CN212364157U - Testing device for thermal resistance of heat reflection heat insulation material - Google Patents
Testing device for thermal resistance of heat reflection heat insulation material Download PDFInfo
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- CN212364157U CN212364157U CN202020822333.3U CN202020822333U CN212364157U CN 212364157 U CN212364157 U CN 212364157U CN 202020822333 U CN202020822333 U CN 202020822333U CN 212364157 U CN212364157 U CN 212364157U
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Abstract
The utility model relates to the technical field of heat reflection and insulation material detection, and provides a test device for heat resistance of heat reflection and insulation material, which comprises a box body, wherein a placing platform for placing a sample plate of the insulation material is formed on the upper surface of the box body, and a hollow cavity is formed inside the box body; the first adjusting assembly is arranged outside the box body and used for adjusting external environment parameters of the upper surface of the heat insulation material sample plate; the second adjusting component is connected with the box body and is used for adjusting the internal environment parameters of the chamber; a monitoring component for monitoring the external environmental parameter and the internal environmental parameter. The utility model discloses a test device can simulate the different application environment of heat reflection thermal insulation material, to the test of heat reflection thermal insulation material heat-proof quality, the change of monitoring heat reflection thermal insulation material each item index under corresponding environment, provides the assistance on the equipment, has extensive application.
Description
Technical Field
The utility model relates to a heat reflection thermal insulation material detects technical field, especially relates to a test device of heat reflection thermal insulation material thermal resistance.
Background
When the heat reflection and insulation material is applied to buildings, calculation is often carried out through building design, but the research on the heat insulation performance parameters of the heat reflection and insulation material participating in the building design calculation is insufficient. Since the heat reflective material is a thin interface material, certain conditions are required for the function of the heat reflective material, and the heat conductivity or the heat resistance of the traditional test material cannot be used for evaluation. At present, the research on the heat insulation performance of the heat reflection heat insulation material mainly focuses on the calculation of solar light reflection ratio, hemispherical emissivity, heat insulation temperature difference and equivalent thermal resistance.
The research on the heat insulating property of the solar heat reflecting material in foreign countries is mainly in terms of solar light reflectance and hemispherical emissivity, of which the research in the united states and japan is most representative. However, the solar reflectance or near infrared reflectance and hemispherical emissivity can reveal the heat insulation mechanism of the heat reflection heat insulation material, but cannot reflect the heat insulation degree, and cannot be directly applied to building design, so that the further application of the material is not facilitated.
In the domestic research on the heat reflection heat insulation material, the heat insulation effect is generally represented by adopting heat insulation temperature difference, however, the heat insulation temperature difference only reflects the temperature difference between the heat reflection heat insulation material and a reference plate under the same working condition, and cannot be used for building design. The national scholars also research the calculation method of the equivalent thermal resistance of the heat reflection heat insulation material. The methods of equivalent thermal resistance mainly include 3 methods: the method adopts a steady-state heat transfer principle to calculate, adopts an envelope unsteady-state heat transfer principle to calculate and adopts an annual power consumption index method. However, the calculation process of the equivalent thermal resistance ignores the influence of the heat storage condition of the heat-reflecting heat-insulating material matrix, the surface roughness and the like on the heat-insulating performance of the heat-reflecting heat-insulating material matrix, and in addition, the calculation of the equivalent thermal resistance is influenced by the model to present thermal resistances with different values, so that the actual heat-insulating performance of the heat-reflecting heat-insulating material cannot be really reflected.
In summary, no test method for testing the thermal resistance of the heat reflection heat insulation material in a laboratory is established at home and abroad.
In view of this, the present invention is provided.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a test device of heat reflection thermal insulation material thermal resistance.
According to the utility model discloses a test device of heat reflection thermal insulation material thermal resistance of first aspect embodiment, include
The heat insulation sample plate placing device comprises a box body, a heat insulation material sample plate placing platform and a heat insulation material sample plate placing platform, wherein a hollow cavity is formed inside the box body;
the first adjusting assembly is arranged outside the box body and used for adjusting external environment parameters of the upper surface of the heat insulation material sample plate;
the second adjusting component is connected with the box body and is used for adjusting the internal environment parameters of the chamber;
a monitoring component for monitoring the external environmental parameter and the internal environmental parameter.
According to the utility model discloses an embodiment, still include respectively with first adjusting part the second adjusting part with the controller that the monitoring component is connected.
According to the utility model discloses an embodiment, the controller basis the monitoring component feedback back the external environment parameter with the internal environment parameter, control first adjusting part with the second adjusting part.
According to an embodiment of the invention, the first adjusting assembly comprises
The light source is arranged above the box body and used for emitting light to the surface of the heat insulation material sample plate;
and the reflecting cover is covered above the light source and used for restricting the light rays emitted by the light source and forming parallel light rays irradiating the upper surface of the heat-insulating material sample plate.
Specifically, the light source is arranged above the box body, so that the application environment of the thermal insulation material sample plate under the irradiation of natural light or infrared rays is simulated, different irradiation intensities are adjusted according to different requirements, and the simulation of the environment with different illumination intensities is realized.
Further, the reflector is arranged above the light source, so that at least part of light rays emitted by the light source towards other areas can be reflected under the constraint of the reflector, the reflected light rays form parallel light rays and irradiate on the surface of the heat insulation material sample plate, and a uniform irradiation plane is formed on the surface of the heat insulation material sample plate.
According to an embodiment of the present invention, the light source includes one or a combination of several of a xenon lamp, a dysprosium lamp and an infrared lamp; specifically, the xenon lamp, the dysprosium lamp and the infrared lamp are adopted as the light source, so that the application environment of the heat-insulating material sample plate under the irradiation of natural light or infrared rays is simulated.
According to an embodiment of the invention, the first adjusting assembly comprises
The fan is arranged above or on the side of the box body and used for supplying air to the upper surface of the heat insulation material sample plate;
and the air speed sensor is arranged on the air supply path of the fan and used for monitoring the air speed of the fan.
Specifically, the fan is arranged above or on the side of the box body, so that the application environment of the thermal insulation material sample plate in the presence of natural wind is simulated, the adjustment of different wind strength is realized by adjusting the rotating speed of the fan according to different requirements, and the simulation of wind environments with different magnitudes is realized.
Furthermore, the air speed sensor is arranged on the air supply path of the fan, so that the air supply intensity of the fan can be acquired, the feedback can be received more timely, and the simulation environment can be adjusted timely.
According to an embodiment of the invention, the second adjusting assembly comprises
A regulating device for regulating the ambient temperature and/or humidity inside the chamber;
and one end of the pipeline is connected with the adjusting device, and the other end of the pipeline is connected with the cavity.
Specifically, the adjusting device is used for adjusting the ambient temperature and/or humidity inside the chamber, so that the difference between the ambient temperature and/or humidity outside the box body and the ambient temperature and/or humidity inside the chamber is less than or equal to 10% of the adjusting value of the ambient temperature and/or humidity, parameters of the thermal insulation material sample plate closer to the true value can be obtained during the test, and deviation of the test result caused by the change of the ambient temperature and/or humidity inside the chamber due to the fact that the space inside the chamber is limited when the external environment is simulated externally is avoided.
According to an embodiment of the invention, the monitoring assembly comprises
A first sensor disposed inside the chamber for monitoring an ambient temperature and/or humidity inside the chamber;
the second sensor is arranged on the upper surface of the box body and used for monitoring the surface temperature and/or humidity of the heat-insulating material sample plate;
the irradiation meter is arranged on the upper surface of the box body and used for monitoring the environmental irradiation value of the upper surface of the heat-insulating material sample plate;
the third sensor is arranged in the cavity and close to one side of the top of the box body and is used for monitoring the surface temperature of the heat-insulating material sample plate;
and the heat flux density sensor is arranged in the cavity and close to one side of the top of the box body and is used for monitoring the ambient heat flux density passing through the heat insulation material sample plate.
Specifically, by the arrangement of the first sensor, the second sensor, the irradiator, the third sensor and the heat flow density sensor, the parameter value of the thermal insulation material sample plate can be quickly captured under the condition of simulating an application environment, the environmental parameters such as irradiance, wind speed and environmental temperature of the thermal insulation material sample plate can be monitored by simulating the application environment of the thermal reflection thermal insulation material, the heat flow density of the upper surface temperature, the lower surface temperature and the lower surface of the thermal insulation material sample plate can be tested when the thermal insulation material sample plate reaches a balanced state in the environment, the thermal resistance of the thermal insulation material sample plate can be calculated, a real value can be obtained, and data of the actual thermal insulation performance of the thermal reflection thermal insulation material can be truly reflected.
According to one embodiment of the invention, a heat insulating layer of heat insulating material is sandwiched between the outer surface and the inner surface of the box.
Specifically, by sandwiching the heat insulating layer made of a heat insulating material between the outer surfaces, it is avoided that the change in the ambient temperature and/or humidity inside the chamber is affected by the change in the ambient temperature and/or humidity of the upper surface of the heat insulating material template.
The control method of the thermal resistance testing device for the heat-reflecting heat-insulating material according to the second aspect of the present invention comprises the following steps,
calculating the standard thermal resistance of the standard thermal insulation material sample plate;
adjusting the external environmental parameter of the master insulation material panel;
after adjusting the external environment parameters, calculating the actual thermal resistance of the standard thermal insulation material sample plate;
calculating the equivalent of the thermal resistance according to the ratio of the standard thermal resistance to the actual thermal resistance;
replacing the standard heat-insulating material sample plate with a test heat-insulating material sample plate, repeating the steps of adjusting the external environment parameters and calculating to calculate the actual heat resistance of the test heat-insulating material sample plate;
and calculating the standard thermal resistance of the test thermal insulation material sample plate according to the thermal resistance equivalent and the actual thermal resistance of the test thermal insulation material sample plate.
According to an embodiment of the present invention, the adjusting the external environment parameter of the thermal standard insulation material template includes the steps of,
and in the process of adjusting the external environmental parameters of the standard insulation material sample plate, adjusting the internal environmental parameters of the chamber simultaneously, so that the difference between the environmental temperature and/or humidity outside the box body and the environmental temperature and/or humidity in the chamber is less than or equal to 10% of the environmental temperature and/or humidity adjustment value.
Specifically, by keeping the difference between the ambient temperature and/or humidity outside the box body and the ambient temperature and/or humidity inside the cavity to be less than or equal to 10% of the environmental temperature and/or humidity regulation value, that is, simulating that the thermal insulation material sample plate is influenced by the variation of the environmental parameters such as irradiance, wind speed, ambient temperature and humidity in the application environment, when the variation of the environmental parameters reaches a steady-state variation, the self-performance of the thermal insulation material sample plate and the variation of the corresponding parameters also reach a steady state, the thermal insulation performance of the thermal insulation material sample plate can be truly reflected.
According to an embodiment of the present invention, the calculating the actual thermal resistance of the thermal insulation material sample plate after adjusting the external environment parameter comprises the following steps,
measuring the upper surface temperature, the lower surface temperature and the heat flux density of the standard heat-insulating material sample plate before calculating the actual heat resistance of the standard heat-insulating material sample plate; after the heat flux density is changed in a steady state, the temperature of the upper surface and the temperature of the lower surface of the standard heat insulation material sample plate are recorded, the actual thermal resistance of the standard heat insulation material sample plate is calculated, the calculation formula is as follows,
in the formula (I), the compound is shown in the specification,
r-thermal resistance, K/W;
Touter cover-the ambient temperature of the upper surface of the insulation material template, K;
Tinner part-the ambient temperature of the lower surface of the insulation material template, K;
q-ambient heat flux through the insulation template, W/m2；
A-area of template of heat insulating material, m2。
Specifically, the thermal resistances of the standard insulation material sample plate and the test insulation material sample plate can be calculated by substituting the standard insulation material sample plate and the test insulation material sample plate into the above formulas, respectively.
The embodiment of the utility model provides an in above-mentioned one or more technical scheme, one of following technological effect has at least: the utility model discloses a test device can simulate the different application environment of heat reflection thermal insulation material, to the test of heat reflection thermal insulation material heat-proof quality, the change of monitoring heat reflection thermal insulation material each item index under corresponding environment, provides the assistance on the equipment, has extensive application.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a thermal resistance testing apparatus for a heat reflective insulation material according to an embodiment of the present invention.
Fig. 2 is a first schematic diagram of a control logic of a testing apparatus for testing thermal resistance of a heat reflective insulation material according to an embodiment of the present invention.
FIG. 3 is a second schematic diagram of the control logic of the testing apparatus for testing the thermal resistance of the heat reflective insulation material according to the embodiment of the present invention.
FIG. 4 is a third schematic diagram of the control logic of the testing apparatus for testing the thermal resistance of the heat reflective insulation material according to the embodiment of the present invention.
Reference numerals:
1: a box body; 101: a chamber; 2: a controller; 3: a light source; 4: a reflector; 5: a fan; 6: a wind speed sensor; 7: a first sensor; 8: an adjustment device; 9: a pipeline; 10: a second sensor; 11: an radiometer; 12: a third sensor; 13: a heat flow density sensor; 14: a thermal insulation material template.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Fig. 1 is the utility model discloses thermal insulation material thermal resistance's test device schematic diagram mainly shows the utility model discloses thermal insulation material thermal resistance's test device sets up the relation between each part, for the convenience of observing the detail, has carried out scaling on some parts, can see from fig. 1, the utility model discloses a box 1, box 1 are inside to be provided with hollow cavity 101, and box 1's top is provided with light source 3 and bowl 4, and box 1's lateral part is provided with fan 5, is provided with the air velocity transducer 6 that is used for monitoring on fan 5's the air supply route, and air velocity transducer 6 can set up on box 1, also can set up in fan 5's air outlet department.
Further, the upper surface of the cabinet 1, that is, below the light source 3, is provided with the thermal insulation material template 14, and the second sensor 10 and the radiometer 11, for convenience of observation, the second sensor 10 and the radiometer 11 are enlarged in fig. 1, and the arrangement position thereof may be on the cabinet 1, and fig. 1 is merely an illustration of one position, and does not represent a connection relationship.
Further, in fig. 1, a third sensor 12 and a heat flux density sensor 13 are disposed in the chamber 101 near a top wall side of the chamber 101 for monitoring relevant environmental parameters of the lower surface of the insulation material template 14.
Further, in fig. 1, inside the chamber 101, there are provided a first sensor 7 and a line 9, and a regulating device 8 connected to the line 9, the regulating device 8 being used for regulating the temperature and/or humidity of the environment inside the chamber 101.
Further, in fig. 1, the wind speed sensor 2, the first sensor 7, the second sensor 10, the radiometer 11, and the third sensor 12 are further included, and the controller 2 is capable of receiving external environment parameters and internal environment parameters fed back by the wind speed sensor 6, the first sensor 7, the second sensor 10, the radiometer 11, and the third sensor 12, and correspondingly controlling and adjusting the fan 5, the light source 3, and the adjusting device 8 according to the external environment parameters and the internal environment parameters, that is, the controller 2 may independently control the fan 5, the light source 3, and the adjusting device 8 to simulate different application scenarios, and in addition, the controller 2 is electrically connected to the sensors of each portion, and the electrical connection may be a wired connection or a wireless connection.
Further, in fig. 1, other sensors for monitoring environmental parameters may be provided, and the present invention is only to give some examples.
Fig. 2 is a first schematic diagram of the control logic of the testing apparatus for testing the thermal resistance of the heat reflective insulation material of the present invention, which is mainly used for showing the control method of the testing apparatus for testing the thermal resistance of the heat reflective insulation material of the present invention.
Fig. 3 and fig. 4 are a second schematic diagram of the control logic of the testing device for the thermal resistance of the heat reflective insulation material of the present invention, which mainly refines the control method of the testing device for the thermal resistance of the heat reflective insulation material of the present invention.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Particularly, the utility model provides a pair of test device and device's control method of heat reflection thermal insulation material thermal resistance, the device is through the application environment of simulation heat reflection thermal insulation material to each item index of monitoring heat reflection thermal insulation material under corresponding environment changes, tests its actual thermal resistance when reaching balanced state in this environment, can really reflect the actual heat-proof quality of heat reflection thermal insulation material, and can simulate different environment according to actual need, and it is more extensive to use, in concrete practical application, as follows.
In a specific embodiment, the utility model provides a thermal resistance testing device for heat reflection heat insulation materials, which comprises a box body 1, wherein a placing platform for placing a heat insulation material sample plate 14 is formed on the upper surface of the box body 1, and a hollow cavity 101 is formed inside the box body 1; a first adjusting assembly provided outside the cabinet 1 for adjusting external environmental parameters of the upper surface of the insulation material template 14; the second adjusting component is connected with the box body 1 and used for adjusting the internal environment parameters of the chamber 101; the monitoring component is used for monitoring external environmental parameters and internal environmental parameters; and the controller 2 is respectively connected with the first adjusting component, the second adjusting component and the monitoring component.
As a preferable mode of the present embodiment, the first adjusting unit is provided on a side or an upper side of the case 1.
In one embodiment, as shown in fig. 1, the first adjusting unit of the present invention includes a light source 3 disposed above the cabinet 1, for emitting light to the surface of the insulation material pattern 14 under the control of the controller 2; and the reflecting cover 4 is covered above the light source 3 and used for restraining the light rays emitted by the light source 3 and forming parallel light rays irradiating the upper surface of the heat insulation material sample plate 14.
Specifically, the light source 3 is arranged above the box body 1, so that the application environment of the thermal insulation material sample plate 14 under the irradiation of natural light or infrared rays is simulated, the adjustment of different irradiation intensities is realized through the controller 2 according to different requirements, and the simulation of the environment with different illumination intensities is realized.
Further, a reflector 4 is disposed above the light source 3, so that at least part of the light emitted from the light source 3 toward other areas can be reflected under the constraint of the reflector 4, and the reflected light forms parallel light to irradiate the surface of the insulation material sample plate 14, thereby forming a uniform irradiation plane on the surface of the insulation material sample plate 14.
It should be noted that, the light emitted by the light source 3 is diffused toward the periphery of the light source 3, and the reflector 4 includes a first cover body disposed on the upper portion of the light source 3 and a second cover body connected to the periphery of the first cover body and disposed in an umbrella shape, wherein the light source 3 is disposed in the accommodating space formed by the first cover body and the second cover body, and the arrangement enables the light emitted by the light source 3 to be emitted multiple times in the first cover body and the second cover body to form parallel light rays, which irradiate on the surface of the thermal insulation material sample plate 14.
In a specific embodiment, as shown in fig. 1, the light source 3 of the present invention includes any one or a combination of several of xenon lamp, dysprosium lamp and infrared lamp; specifically, the xenon lamp, the dysprosium lamp and the infrared lamp are adopted as the light source 3 for simulating the application environment of the thermal insulation material template 14 under the irradiation of natural light or infrared rays.
In one embodiment, as shown in fig. 1, the first adjusting unit of the present invention includes a blower 5 disposed above or at a side of the cabinet 1, and used for blowing air to the upper surface of the insulation material pattern 14 under the control of the controller 2; and an air velocity sensor 6 provided in an air supply path of the fan 5 and configured to feed back an air velocity of the fan 5 to the controller 2.
Specifically, the fan 5 is arranged above or on the side of the box body 1, the application environment of the thermal insulation material sample plate 14 in the presence of natural wind is simulated, the rotating speed of the fan 5 is adjusted through the controller 2 according to different requirements, adjustment of different wind strength is achieved, and simulation of wind environments with different magnitudes is achieved.
Further, the air speed sensor 6 is arranged on the air supply path of the fan 5, so that the air supply intensity of the fan 5 can be acquired, the controller 2 can receive feedback more timely, and the simulation environment can be adjusted timely.
It should be noted that the ambient temperature and/or humidity outside the box 1 includes the overall ambient temperature and/or humidity in the space where the box 1 is located, in addition to the external environmental parameters of the upper surface of the thermal insulation material template 14, and this setting is intended to ensure that the box 1 is in a stable environment and avoid the influence of the external temperature and/or humidity change on the test data.
Further, by controlling and adjusting the overall ambient temperature and/or humidity in the space where the box 1 is located, the ambient temperature and/or humidity inside the chamber 101 also has a relative adjustment value, where the adjustment value is a target ambient temperature and/or humidity inside the chamber 101 under a normal working condition of the testing apparatus.
Further, control and regulation of the overall environment temperature and/or humidity in the space where the box body 1 is located can be achieved through the controller 2, the controller 2 achieves regulation of the environment temperature and/or humidity of the closed space through components or the box body 1 or the closed space, and control and regulation of the overall environment temperature and/or humidity in the space where the box body 1 is located are achieved.
In one embodiment, as shown in fig. 1, the second adjustment assembly of the present invention comprises an adjustment device 8 connected to the controller 2 for adjusting the ambient temperature and/or humidity inside the chamber 101; the line 9 is connected to the regulating device 8 at one end and to the chamber 101 at the other end.
Specifically, the environment temperature and/or humidity inside the chamber 101 is adjusted by the adjusting device 8, so that the difference between the environment temperature and/or humidity inside the chamber 101 and the environment temperature and/or humidity outside the box 1 is less than or equal to 10% of the adjustment value of the environment temperature and/or humidity, and parameters of the thermal insulation material sample plate 14 closer to the true value can be obtained during the test, thereby avoiding the deviation of the test result caused by the change of the environment temperature and/or humidity inside the chamber 101 due to the limited space inside the chamber 101 when the external environment is simulated to change.
It should be noted that the adjusting device 8 can adjust the temperature and/or humidity of the environment inside the chamber 101 by using air cooling or water cooling, the adjusting device 8 can use an air compressor and related accessories, or can use a condenser and related accessories, and the adjusting device can adjust the temperature and/or humidity of the environment inside the space by using corresponding accessories, which are well known to those skilled in the art, and for the sake of brevity, the usage amount and the usage manner are not particularly limited.
Further, when the conditioning device 8 is air-cooled, a nozzle hole facing the chamber 101 is provided in the duct 9 in the chamber 101 to inject cool air into the chamber 101.
In one embodiment, as shown in fig. 1, the present invention provides a testing apparatus for thermal resistance of heat reflective insulation material, wherein the monitoring component comprises a first sensor 7 disposed inside the chamber 101 for feeding back the ambient temperature and/or humidity inside the chamber 101 to the controller 2; a second sensor 10 provided on the upper surface of the cabinet 1 for feeding back the surface temperature and/or humidity of the insulation material pattern 14 to the controller 2; the irradiation meter 11 is arranged on the upper surface of the box body 1 and used for feeding back the environmental irradiation value of the upper surface of the thermal insulation material sample plate 14 to the controller 2; a third sensor 12 disposed near a top side of the cabinet 1 in the chamber 101 for feeding back a surface temperature of the insulation material pattern 14 to the controller 2; a heat flux density sensor 13 is disposed in the chamber 101 near the top side of the cabinet 1 for feeding back the ambient heat flux density through the insulation material template 14 to the controller 2.
Specifically, by the arrangement of the first sensor 7, the second sensor 10, the radiometer 11, the third sensor 12 and the heat flow density sensor 13, the parameter value of the thermal insulation material sample plate 14 under the condition of simulating the application environment can be quickly captured, the environmental parameters such as irradiance, wind speed and surface temperature of the thermal insulation material sample plate 14 can be monitored by simulating the application environment of the thermal reflection thermal insulation material, and when the thermal insulation material sample plate 14 reaches a balanced state in the environment, the temperature of the upper surface, the temperature of the lower surface and the heat flow density of the lower surface are tested, so that the thermal resistance of the thermal insulation material sample plate 14 can be calculated, a real value can be obtained, and data of the actual thermal insulation performance of the thermal reflection thermal.
It should be noted that the second sensor 10 and the third sensor 12 are thermocouples or infrared temperature sensors, and the methods of using the thermocouples or infrared temperature sensors are well known to those skilled in the art, and for the sake of brevity, the usage amount and the usage manner thereof are not particularly limited.
In one application scenario, the first sensor 7 is an air temperature sensor and is in communication with the controller 2 to feed back air temperature parameters inside the chamber 101 to the controller 2.
In one application scenario, the first sensor 7 is an air humidity sensor and is in communication with the controller 2 for feeding back air humidity parameters inside the chamber 101 to the controller 2.
In one application scenario, the first sensor 7 includes an air temperature sensor and an air humidity sensor, and can acquire environmental parameters in the chamber 101 according to the setting conditions of the controller 2.
In one embodiment, as shown in fig. 1, the present invention provides a device for testing thermal resistance of heat reflective insulation material, wherein a heat insulating layer made of heat insulating material is sandwiched between the outer surface and the inner surface of a case 1.
Specifically, by interposing the heat insulating layer made of the heat insulating material between the outer surfaces, it is prevented that the change in the ambient temperature and/or humidity inside the chamber 101 is affected by the change in the ambient temperature and/or humidity of the upper surface of the heat insulating material template 14.
In one embodiment, as shown in FIG. 2, the present invention provides a method for controlling a thermal resistance testing apparatus for a heat reflective insulation material, comprising the steps of,
calculating the standard thermal resistance of the standard thermal insulation material sample plate;
adjusting external environmental parameters of the standard thermal insulation material template;
after adjusting external environment parameters, calculating the actual thermal resistance of the standard thermal insulation material sample plate;
calculating the equivalent of the thermal resistance according to the ratio of the standard thermal resistance to the actual thermal resistance;
replacing the standard heat-insulating material sample plate with a test heat-insulating material sample plate, repeating the steps of adjusting the external environment parameters and calculating to calculate the actual thermal resistance of the test heat-insulating material sample plate;
and calculating the standard thermal resistance of the test thermal insulation material sample plate according to the thermal resistance equivalent and the actual thermal resistance of the test thermal insulation material sample plate.
It should be noted that the step of calculating the standard thermal resistance of the standard thermal insulation material sample plate refers to the measurement and calculation of the thermal insulation material sample plate 14 by using a standard test method, and the specific standard can refer to GB/T10294, GB/T10295 or GB/T13475.
The step of adjusting the external environment parameters of the thermal insulation standard template refers to the simulation of the external application environment of the thermal insulation standard template, and specifically can be adjusting the ambient temperature, the ambient relative humidity, the irradiance and the wind speed.
Wherein the regulation interval of the environmental temperature is 15-35 ℃, the regulation interval of the environmental relative humidity is 30-80%, and the regulation interval of the irradiance is 200W/m2To 1000W/m2In between, the interval of wind speed regulation is 0m/s to 6 m/s.
In one embodiment, as shown in fig. 3, the present invention provides a method for controlling a thermal resistance testing apparatus for a heat reflective insulation material, which adjusts external environmental parameters of a template of a standard insulation material, comprising the steps of,
in the process of adjusting the external environmental parameters of the master thermal insulation material panel, the internal environmental parameters of the chamber 101 are simultaneously adjusted such that the difference between the ambient temperature and/or humidity outside the cabinet 1 and the ambient temperature and/or humidity inside the chamber 101 is 10% or less of the adjusted value of the ambient temperature and/or humidity.
Specifically, by keeping the ambient temperature and/or humidity outside the box 1 and the ambient temperature and/or humidity difference inside the cavity 101 within a range of less than or equal to 10% of the ambient temperature and/or humidity adjustment value, that is, by simulating that the insulation material template 14 is influenced by the variation of the environmental parameters such as irradiance, wind speed, ambient temperature and humidity in the application environment, when the variation of the environmental parameters reaches a steady-state variation, the performance of the insulation material template 14 itself and the variation of the corresponding parameters also reach a steady state, the insulation performance of the insulation material template 14 can be truly reflected.
In one embodiment, as shown in fig. 4, the present invention provides a method for controlling a thermal resistance testing apparatus for a heat reflective insulation material, which comprises the following steps of calculating an actual thermal resistance of a standard insulation material sample plate after adjusting external environment parameters,
measuring the upper surface temperature, the lower surface temperature and the heat flux density of the standard heat insulation material sample plate before calculating the actual heat resistance of the standard heat insulation material sample plate; after the heat flux density is changed in a steady state, the temperature of the upper surface and the temperature of the lower surface of the standard heat insulation material sample plate are recorded, the actual thermal resistance of the standard heat insulation material sample plate is calculated, the calculation formula is as follows,
in the formula (I), the compound is shown in the specification,
r-thermal resistance, K/W;
Touter cover-the ambient temperature of the upper surface of the insulation material template, K;
Tinner part-the ambient temperature of the lower surface of the insulation material template, K;
q-ambient heat flux through the insulation template, W/m2；
A-area of template of heat insulating material, m2。
Specifically, the thermal resistances of the standard thermal insulation material sample plate and the test thermal insulation material sample plate can be calculated by substituting the standard thermal insulation material sample plate and the test thermal insulation material sample plate into the above formulas, respectively.
It should be noted that the above calculation formula is a general formula, that is, when calculating the standard insulation material sample plate and the test insulation material sample plate, the calculation can be performed by replacing the insulation material sample plate 14 in the above formula, respectively.
In one application scenario, the calculation formula of the equivalent thermal resistance is as follows,
in the formula:
eta-thermal resistance equivalent;
R1actual thermal resistance, K/W, of the standard thermal insulation material sample plate of the test method;
R2standard thermal resistance, K/W, of the standard insulation material sample as measured by GB/T10294, GB/T10295 or GB/T13475.
By the calculation formula of the equivalent thermal resistance, the following formula can be derived,
in the formula:
eta-thermal resistance equivalent;
R3the actual thermal resistance, K/W, of the thermal insulation material sample plate measured by the test method;
R4and the standard thermal resistance, K/W, after conversion of the thermal resistance equivalent corresponds to the standard thermal resistance of a test thermal insulation material sample plate measured by GB/T10294, GB/T10295 or GB/T13475.
In one application scenario, a standard thermal resistance of 7.4K/W is tested by a GB/T10294 standard test method for a standard thermal insulation material sample plate with the size of 300mm multiplied by 20 mm.
Adjusting the environmental temperature to 24 ℃, the relative humidity to 52 percent and the irradiance of a heat-insulating property testing device of the heat-reflecting material to 600W/m2And wind speed 2 m/s.
The standard insulation panel was placed in a test apparatus for thermal resistance of heat reflective insulation.
Starting the controller 2, monitoring the heat insulation performance of the heat reflection material, and recording corresponding parameters (the upper surface temperature is 50 ℃, the lower surface temperature is 42 ℃, and the heat flux density is 0.60W/m)2)。
And when the temperature of the upper surface and the temperature of the lower surface of the standard heat insulation material template reach balance, closing the heat reflection heat insulation performance equipment, and taking down the standard heat insulation material template.
The actual thermal resistance of the standard thermal insulation material sample plate in the application simulation environment of the thermal resistance test device of the heat reflection thermal insulation material is calculated, the calculation result is as follows,
calculating the equivalent thermal resistance according to the standard thermal resistance and the actual thermal resistance of the standard thermal insulation material sample plate, wherein the calculation result is as follows,
the quasi-thermal insulation material sample plate is replaced by a test thermal insulation material sample plate, the actual thermal resistance of the test thermal insulation material sample plate is measured under the parameters of the application environment simulation, the actual thermal resistance of the test thermal insulation material sample plate is measured to be 1.8K/W, the standard thermal resistance of the test thermal insulation material sample plate is further calculated according to the equivalent thermal resistance, the calculation result is as follows,
finally, obtaining the standard thermal resistance of the test thermal insulation material sample plate.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some embodiments, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above embodiments are merely illustrative, and not restrictive, of the present invention. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various combinations, modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of the technical solutions should be covered by the scope of the claims of the present invention.
Claims (9)
1. A test device for thermal resistance of heat reflection heat insulation material is characterized by comprising
The heat insulation sample plate placing device comprises a box body, a heat insulation material sample plate placing platform and a heat insulation material sample plate placing platform, wherein a hollow cavity is formed inside the box body;
the first adjusting assembly is arranged outside the box body and used for adjusting external environment parameters of the upper surface of the heat insulation material sample plate;
the second adjusting component is connected with the box body and is used for adjusting the internal environment parameters of the chamber;
a monitoring component for monitoring the external environmental parameter and the internal environmental parameter.
2. The apparatus for testing thermal resistance of heat reflective insulation material according to claim 1, further comprising a controller connected to said first regulating assembly, said second regulating assembly and said monitoring assembly respectively.
3. The apparatus for testing thermal resistance of heat reflective insulation material according to claim 2, wherein said controller controls said first adjusting assembly and said second adjusting assembly according to said external environmental parameter and said internal environmental parameter fed back from said monitoring assembly.
4. The testing apparatus for thermal resistance of heat reflective insulation material according to any one of claims 1 to 3, wherein the first adjusting means comprises
The light source is arranged above the box body and used for emitting light to the surface of the heat insulation material sample plate;
and the reflecting cover is covered above the light source and used for restricting the light rays emitted by the light source and forming parallel light rays irradiating the upper surface of the heat-insulating material sample plate.
5. The device for testing the thermal resistance of a heat-reflecting thermal-insulating material according to claim 4, wherein the light source comprises any one or a combination of xenon lamp, dysprosium lamp and infrared lamp.
6. The apparatus for testing thermal resistance of heat reflective insulation material according to claim 1, wherein the first adjusting assembly comprises
The fan is arranged above or on the side of the box body and used for supplying air to the upper surface of the heat insulation material sample plate;
and the air speed sensor is arranged on the air supply path of the fan and used for monitoring the air speed of the fan.
7. The apparatus for testing thermal resistance of heat reflective insulation material according to claim 1, wherein said second adjustment assembly comprises
A regulating device for regulating the ambient temperature and/or humidity inside the chamber;
and one end of the pipeline is connected with the adjusting device, and the other end of the pipeline is connected with the cavity.
8. The device for testing thermal resistance of heat reflective insulation material according to claim 1, wherein the monitoring assembly comprises
A first sensor disposed inside the chamber for monitoring an ambient temperature and/or humidity inside the chamber;
the second sensor is arranged on the upper surface of the box body and used for monitoring the surface temperature and/or humidity of the heat-insulating material sample plate;
the irradiation meter is arranged on the upper surface of the box body and used for monitoring the environmental irradiation value of the upper surface of the heat-insulating material sample plate;
the third sensor is arranged in the cavity and close to one side of the top of the box body and is used for monitoring the surface temperature of the heat-insulating material sample plate;
and the heat flux density sensor is arranged in the cavity and close to one side of the top of the box body and is used for monitoring the ambient heat flux density passing through the heat insulation material sample plate.
9. The apparatus for testing thermal resistance of heat reflective insulation material according to any one of claims 1 to 3, wherein a thermal insulation layer made of heat insulating material is interposed between the outer surface and the inner surface of the case.
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