Automatic dynamic water replenishing pressure system

Abstract

The invention discloses an automatic dynamic water replenishing pressure system. A water replenishing pump is connected with a water inlet; the reverse osmosis membrane filter element is connected with a pressure barrel water inlet; the first pressure sensor is connected to a water inlet / outlet pipeline of the pressure barrel; the flow meter is connected to a water outlet of the pressure barrel; the second pressure sensor is connected between the water outlet of the make-up pump and the reverse osmosis membrane filter element; the temperature sensor is connected to a water inlet of the make-up pump; the controller controls the full water pressure of the pressure barrel, the water replenishing pressure of the pressure barrel and the water replenishing action according to the collected flow, pressure and water temperature. Water can be automatically and dynamically supplemented according to the actual condition of a water using end, and the service life of the reverse osmosis membrane can be prolonged while the water quality and the water supply amount are guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of water treatment, and particularly to an automatic dynamic water replenishment pressure system. Background Art

[0002] Inside a water production main unit, there is usually a pressure bucket for storing water to supply water to other terminal devices. Whether the pressure bucket needs water replenishment is only controlled according to the state of a high-pressure switch. Since the state of the high-pressure switch is a switch signal with only two states, namely on and off, and the pressure corresponding to the switching state is fixed, it is impossible to adjust the pressure of different links under different water usage conditions to meet the actual water usage needs of users.

[0003] Due to the uncertainty of the water usage end, when the water consumption is small, because the water replenishment pressure is fixed, the pressure bucket remains full, and the stored water inside cannot circulate sufficiently, which will lead to the problem that the actual water quality is not fresh; when the water replenishment pressure is fixed, but the water transmission distance is far or the height is high, there will be problems such as a decrease in the water supply flow rate or even the inability to supply water; it is impossible to adjust the pressure before the membrane, reducing the service life of the membrane element. Summary of the Invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention part. These simplified concepts are all simplified from the prior art in this field and will be further elaborated in the Detailed Description of the Embodiments part. The Summary of the Invention part of the present invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0005] The technical problem to be solved by the present invention is to provide an automatic dynamic water replenishment pressure system that can automatically and dynamically replenish water according to the actual conditions of the water usage end (water consumption, flow rate, flow), and can extend the service life of the reverse osmosis membrane while ensuring water quality and water supply volume.

[0006] To solve the above technical problem, the automatic dynamic water replenishment pressure system provided by the present invention includes: A water replenishment pump 101, which is connected to the water inlet 201; A reverse osmosis membrane filter element 2 is connected to the water inlet of the pressure bucket 1; A first pressure sensor 11, which is connected to the pipeline of the inlet and outlet of the pressure bucket; A flow meter 12, which is connected to the water outlet 202 of the pressure bucket; A second pressure sensor 13, which is connected between the water outlet of the water replenishment pump 101 and the reverse osmosis membrane filter element 2; A temperature sensor 14, which is connected to the water inlet of the water replenishment pump 101; A controller 121, which performs control on the full water pressure of the pressure bucket 1, the water replenishment pressure of the pressure bucket 1, and the water replenishment action according to the collected flow rate, pressure, and water temperature.

[0007] Preferably, further improve the automatic dynamic water replenishment pressure system. If the detected real-time flow rate is greater than the first specified value, enter the water replenishment state, and increase the full water pressure of the pressure barrel to X, and X is less than the first extreme value; X = [A + (S - 4) / 2] MPa; A is the default full water pressure of the pressure barrel, S is the real-time flow rate, and the first extreme value is the maximum pressure that the pressure barrel can bear.

[0008] Preferably, further improve the automatic dynamic water replenishment pressure system. If the detected real-time flow rate is greater than or equal to the second specified value and less than or equal to the first specified value, adjust the water replenishment pressure; 1) If the pressure difference is less than or equal to the third specified value, increase the full water pressure to the fourth specified value; 2) When the pressure difference is within the first specified range, reduce the water replenishment pressure to the fifth specified value; 3) When the pressure difference is greater than the third specified value, increase the full water pressure to the fourth specified value and reduce the water replenishment pressure to the third specified value.

[0009] The pressure difference = the current pressure of the pressure barrel - the pressure of the pressure barrel Y seconds ago, and the range of Y is 5 seconds to 15 seconds.

[0010] Preferably, further improve the automatic dynamic water replenishment pressure system. If the detected real-time flow rate is less than the second specified value, increase the full water pressure of the pressure barrel to X1, and at the same time increase the water replenishment pressure of the pressure barrel to X2, and both X1 and X2 are less than the first extreme value; X1 = [4 - F / 2] MPa; X2 = [2.5 - F / 4] MPa; F is the real-time flow rate, and the first extreme value is the maximum pressure that the pressure barrel can bear.

[0011] Preferably, further improve the automatic dynamic water replenishment pressure system. If it is detected that the pressure of the pressure barrel continues to decrease and no flow rate is detected, increase the full water pressure of the pressure barrel to the first extreme value and increase the water replenishment pressure of the pressure barrel to the second extreme value, and the second extreme value is a specified value.

[0012] Preferably, further improve the automatic dynamic water replenishment pressure system. If the pressure before the reverse osmosis membrane filter element 2 is greater than the target pressure, adjust the pressure before the reverse osmosis membrane filter element 2 to the target pressure; The target pressure is specified according to the water temperature.

[0013] Preferably, further improve the automatic dynamic water replenishment pressure system. When the water temperature is lower than the first temperature, the target pressure is the first target pressure; When the water temperature is within the second temperature range, the target pressure is the second target pressure, and the second target pressure = [0.5 + (25 - current water temperature) * 0.005] MPa; When the water temperature is greater than the third temperature, the target pressure is the third target pressure.

[0014] Preferably, the automatic dynamic water replenishment pressure system is further improved by periodically calculating the actual deviation value, and the actual deviation value = the pressure before the reverse osmosis membrane filter element 2 - the target pressure; Adjust the rotation speed of the water replenishing pump 101 so that the actual deviation value is within the second specified range.

[0015] The present invention monitors the flow rate through the flow meter at the water outlet end, detects the water temperature through the temperature sensor and the real-time pressure through the pressure sensor, and determines the currently most suitable pressure of the pressure barrel through data calculation by the controller, and controls the water replenishing pump to replenish water to the pressure barrel, making the stored water flow as much as possible to improve the freshness of the water outlet.

[0016] The present invention dynamically increases the upper limit of the water replenishing pressure by detecting the water flow rate, enhances the water supply capacity; according to the pressure data before the reverse osmosis membrane in the filtration system, combined with the water temperature, adjusts the supply voltage of the pump and its rotation speed to keep the pressure before the membrane within the normal range, thereby improving the service life of the membrane element. Brief Description of the Drawings

[0017] The drawings of the present invention are intended to show the general characteristics of the methods, structures, and / or materials used in specific exemplary embodiments of the present invention to supplement the description in the specification. However, the drawings of the present invention are schematic diagrams not drawn to scale, and may not be able to accurately reflect the precise structure or performance characteristics of any given embodiment. The drawings of the present invention should not be construed as limiting or restricting the scope of the numerical values or properties covered by the exemplary embodiments of the present invention. The present invention will be further described in detail below with reference to the drawings and specific embodiments: Figure 1 It is a schematic structural diagram of the present invention.

[0018] Figure 2 It is a signal principle architecture diagram of the present invention.

[0019] Description of the Reference Numerals in the Drawings: Pressure barrel 1 Water replenishing pump 101 Water inlet 201 Controller 121 First pressure sensor 11 Flow meter 12 Second pressure sensor 13 Temperature sensor 14 Reverse osmosis membrane filter element 2 Water outlet 202 of the pressure barrel The concentrated water outlet 203 of the reverse osmosis membrane filter element. Specific embodiments

[0020] The following describes the embodiments of the present invention through specific specific examples. Those skilled in the art can fully understand the other advantages and technical effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments. The details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without departing from the general design concept of the invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. The following exemplary embodiments of the present invention can be implemented in many different forms and should not be construed as being limited only to the specific embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present invention complete and thorough, and to fully convey the technical solutions of these exemplary specific embodiments to those skilled in the art. It should be understood that when an element is referred to as being "connected" or "coupled" to another element, the element can be directly connected or coupled to the other element, or there can be an intermediate element. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there is no intermediate element. In all the drawings, the same reference numerals always represent the same elements. Embodiment

[0021] Reference Figure 1 Combined with Figure 2 As shown, the present invention provides an automatic dynamic water replenishment pressure system, including: A make-up water pump 101, which is connected to the water inlet 201; The reverse osmosis membrane filter element 2 is connected to the water inlet of the pressure barrel 1; A first pressure sensor 11, which is connected to the pipeline of the water inlet and outlet of the pressure barrel; A flow meter 12, which is connected to the water outlet 202 of the pressure barrel; A second pressure sensor 13, which is connected between the water outlet of the make-up water pump 101 and the reverse osmosis membrane filter element 2; A temperature sensor 14, which is connected to the water inlet of the make-up water pump 101; A controller 121, which executes the full water pressure of the pressure barrel 1, the water replenishment pressure of the pressure barrel 1, and the control of the water replenishment action according to the collected flow rate, pressure, and water temperature.

[0022] It should be noted that the collection of the flow rate, pressure, and water temperature can be real-time or periodic. For example, any value from 1 second to 5 seconds can be used as the collection period.

[0023] Correspondingly, the control of the full water pressure of the pressure barrel 1, the water replenishment pressure of the pressure barrel 1, and the water replenishment by the controller can also be real-time or periodic.

[0024] Furthermore, the controller performs the following controls to achieve the control of the full water pressure of the pressure barrel 1, the water replenishing pressure of the pressure barrel 1, and the water replenishing action If it is detected that the real-time flow rate is greater than the first specified value, enter the water replenishing state, and increase the full water pressure of the pressure barrel to X, and X is less than the first extreme value; X = [A + (S - 4) / 2] MPa; A is the default full water pressure of the pressure barrel, S is the real-time flow rate, the first extreme value is the maximum pressure that the pressure barrel can bear, and the first extreme value is selected according to the actual situation of the pressure barrel, such as 4 MPa; The range of the first specified value is 3 L / min to 5 L / min, preferably 4 L / min; If it is detected that the real-time flow rate is greater than or equal to the second specified value and less than or equal to the first specified value, adjust the water replenishing pressure; 1) If the pressure difference is less than or equal to the third specified value, increase the full water pressure to the fourth specified value; 2) When the pressure difference is within the first specified range, reduce the water replenishing pressure to the fifth specified value; 3) When the pressure difference is greater than the third specified value, increase the full water pressure to the fourth specified value and reduce the water replenishing pressure to the third specified value; The range of the second specified value is 1 L / min to 3 L / min, preferably 2 L / min; The range of the third specified value is 0.05 L / min to 1.5 L / min, preferably 0.1 L / min; The range of the fourth specified value is 0.03 L / min to 0.04 L / min, preferably 0.35 L / min; The first specified range is 0.1 MPa - 0.15 MPa; If it is detected that the real-time flow rate is less than the second specified value, increase the full water pressure of the pressure barrel to X1, and at the same time increase the water replenishing pressure of the pressure barrel to X2, and both X1 and X2 are less than the first extreme value; X1 = [4 - F / 2] MPa; X2 = [2.5 - F / 4] MPa; F is the real-time flow rate, and the first extreme value is the maximum pressure that the pressure barrel can bear; If it is detected that the pressure of the pressure barrel continues to decrease and no flow rate is detected, increase the full water pressure of the pressure barrel to the first extreme value and increase the water replenishing pressure of the pressure barrel to the second extreme value. The second extreme value is a specified value, and the second extreme value is selected according to the actual situation of the pressure barrel, such as 2.5 MPa; If it is detected that the pressure before the reverse osmosis membrane filter element 2 is greater than the target pressure, adjust the pressure before the reverse osmosis membrane filter element 2 to the target pressure, and the target pressure is specified according to the water temperature; When the water temperature is lower than the first temperature, the target pressure is the first target pressure, the first temperature is 5°C, the first target pressure range is 0.1 MPa to 1 MPa, preferably 0.6 MPa; When the water temperature is within the second temperature range, the target value pressure is the second target pressure, and the second target pressure = [0.5 + (25 - current water temperature) * 0.005] MPa; the second temperature range is 5°C to 25°C; When the water temperature is higher than the third temperature, the target pressure is the third target pressure, the third temperature range is 25°C to 30°C, the third target pressure range is 0.1 MPa to 1 MPa, preferably 0.5 MPa; Among them, the controller periodically calculates the actual deviation value, and the actual deviation value = the pressure before the reverse osmosis membrane filter element 2 - the target pressure; the period for calculating the actual deviation value can be the same as or different from the period for collecting sensor parameters; preferably, it is the same as the period for collecting sensor parameters; Adjust the voltage of the make-up water pump 101 to control its speed so that the actual deviation value is within the second specified range.

[0025] The second specified range can be specified according to the actually desired control accuracy. Exemplarily, if the second specified range is -5% to 5% of the target pressure, the motor speed remains unchanged; otherwise, the motor speed is changed.

[0026] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will also be understood that terms such as those defined in a general dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly defined herein.

[0027] The present invention has been described in detail above through specific embodiments and examples, but these do not constitute a limitation to the present invention. Without departing from the principle of the present invention, those skilled in the art can also make many modifications and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. An automatic dynamic water replenishment pressure system, characterized in that, Comprising: A make-up water pump (101) connected to the water inlet (201); A reverse osmosis membrane filter element (2) is connected to the water inlet of the pressure tank (1); A first pressure sensor (11) connected to the pipeline of the water inlet and outlet of the pressure tank; A flow meter (12) connected to the water outlet (202) of the pressure tank; A second pressure sensor (13) connected between the water outlet of the make-up water pump (101) and the reverse osmosis membrane filter element (2); A temperature sensor (14) connected to the water inlet of the make-up water pump (101); A controller (121) that executes control of the full water pressure of the pressure tank (1), the make-up water pressure of the pressure tank (1), and the make-up water action according to the collected flow rate, pressure, and water temperature.

2. The automatic dynamic make-up water pressure system according to claim 1, wherein: If it is detected that the real-time flow rate is greater than the first specified value, it enters the make-up water state, and raises the full water pressure of the pressure tank to X, and X is less than the first extreme value; X = [A + (S - 4) / 2] MPa; A is the default full water pressure of the pressure tank, S is the real-time flow velocity, and the first extreme value is the maximum pressure that the pressure tank can bear.

3. The automatic dynamic make-up water pressure system according to claim 1, wherein: If it is detected that the real-time flow rate is greater than or equal to the second specified value and less than or equal to the first specified value, the make-up water pressure is adjusted; 1) If the pressure difference is less than or equal to the third specified value, raise the full water pressure to the fourth specified value; 2) When the pressure difference is within the first specified range, lower the make-up water pressure to the fifth specified value; 3) When the pressure difference is greater than the third specified value, raise the full water pressure to the fourth specified value and lower the make-up water pressure to the third specified value.

4. The automatic dynamic make-up water pressure system according to claim 1, wherein: If it is detected that the real-time flow rate is less than the second specified value, raise the full water pressure of the pressure tank to X1, and at the same time raise the make-up water pressure of the pressure tank to X2, and X1 and X2 are less than the first extreme value; X1 = [4 - F / 2] MPa; X2 = [2.5 - F / 4] MPa; F is the real-time flow rate, and the first extreme value is the maximum pressure that the pressure tank can bear.

5. The automatic dynamic make-up water pressure system according to claim 1, wherein: If it is detected that the pressure of the pressure tank continuously decreases and no flow rate is detected, raise the full water pressure of the pressure tank to the first extreme value, and raise the make-up water pressure of the pressure tank to the second extreme value, and the second extreme value is a specified value.

6. The automatic dynamic make-up water pressure system according to claim 1, wherein: If it is detected that the pressure in front of the reverse osmosis membrane filter element (2) is greater than the target pressure, adjust the pressure in front of the reverse osmosis membrane filter element (2) to the target pressure; The target pressure is specified according to the water temperature.

7. The automatic dynamic make-up water pressure system according to claim 6, wherein: When the water temperature is lower than the first temperature, the target pressure is the first target pressure; When the water temperature is within the second temperature range, the target value pressure is the second target pressure, and the second target pressure = [0.5 + (25 - the current water temperature) * 0.005] MPa; When the water temperature is greater than the third temperature, the target pressure is the third target pressure.

8. The automatic dynamic make-up water pressure system according to claim 7, wherein: Periodically calculate the actual deviation value, and the actual deviation value = the pressure in front of the reverse osmosis membrane filter element - the target pressure; Adjust the speed of the make-up water pump (101) so that the actual deviation value is within the second specified range.

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