Water purifier

Abstract

The invention discloses a water purifier, and relates to the technical field of water purification, the water purifier is provided with a hot water outlet, and the water purifier comprises a shell, a filter module, a hot tank and a water pump; the filtering module is arranged in the shell, and the water inlet end of the filtering module is communicated with raw water; the hot tank is arranged in the shell and used for storing hot water, and the water inlet end of the hot tank communicates with the water outlet end of the filtering module; the water pump is arranged in the shell, the water inlet end of the water pump communicates with the water outlet end of the hot tank, and the water outlet end of the water pump communicates with the hot water outlet. Wherein a connecting pipeline between the water outlet end of the water pump and the hot water outlet at least comprises a hot water pipeline, the hot tank is provided with a reflux inlet, and the hot water pipeline is communicated with the reflux inlet through a reflux pipeline. The water purifier can ensure that the temperature of hot water flowing out is stable when a user uses the water purifier next time, and the use experience of the user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification, and particularly to a water purifier. Background Art

[0002] For existing water purifiers with functions of purifying and heating water, hot water in a hot water tank is usually discharged to a water outlet through a water pump for users to use. However, when a user finishes the water intake operation and the system shuts down, an uncontrollable stagnant water area will be formed in the pipe section between the water pump outlet and the water outlet. The remaining water in this stagnant water area not only may breed bacteria and affect water quality, but also will flow out first during the next use, resulting in a deviation between the temperature of the hot water flowing out and the set temperature, greatly reducing the user experience. Summary of the Invention

[0003] The main object of the present invention is to propose a water purifier, aiming to solve the problems raised in the above background art.

[0004] To achieve the above object, the water purifier proposed by the present invention has a hot water outlet, and the water purifier includes a housing, a filtration module, a hot water tank and a water pump; the filtration module is arranged in the housing, and the water inlet end of the filtration module is communicated with raw water; the hot water tank is arranged in the housing for storing hot water, and the water inlet end of the hot water tank is communicated with the water outlet end of the filtration module; the water pump is arranged in the housing, the water inlet end of the water pump is communicated with the water outlet end of the hot water tank, and the water outlet end of the water pump is communicated with the hot water outlet; wherein, on the connection pipeline between the water outlet end of the water pump and the hot water outlet, there is at least one section of hot water pipeline, the hot water tank is provided with a return port, and the hot water pipeline and the return port are communicated through a return pipeline.

[0005] In one embodiment, the return pipeline includes a first return section and a second return section connected to each other, the first return section is connected to the hot water pipeline, and the second return section is connected to the return port.

[0006] In one embodiment, the first return section is integrally formed with the hot water pipeline.

[0007] In one embodiment, the first return section extends obliquely from one side of the hot water pipeline towards the return port.

[0008] In one embodiment, the hot water pipeline has a water flow direction, the first return section extends obliquely from one side of the hot water pipeline towards the direction of hot water flowing out, and the included angle formed between the extending direction of the first return section and the direction of hot water flowing out is an acute angle.

[0009] In one embodiment, the angle range of the acute angle is 40° - 70°.

[0010] In one embodiment, the inner diameter of the first reflux section is smaller than the inner diameter of the hot water pipeline.

[0011] In one embodiment, the second reflux section includes a connecting section and a transition section connected to each other, one end of the connecting section is connected to the first reflux section, the other end of the connecting section is connected to the transition section, and the other end of the transition section is connected to the reflux port.

[0012] In one embodiment, the outer circumferential wall of the connecting section and the inner circumferential walls of the first reflow section and the transition section are interference fit.

[0013] In one embodiment, a blocking portion is provided at the end of the first reflux section away from the hot water pipeline and at the end of the transition section away from the reflux port, and the blocking portion is an annular protruding structure.

[0014] In one embodiment, the hot water pipeline, the first reflux section and the transition section are made of a high-temperature resistant soft material, and the connection section is made of a hard material.

[0015] In one embodiment, the reflux port is opened at the top of the hot tank.

[0016] In one embodiment, a connecting column is provided on the top of the hot tank, and the connecting column is used to connect to a reflux pipeline; the reflux port is formed on the connecting column, and the connecting column is protruding from the upper surface of the hot tank.

[0017] In one embodiment, a groove is provided on the outer periphery of the connecting column.

[0018] In one embodiment, the depth of the sink is D1, and the height of the connecting column is D2, satisfying 0.8≥D1 / D2≥0.3.

[0019] In one embodiment, the connecting column forms a reflux channel, one end of the reflux channel is the reflux port, and the other end is connected to the water storage chamber inside the hot tank.

[0020] In one embodiment, the reflux channel includes a first channel and a second channel that are connected, wherein the first channel is arranged close to one end of the reflux port; and a diameter of the first channel is smaller than a diameter of the second channel.

[0021] In one embodiment, the diameter of the first channel ranges from 0.8 mm to 1.5 mm, and / or the diameter of the second channel ranges from 1.6 mm to 2.5 mm.

[0022] The water purifier of the present invention includes a housing, a filtration module, a hot water tank, and a water pump; the filtration module is arranged inside the housing, and the water inlet end of the filtration module is communicated with raw water; the hot water tank is arranged inside the housing for storing hot water, and the water inlet end of the hot water tank is communicated with the water outlet end of the filtration module; the water pump is arranged inside the housing, the water inlet end of the water pump is communicated with the water outlet end of the hot water tank, and the water outlet end of the water pump is communicated with a hot water outlet; wherein, on the connection pipeline between the water outlet end of the water pump and the hot water outlet, there is at least one section of hot water pipeline, the hot water tank is provided with a return port, and the hot water pipeline and the return port are communicated through a return pipeline. Through the setting of the return pipeline, when the water purifier stops running, the water in the connection pipeline between the water outlet end of the water pump and the hot water outlet can flow back into the hot water tank through the return pipeline, avoiding the formation of a stagnant water area, thereby preventing the remaining water from breeding bacteria and affecting the water quality. At the same time, it also ensures that the temperature of the hot water flowing out is stable during the next use, improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0024] Figure 1 It is a schematic structural diagram of an embodiment of the water purifier provided by the present invention;

[0025] Figure 2 For Figure 1 the internal structural diagram of the water purifier in;

[0026] Figure 3 For Figure 2 the partial enlarged view at A in;

[0027] Figure 4 For Figure 2 the top view of the structure in;

[0028] Figure 5 For Figure 4 the sectional view along the I-I line in;

[0029] Figure 6 For Figure 5 the partial enlarged view at B in;

[0030] Figure 7 For Figure 3 the structural diagram of the hot water pipeline and the return pipeline in;

[0031] Figure 8 For Figure 7 the top view of the structure in.

[0032] Description of Figure Numbers:

[0033] 100, water purifier; 100a, hot water outlet; 1, hot tank; 1a, water storage chamber; 11, connecting column; 11a, reflux port; 111, reflux channel; 111a, first channel; 111b, second channel; 12, trough; 2, water pump; 3, hot water pipeline; 4, reflux pipeline; 41, first reflux section; 42, second reflux section; 421, connecting section; 422, transfer section; 43, blocking part; 5, shell; 6, filter module.

[0034] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] In existing water purifiers with the functions of purifying and heating water, hot water in the hot water tank is usually discharged to the water outlet through a water pump for users to use. However, when the user finishes the water intake operation and the system shuts down, an uncontrollable stagnant water area will be formed in the pipeline section between the water pump outlet and the water outlet. The remaining water in this stagnant water area not only may breed bacteria and affect water quality, but also will flow out first during the next use, resulting in a deviation between the temperature of the hot water flowing out and the set temperature, greatly reducing the user experience.

[0039] In view of this, the present invention proposes a water purifier that can solve the aforementioned technical problems. The water purifier of the present invention can be a water dispenser, an under-sink water purifier, etc.

[0040] Please refer to Figures 1 to 3 , in an embodiment of the present invention, the water purifier 100 has a hot water outlet 100a. The water purifier 100 includes a housing 5, a filtration module 6, a hot water tank 1, and a water pump 2; the filtration module 6 is arranged in the housing 5, and the water inlet end of the filtration module 6 is communicated with raw water; the hot water tank 1 is arranged in the housing 5 for storing hot water, and the water inlet end of the hot water tank 1 is communicated with the water outlet end of the filtration module 6; the water pump 2 is arranged in the housing 5, the water inlet end of the water pump 2 is communicated with the water outlet end of the hot water tank 1, and the water outlet end of the water pump 2 is communicated with the hot water outlet 100a; wherein, on the connection pipeline between the water outlet end of the water pump 2 and the hot water outlet 100a, there is at least one section of hot water pipeline 3, the hot water tank 1 is provided with a return port 11a, and the hot water pipeline 3 and the return port 11a are communicated through a return pipeline 4.

[0041] Specifically, the water purifier 100 is equipped with a hot water outlet 100a. The core structure of the internal hot water system is the hot water tank 1 and the water pump 2. The hot water tank 1 is placed in the housing 5, and its main function is to heat and store the heated water to provide a reserve for users to take hot water later. A filtration module 6 is also arranged in the housing 5. The water inlet end of the filtration module 6 is communicated with raw water (i.e., tap water) for filtering the raw water. The filtration module 6 can include a pre-filtration, a reverse osmosis filtration, and a post-filtration device to further filter the raw water and improve water quality. The hot water tank 1 is usually made of food-grade stainless steel or high-temperature resistant plastic material to ensure the safety and stability of hot water storage. The hot water tank 1 can be set as a double-layer structure with a hollow inner layer to provide a better heat preservation effect for the hot water in the hot water tank 1.

[0042] The water pump 2 is also arranged inside the housing 5. Its water inlet end is connected to the water outlet end of the hot water tank 1 through a specific pipeline, and its water outlet end is connected to the hot water outlet 100a. Between the water inlet end of the water pump 2 and the water outlet end of the hot water tank 1, and between the water outlet end of the water pump 2 and the hot water outlet 100a, they are all connected through sealed and adapted pipelines to ensure the stable transportation of hot water between various components. The water pump 2 can be made of corrosion-resistant and high-temperature-resistant metal or high-strength engineering plastics to ensure its normal operation in a hot water environment. As for the type of the water pump 2, a diaphragm pump or a spherical pump can be selected.

[0043] Please refer to Figure 1 , the hot water tank 1 and the water pump 2 are reasonably arranged inside the housing 5. Generally, the hot water tank 1 is at the bottom or a relatively stable position to ensure the stability of the center of gravity; the water pump 2 is installed at a position close to the water outlet end of the hot water tank 1 and convenient for maintenance according to the convenience of pipeline connection and the principle of water flow dynamics. Through the pressurization of the water pump 2, the hot water stored in the hot water tank 1 can be efficiently transported to the hot water outlet 100a to meet the user's need to access hot water at any time, whether for making drinks or daily washing.

[0044] The connecting pipeline between the water outlet end of the water pump 2 and the hot water outlet 100a at least includes a section of hot water pipeline 3. The hot water pipeline 3 is generally a circular pipeline and can be made of high-temperature-resistant PPR (random copolymer polypropylene) material, which has good corrosion resistance and high-temperature resistance and can ensure the stable transportation of hot water in the pipeline. Or other materials can also be used, and no specific limitation is made in this regard.

[0045] Please refer to Figure 5 and Figure 6, the hot water tank 1 is provided with a return port 11a, and the hot water pipeline 3 and the return port 11a are connected through a return pipeline 4. The function of the return pipeline 4 is to enable the water in the connecting pipeline between the water outlet end of the water pump 2 and the hot water outlet 100a to flow back into the hot water tank 1 when the system is shut down, avoiding the formation of stagnant water areas. Of course, when the water purifier 100 is an under-sink water purifier 100, the hot water outlet 100a of the water purifier 100 is also connected to a water outlet faucet through a long pipeline. At this time, the water in the long pipeline connecting the hot water outlet 100a and the water outlet faucet will also flow back into the hot water tank 1 through the return pipeline 4, avoiding the formation of stagnant water areas, preventing the remaining water from breeding bacteria and affecting the water quality, and at the same time ensuring the stable temperature of the hot water flowing out during the next use, improving the user experience. For example, when the user stops taking water and the system is shut down, the water in the connecting pipeline between the water outlet end of the water pump 2 and the hot water outlet 100a, as well as the water in the long pipeline connecting the hot water outlet 100a and the water outlet faucet, can all flow back into the hot water tank 1 through the return pipeline 4, avoiding the formation of stagnant water areas, preventing the remaining water from breeding bacteria and affecting the water quality, and at the same time ensuring the stable temperature of the hot water flowing out during the next use, improving the user experience. One end of the return pipeline 4 is connected to the hot water pipeline 3, and the other end is connected to the return port 11a of the hot water tank 1. The connection method can select a suitable sealed connection according to the pipeline material, such as hot melt connection or sealing rubber ring connection, and no specific limitation is made on this.

[0046] The water purifier 100 of the present invention includes a housing 5, a filtration module 6, a hot water tank 1, and a water pump 2; the filtration module 6 is arranged in the housing 5, and the water inlet end of the filtration module 6 is communicated with the raw water; the hot water tank 1 is arranged in the housing 5 for storing hot water, and the water inlet end of the hot water tank 1 is communicated with the water outlet end of the filtration module 6; the water pump 2 is arranged in the housing 5, the water inlet end of the water pump 2 is communicated with the water outlet end of the hot water tank 1, and the water outlet end of the water pump 2 is communicated with the hot water outlet 100a; wherein, on the connecting pipeline between the water outlet end of the water pump 2 and the hot water outlet 100a, there is at least a section of hot water pipeline 3, the hot water tank 1 is provided with a return port 11a, and the hot water pipeline 3 and the return port 11a are connected through a return pipeline 4. Through the setting of the return pipeline 4, when the water purifier 100 is shut down, the water in the connecting pipeline between the water outlet end of the water pump 2 and the hot water outlet 100a can flow back into the hot water tank 1 through the return pipeline 4, avoiding the formation of stagnant water areas, thereby preventing the remaining water from breeding bacteria and affecting the water quality, and at the same time ensuring the stable temperature of the hot water flowing out during the next use, improving the user experience.

[0047] Please refer to Figure 3 and Figure 6 , in an embodiment, the return pipeline 4 includes a connected first return section 41 and a second return section 42, the first return section 41 is connected to the hot water pipeline 3, and the second return section 42 is connected to the return port 11a.

[0048] Specifically, the return pipeline 4 is composed of a mutually connected first return section 41 and a second return section 42. One end of the first return section 41 is connected to the hot water pipeline 3, and the connection position is usually selected at a suitable position on the hot water pipeline 3 close to the hot water tank 1. One end of the second return section 42 is connected to the return port 11a of the hot water tank 1. Both the first return section 41 and the second return section 42 are circular tubes, and their pipe diameters are determined according to actual design requirements, generally ensuring that water flow can pass through smoothly. The first return section 41 and the second return section 42 are connected in a sealed manner, such as by hot melt connection or using sealed pipe fittings, to ensure that hot water does not leak during the return process. The first return section 41 and the second return section 42 can be made of plastic materials resistant to hot water corrosion, such as PPR (random copolymer polypropylene) or high-temperature resistant rubber materials, to ensure that the water quality is not polluted. Among them, the first return section 41 starts from a certain position of the hot water pipeline 3, extends in a specific direction and then is connected to the second return section 42, and the second return section 42 extends from the connection point to the return port 11a of the hot water tank 1. Configuring the return pipeline 4 as the mutually connected first return section 41 and second return section 42, a two-section design, facilitates the connection of the return pipeline 4 with the hot water pipeline 3 and the return port 11a, and enhances the connection stability and sealing performance of the return pipeline 4 with the hot water tank 1, further improving the reliability of the remaining water return, effectively preventing the remaining water in the hot water pipeline 3 from remaining, and enhancing the performance and user experience of the water purifier 100. For example, in actual use, after multiple water intake and shutdown operations, for the water purifier 100 with this structure, there is almost no remaining water in the hot water pipeline 3, the water quality always remains good, and the hot water temperature can also be stabilized within the set range.

[0049] Please refer to Figure 7 and Figure 8 Furthermore, the first return section 41 is integrally formed with the hot water pipeline 3. Specifically, the first return section 41 and the hot water pipeline 3 adopt an integral forming process during manufacturing, and there are no splicing seams or connecting components between them, making them an inseparable overall structure with the same material and internal structure, reducing the production process, and the integrally formed structure greatly improves the sealing performance and structural strength of the connection, reducing the risk of water leakage caused by loosening or poor sealing at the connection part, and at the same time simplifying the installation and maintenance process.

[0050] Please refer to Figure 7 and Figure 8, Further, the first return section 41 extends obliquely from one side of the hot water pipe 3 towards the return port 11a. Specifically, the first return section 41 presents a shape that extends from one side of the hot water pipe 3 towards the return port 11a at an oblique angle. At the connection point with the hot water pipe 3, it is led out from the hot water pipe 3 in a smoothly transitioning manner to ensure smooth water flow. The extending direction of the first return section 41 forms a certain oblique angle with the hot water pipe 3, and the direction points to the return port 11a of the hot water tank 1. The design of the oblique extension is conducive to utilizing gravity and the natural flow trend of water, making the hot water flow more smoothly during the return process, reducing the return resistance, and improving the return efficiency.

[0051] It is worth mentioning that the hot water pipe 3 has a water flow direction. The first return section 41 extends obliquely from one side of the hot water pipe 3 towards the direction of hot water outflow, and the included angle formed between the extending direction of the first return section 41 and the direction of hot water outflow is an acute angle. Specifically, the first return section 41 is led out from one side of the hot water pipe 3, and its extending direction is arranged at an acute angle with the direction of hot water outflow in the hot water pipe 3. Please refer to Figure 8 the α shown. When the first return section 41 is connected to the hot water pipe 3, the inner wall of the connection is ensured to be smooth without affecting the normal flow and return of hot water. The first return section 41 is located on one side of the hot water pipe 3, and the oblique direction forms an acute angle with the hot water outflow direction. This design not only utilizes the flow kinetic energy of the hot water but also combines the gravity effect, enabling the hot water to utilize part of the energy of the hot water outflow during the return process, further enhancing the return power, improving the return effect, and at the same time not affecting the normal outflow of hot water. Further, the angle range of the acute angle is 40° - 70°. The angle of the acute angle α can be exemplarily 40°, 45°, 50°, 55°, 60°, 65°, 70°.

[0052] In an embodiment, the inner diameter of the first return section 41 is smaller than the inner diameter of the hot water pipe 3. Specifically, the internal diameter size of the first return section 41 is smaller than the inner diameter of the hot water pipe 3. At the connection part of the first return section 41 and the hot water pipe 3, a gradually changing pipe diameter design can be adopted to achieve smooth transition and ensure stable water flow. When hot water flows from the hot water pipe 3 into the first return section 41 with a smaller inner diameter, according to the principle of fluid continuity, the water flow velocity will increase, thereby enhancing the return power, and at the same time ensuring the normal flow rate and pressure of hot water in the hot water pipe 3 to meet the user's demand for hot water.

[0053] Please refer to Figure 3 、 Figure 7 and Figure 8In one embodiment, the second reflux section 42 includes a connecting section 421 and a transition section 422 connected to each other, one end of the connecting section 421 is connected to the first reflux section 41, the other end of the connecting section 421 is connected to the transition section 422, and the other end of the transition section 422 is connected to the reflux port 11a.

[0054] Specifically, the second reflux section 42 is composed of a connecting section 421 and a transition section 422 that are connected to each other. One end of the connecting section 421 is connected to the first reflux section 41, and the other end is connected to the transition section 422, and the other end of the transition section 422 is connected to the reflux port 11a of the hot tank 1. The connecting section 421 is connected to the first reflux section 41 and the transition section 422 by a sealing connection method, such as interference fit, glue bonding or connection using a sealing pipe fitting, to ensure the sealing and stability of the connection. The connecting section 421 can be made of hard plastic material to ensure the connection strength; the transition section 422 is made of soft plastic material that is resistant to hot water corrosion, which is easy to install and adapt to different connection angles. The connecting section 421 is in the middle position, connecting the first reflux section 41 and the transition section 422; the transition section 422 extends from the connecting section 421 to the reflux port 11a of the hot tank 1. This segmented structural design can adapt to the complex spatial layout inside the water purifier 100, ensuring that the reflux pipe 4 can smoothly connect the hot water pipe 3 and the reflux port 11a of the hot tank 1 to achieve normal reflux of hot water.

[0055] In one embodiment, the outer circumferential wall of the connecting section 421 and the inner circumferential wall of the first reflux section 41 and the transition section 422 are interference fit. Specifically, the outer circumferential wall size of the connecting section 421 is slightly larger than the inner circumferential wall size of the first reflux section 41 and the transition section 422, and a tight connection is achieved through interference fit. During assembly, the connecting section 421 is pressed forcefully into the inner circumferential wall of the first reflux section 41 and the transition section 422 so that the three fit tightly. The connecting section 421 is made of hard plastic or metal to ensure that it has sufficient strength; the first reflux section 41 and the transition section 422 are made of relatively soft hot water-resistant plastic material to facilitate interference fit. The interference fit connection method can provide good sealing, effectively prevent hot water leakage, and at the same time ensure the firmness of the connection, ensuring the stability of the reflux pipeline 4 during long-term use.

[0056] Please continue reading Figure 3 , Figure 7 and Figure 8In one embodiment, the end of the first reflux section 41 away from the hot water pipe 3 and the end of the transition section 422 away from the reflux port 11a are both provided with a blocking portion 43, and the blocking portion 43 is an annular protrusion structure. Specifically, an annular protrusion blocking portion 43 is respectively provided at one end of the first reflux section 41 away from the hot water pipe 3 and one end of the transition section 422 away from the reflux port 11a. The blocking portion 43 is an integrally formed structure with the first reflux section 41 and the transition section 422 or is fixed to the end by a firm connection. Preferably, the blocking portion 43 is an integrally formed structure with the first reflux section 41 and the transition section 422. In order to further ensure the sealing of the connection between the two ends of the first reflux section 41, the transition section 422 and the connecting section 421, a cable tie can be selected at the connection between the first reflux section 41 and the connecting section 421, and at the connection between the transition section 422 and the connecting section 421, so as to further improve the sealing effect and avoid water leakage. The blocking portion 43 provided in the form of an annular protrusion can prevent the cable tie from being displaced, thereby preventing the cable tie from being separated from the connection and causing the sealing to deteriorate.

[0057] In one embodiment, the hot water pipeline 3, the first reflux section 41 and the transition section 422 are made of a high temperature resistant soft material, and the connecting section 421 is made of a hard material. Specifically, the hot water pipeline 3, the first reflux section 41 and the transition section 422 have a certain flexibility, while the connecting section 421 is hard. The soft hot water pipeline 3, the first reflux section 41 and the transition section 422 are connected to the hard connecting section 421 through a suitable connection method to ensure the stability and sealing of the connection. The hot water pipeline 3, the first reflux section 41 and the transition section 422 are usually made of hot water resistant rubber or soft plastic; the connecting section 421 is made of hard plastic. The soft material is easy to bend and install in the complex space inside the water purifier 100, and can better adapt to different layout requirements; the hard connecting section 421 provides sufficient strength and stability to ensure the reliability of the entire reflux pipeline 4 system.

[0058] See also Figures 3 to 6 In one embodiment, the reflux port 11a is opened at the top of the hot tank 1. Specifically, the reflux port 11a is provided at the top position of the hot tank 1. The reflux port 11a is connected to the transition section 422 of the second reflux section 42 by a sealed connection method to ensure that the hot water will not leak when it refluxes. The reflux port 11a part at the top of the hot tank 1 is made of the same material as the main body of the hot tank 1, generally food-grade stainless steel or high-temperature resistant plastic. The reflux port 11a can be located at the top center of the hot tank 1 or at a suitable position close to the edge, so as to facilitate connection with the reflux pipeline 4. Setting the reflux port 11a at the top of the hot tank 1 is conducive to the natural reflux of hot water into the hot tank 1 under the action of gravity, and at the same time can avoid the precipitation of impurities that may exist at the bottom of the hot tank 1 and affect the reflux, thereby ensuring the smoothness of the reflux and the quality of the hot water.

[0059] See also Figure 2, Further, in the vertical direction, the return pipeline 4 is located above the return port 11a. Specifically, the entire return pipeline 4 is higher than the return port 11a of the hot water tank 1 in the vertical direction. The materials of the return pipeline 4 and the transition section 422 are as described above. Setting the return pipeline 4 above the return port 11a utilizes the principle of gravity, enabling hot water to flow smoothly into the hot water tank 1 by its own gravity during the return process, reducing the dependence on additional power equipment, lowering energy consumption, and effectively preventing the backflow of hot water in the hot water tank 1 to ensure the normal operation of the hot water circulation system.

[0060] Please refer to Figure 5 and Figure 6 , Furthermore, a connecting column 11 is provided at the top of the hot water tank 1, and the connecting column 11 is used to connect with the return pipeline 4; the return port 11a is formed on the connecting column 11, and the connecting column 11 protrudes above the upper surface of the hot water tank 1.

[0061] Specifically, a connecting column 11 is provided at the top of the hot water tank 1, and the connecting column 11 is used to connect with the return pipeline 4. The return port 11a is formed on the connecting column 11, and the connecting column 11 protrudes above the upper surface of the hot water tank 1, making the connection of the return pipeline 4 more convenient and stable. The connecting column 11 is generally cylindrical, which is convenient for processing and manufacturing, and can provide better sealing performance when connecting with the return pipeline 4. The connecting column 11 is usually made of the same material as the hot water tank 1, such as food-grade plastic or stainless steel, to ensure overall hygiene and corrosion resistance.

[0062] The connecting column 11 is located at the center position of the top of the hot water tank 1 or a suitable position near the edge. The specific position can be determined according to the structural design of the hot water tank 1 and the layout of the return pipeline 4, but it is necessary to ensure that the connection between the connecting column 11 and the return pipeline 4 is convenient and does not affect other functions of the hot water tank 1. One end of the return pipeline 4 is sleeved on the connecting column 11 and is sealed and connected through interference fit or sealing fittings to ensure a tight connection between the return pipeline 4 and the hot water tank 1 and prevent water leakage.

[0063] The setting of the connecting column 11 makes the connection between the return pipeline 4 and the hot water tank 1 more stable and reliable. The design of protruding above the upper surface of the hot water tank 1 facilitates the pipeline connection operation for installation and maintenance personnel, improving the efficiency of production and maintenance.

[0064] Please refer to Figure 6, Further, a sunk groove 12 is provided on the outer periphery of the connecting column 11. Specifically, a sunk groove 12 is provided on the outer periphery of the connecting column 11. The sunk groove 12 surrounds the connecting column 11 for one week and is located outside the outer wall surface of the connecting column 11. The shape of the sunk groove 12 is an annular groove, and its width and depth are designed according to actual requirements. Generally, the width is relatively uniform and the depth is appropriate. The sunk groove 12 is used to cooperate with a seal (such as a rubber sealing ring). When the return pipeline 4 is sleeved on the connecting column 11, the seal is installed in the sunk groove 12 to play a better sealing role and prevent water leakage between the return pipeline 4 and the connecting column 11. Or, if the return pipeline 4 is directly sleeved on the connecting column 11, the design of the sunk groove 12 can also play a role in circumferentially limiting the return pipeline 4.

[0065] Please refer to Figure 6 , In an embodiment, the depth of the sunk groove 12 is D1, and the height of the connecting column 11 is D2, satisfying 0.8≥D1 / D2≥0.3. Specifically, the depth of the sunk groove 12 is D1, and the height of the connecting column 11 is D2. The depth of the sunk groove 12 refers to the distance between the groove edge and the groove bottom of the sunk groove 12 in the vertical direction. The height of the connecting column 11 refers to the distance between the groove bottom of the sunk groove 12 and the end face of the connecting column 11 away from the groove bottom of the sunk groove 12 in the vertical direction.

[0066] When 0.8≥D1 / D2≥0.3 is satisfied, on the one hand, it can ensure that the return pipeline 4 and the connecting column 11 have sufficient mating length for sealing fit, and on the other hand, it also makes the height of the connecting column 11 not too high to affect the arrangement of other components or pipelines in the water purifier 100. The appropriate D1 / D2 ratio ensures that the seal can fit tightly when the connecting column 11 is connected to the return pipeline 4, enhancing the sealing of the connection and preventing water leakage. Among them, the ratio of D1 / D2 can be exemplarily 0.3, 0.4, 0.5, 0.6, 0.7 or 0.8.

[0067] Please refer to Figure 6, in one embodiment, the connecting column 11 is formed with a return channel 111. One end of the return channel 111 is a return port 11a, and the other end communicates with the water storage cavity 1a inside the hot water tank 1. Specifically, a return channel 111 is formed inside the connecting column 11. One end of this return channel 111 is the return port 11a located on the connecting column 11, and the other end communicates with the water storage cavity 1a inside the hot water tank 1 and penetrates through the connecting column 11. The shape of the return channel 111 is designed according to its internal structure and is generally circular or approximately circular to facilitate the flow of water. The two ends of the return channel 111 are respectively connected to the return port 11a and the water storage cavity 1a inside the hot water tank 1, forming a path for the return of surplus water. When the surplus water in the hot water pipeline 3 enters the return port 11a through the return pipeline 4, it can smoothly return to the inside of the hot water tank 1 through the return channel 111. The setting of the return channel 111 realizes the effective return of surplus water, avoids the residue of surplus water in the hot water pipeline 3, further guarantees the water quality, and at the same time maintains the stability of the hot water temperature, improving the user experience.

[0068] Please refer to Figure 6 , further, the return channel 111 includes a first channel 111a and a second channel 111b that are connected and communicate with each other. Among them, one end of the first channel 111a is arranged near the return port 11a; the diameter of the first channel 111a is smaller than the diameter of the second channel 111b.

[0069] Specifically, the return channel 111 includes a first channel 111a and a second channel 111b that are connected and communicate with each other. One end of the first channel 111a is arranged near the return port 11a, and the second channel 111b communicates with the water storage cavity 1a inside the hot water tank 1. Both the first channel 111a and the second channel 111b are circular channels, and the diameter of the first channel 111a is smaller than the diameter of the second channel 111b. This design forms a structure similar to a constriction. The first channel 111a is located near the return port 11a, and the second channel 111b is located near the water storage cavity 1a inside the hot water tank 1. The connection position of the two ensures the smooth flow of water. The design with the diameter of the first channel 111a smaller than the diameter of the second channel 111b makes the water flow speed up at the first channel 111a when passing through the return channel 111, forming an effect similar to jetting, which can more quickly return the surplus water to the hot water tank 1, reduce the residue time of the surplus water in the pipeline, further improve the return efficiency, and ensure the water quality and the stability of the hot water temperature.

[0070] Please continue to refer to Figure 6, Further, the length of the first channel 111a is greater than that of the second channel 111b. Specifically, the length of the first channel 111a is greater than that of the second channel 111b, and this length difference is reflected inside the return channel 111. The first channel 111a starts from one end close to the return port 11a and extends for a relatively long distance before communicating with the shorter second channel 111b. The longer first channel 111a can make better use of the speed and pressure of the water flow, enabling the water flow to maintain a relatively high flow rate when passing through the first channel 111a. After entering the second channel 111b, due to the larger diameter of the second channel 111b, the water flow speed slows down appropriately, which is conducive to the water flow entering the hot water tank 1 smoothly. By setting the length of the first channel 111a to be greater than that of the second channel 111b, the flow state of the remaining water in the return channel 111 is optimized, the return efficiency is improved, the residue of the remaining water in the hot water pipeline 3 is further reduced, and the water quality and the use effect of the hot water are ensured.

[0071] In an embodiment, the diameter range of the first channel 111a is 0.8 mm to 1.5 mm, and / or the diameter range of the second channel 111b is 1.6 mm to 2.5 mm. Specifically, the diameter range of the first channel 111a is 0.8 mm to 1.5 mm, and the diameter range of the second channel 111b is 1.6 mm to 2.5 mm. These diameter sizes define the sizes of different parts of the return channel 111. Within this diameter range, the smaller diameter of the first channel 111a can accelerate the water flow, forming a stronger driving force to quickly suck the remaining water into the return channel 111; the larger diameter of the second channel 111b can make the accelerated water flow enter the hot water tank 1 more smoothly, avoiding causing a large disturbance to the hot water inside the hot water tank 1. Among them, the diameter of the first channel 111a can be exemplarily 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm; the diameter of the second channel 111b can be exemplarily 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm.

[0072] The precise setting of the diameter range optimizes the hydrodynamic performance of the water flow in the return channel 111, improves the efficiency and stability of the remaining water return, effectively prevents the remaining water from remaining, and ensures the hot water supply quality of the water purifier 100. For example, when the diameter of the first channel 111a is 1 mm and the diameter of the second channel 111b is 2 mm, through actual tests, the remaining water return time is significantly shortened, and the hot water temperature deviation is controlled within a very small range.

[0073] The above are only exemplary embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A water purifier having a hot water outlet, characterized in that: include: case; A filter module is disposed in the housing, and a water inlet end of the filter module is in communication with raw water; A hot tank is disposed in the housing and is used to store hot water, wherein a water inlet of the hot tank is connected to a water outlet of the filter module; and A water pump is arranged in the housing, the water inlet end of the water pump is connected to the water outlet end of the hot water tank, and the water outlet end of the water pump is connected to the hot water outlet; The connecting pipeline between the water outlet of the water pump and the hot water outlet includes at least one section of hot water pipeline, the hot water tank is provided with a reflux port, and the hot water pipeline and the reflux port are connected via the reflux pipeline.

2. The water purifier according to claim 1, characterized in that The reflux pipeline includes a first reflux section and a second reflux section connected to each other, the first reflux section is connected to the hot water pipeline, and the second reflux section is connected to the reflux port.

3. The water purifier according to claim 2, characterized in that: The first reflux section and the hot water pipeline are integrally formed.

4. The water purifier according to claim 3, characterized in that: The first reflux section extends obliquely from one side of the hot water pipeline toward the reflux port.

5. The water purifier according to claim 4, characterized in that: The hot water pipeline has a water flow direction, the first reflux section extends obliquely from one side of the hot water pipeline toward the direction in which the hot water flows out, and the angle formed between the extension direction of the first reflux section and the direction in which the hot water flows out is an acute angle.

6. The water purifier according to claim 5, characterized in that The acute angle ranges from 40° to 70°.

7. The water purifier according to claim 2, characterized in that: The inner diameter of the first reflux section is smaller than the inner diameter of the hot water pipeline.

8. The water purifier according to claim 2, characterized in that: The second reflux section includes a connecting section and a transition section connected to each other, one end of the connecting section is connected to the first reflux section, the other end of the connecting section is connected to the transition section, and the other end of the transition section is connected to the reflux port.

9. The water purifier according to claim 8, characterized in that The outer peripheral wall of the connecting section and the inner peripheral walls of the first reflow section and the transition section are interference fit.

10. The water purifier according to claim 8, characterized in that The end of the first reflux section away from the hot water pipeline and the end of the transition section away from the reflux port are both provided with a blocking portion, and the blocking portion is an annular protruding structure.

11. The water purifier according to claim 8, characterized in that The hot water pipeline, the first reflux section and the transition section are made of high-temperature resistant soft materials, and the connection section is made of hard material.

12. The water purifier according to any one of claims 1 to 11, characterized in that: The reflux port is opened at the top of the hot tank.

13. The water purifier according to claim 12, characterized in that: A connecting column is provided on the top of the hot tank, and the connecting column is used to be connected to a reflux pipeline; the reflux port is formed on the connecting column, and the connecting column is protruding from the upper surface of the hot tank.

14. The water purifier according to claim 13, characterized in that A sink groove is arranged on the outer periphery of the connecting column.

15. The water purifier according to claim 14, characterized in that The depth of the sink is D1, and the height of the connecting column is D2, satisfying 0.8≥D1 / D2≥0.

3.

16. The water purifier according to claim 13, characterized in that The connecting column forms a reflux channel, one end of the reflux channel is the reflux port, and the other end is connected to the water storage cavity inside the hot tank.

17. The water purifier according to claim 16, characterized in that The reflux channel comprises a first channel and a second channel which are connected to each other, wherein the first channel is arranged close to one end of the reflux port; and a diameter of the first channel is smaller than a diameter of the second channel.

18. The water purifier according to claim 17, characterized in that The diameter of the first channel ranges from 0.8 mm to 1.5 mm, and / or the diameter of the second channel ranges from 1.6 mm to 2.5 mm.

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