CN110568262A - A device and method for steady-state detection of thermal insulation coatings - Google Patents

Abstract

The invention discloses a device and method for steady-state detection of thermal insulation coatings. The device includes a heat source, a reinforced concrete room and an electric meter. The heat source is a stainless steel box installed at the center of the reinforced concrete room, and the reinforced concrete wall room is also It is equipped with a heat source box, a constant temperature probe and a temperature thermocouple data collector. The detection method adopts the sequential comparison test method. In the first test, the thermal insulation paint is painted on the surface of the outer wall of the reinforced concrete wall; in the second test, a certain thickness of insulation board is attached to the outer surface of the reinforced concrete wall, and the detection process is recorded. Data, the interval value of its equivalent thermal resistance and the interval value of equivalent thermal conductivity can be calculated by comparison. The present invention can distinguish the authenticity and quality of the thermal insulation paint according to the size of the equivalent thermal resistance of each user unit and the quality inspection mechanism. In this way, the inspection and supervision department also has the basis for inspection and supervision, and the architectural designers also have the basis for building energy-saving design.

Description

A device and method for steady-state detection of thermal insulation coatings

technical field

The invention belongs to the technical field of detection of architectural coatings, and in particular relates to a device and method for steady-state detection of equivalent thermal resistance and equivalent thermal conductivity interval values of thermal insulation coatings.

Background technique

Thermal insulation coatings for buildings have high-efficiency far-middle and near-infrared wide-wavelength, thermal radiation has the function of blocking heat insulation and heat preservation, extraordinary anti-pollution, good adhesion, washing resistance, acid resistance, corrosion resistance and mildew resistance. . Thermal insulation coating is a new type of thermal radiation barrier building thermal insulation material with excellent performance, strong applicability and high technical content in the field of modern building thermal insulation.

The cost of energy-saving functional coatings for buildings will be much higher than that of ordinary coatings, but functional coatings and ordinary coatings cannot be distinguished by naked eyes after construction. How to detect the difference between these coatings and the thermal performance of coatings has become a major problem.

After searching, it is found that the patent announcement number is CN102980911A, a heat-insulating coating equivalent thermal resistance detection device and detection method, specifically, a thermocouple and a solar radiation sensor are connected to the detector signal, and the detector is connected to the computing terminal signal; the detection method Including a thermocouple with a metal sheet attached to the middle of the external surface of multiple external walls; after the adhesive is dry and firm, apply heat-insulating paint and ordinary paint on the external surface of the external wall respectively; The external wall of the solar radiation is received by the solar radiation, and the data is collected by the solar radiation sensor; the effective data of four days is selected and transmitted to the computing terminal after the solar radiation sensor continuously collects for seven days, and the equivalent invention of the thermal insulation coating for the detection wall is calculated by combining the computing software . Through the above method, this technology can target the conditions required for on-site detection of heat-insulating coatings, combined with on-site thermal testing methods, accurately collect data to participate in calculations, and can effectively output temperature curves for analysis, and calculate the equivalent heat of heat-insulating coatings. resistance.

However, the above-mentioned technique is an unsteady-state inspection method, and the error is as large as 50% due to the influence of the weather. The test time is long, the cost is high, and it is not applicable. It is only suitable for the thermal resistance detection of conductive heat transfer materials, and is not suitable for radiation heat insulation. Thermal resistance testing of materials. At the same time, there is no accurate detection equipment and method capable of detecting the energy-saving function of coatings in other prior art. In this way, fake paints and inferior paints are also approved for use, which has caused huge losses to the country and users, making it impossible to quickly test and effectively promote the truly excellent global advanced high-tech environmental protection materials and thermal insulation coatings.

Therefore, the applicant submitted an invention patent with the patent application number 201811079432.0 to the State Intellectual Property Office on September 17, 2018. During the subsequent actual use of the applicant, it was found that, affected by the testing equipment, the equivalent thermal resistance of the coating obtained by testing The accuracy needs to be improved. There are systematic errors in the two rooms and it is found during the comparison experiment that the device and method cannot be used for long-term detection and comparison. Once the comparison experiment is performed for a long time, the accuracy of the experimental data will be affected. decrease with changes in heat source temperature. In addition, due to the use of two boxes, material structure errors, structural temperature heat and power consumption errors, and installation position errors will all cause errors in the detection results. Therefore, how to improve the detection accuracy has become a technical problem to be solved.

Contents of the invention

In order to overcome the above-mentioned deficiencies, the inventors of the present invention have continuously reformed and innovated through long-term exploration attempts and many experiments and efforts, and provided a steady-state detection of the equivalent thermal resistance and equivalent thermal conductivity range of thermal insulation coatings. Apparatus and methods of value.

To achieve the above object, the technical solution adopted in the present invention is:

A device for steady-state detection of the equivalent thermal resistance and equivalent thermal conductivity interval value of thermal insulation coatings, which includes a coating carrier, a heat source installed in the coating carrier, a mounting frame and a data collector, and the data collector is installed on On the installation frame and located in the paint carrier, the data collector is connected to the recorder outside the paint carrier through a cable, and a heating device and a temperature sensor are installed in the heat source, and the heating device and the temperature sensor are connected to the outside of the paint carrier through a cable. Control box connection.

According to a device for steadily detecting the equivalent thermal resistance and equivalent thermal conductivity interval value of thermal insulation coatings described in the present invention, its further preferred technical solution is: the coating carrier is a sealed reinforced concrete room, and its The reinforced concrete wall is formed by pouring reinforced cement concrete.

According to a device for steady-state detection of the equivalent thermal resistance and equivalent thermal conductivity interval value of thermal insulation coatings described in the present invention, its further preferred technical solution is: the reinforced concrete room is composed of 6 surfaces, of which One side is a door, the door is an insulation board with a thickness greater than or equal to 40mm, and the thickness of the remaining reinforced concrete walls is greater than or equal to 60mm.

According to a device for steadily detecting the equivalent thermal resistance and equivalent thermal conductivity interval value of thermal insulation coatings described in the present invention, its further preferred technical solution is: a thermostat switch and a recorder are installed in the control box and electric meter.

According to a device for steadily detecting the equivalent thermal resistance and equivalent thermal conductivity interval value of thermal insulation coatings described in the present invention, its further preferred technical solution is: the heat source is mainly composed of stainless steel box body, boiling water or constant temperature water, Composed of heating tubes, boiling water or constant temperature water is contained in a stainless steel box, and the heating tube is installed in the stainless steel box.

According to a device for steadily detecting the equivalent thermal resistance and equivalent thermal conductivity interval value of thermal insulation coatings described in the present invention, its further preferred technical solution is: the installation frame is a wooden frame, and the wooden frame covers A stainless steel box, the data collector is located in the paint carrier space above the stainless steel box.

According to a device for steadily detecting the equivalent thermal resistance and equivalent thermal conductivity interval value of thermal insulation coatings described in the present invention, its further preferred technical solution is: the data collector is a thermocouple, and the recorder is Logger.

According to a device for steadily detecting the equivalent thermal resistance and equivalent thermal conductivity interval value of thermal insulation coatings described in the present invention, its further preferred technical solution is: the space in the coating carrier is greater than or equal to 0.1 cubic meters m, the ratio between the volume of constant-temperature water or boiling water in the heat source and the space in the paint carrier is 1:18-20.

The present invention also provides a method for steady-state detection of the equivalent thermal resistance and equivalent thermal conductivity interval value of the thermal insulation coating, which includes the following steps:

a. The reinforced concrete room is tested twice. In the first test, the outer wall of the reinforced concrete room and the outside of the insulation board door are painted with thermal insulation paint. In the second test, a certain thickness of the insulation board is pasted outside the reinforced concrete room for comparison. The method is used for detection and analysis, and the operation steps of the two tests are the same;

b. Place a heating water tank with a certain capacity in the first reinforced concrete room, install the data collector, and start heating after injecting water. After the water temperature reaches the set constant temperature, adjust the thermostat switch to keep the constant temperature at the same temperature. The heater in the box is connected to the electric meter, and the data collector is connected to the temperature recorder;

c. Start testing after the equipment is installed, record the temperature in the reinforced concrete room, and record it at least once every minute, and set the time interval value of the testing time to be greater than or equal to 24 hours; if the testing data is the average temperature in the room coated with thermal insulation coating It is higher than the average temperature in the room with thermal insulation board, and the power consumption in the room with thermal insulation coating is less than that in the room with thermal insulation board. After the detection is completed, the equivalent thermal resistance and equivalent thermal conductivity.

According to a method for steady-state detection of the equivalent thermal resistance and equivalent thermal conductivity interval value of the thermal insulation coating described in the present invention, its further preferred technical solution is: the first test is to brush the thermal insulation coating on the On the surface of the outer wall of a reinforced concrete room, after the first test, scrape off the thermal insulation coating and then paste a certain thickness of thermal insulation board. The interval is not less than 48 hours. After cooling, the room temperature is consistent with the temperature of the constant temperature laboratory. Test; in the second test, a certain thickness of insulation board was attached to the surface of the outer wall of the reinforced concrete room.

The steady state mentioned in the present invention means that the temperature outside the reinforced concrete building is a normal temperature environment.

The invention can quantitatively calculate the interval value of the equivalent thermal resistance of thermal radiation blocking thermal radiation under the steady-state condition of the thermal insulation coating for buildings, and calculates the equivalent thermal resistance of the thermal insulation coating according to the equivalent thermal resistance and the principle of the thermal insulation coating. The interval value of thermal conductivity, according to the equivalent thermal resistance, each user unit and quality inspection agency can distinguish the authenticity and pros and cons of the thermal insulation coating. In this way, the inspection and supervision department also has the basis for inspection and supervision, and the architectural designers also have the basis for building energy-saving design.

Through further improvement, the present invention has higher detection accuracy than the prior art, and the detection simulated environment is closer to the real environment of use, and is more in line with the use scene of the paint, so the detection data is more reasonable and effective. In the present invention, by performing constant temperature treatment on the heat source, the time limit of the experimental detection is longer, so the detection data is more accurate.

The present invention adopts a temperature-controllable constant heat source, so that the continuous test time is longer, and at the same time, the internal temperature is stable, and no temperature fluctuation will affect the test effect, thereby further improving the test accuracy.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is a structural schematic diagram of the detection part in the reinforced concrete room in the present invention.

Fig. 2 is a schematic diagram of a detection structure for detection by applying thermal insulation paint.

Figure 3 is a structural schematic diagram of installing the insulation board for detection.

Fig. 4 is the temperature test figure that the present invention carries out under constant temperature condition; Under setting constant temperature temperature (heating water tank temperature is 85 ℃ ± 1 ℃) condition, the top floor average temperature curve of two rooms.

Fig. 5 is the temperature test chart that the present invention carries out under natural conditions, the top floor average temperature curve of two rooms.

Fig. 6 is the actual test temperature relation table that adopts two box body tests in the prior art (incubator A and B represent two box bodies in the figure, can find out from temperature at the same time, under the same environment, two There are still differences in the test temperature of the box, which will affect the accuracy of the final calculated equivalent thermal resistance).

Fig. 7 is to adopt the device of the present invention to test temperature table twice.

The labels in the figure are: 1. Heating tube high temperature line; 2. Constant temperature control line; 3. Constant temperature switch; 4. Electric meter; 5. Temperature sensor; 6. Temperature recorder; 7. Control box; 8. Temperature thermocouple line ;9. Power cord; 10. Power switch; 11. Thermocouple; 12. Thermal insulation coating; 13. Reinforced concrete wall; 14. Thermocouple installation wooden bracket; 15. Stainless steel box; 16. Boiling water; 17. Heating Tube; 18. Insulation board.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them . Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Accordingly, the detailed description of the embodiments of the invention provided below is not intended to limit the scope of the claimed invention but is merely representative of selected embodiments of the invention.

Example

As shown in Figures 1, 2, and 3: a device for steady-state detection of the equivalent thermal resistance and equivalent thermal conductivity interval value of thermal insulation coatings, which includes a reinforced concrete room and a device for detecting the temperature inside the reinforced concrete room Detection equipment, the structure of the detection equipment is shown in Figure 1. The reinforced concrete room is a closed structure, and the detection equipment is installed in the reinforced concrete room and connected with the external control box 7 . Reinforced concrete houses are mainly used to apply thermal insulation coatings and thermal insulation boards for comparative testing.

The reinforced concrete house is composed of its reinforced concrete wall by pouring reinforced cement concrete. The reinforced concrete room is composed of 6 surfaces, one of which is a door, the door is an insulation board with a thickness greater than or equal to 40mm, and the thickness of the remaining reinforced concrete walls 13 is greater than or equal to 60mm. Wherein the control box 7 is equipped with a thermostatic switch 3, a temperature recorder 6 and an ammeter 4, and is connected with a power switch 10 by a power cord 9, and the power switch 10 is convenient for manual operation during detection.

Wherein detection equipment has included thermocouple installation wooden support 14, thermocouple 11 and stainless steel box body 15, and thermocouple installation wooden support 14 lower end is the framework corresponding with the shape of stainless steel box body and is slightly larger than stainless steel box body, and thermocouple installation wooden support 14. A support for installing thermocouples is arranged above. During installation, the thermocouple installation wooden support 14 is covered on the stainless steel box body 15, and the thermocouple 11 is installed on the support on the thermocouple installation wooden support 14 above the stainless steel box body 15, and the thermocouple 11 passes through the temperature thermocouple line 8 and the outside of the concrete room The temperature recorder 6 is connected. Boiling water 16 is contained in the stainless steel box 15, and a temperature sensor 5 and a heating pipe 17 are installed in the boiling water 16. The temperature sensor 5 is connected to the constant temperature switch 3 outside the concrete room through a constant temperature control line 2, and the heating pipe 17 is passed through the high temperature line of the heating pipe. 1. Connect with the thermostatic switch 3 outside the concrete room. When the temperature is lower or higher than the preset temperature value, the temperature control switch controls the heating tube to heat or stop heating. In the present invention, the ratio of the boiling water volume in the stainless steel box to the space volume in the concrete room is 1:18-20, and the space volume in the concrete room is not less than 0.1m3. In this embodiment, the heat source is boiling water or constant temperature water, and the boiling water (constant temperature water) is placed in the center of the concrete room, and the boiling water (constant temperature water) is placed in a stainless steel heat container that can be sealed in the room.

A method for steady-state detection of equivalent thermal resistance and equivalent thermal conductivity of thermal insulation coatings, comprising the following steps:

a. The reinforced concrete room is tested twice. In the first test, thermal insulation paint is painted on the outer wall of the reinforced concrete room and the outside of the insulation board door. In the second test, a certain thickness of insulation board is pasted outside the cement room. The comparison method For detection and analysis, the steps of the two tests are the same;

b. Place a heating water tank with a certain capacity in the first cement room, install the data collector, and start heating after injecting water. After the water temperature reaches the set constant temperature, adjust the thermostat switch to keep the constant temperature at the same temperature. Stainless steel and The heater in the center is connected with the electric meter, and the data collector is connected with the temperature recorder;

c. Start testing after the equipment installation is completed, record the temperature in the reinforced concrete cement room, record it no less than 1 minute, and set the time interval value for the detection time (not less than 24 hours); The average temperature in the room > the average temperature in the room with thermal insulation board) and (power consumption in the room with thermal insulation coating < power consumption in the room with thermal insulation board), then the equivalent of building thermal insulation coating can be obtained by calculation Thermal resistance and equivalent thermal conductivity.

The temperature of the room under test at the beginning of the first test is consistent with the temperature of the constant temperature laboratory during the test. At the beginning of the second test, the temperature of the measured room is consistent with that of the constant temperature laboratory at 25°C.

During the testing process: for the first test, paint the thermal insulation paint on the surface of the outer wall of the reinforced concrete room, scrape off the thermal insulation paint after the first test, and then paste a certain thickness of thermal insulation board. The interval is not less than 48 hours. After cooling, the second test is carried out when the room temperature is consistent with the temperature of the constant temperature laboratory; in the second test, a certain thickness of insulation board is attached to the surface of the outer wall of the reinforced concrete room.

When calculating, the equivalent thermal resistance and equivalent thermal conductivity are calculated as follows:

Equivalent thermal resistance:

Let the reinforced concrete cement wall room tested for the first time be room A, and the reinforced concrete cement wall room tested for the second time be room B;

Set the paint thickness to 0.0003m, and record n times in the reinforced concrete room of the two tests at the same time, and record once every L minutes (seconds). are all M; then the following results can be obtained:

in: is the average temperature of the temperature of the i-th M test points in the room space of the first test;

is the average temperature of the temperature of the jth M test points in the room space of the second test;

It is the average temperature of n tests of the temperature of M measuring points in the space of the first test room;

It is the average temperature of n tests of the temperature of M measuring points in the space of the second test room;

AT _is the temperature of the i-th measuring point in the room space of the first test;

BT _jr is the temperature of the j-th measurement point in the room space of the first test;

D _A is the power consumption degree of the room within the time T of the first test;

D _B is the power consumption of the room within the time T of the second test.

Principle: In a constant temperature (same temperature) laboratory room, when the power consumption of the tested room is low in the two tests, the space temperature of the tested room is high, and the thermal resistance of the wall system of the tested room is large.

Calculation method of equivalent thermal resistance and equivalent thermal conductivity:

According to the inverse ratio between thermal resistance and thermal conductivity, there are:

When the power consumption temperature of the meter is D _A ≤ D _B

When coating the equivalent thermal resistance R _A of the thermal insulation coating; the thermal resistance R of the reinforced concrete wall; the thermal resistance R _B of the insulation board

According to the test temperature, if D _A ≤ D _B . Then there is R+R _{A coating} ≥ R+R _{B insulation board} ;

Thus, the equivalent thermal resistance interval value of thermal insulation coating is obtained: R _{A coating} ≥ R _{B insulation board}

Interval value of equivalent thermal conductivity of coating:

if D _A ≥ D _B means R+R _{A paint} ≤ R _B + R;

Thus, the equivalent thermal resistance interval value of thermal insulation coating is obtained: R _{A coating} < R _{B insulation board}

Interval value of equivalent thermal conductivity of coating:

The thermal conductivity of the reinforced concrete wall is R

In the formula: R _A coating is the equivalent thermal resistance of building thermal insulation (thermal insulation) coating;

R is the thermal resistance of the thick reinforced concrete wall:

S _A is the thickness of the reinforced concrete wall room;

λ _A coating is the equivalent thermal conductivity of the thermal insulation coating for building a group;

R _B is the thermal resistance of the insulation board.

In order to further test the test method of the present invention, first test the temperature in a constant temperature environment, and then control the temperature of the constant temperature water in the stainless steel box at 85°C ± 1°C (close to the temperature of the heating pipe wall in winter), and the room No. Plastic panels (thermal conductivity 0.33), No. 1 room is a 20mm thick reinforced concrete room; No. 2 room is also a 20mm thick reinforced concrete room, and then coated with thermal insulation paint. The test was conducted for 24 hours and the data was collected every 30 minutes. The results are shown in Figure 4. From this, the temperature in the room detected by the test device can be used to calculate the thermal insulation coating according to the temperature value and the known extruded board parameters. equivalent thermal resistance, etc.

The present invention is tested under natural conditions, and No. 1 room is a 30mm extruded board (thermal conductivity 0.33), and No. 1 room is a 20mm thick reinforced concrete room; No. 2 room also adopts a 20mm thick reinforced concrete room, and then Apply thermal insulation paint. The test was conducted for 24 hours, and the data was collected every 30 minutes. The results are shown in Figure 5. Therefore, the temperature in the room detected by the detection device can be used, and then the equivalent thermal resistance of the thermal insulation coating can be calculated according to the temperature value and the known parameters of the extruded board.

At the same time, it can be found that under constant temperature conditions, the parameters of the tested thermal insulation coating are more stable, so the calculated data are more accurate.

The equipment of the present invention comprises heat source and reinforced concrete wall room (wall thickness >= 60mm) and electric meter, and described cement wall room comprises reinforced concrete wall room, and described heat source is that stainless steel box is installed in the center position in cement wall room, and described reinforcing bar The concrete wall room is also equipped with a heat source box, a constant temperature probe and a temperature thermocouple data collector; the detection method adopts the sequential comparison test method. In the first test, the thermal insulation paint was painted on the outer wall surface of the reinforced concrete wall house, and the thermal insulation spacer paint on the outer surface of the reinforced concrete house was scraped off after the first test. Cool for no less than 48 hours (when the room temperature is consistent with the laboratory temperature) for the second test; in the second test, a certain thickness of insulation material board is attached to the outer surface of the reinforced concrete wall, and the two test times are x hours (but not less than 24 hours). The room space temperature recorder is used for two tests to record the space temperature in the room and the heater in the room at different times during the test. Connect an electric meter (power consumption of the heating tube) to record the power consumption value of the heater within the test period, and pass the room test twice. The comparison of the average temperature and the power consumption can calculate the interval value of the equivalent thermal resistance and the interval value of the equivalent thermal conductivity. The invention can quantitatively calculate the interval value of the equivalent thermal resistance of thermal radiation blocking thermal radiation under the steady-state condition of the thermal insulation coating for buildings, and calculates the equivalent thermal resistance of the thermal insulation coating according to the equivalent thermal resistance and the principle of the thermal insulation coating. The interval value of thermal conductivity, according to the equivalent thermal resistance, each user unit and quality inspection agency can distinguish the authenticity and pros and cons of the thermal insulation coating. In this way, the inspection and supervision department also has the basis for inspection and supervision, and the architectural designers also have the basis for building energy-saving design.

As shown in Figures 6 and 7, Figure 6 is the temperature test carried out by the equipment in the background technology. It can be seen from the figure that under the same environment and the same heat source, the average temperature in the two boxes of A and B was tested for 55 minutes. The difference reaches 0.9°C, so the accuracy of the final calculated thermal conductivity will be affected.

Figure 7 intercepts the detection data of the first 7 hours. The equipment of the present invention is used for two detections. One is to smear thermal insulation materials, and the other is to attach thermal insulation boards. The average temperature difference of the detected temperatures is only 0.5°C. The temperature difference is almost doubled, the individual test time can be 2 days, the total time is 4 days, and the water temperature is consistent. The test electricity on both sides is 8 degrees and 9 degrees, so it also saves energy.

It can be seen from the above two experimental diagrams that the test accuracy of the present application is higher than that of the prior art, and at the same time, the sustainable test time is longer.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

The above are only preferred implementations of the present invention, and it should be noted that the above preferred implementations should not be regarded as limiting the present invention, and the scope of protection of the present invention should be based on the scope defined in the claims. For those skilled in the art, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (10)

1. the equipment for detecting the interval value of equivalent thermal resistance and equivalent thermal conductivity of the heat-insulating coating in a steady state is characterized in that: including the coating carrier and install heat source, mounting bracket and the data collection station in the coating carrier, data collection station installs on the mounting bracket and is located the coating carrier, and data collection station passes through the outer record appearance of cable junction coating carrier, install heating device and temperature sensor in the heat source, heating device and temperature sensor pass through the cable and are connected with the outer control box of coating carrier.

2. The device for detecting the interval value of the equivalent thermal resistance and the equivalent thermal conductivity of the thermal insulation coating in a steady state according to claim 1, is characterized in that: the coating carrier is a sealed reinforced concrete house, and a reinforced concrete wall body of the coating carrier is formed by pouring reinforced concrete.

3. The device for detecting the interval value of the equivalent thermal resistance and the equivalent thermal conductivity of the thermal insulation coating in a steady state according to claim 2, characterized in that: the reinforced concrete house is composed of 6 faces, one face of the reinforced concrete house is a door, the thickness of the door is more than or equal to 40mm, and the thickness of the rest reinforced concrete walls is more than or equal to 60 mm.

4. The device for detecting the interval value of the equivalent thermal resistance and the equivalent thermal conductivity of the thermal insulation coating in a steady state according to claim 1, is characterized in that: and a constant temperature switch, a recorder and an ammeter are arranged in the control box.

5. The apparatus for steady-state detection of equivalent thermal resistance and equivalent thermal conductivity interval value of thermal insulation coating according to any one of claims 1-4, wherein: the heat source mainly comprises a stainless steel box body, boiling water or constant temperature water and a heating pipe, wherein the boiling water or the constant temperature water is contained in the stainless steel box body, and the heating pipe is arranged in the stainless steel box body.

6. the device for detecting the interval value of the equivalent thermal resistance and the equivalent thermal conductivity of the thermal insulation coating in a steady state according to claim 5, characterized in that: the mounting bracket is a wooden frame which covers the stainless steel box body, and the data collector is positioned in a paint carrier space above the stainless steel box body.

7. The apparatus for steady-state detection of equivalent thermal resistance and equivalent thermal conductivity interval value of thermal insulation coating according to claim 6, wherein: the data collector is a thermocouple, and the recorder is a temperature recorder.

8. The apparatus for steady-state detection of equivalent thermal resistance and equivalent thermal conductivity interval value of thermal insulation coating according to claim 7, wherein: the space in the coating carrier is more than or equal to 0.1 cubic meter, and the ratio of the volume of the constant-temperature water or boiling water in the heat source to the size of the space in the coating carrier is 1: 18-20.

9. A method for detecting interval values of equivalent thermal resistance and equivalent thermal conductivity of a heat-insulating coating in a steady state is characterized by comprising the following steps:

a. The reinforced concrete house is tested in two times, the first test is to brush heat-insulating coating on the outer wall of the reinforced concrete house and the outer side of a heat-insulating plate door, the second test is to paste a heat-insulating plate with a certain thickness outside the reinforced concrete house, a comparison method is used for detection and analysis, and the operation steps of the two tests are the same;

b. Placing a heating water tank with a certain volume in a first reinforced concrete room, installing a data collector, injecting water, then starting heating, adjusting a constant temperature switch to keep constant temperature to the same temperature after the water temperature is increased to a set constant temperature, connecting a heater in a stainless steel box body with an ammeter, and connecting the data collector with a temperature recorder;

c. after the equipment is installed, starting detection, recording the temperature in the reinforced concrete house, recording the temperature once in at least more than or equal to 1 minute, and setting a time interval value for detection time to be more than or equal to 24 hours; if the detection data indicates that the average temperature in the room coated with the heat-insulating coating is higher than the average temperature in the room attached with the heat-insulating plate, and the power consumption in the room coated with the heat-insulating coating is lower than the power consumption in the room attached with the heat-insulating plate, the detection is finished, and then the equivalent thermal resistance and the equivalent thermal conductivity coefficient of the building heat-insulating coating are obtained through calculation.

10. The method for stably detecting the interval value of the equivalent thermal resistance and the equivalent thermal conductivity coefficient of the thermal insulation coating according to claim 9, wherein the thermal insulation coating is coated on the surface of the outer wall of the reinforced concrete room in the first test, the thermal insulation coating is scraped off after the first test, then the thermal insulation plate with a certain thickness is attached, the interval is not less than 48 hours, and the second test is carried out when the room temperature is consistent with the temperature of a constant temperature laboratory after cooling; and in the second test, the insulation board with a certain thickness is attached to the surface of the outer wall of the reinforced concrete room.