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Electrodialysis control method and device and water purification equipment

A control method and technology of a control device, which are applied in electrodialysis, separation methods, control/manipulation systems, etc., can solve the problems such as the temperature of the first cup of water cannot be reached, and the ion concentration is increased.

Active Publication Date: 2021-04-02
FOSHAN SHUNDE MIDEA WATER DISPENSER MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the existing water purifiers, the temperature of the first cup of water usually does not meet the user's expected taste, especially the longer the use time, the worse the experience of the first cup of water actually comes out. In the static state of water, due to the osmosis caused by the concentration difference in the concentrated and fresh water chamber of the membrane stack, the ions move from the concentrated water side to the fresh water side, which in turn leads to an increase in the concentration of ions in the fresh water side
When working with water and electricity at the same time, the total dissolved solids value of the first 250ml of water is much higher than the normal water production state, which leads to health problems for users in the first glass of water

Method used

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  • Electrodialysis control method and device and water purification equipment
  • Electrodialysis control method and device and water purification equipment
  • Electrodialysis control method and device and water purification equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Embodiment 1 of the present invention provides an exemplary solution: provide a lower bias voltage to continuously supply pressure during shutdown to make the electrodialysis membrane stack work, so as to solve the problem of excessively high total dissolved solids value in the first cup of water.

[0068] see Figure 4 , Figure 4 It is a flow chart of the electrodialysis control method provided by Embodiment 1 of the present invention. In the embodiment of the present invention, the method to be executed in Embodiment 1 is:

[0069] Step S21: Determine that the electrodialysis membrane stack is in the running state, pass water to the electrodialysis membrane stack and apply a working voltage;

[0070] Step S22: Determine that the electrodialysis membrane stack is in a stopped state, and apply a bias voltage to the electrodialysis membrane stack.

[0071] It can be understood that when the electrodialysis membrane stack is in the running state, the electrodialysis m...

Embodiment 2

[0105] Embodiment 2 of the present invention provides an exemplary solution: do not pass water before each operation, apply a bias voltage to run for a period of time, and then apply water to apply a working voltage, so as to solve the problem that the total dissolved solids value of the first cup of water is too high .

[0106] see Figure 10 , Figure 10 It is a flow chart of the electrodialysis control method provided by the second embodiment of the present invention. In the embodiment of the present invention, the method to be executed in Embodiment 2 is:

[0107] Step S31, confirming that the electrodialysis membrane stack is in the running state, passing water to the electrodialysis membrane stack and applying a working voltage;

[0108] Step S32, determining that the electrodialysis membrane stack is in a shutdown state, wherein water flow to the electrodialysis membrane stack is prohibited in the shutdown state and no operating voltage is applied to the electrodialy...

Embodiment 3

[0141] Embodiment 3 of the present invention provides an exemplary solution: other methods are the same as Embodiment 1 and Embodiment 2, but only pass the water for a preset time after each stop, so as to solve the total dissolved solids value of the first glass of water Too high problem.

[0142] Specifically, the present invention is based on the method provided in Example 2. After the electrodialysis membrane stack is stopped, water is input to the electrodialysis membrane stack with frequent electrode reversal for cleaning, so as to avoid deposition of the membrane stack and can Dilute the high concentrated water to prevent the concentrated water from penetrating into the fresh water area.

[0143] In order to explain this scheme more clearly, it is also explained through a controlled experiment:

[0144] Control group: the total dissolved solids value of the municipal water entering the electrodialysis membrane stack is 500ppm, the working voltage of 20V is applied to t...

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Abstract

The embodiment of the invention provides an electrodialysis control method and device and water purification equipment. The water purification equipment comprises frequent reverse electrodialysis membrane stacks, and a plurality of water inlet channels for water inlet are arranged among the frequent reverse electrodialysis membrane stacks. The control method comprises the following steps: determining that the electrodialysis membrane stacks are in a running state, introducing water into the electrodialysis membrane stacks, and applying working voltage; determining that the electrodialysis membrane stack is in a stop running state, wherein water is forbidden to flow into the electrodialysis membrane stacks and no working voltage is applied to the electrodialysis membrane stacks in the stoprunning state; and during the period that the electrodialysis membrane stacks are recovered to the running state from the stop running state, applying bias voltage of a first duration to the frequentelectrode reversing electrodialysis, water is controlled to flow into the electrodialysis membrane stack, and the bias voltage is increased to the working voltage.

Description

technical field [0001] The invention relates to the technical field of water purification appliances, in particular to a control method, device and water purification equipment for electrodialysis. Background technique [0002] In the existing water purifiers, the temperature of the first cup of water usually does not meet the taste expected by the user, especially the longer the use time, the worse the experience of the first cup of water actually comes out. In the static state of water, due to the osmosis caused by the concentration difference in the concentrated and fresh water chamber of the membrane stack, ions move from the concentrated water side to the fresh water side, which in turn leads to an increase in the concentration of ions in the fresh water side. When working with water and electricity at the same time, the total dissolved solids value of the first 250ml of water is much higher than that of normal water production, which leads to health problems for users ...

Claims

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Application Information

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IPC IPC(8): C02F1/469B01D61/54B01D61/48
CPCC02F1/008C02F1/4695B01D61/54B01D61/48C02F2209/10
Inventor 张艳鹤孙天厚孟繁轲
Owner FOSHAN SHUNDE MIDEA WATER DISPENSER MFG
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