CN210214974U

CN210214974U - Water purifier

Info

Publication number: CN210214974U
Application number: CN201920976980.7U
Authority: CN
Inventors: Shengxue Han; 韩升学; Kuorong Guan; 官阔荣
Original assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Current assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-03-31
Anticipated expiration: 2029-06-26

Abstract

The utility model provides a water purifier, include: a reverse osmosis membrane filter element having a water inlet, a pure water outlet and a wastewater outlet; a booster pump connected to the water inlet; a first flow sensor and a second flow sensor respectively connected to two of the water inlet, the pure water outlet and the wastewater outlet to measure respective water flows; and a control device electrically connected to the booster pump and the first and second flow rate sensors to determine a recovery rate from the measured water flow rate to lower an operating pressure of the booster pump when the recovery rate is lowered. The working pressure before the membrane can be reduced by reducing the working pressure of the booster pump, and the problem of the membrane flow reduction of the reverse osmosis membrane filter element is relieved. Meanwhile, experiments show that the method can improve the recovery rate to a certain extent. In addition, the working pressure of the booster pump is reduced, namely the power of the booster pump is reduced, so that the noise generated by the water purifier can be reduced.

Description

Water purifier

Technical Field

The utility model relates to a waste water recovery's technical field specifically, relates to a purifier.

Background

The reverse osmosis water purifier is a water purifying device commonly used at present, and generates a large amount of waste water while purifying water quality to generate pure water. Therefore, the high recovery rate and low wastewater of the reverse osmosis water purifier are always the development direction of the whole water purification industry.

The booster pump among the current reverse osmosis water purification machine is mostly non-adjustable formula. The working pressure of the booster pump is configured according to parameters such as expected recovery rate, membrane flux of the reverse osmosis water purifier and the like. To achieve high recovery, a booster pump of greater power is typically selected to achieve a higher operating pressure.

However, the working pressure of the booster pump is high, which causes the flow rate of the reverse osmosis membrane filter element to decrease quickly, the waste water ratio is easy to block, the noise of the booster pump is increased, and the cost of the booster pump is relatively high.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that exists among the prior art at least partially, the utility model provides a water purifier includes: a reverse osmosis membrane filter element having a water inlet, a pure water outlet and a wastewater outlet; a booster pump connected to the water inlet; a first flow sensor and a second flow sensor respectively connected to two of the water inlet, the pure water outlet and the wastewater outlet to measure respective water flows; and a control device electrically connected to the booster pump and the first and second flow rate sensors to determine a recovery rate from the measured water flow rate to lower an operating pressure of the booster pump when the recovery rate is lowered.

The working pressure before the membrane can be reduced by reducing the working pressure of the booster pump, and the problem of the membrane flow reduction of the reverse osmosis membrane filter element is relieved. Meanwhile, experiments show that the method can improve the recovery rate to a certain extent. In addition, the working pressure of the booster pump is reduced, namely the power of the booster pump is reduced, so that the noise generated by the water purifier can be reduced.

Illustratively, the first flow sensor is connected to the pure water outlet to measure pure water flow, and the second flow sensor is connected to the wastewater outlet to measure wastewater flow. The recovery rate can be accurately obtained by measuring the flow rate of pure water and the flow rate of wastewater.

Illustratively, the first flow sensor is connected to a pure water port near the water purifier. The working pressure before the membrane can be reduced by reducing the working pressure of the booster pump, and the problem of the membrane flow reduction of the reverse osmosis membrane filter element is relieved. Meanwhile, experiments show that the method can improve the recovery rate to a certain extent. In addition, the working pressure of the booster pump is reduced, namely the power of the booster pump is reduced, so that the noise generated by the water purifier can be reduced.

Illustratively, the second flow sensor is connected to a waste water outlet proximate the water purifier. In this way, the second flow sensor can detect the water flow rate only when the solenoid valve is open. With this arrangement, it is possible to avoid frequent signal transmission to the control device and to avoid malfunction of the control device. In addition, the influence on the structure of the existing water purifier can be reduced.

Exemplarily, further comprising a pressure tank connected to the pure water outlet of the reverse osmosis membrane cartridge, the first flow sensor being connected between the pure water outlet and the pressure tank. The scheme is suitable for families with small water consumption aiming at the small-flux water purifier. The small-flux water purifier may also be producing water in a state where the user is not taking water, and store the produced water in the pressure tank. Therefore, the recovery rate can be accurately determined by disposing the first flow sensor before the pressure tank.

Exemplarily, further comprising a waste water ratio connected to the waste water outlet, the control device being electrically connected to the waste water ratio, the control device controlling the waste water ratio to reduce a waste water flow rate when the recovery rate is reduced. The waste water flow is reduced by controlling the waste water ratio, and the recovery rate can be effectively improved.

Exemplarily, the reverse osmosis membrane filter further comprises a pressure sensor connected between the water inlet of the reverse osmosis membrane filter element and the booster pump and used for detecting the working pressure before the membrane. Therefore, when the working pressure of the booster pump is adjusted and reduced, the normal work of the reverse osmosis membrane filter element cannot be influenced by excessive influence on the working pressure in front of the membrane.

Illustratively, the control device is electrically connected to the pressure sensor to control the pre-membrane operating pressure within a predetermined range when adjusting the operating pressure of the booster pump, thereby ensuring normal, stable operation of the reverse osmosis membrane cartridge.

A series of concepts in a simplified form are introduced in the disclosure, which will be described in further detail in the detailed description section. The summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

The advantages and features of the present invention are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a water path diagram of a high flux water purifier according to an exemplary embodiment of the present invention;

fig. 2 is a water path diagram of a small flux water purifier according to an exemplary embodiment of the present disclosure; and

fig. 3 shows a circuit diagram of a water purifier according to a preferred embodiment of the present invention.

Wherein the figures include the following reference numerals:

100. a water purifier; 110. a reverse osmosis membrane filter element; 120. a pre-filter device; 130. a post-filtration device; 140. a booster pump; 150. a first flow sensor; 152. a faucet; 160. a second flow sensor; 162. an electromagnetic valve; 170. the ratio of waste water to waste water; 180. a pressure sensor; 210. a pressure barrel; 250. a first flow sensor; 300. and a control device.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the present invention. One skilled in the art, however, will understand that the following description illustrates only a preferred embodiment of the invention and that the invention may be practiced without one or more of these details. In addition, some technical features that are well known in the art are not described in detail in order to avoid obscuring the present invention.

The utility model provides a water purifier. As shown in fig. 1, the water purifier 100 includes a reverse osmosis membrane cartridge 110. The reverse osmosis membrane cartridge 110 generates pure water and also generates wastewater in a certain ratio. Accordingly, the reverse osmosis membrane cartridge 110 includes a water inlet a, a pure water outlet B, and a wastewater outlet C.

In order to increase the service life of the reverse osmosis membrane filter element 110, a pre-filter device 120 is usually provided, which is disposed upstream of the reverse osmosis membrane filter element 110. The pre-filter apparatus 120 may include a single filter element or may include a plurality of filter elements. Illustratively, the pre-filter device may include a melt blown (PP) filter element and a precision compressed activated Carbon (CTO) filter element. Optionally, a post-filtration device 130 may be further disposed downstream of the reverse osmosis membrane filter element 110 for adsorbing impurities in water, so as to improve the taste.

The booster pump 140 supplies pressure required for water production to the reverse osmosis membrane filter element 110, and the booster pump 140 is connected to the water inlet a of the reverse osmosis membrane filter element 110. The pressure in front of the reverse osmosis membrane filter element 110 is an important working parameter of the water purifier and is also called the working pressure in front of the membrane.

The water purifier 100 further comprises a first flow sensor and a second flow sensor, both connected to two of the water inlet a, the pure water outlet B and the waste water outlet C, respectively, to measure the respective water flows. Illustratively, as shown in fig. 1, the first flow sensor 150 and the second flow sensor 160 are connected to the pure water outlet B and the wastewater outlet C of the reverse osmosis membrane cartridge 110, respectively. The first flow sensor 150 and the second flow sensor 160 are used to measure the pure water flow rate and the wastewater flow rate, respectively. An intermediate member may be provided between the first flow sensor 150 and the pure water outlet B, and an intermediate member may be provided between the second flow sensor 160 and the wastewater outlet C.

Preferably, the first flow sensor 150 is connected to the pure water outlet near the water purifier, as shown in fig. 1. That is, the first flow sensor 150 is disposed at the most downstream of the pure water line of the water purifier, and the pure water outlet of the water purifier is directly connected to a water intake port at the user, such as a faucet 152. Thus, the first flow sensor 150 is able to detect water flow only when the faucet 152 is open and send a signal of water flow to the control. With this arrangement, it is possible to avoid frequent signal transmission to the control device and to avoid malfunction of the control device. In addition, the influence on the structure of the existing water purifier can be reduced.

However, in the case of a small-flux water purification machine, as shown in fig. 2, a pressure tank 210 is connected to the pure water outlet B of the reverse osmosis membrane cartridge. Preferably, the first flow sensor 250 is connected between the pure water outlet B and the pressure barrel 210. This is because the small-flux water purifier may be producing water in a state where the user does not take water, and store the produced water in the pressure tub 210. The small-flux water purifier shown in fig. 2 is of similar construction to the large-flux water purifier shown in fig. 1, and therefore the same reference numerals are used for the same or similar components, and further description of these same or similar components is omitted.

Preferably, the second flow sensor 160 is connected to the waste water outlet close to the water purifier. Thus, the second flow sensor 160 can detect the water flow rate only when the solenoid valve 162 is opened. With this arrangement, it is possible to avoid frequent signal transmission to the control device and to avoid malfunction of the control device. In addition, the influence on the structure of the existing water purifier can be reduced.

A control device (not shown) is electrically connected to the booster pump 140 and the first and

second flow sensors

150 and 160 to determine a recovery rate from the measured water flow to lower the operating pressure of the booster pump 140 when the recovery rate is lowered. When the use time of the reverse osmosis membrane cartridge 110 is long, the membrane flux of the reverse osmosis membrane cartridge 110 is decreased, resulting in a decrease in recovery rate. The recovery rate is the ratio of pure water flow to raw water flow. The working pressure before the membrane can be reduced by reducing the working pressure of the booster pump 140, and the problem of the membrane flow rate reduction of the reverse osmosis membrane filter element 110 is relieved. Meanwhile, experiments show that the method can improve the recovery rate to a certain extent. In addition, since the operating pressure of the booster pump 140 is reduced, that is, the power of the booster pump 140 is reduced, the noise generated by the water purifier can be reduced.

Fig. 3 shows a circuit diagram of a water purifier according to a preferred embodiment of the present invention. As shown in fig. 3, the control device 300 is electrically connected to the first flow sensor 150 and the second flow sensor 160. The control device 300 receives the water flow rates detected by the first and

second flow sensors

150 and 160 to determine the recovery rate. When the first flow sensor 150 and the second flow sensor 160 measure the pure water flow rate and the wastewater flow rate, respectively, the recovery rate is a ratio of the pure water flow rate to the sum of the downstream water flow rate and the wastewater flow rate. When the first flow sensor 150 and the second flow sensor 160 measure the pure water flow rate and the raw water flow rate, respectively, the recovery rate is a ratio of the pure water flow rate to the raw water flow rate. When the first flow sensor 150 and the second flow sensor 160 measure the flow rate of raw water and the flow rate of wastewater, respectively, the recovery rate is a ratio of a difference between the flow rate of raw water and the flow rate of wastewater to the flow rate of raw water.

The control device 300 is also electrically connected to the booster pump 140, and the control device 300 reduces the operating pressure of the booster pump 140 when the recovery rate is reduced.

The control device 300 may be implemented in the form of at least one hardware of a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), a Programmable Logic Array (PLA), a microprocessor, the control device 300 may be one or a combination of several of a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or other forms of processing units with data processing capability and/or instruction execution capability, and may control other components of the water purifier 100 to perform desired functions.

Referring back to fig. 1, water purifier 100 may also include a wastewater ratio 170 connected to a wastewater outlet C of reverse osmosis membrane cartridge 110. The control device 300 is electrically connected to the waste water ratio 170, as shown in fig. 3. The control device 300 reduces the flow rate of wastewater through the wastewater ratio when the recovery rate decreases. The waste water ratio 170 is a throttling means installed at the waste water outlet C to control the waste water to be discharged in a certain ratio. By reducing the flow rate of the wastewater, the recovery rate of the water purifier 100 can be effectively improved.

Referring to fig. 1 and 3, the water purifier may further include a pressure sensor 180 connected between the water inlet a of the reverse osmosis membrane cartridge 110 and the booster pump 140 for detecting a pre-membrane working pressure. Therefore, when the working pressure of the booster pump is adjusted and reduced, the normal work of the reverse osmosis membrane filter element 110 cannot be influenced by excessive influence on the working pressure before the membrane.

Illustratively, the control device 300 is electrically connected to the pressure sensor 180 to control the pre-membrane operating pressure within a predetermined range when adjusting the operating pressure of the booster pump 140. In general, the pre-membrane working pressure may be any value within the range of 0.6MPa to 0.8 MPa. The pre-membrane operating pressure may fluctuate during operation of the water purifier 100 as long as it remains within the above-described range. The control means 300 is based on the pre-membrane working pressure.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front", "rear", "upper", "lower", "left", "right", "horizontal", "vertical", "horizontal" and "top", "bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner" and "outer" refer to the interior and exterior relative to the contours of the components themselves.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe the spatial relationship of one or more components or features shown in the figures to other components or features. It is to be understood that the spatially relative terms are intended to encompass not only the orientation of the component as depicted in the figures, but also different orientations of the component in use or operation. For example, if an element in the drawings is turned over in its entirety, the articles "over" or "on" other elements or features will include the articles "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". Further, these components or features may also be positioned at various other angles (e.g., rotated 90 degrees or other angles), all of which are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, elements, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A water purifier (100), comprising:

a reverse osmosis membrane cartridge (110) having a water inlet, a pure water outlet, and a wastewater outlet;

a booster pump (140) connected to the water inlet;

a first flow sensor (150) and a second flow sensor (160) connected to two of the water inlet, the pure water outlet, and the wastewater outlet, respectively, to measure respective water flows; and

a control device (300) electrically connected to the booster pump and the first and second flow sensors to determine a recovery rate from the measured water flow to reduce the operating pressure of the booster pump when the recovery rate decreases.

2. The water purifier according to claim 1, wherein the first flow sensor (150) is connected to the pure water outlet for measuring pure water flow and the second flow sensor (160) is connected to the waste water outlet for measuring waste water flow.

3. The water purifier according to claim 2, wherein said first flow sensor (150) is connected to a pure water port close to said water purifier.

4. The water purifier according to claim 2, wherein the second flow sensor (160) is connected to a waste water outlet close to the water purifier.

5. The water purification machine according to claim 2, further comprising a pressure tank (210) connected to the pure water outlet of the reverse osmosis membrane cartridge, the first flow sensor (150) being connected between the pure water outlet and the pressure tank.

6. The water purification machine according to claim 1, further comprising a waste water ratio (170) connected to said waste water outlet, said control device (300) being electrically connected to said waste water ratio, said control device controlling said waste water ratio to reduce the flow of waste water when said recovery rate is reduced.

7. The water purification machine according to claim 1, further comprising a pressure sensor (180) connected between said water inlet of said reverse osmosis membrane cartridge (110) and said booster pump (140) for detecting a pre-membrane working pressure.

8. The water purification machine according to claim 7, wherein said control means (300) is electrically connected to said pressure sensor (180) to control said pre-membrane working pressure within a predetermined range when adjusting the working pressure of said booster pump (140).