FR2626900A3 - CONDENSING DEVICE FOR COMBINED MACHINE FOR WASHING AND DRYING LAUNDRY - Google Patents

Abstract

The invention relates to household appliances. A drying air circuit fitted with a fan puts hot, dry air in contact with the laundry, through a duct fitted with heating elements and sucks in the hot and humid air through the emptying of the tub and through a tubular condensing device 8 and cooled by a spray nozzle 14 supplied by a solenoid valve 13. The part of the device 8 located between the fan 7 and the nozzle 14 has annular enlargements 15 in which the entrained water droplets by the air collect in large drops which flow towards the drain along the duct 8. Main applications: household washing-drying machines.

Description

The present invention relates to a condensation device for a

combined machine for washing and

drying clothes.

  The invention relates in particular to an application

  such front-loading household appliances equipped with a tank in which a drum can rotate about a horizontal axis and is able to contain the laundry also

  well during washing than during drying.

  The drying operation can be effected by means of an open circuit for the circulation of the drying air, which air is then taken from the atmosphere

  ambient, heated, put in contact with the laundry and then

  thrown out of the machine in a wet and hot state, either by means of a closed air circuit, the air being

  obliged to cross successively

  tif heating, then the drum that contains the laundry, and a dehumidifier device, after which it is

  returned to the circuit, as described, for example

  in British Patent No. 2 17.2 978.

  In washer-dryers that pre-

  see a closed circuit for drying air, we use

  usually cooled condensation devices

  water that dehumidifies the air

  chase through curtains of spray water.

  foggy, or licked surfaces

  condensation dampened with a film of water

  coldness that flows against the current.

  In these condensation devices, we observe

  a drawback consisting in the entrainment of cooling water droplets by the air flow

  drying that passes through the condensation device.

  It is obvious that these water infiltrations

  cooling have a negative impact on the

  during the drying process.

  To overcome this drawback, it was proposed

  condensing devices in which the

  cooling water is isolated from the flow of drying air which circulates countercurrently through partitions

  separators which extend longitudinally

  of the conaenseur, as described in the

  British voucher No. 2,172,978, cited above.

  Or, in the case of machines in which the drying air is channeled so as to pass through curtains of cooling water sprayed in

  fog, it was proposed condensing devices

  with transverse channels for the collection of

  read the water droplets captured by the stream of se-

  as, for example, in the se-

  These arrangements reduce the entrainment of the cooling water but, on the other hand, they considerably complicate the construction of the condenser, especially in the case where the latter is used. must be realized by

  Plastic molding operations ..

  The main objects of the invention are therefore to provide a condensation device for washing machines which is of a simple construction and

  in which the phenomenon of entraining water from

  coldly either eliminated or at least

  Duit. These and other objects are achieved by a condensing device for a combined machine for washing and drying laundry, in particular of the household and front-loading type, which comprises a

  drum in which a drum rotates around a

  rizontal and is able to keep the laundry as well

  during washing only during drying, a drying air circuit equipped with a fan that delivers dry, heated air to bring it into contact with the laundry, through a duct provided with heating elements, and who

  sucks hot, moist air through the opening of

  dange of the tank and through the condensate

  this device being of the type which has a substantially tubular shape and is cooled by at least one

26269C0

  spray nozzle fed by a solenoid valve

  linked to the water supply pipeline, characterized

  in that the portion of the condensation device

  which is placed between the fan and the spray nozzle.

  cooling water presents a

  of ring enlargements of its transverse section.

  dirty. The appended drawing, - given only as a non-limiting example, will explain how

the invention can be realized.

  The unique figure in this drawing represents by

  a side view and partly in section a machine with

  drying worm equipped with a preferred embodiment

of the device according to the invention.

  -The washing machine indicated on the des-

  sin is substantially constituted by a tank! in the-

  what a drum 2 intended to contain the laundry to wash

  and drying is mounted to rotate around a horizontal axis

  zontal. The drum 2 is rotated by an engine

  electrical power and transmission devices

  known and not shown, and presents

  a front loading opening 3 aligned with the

  front 4 of the tank and on the front opening

  the outer furniture (not shown) of the machine

wash drying.

  The washing tub 1 has an inferior opening

  5 which is connected by a conduit 6 to a device

  filter, to the drain pump, and to a drain line (not shown) able to expel the laundry from

  the machine at the end of the washing and rinsing cycles.

  After the washing operation, the machine can perform in a known manner also the drying of the linen.

  ge by means of a stream of hot air that is circulated

  ler through the drum 2 and through the wet cloth

  and who is then sucked out of the tank and then dehumidified

  dified, reheated and returned to the tank 1.

-2626900

  For this purpose, a fan 7 is provided, the suction side of which is connected to the emptying duct 6.

  of the tank 1 by means of a con-

  densification 8 cooled by water, while the re-

  fan duct 7 is connected to a

  9 of the vessel 1 through a conduit 10 provided with

  heating ele- ments 11 with electrical resistance. The provision

  8, of known type, has a substantially tubular shape and is made by molding

  of a plastic material by blowing.

  The condenser 8 is connected to. the pipeline

  water supply via a conduit 12 and an electro-

  valve 13 which provide to a spray nozzle 14 the water necessary to create a condensation curtain

  serving. -condense the moist air from the tank 1.

  Cooling water and condensate water

  are then channeled through the inclined bottom.

  Densor 8 to the drain pump which has the function

to expel them from the machine.

  As already described in the preamble of the patent, the flow of air sucked by the fan 7 tends to cause the water sprayed in fog by the

  nozzle 14 and transport it in the drying circuit.

  In the condensation device 8 according to the in-

  vention, this disadvantage is removed by the fact that the water sucked by the fan 7 is intercepted by

  a plurality of annular enlargements 15 of the

  of the condenser body 8, which are provided in this

  body downstream of the nozzle 14, in the direction of circulation

  drying air (indicated by the arrows), - IN effect, tests of. laboratory have verified that the droplets of water transported by the drying air tend to be placed on the periphery of the airflow, under the action of the centrifugal force which is

  due to the helicoidal movement of the air stream.

  In this way, the water droplets

  appear in ring section enlargements

2626900-

  to cohesive forming larger drops that flow along the condenser 8 and to the pump

  emptying without being re-trained in the opposite direction

is by the current of air.

  * This provision makes it possible to eliminate or,

  least, to reduce the amount of water

  air-drying and at the same time simplify

  proudly build the condenser 8.

  In the figure, it is indicated by way of example -10 two enlargements section 15 but it is obvious that these enlargements can also be provided in a

  number of two without departing from the scope of the

  main feature claimed in the following.

  It is obvious that the device according to the invention

  tion may comprise several spray nozzles, just as it may advantageously find use

  in non-load washing machines

front.

  It goes without saying that various modifications may

  to be made available to the person skilled in the art who

  just described as a non-limiting example.

  mitative, in particular by substitution of technical means:

  equivalent, without departing from the scope of the

vention.

R E V E N DI CATI ONS

  1 - Condensation device for a combination machine

  for washing and drying laundry, in particular

  household-type and front-loading binding, comprising a tank in which a drum rotates about a horizontal axis, and is able to contain the laundry both during washing and during drying, a drying air circuit equipped with a fan that drives back

  dry, warm air to bring it into contact with

  ge, through a duct equipped with heating elements and that sucks hot and humid air through the opening

  of emptying the tank and through the con-

  densification, which is of substantially tubular

  and cooled by at least one spray nozzle fed by a solenoid valve connected to the water supply pipe, characterized in that the portion of the condensation device (8) which is placed between the fan (7) and the nozzle of spraying (14)

  the cooling water has a plurality of expansions

  annular grooves (! 5) of its cross-section.

  2 - Device according to claim 1, characterized

  characterized in that said annular section enlargements (15) are formed in a vertical portion of the

condensation device (8).