JP2021162579A - Heat transmission coefficient measuring apparatus and method - Google Patents

Abstract

To provide a heat transmission coefficient measuring apparatus and method capable of easily measuring a heat transmission coefficient while, for example, each component having a complicated shape of an automobile is mounted on the automobile.SOLUTION: A heating box provided internally with heating means and blowing means to have non-permeability and heat insulation performance, a plurality of temperature measuring means for respectively measuring atmospheric temperature on a high temperature side of a heat insulation performance measuring object and atmospheric temperature on a low temperature side of the heat insulation performance measuring object, and a control part are provided and arranged so as to form a circuit in which a plurality of thermopiles or a plurality of heat flowmeters in the case that the thickness of a peripheral wall part is constant over the entire area of the peripheral wall part of the heating box, or the plurality of heat flowmeters in the case that the thickness of the peripheral wall part is not constant are serially connected at predetermined prescribed equal area intervals, the heating means and the blowing means in the heating box are controlled such that output voltage from the circuit obtained by serially connecting the plurality of thermopiles or the plurality of heat flowmeters, and a heat transmission coefficient is outputted on the basis of temperature information from the temperature measuring means.SELECTED DRAWING: Figure 1

Description

The present invention measures the thermal transmissivity even if the surface shape of the measurement target range of the measurement target for which the heat insulation performance is measured is a plane shape, a curved surface, or a surface having a change in three dimensions. The present invention relates to a thermal transmissivity measuring device and a method capable of measuring the thermal transmission rate.

Non-Patent Document 1 describes a calibration heat box method and a protective heat box method as a method for measuring the heat insulating property of a building component, and in the protective heat box method, a heating box is installed in the protective heat box to protect heat. The box is a technology that measures the amount of heat lost through the test piece based on the amount of heat lost parallel to the surface of the test piece and the amount of heat lost from the peripheral wall of the heating box and is controlled to minimize the amount of heat supplied to the heating box. It is difficult to measure in an ideal state where both the amount of heat loss parallel to and the amount of heat loss from the peripheral wall of the heating box are zero. Therefore, the calibration heat box method, which has been improved based on the protective heat box method, measures the amount of heat passing through the test piece by subtracting the amount of heat loss parallel to the surface of the test piece and the amount of heat loss from the peripheral wall of the test piece from the amount of heat supplied to the heating box. The technology is disclosed.

Further, as described in "8.3 Thermopile", the thermopile is used to monitor the heat flow in the peripheral wall of the heating box, and in "8.5 temperature control", the inside of the heating box, the protective heat box and the cooling chamber is used. It is described that the fluctuation of the air temperature in the above is within 1% of the air temperature difference on both sides of the test piece in two consecutive measurement periods. On the other hand, as for the equipment of the calibration heat box method, the entire equipment is installed in the constant temperature room as described in "5.2 Calibration heat box method". "7.2.1 Box structure" states that the heating box is made of an airtight material and is brought into close contact with the test piece.

Non-Patent Document 2 describes a heat insulating test method for fittings, and as described in "Fig. 3 Calibration Heat Box Method Test Device (Cross Section)", a test piece is installed at the boundary between a high temperature chamber and a low temperature chamber. A method is disclosed in which a heat box is installed on the high temperature chamber side of the test piece, the test piece is manufactured in accordance with the provisions of Japanese Industrial Standard JIS A1420, and the thermal transmission rate of the test piece is measured in accordance with the provisions.

Patent Document 1 describes heat from dimensions such as the external dimensions of a cold insulation vehicle body, temperature information such as the temperature inside the cold insulation vehicle body, and a heater voltage transducer that detects the voltage of a heat transfer heater installed in the cold insulation vehicle body as a digital quantity. An automatic thermal transmission rate measuring device for a cold-insulated vehicle body that calculates the thermal transmission rate is disclosed.

Japanese Unexamined Patent Publication No. 2-272334

Japanese Industrial Standard JIS A1420 Japanese Industrial Standard JIS A4710

In order to improve the efficiency of air conditioning performance and fuel efficiency of automobiles such as hybrid vehicles and electric vehicles, it is required to improve the heat insulation performance inside the automobile. Therefore, there is a growing demand for a method that can easily evaluate the heat insulating performance of each part such as a back door, a front door, a rear door, or a roof, which forms a peripheral wall in a vehicle on which an automobile occupant rides.

In Non-Patent Document 1, as shown in FIG. 5A, the heat transmission coefficient is determined by the amount of heat passing from one surface of the test piece 25 in contact with the high temperature side to the other surface in contact with the low temperature side. Using the protective heat box method test device 20 including the box 21, the protective heat box 22, the cooling chamber 23, the heating means 24, the blower means 26, and the test body 25, the area A perpendicular to the heat flow of the test body 25. It is obtained by dividing the amount of heat passing through the test piece Φ1 by multiplying the value of Φ1 by the value obtained by subtracting the atmospheric temperature Tne on the cooling side from the atmospheric temperature Tni on the heating box 21 side. Further, it is required that the atmospheric temperature Tni on the heating box 21 side and the atmospheric temperature Tne on the cooling side are constant.

The amount of heat passing through the test body Φ1 is tested as the amount of heat Φ3 passing from the peripheral wall portion of the heating box 21 toward the protective heat box 22 side from the heat generation amount Φp of the heating means 24 and the blowing means 26 installed inside the heating box 21. The amount of heat loss Φ2 parallel to the surface of the body 25 is subtracted. According to "5.1 Protective Heat Box Method" of Non-Patent Document 1, "Ideally Φ2 = Φ3 = 0, but it is difficult to set Φ2 = Φ3 = 0 in actual measurement, so Φp On the other hand, it is necessary to calibrate Φ2 and Φ3. " Therefore, there is a problem that it is troublesome to calibrate the heat loss amount Φ2 and the passing heat amount Φ3 in advance.

As shown in FIG. 5B, the calibration heat box method test apparatus 30 of Non-Patent Document 2 is installed at the boundary between the high temperature chamber 32 and the low temperature chamber 33, and is internally provided in the heating box 31 and the heating box 31 for heating. The means 34, the blowing means 35 and the baffle 36, the baffle 38 and the blowing means 37 installed in the low temperature chamber 33, and the mounting panel 39 having a high heat insulating property for mounting the test body 40 are provided. The flow of heat flow is almost the same as that of the protective heat box method test apparatus 20 shown in FIG. It is almost negligible. Therefore, also in Non-Patent Document 2, the amount of heat Φ3 passing from the peripheral wall portion of the heating box 31 toward the high temperature chamber 32 side has to be calibrated in advance using a calibration plate having a known thermal resistance. There was a problem.

Further, as shown in FIGS. 5A or 5B, the thermal transmissivity measuring device 20 specified in Non-Patent Document 1 and the thermal transmissivity measuring device 30 specified in Non-Patent Document 2 are both building components. The shape of the upper end edge of the heating box 21 or 31 is a straight shape without unevenness because it is basically measured for a flat plate-like body. Therefore, in order to measure the thermal transmission rate of a test piece having a three-dimensionally changing shape such as a back door of an automobile part, that is, an object 10 for measuring heat insulation performance, a heating box is used, for example, as shown in FIG. 11 or FIG. A dedicated heating box 71 or protective heat box 72 is provided according to the shape of the upper end edge of 71 and the shape of the upper end edge of the protective heat box 72 surrounding the heating box 71 so as to match the shape of the back door of automobile parts that changes in three dimensions. I had to make it.

For example, in order to measure the thermal transmission rate of the back door of an automobile, as shown in FIG. 11, the shape of the upper edge of the heating box 71 in which the heating / blowing means 73 provided with the heating means 3 and the blowing means 4 is installed. Further, a thermal transmissivity measuring device 70 having a shape dedicated to the back door is manufactured so that the upper surface shape of the protective heat box 72 matches the shape of the back door 74, and heat is shown as shown in FIGS. 12 (a) or 12 (b). A back door 74 is placed in the opening of the thermal transmissivity measuring device 70 to close the inside of the heating box 71, and the thermal transmissivity is measured. This means that the thermal transmission rate measuring device dedicated to a specific part must be manufactured for each part having a different shape, so the investment efficiency is extremely low and it is difficult to store many types of thermal transmission rate measuring devices. There was a problem.

Further, the thermal transmissivity measuring device 20 specified in Non-Patent Document 1 or the thermal transmissivity measuring device 30 specified in Non-Patent Document 2 can be used for measurement in a room such as a constant temperature room, and the parts to be measured are brought in as a single unit. Since it is premised that it is attached to a thermal transmissivity measuring device for measurement, there is a troublesome problem that measurement cannot be performed unless, for example, the back door of an automobile part is removed from the automobile and brought in.

Further, the housing of the cooling chamber of the thermal transmissivity measuring device 20 specified in Non-Patent Document 1 or the thermal transmissivity measuring device 30 specified in Non-Patent Document 2 is made of a heat insulating material capable of light shielding. For this reason, for example, the heat transmission from natural light is generated in the outer panel member of an automobile, but there is a problem that the thermal transmission rate due to the influence of the thermal radiation heat from natural light on the object to be measured for the thermal transmission rate corresponding to the outer panel member cannot be grasped. was there.

The invention of Patent Document 1 evaluates the heat insulation performance of the entire cold insulation vehicle body, and has a problem that it is not possible to measure the thermal transmission rate indicating the heat insulation performance for each component constituting an automobile.

The present invention has been devised in view of these problems. For example, it is intended to provide a thermal transmissivity measuring device and a method capable of easily measuring a thermal transmissivity while being attached to an automobile for each part having a complicated shape of an automobile. Make it an issue.

The heat transmission coefficient measuring device according to claim 1 is a heat transmission coefficient measuring device that measures the amount of heat passing from one surface in contact with the high temperature side in the thickness direction of the heat insulating performance measurement object to the other surface in contact with the low temperature side. A heating box having non-ventilation and heat insulating properties, in which a heating means and a blowing means are installed internally, and the opening is closed and closed by the installation of the heat insulating performance measurement object, and the heat insulating performance measurement. A plurality of temperature measuring means for measuring the ambient temperature inside the heating box on the high temperature side of the object and the atmospheric temperature of the space on the low temperature side of the heat insulating performance measurement object, and heat by controlling the heating means. It is equipped with a control unit that calculates the transmission coefficient, and can measure the temperature difference between the inner surface and the outer surface in the entire peripheral wall of the heating box with the output voltage. A circuit is formed in which the plurality of thermopile or the plurality of heat flow meters are connected in series by arranging them one by one at equal area intervals, and the control unit connects the plurality of thermopile or the plurality of heat flow meters in series. It is characterized in that the heating means in the heating box is controlled so that the output voltage from the circuit is zero.

The thermal transmissivity measuring device according to claim 2 has, in claim 1, when the thickness of the peripheral wall portion of the heating box is substantially uniform over the entire area, the entire inner surface or the entire outer side of the peripheral wall portion of the heating box. It is characterized in that a plurality of thermal flow meters are arranged over the surface, or a plurality of thermopile are arranged one by one at substantially equal area intervals over the entire inner surface and the outer outer surface of the peripheral wall portion of the heating box. And.

The thermal transmissivity measuring device according to claim 3, in claim 1, when the thickness of the peripheral wall portion of the heating box is non-uniform over the entire area, the entire inner surface or the entire outer side of the peripheral wall portion of the heating box. It is characterized in that a plurality of thermal flow meters are arranged one by one at substantially equal area intervals over the surface.

In any one of claims 1 to 3, the heat transmission coefficient measuring device according to claim 4 sets the substantially equal area spacing to the inner side of the peripheral wall portion of the heating box and when the thermopile is arranged. All surfaces on the outer side have the same equal area spacing, or when the heat flow meter is arranged, all surfaces on the inner or outer side of the peripheral wall portion of the heating box have equal area spacing, and the above, etc. It is characterized in that a substantially equal area obtained by dividing by any one of 5 equal area divisions to 80 equal area divisions as an area interval is set as an interval.

In any one of claims 1 to 4, the thermal transmissivity measuring device according to claim 5 is installed so that the heating box is removable from the box-shaped body, and the heating box is breathless and heat insulating. It is characterized in that it is a heating bag having a bag-like shape provided with a flexible peripheral wall portion.

The thermal transmissivity measuring device according to claim 6 is a water-cooled type according to any one of claims 1 to 5, wherein the air in the housing is cooled by a heat exchanger in the housing forming the space on the low temperature side. Alternatively, it is characterized by providing an air-cooled cooling means for sending cold air into the housing.

According to claim 6, the thermal transmissivity measuring device according to claim 7 is located on a wall portion of the housing forming the space on the low temperature side, which faces the object of heat insulation performance measurement, and is outside the housing. It is characterized by providing a glass wall portion capable of radiating the object to be measured for heat insulation performance in the housing from a light source provided on the side.

The thermal transmissivity measuring device according to claim 8 is a plate-shaped baffle provided in claim 7 between the glass wall portion and the heat insulating performance measuring object substantially parallel to the heat insulating performance measuring object. The plate is characterized by being a glass plate capable of radiating the object to be measured for heat insulation performance from the light source.

The thermal transmissivity measuring device according to claim 9 is characterized in that, in claim 7 or 8, the radiation intensity adjusting means for adjusting the radiation intensity with respect to the heat insulating performance measurement object in the housing is provided. And.

The heat transmission coefficient measuring device according to claim 10 has, in any one of claims 7 to 9, a blower means between the glass wall portion and the heat insulating performance measurement object and in the vicinity of the glass wall portion. It is characterized in that the airflow velocity control means is provided so that the air velocity generated by the air blowing means can be reproduced by selecting the wind speed from the wind speeds under natural conditions.

The heat transmission coefficient measuring method according to claim 11 is a method of measuring the thermal transmission rate of an automobile door using a heating bag, and the heating bag is a heating / blowing means arranged in a substantially central portion. If the peripheral wall portion is provided with a peripheral wall portion capable of surrounding the heating / blowing means, the peripheral wall portion has non-ventilation, heat insulation and flexibility, and the thickness of the peripheral wall portion is uneven over the entire area. Approximately equal area obtained by dividing a plurality of thermal flow meters by the number of equal area divisions from 5 equal area divisions to 80 equal area divisions over the entire surface on the inner side or the entire surface on the outer side of the peripheral wall portion. The heating bag is installed inside the door opening of the automobile, and the peripheral wall portion of the heating bag is sandwiched. As described above, the door is closed to close the opening, the inside of the heating bag is closed, the door of the automobile is used as an object for measuring the heat insulating performance, and the plurality of thermal flow meters attached to the peripheral wall portion are connected in series. The heating means in the heating bag is controlled so that the output voltage from the circuit becomes zero, and the thermal atmosphere temperature in the vehicle is controlled so that the atmospheric temperature in the vehicle is stabilized, and the thermal transmission rate is calculated. It is a feature.

The method for measuring the heat transmission coefficient according to claim 12 is a method for measuring the heat transmission coefficient of an automobile door using a heating bag, and the heating bag is a heating / blowing means arranged in a substantially central portion. If the peripheral wall portion is provided with a peripheral wall portion capable of surrounding the heating / blowing means, the peripheral wall portion has non-ventilation, heat insulation and flexibility, and the thickness of the peripheral wall portion is substantially uniform over the entire area. A plurality of thermopile is divided by the same number of equal area divisions from 5 equal area divisions to 80 equal area divisions on each of the two surfaces over the entire surfaces of the two surfaces on the inner side and the outer side of the peripheral wall portion. A plurality of heat flow meters are arranged one by one at intervals of substantially equal areas obtained, and the plurality of thermopile is connected in series, or a plurality of heat flow meters over the entire surface on the inner side or the entire surface on the outer side of the peripheral wall portion. The plurality of heat flow meters were connected in series by arranging one by one at intervals of substantially equal areas obtained by dividing by the number of equal area divisions of any of 5 equal area divisions to 80 equal area divisions. A circuit is provided, the heating bag is installed inside the door opening of an automobile, the door is closed so that the peripheral wall portion of the heating bag is sandwiched, the opening is closed, and the inside of the heating bag is closed. Then, the door of the automobile is used as an object for measuring the heat insulation performance, and the output voltage from the circuit in which the plurality of thermopile attached to the peripheral wall portion is connected in series or the output from the circuit in which the plurality of heat flow meters are connected in series. It is characterized in that the heating means in the heating bag is controlled so that the voltage becomes zero, and the atmospheric temperature is controlled so as to stabilize the atmospheric temperature inside the automobile, and the heat transmission coefficient is calculated.

The thermal transmissivity measuring method according to claim 13 is characterized in that, in claim 11 or 12, the door is any of a front door, a rear door, and a back door.

The thermal transmissivity measuring device according to any one of claims 1 to 4 has realized that the heat flow balance from the peripheral wall portion of the heating box to the box-shaped body side can be regarded as zero, and therefore the protective heat of Non-Patent Document 1 It has a remarkable effect that it is not necessary to grasp and calibrate the "heat loss from the peripheral wall of the heating box Φ3" specified by the box method test apparatus in advance. This makes it possible to release the restriction that the protective heat box, which is a constituent requirement of the protective heat box method test apparatus, must be integrally assembled with the heating box. For example, the protective heat box can be used in an automobile. The body can now be used as a substitute.

In addition, it is possible to minimize the measurement error between the thermal transmissivity measured in the protective heat box method test of Non-Patent Document 1 and the thermal transmissivity measured by the thermal transmissivity measuring device of the present invention.

The thermal transmissivity measuring device according to claim 5 is conventionally made of a material having non-breathability and heat insulating properties when measuring a heat insulating performance measuring object whose shape changes in three dimensions, and is an outer surface of the heat insulating performance measuring object. It is necessary to manufacture a protective heat box and a heating box that match the shape, and it is possible to make the material of the peripheral wall of the heating box a flexible member so that only the object whose heat insulation performance is to be measured can be used. By doing so, it is possible to handle heat insulation performance measurement objects that have a shape that changes in three dimensions with one heating bag, so one heating box does not have to be specially manufactured for each heat insulation performance measurement object with a different shape. It has the effect that a heating bag is sufficient.

Since the thermal transmission rate measuring device according to claim 6 can easily carry the cooling means, it does not need to be measured in a low temperature constant temperature room, or it is integrated with the heating box specified in Non-Patent Document 1 or Non-Patent Document 2. There is an effect that a highly accurate thermal transmission rate can be obtained at any measurement location inside or outside the room without using a conventional cooling chamber.

The thermal transmissivity measuring device according to claims 7 to 9 has an effect of being able to measure the thermal transmissivity when affected by the radiant heat generated from natural light such as the sun, which is generated on the outer panel member of an automobile, for example. ..

The thermal transmissivity measuring device according to claim 10 has an effect of being able to measure the thermal transmissivity when affected by wind speed, which is a natural condition.

The method for measuring the thermal transmission rate of an automobile door according to any one of claims 11 to 13 has an effect that the thermal transmission rate can be measured by attaching a heating bag to the automobile with the door attached.

In the explanatory view of the thermal transmissivity measuring device of the present invention, in the explanatory view of the form in which the material of the peripheral wall portion of the heating box is a flexible member, (a) is a thermopile arranged at equal area intervals. It is an explanatory view of the plan view when it is expanded, and (b) is the explanatory view of the AA cross section of (a). (A) is an explanatory view in which a plurality of thermopile is arranged over the entire peripheral wall portion of the heating box of the thermal transmissivity measuring device of the present invention, and (b) is an explanatory view in which a plurality of heat flow meters are arranged. be. (A) is an explanatory view in which a thermopile is arranged over the entire peripheral wall portion made of a flexible member of the heating box of the thermal transmissivity measuring device of the present invention, and (b) is a plurality of heat flow meters. It is explanatory drawing which arranged. An explanatory diagram of a portable cooling box provided on the low temperature side, (a) is an explanatory diagram of a water cooling system, and (b) is an explanatory diagram of an air cooling system. In the explanatory diagram of the Japanese Industrial Standards, (a) is an explanatory diagram of the protective heat box method test apparatus of the Japanese Industrial Standards JIS A1420 of Non-Patent Document 1, and (b) is the calibration of the Japanese Industrial Standards JIS A4710 of Non-Patent Document 2. It is explanatory drawing of the hot box method test apparatus. It is explanatory drawing of the apparatus which tests the arrangement interval and the measurement error of the thermopile and the like arranged in a heating box. It is an explanatory view of the development view of the heating box shown in FIG. It is an explanatory diagram of 20 equal area intervals on the entire surface with an area interval, and (c) is an explanatory diagram of 45 equal area intervals on the entire surface with 9 equal area intervals on one surface. It is a figure which shows the relationship between the number of equal area divisions with respect to the whole surface of a wall surface part which determines the arrangement interval of a thermopile, and the thermopile measurement error. It is a figure which shows the test result of the reliability of the measured value of the thermal conductivity measuring apparatus of this invention using the test body which knows the thermal conductivity. It is explanatory drawing of the part to measure thermal transmission rate of an automobile, and it is explanatory drawing of the part which can attach a heating bag to an automobile, and the part which cannot attach a heating bag unless it is removed from an automobile. It is explanatory drawing of the heating box which made the upper edge part to fit the shape of the outer peripheral edge of a back door, for example. 11 is a view in which a back door is attached to the heating box shown in FIG. 11, FIG. 11A is a perspective explanatory view with the back door attached, and FIG. 11B is a cross-sectional explanatory view taken along line BB in FIG. 11A. The heating bag of the thermal transmissivity measuring device of the present invention is attached to the back door of an automobile, (a) is an explanatory view of the state of the heating bag attached to the back door as seen from the inside of the automobile, and (b) is It is explanatory drawing of the state in which the back door seen from the outside of a car is opened and a heating bag is attached. It is the development view of the heating box and the explanatory view of the equal area spacing, and is the explanatory view of 36 equal area spacing on the whole surface when one surface becomes the whole surface. It is explanatory drawing of the thermal transmission rate measuring apparatus which additionally installed a light source, a glass wall part and the like. It is a figure which shows the relationship between the air volume of a blower, and a thermal transmission rate under the condition of radiant heat. It is a figure which shows the change of the thermal transmission rate in the situation where there is no thermal radiation, and when there is the thermal heat by light irradiation.

The thermal transmissivity measuring device 1 and the method of the present invention are devices and methods for measuring the thermal transmissivity of the heat insulating performance measurement object 10. Using a calibration plate whose thermal resistance is known in advance, the amount of heat Φ3 that first passes from the peripheral wall of the heating box 2 toward the protective heat box 6 side, which was a problem in Non-Patent Document 1 or Non-Patent Document 2. The troublesome problem of having to calibrate, and secondly, the shape of the upper edge that receives the heat insulation performance measurement object 10 of each of the heating box 2 and the protective heat box 6 is three-dimensional of the heat insulation performance measurement object 10. In order to solve the problem that a dedicated heating box 2 and a protective heat box 6 must be manufactured according to the shape changing in the above, the inventor has conceived the thermal transmissivity measuring device 1 and the method of the present invention.

As shown in FIG. 2A or FIG. 2B, the heat transmission coefficient measuring device 1 of the present invention is in contact with the high temperature side of the heat insulating performance measurement object 10 in the thickness direction. It is a heat transmission coefficient measuring device 1 for measuring the amount of heat passing from one surface to the other surface in contact with the low temperature side. The heating box 2 having non-ventilation and heat insulating properties in which the opening is closed and closed, the atmospheric temperature inside the heating box 2 on the high temperature side of the heat insulating performance measurement object 10, and the heat insulating performance. The heating is provided with a plurality of temperature measuring means 15 and 16 for measuring the atmospheric temperature of the space on the low temperature side of the object 10 to be measured, and a control unit 7 for controlling the heating means 3 and calculating the heat transmission coefficient. A plurality of thermopile 11s or a plurality of heat flow meters 12 are arranged one by one at substantially equal area intervals so that the temperature difference between the inner surface and the outer surface in the entire peripheral wall portion 9 of the box 2 can be measured by the output voltage. , The plurality of thermopile 11 or the plurality of heat flow meters 12 are connected in series, respectively, and the control unit 7 is from a circuit in which the plurality of thermopile 11 or the plurality of heat flow meters 12 are connected in series. The heating means 3 in the heating box 2 is controlled so that the output voltage becomes zero.

Further, the thermal transmissivity measuring device 1 includes a box-shaped body 6 that surrounds the entire peripheral wall portion 9 of the heating box 2 and forms a closed space with the heating box 2, and the heating means is contained in the box-shaped body 6. 19 and the blower means 17 are installed internally, the blower means 17 continues to operate, and the control unit 7 is provided inside the box-shaped body 6 so as to keep the atmospheric temperature inside the box-shaped body 6 constant. The heating means 19 is controlled by the control unit 7 based on the temperature information from the means (not shown).

The thermal transmissivity measuring device 1 has a form A in which the heating box 2a and the box-shaped body 6 are separated as shown in FIG. 1, and the heating box 2 and the box-shaped body 6 as shown in FIG. 2 or FIG. There is a form B that can be integrally assembled. In the case of the embodiment A, the box-shaped body 6 corresponds to, for example, a body forming the inside of the vehicle on which the occupant of the automobile 80 rides.

That is, in the case of the embodiment A, the thermal transmissivity measuring device 1 can substitute the housing of the box-shaped body 6 with the body of the automobile 80, and measures the heating means 19, the blower means 17, and the temperature inside the vehicle. By bringing the vehicle interior temperature stabilizing means provided with the means and the control means into the vehicle of the automobile 80, the same function as that of the box-shaped body 6 can be exhibited.

In the thermal transmissivity measuring device 1, as shown in FIG. 2 or 3, the heat insulating performance measurement object 10 is supported only by the peripheral wall 9 having heat insulating properties of the heating box 2 and is isolated from the box-shaped body 6. Therefore, the amount of heat loss parallel to the surface of the heat insulating performance measurement object 10 can be regarded as zero, and the output voltage representing the temperature difference between the inner surface and the outer surface in the entire peripheral wall portion 9 of the heating box 2. Is controlled to zero, so that the heat flow balance from the peripheral wall portion 9 of the heating box 2 to the box-shaped body 6 side can be regarded as zero. As a result, the first problem is "a calibration plate whose thermal resistance is known in advance for the amount of heat Φ3 passing from the peripheral wall of the heating box 2 toward the protective heat box 6 side and the amount of heat loss Φ2 parallel to the surface of the test piece. I was able to eliminate the annoyance of having to calibrate using.

Therefore, the thermal transmissivity measuring device 1 is calculated from the measured values of the power consumed by the heating means 3 and the blower means 4, and the thickness of the heat insulating performance measurement object 10 from the inside of the heating box 2. The amount of heat that passes through the adiabatic performance measurement object 10 to the space on the low temperature side along the direction, the area perpendicular to the heat flow in the adiabatic performance measurement object 10, and the ambient temperature inside the heating box 2. And the temperature of the atmosphere of the space on the low temperature side of the adiabatic performance measurement object 10, the thermal transmissivity of the adiabatic performance measurement object 10 can be calculated. Therefore, when the thermal transmissivity measuring device 1 is used, if the amount of heat supplied in the heating box Φp calculated from the measured values of the electric power consumed by the heating means 3 and the blowing means 4 is grasped, the passing heat amount Φ3 and the passing heat amount Φ3 It has a remarkable effect that the passing heat amount Φ1 can be easily obtained without considering the heat loss amount Φ2.

As shown in FIG. 2, the heating box 2 of the thermal transmissivity measuring device 1 of the present invention is provided with a heating means 3 and a blowing means 4 internally, and the opening is closed by the attachment of the heat insulating performance measurement object 10. It becomes a debris blockage state. The peripheral wall portion 9 of the heating box 2 has non-ventilation and heat insulating properties, and the temperature inside the heating box 2 is maintained constant. The heating means 3 may have a heater, for example, as long as it can heat, and the blower means 4 may have a fan, for example, as long as it can blow air. The heating means 3 is controlled by the control unit 7, but the ventilation means 4 is always operated without being controlled by the control unit 7.

As shown in FIGS. 2 and 3, the heating box 2 is a housing having an opening at the upper portion, and has a configuration in which the heat insulating performance measurement object 10 is placed on the peripheral edge of the upper opening, and the heat insulating box 2 is heat-insulated. The performance measurement object 10 is isolated so as not to come into contact with the box-shaped body 6. The peripheral wall portion 9 of the heating box 2 is made of at least a non-breathable and heat-insulating member. A heating means 3, a blower means 4, and a temperature measuring means 15 are internally provided in the heating box 2.

The amount of heat lost on the side surface of the heat insulating performance measurement object 10 is set to zero by the configuration in which the heat insulating performance measurement object 10 is supported only by the peripheral edge portion 9 of the heating box 2 and is in contact with only the peripheral edge portion 9. Can be regarded.

The plurality of temperature measuring means 15 and 16 include a temperature sensor 15 for measuring at least the ambient temperature inside the heating box 2 on the high temperature side of the heat insulating performance measuring object 10 and a low temperature of the heat insulating performance measuring object 10. A temperature sensor 16 for measuring the temperature of the atmosphere of the space on the side is provided. The temperature information from the temperature sensors 15 and 16 is stored in a data logger (not shown) installed in the control unit 7. The atmospheric temperature inside the heating box 2 and the temperature of the atmosphere in the space on the low temperature side are calculated by the control unit 7 as data for calculating the thermal transmissivity.

Next, the control unit 7 heats the heating box so that the output voltage from the circuit in which the plurality of thermopile 11s are connected in series or the output voltage from the circuit in which the plurality of heat flow meters 12 are connected in series becomes zero. The heating means 3 installed inside the 2 is controlled, and the temperature of the atmosphere inside the heating box 2 from the temperature sensor 15 and the temperature of the atmosphere of the space on the low temperature side of the heat insulating performance measurement object 10 from the temperature sensor 16 are data. It is input to a logger (not shown) and stored, and the heat transfer area of the heat insulation performance measurement object 10 (the area perpendicular to the heat flow in the heat insulation performance measurement object 10), the heating means 3, and the blower are known in advance. Control is performed to derive and output the heat transfer coefficient based on the amount of heat supplied by the means 4. The output can be displayed on a display provided in the control unit 7 or a screen of a connected personal computer.

The box-shaped body 6 surrounds the entire peripheral wall portion 9 of the heating box 2 and forms a closed space with the heating box 2. The protective heat box 22 in Non-Patent Document 1 and the high temperature chamber 32 in Non-Patent Document 2 are improved in the present invention, and in the present invention, any one capable of forming a closed space with the heating box 2 is sufficient. It was made possible to use it inside a car instead of a protective heat box or a high temperature room. For example, as shown in FIG. 10, the heating box 2 can be installed in the vehicle interior 81 of the automobile 80 with all the doors closed so that the measurement can be performed. The box-shaped body 6 corresponds to the body of the automobile 80, and the closed space between the heating box 2 and the box-shaped body 6 corresponds to the inside of the vehicle in which all the doors of the automobile 80 are fully closed.

Next, the thermopile 11 or the heat flow meter 12 will be described. When the thickness of the peripheral wall portion 9 of the heating box 2 is substantially uniform over the entire area, FIGS. 1 (a), (b), 2 (a), (b), or 3 (a), (b). As shown in the above, a plurality of heat flow meters 12 over the entire inner surface or outer surface of the peripheral wall portion 9 of the heating box 2, or the entire inner surface and outer side of the peripheral wall portion 9 of the heating box 2. A plurality of thermopile 11s are arranged one by one at substantially equal area intervals over the entire surface.

Further, as shown in FIG. 2B or FIG. 3B, when the thickness of the peripheral wall portion 9 of the heating box 2 is non-uniform over the entire area, the entire inner surface of the peripheral wall portion 9 of the heating box 2 is formed. Alternatively, a plurality of heat flow meters 12 are arranged one by one at substantially equal area intervals over the entire surface on the outer side.

When the output voltage from the circuit in which the plurality of thermopile 11s are connected in series or the output voltage from the circuit in which the plurality of heat flow meters 12 are connected in series becomes zero, the peripheral wall portion 9 of the heating box 2 is passed through. It can be considered that the heat flow balance with respect to the space formed by the box-shaped body 6 is zero. As a result, it is troublesome to grasp and calibrate the "heat loss from the peripheral wall of the heating box Φ3" specified in the protective heat box method of Non-Patent Document 1 as shown in FIG. 5 (a) in advance. It does not have to be.

Next, a plurality of thermopile 11s are arranged on the front and back surfaces of the inner side and the outer side of the peripheral wall portion 9 at substantially equal area intervals, and the output voltage due to the plurality of thermopile 11s is controlled to zero. It was verified that an accurate thermal transmissivity could be obtained by using a thermal transmissivity measuring device 1c for studying thermopile arrangement as shown in FIG. The thermal transmissivity measuring device 1c includes a peripheral wall portion 9 and a box-shaped body 6 of the heating box 2, and all five surfaces of the peripheral wall portion 9 have a size of 1 m square. Since the thermal conductivity and thickness of the peripheral wall portion 9 of the heating box 2 are known, the amount of heat passing through the peripheral wall portion 9 Q2 can be calculated. Further, since the thermal transmission rate, heat transfer area, atmospheric temperature inside the heating box, and atmospheric temperature on the cooling side of the test body 10a can be grasped, the heat passing amount Q1 of the test body 10a can be obtained. Therefore, the measured error is the value obtained by subtracting the total heat flow balance value Q3 by the thermopile 11 or the heat flow meter 12 from the passing heat amount Q2 of the peripheral wall portion 9 of the heating box 2 with the passing heat amount Q1 of the test body 10a as the denominator. Calculate as.

That is, the calculated amount of heat passing through Q2 was compared with Q3 measured by the thermopile 11 or the heat flow meter 12. If the difference between the passing heat amount Q2 and the total heat flow balance value Q3 is large, the measurement error becomes large, and if the difference between the passing heat amount Q2 and the total heat flow balance value Q3 becomes small, the measurement error becomes small.

Test Example 1 is a case where one thermopile is arranged at the center of one surface of 1 m square as shown in FIG. 7 (a) which is a developed view of the peripheral wall portion 9, and the entire surface is divided into 5 equal areas and equal areas. Each thermopile arranged on the five surfaces was connected in series to form a plurality of thermopile 11 composed of five thermopile. In Test Example 2, as shown in FIG. 7 (b), which is a developed view of the peripheral wall portion 9, one surface of 1 m square is divided into four equal areas, and one thermopile is arranged at the center of each surface. In the case of equal area by area division, a plurality of thermopile 11 composed of 20 thermopile in which thermopile arranged on 5 surfaces is connected in series was used. In Test Example 3, as shown in FIG. 7 (c), which is a developed view of the peripheral wall portion 9, one surface of 1 m square is divided into nine equal areas, and one thermopile is arranged at the center of each surface. In the case of equal area by area division, a plurality of thermopile 11 composed of 45 thermopile in which thermopile arranged on five surfaces is connected in series was used.

Although it was not carried out as a test example, even if the thermopile 11 is changed to the heat flow meter 12, the same area spacing as in the case of the thermopile 11 can be applied. Further, the form is not limited to the form in which the peripheral wall portion 9 has five surfaces as shown in FIG. 7, and the entire peripheral wall portion 9 may have a single surface as shown in FIG. As shown in FIG. 14, when the entire peripheral wall portion 9 is in the form of one surface, for example, 36 equal areas can be divided, and a plurality of thermopile 11s or a plurality of heat flow meters 12 can be arranged at equal area intervals. That is, if the number of vertical and horizontal divisions is changed, for example, 80 equal area division, 70 equal area division, 60 equal area division, 50 equal area division, and the like can be arbitrarily set.

Further, the thermal transmissivity of the test body 10a is set to 1 W / m ² K (reference numeral Δ in FIG. 8), 2 W / m ² K (reference numeral □ in FIG. 8), and 4 W / m ² K (reference numeral 〇 in FIG. 8). The measurement error due to the number of equal area divisions was verified by changing the value, and the result is shown in FIG. In FIG. 8, the division symbol L indicates the case of 45 equal area division, the division symbol M indicates the case of 20 equal area division, and the division symbol N indicates the case of 5 equal area division. If only one thermopile 11 is provided on the entire surface without dividing the area into equal areas, ^{the measurement error when the thermal transmissivity is 1 W / m 2} K is 79.3%, and the thermal transmissivity is 2 W / m ^2. The measurement error in the case of K was 39.6%, and the measurement error in the case of thermal transmission rate of 4 W / m ² K was 19.8%.

From FIG. 8, when the number of equal area divisions is 20 (equal division area 0.25m ² ), and further, when the number of equal area divisions is 45 (equal division area 0. It is shown that the measurement error is smaller in 11 m ² ), that is, when the number of equal area divisions increases. Further, it is shown that the larger the thermal transmission rate of the test body 10a, the smaller the measurement error. As a result, the equal area spacing for arranging the thermopile 11 is preferably 20 or more equal area divisions, more preferably 45 or more equal area divisions, and further equal area division number in order to further reduce the measurement error. Is more preferably 80. Incidentally, equal area in the case of the one surface of 1m square five combined 5 side as shown in FIG. 7 (a) is preferably 0.25 m ² or less, divided area 0.11 m ² or less being more preferred.

Therefore, in the setting of the substantially equal area spacing, when the thermopile 11 is arranged, the entire surfaces of the inner side and the outer side of the peripheral wall portion 9 of the heating box 2 are set to the same equal area spacing, or the heat flow is set. When a total of 12 is arranged, the entire surface on the inner side or the outer side of the peripheral wall portion 9 of the heating box 2 is set to equal area spacing, and the equal area spacing is divided into 5 equal areas to 80 equal areas. The approximately equal area obtained by dividing by any of the equal area divisions is set as the interval.

In the case of equal area division of less than 5 equal areas, the measurement error is too large and becomes a problem. Since there is a problem of high cost, the number of equal area divisions is preferably any one of 5 equal area divisions to 80 equal area divisions as the equal area interval.

Next, the outside air temperature measured by the temperature sensor 16 with the heat transmission coefficient measuring device 1 as shown in FIG. 2 (corresponds to the air temperature of the cooling chamber 23 of the protective heat box method test device 20 shown in FIG. 5A). It corresponds to the air temperature of the low temperature chamber 33 of the calibration heat box method test apparatus 30 shown in FIG. 5 (b), and corresponds to the air temperature of the space on the low temperature side of the heat insulating performance measurement object 10 of the present invention) and the temperature sensor. The effect of the temperature difference from the air temperature inside the heating box 2 measured in No. 15 on the heat transmission coefficient measurement was tested. The heat insulating performance measurement object 10 uses a building heat insulating material known to have a thermal conductivity of 0.02 W / mK, and thermopile 11 arranged at substantially equal area intervals of approximately ^{0.11 m 2 is connected in series.} The control unit 7 controlled the output voltage from the circuit to be zero. The temperature difference between the outside air temperature and the atmospheric temperature inside the heating box is shown in Graph Q for a temperature difference of 10 ° C., Graph R for a temperature difference of 20 ° C., and Graph S for a temperature difference of 30 ° C., and the results are shown in FIG. Since the heat insulating performance measurement object 10 is a flat plate having a uniform thickness, the thermal transmission rate is converted into the thermal conductivity and displayed in FIG.

From FIG. 9, when the temperature difference is 20 ° C. or higher, a value substantially close to the thermal conductivity of 0.02 W / mK of the building heat insulating material used in the test is obtained. Therefore, it is preferable to measure the thermal transmissivity by setting the temperature difference between the atmospheric temperature in the heating box 2 and the air temperature in the space on the low temperature side of the heat insulating performance measurement object 10 to 20 ° C. or more.

Next, as shown in FIG. 3, the heating box 2 is detachably installed from the box-shaped body 6, and the heating box 2 has a peripheral wall portion 9a that is breathless, heat-insulating, and flexible. It can be a heating bag 2a having a provided bag-like shape. When the heating bag 2a is removed from the box-shaped body 6, the thermal transmissivity measuring device 1a has a form as shown in FIGS. 1A and 1B.

That is, the material of the peripheral wall portion 9a of the heating bag 2a of the thermal transmissivity measuring device 1 as shown in FIG. 3 is a flexible member, and the member is, for example, non-breathable, heat-insulating and flexible. There are foam sealing materials and rubber materials that have a foam seal material, and examples thereof include an Ept sealer (manufactured by Nitto Denko KK) with a thickness of 20 mm. The thickness of the peripheral wall portion 9a is more preferably at least 10 mm or more, preferably 20 mm or more in consideration of the mountability and heat insulating properties of the thermopile 11 or the heat flow meter 12.

When the peripheral wall portion 9a of the heating bag 2a is made of a non-breathable, heat-insulating and flexible member, it expands in a plane shape as shown in FIG. 1 (a) in a plan view or FIG. 1 (b) in a side view. It is possible to install the heating means 3 and the blowing means 4 internally, and the heating / blowing means 8 (the heating means 3 and the blowing means 4 are provided internally) having an opening 8a on the upper surface side is provided in the central portion. The thermopile 11 or the heat flow meter 12 is arranged in series at equal area intervals on the non-breathable, heat-insulating and flexible member. Since it becomes a flexible bag-like body, it can be expanded into a flat plate shape or changed into a bag-like body that is bent and wrapped.

Since the peripheral wall portion 9a of the heating bag 2a is a member having non-breathability, heat insulation, and flexibility, it can be used as a bag-like body. Therefore, as shown in FIG. 3A, a bag-like body provided with a thermopile 11 Or, as shown in FIG. 3 (b), it can be used in a bag-like body provided with a heat flow meter 12. As a result, the peripheral wall portion 9a is made into a bag shape to have flexibility, so that the attachment portion to the heat insulating performance measurement object 10 also has a high degree of freedom, and the shape changes in three dimensions. The heat insulating performance of the object 10 to be measured can be measured by a thermal transmissivity measuring device 1a provided with one heating bag 2a. As a result, the second problem, "the shape of the upper edge of the heating box 2 and the protective heat box 6 that receives the heat insulating performance measurement target 10 is matched with the shape that changes in three dimensions of the heat insulating performance measurement target 10. It was possible to solve the problem of having to manufacture a dedicated heating box 2 and a protective heat box 6.

For example, as shown in FIG. 10, the openable and closable doors such as the front door 83 in the automobile 80 can measure the thermal transmission rate in the state of being attached to the automobile 80, and as shown in FIG. 13B, the back door 74 A thermal transmissivity measuring device 1a provided with a heating / blowing means 8 and a flexible peripheral wall portion 9a is set in the opening, and as shown in FIG. 13A, the peripheral portion of the peripheral wall portion 9a is a back door 74. The thermal transmissivity can be measured with the back door 74 closed so as to be sandwiched between the edges of the opening.

Further, for example, as shown in FIG. 10, since the windshield 82 cannot be opened and closed, it is removed from the automobile 80, but a heating box 2 having a new specially shaped peripheral wall portion that matches the three-dimensional shape of the windshield 82 is manufactured. The thermal transmission rate can be measured using the flexible heating bag 2a.

Next, as shown in FIG. 4, a water-cooled type in which the air in the housing 18 is cooled by a heat exchanger 43 in the housing 18 forming the space on the low temperature side, or cold air in the housing 18 The air-cooled cooling means 50 is provided.

The space inside the housing 18 corresponds to the space on the low temperature side of the heat insulating performance measurement object 10 of the present invention, which is an improvement of the cooling chamber 23 of the protective heat box method test apparatus 20 shown in FIG. 5 (a). Or, it is an improvement of the low temperature chamber 33 of the calibration hot box method test apparatus 30 shown in FIG. 5 (b). Since the protective heat box method test device 20 and the calibration heat box method test device 30 also measure large fittings, they are premised on measurement in a room such as a constant temperature room. Therefore, the cooling chamber 23 or the above. The low greenhouse 33 was large and could not be easily carried. Since the thermal transmissivity measuring device 1 or 1a of the present invention could be made portable, a portable cooling means 50 was conceived accordingly.

As shown in FIG. 4A, the water-cooled cooling means 50 is housed by a heat exchanger 43 provided in the case 18 in which cold water cooled by the circulating water cooling device 41 flows in the pipe 42. The air inside the 18 is cooled, and the cooling air G is flowed as a laminar flow toward the adiabatic performance measurement object 10 by the guide of the baffle 44 by the blowing means 45. It is preferable that the atmospheric temperature in the heating box 6 and the temperature of the cooling air G have a difference of 20 ° C. or more.

In the air-cooled cooling means 50, as shown in FIG. 4B, the cooling air G cooled by the circulating air cooling device 41a flows in the duct 46 through the partition plate 47 provided in the housing 18. While being guided, it flows as a laminar flow toward the heat insulating performance measurement object 10. It is preferable that the atmospheric temperature in the heating box 2 and the temperature of the cooling air G have a difference of 20 ° C. or more.

The portable cooling means 50 eliminates the limitation of the place where the thermal transmissivity is measured, for example, the limitation of the low temperature chamber 33 defined by the calibration thermal box method test device 30, and does not require a large-scale constant temperature room. Since it is possible to easily make a difference of 20 ° C. or more between the ambient temperature in the heating box 2 and the temperature of the cooling air G at the place where the performance measurement object 10 is attached, the heat insulation performance measurement object 10 is attached. It is possible to improve the accuracy of measurement in the place where it is located.

Next, a thermal transmissivity measuring device 1b capable of measuring the thermal transmissivity when the low temperature side is affected by radiation from the sun and wind speed, which are natural conditions, will be described. As shown in FIG. 15, the thermal transmissivity measuring device 1b has the housing 18 on the wall portion of the housing 18 forming the space on the low temperature side facing the heat insulating performance measurement object 10. A glass wall portion 61 that enables radiation from the light source 60 provided on the outside to the object 10 for measuring the heat insulating performance in the housing 18 is provided.

When the baffle plate 44a is installed in the housing 18 in order to obtain a uniform air temperature distribution, the heat insulating performance measurement object is placed between the glass wall portion 61 and the heat insulating performance measurement object 10. A plate-shaped baffle plate 44a provided substantially parallel to the 10 is used as a glass plate capable of radiating the heat insulating performance measurement object 10 from the light source 60.

Then, for example, a radiation intensity adjusting means is provided so that the thermal transmission rate when the outer panel of the automobile is affected by radiation from the sun, which is a natural condition, can be measured. The radiant intensity adjusting means controls, for example, to increase the radiant intensity, that is, to increase the light source temperature when increasing the radiant heat, and to decrease the radiant intensity, that is, to decrease the light source temperature when the radiant heat is decreased. It is a means for controlling the radiation. The radiation intensity adjusting means includes a slidac for controlling the temperature of the light source 60, for example, a slidac provided in the control unit 7 for converting the magnitude of the voltage applied to the light source 60. By adjusting the radiation intensity adjusting means, the radiation intensity of the heat insulating performance measurement object 10 in the housing 18 is adjusted.

Further, for example, in order to make it possible to measure the heat transmission coefficient when the outer panel of the automobile is affected by the wind, which is a natural condition, it is between the glass wall portion 61 and the heat insulating performance measurement object 10. An airflow velocity control means 45 is provided in the vicinity of the glass wall portion 61, and an airflow velocity control means capable of reproducing a wind speed selected from natural wind speeds is provided in the control unit 7, and an airflow generated by the blower means 45 is provided. Adjusting the speed of.

First, the relationship between the air volume of the blower 45 and the thermal transmissivity obtained by using the thermal transmissivity measuring device 1b will be described. As shown in FIG. 16, as the heat insulating performance measurement object 10, an aluminum plate (thickness 3 mm, △ mark), a polypropylene plate (thickness 0.7 mm, □ mark) and a glass plate (thickness 4 mm, ○ mark) Each flat plate of was used. The horizontal axis shows the air volume and the vertical axis shows the thermal transmission rate. In order to reproduce the natural conditions, in order to verify the influence of radiation by sunlight, the light source 60 was turned on, the radiation heat of the radiation sensor 63 was monitored, and the radiation intensity of the light source 60 was adjusted.

From FIG. 16, it is shown that as the air volume increases, that is, as the speed of the air flow increases, the thermal transmission rate gradually increases regardless of the material of the heat insulating performance measurement object 10. This indicates that when there is wind under natural conditions, for example, the heat flow from the vehicle interior through the outer panel of the vehicle increases as the air volume increases. Therefore, it is possible to evaluate the heat insulating performance of the automobile door structure in consideration of the influence of wind by using the thermal transmissivity measuring device 1b of the present invention.

Next, the relationship between the radiation by light irradiation that reproduces sunlight and the thermal transmissivity obtained by using the thermal transmissivity measuring device 1b will be described. As shown in FIG. 17, in order to verify the effect of radiation close to natural conditions, the light source 60 is turned on during the daytime with radiation close to natural conditions, and the light source 60 is turned off at night without radiation. I made a time zone of and verified it. As the heat insulating performance measurement object 10, each flat plate of an aluminum plate (thickness 3 mm, Δ mark), a polypropylene plate (thickness 0.7 mm, □ mark) and a glass plate (thickness 4 mm, ◯ mark) was used. The horizontal axis shows the elapsed time and the vertical axis shows the thermal transmission rate.

As shown in FIG. 17, when the light source 60 does not generate thermal heat, the thermal transmission coefficient of the heat insulating performance measurement object 10 is substantially the same level for all materials, but when the light source 60 generates thermal heat, heat insulation is performed. It has been shown that the thermal transmissivity of the performance measurement object 10 varies depending on the material. For example, in the case of an aluminum plate (△ mark), the thermal heat generated by the light source 60 is substantially constant regardless of whether it is generated or not, whereas in the case of a polypropylene plate (□ mark) or a glass plate (○ mark). It was shown that when the radiant heat generated by the light source 60 is generated, the apparent thermal transmission rate is lowered as compared with the case where it is not generated. This indicates that the heat shielding performance against radiant heat is worse in the polypropylene plate and the glass plate than in the aluminum plate.

Next, a method for measuring the thermal transmissivity will be described. When the thickness of the peripheral wall portion 9a is non-uniform over the entire area, the first method of measuring the thermal transmission rate is, as shown in FIGS. 1 and 13, the heat transmission of the door of the automobile 80 using the heating bag 2a. A method for measuring the rate, the heating bag 2a includes a heating / blowing means 8 arranged at a substantially central portion and a peripheral wall portion 9a capable of surrounding the heating / blowing means 8, and the peripheral wall portion 9a is provided. Is breathless, heat-insulating, and flexible, and divides a plurality of heat flow meters 12 into 5 equal areas to 80 equal areas over the entire inner surface or the outer surface of the peripheral wall portion 9a. The heating bag 2a is provided with a circuit in which the plurality of heat flow meters 12 are connected in series by arranging one by one at intervals of substantially equal areas obtained by dividing by the number of equal area divisions of any one of the divisions. Is installed inside the door opening of the automobile 80, the door is closed so that the peripheral wall portion 9a of the heating bag 2a is sandwiched, the opening is closed, the inside of the heating bag 2a is closed, and the automobile is closed. The heating means in the heating bag 2a so that the output voltage from the circuit in which the plurality of heat flow meters 12 attached to the peripheral wall portion 9a are connected in series is zero, using the door of 80 as the heat insulating performance measurement object 10. This is a method of calculating the thermal transmissivity by controlling No. 3 and further controlling the temperature inside the vehicle so that the temperature inside the vehicle 80 becomes stable.

When the thickness of the peripheral wall portion 9a is substantially uniform over the entire area, the second method of measuring the heat transmission coefficient is a method of measuring the heat transmission coefficient of the door of the automobile 80 using the heating bag 2a. The heating bag 2a includes a heating / blowing means 8 arranged in a substantially central portion and a peripheral wall portion 9a capable of surrounding the heating / blowing means 8, and the peripheral wall portion 9a is breathless and has heat insulating properties. And flexible, and over the entire surface of each of the two inner and outer surfaces of the peripheral wall portion 9a, a plurality of thermopile 11 is divided into 5 equal areas to 80 equal areas on each of the two surfaces. A circuit in which the plurality of thermopile 11s are connected in series by arranging one by one at intervals of substantially equal areas obtained by dividing by the same number of equal area divisions, or on the inner side of the peripheral wall portion 9a. Over the entire surface or the entire surface on the outer side, a plurality of heat flow meters 12 are divided by the number of equal area divisions of any of 5 equal area divisions to 80 equal area divisions, one by one at intervals of substantially equal areas. The heating bag 2a is installed inside the door opening of the automobile 80, and the peripheral wall portion 9a of the heating bag 2a is sandwiched. As described above, the door is closed to close the opening, the inside of the heating bag 2a is closed, the door of the automobile 80 is used as the heat insulating performance measurement object 10, and the plurality of thermopile 11 attached to the peripheral wall portion 9a are used. The heating means 3 in the heating bag 2a is controlled so that the output voltage from the circuit connected in series or the output voltage from the circuit in which the plurality of heat flow meters 12 are connected in series becomes zero, and the automobile 80 is further controlled. This is a method of calculating the heat transmission coefficient by controlling the atmospheric temperature so as to stabilize the atmospheric temperature inside the vehicle.

In both the first method and the second method of the thermal transmissivity measuring method, the temperature of the closed space inside the vehicle 80 is set so that the vehicle 80 is stored indoors and is not affected by the sunlight outdoors. , A vehicle interior temperature stabilizing means (not shown) equipped with a heating means (not shown) and a blowing means (not shown) is brought into the vehicle, and the brought-in blowing means is always operated during measurement, and the brought-in heating means is used. The operation is controlled so that the ambient temperature inside the vehicle is stable, and the ambient temperature inside the vehicle is stabilized and substantially constant.

The vehicle interior temperature stabilizing means brought into the vehicle of the automobile 80 includes a heating means, a blowing means, a vehicle interior atmosphere temperature measuring means, and a control for controlling the operation of the heating means brought in based on the temperature information from the vehicle interior atmosphere temperature measuring means. Means are provided.

The door is preferably a door that is closed by sandwiching the peripheral wall portion 9a of the heating bag 2a, and corresponds to a front door, a rear door, or a back door.

Next, an example of using the thermal transmissivity measuring device 1 that measures the thermal transmissivity in a state where the back door 74 is attached to the automobile 80 as shown in FIG. 13 will be described. First, as shown in FIG. 1, a bag-shaped heating bag 2a provided with a peripheral wall portion 9a having non-breathability, heat insulation and flexibility, and a heating bag 2a arranged at a substantially central portion of the heating bag 2a. A heating / blowing means 8 having a heating means 3 and a blowing means 4 inside, a temperature measuring means 15 for measuring the atmospheric temperature inside the heating bag 2a, a temperature measuring means 16 for measuring the external atmospheric temperature, and a control unit 7 A thermal transmissivity measuring device 1a including the above is prepared.

Since the thickness of the peripheral wall portion 9a is substantially the same over the entire area, a plurality of thermopile is spread over the entire inner surface and the outer outer surface of the peripheral wall portion 9a of the heating box 2a with an equal area interval of 45 equal areas. The ones arranged one by one at intervals of substantially equal areas obtained by dividing by division were used.

Next, the automobile 80 is moved indoors so as not to be affected by sunlight. Then, as shown in FIG. 13B, the back door 74 is opened, the peripheral wall portion 9a having flexibility is expanded so that the heating / blowing means 8 is on the back door 74 side, and the opening of the back door 74 is opened. And close the back door 74 while maintaining that state. As a result, as shown in FIG. 13A, a closed space is formed inside the heating bag 2a.

Then, a vehicle interior temperature stabilizing means (not shown) equipped with a heating means (not shown) and a blowing means (not shown) is brought into the vehicle, the backrest is laid down, and the vehicle interior temperature stabilizing means is placed. Close the door. A closed space is also formed inside the vehicle by closing all the doors. This closed space corresponds to the closed space of the protective heat box. Then, the ventilation means was operated, and the operation of the heating means was controlled based on the temperature information of the atmosphere inside the vehicle to stabilize the temperature of the atmosphere inside the vehicle.

Then, the blower means 4 of the heating / blower means 8 installed in the heating bag 2a is operated so that the output voltage from the circuit in which the plurality of thermopile is connected in series becomes zero. The heating means 3 is controlled.

Then, the ambient temperature inside the heating bag 2a on the high temperature side of the back door 74, the ambient temperature of the space outside the vehicle on the low temperature side of the back door 74, and the heating means 3 and the blowing means 4 consume. The amount of heat that passes through the back door 74 from the inside of the heating bag 2a to the space on the low temperature side along the thickness direction of the back door 74, which is calculated from the measured value of the electric power, and the back door 74. The thermal transmission rate of the back door 74 is calculated by the control unit 7 using the area perpendicular to the heat flow in.

At this time, if the difference between the atmospheric temperature inside the heating bag 2a on the high temperature side and the atmospheric temperature in the space outside the vehicle on the low temperature side of the back door 74 is set to 20 ° C. or higher, a highly accurate thermal transmission rate is calculated. can.

The thermal transmissivity measuring method is an output voltage from a circuit in which the plurality of thermopile 11s attached to the peripheral wall portion 9a of the heating bag 2a are connected in series or an output from a circuit in which the plurality of heat flow meters 12 are connected in series. By controlling the heating means 3 in the heating bag 2a so that the voltage becomes zero, the housing of the protective heat box specified in Non-Patent Document 1 corresponds to an automobile in a state where all the doors are closed. It has a remarkable effect that the thermal transmission rate can be measured with the door attached to the automobile.

1 Heat transmission rate measuring device 1a Heat transmission rate measuring device 1b Heat transmission rate measuring device 1c Heat transmission rate measuring device 2 Heating box 2a Heating box 3 Heating means 4 Blower means 6 Box-shaped body 7 Control unit 8 Heating / blowing means 8a Opening Part 9 Peripheral wall part 10 Insulation performance measurement object 10a Specimen 11 Thermopile 12 Heat flow meter 15 Temperature sensor 16 Temperature sensor 18 Housing 41 Circulating water cooling device 41a Circulating air cooling device 42 Piping 43 Heat exchanger 44 Baffle 44a Baffle 45 Blower means 46 Duct 47 Partition plate 50 Cooling means 60 Light source 61 Glass wall 63 Floating sensor 70 Heat transmission coefficient measuring device 71 Heating box 72 Protective heat box 73 Heating / blowing means 74 Back door 80 Car 81 Interior 82 Front glass 83 Front door G Cooling air

Claims (13)

Thermal insulation performance measurement A thermal transmissivity measuring device that measures the amount of heat passing from one surface in contact with the high temperature side in the thickness direction to the other surface in contact with the low temperature side.
A heating box with non-breathable and heat-insulating properties, in which a heating means and a ventilation means are installed internally, and the opening is closed and closed by the installation of an object for measuring heat insulation performance.
A plurality of temperature measuring means for measuring the ambient temperature inside the heating box on the high temperature side of the adiabatic performance measurement object and the atmospheric temperature of the space on the low temperature side of the adiabatic performance measurement object, respectively.
A control unit that controls the heating means and calculates the thermal transmissivity is provided.
A plurality of thermopile or a plurality of heat flow meters are arranged one by one at substantially equal area intervals so that the temperature difference between the inner surface and the outer surface in the entire peripheral wall portion of the heating box can be measured by the output voltage. A circuit in which a plurality of thermopile or the plurality of heat flow meters are connected in series is formed.
The thermal transmission unit controls the heating means in the heating box so that the output voltage from the plurality of thermopile or the circuit in which the plurality of heat flow meters are connected in series becomes zero. Rate measuring device. When the thickness of the peripheral wall portion of the heating box is substantially uniform over the entire area, a plurality of thermal flow meters are used over the entire inner surface or the outer surface of the peripheral wall portion of the heating box, or the peripheral wall portion of the heating box. The thermal transmissivity measuring device according to claim 1, wherein a plurality of thermopile is arranged one by one at substantially equal area intervals over the entire inner surface and the outer outer surface. If the thickness of the peripheral wall portion of the heating box is non-uniform over the entire area, a plurality of thermal flow meters are arranged one by one at substantially equal area intervals over the entire inner surface or the outer outer surface of the peripheral wall portion of the heating box. The thermal transmissivity measuring device according to claim 1, wherein the device is provided. In the setting of the substantially equal area spacing, when the thermopile is arranged, the entire surfaces on the inner side and the outer side of the peripheral wall portion of the heating box are set to the same equal area spacing, or the heat flow meter is arranged. In the case, the entire surface on the inner side or the outer side of the peripheral wall portion of the heating box is set to equal area intervals, and the equal area division is any one of 5 equal area divisions to 80 equal area divisions. The heat transmission coefficient measuring device according to any one of claims 1 to 3, wherein a substantially equal area obtained by division is set as an interval. The heating box is detachably installed from the box-shaped body, and the heating box is a heating bag having a bag-like shape having a peripheral wall portion having non-breathability, heat insulation, and flexibility. The thermal transmissivity measuring device according to any one of claims 1 to 4. A claim characterized in that the housing forming the space on the low temperature side is provided with a water-cooled cooling means for cooling the air in the housing with a heat exchanger or an air-cooled cooling means for sending cold air into the housing. Item 4. The thermal transmissivity measuring device according to any one of Items 1 to 5. With respect to the heat insulating performance measurement object in the housing from a light source provided on the outside of the housing on the wall portion of the housing forming the space on the low temperature side facing the heat insulating performance measurement target. The thermal transmissivity measuring device according to claim 6, further comprising a glass wall portion capable of radiating. A plate-shaped baffle plate provided substantially parallel to the heat insulating performance measurement object between the glass wall portion and the heat insulating performance measurement object can be radiated from the light source to the heat insulating performance measurement object. The thermal transmissivity measuring device according to claim 7, wherein the glass plate is used. The thermal transmissivity measuring device according to claim 7 or 8, wherein the radiation intensity adjusting means for adjusting the radiation intensity with respect to the heat insulating performance measurement object in the housing is provided. A blowing means is provided between the glass wall portion and the object for measuring the heat insulating performance in the vicinity of the glass wall portion, and the velocity of the airflow generated by the blowing means is selected from the wind speeds under natural conditions. The thermal transmissivity measuring device according to any one of claims 7 to 9, further comprising an air flow velocity controlling means capable of reproducing the wind speed. This is a method of measuring the thermal transmission rate of automobile doors using a heating bag.
The heating bag includes a heating / blowing means arranged at a substantially central portion and a peripheral wall portion capable of surrounding the heating / blowing means.
The peripheral wall portion has non-breathable, heat insulating and flexible properties.
If the thickness of the peripheral wall is uneven over the entire area,
A substantially equal area obtained by dividing a plurality of heat flow meters by the number of equal area divisions of any of 5 equal area divisions to 80 equal area divisions over the entire surface on the inner side or the entire surface on the outer side of the peripheral wall portion. A circuit in which the plurality of heat flow meters are connected in series by arranging them one by one at intervals of
The heating bag is installed inside the door opening of the automobile, the door is closed so that the peripheral wall portion of the heating bag is sandwiched, the opening is closed, and the inside of the heating bag is closed. Using the door as an object for measuring heat insulation performance
The heating means in the heating bag is controlled so that the output voltage from the circuit in which the plurality of thermal flow meters attached to the peripheral wall portion are connected in series is zero, and the ambient temperature inside the automobile is stabilized. A method for measuring thermal transmission rate, which comprises controlling the temperature of the atmosphere inside the vehicle and calculating the thermal transmission rate. This is a method of measuring the thermal transmission rate of automobile doors using a heating bag.
The heating bag includes a heating / blowing means arranged at a substantially central portion and a peripheral wall portion capable of surrounding the heating / blowing means.
The peripheral wall portion has non-breathable, heat insulating and flexible properties.
When the thickness of the peripheral wall portion is substantially uniform over the entire area,
A plurality of thermopile is divided by the same number of equal area divisions from 5 equal area divisions to 80 equal area divisions on each of the two surfaces over the entire surfaces of the two surfaces on the inner side and the outer side of the peripheral wall portion. A plurality of thermoflow meters are arranged one by one at intervals of substantially equal areas to be obtained, or a circuit in which the plurality of thermopile is connected in series, or a plurality of heat flow meters over the entire surface on the inner side or the entire surface on the outer side of the peripheral wall portion. Was arranged one by one at intervals of substantially equal areas obtained by dividing by the number of equal area divisions of any of 5 equal area divisions to 80 equal area divisions, and the plurality of heat flow meters were connected in series. With a circuit,
The heating bag is installed inside the door opening of the automobile, the door is closed so that the peripheral wall portion of the heating bag is sandwiched, the opening is closed, and the inside of the heating bag is closed. Using the door as an object for measuring heat insulation performance
Heating inside the heating bag so that the output voltage from the circuit in which the plurality of thermopile attached to the peripheral wall portion is connected in series or the output voltage from the circuit in which the plurality of thermal flow meters are connected in series becomes zero. A method for measuring thermal conductivity, which comprises controlling the means and further controlling the atmospheric temperature so as to stabilize the ambient temperature inside the automobile to calculate the thermal transmissivity. The method for measuring thermal transmission rate according to claim 11 or 12, wherein the door is any of a front door, a rear door, and a back door.

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