TWI696808B - Measurement device - Google Patents

Abstract

A measurement device for measuring an airflow volume and a ventilation resistance of a wind-blowing apparatus includes: a housing that includes an air duct with an air inlet and an air outlet, the air inlet being configured to take in air, the air outlet being configured to send out the taken air; an opening member installed inside the air duct, the opening member including an opening allowing the air taken from the air inlet to pass therethrough; pressure sensors configured to measure air pressures before and after the air passes through the opening member in the air duct; and an opening member replacing mechanism that forms a part of the air duct, the opening member replacing mechanism being configured to allow the opening member to be replaceable.

Description

Measuring device

The invention relates to a measuring device for measuring air volume and ventilation impedance.

In the past, measuring devices for measuring air volume are well known. For example, in the technology described in Japanese Patent Laid-Open No. 2004-309202, the temperature-sensing element (thermal sensor) is cooled by blowing air. In this way, the air volume is measured based on the temperature difference between the temperature sensing elements before and after the air supply. This technique is widely known.

In addition, techniques for measuring the air volume using pressure sensors are also well known. For example, in the technique described in Japanese Patent Laid-Open No. 2005-207832, a nozzle for generating a differential pressure of air is provided between the first chamber and the second chamber. The air volume is measured based on the differential pressure of air between the first chamber and the second chamber and the opening area of the nozzle.

As described in Japanese Patent Laid-Open No. 2004-309202, the technique of measuring the air volume using a temperature sensor (thermal sensor) can reduce the size of the measurement device, but it can only measure the air volume, and cannot measure the air volume. The ventilation resistance.

In addition, as described in Japanese Patent Laid-Open No. 2005-207832, the technique of measuring the air volume using a pressure sensor can measure the air volume and the ventilation impedance. In this technique, the air volume can be measured if it corresponds to a range of a predetermined chamber size and nozzle opening area. However, with this technology, it is not easy to measure the various ranges of wind flow devices (hereinafter referred to as wind flow devices) such as servers, power supply devices, measuring devices, ventilation fans, air curtains, exhaust pipes, compressors, fans, etc. of information base stations Air volume and ventilation resistance. Therefore, this technology lacks versatility.

In the technique described in Japanese Patent Laid-Open No. 2005-207832, for example, in order to measure a large air volume, a nozzle with a large opening area must be used. In addition, in order to measure a small air volume, a nozzle with a small opening area must be used. That is, if a nozzle with a small opening area is used in order to measure a large air volume, for example, a vortex of the airflow returned from the nozzle will be generated, so the optimal pressure difference cannot be obtained. In addition, if a nozzle with a large opening area is used in order to measure a small air volume, the pressure difference between the chambers becomes extremely small. Therefore, the accuracy of the measurement of air volume and ventilation impedance is significantly reduced.

Moreover, the relationship between the size of the chamber and the position of the opening provided in the nozzle also affects the range of the measurable air volume. Therefore, the technique described in Japanese Patent Laid-Open No. 2005-207832 can only measure the air volume and the ventilation resistance corresponding to the predetermined size of the chamber and the position of the opening provided in the nozzle.

An object of the present invention is to provide a measuring device capable of responding to various ranges of air volume and having high versatility for a measuring device for measuring air volume and ventilation impedance.

The measuring device of the first aspect of the present invention for measuring the air volume and the ventilation impedance of the airflow device is provided with: a frame body having a ventilation path, the ventilation path having an inlet for taking in air, and a The delivery outlet for the taken-in air; the opening member, which is provided in the aforementioned ventilation channel, and has an opening through which the air taken in from the aforementioned inlet can pass; a pressure sensor, which is used to measure The pressure of the air before and after passing through the opening member in the air duct; and an opening member replacement mechanism formed as part of the air duct and replacing the opening member.

A measurement device according to a second aspect of the present invention is the measurement device according to the first aspect, wherein the opening member replacement mechanism includes: a specific opening provided in a part of the air passage; and a switch for opening and closing the specific opening The opening and closing member.

The measuring device according to the third aspect of the present invention is the measuring device according to the first or second aspect, wherein it further includes a control unit connected to the pressure sensor, before and after passing through the opening member The measured value of the pressure of the air calculates the air volume and ventilation impedance of the wind flow device, and displays the calculated air volume and ventilation impedance on the display unit.

The measuring device according to the fourth aspect of the present invention is the measuring device according to the third aspect, further comprising a rectifying grid for rectifying the air taken in from the intake port, and the pressure sensor measures the The first pressure of the air pressure from the inlet to the rectifying grid, the second pressure of the air from the rectifying grid to the opening member, and the third pressure of the air pressure after passing through the opening member, The control unit calculates the air volume based on the differential pressure between the second pressure and the third pressure, and calculates the ventilation impedance based on the calculated air volume and the value of the first pressure.

The measuring device of the fifth aspect of the present invention is the measuring device of any one of the first to fourth aspects, further comprising: provided at the outlet port for sending out the air of the ventilation duct to the outside Auxiliary fan.

The measuring device according to the sixth aspect of the present invention is the measuring device according to any one of the first to fifth aspects, wherein the opening member is provided in the vent so as to be movable in the longitudinal direction of the vent Inside.

The measuring device of the seventh aspect of the present invention is the measuring device of any one of the first to sixth aspects, wherein the opening of the opening member has a gradually narrowed funnel-like shape and is formed in The center of the aforementioned opening member.

The measuring device of the eighth aspect of the present invention is the measuring device of the third or fourth aspect, wherein the opening member is provided with identification information according to its type, and the control unit is provided in the ventilation duct. The identification information of the opening member is displayed on the display section.

The measuring device of the ninth aspect of the present invention is the measurement of the first aspect The device, wherein the ventilation duct is provided with a rectifying grid for rectifying the air taken in from the intake port, a first chamber for taking in the air that has passed through the rectifying grid, and for taking in the opening member In the second chamber of the opening, the opening of the opening member allows air taken in by the first chamber to pass, and the pressure sensor measures the pressure of the air from the inlet to the rectifying grid The first pressure; the second pressure of the air pressure in the first chamber; and the third pressure of the air pressure in the second chamber.

In the measurement devices of the first to ninth aspects, various types of opening members can be provided using the opening member replacement mechanism. Therefore, these measurement devices are highly versatile.

In the measuring device of the ninth aspect, when the size of the chamber is used as a reference, the opening area and opening position of the opening member can be determined according to the size of the chamber. Therefore, it is possible to prevent the size of the chamber from becoming larger than necessary. That is, the measurement device can be miniaturized.

The measurement device of the tenth aspect of the present invention is the measurement device of the ninth aspect, wherein the frame is made of resin material, The frame body is provided with: a control board connected to the pressure sensor to calculate the air volume and the ventilation resistance; and a display section displaying the air volume and the ventilation resistance calculated by the control board.

This makes it possible to reduce the weight of the housing. Since the control board and the display unit are mounted on the housing, the functions of measurement, calculation, and display can be integrated into one component. Therefore, it is easy to carry a light-weight measuring device, and it is possible to measure the air volume and ventilation resistance of the airflow device located in various places.

The measurement device of the eleventh aspect of the present invention is the measurement device of the tenth aspect, wherein the control substrate calculates the air volume based on the differential pressure between the second pressure and the third pressure, and then based on the calculated air volume and The aforementioned first pressure calculates the ventilation resistance.

The measurement device of the twelfth aspect of the present invention is the measurement device of any one of the aspects of the ninth to eleventh aspects, and further includes: provided at the outlet port for sending out the air of the ventilation duct to the outside Auxiliary fan.

By this auxiliary fan, it is possible to suppress the occurrence of a decrease in the air volume of the air sent from the air flow device of the measurement object due to an unexpected load caused by the shape of the air duct itself. As a result, an appropriate air volume suitable for measurement can be maintained. Therefore, the air volume and ventilation impedance can be measured more accurately.

The measuring devices for measuring air volume and ventilation impedance according to various aspects of the present invention can respond to various ranges of air volume and have a high degree of versatility.

1‧‧‧Detection device

2‧‧‧Access

3‧‧‧Export

4‧‧‧Ventilation duct

5a‧‧‧The first pressure sensor

5b‧‧‧The second pressure sensor

6‧‧‧Relay board

7a‧‧‧First valve

7b‧‧‧ 2nd valve

8‧‧‧Distributor

9a~9f‧‧‧tube

10‧‧‧Housing

10a‧‧‧First opening

10b‧‧‧The second opening

10c‧‧‧The third opening

10d‧‧‧Flange

10e‧‧‧handle

10f‧‧‧Specific opening

10g‧‧‧Establish a holding part

11a‧‧‧The first external port

11b‧‧‧The second vent

12‧‧‧Protection cover

13‧‧‧Opening and Closing Department

14‧‧‧Rectifying grid

15‧‧‧ Room 1

16‧‧‧Opening plate

17‧‧‧ Room 2

18‧‧‧Auxiliary fan

20‧‧‧Control device

21‧‧‧Power Department

22‧‧‧Control board

23‧‧‧ Display

FIG. 1 shows an example of a perspective view of the measuring device according to the embodiment of the present invention viewed from the first direction.

FIG. 2 shows an example of a perspective view of the measurement device viewed from the second direction.

FIG. 3 shows an example of a cross-sectional explanatory view of the aforementioned measuring device.

4A and 4B are examples of perspective views showing the opening plate of the measurement device.

FIG. 5 shows an example of the display content displayed on the display unit of the measurement device.

FIG. 6 shows an example of how to use the aforementioned measuring device.

In order to explain the present invention, in the following detailed description, various specific contents are proposed for a thorough understanding of the disclosed embodiments. However, it is clear that more than one embodiment can be implemented without such specific content. In other cases, well-known structures and devices are shown in schematic diagrams to simplify the illustration.

Hereinafter, embodiments of the present invention will be described. FIG. 1 shows an example of a perspective view of the measuring device 1 of the present embodiment viewed from the first direction. FIG. 2 shows an example of a perspective view of the measuring device 1 viewed from a second direction different from the first direction.

The measuring device 1 is used to measure the air volume and ventilation impedance of the airflow device. As shown in FIGS. 1 and 2, the measurement device 1 includes a casing (frame) 10. The housing 10 has a vent 4. The air duct 4 is in communication with the inlet 2 and the outlet 3. The intake port 2 takes in air (for example, air from an airflow device) sent from the outside into the ventilation duct 4. The air outlet 3 sends out the air that has been taken in to the outside of the air duct 4.

On the upper surface of the housing 10, a control device 20 is installed. The control device 20 performs control for measuring air volume and ventilation impedance.

As shown in FIG. 1, on the surface of the housing 10 in the first direction, that is, on the first side surface, the relay substrate 6, the first valve 7 a and the second valve are installed 7b. Distributor 8. Multiple tubes 9a~9f. The relay substrate 6 is equipped with a first pressure sensor 5a and a second pressure sensor 5b for measuring the pressure of air. The first valve 7a and the second valve 7b are used to adjust the delivery of air to the first pressure sensor 5a. The distributor 8 distributes air into two flow paths.

The first pressure sensor 5a and the second pressure sensor 5b mounted on the relay substrate 6 are sensors for measuring the pressure of air. The first pressure sensor 5a and the second pressure sensor 5b are differential pressure sensors having two input ports. Specifically, the first pressure sensor 5a and the second pressure sensor 5b include one (upper) input port which is a positive input port and the other (lower) input port which is a negative input port. Furthermore, in the present embodiment, the first pressure sensor 5a and the second pressure sensor 5b are mounted on the relay substrate 6. This structure may be replaced, that is, the measurement device 1 may not include the relay substrate 6. In this case, the first pressure sensor 5a and the second pressure sensor 5b may be directly attached to the housing 10 (the first side surface of the housing 10).

Here, in order to measure the pressure of the air in the air duct 4 on the first side surface of the housing 10, three holes, that is, a first opening 10a, a second opening 10b, and a third opening 10c are formed (see FIG. 1, image 3).

In addition, one end of the first tube 9a is connected to the first opening 10a. At the other end of the first tube 9a, a distributor 8 is connected.

The distributor 8 is connected to the first tube 9a, the second tube 9b, and the first valve 7a. The distributor 8 distributes the air input through the first tube 9a to the second tube 9b and the first valve 7a.

The first valve 7a has three ports. The distributor 8 and the third tube 9c are connected to the two ports of the first valve 7a, respectively. The remaining one port of the first valve 7a is the first external air port 11a for taking in external air. In addition, in the first valve 7a, the air sent by the third pipe 9c is switched by rotating the cross-shaped adjusting portion (adjusting the first valve 7a). That is, the first valve 7a switches the air sent by the third pipe 9c between the air from the first opening 10a input through the distributor 8 and the external air input through the first external air port 11a (Adjustment).

For example, the arrow of the adjustment portion of the first valve 7a shown in FIG. 1 is oriented toward the relay substrate 6 side or the upper side. At this time, the first valve 7a sends out the outside air input through the first outside air port 11a to the third pipe 9c. In addition, the arrow of the adjustment portion of the first valve 7a is directed toward the distributor 8 side or the lower side. At this time, the first valve 7a sends out the air from the first opening 10a input through the distributor 8 to the third pipe 9c.

The third pipe 9c connected to the first valve 7a is a negative input port connected to the first pressure sensor 5a. Therefore, one of the air from the first opening 10a or the outside air input through the first outside air port 11a is input to the negative input port of the first pressure sensor 5a.

The second valve 7b also has three ports in the same manner as the first valve 7a. A second pipe 9b and a fourth pipe 9d are connected to the two ports of the second valve 7b, respectively. The remaining one port of the second valve 7b is the second external air port 11b for taking in external air. In addition, in the second valve 7b, the air sent out by the fourth pipe 9d is switched by rotating the cross-shaped adjusting portion (adjusting the second valve 7b). That is, the second valve 7b passes the air sent by the fourth pipe 9d through The air from the first opening 10a input to the second tube 9b is switched (adjusted) between the external air input through the second external air port 11b.

For example, the arrow of the adjustment portion of the second valve 7b shown in FIG. 1 is directed toward the distributor 8 side or the lower side. At this time, the second valve 7b sends out the air from the first opening 10a that is input through the second tube 9b to the fourth tube 9d. In addition, the arrow of the adjustment portion of the second valve 7b is directed toward the relay substrate 6 or the upper side. At this time, the second valve 7b sends the outside air input through the second outside air port 11b to the fourth pipe 9d.

The fourth pipe 9d connected to the second valve 7b is a positive input port connected to the first pressure sensor 5a. Therefore, one of the air from the first opening 10a or the external air input through the second external air port 11b is input to the positive input port of the first pressure sensor 5a.

Therefore, by adjusting the first valve 7a and the second valve 7b, the following modes (1) or (2) can be selected.

(1) Input air from the first opening 10a to the positive input port of the first pressure sensor 5a, and input external air to the negative input port of the first pressure sensor 5a; (2) A mode in which the outside air is input to the positive input port of the first pressure sensor 5a, and the air from the first opening 10a is input to the negative input port of the first pressure sensor 5a.

Furthermore, by adjusting the first valve 7a and the second valve 7b, the same air (pressure of air) can be input to the positive input port and the negative input port of the first pressure sensor 5a. In such a case, the determination result by the control device 20 is an error.

In this way, the measuring device 1 includes the first valve 7a and the second valve 7b. Thereby, the air input to the positive input port and the negative input port of the first pressure sensor 5a can be selected as one of the air from the first opening 10a or the outside air. As a result, when measuring the air volume and the ventilation resistance of the airflow device (when receiving air from the airflow device to be measured), the pressure of the air from the first opening 10a becomes a value lower than the pressure (atmospheric pressure) of the outside air With this, it is possible to suppress the static pressure of the air passing through the first opening 10a from becoming negative. That is, the measured value of the first pressure sensor 5a of the differential pressure sensor can be made a positive value.

In addition, one end of the fifth tube 9e is connected to the second opening 10b. A positive input port of the second pressure sensor 5b is connected to the other end of the fifth tube 9e. In addition, one end of the sixth tube 9f is connected to the third opening 10c. A negative input port of the second pressure sensor 5b is connected to the other end of the sixth tube 9f.

Therefore, air from the second opening 10b is input to the positive input port of the second pressure sensor 5b. Air from the third opening 10c is input to the negative input port of the second pressure sensor 5b.

In order to externally protect the relay substrate 6, the distributor 8 and the plurality of tubes 9a to 9f equipped with the first pressure sensor 5a and the second pressure sensor 5b, a protective cover 12 is installed on the first side of the housing 10 . Furthermore, in the example shown in FIG. 1, in order to display the relay substrate 6 and the like, the protective cover 12 is removed.

The protective cover 12 is formed with a first adjustment opening 12a and The second adjustment opening 12b. The first adjustment opening 12a and the second adjustment opening 12b have larger openings than the cross-shaped adjustment portions of the first valve 7a and the second valve 7b, so that when the protective cover 12 is attached to the housing 10, The first valve 7a and the second valve 7b are adjusted. In addition, the first adjustment opening 12a is formed in a portion (surface) of the protective cover 12 attached to the housing 10 facing the adjustment portion of the first valve 7a. The second adjustment opening 12b is formed in a portion (surface) of the protective cover 12 attached to the housing 10 that faces the adjustment portion of the second valve 7b.

In addition, a flange 10d is formed on the outer peripheral surface of the case 10 on the inlet 2 side. The flange 10d is used to lock the connection duct 30 described later (see FIG. 6 ). A handle 10e is formed on the upper surface of the housing 10 in order to easily carry the measuring device 1.

Especially in this embodiment, the housing 10 can be made of nylon, polyoxymethylene, fluororesin, ABS resin, polyethylene, polypropylene, polycarbonate, vinyl chloride resin, phenol resin, methacrylate resin, melamine resin, urea-formaldehyde resin, poly Resin materials such as urethane are formed (formed). This makes it possible to reduce the weight of the measurement device 1 (case 10). In addition, the housing 10 may be heated by the air cooling from the airflow device of the measurement object and the warm air (hot air) from the airflow device of the measurement object. Therefore, in order to suppress cooling or heating of the handle 10e and the control device 20, it is desirable that the housing 10 is made of a resin material having low thermal conductivity.

In this way, by constituting the casing 10 with a resin material, it is possible to reduce the weight of the measurement device 1 (the casing 10). In addition, a handle 10e is formed on the upper surface of the housing 10. Therefore, the measurement device 1 can be easily transported.

As shown in FIG. 2, a specific opening 10 f is formed on the second side surface of the casing 10 in the second direction. The specific opening 10f is provided to replace the opening plate 16 (see FIGS. 3, 4A, and 4B) described later. The specific opening portion 10f is provided at a portion (opposite surface) of the second side surface (side surface of the air duct 4) in the housing 10 facing the side surface of the opening plate 16. That is, the specific opening 10f is provided in a part of the air duct 4.

The specific opening portion 10f is opened to have a size that allows the opening plate 16 to be inserted into and taken out of the air duct 4. That is, the specific opening portion 10f has the size of the exchangeable opening plate 16. The specific opening 10f is provided with an opening/closing portion 13 that can slide in a direction perpendicular or slightly perpendicular to the longitudinal direction of the air duct 4.

The opening and closing portion 13 is an opening and closing member for opening and closing the specific opening 10f. The opening and closing portion 13 includes a base 13a and a side plate 13b for closing the specific opening 10f (closing the opening).

The opening/closing part 13 is provided with a guide rail 13c on the back of the base 13a. The guide rail 13c is movably engaged with a slider (not shown) provided inside the air duct 4. With this, the opening and closing portion 13 is configured to be slidable.

In addition, the side plate 13b is provided with a side plate handle portion 13d for grasping the opening and closing portion 13, a restricting portion 13e, and an opening and closing locking portion 13g. The restricting portion 13e allows the opening plate 16 to be erected on the air passage 4 when the specific opening portion 10f has been closed, and restricts the opening plate 16 from moving in the longitudinal direction of the air passage 4. The opening and closing locking portion 13g is configured to be able to be locked with the body locking portion 13f attached to the housing 10. When the opening and closing locking portion 13g is locked to the body locking portion 13f, the specific opening portion by the opening and closing portion 13 (side plate 13b) is maintained 10f sealing state.

Thereby, the specific opening 10f can be opened or closed by grasping the side panel handle 13d and sliding the opening and closing portion 13. Moreover, by opening the specific opening 10f, the opening plate 16 can be replaced with one corresponding to the air volume of the airflow device to be measured. Therefore, the measurement device 1 can respond to various ranges of air volume (having a high degree of versatility).

Furthermore, in the present embodiment, the opening and closing portion 13 is configured to be slidable. Instead of this structure, the opening and closing portion 13 (side plate 13b) is configured such that one end side is pivotally supported by the housing 10, and the other end side can be opened. In this case, the opening and closing portion 13 (side plate 13b) is configured to be opened and closed like a door.

The specific opening portion 10f and the opening and closing portion (opening and closing member) 13 are included in a part of the ventilation path 4 of the measuring device 1, and the opening plate 16 is used as an opening member replacement mechanism for replacement.

FIG. 3 shows an example of a cross-sectional explanatory diagram of the measuring device 1. In the measurement device 1 shown in this figure, the relay substrate 6, the first valve 7a, the second valve 7b, the distributor 8, a plurality of tubes 9a to 9f, and the protective cover 12 are removed. And a part of the housing 10 is also removed.

As shown in FIG. 3, the ventilation duct 4 includes a rectifying grid 14, a first chamber 15, an opening plate 16, a second chamber 17, and an auxiliary fan 18. The rectifying grid 14 is used to rectify the air taken in from the intake port 2. In the first chamber 15, air passing through the rectifying grid 14 is taken in. The opening plate (opening member) 16 has an opening through which air taken in the first chamber 15 can pass. That is, the opening plate 16 is provided in the ventilation duct and has an opening through which air taken in from the inlet 2 can pass. In Room 2 17, Air passing through the opening of the opening plate 16 is taken in. The auxiliary fan 18 is used to send the air in the air duct 4 (air in the second chamber 17) to the outside.

In addition, inside the housing 10, there is formed a standing holding portion 10g for holding the opening plate 16 in a state of standing on the ventilation duct 4.

The rectifying grid 14 is configured to have a rectangular grid shape. The rectifying grid 14 is used to rectify the air sent from the airflow device to be measured.

The first chamber 15 is a space formed from the flow straightening grid 14 to the opening plate 16. The second chamber 17 is a space formed from the opening plate 16 to the auxiliary fan 18.

The first opening 10a is formed between the inlet 2 and the flow straightening grid 14. The first opening 10a is provided to measure the pressure of the air before passing through the rectifying grid 14. In addition, the second opening 10b is formed in the first chamber 15. The second opening 10b is provided to measure the pressure of the air in the first chamber 15 (the air before passing through the opening plate 16). In addition, the third opening 10c is formed in the second chamber 17. The third opening 10c is provided to measure the pressure of the air in the second chamber 17 (air after passing through the opening plate 16).

The auxiliary fan 18 is provided on the delivery port 3 side. The auxiliary fan 18 sends air from the air flow device to be measured and located in the air duct 4 to be externally assisted. The auxiliary fan 18 is a metal fan in order to be able to cope with the large amount of air sent from the airflow device to be measured. In addition, in order to achieve weight reduction, the auxiliary fan 18 may be a fan made of resin.

By the auxiliary fan 18, it is possible to suppress the load (pressure loss) caused by the shape of the air passage 4 and the air The unexpected load caused by the length in the longitudinal direction, etc. may cause a decrease in the air volume of the air sent from the airflow device to be measured. As a result, an appropriate air volume suitable for measurement can be maintained. That is, by providing the auxiliary fan 18, the measurement device 1 can be used as an axial blower corresponding to the airflow device of the measurement object, even if the ventilation path 4 of the measurement device 1 is similar to the ventilation path of the airflow device of the measurement object.

The opening plate 16 intentionally generates a pressure difference between the pressure of the air in the first chamber 15 and the pressure gauge in the second chamber 17. As shown in FIG. 4A, a differential pressure opening 16a is formed in the center or slightly center of the opening plate 16, and the opening has a shape narrowed into a funnel shape. The opening plate 16 is given an identification number (identification information) corresponding to its type.

In addition, in the present embodiment, the differential pressure opening 16a has a shape narrowed into a funnel shape. Instead of this shape, as shown in FIG. 4B, the shape of the opening plate 16 may be a flat plate shape. In this case, a cylindrical differential pressure opening 16b may be formed in the slightly center of the opening plate 16.

Furthermore, the formation position of the differential pressure opening 16a or 16b may be shifted. For example, the differential pressure opening 16a or 16b may be arranged close to one end side of the opening plate 16. As the shape and position of the opening portion 16a or 16b for the differential pressure of the opening plate 16, it is appropriate to use The most ideal shape and position of the range of air volume, the size and shape of the first chamber 15 and the second chamber 17 and so on.

Accordingly, when the sizes of the first chamber 15 and the second chamber 17 are used as a reference, the shape and position of the differential pressure opening 16a or 16b of the opening plate 16 can be determined according to the sizes of these chambers. Therefore, it can be suppressed that the size of the first chamber 15 and the second chamber 17 becomes larger than necessary. That is, the first chamber 15 and the second chamber 17 can be made compact. As a result, the measurement device (measurement device 1) can be reduced in size.

Furthermore, in the present embodiment, the opening of the differential pressure opening 16a has a shape narrowed into a funnel shape. In addition, the opening portion 16 a for differential pressure is formed at the approximate center of the opening plate 16. With this, even when the opening plate 16 is used as a reference, the first chamber 15 and the second chamber 17 can be suppressed to the minimum necessary size to be able to stably measure the air pressure of each chamber. As a result, the first chamber 15 and the second chamber 17 can be made compact.

Returning to FIG. 3 again for description, the aforementioned control device 20 includes: a power supply unit 21 in which power is stored in advance; a control board 22; and a display unit 23. The control board 22 is used to calculate the air volume and ventilation impedance. Moreover, the control board 22 is used to control the driving of the auxiliary fan 18. The display unit 23 is used to display the measured air volume and ventilation impedance. The first pressure sensor 5a, the second pressure sensor 5b, and the auxiliary fan 18 are connected to the control board 22, and the power supply unit 21 and the display unit 23 are connected.

The power supply unit 21 stores power from external power supply voltage. With this power supply unit 21, even when the measurement device 1 is transported (when the measurement device 1 is disconnected from the external power supply), control by the control board 22 can also be performed. In addition, the power supply unit 21 may be provided with a power plug instead of having a power supply voltage that stores electricity from the outside. In this case, the power supply unit 21 may be configured to supply power supplied from the outside via the power plug to the control device 20 or the like.

The control board 22 is equipped with various operation buttons 24, and can be used for various operations by the measurer. The various operation buttons 24 include, for example, a power button for turning on the power of the measurement device 1, a measurement start button for starting measurement, and an identification for setting (or reading) the opening plate 16 to be installed Number setting button.

In addition, the control board 22 is configured to calculate the air volume and the ventilation impedance according to the measured values measured by the first pressure sensor 5a and the second pressure sensor 5b, and drive the auxiliary fan 18.

FIG. 5 shows an example of the display content displayed on the display unit 23 of the measurement device 1.

As shown in FIG. 5, the display unit 23 is configured to display the values of air volume (AIR FLOW) and ventilation resistance (STATIC PRESSURE), and at least display the identification number (identification information) of the opening plate 16 (nozzle; NOZZLE). That is, the control board 22 causes the display unit 23 to display the identification number of the opening plate 16 provided in the ventilation duct 4.

Hereinafter, the outline of the control until the air volume and the ventilation resistance are displayed on the display unit 23 will be described.

First, the second pressure sensor 5b measures the pressure of the air before and after the ventilation duct 4 passes through the opening plate 16. That is, the second pressure sensor 5b is used to measure the air pressure (second pressure) of the first chamber 15 obtained through the second opening 10b and through the third opening 10c The obtained differential pressure of the air pressure (third pressure) of the second chamber 17. The second pressure sensor 5b outputs the measured differential pressure to the control board 22 as the second differential pressure value. In addition, the second pressure is the pressure of the air from the pressure gauge straightening grid 14 to the opening plate 16. The third pressure is the pressure of the air after passing through the opening plate 16.

The control board 22 calculates the air volume of the air sent from the air flow device to be measured based on the second differential pressure value input from the second pressure sensor 5b, the opening area of the opening plate 16, and the like.

In addition, the first pressure sensor 5a measures the pressure of the air (first pressure) obtained through the first opening 10a before passing through the rectifying grid 14 and the outside air obtained through the first external air port 11a or the second external air port 11b The differential pressure (static pressure) of the atmospheric pressure. The first pressure sensor 5a outputs the measured differential pressure to the control board 22 as a first differential pressure value (static pressure value). In addition, the first pressure is the pressure of the air from the inlet 2 to the rectifying grid 14.

The control board 22 calculates the ventilation resistance of the air sent from the airflow device to be measured based on the first differential pressure value input from the first pressure sensor 5a and the calculated air volume value. That is, the control board 22 calculates the air volume based on the difference between the second pressure and the third pressure, and calculates the ventilation resistance based on the calculated air volume and the value of the first pressure.

Next, in order to display the calculated air volume and ventilation impedance on the display unit 23, the control board 22 outputs a display signal corresponding to the calculated air volume and ventilation impedance to the display unit 23.

With this, as shown in FIG. 5, display and automatic control are performed on the display unit 23 The value of the air volume and ventilation impedance corresponding to the display signal input by the control board 22.

FIG. 6 shows an example of how to use the measuring device 1 when measuring the air volume and the ventilation resistance of the airflow device 50 to be measured.

As shown in FIG. 2, the measurer slides the opening and closing portion 13 by opening the locking of the body locking portion 13 f and the opening and closing locking portion 13 g of the measuring device 1, so that the side surface of the ventilation duct 4 is formed as an opening. The measurer erected the opening plate 16 according to the air volume of the airflow device 50 of the measurement object to the ventilation duct 4 upright. Then, the measurer slides the opening and closing portion 13 to block the side surface of the air duct 4 and locks the body locking portion 13f and the opening and closing locking portion 13g.

Next, as shown in FIG. 6, the surveyor attaches the connecting duct 30 to the air outlet 51 of the airflow device 50 to be measured and the flange 10 d of the measurement device 1.

Then, the measurer operates the power button of the control device 20 to input the power of the measurement device 1. Further, the measurer operates the measurement start button to start the measurement. Then, when the calculation of the air volume and the ventilation impedance by the control board 22 is completed, the values of the air volume and the ventilation impedance are displayed on the display unit 23.

As described above, according to the measurement device 1 of the present embodiment, by sliding the opening and closing section 13 to form the side surface of the air duct 4 as an opening, various opening plates 16 corresponding to the air volume of the airflow device to be measured can be provided . That is, in the measurement device 1, the opening plate 16 provided in the ventilation duct 4 can be replaced. Therefore, the measurement device 1 can respond to various ranges of air volume (having a high degree of versatility).

In addition, in the present embodiment, the measuring device 1 is provided with two differential pressure sensors of the first pressure sensor 5a and the second pressure sensor 5b. However, instead of these sensors, the measuring device 1 includes the following four pressure sensors. That is, the measuring device 1 may include: a pressure sensor for measuring atmospheric pressure; a pressure sensor for measuring the static pressure of the first opening 10a; and a pressure sensor for measuring the static pressure of the second opening 10b ; And a pressure sensor for measuring the static pressure of the third opening 10c.

In addition, the measurement device 1 of the present embodiment includes a control device 20 attached to the housing 10. This structure may be replaced, that is, the measurement device 1 may not include the control device 20. For example, instead of the control device 20, the measurement device 1 includes a control device (external control device) such as a computer as an external device (for example, a device separated from the casing). In this case, for example, the measurement values measured by the first pressure sensor 5a and the second pressure sensor 5b may be input to an external control device. In addition, the values of air volume and ventilation impedance may be calculated for an external control device, and the equivalent values may be displayed on the display unit 23 (or other display).

Furthermore, in the present embodiment, the control device 20 of the measurement device 1 includes a display unit 23 for displaying the air volume, ventilation impedance, and the like. However, the control device 20 of the measurement device 1 may not include the display unit 23. For example, the control device 20 may be configured to be connected to an external display such as a liquid crystal display. In this case, the control device 20 causes the external display to display the values of air volume and ventilation impedance by outputting a display signal to the external display.

Furthermore, in the present embodiment, the opening plate 16 standingly provided in the air duct 4 is provided with a standing holding portion 10g and a restricting portion 13e (open The closed part 13) is fixed to one part of the ventilation duct 4. Instead of this structure, the measuring device 1 includes a plurality of standing holding parts 10g and a restricting part 13e (opening and closing part 13). In this case, the opening plate 16 can be fixed (installed) at a plurality of positions between the second opening 10b and the third opening 10c of the air duct 4. With this, the sizes of the first chamber 15 and the second chamber 17 can be changed. As a result, the measurement device 1 can respond to a wider range of air volume (having higher versatility).

In addition, in the present embodiment, the opening plate 16 standingly arranged on the air duct 4 is restricted from moving toward the longitudinal direction side of the air duct 4 by erecting the holding portion 10g and the restricting portion 13e. Instead of this structure, the opening plate 16 is configured to be movable toward the longitudinal direction of the air duct 4. For example, the opening plate 16 may be configured to move from the second opening 10b to the third opening 10c in the air duct 4 toward the longitudinal direction side of the air duct 4. In this case, in order to prevent the position of the opening plate 16 moving toward the longitudinal direction of the air duct 4 from being shifted due to the air supply of the airflow device, it is preferable to provide a locking mechanism that can fix the opening plate 16 in the measuring device 1 (air duct 4) . For example, the upright holding portion 10g and the restricting portion 13e may be configured to be slidable toward the longitudinal direction of the air duct 4, and the measuring device 1 (vent passage 4) may be provided to fix the upright holding portion 10g and the restricting portion 13e ( The locking mechanism of the opening and closing part 13). With this, the sizes of the first chamber 15 and the second chamber 17 can also be changed. As a result, the measuring device 1 can respond to the air volume of the airflow device in a wider range (having higher versatility).

Furthermore, in the present embodiment, the measuring device 1 is used to measure the air volume and ventilation impedance of the airflow device. Can also replace this structure, measuring device 1 Measure the air volume of the air flow device without measuring the ventilation resistance.

In this embodiment, the measurement device 1 includes a rectifying grid 14 and an auxiliary fan 18. Instead of this structure, the measuring device 1 may not include the rectifying grid 14 and the auxiliary fan 18. In this case, the control board 22 uses the measured values of the pressure (pressure difference) of the air before and after passing through the opening plate 16 obtained by the second pressure sensor 5b to calculate the air volume and the ventilation resistance of the airflow device. Furthermore, the control board 22 may display the calculated air volume and ventilation impedance on the display unit 23.

In addition, the first valve 7a can be adjusted by rotating the cross-shaped adjusting portion to send the air from the first opening 10a input to the third tube 9c through the distributor 8 or to the third tube 9c sends out the outside air input through the 1st outside air port 11a. When the arrow of the adjustment portion of the first valve 7a faces the distributor 8 side or the upper side, the first valve 7a may also send the air from the first opening 10a input through the distributor 8 to the third pipe 9c.

The second valve 7b may also be capable of adjusting the air sent from the first opening 10a input to the fourth tube 9d or the fourth tube 9d by rotating the cross-shaped adjustment portion. The outside air is input through the second outside air port 11b. When the arrow of the adjustment portion of the second valve 7b faces the relay substrate 6 side or the upper side, the second valve 7b may also send the outside air input through the second outside air port 11b to the fourth tube 9d.

On the second side surface of the casing 10 from the second direction, in order to replace the opening plate 16, a specific opening portion for forming an opening on the side surface of the air duct 4 may be formed on the opposite surface opposite to the side surface of the opening plate 16 10f.

The measuring device of this embodiment may be the following first to twelfth measuring devices.

The first measuring device is used to measure the air volume and the ventilation impedance, and is provided with a casing, the casing is formed with a ventilation path having an intake port for taking in air sent from outside, and is characterized in that: : A rectifying grid for rectifying the air taken in from the inlet; a first chamber for taking in the air that has passed through the rectifying grid; a passage for the air taken in by the first chamber is formed The opening plate of the opening; the second chamber that takes in the air that has passed through the opening of the opening plate; and a pressure sensor that measures the first pressure of the air from the inlet to the rectifying grid. The second pressure of the air in the first room and the third pressure of the air in the second room are provided with a specific opening for opening the side surface of the air duct in order to replace the opening plate in the housing, and further provided The opening and closing portion of the specific opening portion can be opened and closed.

Thereby, the side surface of the ventilation duct is opened by the opening and closing portion, and it can be changed to various types of opening plates. Therefore, the versatility of the measuring device for measuring the air volume and the ventilation impedance can be improved. Moreover, when the size of the chamber is used as a reference, the opening area and opening position of the opening plate corresponding to the size of the chamber can also be determined. Therefore, the size of the chamber is not increased to be more than necessary, and measurement can be achieved Miniaturization of the device.

The second measuring device is the first measuring device, wherein the housing is made of a resin material, and the housing is mounted with: a control board connected to the pressure sensor and used to calculate the air volume and ventilation impedance; and display The display unit of the air volume and ventilation impedance calculated by the control board.

This makes it possible to reduce the weight of the housing. Since the control board and the display unit are mounted on the measurement device, the functions related to measurement, calculation, and display can be integrated into one, and the lightweight measurement device can be carried and located in various places. The measurement of the air volume and ventilation impedance of the air flow device.

The third measuring device is the second measuring device, wherein the control board calculates the air volume based on the difference between the second pressure and the third pressure measured by the pressure sensor, and then calculates the air volume The air volume and the first pressure measured by the pressure sensor are used to calculate the ventilation resistance.

The fourth measuring device is any one of the first to third measuring devices, wherein the outlet port on the side opposite to the intake port of the ventilation channel is provided with a device for sending the air of the ventilation channel to the outside Auxiliary fan. By this auxiliary fan, it is possible to prevent the occurrence of a decrease in the volume of air sent from the airflow device of the measurement object due to an unexpected load such as the shape of the air duct itself, and to maintain an appropriate volume of air suitable for measurement. Therefore, the air volume and ventilation impedance can be measured more accurately.

The fifth measuring device is used to measure the air volume and the ventilation impedance of the airflow device to be measured. It is characterized by comprising: a frame body with a ventilation path, the ventilation path having an inlet for taking in air, and The outlet for sending out the taken-in air; the opening member, which is provided in the aforementioned ventilation channel, and forms an opening through which the air taken in from the aforementioned inlet can pass; a pressure sensor, which is used for the pressure sensor To measure the pressure of the air before and after passing through the opening member in the ventilation passage; and the opening member replacement mechanism, which is formed when the opening member is provided It becomes a part of the aforementioned ventilation passage, and the aforementioned opening member can be replaced.

The sixth measuring device is the fifth measuring device, wherein the opening member replacement mechanism includes: forming a part of the ventilation channel to open and replace a specific opening of the opening member; and opening and closing the specific opening The opening and closing member of the department.

The seventh measuring device is the measuring device according to the fifth or sixth, further comprising a control unit connected to the pressure sensor and using the measured value of the pressure of the air before and after passing through the opening member Calculate the air volume and the ventilation impedance, and display the calculated air volume and the ventilation impedance on the display unit.

The eighth measuring device is any one of the measuring devices of the fifth to the seventh, and further includes a rectifying grid for rectifying the air taken in from the intake port, and the pressure sensor measures The first pressure of the air inlet to the rectifying grid, the second pressure of the air before passing through the opening member, and the third pressure of the air after passing through the opening member, the control unit is based on the second pressure and the third pressure The differential pressure is used to calculate the air volume, and the ventilation resistance is calculated based on the calculated air volume and the value of the first pressure.

The ninth measurement device is any one of the measurement devices according to the fifth to eighth, and further includes an auxiliary fan provided at the outlet port and configured to send the air in the ventilation duct to the outside.

The tenth measurement device is any one of the measurement devices of the fifth to ninth, wherein the opening member is provided in the ventilation path so as to be movable in the longitudinal direction of the ventilation path.

The 11th measuring device is any one of the 5th to 9th measuring devices, wherein the opening of the opening member is formed in the center of the opening member as the opening gradually narrows into a funnel shape.

The twelfth measurement device is the seventh measurement device, wherein a plurality of types of opening members are prepared, and identification information is given to each of the plurality of types of opening members, and the control unit further uses the aforementioned The identification information is displayed on the aforementioned display section.

The purpose of the above detailed description is for example and description. With the above teaching, various modifications and changes can be made. It is not intended to be exhaustive or to limit the invention to the precise forms disclosed herein. Although the present invention is described using specific language of structural features and/or method actions, it can be understood that the present invention defined by the scope of the patent application is not limited to the specific features or actions described above. Rather, the specific features or actions disclosed above are merely exemplary forms of implementing the patent scope.

2‧‧‧Access

3‧‧‧Export

4‧‧‧Ventilation duct

10‧‧‧Housing

10a‧‧‧First opening

10b‧‧‧The second opening

10c‧‧‧The third opening

10g‧‧‧Establish a holding part

14‧‧‧Rectifying grid

15‧‧‧ Room 1

16‧‧‧Opening plate

17‧‧‧ Room 2

18‧‧‧Auxiliary fan

20‧‧‧Control device

21‧‧‧Power Department

22‧‧‧Control board

23‧‧‧ Display

24‧‧‧Operation buttons

Claims (10)

A measuring device is used to measure the air volume and ventilation impedance of the air flow device. It is characterized by: a frame body with a ventilation channel, the ventilation channel has an inlet for taking in air and sends out the taken in air The delivery port; the opening member, which is provided in the ventilation channel and has an opening portion through which the air taken in from the inlet port passes; a pressure sensor, which measures the foregoing passing through the ventilation channel The pressure of the air before and after the opening member; the opening member replacement mechanism, which is formed as part of the aforementioned air passage and can be used to replace the aforementioned opening member; the control unit, which is in contact with the aforementioned pressure sensor Connection, using the measured values of the pressure of the air before and after passing through the opening member, to calculate the air volume and the ventilation impedance of the airflow device, and to display the calculated air volume and the ventilation impedance on the display unit; To rectify the air taken in from the intake port; the pressure sensor measures the pressure of the air from the intake port to the rectification grid in the ventilation duct, that is, the first pressure, the air from the rectification grid to the opening member The pressure is the second pressure and the pressure of the air after passing through the opening member is the third pressure. The control unit then calculates the air volume based on the difference between the second pressure and the third pressure, and the calculated air volume The value of the first pressure is used to calculate the ventilation impedance. As in the measurement device of claim 1, the opening member replacement mechanism includes: a specific opening provided in a part of the ventilation channel; and an opening and closing member for opening and closing the specific opening. The measurement device according to item 1 or 2 of the patent application scope, further comprising an auxiliary fan provided at the outlet port, and used to send the air of the ventilation duct to the outside. The measurement device according to item 1 or 2 of the scope of the patent application, wherein the opening member is provided in the ventilation path and is movable in the longitudinal direction of the ventilation path. The measurement device according to item 1 or 2 of the patent application range, wherein the opening of the opening member has a gradually narrowed funnel-like shape, and is formed in the center of the opening member. The measurement device according to item 1 or 2 of the patent application scope, wherein the opening member is provided with identification information according to its type, and the control unit displays the identification information of the opening member provided in the ventilation duct at The aforementioned display section. The measurement device according to item 1 of the patent application scope, wherein the ventilation duct is provided with: a rectifying grid for rectifying the air taken in from the inlet; the first chamber, the first The chamber takes in the air passing through the rectifying grid; and the second chamber, the second chamber takes in the opening through the opening member Part of the air, the opening of the opening member allows the air taken in by the first chamber to pass, and the pressure sensor measures: the pressure of the air from the inlet to the rectifying grid is the first pressure The pressure of the air in the first chamber is the second pressure, and the pressure of the air in the second chamber is the third pressure. The measurement device according to item 7 of the patent application scope, wherein the frame system is made of resin material, and the frame body is provided with: a control board connected to the pressure sensor to calculate the air volume and Ventilation impedance; and a display section for displaying the air volume and ventilation impedance calculated by the control board. The measurement device according to item 8 of the patent application scope, wherein the control board calculates the air volume based on the difference between the second pressure and the third pressure, and then calculates the ventilation based on the calculated air volume and the first pressure impedance. The measurement device according to any one of items 7 to 9 of the patent application scope, further comprising an auxiliary fan provided at the outlet port, and used to send the air of the ventilation duct to the outside.

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