阅读说明：本技术 换热器和具有其的空调器 (Heat exchanger and air conditioner with same ) 是由 李成恩 武滔 于 2019-10-30 设计创作，主要内容包括：本发明公开了一种换热器和具有其的空调器,所述换热器包括至少一个换热单元,所述换热单元包括：翅片、集流管和毛细管,所述翅片的厚度一侧具有定位结构,所述集流管为两个且分别位于所述翅片的长度两侧,所述毛细管通过所述定位结构定位配合于所述翅片的厚度一侧,且所述毛细管的长度两端分别与两个集流管连通。根据本发明的换热器,所述换热器的换热单元的冷凝水排放顺畅、空气流动阻力小、换热能效高,且翅片与毛细管的接触面积大,翅片换热效率高,而且通过定位结构使毛细管与翅片定位配合,从而降低了毛细管的装配难度,提高了毛细管的装配效率,在一定程度上提高了毛细管与翅片的换热可靠性和换热均匀性。(The invention discloses a heat exchanger and an air conditioner with the same, wherein the heat exchanger comprises at least one heat exchange unit, and the heat exchange unit comprises: 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 heat exchanger, the condensed water of the heat exchange unit of the heat exchanger is discharged smoothly, the air flow resistance is small, the heat exchange efficiency is high, the contact area between the fins and the capillary tube is large, the heat exchange efficiency of the fins is high, and the capillary tube and the fins are matched in a positioning mode through the positioning structure, so that the assembly difficulty of the capillary tube is reduced, the assembly efficiency of the capillary tube is improved, and the heat exchange reliability and the heat exchange uniformity of the capillary tube and the fins are improved to a certain extent.)

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.

Technical Field

The invention relates to the technical field of air conditioners, in particular to a heat exchanger and an air conditioner with the same.

Background

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a heat exchanger, a heat exchange unit of the heat exchanger has smooth condensed water discharge, small air flow resistance, high heat exchange efficiency, large heat exchange area between a fin and a capillary tube and high heat exchange efficiency of the fin, and the capillary tube and the fin are matched in a positioning way through a positioning structure, so that the assembly difficulty of the capillary tube is reduced, the assembly efficiency of the capillary tube is improved, and the heat exchange reliability and the heat exchange uniformity of the capillary tube and the fin are improved to a certain extent.

The invention also provides an air conditioner with the heat exchanger.

According to an embodiment of the first aspect of the invention, the heat exchanger comprises at least one heat exchange unit, the heat exchange unit comprises: 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 heat exchanger, the condensed water of the heat exchange unit of the heat exchanger is discharged smoothly, the air flow resistance is small, the heat exchange efficiency is high, the contact area between the fins and the capillary tube is large, the heat exchange efficiency of the fins is high, and the capillary tube and the fins are matched in a positioning mode through the positioning structure, so that the assembly difficulty of the capillary tube is reduced, the assembly efficiency of the capillary tube is improved, and the heat exchange reliability and the heat exchange uniformity of the capillary tube and the fins are improved 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.

An air conditioner according to an embodiment of the second aspect of the present invention includes the heat exchanger according to the embodiment of the first aspect of the present invention.

According to the air conditioner, the heat exchanger of the first aspect is arranged, so that the overall heat exchange performance of the air conditioner is 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 diagram of an air conditioner according to one embodiment of the present invention;

FIG. 2 is a schematic view of a heat exchange unit according to one embodiment of the present invention, with one fin hidden between each adjacent two fins;

FIG. 3 is a schematic illustration of a fin in positional engagement with a capillary tube via a locating structure according to one embodiment of the present invention;

FIG. 4 is an enlarged view of portion A circled in FIG. 3;

FIG. 5 is a schematic illustration of fins defining a pitch from fin by locating structure according to one embodiment of the present invention;

FIG. 6 is a graph showing experimental comparison of heat exchange capacity of a heat exchanger in accordance with one embodiment of the present invention with a tube and fin heat exchanger, a microchannel heat exchanger;

FIG. 7 is a graph of experimental comparison of air side heat transfer coefficients for a heat exchanger according to one embodiment of the present invention with a tube and fin heat exchanger, a microchannel heat exchanger;

fig. 8 is a graph showing experimental comparison of air side pressure drop for heat exchangers in accordance with one embodiment of the present invention with tube and fin heat exchangers and microchannel heat exchangers.

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 or similar 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 illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. 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 invention 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 will be 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 invention, as shown in FIG. 3, the capillary tube 13 is position-fitted to the fin 12 by a plurality of locating structures 14 spaced apart 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 along the width of the fin 12, and each capillary 13 is position-fitted to the fin 12 by 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 columns of positioning groups spaced apart in the width direction of the fin 12, each column of positioning groups including a plurality of positioning structures 14 spaced apart in 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 in the width direction of the fin 12, and each capillary 13 is positioned and fitted to the fin 12 by the plurality of positioning structures 14 spaced apart in 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 groups spaced apart in the width direction of the fin 12, each row of positioning groups including three positioning structures 14 spaced apart 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 in the width direction of the fin 12, and each capillary 13 is positioned and fitted to the fin 12 by the three positioning structures 14 spaced apart 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 length of the capillary tube 13 along the length may fit 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 punched from 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, and 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, and at this time, the punched portion may be regarded as one plate 141, that is, the plate 141 is punched from the fin 12, thereby facilitating the processing and saving the material.

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 also 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 a side of the positioning groove section 1402 away from the fin 12, and a groove width of the inlet groove section 1401 may gradually increase in 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 segment 1402 may also be an equal-width groove segment, and so on, which are 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 may also be welded and fixed to the fin 12, that is, after the capillary 13 is located and fitted to the fin 12 by the locating structure 14, the capillary 13 and the fin 12 may also be fixed together by welding, so as to ensure the connection reliability of 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, the welding step may be omitted when the positioning reliability of the positioning structure 14 meets the connection requirement. However, it is understood that providing a soldering step improves the reliability of the connection of the capillary 13 to the fin 12.

In some embodiments of the present invention, when the fins 12 are welded to the capillaries 13, the capillaries 13 and the headers 11 can also be welded, so that the heat exchange unit 1 can be an integral unit which is not detachable, thereby improving the reliability and heat exchange performance of the heat exchanger 100 as a whole, and reducing the processing difficulty of the heat exchange unit 1, so that the heat exchange unit can be manufactured more easily and efficiently.

In some embodiments of the present invention, as shown in fig. 5, the heat exchange 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 far from the fin 12 where the positioning structure is located is clamped against the next fin 12 adjacent to the fin 12, so as to define 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 that the overall heat exchange performance of the heat exchanger 100 may be further improved. For example, in a specific example of the present invention, the heat exchanger 100 may include two heat exchange units 1 and a connection unit 2 connected between the two heat exchange units 1, where each heat exchange unit 1 may include two headers 11 spaced and arranged in parallel along an up-down direction, and a fin 12 and a capillary tube 13 arranged perpendicular to the header 11, the headers 11 of the two heat exchange units 1 are arranged perpendicular to each other, so that the heat exchanger 100 is substantially an L-shaped heat exchanger 100 when the heat exchanger 100 performs an orthographic projection from top to bottom, the connection unit 2 may include two connection pipes 21 and a baffle 22, the two connection pipes 21 are respectively connected to the two headers 11 of the two heat exchange units 1, and the baffle 22 is connected between the two connection pipes 21, so as to avoid a problem that an atmospheric air flow flows away from between the two connection pipes 21 and heat exchange efficiency is. Of course, the present invention is not limited thereto, and in other embodiments of the present invention, the structure of the connection unit 2 and the number of the heat exchange units 1 may be adjusted, so that the heat exchanger 100 is substantially U-shaped when the heat exchanger 100 performs an orthographic projection from top to bottom, and the like, thereby increasing the heat exchange area of the heat exchanger 100, further improving the heat exchange efficiency of the heat exchanger 100, and adapting to energy efficiency 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 second aspect of the present invention may include a heat exchanger 100 according to an embodiment of the first aspect of the present invention. According to the air conditioner 1000 of the embodiment of the present invention, since the heat exchange efficiency of the heat exchanger 100 can be improved, the overall energy efficiency of the air conditioner 1000 can be improved.

Specifically, the type of the air conditioner 1000 according to the embodiment of the second aspect 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 first aspect 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, the heat exchanger 100 may be fixed by using a form of, for example, a bolt, a buckle, and the like, and 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 an outdoor unit of the air conditioner 1000, the heat exchanger 100 may be fixedly connected to the side plate 200, the middle partition plate 300, the side plate 400, and the like of the outdoor unit, which will not be described herein again.

In addition, other configurations of the air conditioner 1000 according to an embodiment of the present invention, such as a fan, etc., are known to those of ordinary skill 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 use as an evaporator.

Furthermore, the inventors also compared the heat exchange unit 1 of the present example with the tube fin heat exchanger and the microchannel heat exchanger in the related art by experiments based on the theory of heat transfer, and set data (as shown in FIG. 6) of the heat exchange amount Q (unit: Kcal/h.k) and the air-side heat exchange coefficient h of the heat exchanger 100 in the same case_oThe 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 h_o＝(Ap+η·Af)/A_o×h_a

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 h_wIs a refrigerant side heat conductivity, A_oIs the air side heat transfer area, h, of the heat exchanger 100_oIs the air side heat transfer coefficient of the heat exchanger 100, Ap is the heat transfer area of the capillary tube 13, h_aApi 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 12_coIs the contact area of the fin 12 and the capillary tube 13, η is the heat exchange efficiency of the fin 12, h_cIn 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 represents the wind speed and the ordinate represents the air-side heat transfer coefficient h_oThe 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 speed_oIs 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 those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, 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 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.