EP3680582A1 - Station zur rückgewinnung und zum wiederaufladen einer kühlflüssigkeit und assoziiertes verfahren - Google Patents

Station zur rückgewinnung und zum wiederaufladen einer kühlflüssigkeit und assoziiertes verfahren Download PDF

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Publication number
EP3680582A1
EP3680582A1 EP20150791.0A EP20150791A EP3680582A1 EP 3680582 A1 EP3680582 A1 EP 3680582A1 EP 20150791 A EP20150791 A EP 20150791A EP 3680582 A1 EP3680582 A1 EP 3680582A1
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EP
European Patent Office
Prior art keywords
module
station
separator
refrigerant
solenoid valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20150791.0A
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English (en)
French (fr)
Other versions
EP3680582B1 (de
Inventor
François Rodriguez
Laurent Dupuy
Erwan BARBIER
Nicolas Sanchez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
France Clim Invest
Nouvelle De Climatisation Sndc Ste
Original Assignee
Nouvelle De Climatisation Sndc Ste
Octal
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Publication of EP3680582A1 publication Critical patent/EP3680582A1/de
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Publication of EP3680582B1 publication Critical patent/EP3680582B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B45/00—Arrangements for charging or discharging refrigerant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/006—Accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/001—Charging refrigerant to a cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/002—Collecting refrigerant from a cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/005—Service stations therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/006—Details for charging or discharging refrigerants; Service stations therefor characterised by charging or discharging valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/007—Details for charging or discharging refrigerants; Service stations therefor characterised by the weighing of refrigerant or oil

Definitions

  • the present invention relates to the recharging of refrigerant fluid and more particularly to a station for recovering and recharging a refrigerant fluid in a refrigeration module of a vehicle, in particular a motor vehicle, a machine or an agricultural or public works machine, a utility or industrial vehicle.
  • the invention aims in particular to allow an accurate and reliable weighing of the coolant present in the internal circuit of the station.
  • the charging station is in the form of a mobile carriage on which are mounted, in particular, a reservoir for storing the refrigerant, a vacuum pump, a separator, a compressor and a plurality of solenoid valves connected by pipes allowing an internal fluid circuit to be produced between a low pressure inlet and a high pressure outlet of the station.
  • the charging station In order to be able to ensure the safety of the operator carrying out the operations for recovering and recharging the coolant, the charging station must be able to precisely determine the weight of the coolant contained in the tank at each instant following the start of the phase. recovery. Indeed, the liquid part of the refrigerant contained in the tank can, by expansion, especially during a rise in temperature, reach the internal volume of the tank and lead to the explosion of said tank. For example, it is known not to exceed 80% of the volume of the tank to avoid a risk of explosion.
  • the tank In order to measure the weight of the liquid part of the coolant, the tank is mounted on an electronic balance, called a weighing cell, which indicates the total instantaneous weight of the tank and thus makes it possible to deduce from it the weight of the coolant that the tank contains.
  • a weighing cell which indicates the total instantaneous weight of the tank and thus makes it possible to deduce from it the weight of the coolant that the tank contains.
  • the invention firstly relates to a station for recovering, recycling and recharging a refrigerant fluid from a refrigeration module, in particular a vehicle, such as a motor vehicle, a machine or a machine. agricultural or public works, utility or industrial vehicle, said station comprising an internal circuit for circulating said refrigerant, said internal circuit comprising a low pressure inlet intended to be connected to the low pressure outlet of said refrigeration module, a separator capable of separating the refrigerant and oil recovered from the refrigeration module by the low pressure inlet, a condenser capable of condensing the refrigerant separated by the separator, a storage tank for refrigerant, in particular condensed by the condenser, a load cell on which tank is mounted and which is capable of weighing said tank, a high pressure outlet intended to be connected to the high pressure inlet of the modu the refrigerator, a group of solenoid valves connected to the low pressure inlet, the separator, the condenser, the tank and the high pressure outlet
  • the term "refrigeration module” means an air conditioning or refrigeration module or any refrigeration module requiring the recovery, recycling and recharging of a refrigerant.
  • the weighing of the assembly formed by the separator, the condenser and the tank as well as the pipes connecting them two by two makes it possible to weigh all of the liquid part of the refrigerant recovered from a refrigeration module and of the liquid part of the refrigerant. stored in the tank. Such a weighing makes it possible to know precisely the quantity of fluid present in the station while avoiding carrying out a purging of the internal circuit of the station.
  • the absence of a purge step simplifies the architecture of the station while reducing the total recovery and recharging time.
  • the station according to the invention is particularly advantageous when used on board a ship subjected to heeling phenomena which can move the refrigerant fluid through the fluid circuit between the separator, the condenser and the tank. Indeed, in this case, even if the coolant circulates between the condenser, the separator and the tank, the total weighing value of the liquid remains constant.
  • the device makes it possible to reduce the discharge of fluid into the atmosphere during maintenance of the filter drier compared to previous solutions in which the fluid was not completely evacuated from the solenoid valves, from the dehydration module and from the front separator. maintenance of the filter drier. The device also makes it possible to secure maintenance operations by avoiding any contact of the operator with the fluid.
  • the reservoir being in the form of a carboy, preferably metallic, the condenser is fixed in the upper part of said carboy.
  • the reservoir being in the form of a carboy, preferably metallic, comprising a side wall, the separator is fixed on said side wall.
  • the group of solenoid valves comprises a module of high pressure line solenoid valves connected to the high pressure outlet, a module of low pressure line solenoid valves connected to the low pressure inlet, a module d 'recovery solenoid valves connected to the separator, and a refrigerant charge solenoid valve connected to the tank.
  • the station comprises an oil injection bottle and the solenoid valve group comprises an oil injection solenoid valve connected to said oil injection bottle in order to inject oil into the refrigeration module via the high pressure outlet.
  • the station comprises a tracer injection bottle, preferably ultraviolet, and the group of solenoid valves comprises a tracer injection solenoid valve connected to said tracer injection bottle in order to inject a tracer in the refrigeration module via the high pressure outlet.
  • the station comprises a dehydration module, said dehydration module comprising a filter drier connected to the separator, a compressor, connected to the filter drier and a compressor separator, connected on the one hand to the compressor and on the other hand to the separator.
  • a dehydration module makes it possible to absorb the moisture contained in the coolant separated from the used oil by the separator in order to efficiently condense said coolant to store it in liquid form in the tank.
  • the station comprises a carriage on which the load cell, the tank and the group of solenoid valves are mounted.
  • a cart makes it easy to move the station, especially in a garage.
  • the station includes a vacuum pump capable of creating a vacuum in the internal circuit of the station.
  • a vacuum pump capable of creating a vacuum in the internal circuit of the station.
  • Such a vacuum allows both to remove air and residual moisture from the refrigeration module in order to recharge it effectively.
  • the station comprises a module of pumping solenoid valves connected to the vacuum pump.
  • said pump solenoid valve module is opened in a vacuum pumping (or draw) mode in order to produce a vacuum in the internal circuit and entirely remove the residual moisture in the refrigeration module.
  • the group of solenoid valves comprises an interconnection box, called a “nurse”, to which are connected the module of high pressure line solenoid valves, the module of low pressure line solenoid valves, the module of solenoid valve recovery, the pump solenoid valve module, the oil injection solenoid valve, the tracer injection solenoid valve and the refrigerant charge solenoid valve.
  • a “nurse” to which are connected the module of high pressure line solenoid valves, the module of low pressure line solenoid valves, the module of solenoid valve recovery, the pump solenoid valve module, the oil injection solenoid valve, the tracer injection solenoid valve and the refrigerant charge solenoid valve.
  • the station comprises a so-called “feeder pressure” sensor capable of measuring the pressure of the fluids in the interconnection unit.
  • the low pressure line solenoid valve module and the high pressure line solenoid valve module each comprise a first solenoid valve and a second solenoid valve connected head to tail.
  • Such a configuration allows both refrigerant circulation in both directions of circulation in the solenoid valve module while avoiding untimely return of refrigerant in the interconnection box.
  • the recovery solenoid valve module comprises a first solenoid valve and a second solenoid valve connected head to tail in order in particular to allow, by simultaneous opening of the first solenoid valve and the second solenoid valve, the measurement of the pressure in the housing. interconnection.
  • the pumping solenoid valve module comprises a first solenoid valve and a second solenoid valve connected head to tail in order to allow in particular a vacuum at a pressure less than -0.8 bar, for example of the order of - 1 bar.
  • the station comprises a control module capable of controlling the group of solenoid valves. More specifically, the control module makes it possible to individually control the opening or closing of each solenoid valve, in particular each solenoid valve of each solenoid valve module.
  • the dehydration module comprising a separation solenoid valve
  • the control module is able to control the separation solenoid valve in order to control the pressure in the separator. This makes it possible to reduce the quantity of refrigerant discharged into the atmosphere during the extraction of used oil from the separator towards a bottle of used oil.
  • the separator and the condenser are connected by a pipe, preferably flexible.
  • the condenser and the tank are connected by a pipe, preferably flexible.
  • the invention also relates to a method for weighing a coolant in a station for recovering and recharging a coolant from a refrigeration module, in particular of a vehicle, such as a motor vehicle, a machine or a machine.
  • a utility or industrial vehicle said station comprising a coolant storage tank, a separator adapted to separate the coolant from the used oil recovered from the refrigeration module, a condenser capable of condensing the separated coolant by the separator, at least one pipe connecting the separator and the condenser, at least one pipe connecting the condenser and the tank, said method comprising a step of recovering the refrigerant and oil from the refrigeration module, a step of separating the refrigerant and oil recovered from the refrigeration module, a stage of condensation of the part gas of the separated refrigerant, said method being remarkable in that it comprises a step of continuously weighing the tank, the separator, the condenser and the pipes connecting them during the recovery step.
  • the station is a station as described above.
  • the invention also relates to a method for maintaining a station for recovering and recharging a refrigerant fluid from a refrigeration module, said station comprising a reservoir for storing coolant, a separator adapted to separate the coolant from the waste oil recovered from the refrigeration module, a dehydration module, a condenser capable of condensing the refrigerant fluid separated by the separator, at least one pipe connecting the separator and the condenser, at least one pipe connecting the condenser and the tank, and a group of solenoid valves comprising a module of recovery solenoid valves, said dehydration module comprising a valve, a filter drier, connected to said valve, a compressor, connected to the filter drier and a compressor separator, connected on the one hand to the inlet of the compressor and at the outlet of the compressor, and on the other hand to the separator, said method comprising, the valve and the module of recovery solenoid valves ion being in the open position, a step of activating
  • This process makes it possible to reduce the discharges of fluid into the atmosphere compared to previous solutions in which the fluid was not completely evacuated from the solenoid valves, from the dehydration module and from the separator before the maintenance of the filter drier.
  • the method also makes it possible to secure the maintenance operation by avoiding any contact of the operator with the fluid.
  • maintenance can correspond to a replacement of the filter drier.
  • the invention will be described in its application to a charging station for a refrigerant for an air conditioning module of a vehicle, without however this being limiting of the scope of the present invention.
  • the invention indeed also applies to any refrigeration module operating with a refrigerant requiring recovery, recycling and recharging, such as, in particular, a refrigeration module.
  • the refrigerant may be of the HFC, HCFC or HFO type but could be any other suitable type of refrigerant.
  • the station 1 is advantageously in the form of a mobile carriage 1A which can be moved by an operator, for example in a garage.
  • the carriage 1A comprises a structure 2, preferably metallic, comprising a base 3 on which the elements, called “functional”, are mounted, fulfilling the functions of recovery, recycling and recharging of refrigerant fluid as will be explained below .
  • the terms “on”, “under”, “upper”, “lower”, “horizontal” and “vertical” are defined in relation to a standard use of the station, that is to say when the station is placed flat on a horizontal ground (ie parallel to the terrestrial horizontal), as illustrated on the Figures 1 to 6 .
  • the base 3 includes an upper face and a lower face.
  • the structure 2 comprises four wheels 4A, 4B, a tubular frame 5 mounted on the upper face of the base 3 and forming a handle 5A extending horizontally on one side of the carriage 1A in order to be able to handle it.
  • the two wheels 4A located to the right of the handle 5A designated “rear wheels”, are of greater width and diameter than the other two wheels 4B, designated “front wheels” so allow a tilting of the carriage 1A on the two rear wheels 4A in order to be able to move it easily and pass obstacles such as, for example, pipes, steps, sidewalks, etc.
  • the station 1 also includes a plurality of panels 6, in particular an upper panel 6A, making it possible to close the lateral faces and the upper face of the carriage 1A in order to protect the functional elements mounted on the upper part of the base 3.
  • Two front handles 7 are mounted on the upper panel 6A in order to be able to manipulate the station 1.
  • the upper panel 6A also in this example also includes a printer 8 making it possible to print the intervention and maintenance data generated by the station 1.
  • station 1 comprises a low pressure input 10, a separator 20, a dehydration module 30, a condenser 40 and a tank 50, a load cell 60 of the tank 50, a vacuum pump 70, a high pressure outlet 80, a group of solenoid valves 90, an oil injection bottle 100, a tracer injection bottle 110, a waste oil recovery bottle 120 and a module 130.
  • the low pressure inlet 10, the separator 20, the dehydration module 30, the condenser 40, the tank 50, the high pressure outlet 80 and the group of solenoid valves 90 define an internal circulation circuit for the refrigerant.
  • hoses in particular flexible hoses
  • group of solenoid valves 90 so as to allow the station to operate in several modes depending on the configuration of the solenoid valves of the group of solenoid valves 90.
  • the low pressure inlet 10 is intended to be connected, via a pipe 11, to the low pressure outlet of the air conditioning module (not shown) from which the refrigerant is to be recovered and / or recharged with refrigerant.
  • a pressure gauge 132 makes it possible to measure the pressure of the refrigerant fluid flowing through the low pressure inlet 10.
  • the separator 20 is able to separate the refrigerant and the oil recovered from the air conditioning module by the low pressure inlet.
  • the separator 20 comprises a bottle 21 (or carboy) comprising a mixed inlet A IN, a hydrated fluid outlet A OUT, a dehydrated fluid inlet R IN, a dehydrated fluid outlet R OUT, a coil 22 and an outlet used oil 23.
  • the mixed input A IN is positioned in the upper part of the separator 20 and makes it possible to collect the coolant and the used oil coming from the air conditioning module to which the station 1 is connected.
  • the hydrated fluid outlet A OUT allows the refrigerant fluid to be evacuated from the bottle 21 to the dehydration module 30.
  • the dehydrated fluid inlet R IN makes it possible to collect the refrigerant fluid dehydrated by the dehydration module 30.
  • the coil 22 is connected between the dehydrated fluid inlet R IN and the dehydrated fluid outlet R OUT.
  • the coil 22 is arranged in the lower part of the internal space of the bottle 21 and has the function of facilitating the evaporation of the hydrated fluid entered by the mixed inlet A IN and lowering the temperature of the fluid leaving the compressor 33 to facilitate the condensation of the fluid in the condenser 40.
  • the dehydrated fluid outlet R OUT makes it possible to convey the dehydrated fluid having passed through the coil 22 to the condenser 40.
  • the used oil outlet allows the used oil to be evacuated to the waste oil recovery bottle 120 via an EV13 recovery solenoid valve.
  • the dehydration module 30 comprises a valve 31, a filter drier 32, a compressor 33, a compressor separator 34, a separation electrovalve EV11, a safety pressure switch Pr and a non-return valve CL1.
  • the valve 31 makes it possible to isolate the dehydrator 32 during maintenance, in particular when replacing the dehydrator 32.
  • the safety pressure switch Pr makes it possible to interrupt the operation of station 1, in particular to block the operation of all the equipment in operation when the fluid pressure in the internal circuit is too high in order to avoid any risk of explosion in the event of a fault in station 1.
  • the filter drier 32 is connected to the separator 20 and has the function of absorbing the humidity contained in the refrigerant.
  • the compressor 33 is connected to the filter drier 32 and makes it possible to circulate the refrigerant fluid through the dewatering module 30, in particular the filter drier 32 and the compressor separator 34.
  • the compressor separator 34 is connected to the compressor 33 (via the connector port IN) and has the function of recovering the oil from the compressor 33 entrained by the circulating refrigerant.
  • the compressor separator 34 is connected (via the OUT connector port) to the separator 20.
  • the separation solenoid valve EV11 makes it possible to return the oil to the compressor 33 when the latter is stopped.
  • the condenser 40 comprises a coil 40A through which the refrigerant circulates in order to condense it.
  • the condenser 40 is mounted on the tank 50 via a support 42, for example metallic.
  • the condenser 40 is said to be “ventilated” because it comprises a fan 43 making it possible to cool the refrigerant fluid circulating in the coil 40A.
  • the condenser 40 is able to condense the refrigerant fluid separated by the separator 20.
  • the reservoir 50 is in the form of a cylinder 50A allowing both the recovery and storage of the refrigerant condensed by the condenser 40 and the storage of new refrigerant when the cylinder 50A is changed or installed filled for the first time. .
  • the 50A cylinder also allows the supply of stored refrigerant to recharge the vehicle's air conditioning module.
  • the cylinder 50A comprises a side wall 50A1, on which the separator 20 and the condenser 40 are mounted, and a base 50B making it possible to mount the reservoir 50 on the load cell 60 stably.
  • the reservoir is connected to the condenser 40 via a valve 51.
  • a tank pressure sensor C2 is connected between the EV18 non-condensing purge solenoid valve and the valve 52 and makes it possible to measure the pressure of the fluid stored in the tank 50.
  • the valve 52 is used in particular to allow the calibration of the pressure sensor tank C2.
  • the load cell 60 is an electronic balance allowing, for example, weighing to the nearest gram.
  • the separator 20 and the ventilated condenser 40 are mounted on the cylinder 50A which is placed on the weighing cell 60 so as to allow an overall weighing at the same time of the liquid part of the refrigerant stored in the separator 20, in the condenser 40 ventilated and in the cylinder 50A, and the liquid part of the refrigerant stored or circulating in the pipe connecting the separator 20 to the ventilated condenser 40 and the pipe connecting the condenser 40 ventilated to the cylinder 50A.
  • the separator 20 is mounted on a support 54.
  • a heating belt 55 is placed around the tank 50 to regulate the temperature and therefore the pressure inside the tank 50.
  • the vacuum pump 70 makes it possible in particular to create a vacuum and remove the humidity in the internal circuit of station 1 and in the air conditioning module connected to station 1.
  • the high pressure outlet 80 is intended to be connected, via a hose 81, to the high pressure inlet of the air conditioning module.
  • a pressure gauge 134 makes it possible to measure the pressure of the refrigerant fluid flowing through the high pressure outlet 80.
  • the solenoid valve group 90 is connected to the low pressure inlet 10, to the separator 20, to the tank 50, to the vacuum pump 70 and to the high pressure outlet 80 in order to allow the operation of station 1 in different modes.
  • the solenoid valve group 90 comprises an interconnection box 91, called a “feeder”, to which are connected a high pressure line solenoid valve module EV9, a low pressure line solenoid valve module EV10, a solenoid valve module EV12 recovery module, EV14 pumping solenoid valve module, EV15 oil injection solenoid valve, EV16 tracer injection solenoid valve and EV17 refrigerant charge solenoid valve and C1 feed pressure sensor ( figure 7 ).
  • the low pressure line solenoid valve module EV10 is connected to the low pressure inlet 10.
  • the recovery solenoid valve module EV12 is connected to the separator 20.
  • the high pressure line solenoid valve module EV9 is connected to the high outlet pressure 80.
  • the EV14 pump solenoid valve module is connected to the vacuum pump 70.
  • the EV9 high-pressure line solenoid valve module, the EV10 low-pressure line solenoid valve module, the EV12 recovery solenoid module and the EV14 pumping solenoid module each include a first solenoid valve and a second solenoid valve connected to the head. -spade. This makes it possible in particular to avoid, for the high pressure line solenoid valve module EV9 and the low pressure line solenoid valve module EV10, a return of coolant from the air conditioning module to the interconnection unit 91 of the group solenoid valves 90.
  • the oil injection solenoid valve EV15 is connected to the oil injection bottle 100.
  • a non-return valve CL2 is arranged between the oil injection solenoid valve EV15 and the interconnection box 91 in order to d '' avoid any return of fluid in the oil injection bottle 100.
  • the tracer injection solenoid valve EV16 and a non-return valve CL3 are connected to a tracer injection bottle 110.
  • the charging solenoid valve in refrigerant EV17 and a non-return valve CL4 are connected to the tank 50 via a valve 53.
  • the valve 53 is, in normal operation of station 1, always open but is tilted in the closed position in order to close the tank 50 on its phase liquid to be able to carry out maintenance operations.
  • the control module 130 makes it possible in particular to control the solenoid valves of the group of solenoid valves 90 and to display the pressure at different places in the circuit.
  • the control module 130 includes in particular an LCD screen, an alphanumeric keypad, navigation keys, light-emitting diodes and emitters of sound signals (emitted for example when keys of the alphanumeric keypad are when pressed or when station 1 has finished recharging the refrigerant of the air conditioning module.
  • an operator connects the low pressure inlet 10 of station 1 at the low pressure outlet of the vehicle air conditioning module and the high pressure outlet of station 1 at the high pressure inlet of the vehicle air conditioning module.
  • the operator activates, via the control module 130, the coolant recovery and waste oil recovery function.
  • the control module 130 controls the opening of the high pressure line solenoid valve module EV9, the low pressure line solenoid valve module EV10 and the recovery solenoid valve module EV12, the other solenoid valves and modules. solenoid valves being closed.
  • the refrigerant and the used oil contained in the vehicle's air conditioning module circuit are sent to the separator 20 successively via the low pressure input 10, the low pressure line solenoid valve module EV10 and the solenoid valve module of recovery EV12 and the input A IN of the separator 20.
  • a separation step E2 the used oil falls to the bottom of the separator 20 while the coolant is absorbed by the outlet A OUT under the action of the compressor 33 and is conveyed to the filter drier 32.
  • the filter drier 32 then absorbs the humidity of the refrigerant which is then conveyed to the compressor separator 34.
  • the accumulation of oil from the compressor 33 in the compressor separator 34 increases the pressure in the separator 20.
  • the separation solenoid valve EV11 can be controlled by the control module 130 during opening, periodically and in spurts, for example three or four times every 10 seconds, in order to convey the oil from the compressor separator 34 to the compressor 33 and thus reduce the pressure in the separator 20, this pressure being measured by the feed pressure sensor C1. More specifically, the measurement of the pressure in the separator 20 by the feed pressure sensor C1 allows the control module 130 to control the pressure in the separator 20 so that it remains low, for example of the order of 0.3 bar.
  • the low pressure in the separator 20 avoids propelling a large quantity of refrigerant into the atmosphere thus reducing the quantity of polluting gas released into the atmosphere compared to previous solutions which discharges the used oil to the used oil recovery bottle 120 at high pressure and therefore in large quantities.
  • the refrigerant leaving the coil 22 is sent to the condenser 40 which transforms the gaseous part into liquid in order to store it in the tank 50 in a condensation step E3.
  • the weighing cell 60 weighs, in a step E4, the assembly formed by the reservoir 50, the separator 20, the condenser 40 as well as the pipes connecting them two to of them.
  • This overall weighing makes it possible to weigh all of the coolant which circulates or is stored in the tank 50, in the separator 20, in the condenser 40 as well as in the pipes connecting them two by two.
  • the control module 130 deduces the weight of the refrigerant recovered in order to s' ensure that the load limit of the tank 50 is not likely to be exceeded, which could increase the internal pressure of the tank 50 beyond a limit for which a risk of explosion of the tank 50 is possible.
  • a step E5 of evacuating the internal circuit of station 1 is carried out in a mode known as “evacuation” .
  • This step consists in opening the EV14 pumping solenoid module, the EV9 high pressure line solenoid module and the EV10 low pressure line solenoid module, the other solenoid valves and solenoid modules being closed, in order to lower the internal circuit pressure to a negative value, for example to a value of the order of - 20 bars.
  • the EV16 tracer injection solenoid valve can be opened if necessary in order to inject, from the tracer injection bottle 110, an ultraviolet tracer into the air conditioning module during a step E7 in order to detect a leak said air conditioning module from an ultraviolet lamp (so-called “tracer injection mode”).
  • a step of purging the non-condensables can be carried out by opening the solenoid valve for purging the incondensables EV18 mounted on the tank 50, the other solenoid valves and solenoid valve modules being closed (so-called “non-condensing purge” mode).
  • the EV15 oil injection solenoid valve and, if applicable, the EV16 tracer injection solenoid valve are closed, then the EV17 refrigerant charge solenoid valve and the valve. 53 are open in order to allow the refrigerant fluid to be recharged from the air conditioning module during a step E8 in a so-called “recharging” mode.
  • the control module 130 positions or maintains the valve 31 in the open position, as does the recovery solenoid valve module EV12, and activates the compressor 33 in order to evacuate the coolant from the solenoid valve group 90, from the dehydration module 30 and from the separator 20 to the tank 50.
  • the control module 130 then places the valve 31 in the closed position.
  • the maintenance operator can then dismantle and replace the filter drier 32.
  • the control module 130 reopens the valve 31 and activates the vacuum pump 70 in order to expel air and humidity towards the outside, the circuit then being under vacuum.
  • the arrangement of the separator 20 and the condenser 40 on the tank 50 therefore advantageously makes it possible to precisely weigh at all times the weight of coolant contained in the station 1 in order to ensure that the limit volume of coolant in the tank 50 is not exceeded.
  • such an arrangement advantageously makes it possible to precisely determine the quantity of refrigerant fluid recovered from the air conditioning module.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Gas Separation By Absorption (AREA)
  • Sorption Type Refrigeration Machines (AREA)
EP20150791.0A 2019-01-10 2020-01-08 Station zur rückgewinnung und zum wiederaufladen einer kühlflüssigkeit und assoziiertes verfahren Active EP3680582B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1900226A FR3091752B1 (fr) 2019-01-10 2019-01-10 Station de récuperation et de recharge d’un fluide refrigérant

Publications (2)

Publication Number Publication Date
EP3680582A1 true EP3680582A1 (de) 2020-07-15
EP3680582B1 EP3680582B1 (de) 2022-11-02

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Country Status (3)

Country Link
EP (1) EP3680582B1 (de)
ES (1) ES2937110T3 (de)
FR (1) FR3091752B1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4768347A (en) * 1987-11-04 1988-09-06 Kent-Moore Corporation Refrigerant recovery and purification system
US5161385A (en) * 1991-03-18 1992-11-10 Schumacher Ernest W Refrigerant recovery and recycle system with flexible storage bag
US20080000240A1 (en) * 2006-06-30 2008-01-03 Travis Bakker Method and apparatus for refrigerant recovery unit filter dryer maintenance
DE202013004158U1 (de) * 2013-05-06 2014-08-07 Dometic Sweden Ab Service-Gerät zum Warten von Fahrzeugklimaanlagen
EP3162599A1 (de) * 2015-10-27 2017-05-03 Brain Bee S.P.A. Verfahren und vorrichtung zum rückgewinnen und wiederauffüllen von kältemittel in kraftfahrzeugen mit ölrückgewinnung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4768347A (en) * 1987-11-04 1988-09-06 Kent-Moore Corporation Refrigerant recovery and purification system
US5161385A (en) * 1991-03-18 1992-11-10 Schumacher Ernest W Refrigerant recovery and recycle system with flexible storage bag
US20080000240A1 (en) * 2006-06-30 2008-01-03 Travis Bakker Method and apparatus for refrigerant recovery unit filter dryer maintenance
DE202013004158U1 (de) * 2013-05-06 2014-08-07 Dometic Sweden Ab Service-Gerät zum Warten von Fahrzeugklimaanlagen
EP3162599A1 (de) * 2015-10-27 2017-05-03 Brain Bee S.P.A. Verfahren und vorrichtung zum rückgewinnen und wiederauffüllen von kältemittel in kraftfahrzeugen mit ölrückgewinnung

Also Published As

Publication number Publication date
FR3091752A1 (fr) 2020-07-17
ES2937110T3 (es) 2023-03-24
EP3680582B1 (de) 2022-11-02
FR3091752B1 (fr) 2021-05-28

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