CN1080387A

CN1080387A - Stack type evaporator

Info

Publication number: CN1080387A
Application number: CN93104527A
Authority: CN
Inventors: 奥田伸之; 小岛正博
Original assignee: Showa Aluminum Corp
Current assignee: Resonac Holdings Corp
Priority date: 1992-04-03
Filing date: 1993-04-03
Publication date: 1994-01-05
Anticipated expiration: 2013-04-03
Also published as: CA2075686C; AU2747692A; CN1078340C; EP0563474B1; ATE133778T1; AU656429B2; DE69208076D1; ES2083693T3; CA2075686A1; EP0563474A1; DE69208076T2

Abstract

As the pipe fitting 1 that constitutes stack Type evaporator is many pipe fittings with draining with the outstanding rib 7 of shape that is in depression inwards of straight flute (7a) effect that extend to the lower channel jar 1b of portion from the upper slot jar 1a of portion with forming from the teeth outwards.And at pipe fitting 1 be clipped in that mulched ground forms specific hydrophilic resin thin layer on the surface of the fin 2 that is provided with between the pipe fitting.Combination by both can be brought into play the dew drainage by the utmost point effectively, therefore can positively prevent so-called " water flies " phenomenon, simultaneously can be owing to mould that the residual water of adhering to produced etc. is emitted foul smell, and can not emit foul smell as cover forming the prior art that waterglass is the hydrophilic resin thin layer, remain under the good state thereby can be often air be in harmonious proportion environment.

Description

Stack Type evaporator

The present invention relates to be applicable to the evaporimeter of vehicle air conditioner, especially with the sort of to dew disperse and foul smell to have taked to improve the stack Type evaporator of measure relevant.

This stack Type evaporator that generally uses is a kind of stack Type evaporator that is called one-sided groove pot type now, it has and makes two plate-like core dishes (60) as shown in Figure 11 tabular pipe fitting of multi-disc to landing coincidence and engaging at circumference (60a) mutually, and be in that fin to be clipped in the state lower edge thickness direction that these pipe fittings dispose each other stacked, the refrigerant inlet groove jar portion (60b) and the refrigerant outlet groove jar portion (60c) of pair of right and left are being set at an end of each these pipe fitting, in each pipe fitting, form cryogen circuit, promptly the refrigerant that flows into from inlet slot jar portion (60b) is after other end side flow, turn back with becoming the U font, flow to outlet slot jar portion (60c).

But in the stack Type evaporator of this one-sided groove pot type, because the cryogen circuit in as above said such U font ground formation pipe fitting, therefore just bias current easily when refrigerant U font turns back causes the in fact problem of heat transfer area minimizing with regard to having.

On the other hand, now just proposing and partly using the stack Type evaporator that refrigerant inlet groove jar portion is set, the what is called two groove pot types of refrigerant outlet groove jar portion are set at the other end at pipe fitting one end.

But, in no matter that a kind of stack Type evaporator among these one-sided groove pot types and the two groove pot types, in order to make the flow of refrigerant in the pipe fitting confuse and confuse effect according to this and improve heat transfer efficiency, all generally use following this structure as pipe fitting, promptly form two plate-like core dishes of a plurality of recess ribs (70) that tilt with the flow of refrigerant direction with the some configuration shape ground that becomes to loose on the inner surface, become above-mentioned rib (70) inboard opposed shape ground to overlap, and the structure that engages at circumference is (referring to Japanese Utility Model communique reality public clear 56-6847 number, real public clear 63-33100 number).

But, in the stack Type evaporator of this structure, owing to there are a plurality of recess ribs as described above, during use, the dew that generates on fin and pipe fitting surface just is trapped in the above-mentioned recess rib easily, and since with pipe fitting etc. and bigger with contact angle (in this part specification, only being called contact angle) attached to its lip-deep water droplet surface, so just can not carry out draining well.Therefore, remain in the dew in the circulation of air gap that the pipe fitting that contains fin forms each other in this wise, the problem that the environment that not only has these dews in use to be scraped the downside of wind by wind and the air in compartment is in harmonious proportion is damaged, but also because the delay of these residual dews that adhere to produces mould easily in the circulation of air gap, the foul smell that these moulds produced can produce the problem of unhappy sensation in the air by the circulation of air gap flows to the environment of the air mediation in the compartment in use.

In order to address these problems, for example special public clear 60-45776 number of Japanese patent gazette etc. is described like that, takes to cover on the surface of pipe fitting and fin to form the hydrophilic resin membrane of lipoprotein.Be that it is to form hydrophilic film by covering on the surface of pipe fitting etc., the dew that will adhere to forms flat as far as possible partially style, suppresses aeration resistance thus, improves tack, the mobility of dew simultaneously, makes the releasing of " water flies " phenomenon.

In the past, as above-mentioned special public clear 60-45776 communique is described, prefer the film of waterglass system as this hydrophilic film, but the film of this waterglass system can be from itself producing distinctive foul smell, therefore certainly will have this foul smell to flow in the compartment in use and the essential problem that the environment that air is in harmonious proportion is damaged.

On the other hand, in order to solve this foul smell problem, as special public clear 61-39589 number of Japanese patent gazette, spy open flat 3-49944 number described like that, propose hydrophilic resin membrane of lipoprotein with nylon system and replace above-mentioned waterglass and be.Under the situation with regard to known hydrophilic resin membrane of lipoprotein before use is this, the foul smell problem has been solved, but can not form desirable partial flat type sample as following dew that adheres to of film situation in waterglass system, thereby aeration resistance is increased relatively, and tack, the mobility that can not make dew to bring up to waterglass be such degree, so still have the problem that can not suppress " water flies " phenomenon effectively.

In addition, even it is as above said such, on the surface of evaporimeter, form above-mentioned hydrophilic film, the tack and the mobility of dew have been improved, owing on this surface, there are a plurality of above-mentioned recess ribs (70), dew is trapped in these recess ribs (70), drainage may not be fine, so some problems that not only still can not fully solve " water flies " phenomenon and cause by it, and the delay of this dew causes the mould generation easily, so and the foul smell that also has solid mould to produce flows to the problem that produces discomfort in the compartment.

So, in the former application of the applicant special 1-223685 of Yuanping City number (spy opens flat 3-87595 communique), the hydrophilic film body is not expected to some extent, thereby only proposed to make drainage improve the evaporimeter that elimination " water flies " phenomenon makes the foul smell problem solve again simultaneously by improving the shape of pipe fitting own.

That is: it is a kind of such structure, on the surface of pipe fitting, form many recess ribs that the straight flute performance is arranged that can use as most dew drainings, dew is induced to lower channel jar portion's side and makes it be discharged to the pipe fitting outside along these ribs from being parallel to each other of extending of the downward end slot jar portion of upper end slot jar portion of pipe fitting.So, in the evaporimeter of this structure, can flow out glibly smoothly by above-mentioned recess rib attached to the lip-deep dew of pipe fitting, in fact, it is the evaporimeter that good dehydration property is arranged on this meaning.

But, in this evaporimeter, normally the sheet that looses as the corrugated of fin is clipped in adjacent pipe fitting each other, move to above-mentioned pipe fitting side easily attached near locational dew those the lateral surfaces in the dew on this corrugated fin attached to the pipe joint side, be imported in the above-mentioned recess rib, and attached near the position medial surface of side in contrast, promptly attached near the locational dew medial surface of the trough portion side of corrugated fin, by its surface tension be adhere to easily residual.Therefore, can not say so attached to the dew on the corrugated fin and can be all easily and positively to move to the recess rib of pipe fitting, this just means the effect that may not necessarily reach complete draining.

The problem that like this, just can not solve " water flies " phenomenon fully and exhale an offensive odor because of the mould that residual water produced that adheres to.

Even have the dew draining also to can take into account the hydrophilic film that will on surfaces such as pipe fitting, form waterglass system or resin system naturally with the evaporimeter of the recess rib of straight flute effect for the sort of.

But, the hydrophilic film that is because of waterglass has problem aspect the foul smell, so it is difficult adopted, on the other hand, because in the known resin system film, good dew tack and mobility as waterglass system can not move to the recess rib of using straight flute as draining smoothly glibly because of dew, so can not bring into play its drainage effectively, thereby also will worry to take place " water flies " phenomenon in use.

The present invention makes in order to address these problems, and its objective is that providing a kind of has all taked the improvement measure and can be specially adapted to the stack Type evaporator that air regulator is used " water flies " and " foul smell " this two aspects problem.

In order to solve above-mentioned problem, the present inventor is after repeatedly having carried out meticulous experiment and research, in the previously presented stack Type evaporator of the applicant, the recess rib of many recess ribs straight flute effect that draining is used as dew that forms along the vertical direction on the pipe fitting surface, in order further to bring into play its effect effectively, to on the surface of this pipe fitting, form hydrophilic film by mulched ground, the hydrophilic film that is made of the resin of specific composition can be suitable for preferably, and the hydrophilic resin membrane of lipoprotein that the particular range contact angle is arranged is effectively, thereby finished the present application.

So, just on the surface of pipe fitting, between its top and bottom two groove jars portion from one side groove jar portion to having that the groove jar portion of another side extends as the recess rib of dew draining with the straight flute performance, along these ribs dew is induced to that side of lower channel jar portion, and it is discharged to the outside of pipe fitting, mulched ground forms and makes dew move to pipe fitting well from fin on the surface of fin and pipe fitting in addition, flat surfaces portion from this pipe fitting moves to the rib of above-mentioned recess well again, and also specific hydrophilic resin membrane of lipoprotein out of question aspect foul smell.

Promptly, above-mentioned problem is to be finished by such stack Type evaporator, it is overlapped the core dish of two plate-likes mutually to landing, and the peripheral part is engaged, constitute the inner tabular pipe fitting of multi-disc that refrigerant pathway is arranged, these pipe fittings in that fin to be clipped in the state lower edge thickness direction that these pipe fittings are provided with each other stacked, simultaneously in the groove jar portion that forms respectively in the upper end and the bottom of these pipe fittings these pipe fittings are bonded with each other and form the stacked shape evaporimeter of one, a pair of core dish that it is characterized in that constituting each above-mentioned pipe fitting has between two groove jar portions up and down separately, extend along the vertical direction to another side groove jar portion from one side groove jar portion, and many outstanding ribs of shape that are in depression inwards that are parallel to each other; Be provided between the rib of another side core dish by the rib that makes core dish on one side, and the leading section that makes many ribs joins on the planar portions of core dish vis-a-vis, thereby many unit refrigerant pathways that extend to another side groove jar portion from one side groove jar portion are set in above-mentioned each pipe fitting abreast, the straight flute that many dew drainings of extending to another side groove jar portion from one side groove jar portion are used is set on the outer surface of this pipe fitting simultaneously abreast;

And on the outer surface of above-mentioned pipe fitting and fin, mulched ground forms hydrophilic resin thin film layer, and this thin layer is to contain as the polyvinyl alcohol resin of main component and is the hydrophily additives that resin constitutes by polyamide-based resin and/or polyvinylpyrrolidone.

Perhaps, above-mentioned problem also can be finished by this stack Type evaporator, it is overlapped the core dish of two plate-likes mutually to landing, and circumference is engaged, constitute the inner tabular pipe fitting of multi-disc that refrigerant pathway is arranged, these pipe fittings in that fin to be clipped in the state lower edge thickness direction that these pipe fittings are provided with each other stacked, simultaneously in the groove jar portion that forms respectively in the upper end and the bottom of these pipe fittings these pipe fittings are bonded with each other and form the stack Type evaporator of one, a pair of core dish that it is characterized in that constituting each above-mentioned pipe fitting has between two groove jar portions up and down separately, extend along the vertical direction to another side groove jar portion from one side groove jar portion, and many outstanding ribs of shape that are in depression inwards that are parallel to each other; The rib of core dish is configured between the rib of another side core dish by making on one side, and the leading section that makes each bar rib joins on the planar section of core dish vis-a-vis, thereby many unit refrigerant pathways that extend to another side groove jar portion from groove jar portion on one side are set in above-mentioned each pipe fitting abreast, the straight flute that many dew drainings of extending to another side groove jar portion from groove jar portion are on one side used is set on the outer surface of this pipe fitting simultaneously abreast;

And on the outer surface of above-mentioned pipe fitting and fin, mulched ground forms the hydrophilic resin thin layer that contact angle θ is 5～20 degree.

Preferably in as the polyvinyl alcohol resin of main component, not only added the composition that contains the hydrophily additives as above-mentioned hydrophilic resin, contained film hardener, surfactant and make antiseptic, the bactericide that the mould of the source that foul smell takes place do not produce or prevent the composition of mould inhibitor such as mould microbial inoculum but also added.

And these above-mentioned components than suitable proportioning are: the polyvinyl alcohol resin as main component is 30～65 weight portions, be that the hydrophily additives that resin constitutes are that 20～65 weight portions, film hardener are that 1～15 weight portion, surfactant are that 0.1～2.0 weight portion, mould inhibitor are 3～30 weight portions by polyamide-based resin and/or polyvinylpyrrolidone.

Can be polyamide-based resin, polyvinylpyrrolidone any in the resin as above-mentioned hydrophily additives, but the most handy this mixed liquor of two kinds.

Phenolic aldehyde is that resin or urea are that resin etc. all is suitable for use as above-mentioned film hardener, but is resin with the few phenolic aldehyde of foul smell preferably.

The surfactant of nonionic system is suitable for use as above-mentioned surfactant.

Two (2-pyridine sulfo-) zinc 1,1 ¹-dioxide, tolimidazole carbamate, thiophene-benzimidazole etc. are suitable for use as above-mentioned mould inhibitor.

Contact angle θ about the hydrophilic resin thin layer, when its discontented 5 when spending, the tack of dew is just undue to be improved, from with the relation of straight flute, just not giving full play to its drainage with above-mentioned draining, on the contrary, when spending above 20, the tack of dew and mobility just descend, from still not giving full play to its drainage with above-mentioned draining with the relation of straight flute.Therefore, contact angle θ must be the scope of 5～20 degree, preferably the scope of 7～13 degree.

In order to obtain good purposes such as drainage, preferably the draining that is formed by the outstanding inwards rib of above-mentioned recess is set in the following scope with the ratio (%) of the shared area of the spacing P of furrow width W, the ditch depth D of straight flute, ditch and ditch with respect to that part of area except the outside bulge in core dish two ends.Promptly

It is more suitable that furrow width W is set in 1～3mm scope, preferably is set in 1.3～2.4mm scope.

It is suitable that ditch depth D is set in 1～2.5mm scope, preferably is set in 1.5～2.1mm scope.

It is suitable that the spacing P of ditch is set in 7～14mm scope, preferably is set in 8～11mm scope.

Draining is more suitable with the shared area of straight flute with respect to ratio (%) 5～40% scopes that are set in of that part of area except the outside bulge in the two ends of core dish, preferably is set in 15～25% scopes.

To what another side groove jar portion extended many be in depression shape inwards outstanding ribs of dew draining with the straight flute performance are arranged by on the outer surface between the two groove jar portions up and down of pipe fitting, being provided with abreast, can promptly be discharged to the outside to the rib of giving prominence to inwards along above-mentioned recess attached to the dew on pipe fitting and the fin from one side groove jar portion.Therefore can suppress so-called " water flies " phenomenon effectively.

And, form the hydrophilic resin thin layer by mulched ground on the outer surface of pipe fitting and fin, this thin layer contains as the polyvinyl alcohol resin of main component and is the hydrophily additives that resin constitutes by polyamide-based resin and/or polyvinylpyrrolidone, certainly be the problem of such foul smell with regard to there not being waterglass, and by based on the hydrophilic resin thin layer of above-mentioned specific composition with the composite effect that combination produced of the rib that draining gives prominence to inwards with the above-mentioned recess of straight flute performance arranged, so-called dehydration property is improved, drainage is further improved.Therefore can more effectively suppress so-called " flying water " phenomenon.

Fig. 1 is the expression embodiments of the invention, is the plane of the core dish seen from the refrigerant pathway side,

Fig. 2 is the amplification profile diagram that the 2-2 line along Fig. 1 obtains,

Fig. 3 is the amplification profile diagram that the 3-3 line along Fig. 1 obtains,

Fig. 4 (A) is the amplification profile diagram that the 4-4 line along Fig. 1 obtains; Fig. 4 (B) is the amplification profile diagram that the 5-5 line along Fig. 1 obtains,

Near the groove jar portion of Fig. 5 pipe fitting amplification profile diagram,

Fig. 6 is the part of stack Type evaporator represented oblique view under state,

Fig. 7 is the front view of evaporimeter integral body,

Fig. 8 is the key diagram of expression flow of refrigerant,

Fig. 9 is the core dish plane that constitutes groove jar portion dividing plate,

Figure 10 is the amplification profile diagram that the 10-10 line along Fig. 9 obtains,

Figure 11 be expression from the refrigerant pathway side see before the core dish plane of evaporimeter,

Figure 12 represents the curve map that draining (%) concerns with respect to the ratio of air side heat transfer area (the situation that does not have ditch as 100%) with respect to the ratio of that part of area that outwards expands except the two ends of core dish (6) and moisture-holding capacity with the shared area of straight flute,

Figure 13 is the curve map of expression and the corresponding cooling performance of refrigerant outlet lateral pressure,

Figure 14 is the curve map of expression and the corresponding refrigerant pathway resistance of refrigerant flow,

Figure 15 is the curve map of expression and the corresponding aeration resistance of air mass flow.

Below, explaining the present invention by embodiment, this embodiment is suitable for the stack Type evaporator used with the vehicle air conditioner that aluminium alloy is made.

In the overall diagram of evaporimeter shown in Figure 7, (1) is into plumbness and, the corrugated fin that (2) are arranged between adjacent pipe fitting (1), (1) and are arranged on outermost pipe fitting (1) outside and link into an integrated entity with soldering along the tabular pipe fitting of the stacked multi-disc of left and right directions.

Extremely shown in Figure 7 as Fig. 1, above-mentioned pipe fitting (1) has groove jar portion (1a), (1b) of outside expansion shape at the two ends of length direction, the refrigerant pathway (1c) of the offset flat shape that is communicated with two groove jar portions (1a), (1b) is arranged at the pars intermedia of length direction simultaneously.And each pipe fitting (1) is adjoining each other, and soldering connects under groove jar portion (1a), (1b) become to join state, is both by the cryogen flow through hole (1d) that is provided with in each groove jar portion (1a), (1b), the groove jar portion that (1d) makes adjacency and is in connected state.

Above-mentioned each pipe fitting (1) is that the core dish (6) of any two plate-likes is relatively overlapping along its periphery composition surface (6a), constitutes with soldering with being welded into one.This core dish (6) is formed by pressure processing, for core dish (6) being connected each other and the soldering of it and corrugated fin (2) is carried out easily, the material of the solder brazing thin slice of solder layer as it is all wrapped on the about two sides of core.

Above-mentioned core dish (6) all forms the bulge (9) of outside standing shape at both ends except the outboard wick dish (6) that constitutes outermost pipe fitting (1).As shown in Figure 6, the both ends of the outboard wick dish (6) of outermost pipe fitting (1) all form flat state, in its bottom broad ways three cryogen flow through holes (1d) are set with penetrating.

On the roof of above-mentioned each dilation (9), along the width of core dish (6) three cryogen flow through holes (1d) are set with penetrating, by these openings (1d), the groove jar portion of the pipe fitting that adjoins each other (1) is in connected state.; in evaporimeter overall diagram shown in Figure 7; constituting respectively from the beginning of evaporimeter the right the 5th and the 6th locational pipe fitting (1); (1) following side channel jar portion (1b); (1b) be bonded with each other face and the tenth and the 11 locational pipe fitting (1); (1) last side channel jar portion (1a); (1a) face that is bonded with each other; and constitute the 15 and the ten No. six locational pipe fitting (1); (1) following side channel jar portion (1b); (1b) be bonded with each other on each roof of above-mentioned bulge (9) of face; the cryogen flow through hole that penetrates is not set as shown in Figures 9 and 10, and these roofs are as the groove jar portion (1a) of the pipe fitting (1) of adjacency or (1b) mutual next door and working.

As shown in Figure 7, above-mentioned pipe fitting (1) is in corrugated fin (2) is clipped in their states each other, the state that becomes to join by above-mentioned solder brazing in connection with groove jar portion (1a), (1b), and the refrigerant outlet pipe (4) in the following side channel jar portion (1b) of the outermost pipe fitting of refrigerant inlet pipe (3) and the left side (1) in the following side channel jar portion (1b) of the outermost pipe fitting in the right (1) joins by above-mentioned cryogen flow through hole (1d) connection separately.

Because above-mentioned cause, as shown in Figure 8, the refrigerant that flows into from refrigerant inlet pipe (3) on each the pipe fitting group that separates by above-mentioned next door conversion direction the shape ground that crawls flowing, and outside evaporimeter, flow out from outlet (4).At this moment carry out heat exchange with the air that flows through the circulation of air gap, this circulation of air gap has comprised the fin (2) that forms between pipe fitting (1).(5) are arranged on the side plate in the outermost corrugated fin outside in Fig. 6 and Fig. 7.

In this embodiment, each above-mentioned pipe fitting group all is by constituting with the pipe fitting (1) of print number, and under the situation of this embodiment, uses pipe fitting (1) with the print number to constitute each pipe fitting group and is guaranteeing that aspect the good heat exchange performance be best scheme.But this situation is also arranged, promptly can not constitute each pipe fitting group with same pipe fitting (1) sheet number according to pipe fitting (1) the sheet number that constitutes evaporimeter integral body.In this case, when as the above embodiments, refrigerant gateway pipe (3), (4) being arranged on any one pipe fitting lower end one side, should set the pipe fitting sheet number of the pipe fitting group that constitutes the refrigerant inlet side morely.But the factors such as number of times that shape flows, refrigerant gateway pipe (3), (4) link position of preferably crawling according to sheet number, the refrigerant of pipe fitting (1), from the refrigerant inlet side to the refrigerant outlet side, when the pipe fitting sheet that increases formation pipe fitting group is counted, make the long-pending and refrigerant Volume Changes increase gradually accordingly of actual passage sections, in a word, make itself and each condition can obtain best result accordingly is provided with like that.

As Fig. 1, Fig. 3 and shown in Figure 6, on the inner surface of each above-mentioned core dish (6), width interval in accordance with regulations along dish forms the outstanding inwards rib (7) of recess highlightedly, it has the function of the straight flute that draining is used as dew, is that the state of being partial to core dish (6) one side circumference sides between above-mentioned two bulges (9), (9) is extended to the bulge (9) of another side as the crow flies by bulge (9) on one side.Then, by the core dish (6) that makes two to have this rib (7), (6) overlapping, circumference (6a) is all engaged, simultaneously shown in the solid line of Fig. 1 and Fig. 3 and chain-dotted line, make two label dishes (6), (6) rib on (7), (7) all become the state that alternately is provided with, and the leading section of each bar rib (7) all with the rib (7) of the core dish (6) that faces toward between the state that is arranged alternately that joins of planar section (8) under engage, in the refrigerant pathway (1c) of pipe fitting (1), form from multiunit refrigerant pathway (1e) of inlet slot jar portion (1b) to the straight extension of outlet slot jar portion (1a).

The straight flute of using for the draining that the inwardly outstanding rib (7) of above-mentioned recess is formed (7a) can obtain good purposes such as drainage performance, preferably the shared area of furrow width W, trench depth D shown in Figure 3, ditch spacing P and ditch is set for scope described below with respect to the ratio (%) of that part of area except the two ends bulge (9) of core dish (6), (9).

Be best furrow width W in the scope of 1～3mm.When discontented 1mm, dew is just difficult to be flowed into, and just can not bring into play the effect of draining with straight flute effectively, decide when surpassing 3mm on the contrary during broad, above-mentioned refrigerant unit path (1e) just becomes too narrow, thus it is bigger that the refrigerant lateral pressure is lost.Only scope is 1.3～2.4mm.

Trench depth D preferably is set in 1～2.5mm scope.When being discontented with 1mm, above-mentioned refrigerant unit path (1e) just too narrows down, and the pressure loss is increased, and can not bring into play the effect of draining with straight flute simultaneously effectively, and opposite equivalent diameter too increases when surpassing 2.5mm, and heat exchange performance is reduced.Only scope is 1.5～2.1mm.

Ditch spacing P preferably is set in 7～14mm scope.When being discontented with 7mm, above-mentioned refrigerant unit path (1e) just too narrows down, and the pressure loss is increased, and when surpassing 14mm, spacing increases with regard to undue on the contrary, and dew just can not successfully flow into.Only scope is 8～11mm.

In addition, preferably that ditch is shared area is set in 5～40% scopes with the ratio (%) of that part of area except the two ends bulge (9) of above-mentioned core dish (6), (9) relatively.No matter be discontented 5% or surpass 40%, all increase the effect that to bring into play draining usefulness straight flute effectively because of moisture-holding capacity.This relation can be from being seen too clearly with the shared ratio of straight flute (%) and the moisture-holding capacity Figure 12 curve with respect to the relation of the ratio of air side heat transfer area (being decided to be 100% when not having ditch) % by the above-mentioned draining of expression.When surpassing 40%, not only can not as above saidly bring into play the effect of draining effectively, and, the loss of refrigerant lateral pressure be increased because the sectional area of refrigerant pathway (1c) too narrows down with straight flute.Only scope is 15～25%.The meaning of the moisture-holding capacity in the above-mentioned curve map is meant after being immersed in the water fully as the condenser of exerciser and puts on, accompanying amount of moisture during through 30 minutes.

The cross sectional shape of the rib (7) that above-mentioned recess is given prominence to inwards need not be made rectangular cross section as shown in Figure 3, for example also can make shape that bottom one side width narrows down gradually or the like, but in order more effectively to bring into play the effect of draining with straight flute, the cross sectional shape of embodiment is preferably as shown in the figure.

Be arranged on the above-mentioned side plate (5) in outermost corrugated fin (2) outside, form many recessed (5a) of the shape side by side that extends along the vertical direction within it on the face side, make this side plate (5) be arranged on the outside of outermost corrugated fin (2), and form the above-below direction drainage channel that causes by above-mentioned recessed (5a) between this fin (2).Thus, in heat exchange, the dew that produces between outermost pipe fitting (1) and side plate (5) just flows down by above-mentioned drainage channel, has also just improved the drainage performance in this circulation of air gap.

As shown in Figure 5, on the surface of above-mentioned pipe fitting (1), corrugated fin (2) and side plate (5), be covered with hydrophilic resin thin layer (S).

The main component of polyvinyl alcohol resin, and must add into polyamide-based resin therein and/or polyvinylpyrrolidone is a resin as hydrophilic resin.Its first reason is because the hydrophilic film of previously used waterglass system can be from its body generation foul smell, this foul smell flows in the compartment just has the problem that produces unhappy sensation, replace waterglass system just such foul smell problem can not take place with above-mentioned resin, can guarantee good air mediation environment.Second reason is the resin with above-mentioned composition when constituting film, and the foul smell that constitutes the oxide of thin substrates rete just can not dispersed to the outside, can form the measure that better overcomes foul smell.The 3rd reason is from considering with the relation of straight flute with the dew draining, can more effectively bring into play its drainage, be under the hydrophilic film situation with waterglass promptly, because the adhesion property of dew is too good, with the relation of straight flute, just can not give full play to its drainage from it and draining, and with under the former known resin system film situation, because the tack and the mobility of dew are relatively poor, from it and draining relation with straight flute, still can not give full play to its drainage, the problem that produces so-called " water flies " phenomenon is all arranged in either case.Relative therewith and since the film that constitutes by the above-mentioned resin of forming have between waterglass system and before the characteristic of known resin system film centre, with the relation of straight flute, just can bring into play its function effectively from it and draining.

Above-mentioned hydrophilic resin membrane of lipoprotein is wished in the principal component polyvinyl alcohol resin to add and is advanced polyamide-based resin or polyvinylpyrrolidone is any in the resin, but in having added those hydrophilic resin membrane of lipoprotein of these two kinds of compositions, its initial stage hydrophily and hydrophilic continuation can be better.

As mentioned above, not only can add polyamide-based resin and/or polyvinylpyrrolidone in as the polyvinyl alcohol resin of principal component and be resin etc. hydrophily is attached and give agent, and preferably to add phenolic aldehyde be that resin or urea are surfactant and two (2-pyridine sulfo-)

zinc

1,1 of film hardener such as resin, nonionic system ¹Mould inhibitors such as-dioxide, tolimidazole carbamate, thiophene-benzimidazole.

Be the few phenolic aldehyde of foul smell that resin is used as above-mentioned film hardener preferably.

Preferably the amount of each above-mentioned component is fixed on respectively in such scope, promptly the polyvinyl alcohol resin as main component is that 30～65 weight portions, hydrophily imparting agent are that 20～65 weight portions, film hardener are that 1～15 weight portion, surfactant are that 0.1～2.0 weight portion, mould inhibitor are 3～30 weight portions.It the reasons are as follows described.

Polyvinyl alcohol resin as main component is the basis that constitutes the hydrophilic resin membrane of lipoprotein, when it is discontented with 30 weight portions, just can not obtain sufficient hydrophily, and film thickness attenuation, also just can not add following mould inhibitor, when surpassing 65 weight portions, economy is just poor, and hydrophily also descends simultaneously.Best scope is 40～60 weight %.

The hydrophily imparting agent is that raising main component polyvinyl alcohol resin is hydrophilic, when it is discontented with 20 weight portions, just can not give hydrophily fully, when containing sometimes too much above 65 weight portions, it just easily Film Fractionation is separated out, for example under the situation of having added mould inhibitor, because the film desorb is flowed out, just produce the problem that can not prevent that mould from taking place etc.Best scope is 35～45 weight portions.

Film hardener is added for resin film is adjusted to desired hardness, when it is discontented with 1 weight portion, film just can not reach abundant sclerosis, when surpassing 15 weight portions, even adding and all play sclerous reaction under the hydrophilic group situation, thereby just can not obtain sufficient hydrophily for obtaining hydrophily.Best scope is 5～10 weight portions.

Surfactant makes this resin liquid stabilisation, inhibition bubble and add when dip coating forms the hydrophilic resin thin layer, when being discontented with 0.1 weight portion, it not only can not suppress effectively to bubble, and when adding mould inhibitor, it is disperseed fully, when 2.0 weight portions, above-mentioned resin liquid is just bubbled, and takes place inhomogeneous on film.Best scope is 0.5～1.5 weight portion.

The purpose of adding mould inhibitor is to suppress to cause owing to the moisture that adheres to the mould etc. of generation, prevents foul smell, and this word of so-called mould inhibitor comprises meanings such as antiseptic, bactericide or mould inhibitor in this part specification.By above-mentioned surfactant this mould inhibitor is disperseed.

Mould inhibitor preferably is added in 3～30 weight portion scopes.Just can not obtain good biocidal property during discontented 3 weight portions,, disperse during use in the compartment, damage air mediation environment when surpassing 30 weight portions, will forming white powder when adding too much and separate out.Best scope is 5～15 weight portions.

The thickness of above-mentioned hydrophilic resin thin layer (S) is preferably made in 0.2～1.5 mu m range, when being discontented with 0.2 μ m, because of the undue thin effect that can not give full play to the hydrophilic resin membrane of lipoprotein, the distinctive stink of resin is increased.Best scope is 0.5～1.3 μ m.

The present application people invention, from above-mentioned draining relation with straight flute (7a), for the hydrophilic resin thin layer of the essential contact angle θ of use of the drainage of bringing into play it effectively in 5～20 degree scopes.

Also be, thought in the past that contact angle θ was preferably as far as possible little, but the present application people thinks like this, when contact angle θ discontented 5 spends, the tack of dew is too good, from just can not giving full play to its drainage with above-mentioned draining with the relation of straight flute (7a), and is surpassing 20 when spending, because the tack of dew and mobility descend, from still not giving full play to its drainage performance with above-mentioned draining with the relation of straight flute (7a).Therefore, the essential hydrophilic resin membrane of lipoprotein of contact angle θ in 5～20 degree scopes that use.The scope of optimum contact angle θ is 7～13 degree.

The covering of above-mentioned hydrophilic resin membrane of lipoprotein (S) forms and carries out as described below.

The stack Type evaporator that constitutes said structure is carried out after pre-treatment, pickling and washing handle according to usual method successively, carry out as the chromate gloss finish of the phosphoric acid chromic acid of bottom layer treatment or the chromate gloss finish of chromic acid, these processing are carried out for additional rotproofness and the cementability that improves resin.

Then, washing through the stack Type evaporator of above-mentioned processing after the processing, form the hydrophilic resin membrane of lipoprotein of above-mentioned composition, dry then with the dip coating method.

In order to confirm the validity of the present application, sample No.1～6 have been prepared for test, as shown in table 1, they are the structure the same with embodiment basically, but with the pattern (two groove jar types, one-sided groove jar type) of pipe fitting, the pattern of pipe fitting surface recess rib and hydrophilic film to have or not (kind) to make different.

Drainage and foul smell to above-mentioned various samples are estimated with following main points, and it the results are shown in table 2 li, and the moisture-holding capacity of air side per unit heat transfer area, and what go out at this tabular is with the percentage scaled value of test specimen No.1 as benchmark.

About the evaluation of drainage is to adopt method relatively, it be above-mentioned various test specimens floods in water after, comparison its moisture-holding capacity (corresponding) when mentioning with actual user mode through 30 minutes.It the results are shown in the table 2, it is quite few to be illustrated under the user mode moisture-holding capacity with zero, reach the degree that " water flies " phenomenon can not take place fully, represent moisture-holding capacity such degree when " water flies " phenomenon takes place less with △, there is the attached water of local remnants with * expression, the misgivings that generation " water flies " phenomenon is arranged, with * * the attend the meeting degree of generation " water flies " phenomenon of expression moisture-holding capacity more.

To the evaluation of foul smell be adopt with actual user mode the same terms under, the method by sense of smell is evaluated consequently is illustrated in the foul smell aspect with zero, much less when on-test, even also unchallenged through after a while; Be out of question when being illustrated in on-test with △, but debatable when long-time the use; With * be out of question when being illustrated in on-test, but use the short period just debatable; With * * expression is debatable at the very start from test.

Can be clear that from above-mentioned result, as the evaporimeter of the present application, possesses a plurality of drainings that have the along the vertical direction pipe fitting of straight flute, and cover the embodiment that is forming specific hydrophilic resin membrane of lipoprotein, even it is compared with any one comparative example, no matter be drainage or foul smell, all be good on any one, can think definitely that it can be determined the problem complete solution of so-called " water flies " and foul smell.In addition, also can clearly find out from the data of the moisture-holding capacity of represented air side per unit heat transfer area, under the situation of the particular hydrophilic resin film that uses the present application, even the distinctive hydrophilicity of this resin body be not good like that (contact angle 20 the degree below, the situation of embodiment is 7～13 degree), also can bring into play effectively and the composite effect of draining with straight flute, it seems from present situation and can think definitely that it has formed than so-called hydrophilicity is that best waterglass is the lower moisture-holding capacity of hydrophilic film (contact angle be 5 degree below), can prove really that it is that specific resin film and draining are organically combined with straight flute effect separately, brings into play their composite effect effectively.

In addition, represented in Figure 13～15 stack Type evaporator (for the sample No.1 of test) of the present application and now general representative so-called one-sided groove jar type stack Type evaporator (for the sample No.2 of test) about with the corresponding cooling capacity of refrigerant outlet lateral pressure, and the corresponding refrigerant pathway resistance of refrigerant flow and with the comparative result of the corresponding aeration resistance of air mass flow.

Can be clear that from above-mentioned result, the stack Type evaporator of the present application (invention sample) is compared with commercial now representational stack Type evaporator (commodity), aspect cooling capacity, under the situation of commodity, cooling capacity increases along with the refrigerant outlet lateral pressure and reduces significantly, in contrast to this, the present application be reduced rate less, no matter the refrigerant outlet lateral pressure how, the cooling performance aspect is to be improved.Aspect the refrigerant pathway resistance, the present application also is less relevant with refrigerant flow, usually is to reduce 0.1Kg/Cm ²More than the G degree.In addition, aspect aeration resistance, the present application is less relevant with air mass flow, usually is to reduce by 2 millimeters water level degree.Therefore can confirm that the present application all is better aspect performance of evaporator.

As mentioned above, the present invention is owing to the end at pipe fitting is provided with inlet slot jar portion, simultaneously be provided with outlet slot jar portion at the other end, and have many outstanding inwards ribs of shape that are in depression that extend along the vertical direction to another side groove jar portion from one side groove jar portion and be parallel to each other on a pair of core dish of pipe fitting constituting, in pipe fitting, be provided with many unit refrigerant pathways that extend to another side groove jar portion from one side groove jar portion abreast, therefore refrigerant can not produce bias current or confuse in pipe fitting, but circulates in refrigerant pathway smoothly smoothly.

Thereby refrigerant lateral pressure loss is few, and owing to undertaken evenly and the goodish heat exchange of efficient during by whole refrigerant pathway, the heat exchange performance of whole evaporimeter is improved.

In addition, because the rib alternate configurations of the core dish that faces toward mutually ground is provided with, the planar portions of the core dish that makes the leading section of each rib and face toward engages, therefore depart from along with the core dish and engage bad hidden danger with regard to removing when the leading section with rib is engaged with each other, can more at random carry out assembling operation, thereby two core dishes stack Type evaporator of certain pipe fitting that superior strength is arranged that engages each other can be provided.And, can positively guarantee to increase the heat transfer area of refrigerant, and then can improve heat exchanger effectiveness by making such structure.

Owing to extend along the vertical direction and the shape that is in depression of being parallel to each other many is extruded with the rib that the dew draining has the straight flute effect inwards to another side groove jar portion forming between the two groove jar portions up and down of outer surface of pipe fittings, make attached to the dew on pipe fitting and the fin and can promptly flow to the outside with straight flute along above-mentioned draining from one side groove jar portion.

And, by the combination of above-mentioned draining with the hydrophilic resin thin layer of straight flute and the specific composition that mulched ground forms on the outer surface of pipe fitting and fin, can obtain compound result of use, this compound action effect is the summation that surpasses respectively each effect that is caused with straight flute and hydrophilic resin thin layer by draining, can not estimates, to such an extent as to so the drainage dehydration property is further improved.

Thereby almost can suppress so-called " water flies " phenomenon fully, the mould that caused by the residual water of adhering to etc. can not taken place simultaneously yet, be in harmonious proportion the improper problem of environment and all solve so can damage air.

In addition, because the present invention is containing as the polyvinyl alcohol resin of main component and being that the attached resin of agent that gives of hydrophily that constitutes of resin is as above-mentioned resin by polyamide-based resin and/or polyvinylpyrrolidone, thereby be the problem that foul smell is taken place by himself occasion like that with regard to not having with waterglass also, can the environment that air is in harmonious proportion be maintained well.

As

claim

2,3 described, owing to being that to have added by polyamide-based resin and/or polyvinylpyrrolidone be that the hydrophily that constitutes of resin is attached, the present invention gives thin layer that agent, film hardener, surfactant and mould inhibitor form as the hydrophilic resin thin layer in the polyvinyl alcohol resin as main component, therefore can bring into play the drainage of draining effectively with straight flute, and can more effectively stop by the residual water of adhering to produce mould, thereby also just can prevent the generation of the unusual foul smell that causes thus effectively.

As claimed in claim 7 such, because the present invention is contact angle θ that 5～20 thin layers of spending are as the hydrophilic resin thin layer, therefore from above-mentioned draining relation with straight flute, its drainage of the performance that can double just, thereby can provide a kind of measure is all taked to improve in " water flies " and this two aspect of foul smell, be specially adapted to the stack Type evaporator that this air regulator is used.

Claims

1, a kind of stack Type evaporator, it is to be constituted the inner tabular pipe fitting of multi-disc that refrigerant pathway is arranged by the core dish of two plate-likes overlaps and makes its circumference engage mutually to landing, and fin is being clipped in stacked these pipe fittings of state lower edge thickness direction that these pipe fittings are provided with each other, simultaneously under the situation of the groove jar portion that forms respectively in the upper end and the bottom of these pipe fittings, make these pipe fittings all-in-one-piece stack Type evaporator that is bonded with each other, the a pair of core dish that it is characterized in that constituting above-mentioned each pipe fitting has between two groove jar portions up and down separately, extend along the vertical direction to another side groove jar portion from one side groove jar portion, and many outstanding ribs of shape that are in depression inwards that are parallel to each other, be provided between the rib of another side core dish by the rib that makes core dish on one side, and the leading section that makes each bar rib joins on the planar section of core dish vis-a-vis, many the unit refrigerant pathways that extend to another side groove jar portion from groove jar portion on one side are set in above-mentioned each pipe fitting abreast, the straight flute that many dew drainings of extending to the groove jar portion of another side from groove jar portion are on one side used is set on the outer surface of this pipe fitting simultaneously abreast;

And on the outer surface of above-mentioned pipe fitting and fin, mulched ground forms hydrophilic resin thin film layer, and it is to contain as the polyvinyl alcohol resin of main component that this film is led and to be that the hydrophily that constitutes of resin is attached by polyamide-based resin and/or polyvinylpyrrolidone give agent.

2, stack Type evaporator as claimed in claim 1 is characterized in that the hydrophilic resin thin layer is that having added by polyamide-based resin and/or polyvinylpyrrolidone is the attached thin layer that gives agent, film hardener, surfactant and mould inhibitor and constitute of hydrophily that resin constitutes in the polyvinyl alcohol resin as main component.

3, stack Type evaporator as claimed in claim 2 is characterized in that the hydrophilic resin thin layer contains the polyvinyl alcohol resin as main component: 30～65 weight portions,

Hydrophily is attached gives agent: 20～65 weight portions,

Film hardener: 1～15 weight portion,

Surfactant: 0.1～2.0 weight portion,

Mould inhibitor: 3～30 weight portions.

4, stack Type evaporator as claimed in claim 1, it is characterized in that straight flute that the dew draining is used be by

Furrow width W:1～3mm

Ditch depth D:1～2.5mm

The spacing P:7 of ditch～14mm

Regulation make.

5,, it is characterized in that straight flute area occupied that the dew draining uses is set in the 5-40% scope with respect to the ratio except the area core dish two ends bulge that part of as claim 1 or 4 described stack Type evaporators.

6, stack Type evaporator as claimed in claim 1, it is characterized in that except the pipe fitting trough jar portion on assigned position, in connection with pipe fitting trough jar portion connect by the cryogen flow through hole is set on its roof with penetrating with being interconnected, and the effect by the dividing plate that forms by the locational pipe fitting trough jar of afore mentioned rules portion roof, make the refrigerant that flows into from refrigerant inlet on each pipe fitting group of separating by aforementioned barriers conversion direction, be the shape ground that crawls and circulate, flow out from refrigerant outlet.

7, a kind of stack Type evaporator, it is overlapped the core dish of two plate-likes and is made its peripheral part to engage and the inner tabular pipe fitting of multi-disc that refrigerant pathway is arranged of formation mutually to landing, and fin is being clipped in stacked these pipe fittings of state lower edge thickness direction that these pipe fittings are provided with each other, make simultaneously these pipe fittings all-in-one-piece stack Type evaporator that is bonded with each other under the situation of the groove jar portion that forms respectively in the upper end and the bottom of these pipe fittings, the a pair of core dish that it is characterized in that constituting above-mentioned each pipe fitting has between two groove jar portions up and down separately, extend along the vertical direction to another side groove jar portion from one side groove jar portion, and many outstanding ribs of shape that are in depression inwards that are parallel to each other, be provided between the rib of another side core dish by the rib that makes core dish on one side, and the leading section that makes each bar rib joins on the planar section of core dish vis-a-vis, many the unit refrigerant pathways that extend to another side groove jar portion from groove jar portion on one side are set in above-mentioned each pipe fitting abreast, the straight flute that many dew drainings of extending to the groove jar portion of another side from groove jar portion are on one side used is set on the outer surface of this pipe fitting simultaneously abreast;

8, stack Type evaporator as claimed in claim 7, it is characterized in that straight flute that the dew draining is used be by

Furrow width W:1～3mm

Ditch depth D:1～2.5mm

The spacing P:7 of ditch～14mm

Regulation make.

9,, it is characterized in that straight flute area occupied that the dew draining uses is set in 5～40% scopes with respect to the ratio except the area core dish two ends bulge that part of as claim 7 or 8 described stack Type evaporators.

10, stack Type evaporator as claimed in claim 7, it is characterized in that except the pipe fitting trough jar portion on assigned position, in connection with pipe fitting trough jar portion connect by the refrigerant through hole is set on its roof with penetrating with being interconnected, and the effect of the dividing plate that the earthing is formed by the locational pipe fitting trough jar of afore mentioned rules portion roof, make the refrigerant that flows into from refrigerant inlet on each pipe fitting group of separating by aforementioned barriers conversion direction, be the shape ground circulation of crawling, from the refrigerant outlet outflow.