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Method and device for accurately monitoring quantity of water in water tank of solar water heater

A technology for solar water heaters and internal water volume, applied in the direction of displaying liquid level indicators through weight measurement, testing/calibration of weighing equipment, etc., which can solve problems such as high failure rate, increased maintenance costs, and inconvenient use for users

Active Publication Date: 2009-10-21
HONEYWELL (CHINA) CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

Once the water level sensor fails, after-sales engineers have to climb the roof to replace it
Such a high failure rate causes inconvenience for users and increases maintenance costs

Method used

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  • Method and device for accurately monitoring quantity of water in water tank of solar water heater
  • Method and device for accurately monitoring quantity of water in water tank of solar water heater
  • Method and device for accurately monitoring quantity of water in water tank of solar water heater

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Embodiment Construction

[0020] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0021] figure 1 Shown is the water volume monitoring device in the water tank of the solar water heater using a load cell according to the present invention. The water tank has a plurality of gravity support points 7, and a load cell 3 is arranged on one of the gravity support points, which bears part of the weight of the water tank. The load cell 3 converts the weight it bears into a mV-level electrical signal, and provides it to the controller 4 . The controller 4 includes an amplifier, a low-pass filter, an A / D converter and a single-chip microcomputer (microprocessor). In the controller 4, the electrical signal from the load cell 3 is amplified, filtered, A / D converted, and then processed by the single chip microcomputer to obtain a measured value representing the weight of the load cell. Using a single-chip microcomputer to process the electrical...

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Abstract

The invention provides a method for accurately monitoring the quantity of water in a water tank of a solar water heater, including the steps: at least one weighting sensor is used for measuring at least partial weight of the water tank of the solar water heater so as to obtain the measured value of the measured weight; and according to the no-load measured value, the full load measured value and the current measured value of the water tank, the percentage ratio of water quantity of the current water quantity to the maximum water quantity of the water tank is calculated, and the shift of the weighting sensor is periodically and automatically calibrated so that the accurate percentage ratio of the water quantity can be obtained.

Description

technical field [0001] The invention relates to a method and a device for accurately monitoring the water quantity in a water tank of a solar water heater. Background technique [0002] The sensor used to measure the water volume in the solar water heater tank is an important part of the solar water heater. The water volume measurement and control of solar water heaters are inseparable from the sensors that measure water volume. Stable sensors are the guarantee for the intelligent control of the entire solar water heater. [0003] At present, a water level sensor is usually used to measure the position of the water surface in the water tank, which indirectly reflects the water volume in the water tank. There are many kinds of existing water level sensors, such as contact type, float type and so on. These traditional sensors all need to be placed in a water tank and in contact with water. Due to the high temperature in the water tank of the solar water heater (it can be at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/20G01G23/01
Inventor 刘冠军孙文龙高洁
Owner HONEYWELL (CHINA) CO LTD
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