JP2007071519A - Cooling system - Google Patents

Cooling system Download PDF

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Publication number
JP2007071519A
JP2007071519A JP2005262468A JP2005262468A JP2007071519A JP 2007071519 A JP2007071519 A JP 2007071519A JP 2005262468 A JP2005262468 A JP 2005262468A JP 2005262468 A JP2005262468 A JP 2005262468A JP 2007071519 A JP2007071519 A JP 2007071519A
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Prior art keywords
refrigerant
circuit
heat exchanger
cooling system
refrigeration circuit
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JP2005262468A
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Japanese (ja)
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Makoto Kobayashi
誠 小林
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Sanden Corp
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Sanden Corp
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Priority to JP2005262468A priority Critical patent/JP2007071519A/en
Priority to US11/530,459 priority patent/US20070056312A1/en
Priority to CNA200610151527XA priority patent/CN1928461A/en
Publication of JP2007071519A publication Critical patent/JP2007071519A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/22—Refrigeration systems for supermarkets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling system with high safety, capable of preventing leaking of a refrigerant into a room interior (excluding a machine chamber interior). <P>SOLUTION: In the cooling system, since a first freezing circuit 10 communicating a high pressure first refrigerant is arranged in a chamber exterior, and a second freezing circuit 20 conducting a high pressure second refrigerant is arranged in a refrigeration showcase C, a pipe arrangement in which passing the high pressure first and second refrigerants flow will not be arranged in a room interior A side. Thereby, there is no danger of leaking of the high pressure first and second refrigerants into the room interior A, and safety can be improved. Since a heating medium circuit 30 is interposed between the first freezing circuit 10 and the second freezing circuit 20, even when there is a case of having a place of the refrigeration showcase C placed in the room interior A side being far from the room exterior B, there is no need to lengthen pipe arrangements of the first freezing circuit 10 and the second freezing circuit 20. By this, the amounts of the first and second refrigerants used can be minimized, and safety can be further improved. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、空気調和装置、冷凍・冷蔵庫、冷蔵ショーケース等に用いられる冷却システムに関する。   The present invention relates to a cooling system used for an air conditioner, a freezer / refrigerator, a refrigerated showcase, and the like.

従来、空気調和装置、冷凍・冷蔵庫、冷蔵ショーケース等に用いられる冷却システムにおいて一般的に使用される冷媒はフロンであったが、フロンが地球を取り巻くオゾン層を破壊することが問題となっているため、近年、フロンの代替冷媒としてアンモニアや二酸化炭素等の自然系冷媒を使用した冷却システムが知られている。このような冷却システムとして、例えば、冷蔵ショーケース内に圧縮機、凝縮器、膨張弁及び蒸発器が設置された冷却システムが知られているが、このような一元冷却システムでは冷凍効率が悪かった。   Conventionally, the refrigerant generally used in cooling systems used in air conditioners, refrigerators / refrigerators, refrigerated showcases, etc. has been chlorofluorocarbon, but it has become a problem that chlorofluorocarbons destroy the ozone layer surrounding the earth. Therefore, in recent years, a cooling system using a natural refrigerant such as ammonia or carbon dioxide as an alternative refrigerant for Freon is known. As such a cooling system, for example, a cooling system in which a compressor, a condenser, an expansion valve, and an evaporator are installed in a refrigerated showcase is known. However, the refrigeration efficiency is poor in such a single cooling system. .

そこで、この問題を解決するために、図３に示す冷却システム及び図４に示す二元冷却システムが知られている（例えば、特許文献１参照）。   In order to solve this problem, a cooling system shown in FIG. 3 and a dual cooling system shown in FIG. 4 are known (see, for example, Patent Document 1).

図３及び図４に示す冷却システムは、圧縮機５１ａ、凝縮器５１ｂ、膨張弁５１ｃ及び外気熱交換器５３からなり、冷媒であるアンモニアが流れるアンモニア回路５１と、圧縮機５２ａ、膨張弁５２ｂ、蒸発器５２ｃ及び熱交換器５３からなり、冷媒である二酸化炭素が流れる二酸化炭素回路５２とを備えている。また、圧縮機５２ａと熱交換器５３とは配管５３ａによって接続され、膨張弁５２ｂと熱交換器５３とは配管５３ｂによって接続されている。   The cooling system shown in FIGS. 3 and 4 includes a compressor 51a, a condenser 51b, an expansion valve 51c, and an outside air heat exchanger 53, an ammonia circuit 51 through which ammonia as a refrigerant flows, a compressor 52a, an expansion valve 52b, The apparatus includes an evaporator 52c and a heat exchanger 53, and a carbon dioxide circuit 52 through which carbon dioxide as a refrigerant flows. The compressor 52a and the heat exchanger 53 are connected by a pipe 53a, and the expansion valve 52b and the heat exchanger 53 are connected by a pipe 53b.

このように構成された図３に示す冷却システムのうち圧縮機５２ａ、膨張弁５２ｂ及び蒸発器５２ｃは室内Ａ側（図３に示す二点鎖線）に置かれた冷蔵ショーケースＣ内に設置され、図４に示す冷却システムのうち膨張弁５２ｂ及び蒸発器５２ｃは室内Ａ側（図４に示す二点鎖線）に置かれた冷蔵ショーケースＣ内に設置されている。また、図３及び図４に示す冷却システムのうちアンモニア回路５１は室外Ｂ側に設置されている。
特開２００４−１７０００７号公報 Of the cooling system shown in FIG. 3, the compressor 52a, the expansion valve 52b, and the evaporator 52c are installed in a refrigerated showcase C placed on the room A side (two-dot chain line shown in FIG. 3). In the cooling system shown in FIG. 4, the expansion valve 52b and the evaporator 52c are installed in a refrigerated showcase C placed on the room A side (two-dot chain line shown in FIG. 4). Further, in the cooling system shown in FIGS. 3 and 4, the ammonia circuit 51 is installed on the outdoor B side.
JP 2004-170007 A

しかしながら、内部に高温高圧の冷媒が流れている配管５３ａや、内部に高圧の冷媒が流れている配管５３ｂは、室内Ａにおいて露出して配置されているため、室内Ａに冷媒が洩れ出すおそれがある。   However, since the pipe 53a in which the high-temperature and high-pressure refrigerant flows inside and the pipe 53b in which the high-pressure refrigerant flows inside are arranged exposed in the room A, the refrigerant may leak into the room A. is there.

また、室内Ａ側に置かれた冷蔵ショーケースＣの場所によっては各配管５３ａ，５３ｂが長くなる。各配管５３ａ，５３ｂが長くなると、その長さ分に応じて冷媒の封入量が増加するので、高圧の冷媒が室内Ａに漏れてしまった際には大量の冷媒が室内Ａに洩れ出すおそれがある。   Further, depending on the location of the refrigerated showcase C placed on the room A side, the pipes 53a and 53b become longer. If each of the pipes 53a and 53b becomes longer, the amount of refrigerant enclosed increases according to the length of the pipes 53a and 53b. Therefore, when a high-pressure refrigerant leaks into the room A, a large amount of refrigerant may leak into the room A. is there.

本発明は、上記事情に鑑みてなされたものであり、その目的とするところは、室内（室内側冷熱機器の機械室内を除く）に冷媒が洩れることを防止できる安全性の高い冷却システムを提供することにある。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a highly safe cooling system capable of preventing the refrigerant from leaking into the room (excluding the machine room of the indoor side cooling equipment). There is to do.

上記目的を達成するために、本発明の冷却システムは、第１圧縮機、第１凝縮器、第１膨張機構及び第１熱交換器からなり、第１冷媒を流通する第１冷凍回路と、第２圧縮機、第２熱交換器、第２膨張機構及び蒸発器からなり、第２冷媒を流通する第２冷凍回路と、第１熱交換器の第１冷媒と第２熱交換器の第２冷媒とを熱交換する熱媒体を流通する熱媒体回路とを備え、第１冷凍回路を室外側に配置し、第２冷凍回路を室内側冷熱機器の機械室内に配置した構成となっている。   In order to achieve the above object, a cooling system of the present invention includes a first compressor, a first condenser, a first expansion mechanism, and a first heat exchanger, and a first refrigeration circuit that circulates a first refrigerant, The second refrigeration circuit, which includes the second compressor, the second heat exchanger, the second expansion mechanism, and the evaporator, distributes the second refrigerant, the first refrigerant of the first heat exchanger, and the second of the second heat exchanger. And a heat medium circuit that circulates a heat medium that exchanges heat with the refrigerant, the first refrigeration circuit is arranged outside the room, and the second refrigeration circuit is arranged inside the machine room of the indoor-side refrigeration equipment. .

本発明の冷却システムによれば、高圧の第１冷媒が流通する第１冷凍回路が室外に配置され、高圧の第２冷媒が流通する第２冷凍回路が室内側冷熱機器の機械室内に配置される。そして、第１冷凍回路と第２冷凍回路との間には熱媒体回路が介在し、熱媒体回路によって第１冷凍回路の第１冷媒と第２冷凍回路の第２冷媒が熱交換される。これにより、高圧の第１及び第２冷媒が流れる配管が室内に配置されることがない（室内側冷熱機器の機械室内にある配管は含まない）。また、機械室の場所が室外から遠くなる場合であっても、第１冷凍回路や第２冷凍回路の配管を長くする必要がない。   According to the cooling system of the present invention, the first refrigeration circuit in which the high-pressure first refrigerant flows is arranged outside the room, and the second refrigeration circuit in which the high-pressure second refrigerant flows is arranged in the machine room of the indoor-side refrigeration equipment. The A heat medium circuit is interposed between the first refrigeration circuit and the second refrigeration circuit, and heat exchange is performed between the first refrigerant in the first refrigeration circuit and the second refrigerant in the second refrigeration circuit. Thereby, the piping through which the high-pressure first and second refrigerants flow is not arranged indoors (the piping in the machine room of the indoor-side refrigeration equipment is not included). Moreover, even if the location of the machine room is far from the outside, it is not necessary to lengthen the piping of the first refrigeration circuit or the second refrigeration circuit.

本発明によれば、第１冷凍回路を室外に配置し、第２冷凍回路を機械室内に配置しているので、高圧の第１及び第２冷媒が流れる配管が室内に配置されることがない（室内側冷熱機器の機械室内にある配管は含まない）。これにより、室内に高圧の第１又は第２冷媒が洩れるおそれがなく、安全性を向上させることができる。また、第１冷凍回路と第２冷凍回路との間には熱媒体回路が介在するので、室内に置かれた機械室の場所が室外から遠くなる場合であっても、第１冷凍回路や第２冷凍回路の配管を長くする必要がない。これにより、第１又は第２冷媒使用量を最小限にすることができ、安全性をより向上させることができる。   According to the present invention, since the first refrigeration circuit is disposed outside the room and the second refrigeration circuit is disposed inside the machine room, the piping through which the high-pressure first and second refrigerants flow is not arranged indoors. (Does not include piping in the machine room of the indoor side cooling equipment). Thereby, there is no possibility that the high-pressure first or second refrigerant leaks into the room, and safety can be improved. In addition, since the heat medium circuit is interposed between the first refrigeration circuit and the second refrigeration circuit, the first refrigeration circuit and the second refrigeration circuit can be used even when the location of the machine room placed indoors is far from the outside. 2. There is no need to lengthen the piping of the refrigeration circuit. Thereby, the usage-amount of a 1st or 2nd refrigerant | coolant can be minimized and safety can be improved more.

図１は本発明の第１実施形態に係る冷却システムの概略構成図を示すものである。   FIG. 1 is a schematic configuration diagram of a cooling system according to a first embodiment of the present invention.

同図に示す冷却システムは、第１冷凍回路１０、第２冷凍回路２０及び熱媒体回路３０とから構成されている。   The cooling system shown in the figure includes a first refrigeration circuit 10, a second refrigeration circuit 20, and a heat medium circuit 30.

第１冷凍回路１０は、第１圧縮機１１、第１凝縮器１２、第１膨張機構である第１膨張弁１３及び第１熱交換器１４からなり、第１圧縮機１１→第１凝縮器１２→第１膨張弁１３→第１熱交換器１４→第１圧縮機１１の順に第１冷媒を循環させることができる。この第１冷凍回路１０で使用される第１冷媒は、自然系冷媒（例えば、アンモニア）である。   The first refrigeration circuit 10 includes a first compressor 11, a first condenser 12, a first expansion valve 13 that is a first expansion mechanism, and a first heat exchanger 14, and the first compressor 11 → the first condenser. The first refrigerant can be circulated in the order of 12 → first expansion valve 13 → first heat exchanger 14 → first compressor 11. The first refrigerant used in the first refrigeration circuit 10 is a natural refrigerant (for example, ammonia).

第２冷凍回路２０は、第２圧縮機２１、第２熱交換器２２、第２膨張機構である第２膨張弁２３及び蒸発器２４からなり、第２圧縮機２１→第２熱交換器２２→第２膨張弁２３→蒸発器２４→第２圧縮機２１の順に第２冷媒を循環させることができる。この第２冷凍回路２０で使用される第２冷媒は、自然系冷媒（例えば、二酸化炭素）である。   The second refrigeration circuit 20 includes a second compressor 21, a second heat exchanger 22, a second expansion valve 23 that is a second expansion mechanism, and an evaporator 24, and the second compressor 21 → the second heat exchanger 22. The second refrigerant can be circulated in the order of the second expansion valve 23, the evaporator 24, and the second compressor 21. The second refrigerant used in the second refrigeration circuit 20 is a natural refrigerant (for example, carbon dioxide).

熱媒体回路３０は、第１熱交換器１４、第２熱交換器２２及び循環用ポンプ３１からなる。つまり、第１熱交換器１４は第１冷凍回路１０と熱媒体回路３０とによって共有され、第２熱交換器２２は第２冷凍回路２０と熱媒体回路３０とによって共有されている。また、熱媒体回路３０は、第１熱交換器１４→循環用ポンプ３１→第２熱交換器２２→第１熱交換器１４の順に熱媒体を循環させることができる。この熱媒体回路３０で使用される熱媒体は、ブライン（例えば塩化カルシウム溶液）や水である。   The heat medium circuit 30 includes a first heat exchanger 14, a second heat exchanger 22, and a circulation pump 31. That is, the first heat exchanger 14 is shared by the first refrigeration circuit 10 and the heat medium circuit 30, and the second heat exchanger 22 is shared by the second refrigeration circuit 20 and the heat medium circuit 30. The heat medium circuit 30 can circulate the heat medium in the order of the first heat exchanger 14 → the circulation pump 31 → the second heat exchanger 22 → the first heat exchanger 14. The heat medium used in the heat medium circuit 30 is brine (for example, calcium chloride solution) or water.

以上のように構成された冷却システムは、第１冷凍回路１０と第１熱交換器１４を室外Ｂ側に配置し、第２冷凍回路２０と第２熱交換器２２が室内Ａ（図１に示す二点鎖線）側冷熱機器である冷蔵ショーケースＣの機械室内に配置した。   In the cooling system configured as described above, the first refrigeration circuit 10 and the first heat exchanger 14 are arranged on the outdoor B side, and the second refrigeration circuit 20 and the second heat exchanger 22 are arranged in the room A (see FIG. 1). The two-dot chain line shown) was placed in the machine room of the refrigerated showcase C which is a side refrigeration equipment.

次に、図１に示す冷却システムの動作を説明する。   Next, the operation of the cooling system shown in FIG. 1 will be described.

第１冷凍回路１０の第１冷媒は、第１圧縮機１１→第１凝縮器１２→第１膨張弁１３→第１熱交換器１４→第１圧縮機１１の順に循環する（図１の破線矢印参照）。また、第２冷凍回路２０の第２冷媒は、第２圧縮機２１→第２熱交換器２２→第２膨張弁２３→蒸発器２４→第２圧縮機２１の順に循環する（図１の実線矢印参照）。さらに、熱媒体回路３０の熱媒体は、第１熱交換器１４→循環用ポンプ３１→第２熱交換器２２→第１熱交換器１４の順に循環する（図１の太線矢印参照）。このように第１又は第２冷媒や熱媒体が各回路１０，２０，３０を循環することにより、第１熱交換器１４では第１冷凍回路１０を流れる第１冷媒と熱媒体回路３０を流れる熱媒体との間で熱交換され、第２熱交換器２２では第２冷凍回路２０を流れる第２冷媒と熱媒体回路３０を流れる熱媒体との間で熱交換される。これにより冷却された第２冷媒によって、室内Ａ側に置かれた冷蔵ショーケースＣ内が冷却される。   The first refrigerant in the first refrigeration circuit 10 circulates in the order of the first compressor 11 → the first condenser 12 → the first expansion valve 13 → the first heat exchanger 14 → the first compressor 11 (broken line in FIG. 1). See arrow). Further, the second refrigerant in the second refrigeration circuit 20 circulates in the order of the second compressor 21 → the second heat exchanger 22 → the second expansion valve 23 → the evaporator 24 → the second compressor 21 (the solid line in FIG. 1). See arrow). Furthermore, the heat medium of the heat medium circuit 30 circulates in the order of the first heat exchanger 14 → the circulation pump 31 → the second heat exchanger 22 → the first heat exchanger 14 (see the thick arrow in FIG. 1). As described above, the first or second refrigerant or the heat medium circulates through the circuits 10, 20, and 30, so that the first heat exchanger 14 flows through the first refrigerant and the heat medium circuit 30 that flows through the first refrigeration circuit 10. Heat is exchanged between the heat medium and the second heat exchanger 22 exchanges heat between the second refrigerant flowing through the second refrigeration circuit 20 and the heat medium flowing through the heat medium circuit 30. The inside of the refrigerated showcase C placed on the room A side is cooled by the second refrigerant thus cooled.

このように、本実施形態の冷却システムによれば、高圧の第１冷媒が流通する第１冷凍回路１０を室外に配置し、高圧の第２冷媒が流通する第２冷凍回路２０が冷蔵ショーケースＣ内に配置しているので、高圧の第１又は第２冷媒が流れる配管が室内Ａ側に配置されることがない（冷蔵ショーケースＣの機械室内にある配管は含まない）。これにより、室内Ａに高圧の第１又は第２冷媒が洩れるおそれがなく、安全性を向上させることができる。   As described above, according to the cooling system of the present embodiment, the first refrigeration circuit 10 through which the high-pressure first refrigerant flows is arranged outdoors, and the second refrigeration circuit 20 through which the high-pressure second refrigerant flows is refrigerated showcase. Since it is arranged in C, the pipe through which the high-pressure first or second refrigerant flows is not arranged on the room A side (the pipe in the machine room of the refrigerated showcase C is not included). Thereby, there is no possibility that the high-pressure first or second refrigerant leaks into the room A, and safety can be improved.

また、第１冷凍回路１０と第２冷凍回路２０との間には熱媒体回路３０が介在するので、室内Ａ側に置かれた冷蔵ショーケースＣの場所が室外Ｂから遠くなる場合であっても、第１冷凍回路１０や第２冷凍回路２０の配管を長くする必要がない。これにより、第１又は第２冷媒使用量を最小限にすることができ、安全性をより向上させることができる。   In addition, since the heat medium circuit 30 is interposed between the first refrigeration circuit 10 and the second refrigeration circuit 20, the location of the refrigerated showcase C placed on the indoor A side is far from the outdoor B. However, it is not necessary to lengthen the pipes of the first refrigeration circuit 10 and the second refrigeration circuit 20. Thereby, the usage-amount of a 1st or 2nd refrigerant | coolant can be minimized and safety can be improved more.

図２は本発明の第２実施形態に係る冷却システムの概略構成図を示すものである。尚、図１で示した冷却システム１と同一構成部分は同一符号をもって表し、その説明を省略する。   FIG. 2 shows a schematic configuration diagram of a cooling system according to the second embodiment of the present invention. The same components as those of the cooling system 1 shown in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.

図２に示す冷却システムは、熱媒体回路４０が自然対流を利用した周知のサーモサイフォン式回路を採用し、循環用ポンプ３１を必要としない点で図１で示した冷却システムと異なる。   The cooling system shown in FIG. 2 is different from the cooling system shown in FIG. 1 in that the heat medium circuit 40 employs a well-known thermosiphon circuit using natural convection and does not require the circulation pump 31.

また、図２に示す冷却システムは、熱媒体回路４０で使用される熱媒体として、低圧の作動流体を用いた点で図１で示した冷却システムと異なる。   Further, the cooling system shown in FIG. 2 is different from the cooling system shown in FIG. 1 in that a low-pressure working fluid is used as a heat medium used in the heat medium circuit 40.

熱媒体回路４０は、第１熱交換器１４及び第２熱交換器２２からなる。つまり、第１熱交換器１４は第１冷凍回路１０と熱媒体回路４０とによって共有され、第２熱交換器２２は第２冷凍回路２０と熱媒体回路４０とによって共有されている。また、熱媒体回路４０はサーモサイフォン式回路を採用したので、自然対流を利用して第１熱交換器１４→第２熱交換器２２→第１熱交換器１４の順に低圧の作動流体を循環させることができる。この熱媒体回路３０で使用される作動流体は、低圧の冷媒（例えば水またはアルコール）である。   The heat medium circuit 40 includes the first heat exchanger 14 and the second heat exchanger 22. That is, the first heat exchanger 14 is shared by the first refrigeration circuit 10 and the heat medium circuit 40, and the second heat exchanger 22 is shared by the second refrigeration circuit 20 and the heat medium circuit 40. Further, since the heat medium circuit 40 employs a thermosiphon circuit, a low-pressure working fluid is circulated in the order of the first heat exchanger 14 → the second heat exchanger 22 → the first heat exchanger 14 using natural convection. Can be made. The working fluid used in the heat medium circuit 30 is a low-pressure refrigerant (for example, water or alcohol).

以上のように構成された冷却システムは、第１冷凍回路１０と第１熱交換器１４を室外Ｂ側に配置し、第２冷凍回路２０と第２熱交換器２２を室内Ａ（図２に示す二点鎖線）側冷熱機器である冷蔵ショーケースＣの機械室内に配置した。   In the cooling system configured as described above, the first refrigeration circuit 10 and the first heat exchanger 14 are disposed on the outdoor B side, and the second refrigeration circuit 20 and the second heat exchanger 22 are disposed in the room A (see FIG. 2). The two-dot chain line shown) was placed in the machine room of the refrigerated showcase C which is a side refrigeration equipment.

次に、図２に示す冷却システムの動作を説明する。   Next, the operation of the cooling system shown in FIG. 2 will be described.

第１冷凍回路１０の第１冷媒と第２冷凍回路２０の第２冷媒の循環は、前記第１実施形態と同様であるので、その説明を省略する。熱媒体回路４０の作動流体は、第１熱交換器１４→第２熱交換器２２→第１熱交換器１４の順に循環する（図２の太線矢印参照）。このように各回路１０，２０，４０があり、熱媒体回路４０を低圧の作動流体が循環することにより、第１熱交換器１４において第１冷凍回路１０を流れる第１冷媒と熱媒体回路４０を流れる低圧の作動流体との間で熱交換され、第２熱交換器２２において第２冷凍回路２０を流れる第２冷媒と熱媒体回路４０を流れる低圧の作動流体との間で熱交換される。これにより、室内Ａ側に置かれた冷蔵ショーケースＣ内が冷却される。   Since the circulation of the first refrigerant in the first refrigeration circuit 10 and the second refrigerant in the second refrigeration circuit 20 is the same as that in the first embodiment, description thereof is omitted. The working fluid of the heat medium circuit 40 circulates in the order of the first heat exchanger 14 → the second heat exchanger 22 → the first heat exchanger 14 (see the thick arrow in FIG. 2). As described above, the circuits 10, 20, and 40 are provided, and the low-pressure working fluid circulates through the heat medium circuit 40, whereby the first refrigerant flowing through the first refrigeration circuit 10 and the heat medium circuit 40 in the first heat exchanger 14 are provided. Is exchanged between the second refrigerant flowing through the second refrigeration circuit 20 and the low-pressure working fluid flowing through the heat medium circuit 40 in the second heat exchanger 22. . Thereby, the inside of the refrigerated showcase C placed on the room A side is cooled.

本実施形態の冷却システムによれば、室内Ａ側に配置された熱媒体回路４０内を循環する作動流体は低圧なので、高圧の配管が室内Ａ側に配置されることがなく安全である。   According to the cooling system of the present embodiment, since the working fluid circulating in the heat medium circuit 40 disposed on the room A side is low pressure, high-pressure piping is not disposed on the room A side and is safe.

また、第１実施形態で示した冷却システム１と同様、高圧の第１又は第２冷媒が流れる配管が室内Ａ側に配置されるので、室内Ａ側に高圧の第１又は第２冷媒が洩れるおそれがなく、安全性を向上させることができる。また、第１冷凍回路１０と第２冷凍回路２０との間には熱媒体回路３０が介在するので、第１又は第２冷媒使用量を最小限にすることができ、安全性をより向上させることができる。   Further, similarly to the cooling system 1 shown in the first embodiment, since the pipe through which the high-pressure first or second refrigerant flows is arranged on the indoor A side, the high-pressure first or second refrigerant leaks on the indoor A side. There is no fear and safety can be improved. Further, since the heat medium circuit 30 is interposed between the first refrigeration circuit 10 and the second refrigeration circuit 20, the amount of the first or second refrigerant used can be minimized, and safety is further improved. be able to.

尚、前記第１実施形態及び第２実施形態は、第２冷凍回路２０と第２熱交換器２２が機械室である冷蔵ショーケースＣ内に配置されているとしたがこれに限らない。例えば、冷熱機器である空気調和装置、冷凍・冷蔵庫内に第２冷凍回路２０と第２熱交換器２２が配置されていてもよい。   In the first embodiment and the second embodiment, the second refrigeration circuit 20 and the second heat exchanger 22 are disposed in the refrigerated showcase C that is a machine room, but the present invention is not limited to this. For example, the 2nd freezing circuit 20 and the 2nd heat exchanger 22 may be arrange | positioned in the air conditioning apparatus which is a cooling-heat apparatus, and freezing / refrigerator.

本発明の第１実施形態に係る冷却システムの概略構成図1 is a schematic configuration diagram of a cooling system according to a first embodiment of the present invention. 本発明の第２実施形態に係る冷却システムの概略構成図The schematic block diagram of the cooling system which concerns on 2nd Embodiment of this invention. 従来例に係る冷却システムの概略構成図Schematic configuration diagram of a conventional cooling system 他の従来例に係る冷却システムの概略構成図Schematic configuration diagram of a cooling system according to another conventional example

符号の説明Explanation of symbols

１０…第１冷凍回路、１１…第１圧縮機、１２…第１凝縮器、１３…第１膨張弁、１４…第１熱交換器、２０…第２冷凍回路、２１…第２圧縮機、２２…第２熱交換器、２３…第２膨張弁、２４…蒸発器、３０…熱媒体回路、Ａ…室内、Ｂ…室外、Ｃ…冷蔵ショーケース。   DESCRIPTION OF SYMBOLS 10 ... 1st freezing circuit, 11 ... 1st compressor, 12 ... 1st condenser, 13 ... 1st expansion valve, 14 ... 1st heat exchanger, 20 ... 2nd freezing circuit, 21 ... 2nd compressor, 22 ... second heat exchanger, 23 ... second expansion valve, 24 ... evaporator, 30 ... heat medium circuit, A ... indoor, B ... outdoor, C ... refrigerated showcase.

Claims (5)

第１圧縮機、第１凝縮器、第１膨張機構及び第１熱交換器からなり、第１冷媒を流通する第１冷凍回路と、
第２圧縮機、第２熱交換器、第２膨張機構及び蒸発器からなり、第２冷媒を流通する第２冷凍回路と、
第１熱交換器の第１冷媒と第２熱交換器の第２冷媒とを熱交換する熱媒体を流通する熱媒体回路とを備え、
第１冷凍回路を室外側に配置し、第２冷凍回路を室内側冷熱機器の機械室内に配置した
ことを特徴とする冷却システム。 A first refrigeration circuit comprising a first compressor, a first condenser, a first expansion mechanism, and a first heat exchanger, and circulating a first refrigerant;
A second refrigeration circuit comprising a second compressor, a second heat exchanger, a second expansion mechanism and an evaporator, and circulating a second refrigerant;
A heat medium circuit that circulates a heat medium that exchanges heat between the first refrigerant of the first heat exchanger and the second refrigerant of the second heat exchanger;
A cooling system, wherein the first refrigeration circuit is arranged outside the room, and the second refrigeration circuit is arranged inside the machine room of the indoor-side refrigeration equipment. 前記熱媒体回路をポンプによって熱媒体が第１熱交換器と第２熱交換器に流通するように構成した
ことを特徴とする請求項１記載の冷却システム。 The cooling system according to claim 1, wherein the heat medium circuit is configured so that the heat medium flows through the first heat exchanger and the second heat exchanger by a pump. 前記熱媒体回路をサーモサイフォンによって熱媒体が第１熱交換器と第２熱交換器に流通するように構成した
ことを特徴とする請求項１記載の冷却システム。 The cooling system according to claim 1, wherein the heat medium circuit is configured so that the heat medium flows through the first heat exchanger and the second heat exchanger by a thermosiphon. 前記第１冷媒としてアンモニアを用いた
ことを特徴とする請求項１乃至３の何れか一項記載の冷却システム。 The cooling system according to any one of claims 1 to 3, wherein ammonia is used as the first refrigerant. 前記第２冷媒として二酸化炭素を用いた
ことを特徴とする請求項１乃至４の何れか一項記載の冷却システム。 The cooling system according to any one of claims 1 to 4, wherein carbon dioxide is used as the second refrigerant.
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013088032A (en) * 2011-10-18 2013-05-13 Sanden Corp Refrigerator, refrigerating showcase, and vending machine
JP2015014440A (en) * 2013-07-08 2015-01-22 サンデン株式会社 Showcase cooling device
CN104676933A (en) * 2015-01-19 2015-06-03 合肥华凌股份有限公司 Refrigerating equipment
CN105402976A (en) * 2015-12-09 2016-03-16 加西贝拉压缩机有限公司 Integrated refrigeration refrigerator
JP2016205785A (en) * 2015-04-28 2016-12-08 株式会社豊田中央研究所 Medium transportation system, heat storage system, and heat pump
JP2017137047A (en) * 2016-02-01 2017-08-10 ゼネラル・エレクトリック・カンパニイ Aircraft thermal management system
WO2021065944A1 (en) * 2019-09-30 2021-04-08 ダイキン工業株式会社 Air conditioning apparatus

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008130412A1 (en) * 2007-04-23 2008-10-30 Carrier Corporation Co2 refrigerant system with booster circuit
ES2784024T3 (en) * 2007-09-18 2020-09-21 Carrier Corp Methods and systems for controlling integrated air conditioning systems
ES2608404T3 (en) * 2007-11-13 2017-04-10 Carrier Corporation Cooling system and method for cooling
WO2009063055A1 (en) * 2007-11-15 2009-05-22 Shell Internationale Research Maatschappij B.V. A method and apparatus for cooling a process stream
US9989280B2 (en) * 2008-05-02 2018-06-05 Heatcraft Refrigeration Products Llc Cascade cooling system with intercycle cooling or additional vapor condensation cycle
CN101592416B (en) * 2008-05-28 2012-05-23 吕瑞强 Cooling and heating system with cooling-heating source complementing loop
US8769983B2 (en) * 2008-06-05 2014-07-08 Mitsubishi Electric Corporation Refrigeration cycle apparatus
JP5275929B2 (en) * 2008-08-26 2013-08-28 ホシザキ電機株式会社 Cooling system
JP5380226B2 (en) * 2009-09-25 2014-01-08 株式会社日立製作所 Air conditioning and hot water supply system and heat pump unit
TW201124687A (en) * 2009-11-03 2011-07-16 Du Pont Cascade refrigeration system with fluoroolefin refrigerant
KR101608538B1 (en) * 2009-12-31 2016-04-01 엘지전자 주식회사 Water circulation system associated with refrigerant cycle
WO2011113045A2 (en) * 2010-03-12 2011-09-15 Biofuels Automation, Inc. Heat transfer processes and equipment for industrial applications
US9657977B2 (en) 2010-11-17 2017-05-23 Hill Phoenix, Inc. Cascade refrigeration system with modular ammonia chiller units
US9541311B2 (en) * 2010-11-17 2017-01-10 Hill Phoenix, Inc. Cascade refrigeration system with modular ammonia chiller units
US9664424B2 (en) 2010-11-17 2017-05-30 Hill Phoenix, Inc. Cascade refrigeration system with modular ammonia chiller units
US9239174B2 (en) * 2011-02-17 2016-01-19 Rocky Research Cascade floating intermediate temperature heat pump system
EP2766675B1 (en) * 2011-09-30 2022-08-24 Carrier Corporation High efficiency refrigeration system
CN104949381B (en) * 2015-07-03 2019-05-14 严雪青 For the Combined type refrigerating process system in industrial cryogenic system
DE102015110994B4 (en) * 2015-07-08 2017-07-20 Uwe Pfütze Device and method for tempering a medium
CN105066503B (en) * 2015-08-25 2017-03-22 天津商业大学 Small-size leakproof independently-operating ammonia refrigerator
GB2543086B (en) * 2015-10-08 2018-05-02 Isentra Ltd Water-cooled carbon dioxide refrigeration system
US10429102B2 (en) * 2016-01-05 2019-10-01 Carrier Corporation Two phase loop distributed HVACandR system
WO2017187644A1 (en) * 2016-04-28 2017-11-02 株式会社ＥｘａＳｃａｌｅｒ Refrigeration system
US10648713B2 (en) 2017-02-08 2020-05-12 Titan, Llc Industrial heat transfer unit
CN107860131A (en) * 2017-11-06 2018-03-30 广东吉荣空调有限公司 More big temperature difference compression heat pump Hot water units of heat member
WO2019094031A1 (en) * 2017-11-10 2019-05-16 Hussmann Corporation Subcritical co2 refrigeration system using thermal storage
US11105539B2 (en) 2017-12-01 2021-08-31 Johnson Controls Technology Company Heating, ventilation, and air conditioning system with primary and secondary heat transfer loops
US11378318B2 (en) 2018-03-06 2022-07-05 Vilter Manufacturing Llc Cascade system for use in economizer compressor and related methods
CN109297254A (en) * 2018-09-10 2019-02-01 成都深冷液化设备股份有限公司 Using low temperature refrigerator group as the charging cable gas circulating cooling method of cold source
CN111207527A (en) * 2019-07-16 2020-05-29 山东优库制冷技术有限公司 Carbon dioxide secondary refrigerant refrigerating system
AU2019464673B2 (en) * 2019-09-04 2023-11-02 Daikin Europe N.V. Compressor unit and refrigeration apparatus
WO2022197893A1 (en) * 2021-03-17 2022-09-22 Alliance For Sustainable Energy, Llc Grid interactive micro-distributed refrigerated display case
IT202100024584A1 (en) 2021-09-24 2023-03-24 Arneg CABINET FOR REFRIGERATION AND CONTAINMENT OF FOOD PRODUCTS
CN114103591B (en) * 2021-11-18 2023-11-03 美的集团(上海)有限公司 Thermal management system of automobile and automobile

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08338667A (en) * 1995-06-13 1996-12-24 Sanyo Electric Co Ltd Freezer device
WO2000050822A1 (en) * 1999-02-24 2000-08-31 Hachiyo Engineering Co., Ltd. Heat pump system of combination of ammonia cycle and carbon dioxide cycle
JP2004308972A (en) * 2003-04-03 2004-11-04 Mayekawa Mfg Co Ltd Co2 refrigerating machine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1519353A (en) * 1920-08-31 1924-12-16 Bowen Dumars Power Corp Refrigeration and power system
US2456386A (en) * 1946-05-07 1948-12-14 Howell C Cooper Cascade refrigeration unit with controls therefor
US2966047A (en) * 1957-02-13 1960-12-27 Normalair Ltd Cooling of cabins and other compartments
US4291757A (en) * 1980-05-28 1981-09-29 Westinghouse Electric Corp. Multiple heat pump and heat balancing system for multi-stage material processing
AU606898B2 (en) * 1987-10-30 1991-02-21 Takenaka Corporation Air-conditioner using regenerative cooling cycle
US5335508A (en) * 1991-08-19 1994-08-09 Tippmann Edward J Refrigeration system
KR100858991B1 (en) * 2004-09-30 2008-09-18 마에카와 매뉴팩쳐링 캄파니 리미티드 Ammonia/CO2 Refrigeration System
US7310953B2 (en) * 2005-11-09 2007-12-25 Emerson Climate Technologies, Inc. Refrigeration system including thermoelectric module

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08338667A (en) * 1995-06-13 1996-12-24 Sanyo Electric Co Ltd Freezer device
WO2000050822A1 (en) * 1999-02-24 2000-08-31 Hachiyo Engineering Co., Ltd. Heat pump system of combination of ammonia cycle and carbon dioxide cycle
JP2004308972A (en) * 2003-04-03 2004-11-04 Mayekawa Mfg Co Ltd Co2 refrigerating machine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013088032A (en) * 2011-10-18 2013-05-13 Sanden Corp Refrigerator, refrigerating showcase, and vending machine
JP2015014440A (en) * 2013-07-08 2015-01-22 サンデン株式会社 Showcase cooling device
CN104676933A (en) * 2015-01-19 2015-06-03 合肥华凌股份有限公司 Refrigerating equipment
JP2016205785A (en) * 2015-04-28 2016-12-08 株式会社豊田中央研究所 Medium transportation system, heat storage system, and heat pump
CN105402976A (en) * 2015-12-09 2016-03-16 加西贝拉压缩机有限公司 Integrated refrigeration refrigerator
JP2017137047A (en) * 2016-02-01 2017-08-10 ゼネラル・エレクトリック・カンパニイ Aircraft thermal management system
WO2021065944A1 (en) * 2019-09-30 2021-04-08 ダイキン工業株式会社 Air conditioning apparatus
JPWO2021065944A1 (en) * 2019-09-30 2021-04-08

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