JPH06142435A - Operation of air source device - Google Patents

Abstract

PURPOSE:To prevent the flowing out of dehumidified air to the outside caused by the maloperatin of a valve installed in an inlet of each dehumidifier in an air source device constituted of plural air sources and plural dehumidifiers. CONSTITUTION:An inlet automatic valve 5 is installed in an inlet of each dehumidifier 2. The inlet automatic valve 5 is opened after the dew point of the dehumidifier 2 is sufficiently maintained and is closed before the dehumidifier is stopped or when it is tripped and simultaneously the startup of the air source 1 is performed on condition that the total volume of the dehumidifier 2 during operation is not exceeded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of operating an air source device for dehumidifying air containing moisture to supply it to a plant or the like.

[0002]

2. Description of the Related Art In a conventional air source device for supplying dehumidified air, when a plurality of dehumidifiers are used, one air source 1 and one dehumidifier 2 are paired as shown in FIG. It was often arranged in correspondence with 1. In FIG. 4, reference numeral 3 indicates a check valve for preventing backflow of air.

FIG. 5 shows an example of the construction of an air source device in which the air source 1 and the dehumidifier 2 do not have a one-to-one correspondence. The air from each air source 1 is mixed after passing through the check valve, further dehumidified by a plurality of dehumidifiers 2 arranged in parallel, and supplied to the air-using plant. The inlet manual valve 4 is arranged on the inlet side of each dehumidifier 2, and air that has not been dehumidified or has a poor dew point flows out. Therefore, the opening / closing operation is manually performed corresponding to the start / stop of each dehumidifier. It was

[0004]

In the conventional air source device, when the air source 1 and the dehumidifier 2 shown in FIG. There is a problem that the set cannot be used even if only one of the source 1 and the dehumidifier 2 fails.

On the other hand, in the configuration shown in FIG. 5, even if some of the air sources 1 and some of the dehumidifiers 2 fail at the same time, the remaining air sources 1 and dehumidifiers 2 that have not failed are respectively By operating the required number of units, the operation can be continued without interruption.

However, in the configuration shown in FIG. 5, if the inlet manual valve 4 of the dehumidifier 2 that is stopped is forgotten to be closed, the air that has not been dehumidified flows out through the dehumidifier 2 that is stopped. Problems, undehumidified air continues to flow out from the time the dehumidifier 2 trips until the inlet manual valve 4 is closed. If the inlet manual valve is accidentally opened immediately after the dehumidifier is started, the dew point will be poor. There was a problem that air flowed out. In addition, there is a problem that a necessary dew point cannot be secured if an air source having a capacity exceeding the total capacity of the operating dehumidifier is mistakenly activated.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an operating method of an air source device which solves the above problems.

[0008]

To solve the above problems, according to the present invention, air from a plurality of air sources is mixed and then dehumidified by a plurality of dehumidifiers arranged in parallel and supplied. In the air source device, the inlet automatic valve provided on the upstream side of each dehumidifier is opened after the dehumidifier is activated and a sufficient dew point is secured and closed before the dehumidifier is stopped, and There is provided an operating method of an air source device, characterized in that an air source exceeding the total capacity is not started.

[0009]

According to the above means, after the dehumidifier is activated and a sufficient dew point is secured, the inlet automatic valve is opened to supply dehumidified air. Further, before the dehumidifier is stopped and at the time of trip, the inlet automatic valve is closed to prevent undehumidified air from flowing out of the dehumidifier.
Furthermore, if you try to start an air source that exceeds the total capacity of the dehumidifier that is operating, do not start the air source that exceeds the total capacity of the dehumidifier to secure the dew point, and issue an alarm to call your attention. .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the structure of an air source device. In the figure, the same parts as those shown in FIGS. 4 and 5 are designated by the same reference numerals. In FIG. 1, an inlet automatic valve 5 is provided on the inlet side of each dehumidifier 2.

During operation, as the air source device, the number of air sources 1 according to the required air amount of the plant and the number of dehumidifiers 2 according to the processing capacity are selected. At this time, the automatic inlet valve 5 is related to this. The dehumidifier 2 is fully closed while the dehumidifier 2 is stopped and is fully opened during operation. The operation of the dehumidifier 2 and the automatic inlet valve 5 will be described with reference to the sequence of FIG.

First, when the dehumidifier 2 that is stopped is to be started, the dehumidifier start switch is turned on to start the dehumidifier (steps 10 and 11). If the dehumidifier 2 is, for example, a refrigerating dehumidifier, the necessary dew point cannot be obtained until a sufficient amount of time elapses after being started. Therefore, the time until the dehumidifier 2 starts up and cools down sufficiently (usually 2
For example, a timer for 3 minutes is provided with a margin for about 3 minutes, and the automatic inlet valve 5 is fully opened 3 minutes after the dehumidifier 2 is started (step 12). Alternatively, the dehumidifier 2 may be provided with a dew point detector, and after the necessary dew point is detected, the automatic inlet valve 5 may be fully opened. Next, automatic inlet valve 5
After issuing the opening command to the controller, it is confirmed that the automatic inlet valve 5 is fully opened (step 13). Here, if it does not fully open within 30 seconds after the opening command is issued, it is regarded as an abnormality of the automatic inlet valve 5 and a command to fully close the automatic inlet valve 5 is issued (step 14) to confirm that the valve is fully closed. After that (step 15), the dehumidifier 2 is stopped (step 16) and an alarm is issued (step 17). After it is confirmed at step 13 that the automatic inlet valve 5 is fully opened, the operating state of the dehumidifier 2 is monitored (step 18). If an abnormality occurs in the dehumidifier 2 during operation and a trip occurs (step 19), an alarm is immediately issued and the automatic inlet valve 5 is fully closed (step 20,
21).

Next, when the dehumidifier 2 is stopped, the automatic inlet valve 5 is fully closed (step 23) by a stop command to the dehumidifier 2 (step 22). After confirming that the automatic inlet valve 5 is fully closed (step 24), the dehumidifier 2 is stopped (step 25). If the fully closed state cannot be confirmed even after, for example, 30 seconds have elapsed after issuing the instruction to fully close the automatic inlet valve 5, it is regarded as abnormal and an alarm is issued (step 26). That is, the dehumidifier 2 will not be stopped unless the automatic inlet valve 5 is fully closed. The above sequence is performed for each dehumidifier 2 and each inlet automatic valve 5 associated therewith.

According to the operating method shown in FIG. 2, the automatic inlet valve 5 is opened only after the dehumidifier 2 is activated and a sufficient dew point is ensured, so that undehumidified air does not flow out. . Moreover, since the inlet automatic valve 5 is closed before the dehumidifier 2 is stopped and when the dehumidifier trips, the outflow of undehumidified air is prevented.

Next, a method of operating the air source 1 will be described with reference to the sequence shown in FIG. When the air source 1 is newly activated (step 27), it is determined whether or not the total amount of air increased by activating the air source 1 is less than or equal to the total capacity of the dehumidifier 2 that is currently operating (step 27). Step 28). Here, if the total amount of air is equal to or less than the total capacity of the dehumidifier 2 even if the air source 1 is started, the air source 1
Is permitted (step 29), and when the total air amount of the air source 1 is equal to or larger than the total capacity of the dehumidifier 2, the activation of the air source 1 is not accepted and an alarm is issued to call attention. (Step 30). by this,
The dehumidifier 2 will ensure its dew point, and can prevent the flow of undehumidified air.

[0016]

According to the present invention, in the air source device,
There is no need to manually open or close the dehumidifier inlet valve when starting or stopping the dehumidifier. Immediately after starting the dehumidifier, before opening a sufficient dew point, accidentally open the inlet valve to let air with a poor dew point flow out to the plant, or after stopping the dehumidifier, forget to close the inlet valve to avoid dehumidification It is possible to prevent accidents due to erroneous operation, such as that the air leaks to the plant or the air source that exceeds the total capacity of the dehumidifier is activated, and the necessary dew point cannot be secured.

[Brief description of drawings]

FIG. 1 is a block diagram of an air source device operated in accordance with the present invention.

FIG. 2 is a sequence diagram illustrating a part of a method for operating an air source device according to the present invention.

FIG. 3 is a sequence diagram illustrating a part of a method for operating an air source device according to the present invention.

FIG. 4 is a configuration diagram showing an example of a conventional air source device.

FIG. 5 is a configuration diagram showing another example of a conventional air source device.

[Explanation of symbols]

 1 Air source 2 Dehumidifier 3 Check valve 5 Automatic inlet valve

Claims (1)

[Claims] 1. An air source device in which air from a plurality of air sources is mixed and then dehumidified by a plurality of dehumidifiers provided in parallel and supplied, is provided on the upstream side of each dehumidifier. The automatic inlet valve was opened after the dehumidifier was activated and a sufficient dew point was secured and closed before the dehumidifier was stopped, and the air source for the amount exceeding the total capacity of the operating dehumidifier was not activated. And a method for operating an air source device.