JPH112447A - Air shower apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove dust deposited in a recessed part, by securing the amount of a circulation air stream even during an air jet being jetted, blowing off the circulation air stream horizontally also from side air jet injection nozzles together with a longitudinal circulation air stream injected vertically from a blowoff outlet in a ceiling during the air jet injection being interrupted flowing downward to cause a turbulent flow in the recessed part in the air jet. SOLUTION: The present air shower apparatus is adapted such that a damper 11 free to be opened and closed is interposed between a circulation air stream blowoff outlet chamber 2 of a ceiling communicated with circulation air stream formation means 5, and an air jet blowoff chamber 6 located on left and right both sides and communicated with the jet air stream formation means, and when the damper 11 is closed, the circulation air stream blowoff chamber 2 and the air jet blowoff chamber 6 independently separated while when the damper 11 is opened, the circulation air stream blowoff chamber 11 and the air jet blowoff chamber 6 are communicated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air shower device disposed at an entrance of a dust-free work room called a clean room for removing dust and the like adhering to clothes and the like of visitors. is there.

[0002]

2. Description of the Related Art An air shower device that removes dust and the like adhering to clothes and the like of a visitor by a jet air flow jetted from a side wall of an air shower room and a circulating air flow flowing downward from a ceiling portion is conventionally known. is there.

In this type of air heater, the jet airflow generating circuit and the circulating airflow generating circuit are separated and independent so that the amount of the circulating airflow flowing downward from the ceiling is ensured even during the jet airflow injection from the side wall. It has been known. (For example, see Japanese Patent Publication No. 4-50495)

However, when the jet airflow generation circuit and the circulation airflow generation circuit are separated and independent as described above, there is an advantage that a sufficient descending circulating airflow can be obtained even during the injection of the air jet. Since there is only a vertical circulating airflow flowing downward from the ceiling, dust may adhere to and accumulate in the recess of the air jet injection nozzle.

[0005] If dust adheres and accumulates in the concave portion of the air jet injection nozzle, there is a problem that the accumulated dust is scattered or sprayed on the clothes of the entrant or resident at the next air jet injection.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has been made.
During the air jet injection from the side wall, the airflow of the circulating airflow that flows downward from the ceiling is ensured, and when the air jet injection is stopped, the vertical circulation that blows out vertically from the ceiling outlet and flows downward In addition to the airflow, a circulating airflow is also blown out horizontally from the air jet injection nozzle on the side surface to generate turbulence in the recess of the air jet injection nozzle, thereby removing dust accumulated in the recess. It is.

[0007]

Means for Solving the Problems An air shower having a function of generating a circulating airflow blown from an air outlet of a ceiling part of an air shower room and flowing downward in the shower room, and an air jet from jet nozzles on both right and left sides of the shower room. In the device, an openable and closable damper is interposed between a ceiling air circulation chamber that communicates with the circulation airflow forming means and air jet blowing chambers on both left and right sides that communicate with the jet airflow forming means, and the damper is closed. When the damper is opened, the circulating airflow blowing chamber and the air jet blowing chamber are separated from each other, and when the damper is opened, the circulating airflow blowing chamber and the air jet blowing chamber are connected.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of the present invention, FIG. 1 is a longitudinal sectional view of the first embodiment, FIG.
FIG. 3 is a longitudinal sectional view of the second embodiment, and FIG. 4 is an enlarged explanatory view of an air jet ejection nozzle portion.

1 and 2, reference numeral 1 denotes an air shower chamber, and 2 denotes a circulating air flow blowout chamber provided on a ceiling portion of the air shower chamber, which forms a circulating air flow through a HEPA filter 3 and an air supply passage 4. It communicates with the blower 5 which is a means.

Reference numerals 6 and 6 denote air jet blow-out chambers on both the left and right sides of the air shower room 1, which are communicated with each other by a ventilation chamber 7 on the ceiling, and which are jet air flow forming means via a HEPA filter 8. 9
Is in communication with

At least one communication port 10 is provided between the circulating airflow blowing chamber 2 and the air jet blowing chamber 6, and can be opened and closed by a damper 11.

The damper 11 normally hangs down by its own weight to open the communication port 10 as shown in the figure, and communicates the circulating airflow blowing chamber 2 and the air jet blowing chamber 6, but is a jet airflow forming means. When the blowing from the blower 9 is started, it is closed by the increase in the pressure in the air jet blowing chamber 6 and the communication port 10 is closed.
Is closed, and the circulating airflow blowing chamber 2 and the air jet blowing chamber 6 are separated and independent.

The structure of the damper 11 itself may be of a type that is mechanically opened and closed by an increase in pressure as shown in the figure, or a type that is electrically opened and closed by a switch, and any known type can be adopted. In short, it suffices if the communication port 10 is closed when the air is blown from the blower 9 as the jet airflow forming means, and the circulating airflow blowing chamber 2 and the air jet blowing chamber 6 can be separated and independent.

Numeral 12 denotes an air outlet at the lower surface of the circulating air flow blowing chamber 2, and numeral 13 denotes an air jet nozzle which opens from the air jet blowing chambers 6 and 6 to the side of the air shower chamber 1. A convex jet port 13a is accommodated in 1a so as not to protrude into the air shower chamber 1 apparently.

Reference numeral 14 denotes a prefilter attached to the air intake of the air flow forming means which opens at the lower part of the air shower chamber 1.

In the second embodiment shown in FIG. 3, the air jet blowing chambers 6, 6 on the left and right sides of the air shower chamber 1 are connected to blowers 9, 9 as jet air flow forming means, respectively. 1 and FIG. 2 are the same as those of the embodiment shown in FIGS. 1 and 2, and the same parts are denoted by the same reference numerals and description thereof is omitted.

In this embodiment, when the blowers 9, 9 serving as the jet airflow forming means are driven, the clean air sent from the blower 5 serving as the circulating airflow forming means to the circulating airflow blowing chamber 2 as described above. Is also distributed to the air jet blowing chambers 6, 6, so that when the blowers 9, 9 are driven, it is necessary to increase the amount of air blown from the blower 5. Therefore, the blower 5 can change the air volume by controlling the rotation speed of the motor, and can switch between the air jet mode (high rotation) and the circulation flow mode (low rotation).

As described above, when the blower 5 as the circulating airflow forming means is driven, air is taken in from the lower part of the air shower chamber 1 through the pre-filter 14 and is cleaned by the HEPA filter 3 from the air supply passage 4. After being converted into air, the air is supplied to a circulating airflow chamber 2 provided on the ceiling of the air shower chamber 1, and blows out from an air outlet 12 on the lower surface thereof to flow downward in the air shower chamber 1 in a vertical direction. can get.

At this time, since the damper 11 opens the communication port 10 to connect the circulating air flow blowing chamber 2 and the air jet blowing chamber 6, one of the clean air supplied to the circulating air flow blowing chamber 2 is removed. The portion is branched and supplied to the blowing chamber 6 and blown out from the air jet nozzle 13 into the air shower chamber 1 in the horizontal direction.

As shown in FIG. 4, the air jet nozzle 1
The airflow b blown out horizontally from 3 collides with the circulating airflow a flowing vertically downward in the air shower chamber 1,
The turbulent flow c is generated, and the dust accumulated in the concave portion 1a on the side wall of the air shower chamber 1 can be removed and put out on the descending circulating airflow.
Since the air is purified by the EPA filter 3, the inside of the air shower room 1 can be kept clean.

Next, when the blower 9 which is a jet airflow forming means is driven, clean air is sent to the air jet blowing chambers 6 and 6 on the right and left sides of the air shower chamber 1, and the air opening on the side of the air shower chamber 1. Jet nozzle 13
Jets are blown out from the nozzles, and dust adhering to clothes and the like of visitors can be removed.

At this time, the air jet blowing chamber 6,
The damper 11 closes due to an increase in the pressure inside the communication port 6 and the communication port 1
0 is closed and the circulating airflow blowing chamber 2 and the air jet blowing chamber 6 are separated and independent from each other. Therefore, by controlling the amount of air blown from the blower 5 to the circulating airflow blowing chamber 2, A necessary and sufficient air volume can be blown out, and a downward circulating airflow can be ensured even during air jet injection.

[0023]

According to the present invention, a damper which can be opened and closed between a circulating air flow blowing chamber on the ceiling communicating with the circulating air flow forming means and air jet blowing chambers on the left and right sides communicating with the jet air flow forming means. When the damper is closed, the circulating airflow blowing chamber and the air jet blowing chamber are separated and independent,
When the damper is opened, the circulating airflow chamber and the air jet blowing chamber are in communication with each other, so that the circulating airflow flowing downward from the ceiling even during air jet injection from the side wall of the air shower chamber. When the air jet injection is stopped, and in addition to the vertical circulating airflow that blows out vertically from the ceiling outlet and flows downward while the air jet injection is stopped, the air jet injection nozzle on the side By blowing out the circulating airflow to generate turbulence in the concave portion of the air jet injection nozzle, there is an effect that dust accumulated in the concave portion can be removed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a modification of the first embodiment.

FIG. 3 is a longitudinal sectional view showing a second embodiment.

FIG. 4 is an enlarged explanatory view of an air jet ejection nozzle portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air shower room 1a Side wall recessed part 2 Circulating airflow blowing chamber 3 HEPA filter 4 Air supply passage 5 Blower (circulating airflow forming means) 6 Air jet blowing chamber 7 Ventilation chamber 8 HEPA filter 9 Blower (jet airflow forming means) 10 Communication port 11 Damper 12 Circulating air outlet 13 Air jet nozzle 13a Convex outlet 14 Pre-filter

Claims (2)

[Claims] In an air shower apparatus having a function of generating a circulating airflow blown down from a ceiling air outlet of an air shower room and flowing downward in a shower room, and a jet airflow from jet nozzles on both right and left sides of the shower room. When an openable and closable damper is interposed between the circulating airflow blowing chamber on the ceiling communicating with the airflow forming means and the left and right air jet blowing chambers communicating with the jet airflow forming means, and when the damper is closed, The air shower device, wherein the circulating airflow blowing chamber and the air jet blowing chamber are separated and independent from each other, and when the damper is opened, the circulating airflow blowing chamber and the air jet blowing chamber are in a communicating state. . 2. An air shower device having a function of generating a circulating airflow that blows down from a ceiling air outlet of an air shower room and flows downward in a shower room, and a jet airflow from ejection nozzles on both right and left sides of the shower room. A HEPA filter (3) is attached to the blower (5),
Between the ceiling air circulation chamber (2) communicating with the air passage (4) and the air jet chambers (6) on both the left and right sides communicating with the blower (9), which is a jet air flow forming means. When an openable and closable damper (11) is interposed therebetween and the damper (11) is closed, the circulating airflow blowing chamber (2) and the air jet blowing chamber (6) are separated and independent, and the damper (11) is separated. ) Is opened, so that the circulating air flow chamber (2) and the air jet blowing chamber (6) are in communication with each other.