WO2019244397A1 - Échangeur de chaleur et climatiseur - Google Patents

Échangeur de chaleur et climatiseur Download PDF

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Publication number
WO2019244397A1
WO2019244397A1 PCT/JP2019/006132 JP2019006132W WO2019244397A1 WO 2019244397 A1 WO2019244397 A1 WO 2019244397A1 JP 2019006132 W JP2019006132 W JP 2019006132W WO 2019244397 A1 WO2019244397 A1 WO 2019244397A1
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WO
WIPO (PCT)
Prior art keywords
refrigerant
heat exchanger
fin group
flat tube
flows
Prior art date
Application number
PCT/JP2019/006132
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English (en)
Japanese (ja)
Inventor
政貴 川村
Original Assignee
シャープ株式会社
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
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Priority to JP2020525238A priority Critical patent/JPWO2019244397A1/ja
Publication of WO2019244397A1 publication Critical patent/WO2019244397A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements

Definitions

  • the present invention relates to a heat exchanger and an air conditioner including the heat exchanger.
  • the heat exchanger described in Patent Literature 1 includes a leeward heat exchanger unit and a leeward heat exchanger unit.
  • Each of the leeward heat exchanger unit and the leeward heat exchanger unit includes a large number of flat tube portions and a large number of fins.
  • One object of one embodiment of the present invention is to realize a heat exchanger or the like that can reduce the displacement of the position of the flat tube.
  • a heat exchanger is a heat exchanger that performs heat exchange with air, and a plurality of heat exchangers arranged in order with respect to the flow of the air.
  • FIG. 2 is a cross-sectional view illustrating a structure of the heat exchanger according to the first embodiment.
  • FIG. 2 is a diagram illustrating a configuration of an air conditioner according to Embodiment 1. It is a perspective view showing the appearance of the indoor unit of the air conditioner concerning Embodiment 1. It is a longitudinal section showing an internal structure of an indoor unit of an air conditioner concerning Embodiment 1.
  • FIG. 2 is a perspective view illustrating an appearance of a part of the heat exchanger according to the first embodiment.
  • FIG. 2 is a sectional view taken along line AA of the heat exchanger shown in FIG. 1.
  • FIG. 2 is a sectional view taken along line BB of the heat exchanger shown in FIG. 1.
  • FIG. 7 is a cross-sectional view illustrating a configuration of a heat exchanger according to a second embodiment.
  • FIG. 9 is a cross-sectional view illustrating a configuration of a heat exchanger according to a third embodiment.
  • FIG. 2 is a diagram illustrating a configuration of the air conditioner 100 according to the present embodiment.
  • the air conditioner 100 includes an indoor unit 1, an outdoor unit 11, an expansion valve 12, a two-way valve 13, and a three-way valve 14.
  • the indoor unit 1 includes a blower 4 and a heat exchanger 6.
  • the outdoor unit 11 includes a blower 15, a heat exchanger 16, a compressor 17, and a four-way valve 18.
  • FIG. 2 shows a route of the four-way valve 18 during the cooling operation.
  • the refrigerant liquefies when cooled by being sent by the blower 15 from the outside toward the heat exchanger 16.
  • the air that has passed through the heat exchanger 16 is discharged to the outside while containing the heat released by liquefaction of the refrigerant in the heat exchanger 16.
  • the liquefied refrigerant is vaporized at a stretch by being injected into the heat exchanger 6 of the indoor unit 1 from the minute nozzle hole of the expansion valve 12 via the two-way valve 13.
  • the heat exchanger 6 is cooled by the vaporized refrigerant taking heat around the heat exchanger 6.
  • the air taken in from outside by the blower 4 is cooled by passing through the heat exchanger 6.
  • the cool air from the heat exchanger 6 is discharged outside.
  • the refrigerant that has exited the heat exchanger 6 returns to the compressor 17 via the three-way valve 14 and is compressed again.
  • the high-temperature and high-pressure refrigerant compressed by the compressor 17 flows in the opposite direction to that during cooling by switching the path of the four-way valve 18 from the path illustrated in FIG.
  • heat exchange by the heat exchangers 6 and 16 is performed in a cycle opposite to that in the cooling.
  • FIG. 3 is a perspective view illustrating an appearance of an indoor unit (hereinafter simply referred to as an indoor unit) 1 of the air conditioner according to the present embodiment.
  • FIG. 4 is a longitudinal sectional view showing the internal structure of the indoor unit 1.
  • the indoor unit 1 includes a main body 2 and a baffle plate 3.
  • the air guide plate 3 is provided on the front surface of the main body 2.
  • a first suction port 21 is formed at an upper portion of the main body 2
  • a second suction port 22 is formed at a lower portion of the main body 2.
  • a blower 4 and a heat exchanger 6 are provided inside the main body 2.
  • an outlet 23 is formed at a front portion of the main body 2.
  • the first suction port 21 is provided with an opening / closing lid 26 for opening and closing the first suction port 21.
  • the first filter 24 is provided inside (the lower side) of the first suction port 21, and the second filter 25 is provided inside (the upper side) of the second suction port 22.
  • the first filter 24 is a filter having a function corresponding to, for example, a pre-filter.
  • the first filter 24 has lower performance than the second filter 25 and has a lower ventilation resistance than the second filter 25.
  • the second filter 25 is, for example, a HEPA filter (High Efficiency Particulate Air Filter).
  • the second filter 25 is a filter having higher performance than the first filter 24 and having a larger ventilation resistance than the first filter 24.
  • the air sucked from the first inlet 21 is blown out from the outlet 23 through the first filter 24, the blower 4 and the heat exchanger 6. Further, the air sucked from the second suction port 22 is blown out from the outlet 23 through the second filter 25, the blower 4 and the heat exchanger 6.
  • FIG. 1 is a sectional view showing the structure of the heat exchanger 5. Specifically, FIG. 1 is a diagram showing a cross section of the heat exchanger 5 in a plane parallel to a direction in which air flows.
  • FIG. 5 is a perspective view showing the appearance of a part of the heat exchanger 5.
  • FIG. 6 is a sectional view taken along line AA of the heat exchanger 5 shown in FIG.
  • FIG. 7 is a cross-sectional view taken along the line BB of the heat exchanger 5 shown in FIG.
  • the heat exchanger 5 includes an inner fin group 51 (fin group, first fin group), an outer fin group 52 (fin group, second fin group), A pipe 53 and a header pipe 54 are provided.
  • the inner fin group 51, the outer fin group 52, and the flat tubes 53 are stacked in a depth direction (a direction perpendicular to the plane of the flat tubes 53) on the paper surface of FIG.
  • the inner fin group 51 is omitted except for a part.
  • the outer fin group 52 is not shown.
  • the heat exchanger 5 exchanges heat with air.
  • the inner fin group 51 performs heat exchange with air passing between the inner fin groups 51.
  • the outer fin group 52 exchanges heat with air passing between the outer fin groups 52.
  • the inner fin group 51 and the outer fin group 52 may be, for example, corrugated fins.
  • the inner fin group 51 and the outer fin group 52 are arranged over the entirety of the heat exchanger 5 in the left-right direction of the indoor unit 1.
  • the inner fin group 51 and the outer fin group 52 are sequentially arranged with respect to the flow of air.
  • “arranged in order” means that (i) one of the inner fin group 51 and the outer fin group 52 is arranged on the upstream side in the air flow from the other, or (ii) the inner fin group 51 and the It can also be described that the outer fin groups 52 are arranged in series along the flow of air. Further, the outer fin group 52 is arranged more apart from the blower 4 than the inner fin group 51 is. Therefore, the air blown out from the blower 4 first contacts the inner fin group 51, and then contacts the outer fin group 52.
  • the flat tube 53 is a member through which a refrigerant that performs heat exchange with the inner fin group 51 and the outer fin group 52 flows. Inside the flat tube 53, a plurality of channels 533 (refrigerant flow paths) parallel to the left-right direction of the indoor unit 1 are formed.
  • the channel 533 is a flow path through which the refrigerant flows.
  • the refrigerant those used in general heat exchangers can be used without any particular limitation.
  • the flat tube 53 is formed so as to straddle the inner fin group 51 and the outer fin group 52 so as to contact both the inner fin group 51 and the outer fin group 52.
  • a region of the flat tube 53 that comes into contact with the inner fin group 51 is referred to as an inner region 531.
  • the area of the flat tube 53 that contacts the outer fin group 52 is referred to as an outer area 532.
  • the channel 533 corresponding to the inner area 531 is a flow path through which a coolant for cooling the inner fin group 51 flows.
  • the channel 533 corresponding to the outer region 532 is a flow channel through which a coolant that cools the outer fin group 52 flows.
  • Each of the flat tubes 53 contacts the inner fin group 51 and the outer fin group 52 on both sides.
  • the plurality of channels 533 are provided at positions corresponding to the inner region 531 and the outer region 532, respectively.
  • the channel 533 provided at a position corresponding to the inner region 531 and the channel 533 provided at a position corresponding to the outer region 532 are independent of each other. That is, the channel through which the refrigerant that cools the inner fin group 51 flows and the channel through which the refrigerant that cools the outer fin group 52 flows are independent of each other.
  • “independent from each other” means that they are not in communication with each other.
  • channels 533 are provided for each of the inner region 531 and the outer region 532 for one flat tube 53.
  • the number of channels 533 is not limited to this. Further, the number of channels 533 provided corresponding to the inner region 531 and the number of channels 533 provided corresponding to the outer region 532 may be different from each other.
  • a notch 534 is formed in the flat tube 53 in a region between the inner region 531 and the outer region 532 (a plurality of regions).
  • a plurality of notches 534 are formed along the left-right direction of the indoor unit 1.
  • the number, shape, and size of the cutout portions 534 are not particularly limited, and may be formed in at least a part of a region between the inner region 531 and the outer region 532.
  • Patent Literature 1 For example, in a conventional heat exchanger as disclosed in Patent Literature 1, a difference between the flat tubes in a direction perpendicular to the air flow direction occurs due to variations in assembling the heat exchanger. There is a possibility that the position is shifted.
  • the flat tube 53 is formed so as to straddle the adjacent fin group so as to contact both the inner fin group 51 and the outer fin group 52.
  • the possibility that the displacement will occur is reduced.
  • an increase in ventilation resistance of the heat exchanger 5 due to the displacement of the position is suppressed. Therefore, in the indoor unit 1, (i) an increase in energy required to obtain a desired air volume and (ii) an increase in noise in obtaining a desired air volume due to the above-mentioned displacement are eliminated.
  • the heat exchanger 5 of the present embodiment since the positioning itself of the inner fin group 51 and the outer fin group 52 is not required, the man-hour required for the production of the heat exchanger 5 is also reduced.
  • the header pipe 54 is a pipe that communicates with the channel 533.
  • the header pipe 54 includes an inner supply pipe 541 (first refrigerant supply pipe), an inner extraction pipe 542 (first refrigerant extraction pipe), an outer supply pipe 543 (second refrigerant supply pipe), and an outer extraction pipe 544 (second refrigerant). Removal pipe).
  • Each of the plurality of flat tubes 53 is connected to an inner supply pipe 541, an inner supply pipe 542, an outer supply pipe 543, and an outer supply pipe 544.
  • the inside supply pipe 541 and the inside extraction pipe 542 are arranged at both ends of the inside area 531 of the flat tube 53 in the left-right direction of the indoor unit 1.
  • the inside supply pipe 541 is a pipe for supplying the coolant to the channel 533 through which the coolant for cooling the inside fin group 51 flows (that is, the channel 533 corresponding to the inside region 531).
  • the inner extraction pipe 542 is a pipe for extracting the refrigerant from the channel 533 through which the refrigerant for cooling the inner fin group 51 flows.
  • the outer supply pipe 543 and the outer extraction pipe 544 are arranged at both ends of the outer region 532 of the flat tube 53 in the left-right direction of the indoor unit 1.
  • the outer supply pipe 543 is a pipe for supplying the coolant to the channel 533 through which the coolant for cooling the outer fin group 52 flows (that is, the channel 533 corresponding to the outer region 532).
  • the outer extraction pipe 544 is a pipe for extracting the refrigerant from the channel 533 through which the refrigerant that cools the outer fin group 52 flows.
  • the air sent from the blower 4 comes into contact with the inner fin group 51 first, and then comes into contact with the outer fin group 52. Therefore, when the air is cooled by the heat exchanger 5, the inner fin group 51 becomes higher in temperature than the outer fin group 52.
  • the refrigerant removed from the outer extraction pipe 544 has a lower temperature than the refrigerant removed from the inner extraction pipe 542. Therefore, the refrigerant extracted from the outer extraction pipe 544 can be easily reused as compared with the refrigerant extracted from the inner extraction pipe 542.
  • the flat tubes 53 come into contact with both the inner fin group 51 and the outer fin group 52. For this reason, when heat moves from the inner region 531 to the outer region 532 in the flat tube 53 and the temperature of the refrigerant taken out from the outer extraction pipe 544 rises, there is a possibility that the efficiency of reusing the refrigerant may decrease.
  • the cutout portion 534 is formed between the inner region 531 and the outer region 532 as described above.
  • the notch 534 hinders the transfer of heat from the inner region 531 to the outer region 532. For this reason, in the flat tube 53, a rise in the temperature of the refrigerant taken out from the outside extraction pipe 544 is suppressed as compared with the case where the notch portion 534 is not formed. Therefore, in the heat exchanger 5, the refrigerant can be efficiently reused.
  • the notch 534 may not be formed in the flat tube 53.
  • the heat exchanger 5 may further include a fin group other than the inner fin group 51 and the outer fin group 52 arranged in order with respect to air. Also in this case, the flat tube 53 is formed across a plurality of adjacent fin groups so as to be in contact with two or more of the inner fin group 51, the outer fin group 52, and still another fin group. .
  • FIG. 8 is a cross-sectional view showing the configuration of the heat exchanger 5A according to the present embodiment. Specifically, FIG. 8 is a diagram showing a cross section of the heat exchanger 5A in a plane perpendicular to the left-right direction of the indoor unit 1. In FIG. 8, the inner fin group 51 and the outer fin group 52 are omitted.
  • the heat exchanger 5A is different from the heat exchanger 5 in that a flat tube 53A is provided instead of the flat tube 53.
  • the flat tube 53A differs from the flat tube 53 in that a hollow portion 535 is formed instead of the notch 534.
  • the hollow portion 535 is formed in a region located between the inside region 531 and the outside region 532.
  • the hollow portion 535 is independent of the channel 533 and is not connected to the header pipe 54. Therefore, the refrigerant does not flow through the hollow portion 535.
  • the transfer of heat from the inner region 531 to the outer region 532 is inhibited by the hollow portion 535. Therefore, also in the heat exchanger 5A, a decrease in the efficiency of reusing the refrigerant extracted from the outer extraction pipe 544 is suppressed.
  • FIG. 9 is a cross-sectional view illustrating the configuration of the heat exchanger 5B according to the present embodiment. Specifically, FIG. 9 is a diagram illustrating a cross section of the heat exchanger 5B in a plane perpendicular to the left-right direction of the indoor unit 1. In FIG. 9, the inner fin group 51 and the outer fin group 52 are omitted.
  • the heat exchanger 5B is different from the heat exchanger 5 in that a flat tube 53B is provided instead of the flat tube 53.
  • the flat tube 53B is different from the flat tube 53B in that a thin portion 536, which is a portion thinner than other portions of the flat tube 53B, is formed in a region between the inner region 531 and the outer region 532 instead of the notch 534. 53.
  • the thin portion 536 is formed continuously in the left-right direction of the indoor unit 1.
  • the thin portion 536 does not need to be formed entirely in the left-right direction of the indoor unit 1 in the region between the inner region 531 and the outer region 532, and may be formed at least partially.
  • a plurality of thin portions 536 are formed intermittently in the left-right direction of the indoor unit 1, and other portions of the flat tube 53B are provided between the plurality of thin portions 536.
  • a thicker portion which is a thicker portion, may be formed.
  • the strength of the flat tube 53B may be reduced.
  • the thin portion 536 intermittently and forming a thick portion between the thin portions 536, transfer of heat from the inner region 531 to the outer region 532 is inhibited, and the strength of the flat tube 53B is reduced. Can be suppressed.
  • a notch may be further formed between the plurality of thin portions 536.
  • the transfer of heat from the inner region 531 to the outer region 532 is further suppressed as compared with the configuration in which only the thin portion 536 is formed.
  • water drops can be drained from the notch similarly to the flat tube 53.
  • the heat exchanger (5) is a heat exchanger that exchanges heat with air, and includes a plurality of fin groups (inner fin groups) arranged in order with respect to the flow of the air. 51, an outer fin group 52), and a plurality of flat tubes (53) through which a refrigerant that performs heat exchange with the plurality of fin groups flows. Inside each of the plurality of flat tubes, The fin group is formed so as to be in contact with the fin group and straddle a plurality of the adjacent fin groups.
  • each of the plurality of flat tubes straddles the plurality of adjacent fin groups so as to be in contact with the plurality of fin groups arranged in order with respect to the flow of air. Is formed. For this reason, compared to a configuration in which separate flat tubes are in contact with a plurality of fin groups, it is possible to reduce the displacement of the positions of the flat tubes.
  • the flat tube in the first aspect, may have a cutout portion in at least a part of a region between the plurality of regions in contact with the plurality of fin groups. Good.
  • the heat exchanger according to aspect 3 of the present invention is the heat exchanger according to aspect 1 or 2, wherein the flat tube has a thin portion in at least a part of a region between the plurality of regions in contact with the plurality of fin groups. Is also good.
  • the flat tube may include a refrigerant flow path through which the refrigerant flows, and a hollow portion independent from the refrigerant flow path.
  • each of the plurality of flat tubes is A first refrigerant supply pipe for supplying a refrigerant to a refrigerant flow path through which a refrigerant for cooling the first fin group flows, and a first refrigerant withdrawal for extracting the refrigerant from a refrigerant flow path through which the refrigerant for cooling the first fin group flows.
  • a second refrigerant take-out pipe to be taken out.
  • the flat tube is connected to the pipe for supplying the refrigerant for cooling each fin group and the pipe for taking out the refrigerant. Therefore, the flow rate of the refrigerant can be increased, and the cooling efficiency can be improved.
  • the air conditioner according to the sixth aspect of the present invention includes the heat exchanger according to any one of the first to fifth aspects.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)

Abstract

La présente invention concerne un échangeur de chaleur capable de réduire le décalage de position des tubes plats de celui-ci. L'invention concerne un échangeur de chaleur (5) équipé d'un groupe d'ailettes internes (51) et d'un groupe d'ailettes externes (52) qui sont agencés dans cet ordre dans la direction dans laquelle l'air s'écoule, et une pluralité de tubes plats (53) à travers lesquels un fluide de refroidissement s'écoule, chacun de la pluralité de tubes plats étant en contact à la fois avec le groupe d'ailettes internes et le groupe d'ailettes externes.
PCT/JP2019/006132 2018-06-19 2019-02-19 Échangeur de chaleur et climatiseur WO2019244397A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020525238A JPWO2019244397A1 (ja) 2018-06-19 2019-02-19 熱交換器および空気調和機

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018116328 2018-06-19
JP2018-116328 2018-06-19

Publications (1)

Publication Number Publication Date
WO2019244397A1 true WO2019244397A1 (fr) 2019-12-26

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PCT/JP2019/006132 WO2019244397A1 (fr) 2018-06-19 2019-02-19 Échangeur de chaleur et climatiseur

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JP (1) JPWO2019244397A1 (fr)
WO (1) WO2019244397A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1967126A (zh) * 2006-04-21 2007-05-23 王磊 一种冷热交换器
JP2009092262A (ja) * 2007-10-04 2009-04-30 Sharp Corp 熱交換器
JP2014043985A (ja) * 2012-08-27 2014-03-13 Sharp Corp パラレルフロー型熱交換器及びそれを搭載した空気調和機
US20160356555A1 (en) * 2014-02-21 2016-12-08 Hanon Systems Tube for heat exchanger

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1967126A (zh) * 2006-04-21 2007-05-23 王磊 一种冷热交换器
JP2009092262A (ja) * 2007-10-04 2009-04-30 Sharp Corp 熱交換器
JP2014043985A (ja) * 2012-08-27 2014-03-13 Sharp Corp パラレルフロー型熱交換器及びそれを搭載した空気調和機
US20160356555A1 (en) * 2014-02-21 2016-12-08 Hanon Systems Tube for heat exchanger

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