Water purifier
By adding a return pipeline at the pure water outlet of the RO filter element of the pure water machine and using an intelligent controller to automatically return the flow, the problem of high TDS of the first cup of water of the large-throughput RO machine is solved, and the water quality improvement and energy consumption optimization are achieved.
Patent Information
- Application Number
- CN202421537779.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-01
AI Technical Summary
The first cup of water in the large-throughput RO machine has a high TDS, resulting in poor quality of drinking water.
A pure water machine is designed. By adding a second pipeline to the pure water outlet of the RO filter element and setting a return solenoid valve on the inlet pipeline. When the machine standby time exceeds the preset time, the water inlet solenoid valve, booster pump and return solenoid valve work simultaneously, and the TDS high water in the RO filter element is returned to the inlet pipeline and re-filtered through the RO filter element.
It effectively reduces the TDS value of the first cup of water, ensures the safety and quality of drinking water, while avoiding water waste and reducing energy consumption.
Smart Images
Figure CN222821310U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of water treatment technology and relates to a pure water machine to solve the problem that the TDS of the first cup of water of a large-flux RO machine is too high. Background Art
[0002] Nowadays, water pollution is becoming more and more serious, and the problem of urban water safety has become prominent. In order to solve the problem of secondary pollution of tap water and harmful substances in tap water caused by raw water pollution, more and more water purifiers are being used. At present, the main method for household filtration and purification is RO reverse osmosis water purifier. Municipal tap water is treated by coarse filtration system and RO reverse osmosis filtration to obtain water that can be directly drunk. TDS is the abbreviation of total dissolved solids, also known as total dissolved solids. TDS refers to the total amount of all solutes in water, including the content of both inorganic and organic matter. The higher the TDS value, the more dissolved substances are contained in the water. The high or low TDS value affects the quality of water. When the TDS value is too high, it is easy to endanger the health of people who drink it.
[0003] Large-flux RO machines are generally machines with a capacity of more than 400G, without a pressure tank. The water circuit diagram is as follows: Figure 1 As shown, the water production process is as follows: tap water passes through the water inlet three-way ball valve 10, flows through the composite filter element 1, the low-pressure switch 4, the water inlet solenoid valve 5 and the booster pump 6 to increase the water inlet pressure, and the high-pressure water enters the RO filter element 2. The concentrated water is discharged from the wastewater drainage pipeline 13 through the combined solenoid valve 14, and the pure water flows out through the post-filter element 3, the check valve 7, the high-pressure switch 8, and then to the water outlet faucet 12. When the machine is on standby for more than 1 hour, the wastewater with high TDS value in the RO filter element 2 will penetrate into the pure water, resulting in the TDS value of the pure water part being almost the same as that of the wastewater. In this way, when the machine is started, the TDS of the first cup of pure water released is quite large, so the problem of too high TDS of the first cup of water needs to be solved.
[0004] After investigation, the existing patent number is CN202320252694.2 Chinese patent "A new device for solving the problem of too high TDS in the first cup of pure water", including a water inlet pipe, a solenoid valve, a water storage barrel, a flow interceptor, a connecting pipe and a fixed pipe. The water inlet pipe is fixedly connected to the membrane filter element, and the membrane filter element is provided with a pure water outlet and a waste water outlet. At the same time, the pure water outlet is connected to a check valve through a pipeline, and the check valve is connected to a pressure switch through a pipeline, and a drinking water pipe is provided on the pressure switch. The device is provided with a pressure switch. When the pressure switch detects a drop in the pressure in the pipeline, it can trigger the operation of the solenoid valve, and then the water in the pipeline between the pure water outlet and the check valve is discharged from the fixed pipe through the solenoid valve, avoiding the discharge of purified water with too high TDS content from the drinking water pipe through the check valve. However, if the pressure switch is used for detection, if the pipeline pressure is low in the standby state, the solenoid valve will be triggered to work continuously. Although it can solve the problem of too high TDS in the first cup of water, the design is not reasonable enough, the energy consumption is large, and there is a lot of water waste. Summary of the invention
[0005] The technical problem to be solved by the utility model is to provide a pure water machine with simpler and more reasonable structure, low energy consumption, safe and healthy drinking water in view of the above technical status quo, which effectively solves the problem of high TDS of the first cup of water of a large-flux RO machine.
[0006] The technical solution adopted by the utility model to solve the above technical problems is: a pure water machine, including a filtering system, a booster pump and a water inlet solenoid valve, the filtering system includes a composite filter element, an RO filter element and a post-filter element, the water inlet of the composite filter element is connected to the tap water pipe through a water inlet three-way ball valve, the water outlet of the composite filter element is connected to the water inlet of the RO filter element through an inlet pipeline, the booster pump and the water inlet solenoid valve are arranged on the inlet pipeline, the concentrated water outlet of the RO filter element is connected to the wastewater drainage pipeline through a combined solenoid valve, and is characterized in that: the pure water outlet of the RO filter element is connected to two pipelines, wherein the first pipeline is connected to the water inlet of the post-filter element, and the water outlet of the post-filter element is connected to the water outlet faucet through a check valve and a high-pressure switch The second pipeline is connected to the water inlet pipeline through a reflux solenoid valve, a raw water TDS probe and a pure water TDS probe are arranged at the raw water end and the pure water end, at least the execution signal output ends of the controller are respectively connected to the water inlet solenoid valve, the reflux solenoid valve, the combination solenoid valve and the booster pump, and the detection signal input ends of the controller are respectively connected to the raw water TDS probe and the pure water TDS probe. When the machine is on standby for more than the preset standby time, the water inlet battery valve, the booster pump and the reflux solenoid valve work at the same time, and the water with high TDS in the RO filter element is refluxed to the water inlet pipeline through the second pipeline, and re-filtered by the RO filter element. When the desalination rate is detected to be higher than the preset parameter, the water inlet battery valve, the booster pump and the reflux solenoid valve stop working.
[0007] Furthermore, the raw water TDS probe is arranged on the water inlet pipeline, between the composite filter element and the RO filter element.
[0008] Furthermore, the pure water TDS probe is arranged on the first pipeline of the RO filter element and between the RO filter element and the post-filter element.
[0009] Furthermore, the display signal output terminal of the controller is connected to a display screen, and each control signal input terminal of the controller is connected to a touch button, a high voltage switch, and a low voltage switch.
[0010] Finally, the water purifier has a chassis, which has a front plate, a rear plate, a top plate, a bottom plate and side plates. A filter element holder is arranged in the chassis, and two filter element chambers are horizontally distributed above and below the filter element holder. The RO filter element is installed in the upper chamber, and the composite filter element is installed in the lower chamber. In addition, the upper hole and the lower hole of the front plate are connected at the front end of each chamber through their own end covers, and a rear filter element chamber is arranged in the rear plate, and the rear filter element is installed, which is equipped with a detachable cover plate. The bottom plate is below the filter element holder, and a booster pump is installed. The circuit board of the controller is fixed on the lower inner side of the front plate.
[0011] Compared with the prior art, the utility model has the advantages that: a second pipeline is added to the pure water outlet of the RO filter element, and the second pipeline is connected to the water inlet pipeline through a reflux electromagnetic valve. When the machine is on standby for more than the preset standby time, the water inlet electromagnetic valve, the booster pump and the reflux electromagnetic valve work at the same time, and the water with high TDS in the RO membrane is discharged and refluxed to the water inlet pipeline, and re-filtered through the RO filter element to avoid water waste. The working time of the water inlet electromagnetic valve, the booster pump and the reflux electromagnetic valve is determined according to the detected desalination rate, which can avoid energy waste due to too long working time and high TDS water cannot be completely discharged due to too short working time; an intelligent controller is provided, which can automatically control the opening and closing of each electrical component to ensure that the water with high TDS is re-filtered after reflux. The structural design of the utility model is simpler and more reasonable. It only needs to automatically reflux the water with high TDS and re-filter it according to the set standby time and desalination rate, which effectively solves the problem of too high TDS in the first cup of water, and at the same time avoids water waste and ensures drinking safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 To improve the water circuit schematic diagram of the previous water purifier;
[0013] Figure 2 It is a schematic diagram of the waterway of an embodiment of the utility model;
[0014] Figure 3 The electrical schematic diagram of the intelligent controller of the embodiment of the utility model;
[0015] Figure 4This is a process flow chart of an embodiment of the utility model;
[0016] Figure 5 This is one of the structural diagrams of an embodiment of the utility model;
[0017] Figure 6 This is the second structural diagram of the embodiment of the utility model; DETAILED DESCRIPTION
[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0019] like Figures 2 to 6 As shown, a pure water machine includes a filtration system, a booster pump 6, a water inlet solenoid valve 5, a check valve 7, a low-pressure switch 4 and a high-pressure switch 8. The filtration system includes a composite filter element 1, an RO filter element 2 and a post-filter element 3. The water inlet of the composite filter element 1 is connected to a tap water pipe 11 through a water inlet three-way ball valve 10. The water outlet of the composite filter element 1 is connected to the water inlet of the RO filter element 2 through the water inlet solenoid valve 5 and the booster pump 6 on the water inlet pipeline B. The pure water outlet of the RO filter element 2 is connected to two pipelines, wherein the first pipeline C is connected to the water inlet of the post-filter element 3, and the water outlet of the post-filter element 3 is connected to the water outlet faucet 12 through the check valve 7 and the high-pressure switch 8. The second pipeline The concentrating water outlet of the RO filter element 2 is connected to the wastewater drainage pipeline 13 through the combined solenoid valve 9. A raw water TDS probe a and a pure water TDS probe b are provided at the raw water end and the pure water end. When the machine is on standby for more than a preset standby time, such as 1h, the inlet battery valve 5, the booster pump 6 and the reflux solenoid valve 14 work simultaneously, and the water with high TDS in the RO filter element 2 is refluxed to the inlet pipe B through the second pipe D, and re-filtered through the RO filter element 2. When the desalination rate is detected to be higher than the preset parameter, such as 90%, the inlet battery valve 5, the booster pump 6 and the reflux solenoid valve 14 stop working, and the machine is in standby state.
[0020] The raw water TDS probe a is arranged on the water inlet pipeline B, between the composite filter element 1 and the RO filter element 2, and the pure water TDS probe b is arranged on the first pipeline C of the RO filter element 2, between the RO filter element 2 and the post-filter element 3.
[0021] The pure water machine also includes an intelligent controller A, a display screen 15 and a touch switch 16. The execution signal output ends of the intelligent controller A are respectively connected to the water inlet solenoid valve 5, the reflux solenoid valve 14, the combination solenoid valve 9 and the booster pump 6. The detection signal input ends of the intelligent controller A are respectively connected to the raw water TDS probe a and the pure water TDS probe b. The display signal output end of the intelligent controller is connected to the display screen 15. The control signal input ends of the intelligent controller are connected to the touch button 16, the high pressure switch 8 and the low pressure switch 4, so that the intelligent controller A is used to control the operation of each solenoid valve and the booster pump 6, receive the detection signals of the raw water TDS probe a, the pure water TDS probe b, the low pressure switch 4 and the high pressure switch 8, so that the display screen 15 displays the status and data, and inputs various instructions and signals of the high pressure switch 8 and the low pressure switch 4 through the touch switch 16, such as Figure 3 As shown, the intelligent controller A is connected to an external power source via a power adapter 17 .
[0022] When the machine is on standby for more than 1 hour, the water inlet battery valve 5, the booster pump 6 and the reflux solenoid valve 14 automatically work simultaneously under the control of the intelligent controller A. The water with high TDS in the RO filter element 2 flows back from the second pipeline D to the water inlet pipeline B through the reflux solenoid valve 14, and then enters the RO filter element 2 for re-filtration. When the desalination rate is detected to be higher than 90%, the water inlet battery valve 5, the booster pump 6 and the reflux solenoid valve 14 are closed, and the machine is in standby mode.
[0023] The formula for calculating the desalination rate is: Desalination rate = (raw water TDS value - pure water TDS value) / raw water TDS value
[0024] The mechanical structure of the entire pure water machine adopts a chassis 20, which has a front plate 21, a rear plate 22, a top plate 23, a bottom plate 24 and its side plates 25. A filter element holder 26 is arranged in the chassis 20. The filter element holder 26 has two filter element chambers horizontally distributed above and below. The upper chamber 27 is installed with an RO filter element, and the lower chamber 28 is installed with a composite filter element. In addition, the upper hole 21a and the lower hole 21b of the front plate 21 are connected at the front end of each chamber through their own end covers. A rear filter element chamber 29 is arranged at the rear plate 24, and a rear filter element is installed, which is equipped with a detachable cover plate, so that it is convenient for users to replace the filter element. A booster pump is installed on the chassis bottom plate 24 below the filter element holder 26, and a circuit board 210 of the intelligent controller A is fixed on the lower inner side of the front plate 21 to prevent the circuit board from being damaged by water contamination.
[0025] Here’s how it works:
[0026] The tap water in the water pipe 11 passes through the water inlet three-way ball valve 10, flows through the composite filter element 1, and the low-pressure switch 4, the water inlet solenoid valve 5 and the booster pump 6 work to increase the water inlet pressure. The high-pressure water enters the RO filter element 2 for filtration. The concentrated water produced after filtration is discharged through the combined solenoid valve 9 through the wastewater drainage pipeline 13. The pure water is divided into two routes: the first pipeline C passes through the post-filter element 3, the check valve 7, and the high-pressure switch 8, and flows out from the water outlet faucet 12; the second pipeline D is connected to the water inlet pipeline B through the reflux solenoid valve 14 Then, when the machine is on standby for more than 1 hour, the water inlet battery valve 5, the booster pump 6 and the reflux solenoid valve 14 work simultaneously, and the water with high TDS in the RO filter element 2 is refluxed from the second pipeline D to the water inlet pipeline B through the reflux solenoid valve 14, and then enters the RO filter element 2 for re-filtration. The working time of the water inlet battery valve 5, the booster pump 6 and the reflux solenoid valve 14 is determined according to the detected desalination rate. When the desalination rate is detected to be higher than 90%, the water inlet battery valve 5, the booster pump 6 and the reflux solenoid valve 14 are closed.
[0027] The utility model has a more reasonable structural design and does not need to set up a pressure switch detection. It only needs to detect the standby time and desalination rate to automatically return the water with high TDS for re-filtration, thus solving the problem of too high TDS of the first cup of water, avoiding water waste and ensuring drinking safety.
[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.
Claims
1. A water purifier, comprising a filtration system, a booster pump and a water inlet solenoid valve, wherein the filtration system comprises a composite filter element, an RO filter element and a post-filter element, wherein the water inlet of the composite filter element is connected to the tap water pipe through a water inlet three-way ball valve, the water outlet of the composite filter element is connected to the water inlet of the RO filter element through a water inlet pipeline, the booster pump and the water inlet solenoid valve are arranged on the water inlet pipeline, and the concentrated water outlet of the RO filter element is connected to the wastewater drainage pipeline through a combined solenoid valve, characterized in that: The pure water outlet of the RO filter element is connected to two pipelines, wherein the first pipeline is connected to the water inlet of the post-filter element, the water outlet of the post-filter element is connected to the water outlet faucet through a check valve and a high-pressure switch, the second pipeline is connected to the water inlet pipeline through a reflux solenoid valve, a raw water TDS probe and a pure water TDS probe are provided at the raw water end and the pure water end, at least the execution signal output ends of each circuit of the controller are respectively connected to the water inlet solenoid valve, the reflux solenoid valve, the combination solenoid valve, and the booster pump, and the detection signal input ends of each circuit of the controller are respectively connected to the raw water TDS probe and the pure water TDS probe. When the machine is on standby for more than a preset standby time, the water inlet battery valve, the booster pump and the reflux solenoid valve work simultaneously, and the water with high TDS in the RO filter element is refluxed to the water inlet pipeline through the second pipeline, and re-filtered by the RO filter element. When the desalination rate is detected to be higher than the preset parameter, the water inlet battery valve, the booster pump and the reflux solenoid valve stop working.
2. The water purifier according to claim 1, characterized in that: The raw water TDS probe is arranged on the water inlet pipeline and between the composite filter element and the RO filter element.
3. The water purifier according to claim 1, characterized in that: The pure water TDS probe is arranged on the first pipeline of the RO filter element and is located between the RO filter element and the post-filter element.
4. The water purifier according to claim 1, characterized in that: The display signal output end of the controller is connected to the display screen, and each control signal input end of the controller is connected to a touch button, a high voltage switch and a low voltage switch.
5. The water purifier according to claim 1, characterized in that: The water purifier has a chassis, which has a front plate, a rear plate, a top plate, a bottom plate and side plates. A filter element holder is arranged in the chassis, and two filter element chambers are horizontally distributed above and below the filter element holder. The RO filter element is installed in the upper chamber, and the composite filter element is installed in the lower chamber. In addition, the upper hole and the lower hole of the front plate are connected at the front end of each chamber through their own end covers, and a rear filter element chamber is arranged in the rear plate, and the rear filter element is installed, and a detachable cover plate is provided. The bottom plate is below the filter element holder, and a booster pump is installed. The circuit board of the controller is fixed on the lower inner side of the front plate.