JPS60223937A - Air blowing device - Google Patents

Abstract

PURPOSE:To prevent disturbance of air stream and invasion of external air into a room when atmospheric wind is strong by a method wherein an air curtain is constituted so that the speed of discharging air of the air curtain is permitted to speed up or slow down in accordance with the strength of the atmospheric wind. CONSTITUTION:The strength of atmospheric wind is sensed by a wind pressure sensor 4 and the signal of the sensor 4 is sent into an output unit 6. As a result, the output of the output unit 6 is proportional to the strength of the atmospheric wind. A revolving number control unit 7 is driven by the output. Accordingly, the rotating number of motor 2 of an air curtain main body 1 becomes proportional to the output of the output unit 6. On the other hand, the speed of discharging air of the air curtain main body 1 becomes proportional to the rotating number of the motor 2 or the revolving numbers of blades 3a, 3b, therefore, the speed of discharging air of the main body 1 becomes proportional to the strength of the atmospheric wind. According to this method, the speed of discharging air is quickened when the atmospheric wind is strong, therefore, disturbance of air stream due to the atmospheric wind and invasion of atmospheric air into the room may be prevented.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention prevents indoor air from flowing out to the outdoors.
This article relates to an air blowing system using an air blowing device (hereinafter referred to as an air curtain) for forming an air current for the purpose of hand washing.

Structure of the conventional example and its problems As shown in FIG. 1, the conventional air curtain for blocking outside air is controlled by an attached switch 102 to control the air curtain main body 101 between OFF and OFF, and OFF and OFF, and OFF and OFF, and OFF and OFF, and OFF and OFF, and OFF and OFF, and OFF and OFF, and MEDIA and LOW. was.

Therefore, if you set one speed while driving, you will always continue to drive at the set speed regardless of the presence or strength of the outside wind, and you will not be able to respond quickly to the strength of the outside wind that changes from moment to moment. When the wind blows, as shown in Figure 2, wall surface 1
Airflow 1 of air curtain body 101 attached to 03
04 is disturbed near the lower part 104a where the wind speed becomes weaker, outside air enters the room, and the effect of preventing outside air from entering can no longer be exhibited. In addition, in order to prevent this, as shown in Figure 3, by increasing the set discharge wind speed and making the airflow 105 stronger, when there is no outside wind or it is weak, the airflow 105a flows along the floor surface and causes discomfort. It gives air, attracts outside air, and stirs up dust on the floor. Also,
It is almost impossible to manually change the discharge wind speed from strong to medium to weak depending on the strength of the outside wind, and it has drawbacks such as the inability to effectively block outside air at all times.

OBJECT OF THE INVENTION The present invention solves these conventional drawbacks, and has the purpose of eliminating the need for human intervention, preventing airflow from being disturbed even when the outside wind is strong, preventing outside air from entering, and reducing the amount of outside wind that is weak or non-existent. To provide a ventilation system that can effectively shut off outside air at all times, without causing an unpleasant airflow that flows over the floor even when the room is open, and without attracting outside air or kicking up dust on the floor. .

Structure of the Invention The present invention consists of an air curtain with built-in blades and a motor to flow air along an opening in a room, and a wind pressure system that senses the strength of the outside wind and sends a signal according to the strength. It consists of a sensor, an output section that outputs an output according to the signal sent from the wind pressure sensor, and a rotation speed control section that changes the rotation speed of the air curtain motor according to the output from the output section. The strength of the air curtain is detected by a wind pressure sensor, a signal is sent to the output part, the output from the output part drives the rotation speed control part, the rotation speed of the air curtain motor is changed, the rotation speed of the blade is changed, and the air・Changes the discharge air speed of the curtain to correspond to the ever-changing outside wind, and when the outside wind is strong, the discharge wind speed is automatically increased to prevent airflow from being disturbed and prevent outside air from entering the room. In addition to automatically slowing down the discharge air speed when the outside air is weak, it prevents unpleasant airflow from flowing along the floor surface, prevents outside air from being drawn in, and prevents dust from being kicked up on the floor surface, making it effective. It is constructed to block outside air.

DESCRIPTION OF EMBODIMENTS Examples of the present invention will be described below with reference to FIGS. 4 to 10.

In the figure, 1 is an air curtain body that is driven by a motor 2 and has built-in vanes 3a and 3b that form an airflow, and 4 is an air curtain body that is installed near an opening in a wall 6 to which the air curtain body 1 is attached. 6il-j: an output part that receives the signal from the wind pressure sensor 4 and outputs an output; 7 is driven by the output part 6, and controls the rotation speed of the motor 2 of the air curtain body 1; 8 is a control unit in which the output section 6 and the rotation speed control section 7 are housed in one case; 9 is a control unit provided in the control unit for switching between automatic operation, constant speed operation, and off. The operation selector switch 10 is an automatic operation display lamp that lights up during automatic operation to notify automatic operation.

In the above configuration, the wind pressure sensor 4 senses the strength of the outside wind and sends the signal to the output section 6. Drive that part 7. Therefore, the rotation speed of the motor 2 of the air curtain body 1 is proportional to the output from the output portion 6, as shown in FIG. On the other hand, the discharge wind speed of the air curtain main body 1 is proportional to the number of rotations of the 10th and 3b, so the discharge wind speed of the air curtain main body 1 is proportional to the strength of the outside wind. Therefore, when the outside wind is strong, the discharge wind speed increases, the airflow is disturbed by the outside wind, and the outside air is prevented from entering the room. 1. When there is no or weak outside wind, the discharge wind speed is slowed down, which prevents air currents that flow over the floor surface and cause discomfort, and also prevents outside air from being drawn in and dust from being blown up on the floor surface. Further, the operation changeover switch 9 can be used to switch between automatic operation and constant speed operation, and the automatic operation display lamp 10 lights up during automatic operation.

Effects of the Invention As described above, according to the present invention, it is possible to automatically speed up or slow down the discharge wind speed of the air curtain according to the strength of the outside wind, without any manual intervention. I can do it,
When the outside wind is strong, the airflow is disturbed and the outside air is prevented from entering the room, and when the outside wind is weak or absent, it prevents the air from flowing over the floor and causing discomfort.17. ? In addition, if you attract two L cases, you will not be able to stir up dust on the floor F, and you can effectively block the outside air at all times, even if there is a strong outside wind. It is something that demonstrates the.

[Brief explanation of drawings]

Figure 1 is a perspective view of the conventional air curtain and switch, Figure 2 is an airflow diagram when the air curtain is exposed to outside wind, and Figure 3 is a diagram of the air curtain with an accelerated discharge wind speed. Fig. 4 is a connection diagram with the control part of the ventilation system according to an embodiment of the present invention;
Figure 6 is a connection diagram of the ventilation system, Figures 6 and 7 are additional diagrams of the ventilation system, Figure 8 is the outside air roughness of the ventilation system, and Figure 10 is the rotation speed - discharge of the ventilation system. 1
It is a graph showing an example of wind speed characteristics. 1...Air m-curtain body, 2...Motor, 3...Blade, 4...Wind pressure sensor, 6...Outer wall, 6... ...Output part, 7...
...Rotation speed control part, 8...Control hook, 9...Operation selector switch, 10...
・・Automatic operation indicator lamp. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure 4 Figure power supply "゛11 Figure 6 Figure 7 @ 8 Figure / Buto month [me5 insect i:' (rnmtIt+η-1111 9F14 / '! A ref (mv) → 10th factor 1 ／ ／

Claims (1)

[Claims] A blade that allows air to flow along the opening in the room, a blower with a built-in motor, a wind pressure sensor that senses the strength of the outside wind and sends a signal according to that strength, and a signal from the wind pressure sensor. an output part that outputs an output according to the output part, and a rotation speed control part that changes the rotation speed of the motor of the blower according to the output from the output part, and the wind pressure sensor measures the strength of the outside wind. sensing and sending a signal to the output part, and depending on the output from the output part, the rotation speed of the motor of the blower is changed by the rotation speed control part, and the discharge air speed of the blower is adjusted to a wind speed according to the outside wind. A blower device configured to.