JPH0224067Y2 - - Google Patents

Description

【考案の詳細な説明】 （産業上の利用分野） 本案は家庭用、業務用等の冷蔵庫、冷凍庫等に
於ける庫内温度維持装置に関するものである。[Detailed description of the invention] (Field of industrial application) This invention relates to an internal temperature maintenance device for refrigerators, freezers, etc. for home and commercial use.

（従来の技術） 従来の冷蔵庫、冷凍庫は例えば実公昭58−
10946号に示されているように、開閉扉を有する
庫内に冷部器を内装したものと、実公昭58−
33514号に示されているように開閉扉の代わりに
開口上部から空気を吹き出し、開口下部より空気
を吸入する所謂エアカーテン方式のものが存在す
る。(Prior art) Conventional refrigerators and freezers are, for example,
As shown in No. 10946, there is a refrigerator with an internal refrigerator that has an opening/closing door, and a
As shown in No. 33514, instead of using an opening/closing door, there is a so-called air curtain system in which air is blown out from the upper part of the opening and air is sucked in from the lower part of the opening.

（考案が解決しようとする課題） 扉を有する冷蔵庫等に収納された食品を当該冷
蔵庫から取り出すために扉の開閉を行うと、庫内
冷気が庫外に流出し、外部暖気が庫内に流入す
る。このため扉の開閉毎に庫内温度が上昇し、こ
れに伴つて冷部器（コンプレツサー）も余分に作
動しなければならなく、開閉が頻繁になる程冷却
効率が悪化する。更に外部暖気の侵入により庫内
の霜付着も多くなり冷却能力が低下する。そこで
開閉扉の他に更にエアカーテンを施した二重構造
も考えられるが、冷蔵庫等の扉の開閉時間は短い
（１分以下）ので、前述した従来のエアカーテン
機構を常時作動せしめておくことは非常に不経済
である。又開閉時のみにエアカーテン機構を作動
せしめれば良いことは容易に推察され得るが、従
来の循環方式のエアカーテン機構では扉の開放と
同時に作動せしめたとしても、その立ち上がり時
間（スイツチオンから充分なカーテン機能を生ず
るまでの時間）に庫内冷気が流出するので効率的
であるとは云えない。(Problem to be solved by the invention) When the door is opened and closed to take out food stored in a refrigerator, etc., which has a door, cold air inside the refrigerator flows out of the refrigerator, and warm air from the outside flows into the refrigerator. do. For this reason, the temperature inside the refrigerator rises every time the door is opened and closed, and the compressor has to work extra, and the more frequently the door is opened and closed, the worse the cooling efficiency becomes. Furthermore, the intrusion of external warm air causes more frost to build up inside the refrigerator, reducing the cooling capacity. Therefore, a double structure with an air curtain in addition to the opening/closing door may be considered, but since the opening/closing time of refrigerator doors is short (1 minute or less), the conventional air curtain mechanism described above should be kept in operation at all times. is extremely uneconomical. Furthermore, it can be easily inferred that it is sufficient to operate the air curtain mechanism only when the door is opened or closed, but with conventional circulation type air curtain mechanisms, even if the air curtain mechanism is operated at the same time as the door is opened, the rise time (from the switch on to This cannot be said to be efficient because the cold air inside the refrigerator flows out during the time it takes for the curtain function to function.

（問題点を解決するための手段） 本案は前記問題点を解決するため、冷蔵庫等に
従来と異なるシステムのエアカーテン機構を付設
したものである。本案に係る冷蔵庫等の庫内温度
維持装置は、開閉扉を有する冷蔵庫に於て、庫内
前面上下に相対向せしめて設けた噴気口及び吸気
口と、前記噴気口と開閉弁を介して連結すると共
に、予め高圧空気を貯蔵してなるエアタンクと、
前記吸気口と開閉弁を介し吸引側に連結したエア
ポンプと、扉の開閉で動作せしめられ、扉開放時
にのみ前記開閉弁を開放すると共にエアポンプを
作動させるスイツチとを具備してなることを特徴
とするものである。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a refrigerator or the like with an air curtain mechanism that is a different system from the conventional one. The internal temperature maintenance device for a refrigerator, etc. according to the present invention is a refrigerator having an opening/closing door, and has a blowhole and an intake port provided facing each other in the upper and lower front surfaces of the refrigerator, and the blowhole is connected to the blowhole via an on-off valve. In addition, an air tank that stores high-pressure air in advance,
The air pump is characterized by comprising an air pump connected to the suction side through the intake port and an on-off valve, and a switch that is operated by opening and closing the door and opens the on-off valve and operates the air pump only when the door is opened. It is something to do.

（作用） 冷蔵庫等の扉を開くとスイツチが動作してエア
タンクと噴気口が連通し、噴気口より空気が吹き
出されると共に、エアポンプが作動して吸気口よ
り吹き出し空気を吸入して庫内前面にエアカーテ
ンが形成されるもので、特にエアタンクに高圧空
気を貯蔵しておくためエアカーテン形成迄の立ち
上がり時間が非常に短く、このため庫内冷気の流
出を阻止できるものである。(Function) When the door of a refrigerator, etc. is opened, a switch operates and the air tank and the blower port communicate with each other, air is blown out from the blower port, and the air pump is activated to draw in the blown air from the intake port and send it to the front of the refrigerator. An air curtain is formed in the refrigerator.In particular, since high-pressure air is stored in an air tank, the rise time until the air curtain is formed is very short, and therefore the cold air inside the refrigerator can be prevented from flowing out.

（実施例） 本案の実施例を図面に基づいて次に説明する。(Example) An embodiment of the present invention will be described below based on the drawings.

第１図は冷凍冷蔵庫の庫内温度維持装置の一例
を示すものである。この冷凍庫Ａ及び冷蔵庫Ｂの
各庫内前面上方に、下向きの噴射ノズル（噴気
口）１を適当間隔で設けた噴射管２を配設し、各
庫内前面下方には上向きの吸気口３を同様に連設
した吸気管４を配設し、また冷凍庫Ａ及び冷蔵庫
Ｂには各扉の開閉で動作するマイクロスイツチ
５，５′を付設しておく。前記噴射管２は庫外に
設けたエアタンク６と連結配管すると共に、スイ
ツチ５，５′で開閉動作をなす電磁弁７を介在せ
しめる。またエアタンク６には圧縮空気供給用コ
ンプレツサー８及び該コンプレツサー制御用の圧
力スイツチ９を付設する。吸気管４はスイツチ
５，５′で作動する電磁弁７′を介して真空ポンプ
（エアポンプ）１０の吸引側と連結し、真空ポン
プ１０はスイツチ５，５′からの信号によつて作
動，停止を行う。 FIG. 1 shows an example of an internal temperature maintenance device for a refrigerator-freezer. An injection pipe 2 with downward injection nozzles (air vents) 1 provided at appropriate intervals is arranged above the front front of each of the freezers A and refrigerator B, and an upward air intake port 3 is provided below the front of each refrigerator. Similarly, a continuous intake pipe 4 is provided, and the freezer A and the refrigerator B are provided with micro switches 5, 5' which are operated by opening and closing each door. The injection pipe 2 is connected to an air tank 6 provided outside the refrigerator, and is also provided with a solenoid valve 7 which is opened and closed by switches 5 and 5'. The air tank 6 is also provided with a compressor 8 for supplying compressed air and a pressure switch 9 for controlling the compressor. The intake pipe 4 is connected to the suction side of a vacuum pump (air pump) 10 via a solenoid valve 7' operated by switches 5 and 5', and the vacuum pump 10 is activated and stopped by signals from switches 5 and 5'. I do.

而して冷蔵庫等の扉を開放するとスイツチ５，
５′が作動して電磁弁７，７′が開き、これと共に
真空ポンプが作動する。前記の作動が行われると
噴射ノズル１からエアタンク６の高圧空気が噴出
すると同時に吸気口３より噴出空気を吸引して庫
内前面にエアカーテンを形成するものである。又
エアタンク６内の圧力低下を圧力スイツチ９で感
知するとコンプレツサー８を駆動せしめてエアタ
ンク６内に圧縮空気を供給するものである。尚図
中１１は逆止弁である。 Then, when you open the door of the refrigerator, etc., switch 5,
5' is activated, solenoid valves 7 and 7' are opened, and at the same time, the vacuum pump is activated. When the above-mentioned operation is performed, high-pressure air from the air tank 6 is ejected from the injection nozzle 1, and at the same time, the ejected air is sucked from the intake port 3 to form an air curtain on the front surface of the inside of the refrigerator. When a pressure switch 9 detects a drop in pressure within the air tank 6, the compressor 8 is driven to supply compressed air into the air tank 6. In addition, numeral 11 in the figure is a check valve.

第２図は本案の第二実施例を示すもので、第二
実施例は前述の第一実施例のようにエアポンプ
（コンプレツサー８，真空ポンプ１０）を特に２
個使用せずに吸引用エアポンプと圧縮空気供給用
エアポンプとを兼ねたエアポンプ１２を用いた例
を示したものである。 FIG. 2 shows a second embodiment of the present invention, in which the air pump (compressor 8, vacuum pump 10) is specially
This example shows an example in which an air pump 12 is used which functions as both a suction air pump and a compressed air supply air pump without using a separate air pump.

尚本案は前記実施例に特定されるものではな
く、例えば扉の開閉を感知するスイツチを、光セ
ンサースイツチその他任意のスイツチにする等そ
の具体的詳細は任意に定めることができるもので
ある。 It should be noted that the present invention is not limited to the above-mentioned embodiments, and the specific details thereof can be arbitrarily determined, for example, the switch that detects the opening and closing of the door may be an optical sensor switch or any other arbitrary switch.

（考案の効果） 本案は従来の冷蔵庫等の高圧エアタンクを有す
るエアカーテン機構を装備したもので、扉の開閉
と同時に庫内前面にエアカーテンを形成するので
庫内の冷気が外部へ流出したり又は外部の暖気が
庫内に流入することがないので、扉の開閉による
庫内温度上昇を阻止できたものである。又エアカ
ーテンを形成する噴出空気は高圧状態で貯められ
外気温度迄低下しているので、噴出時の断熱膨張
によつて外気温度より低い温度となるので、庫内
温度維持により効果である。(Effects of the invention) This invention is a conventional refrigerator equipped with an air curtain mechanism that has a high-pressure air tank, and an air curtain is formed at the front of the refrigerator at the same time as the door is opened and closed, so that the cold air inside the refrigerator does not flow out to the outside. Also, since warm air from outside does not flow into the refrigerator, it is possible to prevent the temperature inside the refrigerator from rising due to opening and closing of the door. Furthermore, since the ejected air forming the air curtain is stored under high pressure and has been lowered to the outside air temperature, the temperature becomes lower than the outside air temperature due to adiabatic expansion at the time of ejection, which is more effective in maintaining the temperature inside the refrigerator.

【図面の簡単な説明】[Brief explanation of the drawing]

図は本案の実施例を示すもので、第１図は第一
実施例の簡便な配管図、第２図は同第二実施例を
示す配管図である。 １は噴射ノズル、２は噴射管、３は吸気口、４
は吸気管、５，５′はスイツチ、６はエアタンク、
７，７′は電磁弁、８はコンプレツサー、９は圧
力スイツチ、１０は真空ポンプ、１１は逆止弁、
１２は兼用エアポンプ。 The drawings show embodiments of the present invention; FIG. 1 is a simple piping diagram of the first embodiment, and FIG. 2 is a piping diagram of the second embodiment. 1 is the injection nozzle, 2 is the injection pipe, 3 is the intake port, 4
is the intake pipe, 5 and 5' are the switches, 6 is the air tank,
7, 7' are solenoid valves, 8 is a compressor, 9 is a pressure switch, 10 is a vacuum pump, 11 is a check valve,
12 is a dual-purpose air pump.

Claims (1)

【実用新案登録請求の範囲】 開閉扉を有する冷蔵庫に於て、 庫内前面上下に相対向せしめて設けた噴気口及
び吸気口と、 前記噴気口と開閉弁を介して連結すると共に、
予め高圧空気を貯蔵してなるエアタンクと、 前記吸気口と開閉弁を介し吸引側に連結したエ
アポンプと、 扉の開閉で動作せしめられ、扉開放時にのみ前
記開閉弁を開放すると共にエアポンプを作動させ
るスイツチと、 を具備してなることを特徴とする冷蔵庫等の庫内
温度維持装置。[Scope of Claim for Utility Model Registration] In a refrigerator having an opening/closing door, a fume port and an air intake port are provided facing each other at the top and bottom of the front surface of the refrigerator, and are connected to said fume port via an on-off valve, and
an air tank in which high-pressure air is stored in advance; an air pump connected to the suction side through the intake port and the on-off valve; and an air pump that is operated by opening and closing the door, and only when the door is opened, the on-off valve is opened and the air pump is activated. An internal temperature maintenance device for a refrigerator, etc., comprising: a switch;