JPH0765762B2 - Portable cooling fan - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cooling air blower for alleviating heat stress of an operator in a work environment in which occupational safety and health protection equipment, particularly impermeable protective clothing, is worn.

2. Description of the Related Art Conventional chemicals or nuclear disasters that cause harmful (toxic) pollution to humans cause people who are directly engaged in work to wear impermeable complete protective clothing and masks. I am ready to start work by preparing for the protection.

Problems to be Solved by the Invention When a protective posture is prepared by wearing a conventional impermeable protective suit and a gas mask, heat is accumulated because there is no escape area for heat generated in the body and heat stress is a problem. Become. Therefore, measures will be taken to change work before it becomes heat stress, but work efficiency will be greatly reduced, especially when saving lives, work speed is important, and reduction in work efficiency is fatal. There is a problem that becomes. This heat stress is due to the environmental temperature,
Although there are "high temperature tolerance standards" in industrial medicine depending on the conditions of clothing equipment, work load conditions, etc., the environmental conditions and the like in the present invention are fields far exceeding these tolerance standards. In particular, in the case of the above-mentioned disaster, it is naturally possible that there are severe conditions such as high temperature hot weather. For example, a work case where the workable time is 50 to 60 minutes as judged from the human rectal temperature rise at an air temperature of 30 ° C, wearing impermeable protective clothing, and moderate work (equivalent to energy metabolism rate RMR 4, walking at 6 km per hour). There is 1).
However, under the same conditions, in the case of a full protection system equipped with a full-face type protective mask, the workable time is half of the workable time mentioned in experience, and is at least 20%.
A 40 minute break (removing the mask and protective clothing to cool the body) is required for a minute of continuous work. This is empirically summarized in Table 1.

Problems to be Solved by the Invention As described above, especially in the summer, due to heat stress, only a very short period of work can be expected, so one person's work is changed by 3-4 people every 20 minutes. Will be engaged in the work. This greatly hinders work efficiency. Therefore, in general, an air line mask is used for the work, but the air line mask may not be applicable outdoors or outdoors. The present invention has been made for the purpose of solving the above problems.

Means for Solving the Problems In order to achieve the above-described object, the present invention has solved the problems by the invention of a portable air-cooling device for a cooling blower or a backpack-type air purifying and cooling device. In other words, the air cooled by the backpack type air cooling device by about 20 to 15 degrees by the outside air is forcedly blown into the complete protective clothing to lower the body temperature, and the heat from the accumulated body temperature is discharged to the outside to reach the heat stress. I made it possible to considerably extend the time to do.

Operation When the thermo module incorporated in the cooling mechanism of the portable air purifying and cooling device of the present invention configured as described above is caused to function by an external power source, heat is generated on the heat release side, so heat is released by the heat radiation fan. Take it away. Then, the heat absorption side is efficiently cooled, the heat of the refrigerant is absorbed, and the refrigerant becomes frozen with time. Next, when the blower blower is operated by another power source and air is applied to the frozen refrigerant, an appropriately cooled air is obtained, and this series of operations can be repeated.

EXAMPLE Next, an example of the present invention will be described. The main components of the present invention are a purification filter, a blower blower, a cooling part and a power supply part, which will be described with reference to the drawings. As shown in FIG. 1, the cooling mechanism constituting the cooling unit will be described with reference to FIG. 1. In this figure, 1 is a thermo module, 2 is a heat conducting member connected to the heat radiating side of the thermo module, and 3 is the same. A heat conducting member continuous to the heat absorption side, 4 is a heat radiation fan, 5 is a refrigerant (water), 6 is a blower blower, and 7 is a purification filter. FIG. 2 is an external perspective view of the device of the present invention.
The apparatus main body 8, a heat radiation fan 4, a heat radiation fin 9, an external power source socket 10, an air inlet 11, a battery 12, and a cooling air blower 13 are provided. The cooling air vent 13 is shown in FIG. 2A.
It is particularly configured as shown in FIG. 3 shown in a cross section taken along the line A. As shown in the cross-sectional view, inside the main body 8 of the thermo module 1, the heat radiating fins 9 are connected to the heat radiating side of the thermo module 1 to form the heat radiating side conductive member 2. A refrigerant container 14 is connected to the side to form a heat absorption side conductive member 3, and a cooling fin 15 is integrally provided at a required location on the outer peripheral surface of the refrigerant container to prevent external air sucked by a blower blower 6 from being blown out. After cooling with the purification filter 7, a cooling passage 16 for cooling it is constituted by the refrigerant container 14 and the cooling fin 15, and the cooling passage, the thermomodule 1
The heat absorbing side and the refrigerant container 14 are covered with a heat insulating material 17 and arranged.

The function of the device of the present invention is as follows. First, the external power cord is inserted into the socket 10 to activate the heat radiation fan 4 and the thermo module 1. When the heat generated by the thermo module 1 is radiated by the radiant air from the heat radiating fin 9 and the heat radiating fan 4, the heat absorbing side of the thermo module 1 absorbs the heat of the refrigerant and cools the refrigerant. The coolant uses water (tap water) that has a large heat capacity and is inexpensive, and uses the coolant container 14 and the cooling fins 15.
Has excellent thermal conductivity and is made of aluminum in consideration of weight reduction. The refrigerant completely freezes after a few hours have passed after the operation of the thermo module 1, so that the cooling blower is ready for use at this point. Then, the external power cord is removed and the apparatus body 8 is operated. The power source is the device body 8
The polluted air sucked from the air suction port 11 by the operation of the blower blower 6 is purified by the purifying filter 7, is blown around the refrigerant container 14, and is further effectively cooled by the cooling fin 15. It is cooled and blown from the cooling air blowing port 13.

FIG. 4 shows a state in which the device body 8 of the present invention is actually used as a backpack. Reference numeral 18 indicates a connecting duct, and 19 indicates a backpack belt. In the use state, the cooling air is blown to the occipital region (brain stem portion) of the worker through the connecting duct 18. Since the device 8 which has been used has a temperature rise of the refrigerant and discharge of the battery 12 (secondary battery), it needs to be regenerated before the next use. However, this regenerating operation is performed by connecting the external power cord to the socket 10. It can be achieved by incorporating it.

Effects of the Invention The cooling effect based on the above-described embodiment is as shown in FIG. External air temperature of 3 with 200 liters of airflow per minute
As a result of continuously blowing air at 0 ° C for 1 hour, cold air at 10 ° C to 16 ° C could be continuously supplied. Comparing this with the workable time, it can be seen from Table 1 above that the work is performed at 30 ° C., in the case of medium work, without the device according to the present invention, it takes 40 minutes in 20 minutes.
Although a break for a minute is required, using the apparatus according to the present invention, a break of 10 minutes is required for a 60-minute work, which has the effect of significantly reducing heat accumulation and greatly improving work efficiency. Also, after reusing the device after use, it was carried out at a temperature of 25 ° C with a refrigerant (water) capacity of 1.5 and a commercial power supply of 100 VAC, and after 10 hours, the refrigerant was frozen at -3 ° C and transferred to a secondary battery. Was fully charged.

From the above, the device of the present invention can be repeatedly used and reproduced, and can be repeated many times, so that the life of the device is semi-permanent and provides a very inexpensive and lightweight portable cooling device. is there.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a cooling mechanism of the present invention, FIG. 2 is an external perspective view, FIG. 3 is a sectional view taken along the line AA in FIG. 2, and FIG. 4 is an exemplary view showing an embodiment of the present invention. FIG. 5 is a graph showing the cooling effect by the device of the present invention. 1 ... Thermo module, 2 ... Heat emission side conductive member, 3
...... Heat absorption side conductive member, 4 ...... Radiation fan, 5 …… Refrigerant, 6 …… Blower, 7 …… Cleaning filter, 8 …… Main body, 9 …… Radiation fin, 10 …… Sket for external power supply , 11 …… Air inlet, 12 …… Battery, 13 …… Cooling air vent, 14 …… Refrigerant container, 15 …… Cooling fin, 16
…… Cooling passage, 17 …… Insulation material, 18 …… Connection duct, 19…
... a backpack belt. Note) 1. Kenji Yoshino, Experimental research on prediction of thermal stress occurrence in high temperature workers, Occupational Medicine, 1987, 29, p.466-47.
9.

Claims (2)

[Claims] 1. A thermo module for a cooling unit, a cooling mechanism operated by an external power source using water as a refrigerant, a device composed of a blower and a filter operated by a secondary battery, and purified hot air from the blower, And a device for supplying cold air to the human body by the cooling mechanism.
Portable cooling blower. 2. The portable cooling air blower according to claim 1, wherein the secondary battery is also charged when the refrigerant is frozen by an external power source.