A method and structure for repairing a cold bridge at a connection of an original building wall of an elevator shaft

Abstract

The application discloses a kind of elevator shaft original building wall connecting place cold bridge repair method and structure, it is related to building construction technical field, including determining the physical boundary of cold bridge repair operation;Based on the geometric form of original wall heat preservation layer and connecting piece, generate repair parameter;According to repair parameter, prefabricate repair structure and utilize forming tool to cut the connecting edge of original wall heat preservation layer, so that it forms the nonlinear labyrinth slot opening matched with parameter;Repair structure is embedded in nonlinear labyrinth slot opening, then foamed heat preservation filling material is injected, utilizes foaming expansion pressure to force repair structure flange and slot opening closely adhere, complete the steps such as adaptive sealing and cold bridge repair of connecting place, the present application determines the physical boundary of cold bridge repair operation and calculates repair parameter, simultaneously using matched heat preservation structure to repair, effectively solve the existing elevator shaft original building wall connecting place cold problem.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a method and structure for repairing cold bridges at the connection points of original building walls in elevator shafts. Background Technology

[0002] With the acceleration of urban renewal in my country, installing elevators in existing old residential buildings has become an important public welfare project to improve residents' quality of life. Since old buildings were not designed with elevator shafts in mind, the usual method for installation is to add steel structure shafts to the exterior of the building. However, in actual engineering practice, there are significant technical bottlenecks in the connection area between the elevator shaft and the original building walls, mainly in the following aspects:

[0003] First, there is the serious problem of structural thermal bridging. Traditional elevator shafts often use rigid steel frames, which frequently disrupt the continuity of the original exterior wall insulation layer when connecting to the existing building walls. The metal components at the connection points (such as anchors and connecting beams) have extremely high thermal conductivity, forming typical "thermal bridges." In winter, a large amount of indoor heat is lost through these connections; in summer, external heat rapidly penetrates. This heat leakage not only leads to a surge in energy consumption in the elevator area, but more seriously, the inner surface temperature of the thermal bridge area is often lower than the ambient dew point temperature, inducing condensation, mold, and mildew growth on the walls, severely impacting the living environment and the building's structural lifespan.

[0004] Secondly, the sealing reliability of the connection between the old and new surfaces is poor. After years of use, the original building walls often exhibit issues such as surface flatness deviations and vertical inaccuracies. Current insulation methods mostly involve on-site cutting and assembling rigid insulation boards, supplemented by manual caulking. Because the joints are straight and difficult to perfectly fit with irregular old walls, micro-gaps are unavoidable due to limitations in construction precision. Under the influence of thermal stress, wind loads, or elevator vibrations, these joints are prone to cracking, creating convective cold bridges and significantly degrading the overall insulation performance.

[0005] Therefore, how to provide a solution for repairing cold bridges in elevator shafts that can effectively block conductive and radiative heat flow is a technical problem that urgently needs to be solved in the field of urban renewal. Summary of the Invention

[0006] This invention provides a method and structure for repairing cold bridges at the connection between the original building walls and elevator shafts. By determining the physical boundaries of the cold bridge repair work and calculating the repair parameters, and by using a matching insulation structure for repair, the cold problem at the connection between the original building walls and elevator shafts is effectively solved.

[0007] A method for repairing cold bridges at the connection points of original building walls in elevator shafts includes the following steps:

[0008] Identify areas of abnormal heat flow at the connection between the elevator shaft and the original building wall, and determine the physical boundaries of the cold bridge repair work by combining environmental dew point data;

[0009] Obtain the thickness and material data of the original wall insulation layer, and calculate and generate repair parameters based on the geometry of the connectors. These parameters include at least the non-linear labyrinthine groove trajectory of the insulation layer edge, the dimensions of the repair structure, and the appropriate expansion ratio of the foamed insulation filling material.

[0010] Based on the repair parameters, a prefabricated repair structure is constructed and the connecting edges of the original wall insulation layer are cut using forming tools to create a non-linear labyrinth groove that matches the parameters.

[0011] The repair structure is embedded in the nonlinear labyrinth groove, and then foamed insulation material is injected. The expansion pressure of the foam forces the flange of the repair structure to fit tightly with the groove, thus completing the adaptive sealing and cold bridge repair at the connection.

[0012] Furthermore, the process of determining the physical boundaries of cold bridge repair work includes:

[0013] Under a set temperature difference environment, an infrared thermal imager is used to perform a panoramic scan of the connection area between the connector and the original building wall to obtain a surface temperature distribution map.

[0014] Areas where the difference between the surface temperature and the average temperature of the surrounding main wall surface is greater than the thermal bridge anomaly threshold are marked as Level 1 thermal bridge anomaly areas.

[0015] Real-time collection of air temperature and relative humidity in the working environment; calculation of the current dew point temperature; if there are points in the connected area with surface temperatures lower than the dew point temperature, they are marked as Level II high-risk condensation areas.

[0016] The primary thermal bridge abnormality zone and the secondary high-risk condensation zone are spatially superimposed to form a core repair zone. A buffer zone of a predetermined width is extended outward from the edge of this core repair zone to form the physical boundary of the final cold bridge repair operation.

[0017] Furthermore, the connectors located within the physical boundary of the cold bridge repair operation are defined as connectors with cold bridge anomalies.

[0018] Furthermore, the width of the buffer strip ranges from 50mm to 100mm.

[0019] Furthermore, the process of determining the nonlinear labyrinthine grooving trajectory at the edge of the insulation layer includes: measuring the effective thickness of the original wall insulation layer, setting the number of steps and the depth of each step of the labyrinth groove according to the thickness, wherein the total path length of the groove is set to be greater than or equal to 1.5 times the effective thickness of the original wall insulation layer.

[0020] A cold bridge repair structure for the connection between the original building wall and the elevator shaft includes an insulation structure, wherein a gap is provided between the insulation structure and the insulation layer, the wall and the connector, and a foamed insulation filling material is filled in the gap.

[0021] Furthermore, the appropriate expansion ratio of the foamed insulation filler material is determined based on the volume of the gap, including the following steps:

[0022] Calculate the volume of the gap, and based on the volume, calculate the injection volume of the foamed insulation filling material and the target expansion ratio;

[0023] By controlling the product relationship between the injection volume and the target expansion ratio, the expansion pressure generated by the material during the curing process is kept within the preset expansion pressure threshold range.

[0024] Furthermore, the lower limit of the expansion pressure threshold is used to ensure that the foamed insulation filler material completely fills the gap during the expansion process to eliminate convective cold bridges; the upper limit of the expansion pressure threshold is used to limit the extrusion force generated by the insulation structure on the insulation layer to prevent plastic failure or shear peeling of the geometry of the nonlinear labyrinth groove.

[0025] Furthermore, the insulation structure includes a fitted insulation component installed on the connecting beam of the connector. The fitted insulation component has gaps between itself and the insulation layer, the wall, and the connector. These gaps include a first channel formed between the fitted insulation component and the insulation structure, a second channel formed between the fitted insulation component and the connecting beam, and a third channel formed between the fitted insulation component and the mounting plate and anchor bolts of the connector.

[0026] Furthermore, a second reflective layer is provided on the surface of the insulation layer and the surface of the insulation structure, so that the second reflective layer covers the exposed gap and forms an overlapping sealed area.

[0027] The beneficial effects of the above-described technical solutions provided in the embodiments of the present invention include at least the following:

[0028] 1. By setting a nonlinear labyrinthine slotting trajectory, the traditional straight-line seam between new and old parts is transformed into a tortuous geometric locking structure, which significantly extends the path of heat flow and air convection. The path length effectively offsets the risk of interface cracking caused by elevator operation vibration or environmental stress, ensuring the long-term airtightness and thermal resistance stability of the connection.

[0029] 2. By spatially overlaying infrared thermal images with environmental dew point data, the physical boundaries containing hidden condensation risks can be accurately defined. Combined with a buffer zone of preset width, condensation, mold, and mildew on the walls at the cold bridge locations are eliminated, effectively protecting the structural safety of existing buildings.

[0030] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0031] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0033] Figure 1 This is a flowchart of a method for repairing cold bridges at the connection between the original building wall and the elevator shaft, as disclosed in an embodiment of the present invention.

[0034] Figure 2 This is a schematic diagram of the structure in step S3 of the present invention, which involves cutting the connecting edge of the original wall insulation layer to form a nonlinear labyrinth groove that matches the parameters.

[0035] Figure 3 This is a schematic diagram of the structure after the repair structure is embedded in the nonlinear labyrinth slot in step S4 of the present invention.

[0036] Figure 4 This is a schematic cross-sectional view of the repair structure after the installation of the second reflective layer and its integration with the wall, as disclosed in an embodiment of the present invention.

[0037] Figure 5 for Figure 4 A magnified schematic diagram of the central part of the structure.

[0038] Figure label:

[0039] 1. Wall; 2. Insulation layer; 21. First tongue and groove joint; 3. Connector; 31. Mounting plate; 32. Anchor bolt; 33. Connecting beam; 4. Insulation structure; 41. Fitting insulation component; 411. Second tongue and groove joint; 412. Through hole; 413. Receiving groove; 414. First side surface; 415. Second side surface; 42. First annular connector; 421. First through hole; 43. Second annular connector; 431. Second through hole; 44. Reinforcing rib; 45. First channel; 46. Second channel; 47. Third channel; 48. First reflective layer; 49. Second reflective layer; 5. Foamed insulation filling material. Detailed Implementation

[0040] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0041] Figure 4 and Figure 5 This diagram illustrates a structure for repairing cold bridges at the connection point of the original building wall 1 in an elevator shaft. The repair structure includes an insulation structure 4 and a foamed insulation filler material 5. A gap is provided between the insulation structure 4 and the insulation layer 2, the wall 1, and the connector 3. This gap is filled with the foamed insulation filler material 5 to connect the insulation structure 4 to the insulation layer 2, the wall 1, and the connector 3.

[0042] 1. Achieve adaptive flexible sealing between the old and new interfaces: Utilize the foamed thermal insulation filling material 5 to penetrate into the micro-uneven surface of the nonlinear labyrinth groove to compensate for the unevenness of the original wall surface 1 and eliminate the micro-cavities caused by mechanical construction errors.

[0043] 2. Construct a multi-dimensional heat flow blocking barrier: By forming a continuous low thermal conductivity filling layer in the gap, the high thermal conductivity components such as the mounting plate 31 and anchor bolts 32 of the connector 3 are completely wrapped, cutting off the conductive heat bridge and suppressing air convection in the gap.

[0044] 3. Establish a dynamic stress buffer and load transfer mechanism: During elevator operation vibration or temperature difference deformation, the micro-elasticity of the foamed insulation filling material 5 is used to absorb the interfacial shear stress, preventing rigid collision or cracking and peeling between the insulation structure 4 and the original wall 1.

[0045] like Figure 5 As shown, considering that the connector 3 has been pre-anchored to the original building wall 1, the insulation structure 4 in this scheme is designed as a two-part splice. The splice joint also adopts a non-linear labyrinth groove. On the construction site, the workers do not need to disassemble the connecting beam 33. They can fasten the two-part components to the connecting beam 33 from both sides. Specifically, the insulation structure 4 includes a fitted insulation component 41, which is installed on the connecting beam 33 of the connector 3. After being installed on the connecting beam 33 of the connector 3, the splice surface is connected and fixed using foamed insulation filling material 5. Mechanical buckles can also be set on the splice surface, such as matching elastic tongues and grooves. After splicing and fastening, the mechanical structure is used for self-locking. Alternatively, a combination of mechanical self-locking and foamed insulation filling material 5 can be used for splicing and fixing.

[0046] like Figure 4 and 5As shown, there are gaps between the inlaid insulation component 41 and the insulation layer 2, the wall 1 and the connector 3. These gaps include a first channel 45 formed between the inlaid insulation component 41 and the insulation structure 4, a second channel 46 formed between the inlaid insulation component 41 and the connecting beam 33, and a third channel 47 formed between the inlaid insulation component 41 and the mounting plate 31 and anchor bolt 32 of the connector 3. The first channel 45, the second channel 46 and the third channel 47 are interconnected to form the gaps between the inlaid insulation component 41 and the insulation layer 2, the wall 1 and the connector 3. The inlaid insulation component 41 is also provided with crisscrossing reinforcing ribs 44 to improve the deformation resistance of the inlaid insulation component 41.

[0047] The side of the inlaid insulation component 41 closest to the insulation layer 2, the wall 1, the anchor bolts 32, and the mounting plate 31 is defined as the second side 415. The side of the inlaid insulation component 41 closest to the connecting beam 33 is also defined as the second side 415. The second side 415 is provided with a second stepped tongue and groove at the position where it matches the insulation layer 2 (repair structure flange). Correspondingly, the insulation layer 2 is provided with a first stepped tongue and groove at the position where it matches the second side 415. There is a gap between the first stepped tongue and groove and the second stepped tongue and groove, which forms a first channel 45.

[0048] The second side 415 has a receiving groove 413 on the side near the anchor bolt 32 and the mounting plate 31 to accommodate the anchor bolt 32. The inlay insulation component 41 is provided with a through hole 412. Using the through hole 412, the two halves of the inlay insulation component 41 fasten the connecting beam 33 inside. During the installation process, the position of the inlay insulation component 41 is adjusted so that the anchor bolt 32 does not contact the inner wall of the receiving groove 413. The second side 415 near the anchor bolt 32 and the mounting plate 31 forms a third channel 47 between the mounting plate 31 and the anchor bolt 32 of the connector 3.

[0049] To enhance the stability of the receiving groove 413, a second annular connector 43 is provided inside the receiving groove 413. The second annular connector 43 is provided with a second through hole 431 for the foamed insulation filling material 5 to flow.

[0050] The second side 415 forms a second channel 46 with the connecting beam 33 on the side closest to the connecting beam 33. In order to enhance the stability of the second channel 46, a first annular connector 42 is provided in the second channel 46. It should be noted that the first annular connector 42 is also a two-half splicing structure. The through hole in the middle allows the connecting beam 33 to pass through. A first through hole 421 is provided on the edge surface that is off from the middle through hole for the foamed insulation filling material 5 to flow.

[0051] Furthermore, in order to improve the deformation resistance of the inlaid insulation component 41, crisscrossing reinforcing ribs 44 are provided inside the inlaid insulation component 41.

[0052] To further improve the thermal insulation performance of the insulation structure 4, a first reflective layer 48 is provided on the inlaid insulation component 41 near the gap and the insulation layer 2 to reflect heat radiation and improve the thermal insulation performance.

[0053] The thermal insulation structure 4, the foamed thermal insulation filling material 5, the first reflective layer 48, and the second reflective layer 49 all have a certain degree of ductility, which can adapt to the deformation changes caused by temperature difference stress, wind load, or elevator operation vibration.

[0054] The implementation process of this invention will now be described in conjunction with the above-mentioned repair structure:

[0055] like Figure 1 As shown, a method for repairing cold bridges at the connection of the original building wall 1 in an elevator shaft is disclosed, including the following steps:

[0056] S1 identifies the abnormal heat flow area at the connection between the elevator shaft and the original building wall 1, and determines the physical boundary of the cold bridge repair operation by combining environmental dew point data.

[0057] The process of determining the physical boundaries of cold bridge repair work includes:

[0058] S11, in the set temperature difference environment (indoor and outdoor temperature difference) Under these conditions, an infrared thermal imager is used to perform a panoramic scan of the area where the connector 3 connects to the original building wall 1 to obtain a surface temperature distribution map.

[0059] S12 marks areas where the difference between the surface temperature and the average temperature of the surrounding main wall surface is greater than the thermal bridge anomaly threshold as first-level thermal bridge anomaly areas.

[0060] The specific process is as follows: The infrared thermal imager acquires a photo containing the connector 3 and the surrounding large area of ​​normal wall 1. A standard wall area far away from the connector 3 is selected, and the average temperature of the pixels in the area is calculated. The real-time temperature of each point in the connector 3 area is subtracted from this average temperature. If the difference exceeds a set limit (thermal bridge abnormality threshold), it indicates that the thermal performance of the point has significantly deviated from the normal building envelope and there is structural heat leakage.

[0061] S13 collects the air temperature and relative humidity of the working environment in real time, calculates the current dew point temperature, and marks any point in the connected area with a surface temperature lower than the dew point temperature as a level 2 high-risk condensation zone.

[0062] Using the existing Magnus formula to calculate dew point temperature, for example:

[0063]

[0064] Among them, auxiliary function Defined as:

[0065]

[0066] In the formula: This refers to the dew point temperature. Relative humidity; The ambient air temperature; It is a constant; in one example, , .

[0067] If a certain point Surface temperature If the value is 0, it is determined to be the absolute dew point.

[0068] S14, the first-level thermal bridge abnormal area and the second-level high-risk condensation area are spatially superimposed to form a core repair area, and a buffer zone of a preset width is extended outward from the edge of the core repair area. The width of the buffer zone is 50mm~100mm, which constitutes the physical boundary of the final cold bridge repair operation. The connector 3 located within the physical boundary of the cold bridge repair operation is defined as a connector 3 with a cold bridge abnormality.

[0069] S2, obtain the thickness and material data of the original wall 1 insulation layer 2, and calculate and generate repair parameters in combination with the geometric shape of the connector 3. These parameters include at least the non-linear labyrinthine groove trajectory of the edge of the insulation layer 2, the size of the repair structure, and the matching expansion ratio of the foamed insulation filling material 5.

[0070] S22, the process of determining the nonlinear labyrinthine grooving trajectory of the edge of the insulation layer 2 includes: measuring the effective thickness of the insulation layer 2 of the original wall 1, setting the number of steps of the labyrinth groove and the depth of each step according to the thickness, wherein the total path length of the groove is set to be greater than or equal to 1.5 times the effective thickness of the insulation layer 2 of the original wall 1.

[0071] Specifically, the total path length of the groove is the cross-sectional path of the non-linear labyrinthine groove, referring to the shortest geometric path length from the edge of the original wall 1 insulation layer 2, undulating along the stepped shape, until it passes through the entire repair interface. The total path length of the groove... .

[0072]

[0073] In the formula, This represents the total path length of the slot. The effective thickness of the original wall insulation layer 2 is 1. For the first The height of the stepped structure along the main direction of heat conduction (usually perpendicular to the wall). The sum of the longitudinal displacements of all steps is numerically equal to the total thickness of insulation layer 2. , For the first The depth of the stepped section is parallel to the direction of wall 1 (or perpendicular to the main heat transfer direction). The additional path length added to the maze trajectory compared to the traditional straight-line gaps. For step-level numbers, For a certain step (from step 1 to step 2) class).

[0074] Single-level height The process of determining is as follows:

[0075] ,in,

[0076] Single-stage depth The process of determining is as follows:

[0077] The dimensions of each step are determined by its vertical height. and lateral depth Definition, to ensure heat flow path length Achieve the effective thickness of the original wall insulation layer 1. 1.5 times or more of the setting At least for .

[0078] Depth of a single step It should be controlled within to The design balances thermal resistance and structural strength.

[0079] S23, the appropriate expansion ratio of the foamed insulation filling material 5 is determined based on the volume of the gap, including the following steps:

[0080] Calculate the volume of the gap, and based on the volume, calculate the injection volume and target expansion ratio of the foamed insulation filling material 5;

[0081] By controlling the product relationship between the injection volume and the target expansion ratio, the expansion pressure generated by the material during the curing process is kept within the preset expansion pressure threshold range.

[0082] The lower limit of the expansion pressure threshold is used to ensure that the foamed insulation filler material 5 completely fills the gap during the expansion process to eliminate convection cold bridges; the upper limit of the expansion pressure threshold is used to limit the extrusion force generated by the insulation structure 4 on the insulation layer 2 to prevent plastic damage or shear peeling of the geometry of the nonlinear labyrinth groove.

[0083] To prevent excessive foaming pressure from damaging the insulation layer 2, the injection volume is calculated using existing formulas. In the formula, This refers to the injection volume; This represents the total volume of the gap; Set the target fill density; The foam insulation filler material has a free foaming ratio of 5. This is the actual limited foaming ratio (target expansion ratio). The overflow loss coefficient (usually taken as 0.05~0.1) is used to control the expansion pressure. At the expansion pressure threshold Internally, control the ratio of actual foaming ratio to free foaming ratio. ,when At that time, suppressive pressure is generated, and the injection volume is controlled to... Maintaining it in the range of 0.7 to 0.9 ensures both the filling of micropores (adaptive sealing) and the prevention of structural expansion and cracking.

[0084] S3, based on the repair parameters, prefabricate the repair structure and use forming tools to cut the connecting edges of the original wall 1 and insulation layer 2, forming a non-linear labyrinth groove that matches the parameters, such as... Figure 2 As shown.

[0085] S4. The repair structure is embedded into the nonlinear labyrinth groove, and then foamed insulation filler material 5 is injected. The foamed insulation filler material 5 can flow freely in the gaps (first channel 45, second channel 46, third channel 47). The expansion pressure of the foam forces the flange of the repair structure to fit tightly with the groove, completing the adaptive sealing and cold bridge repair at the connection. Tools can also be used to press the embedded insulation component 41 against the wall until the foamed insulation filler material 5 has fully expanded to prevent displacement and achieve a tight fit with the insulation layer 2. Figure 3 As shown.

[0086] like Figures 3-5 As shown, after the repair structure is connected to the insulation layer 2, the surfaces of the repair structure and the insulation layer 2 are cleaned, and a second reflective layer 49 is provided on the surface of the insulation layer 2 and the surface of the insulation structure 4. The second reflective layer 49 covers the exposed gap and forms an overlapping sealing area. The second reflective layer 49 is used to reflect heat radiation and improve the insulation performance.

[0087] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process may be rearranged without departing from the scope of this disclosure. The appended method claims provide elements of various steps in an exemplary order and are not intended to limit the scope to the specific order or hierarchy described.

[0088] In the detailed description above, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features in a single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of the invention.

[0089] Those skilled in the art will also understand that the various illustrative logic blocks, modules, circuits, and algorithm steps described in conjunction with the embodiments herein can be implemented as electronic hardware, computer software, or a combination thereof. To clearly illustrate the interchangeability between hardware and software, the various illustrative components, blocks, modules, circuits, and steps described above are generally described in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system. Those skilled in the art can implement the described functionality in alternative ways for each specific application; however, such implementation decisions should not be construed as departing from the scope of this disclosure.

[0090] The steps of the methods or algorithms described in conjunction with the embodiments herein can be directly embodied in hardware, software modules executed by a processor, or a combination thereof. The software modules can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium well known in the art. An exemplary storage medium is connected to the processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. The ASIC can reside in a user terminal. Alternatively, the processor and storage medium can exist as discrete components in the user terminal.

[0091] For software implementation, the techniques described in this application can be implemented using modules (e.g., procedures, functions, etc.) that perform the functions described in this application. This software code can be stored in memory units and executed by a processor. The memory units can be implemented within the processor or outside the processor; in the latter case, they are communicatively coupled to the processor via various means, as is well known in the art.

[0092] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that the various embodiments can be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

Claims

1. A method for repairing cold bridges at the connection points of original building walls in elevator shafts, characterized in that, Includes the following steps: Identify areas of abnormal heat flow at the connection between the elevator shaft and the original building wall, and determine the physical boundaries of the cold bridge repair work by combining environmental dew point data; Obtain the thickness and material data of the original wall insulation layer, and calculate and generate repair parameters based on the geometry of the connectors. These parameters include at least the non-linear labyrinthine groove trajectory of the insulation layer edge, the dimensions of the repair structure, and the appropriate expansion ratio of the foamed insulation filling material. Based on the repair parameters, a prefabricated repair structure is constructed and the connecting edges of the original wall insulation layer are cut using forming tools to create a non-linear labyrinth groove that matches the parameters. The repair structure is embedded in the nonlinear labyrinth groove, and then foamed insulation material is injected. The expansion pressure of the foam forces the flange of the repair structure to fit tightly with the groove, thus completing the adaptive sealing and cold bridge repair at the connection.

2. The method as described in claim 1, characterized in that, The process of determining the physical boundaries of cold bridge repair work includes: Under a set temperature difference environment, an infrared thermal imager is used to perform a panoramic scan of the connection area between the connector and the original building wall to obtain a surface temperature distribution map. Areas where the difference between the surface temperature and the average temperature of the surrounding main wall surface is greater than the thermal bridge anomaly threshold are marked as Level 1 thermal bridge anomaly areas. Real-time collection of air temperature and relative humidity in the working environment; calculation of the current dew point temperature; if there are points in the connected area with surface temperatures lower than the dew point temperature, they are marked as Level II high-risk condensation areas. The primary thermal bridge abnormality zone and the secondary high-risk condensation zone are spatially superimposed to form a core repair zone. A buffer zone of a predetermined width is extended outward from the edge of this core repair zone to form the physical boundary of the final cold bridge repair operation.

3. The method as described in claim 2, characterized in that, Connectors located within the physical boundary of the cold bridge repair operation are defined as connectors with cold bridge anomalies.

4. The method as described in claim 2, characterized in that, The width of the buffer strip ranges from 50mm to 100mm.

5. The method as described in claim 1, characterized in that, The process of determining the nonlinear labyrinthine grooving trajectory at the edge of the insulation layer includes: measuring the effective thickness of the original wall insulation layer, setting the number of steps and the depth of each step of the labyrinth groove according to the thickness, wherein the total path length of the groove is set to be greater than or equal to 1.5 times the effective thickness of the original wall insulation layer.

6. A structure for repairing cold bridges at the connection between the original building wall and the elevator shaft, using the method described in claim 1, characterized in that, It includes an insulation structure, wherein gaps are provided between the insulation structure and the insulation layer, the wall and the connectors, and foamed insulation filling material is filled in the gaps.

7. The structure as described in claim 6, characterized in that, The appropriate expansion ratio of the foamed insulation filling material is determined based on the volume of the gap, including the following steps: Calculate the volume of the gap, and based on the volume, calculate the injection volume of the foamed insulation filling material and the target expansion ratio; By controlling the product relationship between the injection volume and the target expansion ratio, the expansion pressure generated by the material during the curing process is kept within the preset expansion pressure threshold range.

8. The structure as described in claim 7, characterized in that, The lower limit of the expansion pressure threshold is used to ensure that the foamed insulation filler material completely fills the gap during the expansion process to eliminate convection cold bridges; the upper limit of the expansion pressure threshold is used to limit the extrusion force generated by the insulation structure on the insulation layer to prevent plastic failure or shear peeling of the geometry of the nonlinear labyrinth groove.

9. The structure as described in claim 6, characterized in that, The thermal insulation structure includes a fitted thermal insulation component, which is installed on the connecting beam of the connector. There are gaps between the fitted thermal insulation component and the insulation layer, the wall and the connector. These gaps include a first channel formed between the fitted thermal insulation component and the thermal insulation structure, a second channel formed between the fitted thermal insulation component and the connecting beam and a third channel formed between the fitted thermal insulation component and the mounting plate and anchor bolts of the connector.

10. The structure as described in claim 9, characterized in that, A second reflective layer is provided on the surface of the insulation layer and the surface of the insulation structure, so that the second reflective layer covers the exposed gap and forms an overlapping sealed area.

Images