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Water temperature control method of instant heating type electromagnetic induction water heater

The technology of electromagnetic induction water heater and water temperature control method is applied in fluid heaters, lighting and heating equipment, etc., which can solve the problems of outlet water temperature fluctuations, burns, and inconvenient use for users, and achieve the effect of precise water temperature control and convenient use

Inactive Publication Date: 2010-09-08
SHANGHAI TIANJIAN ELECTRONICS & MAGNETIC TECHN
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AI Technical Summary

Problems solved by technology

[0002] Most of the water temperature control of instant water heaters currently on the market is to use a temperature sensor to measure the temperature of the water outlet, and then use the PID control principle to control the water temperature. Due to the existence of a certain hysteresis, this method often causes the user to adjust the water volume. When the outlet water temperature fluctuates in a large range, it will cause inconvenience to the user and even cause burns.

Method used

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  • Water temperature control method of instant heating type electromagnetic induction water heater
  • Water temperature control method of instant heating type electromagnetic induction water heater
  • Water temperature control method of instant heating type electromagnetic induction water heater

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Embodiment Construction

[0021] Please refer to the attached image 3 As shown, in the water heater inlet and outlet pipes, a flow meter 1 (workpiece 1), an armored temperature sensor 2 (workpiece 2), and a flow regulating knob 3 (workpiece 3) are arranged.

[0022] Please refer to the attached figure 2 As shown, in the power control circuit, the input is the water inlet temperature measurement signal 4, the water outlet temperature measurement signal 5 and the water flow meter measurement signal 6, which are respectively A / D converted and sent to the microprocessor 7, and the microprocessor 7 Output the control signal to the frequency conversion control module 8, the frequency conversion control module 8 outputs to the power circuit IGBT drive module 9, drives the power tube IGBT output current, the current output by the power tube IGBT makes the electromagnetic heating coil 10 heat, and the current in the electromagnetic heating coil 10 After being sampled 12, it is sent to the power feedback cont...

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Abstract

The invention provides a water temperature control method of an instant heating type electromagnetic induction water heater. The method is that a flow sensor and a temperature sensor are arranged in a water heater water supply pipe to separately detect the flow velocity of water and the water inlet temperature and water outlet temperature of the pipe, a microprocessor CPU is used to process the obtained data, the CPU calculates the desired power for the set water temperature, the output power of a power output circuit is controlled to provide for an electromagnetic heating coil; and the temperature of water in the pipe is maintained to an advance control mode. The invention has the advantages that compared with the traditional PID control method, the control method of the invention adopts not postponing control but advance control and the desired control power is accurately calculated at the water inlet. Therefore, water temperature control is accurate and fast without causing incidents and the method of the invention is convenient for the user to adopt.

Description

technical field [0001] The invention relates to a method for precisely controlling the water temperature of a civil or commercial instantaneous electromagnetic induction water heater, and can also be applied to indoor heating systems for heating water flow and the like. Background technique [0002] Most of the water temperature control of instant water heaters currently on the market is to use a temperature sensor to measure the temperature of the water outlet, and then use the PID control principle to control the water temperature. Due to the existence of a certain hysteresis, this method often causes the user to adjust the water volume. Sometimes, the temperature of the outlet water fluctuates in a large range, which will cause inconvenience to the user, and even cause burns. Contents of the invention [0003] The present invention provides a new water temperature control method for an instant electromagnetic induction water heater, the steps of which are: [0004] Ste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24H9/20
Inventor 陈飞华小龙
Owner SHANGHAI TIANJIAN ELECTRONICS & MAGNETIC TECHN
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