CN202117905U

CN202117905U - Water pump frequency-conversion control device with anti-freeze function

Info

Publication number: CN202117905U
Application number: CN2011202041440U
Authority: CN
Inventors: 咸明哲
Original assignee: SHANGHAI CHINA AND SOUTH KOREA DUKE PUMP MANUFACTURING CO LTD
Current assignee: SHANGHAI CHINA AND SOUTH KOREA DUKE PUMP MANUFACTURING CO LTD
Priority date: 2011-06-16
Filing date: 2011-06-16
Publication date: 2012-01-18
Anticipated expiration: 2021-06-16

Abstract

The utility model relates to a water pump frequency-conversion control device with an anti-freeze function, which comprises a frequency converter, a current transformer, a pressure sensor, a temperature sensor and a control device, wherein the frequency converter consists of a three-phase rectifier, a filter capacitor and an inverter. The control device consists of a proportion integration differentiation (PID) controller, an anti-freeze judgment control module, a voltage/frequency (V/F) converter, a pulse width modulation (PWM) controller and a clock controller which are connected in sequence. An input end of the pressure sensor is connected with an input end of the PID controller, a real time clock (RTC) controller, an output end of the temperature sensor are connected with an input end of the anti-freeze judgment control module, and an output end of the PWM controller is connected with a control input end of frequency converter. The water pump frequency-conversion control device with the anti-freeze function has the advantages that the running of a water pump motor under an anti-freeze working condition is controlled by the frequency converter through signals sent by the temperature sensor, an internal clock and the anti-freeze judgment control module, the water pump is prevented from frost crack , and the device is energy-saving and improves safety.

Description

The pump variable frequency control gear that has antifreeze function

Technical field:

The utility model relates to a kind of water supply device, especially relates to a kind of pump variable frequency control gear that has antifreeze function.

Background technique:

In the prior art, winter, the outside method of twining the electric heating wire heating power of water pump and pipe-line system that is employed in usually was incubated in order to prevent the bursting by freezing of water pump and pipe-line system.The deficiency of this method is that water supply system increases extra electricity and protects, and not only electric quantity consumption is big, and aspect system effectiveness property, the reliability and the Security of water supply system bring negative influence.

The model utility content:

The purpose of the utility model provides a kind of pump variable frequency control gear that has antifreeze function energy-conservation, that control automatically to the existing technology deficiency.

The purpose of the utility model is to realize through following measure: a kind of pump variable frequency control gear that has antifreeze function; It comprises the frequency variator of being made up of three-phase rectifier, filter capacitor, inverter; Current transformer, pressure transducer, temperature transducer; It is characterized in that, also include control gear; Said control gear is made up of PID controller, antifreeze judgement control module, V/F transducer, PWM controller, clock controller; PID controller, antifreeze judgement control module, V/F transducer, PWM controller connect successively; Said pressure transducer output termination PID controller input end; RTC clock controller, temperature transducer output terminal are taken over control and are frozen the judge module input end, and the PWM controller output end connects the Frequency Converter Control input end.

Compared with prior art; The pump variable frequency control gear that has antifreeze function that has adopted the utility model to propose has following advantage: the signal that temperature transducer, internal clocking device and the antifreeze judgement control module through special setting provides makes the Frequency Converter Control pump motor under antifreeze operating mode, move; Prevent the water pump bursting by freezing; This device was both energy-conservation, optimized again and improved the variable mode and the utilization efficiency of the VFC of water supply system, and had strengthened reliability, the Security of water supply system.

Description of drawings:

Fig. 1 is an embodiment's of the utility model proposition a control principle skeleton diagram.

Embodiment:

Below in conjunction with accompanying drawing embodiment is elaborated: at the embodiment's of the utility model shown in Figure 1 control principle skeleton diagram.Among the figure, a kind of pump variable frequency control gear that has antifreeze function, it comprises: by the frequency variator that three-phase rectifier 1, filter capacitor 2, inverter 3 are formed, current transformer 4, pressure transducer 11, temperature transducer 10, control gear.Said control gear is made up of PID controller 5, antifreeze judgement control module 6, V/F transducer 7, PWM controller 8, clock controller 9; PID controller 5, antifreeze judgement control module 6, V/F transducer 7, PWM controller 8 connect successively; Said pressure transducer 11 is installed in the water pump pipeline equipped at outlet port; Its output line connects PID controller 5 input ends; Temperature transducer 10 is installed in frequency variator place monitoring of environmental temperature, and RTC clock controller 9, temperature transducer 10 output terminals are taken over control and frozen judge module 6 input ends, PWM controller 8 output termination Frequency Converter Control input ends.

The utility model is work like this: give three-phase rectifier by the power supply input ac voltage, the direct current after the rectification gets into inverter through filter capacitor, and inverter becomes frequency and all variable Ac of voltage to this direct current.The measured pressure signal of pressure transducer by being installed in water pump output oral-lateral is input to PID controller input end, and through PID controller and setup pressure value comparison, the rotating speed that transfers comparative result to control of pump is adjusted the flow of pump outlet.Antifreeze judgement control module receives the current time of the signal of the adjustment pump rotary speed that the PID controller comes and the output of RTC clock controller, the signal of ambient temperature that temperature transducer is exported is judged; Whether pump rotary speed needs adjustment; Output to the V/F transducer if need adjustment then to provide best pump rotary speed signal; Convert tach signal to voltage signal proportional through the V/F transducer again with it; This voltage signal is input to the PWM controller; The PWM controller is input to the Frequency Converter Control input end to signal through pulse width modulating technology, and the inverter of final frequency variator is exported the frequency and the ac voltage water supply pump motor of antifreeze pattern, and pump motor turns round by new instruction.

Combine accompanying drawing to describe the mode of execution of the utility model above; The structure that embodiment provides does not constitute the restriction to the utility model, and those skilled in the art make various distortion within the scope of the appended claims or revise all in protection domain in related domain.

Claims

1. pump variable frequency control gear that has antifreeze function, it comprises the frequency variator of being made up of three-phase rectifier, filter capacitor, inverter, current transformer, pressure transducer, temperature transducer is characterized in that, also includes control gear; Said control gear is made up of PID controller, antifreeze judgement control module, V/F transducer, PWM controller, clock controller; PID controller, antifreeze judgement control module, V/F transducer, PWM controller connect successively; Said pressure transducer output termination PID controller input end; RTC clock controller, temperature transducer output terminal are taken over control and are frozen the judge module input end, and the PWM controller output end connects the Frequency Converter Control input end.