WO2017175725A1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
WO2017175725A1
WO2017175725A1 PCT/JP2017/013976 JP2017013976W WO2017175725A1 WO 2017175725 A1 WO2017175725 A1 WO 2017175725A1 JP 2017013976 W JP2017013976 W JP 2017013976W WO 2017175725 A1 WO2017175725 A1 WO 2017175725A1
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WO
WIPO (PCT)
Prior art keywords
refrigerant
heat exchanger
liquid
heat
reservoir
Prior art date
Application number
PCT/JP2017/013976
Other languages
French (fr)
Japanese (ja)
Inventor
遼平 杉村
三枝　弘
川久保　昌章
加藤　大輝
伊藤　哲也
Original Assignee
株式会社デンソー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2017070672A external-priority patent/JP6572931B2/en
Application filed by 株式会社デンソー filed Critical 株式会社デンソー
Priority to DE112017001883.8T priority Critical patent/DE112017001883T5/en
Priority to US16/091,917 priority patent/US10845124B2/en
Priority to CN201780021725.0A priority patent/CN108885034B/en
Publication of WO2017175725A1 publication Critical patent/WO2017175725A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • 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
    • 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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat

Definitions

  • This disclosure relates to a heat exchanger.
  • Patent Document 1 Conventionally, as a refrigeration cycle apparatus using such a heat exchanger, for example, there is one described in Patent Document 1 below.
  • the refrigeration cycle apparatus described in Patent Document 1 includes a gas-liquid separator that separates a refrigerant into a gas-phase refrigerant and a liquid-phase refrigerant, a refrigerant circuit in which the refrigerant circulates, a first-mode refrigerant circuit, and a second-mode refrigerant circuit. And switching means for switching to one of the refrigerant circuit.
  • the gas-liquid separator separates the refrigerant flowing out of the outdoor heat exchanger into a gas-phase refrigerant and a liquid-phase refrigerant, causes the gas-phase refrigerant to flow out from the gas-phase refrigerant outlet, and causes the liquid-phase refrigerant to be liquefied. It becomes the structure which can be made to flow out from a phase refrigerant exit.
  • the refrigerant circuit in the first mode is a refrigerant circuit that causes the liquid-phase refrigerant to flow out from the liquid-phase refrigerant outlet of the gas-liquid separator, flow into the second decompression means and the evaporator, and further sucked into the compressor.
  • the refrigerant circuit in the second mode is a refrigerant circuit that causes the gas-phase refrigerant to flow out from the gas-phase refrigerant outlet of the gas-liquid separator and to be sucked into the compressor.
  • the unit including the valves is a reservoir of the reservoir. It is preferable to provide in the vicinity.
  • the heat exchanger and the liquid reservoir are arranged in front of the vehicle and the influence of water dripping from the liquid reservoir in the first place, there is an increased risk that the valves will be covered with water, and some measures are required.
  • valve when the valve is arranged in the vicinity of the reservoir, in the first mode refrigerant circuit, heat from the high-temperature gas flowing into the valve is easily transmitted to the reservoir, and the refrigerant flowing into the reservoir is gasified. If the gasification of the refrigerant proceeds, it will lead to the outflow of the gas refrigerant and the gas-liquid separation performance will be hindered, so some measures are required.
  • the present disclosure can reduce the risk that the valves will be exposed to water when the valves constituting the refrigeration cycle together with the heat exchanger and the liquid reservoir are disposed, and can ensure gas-liquid separation performance against thermal damage from the valves.
  • An object is to provide a heat exchanger.
  • the present disclosure is a heat exchanger used in a refrigeration cycle, and includes a heat exchange unit (3, 4) for exchanging heat between refrigerant passing through the inside and air, and a gas-liquid two-phase refrigerant flowing out from the heat exchange unit.
  • a liquid reservoir (5) that separates gas-liquid into a gas-phase refrigerant and a liquid-phase refrigerant and stores the liquid-phase refrigerant, and adjusts a flow state of the refrigerant flowing through the refrigerant flow path constituting the refrigeration cycle
  • a refrigerant adjusting unit (21, 22) that adjusts an outflow state and an outflow destination of the refrigerant that is supplied to the heat exchanging unit (3) and flows out of the heat exchanging unit (4) or the reservoir (5).
  • the liquid reservoir is formed with a liquid storage region (51a) mainly storing liquid phase refrigerant and an air storage region (51b) mainly storing gas phase refrigerant.
  • the refrigerant adjusting unit is provided on the opposite side of the liquid storage region with the air storage region interposed therebetween.
  • the present disclosure by arranging the first adjustment unit 21 and the second adjustment unit 22 above the liquid reservoir 5, it is possible to reliably prevent the first adjustment unit 21 and the second adjustment unit 22 from receiving water. Can be reduced. Further, since the refrigerant adjustment unit is disposed on the opposite side of the liquid storage region across the gas storage region, even if a part of the liquid phase refrigerant is gasified due to heat damage caused by the refrigerant adjustment unit, the liquid storage region The outflow of the gas refrigerant from can be suppressed.
  • this outflow path becomes a place where the pressure loss is high in the refrigeration cycle.
  • the pressure loss it is necessary to provide a large-diameter outflow path, which deteriorates the vehicle mountability.
  • the diameter of the outflow path is reduced in consideration of the vehicle mountability, the pressure loss increases and the heating performance is reduced.
  • the refrigerant adjusting unit can be disposed close to the air storage region, the path length can be shortened even if the outflow path of the gas-phase refrigerant is increased. Therefore, vehicle mountability can be ensured while reducing pressure loss.
  • FIG. 1 is a heat exchanger according to the first embodiment and is a diagram illustrating a state of cooling operation.
  • Drawing 2 is a heat exchanger concerning a 1st embodiment, and is a figure showing the state of heating operation.
  • FIG. 3 is a view for explaining the liquid level height inside the liquid reservoir.
  • FIG. 4 is a diagram for explaining the heat exchanger according to the second embodiment.
  • FIG. 5 is a view for explaining a heat exchanger according to the third embodiment.
  • FIG. 6 is a view for explaining a heat exchanger according to the fourth embodiment.
  • FIG. 7 is a view for explaining a heat exchanger according to the fifth embodiment.
  • FIG. 8 is a diagram for explaining a heat exchanger according to a comparative example.
  • FIG. 1 is a heat exchanger according to the first embodiment and is a diagram illustrating a state of cooling operation.
  • Drawing 2 is a heat exchanger concerning a 1st embodiment, and is a figure showing the state of heating operation.
  • FIG. 3
  • FIG. 9 is a diagram for explaining the heat exchanger according to the sixth embodiment.
  • FIG. 10 is a diagram for explaining the liquid level disturbance due to the inflow of the liquid refrigerant.
  • FIG. 11 is a heat exchanger according to the seventh embodiment and is a view for explaining an example of forming a buffer space.
  • FIG. 12 is a heat exchanger according to the seventh embodiment and is a diagram for explaining an example in which a buffer space is formed.
  • Drawing 13 is a heat exchanger concerning a 7th embodiment, and is a figure for explaining the example which forms buffer space.
  • FIG. 14 is a heat exchanger according to the seventh embodiment and is a diagram for explaining an example of forming a buffer space.
  • FIG. 15 is a heat exchanger according to the seventh embodiment and is a diagram for explaining an example in which a buffer space is formed.
  • the heat exchanger 2 includes an upstream heat exchange unit 3, a downstream heat exchange unit 4, and a reservoir 5.
  • the upstream heat exchange unit 3 includes two upstream cores 32 and 34 and header tanks 31, 33, and 35. In the present embodiment, an example having two upstream cores 32 and 34 is shown, but the number of cores may be single or three or more.
  • the upstream cores 32 and 34 are portions for exchanging heat between the refrigerant flowing inside and the air flowing outside, and have tubes through which the refrigerant passes and fins provided between the tubes.
  • a header tank 31 is attached to the upstream end of the upstream core 32.
  • a header tank 35 is attached to the downstream end of the upstream core 34.
  • a header tank 33 is attached to the downstream end of the upstream core 32 and the upstream end of the upstream core 34 so as to extend over both.
  • the inlet tank 15 is provided in the header tank 31.
  • a connection channel 11 is provided in the header tank 35.
  • the refrigerant flowing in from the inflow channel 15 flows into the upstream core 32 from the header tank 31.
  • the refrigerant that has flowed through the upstream core 32 flows into the header tank 33.
  • the refrigerant that has flowed through the header tank 33 flows into the upstream core 34.
  • the refrigerant that has flowed through the upstream core 34 flows into the header tank 35.
  • the refrigerant flowing into the header tank 35 flows out to the connection flow path 11.
  • the connection flow path 11 is connected to the liquid reservoir 5.
  • the refrigerant that has flowed out into the connection channel 11 flows into the liquid reservoir 51 of the liquid reservoir 5.
  • the liquid reservoir 5 has a liquid reservoir 51, a connection channel 11, a connection channel 12, and a connection channel 13.
  • the liquid reservoir 51 is a part that separates the gas-liquid two-phase refrigerant flowing from the connection flow path 11 into a liquid-phase refrigerant and a gas-phase refrigerant and accumulates the liquid-phase refrigerant.
  • the connecting channel 11, the connecting channel 12, and the connecting channel 13 are connected to the liquid reservoir 51.
  • the connection flow path 11 is a flow path that connects the upstream heat exchange unit 3 and the liquid reservoir 5.
  • the connection flow path 12 is a flow path that connects the liquid reservoir 5 and the downstream heat exchange unit 4. As shown in FIG. 1, the liquid-phase refrigerant that has flowed out of the connection flow path 12 during the cooling operation flows into the downstream heat exchange unit 4.
  • the connection flow path 13 is a flow path for allowing the gas-phase refrigerant to flow out from the liquid reservoir 5.
  • the downstream heat exchange unit 4 includes a header tank 41, a downstream core 42, and a header tank 43.
  • An outflow channel 14 is connected to the header tank 43.
  • the header tank 43 is provided at the downstream end of the downstream core 42.
  • a header tank 41 is provided at the upstream end of the downstream core 42.
  • a connection channel 12 is connected to the header tank 41.
  • the liquid phase refrigerant flows into the header tank 41 from the connection flow path 12, and the liquid phase refrigerant flows into the downstream core 42 from the header tank 41.
  • the downstream core 42 is a portion that exchanges heat between the refrigerant flowing inside and the air flowing outside, and includes a tube through which the refrigerant passes and fins provided between the tubes. Accordingly, the liquid-phase refrigerant that has flowed into the downstream core 42 is directed to the header tank 43 while being supercooled.
  • the outflow channel 14 is connected to an expansion valve that constitutes the refrigeration cycle apparatus, and an evaporator is connected before the expansion valve.
  • a first adjusting unit 21 and a second adjusting unit 22 as a refrigerant adjusting unit are provided above the liquid reservoir 5.
  • the first adjustment unit 21 is provided with a high-pressure refrigerant inlet 21a and a refrigerant outlet 21b.
  • the high-pressure refrigerant inlet 21 a is an inlet through which high-pressure refrigerant flowing from the compressor or the heat radiating means flows through the flow path 17.
  • the refrigerant outlet 21b is an outlet through which the refrigerant that has flowed in is directly brought into a high pressure or a low pressure and flows out toward the upstream heat exchange unit 3 through the inflow channel 15.
  • the second adjusting unit 22 includes a gas-phase refrigerant inlet 22a and a compressor outlet 22b.
  • the gas-phase refrigerant inlet 22a is an inlet through which the gas-phase refrigerant flowing out from the reservoir 5 through the connection channel 13 flows.
  • the compressor outlet 22b is an outlet for sending the refrigerant flowing into the compressor through the compressor passage 16.
  • the heat exchanger 2 includes the upstream heat exchange unit 3 and the downstream heat exchange unit 4 that exchange heat between the refrigerant passing through the interior and the air, and the upstream heat exchange unit 3.
  • the gas-liquid two-phase refrigerant flowing out from the gas-liquid is separated into a gas-phase refrigerant and a liquid-phase refrigerant, and the flow of the refrigerant flowing in through the reservoir 5 for storing the liquid-phase refrigerant and the refrigerant flow path constituting the refrigeration cycle
  • a first adjusting unit 21 as a refrigerant adjusting unit that adjusts the state and supplies the upstream heat exchanging unit 3 to the upstream heat exchanging unit 3 and adjusts the outflow state and the outflow destination of the refrigerant flowing out of the downstream heat exchanging unit 4 or the reservoir 5;
  • a second adjustment unit 22 is a refrigerant adjusting unit that adjusts the state and supplies the upstream heat exchanging unit 3 to the upstream heat exchanging unit 3 and adjusts the outflow state and the outflow
  • the liquid reservoir 5 is formed with a liquid storage region 51a in which mainly liquid phase refrigerant is stored and an air storage region 51b in which mainly gas phase refrigerant is stored.
  • coolant adjustment parts are provided in the opposite side to the liquid storage area
  • the first adjustment unit 21 and the second adjustment unit 22 are refrigerant adjustment units disposed on the opposite side of the liquid storage region 51a across the air storage region 51b, the heat adjustment caused by the refrigerant adjustment unit causes Even if a part of the liquid-phase refrigerant is gasified, the outflow of the gas refrigerant from the liquid storage region 51a can be suppressed.
  • the outflow path of the gas-phase refrigerant can be increased in diameter and shortened, and both suppression of pressure loss and securing of vehicle mounting properties can be achieved.
  • the gas storage area 51b is arranged at a position that is at least half of the liquid reservoir 51 in the height direction.
  • the height of the liquid reservoir 5 is set by accumulating “leakage over time”, “absorption of load fluctuation”, and “margin”. “Aging leakage” is the amount of refrigerant that leaks from each part according to the number of years of use when the heat exchanger 2 is used in a refrigeration cycle, and anticipates that amount. “Load fluctuation absorption” is intended to allow for fluctuations in the amount of liquid-phase refrigerant that flows in when operating the refrigeration cycle. Since “aging leak” and “load fluctuation absorption” are the liquid level height required for the design of the liquid reservoir 5, it is preferable that the connection flow path 12 is provided above this height.
  • the first adjustment unit 21A and the second adjustment unit 22A are offset and arranged above the liquid reservoir 5.
  • the connecting flow path 13A in a crank shape and extending the inflow flow path 15A, the first adjusting portion 21A and the second adjusting portion 22A can be arranged not directly above the reservoir 5.
  • connection flow path 11 is provided for allowing the gas-liquid two-phase refrigerant flowing out from the upstream heat exchange section 3 to flow into the liquid reservoir 5.
  • the connection flow path 11 is connected to communicate with an inflow port 501 provided in the air storage region 51b.
  • coolant adjustment part are the one end side in the refrigerant
  • the piping path can be shortened and an increase in refrigerant pressure loss can be suppressed.
  • the adjustment unit 22 and the liquid reservoir 5 are arranged. More specifically, when viewed from the direction in which the longitudinal direction of the liquid reservoir 5 is seen, that is, from the upper side or the lower side with respect to the longitudinal direction of the liquid reservoir 5, the first adjusting unit 21, the second adjusting unit 22, and the liquid reservoir. When looking at 5, they are arranged so that a part of each overlaps. By arranging in this way, space saving can be realized.
  • the embodiment is not limited to arranging the first adjustment unit 21 and the second adjustment unit 22 and the liquid reservoir 5 so as to completely overlap. .
  • the heat exchanger 2 ⁇ / b> B is arranged such that the first adjustment unit 21 ⁇ / b> B and the second adjustment unit 22 ⁇ / b> B are arranged in the horizontal direction.
  • a flow path 17B is connected to the first adjustment unit 21B and is disposed immediately above the header tank 31.
  • the first adjustment unit 21B and the header tank 31 are connected by an extremely short inflow channel 15B.
  • the second adjustment unit 22 ⁇ / b> B is disposed immediately above the liquid reservoir 5. Since the distance between the liquid reservoir 5 and the second adjustment unit 22B is increased, the connection flow path 13B is extended.
  • the first adjusting unit 21 and the second adjusting unit 22 that are refrigerant adjusting units are connected to the upstream side heat exchanging unit 3 through the connection flow path 13B for flowing out the refrigerant, and constitute a refrigeration cycle.
  • a flow path 16B for the compressor that flows out the refrigerant to the compressor is connected.
  • the heat exchanger 2 ⁇ / b> C is configured so that the liquid-phase refrigerant flowing out from the liquid storage region 51 a of the liquid storage device 5 merges with the refrigerant flowing out from the compressor outlet / outlet 22 b. It is configured. More specifically, a connection channel 12 ⁇ / b> C that connects the lower part of the liquid reservoir 5 and the connection channel 13 is provided.
  • the upstream heat exchange part 3 which heat-exchanges the refrigerant
  • Side heat exchanging section 4. The reservoir 5, the first adjusting unit 21 and the second adjusting unit 22 that are refrigerant adjusting units, the upstream heat exchanging unit 3, and the downstream heat exchanging unit 4 are integrally coupled.
  • the 1st adjustment part 21 is provided between the high pressure refrigerant
  • the 2nd adjustment part 22 is provided between the gaseous-phase refrigerant
  • the first adjustment unit 21 and the liquid reservoir 5 are provided on opposite sides of the second adjustment unit 22.
  • the gas-phase refrigerant inlet 22a can be disposed at the shortest distance from the air-storage region 51b, so that the pressure loss of the gas-phase refrigerant can be reduced.
  • the heat exchanger 2D includes an upstream heat exchange unit 3, a downstream heat exchange unit 4, and a liquid reservoir 5.
  • the upstream heat exchange unit 3 includes two upstream cores 32 and 34 and header tanks 31, 33, and 35. In the present embodiment, an example having two upstream cores 32 and 34 is shown, but the number of cores may be single or three or more.
  • the upstream cores 32 and 34 are portions for exchanging heat between the refrigerant flowing inside and the air flowing outside, and have tubes through which the refrigerant passes and fins provided between the tubes.
  • a header tank 31 is attached to the upstream end of the upstream core 32.
  • a header tank 35 is attached to the downstream end of the upstream core 34.
  • a header tank 33 is attached to the downstream end of the upstream core 32 and the upstream end of the upstream core 34 so as to extend over both.
  • the inlet tank 15 is provided in the header tank 31.
  • a connection channel 11 is provided in the header tank 35.
  • the refrigerant flowing in from the inflow channel 15 flows into the upstream core 32 from the header tank 31.
  • the refrigerant that has flowed through the upstream core 32 flows into the header tank 33.
  • the refrigerant that has flowed through the header tank 33 flows into the upstream core 34.
  • the refrigerant that has flowed through the upstream core 34 flows into the header tank 35.
  • the refrigerant flowing into the header tank 35 flows out to the connection flow path 11.
  • the connection flow path 11 is connected to the liquid reservoir 5.
  • the liquid reservoir 5 has a liquid reservoir 51, a connection channel 11, a connection channel 12, and a connection channel 13.
  • the liquid reservoir 51 is a part that separates the gas-liquid two-phase refrigerant flowing from the connection flow path 11 into a liquid-phase refrigerant and a gas-phase refrigerant and accumulates the liquid-phase refrigerant.
  • connection flow path 11 is a flow path that connects the upstream heat exchange unit 3 and the liquid reservoir 5.
  • connection flow path 12 is a flow path that connects the liquid reservoir 5 and the downstream heat exchange unit 4.
  • the liquid-phase refrigerant that has flowed out of the connection flow path 12 flows into the downstream heat exchange unit 4.
  • connection path 13 is a path that connects the liquid reservoir 5 and the refrigerant adjustment unit 6.
  • a liquid storage space 511 is formed in the liquid reservoir 51.
  • An inlet 512 and an outlet 513 are formed so as to be connected to the liquid storage space 511.
  • the connection channel 11 is connected to the inflow port 512.
  • the connection channel 12 is connected to the outflow port 513.
  • a refrigerant adjustment unit 6 is provided above the liquid reservoir 5.
  • An inflow channel 17 and an inflow channel 15 are connected to the refrigerant adjustment unit 6.
  • the inflow channel 17 is a channel into which high-pressure refrigerant flowing from the compressor flows.
  • the inflow channel 15 is a channel through which the refrigerant that has flowed in is kept at a high pressure or a low pressure and flows out toward the upstream heat exchange unit 3.
  • the refrigerant flow adjustment section 6 is connected to a connection flow path 13 and a flow path 16 for the compressor.
  • the connection flow path 13 is a flow path into which the gas-phase refrigerant flowing out from the liquid reservoir 5 flows.
  • the compressor-bound flow path 16 is a flow path for sending the refrigerant flowing in to the compressor.
  • the refrigerant adjustment unit 6 includes a main body part 61 in which an internal flow path is formed and a valve body and a valve seat are arranged, a seal part 63, and an actuator 64 that drives the valve body.
  • the refrigerant that has flowed out into the connection flow path 11 flows into the buffer region 66 of the refrigerant adjustment unit 6 via the inflow port 512.
  • the buffer region 66 is formed above the connection flow path 13.
  • a communication hole 67 is provided so that the refrigerant flowing from the inlet 512 can flow into the buffer region 66.
  • the communication hole 67 is provided at a location where the main body portion 61 faces the inflow port 512.
  • the refrigerant flowing from the inlet 512 flows into the buffer region 66.
  • the liquid refrigerant flowing from the connection channel 11 can cool the heat damage caused by the SH gas passing from the connection channel 17 to the connection channel 15, thereby suppressing gasification in the upper part of the liquid storage space and ensuring gas-liquid separation. can do.
  • the downstream heat exchange unit 4 includes a header tank 41, a downstream core 42, and a header tank 43.
  • An outflow channel 14 is connected to the header tank 43.
  • the header tank 43 is provided at the downstream end of the downstream core 42.
  • a header tank 41 is provided at the upstream end of the downstream core 42.
  • a connection channel 12 is connected to the header tank 41.
  • the liquid phase refrigerant flows into the header tank 41 from the connection flow path 12, and the liquid phase refrigerant flows into the downstream core 42 from the header tank 41.
  • the downstream core 42 is a portion that exchanges heat between the refrigerant flowing inside and the air flowing outside, and includes a tube through which the refrigerant passes and fins provided between the tubes. Accordingly, the liquid-phase refrigerant that has flowed into the downstream core 42 is directed to the header tank 43 while being supercooled.
  • the outflow channel 14 is connected to an expansion valve that constitutes the refrigeration cycle apparatus, and an evaporator is connected before the expansion valve.
  • the refrigerant adjustment unit 6 is provided above the liquid storage space 511 that is a liquid storage region.
  • the refrigerant inflow path from the upstream heat exchange unit 3 to the liquid storage space 511 that is the liquid storage region is configured to pass through the refrigerant adjustment unit 6.
  • the refrigerant adjusting unit 6 is disposed above the liquid storage space 511 and no measures are taken, the liquid refrigerant stagnates below the liquid storage space 511 during heating operation, and the amount of refrigerant circulating in the refrigeration cycle decreases. There is a risk that. A decrease in the refrigerant amount leads to a decrease in heating performance and a decrease in the amount of circulating oil. If the circulating oil amount decreases, the compressor may be locked. Therefore, the refrigerant inflow path from the heat exchange unit 3 to the liquid storage space 511 is routed through the refrigerant adjustment unit 6 so that the refrigerant can be recirculated into the refrigeration cycle without flowing into the liquid storage space 511 during heating. it can.
  • the inflow port 512 connects with the connection flow path 11 into which the refrigerant
  • 3 is provided with a connection flow path 12 through which the refrigerant flowing out from 3 and entering the liquid storage space 511, which is a liquid storage area, flows out to the heat exchanging section 4, and the outlet 513 is disposed below the inlet 512.
  • the inflow port 512 is disposed above the liquid storage space 511 that is a liquid storage area.
  • the refrigerant adjustment unit 6E is disposed below. Will flow. In order to reduce the influence of such gas inflow, it is preferable to arrange the refrigerant adjustment unit 6 upward as in the present embodiment.
  • the heat exchanger 2G according to the sixth embodiment shown in FIG. 9 further suppresses the liquid level disturbance in the liquid reservoir due to the liquid refrigerant flowing from above with respect to the configuration of the heat exchanger 2D.
  • a conduit 68G is provided.
  • the lower end 681G of the conduit 68G is arranged to be positioned below the outflow port 513.
  • a buffer region 66G is provided in the main body 61G constituting the refrigerant adjustment unit 6F.
  • a communication hole 67G is provided so that the refrigerant flowing from the inlet 512 can flow into the buffer region 66G.
  • the communication hole 67G is provided at a location where the main body 61G faces the inflow port 512.
  • An opening 682G is provided below the buffer region 66G of the main body 61G.
  • a conduit 68G is disposed so as to penetrate through the opening 682G.
  • the valve body 69G is lowered to block the conduit 68G. Since the return hole 691G is provided in the valve body 69G, the refrigerant rising from the opening provided in the lower end 681G returns to the refrigeration cycle through the return hole 691G.
  • the gap portion 65H is provided without using the seal portion 63.
  • the gap portion 65H forms a gap portion 65H by retracting a part of the main body portion 61H.
  • the heat exchanger 2J includes a liquid reservoir 5J and a refrigerant adjustment unit 6J.
  • a buffer region 66J is formed in the refrigerant adjustment unit 6J.
  • the buffer region 66J is formed above the outflow channel 13J.
  • a communication hole 67 is provided so that the refrigerant flowing in from the inflow port 512 can flow into the buffer region 66J.
  • the communication hole 67 is provided at a location where the main body portion 61J faces the inflow port 512.
  • the refrigerant flowing from the inlet 512 flows into the buffer region 66J.
  • the refrigerant temporarily stored in the buffer region 66J flows down from the outflow passage 13J to the liquid storage space 511. Therefore, the refrigerant falls gently, and the liquid level disturbance is reduced.
  • the heat exchanger 2K includes a liquid reservoir 5K.
  • a buffer region 66K is formed in the liquid reservoir 5K.
  • the buffer region 66K is formed between the refrigerant adjustment unit 6 and the buffer plate 52Ka.
  • the buffer plate 52Ka is a plate-like member disposed in the liquid storage space 511. As shown in FIG. 13, the buffer plate 52Ka is provided with a plurality of through holes 521a. As shown in FIG. 14, a buffer plate 52Kb provided with a single through hole 521b can also be used. As shown in FIG. 15, a buffer plate 52 ⁇ / b> Kc having a recess 521 c on the side surface may be used so as to form a gap between the inner wall of the liquid reservoir 51. When the buffer plate 52Kc is used, the refrigerant flows along the inner wall surface of the liquid reservoir 51, so that the effect of suppressing the liquid level disturbance is enhanced.

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

Abstract

A heat exchanger 2 is provided with: a liquid reservoir 5 in which gas-liquid separation of a gas-liquid double-phase refrigerant, which has flowed out from an upstream-side heat exchanging part 3, into a gas-phase refrigerant and a liquid-phase refrigerant is carried out, and the liquid-phase refrigerant is retained; and a first adjustment part 21 and a second adjustment part 22 that adjust the flow state of refrigerant that flows in and supply the refrigerant to the upstream-side heat exchanging part 3, and adjust the outflow state and outflow destination of refrigerant that flows out from a downstream-side heat exchanging part 4 or the liquid reservoir 5. In the liquid reservoir 5 are formed a liquid reservoir area 51a in which mainly liquid-phase refrigerant accumulates, and a gas reservoir area 51b in which mainly gas-phase refrigerant accumulates. The first adjustment part 21 and the second adjustment part 22 are provided on the opposite side of the liquid reservoir area 51a, with the gas reservoir area 51b therebetween.

Description

熱交換器Heat exchanger 関連出願の相互参照Cross-reference of related applications
　本出願は、2016年4月8日に出願された日本国特許出願2016-078225号と、2017年3月31日に出願された日本国特許出願2017-070672号と、に基づくものであって、その優先権の利益を主張するものであり、その特許出願の全ての内容が、参照により本明細書に組み込まれる。 This application is based on Japanese Patent Application No. 2016-078225 filed on April 8, 2016 and Japanese Patent Application No. 2017-070672 filed on March 31, 2017. Claims the benefit of that priority, the entire contents of which are incorporated herein by reference.
　本開示は、熱交換器に関する。 This disclosure relates to a heat exchanger.
　従来、この種の熱交換器が用いられた冷凍サイクル装置として、例えば下記特許文献１に記載されたものがある。この特許文献１に記載れた冷凍サイクル装置は、冷媒を気相冷媒と液相冷媒とに分離する気液分離器と、冷媒が循環する冷媒回路を第１モードの冷媒回路と第２モードの冷媒回路との一方に切り替える切替手段とを有している。具体的には、その気液分離器は、室外熱交換器から流出した冷媒を気相冷媒と液相冷媒とに分離し、気相冷媒を気相冷媒出口から流出させ、液相冷媒を液相冷媒出口から流出させることが可能な構成となっている。また、第１モードの冷媒回路は、気液分離器の液相冷媒出口から液相冷媒を流出させて第２減圧手段及び蒸発器に流入させ、更に圧縮機に吸入させる冷媒回路である。第２モードの冷媒回路は、気液分離器の気相冷媒出口から気相冷媒を流出させて圧縮機に吸入させる冷媒回路である。 Conventionally, as a refrigeration cycle apparatus using such a heat exchanger, for example, there is one described in Patent Document 1 below. The refrigeration cycle apparatus described in Patent Document 1 includes a gas-liquid separator that separates a refrigerant into a gas-phase refrigerant and a liquid-phase refrigerant, a refrigerant circuit in which the refrigerant circulates, a first-mode refrigerant circuit, and a second-mode refrigerant circuit. And switching means for switching to one of the refrigerant circuit. Specifically, the gas-liquid separator separates the refrigerant flowing out of the outdoor heat exchanger into a gas-phase refrigerant and a liquid-phase refrigerant, causes the gas-phase refrigerant to flow out from the gas-phase refrigerant outlet, and causes the liquid-phase refrigerant to be liquefied. It becomes the structure which can be made to flow out from a phase refrigerant exit. The refrigerant circuit in the first mode is a refrigerant circuit that causes the liquid-phase refrigerant to flow out from the liquid-phase refrigerant outlet of the gas-liquid separator, flow into the second decompression means and the evaporator, and further sucked into the compressor. The refrigerant circuit in the second mode is a refrigerant circuit that causes the gas-phase refrigerant to flow out from the gas-phase refrigerant outlet of the gas-liquid separator and to be sucked into the compressor.
特開２０１４－１４９１２３号公報JP 2014-149123 A
　上記特許文献１には特段の記載は無いが、冷凍サイクルを構成するバルブ類を設ける場合、貯液器から流出する気相冷媒の圧損を低減するため、バルブ類を含むユニットは貯液器の近傍に設けることが好ましい。しかしながら、熱交換器及び貯液器が車両前方に配置されることや、そもそも貯液器から滴下する水の影響を鑑みると、バルブ類が水を被るおそれが高まり、何らかの対策が必要となる。更に、バルブを貯液器近傍に配置すると、第１モードの冷媒回路では、バルブに流入する高温ガスからの熱が貯液器に伝わりやすくなり、貯液器に流れ込んだ冷媒がガス化する。冷媒のガス化が進行すると、ガス冷媒の流出に繋がり気液分離性能が阻害されるため、何らかの対策が必要となる。 Although there is no special description in the above-mentioned Patent Document 1, in the case where valves constituting the refrigeration cycle are provided, in order to reduce the pressure loss of the gas-phase refrigerant flowing out of the reservoir, the unit including the valves is a reservoir of the reservoir. It is preferable to provide in the vicinity. However, in view of the fact that the heat exchanger and the liquid reservoir are arranged in front of the vehicle and the influence of water dripping from the liquid reservoir in the first place, there is an increased risk that the valves will be covered with water, and some measures are required. Further, when the valve is arranged in the vicinity of the reservoir, in the first mode refrigerant circuit, heat from the high-temperature gas flowing into the valve is easily transmitted to the reservoir, and the refrigerant flowing into the reservoir is gasified. If the gasification of the refrigerant proceeds, it will lead to the outflow of the gas refrigerant and the gas-liquid separation performance will be hindered, so some measures are required.
　本開示は、熱交換器や貯液器と共に冷凍サイクルを構成するバルブ類を近傍に配置するにあたって、バルブ類が水を被るおそれを低減し、バルブからの熱害に対する気液分離性能を確保できる熱交換器を提供することを目的とする。 The present disclosure can reduce the risk that the valves will be exposed to water when the valves constituting the refrigeration cycle together with the heat exchanger and the liquid reservoir are disposed, and can ensure gas-liquid separation performance against thermal damage from the valves. An object is to provide a heat exchanger.
　本開示は、冷凍サイクルに用いられる熱交換器であって、内部を通過する冷媒と空気とを熱交換させる熱交換部（３，４）と、熱交換部から流出した気液二相冷媒を気相冷媒と液相冷媒とに気液分離し、液相冷媒を溜める貯液器（５）と、前記冷凍サイクルを構成する冷媒流路を通って流入する冷媒の流動状態を調整して前記熱交換部（３）に供給し、前記熱交換部（４）又は前記貯液器（５）から流出する冷媒の流出状態及び流出先を調整する冷媒調整部（２１，２２）と、を備える。前記貯液器には、主に液相冷媒が溜まる貯液領域（５１ａ）と、主に気相冷媒が溜まる貯気領域（５１ｂ）とが形成されている。前記冷媒調整部は、前記貯気領域を挟んで前記貯液領域とは反対側に設けられている。 The present disclosure is a heat exchanger used in a refrigeration cycle, and includes a heat exchange unit (3, 4) for exchanging heat between refrigerant passing through the inside and air, and a gas-liquid two-phase refrigerant flowing out from the heat exchange unit. A liquid reservoir (5) that separates gas-liquid into a gas-phase refrigerant and a liquid-phase refrigerant and stores the liquid-phase refrigerant, and adjusts a flow state of the refrigerant flowing through the refrigerant flow path constituting the refrigeration cycle And a refrigerant adjusting unit (21, 22) that adjusts an outflow state and an outflow destination of the refrigerant that is supplied to the heat exchanging unit (3) and flows out of the heat exchanging unit (4) or the reservoir (5). . The liquid reservoir is formed with a liquid storage region (51a) mainly storing liquid phase refrigerant and an air storage region (51b) mainly storing gas phase refrigerant. The refrigerant adjusting unit is provided on the opposite side of the liquid storage region with the air storage region interposed therebetween.
　本開示によれば、第１調整部２１及び第２調整部２２を、貯液器５よりも上方に配置することで、第１調整部２１及び第２調整部２２が水を被る恐れを確実に低減することができる。更に、冷媒調整部が貯気領域を挟んで貯液領域とは反対側に配置されているので、冷媒調整部に起因する熱害によって液相冷媒の一部がガス化しても、貯液領域からのガス冷媒の流出を抑制することができる。 According to the present disclosure, by arranging the first adjustment unit 21 and the second adjustment unit 22 above the liquid reservoir 5, it is possible to reliably prevent the first adjustment unit 21 and the second adjustment unit 22 from receiving water. Can be reduced. Further, since the refrigerant adjustment unit is disposed on the opposite side of the liquid storage region across the gas storage region, even if a part of the liquid phase refrigerant is gasified due to heat damage caused by the refrigerant adjustment unit, the liquid storage region The outflow of the gas refrigerant from can be suppressed.
　更に、第２モードの冷媒回路では、気相冷媒の流出先にバルブが設けられているため、この流出経路は冷凍サイクル中で圧力損失が高い場所になる。圧力損失を低減するためには、大径の流出経路を設ける必要があり、車両搭載性が悪化する。一方、車両搭載性を考慮して流出経路を小径化すると、圧力損失が高まり、暖房性能の低下を招くことになる。これに対して、冷媒調整部を貯気領域に近接配置することができるので、気相冷媒の流出経路を大径化したとしても、その経路長を短くすることができる。従って、圧力損失を低減しつつ、車両搭載性も確保することができる。 Furthermore, in the second mode refrigerant circuit, since the valve is provided at the outflow destination of the gas phase refrigerant, this outflow path becomes a place where the pressure loss is high in the refrigeration cycle. In order to reduce the pressure loss, it is necessary to provide a large-diameter outflow path, which deteriorates the vehicle mountability. On the other hand, if the diameter of the outflow path is reduced in consideration of the vehicle mountability, the pressure loss increases and the heating performance is reduced. On the other hand, since the refrigerant adjusting unit can be disposed close to the air storage region, the path length can be shortened even if the outflow path of the gas-phase refrigerant is increased. Therefore, vehicle mountability can be ensured while reducing pressure loss.
　尚、「発明の概要」及び「請求の範囲」に記載した括弧内の符号は、後述する「発明を実施するための形態」との対応関係を示すものであって、「発明の概要」及び「請求の範囲」が、後述する「発明を実施するための形態」に限定されることを示すものではない。 The reference numerals in parentheses described in the “Summary of the Invention” and “Claims” indicate the correspondence with the “Mode for Carrying Out the Invention” to be described later. It does not indicate that the “claims” are limited to the “modes for carrying out the invention” described below.
図１は、第１実施形態に係る熱交換器であって、冷房運転の状態を示す図である。FIG. 1 is a heat exchanger according to the first embodiment and is a diagram illustrating a state of cooling operation. 図２は、第１実施形態に係る熱交換器であって、暖房運転の状態を示す図である。 Drawing 2 is a heat exchanger concerning a 1st embodiment, and is a figure showing the state of heating operation. 図３は、貯液器内部の液面高さを説明するための図である。FIG. 3 is a view for explaining the liquid level height inside the liquid reservoir. 図４は、第２実施形態に係る熱交換器を説明するための図である。FIG. 4 is a diagram for explaining the heat exchanger according to the second embodiment. 図５は、第３実施形態に係る熱交換器を説明するための図である。FIG. 5 is a view for explaining a heat exchanger according to the third embodiment. 図６は、第４実施形態に係る熱交換器を説明するための図である。FIG. 6 is a view for explaining a heat exchanger according to the fourth embodiment. 図７は、第５実施形態に係る熱交換器を説明するための図である。FIG. 7 is a view for explaining a heat exchanger according to the fifth embodiment. 図８は、比較例に係る熱交換器を説明するための図である。FIG. 8 is a diagram for explaining a heat exchanger according to a comparative example. 図９は、第６実施形態に係る熱交換器を説明するための図である。FIG. 9 is a diagram for explaining the heat exchanger according to the sixth embodiment. 図１０は、液冷媒の流入による液面乱れを説明するための図である。FIG. 10 is a diagram for explaining the liquid level disturbance due to the inflow of the liquid refrigerant. 図１１は、第７実施形態に係る熱交換器であって、緩衝空間を形成する例について説明するための図である。FIG. 11 is a heat exchanger according to the seventh embodiment and is a view for explaining an example of forming a buffer space. 図１２は、第７実施形態に係る熱交換器であって、緩衝空間を形成する例について説明するための図である。FIG. 12 is a heat exchanger according to the seventh embodiment and is a diagram for explaining an example in which a buffer space is formed. 図１３は、第７実施形態に係る熱交換器であって、緩衝空間を形成する例について説明するための図である。Drawing 13 is a heat exchanger concerning a 7th embodiment, and is a figure for explaining the example which forms buffer space. 図１４は、第７実施形態に係る熱交換器であって、緩衝空間を形成する例について説明するための図である。FIG. 14 is a heat exchanger according to the seventh embodiment and is a diagram for explaining an example of forming a buffer space. 図１５は、第７実施形態に係る熱交換器であって、緩衝空間を形成する例について説明するための図である。FIG. 15 is a heat exchanger according to the seventh embodiment and is a diagram for explaining an example in which a buffer space is formed.
　以下、添付図面を参照しながら本実施形態について説明する。説明の理解を容易にするため、各図面において同一の構成要素に対しては可能な限り同一の符号を付して、重複する説明は省略する。 Hereinafter, the present embodiment will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.
　図１及び図２に示されるように、第１実施形態に係る熱交換器２は、上流側熱交換部３と、下流側熱交換部４と、貯液器５と、を備えている。上流側熱交換部３は、２つの上流側コア３２，３４と、ヘッダタンク３１，３３，３５と、を有している。本実施形態では一例として２つの上流側コア３２，３４を有するものを示したが、コアは単一でも３つ以上でも構わない。上流側コア３２，３４は、内部を流れる冷媒と外部を流れる空気との間で熱交換をする部分であって、冷媒が通るチューブと、チューブ間に設けられたフィンとを有する。 As shown in FIGS. 1 and 2, the heat exchanger 2 according to the first embodiment includes an upstream heat exchange unit 3, a downstream heat exchange unit 4, and a reservoir 5. The upstream heat exchange unit 3 includes two upstream cores 32 and 34 and header tanks 31, 33, and 35. In the present embodiment, an example having two upstream cores 32 and 34 is shown, but the number of cores may be single or three or more. The upstream cores 32 and 34 are portions for exchanging heat between the refrigerant flowing inside and the air flowing outside, and have tubes through which the refrigerant passes and fins provided between the tubes.
　上流側コア３２の上流側端には、ヘッダタンク３１が取り付けられている。上流側コア３４の下流側端には、ヘッダタンク３５が取り付けられている。上流側コア３２の下流側端及び上流側コア３４の上流側端には、双方に跨って配置されるヘッダタンク３３が取り付けられている。 A header tank 31 is attached to the upstream end of the upstream core 32. A header tank 35 is attached to the downstream end of the upstream core 34. A header tank 33 is attached to the downstream end of the upstream core 32 and the upstream end of the upstream core 34 so as to extend over both.
　ヘッダタンク３１には流入流路１５が設けられている。ヘッダタンク３５には接続流路１１が設けられている。流入流路１５から流入した冷媒は、ヘッダタンク３１から上流側コア３２に流入する。上流側コア３２を流れた冷媒は、ヘッダタンク３３に流入する。ヘッダタンク３３内を流れた冷媒は、上流側コア３４に流入する。上流側コア３４を流れた冷媒は、ヘッダタンク３５に流入する。ヘッダタンク３５に流入した冷媒は、接続流路１１に流出する。接続流路１１は貯液器５に繋がれている。接続流路１１に流出した冷媒は、貯液器５の液溜部５１内部に流入する。 The inlet tank 15 is provided in the header tank 31. A connection channel 11 is provided in the header tank 35. The refrigerant flowing in from the inflow channel 15 flows into the upstream core 32 from the header tank 31. The refrigerant that has flowed through the upstream core 32 flows into the header tank 33. The refrigerant that has flowed through the header tank 33 flows into the upstream core 34. The refrigerant that has flowed through the upstream core 34 flows into the header tank 35. The refrigerant flowing into the header tank 35 flows out to the connection flow path 11. The connection flow path 11 is connected to the liquid reservoir 5. The refrigerant that has flowed out into the connection channel 11 flows into the liquid reservoir 51 of the liquid reservoir 5.
　貯液器５は、液溜部５１と、接続流路１１と、接続流路１２と、接続流路１３と、を有している。液溜部５１は、接続流路１１から流入する気液二相冷媒を液相冷媒と気相冷媒とに分離し、液相冷媒を溜める部分である。 The liquid reservoir 5 has a liquid reservoir 51, a connection channel 11, a connection channel 12, and a connection channel 13. The liquid reservoir 51 is a part that separates the gas-liquid two-phase refrigerant flowing from the connection flow path 11 into a liquid-phase refrigerant and a gas-phase refrigerant and accumulates the liquid-phase refrigerant.
　液溜部５１には、接続流路１１と、接続流路１２と、接続流路１３と、が繋がれている。接続流路１１は、上流側熱交換部３と貯液器５とを繋ぐ流路である。接続流路１２は、貯液器５と下流側熱交換部４とを繋ぐ流路である。図１に示されるように、冷房運転時に接続流路１２から流出した液相冷媒は、下流側熱交換部４に流入する。接続流路１３は、貯液器５から気相冷媒を流出させる流路である。 The connecting channel 11, the connecting channel 12, and the connecting channel 13 are connected to the liquid reservoir 51. The connection flow path 11 is a flow path that connects the upstream heat exchange unit 3 and the liquid reservoir 5. The connection flow path 12 is a flow path that connects the liquid reservoir 5 and the downstream heat exchange unit 4. As shown in FIG. 1, the liquid-phase refrigerant that has flowed out of the connection flow path 12 during the cooling operation flows into the downstream heat exchange unit 4. The connection flow path 13 is a flow path for allowing the gas-phase refrigerant to flow out from the liquid reservoir 5.
　下流側熱交換部４は、ヘッダタンク４１と、下流側コア４２と、ヘッダタンク４３と、を有している。ヘッダタンク４３には、流出流路１４が繋がれている。ヘッダタンク４３は、下流側コア４２の下流側端に設けられている。下流側コア４２の上流側端には、ヘッダタンク４１が設けられている。ヘッダタンク４１には、接続流路１２が繋がれている。 The downstream heat exchange unit 4 includes a header tank 41, a downstream core 42, and a header tank 43. An outflow channel 14 is connected to the header tank 43. The header tank 43 is provided at the downstream end of the downstream core 42. A header tank 41 is provided at the upstream end of the downstream core 42. A connection channel 12 is connected to the header tank 41.
　接続流路１２からヘッダタンク４１に液相冷媒が流入し、ヘッダタンク４１から下流側コア４２に液相冷媒が流入する。下流側コア４２は、内部を流れる冷媒と外部を流れる空気との間で熱交換をする部分であって、冷媒が通るチューブと、チューブ間に設けられたフィンとを有する。従って、下流側コア４２に流れこんだ液相冷媒は、過冷却されながらヘッダタンク４３に向かう。 The liquid phase refrigerant flows into the header tank 41 from the connection flow path 12, and the liquid phase refrigerant flows into the downstream core 42 from the header tank 41. The downstream core 42 is a portion that exchanges heat between the refrigerant flowing inside and the air flowing outside, and includes a tube through which the refrigerant passes and fins provided between the tubes. Accordingly, the liquid-phase refrigerant that has flowed into the downstream core 42 is directed to the header tank 43 while being supercooled.
　下流側コア４２からヘッダタンク４３に流れ込んだ液相冷媒は、流出流路１４に流出する。流出流路１４は、冷凍サイクル装置を構成する膨張弁に繋がっており、膨張弁より先にはエバポレータが繋がれている。 The liquid refrigerant that has flowed into the header tank 43 from the downstream core 42 flows out to the outflow passage 14. The outflow channel 14 is connected to an expansion valve that constitutes the refrigeration cycle apparatus, and an evaporator is connected before the expansion valve.
　貯液器５の上方には、冷媒調整部としての第１調整部２１及び第２調整部２２が設けられている。第１調整部２１には、高圧冷媒流入口２１ａと、冷媒流出口２１ｂとが設けられている。高圧冷媒流入口２１ａは、コンプレッサや放熱手段から流れ込む高圧冷媒が流路１７を通して流入する流入口である。冷媒流出口２１ｂは、流入した冷媒をそのまま高圧で若しくは低圧にして、流入流路１５を通して上流側熱交換部３に向けて流出させる流出口である。 A first adjusting unit 21 and a second adjusting unit 22 as a refrigerant adjusting unit are provided above the liquid reservoir 5. The first adjustment unit 21 is provided with a high-pressure refrigerant inlet 21a and a refrigerant outlet 21b. The high-pressure refrigerant inlet 21 a is an inlet through which high-pressure refrigerant flowing from the compressor or the heat radiating means flows through the flow path 17. The refrigerant outlet 21b is an outlet through which the refrigerant that has flowed in is directly brought into a high pressure or a low pressure and flows out toward the upstream heat exchange unit 3 through the inflow channel 15.
　第２調整部２２には、気相冷媒流入口２２ａと、コンプレッサ行き流出口２２ｂとが設けられている。気相冷媒流入口２２ａは、貯液器５から接続流路１３を通して流出する気相冷媒が流入する流入口である。コンプレッサ行き流出口２２ｂは、流入した冷媒を、コンプレッサ行き流路１６を通してコンプレッサに送り出す流出口である。 The second adjusting unit 22 includes a gas-phase refrigerant inlet 22a and a compressor outlet 22b. The gas-phase refrigerant inlet 22a is an inlet through which the gas-phase refrigerant flowing out from the reservoir 5 through the connection channel 13 flows. The compressor outlet 22b is an outlet for sending the refrigerant flowing into the compressor through the compressor passage 16.
　上記したように、第１実施形態に係る熱交換器２は、内部を通過する冷媒と空気とを熱交換させる上流側熱交換部３及び下流側熱交換部４と、上流側熱交換部３から流出した気液二相冷媒を気相冷媒と液相冷媒とに気液分離し、液相冷媒を溜める貯液器５と、冷凍サイクルを構成する冷媒流路を通って流入する冷媒の流動状態を調整して上流側熱交換部３に供給し、下流側熱交換部４又は貯液器５から流出する冷媒の流出状態及び流出先を調整する冷媒調整部としての第１調整部２１及び第２調整部２２と、を備える。貯液器５には、主に液相冷媒が溜まる貯液領域５１ａと、主に気相冷媒が溜まる貯気領域５１ｂとが形成されている。冷媒調整部である第１調整部２１及び第２調整部２２は、貯気領域５１ｂを挟んで貯液領域５１ａとは反対側に設けられている。 As described above, the heat exchanger 2 according to the first embodiment includes the upstream heat exchange unit 3 and the downstream heat exchange unit 4 that exchange heat between the refrigerant passing through the interior and the air, and the upstream heat exchange unit 3. The gas-liquid two-phase refrigerant flowing out from the gas-liquid is separated into a gas-phase refrigerant and a liquid-phase refrigerant, and the flow of the refrigerant flowing in through the reservoir 5 for storing the liquid-phase refrigerant and the refrigerant flow path constituting the refrigeration cycle A first adjusting unit 21 as a refrigerant adjusting unit that adjusts the state and supplies the upstream heat exchanging unit 3 to the upstream heat exchanging unit 3 and adjusts the outflow state and the outflow destination of the refrigerant flowing out of the downstream heat exchanging unit 4 or the reservoir 5; A second adjustment unit 22. The liquid reservoir 5 is formed with a liquid storage region 51a in which mainly liquid phase refrigerant is stored and an air storage region 51b in which mainly gas phase refrigerant is stored. The 1st adjustment part 21 and the 2nd adjustment part 22 which are refrigerant | coolant adjustment parts are provided in the opposite side to the liquid storage area | region 51a on both sides of the air storage area | region 51b.
　このように、第１調整部２１及び第２調整部２２を、貯液器５よりも上方に配置することで、第１調整部２１及び第２調整部２２が水を被る恐れを確実に低減することができる。更に、冷媒調整部である第１調整部２１及び第２調整部２２が貯気領域５１ｂを挟んで貯液領域５１ａとは反対側に配置されているので、冷媒調整部に起因する熱害によって液相冷媒の一部がガス化しても、貯液領域５１ａからのガス冷媒の流出を抑制することができる。加えて、気相冷媒の流出経路を大径化し且つ短く構成することが可能となり、圧力損失の抑制と車両搭載性の確保とを両立させることができる。 Thus, by arranging the first adjustment unit 21 and the second adjustment unit 22 above the liquid reservoir 5, it is possible to reliably reduce the risk of the first adjustment unit 21 and the second adjustment unit 22 receiving water. can do. Furthermore, since the first adjustment unit 21 and the second adjustment unit 22 that are refrigerant adjustment units are disposed on the opposite side of the liquid storage region 51a across the air storage region 51b, the heat adjustment caused by the refrigerant adjustment unit causes Even if a part of the liquid-phase refrigerant is gasified, the outflow of the gas refrigerant from the liquid storage region 51a can be suppressed. In addition, the outflow path of the gas-phase refrigerant can be increased in diameter and shortened, and both suppression of pressure loss and securing of vehicle mounting properties can be achieved.
　貯気領域５１ｂは、液溜部５１の高さ方向の半分以上の位置に配置される。図３に示されるように、貯液器５の高さは、「経年漏れ」「負荷変動吸収」「余裕等」を積み上げることで設定されている。「経年漏れ」とは、熱交換器２が冷凍サイクルに用いられた場合に、使用年数によって各部から漏れ出す冷媒量を想定し、その分を見込んでいるものである。「負荷変動吸収」とは、冷凍サイクルを運転するにあたって、流入する液相冷媒の量の変動量を見込んだものである。「経年漏れ」及び「負荷変動吸収」分は、貯液器５の設計上必要となる液面高さであるので、接続流路１２は、この高さよりも上方に設けられることが好ましい。 The gas storage area 51b is arranged at a position that is at least half of the liquid reservoir 51 in the height direction. As shown in FIG. 3, the height of the liquid reservoir 5 is set by accumulating “leakage over time”, “absorption of load fluctuation”, and “margin”. “Aging leakage” is the amount of refrigerant that leaks from each part according to the number of years of use when the heat exchanger 2 is used in a refrigeration cycle, and anticipates that amount. “Load fluctuation absorption” is intended to allow for fluctuations in the amount of liquid-phase refrigerant that flows in when operating the refrigeration cycle. Since “aging leak” and “load fluctuation absorption” are the liquid level height required for the design of the liquid reservoir 5, it is preferable that the connection flow path 12 is provided above this height.
　図４に示されるように、第２実施形態に係る熱交換器２Ａでは、第１調整部２１Ａ及び第２調整部２２Ａをオフセットさせて、貯液器５の上方に配置している。接続流路１３Ａをクランク状にして設け、流入流路１５Ａを延伸することで、貯液器５の直上でなくとも第１調整部２１Ａ及び第２調整部２２Ａを配置することができる。 As shown in FIG. 4, in the heat exchanger 2A according to the second embodiment, the first adjustment unit 21A and the second adjustment unit 22A are offset and arranged above the liquid reservoir 5. By providing the connecting flow path 13A in a crank shape and extending the inflow flow path 15A, the first adjusting portion 21A and the second adjusting portion 22A can be arranged not directly above the reservoir 5.
　また本実施形態では、上流側熱交換部３から流出する気液二相冷媒を貯液器５に流入させる接続流路１１を備えている。接続流路１１は、貯気領域５１ｂに設けられてなる流入口５０１に連通するように繋がれている。このような構成により、冷房時に高温の冷媒が通る第１調整部２１からの熱害に対して、上流側熱交換部３において熱交換した冷媒を供給することで、その熱害の影響を低減することができる。熱害の影響の低減により、貯液器５の充填特性を向上させることができる。また、暖房時には、気液分離性を向上させることができる。 Moreover, in this embodiment, the connection flow path 11 is provided for allowing the gas-liquid two-phase refrigerant flowing out from the upstream heat exchange section 3 to flow into the liquid reservoir 5. The connection flow path 11 is connected to communicate with an inflow port 501 provided in the air storage region 51b. With such a configuration, the influence of the heat damage is reduced by supplying the heat exchanged heat in the upstream heat exchange unit 3 against the heat damage from the first adjustment unit 21 through which the high-temperature refrigerant passes during cooling. can do. By reducing the influence of heat damage, the filling characteristics of the liquid reservoir 5 can be improved. In addition, gas-liquid separation can be improved during heating.
　また本実施形態では、貯液器５及び冷媒調整部としての第１調整部２１及び第２調整部２２は、上流側熱交換部３及び下流側熱交換部４の冷媒流れ方向における一端側に配置されている。このように配置することで、配管経路を短くし、冷媒の圧損増加を抑制することができる。 Moreover, in this embodiment, the 1st adjustment part 21 and the 2nd adjustment part 22 as the reservoir 5 and a refrigerant | coolant adjustment part are the one end side in the refrigerant | coolant flow direction of the upstream heat exchange part 3 and the downstream heat exchange part 4. Has been placed. By arranging in this way, the piping path can be shortened and an increase in refrigerant pressure loss can be suppressed.
　また本実施形態では、冷媒調整部である第１調整部２１及び第２調整部２２から貯液器５を見た場合にそれぞれの一部が重複するように、第１調整部２１及び第２調整部２２と貯液器５が配置されている。より具体的には、貯液器５の長手方向を見通す方向から見た場合、すなわち貯液器５の長手方向に対し上方又は下方から第１調整部２１及び第２調整部２２と貯液器５とを見た場合に、それぞれの一部が重複するように配置されている。このように配置することで、省スペース化が実現できる。もっとも、図１及び図２を参照しながら説明したように、第１調整部２１及び第２調整部２２と貯液器５とが完全に重複するように配置することに実施形態は限られない。 Moreover, in this embodiment, when the reservoir 5 is seen from the 1st adjustment part 21 and the 2nd adjustment part 22 which are refrigerant | coolant adjustment parts, 1st adjustment part 21 and 2nd so that each may overlap. The adjustment unit 22 and the liquid reservoir 5 are arranged. More specifically, when viewed from the direction in which the longitudinal direction of the liquid reservoir 5 is seen, that is, from the upper side or the lower side with respect to the longitudinal direction of the liquid reservoir 5, the first adjusting unit 21, the second adjusting unit 22, and the liquid reservoir. When looking at 5, they are arranged so that a part of each overlaps. By arranging in this way, space saving can be realized. However, as described with reference to FIG. 1 and FIG. 2, the embodiment is not limited to arranging the first adjustment unit 21 and the second adjustment unit 22 and the liquid reservoir 5 so as to completely overlap. .
　図５に示されるように、第３実施形態に係る熱交換器２Ｂは、第１調整部２１Ｂ及び第２調整部２２Ｂが横方向に沿って並ぶように配置されている。第１調整部２１Ｂには流路１７Ｂが繋がれており、ヘッダタンク３１の直上に配置されている。第１調整部２１Ｂとヘッダタンク３１とは、極めて短い流入流路１５Ｂによって繋がれている。第２調整部２２Ｂは、貯液器５の直上に配置されている。貯液器５と第２調整部２２Ｂとの距離が長くなるので、接続流路１３Ｂが延伸される。 As shown in FIG. 5, the heat exchanger 2 </ b> B according to the third embodiment is arranged such that the first adjustment unit 21 </ b> B and the second adjustment unit 22 </ b> B are arranged in the horizontal direction. A flow path 17B is connected to the first adjustment unit 21B and is disposed immediately above the header tank 31. The first adjustment unit 21B and the header tank 31 are connected by an extremely short inflow channel 15B. The second adjustment unit 22 </ b> B is disposed immediately above the liquid reservoir 5. Since the distance between the liquid reservoir 5 and the second adjustment unit 22B is increased, the connection flow path 13B is extended.
　また本実施形態では、冷媒調整部である第１調整部２１及び第２調整部２２には、上流側熱交換部３に冷媒を流出する接続流路１３Ｂが繋がれると共に、冷凍サイクルを構成するコンプレッサへ冷媒を流出するコンプレッサ行き流路１６Ｂが繋がれている。 In the present embodiment, the first adjusting unit 21 and the second adjusting unit 22 that are refrigerant adjusting units are connected to the upstream side heat exchanging unit 3 through the connection flow path 13B for flowing out the refrigerant, and constitute a refrigeration cycle. A flow path 16B for the compressor that flows out the refrigerant to the compressor is connected.
　図６に示されるように、第４実施形態に係る熱交換器２Ｃは、貯液器５の貯液領域５１ａから流出する液相冷媒がコンプレッサ行き流出口２２ｂから流出する冷媒と合流するように構成されている。より具体的には、貯液器５の下部と、接続流路１３とを繋ぐ接続流路１２Ｃが設けられている。 As shown in FIG. 6, the heat exchanger 2 </ b> C according to the fourth embodiment is configured so that the liquid-phase refrigerant flowing out from the liquid storage region 51 a of the liquid storage device 5 merges with the refrigerant flowing out from the compressor outlet / outlet 22 b. It is configured. More specifically, a connection channel 12 </ b> C that connects the lower part of the liquid reservoir 5 and the connection channel 13 is provided.
　また本実施形態では、流れこんだ冷媒を空気と熱交換させて貯液器５に送り出す上流側熱交換部３と、貯液器５から流出した液相冷媒が流れ込み、空気と熱交換させる下流側熱交換部４と、を有している。貯液器５と、冷媒調整部である第１調整部２１及び第２調整部２２と、上流側熱交換部３と、下流側熱交換部４と、が一体的に結合されている。 Moreover, in this embodiment, the upstream heat exchange part 3 which heat-exchanges the refrigerant | coolant which flowed in and sends it to the reservoir 5 and the downstream which the liquid phase refrigerant | coolant which flowed out from the reservoir 5 flows in and heat-exchanges with air. Side heat exchanging section 4. The reservoir 5, the first adjusting unit 21 and the second adjusting unit 22 that are refrigerant adjusting units, the upstream heat exchanging unit 3, and the downstream heat exchanging unit 4 are integrally coupled.
　また本実施形態では、第１調整部２１は、コンプレッサから流れ込む高圧冷媒が流入する高圧冷媒流入口２１ａと、冷媒流出口２１ｂとの間に設けられ、流路を開閉する機能と冷媒の圧力を低下させる機能とを有する。第２調整部２２は、貯液器５から流れ込む気相冷媒が流入する気相冷媒流入口２２ａと、コンプレッサ行き流出口２２ｂとの間に設けれ、流路を開閉する機能を有する。第２調整部２２を挟んで、第１調整部２１と貯液器５とが互いに反対側に位置するように設けられている。第２調整部２２を貯液器５側に配置することで、貯気領域５１ｂから最短距離で気相冷媒流入口２２ａを配置することができるため、気相冷媒の圧損低減が図れる。高温冷媒が流れる第１調整部を貯液器５から引き離すことで、熱害による充填率低下を避けることができる。また、このように配置することで、高圧冷媒の流れる第１調整部２１からの熱を第２調整部２２で緩和することができるので、貯液器５上部のガス化を抑制できると共に気液分離性を確保できる。 Moreover, in this embodiment, the 1st adjustment part 21 is provided between the high pressure refrigerant | coolant inflow port 21a into which the high pressure refrigerant | coolant which flows in from a compressor flows in, and the refrigerant | coolant outflow port 21b, and has the function which opens and closes a flow path, and the pressure of a refrigerant | coolant. It has a function to lower. The 2nd adjustment part 22 is provided between the gaseous-phase refrigerant | coolant inlet 22a into which the gaseous-phase refrigerant | coolant which flows in from the reservoir 5 flows in, and the compressor outlet / outlet 22b, and has a function which opens and closes a flow path. The first adjustment unit 21 and the liquid reservoir 5 are provided on opposite sides of the second adjustment unit 22. By disposing the second adjustment unit 22 on the liquid reservoir 5 side, the gas-phase refrigerant inlet 22a can be disposed at the shortest distance from the air-storage region 51b, so that the pressure loss of the gas-phase refrigerant can be reduced. By pulling away the first adjusting portion through which the high-temperature refrigerant flows from the liquid reservoir 5, it is possible to avoid a decrease in the filling rate due to heat damage. Moreover, since the heat from the 1st adjustment part 21 into which a high pressure refrigerant | coolant flows can be relieve | moderated by the 2nd adjustment part 22 by arrange | positioning in this way, gasification of the upper part of the reservoir 5 can be suppressed, and gas liquid Separability can be secured.
　図７に示されるように、第５実施形態に係る熱交換器２Ｄは、上流側熱交換部３と、下流側熱交換部４と、貯液器５と、を備えている。上流側熱交換部３は、２つの上流側コア３２，３４と、ヘッダタンク３１，３３，３５と、を有している。本実施形態では一例として２つの上流側コア３２，３４を有するものを示したが、コアは単一でも３つ以上でも構わない。上流側コア３２，３４は、内部を流れる冷媒と外部を流れる空気との間で熱交換をする部分であって、冷媒が通るチューブと、チューブ間に設けられたフィンとを有する。 As shown in FIG. 7, the heat exchanger 2D according to the fifth embodiment includes an upstream heat exchange unit 3, a downstream heat exchange unit 4, and a liquid reservoir 5. The upstream heat exchange unit 3 includes two upstream cores 32 and 34 and header tanks 31, 33, and 35. In the present embodiment, an example having two upstream cores 32 and 34 is shown, but the number of cores may be single or three or more. The upstream cores 32 and 34 are portions for exchanging heat between the refrigerant flowing inside and the air flowing outside, and have tubes through which the refrigerant passes and fins provided between the tubes.
　上流側コア３２の上流側端には、ヘッダタンク３１が取り付けられている。上流側コア３４の下流側端には、ヘッダタンク３５が取り付けられている。上流側コア３２の下流側端及び上流側コア３４の上流側端には、双方に跨って配置されるヘッダタンク３３が取り付けられている。 A header tank 31 is attached to the upstream end of the upstream core 32. A header tank 35 is attached to the downstream end of the upstream core 34. A header tank 33 is attached to the downstream end of the upstream core 32 and the upstream end of the upstream core 34 so as to extend over both.
　ヘッダタンク３１には流入流路１５が設けられている。ヘッダタンク３５には接続流路１１が設けられている。流入流路１５から流入した冷媒は、ヘッダタンク３１から上流側コア３２に流入する。上流側コア３２を流れた冷媒は、ヘッダタンク３３に流入する。ヘッダタンク３３内を流れた冷媒は、上流側コア３４に流入する。上流側コア３４を流れた冷媒は、ヘッダタンク３５に流入する。ヘッダタンク３５に流入した冷媒は、接続流路１１に流出する。接続流路１１は貯液器５に繋がれている。 The inlet tank 15 is provided in the header tank 31. A connection channel 11 is provided in the header tank 35. The refrigerant flowing in from the inflow channel 15 flows into the upstream core 32 from the header tank 31. The refrigerant that has flowed through the upstream core 32 flows into the header tank 33. The refrigerant that has flowed through the header tank 33 flows into the upstream core 34. The refrigerant that has flowed through the upstream core 34 flows into the header tank 35. The refrigerant flowing into the header tank 35 flows out to the connection flow path 11. The connection flow path 11 is connected to the liquid reservoir 5.
　貯液器５は、液溜部５１と、接続流路１１と、接続流路１２と、接続流路１３と、を有している。液溜部５１は、接続流路１１から流入する気液二相冷媒を液相冷媒と気相冷媒とに分離し、液相冷媒を溜める部分である。 The liquid reservoir 5 has a liquid reservoir 51, a connection channel 11, a connection channel 12, and a connection channel 13. The liquid reservoir 51 is a part that separates the gas-liquid two-phase refrigerant flowing from the connection flow path 11 into a liquid-phase refrigerant and a gas-phase refrigerant and accumulates the liquid-phase refrigerant.
　液溜部５１には、接続流路１１と、接続流路１２と、接続流路１３と、が繋がれている。接続流路１１は、上流側熱交換部３と貯液器５とを繋ぐ流路である。接続流路１２は、貯液器５と下流側熱交換部４とを繋ぐ流路である。接続流路１２から流出した液相冷媒は、下流側熱交換部４に流入する。接続経路１３は、貯液器５と冷媒調整部６とを繋ぐ通路である。 The connecting channel 11, the connecting channel 12, and the connecting channel 13 are connected to the liquid reservoir 51. The connection flow path 11 is a flow path that connects the upstream heat exchange unit 3 and the liquid reservoir 5. The connection flow path 12 is a flow path that connects the liquid reservoir 5 and the downstream heat exchange unit 4. The liquid-phase refrigerant that has flowed out of the connection flow path 12 flows into the downstream heat exchange unit 4. The connection path 13 is a path that connects the liquid reservoir 5 and the refrigerant adjustment unit 6.
　液溜部５１には、貯液空間５１１が形成されている。貯液空間５１１に繋がるように、流入口５１２及び流出口５１３が形成されている。流入口５１２には、接続流路１１が繋がれている。流出口５１３には、接続流路１２が繋がれている。 A liquid storage space 511 is formed in the liquid reservoir 51. An inlet 512 and an outlet 513 are formed so as to be connected to the liquid storage space 511. The connection channel 11 is connected to the inflow port 512. The connection channel 12 is connected to the outflow port 513.
　貯液器５の上方には、冷媒調整部６が設けられている。冷媒調整部６には、流入流路１７と、流入流路１５とが繋がれている。流入流路１７は、コンプレッサから流れ込む高圧冷媒が流入する流路である。流入流路１５は、流入した冷媒をそのまま高圧で若しくは低圧にして、上流側熱交換部３に向けて流出させる流路である。 A refrigerant adjustment unit 6 is provided above the liquid reservoir 5. An inflow channel 17 and an inflow channel 15 are connected to the refrigerant adjustment unit 6. The inflow channel 17 is a channel into which high-pressure refrigerant flowing from the compressor flows. The inflow channel 15 is a channel through which the refrigerant that has flowed in is kept at a high pressure or a low pressure and flows out toward the upstream heat exchange unit 3.
　冷媒調整部６には、接続流路１３と、コンプレッサ行き流路１６とが繋がれている。接続流路１３は、貯液器５から流出する気相冷媒が流入する流路である。コンプレッサ行き流路１６は、流入した冷媒をコンプレッサに送り出す流路である。 The refrigerant flow adjustment section 6 is connected to a connection flow path 13 and a flow path 16 for the compressor. The connection flow path 13 is a flow path into which the gas-phase refrigerant flowing out from the liquid reservoir 5 flows. The compressor-bound flow path 16 is a flow path for sending the refrigerant flowing in to the compressor.
　冷媒調整部６は、内部流路が形成され、弁体及び弁座が配置されている本体部６１と、シール部６３と、弁体を駆動するアクチュエータ６４と、を備えている。 The refrigerant adjustment unit 6 includes a main body part 61 in which an internal flow path is formed and a valve body and a valve seat are arranged, a seal part 63, and an actuator 64 that drives the valve body.
　接続流路１１に流出した冷媒は、流入口５１２を経由して、冷媒調整部６の緩衝領域６６に流入する。緩衝領域６６は、接続流路１３の上方に形成されている。流入口５１２から流入する冷媒が緩衝領域６６に流れ込むことができるように、連通穴６７が設けられている。連通穴６７は、本体部６１が流入口５１２に対向する箇所に設けられている。 The refrigerant that has flowed out into the connection flow path 11 flows into the buffer region 66 of the refrigerant adjustment unit 6 via the inflow port 512. The buffer region 66 is formed above the connection flow path 13. A communication hole 67 is provided so that the refrigerant flowing from the inlet 512 can flow into the buffer region 66. The communication hole 67 is provided at a location where the main body portion 61 faces the inflow port 512.
　流入口５１２から流入する冷媒は、緩衝領域６６に流れ込む。接続流路１１から流入する液冷媒により接続流路１７から接続流路１５を通るＳＨガスによる熱害を冷やすことができるため、貯液空間上部のガス化を抑制でき、気液分離性を確保することができる。 The refrigerant flowing from the inlet 512 flows into the buffer region 66. The liquid refrigerant flowing from the connection channel 11 can cool the heat damage caused by the SH gas passing from the connection channel 17 to the connection channel 15, thereby suppressing gasification in the upper part of the liquid storage space and ensuring gas-liquid separation. can do.
　下流側熱交換部４は、ヘッダタンク４１と、下流側コア４２と、ヘッダタンク４３と、を有している。ヘッダタンク４３には、流出流路１４が繋がれている。ヘッダタンク４３は、下流側コア４２の下流側端に設けられている。下流側コア４２の上流側端には、ヘッダタンク４１が設けられている。ヘッダタンク４１には、接続流路１２が繋がれている。 The downstream heat exchange unit 4 includes a header tank 41, a downstream core 42, and a header tank 43. An outflow channel 14 is connected to the header tank 43. The header tank 43 is provided at the downstream end of the downstream core 42. A header tank 41 is provided at the upstream end of the downstream core 42. A connection channel 12 is connected to the header tank 41.
　接続流路１２からヘッダタンク４１に液相冷媒が流入し、ヘッダタンク４１から下流側コア４２に液相冷媒が流入する。下流側コア４２は、内部を流れる冷媒と外部を流れる空気との間で熱交換をする部分であって、冷媒が通るチューブと、チューブ間に設けられたフィンとを有する。従って、下流側コア４２に流れこんだ液相冷媒は、過冷却されながらヘッダタンク４３に向かう。 The liquid phase refrigerant flows into the header tank 41 from the connection flow path 12, and the liquid phase refrigerant flows into the downstream core 42 from the header tank 41. The downstream core 42 is a portion that exchanges heat between the refrigerant flowing inside and the air flowing outside, and includes a tube through which the refrigerant passes and fins provided between the tubes. Accordingly, the liquid-phase refrigerant that has flowed into the downstream core 42 is directed to the header tank 43 while being supercooled.
　下流側コア４２からヘッダタンク４３に流れ込んだ液相冷媒は、流出流路１４に流出する。流出流路１４は、冷凍サイクル装置を構成する膨張弁に繋がっており、膨張弁より先にはエバポレータが繋がれている。 The liquid refrigerant that has flowed into the header tank 43 from the downstream core 42 flows out to the outflow passage 14. The outflow channel 14 is connected to an expansion valve that constitutes the refrigeration cycle apparatus, and an evaporator is connected before the expansion valve.
　上記したように、本実施形態では、冷媒調整部６は、貯液領域である貯液空間５１１の上方に設けられている。また、上流側熱交換部３から貯液領域である貯液空間５１１へ至る冷媒の流入経路は、冷媒調整部６を経由するように構成されている。 As described above, in the present embodiment, the refrigerant adjustment unit 6 is provided above the liquid storage space 511 that is a liquid storage region. In addition, the refrigerant inflow path from the upstream heat exchange unit 3 to the liquid storage space 511 that is the liquid storage region is configured to pass through the refrigerant adjustment unit 6.
　冷媒調整部６を貯液空間５１１の上方に配置し、なんらの対策も取らないと、暖房運転時に液冷媒が貯液空間５１１の下方に停滞し、冷凍サイクル内を循環する冷媒量が減少してしまう恐れがある。冷媒量の減少は、暖房性能の低下や循環オイル量の低下に繋がる。循環オイル量の低下が進行すると、コンプレッサがロックしてしまう恐れがある。そこで、熱交換部３から貯液空間５１１へ至る冷媒の流入流路を、冷媒調整部６を経由させることで、暖房時に冷媒を貯液空間５１１に流さずに冷凍サイクル内に還流させることができる。 If the refrigerant adjusting unit 6 is disposed above the liquid storage space 511 and no measures are taken, the liquid refrigerant stagnates below the liquid storage space 511 during heating operation, and the amount of refrigerant circulating in the refrigeration cycle decreases. There is a risk that. A decrease in the refrigerant amount leads to a decrease in heating performance and a decrease in the amount of circulating oil. If the circulating oil amount decreases, the compressor may be locked. Therefore, the refrigerant inflow path from the heat exchange unit 3 to the liquid storage space 511 is routed through the refrigerant adjustment unit 6 so that the refrigerant can be recirculated into the refrigeration cycle without flowing into the liquid storage space 511 during heating. it can.
　また本実施形態では、流入口５１２に繋がり、上流側熱交換部３から流出する冷媒を貯液領域である貯液空間５１１に流入させる接続流路１１と、流出口５１３に繋がり、熱交換部３から流出し貯液領域である貯液空間５１１に入った冷媒を熱交換部４に流出させる接続流路１２とが設けられており、流入口５１２よりも流出口５１３が下方に配置されている。流入口５１２は、貯液領域である貯液空間５１１の上方に配置されている、 Moreover, in this embodiment, it connects with the inflow port 512, connects with the connection flow path 11 into which the refrigerant | coolant which flows out out of the upstream heat exchange part 3 flows in into the liquid storage space 511 which is a liquid storage area | region, and the outflow port 513, and is connected to a heat exchange part. 3 is provided with a connection flow path 12 through which the refrigerant flowing out from 3 and entering the liquid storage space 511, which is a liquid storage area, flows out to the heat exchanging section 4, and the outlet 513 is disposed below the inlet 512. Yes. The inflow port 512 is disposed above the liquid storage space 511 that is a liquid storage area.
　このように構成することで、冷媒調整部６を通ることで高温となった冷媒が一部ガス化しても、流出口５１３に至るまでに冷却されるので、ガスが含まれた冷媒が熱交換部４に至らないようにすることができる。一方、図８に示す比較例の熱交換器２Ｅでは、冷媒調整部６Ｅを下方に配置しているので、弁６８Ｅが高温となった場合に、ガスが含まれた冷媒が熱交換部４に流れることになる。このようなガス流入の影響を低減するため、本実施形態のように冷媒調整部６を上方に配置することが好ましい。 With this configuration, even if a part of the refrigerant that has become hot due to passing through the refrigerant adjustment unit 6 is gasified, the refrigerant is cooled down to the outlet 513, so that the refrigerant containing the gas exchanges heat. It is possible not to reach part 4. On the other hand, in the heat exchanger 2E of the comparative example shown in FIG. 8, the refrigerant adjustment unit 6E is disposed below. Will flow. In order to reduce the influence of such gas inflow, it is preferable to arrange the refrigerant adjustment unit 6 upward as in the present embodiment.
　図９に示される第６実施形態に係る熱交換器２Ｇは、熱交換器２Ｄの構成に対して、更に、液冷媒が上方から流入することによる前記貯液器内の液面乱れを抑制するための導管６８Ｇを備えている。導管６８Ｇの下端６８１Ｇは、流出口５１３よりも下方に位置するように配置されている。 The heat exchanger 2G according to the sixth embodiment shown in FIG. 9 further suppresses the liquid level disturbance in the liquid reservoir due to the liquid refrigerant flowing from above with respect to the configuration of the heat exchanger 2D. A conduit 68G is provided. The lower end 681G of the conduit 68G is arranged to be positioned below the outflow port 513.
　冷媒調整部６Ｆを構成する本体部６１Ｇには、緩衝領域６６Ｇが設けられている。流入口５１２から流入する冷媒が緩衝領域６６Ｇに流れ込むことができるように、連通穴６７Ｇが設けられている。連通穴６７Ｇは、本体部６１Ｇが流入口５１２に対向する箇所に設けられている。 A buffer region 66G is provided in the main body 61G constituting the refrigerant adjustment unit 6F. A communication hole 67G is provided so that the refrigerant flowing from the inlet 512 can flow into the buffer region 66G. The communication hole 67G is provided at a location where the main body 61G faces the inflow port 512.
　本体部６１Ｇの緩衝領域６６Ｇ下方には、開口部６８２Ｇが設けられている。開口部６８２Ｇを貫通するように、導管６８Ｇが配置されている。暖房運転の場合、弁体６９Ｇが下降し、導管６８Ｇを塞ぐようになる。弁体６９Ｇには、戻り穴６９１Ｇが設けられているので、下端６８１Ｇに設けられた開口から上昇した冷媒は、戻り穴６９１Ｇを通って冷凍サイクルに還流する。 An opening 682G is provided below the buffer region 66G of the main body 61G. A conduit 68G is disposed so as to penetrate through the opening 682G. In the case of the heating operation, the valve body 69G is lowered to block the conduit 68G. Since the return hole 691G is provided in the valve body 69G, the refrigerant rising from the opening provided in the lower end 681G returns to the refrigeration cycle through the return hole 691G.
　図１０に示される熱交換器２Ｈでは、シール部６３を用いずに空隙部６５Ｈが設けられている。空隙部６５Ｈは、本体部６１Ｈの一部を後退させることで、空隙部６５Ｈを形成している。ところで、ガス化領域を低減する観点から流入口５１２の接続位置を上方に設定すると、図１０に示されるように、冷媒が滝状に流入し、貯液空間５１１内の液面が乱れる課題が発生する。 In the heat exchanger 2H shown in FIG. 10, the gap portion 65H is provided without using the seal portion 63. The gap portion 65H forms a gap portion 65H by retracting a part of the main body portion 61H. By the way, when the connection position of the inflow port 512 is set upward from the viewpoint of reducing the gasification region, as shown in FIG. 10, the refrigerant flows in a waterfall shape and the liquid level in the liquid storage space 511 is disturbed. appear.
　そこで、液面乱れの課題を解決するための第７実施形態に係る熱交換器２Ｊについて、図１１を参照しながら説明する。熱交換器２Ｊは、貯液器５Ｊ及び冷媒調整部６Ｊを備えている。冷媒調整部６Ｊには、緩衝領域６６Ｊが形成されている。 Therefore, a heat exchanger 2J according to a seventh embodiment for solving the problem of liquid level disturbance will be described with reference to FIG. The heat exchanger 2J includes a liquid reservoir 5J and a refrigerant adjustment unit 6J. A buffer region 66J is formed in the refrigerant adjustment unit 6J.
　緩衝領域６６Ｊは、流出流路１３Ｊの上方に形成されている。流入口５１２から流入する冷媒が緩衝領域６６Ｊに流れ込むことができるように、連通穴６７が設けられている。連通穴６７は、本体部６１Ｊが流入口５１２に対向する箇所に設けられている。 The buffer region 66J is formed above the outflow channel 13J. A communication hole 67 is provided so that the refrigerant flowing in from the inflow port 512 can flow into the buffer region 66J. The communication hole 67 is provided at a location where the main body portion 61J faces the inflow port 512.
　流入口５１２から流入する冷媒は、緩衝領域６６Ｊに流れ込む。緩衝領域６６Ｊに一時的に貯留された冷媒は、流出流路１３Ｊから貯液空間５１１に流れ落ちる。そのため、冷媒の落下が穏やかなものとなり、液面乱れが低減される。 The refrigerant flowing from the inlet 512 flows into the buffer region 66J. The refrigerant temporarily stored in the buffer region 66J flows down from the outflow passage 13J to the liquid storage space 511. Therefore, the refrigerant falls gently, and the liquid level disturbance is reduced.
　続いて、液面乱れの課題を解決するための熱交換器２Ｆについて、図１２を参照しながら説明する。熱交換器２Ｋは、貯液器５Ｋを備えている。貯液器５Ｋには、緩衝領域６６Ｋが形成されている。 Subsequently, a heat exchanger 2F for solving the problem of liquid level disturbance will be described with reference to FIG. The heat exchanger 2K includes a liquid reservoir 5K. A buffer region 66K is formed in the liquid reservoir 5K.
　緩衝領域６６Ｋは、冷媒調整部６と緩衝板５２Ｋａとの間に形成されている。緩衝板５２Ｋａは、貯液空間５１１内に配置されている板状部材である。図１３に示されるように、緩衝板５２Ｋａには、複数の貫通穴５２１ａが設けられている。図１４に示されるように、単一の貫通穴５２１ｂが設けられた緩衝板５２Ｋｂを用いることもできる。図１５に示されるように、液溜部５１の内壁との間に隙間を形成するように、側面に凹部５２１ｃを設けた緩衝板５２Ｋｃを用いることもできる。緩衝板５２Ｋｃを用いると、冷媒は液溜部５１の内壁面を伝って流れるので、液面乱れの抑制効果が高まる。 The buffer region 66K is formed between the refrigerant adjustment unit 6 and the buffer plate 52Ka. The buffer plate 52Ka is a plate-like member disposed in the liquid storage space 511. As shown in FIG. 13, the buffer plate 52Ka is provided with a plurality of through holes 521a. As shown in FIG. 14, a buffer plate 52Kb provided with a single through hole 521b can also be used. As shown in FIG. 15, a buffer plate 52 </ b> Kc having a recess 521 c on the side surface may be used so as to form a gap between the inner wall of the liquid reservoir 51. When the buffer plate 52Kc is used, the refrigerant flows along the inner wall surface of the liquid reservoir 51, so that the effect of suppressing the liquid level disturbance is enhanced.
　以上、具体例を参照しつつ本実施形態について説明した。しかし、本開示はこれらの具体例に限定されるものではない。これら具体例に、当業者が適宜設計変更を加えたものも、本開示の特徴を備えている限り、本開示の範囲に包含される。前述した各具体例が備える各要素およびその配置、条件、形状などは、例示したものに限定されるわけではなく適宜変更することができる。前述した各具体例が備える各要素は、技術的な矛盾が生じない限り、適宜組み合わせを変えることができる。 The embodiment has been described above with reference to specific examples. However, the present disclosure is not limited to these specific examples. Those in which those skilled in the art appropriately modify the design of these specific examples are also included in the scope of the present disclosure as long as they have the features of the present disclosure. Each element included in each of the specific examples described above and their arrangement, conditions, shape, and the like are not limited to those illustrated, and can be changed as appropriate. Each element included in each of the specific examples described above can be appropriately combined as long as no technical contradiction occurs.

Claims (18)

  1. 　冷凍サイクルに用いられる熱交換器であって、
    　内部を通過する冷媒と空気とを熱交換させる熱交換部（３，４）と、
    　熱交換部から流出した気液二相冷媒を気相冷媒と液相冷媒とに気液分離し、液相冷媒を溜める貯液器（５）と、
    　前記冷凍サイクルを構成する冷媒流路を通って流入する冷媒の流動状態を調整して前記熱交換部（３）に供給し、前記熱交換部（４）又は前記貯液器（５）から流出する冷媒の流出状態及び流出先を調整する冷媒調整部（２１，２２）と、を備え、
    　前記貯液器には、主に液相冷媒が溜まる貯液領域（５１ａ）と、主に気相冷媒が溜まる貯気領域（５１ｂ）とが形成され、
    　前記冷媒調整部は、前記貯気領域を挟んで前記貯液領域とは反対側に設けられている、熱交換器。     A heat exchanger used in a refrigeration cycle,
    A heat exchange section (3, 4) for exchanging heat between the refrigerant passing through the interior and the air;
    A liquid reservoir (5) for separating the gas-liquid two-phase refrigerant flowing out from the heat exchange section into a gas-phase refrigerant and a liquid-phase refrigerant and storing the liquid-phase refrigerant;
    The flow state of the refrigerant flowing in through the refrigerant flow path constituting the refrigeration cycle is adjusted and supplied to the heat exchange unit (3), and flows out from the heat exchange unit (4) or the liquid reservoir (5). A refrigerant adjusting section (21, 22) for adjusting the outflow state and the outflow destination of the refrigerant to be
    The liquid reservoir is formed with a liquid storage region (51a) mainly storing liquid phase refrigerant and an air storage region (51b) mainly storing gas phase refrigerant,
    The said refrigerant | coolant adjustment part is a heat exchanger provided in the opposite side to the said liquid storage area | region on both sides of the said air storage area | region.
  2. 　請求項１に記載の熱交換器であって、
    　前記冷媒調整部は、前記貯液領域の上方に設けられている、熱交換器。     The heat exchanger according to claim 1,
    The said refrigerant | coolant adjustment part is a heat exchanger provided above the said liquid storage area | region.
  3. 　請求項２に記載の熱交換器であって、
    　前記熱交換部から前記貯液領域へ至る冷媒の流入経路は、前記冷媒調整部を経由する、熱交換器。     The heat exchanger according to claim 2,
    The refrigerant inflow path from the heat exchange unit to the liquid storage region passes through the refrigerant adjustment unit.
  4. 　請求項１から３のいずれか１項に記載の熱交換器であって、
    　更に、流入口（５１２）に繋がり、前記熱交換部から流出する冷媒を前記貯液領域に流入させる接続流路（１１）と、流出口（５１３）に繋がり、前記熱交換部から流出し前記貯液領域に入った冷媒を前記熱交換部に流出させる接続流路（１２）と、を備え、
    　前記流入口よりも前記流出口が下方に配置されており、前記流入口は前記貯液領域の上方に配置されている、熱交換器。     The heat exchanger according to any one of claims 1 to 3,
    Furthermore, it connects to the inflow port (512) and connects to the connection channel (11) for allowing the refrigerant flowing out from the heat exchange part to flow into the liquid storage region, and to the outflow port (513), and flows out from the heat exchange part to A connection channel (12) for allowing the refrigerant that has entered the liquid storage region to flow out to the heat exchange section, and
    The heat exchanger, wherein the outflow port is disposed below the inflow port, and the inflow port is disposed above the liquid storage region.
  5. 　請求項４に記載の熱交換器であって、
    　前記流入口と前記貯液空間の液面との間に、前記流入口から流入する冷媒が直接前記液面に到達することを抑制する緩衝領域（６６Ｊ，６６Ｋ）が設けられている、熱交換器。     The heat exchanger according to claim 4,
    A buffer region (66J, 66K) is provided between the inlet and the liquid level of the liquid storage space to prevent the refrigerant flowing from the inlet from directly reaching the liquid level. vessel.
  6. 　請求項５に記載の熱交換器であって、
    　前記流入口は前記冷媒調整部の内部に連通しており、
    　前記緩衝領域（６６Ｊ）は、前記冷媒調整部の内部に設けられている、熱交換器。     The heat exchanger according to claim 5, wherein
    The inflow port communicates with the inside of the refrigerant adjustment unit,
    The said buffer area | region (66J) is a heat exchanger provided in the inside of the said refrigerant | coolant adjustment part.
  7. 　請求項５に記載の熱交換器であって、
    　前記緩衝領域（６６Ｋ）は、前記流入口と前記一端との間の前記貯液空間に、緩衝板（５２Ｋａ，５２Ｋｂ，５２Ｋｃ）が設けられることで形成されている、熱交換器。     The heat exchanger according to claim 5, wherein
    The buffer region (66K) is a heat exchanger formed by providing a buffer plate (52Ka, 52Kb, 52Kc) in the liquid storage space between the inlet and the one end.
  8. 　請求項７に記載の熱交換器であって、
    　前記緩衝板（５２Ｋａ）には複数の貫通穴（５２１ａ）が設けられている、熱交換器。     The heat exchanger according to claim 7,
    A heat exchanger in which the buffer plate (52Ka) is provided with a plurality of through holes (521a).
  9. 　請求項７に記載の熱交換器であって、
    　前記緩衝板（５２Ｋｃ）の側面に凹部（５２１ｃ）が設けられている、熱交換器。     The heat exchanger according to claim 7,
    A heat exchanger in which a recess (521c) is provided on a side surface of the buffer plate (52Kc).
  10. 　請求項４に記載の熱交換器であって、
    　前記流入口から流入する冷媒を、前記貯液空間に溜められている冷媒の液面よりも下方に導くように延びる導管（６８Ｇ）が設けられている、熱交換器。     The heat exchanger according to claim 4,
    A heat exchanger provided with a conduit (68G) extending so as to guide the refrigerant flowing in from the inflow port below the liquid level of the refrigerant stored in the liquid storage space.
  11. 　請求項１０に記載の熱交換器であって、
    　前記貯液器には、前記貯液空間に溜められている冷媒を流出させる流出口（５１３）が設けられており、
    　前記導管の下端は前記流出口よりも下方に位置するように配置されている、熱交換器。     The heat exchanger according to claim 10, wherein
    The liquid reservoir is provided with an outlet (513) through which the refrigerant stored in the liquid storage space flows out,
    The heat exchanger is arranged such that a lower end of the conduit is positioned below the outlet.
  12. 　請求項１に記載の熱交換器であって、
    　前記貯液器及び前記冷媒調整部は、前記熱交換部の冷媒流れ方向における一端側に配置されている、熱交換器。     The heat exchanger according to claim 1,
    The liquid reservoir and the refrigerant adjustment unit are heat exchangers arranged on one end side in the refrigerant flow direction of the heat exchange unit.
  13. 　請求項１２記載の熱交換器であって、
    　前記貯液器の長手方向を見通す方向から前記貯液器を見た場合にそれぞれの一部が重複するように、前記冷媒調整部及び前記貯液器が配置されている、熱交換器。     The heat exchanger according to claim 12, wherein
    The heat exchanger in which the refrigerant adjusting unit and the liquid reservoir are arranged so that a part of each of the liquid reservoirs overlaps when the liquid reservoir is viewed from a direction looking through the longitudinal direction of the liquid reservoir.
  14. 　請求項１２記載の熱交換器であって、
    　前記冷媒調整部には、前記熱交換部に冷媒を流出する冷媒流出口（２１ｂ）と、前記冷凍サイクルを構成するコンプレッサへ冷媒を流出するコンプレッサ行き流出口（２２ｂ）と、が形成されている、熱交換器。     The heat exchanger according to claim 12, wherein
    The refrigerant adjusting part is formed with a refrigerant outlet (21b) for flowing out the refrigerant to the heat exchanging part and a compressor outlet (22b) for flowing out the refrigerant to the compressor constituting the refrigeration cycle. ,Heat exchanger.
  15. 　請求項１２記載の熱交換器であって、
    　更に、前記貯液器の前記貯気領域と前記冷媒調整部とを繋ぐ流出流路（１３）を備える、熱交換器。     The heat exchanger according to claim 12, wherein
    The heat exchanger further includes an outflow channel (13) that connects the air storage region of the liquid storage unit and the refrigerant adjusting unit.
  16. 　請求項１４記載の熱交換器であって、
    　前記貯液器の前記貯液領域から流出する液相冷媒が前記コンプレッサ行き流出口から流出する冷媒と合流するように構成されている、熱交換器。     The heat exchanger according to claim 14, wherein
    A heat exchanger configured such that the liquid-phase refrigerant flowing out from the liquid storage region of the liquid reservoir merges with the refrigerant flowing out from the outlet for the compressor.
  17. 　請求項１に記載の熱交換器であって、
    　前記熱交換部は、
    　流れこんだ冷媒を空気と熱交換させて前記貯液器に送り出す上流側熱交換部（３）と、
    　前記貯液器から流出した液相冷媒が流れ込み、空気と熱交換させる下流側熱交換部（４）と、を有し、
    　前記貯液器と、前記冷媒調整部と、前記上流側熱交換部と、前記下流側熱交換部と、が一体的に結合されている、熱交換器。     The heat exchanger according to claim 1,
    The heat exchange part is
    An upstream heat exchange section (3) for exchanging heat of the flowing refrigerant with air and sending it to the reservoir;
    A downstream heat exchange section (4) for allowing the liquid phase refrigerant flowing out of the reservoir to flow in and exchange heat with air, and
    The heat exchanger in which the liquid reservoir, the refrigerant adjustment unit, the upstream heat exchange unit, and the downstream heat exchange unit are integrally coupled.
  18. 　請求項１４記載の熱交換器であって、
    　前記冷媒調整部は、
    　前記コンプレッサから流れ込む高圧冷媒が流入する高圧冷媒流入口（２１ａ）と、前記冷媒流出口との間に設けられ、流路を開閉する機能と冷媒の圧力を低下させる機能とを有する第１調整部（２１）と、
    　前記貯液器から流れ込む気相冷媒が流入する気相冷媒流入口（２２ａ）と、前記コンプレッサ行き流出口との間に設けれ、流路を開閉する機能を有する第２調整部（２２）と、を有し、
    　前記第２調整部を挟んで、前記第１調整部と前記貯液器とが互いに反対側に位置するように設けられている、熱交換器。     The heat exchanger according to claim 14, wherein
    The refrigerant adjustment unit is
    A first adjustment unit that is provided between the high-pressure refrigerant inlet (21a) into which the high-pressure refrigerant flowing from the compressor flows and the refrigerant outlet and has a function of opening and closing the flow path and a function of reducing the pressure of the refrigerant. (21) and
    A second adjusting portion (22) provided between the gas-phase refrigerant inlet (22a) into which the gas-phase refrigerant flowing from the liquid reservoir flows and the compressor outlet and having a function of opening and closing the flow path; Have
    A heat exchanger provided such that the first adjustment unit and the liquid reservoir are located on opposite sides of the second adjustment unit.
PCT/JP2017/013976 2016-04-08 2017-04-03 Heat exchanger WO2017175725A1 (en)

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DE112017001883.8T DE112017001883T5 (en) 2016-04-08 2017-04-03 heat exchangers
US16/091,917 US10845124B2 (en) 2016-04-08 2017-04-03 Heat exchanger
CN201780021725.0A CN108885034B (en) 2016-04-08 2017-04-03 Heat exchanger

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JP2016-078225 2016-04-08
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007303746A (en) * 2006-05-11 2007-11-22 Denso Corp Refrigerating cycle and part assembly for refrigerating cycle
JP2014149123A (en) * 2013-02-01 2014-08-21 Denso Corp Refrigeration cycle device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007303746A (en) * 2006-05-11 2007-11-22 Denso Corp Refrigerating cycle and part assembly for refrigerating cycle
JP2014149123A (en) * 2013-02-01 2014-08-21 Denso Corp Refrigeration cycle device

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