US20150053384A1 - Heat exchanger header, heat exchanger having the heat exchanger header, refrigeration cycle apparatus and air-conditioning apparatus - Google Patents

Heat exchanger header, heat exchanger having the heat exchanger header, refrigeration cycle apparatus and air-conditioning apparatus Download PDF

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Publication number
US20150053384A1
US20150053384A1 US14/394,124 US201314394124A US2015053384A1 US 20150053384 A1 US20150053384 A1 US 20150053384A1 US 201314394124 A US201314394124 A US 201314394124A US 2015053384 A1 US2015053384 A1 US 2015053384A1
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United States
Prior art keywords
refrigerant
heat exchanger
header
holes
chamber
Prior art date
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Abandoned
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US14/394,124
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English (en)
Inventor
Akira Ishibashi
Takuya Matsuda
Sangmu Lee
Takashi Okazaki
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Filing date
Publication date
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Assigned to MITSUBISHI ELECTRIC CORPORATION reassignment MITSUBISHI ELECTRIC CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OKAZAKI, TAKASHI, LEE, SANGMU, MATSUDA, TAKUYA, ISHIBASHI, AKIRA
Publication of US20150053384A1 publication Critical patent/US20150053384A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0265—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0265—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box
    • F28F9/0268—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box in the form of multiple deflectors for channeling the heat exchange medium
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F28D2021/0071—Evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F2009/0285—Other particular headers or end plates
    • F28F2009/0292—Other particular headers or end plates with fins

Definitions

  • the present invention relates to a heat exchanger header for a heat exchanger used in a refrigeration cycle apparatus such as an air-conditioning apparatus, and a heat exchanger having the heat exchanger header, a refrigeration cycle apparatus and an air-conditioning apparatus.
  • an inlet side header is required to have a function of equally distributing refrigerant.
  • a header having such a function hitherto, there has been a header in which a looped flow passage that makes a U-turn in the vertical direction is formed in the header, and an incoming two-phase refrigerant flow is circulated and homogenized in the header, and is distributed to each of a plurality of heat transfer tubes (see, for example, Patent Literature 1).
  • the present invention has been made in view of such points, and it is an object of the present invention to provide a heat exchanger header that can suppress pressure loss, can equally distribute refrigerant without degrading heat transfer performance of a heat exchanger, and has a simple structure, and a heat exchanger having the heat exchanger header, a refrigeration cycle apparatus and an air-conditioning apparatus.
  • a heat exchanger header is a heat exchanger header for a heat exchanger in which refrigerant is flowed in parallel through a plurality of heat transfer tubes disposed in parallel, the heat exchanger header being configured to distribute the refrigerant to the plurality of heat transfer tubes in parallel by effect of surface tension, wherein a plurality of through-holes to which ends of the plurality of heat transfer tubes are connected are arranged side by side in a longitudinal direction, wherein at least one chamber communicating with the plurality of through-holes and serving as a refrigerant flow passage is formed, and wherein each of the plurality of through-holes is an inlet side through-hole or an outlet side through-hole to which a refrigerant inlet side or refrigerant outlet side end of the plurality of heat transfer tubes is connected, and in a part of the chamber that faces the inlet side through-holes, a plurality of grooves extending in the longitudinal direction of the header are formed in a lateral direction perpendicular to the longitudinal direction.
  • a heat exchanger header that can suppress pressure loss, can equally distribute refrigerant without degrading heat transfer performance of a heat exchanger, and has a simple structure can be obtained.
  • FIG. 1 is a schematic front view of a heat exchanger 1 employing a heat exchanger header according to Embodiment 1 of the present invention.
  • FIG. 2 is a perspective view showing one of the flat tubes 30 of FIG. 1 .
  • FIG. 3 is an exploded perspective view of the inlet header 10 of FIG. 1 .
  • FIG. 4 is a sectional view of the inlet header part of FIG. 1 taken along line A-A.
  • FIG. 5 is a diagram showing a refrigerant circuit of a refrigeration cycle apparatus 50 to which the heat exchanger 1 of FIG. 1 is applied.
  • FIG. 6 is a diagram showing the flow of refrigerant in the case where the heat exchanger 1 of FIG. 1 is used as an evaporator.
  • FIG. 7 is a diagram showing the flow state of refrigerant in the inlet header 10 .
  • FIG. 8 is a sectional view taken along line B-B of FIG. 7 .
  • FIG. 9 shows the flow state of refrigerant in a header not provided with grooves as a comparative example.
  • FIG. 10 is a diagram showing Modification 1 of the grooves 14 of FIG. 3 .
  • FIG. 11 is a diagram showing Modification 2 of the grooves 14 of FIG. 3 .
  • FIG. 12 is a diagram showing a heat exchanger 1 A according to Embodiment 2 of the present invention.
  • FIG. 13 is an exploded perspective view of the header 70 of FIG. 124 .
  • FIG. 14 shows modifications of the grooves 14 of FIG. 13 .
  • FIG. 15 shows a heat exchanger 1 B according to Embodiment 3 of the present invention.
  • FIG. 1 is a schematic perspective view of a heat exchanger employing a heat exchanger header according to Embodiment 1 of the present invention.
  • the same reference signs are used for the same or corresponding components, and this is common throughout the specification.
  • the forms of components described in the whole specification are illustrative only, and the present invention is not limited to these descriptions.
  • the heat exchanger 1 is a parallel flow heat exchanger in which refrigerant is flowed in parallel, particularly a one-way flow passage type heat exchanger in which refrigerant is flowed from one side to the other side in the whole heat exchanger 1 .
  • the heat exchanger 1 has a pair of headers 10 and 20 spaced from each other, a plurality of flat tubes (heat transfer tubes) 30 that are disposed in parallel between the pair of headers 10 and 20 and both ends of which are connected to the pair of headers 10 and 20 , and a plurality of fins 40 .
  • the pair of headers 10 and 20 , the flat tubes 30 , and the fins 40 are all formed of aluminum or aluminum alloy.
  • the fins 40 are plate-like fins that are stacked at intervals between the pair of headers 10 and 20 and between which air passes, and the plurality of flat tubes 30 are passed therethrough.
  • the fins 40 do not necessarily have to be plate-like fins, and only have to be fins 40 disposed such that air passes in the air passage direction.
  • the fins 40 may be, for example, corrugated fins or the like alternately stacked with the flat tubes 30 in the vertical direction. In short, the fins 40 only have to be fins disposed such that air passes in the air passage direction.
  • the flat tubes 30 have a plurality of through-holes 30 a serving as refrigerant flow passages as shown in FIG. 2 .
  • Heat transfer tubes are not limited to flat tubes, and circular tubes and tubes having any other shape can be used.
  • the inlet header 10 on the refrigerant inlet side of the plurality of flat tubes 30 is connected to a refrigerant inlet pipe 10 a
  • the outlet header 20 on the refrigerant outlet side of the plurality of flat tubes 30 is connected to a refrigerant outlet pipe 20 a.
  • the present invention has a characteristic in, of the pair of headers 10 and 20 , particularly the header on the inlet side (hereinafter referred to as inlet header 10 ). The structure thereof will be described with reference to FIG. 3 below.
  • FIG. 3 is an exploded perspective view of the inlet header 10 of FIG. 1 .
  • FIG. 4 is a sectional view of the inlet header part of FIG. 1 taken along line A-A.
  • the inlet header 10 has a box-like header main body 11 with one side open, and a plate-like lid body 13 covering an opening 11 a of the header main body 11 , and at least one chamber 10 A serving as a refrigerant flow passage is formed therebetween.
  • a plurality of through-holes 12 serving as inlet side through-holes are arranged side by side along the longitudinal direction of the header main body 11 .
  • the refrigerant inlet side ends of the plurality of flat tubes 30 are connected to the plurality of through-holes 12 , and communicate with the chamber 10 A.
  • the refrigerant inlet pipe 10 a is connected to the inlet header 10 .
  • a plurality of grooves 14 extending in the longitudinal direction are formed over the entire length in the lateral direction perpendicular to the longitudinal direction.
  • the grooves 14 are formed by the gaps between a plurality of protrusions 15 protruding from the lid body 13 .
  • the grooves 14 are provided in order to draw refrigerant liquid flowing into the inlet header 10 into the grooves by the effect of surface tension and to thereby equally distribute the refrigerant from the inlet header 10 to each pass.
  • the box-like header main body 11 is formed by cutting or the like, and the through-holes 12 are formed in the header main body 11 .
  • the lid body 13 is formed by cutting or the like.
  • the lid body 13 is fittably configured so as to be able to be temporarily fastened to the opening 11 a of the header main body 11 , and brazing filler metal is applied to the fitting parts.
  • the lid body 13 When manufacturing the whole heat exchanger 1 , the lid body 13 is fitted in and temporarily fastened to the opening 11 a of the header main body 11 , and, in a state where the outlet header 20 , the flat tubes 30 , and the fins 40 are all assembled, the whole is joined by brazing at the same time.
  • FIG. 5 is a diagram showing a refrigerant circuit of a refrigeration cycle apparatus 50 to which the heat exchanger 1 of FIG. 1 is applied.
  • the refrigeration cycle apparatus 50 includes a compressor 51 , a condenser 52 , an expansion valve 53 as a pressure reducing device, and a evaporator 54 .
  • the heat exchanger 1 is used as at least one of the condenser 52 and the evaporator 54 .
  • Gas refrigerant discharged from the compressor 51 flows into the condenser 52 , exchanges heat with air passing through the condenser 52 to become high-pressure liquid refrigerant, and flows out.
  • the high-pressure liquid refrigerant flowing out of the condenser 52 is reduced in pressure by the expansion valve 53 to become low-pressure two-phase gas-liquid refrigerant, and flows into the evaporator 54 .
  • the low-pressure two-phase gas-liquid refrigerant flowing into the evaporator 54 exchanges heat with air passing through the evaporator 54 to become low-pressure gas refrigerant, and is sucked into the compressor 51 again.
  • FIG. 6 is a diagram showing the flow of refrigerant in the case where the heat exchanger 1 of FIG. 1 is used as an evaporator.
  • Two-phase gas-liquid refrigerant flowing out of the expansion valve 53 flows through the refrigerant inlet pipe 10 a into the inlet header 10 .
  • the refrigerant flowing into the inlet header 10 flows from one end to the other end of the flat tubes 30 constituting each pass of the heat exchanger 1 , merges in the outlet header 20 , and flows through the refrigerant outlet pipe 20 a to the outside.
  • FIG. 7 is a diagram showing the flow state of refrigerant in the inlet header 10 .
  • FIG. 8 is a sectional view taken along line B-B of FIG. 7 , and is a schematic diagram showing a state where liquid refrigerant is accumulated between the grooves in the inlet header 10 .
  • FIG. 9 includes diagrams (a) and (b) showing the flow state of refrigerant in a header not provided with grooves 14 as a comparative example.
  • Embodiment 1 by providing the lid body 13 with a plurality of grooves 14 and causing surface tension to act, unevenness of liquid refrigerant can be suppressed, and refrigerant can be equally distributed to and caused to flow into each of the plurality of flat tubes 30 .
  • the heat exchange efficiency can be improved, and the capacity in the case where the heat exchanger 1 is used as an evaporator can be exerted to the maximum.
  • Embodiment 1 utilizes the action of surface tension of liquid refrigerant to prevent uneven refrigerant distribution, the pressure loss can be suppressed as compared to the conventional configuration, and the performance degradation in the case where the heat exchanger 1 is used as an evaporator can be suppressed.
  • the inlet header 10 of Embodiment 1 is composed of a header main body 11 and a lid body 13 having grooves 14 , and has a simple structure, it is easy to manufacture, and can be reduced in cost.
  • the inlet header of the present invention is not limited to the structure shown in FIG. 3 , and various modifications, such as the following (1) and (2), may be made without departing from of the scope of the present invention.
  • FIG. 10 is a Diagram Showing Modification 1 of the Grooves 14 of FIG. 3.
  • the protrusions 15 are all the same in height.
  • the height of the protrusions 15 may be alternately large and small in the lateral direction of the lid body 13 (the vertical direction in FIG. 10 ).
  • the end faces (inclined surfaces) of the grooves 14 closest to the flat tubes 30 are wide as compared to the configuration in which the protrusions 15 are all the same in height as shown in FIG. 5 . Therefore, it can be expected that the effect of drawing liquid refrigerant is improved.
  • the height of the protrusions 15 is not limited to the configuration in which the height of the protrusions 15 is alternately long and short. As long as every two of the protrusions 15 adjacent in the lateral direction of the lid body 13 differ in height, the same effects can be expected.
  • the following Modification 2 is another example of the configuration in which every two of the protrusions 15 adjacent in the lateral direction of the lid body 13 differ in height.
  • FIG. 11 is a Diagram Showing Modification 2 of the Grooves 14 of FIG. 3.
  • the present invention is characterized in that the inlet header 10 is provided with a plurality of grooves 14 .
  • a heat exchanger 1 to which the character is applied in Embodiment 1, an example of a one-way flow passage type heat exchanger is shown in which refrigerant flows from one side to the other in the whole heat exchanger.
  • the character can also be applied to a U-turn flow passage type heat exchanger in which refrigerant flows while making U-turns.
  • the configuration in which the present invention is applied to a U-turn flow passage type heat exchanger will be described below with reference to the following Embodiment 2 and Embodiment 3.
  • FIG. 12 is a diagram showing a heat exchanger 1 A according to Embodiment 2 of the present invention.
  • the heat exchanger 1 A is a parallel flow heat exchanger in which refrigerant is flowed in parallel, particularly a U-turn flow passage type heat exchanger.
  • a configuration example is shown in which the number of passes is five.
  • the heat exchanger 1 A has a pair of headers 70 and 80 spaced from each other, a plurality of ( 20 here) flat tubes (heat transfer tubes) 30 that are disposed in parallel between the pair of headers 70 and 80 and both ends of which are connected to the pair of headers 70 and 80 , and a plurality of fins 40 .
  • the pair of headers 70 and 80 , the flat tubes 30 , and the fins 40 are all formed of aluminum or aluminum alloy.
  • the configurations of the flat tubes 30 and the fins 40 are the same as Embodiment 1.
  • FIG. 13 is an exploded perspective view of the header 70 of FIG. 12 .
  • the header 70 has a box-like header main body 71 with one side open.
  • a plurality of through-holes 72 to which a plurality of flat tubes 30 are connected are arranged side by side along the longitudinal direction of the header main body 71 .
  • Two partition plates 73 are provided inside the header main body 71 , and three independent chambers A, B, and C that communicate with the plurality of through-holes 72 and serve as refrigerant flow passages are formed, and are covered by lid bodies 74 A, 74 B, and 74 C, respectively.
  • a plurality of grooves 14 having the same function as Embodiment 1 are formed in parts of the lid bodies 74 A, 74 B, and 74 C that face the refrigerant inlet side ends of the flat tubes 30 . A specific description will be given below.
  • the chamber A is an inflow chamber into which refrigerant from the outside flows.
  • the refrigerant inlet side ends of the flat tubes 30 are connected to the plurality of through-holes 72 communicating with the chamber A, and therefore grooves 14 are formed on the whole of the lid body 74 A.
  • the chamber B is a U-turn chamber serving as a U-turn flow passage. Of the plurality of through-holes 72 communicating with the chamber B, the upper half is connected to the refrigerant inlet side ends of the flat tubes 30 , and the lower half is connected to the refrigerant outlet side ends of the flat tubes 30 , and therefore grooves 14 are formed on the upper half of the lid body 74 B.
  • the chamber C is an outflow chamber from which refrigerant flows to the outside.
  • the plurality of through-holes 72 communicating with the chamber C are connected to the refrigerant outlet side ends of the flat tubes 30 , and therefore grooves 14 are not formed on the lid body 74 C.
  • the through-holes to which the refrigerant inlet side ends of the flat tubes 30 are connected may be referred to as inlet side through-holes
  • the through-holes to which the refrigerant outlet side ends of the flat tubes 30 are connected may be referred to as outlet side through-holes.
  • the header 80 is provided with one partition plate 83 as shown in FIG. 12 , and the inside thereof is divided into two chambers D and E.
  • the chambers D and E are covered by lid bodies 84 D and 84 E, respectively.
  • a plurality of grooves 14 are formed in parts of the lid bodies 84 D and 84 E that face the inlet side through-holes of the flat tubes 30 .
  • a plurality of grooves 14 are formed on the upper half thereof.
  • the header main body 71 is formed by cutting or the like, and the through-holes 72 are formed in the header main body 71 .
  • the lid bodies 74 A, 74 B, and 74 C are formed by cutting or the like.
  • the lid bodies 74 A, 74 B, and 74 C are fittably configured so as to be able to be temporarily fastened to the openings of the chambers A, B, and C of the header main body 71 , and brazing filler metal is applied to the fitting parts.
  • the header 80 can be manufactured in the same manner.
  • the lid bodies 74 A, 74 B, and 74 C are fitted in and temporarily fastened to the openings of the chambers A, B, and C, respectively, of the header 70
  • the lid bodies 84 D and 84 E are fitted in and temporarily fastened to the openings of the chambers D and E, respectively, of the header 80 .
  • the whole is joined by brazing at the same time.
  • Two-phase gas-liquid refrigerant flowing through the refrigerant inlet pipe 10 a flows into the chamber A, flows from one end to the other end of a flat tube group connected to the chamber A, and flows into the chamber D.
  • the refrigerant flowing into the chamber D makes a U-turn here, flows from one end to the other end of another flat tube group connected to the chamber D, and flows into the chamber B.
  • the refrigerant flowing into the chamber B makes a U-turn here, flows from one end to the other end of another flat tube group connected to the chamber B, and flows into the chamber E.
  • the refrigerant flowing into the chamber E makes a U-turn here, and flows from one end to the other end of another flat tube group connected to the chamber E.
  • the refrigerant flowing out of this other end merges in the chamber C, and flows through the refrigerant outlet pipe 20 a to the outside.
  • Embodiment 2 also in a U-turn flow passage type heat exchanger, the same advantageous effects as Embodiment 1 can be obtained.
  • the positions of the ends closest to the border between the inlet side through-hole group and the outlet side through-hole group are all the same. However, they may be as shown in FIG. 14 .
  • FIG. 14 shows modifications of the grooves 14 of FIG. 13 and includes views of the lid body 74 B, 84 D, 84 E as viewed from the side of the surface on which grooves 14 are formed.
  • the positions of the ends closest to the border between the inlet side through-hole group and the outlet side through-hole group may be alternately staggered in the lateral direction of the lid body.
  • the end faces of the grooves 14 closest to the border are inclined surfaces, the end faces are wide as compared to a configuration in which the positions of the ends are all the same as shown in FIG. 13 , and therefore it can be expected that the effect of drawing liquid refrigerant is improved.
  • the positions of the ends of the protrusions 15 are not limited to such an alternately staggered configuration. As long as every two of the protrusions 15 adjacent in the lateral direction of the lid body differ in position, the same effect can be expected.
  • FIG. 14 ( b ) shows another example of the configuration in which every two of the protrusions 15 adjacent in the lateral direction of the lid body differ in position. As shown, the length in the longitudinal direction of the protrusions 15 may decrease toward the central part in the lateral direction, or, although not shown, the length in the longitudinal direction of the protrusions 15 may increase toward the central part in the lateral direction.
  • Embodiment 3 corresponds to a configuration in which a plurality of (two here) lines of U-turn flow passage type heat exchangers of Embodiment 2 are provided in the air passage direction.
  • FIG. 15 includes diagrams showing a heat exchanger according to Embodiment 3 of the present invention.
  • FIG. 15 ( a ) is a schematic side view of the heat exchanger as viewed from a direction perpendicular to the air passage direction shown by dashed arrows.
  • FIG. 15 ( b ) is a schematic sectional view of an upstream side heat exchanging unit 1 Ba on the upstream side in the air passage direction.
  • FIG. 15 ( c ) is a schematic sectional view of a downstream side heat exchanging unit 1 Bb on the downstream side in the air passage direction.
  • FIG. 15 ( d ) is a plan view of the heat exchanger.
  • Embodiment 3 will be described below focusing on differences from Embodiment 2.
  • the heat exchanger 1 B has a heat exchanger 1 A that is the same as Embodiment 2, as the upstream side heat exchanging unit 1 Ba, and has the downstream side heat exchanging unit 1 Bb on the downstream side in the air passage direction.
  • the upstream side heat exchanging unit 1 Ba and the downstream side heat exchanging unit 1 Bb are connected by an inter-line pipe 90 .
  • the downstream side heat exchanging unit 1 Bb has ten passes.
  • the downstream side heat exchanging unit 1 Bb has more passes than the upstream side heat exchanging unit 1 Ba. The reason that the number of passes differs between the upstream side heat exchanging unit 1 Ba and the downstream side heat exchanging unit 1 Bb will be described later.
  • the downstream side heat exchanging unit 1 Bb is the same as the upstream side heat exchanging unit 1 Ba except that it differs in the configuration of the header part from the upstream side heat exchanging unit 1 Ba.
  • a header 700 to which the inter-line pipe 90 is connected in the downstream side heat exchanging unit 1 Bb differs in the number of partition plates from the upstream side heat exchanging unit 1 Ba.
  • the header 700 is provided with one partition plate 703 , and two chambers F and G are formed therein.
  • a header 800 is provided with no partition plate, and one chamber H is formed in the whole thereof.
  • grooves 14 are provided in parts of the headers 700 and 800 of the downstream side heat exchanging unit 1 Bb that face the refrigerant inlet side end of each flat tube 30 .
  • the quality of refrigerant is low. Therefore, the number of passes is reduced to increase the flow rate of refrigerant, and to increase the heat transfer coefficient.
  • the downstream side heat exchanging unit 1 Bb corresponding to the second half of the flow passage the quality is high. Therefore, the number of passes is increased to reduce the flow rate of refrigerant, and to reduce the pressure loss.
  • Embodiment 3 Although a two-line configuration is described in Embodiment 3, a three or more-line configuration may be used.
  • the outer shape of header is square
  • the outer shape of header is not limited to a square shape, and may be a cylindrical shape.
  • a square shape is preferable in terms of securing the size required as a header and causing lines to interfere with each other.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
US14/394,124 2012-04-26 2013-04-23 Heat exchanger header, heat exchanger having the heat exchanger header, refrigeration cycle apparatus and air-conditioning apparatus Abandoned US20150053384A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
PCT/JP2012/002879 WO2013160956A1 (ja) 2012-04-26 2012-04-26 熱交換器用ヘッダ及びこの熱交換器用ヘッダを備えた熱交換器
JPPCT/JP2012/002879 2012-04-26
PCT/JP2013/061858 WO2013161795A1 (ja) 2012-04-26 2013-04-23 熱交換器用ヘッダ及びこの熱交換器用ヘッダを備えた熱交換器

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US (1) US20150053384A1 (de)
EP (1) EP2865983B1 (de)
CN (2) CN104285121B (de)
ES (1) ES2883139T3 (de)
WO (2) WO2013160956A1 (de)

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US20190257594A1 (en) * 2016-09-29 2019-08-22 Daikin Industries, Ltd. Heat exchanger and air conditioner
US20200049430A1 (en) * 2018-08-08 2020-02-13 Denso International America, Inc. Header Tank for Heat Exchanger
US10883745B2 (en) 2016-06-27 2021-01-05 Mitsubishi Electric Corporation Refrigeration cycle apparatus

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CN107367089A (zh) * 2016-05-13 2017-11-21 浙江盾安热工科技有限公司 微通道换热器
JP6772731B2 (ja) * 2016-09-30 2020-10-21 ダイキン工業株式会社 熱交換器の製造方法
WO2019116413A1 (ja) * 2017-12-11 2019-06-20 三菱電機株式会社 フィンレス熱交換器および冷凍サイクル装置
CN107941054B (zh) * 2017-12-13 2020-04-17 深圳易信科技股份有限公司 气液热交换装置
CN108592663B (zh) * 2018-02-12 2020-02-21 深圳易信科技股份有限公司 一种气液热交换装置
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EP2865983A4 (de) 2016-05-25
EP2865983B1 (de) 2021-07-14
CN104285121A (zh) 2015-01-14
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CN104285121B (zh) 2016-10-12
WO2013160956A1 (ja) 2013-10-31

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