JPH06331293A - Fin and tube type heat exchanger - Google Patents

Abstract

PURPOSE:To provide a fin and tube type heat exchanger which can prevent generation of oil smell without lowering hydrophilic function in operation of a device which uses this heat exchanger. CONSTITUTION:The fin and tube type heat exchanger is formed of a number of hydrophilic film coated fins 12 which are arranged in parallel at a prescribed pitch and a tube 11 through which refrigerant flows. In this instance, the hydrophilic film coated fin 12 is provided on the surface with a coat layer 13 which is coated with interface activator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fin and tube type heat exchanger used for heat pump air conditioners and the like.

[0002]

2. Description of the Related Art A fin-and-tube heat exchanger is suitable for providing a hydrophilic property as well as a corrosion resistance on the fin surface so that condensed water attached to the fin surface does not become water drops during cooling operation. By getting wet and flowing down, the ventilation resistance is reduced, noise is reduced and performance is maintained.

Further, the quality required for the fin-and-tube type heat exchanger has spread not only to corrosion resistance and hydrophilicity but also to reduction of odor and mold growth from the heat exchanger.

A conventional example (Japanese Patent Laid-Open No. 62-172194) will be described below with reference to FIGS.

FIG. 5 is a perspective view of a conventional fin-and-tube heat exchanger, and FIG. 6 is a cross-sectional view of the main parts of the fin-and-tube heat exchanger.

As shown in FIGS. 5 and 6, the conventional fin-and-tube type heat exchanger 1 has a large number of hydrophilic coatings arranged in parallel at regular intervals by expanding a tube 2 through which a fluid flows. It has a structure in which the outer circumference of the tube 2 is brought into close contact with the collar inner surface portion 3 a of the applying fin 3.

[0007]

However, the hydrophilic coating 3b has a porous surface and has a property of easily absorbing press oil or the like due to a capillary phenomenon. With the above-described structure, the hydrophilic coating 3b is used during fin pressing. When the press oil is washed with a cleaning agent such as an organic solvent system, or when the volatile press oil is dried with hot air, the tube 2 is expanded and brought into close contact with the collar inner surface portion 3a of the hydrophilic film-applying fin 3.
A cleaning agent or hot air is applied to the hydrophilic inner surface 3a of the collar 3b.
There was a problem that the press oil absorbed by the hydrophilic coating 3b on the inner surface 3a of the collar could not be removed, and the residual press oil oozes out with the passage of time to decrease the hydrophilicity. .

Further, when the air conditioner is in heating operation, the collar inner surface portion 3
The residual press oil oozing out from the hydrophilic coating 3b of a causes an oily odor, and the color inner surface portion 3 is used during the summer cooling season.
There is a problem in that the reproduction of mold may be promoted by the influence of the press oil remaining in a and a mold odor may be generated.

Although not shown in the figure for the purpose of avoiding these problems, there are some hydrophilic coatings to which a surfactant or a fungicide is added.
The effect of removing the press oil absorbed by the hydrophilic coating 3b was almost ineffective.

In view of the above problems, the present invention provides a fin-and-tube heat exchanger in which the press oil is unlikely to remain on the inner surface of the collar and the mold odor due to the growth of mold is prevented.

[0011]

In order to solve the above-mentioned problems, the fin-and-tube heat exchanger of the present invention has a large number of hydrophilic film-applying fins arranged in parallel at regular intervals, and a refrigerant flows inside. A tube is used, and the surface of the hydrophilic film-coated fin is further provided with a coating layer coated with a surfactant or a coating layer coated with a surfactant and a fungicide.

[0012]

According to the present invention, with the above structure, the press oil absorbed by the hydrophilic coating on the inner surface of the color by the coating layer coated with the surfactant dissolves in the condensed water by an emulsification reaction with the condensed water during the cooling operation. It can be easily removed and the generation of oily odor can be prevented.

Further, the coating layer coated with the surface active agent and the fungicide can also prevent the generation of oily odor and the mold odor caused by the growth of mold.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A fin-and-tube heat exchanger according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a main part of the fin-and-tube heat exchanger of the present invention, and FIG. 2 is a perspective view of the fin-and-tube heat exchanger.

As shown in FIGS. 1 and 2, the fin-and-tube type heat exchanger 10 of the present invention expands a tube 11 through which a fluid flows, so that a large number of water glasses are arranged in parallel at regular intervals. Alternatively, the hydrophilic film-provided fin 1 having the hydrophilic film 12b containing silicate or the like as a main component
2 is adhered to the outer circumference of the tube 11, and the surface of the hydrophilic film-providing fin 12 has a coating layer 13 coated with a solution in which a surfactant having an action of emulsifying water and oil, such as sodium sulfosuccinate, is appropriately dissolved. Is provided, and the coating layer 13 is arranged at the interface between the inner surface portion 12a of the collar 12 of the hydrophilic film-applying fin 12 and the tube 11.

According to the present embodiment, the function of the coating layer 13 allows the condensed water and the residual press oil condensed on the hydrophilic film-forming fins 12 to be easily emulsified and washed out during the cooling operation, so that the hydrophilic film is formed. The press oil remaining on the interface between the collar inner surface portion 12a of the applying fin 12 and the tube 11 can be removed to prevent the generation of an oily odor, and the hydrophilic property which is the original function of the hydrophilic film applying fin 12 may be impaired. Absent.

Next, a fin-and-tube type heat exchanger according to another embodiment of the present invention will be described with reference to the drawings.

FIG. 3 is a sectional view of a main part of the fin-and-tube heat exchanger of the present invention, and FIG. 4 is a perspective view of the fin-and-tube heat exchanger.

As shown in FIGS. 3 and 4, the fin-and-tube type heat exchanger 20 of the present invention expands a tube 21 through which a fluid flows so that a large number of water glasses are arranged in parallel at regular intervals. Alternatively, the hydrophilic film-applying fin 2 having the hydrophilic film 22b containing silicate or the like as a main component
2 is adhered to the outer periphery of the tube 21, and the surface of the hydrophilic film-providing fin 22 has a function of emulsifying water and oil and a surfactant such as sodium sulfosuccinate and T
Coating layer 2 coated with a solution containing an appropriate antifungal agent such as BZ (benzothiazole) and parachlorometaxylenol
3 is provided, and the interface between the collar inner surface 22a of the hydrophilic film-applying fin 22 and the tube 21 has a structure in which the film layer 23 is arranged.

According to the present embodiment, the function of the coating layer 23 allows the condensed water and the residual press oil condensed on the hydrophilic coating fins 22 to be easily emulsified and washed out during the cooling operation. The press oil remaining at the interface between the inner surface 22a of the collar of the applying fin 22 and the tube 21 can be removed to prevent the generation of oily odor, and the hydrophilicity, which is the original function of the hydrophilic film applying fin 22, can be impaired. Absent. Further, even in the summer season when molds are easily propagated, mold growth can be suppressed and generation of mold odor can be prevented.

[0022]

As described above, the fin-and-tube heat exchanger of the present invention is composed of a large number of hydrophilic film-providing fins arranged in parallel at regular intervals and a tube through which a refrigerant flows, A coating layer with a surface-active agent applied on the surface of the fins with a hydrophilic coating makes it easy to remove the press oil remaining on the interface between the fins with the hydrophilic coating and the tube, along with the condensed water formed during the cooling operation. It is possible to prevent the generation of oily odor without losing the hydrophilic function.

In the case where the surface of the hydrophilic film-applied fin is further provided with a film layer coated with a surfactant and an antifungal agent, the press oil remaining on the interface between the hydrophilic film-applied fin and the tube can be removed. At the same time, the growth of mold can be suppressed and the generation of oily odor and mold odor can be prevented.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts of a fin-and-tube heat exchanger according to an embodiment of the present invention.

FIG. 2 is a perspective view of a fin-and-tube heat exchanger according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of essential parts of a fin-and-tube heat exchanger according to another embodiment of the present invention.

FIG. 4 is a perspective view of a fin-and-tube heat exchanger according to another embodiment of the present invention.

FIG. 5 is a perspective view of a conventional fin-and-tube heat exchanger.

FIG. 6 is a sectional view of a main part of a conventional fin-and-tube heat exchanger.

[Explanation of symbols]

 10, 20 Fin-and-tube heat exchanger 11, 21 Tube 12, 22 Hydrophilic film-applying fin 13 Coating layer 23 Coating layer 12a, 22a Color inner surface portion 12b, 22b Hydrophilic coating

Claims (2)

[Claims] 1. A coating layer comprising a large number of hydrophilic film-coated fins arranged in parallel at regular intervals and a tube through which a refrigerant flows, the hydrophilic film-coated fin having a surface further coated with a surfactant. A fin-and-tube heat exchanger characterized by being provided with. 2. A multiplicity of hydrophilic film-applying fins arranged in parallel at regular intervals and a tube through which a refrigerant flows, the surface of the hydrophilic film-applying fins further comprising a surfactant and a fungicide. A fin-and-tube heat exchanger having a coated coating layer.