JP2007108915A - Cooling device and vending machine - Google Patents

Cooling device and vending machine Download PDF

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JP2007108915A
JP2007108915A JP2005297414A JP2005297414A JP2007108915A JP 2007108915 A JP2007108915 A JP 2007108915A JP 2005297414 A JP2005297414 A JP 2005297414A JP 2005297414 A JP2005297414 A JP 2005297414A JP 2007108915 A JP2007108915 A JP 2007108915A
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refrigerant
stage
heat exchanger
cooling device
stage compression
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Toshiaki Tsuchiya
敏章 土屋
Koji Takiguchi
浩司 滝口
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Fuji Electric Retail Systems Co Ltd
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Fuji Electric Retail Systems Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device and a vending machine equipped with the cooling device capable of improving compressor efficiency and reducing power consumption by attaining the low compression ratio of a two-stage compressor in heat pump operation. <P>SOLUTION: The cooling device 100 has the two-stage compressor 1 provided with a first stage compression part 1a and a second stage compression part 1b; a first stage heat exchanger 2 and a second stage heat exchanger 3; an expansion mechanism 4; evaporators 7a, 7b, 7c evaporating or condensing a refrigerant; and first heat exchanger by-pass piping 11 with an on-off valve 11v installed to directly connect the outlet side of the first stage compression part 1a to the inlet side of the second stage compression part 1b. A warm refrigerant is compressed flowing directly into the second stage compression part 1b from the first stage compression part 1a without going through the first stage heat exchanger 2 and then supplied to the evaporators 7b, 7c to release heat, and flows into an electronic expansion valve 4 via the second stage heat exchanger 3. The adiabatically expanded cold refrigerant is supplied to the evaporator 7a to release cold. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、冷却および加熱を同時にする冷却装置、および、缶、ビン、パック、ペットボトル等の容器に入れた飲料等の商品を冷却または加熱して販売に供する自動販売機に関する。   The present invention relates to a cooling device that performs cooling and heating at the same time, and a vending machine that cools or heats products such as beverages contained in containers such as cans, bottles, packs, and PET bottles for sale.

自動販売機の商品収納庫を冷却するための冷却ユニットは、冷媒を圧縮する圧縮機と、該圧縮機により圧縮された冷媒(高圧高温冷媒に同じ)を冷却する放熱器と、該放熱器により冷却された冷媒を膨張する膨張機構と、該膨張機構により膨張された冷媒(低圧低温冷媒に同じ)を蒸発させる複数の蒸発器と、該複数の蒸発器のうち所定の蒸発器に対して前記冷媒を供給する冷媒分配手段とを有する。
そして、蒸発器は各商品収納庫内に設置され、これに収納された商品を冷却している。なお、商品収納庫は、収納する商品の種類や季節に応じて加熱用として使用されることがあり、このとき、当該商品収納庫は別途設置される通電ヒータによって加熱されるものである。
The cooling unit for cooling the commodity storage of the vending machine includes a compressor that compresses the refrigerant, a radiator that cools the refrigerant compressed by the compressor (same as high-pressure and high-temperature refrigerant), and the radiator. An expansion mechanism that expands the cooled refrigerant, a plurality of evaporators that evaporate the refrigerant expanded by the expansion mechanism (same as the low-pressure low-temperature refrigerant), and a predetermined evaporator among the plurality of evaporators. Refrigerant distribution means for supplying the refrigerant.
And an evaporator is installed in each goods storage, and the goods stored in this are cooled. The product storage is sometimes used for heating depending on the type and season of the product to be stored. At this time, the product storage is heated by a separately installed energizing heater.

また、各商品収納庫内に設置されている蒸発器を放熱器(凝縮器に同じ)として機能させ、その蒸発器に高圧高温冷媒を流して高圧高温冷媒(ホットガスに同じ)の温熱を利用して各商品収納庫内を加熱する「ヒートポンプ運転」により、通電ヒータの撤去および省電力効果を高めた自動販売機の庫内冷却、加熱装置が開示されている(例えば、特許文献1参照)。   Moreover, the evaporator installed in each product storage is made to function as a radiator (same as a condenser), and the high-pressure and high-temperature refrigerant (same as hot gas) is used by flowing high-pressure and high-temperature refrigerant through the evaporator. In addition, by “heat pump operation” that heats the inside of each product storage, a cooling and heating device for the vending machine that has improved the power saving effect by removing the energizing heater is disclosed (for example, see Patent Document 1). .

特開平05−233941号公報(第3−4頁、図1)Japanese Patent Laid-Open No. 05-233941 (page 3-4, FIG. 1)

ところで、前記特許文献に開示された発明は、環境にやさしいCO2(二酸化炭素)冷媒を採用することにより、該冷媒の特徴である圧縮後の高い吐出温度が有効に利用されることから、一層の省電力効果が得られることになる。
しかしながら、該発明を自動販売機の商品収納庫における「加熱室」にしようとすると、商品温度を約55℃に保持する必要があり、商品をかかる高温に保持するためには約60℃の空気温度が必要となる。このため該発明によるヒートポンプ運転によって加熱すると、以下の問題があった。
By the way, the invention disclosed in the above-mentioned patent document employs an environmentally friendly CO 2 (carbon dioxide) refrigerant so that the high discharge temperature after compression, which is a feature of the refrigerant, is effectively used. The power saving effect can be obtained.
However, if the invention is to be a “heating chamber” in a vending machine's product storage, the product temperature needs to be maintained at about 55 ° C., and in order to keep the product at such a high temperature, air at about 60 ° C. Temperature is required. For this reason, when heated by the heat pump operation according to the present invention, there are the following problems.

(あ)冷媒を高温とするために圧力を高くしなくてはならないので、運転効率が低下し、消費電力量が増加する。
(い)外気温度が低いと圧縮機の吸入温度が低下し、吐出温度も低くなるため、熱量が不足する。
(う)また、二段圧縮機および中間熱交換器を有する場合、二段圧縮後に冷媒が保有している温熱が中間熱交換器において放散されるため、加熱室において有効利用される量が減少する。
(A) Since the pressure has to be increased in order to increase the temperature of the refrigerant, the operation efficiency is lowered and the power consumption is increased.
(Ii) When the outside air temperature is low, the intake temperature of the compressor is lowered and the discharge temperature is also lowered, so that the amount of heat is insufficient.
(U) In addition, when a two-stage compressor and an intermediate heat exchanger are provided, the amount of heat that is effectively used in the heating chamber is reduced because the heat held by the refrigerant after the two-stage compression is dissipated in the intermediate heat exchanger. To do.

そこで、本発明は、前記問題を解決するためになされたものであって、ヒートポンプ運転において二段圧縮機の低圧縮比化を可能にし、圧縮機効率の向上、消費電力の低減を図ることができる冷却装置およびこれを装備した自動販売機を提供することを目的とする。   Therefore, the present invention has been made to solve the above-described problems, and enables a reduction in the compression ratio of a two-stage compressor in heat pump operation, thereby improving compressor efficiency and reducing power consumption. An object of the present invention is to provide a cooling device that can be used and a vending machine equipped with the cooling device.

(1)本発明に係る冷却装置(請求項1)は、冷媒をそれぞれ所定圧力にまで圧縮する一段目圧縮部および二段目圧縮部を具備する二段圧縮機と、冷媒を冷却する熱交換器と、冷媒を膨張させる膨張機構と、冷媒を蒸発または凝縮させる複数の蒸発器と、を有するものであって、
冷媒を前記一段目圧縮部の出側から前記二段目圧縮部の入側に直接供給自在にしたことを特徴とする。
(1) A cooling device according to the present invention (Claim 1) includes a first-stage compressor that compresses a refrigerant to a predetermined pressure and a second-stage compressor that includes a second-stage compressor, and heat exchange that cools the refrigerant. And an expansion mechanism for expanding the refrigerant, and a plurality of evaporators for evaporating or condensing the refrigerant,
The refrigerant can be directly supplied from the outlet side of the first-stage compression unit to the entry side of the second-stage compression unit.

(2)本発明に係る冷却装置(請求項2)は、冷媒を所定圧力にまで圧縮する二段圧縮機の一段目圧縮部と、
該一段目圧縮部において圧縮された冷媒が供給され、これを冷却する一段目熱交換器と、
該一段目熱交換器において冷却された冷媒が供給され、これを前記所定圧力より高い圧力にまで圧縮する二段圧縮機の二段目圧縮部と、
該二段目圧縮部において圧縮された冷媒が供給され、これを冷却する二段目熱交換器と、
該二段目熱交換器において冷却された冷媒が供給され、これを膨張させる膨張機構と、
該膨張機構において膨張された冷媒または前記二段目圧縮部において圧縮された冷媒が供給され、これを蒸発または凝縮させる複数の蒸発器と、
前記二段圧縮機の一段目圧縮部の出側と前記一段目熱交換器の入側とを開閉弁を介して連結する一段目圧縮冷媒配管と、
前記一段目熱交換器の出側と前記二段圧縮機の二段目圧縮部の入側とを連結する一段目冷却冷媒配管と、
前記二段圧縮機の二段目圧縮部の出側と前記二段目熱交換器の入側とを開閉弁を介して連結する二段目圧縮冷媒配管と
前記二段目熱交換器の出側と前記膨張機構の入側とを連結する二段目冷却冷媒配管と、
前記膨張機構の出側と前記複数の蒸発器の入側とを開閉弁を介して連結する冷熱冷媒送り配管と、
前記複数の蒸発器の出側と前記二段圧縮機の一段目圧縮部の入側とを連結する冷熱冷媒戻り配管と、を有するものであって、
前記複数の蒸発器の一部が冷媒を蒸発する専用蒸発器とし、その他の蒸発器が冷媒を蒸発または凝縮する兼用蒸発器とし、
前記二段圧縮機の一段目圧縮部の出側と二段目圧縮部の入側とを開閉弁を介して連結する一段目熱交換器バイパス配管と、
前記二段圧縮機の二段目圧縮部の出側と前記兼用蒸発器の入側とを開閉弁および逆止弁を介して連結する温熱冷媒送り配管と、
前記兼用蒸発器の冷熱冷媒戻り配管から分岐して、前記兼用蒸発器の出側と前記二段目熱交換器の入側とを逆止弁を介して連結する温熱冷媒戻り配管と、
前記兼用蒸発器の冷熱冷媒戻り配管の前記分岐位置より前記二段圧縮機の一段目圧縮部寄りに設置された開閉弁とを有することを特徴とする。
(2) A cooling device according to the present invention (Claim 2) includes a first-stage compression unit of a two-stage compressor that compresses the refrigerant to a predetermined pressure,
A first stage heat exchanger that is supplied with the refrigerant compressed in the first stage compression section and cools the refrigerant;
A refrigerant cooled in the first-stage heat exchanger is supplied, and a second-stage compression section of a two-stage compressor that compresses the refrigerant to a pressure higher than the predetermined pressure;
A second stage heat exchanger that is supplied with the refrigerant compressed in the second stage compression section and cools the refrigerant;
An expansion mechanism for supplying the refrigerant cooled in the second-stage heat exchanger and expanding the refrigerant;
A plurality of evaporators which are supplied with the refrigerant expanded in the expansion mechanism or the refrigerant compressed in the second-stage compression unit, and evaporate or condense the refrigerant;
A first-stage compressed refrigerant pipe that connects an outlet side of the first-stage compression unit of the second-stage compressor and an inlet side of the first-stage heat exchanger via an on-off valve;
A first-stage cooling refrigerant pipe connecting the outlet side of the first-stage heat exchanger and the inlet side of the second-stage compression unit of the second-stage compressor;
A second-stage compressed refrigerant pipe connecting the outlet side of the second-stage compressor of the second-stage compressor and the inlet side of the second-stage heat exchanger via an on-off valve; and the outlet of the second-stage heat exchanger A second-stage cooling refrigerant pipe connecting the side and the inlet side of the expansion mechanism;
A cooling / refrigerant refrigerant feed pipe connecting the outlet side of the expansion mechanism and the inlet side of the plurality of evaporators via an on-off valve;
A cold refrigerant return pipe connecting the outlet side of the plurality of evaporators and the inlet side of the first stage compression unit of the two-stage compressor,
A part of the plurality of evaporators is a dedicated evaporator that evaporates the refrigerant, and the other evaporator is a combined evaporator that evaporates or condenses the refrigerant,
A first-stage heat exchanger bypass pipe that connects an outlet side of the first-stage compression section of the second-stage compressor and an inlet side of the second-stage compression section via an on-off valve;
A hot refrigerant feed pipe connecting the outlet side of the second-stage compressor of the two-stage compressor and the inlet side of the dual-use evaporator via an on-off valve and a check valve;
A hot refrigerant return pipe that branches off from the cold refrigerant return pipe of the dual-purpose evaporator and connects the outlet side of the dual-purpose evaporator and the inlet side of the second-stage heat exchanger via a check valve;
And an on-off valve installed closer to the first-stage compression portion of the two-stage compressor than the branch position of the cold refrigerant return pipe of the dual-purpose evaporator.

(3)本発明に係る冷却装置(請求項3)は、前記二段目圧縮冷媒配管を通過する冷媒と前記冷熱冷媒戻り配管を通過する冷媒との間で熱交換する、第一熱回収手段を有することを特徴とする。   (3) The cooling device according to the present invention (Claim 3) is a first heat recovery means for exchanging heat between the refrigerant passing through the second-stage compressed refrigerant pipe and the refrigerant passing through the cold refrigerant return pipe. It is characterized by having.

(4)本発明に係る冷却装置(請求項4)は、前記温熱冷媒戻り配管を通過する冷媒と前記冷熱冷媒戻り配管を通過する冷媒との間で熱交換する第二熱回収手段を有することを特徴とする。   (4) The cooling device according to the present invention (Claim 4) has second heat recovery means for exchanging heat between the refrigerant passing through the hot refrigerant return pipe and the refrigerant passing through the cold refrigerant return pipe. It is characterized by.

(5)本発明に係る冷却装置(請求項5)は、前記冷媒が二酸化炭素(CO2)であるため、該冷媒の特徴である圧縮後の高い吐出温度が有効に利用されることから、一層の省電力効果が得られることになる。 (5) In the cooling device according to the present invention (Claim 5), since the refrigerant is carbon dioxide (CO 2 ), a high discharge temperature after compression, which is a characteristic of the refrigerant, is effectively used. A further power saving effect can be obtained.

(6)また、本発明に係る自動販売機(請求項6)は、断熱材によって囲まれ一面に開口部を具備する筐体と、該筐体を複数の商品収納庫に分割する仕切板と、前記商品収納庫のそれぞれに対応する商品搬出口を具備し、前記開口部を開閉する断熱扉と、前記商品収納庫のそれぞれに配置され、商品を収納して順次下方に搬出する機能を有する商品ラックと、前記商品ラックから落下した商品を前記商品搬出口に誘導するシュータと、該シュータの下方に配置されて前記商品収納庫内の空気を冷却または加熱する収納庫内熱交換手段と、該収納庫内熱交換手段を通過する空気の流れを形成する送風手段と、前記冷却手段によって冷却された空気を前記商品ラックの内部を経由して前記送風手段に循環させるための循環ダクトとを有するものであって、
前記収納庫内熱交換手段が、前記(1)乃至(5)の何れかに記載の冷却装置における蒸発器であることを特徴とする。
(6) Moreover, the vending machine according to the present invention (Claim 6) includes a casing that is surrounded by a heat insulating material and has an opening on one surface, and a partition plate that divides the casing into a plurality of product storages. The product storage outlets corresponding to each of the product storages are provided, the heat insulating doors that open and close the opening, and the product storages, respectively, having a function of storing products and sequentially transporting them downward. A merchandise rack, a shooter that guides merchandise dropped from the merchandise rack to the merchandise exit, and a heat exchanger in the storage that is disposed below the shooter and cools or heats the air in the product storage, A blowing means for forming a flow of air passing through the heat exchange means in the storage; and a circulation duct for circulating the air cooled by the cooling means to the blowing means via the inside of the product rack. Have I,
The internal heat exchanger is the evaporator in the cooling device according to any one of (1) to (5).

(7)本発明に係る自動販売機(請求項7)は、前記商品収納庫の外部に収納庫外熱交換手段が設置され、該収納庫外熱交換手段が、前記(2)乃至(5)の何れかに記載の冷却装置における専用蒸発器であることを特徴とする。   (7) In the vending machine according to the present invention (Claim 7), the external storage heat exchanging means is installed outside the commodity storage, and the external storage heat exchanging means is the above (2) to (5). ) Is a dedicated evaporator in the cooling device according to any one of the above.

(i)本発明の請求項1に係る冷却装置は、二段圧縮機において、冷媒を一段目圧縮部の出側から二段目圧縮部の入側に直接供給自在にしているから、一段目圧縮部と二段目圧縮部との間で冷媒の温熱が放散されることがなく、ヒートポンプ運転における熱効率が向上する。   (I) In the cooling device according to claim 1 of the present invention, in the two-stage compressor, the refrigerant can be directly supplied from the outlet side of the first-stage compression section to the inlet side of the second-stage compression section. The heat of the refrigerant is not dissipated between the compression unit and the second-stage compression unit, and the thermal efficiency in the heat pump operation is improved.

(ii)本発明の請求項2に係る冷却装置は、一段目熱交換器バイパス配管を有するため、一段目熱交換器(中間熱交換器に相当する)において温熱が放散されることなく、冷媒が温熱冷媒送り配管を経由して兼用蒸発器に供給されるから、兼用蒸発器において温熱が効果的に利用される。このため、冷媒の圧縮比を下げることが可能になり、圧縮機効率の向上、消費電力の低減を図ることができる。   (Ii) Since the cooling device according to claim 2 of the present invention has the first-stage heat exchanger bypass pipe, the heat is not dissipated in the first-stage heat exchanger (corresponding to the intermediate heat exchanger), and the refrigerant Is supplied to the dual-use evaporator via the hot-heat refrigerant feed pipe, so that the heat is effectively used in the dual-use evaporator. For this reason, it becomes possible to lower the compression ratio of the refrigerant, and it is possible to improve the compressor efficiency and reduce the power consumption.

(iii)本発明に係る冷却装置(請求項3)は、二段目圧縮冷媒配管を通過する冷媒が保有する温熱と冷熱冷媒戻り配管を通過する冷媒の保有する冷熱との間で熱交換が実行されるため、膨張前の冷媒の温度が低下し、一方、圧縮前の冷媒の温度が上昇するから、前記効果が促進される。   (Iii) In the cooling device according to the present invention (Claim 3), heat exchange is performed between the hot heat held by the refrigerant passing through the second-stage compressed refrigerant pipe and the cold heat held by the refrigerant passing through the cold refrigerant return pipe. Since this is executed, the temperature of the refrigerant before expansion is lowered, and on the other hand, the temperature of the refrigerant before compression is raised, so that the effect is promoted.

(iv)本発明に係る冷却装置(請求項4)は、温熱冷媒戻り配管を通過する冷媒が第二熱交換器(ガスクーラに相当する)に供給する前に、これが保有する温熱と冷熱冷媒戻り配管を通過する冷媒の保有する冷熱との間で熱交換が実行されるため、膨張前の冷媒の温度が低下し、一方、圧縮前の冷媒の温度が上昇するから、前記効果がさらに促進される。   (Iv) The cooling device according to the present invention (Claim 4) is configured so that the refrigerant passing through the hot refrigerant return pipe is supplied to the second heat exchanger (corresponding to a gas cooler) and the hot heat and the cold refrigerant return that the refrigerant holds. Since heat exchange is performed with the cold heat held by the refrigerant passing through the pipe, the temperature of the refrigerant before expansion decreases, while the temperature of the refrigerant before compression increases, further promoting the effect. The

(v)本発明に係る冷却装置(請求項5)は、前記冷媒が二酸化炭素(CO2)であるため、ヒートポンプ運転による十分な加熱が可能になる。 (V) In the cooling device according to the present invention (Claim 5), since the refrigerant is carbon dioxide (CO 2 ), sufficient heating by a heat pump operation becomes possible.

(vi)また、本発明に係る自動販売機(請求項6)は、収納庫内熱交換手段が、前記冷却装置における蒸発器であるため、ヒートポンプ運転によって商品を適正温度に加熱することができると共に、消費電力の低減を図ることができる。   (Vi) In the vending machine according to the present invention (Claim 6), since the heat exchange means in the storage is an evaporator in the cooling device, the product can be heated to an appropriate temperature by heat pump operation. In addition, power consumption can be reduced.

(vii)本発明に係る自動販売機(請求項7)は、いずれの商品収納庫においても昇進を冷却をしない運転モード(加熱のみのモード)を実施することが可能になる。   (Vii) The vending machine according to the present invention (Claim 7) can implement the operation mode (heating only mode) in which the promotion is not cooled in any commodity storage.

以下、実施形態1〜3に冷却装置の実施形態を、実施形態4に自動販売機の実施形態を、それぞれ図を参照して説明する。なお、蒸発器が4台である場合を例に説明しているが、本発明はこれに限定するものではなく、2台以上の何れの台数であってもよい。また、各図において同一または共通する部材については同一の符号を付し、一部の説明を省略する。   Hereinafter, embodiments of the cooling device will be described in Embodiments 1 to 3, and an embodiment of a vending machine in Embodiment 4, respectively, with reference to the drawings. In addition, although the case where there are four evaporators has been described as an example, the present invention is not limited to this, and any number of two or more may be used. Moreover, the same code | symbol is attached | subjected about the same or common member in each figure, and a part of description is abbreviate | omitted.

[実施形態1]
(構成)
図1は本発明の実施形態1に係る冷却装置を説明する構成図である。図1において、冷却装置1000は、冷媒を所定圧力にまで圧縮する二段圧縮機1の一段目圧縮部1aと、一段目圧縮部1aにおいて圧縮された冷媒が供給され、これを冷却する一段目熱交換器(以下「中間熱交換器」と称す)2と、中間熱交換器2において冷却された冷媒が供給され、これを前記所定圧力より高い圧力にまで圧縮する二段圧縮機1の二段目圧縮部1bと、二段目圧縮部1bにおいて圧縮された冷媒が供給され、これを冷却する二段目熱交換器(以下「ガスクーラ」と称す)3と、ガスクーラ3において冷却された冷媒が供給され、これを膨張させる膨張機構4(以下「電子膨張弁4」と称す)と、を有している。
さらに、電子膨張弁4において膨張された冷媒または二段目圧縮部1bにおいて圧縮された冷媒が供給され、これを蒸発または凝縮させる複数の蒸発器7a、7b、7c、7dと、を有している。なお、蒸発器7a、7dは冷媒を蒸発する専用蒸発器であり、蒸発器7b、7cは冷媒を蒸発または凝縮する兼用蒸発器である。
[Embodiment 1]
(Constitution)
FIG. 1 is a configuration diagram illustrating a cooling device according to Embodiment 1 of the present invention. In FIG. 1, a cooling device 1000 is supplied with a first-stage compression unit 1a of a two-stage compressor 1 that compresses the refrigerant to a predetermined pressure, and a refrigerant compressed in the first-stage compression unit 1a, and cools the first-stage compression unit 1a. A heat exchanger (hereinafter referred to as an “intermediate heat exchanger”) 2 and a refrigerant cooled in the intermediate heat exchanger 2 are supplied and compressed in a two-stage compressor 1 that compresses the refrigerant to a pressure higher than the predetermined pressure. The stage compressor 1b, the second stage heat exchanger (hereinafter referred to as “gas cooler”) 3 for cooling the refrigerant compressed in the second stage compressor 1b, and the refrigerant cooled in the gas cooler 3 And an expansion mechanism 4 (hereinafter referred to as “electronic expansion valve 4”) for expanding the same.
Furthermore, the refrigerant expanded in the electronic expansion valve 4 or the refrigerant compressed in the second-stage compression unit 1b is supplied, and has a plurality of evaporators 7a, 7b, 7c, 7d for evaporating or condensing the refrigerant. Yes. The evaporators 7a and 7d are dedicated evaporators that evaporate the refrigerant, and the evaporators 7b and 7c are dual-purpose evaporators that evaporate or condense the refrigerant.

(冷熱冷媒回路)
二段圧縮機1の一段目圧縮部1aの出側と中間熱交換器2の入側とを開閉弁12vを介して連結する一段目圧縮冷媒配管12と、中間熱交換器2の出側と二段圧縮機1の二段目圧縮部1bの入側とを連結する一段目冷却冷媒配管21と、二段圧縮機1の二段目圧縮部1bの出側とガスクーラ3の入側とを開閉弁13vを介して連結する二段目圧縮冷媒配管13と、ガスクーラ3の出側と電子膨張弁4の入側とを連結する二段目圧縮冷媒配管34とが設けられている。
さらに、電子膨張弁4の出側と蒸発器7a、7b、7c、7dの入側とを、それぞれ開閉弁5a、5b、5c、5dを介して連結する冷熱冷媒送り配管47a、47b、47c、47d(共通部分を「冷熱冷媒送り配管47」と称す)と、蒸発器7a、7b、7c、7dの出側と二段圧縮機1の一段目圧縮部1aの入側とを連結する冷熱冷媒戻り配管71a、71b、71c、71d(共通部分を「冷熱冷媒戻り配管71」と称す)とが設けられている。
(Cryogenic refrigerant circuit)
A first-stage compressed refrigerant pipe 12 that connects the outlet side of the first-stage compression section 1a of the second-stage compressor 1 and the inlet side of the intermediate heat exchanger 2 via an on-off valve 12v; and the outlet side of the intermediate heat exchanger 2; The first-stage cooling refrigerant pipe 21 that connects the inlet side of the second-stage compressor 1b of the two-stage compressor 1, the outlet side of the second-stage compressor 1b of the second-stage compressor 1, and the inlet side of the gas cooler 3 A second-stage compressed refrigerant pipe 13 connected via the on-off valve 13v and a second-stage compressed refrigerant pipe 34 connecting the outlet side of the gas cooler 3 and the inlet side of the electronic expansion valve 4 are provided.
Furthermore, the refrigerant supply pipes 47a, 47b, 47c, which connect the outlet side of the electronic expansion valve 4 and the inlet side of the evaporators 7a, 7b, 7c, 7d via the on-off valves 5a, 5b, 5c, 5d, respectively. 47d (the common part is referred to as “cold refrigerant feed pipe 47”), the cold refrigerant that connects the outlet side of the evaporators 7a, 7b, 7c, 7d and the inlet side of the first stage compression unit 1a of the two-stage compressor 1 Return pipes 71a, 71b, 71c, 71d (common portions are referred to as “cold refrigerant return pipe 71”) are provided.

(温熱冷媒回路)
兼用蒸発器である蒸発器7b、7cについては、入側である冷熱冷媒送り配管47b、47cに逆止弁6b、6cが、出側である冷熱冷媒戻り配管71b、71cに逆止弁8b、8cが、それぞれ設置されている。
そして、二段圧縮機1の二段目圧縮部1bの出側と蒸発器7b、7cの入側(逆止弁6b、6cの下流側)とが、開閉弁9b、9cを介して温熱冷媒送り配管17b、17c(共通部分を「温熱冷媒送り配管17」と称す)によって連結されている。また、蒸発器7b、7cの出側(逆止弁8b、8cの上流側)と二段目熱交換器3の入側とが、逆止弁10b、10cを介して温熱冷媒戻り配管73b、73c(共通部分を「温熱冷媒戻り配管73」と称す)によって連結されている。
(Thermal refrigerant circuit)
Regarding the evaporators 7b and 7c, which are dual-use evaporators, check valves 6b and 6c are provided on the inlet side cooling refrigerant feed pipes 47b and 47c, and check valve 8b is provided on the outlet side cooling refrigerant return pipes 71b and 71c. 8c is installed respectively.
The outlet side of the second stage compressor 1b of the second stage compressor 1 and the inlet side of the evaporators 7b and 7c (downstream side of the check valves 6b and 6c) are connected to the hot refrigerant via the on-off valves 9b and 9c. The feed pipes 17b and 17c are connected by a common part (referred to as “thermal refrigerant feed pipe 17”). Further, the outlet side of the evaporators 7b, 7c (upstream side of the check valves 8b, 8c) and the inlet side of the second stage heat exchanger 3 are connected to the hot refrigerant return pipe 73b via the check valves 10b, 10c, 73c (the common part is referred to as “thermal refrigerant return pipe 73”).

(一段目熱交換器バイパス配管)
さらに、二段圧縮機1の一段目圧縮部1aの出側と二段目圧縮部1bの入側とを開閉弁11vを介して連結する一段目熱交換器バイパス配管11が設けられている。すなわち、開閉弁12vを閉じて開閉弁11vを開くことにより、一段目圧縮部1aから吐出された冷媒は中間熱交換器2を通過することなく二段目圧縮部1bに直接供給され、一方、開閉弁12vを開いて開閉弁11vを閉じることにより、一段目圧縮部1aから吐出された冷媒は中間熱交換器2を通過した後、二段目圧縮部1bに供給される。
(First stage heat exchanger bypass piping)
Furthermore, a first-stage heat exchanger bypass pipe 11 that connects the outlet side of the first-stage compression unit 1a of the second-stage compressor 1 and the entry side of the second-stage compression unit 1b via an on-off valve 11v is provided. That is, by closing the on-off valve 12v and opening the on-off valve 11v, the refrigerant discharged from the first-stage compression unit 1a is directly supplied to the second-stage compression unit 1b without passing through the intermediate heat exchanger 2, By opening the on-off valve 12v and closing the on-off valve 11v, the refrigerant discharged from the first-stage compression unit 1a passes through the intermediate heat exchanger 2 and is then supplied to the second-stage compression unit 1b.

(内部熱交換器)
また、二段目圧縮冷媒配管34を通過する冷媒と冷熱冷媒戻り配管71を通過する冷媒との間で熱交換する、第一熱回収手段(以下「内部熱交換器」と称す)100が設けられている。すなわち、内部熱交換器100において、二段目圧縮冷媒配管34と冷熱冷媒戻り配管71とは直接当接にまたは伝熱媒体を介して間接に熱的に接合されている。したがって、二段目圧縮冷媒配管34を通過する冷媒が保有している温熱によって二段圧縮機1の一段目圧縮部1aに戻る冷媒は温められ、一方、冷熱冷媒戻り配管71を通過する冷媒が保有している冷熱によって電子膨張弁4に供給される冷媒は冷やされる。
(Internal heat exchanger)
In addition, a first heat recovery means (hereinafter referred to as “internal heat exchanger”) 100 that exchanges heat between the refrigerant passing through the second-stage compressed refrigerant pipe 34 and the refrigerant passing through the cold refrigerant return pipe 71 is provided. It has been. That is, in the internal heat exchanger 100, the second-stage compressed refrigerant pipe 34 and the cold refrigerant return pipe 71 are thermally joined in direct contact or indirectly through a heat transfer medium. Therefore, the refrigerant returning to the first stage compression unit 1a of the second stage compressor 1 is warmed by the warm heat held by the refrigerant passing through the second stage compression refrigerant pipe 34, while the refrigerant passing through the cold refrigerant return pipe 71 is heated. The refrigerant supplied to the electronic expansion valve 4 is cooled by the cold heat that it holds.

(CHHモード)
図2は図1に示す冷却装置におけるCHHモードの運転状況を説明するものであって、(a)は構成図、(b)はモリエル線図である。なお、冷媒の流れる配管を実線で示し、冷媒が流れる方向を矢印を付記する。また、冷媒の流れない配管を点線で示す。
図2の(a)において、冷却装置1000は、専用蒸発器である蒸発器7aは図示しない冷却室に配置され、冷熱が供給される。兼用蒸発器である蒸発器7b、7dは図示しない加熱冷却兼用室に配置され、温熱が供給される。また、専用蒸発器である蒸発器7cは大気中に配置され、当該モードでは冷媒が供給されない。
(CHH mode)
FIGS. 2A and 2B are diagrams for explaining the operation status of the CHH mode in the cooling apparatus shown in FIG. 1, wherein FIG. 2A is a configuration diagram and FIG. 2B is a Mollier diagram. The piping through which the refrigerant flows is indicated by a solid line, and the direction in which the refrigerant flows is indicated by an arrow. In addition, a pipe through which no refrigerant flows is indicated by a dotted line.
In FIG. 2A, in the cooling device 1000, an evaporator 7a, which is a dedicated evaporator, is disposed in a cooling chamber (not shown) and supplied with cold heat. The evaporators 7b and 7d, which are dual-purpose evaporators, are arranged in a heating / cooling dual-purpose chamber (not shown) and supplied with warm heat. Further, the evaporator 7c, which is a dedicated evaporator, is disposed in the atmosphere, and no refrigerant is supplied in this mode.

(温熱冷媒の流れ)
冷媒の圧力は、まず、二段圧縮機1の一段目圧縮部1aのシリンダによって中間よりやや低いところまで上昇する。一段目圧縮部1aから吐出した冷媒は、二段目圧縮部1bに直接供給される。すなわち、一段目熱交換器バイパス配管11の開閉弁11vが開き、一段目圧縮冷媒配管12の開閉弁12vが閉じているから、冷媒は中間熱交換器2に流れ込まない。
そして、二段目圧縮部1bのシリンダー内で圧縮された冷媒は、高温・高圧となる。二段目圧縮部1bから吐出した冷媒は、温熱冷媒送り配管17に流れ込み、開いている開閉弁9b、9cを通過して蒸発器7b、7cに供給される。このとき、二段目圧縮冷媒配管13の開閉弁13vは閉じているから、冷媒がガスクーラ3に供給されることはない。よって、蒸発器7b、7cにおいて、冷媒の保有する温熱は空気に受け渡され、図示しない加熱冷却兼用室の空気を加熱する。
(Flow of thermal refrigerant)
First, the pressure of the refrigerant rises to a position slightly lower than the middle by the cylinder of the first stage compression unit 1a of the second stage compressor 1. The refrigerant discharged from the first stage compression unit 1a is directly supplied to the second stage compression unit 1b. That is, the on-off valve 11v of the first-stage heat exchanger bypass pipe 11 is open and the on-off valve 12v of the first-stage compressed refrigerant pipe 12 is closed, so that the refrigerant does not flow into the intermediate heat exchanger 2.
And the refrigerant | coolant compressed in the cylinder of the 2nd stage compression part 1b becomes high temperature and a high pressure. The refrigerant discharged from the second-stage compression unit 1b flows into the hot refrigerant feed pipe 17, passes through the open on-off valves 9b and 9c, and is supplied to the evaporators 7b and 7c. At this time, since the on-off valve 13v of the second-stage compressed refrigerant pipe 13 is closed, the refrigerant is not supplied to the gas cooler 3. Therefore, in the evaporators 7b and 7c, the warm heat possessed by the refrigerant is transferred to the air and heats the air in the heating / cooling combined chamber (not shown).

空気に温熱を受け渡した冷媒は、逆止弁10b、10cを通過して温熱冷媒戻り配管73b、73cに流れ込み、ガスクーラ3に供給される。このとき、開閉弁8b、8cは閉じているから、冷媒が冷熱冷媒戻り配管71b、71cに流れ込んで、そのまま、二段圧縮機1の一段目圧縮部1aに戻ることはない。
そして、冷媒はガスクーラ3において冷却された後、二段目圧縮冷媒配管34に流れ込み内部熱交換器100を経由して電子膨張弁4に供給される。
The refrigerant that has passed the heat to the air passes through the check valves 10b and 10c, flows into the hot refrigerant return pipes 73b and 73c, and is supplied to the gas cooler 3. At this time, since the on-off valves 8b and 8c are closed, the refrigerant does not flow into the refrigeration refrigerant return pipes 71b and 71c and return to the first stage compression unit 1a as it is.
Then, after the refrigerant is cooled in the gas cooler 3, the refrigerant flows into the second-stage compressed refrigerant pipe 34 and is supplied to the electronic expansion valve 4 via the internal heat exchanger 100.

(冷熱冷媒の流れ)
電子膨張弁4において断熱膨張した冷媒は、低温・低圧となって、開いている開閉弁5aを通過して冷熱冷媒送り配管47aに流れ込み、蒸発器7aに供給される。
そして、蒸発器7aにおいて、冷媒の保有する冷熱は空気に受け渡され、図示しない冷却室の空気を冷却する。
さらに、空気に冷熱を受け渡した冷媒は、冷熱冷媒戻り配管71aに流れ込み、内部熱交換器100を経由して二段圧縮機1の一段目圧縮部1aに戻る。
なお、内部熱交換器100では、二段目圧縮冷媒配管34を流れる冷媒(温熱を保有している)と冷熱冷媒戻り配管71aを流れる冷媒(冷熱を保有している)との間で、熱交換が実行される。すなわち、前者は冷やされて電子膨張弁4に供給され、後者は温められて二段圧縮機1の一段目圧縮部1aに戻っている。
(Cooling refrigerant flow)
The refrigerant adiabatically expanded in the electronic expansion valve 4 becomes low temperature and low pressure, passes through the open on-off valve 5a, flows into the cold heat refrigerant feed pipe 47a, and is supplied to the evaporator 7a.
And in the evaporator 7a, the cold heat which a refrigerant | coolant holds is delivered to air, and the air of the cooling chamber which is not shown in figure is cooled.
Further, the refrigerant that has delivered the cold heat to the air flows into the cold refrigerant return pipe 71a and returns to the first stage compression unit 1a of the two-stage compressor 1 via the internal heat exchanger 100.
In the internal heat exchanger 100, heat is generated between the refrigerant flowing through the second-stage compressed refrigerant pipe 34 (having hot heat) and the refrigerant flowing through the cold refrigerant return pipe 71a (having cold). Exchange is performed. That is, the former is cooled and supplied to the electronic expansion valve 4, and the latter is warmed and returned to the first stage compression unit 1 a of the two-stage compressor 1.

(モリエル線図)
図2の(b)において、縦軸は圧力、横軸は比エンタルピで、右側の曲線は等温線である。すなわち、本発明のCHHモードにおいて、冷媒は中間熱交換器2に流れ込まないから、二段圧縮機1の一段目圧縮部1aにおいて、図中、状態Aから状態Bにまで圧縮された冷媒は、温度低下のないまま、状態C(圧力P1)にまで二段目圧縮部1bにおいて圧縮される。その後、冷媒は蒸発器7b、7c、ガスクーラ3および内部熱交換器100において温熱を放出し、状態Dに到達する。
さらに、電子膨張弁4において、等エントロピ的に断熱膨張され、状態Dから状態Eに冷却かつ減圧される。そして、蒸発器7aにおいて冷熱を放出して空気を冷却すると共に、冷媒自体の温度は状態Aにまで高くなる。
(Moliel diagram)
In FIG. 2B, the vertical axis is pressure, the horizontal axis is specific enthalpy, and the right curve is an isotherm. That is, in the CHH mode of the present invention, since the refrigerant does not flow into the intermediate heat exchanger 2, the refrigerant compressed from the state A to the state B in the first stage compression unit 1a in the two-stage compressor 1 is The second stage compression section 1b compresses the state C (pressure P1) without lowering the temperature. Thereafter, the refrigerant releases warm heat in the evaporators 7b and 7c, the gas cooler 3, and the internal heat exchanger 100, and reaches the state D.
Further, the electronic expansion valve 4 is isentropically expanded in an isentropic manner, and is cooled and decompressed from the state D to the state E. Then, in the evaporator 7a, cold heat is released to cool the air, and the temperature of the refrigerant itself increases to the state A.

一方、従来のCHHモードでは、一段目熱交換器バイパス配管11が設置されていないため、二段圧縮機1の一段目圧縮部1aにおいて圧縮された冷媒は中間熱交換器2に流れ込むから、中間熱交換器2において状態Bから状態Fにまで冷却される。そして、二段目圧縮部1bにおいて状態G(圧力P2)にまで圧縮される。なお、状態Cと状態Gとは同じ温度である。そして、本発明のCHHモードと同様に、状態Hまで冷却され、さらに状態Eにまで、断熱膨張される。
したがって、二段目圧縮部1bにおける圧力は、本発明のCHHモードではP1であるのに対し、従来のCHHモードではP2であるから、前者は中間熱交換器2における放熱がない分、後者より(P2−P1)だけ圧力が低くなっている。
すなわち、本発明によれば、二段圧縮機1から吐出される冷媒の圧力を上昇することなく、高い吐出温度が得られることになり、また、所定の吐出温度を保証するためには、二段圧縮機1の吐出圧力を低くすることが可能になる。よって、蒸発器7b、7cに流入する冷媒の温度の高温化が図られ、消費電力の低減が促進される。
On the other hand, in the conventional CHH mode, since the first stage heat exchanger bypass pipe 11 is not installed, the refrigerant compressed in the first stage compression section 1a of the second stage compressor 1 flows into the intermediate heat exchanger 2, so The heat exchanger 2 is cooled from the state B to the state F. And it compresses to the state G (pressure P2) in the 2nd stage | paragraph compression part 1b. In addition, the state C and the state G are the same temperature. Then, similarly to the CHH mode of the present invention, the state is cooled to the state H and further expanded to the state E.
Therefore, the pressure in the second-stage compression unit 1b is P1 in the CHH mode of the present invention, and P2 in the conventional CHH mode. Therefore, the former is less than the latter because there is no heat dissipation in the intermediate heat exchanger 2. The pressure is reduced by (P2-P1).
That is, according to the present invention, a high discharge temperature can be obtained without increasing the pressure of the refrigerant discharged from the two-stage compressor 1, and in order to guarantee a predetermined discharge temperature, two The discharge pressure of the stage compressor 1 can be lowered. Therefore, the temperature of the refrigerant flowing into the evaporators 7b and 7c is increased, and the reduction of power consumption is promoted.

(HHモード)
図3は図1に示す冷却装置におけるHHモードの運転状況を示す説明図である。図3において、専用蒸発器である蒸発器7aは冷却室に配置されているものの、冷媒が供給されていない。また、専用蒸発器である蒸発器7dは冷却室の外に配置され、冷熱冷媒が供給される。すなわち、開閉弁5aが閉じられて冷熱冷媒送り配管47aへの冷媒流入が阻止され、一方、開閉弁5dが開けられて冷熱冷媒送り配管47dに冷媒が流入している点が、前記CHH運転モードと相違している。
このとき、兼用蒸発器である蒸発器7b、7cには、前記CHH運転モードと同様の要領で温熱冷媒が供給されているから、前述と同様に、二段目圧縮部1bにおける圧力は、中間熱交換器2における放熱分がないことにより低くなっている。
(HH mode)
FIG. 3 is an explanatory view showing an operation state of the HH mode in the cooling device shown in FIG. In FIG. 3, the evaporator 7a, which is a dedicated evaporator, is disposed in the cooling chamber, but is not supplied with refrigerant. The evaporator 7d, which is a dedicated evaporator, is disposed outside the cooling chamber and supplied with cold refrigerant. That is, the on-off valve 5a is closed to prevent refrigerant from flowing into the chilled refrigerant feed pipe 47a, while the on-off valve 5d is opened and refrigerant flows into the chilled refrigerant feed pipe 47d. Is different.
At this time, since the hot refrigerant is supplied to the evaporators 7b and 7c, which are dual-purpose evaporators, in the same manner as in the CHH operation mode, the pressure in the second-stage compression unit 1b is intermediate as described above. It is low because there is no heat radiation in the heat exchanger 2.

(CCCモード)
図4は図1に示す冷却装置におけるCCCモードの運転状況を示す説明図である。図4において、専用蒸発器である蒸発器7aおよび兼用蒸発器である蒸発器7b、7cには、いずれも冷熱冷媒が供給されている。
(CCC mode)
FIG. 4 is an explanatory diagram showing an operation state of the CCC mode in the cooling device shown in FIG. In FIG. 4, cold refrigerant is supplied to both the evaporator 7a, which is a dedicated evaporator, and the evaporators 7b, 7c, which are dual-purpose evaporators.

(冷熱冷媒の流れ)
冷媒の圧力は、まず、二段圧縮機1の一段目圧縮部1aのシリンダによって中間よりやや低いところまで上昇する。一段目圧縮部1aから吐出した冷媒は、中間熱交換器2に供給されて冷却された後、二段目圧縮部1bに供給される。すなわち、一段目熱交換器バイパス配管11の開閉弁11vが閉じ、一段目圧縮冷媒配管12の開閉弁12vが開いているから、バイパス回路は閉塞状態にある。
そして、二段目圧縮部1bのシリンダー内で圧縮された冷媒は、高温・高圧となりガスクーラ3に供給される。すなわち、開閉弁13vは開き、一方、開閉弁9b、9cは閉じているから、温熱冷媒送り配管17は閉塞状態にある。
(Cooling refrigerant flow)
First, the pressure of the refrigerant rises to a position slightly lower than the middle by the cylinder of the first stage compression unit 1a of the second stage compressor 1. The refrigerant discharged from the first stage compression unit 1a is supplied to the intermediate heat exchanger 2 and cooled, and then supplied to the second stage compression unit 1b. That is, since the on-off valve 11v of the first-stage heat exchanger bypass pipe 11 is closed and the on-off valve 12v of the first-stage compressed refrigerant pipe 12 is open, the bypass circuit is in a closed state.
Then, the refrigerant compressed in the cylinder of the second stage compression unit 1 b becomes high temperature and high pressure and is supplied to the gas cooler 3. That is, the on-off valve 13v is open, while the on-off valves 9b and 9c are closed, so that the hot refrigerant feed pipe 17 is closed.

さらに、ガスクーラ3において冷却された冷媒は電子膨張弁4に供給され、断熱膨張した後、蒸発器7a、7b、7cに供給される。このとき、開閉弁5dは閉じているから、冷媒が冷熱冷媒送り配管47dに流れ込むことがない。
そして、蒸発器7a、7b、7cにおいて冷熱を放出した冷媒は、冷熱冷媒戻り配管71に流れ込み、二段圧縮機1の一段目圧縮部1aに戻っている。このとき、開閉弁8b、8cは開き、逆止弁10b、10cは閉じている。
よって、冷却装置1000では、開閉弁を操作するだけで、全蒸発器7a、7b、7cに冷熱冷媒を供給することが可能である。
Further, the refrigerant cooled in the gas cooler 3 is supplied to the electronic expansion valve 4, and after adiabatic expansion, is supplied to the evaporators 7a, 7b, and 7c. At this time, since the on-off valve 5d is closed, the refrigerant does not flow into the cold / hot refrigerant feed pipe 47d.
Then, the refrigerant that has released the cold heat in the evaporators 7 a, 7 b, and 7 c flows into the cold heat refrigerant return pipe 71 and returns to the first stage compression unit 1 a of the two-stage compressor 1. At this time, the on-off valves 8b and 8c are opened, and the check valves 10b and 10c are closed.
Therefore, in the cooling device 1000, it is possible to supply the cold refrigerant to all the evaporators 7a, 7b, 7c only by operating the on-off valve.

[実施形態2]
(構成)
図5は本発明の実施形態2に係る冷却装置を説明するものであって、(a)は構成図、(b)はCHHモードの運転状況を示す説明図である。
図5の(a)において、冷却装置2000は、実施形態1に説明した冷却装置1000に、温熱冷媒戻り配管73を通過する冷媒と冷熱冷媒戻り配管71を通過する冷媒との間で熱交換する、第二熱回収手段200を設けたものである。すなわち、第二熱回収手段200において、温熱冷媒戻り配管73と冷熱冷媒戻り配管71とは直接当接にまたは伝熱媒体を介して間接に熱的に接合されている。
[Embodiment 2]
(Constitution)
5A and 5B illustrate a cooling device according to Embodiment 2 of the present invention, in which FIG. 5A is a configuration diagram, and FIG. 5B is an explanatory diagram showing an operation state in a CHH mode.
In FIG. 5A, the cooling device 2000 exchanges heat with the cooling device 1000 described in the first embodiment between the refrigerant passing through the hot refrigerant return pipe 73 and the refrigerant passing through the cold refrigerant return pipe 71. The second heat recovery means 200 is provided. That is, in the second heat recovery means 200, the hot refrigerant return pipe 73 and the cold refrigerant return pipe 71 are thermally joined in direct contact or indirectly through a heat transfer medium.

(CHHモード)
図5の(b)において、蒸発器7b、7cから流出した冷媒が保有する温熱は、蒸発器7aから流出した冷媒(冷熱を保有している)に受け渡された後、ガスクーラ3において大気に放散される。このとき、受け渡された温熱分だけ、内部熱交換器100に供給される冷媒の温度は低下し、一方、二段圧縮機1の一段目圧縮部1aに戻る冷媒の温度は上昇するから、二段圧縮機1の効率が向上している。
なお、蒸発器7b、7cから流出した冷媒(温熱を保有している)は、ガスクーラ3において放熱する前であるから比較的高い温度状態にあり、一方、蒸発器7aから流出した冷媒(冷熱を保有している)は、内部熱交換器100を通過した後であるから比較的低い温度状態にある。したがって、第二熱回収手段200では、内部熱交換器100よりも大きな温度差がある状態で熱交換が実行されるため、熱交換効率が向上している。
(CHH mode)
In (b) of FIG. 5, the hot heat held by the refrigerant flowing out of the evaporators 7 b and 7 c is transferred to the refrigerant flowing out of the evaporator 7 a (having cold heat), and then returned to the atmosphere in the gas cooler 3. Dissipated. At this time, the temperature of the refrigerant supplied to the internal heat exchanger 100 is decreased by the amount of warm heat transferred, while the temperature of the refrigerant returning to the first stage compression unit 1a of the two-stage compressor 1 is increased. The efficiency of the two-stage compressor 1 is improved.
Note that the refrigerant that flows out of the evaporators 7b and 7c (having hot heat) is in a relatively high temperature state before it dissipates heat in the gas cooler 3, while the refrigerant that flows out of the evaporator 7a (cold heat is removed). Is in a relatively low temperature state after passing through the internal heat exchanger 100. Therefore, in the second heat recovery means 200, heat exchange is performed in a state where there is a larger temperature difference than in the internal heat exchanger 100, so that the heat exchange efficiency is improved.

[実施形態3]
(構成)
図6は本発明の実施形態3に係る冷却装置を説明するものであって、(a)は構成図、(b)はCHHモードの運転状況を示す説明図である。
図6の(a)において、冷却装置3000は、実施形態1に説明した冷却装置1000に、温熱冷媒戻り配管73のガスクーラ3の直前に開閉弁73vを設け、温熱冷媒戻り配管73の開閉弁73vよりも蒸発器7b、7c寄りの位置と、二段目圧縮冷媒配管34の内部熱交換器100よりもガスクーラ3寄りの位置とを連結する二段目熱交換器バイパス配管300を設置している。なお、二段目熱交換器バイパス配管300には開閉弁300vが設置されている。
[Embodiment 3]
(Constitution)
6A and 6B illustrate a cooling device according to Embodiment 3 of the present invention, in which FIG. 6A is a configuration diagram, and FIG. 6B is an explanatory diagram illustrating an operation state in a CHH mode.
In FIG. 6A, the cooling device 3000 is provided with an opening / closing valve 73v immediately before the gas cooler 3 of the hot refrigerant return pipe 73 in the cooling device 1000 described in the first embodiment, and an open / close valve 73v of the hot refrigerant return pipe 73. 2nd stage heat exchanger bypass piping 300 which connects the position closer to the evaporators 7b and 7c and the position closer to the gas cooler 3 than the internal heat exchanger 100 of the second stage compressed refrigerant piping 34 is installed. . The second stage heat exchanger bypass pipe 300 is provided with an on-off valve 300v.

(CHHモード)
図6の(b)において、開閉弁73vを閉じて開閉弁300vを開くことによって、蒸発器7b、7cから流出した冷媒は、内部熱交換器100に直接供給されるから、該冷媒が保有している温熱がガスクーラ3において大気に放散されることがない。そして、蒸発器7b、7cから流出した冷媒(温熱を保有している)は、ガスクーラ3において放熱する前であるから比較的高い温度状態にあって、蒸発器7aから流出した冷媒(冷熱を保有している)との間で、比較的良好な熱交換効率で熱交換が実行される。
(CHH mode)
In FIG. 6B, the refrigerant flowing out of the evaporators 7b and 7c is directly supplied to the internal heat exchanger 100 by closing the on-off valve 73v and opening the on-off valve 300v. The heated heat is not dissipated to the atmosphere in the gas cooler 3. The refrigerant (having hot heat) flowing out of the evaporators 7b and 7c is in a relatively high temperature state before it dissipates heat in the gas cooler 3, and the refrigerant flowing out of the evaporator 7a (having cold heat). Heat exchange with a relatively good heat exchange efficiency.

したがって、電子膨張弁4に供給される冷媒は冷やされ、二段圧縮機1の一段目圧縮部1aに供給される冷媒は温められるから、電子膨張弁4および二段圧縮機1の効率が向上している。特に、外気温度が高い場合であっても、ガスクーラ3における放熱量が増加しないため、二段圧縮機1の負担を増すことなく高い吐出温度が得られる。
なお、以上は、開閉弁73vを閉じているが、開閉弁73vと開閉弁300vとを何れも開いて、蒸発器7b、7cから流出した冷媒の一部をガスクーラ3に供給し、その残りを内部熱交換器100に直接供給するようにしても、前記に準じた効果が得られるものである。
Therefore, since the refrigerant supplied to the electronic expansion valve 4 is cooled and the refrigerant supplied to the first stage compression unit 1a of the two-stage compressor 1 is warmed, the efficiency of the electronic expansion valve 4 and the two-stage compressor 1 is improved. is doing. In particular, even if the outside air temperature is high, the amount of heat released from the gas cooler 3 does not increase, so that a high discharge temperature can be obtained without increasing the burden on the two-stage compressor 1.
In the above, the on-off valve 73v is closed, but both the on-off valve 73v and the on-off valve 300v are opened to supply a part of the refrigerant flowing out of the evaporators 7b, 7c to the gas cooler 3, and the rest Even if it supplies directly to the internal heat exchanger 100, the effect according to the above is acquired.

[実施形態4]
(自動販売機)
図7および図8は本発明の実施形態4に係る自動販売機を説明するものであって、図7は側面視の断面図、図8は正面視の断面図である。
図7および図8において、自動販売機(以下「自販機」と称す)4000は、自販機4000の本体のキャビネット400と、キャビネット400の内部で図示しない断熱材に包囲され、商品407を収納するための商品収納庫401と、商品補充時に商品収納庫401を開閉する商品補充用扉404と、商品収納庫401と外気を遮断するための内扉405と、自販機4000の前扉406と、を有している。
[Embodiment 4]
(vending machine)
7 and 8 illustrate a vending machine according to Embodiment 4 of the present invention. FIG. 7 is a sectional view in side view, and FIG. 8 is a sectional view in front view.
7 and 8, a vending machine (hereinafter referred to as “vending machine”) 4000 is surrounded by a cabinet 400 of the main body of the vending machine 4000 and a heat insulating material (not shown) inside the cabinet 400, and stores a product 407. A product storage unit 401; a product replenishment door 404 for opening and closing the product storage unit 401 when the product is replenished; an inner door 405 for shutting off the product storage unit 401 and the outside air; and a front door 406 of the vending machine 4000. ing.

商品収納庫401は仕切り板403AB、403BCによって商品室402A、402B、402Cに仕切られている。なお、以下の説明において、商品室402A、402B、402Cにおいて共通する内容については添え字「A、B、C」の記載を省略する。
各商品室402には、商品407を収納するための商品収納ラック408と、商品収納ラック408から自然落下した商品407を取出すための商品取出し口409と、商品407を商品取出し口409まで誘導する商品誘導板410と、庫内に設置される部品を収納する庫内部品収納室411と、冷却ユニットの蒸発器7と、蒸発器7の熱を商品407に伝達するための庫内フアン414と、庫内フアン414のフアンカバー415と、庫内温度を計測する庫内温度センサー416と、上方の庫内空気を吸い込んで蒸発器7に戻すための背面ダクト417と、が設置されている。
The product storage 401 is partitioned into product rooms 402A, 402B, and 402C by partition plates 403AB and 403BC. In the following description, the subscript “A, B, C” is omitted for the contents common to the product rooms 402A, 402B, 402C.
In each product room 402, a product storage rack 408 for storing the product 407, a product take-out port 409 for taking out the product 407 that has naturally dropped from the product storage rack 408, and the product 407 are guided to the product take-out port 409. A product guide plate 410, a component storage chamber 411 for storing components installed in the store, an evaporator 7 of the cooling unit, and an internal fan 414 for transferring heat of the evaporator 7 to the product 407 A fan cover 415 of the internal fan 414, an internal temperature sensor 416 for measuring the internal temperature, and a back duct 417 for sucking the upper internal air and returning it to the evaporator 7 are installed.

また、商品収納庫401の下方には、冷却ユニットのコンデンシングユニット418を収納するための機械室419と、電装品を収納するための電装品収納室420とが配置されている。
そして、冷却ユニットのコンデンシングユニット418は、実施形態1の冷却装置1000によって形成されている。すなわち、二段圧縮機1と、一段圧縮した後の冷媒を冷却するための中間熱交換器2と、冷媒の熱エネルギを放熱するためのガスクーラ3と、中間熱交換器2およびガスクーラ3の熱交換を促進するための庫外フアン500と、高圧高温冷媒と低圧低温冷媒の熱交換を行う内部熱交換器100と、冷媒を膨張させ、低圧低温の冷媒にする膨張機構4と、商品室402A、402B、402C内に設置された蒸発器7a、7b、7c(図7において「7」とまとめて示している)と、商品収納庫401の外に設置した庫外排熱用熱交換器7d(図示しない)と、を有している。
また、蒸発器7a、7b、7cへの冷媒の供給を制御する開閉弁5a、5b、5cと、庫外排熱用熱交換器7dへの冷媒の流れを制御する庫外排熱用開閉弁5dとが設置されている。なお、かかる部材を連結する配管および開閉弁は、図1に示す冷却装置1000に同じであるから説明を省略する。
A machine room 419 for housing the cooling unit condensing unit 418 and an electrical component storage chamber 420 for storing electrical components are disposed below the product storage unit 401.
The cooling unit condensing unit 418 is formed by the cooling device 1000 of the first embodiment. That is, the two-stage compressor 1, the intermediate heat exchanger 2 for cooling the refrigerant after the first stage compression, the gas cooler 3 for radiating the heat energy of the refrigerant, the heat of the intermediate heat exchanger 2 and the gas cooler 3 An external fan 500 for promoting the exchange, an internal heat exchanger 100 that performs heat exchange between the high-pressure and high-temperature refrigerant and the low-pressure and low-temperature refrigerant, the expansion mechanism 4 that expands the refrigerant into a low-pressure and low-temperature refrigerant, and the commodity chamber 402A , 402B, 402C, evaporators 7a, 7b, 7c (collectively indicated as “7” in FIG. 7), and external heat exhaust heat exchanger 7d installed outside the product storage 401 (Not shown).
Also, on-off valves 5a, 5b, 5c for controlling the supply of refrigerant to the evaporators 7a, 7b, 7c, and an external exhaust heat on-off valve for controlling the flow of refrigerant to the external exhaust heat heat exchanger 7d 5d is installed. In addition, since the piping and on-off valve which connect this member are the same as the cooling device 1000 shown in FIG. 1, description is abbreviate | omitted.

すなわち、自販機4000は冷却装置1000を装備するから、商品室402Aを冷却専用室または冷媒の供給無し室として、商品室402B、402Cを加熱冷却兼用室とすることが可能であり、しかも、ヒートポンプ運転において、二段圧縮機1から吐出される冷媒の圧力を上昇することなく、高い吐出温度を得ることができ、蒸発器7b、7cに流入する冷媒の温度の高温化が図られる。よって、商品407を所定温度に維持することが容易であると共に、消費電力を低減することが可能になる。   That is, since the vending machine 4000 is equipped with the cooling device 1000, the product room 402A can be used as a cooling-only room or a refrigerant-free room, and the product rooms 402B and 402C can be used as heating and cooling combined rooms. Therefore, a high discharge temperature can be obtained without increasing the pressure of the refrigerant discharged from the two-stage compressor 1, and the temperature of the refrigerant flowing into the evaporators 7b and 7c can be increased. Therefore, it is easy to maintain the product 407 at a predetermined temperature, and power consumption can be reduced.

本発明によれば、ヒートポンプ運転において、二段圧縮機から吐出される冷媒の圧力を上昇することなく高い吐出温度を得ることができるため、消費電力の低減により運転コストの低減が図られるから、各種冷却装置およびこれが設置された各種設備に広く利用することができる。   According to the present invention, in the heat pump operation, since a high discharge temperature can be obtained without increasing the pressure of the refrigerant discharged from the two-stage compressor, the operation cost can be reduced by reducing the power consumption. It can be widely used in various cooling devices and various facilities in which they are installed.

本発明の実施形態1に係る冷却装置を説明する構成図。The block diagram explaining the cooling device which concerns on Embodiment 1 of this invention. 図1に示す冷却装置におけるCHHモードの運転状況を示す説明図。Explanatory drawing which shows the operating condition of CHH mode in the cooling device shown in FIG. 図1に示す冷却装置におけるHHモードの運転状況を示す説明図。Explanatory drawing which shows the driving | running state of the HH mode in the cooling device shown in FIG. 図1に示す冷却装置におけるCCCモードの運転状況を示す説明図。Explanatory drawing which shows the driving | running state of the CCC mode in the cooling device shown in FIG. 本発明の実施形態2に係る冷却装置を説明する構成図と運転状況の説明図。The block diagram explaining the cooling device which concerns on Embodiment 2 of this invention, and explanatory drawing of an operating condition. 本発明の実施形態3に係る冷却装置を説明する構成図と運転状況の説明図。The block diagram explaining the cooling device which concerns on Embodiment 3 of this invention, and explanatory drawing of an operating condition. 本発明の実施形態4に係る自動販売機を説明する側面視の断面図。Sectional drawing of the side view explaining the vending machine concerning Embodiment 4 of this invention. 本発明の実施形態4に係る自動販売機を説明する正面視の断面図。Sectional drawing of the front view explaining the vending machine concerning Embodiment 4 of this invention.

符号の説明Explanation of symbols

1 二段圧縮機
1a 一段目圧縮部
1b 二段目圧縮部
2 一段目熱交換器(中間熱交換器)
3 二段目熱交換器(ガスクーラ)
4 膨張機構(電子膨張弁)
5 開閉弁
6 逆止弁
7 蒸発器
8 逆止弁
9 開閉弁
10 逆止弁
11 一段目熱交換器バイパス配管
12 一段目圧縮冷媒配管
13 二段目圧縮冷媒配管
17 温熱冷媒送り配管
21 一段目冷却冷媒配管
34 二段目圧縮冷媒配管
47 冷熱冷媒送り配管
71 冷熱冷媒戻り配管
73 温熱冷媒戻り配管
100 第一熱回収手段(内部熱交換器)
200 第二熱回収手段
300 二段目熱交換器バイパス配管
400 キャビネット
401 商品収納庫
402 商品室
404 商品補充用扉
405 内扉
406 前扉
407 商品
408 商品収納ラック
409 商品取出し口
410 商品誘導板
411 庫内部品収納室
414 庫内フアン
415 フアンカバー
416 庫内温度センサー
417 背面ダクト
418 コンデンシングユニット
419 機械室
420 電装品収納室
500 庫外フアン
1000 冷却装置
2000 冷却装置
3000 冷却装置
4000 自販機
1 2nd stage compressor 1a 1st stage compression part 1b 2nd stage compression part 2 1st stage heat exchanger (intermediate heat exchanger)
3 Second stage heat exchanger (gas cooler)
4 Expansion mechanism (electronic expansion valve)
5 On-off valve 6 Check valve 7 Evaporator 8 Check valve 9 On-off valve 10 Check valve 11 First stage heat exchanger bypass pipe 12 First stage compressed refrigerant pipe 13 Second stage compressed refrigerant pipe 17 Thermal refrigerant feed pipe 21 First stage Cooling refrigerant pipe 34 Second-stage compressed refrigerant pipe 47 Chilled refrigerant feed pipe 71 Chilled refrigerant return pipe 73 Chilled refrigerant return pipe 100 First heat recovery means (internal heat exchanger)
200 Second heat recovery means 300 Second stage heat exchanger bypass piping 400 Cabinet 401 Product storage 402 Product room 404 Product replenishment door 405 Inner door 406 Front door 407 Product 408 Product storage rack 409 Product takeout port 410 Product guide plate 411 Internal component storage room 414 Internal fan 415 Fan cover 416 Internal temperature sensor 417 Rear duct 418 Condensing unit 419 Machine room 420 Electrical component storage room 500 External fan 1000 Cooling device 2000 Cooling device 3000 Cooling device 4000 Vending machine

Claims (7)

冷媒をそれぞれ所定圧力にまで圧縮する一段目圧縮部および二段目圧縮部を具備する二段圧縮機と、冷媒を冷却する熱交換器と、冷媒を膨張させる膨張機構と、冷媒を蒸発または凝縮させる複数の蒸発器と、を有する冷却装置であって、
冷媒を前記一段目圧縮部の出側から前記二段目圧縮部の入側に直接供給自在にしたことを特徴とする冷却装置。
A two-stage compressor including a first-stage compression unit and a second-stage compression unit that respectively compress the refrigerant to a predetermined pressure, a heat exchanger that cools the refrigerant, an expansion mechanism that expands the refrigerant, and evaporation or condensation of the refrigerant A plurality of evaporators, and a cooling device comprising:
A cooling device characterized in that the refrigerant can be directly supplied from the outlet side of the first-stage compression unit to the entry side of the second-stage compression unit.
冷媒を所定圧力にまで圧縮する二段圧縮機の一段目圧縮部と、
該一段目圧縮部において圧縮された冷媒が供給され、これを冷却する一段目熱交換器と、
該一段目熱交換器において冷却された冷媒が供給され、これを前記所定圧力より高い圧力にまで圧縮する二段圧縮機の二段目圧縮部と、
該二段目圧縮部において圧縮された冷媒が供給され、これを冷却する二段目熱交換器と、
該二段目熱交換器において冷却された冷媒が供給され、これを膨張させる膨張機構と、
該膨張機構において膨張された冷媒または前記二段目圧縮部において圧縮された冷媒が供給され、これを蒸発または凝縮させる複数の蒸発器と、
前記二段圧縮機の一段目圧縮部の出側と前記一段目熱交換器の入側とを開閉弁を介して連結する一段目圧縮冷媒配管と、
前記一段目熱交換器の出側と前記二段圧縮機の二段目圧縮部の入側とを連結する一段目冷却冷媒配管と、
前記二段圧縮機の二段目圧縮部の出側と前記二段目熱交換器の入側とを開閉弁を介して連結する二段目圧縮冷媒配管と
前記二段目熱交換器の出側と前記膨張機構の入側とを連結する二段目冷却冷媒配管と、
前記膨張機構の出側と前記複数の蒸発器の入側とを開閉弁を介して連結する冷熱冷媒送り配管と、
前記複数の蒸発器の出側と前記二段圧縮機の一段目圧縮部の入側とを連結する冷熱冷媒戻り配管と、を有する冷却装置であって、
前記複数の蒸発器の一部が冷媒を蒸発する専用蒸発器とし、その他の蒸発器が冷媒を蒸発または凝縮する兼用蒸発器とし、
前記二段圧縮機の一段目圧縮部の出側と二段圧縮部の入側とを開閉弁を介して連結する一段目熱交換器バイパス配管と、
前記二段圧縮機の二段目圧縮部の出側と前記兼用蒸発器の入側とを開閉弁および逆止弁を介して連結する温熱冷媒送り配管と、
前記兼用蒸発器の冷熱冷媒戻り配管から分岐して、前記兼用蒸発器の出側と前記二段目熱交換器の入側とを逆止弁を介して連結する温熱冷媒戻り配管と、
前記兼用蒸発器の冷熱冷媒戻り配管の前記分岐位置より前記二段圧縮機の一段目圧縮部寄りに設置された開閉弁とを有することを特徴とする冷却装置。
A first stage compression unit for compressing the refrigerant to a predetermined pressure;
A first stage heat exchanger that is supplied with the refrigerant compressed in the first stage compression section and cools the refrigerant;
A refrigerant cooled in the first-stage heat exchanger is supplied, and a second-stage compression section of a two-stage compressor that compresses the refrigerant to a pressure higher than the predetermined pressure;
A second stage heat exchanger that is supplied with the refrigerant compressed in the second stage compression section and cools the refrigerant;
An expansion mechanism for supplying the refrigerant cooled in the second-stage heat exchanger and expanding the refrigerant;
A plurality of evaporators which are supplied with the refrigerant expanded in the expansion mechanism or the refrigerant compressed in the second-stage compression unit, and evaporate or condense the refrigerant;
A first-stage compressed refrigerant pipe that connects an outlet side of the first-stage compression unit of the second-stage compressor and an inlet side of the first-stage heat exchanger via an on-off valve;
A first-stage cooling refrigerant pipe connecting the outlet side of the first-stage heat exchanger and the inlet side of the second-stage compression unit of the second-stage compressor;
A second-stage compressed refrigerant pipe connecting the outlet side of the second-stage compressor of the second-stage compressor and the inlet side of the second-stage heat exchanger via an on-off valve; and the outlet of the second-stage heat exchanger A second-stage cooling refrigerant pipe connecting the side and the inlet side of the expansion mechanism;
A cooling / refrigerant refrigerant feed pipe connecting the outlet side of the expansion mechanism and the inlet side of the plurality of evaporators via an on-off valve;
A cooling device having a cooling / refrigerant return pipe connecting an outlet side of the plurality of evaporators and an inlet side of a first stage compression unit of the two-stage compressor,
A part of the plurality of evaporators is a dedicated evaporator that evaporates the refrigerant, and the other evaporator is a combined evaporator that evaporates or condenses the refrigerant,
A first-stage heat exchanger bypass pipe that connects the outlet side of the first-stage compression section of the second-stage compressor and the inlet side of the second-stage compression section via an on-off valve;
A hot refrigerant feed pipe connecting the outlet side of the second-stage compressor of the two-stage compressor and the inlet side of the dual-use evaporator via an on-off valve and a check valve;
A hot refrigerant return pipe that branches off from the cold refrigerant return pipe of the dual-purpose evaporator and connects the outlet side of the dual-purpose evaporator and the inlet side of the second-stage heat exchanger via a check valve;
A cooling device comprising: an on-off valve installed closer to the first-stage compression portion of the two-stage compressor than the branch position of the cold refrigerant return pipe of the dual-purpose evaporator.
前記二段目圧縮冷媒配管を通過する冷媒と前記冷熱冷媒戻り配管を通過する冷媒との間で熱交換する、第一熱回収手段を有することを特徴とする請求項2記載の冷却装置。   The cooling device according to claim 2, further comprising first heat recovery means for exchanging heat between the refrigerant passing through the second-stage compressed refrigerant pipe and the refrigerant passing through the cold refrigerant return pipe. 前記温熱冷媒戻り配管を通過する冷媒と前記冷熱冷媒戻り配管を通過する冷媒との間で熱交換する第二熱回収手段を有することを特徴とする請求項2または3記載の冷却装置。   4. The cooling device according to claim 2, further comprising second heat recovery means for exchanging heat between the refrigerant passing through the hot refrigerant return pipe and the refrigerant passing through the cold refrigerant return pipe. 前記冷媒が二酸化炭素(CO2)であることを特徴とする請求項2乃至4の何れかに記載の冷却装置。 The cooling device according to claim 2, wherein the refrigerant is carbon dioxide (CO 2 ). 断熱材によって囲まれ一面に開口部を具備する筐体と、該筐体を複数の商品収納庫に分割する仕切板と、前記商品収納庫のそれぞれに対応する商品搬出口を具備し、前記開口部を開閉する断熱扉と、前記商品収納庫のそれぞれに配置され、商品を収納して順次下方に搬出する機能を有する商品ラックと、前記商品ラックから落下した商品を前記商品搬出口に誘導するシュータと、該シュータの下方に配置されて前記商品収納庫内の空気を冷却または加熱する収納庫内熱交換手段と、該収納庫内熱交換手段を通過する空気の流れを形成する送風手段と、前記冷却手段によって冷却された空気を前記商品ラックの内部を経由して前記送風手段に循環させるための循環ダクトとを有する自動販売機であって、
前記収納庫内熱交換手段が、請求項1乃至5の何れかに記載の冷却装置における蒸発器であることを特徴とする自動販売機。
A housing that is surrounded by a heat insulating material and has an opening on one side, a partition plate that divides the housing into a plurality of product storages, and a product exit corresponding to each of the product storages, the opening A heat insulating door that opens and closes the product, a product rack that is disposed in each of the product storage units and has a function of storing products and sequentially transporting them downward, and guiding products dropped from the product rack to the product delivery port A shouter, a heat exchanger in the storage that is disposed below the shooter and cools or heats the air in the product storage, and a blower that forms a flow of air that passes through the heat exchanger in the storage A vending machine having a circulation duct for circulating the air cooled by the cooling means to the blowing means via the inside of the commodity rack,
The vending machine, wherein the internal heat exchange means is an evaporator in the cooling device according to any one of claims 1 to 5.
前記商品収納庫の外部に収納庫外熱交換手段が設置され、該収納庫外熱交換手段が、請求項2乃至5の何れかに記載の冷却装置における専用蒸発器であることを特徴とする自動販売機。
The outside heat storage means is installed outside the product storage, and the outside heat exchange means is a dedicated evaporator in the cooling device according to any one of claims 2 to 5. vending machine.
JP2005297414A 2005-10-12 2005-10-12 Cooling device and vending machine Pending JP2007108915A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009277080A (en) * 2008-05-15 2009-11-26 Fuji Electric Retail Systems Co Ltd Vending machine
JP2010020711A (en) * 2008-07-14 2010-01-28 Fuji Electric Retail Systems Co Ltd Vending machine
JP2010033520A (en) * 2008-07-31 2010-02-12 Fuji Electric Retail Systems Co Ltd Vending machine
JP2014112012A (en) * 2012-12-05 2014-06-19 Fuji Electric Co Ltd Refrigerant circuit device

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JPH05233941A (en) * 1992-02-26 1993-09-10 Fuji Electric Co Ltd Stockroom cooling and heating device for automatic vending machine
JP2004078440A (en) * 2002-08-14 2004-03-11 Kubota Corp Cooling and heating device of vending machine
JP2004326400A (en) * 2003-04-24 2004-11-18 Fuji Electric Holdings Co Ltd Vending machine
JP2005214558A (en) * 2004-01-30 2005-08-11 Sanyo Electric Co Ltd Heating/cooling system

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Publication number Priority date Publication date Assignee Title
JPH05233941A (en) * 1992-02-26 1993-09-10 Fuji Electric Co Ltd Stockroom cooling and heating device for automatic vending machine
JP2004078440A (en) * 2002-08-14 2004-03-11 Kubota Corp Cooling and heating device of vending machine
JP2004326400A (en) * 2003-04-24 2004-11-18 Fuji Electric Holdings Co Ltd Vending machine
JP2005214558A (en) * 2004-01-30 2005-08-11 Sanyo Electric Co Ltd Heating/cooling system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009277080A (en) * 2008-05-15 2009-11-26 Fuji Electric Retail Systems Co Ltd Vending machine
JP2010020711A (en) * 2008-07-14 2010-01-28 Fuji Electric Retail Systems Co Ltd Vending machine
JP2010033520A (en) * 2008-07-31 2010-02-12 Fuji Electric Retail Systems Co Ltd Vending machine
JP2014112012A (en) * 2012-12-05 2014-06-19 Fuji Electric Co Ltd Refrigerant circuit device

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