DE2440299A1 - LAUNDRY DRYERS - Google Patents

Description

.lwälta ·
j. H. Hauck .ys. W. Schmitz .. Ing. E. Graalfs pi. Ing. W. Wehnert pl. Phys. W. Carstens 8 Munich 15
Mozartstrasse 23

Jensen Corporation Hol N.W. 69th Street Fort Lauderdale, Florida 333o9 UNITED STATES.

2o. August 1974 Attorney File M-3 216

Clothes dryer

The invention relates to a device for treating laundry.

For laundry equipment in commercial enterprises or institutions

contains the item of laundry coming from the ironing machine in the re, gel excess moisture that should be removed before folding the item of laundry.

To date, the removal of excess moisture has usually been carried out by moving the laundry items over a steam-heated plate. The heating of such plates ■ to remove moisture with steam has in practice numerous

rich limits and disadvantages. The plate warms up slowly and can only be heated up to a temperature of around 100 C ". This relatively low temperature of the plate

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limits the speed with which the item of laundry can be moved over them, so that the desired removal of moisture is still achieved ^ and at the same time it requires that
the plate itself is relatively long so that the incoming laundry is exposed to its limited heating long enough,

remain. The water used as a source of steam must be continually

ι ι

j must be set, and in most places it must be dealt with! to remove mineral substances. Even with such a treatment of the water, the scale must be relatively frequent; be removed at regular intervals to avoid clogging of the _| Avoid steam pipe. In most cases that requires _; Steam plant, the constant presence of an engineer, which ensures the j safe and proper operation of the relatively complicated _(ed steam conditioning.,

In USrPS 2 375 »+26 a device is described which
for using hot oil in an iron for flat items of laundry
serves; in US-PS 2,435,521 and US-PS 3,066 U3o are hot oil | using ironing machines described; and in US Pat. No. 2,041,430, an ironing machine is described which works with the use of heated diethylene glycol. All these devices "make use of the fact that higher temperatures can be reached with such liquids than with steam, which has an advantageous effect."

The present invention meets a novel device
for the treatment of laundry that has an upward-facing, con-

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; vexe, by oil or other suitable liquid with high! Has boiling point heated plate. From the end where the Wä- | piece of laundry is placed on the plate up to the opposite end where the piece of laundry runs off the plate, the plate has a convex shape. An endless flexible belt conveyor I

ι I

[is located close to the upwardly convex surface of the plate7 met to the laundry item at a speed across the plate

'move away, which is much larger than would be possible with a steam-heated plate, the moisture to the same extent removed from the item of laundry, since the plate of the device according to the invention is operated at a higher temperature. By A long, tortuous channel in the plate is used to direct hot oil from the outlet side of the plate to its inlet side. One or more conveyors are arranged directly below the plate, which take up the item of laundry which is at the exit-I end of the plate runs down from it ·. The inlet and outlet lines carry the heated liquid to the tortuous channel in

, guide the plate, run in close proximity to this conveyor, so i
that the drying of the laundry is promoted after they have run down from the plate and as long as they are on these conveyors.

The invention is thus intended to provide a new and improved device for the treatment of laundry or a new and improved device for ironing are created, which a liquid

heated plate for removing moisture from the laundry having.

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2U0299

- 4 Furthermore, a device is to be created by the invention,

the whose plate has a novel heating arrangement to the Moisture from the item of laundry moved over the plate.

to remove optimally.

According to the invention, a device of the type mentioned above is also intended

will,
Creates a manner in which heated liquid is directed along a long, tortuous path in the plate which progresses along the plate in a direction opposite to the direction of advance of the laundry item along the plate

ι is.

Furthermore, a novel and improved j device for treating laundry is to be created by the invention, which ! a liquid-heated plate with a convex top surface and a flexible, endless belt conveyor, which in small Distance is placed above the top surface of the plate J in order to move an item of laundry forwards and at the same time on!

ί down the top surface of the plate along its convex path-j

I squeeze.

Finally, the invention is intended to provide a novel and improved

!

te device for the treatment of laundry are created, the ι

one arranged below a liquid-heated plate, and having conveyors receiving laundry items coming from the platen from the inlet conduit and the outlet conduit heated for the liquid associated with the plate

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is to additionally remove moisture from the laundry.

In the following an embodiment of the invention is under Be-I with reference to the accompanying drawing. It shows:

! Figure 1 is a side view of the device according to the invention, with the front of its housing broken away and some parts shown in simplified form for clarity

ι are;

FIG. 2 shows a central, vertical section along the line 2-2 i of FIG. 1, the central part being omitted;

¹ Figure 3 is a plan view of the inventive device, with some parts broken away for clarity;

FIG. 4 shows a vertical longitudinal section through the inventive I device, which along the line 4-4 of Figure 3 and J runs immediately behind the front wall of the device;

ι 5 shows a perspective view of our _(t of the device according to the invention from above, showing the oil heated plate and the conveyor arranged below it;

FIG. 6 shows a schematic view of the device for circulating. of the hot oil in the device according to the invention.

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As FIG. 1 shows, the device according to the invention has an elongated, upwardly convex, heated plate Io and conveyor which move an item of laundry, for example a bed sheet, from right to left over the curved upper side of this plate and then ^:

i carry the laundry away from the plate .. j

The upper track or the upper run of a through an endless, j

! flexible band formed infeed conveyor 11 runs under one

acute angle from right to left above to the right end

put the edge of the plate Io, then it runs down to an I. upper roller 12, which is located below this end of the plate.

is arranged and. then back to a lower roll 13. One free!

ι running roll IU is above the upper track of the infeed conveyor 11 arranged in the middle between the rollers 13 and 12. It presses the laundry item A onto this conveyor.

An elongated s formed by a flexible endless band second conveyor 15 is above and above the plate Io; entire convex curved area arranged away. The lower I career or the lower run, this conveyor is above the; arranged convex upper surface of the plate and touches the -j se. It runs in Figure 4 from right to left. With that she pushes!

the laundry item A on the plate and moves it at the same time from the right

to the left across the surface of the plate. In many cases; The laundry item contains a considerable amount of moisture

ge what increases its weight and what is due to gravity Press the item of laundry down onto the plate.

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'Favorable as long as this is moved along the curved area of the plate. The weight of the item of laundry is only taken up by the rigid plate; the overlying bands of ¹ conveyor 15 are only to necessary to the piece of laundry against the iobere surface to press the plate, as long as this along the! disk is moved forward, but does not serve to support! of the weight of the laundry article.

1 The belts of the upper conveyor 15 revolve around a roller 16, welr che are arranged above the roller 12 at the right end of the plate, and they revolve around a roller 17, which above of the left end of the plate is arranged after

j they run over the entire length of the convex surface of the plate are. From the roller 17 the belts of the conveyor run one after the other over rollers 18,19,2o and 21 through a return path or a

j return run, which is above the plate and behind the

! Roller 16 is arranged at a distance.

A short, flexible transfer conveyor with an endless belt 2 2 is arranged below the left-hand end of the plate Io!, So that it picks up the item of laundry A when this from

j runs down this end of the disk. The ribbons of this conveyor j are moved counterclockwise in FIG. 4, they run ! downwards around an upper roller 23, then vertically downwards

j to a lower roller 24 and then to the lower roller obenfum \ versa) and back again to the upper roller.

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A long conveyor 25 having a flexible endless belt runs clockwise around an upper roller 26 downwards,; those arranged to the left of the roller 23 and slightly above the same | ; is. The upper rollers 23 and 26 assigned to them are; Belts of the conveyor 22 or 2 5 spaced from one another sufficiently far so that they hold the item of laundry between them and

hindered take up, and then they run downwards closely opposite one another, so that they get the item of laundry between them; to grab. The belts 5 of the conveyor 2 run down under the roller 24 through I and then in the horizontal direction below the \ Io plate over almost their entire length to the right. The tapes '.

j of the conveyor 25 then run around a roller 2 7, which

ι arranged half and slightly to the left of the right-hand end of the plate is. Then they run in a lower return run in the horizontal direction to the left, over a lower roller 2 8 and

■ I

then around this roll and up to the top roll 26. ' The lower return run * of the conveyor 25 is at a small distance from its upper run.

'' A lower conveyor comprising a flexible, endless belt,

j j 29 has a horizontal upper runway (upper run),

. which is immediately below the lower return strand of the! ι conveyor 25 runs so that it picks up the item of laundry when i this runs around the roller 2 7, and it in horizontal Rieh-; device in Figure 4 promotes from right to left. The bands ües

'ι conveyor 29 run around a reversing roller 3o on the right

clockwise upwards, then walk horizontally

- Io - '

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-3.

to the left and finally down a reversing roller 31 \ on the left, before returning to the right side via a lower return run. A curved guide plate is at a short distance to the right of the roller 27 and above the right-hand one

ι reversing roller 3o arranged to put the laundry on the conveyor '

2 9 when it runs around roller 2 7.

: ι

The item of laundry A runs around the left-hand reversing roller 31 of the lower conveyor 29 down into a suitable one below

located, not shown laying device into it.

The various sponsors are continuously selected by a suitable one _; Not shown electric motor driven by which the infeed conveyor 11 counterclockwise, "the upper conveyor 15 jj clockwise, the short transfer conveyor 32 counterclockwise j ', the straight conveyor 25 clockwise and the lower Fc

ι Figure 4).

unpear the
lower conveyor 2 9 ^ is driven clockwise (cf.

In the preferred embodiment of the present invention the plate Io and the conveyors below it become 2 5 and 2b heated by oil in order to remove moisture from the laundry item as it passes through the device is moved.

As Figure 5 shows, the heated oil flows through an inlet pipe with a vertically extending section 32, which is arranged behind the 'plate Io, and with a horizontally extending section

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-K-

-40.

Portion 33 which extends below the plate and between the upper and lower raceways of the conveyor 25 from the front to '■ back of the plate, as best seen in FIG. 4 At the front of the device, the inlet pipe ■ has an upwardly inclined section 3 ¹ +, which extends from the front end of the horizontally extending section 3 3 of the inlet

laßrohres up and to the left as well as over the front of the j plate runs away in the vicinity of its left edge, welcne ' represents the exit side of the plate for laundry items moved over the convex upper surface thereof. ■

j The heated oil flows through j arranged inside the plate Io

! Canals, as described in detail later, and flows up ^;

; the front near the right-hand front edge of the ' Plate (this represents the entry side for items of laundry) from ■

ι the plate out and into a downwardly inclined section 3 5.

of an outlet pipe. The lower end of this pipe section is arranged to the left of its upper end and with the front end of a horizontal section 36 of the

laßrohres connected, which from the front of the plate Io ι to the rear of which is arranged running below the plate Io and between the upper and lower tracks of the conveyor 25 runs. The rear end of this horizontally extending section of the outlet pipe is vertical with the lower end of one running section 37 of this pipe, wel- |

I tend to run up on the back of the plate. j

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The inlet pipe 32 to 34 and the outlet pipe 35 to 37, which are | bring heated oil to the plate Io and lead away from it, \

a part of a circuit, which is shown schematically in Figure 6 j and will be discussed in detail later with reference to this figure.

is written.

The plate Io has a long, winding, inner channel

ι. i

'through which heated oil from the inlet pipe 32-34 between the front and the left side of the plate back and forth and progressively across the plate from right to left along the Convex surface of the plate over to the outlet tube 35 to 37 gelei-j

is tet.

As Figure 3 shows, this channel has a pair of inlet tubes 4o and 41, which are arranged closely together from left to right.

net and are joined together to form a body so that they are on the front of the plate form a common inlet chamber with | to which the inlet pipe 3 2 to 34 is connected. On the back of the Plate are the two inlet tubes 4o and 41 forming one body with each other and with the rear end of a third tube 42

verounden, which in the horizontal direction forward to the front

te of the plate runs, where it is molded onto a fourth tube 43

is. Subsequent horizontally extending tubes 44 to 49 and 5o 'to 56' are alternately on the back and the front

the plate joined together so that heated oil one after the other

from the front to the back and from the back to the front

side if it is along the plate in the drawing of

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j flows left to right. These consecutive tubes point all have an elongated cross-section, where they are ■ significantly wider in the horizontal direction than in the vertical direction and they ■ .are at a small distance from each other along the convex surface of the i '' Plate and are located directly below the upper

! side of the plate, as Figure 5 shows, so that the top of the plate

ite over its entire course from the front to the back and along its convex surface in the drawing by linxs

¹ I.

. I.

j is heated very well to the right. The heated oil emerges from the last tube 56 'at the right end of the plate and in ^{: the} inclined section located at the front of the plate ^! 35 of the outlet pipe.

I ^;

: The tubes 4o to 49 and 5o 'to 56', which are under the top of the ' Plate are arranged, provide a very long, tortuous path for the heated oil to pass the time during which between the oil i and heat exchange takes place on the top of the plate, if possible j to make big. The temperature gradient obtained by this arrangement of the tubes is the direction of movement of the item of laundry ! 'ι

! in the opposite direction across the plate. The oil is on! the left end of the plate, which is the exit side for;

represents an item of laundry, the hottest and the temperature of the; Oil slowly decreases as it flows on the winding path to the right-hand end of the plate, which is the entry side for a;

Item of laundry represents, riei this arrangement increases the temperature ! the plate from the entry side for the item of laundry (on the right

lying end) slowly along the convex surface up to the

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: Exit side for the item of laundry (end on the left) closed, which ^{ensures the best possible removal of moisture from the items of laundry 1} , which are conveyed along the top of the plate.

: ι

ι I

When the item of laundry moves along the convex surface of the plate, its weight is borne by the plate itself, , the belts of the conveyor 15 arranged above only hold it in Attachment to the plate in order to move it along the plate and at the same time to contribute to an ironing effect, through the FaI-!

can be removed from the item of laundry.

In addition to heating the item of laundry on the plate causes the heated oil at the same time a heating of the Wäscnestückes A, as long as it is on the conveyors 25 and 29 below the plate is because this conveyor is very close to the horizon-ι

i | valley running sections 33 and 36 of the inlet pipe and the

; The outlet pipe for oil is located.

iThe unit shown schematically in Figure 6 for supply and to IHeating aes oil has a suitable expansion vessel 5o with a ventilation 51 located above and a level switch 5 2 shown schematically. An expansion line 53 runs from the : Bottom of the expansion tank 5o to a line 5H, which through

ι a hand-operated shut-off valve 55 and an expansion sleeve 56 ι is connected to the inlet of a pump 57.

An opening 5 8 for filling the circuit is opened by a hand-operated

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operated shut-off valve 59 initially with a manually operated shut-off

• Check valve 60 connected, which is connected to line 54 on the inlet side of the shut-off valve 55 is connected, and then over a

Filter 61 and a hand-operated shut-off valve 62 with the outlet side of the shut-off valve 55 connected.

j The outlet of the pump 57 is through an expansion sleeve 63 and a manually operated shut-off valve 64 connected to the inlet side of a heater 65. A thermometer 66 measures the oil temperature on the

j Inlet side of the shut-off valve 64. The oil is heated in the heater and then flows through a manually operated shut-off valve 67 to a main line 68. A thermometer 69 measures the temperature ■

of the oil at the left-hand end of the main line 68 of FIG. 6.

j The heated oil flows through a flow switch 7o and a hand- : actuated shut-off valve 71, which is arranged in the main line 68 are, and then through an expansion sleeve 72 and a handoe- : activated shut-off valve 73 to the above-described inlet pipe 3 2 to 34, which opens into tubes 4o to 49 and 5o 'to 56', which are arranged in the plate Io. A thermometer 74 measures the temperature of the oil in the inlet pipe.

The coming out of the plate Io heated oil flows through _the: above-described discharge pipe 35 to 37 and by a handoetätig-! tes shut-off valve 75 to a return line 76 which is connected to line 54 by a manually operated shut-off valve 77. j A thermometer 78 measures the temperature of the oil in the outlet tube

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to 37.

ι A ßeipassventil 79 and an expansion socket 8o are in series!

with each other between the main line 68 and the return line 76 switched. ι

From the top of the expansion vessel 5o runs a cleaning

supply line 81 via a manually operated shut-off valve 82 to the return line 76, in which it is on the inlet side of the outlet ! Check valve 77 opens.

■ In the unit shown, the heater 65 heats the oil at least!

• to 2ob ^w C (400 ^u F), preferably to 370 "C (600 F) when going there,

¹ ι

enters the tubes Ho to 49 and 5o ' ■ to 56' arranged in the plate.

j The use of oil as a heating medium for the plate is contraindicated

J more advantageous in several respects than the one previously for the essentially

Steam-heated plates used for the same purpose. The oil can j

! to a temperature of 2o5 ° C (400 ° F) or more preferably ■

! heated to about 37o C (600 F). This allows the speed

The speed with which the conveyors run can be significantly higher than

j this would be possible with a steam-heated plate. Furthermore

! the length of the plate (from right to left in Figure 1)

^! be considerably smaller than that of a steam-heated plate with increasing ability to remove moisture.

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The use of oil instead of steam also avoids the maintenance problems associated with steam traps ; the need to treat the water used in the steam generator

falls. The costs associated with the accumulation of scale ^problems: me and maintenance work are completely eliminated and an ever Present engineer for the operation is not necessary. The ones with ^:

device operating on heated oil operates at much less

Pressure as a device that works with steam and is not subject to the regulations and standards that apply to pressure receptacles. ' The recirculated oil requires for a period of!

Years no replacement, while the water used in conventional steam systems is not used again and therefore stan-ι dig must be added. Because of the relatively small volume of the oil required, the oil according to the invention, with nutritional. oil-working system normally only about 10 minutes to ' to reach a temperature of 2o5 ° C (400 ° F) from the cold state j, while a plant using steam often ' on the order of 3o minutes after reaching the steam: r.pera-! door required to achieve a much lower plate operating temperature.

The heater 65 of the device according to the invention naturally has a much more effective heat exchange to the oil, which it heats up. than can be achieved with a steam generator.

As a result, the fuel consumption of this heater is large j smaller than that of a steam system with corresponding drying

capacity for laundry. The 01 flowing out of the plate can - 18 -

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if desired, can also be used to hot water or
Generate steam for another laundry facility.

i ι

I I

¹ - ι

5 09810/0804

Claims (1)

Claims ι (lj device for treating laundry with a plate having a broad upper surface, characterized by a device (15) for moving an item of laundry . over the upper surface of the plate (lo) and from one input side of the same to an opposite one
Exit page; and by means (34 to 49, So ¹ to 56 ', 5o to 82) for circulating heated liquid i the plate (lo) from its output end to its input end, ¹ whereby heat is given off at its upper surface in order to! Remove moisture from the piece of ash moving over the surface. Device according to claim 1, characterized in that the 509810 / Q8CK upper surface of the plate (lo) from the entrance side to the | I output side has a convex shape. 3. Apparatus according to claim 1 or 2, characterized in that j \ ■ i ; the means (15) for moving an item of laundry over the; Plate (lo) by a conveyor (15) with endless flexible
Band is formed, which at a small distance above the top! Surface of the plate (lo) from its entrance end to its »; Output end is arranged, and that the upper surface of the
'Plate (lo) from the input side to the output side has a convex shape. 4. Vorricntung according to one of claims 1 to 3, characterized in that that the heated liquid is oil, and that the . Line orientation (34 to 49, Sun ¹ to 56 ', 5o to 82) for circulation ; ren the liquid a device (65) for heating the \ üls to a temperature of essentially 2o5 ° C or more j : having. ' ; 5. Device according to one of Claims 1 to 4, characterized in that: shows that the plate (lo) arranged in it channels j ! (Ho to 49.5o 'to 56') for heated liquid, ' '· Which are essentially completely over the length and breadth i of the plate (lo) and just below the top surface ' ¹ I. same run. j 6. Apparatus according to claim 5, characterized in 'that the' 509810/0804 2U0299 \ Device (15) for moving the item of laundry over the plate l (lo) by a conveyor (IS) with an endless flexible belt! is formed, which is slightly above the O ! area of the plate (lo) from its input side to its Exit side is arranged, and that the upper surface of the plate (lo) is convex in the direction along which the laundry j piece is moved over it. 7. Apparatus according to claim 5 or 6, characterized in that the channels (4o Dis 49, 5o ^f to 56 ') have a winding channel ! have, which has interconnected channel sections ¹ , which transversely across the plate (lo) to the rear and front essentially : borrowed parallel to the axis of curvature of the upper surface of the plate (lo) and closely following one another along the [ convex surface of the plate (lo) from one end to:; i other are arranged. : ^! 8th . Device according to claim 7, characterized by means (32 to '' 3H) for introducing heated liquid into the channel (4o to 49, 5o 'to 56') which is located at the outlet end of the ^; Plate (lo) is arranged and by a device (3b to ! 37) to take over the heated oil from the channel (4o to 49, ! 5ο ¹ to 56 ') at the input end of the plate (lo) 9. Apparatus according to claim 8, characterized in that the daä Device for moving the item of laundry over the plate (lo) by a conveyor (lo) with an endless flexible belt 50981Ό / 080Α 440299 -to * j becomes, whichever is in close distance above the upper upper, Area of the plate (lo) is arranged from the input side to the j output side. Io. Device according to claim 1, characterized in that the | Plate (lo) has a canal running in it (4o to 49, 5o 'j to 5 6 ') that below the plate (lo) a conveyor (25) to pick up the from the output end of the plate (lo) 9 I. has running down laundry, and that a one ^! outlet pipe (32 to 34) and an outlet pipe (35 to 37) are each connected to opposite ends of the channel (4o to 49, 5ο ¹ to 56 ') running in the plate (lo) and are in the immediate vicinity of the underneath the plate (lo ) arranged j conveyor (25) run around the laundry on it _; piece to heat, so that additional moisture from the; Item of laundry is removed. 11. The device according to claim 8, characterized by a below the plate (lo) arranged conveyor (25) with an endless flexible belt and with an upper strand, through which an item of laundry running down from the exit side of the plate (lo) to one below the entrance side the place lying on the plate (lo), this conveyor (25) having a lower return run, which runs below the upper strand *; by another conveyor (29) with an endless flexible belt, the one below of the first-mentioned conveyor (25) is arranged and 509810/0804 has an upper run which is immediately below the lower run of the first-mentioned conveyor (25) through which the item of laundry is carried from the location below the entry side of the plate, (lo) to an output point which lies below the exit side of the plate (lo); and through an inlet pipe (32 to 34) and an outlet pipe (35 to 37), each with one of the opposite ends of the channel (Uo to 49, 5o 'to 56') running in the plate (lo) are connected and in the transverse direction below the 'plate (lo) between the upper and lower run of the first j called conveyor (25) run around the conveyor | to heat the items of laundry. ' & 09810 / 080A