JP3763650B2 - Air shower equipment - Google Patents

Description

BACKGROUND OF THE INVENTION
The present invention relates to an air shower apparatus that is disposed and used at an entrance / exit of a clean room or the like, and in particular, an air that can be effectively cleaned by a circulating air flow other than when loading / unloading human cargo and a jet air flow performed when entering / leaving the cargo. It relates to a shower device.
[0001]
[Prior art]
The air shower device is for preventing dust or the like adhering to people or luggage from being brought into a clean space such as a clean room. Conventionally, various types of apparatuses have been proposed. For example, as disclosed in Japanese Patent Publication No. 4-50495 (hereinafter, also referred to as Document 1), outside contaminated air enters the room. A circulating airflow coming out from the upper part of the shower room and a jet airflow coming out from the inner wall surface of the shower room so as to blow away dust adhering to people and objects (hereinafter collectively referred to as a person to be purified) Those having a mechanism for generating are known.
[0002]
FIG. 1 is a side cross-sectional view schematically showing a part of the apparatus in order to explain the function of the conventional air shower apparatus disclosed in the above publication. In the following description, in the case where a plurality of components having the same function are provided in the apparatus, only a part thereof may be indicated by a reference numeral.
[0003]
First, a fan (blower) 11 and a filter 13 for generating a circulating airflow A and a fan 15 and a filter 17 for generating left and right jet airflows B are provided, and these are provided independently. When there is no person to be purified in the shower chamber 19, only the circulating airflow A flows, and when the person to be purified is present, the circulating airflow A and the jet airflow B are generated.
[0004]
Here, the two air flow paths when the person to be purified is present in the shower room 19 will be described in detail. First, the circulating air flow A is from the ceiling air outlet 21, and the jet air current B is from the side wall air outlet 23. Each is blown into the same room 19. These two air flows are introduced into the first duct 27 from a lower outlet 25 provided below the shower chamber 19. Here, the jet airflow B is cleaned by the fan 15 through the second duct 29 and the filter 17, and the circulating airflow A is guided from the first duct 27 to the third duct 31 by the fan 11. Later, it is cleaned with a filter 13 and these two air streams are reintroduced into the shower chamber 19.
[0005]
The air shower device includes a fan 11 and a fan 15 so as to share circulation of two air flows by the respective fans. For this reason, it is characterized in that the jet airflow B can be generated without causing a reduction in the air volume of the circulating airflow A. However, there is not much merit by providing these fans individually. Rather, since the number of fans to be used increases, there is a problem that the manufacturing cost is increased and the apparatus is increased in size and power is increased.
[0006]
As a technique that can improve such a problem, the technique disclosed in Japanese Utility Model Publication No. 3-11649 (hereinafter sometimes referred to as Document 2) switches between the circulating airflow A and the jet airflow B, A method of cleaning with a common fan is adopted.
[0007]
FIG. 2 is a diagram showing the apparatus configuration disclosed in Document 2 in the same manner as FIG. Components having the same functions as those of the apparatus configuration shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted. In this apparatus, in order to generate the circulating airflow A and the jet airflow B, the common fan 33 capable of switching the air blowing capability to two stages and the filter 35 for supplying the cleaned airflows A and B are provided. And are provided.
[0008]
First, when there is a person to be purified, the air blowing capacity of the shared fan 33 is operated with a high air volume. At this time, the air flow from the lower outlet 25 is guided to the second duct 39 via the first duct 37. The air flow that has entered the second duct 39 is cleaned by passing through the filter 35 and reaches the third duct 41. Here, the air flow entering the third duct 41 is supplied as the jet air flow B only from the side wall outlet 23 into the shower chamber 19 by the damper 43 that blocks the flow of the air flow with a high air volume. On the other hand, when there is no person to be purified, the damper 43 is opened by operating the shared fan 33 with a low air flow, and the nozzle provided as the side wall outlet 23 is blocked by designing it to a predetermined operating pressure. Is done. Accordingly, an air flow is generated only from the third duct 41 to the fourth duct 45, and the circulating air flow A is introduced into the shower chamber 19 from the ceiling portion outlet 21.
[0009]
As described above, in this air shower device, the damper is opened and closed by switching the blower amount of the fan, and the shower room is cleaned by switching between the circulating air flow and the jet air flow. By such switching, substantially one fan can cope with the circulating air current and the jet air current, thereby reducing the manufacturing cost and making the apparatus compact.
[Problems to be solved by the invention]
[0010]
However, in the air shower device disclosed in Document 2, the air flow in the fourth duct 45 is directly blown into the shower chamber 19 from the ceiling outlet 21. Therefore, in the vicinity of the ceiling portion outlet 21, a strong wind portion and a weak portion are generated in the circulating air flow A, which tends to be turbulent, and a laminar flow for efficiently purifying the inside of the shower chamber 19 can be generated. There was a problem that it was difficult.
[0011]
Moreover, since there is no filter between the ceiling part outlet and the side wall part outlet, when the damper 43 is switched or the apparatus is stopped, dust in the shower chamber 19 is transferred from the ceiling part outlet 21 to the fourth outlet. It flows backward into the duct 45 and flows into the chamber 19 again along the jet airflow B. For this reason, there also existed a problem of reducing the cleanliness in a shower room.
[0012]
The present invention has been made to solve the above-mentioned problems of the prior art, and the circulation air current and the jet air current are supplied by a single fan, and the intrusion of the outside air contaminated by the circulation air current formed as a laminar air flow is provided. An object of the present invention is to provide an air shower apparatus that can prevent the above-described problem and maintain a high cleanliness.
[0013]
[Means for Solving the Problems]
In order to achieve this object, according to the configuration of the air shower device according to the present invention, a circulating airflow blown from the ceiling outlet of the shower room and a jet airflow blown from the side wall outlet of the shower room are generated. In the air shower device for
A shared fan for generating the circulating airflow and the jet airflow described above, and a first duct for supplying an airflow from the lower outlet provided in the shower room to the shared fan;
A first filter for supplying the jet air stream that has been purified from the second duct provided on the downstream side of the common fan to the side wall outlet through the air supply chamber;
A third duct communicating with the second duct described above via a damper;
It is characterized by comprising the second filter for supplying the above-mentioned circulating airflow cleaned from the above-mentioned third duct to the above-mentioned ceiling outlet.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described. The air shower apparatus according to the present invention is configured by allowing a first fan for jet airflow and a second filter for circulating airflow to communicate with one common fan, thereby realizing a compact apparatus configuration, and These two air flows are reliably generated independently. In adopting such a device configuration, as the simplest device configuration, one of the two side wall surfaces constituting the shower room, that is, substantially perpendicular to the passing direction of the person to be purified to the shower room. A side wall outlet for blowing a jet airflow is provided on one of a pair of side wall surfaces opposed in the direction of making a so-called single blow type device.
[0015]
Further, as another embodiment of the present invention, a so-called double-blowing type device can be provided by disposing a side wall outlet on any of the two opposing side wall surfaces. In this case, a compartment is provided at a position opposite to the air supply chamber with the shower chamber interposed therebetween, and a pipe-shaped bypass duct, for example, is provided between the compartment and the air supply chamber. By doing so, a pressure balance is formed between the air supply chamber and the compartment, and it is possible to introduce a jet stream from two directions into the shower chamber only by providing one common fan.
[0016]
【Example】
Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 is an explanatory view similar to FIGS. 1 and 2 for explaining an embodiment of the present invention. Components having the same functions as those in the prior art are denoted by the same reference numerals.
[0017]
In the configuration of the apparatus according to this embodiment, the air in the shower chamber 19 passes through the first duct 37 via the lower outlet 25 by the common fan 33 that can be switched between two levels of high and low. Then, it is guided to the second duct 47.
[0018]
First, when the shared fan 33 is operated at a high air volume, the air flow that has reached the second duct 47 is cleaned by the first filter 49 via the air supply chamber 48, and the side wall outlet 23 is opened. And introduced into the shower chamber 19 as a jet air flow B. During this time, the damper 43 blocks the air flow to the third duct 51. As disclosed in the above-mentioned document 2, the damper 43 may be suitably arranged such as one that opens and closes according to the pressure associated with the air flow, and one that opens and closes by electrical control such as a solenoid valve. I can do it.
[0019]
Further, when the shared fan 33 is operated with a low air flow, the air flow in the second duct 47 described above passes through the side wall outlet 23 designed to have a predetermined operating pressure as in the apparatus described in FIG. It does not flow out from the nozzles that constitute it, and an air flow is introduced into the third duct 51 through the opened damper 43. Therefore, it is cleaned by the second filter 53 disposed in the ceiling portion of the shower chamber 19 separately from the first filter 49 and is circulated as a circulating air flow A in the shower chamber 19 through the ceiling portion outlet 21. be introduced. At this time, since the air flow A passes through the filter and flows into the shower chamber 19, a uniform air volume, that is, a laminar flow is formed in the plane of the filter.
[0020]
Here, as can be understood from the above description and FIG. 3, in the apparatus according to the present embodiment, the third duct corresponding to the fourth duct 45 in FIG. 51 is introduced from the ceiling outlet 21 through the second filter 53. Therefore, a good laminar flow is formed when the shower room is cleaned with a low airflow by the shared fan. Further, in this apparatus, the filter 49 or the filter 53 is provided on the upstream side of the air flow between the ceiling portion outlet 21 and the side wall portion outlet 23. For this reason, even if the circulation airflow A having a relatively low air volume flows backward for some reason, the cleanliness in the shower chamber 19 is not impaired.
[0021]
Although the embodiments of the present invention have been described above, the apparatus of the present invention is not limited to the above-described embodiments. For example, in FIG. 3, as the simplest configuration, the case of a single blow type in which the side wall outlet 23 is provided only on one side of the side wall constituting the shower room is described for one shared fan 33. . However, as shown in FIG. 4 similar to FIG. 3, side wall outlets 23a and 23b are provided on a pair of opposing side walls, respectively, and the air supply chamber 48 and the side wall outlet are opposed thereto. A pipe-shaped bypass duct 55 that communicates with the compartment 57 provided at 23b is provided. By adopting such a configuration, the air supply chamber 48 and the compartment 57 are balanced in pressure by the valve function of the nozzle that constitutes the side wall outlet as already described, and the backflow from the shower chamber 19 can be prevented. A double-blowing device can also be used. These arrangement relations and other specific conditions described above can be suitably designed and modified within the scope of the object of the present invention.
[0022]
【The invention's effect】
As is clear from the above description, according to the configuration of the air shower apparatus of the present invention, the apparatus can be made compact by forming a circulating air current and a jet air current with one common fan, and these 2 Two air streams are fed through filters provided individually. By adopting such a configuration, the circulating airflow is formed as a good laminar flow, and as described above, the cleanliness in the shower room is impaired even when dust flows backward from the ceiling outlet for some reason. There is nothing. Therefore, by applying the apparatus configuration of the present invention, it is possible to provide an air shower apparatus that is compact and can be effectively cleaned.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a conventional technique.
FIG. 2 is an explanatory diagram of another prior art.
FIG. 3 is an explanatory diagram of an embodiment of the present invention.
FIG. 4 is an explanatory diagram of another embodiment according to the present invention.
[Explanation of symbols]
11, 15: Fan, 13, 17, 35: Filter, 19: Shower room,
21: Ceiling part outlet, 23, 23a, 23b: Side wall part outlet,
25: Lower outlet, 27, 37: First duct,
29, 39, 47: second duct 31, 41, 51: third duct,
33: Shared fan, 43: Damper, 45: Fourth duct,
48: Air supply chamber, 49: First filter, 53: Second filter,
55: (pipe-like) bypass duct, 57: compartment, A: circulating airflow,
B: Jet airflow.

Claims (2)

In an air shower device for generating a circulating airflow blown from the ceiling outlet of the shower room and a jet airflow blown from the side wall outlet of the shower room,
A shared fan for generating the circulating airflow and the jet airflow;
A first duct for supplying an air flow from the lower outlet provided in the shower room to the shared fan;
A first filter for supplying the cleaned jet airflow from the second duct provided on the downstream side of the shared fan through the air supply chamber to the side wall outlet;
A third duct communicating with the second duct via a damper;
An air shower device comprising: a second filter for supplying the purified circulating airflow from the third duct to the ceiling outlet. 2. The air according to claim 1, wherein a compartment having a side wall outlet is provided facing the air supply chamber, and a bypass duct is provided between the compartment and the air supply chamber. Shower equipment.

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