Classifications

• • A—HUMAN NECESSITIES
  • A43—FOOTWEAR
  • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
  • A43B3/00—Footwear characterised by the shape or the use
  • A43B3/34—Footwear characterised by the shape or the use with electrical or electronic arrangements
  • A43B3/35—Footwear characterised by the shape or the use with electrical or electronic arrangements with electric heating arrangements
  • A43B3/355—Footwear characterised by the shape or the use with electrical or electronic arrangements with electric heating arrangements heated by an electric current from an external source, e.g. car batteries

Definitions

• the invention relates to a shoe with a shoe upper and a sole which has a heat-emitting device.
• Such shoes with an electrically heated sole construction are known for example from DE-OS 25 49 375.
• Such shoes with an electric heating system are operated with electric batteries or electrochemical accumulators. These have the disadvantage of a low energy density, so that the batteries or batteries required for heating the shoes have a considerable weight.
• the invention is based on the object of creating a shoe which is able to give off heat in a simple and safe manner in order to avoid hypothermia of the feet and which is at the same time capable of excess Dissipate foot warmth.
• the sole consists of a sole body in which a latent heat storage block is housed, the transformation point of which is below the foot temperature.
• the latent heat storage block preferably consists of a battery of storage bodies which contain paraffin.
• the arrangement of the storage body between the insole and the outsole has the effect that the latent heat store serves to compensate for the heat losses of the shoe to the outside.
• the choice of paraffin is made so that it solidifies a few degrees below the foot temperature.
• the latent heat store between the foot and the environment limits the heat dissipation of the foot due to the small temperature difference between the foot and the heat store and compensates for the losses by its discharge Outside.
• this arrangement has the advantage that overheating in the shoe is avoided since the partially discharged accumulator absorbs the heat again.
• the power output of a foot fluctuates extremely from about 10 mW / cm 2 when sitting, 20 to 30 mW / cm 2 when running and up to 100 mW / cm 2 when climbing stairs.
• FIG. 1 shows a shoe or boot according to the invention in longitudinal section
• Fig. 2 shows another embodiment in one of the
• FIG. 3 shows a section of a single chamber in the sole body with a storage body produced in the form of a winding * ,
• FIG. 4 shows a plan view of the inside of the sole body to illustrate the cross-sectional shape of the chambers and the storage body
• FIG. 5 shows a further exemplary embodiment of a shoe or a boot in a representation corresponding to FIG. 1 and
• FIG. 6 shows a modified embodiment in a representation corresponding to FIG. 5.
• 1 shows a shoe boot with a shoe upper 1, a front blade 2 and a front cap 3 and a sole body 4.
• the sole body 4 forms an outsole 5 and a shoulder 6.
• an insole or inner sole 7 is provided, by means of which the underside of the foot is supported.
• a flexible electrical resistance heater in the form of a self-regulating film heater 8 is provided below the insole.
• the foil heater 8 is connected via electrical lines 9, which are shown in broken lines in FIG. 1, to a plug socket 10, which is used for connection to a voltage source with, for example, 12 volts.
• a fuse is preferably provided in the socket 10.
• the socket 10 is secured by a closure flap against the ingress of dirt and water.
• the inside of the shoe is lined with a lining 11 in order to avoid heat losses to the outside.
• the sole body 4 has a web structure which can be seen in FIGS. 1 and 4 and has a multiplicity of chambers 12. While in the area of paragraph 6 the chambers 12 are formed as hollow chambers, which are closed at the top by the insole 7, the chambers 12 in the front area of the sole body 4 are filled with individual storage bodies 13, which together form a latent heat storage block 14, the rever ⁇ sibel works.
• a material which has a solidification point and a melting point in the range between 15 and 30 ° G is used as the latent heat storage material. The material is selected so that its freezing point is a few degrees below the individual foot temperature of the shoe wearer, which is between 28 and 29 ° G for men and between 24 and 25 ° G for women. Smokers can have foot temperatures 6 to 7 ° C lower.
• the latent heat storage block 14 serves to compensate for the heat losses of the shoe to the outside, in particular in the forefoot area.
• Paraffins covering the temperature range discussed above can be used as the material for the heat storage block. Paraffins have the advantage of high energy density and physiological harmlessness. Well suited for men with normal foot temperatures is n-octadecane C- ⁇ gH, g with a melting point that is in the range of 25 to 26 ° C with technical purities.
• a lower-melting paraffin, for example heptadecane C-H, g, is used for women. The energy density of such paraffins is in the range of 60 to 70 Wh / kg.
• the choice of the latent heat material with a heat emission temperature below the foot temperature prevents the foot from cooling down when there is little physical activity.
• the web structure of the sole body 4 which can be seen in FIGS. 1 and 4 has a distance between the individual webs 15 in a range between 1 and 4 cm.
• the chambers 12 can also have a different shape.
• the webs 12 have a wall thickness which is sufficient to absorb the mechanical pressure of the foot.
• the chambers 12 are as large as possible.
• the webs 15 are part of the sole body 4 in the embodiment shown in FIG. 1. In the embodiments shown in FIGS. 5 and 6, the webs 15 form a separate inserted component.
• the chambers 12 between the webs 15 are filled with individual storage bodies 13 in the embodiment shown in FIG. 1.
• the storage bodies 13 can be constructed, for example, in the manner discussed in connection with FIG. 3.
• the top of the chambers 12 is closed with a thin, vulcanized-on mat 16. If the chambers 12 are filled with a nonwoven and a heat-conducting material in the manner described below, a multiplicity of individual closed chambers 12 are formed when the mat 16 is vulcanized on are introduced, which are inserted through the mat 16. The puncture points in the mat 16 are sealed after cleaning with a solvent using a layer adhesive. Then the film heater 8 is applied and the insole 7 is inserted.
• the web structure above the shoulder 6 can also contain another filling, in particular made of a polystyrene foam.
• a sole body 4 with a web structure is also provided, as can also be seen in FIGS. 1 and 4.
• Other parts corresponding to the exemplary embodiment according to FIG. 1 are given the same reference numerals in FIG. 2 as in FIG. 1.
• the storage bodies 13 are enclosed between an upper flexible mat 17 and a lower flexible mat 18.
• Plastics in particular NBR rubbers, are suitable as materials for these mats 17, 18, since they are flexible and paraffin-impermeable.
• the upper mat 17 extends only over the front foot area.
• the lower mat 18 forms a multiplicity of receiving spaces in which the storage bodies 13 have space and which can be pressed into the chambers 12.
• the depth of the chambers 12 is chosen such that after the latent heat storage block 24 formed in the manner described above has been fully pressed in, air chambers 20 are formed between the lower mat 18 and the bottom 19 of the chambers 12. These air chambers 20 provide additional thermal insulation to the outsole 5.
• the lower mat 18 extends along the webs 15 to the upper mat 17, with which it is firmly connected in the region of the end faces of the webs 15.
• the latent heat storage block 24 formed in this way is extremely flexible and can easily be inserted into the spaces between the webs 15 formed by the chambers 12.
• a film heater 8 is provided which covers the latent heat storage block 24.
• An insole 7 extends over the entire sole body 4.
• FIG. 3 shows an enlarged representation of a memory body 13 as it can be used to create the latent heat storage block 14 for the exemplary embodiment shown in FIG. 1 or the latent heat storage block 24 for the exemplary embodiment shown in FIG. 2.
• the upper mat 17 and the lower mat 18 and the air chamber 20 between the webs 15 are shown in FIG. 3, these parts can be modified as shown in FIG. 1.
• the storage body 13 according to FIG. 3 consists of a two-layer winding, the first layer being an absorbent material, in particular a fine-pored plastic fleece 30.
• the plastic fleece 30 is impregnated with paraffin or is subsequently impregnated with paraffin.
• a copper foil 31 is provided as the second layer.
• the use of the fine-pored plastic fleece allows the paraffin to be fixed even in the liquid state. As a result, there is no movement of the liquid paraffin and thus no convective heat transport. In addition, there is less risk of leakage if the thin mat 16, the upper mat 17 or the lower mat .18, which are preferably made of rubber, are damaged.
• the installation of the copper foil 31 serves to improve the heat conduction within the storage body 13.
• the plastic fleece 30 and the copper foil 31 become a roll wrapped, the strips used are the same width, but are wound somewhat offset.
• the copper foil 31 thus protrudes somewhat at the top and is bent upward to improve the heat transfer in the manner shown in FIG. 3.
• the lowest area as can also be seen in FIG. 3, there is no copper foil 31 and the heat conduction there is correspondingly lower.
• the areas of different heat conduction are important in order to be able to load and unload the storage material of the storage body 13 from above and to minimize the losses downwards.
• a high mechanical flexibility is achieved by the segmentation of the storage material, which can be seen particularly in FIG. 3, since the area between two storage bodies 13 acts as a joint.
• FIG. 4 it can also be seen that, with a constant grid dimension, different shoe sizes can be equipped with storage material by adding or removing storage bodies 13.
• the air chamber 20 shown in FIG. 3 between the sole and the storage body 13, in addition to improving the thermal insulation, causes volume changes in the storage material to be absorbed in the event of phase changes.
• the construction can also be chosen such that two nonwoven materials are used to achieve zones of different thermal conductivity, the usual poorly conductive nonwoven being used in the lowest region, while for the highly conductive part a fleece consisting of plastic and metal fibers is used. It is also possible to add other non-conductive additives, e.g. metal foils, wires, wire nets, flakes and powder to increase its thermal conductivity. A deterioration in the heat conduction can be achieved by using flakes and powders which are poorly heat-conducting. In addition, the thermal conductivity can be influenced by a thickening of the lower mat 18.
• FIG. 4 shows the rectangular or square structure within the web structure with the webs 15 and the chambers 12, which are empty in the area of the heel or are filled with polystyrene foam and which have the storage bodies 13 in one in the front area of the ways described above.
• windings made of fleece 30 and copper foil 31 impregnated with paraffin are shown.
• the area heated by the foil heater 8 is illustrated in FIG. 4.
• the sole body 4 has a relatively large recess 40 in the front region, while the web structure with the webs 15 is provided in the region of the heel.
• the recess 40 is lined on its bottom 41 with a felt sole 42.
• a latent heat storage block 44 is inserted from above into the recess 40 lined in this way.
• the latent heat storage block 44 does not have individually packaged storage bodies 13, but instead has a single packaging comprising an upper flexible outer skin 45 and a lower one flexible outer skin 46. Between the outer skins 45 and
• a web grid 47 is inserted, which has no fixed connection to the outer skins 45 and 46 on its end faces.
• the lower flexible outer skin 46 also forms side walls for the storage body 13 lying on the edge of the latent heat storage block 44.
• FIG. 6 shows a modification of the exemplary embodiment according to FIG. 5.
• the same components are again identified by the same reference symbols.
• a recess 40 is provided inside the sole body 4, into which a latent heat storage block 54 can be inserted.
• the felt sole 42 is located below the latent heat storage block 54 in order to achieve good thermal insulation with respect to the outsole 5.
• the latent heat storage block 54 contains a web grid 47 as in the embodiment shown in FIG. 5, but the upward and downward edges of the web grid 47 are firmly connected to the upper flexible outer skin 45 or the lower flexible outer skin 46.
• the chambers within the web grid 47 are filled with individual storage bodies 13 in one of the ways described above. Each chamber in the web grid 47 is self-contained since the individual webs of the web grid 47 form walls which are fixed on the outer skins 45, 46 at the top and bottom.
• the webs of the web grid 47 are sealed, for example by gluing or vulcanizing, to the outer skins 45, 46, which thereby form the floor and ceiling for the chambers.
• the top skin 45 should be thin, e.g. 0.5 to 1 mm to allow good heat flow.
• the lower outer skin 46 is thicker, for example 3 to 5 mm thick, in order to obtain a high thermal resistance in the lowest area.

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• Engineering & Computer Science (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6300869

Family Applications (1)

Country Status (5)

Families Citing this family (7)

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• 1986
  • 1986-05-15 DE DE19863616326 patent/DE3616326A1/de active Granted
• 1987
  • 1987-05-15 JP JP62503127A patent/JPH01500171A/ja active Pending
  • 1987-05-15 WO PCT/DE1987/000225 patent/WO1987006803A1/de not_active Application Discontinuation
  • 1987-05-15 EP EP87903240A patent/EP0269661A1/de not_active Withdrawn
• 1988
  • 1988-01-04 FI FI880006A patent/FI880006A/fi not_active IP Right Cessation

Non-Patent Citations (1)

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