JP2021132689A - Human body cooling device - Google Patents

Abstract

To provide a human body cooling device efficiently cooling a human body.SOLUTION: A human body cooling device 10 is configured so that a user wearing the human body cooling device 10 can act, and includes a cooling part 100 cooling a to-be-cooled portion of the limb, and a pressurizing part 200 pressurizing a to-be-pressurized portion nearer to the trunk than to the to-be-cooled portion of the limb. When the to-be-pressurized portion is pressurized by the pressurizing part 200 and the blood amount of the to-be-cooled portion is increased, the ratio of heat exchange between the to-be-cooled portion and the cooling part 100 becomes higher and the to-be-cooled portion is efficiently cooled.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a human body cooling device that cools the human body.

A human body cooling device that cools the human body is known. For example, Patent Document 1 describes a technique for cooling hands with the contents of a frozen PET bottle. Patent Document 2 describes a technique of reducing the pressure in a closed container to −20 mmHg to −80 mmHg to cool the hands and feet arranged in the closed container.

Japanese Patent No. 5155422 U.S. Pat. No. 6,656,208

It is expected that the human body will be cooled efficiently with respect to the human body cooling device.

The human body cooling device of the present disclosure includes a cooling unit that cools a cooled portion of a body limb and a pressurizing portion that pressurizes a pressurized portion of the limb that is closer to the trunk than the cooled portion.

According to the human body cooling device of the present disclosure, the human body can be cooled efficiently.

Block diagram of the human body cooling device. The figure which shows the outside of the upper limb which attached the human body cooling device. The figure which shows the inside of the upper limb which attached the human body cooling device. The figure which shows the upper body which attached the human body cooling device. The figure which shows the hand holding the grasped object (1). The figure which shows the hand holding the grasped object (2). The figure which shows the front of the lower limbs which attached the human body cooling device. The figure which shows the side surface of the lower limbs which attached the human body cooling device. The figure which shows the developed mounting part. The figure which shows the measurement result of a test (1). The figure which shows the measurement result of a test (2). The figure which shows the measurement result of a test (3). The figure which shows the measurement result of a test (4).

(Example of the form of the human body cooling device)
The human body cooling device includes a cooling unit that cools a cooled portion of the body limb and a pressurizing portion that pressurizes a pressurized portion of the body limb that is closer to the trunk than the cooled portion.

According to the human body cooling device, the pressurized portion is pressurized by the pressurized portion. When the pressurized part is pressurized, the blood flow rate of the vein connecting the cooled part to the heart decreases, and the blood volume in the cooled part tends to increase. When the amount of blood in the cooled portion is large, heat exchange between the blood in the cooled portion and the cooled portion is likely to be promoted. This contributes to efficiently cooling the part to be cooled.

In an example of the human body cooling device, the cooling unit cools the hand included in the cooled portion, and the pressurizing portion pressurizes the arm included in the pressurized portion.

According to the human body cooling device, the hands are efficiently cooled.

In an example of the human body cooling device, the pressurized portion pressurizes the wrist included in the pressurized portion.

According to the above-mentioned human body cooling device, when the wrist is pressurized by the pressurizing portion, the blood flow rate of the vein of the cooled portion tends to decrease.

In an example of the human body cooling device, the cooling unit cools the foot included in the cooled portion, and the pressurized portion pressurizes the leg included in the pressurized portion.

According to the human body cooling device, the feet are efficiently cooled.

In an example of the human body cooling device, the pressurized portion pressurizes the ankle included in the pressurized portion.

According to the above-mentioned human body cooling device, when the ankle is pressurized by the pressurizing portion, the blood flow rate of the vein of the cooled portion tends to decrease.

In an example of the human body cooling device, a control unit that controls the pressurizing unit is further provided.

According to the human body cooling device, the pressurized portion is appropriately pressurized by the pressurized portion.

In an example of the human body cooling device, the control unit controls the pressurizing unit according to the state of the human body including the limbs.

According to the above-mentioned human body cooling device, the degree of pressurization of the pressurized part related to the blood volume of the cooled part is controlled according to the state of the human body, so that the cooled part is cooled according to the state of the human body. It becomes easy to be done.

In an example of the human body cooling device, the control unit controls the pressurizing unit and the cooling unit so that the cooling unit cools the cooled portion while the pressurizing unit pressurizes the pressurized portion. do.

According to the human body cooling device, the part to be cooled is efficiently cooled.

In an example of the human body cooling device, the pressure of the pressurizing unit is 10 mmHg or more.

When the pressure of the pressurizing portion is 10 mmHg or more, the vein connecting the cooled portion to the heart is likely to be strongly pressurized.

In an example of the human body cooling device, the pressure of the pressurizing unit is 50 mmHg or less.

When the pressure of the pressurizing portion is 50 mmHg or less, the artery connecting the heart to the site to be cooled is not strongly pressurized.

(Embodiment 1)
The human body cooling device 10 shown in FIG. 1 cools the human body. The form of the human body cooling device 10 will be illustrated. In the first example, the human body cooling device 10 is configured so that the user wearing the human body cooling device 10 can act. In the second example, the human body cooling device 10 includes a portion to be attached to the human body and a portion to be installed at an arbitrary place. The user who wears the human body cooling device 10 stays around the installation unit and uses the human body cooling device 10. Examples of user activities include walking, sports, and various activities in daily life.

The human body cooling device 10 includes a cooling unit 100 and a pressurizing unit 200. The cooling unit 100 is configured to cool the cooled portion of the body limb. The pressurizing unit 200 is configured to pressurize the pressurized portion of the body limb. The pressurized part is a part different from the cooled part in the limb. In one example, the area under pressure is closer to the trunk than the area under cooling in the limbs. The limbs include the left and right upper limbs and the left and right lower limbs. Upper limbs include arms and hands. Arms include upper arm and forearm. The forearm includes the wrist. Lower limbs include legs and feet. The legs include the thighs and lower legs. The lower leg includes the ankle.

The cooling unit 100 includes a cooling function unit 110. The cooling function unit 110 cools the cooled portion by exchanging heat with the cooled portion. In one example, the cooling function unit 110 is configured to cool a portion to be cooled including at least one of the right hand, the left hand, the right foot, and the left foot.

An example will be given of the configuration of the cooling function unit 110 with respect to the portion to be cooled. In the first example, the cooling unit 100 includes one cooling function unit 110. One cooling function unit 110 is configured to correspond to one or more of the right hand, the left hand, the right foot, and the left foot. In the second example, the cooling unit 100 includes two cooling function units 110. The two cooling function units 110 are configured to correspond to a pair of right hand and left hand, a pair of right foot and left foot, a pair of right hand and right foot, a pair of left hand and left foot, a pair of right hand and left foot, or a pair of left hand and right foot. Will be done. In the third example, the cooling unit 100 includes three cooling function units 110. The three cooling function units 110 are configured to correspond to three of the right hand, the left hand, the right foot, and the left foot. In the fourth example, the cooling unit 100 includes four cooling function units 110. The four cooling function units 110 are configured to correspond to the right hand, the left hand, the right foot, and the left foot, respectively.

The cooling function unit 110 includes, for example, at least one of a cooling material and a temperature control unit. Cooling materials include, for example, liquids or gases. The cooling material is, for example, excellent in heat transfer and fluidity. The temperature control unit operates by receiving the supply of electrical energy. The temperature control unit cools the part to be cooled by using, for example, a thermoelectric conversion element.

The cooling unit 100 further includes a mounting unit 120. The mounting portion 120 is mounted on the cooled portion. The mounting portion 120 includes the main body 121. The main body 121 is configured so that it can be attached to a portion to be cooled. The main body 121 is made of a flexible material suitable for mounting on a part to be cooled, for example. The main body 121 has a shape according to the part to be cooled. The main body 121 may take the form of, for example, handwear or footwear. Examples of handwear include gloves and the like. Examples of footwear include shoes and socks. The cooling function unit 110 is provided on the main body 121. The relationship between the cooling function unit 110 and the main body 121 will be illustrated. In the first example, the cooling function unit 110 is configured to be detachable from the main body 121. In the second example, the cooling function unit 110 is fixed to the main body 121.

The mounting portion 120 further includes a fixing portion 122. The fixing portion 122 is provided on the main body 121. The fixing portion 122 may take a fixed state in which the main body 121 is fixed to the cooled portion and a non-fixed state in which the main body 121 is not fixed to the cooled portion. The state of the fixed portion 122 is selected by, for example, the user. The fixing portion 122 includes, for example, a hook-and-loop fastener.

When the mounting portion 120 is mounted on the portion to be cooled, the cooling function portion 110 is adjacent to the portion to be cooled so that the portion to be cooled can be cooled. In one example, the mounting unit 120 further includes a protective unit 123. The protection unit 123 protects the cooled portion from the cooling function portion 110 so that the cooling function portion 110 does not come into direct contact with the cooled portion. When the mounting portion 120 is mounted on the cooled portion, the protective portion 123 is arranged between the cooling function portion 110 and the cooled portion. Examples of the material constituting the protective portion 123 include natural fibers and chemical fibers. Examples of natural fibers include cotton and hair. Examples of chemical fibers include polyester and nylon. In a preferred example, the material constituting the protective portion 123 has elasticity. When the protective portion 123 has high elasticity, the adhesion between the protective portion 123 and the cooled portion becomes high when the mounting portion 120 is attached to the cooled portion.

The pressurizing unit 200 includes a pressurizing function unit 210. The pressurizing function unit 210 pressurizes the pressurized portion and adjusts the blood flow rate of the pressurized portion. In one example, the pressurizing function unit 210 is configured to pressurize a pressurized portion including at least one of the right arm, the left arm, the right leg, and the left leg.

The configuration of the pressurizing function unit 210 with respect to the pressurized portion will be illustrated. In the first example, the pressurizing section 200 includes one pressurizing function section 210. One pressurizing function unit 210 is configured to correspond to one or more of the right arm, the left arm, the right leg, and the left leg. In the second example, the pressurizing section 200 includes two pressurizing function sections 210. The two pressurizing function units 210 are a pair of right arm and left arm, a pair of right leg and left leg, a pair of right arm and right leg, a pair of left arm and left leg, a pair of right arm and left leg, or a pair of left arm and right leg. It is configured to correspond to a pair. In the third example, the pressurizing section 200 includes three pressurizing function sections 210. The three pressurizing function units 210 are configured to correspond to three of the right arm, the left arm, the right leg, and the left leg. In the fourth example, the pressurizing section 200 includes four pressurizing function sections 210. The four pressurizing function units 210 are configured to correspond to the right arm, the left arm, the right leg, and the left leg, respectively.

The pressurizing function unit 210 includes, for example, at least one of a tightening means and a pressing means. Examples of the tightening means include an airbag unit and a wire unit. The airbag unit includes an airbag and an airbag drive unit. The airbag drive unit operates by receiving the supply of electric energy. The airbag drive unit controls the supply and discharge of air related to the airbag. The operating state of the airbag is controlled by the airbag drive unit. The airbag can be in a pressurized state in which the pressurized portion is pressurized and a non-pressurized state in which the pressurized portion is not pressurized. The wire unit includes a wire and a wire drive unit. The wire drive unit is driven by receiving the supply of electric energy. The wire drive unit controls the tension of the wire. The wire may be in a pressurized state in which the pressurized portion is pressurized and a non-pressurized state in which the pressurized portion is not pressurized.

An electric actuator can be mentioned as an example of the pressing means. The electric actuator includes a moving part and a driving part. The drive unit is driven by receiving the supply of electric energy. The drive unit controls the linear motion or rotational motion of the moving unit. The operating state of the moving unit is controlled by the driving unit. The moving part can take a pressurized state in which the pressurized portion is pressurized and a non-pressurized state in which the pressurized portion is not pressurized.

The pressurizing unit 200 further includes a mounting unit 220. The mounting portion 220 is mounted on the pressurized portion. The mounting portion 220 includes the main body 221. The main body 221 is configured so that it can be attached to a pressurized portion. The main body 221 is made of a flexible material suitable for mounting on a pressurized portion, for example. The body 221 can take the form of a cuff, for example. The pressurizing function unit 210 is provided on the main body 221. The relationship between the pressurizing function unit 210 and the main body 221 will be illustrated. In the first example, the pressurizing function unit 210 is configured to be detachable from the main body 221. In the second example, the pressurizing function unit 210 is fixed to the main body 221.

The mounting portion 220 further includes a fixing portion 222. The fixing portion 222 is provided on the main body 221. The fixing portion 222 may take a fixed state in which the main body 221 is fixed to the pressurized portion and a non-fixed state in which the main body 221 is not fixed to the pressurized portion. The state of the fixed portion 222 is selected by, for example, the user. The fixing portion 222 includes, for example, a hook-and-loop fastener.

The mounting portion 220 further includes an adjusting portion 223. When the mounting portion 220 is mounted on the pressurized portion, the pressurizing function portion 210 is adjacent to the pressurized portion so that the pressurized portion can be pressurized. The pressurized portion is pressurized by the operation of the pressurizing function unit 210. The adjusting unit 223 adjusts the state of the pressurizing function unit 210 so that the pressure applied to the pressurized portion does not become excessively strong while improving the adhesion between the pressurized portion and the pressurizing function portion 210. The adjusting unit 223 includes, for example, a plate-shaped plastic. The plate-shaped plastic can take a curved shape, for example, to match the shape of the pressurized portion. This shape makes it easier for the user to attach the mounting portion 220 to the pressurized portion.

In one example, the human body cooling device 10 further comprises a connection 300. The connection unit 300 mechanically or electrically connects the elements constituting the human body cooling device 10. The connection unit 300 mechanically connects the elements constituting the human body cooling device 10 so as to improve the convenience of the human body cooling device 10, for example.

In one example, the human body cooling device 10 further includes a control unit 400. The control unit 400 is, for example, a control unit including electronic components. In one example, the control unit 400 includes a housing 410, a controller 420, and a user interface 430. The controller 420 is provided in the housing 410. The controller 420 includes, for example, a processor. The controller 420 is electrically connected to the controlled object. The controller 420 transmits a signal to the controlled object. The controller 420 controls the control target provided in the human body cooling device 10. The control target includes, for example, at least one of a cooling unit 100 and a pressurizing unit 200.

The user interface 430 is provided outside the housing 410 for use by the user. The user interface 430 includes at least one of an input device and an output device. Input devices include, for example, switches. Output devices include, for example, displays. The user interface 430 is electrically connected to the controller 420. The input device transmits an input signal to the controller 420. The controller 420 transmits an output signal to the output device.

In one example, the human body cooling device 10 further includes a detection unit 500. The detection unit 500 includes, for example, one or a plurality of sensors that detect the state of the user. Examples of the sensor include a temperature sensor, an acceleration sensor, a gyro sensor, a motion sensor and the like. The detection unit 500 is electrically connected to the control unit 400. The detection unit 500 transmits the measurement signal to the control unit 400.

In one example, the human body cooling device 10 further includes a power supply unit 600. The power supply unit 600 is electrically connected to the power demand unit of the human body cooling device 10. The power supply unit 600 supplies power to the power demand unit, for example, the power of the primary battery, the power of the secondary battery, or the power generated by the power generation device. Examples of the electric power demand unit include a cooling function unit 110, a pressurizing function unit 210, and a control unit 400.

The control unit 400 operates by receiving power supplied from the power supply unit 600. The control unit 400 controls, for example, the pressurizing unit 200. In the control of the pressurizing unit 200, the control unit 400 controls the operating state of the pressurizing function unit 210 according to the pressurizing conditions. The control unit 400 refers to, for example, at least one of the measurement signal of the detection unit 500 and the input signal of the user interface 430, and determines the success or failure of the pressurization condition. The control unit 400 controls the pressurizing function unit 210 so that the pressurizing function unit 210 operates when the pressurizing condition is satisfied. The control unit 400 controls the pressurizing function unit 210 so that the pressurizing function unit 210 does not operate when the pressurizing condition is not satisfied.

The operation and effect of the human body cooling device 10 will be described.
When the pressurizing function unit 210 operates, the pressurized portion is pressurized by the pressurizing unit 200. With the pressurization of the pressurized part, the vein of the pressurized part is compressed, and the blood flow rate of the vein of the pressurized part decreases. Along with this, the blood flow rate of the vein connecting the cooled part to the pressurized part also decreases.

In a preferred example, when the pressurized portion is pressurized by the pressurized portion 200, the artery at the pressurized portion is not substantially compressed, and the blood flow rate of the artery at the pressurized portion is unlikely to decrease. Along with this, the blood flow rate of the artery connecting the pressurized part to the cooled part is also unlikely to decrease. The state in which the artery is substantially not compressed also includes a state in which the effect on the blood flow of the artery is small even when the artery is compressed.

Due to the decrease in venous blood flow due to the pressurization of the pressurized site, the blood volume of the cooled site becomes larger than that before the pressurization of the pressurized site. The degree of heat exchange between the cooled portion and the cooling portion 100 is influenced by, for example, the blood volume of the cooled portion. As the blood volume of the cooled portion increases, the degree of heat exchange between the cooled portion and the cooling portion 100 tends to increase. When the pressurized portion is pressurized by the pressurized portion 200 and the blood volume of the cooled portion increases, the degree of heat exchange between the cooled portion and the cooling portion 100 becomes stronger, and the cooled portion becomes efficient. Is cooled to.

Blood pumped from the animal's heart flows through arteries to peripheral capillaries, then through veins and back into the heart. Mammals have blood vessels called Arteriovenous Anastomoses (abbreviated as AVA) that connect arteries and veins before they branch into capillaries. Arteriovenous anastomosis is present in hairless areas such as hands, feet, lips, ears, and nose. When thermoregulatory reflex stimuli dilate arteriovenous anastomosis, blood flow increases significantly. The blood flow at the site where the arteriovenous anastomosis is present is significantly higher than the blood flow at other sites. In situations where heat dissipation is required due to an increase in body temperature due to activities in a hot environment, arteriovenous anastomosis of the hands and feet is dilated, blood flow in the arteries of the hands and feet is increased, and heat is dissipated. NS. When the hands and feet are cooled, heat dissipation is promoted.

The prior art related to the human body cooling device will be examined. For example, according to the human body cooling device of Patent Document 1, blood vessels contract as the hand cools. When blood vessels constrict, the blood flow in the arteries that connect the heart to the hand may decrease, and the degree of heat exchange between the hand and the cooling part may weaken. Since the human body cooling device of Patent Document 2 is equipped with a pump for depressurizing, the size of the device is increased. This limits the activity of the user, for example, using the human body cooling device.

(Embodiment 2)
The human body cooling device 10 of the second embodiment is configured on the premise of the human body cooling device 10 of the first embodiment. The configuration of the human body cooling device 10 of the second embodiment is different from the configuration of the human body cooling device 10 which is premised on the points described below.

The control unit 400 controls the pressure applied to the pressurized portion by the pressurizing unit 200 (hereinafter referred to as “pressure of the pressurizing unit 200”). The control unit 400 controls the pressure of the pressurizing unit 200 according to the control information. The control information is stored in a storage unit included in the human body cooling device 10 or an external device communicating with the human body cooling device 10. The method of controlling the pressure of the pressurizing unit 200 will be illustrated.

In the first example, the control information includes information that defines a predetermined pressure range regarding the pressure of the pressurizing unit 200, and information that defines the relationship between the pressure of the pressurizing unit 200 and the voltage or current of the pressurizing function unit 210. .. The predetermined pressure range is predetermined as a pressure range that makes it difficult to reduce the blood flow of the artery connecting the heart to the cooled site and contributes to reducing the blood flow of the vein connecting the cooled site to the heart. The control unit 400 refers to the control information and controls the voltage or current supplied to the pressurizing function unit 210 so that the pressure of the pressurizing unit 200 is included in the predetermined pressure range.

In the second example, the control information is information that defines the relationship between the pressure of the pressurizing unit 200 and the measurement signal of the detection unit 500, and the relationship between the pressure of the pressurizing unit 200 and the voltage or current of the pressurizing function unit 210. Contains information that prescribes. The control unit 400 refers to the control information, sets the pressure of the pressurizing unit 200 corresponding to the measurement signal of the detection unit 500, and controls the voltage or current supplied to the pressurizing function unit 210 according to the pressure.

A preferable pressure range with respect to the pressure of the pressurizing unit 200 will be illustrated. In the first example, the pressure range is 10 mmHg or more. In the second example, the pressure range is 20 mmHg or more. In the third example, the pressure range is 50 mmHg or less. In the fourth example, the pressure range is 40 mmHg or less. In the fifth example, the pressure range is 10 mmHg to 50 mmHg. In the sixth example, the pressure range is 10 mmHg to 40 mmHg. In the seventh example, the pressure range is 20 mmHg to 50 mmHg. In the eighth example, the pressure range is 20 mmHg-40 mmHg. When the pressure range is 10 mmHg or more, the blood flow rate in the vein of the pressurized site tends to decrease. When the pressure range is 20 mmHg or more, the blood flow rate in the vein of the pressurized site is more likely to decrease. When the pressure range is 50 mmHg or less, the blood flow rate of the artery at the pressurized site is unlikely to decrease. When the pressure range is 40 mmHg or less, the blood flow rate of the artery at the pressurized site is less likely to decrease.

A predetermined pressure range included in the control information of the first example regarding the pressure control method of the pressurizing unit 200, and the pressure of the pressurizing unit 200 included in the control information of the second example regarding the pressure control method of the pressurizing unit 200. Is set, for example, based on the preferred pressure range described above.

(Embodiment 3)
The human body cooling device 10 of the third embodiment is configured on the premise of the human body cooling device 10 of the first or second embodiment. The configuration of the human body cooling device 10 according to the third embodiment is different from the configuration of the human body cooling device 10 which is premised on the points described below.

As shown in FIGS. 2 and 3, the human body cooling device 10 includes at least a cooling unit 100 corresponding to the upper limbs as the cooling unit 100. The cooling unit 100 corresponding to the upper limb includes at least one of the cooling unit 100 corresponding to the right hand and the cooling unit 100 corresponding to the left hand. The form of the mounting portion 120 is, for example, a glove. The arrangement of the cooling function unit 110 in the mounting unit 120 will be illustrated. In the first example, the cooling function unit 110 is provided in a portion of the mounting unit 120 corresponding to the palm. In the second example, the cooling function unit 110 is provided on the portion of the mounting unit 120 corresponding to the back of the hand. In the third example, the cooling function unit 110 is provided at a portion of the mounting unit 120 corresponding to the fingers of the hand. In the fourth example, the cooling function unit 110 includes at least two configurations of the first to third examples.

(Embodiment 4)
The human body cooling device 10 of the fourth embodiment is configured on the premise of any of the human body cooling devices 10 of the first to third embodiments. The configuration of the human body cooling device 10 according to the fourth embodiment is different from the configuration of the human body cooling device 10 which is premised on the points described below.

As shown in FIGS. 2 and 3, the human body cooling device 10 includes at least a pressurizing unit 200 corresponding to the upper limbs as the pressurizing unit 200. The pressurizing section 200 corresponding to the upper limb includes at least one of the pressurizing section 200 corresponding to the right wrist and the pressurizing section 200 corresponding to the left wrist. The form of the mounting portion 220 is, for example, a cuff.

The arrangement of the pressurizing function unit 210 in the mounting unit 220 will be illustrated. In the first example, the pressurizing function portion 210 is provided at a portion of the mounting portion 220 corresponding to the inside of the wrist. In the second example, the pressurizing function portion 210 is provided on the portion of the mounting portion 220 corresponding to the outside of the wrist. In the third example, the pressurizing function unit 210 includes the configurations of the first example and the second example.

The arrangement of the control unit 400 in the mounting unit 220 will be illustrated. In the first example, the control unit 400 is provided on the portion of the mounting unit 220 corresponding to the inside of the wrist. In the second example, the control unit 400 is provided on the portion of the mounting unit 220 corresponding to the outside of the wrist. In the third example, the control unit 400 includes the configurations of the first example and the second example.

In one example, the pressurizing portion 200 corresponding to the upper limb is pressurized so that the distance between the predetermined portion of the pressurizing portion 200 and the predetermined portion of the wrist (hereinafter referred to as "first distance") is included in the predetermined distance range. It is attached to the part. The predetermined portion of the pressurizing portion 200 is, for example, a hand-side end portion of the mounting portion 220 or a hand-side end portion of the pressurizing function portion 210. A predetermined portion of the wrist is, for example, a radial styloid process or an ulnar styloid process. The predetermined distance range is determined so that the effect of reducing the venous blood flow is enhanced when the pressurizing unit 200 pressurizes the pressurized portion. The predetermined distance range is included in the range of, for example, 1 cm to 2 cm.

(Embodiment 5)
The human body cooling device 10 of the fifth embodiment is configured on the premise of the human body cooling device 10 of the fourth embodiment which is premised on the third embodiment. The configuration of the human body cooling device 10 according to the fifth embodiment is different from the configuration of the human body cooling device 10 which is premised on the points described below.

As shown in FIG. 3, the connection unit 300 includes a first connection unit 310. The first connection portion 310 connects the mounting portion 120 of the cooling portion 100 corresponding to the upper limb and the mounting portion 220 of the pressurizing portion 200. The form of the first connection portion 310 is, for example, a band. The configuration of the first connection unit 310 with respect to the cooling unit 100 and the pressurizing unit 200 will be illustrated. In the first example, the first connection portion 310 is configured to be detachable from the mounting portion 120 of the cooling portion 100. In the second example, the first connection portion 310 is integrally formed with the mounting portion 120 of the cooling portion 100. In the third example, the first connection portion 310 is configured to be detachable from the mounting portion 220 of the pressurizing portion 200. In the fourth example, the first connection portion 310 is integrally formed with the mounting portion 220 of the pressurizing portion 200. In the fifth example, the first connection portion 310 includes one configuration of the first example and the second example and one configuration of the third example and the fourth example.

(Embodiment 6)
The human body cooling device 10 of the sixth embodiment is configured on the premise of the human body cooling device 10 of the fourth embodiment or the fifth embodiment which is premised on the third embodiment. The configuration of the human body cooling device 10 according to the sixth embodiment is different from the configuration of the human body cooling device 10 which is premised on the points described below.

As shown in FIG. 4, the power supply unit 600 is configured separately from the cooling unit 100 and the pressurizing unit 200. In one example, the power supply unit 600 is configured to be attached to the human body. The power supply unit 600 includes a main body 610, a case 620, and a mounting unit 630. The configuration of the main body 610 will be illustrated. In the first example, the main body 610 includes a primary battery or a secondary battery. In the second example, the main body 610 includes a power generation device and a power storage unit. Power generation devices include, for example, energy harvesting devices. The power storage unit includes, for example, a rechargeable battery or a capacitor.

The case 620 supports the main body 610. In one example, the case 620 includes a space for accommodating the body 610. The main body 610 housed in the case 620 is protected by the case 620. The mounting portion 630 is provided on the case 620. The attachment portion 630 is configured so that it can be attached to, for example, a body limb. The mounting portion 630 is made of a flexible material suitable for mounting on a human body, for example.

The connection unit 300 includes a first electrical connection unit 330. The form of the first electrical connection unit 330 is, for example, a cable. The first electrical connection unit 330 is connected to each of the power supply unit 600 and the pressurizing unit 200. The first electrical connection unit 330 electrically connects the power supply unit 600 and the pressurizing unit 200. The electric power of the power supply unit 600 is supplied to the pressurizing unit 200 via the first electric connection unit 330.

In the human body cooling device 10 in which the cooling function unit 110 includes a temperature control unit, the connection unit 300 further includes a second electrical connection unit 340. The form of the second electrical connection portion 340 is, for example, a cable. The configuration of the second electrical connection portion 340 will be illustrated. In the first example, the second electrical connection unit 340 is connected to each of the cooling unit 100 and the pressurizing unit 200. The second electrical connection unit 340 electrically connects the cooling unit 100 and the pressurizing unit 200. The electric power of the power supply unit 600 is supplied to the cooling unit 100 via the first electric connection unit 330, the pressurizing unit 200, and the second electric connection unit 340. In the second example, the second electrical connection unit 340 is connected to each of the cooling unit 100 and the power supply unit 600. The second electrical connection unit 340 electrically connects the cooling unit 100 and the power supply unit 600. The electric power of the power supply unit 600 is supplied to the cooling unit 100 via the second electric connection unit 340.

(Embodiment 7)
The human body cooling device 10 of the seventh embodiment is configured on the premise of any one of the human body cooling devices 10 of the first to sixth embodiments. The configuration of the human body cooling device 10 according to the seventh embodiment is different from the configuration of the human body cooling device 10 which is premised on the points described below.

As shown in FIGS. 5 and 6, the cooling function unit 110 includes at least an object to be grasped. The configuration of the cooling unit 100 will be illustrated. In the first example, the cooling unit 100 includes the cooling function unit 110 and the mounting unit 120 of the third and fourth embodiments, and the object to be grasped of the seventh embodiment. In the second example, the cooling unit 100 includes the object to be grasped according to the seventh embodiment in place of the cooling function unit 110 and the mounting unit 120 of the third and fourth embodiments.

The cooling function unit 110 includes at least one object to be grasped for the right hand and an object to be grasped for the left hand. The object to be grasped is configured so that the user can firmly grasp it by hand. When the user holds the object to be grasped by hand, the object to be grasped comes into contact with a wide range of the palm. Examples of the shape of the object to be grasped include a prism, a cone, a sphere, and the like. The object to be grasped in the first example shown in FIG. 5 is a prism having a bow-shaped bottom surface. The object to be grasped in the second example shown in FIG. 6 is a prism having a circular bottom surface.

(Embodiment 8)
The human body cooling device 10 of the eighth embodiment is configured on the premise of any one of the human body cooling devices 10 of the first to seventh embodiments. The configuration of the human body cooling device 10 according to the eighth embodiment is different from the configuration of the human body cooling device 10 which is premised on the points described below.

As shown in FIGS. 7 to 9, the human body cooling device 10 includes at least a cooling unit 100 corresponding to the lower limbs as the cooling unit 100. The cooling unit 100 corresponding to the lower limbs includes at least one of the cooling unit 100 corresponding to the right foot and the cooling unit 100 corresponding to the left foot. The form of the mounting portion 120 is, for example, a sock that can be deployed. The arrangement of the cooling function unit 110 in the mounting unit 120 will be illustrated. In the first example, the cooling function unit 110 is provided at a portion of the mounting unit 120 corresponding to the sole of the foot. In the second example, the cooling function unit 110 is provided at a portion of the mounting unit 120 corresponding to the instep. In the third example, the cooling function unit 110 is provided at a portion of the mounting unit 120 corresponding to the toes. In the fourth example, the cooling function unit 110 includes at least two configurations of the first to third examples.

(Embodiment 9)
The human body cooling device 10 of the ninth embodiment is configured on the premise of any one of the human body cooling devices 10 of the first to eighth embodiments. The configuration of the human body cooling device 10 according to the ninth embodiment is different from the configuration of the human body cooling device 10 which is premised on the points described below.

As shown in FIGS. 7 to 9, the human body cooling device 10 includes at least a pressurizing unit 200 corresponding to the lower limbs as the pressurizing unit 200. The pressurizing section 200 corresponding to the lower limbs includes at least one of the pressurizing section 200 corresponding to the right ankle and the pressurizing section 200 corresponding to the left ankle. The form of the mounting portion 220 is, for example, a cuff.

The arrangement of the pressurizing function unit 210 in the mounting unit 220 will be illustrated. In the first example, the pressurizing function portion 210 is provided at a portion of the mounting portion 220 corresponding to the medial portion of the ankle. In the second example, the pressurizing function portion 210 is provided at a portion of the mounting portion 220 corresponding to the outer portion of the ankle. In the third example, the pressurizing function portion 210 is provided at a portion of the mounting portion 220 corresponding to the front side of the ankle. In the fourth example, the pressurizing function portion 210 is provided at a portion of the mounting portion 220 corresponding to the rear side of the ankle. In the fifth example, the pressurizing function unit 210 includes at least two configurations of the first to fourth examples.

The arrangement of the control unit 400 in the mounting unit 220 will be illustrated. In the first example, the control unit 400 is provided at a portion of the mounting unit 220 corresponding to the medial portion of the ankle. In the second example, the control unit 400 is provided at a portion of the mounting unit 220 corresponding to the outer portion of the ankle. In the third example, the control unit 400 is provided at a portion of the mounting unit 220 corresponding to the front side of the ankle. In the fourth example, the control unit 400 is provided at a portion of the mounting unit 220 corresponding to the rear side of the ankle. In the fifth example, the control unit 400 includes at least two configurations of the first to fourth examples.

In one example, the pressurizing portion 200 corresponding to the lower limbs is pressurized so that the distance between the predetermined portion of the pressurizing portion 200 and the predetermined portion of the ankle (hereinafter referred to as “second distance”) is included in the predetermined distance range. It is attached to the part. The predetermined portion of the pressurizing portion 200 is, for example, a foot-side end portion of the mounting portion 220 or a foot-side end portion of the pressurizing function portion 210. A predetermined portion of the ankle is, for example, the lateral or medial malleolus. The predetermined distance range is determined so that the effect of reducing the venous blood flow is enhanced when the pressurizing unit 200 pressurizes the pressurized portion. The predetermined distance range is included in the range of, for example, 1 cm to 2 cm.

(Embodiment 10)
The human body cooling device 10 of the tenth embodiment is configured on the premise of the human body cooling device 10 of the ninth embodiment, which is premised on the eighth embodiment. The configuration of the human body cooling device 10 according to the eighth embodiment is different from the configuration of the human body cooling device 10 which is premised on the points described below.

As shown in FIGS. 8 and 9, the connection 300 includes a second connection 320. The second connecting portion 320 connects the mounting portion 120 of the cooling portion 100 corresponding to the lower limbs and the mounting portion 220 of the pressurizing unit 200. The form of the second connection portion 320 is, for example, a band. The configuration of the second connection unit 320 with respect to the cooling unit 100 and the pressurizing unit 200 will be illustrated. In the first example, the second connecting portion 320 is configured to be detachable from the mounting portion 120 of the cooling portion 100. In the second example, the second connection portion 320 is integrally formed with the mounting portion 120 of the cooling portion 100. In the third example, the second connection portion 320 is configured to be detachable from the mounting portion 220 of the pressurizing portion 200. In the fourth example, the second connecting portion 320 is integrally formed with the mounting portion 220 of the pressurizing portion 200. In the fifth example, the second connection portion 320 includes one configuration of the first example and the second example and one configuration of the third example and the fourth example. In the example shown in FIGS. 8 and 9, the mounting portion 120 of the cooling portion 100, the mounting portion 220 of the pressurizing portion 200, and the second connecting portion 320 are integrally configured.

(Embodiment 11)
The human body cooling device 10 of the eleventh embodiment is configured on the premise of any one of the human body cooling devices 10 of the first to tenth embodiments. The configuration of the human body cooling device 10 according to the eleventh embodiment is different from the configuration of the human body cooling device 10 which is premised on the points described below.

The cooling function unit 110 contains a cooling agent. The size of the ice pack is determined according to the size of the part to be cooled. An ice pack is a drug used to keep an object at a low temperature. The ice pack is, for example, a cold storage agent. Cold storage agents are classified into, for example, latent heat type cold storage agents and sensible heat type cold storage agents. The latent heat type cold storage agent utilizes the latent heat that accompanies the phase change of the substance. The latent heat type cold storage agent contains a cold storage substance. Examples of the organic material of the cold storage substance include paraffin waxes and fatty acids. Examples of the inorganic material of the cold storage substance include hydrated salts and the like. The sensible heat type cold storage agent utilizes sensible heat that does not involve a phase change of the substance. Examples of the sensible heat type cold storage agent include metals and water. Generally, commercially available heat storage agents are packed in bags. The heat storage agent includes water, a highly water-absorbent resin, a preservative, and a shape stabilizer. The highly water-absorbent resin is, for example, polyvinyl alcohol, sodium polyacrylate, polyacrylamide, guar gum, sodium alginate, starch, sodium salt of carboxymethyl cellulose and the like.

The heat storage agent solidifies by cooling. The heat storage agent preferably has flexibility even in a low temperature state. When the heat storage agent has high flexibility, effects such as improvement of usability, improvement of fit, and increase of contact area can be obtained. An example of a heat storage agent having high flexibility in a low temperature state. In the first example, the heat storage agent is a gel composition. The gel composition contains a copolymer and a polyhydric alcohol. The copolymer is composed of, for example, an alkyl vinyl ether having 3 to 24 carbon atoms, maleic anhydride, or a copolymer composed of maleic acid, or an alkyl vinyl ether having 3 to 24 carbon atoms, itaconic anhydride, or itaconic acid. It is a copolymer. In the second example, the heat storage agent is a composition containing a nonionic water-soluble cellulose ether, a polymer containing an unsaturated polycarboxylic acid component as a polymerization component, polyhydric alcohols, and water.

When a cold storage agent is used, the cold storage agent is pre-coagulated and kept in a solid state. When the cold storage agent is coagulated, the cold storage agent is left in an environment lower than the freezing point of the cold storage agent for a predetermined time or longer. The temperature of the low temperature environment is, for example, a temperature lower than the freezing point of the cold storage agent by 10 ° C. or more. The predetermined time is, for example, 10 hours. The temperature inside a household refrigerator is generally around -18 ° C. When the cold storage agent is solidified using a household refrigerator, the freezing point of the cold storage agent is preferably −5 ° C. or higher. The skin temperature of the limbs is included in the range of about 30 ° C. to 35 ° C. even considering that it depends on the environment and the active state. The environment is, for example, the outside air temperature and the wind speed. The activity state is, for example, sports, bathing, etc. From the skin temperature of the limbs, the melting point of the cold storage agent is preferably 25 ° C. or lower.

(Embodiment 12)
The human body cooling device 10 of the twelfth embodiment is configured on the premise of any one of the human body cooling devices 10 of the first to eleventh embodiments. The configuration of the human body cooling device 10 according to the twelfth embodiment is different from the configuration of the human body cooling device 10 which is premised on the points described below.

The cooling function unit 110 includes a heat pipe. The heat pipe contains the pipe and the hydraulic fluid. The pipe is made of a material with high thermal conductivity. Examples of materials having high thermal conductivity include aluminum, iron, stainless steel, copper and the like. The hydraulic fluid is a volatile liquid. The hydraulic fluid is sealed inside the pipe. The heat pipe includes a heat absorbing part and a heat radiating part. The endothermic part exchanges heat with the part to be cooled. The heat radiating part dissipates the heat transferred from the heat absorbing part to the heat radiating part.

(Embodiment 13)
The human body cooling device 10 of the twelfth embodiment is configured on the premise of any one of the human body cooling devices 10 of the first to twelfth embodiments. The configuration of the human body cooling device 10 according to the thirteenth embodiment is different from the configuration of the human body cooling device 10 which is premised on the points described below.

The cooling function unit 110 includes a temperature control unit. In one example, the temperature control unit includes a Pelche cooling unit. The Perche cooling unit includes a Perche element, a metal plate, a heat sink, a fan, a temperature sensor, and the like. The perche element includes a first end and a second end in a predetermined direction. The metal plate is provided at the first end of the Pelche element. The heat sink is provided at the second end of the Pelche element. In one example, the metal plate and heat sink are made of a material with high thermal conductivity. Examples of materials having high thermal conductivity include aluminum, iron, stainless steel, copper and the like. Metal plates and heat sinks may be post-treated to improve corrosion resistance. Examples of post-treatment include painting and plating. An example of painting is painting containing nickel. An example of plating is electroless nickel plating. The fan is configured to blow air to the heat sink. When the fan is operating, heat dissipation from the heat sink is promoted. The temperature sensor measures, for example, the temperature of a metal plate. The temperature sensor is electrically connected to the control unit 400. The measurement signal of the temperature sensor is transmitted to the control unit 400. The control unit 400 controls the current flowing through the Pelche unit so that the cooled portion is cooled.

(Example)
A pressurization test that measures the effect of pressurization of the pressurized part by the pressurized part of the human body cooling device, pressurization of the pressurized part by the pressurized part of the human body cooling device, and the cooling part of the human body cooling device A cooling test was conducted to measure the effect of cooling the area to be cooled.

The contents of the pressurization test will be described. In the pressurization test, the pressurized part of the subject was pressurized by the pressurizing part of the human body cooling device, the blood flow rate and blood volume were measured, and the effect of the pressurization on the heat exchange of blood was examined. The measured blood flow is tissue blood flow (flow). The measured blood volume is the tissue blood volume (mass). Tissue blood flow is the amount of blood that flows in a unit time with respect to 100 g of living tissue weight. The unit of tissue blood flow is [ml / min / 100g]. Tissue blood volume is the volume of blood (red blood cells) and is a dimensionless number. FIG. 10 shows the measurement results regarding blood flow rate, blood volume, etc. by the pressurization test.

The conditions for the pressure test were set as follows.
There are two environmental conditions, temperature and relative humidity. The temperature is 27.0 ° C. Relative humidity is 50%.

The blood flow rate and the blood volume measuring device are Omega Flow FLO-C1, a laser Doppler blood flow meter manufactured by Omega Wave. The probe is a measurement depth switching type probe ML type manufactured by Omega Wave. The temperature measuring device is a data collection type handy type thermometer LT-8A manufactured by Gram Co., Ltd.

The conditions for pressurization of the pressurized part are shown. A pressurizing part was attached to the left wrist of the subject. The mounting part of the pressurizing part includes a cloth and an inner bag. The pressurizing function part includes an airbag. The inner bag is provided on the cloth. The airbag is installed inside the inner bag. The size of the cloth is 14 cm x 52 cm. The size of the airbag is 12 cm x 24 cm. The cloth was wrapped around the left wrist, and the pressure part was attached to the left wrist.

The age group of the subjects is 30 to 40 years old. The subject's gender is male. Subjects have no smoking habits and no cardiovascular disease. The number of subjects is 10. Subject's clothing is a short-sleeved shirt and shorts. The material of the short sleeve shirt is 100% cotton. The material of the shorts is 100% polyester.

The conditions related to the behavior of the subject are shown. From the night before the test day, subjects were prohibited from alcohol intake, caffeine intake, and strenuous exercise. The last meal of the subject was at least 2 hours before the start of the study. Subjects changed into the prescribed clothing before the start of the test and then entered the artificial weather room set under environmental conditions. An comfort chair and a jig for fixing the arm were prepared in advance in the artificial weather room. The arm fixing jig was hung above the subject's head at a corresponding position so that the subject sitting in the comfort chair could use it.

To acclimatize the environment, the subjects were seated in comfort chairs and rested for a predetermined period of time. 30 minutes was selected as the predetermined time. After a lapse of a predetermined time, the subject's left arm was set on the arm fixing jig. The height of the arm fixing jig was adjusted so that the subject's posture was most stable so that the change in blood flow due to the subject's posture was suppressed. The state in which the subject is at rest is referred to as resting.

The resting blood flow and blood volume were measured over a predetermined time. 10 minutes was selected as the measurement time. The pressure of 0 mmHg in FIG. 10 corresponds to resting. The interfiber distance of the probe connected to the laser Doppler blood flow meter is 0.7 mm. Under this condition, the measurement depth of the skin is about 1.4 mm.

After measuring the blood flow rate and blood volume at rest, air was supplied to the airbag in units of 10 mmHg every 2 minutes. Blood flow rate and blood volume were measured in units of 10 mmHg in a pressure range of 10 mmHg to 80 mmHg.

The amount of heat exchanged between blood and skin is calculated by the following equation.

Q = h × A × △ T

Q is the exchange heat amount (W). h is the heat transfer coefficient (W / m ² K). A is the heat exchange area (m ² ). ΔT is the temperature difference (K).

The relationship between finger blood flow and skin thermal conductivity has been clarified experimentally from the reference (Akio Nakayama et al., "Thermal Characteristics of the Human Body", Medical Electronics and Human Body Engineering, Vol. 24 (1986), No. 4). It has been shown that when the blood flow range is 0 ml / min / 100 g to 80 ml / min / 100 g and the blood flow increases by about 50%, the thermal conductivity increases linearly by about 10%. For example, if the blood flow rate during pressurization increases by 10% with respect to the blood flow rate at rest, it can be interpreted that the thermal conductivity increases by 2%.

If we interpret that the blood volume in the palm is proportional to the volume of the blood vessels, we can assume that the length of the blood vessels at pressurization is equal to the length of the blood vessels at rest. Blood volume is proportional to the cross-sectional area of the blood vessel and the diameter of the blood vessel, and the following equation holds.

MP / MR = AP / AR = (RP / RR) ²

MP is the blood volume at the time of pressurization. MR is the amount of blood at rest. AP is the cross-sectional area of the blood vessel at the time of pressurization. AR is the cross-sectional area of the blood vessel at rest. RP is the diameter of the blood vessel when pressurized. RR is the diameter of the blood vessel at rest.

For example, when the blood volume at the time of pressurization increases by 10% with respect to the blood volume at rest, the blood volume at the time of pressurization is 1.049. It can be interpreted that the heat exchange area increased by 4.9%.

The heat transfer coefficient and heat exchange area shown in FIG. 10 are relative values normalized with the heat transfer coefficient and heat exchange area at rest as 100. The relative sum is the sum of the relative value of the heat transfer coefficient and the relative value of the heat exchange area.

From the measurement results of the pressurization test, it was confirmed that the blood flow rate decreased as the pressure in the pressurizing section increased. When the pressure of the pressurizing portion is included in the range of 20 mmHg to 80 mmHg, the blood flow rate is increased by about 15% to 23%. A pressure range in which the sum of relative values exceeds 200 can be interpreted as a range having a more favorable effect on increasing the amount of heat exchanged between the cooled portion and the cooled portion.

The contents of the cooling test will be described. In the cooling test, the pressurized part of the human body cooling device pressurizes the subject's pressurized part, and the cooling part of the human body cooling device cools the subject's cooled part, and the measurement items are pressurized and cooled. The effect was measured. The measurement items are blood flow, blood volume, palm skin temperature (hereinafter referred to as "palm skin temperature"), and sublingual temperature (hereinafter referred to as "sublingual temperature"). The measured blood flow is the tissue blood flow. The measured blood volume is the tissue blood volume. FIG. 11 shows the measurement results regarding the blood flow rate and the blood volume by the cooling test. FIG. 12 shows the measurement results regarding the sublingual temperature by the cooling test. FIG. 13 shows the measurement results regarding the palm skin temperature by the cooling test.

In the cooling test, three types of cooling conditions, the first to third cooling conditions, were set. In FIGS. 11 to 13, the measurement result based on the first cooling condition is "control", the measurement result based on the second cooling condition is "cooling", and the measurement result based on the third cooling condition is "cooling and pressurization". ".

The contents of the first cooling condition are shown. A cooling unit was attached to the subject to be cooled. A cold storage agent was used as the cooling function unit. A cold storage agent left under environmental conditions was used as the cold storage agent. A pressurizing part was attached to the subject's pressurized part. Do not pressurize the part to be pressed by the pressurizing part.

The contents of the second cooling condition are shown. A cooling unit was attached to the subject to be cooled. A cold storage agent was used as the cooling function unit. As the cold storage agent, a cold storage agent kept in a temperature range for cooling the part to be cooled was used. 12 ° C. was selected as the temperature of the cold storage agent. A pressurizing part was attached to the subject's pressurized part. Do not pressurize the part to be pressed by the pressurizing part.

The contents of the third cooling condition are shown. A cooling unit was attached to the subject to be cooled. As the cold storage agent, a cold storage agent kept in a temperature range for cooling the part to be cooled was used. 12 ° C. was selected as the temperature of the cold storage agent. A pressurizing part was attached to the subject's pressurized part. The pressurized part was pressurized by the pressurized part. 40 mmHg was selected as the pressure of the pressurizing part. 15 minutes was selected as the pressurization time.

Cooling tests based on each cooling condition were performed at different times. The order of the cooling tests based on each cooling condition was set, and the cooling tests of the next order were carried out at predetermined intervals from the cooling tests of the previous order. One week was selected as the predetermined interval.

Other conditions related to the cooling test were set as follows.
There are two environmental conditions, temperature and relative humidity. The temperature is 32.0 ° C. The relative humidity is 60%.

The blood flow rate and blood volume measuring device, probe, and temperature measuring device are the same as those used in the pressurization test.

The conditions for pressurization of the pressurized part are shown. A pressurizing part was attached to the left wrist of the subject. The mounting part of the pressurizing part includes a cloth and an inner bag. The pressurizing function part includes an airbag. The inner bag is provided on the cloth. The airbag is installed inside the inner bag. The size of the cloth is 14 cm x 52 cm. The size of the airbag is 12 cm x 24 cm. The cloth was wrapped around the left wrist, and the pressure part was attached to the left wrist.

The conditions for cooling the part to be cooled are shown. The cooling unit was set on the left palm so that the cooling unit was in close contact with the palm. The size of the cold storage agent is 250 mm × 150 mm × 25 mm. The content of the cold storage agent is 800 g. The content of the ice pack is a gel composition. In the measurement of each measurement item, the cooling part was removed from the cooled part at the end of the pressurization of the pressurized part.

The conditions for measuring the sublingual temperature are shown. The tip of a probe for measuring sublingual temperature was sandwiched under the subject's tongue. The probe cable was pulled out from the corner of the mouth and fixed to the cheek.

The conditions for measuring palm skin temperature are shown. The tip of the probe for measuring palm skin temperature was fixed to the terminal segment of the middle finger of the left hand by a fixing means. Adhesive seal was selected as the fixing means. The fixed portion of the tip of the probe is a portion separated from the finger portion between the middle finger of the left hand and the ring finger of the left hand by a predetermined distance on the wrist side. About 1 cm was selected as the predetermined distance.

The age group of the subjects is 30 to 40 years old. The subject's gender is male. Subjects have no smoking habits and no cardiovascular disease. The number of subjects is 10. Subject's clothing is a short-sleeved shirt and shorts. The material of the short sleeve shirt is 100% cotton. The material of the shorts is 100% polyester.

The conditions related to the behavior of the subject are shown. From the night before the test day, subjects were prohibited from alcohol intake, caffeine intake, and strenuous exercise. The last meal of the subject was at least 2 hours before the start of the study. Subjects changed into the prescribed clothing before the start of the test and then entered the artificial weather room set under environmental conditions. An comfort chair and a jig for fixing the arm were prepared in advance in the artificial weather room. The arm fixing jig was hung above the subject's head at a corresponding position so that the subject sitting in the comfort chair could use it.

To acclimatize the environment, the subjects were seated in comfort chairs and rested for a predetermined period of time. 30 minutes was selected as the predetermined time. After a lapse of a predetermined time, the subject's left arm was set on the arm fixing jig. The height of the arm fixing jig was adjusted so that the subject's posture was most stable so that the change in blood flow due to the subject's posture was suppressed. Blood flow and blood volume at rest were measured. The interfiber distance of the probe connected to the laser Doppler blood flow meter is 0.7 mm. Under this condition, the measurement depth of the skin is about 1.4 mm.

It should be noted that the description of each of the above embodiments and examples is not intended to limit the possible forms of the human body cooling device according to the present disclosure. The human body cooling device according to the present disclosure may take a form different from the form exemplified in each embodiment and the embodiment. One example is a form in which a part of the configuration of each embodiment and the embodiment is replaced, changed, or omitted, or a new configuration is added to each embodiment and the embodiment.

The human body cooling device of the present disclosure can be used for cooling the human body performing activities such as sports.

10: Human body cooling device 100: Cooling unit 200: Pressurizing unit 400: Control unit

Claims (10)

A cooling part that cools the part to be cooled of the limbs,
A human body cooling device including a pressurized portion that pressurizes a pressurized portion closer to the trunk than the cooled portion in the body limb. The cooling unit cools the hands included in the cooled portion, and the cooling unit cools the hands included in the cooled portion.
The human body cooling device according to claim 1, wherein the pressurizing portion pressurizes an arm included in the pressurized portion. The human body cooling device according to claim 2, wherein the pressurized portion pressurizes the wrist included in the pressurized portion. The cooling unit cools the foot contained in the cooled portion, and the cooling unit cools the foot.
The human body cooling device according to any one of claims 1 to 3, wherein the pressurizing portion pressurizes a leg included in the pressurized portion. The human body cooling device according to claim 4, wherein the pressurized portion pressurizes the ankle included in the pressurized portion. The human body cooling device according to any one of claims 1 to 5, further comprising a control unit that controls the pressurizing unit. The human body cooling device according to claim 6, wherein the control unit controls the pressurizing unit according to a state of the human body including the limbs. 6. Human body cooling system. The human body cooling device according to any one of claims 1 to 8, wherein the pressure of the pressurizing portion is 10 mmHg or more. The human body cooling device according to any one of claims 1 to 9, wherein the pressure of the pressurizing portion is 50 mmHg or less.

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