KR100823529B1 - Heat dissipation method of vehicle coolant circulation cycle inspection and repair equipment - Google Patents

Abstract

The present invention relates to a method for improving the stability and reliability of the vehicle refrigerant circulation cycle inspection and repair apparatus, the present invention relates to a vehicle refrigerant circulation cycle to collectively process the refrigerant recovery, washing, vacuum, filling or replenishment process In the inspection and repair device, in order to dissipate the heat of the compressor and the heat of the condenser during the cleaning operation, the CPU (central processing unit) receives the sensing value detected by the temperature sensor and compares it with the set temperature. If the sensing temperature value is higher than the set value, the CPU operates the sirocco fan to allow the outside air to flow between the heat sink fins of the condenser and discharge the internal air to the outside to lower the temperature of the compressor (inside the housing) within the set range. If the temperature of the sensing value is lower than the set value, the CPU is turned off by the CPU. By controlling, the stability and reliability of the system can be improved. The heat dissipation device according to the present invention has excellent heat dissipation effect compared to the conventional heat dissipation device in dissipating the heat in the system so that the temperature in the system does not adversely affect the operation of the CPU or various semiconductor devices, and thus, the operation speed of the CPU is reduced. It maintains stable system performance without errors due to semiconductor processing and shortening or loss of compressor life.

Description

COOLING METHOD OF EQUIPMENT FOR CHECKING REFRIGERANTS CYCLE PERFORMANCEAND}

1 is a configuration diagram of a known vehicle refrigerant cycle;

Figure 2 is a perspective view illustrating a conventional refrigerant cycle cycle inspection and repair device,

3 is a block diagram showing the internal configuration of the refrigerant circulation cycle check and repair apparatus shown in FIG.

3 is a circuit diagram illustrating an operation relationship according to a washing operation of a conventional refrigerant circulation cycle check and repair apparatus;

Figure 4 is a side cross-sectional view of the refrigerant circulation cycle check and repair apparatus shown in FIG.

FIG. 5 is a cross-sectional view illustrating main parts of the heat dissipation structure of the refrigerant circulation cycle check and repair apparatus shown in FIG. 2;

6 and 7 are a right side view and a rear view of the heat dissipation structure of the refrigerant circulation cycle check and repair apparatus shown in FIG. 2;

8 is a side cross-sectional view of a refrigerant circulation cycle inspection and repair apparatus employing a heat dissipation device according to the present invention;

9 is a planar cross-sectional view showing the main portion of the condenser radiator according to the present invention;

10 is a side cross-sectional view showing the main portion of the coupling structure of the heat dissipating sirocco fan according to the present invention;

11 is a pro chart according to the heat dissipation device according to the present invention.

<Description of the symbols for the main parts of the drawings>

100: Inspection and repair device of refrigerant circulation cycle

100a: housing

100b: outside air inlet

110: control panel

HP, LP: High pressure and low pressure ports for refrigerant circulation cycles

TS: Temperature sensor

SF: Sirocco fan

The present invention is to secure the stability and system performance of the refrigerant circulation cycle check and repair device that can work collectively by integrating the washing and vacuum of the refrigerant circulation cycle of the vehicle air conditioner, recovery and filling of refrigerant gas into one device It relates to a heat dissipation method for improving the.

Most cars are equipped with air conditioners with the configuration of a refrigerant cycle to cool the temperature in the summer.

A typical refrigerant circulation cycle includes a compressor (1) for compressing a refrigerant at high temperature and high pressure, a condenser (2) for condensing the refrigerant discharged from the compressor (1), and the condenser (2) as shown in FIG. An expansion valve (3) for controlling the flow rate of the condensed liquid at room temperature and high pressure and converting the refrigerant into a low pressure refrigerant, and an evaporator (4) for converting the refrigerant liquid at low pressure into the gas state at low temperature and low pressure. Consists of The refrigerant gas is filled in the piping of the refrigerant circulation cycle to repeatedly circulate the refrigerant circulation cycle.

The refrigerant gas having a low temperature and low pressure in the expansion valve (3) flows into the evaporator (4) and evaporates while depriving heat necessary for evaporation from the ambient air of the evaporator (4), and the deprived air is cooled to cool the evaporator (4). Blowing cold air into the room by a blower (5, blower) coupled to one side of the lowers the temperature.

In the evaporator 4, the liquid refrigerant introduced from the expansion valve 3 and the evaporated gas refrigerant coexist, and the state change from the liquid to the gas is made. The gas refrigerant evaporated in the evaporator (4) is again sucked into the compressor (1), and the sucked refrigerant is compressed into a gas refrigerant having a high temperature and high pressure by being easily liquefied by cooling water or air at room temperature and described above. Repeat the refrigerant cycle. Of course, in order to inject the refrigerant, the refrigerant injection ports (HP, LP) are attached to the high pressure side and the low pressure side piping lines, respectively, so that the refrigerant gas can be charged from the outside.

However, as described above, when the amount of the refrigerant gas is insufficient, or when there is a failure in the refrigerant circulation, the cooling efficiency is drastically reduced, and the compressor is overloaded, thereby rapidly reducing the output of the vehicle.

In addition to the above-mentioned problems, the air conditioner malfunctions when the refrigerant gas is insufficient or absent in the refrigerant circulation pipe, when the scale or foreign matter is caught in the inner wall of the pipe, and the flow of the refrigerant is not desired. If it contains foreign substances, it is also caused by various reasons.

Degradation of the air conditioner makes it easy to check whether the refrigerant gas is properly measured by measuring the pressure of the refrigerant cycle pipe, but the various types of abnormality diagnosis as described above are difficult to diagnose the failure site or abnormality. There are also very troublesome and inconvenient problems in the screening method, such as the need to disassemble and check cycle components.

In order to solve this problem, a series of refrigerant cycles related to refrigerant circulation cycles have recently been recovered from the refrigerant circulation cycle, or the inside of the pipeline is cleaned, or the refrigerant gas is charged or replenished into the pipeline, gas leak check and leak check are performed. A system was developed that integrates all the work of the company into one device.

For example, Registered Utility Model No. 0319512 (Registration Date: 2003.06.30) "Method and apparatus for automatic batch processing of refrigerant recovery, cleaning, vacuum, filling or replenishment" (Manufacture: Maxtech Co., Ltd., ALPHAplus suggests alternatives to solve the above problems.

The integrated refrigerant circulation cycle inspection and repair apparatus 100 according to the pre-registered utility model is built in the housing 100a shown in FIG. That is, the refrigerant circulation cycle inspection and repair apparatus 100 may recover the refrigerant from the refrigerant circulation cycle, charge the refrigerant into the refrigerant circulation cycle pipe, or wash the inside of the refrigerant, or the refrigerant by the configuration as shown in FIG. 3. It is equipped with the function to check the leakage of the connection part of the cycle cycle automatically or individually.

The configuration and operation of the inspection and repair apparatus for the vehicle refrigerant circulation cycle will be understood in more detail with reference to the Utility Model Registration No. 319512, so a detailed description thereof will be omitted. However, the operation example of the process for the purpose of understanding the present invention will be briefly described with reference to FIG.

As a prerequisite to the description, the vehicle is started and the air conditioner is operated while the inspection and repair device for the refrigerant circulation cycle for the automobile is operated, and the operation mode briefly shows an example of the operation according to the process of performing an optional function. Explain.

In the refrigerant recovery process, a plurality of solenoid valves "1,4" are opened through a CPU control, and a path connected to the high pressure and low pressure ports HP and LP is opened, and the refrigerant flows into the refrigerant separator 31. Is introduced and finally recovered to the refrigerant recovery container, and outputs a recovery completion signal through the output unit 204 to end the recovery process.

The washing process of the refrigerant circulation cycle is started by selecting the washing process button among a plurality of job selection buttons disposed on the control panel 110 at the upper portion of the refrigerant management device. When the operation starts, the solenoid valves "2, 4," 21b "is opened, and the cleaning liquid flows into the high pressure port HP through the" F "and" B "lines and is discharged toward the low pressure port LP. The washing liquid discharged toward the low pressure port LP flows into the refrigerant separator 31 along the D line and is stored in the refrigerant recovery container 31. In this process, the high-pressure side refrigerant circulation cycle is cleaned.

This cleaning operation is continued for a set time and when the set time has elapsed, the solenoid valves "21b, 3, 1, 5" are opened by the CPU 200, and the solenoid valves "2, 5, 4" are controlled to close. The cleaning liquid is discharged from the low pressure port (LP) to the high pressure port (HP) along the "F, C and G" lines.

The washing liquid, refrigerant and oil discharged to the high pressure port (HP) are introduced into the refrigerant separator 31 along the "A and H" lines, and the foreign matter is contained in the refrigerant separator, and the refrigerant is returned to the respective refrigerant recovery bottles through the condenser. Are stored in. The cleaning operation is performed for a time set in advance in the CPU.

The vacuum process of the refrigerant circulation cycle is initiated by selecting the vacuum selection button, the solenoid valves 1 and 4 of the A and D lines are opened and the "2, 3, 5, 6 and 7" are closed so that the high pressure side port ( HP) and low pressure side port (LP) to suck the air and vacuum.

In order to check the vacuum state, after performing the above process, the time difference is automatically detected through the low pressure sensor LS, and the detected value is different. After performing the vacuum pressure through the low pressure sensor (LS), if the result is different, the output through the output unit 204 and stops, and if the vacuum pressure is matched (if there is no gas leakage), the CPU (200) Is switched to the charging mode.

The refrigerant filling process is started by selecting the filling process button in the refrigerant circulation cycle. When the operation is started, the solenoid valves "2, 3" on lines B and C are opened by the CPU and the solenoid valves "1, 4". "Is closed, and the refrigerant contained in the refrigerant container is charged into the high pressure port (HP) and the low pressure port (LP) for a set time, and when the set time is reached, the CPU outputs the current state to the output unit and stops. When the continuation key is selected, the low pressure sensor senses the charging pressure and stores it in the storage unit 203 and charges the CPU 200 until the set value is reached. If the set value is reached, the solenoid valve " 2 &quot; 3 "is blocked to block the charge of the refrigerant gas and the operation is automatically stopped and the end of work is displayed on the output (liquid crystal display).

However, when the washing operation is performed during the series of operations as described above, the output of the compressor is operated at the maximum, so the internal temperature of the refrigerant cycle check and repair device rises rapidly. The refrigerant cycle cycle check and repair device is mainly a hot season. As it is mainly used in (summer season), if the air temperature is higher than 30 ℃, the compressor temperature is already operated at the same temperature as the air temperature, so the temperature of the compressor is rapidly increased by the air temperature and the operating heat.

When the temperature of the compressor rises, the temperature inside the housing 100a is raised to cause the semiconductor, which is soldered to the motherboard MB installed in the housing, that is, the CPU, which is vulnerable to heat, to slow down the operation speed due to heat and to cause an error in processing or the compressor. The problem of suddenly lowering the compression performance of 34a often occurs.

In order to solve this problem, the present inventors install a blower fan 36a at the rear of the condenser 36 as shown in FIGS. 4 and 5 to improve the inflow of outside air into the housing 100a during the cleaning operation. However, when the outside air circulated from the outside, the air discharged to the exhaust port is discharged by the internal pressure, but due to the phenomenon that the internal air is repeatedly circulated through the blower, the discharge efficiency is low, the heat dissipation efficiency of the system is very low.

As shown in FIG. 4 and FIG. 5, the heat dissipation efficiency of the system by the blower fan 36a was measured. As a result, heat dissipation was confirmed as shown in Table 1 below.

[Table 1] Room temperature of refrigerant circulation cycle inspection and repair equipment

System Uptime (minutes) Temperature in housing at ambient temperature 25 ° C Temperature in housing at ambient temperature 35 ° C 5 25.6 35.7 20 38.3 48.6 40 47.2 56.8 60 52.6 61.2 80 54.7 63.4

As can be seen in [Table 1], the room temperature increases as the air temperature increases and the integrated washing time increases.

As a result, due to an increase in the internal temperature of the vehicle's refrigerant circulation cycle and the repair and maintenance device, the CPU operation processing speed is rapidly delayed in performing the refrigerant recovery, cleaning, vacuum, and charging operations, and the compressor is overloaded. System operation is unstable and durable, such as failure or failure, which greatly reduces the stability and reliability of the system.

The present invention was devised to solve the above problems, and an object of the present invention is to effectively dissipate the internal temperature of the system while cleaning the piping of the refrigerant circulation cycle through the vehicle refrigerant circulation cycle inspection and repair device to effectively heat the CPU. It provides a method of heat dissipation of the vehicle refrigerant cycle cycle check and repair device that greatly improves reliability by prolonging the stabilization and life of the system by preventing malfunctions associated with the associative function and processing of other semiconductors.

As a solution of the heat dissipation method of the heat dissipation device of the vehicle refrigerant circulation cycle inspection and repair apparatus according to the present invention

Sensing that the temperature of the compressor is detected by using a temperature sensor while cleaning the piping of the refrigerant circulation cycle through the vehicle refrigerant circulation cycle inspection and repair device that processes refrigerant recovery, cleaning, vacuum, filling or replenishment in a batch. If the sensing temperature value is higher than the set value, the CPU is operated by the CPU to allow the outside air to flow into the room through the heat sink fin of the condenser. By forcibly discharging to the outside by heat dissipation so that the temperature of the CPU or semiconductor on the printed circuit board embedded in the compressor and the housing is below the set range, and if the sensing temperature is lower than the set value, It can be achieved by controlling to cut off the power supplied to the.

The present invention is to detect the internal temperature generated during the operation of the refrigerant circulation cycle check and repair device to prevent the loss due to the overheating of the motherboard and the compressor with a CUP system according to the operation of the refrigerant circulation cycle check and repair device in a stable environment It can greatly improve the stability and reliability.

Hereinafter, a heat dissipation method of an automobile refrigerant cycle cycle inspection and repair apparatus according to the present invention will be described.

Refrigerant circulation cycle inspection and repair device 100 for a vehicle is provided with a control unit in the upper control panel 110, as shown in FIG. The control unit is provided with a main power switch and a function selection switch for automatically and manually moving the work.

The washing operation by the vehicle refrigerant circulation cycle inspection and repair apparatus 100 will be described.

When the washing operation is selected (ON) the washing button of the control panel 110, the washing operation starts.

Of course, the high and low pressure ports (LP) of the refrigerant circulation cycle (LP) connected to the connection hose (H, see Fig. 7) of the inspection and repair device 100 of the refrigerant circulation cycle, the vehicle is started and the air conditioner Drive on.

The cleaning of the vehicle's refrigerant cycle piping is designed to clean the high pressure side pipeline line for the time programmed in the CPU and then automatically proceed the low pressure side pipeline line when the system starts the cleaning operation.

First, when washing from the low pressure side port LP to the high pressure side port HP, the solenoid valves "3, 6, 1" are opened by the CPU 200, and "2, 5, 4" is electrically closed. Controlled by a signal, the washing liquid contained in the washing can flows into the low pressure port LP.

The washing liquid injected into the low pressure port LP is discharged toward the high pressure side port HP via the compressor 34a and the condenser 36 of the refrigerant circulation cycle, and the washing liquid discharged to the high pressure side port HP is line ". It flows into the refrigerant separator 31 along E "and" H ". If this operation is repeated for 20 to 30 minutes, that is, the cleaning is performed for the set time and the operation is automatically switched to the washing of the low pressure side pipe.

When the set time elapses, the solenoid valves "2, 5, 4, 7" are opened and the solenoid valves "1, 3, 6" are closed by the command of the CPU. Therefore, the washing liquid is injected into the high pressure side port HP via the pipe lines "F" and "E", passes through the dryer, the expansion valve 3 and the evaporator 4 of FIG. 1, and then the low pressure side port LP. To be discharged.

The washing liquid discharged to the low pressure side port LP is guided into the refrigerant separator 31 along the pipe lines "G and" H ".

When the washing liquid is introduced into the refrigerant separator 31, the oil or foreign substances washed by the washing liquid is stored therein, and the refrigerant is discharged under high temperature and high pressure by the compressor 34a through the air filter 32. The refrigerant is collected in the refrigerant recovery container 37a via the condenser 36 along the pipe passing through the inside of the refrigerant separator 31. As described above, since the compressor 34a is operated at the maximum output for at least 20 to 30 minutes, the temperature of the compressor 34a is increased by its own operating heat, and the temperature of the compressor 34a is measured using a temperature sensor (TS). Detected by).

As illustrated in FIG. 8, the temperature sensor TS is attached to an external surface of the compressor 34a to detect the temperature of the compressor 34a as illustrated in FIG. 11.

The signal value sensed by the temperature sensor TS is transmitted to the CPU, and the CPU performs a step of comparing and determining the set value preset by the manufacturer by the internal determination circuit unit 320.

As a result of determination, if the sensing value detected by the temperature sensor TS is higher than the set value, the CPU supplies power to the sirocco fan SF attached to the upper side of the housing 100a to generate the sirocco fan SF. Rotating step 330 is performed. If the sensing value of the temperature sensor TS is lower than the set value, the CPU stops the rotation of the sirocco fan SF by cutting off the power supplied to the sirocco fan SF.

When the sirocco fan SF is operated, external air flows into the condenser 36 embedded in the housing 100a and the neighboring air inlet 100b and passes between the radiating fins of the condenser 36.

The external air passing through the heat dissipation fins deprives heat of the cooling fins, deprives heat of the surface of the compressor 34a, and is forcibly discharged to the outside by the sirocco fan SF.

The heat dissipation as described above occurs during the time when the cleaning operation is finished.

The present invention is a method of inspecting and repairing a refrigerant circulation cycle of a vehicle and a heat dissipation method of the apparatus, when the washing operation of the refrigerant circulation cycle of a vehicle is started, the circuit is configured to operate the sirocco fan at the same time while the washing operation is performed. It is also possible to maximize the heat dissipation of the system by keeping one Sirocco fan (SF) running.

As described above, the temperature in the housing 100a by the heat dissipation action of the temperature sensor TS and the sirocco fan SF was measured.

[Table 2] Room temperature measurement table of refrigerant circulation cycle inspection and repair equipment

Driving time (minutes) Operation at ambient temperature 25 ℃ Operation at ambient temperature 35 ℃ Existing system The present invention Existing system The present invention 5 25.6 25.8 35.7 35.2 20 38.3 33.1 48.6 40.3 40 47.2 37.5 56.8 43.5 60 52.6 40.2 61.2 45.6 80 54.7 40.3 63.4 46.1

As confirmed in Table 2 above, the heat dissipation effect of the present invention is compared with the heat dissipation effect according to the heat dissipation device by the conventional blower fan 36a. , 5.2 ℃ for 20 minutes, 9.7 ℃ for 30 minutes, 12.4 ℃ for 60 minutes, 14.4 ℃ for 80 minutes, and 0.5 ℃, 20 for 5 minutes at 35 ℃ It was found that 8.3 ° C. for the minute operation, 13.3 ° C. for the 30 minute operation, 15.6 ° C. for the 60 minute operation, and 17.3 ° C. for the 80 minute operation.

As described above, the method of heat dissipation of the refrigerant circulation cycle inspection and repair apparatus for a vehicle according to the present invention has excellent heat dissipation effect in heat dissipation so that the temperature in the housing does not adversely affect the operation of the CPU and the circuit elements. As a result, there was almost no error in CPU processing speed and prosram processing, and the compressor also maintained system performance stably without crashing or losing.

Claims (1)

The temperature sensor (TS) is attached to the surface of the compressor during the cleaning operation by checking and repairing the vehicle's refrigerant circulation cycle that performs the refrigerant recovery, cleaning, vacuum, filling or replenishment processes collectively. Sirocco fan (SF) is installed on the inside of the upper) transfers the sensing value detected by the temperature sensor TS to the CPU, and the CPU compares the set temperature and the sensing value to determine if the sensing temperature value is set. If the value is higher than the value, the Sirocco fan (SF) is operated by the CPU to allow external air to flow between the heat dissipation fins of the condenser 36 through the outside air inlet port 100b, and forcibly discharge the internal air to the outside to allow the compressor and the main. The heat of the CPU or semiconductor placed on the board MB is lowered below the set range, and if the temperature of the sensing value is lower than the set value, the power supplied to the sirocco fan SF is cut off by the CPU. Heat sink in the lock control cycle inspection and maintenance device of the vehicle refrigerant characterized in that.

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