CN108895861B

CN108895861B - Heat exchanger and air conditioner

Info

Publication number: CN108895861B
Application number: CN201810374346.6A
Authority: CN
Inventors: 张振富; 乔光宝; 朱百发; 王若峰
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Haier Smart Home Co Ltd
Priority date: 2018-04-24
Filing date: 2018-04-24
Publication date: 2020-08-25
Anticipated expiration: 2038-04-24
Also published as: CN108895861A; WO2019205622A1

Abstract

The invention discloses a heat exchanger and an air conditioner, and belongs to the technical field of air conditioners. This heat exchanger includes: one or more slotted fins, each slotted fin is provided with one or more through holes, the through holes are used for passing through a heat exchange tube, and adjacent through holes are communicated through slots, so that air can circulate between the slots of the adjacent slotted fins; one or more plate fins, each of which is provided with one or more through holes for passing through a heat exchange tube, each of which is arranged between adjacent one or more of the slotted fins, so that the slotted fin or fins between two adjacent plate fins form an air flow area. According to the heat exchanger, the flat plate fins are inserted into the slit fins, so that the flow path of air is optimized, the heat exchange effect of the heat exchanger is improved, and the heat exchange efficiency is improved.

Description

Heat exchanger and air conditioner

Technical Field

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

Background

The heat exchanger is a key part for heat exchange in the air conditioner, and the heat exchange efficiency of the heat exchanger is one of important parameters influencing the running performance of the air conditioner. An existing heat exchanger mostly adopts an equidistant slotted fin structure, as shown in figure 1. The heat exchanger of this kind of structure, heat exchanger intermediate position correspond the motor for the air is from the intermediate position to both sides diffusion, and in the both sides of heat exchanger, the air forms lateral flow more easily, makes the windage of heat exchanger both sides increase, and the amount of wind reduces, influences the heat transfer effect of heat exchanger, makes the whole heat exchange efficiency of heat exchanger reduce. In the prior art, the air quantity is increased by increasing the running power of a motor so as to improve the heat exchange efficiency of the heat exchanger and increase the heat exchange quantity, and the mode has high energy consumption and can not change the air flowing direction.

Disclosure of Invention

The embodiment of the invention provides a heat exchanger and an air conditioner. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

According to a first aspect of embodiments of the present invention, there is provided a heat exchanger comprising: one or more slotted fins, each slotted fin is provided with one or more through holes, the through holes are used for passing through a heat exchange tube, and adjacent through holes are communicated through slots, so that air can circulate between the slots of the adjacent slotted fins; one or more plate fins, each of which is provided with one or more through holes for passing through a heat exchange tube, each of which is arranged between adjacent one or more of the slotted fins, so that the slotted fin or fins between two adjacent plate fins form an air flow area.

In some alternative embodiments, the spacing between adjacent ones of the plate fins is the same, and the number of the slotted fins between adjacent ones of the plate fins is the same.

Preferably, the distance between the adjacent flat plate fins is the same, and the number of the slotted fins between the adjacent flat plate fins is gradually reduced from the middle to two sides of the heat exchanger.

Preferably, a slit punching sheet is reserved between the through holes of one or more flat plate fins, the slit punching sheet is formed after being removed, and the slit is communicated with the adjacent through holes.

Preferably, the density of the slotted fins decreases stepwise from the air outlet side of the heat exchanger to the air inlet side of the heat exchanger.

Preferably, the distance between the adjacent slotted fins is gradually increased from the middle to both sides of the heat exchanger.

Preferably, the distance between the adjacent flat plate fins is gradually reduced from the middle to both sides of the heat exchanger.

Preferably, the density of the slotted fins decreases stepwise according to two gradients or more from the air outlet side of the heat exchanger to the air inlet side of the heat exchanger.

Preferably, one or more slotted fins and/or one or more flat plate fins of the heat exchanger are movably arranged, and the distance between the slotted fins and the flat plate fins is adjustable.

According to a first aspect of embodiments of the present invention, there is provided an air conditioner including any one of the heat exchangers described above.

According to the heat exchanger provided by the embodiment of the invention, the flat plate fins are inserted into the slit fins, so that the flow path of air is optimized, the heat exchange effect of the heat exchanger is improved, and the heat exchange efficiency is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic diagram of a prior art heat exchanger configuration;

FIG. 2 is a schematic diagram of a heat exchanger according to an exemplary embodiment;

FIG. 3 is a schematic front view of a heat exchanger plate fin according to an exemplary embodiment;

FIG. 4 is a schematic front view of a heat exchanger plate fin according to another exemplary embodiment;

fig. 5 is a schematic diagram of a heat exchanger according to another exemplary embodiment.

Reference numerals

In the figure: 1. a heat exchanger; 11. a slotted fin; 12. a plate fin; 13. punching the crack into a sheet; 2. an electric motor.

Detailed Description

The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. As for the methods, products and the like disclosed by the embodiments, the description is simple because the methods correspond to the method parts disclosed by the embodiments, and the related parts can be referred to the method parts for description.

Fig. 1 is a schematic diagram of a heat exchanger according to the prior art. As shown in fig. 1, the heat exchanger 1 in the prior art includes one or more slit fins 11 arranged at equal intervals, the motor 2 rotates to drive the fan to rotate, so that air enters the heat exchanger 1 along the direction indicated by the arrow in the figure, the heat exchange tube penetrates into the through holes of the slit fins in the direction perpendicular to the slit fins of the heat exchanger 1, the slits on the slit fins 11 are communicated with the through holes, so that the air/wind can transversely flow between the slit fins 11, as shown in fig. 1, the transverse flow of the air/wind is enhanced on two sides of the heat exchanger 1, so that the contact area between the air and the fins of the heat exchanger is reduced, and meanwhile, the transverse flow on two sides increases the wind resistance on two sides, reduces the wind speed, reduces the wind quantity, reduces the heat exchange quantity, and affects. In view of the above technical problems, the present invention provides an exemplary heat exchanger structure that optimizes an air flow path and improves heat exchange efficiency based on the existing heat exchanger.

FIG. 2 is a schematic diagram of a heat exchanger according to one embodiment of the present invention, shown in accordance with an exemplary embodiment. As shown in fig. 2, a heat exchanger 1 according to an embodiment of the present invention includes: one or more slotted fins 11, each of which is provided with one or more through holes for passing through a heat exchange tube, adjacent through holes being communicated with each other through slots, so that air can flow between the slots of the adjacent slotted fins 11; one or more plate fins 12 each having one or more through holes for passing a heat exchange tube therethrough, each of the plate fins being disposed between adjacent one or more of the slotted fins 11, so that the one or more slotted fins 11 between two adjacent plate fins 12 form an air flow-through region.

In the above scheme, one or more slit fins 11 are arranged between the plate fins 12, for example, the slit fins 11 and the plate fins 12 can be installed in parallel, and the heat exchange tubes are installed in the through holes of the slit fins 11 and the plate fins 12. Fig. 3 is a schematic structural view of a plate fin of a heat exchanger according to an embodiment of the present invention, shown according to an exemplary embodiment. The plate fins 12 of the heat exchanger shown in fig. 3 are provided with through holes corresponding to the slotted fins, and the difference compared with the slotted fins is that no slot is formed between the adjacent through holes of the plate fins 12, and air can only circulate between each slotted fin 11 between two plate fins 12, so that an independent air circulation area is formed between the two adjacent plate fins 11, and one or more air circulation areas formed by two plate fins are formed in the direction perpendicular to the air flowing direction of the heat exchanger, and air flows in each air circulation area. Compared with the air flow direction of the heat exchanger in the prior art shown in the figure 1, for the heat exchanger which is formed by the existing slit fins, the heat exchanger in the embodiment of the invention can effectively improve the air quantity loss at two sides caused by the transverse flow of air at two sides of the heat exchanger, optimize the air circulation path, improve the heat exchange effect of the heat exchanger and improve the heat exchange efficiency.

The mounting structure of the slotted fin and the flat plate fin of the heat exchanger can be various. As an example, the distance between the adjacent flat plate fins is the same, and the number of the slotted fins between the adjacent flat plate fins is the same.

In the scheme, compared with the existing equidistant slotted fin heat exchanger, the heat exchanger provided by the embodiment of the invention uses the flat plate fins to replace one or more slotted fins on the basis of the structure of the existing equidistant slotted fin heat exchanger, so that one or more identical air circulation areas are formed, and the air is uniformly contacted with the fins of each air circulation area. The transverse flow of the air quantity on the two sides is improved, especially the air flow paths on the two sides of the heat exchanger are optimized, the integral heat exchange effect of the heat exchanger is improved, and the heat exchange efficiency is improved.

As another example, the distance between the adjacent plate fins is the same, and the number of the slotted fins between the adjacent plate fins is gradually reduced from the middle to both sides of the heat exchanger.

In the above scheme, the number of the crack fins between the two adjacent flat plate fins from the middle to the two sides of the heat exchanger is gradually reduced, and the wind resistance of air flow is reduced, so that the air quantity/air quantity of the two sides is increased, the heat exchange efficiency of the two sides is improved, the heat exchange efficiency of the heat exchanger is integrally improved, and the heat exchange effect is improved.

Fig. 4 is a schematic structural view of a plate fin of a heat exchanger according to an embodiment of the present invention, shown according to another exemplary embodiment. In the heat exchanger according to an embodiment of the present invention, as shown in fig. 4, a slit punch 13 is reserved between the through holes of one or more of the flat plate fins, the slit punch 13 is formed after being removed, and the slit communicates with the adjacent through holes.

In the above scheme, the fracture punched sheet 13 is formed by a punching process, is not completely punched out in the punching process, and can apply an external force to the fracture punched sheet 13 along the punching cut to remove the fracture punched sheet 13 to form a flat plate fin with a part of through holes communicated with each other, or remove the fracture punched sheets 13 between all the through holes of the flat plate fin 12 to form a structure the same as that of the fracture fin 11.

In the above example, the slit punched sheets are reserved between the through holes of the plate fins, and after the slit punched sheets are removed, the structure identical to that of the slit fins is formed.

FIG. 5 is a schematic diagram of a heat exchanger according to one embodiment of the present invention, shown in accordance with an exemplary embodiment. As shown in fig. 5, in the heat exchanger according to an embodiment of the present invention, the density of the fin 11 decreases stepwise from the air outlet side of the heat exchanger to the air inlet side of the heat exchanger.

Among the above-mentioned scheme, easily gather more condensate water in the air inlet side of heat exchanger, the condensate film leads to air inlet side fin interval to reduce, and the amount of wind descends, and the amount of wind of air-out side will obviously reduce, influences the heat transfer effect of heat exchanger. This embodiment reduces from the air-out side to the air inlet side gradually through the fin that sets up the heat exchanger, and the interval crescent reduces the condensate water formation water bridge that the air inlet side caused the negative effects that the fin interval reduces for air/wind reduces at the windage of air inlet side, gets into between the fin of heat exchanger smoothly, and flows out smoothly from the air-out side, improves the circulation of air ability of heat exchanger, improves the heat transfer effect, improves heat exchange efficiency.

In the above solution, the distance between the adjacent slotted fins gradually increases from the middle to both sides of the heat exchanger (not shown in the figure).

The arrangement mode of the crack fins in the above example is favorable for reducing the wind resistance on two sides of the heat exchanger and increasing the air quantity on two sides of the heat exchanger, so that the heat exchange quantity on two sides of the heat exchanger is increased, the heat exchange efficiency is improved, and the heat exchange effect is improved.

As another example, the distance between the adjacent plate fins is gradually decreased from the middle to both sides of the heat exchanger (not shown in the drawings).

The arrangement mode of the plate fins of the above example is that the air/wind is drawn close from the two sides of the heat exchanger to the middle position, so that the transverse flow of the air/wind is smaller at the middle position of the heat exchanger, the transverse flow of the air/wind is more obvious at the two sides of the heat exchanger, and smaller plate fin intervals are arranged at the two sides, so that the blocking effect of the transverse flow of the air/wind between the fins is more obvious, the wind resistance is reduced, the wind quantity is increased, the heat exchange effect is further improved, and the heat exchange effect is improved.

In the above scheme, the density of the slit fins decreases stepwise from the air outlet side of the heat exchanger to the air inlet side of the heat exchanger according to two gradients or more.

By way of example, the density of the slotted fins is arranged to decrease stepwise in three gradients, with a fin spacing of D1 on the air inlet side, D3 on the air outlet side, and D2 in the region between the air inlet side and the air outlet side of the heat exchanger, wherein D1 > D2 > D3.

As a further example, the relationship of D1, D2, and D3 is: 3D 1-4D 2-6D 3.

In the above scheme, one or more of the slotted fins and/or one or more of the plate fins of the heat exchanger are movably mounted, and the distance between the slotted fins and/or the plate fins is adjustable.

In the heat exchanger of the exemplary embodiment, each slit fin and/or the flat plate fin is not fixedly installed, and can transversely move along the through hole, so that the distance between the fins can be adjusted, the heat exchanger is suitable for air conditioners in different installation environments and different performance parameters, and the universality of the heat exchanger is improved.

Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention. It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments disclosed herein, it should be understood that the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

Claims

1. A heat exchanger, comprising:

the heat exchange tube comprises a plurality of slit fins, wherein one or more through holes are formed in each slit fin, the through holes are used for passing through the heat exchange tube, and the adjacent through holes are communicated through slits, so that air can flow between the slits of the adjacent slit fins;

each flat plate fin is provided with one or more through holes for passing through a heat exchange tube, and each flat plate fin is arranged between a plurality of adjacent slotted fins, so that the slotted fins between two adjacent flat plate fins form an air circulation area.

2. The heat exchanger as claimed in claim 1, wherein the spacing between adjacent ones of said plate fins is the same, and the number of said slitted fins between adjacent ones of said plate fins is the same.

3. The heat exchanger as claimed in claim 1, wherein the spacing between adjacent ones of said plate fins is the same, and the number of said slitted fins between adjacent ones of said plate fins decreases from the middle to both sides of said heat exchanger.

4. The heat exchanger as claimed in claim 1, 2 or 3, wherein slit punched pieces are reserved between the through holes of a plurality of the flat plate fins, the slit punched pieces are removed to form the slits, and the slits communicate with the adjacent through holes.

5. The heat exchanger of claim 1, 2 or 3, wherein the slotted fins decrease in density in a stepwise manner from an air outlet side of the heat exchanger to an air inlet side of the heat exchanger.

6. The heat exchanger of claim 1, wherein a distance between adjacent ones of the slitted fins increases gradually from a middle to both sides of the heat exchanger.

7. The heat exchanger according to claim 1 or 6, wherein the distance between the adjacent plate fins is gradually decreased from the middle to both sides of the heat exchanger.

8. The heat exchanger of claim 5, wherein the density of said slotted fins decreases stepwise in greater than or equal to two gradients from the air outlet side of said heat exchanger to the air inlet side of said heat exchanger.

9. The heat exchanger of claim 1, wherein a plurality of said slotted fins and/or a plurality of said plate fins of said heat exchanger are movably mounted with adjustable spacing.

10. An air conditioner characterized by comprising the heat exchanger of claim 1 or 2 or 3 or 8 or 9.