CN215114674U

CN215114674U - Air quantity calibration device

Info

Publication number: CN215114674U
Application number: CN202121725098.9U
Authority: CN
Inventors: 张盛; 刘海
Original assignee: Suzhou Greatminds Temperature Control Technology Co ltd
Current assignee: Suzhou Greatminds Temperature Control Technology Co ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2021-12-10
Anticipated expiration: 2031-07-27

Abstract

The application provides an amount of wind calibration device relates to the fan field of making. The air quantity calibration device comprises an air duct, a first spoiler, a ventilation plate and a speed measuring device. The air duct is provided with an air inlet end, and the air inlet end is used for installing an air source. The first spoiler is connected with the air duct. The ventilating board is connected in the dryer, and the ventilating board is located one side that first spoiler deviates from the air inlet end. The speed sensor is installed in the ventilating board, and the speed sensor has first ventilation hole, and the speed sensor is used for measuring the velocity of flow through the air current in first ventilation hole. This amount of wind calibration device is through setting up the dryer, collects the air current that the wind regime blew out, breaks up the air current through first spoiler for the air current in the dryer is even stable, and at this moment, the rethread is installed the speed sensor on the ventilating board and is detected the wind speed, reachs the wind speed after, multiplies with draught area, can obtain the amount of wind. The air quantity calibration device is simple in structure and low in cost, and can conveniently measure the air quantity of the air source.

Description

Air quantity calibration device

Technical Field

The application relates to the field of fan manufacturing, in particular to an air volume calibration device.

Background

The fan is an important part indispensable in the heat dissipation of electrical equipment, and the air volume is an important performance parameter of the fan. Generally, when fans are produced in large quantities, the performance of the fans is judged by reading the rotating speed of the fans, the fan is judged to be qualified within 8% of the error of the rotating speed of the fans, however, the method for reading the rotating speed cannot accurately reflect the real air volume, misjudgment is easily caused to some fans with unqualified performance, and the quality is poor. If the wind tunnel system is adopted to test the fan, the cost of the wind tunnel is too high, so that the cost is greatly increased.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide an air volume calibration device, which aims at ensuring the air volume of a fan to be tested while ensuring lower manufacturing cost.

In a first aspect, an embodiment of the present application provides an air volume calibration device, which includes an air duct, a first spoiler, a ventilation plate, and a speed measuring device. The air duct is provided with an air inlet end, and the air inlet end is used for installing an air source. The first spoiler is connected with the air duct. The ventilating board is connected in the dryer, and the ventilating board is located one side that first spoiler deviates from the air inlet end. The speed sensor is installed in the ventilating board, and the speed sensor has first ventilation hole, and the speed sensor is used for measuring the velocity of flow through the air current in first ventilation hole.

In the technical scheme, the air quantity calibration device collects air flow blown out by an air source through the air duct, breaks up the air flow through the first spoiler, enables the air flow in the air duct to be uniform and stable, forms linear air speed, detects the air speed through the speed measuring device arranged on the ventilating plate, multiplies a ventilation area after the air speed is obtained, and obtains the air quantity. The air quantity calibration device is simple in structure and low in cost, and can conveniently measure the air quantity of the air source.

As an optional technical scheme of the embodiment of the application, a plurality of second ventilation holes which are circumferentially and uniformly distributed by taking the first ventilation holes as centers are arranged on the ventilation plate.

In the technical scheme, the plurality of second ventilation holes are uniformly formed in the ventilation plate, so that air flow can be discharged from the second ventilation holes, the ventilation area is increased, and quick ventilation is facilitated. In addition, because the plurality of second vent holes are circumferentially and uniformly opened by taking the first vent hole as a center, the flow speed of the airflow passing through each second vent hole is equal to the flow speed of the airflow passing through the first vent hole. Therefore, the flow rate of the second vent hole can be represented by the flow rate of the first vent hole, and the air volume can be obtained by multiplying the flow rate of the first vent hole by the total ventilation area.

As an optional technical solution of the embodiment of the present application, the second ventilation hole extends along a radial direction of the air duct.

In the technical scheme, the second ventilation holes are arranged to extend along the radial direction of the air cylinder, so that the ventilation area is further increased, the rapid ventilation is facilitated, and the air source is more suitable for the large air quantity.

As an optional technical scheme of this application embodiment, the dryer still has the air-out end of arranging with the air inlet end is relative in its axial. In the axial direction, the ventilating plate and the air outlet end have a distance.

In above-mentioned technical scheme, the ventilating board is located between air inlet end and the air-out end, and wind can not disperse fast through the ventilating board, increases the accuracy of speed sensor reading.

As an optional technical solution of the embodiment of the present application, the air duct includes a first duct section, a second duct section, and a third duct section that are coaxially arranged. The first spoiler is installed between the first cylinder section and the second cylinder section. The ventilation board is installed between second section of thick bamboo and third section of thick bamboo. Wherein, the one end that first section of thick bamboo deviates from first spoiler forms the air inlet end. One end of the third cylinder section deviating from the ventilating plate forms an air outlet end.

In the technical scheme, the air duct is divided into the first duct section, the second duct section and the third duct section, so that the first spoiler and the ventilation plate are convenient to install.

As an optional technical scheme of this application embodiment, first section of thick bamboo has the link relative with the air inlet end in the axial, and the link is used for being connected with first spoiler, and the diameter of first section of thick bamboo increases from the air inlet end to the link gradually.

In the technical scheme, the wind source is connected to the air inlet end with the smaller diameter, and the first spoiler is connected to the connecting end with the larger diameter, so that the air flow generated by the wind source is amplified after passing through the first barrel section, the air flow range is enlarged, the air flow can pass through the ventilating plate, and the air flow can be conveniently measured.

As an optional technical solution of the embodiment of the present application, an axial dimension of the second cylinder section is equal to an axial dimension of the third cylinder section.

In above-mentioned technical scheme, through making the axial dimensions of second section of thick bamboo section and third section of thick bamboo section equal, be convenient for guarantee that the air current is even stable around the ventilating board.

As an optional technical solution of the embodiment of the present application, an inner diameter of the second cylinder section is equal to an inner diameter of the third cylinder section.

In the technical scheme, the inner diameter of the second cylinder section is equal to that of the third cylinder section, so that the air flow is ensured to be uniform and stable before and after passing through the ventilation plate.

As an optional technical scheme of the embodiment of the application, the air volume calibration device comprises a second spoiler, and the second spoiler is connected to the air outlet end.

In the technical scheme, the second spoiler is arranged at the air outlet end, so that the flow velocity of air in the air duct can be kept stable, and the measurement precision is increased.

As an optional technical scheme of the embodiment of the application, the air volume calibration device comprises a pressure detection device, and the pressure detection device is used for detecting the pressure in the air duct.

In the technical scheme, the pressure in the air duct is detected by the pressure detection device, and then compared with the atmospheric pressure, and the air pressure which is another important performance index of the air source can be obtained through calculation.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of an air volume calibration device provided in an embodiment of the present application;

fig. 2 is an exploded view of an air volume calibration device provided in the embodiment of the present application.

Icon: 10-air volume calibration device; 100-air duct; 110-a first barrel section; 120-a second barrel section; 121-air inlet end; 122-a connection end; 130-a third barrel section; 131-an air outlet end; 200-a first spoiler; 300-a ventilation board; 310-a second vent; 400-a speed measuring device; 410-a first vent; 500-a base; 510-air volume display; 520-differential pressure display; 530-power plug; 540-first arc; 550-a second arc surface; 600-a second spoiler; 700-pressure detection means; 910-a workbench; 920-wind source.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, refer to the orientation or positional relationship as shown in the drawings, or as conventionally placed in use of the product of the application, or as conventionally understood by those skilled in the art, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application.

Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Examples

Referring to fig. 1 and fig. 2 in combination, the present embodiment provides an air volume calibration device 10, where the air volume calibration device 10 includes an air duct 100, a first spoiler 200, a ventilation plate 300, a speed measuring device 400, and a base 500. The base 500 supports the air duct 100, and the air duct 100 has an air inlet end 121, and the air inlet end 121 is used for installing an air source 920. The first spoiler 200 is connected to the duct 100. The ventilation plate 300 is connected to the air duct 100, and the ventilation plate 300 is located on a side of the first spoiler 200 away from the air inlet end 121. The speed measuring device 400 is installed at the vent panel 300, the speed measuring device 400 has a first vent hole 410, and the speed measuring device 400 is used for measuring the flow rate of the air current passing through the first vent hole 410. This amount of wind calibration device 10 is through setting up dryer 100, collects the air current that the wind regime 920 blew out, breaks up the air current through first spoiler 200 for the air current in the dryer 100 is even stable, forms linear wind speed, and at this moment, the rethread is installed the speed sensor 400 on ventilating board 300 and is detected the wind speed, reachs the wind speed, multiplies with draught area, can obtain the amount of wind. The air quantity calibration device 10 is simple in structure and low in cost, and can conveniently measure the air quantity of the air source 920.

In some embodiments, the wind duct 100 further has an air outlet end 131 arranged opposite to the air inlet end 121 in an axial direction thereof. In the axial direction, the ventilation board 300 is spaced from the air outlet end 131. The ventilating board 300 is located between the air inlet end 121 and the air outlet end 131, and wind can not be diffused rapidly through the ventilating board 300, so that the reading accuracy of the speed measuring device 400 is improved.

Optionally, a plurality of second ventilation holes 310 are uniformly distributed circumferentially around the first ventilation hole 410 on the ventilation board 300. Specifically, the ventilation board 300 is provided with a mounting hole for mounting the speed measuring device 400. The speed measuring device 400 is mounted to the mounting hole. The mounting hole is located at the center of the ventilation board 300, and the axis of the mounting hole coincides with the axis of the air duct 100. When the speed measuring device 400 is installed in the installation hole, the first vent hole 410 is located at the center of the vent plate 300, and the axis of the first vent hole 410 coincides with the axis of the air duct 100. The plurality of second vent holes 310 are circumferentially and uniformly distributed on the vent plate 300 centering on the first vent hole 410. Through evenly seting up a plurality of second ventholes 310 on ventilating board 300 for the air current can be discharged from second venthole 310, and increase area for ventilate, be convenient for ventilate fast. In addition, since the plurality of second vent holes 310 are circumferentially and uniformly opened with the first vent hole 410 as a center, the flow rate of the air flow passing through each second vent hole 310 is equal to the flow rate of the air flow passing through the first vent hole 410. Therefore, the flow rate of the second vent hole 310 can be represented by the flow rate of the first vent hole 410, and the air volume can be obtained by multiplying the total vent area by the flow rate of the first vent hole 410.

In some embodiments, the second vent hole 310 is an elongated hole, and the second vent hole 310 extends along a radial direction of the air duct 100. Through setting up second venthole 310 to radial extension along dryer 100, further increase draught area, the quick ventilation of being convenient for adapts to the great wind regime 920 of amount of wind more. In other embodiments, the second ventilation holes 310 are round holes, and a plurality of round holes are distributed on the ventilation board 300 at equal intervals along the circumferential direction of the air duct 100, and are also distributed on the ventilation board 300 at equal intervals along the radial direction of the air duct 100.

In another embodiment, the ventilation board 300 is provided with a mounting hole for mounting the speed measuring device 400. The speed measuring device 400 is mounted to the mounting hole. The ventilation board 300 is not provided with other through holes except for the mounting hole, that is, the airflow in the air duct 100 can only flow through the ventilation board 300 through the first ventilation hole 410 of the speed measuring device 400. Thus, the product of the airflow velocity of the first vent 410 and the cross-sectional area of the first vent 410 is the air volume of the air source 920.

Referring to fig. 1 in conjunction with fig. 2, in some embodiments, the air duct 100 includes a first duct section 110, a second duct section 120, and a third duct section 130, which are coaxially arranged. The first spoiler 200 is installed between the first and

second cylinder sections

110 and 120. A ventilation board 300 is installed between the second barrel section 120 and the third barrel section 130. Wherein, an air inlet end 121 is formed at one end of the first cylinder section 110 departing from the first spoiler 200. One end of the third cylindrical section 130 facing away from the ventilation board 300 forms an air outlet end 131. The air duct 100 is divided into the first, second and

third duct sections

110, 120 and 130, so that the first spoiler 200 and the vent plate 300 are conveniently installed.

Optionally, the first cylindrical section 110 has a connection end 122 opposite to the air intake end 121 in the axial direction, the connection end 122 is used for connecting with the first spoiler 200, and the diameter of the first cylindrical section 110 gradually increases from the air intake end 121 to the connection end 122. In other words, the first cylinder section 110 has a conical cylinder shape. The smaller end of the first cylindrical section 110 is an air inlet end 121, and the larger end of the second cylindrical section 120 is a connecting end 122. Through connecting wind source 920 on the air inlet end 121 that the diameter is less, connect first spoiler 200 on the great link 122 of diameter, like this, the air current that wind source 920 produced is through first section of thick bamboo 110 back, and the air current scope is enlarged, is favorable to the air current to pass through ventilating board 300, is convenient for measure the air current flow.

Referring to fig. 2, in some embodiments, the lower end of the base 500 is detachably connected to the table 910. The upper end of the base 500 is formed with a first arc surface 540 and a second arc surface 550 along the axial direction of the air duct 100. The first arc 540 is matched with the outer circumference of the second cylinder section 120 for accommodating and mounting the second cylinder section 120. The second curved surface 550 is matched with the outer peripheral surface of the third cylinder section 130 for accommodating and mounting the third cylinder section 130. Optionally, the axial dimension of the second barrel section 120 is equal to the axial dimension of the third barrel section 130, and the lengths of the first arc 540 and the second arc 550 in the axial direction of the air duct 100 are equal. By making the axial dimension of the second cylinder section 120 equal to the axial dimension of the third cylinder section 130, it is convenient to ensure that the airflow is uniform and stable across the ventilation board 300. The inner diameter of the second cylinder section 120 is equal to the inner diameter of the third cylinder section 130, the outer diameter of the second cylinder section 120 is equal to the outer diameter of the third cylinder section 130, and the radians of the first arc surface 540 and the second arc surface 550 are equal. By making the inner diameter of the second cylinder section 120 equal to the inner diameter of the third cylinder section 130, it is convenient to ensure that the airflow is uniform and stable across the ventilation board 300.

In the above embodiment, the air duct 100 includes the first duct section 110, the second duct section 120, and the third duct section 130, which are coaxially arranged. The first spoiler 200 is installed between the first and

second cylinder sections

110 and 120. A ventilation board 300 is installed between the second barrel section 120 and the third barrel section 130. In another embodiment, the wind duct 100 includes a cylinder, one end of the cylinder is a wind inlet end 121, and the other end opposite to the wind inlet end 121 in the axial direction of the cylinder is a wind outlet end 131. The first and

second spoilers

200 and 600 are mounted in the cylinder. The first spoiler 200 is located between the air inlet end 121 and the ventilation plate 300, and the ventilation plate 300 is located between the first spoiler 200 and the air outlet end 131.

Referring to fig. 1 and fig. 2, in some embodiments, the air volume calibration device 10 includes a second spoiler 600, and the second spoiler 600 is connected to the air outlet end 131. The ventilation plate 300 is located between the first spoiler 200 and the second spoiler 600. Through installing second spoiler 600 in air-out end 131, can make the air current velocity of flow in dryer 100 remain stable, increase measurement accuracy.

Referring to fig. 2, the base 500 is provided with an air volume display 510 and a power plug 530, and the power plug 530 is electrically connected to the air volume display 510 and the speed measuring device 400 to supply power to the air volume display 510 and the speed measuring device 400. The speed measuring device 400 sends the collected airflow velocity of the first vent 410 to the airflow display 510, an airflow calculation formula (the ventilation area is a fixed value, and the total size of the ventilation area is the sum of the cross-sectional areas of the first vent 410 and the second vent 310) is stored in the airflow display 510, and the size of the airflow of the air source 920 is the product of the airflow velocity of the first vent 410 and the ventilation area. After the calculation of the air volume display 510, the final value of the air volume is displayed on the display screen, so as to check whether the performance of the air source 920 is qualified.

In some embodiments, the air volume calibration apparatus 10 includes a pressure detection apparatus 700, and the pressure detection apparatus 700 is used for detecting the pressure in the air duct 100. The base 500 further has a differential pressure indicator 520, and the differential pressure indicator 520 is connected to the pressure detecting device 700. Optionally, the pressure detection device 700 has a sampling tube in communication with the first barrel section 110 for collecting the pressure within the first barrel section 110 and a static pressure tube for collecting atmospheric pressure. The differential pressure display 520 calculates the difference between the pressure in the first barrel section 110 and atmospheric pressure and displays it on a display screen. The pressure inside the wind tunnel 100 is detected by the pressure detection device 700, and then compared with the atmospheric pressure, and the wind pressure, another important performance index of the wind source 920, can be obtained through calculation.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An air volume calibration device, characterized in that, air volume calibration device includes:

the air duct is provided with an air inlet end, and the air inlet end is used for mounting an air source;

the first spoiler is connected with the air duct;

the ventilation plate is connected to the air duct and is positioned on one side, away from the air inlet end, of the first spoiler;

the speed measuring device is installed in the ventilating board, the speed measuring device has first ventilation hole, the speed measuring device is used for measuring the velocity of flow through the air current in first ventilation hole.

2. The air volume calibration device according to claim 1, wherein a plurality of second vent holes are uniformly circumferentially distributed on the vent plate with the first vent hole as a center.

3. The air volume calibration device as claimed in claim 2, wherein the second vent hole extends along a radial direction of the air duct.

4. The air volume calibration device according to claim 1, wherein the air duct further has an air outlet end arranged opposite to the air inlet end in an axial direction of the air duct, and the ventilation plate is spaced from the air outlet end in the axial direction.

5. The air volume calibration device according to claim 4, wherein the air duct comprises a first barrel section, a second barrel section and a third barrel section which are coaxially arranged;

the first spoiler is arranged between the first cylinder section and the second cylinder section;

the ventilation plate is arranged between the second cylinder section and the third cylinder section;

the first cylinder section is provided with a first spoiler, and one end, deviating from the first spoiler, of the first cylinder section forms the air inlet end; one end of the third cylinder section deviating from the ventilating plate forms the air outlet end.

6. The air volume calibration device according to claim 5, wherein the first cylindrical section has a connection end opposite to the air intake end in the axial direction, the connection end is used for connecting with the first spoiler, and the diameter of the first cylindrical section gradually increases from the air intake end to the connection end.

7. The air volume calibration device as recited in claim 5, wherein the axial dimension of the second cylinder section is equal to the axial dimension of the third cylinder section.

8. The air volume calibration device as recited in claim 7, wherein the inner diameter of the second cylinder section is equal to the inner diameter of the third cylinder section.

9. The air volume calibration device according to claim 4, wherein the air volume calibration device comprises a second spoiler, and the second spoiler is connected to the air outlet end.

10. The air volume calibration device according to claim 1, wherein the air volume calibration device comprises a pressure detection device, and the pressure detection device is configured to detect a pressure inside the air duct.