KR20220033741A - Refrigerant Recovery And Charging Device For Vehicle Air Conditioner - Google Patents

Abstract

The present invention provides a refrigerant recovery and charging device for an air conditioner of a vehicle, capable of accurate and convenient recovery and charging works for a refrigerant. According to the present invention, the refrigerant recovery and charging device for an air conditioner of a vehicle includes: a control unit (C); a main body formed as a hollow body, and including an input unit (105) and a display unit (107) on one side; a connection unit (200) exposed to the outside of the main body and connected to an air conditioner nipple for a vehicle; a compressor (300) installed in the main body and inducting a refrigerant accommodated in a vehicle by being connected to the connection unit (200); a waste oil separator (400) installed between the connection unit (200) and the compressor (300) and separating waste oil from the refrigerant transferred to the compressor (300); a condenser (830) installed between the compressor (300) and a recovery tank (800); the recovery tank (800) connected to the compressor (300) by a pipe and storing the refrigerant recovered by the condenser (830); a first scale (850) measuring the weight of the recovery tank (800) and connected to the control unit (C); and an oil container (650) connected to the connection unit (200) by an oil pipe (220). The recovery tank (800) is connected to the connection unit (200) by a refrigerant pipe (240). The weight of the condenser (830) is measured and transferred to a control unit (C) during the process of recovering the refrigerant.

Description

Refrigerant Recovery And Charging Device For Vehicle Air Conditioner

The present invention relates to a refrigerant recovery and charging device for a vehicle air conditioner, and to a refrigerant recovery and charging device for a vehicle air conditioner that is convenient and can accurately recover and charge refrigerant.

In general, an air conditioner is a device that regulates the temperature and humidity of indoor air in summer. In a vehicle air conditioner, refrigerant is sucked in and compressed by a compressor and then circulated in the order of condenser-expansion valve-evaporator-compressor. It lowers the temperature inside the vehicle to a predetermined temperature to make the interior comfortable.

At this time, since the refrigerant of the vehicle air conditioner is emerging as an environmental pollution problem, incineration and treatment are inevitable, so a refrigerant recovery and charging device for the vehicle air conditioner that can be reused by recovering the refrigerant has been developed. A refrigerant recovery and charging device for a vehicle air conditioner is a device that recovers a refrigerant contained in a vehicle and regenerates and charges the recovered refrigerant.

1 is a view showing a conventional device for recovering and charging a refrigerant for a vehicle air conditioner, high and low pressure connection parts 11 and 12 connected to the vehicle, a vacuum pump 20 connected to the connection parts 11 and 12, and An oil sight glass 30, a waste oil separator 40 connected to the oil sight glass 30, an oil separator 50 connected to the waste oil separator 40, and the oil separator 50 A compressor (60) connected between the waste oil separator (40) and operating to recover the refrigerant, a condenser (70) connected to the oil separator (50), and a recovery tank (80) connected to the condenser (70) And, it is composed of a scale (90, electronic scale) installed on the bottom surface of the recovery tank (80).

When the compressor 60 is operated, the refrigerant is sucked into the waste oil separator 40 through the oil sight glass 30 from the high and low pressure valves 11 and 12 connected to the vehicle, and into the waste oil separator 40 The sucked refrigerant is in a state in which the waste oil is separated, and after moisture is filtered by the moisture filter 61 while being recovered to the compressor 60 , the inside and the outside of the oil separator 50 and the inside of the waste oil separator 40 . After being cooled to a liquid by the condenser 70 through , it is recovered to the recovery tank 80 .

The refrigerant recovered to the recovery tank 80 is measured by the scale 90 and the weight of the refrigerant accommodated in the recovery tank 80 is output through a display unit (not shown) provided in the main body. It is possible to determine whether the compressor of the vehicle air conditioner is damaged by visually checking the color of the refrigerant recovered through the oil sight glass 30 .

The gas refrigerant that has passed through the oil separator 50 is compressed in the compressor 60 and changed into a high-temperature and high-pressure gas, and is changed to a liquid refrigerant while passing through the condenser 70 and stored in the recovery tank 80 . .

When the recovery of the refrigerant gas from the vehicle air conditioner is completed, the operation of the compressor 60 is stopped, and the vacuum pump 20 is operated for a predetermined time, so that the inside of the vehicle is changed to a vacuum state. And in a vacuum state, the liquid refrigerant in the recovery tank 80 through the high-pressure valve 11a is transferred to the filter 81, the charging valve 82, the third check valve 83, the high-pressure valve 11a, the filter 11b and It is charged into the inside of the vehicle through the high-voltage connector (11). At this time, the liquid refrigerant is charged into the vehicle through the high-pressure valve 11a while being filtered by the filters 81 and 11b. In addition, the oil filled with the vehicle is stored in the oil tank 10 connected to the high and low pressure valves 11a and 12a. A ventilation hole is formed in the oil tank 10 to facilitate filling when filling the vehicle with oil.

The refrigerant recovery and charging device of the vehicle air conditioner as described above has a structure that measures only the weight of the recovery tank 80 , so the weight of the recovered refrigerant cannot be precisely measured, and the oil is contaminated through the ventilation hole formed in the oil tank 10 . Or there was a problem that the appearance could change.

Korean Patent Laid-Open No. 10-2015-0128637

The present invention has been proposed to solve the above problems, the recovery rate of the refrigerant is high, the recovery of the refrigerant is precisely measured, and since the new oil contained in the oil tank is not exposed to air, there is no fear of absorbing moisture and there is no fear of contamination. , An object of the present invention is to provide a refrigerant recovery and charging device for a vehicle air conditioner in which refrigerant recovery and charging operations are performed precisely and conveniently.

The present invention relates to a control unit, a main body having an input unit and a display unit on one side as a hollow body, a connecting unit exposed to the outside of the main body and connected to a vehicle air conditioner nipple, provided in the main body and connected to the connecting unit and accommodated in the vehicle A compressor for sucking the refrigerant, a waste oil separator provided between the connection part and the compressor to separate waste oil from the refrigerant transferred to the compressor, a condenser provided between the compressor and the recovery tank, and the condenser and the pipe are connected and a recovery tank in which the refrigerant recovered through the condenser is stored, a first scale measuring the weight of the recovery tank and connected to the control unit, and an oil container connected to the connection unit through an oil pipe, wherein the recovery tank includes a refrigerant connected to the connector by a tube; In the process of recovering the refrigerant to the recovery tank, the weight of the condenser is also measured and transmitted to the control unit to provide a refrigerant recovery and charging device for the vehicle air conditioner.

In the above, the recovery tank and the condenser are loaded on the first scale to measure the weight of the recovery tank and the condenser; A part of the pipe connected to the compressor of the condenser is characterized in that it is made of a flexible pipe.

In the above, the weight of the waste oil tank connected to the waste oil separator is measured and further comprising a third scale connected to the control unit, and a second scale measuring the weight of the oil tank and connected to the control unit; In the process of recovering the refrigerant to the recovery tank, the weight of the waste oil tank is also measured and transmitted to the control unit.

In the above, the second scale is installed on a frame provided in the body, and further includes an oil barrel case which is a hollow body to which the upper part of the oil barrel is coupled, and the oil barrel case includes a hollow case connection part connected to the oil pipe. have; The oil tank is made of a material that shrinks, and when oil is sucked from the oil tank and supplied to the vehicle air conditioner through the connection part, the oil tank is contracted; The oil pipe is characterized in that it consists of a flexible pipe.

In the above, it characterized in that it further comprises a vacuum pump provided in the main body and connected to the connection part to vacuum the space in which the refrigerant is charged.

The refrigerant recovery and charging device for a vehicle air conditioner according to the present invention has the effects of precisely measuring and measuring the refrigerant recovery, preventing oil contamination, and performing the refrigerant recovery and charging operation precisely and conveniently.

1 is a schematic diagram showing a refrigerant recovery and charging device of a conventional vehicle air conditioner,
2 is a schematic diagram showing a refrigerant recovery and charging device for a vehicle air conditioner according to the present invention;
3 is a view to explain the charging process in the refrigerant recovery and charging device of the vehicle air conditioner according to the present invention,
Figure 4 is an enlarged view of the circled portion of Figure 2,
5 is a schematic configuration diagram of a refrigerant recovery and charging device for a vehicle air conditioner according to the present invention.

Hereinafter, a refrigerant recovery and charging device for a vehicle air conditioner according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic diagram illustrating a refrigerant recovery and charging device for a vehicle air conditioner according to the present invention, FIG. 3 is a diagram illustrating a charging process in the refrigerant recovery and charging device for a vehicle air conditioner according to the present invention, and FIG. It is an enlarged view of the circled portion of FIG. 2, and FIG. 5 is a schematic configuration diagram of a refrigerant recovery and charging device for a vehicle air conditioner according to the present invention.

The apparatus for recovering and charging a refrigerant for a vehicle air conditioner according to the present invention is a device for recovering the refrigerant contained in the vehicle air conditioner, regenerating the recovered refrigerant and charging the vehicle. However, it should be noted that the refrigerant recovery and charging device of the vehicle air conditioner according to the present invention can be applied to the air conditioner of other devices other than the vehicle air conditioner.

The refrigerant recovery and charging apparatus of the present invention includes a pipe, a plurality of valves, a control unit (C), a compressor (300), a waste oil separator (400), a water filter (500), and a gas-liquid separator (600) , a waste oil tank 700 , a recovery tank 800 , a vacuum pump 900 , and an oil tank 650 . The refrigerant recovery and charging device of the present invention is exposed to the outside of the main body and includes a connection part 200 connected to the vehicle air conditioner nipple.

The above configuration is provided in the main body (not shown). The body may be made of a metal such as steel as a hollow body. The main body is provided with an input unit 105 for inputting a user's command, and a display unit 107 . The display unit 107 is provided to be exposed to the outside of the main body.

As shown in FIG. 5 , the plurality of valves, a weight sensing unit that is a plurality of scales, a compressor 300 , an input unit 105 , and a display unit 107 are connected to the control unit (C). A transceiver is connected to the control unit C to communicate with an external device (eg, a smart phone).

The compressor 300 is provided in the main body and is connected to the connection part 200 to suck the refrigerant contained in the vehicle during operation. A waste oil separator 400 for separating waste oil from the refrigerant transferred to the compressor 300 is provided between the connection part 200 and the compressor 300 . A condenser 830 is provided between the compressor 300 and the recovery tank 800, and the recovery tank 800 is connected to the condenser 830 through a pipe to store the refrigerant recovered through the condenser 830. do. A first scale 850 that is connected to the control unit C and measures the weight of the recovery tank 800 and transmits the measurement result to the control unit C is provided. It is provided in the oil tank 650 connected to the connection part 200 by the oil pipe 220 . The recovery tank 800 is also connected to the connection unit 200 through a refrigerant pipe 240 .

In the process of recovering the refrigerant to the recovery tank 800 in the refrigerant recovery and charging apparatus of the present invention according to the present invention, the weight of the condenser 830 is also measured and transmitted to the control unit C. Conventionally, since the refrigerant recovery amount was calculated by measuring only the weight of the recovery tank 800, the precise recovery amount could not be calculated because the refrigerant remaining in the condenser 830 was not included, but in the present invention, the weight of the condenser 830 is also measured. Therefore, the weight of the recovered refrigerant can be precisely measured, and the charging amount can also be precisely charged.

In the refrigerant recovery and charging apparatus of the present invention according to the present invention, the recovery tank 800 and the condenser 830 are loaded together on the first scale 850, and the weights of the recovery tank 800 and the condenser 830 are measured. . At least a part of the condenser connection pipe 831 of the condenser 830 connected to the compressor 300 is a flexible pipe (eg, silicone rubber pipe). Accordingly, an error in the measurement of the weight of the condenser 830 due to the connected pipe is prevented or minimized.

The weight of the waste oil tank 700 connected to the waste oil separator 400 is measured, and a third scale 750 connected to the control unit is provided. The third scale 750 is provided in the body, and a waste oil tank 700 is installed on the third scale 750 . In the process of recovering the refrigerant to the recovery tank 800 , the weight of the waste oil tank 700 is also measured and transmitted to the control unit (C).

It measures the weight of the oil tank 650 and further includes a second scale 660 connected to the control unit (C). The second scale 660 is installed on the frame 101 provided in the body. The oil barrel 650 is provided with an upper portion coupled to the oil barrel case 651 . The oil barrel case 651 is a hollow body and is connected to the lower part of the second scale 660 by a connection bracket 103 . The oil barrel case 651 has a hollow case connection part 6511 connected to the oil pipe 220 at an upper portion. The weight of the oil barrel case 651 and the oil barrel 650 is transmitted to the second scale 660 through the connection bracket 103 , and the weight change of the oil barrel 650 is measured by the second scale 660 . . At least a portion of the oil pipe 220 is made of a flexible pipe so that the weight of the oil tank 650 is precisely measured by the second scale 660 .

According to the refrigerant recovery and charging device of the vehicle air conditioner according to the present invention, the weight change of the recovery tank 800 and the condenser 830 is measured during the recovery process, and the measured result is transmitted to the controller C. In addition, the amount of recovered waste oil measured by the third scale 750 is measured, and the measured result is transmitted to the controller (C). Therefore, when the recovery is completed and charged, the refrigerant and oil can be precisely metered and charged, and the recovery and charging process is continuously performed with an input command through the input unit 105, so that the recovery and charging can be carried out precisely and easily. there is. Then, the work result is displayed on the display unit 107, and is transmitted to a smart phone such as a user or a client through the transceiver, so that the work progress and results can be checked in real time.

Hereinafter, the operation of the refrigerant recovery and charging device of the vehicle air conditioner according to the present invention according to the present invention will be described in more detail.

A plurality of pipes provided in the refrigerant recovery and charging device of the vehicle air conditioner of the present invention include a first pipe 210, a second pipe 230, a third pipe 250, a fourth pipe 270, A fifth pipe 910 , a sixth pipe 290 , a seventh pipe 410 , an eighth pipe 430 , a ninth pipe 450 , a tenth pipe 510 , and an 11th pipe It consists of a pipe 310 , a twelfth pipe 610 , a thirteenth pipe 490 , an oil pipe 220 , and a refrigerant pipe 240 . The oil pipe 220 may be branched and connected to a plurality of oil barrels 650 . The refrigerant pipe 240 is branched (refrigerant branch pipe, 240-1) and is respectively connected to each connection unit 200 .

The plurality of valves provided in the refrigerant recovery and charging device of the vehicle air conditioner of the present invention may be formed of a solenoid valve. The plurality of valves are connected to the control unit (C) and operated according to the command of the control unit (C). A plurality of valves provided in the refrigerant recovery and charging device of the vehicle air conditioner of the present invention include a first valve 211 , a second valve 231 , a third valve 271 , and a fourth valve 911 , , a fifth valve 291 , a sixth valve 431 , a seventh valve 311 , oil pipe valves 221 and 223 , and refrigerant pipe valves 243 and 245 .

As shown in FIG. 2 , the first pipe 210 is provided with a connection part 200 at one end. A first valve 211 is provided in the first pipe 210 . The connection part 200 of the first pipe 210 is connected to the vehicle air conditioner.

The second pipe 230 is provided with a connection part 200 at one end. A second valve 231 is provided in the second pipe 230 . The connection part 200 of the second pipe 230 is connected to the vehicle air conditioner.

The third pipe 250 is provided with the other end of the first pipe 210 and the other end of the second pipe 230 connected to both ends, respectively.

The fourth pipe 270 is provided with one end connected to the connection part of the first pipe 210 and the third pipe 250 , and the other end connected to the suction part of the vacuum pump 900 . A third valve 271 is provided in the fourth pipe 270 .

The fifth pipe 910 is provided with one end connected to the outlet of the vacuum pump 900 . A fourth valve 911 is provided in the fifth pipe 910 .

The sixth pipe 290 is provided with one end connected to the connection part of the second pipe 230 and the third pipe 250 and the other end connected to the other end of the fifth pipe 910 . A fifth valve 291 is provided in the sixth pipe 290 . In the above, the fifth pipe 910 is not provided, and the sixth pipe 290 may extend to the seventh pipe 410 .

One end of the seventh pipe 410 is connected to the connection part of the fifth pipe 910 and the sixth pipe 290 , and the other end is connected to the waste oil separator 400 . In the above, the fifth pipe 910 is not provided, and the seventh pipe 410 may be an extension pipe of the sixth pipe 290 .

The eighth pipe 430 is provided with one end connected to the waste oil separator 400 and the other end connected to the waste oil tank 700 . The sixth valve 431 is provided in the eighth pipe 430 .

The ninth pipe 450 is provided with one end connected to the waste oil separator 400 and the other end connected to the moisture filter 500 .

The tenth pipe 510 is provided with one end connected to the moisture filter 500 and the other end connected to the suction unit of the compressor 300 .

The eleventh pipe 310 is provided with one end connected to the discharge part of the compressor 300 and the other end connected to the gas-liquid separator 600 . A seventh valve 311 is provided in the eleventh pipe 310 .

The twelfth pipe 610 is provided with one end connected to the gas-liquid separator 600 and the other end connected to a cooling pipe 470 provided inside the waste oil separator 400 .

The thirteenth pipe 490 is provided with one end connected to the cooling pipe 470 and the other end connected to the recovery tank 800 .

A condenser 830 is installed in the 13th pipe 490 between the recovery tank 800 and the waste oil separator 400 . As shown in FIG. 2 , the recovery tank 800 and the condenser 830 are loaded on the first scale 850 , and the weights of the recovery tank 800 and the condenser 830 are measured. The condenser 830 is installed on a scale (not shown), so that the weight change of the condenser 830 can be measured.

The waste oil separator 400 is provided with a hollow body. The seventh pipe 410 , the eighth pipe 430 , and the ninth pipe 450 are connected to the waste oil separator 400 . The refrigerant mixed with oil sucked from the vehicle air conditioner through the seventh pipe 410 in the waste oil separator 400 is separated into waste oil and refrigerant. The separated waste oil is accumulated in the waste oil separator 400 , and the separated refrigerant is moved to the ninth pipe 450 . A cooling pipe 470 is provided inside the waste oil separator 400 .

A twelfth pipe 610 and a thirteenth pipe 490 are connected to the cooling pipe 470 . The cooling tube 470 is formed as a tube body and is provided in a spiral shape. As it passes through the inside of the waste oil separator 400 through the cooling pipe 270, heat exchange is performed to lower the temperature of the refrigerant.

The ninth pipe 450 and the tenth pipe 510 are connected to the moisture filter 500 . The moisture of the refrigerant is sucked in the moisture filter (500).

The tenth pipe 510 and the eleventh pipe 310 are connected to the compressor 300 . In the compressor 300 , the refrigerant is in a high pressure state. Oil and refrigerant are easily separated in the gas-liquid separator 600 by the compressor 300 .

The eleventh pipe 310 and the twelfth pipe 610 are connected to the gas-liquid separator 600 . From the refrigerant flowing into the gas-liquid separator 600 , a trace amount of oil remaining in the refrigerant is separated.

The eighth pipe 430 is connected to the waste oil tank 700 . In the waste oil tank 700 , the waste oil accumulated in the waste oil separator 400 is recovered.

The thirteenth pipe 490 is connected to the recovery tank 800 . In the recovery tank 800 , the refrigerant whose temperature is lowered due to the cooling pipe 470 is collected.

The first valve 211, the second valve 231, the third valve 271, the fourth valve 911, the fifth valve 291, and the sixth valve in the control unit (C) 431 , the seventh valve 311 , the compressor 300 , and the vacuum pump 900 are connected to control the operation according to the progress process.

A refrigerant recovery method using the refrigerant recovery and charging device of the present invention will be described.

In order to recover the refrigerant accommodated in the vehicle air conditioner, the first pipe 210 and the second pipe 230 are connected to the vehicle air conditioner through a connection terminal.

The refrigerant recovery method using the refrigerant recovery and charging device consists of a recovery step (ST-110) and an additional recovery step (ST-120).

In the recovery step (ST-110), the compressor 300 is operated to recover the refrigerant.

The compressor 300 sucks the refrigerant accommodated in the vehicle air conditioner through the first pipe 210 and the second pipe 230 .

In the recovery step ST-110, the first valve 211, the second valve 231, the fifth valve 291, and the seventh valve 311 are opened from the control unit C, and the remaining valves are closed. The compressor 300 is controlled to operate.

In the recovery step (ST-110), the compressor 300 is operated after opening and closing each valve, and the refrigerant is sucked through the first pipe 210 and the second pipe 230 connected to the vehicle air conditioner (ST- 111).

The sucked refrigerant flows into the waste oil separator 400 through the third pipe 250 , the sixth pipe 290 , and the seventh pipe 410 . The introduced refrigerant is separated into waste oil and refrigerant in the waste oil separator 400 (ST-112).

The refrigerant that has passed through the waste oil separator 400 flows into the ninth pipe 450 and passes through the water filter 500 to remove moisture present in the refrigerant (ST-113).

The refrigerant that has passed through the moisture filter 500 is moved to the compressor 300 through the tenth pipe 510 . In the compressor 300 , the refrigerant becomes high pressure. The refrigerant that has passed through the compressor 300 is moved to the gas-liquid separator 600 through the eleventh pipe 310 . In the gas-liquid separator 600, a small amount of oil remaining in the refrigerant is separated (ST-114).

The refrigerant that has passed through the gas-liquid separator 600 is moved to the cooling pipe 470 through the twelfth pipe 610 . It passes through the inside of the waste oil separator 400 by the cooling pipe 470 and heat exchanges to lower the temperature of the refrigerant (ST-115).

The refrigerant whose temperature has been lowered through the cooling pipe 470 is collected into the recovery tank 800 through the thirteenth pipe 490 (ST-116).

After the recovery step ST-110, the additional recovery step ST-120 begins.

In the additional recovery step (ST-120), the vacuum pump 900 is operated to suck the refrigerant.

The vacuum pump 900 sucks the refrigerant accommodated in the vehicle air conditioner through the first pipe 210 and the second pipe 230 .

In the additional recovery step ST-120, the first valve 211, the second valve 231, and the third valve 271 are opened from the control unit C, and the vacuum pump 900 is closed while the remaining valves are closed. ) is controlled to operate.

After each valve is opened and closed in the additional recovery step (ST-120), the vacuum pump 900 is operated, and the refrigerant is sucked through the first pipe 210 and the second pipe 230 connected to the vehicle air conditioner ( ST-121).

At this time, the vacuum pump 900 absorbs the refrigerant at a pressure lower than that of the compressor 300 .

When the refrigerant is sucked in, the fourth valve 911 and the seventh valve 311 are opened from the control unit C, and the compressor 300 is controlled so that the remaining valves are closed.

The compressor 300 is operated and flows into the waste oil separator 400 through the fourth pipe 911 and the seventh pipe 410 . The sucked refrigerant is separated into waste oil and refrigerant in the waste oil separator 400 (ST-122).

The refrigerant that has passed through the waste oil separator 400 flows into the ninth pipe 450 and passes through the water filter 500 to remove moisture present in the refrigerant (ST-123).

The refrigerant that has passed through the moisture filter 500 is moved to the compressor 300 through the tenth pipe 510 . In the compressor 300 , the refrigerant becomes high pressure. The refrigerant that has passed through the compressor 300 is moved to the gas-liquid separator 600 through the eleventh pipe 310 . In the gas-liquid separator 600, a small amount of oil remaining in the refrigerant is separated (ST-124).

The refrigerant passing through the gas-liquid separator 600 is moved to the cooling pipe 470 inside the waste oil separator 400 through the twelfth pipe 610 . It passes through the inside of the waste oil separator 400 by the cooling tube 470 and heat exchanges to lower the temperature of the refrigerant (ST-125).

The refrigerant whose temperature is lowered through the cooling pipe 470 is collected into the recovery tank 800 through the thirteenth pipe 490 (ST-126).

After the recovery of the refrigerant is finished, the waste oil accumulated in the waste oil separator 400 is opened to the sixth valve 431 and is discharged to the waste oil tank 700 through the eighth pipe 430 . is emitted

The refrigerant recovery method using the refrigerant recovery and charging device consists of a recovery step (ST-110) and an additional recovery step (ST-120). The refrigerant recovery method goes through two refrigerant recovery steps, so that the recovery rate is improved compared to the existing refrigerant recovery method.

In addition, in the step (ST-121) in which the refrigerant is sucked in the additional recovery step (ST-120), since the vacuum pump 900 is driven, the suction power of the refrigerant is improved than that of the compressor 300 .

Therefore, the refrigerant is recovered by using the vacuum pump 900 and the refrigerant recovery rate is further improved, and additional costs are saved when the recovered refrigerant is reused by increasing the recovery rate, and environmental destruction by the refrigerant is reduced. has a preventive effect.

In a state where recovery is completed through the above process and the vacuum is made, the oil pipe valve 221 is selectively opened/closed under the control of the controller (C), and the refrigerant pipe valve 241 and the refrigerant branch pipe 240-1 ), the opening and closing of the branch pipe valve 243 is controlled, so that the oil in the oil tank 650 is selectively vacuum sucked, and the refrigerant in the recovery tank 800 is charged with the automobile air conditioner. The measured value of the second scale 660 on which the weight of the oil tank 650 is measured is transmitted to the control unit C, and the opening and closing of the oil pipe valve 221 is controlled according to the transmitted result. When oil is vacuum sucked from the oil tank 650, the oil tank 650, which is shaped like a corrugated pipe and made of a flexible material, is contracted. Therefore, the oil is vacuum sucked even in a state where no vents are formed in the oil tank 650 , and it operates in a state in which the external atmosphere and new oil are blocked, so that moisture inflow or contamination does not occur.

Up to now, the refrigerant recovery and charging device of the vehicle air conditioner according to the present invention has been described with reference to the embodiment shown in the drawings, but this is only an example, and any person skilled in the art can make various modifications and equivalent other embodiments therefrom. will understand Accordingly, the true technical protection scope should be determined by the technical spirit of the appended claims.

100: refrigerant recovery and charging device 300: compressor
400: waste oil separator 500: moisture filter
600: gas-liquid separator 700: waste oil tank
800: recovery tank 900: vacuum pump

Claims (5)

A control unit (C), a body having an input unit 105 and a display unit 107 on one side as a hollow body, a connection unit 200 exposed to the outside of the main body and connected to a vehicle air conditioner nipple, and provided in the main body The compressor 300 is connected to the connection part 200 and sucks the refrigerant contained in the vehicle, and the waste oil is provided between the connection part 200 and the compressor 300 and transferred to the compressor 300. The separated waste oil separator 400, the condenser 830 provided between the compressor 300 and the recovery tank 800, and the condenser 830 are connected by a pipe to the refrigerant recovered through the condenser 830 A recovery tank 800 in which is stored, a first scale 850 that measures the weight of the recovery tank 800 and is connected to the control unit C, and an oil pipe 220 that is connected to the connection unit 200 an oil tank 650, wherein the recovery tank 800 is connected to the connection unit 200 through a refrigerant pipe 240;
Refrigerant recovery and charging device for vehicle air conditioner, characterized in that the weight of the condenser (830) is also measured and transmitted to the controller (C) in the process of recovering the refrigerant to the recovery tank (800). The method according to claim 1, wherein the recovery tank (800) and the condenser (830) are loaded on the first scale (850) to measure the weights of the recovery tank (800) and the condenser (830); A refrigerant recovery and charging device for a vehicle air conditioner, characterized in that a portion of the condenser (830) side of the pipe connected to the compressor (300) is made of a flexible pipe. According to claim 1, wherein the weight of the waste oil tank (700) connected to the waste oil separator (400) is measured, the third scale (750) connected to the control unit, and the weight of the oil tank (650) are measured and the control unit ( C) further comprising a second scale 660 connected to; Refrigerant recovery and charging device for vehicle air conditioner, characterized in that in the process of recovering the refrigerant to the recovery tank (800), the weight of the waste oil tank (700) is also measured and transmitted to the control unit (C). 4. The second scale according to claim 3, wherein the second scale (660) is installed on the frame (101) provided in the body, and is a hollow body to which the upper part of the oil tank (650) is coupled, and is a connecting bracket (103). It further includes an oil barrel case 651 connected to (660), wherein the oil barrel case 651 has a hollow case connection part (660) connected to the oil pipe (220); The oil tank 650 is made of a contracting material, and when oil is sucked from the oil tank 650 and supplied to the vehicle air conditioner through the connection unit 200, the oil tank 650 is contracted; The oil pipe 220 is a refrigerant recovery and charging device for a vehicle air conditioner, characterized in that made of a flexible pipe. 5. The refrigerant recovery of the vehicle air conditioner according to any one of claims 1 to 4, further comprising a vacuum pump (800) provided in the main body and connected to the connection part (200) to vacuum the space in which the refrigerant is charged. and charging devices.

Images