Evaporator control method, evaporator and cooking equipment

Abstract

The invention provides an evaporator control method, an evaporator and cooking equipment, and relates to the technical field of smart home. The method comprises the steps of obtaining temperature data of an evaporator; wherein the temperature data comprises a plurality of temperature values collected based on a preset sampling frequency; determining a temperature change rate of the evaporator based on the temperature data; the working state of the evaporator is adjusted and an alarm signal is sent out based on the temperature change rate and a result obtained by comparing the current temperature value with a preset state condition; wherein the working state comprises heating power and water replenishing rate; the evaporator with the adjustable power is designed, the water supplementing rate and the evaporation power of the evaporator are controlled through the current temperature and the temperature change rate, mechanical water level detection is abandoned, and the problems caused by clamping stagnation of a mechanical structure are effectively avoided; according to the rate-adjustable water supplementing mode comprehensively judged according to the temperature and the temperature change rate and the power-adjustable evaporation mode, the fluctuation of steam pressure is reduced, the influence on cooking is reduced, and the user experience is improved.

Description

Technical Field

[0001] This invention relates to the field of smart home technology, and in particular to an evaporator control method, an evaporator, and a cooking appliance. Background Technology

[0002] Most existing cooking appliances that require steam are equipped with evaporators. Evaporators heat water to generate steam to achieve the cooking function, and water needs to be continuously replenished to maintain a safe water level. In traditional evaporators, most use a reed switch and a magnetic float to detect the water level. The working principle is that the float rises and falls with the water level, driving the internal magnet, triggering the reed switch to open and close the signal. The controller then judges the water level status and controls the water pump to replenish water.

[0003] However, traditional evaporators are prone to misjudgments due to scale buildup and magnetic float jamming, and their heating elements typically use a fixed power control method. When the water level is too low and water replenishment is triggered, the fixed-power heating element continues to heat at maximum power, while the injected room-temperature cold water instantly absorbs a large amount of heat, causing a sharp drop in the internal temperature of the evaporator and a corresponding drop in steam pressure. Once the cold water is heated to boiling, the continuous high-power heating will instantly generate excessive steam, forming a pressure spike. This drastic pressure fluctuation of "sudden drop-overshoot" disrupts the stability of the cooking environment, resulting in dry food surfaces, undercooked interiors, uneven textures upon reheating, and easy condensation within the cavity, severely affecting the cooking quality. Summary of the Invention

[0004] The purpose of this invention is to provide an evaporator control method, an evaporator, and a cooking device. The invention designs an evaporator with adjustable power, and controls the evaporator's water replenishment rate and evaporation power based on the current temperature and temperature change rate. It eliminates the need for mechanical water level detection, effectively avoiding problems caused by mechanical water level detection devices jamming due to their mechanical structure. The adjustable water replenishment method, determined comprehensively by temperature and temperature change rate, and the adjustable evaporation mode reduce steam pressure fluctuations, minimizing their impact on cooking and improving the user experience.

[0005] In a first aspect, the present invention provides an evaporator control method, wherein the evaporator includes a temperature sensor, a heating device, and a water inlet, the water inlet being connected to a corresponding water supply device, and the temperature sensor being used to detect the temperature of the evaporator; the method includes: Acquire temperature data from the evaporator; wherein the temperature data includes multiple temperature values ​​collected based on a preset sampling frequency; Determine the evaporator's temperature change rate based on temperature data; The evaporator's operating state is adjusted based on the temperature change rate and the current temperature value compared with preset state conditions, and / or an alarm signal is issued based on the temperature change rate and the current temperature value compared with preset state conditions; wherein, the operating state includes: heating power and water replenishment rate.

[0006] In some preferred embodiments of the present invention, the state conditions include: a maximum temperature and a maximum temperature change rate; adjusting the operating state of the evaporator based on the comparison of the temperature change rate and the current temperature value with preset state conditions, and / or issuing an alarm signal based on the comparison of the temperature change rate and the current temperature value with preset state conditions, includes: If the temperature value is greater than the maximum temperature, and if the rate of temperature change is greater than the maximum rate of temperature change, adjust the heating power to zero and adjust the water replenishment rate to the preset first rate.

[0007] In some preferred embodiments of the present invention, the step of adjusting the operating state of the evaporator based on the comparison between the temperature change rate and the current temperature value and preset state conditions further includes: If the temperature value is less than or equal to the maximum temperature, and if the rate of temperature change is greater than the maximum rate of temperature change, the heating power is adjusted to a preset first heating power and the water replenishment rate is adjusted to a preset second rate; wherein the second rate is less than the first rate.

[0008] In some preferred embodiments of the present invention, the state conditions further include: a first temperature change rate; the step of adjusting the operating state of the evaporator based on the temperature change rate and the result of comparing the current temperature value with preset state conditions further includes: If the temperature value is less than or equal to the maximum temperature, and if the rate of temperature change is greater than the first rate of temperature change and less than or equal to the maximum rate of temperature change, the heating power is adjusted to a preset second heating power and the water replenishment rate is adjusted to a preset third rate; wherein, the second heating power is greater than the first heating power; and the third rate is less than the second rate.

[0009] In some preferred embodiments of the present invention, the step of adjusting the operating state of the evaporator based on the comparison between the temperature change rate and the current temperature value and preset state conditions further includes: If the temperature value is less than or equal to the maximum temperature, and if the rate of temperature change is greater than zero and less than the first rate of temperature change, the heating power is adjusted to the second heating power.

[0010] In some preferred embodiments of the present invention, the step of adjusting the operating state of the evaporator based on the comparison between the temperature change rate and the current temperature value and preset state conditions further includes: If the temperature value is less than or equal to the maximum temperature, and if the rate of temperature change is less than zero, the heating power is adjusted to the preset third heating power; wherein the third heating power is greater than the second heating power.

[0011] In some preferred embodiments of the present invention, the heating power is adjusted by a silicon controlled rectifier (SCR).

[0012] In some preferred embodiments of the present invention, the water replenishment rate is adjusted by a PWM-controlled electromagnetic proportional valve.

[0013] In some preferred embodiments of the present invention, the alarm signals include: temperature sensor fault alarm, water shortage and dry burning alarm, and heating element malfunction alarm. If the temperature value is greater than the maximum temperature value, and if the rate of temperature change is less than the maximum rate of temperature change, a temperature sensor fault alarm will be issued. After adjusting the heating power to zero and the water replenishment rate to the preset first rate, if the temperature change rate is greater than zero after a preset first time, a water shortage and dry burning alarm will be issued. After adjusting the heating power to zero and the water replenishment rate to the preset first rate, if the temperature change rate is less than or equal to zero and the temperature value is still greater than the maximum temperature value after a preset second time, an alarm for abnormal operation of the heating element will be issued.

[0014] Secondly, the present invention provides an evaporator, which includes a temperature sensor, a heating device, and a water inlet. The water inlet is connected to a corresponding water supply device, and the temperature sensor is used to detect the temperature of the evaporator.

[0015] In a second aspect, the present invention provides a cooking apparatus including the evaporator provided in the second aspect above.

[0016] This invention brings the following beneficial effects: This invention provides an evaporator control method, an evaporator, and a cooking device. The method includes: acquiring temperature data of the evaporator; wherein the temperature data includes: collecting multiple temperature values ​​based on a preset sampling frequency; determining the temperature change rate of the evaporator based on the temperature data; adjusting the working state of the evaporator based on the temperature change rate and the current temperature value compared with preset state conditions; and / or issuing an alarm signal based on the temperature change rate and the current temperature value compared with preset state conditions; wherein the working state includes: heating power and water replenishment rate; designing an evaporator with adjustable power, and controlling the water replenishment rate and evaporation power of the evaporator through the current temperature and temperature change rate, eliminating mechanical water level detection, effectively avoiding problems caused by mechanical structure jamming, and reducing steam pressure fluctuations by a rate-adjustable water replenishment method and a power-adjustable evaporation mode determined comprehensively by temperature and temperature change rate, thereby reducing the impact on cooking and improving the user experience. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A flowchart of an evaporator control method provided in an embodiment of the present invention; Figure 2 A flowchart of another evaporator control method provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of an evaporator provided in an embodiment of the present invention.

[0019] Icons: 1-Evaporator outlet; 2-First wire of heating element; 3-Second wire of heating element; 4-High temperature resistant wire; 5-Temperature sensor; 6-Evaporator inlet; 7-Metal heating wire; 8-Evaporator cavity. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. 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, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 this invention based on the specific circumstances.

[0026] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] Example 1 This invention provides an evaporator control method. The evaporator includes a temperature sensor, a heating device, and a water inlet. The water inlet is connected to a corresponding water supply device. The temperature sensor is used to detect the temperature of the evaporator. (See also...) Figure 1 The flowchart shown in this embodiment of the invention provides an evaporator control method, which includes: Step S102: Obtain the temperature data of the evaporator; wherein, the temperature data includes: multiple temperature values ​​collected based on a preset sampling frequency.

[0028] Specifically, this embodiment employs a high-precision platinum resistance temperature sensor 5, which is tightly fitted to the outer wall of the evaporator heating tube via a mounting bracket. Aluminum nitride thermal paste is filled at the contact surface to reduce thermal resistance, ensuring accurate temperature measurement and fast response. Temperature data is acquired at a frequency of once per second (Δt=1s), yielding a series of continuous temperature values ​​T. nThis high-frequency, high-precision data acquisition scheme lays the data foundation for subsequent real-time and accurate calculation of temperature change trends, fundamentally replacing the traditional, easily failing mechanical water level sensor.

[0029] Step S104: Determine the temperature change rate of the evaporator based on the temperature data.

[0030] Specifically, the system calculates the temperature based on continuously collected temperature values ​​according to the formula. The system calculates the current temperature change rate slope (K value) in real time, in °C / s. This slope (K value) sensitively reflects the changing trend of water volume in the evaporator: when the water volume is sufficient, heat is absorbed by the water, the temperature stabilizes near the boiling point, and the K value is small; when the water volume is insufficient, heat cannot be effectively absorbed, causing the evaporator body temperature to rise sharply, and the K value increases significantly. By monitoring the K value, the system can achieve early, indirect prediction of the risk of "dry burning".

[0031] Step S106: Adjust the working state of the evaporator based on the temperature change rate and the current temperature value compared with preset state conditions, and / or issue an alarm signal based on the temperature change rate and the current temperature value compared with preset state conditions; wherein, the working state includes: heating power and water replenishment rate.

[0032] Specifically, referring to Table 1, which shows the evaporator control mechanism and operation diagram, in this embodiment of the invention, a control mechanism based on real-time temperature T is constructed. n The two-parameter state judgment matrix is ​​input along with the temperature change rate K. This is achieved by... n K) and multiple preset thresholds (such as T) max K max By combining and comparing K1), the system can accurately determine the different operating states of the evaporator (such as dry burning and water shortage, critical water shortage, normal water volume, and excessive water replenishment); among which, T max This is an absolute temperature threshold (e.g., 110°C), indicating a high-temperature risk; exceeding this value may result in dry burning; K max The slope of the critical temperature change indicates that the reaction temperature rises rapidly, the water level in the evaporator is below the normal value, water needs to be added and the evaporator power reduced; a slope greater than K1 indicates that the water in the evaporator is boiling, the water volume is low, and the water temperature detected by temperature sensor 5 shows a tendency to rise above the boiling point. At this time, appropriate water needs to be added and the normal operating power setting P2 should be maintained; when the K value is in the range of 0-K1, the water temperature tends to stabilize, the water volume is normal, the power setting is normal operating power setting P2, and the water replenishment rate is W1.

[0033] According to (T) n ,K) and (such as T) max K max, K1) The result of the combined comparison dynamically and cooperatively adjusts the power levels (P1, P2, P3) of the heating tubes and the flow rates (W1, W2, W3) of the water replenishing mechanism, thus forming a closed-loop control system; where the heating power levels are P1 < P2 < P3, with the unit being W, and the actual values need to be determined according to the overall performance of the machine and are obtained through experimental verification; the water replenishing rate levels are W1 < W2 < W3, with the unit being ml / s, and the actual values need to be determined according to the overall performance of the machine and are obtained through experimental verification.

[0034] This intelligent regulation based on state recognition replaces the traditional fixed power or simple on / off control, effectively avoiding the steam pressure fluctuations caused by sudden power changes or improper water replenishment, and significantly improving the stability of steam output and cooking quality.

[0035] Table 1

[0036] Furthermore, in some preferred embodiments of the present invention, the heating power is adjusted by a thyristor.

[0037] Specifically, the main control unit outputs a trigger signal to control the conduction angle of the thyristor, achieving chopper control of the input voltage of the heating tube, thereby continuously adjusting the output power of the heating tube, enabling it to smoothly switch between multiple power levels such as P1, P2, P3, and avoiding the sudden power change brought by the traditional relay on / off control.

[0038] Furthermore, in some preferred embodiments of the present invention, the water replenishing rate is adjusted by an electromagnetic proportional valve controlled by PWM.

[0039] Specifically, the main control unit outputs a PWM signal with an adjustable duty cycle to drive the electromagnetic proportional valve, and precisely adjusts the water replenishing flow rate among multiple levels such as W1, W2, W3 by changing the valve opening.

[0040] By continuously adjusting the heating power with a thyristor and precisely adjusting the water replenishing rate in combination with an electromagnetic proportional valve controlled by PWM, the solution provided by the embodiments of the present invention achieves dynamic cooperative control of heating and water replenishment. When the K value of the temperature change rate reflects the change in the water level state, the main control unit can smoothly adjust the heating power level and synchronously match the corresponding water replenishing rate, effectively solving the problem of severe steam pressure fluctuations caused by sudden changes in heat load during water replenishment for traditional fixed-power evaporators, enabling the evaporator to always operate in a heat-water balance state, ensuring the continuous stability of steam output, and thus improving cooking quality.

[0041] This invention provides an evaporator control method, comprising: acquiring temperature data of the evaporator; wherein the temperature data includes: collecting multiple temperature values ​​based on a preset sampling frequency; determining the temperature change rate of the evaporator based on the temperature data; adjusting the working state of the evaporator based on the temperature change rate and the current temperature value compared with preset state conditions; and / or issuing an alarm signal based on the temperature change rate and the current temperature value compared with preset state conditions; wherein the working state includes: heating power and water replenishment rate; designing an evaporator with adjustable power, and controlling the water replenishment rate and evaporation power of the evaporator through the current temperature and temperature change rate, eliminating mechanical water level detection, effectively avoiding problems caused by mechanical structure jamming, and reducing steam pressure fluctuations by a rate-adjustable water replenishment method and a power-adjustable evaporation mode determined comprehensively by temperature and temperature change rate, thereby reducing the impact on cooking and improving the user experience.

[0042] Example 2 Based on the above embodiments, see Figure 2 The flowchart shown is another evaporator control method provided by an embodiment of the present invention. This embodiment of the present invention provides another evaporator control method, which achieves more precise temperature, water replenishment and alarm control of the evaporator based on multi-stage temperature monitoring and multi-level temperature change rate monitoring.

[0043] In some preferred embodiments of the present invention, the state conditions include: a maximum temperature and a maximum temperature change rate; adjusting the working state of the evaporator based on the result of comparing the temperature change rate and the current temperature value with preset state conditions, and / or issuing an alarm signal based on the result of comparing the temperature change rate and the current temperature value with preset state conditions, including: if the temperature value is greater than the maximum temperature, and if the temperature change rate is greater than the maximum temperature change rate, adjusting the heating power to zero and adjusting the water replenishment rate to a preset first rate.

[0044] Specifically, when T is satisfied simultaneously n >T max (e.g., 110°C) and K>K max At this point, the system determines that the evaporator is in an emergency state of "dry burning and water shortage." To prevent equipment damage and safety accidents, the system immediately executes the highest level of protection: reducing the heating element power to zero (shutting down heating) and simultaneously activating the maximum rate W3 for emergency water replenishment to cool and wet the evaporator as quickly as possible. This control logic corresponds to... Figure 2 The S05-S06-S07-S08-S09-S10 links constitute the "forced shutdown" and rapid recovery links in the three-level protection mechanism.

[0045] Furthermore, in some preferred embodiments of the present invention, the step of adjusting the working state of the evaporator based on the comparison between the temperature change rate and the current temperature value and the preset state conditions further includes: if the temperature value is less than or equal to the maximum temperature value, and if the temperature change rate is greater than the maximum temperature change rate, adjusting the heating power to a preset first heating power and adjusting the water replenishment rate to a preset second rate; wherein the second rate is less than the first rate.

[0046] Specifically, when T is satisfied n ≤ T max But K>K max At this point, the system determines the evaporator to be in a "critical water shortage" state. This state indicates that the water level in the evaporator is severely insufficient, the temperature is rising extremely rapidly, but the absolute temperature has not yet reached the danger threshold. There is a risk of dry burning, but it has not yet occurred. The system then takes preventative measures: reducing the heating power to a lower setting P1 to reduce heat generation, while simultaneously replenishing water at a moderate rate W2 to suppress further temperature increases and gradually restore the water level. This operation corresponds to... Figure 2 The S05-S06-S14-S18 links in the system embody the secondary protection logic of "early warning → power reduction and water replenishment", enabling early intervention against potential risks.

[0047] Furthermore, in some preferred embodiments of the present invention, the state conditions further include: a first temperature change rate; the step of adjusting the working state of the evaporator based on the temperature change rate and the current temperature value compared with preset state conditions further includes: if the temperature value is less than or equal to the maximum temperature value, and if the temperature change rate is greater than the first temperature change rate and less than or equal to the maximum temperature change rate, adjusting the heating power to a preset second heating power and adjusting the water replenishment rate to a preset third rate; wherein the second heating power is greater than the first heating power; and the third rate is less than the second rate.

[0048] Specifically, when T is satisfied n ≤ T max And K1 <K ≤ K max At this point, the system determines that the evaporator is in a normal operating state with "low water volume." At this time, the water in the evaporator is boiling, but the volume is low, and the temperature tends to be slightly above the boiling point. The system control strategy is to maintain the heating element at a relatively high operating power P2 to ensure continuous steam production; simultaneously, to perform a small amount of water replenishment at a low replenishment rate W1 to maintain a dynamic balance of the water level. This corresponds to... Figure 2 The S15-S16-S17-S18 link enables precise water level management while ensuring cooking results.

[0049] Further, in some preferred embodiments of the present invention, the step of adjusting the operating state of the evaporator based on the results of comparing the temperature change rate and the current temperature value with the preset state conditions further includes: if the temperature value is less than or equal to the maximum temperature, and if the temperature change rate is greater than zero and less than the first temperature change rate, adjusting the heating power to the second heating power.

[0050] Specifically, when T n ≤ T max and 0 < K ≤ K1 are satisfied, the system determines the ideal operating state of "sufficient water volume". At this time, the temperature rises slowly or remains stable, and the water volume is sufficient. The system maintains the heating tube at the normal power P2 and stops water replenishment. This can avoid unnecessary water replenishment from causing a sudden drop in the evaporator temperature, thereby maintaining the stability and energy efficiency of steam generation. This logic corresponds to Figure 2 the links such as S19 - S16 - S21 - S18 in

[0051] Further, in some preferred embodiments of the present invention, the step of adjusting the operating state of the evaporator based on the results of comparing the temperature change rate and the current temperature value with the preset state conditions further includes: if the temperature value is less than or equal to the maximum temperature, and if the temperature change rate is less than zero, adjusting the heating power to the preset third heating power; wherein, the third heating power is greater than the second heating power.

[0052] Specifically, when T n ≤ T max and K ≤ 0 are satisfied, the system determines the state of "over - water replenishment". This state is usually caused by excessive water replenishment in the early stage or suddenly adding a large amount of cold water, resulting in a drop in the evaporator temperature. To quickly return to the normal operating temperature, the strategy adopted by the system is: stop water replenishment, and at the same time increase the heating power to the highest gear P3 to heat at the maximum power, so as to prompt the system to quickly return to the boiling steam - generating state. This reflects the strong self - recovery and adaptability of the system, corresponding to Figure 2 the link S05 - S15 - S19 - S16 - S22 - S18 in

[0053] Furthermore, in some preferred embodiments of the present invention, the alarm signals include: temperature sensor fault alarm, water shortage and dry burning alarm, and heating element malfunction alarm; if the temperature value is greater than the maximum temperature, and if the temperature change rate is less than the maximum temperature change rate, a temperature sensor fault alarm is issued; after adjusting the heating power to zero and the water replenishment rate to a preset first rate, after a preset first time, if the temperature change rate is greater than zero, a water shortage and dry burning alarm is issued; after adjusting the heating power to zero and the water replenishment rate to a preset first rate, after a preset second time, if the temperature change rate is less than or equal to zero, and the temperature value is still greater than the maximum temperature, a heating element malfunction alarm is issued.

[0054] Specifically, when T is satisfied n >T max But K ≤ K max At this time, the system triggers a temperature sensor fault alarm. Logically, if the evaporator is not in a dry-burning state (K value is not high), its temperature should theoretically not exceed T. max The appearance of a high temperature reading at this point is highly likely due to drift, damage, or circuit failure of temperature sensor 5 itself, resulting in an incorrect signal. This design adds a fault diagnosis mechanism, improving system reliability. Figure 2 The S05(S15 / S19)-S16-S20 link in the middle.

[0055] After performing the emergency water replenishment action in the dry-burning state, the system will wait for a preset time (t1). If the temperature change rate K is still greater than 0 after this period, it indicates that the temperature is still rising after heating has stopped and a large amount of water has been added. This usually means that the external water tank is low on water, the water replenishment has failed, and the dry-burning situation cannot be effectively alleviated. At this time, the system issues a "water shortage and dry-burning alarm," prompting the user to check and replenish the water supply in the water tank. This is the final warning and user reminder regarding the risk of dry-burning.

[0056] Similarly, after emergency water replenishment, if the system detects a temperature change rate K ≤ 0, it indicates that the water replenishment has had a cooling effect, and the temperature has stopped rising or begun to fall. However, the temperature value T at this time remains unchanged. n Still above the safety threshold T max This contradictory phenomenon indicates that although the system has issued a command to shut down the heating element, the heating element may not actually disconnect due to faults such as relay sticking or SCR breakdown, and may continue to heat. Based on this, the system issues a "heating element malfunction alarm," thus achieving fault monitoring of critical components and constituting another important layer of safety protection.

[0057] Example 3 Based on the above embodiments, this invention provides an evaporator, which includes a temperature sensor, a heating device, and a water inlet. The water inlet is connected to a corresponding water supply device, and the temperature sensor is used to detect the temperature of the evaporator.

[0058] See Figure 3 The schematic diagram of an evaporator provided in this embodiment of the invention shows that the steam generated in the evaporator is discharged into the cavity of the cooking device through the steam outlet 1 of the evaporator; the first wire 2 and the second wire 3 of the heating tube are both connected to the metal heating wire 7 of the heating tube through a high-temperature resistant connector; the high-temperature resistant wire 4 is connected to the temperature sensor 5, and the signal data collected by the temperature sensor 5 is transmitted to the main control unit through the wire; the high-precision temperature sensor 5 is in direct contact with the metal shell of the evaporator and detects the temperature at the corresponding position in real time; one end of the water inlet 6 of the evaporator is connected to the evaporator, and the other end is connected to the water pump; the metal heating wire 7 of the heating tube is tightly attached to the shell of the evaporator through a casting process, and heats the water in the evaporator after being powered on; the main function of the cavity 8 of the metal evaporator is to store a certain amount of water, and the water from the water pump enters the internal cavity through the water inlet.

[0059] Furthermore, the temperature sensor 5 is a platinum resistance temperature sensor, which is fixed to the outer wall of the integrated evaporator heating tube by a mounting bracket. The space between the sensor and the evaporator wall is filled with aluminum nitride thermal paste. The use of a platinum resistance temperature sensor and the elimination of contact thermal resistance by filling with high thermal conductivity aluminum nitride thermal paste can significantly improve the accuracy and response speed of temperature detection, ensuring that the main control unit can obtain the true temperature change trend in real time. At the same time, the sensor is firmly installed on the outer wall of the heating tube by the mounting bracket, which can effectively avoid the risk of displacement or falling off under high temperature vibration environment, thereby providing stable and reliable data support for the dynamic power adjustment and dry burning prediction control logic of the evaporator.

[0060] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the evaporator described above can be referred to the corresponding process in the aforementioned embodiments of the evaporator control method, and will not be repeated here.

[0061] Example 4 Based on the above embodiments, the present invention provides a cooking device, including the evaporator provided in the above embodiments.

[0062] Specifically, the cooking equipment includes a housing, a cooking cavity located within the housing, and an evaporator as provided in the above embodiment; the steam outlet of the evaporator is connected to the cooking cavity for supplying steam into the cooking cavity; the water inlet of the evaporator is connected to a water replenishment device; the main control unit calculates the temperature change rate based on the real-time collected temperature data, and dynamically adjusts the heating power of the heating element and the water replenishment rate of the water replenishment device according to the temperature change rate and the current temperature value.

[0063] By integrating the aforementioned evaporator and its control method into the cooking equipment, the equipment can accurately predict the risk of dry burning and dynamically maintain the heat-water balance of the evaporator without the need for a physical water level sensor. This ensures the continuity and stability of steam output during cooking, significantly improving cooking quality. At the same time, it reduces the failure rate caused by scale buildup or sensor failure, thereby increasing the reliability and service life of the equipment.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An evaporator control method, characterized in that, The evaporator includes a temperature sensor, a heating device, and a water inlet. The water inlet is connected to a corresponding water supply device. The temperature sensor is used to detect the temperature of the evaporator. The method includes: Acquire temperature data of the evaporator; wherein, the temperature data includes: multiple temperature values ​​collected based on a preset sampling frequency; The temperature change rate of the evaporator is determined based on the temperature data; The operating state of the evaporator is adjusted based on the temperature change rate and the current temperature value compared with preset state conditions, and / or an alarm signal is issued based on the temperature change rate and the current temperature value compared with preset state conditions; wherein, the operating state includes: heating power and water replenishment rate.

2. The evaporator control method according to claim 1, characterized in that, The state conditions include: maximum temperature and maximum temperature change rate; the steps of adjusting the operating state of the evaporator based on the temperature change rate and the current temperature value compared with preset state conditions, and / or issuing an alarm signal based on the temperature change rate and the current temperature value compared with preset state conditions, include: If the temperature value is greater than the maximum temperature value, and if the temperature change rate is greater than the maximum temperature change rate, the heating power is adjusted to zero and the water replenishment rate is adjusted to a preset first rate.

3. The evaporator control method according to claim 2, characterized in that, The step of adjusting the operating state of the evaporator based on the temperature change rate and the result of comparing the current temperature value with preset state conditions further includes: If the temperature value is less than or equal to the maximum temperature, and if the temperature change rate is greater than the maximum temperature change rate, the heating power is adjusted to a preset first heating power and the water replenishment rate is adjusted to a preset second rate; wherein the second rate is less than the first rate.

4. The evaporator control method according to claim 3, characterized in that, The state conditions further include: a first temperature change rate; the step of adjusting the operating state of the evaporator based on the temperature change rate and the result of comparing the current temperature value with preset state conditions further includes: If the temperature value is less than or equal to the maximum temperature, and if the temperature change rate is greater than the first temperature change rate and less than or equal to the maximum temperature change rate, the heating power is adjusted to a preset second heating power and the water replenishment rate is adjusted to a preset third rate; wherein the second heating power is greater than the first heating power; and the third rate is less than the second rate.

5. The evaporator control method according to claim 4, characterized in that, The step of adjusting the operating state of the evaporator based on the temperature change rate and the result of comparing the current temperature value with preset state conditions further includes: If the temperature value is less than or equal to the maximum temperature, and if the temperature change rate is greater than zero and less than the first temperature change rate, the heating power is adjusted to the second heating power.

6. The evaporator control method according to claim 5, characterized in that, The step of adjusting the operating state of the evaporator based on the temperature change rate and the result of comparing the current temperature value with preset state conditions further includes: If the temperature value is less than or equal to the maximum temperature, and if the rate of temperature change is less than zero, the heating power is adjusted to a preset third heating power; wherein the third heating power is greater than the second heating power.

7. The evaporator control method according to claim 2, characterized in that, The heating power is adjusted by a silicon controlled rectifier (SCR); the water replenishment rate is adjusted by a PWM-controlled electromagnetic proportional valve.

8. The evaporator control method according to claim 2, characterized in that, The alarm signals include: temperature sensor fault alarm, water shortage and dry burning alarm, and heating element malfunction alarm. If the temperature value is greater than the maximum temperature value, and if the temperature change rate is less than the maximum temperature change rate, a temperature sensor fault alarm is issued; After adjusting the heating power to zero and the water replenishment rate to a preset first rate, if the temperature change rate is greater than zero after a preset first time, the water shortage and dry burning alarm will be issued. After adjusting the heating power to zero and the water replenishment rate to a preset first rate, if the temperature change rate is less than or equal to zero and the temperature value is still greater than the maximum temperature value after a preset second time, an alarm for abnormal operation of the heating element is issued.

9. An evaporator, characterized in that, The evaporator includes a temperature sensor, a heating device, and a water inlet. The water inlet is connected to a corresponding water supply device, and the temperature sensor is used to detect the temperature of the evaporator.

10. A cooking device, characterized in that, Includes the evaporator as described in claim 9.

Images