Running anomaly detection system for reverse osmosis water purifier

Abstract

The invention relates to an abnormal operation detection system for a reverse osmosis water purifier, and belongs to the technical field of water purifier detection systems. Comprising a 220V plug input end, an abnormal heating protection module, a high-voltage control panel, a main control panel, a hot tank module, a refrigeration module, a screen control panel, a plurality of groups of detection units, a plurality of groups of execution units and a special anomaly detection unit, and is supplemented with a 4G communication unit and an independent power adapter. The system takes the main control board as a core, multi-dimensional states such as a waterway, a circuit, water quality and a liquid level are covered through the full-chain detection unit, and accurate identification and closed-loop disposal of abnormities are realized in combination with multi-layer protection mechanisms such as graded heating protection and dual dry burning prevention. The system solves the problems of detection blind areas, weak protection, insufficient intelligence and the like in the prior art, realizes safe and stable operation and convenient operation and maintenance of equipment, promotes safe and intelligent upgrading of the reverse osmosis water purifier, and is suitable for household and commercial scenes.

Description

Technical Field

[0001] This invention belongs to the technical field of water purifier testing systems, specifically relating to a reverse osmosis water purifier malfunction detection system. Background Technology

[0002] With the upgrading of residents' health awareness and the increase in attention to drinking water safety, reverse osmosis (RO) water purifiers have become the mainstream choice for household and commercial water purification due to their high-precision filtration capabilities at the micron level. The market size continues to expand, with water purifier sales reaching 4.2 billion yuan in Q1 2025, a year-on-year increase of 21%. Among them, the growth rate of high-end smart models is three times that of the industry average. Consumer demand has shifted from basic "safe thirst quenching" to "health, functionality, and intelligence." Consumers not only require that the output water quality meets the standards, but also place higher demands on the stability of equipment operation, ease of operation, and ease of maintenance. For example, they hope to monitor water quality status in real time, remotely monitor equipment operation, and receive accurate filter replacement reminders.

[0003] Existing safety protection measures have obvious limitations: overheat protection often uses a single threshold trigger (such as power off only at 80°C), which is prone to problems such as false shutdown due to slight overheating or delayed response to severe overheating. In addition, there is no abnormal data storage function, making it difficult to trace the cause of the fault. Summary of the Invention

[0004] The purpose of this invention is to provide a reverse osmosis water purifier operation abnormality detection system with a simple structure and reasonable design in order to solve the above problems.

[0005] The present invention achieves the above objectives through the following technical solutions: A reverse osmosis water purifier malfunction detection system includes a 220V plug input terminal, an abnormal heating protection module, a high-pressure control board, a main control board, a heating tank module, a cooling module, a screen control board, multiple detection units, multiple execution units, a water level abnormality detection unit, and a water replenishment solenoid valve abnormality detection unit. The 220V plug input terminal is electrically connected to the high-pressure control board via the abnormal heating protection module. The high-pressure control board, the heating tank module, the cooling module, each detection unit, and each execution unit are respectively connected to the main control board via signal. The screen control board interacts bidirectionally with the main control board. The abnormal heating protection module includes a relay switch and at least three temperature protection sensors, which are configured to be installed in the heating risk area of ​​the water purifier. The abnormal heating protection module is configured to: trigger the relay switch to cut off the 220V power supply when the detected temperature continuously exceeds 60℃ for 10 minutes; trigger the relay switch to cut off the 220V power supply immediately when the detected temperature exceeds 80℃; and simultaneously record the time of the abnormality and the corresponding temperature data and transmit them to the main control board for storage.

[0006] As a further optimization of the present invention, the hot tank module includes a hot tank body, a heating coil, an anti-dry-burning thermostat, and a heating thermostat. The heating coil is electrically connected to the heating relay of the high-voltage control board, and the anti-dry-burning thermostat and the heating thermostat are respectively connected to the high-voltage control board for signal transmission. The working status of the hot tank module is monitored in real time by the heating control unit of the main control board.

[0007] As a further optimization of the present invention, the refrigeration module includes a compressor and a refrigeration relay. The compressor is electrically connected to the refrigeration relay of the high-pressure control board, and the working status of the refrigeration module is monitored in real time by the refrigeration control unit of the main control board.

[0008] As a further optimization of the present invention, the multiple detection units include: Door control detection unit: configured to detect the opening and closing status of the water purifier door and transmit the signal to the main control board; Leakage detection unit: Configured to detect leakage in the water purifier's piping and transmit the signal to the main control board; Water quality testing unit: includes raw water TDS sensor and pure water TDS sensor, which detect the TDS values ​​of raw water and pure water respectively and transmit them to the main control board; Pressure detection unit: includes a high-pressure switch and a low-pressure switch, which detect the high-pressure and low-pressure status of the water circuit and transmit the data to the main control board, respectively; Liquid level detection unit: includes water tank liquid level probe and hot water level probe, which detect the water tank liquid level and hot water level status respectively and transmit them to the main control board; Temperature detection unit: includes hot tank NTC sensor, cold water NTC sensor and heating detection sensor, which respectively detect the hot tank temperature, cold water temperature and heating status temperature and transmit them to the main control board.

[0009] As a further optimization of the present invention, the plurality of execution units include: Drainage actuator: includes a drainage pump and a drainage solenoid valve, driven by control signals output from the main control board to realize pipeline drainage action; Flushing execution unit: includes a flushing solenoid valve, which is driven by the main control board to realize the flushing action of the reverse osmosis membrane; Water circuit control unit: includes booster pump, inlet solenoid valve, and replenishment solenoid valve, driven by control signals output from the main control board, to realize water circuit pressurization, inlet water on / off, and replenishment water on / off respectively; Backup actuator: includes a backup solenoid valve, driven by control signals output from the main control board, serving as an extended function actuator.

[0010] As a further optimization of the present invention, the screen control board is configured as follows: Connect to the touch button detection unit to detect button operation signals and transmit them to the main control board; Connect the UV water tank sterilization unit and the overflow sterilization unit, receive control signals from the main control board, and drive the corresponding sterilization function to execute. It interacts with the main control board to display system status and transmit function commands.

[0011] As a further optimization of the present invention, it also includes a 4G communication unit, which is connected to the main control board to realize the remote transmission of system operation data and abnormal data; it also includes a power adapter, which is electrically connected to the high-voltage control board to convert the voltage to 24V and then power the main control board.

[0012] As a further optimization of the present invention, the water replenishment solenoid valve abnormality detection unit is connected to the high water level detection element and the high pressure switch signal; the water replenishment solenoid valve abnormality detection unit is configured to: when the high water level detection element reports a "no water" state and the high pressure switch reports a "water present" state, determine that the water replenishment solenoid valve is abnormal, and transmit the abnormality signal to the main control board.

[0013] As a further optimization of the present invention, the water level anomaly detection unit is signal-connected to the high water level detection element and the low water level detection element; the water level anomaly detection unit is configured to: when the low water level detection element reports "no water" and the high water level detection element reports "water present", determine that the water level sensor is abnormal and transmit the abnormal signal to the main control board.

[0014] The beneficial effects of this invention are as follows: 1. This invention employs a tiered strategy of "60℃ delayed power-off + 80℃ instantaneous power-off," which avoids accidental shutdown due to slight overheating and can quickly respond to severe overheating risks. Simultaneously, it adds a temperature data recording function, facilitating the tracing of fault causes. Existing technologies often lack abnormal data storage capabilities. This system achieves a closed loop of "fault detection – emergency response – risk isolation" through multiple execution units linked to the main control board. For example, when a leak is detected, the main control board simultaneously drives the drain pump to drain water, closes the inlet solenoid valve, and cuts off the power to the heating / cooling module, preventing the leak from spreading to the circuit or damaging core components. When a high TDS value of the reverse osmosis membrane is detected, the flushing execution unit is automatically activated, restoring membrane performance without manual intervention and reducing filter element wear.

[0015] 2. This invention provides dual protection through a "dry-burning prevention thermostat (hot can module) + a temperature sensor for the heat-risk area (abnormal heat protection module)". Even if the dry-burning prevention thermostat fails, the heat protection module can still detect overheating around the hot can and cut off the main power supply to avoid serious safety accidents such as can deformation and short circuit caused by dry burning. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the abnormal heating protection system of the present invention; Figure 2 This is a schematic diagram of the architecture and flow of the abnormal heating protection system and main control board of the present invention; Figure 3 This is a schematic diagram of the low water level anomaly detection unit architecture of the present invention; Figure 4 This is a schematic diagram of the high water level anomaly detection unit architecture of the present invention. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0018] Example 1. Figure 1 - Figure 2 As shown, a reverse osmosis water purifier malfunction detection system includes a main control board. Centered on the main control board, various functional modules achieve signal interaction and power connection according to regulations: the 220V plug input serves as the system's main power inlet, establishing an electrical connection with the high-voltage control board via an abnormal heating protection module, providing a stable power supply foundation for the system; the high-voltage control board, multiple detection units, multiple execution units, water level anomaly detection unit, and water supply solenoid valve anomaly detection unit respectively establish unidirectional or bidirectional signal connections with the main control board, receiving control commands from the main control board and providing feedback on the operating status; the screen control board engages in bidirectional signal interaction with the main control board, completing command transmission and status display; simultaneously, the 4G communication unit is signal-connected to the main control board, and the power adapter is electrically connected to the high-voltage control board, converting the 220V voltage to 24V to power the control board, ensuring the stable operation of the system's control core.

[0019] like Figure 2 As shown, the hot tank module includes a hot tank body, a heating coil, an anti-dry-burning thermostat, and a heating thermostat. The heating coil is electrically connected to the heating relay on the high-voltage control board to obtain the power required for heating. The anti-dry-burning thermostat and the heating thermostat are respectively connected to the high-voltage control board to collect the liquid level protection status and temperature data of the hot tank in real time. The heating control unit of the main control board receives the above signals through the high-voltage control board and monitors the working status of the hot tank module in real time: when the heating thermostat detects that the hot tank temperature is lower than the set value, the main control board controls the heating relay to close through the high-voltage control board, and the heating coil starts heating; when the temperature reaches the set value or the anti-dry-burning thermostat detects no water, the heating circuit is immediately cut off to avoid dry burning or overheating faults.

[0020] like Figure 2As shown, the refrigeration module consists of a compressor and a refrigeration relay. The compressor is electrically connected to the refrigeration relay on the high-pressure control board. The refrigeration control unit on the main control board monitors the working status of the refrigeration module in real time: when refrigeration is required, the main control board outputs a control signal to the high-pressure control board, driving the refrigeration relay to close and the compressor to start running, thus cooling the chilled water circuit; when the chilled water temperature reaches the set value, the main control board controls the refrigeration relay to open and the compressor to stop working, achieving precise control of the refrigeration temperature.

[0021] like Figure 2 As shown, multiple detection units are categorized by function, each working independently and feeding back data to the main control board in real time: The door control detection unit continuously monitors the opening and closing status of the water purifier door. When the door is not closed, it transmits a signal to the main control board, which can then pause some operating functions according to the settings to ensure safe use. The leak detection unit is deployed in areas prone to leaks, such as pipe joints and the bottom of the water tank. Once a leak signal is detected, it is immediately transmitted to the main control board, triggering subsequent emergency actions such as drainage. The raw water TDS sensor of the water quality testing unit is installed at the raw water inlet, and the pure water TDS sensor is installed at the pure water outlet. They detect the TDS values ​​of the raw water and pure water in real time and transmit the data to the main control board to determine whether the water quality meets the standards and the filtration effect of the reverse osmosis membrane. The high-pressure switch of the pressure detection unit is installed on the high-pressure pipeline on the pure water side, and the low-pressure switch is installed on the low-pressure pipeline on the raw water side. They detect the high-pressure and low-pressure status of the water circuit respectively. When the pressure exceeds the set range, a signal is sent to the main control board so that the main control board can adjust the water circuit control strategy. The water level probe of the liquid level detection unit is installed inside the water storage tank, and the hot water level probe is installed inside the hot water tank. They respectively detect the overall liquid level of the water tank and the hot water level in the hot water tank, providing liquid level information for functions such as water replenishment and heating.

[0022] like Figure 2 As shown, multiple execution units receive control signals output from the main control board and execute corresponding actions according to instructions: The drainage execution unit includes a drainage pump and a drainage solenoid valve. When the leakage detection unit detects a leak or the system needs to be emptied from the pipeline, the main control board drives the drainage pump to start and the drainage solenoid valve to open, so as to achieve rapid drainage of the pipeline. The flushing solenoid valve of the flushing execution unit is installed at the inlet of the reverse osmosis membrane. When the system runs for a certain period of time or the TDS value of the pure water is too high, the main control board drives the flushing solenoid valve to open, flush the reverse osmosis membrane, remove impurities trapped on the membrane surface, and restore the filtration performance. The booster pump of the water circuit control unit is installed on the raw water inlet side to increase the water circuit pressure and ensure the filtration efficiency of the reverse osmosis membrane; the inlet solenoid valve controls the flow of raw water, and the makeup water solenoid valve controls the flow of makeup water to the storage tank. All three work together under the control of the main control board to achieve precise regulation of the water circuit. The backup solenoid valve of the backup actuator serves as a functional expansion element, and can be programmed through the main control board to achieve additional water circuit control or functional expansion according to actual usage requirements. The temperature detection unit has a hot tank NTC sensor embedded in the hot tank body, a cold water NTC sensor installed in the cold water tank, and a heating detection sensor close to the heating coil. These sensors detect the hot tank temperature, cold water temperature, and heating status temperature, providing data support for the start and stop control of heating and cooling functions.

[0023] like Figure 2 As shown, the screen control board undertakes the dual responsibilities of human-computer interaction and function driving: on the one hand, it is connected to the touch button detection unit to detect the user's button operation signals (such as power on / off, temperature adjustment, sterilization function activation, etc.) in real time and transmit the signals to the main control board; on the other hand, the screen control board is connected to the UV water tank sterilization unit and the overflow sterilization unit. After receiving the control signals from the main control board, it drives the corresponding sterilization elements to start, realizing water quality sterilization in the storage tank and overflow sterilization of the outlet water; at the same time, the screen control board interacts with the main control board in real time, displaying the system operating status (such as water temperature, liquid level, water quality TDS value, sterilization status, etc.) intuitively on the display screen, and transmitting the user's function commands to the main control board to complete the command execution.

[0024] like Figure 4 As shown, the water replenishment solenoid valve abnormality detection unit is connected to the high water level detection element (installed at the high water level position of the water storage tank) and the high pressure switch signal. When the high water level detection element reports "no water" (indicating that the water storage tank has not reached the high water level) and the high pressure switch reports "water present" (indicating that there is normal pressure in the water circuit), the water replenishment solenoid valve abnormality detection unit determines that the water replenishment solenoid valve is blocked or not open, and immediately transmits the abnormal signal to the main control board. The main control board can trigger an alarm and suspend related functions.

[0025] like Figure 3 As shown, the water level anomaly detection unit is connected to the high water level detection element and the low water level detection element (installed at the low water level position of the water storage tank). When the low water level detection element reports "no water" (indicating that the water storage tank is below the low water level) and the high water level detection element reports "water present" (indicating that the water storage tank has reached the high water level), the two signals contradict each other. The water level anomaly detection unit determines that the water level sensor is faulty and transmits the abnormal signal to the main control board. The main control board then activates an alarm to remind the user to inspect the sensor.

[0026] It should be noted that after the system is connected to a 220V power supply, the power adapter converts to 24V to power the main control board, and each module initializes and performs a self-test: the temperature protection sensor of the abnormal heating protection module and each detection unit begin to collect initial data and transmit it to the main control board; the main control board displays the system ready status through the screen control board, and at the same time uploads the initial running data through the 4G communication unit. After users issue commands for water use, heating, cooling, and sterilization via touch buttons, the screen control board transmits the commands to the main control board. The main control board controls the corresponding execution unit based on real-time data (such as liquid level, pressure, temperature, and water quality) fed back by the detection unit. For example, when hot water is needed, the main control board confirms the current temperature through the heating thermostat of the hot water tank module. If the temperature is not up to standard, it controls the heating coil to start and monitors the temperature in real time through the temperature detection unit. Heating stops once the temperature reaches the standard. During the water production process, the pressure detection unit monitors the water pressure, and the water quality detection unit monitors the TDS value. If the TDS value is too high, the main control board controls the flushing execution unit to flush the reverse osmosis membrane. If a fault such as leakage or abnormal heating is detected, the main control board immediately controls the execution unit to take emergency measures (such as cutting off the power, draining water, or stopping the machine). At the same time, the fault information is displayed on the screen, and a remote alarm is triggered via the 4G communication unit. Throughout the entire operation, the water level anomaly detection unit and the water replenishment solenoid valve anomaly detection unit continuously monitor the relevant status to ensure that the liquid level detection and water replenishment functions are normal; all operating data and anomaly records are stored by the main control board and uploaded in real time through the 4G communication unit to realize full-process monitoring and intelligent control of the system.

[0027] The above-described embodiments are merely examples of several implementations of the present invention, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the protection scope of the present invention.

Claims

1. A reverse osmosis water purifier malfunction detection system, characterized in that: It includes a 220V plug input terminal, an abnormal heat protection module, a high-pressure control board, a main control board, a hot tank module, a cooling module, a screen control board, multiple detection units, multiple execution units, a water level abnormality detection unit, and a water replenishment solenoid valve abnormality detection unit. The 220V plug input terminal is electrically connected to the high-pressure control board via the abnormal heat protection module. The high-pressure control board, the hot tank module, the cooling module, each detection unit, and each execution unit are respectively connected to the main control board via signals. The screen control board interacts with the main control board via bidirectional signals. The abnormal heating protection module includes a relay switch and at least three temperature protection sensors, which are configured to be installed in the heating risk area of ​​the water purifier. The abnormal heating protection module is configured to: trigger a relay switch to cut off the 220V power supply when the detected temperature exceeds 60℃ for a period of 10 minutes; trigger a relay switch to cut off the 220V power supply immediately when the detected temperature exceeds 80℃; and simultaneously record the time of the abnormality and the corresponding temperature data and transmit them to the main control board for storage.

2. The reverse osmosis water purifier malfunction detection system according to claim 1, characterized in that: The hot tank module includes a hot tank body, a heating coil, an anti-dry-burning thermostat, and a heating thermostat. The heating coil is electrically connected to the heating relay of the high-voltage control board. The anti-dry-burning thermostat and the heating thermostat are respectively connected to the high-voltage control board for signal transmission. The working status of the hot tank module is monitored in real time by the heating control unit of the main control board.

3. The reverse osmosis water purifier malfunction detection system according to claim 1, characterized in that: The refrigeration module includes a compressor and a refrigeration relay. The compressor is electrically connected to the refrigeration relay on the high-pressure control board. The operating status of the refrigeration module is monitored in real time by the refrigeration control unit on the main control board.

4. The reverse osmosis water purifier malfunction detection system according to claim 1, characterized in that: The multiple detection units include: Door control detection unit: configured to detect the opening and closing status of the water purifier door and transmit the signal to the main control board; Leakage detection unit: Configured to detect leakage in the water purifier's piping and transmit the signal to the main control board; Water quality testing unit: includes raw water TDS sensor and pure water TDS sensor, which detect the TDS values ​​of raw water and pure water respectively and transmit them to the main control board; Pressure detection unit: includes a high-pressure switch and a low-pressure switch, which detect the high-pressure and low-pressure status of the water circuit and transmit the data to the main control board, respectively; Liquid level detection unit: includes water tank liquid level probe and hot water level probe, which detect the water tank liquid level and hot water level status respectively and transmit them to the main control board; Temperature detection unit: includes hot tank NTC sensor, cold water NTC sensor and heating detection sensor, which respectively detect the hot tank temperature, cold water temperature and heating status temperature and transmit them to the main control board.

5. The reverse osmosis water purifier malfunction detection system according to claim 1, characterized in that: The multiple sets of execution units include: Drainage actuator: includes a drainage pump and a drainage solenoid valve, driven by control signals output from the main control board to realize pipeline drainage action; Flushing execution unit: includes a flushing solenoid valve, which is driven by the main control board to realize the flushing action of the reverse osmosis membrane; Water circuit control unit: includes booster pump, inlet solenoid valve, and replenishment solenoid valve, driven by control signals output from the main control board, to realize water circuit pressurization, inlet water on / off, and replenishment water on / off respectively; Backup actuator: includes a backup solenoid valve, driven by control signals output from the main control board, serving as an extended function actuator.

6. The reverse osmosis water purifier malfunction detection system according to claim 1, characterized in that: The screen control panel is configured as follows: Connect to the touch button detection unit to detect button operation signals and transmit them to the main control board; Connect the UV water tank sterilization unit and the overflow sterilization unit, receive control signals from the main control board, and drive the corresponding sterilization function to execute. It interacts with the main control board to display system status and transmit function commands.

7. The reverse osmosis water purifier malfunction detection system according to claim 1, characterized in that: It also includes a 4G communication unit, which is connected to the main control board to enable remote transmission of system operation data and abnormal data; it also includes a power adapter, which is electrically connected to the high-voltage control board to convert the voltage to 24V and then power the main control board.

8. The reverse osmosis water purifier malfunction detection system according to claim 1, characterized in that: The water supply solenoid valve abnormality detection unit is connected to the high water level detection element and the high pressure switch signal; the water supply solenoid valve abnormality detection unit is configured to: when the high water level detection element reports "no water" and the high pressure switch reports "water present", determine that the water supply solenoid valve is abnormal and transmit the abnormality signal to the main control board.

9. The reverse osmosis water purifier malfunction detection system according to claim 1, characterized in that: The water level anomaly detection unit is connected to the high water level detection element and the low water level detection element. The water level anomaly detection unit is configured to determine that the water level sensor is abnormal when the low water level detection element reports "no water" and the high water level detection element reports "water present". The abnormal signal is then transmitted to the main control board.

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