KR102124147B1 - A air flow meter with flexible duct bandless connecting apparatus - Google Patents

Abstract

The present invention relates to an air flow measurement apparatus having a flexible duct bandless fastening device. The air flow measurement apparatus having the flexible duct bandless fastening device according to an embodiment of the present invention includes the bandless fastening device to fasten and connect a flexible duct which introduces external air into the air flow measurement apparatus in a bandless manner. Therefore, usability for measuring an air flow can be effectively improved.

Description

Air flow measuring device with flexible duct bandless fastening device {A AIR FLOW METER WITH FLEXIBLE DUCT BANDLESS CONNECTING APPARATUS}

The present invention relates to a device for measuring air flow. More specifically, it relates to an air volume measurement device for measuring the amount of wind (air volume) discharged from an air conditioning system of a vehicle, an air conditioning system inside a building, or an air conditioning system of a household appliance.

For example, a simple measurement method using a hot wire and a vane anemometer is used to measure the air volume of a car air conditioning system. However, the general anemometer has a problem that it is difficult to move easily because of its large volume and weight.

In order to solve this, a portable air flow meter was developed that adopted a nozzle of ANSI/ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.) 51-1999, but the portable air flow meter was internally operated in a low air flow measurement range. Since the measurement resistance is large due to the large flow resistance, and the flow is unstable in the high air flow range, the measurement error tends to be large, so it is necessary to improve it.

That is, the portable air flow meter according to the prior art is required to improve the measurement error occurring at low air flow (5 to 255 CMH) due to internal flow resistance and instability of flow. In addition, there is a problem in that the data processing speed is slow due to analog signal processing, and there is a problem in measurement, correction, and maintenance because there is no self-diagnosis and control correction function.

In addition, since the portable air flow meter according to the prior art does not compensate for the static pressure, there is a problem in that it is impossible to make an accurate measurement due to the change in the air volume of the outlet during measurement. It is difficult to measure the correct state value of.

Therefore, it can be seen through this that there is a need for technology development for the measurement of the air volume of an air conditioner having various aspects, and there is a market demand, but it is not able to meet the lack of technology, so precise measurement is possible, and it is lightweight and easy to manufacture. The development of an air flow measurement device is urgently required.

Republic of Korea Patent Publication No. 10-2004-0060126

An object of the present invention is to improve the fastening structure of the flexible duct for introducing external air into the air flow measurement device in a bandless manner, and to provide an air flow measurement device having a flexible duct free band fastening device for easy improvement. To provide.

In order to solve the above problem,

In the air flow measurement device having a flexible duct bandless fastening device according to an embodiment of the present invention, a nozzle cover is integrally formed at the front of which air is introduced from the outside, and a fixed cover at which a finishing cover is installed at the rear is integrally formed. It is, a cylindrical housing consisting of a handle integrally formed on the top;

An inlet cover installed in the front of the nozzle cover, formed through the axial direction to introduce air introduced from the outside into the cylindrical housing, and having a first rectifying plate installed therein;

A nozzle panel installed inside the nozzle cover and configured to detachably install a multi-nozzle composed of nozzles having different cross-sectional areas for measuring the amount of air passing through the first rectifying plate;

A second rectifying plate disposed at the rear of the nozzle panel and having a cylinder type opening and closing device for moving the damper forward and backward so as to open and close each nozzle through a damper;

A blower which is disposed at the rear of the second rectifying plate and is composed of a motor and an impeller that is connected to the motor and rotates to suck air passing through the second rectifying plate and discharge it to a discharge portion formed on a rear outer circumferential surface of the cylindrical housing; And

A bandless fastening device installed on the inflow cover to fasten the flexible duct in a bandless manner;

It includes,

The band-free fastening device comprises: a first and second cylindrical body formed integrally with a rear end screwed to the front of the inflow cover and spaced apart from one end of a flexible duct composed of a corrugated pipe;

A first fixing part protruding inside the first cylindrical body; And

Second and third fixing portions protruding from the outside of the second cylindrical body facing the first fixing portion and disposed to be staggered with the first fixing portion;

It may include.

In addition, in the air flow measurement device having a flexible duct bandless fastening device according to an embodiment of the present invention, it is connected through the inlet cover and the flexible duct to introduce external air to the cylindrical housing side, and measure the static pressure of the external air Pressure measuring unit integrated adapter;

Further comprising,

The pressure measuring unit integrated adapter is provided with an air inlet space in which external air is introduced, and a square frame-shaped fixed flange that prevents leakage of external air by fixing and closely fitting the pressure measuring unit integrated adapter to the measurement object is external to the pressure measuring unit. Adapter body provided; And

It is formed in a circular shape on the inside of the adapter body, and consists of a pressure measuring hole for measuring the pressure when the outside air passes and an average pressure port for measuring the average pressure of air entering the pressure measuring hole. Pressure measuring unit consisting of a positive pressure tab formed integrally with;

It may include.

In addition, in the air flow measurement device having a flexible duct bandless fastening device according to an embodiment of the present invention, a bandless fastening device may be integrally formed on the adapter body.

In addition, in the air flow measurement device having a flexible duct band-free fastening device according to an embodiment of the present invention, the pressure measuring unit integral adapter is an integral handle formed protruding on both sides of the adapter body;

It may further include.

In addition, in the air flow measurement device having a flexible duct bandless fastening device according to an embodiment of the present invention, the connecting means connecting the average pressure port and the sensor unit installed in the cylindrical housing is fixed to prevent flow. A ring portion protruding in a ring shape inside the inlet of the inlet cover;

It may further include.

In addition, in the air flow measurement device having a flexible duct bandless fastening device according to an embodiment of the present invention, the cylindrical housing is provided in front of the cylindrical housing to configure the sensor unit and the rear of the cylindrical housing The pressure measuring conduit connecting the rear sensor provided in may be integrally formed.

These solutions will become more apparent from the specific details for carrying out the following invention based on the accompanying drawings.

Prior to this, the terms or words used in the specification and claims should not be interpreted in a conventional and lexical sense, and the inventor may properly define the concept of terms in order to best describe his or her invention. Based on the principle of being able to be interpreted as meanings and concepts consistent with the technical spirit of the present invention.

According to an embodiment of the present invention, the flexible duct can be easily connected to the inlet cover by a bandless method through a bandless fastening device, thereby improving the convenience of use, thereby increasing the reliability of the airflow measuring device. have.

On the other hand, according to one embodiment of the present invention, the pressure measuring unit for measuring the static pressure of the external air is integrally formed in the integrated adapter for measuring the pressure connected to the cylindrical housing and the flexible duct, thereby enabling precise measurement of the static pressure.

In addition, according to an embodiment of the present invention, by forming the pressure measuring conduit integrally in the cylindrical housing, it is possible to manufacture using a 3D printer, thereby effectively reducing the cost and shortening the manufacturing period.

1 is a perspective view showing an exploded air flow measuring device having a flexible duct bandless fastening device according to an embodiment of the present invention.
Figure 2 is a perspective view showing the internal structure by partially cutting the air flow measuring device of Figure 1;
Figure 3 is a cross-sectional view showing the internal structure by partially cutting the air flow measuring device of Figure 1;
4 to 6 is a perspective view showing a main portion of the air flow measurement device having a flexible duct bandless fastening device according to an embodiment of the present invention.
7 is a perspective view showing an air flow measurement device having a flexible duct bandless fastening device according to an embodiment of the present invention.
Figure 8 is a perspective view showing a pressure measuring unit integral adapter of the air flow measurement device having a flexible duct bandless fastening device according to an embodiment of the present invention.
9 is a perspective view showing a cylindrical housing of an air flow measurement device having a flexible duct bandless fastening device according to an embodiment of the present invention.

The specific aspects and specific technical features of the present invention will become more apparent from the following specific contents and embodiments associated with the accompanying drawings. In addition, in addition to reference numerals to the components of each drawing in this specification, it should be noted that the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing an embodiment of the present invention, when it is determined that a detailed description of related known configurations or functions may obscure the subject matter of the present invention, the detailed description will be omitted.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected to or connected to the other component, but another component between each component It will be understood that elements may be "connected", "coupled" or "connected".

First, a basic design structure of an air flow measurement device having a flexible duct bandless fastening device according to an embodiment of the present invention was developed based on a measuring nozzle according to ANSI/ASHRAE 51-1999 standard.

As is well known, since air has the characteristics of a viscous fluid, for example, when discharging through a duct (Duct) or an impeller, it inevitably results in fluid separation or vortex due to the boundary layer effect, resulting in an airflow due to the average flow Measurement is virtually impossible.

In addition, according to the ANSI/ASHRAE 51-1999 standard, a certain distance must be provided before and after the nozzle, which is an air flow measurement sensor, and a pipe connected to the outside is required to install a positive pressure tap for measuring the pressure difference, so the device is also large and the outer pipe is maintained. There are difficulties in management. These factors are obstacles to miniaturization. To develop a portable air volume measurement device that is easy to measure in the field, it is necessary to develop a product that is small in size and has little damage during movement.

Therefore, in general, in the case of impellers of medium and large air volumes, in order to measure air volume or aerodynamic performance, after installing a special air plenum of ANSI/ASHRAE 51-1999 standard, use the multi-nozzle method or multi-point by the Pitot tube at the discharge part. After the measurement, it is averaged again to calculate the average flow rate, and converted to the air volume. As another method, it is measured by the method according to the differential pressure mechanism method according to ISO-5167.

In the present invention, all of the above problems are systematically solved, and it is envisioned to enable easy and precise measurement application in industrial fields. This is basically revealed in advance that the concept was based on the international standard industry standard ANSI/ASHRAE 51-1999 standard.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a combined air flow measuring device having a flexible duct bandless fastening device according to an embodiment of the present invention, the nozzle cover (10a) is formed integrally in the front, fixed cover at the rear ( 10b) is integrally formed, the bandless fastening device 50 is fastened to the inlet cover 11 installed in front of the cylindrical housing 10 provided with a handle 10c on the top, and the bandless fastening device ( The flexible duct 30 is connected to the front of the 50), and the pressure measuring unit integrated adapter 20 is connected to the front of the flexible duct 30 to show a coupling relationship.

FIG. 2 is a perspective view showing the internal structure by partially cutting the air flow measuring device of FIG. 1, the inner front of the cylindrical housing 10 in which the inlet cover 11 to which the bandless fastening device 50 is fastened is installed in the front. A first rectifying plate 14 is disposed on, a nozzle panel 12 is disposed behind the first rectifying plate 14, and a second rectifying plate 15 is disposed behind the nozzle panel 12. In addition, it shows a coupling relationship in which the blower 16 is disposed behind the second rectifying plate 15.

FIG. 3 is a partial cross-sectional view of the air flow measurement device of FIG. 1, showing the internal structure in a cross-sectional view. 20) shows the internal structure of the air volume measuring device for measuring the air volume of the outside air flowing through it.

4 to 6 is a perspective view showing a main portion of the air flow measurement device having a flexible duct bandless fastening device according to an embodiment of the present invention, the multi-nozzle 12a is detachably installed nozzle panel 12 A second rectifying plate 15 is installed at the rear of the damper 15a and the cylinder type opening and closing device 15b, and is provided with an impeller 16b and a motor 16a at the rear of the second rectifying plate 15. The configured blower 16 is disposed, and shows a coupling relationship in which the PCB 10f and the finishing cover 13 are disposed at the rear of the blower 16.

1 to 6, the air flow measurement device having a flexible duct bandless fastening device according to an embodiment of the present invention includes a cylindrical housing 10. The cylindrical housing 10 is integrally formed with a nozzle cover 10a disposed at the front and a fixed cover 10b disposed at the rear where air is introduced from the outside, and a handle 10c for configuring the air volume measurement device to be movable. ) Is formed integrally on the top.

The cylindrical housing 10 is made of synthetic resin, and may be manufactured using a 3D printer. That is, since the cylindrical housing 10 is configured such that the nozzle cover 10a, the fixed cover 10b, and the handle 10c are integrally formed, it is possible to easily manufacture the cylindrical housing 10 using a 3D printer. .

Here, the nozzle cover 10a has a configuration in which an outer surface is formed of a polygon, and the inflow cover 11 is assembled in the front and the nozzle panel 12 is assembled in the interior. In addition, the fixing cover 10b also has an outer surface formed of a polygon, and the finishing cover 13 is assembled at the rear.

The inlet cover 11 and the finishing cover 13 are also made of synthetic resin like the cylindrical housing 10, and thus, for example, it is possible to manufacture using a 3D printer.

The handle 10c formed integrally with the nozzle cover 10a and the fixed cover 10b is connected to a connector 10d at the rear, and a power cable 10e is connected to the connector 10d to configure a power supply unit do. In addition, the power unit is electrically connected to the PCB 10f installed inside the cylindrical housing 10.

The inlet cover 11 is configured to be formed through the inlet 11a in the axial direction so that air introduced from the outside flows into the nozzle panel 12 side, and a first rectifying plate 14 is installed therein. And the nozzle panel 12 is a multi-nozzle (Multi-Nozzle) consisting of two or more nozzles (Nozzle) is detachably inserted.

The first rectifying plate 14 is a type of perforated plate configured to calm the fluidity of air generated in the process of being sucked through the inlet 11a, reducing the pressure loss as well as the rotation of the air flow and the uniformity of the flow rate distribution In order to go from the center to the periphery, the gaps between the holes may be composed of asymmetric perforated plates, separated from each other by a pair, and disposed in front of the nozzle panel 12.

The multi-nozzle (12a) is composed of two or more nozzles distributed in the center and the outer periphery of the nozzle panel (12) to measure the amount of air passing through the first rectifying plate (14) and then to the rear circumferential surface of the cylindrical housing (10). It is discharged to the discharge portion (10g) to be formed. In addition, it is possible to measure the temperature, humidity and static pressure of the air.

Each nozzle is formed to pass through in the axial direction, so that the air flow measurement hole 12b for measuring the air flow rate is formed through the central portion. In addition, each nozzle may have a different cross-sectional area and may be radially arranged, for example, around the smallest nozzle disposed in the center of the nozzle panel 12.

For example, the multi-nozzle 12a is composed of first, second, third, fourth, and fifth nozzles in the drawing so as to have nozzles having different cross-sectional areas, and is detachably installed on the nozzle panel 12, so that it is introduced during airflow measurement. The required cross-sectional area according to the air volume is satisfied through the first, 2, 3, 4 and 5 nozzles and a combination thereof, so that various air volumes can be measured. That is, when the wind speed required for measuring the air volume is 3, the air volume may be measured by combining the first and second nozzles.

This makes it possible to more accurately measure the air volume by using a variety of nozzles in combination with the prior art method of measuring the air volume using one nozzle corresponding to the wind speed.

The nozzle panel 12 is provided with an insertion hole 12c corresponding to each nozzle formed through the axial direction so that the multi-nozzle 12a is detachable. The insertion hole 12c may be sealed to increase the bonding force with the multi-nozzle 12a.

The sealing treatment may also be performed between the nozzle cover 10a and the inlet cover 11, in which case the O-ring made of silicone or soft rubber material is provided with the nozzle cover 10a and the inlet cover ( 11) By intervening, it is possible to easily measure the air volume without losing pressure.

Here, the nozzle cover 10a and the nozzle panel 12 may further include a warning sensor that transmits a guide signal according to whether the multi-nozzle 12a is attached or detached to the nozzle panel 12.

That is, the warning signal according to the presence or absence of attachment or detachment of the multi-nozzle 12a may be transmitted to the control unit so that the user can easily check the presence or absence of the nozzle through the control unit to perform precise air flow measurement.

The multi-nozzle 12a is provided with a second rectifying plate 15 at the rear of the nozzle panel 12 which is detachably installed. In addition, the second rectifying plate 15 is provided with a damper 15a corresponding to each nozzle and a cylinder type opening/closing device 15b that forwards and reverses the damper 15a.

The damper 15a is disposed at the rear of each nozzle so that the multi-nozzle 12a can be selectively opened and closed according to the amount of air flowing through the inlet 11a, and according to the driving of the cylinder-type opening and closing device 15b. , While opening and closing the multi-nozzle (12a).

A blower 16 is disposed behind the second rectifying plate 15. The blower 16 is composed of a motor 16a and an impeller 16b axially connected to the motor 16a to rotate and electrically connected to a PCB 10f installed inside the cylindrical housing 10, thereby providing power. When the power is supplied through, it is driven to suck air and discharge it to the discharge section (10g).

In addition, the blower 16 may further include a heat sink 16c that dissipates heat generated when the motor 16a is driven. The heat sink 16c is made of, for example, an aluminum material to perform a function as a kind of heat sink, so that the heat of the PCB 10f configured to enable electronic control and the heat dissipation of the semiconductor device, which is a power module, are performed by the motor 16a. And a PCB 10f.

Here, the cylindrical housing 10 is an air guide portion 10g disposed between the impeller 16b and the second rectifying plate 15 so that the air passing through the second rectifying plate 15 is easily introduced into the impeller 16b. ) Is integrally formed therein.

That is, the air induction part 10g is a kind of partition wall, and is formed integrally with the cylindrical housing 10 so that a cylindrical housing 10 can be manufactured using a 3D printer. By inducing the air that has passed through (15) to the impeller (16b) side, it is possible to facilitate the intake of air through the blower (16).

Therefore, according to one embodiment of the present invention, the cylindrical housing 10 can be manufactured using a 3D printer, thereby reducing manufacturing cost, shortening the manufacturing period, and having a light weight through the handle 10c. Since it is easy to move, it is easy to operate the air volume measurement device to measure the air volume discharged from the air conditioning system of a car, the air conditioning system of a building, or the air conditioning system of home appliances, so it is effective in terms of usability.

On the other hand, the air flow measuring device having a flexible duct bandless fastening device according to an embodiment of the present invention flows external air into the inlet cover 11 and the cylindrical housing 10 installed in front of the cylindrical housing 10 It further includes a flexible duct 30 for connecting the integral adapter 20 to the pressure measuring unit and a bandless fastening device 50 for fastening the flexible duct 30 to the inlet cover 11 in a bandless manner.

The flexible duct 30 is composed of a corrugated pipe in which grooves and protrusions are repeated along the longitudinal direction around the circumference to facilitate length adjustment and direction change, and both ends are connected to the adapter body 21 and the inlet cover 11, respectively. The pressure measuring unit integrated adapter 20 can be easily moved to a measurement target, such as a ceiling of a building in which an air conditioning system is installed.

Here, the flexible duct 30 is generally connected to the inlet cover 11 and the adapter body 21 through a band or an adhesive tape.

The band-free fastening device 50 improves this conventional fastening structure, so that the flexible duct 30 is easily fastened to the inflow cover 11 without using a band or adhesive tape, and is connected.

That is, the bandless fastening device 50 includes first and second cylindrical bodies 51 and 52 that are screwed to the front of the inlet cover 11. In addition, the first fixing portion 53 protrudingly formed inside the first cylindrical body 51 and the second cylindrical body 52 facing the protrusion are formed to protrude from the first fixing portion 53. The second and third fixing parts 54 and 55 are included.

The first and second cylindrical bodies 51 and 52 have a structure in which a rear end screwed to the front of the inflow cover 11 is integrally formed, and the front ends are spaced from each other so that one end of the flexible duct 30 can enter. It is configured to.

Accordingly, when one end of the flexible duct 30 enters between the first and second cylindrical bodies 51 and 52, the first, second and third fixing parts 53 and 54 and 55 are connected to the flexible duct 30. It is inserted into the groove of the fastener.

That is, by utilizing the structural characteristics of the first, second, and third fixing parts 53, 54, 55 and the flexible duct 30, the flexible duct 30 can be easily fastened in a bandless manner for use. .

Here, the bandless fastening device 50 may be integrally formed with the adapter body 21 in place of the connecting portion (24 in FIG. 7) configured in the adapter body 21.

Therefore, according to one embodiment of the present invention, by connecting the both ends of the flexible duct 30 to the inlet cover 11 and the pressure measuring unit integral adapter 20 through the bandless fastening device 50, it is possible to connect, It is effective in terms of ease of use for measuring air volume.

FIG. 7 is a perspective view showing an air flow measuring device having a flexible duct bandless fastening device according to an embodiment of the present invention, wherein the bandless fastening provided on the inlet cover 11 installed in front of the cylindrical housing 10 is shown. The flexible duct 30 is connected through the device 50, and a coupling relationship in which the pressure measuring unit integrated adapter 20 is connected to the flexible duct 30 is shown.

8 is a perspective view showing a pressure measuring unit integral adapter 20 of the air flow measurement device having a flexible duct bandless fastening device according to an embodiment of the present invention, a pressure measuring hole for measuring the static pressure of external air A constant pressure tap 23 composed of 23a and an average pressure port 23b is integrally formed inside, and shows an integral adapter 20 of a pressure measuring unit provided with an integral handle 25 on the outside.

9 is a perspective view showing a cylindrical housing 10 of an air flow measurement device having a flexible duct bandless fastening device according to an embodiment of the present invention, a nozzle cover 10a, a fixed cover 10b, and a handle ( 10c) shows a configuration in which a pressure measuring pipe 17c is integrally formed in a cylindrical housing 10 integrally formed.

7 to 9, the air flow measurement device having a flexible duct bandless fastening device according to an embodiment of the present invention according to an embodiment of the present invention introduces external air into the cylindrical housing 10 side, and externally It may include a pressure measuring unit integral adapter 20 for measuring the static pressure of the air.

The pressure measuring unit integral adapter 20 is provided with an air inlet space 21a into which external air is introduced, and the pressure measuring unit integral adapter 20 is fixed and closely adhered to a measurement object to prevent leakage of external air. The pressure consisting of an adapter body provided with a fixed frame 22 in the form of a square frame (Adapter Body) and an inside of the adapter body (21) integrally measuring the pressure of external air. It includes a measuring unit.

The adapter body 21 is formed in a square shape through, for example, synthetic resin, and is connected to one end of the flexible duct 30 through a connecting portion 24 formed on the opposite side of the fixed flange 22. In addition, integral handles 25 are formed to protrude on both sides of the outside, so that the integral adapter 20 of the pressure measuring part can be easily gripped and moved to the measurement object.

The positive pressure tab 23 is integrally formed inside the adapter body 21 to measure the amount of air, the static pressure and the average pressure when external air flows into the air inlet space 21a of the adapter body 21. That is, the integral adapter 20 of the pressure measuring unit in which the positive pressure tab 23 is integrally formed can be manufactured using a 3D printer.

In addition, the positive pressure tab 23 is a pressure measuring hole (23a) formed in a circular shape so as to measure the pressure when the flowing outside air passes and the average pressure of the outside air flowing into the pressure measuring hole (23a) It consists of an average pressure port (23b) for measuring.

The average pressure port 23b measures the average pressure of the external air flowing into the air inlet space 21a and passing through the pressure measurement hole 23a, for example, a cylindrical housing through an air hose as a connecting means. It is connected to the sensor unit 17 installed in (10) to measure the average pressure of the outside air.

Here, the connecting means connecting the average pressure port (23b) and the sensor part (17) of the cylindrical housing (10) is fixed to the inside of the inlet (11a) of the inlet cover (11) to prevent flow. The ring portion (11b in FIG. 2) can be formed.

The cylindrical housing 10 passes through the pressure measuring hole 23a so that the measured value measured from the average pressure port 23b can be easily measured, for example, a sensor unit 17 including a discharge pressure sensor and a static pressure sensor. ) May be configured, and a manometer (not shown) that corrects an error in pressure generated when measuring static pressure may be configured.

In addition, the sensor unit 17 is a temperature and humidity sensor for measuring the temperature and humidity of the air, atmospheric pressure sensor for measuring atmospheric pressure, differential pressure sensor for measuring the differential pressure of the front and rear of the nozzle, measuring the amount of air and static pressure discharged through the blower The discharge may further include a static pressure sensor.

Here, the cylindrical housing 10 is integrally formed with a pressure measuring conduit 17c connecting the front sensor 17a provided at the front and the rear sensor 17b provided at the rear so as to be easily connected to the average pressure port 23b. It is formed and composed.

That is, a connection line is required to transmit the pressure measurement data measured through the front sensor 17a constituting the sensor unit 17 to the rear sensor 17b, wherein the pressure measurement pipeline 17c is the nozzle cover 10a. , By being integrally formed inside the wall surface over the cylindrical housing 10 and the fixed cover 10b, it is possible to easily configure it in the process of manufacturing the cylindrical housing 10.

Therefore, according to one embodiment of the present invention, the static pressure of air can be easily measured in the process of inhaling external air through the integrated adapter 20 of the pressure measuring unit connected through the cylindrical housing 10 and the flexible duct 30. By doing so, it is effective in terms of ease of use. In addition, since the pressure measuring pipe 17c is integrally formed in the cylindrical housing 10, it is possible to manufacture using a 3D printer, which is effective in terms of cost reduction and shortening of the manufacturing period.

The present invention has been described in detail by way of example, but this is for explaining the present invention in detail, and the air flow measurement device having the flexible duct bandless fastening device according to the present invention is not limited thereto. In addition, the terms "include", "compose", or "have" as described above mean that the corresponding component can be inherent unless specifically stated to the contrary, excluding other components However, it should be interpreted as being able to further include other components, and all terms, including technical or scientific terms, are generally understood by those skilled in the art to which the present invention pertains, unless otherwise defined. It has the same meaning as being.

In addition, the above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains can make various modifications and modifications without departing from the essential characteristics of the present invention. Therefore, the exemplary embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain the scope of the technical spirit of the present invention. The scope of protection of the present invention should be interpreted by the claims below, and all technical spirits within the equivalent range should be interpreted as being included in the scope of the present invention.

10: cylindrical housing 10a: nozzle cover
10b: Fixed cover 10c: Handle
10d: connector 10e: power cable
10f: PCB 10g: outlet
10h: Air induction part 11: Inlet cover
11a: Inlet 12: Nozzle panel
12a: Multi-nozzle 12b: Air flow measurement hole
12c: Insertion hole 13: Finish cover
14: first rectifying plate 15: second rectifying plate
15a: Damper 15b: Cylinder type switchgear
16: Blower 16a: Motor
16b: impeller 17: sensor unit
17a: Front sensor 17b: Rear sensor
17c: Pressure measuring conduit 20: Pressure measuring unit integrated adapter
21: Adapter body 22: Fixed flange
23: Positive pressure tap 23a: Pressure measuring hole
23b: average pressure port 24: connection
25: handle 30: flexible duct
50: bandless fastening device 51: first cylindrical body
52: second cylindrical body 53: first fixing portion
54: second fixing portion 55: third fixing portion

Claims (5)

A cylindrical housing in which a nozzle cover is integrally formed in front of which air flows from the outside, a fixed cover in which a finishing cover is installed in the rear, and a handle is integrally formed in the upper portion;
An inlet cover installed in the front of the nozzle cover, formed through the axial direction to introduce air introduced from the outside into the cylindrical housing, and having a first rectifying plate installed therein;
A nozzle panel installed inside the nozzle cover and configured to detachably install a multi-nozzle composed of nozzles having different cross-sectional areas for measuring the amount of air passing through the first rectifying plate;
A second rectifying plate disposed at the rear of the nozzle panel and having a cylinder type opening and closing device for moving the damper forward and backward so as to open and close each nozzle through a damper;
A blower which is disposed at the rear of the second rectifying plate and is composed of a motor and an impeller that is connected to the motor and rotates to suck air passing through the second rectifying plate and discharge it to a discharge portion formed on a rear outer circumferential surface of the cylindrical housing;
A pressure measuring unit-integrated adapter connected to the inlet cover through a flexible duct to introduce external air into the cylindrical housing and measure the static pressure of the external air; And
A bandless fastening device installed on the inflow cover to fasten the flexible duct in a bandless manner;
It includes,
The pressure measuring unit integral adapter is provided with an air inlet space inside, and a square frame-shaped fixing flange that prevents leakage of external air by fixing and closely fitting the pressure measuring unit integral adapter to the measurement object to the outside. Provided adapter body; And
It is formed in a circular shape on the inside of the adapter body and is composed of a pressure measuring hole for measuring the pressure when external air passes and an average pressure port for measuring the average pressure of the air entering the pressure measuring hole. Pressure measuring unit consisting of a positive pressure tab formed integrally with;
Including,
The band-free fastening device comprises: a first and second cylindrical body formed integrally with a rear end screwed to the front of the inflow cover and spaced apart from one end of a flexible duct composed of a corrugated pipe;
A first fixing part protruding inside the first cylindrical body; And
Second and third fixing portions protruding from the outside of the second cylindrical body facing the first fixing portion and disposed to be staggered with the first fixing portion;
Air flow measuring device having a flexible duct band-free fastening device comprising a.
delete The method according to claim 1,
An air flow measurement device having a flexible duct bandless fastening device integrally formed with a bandless fastening device on the adapter body.
The method according to claim 1,
A ring portion protruding in an annular shape inside the inlet of the inlet cover so as to prevent flow by fixing the connecting means connecting the average pressure port and the sensor portion installed in the cylindrical housing;
Air flow measurement device having a flexible duct band-free fastening device further comprising a.
The method according to claim 4,
The cylindrical housing is provided with a flexible duct bandless fastening device formed integrally with a pressure measuring pipe connecting the front sensor provided at the front of the cylindrical housing and the rear sensor provided at the rear of the cylindrical housing to configure the sensor unit. Air volume measuring device

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