CN222729508U - Water purifier - Google Patents

Abstract

The application provides a water purifier which is provided with a raw water inlet, a hot water outlet and a water outlet, and comprises a booster pump, a filtering device, a hot water pipeline and a heater. The water inlet of the booster pump is communicated to the raw water inlet. The filtering device comprises a raw water port and a purified water outlet. The water outlet of the booster pump is communicated with the raw water port of the filtering device. The hot water pipeline is communicated between a water purifying outlet and a water intake of the filtering device, and a water suction pump is arranged on the hot water pipeline. The heater is used for heating water in the hot water pipe, wherein the booster pump is configured to perform a closing operation in response to a stop hot water taking operation by a user, and the water suction pump is configured to be turned off after the booster pump performs the closing operation. The booster pump is continuously operated when the user takes hot water, and the water in the filtering device has high water pressure. Therefore, the water suction pump on the hot water pipeline can be turned off after the booster pump performs the turning-off operation. Therefore, the pressure in the filtering device can be released, and water in the pipeline is prevented from leaking out through the water intake under the action of the pressure.

Description

Water purifier

Technical Field

The utility model relates to the technical field of water treatment, in particular to a water purifier.

Background

The reverse osmosis membrane filter element is a process for separating water molecules from solutes from a water body by using the selective permeability that a selective membrane can only permeate water but not permeate the solutes by taking the pressure higher than osmotic pressure as a driving force. In order to achieve the pressure required by reverse osmosis, a water purifier adopting a reverse osmosis membrane filter element often needs to be provided with a booster pump for boosting. The pore size of the reverse osmosis membrane is very small, so that dissolved salts, colloids, microorganisms, organic matters and the like in water can be effectively removed. In addition, the reverse osmosis membrane filter core can directly discharge filtered impurities in the form of concentrated water.

Many of the reverse osmosis water purifiers commonly available in the market are equipped with a heating function, and the water purifier is usually connected with an intelligent faucet for displaying water temperature. The user can select hot water and normal-temperature water on the intelligent faucet, and the temperature of the hot water can be set. The water purifier equipped with the intelligent tap can comprise a water pump and a heating body. The water pump can adjust the water flow delivered to the heating body, thereby adjusting the water pressure delivered to the intelligent faucet. After stopping taking water, both the booster pump and the suction pump are turned off, so that the supply of water to the intelligent tap can be stopped.

However, the user feedback is that the water intake is continuously leaking out after the water purifier is used to take hot water. Thus, not only water resources are wasted, but also objects around the water purifier can be influenced by the outflow of high-temperature water. Water leakage may also lead to scalding of the user.

Disclosure of utility model

In order to solve the problems of the prior art at least in part, the present utility model provides a water purifier having a raw water inlet, a hot water outlet, and a drain outlet, the water purifier including a booster pump, a filtering device, a hot water pipe, and a heater. The water inlet of the booster pump is communicated to the raw water inlet. The filtering device comprises a raw water port and a purified water outlet. The water outlet of the booster pump is communicated with the raw water port of the filtering device. The hot water pipeline is communicated between a water purifying outlet and a water intake of the filtering device, and a water suction pump is arranged on the hot water pipeline. The heater is used for heating water in the hot water pipe, wherein the booster pump is configured to perform a closing operation in response to a stop hot water taking operation by a user, and the water suction pump is configured to be turned off after the booster pump performs the closing operation.

Since the booster pump is continuously operated when the user takes hot water, the water in the filtering device may have a high water pressure. This water pressure is not released immediately after the booster pump stops operating. Therefore, the accumulated pressure can be slowly released through the hot water pipeline, and water leakage is caused at the water intake of the water purifier. The inventor proposes a new design that allows the water pump on the hot water line to be set to shut off after the booster pump performs a shut-off operation. That is, the suction pump is turned off after a delay time after the booster pump stops working, thereby releasing the pressure in the filter device and preventing the residual water in the pipeline from slowly and continuously leaking out through the water intake under the action of the pressure. In addition, the filter device and the hot water pipeline are prevented from storing high-pressure water all the time after the user finishes taking hot water, and the service life of the water purifier is prolonged.

The water purifier further includes a controller electrically connected to the booster pump and the suction pump. The controller is used for controlling the water suction pump to be turned off after a first preset time period after the booster pump executes the turning-off operation. The controller can accurately control the time of delay closing of the water pump, so that when the water pump stops working, the pressure in the filtering device can be just released until the water intake is not leaked.

Illustratively, the water purifier further comprises a flow meter for detecting a flow of water in the hot water line, and a controller. The controller is electrically connected to the flow meter, the booster pump and the suction pump. The controller is used for controlling the water suction pump to be closed after the booster pump executes the closing operation and when the water flow is smaller than a preset flow threshold. The preset flow threshold may be a flow rate of the suction pump when the non-pressurized water is drawn. When the flow detected by the flowmeter is smaller than the preset flow threshold, the water pump can be indicated to completely release the water pressure of the filtering device. At this time, the controller controls the water suction pump to be closed, so that a better leakage-proof effect is realized.

Illustratively, the filter device further comprises a water concentrate port, and the water purifier further comprises a water concentrate solenoid valve, the water concentrate solenoid valve being in communication between the water concentrate port and the water concentrate port. The controller is also used for controlling the concentrated water valve to be opened for a second preset time period and then closed when the booster pump executes the closing operation. After the concentrated water valve is opened, the pressure accumulated in the filter device (especially the pressure before the membrane) can be rapidly discharged. It is possible to prevent the accumulated pressure from causing the concentrated water to slowly flow out of the waste water ratio valve, and to generate continuous noise for a long period of time.

Illustratively, the water purifier further includes a water inlet solenoid valve, which is connected between the booster pump and the raw water inlet. The controller is also used for controlling the water inlet electromagnetic valve to be closed in response to stopping the hot water taking operation. Since the raw water inlet can be connected with municipal tap water, the municipal tap water has a certain pressure. When the filter device adopts a filter element such as a reverse osmosis filter element or a nanofiltration filter element, since such a filter element has a concentrated water outlet, tap water passes through the booster pump and is discharged from the concentrated water outlet of the filter device even when the booster pump is turned off. The controller can control the water inlet electromagnetic valve to be closed when the booster pump stops working, so that the water source is cut off. The arrangement can avoid the waste of resources caused by the outflow of raw water from the water outlet when the water purifier does not work.

Illustratively, the flow rate of the pump is adjustable, and the controller is further configured to adjust the flow rate of the pump based on the target hot water temperature entered by the user. The water purifier also comprises a return pipeline, a water inlet of the return pipeline is communicated with an inlet of the hot water pipeline, an outlet of the return pipeline is communicated with an inlet of the booster pump, and a check valve is arranged on the return pipeline. When the water flow at the purified water outlet of the filtering device is larger than the water flow pumped by the flow control pump, the redundant purified water is returned to the upstream of the booster pump to participate in water production again. The pipelines and waterway elements on the pipelines can be protected by releasing redundant purified water, so that the service life is prolonged.

The water purifier may further include a controller electrically connected to the water pump and the heater. The controller is used for controlling the heater and the water pump to be turned off simultaneously after the booster pump performs the turning-off operation. The controller controls the heater and the water pump to be closed simultaneously, so that the temperature of hot water flowing out of the water intake can still reach the requirement of a user, and even if the booster pump stops working, the hot water flows out of the water intake. And the heater is prevented from continuously heating the water after the water in the hot water pipeline stops flowing, so that high-temperature steam is generated, even dry heating is generated, and the hot water pipeline and components positioned on the hot water pipeline are damaged.

Illustratively, the water purifier further includes a smart faucet coupled to the water intake. The intelligent tap can accurately control the water yield, avoid unnecessary waste and improve the water utilization efficiency. The intelligent tap can also reduce the times of hands contacting the tap through the induction technology, thereby avoiding the spread of bacterial toxin and being more sanitary and convenient. In addition, in the water purifier with the water heating function, the number of times that hands contact the faucet is reduced, and the risk of scalding by hot water can be reduced.

The water purifier further includes a normal temperature water pipe connected between the water purifying outlet and the water intake of the filter device, the normal temperature water pipe being provided with a water outlet solenoid valve configured to be closed in response to a stop of the normal temperature water taking operation by a user. The normal-temperature water pipeline directly utilizes the pressure in the filtering device to convey normal-temperature water to the water intake, and the waterway is simpler and more efficient, and meanwhile, the energy is saved. The water outlet electromagnetic valve can be closed when the booster pump stops working. After the user is prevented from taking normal-temperature water, the water continuously leaks from the water intake because the pressure is also arranged in the filtering device.

Illustratively, the hot water line is further provided with a zero pressure valve upstream of the suction pump. When the inflow pressure of the water pump fluctuates, the accuracy of controlling the flow rate may be reduced, and when the heater is an instant heater, the temperature of the hot water heated by the heater may be unstable. Therefore, the zero-pressure valve arranged at the upstream of the water suction pump can provide stable water inlet pressure for the water suction pump, so that the water flow flowing through the heater can be accurately controlled, and the temperature of hot water at the water intake is stable.

In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description section. This summary 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.

Advantages and features of the utility model are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings are included to provide an understanding of the utility model and are incorporated in and constitute a part of this specification. Embodiments of the present utility model and their description are shown in the drawings to explain the principles of the utility model. In the drawings of which there are shown,

Fig. 1 illustrates a waterway diagram of a water purifier according to an exemplary embodiment of the present application;

Wherein the above figures include the following reference numerals:

100. 101, a raw water inlet, 102, a water intake, 103, a water outlet, 1041, a hot water pipeline, 1042, a normal temperature water pipeline, 105, a waste water pipeline, 106, a return pipeline, 110, a booster pump, 120, a filtering device, 121, a raw water inlet, 122, a purified water outlet, 123, a concentrated water outlet, 130, a check valve, 140, a concentrated water valve, 150, a water inlet electromagnetic valve, 160, a water outlet electromagnetic valve, 170, a zero pressure valve, 180, a flowmeter, 210, a water pump, 220 and a heater.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the utility model. However, it will be understood by those skilled in the art that the following description illustrates preferred embodiments of the utility model by way of example only and that the utility model may be practiced without one or more of these details. Furthermore, some technical features that are known in the art have not been described in detail in order to avoid obscuring the utility model.

To at least partially solve the above problems, according to an embodiment of the present utility model, a water purifier 100 is provided. As shown in fig. 1, the water purifier 100 has a raw water inlet 101 and a water intake 102, and the raw water inlet 101 may obtain raw water from a municipal water supply or other suitable water source. The water purifier 100 may further include a booster pump 110. The inlet water of the booster pump 110 is connected to the raw water inlet 101, and can boost the raw water. The water purifier 100 may further include a filtering device 120, and the filtering device 120 includes a raw water port 121 and a purified water outlet 122. The raw water port 121 of the filter device 120 is connected to the water outlet of the booster pump 110, and the purified water outlet 122 of the filter device 120 is connected to the water intake 102. Illustratively, the filter device 120 may include, for example, one or more of a reverse osmosis filter element and a nanofiltration filter element.

Illustratively, the water purifier 100 may be provided with a hot water line 1041. The hot water line 1041 communicates between the clean water outlet 122 of the filter device 120 and the intake port 102. The hot water pipe 1041 is provided with a heater 220, and the heater 220 is used for heating water in the hot water pipe 1041. Illustratively, the heater 220 may employ one or more of a resistive heater, a carbon fiber heater, a quartz tube heater, a ceramic heater, a thick film heater, and the like.

Illustratively, the booster pump 110 is configured to perform a shut-down operation in response to a user stopping a hot water taking operation. For example, the water purifier 100 may be provided with a water taking stop button, and when a user clicks the water taking stop button after taking a desired amount of hot water, the booster pump 110 stops operating. However, since the booster pump 110 is continuously operated when the user takes hot water, the water in the filtering device 120 may have a high water pressure. This water pressure is not released immediately after the booster pump 110 stops operating. This causes the accumulated pressure to be slowly released through the hot water pipe 1041, thereby causing water leakage from the water intake 102 of the water purifier 100. The inventors propose a new design that allows the water pump 210 on the hot water line 1041 to be set to be turned off after the booster pump 110 performs the turning-off operation. That is, the suction pump 210 is turned off after a delay after the booster pump 110 is stopped, thereby releasing the pressure in the filter 120, and preventing the residual water in the pipe from slowly and continuously leaking out through the water intake 102 by the pressure. In addition, the filter 120 and the hot water pipe 1041 are prevented from always storing high pressure water after the user finishes taking hot water, and the service life of the water purifier 100 is prolonged. For example, a mechanical delay device or a capacitive discharge delay device may be provided to control the water pump 210 to be turned off in a delayed manner after the booster pump 110 is turned off.

Illustratively, the water purifier 100 may further include a controller. The controller can be built by adopting electronic elements such as a timer, a comparator, a register, a digital logic circuit and the like, or can be realized by adopting processor chips such as a singlechip, a microprocessor, a Programmable Logic Controller (PLC), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), a Programmable Logic Array (PLA), an Application Specific Integrated Circuit (ASIC) and the like and peripheral circuits thereof. The controller may be electrically connected to the booster pump 110 and the suction pump 210. The controller is configured to control the water pump 210 to be turned off after a first preset period of time after the booster pump 110 performs the turn-off operation. The time of the delay of the water pump 210 being turned off can be precisely controlled by the controller, so that the pressure in the filter 120 can be just released to the point that the water intake 102 is no longer leaking when the water pump 210 stops working.

In addition to the time of delayed shut-down of the water pump 210 by time control, the time of delayed shut-down of the water pump 210 may alternatively be controlled by counting the flow. Illustratively, the water purifier 100 may further include a flow meter 180. The flow meter 180 may comprise any suitable flow meter, such as a differential pressure flow meter, a rotameter, or an electromagnetic flow meter. The flow meter 180 is used to detect the flow of water in the hot water line 1041. The controller is electrically connected to the flow meter 180, the booster pump 110 and the water pump 210, and is configured to control the water pump 210 to be turned off after the booster pump 110 performs a turn-off operation and when the water flow rate is less than a preset flow rate threshold. For example, the preset flow threshold may be a flow rate of the suction pump 210 when the non-pressurized water is drawn. When the flow rate detected by the flow meter 180 is less than the preset flow rate threshold, it may be indicated that the water pump 210 has completely released the water pressure of the filtering device 120. At this time, the controller controls the water pump 210 to be turned off, so that a better leakage-proof effect is achieved. Illustratively, the controller may also control the heating power of the heater 220 according to the flow information in the hot water pipe 1041 detected by the flow meter 180, and thus control the temperature of the hot water produced by the heater 220.

Illustratively, in any embodiment that includes a controller, the controller may be electrically connected to the water pump 210 and the heater 220. The controller is used to control the heater 220 and the suction pump 210 to be simultaneously turned off after the booster pump 110 performs the turn-off operation. The controller controls the heater 220 and the water pump 210 to be turned off at the same time, so that the temperature of the hot water flowing out of the water intake 102 by the user can still meet the requirement of the user, and even if the booster pump 110 stops working, the hot water flows out of the water intake 102. And also prevents the heater 220 from continuously heating the water after the water in the hot water pipe 1041 stops flowing, generating high temperature steam and even generating dry heating, and damaging the hot water pipe 1041 and components located on the hot water pipe 1041. Preferably, when the flow rate detected by the flow meter 180 becomes smaller, the power reduction of the heater 220 may be synchronously controlled, thereby achieving the purpose of precisely controlling the temperature of the hot water at the water intake 102.

Illustratively, when the filter apparatus 120 employs a reverse osmosis cartridge, the filter apparatus 120 may further include a concentrate outlet 123. For this purpose, the water purifier 100 may be further provided with a waste water pipe 105 connected between the concentrate outlet 123 and the drain outlet 103. The waste water line 105 may be provided with a concentrated water valve 140. The concentrated water generated by the filtering device 120 may be discharged to the outside of the water purifier 100 through the water discharge port 103. The waste water line 105 may also be provided with a waste water ratio valve. The waste water ratio valve can enable the filter device 120 to generate concentrated water in a certain proportion in the process of preparing purified water, so that the pressure in the filter device 120 can be maintained to ensure normal water preparation, and impurities in raw water can be timely discharged through the waste water ratio valve, so that the service life of the filter device 120 is prolonged. Illustratively, the waste ratio valve may be connected in parallel with the concentrate water valve 140, and the waste ratio valve and concentrate water valve 140 may also be integrated together to form a waste combination valve. For example, the spool of the concentrate solenoid valve 140 or any other suitable location may be provided with a water passage that forms a waste ratio valve. When the valve core of the concentrated water electromagnetic valve 140 is opened, the waste water can pass through the concentrated water electromagnetic valve 140 at a larger flow rate, and when the valve core of the concentrated water electromagnetic valve 140 is closed, the waste water can only be discharged through the water passing hole, so that the flow rate of the waste water is limited. The integrated wastewater is more compact and reliable than the valve and concentrate water valve 140.

The controller may also be used to control the concentrated water valve 140 to be opened and then closed after a second preset period of time when the booster pump 110 performs a closing operation, for example. After the concentrated water valve 140 is opened, the pressure accumulated in the filter device 120 (particularly, the pre-membrane pressure) can be rapidly discharged. By opening the concentrated water valve 140 after the water purifier 100 finishes filtering water, that is, after the booster pump 110 stops operating, it is possible to prevent the concentrated water from slowly flowing out of the waste water ratio valve due to the accumulated pressure, and to generate continuous noise for a long time. Illustratively, the concentrate solenoid valve 140 may be a normally closed solenoid valve that opens in an energized state, allowing a large flow of water to pass. The concentrated water valve 140 continuously consumes electric power in an opened state and the coil generates heat. To extend the life of the concentrated water solenoid valve 140 and the circuit controlling the opening thereof while reducing the power consumption, the controller may start timing when the concentrated water solenoid valve 140 is opened and control the concentrated water solenoid valve 140 to be closed when the accumulated time reaches a second preset time period. The second preset time period may be reasonably set according to actual needs, for example, according to the conditions of the filter 120 and the booster pump 110 of the water purifier 100. To ensure that the concentrate is emptied, the concentrate solenoid valve 140 may be opened for 3-5 seconds. In other words, the above second preset period of time may be set to 3-5 seconds. After that, the concentrated water solenoid valve 140 is closed, and electric energy is not continuously consumed or heat is generated, so that the service life of the concentrated water solenoid valve 140 and a circuit for controlling the opening of the concentrated water solenoid valve is prolonged.

The controller may also be used to control the opening of the concentrate valve 140 when the booster pump 110 is in operation, for example. For example, after the water purifier 100 is operated for a long time, the filter device 120 needs to be rinsed, the concentrated water valve 140 may be opened, and at this time, the booster pump 110 may start to operate, and raw water may pass through the filter device 120 at a large flow rate and be discharged from the opened concentrated water valve 140. The large flow of raw water can remove impurities deposited on the filter 120, thereby prolonging the service life of the filter 120.

Illustratively, referring to fig. 1, the water purifier 100 may further include a water inlet solenoid valve 150, the water inlet solenoid valve 150 communicating between the water inlet of the booster pump 110 and the raw water inlet 101. The controller is also configured to control the closing of the water intake solenoid valve 150 in response to stopping the water taking operation. The water inlet solenoid valve 150 is connected in series between the raw water inlet 101 and the filtering device 120. As described above, since the raw water inlet 101 can be connected to the municipal tap water, the municipal tap water has a certain pressure. When the filter device 120 employs a filter cartridge such as a reverse osmosis filter cartridge or a nanofiltration filter cartridge, since such a filter cartridge has the concentrate outlet 123, tap water passes through the booster pump 110 and is discharged from the concentrate outlet 123 of the filter device 120 even when the booster pump 110 is turned off. The controller may control the water inlet solenoid valve 150 to close when the booster pump 110 stops operating, thereby shutting off the water supply. This arrangement can prevent the raw water from flowing out of the water outlet 103 and wasting resources when the water purifier 100 is not in operation.

Illustratively, the water purifier 100 may also include a smart faucet coupled to the water intake 102. The intelligent tap can accurately control the water yield, avoid unnecessary waste and improve the water utilization efficiency. The intelligent tap can also reduce the times of hands contacting the tap through the induction technology, thereby avoiding the spread of bacterial toxin and being more sanitary and convenient. In addition, in the water purifier 100 having the function of heating water, reducing the number of times the hand contacts the tap can also reduce the risk of scalding with hot water.

Illustratively, referring to fig. 1, the water purifier 100 may further include a normal temperature water pipe 1042 communicating between the purified water outlet 122 of the filtering device 120 and the water intake 102. The normal temperature water pipe 1042 may be connected in parallel with the hot water pipe 1041, so that the normal temperature water is delivered to the water intake 102 by the normal temperature water pipe 1042 for the user. The normal temperature water pipeline 1042 directly utilizes the pressure in the filtering device 120 to convey the water to the water intake 102, so that the water way is simpler and more efficient, and meanwhile, the energy is saved. Preferably, the normal temperature water pipeline 1042 may be provided with a water outlet solenoid valve 160, and the water outlet solenoid valve 160 may be closed when the booster pump 110 stops working. After the user is prevented from taking in normal-temperature water, the water is prevented from continuously leaking out of the water intake 102 due to the pressure in the filtering device 120. Of course, the unheated clean water may be directly supplied to the intake 102 by the hot water line 1041. Specifically, when the user needs warm water, the controller may control the heating body 220 to be deactivated, and pump the water to the water intake 102 by the water pump 210. The hot water pipe 1041 is used to provide the user with the hot water, so that the structure of the water purifier 100 is simpler and more compact.

Illustratively, the flow rate of the water pump 210 is adjustable, and the controller is further configured to adjust the flow rate of the water pump 210 based on the target hot water temperature input by the user. Illustratively, in the case of a power determination of the heater 220, the greater the water flow rate through the heater 220, the lower the outlet water temperature of the heater 220. When the user needs hot water at a higher temperature, the controller may control the pumping flow of the water pump 210 to be reduced so that the water temperature at the water intake 102 reaches the target hot water temperature input by the user. The water purifier 100 may also include a return line 106. The water inlet of the return line 106 is connected to the inlet of the hot water line 1041, and the outlet of the return line 106 is connected to the inlet of the booster pump 110. A non-return valve 130 may also be provided on the return line 106.

Illustratively, referring to FIG. 1, the flow rate of the suction pump 210 described above may be adjustable. Illustratively, the water pump 210 may be a flow control pump, which can precisely regulate the flow of the water. Because the flow control pumps may have consistency differences, the service time of the water purifier 100 may also affect the flow accuracy of the flow control pumps, so that the flow control pumps may be closed-loop controlled by the flow information detected by the flow meter 180, and the flow accuracy is improved.

For example, the controller may be configured to control the operation time period of the water pump 210 based on the flow rate information such that the water intake amount at the water intake 102 reaches the target water intake amount. The water purifier 100 may acquire a target water intake amount of a user, control the water pump 210 to pump purified water at an appropriate flow rate, for example, at a rated flow rate, and acquire flow rate information. The controller may acquire the flow information in real-time, only once, or at intervals (e.g., 1 second). The controller controls the water pump 210 to pump purified water at the current flow rate according to the flow rate information until the time required by the target water intake is reached, or simultaneously adjusts the flow rate of the water pump 210 and the working time of the water pump 210 so that the water intake 102 is reached. By way of example and not limitation, it may take time for the flow rate of the water pump 210 to stabilize, and the controller may wait a certain time after the water pump 210 starts to operate, calculate the operation time of the water pump 210 according to the flow rate information, and appropriately compensate the operation time to ensure the accuracy of the target water intake. In another exemplary embodiment, the flow meter 180 obtains flow information in real time, and the controller calculates the amount of water based on the flow information in real time to control the target water intake. Thus, normal temperature water or hot water with target water intake amount can be provided for the user.

The controller may also be used to control the pumping flow of the water pump 210 and/or the power of the heat pipe based on the flow information, such that the water temperature at the water intake 102 reaches a target water intake temperature, for example. With the heater 220 power determination, the greater the water flow through the heater 220, the lower the heater 220 outlet water temperature. The flow rate of the purified water to be heated can be controlled by the water suction pump 210, so that the output water temperature can reach the target water taking temperature in cooperation with the power of the heater 220.

Illustratively, for the water purifier 100 in which the heater 220 is of the instant heating type, when the user needs to take hot water of a higher temperature due to the power limitation of the heater 220, the water flow rate pumped by the water pump 210 is required to be smaller by the heater 220 to heat the water to the temperature required by the user. The water-producing capacity of the filter device 120 is generally determined by the pumping water pressure of the booster pump 110 and the performance of the filter device 120 itself. In order to meet the pressure at which the filter apparatus 120 operates, the pumping water pressure of the booster pump 110 is not generally changed. The water-producing capacity of the filter device 120 is generally unchanged. Thus, when the water flow rate required by the heater 220 is small, high pressure may be accumulated between the clean water outlet 122 of the filter device 120 and the zero pressure valve 170 (if any) or between the clean water outlet 122 and the suction pump 210, and the continued high pressure may cause the pipe to be broken and the waterway element on the pipe to be damaged. Referring to fig. 1, for this purpose, a return line 106 may be provided between the clean water outlet 122 of the filter device 120 and the water inlet of the booster pump 110, and a check valve 130 may be provided on the return line 106, so that when the flow rate of water at the clean water outlet 122 of the filter device 120 is greater than the water output pumped by the water pump 210, the surplus clean water is returned to the upstream of the booster pump 110, and is re-involved in water production. The pipelines and waterway elements on the pipelines can be protected by releasing redundant purified water, so that the service life is prolonged.

Illustratively, referring to FIG. 1, the hot water line 1041 may also be provided with a zero pressure valve 170 upstream of the suction pump 210. When the inflow pressure of the water pump 210 fluctuates, the accuracy of the control flow rate may be lowered, and when the heater 220 is an instant heater, the temperature of the hot water heated by the heater 220 may be unstable. Therefore, the zero-pressure valve 170 disposed upstream of the water pump 210 can provide a stable water inlet pressure for the water pump 210, so as to precisely control the water flow flowing through the heater 220, and further stabilize the temperature of the hot water at the water intake 102.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front", "rear", "upper", "lower", "left", "right", "transverse", "vertical", "horizontal", "top", "bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of the present utility model, and the azimuth terms "inside", "outside" refer to inside and outside with respect to the outline of each component itself.

For ease of description, regional relative terms, such as "above," "upper surface," "above," and the like, may be used herein to describe regional positional relationships of one or more components or features to other components or features shown in the figures. It will be understood that the relative terms of regions include not only the orientation of the components illustrated in the figures, but also different orientations in use or operation. For example, if the element in the figures is turned over entirely, elements "over" or "on" other elements or features would then be included in cases where the element is "under" or "beneath" the other elements or features. Thus, the process is carried out, the exemplary term "above" may be included. Upper and lower. Two orientations below. Moreover, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and all such cases 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 exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, components, assemblies, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The present utility model has been illustrated by the above-described embodiments, but it should be understood that the above-described embodiments are for purposes of illustration and description only and are not intended to limit the utility model to the embodiments described. In addition, it will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that many variations and modifications are possible in light of the teachings of the utility model, which variations and modifications are within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. A water purifier having a raw water inlet and a water intake, comprising:

The water inlet of the booster pump is communicated with the raw water inlet;

the water outlet of the booster pump is communicated with the raw water port of the filtering device;

A hot water pipeline which is communicated between the purified water outlet and the water intake of the filtering device, and is provided with a water suction pump, and

A heater for heating water in the hot water pipe,

Wherein the booster pump is configured to perform a shut-off operation in response to a stop of a hot water taking operation by a user, and the water suction pump is configured to be shut off after the booster pump performs the shut-off operation.

2. The water purifier of claim 1, further comprising a controller electrically connected to the booster pump and the water pump, the controller for controlling the water pump to shut down after a first preset period of time after the booster pump performs the shut-down operation.

3. The water purifier according to claim 1, the water purifier is characterized by further comprising:

A flowmeter for detecting water flow in the hot water pipeline, and

The controller is electrically connected to the flowmeter, the booster pump and the water suction pump and is used for controlling the water suction pump to be turned off after the booster pump executes the turning-off operation and when the water flow is smaller than a preset flow threshold.

4. A water purifier according to claim 2 or 3, wherein the filter device further comprises a concentrate outlet, the water purifier further comprising:

a water outlet, and

The concentrated water electromagnetic valve is communicated between the concentrated water port and the water outlet, and the controller is further used for controlling the concentrated water electromagnetic valve to be opened for a second preset time period and then closed when the booster pump executes the closing operation.

5. A water purifier according to claim 2 or 3, further comprising:

the water inlet electromagnetic valve is communicated between the booster pump and the raw water inlet, and the controller is further used for controlling the water inlet electromagnetic valve to be closed in response to the hot water taking stopping operation.

6. A water purifier according to claim 2 or 3, wherein the flow rate of the water pump is adjustable, the controller further being adapted to adjust the flow rate of the water pump based on a target hot water temperature entered by a user, the water purifier further comprising:

The water inlet of the return pipeline is communicated with the inlet of the hot water pipeline, the outlet of the return pipeline is communicated with the inlet of the booster pump, and the return pipeline is provided with a check valve.

7. The water purifier according to claim 1, the water purifier is characterized by further comprising:

And a controller electrically connected to the water pump and the heater, the controller for controlling the heater and the water pump to be simultaneously turned off after the booster pump performs the turn-off operation.

8. The water purifier of claim 1, further comprising a smart faucet connected to the water intake.

9. The water purifier according to claim 1, the water purifier is characterized by further comprising:

The normal temperature water pipeline is communicated between the purified water outlet and the water intake of the filtering device, and is provided with a water outlet electromagnetic valve which is closed in response to the stopping of normal temperature water taking operation of a user.

10. The water purifier of claim 1, wherein the hot water line is further provided with a zero pressure valve, the zero pressure valve being located upstream of the water pump.