CN112198084A - Waterproof breathable film determination method and electronic equipment - Google Patents
Waterproof breathable film determination method and electronic equipment Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 53
- 230000035699 permeability Effects 0.000 claims abstract description 145
- 230000008859 change Effects 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 3
- 238000009423 ventilation Methods 0.000 claims description 42
- 239000012528 membrane Substances 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000012827 research and development Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
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- 241000190070 Sarracenia purpurea Species 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 125000000174 L-prolyl group Chemical group [H]N1C([H])([H])C([H])([H])C([H])([H])[C@@]1([H])C(*)=O 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The embodiment of the invention provides a method for determining a waterproof breathable film and electronic equipment, wherein the method comprises the following steps: obtaining a first parameter indicative of a volume of the first container, determining a first gas transmission capacity of the first container based on the first parameter; the first container is provided with air holes, and the first air permeability is the air permeability which needs to be ventilated through the air holes in order to keep the air pressure in the first container within a preset range in the temperature change process of the air in the first container; determining air permeability conditions for selecting a waterproof breathable film based at least on the first air permeability; under the condition that the second air permeability of the waterproof air-permeable film meets the air permeability condition, determining the corresponding waterproof air-permeable film as a target waterproof air-permeable film for sealing the air holes; and the second air permeability is the air permeability of the waterproof breathable film in unit area under the preset air pressure in unit time. The method can quickly and accurately match a target waterproof breathable film suitable for sealing the vent of the first container.
Description
Technical Field
The embodiment of the invention relates to the technical field of household appliances, in particular to a method for determining a waterproof breathable film and electronic equipment.
Background
For the convenience of portable heating kettle or thermos cup etc. container carry to and the realization of functions such as leak protection and avoiding scalding, set up the venthole on this type of container, and set up waterproof ventilated membrane as a development trend of this type of container in venthole department.
If the Chinese utility model with the publication number of CN203424706U discloses a water cup, the water cup comprises a cup body and a cover body which are spliced, sealing rubber is arranged at the joint of the cup body and the cup cover, air inlet cylinders are respectively arranged at the left side and the right side of the cup body, an air inlet is arranged at the bottom of the outer side of each air inlet cylinder, an air inlet pipe extending into the inner cavity of the cup body is arranged at the upper part of the inner side of each air inlet cylinder, and the upper port of each air inlet pipe is arranged at the top of the inner cavity of the cup body; an exhaust port is arranged at the bottom of the outer side of the exhaust funnel, an exhaust pipe extending into the inner cavity of the cup body is arranged at the upper part of the inner side of the exhaust funnel, an upper port of the exhaust pipe is arranged at the top of the inner cavity of the cup body, and waterproof breathable films are respectively arranged at the upper ports of the air inlet pipe and the exhaust pipe.
When the waterproof breathable film is applied in the prior art, more accurate data cannot be provided for the breathable hole and the breathable film in the early stage of research and development as a research and development basis; the waterproof breathable film with the characteristics and parameters close to those of the matched product can be found only by selecting breathable films with different specifications for testing, and repeatedly modifying the number and the structure through a net casting mode at the later stage of product forming. The disadvantages of this are mainly: the development period of the product is prolonged; secondly, the quantity of testing engineering of the product is increased, and the extra expenditure of research and development cost is increased; the repeated change of the opening structure increases the cost investment of the die and changes the die frequently to shorten the service cycle of the die.
Disclosure of Invention
In view of the above-mentioned problems in the prior art, embodiments of the present invention provide a waterproof breathable film determination method and an electronic device, which can quickly and accurately match a target waterproof breathable film suitable for sealing a vent hole of a first container.
In order to solve the above problems, the embodiment of the present invention provides the following technical solutions:
a method for determining a waterproof breathable film, comprising:
obtaining a first parameter indicative of a volume of a first container, determining a first gas transmission capacity of the first container based on the first parameter; the first container is provided with an air vent, and the first air permeability is the air permeability which needs to be ventilated through the air vent in order to keep the air pressure in the first container within a preset range in the temperature change process of the air in the first container;
determining air permeability conditions for selecting the waterproof breathable film based at least on the first air permeability;
under the condition that the second air permeability of the waterproof air-permeable film meets the air permeability condition, determining the corresponding waterproof air-permeable film as a target waterproof air-permeable film for sealing the air holes; wherein the second air permeability is the air permeability of the waterproof breathable film per unit area per unit time under a preset air pressure.
The method for determining the waterproof breathable film can quickly and accurately match the target waterproof breathable film suitable for the air hole of the sealed first container, and is beneficial to shortening the research and development period and research and development cost of products.
In some embodiments, the method further comprises:
determining a first pressure difference of the first container based on the first parameter, wherein the first pressure difference is the pressure difference between the inside and the outside of the first container after the temperature of the gas in the first container changes under the condition that the first container is sealed and the pressure inside and the pressure outside the first container is equal in the initial state;
accordingly, the determining air permeability conditions for selecting the waterproof breathable film based at least on the first air permeability comprises:
determining the air permeability condition based on the first air permeability amount and the first differential pressure value.
By the method, the internal and external pressure difference of the first container after the gas temperature changes, namely, the pressure difference at two sides of the waterproof breathable film can be accurately determined, so that the ventilation quantity condition can be accurately determined, and the method is beneficial to further improving the matching degree of the selected target waterproof breathable film.
In some embodiments, said determining the corresponding waterproof breathable film as the target waterproof breathable film for sealing the breathable aperture in case the second breathable amount of the waterproof breathable film meets the breathable amount condition comprises:
and under the condition that the second air permeability of the waterproof air-permeable membrane meets the air permeability condition and the water pressure resistance value of the waterproof air-permeable membrane is greater than the first pressure difference, determining the corresponding waterproof air-permeable membrane as a target waterproof air-permeable membrane for sealing the air holes.
The water pressure resistance value of the waterproof breathable film represents the waterproof performance of the waterproof breathable film, and the water pressure resistance value of the waterproof breathable film is configured to be larger than a first pressure difference, so that the waterproof breathable film is enabled to be breathable and water-tight.
In some embodiments, the first air permeability amount is determined based on the following formula:
wherein P represents the gas pressure in the first container in KPa; t is1Represents the gas temperature in K before the gas temperature in the first container changes; t is2The gas temperature in unit K after the gas temperature in the first container changes is shown; v1The volume before the temperature change of the gas in the first container is shown, namely the volume of the first container, and the unit is ml; v2The volume of the original gas in the first container after the temperature change is expressed as unit ml; t represents the ventilation time in min.
In some embodiments, the gas temperature before the gas temperature in the first container is changed is 288K to 303K, and the gas temperature after the gas temperature in the first container is changed is 348K to 373K; or
The gas temperature before the gas temperature in the first container changes is 348K to 373K, and the gas temperature after the gas temperature in the first container changes is 288K to 303K.
In some embodiments, the method further comprises:
determining a cross-sectional area of the vent based on the first vent amount and the second vent amount.
The sectional area of the required air holes can be accurately determined based on the first air permeability and the second air permeability of the target waterproof air-permeable film, and further repeated change of the mold can be avoided.
In some embodiments, the method further comprises:
and acquiring the Green air permeability rate of the waterproof air-permeable membrane, and determining the second air permeability amount based on the Green air permeability rate.
Therefore, the application range of the waterproof breathable film determination method can be expanded, so that the applicable waterproof breathable film can be selected in a wider range.
An electronic device, comprising:
a first obtaining module for obtaining a first parameter characterizing a volume of a first container, determining a first gas permeation quantity of the first container based on the first parameter; the first container is provided with an air vent, and the first air permeability is the air permeability which needs to be ventilated through the air vent in order to keep the air pressure in the first container within a preset range in the temperature change process of the air in the first container;
a first determination module for determining air permeability conditions for selecting the waterproof breathable membrane based at least on the first air permeability;
a second determining module, configured to determine, when a second air permeability of the waterproof breathable film meets the air permeability condition, the corresponding waterproof breathable film as a target waterproof breathable film for sealing the air vent; wherein the second air permeability is the air permeability of the waterproof breathable film per unit area per unit time under a preset air pressure.
In some embodiments, the electronic device further comprises:
a third determining module, configured to determine a first pressure difference of the first container based on the first parameter, where the first pressure difference is an internal and external pressure difference of the first container after a temperature of gas in the first container changes when the first container is sealed and internal and external pressures of the first container are equal in an initial state;
correspondingly, the first determining module is specifically configured to:
determining the air permeability condition based on the first air permeability amount and the first differential pressure value.
In some embodiments, the second determining module is specifically configured to:
and under the condition that the second air permeability of the waterproof air-permeable membrane meets the air permeability condition and the water pressure resistance value of the waterproof air-permeable membrane is greater than the first pressure difference, determining the corresponding waterproof air-permeable membrane as a target waterproof air-permeable membrane for sealing the air holes.
According to the method for determining the waterproof breathable film, the first parameter for representing the volume of the first container is obtained, the first ventilation quantity of the first container is determined based on the first parameter, the ventilation quantity condition is determined according to the first ventilation quantity, and the waterproof breathable film of which the second ventilation quantity meets the ventilation quantity condition is determined as the target breathable film.
Drawings
FIG. 1 is a flow chart of a method for determining a waterproof breathable film according to an embodiment of the present invention;
fig. 2 is a block diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
Various aspects and features of the present application are described herein with reference to the drawings.
It will be understood that various modifications may be made to the embodiments of the present application. Accordingly, the foregoing description should not be construed as limiting, but merely as exemplifications of embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the application.
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with a general description of the application given above and the detailed description of the embodiments given below, serve to explain the principles of the application.
These and other characteristics of the present application will become apparent from the following description of preferred forms of embodiment, given as non-limiting examples, with reference to the attached drawings.
It should also be understood that, although the present application has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of application, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.
The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.
Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the application, which can be embodied in various forms. Well-known and/or repeated functions and constructions are not described in detail to avoid obscuring the application of unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present application in virtually any appropriately detailed structure.
The specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the application.
The embodiment of the invention discloses a method for determining a waterproof breathable film, which is used for determining the waterproof breathable film suitable for sealing a vent hole of a first container. Referring to fig. 1, the method for determining a waterproof breathable film comprises the following steps:
s1, a first parameter indicative of the volume of the first container is obtained, and a first ventilation amount of the first container is determined based on the first parameter.
Wherein the first container may be, for example, a thermos cup, a heated kettle, a heated cup, or the like. In particular implementations, the first parameter of the volume of the first container may be obtained in a variety of ways. For example, in an application scenario, the method for determining a waterproof breathable film may be applied to an electronic device, and the electronic device may acquire the first parameter from another electronic device by communicating or interacting with the other electronic device. In another application scenario, the method for determining the waterproof breathable film can be applied to an application program, and the application program can have a parameter input interface and can acquire a first parameter input by a user on the input interface. In another application scenario, the method for determining a waterproof breathable film is also applied to an application program, and a design drawing of a first container can be loaded into the application program, and the application program can obtain a first parameter by obtaining a design parameter of the first container. In another application scenario, the method for determining the waterproof breathable film can also be applied to a plug-in program, the plug-in program can take design software such as AutoCAD, SolidWorks, Pro/Engineer and the like as an operating platform, and the plug-in program can obtain the first parameter by obtaining the design parameter of the first container design drawing drawn on the design software. Of course, the above-mentioned manner of acquiring the first parameter is exemplary, and does not constitute a specific limitation on the manner of acquiring the first parameter. The first parameter may include the volume of the first container, and the first parameter may also include other parameters of the first container, such as the initial size of the vent, etc.
When the vacuum cup is used, the temperature in the first container changes, for example, when the first container is the vacuum cup, the temperature of hot water stored in the vacuum cup is gradually reduced, and the temperature of air in the vacuum cup is also gradually reduced; for example, when the first container is a heating kettle, the temperature of water and the temperature of gas in the kettle will gradually increase during the heating process. When the temperature in the first container changes, the gas expands with heat and contracts with cold, and when the first container is sealed, the gas pressure in the first container changes; when the first container is provided with the air holes, the volume of the original gas in the first container can be changed under the condition that the air pressure in the first container is kept within a preset range. Therefore, in the process of changing the temperature of the gas in the first container, in order to keep the air pressure in the first container within the preset range, ventilation needs to be performed through the ventilation holes, and the first ventilation amount is the ventilation amount which is needed to perform ventilation through the ventilation holes in order to keep the air pressure in the first container within the preset range in the process of changing the temperature of the gas in the first container.
In particular implementations, when the volume of the first container and the temperature variation range of the gas in the first container are determined, the first permeability amount may be determined based on the volume of the first container and the temperature variation range. The first ventilation amount may be the total ventilation amount (in ml) required during the temperature change of the gas in the first container, or the ventilation amount (in ml/min) per unit time.
S2, determining air permeability conditions for selecting the waterproof breathable film at least based on the first air permeability.
Wherein the air permeability condition is used to determine whether the selected waterproof air permeable membrane is suitable for sealing the air permeable holes of the first container. The air permeability condition may be a range of air permeability per unit time (in ml/min) determined based on total air permeability or air permeability per unit time. For example, when a first container having a volume of 10L is defined, the total gas permeation amount required for decreasing the internal gas temperature from 80 ℃ to 20 ℃ is 1700ml, and the time for the temperature decreasing process is about 12min, the gas permeation amount per unit time is 142 ml/min. Assuming that the temperature change is a uniform process, the pressure difference between the inside and the outside of the waterproof breathable film is usually between 1 and 2 KPa. When the internal and external pressure difference of the waterproof breathable film is 1KPa, the air permeability per unit time is 142ml/min @1KPa under the pressure of 1 KPa. In this case, the air permeability condition may be an air permeability per unit time range within a specific range around 142ml/min @1KPa, for example, (142ml/min @1KPa-X, 142ml/min @1KPa + Y).
The air permeability condition can also be the air permeability range per unit time (unit ml/min/cm) of the waterproof breathable film per unit area determined based on the air permeability per unit time under the preset pressure2@7KPa), of course, the preset pressure is not limited to 7KPa, but may be, for example, 124KPa, or other pressures. Under the condition that the air permeability per unit time is determined, the air permeability per unit time of the waterproof breathable film per unit area under the preset pressure can be determined based on the sectional area of the preset air holes, and then a range is selected as an air permeability condition in the vicinity of the air permeability per unit time of the waterproof breathable film per unit area under the preset pressure.
And S3, under the condition that the second air permeability of the waterproof air permeable film meets the air permeability condition, determining the corresponding waterproof air permeable film as a target waterproof air permeable film for sealing the air holes.
After the air permeability condition is determined, a second air permeability of the initially selected waterproof breathable film can be obtained, wherein the second air permeability is the air permeability of the waterproof breathable film per unit area per unit time under the preset air pressure (unit ml/min/cm)2@7 KPa). In particular implementations, the second amount of air permeability of the waterproof, breathable film can be obtained in a variety of ways. In an application scenario, when the method for determining a waterproof breathable film is applied to an electronic device, the electronic device may obtain the second breathable amount of the waterproof breathable film by communicating or interacting with another electronic device, for example, a design system of a research and development engineer may be interfaced with a supplier system, so that the research and development engineer can obtain the second breathable amount of the waterproof breathable film directly from the supplier system. In another application scenario, the waterproof, breathable film may be applied to an application program, which may have a parameter input interface, where the application program may obtain a second amount of breathable gas for input at the input interface. Obviously, in practical application, the second ventilation amount is not limited to the above manner.
After the second air permeability of the waterproof air-permeable film is obtained, whether the second air permeability meets the air permeability condition can be judged. When the air permeability condition is the air permeability range of the waterproof breathable film in unit area under the preset pressure in unit time (unit ml/min/cm)2@7KPa), it may be directly determined whether the second ventilation amount is within this range. When the air permeability condition is an air permeability range per unit time (unit ml/min), whether the second air permeability meets the air permeability condition may be determined based on the size of the preliminary air permeability holes. When the second air permeability of the waterproof air permeable film is consistent with air permeabilityUnder the condition of quantitative conditions, the corresponding waterproof breathable film can be determined as a target waterproof breathable film, and the target waterproof breathable film is suitable for sealing the air holes of the first container.
According to the method for determining the waterproof breathable film, the first parameter for representing the volume of the first container is obtained, the first ventilation quantity of the first container is determined based on the first parameter, the ventilation quantity condition is determined according to the first ventilation quantity, and the waterproof breathable film of which the second ventilation quantity meets the ventilation quantity condition is determined as the target breathable film.
In some embodiments, the method further comprises:
determining a first pressure difference of the first container based on the first parameter, wherein the first pressure difference is the difference between the inside pressure and the outside pressure of the first container after the temperature of the gas in the first container changes under the condition that the first container is sealed and the inside pressure and the outside pressure of the first container are equal in the initial state;
correspondingly, the determining of the air permeability condition according to the first air permeability comprises:
determining the air permeability condition based on the first air permeability amount and the first differential pressure value.
In specific implementation, when the first container is assumed to be in a sealed state, the volume of the first container before and after the temperature change is unchanged, according to an ideal gas state equation:
P1V＝nRT1
P2V＝nRT2
wherein, P1The air pressure before the temperature change of the air in the first container is expressed in a unit KPa; t is1Represents the gas temperature in K before the gas temperature in the first container changes; p2The air pressure after the temperature of the air in the first container is changed is expressed in a unit KPa; t is2The gas temperature in unit K after the gas temperature in the first container changes is shown; v represents the volume of the first container in cm3(ii) a n represents the amount of the substance of the gas in mol; r represents a proportionality constant in J/(mol.K) and belongs to the thermodynamic constant, with the constant of R being about 8.31441 + -0.00026J/(mol.K) for any desired gas.
From the above formula one can deduce:
assuming that the volume of the first container is 10L, the gas temperature (T1) before the gas temperature in the first container is changed is 353.15K, the gas temperature (T2) after the gas temperature in the first container is changed is 293.15K, and the duration of the temperature reduction process is 12 min; in the initial state, the air pressure in the first container and the air pressure outside the first container are both one atmosphere, namely 101 KPa. Then:
the first pressure difference is 101KPa-83.84 KPa-17.16 KPa
Based on the first pressure difference, a pressure difference value between the inside and the outside of the first container per unit time of 17.16KPa/12min to 1.43KPa/min can be calculated. As mentioned above, when the air permeability per unit time is 142ml/min, the air permeability per unit time is 142ml/min @1.43KPa, which is the air permeability per unit time under a pressure of 1.43 KPa.
By the method, the internal and external pressure difference of the first container after the gas temperature changes, namely, the pressure difference at two sides of the waterproof breathable film can be accurately determined, so that the ventilation quantity condition can be accurately determined, and the method is beneficial to further improving the matching degree of the selected target waterproof breathable film.
In some embodiments, said determining the corresponding waterproof breathable film as the target waterproof breathable film for sealing the breathable aperture in case the second breathable amount of the waterproof breathable film meets the breathable amount condition comprises:
and under the condition that the second air permeability of the waterproof air-permeable membrane meets the air permeability condition and the water pressure resistance value of the waterproof air-permeable membrane is greater than the first pressure difference, determining the corresponding waterproof air-permeable membrane as a target waterproof air-permeable membrane for sealing the air holes.
The water pressure resistance value of the waterproof breathable film represents the waterproof performance of the waterproof breathable film, and is configured to be larger than a first pressure difference, so that the waterproof breathable film is breathable and water-tight.
As previously mentioned, the first ventilation amount may be the total ventilation amount (in ml) required during the temperature change of the gas in the first container, or the ventilation amount (in ml/min) per unit time. When the first ventilation amount is the total ventilation amount (in ml) required during the change in the temperature of the gas in the first container, the first ventilation amount may be determined based on the following formula:
first air permeability ═ V1-V2|
Wherein P represents the gas pressure in the first container in units KPa; t is1Represents the gas temperature in K before the gas temperature in the first container changes; t is2The gas temperature in unit K after the gas temperature in the first container changes is shown; v1The volume before the temperature change of the gas in the first container is shown, namely the volume of the first container, and the unit is ml; v2Represents the volume of the original gas in the first container after a temperature change, in ml.
When the first ventilation amount is the ventilation amount per unit time (ml/min) required during the temperature change of the gas in the first container, the first ventilation amount may be determined based on the following formula:
wherein P represents the gas pressure in the first container in units KPa; t is1Represents the gas temperature in K before the gas temperature in the first container changes; t is2The gas temperature in unit K after the gas temperature in the first container changes is shown; v1The volume before the temperature change of the gas in the first container is shown, namely the volume of the first container, and the unit is ml; v2The volume of the original gas in the first container after the temperature change is expressed as unit ml; t represents the ventilation time in min.
For example, assume the volume (V) of the first container1) 10L, gas temperature (T) before gas temperature change in the first container1) 353.15K, the temperature of the gas (T) in the first container after the temperature change2) 293.15K, the duration (t) of the cooling process is 12min, and the air pressure in the first container and the air pressure outside the first container in the initial state are both one atmosphere, namely 101KPa, then:
the required total air permeability is 10000ml-8300 ml-1700 ml, and the air permeability per unit time is 1700ml/12 min-142 ml/min.
In specific implementation, the temperature change of the gas in the first container may be a temperature rise process or a temperature decrease process. When the temperature of the gas in the first container changes to the temperature rise process, the temperature of the gas in the first container before the temperature rise may be 288K to 303K, and the temperature of the gas in the first container after the temperature rise may be 348K to 373K. When the temperature of the gas in the first container is changed to be in the cooling process, the temperature of the gas in the first container before cooling can be 348K to 373K, and the temperature of the gas in the first container after cooling can be 288K to 303K.
In some embodiments, the method for determining a waterproof breathable film may further comprise: the cross-sectional area of the vent is determined based on the first and second vent amounts. For example, when the first air permeability of the first container is determined to be 142ml/min @1.43KPa, the second air permeability of the target waterproof, breathable membrane is determined to be 1700ml/min/cm2@7KPa, the first ventilationThe air permeability per unit time in the state of 1KPa converted to 99.3ml/min @1KPa, and the air permeability per unit time in the state of 1KPa converted to 242.9ml/min/cm of the second air permeability2@1KPa, it is found that the cross-sectional area of the vent hole of the first container is 0.41cm when the cross-sectional area is more than 99.3/242.92Just can satisfy ventilative demand, also can accurately confirm the sectional area of required bleeder vent based on the ventilative volume of second of first ventilative volume and waterproof ventilated membrane of target, and then can avoid changing the mould repeatedly.
In some embodiments, the waterproof breathable film determination method further comprises: the green permeability rate (Gurley, abbreviation G) of the waterproof breathable film was obtained and the second amount of permeability was determined based on the green permeability rate.
In specific implementation, the second air permeability amount of the waterproof breathable film can be directly obtained in some cases, and the green ventilation rate of the waterproof breathable film can be obtained in other cases, so that the second air permeability amount needs to be determined based on the green ventilation rate.
Green Permeability characterization 100ml of gas permeates 1 inch at a high column pressure of 4.88 inches2The water-resistant breathable film of (1). Pressure of 4.88 inches of water ≈ 1.24KPa, 1 inch2＝6.4516cm2. Taking the Green Permeability Rate as an example of 20s, the Green Permeability Rate is converted to a second Permeability quantity (in ml/min/cm)2@7KPa) may be:
100ml/20s/6.4516cm2@1.24KPa＝262.5ml/min/cm2@7KPa。
therefore, the application range of the waterproof breathable film determination method can be expanded, so that the applicable waterproof breathable film can be selected in a wider range.
Referring to fig. 2, an embodiment of the present invention further provides an electronic device, which includes:
a first acquisition module 10 for acquiring a first parameter representative of the volume of a first container, a first gas permeation quantity of said first container being determined on the basis of said first parameter; the first container is provided with an air vent, and the first air permeability is the air permeability which needs to be ventilated through the air vent in order to keep the air pressure in the first container within a preset range in the temperature change process of the air in the first container;
a first determination module 20 for determining air permeability conditions for selecting the waterproof breathable membrane based at least on the first air permeability;
a second determining module 30, configured to determine, if a second air permeability of the waterproof breathable film meets the air permeability condition, the corresponding waterproof breathable film as a target waterproof breathable film for sealing the air vent; wherein the second air permeability is the air permeability of the waterproof breathable film per unit area per unit time under a preset air pressure.
In some embodiments, the electronic device further comprises:
a third determining module, configured to determine a first pressure difference of the first container based on the first parameter, where the first pressure difference is an internal and external pressure difference of the first container after a temperature of gas in the first container changes when the first container is sealed and internal and external pressures of the first container are equal in an initial state;
correspondingly, the first determining module 20 is specifically configured to:
determining the air permeability condition based on the first air permeability amount and the first differential pressure value.
In some embodiments, the second determining module 30 is specifically configured to:
and under the condition that the second air permeability of the waterproof air-permeable membrane meets the air permeability condition and the water pressure resistance value of the waterproof air-permeable membrane is greater than the first pressure difference, determining the corresponding waterproof air-permeable membrane as a target waterproof air-permeable membrane for sealing the air holes.
In some embodiments, the obtaining module determines the first air permeability amount based specifically on the following equation:
wherein P represents the gas pressure in the first container in Pa; t is1Represents the gas temperature in K before the gas temperature in the first container changes; t is2The gas temperature in unit K after the gas temperature in the first container changes is shown; v1The volume before the temperature change of the gas in the first container is shown, namely the volume of the first container, and the unit is ml; v2The volume of the original gas in the first container after the temperature change is expressed as unit ml; t represents the ventilation time in min.
In some embodiments, the gas temperature before the gas temperature in the first container is changed is 288K to 303K, and the gas temperature after the gas temperature in the first container is changed is 348K to 373K; or
The gas temperature before the gas temperature in the first container changes is 348K to 373K, and the gas temperature after the gas temperature in the first container changes is 288K to 303K.
In some embodiments, the electronic device further comprises:
a fourth determination module to determine a cross-sectional area of the vent based on the first amount of venting and the second amount of venting.
In some embodiments, the electronic device further comprises:
and the second acquisition module is used for acquiring the Green ventilation rate of the waterproof breathable film and determining the second ventilation quantity based on the Green ventilation rate.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.
Claims (10)
1. A method for determining a waterproof breathable film, comprising:
obtaining a first parameter indicative of a volume of a first container, determining a first gas transmission capacity of the first container based on the first parameter; the first container is provided with an air vent, and the first air permeability is the air permeability which needs to be ventilated through the air vent in order to keep the air pressure in the first container within a preset range in the temperature change process of the air in the first container;
determining air permeability conditions for selecting the waterproof breathable film based at least on the first air permeability;
under the condition that the second air permeability of the waterproof air-permeable film meets the air permeability condition, determining the corresponding waterproof air-permeable film as a target waterproof air-permeable film for sealing the air holes; wherein the second air permeability is the air permeability of the waterproof breathable film per unit area per unit time under a preset air pressure.
2. The method of determining a waterproof breathable film of claim 1, further comprising:
determining a first pressure difference of the first container based on the first parameter, wherein the first pressure difference is the pressure difference between the inside and the outside of the first container after the temperature of the gas in the first container changes under the condition that the first container is sealed and the pressure inside and the pressure outside the first container is equal in the initial state;
accordingly, the determining air permeability conditions for selecting the waterproof breathable film based at least on the first air permeability comprises:
determining the air permeability condition based on the first air permeability amount and the first differential pressure value.
3. The method of claim 2, wherein the step of determining the corresponding waterproof breathable film as the target waterproof breathable film for sealing the breathable hole in case that the second breathable amount of the waterproof breathable film meets the breathable amount condition comprises:
and under the condition that the second air permeability of the waterproof air-permeable membrane meets the air permeability condition and the water pressure resistance value of the waterproof air-permeable membrane is greater than the first pressure difference, determining the corresponding waterproof air-permeable membrane as a target waterproof air-permeable membrane for sealing the air holes.
4. The method of determining a waterproof breathable film of claim 1, wherein the first amount of air permeability is determined based on the following formula:
wherein P represents the gas pressure in the first container in KPa; t is1Represents the gas temperature in K before the gas temperature in the first container changes; t is2The gas temperature in unit K after the gas temperature in the first container changes is shown; v1The volume before the temperature change of the gas in the first container is shown, namely the volume of the first container, and the unit is ml; v2The volume of the original gas in the first container after the temperature change is expressed as unit ml; t represents the ventilation time in min.
5. The method for determining the waterproof breathable film of claim 4, wherein the gas temperature in the first container before the gas temperature is changed is 288K-303K, and the gas temperature in the first container after the gas temperature is changed is 348K-373K; or
The gas temperature before the gas temperature in the first container changes is 348K to 373K, and the gas temperature after the gas temperature in the first container changes is 288K to 303K.
6. The method of determining a waterproof breathable film of claim 1, further comprising:
determining a cross-sectional area of the vent based on the first vent amount and the second vent amount.
7. The method of determining a waterproof breathable film of claim 1, further comprising:
and acquiring the Green air permeability rate of the waterproof air-permeable membrane, and determining the second air permeability amount based on the Green air permeability rate.
8. An electronic device, comprising:
a first obtaining module for obtaining a first parameter characterizing a volume of a first container, determining a first gas permeation quantity of the first container based on the first parameter; the first container is provided with an air vent, and the first air permeability is the air permeability which needs to be ventilated through the air vent in order to keep the air pressure in the first container within a preset range in the temperature change process of the air in the first container;
a first determination module for determining air permeability conditions for selecting the waterproof breathable membrane based at least on the first air permeability;
a second determining module, configured to determine, when a second air permeability of the waterproof breathable film meets the air permeability condition, the corresponding waterproof breathable film as a target waterproof breathable film for sealing the air vent; wherein the second air permeability is the air permeability of the waterproof breathable film per unit area per unit time under a preset air pressure.
9. The electronic device of claim 8, further comprising:
a third determining module, configured to determine a first pressure difference of the first container based on the first parameter, where the first pressure difference is an internal and external pressure difference of the first container after a temperature of gas in the first container changes when the first container is sealed and internal and external pressures of the first container are equal in an initial state;
correspondingly, the first determining module is specifically configured to:
determining the air permeability condition based on the first air permeability amount and the first differential pressure value.
10. The electronic device of claim 9, wherein the second determining module is specifically configured to:
and under the condition that the second air permeability of the waterproof air-permeable membrane meets the air permeability condition and the water pressure resistance value of the waterproof air-permeable membrane is greater than the first pressure difference, determining the corresponding waterproof air-permeable membrane as a target waterproof air-permeable membrane for sealing the air holes.
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Application publication date: 20210108 |