KR101570388B1 - Refrigerant injection and collection apparatus - Google Patents

Abstract

The present invention relates to an automotive air conditioner, A low pressure connection part connected to the automobile air conditioner; A first refrigerant storage part connected to the high pressure connection part and the low pressure connection part and storing the first refrigerant; A first refrigerant storage part connected to the high pressure connection part and the low pressure connection part and storing a second refrigerant; A recovery unit for storing the first refrigerant or the second refrigerant in the first refrigerant storage unit or the second refrigerant storage unit by flowing, vaporizing, compressing, and heat-exchanging the first refrigerant or the second refrigerant through different flow paths; And a charging unit for supplying the first refrigerant or the second refrigerant from the first refrigerant reservoir or the second refrigerant reservoir to the high pressure connection unit and the low pressure connection unit via different flow paths, It provides one air conditioner gas injection and recovery equipment.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an air conditioner gas injection and recovery apparatus equipped with a dual gas tank,

The present invention relates to an equipment (R-1234YF) for air-conditioner gas injection and recovery with dual gas tanks, and more particularly to a dual gas tank capable of independently injecting and recovering two types of refrigerant into an air- And more particularly, to an air conditioner gas injection and recovery equipment provided on an electronic balance.

Generally, in recent years, a wide range of small refrigerators such as air conditioners, refrigerators, and water purifiers have been widely used in automotive air conditioners or households. In order to dispose, repair, or repair the refrigerant gas, Is emerging as an important environmental problem.

In particular, refrigerants based on chlorofluorocarbons (CFC) such as R-11 and R-12 and chlorofluoro-hydrocarbons (HCFC) such as R-123 and R-22 are the main causes of ozone layer destruction and global warming. Hydrofluorocarbons (HFC) -based refrigerants are defined as substances that cause global warming, and they must be fully managed to prevent them from leaking into the atmosphere by properly recovering them.

For example, when a vehicle is scrapped, air conditioner refrigerant must first be recovered. However, up to now, there has been a problem in that a junkyard or a garage having a facility capable of recovering various kinds of air conditioner refrigerants (new refrigerant, old refrigerant, Is very rare. Most of them have single-type refrigerant recovery and injection equipment and it is difficult to provide them according to the kind of refrigerant. As a result, the refrigerant is frequently discharged to the atmosphere during the scrapping and repair and maintenance processes.

Such a problem is also true in the case of disposing and repairing other small refrigerators such as refrigerators and domestic air conditioners.

Accordingly, in order to solve such a problem, a refrigerant recovery device capable of efficiently recovering refrigerant from a plurality of small refrigerators such as a car air conditioner, a household air conditioner, a refrigerator, and a water purifier has been disclosed.

However, the conventional refrigerant recovery apparatus is provided with a first refrigerant recovery tank for primarily cooling the refrigerant recovered therein and a second refrigerant recovery tank for storing the refrigerant cooled in the first refrigerant recovery tank, There is a problem that the collection device is large, the equipment cost is high, and inefficient in transportation and storage.

In addition, the conventional refrigerant recovery apparatus is a system in which the refrigerant primarily cooled in the first refrigerant recovery tank is secondarily stored in the second refrigerant recovery tank, and the refrigerant that has not been cooled is stored in the second refrigerant recovery tank, There was a problem that it could not be stored efficiently. Particularly, the refrigerant stored in the second refrigerant recovery tank is not recirculated back to the first refrigerant recovery tank, and thus the refrigerant can not be efficiently recovered and stored.

In addition, in the conventional refrigerant recovery apparatus, since the refrigerant is recovered through one refrigerant recovery flow path and then the refrigerant is subjected to the liquefaction treatment, the two types of refrigerant can not be recovered from each other, and the convenience of use of the refrigerant recovery apparatus is extremely reduced.

A prior art related to the present invention is Korean Patent Laid-Open Publication No. 10-2000-0058830 (Oct.

The present invention provides an air conditioner gas injection and recovery equipment having a dual gas tank capable of independently injecting and recovering two kinds of refrigerant into an air conditioner of an automobile.

In a preferred embodiment, the present invention provides a vehicle air conditioner comprising: a high-low-voltage connector connected to an automobile air conditioner; A first refrigerant storage part connected to the high pressure connection part and the low pressure connection part and storing the first refrigerant; A second refrigerant storage part connected to the high pressure connection part and the low pressure connection part and storing a second refrigerant; A recovery unit for storing the first refrigerant or the second refrigerant in the first refrigerant storage unit or the second refrigerant storage unit by flowing, vaporizing, compressing, and heat-exchanging the first refrigerant or the second refrigerant through different flow paths; And a charging unit for supplying the first refrigerant or the second refrigerant from the first refrigerant reservoir or the second refrigerant reservoir to the high pressure connection unit and the low pressure connection unit via different flow paths, It provides one air conditioner gas injection and recovery equipment.

The air conditioner gas injection and recovery equipment further includes an oil supply unit.

The oil supply unit may include a plurality of oil storage tanks for storing different refrigerant oils and an oil supply unit for independently supplying different refrigerant oil from the plurality of oil storage tanks to the high pressure connection portion and the low pressure connection portion desirable.

Wherein the recovery unit includes a heat exchange unit for vaporizing or heat-exchanging the first refrigerant or the second refrigerant, a compression unit for compressing the first refrigerant or the second refrigerant, and a compression unit for compressing the first refrigerant or the second refrigerant, A flow line for connecting the heat exchange unit and the compression unit to flow the vaporized first refrigerant or the second refrigerant to the compression unit, A pair of first discharge lines connected to the heat exchanger and connected to the heat exchanger and independently flowing the compressed first refrigerant or the second refrigerant to the heat exchanger, 2 refrigerant storage unit, and the first refrigerant or the second refrigerant heat-exchanged in the heat exchange unit independently flows into the first refrigerant storage unit or the second refrigerant storage unit, Wherein the key selectively opens and closes a pair of second discharge lines, the pair of first discharge lines and the pair of second discharge lines so that the first refrigerant or the second refrigerant selectively flows into the recovery- .

Preferably, the first refrigerant storage unit and the second refrigerant storage unit are respectively provided with a recovery detector for detecting the recovery of the recovered first refrigerant or the second refrigerant.

The charging unit may include a first charging line for connecting the first refrigerant reservoir to the high pressure connection unit and the low pressure connection unit to form a flow path for the first refrigerant and a second charging line for connecting the second refrigerant reservoir to the high pressure connection unit, A second charging line for connecting the low-pressure connection portion to form a flow path for the second refrigerant, and a charge side switching portion for opening and closing the first charging line and the second charging line.

The present invention has the effect of independently injecting and recovering two kinds of refrigerant into an air conditioner of an automobile.

Further, the present invention has the effect of reducing the size of the apparatus by commonly using the recovery line when recovering and charging a large number of refrigerants.

Further, in the present invention, when two refrigerants are used, only one refrigerant is used, and when another refrigerant is used, the refrigerant in use can be completely recovered, and the in-line cleaning can be performed.

Further, the present invention is characterized in that the electronic balance for sensing the weight of the first refrigerant storage tanks and the second refrigerant storage tanks is provided with a plurality of electronic scales, and the first and second refrigerant storage tanks Put together and use two weights. However, in recognizing the weight value of the PCB on the PCB, the electronic balance value is cumulatively calculated when only one refrigerant is used, and when the mode is switched to another type of refrigerant, the weight of the refrigerant amount used is stored in the EEPROM, to be.

FIG. 1 is a configuration diagram showing an air conditioner gas injection and recovery apparatus equipped with the dual gas tank of the present invention.
2 is a view showing a refrigerant recovery operation.
3 is a view showing a refrigerant charging operation.

Hereinafter, an air conditioner gas injection and recovery equipment having dual gas tanks according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a view showing an apparatus for air conditioner gas injection and recovery with dual gas tanks according to the present invention. FIG. 2 is a view showing a refrigerant recovery operation, and FIG. 3 is a view showing a refrigerant charging operation.

Referring to FIG. 1, an air conditioner gas injection and recovery equipment having dual gas tanks according to the present invention includes a high pressure connection part 100, a low pressure connection part 200, a first refrigerant storage part 310, A recovering unit 400, and a charger 500. [0033]

The high-voltage connecting unit 100, the low-voltage connecting unit 200,

The high-voltage connection part 100 is connected to the high-voltage side connection end of the automobile air conditioner.

The low-voltage connection part 200 is connected to the low-voltage side connection end of the automobile air conditioner.

The high pressure connection part 100 and the low pressure connection part 200 are connected to the heat exchange part 410 through a recovery line.

The recovery line is composed of first and second recovery lines 421 and 422 and a common line 423.

The first recovery line 421 is connected to the high-pressure connection part 100 to guide the flow of the refrigerant.

The second recovery line 422 is connected to the low-pressure connection part 200 to guide the flow of the refrigerant.

The ends of the first and second recovery lines 421 and 422 are connected to the common line 423 and the common line 423 is connected to the heat exchange unit 410.

The common line 423 is provided with an S18 valve.

The first recovery line 421 is provided with a plurality of first opening and closing valves S1 and S2 and the second recovery line 422 is provided with a plurality of second opening and closing valves S6 and S7.

Further, the first branch line 471 is branched to the first collection line 421, and the second branch line 472 branches to the second collection line.

The first and second branch lines 471 and 472 are connected to the pressure sensor P and S3 valves and S5 valves for opening and closing the lines are installed in the first and second branch lines 471 and 472, respectively.

The heat exchanger 410 and the compression unit 460 are connected by a flow line 430.

The flow line 430 is a line through which the first refrigerant or the second refrigerant vaporized in the heat exchange unit 410 flows to the compression unit.

A filter (DF) is installed on the flow line (430).

The compression unit 460 and the heat exchange unit 410 are connected through a pair of first discharge lines.

The 1-1 discharge line 441, which is one of the pair of first discharge lines, is connected to the heat exchange unit 410 through the U14 passage. And the S 1-1 valve is installed in the 1-1 discharge line 441.

The other one of the pair of first discharge lines, the first and second discharge lines 442, is connected to the heat exchanging unit 410 through the U15 case. An S14 valve is installed in the first-second discharge line 442.

Further, the heat exchanging unit 410 and the first and second refrigerant storage units 310 and 320 are connected through a pair of second discharge lines.

The second discharge line 451, which is one of the pair of second discharge lines, connects the heat exchange unit 410 and the first refrigerant storage unit 310.

The other one of the pair of second discharge lines, the second discharge line 452, connects the heat exchange unit 410 and the second refrigerant storage unit 320.

The first refrigerant storage part 310 and the second refrigerant storage part 320 may be formed of tanks, and the first refrigerant and the second refrigerant may be collected and stored, respectively.

The above-described valves can be used as a return-side opening and closing part.

Meanwhile, the charging unit 500 according to the present invention includes a first charging line 510, a second charging line 520, and a charging side switching unit.

The first charge line 510 is connected to the first recovery line 421 through the S4 valve.

The end of the first charging line 510 is connected to the first refrigerant reservoir 310 and the S10 valve is installed on the first charging line 510.

One end of the second charging line 520 is connected to the pressure sensor P and the other end of the second charging line 520 is connected to the second refrigerant storage part 320.

An S12 valve is provided on the second charging line 520.

A vacuum pump VP is provided at an end of the vacuum branch line 521 and the vacuum branch line 521 is connected to the second branch line ), An S8 valve is installed.

The above-described valves may be charge side opening and closing portions.

The air conditioner gas injection and recovery equipment of the present invention further includes an oil supply unit.

The oil supply unit 600 includes a plurality of oil storage tanks 610 for storing different refrigeration oils and a plurality of oil storage tanks 610 for supplying different refrigerating oils to the high pressure connection unit 100 and the low pressure connection unit 200 to the oil supply unit.

The oil storage tank is composed of first and second oil storage tanks 610 and 620.

The oil supply unit includes a first oil supply unit and a second oil supply unit.

The first oil supply unit includes a first oil supply line 611 branched from the first charge line 510 and an S9 valve installed on the first oil supply line 611.

Here, the first oil storage tank 610 is connected to the end of the first oil supply line 611.

The second oil supply unit includes a second oil supply line 621 branched from the second charge line 520 and an S11 valve installed on the second oil supply line 621.

Here, the second oil storage tank 620 is connected to the end of the second oil supply line 621.

Next, the operation of the air conditioner gas injection and recovery equipment having the dual gas tank having the above configuration will be described.

Recovery operation (first refrigerant storage)

When the first refrigerant is recovered, the high-pressure connection part 100 and the low-pressure connection part 200 are connected to the automobile air conditioner.

Then, simultaneously with opening S1, S2, S6 and S7 valves, S4 valve is opened.

The pressure sensor P installed at the end of the first branch line 471 senses the pressure due to the flow of the first refrigerant flowing into the first and second recovery lines 421 and 422.

Subsequently, the first refrigerant flows along the common line 423, passes through the S18 valve, is vaporized in the U16 communicating heat exchanger 410, and the vaporized first refrigerant is filtered while passing through the U17 filter DF.

The filtered first refrigerant then flows into the compression section 460 and is compressed in the compression section 460 and then flows along the 1-1 discharge line 441 to enter the U14 passage and pass through U12 do.

The first refrigerant passing through U12 enters the heat exchange unit 410, is heat-exchanged by a heat exchange coil provided inside the heat exchange unit 410, and then flows along the second-1 discharge line 451 And is recovered and stored in the first refrigerant storage unit 310.

Next, the recovery detector 480 installed in the first refrigerant storage part 310 may sense the recovery amount of the first refrigerant recovered as described above.

The recovery sensor 480 is a device such as an electronic balance capable of measuring a weight.

Recovery operation (second refrigerant storage)

Referring to FIGS. 1 and 2, when the second refrigerant is recovered, the high-pressure connection part 100 and the low-pressure connection part 200 are connected to the automobile air conditioner.

Then, simultaneously with opening S1, S2, S6 and S7 valves, S4 valve is opened.

The pressure sensor P installed at the end of the first branch line 471 senses the pressure due to the flow of the second refrigerant flowing to the first and second recovery lines 421 and 422.

Subsequently, the second refrigerant flows along the common line 423, passes through the S18 valve, is vaporized in the U16 communicating heat exchanger 410, and the vaporized second refrigerant is filtered while passing through the U17 filter DF.

The filtered second refrigerant then flows into the compression section 460 and is compressed in the compression section 460 and then flows along the first-second discharge line 442 to enter the U14 passage and pass through U13 do.

The second refrigerant that has passed through U13 enters the heat exchange unit 410 and is heat-exchanged by the heat exchange coil provided inside the heat exchange unit 410 and then flows along the second-2 discharge line 452 And is recovered and stored in the second refrigerant storage unit 320.

Then, the recovery detector 480 installed in the second refrigerant storage part 320 may sense the recovery amount of the second refrigerant recovered as described above.

Vacuum operation

The high-voltage connecting portion 100 and the low-voltage connecting portion 200 are connected to the automobile air conditioner.

Then, simultaneously with opening S1, S2, S6 and S7 valves, S4 valve is opened.

The pressure sensor P installed at the end of the first branch line 471 senses a pressure due to the flow of the first refrigerant or the second refrigerant flowing into the first and second recovery lines 421 and 422.

Then, the S8 valve is opened, and the vacuum pump VP is driven to form a vacuum.

Charging operation (first refrigerant storage portion)

1 and 3, when the first refrigerant is filled, the high-voltage connection part 100 and the low-voltage connection part 200 are connected to the automobile air conditioner.

After the first refrigerant stored in the first refrigerant storage part 310 passes through the S10 valve and the U6 valve, the low pressure fill valves S3 and U3 and the high pressure fill valves S5 and U4 are opened, Can be injected through the recovery lines 421, 422.

Here, the amount of the injected gas is stopped when the target amount of injection is reached according to the measured amount in the recovery detector 480 installed in the first refrigerant reservoir 310, thereby closing the valves.

Charging operation (second refrigerant storage portion)

When charging the second refrigerant, the high-voltage connection part 100 and the low-voltage connection part 200 are connected to the automobile air conditioner.

The first refrigerant stored in the second refrigerant reservoir 320 is discharged through the S12 valve and the U7 valve and then the low pressure charging valves S3 and U3 and the high pressure charging valves S5 and U4 are opened, Can be injected through the recovery lines 421, 422.

Here, the amount to be injected, when the target amount of injection is reached according to the measured amount in the recovery sensor 480, closes the valves to stop the injection operation.

Freezing oil injection (first oil)

When the first oil is injected, the high-pressure connection part 100 and the low-pressure connection part 200 form a vacuum as described above in the state of being connected to the automobile air conditioner.

Thereafter, when the valves S1, S2, S6 and S7 are opened, the S4 valve is opened to sense the pressure in the pressure sensor (P).

Then, the oil supply unit opens the S9 valve. Accordingly, the first oil stored in the first oil storage tank 610 can be injected along the first and second collection lines 421 and 422. [

Frozen oil injection (second oil)

When the second oil is injected, the high-pressure connection part 100 and the low-pressure connection part 200 form a vacuum as described above in the state of being connected to the automobile air conditioner.

Thereafter, when the valves S1, S2, S6 and S7 are opened, the S4 valve is opened to sense the pressure in the pressure sensor (P).

Then, the oil supply unit opens the S11 valve. Therefore, the second oil stored in the second oil storage tank 620 can be injected along the first and second collection lines 421 and 422. [

The air conditioner gas injection and recovery equipment of the present invention does not use two types of refrigerant at the same time.

Here, the recovery amount measuring device 480 measures the amount of refrigerant in the first and second refrigerant storage units 310 and 320.

That is, when the first refrigerant is used in the controller (not shown) and the condition is changed to the condition of using the second refrigerant, the controller causes the first refrigerant, which is being used, And the second refrigerant stored in the second refrigerant storage unit 320 is filled to use the second refrigerant.

The controller can control the opening and closing of the valves, the heat exchanging unit, and the driving of the compression unit. Further, it is possible to receive the pressure measured from the pressure sensor and drive the vacuum pump.

Through the above-described structure and operation, the embodiment according to the present invention can independently inject and recover the two kinds of refrigerant into the air conditioner of an automobile.

In addition, in the embodiment of the present invention, when a plurality of refrigerants are recovered and charged, the size of the apparatus can be reduced by commonly using the recovery line.

Further, in the embodiment of the present invention, when two refrigerants are used, only one refrigerant is used, and when another refrigerant is used, in-line cleaning can be performed by completely recovering the refrigerant in use.

Although the present invention has been described in connection with the specific embodiments of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

It is to be understood that the foregoing embodiments are illustrative and not restrictive in all respects and that the scope of the present invention is indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

100: High voltage connection
200: Low voltage connection
310: first refrigerant storage part
320: second refrigerant reservoir
400:
410: heat exchanger
421: First recovery line
422: 2nd collection line
423: Common line
430: floating line
441: 1-1 discharge line
442: discharge line 1-2
451: 2-1 discharge line
452: 2-2 discharge line
471: First quarter line
472: Second branch line
480: Recovery Quantity Detector
500:
510: first charge line
520: second charging line
600: Oil supply part
610: First oil storage tank
611: first oil supply line
620: second oil storage tank
621: second oil supply line

Claims (5)

A low pressure connection part connected to the automobile air conditioner, a first refrigerant storage part connected to the high pressure connection part and the low pressure connection part, the first refrigerant storage part storing the first refrigerant, and the high pressure connection part connecting the high pressure connection part and the low pressure connection part, A second refrigerant storage part connected to the first refrigerant storage part or the second refrigerant storage part for storing the second refrigerant and the first refrigerant or the second refrigerant flowing and vaporizing, And a second refrigerant storage unit for storing the first refrigerant or the second refrigerant supplied from the first refrigerant storage unit or the second refrigerant storage unit to the high-pressure connection unit and the low- ,
The air conditioner further includes an oil supply unit, wherein the oil supply unit includes a plurality of oil storage tanks for storing different refrigeration oils, and a plurality of oil storage tanks for supplying different refrigerating oils to the high- And an oil supply unit for supplying the low-pressure connection unit independently,
Wherein the recovery unit includes a heat exchange unit for vaporizing or heat-exchanging the first refrigerant or the second refrigerant, a compression unit for compressing the first refrigerant or the second refrigerant, and a high-pressure connection unit, A flow line connecting the heat exchange unit and the compression unit to flow the vaporized first refrigerant or the second refrigerant to the compression unit, A pair of first discharge lines connecting the heat exchange unit and independently flowing the compressed first refrigerant or second refrigerant to the heat exchange unit, and a second discharge line connecting the heat exchange unit and the first refrigerant storage unit, And the first refrigerant or the second refrigerant, which is heat-exchanged in the heat exchanging unit, is independently connected to the first refrigerant storage unit or the second refrigerant storage unit, A second discharge line, a pair of first discharge lines, and a pair of second discharge lines to selectively open and close the first refrigerant or the second refrigerant, Respectively,
The first recovery line is connected to a high pressure connection for guiding the flow of the refrigerant and the second recovery line is connected to the low pressure And the first and second collecting lines are connected to a common line, the common line is connected to the heat exchanging unit, the first collecting line is provided with a plurality of first open / close valves, Wherein a plurality of second open / close valves are provided in the recovery line, a first branch line is branched to the first recovery line, a second branch line is branched to the second recovery line, A sensor is connected to the flow line, a filter is installed on the flow line,
The second-1 discharge line, which is one of the pair of second discharge lines, connects the heat exchanging unit and the first refrigerant storage unit, and the other of the pair of second discharge lines, Wherein the first refrigerant reservoir and the second refrigerant reservoir are connected to each other by a heat exchanger and a second refrigerant reservoir, and the first refrigerant reservoir and the second refrigerant reservoir are formed as tanks, Equipment for gas injection and recovery of air conditioner with gas tank.
delete delete The method according to claim 1,
Wherein each of the first refrigerant storage unit and the second refrigerant storage unit is provided with a recovery sensor for detecting the recovered amount of the first refrigerant or the second refrigerant recovered. And recovery equipment.
The method according to claim 1,
The charging unit includes:
A first charge line connecting the first refrigerant reservoir to the high pressure connection and the low pressure connection to form a flow path for the first refrigerant,
A second charge line connecting the second refrigerant reservoir to the high pressure connection and the low pressure connection to form a flow path for the second refrigerant,
And a charging side switching unit for opening and closing the first charging line and the second charging line.

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