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Electrodialysis control method, device and water purifier

A control method and control device technology, applied in the field of water purifiers, devices, and electrodialysis control methods, can solve the problems of the temperature of the first cup of water not reaching, the ion concentration increasing, etc., and achieve the effect of solving the problem of deposition and scaling

Active Publication Date: 2022-07-15
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, device and water purifier
  • Electrodialysis control method, device and water purifier
  • Electrodialysis control method, device and water purifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The first embodiment of the present invention provides an exemplary solution: providing a lower bias voltage to continuously supply the pressure during shutdown to make the electrodialysis membrane stack work, thereby solving the problem that the total dissolved solid value of the first cup of water is too high.

[0067] see Figure 4 , Figure 4 It is a flow chart of the control method of electrodialysis provided by the first embodiment of the present invention. In this embodiment of the present invention, the method to be executed in Embodiment 1 is:

[0068] Step S21: confirming that the electrodialysis membrane stack is in an operating state, passing water to the electrodialysis membrane stack and applying a working voltage;

[0069] Step S22: It is determined that the electrodialysis membrane stack is in a stopped operation state, and a bias voltage is applied to the electrodialysis membrane stack.

[0070] It can be understood that when the electrodialysis memb...

Embodiment 2

[0104] The second embodiment 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 pass water to apply the working voltage, so as to solve the problem that the total dissolved solid value of the first cup of water is too high .

[0105] see Figure 10 , Figure 10 It is a flow chart of the control method of electrodialysis provided by the second embodiment of the present invention. In the embodiment of the present invention, the method to be executed in the second embodiment is:

[0106] Step S31, confirming that the electrodialysis membrane stack is in a 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 stopped operation state, wherein in the stopped operation state, it is forbidden to pass water to the electrodialysis membrane stack and the work...

Embodiment 3

[0140] The third embodiment of the present invention provides an exemplary solution: the other methods are the same as the first and second embodiments, but only the water is passed for a preset time after each stop, so as to solve the total dissolved solid value of the first cup of water. too high problem.

[0141] Specifically, the present invention is described on the basis of the method provided in the second embodiment. After the electrodialysis membrane stack is stopped, water is input to the frequently reversed electrodialysis membrane stack 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 control experiment:

[0143] Control group: the total dissolved solid value of the municipal water fed into the electrodialysis membrane stack was 500 ppm, the worki...

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Abstract

The embodiment of the present invention provides a control method for electrodialysis, which is applied to water purification equipment. The water purification equipment includes a frequently inverted electrodialysis membrane stack. In the out-of-operation state, it is forbidden to pass water to the frequently-reversed electrodialysis membrane stack and no operating voltage is applied to the frequently-reversed-pole electrodialysis membrane stack. A bias voltage is applied to the electrodialysis membrane stack. By applying a bias voltage to the frequently inverted electrodialysis membrane stack during the period from the stop operation to the operation state, the residual water under osmosis is ionized before the water is discharged, so as to solve the problem of the first cup of water in the industry and meet the needs of users. Drinking water health requirements, in addition, by using frequent reversal, the problem of deposition and scaling can also be solved.

Description

technical field [0001] The invention relates to the technical field of water purification appliances, in particular to a control method, device and water purifier 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. The main reason is that the membrane stack used for purification is inoperable. In the standing state of water, ions move from the concentrated water side to the fresh water side due to the osmotic effect caused by the concentration difference in the concentrated fresh water chamber of the membrane stack, which in turn leads to an increase in the ion concentration on the fresh water side. When working with water and electricity at the same time, the total dissolved solid value of the first 250ml of water is much higher than the norm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/54C02F1/469B01D61/48
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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