Temperature control method and device of instant heating equipment, electronic device and storage medium

Abstract

This application relates to a temperature control method, apparatus, electronic device, and storage medium for instantaneous heating equipment. The method includes: obtaining a target temperature from a received extraction command and retrieving extraction control parameters corresponding to the target temperature from a preset parameter library. These extraction control parameters include a preheating temperature, a strong heating time, and an initial duty cycle during the steady-state phase. After controlling the heater of the target equipment to preheat the heating element to the preheating temperature according to a set preheating mode, the heater is then controlled to strongly heat the heating element pumped with cold water according to the target duty cycle during the strong heating time. The temperature change rate of the heating element after strong heating is determined, and the initial duty cycle is corrected based on the temperature change rate. The heater is then controlled to heat the heating element according to the corrected heating duty cycle. This application employs preheating energy storage + strong heating segmented control, providing sufficient heat immediately upon pump startup and effectively suppressing the sudden temperature drop caused by cold water impact.

Description

Technical Field

[0001] This application relates to the field of liquid heating control technology, and in particular to temperature control methods, devices, electronic devices, and storage media for instantaneous heating equipment. Background Technology

[0002] Instant coffee machines are widely used in commercial and home coffee machines because they do not require preheating and can be used immediately. However, coffee extraction has extremely strict requirements for water temperature (usually 92℃ to 94℃ with fluctuations of less than ±2℃), while the amount of water extracted at one time is only tens of milliliters and the water extraction time is only a few seconds, which places extremely high demands on temperature control.

[0003] In related technologies, PID control technology is used to control the water temperature during coffee machine extraction. However, existing PID control technology has the following drawbacks: First, it has a slow response time. During coffee machine extraction, water needs to be dispensed in a very short time. Within this time, the PID has not yet completed its adjustment, resulting in an inability to effectively correct for temperature differences. Second, it cannot effectively resist cold water shocks. Third, it suffers from integral saturation. The error is large when starting at low temperatures, and the integral term accumulates rapidly, leading to severe overshoot (steam injection) after reaching the target temperature. Meanwhile, related technologies attempt to achieve zoned control through multiple temperature sensors or temperature control through lookup tables and PID fine-tuning, but these still fail to effectively solve the problem of dynamic response in a very short time.

[0004] Currently, no effective solution has been proposed for the problems of response lag and inability to effectively suppress cold water shock in the temperature control methods of related technologies. Summary of the Invention

[0005] This application provides a method, apparatus, electronic device, and storage medium for controlling the temperature of an instantaneous heating device, in order to at least solve the problems of slow response and inability to effectively suppress cold water shock in the temperature control methods of the related art.

[0006] In a first aspect, embodiments of this application provide a temperature control method for an instant heating device, comprising: obtaining a target temperature from a received extraction command, and obtaining extraction control parameters corresponding to the target temperature from a preset parameter library, wherein the extraction control parameters include a preheating temperature, a strong heating time, and an initial duty cycle of the steady-state phase; after controlling the heater of the coffee machine to preheat the heating element to the preheating temperature according to a set preheating mode, controlling the heater to strongly heat the heating element pumped with cold water according to the target duty cycle during the strong heating time; determining the temperature change rate of the heating element after strong heating, correcting the initial duty cycle according to the temperature change rate, and controlling the heater to heat the heating element according to the corrected heating duty cycle to output water at a stable temperature.

[0007] Secondly, embodiments of this application provide a temperature control device for an instant heating device, comprising: The acquisition module is used to acquire the target temperature from the received extraction command and acquire the extraction control parameters corresponding to the target temperature from the preset parameter library. The extraction control parameters include the preheating temperature, the strong heating time, and the initial duty cycle of the steady-state stage. The control module is used to control the heater of the coffee machine to preheat the heating element to the preheating temperature according to the set preheating mode, and then control the heater to strongly heat the heating element pumped with cold water according to the target duty cycle during the strong heating time. The processing module is used to determine the temperature change rate of the heating element after strong heating, correct the initial duty cycle according to the temperature change rate, and control the heater to heat the heating element according to the corrected heating duty cycle to output water at a stable temperature.

[0008] Thirdly, embodiments of this application provide an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the temperature control method for the instantaneous heating device as described in the first aspect.

[0009] Fourthly, embodiments of this application provide a storage medium storing a computer program that, when executed by a processor, implements the steps of the temperature control method for the instantaneous heating device as described in the first aspect above.

[0010] Compared to related technologies, the temperature control method, apparatus, electronic device, and storage medium for instant heating devices provided in this application embodiment obtain the target temperature from the received extraction command and retrieve the extraction control parameters corresponding to the target temperature from a preset parameter library. The extraction control parameters include a preheating temperature, a strong heating time, and an initial duty cycle during the steady-state phase. After controlling the coffee machine's heater to preheat the heating element to the preheating temperature according to the set preheating mode, the heater is then controlled to strongly heat the pumped cold water heating element according to the target duty cycle during the strong heating time. The heating element that has completed strong heating is then determined. The initial duty cycle is corrected based on the temperature change rate, and the heater is controlled to heat the heating element according to the corrected heating duty cycle to output water at a stable temperature. Through preheating energy storage + strong heating segmented control, sufficient heat can be provided at the moment the pump starts, effectively suppressing the sudden temperature drop caused by cold water impact. The temperature change trend is sensed in real time and the power is adjusted in advance to further suppress fluctuations. This solves the problem that the temperature control method in related technologies is prone to response lag and cannot effectively suppress cold water impact. It achieves the beneficial effects of fast response, effective suppression of cold water impact, and adaptive voltage fluctuation.

[0011] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a hardware structure block diagram of a terminal that runs the temperature control method of the instantaneous heating device according to the embodiments of this application; Figure 2 This is a flowchart of a temperature control method for an instantaneous heating device according to an embodiment of this application; Figure 3 This is a structural block diagram of a test program generation apparatus according to an embodiment of this application. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application. Furthermore, it is understood that although the efforts made in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, modifications to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0014] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0015] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "a," "an," "an," "the," and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms "comprising," "including," "having," and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. "Multiple stages" used in this application refers to two or more stages. "And / or" describes the relationship between related objects, indicating that three relationships may exist; for example, "A and / or B" can represent: A alone, A and B simultaneously, and B alone. The terms "first," "second," "third," etc., used in this application are merely to distinguish similar objects and do not represent a specific ordering of objects.

[0016] The method embodiments provided in this example can be executed on a terminal, computer, or similar computing device. Taking running on a terminal as an example, Figure 1 This is a hardware structure block diagram of a terminal running the temperature control method of the instantaneous heating device according to an embodiment of this application. For example... Figure 1 As shown, a terminal may include one or more ( Figure 1 Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data are also shown. Optionally, the terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the terminal described above. For example, the terminal may also include components that are more... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0017] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the temperature control method of the instantaneous heating device in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby implementing the above-described method. The memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0018] The transmission device 106 is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by the terminal's communication provider. In one example, the transmission device 106 includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission device 106 may be a Radio Frequency (RF) module used for wireless communication with the Internet.

[0019] This embodiment provides a temperature control method for an instant heating device operating on the aforementioned terminal. Figure 2 This is a flowchart of a temperature control method for an instantaneous heating device according to an embodiment of this application, such as... Figure 2 As shown, the process includes the following steps: Step S201: Obtain the target temperature from the received extraction command and obtain the extraction control parameters corresponding to the target temperature from the preset parameter library. The extraction control parameters include the preheating temperature, the strong heating time, and the initial duty cycle of the steady-state stage.

[0020] In this embodiment, the executing entity of the temperature control method of this application includes, but is not limited to, the main control unit (microcomputer system, MCU) of the target device (e.g., coffee machine, hot water dispenser); in this embodiment, for the target temperature commonly used by the target device (at least including 89°C and 90°C), the extraction control parameter set corresponding to each set of target temperatures is obtained through experimental calibration. Each set of extraction control parameters includes the preheating temperature T. pre Intensive heating time t high Steady-state duty cycle D steady (Corresponding to the initial duty cycle), where the preheating temperature T pre This indicates the temperature the heating element needs to reach before extraction can begin, and the intense heating time t. highThe steady-state duty cycle D represents the time during which the pump heats water continuously at 100% power after starting and adding cold water. steady The duty cycle represents the percentage of time the water temperature is maintained after the intense heating phase ends. In this embodiment, the duty cycle represents the percentage of heating time. For example, if the period of a certain phase is set to T seconds, when the duty cycle is 60%, the corresponding heating time of the heater is 0.6T, and within each unit period of period T, 60% of the time is in the heating working state. It is understood that the duty cycle described in the embodiments of this application is clear and known to those skilled in the art.

[0021] Step S202: After the heater of the target device is preheated to the preheating temperature according to the set preheating mode, the heater is controlled to strongly heat the heating element pumped into the cold water according to the target duty cycle during the strong heating time.

[0022] In this embodiment, upon receiving the extraction command, the target temperature T is obtained. r And read the corresponding preheating temperature T from the parameter library. pre Then, the heater is controlled to heat the heating element to the preheating temperature T at maximum power. pre Rapid preheating is implemented; during the preheating process, the temperature of the heating element is monitored in real time.

[0023] In this embodiment, the water pump is started immediately after preheating, and then the heater is controlled to heat the heating element in a segmented mode of strong heating stage and steady-state maintenance stage; in this embodiment, the strong heating stage begins when the water pump is started to replenish water, and the strong heating time t is reached. high Inside, it is heated at 100% duty cycle (target duty cycle) to quickly compensate for the impact of cold water.

[0024] Step S203: Determine the temperature change rate of the heating element after strong heating is completed, correct the initial duty cycle according to the temperature change rate, and control the heater to heat the heating element according to the corrected heating duty cycle to output water at a stable temperature.

[0025] In this embodiment, after the intense heating ends, the system switches to the steady-state maintenance phase, which means switching to the steady-state duty cycle D corresponding to the steady-state phase. steady (Corresponding to the initial duty cycle) control the operation of the heating element; In this embodiment, during the steady-state maintenance phase, the outlet water temperature is sampled periodically at the target time, the temperature change rate is calculated, the steady-state duty cycle (the initial duty cycle at the corresponding time) is dynamically corrected according to the change rate, and the heater is controlled to heat the heating element with the corrected steady-state duty cycle to maintain the stability of the outlet water temperature.

[0026] Through steps S201 to S203, the target temperature is obtained from the received extraction command, and the extraction control parameters corresponding to the target temperature are obtained from the preset parameter library. The extraction control parameters include preheating temperature, strong heating time, and initial duty cycle of the steady-state stage. After the heater of the target device is preheated to the preheating temperature according to the set preheating mode, the heater is controlled to strongly heat the heating element pumped into the cold water according to the target duty cycle during the strong heating time. The temperature change rate of the heating element after strong heating is determined, and the initial duty cycle is corrected according to the temperature change rate. Based on the corrected heating duty cycle, the heater is controlled to heat the heating element to output water at a stable temperature. Through preheating energy storage + strong heating segmented control, sufficient heat can be provided at the moment of pump start-up, effectively suppressing the temperature drop caused by cold water impact. By sensing the temperature change trend in real time and adjusting the power in advance, fluctuations are further suppressed. This solves the problem that the temperature control method in related technologies is prone to response lag and cannot effectively suppress cold water impact, and achieves the beneficial effects of fast response, effective suppression of cold water impact, and adaptive voltage fluctuation.

[0027] It should be noted that the temperature control method in this application embodiment also produces the following beneficial effects: First, it has an extremely fast response. Through preheating energy storage and strong heating segmented control, it can provide sufficient heat at the moment the pump starts, effectively suppressing the sudden drop in temperature caused by cold water impact. The outlet water temperature can reach the target value within 1 second.

[0028] Second, dynamic compensation introduces differential correction based on the rate of temperature change, which can sense the temperature change trend in real time and adjust the power in advance to further suppress fluctuations.

[0029] Third, it is simple to implement, requiring no complex thermodynamic models, only two sensors: the heating element temperature and the outlet water temperature, making it suitable for embedded system implementation.

[0030] Fourth, it is highly adaptable, especially suitable for scenarios with extremely short water dispensing times (such as a few seconds to tens of seconds), such as coffee machines and instant hot water dispensers.

[0031] In some embodiments, the temperature change rate of the heating element after intense heating is determined, and the initial duty cycle is corrected based on the temperature change rate, through the following steps: Step 21: Sample the temperature of the heating element according to the preset sampling period to obtain multiple current temperatures of the heating element during the steady-state maintenance phase; Step 22: Based on the difference between each current temperature and the target temperature, calculate the duty cycle correction value using a preset PID control algorithm.

[0032] In some alternative implementations, step 22, based on the difference between each current temperature and the target temperature, calculates the duty cycle correction value using a preset PID control algorithm, and is achieved through the following steps: Calculate the duty cycle correction change Δp(t) using the following formula: △p(t)=K p *Temp(t)+K d *(dTemp(t) / d(t)); Temp(t) = Temp r -Temp c ; Among them, K p K is the proportionality coefficient. d Here, dTemp(t) / d(t) represents the differential coefficient, dTemp(t) / d(t) represents the rate of temperature change, and Temp(t) represents the temperature difference. c Indicates the current temperature, Temp r Indicates the target temperature.

[0033] Step 23: The initial duty cycle corresponding to the superposition of the duty cycle correction change value is used to obtain the corresponding corrected heating duty cycle.

[0034] In this embodiment, the corrected heating duty cycle D new-steady =D new-steady +△p(t).

[0035] Through steps 21 to 23 above, dynamic and rapid feedback correction is achieved based on the real-time temperature of the heating element, real-time temperature change trend is sensed and power is adjusted in advance to further suppress fluctuations.

[0036] In some embodiments, extraction control parameters corresponding to the target temperature are obtained from a preset parameter library, which is achieved through the following steps: Step 31: Obtain the extraction control parameter table from the preset parameter library. The extraction control parameter table includes extraction temperature, preheating temperature, strong heating time, initial duty cycle, and the corresponding relationship between the four.

[0037] Step 32: In the extraction control parameter table, look up the preheating temperature, strong heating time and initial duty cycle corresponding to the extraction temperature as the target temperature to obtain the extraction control parameters corresponding to the target temperature.

[0038] In some embodiments, the following steps are performed before obtaining the extraction control parameters corresponding to the target temperature: Step 41: Obtain the preset preheating floating temperature, and use the sum of the preheating floating temperature and the preset extraction temperature as the preheating temperature corresponding to the extraction temperature, wherein the preheating floating temperature is 15℃ to 20℃.

[0039] In this embodiment, the target temperature Temp is... r Set the preheating temperature T pre =Temp r +Preheating floating temperature ΔT, where ΔT is 15℃-20℃.

[0040] Step 42: The preset strong heating time and steady-state duty cycle are used as the strong heating time and initial duty cycle corresponding to the corresponding extraction temperature, respectively.

[0041] In this embodiment, the strong heating time t is set. high Initial value 0.5 seconds, steady-state duty cycle D steady The initial value is estimated based on the law of conservation of energy; in this embodiment, a complete extraction is run once, and the effluent temperature curve is recorded; if the initial temperature is still too low, the heating time t is increased. hig Or increase the preheating temperature T pre If the temperature is too high in the middle and later stages, reduce the steady-state duty cycle D. steady If the temperature is low in the middle and later stages, increase the steady-state duty cycle D. steady Repeat the above steps until the temperature fluctuation is less than ±2℃, and record the parameter combination at this time.

[0042] In some embodiments, after controlling the heater to heat the heating element according to the corrected heating duty cycle obtained by the correction, the following steps are also performed; Step 51: Determine the average outlet water temperature during the steady-state phase and calculate the error between the average outlet water temperature and the target temperature.

[0043] Step 52: Determine the duty cycle variation value based on the preset learning rate and error, wherein the learning rate is 0.1 to 0.3;

[0044] Step 53: Determine all initial duty cycles corresponding to the target temperature, and superimpose the duty cycle change value with each initial duty cycle to update the initial duty cycle, and use the updated initial duty cycle as the initial duty cycle corresponding to the target temperature.

[0045] In this embodiment, the initial duty cycle is corrected through iterative learning, specifically including: after each extraction, collecting the average effluent temperature T of this extraction process. avg The calculation error e = Temp r -T avg Update the steady-state duty cycle (corresponding to the initial duty cycle) corresponding to the target temperature according to the following formula: D steady-new = D steady +λ*e, where λ is the learning rate (0.1 to 0.3), and the updated parameters are stored in non-volatile memory for the next extraction.

[0046] In this embodiment, through an iterative learning mechanism, the system can automatically adapt to the power tolerance of different devices and grid voltage fluctuations. After each extraction, the parameters are automatically optimized without manual intervention.

[0047] This embodiment also provides a temperature control device for an instantaneous heating device, which is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the terms "module," "unit," "subunit," etc., can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0048] Figure 3 This is a structural block diagram of the test program generation apparatus according to an embodiment of this application, such as... Figure 3 As shown, the device includes an acquisition module 31, a control module 32, and a processing module 33, wherein, The acquisition module 31 is used to acquire the target temperature from the received extraction command and acquire the extraction control parameters corresponding to the target temperature from the preset parameter library. The extraction control parameters include the preheating temperature, the strong heating time, and the initial duty cycle of the steady-state stage. The control module 32, coupled to the acquisition module 31, is used to control the heater of the target device to preheat the heating element to the preheating temperature according to the set preheating mode, and then control the heater to strongly heat the heating element pumped into the cold water according to the target duty cycle during the strong heating time. The processing module 33, coupled to the control module 32, is used to determine the temperature change rate of the heating element after strong heating, correct the initial duty cycle based on the temperature change rate, and control the heater to heat the heating element based on the corrected heating duty cycle to output water at a stable temperature.

[0049] The temperature control device of the aforementioned instantaneous heating equipment obtains the target temperature from the received extraction command and retrieves the extraction control parameters corresponding to the target temperature from the preset parameter library. The extraction control parameters include the preheating temperature, the strong heating time, and the initial duty cycle of the steady-state stage. After controlling the heater of the target equipment to preheat the heating element to the preheating temperature according to the set preheating mode, the heater is controlled to strongly heat the heating element pumped into the cold water according to the target duty cycle during the strong heating time. The temperature change rate of the heating element after strong heating is determined, and the initial duty cycle is corrected according to the temperature change rate. Based on the corrected heating duty cycle, the heater is controlled to heat the heating element to output water at a stable temperature. Through preheating energy storage + strong heating segmented control, sufficient heat can be provided at the moment of pump start-up, effectively suppressing the temperature drop caused by cold water impact. By sensing the temperature change trend in real time and adjusting the power in advance, fluctuations are further suppressed. This solves the problem that the temperature control method in related technologies is prone to response lag and cannot effectively suppress cold water impact, achieving the beneficial effects of fast response, effective suppression of cold water impact, and adaptive voltage fluctuation.

[0050] In some embodiments, the processing module 33 further includes: The sampling unit is used to sample the temperature of the heating element according to a preset sampling period to obtain multiple current temperatures of the heating element during the steady-state maintenance phase. The calculation unit, coupled to the sampling unit, is used to calculate the duty cycle correction value based on the difference between each current temperature and the target temperature using a preset PID control algorithm. The superposition unit, coupled to the calculation unit, is used to superimpose the duty cycle correction change value with the corresponding initial duty cycle to obtain the corresponding corrected heating duty cycle.

[0051] In some embodiments, the computing unit is also used to calculate the duty cycle correction change value Δp(t) according to the following formula: Δp(t) = K p *Temp(t)+K d *(dTemp(t) / d(t));Temp(t)=Temp r -Temp c Among them, K p K is the proportionality coefficient. d Here, dTemp(t) / d(t) represents the differential coefficient, dTemp(t) / d(t) represents the rate of temperature change, and Temp(t) represents the temperature difference. c Indicates the current temperature, Temp r Indicates the target temperature.

[0052] In some embodiments, the acquisition module 31 further includes: The acquisition unit is used to acquire the extraction control parameter table from the preset parameter library. The extraction control parameter table includes extraction temperature, preheating temperature, strong heating time, initial duty cycle and the corresponding relationship between the four. The query unit, coupled to the acquisition unit, is used to query the extraction control parameter table for the preheating temperature, strong heating time, and initial duty cycle corresponding to the target extraction temperature, and to obtain the extraction control parameters corresponding to the target temperature.

[0053] In some embodiments, before acquiring the extraction control parameters corresponding to the target temperature, the control device is further configured to acquire a preset preheating floating temperature and use the sum of the preheating floating temperature and the preset extraction temperature as the preheating temperature corresponding to the extraction temperature, wherein the preheating floating temperature is 15°C to 20°C; and to use the preset strong heating time and steady-state duty cycle as the strong heating time and initial duty cycle corresponding to the extraction temperature.

[0054] In some embodiments, after controlling the heater to heat the heating element according to the corrected heating duty cycle, the control device is further configured to determine the average outlet water temperature in the steady-state phase and calculate the error between the average outlet water temperature and the target temperature; determine the duty cycle change amplitude value according to a preset learning rate and error, wherein the learning rate is 0.1 to 0.3; determine all initial duty cycles corresponding to the target temperature, and superimpose the duty cycle change amplitude value with each initial duty cycle to update the initial duty cycle, and use the updated initial duty cycle as the initial duty cycle corresponding to the target temperature.

[0055] This embodiment also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.

[0056] Optionally, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor and the input / output device is connected to the processor.

[0057] Optionally, in this embodiment, the processor can be configured to perform the following steps via a computer program:

[0058] S1. Obtain the target temperature from the received extraction command and obtain the extraction control parameters corresponding to the target temperature from the preset parameter library. The extraction control parameters include the preheating temperature, the strong heating time, and the initial duty cycle of the steady-state stage.

[0059] S2, after the heater of the target device is preheated to the preheating temperature according to the set preheating mode, the heater is controlled to strongly heat the heating element of the pumped cold water according to the target duty cycle during the strong heating time.

[0060] S3, determine the temperature change rate of the heating element that has completed strong heating, correct the initial duty cycle according to the temperature change rate, and control the heater to heat the heating element according to the corrected heating duty cycle to output water at a stable temperature.

[0061] It should be noted that the specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementations, and will not be repeated here.

[0062] Furthermore, in conjunction with the temperature control method for the instantaneous heating device in the above embodiments, this application embodiment can provide a storage medium for implementation. This storage medium stores a computer program; when executed by a processor, the computer program implements any of the temperature control methods for the instantaneous heating device in the above embodiments.

[0063] Those skilled in the art should understand that the technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A temperature control method of an instant heating device, characterized by, include: The target temperature is obtained from the received extraction command, and the extraction control parameters corresponding to the target temperature are obtained from the preset parameter library. The extraction control parameters include the preheating temperature, the strong heating time, and the initial duty cycle of the steady-state stage. After the heater of the coffee machine is preheated to the preheating temperature according to the set preheating mode, the heater is controlled to strongly heat the heating element pumped with cold water according to the target duty cycle during the strong heating time. The temperature change rate of the heating element after strong heating is determined. Based on the temperature change rate, the initial duty cycle is corrected. Based on the corrected heating duty cycle, the heater is controlled to heat the heating element to output water at a stable temperature.

2. The temperature control method of claim 1, wherein, Determine the temperature change rate of the heating element after intense heating, and correct the initial duty cycle based on the temperature change rate, including: The temperature of the heating element is sampled according to the preset sampling period to obtain multiple current temperatures of the heating element during the steady-state maintenance phase. Based on the difference between each current temperature and the target temperature, the duty cycle correction value is calculated using a preset PID control algorithm. The corrected heating duty cycle is obtained by superimposing the duty cycle correction change value with the initial duty cycle.

3. The temperature control method of claim 2, wherein, Based on the difference between each current temperature and the target temperature, a preset PID control algorithm is used to calculate the duty cycle correction change value, including: The duty cycle correction change value Δp(t) is calculated using the following formula: △p(t) = K p *Temp(t) + K d *(dTemp(t) / d(t)); Temp(t) = Temp r -Temp c ; Among them, K p K is the proportionality coefficient. d Here, dTemp(t) / d(t) represents the differential coefficient, dTemp(t) / d(t) represents the rate of temperature change, and Temp(t) represents the temperature difference. c Indicates the current temperature, Temp r Indicates the target temperature.

4. The temperature control method of claim 1, wherein, Obtain the extraction control parameters corresponding to the target temperature from the preset parameter library, including: The extraction control parameter table is obtained from the preset parameter library, wherein the extraction control parameter table includes extraction temperature, preheating temperature, strong heating time, initial duty cycle and the corresponding relationship between the four; In the extraction control parameter table, the preheating temperature, strong heating time, and initial duty cycle corresponding to the extraction temperature as the target temperature are queried to obtain the extraction control parameters corresponding to the target temperature.

5. The temperature control method of claim 4, wherein, Before acquiring the extraction control parameters corresponding to the target temperature, the temperature control method further includes: A preset preheating floating temperature is obtained, and the sum of the preheating floating temperature and the preset extraction temperature is taken as the preheating temperature corresponding to the extraction temperature, wherein the preheating floating temperature is 15°C to 20°C. The preset intense heating time and steady-state duty cycle are sequentially used as the intense heating time and initial duty cycle corresponding to the corresponding extraction temperature.

6. The temperature control method of claim 5, wherein, After controlling the heater to heat the heating element according to the corrected heating duty cycle, the temperature control method further includes: Determine the average outlet water temperature during the steady-state phase, and calculate the error between the average outlet water temperature and the target temperature; Based on the preset learning rate and the error, the duty cycle variation range is determined, wherein the learning rate is between 0.1 and 0.

3. All initial duty cycles corresponding to the target temperature are determined, and the duty cycle change value is superimposed on each initial duty cycle to update the initial duty cycle, and the updated initial duty cycle is used as the initial duty cycle corresponding to the target temperature.

7. The temperature control method of claim 1, wherein, Controlling the coffee machine's heater to preheat the heating element to the preheating temperature according to the set preheating mode includes: Control the heater to heat the heating element to the preheating temperature at maximum power; and / or, The target duty cycle is 100% duty cycle.

8. A temperature control device for an instant heating apparatus, characterized by, include: The acquisition module is used to acquire the target temperature from the received extraction command and acquire the extraction control parameters corresponding to the target temperature from the preset parameter library. The extraction control parameters include the preheating temperature, the strong heating time, and the initial duty cycle of the steady-state stage. The control module is used to control the heater of the coffee machine to preheat the heating element to the preheating temperature according to the set preheating mode, and then control the heater to strongly heat the heating element pumped with cold water according to the target duty cycle during the strong heating time. The processing module is used to determine the temperature change rate of the heating element after strong heating, correct the initial duty cycle according to the temperature change rate, and control the heater to heat the heating element according to the corrected heating duty cycle to output water at a stable temperature. 9.An electronic device comprising a memory and a processor, the electronic device characterized by, The memory stores a computer program, and the processor is configured to run the computer program to perform the steps of the instant coffee machine temperature control method according to any one of claims 1 to 7.

10. A storage medium having stored thereon a computer program, characterized in that When the computer program is executed by the processor, it implements the instant coffee machine temperature control method according to any one of claims 1 to 7.

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