割製冰室4與小冷凍室5之間的前豎框 25b因此，刖橫框25a之後方成為無助於食品收納的空 間，在此空間之左右方向中央部，配設有設置為架跨於前 橫框25a與前覆蓋片15a之間的安裝構件26。且在此寬度 窄且前後長之安裝構件26之下部安裝有前述開門裝置Μ。 因此，開門裝置24成為利用此無用空間配設而成之形熊。 如圖1所示，開門裝置24,以固定於安裝構件26之圓筒 狀線圈27與設置為可於此線訪内移動之可動鐵心28構成 之螺線管29作為電動驅動源。可動鐵心28藉由廢縮彈菁 131646.doc 200925536 向後方賦能，通常位於從線圈27内向後方突出之後退位 置。在此可動鐵心28之前端部，連結有偏心於下方之推出 桿31，此推出桿31通過前橫框25a之下方而接近於冷凍室^ 之門10之内面上部。 且，線圈27通電後，藉由線圏27之磁吸引力，可動鐵心 28向前方移動，藉由推出桿31將冷凍室3之門ι〇向前方 推。藉此，門10抵抗磁鐵墊圈23之吸附力向打開方向之前 方推出。 另一方面，在門10上安裝有可動把手1〇a。又門⑺上 設置有在拉可動把手10a時為接通之譬如由常閉型微型開 關構成之開門開關32(參照圖5)。又，在冰箱本體㈠則，設 置有用於檢測門10之開閉狀態之門開關33(參照圖5)。此門 開關33，譬如由在門1〇位於關閉位置時輸出斷開信號，在 其以外之時輸出接通信號之常開型微型開關構成。 圖5係顯示關聯於開門裝置2 4之控制的電性構成之方塊 圖。在此圖5中，控制裝置34係譬如以微電腦為主體，在 此控制裝置34上連接有冷凍循環之壓縮機35、驅動冷氣循 環用之前述風扇18之風扇馬達36、前述除霜加熱器21、檢 測冷部器17之溫度的冷卻器用溫度感測器37、前述開門開 關32、前述門開關33、pWM形成電路“、計時電路39。 上述PWM形成電路38，主要經由由開關元件構成之驅動 電路40來控制開門裝置24之線圈27之通斷電。KpwM形成 電路38，在從控制裝置34接收工作（duty)信號後，以對應 該工作信號之執行工作來控制通斷電線圈27。在本實施例 131646.doc -10· 200925536 中’控制裝置34對於PWM形成電路3 8輸出0.5、1之任一工 作信號。 且’ PWM形成電路38在為1之工作信號之情形，向線圈 27施加通常之驅動電壓，藉此可動鐵心28藉由線圈27之磁 性吸引力向前方移動。工作信號為〇 5之情形，pWM形成 - 電路38向線圈27施加通常驅動電壓之一半電壓。此時，線 圈27之磁性吸引力較弱，可動鐵心28未向前方移動，但線 圈27產生焦耳熱，加溫開門裝置24。因此，形成電路 ® 38，作為向電動驅動源之螺線管29之線圈27低電壓通電之 低電壓施加機構而起作用。 前述計時電路39具有複數個計時部與加算計時部。其 中，加算計時部加算基於控制裝置34之壓縮機35的運轉時 間。又，各計時部構成為藉由來自控制裝置34之計數開始 指令開始計時計數。 其次，說明上述構成之作用。首先，壓縮機35之運轉係 〇 基於冷凍室3之溫度而進行。即，若冷凍室3内成特定之接 通溫度以上，則未圖示之冷;東室用溫度感測器將其檢測 出。然後，控制裝置34使屋縮機35啟動，且啟動風扇馬達 % ^藉此，由冷卻器17冷卻之冷氣供給到冷凍室3、製冰 室4、小冷凍室5。藉由此冷氣供給，冷凍室3成為特定之 斷開，皿度以下後，由於未圖示之冷珠室用溫度感測器將其 檢測出’因此控制裝置34停止壓縮機35及風扇馬達％。 且，基於計時電路39之壓縮機35之運轉加算時間達到特 定時間時，控制裝置34對除霜加熱器21通電’進行使附著 131646.doc 200925536 於冷卻器17之霜溶解之除霜運轉。在藉由此除霜運轉除去 附著於冷卻器17之霜後，冷卻器17之溫度成特定之正溫度 以上β在冷卻器用溫度感測器37檢測出特定之正溫度以上 時，控制裝置34斷電除霜加熱器21，結束除霜運轉。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator provided with a door opening device for opening a door of a storage compartment held in a closed state by a magnet gasket. [Prior Art] In recent years, the tendency of the refrigerator to increase in size has become remarkable, and as a result, the doors of the storage compartments such as the refrigerator compartment and the freezer compartment have been enlarged. The door of the refrigerator is usually constructed to be kept closed by the suction force of the magnet gasket provided at the periphery of the door. Therefore, after the door is enlarged, the total length of the magnet washer becomes long, and the force required for the door opening operation becomes large. Therefore, in order to reduce the force required for the door opening operation, for example, a door opening device (such as a patent document) that uses an electric driving source such as an electromagnetic solenoid to open the door, has been put into practical use, and The invention has no direct relationship, but in Patent Document 2, an automatic ice making device for a refrigerator is provided, which is provided with a water supply valve using a solenoid as a driving source on a water supply path for supplying water from the water storage tank to the ice making box, usually by The solenoid is energized in the opposite polarity to that of the water supply valve, and the solenoid is used as a freezing prevention heater for the water supply passage. [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei. No. 2006-275348 [Patent Document 2] [Problems to be Solved by the Invention] The opening device can be disposed in The situation outside the refrigerator is good, but depending on the position of the door, it must be placed in the refrigerator. ❻If the door opening device is placed in the ice-phase of 131646.doc 200925536, the door opening device exposed to the cold air in the refrigerator may have condensation and freezing such as moisture that invades the outside of the refrigerator when the door is opened, and cannot open the door. Hey. The present invention has been made in view of the above circumstances, and an object thereof is to provide a refrigerator which can prevent freezing of a door opening device. [Technical means for solving the problem] The refrigerator of the present invention is characterized in that, in order to prevent freezing of the door opening device disposed in the refrigerator, a low voltage applying mechanism in which an electric driving source for the door opening device is energized at a lower voltage than when the door opening operation is performed is provided. . [Effects of the Invention] Since the electric drive source is energized at a low voltage, the door opening device can be prevented from freezing by the heat generated by the energized electric drive source. [Embodiment] Hereinafter, the present invention will be specifically described by way of embodiments. (First Embodiment) Figs. 1 to 5 show a first embodiment of the present invention. As shown in FIG. 3 and FIG. 4, the refrigerator according to the present embodiment is provided with a refrigerator compartment 2 located at the upper portion as a storage compartment, a cold bundle chamber 3 located at the lower portion, and the refrigerators 2 and cold. The ice making room 4 between the east room 3 and the small cold room; the east room 5. Further, in the present embodiment, the vegetable compartment is constituted by a vegetable box (not shown) which is disposed in the refrigerator compartment 2 so as to be retractable. The refrigerator main body 1 is formed by filling the heat insulating material 8 between the outer casing 6 made of steel and the inner casing 7 made of plastic. The inner casings 7 are provided with the respective storage chambers 2 to 5. Further, the refrigerator main body 1 is provided with 131646.doc 200925536 doors 9 to 12 which open and close the front opening portions of the respective storage compartments 2 to 5. Among the doors 9 to 12, the fire-^ „ 7 hidden to 2 door 9 is open on both sides of the 'freezer compartment 3, the ice making room 4 and the small cold Ling Xuanzhen ★ 卩g, Λ, .h From now on, the doors of 1 to 12 are all drawer type. The open door 9 on both sides of the refrigerating compartment 2 is rotatable by a hinged branch (not shown), 4 freezing compartments 3, and ice making compartment 4 And the threshold of the small cold-reduction room 5)~12, 支撑 is supported by the rails not shown to be movable in the front-rear direction. The sliding door is fixed to the inside of the frame with a mouth-shaped retaining frame 13, The container 14 is detachably held in the holding frame 13. The containers 14 are pulled out from the storage chamber along with the pulling out of the doors 10 to 12. The cooling chamber 3, the ice making chamber 4, and the small cold; The east chambers 5 are connected to each other because they are located at the same temperature zone. The cold chambers 3, the ice making chambers 4 and the small colds; the depths of the east chambers 5 are provided with front and rear double cover sheets 15a, 15b. The sheet 15b forms a cooler chamber 16 between the back wall of the refrigerator body, and a cooler 17 and a fan 18 for cooling air circulation are disposed inside the cooler chamber 6. Further, when the fan 18 rotates, it is cooled. 17 cooling The cold air is supplied from the plurality of air outlets 19 formed on the front side cover sheet 15a to the freezing compartment 3, the ice making compartment 4, and the small freezer compartment 5, and the air after cooling each of the chambers 3 to 5 is formed from the suction port formed in the cover sheet 15b. 20 returns to the cooler chamber 16 again, and circulates in this way. Further, the refrigerating chamber 2 is cooled by another cooler. When the air circulated as described above is cooled by the cooler 17, the moisture contained in the air becomes frost Attached to the cooler 17. Since the frost reduces the cooling capacity of the cooler 17, a defrosting addition is provided below the cooler 17, and the device 21 is melted by heating by the defrosting heater 21. Frost (defrost). The water (defrost water) generated by the defrosting is discharged from the bottom of the cooler chamber 16 at 131646.doc 200925536, the drain 22 to the external evaporation m (not shown). The inner peripheral portion of each of the doors 9 to 12 is equipped with a magnet washer structure. When the doors 9 to 12 are closed, the magnet is attached to the refrigerator body i by the suction force, and the doors 9 to 12 are held by the suction force. In the closed state. Among the doors 9 to 12, the door 9 of the refrigerating compartment 2 is cold, The door of the chamber 3 is 1 〇. Since the total length of the magnet cymbal 23 is also longer, the relative suction _ has a larger force. The door opening operation requires a larger force. Therefore, in the refrigerator body 1 In the outer upper surface and the refrigerator, a door opening device 24 for opening the opening is provided by the door 9 of the refrigerating chamber 2 and the door 1 of the refrigerating chamber 3, respectively. The door opening devices 24 are identical in configuration because they are only installed at different positions. Therefore, the door opening device 24 of the door 10 of the freezing compartment 3 directly related to the present invention will be described below. :, the cold chamber 3, the ice making chamber 4, and the small cold; the east chamber 5, because they are located at the same temperature zone, thus mutual Connected. Since the front opening portion of the refrigerator body k is provided with split cooling; the front horizontal frame between the east chamber 3 and the ice making chamber 4 and the small cold rolling chamber 5 is provided with a cutting ice chamber 4 and a small freezing chamber 5 Therefore, the front stile 25b is a space which does not contribute to the food storage, and the center portion of the space in the left-right direction is disposed so as to span the front horizontal frame 25a and the front cover 15a. The mounting member 26 is between. Further, the above-described door opening device 安装 is attached to the lower portion of the mounting member 26 having a narrow width and a front-rear length. Therefore, the door opening device 24 becomes a bear shaped by the useless space. As shown in Fig. 1, the door opening device 24 serves as an electric drive source by a cylindrical coil 27 fixed to the mounting member 26 and a solenoid 29 formed as a movable iron core 28 movable in the line. The movable iron core 28 is energized rearward by the scraping elastic glaze 131646.doc 200925536, and is usually located rearward from the inside of the coil 27. At the front end of the movable iron core 28, an ejecting lever 31 which is eccentric to the lower side is connected, and the ejecting lever 31 is brought close to the inner upper surface of the door 10 of the freezing compartment by the lower side of the front lateral frame 25a. When the coil 27 is energized, the movable iron core 28 moves forward by the magnetic attraction force of the coil 27, and the door of the freezing compartment 3 is pushed forward by the push-out lever 31. Thereby, the door 10 is pushed out against the suction force of the magnet washer 23 in the opening direction. On the other hand, a movable handle 1A is attached to the door 10. The door (7) is provided with a door opener switch 32 (see Fig. 5) which is closed when the movable handle 10a is pulled, such as a normally closed type miniature switch. Further, in the refrigerator main body (1), a door switch 33 (see Fig. 5) for detecting the opening and closing state of the door 10 is provided. The door switch 33 is constituted, for example, by a normally open type micro switch that outputs an OFF signal when the door 1 is in the closed position and an ON signal when it is outside. Fig. 5 is a block diagram showing the electrical configuration associated with the control of the door opening device 24. In FIG. 5, the control device 34 is mainly composed of a microcomputer, and a compressor 35 for refrigerating cycle, a fan motor 36 for driving the fan 18 for cooling air circulation, and the aforementioned defrosting heater 21 are connected to the control device 34. The cooler temperature sensor 37 for detecting the temperature of the cold packer 17, the above-described door open switch 32, the above-described door switch 33, and the pWM forming circuit ", the timer circuit 39. The PWM forming circuit 38 is mainly driven by a switching element. The circuit 40 controls the on and off of the coil 27 of the door opening device 24. The KpwM forming circuit 38 controls the on/off electric coil 27 in response to the execution of the operation signal after receiving the duty signal from the control device 34. In the embodiment 131646.doc -10·200925536, the 'control device 34 outputs any one of 0.5, 1 for the PWM forming circuit 38. And the PWM forming circuit 38 applies the coil 27 to the operating signal of 1. The driving voltage is normally driven, whereby the movable core 28 is moved forward by the magnetic attraction force of the coil 27. When the operation signal is 〇5, the pWM is formed - the circuit 38 applies a normal drive to the coil 27. At one time, the magnetic attraction force of the coil 27 is weak, and the movable iron core 28 does not move forward, but the coil 27 generates Joule heat and warms the door opening device 24. Therefore, the circuit® 38 is formed as an electric drive source. The coil 27 of the solenoid 29 functions as a low voltage applying means for energizing the low voltage. The timing circuit 39 has a plurality of timing units and an addition timing unit. The addition timing unit adds the operation of the compressor 35 based on the control unit 34. Further, each of the timer units is configured to start counting by the counting start command from the control device 34. Next, the operation of the above configuration will be described. First, the operating system of the compressor 35 is performed based on the temperature of the freezing compartment 3. If the inside of the freezer compartment 3 is at a specific on-temperature or higher, it is not shown in the cold; the east chamber is detected by a temperature sensor. Then, the control device 34 activates the contractor 35 and starts the fan motor%. Thereby, the cold air cooled by the cooler 17 is supplied to the freezing compartment 3, the ice making compartment 4, and the small freezing compartment 5. By the supply of the cold air, the freezing compartment 3 becomes a specific disconnection, and the degree is After that, the cold bead chamber (not shown) detects it with a temperature sensor. Therefore, the control device 34 stops the compressor 35 and the fan motor %. Moreover, the operation addition time of the compressor 35 based on the timer circuit 39 reaches a specific time. At the time of the time, the control device 34 energizes the defrosting heater 21 to perform a defrosting operation for dissolving the frost applied to the cooler 17 by the attachment 131646.doc 200925536. After the frost attached to the cooler 17 is removed by the defrosting operation, When the temperature of the cooler 17 is equal to or higher than the specific positive temperature β, when the cooler temperature sensor 37 detects a specific positive temperature or higher, the control device 34 turns off the defrosting heater 21 and ends the defrosting operation.
另一方面，為打開冷凍室3之門1〇而手握把手1〇a拉開 時，把手10a使開門開關32接通。然後，由於控制裝置34 向PWM形成電路38輸出執行工作為丨之工作信號，因此開 門裝置24之線圈27以通常之驅動電壓通電。此時，控制裝 置34構造成使計時電路39之計時部動作、僅在特定時間譬 如計數1〜2秒間通電於線圈27。 然後’藉由此線圈27之通電’可動鐵心28被線圈27吸引 向前方移動，經由推出桿31將門1〇推到前方。藉此，門1〇 抵抗磁鐵㈣23之磁性吸引力向前方㈣，將磁鐵塾圈^ 從冰箱本體1拉離。因此’其後僅輕拉把手即可將門⑺ 拉出至全開位置。&門10之打開，藉由門開關33檢測出。 接著’在藉由門開關33檢測出門1〇之打開時，控制裝置％ 斷電冷氣循環用之風扇馬達36，以使冷氣不從打開前面逃 出。 又’開門裝置24之線圈27 ’在打開門叫以外之情形， 以圖2之流程圖所示之時點低電壓通電。藉由此低電壓通 電，線圈27產生焦耳埶加溫p …/皿開門裝置24，使該開門裝置24 不由於冷束室3内之冷翁而、去沾 7虱而凍結。以下，稱低電壓通電此 線圈27之運轉為来結防止運轉。 進入圖2之凍結防止運韓法 %得之"丨L程圖之執行時，首先，控 13I646.doc 200925536 制裝置34判斷從前次之束結防止運轉結束是否已經過特定 時間以上（步驟si)。設置有開門裝置24之冷凍室3内，由 於為負溫度，因此當前次之凌結防止運轉結束後經過特定 時間以上，開門裝置24亦成低溫度，成易結霜之狀態。因 此，從前次凍結防止運轉經過特定時間以上時（步驟“中 - 4「YES」）’控制裝置34以低電壓通電開門裝置24之線圈 - 27，開始凍結防止運轉（步驟S6)。 即使在前次凍結防止運轉結束後未經過特定時間以上之 © 情形（在步驟81中為「NO」），冷卻運轉開始狀態、即壓縮 機35之通電時或從對於壓縮機35之通電開始經過特定時間 月'J之時，控制裝置34開始凍結防止運轉（步驟S2中為 「YES」、步驟S6)。在冷卻運轉開始狀態中，冷卻器丨7尚 未那般冷卻，處於霜難以附著之狀態。此時，藉由冷凍室 3内之冷氣冷卻之開門裝置24容易產生結霜。因此，在處 於冷卻運轉開始狀態時開始凍結防止運轉，具有防止開門 裝置24束結之效果。 0 即使不在冷卻開始狀態而在除霜中之情形’在除霜開始 後經過特定時間以上之情形，控制裝置34開始凍結防止運 轉（步驟S2中為「NO」、步驟S3中為rYES」、步驟S4中為 「YES」、步驟S6)。除霜開始後經過特定時間以上，則由 於附著於冷卻器17之霜融化，成為濕度高之狀態，因此霜 容易附著於開門裝置24。因此，在除霜開始後經過特定時 間以上之時點開始凍結防止運轉，防止開門裝置Μ之結 霜。 、。 131646.doc 13 200925536 在除霜中，即使在除霜開始後經過特定時間之前（步驟 中為YES」、步驟S4中為「NO」），在冷卻器用溫度感 測1137檢_"溫度以±之情形’控制裝置爛始床結 防止運轉（步驟S5中為「YES」、步驟S6)。在冷卻器17之結 霜量少之情形，即使在除霜開始後經過特定時間之前，有 時亦有霜溶解、藉由該除霜水之蒸發使冷减室3内之濕度 變高。霜之溶解由冷卻器用溫度感測器37之溫度上升而可 因此在冷卻器用/JEL度感測器3 7檢測出特定溫度以上之 情形，開始凍結防止運轉。 如上所述開始凍結防止運轉，在該凍結防止運轉進行特 定時間之後，控制裝置34停止凍結防止運轉（步驟S7中為 「YES」、步驟S8)。凍結防止運轉持續特定時間後，開門 裝置24藉由線圈27之發熱而變暖。因此，由於進一步對線 圈27繼續通電則反而成為無用之通電，因此在凍結防止運 轉持續特定時間後，斷電線圈27。 如此根據本實施形態，由於在特定時點以低電壓通電開 門裝置24使之發熱，藉此加溫開門裝置24使其不凍結，因 此可有效防止開門裝置24因凍結而產生動作不良之問題。 (第2實施形態） 圖6顯示本發明之第2實施形態。此第2實施形態係決定 除霜後之/東結防止運轉之開始時點。即，在前次:東结防止 運轉之停止後經過特定時間以上之情形（步驟A1中為 「YES」）、處於冷卻運轉開始狀態之情形（步驟A2中為 「YES」），與前述第1實施形態同樣地開始凍結防止運 131646.doc 14 200925536 轉。 再者’在本實施形態中’即使在從前次之;東結防止運轉 之停止後未滿特定時間(步驟Α1中為「ΝΟ」）、未處於冷 :運轉開始狀態之情形(步驟Α2中為「恥」），在除霜後 冷氣循環用之風扇18旋轉之情形，控制裝置34開始來結防 止運轉（步驟A3中為「YES」、步驟Α4中為「咖」、步驟 A6)。除霜結束時’冷卻器室16内之濕度由於除霜水基發 Ο ❹ 而變高。然後，藉由冷卻運轉之開始等，在風心旋轉 後，冷卻器室16内之包含濕氣之空氣被送到冷束室3内， 開門裝置24變得容易結霜。 因此’除霜結束後開始;東結防止運轉，對於防止開門裝 置24之;東結有效，特別在如本實施形態—樣藉由風扇a之 旋轉來開始;東結防止運轉之情形，由於實際僅在向冷珠室 3内吹送含有濕氣之空氣時對線圈27通電，因此在實際產 生開門裝置2·結之虞時開始珠結防止運轉，不進行浪 之通電。 (第3實施形態） 圖7顯示本發明之第3實施形態。此第3實施形態與前述 第1實施形態不同之處在於，對應門1〇之打開而開始束結 防止運轉。即，在本實施形態中，控制裝置“在門開關33 檢測出門1〇之開閉時’每次打開使未圖示之開門計數器 (開門次數計數機構）累加i計數。又，控制裝置㈣成為， 藉由計時電路39計數（開門時間計數機構）藉由門開關训 開門10之時間’同時加算記憶該打開時間（開門時間加算 131646.doc 200925536 機構）。 二如圖7所示，打開門1〇、帛門計數器之計數數達到 士人數以上時’控制裝置34開始束結防止運轉（步驟On the other hand, when the door 1〇a of the freezing compartment 3 is opened and the handle 1〇a is pulled open, the handle 10a turns on the door opener switch 32. Then, since the control means 34 outputs an operation signal for performing the operation to the PWM forming circuit 38, the coil 27 of the opening means 24 is energized at the normal driving voltage. At this time, the control unit 34 is configured to operate the timer unit of the timer circuit 39 and energize the coil 27 only for a predetermined time, for example, 1 to 2 seconds. Then, by the energization of the coil 27, the movable iron core 28 is attracted by the coil 27 to move forward, and the door 1 is pushed forward by the push-out lever 31. Thereby, the door 1 抵抗 resists the magnetic attraction force of the magnet (4) 23 toward the front (4), and pulls the magnet ring 2 away from the refrigerator body 1. Therefore, the door (7) can be pulled out to the fully open position by simply pulling the handle. The opening of the & door 10 is detected by the door switch 33. Then, when the opening of the door 1 is detected by the door switch 33, the control unit % turns off the fan motor 36 for cooling the air circulation so that the cold air does not escape from the front of the opening. Further, the coil 27' of the door opening device 24 is energized at a low voltage as indicated by the flow chart of Fig. 2, except when the door is opened. By this low voltage power supply, the coil 27 generates a Joule 埶 warming p ... / dish opening device 24, so that the door opening device 24 does not freeze due to the cold in the cold beam chamber 3. Hereinafter, the operation of the coil 27 by the low voltage energization is referred to as the junction prevention operation. When entering the execution of the freeze prevention method of Figure 2, the control unit 13 first controls the device 1334 to determine whether the end of the previous bundle has prevented the operation from being over a certain period of time (step si ). In the freezer compartment 3 in which the door opening device 24 is provided, since the temperature is negative, the door opening device 24 is also in a low temperature state after a predetermined time or more has elapsed since the end of the current anti-blocking operation. Therefore, when the previous freeze prevention operation has elapsed for a certain period of time or longer (step "4 - "YES"), the control device 34 energizes the coil - 27 of the door opening device 24 at a low voltage to start the freeze prevention operation (step S6). Even if it has not elapsed for a certain period of time or more after the completion of the previous freeze prevention operation ("NO" in step 81), the cooling operation start state, that is, when the compressor 35 is energized or from the energization to the compressor 35, At the time of the specific time month 'J, the control device 34 starts the freeze prevention operation ("YES" in step S2, step S6). In the cooling operation start state, the cooler 丨7 has not cooled as much as it is, and the frost is hard to adhere. At this time, frosting is easily generated by the door opening device 24 which is cooled by the cold air in the freezing compartment 3. Therefore, the freeze prevention operation is started when the cooling operation is started, and the effect of preventing the door opening device 24 from being bundled is obtained. When the defrosting is not in the cooling start state, the control device 34 starts the freeze prevention operation ("NO" in step S2, rYES in step S3", step In S4, it is "YES" and step S6). When a certain period of time or more has elapsed after the start of the defrosting, the frost adhered to the cooler 17 melts and the humidity is high, so that the frost easily adheres to the door opening device 24. Therefore, the freezing prevention operation is started at a certain time or more after a lapse of the defrosting, and the frosting of the door opening device is prevented. ,. 131646.doc 13 200925536 In the defrosting, even before the lapse of a certain time after the start of the defrosting (YES in the step), "NO" in the step S4), the temperature sensing 1137 in the cooler is detected as _" In the case of the control device, the start of the bed is prevented from occurring ("YES" in step S5, step S6). In the case where the frost amount of the cooler 17 is small, even before a certain time elapses after the start of the defrosting, the frost is sometimes dissolved, and the humidity in the cooling chamber 3 is increased by the evaporation of the defrosting water. The temperature of the cooler is increased by the temperature of the cooler temperature sensor 37. Therefore, when the cooler/JEL sensor 37 detects a specific temperature or higher, the freeze prevention operation is started. When the freeze prevention operation is started as described above, the control device 34 stops the freeze prevention operation after the freezing prevention operation has elapsed for a predetermined period of time (YES in step S7, step S8). After the freeze prevention operation continues for a certain period of time, the door opening device 24 is warmed by the heat generated by the coil 27. Therefore, since the coil 27 is further energized, it becomes uselessly energized. Therefore, after the freezing prevention operation continues for a certain period of time, the coil 27 is turned off. According to the present embodiment, since the door opening device 24 is heated at a low voltage at a specific time to heat the door opening device 24, the door opening device 24 is not frozen. Therefore, it is possible to effectively prevent the door opening device 24 from malfunctioning due to freezing. (Second Embodiment) Fig. 6 shows a second embodiment of the present invention. In the second embodiment, the point at which the defrosting/east knot prevention operation starts is determined. In other words, in the case where the previous time: the east node prevents the operation from being stopped for a certain period of time or more ("YES" in step A1) and the cooling operation start state ("YES" in step A2), the first The implementation form similarly begins to freeze the anti-shipping 131646.doc 14 200925536. Further, in the present embodiment, the case where the operation is started after the stop of the operation of the east node is not completed for a certain period of time ("ΝΟ" in step Α1), and is not in the cold: operation start state (in step Α2) "Shame") When the fan 18 for cooling air circulation is rotated after the defrosting, the control device 34 starts the knot prevention operation ("YES" in the step A3, "coffee" in the step Α4, and step A6). At the end of the defrosting, the humidity in the cooler chamber 16 becomes higher due to the defrosting water base 发 。. Then, by the start of the cooling operation or the like, after the core is rotated, the moisture-containing air in the cooler chamber 16 is sent to the cold-beam chamber 3, and the door opening device 24 is easily frosted. Therefore, the start of the defrosting is completed; the east knot prevents the operation, and the door opening device 24 is prevented; the east knot is effective, especially in the present embodiment, as shown by the rotation of the fan a; the east knot prevents the operation, due to the actual situation Since the coil 27 is energized only when the air containing moisture is blown into the cold bead chamber 3, the beading prevention operation is started when the door opening device 2 and the junction are actually generated, and the energization of the waves is not performed. (Third Embodiment) Fig. 7 shows a third embodiment of the present invention. The third embodiment differs from the above-described first embodiment in that the opening prevention operation is started in response to the opening of the door 1〇. In other words, in the present embodiment, the control device "when the door switch 33 detects the opening and closing of the door 1" is opened every time, and the door opening counter (the number of times of opening the door counting means) (not shown) is counted up by i. Further, the control device (4) becomes The time is counted by the timer circuit 39 (the door opening time counting mechanism) is controlled by the door switch to open the door 10' while simultaneously counting the opening time (the opening time is added to the 131646.doc 200925536 mechanism). 2. As shown in Fig. 7, the door is opened. When the number of counts of the trick counter reaches the number of people or more, the control device 34 starts the bundle to prevent the operation (step
中為「YES」、步驟B4中為「YES ^」步驟B7)。即，打開 門則每次外面空氣侵入到冷來室3内。由於外面空氣 含有漏乳’因此該濕氣接觸開門裝置24後結露結冰或成霜Medium is "YES", and step B4 is "YES ^" step B7). That is, when the door is opened, the outside air intrudes into the cold room 3 each time. Since the outside air contains leaking milk, the moisture contacts the door opening device 24 and is dew condensation or frosting.
附著m開門次數❹】特定:欠數以上日㈣始柬結防 止運轉，可有效防止開門裝置24之凍結。 又，即使門10之打開次數未達到特定次數，但門1〇處於 打開狀態之總時間(門打開加算時間)達到特定時間以上， 則控制裝置34開始凍結防止運轉（步驟B4中為「N〇」、步 驟B5中為「YES」、步驟B7)。 再者，即使門打開加算時間未達到特定次數，但門1〇處 於打開狀態之連續打開時間達到特定時間以上之情形，控 制裝置34開始凍結防止運轉（步驟B5中為「N〇」、步驟B6 中為「YES」、步驟B7)。 如此’門1 0之總打開時間達到特定時間以上、或即使門 1 0僅打開一次但處於打開狀態之時間達到特定時間以上 時’由於開門裝置24易珠結，因此在如此之時點進入凍結 防止運轉，可有效防止其凍結。 (第4實施形態） 圖8顯示本發明之第4實施形態。此實施形態與前述第1 實施形態不同之處在於，設置有檢測開門裝置24之溫度的 開門裝置用溫度感測器與檢測冷凍室3或冷卻器室〗6内之 16 131646.doc 200925536 /愚度的濕度感測器’藉由該等開門裝置用溫度感測器之檢 測溫度、濕度感測器之檢測濕度來決定凍結防止運轉之結 束時點。 即’在束結防止運轉開始後，在經過特定時間以上之時 點結束凍結防止運轉（步驟C7中為「YES」、步驟C11)，但 即使在經過特定時間之前’在開門裝置用溫度感測器之檢 測溫度為特定溫度以上之情形，由於沒有開門裝置24凍結 之虞’因此控制裝置34結束凍結防止運轉（步驟C7中為 NO」、步驟C8中為「yES」、步驟匸⑴。 又’即使開門裝置用溫度感測器之檢測溫度未達特定溫 度’且濕度感㈣器之檢測濕度未達特冑滿度之情形，由於 冷凍至3内之濕氣少，沒有開門裝置24凍結之虞，因此控 制裝置34結束凍結防止運轉（步驟C8中為「N〇」、步驟c9 中為「YES」、步驟ci 1)。 再者，在開門開關32檢測出門10之把手10a之拉操作之 ❹ 月形由於開門裝置24之線圈27以通常之驅動電壓通電、 發熱，因此在此時，結束凍結防止運轉（步驟c9中為 「N〇」、步驟C10中為「yes」、C11)。 '(第5實施形態） 圖9顯示本發明之第5實施形態。本實施形態與前述第1 實施形態之不同處在於，控制裝置34連接有作為可改寫之 記憶機構之可電性刪除EEpR〇M 41。此EEpR〇M Ο記憶 有，右以第1實施形態而言，則為步驟S1之特定時間、步 驟^之特定時間、步驟S5之特定時間、步驟37之特定時 131646.doc 200925536 間，若以第2實施形態而言， 貝J為步驟A5之特定溫度、步 驟A7之特定溫度，若以第3眘 笫3實施形態而言，則為步驟B2 以壓縮機35之運轉開始後特定時 竹疋呀間以内為冷部開始狀能之 情形的特定日㈣、步驟B4之特定次數、步細之特:時 間、步驟B6之特定時間，若以第4實施形態而言，則為步 ㈣之特U度、步驟C9之特^度等數值，該等⑽ 數值可變更。藉此，藉由對應情況而變更上述數值，可無 過與不及地進行凍結防止運轉。The number of times the door is attached is ❹] specific: the number of owed days (four) starts to prevent the opening of the door opening device 24, and can effectively prevent the freezing of the door opening device 24. Further, even if the number of times the door 10 is opened does not reach a certain number of times, the total time (door opening addition time) when the door 1 is in the open state reaches a certain time or longer, the control device 34 starts the freeze prevention operation ("N〇 in step B4". In step B5, it is "YES" and step B7). Further, even if the door opening addition time does not reach the specific number of times, the continuous opening time of the door 1 〇 in the open state reaches a certain time or longer, and the control device 34 starts the freeze prevention operation ("N〇" in step B5, step B6) Medium is "YES", step B7). Thus, when the total opening time of the door 10 reaches a certain time or longer, or even if the door 10 is opened only once but the time when the open state reaches a certain time or longer, 'because the door opening device 24 is easy to beaded, the freezing prevention is prevented at such a point. Operation can effectively prevent it from freezing. (Fourth embodiment) Fig. 8 shows a fourth embodiment of the present invention. This embodiment differs from the above-described first embodiment in that a temperature sensor for detecting a door opening device 24 and a temperature detecting device for detecting the temperature of the door opening device 24 and a refrigerator chamber 3 or a cooler chamber are provided. The degree of humidity sensor 'determines the end of the freeze prevention operation by the temperature sensing sensor and the humidity detected by the humidity sensor of the door opening device. In other words, after the start of the bundle prevention operation, the freeze prevention operation is completed when the predetermined time or longer elapses (YES in step C7, step C11), but the temperature sensor for the door opening device is used even before the specific time has elapsed. When the detected temperature is equal to or higher than the specific temperature, the control device 34 ends the freeze prevention operation (NO in step C7), "yES" in step C8, and step 匸(1). If the temperature detected by the temperature sensor of the door opening device does not reach the specific temperature' and the humidity of the humidity sensor (4) is not at the fullness of the fullness, since there is little moisture in the freezing to 3, there is no freezing of the door opening device 24, Therefore, the control device 34 ends the freeze prevention operation ("N" in step C8, "YES" in step c9, and step ci 1). Further, the door opening switch 32 detects the pulling operation of the handle 10a of the door 10. Since the coil 27 of the door opening device 24 is energized and generates heat at the normal driving voltage, the freeze prevention operation is terminated at this time ("N〇" in the step c9, "yes", C in the step C10). 11). (Fifth Embodiment) Fig. 9 shows a fifth embodiment of the present invention. The difference between the present embodiment and the first embodiment is that the control device 34 is connected to the operability of the rewritable memory mechanism. The EEpR〇M 41 is deleted. The EEpR〇M Ο is stored, and in the first embodiment, the specific time of the step S1, the specific time of the step ^, the specific time of the step S5, and the specific time of the step 37 are 131646. Doc 200925536, in the second embodiment, the bay J is the specific temperature of the step A5 and the specific temperature of the step A7, and in the third embodiment, the step B2 is operated by the compressor 35. The specific day (4), the specific number of steps B4, and the specific time of the step B4, the time and the specific time of the step B6, in the case of the fourth embodiment, Then, the numerical value of the special U degree of the step (4) and the special degree of the step C9 can be changed, and the numerical value can be changed by changing the numerical value by the corresponding situation, and the freezing prevention operation can be performed without any delay.
❹ (其他實施形態） 本發明不P艮定於上述且圖面所示之實施㈣，可進行如 下之擴張或變更。 進行凍結防止運轉之開門裝置24，不限定於設置在冷凍 室3内，對於配設於有凍結之虞之冰箱内部分之開門裝 置’亦可適用本發明之來結防止運轉。 作為向開門裝置24施加低電壓之機構，不限於基於pWM 方式者。亦可為藉由變壓器降壓商用交流電源後施加給線 圈27之構成。又’亦可為藉由相位控制將商用交流電源變 成低電壓後施加於線圈27之構成。 作為開門裝置24之電動驅動源，不限於螺線管29。譬如 亦可為使用馬達作為電動驅動源、譬如藉由齒條與小齒輪 將其旋轉轉換成直線運動而打開門1 0之構成。此情形之凍 結防止運轉’藉由向馬達之線圈施加低電壓進行。 【圖式簡單說明】 圖1係顯示本發明之第丨實施形態之開門裝置周邊部分之 131646.doc -18- 200925536 縱戴面側視圖。 制内容的 圖2係顯示關於開門裝置之凍結防止運轉之控 流程圖。 圖3係破斷一部分而顯示之冰箱之側面圖。 圖4係冰箱之正面囷。 圖5係顯示電性構成之方塊圖。 圖6係顯示本發明之第2實施形態之圖2相當圖。 圖7係顯示本發明之第3實施形態之圖2相當圖。 ® 圖8係顯示本發明之第4實施形態之圖2相當圖。 圖9係顯示本發明之第5實施形態之圖5相當圖。 【主要元件符號說明】 3 5 9 10 冰箱本體 冷凍室（貯藏室） 小冷凍室 門 門 可動把手 容器 覆蓋片 覆蓋片 10a 14 15a 15b 17 冷卻器 18 風扇 19 吹出口 21 除霜加熱器 131646.doc •19- 200925536 23 24 25a 26 27 28 29 31 ❹ 32 33 34 35 38 41 磁鐵墊圈 開門裝置 前橫框 安裝構件 線圈 可動鐵心 螺線管（電動驅動源） 推出桿 開門開關 門開關 控制裝置 壓縮機 PWM形成電路（低電壓施加機構） EEPROM(記憶體機構）其他 (Other Embodiments) The present invention is not limited to the above-described embodiment (4) shown in the drawings, and may be expanded or changed as follows. The door opening device 24 for performing the freeze prevention operation is not limited to being installed in the freezer compartment 3, and the present invention can be applied to prevent the operation of the door opening device disposed in the freezer compartment. The mechanism for applying a low voltage to the door opening device 24 is not limited to those based on the pWM method. It can also be applied to the coil 27 by stepping down the commercial AC power supply by the transformer. Further, it may be a configuration in which the commercial alternating current power source is changed to a low voltage by phase control and applied to the coil 27. The electric drive source of the door opening device 24 is not limited to the solenoid 29 . For example, it is also possible to open the door 10 by using a motor as an electric drive source, for example, by rotating the rack and the pinion into a linear motion. The freezing prevention operation in this case is performed by applying a low voltage to the coil of the motor. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side elevational view showing a longitudinal portion of a peripheral portion of a door opening device according to a third embodiment of the present invention. Fig. 2 of the system shows a flow chart showing the control of the freeze prevention operation of the door opening device. Figure 3 is a side view of the refrigerator shown broken. Figure 4 shows the front side of the refrigerator. Fig. 5 is a block diagram showing an electrical configuration. Fig. 6 is a view corresponding to Fig. 2 showing a second embodiment of the present invention. Fig. 7 is a view corresponding to Fig. 2 showing a third embodiment of the present invention. Fig. 8 is a view corresponding to Fig. 2 showing a fourth embodiment of the present invention. Fig. 9 is a view corresponding to Fig. 5 showing a fifth embodiment of the present invention. [Main component symbol description] 3 5 9 10 Refrigerator main freezer compartment (storage room) Small freezer compartment door movable handle container cover sheet cover sheet 10a 14 15a 15b 17 Cooler 18 Fan 19 Outlet 21 Defrost heater 131646.doc •19- 200925536 23 24 25a 26 27 28 29 31 ❹ 32 33 34 35 38 41 Magnet washer door opener Front cross frame mounting member Coil movable iron solenoid (electric drive source) Push lever open door switch door switch control unit compressor PWM Forming a circuit (low voltage application mechanism) EEPROM (memory mechanism)
131646.doc -20-131646.doc -20-