Self-balancing warm-body manikin and method of using the same

Abstract

The present invention discloses a self-balancing warm-body manikin and a method for using the same. The warm-body manikin simulates a sitting human body and is provided with an internal heating system and an air power system to achieve self-thermal balance. The warm-body manikin provided by the present invention can achieve a constant power of 95W and a constant temperature function on the human body surface. The constant temperature accuracy of the warm-body manikin depends on the temperature of the air-conditioned room where the manikin is located and the wind field conditions around the manikin, with a maximum accuracy of ±1.5°C. Most importantly, the manikin is a heat self-balancing manikin, and the purpose of constant power and constant temperature can be achieved without an external additional complex control system.

Description

Technical Field

[0001] The invention belongs to the technical field of warming manikins, and in particular to a self-balancing warming manikin and a use method thereof. Background Art

[0002] Residents are one of the main sources of heat and pollution in buildings. Due to the development of building energy conservation and low-energy office equipment, their influence will account for an increasing proportion of the total heat and pollution sources in buildings. The convection generated by the human body has an important influence on the indoor air distribution, especially the heat plume generated when sitting still. Therefore, the study of the heat plume of the human body sitting still is of great significance for the evaluation of thermal comfort, indoor air quality, building performance, HVAC system performance, indoor airflow organization, indoor pollutant distribution and infectious disease pathogen distribution. However, there are three limitations to using real people to conduct experiments to explore this mechanism:

[0003] (1) It will cost a lot of manpower and financial resources and is costly.

[0004] (2) When studying the thermal plume above the human body, it is difficult to use the integration method for data analysis (due to the unstable behavior of real people and the sensitive nature of the thermal plume).

[0005] (3) When conducting research related to the spread of pollutants and infectious pathogens, it is dangerous for real people.

[0006] Therefore, researchers currently generally use anthropomorphic geometric models to eliminate the above difficulties when studying human thermal plume.

[0007] In existing studies so far, researchers have mostly used simple geometric structures with heating functions and thermal manikin models with complex shapes similar to human postures to simulate the human body in a sitting position for full-scale experiments.

[0008] Simple geometries are cylinders or cuboids coated with radiative materials and with heating elements, heating cylinders, and heat pipes. However, these geometries have shown many limitations during experiments:

[0009] (1) During the experiment, simple geometric models often overheat under thermal conditions, making it difficult to achieve a constant temperature state, while the human body temperature can reach a constant temperature or a state with little temperature fluctuation in any environment. This makes it impossible for simple geometric models to accurately simulate human body temperature in simulation experiments, resulting in inaccurate experimental results.

[0010] (2) Through experimental research, it is found that the cross-sectional shape of the upper part of the heat plume generated by the human body in a sitting position is a long and narrow non-centrosymmetric figure, while the cross-sectional shape of the upper part of the heat plume generated by a simple geometric structure is a centrosymmetric figure that is quasi-circular or quasi-elliptical. In addition, the plume axis offset in the upper part of the heat plume generated by the human body is small, but the plume axis offset in the upper part of the heat plume generated by a simple geometric structure including a heating cylinder and a heat pipe is too large, often around 20 cm. It can be seen that the heat plume generated by a simple geometric structure does not accurately simulate the heat plume generated by the human body.

[0011] (3) The study of local airflow organization around the human body is the focus of human body simulation experiments. The human body has legs, which allow air and pollutants to pass between the legs, thus generating a specific airflow organization. However, simple geometric structures lack leg models and cannot simulate the local airflow organization around the human body.

[0012] (4) Related literature shows that the thermal plume generated by the anthropomorphic model is closely related to the layout of the built-in heat source. However, there is no uniform standard for the arrangement of heating equipment and the location of the heating equipment in a simple geometric structure, which makes the experimental results impossible to verify and the error of each experiment is large.

[0013] (5) The simple anthropomorphic geometric structures used in the experiment are mostly made of simple cardboard, with low simulation accuracy and are not suitable for reuse.

[0014] In addition, the experiment also uses a thermal manikin with a complex shape similar to the human body posture, i.e., a thermal manikin. The shape of the most advanced thermal manikin can accurately resemble the body of a man or a woman, and the posture of the manikin can be adjusted by adjusting the shoulders, elbows, and knees. In addition, it also has a constant temperature mechanism, a constant power mechanism, and a breathing mechanism. However, the thermal manikin has a cumbersome process and a complex structure, and its unit price is 1000-3000 times the unit price of the present invention. Its high price makes many researchers stay away.

[0015] Finally, researchers often use computational fluid dynamics (CFD) computer software to simulate the temperature and wind speed fields around the human body, thereby replacing related experiments that require real people or anthropomorphic models. However, it also has limitations, such as:

[0016] (1) The simulation results of the software are not accurate and can only provide a rough analysis. Especially for complex geometric bodies such as the human body, the simulation results near the body will not be very accurate.

[0017] (2) Software simulation requires more complex computing power and longer computing time, and the calculation cycle is very long.

[0018] The present invention can well solve the problems existing in the above-mentioned various simulation bodies and make up for the existing defects. Summary of the invention

[0019] In order to solve the problems existing in the prior art, the present invention provides a self-balancing warm-body manikin and a method of using the same, which are used to simulate a sitting human body, and replace a real person to complete related research on thermal plume, human thermal comfort and airflow organization in an air-conditioned room (room temperature 18-30°C) with or without wind.

[0020] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a self-balancing warming manikin, comprising a warming manikin body with a hollow interior, and an internal heating system and an aerodynamic system arranged in the warming manikin body, wherein the warming manikin body is in a sitting position, and comprises a manikin head, a manikin chest and a manikin leg, wherein small holes are provided on the manikin chest and the manikin leg, the internal heating system is used to simulate human body heating, and the aerodynamic system is used to achieve air flow with a constant wind speed over the head of the warming manikin body.

[0021] Furthermore, the internal heating system includes a plurality of light bulbs, which are respectively arranged in the dummy head, dummy chest and dummy legs.

[0022] Furthermore, two rows of small holes are opened on the back, left and right sides of the dummy's chest, and a single row of small holes is opened on the dummy's legs. The small holes are used for heat exchange and mass exchange between the air inside and outside the dummy.

[0023] Furthermore, the aerodynamic system includes a plurality of fans, which are respectively arranged in the dummy head, dummy chest and dummy legs, and the wind direction of the fans is upward.

[0024] Furthermore, the dummy head, dummy chest and dummy legs are connected by flanges to form a warm-body dummy body, the surface of the warm-body dummy body is made of sheet metal, the inner side of the surface is provided with rubber-plastic insulation cotton, and the dummy shoulders are provided with two layers of rubber-plastic insulation cotton.

[0025] Furthermore, the dummy head includes a fixed head and a removable top cover, a 5W light bulb is arranged in the fixed head, the light bulb is placed on a light bulb support beam, and the light bulb support beam is fixedly connected to the dummy head by rivets; a double-layer aluminum foil lampshade is arranged outside the light bulb, and the double-layer aluminum foil lampshade is used to enhance radiation heat dissipation.

[0026] Furthermore, a flange is provided on the top of the dummy chest, and the flange is used to connect the dummy chest and the dummy head; a fan is built into the upper half of the dummy chest, and the fan is placed on a fan support beam, and the fan support beam and the dummy chest are fixedly connected by rivets; two flanges of equal size are built into the lower half of the dummy chest, and the flanges are symmetrically arranged, and the flanges are used to connect the dummy legs; a 40W light bulb is provided between the two flanges, and the 40W light bulb is placed on the light bulb support beam, and the light bulb support beam and the dummy chest are fixedly connected by rivets.

[0027] Furthermore, there are two dummy legs, each of which includes a dummy thigh, a dummy knee and a dummy calf. A fan is arranged in the dummy thigh, and the fan is placed on a fan support beam. The fan support beam and the dummy thigh are fixedly connected by rivets; a 5W light bulb is built into the upper part of the dummy calf, and a 15W light bulb is built into the lower part of the dummy calf. The 15W light bulb is arranged inverted, and the 5W light bulb and the 15W light bulb are provided with corresponding light bulb support beams, and the light bulb support beam is fixedly connected to the dummy calf by rivets; a double-layer aluminum foil lampshade is arranged on the outside of the light bulb.

[0028] The present invention also discloses a method for using a self-balancing heated manikin. When the heated manikin is in a windless environment, the top cover of the heated manikin is sucked out with a washing dish before use, and all small holes on the chest and legs of the manikin are ensured to be in an open state. Then, the internal heating system and the air power system are started. After preheating for half an hour, relevant experiments on airflow organization and thermal comfort are started to simulate a real person.

[0029] When the heated manikin is in a windy environment, suck out the top cover of the heated manikin's head with a wash dish before use, open the small holes at the bottom of the manikin's calves, seal the small holes at the chest, thighs, knees, and upper calves of the manikin, and then start the internal heating system and aerodynamic system. After preheating for half an hour, start experiments on airflow organization and thermal comfort simulating a real person.

[0030] Furthermore, when used in a windless environment, the small holes on the top cover of the dummy's head, the dummy's chest and the dummy's legs must all remain open during use; when used in a windy environment, the small holes on the top cover and the bottom of the dummy's calves must be opened during use, and the small holes on the dummy's thighs, dummy knees and upper parts of the dummy's calves must be closed.

[0031] Compared with the prior art, the present invention has at least the following beneficial effects:

[0032] The self-balancing warm manikin provided by the present invention is used to simulate a sitting human body, and an internal heating system and an air power system are arranged inside the warm manikin to achieve its own thermal balance. The warm manikin provided by the present invention can achieve a constant power of 95W and a constant temperature function on the human body surface. The constant temperature accuracy of the warm manikin depends on the temperature of the air-conditioned room where the manikin is located and the wind field conditions around the manikin, with a maximum accuracy of ±1.5°C. Most importantly, the manikin is a heat self-balancing manikin, and the purpose of constant power and constant temperature can be achieved without an external additional complex control system.

[0033] Furthermore, the present invention achieves the purpose of maintaining its own thermal balance by arranging light bulbs and fans of different wattages at different parts of the manikin, and utilizing the principles of heat convection and heat radiation. The present invention has been subjected to actual testing and CFD simulation, and the results have shown that the temperature and heat generation of the warm-body manikin of the present invention can be sustained and stable, and can accurately simulate the human body. In addition, the present invention can accurately fit the human body by arranging a detachable head cover on the manikin's head and fans and light bulbs arranged inside the warm-body manikin's body to simulate the heat plume formed by the human head. From an overall perspective, the present invention will not have overheating, uneven temperature distribution, etc., and the accuracy of experimental research related to human thermal plume is guaranteed.

[0034] Furthermore, the present invention is intended to simulate human fever by building in 5W, 40W, 5W, and 15W bulbs in the dummy's head, chest, upper calf, and lower calf, respectively. Since the volumes of the dummy's head, chest, and legs are different, the epidermal areas that need to be controlled are also different. To ensure that the surfaces of different parts of the dummy obtain the same amount of heat, and that the unfavorable situation of local overheating or local hypothermia of the warm-body dummy body will not occur, the present invention has built-in bulbs of different powers in different positions. It should be particularly noted that, since the hot air in the dummy flows from bottom to top, the heat accumulated in the lower calf is the least, and a higher-power bulb, i.e., a 15W bulb, is required to provide heat. Since the leg space of the dummy is narrow, in order to ensure that the radiant heat of the bulb can reach every part of the leg evenly, the heat source of the lower calf needs to be set upside down, thereby achieving the purpose of making the dummy's epidermal temperature uniform.

[0035] Furthermore, the present invention provides a double-layer aluminum foil lampshade outside the built-in bulb. Since metal aluminum has the thermophysical properties of high thermal conductivity and high emissivity, the arrangement of the aluminum foil lampshade can not only enhance heat transfer, but also further evenly distribute the radiated heat, thereby making the dummy's skin temperature uniform. Furthermore, compared with other simple anthropomorphic geometric bodies, such as cylinders, cuboids, heating cylinders, and heat pipes, the present invention has a model structure that simulates human legs, so that when conducting specific experiments, air and pollutants are allowed to pass between the legs to generate a specific airflow organization, which can accurately simulate the local airflow organization of the air around the human body.

[0036] Furthermore, the present invention arranges double rows of small holes on the left side, right side and back of the dummy's chest; single rows of small holes are arranged on the epidermis of the dummy's thighs, knees, upper and lower calves. Through the opening of the small holes, the hot air inside the dummy can be convectively exchanged with the outside air to achieve heat exchange, and different numbers of small holes can control the exchange of different amounts of heat, thereby further preventing local overheating of the dummy and ensuring that the temperature of the dummy's epidermis is evenly distributed.

[0037] Furthermore, the warm-body manikin provided by the present invention can replace real people in conducting experiments related to studying human thermal plume and thermal comfort, which can not only reasonably simplify calculations, but also reduce manpower and material resources and save research costs, thereby making it easier to achieve the conditions for related experiments and promoting related research.

[0038] Furthermore, the present invention provides power for the flow of hot air inside the dummy by arranging fans in the chest and legs of the dummy. The wind direction of the fan is upward, so that the hot air flows from the lower part of the calf to the upper part of the calf, then to the chest, and then to the head, and finally flows out of the dummy. This arrangement is intended to force the air inside the warm-body dummy to flow, so that the hot air passes over the inside of the dummy's epidermis for convective heat exchange, and then the hot air flow exchanges heat with every part of the dummy's epidermis evenly, and the temperature is evenly distributed. In addition, the low-speed hot air flow flowing out from the top of the dummy's head can completely fit the thermal plume airflow on the top of the human head, so that the relevant experiments can achieve more accurate experimental results.

[0039] Furthermore, the present invention is provided with a detachable top cover. When the present invention is used to simulate a human body for relevant experiments, the top cover needs to be opened, and a hot air flow flows out from the top of the dummy's head to simulate the thermal plume of the human body. When the present invention is not used, the top cover needs to be covered, which can prevent water, foreign matter, dust, etc. from entering the interior of the dummy, thereby increasing the service life of the dummy.

[0040] Furthermore, the warm-body manikin provided by the present invention can replace real people to conduct experiments that are dangerous or harmful to humans, such as studying indoor air quality in densely populated areas, distribution of indoor pollutants, and transmission of infectious disease pathogens, thereby advancing the relevant research process.

[0041] Furthermore, the material used for the warm-body manikin of the present invention is sheet metal, which has the characteristics of light weight, high strength, conductivity, low cost, good large-scale mass production performance, etc. compared with the simple anthropomorphic geometric body made of cardboard used in previous experiments; thus, the present invention can be repeatedly used in experiments, which can unify standards, reduce experimental errors, and relatively reduce experimental costs; the scheme of the present invention is reasonable, the structure is simple, it is easy to implement, the accuracy of simulating the human body is high, and it is suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a front view structural schematic diagram of the present invention;

[0043] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0044] Figure 3 It is a side structural schematic diagram of the present invention;

[0045] Figure 4 is a front view of the dummy head of the present invention;

[0046] Figure 5 is a front view of the chest of a dummy of the present invention;

[0047] Figure 6 is a side view of the leg of the dummy of the present invention;

[0048] Figure 7 It is a schematic diagram of air flow in a dummy body of the present invention.

[0049] In the attached figure: 1-dummy head, 2-dummy chest, 3-dummy legs, 4-head cover, 5-dummy thighs, 6-dummy knees, 7-dummy calves, 8-5W light bulb, 9-double-layer aluminum foil lampshade, 10-light bulb support beam, 11-flange, 12-fan, 13-fan support beam, 14-rivet, 15-40W light bulb, 16-15W light bulb, 17-small hole. DETAILED DESCRIPTION

[0050] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0051] like Figure 1 A self-balancing warm-body manikin shown includes a manikin head 1, a manikin chest 2, a manikin leg 3, an internal heating system and an aerodynamic system, wherein:

[0052] like Figure 1 As shown, an internal heating system is arranged inside the warm-body manikin of the present invention, and the internal heating system includes light bulbs arranged on the manikin head 1, the manikin chest 2 and the manikin legs 3. The light bulbs are used to simulate human body fever. After being plugged in, the light bulbs convert electrical energy into thermal energy, and the heat is transferred to the insulation layer through radiation heat dissipation and convection heat transfer, and then conducted from the insulation layer and the sheet metal parts, and finally transferred to the outside of the manikin through natural convection and radiation heat transfer of the air outside the manikin.

[0053] like Figure 1As shown, the principle of achieving thermal self-balance of the warm manikin in the present invention is radiation heat dissipation and convection heat exchange. An aerodynamic system is arranged inside the warm manikin, and the aerodynamic system is composed of a plurality of fans 12. The fans 12 are arranged in the manikin head 1, the manikin chest 2 and the manikin legs 3 of the warm manikin, and the wind direction of the fans 12 is upward. The function of the fans 12 is to create positive pressure, so that the air inside the warm manikin is forced to flow, and then the hot air passes over the surface of the thermal insulation cotton inside the manikin's epidermis for forced convection heat exchange.

[0054] like Figure 1 , 2 As shown in Figures 3 and 4, the head of the heating manikin 1 is composed of a fixed head and a detachable top cover 4, both of which are sheet metal parts, with rubber and plastic insulation materials pasted on the inside. The manikin head 1 has a built-in 5W bulb 8 as a heat source to simulate human fever, and the 5W bulb 8 has a double-layer aluminum foil lampshade 9 around the bulb. The top cover 4 is detachable. Before the heating manikin is plugged in and used, the user should first suck out the top cover 4 of the heating manikin with a suction cup. Moreover, the top cover 4 of the manikin should not be covered during use to simulate the flow of hot air above the human head and ensure that the manikin does not overheat during use. The head has a built-in bulb support beam 10, which is fixed to the epidermis of the manikin head 1 with rivets 14 to place the 5W bulb 8; a double-layer aluminum foil lampshade 9 is placed outside the bulb to strengthen radiation heat dissipation; at the same time, the top cover 4 is covered when not in use to prevent dust and other particles from entering the body, and the maintenance, replacement, and cleaning of the internal device of the heating manikin also require opening the top cover 4.

[0055] like Figure 1 , 2 As shown in , 3 and 5, the head 1 and chest 2 of the warm-body manikin are connected by a flange 11. The manikin chest 2 is made of sheet metal with rubber-plastic insulation material on the inside. A fan 12 is built into the upper part of the manikin chest 2 and is placed on a fan support beam 13. The fan support beam 13 is fixed to the epidermis with rivets 14. The fan 12 is used to force convection of the air inside the manikin, so that the hot air is convected through the outer wall of the manikin with the external air to dissipate heat, to ensure that the manikin does not overheat, and to make the surface temperature of the manikin evenly distributed, thereby more accurately simulating the human body; a 40W bulb 15 is built into the lower part of the manikin chest 2 as a heat source to simulate human fever. The 40W bulb 15 is placed on a bulb support beam 10. The bulb support beam 10 is fixed to the epidermis of the manikin chest 2 with rivets 14. No aluminum foil lampshade is placed outside the bulb;

[0056] like Figure 2 and Figure 3 As shown, two rows of small holes 17 are opened on the left, right and back sides of the dummy chest 2 to allow the air inside and outside the dummy to exchange heat and mass when there is no wind in the external environment.

[0057] Preferably, two layers of rubber-plastic thermal insulation material are attached to the shoulders of the dummy. As the hot air rises, the hot air accumulates in the upper part of the internal space of the dummy and exchanges heat with the shoulder area, making its temperature higher. The greater temperature difference increases the heat exchange between the shoulder area and the outside world, so two layers of rubber-plastic thermal insulation cotton are needed to increase thermal resistance and weaken heat transfer.

[0058] like Figure 1 , 3 As shown in Figures 5 and 6, the chest 2 of the warm-body mannequin and the leg 3 of the mannequin are connected by a flange 11. The leg 3 of the mannequin is made of sheet metal, and the inner side is covered with rubber and plastic insulation material.

[0059] like Figure 1 , 2 As shown in , 5, the dummy leg 3 includes a dummy thigh 5, a dummy knee 6 and a dummy calf 7. The dummy thigh 5 of the two dummy legs 3 is equipped with a built-in fan 12, which is placed on a fan support beam 13, and the fan support beam 13 is fixed to the epidermis with a rivet 14; a 5W bulb 8 is built-in at the upper part of the dummy calf 7, and a double-layer aluminum foil lampshade 9 is placed outside the 5W bulb 8 to enhance radiation heat dissipation; a 15W bulb 16 is built-in at the lower part of the dummy calf 7, and is inverted. The internal space of the dummy leg is small. In order to ensure that the heat radiation of the bulb can evenly reach every part of the leg, the two heat source bulbs in the leg need to be inverted, so that the surface temperature of the dummy is evenly distributed, and a double-layer aluminum foil lampshade 9 is placed outside the 15W bulb 16 to enhance radiation heat dissipation. The principle is the same as that of the built-in fan and bulb in the chest. The 5W bulb 8 and the 15W bulb 16 are both provided with corresponding bulb support beams 10, which are fixed to the epidermis of the dummy calf 7 with rivets 14. A single row of small holes 17 are opened at four locations, namely, the dummy thigh 5, the dummy knee 6 and the upper and lower parts of the dummy calf 7 of the dummy leg 3, for heat exchange and mass exchange between the air inside and outside the dummy when there is no wind in the external environment.

[0060] In summary, the internal heating system of the present invention has a total of one 40W bulb 15, two 15W bulbs 16 and three 5W bulbs.

[0061] The above convection process and radiation process both make the surface of the heating manikin get heat. The heat obtained by the heating manikin from the light bulb is balanced with the heat dissipated by natural convection and radiation heat exchange with the external air, so as to ensure that the manikin surface maintains a constant temperature of 33°C. Furthermore, when the external wind speed is not high and the intensity of natural convection heat exchange with the external air is not large, in order to ensure that the manikin does not overheat, small holes 17 are opened on the manikin chest 2 and the manikin leg 3 respectively; because the built-in heat source heat dissipation of the manikin chest 2 and the manikin leg 3 is different in size, and the heat exchange area with the outside is different, different convection heat exchange amounts are required to ensure the overall temperature of the manikin is constant; the present invention provides different convection heat exchange amounts for the manikin chest 2 and the manikin leg 3 by using different numbers of small holes 17.

[0062] The use scenarios of the heated manikin of the present invention are divided into two states: windless and windy. A windless environment means that the human body cannot feel the wind blowing through intuitively, and the wind speed is usually below 0.3m / s. When in a windless environment, the top cover 4 on the top of the heated manikin's head is sucked out with a wash dish before use, and all the small holes 17 on the manikin's chest 2 and leg 3 are ensured to be in an open state, and then the light bulb and the power supply of the fan 12 are plugged in. After preheating for half an hour, the relevant experiments on airflow organization and thermal comfort can be simulated for real people. It is worth noting that during use, it must be ensured that the small holes 17 on the top cover 4, the left and right back sides of the manikin's chest 2, the manikin's thigh 5, the manikin's knee 6 and the manikin's calf 7 are all kept in an open state. Due to the positive pressure caused by the fan 12 inside the manikin, the internal hot air and the external cold air are exchanged in heat and mass.

[0063] A windy environment means that the human body can intuitively feel the wind blowing, and the wind speed is usually above 0.3m / s. When in a windy environment, the top cover 4 on the head of the warm-body manikin is sucked out with a wash dish before use, and only the small hole 17 at the bottom of the manikin's calf 7 is opened, and at the same time, the small holes 17 located on the back, left and right sides of the manikin's chest 2, the periphery of the manikin's thigh 5, the periphery of the manikin's knee 6, and the upper part of the manikin's calf 7 are sealed with aluminum foil tape. Then plug in the power supply of the light bulb and the fan, and after preheating for half an hour, you can simulate a real person to do experiments related to airflow organization and thermal comfort. It is worth noting that during use, the top cover 4 and the small holes 17 at the bottom of the manikin's calf 7 must be in an open state. In addition, the back, left and right sides of the manikin's chest 2, the periphery of the manikin's thigh 5, the periphery of the manikin's knee 6, and the upper part of the manikin's calf 7 must all be closed.

[0064] In addition, if Figure 7 As shown, the wind pressure caused by the built-in fan 12 of the present invention is upward, so that the hot air inside the dummy flows from bottom to top, carrying heat through the entire dummy and finally through the top of the head to be discharged from the inside of the dummy, and causing air flow with a constant wind speed over the dummy's head. The above mechanism ensures that the warm-body dummy maintains a constant temperature and uniform temperature distribution, so that the thermal plume generated when the human body is in a sitting state can be accurately simulated. The airflow velocity of the hot air flow generated on the top of the warm-body dummy's head is measured to be 0.2m / s, which is equal to that generated when the human body is sitting still. Moreover, the results obtained by simulating the airflow organization around the present invention by CFD are consistent with those obtained by simulating the airflow organization around the human body by CFD, and no matter in a windy or windless environment, the warm-body dummy of the present invention can achieve the functions of constant power 95W and constant surface body temperature 33±max1.5℃.

Claims

1. A method for using a self-balancing warm manikin, characterized in that: The self-balancing heating manikin comprises a heating manikin body with a hollow interior, and an internal heating system and an air dynamic system arranged in the heating manikin body. The heating manikin body is in a sitting position. The heating manikin body comprises a manikin head (1), a manikin chest (2) and a manikin leg (3). Small holes (17) are provided on the manikin chest (2) and the manikin leg (3). The internal heating system is used to simulate human fever, and the air dynamic system is used to achieve air flow with a constant wind speed at the head of the heating manikin body. The back, left and right sides of the dummy chest (2) are each provided with two rows of small holes (17), and the dummy legs (3) are provided with a single row of the small holes (17), wherein the small holes (17) are used for heat exchange and mass exchange between the air inside and outside the dummy; The dummy head (1) comprises a fixed head and a detachable head cover (4); a 5W light bulb (8) is arranged in the fixed head; the light bulb is placed on a light bulb support beam (10); the light bulb support beam (10) is fixedly connected to the dummy head (1) via rivets (14); a double-layer aluminum foil lampshade (9) is arranged outside the light bulb; the double-layer aluminum foil lampshade (9) is used to enhance radiation heat dissipation; When the self-balancing thermal manikin is used: When the heated manikin is in a windless environment, the top cover (4) of the heated manikin's head (1) is sucked out with a washing dish before use, and all the small holes (17) of the manikin's chest (2) and legs (3) are ensured to be in an open state. Then, the internal heating system and the air power system are started. After preheating for half an hour, relevant experiments on airflow organization and thermal comfort are started to simulate a real person. When the heated manikin is in a windy environment, the top cover (4) of the heated manikin's head (1) is sucked out with a washing dish before use, the small hole (17) at the bottom of the manikin's calf (7) is opened, and the small holes (17) at the top of the manikin's chest (2) and the manikin's thigh (5), knee (6), and calf (7) are sealed at the same time, and then the internal heating system and the air power system are started. After preheating for half an hour, the relevant experiments on airflow organization and thermal comfort simulating a real person are started.

2. The method for using a self-balancing warm manikin according to claim 1, characterized in that: The internal heating system comprises a plurality of light bulbs, which are respectively arranged in the dummy head (1), the dummy chest (2) and the dummy legs (3).

3. The method for using a self-balancing warm manikin according to claim 1, characterized in that: The aerodynamic system comprises a plurality of fans (12), wherein the fans (12) are respectively arranged in the dummy head (1), the dummy chest (2) and the dummy legs (3), and the wind direction of the fans (12) is upward.

4. The method for using a self-balancing warm manikin according to claim 1, characterized in that: The dummy head (1), dummy chest (2) and dummy legs (3) are connected via flanges (11) to form a warm-body dummy body; the surface of the warm-body dummy body is made of sheet metal; rubber-plastic thermal insulation cotton is arranged on the inner side of the surface; and two layers of rubber-plastic thermal insulation cotton are arranged on the dummy shoulders.

5. The method for using a self-balancing warm manikin according to claim 1, characterized in that: A flange (11) is provided at the top of the dummy chest body (2), and the flange (11) is used to connect the dummy chest body (2) and the dummy head (1); a fan (12) is built into the upper half of the dummy chest body (2), and the fan (12) is placed on a fan support beam (13), and the fan support beam (13) and the dummy chest body (2) are fixedly connected by rivets (14); two flanges (11) of equal size are built into the lower half of the dummy chest body (2), and the flanges (11) are symmetrically arranged, and the flanges (11) are used to connect the dummy legs (3); a 40W light bulb (15) is arranged between the two flanges (11), and the 40W light bulb (15) is placed on a light bulb support beam (10), and the light bulb support beam (10) and the dummy chest body (2) are fixedly connected by rivets (14).

6. The method for using a self-balancing warm manikin according to claim 1, characterized in that: The dummy legs (3) are two in total, each of the dummy legs (3) comprising a dummy thigh (5), a dummy knee (6) and a dummy calf (7), each of the dummy thighs (5) being provided with a fan (12), the fan (12) being placed on a fan support beam (13), the fan support beam (13) and the dummy thigh (5) being fixedly connected via rivets (14); a 5W light bulb (8) being built into the upper section of the dummy calf (7), a 15W light bulb (16) being built into the lower section of the dummy calf (7), the 15W light bulb (16) being arranged inverted, the 5W light bulb (8) and the 15W light bulb (16) being provided with corresponding light bulb support beams (10), the light bulb support beams (10) being fixedly connected to the dummy calf (7) via rivets (14); and a double-layer aluminum foil lampshade (9) being provided outside the light bulbs.

7. The method for using a self-balancing warm manikin according to claim 1, characterized in that: When the dummy is used in a windless environment, the top cover (4) of the dummy's head (1), the small holes (17) on the dummy's chest (2) and the dummy's legs (3) must all remain in an open state during use; when the dummy is used in a windy environment, the top cover (4) and the small holes (17) at the bottom of the dummy's calves (7) must be in an open state, and the small holes (17) on the upper part of the dummy's thighs (5), the dummy's knees (6) and the dummy's legs (7) must be in a closed state.

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