Liquid anti-dry-burning system
By introducing a dual detection mechanism of temperature sensor and capacitance detection module into the liquid heating device, the problem of inaccurate detection caused by scale accumulation is solved, and accurate anti-fired function and equipment life are achieved.
Patent Information
- Application Number
- CN202421865204.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-03
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-08-03
AI Technical Summary
In existing liquid heating devices, temperature sensors and water level detection methods are prone to inaccurate detection due to scale accumulation, which affects the accuracy and service life of the anti-dry burning function.
The temperature sensor is used to detect the liquid temperature, and the microprocessor and comparison module in the controller determine whether it exceeds the preset threshold. The timer and the capacitance detection module are combined to ensure the accuracy of the anti-dry burn function and avoid scale interference.
It achieves the accuracy and service life of the anti-dry burning function without changing the original structure, avoiding the influence of scale, and extending the service life of the equipment.
Smart Images
Figure CN223208216U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electronic control systems, in particular to a liquid dry-burning prevention system. Background Art
[0002] Water heaters are very common daily necessities and usually have an anti-dry-out function. The most common method is through water level detection. The water level detection method is that when the liquid level is lower than the water level sensor, the heating function automatically stops working. If there is a container with an automatic water filling function, such as a common tea boiling and water boiling base, water will be automatically added after the liquid level is lower than the water level sensor; another method is to use capacitance or current detection, which is also very common, but this method is more commonly used in devices such as atomizers; whether it is a water level sensor or capacitance current detection method, after a long period of use, scale will accumulate at the detection probe, resulting in inaccurate detection. Of course, different manufacturers have different understandings of the technical solutions for anti-dry-out methods, so a temperature detection anti-dry-out method is proposed. Utility Model Content
[0003] The purpose of the present invention is to provide a liquid dry-burn prevention system to solve the problems raised in the above background technology.
[0004] To achieve the above objectives, the present invention provides the following technical solutions:
[0005] A liquid dry-burn prevention system includes a container body, a heating component, and a temperature sensor, wherein the heating component and the temperature sensor are both electrically connected to a controller;
[0006] The heating component is provided at the bottom of the container body and is used to heat the liquid in the container body;
[0007] The temperature sensor is arranged on the side wall of the container body and close to the heating component, and is used to detect the temperature of the liquid and the inner cavity of the container body;
[0008] The controller includes a microprocessor, an output end of the microprocessor is electrically connected to a comparison module, an output end of the comparison module is electrically connected to a power-off module, an output end of the power-off module is electrically connected to an input end of the microprocessor, and an input end of the comparison module is electrically connected to a storage module.
[0009] According to a further technical solution, a timer 1 is provided between the comparison module and the power-off module.
[0010] A further technical solution further includes a capacitance detection module, wherein a detection end of the capacitance detection module and a detection end of the temperature sensor are located at the same height;
[0011] The comparison module includes a first comparator and a second comparator, wherein the first comparator and the second comparator are both electrically connected to an operator, and the operator is electrically connected to a power-off module;
[0012] The storage module includes storage 1 and storage 2. Storage 1 is electrically connected to comparator 1, and comparator 1 is used to calculate temperature detection results. Storage 2 is electrically connected to comparator 2, and comparator 2 is used to obtain capacitance detection results.
[0013] According to a further technical solution, the comparator 1 has two output terminals, one of which is electrically connected to the timer 3, and the timer 3 is electrically connected to the power-off module;
[0014] The second comparator has two output terminals, one of which is electrically connected to a fourth timer, and the fourth timer is electrically connected to the power-off module.
[0015] A further technical solution also includes a temperature control module, which is electrically connected to the microprocessor and is used to control the heat generated by the heating component.
[0016] A further technical solution also includes a plurality of timer 2s, wherein the plurality of timer 2s have different timing times.
[0017] Beneficial effects of the utility model:
[0018] Based on the above structure, under the premise that the existing technology has temperature sensors and heating components, there is no need to make major changes to the original structure, and the anti-burn-dry function can be achieved, and the interference of scale can be avoided, making the anti-burn-dry function more accurate and the service life longer.
[0019] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 : Overall structure diagram of the utility model.
[0021] Figure 2 :The controller logic of this utility model Figure 1 .
[0022] Figure 3 :The controller logic of this utility model Figure 2 .
[0023] Figure 4 :The controller logic of this utility model Figure 3 .
[0024] Figure markings: 1-container body, 2-heating component, 3-temperature sensor, 41-microprocessor, 42-comparison module, 421-comparator 1, 422-comparator 2, 423-arithmetic unit, 424-timer 3, 425-timer 4, 43-power-off module, 44-storage module, 441-storage 1, 442-storage 2, 45-timer 1, 46-temperature control module, 47-timer 2, 5-capacitance detection module. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.
[0026] Please refer to Figure 1-4 ;
[0027] The temperature detection and dry-boiling prevention system of the present invention is mainly used in containers with a water-boiling function. Usually, these containers have a heating element 2 and a temperature sensor 3. Therefore, the system can achieve the dry-boiling prevention function without changing the structure of the original water-boiling container as much as possible.
[0028] Specifically, it includes a container body 1, a heating component 2 and a temperature sensor 3. The heating component 2 and the temperature sensor 3 are both electrically connected to the controller. Under normal working conditions, the liquid in the container body 1 is heated by the heating component 2. Generally, the heating component 2 will heat the liquid in the container body 1 to 100°C, and the temperature sensor 3 can detect the temperature of the liquid in the container body 1 to facilitate multi-function operations such as constant temperature and timing. In this embodiment, the heating component 2 is arranged at the bottom of the container body 1, and the temperature sensor 3 is arranged on the side wall of the container body 1 and is arranged close to the bottom.
[0029] Example 1, refer to Figure 2 This embodiment describes how the liquid in the container body 1 is repeatedly boiled by repeatedly heating the heating component 2 to 100°C.
[0030] In this embodiment, the controller includes a microprocessor 41. The output end of the microprocessor 41 is electrically connected to a comparison module 42. The output end of the comparison module 42 is electrically connected to a power-off module 43. The output end of the power-off module 43 is electrically connected to the input end of the microprocessor 41. The input end of the comparison module 42 is electrically connected to a storage module 44. The storage module 44 stores a temperature value range.
[0031] When the liquid level is lower than the position of the temperature sensor 3, the heating component 2 heats the remaining water in the container body 1. When the water reaches 100°C, it will boil. Due to the increase in pressure in the container body 1, the water vaporizes and absorbs energy to form water vapor. That is, the energy of water vapor is higher than that of liquid water, so the temperature of the water vapor is higher. At this time, the inner cavity of the container body 1 is full of water vapor. The temperature detected by the temperature sensor 3 when it contacts the water vapor is higher than 100°C, and can reach 110-120°C, exceeding the preset threshold. At this time, the temperature sensor 3 inputs the detection data into the microprocessor 41, and the microprocessor 41 transmits the data to the comparison module 42. The comparison module 42 then obtains the threshold of the storage module 44. If the temperature value obtained by the temperature sensor 3 is greater than the threshold in the storage module 44, the comparison module 42 sends a signal to the power-off module 43, and then the power-off module 43 sends a signal to the microprocessor 41 to stop the heating component 2 from working, which can prevent the liquid in the container body 1 from being completely burned dry, that is, avoid the occurrence of dry burning.
[0032] Furthermore, since instantaneous temperature fluctuations may occur during the water boiling process, in order to avoid false alarms, a timer 45 is provided between the comparison module 42 and the power-off module 43. Before the power-off module 43 outputs a signal to the microprocessor 41 or before the comparison module 42 outputs a signal to the power-off module 43, a signal needs to be sent to the timer 45 first. For example, the timer 45 time is 5 seconds, that is, the temperature needs to be detected to be higher than the threshold for more than 5 seconds before a signal is output to stop the heating component 2 from working.
[0033] In another embodiment, based on the structure of the first embodiment, it is assumed that there is no liquid or very little liquid in the container body 1. When the heating element 2 is working, it will not generate a very high temperature. In this case, dry burning will occur, causing damage to the heating element 2. In this embodiment, the relationship between temperature and current driving the heating element 2 is inversely proportional to the existing technology to achieve dry burning prevention. That is, the temperature of the liquid is detected by the temperature sensor 3, and then the controller outputs the corresponding current to the heating element 2. The heating element 2 does not work for a long time, so a preset working time is set. Of course, the capacity of the container body 1 is configured in this way. For example, if the maximum working time of the heating element 2 is set to 5 minutes, the temperature of the liquid must be raised to 100°C, that is, 100°C is divided into 5 parts and increased by 20°C per minute. At the same time, it is necessary to cooperate with the temperature sensor 3 for detection. Assuming that the temperature of the liquid should reach 60°C in 3 minutes, if it does not reach 60°C, the system detects that it cannot reach 80°C in 4 minutes according to this trend. Therefore, after 3 minutes, the current output to the heating element 2 is increased to generate more heat to heat the liquid, so that the liquid can reach 80°C in 4 minutes.
[0034] This embodiment is based on the above principle. When there is no liquid or very little liquid in the container body 1, no matter how the heating component 2 heats up, the temperature in the container body 1 will not change much. At this time, the preset time of the timer 45 is 2 minutes, and the storage module 44 is preset to about 40°C. Under normal circumstances, the temperature sensor 3 should detect about 40°C after 2 minutes. Since it is in a dry-burning state, the temperature detected by the temperature sensor 3 after 2 minutes is that the temperature of the inner cavity of the container body 1 will be lower than the threshold value. The comparison module 42 will send a signal to the power-off module 43 or a signal to the timer 45. After maintaining this state for 2 minutes, a signal will be sent to the microprocessor 41 to stop the heating component 2.
[0035] It should be noted that the above time and temperature divisions are only used as examples and should not be used to limit the scope of protection. If some comparison modules 42 stop sending signals to timer 1 45 midway, timer 1 45 will be reset.
[0036] Based on the above structure, under the premise that the existing technology has a temperature sensor 3 and a heating component 2, there is no need to make major changes to the original structure, and the anti-burn-dry function can be achieved, and the interference of scale can be avoided, making the anti-burn-dry function more accurate and the service life longer.
[0037] Example 3, refer to Figure 3 , and also includes a capacitance detection module 5, the detection end of the capacitance detection module 5 and the detection end of the temperature sensor 3 are located at the same height; through the cooperation of the capacitance detection module 5 and the temperature sensor 3, double detection is achieved, which is more accurate.
[0038] The comparison module 42 includes a comparator 1 421 and a comparator 2 422, and the comparator 1 421 and the comparator 2 422 are both electrically connected to the operator 423, and the operator 423 is electrically connected to the power-off module 43; the storage module 44 includes a storage 1 441 and a storage 2 442, and the storage 1 441 is electrically connected to the comparator 1 421; the capacitance detection module 5 used in the present invention can specifically refer to the commonly used modules in the prior art; when working, the heating component 2 heats the liquid in the container body 1, and then detects the temperature of the inner cavity of the container body 1 through the temperature sensor 3 and inputs it into the comparator 1 421 and compares it with the threshold value in the storage 1 441. The values are compared, and if the value is not within the threshold range, a signal is output to the operator 423. At the same time, the water level capacitance value is detected by the capacitance detection module 5, and the data is input into the comparator 2 422 and the data of the storage 2 442 is obtained for comparison. If the obtained capacitance value is not within the threshold range, the comparator 2 outputs a signal to the operator 423. If the operator 423 receives the signals from the comparator 1 and the comparator 2 at the same time, it outputs a signal to the power-off module 43, and the power-off module 43 sends a signal to the controller to stop the heating component 2 from working. If the operator 423 only receives the signal from one of the comparators, it indicates that it is inaccurate and no signal will be sent to the power-off module 43.
[0039] Reference Figure 4 Another situation is that the capacitance detection module 5 or the temperature sensor 3 may be damaged, resulting in the signal being inconsistent. Therefore, in addition to sending signals to the operator 423, the comparator 1 421 and the comparator 2 422 are also separately connected to the timer 3 and the timer 4 425. Assuming that the capacitance detection module 5 is damaged, the comparator 2 cannot operate. In order to avoid the failure to realize the anti-dry-burning function, when the comparator 1 421 sends a signal to the operator 423, it also sends a signal to the timer 3 424. It should be noted that the preset time of the timer 3 and the timer 4 425 is greater than that of the timer 1 45. When the time of the timer 3 424 is up, it will still send a signal to the power-off module 43, thereby triggering the anti-dry-burning function.
[0040] In an embodiment of the present invention, a temperature control module 46 is further included. The temperature control module 46 is electrically connected to the microprocessor 41 and is used to control the heat generation of the heating component 2 to achieve a heat preservation function. The module also includes a plurality of timers 47. The plurality of timers 47 have different timing times. For example, there are three timers 47, which are 1 hour, 2 hours and 3 hours respectively. When in use, the corresponding time can be selected to start or shut down at the scheduled time.
[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.
[0042] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.
Claims
1. A liquid dry-burn prevention system, comprising a container body (1), a heating component (2) and a temperature sensor (3), wherein the heating component (2) and the temperature sensor (3) are both electrically connected to a controller, and is characterized in that: The heating component (2) is arranged at the bottom of the container body (1) and is used to heat the liquid in the container body (1); The temperature sensor (3) is arranged on the side wall of the container body (1) and is close to the heating component (2), and is used to detect the temperature of the liquid and the inner cavity of the container body (1); The controller comprises a microprocessor (41), an output end of the microprocessor (41) is electrically connected to a comparison module (42), an output end of the comparison module (42) is electrically connected to a power-off module (43), an output end of the power-off module (43) is electrically connected to an input end of the microprocessor (41), and an input end of the comparison module (42) is electrically connected to a storage module (44).
2. The liquid dry burning prevention system according to claim 1, characterized in that: A timer 1 (45) is provided between the comparison module (42) and the power-off module (43).
3. A liquid dry burning prevention system according to claim 1 or 2, characterized in that: It also includes a capacitance detection module (5), wherein a detection end of the capacitance detection module (5) and a detection end of the temperature sensor (3) are located at the same height; The comparison module (42) includes a comparator 1 (421) and a comparator 2 (422), and the comparator 1 (421) and the comparator 2 (422) are both electrically connected to an operator (423), and the operator (423) is electrically connected to the power-off module (43); The storage module (44) includes a storage device 1 (441) and a storage device 2 (442). The storage device 1 (441) is electrically connected to a comparator 1 (421). The comparator 1 (421) is used to calculate the temperature detection result. The storage device 2 (442) is electrically connected to a comparator 2 (422). The comparator 2 (422) is used to obtain the capacitance detection result.
4. The liquid dry burning prevention system according to claim 3, characterized in that: The comparator 1 (421) has two output terminals, one of which is electrically connected to the timer 3 (424), and the timer 3 (424) is electrically connected to the power-off module (43); The comparator 2 (422) has two output terminals, one of which is electrically connected to the timer 4 (425), and the timer 4 (425) is electrically connected to the power-off module (43).
5. The liquid dry burning prevention system according to claim 1, characterized in that: It also includes a temperature adjustment module (46), which is electrically connected to the microprocessor (41) and is used to control the heat generation of the heating component (2).
6. The liquid dry burning prevention system according to claim 1, characterized in that: It also includes a plurality of timer 2s (47), wherein the plurality of timer 2s (47) have different timing times.