Electrodialysis control method and device and water purifier

A control method and control device technology, applied in the field of water purifiers, electrodialysis control methods, and devices, can solve problems such as the temperature of the first cup of water cannot be reached, and the concentration of ions increases.

Active Publication Date: 2021-04-13
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

Method used

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  • Electrodialysis control method and device and water purifier
  • Electrodialysis control method and device and water purifier
  • Electrodialysis control method and device and water purifier

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0066] 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.

[0067] 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:

[0068] 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;

[0069] Step S22: Determine that the electrodialysis membrane stack is in a stopped state, and apply a bias voltage to the electrodialysis membrane stack.

[0070] It can be understood that when the electrodialysis membrane stack is in the running state, the electrodialysis m...

Embodiment 2

[0104] 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 .

[0105] 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:

[0106] 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;

[0107] 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

[0140] 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.

[0141] 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.

[0142] In order to explain this scheme more clearly, it is also explained through a controlled experiment:

[0143] 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 which is applied to water purification equipment. The water purification equipment comprises a frequent electrodialysis reversal membrane stack. The control method comprises the following steps: determining that the frequent electrodialysis reversal membrane stack is in a stop running state, wherein in an operation stopping state, water is forbidden to flow into the frequent electrodialysis reversal membrane stack, and no working voltage is applied to the frequent electrodialysis reversal membrane stack; and applying bias voltage to the frequent electrodialysis reversal membrane stack during the period that the frequent electrodialysis reversal membrane stack is recovered from the operation stopping state to an operation state. The bias voltage is applied to the frequent electrodialysis reversal membrane stack when the frequent electrodialysis reversal membrane stack is recovered from the operation stopping state to the operation state, so that residual water under the action of permeation is ionized before being discharged, the problem of first cup of water in the industry is solved, the drinking water health requirement of a user is met, and in addition, the problem of deposition and scaling can be solved by adopting frequent electrodialysis reversal.

Description

technical field [0001] The invention relates to the technical field of water purifying appliances, in particular to an electrodialysis control method, device and water purifier. 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 in the first glass o...

Claims

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Application Information

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IPC IPC(8): C02F1/469B01D61/54B01D61/48
CPCC02F1/008C02F1/4695B01D61/54B01D61/48C02F2209/10C02F2307/10
Inventor 张艳鹤孙天厚孟繁轲
Owner FOSHAN SHUNDE MIDEA WATER DISPENSER MFG
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