CN111157062A - Air quantity display air port and air quantity detection method - Google Patents
Air quantity display air port and air quantity detection method Download PDFInfo
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- CN111157062A CN111157062A CN202010164429.XA CN202010164429A CN111157062A CN 111157062 A CN111157062 A CN 111157062A CN 202010164429 A CN202010164429 A CN 202010164429A CN 111157062 A CN111157062 A CN 111157062A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
Abstract
The invention relates to the technical field of air quantity measurement of an air port frame and discloses an air quantity display air port and an air quantity testing method, which comprise an air port frame, a measuring sheet, a fixing frame, an air pipe connecting piece and an air quantity display, wherein the measuring sheet is arranged in the air port frame, and two sides of the measuring sheet are respectively fixed through the fixing frame and the air pipe connecting piece; the fixing frame seals the total pressure average pipe orifice and the static pressure average pipe orifice on the side where the fixing frame is located; the air pipe connecting piece is provided with two air outlet pipe joints, one sides of the two air outlet pipe joints, facing the measuring sheet, are respectively communicated with the total pressure average pipe orifice or the static pressure average pipe orifice in a sealing mode, and the other sides of the two air outlet pipe joints are respectively communicated with the air volume display through air pipes. The invention has the beneficial effects that: on one hand, the air quantity in the pipeline is measured and displayed, on the other hand, the air outlet frame of the existing pipeline type air supply device can be replaced, and the air outlet frame has the effects of low cost and small occupied space.
Description
Technical Field
The invention relates to the technical field of air quantity measurement of air port frames, in particular to an air quantity display air port air quantity detection method.
Background
In a pipeline type air supply device such as a central air conditioner, a fresh air system and the like, the air quantity detection of the outlet air is generally needed so as to control the outlet air; the current wind speed and wind volume measuring device adopts the technical means that a plurality of pitot tubes are connected to a high-pressure average inner cavity and a low-pressure average inner cavity, an average value is obtained and then is connected with an external micro-differential pressure sensing transmitter through a channel tube, and the average value of the wind speed and the wind volume is calculated. The air quantity measuring device with the structure has the advantages of high cost, large volume and more complicated installation and use.
Disclosure of Invention
In order to overcome the defects, the invention provides the air quantity display air port.
In order to overcome the defects, the invention provides an air quantity detection method of an air quantity display air port.
In order to achieve the purpose, the technical scheme of the invention is as follows: an air quantity display air port comprises an air port frame, a measuring piece, a fixing frame, an air pipe connecting piece and an air quantity display, wherein the measuring piece is arranged in the air port frame, one end of the measuring piece is fixed on the inner wall of one side of the air port frame through the fixing frame, and the other end of the measuring piece is fixed on the inner wall of the other side of the air port frame through the air pipe connecting piece; the measuring sheet is provided with a total pressure average pipe hole and a static pressure average pipe hole which are parallel in the length direction, and the fixing frame seals and seals a total pressure average pipe hole opening and a static pressure average pipe hole opening of the end of the measuring sheet on the side where the fixing frame is located; the air pipe connecting piece is provided with two air outlet pipe joints, one sides of the two air outlet pipe joints, facing the measuring sheet, are respectively communicated with the total pressure average pipe orifice or the static pressure average pipe orifice in a sealing mode, and the other sides of the two air outlet pipe joints are respectively communicated with the air volume display through air pipes.
Preferably, the measuring piece is provided with a total pressure average tube hole, a static pressure average tube hole and a temperature compensation tube hole which are parallel in the length direction, a total pressure hole communicated with the total pressure average tube hole is formed in the windward side of the measuring piece, a static pressure hole penetrating through the static pressure average tube hole is formed in the side wall of the measuring piece, and the plane where the static pressure hole is located is perpendicular to the plane where the total pressure hole is located.
Preferably, the measuring sheet is provided with a total pressure average tube hole, a static pressure average tube hole and a temperature compensation tube hole which are parallel to each other in the length direction, a total pressure long hole groove communicated with the total pressure average tube hole is formed in the windward side of the measuring sheet, and the length of the total pressure long hole groove is the same as that of the total pressure average tube hole; the side wall of the measuring piece is provided with a static pressure long hole groove which penetrates through the static pressure average pipe hole, the length of the static pressure long hole groove is the same as that of the total pressure average pipe hole, and a connecting piece passing through an axis is arranged in the static pressure long hole groove; the plane of the static pressure long hole groove is vertical to the plane of the total pressure long hole groove; the connecting piece and the total pressure long hole groove are positioned on the same plane and are connected with two static pressure average pipe holes divided by the static pressure long hole groove.
The invention also provides an air quantity detection method, which comprises the following steps:
1) installing an air quantity display air port at an air outlet of an air supply pipeline; the windward side of the measuring sheet is opposite to the wind flow direction of the air supply pipeline;
2) measuring the total pressure in the air supply pipeline through the total pressure average pipe hole;
3) measuring the static pressure in the air supply pipeline through the static pressure averaging pipe hole;
4) obtaining the air volume by the following formula (1), formula (2) and formula (3);
full pressure-static pressure = dynamic pressure (1)
Dynamic pressure =0.5 × air density (kg/m3) × wind speed (m/s) square (2)
Wind speed × wind volume shows the effective sectional area of the tuyere = wind volume (3).
In practical application, the air volume detection method can be integrated into an air volume display and the final result air volume is displayed, and the integration method belongs to the prior art, for example, an algorithm and a program are burned into a chip of the air volume display to realize automatic test and display during starting.
The invention has the beneficial effects that: the utility model provides an amount of wind shows wind gap has the effect of measurement and demonstration to the amount of wind in the pipeline on the one hand, and on the other hand can replace current pipeline formula air supply arrangement's air outlet frame, has with low costs, the little effect of occupation space.
Drawings
FIG. 1 is a schematic view of the structure of the air quantity display tuyere of the present invention.
Fig. 2 is a schematic view of a test strip structure in embodiment 1 of the present invention.
Fig. 3 is a cross-sectional view of fig. 2.
Fig. 4 is a schematic view of a test strip structure in embodiment 2 of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1
The air quantity display air port shown in fig. 1, fig. 2 and fig. 3 comprises an air port frame 1, a measuring piece 2, a fixing frame 3, an air pipe connecting piece 4 and an air quantity display 5, wherein the measuring piece 2 is transversely arranged in the air port frame 1, one end of the measuring piece is fixed on the inner wall of one side of the air port frame 1 through the fixing frame 3, and the other end of the measuring piece is fixed on the inner wall of the other side of the air port frame 1 through the air pipe connecting piece 4; the measuring sheet 2 is provided with a total pressure average tube hole 201 and a static pressure average tube hole 202 which are parallel in the length direction, and the fixing frame 3 seals and seals a total pressure average tube hole opening and a static pressure average tube hole opening of the measuring sheet end on the side where the fixing frame is located; the air pipe connecting piece 4 is provided with two air outlet pipe joints, one sides of the two air outlet pipe joints facing the measuring piece are respectively communicated with the total pressure average pipe orifice or the static pressure average pipe orifice in a sealing mode, and the other sides of the two air outlet pipe joints are respectively communicated with the air volume display 5 through air pipes.
In this embodiment, the measuring piece 2 is provided with a total pressure average pipe hole 201, a static pressure average pipe hole 202 and a temperature compensation pipe hole 203 which are parallel in the length direction, a total pressure hole 204 communicated with the total pressure average pipe hole is arranged on the windward side of the measuring piece, a static pressure hole 205 penetrating through the static pressure average pipe hole is arranged on the side wall of the measuring piece, and the plane of the static pressure hole 205 is perpendicular to the plane of the total pressure hole 204.
The total pressure holes 204 and the static pressure holes 205 are arranged in the number and the distribution positions according to GB/T1236-2017 or
GB/T50243-2016 or GB 51251-2017.
The air volume calculation method comprises the following steps: the static pressure measured by the static pressure average pipe hole is subtracted from the total pressure measured by the total pressure average pipe hole to obtain the dynamic pressure, then the wind speed is calculated according to the dynamic pressure, the wind volume is obtained according to the multiplication of the wind speed and the sectional area, and the on-line calculation and detection can be automatically carried out.
Example 2
The air quantity display air port shown in fig. 1 and fig. 4 comprises an air port frame 1, a measuring piece 2, a fixing frame 3, an air pipe connecting piece 4 and an air quantity display 5, wherein the measuring piece 2 is transversely arranged in the air port frame 1, one end of the measuring piece is fixed on the inner wall of one side of the air port frame 1 through the fixing frame 3, and the other end of the measuring piece is fixed on the inner wall of the other side of the air port frame 1 through the air pipe connecting piece 4; the measuring sheet 2 is provided with a total pressure average tube hole 201 and a static pressure average tube hole 202 which are parallel in the length direction, and the fixing frame 3 seals and seals a total pressure average tube hole opening and a static pressure average tube hole opening of the measuring sheet end on the side where the fixing frame is located; the air pipe connecting piece 4 is provided with two air outlet pipe joints, one sides of the two air outlet pipe joints facing the measuring piece are respectively communicated with the total pressure average pipe orifice or the static pressure average pipe orifice in a sealing mode, and the other sides of the two air outlet pipe joints are respectively communicated with the air volume display 5 through air pipes.
The measuring piece 2 is provided with a total pressure average tube hole 201, a static pressure average tube hole 202 and a temperature compensation tube hole 203 which are parallel in the length direction, the windward side of the measuring piece is provided with a total pressure long hole groove 206 communicated with the total pressure average tube hole, and the length of the total pressure long hole groove is the same as that of the total pressure average tube hole; a static pressure long hole groove 207 penetrating through the static pressure average pipe hole is formed in the side wall of the measuring piece, the length of the static pressure long hole groove is the same as that of the total pressure average pipe hole, and a connecting piece passing through an axis is arranged in the static pressure long hole groove; the plane of the static pressure long hole groove is vertical to the plane of the total pressure long hole groove; the connecting piece and the total pressure long hole groove are positioned on the same plane and are connected with two static pressure average pipe holes divided by the static pressure long hole groove.
This structure adopts the static pressure slot and total pressure slot of all-through groove, has further optimized among embodiment 1 that need the fixed point distance to set up the loaded down with trivial details problem of processing that total pressure hole and static pressure hole cause, and the air inlet is more even simultaneously, and measurement accuracy is higher.
Example 3
An air volume detection method comprises the following steps:
1) installing the air quantity display air opening shown in the embodiment 1 or 2 at an air outlet of an air supply pipeline; the windward side of the measuring sheet is opposite to the wind flow direction of the air supply pipeline;
2) measuring the total pressure in the air supply pipeline through the total pressure average pipe hole;
3) measuring the static pressure in the air supply pipeline through the static pressure averaging pipe hole;
4) obtaining the air volume by the following formula (1), formula (2) and formula (3);
full pressure-static pressure = dynamic pressure (1)
Dynamic pressure =0.5 × air density (kg/m3) × wind speed (m/s) square (2)
Wind speed × wind volume shows the effective sectional area of the tuyere = wind volume (3).
In practical application, the air volume detection method can be integrated into an air volume display and the final result air volume is displayed, and the integration method belongs to the prior art, for example, an algorithm and a program are burned into a chip of the air volume display to realize automatic test and display during starting.
The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.
Claims (4)
1. The utility model provides an amount of wind shows wind gap, includes wind gap frame, surveys piece, mount, trachea connecting piece and amount of wind display, its characterized in that: the measuring sheet is arranged in the air port frame, one end of the measuring sheet is fixed on the inner wall of one side of the air port frame through a fixing frame, and the other end of the measuring sheet is fixed on the inner wall of the other side of the air port frame through an air pipe connecting piece; the measuring sheet is provided with a total pressure average pipe hole and a static pressure average pipe hole which are parallel in the length direction, and the fixing frame seals and seals a total pressure average pipe hole opening and a static pressure average pipe hole opening of the end of the measuring sheet on the side where the fixing frame is located; the air pipe connecting piece is provided with two air outlet pipe joints, one sides of the two air outlet pipe joints, facing the measuring sheet, are respectively communicated with the total pressure average pipe orifice or the static pressure average pipe orifice in a sealing mode, and the other sides of the two air outlet pipe joints are respectively communicated with the air volume display through air pipes.
2. The air quantity display tuyere of claim 1, characterized in that: the measuring piece is provided with a total pressure average tube hole, a static pressure average tube hole and a temperature compensation tube hole which are parallel in the length direction, a total pressure hole communicated with the total pressure average tube hole is formed in the windward side of the measuring piece, a static pressure hole penetrating through the static pressure average tube hole is formed in the side wall of the measuring piece, and the plane where the static pressure hole is located is perpendicular to the plane where the total pressure hole is located.
3. The air quantity display tuyere of claim 1, characterized in that: the wind-facing surface of the measuring piece is provided with a total-pressure long hole groove communicated with the total-pressure average hole, and the length of the total-pressure long hole groove is the same as that of the total-pressure average hole; the side wall of the measuring piece is provided with a static pressure long hole groove which penetrates through the static pressure average pipe hole, the length of the static pressure long hole groove is the same as that of the total pressure average pipe hole, and a connecting piece passing through an axis is arranged in the static pressure long hole groove; the plane of the static pressure long hole groove is vertical to the plane of the total pressure long hole groove; the connecting piece and the total pressure long hole groove are positioned on the same plane and are connected with two static pressure average pipe holes divided by the static pressure long hole groove.
4. An air volume detection method is characterized in that: the method comprises the following steps:
1) installing the air quantity display air opening of any one of claims 1 to 3 at the air outlet of the air supply pipeline; the windward side of the measuring sheet is opposite to the wind flow direction of the air supply pipeline;
2) measuring the total pressure in the air supply pipeline through the total pressure average pipe hole;
3) measuring the static pressure in the air supply pipeline through the static pressure averaging pipe hole;
4) obtaining the air volume by the following formula (1), formula (2) and formula (3);
full pressure-static pressure = dynamic pressure (1)
Dynamic pressure =0.5 × air density (kg/m)3) X wind speed (m/s) square (2)
Wind speed × wind volume shows the effective sectional area of the tuyere = wind volume (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010164429.XA CN111157062A (en) | 2020-03-11 | 2020-03-11 | Air quantity display air port and air quantity detection method |
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| CN202010164429.XA CN111157062A (en) | 2020-03-11 | 2020-03-11 | Air quantity display air port and air quantity detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112066938A (en) * | 2020-08-31 | 2020-12-11 | 重庆长安汽车股份有限公司 | Method for measuring effective area of through opening |
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- 2020-03-11 CN CN202010164429.XA patent/CN111157062A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112066938A (en) * | 2020-08-31 | 2020-12-11 | 重庆长安汽车股份有限公司 | Method for measuring effective area of through opening |
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