Water purifier

Abstract

The utility model discloses a water purifier which comprises a purified water supply unit and a water purification unit, the heating unit is used for heating purified water in the first water storage unit; a second water storage unit; a heat exchange device; the first water storage unit is communicated with the second water storage unit through the first water path; the second water storage unit is communicated with the first water storage unit through the second water path, and the first water storage unit, the first water path, the second water storage unit and the second water path can form a circulating water path, so that water flow circularly flows between the first water storage unit and the second water storage unit; and the like. By arranging the circulating water path, the water flow circularly flows between the first water storage unit and the second water storage unit by utilizing the density difference of water, and the problem that the temperature of cold boiled water is reduced due to heat dissipation of the second water storage unit storing the cold boiled water is solved.

Description

Technical Field

[0001] This utility model relates to the field of water purification supply technology, and in particular to a water purifier. Background Technology

[0002] Water purifiers play a vital role in the current drinking water supply sector, especially those that can directly dispense "cooled boiled water," providing convenience to users. These purifiers replenish cold purified water into a hot tank via a heat exchanger. Boiled water in the hot tank exchanges heat with the cold purified water through the heat exchanger to form "cooled boiled water," which is stored in a water storage unit and then supplied to users through a water dispensing mechanism.

[0003] However, in actual use, the heat dissipation of the water storage unit causes the temperature of the "cooled boiled water" in the water storage unit to drop, especially in the cold winter. At this time, a serious problem is exposed, that is, the temperature of the "cooled boiled water" is far below 45℃. This greatly affects the user's water dispensing experience, causes inconvenience to the user, and reduces the practicality and applicability of the water purifier in such low-temperature scenarios, which urgently needs to be improved. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a water purifier that can solve the problem of the temperature of "cooled boiled water" decreasing due to heat dissipation from the water storage unit storing "cooled boiled water".

[0005] The specific technical solution of this utility model embodiment is as follows:

[0006] A water purifier, comprising:

[0007] Water purification supply unit;

[0008] A first water storage unit and a heating unit for heating the purified water in the first water storage unit;

[0009] Second water storage unit;

[0010] A heat exchange device having a first flow channel and a second flow channel that enable heat exchange of a flowing liquid, wherein the inlet of the first flow channel is connected to the outlet of the purified water supply unit, the outlet of the first flow channel is connected to the inlet of the first water storage unit, the inlet of the second flow channel is connected to the outlet of the first water storage unit, and the outlet of the second flow channel is connected to the inlet of the second water storage unit.

[0011] The first waterway connects the first water storage unit to the second water storage unit.

[0012] The second water channel connects the second water storage unit to the first water storage unit. The first water storage unit, the first water channel, the second water storage unit, and the second water channel can form a circulating water channel so that the water flows in a circulating manner between the first water storage unit and the second water storage unit.

[0013] A water output mechanism, which is connected to the second water storage unit.

[0014] Preferably, when the hot purified water in the first water storage unit can flow into the second water storage unit through the first water passage due to the density difference, the purified water in the second water storage unit flows into the first water storage unit through the second water passage.

[0015] Preferably, the height of the second water storage unit is higher than the height of the first water storage unit.

[0016] Preferably, when the hot purified water in the first water storage unit flows into the second water storage unit through the first water path due to the density difference, the water flowing through the first water path has an upward tendency from the first water storage unit toward the second water storage unit.

[0017] Preferably, at least one on / off valve is provided in the circulating water circuit.

[0018] Preferably, a first on / off valve is provided on the first water line, and a second on / off valve is provided on the second water line.

[0019] Preferably, the water output mechanism is located on the first waterway or the second waterway.

[0020] Preferably, the water output mechanism is disposed on the second water path.

[0021] Preferably, the water output mechanism includes: a first port, a second port, and a flow channel connecting the first port and the second port respectively; a water outlet section, wherein a water outlet flow channel is formed within the water outlet section, and at least a portion of the flow channel contacts at least a portion of the outer wall of the water outlet section; an on / off control module, wherein the on / off control module controls the on / off connection between the water outlet flow channel and the flow channel; the water output mechanism is connected to the second water path through the first port and the second port.

[0022] Preferably, the water purifier further includes: a third water path, through which the first water storage unit is connected to the second water storage unit; and a fourth water path, through which the outlet of the purified water supply unit is connected to the first water storage unit; the purified water supply unit includes a booster pump, and when the booster pump is activated, the purified water supply unit can output cold purified water that flows into the first water storage unit through the fourth water path, while the hot purified water in the first water storage unit flows into the second water storage unit through the third water path.

[0023] Preferably, the water output mechanism is located on the third water path.

[0024] Preferably, the hot purified water in the first water storage unit flows through the water output mechanism to sterilize the water outlet section of the water output mechanism.

[0025] Preferably, a third on / off valve is provided on the third water line, and a fourth on / off valve is provided on the fourth water line.

[0026] Preferably, the water purifier further includes: a drain water path with a fifth shut-off valve, the drain water path being connected to the first water storage unit.

[0027] Preferably, the second waterway and the third waterway have at least a partial first overlapping waterway.

[0028] Preferably, the water output mechanism is disposed on the first overlapping water path.

[0029] Preferably, the second waterway and the fourth waterway have at least a partial second overlapping waterway.

[0030] Preferably, the water purifier further includes a fifth water channel, the outlet of the first flow channel is connected to the inlet of the first water storage unit through the fifth water channel, and the second water channel and the fifth water channel have at least a partial third overlapping water channel.

[0031] Preferably, the second water storage unit has a temperature measuring unit for measuring the temperature of the purified water inside; the water purifier has a second water storage unit in a heat preservation state. When the second water storage unit is in a heat preservation state, the temperature of the purified water in the second water storage unit measured by the temperature measuring unit is lower than a preset temperature. The first on-off valve and the second on-off valve are in an open state, so that the water in the first water storage unit and the water in the second water storage unit form a circulating flow through the circulating water circuit.

[0032] Preferably, the water purifier has a sterilization state. In the sterilization state, the booster pump, the third on / off valve, and the fourth on / off valve are in the open state, so that the hot purified water in the first water storage unit flows through the water output mechanism to sterilize the water outlet in the water output mechanism.

[0033] Preferably, the heat exchange device includes a first heat exchange tube and a second heat exchange tube passing through the first heat exchange tube, wherein one of the first flow channel and the second flow channel is formed inside the second heat exchange tube, and the other of the first flow channel and the second flow channel is formed between the outer sidewall of the second heat exchange tube and the inner sidewall of the first heat exchange tube.

[0034] The technical solution of this utility model has the following significant beneficial effects:

[0035] By setting up a circulating water system, the density difference of water is used to circulate water between a first and a second water storage unit. Within this system, due to the difference in water density at different temperatures, the water in the first storage unit, at a relatively higher temperature, has a relatively lower density, while the water in the second storage unit, at a lower temperature, has a relatively higher density. This density difference causes a natural flow tendency; the denser, cooler water flows towards the first storage unit under the influence of gravity, while the less dense, warmer water in the first storage unit flows towards the second. Therefore, the water continuously circulates between the first and second storage units. This effectively maintains the temperature of the water in the second storage unit without the need for additional power. This natural circulation model based on water density difference greatly simplifies traditional complex water systems, reducing both equipment investment costs and maintenance difficulty. Attached Figure Description

[0036] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0037] Figure 1 This is a schematic diagram of the water purifier in the first embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the water flow in the second water storage unit under the heat preservation state in the first embodiment of the present invention.

[0039] Figure 3 This is a schematic diagram of the water purifier in the second embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of the water flow in the sterilization state of the water purifier in the second embodiment of this utility model.

[0041] Figure 5 This is a cross-sectional structural diagram of the water output mechanism in this utility model.

[0042] The reference numerals in the above figures are as follows: 1. Water supply unit; 2. First water storage unit; 3. Heating unit; 4. Heat exchange device; 41. First flow channel; 42. Second flow channel; 5. Second water storage unit; 6. Water output mechanism; 61. First port; 62. Second port; 63. Flow channel; 64. Water outlet; 641. Water outlet flow channel; 65. On / off control module; 7. First water path; 71. First on / off valve; 8. Second water path; 81. Second on / off valve; 9. Third water path; 91. Third on / off valve; 10. Fourth water path; 101. Fourth on / off valve; 11. Drainage water path; 111. Fifth on / off valve; 12. Fifth water path; 13. Booster pump. Detailed Implementation

[0043] The details of this utility model can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of this utility model described herein are for illustrative purposes only and should not be construed as limiting the utility model in any way. Under the teachings of this utility model, those skilled in the art can conceive of any possible modifications based on this utility model, and these should all be considered to fall within the scope of this utility model.

[0044] In order to solve the problem of the temperature drop of "cooled boiled water" caused by heat dissipation from the water storage unit, this application proposes a water purifier. Figure 1 This is a schematic diagram of the water purifier in the first embodiment of the present invention, as shown below. Figure 1As shown, the water purifier may include: a purified water supply unit 1; a first water storage unit 2 and a heating unit 3 for heating the purified water in the first water storage unit 2; and a heat exchange device 4, which has a first flow channel 41 and a second flow channel 42 that allow heat exchange between the flowing liquids. The inlet of the first flow channel 41 is connected to the outlet of the purified water supply unit 1, the outlet of the first flow channel 41 is connected to the inlet of the first water storage unit 2, the inlet of the second flow channel 42 is connected to the outlet of the first water storage unit 2, and the outlet of the second flow channel 42 is connected to the inlet of the second water storage unit 5, so that the purified water supply unit 1 can heat the output cold water. When purified water is replenished into the first water storage unit 2 through the first flow channel 41, the hot purified water in the first water storage unit 2 is cooled down through the second flow channel 42 and then replenished into the second water storage unit 5; the first water path 7 connects the first water storage unit 2 and the second water storage unit 5; the second water path 8 connects the second water storage unit 5 and the first water storage unit 2; the first water storage unit 2, the first water path 7, the second water storage unit 5 and the second water path 8 can form a circulating water path so that the water flows in a circulating manner between the first water storage unit 2 and the second water storage unit 5; the water output mechanism 6 is connected to the second water storage unit 5.

[0045] The water purifier in this application supplies purified water to the first water storage unit 2 via a purified water supply unit 1. The purified water in the first water storage unit 2 is boiled via a heating unit 3. The hot purified water in the first water storage unit 2 is then replenished into the second water storage unit 5 through a second flow channel 42. Simultaneously, the purified water supply unit 1 replenishes the first water storage unit 2 with cold purified water through a first flow channel 41 to maintain the water volume in the first water storage unit 2. During this period, the purified water replenished into the second water storage unit 5 is cooled by a heat exchange device 4, resulting in purified water at a lower temperature. This water is stored in the second water storage unit 5, which is the so-called "cooled boiled water". When the user needs purified water at a lower temperature, the water output mechanism 6 can be opened to output the purified water stored in the second water storage unit 5 at a lower temperature to supply the user. Because the second water storage unit 5 pre-stores purified water at a lower temperature, the water output mechanism 6 can maintain a relatively high purified water flow rate, avoiding the problem of insufficient flow rate. This reduces the user's waiting time for water and significantly improves the user experience. However, this also brings some new technical problems. Due to the heat dissipation of the second water storage unit 5, the "cooled boiled water" stored in it will gradually cool down with time and temperature changes, resulting in excessively low purified water temperature that makes users feel uncomfortable.

[0046] To solve the above-mentioned technical problems, such as Figure 1As shown, the purified water supply unit 1 is used to provide purified water. Alternatively, the purified water supply unit 1 may include at least a filtration system for filtering raw water to form purified water. The filtration system may have different types of filter cartridges to filter the raw water to form purified water. When the filter cartridge includes a reverse osmosis membrane cartridge, the purified water can be pure water. In other feasible embodiments, the filter cartridge may include other types of filter cartridges, such as nanofiltration membrane cartridges, ultrafiltration membrane cartridges, etc. Of course, the filtration system may include pre-filter cartridges and post-filter cartridges, etc. In another feasible embodiment, the purified water supply unit 1 may be a purified water storage unit that stores a certain amount of purified water, thereby providing purified water to the outside.

[0047] like Figure 1 As shown, the first water storage unit 2 is used to store purified water, and the heating unit 3 can heat the purified water in the first water storage unit 2 to a boiling or near-boiling temperature. For example, the first water storage unit 2 can be a tank that can store a certain amount of purified water, and it can have heat preservation properties to keep the heated purified water at a suitable temperature. The heating unit 3 can generally use any type of electric heating element available in the prior art to heat the purified water, and no limitations are imposed here.

[0048] like Figure 1 As shown, the heat exchange device 4 is used to exchange heat between two input fluids, thereby cooling the fluid with a relatively higher temperature and heating the fluid with a relatively lower temperature. The heat exchange device 4 can employ different types of heat exchangers, such as shell-and-tube heat exchangers, double-walled heat exchangers, plate heat exchangers, etc. This application does not limit the type of heat exchanger. Further, the heat exchange device includes a first heat exchange tube and a second heat exchange tube passing through the first heat exchange tube. One of the first flow channel 41 and the second flow channel 42 is formed inside the second heat exchange tube, and the other of the first flow channel 41 and the second flow channel 42 is formed between the outer wall of the second heat exchange tube and the inner wall of the first heat exchange tube. When a double-walled heat exchanger is selected for the heat exchange device 4, the outer tube and the inner tube of the double-walled heat exchanger form the first flow channel 41, and the inner tube forms the second flow channel 42. This method effectively improves the cooling effect on the fluid flowing through the second flow channel 42.

[0049] like Figure 1As shown, the second water storage unit 5 is connected to the first water storage unit 2 via the second flow channel 42. This allows the purified water supply unit 1 to replenish the first water storage unit 2 with cold purified water output through the first flow channel 41, while the hot purified water in the first water storage unit 2 is cooled down through the second flow channel 42 and then replenished into the second water storage unit 5. The second water storage unit 5 can be pressurized, meaning that when the purified water supply unit 1 replenishes the first water storage unit 2 with cold purified water, the hot purified water in the first water storage unit 2 is forced out and transported to the second water storage unit 5. The hot purified water in the first water storage unit 2, after being cooled down through the second flow channel 42, can form purified water with a relatively low temperature, such as a temperature that the user can drink directly, which can be called "cooled boiled water". The second water storage unit 5 can be a container capable of storing a certain amount of water, such as a water tank or a vessel. The second water storage unit 5 can have a certain heat preservation performance to prevent the temperature of the relatively low-temperature purified water stored inside from dropping further, which would result in the output purified water being too cold and uncomfortable for the user, especially in winter.

[0050] There can be one or more water output mechanisms 6, and the water output mechanism 6 is connected to the second water storage unit 5. The water output mechanism 6 can be a water outlet control valve such as a faucet, and can be electrically controlled or manually controlled.

[0051] like Figure 1 As shown, the first water channel 7 connects the first water storage unit 2 to the second water storage unit 5; the second water channel 8 connects the second water storage unit 5 to the first water storage unit 2. The first water storage unit 2, the first water channel 7, the second water storage unit 5, and the second water channel 8 form a circulating water channel, allowing water to circulate between the first water storage unit 2 and the second water storage unit 5. Through this circulating water channel, the hot purified water in the first water storage unit 2 can circulate with the purified water in the second water storage unit 5 due to the density difference. In this circulating water channel, because the density of water varies at different temperatures, when the water in the first water storage unit 2 is at a relatively high temperature, its density is relatively low; while the water in the second water storage unit 5, if at a lower temperature, has a relatively high density. This density difference causes a natural flow of water. The denser, cooler water, under the influence of gravity, flows along the second water path 8 towards the first water storage unit 2. Simultaneously, the less dense, warmer water in the first water storage unit 2 flows along the first water path 7 towards the second water storage unit 5. Therefore, the water continuously circulates between the first and second water storage units 2 and 5. This method reduces the need for a circulation pump, lowering the cost of the water purifier.

[0052] To ensure efficient circulation, the height of the second water storage unit 5 can be higher than that of the first water storage unit 2. Furthermore, when the hot purified water in the first water storage unit 2 flows into the second water storage unit 5 through the first water passage 7 due to the density difference, the water flowing through the first water passage 7 tends to extend upwards from the first water storage unit 2 towards the second water storage unit 5, minimizing downward bends in the pipe. This allows the hot purified water in the first water storage unit 2 to flow efficiently upwards through the first water passage 7 to the second water storage unit 5 due to the density difference, and the purified water in the second water storage unit 5 can also be replenished to the first water storage unit 2 through the second water passage 8.

[0053] In order to control whether the first water storage unit 2 and the second water storage unit 5 achieve convection circulation through the circulating water circuit, at least one on / off valve can be installed on the circulating water circuit.

[0054] As a feasible option, such as Figure 1 As shown, the first on / off valve 71 is installed on the first water passage 7, and the second on / off valve 81 is installed on the second water passage 8. When the water in the first water storage unit 2 and the water in the second water storage unit 5 need to circulate through the circulating water passage, both the first on / off valve 71 and the second on / off valve 81 are in the open state.

[0055] The second water storage unit 5 may have a temperature measuring unit for measuring the temperature of the purified water inside, such as... Figure 2 As shown, Figure 2 This is a schematic diagram of water flow in the second water storage unit under the heat preservation state in the first embodiment of the present invention. The water purifier has a second water storage unit 5 under heat preservation state. When the second water storage unit 5 is under heat preservation state, the temperature of the purified water in the second water storage unit 5 measured by the temperature measuring unit is lower than the preset temperature. Both the first on-off valve 71 and the second on-off valve 81 are in the open state, so that the water in the first water storage unit 2 and the water in the second water storage unit 5 form a circulating flow through the circulation water circuit. Through the above structure, it can be ensured that the purified water in the second water storage unit 5 is maintained above the preset temperature, avoiding the purified water in the second water storage unit 5 from dropping to too low a temperature over time, resulting in the output purified water being too cold and uncomfortable for the user.

[0056] As a feasible option, such as Figure 1As shown, the water output mechanism 6 is installed on either the first water passage 7 or the second water passage 8. For example, the water output mechanism 6 is installed on the first water passage 7, and the purified water from the first water passage 7 flows through the water output mechanism 6 to sterilize the water outlet 64 in the water output mechanism 6. That is, when the second water storage unit 5 is in the heat preservation state, the hot purified water flowing out of the first water storage unit 2 through the first water passage 7 flows through the water output mechanism 6, thereby heating some components in the water output mechanism 6 to a higher temperature, and then flowing into the second water storage unit 5. In this process, the high temperature can be used to sterilize the water outlet 64 in the water output mechanism 6. Since the water output mechanism 6 outputs purified water at a relatively low temperature during normal use, bacteria can easily grow on the water output mechanism 6, and the low-temperature purified water flowing out at the outlet cannot sterilize the water output mechanism 6 at high temperature. The purified water flowing through the first water passage 7 through the water output mechanism 6 can achieve sterilization of the water outlet 64 of the water output mechanism 6. Of course, the water output mechanism 6 can also be installed on the second water passage 8.

[0057] As a feasible option, Figure 3 This is a schematic diagram of the water purifier in the second embodiment of the present invention, as shown below. Figure 3 As shown, the water purifier may further include: a third water path 9, through which the first water storage unit 2 is connected to the second water storage unit 5; a fourth water path 10, through which the outlet of the purified water supply unit 1 is connected to the first water storage unit 2; the purified water supply unit 1 includes a booster pump 13, when the booster pump 13 is started, the purified water supply unit 1 can output cold purified water that flows into the first water storage unit 2 through the fourth water path 10, and the hot purified water in the first water storage unit 2 flows into the second water storage unit 5 from the third water path 9.

[0058] As a feasible option, such as Figure 3 As shown, the water output mechanism 6 is installed on the third water passage 9. Hot purified water from the first water storage unit 2 flows through the water output mechanism 6 to sterilize the water outlet section of the water output mechanism 6. A third on / off valve 91 is installed on the third water passage 9, and a fourth on / off valve 101 is installed on the fourth water passage 10.

[0059] Figure 4 This is a schematic diagram of the water flow in the sterilization state of the water purifier in the second embodiment of this utility model. Figure 4 As shown, the water purifier has a sterilization state. In the sterilization state, the booster pump 13, the third on / off valve 91, and the fourth on / off valve 101 are in the open state, so that when the water supply unit 1 outputs cold purified water to the first water storage unit 2 through the fourth water passage 10, the hot purified water in the first water storage unit 2 is supplied to the second water storage unit 5 through the third water passage 9, so that the hot purified water in the first water storage unit 2 flows through the water output mechanism 6 to sterilize the water outlet in the water output mechanism 6.

[0060] In one feasible implementation Figure 5 This is a cross-sectional structural diagram of the water output mechanism in an embodiment of this utility model, as shown below. Figure 5 As shown, the water output mechanism 6 may include: a first port 61, a second port 62, and a flow channel 63 connecting the first port 61 and the second port 62 respectively; a water outlet 64, in which a water outlet flow channel 641 is formed, and at least a portion of the flow channel 63 contacts at least a portion of the outer wall of the water outlet 64; an on / off control module 65, which controls the on / off connection between the water outlet flow channel 641 and the flow channel 63; the water output mechanism 6 is connected to a third water path 9 through the first port 61 and the second port 62. The hot purified water flowing through the third water path 9 can heat the water outlet 64 to a higher temperature when it flows through the flow channel 63 of the water output mechanism 6, thereby sterilizing the water outlet flow channel 641 formed by the water outlet 64.

[0061] As a feasible option, such as Figure 1 and Figure 3 As shown, the water purifier includes a drain water passage 11 with a fifth shut-off valve 111, which is connected to the first water storage unit 2. When it is necessary to drain the first water storage unit 2, the fifth shut-off valve 111 can be opened to drain all the water in the first water storage unit 2 through the drain water passage 11. The drain water passage 11 can be connected to the bottom of the first water storage unit 2 to ensure that the water in the first water storage unit 2 can be easily drained.

[0062] As a feasible option, such as Figure 3 As shown, the second waterway 8 and the third waterway 9 have at least a portion of the first overlapping waterway, and the water output mechanism 6 is set on the first overlapping waterway; the second waterway 8 and the fourth waterway 10 have at least a portion of the second overlapping waterway. By sharing the portion of the overlapping waterway between the second waterway 8 and the third waterway 9, and the second waterway 8 and the fourth waterway 10 sharing the portion of the overlapping waterway, it is beneficial to reduce the cost of using water pipes.

[0063] As a feasible option, such as Figure 3 As shown, the water purifier also includes a fifth water path 12. The outlet of the first flow channel 41 is connected to the inlet of the first water storage unit 2 through the fifth water path 12. The second water path 8 and the fifth water path 12 have at least a partial third overlapping water path. By sharing the partial overlapping water path between the second water path 8 and the fifth water path 12, it is beneficial to reduce the cost of using water pipes.

[0064] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified element, component, part, or step, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute “may” include is optional. Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The disclosure of “a” or “an” used to describe an element, component, part, or step does not imply exclusion of other elements, components, parts, or steps.

[0065] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A water purifier, characterized in that, The water purifier includes: Water purification supply unit; A first water storage unit and a heating unit for heating the purified water in the first water storage unit; Second water storage unit; A heat exchange device having a first flow channel and a second flow channel that enable heat exchange of a flowing liquid, wherein the inlet of the first flow channel is connected to the outlet of the purified water supply unit, the outlet of the first flow channel is connected to the inlet of the first water storage unit, the inlet of the second flow channel is connected to the outlet of the first water storage unit, and the outlet of the second flow channel is connected to the inlet of the second water storage unit. The first waterway connects the first water storage unit to the second water storage unit. The second water channel connects the second water storage unit to the first water storage unit. The first water storage unit, the first water channel, the second water storage unit, and the second water channel can form a circulating water channel so that the water flows in a circulating manner between the first water storage unit and the second water storage unit. A water output mechanism, which is connected to the second water storage unit.

2. The water purifier according to claim 1, characterized in that, When the hot purified water in the first water storage unit can flow into the second water storage unit through the first water passage due to the density difference, the purified water in the second water storage unit flows into the first water storage unit through the second water passage.

3. The water purifier according to claim 2, characterized in that, The height of the second water storage unit is higher than that of the first water storage unit.

4. The water purifier according to claim 3, characterized in that, When the hot purified water in the first water storage unit flows into the second water storage unit through the first water path due to the density difference, the water flowing through the first water path tends to extend upward from the first water storage unit toward the second water storage unit.

5. The water purifier according to claim 1, characterized in that, At least one on / off valve is installed in the circulating water circuit.

6. The water purifier according to claim 5, characterized in that, A first on / off valve is installed on the first water line, and a second on / off valve is installed on the second water line.

7. The water purifier according to claim 5, characterized in that, The water output mechanism is located on the first waterway or the second waterway.

8. The water purifier according to claim 1, characterized in that, The water output mechanism is located on the second water path.

9. The water purifier according to claim 7 or 8, characterized in that, The water output mechanism includes: A first port, a second port, and flow channels connecting the first port and the second port respectively; A water outlet section, wherein a water outlet channel is formed within the water outlet section, and at least a portion of the water outlet channel is in contact with at least a portion of the outer wall of the water outlet section; An on / off control module controls the connection and disconnection between the outlet channel and the through channel; The water output mechanism is connected to the second waterway through the first port and the second port.

10. The water purifier according to claim 1, characterized in that, The water purifier also includes: The third waterway connects the first water storage unit to the second water storage unit. The fourth water channel connects the outlet of the purified water supply unit to the first water storage unit. The purified water supply unit includes a booster pump. When the booster pump is started, the purified water supply unit can output cold purified water and flow into the first water storage unit through the fourth water path. At the same time, the hot purified water in the first water storage unit flows into the second water storage unit through the third water path.

11. The water purifier according to claim 10, characterized in that, The water output mechanism is located on the third waterway.

12. The water purifier according to claim 11, characterized in that, The hot purified water in the first water storage unit flows through the water output mechanism to sterilize the water outlet section of the water output mechanism.

13. The water purifier according to claim 12, characterized in that, A third on / off valve is installed on the third water line, and a fourth on / off valve is installed on the fourth water line.

14. The water purifier according to claim 12, characterized in that, The water purifier also includes: A drain water path with a fifth shut-off valve is provided, and the drain water path is connected to the first water storage unit.

15. The water purifier according to claim 10, characterized in that, The second waterway and the third waterway have at least a partial overlap with the first waterway.

16. The water purifier according to claim 15, characterized in that, The water output mechanism is located on the first overlapping water path.

17. The water purifier according to claim 10, characterized in that, The second waterway and the fourth waterway have at least a partial second overlapping waterway.

18. The water purifier according to claim 1, characterized in that, The water purifier also includes a fifth water channel, and the outlet of the first flow channel is connected to the inlet of the first water storage unit through the fifth water channel. The second water channel and the fifth water channel have at least a partial third overlapping water channel.

19. The water purifier according to claim 6, characterized in that, The second water storage unit has a temperature measuring unit for measuring the temperature of the purified water inside it; The water purifier has a second water storage unit in a heat preservation state. When the second water storage unit is in a heat preservation state, the temperature of the purified water in the second water storage unit measured by the temperature measuring unit is lower than the preset temperature. The first on-off valve and the second on-off valve are in the open state, so that the water in the first water storage unit and the water in the second water storage unit form a circulating flow through the circulating water circuit.

20. The water purifier according to claim 13, characterized in that, The water purifier has a sterilization mode. In the sterilization mode, the booster pump, the third on / off valve, and the fourth on / off valve are in the open state, so that the hot purified water in the first water storage unit flows through the water output mechanism to sterilize the water outlet in the water output mechanism.

21. The water purifier according to claim 1, characterized in that, The heat exchange device includes a first heat exchange tube and a second heat exchange tube passing through the first heat exchange tube. One of the first flow channel and the second flow channel is formed inside the second heat exchange tube, and the other of the first flow channel and the second flow channel is formed between the outer side wall of the second heat exchange tube and the inner side wall of the first heat exchange tube.

22. The water purifier according to claim 1, characterized in that, There are multiple water output mechanisms, each of which is independently connected to the second water storage unit.

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