Fiber fabric air pipe air volume measuring device and air supply system

Abstract

The utility model relates to the technical field of air pipe fluid parameter measurement, in particular to an air volume measuring device of a fiber fabric air pipe air supply system, which comprises a fixed air pipe, a first static pressure ring, a second static pressure ring and a single chip microcomputer, the fixed air pipe is sleeved outside the first static pressure ring and the second static pressure ring, and a first end of the fixed air pipe is connected with a cloth bag air pipe. The second end of the fixed air pipe is connected with the air supply main pipeline; each of the first static pressure ring and the second static pressure ring comprises a plurality of static pressure holes which penetrate through the side wall of the fixed air pipe and are communicated with the fixed air pipe, the static pressure holes in the first static pressure ring and the second static pressure ring are respectively communicated through static pressure pipes, each static pressure pipe is connected with a pressure measuring device, and each pressure measuring device is electrically connected with the single chip microcomputer. The device can be used as a conventional air pipe connecting part to be connected with the fiber fabric air pipe, temporary punching is not needed during measurement, and through multi-point monitoring, measurement data are more accurate, measurement errors can be reduced, and the air volume detection precision of the fiber fabric air pipe can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air duct fluid parameter measurement, in particular to an air volume measurement device for a fiber fabric air duct air supply system. Background Art

[0002] Fabric duct is a flexible air distribution system made of special fibers. It is an air outlet terminal system that replaces traditional air supply ducts, air valves, diffusers, insulation materials, etc. Compared with traditional metal ducts, fabric ducts have many advantages, such as uniform air supply, anti-condensation, easy cleaning and maintenance, and light weight. In fact, these advantages are all subject to the core indicator of fabric ducts - permeability.

[0003] Permeability can be understood as the air flow rate of the fabric duct, which refers to the air flow rate per unit time per unit duct surface area under a fixed pressure difference. The fabric material must have a certain permeability so that the temperature of the inner and outer surfaces of the duct can be consistent, thereby preventing condensation. Only by accurately controlling the permeability can the fabric duct better meet the system design air volume and system pressure.

[0004] However, due to the permeability of fabric ducts, fabric ducts are more prone to dust accumulation than traditional metal ducts. If the amount of dust accumulation is too large, the permeability of the fabric duct will be too small, and the air supply volume of the duct will not meet the design standard. There will also be a greater temperature difference between the inner and outer surfaces of the duct, increasing the risk of condensation in the duct. By monitoring whether the air volume of the duct deviates from the design parameters of the air conditioning unit, it is possible to effectively determine whether the duct is dusty.

[0005] The traditional method of measuring static pressure difference of metal air ducts is mostly single-point measurement, and the measurement requires drilling a hole in the side wall of the air duct and the inspection is carried out by hand by the inspector, so there is a large measurement error.

[0006] Therefore, how to improve the air volume detection accuracy of fiber fabric air ducts is a technical problem that urgently needs to be solved. Utility Model Content

[0007] The purpose of the utility model is to provide a fiber fabric air duct air volume measuring device and an air supply system, which can be connected to the fiber fabric air duct as a conventional air duct connecting component, without the need for temporary drilling during measurement. Through multi-point automatic monitoring, the measurement data can be more uniform and accurate, and the measurement error can be reduced, so as to solve the problem of low air volume detection accuracy of existing fiber fabric air ducts.

[0008] The embodiment of the utility model is realized by the following technical scheme: a fiber fabric air duct air volume measuring device, comprising a fixed air duct, a first static pressure ring, a second static pressure ring and a single chip computer;

[0009] Wherein, the fixed air duct is sleeved on the outside of the first static pressure ring and the second static pressure ring, the first end of the fixed air duct is connected to the bag air duct, and the second end of the fixed air duct is connected to the air supply main duct;

[0010] The first static pressure ring and the second static pressure ring both include a plurality of static pressure holes that penetrate the side wall of the fixed air duct and are connected to the fixed air duct. The plurality of static pressure holes on the first static pressure ring and the second static pressure ring are connected through static pressure pipes, respectively, and each of the static pressure pipes is connected to a pressure measuring device, and each of the pressure measuring devices is electrically connected to the single-chip computer.

[0011] According to a preferred embodiment, the fixed air duct is a fiber fabric air duct.

[0012] According to a preferred embodiment, the first end of the fiber fabric air duct and the bag air duct, and the second end of the fiber fabric air duct and the air supply main duct are both connected by industrial zippers.

[0013] According to a preferred embodiment, the first static pressure ring and the second static pressure ring are both made of stainless steel bent pipes, and the static pressure pipes are hollow stainless steel pipes.

[0014] According to a preferred embodiment, the plurality of static pressure holes on the first static pressure ring and the second static pressure ring are arranged in a circumferential array.

[0015] According to a preferred embodiment, four static pressure holes are provided on each of the first static pressure ring and the second static pressure ring.

[0016] According to a preferred embodiment, the pressure measuring device is a differential pressure sensor.

[0017] According to a preferred embodiment, a storage module is further included, and the single chip microcomputer is electrically connected to the storage module.

[0018] According to a preferred embodiment, a display module is further included, and the single chip microcomputer is electrically connected to the display module.

[0019] The utility model also provides an air supply system, comprising the fiber fabric air duct air volume measuring device as described above.

[0020] The technical solution of a fiber fabric duct air volume measuring device and an air supply system provided by the embodiment of the utility model has at least the following advantages and beneficial effects: it can be connected to the fiber fabric duct as a conventional duct connecting component, without the need for temporary drilling during measurement, and through multi-point automatic monitoring, the measurement data can be more uniform and accurate, which can reduce measurement errors and improve the air volume detection accuracy of the fiber fabric duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a structural schematic diagram of a first preferred embodiment of a fiber fabric air duct air volume measuring device of the utility model;

[0022] Figure 2 This is a schematic diagram of the static pressure ring structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the electrical connection of the utility model;

[0024] Icons: 1-fixed air duct, 2-first static pressure ring, 3-second static pressure ring, 4-bag air duct, 5-air supply main duct, 6-static pressure hole, 7-static pressure pipe, 8-differential pressure sensor, 9-industrial zipper. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Figure 1 This is a schematic diagram of the structure of the first preferred embodiment of a fiber fabric air duct air volume measurement device of the utility model. Figure 1 As shown, the utility model is a fiber fabric air duct air volume measuring device, comprising a fixed air duct 1, a first static pressure ring 2, a second static pressure ring 3 and a single chip computer.

[0027] The first static pressure ring 2 and the second static pressure ring 3 are arranged in parallel, the fixed air duct 1 is sleeved on the outside of the first static pressure ring 2 and the second static pressure ring 3, and the outer diameters of the first static pressure ring 2 and the second static pressure ring 3 are adapted to the pipe diameter of the fixed air duct 1, so that the fixed air duct 1 fits tightly with the first static pressure ring 2 and the second static pressure ring 3. Preferably, the first static pressure ring 2 and the second static pressure ring 3 are both made of stainless steel bent pipes to avoid condensation.

[0028] In one embodiment, after the first static pressure ring 2 and the second static pressure ring 3 are embedded in the fixed air duct 1, a tightener is used to fix the first static pressure ring 2, the second static pressure ring 3 and the fixed air duct 1 to enhance the stability of the connection between the static pressure ring and the fixed air duct 1, and the static pressure ring is used to support the fixed air duct 1 to ensure that it has a smooth inner wall, thereby ensuring the accuracy of air volume and air pressure measurement.

[0029] Furthermore, in this embodiment, the fixed air duct 1 is a fiber fabric air duct, the first end of the fiber fabric air duct is connected to the metal connector of the bag air duct 4 by an industrial zipper 9 with a compressive strength not less than that of the fiber fabric air duct, and the second end of the fiber fabric air duct is connected to the air supply main duct 5 by an industrial zipper 9. Thus, the device can be used as a conventional air duct connection component to connect with the fiber fabric air duct, without the need for temporary drilling during measurement.

[0030] See also Figure 2 As shown, the first static pressure ring 2 and the second static pressure ring 3 both include a plurality of static pressure holes 6 that penetrate the side wall of the fixed air duct 1 and are connected to the fixed air duct 1. Preferably, the outer diameter of the first static pressure ring 2 and the second static pressure ring 3 is D, and the diameter of the static pressure hole 6 is 0.25D; four static pressure holes 6 are arranged on the first static pressure ring 2 and the second static pressure ring 3, and the four static pressure holes 6 are arranged in a circular array in the circumference of the static pressure ring; through multi-point automatic monitoring, the measurement data is made more uniform and accurate, and the measurement error can be reduced to improve the air volume detection accuracy of the fiber fabric air duct.

[0031] Furthermore, static pressure pipes 7 are respectively provided in the axial direction of several of the static pressure holes 6. Preferably, the static pressure pipes 7 are hollow stainless steel pipes to avoid condensation. Several static pressure holes 6 on the first static pressure ring 2 and the second static pressure ring 3 are respectively connected through static pressure pipes 7, and each of the static pressure pipes 7 is connected to a pressure measuring device.

[0032] The pressure measuring device is a differential pressure sensor 8, which is used to obtain the wind pressure on the corresponding static pressure ring. Each differential pressure sensor 8 is electrically connected to a single-chip microcomputer, which samples and converts the wind pressure information into a digital signal through an ADC, and calculates the air volume using the Bernoulli equation. The specific calculation process is as follows:

[0033] Assuming that the inner diameter of the first static pressure ring 2 is φ1, the inner diameter of the second static pressure ring 3 is φ2, and a differential pressure sensor 8 of level 0.25 is used, the wind flow area S1 at the first static pressure ring 2 and the wind flow area S2 at the second static pressure ring 3 are:

[0034]

[0035] Then the Bernoulli equation on the two sections S1 and S2 is:

[0036]

[0037] In the above formula, p1 represents the static pressure at section S1, p2 represents the static pressure at section S2, V1 represents the average wind speed at section S1, V2 represents the average wind speed at section S2, H1 represents the elevation at section S1, H2 represents the elevation at section S2, ρ1 represents the fluid density at section S1, ρ2 represents the fluid density at section S2, and g represents the acceleration of gravity;

[0038] If the two sections S1 and S2 are very close to each other and are located at the same elevation, then:

[0039]

[0040] but

[0041]

[0042]

[0043] Assume the wind volume is Q, considering the average wind speed on the two sections Can be obtained:

[0044]

[0045] Further, see Figure 3 As shown, the fiber fabric air duct air volume measurement device also includes a storage module and a display module, the single chip microcomputer is electrically connected to the storage module, and the single chip microcomputer is electrically connected to the display module. In this embodiment, the air volume data calculated in real time is stored in the storage module; the display module includes an LCD display screen and a button, and the LCD display screen is used to display parameters such as wind pressure and air volume in real time. In addition, historical data can be queried by pressing a button, which will not be repeated here.

[0046] The fiber fabric air duct air volume measuring device is in a standby state when the differential pressure sensor 8 has no signal, and wakes up the single-chip microcomputer to work when the differential pressure sensor 8 has a signal, thereby reducing the energy consumption of the device.

[0047] The embodiment of the utility model also provides an air supply system, which includes the fiber fabric air duct air volume measuring device as described above.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fiber fabric air duct air volume measuring device, characterized in that: It comprises a fixed air duct (1), a first static pressure ring (2), a second static pressure ring (3) and a single chip computer; The fixed air duct (1) is sleeved on the outside of the first static pressure ring (2) and the second static pressure ring (3), the first end of the fixed air duct (1) is connected to the bag air duct (4), and the second end of the fixed air duct (1) is connected to the main air supply duct (5); The first static pressure ring (2) and the second static pressure ring (3) both comprise a plurality of static pressure holes (6) penetrating the side wall of the fixed air duct (1) and connected to the fixed air duct (1); the plurality of static pressure holes (6) on the first static pressure ring (2) and the second static pressure ring (3) are respectively connected via static pressure pipes (7), and each of the static pressure pipes (7) is connected to a pressure measuring device, and each of the pressure measuring devices is electrically connected to the single chip computer.

2. The fiber fabric air duct air volume measuring device according to claim 1, characterized in that: The fixed air duct (1) is a fiber fabric air duct.

3. The fiber fabric air duct air volume measuring device according to claim 2, characterized in that: The first end of the fiber fabric air duct and the bag air duct (4), and the second end of the fiber fabric air duct and the main air supply duct (5) are both connected via an industrial zipper (9).

4. The fiber fabric air duct air volume measuring device according to claim 1, characterized in that: The first static pressure ring (2) and the second static pressure ring (3) are both made of stainless steel bent pipes, and the static pressure pipe (7) is a hollow stainless steel pipe.

5. The fiber fabric air duct air volume measuring device according to claim 1, characterized in that: The plurality of static pressure holes (6) on the first static pressure ring (2) and the second static pressure ring (3) are arranged in a circular array.

6. The fiber fabric air duct air volume measuring device according to claim 1, characterized in that: The first static pressure ring (2) and the second static pressure ring (3) are each provided with four static pressure holes (6).

7. The fiber fabric air duct air volume measuring device according to claim 1, characterized in that: The pressure measuring device is a differential pressure sensor (8).

8. The fiber fabric air duct air volume measuring device according to claim 1, characterized in that: It also includes a storage module, and the single chip microcomputer is electrically connected to the storage module.

9. The fiber fabric air duct air volume measuring device according to claim 1, characterized in that: It also includes a display module, and the single chip microcomputer is electrically connected to the display module.

10. An air supply system, characterized in that: It comprises the fiber fabric air duct air volume measuring device as described in any one of claims 1 to 9.

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