CN117251940A - Seat thermal comfort evaluation method, device, equipment and medium - Google Patents
Seat thermal comfort evaluation method, device, equipment and medium Download PDFInfo
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- CN117251940A CN117251940A CN202311514425.XA CN202311514425A CN117251940A CN 117251940 A CN117251940 A CN 117251940A CN 202311514425 A CN202311514425 A CN 202311514425A CN 117251940 A CN117251940 A CN 117251940A
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- 238000011156 evaluation Methods 0.000 title claims abstract description 33
- 230000035807 sensation Effects 0.000 claims abstract description 19
- 238000013210 evaluation model Methods 0.000 claims abstract description 9
- 238000002474 experimental method Methods 0.000 claims abstract description 7
- 230000005855 radiation Effects 0.000 claims description 50
- 238000012546 transfer Methods 0.000 claims description 18
- 238000004364 calculation method Methods 0.000 claims description 17
- 238000004590 computer program Methods 0.000 claims description 17
- 210000004197 pelvis Anatomy 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 11
- 230000007935 neutral effect Effects 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 10
- 210000000689 upper leg Anatomy 0.000 claims description 8
- 230000004907 flux Effects 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 238000009423 ventilation Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 210000003049 pelvic bone Anatomy 0.000 description 6
- 238000004378 air conditioning Methods 0.000 description 5
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- 230000007246 mechanism Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/001—Testing of furniture, e.g. seats or mattresses
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/08—Thermal analysis or thermal optimisation
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Abstract
The invention relates to a seat thermal comfort evaluation method, a device, equipment and a medium, wherein the evaluation method comprises the following steps: based on sensors at different positions on the dummy, acquiring parameters of the dummy when the dummy is placed on a seat to be tested to perform a thermal comfort evaluation experiment; respectively calculating the heat exchange quantity between each part of the dummy and the surface of the seat to be tested according to the measured parameters; substituting the heat exchange amount into a thermal comfort evaluation model, and predicting local thermal sensation/thermal comfort and overall thermal sensation/thermal comfort of a part contacted with the seat to be tested. The invention can accurately evaluate the heat exchange quantity of the contact area between the human body part and the seat, thereby accurately evaluating the thermal comfort of the seat in the application scenes such as heating, refrigerating and ventilation of the seat.
Description
Technical Field
The invention relates to the technical field of thermal comfort evaluation, in particular to a seat thermal comfort evaluation method, a seat thermal comfort evaluation device, a seat thermal comfort evaluation equipment and a seat thermal comfort evaluation medium.
Background
In view of the situation that the pure electric new energy automobile is seriously shrunk in the continuous voyage under the low-temperature environment in winter, a host factory inputs a great deal of energy on the whole automobile thermal management and whole automobile energy flow, and 'open source throttling' is carried out to the continuous voyage of each degree of electric energy, so that the continuous voyage performance of the automobile in winter is improved.
The air conditioning system is a second consumer with large energy consumption except the power system of the new energy electric vehicle, and also becomes an important target of energy conservation and consumption reduction. In winter vehicle environment, through contact heat transfer, such as seat heating, steering wheel heating and other local heating modes, the overall heat sensation/thermal comfort sensation of a driver and passengers is improved, so that the power demand of air conditioning heating is reduced, and the winter endurance performance of the electric vehicle can be improved. In the summer vehicle environment, through contact, convection heat transfer, such as modes of seat blowing, seat induced draft, seat refrigeration and the like, the overall heat sensation/thermal comfort feeling of a driver and passengers is improved, so that the refrigerating power requirement of an air conditioner is reduced, and the summer endurance performance of the electric vehicle is improved.
Based on the above application requirements, accurate assessment of the local climate control measures of the seat becomes critical for the local thermal sensation/comfort and the overall thermal sensation/comfort effect of the human body and the seat contact. The inventor of the present invention found that the main reason for the deviation is that the air-conditioning dummy itself does not have the function of metabolic heating of the human body, so that the measured temperature data has a large difference with the contact condition of the real person and the seat under the condition that the temperature sensors at the back, pelvis and thigh of the air-conditioning dummy are kept in contact with the seat surface, thereby causing difficulty in accurately evaluating the heat exchange amount of the contact region between the human body and the seat.
Disclosure of Invention
The invention aims to solve the technical problem of providing a seat thermal comfort evaluation method, device, equipment and medium, which can accurately evaluate the heat exchange quantity of a contact area between a human body part and a seat, thereby accurately evaluating the seat thermal comfort in application scenes such as seat heating, refrigerating, seat ventilation and the like.
The technical scheme adopted for solving the technical problems is as follows: provided is a seat thermal comfort evaluation method including the steps of:
based on sensors at different positions on the dummy, acquiring air temperature, average radiation temperature, solar shortwave radiation heat exchange heat flux density, surface temperature of the seat to be tested, convection wind speed of a contact area between the dummy and the surface of the seat and convection wind speed of a non-contact area between the dummy and the surface of the seat when the dummy is placed on the seat to be tested for thermal comfort evaluation experiments;
respectively calculating heat exchange quantity between each part of the dummy and the surface of the seat to be detected according to the air temperature, the average radiation temperature, the solar shortwave radiation heat exchange heat flux density, the surface temperature of the seat to be detected, the convection wind speed of the contact area of the dummy and the surface of the seat and the convection wind speed of the non-contact area of the dummy and the surface of the seat;
substituting the heat exchange amount into a thermal comfort evaluation model, and predicting local thermal sensation/thermal comfort and overall thermal sensation/thermal comfort of a part contacted with the seat to be tested.
And when the heat exchange quantity between each part of the dummy and the surface of the seat to be detected is calculated according to the air temperature, the average radiation temperature, the solar shortwave radiation heat exchange heat flow density, the temperature of the surface of the seat to be detected, the convection wind speed of the contact area between the dummy and the surface of the seat and the convection wind speed of the non-contact area between the dummy and the surface of the seat, dividing the thighs and pelvis of the dummy into an air exposure area and a seat contact area, and taking the whole back of the dummy as the seat contact area.
The heat exchange quantity between each part of the dummy and the surface of the seat to be tested passesThe calculation results show that, among them,Q part(s) Indicating the heat exchange quantity between a certain part of the dummy and the surface of the seat to be tested,Q exposed area Indicating the heat exchange amount of the air-exposed area of a certain part of the dummy,Q contact area The heat exchange amount of the seat contact area of a certain part of the dummy is shown.
Heat exchange amount of air exposure area of certain part of the dummyQ Exposed area By passing throughThe calculation results show that, among them,Q cv the convective heat transfer amount is expressed as: />；Q r Heat exchange for long wave radiation is expressed as:；Q solar the heat exchange amount of solar short wave radiation is expressed as: />；h c The convective heat transfer coefficient for an environment is expressed as: />，v Non-contact For the convective wind velocity in the non-contact area of the dummy and the seating surface,T clo for the surface temperature of the garment,t a the temperature of the air is set to be the air temperature,A Du is the skin surface area of the dummy segment,f cl the clothing area coefficient of a certain part of the dummy;h r is the radiation heat exchange coefficient of the clothing surface and the environment,t mrt in order to achieve an average radiation temperature,q solar the heat flow density of the solar shortwave radiation heat exchange is,r ADu as the ratio of the radiating surface area of the dummy segment to the skin surface area of the dummy segment,a skin is the solar radiation absorption coefficient of the skin of the dummy.
Heat exchange amount of seat contact area of certain part of dummyQ Contact area By passing throughThe calculation results show that, among them,Q cv the convective heat transfer amount is expressed as: />；Q r Heat exchange for long wave radiation is expressed as:；Q cd for conduction heat exchange, expressed as: />；h c The convective heat transfer coefficient for an environment is expressed as: />，v Contact with As a convection wind velocity in the contact area of the dummy with the seat surface,T clo for the surface temperature of the garment,t a the temperature of the air is set to be the air temperature,A Du is the skin surface area of the dummy segment,f cl the clothing area coefficient of a certain part of the dummy;h r is the radiation heat exchange coefficient of the clothing surface and the environment,t mrt is the average radiation temperature;Kthe comprehensive heat conductivity coefficient of the garment heat resistance and the seat equivalent heat resistance of a certain part of the dummy is considered;A contact with The contact area between a certain part of the dummy and the seat to be tested is fixedTIs the difference between the neutral skin temperature of a certain part of the dummy and the surface temperature of the seat to be tested.
The comprehensive heat conductivity coefficient considering the garment heat resistance and the seat equivalent heat resistance of a certain part of the dummyKAnd measuring and calculating the thermal resistance between the contact surface of the dummy and the automobile seat under different seasons and different clothes combinations through a sitting posture clothing thermal resistance test of the dummy.
The neutral skin temperature of a certain part of the dummy is the skin temperature measured under a neutral stable environment by a subjective test person wearing clothes in a corresponding season through a typical winter and summer test.
The technical scheme adopted for solving the technical problems is as follows: provided is a seat thermal comfort evaluation device including:
the acquisition module is used for acquiring the air temperature, the average radiation temperature, the solar shortwave radiation heat exchange heat flow density, the surface temperature of the seat to be tested, the convection wind speed of the contact area between the dummy and the surface of the seat and the convection wind speed of the non-contact area between the dummy and the surface of the seat when the dummy is placed on the seat to be tested for a thermal comfort evaluation experiment based on the sensors at different positions of the dummy;
the calculation module is used for calculating the heat exchange quantity between each part of the dummy and the surface of the seat to be measured according to the air temperature, the average radiation temperature, the solar shortwave radiation heat exchange heat flow density, the surface temperature of the seat to be measured, the convection wind speed of the contact area between the dummy and the surface of the seat and the convection wind speed of the non-contact area between the dummy and the surface of the seat;
and the prediction module is used for substituting the heat exchange amount into a thermal comfort evaluation model to predict local thermal sensation/thermal comfort and overall thermal sensation/thermal comfort of the contact part of the seat to be tested.
The technical scheme adopted for solving the technical problems is as follows: there is provided an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the above-described seat thermal comfort evaluation method when executing the computer program.
The technical scheme adopted for solving the technical problems is as follows: there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the above-described seat thermal comfort evaluation method.
The beneficial effects are that:
due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects: according to the invention, the thighs and pelvis of a human body are divided into an air exposure area and a seat contact area, the back is simplified into a full contact area, and the heat exchange quantity between each part and the surface of the seat under different heat transfer mechanisms is calculated respectively, so that the heat exchange quantity between the human body part and the seat contact area is accurately estimated, and after the heat exchange quantity between each part and the surface of the seat is completed, the heat exchange quantity is input into a thermal comfort evaluation model, so that the thermal comfort evaluation of the seat under application scenes such as heating, refrigerating and ventilation of the seat is realized.
Drawings
Fig. 1 is a flowchart of a seat thermal comfort evaluation method according to a first embodiment of the present invention.
Detailed Description
The invention will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present invention, and such equivalents are intended to fall within the scope of the claims appended hereto.
A first embodiment of the present invention relates to a seat thermal comfort evaluation method, as shown in fig. 1, including the steps of:
step 1, based on sensors at different positions on a dummy, acquiring air temperature, average radiation temperature, solar shortwave radiation heat exchange heat flow density, surface temperature of the seat to be tested, convection wind speed of a contact area between the dummy and the surface of the seat and convection wind speed of a non-contact area between the dummy and the surface of the seat when the dummy is placed on the seat to be tested for a thermal comfort evaluation experiment; the temperature sensor used in the sensor may be a patch thermocouple sensor.
And 2, respectively calculating the heat exchange quantity between each part of the dummy and the surface of the seat to be detected according to the air temperature, the average radiation temperature, the solar shortwave radiation heat exchange heat flow density, the surface temperature of the seat to be detected, the convection wind speed of the contact area of the dummy and the surface of the seat and the convection wind speed of the non-contact area of the dummy and the surface of the seat.
Because a complicated heat exchange process exists among thighs, backs, pelvis and seats to be tested, based on the seat thermal comfort test evaluation of an air-conditioning dummy, the thighs and the pelvis can be divided into an air exposure area and a seat contact area, the backs are simplified into full contact areas, and the heat exchange quantity between each part and the surfaces of the seats to be tested under three heat transfer mechanisms of convection, radiation and conduction is calculated respectively, so that the accurate calculation of the heat exchange quantity is realized.
Taking pelvis as an example, partitioning the contact area between the pelvis and the seat and the air exposure area, calculating the heat exchange quantity of the two areas, and obtaining the heat exchange quantity between the pelvis and the surface of the seat to be tested in a summation modeQ Pelvis The calculation formula is as follows:。
wherein the heat exchange amount of the pelvis exposure areaQ Pelvis exposed area By passing throughCalculating to obtain; heat exchange capacity of pelvic contact areaQ Pelvic contact area By->And (5) calculating to obtain the product.
The amount of heat exchange in the exposed pelvic region includes convective heat exchangeQ cv Heat exchange capacity by long wave radiationQ r Heat exchange capacity of solar shortwave radiationQ solar These heat exchanges can be obtained by measuring the air temperature in step 1t a Average radiation temperaturet mrt Convection wind speedv Non-contact ，Garment surface temperatureT clo Skin surface area of dummy segmentA Du Clothing area coefficient of pelvis partf cl Radiation heat exchange coefficient of clothing surface and environmenth r Ratio of the radiated surface area to the skin surface area of the dummy segmentr ADu Solar radiation absorption coefficient of skin of dummya skin The calculation formula is as follows:、and->Wherein, the method comprises the steps of, wherein,h c the convective heat transfer coefficient for an environment is expressed as: />。
The amount of heat exchange at the pelvic contact area includes the amount of conduction heat exchangeQ cd Convection heat transferQ cv Heat exchange capacity by long wave radiationQ r . Wherein, convection heat exchange quantityQ cv Heat exchange capacity by long wave radiationQ r Is calculated in a manner consistent with the above-described pelvic exposed region, except that the amount of convective heat transfer is calculatedQ cv When adopting convection wind speedv Contact with And (5) performing calculation. Heat transfer by conductionQ cd The calculation of (1) requires the use of the measured seat surface temperature measured by the dummy in step 1T seat And the neutral skin temperature of the pelvic bone part, and the comprehensive heat conductivity coefficient considering the clothing heat resistance and the seat equivalent heat resistance of the dummy pelvic bone partK、Contact area of dummy pelvis area and seat to be testedA Contact with . Heat transfer by conductionQ cd The calculation formula of (2) is as follows:wherein, is a deltaTIs the neutral skin temperature of a certain part of the dummy and the surface temperature of the seat to be testedT seat And (3) a difference.
The neutral skin temperature of the pelvic bone part is measured by a subjective test person wearing clothes in a corresponding season through a typical winter and summer test under a neutral stable environment. Comprehensive heat conductivity coefficient considering garment heat resistance and seat equivalent heat resistance of dummy pelvic bone partKAnd measuring and calculating the thermal resistance between the contact surface of the dummy and the automobile seat under different seasons and different clothes combinations through a sitting posture clothing thermal resistance test of the dummy. Contact area of dummy pelvis area and seat to be testedA Contact with The setting can be performed by literature or related regulations of GB/T10000 standard.
The calculation of the thigh part is the same as that of the pelvic bone part, and the description is omitted here; since the present embodiment simplifies the back to the full contact area for the calculation of the back portion, only the heat exchange amount of the back contact area needs to be calculated in the same manner as the heat exchange amount of the pelvic bone portion contact area.
And 3, substituting the heat exchange amount into a thermal comfort evaluation model, and predicting local thermal sensation/thermal comfort and overall thermal sensation/thermal comfort of the contact part of the seat to be tested.
It is easy to find that the invention divides the thighs and pelvis of a human body into an air exposure area and a seat contact area, simplifies the back into a full contact area, and calculates the heat exchange amount between each part and the surface of the seat under different heat transfer mechanisms, so as to accurately evaluate the heat exchange amount between the human body part and the seat contact area, and then inputs the heat exchange amount between each part and the surface of the seat into a thermal comfort evaluation model after the heat exchange amount is completed, thereby realizing the evaluation of the thermal comfort of the seat in application scenes such as heating, refrigerating, ventilation of the seat and the like.
A second embodiment of the present invention relates to a seat thermal comfort evaluation device including:
the acquisition module is used for acquiring the air temperature, the average radiation temperature, the solar shortwave radiation heat exchange heat flow density, the surface temperature of the seat to be tested, the convection wind speed of the contact area between the dummy and the surface of the seat and the convection wind speed of the non-contact area between the dummy and the surface of the seat when the dummy is placed on the seat to be tested for a thermal comfort evaluation experiment based on the sensors at different positions of the dummy;
the calculation module is used for calculating the heat exchange quantity between each part of the dummy and the surface of the seat to be measured according to the air temperature, the average radiation temperature, the solar shortwave radiation heat exchange heat flow density, the surface temperature of the seat to be measured, the convection wind speed of the contact area between the dummy and the surface of the seat and the convection wind speed of the non-contact area between the dummy and the surface of the seat;
and the prediction module is used for substituting the heat exchange amount into a thermal comfort evaluation model to predict local thermal sensation/thermal comfort and overall thermal sensation/thermal comfort of the contact part of the seat to be tested.
It can be understood that the first embodiment and the second embodiment correspond to each other, and specific details thereof may be referred to each other and will not be described herein.
A third embodiment of the present invention is directed to an electronic device including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the seat thermal comfort evaluation method of the first embodiment when executing the computer program.
A fourth embodiment of the present invention relates to a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the seat thermal comfort evaluation method of the first embodiment.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A seat thermal comfort evaluation method, characterized by comprising the steps of:
based on sensors at different positions on the dummy, acquiring air temperature, average radiation temperature, solar shortwave radiation heat exchange heat flux density, surface temperature of the seat to be tested, convection wind speed of a contact area between the dummy and the surface of the seat and convection wind speed of a non-contact area between the dummy and the surface of the seat when the dummy is placed on the seat to be tested for thermal comfort evaluation experiments;
respectively calculating heat exchange quantity between each part of the dummy and the surface of the seat to be detected according to the air temperature, the average radiation temperature, the solar shortwave radiation heat exchange heat flux density, the surface temperature of the seat to be detected, the convection wind speed of the contact area of the dummy and the surface of the seat and the convection wind speed of the non-contact area of the dummy and the surface of the seat;
substituting the heat exchange amount into a thermal comfort evaluation model, and predicting local thermal sensation/thermal comfort and overall thermal sensation/thermal comfort of a part contacted with the seat to be tested.
2. The method according to claim 1, wherein the heat exchanging amount between each part of the dummy and the surface of the seat to be measured is calculated based on the air temperature, the average radiation temperature, the heat exchanging heat flux density of solar shortwave radiation, the surface temperature of the seat to be measured, the convection wind speed of the contact area between the dummy and the surface of the seat, and the convection wind speed of the non-contact area between the dummy and the surface of the seat, respectively, and the thighs and pelvis of the dummy are divided into an air exposure area and a seat contact area, and the back of the dummy is used as the seat contact area.
3. The method for evaluating thermal comfort of a seat according to claim 2, wherein the amount of heat exchange between each part of the dummy and the surface of the seat to be tested is byThe calculation results show that, among them,Q part(s) Indicating the heat exchange quantity between a certain part of the dummy and the surface of the seat to be tested,Q exposed area Indicating the heat exchange amount of the air-exposed area of a certain part of the dummy,Q contact area The heat exchange amount of the seat contact area of a certain part of the dummy is shown.
4. The method for evaluating thermal comfort of a seat according to claim 3, wherein an air-exposed area of a certain portion of said dummy has a heat exchange amountQ Exposed area By passing throughThe calculation results show that, among them,Q cv the convective heat transfer amount is expressed as: />；Q r Heat exchange for long wave radiation is expressed as: />；Q solar The heat exchange amount of solar short wave radiation is expressed as: />；h c The convective heat transfer coefficient for an environment is expressed as: />，v Non-contact For the convective wind velocity in the non-contact area of the dummy and the seating surface,T clo for the surface temperature of the garment,t a the temperature of the air is set to be the air temperature,A Du is the skin surface area of the dummy segment,f cl the clothing area coefficient of a certain part of the dummy;h r is the radiation heat exchange coefficient of the clothing surface and the environment,t mrt in order to achieve an average radiation temperature,q solar for solar short wave radiationThe heat flux density of the heat radiation and exchange,r ADu as the ratio of the radiating surface area of the dummy segment to the skin surface area of the dummy segment,a skin is the solar radiation absorption coefficient of the skin of the dummy.
5. The method for evaluating thermal comfort of a seat according to claim 3, wherein the heat exchange amount of the seat contact area of a certain portion of the dummyQ Contact area By passing throughThe calculation results show that, among them,Q cv the convective heat transfer amount is expressed as: />；Q r Heat exchange for long wave radiation is expressed as: />；Q cd For conduction heat exchange, expressed as: />；h c The convective heat transfer coefficient for an environment is expressed as: />，v Contact with As a convection wind velocity in the contact area of the dummy with the seat surface,T clo for the surface temperature of the garment,t a the temperature of the air is set to be the air temperature,A Du is the skin surface area of the dummy segment,f cl the clothing area coefficient of a certain part of the dummy;h r is the radiation heat exchange coefficient of the clothing surface and the environment,t mrt is the average radiation temperature;Kthe comprehensive heat conductivity coefficient of the garment heat resistance and the seat equivalent heat resistance of a certain part of the dummy is considered;A contact with Is the contact area between a certain part of the dummy and the seat to be tested,△Tis the difference between the neutral skin temperature of a certain part of the dummy and the surface temperature of the seat to be tested.
6. The method for evaluating thermal comfort of a seat according to claim 5, wherein the thermal conductivity of the garment and the thermal conductivity of the seat equivalent are integrated in consideration of a thermal resistance of a part of a dummyKAnd measuring and calculating the thermal resistance between the contact surface of the dummy and the automobile seat under different seasons and different clothes combinations through a sitting posture clothing thermal resistance test of the dummy.
7. The method for evaluating thermal comfort of a seat according to claim 5, wherein the neutral skin temperature of a certain portion of the dummy is a skin temperature measured in a neutral stable environment by a subjective test person wearing a garment of a corresponding season through a typical winter-summer test.
8. A seat thermal comfort evaluation device, characterized by comprising:
the acquisition module is used for acquiring the air temperature, the average radiation temperature, the solar shortwave radiation heat exchange heat flow density, the surface temperature of the seat to be tested, the convection wind speed of the contact area between the dummy and the surface of the seat and the convection wind speed of the non-contact area between the dummy and the surface of the seat when the dummy is placed on the seat to be tested for a thermal comfort evaluation experiment based on the sensors at different positions of the dummy;
the calculation module is used for calculating the heat exchange quantity between each part of the dummy and the surface of the seat to be measured according to the air temperature, the average radiation temperature, the solar shortwave radiation heat exchange heat flow density, the surface temperature of the seat to be measured, the convection wind speed of the contact area between the dummy and the surface of the seat and the convection wind speed of the non-contact area between the dummy and the surface of the seat;
and the prediction module is used for substituting the heat exchange amount into a thermal comfort evaluation model to predict local thermal sensation/thermal comfort and overall thermal sensation/thermal comfort of the contact part of the seat to be tested.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the seat thermal comfort evaluation method according to any one of claims 1-7 when the computer program is executed.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, carries out the steps of the seat thermal comfort evaluation method according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311514425.XA CN117251940B (en) | 2023-11-15 | 2023-11-15 | Seat thermal comfort evaluation method, device, equipment and medium |
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| CN202311514425.XA CN117251940B (en) | 2023-11-15 | 2023-11-15 | Seat thermal comfort evaluation method, device, equipment and medium |
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| CN117251940A true CN117251940A (en) | 2023-12-19 |
| CN117251940B CN117251940B (en) | 2024-02-02 |
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Citations (7)
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