RO (Reverse Osmosis) water purification equipment and external instant heating water box thereof

Abstract

The utility model relates to the technical field of RO (Reverse Osmosis) water purification equipment, provides RO water purification equipment and an external instant heating water box thereof, and aims to solve the problem of resource waste caused by replacement of an RO water purification machine with a water heating function because the conventional RO water purification machine cannot meet the hot water requirement of a user. In order to achieve the purpose, the external instant-heating water box comprises a box body, a water distributor arranged in the box body, a controller and an instant-heating heater communicating with the controller. The water distributor comprises a first interface and a second interface which are communicated with each other as well as a third interface and a fourth interface which are communicated with each other, the first interface, the second interface and the third interface are respectively used for connecting a water source, a water inlet pipe and a pure water pipe of the RO water purification equipment, and the fourth interface is connected with the instant heater; the water distributor is provided with a flow dividing pipeline connected with the third connector, and the water distributor is arranged to enable redundant water flowing into the third connector to flow to the flow dividing pipeline when the water inlet flow of the third connector is larger than the target flow of the instant heater.

Description

Technical Field

[0001] This utility model relates to the technical field of RO water purification equipment, specifically providing an RO water purification device and its external instant hot water box. Background Technology

[0002] In recent years, as people's living standards have continued to improve, they have also paid more and more attention to the health of their drinking water, and water purifiers have gradually become a common appliance in more and more households. Currently, there are two main types of household water purifiers: wall-mounted water purifiers and under-sink water purifiers, and they primarily use RO filters to filter and purify water.

[0003] However, many RO water purifiers installed in homes do not provide hot or boiling water. In daily life, people's demand for warm or hot water is constantly increasing, and existing RO water purifiers cannot meet users' hot water needs. Replacing an existing RO water purifier with one that has a hot water function would result in unnecessary waste of resources.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Utility Model Content

[0005] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem of resource waste caused by replacing existing RO water purifiers with RO water purifiers that cannot meet users' hot water needs.

[0006] In a first aspect, this utility model provides an external instant hot water box for an RO water purifier. The external instant hot water box includes a box body, a water distributor disposed within the box body, a controller, and an instant heater communicatively connected to the controller. The water distributor includes a first interface and a second interface, as well as a third interface and a fourth interface, which are connected to each other. The first interface is used to connect to a water source, the second interface and the third interface are respectively used to connect to the inlet pipe and the pure water pipe of the RO water purifier, and the fourth interface is connected to the instant heater. The water distributor is provided with a diversion pipe connected to the third interface. The water distributor is configured to direct water flowing into the third interface, exceeding the target flow rate, to the diversion pipe when the inlet flow rate of the third interface is greater than the target flow rate of the instant heater.

[0007] In the preferred embodiment of the external instant hot water box described above, the outlet end of the diversion pipe is connected to the second interface so that the water flowing out of the outlet end of the diversion pipe can flow into the RO filter element of the RO water purifier through the inlet pipe; or the outlet end of the diversion pipe is used to connect to the wastewater pipe of the RO water purifier so that the water flowing out of the outlet end of the diversion pipe can flow into the RO filter element of the RO water purifier through the wastewater pipe to flush the RO filter element.

[0008] In the preferred technical solution of the above-mentioned external instant hot water box, a one-way valve is provided on the diversion pipeline, and the one-way valve is open along the diversion pipeline in a direction away from the third interface.

[0009] In the preferred embodiment of the external instant hot water box described above, a water pump and a zero-pressure valve are also provided inside the box. The fourth interface, the zero-pressure valve, the water pump, and the instant heater are connected in series. The water pump is communicatively connected to the controller.

[0010] In the preferred technical solution of the above-mentioned external instant hot water box, a flow meter for detecting the flow of the third interface is provided inside the box, and a solenoid valve is provided on the diversion pipeline. Both the solenoid valve and the flow meter are communicatively connected to the controller.

[0011] In the preferred embodiment of the external instant hot water box described above, the water distributor includes a base, and the first interface, the second interface, the third interface and the fourth interface are formed on the base. A first flow channel, a second flow channel and a third flow channel are formed in the base. The two ends of the first flow channel are respectively connected to the first interface and the second interface. The two ends of the second flow channel are respectively connected to the third interface and the fourth interface. The water inlet end of the third flow channel is connected to the second flow channel. The third flow channel forms the diversion pipe.

[0012] In the preferred technical solution of the above-mentioned external instant hot water box, the box body also includes a room temperature water pipe, the inlet of the room temperature water pipe is connected to the fourth interface, the room temperature water pipe is equipped with a valve to adjust the on / off state of the room temperature water pipe and the fourth interface, and the valve is communicatively connected to the controller.

[0013] In the preferred technical solution of the above-mentioned external instant hot water box, the box body is provided with a first connector, a second connector, a third connector and a fourth connector. The first connector is connected to the first interface, the second connector is connected to the second interface, the third connector is connected to the third interface, and the fourth connector is connected to the outlet of the instant heater. The first connector is used to connect to a water source, the second connector and the third connector are respectively used to connect to the inlet pipe and the pure water pipe of the RO water purifier, and the fourth connector is used to connect to a faucet. The first connector, the second connector, the third connector and / or the fourth connector are quick-connect connectors.

[0014] In the preferred embodiment of the above-mentioned external instant hot water box, the external instant hot water box further includes a double-sided adhesive layer disposed on the outer surface of the box body and a protective layer covering the double-sided adhesive layer, so that the external instant hot water box can be adhered and fixed to the outer surface of the RO water purifier by means of the double-sided adhesive layer; and / or the external instant hot water box further includes a magnetic adsorption component disposed on the box body, so that the external instant hot water box can be adsorbed and fixed to the outer surface of the RO water purifier with an iron shell by means of the magnetic adsorption component.

[0015] When the above technical solution is adopted, the external instant hot water box includes a box body, a water distributor and a controller installed inside the box body, and an instant heater that is communicatively connected to the controller; the water distributor includes a first interface and a second interface connected to each other, as well as a third interface and a fourth interface connected to each other. The first interface is used to connect to a water source, the second interface and the third interface are used to connect to the inlet pipe and the pure water pipe of the RO water purifier, respectively, and the fourth interface is connected to the instant heater; the water distributor is provided with a diversion pipe connected to the third interface, and the water distributor is configured to allow the water flow exceeding the target flow of the instant heater to flow to the diversion pipe when the inlet flow of the third interface is greater than the target flow of the instant heater.

[0016] By providing an external instant hot water box, which connects to the inlet and pure water pipes of existing RO water purifiers, the pure water produced by the existing RO water purifier is heated into hot water by the instant heater in the external hot water box before flowing out to provide hot water to users. This meets users' hot water needs without requiring the replacement of existing RO water purifiers, avoiding unnecessary resource waste and reducing users' financial investment. Furthermore, the water distributor inside the external hot water box is equipped with a diversion pipe connected to a third interface. The water distributor is designed to direct excess water flowing into the diversion pipe when the inlet flow rate at the third interface exceeds the target flow rate of the instant heater. This means that the external hot water box of this invention is still applicable to RO water purifiers with large water production capacities. In other words, the external hot water box of this invention can be used with RO water purifiers of different flow rates, thereby reducing the upgrade and renovation costs of existing RO water purifiers and also reducing the development and manufacturing costs of the external hot water box.

[0017] It should be noted that the outlet of the diversion pipe can be connected to the wastewater pipe of the RO water purifier so that excess water flows through the diversion pipe to the wastewater pipe and then into the RO filter element of the RO water purifier to flush the RO filter element. Alternatively, the outlet of the diversion pipe can be connected to the second interface so that excess water flows through the diversion pipe to the second interface and then into the RO filter element of the RO water purifier through the inlet pipe.

[0018] Preferably, the outlet end of the diversion pipe is connected to the second interface so that the water flowing out of the outlet end of the diversion pipe can flow into the RO filter element of the RO water purifier through the inlet pipe.

[0019] With this setup, the pure water flowing to the inlet pipe through the diversion pipe can dilute the raw water entering the inlet pipe, reducing the concentration of calcium and magnesium ions in the water flowing to the RO filter element of the RO water purifier through the inlet pipe. This has a certain positive flushing effect on the RO membrane in the RO filter element, thereby reducing the risk of RO membrane clogging and extending the service life of the RO filter element.

[0020] The configuration of the water distributor to direct excess water flowing into the third port to the diversion pipe when the inlet flow rate exceeds the target flow rate of the instantaneous heater can be achieved as follows: A flow meter for detecting the flow rate at the third port is installed inside the housing, and a solenoid valve is installed on the diversion pipe. Both the solenoid valve and the flow meter are communicatively connected to the controller. When the flow meter detects that the flow rate at the third port exceeds the target flow rate of the instantaneous heater, the controller controls the solenoid valve to open, connecting the diversion pipe to the third port, thus allowing excess water to flow out through the diversion pipe.

[0021] Preferably, a one-way valve is provided on the diversion pipeline, and the one-way valve is open along the diversion pipeline in a direction away from the third interface.

[0022] With this setup, when the inlet flow rate of the third interface exceeds the target flow rate of the instantaneous heater, the excess water flows out through the diversion pipe. Compared to the method where "a flow meter for detecting the flow rate of the third interface is installed inside the casing, and a solenoid valve is installed on the diversion pipe, with both the solenoid valve and the flow meter communicating with the controller," this structure is simpler and has a lower manufacturing cost.

[0023] Preferably, the housing is also equipped with a water pump and a zero-pressure valve. The fourth interface, the zero-pressure valve, the water pump and the instant heater are connected in series. The water pump is communicatively connected to the controller.

[0024] With this setup, the flow rate of water to the instant heater is controlled by adjusting the pump speed, and the flow rate of water to the instant heater is not affected by the water pressure supplied by the RO water purifier, making the flow rate of water to the instant heater more precise.

[0025] Preferably, the water distributor includes a base, a first interface, a second interface, a third interface and a fourth interface are formed on the base, a first flow channel, a second flow channel and a third flow channel are formed in the base, the two ends of the first flow channel are respectively connected to the first interface and the second interface, the two ends of the second flow channel are respectively connected to the third interface and the fourth interface, the water inlet end of the third flow channel is connected to the second flow channel, and the third flow channel forms a diversion pipe.

[0026] This design enhances the overall structural integrity of the water distributor, making it easier to install within an external instant hot water box.

[0027] Preferably, the housing also includes a room temperature water pipe, the inlet of which is connected to a fourth interface, and the room temperature water pipe is equipped with a valve to adjust the on / off state of the room temperature water pipe and the fourth interface, and the valve is communicatively connected to the controller.

[0028] This setup provides both filtered room temperature water and filtered and heated hot water, further meeting users' water needs.

[0029] Preferably, the housing is provided with a first connector, a second connector, a third connector, and a fourth connector. The first connector is connected to the first interface, the second connector is connected to the second interface, the third connector is connected to the third interface, and the fourth connector is connected to the outlet of the instant heater. The first connector is used to connect to the water source, the second and third connectors are used to connect to the inlet pipe and the pure water pipe of the RO water purifier, respectively, and the fourth connector is used to connect to the faucet. The first connector, the second connector, the third connector, and / or the fourth connector are quick-connect connectors.

[0030] This setup further facilitates the connection between the external instant hot water box and the piping of the RO water purifier.

[0031] Preferably, the external instant hot water box further includes a double-sided adhesive layer disposed on the outer surface of the box body and a protective layer covering the double-sided adhesive layer, so that the external instant hot water box can be adhered and fixed to the outer surface of the RO water purifier by means of the double-sided adhesive layer; and / or the external instant hot water box further includes a magnetic adsorption component disposed on the box body, so that the external instant hot water box can be adsorbed and fixed to the outer surface of the RO water purifier with an iron shell by means of the magnetic adsorption component.

[0032] This setup allows for easy mounting of the external instant hot water box onto the RO water purifier.

[0033] In a second aspect, the present invention also provides an RO water purification device, which includes an external instant hot water box of the RO water purification device described in any one of the above technical solutions.

[0034] It should be noted that this RO water purification device has all the technical effects of the external instant hot water box of the RO water purification device described in any of the above technical solutions, and will not be repeated here. Attached Figure Description

[0035] The preferred embodiments of this utility model will now be described with reference to the accompanying drawings, in which:

[0036] Figure 1This is a schematic diagram of the external instant hot water box of the RO water purification device according to the first embodiment of this utility model;

[0037] Figure 2 This is a schematic diagram of the system structure of the RO water purification device according to the first embodiment of this utility model;

[0038] Figure 3 This is a schematic diagram of the external instant hot water box of the RO water purifier according to the second embodiment of this utility model.

[0039] List of reference numerals in the attached diagram:

[0040] 1. External instant hot water box; 11. Box body; 111. First connector; 112. Second connector; 113. Third connector; 114. Fourth connector; 115. Fifth connector; 12. Water distributor; 121. Base; 1211. First interface; 1212. Second interface; 1213. Third interface; 1214. Fourth interface; 122. First flow channel; 123. Second flow channel; 124. Third flow channel; 1241. First check valve; 1242. Diverting solenoid valve; 125. Flow meter; 13. Zero-pressure valve; 14. 15. Water pump; 151. Instant heater; 152. Water inlet sensor; 153. Water outlet sensor; 16. Normal temperature water pipeline; 161. Normal temperature water solenoid valve; 2. RO water purification equipment; 21. PCB composite filter element; 22. Booster pump; 23. RO filter element; 241. Water inlet pipe; 242. Pure water pipe; 243. Wastewater pipe; 244. Return pipe; 251. Water inlet solenoid valve; 252. Wastewater valve; 253. Second check valve; 254. Third check valve; 255. Fourth check valve; 256. Return solenoid valve; 3. Faucet. Detailed Implementation

[0041] First, those skilled in the art should understand that the embodiments described below are merely for explaining the technical principles of this utility model and are not intended to limit the scope of protection of this utility model.

[0042] It should be noted that in the description of the utility model, the terms "first", "second", "third", "fourth" and "fifth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] Furthermore, it should be noted that in the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] Based on the background technology's point that existing RO water purifiers cannot meet users' hot water needs, and replacing them with RO water purifiers with hot water functions results in resource waste, this utility model provides an RO water purification device and its external instant hot water box. The external instant hot water box includes a box body, a water distributor housed within the box body, a controller, and an instant heater communicatively connected to the controller. The water distributor includes a first interface and a second interface, as well as a third interface and a fourth interface connected together. The first interface is used to connect to a water source, the second and third interfaces are respectively used to connect to the inlet pipe and the pure water pipe of the RO water purification device, and the fourth interface is connected to the instant heater. The water distributor is provided with a diversion pipe connected to the third interface. The water distributor is configured to direct excess water flowing into the third interface to the diversion pipe when the inlet flow rate is greater than the target flow rate of the instant heater.

[0045] By providing an external instant hot water box, which connects to the inlet and pure water pipes of existing RO water purifiers, the pure water produced by the existing RO water purifier is heated into hot water by the instant heater in the external hot water box before flowing out to provide hot water to users. This meets users' hot water needs without requiring the replacement of existing RO water purifiers, avoiding unnecessary resource waste and reducing users' financial investment. Furthermore, the water distributor inside the external hot water box is equipped with a diversion pipe connected to a third interface. The water distributor is designed to direct excess water flowing into the diversion pipe when the inlet flow rate at the third interface exceeds the target flow rate of the instant heater. This means that the external hot water box of this invention is still applicable to RO water purifiers with large water production capacities. In other words, the external hot water box of this invention can be used with RO water purifiers of different flow rates, thereby reducing the upgrade and renovation costs of existing RO water purifiers and also reducing the development and manufacturing costs of the external hot water box.

[0046] The following reference Figures 1 to 3 This utility model will be described in detail below. Among other things, Figure 1 This is a schematic diagram of the external instant hot water box of the RO water purification device according to the first embodiment of this utility model; Figure 2 This is a schematic diagram of the system structure of the RO water purification device according to the first embodiment of this utility model;

[0047] Figure 3 This is a schematic diagram of the external instant hot water box of the RO water purifier according to the second embodiment of this utility model.

[0048] In the first embodiment of this utility model, as Figure 1As shown, the external instant hot water box 1 includes a box body 11. Inside the box body 11, there is a water distributor 12, a zero-pressure valve 13, a water pump 14, an instant heater 15, and a controller (not shown in the figure). The instant heater 15 can be a thick film heater, a tubular instant heater, or other suitable instant heaters. The box body 11 is provided with a first connector 111, a second connector 112, a third connector 113, a fourth connector 114, and a fifth connector 115. The first connector 111 is used to connect to a water source (such as a tap water pipe), the second connector 112 is used to connect to the inlet pipe of the RO water purifier, the third connector 113 is used to connect to the pure water pipe of the RO water purifier, and the fourth connector 114 and the fifth connector 115 are used to connect to the inlet interface of a faucet.

[0049] The water distributor 12 includes a base 121, on which a first interface 1211, a second interface 1212, a third interface 1213, and a fourth interface 1214 are formed. A first flow channel 122, a second flow channel 123, and a third flow channel 124 are formed inside the base 121. The two ends of the first flow channel 122 are connected to the first interface 1211 and the second interface 1212, respectively. The two ends of the second flow channel 123 are connected to the third interface 1213 and the fourth interface 1214, respectively. The inlet end of the third flow channel 124 is connected to the second flow channel 123, and the outlet end of the third flow channel 124 is connected to the first flow channel 122. A first one-way valve 1241 is provided on the third flow channel 124. The third flow channel 124 forms a diversion pipe for the third interface 1213. The first one-way valve 1241 is open along the diversion pipe in a direction away from the third interface 1213.

[0050] The first interface 1211 is connected to the first connector 111 through a connecting pipe. The second interface 1212 is connected to the second connector 112 through a connecting pipe. The third interface 1213 is connected to the third connector 113 through a connecting pipe. The fourth interface 1214 is connected in series with the zero-pressure valve 13, the water pump 14, the instant heater 15 and the fourth connector 114 through a connecting pipe. The fourth interface 1214 is connected to the fifth connector 115 through the ambient temperature water pipe 16. An ambient temperature water solenoid valve 161 is connected in series on the ambient temperature water pipe 16. A water inlet sensor 151 and a water outlet sensor 152 are respectively installed at the inlet and outlet of the instant heater 15.

[0051] The water pump 14, instant heater 15, inlet water sensor 151, outlet water sensor 152, and ambient temperature water solenoid valve 161 are connected to the controller for communication (not shown in the figure).

[0052] like Figure 2As shown, the RO water purification device 2 includes a housing (not shown in the figure), a PCB composite filter element 21, a booster pump 22, and an RO filter element 23 disposed inside the housing. The outlet end of the inlet pipe 241 is connected to the inlet of the RO filter element 23, and the inlet end of the inlet pipe 241 is connected to the second connector 112 on the external instant hot water box 1. The inlet end of the pure water pipe 242 is connected to the pure water outlet of the RO filter element 23, and the outlet end of the pure water pipe 242 is connected to the third connector 113 on the external instant hot water box 1. The wastewater outlet of the RO filter element 23 is connected to the wastewater pipe 243. The PCB composite filter element 21 includes a pre-filter element and a post-filter element (not shown in the figure). The pre-filter element, the inlet solenoid valve 251, and the booster pump 22 are connected in series along the water flow direction of the inlet pipe 241. The wastewater valve 252 is connected in series on the wastewater pipe 243. The second check valve 253, the third check valve 254, and the post-filter element of the PCB composite filter element 21 are connected in series along the water flow direction of the pure water pipe 242. The second check valve 253 and the third check valve 254 are both open along the water flow direction of the pure water pipe 242. The RO water purification equipment 2 also includes a return pipe 244. The first end of the return pipe 244 is connected to the section of the pure water pipe 242 located between the second check valve 253 and the third check valve 254. The second end of the return pipe 244 is connected to the section of the inlet pipe 241 located between the inlet solenoid valve 251 and the booster pump 22. A fourth check valve 255 and a return solenoid valve 256 are connected in series along the direction from the first end to the second end of the return pipe 244. The fourth check valve 255 is open along the direction from the first end to the second end of the return pipe 244.

[0053] In use, the first connector 111 is connected to the tap water pipe (not shown in the figure), and the fourth connector 114 and the fifth connector 115 are connected to the hot water interface and the normal temperature water interface of the faucet 3, respectively. Tap water flows sequentially through the first connector 111, the first interface 1211, the first flow channel 122, the second interface 1212, and the second connector 112 before entering the inlet pipe 241. The tap water flows sequentially along the inlet pipe 241 through the pre-filter part of the PCB composite filter element 21, the inlet solenoid valve 251, and the booster pump 22 before entering the RO filter element 23. The wastewater produced by the RO filter element 23 is discharged through the wastewater pipe 243, and the pure water produced by the RO filter element 23 enters the pure water pipe 242. The pure water entering the pure water pipe 242 flows sequentially through the second one-way valve 253, the third one-way valve 254, and the post-filter part of the PCB composite filter element 21 before entering the third connector 113 of the external instant hot water box 1.

[0054] When hot water is needed, the controller of the external instant hot water box 1 controls the water pump 14 and the instant heater 15 to work and controls the ambient temperature water solenoid valve 161 to be in the closed state. The pure water entering the third connector 113 flows sequentially through the third interface 1213, the second flow channel 123, and the fourth interface 1214 before flowing to the zero pressure valve 13. The flow rate of pure water from the zero pressure valve 13 to the instant heater 15 is regulated by the water pump 14. The water flowing into the instant heater 15 is heated into hot water by the instant heater 15 and then flows to the faucet 3 through the fourth connector 114. When the flow rate of pure water entering the third interface 1213 is greater than the flow rate of water pumped by the water pump 14 (i.e., the target flow rate of the instant heater 15), the excess pure water flows along the third flow channel 124 to the first flow channel 122 and flows together with the tap water in the first flow channel 122 through the second interface 1212 and the second connector 112 before flowing into the water inlet pipe 241.

[0055] When room temperature water is needed, the controller of the external instant hot water box 1 controls the water pump 14 and the instant heater 15 to stop working and controls the room temperature water solenoid valve 161 to open. The pure water entering the third connector 113 flows through the third interface 1213, the second flow channel 123, the fourth interface 1214, the room temperature water pipe 16 and the fifth connector 115 in sequence before flowing to the faucet 3.

[0056] By providing the aforementioned external instant hot water box 1, which is connected to the inlet pipe 241 and pure water pipe 242 of the existing RO water purifier 2, the pure water produced by the existing RO water purifier 2 can be heated into hot water by the instant heater 15 of the external instant hot water box 1 and then flowed out to provide hot water to users, thus meeting their hot water needs. Furthermore, it eliminates the need to replace the existing RO water purifier 2, avoiding unnecessary resource waste and reducing users' financial investment.

[0057] The water distributor 12 includes a base 121, on which a first interface 1211, a second interface 1212, a third interface 1213, and a fourth interface 1214 are formed. A first flow channel 122, a second flow channel 123, and a third flow channel 124 are formed inside the base 121. The two ends of the first flow channel 122 are connected to the first interface 1211 and the second interface 1212, respectively. The two ends of the second flow channel 123 are connected to the third interface 1213 and the fourth interface 1214, respectively. The inlet end of the third flow channel 124 is connected to the second flow channel 123, and the outlet end of the third flow channel 124 is connected to the first flow channel 122. A first one-way valve 1241 is provided on the third flow channel 124. The third flow channel 124 forms a diversion pipe for the third interface 1213. The first one-way valve 1241 is open along the diversion pipe in a direction away from the third interface 1213. With this configuration, when the inlet flow rate of the third interface 1213 exceeds the target flow rate of the instantaneous heater 15, the excess water flowing into the third interface 1213 is directed to the branch pipe. This ensures that the external instantaneous water box 1 of this invention remains applicable even to RO water purifiers 2 with large water production capacities. Furthermore, the water distributor 12 has a more robust overall structure, facilitating its installation within the external instantaneous water box 1.

[0058] The outlet of the third channel 124 is connected to the first channel 122, allowing excess water to flow into the inlet pipe 241 of the RO water purifier 2 via the diversion pipe. The pure water flowing to the inlet pipe 241 through the diversion pipe can dilute the raw water entering the inlet pipe 241, reducing the concentration of calcium and magnesium ions in the water flowing to the RO filter element 23 of the RO water purifier 2 through the inlet pipe 241. This has a certain rinsing effect on the filter surface of the RO membrane in the RO filter element 23, thereby reducing the risk of RO membrane clogging and extending the service life of the RO filter element.

[0059] A first check valve 1241 is provided on the third flow channel 124. The first check valve 1241 is open along the diversion pipe in a direction away from the third interface 1213. In this way, when the inlet flow rate of the third interface 1213 is greater than the target flow rate of the instant heater 15, the water flow that flows into the third interface 1213 and exceeds the target flow rate will automatically flow out through the diversion pipe. The structure is simpler and the manufacturing cost is lower.

[0060] The fourth interface 1214, the zero-pressure valve 13, the water pump 14 and the instant heater 15 are connected in series. The water pump 14 is connected to the controller. In this way, the flow rate of water to the instant heater 15 is controlled by controlling the speed of the water pump 14. The flow rate of water to the instant heater 15 is not affected by the water pressure of the RO water purifier, and the flow rate of water to the instant heater 15 is more accurate.

[0061] Preferably, the first connector 111, the second connector 112, the third connector 113, the fourth connector 114, and the fifth connector 115 are all quick-connect connectors. This makes it easier to connect the external instant hot water box 1 to the inlet pipe 241 and the pure water pipe 242 of the RO water purifier 2, as well as the faucet 3.

[0062] In the second embodiment of this utility model, such as Figure 3 As shown, the water distributor 12 differs from the first embodiment in its structure. Specifically, the third interface 1213 is connected to the second flow channel 123 via a flow meter 125, and the first check valve 1241 on the third flow channel 124 is replaced by a diversion solenoid valve 1242. Both the flow meter 125 and the diversion solenoid valve 1242 are communicatively connected to the controller of the external instant hot water box 1.

[0063] During use, the controller controls the flow meter 125 to detect the flow rate of water entering the third interface 1213 in real time. When the flow meter 125 detects that the flow rate of pure water entering the third interface 1213 is greater than the flow rate of water pumped by the water pump 14, the controller controls the diversion solenoid valve 1242 to open, so that the excess water flows out through the third flow channel 124.

[0064] In some other feasible embodiments, unlike the embodiments described above, the water pump 14 and zero-pressure valve 13 are not provided. The fourth interface 1214 is connected to the inlet of the instant heater 15 via a pipeline. An adjustable solenoid valve is connected in series on this pipeline and is communicatively connected to a controller. The flow rate of water from the fourth interface 1214 to the instant heater 15 is adjusted by controlling the opening of this solenoid valve.

[0065] In some other feasible embodiments, unlike the embodiments described above, the above-mentioned ambient temperature water solenoid valve 161 is not provided. The fourth interface 1214 is connected to the inlet of a three-way solenoid valve. The first outlet and the second outlet of the three-way solenoid valve are respectively connected to the inlet of the ambient temperature water pipeline 16 and the zero-pressure valve 13. The flow direction of the water flowing out of the fourth interface 1214 is controlled by the three-way solenoid valve.

[0066] In some other feasible embodiments, unlike the embodiments described above, the water distributor 12 is configured to include a tubular first interface, a second interface, a third interface, a fourth interface, a first water pipe connecting the first interface and the second interface, a second water pipe connecting the third interface and the fourth interface, and a third water pipe connecting the first water pipe and the second water pipe, the third water pipe forming a diversion pipeline.

[0067] In some other feasible embodiments, unlike the embodiments described above, the outlet end of the diversion pipe is connected to the wastewater pipe 243 of the RO water purifier 2, so that the water flowing out of the outlet end of the diversion pipe can flow into the RO filter element of the RO water purifier through the wastewater pipe 243 to flush the RO filter element.

[0068] In some other feasible embodiments, unlike the embodiments described above, the ambient temperature water pipe 16 and the fifth connector 115 are not provided. Thus, when ambient temperature water is needed, the controller of the external instant hot water box 1 controls the water pump 14 to operate and the instant heater 15 to stop operating. The pure water flowing from the fourth port 1214 flows sequentially through the zero-pressure valve 13, the instant heater 15, and the fourth connector 114 before flowing to the faucet 3.

[0069] In some other feasible embodiments, unlike the embodiments described above, the external instant hot water box 1 does not have a first connector 111, a second connector 112, a third connector 113, a fourth connector 114, and a fifth connector 115 on its box body 11. The first interface 1211, the second interface 1212, the third interface 1213 of the water distributor 12, and the outlet of the instant heater 15 are directly connected to the tap water pipe, the inlet pipe 241 of the RO water purifier 2, the pure water pipe 242 of the RO water purifier 2, the hot water interface of the faucet 3, and the room temperature water interface, respectively.

[0070] Based on the above embodiments, preferably, the external instant hot water box 1 further includes a double-sided adhesive layer (not shown in the figure) disposed on the outer surface of the box body 11 and a protective layer (not shown in the figure) covering the double-sided adhesive layer. By peeling off the protective layer, the external instant hot water box 1 is bonded and fixed to the shell of the RO water purifier 2 through the double-sided adhesive layer, thus making it easy to fix the external instant hot water box 1 to the shell of the RO water purifier 2.

[0071] When the RO water purifier 2 has an iron shell, a magnetic adsorption component (such as a neodymium iron boron magnet, samarium cobalt magnet, or alnico magnet) can be provided on the box 11 of the external instant hot water box 1 so that the external instant hot water box 1 can be magnetically adsorbed and fixed to the outer surface of the RO water purifier 2 with an iron shell by means of the magnetic adsorption component. Of course, the external instant hot water box 1 can also include a double-sided adhesive layer on the outer surface of the box 11 and a protective layer covering the double-sided adhesive layer, and at the same time, a magnetic adsorption component can be provided on the box 11 of the external instant hot water box 1.

[0072] In addition, this utility model also provides an RO water purification device, which is equipped with an external instant hot water box 1 of any of the above embodiments.

[0073] It should be noted that the RO water purification device has all the technical effects of the external instant hot water box 1 described in any of the above embodiments, and will not be repeated here.

[0074] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A RO water purifier's external instant hot water box (1) characterized in that, The external instant heating water box (1) comprises a box body (11), a water distributor (12) arranged in the box body (11), a controller, and an instant heater (15) in communication connection with the controller; The water distributor (12) comprises a first interface (1211) and a second interface (1212) in communication connection, and a third interface (1213) and a fourth interface (1214) in communication connection, the first interface (1211) is used for connecting a water source, the second interface (1212) and the third interface (1213) are respectively used for connecting a water inlet pipe (241) and a pure water pipe (242) of the RO water purification equipment, and the fourth interface (1214) is connected with the instant heater (15); The water distributor (12) is provided with a shunt pipeline connected with the third interface (1213), and the water distributor (12) is arranged to be capable of making the water flow, which is more than the target flow of the instant heater (15) and flows into the third interface (1213), flow to the shunt pipeline when the water flow of the third interface (1213) is greater than the target flow of the instant heater (15).

2. The external instant water heating cartridge (1) according to claim 1, characterized in that, An outlet end of the shunt pipeline is in communication with the second interface (1212), so that the water flowing out of the outlet end of the shunt pipeline can flow into the RO filter core of the RO water purification equipment through the water inlet pipe (241); Or the outlet end of the shunt pipeline is used for being connected to a waste water pipe (243) of the RO water purification equipment, so that the water flowing out of the outlet end of the shunt pipeline can flow into the RO filter core of the RO water purification equipment through the waste water pipe (243) to realize flushing of the RO filter core.

3. An external instant water heating cartridge (1) according to claim 1 or 2, characterized in that, A one-way valve (1241) is arranged on the shunt pipeline, and the one-way valve (1241) is conductive in a direction away from the third interface (1213) along the shunt pipeline.

4. The external instant water heating cartridge (1) according to claim 3, characterized in that, A water pump (14) and a zero-pressure valve (13) are further arranged in the box body (11), the fourth interface (1214), the zero-pressure valve (13), the water pump (14), and the instant heater (15) are sequentially connected in series, and the water pump (14) is in communication connection with the controller.

5. The external instant water heating cartridge (1) according to claim 1 or 2, characterized in that, A flow meter (125) for detecting the flow of the third interface (1213) is arranged in the box body (11), an electromagnetic valve (1242) is arranged on the shunt pipeline, and the electromagnetic valve (1242) and the flow meter (125) are both in communication connection with the controller.

6. The external instant water heating cartridge (1) according to claim 1 or 2, characterized in that, The water distributor (12) comprises a base body (121), the first interface (1211), the second interface (1212), the third interface (1213) and the fourth interface (1214) are formed on the base body (121), a first flow channel (122), a second flow channel (123) and a third flow channel (124) are formed in the base body (121), two ends of the first flow channel (122) are connected with the first interface (1211) and the second interface (1212) respectively, two ends of the second flow channel (123) are connected with the third interface (1213) and the fourth interface (1214) respectively, a water inlet end of the third flow channel (124) is connected with the second flow channel (123), and the third flow channel (124) forms the shunt pipeline.

7. An external instant water heating cartridge (1) according to claim 1 or 2, characterized in that, The box body (11) further comprises a normal-temperature water pipeline (16), an inlet of the normal-temperature water pipeline (16) is connected with the fourth interface (1214), and the normal-temperature water pipeline (16) is provided with a valve (161) for adjusting the on-off state of the normal-temperature water pipeline (16) and the fourth interface (1214), and the valve (161) is in communication connection with the controller.

8. The external instant water heating cartridge (1) according to claim 1 or 2, characterized in that, The box body (11) is provided with a first connector (111), a second connector (112), a third connector (113) and a fourth connector (114), the first connector (111) is in communication with the first interface (1211), the second connector (112) is in communication with the second interface (1212), the third connector (113) is in communication with the third interface (1213), and the fourth connector (114) is in communication with a water outlet of the instant heater (15); The first connector (111) is used for connecting a water source, the second connector (112) and the third connector (113) are respectively used for connecting a water inlet pipe (241) and a pure water pipe (242) of the RO water purification equipment, and the fourth connector (114) is used for connecting a faucet (3); The first connector (111), the second connector (112), the third connector (113) and / or the fourth connector (114) are quick connectors.

9. An external instant water heating cartridge (1) according to claim 1 or 2, characterized in that, The external instant water box (1) further comprises a double-sided adhesive layer arranged on an outer surface of the box body (11) and a protective layer covering the double-sided adhesive layer, so that the external instant water box (1) can be fixed on an outer surface of the RO water purification equipment by means of the double-sided adhesive layer; and / or The external instant water box (1) further comprises a magnetic adsorption member arranged on the box body (11), so that the external instant water box (1) can be fixed on an outer surface of the RO water purification equipment with a ferrous shell by means of the magnetic adsorption member.

10. An RO water purification apparatus characterized by comprising: The RO water purification equipment comprises the external instant water box (1) of the RO water purification equipment according to any one of claims 1 to 9.

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