TW201908688A - Heat exchanger and air conditioner using same - Google Patents

Abstract

Provided is a heat exchanger (6) provided with a plurality of fins (14) formed by laminations. Among the plurality of fins (14), a cut surface (14b) at the windward side of at least one of the fins is coated with an anti-smudge material (16). Furthermore, the anti-smudge material is a hydrophilic material. The anti-smudge material is coated on the proximity of the cut surface at the windward side of the fin, while the surface of the fin beyond the proximity of the cut surface remains to be provided with pre-coated material. Each of the fins has a plurality of cut standing pieces. Among the plurality of cut standing pieces, a windward side end surface of the cut standing piece that is closest to the windward side is implemented with the coating of the anti-smudge material.

Description

Heat exchanger and air conditioner using same

The present invention relates to a heat exchanger for antifouling treatment, and an air conditioner using the same.

Generally used in heat exchangers. For example, the heat exchanger of an air conditioner converts air sent from a fan into cold or warm air. At that time, the dust contained in the air will adhere to the heat exchanger. Due to the adhesion of the dust, the heat exchanger often suffers from a decrease in heat exchange efficiency or an unpleasant odor. Therefore, an antifouling coating is applied to the fins of the heat exchanger (for example, refer to Patent Document 1 (Japanese Patent Application Laid-Open No. 2008-145064)). FIG. 8 is a diagram illustrating coating of the heat exchanger described in Patent Document 1. FIG.涂布 Apply an antifouling material 102 to the fins 101 of the heat exchanger. As a result, dust in the air is less likely to adhere to the fins 101. Therefore, it is possible to reduce dust adhesion, increase ventilation resistance, decrease heat exchange efficiency, or generate a bad smell. However, the antifouling coating of the fins 101 is performed in advance in the state of the material. Therefore, when this was used as a fin and die-cutting was carried out under pressure, the pressed surface was still in the state of the substrate. In addition, since the cut surface is directly opposite to the wind from the blower, dust may adhere to the cut surface. Therefore, if it is used for many years, dust may accumulate on the cutting surface and become blocked. As a result, the heat exchange efficiency is reduced in proportion to the use time. In this way, although the conventional antifouling-coated fins reduce the effects of heat exchange efficiency and the like caused by the dust adhesion on the fin surface itself, they cannot sufficiently reduce the heat caused by dust adhesion on the low-pressure cut surface Reduced exchange efficiency. Therefore, when used for a long period of time, dust accumulates on the cut surface of the fins, in other words, the end face of the heat exchanger facing the wind.

The present invention has been made in view of such a problem, and provides a heat exchanger and an air conditioner using the heat exchanger which can prevent the adhesion of dust on the cutting surface and maintain good heat exchange performance for a long period of time. (2) The heat exchanger of the present invention includes a plurality of laminated fins. Among the plurality of fins, an antifouling material is applied to a cut surface on the windward side of at least one fin. The air conditioner of the present invention includes: a main body; a fan installed in the main body; and a heat exchanger in the main body that converts wind from the fan into at least one of cold air and warm air. As a result, dust adhesion to the cut surface of the fin can be greatly reduced. Therefore, even if it is used for a long period of time, clogging caused by dust adhesion and the like, that is, an increase in ventilation resistance can be suppressed. Therefore, even if used for many years, a high heat exchange efficiency can be maintained. According to the present invention, it is possible to provide a heat exchanger that can exhibit high heat exchange efficiency for a long time, and a high-performance air conditioner using the same.

(An example of the aspect that can be adopted in the present invention) The first aspect is a heat exchanger having a plurality of laminated fins, and among the plurality of fins, at least one of the fins is coated with a cutting surface on the windward side. Antifouling material. As a result, it is possible to greatly reduce the situation where dust adheres to the cut surface of the fins, and even if it is used for a long period of time, it is still possible to suppress clogging caused by dust adhesion, that is, an increase in ventilation resistance. Therefore, even if used for many years, high heat exchange efficiency can be maintained. (2) In the second aspect, in the first aspect, the antifouling material may be a hydrophilic material. Therefore, even if the moisture in the heat-exchanged air is condensed on the cutting surface of the fin, the condensed water can be smoothly discharged to the downwind side by the hydrophilic action. In addition, even if oil droplets and the like are mixed into the air, the oil droplets can still roll on the surface of the water film formed by the hydrophilic action and be discharged to the downwind side. Therefore, dust in the air is not deposited on the cut surface of the fins and is discharged to the downwind side. Therefore, the blocking prevention effect can be made more reliable, and a high heat exchange efficiency can be maintained for a long time. In the third aspect, in the first aspect or the second aspect, the antifouling material may be applied only in the vicinity of the cut surface of the fin facing the windward side, and other than in the vicinity of the cut surface. The face of the fins is still pre-coated. Thereby, the entire fin after pressing is immersed in the antifouling material liquid, which can prevent a decrease in heat exchange efficiency when the cut surface is antifouled, in other words, the antifouling is applied in the material state. The fin surface becomes a double coating, which reduces the heat exchange efficiency and can exert higher heat exchange efficiency. In short, it is possible to prevent the heat exchange efficiency improvement effect caused by the antifouling coating on the windward cut surface, because the heat exchange efficiency decreases due to the double antifouling coating on the fin surface other than the cut surface facing the windward side. Effect and reduce the situation. Therefore, heat exchange efficiency can be improved. The fourth aspect is from the first aspect to the third aspect. The plurality of fins may each have a plurality of cut-out standing pieces. Among the plurality of cut-out standing pieces, the most The windward side end surface of the cut-and-raised piece on the windward side is coated with an antifouling material. As a result, it is possible to reduce the increase in ventilation resistance caused by dust adhering to the windward side end face of the cut-out rising piece, and to realize a heat exchanger that exhibits higher heat exchange efficiency. Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in this embodiment, a separate type air conditioner in which an indoor unit and an outdoor unit are connected by a refrigerant pipe, a control wiring, and the like will be described as an example. However, the present invention is not limited by the embodiments. (Embodiment Mode) Figs. 1 and 2 are diagrams for explaining an indoor unit of a separate air conditioner. As shown in FIGS. 1 and 2, the main body 1 constituting the appearance of the indoor unit includes a suction port 2 that sucks in air, and a blowout port 3 that blows out the heat-exchanged air. The suction port 2 has a structure in which a suction opening in a top surface portion of the body 1 and an opening portion in a front surface of the body are combined. In addition, the main body 1 includes a front panel 4 covering a front surface of the main body 1. The filter 5, the heat exchanger 6, and the fan 7 are provided inside the body 1. The filter 5 captures dust contained in the indoor air. The heat exchanger 6 exchanges heat of the introduced indoor air. The indoor air introduced from the suction port 2 through the filter 5 is heat-exchanged by the heat exchanger 6. The fan 7 is a one-pass flow-type fan that generates airflow for blowing out from the air outlet 3 into the room. (2) The air outlet 3 is provided with an up-and-down air direction changing plate 8. The up-and-down air direction changing plate 8 can open and close the air outlet 3 and change the air blowing direction in the up and down direction. In addition, a plurality of left and right wind direction changing blades 10 are provided in the air duct 9 from the downstream side of the fan 7 to the upstream side of the air outlet 3, and the left and right wind direction changing blades 10 can change the blowing direction of air to the left and right. In addition, an electric unit 11 is disposed between the top surface of the body 1, the front panel 4, and the filter 5. The electric unit 11 is configured to control the operation of the air conditioner by controlling the fan 7, the up-and-down air direction changing plate 8, the right-and-left air direction changing blade 10, the compressor, and the like. In addition, a display portion 12 is provided on a front portion of the main body 1, and the display portion 12 displays an operation state of the air conditioner controlled by the electric unit 11. Next, the heat exchanger 6 will be described using FIGS. 3 to 6. 3 is a perspective view showing a part of the heat exchanger 6 according to the present invention, FIG. 4 is an enlarged front view showing the fin shape of the heat exchanger 6, and FIG. 5 is a view showing fins implemented in the heat exchanger 6. The schematic diagram of the antifouling coating of the cut surface of the sheet | seat 14, FIG. 6 is explanatory drawing which shows an example of the method of coating an antifouling material on the cut surface of the fin 14 of this heat exchanger 6. As shown in FIG. In FIGS. 3 to 6, the heat exchanger 6 is configured by passing a coil 13 through a plurality of fins 14 made of an aluminum thin plate. As shown in FIG. 2, the heat exchanger 6 is combined to form a substantially dogleg shape when viewed from the side. As shown in FIG. 4, the fin surface 14 a of the fin 14 is cut out and raised to form a plurality of cut out raised pieces 15. Apply the antifouling material on the fins 14 in the state of the material in advance. The fins 14 are formed by die-cutting by punching. In addition, the antifouling material 16 is applied to a cut surface facing the wind (hereinafter, referred to as a cut surface 14b) arranged on the windward side of the fin 14. Here, the cut surface refers to a surface newly exposed to the base material during press processing, and the cut surface 14 b refers to a cut surface disposed on the windward side of the fin 14. The antifouling material 16 applied to the cutting surface 14b is formed of a hydrophilic material. In this example, as shown in FIG. 5, the silicon dioxide particles 17 and the fluorine compound particles 18 are mixed to constitute the antifouling material 16. However, the antifouling material 16 is not particularly limited to this structure if it is hydrophilic. As shown in FIG. 6, the antifouling material 16 is crimped to the windward side of the fin 14 when the heat exchanger 6 is in a completed state by a sponge-shaped transfer member 19 impregnated with the antifouling material 16. The cut surface 14b is formed by transferring the antifouling material 16 to the cut surface 14b. In addition, the method of applying the antifouling material 16 to the cut surface 14b is not limited to the method described above, and the application may be performed by spraying or the like. Further, in the heat exchanger 6, among the cut-and-raised pieces 15 provided in the fins 14, at least on the wind-side end face of the cut-and-raised pieces 15a (see FIG. 4) closest to the wind side, Coated antifouling material 16. The antifouling material 16 of this cut-and-raised sheet 15 is formed by brush painting or the like. Next, the functions and effects of the heat exchanger configured as described above and the air conditioner using the heat exchanger will be described. First, briefly explain the operation of the air conditioner. The air conditioner heat-exchangs the air sucked from the suction port 2 through the heat exchanger 6 and blows it out from the air outlet 3 to air condition the room. The operating state of the air conditioner is indicated by the display unit 12 provided on the exterior panel.此 Here, the antifouling material 16 is applied to the end surface of the fin facing the side of the heat exchanger 6 opposite to the flow of the air sucked in from the suction port 2, in other words, to the cut surface 14 b on the windward side of the fin 14. Therefore, it is possible to reduce the situation where dust contained in the air adheres to the cutting surface 14b, suppress a clogged state on the windward side, and maintain a high heat exchange efficiency. If described in detail, the antifouling material 16 of this embodiment is formed of a hydrophilic material. As a result, when the dust contained in the air collides with the cutting surface 14 b of the fin 14, the fluorine compound particles 18 of the antifouling material 16 are ejected and blown to the downwind side. This effectively reduces dust adhesion to the cutting surface 14b. In addition, since oil droplets and the like contained in the air are also ejected by the fluorine compound particles 18 and blown to the downwind side, the adhesion can be reduced. In addition, when condensed water is generated on the surface of the fin 14 due to air-conditioning equipment or the like, the condensed water flows into the downwind side and is discharged as a thin film due to the hydrophilicity of the silicon dioxide particles 17. Therefore, the condensed water remains on the cutting surface 14b by its surface tension, and dust adheres to the remaining portion, which can reduce the accumulation. At the same time, oil droplets and the like become thin films due to the condensed water, and they flow to the downwind side as they roll on the surface. Therefore, problems caused when a lipophilic substance is used can be prevented, and a lipophilic substance such as oil droplets can be strongly discharged. Here, the problem described above refers to a case where the condensed water and the oil droplets are mixed into a thin film shape, and a part of the film is left on the cutting surface 14b. As described above, with this heat exchanger 6, it is possible to significantly suppress dust, water droplets, oil droplets, and the like from adhering to the cutting surface 14b of the fins 14 and causing a blockage. Therefore, even if it is used for a long period of time, it can still exhibit high heat exchange efficiency. FIG. 7 is a diagram showing the effect of the present invention when the antifouling material 16 is applied to the cut surface 14 b of the fin 14. Fig. 7 shows a sample (Comparative Example 1) in which the product of the present invention is maintained as a substrate (comparative example 1) and a sample (comparative example 2) in which a lipophilic antifouling material is coated on the compressed surface. The results of the test. The test is to install an indoor air conditioner in a test device having a space of a predetermined size, operate this normally, and observe and evaluate the state of dust adhesion. Dust is generated in the order of dust floc → fine powder of JIS powder → oil fume. As shown in FIG. 7, in the present invention, it was confirmed that compared with Comparative Example 1, there was less dust adhesion, and the effect by the antifouling coating of the cut surface 14 b was high. In addition, although Comparative Example 2 in which the lipophilic antifouling coating treatment was confirmed also had an antifouling effect, it was confirmed that a hydrophilic antifouling coating had a significant effect. In addition, the heat exchanger 6 shown in this embodiment can also exhibit the following effects. In other words, the application of the antifouling material 16 of the heat exchanger 6 is performed only in the vicinity of the cut surface 14b facing the windward side. The fin surface 14a other than the vicinity of the cutting surface 14b is in a state of a pre-coating material for antifouling coating. First, as shown in FIG. 6, the antifouling coating of the cut surface 14 b can be formed by crimping only the transfer member 19 impregnated with the antifouling material 16 to the cut surface 14 b of the fin 14. . Therefore, antifouling coating can be performed simply and in a short time. In the fins 14, the fin surface 14 a which has been subjected to antifouling coating in a state of a base material is not previously subjected to double antifouling coating. Therefore, it is possible to suppress a decrease in the heat exchange efficiency caused by the double coating, and it is possible to maintain a high heat exchange efficiency on the fin surface 14a. (2) As a method for performing antifouling coating on the cut surface 14b of the fin 14, for example, the entire fins 14 after press molding can be immersed in the antifouling material liquid, and antifouling coating can be performed on the cut surface 14b. However, in this case, the fin surface 14a which is subjected to the antifouling coating in a material state will have a double coating. In addition, the antifouling material 16 flows downward and is concentrated on the lower end portion of the fin 14 and the cut-and-raised bottom from which the raised-and-raised piece 15 is cut out, and becomes thicker. Therefore, a reduction in heat exchange efficiency is caused. In view of this, in the present invention, the antifouling material 16 is applied only in the vicinity of the cutting surface 14b, and the fin surface 14a other than the vicinity of the cutting surface 14b is maintained as a pre-coated material. In this way, it is possible to prevent the double antifouling coating of the fin surface 14 a and the reduction in heat exchange efficiency caused by the concentration of the antifouling material 16. In other words, it is possible to prevent the heat exchange efficiency improvement effect brought by the antifouling coating of the cutting surface 14b on the windward side, which is reduced due to the heat exchange efficiency reduction effect of the double antifouling coating of the fin surface 14a. Therefore, the heat exchange efficiency can be effectively improved. In addition, the antifouling material 16 is applied in the vicinity of the cutting surface 14b of the fin 14 by the transfer of the transfer member 19, and by brush coating for cutting out the windward side end surface of the rising sheet 15. However, this area is an extremely fine area, and the influence caused by the double coating of the antifouling material 16 can be ignored. In addition, a plurality of cut-and-raised pieces 15 are provided on the fins 14 to improve heat exchange efficiency. The antifouling material 16 is coated on the windward side end surface of the cut-out rising piece 15a located at least on the most windward side of the cut-out rising piece 15. Therefore, similarly to the cut surface 14 b of the fin 14, dust, water droplets, oil droplets, and the like can be largely suppressed and adhered and accumulated on the end surface of the cut-out rising piece 15 a to cause a blocked state. Therefore, higher heat exchange efficiency can be brought into play. In addition, by using the heat exchanger 6 configured as described above in an air conditioner, it is possible to exhibit good heat exchange efficiency for a long time. Therefore, a high-performance air conditioner can be provided. In addition, although it is desirable to apply the antifouling material 16 over the entire area of the end surface of the cutting surface 14b, it is also possible to achieve high heat exchange efficiency by applying it to a local area. In the foregoing, the heat exchanger according to the present invention and the air conditioner using the same have been described using the embodiments, but the present invention is not limited thereto. For example, although a plate-fin heat exchanger is exemplified as the heat exchanger 6, a plate-layer heat exchanger and other heat exchangers may be used, and the invention is not particularly limited to the above examples. In addition, although a mixed material of the silicon dioxide particles 17 and the fluorine compound particles 18 is exemplified as the antifouling material 16, other materials having hydrophilic properties may be used. In short, the embodiments disclosed this time are illustrative and not restrictive in all respects.旨 The gist of the scope of the present invention is disclosed not by the above description but by the scope of the patent application, and includes the meaning equivalent to the scope of the patent application and all changes within the scope. As described above, the present invention can provide a heat exchanger that exhibits high heat exchange efficiency for a long time, and a high-performance air conditioner using the same. Therefore, it can be widely used not only for general use, but also for commercial air conditioners, which is quite practical.

1‧‧‧ Ontology

2‧‧‧ suction port

3‧‧‧ blowout

4‧‧‧ front panel

5‧‧‧ filter

6‧‧‧ heat exchanger

7‧‧‧fan

8‧‧‧ Up and down wind direction change board

9‧‧‧ Ventilation duct

10‧‧‧ Left and right wind direction change blade

11‧‧‧Electrical Unit

12‧‧‧Display

13‧‧‧ coil

14‧‧‧ fins

14a‧‧‧fin surface

14b‧‧‧Pressed cut surface (cut surface)

15, 15a ‧‧‧ cut out standing piece

16‧‧‧Antifouling

17‧‧‧Silica dioxide particles

18‧‧‧ fluorine compound particles

19‧‧‧ transfer member

101‧‧‧ fins

102‧‧‧Antifouling

Fig. 1 is a perspective view of an air conditioner using a heat exchanger according to an embodiment of the present invention. FIG. 2 is a diagram showing a cross-sectional structure of the air conditioner according to the embodiment of the present invention. FIG. 3 is a perspective view showing a part of the heat exchanger according to the embodiment of the present invention. Fig. 4 is an enlarged front view showing the fin shape of the heat exchanger according to the embodiment of the present invention. FIG. 5 is a schematic diagram showing a structure of an antifouling coating applied to a cut surface of a fin of a heat exchanger according to an embodiment of the present invention. FIG. 6 is an explanatory diagram showing an example of a method for applying an antifouling material to a cut surface of a fin of a heat exchanger according to an embodiment of the present invention. FIG. 7 is a view showing the effect of the present invention after an antifouling material is applied to a cut surface of a fin of an embodiment of the present invention. Fig. 8 is a schematic diagram showing a conventional antifouling coating of a heat exchanger.

Claims (5)

A heat exchanger includes a plurality of laminated fins, and among the plurality of fins, an antifouling material is applied to a cut surface of at least one fin on the windward side. The heat exchanger according to item 1 of the scope of patent application, wherein the antifouling material is a hydrophilic material. The heat exchanger according to claim 1 or 2, wherein: 范围 only the vicinity of the cut surface of the fin facing the windward side is coated with the antifouling material, and 附近 the vicinity of the cut surface The faces of the other fins are still pre-coated materials. The heat exchanger according to item 1 or 2 of the scope of patent application, wherein: each of the plurality of fins has a plurality of cut-out standing pieces, among the plurality of cut-out standing pieces, most rely on the windward The windward side end surface of the cut-out rising sheet on the side is coated with the antifouling material. An air conditioner includes: a main body; a fan installed in the main body; and a heat exchanger in the main body that transforms wind from the fan into cold air and warm air, at least one of which is the heat The exchanger is a heat exchanger according to any one of claims 1, 2, 3, or 4.