CN211012555U

CN211012555U - Flat plate fin, micro-channel heat exchanger and air conditioner

Info

Publication number: CN211012555U
Application number: CN201921316493.4U
Authority: CN
Inventors: 刘晓蕾
Original assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2020-07-14
Anticipated expiration: 2029-08-14

Abstract

The utility model discloses a dull and stereotyped fin and microchannel heat exchanger, air conditioner relates to heat transfer technical field for improve microchannel heat exchanger's drainage. This plate fin sets up along vertical direction, and plate fin includes connecting portion and a plurality of fin main part that extend along vertical direction, and wherein a plurality of fin main parts set up on one side of connecting portion along the length direction equidistance interval of connecting portion, and connecting portion and a plurality of fin main part are located the coplanar, constitute flat tub of installing port between the side of two adjacent fin main parts from top to bottom. The surface of the fin main body is not provided with cracks and gaps penetrating through two surfaces of the fin main body, and the surface of the fin main body is not provided with discontinuous convex structures except for side edge positions. The utility model discloses be applied to the heat transfer.

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

It is known that when the surface temperature of an object is lower than the dew point temperature of air, water vapor in the air is precipitated, and this phenomenon is called condensation. When the heat exchanger exchanges heat with air in the air conditioner, along with the evaporation of a refrigerant in the heat exchanger, the surface of the inner fin of the heat exchanger is often accompanied with a condensation process. And condensed water formed by condensation among fins in the air-conditioning heat exchanger needs to be discharged in time, otherwise the problems of heat exchange performance attenuation, air supply quality reduction, fan resistance increase and the like can be caused.

In addition, in the prior art, in order to improve the heat exchange efficiency of the heat exchanger, the surface of the fin in the prior heat exchanger is often designed with structures such as a window and a slot.

The utility model discloses in discover, very easily form the water bridge in the clearance department of windowing or cracking, and clearance department frosts just easily when ambient temperature is less than the freezing point, and water bridge and frosting all can cause the wind channel to block up.

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, flat plate fin includes along connecting portion and a plurality of fin main part that vertical direction extends, and wherein a plurality of fin main parts set up on one side of connecting portion along the length direction equidistance interval of connecting portion, and connecting portion and a plurality of fin main part are located the coplanar, constitute flat tub of installing port between the side of two upper and lower adjacent fin main parts. The surface of the fin main body is not provided with cracks and gaps penetrating through two surfaces of the fin main body, and the surface of the fin main body is not provided with discontinuous convex structures except for side edge positions.

The embodiment of the utility model provides an in consider in current microchannel heat exchanger, for the heat exchange efficiency who improves the heat exchanger, be equipped with windowing more on the surface of fin and crack isotructure. Thus, although the heat exchange efficiency is improved, water bridges and frosting are easily formed at the gaps of the discontinuous structure, and the air duct is blocked, so that the heat exchange efficiency cannot be improved, and the problems of easy frosting, low defrosting efficiency and the like of the micro-channel heat exchanger can be caused. Based on the above consideration, the utility model provides an among the plate fin, the surface of fin main part adopts the design of continuity, fin main part surface does not have the hole of splitting, the gap that can run through fin main part two sides promptly, do not have discontinuous protruding structure in addition except that fin main part side outer fin main part, thereby all kinds of gaps that can deposit water on the at utmost reduction plate fin, avoid the comdenstion water to save on plate fin and form the water bridge, the frost, avoid the wind channel to block up, thereby reduce microchannel heat exchanger's frosting speed, improve defrosting efficiency.

In a second aspect, the embodiment of the present invention further provides a micro channel heat exchanger, a micro channel flat tube, a flat plate fin provided by the above first aspect, and a micro channel flat tube arranged in the micro channel flat tube mounting groove of the flat plate fin.

The utility model discloses microchannel heat exchanger when realizing the function of evaporimeter, can avoid the comdenstion water to collect together on microchannel heat exchanger and form the water bridge, frosting, avoids the wind channel to block up to reduce microchannel heat exchanger's frosting speed, improve defrosting efficiency.

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 avoid the comdenstion water to build up on the microchannel heat exchanger and form the water bridge, frosting, avoids the wind channel to block up, and then has strengthened the effect that heats 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 structural diagram of a plate fin according to an embodiment of the present invention;

fig. 2 is a second schematic structural diagram of a plate fin according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a microchannel heat exchanger according to an embodiment of the present invention;

fig. 4 is the embodiment of the utility model provides a structural schematic of flat pipe.

Reference numerals:

10-plate fins; 11-a fin body; 111-transverse corrugated protrusions; 112-obliquely upward corrugated protrusions; 113-a first flange; 114-a second flange; 12-a connecting part; 121-longitudinal corrugated protrusions; 13-flat tube mounting port; 20-flat tube; 30-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. 1, the plate fin 10 provided by the embodiment of the present invention is disposed along a vertical direction. The plate fin 10 includes a connecting portion 12 extending in a vertical direction and a plurality of fin bodies 11, wherein the plurality of fin bodies 11 are disposed on one side edge of the connecting portion 12 at equal intervals in an extending direction of the connecting portion 12. The connecting part 12 and the plurality of fin bodies 11 are located on the same plane, and flat tube mounting openings 13 are formed between the side edges of two vertically adjacent fin bodies 11.

The surface of the fin body 11 has no cracks or gaps penetrating through two surfaces of the fin body 11, and the surface of the fin body 11 has no discontinuous convex structure except for the side edges.

Specifically, the split holes and the gaps penetrating through the two surfaces of the fin body 11 specifically include: windowing, bridging, vortex generating structures, etc.

Wherein, the protruding structure that has the discontinuity specifically includes: local flanging, a boss with a tension crack hole, staggered sawteeth and the like. The local flanging specifically comprises a flanging structure which plays a role in positioning the distance positions of adjacent fins in the plurality of fins in the microchannel heat exchanger, and a flanging structure which plays a role in collecting and draining condensed water and the like.

In addition, consider that the surface of the plate fin 10 provided by the embodiment of the present invention is continuity, so compared with other fins having discontinuous structures such as windowing and bosses, the plate fin 10 provided by the present invention needs to be further strengthened in terms of overall structural strength.

Further, as shown in fig. 1 and 2, in the side of the fin body 11 near the windward end, the portion near the edge has a lateral corrugated protrusion 111.

As shown in fig. 1 and 2, of the left and right sides of the plate fin 10, the side close to the fin body 11 is a windward end, and the side close to the connecting portion 12 is a leeward end.

The embodiment of the utility model provides an in, through in the one side that is close to the windward end on fin main part 11, the part that closes on the edge sets up horizontal corrugate protruding 111, and then has strengthened plate fin 10's structural strength. In addition, due to the adoption of the transverse design, the influence of the corrugated bulges 111 on the wind resistance can be reduced as much as possible, and the heat exchange efficiency is improved.

In addition, in order to enhance the structural strength of the plate fin 10, as shown in fig. 1 and 2, in the embodiment of the present invention, the connecting portion 12 is provided with a longitudinal corrugated protrusion 121.

In the embodiment of the present invention, the longitudinal corrugated protrusion 121 is disposed on the connecting portion 12, so as to enhance the structural strength of the plate fin 10. In addition, since the possibility of the condensed water collecting at the connecting portion 12 located at the leeward end of the plate fin 10 is higher than that at other positions, the corrugated protrusion 121 is arranged in the vertical direction, which is also advantageous for guiding the condensed water to be discharged, thereby improving the drainage performance of the connecting portion 12.

In addition, in order to enhance the structural strength of the plate fin 10, as shown in fig. 1 and 2, in the fin body 11, an obliquely upward corrugated protrusion 112 is provided in a region between the two flat tube attachment ports 13. Specifically, as shown in fig. 2, on the fin body 11, a region between two dotted lines is a region between two flat tube mounting ports 13, and an obliquely upward corrugated protrusion 112 is provided in the region.

As shown in fig. 2, the corrugation of the obliquely upward corrugated protrusion 112 is specifically obliquely upward inclined in a direction deviating from the connecting portion 12, wherein the inclination angle θ is in a range of 0 ° to 90 °. The embodiment of the utility model provides an in, through establishing the bellied 112 of corrugate to oblique ascending mode to can be under the corrugated condition that adopts the same width, bellied 112 of corrugate area of maximize, thereby better realization improves plate fin 10 structural strength's effect.

Specifically, when considering improving the structural strength of plate fin 10, still should avoid protruding structure on the plate fin too complicated to lead to the processing degree of difficulty big, the easy ponding scheduling problem of fin, the embodiment of the utility model provides an in the embodiment, oblique ascending corrugate is protruding 112, can adopt the mode of constituteing by two ripples, takes into account the consideration of above-mentioned two aspects.

In addition, in an implementation manner, after the plate fin 10 is applied to the micro-channel heat exchanger, in order to position the plate fin 10, in the embodiment of the present invention, flanges are further disposed at the upper and lower sides of the fin body 11 constituting the flat tube mounting opening. Wherein:

as shown in fig. 1 and 2, a first burring 113 perpendicular to the fin body is provided on the lower side of the fin body 11 on the side close to the windward end. In the upper side of the fin main body 11, a second flange 114 perpendicular to the fin main body 11 is disposed on a side close to the leeward end (wherein, in fig. 1, only one first flange 113 and one second flange 114 are respectively shown for keeping the simplicity of the pattern, and it should be noted that other parts not shown may be understood in the same way).

In addition, after being applied to microchannel heat exchanger with flat plate fin 10, the embodiment of the utility model provides a consider when selecting the specification of flat pipe, generally in the current industry based on the consideration that improves microchannel heat exchanger's condenser functional performance, and mostly adopt the flat pipe that thickness is less (for example, the common flat pipe that has thickness to be 1.2mm, 1.3mm or 1.4mm specification at present). The main reason for this is that when the microchannel heat exchanger is used as a condenser, the condenser is insensitive to pressure losses within the flat tubes. Therefore, the flat tube with smaller thickness can improve the heat exchange efficiency. However, when the microchannel heat exchanger is used as an evaporator, the pressure loss is large and the flow resistance of the refrigerant inside the flat tubes is also large, which leads to the reduction of the evaporation temperature, thus reducing the heat exchange efficiency of the system and increasing the frosting speed.

In the present invention, the pressure in the flat tube should be reduced to a more preferred level in consideration of the performance of the evaporator of the microchannel heat exchanger. It is further contemplated that the evaporation temperature may be increased while slowing the rate of frost formation by increasing the thickness of the flat tubes.

Therefore, in the utility model, the height of the flat tube mounting port 13 in fig. 1 can be set to be more than 1.6 mm. Thereby can satisfy the installation demand of thicker flat pipe.

The embodiment of the utility model provides an in, set up more than 1.6mm through the high h with flat tub of installing port 13 to can install the flat pipe that thickness is more than 1.6 mm. And the bigger flat pipe of thickness has the bigger microchannel hole of water conservancy diameter under the condition of the same flat pipe wall thickness, so alright in order to reduce the refrigerant flow resistance, delays the speed of frosting through influencing evaporating temperature.

Additionally, the embodiment of the utility model provides an in consider, when selecting flat tub of specification, along with flat tub of thickness and the increase of the hydraulic diameter in flat intraductal microchannel hole, flat intraductal heat transfer coefficient then can descend along with it, still can lead to the increase of air side flow resistance simultaneously. The utility model provides a thickness of flat pipe does not generally surpass 2mm in the microchannel heat exchanger. In addition, if the flat pipe with two rows of holes is adopted, the thickness of the flat pipe is not more than 4mm (namely, two rows of holes are designed on the flow cross section of the flat pipe, and the thickness of a single row is still not more than 2 mm). Furthermore, the utility model discloses in, can be with the value range restriction of the height h of flat tub of installing port: 1.6 mm-4.0 mm.

In addition, as described in the above embodiments, in order to position the plate fin 10 in the microchannel heat exchanger, the first burring 113 and the second burring 114 are provided on the upper and lower sides of the fin body 11. Wherein the first and

second flanges

113 and 114 can abut against the plate fins at adjacent positions. The utility model discloses in, the value range restriction through the height h with flat tub of installing port is in: 1.6 mm-4.0 mm, and further the width of the first turned-over edge 113 and the second turned-over edge 114 can be increased. The distance between adjacent fins can be larger than 1.4mm and reach a distance of more than 1.6 mm. Under the condition of the same heat exchange area, the smaller the fin spacing is, the faster the frost is formed, so that in the embodiment of the invention, the wider fin spacing can be set by the mode, and the frost forming speed is delayed.

The embodiment of the utility model provides an in, for the position of location plate fin 10 in the microchannel heat exchanger, the upper and lower side department that constitutes flat tub of installing port at fin main part 11 is equipped with the turn-ups, and then can be spacing distance between two adjacent plate fins through this turn-ups. Further, it is considered that the condensed water is accumulated on the plate fin 10 when the microchannel heat exchanger is operated. Under the action of gravity, the comdenstion water can flow down to the seam crossing between fin main part 11 and the flat pipe, consequently the embodiment of the utility model provides an in one side that is close to the windward end with the first turn-ups 113 setting of flat pipe mounting mouth 13 upper surface to the comdenstion water that flows to on the first turn-ups 113 can follow air supply direction flow direction leeward end smoothly, and discharge from leeward end. And the second flanging 114 on the lower surface of the flat pipe mounting port 13 does not accumulate water, so that the second flanging 114 can be formed by the fin material which is left outside the first flanging 113 and is close to the leeward end to realize the limiting function.

Example two:

the utility model also provides a microchannel heat exchanger 30, as shown in FIG. 3, microchannel heat exchanger 30 includes flat pipe 20, still includes the plate fin 10 that above-mentioned embodiment one provided. Wherein, flat pipe 20 is arranged in flat pipe mounting opening 13 of flat plate fin 10.

Specifically, in the microchannel heat exchanger 30, a first turned-up edge 113 perpendicular to the fin main body 11 is provided on one side of the lower side of the fin main body 11, which is close to the windward end. In the upper side of the fin main body 11, a second flange 114 perpendicular to the fin main body is provided on a side close to the leeward end (in fig. 3, only one first flange 113 and one second flange 114 are shown for simplicity of the pattern, and it should be noted that other parts not shown may be understood in the same way).

The widths of the first flange 113 and the second flange 114 are equal to a target width, and the target width is the width between two adjacent plate fins 10 in the microchannel heat exchanger 30. In this way, the first burring 113 and the second burring 114 abut against the two adjacent plate fins 10, and the position of the plate fin 10 is fixed.

Therefore, the utility model provides a microchannel heat exchanger adopts thickness to be the flat pipe more than 1.6 mm.

Additionally, the embodiment of the utility model provides an in consider, when selecting flat tub of specification, along with flat tub of thickness and the increase of the hydraulic diameter in flat intraductal microchannel hole, flat intraductal heat transfer coefficient then can descend along with it, still can lead to the increase of air side flow resistance simultaneously. The utility model provides a thickness of flat pipe does not generally surpass 2mm in the microchannel heat exchanger. In addition, if the flat pipe with two rows of holes is adopted, the thickness of the flat pipe is not more than 4mm (namely, two rows of holes are designed on the flow cross section of the flat pipe, and the thickness of a single row is still not more than 2 mm).

Furthermore, as shown in fig. 4, the utility model discloses in, the value range restriction of the thickness T of flat pipe is in: 1.6 mm-4.0 mm.

The utility model discloses microchannel heat exchanger 30, when realizing the function of evaporimeter, can avoid the comdenstion water to collect and form the water bridge, frosting on microchannel heat exchanger, avoids the wind channel to block up to reduce microchannel heat exchanger's frosting speed, improve defrosting efficiency.

Example three:

an air conditioner comprises a heat exchange system, wherein the micro-channel heat exchanger 30 provided by the second embodiment is arranged in the heat exchange system.

The utility model discloses the air conditioner because refrigeration cycle system's evaporimeter is foretell microchannel heat exchanger 30, consequently, can avoid the comdenstion water to collect and form the water bridge, frosting on the microchannel heat exchanger, avoids the wind channel to block up, and then has strengthened the effect of heating of air conditioner, improves user's use and experiences.

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

1. The utility model provides a plate fin, sets up along vertical direction, plate fin includes connecting portion and a plurality of fin main part that extend along vertical direction, and is wherein a plurality of the fin main part is followed the extending direction equidistance interval of connecting portion sets up on a side of connecting portion, connecting portion and a plurality of the fin main part is located the coplanar, upper and lower adjacent two constitute flat tub of installing port between the side of fin main part, its characterized in that, there are not the split hole, the gap that run through fin main part two sides in the surface of fin main part, and there is not the protruding structure that has the discontinuity in the surface of fin main part except the side.

2. The plate fin as claimed in claim 1, wherein the slits or holes penetrating both surfaces of the fin body comprise: fenestration, bridging, and vortex generating structures.

3. The plate fin as claimed in claim 1, wherein the non-continuous protrusion structure comprises: local flanging, a boss with a tension crack hole and staggered sawteeth.

4. The plate fin as claimed in claim 1, wherein, of the left and right sides of the plate fin, a side close to the fin body is a windward end, and a side close to the connecting portion is a leeward end; in a side of the fin body near the windward end, a portion adjacent to the edge has a lateral corrugated protrusion.

5. The plate fin as claimed in claim 1, wherein, of the left and right sides of the plate fin, a side close to the fin body is a windward end, and a side close to the connecting portion is a leeward end; the connecting part is provided with longitudinal corrugated bulges.

6. The plate fin as claimed in claim 1, wherein in the fin body, in a region between two flat tube fitting openings, there are provided obliquely upward corrugated protrusions.

7. The plate fin as claimed in any one of claims 1 to 6, wherein a first turn-up perpendicular to the fin body is provided on one side of the lower side of the fin body, which is close to the windward end; and a second flanging perpendicular to the fin main body is arranged on one side, close to the leeward end, of the upper side edge of the fin main body.

8. A microchannel heat exchanger comprising flat tubes, characterized by further comprising flat fins provided in any one of claims 1 to 7, wherein the flat tubes are inserted into flat tube mounting ports of the flat fins.

9. The micro-channel heat exchanger as claimed in claim 8, wherein the lower side of the fin body, which is close to the windward end, is provided with a first flanging perpendicular to the fin body; a second flanging vertical to the fin main body is arranged on one side, close to the leeward end, of the upper side edge of the fin main body; the width of the first flanging and the width of the second flanging are equal to a target width, and the target width is the width between two adjacent flat fins in the micro-channel heat exchanger.

10. The microchannel heat exchanger of claim 8, wherein the thickness T of the flat tubes satisfies the condition: t is more than or equal to 1.6mm and less than or equal to 4.0 mm.

11. An air conditioner comprising a heat exchange system, wherein the heat exchange system is provided with a microchannel heat exchanger as set forth in any one of claims 8 to 10.