EP2865983B1 - Wärmetauscherkopf und wärmetauscher damit - Google Patents

Wärmetauscherkopf und wärmetauscher damit Download PDF

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Publication number
EP2865983B1
EP2865983B1 EP13780882.0A EP13780882A EP2865983B1 EP 2865983 B1 EP2865983 B1 EP 2865983B1 EP 13780882 A EP13780882 A EP 13780882A EP 2865983 B1 EP2865983 B1 EP 2865983B1
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EP
European Patent Office
Prior art keywords
heat exchanger
refrigerant
header
holes
chamber
Prior art date
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EP13780882.0A
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English (en)
French (fr)
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EP2865983A4 (de
EP2865983A1 (de
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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Publication date
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Publication of EP2865983A1 publication Critical patent/EP2865983A1/de
Publication of EP2865983A4 publication Critical patent/EP2865983A4/de
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Publication of EP2865983B1 publication Critical patent/EP2865983B1/de
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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
    • 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
    • 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 having a heat exchanger header used in a refrigeration cycle apparatus such as an air-conditioning apparatus, 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).
  • Patent Literature 1 Japanese Unexamined Patent Application Publication No. 2011-85324 (Abstract, Fig. 1 )
  • US2006081363A1 discloses a cooling system for a reciprocating engine including a main cooling device and a side tank.
  • the main cooling device includes at least one heat dissipation tube that contains an internal fluid for transporting excess heat developed by a reciprocating engine.
  • the side tank is attached to the main cooling device and includes a plurality of exterior fins for dissipating heat to cool airflow.
  • the exterior fins form an adjustable mounting location.
  • JPS63271099A discloses a heat exchanger according to the preamble of claim 1.
  • US2004031598A1 discloses a heat exchanger comprising a hollow header and a plurality of heat exchanging tubes which are in fluid communication with the header, the cross-sectional shape of the header is formed into an angular cross-sectional shape including a rectangular cross-sectional shape and a square cross-sectional shape.
  • JPH11325785A provides a radiator with integrated oil cooler in which heat exchanging efficiency is enhanced through simple structure while enhancing the recycle performance of each part.
  • JPH11337289A improves pressure resistance without introducing a reduction in an effective front surface area by forming a header in a flat tubular state in which its inner diameter in a tube inserting direction is shorter than its inner diameter in a direction perpendicular to the tube inserting direction, and coupling opposed walls via a reinforcing wall.
  • 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 having 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, a heat exchanger having the heat exchanger header, a refrigeration cycle apparatus and an air-conditioning apparatus.
  • a heat exchanger according to claim 1 is provided.
  • a heat exchanger according to the present invention is a heat exchanger in which refrigerant is flowed in parallel through a plurality of heat transfer tubes disposed in parallel, and comprises a 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
  • 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 perspective view of a heat exchanger employing a heat exchanger header according to Embodiment 1.
  • 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 30a 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 10a
  • the outlet header 20 on the refrigerant outlet side of the plurality of flat tubes 30 is connected to a refrigerant outlet pipe 20a.
  • 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 11a of the header main body 11, and at least one chamber 10A 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 10A.
  • the refrigerant inlet pipe 10a 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 11a 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 11a 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 10a 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 20a 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 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. 12 is a diagram showing a heat exchanger 1A according to Embodiment 2 of the present invention.
  • the heat exchanger 1A 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 1A 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 74A, 74B, and 74C, respectively.
  • a plurality of grooves 14 having the same function as Embodiment 1 are formed in parts of the lid bodies 74A, 74B, and 74C 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 74A.
  • 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 74B.
  • 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 74C.
  • 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 84D and 84E, respectively.
  • a plurality of grooves 14 are formed in parts of the lid bodies 84D and 84E that face the inlet side through-holes of the flat tubes 30. Specifically, in each of the lid bodies 84D and 84E, 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 74A, 74B, and 74C are formed by cutting or the like.
  • the lid bodies 74A, 74B, and 74C 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 74A, 74B, and 74C are fitted in and temporarily fastened to the openings of the chambers A, B, and C, respectively, of the header 70, and similarly, the lid bodies 84D and 84E 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 10a 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 20a 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 74B, 84D, 84E 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 1Ba on the upstream side in the air passage direction.
  • Fig. 15 (c) is a schematic sectional view of a downstream side heat exchanging unit 1Bb 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 1A 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 1Bb are connected by an inter-line pipe 90.
  • the downstream side heat exchanging unit 1Bb has ten passes.
  • the downstream side heat exchanging unit 1Bb has more passes than the upstream side heat exchanging unit 1Ba. The reason that the number of passes differs between the upstream side heat exchanging unit 1Ba and the downstream side heat exchanging unit 1 Bb will be described later.
  • the downstream side heat exchanging unit 1Bb is the same as the upstream side heat exchanging unit 1Ba except that it differs in the configuration of the header part from the upstream side heat exchanging unit 1Ba.
  • a header 700 to which the inter-line pipe 90 is connected in the downstream side heat exchanging unit 1Bb differs in the number of partition plates from the upstream side heat exchanging unit 1Ba.
  • 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 flow of refrigerant in the upstream side heat exchanging unit 1Ba of the heat exchanger 1B is the same as that in Embodiment 2.
  • Refrigerant flowing out of the refrigerant outlet pipe 20a of the upstream side heat exchanging unit 1B flows through the inter-line pipe 90 and the refrigerant inlet pipe 100a into the chamber F of the downstream side heat exchanging unit 1 Bb.
  • the refrigerant flowing into the chamber F flows from one end to the other end of a flat tube group communicating with the chamber F, and flows into the chamber H.
  • the refrigerant flowing into the chamber H makes a U-turn here, flows from one end to the other end of another flat tube group connected to the chamber H.
  • the refrigerant flowing out of this other end merges in the chamber G, and flows through the refrigerant outlet pipe 200a to the outside.
  • the heat exchanger 1B When the heat exchanger 1B is used as an evaporator, refrigerant inflows in a two-phase gas-liquid state, and finally outflows in a state of gas refrigerant. Therefore, the quality increases as refrigerant flows toward the second half of the flow passage.
  • the quality When the quality is low, the pressure loss during passing through the flow passage is small, and therefore it is preferable to increase the flow rate of refrigerant to increase the heat transfer coefficient.
  • the quality when the quality is high, the pressure loss during passing through the flow passage is large, and therefore it is preferable to decrease the flow rate of refrigerant. The larger the number of passes, the lower the flow rate of refrigerant.
  • 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 1Bb 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 the same advantageous effects as Embodiment 1 and 2 can be obtained, and owing to the multi-line configuration, the heat exchange capacity can be improved. Since the number of passes on the upstream side in the air passage direction where the quality of passing refrigerant is low is reduced to increase the flow rate of refrigerant, and to increase the heat transfer coefficient, the heat exchange capacity can also be improved thereby.
  • 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)

Claims (12)

  1. Wärmetauscher (1), in dem ein Kältemittel parallel durch eine Vielzahl von parallel angeordneten Wärmeübertragungsleitungen (30) strömt, umfassend ein Wärmetauscher-Kopfstück (10),
    wobei eine Vielzahl von Durchgangslöchern (12), mit denen Enden von der Vielzahl von Wärmeübertragungsleitungen (30) verbunden sind, nebeneinander in einer Längsrichtung des Wärmetauscher-Kopfstücks (10) angeordnet sind,
    wobei eine Vielzahl von Kammern (A, B, C), kommunizierend mit der Vielzahl von Durchgangslöchern (12) und dienend als ein Kältemittelströmungsdurchlass, der in der Längsrichtung getrennt ist, in dem Wärmetauscher-Kopfstück (10) ausgebildet sind, und
    wobei jedes von der Vielzahl von Durchgangslöchern (12) eines ist von einem einlassseitigen Durchgangsloch und einem auslassseitigen Durchgangsloch, mit dem ein kältemitteleinlassseitiges Ende und ein kältemittelauslassseitiges Ende von der Vielzahl von Wärmeübertragungsleitungen (30) jeweils verbunden ist, und in einem Teil von jeder von der Vielzahl von Kammern (A, B, C), der den einlassseitigen Durchgangslöchern (12) in den Kammern zugewandt ist, eine Vielzahl von Nuten (14) des Wärmetauscher-Kopfstücks (10) in einer seitlichen Richtung senkrecht zu der Längsrichtung ausgebildet sind, dadurch gekennzeichnet, dass das Wärmetauscher-Kopfstück (10) eingerichtet ist, das Kältemittel durch die Wirkung der Oberflächenspannung parallel zu der Vielzahl von Wärmeübertragungsleitungen (30) zu verteilen, wobei die Vielzahl von Nuten (14) durch die Wirkung der Oberflächenspannung flüssiges Kältemittel in die Nuten ziehen.
  2. Wärmetauscher nach Anspruch 1,
    wobei jede von der Vielzahl von Kammern (A, B, C) als irgendeine von einer Einströmkammer (A), in die das Kältemittel von außen einströmt, einer U-Wendungskammer (B), dienend als ein U-Wendung-Strömungsdurchlass, und einer Ausströmkammer (C), aus der Kältemittel nach außen strömt, klassifiziert ist,
    wobei die Durchgangslöcher (12), kommunizierend mit der Einströmkammer (A), alle einlassseitige Durchgangslöcher (12) sind, und die Vielzahl von Nuten (14) über eine gesamte Länge in der Längsrichtung des Teils, bildend die Einströmkammer (A), ausgebildet sind,
    wobei Durchgangslöcher (12), kommunizierend mit der U-Wendungskammer (B), in eine einlassseitige Durchgangslochgruppe und eine auslassseitige Durchgangslochgruppe unterteilt sind, und die Vielzahl von Nuten (14) in einem Teil ausgebildet sind, der der einlassseitigen Durchgangslochgruppe zugewandt ist, und
    wobei die Durchgangslöcher (12), kommunizierend mit der Ausströmkammer (C), alle auslassseitige Durchgangslöcher (12) sind, und die Vielzahl von Nuten (14) nicht in einem Teil ausgebildet sind, der die Ausströmkammer (C) bildet.
  3. Wärmetauscher nach Anspruch 2, wobei die Vielzahl von Nuten (14) durch Zwischenräume zwischen einer Vielzahl von vorstehenden Vorsprüngen (15) ausgebildet sind, und jeweils zwei von der Vielzahl von Vorsprüngen (15), die in der U-Wendungskammer (B) ausgebildet sind, die in der seitlichen Richtung benachbart sind, sich in einer Position eines Endes unterscheiden, das einer Grenze zwischen der einlassseitigen Durchgangslochgruppe und der auslassseitigen Durchgangslochgruppe am nächsten ist.
  4. Wärmetauscher nach einem der Ansprüche 1 bis 3, wobei die Vielzahl von Nuten (14) durch Zwischenräume zwischen einer Vielzahl von vorstehenden Vorsprüngen (15) ausgebildet sind und zwei jeweils benachbarte von der Vielzahl von Vorsprüngen (15) unterschiedlich hoch sind.
  5. Wärmetauscher nach Anspruch 4, wobei Höhen der Vielzahl von Vorsprüngen (15) in der seitlichen Richtung abwechselnd groß und klein sind.
  6. Wärmetauscher nach Anspruch 4, wobei Höhen der Vielzahl von Vorsprüngen (15) eingerichtet sind, zu einem zentralen Teil in der seitlichen Richtung zunehmend größer zu sein.
  7. Wärmetauscher nach einem der Ansprüche 1 bis 6, wobei das Kopfstück (10, 70) einen Kopfstück-Hauptkörper (11, 71), der eine kastenähnliche Form mit einer offenen Seite aufweist und dessen Bodenoberfläche (11b, 71b), die der Öffnung (11a, 71a) zugewandt ist, die Vielzahl von darin ausgebildeten Durchgangslöchern (12, 72) aufweist, und einen Deckelkörper (13, 74A, 74B, 74C), der in einer plattenähnlichen Form, abdeckend die Öffnung (11 a, 71 a), ausgebildet ist, umfasst.
  8. Wärmetauscher nach Anspruch 7, wobei die Nuten (14) in dem Deckelkörper (13) ausgebildet sind.
  9. Wärmetauscher (1B), umfassend, in einer Luftdurchlassrichtung, zumindest zwei Wärmeaustauscheinheiten (1Ba, 1Bb), umfassend ein Paar der Wärmetauscher-Kopfstücke (70) nach Anspruch 2 oder 3, die in einer Richtung senkrecht zu der Luftdurchlassrichtung voneinander beabstandet sind, eine Vielzahl von Wärmeübertragungsleitungen (30), die parallel zwischen dem Paar von Wärmetauscher-Kopfstücken (70) angeordnet sind und deren beide Enden mit der Vielzahl von Durchgangslöchern (12) des Paars von Wärmetauscher-Kopfstücken (70) verbunden sind, und eine Vielzahl von Rippen (40), die so angeordnet sind, dass Luft in die Luftdurchlassrichtung strömt, wobei die Wärmeaustauscheinheiten (1Ba, 1Bb) durch eine Zwischenleitung (90) verbunden sind, und ein Kältemittelströmungsdurchlass gebildet ist, in dem das Kältemittel durch die Vielzahl von Wärmeübertragungsleitungen (30) der Wärmeaustauscheinheit (1Ba) auf einer stromaufwärtigen Seite in der Luftdurchlassrichtung von der Einströmkammer (A) zu der Ausströmkammer (C) strömt, während eine U-Wendung in der U-Wendungskammer (B) erfolgt, dann durch die Zwischenleitung (90) in die Wärmeaustauscheinheit (1Ba) auf einer stromabwärtigen Seite in der Luftdurchlassrichtung strömt, und von der Einströmkammer (F) zu der Ausströmkammer (G) des Wärmetauscher-Kopfstücks (70) strömt, während in der U-Wendungskammer (H) eine U-Wendung erfolgt, und
    wobei, wenn der Wärmetauscher (1) als ein Verdampfer genutzt wird, eine Anzahl von Kältemitteldurchlässen des Kältemittels, strömend durch die Wärmeaustauscheinheit (1Ba) auf der stromaufwärtigen Seite, geringer ist als eine Anzahl von Kältemitteldurchlässen des Kältemittels, strömend durch die Wärmeaustauscheinheit (1Bb) auf der stromabwärtigen Seite.
  10. Wärmetauscher (1, 1A, 1B) nach einem der Ansprüche 1 bis 9, wobei die Wärmeübertragungsleitungen (30) Flachleitungen sind, aufweisend eine Vielzahl von Durchgangslöchern (12), dienend als Kältemittelströmungsdurchlässe.
  11. Kältekreislaufvorrichtung (50), umfassend einen Wärmetauscher (1) nach einem der Ansprüche 1 bis 10.
  12. Klimaanlage, umfassend die Kältekreislaufvorrichtung (50) nach Anspruch 11.
EP13780882.0A 2012-04-26 2013-04-23 Wärmetauscherkopf und wärmetauscher damit Active EP2865983B1 (de)

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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
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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ES2883139T3 (es) 2021-12-07
US20150053384A1 (en) 2015-02-26
CN203464829U (zh) 2014-03-05
CN104285121A (zh) 2015-01-14
EP2865983A4 (de) 2016-05-25
WO2013160956A1 (ja) 2013-10-31
CN104285121B (zh) 2016-10-12
EP2865983A1 (de) 2015-04-29
WO2013161795A1 (ja) 2013-10-31

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