Pumping device

Abstract

To avoid the suspension of water supply even in the case that there is a spare pump.SOLUTION: In one embodiment of this invention, a pump device has a power source capacity corresponding to the rated electric power of non-spare pumps the number of which excludes spare pumps from an installation number, where the total capacity of the power source capacity and a margin capacity is lower than the rated electric power of the installation number of pumps. The pump device acquires operation information about the pumps in operation. When determining that all non-spare pumps reach the maximum capability on the basis of the operation information, the pump device generates a permission request for the operation of the installation number of pumps. The pump device, into which a permission signal corresponding to the permission request is input, puts the installation number of pumps into parallel operation in the range of a permission time to permit operation using the margin capacity while setting the electric power consumption of the installation number of pumps to be equal to or lower than the total capacity.SELECTED DRAWING: Figure 2

Claims

1. A pump system having a power supply capacity corresponding to the rated power of non-backup pumps (the number of pumps remaining after deducting backup pumps from the total number of installed pumps), and a margin capacity added to the power supply capacity, wherein the total capacity obtained by adding the power supply capacity and the margin capacity is lower than the rated power of the pumps (the number of installed pumps), An acquisition unit that acquires operational information for the pumps currently in operation among the aforementioned number of installed pumps, Based on the aforementioned operating information, if it is determined that all of the non-backup pumps have reached their maximum capacity, a request unit generates a request for permission to operate the aforementioned number of installed pumps. When a permission signal corresponding to the permission request is input, the control unit operates the number of pumps in parallel within a range of permissible time that allows operation using the margin capacity while keeping the power consumption of the installed pumps below the total capacity. A pumping device equipped with the following features.

2. The aforementioned operating information includes the output frequency of the inverter that drives the pump and the amount of water supplied to the pump. The request unit determines that the maximum capacity has been reached when it detects, based on the operating information, either the state in which the output frequency has reached its upper limit or the state in which the water supply amount has reached its maximum water supply amount. The pump device according to claim 1.

3. A notification unit that notifies the management device of the aforementioned permission request, Upon receiving the permission signal from the management device, the receiving unit inputs the received permission signal to the control unit. The pump device according to claim 1 or 2, comprising:

4. The pump device according to claim 3, wherein the control unit performs the parallel operation if the permission signal is not input within a certain period of time from the occurrence of the permission request.

5. The pump device according to claim 1 or 2, wherein the request unit displays and outputs information from a display device prompting the operator to input the permission signal based on the permission request, and inputs the permission signal to the control unit in response to the operator's operation of the input device.

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