KR20030083337A - Cleaning and Drying Method of Air-conditioner and Apparatus thereof - Google Patents

Abstract

PURPOSE: A method for cleaning and drying a refrigerant circulation channel of a refrigerant system and an apparatus for the same are provided to clean and dry the refrigerant circulation channel without separating components of a refrigerant cycle. CONSTITUTION: A first solenoid valve(10) is connected with an air generating unit, and switched to cleaning mode or drying mode. A second solenoid valve(20) is switched to cleaning mode or cleaner feeding mode. Air pressure is introduced into a wash liquid tank to feed wash liquid in the wash liquid tank through a feed tub(L3) with a check valve(C2) as the second solenoid valve is switched to the cleaning mode. The wash liquid fed through the feed tube is introduced into a third solenoid valve(30) switched to be connected with a high pressure port(HP) and a low pressure port(LP) of a refrigerant cycle(A). The wash liquid introduced into the third solenoid valve is discharged from the high pressure port to the low pressure port or from the low pressure port to the high pressure port depending on switching of the third solenoid valve to clean an inside of the refrigerant cycle. The first solenoid valve is switched to the drying mode to connect air pressure directly to the third solenoid valve to dry the inside of the refrigerant cycle.

Description

Cleaning and Drying Method of Air Refrigerant Circulation of Refrigerant System and Its Apparatus {Cleaning and Drying Method of Air-conditioner and Apparatus}

According to the present invention, each component constituting the refrigerant cycle of the air conditioner, that is, the scale contained in the piping of the refrigerant cycle through which the refrigerant is circulated is washed by simultaneously injecting a washing liquid or air bubbles, drying the washed refrigerant system, vacuum and refrigerant The present invention relates to a method and apparatus for cleaning and drying a refrigerant circulation path of a refrigerant system capable of filling gas.

In general, the refrigerant cycle refers to a compressor (the refrigerant is discharged in a gaseous state at high temperature and high pressure), a condenser (converts the refrigerant gas at high temperature and high pressure into a liquid phase at room temperature and high pressure), a capillary tube (reduces the refrigerant at low temperature and low pressure), and an evaporator (vaporization). Heat exchange) and heat exchange while passing through, and the heat exchanged with the surrounding air by the refrigerant gas evaporated in the evaporator to blow it into the blowing fan to cool the room or the refrigerator.

Refrigerant and cooling equipment and apparatus using such a refrigerant cycle is typical home air conditioners, car air conditioners and the like. In addition, there are various kinds of showcases, freezers, etc. that store vegetables, meat or fish.

As described above, the present invention can be applied to various refrigeration plants, but the following will be exemplarily described for an automotive air conditioner system for better understanding of the present invention, but this is merely for the purpose of understanding and various refrigeration apparatuses. It can be understood through the following description that it can be applied to.

As described above, the refrigerant cycle basically constitutes a refrigeration cycle as shown in FIG. 1, and a refrigerant gas injection port for filling or replenishing refrigerant gas therein is provided therein.

These ports are divided into a high pressure side port (HP) and a low pressure side port (LP). The high pressure side port (HP) is installed between the compressor (1-1) and the condenser (1-2), and the low pressure side port is an expansion valve. It is located between (1-3) and evaporator (1-4).

However, the conventional air conditioner for automobiles is a refrigeration system in which the refrigerant material is chemically changed by moisture or air contained in the oil and refrigerant gas in the compressor 1-1 during the operation of the refrigerant system A. An oxide film or scale is formed on the inner wall of the circulation passage constituting (A).

In Korea, when the refrigerant gas is charged based on mass or pressure, if scale is formed on the inner surface of the refrigerant circulation pipe, it is forced to meet the mass or pressure despite being forced to fill below the mass set at the factory. Charging is a common reflection.

This problem leads to overcharging, which overloads the compressor 1-1, thereby lowering the output of the engine driving the compressor 1-1, leading to a waste of fuel, and the internal combustion of the compressor 1-1. There has been a problem that causes damage to the compressor 1-1.

As the most preferable method of charging the refrigerant, the expansion pressure of the refrigerant gas is generated according to the temperature.

In order to solve this problem, conventionally, the components of the refrigerant system are disassembled and then cleaned by injecting the cleaning liquid into the pipe, but the vehicle must be stopped to repair the cooling function, and the parts must be separated from the vehicle body. Due to the disassembly and assembly work was very cumbersome and inconvenient.

Therefore, the present invention has been proposed to solve the above problems according to the prior art, an object of the present invention is to clean the scale or oxide stuck in the refrigerant circulation path of the refrigerant cycle for the air conditioner, but does not remove the components of the refrigerant cycle The present invention provides a method and apparatus for washing and drying a refrigerant circulation path of a refrigerant cycle that can be washed and dried in a state where it is not installed.

As an embodiment of the present invention to improve the cleaning effect by injecting the air and the cleaning liquid at the same time in the cleaning by forcibly injecting the cleaning liquid into the high pressure or low pressure port of the refrigerant cycle through the air, and also without removing the refrigerant cycle Cleaning and drying, vacuum and filling are all performed.

The present invention may be washed by injecting the washing liquid directly into the refrigerant circulation path through the air, and may also blow only air to dry the moisture after the washing.

However, it was found that the invention was created with a focus on complex batch processing such as washing and drying operations and inconvenience of connecting the pneumatic line alternately to the high pressure side port or the low pressure side port provided on the circulation path of the refrigerant cycle. .

1 is a view illustrating a typical refrigerant cycle,

Figure 2a, 2b is a perspective view showing the front and rear of the washing and drying apparatus of the refrigerant circulation path of the refrigerant system according to the present invention,

3 is a circuit diagram of a washing and drying method of a refrigerant circulation path of a refrigerant system according to the present invention.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the refrigerant cycle cleaning and drying method of the refrigerant cycle according to the present invention for achieving the above object according to the present invention.

Figure 2a is a perspective view showing a refrigerant circulation path washing and drying apparatus of the refrigerant cycle (A) according to the present invention.

Refrigerant cycle washing and drying method of the refrigerant cycle (A) according to the present invention;

When the first solenoid valve 10 connected to the air generating means 1 is switched to the washing mode in which washing and drying modes are selected, the pneumatic line is switched by the second solenoid valve 20. When the second solenoid valve 20 is placed in the washing mode, air pressure flows into the washing liquid tank T1, and the washing liquid contained therein is transferred to the washing tube C2. The third solenoid valve 30 is transferred along the L3) and the washing liquid transferred by the transfer pipe L3 is selectively connected to the high pressure port HP and the low pressure port LP of the refrigerating system A. Flows into. The washing liquid introduced into the third solenoid valve 30 is discharged from the high pressure port to the low pressure port or the low pressure port to the high pressure port selected by the third solenoid valve 30 and coupled to the port. Injected into the high pressure port (HP) or low pressure port (LP) for refrigerant injection coupled to the phase is characterized in that to wash the inside of the refrigerant cycle (A). Of course, in the drying operation, when the first solenoid valve 10 is switched to the dry position, pneumatic pressure is directly connected to the third solenoid valve 30 to dry the inside of the refrigerant cycle A as described above.

In addition, by allowing the air bubbles and the washing solution to pass through the refrigerant circulation path of the refrigerating system (A) at the same time, it is possible to further improve the washing power.

According to this embodiment, a part of the air entering the washing liquid tank T1 can be achieved by directly connecting the bypass pipe to the feed pipe L3 and providing the check valve C1 in the line. The check valve C1 is a valve that proceeds only in one direction without pneumatic pressure entering in the reverse direction.

In this case, the pneumatic pressure is divided into the washing liquid tank T1 and the bypass pipe, so that the washing liquid is discharged to the transfer pipe L3 by the pneumatic pressure introduced into the washing liquid tank T1, and the inflowed air introduced into the bypass pipe. Is joined with the transfer pipe (L3) and the air bubbles and the washing liquid is to be transferred along the transfer pipe (L3).

As shown in FIG. 1, the third solenoid valve 30 for selecting the high pressure and the low pressure is designed such that the refrigerant cycle A is structurally circulated only in one direction. In other words, a check valve is provided in the compressor 1-1 so that the refrigerant circulates from the compressor 1-1 to the condenser 1-2, but cannot proceed to the other side. It will be washed.

As such, the entire cycle of the refrigerant cycle must be washed twice, so that a valve for switching the path so that the cleaning liquid or air bubbles can be injected into any one of the high pressure (HP) and the low pressure port (LP) is provided. 3 solenoid valve (30).

Therefore, the washing liquid introduced into the third solenoid valve 30 passes through the circulation path of the refrigerant cycle A through the flow path selected by the third solenoid valve 30 to wash the inside thereof, and the washed washing liquid is filtered. Through the (F) foreign matter is filtered and collected again to the collection tank (T2-1).

Here, those skilled in the art will be able to practice various modifications through the present specification. For example, by blowing air into the washing liquid tank (T1) to the high pressure port (HP) or the low pressure port (LP) of the refrigerant cycle (A) to transfer the cleaning liquid, or the bypass line to the transfer pipe (L3) It is possible to achieve the purpose of the noble only by connecting to the structure, but it is to be clear that it is included only in the technical spirit of the true meaning intended by the inventors only separating the washing process.

After the internal cleaning of the refrigerant cycle (A) is completed, the interior of the drying process will be described.

In the drying process, when the first solenoid valve 10 is selected to be in the drying mode, the pneumatic pressure is directly introduced into the third solenoid valve 30 along the line L5 having the check valve C3 and the third solenoid valve 30 Air is passed through the inside of the refrigerant cycle A selected by).

On the other hand, when the washing liquid tank T1 does not contain the washing liquid, or is exhausted, or when the washing is carried out again, a return line for returning the washing liquid to the washing liquid tank T1 so that the washing liquid collected in the collecting tank T2 can be used again. L7) may be further included.

Washing liquid return line (L7) is connected between the second solenoid valve 20 and the collection tank (T2) by the pneumatic line (L6) to switch the second solenoid valve 20 to the washing liquid transfer mode, the pneumatic pressure collection tank (T2) The washing liquid contained therein is directly transferred into the washing liquid and is conveyed into the washing liquid tank T1 along the conveying pipe L7. At this time, the washing liquid conveyed along the conveying pipe (L7) does not flow in the opposite direction by the check valve (C4).

At this time, the pneumatic pressure introduced into the washing tank (T1) and the collection tank is purged through the pneumatic lines (L2, L6) connected to the second solenoid valve (20).

Sides of the washing liquid tank and the collecting tank are provided with gauges T1-1 and T2-1 for visually viewing the washing liquid and the collection amount.

In addition, according to the present invention a known independent configuration for vacuuming and charging the refrigerant cycle after washing and drying the refrigerant cycle according to the present invention

As described above, the present invention does not remove the components of the refrigerant cycle (A), so that washing, drying, vacuum, and filling processes can be performed in one system (A), thereby providing an excellent workability. .

The present invention can firstly clean the inner wall of the refrigerant circulation path to maintain the purity of the refrigerant gas, it is possible to maximize the cooling effect. In addition, even when driving a compressor, such as a car, it is possible to significantly reduce the problems caused by overload, which can be expected to extend the life of the compressor.

Claims (4)

When the first solenoid valve connected to the air generating means 1 is switched to the washing mode for washing and drying, the pneumatic pressure is introduced into the second solenoid valve for selecting the washing and the detergent transfer mode. When the second solenoid valve is placed in the washing mode, pneumatic pressure flows into the washing liquid tank T1 through the pneumatic line, and the washing liquid contained therein is transferred along the transfer pipe L3 having the check valve, and the feeding pipe L3. The washing liquid conveyed by the second liquid flows into the third solenoid valve for switching between the high pressure port and the low pressure port LP, which is selectively connected to the high pressure port HP and the low pressure port LP of the refrigerating system A, and the third solenoid valve The washing liquid introduced into the discharge port is discharged from the high pressure port (HP) to the low pressure port (LP) or from the low pressure port (LP) to the high pressure port (HP) to wash the inside of the refrigerant cycle (A). A refrigerant circulation passage for cleaning and drying method of (A). When the first solenoid valve connected to the air generating means (1) has a port and the washing and drying mode is switched to the washing mode, the pneumatic pressure flows into the second solenoid valve to select the washing and detergent transfer mode again. When the second solenoid valve is placed in the washing mode, pneumatic flows into the washing liquid tank T1 through the pneumatic line, and the washing liquid contained therein is transferred along the transfer pipe L3 having the check valve, and the feeding pipe L3. The cleaning liquid conveyed by) flows into the third solenoid valve for switching between the high pressure port and the low pressure port LP, which is selectively connected to the high pressure port HP and the low pressure port LP of the refrigerating system A, and the third solenoid Refrigerant yarn characterized in that the cleaning liquid flowing into the valve is discharged from the high pressure port (HP) to the low pressure port (LP) or from the low pressure port (LP) to the high pressure port (HP) to clean the inside of the refrigerant cycle (A) A refrigerant circulation passage for cleaning and drying apparatus of the class. The apparatus of claim 1 or 2, wherein a gauge is further provided on the side surfaces of the washing liquid tank and the collecting tank. The refrigerant cycle cleaning and drying apparatus of a refrigerant cycle according to claim 2, further comprising a vacuum and a charging device in the refrigerant circulation cleaning and drying apparatus of the refrigerant cycle.