JP6201649B2 - Air-driven human body cooling system - Google Patents

Description

The present invention workers to work in a high temperature environment about air driven body cooling system used to protect against high heat.

  2. Description of the Related Art A human body cooling system that supplies cooling air to the inside of work clothes worn by workers in order to protect workers who perform work in a high-temperature environment from heat stroke is known. However, when a spark generated by welding work or the like ignites the work clothes, there is a problem that combustion is accelerated by the air supplied to the work clothes and there is a possibility of causing burns.

  Further, as shown in Patent Document 1, a system for cooling a human body by circulating a cooled liquid medium through work clothes has also been proposed. However, in the system of Patent Document 1, a liquid medium cooled by using a Peltier device or a pump is circulated, so that a power source is required. For example, an electric wire is required for use at a high temperature work site such as the inside of a furnace body. There was a risk of electric shock if the wire coating was damaged.

  It is also possible to install a Peltier element or pump outside and circulate the cooled liquid medium from a distance using a heat-resistant hose. In this case, however, the temperature of the liquid medium increases during the circulation. In addition, there is a possibility that the cooling effect may be reduced, and when the hose is lengthened, the pressure loss becomes large and the flow rate of the liquid medium is reduced, so that a sufficient cooling effect cannot be obtained. If a large amount of liquid medium is supplied with a powerful pump, sufficient human cooling is possible even from a distance, but a large refrigerator or storage tank is required to cool a large amount of liquid medium. Is inferior in portability, so even if it can be used in a fixed work environment, it is not suitable for work while moving in a wide area in the factory.

  In addition, there is a method in which a cooling agent is attached to the work clothes, but since the cooling effect is lost in a short time, it is not practical when the work time is long.

JP 2006-61440 A

  Therefore, the object of the present invention is to solve the above-mentioned conventional problems, and does not require a power source, a compact air drive that can efficiently and safely cool a human body working in a high temperature environment. To provide a human body cooling system.

The air-driven human body cooling system of the present invention made to solve the above problems is a system that circulates cooling water between the cooling vest worn by the worker and the cooling device body to cool the human body of the worker. The cooling device body includes a vortex tube that blows cold air into the water tank and an air-driven pump that supplies the cooling water in the obtained water tank to the cooling vest, and the water tank is formed by a vortex tube. The present invention is characterized by comprising bubbling means for blowing the obtained cold air .

The invention of claim 2 is characterized in that, in the invention of claim 1, the bubbling means is spiral .

  The invention of claim 3 is characterized in that, in the invention of claim 2, the bubbling means is arranged between the cooling water inlet at the upper part of the water tank and the outlet at the lower part of the water tank.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the cooling vest is provided with a transverse tube through which cooling water circulates.

  The invention of claim 5 is characterized in that, in the invention of claim 1, a check valve for preventing a back flow of cooling water is provided in the cooling vest.

  The invention of claim 6 is characterized in that, in the invention of claim 1, the vortex tube is arranged outside the housing of the cooling device main body.

  The invention of claim 7 is characterized in that, in the invention of claim 1, cooling water is supplied to a plurality of cooling vests from one cooling device main body.

According to the system of the present invention, the water supply to the cooling vest water in the water tank is cooled by blowing cold air by vortex tube inside the water tank, the operator by the resulting air driven pumps the cooling water in the water tank to wear To do. For this reason, a power source is unnecessary as long as there is a compressed air source, and there is no danger of electric shock when working in a high heat environment such as the inside of a furnace body. In addition, since it is the cooling water that is supplied to the cooling vest, it is safe even if the work clothes are ignited. Further, since the cold air obtained by the vortex tube is blown into the water tank through the bubbling means, the contact area between the cold air and the water is increased, and the cooling water can be obtained efficiently.

At this time , if the bubbling means is arranged between the cooling water inlet at the upper part of the water tank and the outlet at the lower part of the water tank as in the invention of claim 3, the cooling water flows from the upper part to the lower part of the water tank, and the cold air flows from the middle stage of the water tank. By flowing upward, it becomes an efficient counter-flow heat exchanger structure, and the temperature of the cooling water flowing out can be lowered as much as possible. In addition, since the cooling air flowing out is not accompanied by cold air bubbles, the air bubbles do not adhere to the flow path of the cooling water to prevent the circulation of the cooling water.

  If the cooling vest is provided with a traversing tube through which the cooling water circulates as in the invention of claim 4, even if the tube is bent forward during the operation, the circulation of the cooling water is hardly hindered. . Further, if a check valve for preventing leakage of cooling water is provided in the cooling vest as in the invention of claim 5, there is no risk of water leakage even when a water supply hose is attached or detached.

  If the vortex tube is arranged outside the casing of the cooling device body as in the invention of claim 6, the warm air separated from the cold air by the vortex tube does not heat the inside of the casing of the cooling device body. .

  If the cooling water is supplied to the plurality of cooling vests from one cooling device main body as in the invention of claim 7, a single cooling device can cool the human bodies of a plurality of workers. it can.

It is explanatory drawing of the whole system of this invention. It is explanatory drawing of the vortex tube used for this invention. It is sectional drawing of a cooling device main body. It is explanatory drawing of a water tank and a bubbling apparatus. It is explanatory drawing of a cooling vest. It is explanatory drawing of a cooling vest. It is explanatory drawing of the system which supplies cooling water with respect to several cooling vest. It is explanatory drawing of the system which supplies cooling water with respect to several cooling vest. It is a graph which shows a cooling effect.

Embodiments of the present invention will be described below.
FIG. 1 is an explanatory diagram of the entire system of the present invention, wherein 1 is a cooling device main body, and 2 is a cooling vest worn by an operator. As will be described in detail below, the cooling device main body 1 and the cooling vest 2 are connected by a pair of hoses 3 so that the human body of the operator can be cooled by circulating cooling water. The hose 3 is assumed to have a heat-resistant and heat-insulating structure so as to suppress an increase in the temperature of the cooling water flowing through the hose 3. The pair of hoses 3 consists of a water supply hose and a drain hose for the cooling vest 2 and can be separated from each other. It is desirable to provide a single hose that is tie-joined with a sufficient thickness of the insulating material between them. In this embodiment, the most easily available water is used as the cooling medium. However, it is possible to mix it with antifreeze or replace it with another refrigerant that does not harm the human body or the surrounding environment even if it leaks from the cooling vest or hose. It is.

  The casing 10 of the cooling device main body 1 has a heat insulating structure surrounded by a heat insulating material, and a water tank 11, an air driven pump 12, and a pressure reducing valve 13 are provided therein. A vortex tube 14 is disposed outside the housing 10. Reference numeral 15 denotes a compressed air inlet, which supplies 0.2 to 1 MPa of compressed air to the pressure reducing valve 13. Since the compressed air having such pressure is usually widely piped in the factory, in many cases, it can be easily taken in from the compressed air pipe in the vicinity of the cooling device main body 1.

  A part of the compressed air decompressed to an appropriate set pressure (for example, 0.2 to 0.3 MPa) by the pressure reducing valve 13 is supplied to the air driven pump 12 as a power source, and the remaining part is supplied to the vortex tube 14.

  The vortex tube 14 itself has been known for a long time, and is a device for supplying cold air from the nozzle 16 to the inside of the main body 17 in the tangential direction as shown in FIG. The compressed air blown into the main body 17 from the nozzle 16 adiabatically expands to generate a supersonic or subsonic swirling flow. While the enthalpy of the outer peripheral portion of the swirl flow increases, the enthalpy of the central portion decreases, so that cold air and warm air are separated, and the warm air is discharged from the tip of the tube 18 to the right in FIG. Discharged from the side. Warm air is released into the atmosphere, and cold air is supplied to the water tank 11. Reference numeral 19 denotes a warm air flow control valve. Although the temperature of the cold air depends on the operating conditions, it is easy to set it to around 0 ° C., but the pressure is adjusted to an appropriate set pressure by the pressure reducing valve 13 so that the cooling water is frozen and the circulation is not hindered. In this embodiment, the vortex tube 14 is disposed outside the casing 10 of the cooling device main body 1 to prevent warm air of 50 to 70 ° C. discharged from the vortex tube 14 from heating the inside of the casing of the cooling device main body 1. doing.

  As shown in FIG. 3, the water tank 11 has an inlet 22 at the top, an outlet 23 at the bottom, and a compressed air supply port 29 at the middle. A bubbling means 20 as shown in FIG. 4 is provided inside the water tank 11, and cool air supplied from the vortex tube 14 through the compressed air supply port 29 is blown into the water. The cold air blown from the bubbling means 20 rises in the form of bubbles, but during that time heat exchange is performed on the surfaces of the bubbles to lower the water temperature. Since the total surface area of the bubbles is very large, it is possible to efficiently reduce the water temperature and obtain low-temperature cooling water. For example, when the capacity of the water tank 11 is 4 liters, if a 0.2 MPa compressed air source is used, 35 ° C. water can be cooled to 7 ° C. in one hour, and a 0.3 MPa compressed air source can be When used, water at 35 ° C. could be cooled to 5 ° C. or less in 1 hour. Thus, although there is no problem in the temperature level of the cold air or the cooling water, it is difficult to cool the water staying in the water tank, the hose, or the cooling vest in a short time, so ice is put in the water tank 11 at the start of cooling, It is effective to circulate ice water throughout the system and reduce the temperature of the stagnant water at once. With this method, the temperature can be adjusted to a predetermined cooling water temperature within 5 minutes from the start of circulation.

  Although the structure of the bubbling means 20 is not particularly limited, for example, a structure in which a large number of air holes 21 are formed in a spiral tube as shown in FIG. 4 can be used. Furthermore, it is effective to dispose bubbles and reduce the diameter by disposing steel wool having an appropriate thickness above the bubbling means 20. The bubbling means 20 is preferably arranged near the bottom of the water tank 11. This is because the air bubbles rising from the bottom of the water tank are brought into contact with the cooling water for as long as possible to exchange heat. However, when some of the bubbles flow out from the outlet 23 and reach the transverse tube 24 of the cooling vest 2, the bubbles may adhere to the thin transverse tube and hinder circulation of the cooling water. The bubbling means 20 is arranged at a position 30 mm higher than the outlet 23 to prevent the bubbles from flowing out. Cooling water from the cooling vest 2 flows into the water tank 11 through the inlet 22 and is sent out from the outlet 23 to the air-driven pump 12. The water tank 11 has a heat insulating structure so that the temperature of the cooling water can be maintained at a low temperature even when the cooling device body 1 is installed in a high temperature environment of 50 ° C. or higher. A cooling air outlet having a diameter of about 12 mm is provided in the upper part of the water tank 11, and steel wool is packed therein. The steel wool prevents the water droplets accompanying the cold air from scattering and prevents the cooling water from spilling at once even if the water tank 11 rolls over.

  The air-driven pump 12 is driven by using compressed air supplied from the pressure reducing valve 13 as a power source, and sucks cooling water from the water tank 11 and discharges it to the hose 3. Thus, in the present invention, the cooling water is circulated without using electric power, so there is no need to draw an electric wire into the place of use. When the number of cooling vests 2 is one, it is desirable to use an air driven pump 12 capable of discharging 0.35 liters or more per minute. It is possible to increase the cooling water circulation rate to increase the cooling effect, but sparks may jump from the gaps in the work clothes during the welding process, causing holes in the traversing tube. If water leaks, there is a possibility of electric shock, so a small amount of water will gradually leak and the skin will get wet so that the worker will notice it and change to a different cooling vest. Yes.

  The cooling vest 2 to which cooling water is supplied through the hose 3 is attached with a transverse tube 24 through which the cooling water circulates as shown in FIG. In this embodiment, the cooling water is first divided into the left and right sides of the vest at the joint 27 and supplied to the neck portion 25, then flows through the body portion 26, joins at the joint 28, and is discharged. Since there is an artery that supplies blood to the brain at the neck of the human body, it is important to cool this part, and cooling the neck 25 provides a cooling feeling superior to cooling the body 26. Can do. By setting it as the transverse tube 24, even when working with forward bending, the tube is hardly broken and the circulation of the cooling water is hardly hindered.

  FIG. 6 shows another embodiment of the cooling vest 2. The cooling vest 2 shown in FIG. 6 is one in which the length of FIG. 5 is shortened by about 200 mm, and the transverse tubes 24 are added at narrow intervals to enhance the cooling of the side, chest, and shoulders. In this embodiment, the fabric of the vest is changed from cotton to a synthetic mesh material, and a large cutout is provided on the chest, back and shoulders to improve air permeability and improve the wearing feeling of workers. . Moreover, a worker's cooling feeling can be adjusted by changing the close_contact | adherence degree to the skin of the traversing tube 24 with an attached surface fastener.

  In addition, 30 shown by FIG. 5, FIG. 6 is a coupler joint with a non-return valve, and the circulating water amount adjustment valve, and it has the structure attached to a waist | belt separately from the cooling vest 2 with a belt. The pair of hoses 3 and the traversing tube 24 can be easily separated and connected by the coverr joint 30 with a check valve, and cooling water leaks from both the hose side and the traversing tube side by the function of the check valve when separating. To prevent that. In addition, the circulating water amount adjustment valve installed on the water supply side hose is a device that adjusts the circulating water amount according to the temperature experienced by each individual for each worker, and at the same time, the water supply to the cooling vest is ensured by the flow monitor. I can confirm. The arrangement of the traversing tube 24 in the cooling vest 2 is not limited to that shown in FIGS. 5 and 6, and various modifications are possible. In extreme cases, only the neck may be cooled. In order to cool the human body, it is effective to cool the neck with thick blood vessels near the body surface, the armpit, the base of the thigh, etc. A pants-type structure that cools the base of the thigh is also effective, and all of them may be combined to cover the whole body. In any case, the traversing tube 24 is preferably arranged so as to be parallel to the wrinkles formed by bending the body.

  The air-driven human body cooling system of the present invention can not only use the cooling device main body 1 and the cooling vest 2 on a one-on-one basis, but also a single cooling device main body as shown in FIGS. Cooling water can be supplied to one to a plurality of cooling vests 2. FIG. 7 shows a structure in which the branch hose 4 is branched from the middle of the water supply hose 3 to supply water to the plurality of cooling vests 2. This water supply structure is used in a work place where workers are distributed over a relatively wide area, and can be applied even when the amount of water discharged from the air-driven pump 12 is relatively small. However, cooling of workers far from the air-driven pump 12 is possible. There is a drawback that the water temperature of the vest becomes high. FIG. 8 shows a structure in which a water supply header 5 and a drainage header 6 are provided to supply water to a plurality of cooling vests 2. Although this water supply structure does not have the disadvantages as shown in FIG. 7, the capacity of the water tank 11 is 20 liters, the air-driven pump 12 is a large capacity pump capable of discharging 1.75 liters per minute, and each cooling vest 2 It is necessary to ensure sufficient water supply. Such a water supply structure for each cooling vest can be freely changed by extension joints and branch joints that connect hoses, so that the shortest water supply path length is achieved according to the worker's arrangement and work movement. adjust. Moreover, since the cooling device main body 1 has a weight of about 30 kg for five people, it has a structure in which the work place can be freely moved by a caster installed at the lower part of the device.

  When the above-described air-driven human body cooling system of the present invention is applied to cooling a worker who works in an environment at room temperature of 50 ° C., the internal temperature of the cooling vest 2 is maintained at 25 ° C. as shown in FIG. I was able to. In this case, the pressure of the compressed air source is 0.2 MPa, the flow rate is 65 liters per minute, and the feed water flow rate is 0.35 liters per minute.

  As described above, according to the present invention, it is possible to efficiently and safely cool the human body of an operator who performs work in a high temperature environment without requiring a power source. Can be protected from high heat.

DESCRIPTION OF SYMBOLS 1 Cooling device main body 2 Cooling vest 3 Hose 4 Branch hose 5 Water supply header 6 Drainage header 10 Housing 11 Water tank 12 Air-driven pump 13 Pressure reducing valve 14 Vortex tube 15 Compressed air inlet 16 Nozzle 17 Main body 18 Tube 19 Flow rate adjusting valve 20 Bubbling means 21 Aeration hole 22 Inlet port 23 Outlet port 24 Transverse tube 25 Neck portion 26 Body portion 27 Joint 28 Joint 29 Compressed air supply port 30 Check valve and circulating water amount adjusting valve

Claims (7)

A system that circulates cooling water between a cooling vest worn by an operator and a cooling device main body to cool the human body of the worker, the cooling device main body, a vortex tube that blows cold air into the water tank, An air-driven pump for supplying cooling water in the obtained water tank to the cooling vest, and the water tank is provided with a bubbling means for blowing cold air obtained by a vortex tube. Human body cooling system. The air-driven human body cooling system according to claim 1 , wherein the bubbling means has a spiral shape .   3. The air-driven human body cooling system according to claim 2, wherein the bubbling means is disposed between the cooling water inlet at the upper part of the water tank and the outlet at the lower part of the water tank.   The air-driven human body cooling system according to claim 1, wherein the cooling vest includes a traversing tube through which cooling water circulates.   The air-driven human body cooling system according to claim 1, wherein the cooling vest is provided with a check valve for preventing a backflow of cooling water.   The air-driven human body cooling system according to claim 1, wherein the vortex tube is disposed outside a housing of a cooling device main body.   The air-driven human body cooling system according to claim 1, wherein cooling water is supplied to a plurality of cooling vests from one cooling device main body.