CN102914094A - Heat exchanger and air conditioner with same - Google Patents

Abstract

The invention provides a heat exchanger which comprises a gas-liquid separator. The gas-liquid separator comprises a bottom plate, a liquid stop plate and end plates; the bottom plate forms a gas-liquid separation cavity together with the top wall of the heat exchanger; the top wall of the heat exchanger is provided with a heat exchanger air outlet; the bottom plate comprises a cover plate and a guide plate which is connected below the cover plate; the cover plate is provided with a gas-liquid two-phase refrigerant outlet; the gas-liquid two-phase refrigerant outlet is arranged below a gas-liquid two-phase refrigerant inlet to communicate the gas-liquid separation cavity with a heat exchanger inner cavity arranged below the gas-liquid separation cavity; the liquid stop plate is in the shape of a groove, is fastened on the cover plate and arranged in the gas-liquid separation cavity and covers the gas-liquid two-phase refrigerant inlet; the downward side of the liquid stop plate is provided with a liquid stop plate outlet; and the end plates seal two ends of the gas-liquid separation cavity. Due to two times of interception, the liquid refrigerant is separated effectively, and the risk of liquid strike is reduced effectively. An evaporator has a simple internal structure, and the heat exchanger is convenient to manufacture and install.

Description

Heat exchanger and comprise its air-conditioner

Technical field

The present invention relates to refrigerating field, be specifically related to a kind of heat exchanger, relate in particular to a kind of heat exchanger with gas-liquid separator.

Background technology

For air-conditioning system, evaporimeter is one of four large parts, also be an indispensable part, directly be connected with compressor, if the design of evaporimeter is unreasonable, heat transfer effect is undesirable, cold-producing medium can not flash to gaseous state fully, and the situation that will exist liquid refrigerant to enter compressor forms liquid hit phenomenon, to the compressor injury, also can cause adverse influence to the normal operation of air-conditioning system simultaneously.Therefore how reasonably to design evaporation structure, when guaranteeing heat transfer effect, effectively avoid the liquid hit phenomenon of compressor, becoming design air-conditioning system common and important problem, also is a key issue that affects air-conditioning system reliability of operation and compressor service life.

Along with the development of field of Refrigeration and Air-conditioning, gas-liquid separator is built in a part that becomes evaporation structure in the evaporimeter, and reasonably structure of gas liquid separator can effectively solve the contradictory problems between heat transfer effect and the compressor hydraulic compression.Especially for flooded evaporator, the effect of gas-liquid separator is extremely important, if separative efficiency is not high, can cause two kinds of adverse consequences: one, for fear of hydraulic compression, reduce the liquid level in the evaporimeter, in waste part heat exchanger tube, also can reduce the operational efficiency of air-conditioning system; Two, in order to guarantee the operational efficiency of air-conditioning system, improve the liquid level of evaporimeter, heat exchanger tube is taken full advantage of, then may cause hydraulic compression, to the compressor injury.

Now in the technology, the measure of taking to process this problem in the structured design process of various evaporimeters probably can be divided into two classes, and one is not with built-in gas-liquid separator, but reaches this purpose by other measure, such as inner barrel increase superheater tube etc.; It two is built-in gas-liquid separator, but each producer is also different for the structural design of gas-liquid separator, most principle all is to adopt to stop that the principle of holding back removes the liquid refrigerant in the compressor air suction, gaseous refrigerant enters in the compressor and compresses after separating, in the liquid refrigerant Returning evaporimeter, wherein a part of gas-liquid separation is respond well, but complex structure, and the process of making and installing is very inconvenient; Although another part is simple in structure, inferior separating effect, liquid refrigerant still can enter into compressor, causes the operational efficiency of air-conditioning system low.

Summary of the invention

An object of the present invention is to provide a kind of heat exchanger, to solve the poor problem of existing gas-liquid separation effect.

For this reason, the invention provides a kind of heat exchanger, comprise the gas-liquid separator in the inner chamber that is arranged on heat exchanger, this gas-liquid separator comprises: base plate, described base plate is the plate body of concave cross section, roof with described heat exchanger forms the gas-liquid separation cavity, described roof is provided with the heat exchanger gas outlet, described base plate comprises cover plate and the deflector that is connected under the described cover plate, described cover plate is provided with the import of gas-liquid two-phase cold-producing medium, the setting of staggering of the import of described gas-liquid two-phase cold-producing medium and described heat exchanger gas outlet, described deflector is provided with the outlet of liquid refrigerant, the outlet of described liquid refrigerant is positioned under the import of described gas-liquid two-phase cold-producing medium, and the outlet of described liquid refrigerant is communicated with the described heat exchanger cavity of described gas-liquid separation cavity below being positioned at it;

Gas-liquid separator also comprises liquid barrier, described liquid barrier is flute profile, be buckled on the described cover plate and be arranged in described gas-liquid separation cavity, the downward side that the liquid barrier of described flute profile covers the import of described gas-liquid two-phase cold-producing medium, described liquid barrier is provided with the liquid barrier outlet;

Gas-liquid separator also comprises: end plate, the two ends of end plate closes gas-liquid separation cavity.

Further, heat exchanger is evaporimeter.

Further, the radial section of described liquid barrier is rectangle, comprise the first liquid barrier, the second liquid barrier and the 3rd liquid barrier that connect successively, described the first liquid barrier is positioned at the top of described the 3rd liquid barrier, and described liquid barrier outlet is positioned on described the 3rd liquid barrier.

Further, heat exchanger is cylindric, on the bilateral symmetry ground of described base plate a liquid barrier is set respectively, and the outlet of described liquid refrigerant is positioned at the lowest part of described deflector.

Further, the base plate of both sides is symmetrical arranged about intersecting lens; The liquid barrier of both sides is symmetrical arranged about intersecting lens.

Further, cover plate and deflector are connected to form circular arc.

Further, in the gas-liquid separation cavity, cover plate and deflector intersect the obtuse angle, and deflector itself also is bent into the obtuse angle.

The invention still further relates to the air-conditioning system or the air-conditioner that comprise above-mentioned heat exchanger.

The present invention covers the gas outlet of described heat exchanger by cover plate, the circuitous gas-liquid separator that enters into of the import of the gas-liquid two-phase cold-producing medium of gas-liquid two-phase cold-producing medium from cover plate, effectively reduce the flow velocity of gas-liquid two-phase cold-producing medium, hold back by collision and to isolate a part of liquid refrigerant, the liquid refrigerant that is separated flows back to along deflector and continues heat exchange in the heat exchanger, simultaneously after flow velocity reduces, operative liquid cold-producing medium in the cold-producing medium also can be separated under Action of Gravity Field, outlet by the bottom liquid refrigerant is back to and continues heat exchange in the heat exchanger, avoids being trapped in the gas-liquid separator.And, liquid barrier further reduces the flow velocity of cold-producing medium, hold back colliding through the liquid refrigerant that is not separated behind the base plate, after flow velocity reduces again simultaneously, can under Action of Gravity Field, be separated by some liquid refrigerant again in the cold-producing medium.The liquid refrigerant that is separated after for the second time gas-liquid separation of process liquid barrier flows back into sustainable participation heat exchange in the heat exchanger by the outlet of the liquid refrigerant of liquid barrier outlet and base plate bottom.The present invention has utilized the mode of barrier effect and the Gravity Separation liquid refrigerant of bent plate, stops through twice and holds back, and can effectively isolate liquid refrigerant, effectively reduce the risk of liquid hammer, and by rational structural design, make the internal structure of evaporimeter simple, making, easy for installation.

Description of drawings

The accompanying drawing that consists of the application's a part is used to provide a further understanding of the present invention, and the parts of identical function are with same numerical reference among the figure.Illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.

Fig. 1 shows the stereochemical structure according to the heat exchanger of the embodiment of the invention;

Fig. 2 is the local structure for amplifying at A-A place among Fig. 1;

Fig. 3 is the cross-section structure according to the heat exchanger of the embodiment of the invention;

Fig. 4 is the stereochemical structure according to the base plate of the embodiment of the invention;

Fig. 5 is the plan structure according to the base plate of the embodiment of the invention;

Fig. 6 is the side-looking structure according to the base plate of the embodiment of the invention;

Fig. 7 is the side-looking structure according to the liquid barrier of the embodiment of the invention;

Fig. 8 is the stereochemical structure according to the liquid barrier of the embodiment of the invention;

Fig. 9 is the main TV structure according to the liquid barrier of the embodiment of the invention.

The drawing reference numeral explanation:

1, heat exchangercylindrical shell 10, the roof 18 of heat exchanger, compressor air suction mouth (being the gas outlet of heat exchanger) 14, gas-liquid separation cavity 16, theinner chamber 160 of heat exchanger, heat exchanger tube 3,base plate 31,cover plate 32, intersectinglens 33,deflector 310, theimport 330 of gas-liquid two-phase cold-producing medium, theoutlet 5 of liquid refrigerant,liquid barrier 51, the firstliquid barrier 52, the secondliquid barrier 53, the 3rdliquid barrier 530, liquid barrier outlet 7, end plate 70, the top margin 71 of end plate, first side 73, the second side

The specific embodiment

Except as otherwise noted, used term has implication given below otherwise in the context of the present invention.Other terms that this paper does not specifically provide implication have its in the art common implication.

Fig. 1 to Fig. 3 shows the structure according to the heat exchanger of the embodiment of the invention, as shown in Figure 1 to Figure 3, heat exchanger comprises the gas-liquid separator in theinner chamber 16 that is arranged on heat exchanger, and gas-liquid separator comprises: base plate 3,liquid barrier 5 and end plate 7, end plate 7 is positioned at the two ends of gas-liquid separator.Base plate 3,liquid barrier 5 and end plate 7 can be steel plate, are welded on the top ofheat exchanger cavity 16.

As shown in Figure 4 and Figure 5, base plate 3 is the plate body of concave cross section (being the tabular of bending), among the figure, base plate 3 is bent downwardly or caves in, form gas-liquid separation cavity 14 with theroof 10 of end plate 7 and heat exchanger, gas-liquid separation cavity 14 is except theoutlet 330 of theimport 310 by the gas-liquid two-phase cold-producing medium and liquid refrigerant andheat exchanger cavity 16 are communicated with, and gas-liquid separation cavity 14 is the cavity of a sealing, carries out gas-liquid separation.The term here " roof " is not the part forward that strictly refers to heat exchanger wall, and usually, heat exchanger is the barrel of horizontal positioned, and roof is for the wall of the lower position occupied with respect to liquid refrigerant.Base plate 3 comprises:cover plate 31 and be connected todeflector 33 under thecover plate 31, and cover plate and deflector global sections together is spill, can be connected to form particularly circular arc or bending shape, preferably, base plate 3 is convenient to and being welded to connect ofliquid barrier 5 for bending shape.The length ofdeflector 33 can be identical with cover plate 31.Cover plate 31 is provided with theimport 310 of gas-liquid two-phase cold-producing medium, andimport 310 is better is chosen as small pore-like, to reduce the speed of gas-liquid two-phase cold-producing medium.After flow velocity reduced, the operative liquid cold-producing medium in the cold-producing medium also can be separated under Action of Gravity Field.In order to guarantee that the gas-liquid two-phase cold-producing medium enters the flow of gas-liquid separator,import 310 can be set to a plurality of.Cover plate 31 be arranged on heat exchangerinner chamber 16 top and cover the gas outlet 18 of (comprise and block) heat exchanger from the below, namelycover plate 31 is not provided with theimport 310 of gas-liquid two-phase cold-producing medium in the face of 18 places, gas outlet of heat exchanger, to play the effect of baffle plate.Deflector 33 also covers the gas outlet 18. of heat exchanger.Namely, the gas-liquid two-phase cold-producing medium can directly not enter through base plate 3 gas outlet 18. of heat exchanger from the front, but through just entering the gas outlet 18 of heat exchanger after the gas-liquid separation.Theimport 310 of gas-liquid two-phase cold-producing medium be arranged on thecover plate 31 and with the setting of staggering of the gas outlet of heat exchanger, for example, theimport 310 of gas-liquid two-phase cold-producing medium is arranged on the both sides ofcover plate 31.

Deflector 33 is provided with theoutlet 330 of liquid refrigerant, and theoutlet 330 of liquid refrigerant for example is the hole, has certain obturation effect to keep gas-liquid separation cavity 14 as far as possible.Theoutlet 330 of liquid refrigerant is positioned under theimport 310 of gas-liquid two-phase cold-producing medium, theoutlet 330 of liquid refrigerant is communicated with gas-liquid separation cavity 14 withheat exchanger cavity 16 under being positioned atcavity 14, so that liquid refrigerant flow back in theheat exchanger cavity 16, avoid being trapped in the gas-liquid separator.

Such as Fig. 2, Fig. 7 and shown in Figure 8,liquid barrier 5 is buckled on thecover plate 31 and is arranged in gas-liquid separation cavity 14, the upper side ofliquid barrier 5 to and cover theimport 310 of gas-liquid two-phase cold-producing medium, for example,liquid barrier 5 is welded on thecover plate 31, length is with cover plate 31.Liquid barrier 5 also is the effect of playing baffle plate, further reduce the flow velocity of cold-producing medium, hold back colliding through the liquid refrigerant that is not separated behind the base plate, after flow velocity reduces again simultaneously, can under Action of Gravity Field, be separated by some liquid refrigerant again in the cold-producing medium.As shown in Figure 8, the bottom of liquid barrier is provided with theliquid barrier outlet 530 under the import that is positioned at the gas-liquid two-phase cold-producing medium.Liquid barrier outlet 530 is indirect with the outlet 330(of liquid refrigerant) be communicated with.

End plate 7 is tabular or sheet, the two ends of end plate 7 sealing gas-liquid separation cavitys 14, the cross sectional shape of the shape of end plate 7 and gas-liquid separation cavity 14 matches, mainly be used to stopping cold-producing medium, force cold-producing medium to enter the gas-liquid separator from theimport 310 of base plate both sides, improve the separative efficiency of gas-liquid separator.

As shown in Figure 3, flow in the gap of gas-liquid two-phase cold-producing medium betweenheat exchanger tube 160 in theinner chamber 16 of heat exchanger, carry out heat exchange, base plate 3 forms gas-liquid separation cavity 14 with theroof 10 of heat exchanger, the main space that gas-liquid separation cavity 14 carries out gas-liquid separation for gas-liquid separator of the present invention, namely base plate 3 cavity of keeping apart a sealing in theinner chamber 16 of heat exchanger carries out separately gas-liquid separation, and this cavity is gas-liquid separation cavity 14.Theimport 310 of the gas-liquid two-phase cold-producing medium of gas-liquid two-phase cold-producing medium from cover plate enters into gas-liquid separation cavity 14, the setting owing to stagger in theimport 310 of gas-liquid two-phase cold-producing medium and the gas outlet of heat exchanger, so, the gas-liquid two-phase cold-producing medium is stopped bycover plate 31, the operative liquid cold-producing medium can be retained down, this part liquid refrigerant is that the outer wall along base plate flows back in the heat exchanger after through collision, do not enter in the gas-liquid separator, some liquid refrigerant is because the flow velocity reduction, inner at gas-liquid separator under Action of Gravity Field, flow down alongdeflector 33, theinner chamber 16 that returns again heat exchanger through theoutlet 330 of liquid refrigerant continues heat exchange, thereby realizes for the first time gas-liquid separation.Gas-liquid two-phase cold-producing medium after for the first time gas-liquid separation of process is stopping throughliquid barrier 5 again, operative liquid cold-producing medium wherein can be retained down, byliquid barrier outlet 530outlets 330 that enter liquid refrigerant, theinner chamber 16 that returns heat exchanger continues heat exchange, and this is for the second time gas-liquid separation.Because base plate 3 andliquid barrier 5 are bent plate, the barrier effect of liquid towards cold-producing medium is obvious, and through twice gas-liquid separation, liquid refrigerant just can major part be returned to theinner chamber 16 continuation heat exchange of heat exchanger, thereby has realized higher gas-liquid separation efficient.

Further, as shown in Figure 1, compressor air suction mouth 18(is the gas outlet of heat exchanger) be arranged on the roof of heat exchanger, compressor air suction mouth 18 is communicated with gas-liquid separation cavity 14.After the secondary gas-liquid separation, gaseous refrigerant can enter in the compressor by compressor air suction mouth 18 and compress.

Further, heat exchanger is evaporimeter.Evaporimeter of the present invention comprises above-mentioned gas-liquid separator, can the raising system high efficiency of operation, when guaranteeing the evaporimeter heat transfer effect, effectively avoid liquid refrigerant to enter evaporimeter.The present invention can simplify the internal structure of evaporimeter in addition, makes making and easy for installation.

Liquid barrier 5 can be circular arc, and as better selection, as shown in Figure 7 and Figure 8,liquid barrier 5 is grooved, is conducive to stopping of liquid towards cold-producing medium, has effectively changed the flow direction of gas-liquid two-phase cold-producing medium.

As further better selection, as shown in Figure 7 and Figure 8,liquid barrier 5 is flute profile, comprise: thefirst liquid barrier 51, thesecond liquid barrier 52 and the3rd liquid barrier 53 that connect successively, thefirst liquid barrier 51 is parallel with the3rd liquid barrier 53, thesecond liquid barrier 52 is connected to the same end of thefirst liquid barrier 51 and the3rd liquid barrier 53, and thefirst liquid barrier 51 is positioned at the top of the3rd liquid barrier 53, andliquid barrier outlet 530 is positioned on the 3rd liquid barrier 53.Gas-liquid two-phase cold-producing medium after for the first time gas-liquid separation of process is from the opening that thefirst liquid barrier 51, the secondliquid barrier 52 and the 3rdliquid barrier 53 form, enter in theliquid barrier 5 formed spaces, through stopping of thesecond liquid barrier 52, operative liquid cold-producing medium wherein can be retained down, and flows out by liquid barrier outlet 530.In the present embodiment, form the right angle between the firstliquid barrier 51 and thesecond liquid barrier 52, form the right angle between thesecond liquid barrier 52 and the3rd liquid barrier 53, thesecond liquid barrier 52 is parallel withcover plate 31, like this, and the flow direction of change gas-liquid two-phase cold-producing medium that can be strong, the purpose that realization is dammed, straight tackling and liquid refrigerant through the secondliquid barrier 52 flow out the 3rdliquid barrier 53 from side direction, and most of liquid refrigerant just is separated, and returns heat exchanger.As an alternative, theliquid barrier 5 among the present invention can also be arc section, is mellow and full transition between the firstliquid barrier 51, the secondliquid barrier 52 and the 3rdliquid barrier 53 namely, is not connected clearly line.

Further, as shown in Figures 1 to 3, heat exchanger is cylindric,, base plate 3 covers the inner chamber that roof forms gas-liquid separator, and rectangleliquid barrier 5 is buckled in the both sides of base plate symmetrically, be on the cover plate 3, twodeflectors 33 are connected between twocover plates 31, and form bending shape.As shown in Figure 4, thedeflector 33 of both sides forms intersectinglens 32, and theoutlet 330 of liquid refrigerant is positioned on the intersecting lens.The setting ofcover plate 31 andliquid barrier 5 by both sides can be carried out simultaneously gas-liquid separation in the inner chamber both sides of heat exchanger, thereby improve gas-liquid separation efficient, and both sides can share theoutlet 330 of liquid refrigerant, has made things convenient for making.As shown in Figure 9, at this moment, end plate 7 comprises: top margin 70, first side 71 and second side 73, the shape of top margin 70 androof 10 match, be used for being connected toroof 10, first side 71 matches with the shape ofcover plate 31, is used for being connected tocover plate 31, second side 73 matches with the shape ofdeflector 33, is used for being connected todeflector 33.

Certainly, form in the situation of gas-liquid separation cavity independently satisfying the roof of base plate with heat exchanger, base plate can be not limited to be divided into two of both sides, also can be not limited to all offer in the inner chamber both sides of heat exchanger theimport 310 of gas-liquid two-phase cold-producing medium on the base plate, for example, theimport 310 of gas-liquid two-phase cold-producing medium only is set in a side, can be not limited toliquid barrier 5 all is set in both sides, for example, only in aside liquid barrier 5 is set, like this, also can finishes the purpose of gas-liquid separation, structure is also simple, but efficient is lower thanimport 310 and theliquid barrier 5 that both sides all arrange the gas-liquid two-phase cold-producing medium.

Further, as shown in Figure 6, the cover plate of bothsides 31 is symmetrical arranged about intersecting lens; Theliquid barrier 33 of both sides is symmetrical arranged about intersecting lens.Like this, be convenient to make, the effect of being convenient to the both sides gas-liquid separation is even.

Further, as shown in Figure 6, in the gas-liquid separation cavity,cover plate 31 and deflector 33 A that corners, angle A is the obtuse angle,deflector 33 also bends angulation B, B obtuse angle, angle.Can effectively reduce like this whole height of gas-liquid separator, can suitably increase the volume of the gas-liquid two-phase cold-producing medium that holds in theinner chamber 16 of heat exchanger, the bad problem of gas-liquid separation effect that closely occurs apart from the gas-liquid two-phase cold-producingmedium 160 in theinner chamber 16 of heat exchanger owing to theoutlet 330 of liquid refrigerant can not occur.

Said structure of the present invention and feature are in the situation that not conflicting can the combination mutually, the explanation of the specific embodiment of front can disclose general features of the present invention fully, so that other people are easily concrete application by existing knowledge these specific embodiment are adjusted and/or adaptations, these all do not depart from scope of the present invention, so these adjustment and revise the replacement that is equal to be considered as embodiment disclosed in the present invention.

Claims (7)

1. a heat exchanger comprises the gas-liquid separator in the inner chamber that is arranged on described heat exchanger, it is characterized in that, described gas-liquid separator comprises:

Base plate, described base plate is the plate body of concave cross section, roof with described heat exchanger forms the gas-liquid separation cavity, described roof is provided with the heat exchanger gas outlet, described base plate comprises cover plate and the deflector that is connected under the described cover plate, described cover plate is provided with the import of gas-liquid two-phase cold-producing medium, the setting of staggering of the import of described gas-liquid two-phase cold-producing medium and described heat exchanger gas outlet, described deflector is provided with the outlet of liquid refrigerant, the outlet of described liquid refrigerant is positioned under the import of described gas-liquid two-phase cold-producing medium, and the outlet of described liquid refrigerant is communicated with the described heat exchanger cavity of described gas-liquid separation cavity below being positioned at it;

Liquid barrier, described liquid barrier is flute profile, is buckled on the described cover plate and is arranged in described gas-liquid separation cavity, the downward side that the liquid barrier of described flute profile covers the import of described gas-liquid two-phase cold-producing medium, described liquid barrier is provided with the liquid barrier outlet; And

End plate, the two ends of the described gas-liquid separation cavity of described end plate closes.

2. heat exchanger according to claim 1, it is characterized in that: described heat exchanger is evaporimeter.

3. heat exchanger according to claim 1, it is characterized in that: the radial section of described liquid barrier is rectangle, comprise the first liquid barrier, the second liquid barrier and the 3rd liquid barrier that connect successively, described the first liquid barrier is positioned at the top of described the 3rd liquid barrier, and described liquid barrier outlet is positioned on described the 3rd liquid barrier.

4. heat exchanger according to claim 2, it is characterized in that: described heat exchanger is cylindric, on the bilateral symmetry ground of described base plate a liquid barrier is set respectively, the outlet of described liquid refrigerant is positioned at the lowest part of described deflector.

5. heat exchanger according to claim 1, it is characterized in that: described cover plate and deflector are connected to form circular arc.

6. heat exchanger according to claim 1, it is characterized in that: in described gas-liquid separation cavity, described cover plate and deflector intersect the obtuse angle, and deflector itself also is bent into into the obtuse angle.

7. an air-conditioner is characterized in that, comprises such as each described heat exchanger of claim 1 to 6.

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