DE2526450A1 - Outlet air dehumidifier for clothes drier with closed air circuit - with low production cost and requiring little total space - Google Patents

Abstract

Outlet air dehumidifier for closed clothes drier comprises an air circuit with a circulating fan, in which the interior of the drier communicates via an air filter with a finned heat exchanger for the outlet air, the air circulating fan and a radiator. The pipe coil of the heat exchange for the outlet air forms part of a hermetically sealed circuit which is filled with a refrigerant which condenses at 15-25 degrees C and evaporates at 50-75 degrees C. A second finned heat exchanger situated above the first is subjected to the cooling outside air which is circulated by a room fan over an outside air filter. Pref. a pressure-equalising auxiliary gas e.g. H2 is also present in the refrigerant circuit. The air circulating fan and the room fan may be driven by a common motor.

Description

252645Q

BENTELER-tdBrke
AktiengBasllschaft
üJerk Neuhaus

Neuhaus Castle
Reaidenzstr. 1

Exhaust air dehumidifier for tumble dryers

P? "nPii (IRQ

Addendum to patent application Γ.Γ.77 ...

In the main application there is a device for exhaust air extraction in the case of closed drying machines described, bßi in the air circuit operated by the circulating air fan (2) the interior (1) of the dryer via the circulating air filter (3) the exhaust air lamellaBnuiärmBtauacher (4), dsm UmluftgablMaa (2) and the heating ragister (1D) is connected.

As is known, requires the installation of tumble dryers in inhabited rooms, especially in cakes and Baths special measures to dissipate the humidity, which is in the exhaust air coming from the dryer.

In Hauahaltüjäachetrocknern m can Aich this act, depending on the moisture content of the filled uläsche to moisture amounts kg up to 5 per dry process, the iuerden supplied to the installation space in a relatively short time, DIb dissipation of moisture to the outside iat cumbersome and generally not possible.

Ea are also known tumble dryers in which the Exhaust air or circulating air through a built-in, with room air cooled heat exchanger using the counter-flow or cross-flow method led and in this WBiae before the recirculation dehumidified to the dryer. The dimensions and the manu-

609882/0441

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2S2b4bU

stBllungakDatsn such air / air heat exchange br aind jBut noticeably. Experienced in another known method the exhaust air or the circulating air is passed through a container, Bings is flushed into the fresh water through nozzles and in the same way that in the air or circulating air Moisture condenses through cooling. This method has the disadvantage that the tumble dryer a fresh water connection is required and additional operating box caused by water consumption. In addition, there must be a large amount of total water a pump for transporting the water into the sewer pipe with safety devices, the bin overflow of the UaBsers by failure of the pump Shut off the fresh water supply and the drying area guarantee.

The advantage of such devices as proposed in the main application is that by using mass-produced lamellar hoods of relatively small structural dimensions, the overall space requirement is kept small and the production costs are kept low.

The present invention now brings a further development of the inventive concept. It consists in that the pipe coil is hermetically closed circuit (6), (5)) of the AbluftlamellenuärmBtauschBrs Ck component Bines which vaporized against a condensing between 15 and 35 ⁰ C and between 5D and about 75 ^D C refrigerant is filled odBr refrigerant mixture, and there is an enclosed lamellar heat exchanger (7) arranged above the exhaust air lamellar heat exchanger (.k), which in turn is exposed to the cooling outside air supplied by a room air blower (19) via an outside air filter (16).

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609882/0441

ORIGINAL INSPECTED

In the closed Kreialauf Aich 6 is a refrigerant that is condensed at temperatures between 15 and 35 ⁰ C in abenliegenden heat exchanger (7) and vaporized at temperatures between 50 C and 75 ^{D 0} C in the underlying heat exchanger Ck). The condensed refrigerant flows from dBm üiarmetauscher (7) in the heat from rather Ck), in which it evaporates and rises in vapor form into the heat exchanger (7).

Furthermore, an essential aspect of the invention is that in the circuit (6) in addition to the Refrigerant or the refrigerant mixture a pressure equalizing Auxiliary gas, e.g. hydrogen, is present.

Finally, by the invention Hermetically sealed design of the circuit and automatic mode of operation of the refrigerant via the change the liquid-gaseous state of aggregation made the entire system fail-safe.

The function of the inventive Bn Device explained:

From the interior (1) of the dryer, using a circulating air fan (2) via a circulating air filter (3), humid circulating air or exhaust air is fed to the exhaust air heat exchanger of the usual type.

The cooled and dehumidified or largely dehumidified air is circulated in the air circulation via the heating register (10) heated to the interior (1) of the dryer is fed back.

The coil (5) connects the exhaust air lamellar heat exchanger Ck) and the lamellar heat exchanger (7) in a closed circuit (6). The heat exchanger (7) is cooled by the room air conveyed by the room air fan (9) and the condensation of the vaporous water is thereby removed.

609882/0441 -k-

5 2 ^ 450

The one emerging from the exhaust air lamellar heat exchanger (* ») Circulating air or exhaust air is heated by a preferably electrically heated Haizregieter (10) the interior of the Dryer fed back.

G09882 / 0 /. 41

Claims (2)

-ti- 2525450 BEIMTELER-LdERKE
Stock corporation
lderk Neuhaua
4794 IMBuhaus castle
ResidBnzatr. 1 Patent claims: rl JUarrichtung for exhaust air drainage with closed Uläsch dryers with a closed circulation system according to patent application P 2 524 089.5 (Bi-440), characterized in that the pipe coil (5) of the exhaust air heat exchanger (4) is part of a hermetically closed circuit (6) which is connected to an intermediate 15 and 35 ⁰ C condensing and between 50 and approx. 75 ⁰ C evaporating refrigerant or oil mixture is filled and an enclosed lamellar heat exchanger (7) arranged above the exhaust air lamellar exchanger (k ) is located, which in turn is provided by a room air blower (19) Outside air filter (16) guided cooling outside air is exposed. 2. Device for exhaust air dehumidification accordingly Claim 1, characterized in that in the circuit (6) in addition to the Refrigerant or the KMliquid mixture a pressure-equalizing Auxiliary gas, e.g. hydrogen, is available. 609882/044 1 R Π si R ft 2/0 I- 58-00 AT: 13.O6.1975 OT: 13.01.1977