KR200319512Y1 - Automatic Processing Apparatus for Air-conditioner - Google Patents

Abstract

The present invention includes various apparatuses for performing refrigerant recovery, cleaning, vacuuming, refilling or recharging in the refrigerant cycle device, and have selected a semi-automatic mode or an automatic mode for selecting any one of the above operations. The above operations are accomplished through automatic circuit opening and closing means, which are controlled to automatically pass through the high pressure side port and the low pressure side port of the refrigerant cycle in a timely manner by opening the means according to the program. All of the refilling or recharging operations are connected to the respective devices through the automatic circuit opening and closing means or cut off, and the high and low pressure side port automatic circuit opening and closing means of the refrigerant device is programmed centrally. In the following description, the device is controlled to be controlled by a CPU.

Description

Automatic Processing Apparatus for Air-conditioner for Refrigerant Recovery, Cleaning, Vacuum, Filling or Refilling

The present invention relates to a refrigerant gas filled washing and vacuum device capable of automatically replenishing or filling, washing, vacuuming, or filling a refrigerant gas in an air conditioner refrigerant cycle. In order to carry out the process, the inlet of the high pressure port and the low pressure port is automatically opened and closed so that the filling, replenishment, internal cleaning and vacuum operation of the refrigerant gas in the refrigerant cycle device can be automated. A device for automatically batch processing a refrigerant recovery, washing, vacuum, filling or replenishment.

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). And heat exchange through the heat exchanger), and the air heat-exchanged in the evaporator is blown into the room with a blower fan to cool the room or the refrigerator.

Refrigerant and cooling devices and devices using such a refrigerant cycle device 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 all kinds of refrigeration equipment, but the following will be exemplarily described for an automotive air conditioner device for better understanding of the present invention, but this is merely for the purpose of understanding and various refrigeration equipment. It can be understood through the following description that it can be applied to.

As described above, the refrigerant cycle device basically comprises a refrigeration cycle (A) as shown in FIG. 1, and a high and low pressure side port for refrigerant gas injection (HP) for filling or replenishing refrigerant gas therein during use (HP). ) LP is provided.

The high pressure side port HP is installed between the compressor and the condenser, and the low pressure side port LP is located between the expansion valve and the evaporator.

However, the conventional air conditioner for automobiles has an inner wall of a circulation path constituting the refrigerant cycle device by chemically changing or changing the refrigerant material by moisture or air contained in oil and refrigerant gas in the compressor during the operation of the refrigerant cycle device. An oxide film or scale is formed on the substrate.

In Korea, when the refrigerant gas is charged based on the mass, when the scale is formed on the inner wall of the refrigerant circulation pipe, it is forced to be charged according to the mass despite being forced to fill below the mass set at the factory. This is a reflection.

1 is a diagram illustrating a conventional refrigerant cycle.

This problem leads to overcharging, which overloads the compressor, thereby lowering the output of the engine driving the compressor, leading to a waste of fuel, and causing the compressor to be burned, resulting in damage to the compressor.

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

Conventionally, in order to solve the above problems, the components of the refrigerant device are disassembled and then washed by injecting the cleaning liquid into the pipes, but the vehicle must be stopped to repair the cooling function, and the parts are separately removed from the vehicle body. Since it has to be removed, the work of disassembling and assembling has been very cumbersome and inconvenient. However, the filling, replenishing, cleaning, and vacuum work of refrigerant gas are not all unified, and each process must be performed separately. Work efficiency is very cumbersome and complicated.

In other words, in the case of the first air conditioner, a filling operation for injecting and charging refrigerant gas therein, a supplementing operation for replenishing a shortage of refrigerant gas during use, a washing operation for washing the inside of the refrigerant cycle device, and a refrigerant cycle Each of the above processes, such as a vacuum operation to vacuum the inside of the apparatus, can be performed separately, but this operation cannot be performed in an integrated manner.

Recently, as a device for integrating the above work, Korean Utility Model Registration No. 1996-2654 "Recovery, Regeneration, Cleaning, Filling Device of Refrigerant Air Conditioner for Automotive Air Conditioner" and Utility Model Publication No. 1998-40183 "Air Conditioner for Automobile" Various technologies have been proposed, such as automatic gas replenishment device and Korean Patent Publication No. 1998-10265, "Refrigerator cleaning, compression, vacuum, and charger", and most of these techniques can be performed manually. Not all the work processes to be performed in the refrigerant cycle apparatus as described above are performed.

As described above, the main reason why the existing work cannot be collectively performed is that the piping or tube hose of the processing device connected to the high pressure port or the low pressure port provided on the circulation path of the refrigerant cycle device is not suitable. The problem is that each time a change is made, the hose or tube must be connected to each port.

The present invention is to enable the batch processing of the overall work by automatically opening and closing the line of the external device or device connected to the high-pressure port and the low-pressure port of the refrigerant cycle device in performing the above-described work. .

An object of the present invention is a recovery operation for recovering the refrigerant gas to the refrigerant cycle device using the refrigerant gas, a washing operation for cleaning the inside of the cycle device, a vacuum operation to vacuum the inside of the cycle device, a replenishment operation to charge or replenish the shortage And a line of devices for performing the above-mentioned operations in the maintenance work of maintaining the refrigerant cycle, and each of these lines comprises a passage between the high pressure side port and the low pressure side port installed in the refrigerant cycle of the vehicle. The present invention provides an apparatus and a method for automatically batch processing refrigerant recovery, washing, vacuuming, refilling or refilling which can automatically process a general work process by automatically opening timely in the process of performing the process.

Another object of the present invention is a replenishment device for filling or replenishing a shortage of refrigerant by injecting refrigerant gas into a refrigerant cycle device using a refrigerant gas, a washing device for cleaning the inside of the refrigerant cycle device, and a vacuum device for vacuuming the inside of the refrigerant cycle device. It is to provide a high pressure side port and a low pressure side port of the refrigerant cycle and the means for automatically opening and closing the circuit to perform the functions of the above devices to perform all the work.

The problem to achieve the object of the present invention includes a variety of devices for performing the refrigerant recovery operation, cleaning operation, vacuum operation, refrigerant replenishment or filling operation in the refrigerant cycle device, semi-automatic to select any one of the above operations When the mode or the automatic mode is selected, the above operations can be accomplished through an automatic circuit switching means controlled to automatically open the means in a high pressure side port and a low pressure side port of the refrigerant cycle according to a program in a timely manner. .

The recovery, cleaning, vacuum, replenishment or filling operations are all connected to the respective devices through or through the automatic circuit opening and closing means, and the high and low pressure side port automatic circuit opening and closing means of the refrigerant device is It is configured to be controlled by a programmed central processing unit (hereinafter referred to as a CPU), which will be described below in detail with respect to the components that perform each task and the process of the CPU.

The high and low pressure ports of the refrigerant cycle and the opening and closing means for automatically opening and closing the respective devices and devices are connected to each other in a substantially rhombic shape with lines connected to each other, and a solenoid valve is installed in each line to connect the solenoid valve to the CPU. When a programmed process is carried out, the solenoid valve can be connected to the port in a timely manner.

In addition, each part of the lozenge-shaped circuit line is connected to the input and output lines of the various devices that perform the above-mentioned operation by connecting to the port during the opening and closing operation of the solenoid valve to perform the overall operation as described above. It is.

1 is a view illustrating a typical refrigerant cycle device.

2 is a circuit diagram of a multifunctional inspection and automatic processing device of a refrigerant cycle apparatus according to the present invention.

3 is a conceptual diagram schematically showing a process according to the present invention.

4 (a) to 4 (c) are flowcharts illustrating a process according to the present invention.

5 is a conceptual view showing a diagnostic example for diagnosing the failure and abnormality of the refrigerant cycle device according to the present invention.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the apparatus and method for automatically batch processing the refrigerant recovery, washing, vacuum, filling or replenishment according to the present invention will be described.

2 is a circuit diagram of a multi-function inspection and automatic processing apparatus of a refrigerant cycle apparatus according to the present invention, FIG. 3 is a conceptual view schematically showing a process according to the present invention, and FIG. 4 is a flowchart showing a process according to the present invention. 5 is a conceptual view showing a diagnosis example for diagnosing the failure and abnormality of the refrigerant cycle device according to the present invention.

As shown in FIG. 2, the device according to the present invention has a recovery device 30, a charging device 20, a vacuum device 40, a cleaning device 30, and each of the devices described above, as can be seen in the circuit diagram. And automatic circuit opening / closing means 10 controlled by a programmed CPU between the high pressure side port HP and the low pressure side port LP.

For reference, the CPU controlling the automatic switchgear means 10 will be described after explaining the connection relationship between the apparatus and the automatic switchgear means, but for the sake of understanding, the automatic circuit switchgear 10 Please understand that a number of solenoid valves included in the) is working.

The circuit automatic opening and closing means 10 is connected to the hollow pipes in a generally rhombic or quadrangular shape, each of which is equipped with solenoid valves 1 to 6. For convenience, pipes are referred to as lines, and each line is denoted by reference numbers A, B, C and D.

The solenoid valves 1 to 6 which open and close the passage of a line are provided in the A-D line all.

Line A and line B are connected to each other to form a high-pressure side E line that is connected to the high pressure side port (HP), and the refrigerant recovery container 37a (B) and C line are connected to finally recover and store the refrigerant. 37b) is connected to the line F, C line and D line is connected to form a low pressure side G line connected to the low pressure side port (LP), D line and A line is connected to form an H line.

The solenoid valve 1 having a check valve function normally cut off toward the E line is provided in the above-mentioned A line, and the solenoid valve 4 having a check valve function normally cut off toward the G line is provided at the above D line. .

The line B is composed of a solenoid valve 5 having a check valve function normally cut off toward the F line side and a solenoid valve 2 having a check valve function cut off toward the E line. It consists of a solenoid valve 6 having a check valve function cut off to the line side and a solenoid valve 3 having a check valve function cut off to the E line. Each valve is controlled by the CPU so that the B line and the C line are controlled. Open and close the Reference numeral 7 denotes a solenoid valve.

The filling device 20 is connected to the above F line from the refrigerant gas stored in the container 21 and is connected to the B line and the C line.

The recovery device 30 is connected to the H line is connected to the lines A and D. The refrigerant recovery device 30 is a solenoid valve (1, 4) installed on the A and D line is opened by the CPU (200, see Figure 3), the refrigerant gas charged in the refrigerant cycle device 100 is G line and It is discharged along the E line and flows into the refrigerant separator (31).

The refrigerant gas introduced into the refrigerant separator 31 is stored in the separator, and the gas is introduced into the compressors 34a and 34b through the air filter 32. The compressors 34a and 34b are installed in two types, and are performed to separate the work according to the type of refrigerant material.

In general, two types of refrigerants, R-12 and R-134a, are used to determine the type of refrigerant charged in the air conditioner of a vehicle, and thus it may be separately collected or disposed of. Therefore, the solenoid valves 32a and 32b which are selectively opened and closed by the CPU are opened at the inlet side of the recovery compressors 34a and 34b, so that the compressors 34a and 32b are adapted to the refrigerant materials. It flows into 34b).

The opening and closing of the solenoid valves 32a and 32b are performed by a CPU. The type of refrigerant gas is initially determined, and the type of refrigerant is recovered in advance. It is intended to fill the, it is used as information when automatically opening and closing the solenoid valve (34c, 34d) installed in the line of the input terminal of the divided compressor (35a, 35b) suitable for the type of refrigerant gas during recovery.

As a method of determining the type of refrigerant material, the gas sensor SS is detected through the gas sensor SS as shown in FIG. 2, and thus detailed description thereof will be omitted.

However, the solenoid valves 33a and 33b (21a and 21b) installed at the inlet side of the compressors 34a and 34b when the refrigerant recovery operation mode is performed in advance in the process of the CPU 200 to be described later. It is used as information to control the opening and closing by sending an electrical signal to any one of).

The refrigerant gas introduced into the compressors 34a and 34b is compressed to high temperature and high pressure so that the oil separated from the refrigerant passing through the oil separators 35a and 35b is returned to the compressors 34a and 34b again. When the high temperature and high pressure refrigerant passes through the coolant separator 31, the liquid refrigerant in the coolant separator 31 is vaporized by the heat of the high temperature and high pressure refrigerant so that the air filter 32 and the compressor 34a and 34b are evaporated. The condenser 36 is transferred to the condenser 36, and the refrigerant having a high temperature and high pressure is converted into a refrigerant having a low temperature and high pressure and collected into the refrigerant recovery containers 37a and 37b.

Valves 38a and 38b are respectively installed in the lines entering the refrigerant recovery tanks 37a and 37b to selectively open and close the refrigerant according to the type of refrigerant, and the valve 38a is a refrigerant recovery container 37a. Solenoid valve running only to the side, and 38b is a manual valve.

This operation is operated until a pressure below a certain value is detected by the low pressure sensor LS installed in the G line connected to the low pressure side port LP, and the value detected by the low pressure sensor LS is set to the CPU. If it is below, the operation is stopped.

The coolant separator 31 is provided with a drain valve 31a for erasing waste oil on its bottom surface to remove foreign matters such as moisture or a coolant that does not need to be recovered.

When the CPU 200 commands the washing mode, the solenoid valves on the B and C lines are selectively opened. When the refrigerant gas (wash water) is injected into the high pressure side port (HP) according to the circulation path of the refrigerant cycle, the low pressure The solenoid valves 2 and 3 are closed to be discharged toward the side port LP, and the solenoid valves 5 and 6 are opened to open the passage. Of course, the solenoid valves 1 and 4 are kept closed.

On the contrary, when the washing water flows into the low pressure side port LP and is discharged toward the high pressure side port HP, the solenoid valves 5 and 6 are closed and the solenoid valves 2 and 3 are opened to open the passage. The solenoid valves 1, 4 are of course kept closed.

In this way, since the refrigerant gas is circulated through the inside of the refrigerant cycle device, the cleaning force therein provides a very excellent cleaning sequence. Of course, you can use a separate washing water (AIR MAX) to enhance the cleaning power.

The vacuum device 40 having the vacuum pump 41 is connected to the H line described above and includes a solenoid valve 41a. The operation of the vacuum pump 41 is operated when the vacuum mode is performed by the CPU 200. In the vacuum mode, the solenoid valves 1 and 4 installed in the A line and the D line are opened by the CPU 200 to open the high pressure and The air in the refrigerant cycle device is sucked and vacuumed from the low pressure side port HP (LP).

This vacuum operation is performed for 1 to 5 minutes at intervals of up to 30 minutes until the signal detected by the low pressure sensor LS is below a predetermined value. When the pressure detected by the low pressure sensor LS is 0.5 or less, the CPU 200 ) Stops the vacuum pump 41.

The washing device 50 is a case where the refrigerant gas charged in the refrigerant cycle device is oxidized by a chemical reaction due to prolonged use of the refrigerant, and the scale is deposited on the inner wall so that the scale is thickened on the inner wall of the refrigerant cycle and to remove impurities. In the process, the refrigerant recovered in the refrigerant recovery tanks 37a and 37b may be used, or a separate washing water may be used.

Hereinafter, with reference to the accompanying drawings, a method for automatically batch processing refrigerant recovery, washing, vacuum, filling or replenishment according to the present invention will be described in detail.

Figure 3 is a block diagram showing the configuration of the software according to the process of automatically processing the refrigerant recovery, washing, vacuum, filling or replenishment according to the present invention, reference numeral 200 is a CPU, 201 is a sensing unit 202 is an input unit, 203 is a storage unit that stores information input through the input unit and the sensing unit, and 204 is an output unit which outputs a situation in which a result processed by the CPU is being processed.

The sensing unit 201 detects the refrigerant pressure, the type of the refrigerant, the temperature, the weight of the refrigerant gas, the temperature of the atmosphere, and transmits the sensing value to the CPU 200 to compare the information with the value set in the CPU. It is a factor to judge.

The input unit 202 is an item initially input by the user and is mainly used as basic data by inputting the year / month / date, date time, vehicle number, temperature, and the like. It includes a selectable keyboard and buttons.

The CPU compares the values sensed by the sensing unit 201 and the values set in the CPU based on the data sensed by the sensing unit 201 to determine the above-described solenoid valves 1 to 6, 21a, 21b, and 34c. , 34d, 41a, 38a open and close operations and the operation of the vacuum pump 40, compressor 34a, 34b and the like.

The output unit 204 includes elements such as a small monitor or LCD screen, LED, speaker, and the like. The output unit 204 serves to output the information determined by the CPU 200 or to express it to the outside.

Figure 4 shows a flow chart showing a process according to the present invention, as shown in Figure 2 the high-pressure side port (HP) and the low-pressure side port (LP) to the E line and G line of the device according to the present invention After coupling by hand, when the power is applied, the low pressure sensor LS and the high pressure sensor HS installed in the low pressure side port LP and the high pressure side port HP determine the internal pressure and In addition, the type of refrigerant is determined by the refrigerant sensor SS, stored in the storage unit 203, and used as important data for comparison with a set value set in the CPU.

Hereinafter, in describing the refrigerant recovery, cleaning, vacuum, and charging method of the refrigerant cycle apparatus according to the present invention, there are differences in the operation characteristics in each of the above processes, but the types of the refrigerant are R-12 and R- for clarity. Refrigerant gas of any one of two types, such as 134a, is charged to the vehicle, and the type of the charged refrigerant is a state determined in the initializing process of the system by the gas sensor (SS) used. Assume

In addition, it is assumed that the refrigerant container 21 contains a desired type of refrigerant. In addition, when the refrigerant is recovered, cleaned, vacuumed or charged, the vehicle is started or the air conditioner is stopped and operated in a timely manner. It was assumed that the work was done in the correct condition (with the engine and air conditioner on the vehicle, internal circulation mode, maximum cooling, and maximum airflow).

In addition, it is assumed that the engine speed is set to 1,500 to 1,800 in the case of a gasoline vehicle (including a gas vehicle) when the engine is started, and the speed is set to 1,300 to 1,500 in the case of a diesel engine.

When the automatic and semi-automatic modes are selected among the operation modes arranged on the keypad, the refrigerant type is already selected, and the refrigerant container contains the refrigerant gas to be charged and is ready for operation.

Therefore, the process of automatically performing the above-mentioned tasks sequentially by selecting the automatic mode in the above system will be described, and then the process of independently performing will be described.

The automatic mode is a process for automatically performing the refrigerant recovery, washing, vacuum, filling process, and the semi-automatic mode is a process for independently performing the above automatic process.

Select the keypad in auto mode and press the run button.

As the first step 101, the solenoid valves 1, 4, and 7 installed on the A and D lines are opened by the CPU to proceed with the refrigerant recovery, and the remaining valves 2, 3, and all are closed. As the refrigerant is discharged from the high pressure and low pressure side ports HP and LP, the refrigerant flows into the refrigerant separator 31. As described above, the refrigerant gas introduced into the refrigerant separator 31 is introduced into the compressors 34a and 34b through the air filter 32.

The compressors 34a and 34b identify the type of refrigerant by the CPU and automatically open the solenoids 32a and 32b provided on the inlet side of the recovery compressors 35a and 35b to open the compressor 34a. In) 34b.

The refrigerant gas introduced into the compressors 34a and 34b is compressed to high temperature and high pressure, passes through the oil separators 35a and 35b, and the oil is returned to the compressors 34a and 34b. Is passed through the refrigerant separator 31 is transferred to the condenser 36.

When the high-temperature, high-pressure refrigerant gas passes through the refrigerant separator 31, the refrigerant separator 31 is heated using high temperature heat to vaporize the liquid refrigerant stored therein, such as the air filter 32 and the compressor 34a. The condenser 36 is transferred to the condenser 36 through the condenser 36, and the high-temperature, high-pressure refrigerant is converted into a low-temperature, high-pressure refrigerant and collected into the refrigerant recovery containers 37a and 37b.

The two refrigerant recovery containers 37a and 37b are for recovering according to the type of refrigerant. Each valve 38a, 38b is provided between the refrigerant | coolant collection container 37a (37b) and the condenser 36 path | route.

When the recovery is completed as described above, the recovery completion signal is output through the output unit 204 to the output unit 204 as a buzzer or a letter and notified to the operator, and then to the washing mode that is the second step 102 by the programmed CPU. It is switched automatically.

In the washing mode, the refrigerant stored in the refrigerant collection container can be used or a separate washing water can be used. The washing water is installed in the G line.

When the washing mode is selected, the solenoid valves 2, 4, 21b are opened by the CPU 200. The refrigerant enters the high pressure port (HP) through the B line along the F line and is discharged toward the low pressure port (LP) and flows into the refrigerant separator 31 along the D line to the refrigerant recovery container 31 as described above. Finally stored.

On the contrary, when the solenoid valves 21b, 3, 1 are opened by the CPU 200, the refrigerant enters the low pressure port LP through the C line along the F line and is discharged toward the high pressure port HP to discharge the A line. Accordingly, the refrigerant flows into the refrigerant separator and is finally stored in the refrigerant recovery container as described above. This process is set in the CPU to proceed for several tens of minutes.

When the time set in the CPU is reached, the solenoid valve is opened and closed, and the third step 103 is continued.

As the third step 103, when the vacuum mode is started, the solenoid valves 1 and 4 of the A and D lines are opened, and the solenoid valves 2, 3 and 7 are closed to close the high pressure side port HP and the low pressure side. The air is sucked out of the port LP and vacuumed. The process time can be set by the operator but is exemplified as being programmed in the CPU by vacuuming for approximately 20 minutes. When the vacuum operation is completed, the CPU automatically performs a leak process (step 4).

In the fourth step 104, the low pressure sensor LS is primarily used to detect the vacuum for about 15 seconds, and the detected value is sent to the storage unit at the initial 1 to 3 seconds and later (13 to 15 seconds). The sensed value is stored in the unit 203, and the CPU judges the value compared with the set value, and if the value is different, it is determined as a leak and the second vacuum operation is performed for a predetermined time (about 5 minutes). After the re-vacuum, the leak (leak) test for 15 seconds, if the leak (leak) is still detected, after warning the worker through the output unit 204 all the work is stopped.

This is to prevent unnecessary work because the filling gas leaks out when there is a leaking part on the refrigerant cycle, and the operator finds the leaking part of the refrigerant cycle device and repairs it. You have to work.

Please refer to the following description for reworking independently performing only vacuum mode. If no leak (leak) is found after the re-vacuum, the CPU is switched to the charging mode, which is the fourth step 104.

As the fifth step 105, the solenoid valves 2 and 3 on the B and C lines are opened and 1 and 4 are closed by the command of the CPU, and the refrigerant contained in the refrigerant container 21 is connected to the high pressure side port ( HP) or low pressure port (LP) is charged for a certain time.

When the refrigerant reaches a predetermined time after the refrigerant is charged for a predetermined time through the high and low pressure ports HP and LP, the system outputs a buzzer or a letter to the output unit 204 by the CPU and temporarily stops the operation of the system itself.

The operator then starts the vehicle, turns on the air conditioner, adjusts the internal circulation mode-maximum cooling, airflow-maximum and keeps all windows open. These conditions persist until the end of the work.

After pressing the continuation key, the low pressure sensor installed in the low pressure side port LP senses the pressure and stores it in the storage unit 203 and charges it until the CPU 200 reaches the set value compared with the set value. If the refrigerant pressure reaches the appropriate reference value, the solenoid valves 2 and 3 block the injection of the refrigerant gas and automatically stop the operation, and then output the charging completion message by voice or text through the output unit 204. .

At this time, if the filling pressure is insufficient because the gas in the refrigerant gas cylinder 21 is insufficient, if the charging process is insufficient, if the charging is not completed even if the set time is not enough, the message of the refrigerant shortage message is displayed on the output part in the CPU to replace the refrigerant gas cylinder and press the Execute key. The process as described above is carried out again.

Next, the process of performing each process independently is demonstrated.

As shown in FIG. 4, after the semi-automatic mode is selected among the automatic and semi-automatic mode selection buttons, an independent process is performed by selecting one of the refrigerant recovery mode, the washing mode, the vacuum mode, and the charging mode.

When the refrigerant recovery mode is selected first, when the recovery mode key is selected and the execution key is pressed, the solenoid valves 1, 4 and 7 installed in the A and D lines are opened by the CPU and the valves 2 and 3 remain closed. It becomes a state. Therefore, the refrigerant is discharged from the high pressure and low pressure side ports HP and LP and flows along the H line into the refrigerant separator 31.

As described above, the refrigerant gas introduced into the refrigerant separator 31 flows into the compressors 34a and 34b through the air filter 32 and flows into the compressors 34a and 34b. The refrigerant gas is compressed to high temperature and high pressure, passes through the oil separators 35a and 35b, and the oil is returned to the compressors 34a and 34b, and the high temperature and high pressure refrigerant passes through the refrigerant separator 31 described above. Are stored in the condenser 36 and the selected refrigerant recovery vessels 37a and 37b.

When the coolant recovery is completed, the buzzer or text outputting the recovery completion signal through the output unit 204 notifies the operator and ends.

The washing mode is started by selecting a washing mode key and then pressing an execution key. The washing mode may be used by using a refrigerant stored in the refrigerant recovery container 37a or using a separate washing water.

The solenoid valves 2, 4, 21b are opened by the CPU. The refrigerant enters the high pressure port (HP) through the B line along the F line, is discharged toward the low pressure port (LP), and flows into the refrigerant separator 31 on the H line along the D line to recover the refrigerant as described above. Finally it is stored in the barrel 37a.

On the contrary, when the solenoid valves 21b, 3, and 1 are opened by the CPU, the refrigerant enters the low pressure port LP through the C line along the F line, and is discharged toward the high pressure port HP, along the A line. The refrigerant flows into the refrigerant separator 31 and is finally stored in the refrigerant recovery container as described above.

The vacuum mode is initiated by selecting the vacuum mode key and pressing the execute key. The solenoid valves 1 and 4 of the A and D lines are opened, and the valves 2, 3 and 7 are closed and the high pressure is applied through the B and C lines. The low pressure side port sucks the internal air and vacuums it.

As described above, the vacuum pump 41 is operated for about 20 minutes to perform the vacuum operation. When the vacuum operation is completed, the CPU 200 automatically performs the leak (leak) process of checking the leakage of the above-mentioned refrigerant, and is terminated when it is confirmed by the CPU as described above. If it is determined that the vacuum mode is terminated.

When the charging mode is selected on the keypad and the execution key is pressed, the solenoid valves 2 and 3 on the B and C lines are opened by the command of the CPU, and the valves 1 and 4 are closed so that the refrigerant container 21 is closed. The refrigerant contained therein is charged into the high pressure side port HP or the low pressure side port LP for a predetermined time.

When the set time is reached while the refrigerant is charged for the time set by the high and low pressure side ports HP and LP, the system outputs a warning sound and a text through the output unit 204, and then temporarily stops operating.

The operator then starts the vehicle, turns on the air conditioner, adjusts the internal circulation mode-maximum cooling, airflow-maximum and keeps all windows open. These conditions persist until the end of the work.

After pressing the "Continue key" of the keypad, the refrigerant pressure is measured through the low pressure sensor (LS) connected to the low pressure side port (LP) and then transferred to the storage unit 203 is stored, this value is set to the CPU program It will be charged until the value is reached. If the refrigerant pressure reaches the set reference value range, the open solenoid valve is shut off to automatically stop the refrigerant charging operation and outputs the completion of charging through the output unit 204.

At this time, if the gas is insufficient, a message of the refrigerant shortage message is output to the output unit, if the new refrigerant gas cylinder is replaced by pressing the "run key" to perform the process as described above.

As described above, the present invention allows the high pressure side port and the low pressure side port to be opened and closed through the solenoid valve in a timely manner in order to perform various types of work processes for maintaining the refrigerant cycle. will be.

In addition, the present invention may further include a failure cycle and abnormality diagnosis mode of the refrigerant cycle apparatus in addition to the apparatus and method for collectively processing the refrigerant recovery, washing, vacuum, and charging of the refrigerant cycle apparatus.

The failure and abnormality diagnosis mode of the refrigerant cycle apparatus is performed by measuring the temperature of each part of the refrigerant cycle apparatus as shown in FIG. 5 and checking the abnormality of the component by the measured value.

For example, by measuring the temperature of the input and output of the compressor (34a, 34b), the input and output of the condenser 36, the input and output of the dryer to determine the abnormality through the temperature difference to determine the temperature of each part A temperature sensor (consisting of the sensing part) that detects is used. The values sensed by the plurality of temperature sensors from the input and output terminals of each component are sent to the storage unit 203 to determine whether the temperature difference between the input and output terminals is within the range set in the CPU or above or below the range. 204).

This will be described in detail. First of all, to check the failure and abnormality of the compressors 34a and 34b, turn on the engine, operate the air conditioner, and then contact two different temperature sensors with the input and output lines of the compressors 34a and 34b, respectively. When the sensor senses the value, the sensor stores the value in the storage unit 203. The CPU 200 outputs the diagnosis result as "normal" when the result value is within the set range based on the programmatically set range, and immediately outputs "check request" to the output unit 204 when the temperature difference is 45 degrees or more. Information is provided for the operator to repair or replace the compressors 34a and 34b.

In this manner, the input and output ends of the condenser 36 and the dryer are detected, and the result is determined by the CPU and output to the output unit 204.

For reference, when the temperature difference between the input terminal and the output terminal of the condenser 36 is within 15 ° C., a “check request” is output. When the temperature difference is 15 ° C. or more, it is determined to be normal and a message is displayed on the LCD screen “normal”.

As described above, the present invention integrates the general work by automatically opening and closing the connection line of the external device or the line connected to the high pressure port and the low pressure port of the refrigerant cycle device in performing the overall work of the refrigerant cycle. It can be processed sequentially in one batch process.

Claims (5)

In the apparatus for charging or replenishing, replenishing, recovering, washing and vacuuming a refrigerant gas in a refrigerant cycle device, A recovery device for recovering the refrigerant, a cleaning device for cleaning the inside of the refrigerant cycle device, a vacuum device for vacuuming the inside of the refrigerant cycle device, a device for charging or replenishing the refrigerant; Automatic circuit opening and closing means for opening and closing the line so that the line of the device is connected to the high-pressure port and the low-pressure port of the refrigerant cycle device in selectively performing any one of the devices or collectively performing the above-described general operations. 10; The automatic circuit opening and closing means (10) and a device for automatically batch processing refrigerant recovery, washing, vacuum, filling or replenishing, characterized in that consisting of a control device for automatically or semi-automatically controlling the above devices. 2. The solenoid valve (1-4) according to claim 1, wherein the automatic circuit opening / closing means forms lines A to D having a substantially rhombus shape, and each line A to D opens and closes the line. 5 and 6 are installed, connecting the A line and the B line to form a high pressure side line (E) connected to the high pressure side port (HP), and the B line and the C line are connected to the refrigerant recovery container 37a. Line 37 is connected to (37b), the C line and the D line is connected to form a low-pressure side line G to be connected to the low pressure side port (LP), the D line and the A line is connected to form a line H A device for automatically batch processing refrigerant recovery, washing, vacuum, filling or replenishing, characterized in that one. According to claim 2, Refrigerant recovery, washing, characterized in that by connecting the two compressors installed on the refrigerant recovery line in series according to the type of refrigerant to select any one compressor by the CPU to process the refrigerant; Automatic batch processing of vacuum, filling or replenishment. The apparatus of claim 2, wherein the refrigerant cycle is cleaned by using the refrigerant gas stored in the refrigerant recovery container to collectively process the refrigerant recovery, washing, vacuuming, recharging, or replenishment. The apparatus of claim 2, wherein the washing water is attached to the washing line so that separate washing water is used in the washing mode.