CN210533101U - Flat plate fin, micro-channel heat exchanger and air conditioner - Google Patents

Abstract

The utility model discloses a dull and stereotyped fin and microchannel heat exchanger, air conditioner relates to heat transfer technical field for improve the drainage of heat exchanger. The embodiment of the utility model provides a flat plate fin sets up along vertical direction, has seted up the flat tub of mounting groove of microchannel on this flat plate fin, wherein, flat plate fin have at least one side be equipped with flat plate fin vertically water deflector, the water deflector is used for collecting the comdenstion water on the flat plate fin and drains to flat plate fin's edge. The utility model is used for improve the drainage of heat exchanger.

Description

Flat plate fin, micro-channel heat exchanger and air conditioner

Technical Field

The utility model relates to a heat transfer technical field especially relates to a dull and stereotyped fin and microchannel heat exchanger, air conditioner.

Background

Compared with a finned tube heat exchanger, the microchannel heat exchanger has remarkable advantages in the aspects of material cost, refrigerant charge amount, heat flux density and the like, and accords with the development trend of energy conservation and environmental protection of the heat exchanger. Meanwhile, due to the reasons of small space distance, high heat exchange speed and the like in the microchannel heat exchanger, when the microchannel heat exchanger is used as an evaporator, the problems of slow drainage, uneven condensed water distribution, fast frosting, slow defrosting and the like exist, and the application of the microchannel evaporator is limited.

Specifically, a typical microchannel heat exchanger includes three major components, namely a microchannel flat tube arranged horizontally, a fin connected with the microchannel flat tube, and a header connected with the microchannel flat tube. Fig. 1 is a schematic diagram of a microchannel heat exchanger 10 in the prior art. The device comprises a plurality of groups of horizontally arranged micro-channel flat tubes 11, fins 12 connected with the micro-channel flat tubes 11 among the micro-channel flat tubes 11, and collecting pipes 13 connected to two ends of the micro-channel flat tubes 11. Fig. 2 is a schematic sectional view of the microchannel flat tube 11 and the fin 12 in the direction a-a in fig. 1. Wherein, the fin 12 is arranged in the vertical direction, and the fin 12 is provided with a micro-channel flat tube mounting groove 121 for mounting the micro-channel flat tube 11.

In the conventional microchannel heat exchanger 10 shown in fig. 1 and 2, the spatial distance between the microchannel flat tubes 11 and the fins 12 is small, and the water flow is blocked more when being discharged in the vertical direction, so that the drainage and defrosting performance of the microchannel heat exchanger is affected.

At this time, the design of the fins directly determines the drainage and defrosting performance of the microchannel heat exchanger, and is a key factor influencing the performance of the microchannel heat exchanger.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a dull and stereotyped fin and microchannel heat exchanger, air conditioner for improve the drainage of heat exchanger.

In order to achieve the above object, the embodiments of the present invention adopt the following technical solutions:

in a first aspect, the embodiment of the utility model provides a flat plate fin, along vertical direction setting, seted up the flat pipe mounting groove of microchannel on this flat plate fin, wherein, flat plate fin have at least one side be equipped with flat plate fin vertically water deflector, the water deflector is used for collecting the comdenstion water on the flat plate fin and drains to flat plate fin's edge.

The utility model discloses plate fin is equipped with the water deflector with plate fin vertically through at least one side at plate fin to when making have the comdenstion water gathering on plate fin, can collect the comdenstion water and drainage to plate fin's edge. Thereby can make the adoption the utility model discloses the microchannel heat exchanger of plate fin, when being used as the evaporimeter, can in time discharge the comdenstion water in the microchannel heat exchanger, reduce the windage of microchannel heat exchanger, reduce the frosting volume and improve defrosting speed.

In a second aspect, the embodiment of the utility model provides a still provide a microchannel heat exchanger, the flat pipe of microchannel still includes the dull and stereotyped fin that above-mentioned first aspect provided, the flat pipe of microchannel wears to establish dull and stereotyped fin in the flat pipe mounting groove of microchannel.

The utility model discloses microchannel heat exchanger, when realizing the function of evaporimeter, can in time discharge the comdenstion water in the microchannel heat exchanger, reduce the windage of microchannel heat exchanger, reduce the frosting volume and improve defrosting speed.

The embodiment of the utility model provides a third aspect still provides an air conditioner, including heat transfer system, wherein be equipped with the microchannel heat exchanger that the above-mentioned second aspect provided in the heat transfer system.

The embodiment of the utility model provides an air conditioner can reduce the windage of microchannel heat exchanger, reduce the microchannel heat exchanger volume of frosting and improve defrosting speed, and then has strengthened the effect of heating of air conditioner, improves user's use and experiences.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a microchannel heat exchanger according to the prior art;

FIG. 2 is a schematic cross-sectional view along A-A of the fin and the microchannel flat tube in the microchannel heat exchanger shown in FIG. 1;

fig. 3 is a schematic structural diagram of a plate fin according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of the plate fin of FIG. 3 taken along the direction B-B;

fig. 5 is a schematic perspective view of another plate fin provided in an embodiment of the present invention;

FIG. 6 is a second schematic structural view of the plate fin shown in FIG. 5;

FIG. 7 is a schematic cross-sectional view of the plate fin of FIG. 6 taken along the direction C-C;

fig. 8 is a schematic structural diagram of another plate fin provided in an embodiment of the present invention;

FIG. 9 is a third schematic structural view of the plate fin shown in FIG. 5;

fig. 10 is a schematic structural diagram of another plate fin according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a microchannel heat exchanger according to an embodiment of the present invention.

Reference numerals:

10-a microchannel heat exchanger; 11-flat tube; 12-a fin; 121-microchannel flat tube mounting grooves; 13-collecting pipe; 20-plate fins; 21-microchannel flat tube mounting grooves; 22-a water deflector; 221-horizontal segment; 222-an inclined section; 23-a wind guide hole; 24-a first extension; 241-transverse reinforcing ribs; 25-a second extension; 251-a vertical reinforcing rib; 26-flanging the flat tube slot; 30-microchannel flat tubes; 40-microchannel heat exchanger.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

The first embodiment is as follows:

as shown in fig. 3 and 4, the embodiment of the present invention provides a plate fin 20, which is disposed along a vertical direction, wherein a micro-channel flat tube mounting groove 21 is disposed on the plate fin 20. Wherein:

at least one side of the plate fin 20 is provided with a water guide plate 22 perpendicular to the plate fin 20. The water guide plate 22 is used for collecting and guiding the condensed water on the flat plate fins to the edges of the flat plate fins.

In particular, the water deflector 22 is disposed at an angle to the horizontal plane, wherein the angle is less than 30 °. Illustratively, as shown in fig. 3, the angle θ between the water guide plate 22 and the horizontal plane is less than 30 °.

In one implementation, the water deflector 22 may be a straight line type as shown in fig. 3. In other implementations, the water deflector 22 may take other shapes. Specifically, the method comprises the following steps:

in the embodiment of the present invention, if the linear water guide plate structure shown in fig. 3 is adopted, the too large angle of the inclined plane included angle θ cannot be realized to avoid the too large projection of the water guide plate on the windward side, which results in the increase of wind resistance and the influence on the heat exchange performance; on the other hand, if the θ angle is too small, the drainage performance of the water guide plate 22 is lowered. In order to solve the above problem, the water guide plate 22 may have a stepped structure as shown in fig. 5 and 6. Specifically, the water guide plate 22 may be formed by connecting a plurality of horizontal sections 221 and a plurality of inclined sections 222.

The included angle between the whole water guide plate 22 formed by connecting the plurality of horizontal sections 221 and the plurality of inclined sections 222 and the horizontal plane is less than 30 degrees.

In addition, in order to avoid the connection between the horizontal section 221 and the adjacent inclined section 222 from forming water accumulation, the included angle between each inclined section 222 and the horizontal plane direction in the plurality of inclined sections 222 constituting the water deflector 22 according to the above embodiments of the present invention may be set within a range smaller than 30 °.

In one implementation, as shown in fig. 8, the water deflector 22 may also adopt an arc-shaped curve structure.

Additionally, in the embodiment of the utility model provides an in order to avoid among the current microchannel heat exchanger, because flat pipe and fin interval up to now is little and then lead to the problem that the dust accumulates on the fin easily, as shown in fig. 3, fig. 5, fig. 6, fig. 8, in the embodiment of the utility model, wind-guiding hole 23 has still been seted up at the middle part of dull and stereotyped fin 22. By arranging the air guide holes 23, the distance between each structural surface in the micro-channel heat exchanger can be increased, dust adsorption is reduced, and air channel blockage is avoided.

In one implementation, in the embodiment of the present invention, as shown in fig. 3 and 8, the water deflector 22 is disposed at an upper edge of the air guiding hole 23. By disposing the water guide plate 22 at the upper edge of the air guide hole 23, the condensed water formed on the upper side of the plate fin 20 can be smoothly flowed onto the water guide plate 22, so as to collect and guide the condensed water.

In another implementation manner, in the embodiment of the present invention, the water deflector 22 may be further disposed at a lower edge of the air guiding hole 23. Therefore, the water guide plate 22 can be used for collecting the condensed water, and when a certain included angle theta exists between the water guide plate 22 and the horizontal plane, the included angle between the water guide plate 22 and the horizontal plane can be used for increasing the wind power on the upper surface of the flat pipe 30, so that the condensed water falling on the upper surface of the flat pipe 30 can be discharged quickly.

In another implementation manner, as shown in fig. 5, 6, and 7, in an embodiment of the present invention, the water deflectors 22 may be further disposed at the upper edge and the lower edge of the air guiding hole 23.

In addition, in the embodiment of the present invention, the water deflector 22 may also be formed by bending the air guiding holes 23 of the plate fins 20 outwards. Furthermore, the plate fin 20 of the embodiment of the present invention may adopt a processing method such as stamping a metal sheet, and a water deflector 22 and an air guiding hole 23 are processed on the metal sheet, so as to produce the plate fin 20.

In addition, in order to further improve the drainage of the plate fins 20, as shown in fig. 3, 5 and 8, the left and right sides of the plate fins 20 are respectively the windward end and the leeward end, wherein the water guide plate 22 is gradually lowered in the direction from the windward end to the leeward end.

In one implementation, as shown in fig. 5 and 6, the windward end of the flat plate fin 20 is extended outward by a first extension section 24 (in the example of fig. 6, the first extension section 24 is a left-side shaded portion in the figure). Wherein, first extension section 24 surpasses microchannel flat pipe mounting groove 21 in vertical direction. The embodiment of the utility model provides an in, through with dull and stereotyped fin 20 to the mode that the end outwards extended to flat pipe mounting groove 21 of microchannel, can delay the frosting speed of dull and stereotyped fin 20 air inlet side.

Further, in order to enhance the structural strength of the first extending section 24, in the embodiment of the present invention, as shown in fig. 5 and 6, a transverse reinforcing rib 241 may be further disposed on the first extending section.

In another implementation, as shown in fig. 5 and 6, the leeward end of the plate fin 20 in the embodiment of the present invention extends outward with a second extension 25 (in the example of fig. 6, the second extension 25 is a right-side shaded portion in the figure). Wherein, the second extension section 25 exceeds the micro-channel flat tube mounting groove 21 in the vertical direction.

Further, in order to enhance the structural strength of the second extending section 25, in the embodiment of the present invention, as shown in fig. 5 and 6, a vertical reinforcing rib 251 may be further disposed on the first extending section. In the embodiment of the present invention, by providing the vertical reinforcing rib 251 on the first extending section, the reinforcing rib 251 can be further utilized to drain the condensed water.

Specifically, as shown in fig. 5, in the embodiment of the present invention, the second extending section 25 extends along the vertical direction and is connected to the plurality of micro-channel flat tube mounting grooves on the plate fin 20.

In addition, in order to avoid the wind guide hole 23 from affecting the structural strength of the plate fin 20, in the embodiment of the present invention, the wind guide hole 23 may be disposed between the first extension section 24 and the second extension section 25, so as to avoid the wind guide hole 23 extending to the first extension section 24 or the second extension section 25 from affecting the structural strength of the plate fin 20. Specifically, as shown in fig. 9, the leftmost end and the rightmost end of the air guide hole 23 are both included in the middle portion between the first extending section 24 and the second extending section 25, that is, the width W of the air guide hole 23 is smaller than the width W' of the microchannel flat tube mounting groove 21. Additionally, the utility model discloses in because the wind-guiding hole 23 does not extend to the second extension 25 in the region, can also avoid the water deflector 22 of the top edge and/or the lower limb department of wind-guiding hole 23 to block the comdenstion water that drains to second extension 25, and then improve drainage.

In addition, in order to improve the collecting and draining functions of the water guide plate 22, in the embodiment of the present invention, an upward and/or downward flange is further disposed on the outer edge of the water guide plate 22, and an upward turned flange is disposed at the position of the dotted line circle in fig. 4 and 7. Wherein, between turn-ups's height h and the thickness delta of plate fin 20, satisfy: h is NxDelta, wherein 1 < N < 3.

Further, in order to facilitate the installation and fixing of the plate fins 20 in the microchannel heat exchanger, it is considered that condensed water may be accumulated on both sides of the plate fins 20 in the microchannel heat exchanger. Therefore, in the embodiment of the present invention, the plate fin 20 further includes:

the extension length L of the water guide plate 22 in the direction perpendicular to the plate fins 20 is equal to the distance Fp between two adjacent rows of plate fins 20 in the microchannel heat exchanger.

For example, as shown in fig. 7, since the extension length L of the water guide plate 22 in the direction perpendicular to the plate fins 20 is equal to Fp, the edge of the plate fin 20 can be abutted against another adjacent plate fin, so that the water guide plate 22 can perform the function of collecting the condensed water on the other adjacent plate fin. In addition, in combination with the above implementation, an upward flanging is further provided on the outer edge of the water guide plate 22, so as to achieve a better condensed water collecting effect.

Further, as shown in fig. 9, when the water deflectors 22 are disposed at both the upper edge and the lower edge of the air guiding hole 23, in order to facilitate mounting and fixing the plate fin 20 in the microchannel heat exchanger, the extension lengths of the water deflectors 22 at the upper edge and the lower edge of the air guiding hole 23 may be equal, and the height H of the air guiding hole 23 may satisfy: h is 2(Fp- δ) +2(N × δ), where Fp is the distance between two adjacent rows of plate fins 20 in the microchannel heat exchanger, δ is the thickness of the plate fins 20, and 1 < N < 3.

In the embodiment of the present invention, the extending length of the water deflector 22 at the upper edge and the lower edge of the air guiding hole 23 is equal, and the height H of the air guiding hole 23 satisfies: since H is 2(Fp- δ) +2(N × δ), after the plate fin 20 is mounted in the microchannel heat exchanger, the edges of the water guide plate 22 at the upper edge and the lower edge of the air guide hole 23 can be brought into contact with the adjacent fin, and the water guide plate 22 can function to collect the condensed water on the other adjacent plate fin. In addition, the structural strength of the micro-channel heat exchanger can be improved.

In addition, in the embodiment of the present invention, in order to avoid water accumulation between the seams of the flat microchannel tubes 30 and the flat plate fins 20, as shown in fig. 5, a flat tube groove flange 26 is further provided around the flat microchannel tube mounting groove on the flat plate fins 20.

In another implementation, as shown in fig. 10, in the embodiment of the present invention, the windward end and the leeward end of the plate fin 20 are also designed symmetrically. The water guide plate 22 is formed in an inverted V shape. The embodiment of the utility model provides a through above-mentioned design, can obtain the equal cross-section runner of windward district radiating part and leeward district radiating part of plate fin 20.

The utility model discloses plate fin is equipped with the water deflector with plate fin vertically through at least one side at plate fin to when making have the comdenstion water gathering on plate fin, can collect the comdenstion water and drainage to plate fin's edge. Thereby can make the adoption the utility model discloses the microchannel heat exchanger of plate fin, when being used as the evaporimeter, can in time discharge the comdenstion water in the microchannel heat exchanger, reduce the windage of microchannel heat exchanger, reduce the frosting volume and improve defrosting speed.

Example two:

the embodiment of the utility model provides a still provide a microchannel heat exchanger 40, as shown in fig. 11, including microchannel flat tube 30, still include the plate fin 20 that above-mentioned embodiment provided. The micro-channel flat tubes 30 are inserted into the micro-channel flat tube mounting grooves 21 of the plate fins 20 (the micro-channel flat tube mounting grooves 21 are not shown in fig. 11, and the description of the micro-channel flat tube mounting grooves 21 can refer to the corresponding contents of the first embodiment).

In addition, as shown in fig. 11, in the microchannel heat exchanger 40, a plurality of plate fins 20 are provided, and the plurality of plate fins 20 are uniformly arranged at intervals, the microchannel flat tubes 30 sequentially pass through the microchannel flat tube installation grooves 21 of the plurality of plate fins 20, and both ends of the water guide plate 22 (the water guide plate 22 is not shown in fig. 11, and the description of the water guide plate 22 can refer to the corresponding contents of the first embodiment) are respectively abutted on two adjacent plate fins 20.

The utility model discloses implement two kinds, through the both ends respectively butt with water deflector 22 two adjacent on the dull and stereotyped fin 20 to can make water deflector 22 realize collecting the function of the comdenstion water on another adjacent dull and stereotyped fin, can also improve the structural strength of microchannel heat exchanger in addition.

The utility model discloses microchannel heat exchanger 40, when realizing the function of evaporimeter, can in time discharge the comdenstion water among microchannel heat exchanger 40, reduce microchannel heat exchanger 40's windage, reduce the amount of frosting and improve defrosting speed. The utility model discloses the microchannel heat exchanger 40 that above-mentioned embodiment provided can make the comdenstion water that flows to the flat pipe 30 upper surface of microchannel reduce more than 50%, makes the drainage rate greatly increased of heat exchanger moreover, and simultaneously, microchannel heat exchanger 40 can also make the heat transfer thermal resistance of air and refrigerant reduce, improves the heat transfer performance of heat exchanger. In addition, in the micro-channel heat exchanger 40, the frosting on the surface of the heat exchanger is more uniform, and the attenuation rate of the frosting performance is effectively reduced. During defrosting operation, the drainage speed of defrosting water is increased, and the low-temperature heating performance is improved. Additionally, the embodiment of the utility model provides a microchannel heat exchanger 40 surface is difficult to take place the ash stifled, plays the promotion effect to heat exchanger's long-term operation.

Example three:

an air conditioner comprises a heat exchange system, wherein the micro-channel heat exchanger provided by the second aspect is arranged in the heat exchange system.

The utility model discloses refrigerator because refrigeration cycle's evaporimeter is foretell microchannel heat exchanger assembly, consequently, can improve the radiating efficiency, and small, light in weight saves the refrigeration plant inner space, and solves the not thorough problem of defrosting.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (11)

1. The flat plate fin is arranged in the vertical direction, and the flat plate fin is provided with a micro-channel flat tube mounting groove.

2. The plate fin as claimed in claim 1, wherein the water guide plate is disposed at an angle of less than 30 ° to a horizontal plane.

3. The plate fin as claimed in claim 1, wherein the water guide plate is one of a linear type, a stepped type and an arc-shaped curved type.

4. The flat plate fin according to any one of claims 1 to 3, wherein a wind guide hole is formed in the middle of the flat plate fin, and the water deflector is arranged at the upper edge and/or the lower edge of the wind guide hole.

5. The plate fin as claimed in claim 4, wherein the water guide plate is formed by bending the air guide hole of the plate fin outwards.

6. The plate fin as claimed in claim 1, wherein the left and right ends of the plate fin are a windward end and a leeward end, respectively, and the water deflector is lower and lower along the direction from the windward end to the leeward end.

7. The plate fin as claimed in claim 6, wherein a first extension section extends outwards from the windward end of the plate fin, and the first extension section vertically exceeds the microchannel flat tube mounting groove.

8. The plate fin as claimed in claim 6, wherein a second extension section extends outwardly from a leeward end of the plate fin, and the second extension section extends vertically beyond the microchannel flat tube mounting groove.

9. A micro-channel heat exchanger comprises micro-channel flat tubes and is characterized by further comprising flat plate fins according to any one of claims 1 to 8, wherein the micro-channel flat tubes are arranged in the micro-channel flat tube installation grooves of the flat plate fins in a penetrating mode.

10. The micro-channel heat exchanger according to claim 9, wherein the number of the plate fins is multiple, the plate fins are arranged at regular intervals, the micro-channel flat tubes sequentially pass through the micro-channel flat tube mounting grooves of the plate fins, and two ends of the water guide plate are respectively abutted against two adjacent plate fins.

11. An air conditioner comprising a heat exchange system, wherein the microchannel heat exchanger of claim 9 or 10 is disposed in the heat exchange system.

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