200825353 九、發明說明： 【發明所屬之技術領域】 本發明係關於利用設置於內部之冷卻手段而冷卻貯 藏物品的冷卻庫。 【先前技術】 以往，在這種冷卻庫，因爲貯藏室內部的空氣被冷卻， 所以貯藏室內部之空氣壓力變成比外部的大氣壓低壓，而 發生打開隔熱門之動作係困難的問題。 作爲解決此問題的手段，將以下之構件設置於低溫 庫，隔熱箱，係具有利用隔熱門自由開閉地封閉開口之貯 藏室；門開閉裝置，係設置成對該隔熱門及隔熱箱可轉動， 並操作該隔熱門的開閉；調整口，係設置於該隔熱門並將 外部和該貯藏室連通；以及壓力調整蓋，係和該門開閉裝 置之轉動操作連動，並開閉該調整口，而作成即使低溫庫 係冷卻中，亦能以小的操作力操作隔熱門之開閉 [專利文獻1]特開平4 — 28989 【發明內容】 【發明要解決之課題】 可是，在這種構造之低溫庫，雖然和門開閉裝置之轉 動操作連動，並可打開用以開閉該調整口的壓力調整蓋， 但是因爲在即將進行門開閉裝置的轉動操作之前，貯藏室 內部之空氣壓力依然比外部的大氣壓低壓，所以具有係在 門開閉裝置之轉動操作的起始動作時，需要大的操作力之 問題。本發明係爲了解決這種問題點而開發者，其目的在 於提供一種冷卻庫，在利用設置於內部之冷卻手段而冷卻 200825353 貯藏物品的冷卻庫中，即使在門開閉裝置之轉動操作的起 始動作時亦不需要大的操作力，就可進行轉動操作，而且 以小的操作力可操作隔熱門之開閉。 【解決課題之方式】 爲了達成上述之目的，申請專利範圍第1項的發明係 一種冷卻庫，其設置有：隔熱箱，係利用隔熱門自由開閉 地封閉設置於貯藏室的開口；門打開裝置，係輔助該隔熱 門之打開；以及氣壓調整手段，係因應於隔熱箱外部和隔 熱箱內部之壓力差而進行動作，該冷卻庫之特徵爲：該氣 壓調整手段具備有：氣壓調整通路，係和隔熱箱外部及隔 熱箱內部連通；及止回閥，係設置於該氣壓調整通路內並 控制空氣的流通，該止回閥設置於比隔熱箱內部更接近隔 熱箱外部的位置。 又，申請專利範圍第2項之發明，其特徵爲，在申請 專利範圍第1項的發明中，該止回閥係塑膠製的止回閥， 其因應於止回閥的閥體本身重量和該壓力差而進行動作。 申請專利範圍第3項之發明，其特徵爲，在申請專利 範圍第1或2項的發明中，在該隔熱箱的外部面形成該氣 壓調整通路之外部側開口，而該外部側開口形成於比設置 於該氣壓調整通路內的止回閥更低的位置。 申請專利範圍第4項之發明，其特徵爲，在申請專利 範圍第3項的發明中，該氣壓調整通路係從該外部側開口 至止回閥設置部爲止大致朝向垂直方向延伸。 申請專利範圍第5項之發明，其特徵爲，在申請專利 範圍第3或4項的發明中，在該隔熱箱之外部側垂直面形 200825353 成凹部’並在該凹部的頂面形成該外部側開口。 申請專利範圍第6項之發明，其特徵爲，在申請專利 範圍第1至5項中任一項的發明中，該氣壓調整手段係設 置於隔熱門。 申請專利範圍第7項之發明，其特徵爲，在申請專利 範圍第1至6項中任一項的發明中，在該隔熱箱的內部面 形成該氣壓調整通路之內部側開口，而內部側開口形成於 比設置於該氣壓調整通路內的止回閥更低的位置。 【發明之效果】 若依據申請專利範圍第1項之發明，因爲利用因應於 隔熱箱外部和隔熱箱內部之壓力差而進行動作的氣壓調整 手段控制隔熱箱內外之壓力差，所以隔熱門之開閉係經常 容易，而且因爲設置於氣壓調整通路內之止回閥係被設置 於比隔熱箱內部更接近隔熱箱外部的位置，所以具有即使 隔熱箱內部變成會凍結之低溫狀態止回閥亦難發生結凍、 即使在低溫狀態氣壓調整手段亦產生作用的優點。 又，若依據申請專利範圍第2項之發明，因爲止回閥 係重量輕之塑膠製並因應於止回閥的閥體本身重量和該壓 力差而進行動作之止回閥，所以具有即使隔熱箱外部和隔 熱箱內部之壓力差係微小的壓力差，亦能確實地進行藉止 回閥之閥體而開閉動作之優點。 又，若依據申請專利範圍第3項之發明，因爲在隔熱 箱之外部面所形成的外部側開口形成於比設置於氣壓調整 通路內之止回閥更低的位置，所以具有即使冷卻庫設置於 灰塵等多之環境，灰塵等亦難滯留於止回閥，而氣壓調整 200825353 手段確實地產生作用的優I占。 又’若依據申請專利範圍第4項之發明，因爲氣壓調 整通路之從外部側開Q至止回閥設置部爲止係大致朝向垂 直方向延伸’所以具有即使冷卻庫設置於灰塵等多之環 境’亦更確實地灰塵等難滯留於止回閥，而氣壓調整手段 確實地產生作用的優點。 又’若依據申請專利範圍第5項之發明，因爲在該隔 熱箱之外部側垂直面形成凹部，並在該凹部的頂面形成該 外部側開口’所以具有灰塵等難經由外部側開口侵入止回 閥’而氣壓調整手段確實地產生作用，而且在門打開裝置 之一部分設置於該凹部的情況，氣壓調整通路之安裝係容 易的優點。 又’若依據申請專利範圍第6項之發明，因爲該氣壓 調整手段係設置於隔熱門，所以具有氣壓調整通路之安裝 係更容易的優點。 又，若依據申請專利範圍第7項之發明，因爲在隔熱 箱之內部面所形成的內部側開口形成於比設置於氣壓調整 通路內之止回閥更低的位置，所以來自隔熱箱內部面側之 灰塵等亦難滯留於止回閥，而具有氣壓調整手段確實地產 生作用的優點。 【實施方式】 其次，說明在圖式中本發明之實施例。第1圖係表示 冷卻庫之立體圖，第2圖係表示冷卻庫之縱向剖面圖，第 3圖係表示本實施例的縱向剖面圖，第4圖係表示本實施 例之縱向剖面細部圖，第5圖係表示其他的實施例之縱向 200825353 剖面圖。 冷卻庫1係由在底部具備有移動用之車輪2的隔熱箱 3所構成，而隔熱箱3具備有：貯藏室4，係將物品貯藏於 其內部；隔熱門5，係將設置於貯藏室4之開口封閉；以 及畜冷室6，係配置於貯藏室4的下方。在隔熱門5具備有 用以輔助隔熱門5之打開的門打開裝置7，而門打開裝置7 具備有：軸構件8，係在隔熱門5之縱向全長形成；未圖 示之一對槓桿，係形成於軸構件8的上下；桿把手9，係 ζ-s 形成於軸構件8的中間；以及桿上鎖件10，係限制桿把手 9的操作，藉由操作桿把手9而轉動形成於軸構件8之上下 的一對槓桿，以輔助隔熱門5之打開。 在此，門打開裝置7的軸構件8，爲了採用軸構件8 不會從隔熱門5之外部側垂直面1 1突出的構造，所以位於 隔熱門5之門厚內，被安裝於軸構件8的桿把手9和限制 桿把手9之操作的桿上鎖件1 〇亦一樣爲了採用不會從外部 側垂直面1 1突出之構造，所以在隔熱門5之外部側垂直面 π形成係在縱向剖面視爲凹形的凹部1 3，並將桿把手9和 桿上鎖件1 〇設置於凹部1 3的凹部底面1 4。 又，貯藏室4和蓄冷室6係利用隔板1 6而隔開，貯藏 室4和蓄冷室6係經由庫內管17而連通，並將庫內風扇馬 達18配置於庫內管17的上部。蓄冷室6在蓄冷室6和庫 內管1 7之連結部25的反側，將吸入口 1 9設置成和貯藏室 4連通，而在連結部25和吸入口 1 9之間配置蓄冷劑20及 用以冷卻蓄冷劑20和貯藏室4的冷卻裝置2 1。 又，在設置於隔熱箱3之上部的機械室2 2，爲了將冷 200825353 熱供給冷卻裝置2 1，而配設係周知之手段的壓縮機23或凝 結器24等。此外，在本實施例，雖然機械室22設置於隔 熱箱3之上部，但是亦可配置成和蓄冷室6相鄰。利用這 些構件，驅動庫內風扇馬達1 8時，貯藏室4的空氣經由吸 入口 19流入蓄冷室6,再在蓄冷室6內利用蓄冷劑20或冷 卻裝置2 1所冷卻之冷氣，利用庫內風扇馬達1 8通過庫內 管1 7並流入貯藏室4，藉此將貯藏室4冷卻至既定的溫度。 在隔熱門5，爲了控制隔熱箱外部27和隔熱箱內部28 / 之壓力差，而設置具備有氣壓調整通路3 0和止回閥3 1的 1 氣壓調整手段2 9。氣壓調整通路3 0貫穿隔熱門5並和隔熱 箱外部27及隔熱箱內部28連通，在隔熱門5之外部側垂 直面1 1所形成的凹部1 3之凹部頂面1 5形成外部側開口 3 2，又，在隔熱門5之內部側垂直面1 2形成內部側開口 3 3。 又，氣壓調整通路3 0係在比內部側開口 3 3更接近外部側 開口 3 2的位置有具備彎曲通路部4 9之大致L字形，氣壓 調整通路之從外部側開口 32至彎曲通路部49爲止形成爲 t ^ 大致垂直方向的直線形，而氣壓調整通路之從內部側開□200825353 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a cooling store for cooling a stored article by means of a cooling means provided inside. [Prior Art] Conventionally, in such a cooling store, since the air inside the storage compartment is cooled, the air pressure inside the storage compartment becomes lower than the external atmospheric pressure, and the operation of opening the heat insulating door is difficult. As a means for solving this problem, the following members are disposed in a low temperature storage chamber, and the heat insulation box has a storage chamber that is closed by opening and closing with an insulated door; the door opening and closing device is provided to the heat insulating door and the heat insulating box. Rotating and operating the opening and closing of the heat insulating door; the adjusting port is disposed on the heat insulating door and communicating the outside with the storage room; and the pressure adjusting cover is interlocked with the rotating operation of the door opening and closing device, and the adjusting port is opened and closed, In addition, it is possible to operate the opening and closing of the heat insulating door with a small operation force even in the case of cooling in a low temperature system [Patent Document 1] Japanese Patent Application Laid-Open No. Hei No. Hei. The library, although interlocked with the turning operation of the door opening and closing device, and opening the pressure adjusting cover for opening and closing the adjusting port, because the air pressure inside the storage chamber is still higher than the external atmospheric pressure immediately before the turning operation of the door opening and closing device Since it has a low pressure, it has a problem that a large operating force is required at the initial operation of the turning operation of the door opening and closing device. The present invention has been made in order to solve such a problem, and an object of the present invention is to provide a cooling library in which a cooling operation of a 200825353 storage article is cooled by a cooling means provided inside, even at the start of a rotation operation of the door opening and closing device When the operation is not required, a large operation force is not required, and the rotation operation can be performed, and the opening and closing of the heat insulation door can be operated with a small operation force. [Means for Solving the Problem] In order to achieve the above object, the invention of claim 1 is a cooling storage provided with a heat insulating box that closes an opening provided in the storage chamber by a heat insulating door; the door is opened The device assists the opening of the heat insulating door; and the air pressure adjusting means operates according to a pressure difference between the outside of the heat insulating box and the inside of the heat insulating box, wherein the cooling air tank is characterized in that: the air pressure adjusting means is provided with: air pressure adjusting The passage is connected to the outside of the heat insulation box and the inside of the heat insulation box; and the check valve is disposed in the air pressure adjustment passage and controls the circulation of the air, and the check valve is disposed closer to the heat insulation box than the inside of the heat insulation box External location. Further, the invention of claim 2 is characterized in that, in the invention of claim 1, the check valve is a plastic check valve which corresponds to the weight of the valve body itself of the check valve and This pressure difference operates. The invention of claim 3, characterized in that in the invention of claim 1 or 2, the outer side opening of the air pressure adjusting passage is formed on the outer surface of the heat insulating box, and the outer side opening is formed It is lower than the check valve disposed in the air pressure adjusting passage. According to a fourth aspect of the invention, in the third aspect of the invention, the air pressure adjusting passage extends substantially in a vertical direction from the outer side opening to the check valve installation portion. The invention of claim 5, characterized in that in the invention of claim 3 or 4, a vertical portion of the outer surface of the heat insulating box is formed as a recessed portion '200825353 and formed on the top surface of the recessed portion The outside side is open. The invention of claim 6 is characterized in that, in the invention of any one of claims 1 to 5, the air pressure adjusting means is provided in the heat insulating door. The invention of claim 7 is characterized in that, in the invention of any one of claims 1 to 6, the inner side opening of the air pressure adjusting passage is formed on the inner surface of the heat insulating box, and the inside is The side opening is formed at a lower position than the check valve provided in the air pressure adjusting passage. [Effect of the Invention] According to the invention of the first application of the patent application, since the pressure difference between the inside and the outside of the heat insulating box is controlled by the air pressure adjusting means that operates in accordance with the pressure difference between the outside of the heat insulating box and the inside of the heat insulating box, The popular opening and closing system is often easy, and since the check valve provided in the air pressure adjusting passage is disposed closer to the outside of the heat insulating box than the inside of the heat insulating box, it has a low temperature state even if the inside of the heat insulating box becomes frozen. It is also difficult for the check valve to freeze, even if the air pressure adjusting means acts at a low temperature. Further, according to the invention of claim 2, since the check valve is made of a plastic which is light in weight and operates in accordance with the weight of the valve body of the check valve and the pressure difference, there is even a check valve. The pressure difference between the outside of the heat box and the inside of the heat insulating box is a slight pressure difference, and the advantage of opening and closing the valve body of the return valve can be surely performed. Further, according to the invention of claim 3, since the outer side opening formed on the outer surface of the heat insulating box is formed at a lower position than the check valve provided in the air pressure adjusting passage, even if the cooling chamber is provided It is set in a dusty environment, dust, etc., and it is difficult to stay in the check valve, and the air pressure adjustment 200825353 means that the effect is excellent. In addition, according to the invention of the fourth aspect of the patent application, since the air pressure adjusting passage is opened from the external side to the check valve installation portion and extends substantially in the vertical direction, it has an environment in which the cooling chamber is installed in dust or the like. It is also more reliable that dust and the like are left in the check valve, and the air pressure adjusting means does have an advantage. According to the invention of claim 5, since the concave portion is formed on the outer surface of the outer surface of the heat insulating box, and the outer side opening is formed on the top surface of the concave portion, it is difficult to infiltrate through the outer side opening with dust or the like. The check valve' and the air pressure adjusting means are surely acted upon, and in the case where one of the door opening means is provided in the recessed portion, the installation of the air pressure adjusting passage is easy. Further, according to the invention of claim 6 of the patent application, since the air pressure adjusting means is provided in the heat insulating door, the installation of the air pressure adjusting passage is more advantageous. Further, according to the invention of claim 7 of the invention, since the inner side opening formed on the inner surface of the heat insulating box is formed at a lower position than the check valve provided in the air pressure adjusting passage, the heat insulating box is used. Dust or the like on the inner surface side is also difficult to stay in the check valve, and there is an advantage that the air pressure adjusting means surely acts. [Embodiment] Next, an embodiment of the present invention in the drawings will be described. 1 is a perspective view showing a cooling gallery, FIG. 2 is a longitudinal sectional view showing a cooling gallery, FIG. 3 is a longitudinal sectional view showing the embodiment, and FIG. 4 is a longitudinal sectional detail drawing of the present embodiment. Figure 5 is a longitudinal cross-sectional view of the other embodiment of 200825353. The cooling store 1 is composed of a heat insulating box 3 provided with a wheel 2 for movement at the bottom, and the heat insulating box 3 is provided with a storage compartment 4 for storing articles therein, and a heat insulating door 5 to be installed The opening of the storage compartment 4 is closed; and the animal cooling compartment 6 is disposed below the storage compartment 4. The heat insulating door 5 is provided with a door opening device 7 for assisting the opening of the heat insulating door 5, and the door opening device 7 is provided with a shaft member 8 which is formed in the longitudinal full length of the heat insulating door 5; Formed on the upper and lower sides of the shaft member 8; a lever handle 9, a ζ-s formed in the middle of the shaft member 8; and a lever upper lock member 10 for restricting the operation of the lever handle 9, which is formed by the operation of the lever handle 9 to be formed on the shaft A pair of levers above and below the member 8 to assist in the opening of the insulated door 5. Here, the shaft member 8 of the door opening device 7 is attached to the shaft member 8 in the door thickness of the heat insulating door 5 in order to prevent the shaft member 8 from protruding from the outer side vertical surface 11 of the heat insulating door 5. The lever handle 9 and the lever lock member 1 that operates the restriction lever handle 9 are also formed in the vertical direction on the outer side of the heat insulating door 5 in order to adopt a configuration that does not protrude from the outer side vertical surface 11 The cross section is regarded as a concave recess 13 and the lever handle 9 and the lever upper locking member 1 are disposed on the concave bottom surface 14 of the recess 13 . Further, the storage chamber 4 and the cold storage chamber 6 are partitioned by the partition plate 16, and the storage chamber 4 and the cold storage chamber 6 are communicated via the inner tube 17, and the in-compartment fan motor 18 is disposed in the upper portion of the inner tube 17. . The cold storage chamber 6 is disposed on the opposite side of the connection portion 25 of the cold storage chamber 6 and the inner tube 17 to connect the suction port 19 to the storage chamber 4, and the cool storage agent 20 is disposed between the connection portion 25 and the suction port 19. And a cooling device 21 for cooling the coolant 20 and the storage chamber 4. Further, in the machine room 22 provided in the upper portion of the heat insulating box 3, a compressor 23, a condenser 24, and the like which are well-known means are disposed in order to supply the cold 200825353 to the cooling device 21. Further, in the present embodiment, although the machine room 22 is provided above the heat insulating box 3, it may be disposed adjacent to the cold storage chamber 6. When the fan motor 18 in the storage unit is driven by these members, the air in the storage chamber 4 flows into the regenerator 6 through the suction port 19, and the cold air cooled by the refrigerating agent 20 or the cooling device 21 in the regenerator 6 is utilized. The fan motor 18 passes through the inner tube 17 and flows into the storage chamber 4, thereby cooling the storage chamber 4 to a predetermined temperature. In the heat insulating door 5, in order to control the pressure difference between the outside of the heat insulating box 27 and the inside of the heat insulating box 28, a gas pressure adjusting means 2 9 including a gas pressure adjusting passage 30 and a check valve 3 1 is provided. The air pressure adjusting passage 30 penetrates the heat insulating door 5 and communicates with the heat insulating box outer portion 27 and the heat insulating box inner portion 28, and the concave portion top surface 15 of the concave portion 13 formed on the outer side vertical surface 1 of the heat insulating door 5 forms an outer side. The opening 3 2, in turn, forms an inner side opening 3 3 on the inner side vertical surface 12 of the heat insulating door 5. Further, the air pressure adjusting passage 30 has a substantially L shape including the curved passage portion 49 at a position closer to the outer side opening 3 2 than the inner side opening 3 3, and the air pressure adjusting passage from the outer side opening 32 to the curved passage portion 49 It is formed as a straight line in the direction of t ^ in the vertical direction, and the air pressure adjusting passage is opened from the inner side.
\^：J 3 3至彎曲通路部4 9爲止形成爲大致水平方向的直線形。此 外，雖然氣壓調整通路之從外部側開口 3 2至彎曲通路部49 爲止形成爲大致垂直方向的直線形，但是亦可係緩和的曲 線形。 ， 在此，在本實施形態，將如隔熱門5之外部側垂直面 1 1或在外部側垂直面1 1所形成之凹部1 3的凹部頂面丄5 般，接觸外氣的面稱爲隔熱箱外部面3 4，而將如隔熱門5 的內部側垂直面1 2般接觸隔熱箱3之內部空間的面稱爲隔 -10- 200825353 熱箱內部面35。氣壓調整通路30之和通路方向垂直的截面 係圓形’成爲空氣從隔熱箱外部側（以下，稱爲上游側）向 隔熱箱內部側（以下，稱爲下游側）流通的通路。 氣壓調整通路30之從外部側開口 32至彎曲通路部49 之間雖然令空氣從上游側向下游側流通，但是內設有用以 防止向反方向流通之周知的手段之止回閥3 1。止回閥3 1 係由以下之構件構成，閥體3 6，係利用下游側和上游側的 壓力差（以下，稱爲內外壓力差）和本身之重量的平衡而可 r、 移動；及開閉路37,係藉由閥體36之可移動而開閉通路。 閥體3 6係由以下之構件形成，閥部3 8，係由位於下游側之 圓柱部3 9和位於上游側且錐面40朝向上游側的圓錐部4 1 形成；及導銷42，係垂設於圓柱部39之下游側並用以令閥 體3 6可圓滑地移動，又，開閉路3 7具備有：大徑通路部 43，係位於下游側且直徑比閥部38之圓柱部39大；小徑 通路部44，係位於上游側且直徑比圓柱部3 9小；錐狀之閥 體承部45，係位於大徑通路部43和小徑通路部44之間’ p 並和圓錐部4 1的錐面40接觸；以及導件承部46 ’係固定 k 於大徑通路部43並插設導銷42，在無內外壓力差的情況’ 在閥部38之錐面40和開閉路37的閥體承部45接觸之狀 態，閥體36位於開閉路37內。此外’在導件承部46鑽設 空氣流通用的孔，使得即使在隔熱箱內部28被冷卻’因壓 力降低而產生內外壓力差，閥體3 6朝向下游方向移動’而 圓柱部3 9之下游側面和導件承部46接觸的情況’空氣# 流動。 閥體36之材質係塑膠，以使閥體36的重量變輕。止 -11 - 200825353 回閥31在閥體36之本身重量比內外壓力差更大的 即，在隔熱箱內部2 8尙未被充分冷卻之狀態’閥骨 於下方，因爲錐面4 0和閥體承部4 5接觸’而開閉δ 閉，空氣不流通。另一方面’隔熱箱內部2 8已被冷 生內外壓力差，在內外壓力差比閥體36之自重更 況，閥體3 6朝向下游方向移動’因爲錐面4 〇和閥 4 5分開，而開閉路3 7打開’空氣從隔熱箱外部2 7 熱箱內部2 8，而內外壓力差消失。此外’在本實施 然止回閥3 1採用如上述所示之構造’但是例如即使 等其他的形狀，亦只要利用閥體3 6之本身重量和內 羞的平衡，而令氣壓調整通路3 0內之空氣朝向隔熱 2 8方向流通，且防止朝向隔熱箱外部27方向之流通 都可。 因爲採用利用以輕量合成樹脂製之閥體3 6之 內外壓力差的平衡而控制氣壓調整通路30之空氣 構造，即使內外壓力差係微小的情況，閥體3 6亦確 作，而可防止隔熱箱內部28之壓力降低。又，內設 調整通路3 0之止回閥3 1，因爲位於比隔熱箱內部 近隔熱箱外部27的位置，所以難受到隔熱箱內部 溫影響。因此，即使隔熱箱內部2 8係冰點以下，亦 回閥3 1難因霜等而結凍，所以止回閥3 1確實地動 可防止隔熱箱內部2 8之壓力降低。 此外，氣壓調整通路3 0之從外部側開口 3 2至 回閥3 1的位置爲止係至少大致垂直方向的線狀，g 側開口 3 2位於比設置止回閥3 1之位置更低的位灃 情況， ! 36位 各37關 卻而產 大的情 體承部 流向隔 例，雖 係球狀 外壓力 箱內部 的構造 自重和 流通的 實地動 於氣壓 28更接 28之低 :因爲止 [作，而 :設置止 丨爲外部 ;，所以 -12 - 200825353 和設置成大致水平方向之線狀相比，外氣之灰塵等難經由 外部側開口 3 2侵入氣壓調整通路內，因爲對止回閥3 1的 動作不會引起妨礙，所以可防止隔熱箱內部28之壓力降 低。又，因爲在設置用以構成門打開裝置7之桿把手9和 桿上鎖件1 0的凹部1 3之凹部頂面1 5形成外部側開口 32 ’ 所以從正面看不到在凹部頂面1 5所形成的外部側開口 3 2，而外觀上係良好，易於大致垂直地安裝氣壓調整通路 3 0之隔熱門5的孔加工。 f、 此外，在本實施例，雖然採用利用閥體36之自重和內 外壓力差的平衡而控制氣壓調整通路30之空氣流通的構 造，但是在因爲隔熱箱內部28變成過冷卻而內外壓力差變 大之冷卻庫1的情況，亦可係利用彈簧等之彈性體的彈力 和內外壓力差之平衡而閥體3 6動作，或者閥體3 6本身係 具有彈性體之材料，並利用閥體3 6本身的彈力和內外壓力 差之平衡而閥體36動作的構造。 在第5圖表示其他的實施形態。此外，在本實施例對 於和上述之實施例共同的構造，使用共同之名稱和符號。 氣壓調整通路3 0貫穿隔熱門5並和隔熱箱外部27及隔熱 箱內部2 8連通，在隔熱門5之外部側垂直面1 1形成外部 側開口 47，而在隔熱門5之內部側垂直面1 2形成內部側開 口 48。又，氣壓調整通路30係位於外部側開口 47和內部 側開口 4 8之大致中間而且具備有位於比外部側開口 4 7及 內部側開口 4 8更上方之彎曲通路部49的大致L字形，氣 壓調整通路之從外部側開口 47至彎曲通路部49爲止係傾 斜成大致3 0度的直線形，而氣壓調整通路之從內部側開口 -13- 200825353 4 8至彎曲通路部4 9爲止係傾斜成大致3 0度的直線形。止 回閥31內設於氣壓調整通路之從外部側開口 4 7至彎曲通 路部49之間。此外，因爲止回閥3 1之構造係和前面的實 施例相同，所以省略說明。 若依據本實施例，如在隔熱門5未形成凹部1 3之隔熱 門5的外部側垂直面1 1形成外部側開口 47的情況，或者， 不是在隔熱門5而在隔熱箱3之其他的隔熱箱外部面3 4形 成外部側開口 47的情況般，即使係從外部側開口 47至彎 曲通路部49爲止無法形成爲大致垂直方向的直線形，亦因 爲外部側開口 47及內部側開口 48形成於比彎曲通路部49 更低的位置，所以外氣或隔熱箱內部2 8之灰塵等難經由外 部側開口 47或內部側開口 48侵入，因爲對止回閥3 1的動 作不會引起妨礙，所以可確實防止隔熱箱內部28之壓力降 低。在本實施例，雖然氣壓調整通路之從兩開口 4 7、4 8至 彎曲通路部4 9爲止係傾斜成大致3 0度的直線形，但是只 要係止回閥3 1動作的角度，亦可係其他的角度。又，雖然 I 止回閥31內設於氣壓調整通路30，但是亦可將止回閥31 安裝於隔熱箱外部面34，以令止回閥3 1之開閉路37和氣 壓調整通路30連通。 【圖式簡單說明】 第1圖係冷卻庫之立體圖。 第2圖係冷卻庫之縱向剖面圖。 第3圖係在隔熱門之氣壓調整手段的縱向剖面圖。 第4圖係止回閥之縱向剖面細部圖。 第5圖係在其他的實施例之氣壓調整手段的縱向剖面 -14- 200825353 圖。 【主要元件符號說明】 3 隔 熱 箱 4 貯 藏 室 5 隔 熱 門 7 門 打 開 裝 置 27 隔 熱 箱 外 部 28 隔 熱 箱 內 部 29 氣 壓 調 整 手 段 30 氣 壓 調 整 通 路 3 1 止 回 閥\^: J 3 3 is formed into a substantially horizontal straight line until the curved passage portion 49. Further, although the air pressure adjusting passage is formed in a substantially straight linear shape from the outer side opening 3 2 to the curved passage portion 49, it may be a gently curved shape. Here, in the present embodiment, the outer surface vertical surface 11 of the heat insulating door 5 or the concave top surface 丄5 of the concave portion 13 formed by the outer side vertical surface 1 1 is called a surface that contacts the outside air. The outer surface of the heat shield box 34, and the surface of the heat insulating box 5, such as the inner side vertical surface 12 of the heat insulating door 5, is referred to as a heat exchanger inner surface 35. The cross section perpendicular to the direction of the passage of the air pressure adjusting passage 30 is circular. The passage of air from the outside of the heat insulating box (hereinafter referred to as the upstream side) to the inside of the heat insulating box (hereinafter referred to as the downstream side). The air pressure adjusting passage 30 allows air to flow from the upstream side to the downstream side from the outer side opening 32 to the curved passage portion 49, but is provided with a check valve 31 for preventing a known means of circulating in the opposite direction. The check valve 3 1 is composed of the following members, and the valve body 36 is rotatably movable by the balance of the pressure difference between the downstream side and the upstream side (hereinafter referred to as the internal/external pressure difference) and its own weight; and opening and closing The passage 37 is opened and closed by the movable movement of the valve body 36. The valve body 36 is formed of the following members, and the valve portion 38 is formed by a cylindrical portion 39 located on the downstream side and a conical portion 4 1 located on the upstream side and facing the upstream side of the tapered surface 40; and a guide pin 42 The downstream side of the cylindrical portion 39 is provided to allow the valve body 36 to smoothly move. Further, the opening and closing path 37 is provided with a large diameter passage portion 43 which is located on the downstream side and has a diameter smaller than the cylindrical portion 39 of the valve portion 38. The small diameter passage portion 44 is located on the upstream side and has a smaller diameter than the cylindrical portion 39; the tapered valve body portion 45 is located between the large diameter passage portion 43 and the small diameter passage portion 44 'p and the cone The tapered surface 40 of the portion 41 is in contact with each other; and the guide receiving portion 46' is fixed to the large-diameter passage portion 43 and the guide pin 42 is inserted, and the tapered surface 40 of the valve portion 38 is opened and closed without the pressure difference between the inner and the outer portions. The valve body 36 is located in the opening and closing path 37 in a state where the valve body portion 45 of the road 37 is in contact with each other. Further, 'the hole of the air flow is drilled in the guide bearing portion 46, so that even if the inside of the heat insulation box 28 is cooled, the internal and external pressure difference is generated due to the pressure drop, the valve body 36 moves toward the downstream direction' and the cylindrical portion 39 When the downstream side is in contact with the guide holder 46, the air # flows. The material of the valve body 36 is plastic to make the weight of the valve body 36 light. -11 - 200825353 The return valve 31 has a larger internal pressure difference than the inner and outer pressures of the valve body 36, that is, the inside of the heat insulation box is not sufficiently cooled in the state of 2 8 ' 'the valve bone is below, because the cone surface 40 and The valve body receiving portion 4 5 is in contact with 'opening and closing δ closed, and air does not flow. On the other hand, the inside of the heat-insulating box 28 has been subjected to a pressure difference between the inside and outside of the cold, and the internal and external pressure difference is higher than the self-weight of the valve body 36, and the valve body 36 moves toward the downstream direction because the cone 4 〇 and the valve 4 5 are separated. While opening and closing the road 3 7 open 'air from the outside of the heat insulation box 2 7 inside the hot box 2, while the internal and external pressure difference disappears. Further, 'in the present embodiment, the check valve 31 is configured as described above. However, for example, even if other shapes are used, the air pressure adjusting passage 3 is made only by utilizing the balance of the weight and the internal shame of the valve body 36. The inside air flows in the direction of the heat insulating 28 and is prevented from flowing toward the outside of the heat insulating box 27. Since the air structure of the air pressure adjusting passage 30 is controlled by the balance of the pressure difference between the inside and the outside of the valve body 36 made of a lightweight synthetic resin, the valve body 36 can be prevented even if the internal and external pressure difference is small, and it can be prevented. The pressure inside the heat shield box 28 is lowered. Further, since the check valve 3 1 of the adjustment passage 30 is provided at a position closer to the outer portion 27 of the heat insulating box than the inside of the heat insulating box, it is hard to be affected by the internal temperature of the heat insulating box. Therefore, even if the inside of the heat insulating box is below the freezing point, the check valve 31 is hardly frozen by frost or the like, so that the check valve 31 is surely moved to prevent the pressure inside the heat insulating box 28 from being lowered. Further, the position of the air pressure adjusting passage 30 from the outer side opening 3 2 to the return valve 31 is linear in at least a substantially vertical direction, and the g side opening 3 2 is located lower than the position at which the check valve 31 is provided.沣 , ! ! 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 In addition, the stagnation is set to the outside; therefore, -12 - 200825353 is difficult to pass through the external side opening 3 2 into the air pressure adjusting passage as compared with the line shape which is set in the substantially horizontal direction. The operation of the valve 31 is not hindered, so that the pressure inside the heat insulating box 28 can be prevented from being lowered. Further, since the outer side opening 32' is formed in the concave top surface 15 of the recess 13 which is provided to constitute the door opening device 7 and the recess 10 of the lever upper member 10, the top surface of the recess is not visible from the front side. The outer side opening 3 2 formed is 5, and the appearance is good, and it is easy to mount the hole of the heat insulating door 5 of the air pressure adjusting passage 30 substantially vertically. f. Further, in the present embodiment, the configuration in which the air flow of the air pressure adjusting passage 30 is controlled by the balance of the dead weight of the valve body 36 and the pressure difference between the inside and the outside is employed, but the internal and external pressure difference is caused by the inside of the heat insulating box 28 being supercooled. In the case of the enlarged cooling chamber 1, the valve body 36 may be operated by the elastic force of the elastic body such as a spring and the balance of the internal and external pressure differences, or the valve body 36 itself may have an elastic material and utilize the valve body. 3 6 The structure of the valve body 36 is operated by the balance between the elastic force and the internal and external pressure difference. Fig. 5 shows another embodiment. Further, in the present embodiment, a common name and symbol are used for the configuration common to the above embodiments. The air pressure adjusting passage 30 penetrates the heat insulating door 5 and communicates with the heat insulating box outer portion 27 and the heat insulating box inner portion 28, and the outer side vertical surface 11 of the heat insulating door 5 forms an outer side opening 47, and the inner side of the heat insulating door 5 The vertical face 12 forms an inner side opening 48. Further, the air pressure adjusting passage 30 is located substantially in the middle of the outer side opening 47 and the inner side opening 48, and has a substantially L shape in which the curved passage portion 49 is located above the outer side opening 47 and the inner side opening 4 8 . The adjustment passage is inclined in a straight line shape of approximately 30 degrees from the outer side opening 47 to the curved passage portion 49, and the air pressure adjusting passage is inclined from the inner side opening-13-200825353 4 8 to the curved passage portion 49. A linear shape of approximately 30 degrees. The check valve 31 is provided between the outer side opening 47 and the curved passage portion 49 in the air pressure adjusting passage. Further, since the structure of the check valve 31 is the same as that of the previous embodiment, the description is omitted. According to the present embodiment, the outer side opening 47 is formed on the outer side vertical surface 11 of the heat insulating door 5 in which the heat insulating door 5 is not formed, or the heat insulating door 5 is not in the heat insulating box 5 In the case where the outer surface opening 47 of the heat insulating box is formed, the outer side opening 47 is not formed in a substantially vertical straight line from the outer side opening 47 to the curved passage portion 49, and the outer side opening 47 and the inner side opening are also opened. 48 is formed at a position lower than the curved passage portion 49, so that dust or the like inside the outside air or the heat insulating box 28 is hard to enter through the external side opening 47 or the internal side opening 48 because the operation of the check valve 31 is not This causes an obstacle, so that the pressure inside the heat insulating box 28 can be surely lowered. In the present embodiment, the air pressure adjusting passage is inclined to have a linear shape of approximately 30 degrees from the two openings 4 7 and 48 to the curved passage portion 49. However, as long as the angle of the return valve 31 is controlled, Other angles. Further, although the I check valve 31 is provided in the air pressure adjusting passage 30, the check valve 31 may be attached to the outer surface 34 of the heat insulating box to connect the opening and closing path 37 of the check valve 31 with the air pressure adjusting passage 30. . [Simple description of the drawing] Figure 1 is a perspective view of the cooling library. Figure 2 is a longitudinal section of the cooling gallery. Figure 3 is a longitudinal sectional view of the air pressure adjusting means of the heat insulating door. Figure 4 is a longitudinal section detail view of the check valve. Fig. 5 is a longitudinal section of the air pressure adjusting means of the other embodiment -14-200825353. [Main component symbol description] 3 Heat insulation box 4 Storage room 5 Heat insulation door 7 Door opening device 27 Heat insulation box External part 28 Heat insulation box Inner part 29 Air pressure adjustment section 30 Air pressure adjustment passage 3 1 Check valve