Detection equipment suitable for detecting air leakage rate of air pipe

Abstract

The utility model provides detection equipment suitable for detecting the air leakage amount of an air pipe. The detection equipment comprises a control module, a fan, at least one pressure sensor and a static pressure ring, a manifold is arranged on the static pressure ring and used for being communicated with a detected air pipe, the static pressure ring is connected with the pressure sensor, the pressure sensor is integrated with a first wireless module, the first wireless module is electrically connected with the control module, and the control module is electrically connected with the fan. The fan is electrically connected with a differential pressure sensor, the differential pressure sensor is electrically connected with the control module, and the control module controls the fan to rotate clockwise or anticlockwise based on an instruction. According to the mode, an additional flexible air pipe is not needed to connect the fan and the measured air pipe, and the measurement precision is improved.

Description

Technical Field

[0001] This application relates to the field of testing technology, specifically to a testing device suitable for detecting air leakage in air ducts. Background Technology

[0002] Air ducts are a common material in engineering, used for the transport and distribution of air. The tightness / sealing performance of air ducts is a crucial indicator of their quality during project acceptance. In practice, tightness / sealing performance is evaluated by testing the amount of air leakage in the air duct.

[0003] Currently, duct leakage detection primarily involves using a fan to force air into a sealed duct section, achieving and stabilizing a specific pressure, measuring the airflow, and then calculating the leakage rate of that duct section. Existing duct leakage detection equipment uses a portable fan connected to the duct section under test via a flexible duct. A pressure measuring hole is drilled on or next to the flexible duct to measure the internal pressure of the duct section. This method utilizes an additional flexible duct, which may leak, leading to measurement inaccuracies.

[0004] In addition, there are two testing methods for measuring the air leakage of air ducts: positive pressure and negative pressure. Existing air leakage detection equipment for air ducts can only reverse the positive and negative pressure by changing the direction of the fan. If the fan direction needs to be changed on site, the detection equipment needs to be reinstalled, which is quite cumbersome.

[0005] Therefore, it is necessary to improve the existing equipment for detecting air leakage in air ducts. Utility Model Content

[0006] Based on the above-mentioned problems, the purpose of this application is to at least solve one of the aforementioned technical deficiencies. A detection device suitable for detecting air leakage in ductwork is proposed, which eliminates the need for additional flexible ductwork connecting the fan and the duct section being tested, thus improving measurement accuracy.

[0007] To achieve the above objectives, this application adopts the following technical solution:

[0008] A detection device for detecting air leakage in air ducts, comprising:

[0009] Control module, fan and at least one pressure sensor,

[0010] A static pressure ring is provided with a manifold, which is used to connect to the air duct being tested, and the static pressure ring is connected to the pressure sensor.

[0011] The pressure sensor integrates a first wireless module, which is electrically connected to the control module.

[0012] The wind turbine is electrically connected to a differential pressure sensor, which is electrically connected to the control module.

[0013] The control module controls the fan to rotate clockwise or counterclockwise based on instructions.

[0014] In one embodiment, the fan integrates a differential pressure sensor for detecting the pressure difference before and after the fan.

[0015] In one embodiment, the differential pressure sensor includes a second wireless module, the second wireless module being electrically... In another embodiment, the first wireless module includes at least one of Bluetooth, IoT, LoRa module or Zigbee module.

[0016] In one embodiment, the testing device includes a display module electrically connected to a control module for displaying test information.

[0017] In one embodiment, the duct is cuboid in shape, and the fan is disposed at one end of the cuboid duct. At least one of the four faces of the middle part of the duct is provided with a measuring hole, which is used to connect the manifold.

[0018] In one embodiment, the duct has measuring holes on its four sides in the middle section, and the measuring holes are used to connect to the manifold.

[0019] In one embodiment, the duct is columnar, the fan is disposed at one end of the duct, and at least one measuring hole is provided circumferentially in the middle of the duct for connecting the manifold.

[0020] In one embodiment, measuring holes are provided at equal intervals along the circumference of the middle part of the duct.

[0021] In one embodiment, the detection device for detecting air leakage in air ducts further includes a connector, which is sealed and fixed to the air duct by a sealing ring or sealant, and the manifold is connected to the connector.

[0022] Beneficial effects

[0023] Compared with existing solutions, the advantages of this application are:

[0024] The detection device proposed in this application eliminates the need for an additional flexible duct to connect the fan and the duct section under test, thus avoiding inaccurate measurements due to air leakage in the flexible duct. Furthermore, the pressure measurement employs multiple pressure measuring orifices located in the middle of the duct section under test, using a static pressure ring connection to obtain the average pressure at multiple locations. The data is then displayed in real-time on the host computer via Bluetooth or other remote communication methods. This avoids the influence of fan airflow when measuring the internal pressure of the duct section under test, thereby improving detection accuracy. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0026] Figure 1 This is a schematic diagram of a testing device for detecting air leakage in ducts, according to an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the connection between four pressure measuring points and the static pressure ring on the cross-section of the tested duct section in an embodiment of this application.

[0028] Figure 3 and Figure 4 This is a schematic diagram of the fan being fixed to the duct under test according to an embodiment of this application. Detailed Implementation

[0029] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.

[0030] Next, we will combine the appendix Figures 1-4 This application describes a testing device (hereinafter referred to as the testing device) suitable for detecting air leakage in air ducts.

[0031] The testing equipment includes a control module (also known as the main unit), a fan, and at least one pressure sensor. The pressure sensor integrates a first wireless module, which is electrically connected to the control module.

[0032] The control module is electrically connected to the fan and controls the fan to rotate clockwise or counterclockwise based on commands (clockwise / counterclockwise direction, as viewed from the operator's perspective).

[0033] A static pressure ring has manifolds spaced at intervals on it, which connect to the duct being tested, and the static pressure ring is connected to a pressure sensor. In this embodiment, the control module controls the main unit to rotate clockwise (also called forward rotation, used for positive pressure detection) or counterclockwise (also called reverse rotation, used for negative pressure detection), avoiding the current problem of repeated installation when testing positive and negative pressure.

[0034] In one embodiment, the fan integrates a differential pressure sensor for detecting the pressure difference before and after the fan.

[0035] In one embodiment, the detection device includes four pressure sensor measurement points. Each pressure sensor integrates a first wireless module, which may be a Bluetooth, IoT, LoRa module, or Zigbee module. The first wireless module is electrically connected to a control module to transmit the pressure information detected by the pressure sensor to the control module.

[0036] In one embodiment, the testing device includes a display module electrically connected to a control module for displaying test information.

[0037] The diagram shows the testing equipment used to inspect the tested duct. Figure 1 As shown,

[0038] The fan 20 is installed on one side of the duct 10 under test (the fan portion of the duct is sealed). For example, a hole of similar size to the fan can be made at one end of the duct under test. The external fan is fixed to the duct section under test with rivets or screws and then sealed. The external fan has a built-in differential pressure sensor that can measure the pressure difference before and after the fan. The fan and control module are connected via Bluetooth, IoT, LoRa, or Zigbee. In this method, the fan is directly installed on the duct under test, avoiding the possibility of air leakage that can occur with flexible ducts, thus improving the accuracy of the measurement results. The differential pressure sensor includes a second wireless module connected to the control module. The second wireless module is at least one of Bluetooth, IoT, LoRa, or Zigbee. The fan 20 is fixed to the side of the duct using fasteners 21 (such as bolts). The side of the duct 10 under test opposite to the fan 20 is sealed (e.g., blocked with sealant).

[0039] Small holes 11 (measuring holes) are made at circumferential intervals (e.g., equal intervals) in the middle of the duct being tested. The manifold 31 of the static pressure ring 30 is inserted into the matching small holes 11 and sealed (e.g., using a sealing ring or sealant 13). A pressure sensor 40 is installed on the static pressure ring (e.g., ...). Figure 2 (As shown).

[0040] Preferably, a hollow connector 12 is provided on the small hole 11 (measuring hole). The connector 12 is sealed and fixed to the air duct by a sealing ring or sealant 13. The manifold 31 is connected to the connector 12 (e.g., the manifold 31 is sleeved on the connector 12).

[0041] The control module uses a preset mode to detect air leakage in duct 10. After the control module remotely starts the external fan, the differential pressure data measured by the fan's built-in differential pressure sensor is transmitted to the control module, which automatically converts it into a flow rate value and records and stores it. Alternatively, the control module transmits the data to a remote server, where it automatically converts it into a flow rate value and records and stores it. After installation, the testing personnel can remotely control the air leakage test via the control module in the accessory. Simultaneously, the control module can record and store the pressure and airflow values ​​measured each time in real time. This testing device makes the air leakage testing process for ducts more convenient.

[0042] In this embodiment, the small hole is located in the middle of the duct section being measured (this small hole is connected to the pressure sensor via a static pressure ring, hence it is also called the opening position of the pressure sensor). The pressure sensor integrates a wireless module (such as Bluetooth, IoT, LoRa module, Zigbee module), so that the measured pressure value inside the duct can be transmitted to the control module in real time. Preferably, it is recorded and stored on the host or transmitted to a remote server through the control module. In this embodiment, the duct is cuboid, with small holes (also called measuring holes) on its four sides in the middle. Multiple holes are connected by a flexible tube to form a static pressure ring 30, which is then connected to the pressure sensor 40. The measured pressure value inside the duct can be transmitted to the control module in real time. In this embodiment, the measuring hole is located in the middle of the duct section being measured to avoid the influence of airflow interference near the fan, and the static pressure ring connection method provides more accurate measurement of the internal pressure of the pipe. In this embodiment, one pressure sensor 40 is used. In other embodiments, two or three pressure sensors 40 are set and then (average value is taken). The measuring hole is located away from the air inlet of the fan.

[0043] When the duct section under test needs to be tested under positive pressure, the control module controls the external fan to start blowing air into the duct section under test. When the duct section under test needs to be tested under negative pressure, the control module controls the external fan to start drawing air out of the duct section under test. The fan of this device can be controlled by the main unit to rotate forward and reverse, thereby avoiding the need to repeatedly install the fan when switching between the two operating conditions.

[0044] The above embodiments are only for illustrating the technical concept and features of this application, and are intended to enable those skilled in the art to understand the content of this application and implement it accordingly. They should not be used to limit the scope of protection of this application. All equivalent changes or modifications made in accordance with the spirit and essence of this application should be included within the scope of protection of this application.

Claims

1. A testing device suitable for detecting air leakage in air ducts, characterized in that, include: Control module, fan and at least one pressure sensor, A static pressure ring is provided with a manifold, which is used to connect to the air duct being tested, and the static pressure ring is connected to the pressure sensor. The pressure sensor integrates a first wireless module, which is electrically connected to the control module. The wind turbine is electrically connected to a differential pressure sensor, which is electrically connected to the control module. The control module controls the fan to rotate clockwise or counterclockwise based on instructions.

2. The detection device for detecting air leakage in ducts as described in claim 1, characterized in that, The fan is integrated with a differential pressure sensor, which is used to detect the pressure difference before and after the fan.

3. The detection device for detecting air leakage in air ducts as described in claim 2, characterized in that, The differential pressure sensor includes a second wireless module, which is electrically connected to the control module.

4. The detection device for detecting air leakage in ducts as described in claim 1, characterized in that, The first wireless module includes at least one of Bluetooth, IoT, LoRa module or Zigbee module.

5. The detection device for detecting air leakage in air ducts as described in claim 1, characterized in that, It includes a display module, which is electrically connected to a control module for displaying test information.

6. The detection device for detecting air leakage in air ducts as described in claim 1, characterized in that, The duct is cuboid in shape, and the fan is directly installed at one end of the cuboid duct. At least one of the four sides of the middle part of the duct is provided with a measuring hole, which is used to connect to the manifold.

7. The detection device for detecting air leakage in air ducts as described in claim 6, characterized in that, Measuring holes are provided on the four sides of the middle section of the duct, and the measuring holes are used to connect to the manifold.

8. The detection device for detecting air leakage in air ducts as described in claim 1, characterized in that, The duct is columnar, and the fan is directly installed at one end of the duct. At least one measuring hole is provided in the circumferential direction in the middle of the duct, and the measuring hole is used to connect to the manifold.

9. The detection device for detecting air leakage in air ducts as described in claim 8, characterized in that, Measuring holes are evenly spaced along the circumference of the middle section of the duct.

10. The detection device for detecting air leakage in air ducts as described in claim 6 or 8, characterized in that, It also includes a connector, which is sealed and fixed to the duct by a sealing ring or sealant, and the manifold is connected to the connector.

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