Cooling clothes with partitioned cooling function

Abstract

The invention provides a cooling garment with a partitioned cooling function, and belongs to the technical field of protective garments, the cooling garment with the partitioned cooling function comprises a garment body, a plurality of phase change assemblies, heat conduction cloth and radiation cooling cloth, and the outer surface of the garment body is provided with a plurality of pockets; the plurality of phase change assemblies are arranged in the plurality of pockets in a one-to-one correspondence manner; each phase change assembly comprises a cooling box and a phase change material filled in the cooling box; the heat conduction cloth is arranged between the garment body and the phase change assembly. The radiation cooling cloth is arranged on the side, away from the garment body, of the phase change assembly. Wherein the dosage proportion of the phase-change materials of the trunk and the head in the garment body is 0.91: 0.09, and the dosage proportion of the phase-change materials of the trunk front side, the trunk rear side, the trunk left side, the trunk right side and the neck in the garment body is 0.44: 0.44: 0.035: 0.035: 0.05.

Description

Technical Field

[0001] The invention belongs to the technical field of protective clothing, and in particular relates to a cooling clothing with zoned cooling. Background Art

[0002] Heat exhaustion is caused by exposure to high temperatures and is often accompanied by symptoms of dehydration. Heat exhaustion often occurs in outdoor workers such as traffic police, firefighters, and power grid workers, and in people wearing closed protective clothing. If not treated promptly, heat exhaustion can develop into heat stroke, which can cause damage to the brain and other organs, and in some cases even lead to death. When a person experiences heat-related symptoms, cooling measures must be implemented as soon as possible to reduce the person's core body temperature. In addition, preemptive cooling strategies can be used to maintain a person's core body temperature within a healthy range to prevent heat exhaustion. This preemptive cooling strategy can also improve athletic performance.

[0003] One cooling strategy for preventing or treating heat exhaustion includes wearing cooling suits to cool down. Existing cooling suits include gas cooling suits, liquid cooling suits, phase change cooling suits, semiconductor cooling suits, etc. Phase change cooling suits are widely used due to their portability. Previous studies on phase change cooling suits only considered insulating the outside of the packaging bag, that is, only considering convective heat exchange with the environment. In the real environment, the radiant heat from the sun cannot be ignored. In addition, most designs of cooling suits are detachable pocket designs, which do not consider the fit of the packaging bag to the human body and the cooling of the head, and there is a lack of research on the amount of phase change materials used in various parts. Summary of the invention

[0004] The embodiment of the present invention provides a cooling suit with zoned cooling, aiming to solve the technical problems that the existing phase change cooling suit does not consider the fit between the packaging bag and the human body and the cooling of the head, and lacks research on the amount of phase change material used in each part.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a cooling clothing with zoned cooling, comprising a clothing body, a plurality of phase change components, a heat-conducting fabric, and a radiation cooling fabric, wherein the outer surface of the clothing body has a plurality of pockets, and the plurality of pockets are distributed on the upper body, neck, and head of the wearer; the plurality of phase change components are installed in the plurality of pockets one by one, and the phase change components include a cooling box and a phase change material filled in the cooling box; the heat-conducting fabric is arranged between the clothing body and the phase change component; the radiation cooling fabric is arranged on the side of the phase change component away from the clothing body; Among them, heat radiation and heat convection are formed between the external environment and the radiation cooling layer, the ratio of the phase change material usage in the torso and the head in the clothing body is 0.91:0.09, and the ratio of the phase change material usage in the front of the torso, the back of the torso, the left side of the torso, the right side of the torso and the neck in the clothing body is 0.44:0.44:0.035:0.035:0.05.

[0006] In a possible implementation, the dosage calculation formula of the phase change material is:

[0007] Where, t is time, unit is s; A is the cooling skin surface area, unit: m 2 ; M is the metabolic rate of the human body, in W / m 2 ; W is the work done by the human body, unit is W / m 2 ; It is the convection heat transfer between the human body surface and the environment, in W / m 2 ; E is the heat loss from skin evaporation, unit: W / m 2 ; It is the sum of latent heat and sensible heat of phase change material, in J / kg; m is the required mass of phase change material, in kg.

[0008] In a possible implementation, the thermally conductive fabric is one of gold and silver thread fabric, coated cotton fabric, metal fiber fabric, and honeycomb fabric.

[0009] In a possible implementation, the pocket is provided with an opening, and the opening is opened and closed by a zipper, Velcro or a button.

[0010] In a possible implementation, the zoned cooling clothing further includes: A plurality of pressure sensors are disposed on the cooling box in a one-to-one correspondence; A plurality of temperature sensors are disposed on the cooling box in a one-to-one correspondence; The control terminal is respectively connected to the plurality of pressure sensors and the plurality of temperature sensors for communication, and the control terminal is used to display the real-time values ​​of each of the pressure sensors and each of the temperature sensors.

[0011] In a possible implementation, the control terminal is also provided with an alarm device, and the multiple temperature sensors are divided into three areas: upper body, neck and head. When the average value of all the temperature sensors in each area exceeds a first preset value, the alarm device starts to alarm; the multiple pressure sensors are divided into three areas: upper body, neck and head. When the average value of all the pressure sensors in each area exceeds a second preset value, the alarm device starts to alarm.

[0012] In a possible implementation, the garment body is a hooded vest, and a tightening device is further provided on the vest to enable the phase change component to fit the wearer's skin.

[0013] In a possible implementation, the tightening device is a zipper, an elastic cord, a tie, etc.

[0014] In a possible implementation, the phase change material is a mixture of one or more inorganic phase change materials and organic phase change materials.

[0015] In a possible implementation, a plurality of the phase change components are symmetrically arranged on the left and right sides of the clothing body.

[0016] Compared with the prior art, the scheme shown in the embodiment of the present application is that after the operator wears it, due to the outdoor environment, the outermost radiation cooling fabric can reflect and absorb the sunlight radiation, and the phase change material undergoes a phase change from solid to liquid. In this process, it absorbs heat to cool the wearer, and because the inner side of the phase change component is provided with a thermal conductive fabric, the uniformity of cooling can be enhanced; the phase change component uses a cooling box to accommodate the phase change material, which can enhance the mechanical properties of the phase change component, is not easy to break, and has a longer service life; according to the different metabolic heat production of different parts, the amount of phase change material used in different parts is different, which not only saves resources but also improves the portability of the clothing body. The cooling clothing of the present application has a simple structure and is easy and reliable to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the front view of the cooling suit with zoned cooling provided by an embodiment of the present invention; Figure 2 A schematic diagram of the rear view structure of a cooling suit with zoned cooling provided by an embodiment of the present invention; Figure 3 It is a schematic cross-sectional structure diagram of a phase change component used in an embodiment of the present invention.

[0018] Description of reference numerals: 10- Garment body; 11- Pocket; 20-phase change component; 21-cooling box; 22-phase change material; 23-pressure sensor; 24-temperature sensor; 30-thermal conductive fabric; 40- Radiant cooling fabric; 50-control terminal; 51-alarm device; 60-Tightening device. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] In the claims, specifications and the above drawings of the present invention, unless otherwise clearly defined, the terms "first", "second" or "third" are used to distinguish different objects, rather than to describe a specific order. In the claims, specifications and the above drawings of the present invention, the terms "upper", "lower", "top" and "bottom" are the same as the upper and lower directions of the wearer, the terms "front", "back", "left" and "right" are the same as the front and back directions of the wearer, the term "inside" refers to the direction of the human body, and the term "outside" refers to the direction away from the human body; the remaining directional words, unless otherwise clearly defined, such as the use of the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "clockwise", "counterclockwise", "high", "low" and the like to indicate the direction or position relationship are based on the direction and position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the present invention.

[0021] In the claims, specification and the above drawings of the present invention, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0022] In the claims, description and drawings of the present invention, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0023] Please also read Figure 1 up Figure 3, the cooling clothing with zoned cooling provided by the present invention is now described. The cooling clothing with zoned cooling includes a clothing body 10, a plurality of phase change components 20, a heat conductive fabric 30 and a radiation cooling fabric 40. The outer surface of the clothing body 10 has a plurality of pockets 11, and the plurality of pockets 11 are distributed on the upper body, neck and head of the wearer; the plurality of phase change components 20 are installed in the plurality of pockets 11 one by one, and the phase change components 20 include a cooling box 21 and a phase change material 22 filled in the cooling box 21; the heat conductive fabric 30 is arranged between the clothing body 10 and the phase change component 20; the radiation cooling fabric 40 is arranged on the side of the phase change component 20 away from the clothing body 10; Among them, the ratio of the phase change material 22 used in the torso and head in the clothing body 10 is 0.91:0.09, and the ratio of the phase change material 22 used in the front of the torso, the back of the torso, the left side of the torso, the right side of the torso, and the neck in the clothing body 10 is 0.44:0.44:0.035:0.035:0.05.

[0024] It should be noted that during operation, heat conduction is carried out in the manner of external environment → radiation cooling layer → outer side of cooling box 21 → inner side of cooling box 21 → heat conductive fabric 30 → human skin, wherein heat radiation and heat convection are formed between the external environment and the radiation cooling layer.

[0025] Compared with the prior art, the zoned cooling cooling clothing provided in the present embodiment is different from the prior art in that after the operator wears it, due to being in an outdoor environment, the outermost radiation cooling fabric 40 can reflect and absorb the sunlight radiation, and the phase change material 22 undergoes a phase change from solid to liquid. In this process, it absorbs heat to cool the wearer, and since the inner side of the phase change component 20 is provided with a heat conductive fabric 30, the uniformity of cooling can be enhanced; the phase change component 20 adopts a cooling box 21 to accommodate the phase change material 22, which can enhance the mechanical properties of the phase change component 20, making it less prone to rupture and having a longer service life; according to the different metabolic heat production of different parts, the amount of phase change material 22 used in different parts is different, which not only saves resources but also improves the portability of the clothing body 10. The cooling clothing of the present application has a simple structure and is convenient and reliable to operate.

[0026] In some embodiments, a specific calculation method for the amount of the phase change material 22 can be performed using the following steps. The calculation formula for the amount of the phase change material 22 is:

[0027] Where, t is time, unit is s; A is the cooling skin surface area, unit: m 2 ; M is the metabolic rate of the human body, in W / m 2 ; W is the work done by the human body, unit is W / m 2 ; It is the convection heat transfer between the human body surface and the environment, in W / m 2 ; E is the heat loss from skin evaporation, unit: W / m 2 ; It is the sum of latent heat and sensible heat of phase change material 22, in J / kg; m is the mass of the phase change material 22 required, in kg.

[0028] In order to determine the amount of phase change material 22 used, the following assumptions can be made: the heat exchange between the human body and the environment is completely absorbed by the phase change material 22, the latent heat and sensible heat of the phase change material 22 are considered in the heat absorption section, and the sensible heat absorption temperature is not greater than 30°C. Since the proportion of respiratory heat dissipation in the total heat dissipation of the human body is generally less than 5%, the respiratory heat dissipation of the human body is ignored. The heat exchange on the surface of the human body includes heat convection and heat radiation. Since the radiation cooling fabric 40 is set on the outside of the clothing body 10, the influence of thermal radiation is not considered.

[0029] For the sake of convenience, the calculation is carried out using the working conditions of power grid workers as an example.

[0030] Among them, t is two hours; The surface area of ​​an adult's torso is 0.63 m 2 , head about 0.051m 2 , different locations bring different surface area data A into the formula; Power grid workers working in a high temperature environment are considered to have moderate exercise intensity, and M is 200W / m 2 ; If the phase change material 22 is ice, the latent heat of phase change of ice is 335 kJ / kg. After the ice turns into water, the sensible heat of the temperature rising from 0°C to 26°C (the cooling effect decreases after exceeding this temperature) is 4.18 kJ / (kg·°C)×26゜C=108.68 kJ / kg, so we can get The value of is 443.68 J / kg; The basic metabolic data of different parts of the human body are shown in Table 1:

[0031] Table 1 Basal metabolic values ​​of different parts of the human body and their proportion in the total surface area of ​​the human body By substituting the above example values ​​into the calculation formula, it can be obtained that the amount of phase change material 22 required for the torso is 1.32 kg, and the amount of phase change material 22 required for the head is 0.12 kg.

[0032] In specific implementation, according to the changes in ambient temperature and different operators, the usage ratio of the phase change material 22 will be reduced or increased accordingly, making the usage of the phase change material 22 more scientifically based, and the usage of the phase change material 22 is used reasonably to reduce costs and improve wearing comfort.

[0033] In some embodiments, a specific implementation of the thermal conductive fabric 30 is as follows: the thermal conductive fabric 30 is one of gold and silver thread fabric, coated cotton fabric, metal fiber fabric, and honeycomb fabric.

[0034] Gold and silver thread fabric is woven with gold and silver threads. The gold and silver threads are made of two layers of butyl acetate cellulose film sandwiched with a layer of aluminum foil and then cut into thin strips. Because it contains aluminum foil inside, the aluminum foil has good thermal conductivity. The thermal conductivity principle is mainly due to the very fast heat conduction speed of aluminum and the large surface area of ​​aluminum foil, so heat is easily conducted and evenly distributed. At the same time, the thickness of aluminum foil is relatively thin, and the heat loss is very small during the heat conduction process, so the thermal conductivity efficiency of aluminum foil is very high.

[0035] Coated cotton cloth uses solvents (fabric factories generally use toluene or butanone) to dissolve the required coating particles (PU glue, A / C glue, PVC, PE glue) into a drooling state (related to the ratio of glue and sol, viscosity, etc.) and then evenly applies it to the cloth (cotton, polyester, nylon and other base materials) in a scraper manner. After being fixed by the temperature in the oven, a uniform layer of covering glue is formed on the surface of the fabric, thereby achieving waterproof, windproof, breathable and other functions. Silver coating can be used on the cotton cloth to achieve good thermal conductivity.

[0036] Metal fiber cloth is a cloth with metal fibers woven into it. Metal fiber refers to a fiber-shaped material with a high metal content, continuous distribution of metal materials, and a lateral size of micrometers. It is usually composed of metal, metal alloy, metal coated with plastic, plastic coated with metal, or a core completely covered with metal. Since metal has good thermal conductivity, the corresponding metal fiber cloth can also achieve a uniform cooling effect.

[0037] The honeycomb cloth has a good heat and cold storage effect due to its honeycomb surface. When the cold energy of the phase change material 22 is transferred to the honeycomb cloth, the honeycomb cloth can store the cold energy in the honeycomb structure, thereby making the cooling uniform and extending the cooling time.

[0038] In some embodiments, an improved implementation of the pocket 11 may adopt the following structure. Not shown in the figure, the pocket 11 is provided with an opening, which is opened and closed by a zipper, Velcro or button, so as to facilitate the replacement of the phase change component 20. The zipper, Velcro or button can be used to open the pocket 11 and replace the phase change component 20 in the pocket 11. The phase change material 22 can be replaced after being changed from solid to liquid and then put into the pocket 11.

[0039] It should be noted that, in order to facilitate the replacement of the phase change material 22, the cooling box 21 can also be an openable and closable structure, and the phase change material 22 can be directly filled into the cooling box 21. In this case, in order to prevent the phase change material 22 from leaking, the opening and closing positions of the cooling box 21 need to be sealed; the phase change material 22 can also be filled into a film and then placed in the cooling box 21. In this case, the cooling box 21 does not need to be sealed, which is more convenient to use.

[0040] Specifically, the cooling box 21 may also be made of a material with good thermal conductivity, such as aluminum, to ensure the cooling effect of the phase change material 22 .

[0041] It is easy to understand that the radiation cooling fabric 40 is arranged on the outside of the clothing body 10, and the radiation cooling fabric 40 covers the entire area of ​​the clothing body 10 with and without pockets 11. The pockets 11 and the clothing body 10 are made of the same fabric, and when the zipper, Velcro or button opens the pocket 11, the radiation cooling fabric 40 is also opened at the same time; as a variation, the radiation cooling fabric 40 can also be directly used to surround the pocket 11, and the zipper, Velcro or button is directly arranged on the radiation cooling fabric 40. Correspondingly, the thermal conductive fabric 30 can also cover the entire area of ​​the clothing body 10 with and without pockets 11, or can be arranged only on the inner side of the pocket 11.

[0042] In some embodiments, an improved implementation of the above-mentioned zone cooling cooling suit can be adopted as follows Figures 1 to 3 See the structure shown. Figures 1 to 3 The zoned cooling clothing also includes a plurality of pressure sensors 23, a plurality of temperature sensors 24 and a control terminal 50. The plurality of pressure sensors 23 are arranged on the cooling box 21 in a one-to-one correspondence; the plurality of temperature sensors 24 are arranged on the cooling box 21 in a one-to-one correspondence; the control terminal 50 is communicatively connected with the plurality of pressure sensors 23 and the plurality of temperature sensors 24 respectively, and the control terminal 50 is used to display the real-time values ​​of each pressure sensor 23 and each temperature sensor 24.

[0043] The control terminal 50 can be a mobile phone or an operating device carried by the operator. The pressure value and temperature value of the phase change component 20 can be observed in real time through the control terminal 50. Before the operator performs the operation, the temperature and pressure of each phase change component 20 can be observed through the control terminal 50, so that the phase change component 20 can be replaced in time, which can ensure the cooling effect during the operation and avoid the cooling effect of the phase change material 22 deteriorating during the operation, affecting the cooling effect on the operator and causing accidents.

[0044] It is easy to imagine that not only can the operating personnel observe the pressure and temperature of each phase change component 20, but it can also be transmitted to the mobile phones or devices of multiple workers at the same time, so that the underground safety personnel can also pay attention to the working status of the cooling suit in real time.

[0045] In addition, in order to facilitate the carrying of the control terminal 50 , an opening pocket 11 specifically for preventing the control terminal 50 from entering can also be provided on the clothing body 10 .

[0046] In some embodiments, an improved implementation of the control terminal 50 may be as follows: Figure 1 to Figure 2 See the structure shown. Figure 1 to Figure 2 The control terminal 50 is also provided with an alarm device 51. The multiple temperature sensors 24 are divided into three areas: the upper body, the neck and the head. When the average value of all the temperature sensors 24 in each area exceeds the first preset value, the alarm device 51 starts to alarm; the multiple pressure sensors 23 are divided into three areas: the upper body, the neck and the head. When the average value of all the pressure sensors 23 in each area exceeds the second preset value, the alarm device 51 starts to alarm.

[0047] The alarm device 51 can give an alarm in time to remind the user to replace the phase change assembly 20 in time, so as to avoid the operator forgetting to check the pressure and temperature of the phase change assembly 20 due to being too focused on the operation or being short of time before the operation.

[0048] In some embodiments, a specific implementation of the above-mentioned clothing body 10 can be as follows Figure 1 to Figure 2 See the structure shown. Figure 1 to Figure 2 The clothing body 10 is a hooded vest, and a tightening device 60 is also provided on the vest to make the phase change component 20 fit the wearer's skin.

[0049] The hooded vest can realize the arrangement of pockets 11 on the head, neck and upper body, so that the phase change component 20 can cool the head, neck and upper body, and after the wearer puts it on, the tightening device 60 can be used to make each phase change component 20 fit the skin, so as to achieve better cooling effect and better comfort.

[0050] In some embodiments, a specific implementation of the tightening device 60 can be as follows: Figure 1 to Figure 2 See the structure shown. Figure 1 to Figure 2 The tightening device 60 is a zipper, elastic cord, laces, etc. The zipper is set at the symmetry axis of the vest. After wearing the vest, zipping up the zipper can prevent the vest from falling off under the weight of the phase change assembly 20; the elastic cord, laces, etc. are similar, and the dimensions of the vest can be adjusted by the tightening degree of the elastic cord or laces, so that it can be worn by operators of different body shapes.

[0051] Specifically, the phase change material 22 can be a mixture of one or more inorganic phase change materials 22 and organic phase change materials 22 .

[0052] In some embodiments, a specific distribution method of the phase change components 20 can be as follows: Figure 1 to Figure 2 See the structure shown. Figure 1 to Figure 2 , multiple phase change components 20 are symmetrically arranged on the left and right sides of the clothing body 10. The symmetrical distribution of the phase change components 20 on the left and right sides of the clothing body 10 can make the cooling effect on the human body uniform, avoid different temperatures felt by different parts, and enhance the comfort of wearing the cooling clothing.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cooling suit with zone cooling, characterized in that: The invention comprises a garment body, a plurality of phase change components, a heat-conducting fabric, and a radiation cooling fabric. The outer surface of the garment body has a plurality of pockets, and the plurality of pockets are distributed on the upper body, neck, and head of the wearer. The plurality of phase change components are installed in the plurality of pockets one by one, and the phase change components include a cooling box and a phase change material filled in the cooling box. The heat-conducting fabric is arranged between the garment body and the phase change component. The radiation cooling fabric is arranged on the side of the phase change component away from the garment body. Among them, heat radiation and heat convection are formed between the external environment and the radiation cooling layer, the ratio of the phase change material usage in the torso and the head in the clothing body is 0.91:0.09, and the ratio of the phase change material usage in the front of the torso, the back of the torso, the left side of the torso, the right side of the torso and the neck in the clothing body is 0.44:0.44:0.035:0.035:0.

05.

2. The zone cooling clothing according to claim 1, characterized in that: The calculation formula for the amount of the phase change material is: Where, t is time, unit is s; A is the cooling skin surface area, unit: m 2 ; M is the metabolic rate of the human body, in W / m 2 ; W is the work done by the human body, unit is W / m 2 ; It is the convection heat transfer between the human body surface and the environment, in W / m 2 ; E is the heat loss from skin evaporation, unit: W / m 2 ; It is the sum of latent heat and sensible heat of phase change material, in J / kg; m is the required mass of phase change material, in kg.

3. The zoned cooling clothing according to claim 1, characterized in that: The heat-conducting fabric is one of gold and silver thread fabric, coated cotton fabric, metal fiber fabric and honeycomb fabric.

4. The zoned cooling clothing according to claim 1, characterized in that: The pocket is provided with an opening, and the opening is opened and closed by a zipper, Velcro or a button.

5. The zoned cooling clothing according to claim 1, characterized in that: The zone cooling cooling suit also includes: A plurality of pressure sensors are disposed on the cooling box in a one-to-one correspondence; A plurality of temperature sensors are disposed on the cooling box in a one-to-one correspondence; The control terminal is respectively connected to the plurality of pressure sensors and the plurality of temperature sensors for communication, and the control terminal is used to display the real-time values ​​of each of the pressure sensors and each of the temperature sensors.

6. The zoned cooling clothing according to claim 5, characterized in that: The control terminal is also provided with an alarm device. The multiple temperature sensors are divided into three areas: upper body, neck and head. When the average value of all the temperature sensors in each area exceeds a first preset value, the alarm device starts to alarm. The multiple pressure sensors are divided into three areas: upper body, neck and head. When the average value of all the pressure sensors in each area exceeds a second preset value, the alarm device starts to alarm.

7. The zoned cooling clothing according to claim 1, characterized in that: The clothing body is a hooded vest, and a tightening device is also provided on the vest to make the phase change component fit the wearer's skin.

8. The zoned cooling clothing according to claim 7, characterized in that: The tightening device is a zipper, an elastic cord, a lace, etc.

9. The zoned cooling clothing according to claim 1, characterized in that: The phase change material is a mixture of one or more inorganic phase change materials and organic phase change materials.

10. The zoned cooling clothing according to claim 1, characterized in that: The plurality of phase change components are symmetrically arranged on the left and right sides of the clothing body.

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