JPH0861886A - Cooling tower - Google Patents

Abstract

PURPOSE: To automatically continue an operation by switching a standby side pump inlet side solenoid switching valve, a circulation lift pipe, and a discharge side solenoid switching valve are connected in series on the way of the pipe in parallel with the projecting area of the lower part of a cooling tower by a pipe. CONSTITUTION: A first inlet side solenoid switching valve 4-1, a first circulation lift pump 3-1, and a first discharge side solenoid switching valve 4-2 are connected in series on the way of the circulation lift pipe 5 of a cooling tower 1. A second inlet side solenoid switching valve 4-3, a second circulation lift pump 3-2 and a second discharge side solenoid switching valve 4-4 are connected in series, and these two lines are connected and piped in parallel with the projection area under the bottom 2 of the tower 1. For example, when the pump 3-1 is defective, the valve 4-4 is switched from closing to opening, the pump 3-2 is turned from OFF to ON, the pump 3-1 is turned from ON to OFF, the valve 4-1 is switched from opening to closing, and the valve 4-2 is automatically controlled from opening to closing, the pump 3-1 is removed, and repaired.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling tower, and more particularly to a cooling tower capable of continuous operation day and night.

[0002]

2. Description of the Related Art Conventionally, it is known that only a pumping circulation pump is installed in the middle of a pumping circulation pipe when pumping circulation of downflow recovered water at the bottom of a cooling tower is carried out to the top of the tower. Further, as shown in the perspective view of FIG. 2, when the downflow recovered water B at the bottom F of the cooling tower A is sprinkled to the upper part of the tower by the pumping circulation pipe G, the inlet side manual opening / closing valve D is provided in the middle of the pumping circulation pipe G. It is also known to install one series in which the pumping circulation pump C and the discharge side manual on-off valve E are connected and connected in series.

When pumping water is circulated as described above, during a daytime when a person who maintains an air conditioner or the like is on standby, a pumping water circulating pump that has failed is replaced and maintained in a relatively short time according to a predetermined procedure. However, in recent years, cooling towers that operate continuously day and night are frequently used, and especially in continuous operation room air conditioning such as computer rooms of buildings and offices where there is no person maintaining the air conditioners at night. If the pumping water circulation pump for the tower fails, there is a problem that the operating efficiency of the computer will decrease due to the rise in the room temperature of the computer room, and it will become impossible to continue operation, and it will be impossible to process important information. . Further, the installation positions of the manual on-off valves D and E and the pumping circulation pump C are outside the cooling tower A (that is,
Since it is outside the projected area of the cooling tower A), there is a problem that the installation space of the cooling tower A becomes large.

[0004]

Means for Solving the Problems The present invention is to solve the above problems, and its gist is to provide a cooling tower for pumping and circulating downflowing recovered water at the bottom to the upper part of the tower, in the middle of a pumping circulation pipe. In addition, two series of series that connected inflow side solenoid on-off valve, pumping circulation pump and discharge side solenoid on-off valve in series,
The cooling tower is characterized in that connecting pipes are connected in parallel within the projected area under the cooling tower.

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention.

【Example】

According to the present invention, as shown in a perspective view in FIG. 1, a first inflow side electromagnetic valve is provided in the middle of a pumping circulation pipe 5 of a cooling tower 1 for pumping and circulating downflow recovered water of a bottom 2 to the upper part of the tower. The on-off valve 4-1, the first pumping water circulation pump 3-1, and the first discharge-side electromagnetic on-off valve 4-2 are connected in series, while the second inflow-side electromagnetic on-off valve 4-3 and the second The pumping water circulation pump 3-2 and the second discharge side electromagnetic on-off valve 4-4 are connected in series, and these two series are connected in parallel within the projected area below the bottom portion 2 of the cooling tower 1. .

In the above invention, the circulation pumps 3-1,
3-2 or the failure of the circulation pump motor is determined by the operation of the overcurrent relay of the pump control circuit unit, but not only this but a signal from the circulation pump motor abnormal temperature detector may be used. , First pumping circulation pump at night 3-
When the failure of No. 1 is detected, the second discharge side solenoid on-off valve 4
-4 from closed to open, second inflow solenoid valve 4-3 from closed to open, second pumping circulation pump 3-2 from OFF to O
To N, turn the first pumping water circulation pump 3-1 from ON to OFF
, The first inflow side electromagnetic on-off valve 4-1 is opened to closed, and the first discharge side electromagnetic on-off valve 4-2 is opened to closed, and the operation is continued by automatic control. The first pumping water circulation pump 3-1 is removed and repaired after the maintenance person goes to work.

[0008]

Since the present invention has the above-mentioned structure, it has the following effects. That is, even if the pump for pumping the cooling tower fails, it can be automatically switched to the pump on the standby side and the room air conditioner can be operated normally, so that important information processing can be performed with confidence. If the on-off valve and the pumping water circulation pump are installed within the projected area of the cooling tower, the installation area of the cooling tower can be reduced.

[Brief description of drawings]

FIG. 1 shows a perspective view of an embodiment of the present invention.

FIG. 2 is a perspective view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooling tower 2 Bottom part 3-1 1st pumping circulation pump 3-2 2nd pumping circulation pump 4-1 1st inflow side solenoid on-off valve 4-2 1st discharge side solenoid on-off valve 4-3 2nd Inflow side solenoid on-off valve 4-4 Second discharge side solenoid on-off valve 5 Pumped water circulation pipe

Claims (1)

[Claims] 1. A cooling tower that pumps and circulates water flowing down at the bottom to the upper part of the tower, in the middle of a pumping circulation pipe,
A cooling tower, characterized in that two series of series in which an inflow side electromagnetic on-off valve, a pumped water circulation pump, and a discharge side electromagnetic on-off valve are connected in series are connected and connected in parallel within a projected area under a cooling tower.