阅读说明：本技术 一种建筑围护结构传热系数测定装置及方法 (Building envelope heat transfer coefficient measuring device and method ) 是由 林少芳 陈善宁 丁大 蓝学威 于 2021-08-11 设计创作，主要内容包括：本发明公开了一种建筑围护结构传热系数测定装置及方法,其包括包括热箱、用于控制热箱温度的温度控制器、若干个分别用于检测建筑围护结构内外两侧温度的温度传感器、用于收集温度数据的数据采集分析仪器以及抽气机；所述热箱外周固定套设有吸附板,所述吸附板的吸附面与热箱的检测面平齐,所述吸附板的吸附面开设有吸附腔,所述吸附腔环绕于热箱的检测面周侧；所述抽气机与所述吸附腔连通,所述抽气机用于将吸附腔内的气体抽出。本发明具有降低对围护结构表面造成损害程度的效果。(The invention discloses a device and a method for measuring heat transfer coefficient of a building envelope structure, which comprises a hot box, a temperature controller for controlling the temperature of the hot box, a plurality of temperature sensors for detecting the temperature of the inner side and the outer side of the building envelope structure respectively, a data acquisition and analysis instrument for collecting temperature data and an air extractor; the periphery of the hot box is fixedly sleeved with an adsorption plate, the adsorption surface of the adsorption plate is flush with the detection surface of the hot box, the adsorption surface of the adsorption plate is provided with an adsorption cavity, and the adsorption cavity surrounds the periphery of the detection surface of the hot box; the air pump is communicated with the adsorption cavity and used for pumping out gas in the adsorption cavity. The invention has the effect of reducing the damage degree to the surface of the building envelope.)

1. A heat transfer coefficient measuring device for a building envelope structure is characterized in that: the system comprises a hot box (2), a temperature controller (6) for controlling the temperature of the hot box (2), a plurality of temperature sensors (3) for detecting the temperature of the inner side and the outer side of a building envelope (1), a data acquisition and analysis instrument for collecting temperature data and an air extractor (5); an adsorption plate (21) is fixedly sleeved on the periphery of the hot box (2), the adsorption surface of the adsorption plate (21) is flush with the detection surface of the hot box (2), an adsorption cavity (23) is formed in the adsorption surface of the adsorption plate (21), and the adsorption cavity (23) surrounds the periphery of the detection surface of the hot box (2); the air extractor (5) is communicated with the adsorption cavity (23), and the air extractor (5) is used for extracting air in the adsorption cavity (23).

2. The apparatus of claim 1, wherein the apparatus further comprises: the adsorption surface of the adsorption plate (21) is provided with two rubber rings (22), and the two rubber rings (22) are respectively arranged around the outer ring edge of the opening of the adsorption cavity (23) and the inner ring edge of the opening of the adsorption cavity (23).

3. The apparatus of claim 1, wherein the apparatus further comprises: the heat transfer coefficient measuring device for the building envelope (1) further comprises a containing box (4), wherein the containing box (4) is used for containing and storing the hot box (2), the temperature sensor (3), the data acquisition and analysis instrument and the air extractor (5).

4. A building envelope heat transfer coefficient measuring device of claim 3, wherein: containing box (4) upper end opening, containing box (4) opening edge articulates there is closing cap (41), closing cap (41) are used for switching containing box (4) opening, the bottom wall is provided with a plurality of support columns (421) perpendicularly in containing box (4), works as when closing cap (41) seals containing box (4) opening, a plurality of support column (421) support closing cap (41) inboard.

5. The apparatus of claim 4, wherein the heat transfer coefficient of the building envelope is determined by: the supporting columns (421) enclose a plurality of storage positions (43) in the storage box (4), and the storage positions (43) are respectively used for storing the hot box (2), the temperature sensor (3), the air pump (5) and the data acquisition and analysis instrument.

6. The apparatus of claim 4, wherein the heat transfer coefficient of the building envelope is determined by: holding tank (424) have been seted up to support column (421) peripheral surface, holding tank (424) spiral coils to the other end of support column (421) from the one end of support column (421).

7. The apparatus of claim 4, wherein the heat transfer coefficient of the building envelope is determined by: a plurality of first threaded holes (44) which are uniformly distributed are formed in the inner bottom wall of the containing box (4), a threaded head (422) is arranged at one end of the supporting column (421), and the supporting column (421) and the containing box (4) are fixedly connected through the threaded connection of the threaded head (422) and the threaded holes; second screw hole (423) have been seted up to the one end that screw thread head (422) was kept away from in support column (421), when carrying out heat transfer coefficient and detecting, it is a plurality of support column (421) end to end group becomes bracing piece (42), and is adjacent realize fixedly through screw thread head (422) and second screw hole (423) threaded connection between support column (421), bracing piece (42) upper end supports containing box (4) downside.

8. A method for determining a heat transfer coefficient of a building envelope according to any one of claims 1 to 7, comprising: the method comprises the following steps:

s1: detection preparation: attaching a temperature sensor (3) positioned on the detection surface of the hot box (2) to the outer side of the building envelope (1), and attaching the temperature sensor (3) independent of the outside of the hot box (2) to the inner side of the building envelope (1);

s2: and (3) hot box installation: attaching the adsorption surface of the adsorption plate (21) to the outer side of the building envelope (1); then starting the air pump (5), pumping the air in the adsorption cavity (23) out by the air pump (5), and forcing the hot box (2) to be tightly adsorbed at the outer side of the building envelope structure (1);

s3: connecting an instrument: the output ends of the temperature sensors (3) are connected to the input end of the data acquisition and analysis instrument through electric wires (9), and the temperature controller (6) is connected to the hot box (2) through the electric wires (9);

s4: and (3) measuring the heat transfer coefficient: and starting the temperature controller (6), driving the hot box (2) to heat the outer side of the building envelope structure (1), inputting a signal of the temperature sensor (3) into a data acquisition and analysis instrument, and processing and analyzing the data by the data acquisition and analysis instrument to obtain an experimental result.

Technical Field

The invention relates to the technical field of thermal detection instruments, in particular to a device and a method for determining heat transfer coefficient of a building envelope structure.

Background

The heat preservation and insulation performance of the building enclosure structure is a main internal factor influencing the energy consumption of the building, the improvement of the heat preservation and insulation performance of the building enclosure structure is a key link for saving the energy consumption of heating and air conditioning, and the thermal performance of the building enclosure structure is also an important index for evaluating the energy consumption of the building.

In the correlation technique, the building envelope heat transfer coefficient on-site detection device is composed of 4 parts of a heat box for controlling the indoor test environment of a building, a heat flow temperature sensor, a temperature controller and a data acquisition and analysis instrument, wherein the heat box is made of aluminum alloy, the interior of the heat box is insulated by using an insulation material, an electric heating belt is arranged in the heat box, the temperature in the heat box is controlled by a temperature controller, if thousands of low-power axial fans and aluminum soaking plates are arranged in the heat box, the temperature in the box is even through the operation of the fans, meanwhile, the soaking plates can enable the wall surface of the envelope to be uniformly heated, and can prevent the axial fans from influencing the temperature and the heat flow sensor during the operation, and a heat flow meter is arranged in the heat box and used for measuring the heat flow density. 4 fixing lugs are welded on the box body and fixed on the enclosure structure through expansion screws, and heat-preservation sealing rubber strips are attached to the periphery of the box body to prevent heat leakage of the contact part of the box body and the enclosure structure.

In conclusion, the expansion screws are used for fixing the hot box on the building envelope, so that holes are easily formed in the surface of the building envelope, the surface of the building envelope is damaged, and the improvement space is provided.

Disclosure of Invention

The invention provides a device and a method for measuring a heat transfer coefficient of a building envelope structure, aiming at reducing the damage degree to the surface of the envelope structure.

The invention provides a device and a method for measuring heat transfer coefficient of a building envelope structure, which adopt the following technical scheme:

a heat transfer coefficient measuring device for a building envelope structure comprises a hot box, a temperature controller for controlling the temperature of the hot box, a plurality of temperature sensors for detecting the temperature of the inner side and the outer side of the building envelope structure respectively, a data acquisition and analysis instrument for collecting temperature data and an air extractor; the periphery of the hot box is fixedly sleeved with an adsorption plate, the adsorption surface of the adsorption plate is flush with the detection surface of the hot box, the adsorption surface of the adsorption plate is provided with an adsorption cavity, and the adsorption cavity surrounds the periphery of the detection surface of the hot box; the air pump is communicated with the adsorption cavity and used for pumping out gas in the adsorption cavity.

The air in the adsorption cavity is pumped out by the air pump, so that the adsorption cavity is in a vacuum state, the adsorption plate is tightly adsorbed on the outer side of the building envelope, the purpose of fixing the hot box is achieved, the use of expansion screws is avoided, and the damage degree to the surface of the envelope is favorably reduced.

Preferably, the adsorption surface of the adsorption plate is provided with two rubber rings, and the two rubber rings respectively surround the outer ring edge of the adsorption cavity opening and the inner ring edge of the adsorption cavity opening.

Through adopting above-mentioned technical scheme, after the air in the absorption chamber is taken out, the adsorption plate tightly adsorbs in the building envelope outside to force the rubber circle to compress tightly the building envelope outside, two rubber circles play double-deck guard action, are favorable to reducing the heat and scatter and disappear.

Preferably, the building envelope heat transfer coefficient measuring device further comprises a containing box, and the containing box is used for containing and storing the hot box, the temperature controller, the data acquisition and analysis instrument and the air extractor.

Because the number of related instruments for measuring the heat transfer coefficient is large, the related instruments are stored together, and the occurrence of equipment omission is favorably reduced.

Preferably, containing box upper end opening, containing box opening edge hinge have the closing cap, the closing cap is used for the switching containing box opening, the bottom wall is provided with a plurality of support columns perpendicularly in the containing box, works as when the closing cap seals containing box opening, a plurality of the support column supports the closing cap inboard.

Through adopting above-mentioned technical scheme, the support column provides the holding power for the closing cap, is favorable to reducing the probability that the closing cap pressurized deformation.

Preferably, a plurality of storage positions are formed by the support columns in the containing box, and the storage positions are respectively used for storing the hot box, the temperature controller, the air extractor and the data acquisition and analysis instrument.

Through adopting above-mentioned technical scheme, the support column plays limiting displacement to each equipment, is favorable to preventing the condition that takes place to shift when the transportation, avoids equipment to take place to collide each other.

Preferably, the holding tank has been seted up to the support column periphery, the holding tank spirals from the one end of support column to the other end of support column.

Through adopting above-mentioned technical scheme, because the instrument electric wire is more, appear intertwine's problem during depositing easily, when accomodating the electric wire, the electric wire can twine at support column periphery side to inlay the both ends of electric wire in the holding tank, avoid each group electric wire loose and intertwine's the condition.

Preferably, a plurality of first threaded holes are uniformly distributed in the bottom wall of the containing box, a threaded head is arranged at one end of the supporting column, and the supporting column and the containing box are fixedly connected through threads of the threaded heads and the threaded holes; the support column is kept away from the one end of screw thread head and is seted up the second screw hole, when carrying out coefficient of heat transfer and examine time measuring, and is a plurality of the support column end to end constitutes the bracing piece, and is adjacent realize fixedly through screw thread head and second screw hole threaded connection between the support column, the bracing piece upper end supports the containing box downside.

Through adopting above-mentioned technical scheme, operating personnel can be according to detecting highly deciding the bracing piece length, and the bracing piece provides the holding power for the hot box below the hot box, is favorable to improving the hot box steadiness.

A method for measuring a heat transfer coefficient of a building envelope structure comprises the following steps:

s1: detection preparation: attaching a temperature sensor positioned on the detection surface of the hot box to the outer side of the building envelope structure, and attaching a temperature sensor independent from the outside of the hot box to the inner side of the building envelope structure;

s2: and (3) hot box installation: attaching the rubber ring of the adsorption surface of the adsorption plate to the outer side of the building envelope; starting an air extractor, extracting air in the adsorption cavity by the air extractor, and forcing the hot box to be tightly adsorbed on the outer side of the building envelope;

s3: connecting an instrument: the output ends of the temperature sensors are connected to the input end of the data acquisition and analysis instrument through electric wires, and the temperature controller is connected to the hot box through electric wires;

s4: and (3) measuring the heat transfer coefficient: and starting the temperature controller to drive the hot box to heat the outer side of the building envelope structure, inputting a signal of the temperature sensor into a data acquisition and analysis instrument, and processing and analyzing the data by the data acquisition and analysis instrument to obtain an experimental result.

By adopting the technical scheme, the gas in the adsorption cavity is pumped out by the air pump, so that the adsorption cavity is in a vacuum state, the adsorption plate is tightly adsorbed on the outer side of the building enclosure structure, the purpose of fixing the hot box is achieved, the use of expansion screws is avoided, and the damage degree to the surface of the enclosure structure is favorably reduced.

Drawings

Fig. 1 is a schematic diagram of a detection state of a heat transfer coefficient measuring device for a building envelope according to an embodiment of the present application.

Fig. 2 is a schematic view of a storage state of the heat transfer coefficient measuring device for the building envelope according to the embodiment of the present application.

Description of reference numerals: 1. building envelope; 2. a hot box; 21. an adsorption plate; 22. a rubber ring; 23. an adsorption chamber; 24. a heat flow meter; 25. a limiting hole; 3. a temperature sensor; 4. a storage box; 41. sealing the cover; 42. a support bar; 421. a support pillar; 422. a screw head; 423. a second threaded hole; 424. accommodating grooves; 43. a storage location; 44. a first threaded hole; 5. an air extractor; 51. a hose; 6. a temperature controller; 7. a temperature heat flow polling instrument; 8. a computer; 9. an electric wire.

Detailed Description

The present invention is described in further detail below with reference to FIGS. 1-2.

The embodiment of the invention discloses a device and a method for measuring heat transfer coefficient of a building envelope structure. Referring to fig. 1 and 2, the heat transfer coefficient measuring device for the building envelope structure comprises a hot box 2, a temperature controller 6, a plurality of temperature sensors 3, a data acquisition and analysis instrument, an air extractor 5 and a storage box 4, wherein the storage box 4 is used for storing the hot box 2, the temperature sensors 3, the data acquisition and analysis instrument and the air extractor 5.

The temperature controller 6 is connected to the hot box 2 through an electric wire 9 for controlling the temperature of the hot box 2. The temperature sensor 3 is specifically a surface-mounted temperature sensor 3, and the data acquisition and analysis instrument comprises a temperature heat flow polling instrument 7, a heat flow meter 24 installed in the heat box 2 and a computer 8. The output end of the heat flow meter 24 and the output ends of the temperature sensors 3 are connected to the input end of the temperature heat flow polling instrument 7 through wires 9, and the output end of the temperature heat flow polling instrument 7 is connected to the computer 8 through the wires 9. A part of the temperature sensor 3 is mounted on the detection surface of the hot box 2 and used for detecting the actual temperature of the hot box 2; the other part of the temperature sensor 3 is independent outside the hot box 2. The detection surface of the hot box 2 is arranged with an opening so as to directly transmit the heat to the building envelope 1. When detecting the heat transfer coefficient of the building envelope 1, an operator fixes the hot box 2 at the outer side of the building envelope 1, the temperature sensor 3 positioned on the detection surface of the hot box 2 is attached at the outer side of the building envelope 1, and the temperature sensor 3 independent of the outer side of the hot box 2 is attached at the inner side of the building envelope 1.

The upper end of the containing box 4 is open, the edge of the opening of the containing box 4 is hinged with a sealing cover 41, and the sealing cover 41 is used for opening and closing the opening of the containing box 4. First screw hole 44 that bottom wall opened has a plurality of evenly distributed in containing box 4, be provided with a plurality of support columns 421 in containing box 4, the bottom mounting of support columns 421 has screw head 422, it is fixed to realize through the threaded connection of screw head 422 with the screw hole between support columns 421 and the containing box 4, make screw column vertical fixation at the interior diapire of containing box 4, the top and the 4 opening edge of containing box of support columns 421 flush, when the opening of containing box 4 is sealed to closing cap 41, a plurality of support columns 421 support closing cap 41 inboardly, thereby provide the holding power for closing cap 41, prevent that closing cap 41 from receiving the compressive deformation.

When with equipment such as hot box 2, temperature sensor 3, when equipments such as air extractor 5 and data acquisition analytical instrument deposit in containing box 4, the accessible is threaded connection in the first screw hole 44 of each equipment week side respectively with the thread head 422 of a plurality of support columns 421, make a plurality of support columns 421 enclose into a plurality of positions 43 of depositing in containing box 4 is inside, a plurality of positions 43 of depositing are used for depositing hot box 2 respectively, temperature controller 6, air extractor 5 and data acquisition analytical instrument, support column 421 plays limiting displacement to each equipment, be favorable to preventing the condition that takes place the aversion when the transportation, avoid equipment to take place collision each other.

Holding tank 424 has been seted up to support column 421 outer peripheral face, and holding tank 424 spirals from the bottom of support column 421 to the top of support column 421, when accomodating electric wire 9, electric wire 9 can twine in support column 421 periphery side to inlay the both ends of electric wire 9 in holding tank 424, avoid each group's electric wire 9 loose and the condition of intertwine.

The fixed cover in hot box 2 periphery is equipped with adsorption plate 21, and adsorption plate 21's adsorption plane and hot box 2's detection face parallel and level, adsorption cavity 23 has been seted up to adsorption plate 21's adsorption plane, and adsorption cavity 23 surrounds in hot box 2's detection face week side. The adsorption surface of the adsorption plate 21 is bonded with two rubber rings 22, and the two rubber rings 22 are respectively arranged around the edge of the outer ring of the opening of the adsorption cavity 23 and the edge of the inner ring of the opening of the adsorption cavity 23. A hose 51 is communicated between the suction plate 21 and the air extractor 5, and the hose 51 is communicated with the suction chamber 23. When the heat transfer coefficient of the building envelope 1 is prepared for measurement, an operator attaches the temperature sensor 3 in the hot box 2 to the outer side of the building envelope 1, attaches the rubber ring 22 on the adsorption surface of the adsorption plate 21 to the outer side of the building envelope 1, then starts the air pump 5 to pump out air in the adsorption cavity 23, so that the hot box 2 is tightly adsorbed to the outer side of the building envelope 1, the damage to the surface of the envelope is favorably reduced, and the two rubber rings 22 play a role in double-layer protection and are favorable for reducing heat loss.

The top of support column 421 is opened has second screw hole 423, when detecting the preparation, in order to improve the steadiness of hot box 2, operating personnel is according to detecting the height, constitutes four independent bracing pieces 42 with a plurality of support columns 421, and four bracing pieces 42 provide the holding power for hot box 2 below hot box 2. In each supporting rod 42, the adjacent supporting columns 421 are fixed by the threaded heads 422 and the threaded holes 423. The lower side of the bottom of the hot box 2 is provided with four limiting holes 25, and the limiting holes 25 are used for the end parts of the supporting rods 42 to be spliced, so that the stability of the hot box 2 is improved. In addition, the electric wires 9 extending from the lower side of the hot box 2 can be coiled in the accommodating grooves 424 along the extending direction of the accommodating grooves 424 on the peripheral surface of the supporting column 421, which is beneficial to the collection and the arrangement of the electric wires 9 and avoids the mutual winding of the electric wires 9.

A method for measuring a heat transfer coefficient of a building envelope structure comprises the following steps:

s1: detection preparation:

an operator opens a sealing cover 41 of the containing box 4, the hot box 2 and the plurality of supporting columns 421 are taken out of the containing box 4, then the operator combines the plurality of supporting columns 421 into four independent supporting rods 42 according to the detection height, in each supporting rod 42, the adjacent supporting columns 421 are in threaded connection with the second threaded holes 423 through threaded heads 422 to realize fixation, the lower ends of the supporting rods 42 are in threaded connection with the containing box 4 through the threaded heads 422 and the first threaded holes 44 to realize fixation, the top ends of the four supporting rods 42 are respectively inserted into the four limiting holes 25 on the lower side of the hot box 2, and the four supporting rods 42 support the containing box 4; then the temperature sensor 3 positioned on the detection surface of the hot box 2 is attached to the outer side of the building envelope 1, and the temperature sensor 3 independent of the hot box 2 is attached to the inner side of the building envelope 1.

S2: and (3) hot box installation:

an operator moves the containing box 4 and attaches the rubber ring 22 of the adsorption surface of the adsorption plate 21 to the outer side of the building envelope 1; the air extractor 5 is then activated, the air extractor 5 extracts the air inside the suction cavity 23 and forces the hot box 2 to be tightly absorbed outside the building envelope 1, while the rubber ring 22 is compressed, thus forming a double barrier for hindering the heat dissipation.

S3: connecting an instrument:

the output end of the heat flow meter 24 and the output ends of the temperature sensors 3 are connected to the input end of the temperature heat flow polling instrument 7 through electric wires 9, the electric wires 9 are wound in the accommodating grooves 424 along the extending direction of the accommodating grooves 424 on the outer peripheral surface of the supporting column 421, and the output end of the temperature heat flow polling instrument 7 of the electric wires 9 is connected to the computer 8 through the electric wires 9; the temperature controller 6 is connected to the hot box 2 through an electric wire 9.

S4: and (3) measuring the heat transfer coefficient: the temperature controller 6 is started to drive the hot box 2 to heat the building envelope structure 1, the signals of the temperature sensor 3 and the heat flow meter 24 are input into the temperature heat flow polling instrument 7, the signals are input into the computer 8 by the polling instrument, and the computer 8 processes and analyzes the data to obtain an experimental result.

The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.