WO2020152873A1 - Refrigerant liquefying element, refrigerant liquefier using same, heat exchanger, and refrigeration cycle - Google Patents

Refrigerant liquefying element, refrigerant liquefier using same, heat exchanger, and refrigeration cycle Download PDF

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Publication number
WO2020152873A1
WO2020152873A1 PCT/JP2019/003539 JP2019003539W WO2020152873A1 WO 2020152873 A1 WO2020152873 A1 WO 2020152873A1 JP 2019003539 W JP2019003539 W JP 2019003539W WO 2020152873 A1 WO2020152873 A1 WO 2020152873A1
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Prior art keywords
refrigerant
tube
element body
hole
flow
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PCT/JP2019/003539
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French (fr)
Japanese (ja)
Inventor
篠崎　隆
鈴木　隆
恭智 小川
Original Assignee
株式会社オガワクリーンシステム
篠崎　隆
鈴木　隆
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Application filed by 株式会社オガワクリーンシステム, 篠崎　隆, 鈴木　隆 filed Critical 株式会社オガワクリーンシステム
Priority to PCT/JP2019/003539 priority Critical patent/WO2020152873A1/en
Priority to CN201980030185.1A priority patent/CN112136011B/en
Priority to JP2020537795A priority patent/JP6907427B2/en
Publication of WO2020152873A1 publication Critical patent/WO2020152873A1/en

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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
    • F25B39/04—Condensers
    • 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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F25B40/02—Subcoolers

Definitions

  • the present invention relates to a refrigerant liquefaction element for liquefying a refrigerant, a refrigerant liquefier using the same, a heat exchanger and a refrigeration cycle.
  • a condenser in which a large number of fins are arranged in parallel and a meandering tube is made to penetrate between the fins (see, for example, Patent Document 1).
  • a condenser is used by being incorporated in a refrigeration cycle.
  • a condenser it has been proposed to incorporate a supercooler to improve the efficiency of the refrigeration cycle.
  • the conventional condenser has a problem that the efficiency of the refrigeration cycle is not sufficiently improved. Therefore, the present invention has been made in view of the above circumstances, and provides a refrigerant liquefaction element capable of improving the efficiency of the refrigeration cycle and downsizing, a refrigerant liquefier using the same, a heat exchanger, and a refrigeration cycle. The purpose is to do.
  • the present invention includes a main body, a spiral groove portion provided on an outer peripheral portion of the main body to swirl and flow the refrigerant, and a decompression expansion mechanism provided on an inner peripheral portion of the main body to decompress and expand the refrigerant to flow. Is characterized by.
  • the present invention includes a tube body and a refrigerant liquefaction element inserted in the tube body, the refrigerant liquefaction element is a main body, a spiral groove portion which is provided in an outer peripheral portion of the main body, and causes a refrigerant to swirl and flow, And a decompression expansion mechanism which is provided on an inner peripheral portion of the main body to decompress and expand the refrigerant to flow.
  • the present invention includes a fin, a plurality of tubes, and a refrigerant liquefaction element inserted into the tube on the outlet side, and the refrigerant liquefaction element swirls the refrigerant provided in the main body and the outer peripheral portion of the main body. And a depressurization expansion mechanism that is provided in an inner peripheral portion of the main body to decompress and expand the refrigerant to flow.
  • the refrigerant liquefaction element since the refrigerant liquefaction element has a spiral groove on the outer peripheral portion for swirling and flowing the refrigerant, the flow in the tube on the outlet side becomes a swirl flow, and the heat radiation amount of the fins through the inner wall surface of the tube increases.
  • the decompression/expansion mechanism that decompresses and expands the refrigerant is provided in the inner peripheral portion, the refrigerant is decompressed, the temperature is lowered, and the main body is cooled, and the degree of supercooling of the refrigerant is increased.
  • the refrigerant liquefaction element since the refrigerant liquefaction element has the spiral groove portion on the outer peripheral portion for swirling and flowing the refrigerant, the flow in the tube on the outlet side becomes a swirl flow, and the heat radiation amount of the fin through the tube inner wall surface increases.
  • the decompression/expansion mechanism that decompresses and expands the refrigerant is provided in the inner peripheral portion, the refrigerant is decompressed, the temperature is lowered, and the main body is cooled, and the degree of supercooling of the refrigerant is increased.
  • FIG. 1 is a diagram showing a refrigeration cycle according to one embodiment.
  • FIG. 2 is a diagram showing the structure of the refrigerant liquefier.
  • FIG. 3 is a diagram showing a refrigerant liquefier according to another embodiment.
  • FIG. 4 is a diagram showing a refrigeration cycle according to another embodiment.
  • FIG. 5 is a view showing the structure of the tube on the outlet side of the condenser.
  • FIG. 1 shows a refrigeration cycle.
  • Reference numeral 1 is a compressor, and a fin-and-tube type condenser 2 is connected to a discharge port of the compressor 1.
  • a pressure reducing device 3 is connected to the condenser 2, and a fin-and-tube type evaporator 4 is connected to the pressure reducing device 3.
  • the evaporator 4 is connected to the suction port of the compressor 1.
  • the condenser 2 includes a plurality of (five in the present embodiment) straight tubes 21 to 25 and a plurality of heat radiation fins 27, 27, 27....
  • the tubes 21 to 25 are meandering tubes, and the meandering tubes are composed of an inlet side tube 21, an outlet side tube 25, and central tubes 22 to 24.
  • the tube 21 on the inlet side is connected to the connecting pipe 28.
  • the outlet of the tube 21 is connected to the inlet of the tube 22 via a vent 51, and the outlet of the tube 22 is connected to the inlet of the tube 23 via a vent 52.
  • the outlet of the tube 23 is connected to the inlet of the tube 24 via a vent 53, and the outlet of the tube 24 is connected to the inlet of the tube 25 via a vent 54.
  • the outlet of the tube 25 is connected to the connecting pipe 29.
  • Reference numeral 81 is a condenser fan.
  • a refrigerant liquefier 100 is connected to the condenser 2 via a connecting pipe 29, and a decompression device 3 is connected to the refrigerant liquefying device 100 via a connecting pipe 30.
  • the refrigerant liquefier 100 is connected to the liquid line.
  • the evaporator 4 is connected to the decompression device 3 via a connection pipe 31.
  • the evaporator 4 is provided with a plurality of (five in the present embodiment) straight tubes 41 to 45 and a plurality of heat radiation fins 47, 47, 47.
  • the tubes 41 to 45 are meandering tubes, and the meandering tubes are composed of an inlet side tube 41, an outlet side tube 45, and a plurality of central tubes 42 to 44.
  • the tube 41 on the inlet side is connected to the connecting pipe 31.
  • the outlet of the tube 41 is connected to the inlet of the tube 42 via the vent 61, and the outlet of the tube 42 is connected to the inlet of the tube 43 via the vent 62.
  • the outlet of the tube 43 is connected to the inlet of the tube 44 via the vent 63, and the outlet of the tube 44 is connected to the inlet of the tube 45 via the vent 64.
  • the outlet of the tube 45 is connected to the compressor 1 via the connecting pipe 32.
  • Reference numeral 83 is an evaporator fan.
  • the refrigerant liquefier 100 includes a cylindrical tube body 110, and connecting members 101 and 102 are provided at both ends of the tube body 110.
  • the connector 101 is connected to the connecting pipe 29, and the connector 102 is connected to the connecting pipe 30.
  • a refrigerant liquefying element 105 is integrated with the inner circumference of the tube body 110.
  • the refrigerant liquefying element 105 has a hollow element body 172, and the spiral groove portion 173 for swirling and flowing the refrigerant is provided on the outer peripheral portion of the element body 172.
  • the spiral groove portions 173 are provided from the upstream side to the downstream side at a substantially equal pitch P over almost the entire area of the element body 172.
  • a through hole 179 is formed in the downstream portion of the element body 172 where the spiral groove 173 is not formed.
  • the refrigerant liquefying element 105 is arranged such that the land portion 174 of the element body 172 is in close contact with the inner peripheral surface of the tubular body 110.
  • a spiral groove 173 is formed between the land 174 and the land 174.
  • the spiral groove portion 173 has a rectangular cross section.
  • a decompression expansion mechanism 175 for decompressing and expanding the refrigerant to flow is provided on the inner peripheral portion of the element body 172.
  • the decompression expansion mechanism 175 is a hollow through hole provided in the element body 172.
  • the refrigerant flows in the direction of arrow R.
  • the hollow through hole includes a throttle hole 176 and an expansion hole 177 having an inner diameter larger than that of the throttle hole 176.
  • the hollow through hole has an inlet hole 178 having an inner diameter larger than that of the throttle hole 176.
  • the refrigerant flows in the direction indicated by the arrow R, and the high-temperature and high-pressure gas refrigerant flows into the fin-and-tube type condenser 2.
  • This gas refrigerant is condensed and liquefied by the condenser 2.
  • the liquid refrigerant flowing out from the condenser 2 flows into the refrigerant liquefier 100.
  • the refrigerant liquefaction element 171 is provided in the tube body 110. Since the refrigerant liquefying element 171 includes the spiral groove portion 173 for swirling and flowing the refrigerant in the outer peripheral portion of the element body 172, the flow contacting the inner wall surface of the tubular body 110 is a swirling flow. The swirling flow enters the inner peripheral portion of the element body 172 through the through hole 179, merges with the refrigerant decompressed through the decompression expansion mechanism 175, and flows out from the refrigerant liquefier 100. Since the swirl flow flows in contact with the inner wall surface of the tube body 110, the amount of heat released through the inner wall surface of the tube body 110 increases.
  • the flow of the refrigerant in the spiral groove portion 173 produces a spiral flow (primary flow) from the upstream side to the downstream side in the tubular body 110. Further, the flow of the refrigerant in the spiral groove portion 173 generates a pair of rotational flows (secondary flows) that rotate in opposite directions along the sides from the center within the rectangular cross section of the spiral groove portion 173. As a result, the amount of heat dissipated by the heat dissipating fins 27 through the inner wall surface of the tubular body 110 is increased, the temperature of the refrigerant is lowered, and the degree of supercooling of the refrigerant is increased.
  • a decompression expansion mechanism 175 for decompressing and expanding the refrigerant to flow is provided on the inner peripheral portion of the element body 172. Therefore, the refrigerant is decompressed, the temperature of the refrigerant is lowered, and the element body 172 is cooled and flows, so that the degree of supercooling of the refrigerant is increased.
  • the decompression expansion mechanism 175 is a hollow through hole provided in the element body 172 of the refrigerant liquefying element 171, and this hollow through hole is composed of a throttle hole 176 and an expansion hole 177 having an inner diameter larger than that of the throttle hole 176. Therefore, the refrigerant liquefaction element 171 can be configured with a simple structure.
  • the refrigerant is squeezed by the throttle hole 176 and then expanded by the expansion hole 177, so that the refrigerant is expanded under reduced pressure.
  • the hollow through hole of the decompression/expansion mechanism 175 has an inlet hole 178 having an inner diameter larger than that of the throttle hole 176 upstream.
  • the amount of the refrigerant flowing through the spiral groove portion 173 on the outer peripheral side of the element body 172 and the amount of the refrigerant flowing through the decompression/expansion mechanism 175 on the inner peripheral side of the element body 172 have a ratio of 2:1.
  • D1 is the inner diameter of the throttle hole 176
  • D2 is the inner diameter of the expansion hole 177
  • D3 is the inner diameter of the inlet hole 178.
  • the refrigerant that has passed through the refrigerant liquefier 100 is decompressed by the decompression device 3 and flows into the fin-and-tube type evaporator 4.
  • the liquid refrigerant flowing into the evaporator 4 is gasified by the evaporator 4, and this gas refrigerant is sucked into the suction port of the compressor 1.
  • a through hole 179 is formed in the element body 172.
  • the through hole 179 is a hole for joining the spiral flow refrigerant flowing in the outer peripheral portion of the element body 172 and the refrigerant decompressed by flowing in the decompression expansion mechanism 175.
  • the configuration is not limited to this.
  • the element body 172 may be formed to have a short length, and a merging portion 180 for merging the spiral flow refrigerant and the depressurized refrigerant may be provided on the downstream side of the element body 172.
  • FIG. 4 shows another embodiment.
  • the condenser 2 includes a plurality of (five in the present embodiment) straight tubes 21 to 25 and a plurality of heat radiation fins 27, 27, 27....
  • the tubes 21 to 25 are meandering tubes, and the meandering tubes are composed of an inlet side tube 21, an outlet side tube 25, and central tubes 22 to 24.
  • the tube 21 on the inlet side is connected to the connecting pipe 28.
  • the outlet of the tube 21 is connected to the inlet of the tube 22 via a vent 51, and the outlet of the tube 22 is connected to the inlet of the tube 23 via a vent 52.
  • the outlet of the tube 23 is connected to the inlet of the tube 24 via a vent 53, and the outlet of the tube 24 is connected to the inlet of the tube 25 via a vent 54.
  • the outlet of the tube 25 is connected to the connecting pipe 29.
  • the pressure reducing device 3 is connected to the connecting pipe 29, and the fin-and-tube type evaporator 4 is connected to the pressure reducing device 3.
  • a refrigerant liquefaction element (supercooler) 71 is arranged in the tube 25 on the outlet side of the condenser 2.
  • the refrigerant liquefaction element 71 is arranged on the inlet side of the linearly formed outlet side tube 25.
  • the length of the refrigerant liquefying element 71 is arbitrary, it is preferably half or less of the length of the tube 25 in consideration of the flow path resistance in the tube.
  • the refrigerant liquefying element 71 has a hollow element body 72, and a spiral groove portion 73 for swirling and flowing the refrigerant is provided on the outer peripheral portion of the element body 72.
  • the refrigerant liquefaction element 71 is arranged such that the land portion 74 of the element body 72 is in close contact with the inner peripheral surface of the tube 25.
  • a spiral groove portion 73 is formed between the land portion 74 of the element body 72 and the land portion 74.
  • the spiral groove portion 73 has a rectangular cross section. Is.
  • a decompression expansion mechanism 75 for decompressing and expanding the refrigerant to flow is provided on the inner peripheral portion of the element body 72.
  • the decompression expansion mechanism 75 is a hollow through hole provided in the element body 72 of the refrigerant liquefying element 71.
  • the refrigerant flows in the direction indicated by arrow R.
  • the hollow through hole includes a throttle hole 76 and an expansion hole 77 having an inner diameter larger than that of the throttle hole 76.
  • the hollow through hole has an inlet hole 78 having an inner diameter larger than that of the throttle hole 76.
  • the refrigerant flows in the direction indicated by the arrow R, and the high-temperature and high-pressure gas refrigerant flows into the fin-and-tube type condenser 2.
  • This gas refrigerant is condensed and liquefied by the condenser 2.
  • the liquid refrigerant flowing out of the condenser 2 flows into the pressure reducing device 3, is reduced in pressure by the pressure reducing device 3, and flows into the fin-and-tube type evaporator 4.
  • the liquid refrigerant flowing into the evaporator 4 is gasified by the evaporator 4, and this gas refrigerant is sucked into the suction port of the compressor 1.
  • the refrigerant liquefaction element 71 is provided in the tube 25 on the outlet side, and the refrigerant liquefaction element 71 has the spiral groove portion 73 for swirling and flowing the refrigerant around the outer periphery of the element body 72.
  • the flow inside the tube 25 becomes a swirl flow, and the heat radiation amount of the radiation fin 27 through the inner wall surface of the tube 25 increases.
  • the flow of the refrigerant in the tube 25 is the same as the spiral flow (primary flow) flowing from the upstream to the downstream in the tube 25, and along the sides from the center in the rectangular cross section of the spiral groove portion 73.
  • a pair of rotational flows (secondary flows) that rotate in opposite directions are generated, whereby the heat radiation amount of the heat radiation fins 27 through the inner wall surface of the tube 25 increases, the temperature of the refrigerant becomes low, and the degree of supercooling of the refrigerant advances.
  • a decompression expansion mechanism 75 for decompressing and expanding the refrigerant to flow is provided on the inner peripheral portion of the element body 72. Therefore, the refrigerant is decompressed by the decompression/expansion mechanism 75, the temperature is lowered, the element body 72 is cooled, and the degree of supercooling of the refrigerant is increased.
  • the hollow through hole of the decompression/expansion mechanism 75 has an inlet hole 78 having an inner diameter larger than that of the throttle hole 76 upstream.
  • the spiral groove portion 73 on the outer peripheral side of the element main body 72 is adjusted.
  • the amount of refrigerant flowing and the amount of refrigerant flowing through the decompression expansion mechanism 75 on the inner peripheral side of the element body 72 can be adjusted. By this adjustment, the degree of supercooling can be changed.
  • the amount of refrigerant flowing through the spiral groove 73 on the outer peripheral side of the element body 72 and the amount of refrigerant flowing through the decompression/expansion mechanism 75 on the inner peripheral side of the element body 72 are set to a ratio of 2:1. .. D1 is the inner diameter of the throttle hole 76, D2 is the inner diameter of the expansion hole 77, and D3 is the inner diameter of the inlet hole 78.
  • the present invention has been described above based on the embodiments, the present invention is not limited to these embodiments.
  • the element body 72 in the tube 25 is arranged with the inlet hole 78 facing upstream, but it may be arranged in a reverse assembly with the inlet hole 78 facing downstream.
  • the refrigerant flows in the direction opposite to the arrow R.
  • the refrigerant having entered the expansion hole 77 is decompressed by the throttle hole 76 and expanded by the inlet hole 78. Since the flow in the tube 25 becomes a swirl flow in the spiral groove portion 73, the amount of heat released through the inner wall surface of the tube 25 increases.
  • the refrigerant having entered the expansion hole 77 is decompressed by the throttle hole 76 and expanded and flows at the inlet hole 78, so that the refrigerant is decompressed, the temperature is lowered, and the element body 72 is cooled. Will proceed.

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

Abstract

The purpose of the present invention is to provide a refrigerant liquefying element, a heat exchanger, and a refrigeration cycle with which improvement in the efficiency of the refrigeration cycle and size reduction can be achieved. This refrigerant liquefying element 105 inserted into a pipe body 110 is provided with: an element body 172; a spiral groove part 173 which is provided on the outer peripheral section of the element body 172 and through which a refrigerant swirls and flows; and a depressurizing and expanding mechanism 175 that is provided on the inner peripheral section of the element body 172 and depressurizes and expands the refrigerant.

Description

冷媒液化素子、それを用いた冷媒液化器、熱交換器および冷凍サイクルRefrigerant liquefaction element, refrigerant liquefier using the same, heat exchanger and refrigeration cycle
　本発明は、冷媒を液化させる冷媒液化素子、それを用いた冷媒液化器、熱交換器および冷凍サイクルに関する。 The present invention relates to a refrigerant liquefaction element for liquefying a refrigerant, a refrigerant liquefier using the same, a heat exchanger and a refrigeration cycle.
　従来、多数枚のフィンを平行に並べて、これらフィン間に蛇行式のチューブを貫通させて構成した、いわゆるフィンアンドチューブ形の凝縮器が知られている（例えば、特許文献１参照）。
　一般に、凝縮器は、冷凍サイクルに組み込まれて使用される。
　例えば凝縮器にあっては、過冷却器を組み込んで、冷凍サイクルの効率を向上させたものが提案されている。 BACKGROUND ART Conventionally, there is known a so-called fin-and-tube type condenser in which a large number of fins are arranged in parallel and a meandering tube is made to penetrate between the fins (see, for example, Patent Document 1).
Generally, a condenser is used by being incorporated in a refrigeration cycle.
For example, as a condenser, it has been proposed to incorporate a supercooler to improve the efficiency of the refrigeration cycle.
特開２０１５−１３１７号公報JP, 2005-1317, A
　しかしながら、従来の凝縮器にあっては、冷凍サイクルの効率の向上が十分に図れていない、という課題があった。
　そこで、本発明は、上述した事情に鑑みてなされたものであり、冷凍サイクルの効率の向上と、小型化が図れる冷媒液化素子、それを用いた冷媒液化器、熱交換器および冷凍サイクルを提供することを目的とする。 However, the conventional condenser has a problem that the efficiency of the refrigeration cycle is not sufficiently improved.
Therefore, the present invention has been made in view of the above circumstances, and provides a refrigerant liquefaction element capable of improving the efficiency of the refrigeration cycle and downsizing, a refrigerant liquefier using the same, a heat exchanger, and a refrigeration cycle. The purpose is to do.
　本発明は、本体と、前記本体の外周部に設けられ冷媒を旋回させて流す螺旋溝部と、前記本体の内周部に設けられ冷媒を減圧膨張させて流す減圧膨張機構と、を備える、ことを特徴とする。 The present invention includes a main body, a spiral groove portion provided on an outer peripheral portion of the main body to swirl and flow the refrigerant, and a decompression expansion mechanism provided on an inner peripheral portion of the main body to decompress and expand the refrigerant to flow. Is characterized by.
　本発明は、管体と、管体に挿入された冷媒液化素子と、を備え、前記冷媒液化素子は、本体と、前記本体の外周部に設けられ冷媒を旋回させて流す螺旋溝部と、前記本体の内周部に設けられ冷媒を減圧膨張させて流す減圧膨張機構と、を備えることを特徴とする。
　また、本発明は、フィンと、複数のチューブと、出口側のチューブに挿入される冷媒液化素子と、を備え、この冷媒液化素子は、本体と、前記本体の外周部に設けられ冷媒を旋回させて流す螺旋溝部と、前記本体の内周部に設けられ冷媒を減圧膨張させて流す減圧膨張機構と、を備える、ことを特徴とする。 The present invention includes a tube body and a refrigerant liquefaction element inserted in the tube body, the refrigerant liquefaction element is a main body, a spiral groove portion which is provided in an outer peripheral portion of the main body, and causes a refrigerant to swirl and flow, And a decompression expansion mechanism which is provided on an inner peripheral portion of the main body to decompress and expand the refrigerant to flow.
Further, the present invention includes a fin, a plurality of tubes, and a refrigerant liquefaction element inserted into the tube on the outlet side, and the refrigerant liquefaction element swirls the refrigerant provided in the main body and the outer peripheral portion of the main body. And a depressurization expansion mechanism that is provided in an inner peripheral portion of the main body to decompress and expand the refrigerant to flow.
　これら本発明では、冷媒液化素子が外周部に冷媒を旋回させて流す螺旋溝部を備えるため、出口側のチューブ内の流れは旋回流となり、チューブ内壁面を通じた、フィンの放熱量が増す。また、内周部に冷媒を減圧膨張させて流す減圧膨張機構を備えたため、冷媒が減圧されて、低温化し本体が冷却され、冷媒の過冷却度が進む。 In these inventions, since the refrigerant liquefaction element has a spiral groove on the outer peripheral portion for swirling and flowing the refrigerant, the flow in the tube on the outlet side becomes a swirl flow, and the heat radiation amount of the fins through the inner wall surface of the tube increases. In addition, since the decompression/expansion mechanism that decompresses and expands the refrigerant is provided in the inner peripheral portion, the refrigerant is decompressed, the temperature is lowered, and the main body is cooled, and the degree of supercooling of the refrigerant is increased.
　本発明では、冷媒液化素子が外周部に冷媒を旋回させて流す螺旋溝部を備えるため、出口側のチューブ内の流れは旋回流となり、チューブ内壁面を通じた、フィンの放熱量が増す。また、内周部に冷媒を減圧膨張させて流す減圧膨張機構を備えたため、冷媒が減圧されて、低温化し本体が冷却され、冷媒の過冷却度が進む。 In the present invention, since the refrigerant liquefaction element has the spiral groove portion on the outer peripheral portion for swirling and flowing the refrigerant, the flow in the tube on the outlet side becomes a swirl flow, and the heat radiation amount of the fin through the tube inner wall surface increases. In addition, since the decompression/expansion mechanism that decompresses and expands the refrigerant is provided in the inner peripheral portion, the refrigerant is decompressed, the temperature is lowered, and the main body is cooled, and the degree of supercooling of the refrigerant is increased.
図１は一実施形態による冷凍サイクルを示す図である。FIG. 1 is a diagram showing a refrigeration cycle according to one embodiment. 図２は冷媒液化器の構造を示す図である。FIG. 2 is a diagram showing the structure of the refrigerant liquefier. 図３は別実施形態による冷媒液化器を示す図である。FIG. 3 is a diagram showing a refrigerant liquefier according to another embodiment. 図４は別実施形態による冷凍サイクルを示す図である。FIG. 4 is a diagram showing a refrigeration cycle according to another embodiment. 図５は凝縮器の出口側のチューブの構造を示す図である。FIG. 5 is a view showing the structure of the tube on the outlet side of the condenser.
　図１は、冷凍サイクルを示す。
　符号１は圧縮機であり、圧縮機１の吐出口にはフィンアンドチューブ形の凝縮器２が接続されている。この凝縮器２には減圧装置３が接続され、減圧装置３にはフィンアンドチューブ形の蒸発器４が接続されている。
　この蒸発器４は圧縮機１の吸込み口に接続されている。 FIG. 1 shows a refrigeration cycle.
Reference numeral 1 is a compressor, and a fin-and-tube type condenser 2 is connected to a discharge port of the compressor 1. A pressure reducing device 3 is connected to the condenser 2, and a fin-and-tube type evaporator 4 is connected to the pressure reducing device 3.
The evaporator 4 is connected to the suction port of the compressor 1.
　凝縮器２は、複数本（本実施形態では５本）の真直なチューブ２１~２５と、複数枚の放熱フィン２７、２７、２７…とを備えている。チューブ２１~２５は、蛇行式のチューブであり、この蛇行式のチューブは入口側のチューブ２１と出口側のチューブ２５と中央部のチューブ２２~２４とで構成される。入口側のチューブ２１は接続管２８に連結されている。チューブ２１の出口はベント５１を介してチューブ２２の入口に接続され、チューブ２２の出口はベント５２を介してチューブ２３の入口に接続されている。チューブ２３の出口はベント５３を介してチューブ２４の入口に接続され、チューブ２４の出口はベント５４を介してチューブ２５の入口に接続されている。チューブ２５の出口は接続管２９に連結されている。
　符号８１は、凝縮器用ファンである。 The condenser 2 includes a plurality of (five in the present embodiment) straight tubes 21 to 25 and a plurality of heat radiation fins 27, 27, 27.... The tubes 21 to 25 are meandering tubes, and the meandering tubes are composed of an inlet side tube 21, an outlet side tube 25, and central tubes 22 to 24. The tube 21 on the inlet side is connected to the connecting pipe 28. The outlet of the tube 21 is connected to the inlet of the tube 22 via a vent 51, and the outlet of the tube 22 is connected to the inlet of the tube 23 via a vent 52. The outlet of the tube 23 is connected to the inlet of the tube 24 via a vent 53, and the outlet of the tube 24 is connected to the inlet of the tube 25 via a vent 54. The outlet of the tube 25 is connected to the connecting pipe 29.
Reference numeral 81 is a condenser fan.
　凝縮器２には接続管２９を介して冷媒液化器１００が接続され、冷媒液化器１００には接続管３０を介して減圧装置３が接続されている。冷媒液化器１００は液ラインに接続されている。減圧装置３には接続管３１を介して蒸発器４が接続されている。
　蒸発器４は、複数本（本実施形態では５本）の真直なチューブ４１~４５と、複数枚の放熱フィン４７、４７、４７…とを備えている。チューブ４１~４５は、蛇行式のチューブであり、この蛇行式のチューブは入口側のチューブ４１と出口側のチューブ４５と中央部の複数のチューブ４２~４４とで構成される。入口側のチューブ４１は接続管３１に連結されている。チューブ４１の出口はベント６１を介してチューブ４２の入口に接続され、チューブ４２の出口はベント６２を介してチューブ４３の入口に接続されている。チューブ４３の出口はベント６３を介してチューブ４４の入口に接続され、チューブ４４の出口はベント６４を介してチューブ４５の入口に接続されている。チューブ４５の出口は接続管３２を介して圧縮機１に連結されている。
　符号８３は、蒸発器用ファンである。 A refrigerant liquefier 100 is connected to the condenser 2 via a connecting pipe 29, and a decompression device 3 is connected to the refrigerant liquefying device 100 via a connecting pipe 30. The refrigerant liquefier 100 is connected to the liquid line. The evaporator 4 is connected to the decompression device 3 via a connection pipe 31.
The evaporator 4 is provided with a plurality of (five in the present embodiment) straight tubes 41 to 45 and a plurality of heat radiation fins 47, 47, 47. The tubes 41 to 45 are meandering tubes, and the meandering tubes are composed of an inlet side tube 41, an outlet side tube 45, and a plurality of central tubes 42 to 44. The tube 41 on the inlet side is connected to the connecting pipe 31. The outlet of the tube 41 is connected to the inlet of the tube 42 via the vent 61, and the outlet of the tube 42 is connected to the inlet of the tube 43 via the vent 62. The outlet of the tube 43 is connected to the inlet of the tube 44 via the vent 63, and the outlet of the tube 44 is connected to the inlet of the tube 45 via the vent 64. The outlet of the tube 45 is connected to the compressor 1 via the connecting pipe 32.
Reference numeral 83 is an evaporator fan.
　図２Ａ、図２Ｂは、冷媒液化器１００を示す。
　冷媒液化器１００は、円筒状の管体１１０を備え、管体１１０の両端には、連結具１０１、１０２が設けられている。連結具１０１は接続管２９に連結され、連結具１０２は接続管３０に連結されている。
　管体１１０の内周には冷媒液化素子１０５が篏合されている。
　冷媒液化素子１０５は中空状の素子本体１７２を備え、素子本体１７２の外周部には、冷媒を旋回させて流すための螺旋溝部１７３を備えている。螺旋溝部１７３は上流から下流に向けてほぼ等ピッチＰで、素子本体１７２のほぼ全域に亘って設けられている。素子本体１７２の下流側部分の、螺旋溝部１７３が形成されない部分には、図２Ｂに示すように、貫通孔１７９が形成されている。
　冷媒液化素子１０５は、素子本体１７２のランド部１７４を管体１１０の内周面に密着して配置される。冷媒液化素子１０５が管体１１０の内周面に配置されると、ランド部１７４とランド部１７４との間に螺旋溝部１７３が形成される。この螺旋溝部１７３は断面が矩形状である。 2A and 2B show the refrigerant liquefier 100.
The refrigerant liquefier 100 includes a cylindrical tube body 110, and connecting members 101 and 102 are provided at both ends of the tube body 110. The connector 101 is connected to the connecting pipe 29, and the connector 102 is connected to the connecting pipe 30.
A refrigerant liquefying element 105 is integrated with the inner circumference of the tube body 110.
The refrigerant liquefying element 105 has a hollow element body 172, and the spiral groove portion 173 for swirling and flowing the refrigerant is provided on the outer peripheral portion of the element body 172. The spiral groove portions 173 are provided from the upstream side to the downstream side at a substantially equal pitch P over almost the entire area of the element body 172. As shown in FIG. 2B, a through hole 179 is formed in the downstream portion of the element body 172 where the spiral groove 173 is not formed.
The refrigerant liquefying element 105 is arranged such that the land portion 174 of the element body 172 is in close contact with the inner peripheral surface of the tubular body 110. When the refrigerant liquefying element 105 is arranged on the inner peripheral surface of the tubular body 110, a spiral groove 173 is formed between the land 174 and the land 174. The spiral groove portion 173 has a rectangular cross section.
　素子本体１７２の内周部には、冷媒を減圧膨張させて流すための減圧膨張機構１７５を備えている。減圧膨張機構１７５は、素子本体１７２に設けた中空貫通孔である。冷媒は矢印Ｒの方向に流れる。中空貫通孔は、絞り孔１７６と、絞り孔１７６よりも内径が大きい膨張孔１７７とを備えている。中空貫通孔は、絞り孔１７６よりも内径が大きい入口孔１７８を備えている。 A decompression expansion mechanism 175 for decompressing and expanding the refrigerant to flow is provided on the inner peripheral portion of the element body 172. The decompression expansion mechanism 175 is a hollow through hole provided in the element body 172. The refrigerant flows in the direction of arrow R. The hollow through hole includes a throttle hole 176 and an expansion hole 177 having an inner diameter larger than that of the throttle hole 176. The hollow through hole has an inlet hole 178 having an inner diameter larger than that of the throttle hole 176.
　つぎに、本実施形態の作用、効果を説明する。
　圧縮機１の駆動により、矢印Ｒで示す方向に冷媒が流れ、高温高圧のガス冷媒がフィンアンドチューブ形の凝縮器２に流入する。
　このガス冷媒は凝縮器２により凝縮されて液化される。この凝縮器２から流出した液冷媒は、冷媒液化器１００に流れ込む。 Next, the operation and effect of this embodiment will be described.
By driving the compressor 1, the refrigerant flows in the direction indicated by the arrow R, and the high-temperature and high-pressure gas refrigerant flows into the fin-and-tube type condenser 2.
This gas refrigerant is condensed and liquefied by the condenser 2. The liquid refrigerant flowing out from the condenser 2 flows into the refrigerant liquefier 100.
　本実施形態によれば、管体１１０に冷媒液化素子１７１が設けられる。そして、冷媒液化素子１７１が、素子本体１７２の外周部に冷媒を旋回させて流すための螺旋溝部１７３を備えるため、管体１１０の内壁面に接触する流れは旋回流となる。旋回流は、貫通孔１７９を通して、素子本体１７２の内周部に入り、減圧膨張機構１７５を経て減圧された冷媒と合流し、冷媒液化器１００から流出する。旋回流が、管体１１０の内壁面に接触して流れるため、管体１１０内壁面を通じた放熱量が増す。
　冷媒液化素子１７１において、螺旋溝部１７３の冷媒の流れは、管体１１０内を上流から下流に向かう螺旋状の流れ（一次流れ）を生じる。また、螺旋溝部１７３の冷媒の流れは、螺旋溝部１７３の矩形の断面内を中心から辺に沿って互いに反対方向に回転する、一対の回転流れ（二次流れ）を生じる。
　これにより管体１１０の内壁面を通じた、放熱フィン２７の放熱量が増し、冷媒が低温化して、冷媒の過冷却度が進む。 According to this embodiment, the refrigerant liquefaction element 171 is provided in the tube body 110. Since the refrigerant liquefying element 171 includes the spiral groove portion 173 for swirling and flowing the refrigerant in the outer peripheral portion of the element body 172, the flow contacting the inner wall surface of the tubular body 110 is a swirling flow. The swirling flow enters the inner peripheral portion of the element body 172 through the through hole 179, merges with the refrigerant decompressed through the decompression expansion mechanism 175, and flows out from the refrigerant liquefier 100. Since the swirl flow flows in contact with the inner wall surface of the tube body 110, the amount of heat released through the inner wall surface of the tube body 110 increases.
In the refrigerant liquefying element 171, the flow of the refrigerant in the spiral groove portion 173 produces a spiral flow (primary flow) from the upstream side to the downstream side in the tubular body 110. Further, the flow of the refrigerant in the spiral groove portion 173 generates a pair of rotational flows (secondary flows) that rotate in opposite directions along the sides from the center within the rectangular cross section of the spiral groove portion 173.
As a result, the amount of heat dissipated by the heat dissipating fins 27 through the inner wall surface of the tubular body 110 is increased, the temperature of the refrigerant is lowered, and the degree of supercooling of the refrigerant is increased.
　素子本体１７２の内周部には、冷媒を減圧膨張させて流すための減圧膨張機構１７５を備えている。したがって、冷媒が減圧されて、低温化し素子本体１７２を冷却して流れるため、これによって、冷媒の過冷却度が進む。
　減圧膨張機構１７５が、冷媒液化素子１７１の素子本体１７２に設けた中空貫通孔であり、この中空貫通孔が、絞り孔１７６と、当該絞り孔１７６よりも内径が大きい膨張孔１７７とで構成されるため、簡単な構造により冷媒液化素子１７１を構成できる。
　冷媒は、絞り孔１７６で絞られた後に、膨張孔１７７で膨張することにより、減圧膨張される。減圧膨張機構１７５の中空貫通孔は、上流に絞り孔１７６よりも内径が大きい入口孔１７８を備えている。
　入口孔１７８の孔径の大きさを適宜に設定し、螺旋溝部１７３の溝幅の大きさに対する、入口孔１７８の大きさの比率を調整することにより、素子本体１７２の外周側の螺旋溝部１７３を流れる冷媒量と、素子本体１７２の内周側の減圧膨張機構１７５を流れる冷媒量とを調節でき、過冷却度を変更できる。 A decompression expansion mechanism 175 for decompressing and expanding the refrigerant to flow is provided on the inner peripheral portion of the element body 172. Therefore, the refrigerant is decompressed, the temperature of the refrigerant is lowered, and the element body 172 is cooled and flows, so that the degree of supercooling of the refrigerant is increased.
The decompression expansion mechanism 175 is a hollow through hole provided in the element body 172 of the refrigerant liquefying element 171, and this hollow through hole is composed of a throttle hole 176 and an expansion hole 177 having an inner diameter larger than that of the throttle hole 176. Therefore, the refrigerant liquefaction element 171 can be configured with a simple structure.
The refrigerant is squeezed by the throttle hole 176 and then expanded by the expansion hole 177, so that the refrigerant is expanded under reduced pressure. The hollow through hole of the decompression/expansion mechanism 175 has an inlet hole 178 having an inner diameter larger than that of the throttle hole 176 upstream.
By appropriately setting the size of the hole diameter of the inlet hole 178 and adjusting the ratio of the size of the inlet hole 178 to the size of the groove width of the spiral groove portion 173, the spiral groove portion 173 on the outer peripheral side of the element body 172 is adjusted. The amount of refrigerant flowing and the amount of refrigerant flowing through the decompression expansion mechanism 175 on the inner peripheral side of the element body 172 can be adjusted, and the degree of supercooling can be changed.
　本実施形態によれば、素子本体１７２の外周側の螺旋溝部１７３を流れる冷媒量と、素子本体１７２の内周側の減圧膨張機構１７５を流れる冷媒量とが、２対１の割合となるように設定されている。なお、Ｄ１は、絞り孔１７６の内径、Ｄ２は、膨張孔１７７の内径、Ｄ３は、入口孔１７８の内径である。
　冷媒液化器１００を経た冷媒は、減圧装置３で減圧され、フィンアンドチューブ形の蒸発器４に流入する。蒸発器４に流入した液冷媒は蒸発器４によりガス化し、このガス冷媒が圧縮機１の吸込み口に吸い込まれる。 According to the present embodiment, the amount of the refrigerant flowing through the spiral groove portion 173 on the outer peripheral side of the element body 172 and the amount of the refrigerant flowing through the decompression/expansion mechanism 175 on the inner peripheral side of the element body 172 have a ratio of 2:1. Is set to. D1 is the inner diameter of the throttle hole 176, D2 is the inner diameter of the expansion hole 177, and D3 is the inner diameter of the inlet hole 178.
The refrigerant that has passed through the refrigerant liquefier 100 is decompressed by the decompression device 3 and flows into the fin-and-tube type evaporator 4. The liquid refrigerant flowing into the evaporator 4 is gasified by the evaporator 4, and this gas refrigerant is sucked into the suction port of the compressor 1.
　上記実施形態では、図２Ｂに示すように、素子本体１７２に貫通孔１７９が形成されている。貫通孔１７９は、素子本体１７２の外周部を流れる螺旋流れの冷媒と、減圧膨張機構１７５を流れて減圧した冷媒と、を合流させるための孔である。ただし、この構成に限定されるものではない。例えば、図３に示すように、素子本体１７２の長さを短く形成し、素子本体１７２の下流側に、螺旋流れの冷媒と、減圧した冷媒とを合流させる合流部１８０を設けてもよい。 In the above embodiment, as shown in FIG. 2B, a through hole 179 is formed in the element body 172. The through hole 179 is a hole for joining the spiral flow refrigerant flowing in the outer peripheral portion of the element body 172 and the refrigerant decompressed by flowing in the decompression expansion mechanism 175. However, the configuration is not limited to this. For example, as shown in FIG. 3, the element body 172 may be formed to have a short length, and a merging portion 180 for merging the spiral flow refrigerant and the depressurized refrigerant may be provided on the downstream side of the element body 172.
　図４は、別の実施形態を示す。なお、図４では、図１と同一部分には同一符号を付し、その説明は省略する。
　凝縮器２は、複数本（本実施形態では５本）の真直なチューブ２１~２５と、複数枚の放熱フィン２７、２７、２７…とを備えている。チューブ２１~２５は、蛇行式のチューブであり、この蛇行式のチューブは入口側のチューブ２１と出口側のチューブ２５と中央部のチューブ２２~２４とで構成される。入口側のチューブ２１は接続管２８に連結されている。チューブ２１の出口はベント５１を介してチューブ２２の入口に接続され、チューブ２２の出口はベント５２を介してチューブ２３の入口に接続されている。チューブ２３の出口はベント５３を介してチューブ２４の入口に接続され、チューブ２４の出口はベント５４を介してチューブ２５の入口に接続されている。チューブ２５の出口は接続管２９に連結されている。 FIG. 4 shows another embodiment. In FIG. 4, the same parts as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.
The condenser 2 includes a plurality of (five in the present embodiment) straight tubes 21 to 25 and a plurality of heat radiation fins 27, 27, 27.... The tubes 21 to 25 are meandering tubes, and the meandering tubes are composed of an inlet side tube 21, an outlet side tube 25, and central tubes 22 to 24. The tube 21 on the inlet side is connected to the connecting pipe 28. The outlet of the tube 21 is connected to the inlet of the tube 22 via a vent 51, and the outlet of the tube 22 is connected to the inlet of the tube 23 via a vent 52. The outlet of the tube 23 is connected to the inlet of the tube 24 via a vent 53, and the outlet of the tube 24 is connected to the inlet of the tube 25 via a vent 54. The outlet of the tube 25 is connected to the connecting pipe 29.
　接続管２９には減圧装置３が接続され、減圧装置３にはフィンアンドチューブ形の蒸発器４が接続されている。 The pressure reducing device 3 is connected to the connecting pipe 29, and the fin-and-tube type evaporator 4 is connected to the pressure reducing device 3.
　別の実施形態の凝縮器２の構造を説明する。
　図５に示すように、凝縮器２の出口側のチューブ２５には冷媒液化素子（過冷却器）７１が配置されている。冷媒液化素子７１は、直線状に形成された出口側のチューブ２５の入口側に、配置されている。冷媒液化素子７１の長さは任意であるが、チューブ内の流路抵抗を考慮して、該チューブ２５の長さの半分以下が望ましい。 The structure of the condenser 2 of another embodiment will be described.
As shown in FIG. 5, a refrigerant liquefaction element (supercooler) 71 is arranged in the tube 25 on the outlet side of the condenser 2. The refrigerant liquefaction element 71 is arranged on the inlet side of the linearly formed outlet side tube 25. Although the length of the refrigerant liquefying element 71 is arbitrary, it is preferably half or less of the length of the tube 25 in consideration of the flow path resistance in the tube.
　冷媒液化素子７１は中空状の素子本体７２を備え、素子本体７２の外周部には、冷媒を旋回させて流すための螺旋溝部７３を備えている。冷媒液化素子７１は、素子本体７２のランド部７４をチューブ２５の内周面に密着して配置される。冷媒液化素子７１がチューブ２５の内周面に配置されると、素子本体７２のランド部７４とランド部７４との間に螺旋溝部７３が形成されるが、この螺旋溝部７３は断面が矩形状である。素子本体７２の内周部には、冷媒を減圧膨張させて流すための減圧膨張機構７５を備える。減圧膨張機構７５は冷媒液化素子７１の素子本体７２に設けた中空貫通孔である。冷媒は矢印Ｒで示す方向に流れる。中空貫通孔は絞り孔７６と絞り孔７６よりも内径が大きい膨張孔７７とを備える。中空貫通孔は絞り孔７６よりも内径が大きい入口孔７８を備える。 The refrigerant liquefying element 71 has a hollow element body 72, and a spiral groove portion 73 for swirling and flowing the refrigerant is provided on the outer peripheral portion of the element body 72. The refrigerant liquefaction element 71 is arranged such that the land portion 74 of the element body 72 is in close contact with the inner peripheral surface of the tube 25. When the refrigerant liquefying element 71 is arranged on the inner peripheral surface of the tube 25, a spiral groove portion 73 is formed between the land portion 74 of the element body 72 and the land portion 74. The spiral groove portion 73 has a rectangular cross section. Is. A decompression expansion mechanism 75 for decompressing and expanding the refrigerant to flow is provided on the inner peripheral portion of the element body 72. The decompression expansion mechanism 75 is a hollow through hole provided in the element body 72 of the refrigerant liquefying element 71. The refrigerant flows in the direction indicated by arrow R. The hollow through hole includes a throttle hole 76 and an expansion hole 77 having an inner diameter larger than that of the throttle hole 76. The hollow through hole has an inlet hole 78 having an inner diameter larger than that of the throttle hole 76.
　つぎに、本実施形態の作用、効果を説明する。
　圧縮機１の駆動により、矢印Ｒで示す方向に冷媒が流れ、高温高圧のガス冷媒がフィンアンドチューブ形の凝縮器２に流入する。
　このガス冷媒は凝縮器２により凝縮されて液化される。この凝縮器２から流出した液冷媒は、減圧装置３に流れ、減圧装置３で減圧されて、フィンアンドチューブ形の蒸発器４に流入する。この蒸発器４に流入した液冷媒は蒸発器４によりガス化し、このガス冷媒が圧縮機１の吸込み口に吸い込まれる。 Next, the operation and effect of this embodiment will be described.
By driving the compressor 1, the refrigerant flows in the direction indicated by the arrow R, and the high-temperature and high-pressure gas refrigerant flows into the fin-and-tube type condenser 2.
This gas refrigerant is condensed and liquefied by the condenser 2. The liquid refrigerant flowing out of the condenser 2 flows into the pressure reducing device 3, is reduced in pressure by the pressure reducing device 3, and flows into the fin-and-tube type evaporator 4. The liquid refrigerant flowing into the evaporator 4 is gasified by the evaporator 4, and this gas refrigerant is sucked into the suction port of the compressor 1.
　本実施形態では、出口側のチューブ２５に冷媒液化素子７１が設けられ、この冷媒液化素子７１が、素子本体７２の外周部に冷媒を旋回させて流すための螺旋溝部７３を備えるため、出口側のチューブ２５内の流れは旋回流となり、チューブ２５内壁面を通じた、放熱フィン２７の放熱量が増す。
　冷媒液化素子７１において、チューブ２５内の冷媒の流れは、チューブ２５内を上流から下流に向かう螺旋状の流れ（一次流れ）とともに、螺旋溝部７３の矩形の断面内を中心から辺に沿って互いに反対方向に回転する、一対の回転流れ（二次流れ）を生じ、これによりチューブ２５内壁面を通じた、放熱フィン２７の放熱量が増し、冷媒が低温化して、冷媒の過冷却度が進む。
　また、素子本体７２の内周部には、冷媒を減圧膨張させて流すための減圧膨張機構７５を備えている。したがって、減圧膨張機構７５により冷媒が減圧され、低温化し素子本体７２が冷却され、冷媒の過冷却度が進む。 In the present embodiment, the refrigerant liquefaction element 71 is provided in the tube 25 on the outlet side, and the refrigerant liquefaction element 71 has the spiral groove portion 73 for swirling and flowing the refrigerant around the outer periphery of the element body 72. The flow inside the tube 25 becomes a swirl flow, and the heat radiation amount of the radiation fin 27 through the inner wall surface of the tube 25 increases.
In the refrigerant liquefying element 71, the flow of the refrigerant in the tube 25 is the same as the spiral flow (primary flow) flowing from the upstream to the downstream in the tube 25, and along the sides from the center in the rectangular cross section of the spiral groove portion 73. A pair of rotational flows (secondary flows) that rotate in opposite directions are generated, whereby the heat radiation amount of the heat radiation fins 27 through the inner wall surface of the tube 25 increases, the temperature of the refrigerant becomes low, and the degree of supercooling of the refrigerant advances.
A decompression expansion mechanism 75 for decompressing and expanding the refrigerant to flow is provided on the inner peripheral portion of the element body 72. Therefore, the refrigerant is decompressed by the decompression/expansion mechanism 75, the temperature is lowered, the element body 72 is cooled, and the degree of supercooling of the refrigerant is increased.
　減圧膨張機構７５の中空貫通孔は、上流に絞り孔７６よりも内径が大きい入口孔７８を備えている。入口孔７８の孔径の大きさを適宜に設定し、螺旋溝部７３の溝幅の大きさに対する、入口孔７８の大きさの比率を調整することにより、素子本体７２の外周側の螺旋溝部７３を流れる冷媒量と、素子本体７２の内周側の減圧膨張機構７５を流れる冷媒量とを調節できる。この調節により、過冷却度を変更できる。本実施形態では、素子本体７２の外周側の螺旋溝部７３を流れる冷媒量と、素子本体７２の内周側の減圧膨張機構７５を流れる冷媒量とを、２対１の割合に設定されている。Ｄ１は、絞り孔７６の内径、Ｄ２は、膨張孔７７の内径、Ｄ３は、入口孔７８の内径である。 The hollow through hole of the decompression/expansion mechanism 75 has an inlet hole 78 having an inner diameter larger than that of the throttle hole 76 upstream. By setting the size of the hole diameter of the inlet hole 78 appropriately and adjusting the ratio of the size of the inlet hole 78 to the size of the groove width of the spiral groove portion 73, the spiral groove portion 73 on the outer peripheral side of the element main body 72 is adjusted. The amount of refrigerant flowing and the amount of refrigerant flowing through the decompression expansion mechanism 75 on the inner peripheral side of the element body 72 can be adjusted. By this adjustment, the degree of supercooling can be changed. In the present embodiment, the amount of refrigerant flowing through the spiral groove 73 on the outer peripheral side of the element body 72 and the amount of refrigerant flowing through the decompression/expansion mechanism 75 on the inner peripheral side of the element body 72 are set to a ratio of 2:1. .. D1 is the inner diameter of the throttle hole 76, D2 is the inner diameter of the expansion hole 77, and D3 is the inner diameter of the inlet hole 78.
　以上、一実施形態に基づいて本発明を説明したが、本発明は、これら実施形態に限定されるものではない。
　上記実施形態では、図５において、チューブ２５内の素子本体７２は、入口孔７８を上流に向けて配置したが、入口孔７８を下流に向けて、逆組で配置してもよい。この場合には、矢印Ｒと逆の方向に冷媒が流れることとなる。膨張孔７７に入った冷媒は、絞り孔７６で減圧されて、入口孔７８で膨張する。
　チューブ２５内の流れは螺旋溝部７３内で旋回流となるため、チューブ２５内壁面を通じた放熱量が増す。また、膨張孔７７に入った冷媒は、絞り孔７６で減圧されて、入口孔７８で膨張して流れるため、冷媒が減圧され、低温化し素子本体７２が冷却されて、冷媒の過冷却度が進むこととなる。 Although the present invention has been described above based on the embodiments, the present invention is not limited to these embodiments.
In the above embodiment, in FIG. 5, the element body 72 in the tube 25 is arranged with the inlet hole 78 facing upstream, but it may be arranged in a reverse assembly with the inlet hole 78 facing downstream. In this case, the refrigerant flows in the direction opposite to the arrow R. The refrigerant having entered the expansion hole 77 is decompressed by the throttle hole 76 and expanded by the inlet hole 78.
Since the flow in the tube 25 becomes a swirl flow in the spiral groove portion 73, the amount of heat released through the inner wall surface of the tube 25 increases. Further, the refrigerant having entered the expansion hole 77 is decompressed by the throttle hole 76 and expanded and flows at the inlet hole 78, so that the refrigerant is decompressed, the temperature is lowered, and the element body 72 is cooled. Will proceed.
　１　圧縮機
　２　凝縮器
　３　減圧装置
　４　蒸発器
　２１~２５　凝縮器のチューブ
　４１　蒸発器の入口側のチューブ
　４２~４４　中央部のチューブ
　４５　出口側のチューブ
　７１、１０５　冷媒液化素子
　７２、１７２　素子本体
　７３、１７３　螺旋溝部
　７５、１７５　減圧膨張機構
　７６、１７６　絞り孔
　７７、１７７　膨張孔
　７８、１７８　入口孔
　８１　凝縮器用ファン
　８３　蒸発器用ファン
　１００　冷媒液化器
　１１０　管体 1 Compressor 2 Condenser 3 Decompressor 4 Evaporator 21-25 Condenser tube 41 Evaporator inlet side tube 42-44 Central tube 45 Outlet side tube 71, 105 Refrigerant liquefying element 72, 172 Element body 73, 173 spiral groove part 75, 175 decompression expansion mechanism 76, 176 throttle hole 77, 177 expansion hole 78, 178 inlet hole 81 condenser fan 83 evaporator fan 100 refrigerant liquefier 110 tube body

Claims (7)

  1. 　素子本体と、
    　前記素子本体の外周部に設けられ冷媒を旋回させて流す螺旋溝部と、
    　前記素子本体の内周部に設けられ冷媒を減圧膨張させて流す減圧膨張機構と、を備えることを特徴とする冷媒液化素子。     Element body,
    A spiral groove portion that is provided on the outer peripheral portion of the element body to swirl and flow the refrigerant,
    A refrigerant liquefaction element, comprising: a decompression expansion mechanism which is provided on an inner peripheral portion of the element body to decompress and expand the refrigerant to flow.
  2. 　前記減圧膨張機構は前記素子本体に設けた中空貫通孔であり、
    　前記中空貫通孔は絞り孔と当該絞り孔よりも内径が大きい膨張孔と、を備えることを特徴とする請求項１に記載の冷媒液化素子。     The decompression expansion mechanism is a hollow through hole provided in the element body,
    The refrigerant liquefaction element according to claim 1, wherein the hollow through hole includes a throttle hole and an expansion hole having an inner diameter larger than that of the throttle hole.
  3. 　前記中空貫通孔は前記絞り孔よりも内径が大きい入口孔を備えることを特徴とする請求項２に記載の冷媒液化素子。 The refrigerant liquefaction element according to claim 2, wherein the hollow through hole has an inlet hole having an inner diameter larger than that of the throttle hole.
  4. 　管体と、管体に挿入された冷媒液化素子と、を備え、
    　前記冷媒液化素子は、
    　素子本体と、
    　前記素子本体の外周部に設けられ冷媒を旋回させて流す螺旋溝部と、
    　前記素子本体の内周部に設けられ冷媒を減圧膨張させて流す減圧膨張機構と、を備えることを特徴とする冷媒液化器。     A tube body and a refrigerant liquefaction element inserted in the tube body,
    The refrigerant liquefaction element,
    Element body,
    A spiral groove portion that is provided on the outer peripheral portion of the element body to swirl and flow the refrigerant,
    A refrigerant liquefaction device, comprising: a decompression expansion mechanism, which is provided on an inner peripheral portion of the element body and decompresses and expands the refrigerant to flow.
  5. 　フィンと、複数のチューブと、出口側のチューブに挿入される冷媒液化素子と、を備え、
    　前記冷媒液化素子は、
    　素子本体と、
    　前記素子本体の外周部に設けられ冷媒を旋回させて流す螺旋溝部と、
    　前記素子本体の内周部に設けられ冷媒を減圧膨張させて流す減圧膨張機構と、を備えることを特徴とする熱交換器。     A fin, a plurality of tubes, and a refrigerant liquefaction element inserted into the tube on the outlet side,
    The refrigerant liquefaction element,
    Element body,
    A spiral groove portion that is provided on the outer peripheral portion of the element body to swirl and flow the refrigerant,
    A heat exchanger provided with an inner peripheral portion of the element body, and a decompression expansion mechanism that decompresses and expands the refrigerant to flow.
  6. 　圧縮機、凝縮器、減圧装置、蒸発器を備えた冷凍サイクルにおいて、
    　前記凝縮器は出口側のチューブに挿入された冷媒液化素子を備え、この冷媒液化素子は、素子本体と、前記素子本体の外周部に設けられ冷媒を旋回させて流す螺旋溝部と、前記素子本体の内周部に設けられ冷媒を減圧膨張させて流す減圧膨張機構と、を備える、
    　ことを特徴とする冷凍サイクル。     In a refrigeration cycle equipped with a compressor, a condenser, a decompression device, and an evaporator,
    The condenser includes a refrigerant liquefaction element inserted in a tube on the outlet side, and the refrigerant liquefaction element includes an element body, a spiral groove portion provided in an outer peripheral portion of the element body for swirling and flowing the refrigerant, and the element body. A decompression expansion mechanism which is provided on the inner peripheral part of the refrigerant to decompress and expand the refrigerant to flow.
    A refrigeration cycle characterized by that.
  7. 　圧縮機、凝縮器、減圧装置、蒸発器を備えた冷凍サイクルにおいて、
    　前記凝縮器と前記減圧装置の間に接続される管体と、この管体に挿入される冷媒液化素子と、を備え、この冷媒液化素子は、素子本体と、前記素子本体の外周部に設けられ冷媒を旋回させて流す螺旋溝部と、前記素子本体の内周部に設けられ冷媒を減圧膨張させて流す減圧膨張機構と、を備える、
    　ことを特徴とする冷凍サイクル。     In a refrigeration cycle equipped with a compressor, a condenser, a decompression device, and an evaporator,
    A tube body connected between the condenser and the decompression device and a refrigerant liquefaction element inserted into the tube body are provided, and the refrigerant liquefaction element is provided on an element body and an outer peripheral portion of the element body. A spiral groove portion that swirls and flows the refrigerant, and a decompression expansion mechanism that is provided in the inner peripheral portion of the element body to decompress and expand the refrigerant to flow.
    A refrigeration cycle characterized by that.
PCT/JP2019/003539 2019-01-25 2019-01-25 Refrigerant liquefying element, refrigerant liquefier using same, heat exchanger, and refrigeration cycle WO2020152873A1 (en)

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