Air volume display vent and air volume detection method

Abstract

The present invention relates to the technical field of air volume measurement of air outlet frames, and discloses an air volume display air outlet and an air volume testing method, including an air outlet frame, a measuring piece, a fixing frame, an air pipe connector and an air volume display, wherein the measuring piece is arranged in the air outlet frame and fixed on both sides by a fixing frame and an air pipe connector respectively; the fixing frame blocks 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 connector is provided with two air outlet pipe joints, and the two air outlet pipe joints are respectively sealed and connected with the total pressure average pipe orifice or the static pressure average pipe orifice on one side facing the measuring piece, and the other sides of the two air outlet pipe joints are respectively connected to the air volume display through the air pipe. The beneficial effects of the present invention are: on the one hand, it has the function of measuring and displaying the air volume in the pipeline, and on the other hand, it can replace the air outlet frame of the existing duct-type air supply device, and has the effects of low cost and less space occupation.

Description

Technical Field

[0001] The invention relates to the technical field of air volume measurement of an air outlet frame, and in particular to a method for detecting the air volume of an air outlet with an air volume display. Background Art

[0002] In ducted air supply devices such as central air conditioners and fresh air systems, it is usually necessary to detect the air volume of the air outlet in order to control it; the current wind speed and air volume measurement device adopts the technical means of connecting multiple pitot tubes to the high-pressure average inner cavity and the low-pressure average inner cavity, and then connecting them to the external micro-pressure difference sensor transmitter through the channel tube after obtaining an average value, and calculating the average value of wind speed and air volume. The wind volume measurement device with this structure is high in cost on the one hand, and large in size on the other hand, and is relatively cumbersome to install and use. Summary of the invention

[0003] In order to overcome the above-mentioned defects, the present invention provides an air volume display vent.

[0004] In order to overcome the above defects, the present invention provides a method for detecting the air volume of an air volume display vent.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: a wind volume display vent, comprising an vent frame, a measuring piece, a fixing frame, an air pipe connector and an air volume display, wherein the measuring piece is arranged in the vent frame, wherein one end thereof is fixed to the inner wall of one side of the vent frame by the fixing frame, and the other end thereof is fixed to the inner wall of the other side of the vent frame by the air pipe connector; the measuring piece 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 blocks the total pressure average pipe hole and the static pressure average pipe hole at the end of the measuring piece on its side; the air pipe connector is provided with two air outlet pipe joints, and the two air outlet pipe joints are respectively sealed and connected with the total pressure average pipe hole or the static pressure average pipe hole facing the side of the measuring piece, and the other sides of the two air outlet pipe joints are respectively connected to the air volume display through the air pipe.

[0006] Preferably, the measuring piece is provided with a total pressure averaging tube hole, a static pressure averaging tube hole and a temperature compensation tube hole which are parallel in the length direction, the windward surface of the measuring piece is provided with a total pressure hole connected to the total pressure averaging tube hole, the side wall of the measuring piece is provided with a static pressure hole which passes through the static pressure averaging tube hole, and the plane where the static pressure hole is located is perpendicular to the plane where the total pressure hole is located.

[0007] Preferably, the measuring piece is provided with a total pressure averaging tube hole, a static pressure averaging tube hole and a temperature compensation tube hole which are parallel in length direction; the windward surface of the measuring piece is provided with a total pressure long hole groove connected to the total pressure averaging tube hole, and the length of the total pressure long hole groove is the same as that of the total pressure averaging tube hole; a static pressure long hole groove penetrating the static pressure averaging tube hole is provided on the side wall of the measuring piece, and the length of the static pressure long hole groove is the same as that of the total pressure averaging tube hole; a connecting piece passing through the axis line is provided in the static pressure long hole groove; the plane where the static pressure long hole groove is located is perpendicular to the plane where the total pressure long hole groove is located; the connecting piece and the total pressure long hole groove are located in the same plane and connect the two parts of the static pressure averaging tube hole divided by the static pressure long hole groove.

[0008] The present invention also provides a method for detecting air volume, comprising the following steps:

[0009] 1) Install the air volume display vent at the air outlet of the air supply duct; make sure the windward side of the measuring piece faces the air flow direction of the air supply duct;

[0010] 2) Measure the total pressure in the air supply duct through the total pressure average pipe hole;

[0011] 3) Measure the static pressure in the air supply duct through the static pressure average pipe hole;

[0012] 4) The air volume is obtained by the following formulas (1), (2) and (3);

[0013] Total pressure - static pressure = dynamic pressure (1)

[0014] Dynamic pressure = 0.5 × air density (kg / m3) × wind speed (m / s) squared (2)

[0015] Wind speed × air volume shows that the effective cross-sectional area of ​​the air outlet = air volume (3).

[0016] In practical applications, the air volume detection method can be integrated into an air volume display and the final result air volume can be displayed. The integration method belongs to the prior art, for example, the algorithm and program are burned into the chip of the air volume display to realize automatic power-on testing and display.

[0017] The beneficial effects of the present invention are as follows: the air volume display vent of the present application, on the one hand, has the function of measuring and displaying the air volume in the pipeline, and on the other hand, can replace the outlet frame of the existing duct-type air supply device, with the effects of low cost and small space occupation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the air volume display tuyere structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the test piece structure of Example 1 of the present invention.

[0020] Figure 3 for Figure 2Cross-sectional view of .

[0021] Figure 4 This is a schematic diagram of the test piece structure of Example 2 of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with specific embodiments.

[0023] Example 1

[0024] like Figure 1 Figure 2 Figure 3 The air volume display vent shown in the figure comprises an air volume display vent frame 1, a measuring piece 2, a fixing frame 3, an air pipe connector 4 and an air volume display 5, wherein the measuring piece 2 is horizontally arranged in the air volume display frame 1, wherein one end thereof is fixed to the inner wall of one side of the air volume display frame 1 by the fixing frame 3, and the other end thereof is fixed to the inner wall of the other side of the air volume display frame 1 by the air pipe connector 4; the measuring piece 2 is provided with a total pressure average pipe hole 201 and a static pressure average pipe hole 202 which are parallel in the length direction, and the fixing frame 3 seals and blocks the total pressure average pipe hole and the static pressure average pipe hole of the measuring piece end on its side; the air pipe connector 4 is provided with two air outlet pipe joints, and the two air outlet pipe joints are respectively sealed and connected with the total pressure average pipe hole or the static pressure average pipe hole facing the measuring piece side, and the other sides of the two air outlet pipe joints are respectively connected to the air volume display 5 through the air pipe.

[0025] In this embodiment, the measuring piece 2 is provided with a total pressure averaging tube hole 201, a static pressure averaging tube hole 202 and a temperature compensation tube hole 203 which are parallel in the length direction, the windward surface of the measuring piece is provided with a total pressure hole 204 connected to the total pressure averaging tube hole, and the side wall of the measuring piece is provided with a static pressure hole 205 which penetrates the static pressure averaging tube hole, and the plane where the static pressure hole 205 is located is perpendicular to the plane where the total pressure hole 204 is located.

[0026] The number and distribution of the total pressure holes 204 and the static pressure holes 205 shall be in accordance with GB / T1236-2017 or

[0027] GB / T50243-2016 or GB51251-2017 settings.

[0028] The air volume calculation method is: the dynamic pressure is obtained by subtracting the static pressure measured by the average static pressure hole from the total pressure measured by the average total pressure hole, and then the wind speed is calculated based on the dynamic pressure. The air volume is then obtained by multiplying the wind speed by the cross-sectional area. It can be automatically calculated and detected online.

[0029] Example 2

[0030] like Figure 1 Figure 4The air volume display vent shown in the figure comprises an air volume display vent frame 1, a measuring piece 2, a fixing frame 3, an air pipe connector 4 and an air volume display 5, wherein the measuring piece 2 is horizontally arranged in the air volume display frame 1, wherein one end thereof is fixed to the inner wall of one side of the air volume display frame 1 by the fixing frame 3, and the other end thereof is fixed to the inner wall of the other side of the air volume display frame 1 by the air pipe connector 4; the measuring piece 2 is provided with a total pressure average pipe hole 201 and a static pressure average pipe hole 202 which are parallel in the length direction, and the fixing frame 3 seals and blocks the total pressure average pipe hole and the static pressure average pipe hole of the measuring piece end on its side; the air pipe connector 4 is provided with two air outlet pipe joints, and the two air outlet pipe joints are respectively sealed and connected with the total pressure average pipe hole or the static pressure average pipe hole facing the measuring piece side, and the other sides of the two air outlet pipe joints are respectively connected to the air volume display 5 through the air pipe.

[0031] The measuring piece 2 is provided with a total pressure averaging tube hole 201, a static pressure averaging tube hole 202 and a temperature compensation tube hole 203 which are parallel in length direction; the windward surface of the measuring piece is provided with a total pressure long hole groove 206 connected to the total pressure averaging tube hole, and the length of the total pressure long hole groove is the same as that of the total pressure averaging tube hole; the side wall of the measuring piece is provided with a static pressure long hole groove 207 penetrating the static pressure averaging tube hole, and the length of the static pressure long hole groove is the same as that of the total pressure averaging tube hole, and a connecting piece passing through the axis line is provided in the static pressure long hole groove; the plane where the static pressure long hole groove is located is perpendicular to the plane where the total pressure long hole groove is located; the connecting piece and the total pressure long hole groove are located in the same plane and connect the two parts of the static pressure averaging tube hole divided by the static pressure long hole groove.

[0032] This structure adopts static pressure long hole slots and total pressure long hole slots with full through slots, which further optimizes the cumbersome processing problem caused by the need to set the total pressure holes and static pressure holes at fixed points and distances in Example 1. At the same time, the air intake is more uniform and the measurement accuracy is higher.

[0033] Example 3

[0034] A method for detecting air volume comprises the following steps:

[0035] 1) Install the air volume display vent shown in Example 1 or 2 at the air outlet of the air supply duct; make the windward side of the measuring piece face the air flow direction of the air supply duct;

[0036] 2) Measure the total pressure in the air supply duct through the total pressure average pipe hole;

[0037] 3) Measure the static pressure in the air supply duct through the static pressure average pipe hole;

[0038] 4) The air volume is obtained by the following formulas (1), (2) and (3);

[0039] Total pressure - static pressure = dynamic pressure (1)

[0040] Dynamic pressure = 0.5 × air density (kg / m3) × wind speed (m / s) squared (2)

[0041] Wind speed × air volume shows that the effective cross-sectional area of ​​the air outlet = air volume (3).

[0042] In practical applications, the air volume detection method can be integrated into an air volume display and the final result air volume can be displayed. The integration method belongs to the prior art, for example, the algorithm and program are burned into the chip of the air volume display to realize automatic power-on testing and display.

[0043] The technical solution of the present invention is not limited to the above-mentioned specific embodiments. All technical variations made according to the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. An air volume display tuyere, comprising a tuyere frame, a measuring piece, a fixing frame, an air pipe connector and an air volume display, characterized in that: The measuring piece is arranged in the air outlet frame, wherein one end is fixed to the inner wall of one side of the air outlet frame by a fixing frame, and the other end is fixed to the inner wall of the other side of the air outlet frame by an air pipe connector; the measuring piece is provided with a total pressure averaging tube hole and a static pressure averaging tube hole which are parallel in length direction; the measuring piece is provided with a total pressure averaging tube hole, a static pressure averaging tube hole and a temperature compensation tube hole which are parallel in length direction; the windward surface of the measuring piece is provided with a total pressure long hole groove which is connected to the total pressure averaging tube hole, and the length of the total pressure long hole groove is the same as that of the total pressure averaging tube hole; the side wall of the measuring piece is provided with a static pressure long hole groove which passes through the static pressure averaging tube hole, and the length of the static pressure long hole groove is the same as that of the total pressure averaging tube hole The holes of the pressure averaging pipe are the same, and a connecting piece passing through the axis is provided in the static pressure long hole groove; the plane where the static pressure long hole groove is located is perpendicular to the plane where the total pressure long hole groove is located; the connecting piece and the total pressure long hole groove are located in the same plane and connect the two parts of the static pressure averaging pipe hole divided by the static pressure long hole groove; the fixing frame seals the total pressure averaging pipe hole and the static pressure averaging pipe hole at the end of the measuring piece on its side; the air pipe connecting piece is provided with two air outlet pipe joints, and the two air outlet pipe joints are sealed and connected with the total pressure averaging pipe hole or the static pressure averaging pipe hole facing the measuring piece, and the other sides of the two air outlet pipe joints are connected to the air volume display through the air pipe; The air volume detection method comprises the following steps: 1) Install the air volume display vent at the air outlet of the air supply duct; make the windward side of the measuring piece face the air flow direction of the air supply duct; 2) The total pressure in the air supply duct is measured through the total pressure average pipe hole; 3) Measure the static pressure in the air supply duct through the static pressure average pipe hole; 4) The air volume is obtained by the following formulas (1), (2) and (3); Total pressure - static pressure = dynamic pressure (1) Dynamic pressure = 0.5 × air density × wind speed squared (2) Wind speed × air volume shows the effective cross-sectional area of ​​the air outlet = air volume (3) The unit of air density is kg / m 3 , the unit of wind speed is m / s.

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