CN107576218B

CN107576218B - Heat exchanger assembly and method of manufacturing the same

Info

Publication number: CN107576218B
Application number: CN201710752970.0A
Authority: CN
Inventors: 雷海涛; 陈伟; 陈乾
Original assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Priority date: 2017-08-28
Filing date: 2017-08-28
Publication date: 2023-06-30
Anticipated expiration: 2037-08-28
Also published as: CN107576218A

Abstract

The invention discloses a heat exchanger component and a manufacturing method thereof, wherein the heat exchanger component comprises a first fin and a heat exchange tube penetrating through the first fin, the edge of the first fin, which is away from the heat exchange tube, is convexly provided with a second fin with a second through hole, and the second fin is used for being arranged on an air duct of an air conditioner. According to the technical scheme, the second fins with the second through holes are convexly arranged at the edges of the first fins away from the heat exchange tubes, and the second fins are arranged on the air duct of the air conditioner, so that condensed water condensed by air flows onto the second fins, and further, the air is humidified when passing through the second fins attached with the condensed water, and the cooling and dehumidifying are realized when passing through the first fins and the heat exchange tubes, so that the constant-humidity refrigeration function of the air is realized, and the effect of improving the sensible heat ratio without loss of electric energy is further realized.

Description

Heat exchanger assembly and method of manufacturing the same

Technical Field

The invention relates to the technical field of air conditioners, in particular to a heat exchanger component and a manufacturing method thereof.

Background

For places with heat load and no wet load, such as a machine room of a data center, the main heat is derived from sensible heat dissipation of high-density electronic components, and the proportion of the wet load is very small. The total refrigerating capacity of the air conditioning system is the sum of the capacity of processing latent heat and sensible heat, the latent heat is generally related to humidity, the sensible heat is related to temperature, the temperature and the humidity of a machine room are controlled, from the viewpoint of energy conservation, in order to reduce energy loss in the humidity adjusting process and improve the sensible heat ratio of the air conditioner, the air conditioner can reduce the temperature under the condition of only reducing the temperature and not dehumidifying, namely not changing the humidity. In the prior art, in order to improve the sensible heat ratio of an air conditioning unit, a mode of improving the air quantity is generally adopted, but the fan power is greatly increased and the electric energy loss is increased by improving the air quantity.

Disclosure of Invention

The invention mainly aims to provide a heat exchanger assembly, which aims to improve the sensible heat ratio of an air conditioning unit without consuming electric energy.

In order to achieve the above purpose, the heat exchanger component provided by the invention is applied to an air conditioner and comprises a first fin and a heat exchange tube penetrating into the first fin, wherein the edge of the first fin is provided with a second fin with a second through hole in a protruding way away from the heat exchange tube, and the second fin is used for being arranged on an air duct of the air conditioner; defining the width of the fins as the width of which the direction is consistent with the air direction of the air conditioner, wherein the width of the fins corresponding to the single heat exchange tube is U, the number of rows of the heat exchange tubes is n, the width of the first fins is A, the width of the second fins is B, and the following conditions are required to be met: a=n×u; u is more than or equal to B and less than or equal to n multiplied by U.

Preferably, the following conditions are satisfied: a=n×u; u is more than or equal to B and less than or equal to 0.5nXU.

Preferably, the second fin is made of hydrophilic material; the first fin is made of a hydrophobic material.

Preferably, the surface of the second fin is provided with a hydrophilic film; the surface of the first fin is provided with a hydrophobic film.

Preferably, the first fin and the second fin are integrally formed.

Preferably, the first fin and the second fin are formed separately.

Preferably, the second fin is disposed at one side of the air inlet direction of the first fin.

Preferably, the second fin is disposed at one side of the first fin in the air outlet direction.

Preferably, the heat exchanger assembly comprises two groups of second fins, wherein one group of second fins is arranged on one side of the air inlet direction of the first fins, and the other group of second fins is arranged on one side of the air outlet direction of the first fins.

The invention also provides a manufacturing method of the heat exchanger component, which is used for manufacturing the heat exchanger component and comprises the following steps:

manufacturing a first fin, and forming a plurality of first through holes on the first fin; manufacturing a second fin, and forming a plurality of second through holes on the second fin; the edge of one side of the first fin, which is away from the first through hole, is assembled with the second fin; after the first through holes are formed, heat exchange tubes are arranged at the first through holes in a penetrating mode; or alternatively, the process may be performed,

manufacturing a first fin and a second fin through integral molding, forming a plurality of first through holes on the first fin, and forming a plurality of second through holes on the second fin; and after the first through holes are formed, heat exchange tubes are arranged at the first through holes in a penetrating way.

Preferably, before the step of forming the first through holes on the first fins and the second through holes on the second fins, the method further comprises:

performing hydrophobic coating on the first fin, and then performing hydrophilic coating on the second fin; or alternatively, the process may be performed,

and hydrophilic coating is carried out on the second fins, and then hydrophobic coating is carried out on the first fins.

According to the technical scheme, the second fins with the second through holes are convexly arranged at the edges of the first fins away from the heat exchange tubes, and the second fins are arranged on the air duct of the air conditioner, so that condensed water condensed by air flows onto the second fins, and further, the air is humidified when passing through the second fins attached with the condensed water, and the cooling and dehumidifying are realized when passing through the first fins and the heat exchange tubes, so that the constant-humidity refrigeration function of the air is realized, and the effect of improving the sensible heat ratio without loss of electric energy is further realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a first embodiment of a heat exchanger assembly according to the present invention;

FIG. 2 is a schematic view of a second embodiment of a heat exchanger assembly according to the present invention;

FIG. 3 is a schematic view of a third embodiment of a heat exchanger assembly according to the present invention;

FIG. 4 is a flow chart of a first embodiment of a method of manufacturing a heat exchanger assembly of the present invention;

fig. 5 is a flow chart of a second embodiment of a method of manufacturing a heat exchanger assembly according to the present invention.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	First fin	110	First through hole
200	Second fin	210	Second through hole
				300	Heat exchange tube

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides a heat exchanger component which is applied to an air conditioner.

In the embodiment of the present invention, as shown in fig. 1, 2 and 3, the heat exchanger assembly includes a first fin 100 and a heat exchange tube 300 penetrating into the first fin 100, wherein a second fin 200 with a second through hole 210 is convexly arranged at the edge of the first fin 100 away from the heat exchange tube 300, and the second fin 200 is arranged on an air duct of an air conditioner; defining the width of the fins as the width in the direction consistent with the air direction of the air conditioner, wherein the width of the fins corresponding to the single heat exchange tube is U, the number of rows of the heat exchange tubes 300 is n, the width of the first fin 100 is A, the width of the second fin 200 is B, and the following conditions are required to be satisfied: a=n×u; u is more than or equal to B and less than or equal to n multiplied by U. The heat exchanger assembly performs heat exchange with ambient air when mainly refrigerant flows through the heat exchange tube 300 in the air conditioner to achieve a conditioning effect on the temperature of the ambient air. The first fins 100 are mainly used for increasing the contact area between the air and the heat exchanger assembly so as to increase the heat exchange area and improve the heat exchange efficiency. When the heat exchanger assembly is used as an evaporator in an air conditioner, the refrigerant flows through the heat exchange tube 300, and because the temperature of the refrigerant is lower, water vapor in the air can be condensed into water on the surfaces of the heat exchange tube 300 and the first fins 100 when the refrigerant is cooled, so that the water vapor content in the air is reduced, and the cooling and dehumidifying functions of the air are achieved.

Because the air supply of the air conditioner is always performed, condensed water can drop from the first fins 100 or be blown out by a fan under the action of the air supply and self gravity, so that the refrigerating capacity of the air conditioner is wasted on latent heat, the edge of the first fins 100 is away from the heat exchange tube 300, the second fins 200 are convexly arranged, and the second fins 200 are arranged on the air duct, so that a large amount of condensed water flows to the second fins 200 to be attached, and when the air passes through the second fins 200 attached with the condensed water, the air is humidified; the air is cooled and dehumidified while passing through the first fin 100 and the heat exchange tube 300. In order to prevent the refrigerating capacity from being wasted on the latent heat, the latent heat is mainly related to the humidity change, so that the second fin 200 attached with the condensed water humidifies the air, and the heat exchange tube 300 and the first fin 100 cool and dehumidify the air, thereby realizing the function of reducing the humidity of the air without changing the temperature and improving the sensible heat ratio of the air conditioning unit.

In the practical application process, the humidification is performed before the dehumidification or the dehumidification is performed before the humidification can be determined according to the actual situation, so long as the small humidity change of the air can be realized. When the air passes through the second fin 200 and then passes through the heat exchange tube 300, the air is humidified and then dehumidified at this time; when the air passes through the heat exchange tube 300 and then the second fin 200, the air is dehumidified and then humidified at this time. The position of the second fin 200 may be determined according to actual needs, so as to ensure that condensed water can flow onto the second fin 200.

In view of the factors such as processing technology and cost, in order to realize the assembly with the heat exchange tube 300, the conventional fins are generally provided with through holes at positions corresponding to the positions where the heat exchange tube 300 is installed on the fins, and in the practical application process, the assembly size between the perforated fins and the heat exchange tube 300 is basically matched, so in this embodiment, the second fins 200 can be directly selected according to the existing fins with the second through holes 210 on the market, and assembled with the first fins 100 provided with the heat exchange tube 300, or when the first fins 100 are selected, the fins with the first through holes 110 with the size larger than the first through holes 300 are selected, so that the second fins 200 with the second through holes 210 are formed in comparison with the fins with the heat exchange tube 300, and the staff only need to select according to the practical situation, without reprocessing or shaping the second fins 200, thereby realizing the functions of reducing the cost and simplifying the processing technology.

In practical applications, the fin width is related to the number of rows and the tube diameter of the heat exchange tube 300. When the fin width corresponding to each row of heat exchange tubes 300 is set to be U, when n rows of heat exchange tubes 300 are inserted into the first fin 100, the width a=n×u of the first fin 100, and the width B of the second fin 200 satisfies that u.ltoreq.b.ltoreq.n×u. In view of cost and air conditioner model, it may be preferable that the width B of the second fin 200 satisfies u.ltoreq.b.ltoreq.0.5 n×u when the width a=n×u of the first fin 100. The specification of the tube diameter of the heat exchange tube 300 corresponding to the fin width is described in detail by way of example:

if the pipe diameter of the heat exchange pipe is 10mm, when the fin width U corresponding to each row of heat exchange pipes is 25 mm: if 2 rows of heat exchange tubes are arranged in the first fin 100 in a penetrating manner, the width a=2×25=50 mm of the first fin 100, the width B of the second fin 200 is 25mm or less and B or less than 50mm, and the range interval is calculated according to the factors of U or less and B or less than 0.5n×u in consideration of the cost, the air conditioner model and the like: b is more than or equal to 25mm and less than or equal to 25mm, namely preferably B is 25mm; if 3 rows of heat exchange tubes are perforated in the first fin 100, the width a=3×25=75 mm of the first fin 100, the range interval of the width B of the second fin 200 is 25 mm-75 mm, and considering the cost and the air conditioner model, the preferred range interval of B is calculated according to U-0.5n×u, where U-0 is equal to or less than B: b is more than or equal to 25mm and less than or equal to 37.5mm. And the like, and the selection of the row number, the pipe diameter and the like of the heat exchange pipes is determined according to the practical conditions of the type and the model of the air conditioner to which the heat exchange pipes are suitable.

If the pipe diameter of the heat exchange pipe is 8mm, when the fin width U corresponding to each row of heat exchange pipes is 20 mm: if 2 rows of heat exchange tubes are arranged in the first fin 100 in a penetrating manner, the width a=2×20=40 mm of the first fin 100, the width B of the second fin 200 is 20mm or less and B or less than 40mm, and in consideration of the cost, the air conditioner model and other factors, according to the U or less and B or less than 0.5n×u, the following is calculated: the range interval of B is preferably 20mm less than or equal to B less than or equal to 20mm, namely preferably B is 20mm; if 3 rows of heat exchange tubes are perforated in the first fin 100, the width a=3×20=60 mm of the first fin 100, the range interval of the width B of the second fin 200 is 20 mm-60 mm, and considering the cost and the air conditioner model, the preferred range interval of B is calculated according to U-0.5n×u, where U-0 is equal to or less than B: b is more than or equal to 20mm and less than or equal to 30mm. And the like, and the selection of the row number, the pipe diameter and the like of the heat exchange pipes is determined according to the practical conditions of the type and the model of the air conditioner to which the heat exchange pipes are suitable.

Of course, when the ambient temperature is high, condensed water may not be generated, and the heat exchange area of the air and the heat exchanger assembly is increased in a phase change manner due to the addition of the second fins 200, so that the evaporation effect is further improved, and the effect of improving the sensible heat ratio is achieved.

According to the technical scheme, the second fins 200 with the second through holes 210 are arranged on the edges of the first fins 100 in a protruding mode away from the heat exchange tubes 300, and the second fins 200 are arranged on an air duct of an air conditioner, so that condensed water condensed by air flows onto the second fins 200, air is humidified when passing through the second fins 200 attached with the condensed water, the first fins 100 and the heat exchange tubes 300 are cooled and dehumidified, the constant-humidity refrigeration function of the air is achieved, and the effect of improving the sensible heat ratio without loss of electric energy is achieved.

Further, referring to fig. 1, 2 and 3, in order to make the effect of the condensed water adhering to the second fin 200 better, the second fin 200 has hydrophilicity and the first fin has hydrophobicity. Optionally, the second fin 200 is treated with hydrophilic treatment, and the first fin 100 is treated with hydrophobic treatment. By performing the hydrophilic treatment on the second fin 200, the condensed water on the first fin 100 and the heat exchange tube 300 can flow to the second fin 200 better without causing waste of the condensed water being dropped or blown away. In the practical application process, the hydrophilic treatment may be to provide a hydrophilic film on the surface of the second fin 200 by coating, adhering, spraying, or the like, or may directly manufacture the second fin 200 by selecting hydrophilic materials, such as chromium, aluminum, zinc, or the like.

Similarly, the first fin 100 may be subjected to a hydrophobic treatment, so that condensed water is not easily attached to the first fin 100, and the condensed water can flow onto the second fin 200 as much as possible, so as to realize the function of humidifying air by the second fin 200. In the practical application process, the hydrophobic treatment may be to provide a hydrophobic film on the surface of the first fin 100 by coating, adhering, spraying, or the like, or may directly manufacture the first fin 100 by selecting a hydrophobic material.

Further, with continued reference to fig. 1, 2 and 3, the first fin 100 is integrally formed with the second fin 200. In consideration of factors such as manufacturing process and cost, when the first fin 100 of the heat exchanger assembly is selected, the model of the first fin 100 may be directly selected to be large or the size of the first fin 100 may be selected to be large, so that the first fin 100 on which the heat exchange tube 300 is mounted is sufficiently large, i.e., the first fin 100 and the second fin 200 are integrally formed. Of course, in the practical application process, the first fin 100 and the second fin 200 may be formed separately, that is, the second fin 200 is selected separately and then mounted on the first fin 100 according to the practical requirement.

Further, the position of the second fin 200 may be determined according to the volume of the actual air conditioner.

Alternatively, referring to fig. 1, the second fin 200 is disposed at one side of the air intake direction of the first fin 100. At the initial stage of the operation of the air conditioner, a large amount of condensed water gradually generated by the cooling and dehumidifying of the first fin 100 and the heat exchange tube 300 flows onto the second fin 200, and air firstly passes through the second fin 200 along with the air supply direction and contacts with the condensed water attached to the second fin 200, which is equivalent to humidifying the air, and then the cooling and dehumidifying are realized through the heat exchange of the first fin 100 and the heat exchange tube 300, namely, the air is firstly humidified and then dehumidified in the embodiment, so that the aim of constant-humidity cooling is fulfilled, and the sensible heat ratio of the air conditioner is further improved.

Alternatively, referring to fig. 2, the second fin 200 is disposed at one side of the first fin 100 in the air outlet direction. The air is firstly subjected to refrigeration and dehumidification through the first fins 100 and the heat exchange tubes 300 along with the air supply direction, and then is subjected to humidification through the second fins 200, namely, the air is dehumidified and then humidified, so that the aim of constant humidity refrigeration is fulfilled, and the sensible heat ratio of the air conditioner is improved.

Alternatively, referring to fig. 3, the second fins 200 may be disposed on both sides of the first fin 100, that is, the heat exchanger assembly includes two sets of second fins 200, wherein one set of second fins 200 is disposed on one side of the first fin 100 in the air inlet direction and the other set of second fins 200 is disposed on one side of the first fin 100 in the air outlet direction. This is applicable to a case where the trend of the flow direction of the condensed water is unclear. The condensed water can flow onto the second fin 200 no matter the air supply amount of the air conditioner is large or small, so that the air can be humidified, thereby realizing the constant humidity refrigeration function of the air conditioner and improving the sensible heat ratio of the air conditioner.

In addition, the invention also provides a manufacturing method of the heat exchanger assembly, referring to fig. 4 and 5, comprising the following steps:

when the first fin 100 and the second fin 200 are molded separately, refer to steps S10 to S30:

step S10, manufacturing a first fin 100, and forming a plurality of first through holes 110 on the first fin 100;

specifically, when the heat exchanger assembly is installed in an air conditioner, the direction in which the plurality of first through holes 110 penetrate the first fins 110 is perpendicular to the air supply direction of the air conditioner, so that air can smoothly pass through the first fins 100.

Step S20, manufacturing a second fin 200, and forming a plurality of second through holes 210 on the second fin 200;

specifically, when the heat exchanger assembly is installed in the air conditioner, the direction in which the plurality of second through holes 210 penetrate the second fin 200 is perpendicular to the air supply direction of the air conditioner.

In step S30, an edge of the first fin 100 facing away from the first through hole 110 is assembled with the second fin 200.

In particular, the assembly between the first fin 100 and the second fin 200 may be achieved by welding or bonding.

In step S40, the heat exchange tubes 300 are inserted through the first through holes 110.

Specifically, step S40 follows step S10, and may be performed before or after step S20/step S30. The heat exchange tube 300 is penetrated in the plurality of first through holes 110, so that air circulating in the air conditioner can be fully contacted with the heat exchange tube 300, thereby realizing a larger heat exchange effect.

The above embodiment is formed by separating the first fin 100 from the second fin 200 and then assembling the same together to form the heat exchanger assembly of the present invention.

When the first fin 100 and the second fin 200 are integrally formed, refer to step S50:

in step S50, the first fin 100 and the second fin 200 are manufactured by integral molding, a plurality of first through holes 110 are formed in the first fin 100, a plurality of second through holes 210 are formed in the second fin 200, and the heat exchange tube 300 is inserted into the plurality of first through holes 110.

Specifically, the first fin 100 and the second fin 200 are integrally formed, and when the fins are selected, the fins having sufficient dimensions including the first fin 100 and the second fin 200 are directly selected, and then the first fin 100 and the second fin 200 are perforated, and then the heat exchange tube 300 is mounted at the first through hole 110, thereby forming the heat exchanger assembly of the present invention.

Further, whether integrally molded or separately molded, before forming the through-holes 110 in the first fin 100, it further includes:

step S60: the first fin 100 is subjected to hydrophobic coating, and then the second fin 200 is subjected to hydrophilic coating.

Or alternatively, the process may be performed,

step S70: the second fin 200 is subjected to hydrophilic coating, and then the first fin 100 is subjected to hydrophobic coating.

Specifically, the sequence of the hydrophobic coating operation on the first fin 100 and the hydrophilic coating operation on the second fin 200 may be adjusted according to the actual situation, as long as it is before the first fin 100 passes through the hole 110. Of course, in practical applications, if the first fin 100 and the second fin 200 are integrally formed, a whole fin may be first integrally subjected to hydrophobic coating or hydrophilic coating, and then the hydrophilic coating is performed at a position corresponding to the second fin 200 to cover the existing hydrophobic film, or the hydrophobic coating is performed at a position corresponding to the first fin 100 to cover the existing hydrophilic film. It is also possible to initially divide the area of the first fin 100 and the second fin 200 on the whole fin and then respectively plate the corresponding films.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. The heat exchanger assembly is applied to an air conditioner and is characterized by comprising a first fin and a heat exchange tube penetrating into the first fin, wherein the edge of the first fin is away from the heat exchange tube and is convexly provided with a second fin with a second through hole, and the second fin is arranged on an air duct of the air conditioner; defining the width of the fins as the width of which the direction is consistent with the air direction of the air conditioner, wherein the width of the fins corresponding to the single heat exchange tube is U, the number of rows of the heat exchange tubes is n, the width of the first fins is A, the width of the second fins is B, and the following conditions are required to be met: a=n×u; u is more than or equal to B and less than or equal to 0.5nXU; the second fin has hydrophilicity, and the first fin has hydrophobicity.

2. The heat exchanger assembly of claim 1, wherein the second fin is a hydrophilic material; the first fin is made of a hydrophobic material.

3. The heat exchanger assembly of claim 1, wherein a surface of the second fin is provided with a hydrophilic film; the surface of the first fin is provided with a hydrophobic film.

4. A heat exchanger assembly according to any one of claims 1 to 3, wherein the first fin is integrally formed with the second fin; or the first fin and the second fin are formed in a split mode.

5. A heat exchanger assembly according to any one of claims 1 to 3, wherein the second fin is disposed on one side of the first fin in the air intake direction.

6. A heat exchanger assembly according to any one of claims 1 to 3, wherein the second fin is provided on one side of the first fin in the air outlet direction.

7. A heat exchanger assembly according to any one of claims 1 to 3, wherein the heat exchanger assembly comprises two sets of second fins, one set of second fins being arranged on one side of the first fins in the air inlet direction and the other set being arranged on one side of the first fins in the air outlet direction.

8. A method of manufacturing a heat exchanger assembly, characterized by the steps of:

and manufacturing the first fins and the second fins by integral molding, forming a plurality of first through holes on the first fins, forming a plurality of second through holes on the second fins, and penetrating the heat exchange tubes at the first through holes.

9. The method of manufacturing a heat exchanger assembly according to claim 8, further comprising, prior to the step of forming a plurality of first through holes in the first fins and a plurality of second through holes in the second fins: