KR20030030762A - Apparatus for preventing corrosion of condenser in air conditioner - Google Patents

Abstract

PURPOSE: An apparatus for preventing corrosion of a condenser of an air conditioner is provided to prevent galvanic corrosion by electric insulation. CONSTITUTION: A plastic pipe(30) is installed on a periphery of a refrigerant pipe(23) of a condenser for insulation between the refrigerant pipe and a radiating fin(22) so as to prevent galvanic corrosion due to electric potential difference between the refrigerant pipe and the radiating fin. Alternatively, insulation such as polymer film is coated on the periphery of the refrigerant pipe for insulation between the refrigerant pipe and the radiating fin joined to the refrigerant pipe.

Description

Corrosion prevention device of air conditioner condenser {APPARATUS FOR PREVENTING CORROSION OF CONDENSER IN AIR CONDITIONER}

The present invention relates to a corrosion preventing apparatus of an air conditioner condenser, and more particularly, to a corrosion prevention apparatus of an air conditioner condenser suitable for improving the service life of the condenser by preventing contact of parts of the condenser and corrosion caused by a potential difference.

In general, a window air conditioner is installed on the wall of a building, and an indoor unit located indoors of a building and an outdoor unit located outdoors are integrally equipped with a separate room air conditioner in which an outdoor unit and an indoor unit are separated, and a large packaged air conditioner. It is different.

Such a window type air conditioner is shown in FIGS. 1 and 2, which will be described briefly as follows.

As shown in FIG. 1, the window type air conditioner has a wide inlet port 2 for sucking indoor air at one side of the front side of the box chain case 1, and a discharge port for discharging the heat-exchanged cold air to the room side. 3) is formed, a plurality of adjustment knobs (4) for controlling the operation of the air conditioner is coupled to the lower side of the discharge port (3).

As shown in FIG. 2, the inner side blocking wall body 12 and the outer side blocking wall body 13 are provided on the upper side of the base plate 11 installed in the case 1 at regular intervals. In the rear of the indoor side blocking wall 12, a barrier 14 which serves as a support and partitions the indoor side and the outdoor side is assembled.

In addition, a driving motor 16 is installed at the motor mount unit 15 formed at one side of the barrier 14, and a blowing fan 17 for circulating air is installed at an indoor end of the driving motor 16. The cooling fan 18 is coupled to the outdoor end.

In addition, an evaporator 18 is installed in front of the blower fan 17 to heat exchange the indoor air sucked through the suction port 2, and a condenser 19 is installed in front of the cooling fan 18. have.

3 is a view showing the condenser 19, a fixed space (21, 21 ') is provided on both sides at a predetermined interval, the plurality of heat radiation fins on the inside of the holder 21 (21') 22 are provided, and the coolant tube 23 is coupled to the heat dissipation fins 22 in a zigzag shape.

Reference numeral 20 in the drawings is a compressor for compressing the refrigerant gas at high temperature and high pressure.

Accordingly, when the conventional window air conditioner configured as described above is driven, the hot air sucked into the inlet 2 by the blower fan 17 is heat-exchanged with cold air while passing through the evaporator 18, and then the outlet 3 is opened. It is discharged to the room through.

In addition, the condenser 19 located on the outdoor side generates heat by the refrigeration cycle, the heat generated in this way is the heat generated by the wind blown by the cooling fan 18 is released to the outside.

However, the conventional window type air conditioner configured as described above corrodes the parts of the condenser 19 installed on the outdoor side when rainwater or salt water penetrated from the outside when installed in an area with heavy rainfall or on the coast, and such corrosion is Due to the full-position corrosion generated between the parts to proceed more quickly to reduce the efficiency or cause a problem.

SUMMARY OF THE INVENTION An object of the present invention devised in view of the above problems is to provide a corrosion preventing device of an air conditioner condenser suitable for preventing electrical potential corrosion from occurring when assembling the components constituting the condenser.

1 is a perspective view showing the structure of a conventional window air conditioner.

Figure 2 is a cross-sectional view showing the structure of a conventional window air conditioner.

Figure 3 is a front view showing the structure of a conventional condenser.

Figure 4 is a front view showing an embodiment of a corrosion preventing device of the present invention air conditioner condenser.

5 is a side cross-sectional view of FIG. 4.

6 is a perspective view showing another embodiment of the present invention.

** Description of symbols for the main parts of the drawing **

21,21 ': Fixture 22: Heat dissipation fin

23: refrigerant pipe 30: plastic pipe

40: polymer membrane

In order to achieve the object of the present invention as described above, a common air conditioner condenser comprising a pair of fixing rods installed at regular intervals, and a plurality of heat dissipation fins installed in the holder and a refrigerant pipe coupled to the heat dissipation fins. The anti-corrosion device of the air conditioner condenser is provided by installing an insulating member on the outer circumferential surface of the refrigerant pipe to block electrical contact with the heat dissipation fins to prevent potential difference corrosion.

When the air conditioner having the condenser configured as described above is supplied with power and the blowing fan rotates, the air in the room is sucked into the inside of the case through the inlet, passes through the evaporator, and is heat-exchanged with cold air to be blown back into the room. In the condenser installed on the side, heat is generated by the freezing cycle, and the heat generated in this way is cooled by the wind blown from the cooling fan.

In addition, the condenser installed at the outdoor side as described above is assembled after the refrigerant pipe is inserted into the through-hole formed in the heat dissipation fin, and then expanded. Potential corrosion is prevented to prevent breakage of components due to corrosion.

Hereinafter, with reference to the embodiment of the accompanying drawings, the present invention configured as described above in more detail as follows.

Since the basic structure of the window type air conditioner is the same as the conventional configuration shown in Figs. 1 and 2, a detailed description thereof will be omitted. However, the same parts as in the prior art will be described with the same reference numerals.

As shown in Figure 4 and 5, the condenser 19 has a fixed base (21, 21 ') is provided on both sides at a predetermined interval, and a plurality of heat radiation fins inside the holder (21) (21'). (22) are installed at equal intervals, the through hole (22a) formed in the heat radiation fins (22), the refrigerant pipe (23) through which the refrigerant is circulated is inserted into a zigzag shape and coupled, the refrigerant pipe is coupled as such On the outer circumferential surface of (23), a plastic tube 30 is provided as an insulating member so as to electrically insulate the refrigerant pipe 23 and the heat dissipation fins 22 from each other.

The heat dissipation fin 22 constituting the condenser 19 is made of aluminum, the refrigerant pipe 23 is a copper pipe, and the holders 21 and 21 'are made of a galvanized steel sheet. GALVANIC CORROSION is dominant due to potential difference in electrolyte of dissimilar metals. These three dissimilar metals forming the condenser 19 have different electrochemical series in the corrosive environment, and copper (Cu) is the least corrosive among the condenser components, followed by Fe, Zn and Al. However, Al is highly corrosive in a corrosive environment, but corrosion occurs and at the same time, an oxide film resistant to corrosion is formed and corrosion resistant materials such as Al such as Zn and Fe are not formed. Corrosion occurs first, and then corrosion proceeds in order of Al and Cu.

Here, the electrochemical series refers to the tendency of various metals to be reduced based on the tendency of hydrogen to be reduced, and that the metal having a larger tendency than the tendency of hydrogen to be reduced has a positive potential, Metals with a tendency are listed in order of (-) potential, and the higher (-) potential, the better the corrosion.

The electrochemical series of the components of the condenser (standard potential electrode in 25 ℃ aqueous solution) is shown in the table below.

table

Therefore, in the present invention, during the manufacture of the condenser 19, the refrigerant pipe 23 is inserted into the through hole 22a formed in the heat dissipation fin 22, and then assembled by expansion, but the outer peripheral surface of the refrigerant pipe 23 By expanding the tubing with the cylindrical plastic tube 30 made of PP material made of vinyl, the refrigerant pipe 23 and the heat dissipation fin 22 are insulated from each other, thereby forming a space between the refrigerant tube 23 and the heat dissipation fin 22. The potential difference corrosion of does not occur.

6 shows another embodiment of the present invention, as shown, by coating an insulator such as a polymer film 40 on the outer circumferential surface of the refrigerant pipe 23 made of Cu material, which is combined with the refrigerant pipe 23. Insulation between the heat dissipation fins 22 is made.

As described above, when the polymer film 40 is coated on the outer circumferential surface of the refrigerant pipe 23 with an insulator, the insulator is thinly formed so that heat conduction for heat dissipation is well conducted while electrical insulation is performed, thereby preventing occurrence of potential corrosion. .

As described in detail above, the corrosion prevention apparatus of the air conditioner condenser of the present invention is provided with a plastic pipe on the outer peripheral surface of the refrigerant pipe of the condenser, the electrical contact between the components by the insulation between the refrigerant pipe and the heat radiation fin by the plastic pipe. It is possible to block the occurrence of the potential difference corrosion caused by, thereby improving the service life of the condenser and parts.

Claims (3)

In a conventional air conditioner condenser comprising a pair of fixing rods that are installed at regular intervals, a plurality of heat dissipation fins installed inside the holder and a refrigerant pipe coupled to the heat dissipation fins, the refrigerant tube and the outer circumferential surface of the refrigerant tube; Corrosion preventing device of the air conditioner condenser, characterized in that the insulating member is installed to prevent the potential difference corrosion between the radiating fins. The corrosion preventing apparatus of claim 1, wherein the insulation member is a plastic pipe. The corrosion preventing apparatus of claim 1, wherein the insulating member is a polymer film coated on an outer circumferential surface of the refrigerant pipe.