CN104428622A - Heat exchanger - Google Patents
Heat exchanger Download PDFInfo
- Publication number
- CN104428622A CN104428622A CN201380036190.6A CN201380036190A CN104428622A CN 104428622 A CN104428622 A CN 104428622A CN 201380036190 A CN201380036190 A CN 201380036190A CN 104428622 A CN104428622 A CN 104428622A
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- China
- Prior art keywords
- core body
- flow
- fluid
- rectification part
- heat exchanger
- Prior art date
- Legal status (The legal status 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 status listed.)
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Classifications
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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
- 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
- F28D7/005—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 for only one medium being tubes having bent portions or being assembled from bent tubes or being tubes having a toroidal configuration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
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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
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0006—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the plate-like or laminated conduits being enclosed within a pressure vessel
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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
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0062—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by spaced plates with inserted elements
- F28D9/0068—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by spaced plates with inserted elements with means for changing flow direction of one heat exchange medium, e.g. using deflecting zones
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- 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
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- 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
- F28F9/028—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using inserts for modifying the pattern of flow inside the header box, e.g. by using flow restrictors or permeable bodies or blocks with channels
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- 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
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
- F28F2009/222—Particular guide plates, baffles or deflectors, e.g. having particular orientation relative to an elongated casing or conduit
Abstract
A first passage of a heat exchanger is configured to contain a plurality of channels connecting an inlet opening to a core inlet face and an outlet opening to an outlet face and so that the flow path resistance differs between the plurality of channels. The heat exchanger comprises a first type rectifying member, disposed in the inlet face side of the core, capable of equalizing the dynamic pressure distribution for the inlet face of a first fluid flowing in the core, and a second type rectifying member provided so as to decrease the difference in the through-flow rate caused by the difference in the flow path resistance between the plurality of channels.
Description
Technical field
Technology disclosed herein relates to a kind of heat exchanger, particularly can to the structure of the heat exchanger that the bias current of the fluid by heat transfer part that is core body (core) suppresses.
Background technology
Up to the present, knownly the flow distribution of the fluid of the core body by heat exchanger is caused not to be uniform but unbalance Biased flow phenomenon by the general collection mould assembling of heat exchanger or the shape of nozzle and arranging etc.Such as in patent document 1, describe a kind of plate fin type heat exchanger, in plate fin type heat exchanger, due to general collection mould assembling shape in from the aperture position of flow nozzle towards fluid inflow direction by the inboard elongated shape extended, cause core body away from nozzle opening by inner part by flow more than passing through flow close to nozzle opening with front part.The summary of the invention be arranged on by buffer board (rectification body) in this plate fin type heat exchanger in general collection mould assembling is described in patent document 1.Flowed into the flow interference buffer board in general collection mould assembling by nozzle, thus flow to being suppressed by inboard flowing of general collection mould assembling, be suppressed by the bias current of the fluid of core body.
Describe a kind of plate fin type heat exchanger in patent document 2, this plate fin type heat exchanger has the general collection mould assembling that the upper end position that opens wide from flow nozzle extends below vertical.Technology as described below is described: in this plate fin type heat exchanger in patent document 2, from the bottom-up outstanding cylindric rectification body in general collection mould assembling, the flowing path section near the bottom in general collection mould assembling is reduced by arranging, suppress the fluid flowed in general collection mould assembling via introducing port to flow into the situation of the bottom side of general collection mould assembling thus down, thus suppress the bias current by the fluid of core body.
On the other hand, in patent document 3 and patent document 4, describe a kind of multi tube heat exchanger, this multi tube heat exchanger has flow nozzle and to open wide and from here until the general collection mould assembling of shape that expands gradually of core body to central part.In these patent documents, describe following technology: in multi tube heat exchanger, by near the opening that rectification body is arranged on nozzle, make the fluid stream flowed into by nozzle collide rectification body to external diffusion, suppress the bias current of the fluid by core body thus.
At first technical literature
Patent document
Patent document 1: Japanese Laid-Open Patent Publication Laid-Open 2002-310593 publication
Patent document 2: Japanese Laid-Open Patent Publication Laid-Open 2007-71434 publication
Patent document 3: the clear 50-139454 publication of Japanese Laid-Open Patent Publication Laid-Open
Patent document 4: Japanese Laid-Open Patent Publication Laid-Open 2001-248980 publication
Summary of the invention
-invent technical problem to be solved-
Suppress the bias current by the fluid of core body as above, which increase the heat exchanger effectiveness of core body, such as, be conducive to the miniaturization etc. of heat exchanger.Wherein, the bias current that may produce in the heat exchanger described in above-mentioned patent document 1 ~ 4 be the core body that opened wide at multiple inflow entrance by the dynamic pressure of the fluid for flowing into core body inflow face on unevenly caused by distribution.The rectification body be documented in each patent document all has by reducing high dynamic pressure to make for the as far as possible evenly such function of the dynamic pressure in the inflow face of core body.
On the other hand, the research according to present inventor finds, even if under such circumstances different at the flow path resistance of the multiple streams such as forming core body, also bias current can occur by the fluid of core body.Such as at the core body of plate fin type heat exchanger, the each passage separated by the corrugated fin be arranged in path is equivalent to stream, according to the distributor fins of flow direction arranging alter in path, flow path length from inflow entrance to flow export is different between channels, thus flow path resistance is different.In addition, at the core body of multi tube heat exchanger, each pipe according to being equivalent to stream is bent to U-shaped, and flow path length is different in each pipe, thus flow path resistance is different.At the core body of plate fin type heat exchanger or the core body of multi tube heat exchanger, according to the difference of flow path resistance in each passage, relatively increased by the flow of the relatively low passage of flow path resistance, on the other hand, relatively reduced by the flow of the relatively high passage of flow path resistance, consequently, by the fluid generation bias current of core body.Also exist by the poor bias current caused of the flow path resistance of the stream the forming core body situation different from the deflection of the bias current caused by the dynamic pressure of fluid on above-mentioned inflow face, even if thus be provided with as in patent document 1 ~ 4 record rectification body, can not be eliminated.
Technology disclosed herein proposes in view of described problem, its object is to: the bias current suppressing the fluid of the core body by heat exchanger.
-in order to technical solution problem technical scheme-
Present inventor for these the 2 kinds of bias current occurrence causes of flow path resistance difference between the dynamic pressure in the inflow face of core body and many passages of core body for fluid-phase, arranges 2 kinds of rectification parts of different structure respectively, suppresses the bias current of the fluid by core body.
Relate to a kind of heat exchanger comprising core body in this concrete disclosed technology, this core body at least has the first path for first fluid flowing and the alternate path for second fluid flowing and at least between above-mentioned first fluid and above-mentioned second fluid, carries out heat exchange.
The inflow face flowed into for above-mentioned first fluid and the effluent face flowed out for above-mentioned first fluid is respectively arranged with at above-mentioned core body, at least above-mentioned first path is configured to, comprise many passages connecting inflow entrance and the flow export opened wide to above-mentioned effluent face opened wide to above-mentioned inflow face, and the flow path resistance difference between above-mentioned many passages.
Above-mentioned heat exchanger also comprises: the first rectification part, and it is arranged on the side, above-mentioned inflow face of above-mentioned core body and realizes flowing into the above-mentioned first fluid of above-mentioned core body relative to the homogenising of the dynamic pressure in this inflow face; And the second rectification part, its be configured to reduce by form above-mentioned core body above-mentioned first path above-mentioned many passages between flow path resistance difference cause pass through difference in flow.
Wherein, " many passages " except comprising passage each other except segregate structure, also comprising passage is not be isolated completely each other, and fluid is in fact along the structure of channel flow.
According to this structure, such as, in the heat exchanger causing first fluid uneven relative to the dynamic pressure in the inflow face of core body by the inflow general collection mould assembling being connected to core body or the structure etc. of flow nozzle that is arranged on this general collection mould assembling, the first rectification part is arranged on the side, inflow face of core body, distributes equably to realize this dynamic pressure.This first rectification part such as can be made up of deflector etc., and this deflector such as reduces this dynamic pressure by interference from the flowing of the first fluid of flow nozzle inflow.
On the other hand, between many passages of the first path forming core body, such as in the heat exchanger producing flow path resistance difference, the first rectification part is provided with the second rectification part because flow path length is different or flow diameter is not equal.What the second rectification part was caused by flow path resistance difference with reduction is arranged by the mode of difference in flow.Particularly, for the passage that flow path resistance is relatively low, the second rectification part at least by restriction first fluid inflow flow or flow out flow, even if thus between many passages, produce flow path resistance difference, also reduce the difference in flow by each passage.
Like this, by arranging the first rectification part and these 2 kinds of rectification parts of the second rectification part, can effectively suppress simultaneously the bias current that the dynamic pressure in the inflow face of core body caused by fluid-phase and by core body many passages between the bias current that causes of flow path resistance difference, the heat exchanger effectiveness of heat exchanger can be improved.This is such as conducive to the miniaturization of heat exchanger.
Core body is not limited to carry out heat exchange between first fluid and these 2 kinds of fluids of second fluid, and it can also be configured to carry out heat exchange between the fluid more than 3 kinds.
Above-mentioned the second rectification part can also be arranged on the above-mentioned effluent face side of above-mentioned core body.As mentioned above, the second rectification part, by regulating the inflow flow of the first fluid between many passages in the inflow side of the first path or regulating the outflow flow of the first fluid between many passages in the outflow side of the first path, is reduced by difference in flow.The second rectification part can also be arranged on the one party in the side, inflow face of core body and effluent face side.
But, owing to being provided with the first rectification part in side, the inflow face of core body, so when sometimes also can there is the side, inflow face for the second rectification part being arranged on core body, such as because of installation space the reason such as restriction and be difficult to the situation that 2 kinds of rectification parts are set.
As described below, the second rectification part can be made up of the plate-shaped member being formed through multiple hole with the set-up mode of regulation.As long as the second rectification part with by suitably change be formed through on this second rectification part the diameter in hole, the quantity in hole and/or hole interval the mode pockety of the aperture opening ratio of the second rectification part (area in the hole in per unit area) is formed.On the other hand, the effluent face of the core body that the inflow face of the core body arranged at uniform intervals at the inflow entrance of each passage or flow export are arranged at uniform intervals is set with the flow path resistance distribution of the flow path resistance reflecting each passage, therefore, the second rectification part and inflow face or effluent face are relatively arranged so that the distribution character of the aperture opening ratio of the second rectification part corresponds to the flow path resistance distribution character of inflow face or effluent face.That is, if the position that the flow path resistance being arranged to the low position of aperture opening ratio and inflow face or effluent face is low is relative, then flow is flowed out in the passage that flow path resistance is relatively low, at least realize restriction first fluid inflow flow or restriction.
When the second rectification part of this structure is arranged on the side, inflow face of core body, if be arranged on the position away from this inflow face, then along with passing through the second rectification part, the effect setting the difference in flow of the first fluid corresponding with the distribution of aperture opening ratio reduced before the inflow face of arrival, thus can not play the function as the second rectification part.Therefore, expect the second rectification part to be arranged on the position near inflow face.
On the other hand, in the downstream of the second rectification part with multiple through hole, be equivalent to produce larger velocity gradient between the opening portion of through hole and the non-opening portion being equivalent to the part beyond through hole, if so make the second rectification part too near inflow face, then this velocity gradient is affected and is flowed into by the first fluid of the inflow entrance of each passage opened wide to the inflow face of core body.In other words, the inflow flow that first fluid flows into the passage that inflow entrance is relative with through hole increases, and on the other hand, first fluid flows into the inflow entrance passage not relative with through hole hardly.Now not only can not play the function of the second rectification part, but also there is the possibility by difference in flow expanded between many passages.Therefore, when being difficult to regulate the situation of its setting position more when the side, inflow face of core body arranges the second rectification part.
Relative to this, the second rectification part is arranged in the structure of effluent face side of core body, owing to the first rectification part and the second rectification part to be disposed on side, inflow face and the effluent face side of core body, so easily guarantee the first rectification part and the second rectification part installation space separately.In addition, when the second rectification part and effluent face with multiple through hole are relatively arranged, easily function is played when effluent face is arranged, on the other hand, different from the situation of side, the inflow face of being arranged on, owing to not needing the velocity gradient in the downstream considering the second rectification part, thus there is the second rectification part the higher such advantage of the free degree is set.
Therefore, when the second rectification part is arranged on the effluent face side of core body, be conducive to reliably guaranteeing its function and more freely arranging.
At the above-mentioned effluent face of above-mentioned core body, be provided with the above-mentioned flow export of above-mentioned many passages at uniform intervals, and reflection has the flow path resistance of the regulation corresponding with the flow path resistance of above-mentioned each passage to distribute, above-mentioned the second rectification part is the plate-shaped member relatively arranged at least partially with above-mentioned effluent face, multiple holes that above-mentioned the second rectification part has run-through board thickness direction and formed, can also being set to by the aperture opening ratio that above-mentioned multiple hole limits of above-mentioned the second rectification part, there is the corresponding distribution character that to distribute with the flow path resistance being reflected in above-mentioned effluent face.
At this, as long as the distribution character of the aperture opening ratio of the second rectification part is set to as follows: distribute accordingly with the flow path resistance being reflected in effluent face, increase the aperture opening ratio of the high part of flow path resistance so that fluid easily passes through, and reduce the aperture opening ratio of the low part of flow path resistance so that fluid is difficult to pass through.By such setting, even if there is flow path resistance difference between many passages, also regulated by the flow of the first fluid of each passage by the second rectification part, thus suppress to pass through difference in flow between many passages.That is, the bias current that the flow path resistance difference between suppressing by many passages causes.
Above-mentioned core body can also be the plate-fin core body that many above-mentioned first paths and many above-mentioned alternate paths are alternately laminated, and is provided with the distributor fins of the flow direction changed in this first path at least each above-mentioned first path.
Namely, by arranging distributor fins in the first path of the core body formed in plate-fin mode, thus the flow path length difference between many passages, produce flow path resistance thus poor, and above-mentioned the second rectification part reduce by this flow path resistance difference cause by difference in flow, so suppress the bias current by the fluid of core body.
-invention effect-
As described above, according to above-mentioned heat exchanger, by arranging the first rectification part and the second rectification part independently, effectively can suppress the bias current of heat exchanger, be conducive to the miniaturization improving heat exchanger effectiveness and heat exchanger, wherein, the first rectification part above-mentioned for suppressing the bias current caused for the dynamic pressure in the inflow face of core body by fluid-phase, the bias current that above-mentioned the second rectification part causes for the flow path resistance difference between suppressing by many passages of core body.
Accompanying drawing explanation
At Fig. 1, (a) is the front view that a part for the structure representing heat exchanger briefly is cut, and (b) is the side view that a part for the structure representing heat exchanger briefly is cut.
Fig. 2 is the front view exemplarily representing the first rectification part.
Fig. 3 is the front view exemplarily representing the second rectification part.
Fig. 4 is the front view of the second rectification part representing the shape different from Fig. 3.
Fig. 5 is figure that represent the heat exchanger of the second rectification part being provided with the structure different from Fig. 1, that be equivalent to Fig. 1.
Fig. 6 represents figure that be provided with the heat exchanger of the second rectification part in the inflow side of the first path, that be equivalent to Fig. 1.
Fig. 7 represents figure that eliminate the heat exchanger of the first rectification part, that be equivalent to Fig. 1.
Detailed description of the invention
Below, be described based on the embodiment of accompanying drawing to heat exchanger.Wherein, following is exemplary for illustrating of preferred embodiment.Fig. 1 represents the structure of the heat exchanger 1 in embodiment briefly.(a) of Fig. 1 is equivalent to the side view of heat exchanger 1 relative to the front view of heat exchanger 1, (b).In addition, for convenience of explanation, the paper above-below direction of Fig. 1 (a) is called X-direction, left and right directions is called Y-direction, the paper left and right directions of Fig. 1 (b) is called Z-direction.
This heat exchanger 1 has the plate-fin core body 2 carrying out heat exchange between first fluid and second fluid.As shown in Fig. 1 (a), core body 2 is that the first path 21 flowed for first fluid is alternately laminated across tube sheet 23 in the Y direction with the alternate path 22 flowed for second fluid.In legend, core body 2 has compares the X-direction length shown in Fig. 1 (a) and Y-direction length, the rectangular shape that the Z-direction length shown in Fig. 1 (b) is short.Wherein, the shape of core body 2 is not limited to such shape, but can adopt various shape.
As shown in solid arrow, first fluid to flow into from the upper surface of core body 2 in first path 21 and in core body 2 after current downflow, flows out from the side of the bottom of core body 2 to Z-direction.As shown in hollow arrow, second fluid to flow into from the lower surface of core body 2 in alternate path 22 and in core body 2 after flowing upward, flows out from the side of the upper end of core body 2 to Z-direction.Like this, core body 2 is configured to the so-called convection core body that first fluid and second fluid flow in an opposing fashion.But the structure of core body 2 is not limited to this, it can also be that first fluid is set to parallel flow type core body identical mutually with the flow direction of second fluid, also can be the mutually orthogonal positive AC type core body of the flow direction of first fluid and second fluid.
As schematically showing of Fig. 1 (b), in each first path 21 of core body 2, be provided with corrugated fin 211, each first path 21 is divided into many passages side by side in z-direction by this corrugated fin 211.Wherein, as corrugated fin 211, the multiple corrugated fin 211 such as plane, porous type can be adopted.In addition, in each alternate path 22, be also provided with corrugated fin, each alternate path is also divided at Z-direction many passages side by side by this corrugated fin further, omits diagram at this.Further, such as, sawtooth (serrate) type fin can also be arranged in each first and/or alternate path 21,22, omit diagram at this.In this case, although many passages are not exclusively isolated, but fluid mainly flows in X direction in the mode along fin, therefore identical with the situation being separated into many passages in fact.
The outflow side of bottom corresponding to core body 2 in each first path 21 is also provided with distributor fins 212, the flow direction in the first path 21 thus from X-direction downward to the horizontal direction become in Z-direction (paper of Fig. 1 (b) is towards left direction).In addition, the outflow side corresponding to the upper end of core body 2 in each alternate path 22 is also provided with distributor fins 222, and the flow direction in alternate path 22 is thus from the horizontal direction (paper of Fig. 1 (b) is towards right direction) upwardly-directed changed in Z-direction X-direction.
Like this, in the core body 2 of rectangular shape, this upper surface gains the first rank the inflow face 31 of body, the effluent face 32 of body and the side of the bottom of core body 2 gains the first rank.On the other hand, the lower surface of core body 2 becomes the inflow face 33 of second fluid, and the side on the top of core body 2 becomes the effluent face 34 of second fluid.
For the core body 2 formed like this, each passage for first fluid being distributed to each first path 21 is installed and the inflow general collection mould assembling 41 flowed into wherein in the inflow face of first fluid 31.Corresponding to the shape in the inflow face 31 of first fluid, this inflow general collection mould assembling 41 has the elongated shape extended along Y-direction, is provided with the flow nozzle 411 flowed into for first fluid at the central part of the Y-direction flowing into general collection mould assembling 41.On the other hand, the outflow general collection mould assembling 42 of flowing out after the first fluid set be provided with for making by each passage of each first path at the effluent face 32 of the first fluid of core body 2.This outflow general collection mould assembling 42 also has the elongated shape extended along Y-direction, is provided with the mass flowing nozzle 421 flowed out for first fluid at the central part of the Y-direction flowing out general collection mould assembling 42.In addition, the inflow face of second fluid 33 is provided with and flows into general collection mould assembling 43, and at the effluent face 34 of second fluid, outflow general collection mould assembling 44 is installed.The inflow general collection mould assembling 43 of second fluid and flow out general collection mould assembling 44 and have with the inflow general collection mould assembling 41 of first fluid and flow out the identical formation of general collection mould assembling 42, and central part is in the Y direction provided with flow nozzle 431 and mass flowing nozzle 441 respectively.
At this heat exchanger 1, for the first path 21 of first fluid flowing and for the alternate path 22 of second fluid flowing, the first rectification part 51 and these 2 kinds of rectification parts of the second rectification part 52 are installed at each.The first rectification part 51 is arranged on and flows in general collection mould assembling 41,43.The first rectification part 51 is configured to, and realizes the homogenising of fluid-phase for the dynamic pressure in the inflow face 31 of first fluid and the inflow face 33 of second fluid.That is, core body 2 and inflow general collection mould assembling 41,43 all have the elongated shape extended along Y-direction, and on the other hand, flow nozzle 411,431 is arranged on the central part of the Y-direction flowing into general collection mould assembling 41,43.Further, the length flowing into the X-direction of general collection mould assembling 41,43 is shorter.As a result, flow into the fluid flowed in general collection mould assembling 41,43 to be difficult to Y and Z-direction diverging flow.When the flow velocity of the fluid flowed into by flow nozzle 411,431 is fast, such tendency is remarkable especially.This causes phenomenon as described below: by high for the areas adjacent hydrodynamic that the opening of flow nozzle 411,431 projects to inflow face 31,33, on the other hand, the hydrodynamic of the exterior lateral area in this region is relatively low, and it is uneven for the dynamic pressure in inflow face 31,33 that the hydrodynamic flowing into the edge, periphery in face 31,33 then reduces such fluid-phase further.Uneven dynamic pressure like this causes bias current as described below: many by the flow of the fluid of the path of the central side of Y-direction, on the other hand, is reduced by the flow of the fluid of the path of the both sides of Y-direction.In the core body 2 of legend, the bias current caused by the inhomogeneities of dynamic pressure is equivalent in the first path 21 of core body 2 and the bias current on the stacked direction of alternate path 22.
The first rectification part 51 has realization makes fluid-phase for the uniform function of dynamic pressure in this inflow face 31,33.Particularly, the first rectification part 51 of legend is made up of the deflector of the tabular near the opening being arranged on flow nozzle 411,431, and above-mentioned flow nozzle 411,431 is arranged on the centre flowing into general collection mould assembling 41,43.As shown in Fig. 2 amplifies, be formed with multiple through holes 511 of run-through board thickness direction at the first rectification part 51, through hole 511 each other diameter is identical and be almost disposed at equal intervals.
The first rectification part 51 has Y-direction length bigger compared with the opening size of flow nozzle 411,431.The mode of the flowing of the fluid that this first rectification part 51 flows into traverse through flow nozzle 411,431 is arranged, and such as shown in Fig. 1 (b), it is waited by welding and is fixed on the inwall flowing into general collection mould assembling 41,43.
The first rectification part 51 like this disturbs the fluid stream being flow into by flow nozzle 411,431 and flow in general collection mould assembling 41,43.A part for fluid is passed through the through hole 511 of the first rectification part 51 and flows directly to X-direction, on the other hand, residual fluid, as shown in the solid arrow of Fig. 1 (a), changes its flow direction in the mode walking around the first rectification part 51, thus to Y-direction diverging flow.Consequently, fluid-phase is uniform for the dynamic pressure in inflow face 31,33, thus suppress first and alternate path 21,22 stacked direction on flow into the fluid generation bias current of core body 2.In other words, the homogenising flowing to the influx of many first paths 21 and many alternate paths 22 is realized.This is conducive to the heat exchanger effectiveness improving heat exchanger 1.
Wherein, compare the situation of the position the first rectification part 51 being arranged on the inflow face 31,33 near core body 2, when the first rectification part 51 being arranged on the position closer to flow nozzle 411,431 opening, further raising to enter the dispersiveness of the fluid flowed in general collection mould assembling 41,43 at flow nozzle 411,431 by co-current flow, thus be conducive to preventing first and alternate path 21,22 stacked direction on bias current.In addition, change, as long as the size of the size of the first rectification part 51, through hole 511, quantity and configuration and setting position thereof suitably set according to the state of this dynamic pressure according to the size in inflow face 31,33, the shape flowing into general collection mould assembling 41,43, the shape of flow nozzle 411,431 and the inflow velocity of setting and fluid etc. relative to the dynamic pressure in inflow face 31,33.Through hole can also be omitted as required.In addition, polylith deflector can also be set in general collection mould assembling 41,43.
In contrast, different from the first rectification part 51, the second rectification part 52 has the function by difference in flow that the flow path resistance between reducing by many passages of each first path 21 and each alternate path 22 causes.Namely, as mentioned above, each first path 21 of this core body 2 and each alternate path 22 are provided with distributor fins 212,222, thus, the flow path length from its inflow entrance to flow export of the passage separated by corrugated fin 211 and distributor fins 212,222 in each path 21,22 is different.In the example shown in Fig. 1 (b), relative to the effluent face 32 of the first path 21, the flow path length with the passage of the flow export that relatively top side is opened wide is relatively short, and the flow path length with the passage of the flow export relatively opened wide on the lower is relatively long.The flow path resistance that the difference of such flow path length produces between passage is poor, and flow path resistance difference produces the difference in flow by the fluid between passage.That is, in the first path 21 of legend, relative to effluent face 32, relatively many by the flow of the passage with the flow export that relatively top side is opened wide, relatively less by the flow of the passage with the flow export relatively opened wide on the lower.In addition, at the effluent face 34 of alternate path 22, because the flow path length of the passage with the flow export that relatively top side is opened wide is relatively long, so relatively few at this flow passed through, because the flow path length of the passage with the flow export relatively opened wide on the lower is relatively short, so relatively many at this flow passed through, omit diagram at this.The flow path resistance corresponding with the flow path resistance of passage is had to distribute in effluent face 32,34 reflection.In the core body 2 of legend, the bias current caused by the flow path resistance difference between many passages is equivalent to the bias current in Z-direction (width).
Be different from the first rectification part 51, have and the second rectification part 52 of the function that the bias current caused by the flow path resistance difference between many such passages suppresses is arranged in outflow general collection mould assembling 42,44.Particularly, the second rectification part 52 by flow out in general collection mould assembling 42,44 to be formed with the plate-shaped member that effluent face 32,34 relative modes are arranged near this effluent face 32,34.This second rectification part 52 is also such as fixed by welding on the inwall of outflow general collection mould assembling 42,44.
As shown in Figure 3, the second rectification part 52 is also formed with multiple identical with the first rectification part 51, that diameter is identical mutually through hole 521 in the mode of run-through board thickness direction.On the other hand, the through hole 521 of the second rectification part 52 is not what be disposed at equal intervals, but the interval being arranged in the paper upper portion of Fig. 3 is relatively wide, the interval relative narrower of paper lower portion.Thus, the aperture opening ratio (area in the hole in per unit area) of the second rectification part 52 is relatively low in upper portion, lower portion is then relatively high.Such the second rectification part 52 is installed in the mode corresponding with the distribution of the flow path resistance be reflected on above-mentioned effluent face 32,34.Namely, be mounted to as follows: the flow export of the part low passage relative to the flow path resistance of effluent face 32,34 that the aperture opening ratio of the second rectification part 52 is low is relative, the flow export of the part high passage relative to the flow path resistance of effluent face 32,34 that the aperture opening ratio of the second rectification part 52 is high is relative.Particularly, as shown in Figure 3, for the effluent face 32 of first fluid, the state that the second rectification part 52 is downside with the part that the part that aperture opening ratio is low is upside, aperture opening ratio is high is installed.On the other hand, for the effluent face 34 of second fluid, the second rectification part 52 with under the state shown in Fig. 3 by the state of turned upside down, the part that the part that namely aperture opening ratio is low is downside, aperture opening ratio is high be upside state be mounted.By such setting, the part that the flow export of the passage that flow path resistance is relatively low is low with the aperture opening ratio of the second rectification part 52 is relative, so fluid is difficult to flow out, on the other hand, the part that the flow export of the passage that flow path resistance is relatively high is high with the aperture opening ratio of the second rectification part 52 is relative, so fluid easily flows out.As a result, even if produce flow path resistance difference between many passages, also can be reduced by the difference in flow of the fluid of many passages.That is, can be suppressed by many passages by the second rectification part 52 between the bias current that causes of flow path resistance difference.This is conducive to the heat exchanger effectiveness improving heat exchanger 1.
When the second rectification part 52 is arranged on relatively on the position of effluent face 32,34, suppress to cause high by the effect of difference in flow by flow path resistance difference.If this is on the position owing to being arranged on by the second rectification part 52 away from effluent face 32,34, then the effect that the aperture opening ratio by reducing the second rectification part 52 limits the outflow flow flowed out from passage can reduce.
Like this, by arranging the first rectification part 51 and these 2 kinds of rectification parts of the second rectification part 52, the bias current that the dynamic pressure in the inflow face 31,33 of core body 2 caused by fluid-phase (being the bias current on the stacked direction of the first path 21 and alternate path 22 in legend) and by core body 2 many passages between the bias current (being the bias current on the width of core body 2 in legend) that causes of flow path resistance difference can both be inhibited.That is, respectively according to 2 kinds of bias currents that these 2 kinds of rectification parts of the first rectification part 51 and the second rectification part 52 suppress generation mechanism different, thus reliably can suppress each in 2 kinds of bias currents, improve the heat exchanger effectiveness of heat exchanger 1 thus.
Wherein, in the second rectification part 52 exemplarily represented in figure 3, change aperture opening ratio by the interval that arranges changing the identical through hole 521 of diameter, but, unlike this, aperture opening ratio can also be changed by changing with the diameter of identical spaced through hole.In addition, can also by changing the diameter of through hole and arranging the aperture opening ratio that interval both sides change the second rectification part 52.
In addition, the shape of the through hole of the second rectification part 52 is not limited to the circular hole exemplarily represented in figure 3, such as shown in Figure 4, can also be the through hole 531 of long hole shape.In addition, change the size of the through hole 531 of long hole shape in the example shown in Figure 4 and interval both sides are set, but interval can also be set change aperture opening ratio by only changing size or only changing.
In addition, the aperture opening ratio of the second rectification part 52 can change as shown in Figure 3 in the X direction continuously, also can periodically change in the X direction as shown in Figure 4.
The second rectification part 52 except be arranged to relative with whole of effluent face 32,34 except, such as also can as shown in Figure 5, that is arranged to only with effluent face 32 is relative at least partially.Fig. 5 illustrates the example arranged in the mode relative with the effluent face 32 of about half by the second rectification part 52 for the first path 21.The part not being provided with the second rectification part 52 is of equal value with the situation expanding aperture opening ratio.
In addition, the second rectification part 52 can also be arranged on and flow in general collection mould assembling 41, replace being arranged on this and flow out in general collection mould assembling 42.The second rectification part 52 that Fig. 6 shows for the first path 21 is arranged on the example flowed in general collection mould assembling 41.As long as this second rectification part 52 is also be made up of the plate-shaped member changing aperture opening ratio such as shown in Figure 3,4.By relatively installing this second rectification part 52 so that the distribution of its aperture opening ratio is corresponding with the distribution of the flow path resistance in inflow face 31 with inflow face 31, thus the flow flowing to each passage can be regulated according to its flow path resistance, reduce thus to pass through difference in flow between many passages.
When the second rectification part 52 relatively being arranged with inflow face 31, when being also and arranging near inflow face 31, play the function suppressing bias current fully, from but preferred.In other words, the difference in flow of the fluid that this passes through is set in by changing the aperture opening ratio being arranged on the second rectification part 52 flowed in general collection mould assembling 41, and then setting is to the inflow difference in flow flowing into face 31 and flow into, and reduces thus to pass through difference in flow between many passages.Therefore, if the second rectification part 52 is arranged on the position away from inflow face 31, then before arrival inflow face 31, the effect setting the difference in flow of fluid according to situation about passing through at the second rectification part 52 reduces.On the other hand, if make the second rectification part 52 too near inflow face 31, then the fluid that the velocity gradient of the fluid produced between through hole 521 part (i.e. opening portion) of the second rectification part 52 and part in addition (i.e. non-opening portion) can affect the inflow face of have passed 31 flows into each passage.Particularly, the inflow flow of the inflow entrance relative with opening portion increases, and on the other hand, fluid flows into the inflow entrance relative with non-opening portion hardly.The function that not only can not play the second rectification part 52 such by difference in flow reduced between many passages can be there is like this, and expand this possibility by difference in flow.Like this, when the second rectification part 52 is installed on inflow general collection mould assembling 41, be sometimes difficult to adjust its setting position.In contrast, as shown in Fig. 1 etc., the second rectification part 52 is arranged on when flowing out general collection mould assembling 42, does not need to consider to have passed the velocity gradient after the second rectification part 52.Therefore, the free degree that arranges of the second rectification part 52 improves, thus the bias current that the flow path resistance difference between can effectively suppressing by many passages causes.
In addition, flow in general collection mould assembling 41 because the first rectification part 51 is arranged on, be installed in inflow general collection mould assembling 41 so situation about being arranged on by the second rectification part 52 in inflow general collection mould assembling 41 is equivalent to 2 kinds of rectification parts 51,52.Therefore, according to the structure of the structure or flow nozzle 411 that flow into general collection mould assembling 41, sometimes also there is the situation that 2 kinds of rectification parts 51,52 can not be arranged in the mode giving full play to respective function.Owing to being arranged on by the second rectification part 52, situation about flowing out in general collection mould assembling 42 is equivalent to the first, the second rectification part 51,52 is disposed on inflow side and the outflow side of core body 2, thus be conducive to arranging best the first, each in the second rectification part 51,52.
Such as shown in Figure 7, at fluid-phase in the dynamic pressure flowing into face 31 almost uniform heat exchanger 10, the first rectification part can also be omitted.In other words, the path of the first fluid of Fig. 7 is formed as conduit 44,45, and thus, first fluid is almost uniform for the dynamic pressure in the inflow face 31 in core body 2.Therefore, the first rectification part is removed.On the other hand, identical with above-mentioned explanation, owing to being at least provided with distributor fins 212, so produce flow path resistance difference between many passages in each first path 21 of core body 2.So, in the heat exchanger 10 shown in Fig. 7, the second rectification part 52 and effluent face 32 are relatively arranged, thereby, it is possible to avoid meeting be caused by flow path resistance difference, the bias current of first fluid on the width of core body 2.Wherein, in the example shown in Fig. 7, the second rectification part 52 can also be arranged on the inflow side of core body 2.
According to the structure of heat exchanger, the situation one party only in the stream of first fluid and the stream of second fluid arranging the first and/or the second rectification part sometimes can also be there is.
Suppress the first rectification part of the bias current caused by dynamic pressure to be not limited to be made up of deflector, according to structure and the setting of the structure or flow nozzle that flow into general collection mould assembling, it can also adopt the rectification part of known various structure.
At this, to have the heat exchanger 1,10 of plate-fin core body 2, the first and the second rectification part are described, but the first and the second rectification part can also be there is are applied to situation in multi tube heat exchanger.In multi tube heat exchanger, such as, in the pipe structure bending with U-shaped, produce flow path resistance difference, thus can bias current be produced.In such multi tube heat exchanger, the second rectification part also suppresses bias current effectively.
In any one in plate fin type heat exchanger and multi tube heat exchanger, all exist and not only cause flow path resistance poor by flow path length difference, and also cause the situation of flow path resistance difference by the difference of flowing path section product moment and flow path length and sectional area both sides.For any one wherein, the second rectification part all can reduce by flow path resistance difference cause pass through difference in flow.
-industrial applicability-
As described above, heat exchanger disclosed herein can carry out the bias current of suppression fluid according to the first rectification part and the second rectification part, therefore the heat exchanger effectiveness improving various heat exchanger is conducive to, wherein, the first rectification part realizes the homogenising that fluid convection enters the dynamic pressure in face, and what the reduction of the second rectification part was caused by the flow path resistance difference between many passages passes through difference in flow.In addition, owing to realizing the homogenising by the fluid flow of each passage, therefore, such as for being built-in with catalyst carrier and making the fluid passed through at this react the heat exchanger (i.e. hydrogen-catalyst reactor) of such purposes in each passage, be conducive to improving reaction efficiency, and then be conducive to improving performance.
-symbol description-
1-heat exchanger; 10-heat exchanger; 2-core body; 21-first path; 22-alternate path; 211-corrugated fin; 212,222-distributor fins; 31,33-flows into face; 32,34-effluent face; The first rectification part of 51-; 52-the second rectification part; 521,531-through hole
Claims (4)
1. a heat exchanger, it comprises core body, and this core body at least has the first path of confession first fluid flowing and supplies the alternate path of second fluid flowing and at least between described first fluid and described second fluid, carry out heat exchange, it is characterized in that,
The inflow face flowed into for described first fluid and the effluent face flowed out for described first fluid is respectively arranged with at described core body,
At least described first path comprises many passages connecting inflow entrance and the flow export opened wide to described effluent face opened wide to described inflow face, and the flow path resistance difference between described many passages,
Described heat exchanger also comprises:
The first rectification part, it is arranged on the side, described inflow face of described core body and realizes flowing into the described first fluid of described core body relative to the homogenising of the dynamic pressure in this inflow face; And
The second rectification part, its be configured to reduce by form described core body described first path described many passages between flow path resistance difference caused by pass through difference in flow.
2. heat exchanger according to claim 1, is characterized in that,
Described the second rectification part is arranged on the described effluent face side of described core body.
3. heat exchanger according to claim 2, is characterized in that,
At the described effluent face of described core body, be provided with the described flow export of described many passages at uniform intervals, and reflection there is the flow path resistance of the regulation corresponding with the flow path resistance of described each passage to distribute,
Described the second rectification part is the plate-shaped member relatively arranged at least partially with described effluent face, multiple holes that described the second rectification part has run-through board thickness direction and formed,
The aperture opening ratio limited according to described multiple hole of described the second rectification part has the corresponding distribution character that to distribute with the flow path resistance being reflected in described effluent face.
4. the heat exchanger according to any one in claims 1 to 3, is characterized in that,
Described core body is the plate-fin core body that many described first paths and many described alternate paths are alternately laminated,
The distributor fins of the flow direction changed in this first path is provided with at least each described first path.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-153240 | 2012-07-09 | ||
| JP2012153240A JP5795994B2 (en) | 2012-07-09 | 2012-07-09 | Heat exchanger |
| PCT/JP2013/003907 WO2014010180A1 (en) | 2012-07-09 | 2013-06-21 | Heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104428622A true CN104428622A (en) | 2015-03-18 |
Family
ID=49915665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380036190.6A Pending CN104428622A (en) | 2012-07-09 | 2013-06-21 | Heat exchanger |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20150136366A1 (en) |
| EP (1) | EP2889570B1 (en) |
| JP (1) | JP5795994B2 (en) |
| CN (1) | CN104428622A (en) |
| BR (1) | BR112015000249A2 (en) |
| EA (1) | EA030192B1 (en) |
| WO (1) | WO2014010180A1 (en) |
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| CN110131707A (en) * | 2019-05-14 | 2019-08-16 | 东北大学 | For preventing from occurring after high-temperature flue gas mixed flow bias current and that strengthens mixed flow turns smoke-box |
| CN113899231A (en) * | 2021-11-15 | 2022-01-07 | 陕西益信伟创智能科技有限公司 | Heat exchange core body with flow guide switching section, heat exchanger and machining method |
| CN114729786A (en) * | 2019-11-25 | 2022-07-08 | 大金工业株式会社 | Heat exchanger |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20150136366A1 (en) | 2015-05-21 |
| BR112015000249A2 (en) | 2017-06-27 |
| EP2889570A1 (en) | 2015-07-01 |
| EA030192B1 (en) | 2018-07-31 |
| EP2889570A4 (en) | 2016-06-08 |
| WO2014010180A1 (en) | 2014-01-16 |
| JP2014016083A (en) | 2014-01-30 |
| EA201590160A1 (en) | 2015-05-29 |
| JP5795994B2 (en) | 2015-10-14 |
| EP2889570B1 (en) | 2017-08-09 |
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