Air volume measuring assembly with shielding effectiveness

Abstract

An air volume measuring assembly with a shielding effect comprises a measuring tube, shielding ventilation windows are installed at the two ends in the measuring tube, a measuring body is installed between the two shielding ventilation windows, and an air inlet flange and an air outlet flange are installed at the two ends of the outer portion of the measuring tube respectively to press the shielding ventilation windows. An electric control unit is installed at the top, between the two flanges, of the measuring pipe, the electric control unit is provided with an electric control box with a shielding rubber strip, a PCB is installed in the electric control box, the PCB collects the air volume pressure difference transmitted by the measuring body, signal transmission is conducted through an aviation plug outside the shielding electric control box after processing, and the electric control unit is communicated with the measuring body through an air pipe; the electric control unit is further provided with an aviation plug, and the aviation plug transmits collected current signals to a system control center. The measuring body and the electric control unit are arranged to collect and transmit air volume data, the shielding ventilation window is arranged to meet the ventilation requirement, meanwhile, the electromagnetic shielding requirement is considered, and therefore the accuracy of signal collection and transmission is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of wind volume measurement, in particular to a wind volume measurement component with shielding efficiency. Background Art

[0002] Air volume measurement is mainly used as one of the measurement methods in ventilation systems. It is used to transmit the data measured by the air volume measurement component in the ventilation system to the control decision. Through the real-time transmission of air volume data, the air volume requirements of the ventilation system are met through means such as fan speed regulation. At present, there is no relevant technology for air volume measurement components that can work normally in the electromagnetic environment of the ventilation system fan, meet the electromagnetic compatibility requirements, and effectively block the electromagnetic waves in the ventilation.

[0003] In view of the above problems, it is urgent to design an air volume measurement component with shielding effectiveness and meeting electromagnetic compatibility requirements, which can meet the shielding requirements without affecting ventilation and realize the accurate collection and transmission of ventilation system air volume data without being affected by electromagnetic interference. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide an air volume measurement component with shielding effectiveness and meeting electromagnetic compatibility, so as to solve the problem that the air volume measurement components in the prior art cannot meet the requirements of shielding, accurate measurement and data transmission to the system control center under relevant electromagnetic interference after the fan is integrated into the ventilation system.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a wind volume measurement component with shielding effectiveness, including a measuring tube, shielding ventilation windows are installed at both ends of the measuring tube, a measuring body is installed between the two shielding ventilation windows, and an air inlet flange and an air outlet flange are respectively installed at the two ends of the outside of the measuring tube to press the shielding ventilation window, an electric control unit is installed at the top of the measuring tube between the two flanges, the electric control unit is provided with an electric control box with a shielding rubber strip, a PCB (Printed Circuit Board) board is installed inside the electric control box, the PCB (Printed Circuit Board) board collects the wind volume pressure difference transmitted by the measuring body, and transmits the signal through the external aviation plug of the shielding electric control box after processing, and the electric control unit is connected to the measuring body through an air pipe.

[0006] In a preferred solution, screw holes are provided on the circumference of the front and rear end faces of the measuring tube, and the air inlet flange and the air outlet flange are respectively fixed to the front and rear ends of the measuring tube by screws.

[0007] In a preferred solution, multiple layers of step holes are provided inside the measuring tube, the measuring body is installed in the middle of the measuring tube, and shielding ventilation windows are installed in the step holes at both ends of the measuring tube. The two shielding ventilation windows clamp the measuring body at both ends of the measuring tube through the air inlet flange and the air outlet flange to achieve shielding ventilation.

[0008] In a preferred solution, the air inlet flange and the air outlet flange installed at the front and rear ends of the measuring tube clamp the measuring tube while pressing the shielding ventilation windows installed in the step holes at both ends of the measuring tube.

[0009] In a preferred solution, the shielding ventilation window is made of a stainless steel nickel-plated plate, and hexagonal honeycomb holes of various shapes and sizes are densely arranged on the steel plate for shielding ventilation.

[0010] In the preferred scheme, the measuring body adopts an average velocity tube structure, and multiple groups of pressure holes are opened in the upstream direction and the rear direction. The first pressure port and the second pressure port near the air inlet and the air outlet are connected to the electronic control unit through the first air duct and the second air duct respectively, that is, connected to the pressure sensor on the PCB (Printed Circuit Board) board, and the pressure signal is converted into a current signal.

[0011] In a preferred solution, the first air duct is installed in the upstream direction, and the second air duct is installed in the rear direction. The first air duct and the second air duct are both connected by a silicone tube, and the outer sheath is provided with a steel wire sheath for protection.

[0012] In a preferred solution, the electronic control unit is provided with an electronic control box, in which a PCB (Printed Circuit Board) board is installed, and a pressure sensor is provided on the PCB (Printed Circuit Board) board to receive the wind pressure signal of the measuring body, and the high-pressure interface and the low-pressure interface of the pressure sensor are connected through a third air duct.

[0013] In a preferred solution, a conductive rubber strip is provided in the electric control box of the electric control unit, and the conductive rubber strip is arranged around the joint of the electric control box to shield the electromagnetic signal outside the electric control box.

[0014] In a preferred solution, an aviation plug is further provided outside the electric control box of the electric control unit, and the aviation plug transmits the collected current signal to the system control center.

[0015] The utility model provides an air volume measurement component with shielding effectiveness, which has the following beneficial effects:

[0016] 1. The utility model solves the problem that the air volume measurement components in the prior art cannot meet the requirements of shielding, accurate measurement and data transmission to the system control center after the fan is integrated into the ventilation system under relevant electromagnetic interference;

[0017] 2. The utility model realizes the attenuation and shielding of electromagnetic radiation while the air duct measuring tube is ventilated normally under the condition of electromagnetic compatibility and electromagnetic interference, so as to ensure the normal operation of the measuring body and the accurate collection and transmission of the measuring data by the electronic control unit;

[0018] 3. The shielding ventilation windows at the front and rear ends of the measuring tube of the utility model are set to meet the ventilation requirements while achieving the attenuation and shielding of electromagnetic radiation;

[0019] 4. The stainless steel material and pore structure of the shielding ventilation window of the utility model enable it to achieve attenuation and shielding of electromagnetic radiation while meeting ventilation requirements, and at the same time have corrosion resistance, thereby further improving the safety, reliability and service life of the device;

[0020] 5. The electronic control unit of the utility model and the setting of the connection with the measuring body enable the measurement data of the measuring body to be collected by the electronic control unit in real time and transmitted to the system control center, so that the air volume in the air duct can be measured and monitored in real time;

[0021] 6. The setting of the PCB (Printed Circuit Board) board of the electronic control unit of the utility model enables the collected signals of the electronic control unit to be collected, integrated and converted into information that can be recognized by the system control center;

[0022] 7. The utility model can provide an electric control box and a conductive rubber strip therein, so that the information integrated and converted by the PCB (Printed Circuit Board) board is not affected by external electromagnetic interference, thereby further ensuring the accuracy of measurement data collection and transmission, thereby improving the reliability and practicality of the device;

[0023] 8. The setting of the aviation connector of the electronic control unit of the utility model enables the information collected and converted by the electronic control unit to be accurately transmitted to the system control center without attenuation, thereby improving the reliability of the device;

[0024] 8. The utility model has an exquisite design, a simple and reliable structure, a small idea to solve a big problem, strong practicability, high reliability, high practical application value, and good economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model is further described below in conjunction with the accompanying drawings and implementation examples:

[0026] Figure 1 This is a front view of the appearance structure of the utility model;

[0027] Figure 2 This is a top view of the appearance structure of the utility model;

[0028] Figure 3 It is a cross-sectional view of the overall structure of the utility model;

[0029] Figure 4 It is a left view of the overall structure of the utility model;

[0030] Figure 5 It is the right view of the overall structure of the utility model;

[0031] In the figure: measuring tube 1, shielding ventilation window 2, measuring body 3, air inlet flange 4, air outlet flange 5, first pressure port 6, second pressure port 7, first air duct 8, second air duct 9, electric control box 10, PCB board 11, third air duct 12, conductive rubber strip 13, aviation plug 14. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0033] like Figures 1 to 5 As shown, a wind volume measurement component with shielding effectiveness includes a measuring tube 1, shielding ventilation windows 2 are installed at both ends of the measuring tube 1, a measuring body 3 is installed between the two shielding ventilation windows 2, an air inlet flange 4 and an air outlet flange 5 are respectively installed at the two ends of the outside of the measuring tube 1 to press the shielding ventilation windows 2, an electric control unit is installed at the top of the measuring tube 1 between the two flanges, the electric control unit is provided with an electric control box 10 with a shielding rubber strip, a PCB (Printed Circuit Board) board 11 is installed inside the electric control box 10, the PCB (Printed Circuit Board) board 11 collects the wind volume pressure difference transmitted by the measuring body 3, and transmits the signal through the external aviation plug 14 of the shielding electric control box 10 after processing, and the electric control unit is connected with the measuring body 3 through an air pipe.

[0034] In this embodiment, screw holes are provided on the circumference of the front and rear end surfaces of the measuring tube 1 , and the air inlet flange 4 and the air outlet flange 5 are respectively fixed to the front and rear ends of the measuring tube 1 by screws.

[0035] Furthermore, the measuring tube 1 is provided with multiple layers of step holes, the measuring body 3 is installed in the middle of the measuring tube 1, and shielding ventilation windows 2 are installed in the step holes at both ends of the measuring tube 1. The two shielding ventilation windows 2 clamp the measuring body 3 at both ends of the measuring tube 1 through the air inlet flange 4 and the air outlet flange 5 to achieve shielding ventilation.

[0036] Furthermore, the air inlet flange 4 and the air outlet flange 5 installed at the front and rear ends of the measuring tube 1 clamp the measuring tube 1 while pressing the shielding ventilation windows 2 installed in the step holes at the two ends of the measuring tube 1.

[0037] Furthermore, the shielding ventilation window 2 is made of a stainless steel nickel-plated plate, and hexagonal honeycomb holes of various shapes and sizes are densely arranged on the steel plate for shielding ventilation.

[0038] Furthermore, the measuring body 3 adopts an average velocity tube structure, and a plurality of pressure holes are provided in the upstream direction and the rear direction. The first pressure port 6 and the second pressure port 7 near the air inlet and the air outlet are connected to the electronic control unit through the first air duct 8 and the second air duct 9 respectively, that is, connected to the pressure sensor on the PCB (Printed Circuit Board) 11, so as to convert the pressure signal into a current signal.

[0039] Furthermore, the first air duct 8 is installed in the upstream direction, and the second air duct 9 is installed in the rear direction. The first air duct 8 and the second air duct 9 are both connected by a silicone tube, and the outer sheath is provided with a steel wire sheath for protection.

[0040] Furthermore, the electronic control unit is provided with an electronic control box 10, in which a PCB (Printed Circuit Board) board 11 is installed. A pressure sensor is provided on the PCB (Printed Circuit Board) board 11 to receive the wind pressure signal of the measuring body 3, and the high-pressure interface and the low-pressure interface of the pressure sensor are connected through a third air duct 12.

[0041] Furthermore, a conductive rubber strip 13 is disposed in the electric control box 10 of the electric control unit. The conductive rubber strip 13 is disposed around the joint of the electric control box to shield electromagnetic signals outside the electric control box.

[0042] Furthermore, an aviation plug 14 is provided outside the electric control box 10 of the electric control unit, and the aviation plug 14 transmits the collected current signal to the system control center.

[0043] During specific use, a wind volume measurement component with shielding effectiveness that has been installed and debugged properly is installed in the ventilation cavity of the system. During the ventilation process of the system, the wind pressure generated by the fan flows through the shielded ventilation window 2 at the air inlet, through the measuring body 3 in the measuring tube 1, and is sent to the shielded ventilation window 2. The electromagnetic interference and radiation generated by the fan are attenuated and shielded when passing through the gaps in the shielded ventilation window 2. During the ventilation process, the wind pressure collected by the measuring body 1 is collected in real time on the PCB (Printed Circuit Board) board 11 through the electrical signal formed by the pressure sensor, and is transmitted to the system control center for decision-making through the aviation plug 14; during this process, the electromagnetic interference and radiation generated by the system are shielded by the sealed box formed by the conductive rubber strip 13 of the electronic control unit and the electronic control box 10, preventing electromagnetic interference and electromagnetic radiation from affecting the operation of the PCB (Printed Circuit Board) board 11 and electronic components such as the pressure sensor.

[0044] In the preferred scheme, screw holes are provided on the circumference of the front and rear end faces of the measuring tube 1, and the air inlet flange 4 and the air outlet flange 5 are respectively installed and fixed to the front and rear ends of the measuring tube 1 by screws; the above arrangement enables the measuring tube 1 to be installed and fixed together with the air inlet flange 4 and the air outlet flange 5, providing an installation basis for the measuring body 3, the shielding ventilation window 2, and the electronic control unit.

[0045] In the preferred scheme, the measuring tube 1 is provided with multiple layers of step holes, the measuring body 3 is installed in the middle part of the measuring tube 1, and shielding ventilation windows 2 are installed in the step holes at both ends of the measuring tube 1. The two shielding ventilation windows 2 clamp the measuring body 3 at both ends of the measuring tube 1 through the air inlet flange 4 and the air outlet flange 5 to achieve shielding ventilation; the above arrangement enables the shielding ventilation windows 2 and the measuring body 3 to be effectively fixed in the measuring tube 1, providing a guarantee for the subsequent accurate acquisition of the signal source of the measuring body 1.

[0046] In the preferred scheme, the air inlet flange 4 and the air outlet flange 5 installed at the front and rear ends of the measuring tube 1 clamp the measuring tube 1 while pressing the shielding ventilation window 2 installed in the step holes at both ends of the measuring tube 1; the above arrangement enables the measuring tube 1 to be installed and fixed as a whole with the air inlet flange 4 and the air outlet flange 5, while the shielding ventilation window 2 can be effectively fixed, so that the shielding function of the shielding ventilation window 2 can be realized.

[0047] In the preferred scheme, the shielding ventilation window 2 is made of stainless steel nickel-plated plate, and hexagonal honeycomb holes of various shapes and sizes are densely arranged on the steel plate for shielding ventilation; the above setting enables the shielding function and ventilation effect of the shielding ventilation window 2 to be realized, and at the same time has the function of electromagnetic radiation attenuation, especially the setting of stainless steel material, which improves the corrosion resistance of the shielding ventilation window 2, thereby further improving the reliability and practicality of the device.

[0048] In the preferred embodiment, the measuring body 3 adopts an average velocity tube structure, and a plurality of pressure holes are provided in the upstream direction and the rear direction, wherein the first pressure port 6 and the second pressure port 7 near the air inlet and the air outlet are connected to the electronic control unit through the first air duct 8 and the second air duct 9 respectively, that is, connected to the pressure sensor on the PCB (Printed Circuit Board) board 11, and the pressure signal is converted into a current signal; the above arrangement enables the function of the measuring body 3 to be realized, and the pressure difference formed between the dynamic pressure upstream of the measuring tube 1 and the static pressure downstream is converted into a current signal through the pressure sensor on the PCB (Printed Circuit Board) board 11, thereby achieving the purpose of calculating the fluid flow rate through the magnitude of the current signal, and at the same time, the signal measured by the measuring body 3 is collected by the electronic control unit in real time.

[0049] In the preferred scheme, the first air duct 8 is installed in the upstream direction, and the second air duct 9 is installed in the rear direction. The first air duct 8 and the second air duct 9 are connected by a silicone tube, and the outer sheath is protected by a steel wire sheath. The above arrangement enables the pressure difference formed between the dynamic pressure upstream of the measuring tube 1 and the static pressure downstream to be accurately measured and transmitted. At the same time, the air duct adopts a silicone tube with a steel wire sheath on the outside, which makes the air duct have higher strength, enhances its corrosion resistance and wind resistance, and further improves the safety and reliability of the device.

[0050] In a preferred embodiment, the electronic control unit is provided with an electronic control box 10, in which a PCB (Printed Circuit Board) board 11 is installed, and a pressure sensor is provided on the PCB (Printed Circuit Board) board 11 to receive the wind pressure signal of the measuring body 3, and the high-pressure interface and the low-pressure interface of the pressure sensor are connected through the third air duct 12; the above arrangement enables the various acquisition units of the electronic control unit and their signals to be integrated and converted, thereby improving the accuracy of data acquisition and transmission; the arrangement of the third air duct 12 ensures the performance of the pressure sensor, thereby further improving the safety, reliability and service life of the device.

[0051] In a preferred solution, a conductive rubber strip 13 is provided in the electric control box 10 of the electric control unit, and the conductive rubber strip 13 is arranged around the joints of the electric control box to shield the electromagnetic signals outside the electric control box; the above arrangement prevents the electric control components in the electric control box 10 from being affected by the electromagnetic signals, thereby ensuring the accuracy of data collection and transmission by the electric control unit while improving the reliability, safety and life of the device.

[0052] In the preferred solution, an aviation plug 14 is also provided on the outside of the electric control box 10 of the electric control unit, and the aviation plug 14 transmits the collected current signal to the system control center; the above setting enables the electric control unit to convert the air volume collection pressure difference signal transmitted by the measuring body 3 into an electrical signal, and upload the data to the external system control center for display through the aviation plug 14, so as to facilitate the operator to timely control the air volume of the ventilation duct.

[0053] In summary, the utility model provides an air volume measurement component with shielding efficiency, which solves the problem that the air volume measurement component of the prior art cannot meet the requirements of shielding, accurate measurement and data transmission to the system control center under relevant electromagnetic interference after the fan is integrated into the ventilation system; it realizes that under the conditions of electromagnetic compatibility and electromagnetic interference, the electromagnetic radiation is attenuated and shielded while the air duct measurement tube is ventilated normally, so as to ensure the normal operation of the measuring body and the accurate collection and transmission of the measurement data by the electronic control unit; by setting the shielding ventilation window 2 at the front and rear ends of the measuring tube 1, the attenuation and shielding of the electromagnetic radiation are achieved while the ventilation is met; by setting the stainless steel material of the shielding ventilation window 2 and its pore structure, the attenuation and shielding of the electromagnetic radiation are achieved while the ventilation is met, and the corrosion resistance is also achieved, thereby further improving the safety, reliability and service life of the device; by the electronic control unit and the setting of the connection with the measuring body 1, the measurement data of the measuring body 1 can be collected and transmitted to the system control center by the electronic control unit in real time, so that the air volume in the air duct can be measured and monitored in real time; the electronic control unit PCB (Printed Circuit By setting up the printed circuit board (PCB) 11, the signals collected by the electronic control unit can be collected, integrated and converted into information that can be recognized by the system control center; by setting up the electronic control box 10 and setting up the conductive rubber strip 13 inside it, the information integrated and converted by the PCB board is not affected by external electromagnetic interference, thereby further ensuring the accuracy of measurement data collection and transmission, thereby improving the reliability and practicality of the device; by setting up the aviation connector 14 in the electronic control unit, the information collected and converted by the electronic control unit can be transmitted to the system control center without attenuation and accurately, thereby improving the reliability of the device; the utility model is exquisitely designed, simple and reliable in structure, a small idea solves a big problem, has strong practicality, high reliability, high practical application value, and has good economic and social benefits.

Claims

1. An air volume measurement assembly with shielding effectiveness, characterized in that: The measuring tube (1) comprises a measuring tube (1), shielded ventilation windows (2) are installed at both ends of the measuring tube (1), a measuring body (3) is installed between the two shielded ventilation windows (2), an air inlet flange (4) and an air outlet flange (5) are installed at both ends of the outside of the measuring tube (1) to press the shielded ventilation windows (2), an electric control unit is installed at the top of the measuring tube (1) between the two flanges, the electric control unit is provided with an electric control box (10) with a shielding rubber strip, a PCB board (11) is installed inside the electric control box (10), the PCB board (11) collects the air volume pressure difference transmitted by the measuring body (3), and after processing, transmits the signal through an external aviation plug (14) of the shielded electric control box (10), and the electric control unit is connected to the measuring body (3) through an air pipe.

2. The air volume measurement assembly with shielding effectiveness according to claim 1, characterized in that: The front and rear end surfaces of the measuring tube (1) are provided with screw holes on the circumference, and the air inlet flange (4) and the air outlet flange (5) are respectively fixed to the front and rear ends of the measuring tube (1) by screws.

3. The air volume measurement assembly with shielding effectiveness according to claim 2, characterized in that: The measuring tube (1) is provided with multiple layers of stepped holes, the measuring body (3) is installed in the middle of the measuring tube (1), and shielding ventilation windows (2) are installed in the stepped holes at both ends of the measuring tube (1). The two shielding ventilation windows (2) clamp the measuring body (3) at both ends of the measuring tube (1) through an air inlet flange (4) and an air outlet flange (5) to achieve shielding ventilation.

4. The air volume measurement assembly with shielding effectiveness according to claim 3, characterized in that: The air inlet flange (4) and the air outlet flange (5) installed at the front and rear ends of the measuring tube (1) clamp the measuring tube (1) while pressing the shielding ventilation windows (2) installed in the step holes at the two ends of the measuring tube (1).

5. The air volume measurement assembly with shielding effectiveness according to claim 3, characterized in that: The shielding ventilation window (2) is made of a stainless steel nickel-plated plate, on which hexagonal honeycomb holes of various shapes and sizes are densely arranged for shielding ventilation.

6. The air volume measurement assembly with shielding effectiveness according to claim 1, characterized in that: The measuring body (3) adopts an average velocity tube structure, and has a plurality of pressure holes in the flow direction and the rear direction, wherein the first pressure hole (6) and the second pressure hole (7) near the air inlet and the air outlet are connected to the electronic control unit through the first air duct (8) and the second air duct (9), respectively, that is, connected to the pressure sensor on the PCB board (11), so as to convert the pressure signal into a current signal.

7. The air volume measurement assembly with shielding effectiveness according to claim 6, characterized in that: The first air duct (8) is installed in the upstream direction, and the second air duct (9) is installed in the rear direction. The first air duct (8) and the second air duct (9) are both connected by a silicone tube, and the outer sheath is provided with a steel wire sheath for protection.

8. The air volume measurement assembly with shielding effectiveness according to claim 7, characterized in that: The electric control unit is provided with an electric control box (10), a PCB board (11) is installed in the electric control box (10), a pressure sensor is provided on the PCB board (11) to receive the wind pressure signal of the measuring body (3), and the high-pressure interface and the low-pressure interface of the pressure sensor are connected through the third air duct (12).

9. The air volume measurement assembly with shielding effectiveness according to claim 8, characterized in that: A conductive rubber strip (13) is arranged in the electric control box (10) of the electric control unit, and the conductive rubber strip (13) is arranged around the joint of the electric control box to shield electromagnetic signals outside the electric control box.

10. The air volume measurement assembly with shielding effectiveness according to claim 7, characterized in that: An aviation plug (14) is also provided outside the electric control box (10) of the electric control unit, and the aviation plug (14) transmits the collected current signal to the system control center.

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