JPS6024202B2 - Helmet with thermoelectric cooling device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a helmet with a cooling device.

Workers are required to wear helmets to protect their heads when working under the blazing midsummer sun or near high-temperature melting furnaces.

However, although conventional helmets may solve safety problems, they ignore the unbearable heating of the worker's head.

For this reason, for example, an electric fan may be installed inside the helmet.
Although it has been proposed to cool the head of a worker, such helmets equipped with electric fans have problems such as noise, vibration, and increased weight. The present invention was made in view of the above-mentioned points, and its purpose is to provide a helmet that is lightweight and equipped with a cooling device with high cooling effect and that is comfortable to wear, in order to protect the head of a worker from the surrounding high heat. It is to provide.

The present invention provides a heat absorbing surface of a thermoelectric cooling device disposed on both inner surfaces of a helmet, a contact band made of a thermally conductive material and disposed along the inner surface of the helmet, both ends of which are connected to the heat absorbing surface on the inner surface of the helmet. An elastic body is placed around the contact zone on the inner surface of the helmet to prevent the contact zone from coming into contact with the helmet user's head; It has a structure consisting of a plurality of cooling fins extending outward from the heat dissipation surface, which protects the head of the worker from the surrounding high heat. This makes it possible to provide a helmet that is comfortable to wear.

Next, the present invention will be explained in more detail with reference to a preferred example shown in the drawings.

With the progress of the electronics industry, thermoelectric cooling devices that utilize the Beltier effect have become known.

That is, as shown in FIG. 1, a P-type semiconductor 1 and an N-type semiconductor 2
A plurality of pairs of thermoelectric elements are connected in series or in series and parallel with metal plates, and one metal plate is connected to a DC power supply 3 to constitute a heat radiation surface 4, and the other metal plate constitutes a heat absorption surface 5. A thermoelectric cooling device 6 is known.
One aspect of the present invention is that the electronic cooling device 6 configured as described above is placed below both sides of the helmet.

That is, as shown in FIGS. 2 to 4, the heat dissipation surfaces 4 of the thermoelectric cooling device 6 described above are arranged below the outer surfaces of both sides of the helmet 7, and a plurality of cooling fins 8 are disposed on the heat dissipation surfaces 4. The surfaces of the heat radiation surface 4 and the cooling fins 8 are anodized to ensure electrical insulation. In addition, heat absorbing surfaces 5 of thermoelectric cooling devices 6 are disposed below the inner surfaces of both sides of the helmet 7, and both ends of a contact band 10 are connected to these two heat absorbing surfaces 5. The contact zone 10' is made of a material with good thermal conductivity, and is shaped so that it can come into uniform surface contact with the user's head when the user wears the helmet 7. This contact strip 10 is formed from an aluminum plate or wire mesh having a wall thickness of approximately 0.5 to 1 rib, the end face is chamfered, and the surface is anodized. An elastic body 11 is disposed around the contact zone 10, and this elastic body 11 prevents the contact zone 10 from coming into contact with the user's head when the user puts on the helmet 7. It may be a known type in which a sponge is arranged on the surface of a styrofoam layer and the whole is covered with cloth.

Furthermore, a head holding member 12 is disposed within the helmet 7 to prevent the user's head from coming into direct contact with the inner wall surface of the helmet 7 and the heat absorbing surface 5 of the thermoelectric cooling device 6.

That is, the head holding member 12 is for reducing the impact of an external force when an external force acts on the helmet 7, and may be provided on a subordinate helmet. The thermoelectric cooling device 6 arranged on both sides of the helmet 7 is connected to a DC power source 3 via a lead wire 13, and the DC power source 3 is configured to be carried by the user. A switch may be provided between the DC power source 3 and the DC power source 3.

Further, as shown in FIG. 5, the contact strip 101 is provided with connection pieces 14 at both ends for connection to the heat absorption surface 5 of the thermal tortoise cooling device 6.

As shown in FIG. 6, this contact band 10 is bent into a shape that allows it to elastically and uniformly make surface contact with the user's head of the helmet 7, and the connecting pieces 14 at both ends are adhered to the heat absorbing surface 5 and are fitted along the inner surface of the helmet. It is arranged as follows. The two sets of thermoelectric cooling devices 6, in which heat from the human body is transferred to the heat-absorbing surface by conduction, each have a length of about 6 mm, a width of 4 mm, and a thickness of about 1 mm, and there is a P-type semiconductor inside.
and one or more thermoelectric element pairs made of N-type semiconductors 2 are arranged. Further, as shown in FIG. 7, a foamed plastic 9 with good heat insulation properties is filled between the metal slopes forming the heat dissipation surface 4 and the heat absorption surface 5, so as to reinforce the surroundings of the P-type semiconductor 1 and the N-type semiconductor 2. By doing so, oxidative deterioration of the semiconductors 1 and 2 can be prevented. When the user puts on the helmet 7 with the thermoelectric cooling device configured as described above, the elastic body 11 arranged around the contact zone 10 acts like a cushion, and then the contact zone 10 is placed on the user's head. In a state of complete contact, the user's head of the helmet 7 is held by the contact band 10, the elastic body 11, and the head holding part village 12, and the state in which the user is completely covered with the helmet 7 is maintained. .

When the user of the helmet 7 continues to work in such a state, the user can turn on or off the thermoelectric cooling device 6 depending on the ambient temperature to protect the head from the surrounding heat. can be protected and continue working comfortably.

Alternatively, a temperature sensor may be arranged inside the helmet 7, the temperature sensor inside the helmet may detect the temperature, and the temperature inside the helmet may be automatically adjusted to a predetermined temperature by turning the switch ON/OFF based on this detection signal. good. If the outside air temperature rises further and the heat dissipation by the cooling fins 8 from the heat dissipation surface 4 is suppressed, and the cooling effect is weakened, as shown in FIG. A removable heat insulating container 15 is arranged.

The heat insulating container 15 is open at the outer surface of the helmet 7, which is the surface that supports the cooling fins 8.
is cooled, which can reliably promote heat radiation from the heat radiation surface 4, and therefore can promote heat absorption from the heat absorption surface 5, so that the head of the user of the helmet 7 is reliably cooled. Insulating container 15
The cold soot stored inside may be dry ice or water, but
Basically, dry ice is preferable.

[Brief explanation of drawings]

Fig. 1 is a principle diagram of a thermoelectric cooling device, Fig. 2 is a side view of a helmet according to the present invention, Fig. 3 is an explanatory cross-sectional view of the helmet shown in Fig. 2, Fig. 4 is a back view of the helmet shown in Fig. 2, Fifth
The figure is a front view of the contact zone, FIG. 6 is a top view when the contact zone and thermoelectric cooling device are combined, FIG. 7 is a cross-sectional explanatory diagram of a modified example of the thermoelectric cooling device, and FIG. 8 is according to the present invention. FIG. 7 is a partially cross-sectional explanatory diagram of a specific example of a modification of the helmet. 4... Heat radiation surface, 5... Heat absorption surface, 6...
...Thermoelectric cooling device, 7... Helmet, 8...
...Cooling fin, 10...Contact zone, 11...
...Elastic body, 15...Insulating container. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Scope of Claims] 1. A contact made of heat-absorbing surfaces of thermoelectric coolers provided on both inner surfaces of the helmet and a thermally conductive material arranged along the inner surface of the helmet with both ends connected to the heat-absorbing surfaces on the inner surface of the helmet. a band, an elastic body disposed around the contact band on the inner surface of the helmet to prevent the contact band from coming into contact with the helmet user's head, and a heat radiation surface of the device provided on both outer surfaces of the helmet. , a helmet with a thermoelectric cooling device comprising a plurality of cooling fins provided on the heat radiation surface. 2. A removable heat-insulating container is provided on the outer surface of the helmet around the cooling fins, and the surface of this container that comes into contact with the outer surface of the helmet is open, so that a refrigerant can be stored inside the container. A helmet with a thermoelectric cooling device according to claim 1. 3. A helmet with a thermoelectric cooling device according to claim 1 or 2, wherein the thermoelectric cooling device is connected to a portable DC power source.