CN210688818U - Heat exchanger and air conditioner with same - Google Patents
Heat exchanger and air conditioner with same Download PDFInfo
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- CN210688818U CN210688818U CN201921852142.5U CN201921852142U CN210688818U CN 210688818 U CN210688818 U CN 210688818U CN 201921852142 U CN201921852142 U CN 201921852142U CN 210688818 U CN210688818 U CN 210688818U
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Abstract
The utility model discloses a heat exchanger and air conditioner that has it, the heat exchanger includes at least one heat transfer unit, heat transfer unit includes: the fin, pressure manifold and capillary, the thickness one side of fin has location structure, the pressure manifold is two and is located respectively the length both sides of fin, the capillary passes through location structure location cooperation in the thickness one side of fin, just the length both ends of capillary communicate with two pressure manifolds respectively. According to the utility model discloses a heat exchanger, the comdenstion water of the heat transfer unit of heat exchanger discharges smoothly, air flow resistance is little, the heat transfer efficiency is high, and the fin is big with the area of contact of capillary, and fin heat exchange efficiency is high, makes capillary and fin location fit through location structure moreover to reduce the assembly degree of difficulty of capillary, improved the assembly efficiency of capillary, improved the heat transfer reliability and the heat transfer homogeneity of capillary and fin to a certain extent.
Description
Technical Field
The utility model belongs to the technical field of the air conditioning technique and specifically relates to a heat exchanger and air conditioner that has it is related to.
Background
The tube fin type heat exchanger in the related art adopts the transverse refrigerant tube with a large tube diameter and the vertically arranged fins, so that condensate water is not smoothly discharged, and air flow resistance is large. In addition, the refrigerant pipe and the fins are combined in a pipe expanding mode, the processing is complex, the contact area between the fins and the refrigerant pipe is small, and the fin heat exchange efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a heat exchanger, heat transfer unit's of heat exchanger comdenstion water discharges smoothly, air flow resistance is little, the heat transfer efficiency is high, and the fin is big with the heat transfer area of capillary, and fin heat exchange efficiency is high, makes capillary and fin location fit through location structure moreover to reduce the assembly degree of difficulty of capillary, improved the assembly efficiency of capillary, improved the heat transfer reliability and the heat transfer homogeneity of capillary and fin to a certain extent.
The utility model also provides an air conditioner of having above-mentioned heat exchanger.
According to the utility model discloses heat exchanger of first aspect embodiment, the heat exchanger includes at least one heat transfer unit, heat transfer unit includes: the fin, the thickness one side of the said fin has positioning structure; the two collecting pipes are respectively positioned at two sides of the length of the fin; and the capillary tube is positioned and matched on one side of the thickness of the fin through the positioning structure, and the two ends of the length of the capillary tube are respectively communicated with the two collecting pipes.
According to the utility model discloses a heat exchanger, the comdenstion water of the heat transfer unit of heat exchanger discharges smoothly, air flow resistance is little, the heat transfer efficiency is high, and the fin is big with the area of contact of capillary, and fin heat exchange efficiency is high, makes capillary and fin location fit through location structure moreover to reduce the assembly degree of difficulty of capillary, improved the assembly efficiency of capillary, improved the heat transfer reliability and the heat transfer homogeneity of capillary and fin to a certain extent.
In some embodiments, the capillary tube is positionally fixed to the fin by a plurality of the positioning structures disposed at intervals along the length of the capillary tube.
In some embodiments, the fin is provided with a plurality of capillaries distributed at intervals along the width direction of the fin, and each capillary is positioned and matched with the fin through at least one positioning structure.
In some embodiments, the locating structure defines a locating groove in which a length of the capillary tube fits in a locating position.
In some embodiments, the positioning groove comprises an inlet groove section and a positioning groove section, the inlet groove section is positioned on one side of the positioning groove section far away from the fin, and the groove width of the inlet groove section is gradually increased along the direction far away from the positioning groove section.
In some embodiments, the positioning groove section has a groove width that gradually increases in a direction away from the inlet groove section.
In some embodiments, the positioning structure comprises two plates defining the positioning slot therebetween.
In some embodiments, the sheet is punched from the fins.
In some embodiments, the capillary tube is welded to the fin.
In some embodiments, the heat exchange unit comprises a plurality of fins, the fins are arranged in sequence along the thickness direction of the fins, and the positioning structure is clamped between two adjacent fins to limit the distance between the two adjacent fins.
In some embodiments, the two headers extend in a horizontal direction, the heat exchange unit includes a plurality of fins, the fins are arranged at intervals along a length direction of the header, each fin extends in a vertical direction, a plurality of capillary tubes are arranged on one side of the thickness of each fin, the capillary tubes are arranged at intervals along a width direction of the fin, and each capillary tube extends in the vertical direction.
According to the utility model discloses air conditioner of second aspect embodiment, include according to the utility model discloses the heat exchanger of first aspect embodiment.
According to the utility model discloses an air conditioner is through setting up the heat exchanger of above-mentioned first aspect to the whole heat transfer performance of air conditioner has been improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic view of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic view of a heat exchange unit according to an embodiment of the present invention, in which one fin is hidden between every two adjacent fins;
FIG. 3 is a schematic view of a fin in positional engagement with a capillary tube via a locating structure according to an embodiment of the present invention;
FIG. 4 is an enlarged view of portion A circled in FIG. 3;
FIG. 5 is a schematic view of fins defining a spacing from the fins by a locating structure according to one embodiment of the present invention;
fig. 6 is an experimental comparison curve of heat exchange amount of a heat exchanger according to an embodiment of the present invention with a tube fin heat exchanger and a micro-channel heat exchanger;
fig. 7 is an experimental comparison curve of air side heat transfer coefficients of a heat exchanger according to an embodiment of the present invention with a tube and fin heat exchanger, a microchannel heat exchanger;
fig. 8 is an experimental comparison curve of air side pressure drop of a heat exchanger according to an embodiment of the present invention with a tube and fin heat exchanger and a microchannel heat exchanger.
Reference numerals:
an air conditioner 1000;
a heat exchanger 100; a side plate 200; a middle partition plate 300; a side plate 400;
a heat exchange unit 1; a header 11; a fin 12; a capillary 13;
a positioning structure 14; a plate 141; a positioning groove 140; an inlet slot segment 1401; a positioning groove section 1402;
a connection unit 2; a connecting pipe 21; a baffle 22.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials.
Next, a heat exchanger 100 according to an embodiment of the first aspect of the present invention is described with reference to the drawings.
As shown in fig. 1, the heat exchanger 100 may include at least one heat exchange unit 1, and in conjunction with fig. 2, the heat exchange unit 1 may include: fin 12, pressure manifold 11 and capillary 13, fin 12's thickness one side has location structure 14, and pressure manifold 11 is two and is located the length both sides of fin 12 respectively, and capillary 13 passes through location structure 14 positioning fit in the thickness one side of fin 12, and the length both ends of capillary 13 communicate with two pressure manifolds 11 respectively.
From this, through set up location structure 14 on fin 12, make capillary 13 can with fin 12 location coordination, thereby can improve the assembly efficiency of capillary 13 and fin 12, for example, when capillary 13 need link to each other with fin 12 welding, before the welding, can be earlier with capillary 13 and location structure 14 location coordination, thereby it is spacing just need not to hand capillary 13 again, thereby greatly reduced the operation degree of difficulty, the assembly efficiency is improved, still improved because capillary 13 is hand to fix a position inaccurate, and the uneven scheduling problem of heat transfer that arouses.
In addition, because the collecting pipes 11 are respectively located at two sides of the length of the fin 12, and two ends of the length of the capillary tube 13 are respectively communicated with the two collecting pipes 11, it is described that the capillary tube 13 extends along the extending direction of the fin 12, or the length direction of the capillary tube 13 is the same as or approximately the same as the length direction of the fin 12, therefore, firstly, the heat exchange area between the capillary tube 13 and the fin 12 can be increased, so that the heat exchange efficiency between the capillary tube 13 and the fin 12 is high, and thus the heat exchange speed between the fin 12 and the air can be increased, secondly, the relative position relation between the fin 12 and the capillary tube 13 is not arranged vertically like the fin and a refrigerant pipe in a tube-fin heat exchanger, so that the smooth.
The capillary 13 is a small tube having a small diameter, and may have a diameter of about 0.5mm, for example. Because the diameter of the capillary tube 13 is smaller, compared with a tube-fin heat exchanger, the problem of refrigerant leakage is smaller, the safety of the heat exchanger 100 and even the air conditioner 1000 to which the heat exchanger is applied is more guaranteed, and the reliability is more guaranteed.
In some embodiments of the present invention, as shown in fig. 3, the capillary tube 13 is position-fitted to the fin 12 by a plurality of positioning structures 14 disposed at intervals along the length of the capillary tube 13. This improves the reliability and stability of the positioning of the capillary 13 and the fin 12 relative to each other. In addition, in some embodiments, the plurality of positioning structures 14 for positioning one capillary tube 13 may be uniformly spaced apart, that is, the distance between every two adjacent positioning structures 14 in the plurality of positioning structures 14 for positioning one capillary tube 13 is equal, so that the uniformity of heat exchange and the convenience of manufacture may be improved.
In some embodiments of the present invention, as shown in fig. 3, the fin 12 is provided with a plurality of capillaries 13 spaced apart from each other along the width direction of the fin 12, and each capillary 13 is in positioning fit with the fin 12 through at least one positioning structure 14. That is, the thickness side of the fin 12 is provided with a plurality of capillaries 13 distributed at intervals along the width direction of the fin 12, and each capillary 13 is provided with at least one positioning structure 14 for positioning and matching. This can further increase the heat exchange area between the capillary tube 13 and the fin 12, thereby improving the heat exchange efficiency of the entire heat exchange unit 1. In addition, in some embodiments, the plurality of capillaries 13 distributed on the same side of the fin 12 may be uniformly spaced apart, that is, the adjacent two capillaries 13 are equally spaced, so that the uniformity of heat exchange and the convenience of manufacture may be improved.
It is to be noted that different embodiments or examples and features of different embodiments or examples described in this specification may be combined and combined by one skilled in the art without contradiction.
For example, in one embodiment of the present invention, as shown in fig. 3, the fin 12 may have a plurality of rows of positioning sets spaced apart and distributed along the width direction of the fin 12, each row of positioning sets including a plurality of positioning structures 14 spaced apart and distributed along the length direction of the fin 12, so that the thickness side of the fin 12 may be provided with a plurality of capillaries 13 spaced apart and distributed along the width direction of the fin 12, and each capillary 13 is positioned and matched with the fin 12 by the plurality of positioning structures 14 spaced apart and distributed along the length direction of the fin 12. This can improve the heat exchange efficiency between the fins 12 and the environment.
In addition, it should be noted that a plurality described herein refers to two and more than two, for example, two, three, four, etc. In a specific example of the present invention, as shown in fig. 3, the fin 12 may have four rows of positioning sets spaced apart from each other in the width direction of the fin 12, each row of positioning sets includes three positioning structures 14 spaced apart from each other in the length direction of the fin 12, so that the thickness side of the fin 12 may be provided with four capillaries 13 spaced apart from each other in the width direction of the fin 12, and each capillary 13 is position-fitted to the fin 12 through the three positioning structures 14 spaced apart from each other in the length direction of the fin 12. Therefore, the heat exchange effect is good, the structure is simple, and the processing and the manufacturing are simple.
In some embodiments of the present invention, as shown in fig. 4, the positioning structure 14 may define a positioning groove 140, and a section of the capillary 13 in the length direction fits within the positioning groove 140. Therefore, the capillary tube 13 and the positioning structure 14 are assembled quickly and conveniently. For example, in some embodiments, as shown in fig. 4, the positioning structure 14 may include two plates 141, and the positioning groove 140 is defined between the two plates 141, so that the positioning structure 14 has a simple structure, is convenient to manufacture, and can simply and conveniently define the positioning groove 140.
In addition, in some specific examples of the present invention, the plate 141 may be formed by punching the fin 12, that is, a part of the fin 12 is a punched portion, a contour edge of the punched portion includes a first edge section and a second edge section, when punching, the second edge section is punched, and the punched portion is folded along the first edge section, so that the punched portion can be folded to the thickness side of the fin 12, at this time, the punched portion may be regarded as a plate 141, that is, it is described that the plate 141 is formed by punching the fin 12, and thus, the processing is convenient and the material is saved.
Further, in the specific example shown in fig. 4, when both sheets 141 defining the positioning groove 140 are punched with the fins 12, a part of the second edge sections of the two punching portions for constituting the two sheets 141 may be overlapped, so that after the punching operation, the two punching holes may be combined into one large hole, i.e., there is no transverse rib caught between the two punching holes, whereby the difficulty of processing may be reduced.
Of course, the present invention is not limited thereto, and the plate 141 may be welded to the fin 12; alternatively, in other embodiments, the positioning groove 140 may be defined by other manners, for example, a positioning seat (not shown) or the like formed with the positioning groove 140 may be welded to the fin 12 instead of the two plates 141; furthermore, the positioning structure 14 may be configured as other more complex structures, for example, the positioning structure 14 may include a rotating band (not shown), one end of the rotating band is hinged to the fin 12, and the other end of the rotating band is free, and after the capillary tube 13 is disposed on the thickness side of the fin 12, the other end of the rotating band may be pulled and locked on the fin 12, so that the rotating band and the fin 12 jointly encircle the capillary tube 13 to position the capillary tube 13.
In some embodiments of the present invention, as shown in fig. 4, the positioning groove 140 may include an inlet groove section 1401 and a positioning groove section 1402, the inlet groove section 1401 is located on one side of the positioning groove section 1402 away from the fin 12, and the groove width of the inlet groove section 1401 may gradually increase along a direction away from the positioning groove section 1402. Thus, the inlet slot section 1401 is illustrated as being flared so as to facilitate the insertion and positioning of the capillary tube 13 into the positioning slot 140, and to improve the rapidity of the positioning operation.
In addition, in some embodiments, as shown in fig. 4, when the groove width of the inlet groove segment 1401 gradually increases in a direction away from the positioning groove segment 1402, the groove width of the positioning groove segment 1402 gradually increases in a direction away from the inlet groove segment 1401, so as to illustrate that the groove width of the positioning groove 140 as a whole may decrease and then increase in a direction away from the fin 12, or, when the positioning groove 140 is defined between two sheets 141, the two sheets 141 may be distributed in an X shape (for example, when the sheets 141 are punched from the fin 12, the punched parts may be folded along the first edge segment and then bent into an X shape).
Therefore, after the capillary tube 13 extends into the positioning groove section 1402, the positioning groove section 1402 is in a shape flaring towards the fin 12, so that the capillary tube 13 can be closer to the fin 12, the effect that the capillary tube 13 clings to the fin 12 is achieved, the heat exchange effect is improved, furthermore, a necking part (namely, the groove width is small) can be formed at the joint of the inlet groove section 1401 and the positioning groove section 1402, and the capillary tube 13 can be prevented from being separated from the positioning groove section 1402 to the inlet groove section 1401. Of course, the present invention is not limited thereto, and in other embodiments of the present invention, the positioning groove section 1402 can also be an equal-width groove section, etc., which is not described herein again. Furthermore, the positioning groove segment 1402 may also be shaped to match the outer shape of the capillary 13, as the processing conditions allow, so that the contact thermal resistance between the capillary 13 and the positioning structure 14 may be reduced to some extent.
In some embodiments of the present invention, the capillary 13 can also be welded and fixed on the fin 12, that is, after the positioning structure 14 is used to position the capillary 13 on the fin 12, the capillary 13 and the fin 12 can also be fixed together by using the welding method, so as to ensure the connection reliability between the capillary 13 and the fin 12 and increase the heat exchange efficiency between the capillary 13 and the fin 12. Of course, the present invention is not limited thereto, and in other embodiments of the present invention, when the positioning reliability of the positioning structure 14 satisfies the connection requirement, the welding step can be omitted. However, it is understood that providing a soldering step improves the reliability of the connection of the capillary 13 to the fin 12.
The utility model discloses an in some embodiments, when fin 12 links to each other with capillary 13 welding, capillary 13 also can weld with pressure manifold 11 and link to each other to heat transfer unit 1 is whole can be for the integrative piece of not removable, thereby can improve the holistic reliability of heat exchanger 100 and heat transfer performance, has reduced heat transfer unit 1's the processing degree of difficulty moreover, makes and makes simplyr, high-efficient.
In some embodiments of the present invention, as shown in fig. 5, the heat exchanging unit 1 may include a plurality of fins 12, the plurality of fins 12 are sequentially arranged along the thickness direction of the fins 12, and the positioning structure 14 is clamped between two adjacent fins 12, that is, one end of the positioning structure 14, which is far away from the fin 12 where the positioning structure is located, is abutted against the next fin 12 adjacent to the fin 12, so as to limit the distance between two adjacent fins 12.
Therefore, the capillary tube 13 can be positioned by the positioning structure 14, and the distance between the adjacent fins 12 can be limited by the positioning structure 14, so that the air flow passing efficiency is ensured, the heat exchange effect is improved, and the fin 12 falling problem is solved. In addition, in some embodiments, the height of the positioning structure 14 (i.e., the height along the thickness direction of the fins 12) may be set to be between 1.1mm and 1.5mm, so as to ensure not only the positioning effect of the positioning structure 14 on the capillary 13, but also the distance between two adjacent fins 12 to meet the ventilation and heat exchange requirements.
In some embodiments of the present invention, as shown in fig. 1, the heat exchanger 100 may include a plurality of heat exchange units 1, so as to further improve the overall heat exchange performance of the heat exchanger 100. For example, in the utility model discloses a in a specific example, heat exchanger 100 can include two heat exchange unit 1 and the linkage unit 2 of connection between two heat exchange unit 1, wherein, every heat exchange unit 1 all can include two along upper and lower direction interval and parallel arrangement's pressure manifold 11 and perpendicular to pressure manifold 11 direction fin 12 and capillary 13 that set up, two heat exchange unit 1's pressure manifold 11 mutually perpendicular sets up, so that heat exchanger 100 that is L shape roughly when orthographic projection is done to heat exchanger 100 top-down, linkage unit 2 can include two connecting pipes 21 and baffle 22, two connecting pipes 21 correspond two pressure manifolds 11 of connecting two heat exchange unit 1 respectively, baffle 22 is connected between two connecting pipes 21, thereby can avoid the big air current to flow away from between two connecting pipes 21, reduce heat exchange efficiency's problem. Of course, the utility model is not limited to this the utility model discloses an in other embodiments, can also be through the quantity of adjusting the structure of linkage unit 2 and heat transfer unit 1, can be so that heat exchanger 100 of the U-shaped roughly when heat exchanger 100 top-down does the orthographic projection etc to increase heat transfer area of heat exchanger 100, and then improve heat exchange efficiency of heat exchanger 100, in order to adapt to the efficiency and upgrade.
Next, an air conditioner 1000 according to an embodiment of the second aspect of the present invention is described.
As shown in fig. 1, an air conditioner 1000 according to an embodiment of the present invention may include a heat exchanger 100 according to an embodiment of the present invention. According to the utility model discloses air conditioner 1000 because heat exchange efficiency of heat exchanger 100 can obtain improving to can improve air conditioner 1000's whole efficiency.
Specifically, the type of the air conditioner 1000 according to the embodiment of the present invention is not limited, that is, the type of the air conditioner 1000 to which the heat exchanger 100 according to the embodiment of the present invention is applied is not limited, and the heat exchanger 100 may be applied to an indoor unit of the air conditioner 1000 or an outdoor unit of the air conditioner 1000.
In some embodiments of the present invention, the heat exchanger 100 may be detachably fixed in the air conditioner 1000, and at this time, it may be fixed by using, for example, bolts or fasteners, and in addition, the fixing position of the heat exchanger 100 in the air conditioner 1000 is not limited, for example, when the heat exchanger 100 is installed in the outdoor unit of the air conditioner 1000, the heat exchanger 100 may be fixed to the side plate 200, the middle partition plate 300, the side plate 400, etc. of the outdoor unit, which is not described herein in detail.
In addition, other configurations of the air conditioner 1000 according to the embodiment of the present invention, such as a fan, etc., are known to those skilled in the art after the type of the air conditioner 1000 is determined, and will not be described in detail herein.
Next, a heat exchange unit 1 according to one specific example of the present invention is described.
In this example, two headers 11 extend along the horizontal direction, the heat exchange unit 1 includes a plurality of fins 12, the plurality of fins 12 are arranged at intervals along the length direction of the headers 11, each fin 12 extends along the vertical direction, one side of the thickness of each fin 12 is provided with a plurality of capillaries 13, the plurality of capillaries 13 are arranged at intervals along the width direction of the fins 12, and each capillary 13 extends along the vertical direction.
Thereby, when the heat exchanger 100 is used as an evaporator, the drainage of condensed water is facilitated. Moreover, because each capillary tube 13 is vertically arranged, compared with the scheme that the refrigerant tubes in the tube-fin heat exchanger extend along the horizontal direction and are distributed at intervals in the vertical direction, the refrigerant distribution in each capillary tube 13 is not influenced by gravity, and the uniform distribution of two-phase flow is realized. Of course, the heat exchanger 100 of the present invention is not limited to the above arrangement, and the heat exchanger 100 is not limited to being used as an evaporator.
In addition, the utility modelThe heat exchange unit 1 of the present example was also compared with a fin-and-tube heat exchanger and a microchannel heat exchanger in the related art by experiments based on the theory of heat transfer, and data of the heat exchange amount Q (unit: Kcal/h.k) of different heat exchangers 100 under the same conditions (as shown in fig. 6) and the air-side heat exchange coefficient h were set in the experimentsoThe data (in W/m2.k) (as shown in FIG. 7) and the data of the air-side pressure drop (in Pa) (as shown in FIG. 8) indicate that the heat exchange unit 1 of this example has more excellent heat exchange capacity.
According to the theoretical formula of heat transfer:
heat exchange quantity Q ═ K.A0·ΔT
Total heat transfer coefficient
Air side heat transfer coefficient ho＝(Ap+η·Af)/Ao×ha
Wherein Q is the heat exchange capacity of the heat exchanger 100, K is the total heat transfer coefficient of the heat exchanger 100, and hwIs a refrigerant side heat conductivity, AoIs the air side heat transfer area, h, of the heat exchanger 100oIs the air side heat transfer coefficient of the heat exchanger 100, Ap is the heat transfer area of the capillary tube 13, haApi is the heat transfer area of the refrigerant side, Af is the heat transfer area of the fins 12, A is the air side heat transfer rate of the fins 12coContact area of fin 12 and capillary 13, η heat exchange efficiency of fin 12, hcIn the contact conductivity between the fin 12 and the capillary tube 13, Δ T is a temperature difference, tp is an air-side temperature difference of the heat exchanger 100, and λ p is an air-side heat transfer rate of the heat exchanger 100.
In fig. 6, the abscissa is the wind speed, the ordinate is the heat exchange amount of the heat exchanger 100, the curve shown in L1 represents the wind speed-heat exchange amount curve of the heat exchange unit 1 of the present example, the curve shown in L2 represents the wind speed-heat exchange amount curve of the tube and fin heat exchanger, and the curve shown in L3 represents the wind speed-heat exchange amount curve of the microchannel heat exchanger. As can be seen from the figure, the heat exchange amount Q of the heat exchange unit 1 of the present example is relatively high under the condition of the same wind speed.
In FIG. 7, the abscissa isWind speed, ordinate is air side heat exchange coefficient hoThe curve shown in L1 ' represents the wind speed-air side heat exchange coefficient curve of the heat exchange unit 1 of the present example, the curve shown in L2 ' represents the wind speed-air side heat exchange coefficient curve of the tube fin heat exchanger, and the curve shown in L3 ' represents the wind speed-air side heat exchange coefficient curve of the microchannel heat exchanger. As can be seen from the figure, the air side heat exchange coefficient h of the heat exchange unit 1 of the present example is equal to the air speedoIs relatively high.
In fig. 8, the abscissa is the wind speed, the ordinate is the air side pressure drop, the curve shown by L1 "represents the wind speed-air side pressure drop curve of the heat exchange unit 1 of the present example, the curve shown by L2" represents the wind speed-air side pressure drop curve of the tube and fin heat exchanger, and the curve shown by L3 "represents the wind speed-air side pressure drop curve of the microchannel heat exchanger. As can be seen from the figure, under the condition of the same wind speed, the air side pressure drop of the heat exchange unit 1 and the microchannel heat exchanger of the present example is relatively low, which indicates that the wind resistance is small and the heat exchange efficiency is better.
Through the three groups of experiments, the heat exchange unit 1 in the example has small thermal contact resistance between the capillary tube 13 and the fins 12, so that the heat exchange efficiency of the fins 12 can be effectively improved, the total heat transfer coefficient of the heat exchange unit 1 is improved, and the overall heat exchange capacity of the heat exchanger 100 is further improved.
In the description of the present invention, it is to be understood that the terms "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of description of the present invention and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (12)
1. A heat exchanger, characterized in that the heat exchanger comprises at least one heat exchange unit, the heat exchange unit comprising:
the fin, the thickness one side of the said fin has positioning structure;
the two collecting pipes are respectively positioned at two sides of the length of the fin;
and the capillary tube is positioned and matched on one side of the thickness of the fin through the positioning structure, and the two ends of the length of the capillary tube are respectively communicated with the two collecting pipes.
2. The heat exchanger of claim 1, wherein the capillary tube is positionally fixed to the fin by a plurality of said locating structures disposed at spaced intervals along the length of the capillary tube.
3. The heat exchanger of claim 1, wherein the fin has a plurality of capillaries spaced across the width of the fin, each of the capillaries being in locating engagement with the fin by at least one of the locating structures.
4. The heat exchanger of claim 1, wherein the locating structure defines a locating groove, a length of the capillary tube being located to fit within the locating groove.
5. The heat exchanger of claim 4, wherein the retaining groove includes an inlet groove section and a retaining groove section, the inlet groove section being located on a side of the retaining groove section remote from the fin, the inlet groove section having a groove width that gradually increases in a direction away from the retaining groove section.
6. The heat exchanger of claim 5, wherein the positioning groove segments have a groove width that gradually increases in a direction away from the inlet groove segment.
7. The heat exchanger of claim 4, wherein the locating structure comprises two plates defining the locating slot therebetween.
8. The heat exchanger of claim 7, wherein the plates are punched from the fins.
9. The heat exchanger of claim 1, wherein the capillary tube is welded to the fin.
10. The heat exchanger of claim 1, wherein the heat exchange unit comprises a plurality of the fins, the plurality of the fins are arranged in sequence along the thickness direction of the fins, and the positioning structure is clamped between two adjacent fins to limit the distance between the two adjacent fins.
11. The heat exchanger according to claim 1, wherein both of the headers extend in a horizontal direction, the heat exchange unit includes a plurality of the fins, the plurality of the fins are arranged at intervals along a length direction of the header, each of the fins extends in a vertical direction, a plurality of the capillaries are provided on a thickness side of each of the fins, the plurality of the capillaries are arranged at intervals along a width direction of the fin, and each of the capillaries extends in a vertical direction.
12. An air conditioner characterized by comprising the heat exchanger according to any one of claims 1 to 11.
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| CN201921852142.5U CN210688818U (en) | 2019-10-30 | 2019-10-30 | Heat exchanger and air conditioner with same |
| PCT/CN2019/121279 WO2021082149A1 (en) | 2019-10-30 | 2019-11-27 | Heat exchanger and air conditioner provided with same |
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| CN110595112A (en) * | 2019-10-30 | 2019-12-20 | 广东美的制冷设备有限公司 | Heat exchanger and air conditioner with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595112A (en) * | 2019-10-30 | 2019-12-20 | 广东美的制冷设备有限公司 | Heat exchanger and air conditioner with same |
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