CN111981583B - Outdoor unit of air conditioner - Google Patents

Abstract

The invention discloses an outdoor unit of an air conditioner, wherein a finned tube heat exchanger arranged in the outdoor unit of the air conditioner comprises a plurality of fins which are arranged in parallel and a heat conduction pipe which penetrates through the fins, and an airflow channel is formed between every two adjacent fins. The fin has round hole turn-ups portion, and the heat pipe wears to locate in the round hole turn-ups portion, and the peripheral ring of round hole turn-ups portion is equipped with the water conservancy diversion annular, and the water conservancy diversion structure is used for the comdenstion water conservancy diversion to the outside of fin of gathering in water conservancy diversion annular department to reduce the gathering of comdenstion water in round hole turn-ups portion department, realize improving finned tube heat exchanger's heat exchange efficiency, the purpose of improving the air conditioner efficiency.

Description

Outdoor unit of air conditioner

Technical Field

The invention relates to the technical field of air conditioners, in particular to an air conditioner outdoor unit, wherein the drainage rate of condensed water on the surface of fins of a heat exchanger is high.

Background

Under the influence of energy efficiency standards, the outdoor heat exchanger in the refrigeration industry continues to use the reinforced fins for a long time. With the gradual increase of energy efficiency and the demand degree of heating performance, in recent years, leading enterprises have successively completed the replacement of reinforcing fins by flat sheets/corrugated sheets. Compared with the reinforced fin, the frosting rate of the flat sheet/corrugated sheet under the low-temperature working condition is obviously reduced, the time for keeping the circulating air volume of the heat exchanger stable is prolonged, and the power consumption of the air conditioner is reduced.

When the surface temperature of the outdoor heat exchanger is lower than the dew point temperature of air, water vapor is condensed into liquid water on the surface of the heat exchanger, which is called as condensate water. According to the traditional view, the drainage speed of the condensed water on the surface of the finned tube heat exchanger is high under the action of gravity, so that the influence of the condensed water on the wind resistance of the heat exchanger can be ignored.

However, through experimental observation and test analysis, the condensate water under the actual air conditioning working condition is found to have important influence on the uniformity of the wind field and the wind quantity of the air conditioning outdoor unit. Further analysis shows that the condensed water of the heat exchanger is generated on the surfaces of the fins except the surfaces of the connecting elbows. Referring to fig. 1, the fin surface includes a base plate 1 and a burring 2 formed on the base plate 1. Wherein, the comdenstion water on round hole turn-ups 2 surface flows to the lower limb of round hole turn-ups 2, and the liquid droplet of hanging causes the windage to increase. The condensed water on the surface of the base plate 1 is converged into a liquid film, one part of the condensed water flows to the surface of the circular hole flanging 2 under the action of the drag force and the gravity of wind, and the other part of the condensed water flows downwards along the base plate 1. The former is undesirable because it results in an extended drainage time.

Disclosure of Invention

In view of this, the present invention provides an air conditioner indoor unit, which improves an outdoor heat exchanger to accelerate a drainage rate of condensed water, reduce adverse effects of the condensed water on wind field uniformity and wind volume of an air conditioner outdoor unit, and improve energy efficiency of the air conditioner.

In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:

in some embodiments of the present application, an air conditioner indoor unit is provided, in which a finned tube heat exchanger is disposed, and the finned tube heat exchanger includes a plurality of fins arranged in parallel and a heat conducting tube penetrating through the plurality of fins, and an airflow channel is formed between two adjacent fins. The fin has round hole turn-ups portion, and the heat pipe wears to locate in the round hole turn-ups portion, and the peripheral ring of round hole turn-ups portion is equipped with the water conservancy diversion annular, and the water conservancy diversion structure is used for the comdenstion water conservancy diversion to the outside of fin of gathering in water conservancy diversion annular department to reduce the gathering of comdenstion water in round hole turn-ups portion department, realize improving finned tube heat exchanger's heat exchange efficiency, the purpose of improving the air conditioner efficiency.

In some embodiments of the present application, the flow guide structure includes:

the inner drainage part is communicated with the two adjacent flow guide ring grooves in the vertical direction and is positioned on the central axis of the two adjacent flow guide ring grooves in the vertical direction;

two go up water conservancy diversion section groove, it locates the top of water conservancy diversion annular, two go up water conservancy diversion section groove for interior drainage portion symmetric distribution, the one end of going up water conservancy diversion section groove with interior drainage portion is connected, the other end to the outside of fin extends, it certainly to go up water conservancy diversion section groove interior drainage portion to the outside of fin is to down-tilting.

In some embodiments of the present application, the flow guide structure further includes:

two lower water conservancy diversion section grooves, it is located the below of water conservancy diversion annular, two lower water conservancy diversion section groove is for interior drainage portion symmetric distribution, the one end in lower water conservancy diversion section groove with interior drainage portion is connected, the other end to the outside of fin extends, lower water conservancy diversion section groove certainly interior drainage portion to the outside tilt up of fin.

In some embodiments of the present application, go up water conservancy diversion section groove with the width in water conservancy diversion section groove down all certainly interior water drainage to the outside of fin reduces gradually, go up water conservancy diversion section groove with water conservancy diversion section groove is the arc wall along its extending direction down.

In some embodiments of this application, it is adjacent along vertical direction go up water conservancy diversion section groove with down water conservancy diversion section groove with be formed with first bellying between the water conservancy diversion annular, the top surface orientation of first bellying the outside slope of fin.

In some embodiments of this application, first bellying has and is close to the first side of water conservancy diversion annulet groove side, the last edge orientation of first side the outside slope of fin, the upper and lower border of first bellying is circular-arcly.

In some embodiments of the present application, the flow guide structure further includes:

and a plurality of second protrusions which are symmetrically distributed with respect to the inner drain part, wherein the height of the second protrusions increases from the inner drain part to the outer side of the fin and then decreases.

In some embodiments of the present application, the top surface of the second protruding portion has a first top surface, a second top surface and a third top surface, the second top surface is parallel to the vertical surface where the fin is located, one side of the first top surface is connected with the internal drainage portion, the other side is connected with the second top surface, one side of the third top surface is connected with the side of the fin, and the other side is connected with the second top surface.

In some embodiments of the present application, a length of the second protrusion in a vertical direction gradually increases from the inner drain portion to an outer side of the fin.

In some embodiments of the present application, the flow guide structure further includes:

the side water discharging part is arranged on two sides of the fin along the air flowing direction, the side water discharging part and the inner water discharging part are located on the same vertical surface, and the outer end of the upper flow guide section groove and the outer end of the lower flow guide section groove are connected with the side water discharging part.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of a prior art finned tube heat exchanger (with heat pipes omitted);

FIG. 2 is a schematic structural view of the finned tube heat exchanger according to the embodiment (with heat conductive pipes omitted);

FIG. 3 is a schematic structural diagram of a fin according to an embodiment;

FIG. 4 is a front view of a fin according to an embodiment;

FIG. 5 is a sectional view taken along line A-A of FIG. 4;

FIG. 6 is a sectional view taken along line B-B of FIG. 4;

FIG. 7 is a partial structural view at a second boss according to an embodiment;

FIG. 8 is a partial structure diagram of a first protrusion and a guide ring groove according to an embodiment;

FIG. 9 is a schematic view of a flow of condensate over fins according to an embodiment;

FIG. 10 is a graph comparing data for residual water quality on prior art fins and fins of the present application.

Reference numerals:

in FIG. 1, 1-base plate, 2-round hole flanging;

in fig. 2 to 10:

100-fins;

10-round hole flanging part;

20-a flow guide ring groove;

30-an inner drainage portion;

40-side drain;

50-an upper flow guide section groove;

60-lower guide section groove;

70-first raised portion, 71-top surface, 72-first side surface;

80-second raised portion, 81-first top surface, 82-second top surface, 83-third top surface.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, 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 only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

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 application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

[ basic operation principle of air conditioner ]

The air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.

The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.

The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

When the surface temperature of the outdoor heat exchanger is lower than the dew point temperature of air, water vapor is condensed into liquid water on the surface of the heat exchanger, which is called as condensate water. The application emphasizes on improving the outdoor heat exchanger so as to accelerate the drainage rate of the condensed water, reduce the adverse effect of the condensed water on the wind field uniformity and the wind volume of the air conditioner outdoor unit and improve the energy efficiency of the air conditioner.

[ Fin tube Heat exchanger ]

The outdoor heat exchanger according to the present application is a fin-tube heat exchanger, and referring to fig. 2, the fin-tube heat exchanger includes a plurality of fins 100 arranged in parallel and a heat transfer tube (not shown) penetrating the plurality of fins 100, and an airflow passage is formed between two adjacent fins 100. The air flows through the airflow channel and exchanges heat with the refrigerant circulating in the heat conducting pipe, so that heat exchange is realized.

[ fins ]

Referring to fig. 3, each fin 100 has a circular hole burring 10, a guide ring groove 20, and a guide structure.

The round hole flanging part 10 is used for installing a heat conduction pipe, and the heat conduction pipe penetrates through the round hole flanging part 10. The condensed water droplets hanging on the round hole flanging part 10 can increase the wind resistance and reduce the heat exchange efficiency of the finned tube heat exchanger.

This application accelerates the comdenstion water drainage rate on the fin 100 through water conservancy diversion annular 20 and water conservancy diversion structure, and is concrete, and water conservancy diversion annular 20 encircles the periphery of locating round hole turn-ups portion 10, and the water conservancy diversion structure is used for the comdenstion water conservancy diversion to the outside of fin 100 of gathering in water conservancy diversion annular 20 department to reduce the gathering of comdenstion water in round hole turn-ups portion 10 department, realize improving finned tube heat exchanger's heat exchange efficiency, the purpose of improving the air conditioner efficiency.

In some embodiments of the present application, in conjunction with fig. 4, the flow directing structure includes an inner drain 30 and two upper flow directing segment troughs 50.

The inner drainage part 30 is communicated with two adjacent guide ring grooves 20 along the vertical direction, and the inner drainage part 30 is positioned on the central axis of the two adjacent guide ring grooves 20 along the vertical direction. The condensed water in the upper diversion ring groove 20 can flow into the lower diversion ring groove 20 through the inner drainage part 30.

Go up water conservancy diversion section groove 50 and all have open-ended groove structure for both ends, two top water conservancy diversion section grooves 50 are located the top of water conservancy diversion annular 20, and water conservancy diversion section groove 50 is for interior drainage portion 30 symmetric distribution on two, and drainage portion 30 in every one end connection of water conservancy diversion section groove 50, the other end extends to the outside of fin 100, goes up water conservancy diversion section groove 50 and extends to the outside of fin 100 from interior drainage portion 30 downwards slope.

Referring to fig. 9, the dotted line in the figure represents water flow, and in the process that the condensed water collected in the diversion ring groove 20 flows downward under the action of gravity, a part of the condensed water flows into the diversion ring groove 20 located below through the inner drainage portion 30, another part of the condensed water flows into the two upper diversion section grooves 50 close to the diversion ring groove 20 below, and the part of the condensed water flows to the left and right sides of the fin 100 through the upper diversion section grooves 50 to be discharged out of the fin 100.

The upper diversion section groove 50 has a diversion effect on the discharge of the condensed water, and accelerates the speed of the condensed water discharging from the fins 100, so that the amount of the condensed water collected in the diversion ring groove 20 is reduced, the collection of the condensed water at the round hole flanging part 10 is also reduced, and the purposes of improving the heat exchange efficiency of the finned tube heat exchanger and improving the energy efficiency of the air conditioner are achieved.

In some embodiments of the present application, in order to facilitate processing and assembling, the fin 100 is designed to be a symmetrical structure, two lower guide section grooves 60 are disposed below the guide ring groove 20, the two lower guide section grooves 60 are symmetrically distributed with respect to the inner drainage portion 30, one end of each lower guide section groove 60 is connected to the inner drainage portion 30, the other end of each lower guide section groove 60 extends to the outer side of the fin 100, and the lower guide section grooves 60 extend from the inner drainage portion 30 to the outer side of the fin 100 in an upward tilting manner.

Two go up water conservancy diversion section grooves 50 and two water conservancy diversion section grooves 60 for water conservancy diversion annular 20 symmetric distribution, on the one hand be convenient for process, on the other hand can avoid influencing drainage effect on the contrary because of fin 100 dress.

In some embodiments of the present application, referring to fig. 4, the widths of the upper and lower inducer grooves 50 and 60 are gradually decreased from the inner drain 30 to the outside of the fin 100. Therefore, the condensed water in the inner drainage part 30 flows into the upper diversion section groove 50 and is discharged towards the outer side of the fin 100, and meanwhile, the condensed water at the edge of the fin 100 is reduced to flow into the upper diversion section groove 50, so that the drainage speed is improved.

In this embodiment, the upper guide section groove 50 and the lower guide section groove 60 are both arc-shaped grooves along the extending direction thereof, which is helpful for reducing the flow resistance of air and condensed water.

In some embodiments of the present application, in the fin structure provided with only the upper guide section groove 50, the first protrusion 70 is formed between the upper guide section groove 50 and the guide ring groove 20, and a top surface 71 of the first protrusion 70 is inclined toward the outer side of the fin 100.

In some embodiments of the present application, referring to fig. 3 and 6, for a fin structure provided with both upper and lower guide section grooves 50 and 60, a first protrusion 70 is formed between the vertically adjacent upper and lower guide section grooves 50 and 60 and the guide ring groove 20, and a top surface 71 of the first protrusion 70 is inclined toward the outside of the fin 100.

In the above two structures of forming the first protruding portion 70, the first protruding portion 70 having the inclined top surface 71 can prevent the condensed water at the edge of the fin 100 from flowing back into the flow guide ring groove 20, which is helpful for increasing the drainage speed.

Referring to fig. 6 and 8, the first protrusion 70 has a first side surface 72 close to the guide ring groove 20, an upper edge of the first side surface 72 is inclined toward the outer side of the fin 100, and upper and lower edges of the first protrusion 70 are arc-shaped to reduce the flow resistance of air and water.

In some embodiments of the present application, referring to fig. 3 and 4, the flow guide structure further includes side water discharge portions 40 disposed at both sides of the fin 100 in the air flowing direction, and both the outer end of the upper flow guide section groove 50 and the outer end of the lower flow guide section groove 60 are connected to the side water discharge portions 40.

The condensed water discharged from the upper diversion section groove 50 flows downwards along the side drainage part 40 and is discharged from the bottom of the fin 100, so that the condensed water is prevented from being directly sprayed obliquely.

The side water discharging part 40 and the inner water discharging part 30 are positioned on the same vertical surface, so that the increase of wind resistance caused by the height difference between the side water discharging part and the inner water discharging part is avoided.

In some embodiments of the present application, with continued reference to fig. 3 and 4, the flow guiding structure further includes a plurality of second protrusions 80, the plurality of second protrusions 80 are symmetrically distributed with respect to the inner drainage portion 30, and the height of the second protrusions 80 increases and then decreases from the inner drainage portion 30 to the outside of the fin 100.

The inner drain portion 30 is defined by two adjacent second protruding portions 80, and one side of each second protruding portion 80 is connected to the inner drain portion 30, and the other side is connected to the side drain portion 40. The second protruding portion 80 has a structure with a high middle and two low ends along the flowing direction of the gas, so that the condensed water on the side of the side drain portion 40 can be prevented from flowing back to the inner drain portion 30, which helps to increase the drainage speed.

In the present embodiment, referring to fig. 5 and 7, the top surface of the second protrusion 80 has a first top surface 81, a second top surface 82, and a third top surface 83, the second top surface 82 is parallel to the vertical surface on which the fin 100 is located, one side of the first top surface 81 is connected to the inner drain portion 30, the other side is connected to the second top surface 82, one side of the third top surface 83 is connected to the side (i.e., the side drain portion 40) of the fin 100, and the other side is connected to the second top surface 82.

In this embodiment, the length of the second protrusion 80 in the vertical direction gradually increases from the inner drain portion 30 to the outer side of the fin 100, and the upper and lower edges of the second protrusion 80 are both arc-shaped to reduce the flow resistance of air and water.

Fig. 10 is a comparison of the quality of the residual condensed water on the fin in the prior art and the fin in the present application, and the lower the quality of the residual condensed water, the better the drainage effect of the fin is. As can be seen from the figure, along with the time, the quality of the condensed water remained on the fins in the application is less than that of the condensed water remained on the fins in the prior art, and the condensed water drainage effect of the fins in the application is better.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the 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 are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (6)

1. An outdoor unit for an air conditioner, comprising:

the finned tube heat exchanger comprises a plurality of fins arranged in parallel and a heat conduction tube penetrating through the fins, wherein an airflow channel is formed between every two adjacent fins;

the fin has:

the heat conduction pipe penetrates through the round hole flanging part;

the flow guide ring groove is annularly arranged on the periphery of the round hole flanging part;

the flow guide structure is used for guiding the condensed water gathered at the flow guide ring groove to the outer side of the fin; the flow guide structure comprises:

the inner drainage part is communicated with the two adjacent flow guide ring grooves in the vertical direction and is positioned on the central axis of the two adjacent flow guide ring grooves in the vertical direction;

the two upper flow guide section grooves are arranged above the flow guide ring groove, are symmetrically distributed relative to the inner drainage part, one end of each upper flow guide section groove is connected with the inner drainage part, the other end of each upper flow guide section groove extends towards the outer side of the fin, and the upper flow guide section grooves are inclined downwards from the inner drainage part to the outer side of the fin;

the two lower flow guide section grooves are arranged below the flow guide ring groove, the two lower flow guide section grooves are symmetrically distributed relative to the inner drainage part, one end of each lower flow guide section groove is connected with the inner drainage part, the other end of each lower flow guide section groove extends towards the outer side of the fin, and the lower flow guide section grooves are inclined upwards from the inner drainage part to the outer side of the fin;

the first bulge is formed between the upper flow guide section groove and the lower flow guide section groove which are adjacent in the vertical direction and the flow guide ring groove, and the top surface of the first bulge inclines towards the outer side of the fin;

and a plurality of second protrusions which are symmetrically distributed with respect to the inner drain part, wherein the height of the second protrusions increases from the inner drain part to the outer side of the fin and then decreases.

2. The outdoor unit of claim 1, wherein,

go up the water conservancy diversion section groove with the width in water conservancy diversion section groove down all certainly interior water drainage portion to the outside of fin reduces gradually, go up the water conservancy diversion section groove with water conservancy diversion section groove is the arc wall down along its extending direction.

3. The outdoor unit of claim 1, wherein,

the first protruding portion is provided with a first side face close to the guide ring groove side, the upper edge of the first side face faces the outer side of the fin in an inclined mode, and the upper edge and the lower edge of the first protruding portion are arc-shaped.

4. The outdoor unit of claim 1, wherein,

the top surface of the second protruding portion is provided with a first top surface, a second top surface and a third top surface, the second top surface is parallel to the vertical surface where the fin is located, one side of the first top surface is connected with the inner drainage portion, the other side of the first top surface is connected with the second top surface, one side of the third top surface is connected with the side edge of the fin, and the other side of the third top surface is connected with the second top surface.

5. The outdoor unit of claim 1, wherein,

the length of the second protruding portion in the vertical direction gradually increases from the inner drainage portion to the outer side of the fin.

6. The outdoor unit of any one of claims 1 to 5, wherein,

the flow guide structure further comprises:

the side water discharging part is arranged on two sides of the fin along the air flowing direction, the side water discharging part and the inner water discharging part are located on the same vertical surface, and the outer end of the upper flow guide section groove and the outer end of the lower flow guide section groove are connected with the side water discharging part.

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