Water purifier suitable for multi-source heating

Abstract

The application discloses a water purifier suitable for multi-water source heating, which comprises a main machine and a faucet assembly. The main machine is internally provided with a filtering unit and a heating body. The faucet assembly comprises a shell and a purified water outlet pipeline. The water outlet of the heating body is communicated with the purified water outlet pipeline. The main machine is internally provided with a reversing valve. The faucet assembly is integrated with an external water source access pipeline. One end of the external water source access pipeline is externally connected with an external interface exposed to the shell. The other end of the external water source access pipeline penetrates through the bottom of the shell and extends towards the main machine. The water outlet end of the filtering unit and the extended end of the external water source access pipeline are respectively communicated with two independent water inlets of the reversing valve. The water outlet of the reversing valve is communicated with the water inlet of the heating body through a water pump. The application realizes flexible switching of the filtered water and the external water source to the heating body by integrating the external water source access pipeline with the faucet assembly and cooperating with the reversing valve in the main machine.

Description

Technical Field

[0001] This application relates to the field of drinking water treatment equipment technology, specifically to a water purifier suitable for heating multiple water sources. Background Technology

[0002] With the improvement of living standards, water purifiers with heating functions have been widely used in homes and offices. They usually consist of an under-sink main unit and an over-sink water purifier faucet. The main unit integrates a filtration unit (such as an RO reverse osmosis filter) and a heating element (instantaneous or storage type). The filtration unit filters tap water into purified water that meets drinking standards. After the purified water enters the heating element and is heated, it is discharged through the water outlet pipe in the faucet. While this structural design can operate stably under normal water supply conditions, it still has some shortcomings in actual use: there is a risk of dependence on a single tap water source, which means that hot water cannot be provided when the tap water supply fails. For example, when the tap water supply is interrupted (such as during pipeline repairs or water outages), the filter unit cannot work due to the lack of water supply, and the heating element also loses its water supply, resulting in users being unable to obtain hot water, which seriously affects daily use, especially in emergency scenarios (such as preparing formula for infants or administering medication to patients), posing a potential safety hazard. If the tap water quality suddenly deteriorates (such as due to pipe pollution or excessive sediment), the filter unit may fail due to overload or even clog the filter element, not only failing to provide qualified purified water but also potentially causing the heating element to burn dry due to lack of water, posing a safety hazard.

[0003] Some existing technologies attempt to alleviate water outages by adding water storage tanks, but the capacity of the water storage tanks is limited and cannot meet the needs of long-term water outages. In addition, stored water is prone to bacterial growth, which affects water quality. Another solution proposes to set up a backup water source interface in the main unit, but the interface is usually integrated on the side or bottom of the main unit and separated from the faucet. This means that when an external water source is connected, additional pipes need to be laid, which is cumbersome to install and affects the aesthetics.

[0004] To address the aforementioned issues, there is an urgent need for a water purifier that can quickly switch to an external water source to continue providing hot water when tap water is interrupted or the water quality is abnormal. At the same time, it must be compact in structure, easy to install, and not affect the normal use of the original filtration and heating functions. Utility Model Content

[0005] The purpose of this application is to provide a water purifier suitable for heating multiple water sources, which aims to solve the problem of quickly switching to an external water source to continuously supply hot water when the tap water is abnormal, and to achieve convenient access to the external water source through an integrated external interface on the faucet.

[0006] The technical solution adopted in this application is as follows:

[0007] A water purifier suitable for heating multiple water sources includes a main unit and a faucet assembly. The main unit contains a filter unit and a heating element. The faucet assembly includes a housing and a purified water outlet pipe. The outlet of the heating element is connected to the purified water outlet pipe. The main unit contains a reversing valve. The faucet assembly integrates an external water source inlet pipe. One end of the external water source inlet pipe has an external interface exposed to the housing, and the other end passes through the bottom of the housing and extends towards the main unit. The outlet of the filter unit and the extended end of the external water source inlet pipe are respectively connected to the two independent inlets of the reversing valve. The outlet of the reversing valve is connected to the inlet of the heating element through a water pump.

[0008] This technical solution integrates an external water source inlet pipe into the faucet assembly and, in conjunction with a reversing valve within the main unit, enables flexible switching between filtered water and external water sources (such as bottled water). When the main water source (such as tap water) is normal, the filtered purified water is used for heating. When the main water source is interrupted or the water quality is abnormal, the user can directly connect an external water source at the external interface and switch the connection to the external water source via the reversing valve, ensuring a continuous supply of heated purified water and guaranteeing the heating function's continuous availability. This significantly improves the adaptability and reliability of the water purifier, solving the downtime problem caused by a single water source failure in traditional water purifiers. Furthermore, the integration of the external water source inlet pipe into the faucet assembly avoids occupying under-sink space and facilitates countertop operation, greatly enhancing ease of use.

[0009] The external water source access pipeline has a split structure, including a rigid pipe fixed to the housing and a connecting pipe connecting the rigid pipe to the host; the external interface is located at the upper end of the rigid pipe, and the lower end of the rigid pipe passes through the bottom of the housing and is connected to the connecting pipe.

[0010] In this technical solution, the split-type structural design allows the external water source inlet pipe to be separated into a rigid pipe and a connecting pipe, which facilitates production and installation. The rigid pipe is fixed to the faucet housing to provide a stable external interface, ensuring the stability of the connection between the rigid pipe and the external water source pipe. The connecting pipe can be a flexible hose or a rigid pipe, which can be adjusted according to the actual installation environment, enhancing the product's flexibility and versatility.

[0011] The rigid pipe includes a horizontal pipe section and a vertical pipe section. The housing is provided with a through hole. The horizontal pipe section is exposed through the through hole and fixed to the housing by fasteners.

[0012] In this technical solution, the connection between the horizontal and vertical pipe sections forms an L-shaped structure for the entire rigid pipe. This allows for full utilization of the internal space of the faucet to optimize the layout. The horizontal pipe section extends horizontally through the shell and is then exposed to form an external interface. The vertical pipe section passes through the bottom of the shell, ensuring convenient access to external water sources and shortening the connection distance to the main unit through vertical extension. This reduces pipe resistance and heat loss, thereby improving system efficiency.

[0013] The transverse pipe section is provided with external threads, the fastener is provided as a lock nut, and the outer end of the through hole is provided with a circumferentially extended abutment plane for abutting against the lock nut screwed into the external threads.

[0014] In this technical solution, the transverse pipe section uses an external thread and a lock nut, combined with the design of the contact plane, to achieve a firm connection between the rigid pipe and the shell, and facilitate maintenance and replacement.

[0015] The housing is equipped with a clamping ring, and the vertical pipe section is clamped into the clamping ring to form a radial limit.

[0016] In this technical solution, the radial limiting effect of the clamping ring prevents the rigid pipe from shaking or shifting during use, especially when connecting or disconnecting external water sources. This ensures the relative position stability of the rigid pipe and the casing, extends the pipe life, and reduces the risk of loosening due to vibration. Furthermore, during installation, the clamping ring can be used to pre-position the vertical sections of the rigid pipe, providing structural support for the engagement of the horizontal pipe sections with the lock nut.

[0017] The faucet assembly includes a water outlet faucet, the housing is configured as a vertically extending support tube, and the water outlet faucet is connected to the top of the support tube.

[0018] In this technical solution, the faucet shell is designed as a vertical support pipe, which serves as both the installation carrier for the external water source access pipe and the structural support for the faucet, achieving multi-functional integrated design. Moreover, compared to exposing the external interface of the external water source access pipe through the faucet, exposing it through the support pipe can reduce the overall height, shorten the distance between it and the main unit, and facilitate assembly.

[0019] The reversing valve is an electromagnetic reversing valve; or, the reversing valve is a manual reversing valve, and the control terminal of the manual reversing valve is provided with a switching switch, which is located outside the main unit or outside the faucet assembly.

[0020] In this technical solution, when the reversing valve is an electromagnetic reversing valve, it realizes automatic water source switching and can be integrated with the water purifier control system to automatically switch the water circuit according to the water circuit control signal; when the reversing valve is a manual reversing valve, it can still be operated through an external switching switch in the event of power failure or electronic system failure. The switching switch is located on the main unit or faucet, which is convenient for users to directly access and operate, reducing the failure rate and saving energy.

[0021] The main unit is equipped with a first water circuit board, which has a return water circuit and a heating water circuit. The return water circuit is connected to the clean water outlet and the water inlet of the filter unit. A check valve is connected to the return water circuit to ensure unidirectional flow from the clean water outlet to the water inlet of the filter unit. The heating water circuit is connected to the water outlet of the filter unit and the water pump. A reversing valve is connected to the heating water circuit, and a pressure reducing valve is connected upstream of the reversing valve in the heating water circuit.

[0022] In this technical solution, the return water circuit design of the first water circuit plate realizes the self-circulation flushing of the filter unit, the check valve ensures unidirectional flow, and the pressure reducing valve ensures that the water pressure entering the heating element is stable, so as to avoid the heating effect or damage to the equipment due to water pressure fluctuations.

[0023] The main unit is equipped with a second water circuit board, and the water pump is installed on the second water circuit board. The second water circuit board is equipped with a wastewater discharge water circuit, a raw water inlet water circuit, and a normal temperature water outlet water circuit. The wastewater outlet of the filter unit is connected to the wastewater discharge water circuit, and a wastewater valve is connected to the wastewater discharge water circuit. The raw water inlet water circuit is connected to the inlet of the filter unit, and an inlet valve is connected to the raw water inlet water circuit. The purified water outlet of the filter unit is connected to the purified water outlet pipe through the normal temperature water outlet water circuit, and an outlet valve is connected to the normal temperature water outlet water circuit.

[0024] In this technical solution, the second water circuit board integrates multiple functional water circuits, controlling raw water inlet, wastewater discharge, and ambient temperature water outlet through different valves. The modular design reduces pipe connection points, lowers the risk of leakage, and facilitates production assembly and troubleshooting.

[0025] The main unit is equipped with an internal inlet pipe and a hot water outlet pipe. The internal inlet pipe connects the reversing valve to the external water source inlet pipe, and the hot water outlet pipe connects the heating element to the purified water outlet pipe. The raw water inlet pipe, the ambient temperature water outlet pipe, the wastewater discharge pipe, the internal inlet pipe, and the hot water outlet pipe are respectively provided with raw water inlet interface, ambient temperature water outlet interface, wastewater discharge interface, external water source inlet and hot water outlet interface exposed to the main unit.

[0026] In this technical solution, the design of each exposed interface standardizes the connection between the host and external equipment (such as water sources and drainage systems), facilitating installation and maintenance. In particular, it facilitates the coordination between external water source inlets and internal access pipelines. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0028] Figure 1 The water circuit principle of the water purifier applicable to multi-source water heating provided in the embodiments of this application Figure 1 ;

[0029] Figure 2 The water circuit principle of the water purifier applicable to multi-source water heating provided in the embodiments of this application Figure 2 ;

[0030] Figure 3 A partial cross-sectional view of the faucet assembly provided in an embodiment of this application;

[0031] Figure 4 A partial enlarged cross-sectional view of the faucet assembly provided in an embodiment of this application;

[0032] Figure 5 This is a schematic diagram of the rigid tube structure provided in an embodiment of this application;

[0033] Figure 6 A schematic diagram of the upper tube of the housing provided in an embodiment of this application;

[0034] Figure 7 A schematic diagram of the bottom liner of the housing provided in an embodiment of this application;

[0035] Figure 8 The internal assembly of the main unit of the water purifier applicable to multi-source water heating provided in the embodiments of this application is as follows: Figure 1 ;

[0036] Figure 9 The internal assembly of the main unit of the water purifier applicable to multi-source water heating provided in the embodiments of this application is as follows: Figure 2 ;

[0037] Figure 10 This is an assembly drawing of the first water circuit board, check valve, pressure reducing valve, and directional valve provided in the embodiments of this application;

[0038] Figure 11 This is a schematic diagram of the host structure provided in an embodiment of this application.

[0039] List of components and reference numerals:

[0040] 1 host computer;

[0041] 2. Faucet assembly, 21. Housing, 211. Through hole, 212. Abutting plane, 213. Clamping ring, 214. Upper pipe body, 215. Bottom lining, 22. Clean water outlet pipe, 23. External water source inlet pipe, 231. Rigid pipe, 2311. Horizontal pipe section, 2312. Vertical pipe section, 24. Faucet.

[0042] 3 filtration units, 31 booster pump, 32 filter element;

[0043] 4. Reversing valve;

[0044] 5 water pumps;

[0045] 6. Lock nuts;

[0046] 7 First water circuit board, 71 Return water circuit, 72 Heating water circuit;

[0047] 8 check valve;

[0048] 9 Second water circuit board, 91 Wastewater discharge water circuit, 911 Wastewater discharge interface, 92 Raw water inlet water circuit, 921 Raw water inlet interface, 93 Normal temperature water outlet water circuit, 931 Normal temperature water outlet interface;

[0049] 10 Wastewater valves;

[0050] 20 Inlet Valve;

[0051] 30 Water outlet valve;

[0052] 40TDS test piece;

[0053] 50 Second check valve;

[0054] 60 Internal access piping, 601 External water source inlet;

[0055] 70 hot water outlet pipe, 701 hot water outlet interface;

[0056] 80 heating element;

[0057] 90 External water sources;

[0058] 100 pressure reducing valve. Detailed Implementation

[0059] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0060] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0061] Furthermore, it should be understood in the description of this application that the terms "upper," "lower," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "lateral," and "longitudinal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0062] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0063] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0064] In the embodiments of this application, reference is made to Figures 1 to 11 As shown, a water purifier suitable for heating multiple water sources is provided. For ease of explanation and understanding, the following content provided in this application is based on the illustrated product structure. Of course, those skilled in the art will understand that the above structure is only a specific example and illustrative illustration, and does not constitute a specific limitation on the technical solution provided in this application.

[0065] like Figure 1 , Figure 8 , Figure 9 and Figure 11 As shown, the water purifier includes a main unit 1 and a faucet assembly 2. The main unit 1 is equipped with a filter unit 3 and a heating element 80. The faucet assembly 2 includes a housing 21 and a purified water outlet pipe 22. The outlet of the heating element 80 is connected to the purified water outlet pipe 22. The main unit 1 is equipped with a reversing valve 4. The faucet assembly 2 integrates an external water source inlet pipe 23. One end of the external water source inlet pipe 23 has an external interface exposed outside the housing 21, and the other end passes through the bottom of the housing 21 and extends toward the main unit 1. The outlet of the filter unit 3 and the extension end of the external water source inlet pipe 23 are respectively connected to the two independent inlets of the reversing valve 4. The outlet of the reversing valve 4 is connected to the inlet of the heating element 80 through a water pump 5. Figure 1The diagram schematically illustrates the connection between the external water source access pipe 23 and the external water source 90 (such as bottled water).

[0066] like Figure 1 and Figure 2 The diagram shown is a water circuit schematic of a preferred embodiment of the water purifier of this application. In this embodiment, the filtration unit 3 includes a booster pump 31 and a filter element 32 (such as a reverse osmosis filter element or a composite filter element containing a reverse osmosis filter element) connected to the outlet of the booster pump 31. The heating element 80 can be an instant heating element or a storage heating element. The inlet pipe where the inlet valve 20 is located can be connected to a tap water faucet. (Refer to...) Figure 1 The arrows represent the water flow path. When the tap and inlet valve 20 are opened, tap water is pressurized by the booster pump 31 and enters the filter element 32 for filtration. The reversing valve 4 switches to the state where the filter element 32 and the water pump 5 are connected. The purified water can enter the heating element 80 through the reversing valve 4 and the water pump 5 for heating. The heated hot water is discharged from the tap assembly 2 through the purified water outlet pipe 22. In this application, by integrating the external water source access pipe 23 into the tap assembly 2 and cooperating with the reversing valve 4 in the main unit 1, flexible switching between filtered water and external water source 90 is achieved. When the main water source (such as tap water) used to supply water to the filter element 32 is normal, the filtered purified water is used for heating; see reference. Figure 2 The arrows indicate the water flow path. When the main water source is interrupted or the water quality is abnormal, the user can directly connect the external water source 90 at the external interface and switch the connection to the external water source 90 through the reversing valve 4. The external water source 90 can flow through the external water source inlet pipe 23 and the reversing valve 4 under the suction of the water pump 5, and then enter the heating element 80 for heating. The heated hot water is discharged from the faucet assembly 2 through the purified water outlet pipe 22, ensuring the supply of heated purified water at the faucet assembly 2 and ensuring that the heating function is continuously available. This significantly improves the adaptability and reliability of the water purifier and solves the problem of shutdown caused by the failure of a single water source in traditional water purifiers. At the same time, the external water source inlet pipe 23 is integrated into the faucet assembly 2, avoiding the occupation of under-sink space and facilitating tabletop operation, greatly improving the convenience of use.

[0067] Regarding the structure of the external water source access pipe 23, in a preferred embodiment, as follows: Figure 3 and Figure 4As shown, the external water supply pipe 23 has a split structure, including a rigid pipe 231 fixed to the housing 21 and a connecting pipe connecting the rigid pipe 231 to the main unit 1. The external interface is located at the upper end of the rigid pipe 231, and the lower end of the rigid pipe 231 passes through the bottom of the housing 21 and connects to the connecting pipe. The split structure design allows the external water supply pipe 23 to be separated into the rigid pipe 231 and the connecting pipe, which facilitates production and installation. For example, during assembly, the rigid pipe 231 and the connecting pipe can be separated first, then the rigid pipe 231 can be installed in place on the housing 21, and then the connecting pipe can be connected to the rigid pipe 231 and the main unit 1 respectively. The rigid pipe 231 fixed to the faucet housing 21 provides a stable external interface, ensuring the stability of the connection between the rigid pipe 231 and the external water supply pipe. Although the attached figure does not show the connecting pipe, it can be a flexible pipe or a rigid pipe, which can be adjusted according to the actual installation environment, enhancing the flexibility and versatility of the product. More preferably, the rigid tube 231 can be a metal tube such as a copper tube, aluminum tube, or alloy tube, or it can be a rigid plastic tube. Furthermore, to facilitate connection, the connecting tube is preferably a flexible tube, such as a silicone flexible tube or other suitable flexible tube.

[0068] In a preferred embodiment, such as Figures 3 to 5 As shown, the rigid tube 231 includes a horizontal tube section 2311 and a vertical tube section 2312. The housing 21 is provided with a through hole 211. The horizontal tube section 2311 is exposed outside the housing 21 through the through hole 211 and is fixed by fasteners. During processing and manufacturing, the inner contour dimensions of the housing 21 need to meet the dimensional requirements for inserting the rigid tube 231. During assembly, the rigid tube 231 is inserted into the housing 21 as a whole, so that the horizontal tube section 2311 is aligned with the through hole 211 and passes through it. After passing through, it is fixed by fasteners, while the vertical tube section 2312 passes through the bottom of the housing 21 and connects with the connecting pipe. The connection between the horizontal pipe section 2311 and the vertical pipe section 2312 makes the rigid pipe 231 form an L-shaped structure, which can make full use of the internal space of the faucet to optimize the layout. The horizontal pipe section 2311 extends horizontally out of the shell 21 and is exposed to form an external interface. The vertical pipe section 2312 passes through the bottom of the shell 21, which not only ensures the convenience of external water source access, but also shortens the connection distance with the main unit 1 by utilizing vertical extension, reducing pipe resistance and heat loss, and improving system efficiency.

[0069] Regarding the connection method between the transverse pipe section 2311 and the fastener, preferably, as follows: Figure 4 and Figure 6As shown, the transverse pipe section 2311 is provided with external threads, and the fastener is a lock nut 6. The outer end of the through hole 211 is provided with a circumferentially extending abutment surface 212 for abutting against the lock nut 6 screwed into the external threads. The transverse pipe section 2311, with its external threads and lock nut 6, combined with the design of the abutment surface 212, achieves a firm connection between the rigid pipe 231 and the housing 21, and facilitates maintenance and replacement. As another alternative embodiment, the transverse pipe section can also be provided with a flange, and screws can be used to fix it to the housing through the flange. In addition, other suitable connection schemes can be selected for the transverse pipe section and the fastener, which are not limited here.

[0070] More preferably, such as Figure 7 As shown, the housing 21 has a clamping ring 213 inside, and the vertical pipe section 2312 is clamped in the clamping ring 213 to form a radial limit, preventing the rigid pipe 231 from shaking or shifting during use. Especially when connecting or disconnecting external water sources, it ensures the relative position of the rigid pipe 231 and the housing 21 is stable, extending the pipeline life and reducing the risk of loosening due to vibration. Moreover, during installation, the clamping ring 213 can be used to pre-position the vertical pipe section 2312 of the rigid pipe 231, providing structural support for the engagement of the horizontal pipe section 2311 and the locking nut 6. Specifically, the clamping ring 213 can be made of a resilient metal or plastic structure, and the clamping ring 213 has a notch, allowing the vertical pipe section 2312 to be inserted radially into the clamping ring 213.

[0071] As a preferred embodiment of this application, such as Figure 3 As shown, the faucet assembly 2 includes a water outlet 24, and the housing 21 is configured as a vertically extending support tube, with the water outlet 24 connected to the top of the support tube. Specifically, the water outlet 24 constitutes the main structure of the faucet assembly 2 for accommodating the water spout and other structures. The purified water outlet pipe 22 can extend upward into the water outlet 24 and connect to the water spout. The faucet housing 21 is designed as a vertical support tube, serving both as the installation carrier for the external water source inlet pipe 23 and providing structural support for the water outlet 24, achieving multi-functional integrated design. Moreover, compared to exposing the external interface of the external water source inlet pipe 23 through the water outlet 24, exposing it on the support tube reduces the overall height, shortens the distance to the main unit 1, facilitates assembly, and places the connection structure between the external interface and the external water source at a distance from the water outlet 24, providing more space for users to collect water below the water outlet 24 and reducing spatial interference. Furthermore, the support tube can be an integrated structure or a separate structure. Figure 2 , Figure 4 , Figure 6 and Figure 7The illustration shows an embodiment where the support pipe has a split structure, including an upper pipe body 214 and a bottom liner 215. The upper pipe body 214 supports the water tap 24, and a horizontal pipe section 2311 passes through the upper pipe body 214 and the bottom liner 215. A clamping ring 213 can be provided on the inner wall of the bottom liner 215.

[0072] Regarding the reversing valve 4, this application provides the following two embodiments:

[0073] Example 1: The reversing valve 4 is an electromagnetic reversing valve, which realizes automated water source switching and can be integrated with the water purifier control system. It automatically switches the water path according to the water path control signal. The water path control signal can be output through a water pressure detection structure (such as a water pressure sensor) or a water quality detection structure (such as a water quality sensor, TDS detection device, etc.), or it can be controlled by a user-selected program. Specifically, the water pressure detection structure or water quality detection structure can be set before the booster pump 31 to detect the water pressure or water quality entering when the tap is opened. When the water pressure or water quality does not meet the requirements, the electromagnetic reversing valve is controlled to switch to the external water source. For the user-selected program control output, a program selection button can be set on the faucet assembly 2 or the main unit 1, allowing the user to select the required water source according to their needs. When the tap water filtration and heating program is selected, the electromagnetic reversing valve connects the filter element 32 and the water pump 5. When the external water source heating program is selected, the electromagnetic reversing valve connects the external water source and the water pump 5.

[0074] Example 2: The reversing valve 4 is a manual reversing valve. The control end of the manual reversing valve is equipped with a switch, which is located outside the main unit 1 or outside the faucet assembly 2. When the user receives a message about water outage or abnormal water quality, they can actively operate the switch to switch the reversing valve 4 to the state of connecting to the external water source and water pump 5. Furthermore, in the event of a power outage or electronic system failure, it can still be operated via an external switch. The switch is located externally on the main unit 1 or faucet, allowing for direct user access and operation, reducing the failure rate and saving energy.

[0075] As a preferred embodiment of this application, such as Figure 1 , Figures 8 to 10 As shown, the main unit 1 is equipped with a first water circuit board 7, which has a return water circuit 71 and a heating water circuit 72. The return water circuit 71 connects the clean water outlet and the inlet of the filter unit 3, and a check valve 8 is connected to the return water circuit 71 to ensure unidirectional flow from the clean water outlet to the inlet of the filter unit 3. The heating water circuit 72 connects the outlet of the filter unit 3 and the water pump 5, and a reversing valve 4 is connected to the heating water circuit 72. A pressure reducing valve 100 is connected upstream of the reversing valve 4 in the heating water circuit 72. Specifically, as shown... Figure 10The arrows shown represent water flow paths. The connector at the upper end of the first water circuit plate 7 can be used to connect to the outlet of the filter element 32. After entering the first water circuit plate 7, the purified water splits into two paths. One path flows to the left into the return water path 71, passes through the check valve 8, and reaches the inlet of the booster pump 31. The other path flows to the right into the heating water path 72, passes through the pressure reducing valve 100 and the reversing valve 4, and reaches the water pump 5. Under normal circumstances, under the pressure boosting action of the booster pump 31, the amount of purified water produced by the filter element 32 per unit time is greater than the amount of water required by the heating element 80. To avoid pressure buildup in the heating water path 72, under the control of the pressure reducing valve 100, a portion of the water passes through the pressure reducing valve 100, and the other portion flows back through the return water path 71. Therefore, the design of the return water path 71 of the first water circuit plate 7 realizes the self-circulation flushing of the filter unit 3. The check valve 8 ensures unidirectional flow, and the setting of the pressure reducing valve 100 ensures that the water pressure entering the heating element 80 is stable, avoiding the impact of water pressure fluctuations on the heating effect or damage to the equipment.

[0076] Furthermore, such as Figure 1 , Figure 8 , Figure 9 As shown, the main unit 1 has a second water circuit board 9, on which the water pump 5 is installed. The second water circuit board 9 has a wastewater discharge water circuit 91, a raw water inlet water circuit 92, and a normal temperature water outlet water circuit 93. The wastewater outlet of the filter unit 3 is connected to the wastewater discharge water circuit 91. Wastewater generated during the filtration process can be discharged through the wastewater discharge water circuit 91. A wastewater valve 10 is connected to the wastewater discharge water circuit 91, which controls the opening and closing of the wastewater discharge water circuit 91. The raw water inlet water circuit 92 is connected to the inlet of the filter unit 3. The raw water inlet water circuit 92 can be connected to a tap. An inlet valve 20 is connected to the raw water inlet water circuit 92, which controls the raw water inlet. The water circuit 92 is open and closed; the purified water outlet of the filter unit 3 is connected to the purified water outlet pipe 22 through the ambient temperature water outlet water circuit 93, so that the purified water produced by the filter element 32 can be heated through the heating water circuit, or directly discharged through the ambient temperature water outlet water circuit 93 and the purified water outlet pipe 22 to meet the user's demand for ambient temperature purified water. The ambient temperature water outlet water circuit 93 is connected to the outlet valve 30, which controls the opening and closing of the ambient temperature water outlet water circuit 93. The ambient temperature water outlet water circuit 93 can also be equipped with a TDS detection device 40 and a second check valve 50. The TDS detection device 40 can monitor the TDS of the produced purified water, and the second check valve 50 meets the unidirectional discharge requirement of ambient temperature purified water. In this technical solution, the second water circuit board 9 integrates multiple functional water circuits, and realizes the functions of raw water inlet, wastewater discharge, and ambient temperature water outlet through different valves. The modular design reduces the number of pipe connection points, reduces the risk of leakage, and facilitates production assembly and troubleshooting.

[0077] Furthermore, such as Figure 8 , Figure 9 and Figure 11As shown, the main unit 1 is equipped with an internal access pipe 60 and a hot water outlet pipe 70. The internal access pipe 60 is connected to the reversing valve 4 and the external water source access pipe 23. The hot water outlet pipe 70 is connected to the heating element 80 and the purified water outlet pipe 22. The raw water inlet pipe 92, the ambient temperature water outlet pipe 93, the wastewater discharge pipe 91, the internal access pipe 60, and the hot water outlet pipe 70 are respectively provided with raw water inlet interface 921, ambient temperature water outlet interface 931, wastewater discharge interface 911, external water source inlet 601, and hot water outlet interface 701 exposed to the main unit 1. The raw water inlet pipe 92 can be connected to a tap via the raw water inlet interface 921. The ambient temperature water outlet pipe 93 can be connected to the purified water outlet pipe 22 via the ambient temperature water outlet interface 931. The wastewater discharge pipe 91 can be connected to a wastewater drainage system (such as a municipal sewer) via the wastewater discharge interface 911. The internal access pipe 60 can be connected to the external water source access pipe 23 via the external water source inlet 601. The hot water outlet pipe 70 can be connected to the purified water outlet pipe 22 via the hot water outlet interface 701. The design of each exposed interface standardizes the connection between the main unit 1 and external equipment, facilitating installation and maintenance. In particular, it facilitates the coordination between the external water source inlet 601 and the internal access pipe 60.

[0078] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0079] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0080] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A water purifier suitable for heating multiple water sources, comprising a main unit and a faucet assembly, wherein the main unit contains a filter unit and a heating element, the faucet assembly includes a housing and a purified water outlet pipe, and the outlet of the heating element is connected to the purified water outlet pipe, characterized in that, The main unit is equipped with a reversing valve, and the faucet assembly integrates an external water source inlet pipe. One end of the external water source inlet pipe has an external interface exposed to the housing, and the other end passes through the bottom of the housing and extends toward the main unit. The outlet of the filter unit and the extension of the external water source access pipeline are respectively connected to the two independent inlets of the reversing valve, and the outlet of the reversing valve is connected to the inlet of the heating element through a water pump.

2. The water purifier applicable to multi-source water heating according to claim 1, characterized in that, The external water source access pipeline has a split structure, including a rigid pipe fixed to the housing and a connecting pipe connecting the rigid pipe to the host; the external interface is located at the upper end of the rigid pipe, and the lower end of the rigid pipe passes through the bottom of the housing and is connected to the connecting pipe.

3. The water purifier applicable to multi-source water heating according to claim 2, characterized in that, The rigid pipe includes a horizontal pipe section and a vertical pipe section. The housing is provided with a through hole. The horizontal pipe section is exposed through the through hole and fixed to the housing by fasteners.

4. The water purifier applicable to multi-source water heating according to claim 3, characterized in that, The transverse pipe section is provided with external threads, the fastener is provided as a lock nut, and the outer end of the through hole is provided with a circumferentially extended abutment plane for abutting against the lock nut screwed into the external threads.

5. The water purifier applicable to multi-source water heating according to claim 3, characterized in that, The housing is equipped with a clamping ring, and the vertical pipe section is clamped into the clamping ring to form a radial limit.

6. The water purifier applicable to multi-source water heating according to claim 1, characterized in that, The faucet assembly includes a water outlet faucet, the housing is configured as a vertically extending support tube, and the water outlet faucet is connected to the top of the support tube.

7. The water purifier applicable to multi-source water heating according to claim 1, characterized in that, The reversing valve is a solenoid reversing valve; or... The reversing valve is a manual reversing valve, and the control end of the manual reversing valve is equipped with a switching switch, which is located outside the main unit or outside the faucet assembly.

8. The water purifier applicable to multi-source water heating according to claim 1, characterized in that, The main unit is equipped with a first water circuit board, which has a return water circuit and a heating water circuit. The return water circuit is connected to the clean water outlet and the water inlet of the filter unit. A check valve is connected to the return water circuit to ensure unidirectional flow from the clean water outlet to the water inlet of the filter unit. The heating water circuit is connected to the water outlet of the filter unit and the water pump. A reversing valve is connected to the heating water circuit, and a pressure reducing valve is connected upstream of the reversing valve in the heating water circuit.

9. The water purifier applicable to multi-source water heating according to claim 8, characterized in that, The main unit is equipped with a second water circuit board, and the water pump is installed on the second water circuit board. The second water circuit board is equipped with a wastewater discharge water circuit, a raw water inlet water circuit, and a normal temperature water outlet water circuit. The wastewater outlet of the filter unit is connected to the wastewater discharge water circuit, and a wastewater valve is connected to the wastewater discharge water circuit. The raw water inlet water circuit is connected to the inlet of the filter unit, and an inlet valve is connected to the raw water inlet water circuit. The purified water outlet of the filter unit is connected to the purified water outlet pipe through the normal temperature water outlet water circuit, and an outlet valve is connected to the normal temperature water outlet water circuit.

10. The water purifier applicable to multi-source water heating according to claim 9, characterized in that, The main unit is equipped with an internal inlet pipe and a hot water outlet pipe. The internal inlet pipe connects the reversing valve to the external water source inlet pipe, and the hot water outlet pipe connects the heating element to the purified water outlet pipe. The raw water inlet pipe, the ambient temperature water outlet pipe, the wastewater discharge pipe, the internal inlet pipe, and the hot water outlet pipe are respectively provided with raw water inlet interface, ambient temperature water outlet interface, wastewater discharge interface, external water source inlet and hot water outlet interface exposed to the main unit.

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