JPH05288384A - Air curtain device - Google Patents

Abstract

PURPOSE:To provide an air curtain device in which energy conservation is performed by always holding high air shielding properties even if an air flow rate out of room is varied and suppressing unnecessary diffusing air volume. CONSTITUTION:The air curtain device comprises a fan box 6 containing a blower 5 to be provided in a building 1 and a diffuser 8 directed down at an upper part of an opening 3 of the building 1 at an end of the box 6. A diffusing direction altering part 9 to be controlled by a diffusing angle controller 10 is provided in the diffuser 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air curtain device for forming a curtain of air jets in the opening of a building with a blower to prevent heat exchange between the inside and outside of the opening or to prevent dust and insects from entering through the opening. ..

[0002]

2. Description of the Related Art Conventionally, an air curtain device of this type is shown in FIG.
The one shown in 1 was general. The configuration will be described below with reference to the drawings. That is, the outlet 10 having a constant outlet angle that communicates with the fan box 102 having the blower 101 for blowing above the opening serving as the inlet and outlet of the building.
3 is provided, and a fixed amount of air is blown from the air outlet 103 downward in a substantially vertical direction, and the inflow of dust and the like is air-shielded by the air flow inside and outside the building.

[0003]

With such a conventional structure, when the external wind speed is high, the blown air shield is broken and cannot serve as an air curtain device. Further, there is a problem that energy is wasted by continuously blowing at a constant airflow even when there is almost no outside wind speed.

The present invention solves the above problems, and provides an air curtain device capable of forming an air shield having sufficient strength in response to changes in the external wind pressure applied to the air shield. The purpose of 1.

A second object is to further increase the strength of the air shield so that it can cope with changes in the external wind pressure applied to the air shield.

A third object is to reduce the power energy for forming the air shield. The fourth purpose is to automatically adjust the strength of the air shield in response to changes in the outside wind pressure.

A fifth object is to grasp the deformation of the air shield and accurately control the air shield to a normal position.

A sixth object is to easily grasp the deformation of the air shield and restore it to its original shape.

A seventh object is to grasp the deformation of the air shield and restore it to its original shape without being affected by the season.

[0010]

In order to achieve the above-mentioned first object, the first means of the air curtain device of the present invention is a fan box having a blower installed in a building,
The fan box is provided with a blowout port which is provided at the end and faces downward above the opening of the building, and the blowout port is provided with a blowout direction varying portion controlled by a blowout angle control means.

In order to achieve the second object, the second means is to provide an upper fan box with a built-in blower installed in the upper part of the building, and an opening of the building at the end of the upper fan box. A blow-out port that faces downward at the upper side, a blow-out direction variable unit that is controlled by a blow-out angle control unit that adjusts the blow-out direction of the blow-out port, and a lower fan box that has a suction port and a blower below the opening. Prepared for the configuration.

In order to achieve the third object, the third means has a structure in which the blowers of the upper fan box and the lower fan box of the second means are provided with an air volume control unit for interlocking the air volume with an inverter. ..

In order to achieve the fourth object, the fourth means is the wind speed measuring means for measuring the wind speed from the outside to the inside of the building in the first means or the second means, and the wind speed measuring means. The measured wind speed value is used as an input signal and used as a control parameter of the blowout angle control unit and the air flow rate control unit of the blower.

In order to achieve the fifth object, the fifth means is a temperature measuring means for measuring the inside and outside temperatures of the building, the outlet temperature of the outlet and the upstream temperature of the suction grill in the second means. The temperature value measured by the temperature measuring means is used as an input signal and used as a control parameter of the blowout angle control section and the air volume control section of the blower.

In order to achieve the sixth object, the sixth means is a second means for measuring the inside and outside temperatures of the building, the outlet temperature of the outlet and the temperature downstream of the suction grill, and temperature measuring means. The temperature value measured by the temperature measuring means is used as an input signal and used as a control parameter of the blowout angle control section and the air volume control section of the blower.

In order to achieve the seventh object, the seventh means is the atmospheric pressure measuring means for measuring the atmospheric pressure difference between the internal and external atmospheric pressure of the building in the first means or the second means, and the atmospheric pressure measuring means measures the atmospheric pressure. The atmospheric pressure value is used as an input signal and is used as a control parameter of the blowout angle control unit and the air volume control unit of the blower.

[0017]

According to the present invention, according to the structure of the first means described above, since the blowout port is provided with the blowout direction changing portion having the blowout angle control means, the air blown from the blowout direction is changed by the blowout direction changing portion according to the outside wind speed. It is possible to keep the air shield normal by changing the blowing angle of the shield.

According to the structure of the second means, since the suction port is provided below corresponding to the upper outlet provided with the outlet direction changing portion having the outlet angle control means, the lower end of the air shield blown out from the outlet is By being sucked in, a strong air shield can be formed which can counter the different external forces that destroy the air shield.

With the configuration of the third means, since the blower is controlled by the inverter, the energy consumed for rotation is proportional to the rotation speed.

With the structure of the fourth means, the value of the external wind speed, which is a major factor for deforming and breaking the air shield, is detected,
Since the blowing direction and the blowing air volume of the air shield are controlled on the basis of this, the operation is simple because the automatic control is performed.

With the configuration of the fifth means, the inside / outside air temperature at the boundary of the air shield that affects the air shield and the upstream temperature of the air outlet and the air inlet of the air shield are detected, and the air outlet angle and the air outlet are detected based on the detected temperature values.・ Because the suction air volume is controlled, the deformation of the air shield can be accurately measured quantitatively.

With the structure of the sixth means, the inside / outside air temperature at the boundary of the air shield that affects the air shield and the downstream temperature of the air outlet and the air inlet of the air shield are detected, and the air outlet angle and the air outlet are detected based on the detected temperature values.・ Since the suction air volume is controlled, the deformation of the air shield can be grasped easily and almost accurately.

With the configuration of the seventh means, the deformation of the air shield is grasped by the difference in the atmospheric pressure inside and outside with the air shield as the boundary, so that the deformation of the air shield can be grasped as a whole by a simple sensor.

[0024]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIG. As shown in the figure, an opening 3 for a doorway is provided up to a floor surface 4 on an outer wall 2 of a building 1.
A fan box 6 containing a centrifugal blower 5 is provided above the inside of the building 1, and a blower outlet 8 is connected to a downstream side of the blower 5 by a duct 7 to have an opening width above the opening 3. Correspondingly fixed to landscape. Further, the air outlet 8 has an air outlet direction changing portion 9, and the air outlet A controller 10 adjusts the air outlet A in a direction parallel to or opposite to the surface of the opening 3 to blow out the air flow A, and an air shield over the entire surface of the opening 3. To form. Further, although details of the blowout angle control device 10 are not shown, there is a blower angle control device 10, for example.

With the above structure, the blowout angle C of the blowout direction varying portion 9 is adjusted according to the strength of the outside airflow B blown from the outside of the opening 3 to optimize the blowout angle of the air flow A at the blowout port 8. To do. That is, when the outside airflow B becomes strong, the air shield can be secured by increasing the blowout angle C of the blowout direction varying portion 9.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to FIG. As shown in the drawing, in the air curtain of the present invention, an opening 3 for a doorway is provided up to a floor surface 4 on an outer wall 2 of a building 1. A fan box 6 containing a centrifugal blower 5 is provided above the inside of the building 1, and a duct 7 is provided downstream of the blower 5 by a duct 7.
Communicate with each other and are fixed to the upper part of the opening 3 in a horizontally long direction corresponding to the opening width toward the floor surface 4. The blowout port 8 has a blowout direction varying unit 9 therein, and a blowout angle control device 10
Is provided so as to be adjusted in a direction parallel to or opposite to the surface of the opening 3 and a suction port 11 corresponding to the blow-out port 8 is provided substantially below the blow-out port 8 on the floor surface 4. A duct 14 communicates with the upstream side of a fan box 13 containing a blower 12 separately provided.
The suction port 11 is covered with the suction grill 11a so as to be even with the floor surface 4 to prevent the trolley from falling.

With the above structure, the airflow A is formed downward from the air outlet A by the blower 5 by the air blower 5 from above the blowout opening 3 to below. Then, the tip of the air shield is sucked by the blower 12 from the suction port 11 of the floor 4.

The external force that destroys the air shield is the external wind pressure of the external air flow B at the opening 3, but the tip of the air shield that weakens toward the tip is sucked from the suction port 11 provided on the floor surface 4 The strength of the shield will be increased to withstand the breaking pressure.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to FIGS. The second
The same parts as those in the embodiment are designated by the same reference numerals and detailed description thereof will be omitted. As shown in the figure, a blower 5 for blowing an air shield, which has an inverter 15 and is capable of controlling the air flow, and the blower 5
A fan box 6 having a blower, a blower outlet 8 having a blower angle control device 10 having a damper motor (not shown),
An air shield suction blower 12 having an inverter 16 and capable of controlling the air volume, and a suction port 11 communicating with a duct 14 on the upstream side of the suction blower 12 are provided.

In the above structure, the blowout angle C of the blowout direction varying portion 9 is adjusted according to the strength of the outside airflow B blown from the outside of the opening 3 to make the blowout direction of the blowout port 8 the optimum blowout angle C. You can Further, the blower blower 5 having the blowout inverter 15 can change the blown air volume according to the change of the outside airflow B. Inverter 1 for blowing
The suction blower 12 having the suction inverter 16 of the blower blower 5 having the number 5 can change the air volume ratio of the blowout and the suction according to the change of the outside airflow B.

Here, what kind of angle is the optimum blowing angle will be explained. As shown in FIG. 4, the airflow A blown from the air outlet 8 is affected by the external airflow B, and then the air intake 1
It is in a state of flowing into 1. The optimum blowing angle C of the air flow A in each outside air flow B was confirmed in the following experiment.

In the winter, when the outlet temperature is 29 ° C. and the outdoor temperature is 20 ° C., the outlet air velocity A of the outlet 8 is 7 m / s, and the ratio of the outlet air amount to the inlet air amount 11 is 1: 1. When a temperature measurement point was provided on the grill 11a and the temperature distribution was examined, the optimum blowing angle C was found. Taking an example, when the outside airflow B has a wind speed of 1.0 m / s, the outlet angle C
5 is changed sequentially to 0 °, 5 °, 10 °, 15 °
The graph as shown in FIG. 5d can be drawn from a. It can be seen that the hot air flows in on average at a blowing angle of 10 ° in this case. Therefore, when the wind velocity of the outside airflow B is 1.0 m / s, the optimum blowing angle C can be determined to be 10 °. Further, when the optimum blowout angle C with respect to the wind speed of each outside airflow B was plotted on a graph, a curve was drawn as shown in FIG. 6, and the relationship between the wind speed of the outside airflow B and the optimum blowout angle C was confirmed.

As described above, according to the air curtain device of the third embodiment, the air shield is not broken even if the wind speed of the outside airflow B changes, and the blown air volume is suppressed when the outside airflow B is low in energy saving operation. Will be able to do.

(Fourth Embodiment) A fourth embodiment of the present invention will be described below with reference to FIG. As shown in the figure,
The controller 17 includes an outdoor wind speed measuring means 18 for measuring the wind speed of the outdoor air flow B, an outlet angle control means 19 for measuring the outlet angle C, an outlet air volume control means 20 for controlling the outlet air volume, and an inlet air volume control means 21 for controlling the inlet air volume. It consists of

To explain the operation with the above configuration, the controller 17 uses the outdoor wind speed sensor 22 to measure the wind speed of the outdoor air flow B by the outdoor wind speed measuring means 18, and grasps the current distribution state of the blown air flow from this measured value. If the air shield is broken, the blowing angle control means 19 instructs the blowing angle control device 10 to change the angle. If the air shield still breaks, the blown air volume control means 20 supplies a rotation speed change signal to the blowing inverter 15 to control the air volume of the blower blower 5. If the air shield still breaks, suction air volume control means 2
Reference numeral 1 supplies a rotation speed change signal to the suction inverter 16 to control the air volume of the suction blower 12.

As described above, according to the air curtain device of the fourth embodiment, the efficient air shield property is always maintained regardless of the change in the wind velocity of the outside air flow B.

(Fifth Embodiment) A fifth embodiment of the present invention will be described below with reference to FIG. As shown in the figure,
The controller 17a includes an indoor temperature measuring means 23 for measuring an indoor temperature, an outdoor temperature measuring means 24 for measuring an outdoor temperature, an outlet temperature measuring means 25 for measuring an outlet temperature, and a grill temperature measuring means 26 for measuring a temperature on a suction grill. And a blowing angle control means 19 for controlling the blowing angle, a blowing air quantity controlling means 20 for controlling the blowing air quantity, and a suction air quantity controlling means 21 for controlling the suction air quantity.

To explain the operation with the above configuration, the controller 17a measures the indoor temperature by the indoor temperature measuring means 23 using the indoor temperature sensor 28, and the outdoor temperature sensor 2
9, the outdoor temperature measuring means 24 measures the outdoor temperature, and the blowing temperature sensor 30 measures the outdoor temperature.
The temperature distribution on the suction grill is measured by the temperature measuring means 26 on the grill using the temperature sensors (31 to 35) on the suction grill, and the current distribution state of the discharge airflow is grasped from these. If the air shield is broken, the blowout angle control means 19 instructs the blowout angle control device 10 to change the angle. If the air shield still breaks, the blown air volume control means 20 supplies a rotation speed change signal to the blowing inverter 15 to control the air volume of the blower blower 5. If the air shield still breaks, the suction air volume control means 21 supplies a rotation speed change signal to the suction inverter 16 to control the air volume of the suction blower 12.

As described above, according to the air curtain device of the fifth embodiment of the present invention, the efficient air shield property is always maintained regardless of the change in the wind velocity of the outside air flow B.

(Sixth Embodiment) A sixth embodiment of the present invention will be described below with reference to FIG. As shown in the figure,
The controller 17b includes an indoor temperature measuring means 23 for measuring an indoor temperature, an outdoor temperature measuring means 24 for measuring an outdoor temperature, an outlet temperature measuring means 25 for measuring an outlet temperature, and an in-duct temperature measuring means 36 for measuring a temperature in a suction duct. And a blowing angle control means 19 for controlling the blowing angle, a blowing air quantity controlling means for controlling the blowing air quantity, and a suction air quantity controlling means 21 for controlling the suction air quantity.

The operation of the air curtain device will be described below. The controller of the air curtain device measures the indoor temperature by the indoor temperature measuring means 23 using the indoor temperature sensor 28 and the outdoor temperature measuring means 24 by the outdoor temperature measuring means 24 using the outdoor temperature sensor 29. The temperature is measured, the outlet temperature is measured by the outlet temperature measuring means 25 using the outlet temperature sensor 30, and the inlet duct temperature measuring means 36 is used by the temperature sensor 38 in the inlet duct.
By measuring the temperature of the air-fuel mixture in the suction duct, grasping the current distribution state of the blowout airflow from these, and if the air shield is broken, the blowout angle control means 19 makes an angle with respect to the blowout angle control device 10. Give instructions to change. If the air shield still breaks, the blown air volume control means 20 supplies a rotation speed change signal to the blowing inverter 15 to control the air volume of the blower blower 5. If the air shield still breaks, the suction air volume control means 21 supplies a rotation speed change signal to the suction inverter 16 to control the air volume of the suction blower 12.

As described above, according to the air curtain device of the sixth embodiment of the present invention, the efficient air shielding property is always maintained regardless of the change in the wind velocity of the outside airflow B.

(Embodiment 7) A seventh embodiment of the present invention will be described below with reference to FIG. As shown in the figure, the controller 17c of the air curtain controls the indoor air pressure measuring means 39 for measuring the indoor air pressure, the outdoor air pressure measuring means 40 for measuring the outdoor air pressure, the blowing angle control means 19 for controlling the blowing angle, and the blowing air volume. It is composed of blown air volume control means 20 and suction air volume control means 21 for controlling the intake air volume.

The operation of the air curtain device will be described below. The controller of the air curtain device measures the indoor air pressure by the indoor air pressure measuring means 39 by using the indoor air pressure sensor 42 and the outdoor air pressure by the outdoor air pressure measuring means 40 by using the outdoor air pressure sensor 43. The air pressure is measured, the current distribution state of the blowout airflow is grasped from these, and if the air shield is broken, the blowout angle control means 19 instructs the blowout angle control device 10 to change the angle. If the air shield still breaks, the blowing air volume control means 20 determines that the blowing inverter 1
A rotation speed change signal is supplied to the blower 5 to control the air volume of the blower blower 5. If the air shield still breaks, the suction air volume control means 21 determines that the suction inverter 16
A rotational speed change signal is supplied to control the air volume of the suction blower 12.

As described above, according to the air curtain device of the seventh embodiment of the present invention, the efficient air shielding property is always maintained regardless of the change in the wind velocity of the outside airflow B.

[0046]

As is apparent from the above embodiments, according to the present invention, even if the wind velocity of the outside airflow changes, the air outlet always faces the optimum blowing direction, and when the wind velocity of the outside airflow is strong. The amount of blown air and the amount of sucked air are increased by automatic control, and the air shield is not broken, and the air curtain can sufficiently fulfill its role. Further, it is possible to provide an air curtain device in which the amount of blown air is suppressed and energy saving operation is possible when the wind speed of the outside airflow is almost zero.

[Brief description of drawings]

FIG. 1 is a sectional view of an air curtain device according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the air curtain device of the second embodiment.

FIG. 3 is a sectional view of an air curtain device according to the third embodiment.

FIG. 4 is an explanatory view of an optimum blowing angle of the air curtain device.

FIG. 5 is an analysis graph of experimental data showing a temperature distribution on the suction grill.

FIG. 6 is an analysis graph of experimental data showing the relationship between the external wind speed and the blowing angle.

FIG. 7 is a block diagram showing a configuration of a controller of the air curtain device according to the fourth embodiment.

FIG. 8 is a block diagram showing a configuration of a controller of the air curtain device of the fifth embodiment.

FIG. 9 is a block diagram showing the configuration of a controller of the air curtain device of the sixth embodiment.

FIG. 10 is a block diagram showing a configuration of a controller of the air curtain device according to the seventh embodiment.

FIG. 11 is a schematic configuration diagram of a conventional air curtain device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Building 3 Opening part 5 Blower 6 Fan box 8 Air outlet 9 Blowing direction variable part 10 Blowing angle control part 11 Suction opening 12 Blower 13 Fan box 15 Inverter 16 Inverter 18 Outdoor wind speed measuring means 19 Blowing angle control means 20 Air volume control means 21 Air Volume Control Means 23 Temperature Measuring Means 24 Temperature Measuring Means 25 Temperature Measuring Means 26 Upstream Temperature Measuring Means 36 Downstream Temperature Measuring Means 39 Atmospheric Pressure Measuring Means 40 Atmospheric Pressure Measuring Means

Claims (7)

[Claims] 1. A fan box provided with a blower in a building, and a blower outlet provided at an end of the fan box and directed downward above an opening of the building. Is an air curtain device provided with a blowing direction variable unit controlled by a blowing angle control unit. 2. An upper fan box having a built-in blower installed in a building, a blower outlet provided at a terminal end of the upper fan box and directed downward above an opening of the building, and an outlet of the blower outlet. A blowout direction variable part controlled by a blowout angle control part for adjusting the blowout direction, a lower fan box having a suction port and a blower below the opening, and an air shield formed between the blowout port and the suction port. Air curtain device. 3. The air curtain device according to claim 2, wherein the blowers of the upper fan box and the lower fan box are provided with an air volume control unit that interlocks with an inverter to control the air volume. 4. A wind speed measuring means for measuring a wind speed from the outer side to the inner side of a building, and a wind speed value measured by the wind speed measuring means as an input signal for controlling a blowing angle control section and an air volume control section of a blower. The air curtain device according to claim 1 or 2, wherein the parameter is the parameter. 5. Temperature measuring means for measuring the inside / outside temperature of a building, the outlet temperature of an outlet, and the temperature upstream of an inlet.
3. The air curtain device according to claim 2, wherein the temperature value measured by the temperature measuring means is used as an input signal to control parameters of the blowout angle control section and the air volume control section of the blower. 6. A temperature measuring means for measuring the inside and outside temperatures of a building, a blowout temperature of an outlet and a temperature downstream of an inlet, and an outlet angle control section using a temperature value measured by the temperature measuring means as an input signal. The air curtain device according to claim 2, wherein the air flow rate controller of the blower and the air flow rate controller use the parameters as control parameters. 7. An atmospheric pressure measuring means for measuring a pressure difference between internal and external atmospheric pressures of a building, and a control parameter of an outlet angle control section and an air volume control section of a blower using the atmospheric pressure value measured by the atmospheric pressure measuring means as an input signal. The air curtain device according to claim 1 or 2.