EP0022027B1 - Procédé pour extraire un solvant imprégnant des tissus et dispositif pour sa mise en oeuvre - Google Patents

Procédé pour extraire un solvant imprégnant des tissus et dispositif pour sa mise en oeuvre Download PDF

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Publication number
EP0022027B1
EP0022027B1 EP19800400964 EP80400964A EP0022027B1 EP 0022027 B1 EP0022027 B1 EP 0022027B1 EP 19800400964 EP19800400964 EP 19800400964 EP 80400964 A EP80400964 A EP 80400964A EP 0022027 B1 EP0022027 B1 EP 0022027B1
Authority
EP
European Patent Office
Prior art keywords
phase
air
condenser
fluid
temperature
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.)
Expired
Application number
EP19800400964
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German (de)
English (en)
French (fr)
Other versions
EP0022027A1 (fr
Inventor
Jacques Lance
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.)
FRIMAIR SA
Original Assignee
FRIMAIR SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by FRIMAIR SA filed Critical FRIMAIR SA
Publication of EP0022027A1 publication Critical patent/EP0022027A1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F43/00—Dry-cleaning apparatus or methods using volatile solvents
    • D06F43/08—Associated apparatus for handling and recovering the solvents
    • D06F43/086—Recovering the solvent from the drying air current
    • D06F43/088—Condensing arrangements

Definitions

  • the present invention relates to a process for extracting an impregnating solvent from fabrics, in particular after dry cleaning of these fabrics in the dyeing industry.
  • thermodynamic machine as a cooling surface.
  • the adaptation of the degree of cooling according to the envisaged phase is carried out by modifying the pressure upstream of the expansion member of said machine, which leads to a relatively complex and delicate mechanical production of this machine.
  • the object of the invention is to provide a method and a device which makes it possible to regulate the cooling phenomenon in a manner strictly necessary and sufficient to prevent this icing.
  • This object is achieved, in accordance with a first aspect of the invention, by injecting into the expanded refrigerant admitted for evaporation a predetermined flow rate of gaseous hot fluid controlled by the temperature of the evaporated fluid.
  • the temperature of the evaporator itself is precisely regulated, which makes it possible to avoid icing under the most rational conditions.
  • the device for extracting a solvent impregnating fabrics after dry cleaning comprises an air circulation corridor mounted in closed circuit on a cleaning drum.
  • a cooling battery and a heating battery are connected in series in this corridor and a condensate recovery point is provided between these two batteries.
  • the cooling coil is the evaporator of a thermodynamic machine and this device is characterized in that the circuit of the thermodynamic machine comprises a bypass connecting the piping of hot gaseous fluid to the piping of expanded fluid upstream of the evaporator, this bypass comprising a servo valve connected to a temperature detector located on the fluid piping leaving the evaporator, to maintain the temperature of said evaporator in a predetermined band.
  • a dry cleaning machine for clothes comprises a drum 1 provided with stirring means not shown, on which is mounted in a closed circuit a corridor 2 for air circulation, com carrying a fan 3 which causes this circulation in the general direction of the arrows.
  • a cold battery 4 constituted by the evaporator of a refrigerating machine and a heating battery 5 providing external thermal energy to the system.
  • this battery operates with steam.
  • a low point 6 from which a pipe 7 provided with a control light 8 to a tank 9 for separating immiscible liquid phases.
  • a buffer 11 controlled by a jack 12 can be lowered to cooperate with a bearing 13 and isolate the heating battery 5.
  • a control device not shown allows, simultaneously, to actuate a jack 14 associated with a pad 15 to open a corridor of bypass 2a and force the air to circulate according to the arrows F1.
  • An air filter 16 is arranged in the corridor 2 to retain solid impurities from the clothes.
  • the tank 9 comprises a vertical partition 17 not going down to the bottom and delimiting two compartments 9a, 9b, the pipe 7 opening at the bottom of the compartment 9a.
  • Two vertical tubes 18a, 18b are housed in the respective compartments 9a, 9b and open out at different heights.
  • the tube 9a is connected to a tank 19 for recovering water and the tube 9b, which opens lower than the tube 9a, is connected to a circuit (not shown) for solvent recovery.
  • the circuit includes a compressor 21 discharging the gaseous refrigerant in a line 22 leading to a condenser 23 cooled by a water circuit 24.
  • This water circuit is provided with a servo-valve 25 connected to a temperature sensor 26 which measures the temperature of the fluid arriving at the condenser 23 to control the flow of cooling water to this temperature in order to obtain substantially constant cooling of the condenser.
  • the condenser opens into a line 27 in which a desiccant filter 28, a solenoid valve 29, and a control lamp 31 are mounted in series.
  • Line 27 finally arrives at the evaporator 4 via a pressure regulator 32 controlled by the pressure prevailing downstream in a line 33 returning to the compressor 21.
  • a pressure regulating valve 34 is mounted on line 33.
  • the refrigeration circuit also comprises a pipe 35 mounted as a bypass and directly connecting the pipe 22 to the pipe 27 between the expansion valve 32 and the evaporator 4.
  • a solenoid valve 36 and a servo-valve 37 connected to a sensor 38 of the temperature of the refrigerant leaving the evaporator, so as to open when this temperature tends to drop.
  • the fan 3 is started, the buffers 11 and 15 being in the position indicated in FIG. 1.
  • the compressor 21 is started, the solenoid valve 36 being open.
  • the air is circulated in the corridor 2 according to the arrows, passing through the heating battery 5 where it heats up to a temperature between 60 ° and 70 ° C before entering the drum 1 where it evaporates a part of the solvent permeating clothing.
  • the servo valve 37 admits sufficient coolant leaving the compressor 21 at the inlet of the evaporator 4 so that the surface of the latter is not at a temperature below 0 ° C or above 5 ° C , so that water vapor icing is avoided.
  • This evaporation phase is variable depending on the amount of solvent to be evaporated, but, in the usual cleaning machines, it is between 6 and 16 minutes. It is considered complete when about 90% of the solvent which has permeated the clothes has been evaporated after emptying.
  • the buffers 11 and 15 are then operated by the jacks 12 and 14, so as to isolate the heating coil 5, the air passing along the arrows F1.
  • the solenoid valve 36 is closed, so that the refrigerant leaving the expansion valve 32 is no longer heated by mixing and the surface temperature of the evaporator 4 is between -15 ° C and -25 °. C, preferably at -18 ° C.
  • the air passing through the evaporator cools mainly in its boundary layer, but not in its entire mass. Leaving the evaporator 4, it still partially heats up in contact with the hot metallic masses of the machine, and especially in contact with the clothing it cools. Despite its gradual cooling, its evaporative power remains high due to its great dryness obtained by the above-mentioned vigorous cooling.
  • the clothes are suitably cooled, de-crumpled and deodorized, containing practically no more solvent. The operation is therefore finished.
  • the application of the method therefore makes it possible to obtain these excellent performances in a simple manner, while procuring a notable operating economy on the consumption of cooling water, due to the fact that, the condenser being at a temperature clearly. higher than that of the air to be cooled, it is possible, by exchange, to bring the water to a markedly higher temperature and thus reduce its flow rate. For example, water, instead of going out at 25 ° C, can go out at 40 ° C.
  • the cleaning machine is constituted substantially in the same way as in the previous embodiment, except that a bypass 2b is formed in parallel with the evaporator 4 in the corridor 2, this bypass being closable by a buffer 41 actuated by a jack 42.
  • an additional condenser 43 is placed on the air path, incorporated in the refrigeration circuit mounted in parallel with the condenser 23 and switchable with it, by a set of valves 44, 45, the valve 44 supplying the condenser 23, and the valve 45 supplying the condenser 43.
  • a servo valve 46 controlled by the upstream pressure, is mounted at the outlet of the condenser 43.
  • This condenser is provided with a bypass 47 provided with a servo valve 48 which closes when the pressure difference between its inlet and its outlet tends to increase.
  • the valve 45 is open and the valve 44 is closed.
  • the valve 48 is open and the valve 46 is closed. Then, the pressure rising in the condenser 43, the valve 46 opens and the valve 48 closes. It follows that the condenser 43 is in service, serving as a heating battery, and that the condenser 23 is off, allowing the flow of cooling water to stop.
  • the bypass 35 is opened to ensure that the surface temperature of the evaporator 4 does not fall below 0 ° C, as explained above.
  • valve 45 When we pass to the second phase, called deodorization, we close the valve 45, which isolates the condenser 43 while maintaining it under pressure, and we open the valve 44, which activates the condenser 23 in which we restores the cooling water flow. Closure 35 is also closed by valve 36.
  • the deodorization process continues as in the previous embodiment.
  • the bypass 2b is opened by opening the buffer 41 by the jack 42, so that part of the air is bypassed according to arrow F2.
  • the evaporator seeing only about half of the air flow passing, cools more easily, which allows the solvent vapors to condense more efficiently.
  • This bypass necessary for the phase flow, can advantageously be maintained until the end.
  • This embodiment has the advantage over the previous one that the heat recovered by cooling the air is used, in the first phase, for heating. Not only does it save cooling water, but it also saves the supply of external thermal energy for heating.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detergent Compositions (AREA)
EP19800400964 1979-07-03 1980-06-27 Procédé pour extraire un solvant imprégnant des tissus et dispositif pour sa mise en oeuvre Expired EP0022027B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7917187A FR2460363A1 (fr) 1979-07-03 1979-07-03 Procede pour extraire un solvant impregnant des tissus et dispositif pour sa mise en oeuvre
FR7917187 1979-07-03

Publications (2)

Publication Number Publication Date
EP0022027A1 EP0022027A1 (fr) 1981-01-07
EP0022027B1 true EP0022027B1 (fr) 1983-09-21

Family

ID=9227412

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800400964 Expired EP0022027B1 (fr) 1979-07-03 1980-06-27 Procédé pour extraire un solvant imprégnant des tissus et dispositif pour sa mise en oeuvre

Country Status (3)

Country Link
EP (1) EP0022027B1 (enExample)
DE (1) DE3064914D1 (enExample)
FR (1) FR2460363A1 (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2484678A (en) * 2010-10-19 2012-04-25 John Ward Washing machine with built-in evaporator and condenser unit

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR747508A (fr) * 1932-12-14 1933-06-19 Neu Sa Procédé de déshumidification d'air avec réglage automatique de l'état hygrométrique et de la température
FR801580A (fr) * 1935-02-13 1936-08-07 Const Mecaniques Escher Wyss A Installation de séchage
US3739487A (en) * 1971-01-28 1973-06-19 R Clark Drying apparatus
GB1379742A (en) * 1971-03-25 1975-01-08 Neil & Spencer Ltd Dry cleaning
US3791160A (en) * 1971-09-16 1974-02-12 Nat Union Electric Corp Air conditioning system with temperature responsive controls
FR2293513A1 (fr) * 1974-12-04 1976-07-02 Centre Tech Teinture Nettoyage Dispositif pour le nettoyage a sec d'articles textiles et procede pour la mise en oeuvre de ce dispositif
GB1552111A (en) * 1975-09-26 1979-09-05 Neil & Spencer Ltd Dry cleaning
GB1488720A (en) * 1976-02-13 1977-10-12 Neil & Spencer Ltd Dry cleaning

Also Published As

Publication number Publication date
EP0022027A1 (fr) 1981-01-07
DE3064914D1 (en) 1983-10-27
FR2460363B1 (enExample) 1983-08-12
FR2460363A1 (fr) 1981-01-23

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