JPS5872846A - Air cooling device - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 本発明は冷房装置に関する。[Detailed description of the invention] The present invention relates to a cooling device.

電子計算機や通信機器（以下、電算機等という）の如く
大量の半導体素子等を使用する装置がかなりの発熱を伴
なうことは一般に広く知られているところであり、例え
ば電算機等を設置してなる部屋（以下、Ｎ算機室等とい
う）の発熱量は一般事務所の略３倍の５００〜６００　
ｋｃａ、／７ｈ−ｍ″にも達する場合がある。しかして
近年の建築構造は冷暖房効率を高める親点から断熱性に
優れた建築材料を用いるのが一般的であるため、電算機
等の排熱は冬期や春、秋等の中間期においても自然放熱
されず、ここに′市し）機室等を夏期のみならず通年冷
房して電算機等の環境条件を一定に保つ必要が生じる。It is generally known that equipment that uses a large number of semiconductor elements, such as electronic computers and communication equipment (hereinafter referred to as "computers, etc."), generates a considerable amount of heat. The calorific value of a room (hereinafter referred to as N computer room, etc.) is 500 to 600, which is approximately three times that of a general office.
kca, /7h-m''.However, in recent years, building structures have generally used building materials with excellent heat insulation properties to increase cooling and heating efficiency, so waste materials such as computers have been used. Heat is not dissipated naturally even during the winter, spring, and autumn, and heat is dissipated naturally.) It is necessary to maintain a constant environmental condition for computers, etc. by cooling machine rooms not only in the summer, but throughout the year.

第１図はかかる点に鑑みて構成された従来の冷房装置を
示すものであり、冷房機本体１内には圧縮器２、凝縮器
３、膨張弁４および蒸発器５からなる冷媒サイクルが形
成され、蒸発ａ５内の冷媒の気化による冷熱をファン６
により送風し、床［等を介して電算機室等の室内に供給
すると共に、凝縮器３の排熱を冷却塔７から冷却水ボン
デ８を介した冷却水により熱交換し、またはファンを用
いた空冷式の熱交換を行なっている。FIG. 1 shows a conventional cooling system constructed in consideration of the above points, in which a refrigerant cycle consisting of a compressor 2, a condenser 3, an expansion valve 4, and an evaporator 5 is formed within the main body 1 of the cooling system. The cooling heat generated by the evaporation of the refrigerant in the evaporator a5 is transferred to the fan 6.
At the same time, the exhaust heat from the condenser 3 is exchanged with cooling water from the cooling tower 7 through the cooling water bonder 8, or by using a fan. Air-cooled heat exchange is performed.

しかしながらこの種の冷房装置において、その冷房能力
は最暑期を想定して設定しなくてはならず、このため外
気が寒冷な中間期や冬期においても最暑期の冷房能力で
運転されることとなり、年間を膚じて最暑期における電
力が消費されエネルギーの浪費であると共に極めて不経
済であるという欠点があった。オた中間期や冬期に自然
放熱量が増加するとしても、過冷却を防止するために蒸
発器５に近接１−２て配置された再熱ヒータ−９が稼動
するため、電力消費着は結局、通年で略一定となって工
不ルヂーの利用効率が悪いものであった。However, in this type of cooling system, its cooling capacity must be set assuming the hottest season, so even in the middle and winter months when the outside air is cold, it will be operated at the cooling capacity of the hottest season. The disadvantage is that electricity is consumed during the hottest season of the year, which is a waste of energy and is extremely uneconomical. Even if the amount of natural heat dissipation increases during the intermediate and winter seasons, the reheat heater 9, which is placed close to the evaporator 5 in order to prevent overcooling, operates, so power consumption eventually decreases. , which remained almost constant throughout the year, resulting in poor utilization efficiency of manufactory.

本発明は成上の点に鑑み提案されたものであり、その目
的とするところは圧縮機、凝縮器、蒸発器等からなる第
１の冷媒サイクルに加えて第２の冷媒サイクルを形成し
、外気が寒冷な冬期等においては圧縮機を運転すること
なく第２の冷媒サイクルの冷媒の自然循環により冷房を
行なうようにし、更に寒冷期における冷却水の冷熱を蓄
熱して冷房に利用することとして市′力消費１Ｗの節減
を図り省エネルギー化をｊうｈ成すると共に、冷房コス
トの低減を可能ならしめた、電算機室等の空調に使用し
て好適な冷房装置を提供するにある。The present invention has been proposed in view of the above points, and its purpose is to form a second refrigerant cycle in addition to a first refrigerant cycle consisting of a compressor, a condenser, an evaporator, etc. In winter, when the outside air is cold, the air conditioner is cooled by the natural circulation of the refrigerant in the second refrigerant cycle without operating the compressor, and the cold heat of the cooling water during the cold season is stored and used for air conditioning. To provide a cooling device suitable for use in air conditioning a computer room, etc., which achieves energy conservation by reducing city power consumption of 1 W, and also enables reduction of cooling costs.

以下、図に沿って本発明の実施例を詳細にｇ）１゜明す
る。Hereinafter, embodiments of the present invention will be explained in detail with reference to the drawings.

第２図は本発明にかかる冷房装置の全体の溝成を示すも
ので、冷房機本体ｌ内には圧縮機２、第１の凝縮器３、
膨張弁４および第１の蒸発藷５からなる第１の冷媒サイ
クルが形成されている。冷房機本体１の土部には蓄熱熱
交換器１（）が器５の上方に近接して設けられた第２の
蒸発器１３に連庸している。なお、凝縮器１１、・ａ路
１２および蒸発２ｔ１３内にはフロンガスの如き冷媒が
封入され、ここに第２の冷媒サイクルが形成されている
。ここで第２の凝縮器１１は第２の蒸発器１３よりも高
所に設置されるものである。FIG. 2 shows the overall structure of the cooling device according to the present invention, in which a compressor 2, a first condenser 3,
A first refrigerant cycle consisting of an expansion valve 4 and a first evaporator 5 is formed. A regenerative heat exchanger 1 ( ) is connected to a second evaporator 13 provided above and close to the container 5 in the soil part of the air conditioner main body 1 . Note that a refrigerant such as fluorocarbon gas is sealed in the condenser 11, the a-path 12, and the evaporator 2t13, forming a second refrigerant cycle. Here, the second condenser 11 is installed higher than the second evaporator 13.

蓄熱熱交換器１０の構造は第３図に示すとおりであり、
同図において１４は後述する如く冷却塔７から供給され
る冷却水が冷却水ボンｆ８を介して通水される管路で、
この管路１４ハ蓄熱熱交換器１０の内部に充填された蓄
熱材１５の内部を経て、蓄熱熱交換器１０の外部へと至
っている。凝縮器１１はこの管路１４の内部に挿・ｍさ
れており、凝縮器１１の内部の気化された冷媒が管路１
４内の冷却水によって再び凝縮液化されるようになって
いる。The structure of the regenerative heat exchanger 10 is as shown in FIG.
In the figure, reference numeral 14 denotes a pipe through which cooling water supplied from the cooling tower 7 passes through a cooling water bottle f8, as will be described later.
This conduit 14 passes through the heat storage material 15 filled inside the heat storage heat exchanger 10 and reaches the outside of the heat storage heat exchanger 10 . The condenser 11 is inserted into the pipe 14, and the vaporized refrigerant inside the condenser 11 flows into the pipe 14.
It is designed to be condensed and liquefied again by the cooling water in 4.

再び第２図において、屋外に設けられた冷却塔７の給水
側の管路１６はベイパス用の三方弁１７を経て冷却水ボ
ンデ８に至り、冷却水・ピンｆ８から出た管路１８け蓄
熱熱交換器１０の管路】４に連通し、この管路１４は管
路１９および三方弁２０を介して凝縮器３に至っている
と共に凝縮器３から出た管路２１け玉方弁２２および管
路９３を介して冷却塔７に達している。また、三方弁＋
７　、９０　、　！２と管路’、’３　、１８　、１９
との間には、夫々冷却塔７、管路１４、凝縮器３への冷
却水の供給をパイ・セスするための・げ路２４１２５　
、２６が設けられている。Referring again to FIG. 2, the pipe 16 on the water supply side of the cooling tower 7 installed outdoors passes through the three-way valve 17 for the bay pass, reaches the cooling water bond 8, and the pipe 18 exiting from the cooling water pin f8 is used for heat storage. 4 of the heat exchanger 10, and this pipe 14 reaches the condenser 3 via a pipe 19 and a three-way valve 20, and also connects a pipe 21 exiting from the condenser 3 with a three-way valve 22 and a three-way valve 22. It reaches the cooling tower 7 via a pipe 93. Also, three-way valve +
7, 90, ! 2 and pipe line', '3, 18, 19
There are channels 24125 for supplying cooling water to the cooling tower 7, pipe 14, and condenser 3, respectively.
, 26 are provided.

なお、三方弁１７には冷却水の温度を検出して三方弁１
７を切換えるための０ＦＡｉ検出器２７が付設されてい
ると共に、冷房機本体１内の圧縮機２にはファン６から
床下Ｆを介して送風される冷気の温度を検出する温度検
出器２８が接続されている。また第２図中、３１　ｉｌ
、ｔエアフィルターである。In addition, the three-way valve 17 detects the temperature of the cooling water and operates the three-way valve 1.
A temperature detector 28 is connected to the compressor 2 in the air conditioner body 1 to detect the temperature of cold air blown from the fan 6 through the underfloor F. has been done. Also, in Figure 2, 31 il
, t air filter.

次にこの動作を説明する。Next, this operation will be explained.

先ず、夏ルｊ等において外気温が高い場合には通常の冷
房を行う。すなわち圧縮機２によって圧縮された冷媒は
第１の凝縮器３にて冷却水によシ冷却され液化する。こ
の液化された冷媒は膨張弁４で減圧され第１の蒸発器５
に入る。この蒸発器５において冷媒が気化する際にファ
ン６によって冷房機本体ｌ内に吸入される空気から気化
熱を奪い、かかる冷却された空気が床下Ｆから電算機室
等の室内へと送られる。First, when the outside temperature is high, such as during summer, normal cooling is performed. That is, the refrigerant compressed by the compressor 2 is cooled by cooling water in the first condenser 3 and liquefied. This liquefied refrigerant is depressurized by the expansion valve 4 and is transferred to the first evaporator 5.
to go into. When the refrigerant is vaporized in the evaporator 5, the fan 6 removes the heat of vaporization from the air sucked into the air conditioner main body l, and the cooled air is sent from the underfloor F to a room such as a computer room.

次に冬期や中間期、捷たは１日の寒暖差が大きい地域で
の夜間等、外気が寒冷な時期において、冷却塔７の冷却
水温度が室内温度よりも低くなった場合にこれを温度検
出器″２７　、　ＨＵＢによって検出し、三方弁２０　
、２２を切り換えて冷却水？ンノ８からの冷却水を管路
１８、蓄熱熱交換器１０内の管路１４、管路１９、ペイ
・母ス用の管路２６、三方弁２２．管路２３の経路で供
給すると共に、圧縮機２を停止せしめ、また冷却水の過
冷却防止のために三方弁１７を冷却塔７経由の通水をな
すように固定する。Next, when the temperature of the cooling water in the cooling tower 7 becomes lower than the indoor temperature during periods when the outside air is cold, such as during the winter, mid-season, or at night in areas with large temperature differences during the day, the temperature Detector "27, detected by HUB, three-way valve 20
, switch 22 to coolant? The cooling water from the pipe 8 is transferred to a pipe 18, a pipe 14 and a pipe 19 in the heat storage heat exchanger 10, a pipe 26 for pay/master, a three-way valve 22. At the same time, the compressor 2 is stopped, and the three-way valve 17 is fixed to allow water to flow through the cooling tower 7 to prevent overcooling of the cooling water.

しかして蓄熱熱交換器ＩＯ内においては、第２の凝縮器
１１が管路１４の冷却水により冷却され、第２の蒸発器
１３との間に温ＩＷ差が生じると、それまで凝縮器１１
と蒸発器１３との温度が等しく飽和状態にあった冷媒は
蒸発器１３内で気化する。However, in the regenerative heat exchanger IO, when the second condenser 11 is cooled by the cooling water in the pipe 14 and a temperature IW difference occurs between the second condenser 11 and the second evaporator 13, the condenser 11
The refrigerant, which has the same temperature as that of the evaporator 13 and is in a saturated state, vaporizes within the evaporator 13.

この時冷房機本体ｌに吸入された空気は気化熱を奪われ
て冷却され、ファン６により床下Ｆへと送り出されて室
内を冷房する。同時に、気化した冷媒は管路１２を上昇
して凝縮ａｌｌに至り、この凝縮器１１で再び冷却液化
されて落差により蒸発器１３へと戻る。その後、蒸発器
１３では凝縮器１１との温度差により冷媒が再び気化さ
れ、以後はこの蒸発器１３と凝縮器１１との間の冷媒の
自然循環により、気化熱を奪われて冷却された空気が継
続的に電算機室等の室内に供給され、環境温＋ｉｌが一
定に保たれるものである。At this time, the air sucked into the air conditioner main body 1 is cooled by being deprived of vaporization heat, and is sent to the underfloor F by the fan 6 to cool the room. At the same time, the vaporized refrigerant ascends through the pipe 12 and reaches the condenser all, where it is again cooled and liquefied in the condenser 11 and returns to the evaporator 13 by the head. After that, the refrigerant is vaporized again in the evaporator 13 due to the temperature difference with the condenser 11, and from then on, the natural circulation of the refrigerant between the evaporator 13 and the condenser 11 takes away the heat of vaporization and cools the air. is continuously supplied to a room such as a computer room, and the environmental temperature +il is kept constant.

また、蓄熱熱交換器１０では外気温が低ｌ／）時の冷却
水の冷熱を蓄熱材１５に貯えることができるため、外気
温が上昇して冷却水に冷媒の自然循環を行なわせる程変
の冷却能力がなくなった場合には、三方弁′２０を切換
えて蓄熱熱交換器１０−＼の冷却水をペイ・ｆスさせ、
蓄熱材１５の冷熱によって凝縮４１１を冷却せしめ得、
冷媒の自然循環による冷房を継続することができる。そ
の後、蓄熱材１５の蓄熱が飽和状態となり冷熱源となり
得なくなった場合には、温度検出器２８がファン６から
の冷気の温度からこれを検出し、三方弁２２の切換えに
より冷却水を第１の凝縮器３に通水して圧縮機２を運転
し、第１の冷媒サイクルによる従来の冷房システムに切
換えればよい。In addition, since the thermal storage heat exchanger 10 can store the cold heat of the cooling water in the heat storage material 15 when the outside temperature is low (l/), it is possible to store the cold heat of the cooling water in the heat storage material 15. When the cooling ability of
The condensate 411 can be cooled by the cold heat of the heat storage material 15,
Cooling can be continued through natural circulation of refrigerant. After that, when the heat storage in the heat storage material 15 reaches a saturated state and can no longer serve as a cold heat source, the temperature detector 28 detects this from the temperature of the cold air from the fan 6, and switches the three-way valve 22 to switch the cooling water to the first It is sufficient to operate the compressor 2 by passing water through the condenser 3 and switch to a conventional cooling system using the first refrigerant cycle.

本発明では季節の温度差や一日のうちの外気温の変化に
応じて冷却水を蓄熱熱交換″ｅｒ１０に導入し、冷媒の
自然循環によって冷気を作り出すようにしたから、従来
の如く冬期や中間期における過冷却現象を生じることが
なく、再熱ヒータ−９も稼動することがない。In the present invention, cooling water is introduced into the thermal storage heat exchanger 10 according to seasonal temperature differences and changes in outside temperature during the day, and cold air is created by natural circulation of the refrigerant. No supercooling phenomenon occurs in the intermediate period, and the reheat heater 9 does not operate.

なお、以上の実施例では冷却塔７を循環する冷却水を用
いて第２の凝縮器１１を冷却している自然冷却したり、
またけファン３０によって強制冷却することも可能であ
る。In addition, in the above embodiment, the second condenser 11 is cooled by natural cooling using the cooling water circulating in the cooling tower 7,
It is also possible to perform forced cooling using the straddle fan 30.

更に第４図（ロ）に示すように、冷房機本体ｌと蓄熱熱
交換器１０とを分離して蓄熱熱交換器】０を屋外に設置
したうえで管路２９を同図（イ）の如く自然冷却し、も
しくはファン順により強制冷却してもよい。ここで第４
図（イ）、（ロ）中、人、Ｂは夫夫共通する管路の接続
部分を示している。Furthermore, as shown in Fig. 4 (b), the cooling unit l and the regenerative heat exchanger 10 are separated, the regenerative heat exchanger 0 is installed outdoors, and the conduit 29 is connected as shown in Fig. 4 (a). Natural cooling may be performed as described above, or forced cooling may be performed using a fan order. Here the fourth
In Figures (A) and (B), person and B indicate the connecting part of the conduit that is common to both husband and wife.

第５図は第２の蒸発器１３の設置位置を種々変更した例
であり、第５図（イ）に示す如く蓄熱熱交換器１０を冷
房機本体１と分離して設けると共に、第２の凝縮器１１
に連通ずる蒸発器１３をファン６からの空気が通過する
床下Ｆの途中や室内への送気口近傍に設け、あるいは同
図（ロ）に示すように天井Ｇの近傍に蓄熱熱交換器１０
を設けてこれよりやや下方に蒸発器１３を設置し、室内
の上部から冷気を供給するように構成してもよい。なお
第５図（（イ）、（ロ）中、Ｃ，Ｄは夫々共通する管路
の接続部分を示す。この場合、蓄熱熱交換器１０の管路
１４に供給する冷却水は前記した如く冷却塔７を循環さ
せるもののみならず、自然冷却やファン３０による強制
冷却等の空冷式であってもよいことは言うまでもない。FIG. 5 shows an example in which the installation position of the second evaporator 13 is changed in various ways. As shown in FIG. Condenser 11
An evaporator 13 that communicates with the fan 6 is installed in the middle of the underfloor F through which the air passes or near the air outlet into the room, or a regenerative heat exchanger 10 is installed near the ceiling G as shown in FIG.
It may be configured such that the evaporator 13 is installed slightly below the evaporator 13 and cool air is supplied from the upper part of the room. In addition, C and D in FIG. 5 ((a) and (b) respectively indicate the common connection parts of the pipes. In this case, the cooling water supplied to the pipes 14 of the thermal storage heat exchanger 10 is as described above. It goes without saying that the cooling tower 7 is not limited to a circulating type, but may be an air cooling type such as natural cooling or forced cooling using the fan 30.

これら第４図および第５図の実施例に共通して言えるこ
とは第２の凝縮器１１をこれに連通ずる第２の蒸発器１
３よりも高所に設置するという点であり、これによって
冷媒の自然循環が保証され、本発明による効率の良い冷
房が担保されるもので、かかる凝縮器１１と蒸発２へ１
３との位置関係が守られる限り、冷却水の冷却方法や蒸
発器１３の設置位置の変更は適宜行い得るものである。What is common to the embodiments shown in FIGS. 4 and 5 is that the second evaporator 1 communicates with the second condenser 11.
3. This ensures natural circulation of the refrigerant and ensures efficient cooling according to the present invention.
As long as the positional relationship with evaporator 13 is maintained, the method of cooling the cooling water and the installation position of evaporator 13 can be changed as appropriate.

以上述べたように本発明によれば、第１の冷媒サイクル
に加えて、冷媒の自然循環を可能とした第２の蒸発器お
よび凝縮器からなる第２の冷媒サイクルを形成し、冬期
や中間期、または夜間等、外気が寒冷な時には圧縮機の
運転を停止して第１の冷媒サイクルを休止させると共に
冷却水の循環を第２の凝縮器側に切換えるようにしたか
ら、第２の蒸発器と凝縮器との間で冷媒の気化、循環、
凝縮液化が自動的に行なわれ、単に冷却水ポンプやファ
ン等のみの運転によって電算機室等の冷房が行なえる効
果があり、特に冬期や中間期等の電力消費を少なくして
＋ｉ年で平均４０〜５０チの電、力消費１０節減が可能
となる利点がある。As described above, according to the present invention, in addition to the first refrigerant cycle, a second refrigerant cycle consisting of a second evaporator and a condenser that enable natural circulation of the refrigerant is formed, and When the outside air is cold, such as during the winter or at night, the compressor is stopped, the first refrigerant cycle is stopped, and the circulation of cooling water is switched to the second condenser. Vaporization and circulation of refrigerant between the container and the condenser,
Condensation and liquefaction occur automatically, which has the effect of cooling computer rooms, etc. simply by operating the cooling water pump and fan, etc., and reduces power consumption, especially in winter and intermediate seasons, resulting in an average increase in +i years. There is an advantage that power consumption can be reduced by 10% by 40 to 50%.

また蓄熱熱交換器の蓄熱作用により冷却水の冷却能力が
低下した場合でも第２の凝縮器を冷却し得るためエネル
ギーの利用効率が良く、更に一日の寒暖差の太き込地穢
では蓄熱材の蓄熱、排熱のサイクルが夜間蓄熱、昼間υ
１熱の如く短いため蓄熱による第２の凝縮器の冷却が通
年でも可能であり、これによって略９０〜９５チの電力
消費址の大幅な節減も期待でき、従来の如く過熱ヒータ
ーの稼動が不要であることとも相俟って顕著な省エネル
ギー効果および経済性を奏するものである。In addition, even if the cooling capacity of the cooling water decreases due to the heat storage effect of the heat storage heat exchanger, the second condenser can be cooled, resulting in high energy usage efficiency. The cycle of heat storage and exhaust heat in the material is heat storage at night and υ during the day.
Since it is as short as 1 heat, it is possible to cool the second condenser by storing heat throughout the year, and this can be expected to significantly reduce power consumption by approximately 90 to 95 inches, and there is no need to operate a superheater like in the past. Coupled with this, it has a remarkable energy saving effect and economical efficiency.

加えて第１の冷媒サイクルを有する従来の各種冷房装置
に第２の冷媒サイクルを構成する蒸発器や凝縮器、その
他僅かな部品を付加するだけで全体が構成できるから、
従来設備の有効利用が図れる等の利点を有する。In addition, the entire system can be configured by simply adding the evaporator, condenser, and other few parts that make up the second refrigerant cycle to various conventional cooling devices that have the first refrigerant cycle.
It has the advantage of making effective use of conventional equipment.

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

第１図は従来の冷房装置の説明図、第２図乃至第５図は
本発明の実施例を示すもので第２図は全体の構成を示す
説明図、第３図は蓄熱熱交換器の断面図５第４図（イ）
、（ロ）および第５図（イ）。 （ロ）は夫々他の実施例の説明図である。 ２・・・圧縮機、３・・第１の凝縮器、４・・・膨張弁
、５・・・第１の蒸発器、１０・・・蓄熱熱交換器、１
１・・第２の凝縮器、１２・・管路、１３・・・第２の
蒸発層、１４・・・管路、１５・・・蓄熱材。 才　１　区Fig. 1 is an explanatory diagram of a conventional cooling device, Figs. 2 to 5 show an embodiment of the present invention, Fig. 2 is an explanatory diagram showing the overall configuration, and Fig. 3 is an explanatory diagram of a regenerative heat exchanger. Cross-sectional view 5 Figure 4 (a)
, (b) and Figure 5 (a). (B) is an explanatory diagram of each other embodiment. 2... Compressor, 3... First condenser, 4... Expansion valve, 5... First evaporator, 10... Regenerative heat exchanger, 1
1... Second condenser, 12... Pipe line, 13... Second evaporation layer, 14... Pipe line, 15... Heat storage material. Sai 1 Ward

Claims (1)

【特許請求の範囲】[Claims] 第１の冷媒サイクルを形成する圧縮機、第１の凝縮器、
膨張弁および第１の蒸発器を備え、第１の凝縮器を屋外
を循環する冷却水にて冷却するようにした冷房装置にお
いて、第２の蒸発器とこの蒸発器に連通しかつ第２の蒸
発器よりも高所に設置される第２の凝縮器とにより第２
の冷媒サイクルを形成すると共に、第２の凝縮器を蓄熱
材が充填されてなる蓄熱熱交換器内例前記冷却水が供給
される管路と共に配設し、外気が寒冷な時に前記冷却水
の通水を第１の凝縮器側から第２の凝縮器側に切換えて
前記圧縮機の運転を停止し、かつ必要に応じて第２の凝
縮器への前記冷却水の通水を停止して前記蓄熱材に貯え
られた冷熱により第２の凝縮器を冷却するようにしたこ
とを特徴とする冷房装置。a compressor forming a first refrigerant cycle; a first condenser;
A cooling device including an expansion valve and a first evaporator, the first condenser being cooled by cooling water circulating outdoors, the cooling device being connected to a second evaporator and the second evaporator. A second condenser is installed at a higher place than the evaporator.
A refrigerant cycle is formed, and a second condenser is disposed in the heat storage heat exchanger filled with a heat storage material together with a pipe to which the cooling water is supplied, so that when the outside air is cold, the cooling water is Switching water flow from the first condenser side to the second condenser side to stop operation of the compressor, and stopping the flow of the cooling water to the second condenser as necessary. A cooling device characterized in that a second condenser is cooled by cold heat stored in the heat storage material.