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Pump number control method, pump number control device, pump system, heat source system, and recording medium

A control method and heat medium technology, applied in the direction of pump device, pump control, pump, etc., can solve the problem of additional start-up pump

Active Publication Date: 2018-11-13
MITSUBISHI HEAVY IND THERMAL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the determination of the increase or decrease in the number of pumps is performed only by the flow rate measured in this way, there is a possibility that additional pumps will be started even though the capacity of the pump has a margin, that is, the frequency of the pump has a margin compared with the rated frequency. Pump

Method used

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  • Pump number control method, pump number control device, pump system, heat source system, and recording medium
  • Pump number control method, pump number control device, pump system, heat source system, and recording medium
  • Pump number control method, pump number control device, pump system, heat source system, and recording medium

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no. 1 approach

[0041] Below, refer to Figure 1 ~ Figure 3The heat source system of the first embodiment of the present invention will be described.

[0042] figure 1 It is a schematic diagram of the heat source system of 1st Embodiment of this invention.

[0043] Such as figure 1 As shown, the heat source system of this embodiment includes a heat source machine 30 , a primary pump 10 , a secondary pump 20 , a load 40 , a flow meter 21 , and a pump number control device 50 .

[0044] The heat source unit 30 is a device that supplies a cooling or heating heat medium such as water to a load. The primary pump 10 pressure-feeds the heat medium to the heat source machine 30. The heat source unit 30 is a device that supplies a cooling or heating heat medium such as water to a load. In the heat source system of the present embodiment, a plurality of combinations of the heat source machine 30 and the primary pump 10 may be provided in parallel. In the drawing, a state in which a plurality of p...

no. 2 approach

[0117] Below, refer to Figure 6-9 Next, a heat source system according to a second embodiment of the present invention will be described.

[0118] The second embodiment relates to an embodiment for performing more stable pump operation by preventing repetition of increase and decrease in the number of pumps in addition to the first embodiment.

[0119] Figure 6 It is a functional block diagram of the pump number control device of this embodiment.

[0120] The pump number control device 50 of this embodiment differs from the first embodiment in that it includes a pump pressure head acquisition unit 107 . Other configurations of this embodiment are the same as those of the first embodiment.

[0121] The pump pressure head acquisition unit 107 acquires the pump pressure head of the secondary pump 20 currently in operation of the secondary pump 20 and the pump pressure head after the increase or decrease of the secondary pump based on the Q-H characteristic stored in the stor...

no. 3 approach

[0169] Below, refer to Figure 10-11 A heat source system according to a third embodiment of the present invention will be described.

[0170] Like the second embodiment, the third embodiment relates to an embodiment for performing more stable pump operation by preventing repetition of the increase and decrease in the number of pumps in the first embodiment.

[0171] Figure 10 It is a functional block diagram of the pump number control device 50 of this embodiment.

[0172] The pump number control device 50 of this embodiment differs from the first embodiment in that it includes a pump frequency estimated value acquisition unit 108 . Other configurations of this embodiment are the same as those of the first embodiment.

[0173] The pump frequency estimated value acquisition unit 108 acquires the increased pump frequency estimated value and the decreased pump frequency estimated value as the estimated frequency after the increase or decrease in the number of secondary pumps...

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Abstract

The method for controlling the number of pumps of the present invention has the following steps, that is, based on the flow rate of the heat medium pressure-fed to the load (40) by a plurality of pumps connected in parallel or the heat load required by the load, and the flow rate of heat medium to the load (40) from among the plurality of pumps. The frequency command value indicated by each pump in operation is used to increase or decrease the number of operating pumps.

Description

technical field [0001] The invention relates to a method for controlling the number of pumps, a device for controlling the number of pumps, a pump system, a heat source system and a program. [0002] this application claims priority based on Japanese Patent Application No. 2014-017187 for which it applied to Japan on January 31, 2014, and uses the content here. Background technique [0003] In the heat source system that supplies heat medium such as cold water or warm water (hereinafter, cold and hot water) from the heat source machine to load devices such as air conditioners, in addition to the primary pump that pressurizes cold and warm water to the heat source machine, the The air conditioner often installs a plurality of secondary pumps connected in parallel between the heat source unit and the air conditioner for the purpose of pumping the heat medium again. In a heat source system including such a secondary pump, there is a method of determining the number of secondar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/30F24F11/85
CPCF25B25/005F25B49/02F25B2600/13F04B49/02F04B49/065F04B2207/041F24F11/83F04B41/06Y02B30/70F24F11/85F04B49/06
Inventor 大内敏昭二阶堂智松尾实立石浩毅
Owner MITSUBISHI HEAVY IND THERMAL SYST
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