CN-121994869-A - Thermotechnical defect diagnosis system and method for elevator installation area of existing building

CN121994869ACN 121994869 ACN121994869 ACN 121994869ACN-121994869-A

Abstract

A thermal defect diagnosis system and method for the existing building elevator installation area relates to the technical field of thermal defect diagnosis, and comprises a visual twin control terminal and a thermal-cold double-loop heat exchanger which are connected with the visual twin control terminal in a communication way, wherein the visual twin control terminal is suitable for generating thermal-cold energy and cold energy according to instructions of the visual twin control terminal, at least one heat exchange module is respectively connected with the thermal-cold double-loop heat exchanger through a circulation pipeline a or a circulation pipeline b to form a thermal energy or cold energy loop, the invention can realize the purpose of automatically analyzing the positions of a thermal bridge and a cold bridge to judge whether the construction has thermal defects or not by applying controllable heat energy or cold energy to an elevator installation area of an inner wall and collecting and analyzing the thermal response data at the corresponding position of the outer wall.

Inventors

Peng Longfan
Fu Hongzhe
LI LIULIAN
PING YANG
XIE HAO

Assignees

中国建筑第二工程局有限公司

Dates

Publication Date: 20260508
Application Date: 20260122

Claims (10)

1. A system for diagnosing thermal defects in an existing building elevator installation area, comprising: the visual twin control terminal is configured to construct a corresponding digital twin model based on parameters of a building and an elevator, and determine the positions of a data acquisition point and a temperature change loading area on the wall in a wall body based on the digital twin model; the heat-cold double-loop heat exchanger is in communication connection with the visual twin control terminal and is suitable for generating heat, cold and cold energy according to the instruction of the visual twin control terminal; At least one heat exchange module is connected with the hot and cold double-loop heat exchanger through a circulating pipeline a or a circulating pipeline b to form a heat energy or cold energy loop respectively, and thermally exciting the temperature change loading area; the detection equipment is suitable for acquiring thermal response data at the building outer wall based on the data acquisition points; The visual twin control terminal is also used for determining the space acquisition position of the detection equipment, controlling the operation of the heat-cold double-loop heat exchanger and the detection equipment, identifying and diagnosing the thermal defects on the thermal response data, and acquiring the position of the heat exchange module to detect the installation position of the heat exchange module.
2. The diagnostic system of claim 1, wherein the visual twinning control terminal comprises a control unit, a display unit communicatively connected to the control unit, a depth camera b, and an inertial measurement unit b.
3. The diagnostic system of claim 2 wherein the heat exchange module comprises a thermally insulated housing having an interior cavity with a heat exchanger c disposed therein, a thermally conductive plate a disposed at an opening of the interior cavity and in close thermal communication with the heat exchanger c for thermally energizing the temperature change loading zone.
4. A diagnostic system as claimed in claim 3, wherein the heat-cold dual-circuit heat exchanger comprises a semiconductor heat pump module having a cold end and a hot end, at which there are provided corresponding pump-type circulation assemblies a and b, which are connected to the heat exchanger c by circulation lines a and b, respectively, for thermal circulation.
5. The diagnostic system of claim 4 wherein the semiconductor heat pump module comprises a semiconductor refrigeration sheet and heat exchangers a and b thermally coupled to the cold and hot ends of the semiconductor refrigeration sheet, the heat exchanger a being in communication with the heat exchanger c through a circulation line a while providing a pump cycle assembly a on the line for a first thermal cycle or in communication with the heat exchanger c through a circulation line b while providing a pump cycle assembly b on the line for a second thermal cycle.
6. The diagnostic system of claim 5, wherein a temperature sensor a is provided on the first thermal cycle line and a temperature sensor b is provided on the second thermal cycle line, and the pump cycle assembly a, the pump cycle assembly b, the semiconductor refrigeration sheet, the temperature sensor a, and the temperature sensor b are communicatively coupled to the control unit, respectively.
7. The diagnostic system of claim 3 further comprising a bracket including a base, the top of the base being hinged with a damping telescoping frame, a damping telescoping rod being hinged between a section of the damping telescoping frame adjacent to the base and the base, an end of another section of the damping telescoping frame being detachably hinged with a side of the insulating housing remote from the thermally conductive plate a.
8. The diagnostic system of claim 2, wherein the detection device comprises a mobile carrier on which the depth camera a, the inertial measurement unit a and the infrared imaging sensor are mounted, the mobile carrier, the depth camera a, the inertial measurement unit a and the infrared imaging sensor being in communication with the control unit, respectively.
9. A method for diagnosing thermal defects in an existing building elevator installation area, applied to the diagnosis system of claim 1, comprising the steps of: the visual twin control terminal builds a digital twin model based on the data of the building structure and the elevator structural members; determining the positions of a plurality of temperature change loading areas on the inner wall to be detected and the detection points of corresponding detection equipment based on the digital twin model; The visual twin control terminal divides a plurality of temperature change loading areas into a heating group and a refrigerating group based on the wall temperature, and generates an execution flow; Based on the execution flow, a worker acquires the installation position of the heat exchange module through the visual twin control terminal, installs the heat exchange module at the position of the corresponding heating group or refrigerating group, and identifies and prompts the installation position in the installation process by the visual twin control terminal until the installation position coincides with the installation position; The visual twin control terminal controls the heat and cold double-loop heat exchanger to transmit heat energy and cold energy to the corresponding heat exchange module to thermally excite the inner wall; After the temperature loading is finished, the visual twin control terminal controls the detection equipment to move to a detection point, the corresponding outer wall area performs thermal response data acquisition, and the data is transmitted back to the visual twin control terminal; and the visual twin control terminal identifies the positions of defects of the thermal bridge or the cold bridge of the wall body according to the returned heat transfer data.
10. The diagnostic method of claim 9, further comprising determining a spatial location point on the wall based on the digital twin model, wherein a location marker is provided on the spatial location point, wherein the visual twin control terminal and the detection device can determine a spatial location in the digital twin model based on the location marker.

Description

Thermotechnical defect diagnosis system and method for elevator installation area of existing building Technical Field The invention relates to the technical field of thermal defect diagnosis, in particular to a thermal defect diagnosis system and method for an existing building elevator installation area. Background Along with the acceleration of the urban process, a large number of existing buildings are in need of modification and elevator installation. The elevator installs regional local transformation or with new structural component's of original building structure wall body of being usually involved, thereby can unavoidable destroy original insulation construction in the transformation process and cause serious thermal engineering problem: 1. the structural heat bridge is formed by forming a cold bridge (or a heat bridge) at the joint of the elevator shaft and the existing wall body, so that a great amount of indoor heat is dissipated in winter, dew condensation and mildew are generated at the joint, and outdoor heat is permeated in summer, so that the load of the air conditioner is increased. 2. The research shows that the energy loss caused by the heat bridge of the elevator installation area can even offset 15-25% of the finished external heat insulation energy saving reconstruction. 3. The hidden trouble of construction quality is outstanding, in site construction, the thermal insulation material needs to be manually cut and spliced at the joint, the sealing performance is poor, and the gaps are more, so that the problem of heat defect is further aggravated. The existing detection mode generally uses devices such as a thermal infrared imager to detect the heat flow distribution of a wall body to identify a cold bridge (or a thermal bridge), but the detection mode depends on the difference between the external environment temperature and the indoor environment temperature, so that the detection process has larger limitation and the accuracy is intersected, and therefore, a detection method capable of accurately evaluating the thermal performance of an elevator installation area, positioning the thermal bridge/the cold bridge area and judging whether the construction has defects is needed. Disclosure of Invention The embodiment of the invention provides a thermal defect diagnosis system and a thermal defect diagnosis method for an elevator installation area of an existing building, wherein the detection purpose of automatically analyzing the positions of a thermal bridge and a cold bridge to judge whether the thermal defect exists in construction can be realized by applying controllable heat energy or cold energy to the elevator installation area of an inner wall and collecting thermal response data at the corresponding position of an outer wall for analysis. A thermal defect diagnosis system for an existing building elevator installation area comprises the following steps: the visual twin control terminal is configured to construct a corresponding digital twin model based on parameters of a building and an elevator, and determine the positions of a data acquisition point and a temperature change loading area on the wall in a wall body based on the digital twin model; the heat-cold double-loop heat exchanger is in communication connection with the visual twin control terminal and is suitable for generating heat, cold and cold energy according to the instruction of the visual twin control terminal; At least one heat exchange module is connected with the hot and cold double-loop heat exchanger through a circulating pipeline a or a circulating pipeline b to form a heat energy or cold energy loop respectively, and thermally exciting the temperature change loading area; the detection equipment is suitable for acquiring thermal response data at the building outer wall based on the data acquisition points; The visual twin control terminal is also used for determining the space acquisition position of the detection equipment, controlling the operation of the heat-cold double-loop heat exchanger and the detection equipment, identifying and diagnosing the thermal defects on the thermal response data, and acquiring the position of the heat exchange module to detect the installation position of the heat exchange module. Further, the visual twin control terminal comprises a control unit, a display unit, a depth camera b and an inertial measurement unit b which are in communication connection with the control unit. Further, the heat exchange module comprises a heat insulation shell with an inner concave cavity part, a heat exchanger c is arranged in the inner concave cavity part, and a heat conducting plate a is arranged at the opening of the inner concave cavity part and forms tight thermal coupling with the heat exchanger c so as to thermally excite the temperature change loading area. Further, the heat-cold double-loop heat exchanger comprises a semiconductor heat pump module, wherein the semiconductor heat