WO2018061185A1 - Dispositif à cycle frigorifique - Google Patents

Dispositif à cycle frigorifique Download PDF

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Publication number
WO2018061185A1
WO2018061185A1 PCT/JP2016/079040 JP2016079040W WO2018061185A1 WO 2018061185 A1 WO2018061185 A1 WO 2018061185A1 JP 2016079040 W JP2016079040 W JP 2016079040W WO 2018061185 A1 WO2018061185 A1 WO 2018061185A1
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WIPO (PCT)
Prior art keywords
refrigerant
water
passage
heat exchanger
heat exchange
Prior art date
Application number
PCT/JP2016/079040
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English (en)
Japanese (ja)
Inventor
正紘 伊藤
Original Assignee
三菱電機株式会社
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Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2016/079040 priority Critical patent/WO2018061185A1/fr
Priority to JP2018541836A priority patent/JP6719570B2/ja
Publication of WO2018061185A1 publication Critical patent/WO2018061185A1/fr

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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
    • F25B39/00—Evaporators; Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/02—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the heat-exchange media travelling at an angle to one another
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning

Definitions

  • the present invention relates to a refrigeration cycle apparatus, and more particularly to a refrigeration cycle apparatus including a water heat exchanger that performs heat exchange between a refrigerant and water.
  • water heat exchangers that warm water or cool water by exchanging heat between refrigerant and water.
  • a water heat exchanger using a plate plate is known as the water heat exchanger.
  • the refrigerant passage and the water passage are arranged via a plate plate.
  • the number of plate plates is increased.
  • JP2013-142485A Patent No. 5411304
  • the water heat exchanger when used as a condenser, the pressure loss of the refrigerant becomes smaller than the pressure loss of the refrigerant when used as an evaporator, and the refrigerant flow rate is lowered. For this reason, the water heat exchanger is required to increase the flow rate of the refrigerant while increasing the heat transfer area.
  • the water heat exchanger is required to increase the heat transfer area and increase the flow rate of the refrigerant.
  • the present invention has been made as part of such development, and an object of the present invention is to provide a refrigeration cycle apparatus capable of increasing the flow rate of refrigerant when the water heat exchanger is operated as a condenser. is there.
  • the refrigeration cycle apparatus includes a first refrigerant passage, a second refrigerant passage, a third refrigerant passage, and a fourth refrigerant passage that are formed by a plurality of laminated plate plates and extend in a direction in which the plurality of plate plates are laminated.
  • a water heat exchanger having a plurality of refrigerant passages is included.
  • the plurality of refrigerant passages are connected in series in the order of the first refrigerant passage, the second refrigerant passage, the third refrigerant passage, and the fourth refrigerant passage, and the refrigerant flows through the plurality of refrigerant passages.
  • the direction in which the refrigerant flows through the first refrigerant path and the third refrigerant path is opposite to the direction in which the refrigerant flows through the second refrigerant path and the fourth refrigerant path.
  • the first refrigerant passage, the second refrigerant passage, the third refrigerant passage, and the fourth refrigerant passage are connected in series in this order, and the first refrigerant passage and the third refrigerant passage are connected to each other. Since the direction of the flowing refrigerant and the direction of the refrigerant flowing through the second refrigerant path and the fourth refrigerant path are reversed, it is possible to suppress a decrease in the flow rate of the refrigerant flowing through the water heat exchanger, Exchange performance can be improved.
  • FIG. 3 is a diagram showing a refrigerant circuit of the refrigeration cycle apparatus according to Embodiment 1.
  • FIG. 1 it is a disassembled perspective view which shows the basic composition of the 1st heat exchanger in a refrigerating-cycle apparatus.
  • Embodiment 1 it is a figure which shows the flow of the refrigerant
  • it is a disassembled perspective view which shows the flow of the refrigerant
  • FIG. 1 shows the refrigerant circuit of the refrigerating-cycle apparatus which concerns on a comparative example. It is a disassembled perspective view which shows the flow of the refrigerant
  • Embodiment 1 it is an exploded perspective view which shows an example of the actual structure of the 1st heat exchanger in a refrigerating-cycle apparatus.
  • Embodiment 1 it is a graph which shows the relationship between a COP ratio and the number ratio of the plate plate in a 1st heat exchanger in the case of using a 1st heat exchanger as a condenser.
  • 6 is a diagram illustrating a refrigerant circuit of a refrigeration cycle apparatus according to Embodiment 2.
  • FIG. 2 it is an exploded perspective view which shows the basic composition of the 1st heat exchanger in a refrigerating-cycle apparatus.
  • Embodiment 2 it is a figure which shows the flow of the refrigerant
  • Embodiment 2 it is a disassembled perspective view which shows the flow of the refrigerant
  • Embodiment 1 FIG. First, the whole structure of the refrigerating cycle apparatus provided with the water heat exchanger is demonstrated.
  • the refrigeration cycle apparatus 1 includes a compressor 3, a first heat exchanger 5 as a water heat exchanger, a second heat exchanger 7, and an expansion valve 9.
  • the first heat exchanger 5 is used as a condenser
  • the discharge side of the compressor 3 and the first heat exchanger 5 are connected by the refrigerant pipe 41.
  • the first heat exchanger 5 and the expansion valve 9 are connected by a refrigerant pipe 42.
  • the expansion valve 9 and the second heat exchanger 7 are connected by a refrigerant pipe 43.
  • the second heat exchanger 7 and the suction side of the compressor 3 are connected by a refrigerant pipe 44.
  • the first heat exchanger 5 includes a first water heat exchange unit 21 and a second water heat exchange unit 22.
  • a plurality of plate plates 65, 66, 62 are arranged in the first water heat exchange unit 21 at intervals.
  • a plurality of plate plates 61, 63, 64 are arranged in the second water heat exchange unit 22 at intervals.
  • Each of the plate plates 65, 66, 61, 63, 64 has three openings 71 through which refrigerant or water flows at the first end and the second end in the longitudinal direction.
  • One opening 71 through which refrigerant or water flows is formed at each of the first end and the second end in the direction.
  • a seal member 73 is provided at a predetermined position between the plate plates 61 to 65 facing each other.
  • the seal member 73 is sandwiched between the opposing plate plates, the coolant passage formed by the opening 71 and the water passage are partitioned.
  • FIG. 4 shows a state where the plate plate and the plate plate are slightly separated for convenience of explanation.
  • first refrigerant passage 24 first refrigerant passage
  • second water passage 29 second water passage
  • a second refrigerant passage 25 (second refrigerant passage) that is a passage through which the refrigerant flows is formed.
  • the portion 71 is formed as a third refrigerant passage 26 (third refrigerant passage) that is a passage through which the refrigerant flows, and is formed at each of the second end portions in the longitudinal direction of the stacked plate plates 61, 63, 64.
  • one opening 71 located on the rightmost side is formed as a fourth refrigerant passage 27 (fourth refrigerant passage) that is a passage through which the refrigerant flows. Note that the first end is positioned above the second end in the direction of gravity.
  • the refrigerant pipe 41 is connected to the first refrigerant passage 24, and the refrigerant pipe 42 is connected to the fourth refrigerant passage 27.
  • a water pipe 58 which is a pipe through which water flows, is connected to the first water path 28, and a water pipe 59, which is a pipe through which water flows, is connected to the second water path 29.
  • a refrigerant passage 33 (a first passage through which the refrigerant that has flowed through the first refrigerant passage 24 flows to the second refrigerant passage 25 in the space sandwiched between the plate plate 65 and the plate plate 66. 5 refrigerant passages) are formed, and in a space sandwiched between the plate plate 66 and the plate plate 62, a water passage 53 for flowing water flowing through the first water passage 28 to the second water passage 29 is formed. .
  • a refrigerant passage 36 (sixth refrigerant) that flows the refrigerant that has flowed through the third refrigerant passage 26 to the fourth refrigerant passage 27 in the space between the plate plate 63 and the plate plate 64.
  • a water passage 52 through which the water flowing through the first water passage 28 flows to the second water passage 29 is formed.
  • the water that has flowed through the first water passage 28 is second water.
  • a water passage 55 that flows to the passage 29 is formed.
  • the first heat exchanger 5 is also provided with a bypass passage 31 that connects the second refrigerant passage 25 and the third refrigerant passage 26 and allows the refrigerant that has flowed in from the second refrigerant passage 25 to flow to the third refrigerant passage 26. ing.
  • a plurality of plate plates 65 and 66 are alternately stacked between the plate plate 66 and the plate plate 62 in the first water heat exchange unit 21.
  • a plurality of plate plates 63 and plate plates 64 are alternately stacked between the plate plate 61 and the plate plate 63.
  • a plurality of refrigerant passages 33 and water passages 53 are alternately arranged according to the number of plate plates 65 and plate plates 66.
  • a plurality of refrigerant passages 36 and water passages 52 are alternately arranged according to the number of plate plates 63 and plate plates 64.
  • the refrigerant flows according to solid arrows.
  • the discharged high-temperature and high-pressure gas refrigerant (single phase) flows through the refrigerant pipe 41 and flows into the first heat exchanger 5 as a water heat exchanger.
  • the 1st heat exchanger 5 heat exchange is performed between the gas refrigerant which flowed in, and the sent water, and a high temperature / high pressure gas refrigerant condenses and turns into a low temperature / high pressure liquid refrigerant (single phase).
  • the water flowing into the first heat exchanger 5 from the water pipe 58 and flowing into the water pipe 59 is warmed.
  • the refrigerant flow in the first heat exchanger 5 will be described in detail later.
  • the high-pressure liquid refrigerant sent out from the first heat exchanger 5 flows through the refrigerant pipe 42 and then becomes a two-phase refrigerant of low-pressure gas refrigerant and liquid refrigerant by the expansion valve 9.
  • the refrigerant in the two-phase state flows through the refrigerant pipe 43 and flows into the second heat exchanger 7.
  • heat exchange is performed between the flowing two-phase refrigerant and, for example, air, and the two-phase refrigerant evaporates the liquid refrigerant so that the low-pressure gas refrigerant (single Phase).
  • the low-pressure gas refrigerant sent out from the second heat exchanger 7 flows through the refrigerant pipe 44 and reaches the compressor 3, is compressed to become a high-temperature and high-pressure gas refrigerant, and is discharged from the compressor 3 again. Thereafter, this cycle is repeated.
  • the refrigerant flows through the first water heat exchange unit 21 and the second water heat exchange unit 22 in series.
  • the refrigerant first flows through the first water heat exchange unit 21 and then flows through the second water heat exchange unit 22.
  • the refrigerant discharged from the compressor 3 flows through the refrigerant pipe 41 (four-way valve 11) and reaches the first refrigerant passage 24.
  • the refrigerant R that has flowed through the first refrigerant passage 24 flows from the top to the bottom in the direction of gravity through the refrigerant passage 33 of the first water heat exchanger 21.
  • the refrigerant R that has flowed through the refrigerant passage 33 reaches the second refrigerant passage 25.
  • the refrigerant R that has flowed through the second refrigerant passage 25 flows through the bypass passage 31 and reaches the third refrigerant passage 26.
  • the refrigerant R that has flowed through the third refrigerant passage 26 flows through the refrigerant passage 36 of the second water heat exchanger 22 from the top to the bottom in the direction of gravity.
  • the refrigerant R that has flowed through the refrigerant passage 36 reaches the fourth refrigerant passage 27.
  • the refrigerant R that has flowed through the fourth refrigerant passage 27 is sent out of the first heat exchanger 5.
  • water flows in parallel through the first water heat exchange unit 21 or the second water heat exchange unit 22.
  • the water flowing through the water passage 58 reaches the first water passage 28.
  • the water W that has flowed through the first water passage 28 flows into the water passage 53 of the first water heat exchange section 21, the water passage 52 of the second water heat exchange section 22, the first water heat exchange section 21, and the second water heat exchange section. 22 water passages 55 flow in parallel.
  • Heat exchange is performed between the water W flowing through the water passage 55 and the refrigerant R flowing through the refrigerant passage 33, so that the water W is warmed.
  • Heat exchange is performed between the water W flowing through the water passage 52 and the refrigerant R flowing through the refrigerant passage 36, and the water W is warmed.
  • the warmed water W is sent out of the first heat exchanger 5. In the first heat exchanger 5, this operation will be repeated hereinafter.
  • coolant flows through the 1st water heat exchange part 21 and the 2nd water heat exchange part 22 in series, and can aim at the improvement of a heat transfer rate. . This will be described in comparison with the refrigeration cycle apparatus according to the comparative example.
  • the refrigeration cycle apparatus 101 includes a compressor 103, a first heat exchanger 105 as a water heat exchanger, a second heat exchanger 107, and an expansion valve 109.
  • the first heat exchanger 105 is used as a condenser
  • the discharge side of the compressor 103 and the first heat exchanger 105 are connected by the refrigerant flow path 141.
  • the first heat exchanger 105 and the expansion valve 109 are connected by a refrigerant flow path 142.
  • the expansion valve 109 and the second heat exchanger 107 are connected by a refrigerant channel 143.
  • the second heat exchanger 107 and the suction side of the compressor 103 are connected by a refrigerant flow path 144.
  • a plurality of plate plates 160, 161, 162, 163, 164, 165 are laminated.
  • a water passage 151 for flowing water flowing from the first water passage 128 to the second water passage 129 is disposed.
  • a refrigerant passage 131 that allows the refrigerant flowing from the first refrigerant passage 124 to flow to the second refrigerant passage 125 is disposed.
  • a water passage 152 for flowing water flowing from the first water passage 128 to the second water passage 129 is disposed in a space sandwiched between the plate plate 162 and the plate plate 163.
  • a refrigerant passage 132 for flowing the refrigerant flowing in from the first refrigerant passage 124 to the second refrigerant passage 125 is disposed in a space sandwiched between the plate plate 164 and the plate plate 165.
  • a water passage 153 for flowing water flowing from the first water passage 128 to the second water passage 129 is disposed.
  • the first heat exchanger 105 is operated as a condenser. This operation is the same as that of the refrigeration cycle apparatus 1 described above.
  • the refrigerant discharged from the compressor 103 sequentially flows through the first heat exchanger 105, the expansion valve 109, and the second heat exchanger 107 as a water heat exchanger, and returns to the compressor 103.
  • the first heat exchanger 105 heat exchange is performed between the flowing refrigerant (gas refrigerant) and the fed water, and the high-temperature and high-pressure gas refrigerant is condensed to become a high-pressure liquid refrigerant.
  • the refrigerant sent from the compressor 103 flows through the refrigerant flow path 141 and reaches the first refrigerant path 124.
  • the refrigerant that has flowed through the first refrigerant passage 124 flows in parallel through the refrigerant passage 131 or the refrigerant passage 132.
  • the refrigerant that has flowed through the refrigerant passage 131 or the refrigerant passage 132 reaches the second refrigerant passage 125.
  • the refrigerant R that has flowed through the second refrigerant passage 125 is sent out of the first heat exchanger 105.
  • the water flowing through the water passage 158 reaches the first water passage 128.
  • the water flowing through the first water passage 128 flows in parallel through the water passage 151, the water passage 152, or the water passage 153.
  • the refrigerant flows through the refrigerant passages 131 and 132 and the water flows through the water passages 151, 152, and 153, heat exchange is performed to warm the water.
  • the warmed water reaches the second water passage 129.
  • the water flowing through the second water passage 129 is sent out of the first heat exchanger 105.
  • the pressure loss of the refrigerant is smaller than the pressure loss of the refrigerant when the water heat exchanger is used as an evaporator, and the refrigerant flow rate is reduced. Will be reduced.
  • the refrigerant sent to the first heat exchanger 105 flows through the refrigerant passage 131 and the refrigerant passage 132 in parallel. For this reason, there is a limit to increasing the flow rate of the refrigerant.
  • the refrigerant flows in parallel through the refrigerant passages 131 and 132, whereas in the first heat exchanger 5 of the refrigeration cycle apparatus 1 according to Embodiment 1, the refrigerant is the refrigerant passage 33. , 36 in series.
  • the refrigerant first flows through the refrigerant passage 33 of the first water heat exchange unit 21 and then flows through the refrigerant passage 36 of the second water heat exchange unit 22.
  • coolant can be raised about twice. As a result, the heat transfer performance is improved and the heat transfer rate can be improved.
  • FIG. 2 shows the basic configuration of the first water heat exchange unit 21 and the second water heat exchange unit 22, but the actual first heat exchanger 5 has the first water heat exchange unit.
  • 21 includes a predetermined number of plate plates 65 and the like
  • the second water heat exchanger 22 also includes a predetermined number of plate plates 63 and the like.
  • a plurality of refrigerant passages 33 and water passages 53 are alternately arranged according to the number of plate plates 65 and the like.
  • a plurality of refrigerant passages 36 and water passages 52 are alternately arranged according to the number of plate plates 63 and the like.
  • FIG. 7 An example of such a first heat exchanger 5 is shown in FIG.
  • the 1st water heat exchange part 21 of the 1st heat exchanger 5 shown by FIG. 7 shown by FIG. 7 several 1st water heat exchange part 21a which has the 1st 1st water heat exchange part 21 shown by FIG. 2 as a basic unit, 21b etc. are arranged.
  • the 2nd water heat exchange part 22 of the 1st heat exchanger 5 several 2nd water heat exchange part 22a, 22b etc. which have one 2nd water heat exchange part 22 shown by FIG. Has been placed.
  • the refrigerant flows through the first water heat exchange unit 21 and the second water heat exchange unit 22 in series as described above.
  • the refrigerant that has flowed through the first refrigerant passage 24 flows through the respective refrigerant passages 33 such as the first water heat exchange portions 21a and 21b, and then flows through the bypass passage 31 and then the second water heat exchange portions 22a and 22b. Etc., each refrigerant passage 36 flows.
  • the water flowing through the first water passage 28 flows in parallel through the respective water passages 53 such as the first water heat exchange portions 21a and 21b and the respective water passages 52 such as the second water heat exchange portions 22a and 22b.
  • Heat exchange is performed between the water flowing through the water passage 53 and the refrigerant flowing through the refrigerant passage 33 to warm the water.
  • heat is exchanged between the water flowing through the water passage 52 and the refrigerant flowing through the refrigerant passage 36 to warm the water.
  • the warmed water is sent out of the first heat exchanger 5 from the second water passage 29.
  • the number (number A) of plate plates 65 and the like arranged in the first water heat exchange unit 21 and the number (number B) of plate plates 63 and the like arranged in the second water heat exchange unit 22 are: It is not necessary that the number is the same, and the number may be different. By making the number A and the number B different, the performance when used as a condenser can be improved.
  • the graph is shown in FIG.
  • the horizontal axis represents the ratio of the number A to the total number (constant) of the number A and the number B.
  • the coefficient of performance COP ratio is increased and the performance is improved by increasing the number of plates 65 and the like of the first water heat exchange section 21 in which the refrigerant flows first with respect to the total number. It has been found.
  • Embodiment 2 when the first heat exchanger is used as a condenser, the refrigerant flows through the first heat exchanger in series, and when the first heat exchanger is used as an evaporator, the refrigerant flows in parallel.
  • a refrigeration cycle apparatus including a first heat exchanger will be described.
  • the basic configuration of the refrigerant circuit of the refrigeration cycle apparatus according to the present embodiment is the same as that of the refrigeration cycle apparatus according to Embodiment 1, but the refrigerant of the refrigeration cycle apparatus according to Embodiment 1.
  • a four-way valve 11, a first electromagnetic valve 13 (first on-off valve), a second electromagnetic valve 15 (second on-off valve), a check valve 17, and a refrigerant pipe 39 are further provided.
  • the same or equivalent components as those of the first embodiment are the same as those of the refrigeration cycle apparatus 1 shown in FIG. 1, and therefore, the same members are denoted by the same reference numerals and the description thereof is omitted unless necessary. Do not repeat.
  • the first solenoid valve 13 is provided in the bypass passage 31 to control the flow of the refrigerant flowing from the second refrigerant passage 25 to the third refrigerant passage 26.
  • a refrigerant pipe 39 that connects the refrigerant pipe 41 and the third refrigerant passage 26 is disposed.
  • the second solenoid valve 15 is provided in the refrigerant pipe 39 to control the flow of refrigerant flowing from the compressor 3 to the third refrigerant passage 26.
  • a refrigerant passage 38 (seventh refrigerant passage) that connects the fourth refrigerant passage 27 and the second refrigerant passage 25 is formed.
  • a check valve 17 is provided in the refrigerant passage 38. The check valve 17 is provided in the forward direction from the fourth refrigerant passage 27 toward the second refrigerant passage 25.
  • the operation of the first heat exchanger 5 as a condenser will be described as the operation of the refrigeration cycle apparatus described above.
  • the refrigerant flows through the first water heat exchange unit 21 and the second water heat exchange unit 22 in series.
  • the first electromagnetic valve 13 is “open”.
  • the second solenoid valve 15 is “closed”.
  • the refrigerant flows according to the arrow.
  • the refrigerant sent from the compressor 3 flows through the refrigerant pipe 41 and reaches the first refrigerant passage 24.
  • the refrigerant R that has flowed through the first refrigerant passage 24 flows through the refrigerant passage 33 of the first water heat exchanger 21 from the top to the bottom in the direction of gravity.
  • the refrigerant R that has flowed through the refrigerant passage 33 reaches the second refrigerant passage 25.
  • the refrigerant R flowing through the second refrigerant passage 25 flows through the bypass passage 31 (first electromagnetic valve 13) and reaches the third refrigerant passage 26.
  • the refrigerant R that has flowed through the third refrigerant passage 26 flows through the refrigerant passage 36 of the second water heat exchanger 22 from the top to the bottom in the direction of gravity.
  • the refrigerant R that has flowed through the refrigerant passage 36 reaches the fourth refrigerant passage 27.
  • the refrigerant R that has flowed through the fourth refrigerant passage 27 is sent out of the first heat exchanger 5.
  • water flows in parallel through the first water heat exchange unit 21 or the second water heat exchange unit 22.
  • the water flowing through the water passage 58 reaches the first water passage 28.
  • the water W that has flowed through the first water passage 28 flows in parallel through the water passage 53 of the first water heat exchanger 21 and the water passage 52 of the second water heat exchanger 22.
  • Heat exchange is performed between the water W flowing through the water passage 53 and the refrigerant R flowing through the refrigerant passage 33, so that the water W is warmed.
  • Heat exchange is performed between the water W flowing through the water passage 52 and the refrigerant R flowing through the refrigerant passage 36, so that the water W is warmed and reaches the second water passage 29.
  • the water flowing through the second water passage 29 is sent out of the first heat exchanger 5.
  • the refrigerant flows in parallel through the first water heat exchange unit 21 and the second water heat exchange unit 22.
  • the first electromagnetic valve 13 is “closed”.
  • the second solenoid valve 15 is “open”.
  • the refrigerant flows according to the arrow.
  • the high-temperature and high-pressure gaseous refrigerant discharged from the compressor flows into the second heat exchanger 7 through the refrigerant pipe 44 (four-way valve 11).
  • the high-temperature and high-pressure refrigerant is heat-exchanged with air or the like, and is condensed to become a low-temperature and high-pressure liquid refrigerant.
  • the low-temperature and high-pressure liquid refrigerant flows through the refrigerant pipe 43 and reaches the expansion valve 9.
  • the low-temperature and high-pressure liquid refrigerant becomes a two-phase refrigerant consisting of a low-pressure gas refrigerant and a liquid refrigerant by the expansion valve 9.
  • the refrigerant in the two-phase state flows through the refrigerant pipe 42 and flows into the first heat exchanger 5.
  • the refrigerant in the two-phase state evaporates into a low-pressure gas refrigerant (single phase) as the liquid refrigerant evaporates. This heat exchange cools the water.
  • the refrigerant flow in the first heat exchanger 5 will be described in detail later.
  • the low-pressure gas refrigerant sent out from the first heat exchanger 5 flows into the compressor 3, is compressed to become a high-temperature high-pressure gas refrigerant, and is discharged from the compressor 3 again. Thereafter, this cycle is repeated.
  • the refrigerant flows through the first water heat exchange unit 21 and the second water heat exchange unit 22 in parallel.
  • the refrigerant R that has flowed through the fourth refrigerant passage 27 is branched into a refrigerant R that flows through the refrigerant passage 36 and a refrigerant R that flows through the refrigerant passage 38 (the check valve 17).
  • the refrigerant R flowing through the refrigerant passage 38 flows through the refrigerant passage 33 after flowing through the second refrigerant passage 25.
  • the refrigerant R flows in parallel through the refrigerant passage 33 of the first water heat exchange unit 21 and the refrigerant passage 36 of the second water heat exchange unit 22.
  • the refrigerant R that has flowed through the refrigerant passage 33 reaches the first refrigerant passage 24.
  • the refrigerant R that has flowed through the refrigerant passage 36 flows through the third refrigerant passage 26 and the refrigerant pipe 39 (second electromagnetic valve 15), and merges with the refrigerant R that has flowed through the first refrigerant passage 24.
  • the merged refrigerant R is sent out of the first heat exchanger 5.
  • water flows in parallel through the first water heat exchange unit 21 or the second water heat exchange unit 22.
  • the water flowing through the water passage 58 reaches the first water passage 28.
  • the water W that has flowed through the first water passage 28 flows in parallel through the water passage 53 of the first water heat exchanger 21 and the water passage 52 of the second water heat exchanger 22.
  • Heat exchange is performed between the water W flowing through the water passage 53 and the refrigerant R flowing through the refrigerant passage 33, and the water W is cooled. Heat exchange is performed between the water W flowing through the water passage 52 and the refrigerant R flowing through the refrigerant passage 36, thereby cooling the water W. The cooled water W reaches the second water passage 29. The water flowing through the second water passage 29 is sent out of the first heat exchanger 5. In the first heat exchanger 5, this operation will be repeated hereinafter.
  • the refrigerant R flows through the first water heat exchange unit 21 and the second water heat exchange unit 22 in series, The heat transfer rate can be improved.
  • coolant R will flow through the 1st water heat exchange part 21 and the 2nd water heat exchange part 22 in parallel.
  • FIG. 10 Although the basic composition of the 1st water heat exchange part 21 and the 2nd water heat exchange part 22 is shown, in the actual 1st heat exchanger 5, in the 1st water heat exchange part 21, A predetermined number of plate plates 65 and the like are disposed, and a predetermined number of plate plates 63 and the like are also disposed in the second water heat exchange unit 22.
  • a plurality of refrigerant passages 33 and water passages 53 are alternately arranged according to the number of plate plates 65 and the like.
  • a plurality of refrigerant passages 36 and water passages 52 are alternately arranged according to the number of plate plates 63 and the like.
  • FIG. 1st water heat exchange part 21 of the 1st heat exchanger 5 shown by Drawing 15 a plurality of 1st water heat exchange parts 21a which have one 1st water heat exchange part 21 shown in Drawing 10 as a basic unit, 21b etc. are arranged.
  • 2nd water heat exchange part 22 of the 1st heat exchanger 5 several 2nd water heat exchange part 22a, 22b etc. which have one 2nd water heat exchange part 22 shown by FIG. Has been placed.
  • the refrigerant flows through the first water heat exchange unit 21 and the second water heat exchange unit 22 in series as described above.
  • the refrigerant that has flowed through the first refrigerant passage 24 flows through the respective refrigerant passages 33 such as the first water heat exchange portions 21a and 21b, and then flows through the bypass passage 31 and then the second water heat exchange portions 22a and 22b. Etc., each refrigerant passage 36 flows.
  • the water flowing through the first water passage 28 flows in parallel through the respective water passages 53 such as the first water heat exchange portions 21a and 21b and the respective water passages 52 such as the second water heat exchange portions 22a and 22b.
  • Heat exchange is performed between the water flowing through the water passage 53 and the refrigerant flowing through the refrigerant passage 33 to warm the water. Further, heat is exchanged between the water flowing through the water passage 52 and the refrigerant flowing through the refrigerant passage 36 to warm the water.
  • the warmed water is sent out of the first heat exchanger 5 from the second water passage 29.
  • the coefficient of performance COP ratio is increased and the performance is improved by increasing the number of plate plates 65 and the like of the first water heat exchanging portion 21 in which the refrigerant first flows relative to the total number of plate plates 65 and the like. Can be made.
  • the refrigerant flows in parallel through the first water heat exchange unit 21 and the second water heat exchange unit 22 as described above.
  • the refrigerant flowing through the first refrigerant passage 24 flows through the respective refrigerant passages 33 such as the first water heat exchange portions 21a and 21b, and simultaneously flows through the respective refrigerant passages 36 such as the second water heat exchange portions 22a and 22b. It will be.
  • Water also flows in parallel through the first water heat exchanger 21 or the second water heat exchanger 22.
  • the water flowing through the first water passage 28 flows in parallel through the respective water passages 53 such as the first water heat exchange portions 21a and 21b and the respective water passages 52 such as the second water heat exchange portions 22a and 22b.
  • Heat exchange is performed between the water flowing through the water passage 53 and the refrigerant flowing through the refrigerant passage 33 to cool the water.
  • heat is exchanged between the water flowing through the water passage 52 and the refrigerant flowing through the refrigerant passage 36 to cool the water.
  • the cooled water is sent out of the first heat exchanger 5 from the second water passage 29.
  • the COP ratio is 100% regardless of the number ratio.
  • connection portion A where the first refrigerant passage 24 and the refrigerant pipe 41 are connected, and a connection where the second refrigerant passage 25 and the bypass passage 31 are connected.
  • connection portion E connection portion where the first water passage 28 and the water pipe 58 are connected
  • connection portion F connection portion
  • connection part A to the connection part F may be arranged on the first water heat exchange part 21 side.
  • the connection part A to the connection part F By disposing the connection part A to the connection part F on the second water heat exchange part 22 side or the first water heat exchange part 21 side, the assembly of the first heat exchanger 5 can be facilitated.
  • constituent members of the refrigeration cycle apparatus described in each embodiment can be variously combined as necessary.
  • the present invention is effectively used for a refrigeration cycle apparatus equipped with a water heat exchanger.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

L'invention concerne un dispositif à cycle frigorifique (1) comportant un premier échangeur de chaleur (5) muni d'une première unité d'échange de chaleur d'eau (21) et d'une seconde unité d'échange de chaleur d'eau (22), dans lesquelles une pluralité de plaques (65, 66, 63, 64) sont stratifiées. Dans le premier échangeur de chaleur (5), un premier circuit de fluide frigorigène (24), un circuit de fluide frigorigène (33), un deuxième circuit de fluide frigorigène (25), un circuit de dérivation (31), un troisième circuit de fluide frigorigène (26), un circuit de fluide frigorigène (36) et un quatrième circuit de fluide frigorigène (27) sont formés par liaison en série dans cet ordre. Le premier circuit de fluide frigorigène (24) et le deuxième circuit de fluide frigorigène (25) sont formés pour s'étendre dans la direction de stratification dans la première unité d'échange de chaleur d'eau (21) et dans la seconde unité d'échange de chaleur d'eau (22), et le circuit de fluide frigorigène (33) est formé dans la première unité d'échange de chaleur d'eau (21). Le troisième circuit de fluide frigorigène (26) et le quatrième circuit de fluide frigorigène (27) sont formés pour s'étendre dans la direction de stratification dans la seconde unité d'échange de chaleur d'eau (22), et le circuit de fluide frigorigène (36) est formé dans la seconde unité d'échange de chaleur d'eau (22).
PCT/JP2016/079040 2016-09-30 2016-09-30 Dispositif à cycle frigorifique WO2018061185A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2016/079040 WO2018061185A1 (fr) 2016-09-30 2016-09-30 Dispositif à cycle frigorifique
JP2018541836A JP6719570B2 (ja) 2016-09-30 2016-09-30 冷凍サイクル装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/079040 WO2018061185A1 (fr) 2016-09-30 2016-09-30 Dispositif à cycle frigorifique

Publications (1)

Publication Number Publication Date
WO2018061185A1 true WO2018061185A1 (fr) 2018-04-05

Family

ID=61760307

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/079040 WO2018061185A1 (fr) 2016-09-30 2016-09-30 Dispositif à cycle frigorifique

Country Status (2)

Country Link
JP (1) JP6719570B2 (fr)
WO (1) WO2018061185A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020217308A1 (fr) * 2019-04-23 2020-10-29 株式会社日阪製作所 Échangeur à plaques

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000205785A (ja) * 1999-01-14 2000-07-28 Denso Corp 熱交換器
US20150300743A1 (en) * 2012-12-10 2015-10-22 Danfoss Micro Channel Heat Exchange (Jiaxing) Co. Ltd. Plate heat exchanger
JP2016519279A (ja) * 2013-05-16 2016-06-30 マーレ インターナツィオナール ゲーエムベーハー 凝縮器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000205785A (ja) * 1999-01-14 2000-07-28 Denso Corp 熱交換器
US20150300743A1 (en) * 2012-12-10 2015-10-22 Danfoss Micro Channel Heat Exchange (Jiaxing) Co. Ltd. Plate heat exchanger
JP2016519279A (ja) * 2013-05-16 2016-06-30 マーレ インターナツィオナール ゲーエムベーハー 凝縮器

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020217308A1 (fr) * 2019-04-23 2020-10-29 株式会社日阪製作所 Échangeur à plaques
CN113424010A (zh) * 2019-04-23 2021-09-21 株式会社日阪制作所 板式热交换器
CN113424010B (zh) * 2019-04-23 2023-07-18 株式会社日阪制作所 板式热交换器

Also Published As

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JPWO2018061185A1 (ja) 2019-04-04
JP6719570B2 (ja) 2020-07-08

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