Sealing door device for testing overall airtightness of building
By using a nested design of concave and convex crossbeams and a combination of Z-shaped expansion airbags, along with replaceable nozzles and the main unit of the instrument, the problem of poor adaptability of traditional building air tightness testing devices is solved, achieving high-precision and high-efficiency air tightness assessment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENYANG GOLDEN TECH PRECISION INSTRUMENT & EQUIPMENT CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-01
AI Technical Summary
Traditional building air tightness testing devices are difficult to adapt to different building sizes and air leakage rates, resulting in low testing accuracy and low operating efficiency.
It adopts a nested design of concave and convex crossbeams, a combination of Z-shaped expansion airbags and L-shaped drainage channels, and a replaceable nozzle and instrument main unit to achieve intelligent inflation and deflation and airflow regulation, forming a three-dimensional sealing layer.
It improves detection accuracy by more than 40%, reduces manual intervention by 65%, adapts to buildings of different sizes and air leakage rates, and ensures airflow stability and detection accuracy.
Smart Images
Figure CN224189429U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building airtightness testing technology, specifically a sealing door device for testing the overall airtightness of a building. Background Technology
[0002] Under the influence of wind and thermal pressure, the airtightness of building windows directly affects their thermal insulation performance and heat loss due to cold air infiltration. Airtightness rating has become a key indicator for evaluating building energy efficiency. However, air infiltration is difficult to measure directly. Traditional methods indirectly detect it by maintaining constant indoor pressure to ensure the amount of leaked gas equals the flow rate of the airflow device. But this faces two major technical challenges in practice:
[0003] Insufficient size adaptability: Different buildings have doors of varying sizes, and traditional detection devices use a fixed frame sealing structure, making it difficult to adapt to diverse detection ports. Physical compression seals are prone to gaps due to size mismatches, leading to uncontrollable gas leakage paths and severely reducing detection accuracy.
[0004] Poor adaptability to dynamic air leakage: Building air leakage ranges widely (4000-11000 m³ / h), and traditional devices using single-specification nozzles cannot adjust the airflow field according to the leakage volume. When the actual air leakage exceeds the equipment's design range, turbulence interference easily occurs, leading to distorted test data. Furthermore, rigid sealing structures are prone to failure under wind pressure fluctuations or thermal expansion and contraction, requiring frequent manual adjustments and resulting in low operational efficiency. While existing technologies may already offer solutions to these problems, this invention aims to provide an alternative or replacement solution. Utility Model Content
[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a sealing door device for overall building airtightness testing, comprising: a cloth cover, an extended sealing structure, and a drainage structure, wherein the extended sealing structure includes: a pair of concave crossbeams, a pair of convex crossbeams, a pair of concave vertical frames, a pair of convex vertical frames, two pairs of snap-fit limiting blocks, two pairs of plum blossom knobs, two pairs of Z-shaped expansion airbags, two pairs of L-shaped connecting pipes, an air pump, and an air valve;
[0006] A pair of convex crossbeams are movably inserted into the inner side of a pair of concave crossbeams, a pair of convex vertical frames are movably inserted into the inner side of a pair of concave vertical frames, two pairs of snap-fit limiting blocks are respectively attached to the convex vertical frames, two pairs of plum blossom knobs are respectively installed on a pair of concave crossbeams and a pair of concave vertical frames, an L-shaped drainage groove is provided on a pair of concave crossbeams, a pair of convex crossbeams, a pair of telescopic concave vertical frames and a pair of convex vertical frames, two pairs of Z-shaped inflatable airbags are respectively installed on the inner side of four pairs of L-shaped drainage grooves, two pairs of L-shaped connecting pipes are respectively connected to two pairs of Z-shaped inflatable airbags, an inflation valve is connected to the Z-shaped inflatable airbag, and an inflation pump is connected to the inflation valve;
[0007] It should be noted that, in the above process, a pair of snap-fit limiting blocks are first placed at the bottom two corners of the detection port. Then, a convex crossbeam is horizontally extended and retracted stably inside a concave crossbeam. Simultaneously, through the horizontal extension and retraction of the convex and concave crossbeams, they are respectively inserted into the inner sides of the pair of snap-fit limiting blocks. Then, by rotating the plum blossom knob, compression and fixation are achieved, thereby limiting the convex crossbeam inside the concave crossbeam and preventing extension and retraction. Similarly, a pair of concave crossbeams, a pair of convex crossbeams, a pair of concave vertical frames, a pair of convex vertical frames, and two... The locking and limiting blocks are squeezed and expanded to fix them. Then, the inflation valve is inflated by an air pump. The air is guided to the inside of the Z-shaped expansion airbag through the inflation valve. The Z-shaped expansion airbag drives a pair of L-shaped connecting pipes on it. Through the inflation and expansion of the two pairs of Z-shaped expansion airbags and the two pairs of L-shaped connecting pipes, the pair of concave crossbeams, the pair of convex crossbeams, the pair of concave vertical frames, the pair of convex vertical frames, the two pairs of locking and limiting blocks and the detection port are expanded and sealed. The Z-shaped expansion airbags cooperate with the pair of L-shaped drainage grooves to achieve moving expansion and sealing.
[0008] Preferably, the drainage structure includes: a fan, an instrument main unit, a replaceable nozzle, multiple plungers, a horizontal rotation drive shaft, and a nine-corner cover plate;
[0009] The fan is mounted on the cloth cover, the replaceable nozzle is mounted on the fan, the multiple plungers are evenly and dynamically mounted on the replaceable nozzle, the horizontal rotation drive shaft is inserted into the replaceable nozzle, the nine-corner cover plate is mounted on the horizontal rotation drive shaft, and the main unit of the instrument is mounted on the concave crossbeam.
[0010] It should be noted that, as described above, a replaceable nozzle is installed at the air inlet of the fan during operation. Different types of replaceable nozzles have different throat flow rates. Since the air leakage rate varies in different buildings, different replaceable nozzles are selected for different buildings to ensure stable internal airflow. The main unit is mounted on the door frame using a mounting plate. The main unit has a display screen and control buttons. The main unit can be powered by an independent device and is installed with the replaceable nozzles via cables. The main unit can display the set parameters and test results, and can also control the rotation speed of the replaceable nozzles. Without replaceable nozzles, under natural conditions at 50Pa, the applicable airflow is 4000~11000m3 / h. By replacing different replaceable nozzles, different airflow velocities are generated for testing. The airflow is sealed by a horizontal rotating drive shaft and a nine-corner cover plate.
[0011] Preferably, the cloth cover is provided with multiple motor straps.
[0012] Preferably, each of the two pairs of L-shaped connecting pipes and the two pairs of Z-shaped inflatable airbags is provided with a sealing strip.
[0013] Preferably, each of the two pairs of Z-shaped inflatable airbags is equipped with a pressure sensor.
[0014] Preferably, the cloth cover is provided with a communication cable.
[0015] Beneficial effects
[0016] This utility model provides a sealing door device for testing the overall airtightness of a building. It offers the following advantages compared to existing technologies: It employs a nested design of concave-convex horizontal beams / vertical frames with a plum blossom-shaped knob locking mechanism, combined with the synergistic effect of a Z-shaped expansion airbag and an L-shaped drainage channel to form a three-dimensional sealing layer. The inflation system uses a pressure sensor for intelligent inflation and deflation control, ensuring uniform distribution of sealing pressure across the test port surface, adapting to the geometric deformation of different sized doorways, and eliminating the structural defects of traditional rigid seals. It features a unique combination of replaceable nozzles and plunger arrays, with the throat cross-sectional area adjusted via a 9-corner cover plate, and a horizontal rotating drive shaft enabling variable nozzle shapes. The instrument's main unit has preset five airflow modes from 4000-11000 m³ / h, automatically matching nozzle specifications based on building air leakage characteristics to ensure a laminar flow field under a 50 Pa pressure difference, minimizing airflow interference. The integrated main unit combines data acquisition, parameter setting, and status monitoring functions, and enables remote control via a communication cable. The fabric cover suspension system, combined with the motor-driven strap, allows for rapid deployment. The L-shaped connecting pipe and sealing strip provide secondary protection, improving overall testing accuracy by over 40% and reducing manual intervention by 65%. It is suitable for airtightness assessment of complex buildings. Attached Figure Description
[0017] Figure 1 This is a front view schematic diagram of a sealing door device for testing the overall airtightness of a building, as described in this utility model.
[0018] Figure 2 This is a top view schematic diagram of a sealing door device for testing the overall airtightness of a building, as described in this utility model.
[0019] In the diagram: 1. Fabric cover; 2. Concave crossbeam; 3. Convex crossbeam; 4. Concave vertical frame; 5. Convex vertical frame; 6. Fastening limit block; 7. Plum blossom knob; 8. Z-shaped expansion airbag; 9. L-shaped connecting pipe; 10. Fan; 11. Main unit of the instrument; 12. Replaceable nozzle; 13. Plunger. Detailed Implementation
[0020] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0021] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires. Appropriate controllers and encoders should be selected according to the actual situation to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical components are connected in sequence. The detailed connection methods are well-known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control further.
[0022] Example
[0023] The present invention will now be described in detail with reference to the accompanying drawings, such as... Figure 1-2As shown, the extended sealing structure includes: a pair of concave crossbeams 2, a pair of convex crossbeams 3, a pair of concave vertical frames 4, a pair of convex vertical frames 5, two pairs of locking and limiting blocks 6, two pairs of plum blossom knobs 7, two pairs of Z-shaped expansion airbags 8, two pairs of L-shaped connecting pipes 9, an air pump, and an air valve; the pair of convex crossbeams 3 are respectively movably inserted into the inner side of the pair of concave crossbeams 2, the pair of convex vertical frames 5 are respectively movably inserted into the inner side of the pair of concave vertical frames 4, and the two pairs of locking and limiting blocks 6 are respectively Connected to a pair of concave crossbeams 2, a pair of convex crossbeams 3, a pair of telescopic concave vertical frames 4, and a pair of convex vertical frames 5, two pairs of plum blossom knobs 7 are respectively installed on a pair of concave crossbeams 2 and a pair of concave vertical frames 4. L-shaped drainage grooves are formed on a pair of concave crossbeams 2, a pair of convex crossbeams 3, a pair of telescopic concave vertical frames 4, and a pair of convex vertical frames 5. Two pairs of Z-shaped inflatable airbags 8 are respectively installed on the inner sides of the four pairs of L-shaped drainage grooves. The L-shaped connecting pipe 9 is connected to two pairs of Z-shaped inflatable airbags 8, the inflation valve is connected to the Z-shaped inflatable airbags 8, and the inflation pump is connected to the inflation valve; the drainage structure includes: a fan 10, an instrument main unit 11, a replaceable nozzle 12, multiple plungers 13, a horizontal rotation drive shaft, and a nine-corner cover plate; the fan 10 is mounted on the cloth cover 1, the replaceable nozzle 12 is mounted on the fan 10, the multiple plungers 13 are evenly and movably mounted on the replaceable nozzle 12, the horizontal rotation drive shaft is inserted into the replaceable nozzle 12, the nine-corner cover plate is mounted on the horizontal rotation drive shaft, and the instrument main unit 11 is mounted on the concave crossbeam 2; multiple motor straps are provided on the cloth cover 1; sealing strips are provided on the two pairs of L-shaped connecting pipes 9 and the two pairs of Z-shaped inflatable airbags 8; pressure sensors are provided on the two pairs of Z-shaped inflatable airbags 8; and communication cables are provided on the cloth cover 1.
[0024] According to the appendix Figure 1-2The procedure involves first placing a pair of locking blocks 6 at the bottom corners of the detection port. Then, a convex crossbeam 3 is horizontally extended and retracted within a concave crossbeam 2. Simultaneously, the horizontal extension and retraction of the convex and concave crossbeams 3 and 2 are respectively inserted into the inner sides of the pair of locking blocks 6. Finally, rotating the plum blossom knob 7 achieves compression and fixation, thus limiting the convex crossbeam 3 within the concave crossbeam 2 and preventing further extension and retraction. Similarly, a pair of concave crossbeams 2, a pair of convex crossbeams 3, and a pair of concave crossbeams 6 are placed within the concave crossbeam 2. The vertical frame 4, a pair of convex vertical frames 5, and two pairs of snap-fit limiting blocks 6 are compressed and expanded for fixation. Then, an air pump inflates the inflation valve, directing the gas to the inside of the Z-shaped expansion airbag 8. The Z-shaped expansion airbag 8 drives a pair of L-shaped connecting pipes 9. The inflation of the two pairs of Z-shaped expansion airbags 8 and the two pairs of L-shaped connecting pipes 9 expands the pressure on the pair of concave crossbeams 2, a pair of convex crossbeams 3, a pair of concave vertical frames 4, a pair of convex vertical frames 5, and two pairs of snap-fit limiting blocks 6 at the detection port. The expansion seal is achieved through the cooperation of a Z-shaped expansion airbag 8 and a pair of L-shaped drainage grooves, thus enabling a movable expansion seal. A replaceable nozzle 12 is installed at the air inlet of the fan 10. Different types of replaceable nozzles 12 have different throat flow rates. Since the air leakage rate varies in different buildings, different replaceable nozzles 12 are selected for different buildings to ensure stable internal airflow. The main unit is mounted on the door frame using a mounting plate. The main unit has a display screen and control buttons. The main unit can be powered by an independent device and is installed with the replaceable nozzles 12 via a cable. The main unit can display the set parameters and test results, and can also control the rotation speed of the replaceable nozzles 12. Without replaceable nozzles 12, in a natural state at 50 Pa, the applicable airflow is 4000~11000m³ / h. By replacing different replaceable nozzles 12, different airflow velocities are generated for testing. The drainage is sealed by a horizontal rotating drive shaft and a nine-corner cover plate.
[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A sealing door device for testing the overall airtightness of a building, comprising: The cloth cover, the extended sealing structure, and the drainage structure are characterized in that the extended sealing structure includes: a pair of concave crossbeams, a pair of convex crossbeams, a pair of concave vertical frames, a pair of convex vertical frames, two pairs of snap-fit limiting blocks, two pairs of plum blossom knobs, two pairs of Z-shaped expansion airbags, two pairs of L-shaped connecting pipes, an air pump, and an air valve. A pair of convex crossbeams are movably inserted into the inner side of a pair of concave crossbeams, a pair of convex vertical frames are movably inserted into the inner side of a pair of concave vertical frames, two pairs of snap-fit limiting blocks are respectively connected to a pair of concave crossbeams, a pair of convex crossbeams, a pair of telescopic concave vertical frames, and a pair of convex vertical frames, two pairs of plum blossom knobs are respectively installed on a pair of concave crossbeams and a pair of concave vertical frames, L-shaped drainage grooves are provided on a pair of concave crossbeams, a pair of convex crossbeams, a pair of telescopic concave vertical frames, and a pair of convex vertical frames, two pairs of Z-shaped inflatable airbags are respectively installed inside the four pairs of L-shaped drainage grooves, two pairs of L-shaped connecting pipes are respectively connected to two pairs of Z-shaped inflatable airbags, the inflation valve is connected to the Z-shaped inflatable airbag, and the inflation pump is connected to the inflation valve.
2. The sealing door device for testing the overall airtightness of a building according to claim 1, characterized in that, The drainage structure includes: a fan, an instrument main unit, a replaceable nozzle, multiple plungers, a horizontal rotation drive shaft, and a nine-corner cover plate. The fan is mounted on the cloth cover, the replaceable nozzle is mounted on the fan, the multiple plungers are evenly and movably mounted on the replaceable nozzle, the horizontal rotation drive shaft is inserted into the replaceable nozzle, the nine-corner cover plate is mounted on the horizontal rotation drive shaft, and the instrument main unit is mounted on the concave crossbeam.
3. The sealing door device for testing the overall airtightness of a building according to claim 2, characterized in that, The cloth cover is equipped with multiple motor straps.
4. A sealing door device for testing the overall airtightness of a building according to claim 3, characterized in that, Each of the two pairs of L-shaped connecting pipes and the two pairs of Z-shaped inflatable airbags is provided with a sealing strip.
5. A sealing door device for testing the overall airtightness of a building according to claim 4, characterized in that, Pressure sensors are installed on each of the two pairs of Z-shaped inflatable airbags.
6. A sealing door device for testing the overall airtightness of a building according to claim 5, characterized in that, Communication cables are installed on the cloth cover.