Pure water tank and water purification equipment

Abstract

The utility model belongs to the technical field of water purification, and discloses a pure water tank and water purification equipment. The water purification equipment comprises a filtering assembly, the pure water tank comprises a tank body and a control valve, a pure water inlet, a pure water outlet and a water return port are formed in the tank body, and the pure water inlet is used for being communicated with an outlet of the filtering assembly; the control valve is arranged on the outer wall of the box body and comprises a first water inlet, a second water inlet and a valve water outlet, the first water inlet is used for being communicated with a water source, the second water inlet can be communicated with the water return port, and the valve water outlet is used for being communicated with an inlet of the filtering assembly; the valve water outlet can be selectively communicated with the first water inlet or the second water inlet. The water purification equipment adopts the pure water tank, and is compact in structure and low in cost, so that the bottleneck of high water concentration for the first time is fundamentally solved.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification, in particular to a pure water tank and a water purification device. Background Art

[0002] In common tabletop water purifiers, reverse osmosis filter elements are used to filter raw water. The reverse osmosis membrane is the core component of the reverse osmosis filter element. Concentrated water is obtained on the high-pressure side and pure water is obtained on the low-pressure side. However, when the reverse osmosis membrane stops producing water, there is no pressure difference on both sides of the reverse osmosis membrane, and the concentrated water will penetrate into the pure water over time, increasing the ion concentration of the pure water. Eventually, the ion concentrations on the water inlet side and the wastewater side will both reach equilibrium with the ion concentration on the pure water side. When producing water again, the high-concentration pure water will enter the pure water tank, increasing the TDS (Total Dissolved Solids) value in the pure water tank.

[0003] In some tabletop machines, raw water is introduced to flush the reverse osmosis membrane filter element. In this way, the cleaning of the concentrated water concentration is not thorough enough, and due to the small size, many functions and limited internal space of the tabletop machine, it is difficult to set up a flushing circuit and the cost is high. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a pure water tank and a water purification device, which can solve the problems of large space occupation, difficult installation and high cost of the flushing circuit.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A pure water tank for a water purification device, the water purification device includes a filtration component, and the pure water tank includes:

[0007] A box body, on which a pure water inlet, a pure water outlet and a return water port are arranged. The pure water inlet is used to communicate with the outlet of the filtration component;

[0008] A control valve, which is arranged on the outer wall of the box body. The control valve includes a first water inlet, a second water inlet and a valve water outlet. The first water inlet is used to communicate with a water source, the second water inlet can communicate with the return water port, and the valve water outlet is used to communicate with the inlet of the filtration component. The valve water outlet can selectively communicate with the first water inlet or the second water inlet.

[0009] As an optional solution of the above pure water tank, the control valve includes a first valve body and a first valve core movably arranged in the first valve body. A hollow insertion rod is arranged on the first valve body. One end of the insertion rod is communicated with the inside of the first valve body, and the other end forms the second water inlet. The insertion rod passes through the return water port.

[0010] As an alternative to the above-mentioned pure water tank, a seal is provided in the water return port, and the seal is sleeved outside the insertion rod to seal the gap between the water return port and the insertion rod.

[0011] As an alternative to the above-mentioned pure water tank, the seal includes:

[0012] A sleeve, sleeved on the insertion rod and located within the water return port;

[0013] An annular flange, connected to one axial end of the sleeve and disposed circumferentially around the sleeve, and the annular flange is clamped between the first valve body and the box body.

[0014] As an alternative to the above-mentioned pure water tank, the first valve body is provided with a raw water rod and a water outlet rod that are both hollow. One end of the raw water rod is in communication with the interior of the first valve body, and the other end forms the first water inlet. One end of the water outlet rod is in communication with the interior of the first valve body, and the other end forms the valve water outlet. The raw water rod and the water outlet rod are both perpendicular to the insertion rod.

[0015] As an alternative to the above-mentioned pure water tank, the water return port is located on the bottom side of the box body;

[0016] And / or, the pure water tank further includes a mounting bracket, the mounting bracket is connected to the box body, and the control valve is disposed on the mounting bracket.

[0017] As an alternative to the above-mentioned pure water tank, the pure water tank further includes a check valve, the check valve is disposed in the water return port, the check valve restricts the fluid outside the box body from entering the box body, and the second water inlet is communicated with the water return port through the check valve.

[0018] As an alternative to the above-mentioned pure water tank, the check valve includes:

[0019] A second valve body, one end of the second valve body facing the inner side of the box body is provided with a one-way water inlet, and the opposite end of the second valve body is provided with a one-way water outlet;

[0020] A second valve core, slidably disposed within the second valve body, so that the second valve core can move between a first position blocking the one-way water inlet and a second position opening the one-way water inlet;

[0021] An elastic member, elastically connecting the second valve body and the second valve core, and the elastic force exerted by the elastic member on the second valve core points from the second position to the first position.

[0022] As an alternative to the above-mentioned pure water tank, the check valve further includes:

[0023] The first sealing ring is sleeved on the second valve body, and the first sealing ring is clamped between the inner wall of the water return port and the second valve body;

[0024] The second sealing ring is sleeved on the second valve core, and the second sealing ring can abut against the second valve body when the second valve core is in the first position.

[0025] A water purification device includes:

[0026] A filtration component, and the filtration component includes a reverse osmosis filter element;

[0027] The above-mentioned pure water tank, the pure water inlet is communicated with the outlet of the filtration component, and the first water inlet is used to communicate with a water source;

[0028] A raw water pump is located between the valve water outlet and the filtration component, or between the filtration component and the box body.

[0029] The beneficial effects of the present utility model:

[0030] In the pure water tank provided by the present utility model, the control valve is arranged on the box body and is directly communicated with the water return port, with a compact structure, which is beneficial to reducing the occupied space; the control valve can be first assembled with the box body and then assembled with the whole machine, with low assembly difficulty and little influence from the overall size of the water purification device.

[0031] The control valve is arranged on the box body and is directly connected to the box body, without the need to add a pipeline to connect the control valve and the check valve, reducing the pipeline layout cost, and thus being beneficial to controlling the overall cost of the machine.

[0032] A check valve is arranged in the water return port, which can cooperate with the control valve to realize double restrictions on the water flow direction at the water return port; the check valve is arranged in the water return port and integrated inside the box body, without the need to additionally occupy the space outside the box body; the check valve is directly connected to the box body, without the need to additionally set a pipeline connecting the check valve and the box body, reducing the pipeline layout cost;

[0033] The control valve has two working states. In one working state, the first water inlet is communicated with the valve water outlet. That is to say, the raw water provided by the water source can enter the control valve through the first water inlet and then enter the filtration component through the valve water outlet to meet the water production requirement. In another working state, the second water inlet is communicated with the valve water outlet. In this state, raw water cannot be provided to the filtration component, while the pure water in the box body can enter the control valve through the second water inlet and then enter the filtration component through the valve water outlet to meet the requirement of flushing the filtration component. The switching between the two working states of water production and flushing can be realized through one control valve, which is beneficial to reducing the number of parts in the water purification device, and thus can achieve the effects of simplifying the structure and reducing the cost.

[0034] The water purification device provided by the present utility model adopts the above-mentioned pure water tank, which has a compact structure and low cost. Since the water level for flushing the filter assembly is high-purity pure water, after a period of flushing, all the water in the filter assembly is replaced by pure water, thus fundamentally solving the bottleneck of high initial water concentration. Description of the Drawings

[0035] Figure 1 is a schematic structural diagram of the water purification device provided by the present utility model;

[0036] Figure 2 is a schematic structural diagram of the pure water tank provided by the present utility model;

[0037] Figure 3 is a cross-sectional view of the pure water tank provided by the present utility model;

[0038] Figure 4 is a cross-sectional view of the one-way valve provided by the present utility model when the one-way water inlet is closed;

[0039] Figure 5 is a cross-sectional view of the one-way valve provided by the present utility model when the one-way water inlet is open.

[0040] In the figure:

[0041] 11. Box body; 12. One-way valve; 1201. One-way water inlet; 121. Second valve body; 1211. Valve sleeve; 1212. End cover; 122. Second valve core; 123. Elastic member; 124. First sealing ring; 125. Second sealing ring; 13. Control valve; 131. First valve body; 132. Insertion rod; 133. Raw water rod; 134. Water outlet rod; 14. Liquid level detection assembly; 15. Sealing member; 151. Sleeve; 152. Annular flange; 16. Mounting rack; 20. Filter assembly; 21. First filter element; 22. Second filter element; 30. Raw water tank; 40. Raw water pump; 50. Water outlet pump; 60. Heating element; 61. Inlet water temperature detection part; 62. Outlet water temperature detection part; 70. Disinfection lamp; 81. Waste water pipeline; 82. Switch valve; 90. TDS detection part. Detailed Embodiments

[0042] The following further describes the present utility model in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present utility model and not for limiting the present utility model. Additionally, it should be noted that for the sake of description, only parts related to the present utility model are shown in the drawings rather than all the structures.

[0043] In the description of the present utility model, unless otherwise clearly specified and defined, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0045] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0046] As Figure 1 shown, this embodiment provides a water purification device, which includes a filtration component 20, a raw water pump 40, and a pure water tank. The raw water pump 40, the filtration component 20, and the pure water tank are connected in sequence. When the water purification device is working, under the action of the raw water pump 40, the raw water is filtered by the filtration component 20 to obtain pure water, and the pure water enters the pure water tank for storage so as to be supplied to users for use. Among them, the filtration component 20 can filter impurities in the water and reduce the ion concentration in the water to obtain pure water.

[0047] In this embodiment, the water purification device is a water dispenser with heating function, which can provide water purification and drinking functions for users. In other embodiments, the water purification device can also be a water purifier or other devices with water purification functions.

[0048] Optionally, the filtration component 20 includes a reverse osmosis filter element, which can effectively remove dissolved salts, colloids, microorganisms, organic matters, etc. in the water to improve the water quality, and has the advantages of low energy consumption and no pollution.

[0049] In this embodiment, the filtration assembly 20 includes two filter elements, namely a first filter element 21 and a second filter element 22. Among them, the first filter element 21 is a PPC filter element, and the second filter element 22 is a RO filter element, that is, a reverse osmosis filter element. Through the cooperation of the first filter element 21 and the second filter element 22, the purification effect of the water quality can be improved to meet the user's usage requirements.

[0050] Along the water inlet direction, the first filter element 21 is located upstream of the second filter element 22, that is, the raw water first passes through the first filter element 21 for filtration and then through the second filter element 22 for filtration, so as to prevent larger particulate impurities in the water from clogging or damaging the reverse osmosis filter element.

[0051] In other embodiments, the filtration assembly 20 may only include one reverse osmosis membrane filter element, or may be provided with three, four or more filter elements. As long as one of the multiple filter elements is a reverse osmosis filter element, the arrangement order of the reverse osmosis filter element among the multiple filter elements can be adjusted as needed.

[0052] It should be noted here that both the PPC filter element and the RO filter element are common filter elements in the prior art, and their structures and filtration principles are all prior art, which will not be elaborated in this embodiment.

[0053] To prevent the ion concentrations on the water inlet side, concentrated water side and pure water side of the reverse osmosis filter element from reaching equilibrium during the standby process of the water purification device, thereby affecting the ion concentration in the pure water during the next water production, the water purification device in this embodiment further includes a flushing circuit, and the flushing circuit can flush the filtration assembly 20 to solve the problem of high ion concentration in the pure water during the first water production.

[0054] Specifically, one end of the flushing circuit is connected to the pure water tank, and the other end is connected to the inlet of the filtration assembly 20. That is to say, the pure water in the pure water tank is used to flush the filtration assembly 20, and a part of the pure water passing through the filtration assembly 20 returns to the pure water tank during the flushing process. Repeating the previous cycle can reduce the ion concentration of the pure water in the pure water tank to meet the user's usage requirements.

[0055] Due to the small size of the water purifier, especially the desktop water purifier, the installation space of the flushing circuit in the water purifier is limited, resulting in problems such as difficult installation and increased cost.

[0056] To solve the above problems, this embodiment provides an improved pure water tank, which is structurally compact, reduces the occupied space and saves costs on the basis of realizing the flushing function.

[0057] Combined with Figure 1 and Figure 2As shown in the figure, the pure water tank includes a box body 11, a one-way valve 12, and a control valve 13. The box body 11 is used to store water. The box body 11 is provided with a pure water inlet, a pure water outlet, and a return water port. Among them, the pure water inlet is used to connect to the outlet of the filtration component 20 so that the pure water obtained through the filtration component 20 can enter the box body 11 for storage; the pure water outlet is used to provide pure water for the convenience of users; the return water port is used to realize the return of pure water to achieve the function of flushing the filtration component 20. The one-way valve 12 is arranged in the return water port. The one-way valve 12 is used to restrict the fluid outside the box body 11 from entering the box body 11. That is to say, the pure water in the box body 11 can flow out of the box body 11 through the one-way valve 12 and the return water port. The control valve 13 is arranged on the outer wall of the box body 11. The control valve 13 includes a first water inlet, a second water inlet, and a valve outlet. The first water inlet is used to connect to a water source to provide raw water for the water purification device; the second water inlet is connected to the one-way valve 12, and the valve outlet is used to connect to the inlet of the filtration component 20. The valve outlet can selectively communicate with the first water inlet or the second water inlet.

[0058] In this embodiment, the return water port is connected to the inlet of the filtration component 20 through the one-way valve 12 and the control valve 13 in sequence to realize the flushing of the filtration component 20. The one-way valve 12 is arranged in the return water port and integrated inside the box body 11, without the need to additionally occupy the space outside the box body 11. The control valve 13 is arranged on the box body 11 and directly connected to the one-way valve 12, with a compact structure, which is beneficial to reducing the occupied space; both the control valve 13 and the one-way valve 12 can be first assembled with the box body 11 and then assembled into the whole machine, with low assembly difficulty and little influence from the overall size of the water purification device.

[0059] The one-way valve 12 is directly connected to the box body 11, without the need to additionally set up a pipeline connecting the one-way valve 12 and the box body 11, reducing the pipeline layout cost; the control valve 13 is arranged on the box body 11 and directly connected to the box body 11, without the need to add a pipeline to connect the control valve 13 and the one-way valve 12, reducing the pipeline layout cost, which is thus beneficial to controlling the overall cost of the machine.

[0060] In addition, the control valve 13 includes two inlets (the first water inlet and the second water inlet respectively) and one outlet (the valve water outlet), and has two working states. In one working state, the first water inlet is communicated with the valve water outlet. That is to say, the raw water provided by the water source can enter the control valve 13 through the first water inlet, and then enter the filtration assembly 20 through the valve water outlet to meet the water production requirement. In the other working state, the second water inlet is communicated with the valve water outlet. In this state, raw water cannot be provided to the filtration assembly 20, while the pure water in the box body 11 can enter the control valve 13 through the second water inlet, and then enter the filtration assembly 20 through the valve water outlet to meet the requirement of flushing the filtration assembly 20. By means of a control valve 13, the switching between the two working states of water production and flushing can be realized, which is beneficial to reducing the number of parts in the water purification equipment, so as to simplify the structure and reduce the cost.

[0061] Since the water for flushing the filtration assembly 20 is high-purity pure water, after a period of flushing, all the water in the filtration assembly 20 is replaced by pure water, thus fundamentally solving the bottleneck of high initial water concentration.

[0062] In this embodiment, the control valve 13 can be a solenoid valve to realize the automatic switching of the valve path, so as to automatically start the flushing of the filtration assembly 20 or normal water production. Optionally, the control valve 13 can be a two-in-one-out valve.

[0063] In this embodiment, a groove is formed by the inner concave of the outer wall of the box body 11, and through holes are arranged on the bottom surface of the groove. The through holes and the groove cooperate to form a water return port. This kind of setting makes the water return port have a certain depth, provides an installation space for the one-way valve 12, facilitates the connection between the control valve 13 and the one-way valve 12, and makes the structure more compact.

[0064] Specifically, the control valve 13 includes a first valve body 131 and a first valve core movably arranged in the first valve body 131. A hollow insertion rod 132 is arranged on the first valve body 131. One end of the insertion rod 132 is communicated with the inside of the first valve body 131, and the other end forms the second water inlet. The insertion rod 132 passes through the water return port and is communicated with the one-way valve 12. In this embodiment, part of the control valve 13 is located in the water return port. On the one hand, it can make the structure more compact and better reduce the occupied space. On the other hand, it is convenient to be communicated with the one-way valve 12, and can provide a positioning and fixing effect on the one-way valve 12.

[0065] As Figure 3 shown, the one-way valve 12 is arranged in the groove and can be limited between the insertion rod 132 and the bottom surface of the groove under the cooperation of the insertion rod 132, so as to realize the positioning and fixing of the one-way valve 12 and improve the accuracy and stability of the position of the one-way valve 12.

[0066] To improve the sealing effect of the box body 11 at the water return port, a sealing member 15 is arranged in the water return port. The sealing member 15 is sleeved outside the insertion rod 132 to seal the gap between the water return port and the insertion rod 132, thereby preventing the box body 11 from leaking water.

[0067] Exemplarily, the sealing member 15 includes a sleeve 151 and an annular flange 152. The sleeve 151 is sleeved on the insertion rod 132 and is located in the water return port. The sleeve 151 can be clamped by the inner wall of the water return port and the outer wall of the insertion rod 132 to block the annular gap between the inner wall of the water return port and the outer wall of the insertion rod 132; the annular flange 152 is connected to one axial end of the sleeve 151 and is arranged circumferentially around the sleeve 151. The annular flange 152 is clamped between the first valve body 131 and the box body 11 and can block the gap between the water return port and the valve body. Through the cooperation of the sleeve 151 and the annular flange 152, the sealing effect at the water return port can be improved, and water leakage at the water return port can be avoided.

[0068] Optionally, the sealing member 15 abuts against the check valve 12 along the axial direction of the check valve 12 to press the check valve 12 tightly against the bottom surface of the groove, so as to further improve the fixing effect on the check valve 12.

[0069] Optionally, a protrusion is arranged on the outer wall of the sleeve 151, and the protrusion can abut against the inner wall of the water return port to further improve the sealing effect.

[0070] Exemplarily, the protrusion can be an annular protrusion arranged circumferentially around the sleeve 151 to achieve circumferential contact with the inner wall of the water return port, and the sealing effect is good; the number of the annular protrusions can be set to at least two, and at least two annular protrusions can be arranged at intervals along the axial direction of the sleeve 151.

[0071] In this embodiment, a raw water rod 133 and a water outlet rod 134 which are both hollow are further arranged on the first valve body 131. One end of the raw water rod 133 is communicated with the inside of the first valve body 131, and the other end forms a first water inlet. One end of the water outlet rod 134 is communicated with the inside of the first valve body 131, and the other end forms a valve water outlet. By arranging the hollow raw water rod 133 and water outlet rod 134, it is convenient to connect the control valve 13 with the water source and the filtration assembly 20.

[0072] Optionally, both the raw water rod 133 and the water outlet rod 134 are perpendicular to the insertion rod 132, so that the settings of the first inlet, the second inlet and the valve water outlet are relatively dispersed, which is convenient for connecting with the water source and the filtration assembly 20 and is beneficial to the rational utilization of the internal space of the water purification device.

[0073] Exemplarily, the water return port is arranged on the side wall of the box body 11. The insertion rod 132 extends in a substantially horizontal direction. The raw water rod 133 and the water outlet rod 134 both extend in a substantially vertical direction and are respectively located on opposite sides of the first valve body 131. With this arrangement, the insertion rod 132, the raw water rod 133, and the water outlet rod 134 are respectively located on three sides of the first valve body 131, and the space between any two of them is relatively large, leaving enough space for installation, connection and other operations, reducing the operation difficulty. The raw water rod 133 and the water outlet rod 134 both extend in a substantially vertical direction, occupying the height direction of the water tank for installation or connection, which is beneficial to reducing the floor area of the pure water tank in the horizontal direction, making the structure more compact.

[0074] The control valve 13 further includes an electromagnetic assembly. The electromagnetic assembly is arranged on the first valve body 131. The electromagnetic assembly is used to drive the valve core to move in the first valve body 131 to realize the switching of the valve path. It should be noted here that the switching of the valve path in the solenoid valve is a prior art in this field. The control valve 13 in this embodiment can adopt any structure and principle in the prior art, as long as it can selectively connect the first water inlet and the second water inlet to the valve water outlet.

[0075] In this embodiment, the water return port is located on the bottom side of the box body 11 to reduce the height of the water return port and ensure sufficient pure water volume when flushing the filter assembly 20.

[0076] In this embodiment, as Figure 2 shown, the pure water tank further includes a mounting bracket 16. The mounting bracket 16 is connected to the box body 11, and the control valve 13 is arranged on the mounting bracket 16. Optionally, the mounting bracket 16 and the box body 11 are fixedly connected by screws. Exemplarily, fixing columns are convexly provided on the outer wall of the box body 11, and the screws are threadedly connected to the fixing columns after passing through the mounting bracket 16 to realize the fixation of the mounting bracket 16 and the box body 11.

[0077] Optionally, the mounting bracket 16 is provided with a limiting groove, and at least part of the control valve 13 is arranged in the limiting groove to position the position of the control valve 13, which is beneficial to improving the stability of the fixed position of the control valve 13.

[0078] Optionally, the control valve 13 can be fixed to the mounting bracket 16 by screws, or the control valve 13 is clamped in the limiting groove to realize fixation.

[0079] In this embodiment, as Figure 4 and Figure 5As shown in the figure, the one-way valve 12 includes a second valve body 121, a second valve core 122, and an elastic member 123. One end of the second valve body 121 facing the inner side of the box body 11 is provided with a one-way water inlet 1201, and the opposite end of the second valve body 121 is provided with a one-way water outlet; the second valve core 122 is slidably arranged in the second valve body 121 so that the second valve core 122 can move between a first position blocking the one-way water inlet 1201 and a second position opening the one-way water inlet 1201; the elastic member 123 is elastically connected to the second valve body 121 and the second valve core 122, and the elastic force exerted by the elastic member 123 on the second valve core 122 points from the second position to the first position. When the second water inlet is communicated with the valve water outlet, the raw water pump 40 is started. The raw water pump 40 will generate an adsorption force in the one-way valve 12, and the second valve core 122 will overcome the elastic force of the elastic member 123 under the action of the adsorption force to open the one-way water inlet 1201, so that the pure water in the box body 11 enters the one-way valve 12 through the one-way water inlet 1201 and then flows to the filter assembly 20 through the control valve 13 to achieve the purpose of flushing the filter assembly 20.

[0080] The second valve body 121 includes a valve sleeve 1211 and an end cover 1212. One axial end of the valve sleeve 1211 forms a one-way water inlet 1201, and the end cover 1212 is arranged at the other axial end of the valve sleeve 1211. The end cover 1212 is provided with a one-way water outlet. By setting the second valve body 121 as the valve sleeve 1211 and the end cover 1212, it is convenient to assemble the second valve core 122 and the elastic member 123 into the second valve body 121. Optionally, the end cover 1212 and the valve sleeve 1211 can be fixed by a snap connection.

[0081] To improve the sealing performance of the one-way valve 12, the one-way valve 12 further includes a first sealing ring 124. The first sealing ring 124 is sleeved on the second valve body 121, and the first sealing ring 124 is clamped between the inner wall of the water return port and the second valve body 121 so that the one-way valve 12 is in sealing cooperation with the water return port.

[0082] Optionally, the one-way valve 12 further includes a second sealing ring 125. The second sealing ring 125 is sleeved on the second valve core 122, and the second sealing ring 125 can abut against the second valve body 121 when the second valve core 122 is in the first position to improve the sealing effect of the second valve core 122 on the water return port.

[0083] Optionally, the raw water pump 40 is arranged between the control valve 13 and the filter assembly 20 to improve the suction opening effect on the second valve core 122 in the one-way valve 12 after the raw water pump 40 is started.

[0084] In this embodiment, the water purification device further includes a raw water tank 30. A raw water chamber is arranged in the raw water tank 30 for containing raw water. The raw water chamber is communicated with the first water inlet of the control valve 13, that is, the raw water tank 30 serves as the water source of the water purification device.

[0085] A wastewater chamber is also provided in the original water tank 30. The filtration assembly 20 further includes a wastewater outlet, and the wastewater outlet is communicated with the wastewater chamber through a wastewater pipe 81 to collect wastewater. When the second water inlet is communicated with the valve water outlet, after the pure water in the pure water tank flushes the filtration assembly 20, a part of the pure water returns to the original water tank 30, and the other part enters the wastewater chamber through the wastewater pipe 81.

[0086] Optionally, a switching valve 82 is provided on the wastewater pipe 81, and the switching valve 82 can control the on-off of the wastewater pipe 81.

[0087] In some embodiments, the first water inlet of the control valve 13 can be directly communicated with tap water. By accessing tap water as the water source, there is no need to set up the original water tank 30, which can simplify the structure of the water purification device and reduce costs.

[0088] Optionally, as Figure 1 shown, a liquid level detection assembly 14 is provided in the box body 11. The liquid level detection assembly 14 is used to detect the water level of the pure water in the box body 11, so as to prepare pure water in time when there is a lack of pure water in the box body 11, or stop preparing pure water when the water level in the box body 11 is relatively high, so as to avoid pure water overflow or causing potential safety hazards.

[0089] Exemplarily, the liquid level detection assembly 14 can be a pressure water level sensor, an optical liquid level sensor, a float liquid level sensor or a resistive liquid level sensor.

[0090] Optionally, the water purification device further includes a water outlet pump 50 and a water outlet assembly. The water outlet pump 50 is communicated with the pure water outlet of the water tank and the water outlet structure to provide pure water through the water outlet structure.

[0091] Optionally, the water purification device further includes a heating element 60. The heating element 60 is arranged between the water outlet pump 50 and the water outlet structure and can heat the passing pure water to provide hot water for users. Exemplarily, the heating element 60 can be an electric heating tube, a resistance wire or other structures capable of heating water.

[0092] Optionally, an inlet water temperature detection component 61 is arranged upstream of the heating element 60, and an outlet water temperature detection component 62 is arranged downstream of the heating element 60. The inlet water temperature detection component 61 and the outlet water temperature detection component 62 are both communicatively connected to the heating element 60, so as to adjust the power of the heating element 60 according to the inlet water temperature and the outlet water temperature, so that the outlet water temperature meets the user's requirements. Exemplarily, both the inlet water temperature detection component 61 and the outlet water temperature detection component 62 can be thermistors.

[0093] Optionally, TDS detection components 90 can be arranged between the box body 11, the first filter element 21 and the second filter element 22 respectively to detect the TDS value of the raw water and the TDS value of the pure water respectively, so as to better control the water quality and judge the filtering effect of the filtering assembly 20.

[0094] Optionally, the box body 11 is further provided with a disinfection lamp 70, which is used to disinfect the pure water in the box body 11 to ensure the hygiene of drinking. Exemplarily, the disinfection lamp 70 can be a UV lamp.

[0095] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A pure water tank for a water purification device, the water purification device comprising a filter assembly (20), characterized in that: The pure water tank comprises: A box body (11), wherein the box body (11) is provided with a pure water inlet, a pure water outlet and a water return port, wherein the pure water inlet is used to communicate with the outlet of the filter assembly (20); A control valve (13), wherein the control valve (13) is arranged on the outer wall of the box body (11), and the control valve (13) comprises a first water inlet, a second water inlet and a valve water outlet, wherein the first water inlet is used to connect to a water source, the second water inlet can be connected to the return water port, the valve water outlet is used to connect to the inlet of the filter assembly (20), and the valve water outlet can selectively connect to the first water inlet or the second water inlet.

2. The pure water tank according to claim 1, characterized in that: The control valve (13) comprises a first valve body (131) and a first valve core movably arranged in the first valve body (131); a hollow plug rod (132) is arranged on the first valve body (131); one end of the plug rod (132) is connected to the interior of the first valve body (131), and the other end forms the second water inlet; the plug rod (132) is inserted into the water return port.

3. The pure water tank according to claim 2, characterized in that: A sealing member (15) is arranged inside the water return port, and the sealing member (15) is sleeved outside the insertion rod (132) to seal the gap between the water return port and the insertion rod (132).

4. The pure water tank according to claim 3, characterized in that: The sealing member (15) comprises: A sleeve (151) is sleeved on the insertion rod (132) and is located in the water return port; An annular flange (152) is connected to one axial end of the sleeve (151) and is arranged around the circumference of the sleeve (151). The annular flange (152) is clamped between the first valve body (131) and the box body (11).

5. The pure water tank according to claim 2, characterized in that: The first valve body (131) is provided with a raw water rod (133) and a water outlet rod (134) both of which are hollow. One end of the raw water rod (133) is connected to the interior of the first valve body (131), and the other end forms the first water inlet. One end of the water outlet rod (134) is connected to the interior of the first valve body (131), and the other end forms the valve water outlet. The raw water rod (133) and the water outlet rod (134) are both arranged vertically with the insertion rod (132).

6. The pure water tank according to any one of claims 1 to 5, characterized in that: The water return port is located on the bottom side of the box body (11); And / or, the pure water tank further comprises a mounting frame (16), the mounting frame (16) is connected to the box body (11), and the control valve (13) is arranged on the mounting frame (16).

7. The pure water tank according to any one of claims 1 to 5, characterized in that: The pure water tank further comprises a one-way valve (12), wherein the one-way valve (12) is arranged in the water return port, and the one-way valve (12) limits the external fluid of the tank body (11) from entering the tank body (11), and the second water inlet is connected to the water return port via the one-way valve (12).

8. The pure water tank according to claim 7, characterized in that: The one-way valve (12) comprises: a second valve body (121), wherein one end of the second valve body (121) facing the inner side of the box body (11) is provided with a one-way water inlet (1201), and the other end of the second valve body (121) opposite thereto is provided with a one-way water outlet; A second valve core (122) is slidably disposed in the second valve body (121), so that the second valve core (122) can move between a first position for blocking the one-way water inlet (1201) and a second position for opening the one-way water inlet (1201); An elastic member (123) elastically connects the second valve body (121) and the second valve core (122), and an elastic force applied by the elastic member (123) to the second valve core (122) is directed from the second position to the first position.

9. The pure water tank according to claim 8, characterized in that: The one-way valve (12) further comprises: A first sealing ring (124) is sleeved on the second valve body (121), and the first sealing ring (124) is clamped between the inner wall of the water return port and the second valve body (121); The second sealing ring (125) is sleeved on the second valve core (122), and the second sealing ring (125) can abut against the second valve body (121) when the second valve core (122) is located at the first position.

10. A water purification device, characterized in that: include: A filter assembly (20), wherein the filter assembly (20) comprises a reverse osmosis filter element; The pure water tank according to any one of claims 1 to 9, wherein the pure water inlet is connected to the outlet of the filter assembly (20), and the first water inlet is used to connect to a water source; The raw water pump (40) is located between the valve water outlet and the filter assembly (20), or between the filter assembly (20) and the housing (11).

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