Dish-washing machine drainage detection device based on pressure detection and dish-washing machine
By combining a pressure detection device and a timer, the problem of high cost and complexity of existing dishwasher drainage detection devices is solved, and a simplified function for detecting and alerting abnormal drainage is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO FOTILE KITCHEN WARE CO LTD
- Filing Date
- 2025-04-28
- Publication Date
- 2026-05-15
AI Technical Summary
Existing dishwasher drainage detection devices require multiple water volume detection devices, resulting in high costs and complex detection schemes, and they cannot effectively detect drainage abnormalities.
By employing a pressure detection device, timer, and controller, abnormal drainage conditions can be identified by detecting liquid pressure and timing data from the dishwasher valve pump assembly, simplifying the detection process and reducing costs.
It enables accurate detection of abnormal drainage conditions in dishwashers, reduces detection costs and complexity, and provides abnormal situation alerts via voice or light signals.
Smart Images
Figure CN224235364U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dishwashers, and in particular to a dishwasher drainage detection device based on pressure detection and a dishwasher. Background Technology
[0002] Existing dishwashers, after completing a washing cycle, control the activation of a valve pump assembly to drain wastewater from the dishwasher cavity, ensuring the cavity remains clean. If the dishwasher experiences poor drainage, wastewater cannot be completely expelled from the cavity. This wastewater then flows back into the cavity, contaminating dishes, reducing cleaning effectiveness, and negatively impacting the user experience.
[0003] Chinese invention patent application CN118806174A discloses a drainage detection method, device, dishwasher, and storage medium for a dishwasher. The drainage detection device for the dishwasher includes a detection module, a calculation module, an interval determination module, and a state determination module. The detection module detects the water inlet volume of the dishwasher and the drainage volume of the dishwasher within a preset time period. The calculation module calculates the difference between the water inlet volume and the drainage volume to obtain a real-time difference. The interval determination module determines the water volume interval into which the real-time difference falls from a preset water volume interval to obtain a target water volume interval. The state determination module determines the drainage state corresponding to the target water volume interval as the drainage detection result of the dishwasher.
[0004] However, the aforementioned dishwasher drainage detection device has shortcomings: it requires water level detection devices to be installed at both the dishwasher's inlet and outlet, and also requires a range determination module. This increases the drainage detection cost due to the installation of multiple water level detection devices, and also increases the complexity of the drainage detection scheme. Utility Model Content
[0005] The first technical problem to be solved by this utility model is to provide a pressure detection-based dishwasher drainage detection device that is simple, effective and low in detection cost compared to the above-mentioned prior art.
[0006] The second technical problem to be solved by this utility model is to provide a dishwasher that uses the above-mentioned pressure detection-based dishwasher drainage detection device.
[0007] The technical solution adopted by this utility model to solve the first technical problem is: a dishwasher drainage detection device based on pressure detection, characterized in that it includes:
[0008] The pressure detection device is configured to detect liquid pressure data in the pump housing of the dishwasher valve pump assembly;
[0009] The timer is configured to start timing after the dishwasher valve pump assembly initiates the drainage process;
[0010] The controller is connected to a pressure detection device and a timer to determine whether the dishwasher is in an abnormal drainage state.
[0011] Improvedly, in the pressure-based dishwasher drain detection device, the timer is integrated into the controller.
[0012] In a further improvement, in the pressure-based dishwasher drainage detection device, the pressure detection device is disposed inside the pump housing and located at the bottom of the pump housing.
[0013] Furthermore, in the pressure-detection-based dishwasher drainage detection device, the pressure detection device is a pressure sensor.
[0014] Improved in this invention, the pressure-based dishwasher drainage detection device further includes a drainage anomaly indication device connected to the controller.
[0015] Alternatively, in the pressure-based dishwasher drainage detection device, the drainage abnormality indication device may include a voice alarm module and / or a light signal alarm module.
[0016] Furthermore, in this invention, the pressure-based dishwasher drainage detection device also includes a display connected to the controller.
[0017] The technical solution adopted by this utility model to solve the second technical problem is: a dishwasher, characterized in that it uses a dishwasher drainage detection device based on pressure detection as described in any one of the claims.
[0018] Compared with existing technologies, the advantages of this invention are as follows: By including a pressure detection device, a timer, and a controller in the dishwasher drainage detection device, the pressure detection device is configured to detect the liquid pressure data in the pump housing of the dishwasher valve pump assembly. The timer is configured to start timing after the dishwasher valve pump assembly starts drainage. The controller is connected to both the pressure detection device and the timer to determine whether the dishwasher is in an abnormal drainage state based on the liquid pressure data detected by the pressure detection device and the timing data of the timer. This not only achieves accurate detection of abnormal dishwasher drainage using fewer components but also reduces detection costs and the complexity of the detection scheme. Attached Figure Description
[0019] Figure 1 This is a schematic diagram showing the connection of the main electrical components of the pressure-detection-based dishwasher drainage detection device according to an embodiment of the present invention.
[0020] Figure 2This is a schematic diagram showing the installation of the pressure detection device inside the pump casing according to an embodiment of the present invention;
[0021] Figure 3 For having Figure 2 The diagram shows the setup of the valve pump assembly in the dishwasher. Detailed Implementation
[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
[0023] This embodiment provides a dishwasher drainage detection device based on pressure detection. Specifically, see [link to details]. Figures 1-3 As shown, the pressure-detection-based dishwasher drainage detection device of this embodiment includes a pressure detection device 21, a timer 22, and a controller 23. The pressure detection device 21 and the timer 22 are respectively connected to the controller 23. Here, the pressure detection device 21 is configured to detect the liquid pressure data in the pump housing 10 of the dishwasher valve pump assembly 1; the timer 22 is configured to start timing after the dishwasher valve pump assembly starts drainage; the controller 23 determines whether the dishwasher is in an abnormal drainage state based on the liquid pressure data detected by the pressure detection device 21 and the timing data of the timer 22. Preferably, the timer 22 is integrated into the controller 23, and the pressure detection device 21 is a pressure sensor.
[0024] As a preferred location for the pressure detection device, in this embodiment, see [link to relevant documentation]. Figure 2 As shown, the pressure detection device 21 is installed inside the pump housing 10 and located at the bottom of the pump housing 10.
[0025] To provide a drainage malfunction warning when the dishwasher experiences a drainage problem, the dishwasher drainage detection device in this embodiment further includes a drainage malfunction warning device 24, which is connected to the controller 23. Depending on the specific needs, the drainage malfunction warning device 24 may have a voice alarm module or a light alarm module. Alternatively, the drainage malfunction warning device 24 may have both a voice alarm module and a light alarm module.
[0026] To meet the actual need for displaying the dishwasher's drainage status, the dishwasher drainage detection device in this embodiment may further include a display 25, which is connected to the controller 24.
[0027] This embodiment also provides a dishwasher. The dishwasher utilizes the aforementioned pressure-based dishwasher drainage detection device.
[0028] The working principle of the pressure detection-based dishwasher drainage detection device in this embodiment is explained below:
[0029] After the dishwasher finishes its washing cycle, the dishwasher valve pump assembly starts draining water, and the controller receives the liquid pressure data of the liquid in the pump housing detected by the pressure detection device at this time; the liquid pressure data detected by the pressure detection device when the dishwasher finishes its washing cycle is marked as P0.
[0030] After the dishwasher starts the drainage program and continues until the program ends, the pressure detection device sends the detected liquid pressure data to the controller at preset time intervals. The liquid pressure data detected by the pressure detection device after the dishwasher starts the drainage program are sequentially labeled P1, P2, ..., P... N The preset time interval here can be 1 second; N is the total number of motor operating power data detected by the valve pump power detection device.
[0031] The controller makes judgments based on the liquid pressure data detected by the pressure detection device during the detection period from the end of the dishwasher's washing program to the end of the drainage program, and the corresponding preset liquid pressure data:
[0032] When the pressure difference between any liquid pressure data and its corresponding preset liquid pressure data is within the corresponding preset difference range, the dishwasher is determined to be in a drainage abnormal state at the time corresponding to any liquid pressure data; otherwise, the dishwasher is determined to be in a drainage normal state at the time corresponding to any liquid pressure data. Each liquid pressure data has a corresponding preset liquid pressure data, and each preset difference range has a corresponding drainage abnormal state level.
[0033] Of course, when the controller determines that the dishwasher has been in a drainage abnormality state more than the preset number of times during the above detection period, the controller will instruct the drainage abnormality prompt device to issue a prompt, so as to remind the dishwasher to perform drainage abnormality repair.
[0034] Although the preferred embodiments of the present invention have been described in detail above, it should be clearly understood that various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A dishwasher drainage detection device based on pressure detection, characterized in that, include: The pressure detection device (21) is configured to detect liquid pressure data of the liquid in the pump housing (10) of the dishwasher valve pump assembly (1); The timer (22) is configured to start timing after the dishwasher valve pump assembly starts draining; The controller (23) is connected to the pressure detection device (21) and the timer (22) respectively to determine whether the dishwasher is in an abnormal drainage state.
2. The dishwasher drainage detection device based on pressure detection according to claim 1, characterized in that, The timer (22) is integrated into the controller (23).
3. The dishwasher drainage detection device based on pressure detection according to claim 1, characterized in that, The pressure detection device (21) is disposed inside the pump housing (10) and located at the bottom of the pump housing (10).
4. The dishwasher drainage detection device based on pressure detection according to claim 3, characterized in that, The pressure detection device (21) is a pressure sensor.
5. The dishwasher drainage detection device based on pressure detection according to any one of claims 1 to 4, characterized in that, It also includes a drainage malfunction indicator (24), which is connected to the controller (23).
6. The dishwasher drainage detection device based on pressure detection according to claim 5, characterized in that, The drainage abnormality indication device (24) has a voice alarm module and / or a light signal alarm module.
7. The dishwasher drainage detection device based on pressure detection according to claim 5, characterized in that, It also includes a display (25) which is connected to the controller (23).
8. A dishwasher, characterized in that, The application includes the pressure detection-based dishwasher drainage detection device as described in any one of claims 1 to 7.