JP2002022597A - Airflow visualization apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an airflow visualization apparatus being excellent in portability (small, power-saving and lightweight) and having an improv increased degree of freedom of its attitude in use. SOLUTION: The airflow visualization apparatus includes a body block 11 having a pure water excitation space 12 filled with pure water, and an ultrasonic transmitter 13 disposed below the excitation space 11. A discharge hole 12a in an apparatus body is formed above the excitation space 12. Since the pure water is excited by the ultrasonic transmitter 13 to generate a mist, which is then discharged from the discharge hole 12a, the path of migration of the mist is short and the structure is simple, and troubles such as re-condensation during migration of the mist do not occur and the amount of the mist discharged from the discharge hole does not decrease, so that the mist can be efficiently discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air flow visualization apparatus suitable for measuring a place where dust is generated or a path along which the dust moves or diffuses in an air flow in a clean room or an environment where dust is disliked. For miniaturization.

[0002]

2. Description of the Related Art In a clean room or an environment that dislikes dust, in order to maintain a predetermined cleanliness, a place where dust is generated,
Alternatively, it is necessary to measure a path along which the dust moves or diffuses in the airflow, and to take a measure corresponding to the measurement result. Conventionally, there is a method of measuring the wind speed, pressure, and direction of the air flow as a measurement method. As one of the methods, a method of visualizing the air flow has been used as a measurement means capable of appealing to human intuition. A conventional example of this airflow visualization device will be described below.

FIG. 5 is a conceptual diagram of an air flow visualization device using liquid nitrogen. A pure water tank 51 is provided in the housing 50, and pure water 52 is stored in the pure water tank 51 and is heated by an electric boiler 53. Electric boiler 53
Is controlled by the power supply / control circuit 55. Further, a water level gauge 56 is attached to the pure water tank 51 to prevent emptying. A nitrogen tank 58 is further provided in the housing 50, and a low-temperature liquid nitrogen 59 is stored in the nitrogen tank 58. This nitrogen tank 58 is connected to the pure water tank 51 via a pipe 60. A duct 61 is connected to the nitrogen tank 58,
The duct 61 protrudes outside the housing 50.

In the air flow visualization device shown in FIG. 5, when the pure water 52 in the pure water tank 51 is heated and boiled by the electric boiler 53, steam 57 is generated.
0, and the liquid nitrogen 59
, And rapidly cooled to form minute water droplets, i.e., mist 60. And this mist 60 is a duct 61
Is led to the outside.

FIG. 6 is a conceptual diagram of an air flow visualizing device using an ultrasonic oscillator. A pure water tank 71 is provided in the housing 70, and the pure water tank 71 stores pure water 72. A plurality of ultrasonic oscillators 73 are provided at the bottom of the pure water tank 71. A blower 74 is provided in the housing 70, and the blower 74 is
5 and a filter 76 for removing dust from the air sent out by the fan 75. The driving of the ultrasonic oscillator 73 and the fan 75 is controlled by the power supply / control circuit 77. The blower 74 is a pipe 78
Through a pure water tank 71. A duct 80 is connected to the pure water tank 71, and the duct 80 protrudes outside the housing 70.

In the air flow visualizing device shown in FIG. 6, when the ultrasonic oscillator 73 is driven and vibrated, the pure water 72 in the pure water tank 71 becomes a mist 79, and the mist 79 is pushed out by the blowing from the blowing device 74. Then, it moves inside the duct 80 and is discharged to the outside.

[0007]

The air flow visualization device using liquid nitrogen shown in FIG. 5 has the following problems. A liquid nitrogen tank, an electric boiler, a pure water tank, and piping for connecting these, a control circuit, a large power supply, and the like are required, which complicates the structure, increases the size and weight, and increases the cost. . There is no portability due to the large size and heavy weight,
No mobility. Liquid nitrogen needs to be injected. Further, a long preparation operation such as heating and pressurizing time by a boiler is required, and the preparation operation is complicated. The procurement cost of liquid nitrogen is high and the power consumption is large.

The air flow visualization device using the ultrasonic oscillator shown in FIG. 6 has the following problems. Since the path from the mist generating section to the outlet for discharging the mist is long, the mist is recondensed during the movement of the mist, and the amount of mist discharged from the outlet is reduced. In order to prevent a decrease in the amount of mist, it is necessary to increase the size of the ultrasonic oscillator and mount a plurality of ultrasonic oscillators, resulting in an increase in size and complexity of the apparatus. Increasing the size of the ultrasonic oscillator causes the temperature of pure water to rise,
Since the mist generation efficiency is deteriorated, it is necessary to suspend the work and cool down, so that continuous operation is impossible. This airflow visualization device has a simpler structure than the airflow visualization device of FIG. 5, but is still large and heavy, so it is limited to use on a floor and lacks portability. Further, since the moving path of the mist in the main body is long and complicated, the mist is easily condensed and accumulated on the way. When the main body is tilted, the pure water surface is tilted to narrow the mist path and lower the discharge efficiency. Therefore, it is necessary to always keep the horizontal level when using the apparatus.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has excellent portability (small size, small power, light weight) and improved freedom of posture during use. An object of the present invention is to provide an airflow visualization device.

[0010]

Means for Solving the Problems (1) An airflow visualizing device according to one aspect of the present invention comprises a main body block provided with a vibrating space filled with a liquid, and a super block disposed below the vibrating space. And a discharge hole of the apparatus main body formed above the excitation space. In the present invention, a mist discharge hole of the apparatus main body is formed in the upper part of the vibration space, and the liquid is vibrated by an ultrasonic oscillator arranged in the lower part of the vibration space to generate mist, and the discharge is performed. Since the mist is discharged to the outside from the hole, the mist movement path is short and the structure is simple, so that inconvenience such as recondensation does not occur during the movement of the mist, and the amount of the mist discharged from the discharge hole does not decrease. Therefore, mist can be efficiently released. Therefore, the size of the ultrasonic oscillator can be reduced, and a rise in the temperature of the liquid can be avoided, so that a continuous operation is also possible.
Further, the miniaturization of the ultrasonic oscillator leads to a reduction in the size, weight, and power consumption of the entire device, and makes the device excellent in portability.
Further, since the discharge hole of the apparatus main body is provided in the upper part of the vibration space, the liquid is hardly spilled, and the degree of freedom of the posture during use can be improved.

(2) An air flow visualization device according to another aspect of the present invention is the air flow visualization device according to the above (1), wherein a nozzle is provided at a discharge hole of the device main body. In the present invention, since the mist generated in the vibration space is discharged to the outside from the nozzle through the discharge hole of the apparatus main body, the moving path of the mist is short and the structure is simple, so that the mist can be efficiently discharged. it can.

(3) An airflow visualization device according to another aspect of the present invention is the airflow visualization device according to the above (1) or (2), wherein the bottom of the excitation space is covered with an ultrasonic oscillator. . In the present invention, the cross-sectional area of the excitation space and the upper surface area of the oscillating portion of the ultrasonic oscillator are set close to each other, for example, in a relationship of cross-sectional area> upper surface area of the oscillating portion. Further, the distance (water depth) between the liquid surface and the surface of the ultrasonic oscillator is optimized (by adjusting the position of the upper surface of the duct 18 in FIG. 1). By doing so, the efficiency per unit weight of the liquid and the efficiency per ultrasonic vibration energy when generating a mist by vibrating the liquid in the vibration space are improved. It is possible to reduce the size and weight, and it is excellent in portability.

(4) An airflow visualization device according to another aspect of the present invention is the airflow visualization device according to any one of the above (1) to (3), wherein the excitation space has a vertically long cylindrical shape. In the present invention, since the excitation space has a vertically long cylindrical shape, even if the device is tilted during the work, it is possible to avoid a state where the liquid leaks or the ultrasonic oscillator is exposed from the liquid. In addition, the degree of freedom in posture during use can be improved.

(5) An airflow visualization device according to another aspect of the present invention is the airflow visualization device according to any one of the above (1) to (4), wherein the main body block comprises: a mounting portion for removably mounting the tank; It is provided with a duct for communicating the mounting portion with the excitation space. In the present invention, the tank is attached so that the liquid from the tank is filled into the vibration space via the duct.

(6) An airflow visualizing device according to another aspect of the present invention, in any one of the above (1) to (5), detachably mounted on the main body block and supplying a liquid to the vibration space. It is equipped with a tank to perform. In the present invention, the tank is attached to the main body block and supplies the liquid to the vibration space. Then, when the liquid in the tank is exhausted, the tank is removed from the main body block, the tank is filled with liquid, and then attached to the main body block again.

(7) An air flow visualization device according to another aspect of the present invention is the air flow visualization device according to the above (6), wherein at least a part of the tank is formed of a transparent member. In the present invention, since at least a part of the tank is made of a transparent member, the presence or absence of the liquid in the tank can be easily grasped.

(8) An airflow visualization device according to another aspect of the present invention is the airflow visualization device according to the above (6) or (7), in which a valve body which is normally closed is built in, and is attached to and detached from the tip of the tank. The tank includes a cap that can be freely mounted, and the tank is removably mounted on the mounting portion of the main body block via the cap. In the present invention, a cap is attached to the tip of the tank, and when the tank is removed from the main body block, the valve body is in a closed state, so that the liquid does not spill when the tank is carried.

(9) An airflow visualization device according to another aspect of the present invention is the airflow visualization device according to the above (8), wherein the cap is detachably mounted on the mounting portion of the main body block and mounted on the mounting portion of the main body block. Then, the valve element is opened. In the present invention, when the cap attached to the tip of the tank is attached to the attachment portion of the main body block, the valve body is opened, and the liquid in the tank is supplied to the vibration space of the main body block.

(10) In an air flow visualization device according to another aspect of the present invention, in the above-mentioned devices (6) to (9), the tank fills the vibration space with a predetermined level of liquid. In the present invention, the liquid is supplied from the tank to the vibrating space, and the level of the liquid at that time is set so as to be a predetermined level.

(11) An airflow visualization device according to another aspect of the present invention, in the apparatus of (1) to (10) above, wherein an extruded air supply device for extruding mist generated in the vibration space to the discharge hole side. It is provided with. In the present invention, the mist is discharged to the outside by the extruded air from the extruded air supply device.

(12) An airflow visualization device according to another aspect of the present invention is the airflow visualization device according to the above (11), wherein the extruded air supply device includes a motor and a pump driven by the motor. In the present invention, since the pump is driven by the motor to send out the extruded air, the scattering distance of the mist becomes longer.

(13) An airflow visualization device according to another aspect of the present invention is the airflow visualization device according to the above (11) or (12),
An introduction hole for pushing out air into the excitation space,
It is provided on the ejection hole side of the excitation space of the main body block. In the present invention, since the mist is pushed out by the air pushed out from the introduction hole provided on the discharge hole side of the excitation space of the main body block, the mist can be efficiently discharged.

(14) An airflow visualization device according to another aspect of the present invention is the airflow visualization device according to any one of (11) to (13), wherein the extruded air supply device is a filter for removing dust from the extruded air. It is provided with. In the present invention, dust is removed from the extruded air by the filter so that the dust is not mixed into the mist.

(15) An airflow visualization device according to another aspect of the present invention is the airflow visualization device according to the above (14), wherein the pushing air supply device is provided with a check valve provided between the filter and the introduction hole. Things. In the present invention, the check valve prevents the mist in the excitation space from going to the filter side, so that the filter does not contain moisture.

(16) An air flow visualization device according to another aspect of the present invention is the air flow visualization device according to any one of (9) to (15), wherein the pushing air supply device continues to be driven even after the operation is completed. It is. In the present invention, by continuing to drive the pushing air supply device even after the end of the work,
Prevent germs from being generated by the moisture attached to the device.

(17) An airflow visualization device according to another aspect of the present invention is the airflow visualization device according to any one of the above (1) to (15), further comprising a water level meter for measuring a liquid level in the excitation space,
When the liquid level falls below a predetermined level, the driving of the ultrasonic oscillator is stopped. In the present invention, the liquid level in the vibration space is detected by the water level gauge, and when the liquid level becomes equal to or lower than a predetermined level, the driving of the ultrasonic oscillator is stopped to prevent the ultrasonic oscillator from being destroyed due to so-called emptying. I have.

(18) An air flow visualization device according to another aspect of the present invention is the air flow visualization device according to the above (17), wherein the water level gauge is provided with a light emitting element and a light receiving element provided side by side, and a liquid filled in the vibration space. It is made of a resin having substantially the same (including the same) transmittance, and a molded body formed by molding a light emitting element and a light receiving element. In the present invention, when there is no liquid at the location of the water level meter in the vibration space, light from the light emitting element is reflected by the mold body and received by the light receiving element. When there is a liquid, light from the light emitting element passes through the mold body and cannot be received by the light receiving element. In this way,
Whether or not the liquid level in the excitation space is equal to or higher than a predetermined level is detected based on whether or not light is received by the light receiving element.

(19) An airflow visualization device according to another aspect of the present invention is the airflow visualization device according to the above (18), wherein the molded body is provided with a triangular cross-section projection on the side where light from the light emitting element travels. Things. In the present invention, when there is no liquid at the location of the water level meter in the excitation space, light from the light emitting element is reflected by the projection of the mold body and received by the light receiving element.

(20) An airflow visualization device according to another aspect of the present invention is the airflow visualization device according to any one of the above (1) to (19), wherein the main body block can be made of a metal material.
In the present invention, when the main body block is made of a metal material, the heat generated by the vibration by the ultrasonic oscillator is efficiently radiated to the outside, and a rise in temperature can be avoided.

(21) An airflow visualization device according to another aspect of the present invention is the airflow visualization device according to any one of the above (1) to (20), except that a power supply unit is externally provided. In the present invention, an external power supply unit is used, for example, AC
AC by combination of adapter and AC power cable
The size and weight of the apparatus main body are reduced by using an outlet of a power source or by using a portable battery mounted on a waist belt of an operator, for example.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. FIG. 1 is a cross-sectional view illustrating a configuration of an airflow visualization device according to Embodiment 1 of the present invention. In this airflow visualization device, the housing 10 is made of a metal material, and a main body block 11 is provided at an upper portion thereof.
Is arranged. The main body block 11 has a vertically long columnar pure water excitation space 12 formed therein, and an ultrasonic oscillator 13 is attached in such a manner as to seal the bottom opening. However, the location where the vibration of the ultrasonic oscillator 13 is generated does not come into contact with the inner wall of the pure water vibration space 12 so that the vibration is not transmitted directly to the main body block 11. A mist discharge hole 12a of the apparatus main body is formed above the pure water excitation space 12 of the main body block 11. A water level gauge 14 is embedded in the inner wall of the pure water excitation space 12 (the details of the water level gauge will be described later).

Further, a mounting portion 15 for a pure water tank is formed in the main body block 11, a screw portion 16 is formed in an upper opening of the mounting portion 15 for the pure water tank, and a screw portion 16 is formed in a lower portion. A push rod 17 for pushing and opening a ball valve of a pure water tank described later is implanted. The mounting portion 15 of the pure water tank communicates with the pure water exciting space 12 via the duct 18. In addition, an introduction hole 19 through which extruded air for extruding mist generated in the pure water excitation space 12 to the outside is formed on the upper side of the pure water excitation space 12 in the main body block 11. A nozzle 20 for guiding the mist to the outside is attached to the discharge hole 12a above the pure water vibration space 12.

A cap 22 is attached to the front end of the pure water tank 21. The cap 22 includes a cap body 23 screwed to the front end of the pure water tank 21 and the cap body 2
3 and a ball valve 25 which is pressed downward by the spring 24 to be closed. Then, the pure water tank 21 and the cap 2
When the pure water tank 21 is filled with the pure water 1, the cap 22 is removed. When attaching the pure water tank 21 to the main body block 11, the screw portion 23 a provided at the lower portion of the cap main body 23 is screwed to the screw portion 16 of the mounting portion 15. When the pure water tank 21 is attached to the main body block 11, the push rod 17 pushes up the ball valve 25, the ball valve 25 is opened, and the pure water 1 filled in the pure water tank 21 passes through the duct 18. The process moves to the pure water excitation space 12. At this time, the water level of the pure water exciting space 12 is configured to be a constant level that balances the water pressure of the pure water tank 21 and the atmospheric pressure.

A control circuit unit 30 is arranged at the bottom of the airflow visualizing device in the housing 10, and a push-out air supply device 31 is arranged at the top. The pushing air supply device 31 is provided with an eccentric shaft (or eccentric cam) 3.
And a filter 35 with a built-in check valve, which is driven by the rotation of the eccentric shaft 32, and a filter 35 with a built-in check valve. 35 and between the filter 35 with a built-in check valve and the introduction hole 19 are connected by pipes 36 and 37, respectively.

A posture sensor (not shown) is provided in the housing 10. When the housing 10 is tilted by a predetermined angle or more, the posture sensor detects the posture and outputs it to the control circuit unit 30. The control circuit unit 30 stops driving the ultrasonic oscillator 13. The control circuit unit 30 incorporates an oscillation circuit for driving the ultrasonic oscillator 13 and the like, and is also provided with an electromagnetic sealing material for preventing electromagnetic waves from the oscillation circuit.

Further, a hook for a waist belt (not shown) is provided on the outside of the housing 10, and a worker can carry it by hanging a shoulder belt (made of, for example, a dust-free material) on the hook. It is. Also, a tripod fixing member 39 is attached to the bottom of the housing 10,
Used when fixing to three legs (not shown). Further, a power supply unit (not shown) for driving the control circuit unit 30 is not built in the housing 10, and an AC power outlet is used by combining an AC adapter and an AC power cable. Or, for example, a portable battery is attached to an operator's waist belt for use.

FIG. 2 is a perspective view of the water level gauge 14 of FIG.
FIG. 3 is a cross-sectional view of the water level gauge 14. The water level gauge 14 comprises a sensor 40 and a transparent plastic mold 41 containing the sensor 40.
Is connected to the control circuit unit 30 via the. The sensor 40 includes a light emitting element 40a and a light receiving element 40b, and a protrusion 4 having a triangular cross section is provided on the front side (the pure water excitation space 12 side) of the plastic mold 41.
1a is formed.

FIGS. 4A and 4B are explanatory diagrams showing the operation of the water level gauge 14. FIG. When there is no pure water on the front side of the water level gauge 14, as shown in FIG. 4A, light from the light emitting element 40a is reflected by the projection 41a and received by the light receiving element 41b. When pure water is present on the front side of the water level gauge 14, as shown in FIG.
The light from the lens escapes from the protrusion 41a and does not go to the light receiving element 41b. Therefore, whether or not the water level in the pure water excitation space 12 is at a predetermined level is detected based on whether or not the light receiving element 41 is receiving light.

Next, the operation of the airflow visualization device according to this embodiment will be described. When the control circuit unit 30 drives the ultrasonic oscillator 13 in a state where the pure water exciting space 12 is filled with the pure water 1, the airflow visualization device of FIG. 1 generates mist due to energy generated by the driving. Becomes When the motor 33 is driven by the control circuit unit 30 and the eccentric shaft 32 drives the pump 34, the extruded air is sent out to the filter with built-in check valve 36 via the pipe 36. In the non-return valve built-in filter 36, after the dust or the like is removed by the filter, it is sent out to the introduction hole 19 via the non-return valve. The extruded air sent to the introduction hole 19 extrudes the mist 21 generated by driving the ultrasonic oscillator 13 and discharges the mist 21 from the nozzle 20 through the discharge hole 12a. By observing the flow of the mist 21 discharged from the nozzle 20, it is possible to measure, for example, a location where dust is generated in a clean room and a path where the dust moves or diffuses in an air flow.

The pure water 1 in the pure water exciting space 12
Is discharged from the nozzle 20 as a mist 21, which lowers the level of the pure water 1 in the pure water vibration space 12, but the water level is supplied from the pure water tank 21 and the pure water vibration space 12 Of the pure water 1 is kept constant. Since the pure water tank 21 is made of a transparent member, it is possible to easily grasp the state of the pure water 1 in the pure water tank 21 and, if necessary, attach the cap 22 to the main body block. 11 from the mounting portion 15 of the pure water tank 21
Is filled with pure water. Then, the cap 22 is mounted on the mounting portion 15 of the main body block 11. And pure water tank 2
When the pure water 1 is depleted, the pure water 1
The water level cannot be kept constant and the water level starts to fall. When the level falls below a predetermined level, the water level gauge 14 is in the state shown in FIG.
Light from Oa is received and its output is sent to the control circuit unit 30 via the cable 42. Control circuit unit 30
Receives the output, stops the driving of the ultrasonic oscillator 13 to prevent the ultrasonic oscillator 13 from being broken by so-called emptying.

When the operation is completed, the driving of the ultrasonic oscillator 13 is stopped, the pure water tank 21 is removed, and the water in the pure water exciting space 12 is removed. The water in the pure water excitation space 12 is
The nozzle 20 may be removed downward by turning the housing 10 upside down, or a separate drain pipe (not shown) may be provided and the normally closed valve may be opened to remove the nozzle. After removing the pure water in this manner, the motor 3
It is desirable that the driving of No. 3 be continued so that various bacteria are not generated in the pure water vibration space work 12, the nozzle 20 and the like in a wet state. Then, the ultrasonic oscillator 13 and the motor 33
May be provided with corresponding switches. However, the motor 33 is driven for a predetermined time when the ultrasonic oscillator 13 is in a driving state and after the ultrasonic oscillator 13 is stopped. 13 may be driven.

Further, in the air flow visualization device shown in FIG.
A discharge hole 12a of the apparatus main body is provided above the vibration space 12,
In addition, since the pure water excitation space work 12 has a vertically long cylindrical shape, there is little possibility that the pure water 1 will spill even if the housing 10 is inclined, or that the water level will be lower than the water level gauge 12. . For this reason, even when the housing 10 is tilted when the worker carries the airflow visualization device of FIG. 1 while working, it does not stop every time. However, when the housing 10 is extremely inclined, such as when the worker falls down, an attitude sensor (not shown) detects the attitude of the housing 10 and stops the operation.

The followability of the air flow visualization device (weight of the prototype: about 14 kg) in FIG. 1 and the air flow visualization device (apparatus weight: about 70 kg) in FIG. 5 (visible length of the mist)
1 was 1600 mm and that of FIG. 5 was 1800 mm, and it was confirmed that the present invention can be downsized and its function is not inferior to the conventional large one. .

As described above, the airflow visualization device according to the present embodiment can be miniaturized, so that it not only measures the airflow in a large space such as a clean room, but also locally It is also possible to measure the flow of airflow about the part.

Embodiment 2 The above main body block 1
Although 1 is made of a plastic resin, it is also preferable to use a metal material, for example, aluminum in order to further improve heat conduction. In addition, although the example in which the power supply unit is externally described has been described, a battery may be incorporated. In the above example, the example in which the discharge holes 12a of the apparatus main body are formed in the main body block 11 has been described. However, the discharge holes 12a may be separate from the main body block 11. For example, it may be formed by a housing. Also, the filter 35 with a built-in check valve may have a separate structure. Further, the example in which the water level gauge 14 in FIG. 2 is installed vertically and used has been described, but the water level gauge 14 may be installed horizontally and used.

[0046]

As described above, according to the present invention, the main body block having the vibration space filled with the liquid, and the ultrasonic oscillator disposed below the vibration space, are provided. The mist discharge hole of the device body is formed at the top, and the mist is generated by vibrating the liquid with an ultrasonic oscillator, so the mist movement path is short and the structure is simple, so during the movement of the mist Since inconvenience such as recondensation does not occur and the amount of mist discharged from the discharge holes does not decrease, mist can be discharged efficiently. For this reason, low power,
It is possible to reduce the size and weight, and it is excellent in portability.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of an airflow visualization device according to an embodiment of the present invention.

FIG. 2 is a perspective view of the water level gauge of FIG. 1;

FIG. 3 is a cross-sectional view of the water level gauge of FIG. 1;

FIGS. 4A and 4B are explanatory diagrams showing the operation of the water level gauge.

FIG. 5 is a conceptual diagram of an airflow visualization device using liquid nitrogen.

FIG. 6 is a conceptual diagram of an airflow visualization device using an ultrasonic oscillator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Case 11 Body block 12 Pure water excitation space 13 Ultrasonic oscillator 14 Water level gauge 15 Attachment part of pure water tank 16 Screw 17 Push rod 18 Duct 20 Nozzle 21 Pure water tank 22 Cap 31 Extruded air supply device 33 Motor 34 Diaphragm Type pump

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Makoto Hikami 1-17-1-402 Sugamo, Toshima-ku, Tokyo Clean Techno Service Co., Ltd. F-term (reference) 2G023 AB24

Claims (21)

[Claims] 1. A main body block having a vibrating space filled with a liquid, and an ultrasonic oscillator disposed below the vibrating space, wherein a mist of the apparatus main body is discharged above the vibrating space. An airflow visualization device characterized by forming holes. 2. The airflow visualization device according to claim 1, wherein a nozzle is provided at the discharge hole of the mist. 3. The air flow visualization device according to claim 1, wherein the ultrasonic oscillator is disposed so as to cover a bottom of the excitation space. 4. The air flow visualization device according to claim 1, wherein the vibration space has a vertically long cylindrical shape. 5. The apparatus according to claim 1, wherein the main body block includes a mounting portion for detachably mounting the tank, and a duct communicating the mounting portion with the vibration space. An airflow visualization device according to any one of the above. 6. The air flow visualization device according to claim 1, further comprising a tank that is detachably attached to the main body block and that supplies a liquid to the vibration space. 7. The airflow visualization device according to claim 6, wherein at least a part of the tank is formed of a transparent member. 8. A built-in valve body which is normally closed.
The airflow visualization according to claim 6, further comprising a cap detachably mounted on a tip of the tank, wherein the tank is detachably mounted on a mounting portion of the main body block via the cap. apparatus. 9. The airflow visualization device according to claim 8, wherein the cap is detachably attached to a mounting portion of the main body block, and the valve body is opened when the cap is mounted to the mounting portion of the main body block. 10. The airflow visualization device according to claim 6, wherein the tank fills the vibration space with a predetermined level of liquid. 11. The apparatus according to claim 1, further comprising an extruding air supply device for supplying extruding air for extruding mist generated in the vibrating space to the discharge hole side. Airflow visualization device. 12. The airflow visualization device according to claim 11, wherein the extruded air supply device includes a motor and a pump driven by the motor. 13. The air flow visualization device according to claim 11, wherein an introduction hole for sending out the extruded air into the vibration space is provided on a discharge hole side of the vibration space of the main body block. . 14. The airflow visualizing device according to claim 11, wherein the extruded air supply device includes a filter for removing dust from the extruded air. 15. The airflow visualization device according to claim 14, wherein the pushing air supply device includes a check valve provided between the filter and the introduction hole. 16. The airflow visualization device according to claim 11, wherein the pushing air supply device continues to be driven even after the operation is completed. 17. The apparatus according to claim 1, further comprising a water level meter for measuring a liquid level in the vibration space, wherein the driving of the ultrasonic oscillator is stopped when the liquid level falls below a predetermined level. An airflow visualization device according to any of the above items. 18. The water level gauge comprises a light emitting element and a light receiving element provided side by side, and a resin having substantially the same transmittance as a liquid filled in the vibration space, and molding the light emitting element and the light receiving element. 18. The airflow visualization device according to claim 17, comprising a molded body. 19. The airflow visualization device according to claim 18, wherein the mold body is provided with a protrusion having a triangular cross section on a side on which light from the light emitting element travels. 20. The airflow visualization device according to claim 1, wherein the main body block is made of a metal material. 21. The airflow visualization device according to claim 1, wherein a power supply unit is provided externally.