Anti-dry burning system and control method of instant water purifier

Abstract

This disclosure relates to an anti-dry-burning system and control method for an instant water purifier. The anti-dry-burning system includes a flow detection device for detecting the liquid flow rate through the inlet pipe of the instant water purifier; a gas-liquid separation check valve for allowing one-way flow of liquid in the inlet pipe while blocking the flow of gas; a pump for drawing liquid from the inlet pipe and outputting it to the heating chamber of the instant water purifier; a heating module for heating the liquid in the heating chamber; and a control module connected to the flow detection device, the pump, and the heating module via electrical signals. The control module receives detection data from the flow detection device and the pump and controls the operating state of the heating module. This disclosure uses the gas-liquid separation check valve to ensure that the pump's operation does not affect the impeller of the flow detection device in the absence of water, thus preventing misjudgment of the absence of water and avoiding the risk of dry burning.

Description

Technical Field

[0001] This disclosure relates to the field of instant hot water purifier technology, and in particular to an anti-dry-burning system and control method for an instant hot water purifier. Background Technology

[0002] Instantaneous water purifiers feature instant heating, precise temperature control, and energy efficiency. Most current instantaneous water purifiers use flow meters to detect the presence of water flow and then perform subsequent heating checks. However, when the pump is running, it draws in air, which can interfere with the flow meter's detection, leading to misjudgments of no water and posing a risk of dry burning. Summary of the Invention

[0003] In order to solve at least one of the technical problems mentioned above, this disclosure proposes an anti-dry-burning system and control method for an instant hot water purifier.

[0004] According to some embodiments of this disclosure, an anti-dry-burning system is provided, applied in an instant water purifier. The anti-dry-burning system includes: a flow detection device installed on the inlet pipe of the instant water purifier for detecting the flow rate of liquid flowing through the inlet pipe; a gas-liquid separation check valve connected to the flow detection device through the inlet pipe for allowing unidirectional flow of liquid in the inlet pipe and blocking the passage of gas in the inlet pipe; a pump, the input end of which is connected to the gas-liquid separation check valve through the inlet pipe, and the output end of which is connected to the heating chamber of the instant water purifier through a pipe for creating negative pressure to extract liquid in the inlet pipe and output it to the heating chamber; a heating module connected to the pump through a pipe and installed in the heating chamber for heating the liquid in the heating chamber; and a control module connected to the flow detection device, the pump, and the heating module via electrical signals, wherein the control module receives detection data from the flow detection device and the pump and controls the working state of the heating module.

[0005] Based on the above solution, the interference problem caused by the pump drawing air to the impeller of the flow detection device is solved by the gas-liquid separation check valve, which effectively prevents the risk of dry burning of the heating module.

[0006] In some possible implementations, the gas-liquid separation check valve includes an input port and an output port. The end of the gas-liquid separation check valve connected to the flow detection device is the input port of the gas-liquid separation check valve, and the end of the gas-liquid separation check valve connected to the pump is the output port of the gas-liquid separation check valve.

[0007] Based on the above scheme, the gas-liquid separation check valve can accurately isolate gas and allow liquid to pass through from the direction of the flow detection device toward the pump.

[0008] In some possible implementations, the gas-liquid separation check valve further includes a housing, a membrane limiting and fixing member, a through hole, an elastic device, and a weight. The membrane limiting and fixing member is disposed in the middle of the gas-liquid separation check valve. One end of the elastic device is connected to the membrane limiting and fixing member near the input port of the gas-liquid separation check valve, and the other end of the elastic device is connected to the weight. The elastic device is in a compressed state, and the weight can completely block the through hole. The through hole is disposed between the weight and the input port of the gas-liquid separation check valve.

[0009] Based on the above scheme, the gas-liquid separation check valve can be made to apply two opposite forces to the weight through the pressure difference on both sides of the through hole and the elastic device, so that the gas-liquid separation check valve can more accurately isolate gas from the direction of the flow detection device toward the pump and allow liquid to pass through.

[0010] In some possible implementations, the gas-liquid separation check valve further includes a hydrophilic ultrafiltration membrane and a sealing ring. The hydrophilic ultrafiltration membrane is disposed in the middle of the membrane limiting and fixing member, and the sealing ring is disposed at the input port and the output port of the gas-liquid separation check valve, respectively.

[0011] Based on the above solution, the liquid flowing through the gas-liquid separation check valve can pass through a hydrophilic ultrafiltration membrane and a sealing ring, thereby filtering impurities in the liquid, improving water quality, and enhancing the sealing performance of the gas-liquid separation check valve.

[0012] In some possible implementations, the gas-liquid separation check valve further includes a mounting cover disposed in the middle of the gas-liquid separation check valve housing.

[0013] Based on the above solution, the installation of the gas-liquid separation check valve can be made more convenient.

[0014] In some possible implementations, the gas-liquid separation check valve further includes a slot and a claw. The slot is respectively disposed at the input port and the output port of the gas-liquid separation check valve, and the claw is respectively disposed at the input port and the output port of the gas-liquid separation check valve. The slot and the claw are nested together.

[0015] Based on the above solutions, the installation cost of the gas-liquid separation check valve can be reduced, the service life of the instant water purifier can be extended, and the user experience can be improved.

[0016] According to some other embodiments of this disclosure, an instant hot water purifier is provided, including a water supply system, a heating system, and a control system, and also including an anti-dry-burning system as described in any of the above embodiments, wherein the anti-dry-burning system is applied to the water supply system, heating system, and control system of the instant hot water purifier.

[0017] According to some other embodiments of this disclosure, a method for controlling an anti-dry-burning system is provided, applied to an anti-dry-burning system according to any one of the above embodiments. The method includes: detecting the flow rate of the anti-dry-burning system to obtain real-time flow data of the anti-dry-burning system; controlling the heating module of the anti-dry-burning system to turn off when the real-time flow data is zero; and controlling the heating module of the anti-dry-burning system to turn on when the real-time flow data is not zero.

[0018] Based on the above solution, the anti-dry-burning system can determine whether there is a risk of dry burning by using the detection data from the flow detection device, and control the opening and closing of the heating module.

[0019] In some possible implementations, the anti-dry-burning system control method further includes the following steps: obtaining a preset time interval; controlling the pump of the anti-dry-burning system to start pumping water; and controlling the pump to stop pumping water according to the preset time interval.

[0020] Based on the above solution, the working time of the pump can be limited by setting a time interval, so that the instant water purifier can produce a certain amount of hot water each time.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0022] Implementing this disclosure will have the following beneficial effects:

[0023] When liquid flows through, the flow rate is determined by the rotation of the flow meter impeller, and subsequent heating and temperature control are then performed. When no liquid flows through, even if the pump is working and drawing in air, the flow meter impeller will not rotate due to the obstruction of the gas-liquid separation check valve. Therefore, it will not misjudge the absence of water and will avoid the risk of dry burning.

[0024] Other features and aspects of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions and advantages in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A symbolic flow diagram of an anti-dry-burning system according to an embodiment of the present disclosure is shown;

[0027] Figure 2 A perspective view showing the cross-sectional structure of the gas-liquid separation check valve in an anti-dry-burning system according to an embodiment of the present disclosure;

[0028] Figure 3 A front view showing the cross-sectional structure of the gas-liquid separation check valve in an anti-dry-burning system according to an embodiment of the present disclosure;

[0029] Figure 4 A rear view showing a cross-sectional structure of the gas-liquid separation check valve in an anti-dry-burning system according to an embodiment of the present disclosure;

[0030] Figure 5 This diagram illustrates a control method flow chart for an anti-dry-burning system according to an embodiment of the present disclosure.

[0031] Figure 6 A simplified structural block diagram of an instant water purifier with an anti-dry-burning system according to an embodiment of the present disclosure is shown.

[0032] In the picture,

[0033] 1-Housing; 2-Sealing ring; 3-Membrane limiting and fixing component; 4-Hydrophilic ultrafiltration membrane; 5-Through hole; 6-Elastic device; 7-Weight; 8-Mounting cover; 9-Slot; 10-Claw; 11-Flow detection device; 12-Gas-liquid separation check valve; 13-Pump; 14-Heating module. Detailed Implementation

[0034] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or server that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0036] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0037] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0038] In this document, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0039] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0040] To facilitate understanding of this disclosure, some technical terms appearing in this disclosure are explained or defined below:

[0041] Instantaneous water purifiers are high-tech smart home appliances that have emerged in response to the fast pace of modern life and the growing demand for healthy drinking water. Compared with traditional storage-type water purifiers, instantaneous water purifiers solve the problem of water quality changes caused by repeated heating, reduce energy consumption, and provide the convenient experience of instant heating and immediate drinking.

[0042] Instantaneous water purifiers combine instant heating technology with water purification functions. Their control process is relatively complex, involving two main steps: water purification and instant heating. The following is a detailed description of their control process:

[0043] First, make sure the power supply to the instant hot water purifier is connected and turned on. Some high-end models may be equipped with a remote control, which can be used to turn it on and off.

[0044] Open the water inlet valve to allow cold water to flow into the machine. For some portable or desktop models, you may need to confirm that the water tank is correctly installed and full of water.

[0045] The water first passes through a pre-filter to remove large particles of impurities. Then the water flows through a series of water purification filters, which may include PP cotton filters, activated carbon filters, reverse osmosis membranes (RO membranes) or ultrafiltration membranes, to remove residual chlorine, odors, heavy metals, bacteria, viruses and other particulate matter, depending on the machine configuration.

[0046] The control module monitors water quality and filter status in real time and adjusts the water purification process as needed. For example, it may remind the user to replace the filter when it detects that the filter is about to reach the end of its life. Users can set the desired water temperature and flow rate through the control panel, knob, or remote control.

[0047] After receiving the temperature command and the preset time command, the control module starts the water pump to pump the purified cold water into the heater and starts the timer.

[0048] The heater starts working immediately, using high power to quickly heat the water to the set temperature; a precise temperature control system ensures the stability and accuracy of the outlet water temperature.

[0049] Before dispensing water, if the machine is equipped with a child lock function, it needs to be unlocked first. This usually requires pressing and holding a specific button for a few seconds until you hear a prompt sound.

[0050] Users select water volume (such as small cup, large cup) or continuous water dispensing mode. The machine dispenses water according to the set temperature and volume. During the water dispensing process, the machine may use frequency conversion technology to control the flow rate and temperature to ensure that hot water at the required temperature is provided quickly and accurately.

[0051] After use, users can choose to turn off the power. Some models have automatic standby or energy-saving modes, which automatically enter a low-power state after a certain period of inactivity.

[0052] Regularly checking and replacing the filter cartridge is key to maintaining water purification effectiveness and machine performance. Based on usage frequency and water quality, follow the manufacturer's recommended maintenance cycle. In summary, instant water purifiers, through their integrated control system, achieve fully automated management of the entire process from water source introduction and purification to instant water heating, providing users with a convenient, safe, and fast drinking water experience.

[0053] However, since most instant water purifiers use flow meters to detect whether water is flowing through them and then make subsequent heating decisions, the air pumped in when the pump is working can interfere with the flow meter's detection, leading to misjudgments of no water and a risk of dry burning.

[0054] To address the aforementioned technical problems, this disclosure provides an anti-dry-burning system, please refer to... Figures 1-4This anti-dry-burning system, applied in instant water purifiers, includes: a flow detection device 11, installed on the inlet pipe of the instant water purifier, used to detect the flow rate of liquid flowing through the inlet pipe; a gas-liquid separation check valve 12, connected to the flow detection device 11 through the inlet pipe, used to allow one-way flow of liquid in the inlet pipe and block the passage of gas in the inlet pipe; a pump 13, the input end of which is connected to the gas-liquid separation check valve 12 through the inlet pipe, and the output end of which is connected to the heating chamber of the instant water purifier through a pipe, used to create negative pressure to extract liquid in the inlet pipe and output it to the heating chamber; a heating module 14, connected to the pump 13 through a pipe and installed in the heating chamber, used to heat the liquid in the heating chamber; and a control module, which is connected to the flow detection device 11, the pump 13 and the heating module 14 through electrical signals, and receives the detection data from the flow detection device 11 and the pump 13 to control the working state of the heating module 14.

[0055] Based on the above configuration, by installing the gas-liquid separation check valve 12 between the flow detection device 11 and the pump 13, when the pump 13 uses negative pressure to extract liquid, the flow detection device 11 detects the liquid flowing through and controls the heating module 14 to turn on. When the pump 13 uses negative pressure to extract air, due to the obstruction of the gas-liquid separation check valve 12, the impeller of the flow detection device 11 will not be disturbed by the air flow, thereby controlling the heating module 14 to turn off, avoiding the risk of the heating module 14 burning out.

[0056] In this disclosed embodiment, please refer to Figures 1-4 The gas-liquid separation check valve 12 of the anti-dry-burning system includes an input port and an output port. The end of the gas-liquid separation check valve 12 connected to the flow detection device 11 is the input port of the gas-liquid separation check valve 12, and the end of the gas-liquid separation check valve 12 connected to the pump 13 is the output port of the gas-liquid separation check valve 12. The gas-liquid separation check valve 12 includes a housing 1, a sealing ring 2, a membrane limiting and fixing component 3, a hydrophilic ultrafiltration membrane 4, a through hole 5, an elastic device 6, and a weight 7. The sealing ring 2 is respectively set in the gas-liquid separation check valve. The input port of valve 12 and the output port of gas-liquid separation check valve 12 are connected. The membrane limiting and fixing member 3 is located in the middle of the gas-liquid separation check valve 12. The hydrophilic ultrafiltration membrane 4 is located in the middle of the membrane limiting and fixing member 3. One end of the elastic device 6 is connected to the membrane limiting and fixing member 3 near the input port of gas-liquid separation check valve 12. The other end of the elastic device 6 is connected to the weight. The elastic device 6 is in a compressed state. The weight can completely block the through hole 5. The through hole 5 is located between the weight and the input port of gas-liquid separation check valve 12.

[0057] Based on the above configuration, when liquid or gas flows from the input port to the output port of the gas-liquid separation check valve 12, the weight 7 blocks the through hole 5 under the action of the elastic device 6. At this time, neither liquid nor gas can pass through the gas-liquid separation check valve 12. When the pump 13 is working, since the pressure at the output port of the gas-liquid separation check valve 12 is less than the pressure at the input port of the gas-liquid separation check valve 12, the weight 7 is subjected to a force opposite to the force exerted on the weight 7 by the elastic device 6 under the action of the pressure difference. At this time, if the output of the gas-liquid separation check valve 12 is not connected to the input port, the liquid or gas cannot pass through the gas-liquid separation check valve 12. When the inlet is gas, the pressure provided by the gas at the inlet port of the gas-liquid separation check valve 12 is too small, so the force exerted on the weight 7 by the elastic device 6 is greater than the force generated by the pressure difference. At this time, the weight 7 blocks the through hole 5, and the gas cannot pass through. If the inlet of the gas-liquid separation check valve 12 is liquid, the pressure provided by the liquid at the inlet port of the gas-liquid separation check valve 12 is greater than the pressure provided by the gas. Therefore, the force exerted on the weight 7 by the elastic device 6 is less than the force generated by the pressure difference. At this time, the weight 7 moves, the through hole 5 opens, and the liquid passes through.

[0058] In this disclosed embodiment, please refer to Figures 1-4 The gas-liquid separation check valve 12 also includes a mounting cover 8, a slot 9, and a claw 10. The mounting cover 8 is located in the middle of the housing 1 of the gas-liquid separation check valve 12. The slots 9 are respectively located at the input port and the output port of the gas-liquid separation check valve 12, and the claws 10 are respectively located at the input port and the output port of the gas-liquid separation check valve 12. The slots 9 and the claws 10 are nested together. Based on the above configuration, when the gas-liquid separation check valve 12 is damaged due to different user habits, the gas-liquid separation check valve 12 can be replaced individually, increasing the service life of the instant hot water purifier and improving the user experience.

[0059] In one specific embodiment, the flow detection device 11 includes an impeller flow meter, the pump 13 includes a DC pump, the heating module 14 includes a rare earth thick film heating tube, and the control module is electrically connected to the impeller flow meter, the DC pump, and the heating tube, respectively. The control module receives the flow data detected by the impeller flow meter and sends a control signal to the heating tube. Preferably, the heating tube can be a rare earth thick film heating tube.

[0060] To better understand the embodiments of this disclosure, please refer to Figure 5 A method for controlling an anti-dry-burning system is provided, applied to an anti-dry-burning system according to any of the above embodiments, comprising:

[0061] S101. If a start signal is detected, obtain the flow meter's detection data at a preset time interval;

[0062] In this embodiment of the disclosure, specifically, the flow meter, the gas-liquid separation check valve, the pump and the heating module are connected in sequence, the flow meter is electrically connected to the control module, and the flow meter is used to detect the flow rate of liquid flowing through the water inlet pipe.

[0063] S102. Send the first control signal to the pump to trigger the pump to start pumping water;

[0064] In this embodiment, the pump is typically a DC pump or an AC pump, and the process of the control module controlling the pump can be implemented by a control circuit that includes control elements such as relays, transistors, and thyristors. The specific implementation can be based on the actual situation and with reference to relevant materials. This embodiment does not impose any limitations on this.

[0065] S103. When the flow meter's detection data is not the target preset value, a first control signal is sent to the heating module to trigger the heating module to start heating;

[0066] When the flow meter detects the target preset value, a second control signal is sent to the heating module to trigger the heating module to stop heating.

[0067] In this embodiment, the target preset value of the flow meter is zero. That is, when the flow meter's detection data is not zero, the control module controls the heating module to start heating; when the flow meter's detection data is zero, the control module controls the heating module to stop heating. Because of the presence of a gas-liquid separation check valve between the flow meter and the pump, interference caused by the pump drawing air and causing the flow meter's impeller to rotate is reduced, preventing the risk of the heating module burning out. The specific principle of the gas-liquid separation check valve is as follows: when liquid or gas flows from the input port to the output port of the gas-liquid separation check valve, the through hole is blocked by a weight under the action of the elastic device. At this time, neither liquid nor gas can pass through the gas-liquid separation check valve. However, when the pump is working, the gas-liquid separation check valve... The pressure at the output port of the gas-liquid separation check valve is less than the pressure at the input port. Under this pressure difference, the weight experiences a force opposite to the force exerted on the weight by the elastic device. If the input of the gas-liquid separation check valve is gas, the pressure provided by the gas at the input port is too low, causing the force exerted on the weight by the elastic device to be greater than the force generated by the pressure difference. In this case, the weight blocks the passage, preventing gas from passing through. Conversely, if the input of the gas-liquid separation check valve is liquid, the pressure provided by the liquid at the input port is greater than the pressure provided by the gas. Therefore, the force exerted on the weight by the elastic device is less than the force generated by the pressure difference, causing the weight to move, the passage to open, and the liquid to pass through.

[0068] S104. At a preset time interval, a second control signal is sent to the pump to trigger the pump to stop pumping water.

[0069] In the embodiments of this disclosure, the preset time interval is generally achieved by a timer or a control module. The purpose of setting the time interval is to limit the working time of the pump so that the instant water purifier can produce a certain amount of hot water after each start-up.

[0070] In another specific embodiment, please refer to Figure 6 This invention provides an instant hot water purifier with an anti-dry-burning system. The instant hot water purifier includes: a flow meter, a gas-liquid separation check valve, a pump, an anti-dry-burning water storage box, and a heating element. The flow meter, pump, and heating element are electrically connected to a control module. The flow meter is used to detect the flow rate of liquid flowing into the inlet. The gas-liquid separation check valve allows liquid entering through the inlet to pass in one direction while blocking gas from entering through the inlet. The pump is used to create negative pressure to draw liquid from the inlet and output it to the anti-dry-burning water storage box. The anti-dry-burning water storage box is located on top of the heating element and is used to store liquid. The heating element is used to heat the liquid flowing through it.

[0071] The liquid enters through the inlet and flows sequentially through the flow meter, the gas-liquid separation check valve, and the pump. After passing through the anti-dry-burning water storage box, it flows through the pipeline to the heating element and from the other end of the heating element to the outlet. When the pipeline is cut off, the water in the anti-dry-burning water storage box can continue to supply water to the heating element under the action of gravity, which plays a certain delay role. This allows time for the control module to react and stop the operation of the heating element. At the same time, it helps the heating element to cool down quickly, effectively avoiding the risk of damage to the heating element when it is not in water.

[0072] Optionally, a one-way valve can be installed between the pump and the anti-dry-burning water storage box, so that when the water supply is interrupted, all the water in the anti-dry-burning water storage box flows into the heating pipe, preventing the water in the anti-dry-burning water storage box from flowing back, and ensuring high reliability of anti-dry-burning.

[0073] Optionally, a heat insulation sleeve can be wrapped around the outside of the heating tube, and the pipe between the pump and the anti-dry-burning water storage box can be placed in the heat insulation sleeve. The heat insulation sleeve can effectively absorb the heat emitted from the heating tube and preheat the water passing through the heat insulation sleeve. It has the characteristics of simple structure, energy saving and environmental protection. After the liquid is preheated, it flows into the heating tube and is heated in real time according to the preset temperature, effectively utilizing the heat generated by the heating tube. The heat insulation sleeve is made of silicone, which is easy to seal and nest with the pipeline.

[0074] Optionally, a level gauge is installed at the bottom of the anti-dry-burning water storage box. The level gauge is electrically connected to the control module. When the pump or main pipeline fails, the water pre-stored in the anti-dry-burning water storage box flows into the heating tube to prevent the heating tube from burning dry. When the water level in the anti-dry-burning water storage box continues to drop to the set position and is detected by the level gauge, the control module receives the detection information from the level gauge and controls the heating tube to shut down, reducing the risk of the heating tube burning dry.

[0075] Optionally, a water vapor separator is installed between the heating element and the water outlet. The water vapor separator is connected to a steam pipe and a water outlet pipe. The steam pipe is used to discharge water vapor, and the water outlet pipe is connected to the water outlet to produce hot water. The water vapor separator can separate water vapor, preventing water from splashing out of the water outlet pipe, making it safer and more convenient for users.

[0076] Furthermore, in the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0077] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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 invention 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 invention.

[0078] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An anti-dry-burning system, applied in an instant hot water purifier, characterized in that, The anti-dry-burning system includes: A flow detection device (11) is installed on the inlet pipe of the instant hot water purifier to detect the flow rate of the liquid flowing through the inlet pipe; The one-way valve (12) includes an input port and an output port. The end of the one-way valve (12) connected to the flow detection device (11) is the input port of the one-way valve (12). The one-way valve (12) is connected to the flow detection device (11) through the water inlet pipe and is used to allow the liquid in the water inlet pipe to pass in one direction and to block the gas in the water inlet pipe from passing through. Pump (13), the input end of the pump (13) is connected to the one-way valve (12) through the water inlet pipe, the end of the one-way valve (12) connected to the pump (13) is the output port of the one-way valve (12), and the output end of the pump (13) is connected to the heating chamber of the instant hot water purifier through the pipe, which is used to form a negative pressure to draw out the liquid in the water inlet pipe and output it to the heating chamber; A heating module (14) is connected to the pump (13) via a pipe and installed in the heating chamber for heating the liquid in the heating chamber; The control module is connected to the flow detection device (11), the pump (13) and the heating module (14) via electrical signals. The control module receives the detection data from the flow detection device (11) and the pump (13) and controls the working state of the heating module (14).

2. The anti-dry-burning system according to claim 1, characterized in that: The one-way valve (12) also includes a housing (1), a membrane limiting fastener (3), a through hole (5), an elastic device (6), and a weight (7). The membrane limiting fastener (3) is located in the middle of the one-way valve (12). One end of the elastic device (6) is connected to the side of the membrane limiting fastener (3) near the input port of the one-way valve (12). The other end of the elastic device (6) is connected to the weight (7). The elastic device (6) is in a compressed state. The weight (7) can completely block the through hole (5). The through hole (5) is located between the weight (7) and the input port of the one-way valve (12).

3. The anti-dry-burning system according to claim 2, characterized in that: The one-way valve also includes a hydrophilic ultrafiltration membrane (4) and a sealing ring (2). The hydrophilic ultrafiltration membrane (4) is disposed in the middle of the membrane limiting and fixing member (3), and the sealing ring (2) is disposed at the input port of the one-way valve (12) and the output port of the one-way valve (12).

4. The anti-dry-burning system according to claim 3, characterized in that: The one-way valve (12) also includes a mounting cover (8), which is disposed in the middle of the housing (1) of the one-way valve (12).

5. The anti-dry-burning system according to claim 4, characterized in that: The one-way valve (12) further includes a slot (9) and a claw (10). The slot (9) is respectively disposed at the input port and the output port of the one-way valve (12). The claw (10) is respectively disposed at the input port and the output port of the one-way valve (12). The slot (9) and the claw (10) are nested together.

6. The anti-dry-burning system according to claim 1, characterized in that: The flow detection device (11) includes an impeller flow meter, and the pump (13) includes a DC pump.

7. An instant hot water purifier, comprising a water supply system, a heating system, and a control system, characterized in that, It also includes an anti-dry-burning system as described in any one of claims 1 to 6.

8. A method for controlling an anti-dry-burning system, employing an anti-dry-burning system as described in any one of claims 1 to 6, characterized in that, The method includes: The flow rate of the anti-dry-burning system is detected to obtain the real-time flow rate data of the anti-dry-burning system. When the real-time flow data is the target preset value, the heating module (14) of the anti-dry burning system is controlled to shut down; When the real-time flow data is not the target preset value, the heating module (14) of the anti-dry burning system is turned on.

9. The anti-dry-burning system control method according to claim 8, characterized in that, It also includes the following steps: Get the preset time interval; The pump (13) of the anti-dry-burning system is controlled to start pumping water; The pump (13) is controlled to stop pumping water according to the preset time interval.

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