Heating device, heating equipment, control method and storage medium

Abstract

The invention discloses a heating device, heating equipment, a control method and a storage medium, and belongs to the technical field of heating devices. The heating device comprises a heating body (100), a detection unit (200) and a control unit (300), the heating body (100) is arranged on the infusion pipeline (400), the detection unit (200) is arranged on the infusion pipeline (400), and the control unit (300) is electrically connected with the heating body (100) and the detection unit (200). The heating body (100) is used for heating a medium in an infusion pipeline; the detection unit (200) is used for detecting the flow of a medium and generating a detection signal according to a detection result; the control unit (300) is used for receiving the detection signal and controlling the heating body (100) to reduce the heating power when the flow corresponding to the detection signal is smaller than a reference flow, and the reference flow is the flow of the medium at the current flow rate and in the non-boiling state.

Description

Heating device, heating equipment, control method and storage medium Technical Field

[0001] The present application relates to the technical field of heating devices, and in particular to a heating device, a heating apparatus, a control method and a storage medium. Background Art

[0002] Some heating devices, such as slow cookers, need to prevent the medium from boiling while heating. Boiling medium poses a safety hazard, potentially causing burns or equipment damage. Currently, these heating devices lack boiling control solutions, making it easy for the medium to boil, leading to adverse effects.

[0003] Summary of the Invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a heating device, heating equipment, control method and storage medium, which control the boiling of the medium during the medium heating process, avoid water boiling, and improve safety.

[0005] In the first aspect, the present application provides a heating device, which includes: a heating element, which is arranged on an infusion pipeline and is used to heat the medium in the infusion pipeline; a detection unit, which is arranged on the infusion pipeline and is used to detect the flow rate of the medium and generate a detection signal based on the detection result; a control unit, which is electrically connected to the heating element and the detection unit, respectively, and is used to receive the detection signal and control the heating element to reduce the heating power when the flow rate corresponding to the detection signal is less than a reference flow rate, wherein the reference flow rate is the flow rate of the medium in a non-boiling state when the infusion pipeline is in the current driving state.

[0006] According to the heating device of the present application, the actual flow rate of the medium in the water supply pipeline is detected and compared with the flow rate in the non-boiling state, so as to effectively determine whether boiling occurs and reduce the heating power in the boiling state, thereby avoiding continuous boiling of water and improving the safety of the heating device.

[0007] In a second aspect, the present application provides a heating device, which includes: a water tank; a heating device according to the aforementioned embodiment, the heating device is connected to the water tank and forms an infusion pipeline, the water in the water tank circulates through the infusion pipeline, and the heating device is used to heat the water flow in the infusion pipeline.

[0008] According to the heating device of the present application, the actual flow rate of the medium in the water supply pipeline is detected and compared with the flow rate in the non-boiling state, so as to effectively determine whether boiling occurs, and reduce the heating power in the boiling state, thereby avoiding continuous boiling of water and improving the safety of the heating device.

[0009] In the third aspect, the present application provides a heating device, which includes: a heating element, which is arranged on the infusion pipeline and is used to heat the medium in the infusion pipeline; a fluid pump, which is used to drive the flow of the medium in the infusion pipeline; a current detection circuit, which is electrically connected to the fluid pump and is used to detect the load current of the fluid pump and generate the detection signal according to the current value of the load current; a controller, which is electrically connected to the heating element and the current detection circuit, respectively, and is used to receive the detection signal and control the heating element to reduce the heating power when the current value corresponding to the detection signal is less than a reference current value, wherein the reference current value is the current value of the load current when the fluid pump is at the current speed and the medium is in a non-boiling state.

[0010] In a fourth aspect, the present application provides a heating device, which includes: a heating element, arranged on an infusion pipeline, for heating the medium in the infusion pipeline; a flow meter, arranged on the infusion pipeline, for measuring the flow of the medium and generating the detection signal based on the flow; a controller, electrically connected to the heating element and the flow meter, respectively, for receiving the detection signal and controlling the heating element to reduce the heating power when the flow corresponding to the detection signal is less than a reference flow, wherein the reference flow is the flow of the medium in a non-boiling state when the infusion pipeline is in the current driving state.

[0011] According to the heating device of the present application, a flow meter is used to detect the actual flow of the medium in the water supply pipeline, and compare it with the flow in the non-boiling state, so as to effectively determine whether boiling occurs, and reduce the heating power in the boiling state, thereby avoiding continuous boiling of water and improving the safety of the heating device.

[0012] According to one embodiment of the present application, the heating device also includes a first temperature sensor; the first temperature sensor is arranged on the infusion pipeline, and is used to detect the first temperature of the medium before it flows through the heating element; the controller is also used to generate a first control quantity based on the detection signal and the reference flow, determine a second control quantity based on the first temperature and the target temperature, and adjust the heating power of the heating element based on the first control quantity and the second control quantity.

[0013] In the fifth aspect, the present application provides a control method for a heating device, wherein the heating device is arranged on an infusion pipeline, and the control method includes: obtaining the flow rate of the medium in the infusion pipeline; when the flow rate is less than a reference flow rate, reducing the heating power of the heating device, and the reference flow rate is the flow rate of the medium at the current flow rate and in a non-boiling state.

[0014] According to the heating device control method of the present application, the actual flow rate of the medium in the water supply pipeline is detected and compared with the flow rate in the non-boiling state, so as to effectively determine whether boiling occurs, and reduce the heating power in the boiling state, thereby avoiding continuous boiling of water and improving the safety of the heating device.

[0015] In a sixth aspect, the present application provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the control method of the heating device as described in the aforementioned embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] FIG1 is a schematic diagram of a structure of a heating device according to an embodiment of the present application;

[0018] FIG2 is a second structural schematic diagram of a heating device provided in an embodiment of the present application;

[0019] FIG3 is a third structural diagram of the heating device provided in an embodiment of the present application;

[0020] FIG4 is a fourth structural diagram of the heating device provided in an embodiment of the present application;

[0021] FIG5 is a control logic diagram of a heating device provided in an embodiment of the present application;

[0022] FIG6 is a schematic diagram of a structure of a heating device according to an embodiment of the present application;

[0023] FIG7 is a fifth structural diagram of a heating device provided in an embodiment of the present application;

[0024] FIG8 is a sixth structural diagram of a heating device provided in an embodiment of the present application;

[0025] FIG9 is a schematic flow chart of a method for controlling a heating device according to an embodiment of the present application;

[0026] FIG10 is a second structural diagram of a heating device provided in an embodiment of the present application;

[0027] FIG11 is a third structural diagram of a heating device provided in an embodiment of the present application;

[0028] FIG12 is a fourth structural diagram of a heating device provided in an embodiment of the present application;

[0029] FIG13 is a fifth structural diagram of a heating device provided in an embodiment of the present application;

[0030] FIG14 is a sixth structural diagram of the heating device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0032] 1 , the heating device according to an embodiment of the present application includes a heating element 100, a detection unit 200 and a control unit 300. The heating device is connected to the infusion line 400 to heat the medium in the infusion line 400. The heating element 100 and the detection unit 200 are both arranged on the infusion line, and the control unit 300 is electrically connected to the heating element 100 and the detection unit 200, respectively. The heating element 100 is used to heat the medium in the infusion line 400; the detection unit 200 is used to detect the flow of the medium and generate a detection signal based on the detection result; the control unit 300 is used to receive the detection signal and control the heating element 100 to reduce the heating power when the flow corresponding to the detection signal is less than a reference flow. The reference flow is the flow of the medium in a non-boiling state when the infusion line is in the current driving state.

[0033] It should be noted that the heating device in this embodiment is primarily used to heat a flowing medium. During the heating process, bubbles are generated when the medium boils, which can cause a decrease in flow rate. Therefore, the medium's flow rate can be used to determine whether the medium is boiling and to perform corresponding control. The arrows in Figure 1 indicate the direction of the medium. Of course, in some embodiments, the direction of the medium can be opposite to that shown in Figure 1. The medium can be water or various types of oil, etc. This embodiment uses water as the medium for illustration.

[0034] Since the liquid flows and circulates in the infusion line 400, in some embodiments, boiling of the liquid may cause poor flow and steam ejection, causing the cooking device to be unable to work. Therefore, it is necessary to prevent the liquid in the infusion line 400 from boiling.

[0035] In some embodiments, the infusion pipeline 400 can be a water circulation loop on a water supply device, such as the water inlet and water outlet of the infusion pipeline 400 are both connected to the water storage chamber in the water tank, and the water in the water storage chamber enters the infusion pipeline 400 from the water inlet and then flows back to the water storage chamber from the water outlet.

[0036] In some embodiments, the infusion pipeline 400 can also be a water channel between two or more devices, such as the infusion pipeline 400 is arranged between a water tank and a water outlet mechanism (faucet, etc.), the water inlet of the infusion pipeline 400 is connected to the water tank, and the water outlet of the infusion pipeline 400 is connected to the water outlet mechanism.

[0037] In some embodiments, the heating element 100 may be a thick film heater, typically formed by screen printing a heating film layer on a substrate. The substrate may be cylindrical, forming a heating channel. Heat generated by the heating film layer is radiated through the substrate into the heating channel. The heating channel is connected to the infusion line 400. The medium can flow into the heating channel through a section of the infusion line 400, be heated, and then flow out of the heating channel.

[0038] In some embodiments, the heating element 100 may also be a PTC ceramic heating element or a heating rod, etc. Such a heating element 100 usually needs to be inserted into the infusion line.

[0039] In this embodiment, the detection unit 200 can detect the flow rate of the medium in the infusion line 400 directly or indirectly, and transmit the generated detection signal to the control unit 300. The detection signal can be an electrical signal, which can use a voltage value or a current value to represent the flow rate; or the detection signal can also be a data stream, the content of which can represent the flow rate.

[0040] It should be noted that the driving state of the infusion line 400 refers to the state of the infusion line 400 when driven by the power device, which can be understood as the output state of the power device that provides power to the medium in the infusion line 400. For example, if the infusion line 400 is driven by a water pump and the speed of the water pump is 3000 r / min, the driving state of the infusion line 400 can be the speed of the water pump being 3000 r / min.

[0041] As an example, the infusion line 400 is driven by a water pump, and the set speed of the water pump is 4000 r / min. The control unit 300 receives the detection signal and determines that the flow rate corresponding to the detection signal is 9m 3 / s, and the current speed of the water pump is 4000r / min. The control unit 300 determines the reference flow rate as 10m 3 / s, since the flow rate corresponding to the detection signal is less than the reference flow rate, the control unit 300 determines that the water flow in the infusion pipeline 400 has boiled.

[0042] 2 , in some embodiments, the control unit 300 may include an MCU 310 (Microcontroller Unit). The MCU 310 may be internally configured with a corresponding program to execute the identification and judgment process of the detection signal. The MCU 310 may store a comparison content of the same type as the detection signal content corresponding to a reference flow rate, a direct mapping relationship between the reference flow rate and the comparison content, and a mapping relationship between the detection signal and the content of the detection signal. The MCU 310 may thus directly compare the content of the detection signal with the comparison content to determine the size relationship between the flow rate corresponding to the detection signal and the reference flow rate.

[0043] As an example, the voltage value of the detection signal is used to characterize the flow rate. MCU310 can store a reference voltage value corresponding to a reference flow rate. After receiving the detection signal, MCU310 compares the voltage value of the detection signal with the reference voltage value. If the voltage value of the detection signal is less than the reference voltage value, it is determined that the flow rate corresponding to the detection signal is less than the reference flow rate, and the water boils; if the voltage value of the detection signal is equal to the reference voltage value, it is determined that the flow rate corresponding to the detection signal is equal to the reference flow rate, and the water does not boil.

[0044] It can be understood that the heating power of the heating element 100 can be determined by the voltage value or current value of the power supply according to its working characteristics. Therefore, the heating power of the heating element 100 can be increased by increasing the voltage value or current value of the power supply, or the heating power of the heating element 100 can be reduced by reducing the voltage value or current value of the power supply.

[0045] In some embodiments, the MCU 310 stores a control program and generates a control signal by calling the control program. The control signal can be used to control the power supply of the heating element 100 to control the heating element 100. The MCU 310 can generate a corresponding control signal by configuring the corresponding heating parameters in the control program to adjust the heating power of the heating element 100. After determining that the flow rate corresponding to the detection signal is less than the reference flow rate, the MCU 310 can reduce the heating parameters according to the reference ratio or amplitude.

[0046] In some embodiments, since the power supply of the control signal generated by the MCU310 is relatively low, in order to improve the driving effect on the heating element 100, the control unit 300 may further include a driving circuit 320, and the driving circuit 320 is electrically connected to the MCU310 and the heating element 100, respectively. The driving circuit 320 receives the control signal, generates a corresponding driving signal according to the control signal, and transmits the driving signal to the heating element 100 to drive the heating element 100. The driving circuit 320 is used to drive the heating element 100 to operate, and its specific type can be selected according to the specific type of the heating element 100. For example, the heating element 100 can adopt a thick film heater, and the driving circuit 320 can adopt a thyristor 321. The specific structure and principle of different heating elements 100 and the driving circuit 320 have mature technologies, and this embodiment will not be repeated here.

[0047] According to the heating device of the present application, the actual flow rate of the medium in the water supply pipeline is detected and compared with the flow rate in the non-boiling state, so as to effectively determine whether boiling occurs and reduce the heating power in the boiling state, thereby avoiding continuous boiling of water and improving the safety of the heating device.

[0048] Referring to Figure 2, in some embodiments of the present application, a fluid pump 500 is provided on the infusion line 400, and the detection unit 200 includes a current detection unit 210; the fluid pump 500 is used to drive the flow of the medium in the infusion line 400; the current detection unit 200 is electrically connected to the fluid pump 500 and is used to obtain the load current of the fluid pump 500 to detect the flow rate of the medium and generate a detection signal based on the current value of the load current. The fluid pump 500 includes non-self-priming water pumps and self-priming water pumps. Non-self-priming water pumps include pumps without air suction function, such as centrifugal pumps, and self-priming water pumps include pumps with air suction function, such as vacuum centrifugal pumps. In some embodiments, the fluid pump 500 is a centrifugal pump.

[0049] It is understood that the load current of the fluid pump 500 refers to the actual operating current of the fluid pump 500 when driving a load. The load of the fluid pump 500 is the medium, so when the medium boils and the flow rate decreases, the load of the fluid pump 500 decreases, and the corresponding load current also decreases.

[0050] According to the heating device of the present application, whether the medium in the infusion pipeline 400 is boiling is indirectly determined by detecting the load current of the fluid pump 500, so that the boiling control of the medium is more accurate.

[0051] In some embodiments of the present application, the control unit 300 is also used to determine that the flow rate corresponding to the detection signal is less than the reference flow rate when the current value corresponding to the detection signal is less than the reference current value, and the reference current value is the current value of the load current when the fluid pump 500 is at the current speed and the medium is in a non-boiling state.

[0052] As an example, MCU310 can store a reference current value. After receiving the detection signal, MCU310 compares the current value of the detection signal with the reference current value. If the current value of the detection signal is less than the reference current value, it is determined that the flow rate corresponding to the detection signal is less than the reference flow rate, and the medium boils; if the current value of the detection signal is equal to the reference current value, it is determined that the flow rate corresponding to the detection signal is equal to the reference flow rate, and the medium does not boil.

[0053] It should be noted that the fluid pump 500 can be a pump with adjustable flow. Depending on different operating environments, the fluid pump 500 may operate at different speeds. Therefore, the MCU 310 needs to store reference current values ​​corresponding to different speeds, and upon receiving a detection signal, obtain the current speed of the fluid pump 500, and then compare the current value of the detection signal with the reference current value corresponding to the current speed.

[0054] In some embodiments, the fluid pump 500 can be directly controlled by the MCU 310. The MCU 310 can also store a fluid pump control program, and the MCU 310 controls the operation of the fluid pump 500 by calling the fluid pump control program. In such embodiments, the MCU 310 can directly determine the current speed of the fluid pump 500 based on the speed parameter in the fluid pump control program.

[0055] In some embodiments, the fluid pump 500 may also be controlled by a separate controller. In such embodiments, the MCU 310 needs to communicate with the controller of the fluid pump 500 to obtain the current rotation speed of the fluid pump 500.

[0056] According to the heating device of the embodiment of the present application, the control unit 300 compares the actual load current value of the fluid pump 500 with the corresponding reference current value, thereby more accurately determining whether the medium in the infusion pipeline 400 is boiling.

[0057] In some embodiments of the present application, the current detection unit 210 may include a collection and amplification unit 211 and an analog-to-digital conversion unit 212. The collection and amplification unit 211 is electrically connected to the fluid pump 500 and is used to collect the load current of the fluid pump 500 and amplify the load current to obtain an amplified current; the analog-to-digital conversion unit 212 is electrically connected to the collection and amplification unit 211 and is used to digitally sample the amplified current and generate a detection signal based on the sampled value.

[0058] It is understandable that, in order to facilitate MCU310 to identify and judge the detection signal, the load current of the fluid pump 500 can be pre-processed first to obtain a signal suitable for processing by MCU310. The load current of the fluid pump 500 is not suitable for direct processing, so it is necessary to collect the load current. For example, a current sensor can be used or the electrical circuit of the fluid pump 500 can be collected using a resistor. In order to facilitate the processing of the sampled current and improve the accuracy, the collected current can be amplified. Specifically, a current amplifier can be used. In order to improve the recognition accuracy of MCU310, the amplified current can also be digitally sampled to generate a digital signal. The specific circuit structure and principle of the collection, amplification and analog-to-digital conversion of the current signal are already mature technologies, and this embodiment will not be repeated here.

[0059] 4 , in some embodiments of the present application, the detection unit 200 may further include a flow meter 220. The flow meter 220 is disposed on the infusion line 400 and is electrically connected to the control unit 300. The flow meter 220 is used to measure the flow rate of the medium and generate a detection signal based on the flow rate.

[0060] In this embodiment, the control unit 300 receives a detection signal transmitted by the flow meter 220. The control unit 300 compares the flow rate corresponding to the detection signal with a reference flow rate. If the flow rate is less than the reference flow rate, the control unit 300 determines that the water is boiling; if the flow rate is equal to the reference flow rate, the control unit 300 determines that the medium is not boiling. The reference flow rate can be specifically described above. The principles and usage of the flow meter 220 are well-established technologies and will not be further elaborated in this embodiment.

[0061] In some embodiments of the present application, the detection unit 200 may also include a first temperature detection unit 230; the first temperature detection unit 230 is arranged on the infusion pipeline 400, and is used to detect the first temperature of the medium before it flows through the heating element 100; the control unit 300 is also used to generate a first control quantity based on the detection signal and the reference flow, determine the second control quantity based on the first temperature and the target temperature, and adjust the heating power of the heating element 100 based on the first control quantity and the second control quantity.

[0062] The control unit 300 includes an MCU 310, which is electrically connected to the first temperature detection unit 230 and receives signals from the first temperature detection unit 230 to obtain the first temperature. The MCU 310 can also be electrically connected to the heating element 100 and send control signals to the heating element 100 to control the heating power of the heating element 100. The first temperature detection unit 230 can be composed of a sensor device, such as an NTC (Negative Temperature Coefficient) thermal resistor.

[0063] The target temperature refers to the temperature that the medium is intended to reach when heated by the heating device. The target temperature can be input by the user. For example, if the user inputs 92°C, the target temperature will be 92°C. Alternatively, the target temperature can be automatically set by a heating program stored in MCU 310. For example, the heating program can determine the corresponding target temperature based on the local time, such as 90°C at night and 80°C during the day. The target temperature can be set according to the application scenario of the heating device, and this embodiment is not limited to this.

[0064] In some embodiments, generating the first control variable based on the detection signal and the reference flow rate refers to generating the first control variable based on the difference between the flow rate corresponding to the detection signal and the reference flow rate. When the water is not boiling, the difference between the flow rate corresponding to the detection signal and the reference flow rate is zero, and the corresponding first control variable is zero. When the water is boiling, the flow rate corresponding to the detection signal is less than the reference flow rate, and the corresponding first control variable is determined based on the difference between the two, and the specific value can be set as needed.

[0065] In some embodiments, determining the second control variable based on the first temperature and the target temperature means generating the second control variable based on the difference between the first temperature and the target temperature. When the first temperature is less than the target temperature, the second control variable may be determined based on the difference between the first temperature and the target temperature, and the specific value may be set as needed. When the first temperature is equal to the target temperature, the second control variable may be zero.

[0066] In this embodiment, the control quantity is used to represent the adjustment quantity of the heating power of the heating element 100, which can be in the form of an electrical signal. The first control quantity represents the adjustment quantity of the heating power of the heating element 100 determined by judging whether boiling occurs based on the flow rate, and the second control quantity represents the adjustment quantity of the heating power of the heating element 100 determined based on the target temperature that the medium needs to reach. The MCU310 superimposes the first control quantity and the second control quantity, and controls the heating power of the heating element 100 based on the superimposed control quantity. The superposition method includes direct addition, averaging, weighted averaging, and other methods.

[0067] According to the heating device of the present application, the first control amount and the second control amount are superimposed, and the heating power of the heating element 100 is controlled according to the superimposed control amount, so that the medium is heated to the target temperature while avoiding boiling of the medium.

[0068] In some embodiments of the present application, the detection unit 200 may also include a second temperature detection unit 240; the second temperature detection unit 240 is arranged on the infusion line 400, and is used to detect the second temperature of the medium after flowing through the heating element 100; the control unit 300 is also used to generate a first control quantity based on the detection signal and the reference flow, determine the third control quantity based on the second temperature and the boiling point of the medium, and adjust the heating power of the heating element 100 based on the first control quantity and the third control quantity.

[0069] The control unit 300 includes an MCU 310. The MCU 310 is electrically connected to the second temperature detection unit 240 and receives signals from the second temperature detection unit 240 to obtain the second temperature. The MCU 310 can also be electrically connected to the heating element 100 and send control signals to the heating element 100 to control the heating power of the heating element 100. The second temperature detection unit 240 can also be composed of a sensor device, such as an NTC thermistor.

[0070] In some embodiments, determining the third control variable based on the second temperature and the boiling point means generating the third control variable based on the difference between the second temperature and the boiling point. When the second temperature is less than the boiling point, the third control variable is determined based on the difference between the two, and the specific value can be set as needed. When the second temperature is equal to the boiling point, the third control variable can be zero. The method for determining the first control variable can refer to the above embodiment.

[0071] The second temperature represents the output temperature of the medium flowing out of the heating element 100. If the second temperature is greater than or equal to the boiling point, the medium has boiled. To further prevent the medium from boiling, a maximum allowable output temperature can be set based on the boiling point. When the second temperature reaches the maximum allowable output temperature, the heating power of the heating element 100 is reduced. A margin can be set between the maximum allowable output temperature and the boiling point, i.e., maximum allowable output temperature = boiling point - margin. This margin can be 1-2°C.

[0072] According to the heating device of the present application, by superimposing the first control quantity and the third control quantity, and then controlling the heating power of the heating element 100 according to the superimposed control quantity, the output temperature of the medium flowing out is controlled below the maximum allowable output temperature, thereby effectively avoiding boiling of the medium.

[0073] In some embodiments of the present application, the detection unit 200 may also include a first temperature detection unit 230 and a second temperature detection unit 240; the first temperature detection unit 230 is arranged on the infusion line 400, and is used to detect the first temperature of the medium before it flows through the heating element 100; the second temperature detection unit 240 is arranged on the infusion line 400, and is used to detect the second temperature of the medium after it flows through the heating element 100; the control unit 300 is also used to generate a first control quantity based on the detection signal and the reference flow, determine the second control quantity based on the first temperature and the target temperature, determine the third control quantity based on the second temperature and the boiling point of the medium, and adjust the heating power of the heating element 100 based on the first control quantity, the second control quantity and the third control quantity.

[0074] The control unit 300 includes an MCU 310. The MCU 310 is electrically connected to the first temperature detection unit 230 and the second temperature detection unit 240, and receives signals from the first temperature detection unit 230 and the second temperature detection unit 240 to obtain the first temperature and the second temperature. The first control amount, the second control amount, and the third control amount can be determined by referring to the above embodiments.

[0075] 5 , in this embodiment, the control strategy for the heating element 100 is to superimpose the first control variable, the second control variable, and the third control variable, and use the superimposed control variables to control the heating power of the heating element 100. The reference current in FIG5 is the current of the fluid pump 500 at the current speed and when the medium is in a non-boiling state; the load current is the actual current of the fluid pump 500, obtained by the current detection unit 210; the first temperature is the temperature of the medium before it flows through the heating element 100, obtained by the first temperature detection unit 230; the second temperature is the temperature of the medium after it flows through the heating element 100, obtained by the second temperature detection unit 240; the target temperature and the maximum allowable output temperature are as described above.

[0076] According to the heating device of the embodiment of the present application, an output temperature feedback and control loop and a fluid pump current feedback and control loop are added to the target water temperature control loop, so as to limit the output temperature to or below the maximum allowable output temperature, avoid boiling of the medium, and improve the safety of the heating device.

[0077] In some embodiments of the present application, the detection unit 200 may further include an air pressure sensor 250. The air pressure sensor 250 is electrically connected to the control unit 300 and is configured to detect the air pressure of the environment in which the heating device is located and generate an air pressure signal based on the air pressure. The control unit 300 is further configured to determine the boiling point of the medium based on the air pressure signal.

[0078] The control unit 300 includes an MCU 310, which is electrically connected to the air pressure sensor 250. The MCU 310 has an internal memory for storing the correspondence between air pressure and boiling point. The MCU 310 determines the corresponding boiling point based on the air pressure corresponding to the air pressure signal and the correspondence between the air pressure and boiling point.

[0079] In some embodiments of the present application, the detection unit 200 may further include an altimeter 260. The altimeter 260 is electrically connected to the control unit 300 and is configured to detect the altitude of the environment in which the heating device is located and generate an altitude signal based on the altitude. The control unit 300 is further configured to determine the boiling point of the medium based on the altitude signal.

[0080] The control unit 300 includes an MCU 310, which is electrically connected to the altimeter 260. The MCU 310 stores the correspondence between altitude and boiling point. The MCU 310 determines the boiling point based on the altitude corresponding to the altitude signal and the correspondence between the altitude and boiling point.

[0081] According to the heating device of the embodiment of the present application, the boiling point of the medium in the environment of the heating device can be accurately determined, thereby heating the medium more accurately without causing the medium to boil, thereby improving the safety of the heating device.

[0082] 6 , an embodiment of the present application further provides a heating device. The heating device includes a water tank 600 and the aforementioned heating device, the heating device being connected to the water tank 600 and forming an infusion line 400. Water in the water tank 600 circulates through the infusion line, and the heating device 400 is used to heat the water flow in the infusion line.

[0083] According to the heating device of the present application, the actual flow rate of the medium in the water supply pipeline is detected and compared with the flow rate in the non-boiling state, so as to effectively determine whether boiling occurs, and reduce the heating power in the boiling state, thereby avoiding continuous boiling of water and improving the safety of the heating device.

[0084] In this embodiment, the heating device is controlled in combination with the reference water temperature control loop, the output temperature feedback and control loop, and the fluid pump current feedback and control loop. When heating the water in the water tank 600, the water temperature is limited to or below the maximum allowable output temperature to avoid boiling of the water flow, thereby improving the safety of the heating device.

[0085] 7 , an embodiment of the present application further provides a heating device. The heating device includes a heating element 100, a fluid pump 500, a current detection circuit 700, and a controller 800. The heating element 100 is arranged on the infusion line 400, and is used to heat the medium in the infusion line 400; the fluid pump 500 is used to drive the flow of the medium in the infusion line 400; the current detection circuit 700 is electrically connected to the fluid pump 500, and is used to detect the load current of the fluid pump 500, and generate a detection signal according to the current value of the load current; the controller 800 is electrically connected to the heating element 100 and the current detection circuit 700, respectively, and is used to receive the detection signal, and when the current value corresponding to the detection signal is less than the reference current value, the heating element 100 is controlled to reduce the heating power, and the reference current value is the current value of the load current when the fluid pump 500 is at the current speed and the medium is in a non-boiling state.

[0086] It is understood that the load current of the fluid pump 500 refers to the actual operating current of the fluid pump 500 when driving a load. The load of the fluid pump 500 is the medium, so when the medium boils and the flow rate decreases, the load of the fluid pump 500 decreases, and the corresponding load current also decreases.

[0087] As an example, the controller 800 can store a reference current value. After receiving the detection signal, the controller 800 compares the current value of the detection signal with the reference current value. If the current value of the detection signal is less than the reference current value, it is determined that the flow rate corresponding to the detection signal is less than the reference flow rate and the medium boils; if the current value of the detection signal is equal to the reference current value, it is determined that the flow rate corresponding to the detection signal is equal to the reference flow rate and the medium does not boil.

[0088] It should be noted that the fluid pump 500 can be a pump with adjustable flow. Depending on the operating environment, the fluid pump 500 may operate at different speeds. Therefore, the controller 800 needs to store reference current values ​​corresponding to different speeds. Upon receiving a detection signal, the controller 800 obtains the current speed of the fluid pump 500 and then compares the current value of the detection signal with the reference current value corresponding to the current speed.

[0089] In some embodiments of the present application, the current detection circuit 700 may include a collection and amplification circuit 710 and an analog-to-digital converter 720. The collection and amplification circuit 710 is electrically connected to the fluid pump 500 and is used to collect the load current of the fluid pump 500 and amplify the load current to obtain an amplified current; the analog-to-digital converter 720 is electrically connected to the collection and amplification circuit 710 and is used to digitally sample the amplified current and generate a detection signal based on the sampled value.

[0090] It is understood that, to facilitate the controller 800's identification and judgment of the detection signal, the load current of the fluid pump 500 can first be preprocessed to obtain a signal suitable for processing by the controller 800. The load current of the fluid pump 500 is not suitable for direct processing, so it is necessary to collect the load current. For example, a current sensor can be used or a resistor can be used to collect the load current in the electrical circuit of the fluid pump 500. To facilitate processing of the sampled current and improve accuracy, the collected current can be amplified. Specifically, a sampling current amplifier can be used. To improve the recognition accuracy of the controller 800, the amplified current can also be digitally sampled to generate a digital signal. The specific circuit structure and principles of current signal collection, amplification, and analog-to-digital converter are already mature technologies and will not be detailed in this embodiment.

[0091] In some embodiments of the present application, the heating device may further include a first temperature sensor 230. The first temperature sensor 230 is provided on the infusion line 400 and is used to detect a first temperature of the medium before it flows through the heating element 100. The controller 800 is further used to generate a first control variable based on the detection signal and a reference current value, determine a second control variable based on the first temperature and a target temperature, and adjust the heating power of the heating element 100 based on the first control variable and the second control variable.

[0092] According to the heating device of the present application, the first control amount and the second control amount are superimposed, and the heating power of the heating element 100 is controlled according to the superimposed control amount, so that the medium is heated to the target temperature while avoiding boiling of the medium.

[0093] In some embodiments of the present application, the heating device may further include a second temperature sensor 240; the second temperature sensor 240 is arranged on the infusion line 400, and is used to detect the second temperature of the medium after flowing through the heating element 100; the controller 800 is also used to generate a first control quantity based on the detection signal and the reference current value, determine a third control quantity based on the second temperature and the boiling point of the medium, and adjust the heating power of the heating element 100 based on the first control quantity and the third control quantity.

[0094] According to the heating device of the present application, by superimposing the first control quantity and the third control quantity, and then controlling the heating power of the heating element 100 according to the superimposed control quantity, the output temperature of the medium flowing out is controlled below the maximum allowable output temperature, thereby effectively avoiding boiling of the medium.

[0095] In some embodiments of the present application, the heating device also includes a first temperature sensor 230 and a second temperature sensor 240; the first temperature sensor 230 is arranged on the infusion line 400, and is used to detect the first temperature of the medium before it flows through the heating element 100; the second temperature sensor 240 is arranged on the infusion line 400, and is used to detect the second temperature of the medium after it flows through the heating element 100; the controller 800 is also used to generate a first control quantity based on the detection signal and the reference current value, determine the second control quantity based on the first temperature and the target temperature, determine the third control quantity based on the second temperature and the boiling point of the medium, and adjust the heating power of the heating element 100 based on the first control quantity, the second control quantity and the third control quantity.

[0096] The controller 800 is electrically connected to the first temperature detection unit 230 and the second temperature detection unit 240, and receives signals from the first temperature detection unit 230 and the second temperature detection unit 240 to obtain the first temperature and the second temperature. The first control amount, the second control amount, and the third control amount can be determined by referring to the above embodiment.

[0097] According to the heating device of the embodiment of the present application, an output temperature feedback and control loop and a fluid pump current feedback and control loop are added to the target water temperature control loop, so as to limit the output temperature to or below the maximum allowable output temperature, avoid boiling of the medium, and improve the safety of the heating device.

[0098] It should be noted that the description of the relevant structures of the water tank connection mechanism in this embodiment can refer to the description of the aforementioned embodiments, and this embodiment can also include structures mentioned in the aforementioned embodiments but not mentioned in this embodiment.

[0099] 8 , an embodiment of the present application further provides a heating device. The heating device includes a heating element 100, a flow meter 220, and a controller 800: the heating element 100 is provided on the infusion line 400 and is used to heat the medium in the infusion line 400; the flow meter 220 is provided on the infusion line 400 and is used to measure the flow of the medium and generate a detection signal based on the flow; the controller 800 is electrically connected to the heating element 100 and the flow meter 220, respectively, and is used to receive the detection signal and control the heating element 100 to reduce the heating power when the flow corresponding to the detection signal is less than a reference flow. The reference flow is the flow of the medium in a non-boiling state when the infusion line 400 is in the current driving state.

[0100] It should be noted that the heating device in this embodiment is primarily used to heat a flowing medium. During the heating process, bubbles are generated when the medium boils, which can cause a decrease in flow rate. Therefore, the medium's flow rate can be used to determine whether the medium is boiling and to perform corresponding control. The arrows in Figure 8 indicate the direction of the medium. Of course, in some embodiments, the direction of the medium can be opposite to that shown in Figure 8. The medium can be water or various types of oil, etc. This embodiment uses water as the medium for illustration.

[0101] It should be noted that the driving state of the infusion line 400 refers to the state of the infusion line 400 when driven by the power device, which can be understood as the output state of the power device that provides power to the medium in the infusion line 400. For example, if the infusion line 400 is driven by a water pump and the speed of the water pump is 3000 r / min, the driving state of the infusion line 400 can be the speed of the water pump being 3000 r / min.

[0102] As an example, the infusion line 400 is driven by a water pump, and the set speed of the water pump is 4000 r / min. The control unit 300 receives the detection signal and determines that the flow rate corresponding to the detection signal is 9m 3 / s, and the current speed of the water pump is 4000r / min. The control unit 300 determines the reference flow rate as 10m 3 / s, since the flow rate corresponding to the detection signal is less than the reference flow rate, the control unit 300 determines that the water flow in the infusion pipeline 400 has boiled.

[0103] Controller 800 receives the detection signal transmitted by flowmeter 220. Controller 800 compares the flow rate corresponding to the detection signal with a reference flow rate. If the flow rate is less than the reference flow rate, the water is deemed to be boiling; if the flow rate is equal to the reference flow rate, the medium is deemed not to be boiling. The principles and usage of flowmeter 220 are well-established technologies and will not be further elaborated in this embodiment.

[0104] According to the heating device of the present application, the actual flow rate of the medium in the water supply pipeline 400 is detected by using the flow meter 220, and it is compared with the flow rate in the non-boiling state, so as to effectively determine whether boiling occurs, and reduce the heating power in the boiling state, thereby avoiding continuous boiling of water and improving the safety of the heating device.

[0105] In some embodiments of the present application, the heating device may further include a first temperature sensor 230. The first temperature sensor 230 is provided on the infusion line 400 and is used to detect a first temperature of the medium before it flows through the heating element 100. The controller 800 is further used to generate a first control variable based on the detection signal and a reference current value, determine a second control variable based on the first temperature and a target temperature, and adjust the heating power of the heating element 100 based on the first control variable and the second control variable.

[0106] In some embodiments of the present application, the heating device also includes a second temperature sensor 240; the second temperature sensor 240 is arranged on the infusion line 400, and is used to detect the second temperature of the medium after flowing through the heating element 100; the controller 800 is also used to generate a first control quantity based on the detection signal and the reference current value, determine the third control quantity based on the second temperature and the boiling point of the medium, and adjust the heating power of the heating element 100 based on the first control quantity and the third control quantity.

[0107] In some embodiments of the present application, the heating device also includes a first temperature sensor 230 and a second temperature sensor 240; the first temperature sensor 230 is arranged on the infusion line 400, and is used to detect the first temperature of the medium before it flows through the heating element 100; the second temperature sensor 240 is arranged on the infusion line 400, and is used to detect the second temperature of the medium after it flows through the heating element 100; the controller 800 is also used to generate a first control quantity based on the detection signal and the reference current value, determine the second control quantity based on the first temperature and the target temperature, determine the third control quantity based on the second temperature and the boiling point of the medium, and adjust the heating power of the heating element 100 based on the first control quantity, the second control quantity and the third control quantity.

[0108] The relevant contents of the first control quantity, the second control quantity, and the third control quantity can be referred to in the above embodiments, and this embodiment will not be described in detail here. According to the heating device of the embodiment of the present application, on the basis of the target water temperature control loop, an output temperature feedback and control loop and a fluid pump current feedback and control loop are added to limit the output temperature to or below the maximum allowable output temperature, thereby preventing the medium from boiling and improving the safety of the heating device.

[0109] It should be noted that the description of the relevant structures of the water tank connection mechanism in this embodiment can refer to the description of the aforementioned embodiments, and this embodiment can also include structures mentioned in the aforementioned embodiments but not mentioned in this embodiment.

[0110] 9 , an embodiment of the present application further provides a method for controlling a heating device. The heating device is provided on an infusion pipeline, and the control method may include the following steps:

[0111] S910: Obtain the flow rate of the medium in the infusion pipeline.

[0112] S920: When the flow rate is less than the reference flow rate, reduce the heating power of the heating device. The reference flow rate is the flow rate of the medium at the current flow rate and in a non-boiling state.

[0113] The control method for a heating device according to the embodiments of the present application can be executed by a functional module or entity in the heating device that implements the control method, such as an MCU (Microcontroller Unit). Of course, the execution entity can also be other types of devices with similar functions. The specific structure of the heating device can be referred to in the aforementioned embodiments. This embodiment uses the MCU as the execution entity for description.

[0114] The heating device in this embodiment is mainly used to heat the flowing medium. During the heating process, bubbles are generated when the medium boils, and the bubbles will cause the flow rate to decrease. Therefore, the flow rate of the medium can be used to determine whether the medium is boiling and then perform corresponding control.

[0115] It should be noted that the flow rate of the medium in the infusion line can be obtained by indirectly or directly detecting the flow rate using a detection device. For example, direct detection can use a flow meter to detect the flow rate of the medium in the infusion line, and the MCU receives the signal transmitted by the flow meter to obtain the flow rate. Alternatively, a fluid pump is provided in the infusion line, and the fluid pump operates according to a reference flow rate or speed. At different flow rates or speeds, its current is different. Therefore, the current of the fluid pump can also be detected by a current detection unit to indirectly detect the flow rate of the medium in the infusion line. The MCU receives the signal transmitted by the current detection unit to obtain the flow rate.

[0116] It should be noted that the driving state of the infusion line 400 refers to the state of the infusion line 400 when driven by the power device, which can be understood as the output state of the power device that provides power to the medium in the infusion line 400. For example, if the infusion line 400 is driven by a water pump and the speed of the water pump is 3000 r / min, the driving state of the infusion line 400 can be the speed of the water pump being 3000 r / min.

[0117] As an example, the infusion line 400 is driven by a water pump, and the set speed of the water pump is 4000 r / min. The control unit 300 receives the detection signal and determines that the flow rate corresponding to the detection signal is 9m 3 / s, and the current speed of the water pump is 4000r / min. The control unit 300 determines the reference flow rate as 10m 3 / s, since the flow rate corresponding to the detection signal is less than the reference flow rate, the control unit 300 determines that the water flow in the infusion pipeline 400 has boiled.

[0118] According to the heating device control method of the present application, the actual flow rate of the medium in the water supply pipeline is detected and compared with the flow rate in the non-boiling state, so as to effectively determine whether boiling occurs, and reduce the heating power in the boiling state, thereby avoiding continuous boiling of water and improving the safety of the heating device.

[0119] In some embodiments of the present application, obtaining the flow rate of the medium in the infusion line may include: obtaining a current signal of a fluid pump that drives the flow of the medium in the infusion line; and determining the flow rate of the medium in the infusion line based on the current signal.

[0120] In this embodiment, a fluid pump is provided in the infusion line. By detecting the current of the fluid pump, the flow rate of the medium in the infusion line is indirectly detected. The fluid pump can be equipped with components such as a current acquisition and amplification circuit and an analog-to-digital converter to detect the load current of the fluid pump and transmit the detected signal to the MCU.

[0121] In some embodiments of the present application, when the flow rate is less than a reference flow rate, the heating power of the heating device is reduced, including: comparing the current value of the current signal with the reference current value; when the comparison result is that the current value of the current signal is less than the reference current value, it is determined that the flow rate is less than the reference flow rate, and the heating power of the heating device is reduced, and the reference current value is the current value of the load current when the fluid pump is at the current speed and the medium is in a non-boiling state.

[0122] The load current of a fluid pump refers to the actual operating current of the fluid pump when driving a load. The fluid pump's load is the medium. Therefore, when the medium boils and the flow rate decreases, the fluid pump's load decreases, and the corresponding load current also decreases. This embodiment indirectly determines whether the water in the infusion line is boiling by detecting the fluid pump's load current, resulting in more precise water boiling control.

[0123] According to the control method of the heating device of the embodiment of the present application, by comparing the actual load current value of the fluid pump with the corresponding reference current value, it is possible to more accurately determine whether the medium in the infusion pipeline is boiling, thereby making the boiling control of water more precise.

[0124] In some embodiments of the present application, obtaining the flow rate of the medium in the infusion pipeline includes: obtaining a flow signal of a flow meter that detects the flow rate of the medium in the infusion pipeline; and determining the flow rate of the medium in the infusion pipeline based on the flow signal.

[0125] The MCU receives a detection signal transmitted by the flowmeter. The control unit compares the flow rate corresponding to the detection signal with a reference flow rate. If the flow rate is less than the reference flow rate, the water is deemed to be boiling; if the flow rate is equal to the reference flow rate, the medium is deemed not to be boiling. The reference flow rate is described above. The principles and usage of flowmeters are well-established technologies and will not be further elaborated in this embodiment.

[0126] In some embodiments of the present application, the control method also includes: obtaining a first temperature of the medium before it flows through the heating device; generating a first control quantity based on the flow rate and the reference flow rate, determining a second control quantity based on the first temperature and the target temperature, and adjusting the heating power of the heating body based on the first control quantity and the second control quantity.

[0127] The first temperature can be detected by a temperature sensor, which can be installed at the water inlet of the infusion pipeline. The temperature sensor can adopt an NTC (Negative Temperature Coefficient) thermal resistor, etc. The MCU is connected to the temperature sensor and receives the temperature signal fed back by the temperature sensor to obtain the first temperature of the medium before it flows through the heating device.

[0128] The target temperature is the temperature that the medium is intended to reach when heated by the heating device. The target temperature can be user-entered; for example, if the user enters 92°C, the target temperature is 92°C. Alternatively, the target temperature can be automatically set by a heating program stored in the MCU. For example, the heating program can determine the corresponding target temperature based on the local time, such as 80°C at night and 90°C during the day. The target temperature setting can be customized based on the application scenario of the heating device, and this embodiment does not impose any restrictions on this.

[0129] In some embodiments, generating the first control variable based on the detection signal and the reference flow rate refers to generating the first control variable based on the difference between the flow rate corresponding to the detection signal and the reference flow rate. When the water is not boiling, the difference between the flow rate corresponding to the detection signal and the reference flow rate is zero, and the corresponding first control variable is zero. When the water is boiling, the flow rate corresponding to the detection signal is less than the reference flow rate, and the corresponding first control variable is determined based on the difference between the two, and the specific value can be set as needed.

[0130] In some embodiments, determining the second control variable based on the first temperature and the target temperature means generating the second control variable based on the difference between the first temperature and the target temperature. When the first temperature is less than the target temperature, the second control variable may be determined based on the difference between the first temperature and the target temperature, and the specific value may be set as needed. When the first temperature is equal to the target temperature, the second control variable may be zero.

[0131] In this embodiment, the control variable is used to represent the adjustment amount for the heating element's heating power, which can be in the form of an electrical signal. The first control variable represents the adjustment amount for the heating element's heating power, determined by determining whether boiling occurs based on the flow rate. The second control variable represents the adjustment amount for the heating element's heating power, determined by the target temperature that the medium needs to reach. The MCU superimposes the first and second control variables and controls the heating element's heating power based on this superimposed control variable.

[0132] According to the heating device of the present application, the first control amount and the second control amount are superimposed, and the heating power of the heating element is controlled according to the superimposed control amount, so that the medium is heated to the target temperature while avoiding boiling of the medium.

[0133] In some embodiments of the present application, the control method also includes: obtaining a second temperature of the medium after it flows through the heating device; generating a first control quantity based on the flow rate and the reference flow rate, determining a third control quantity based on the second temperature and the boiling point of the medium, and adjusting the heating power of the heating device based on the first control quantity and the third control quantity.

[0134] The second temperature can be detected by a temperature sensor, which can be located at the outlet of the infusion line. The temperature sensor can employ, for example, an NTC (Negative Temperature Coefficient) thermal resistor. The MCU is connected to the temperature sensor and receives a temperature signal fed back from the temperature sensor to obtain the second temperature of the medium before it passes through the heating device.

[0135] The second temperature represents the output temperature of the medium flowing out of the heating element. If the second temperature is greater than or equal to the boiling point, it means that the medium has boiled. To further prevent the medium from boiling, the maximum allowable output temperature can be set according to the boiling point, and the heating power of the heating element can be reduced when the second temperature reaches the maximum allowable output temperature. A margin can be set between the maximum allowable output temperature and the boiling point, that is, the maximum allowable output temperature = boiling point - margin, and the margin can be 1 to 2°C.

[0136] According to the heating device of the present application, by superimposing the first control quantity and the third control quantity, and then controlling the heating power of the heating element according to the superimposed control quantity, the output temperature of the medium flowing out is controlled below the maximum allowable output temperature, thereby effectively avoiding boiling of the medium.

[0137] In some embodiments of the present application, the control method also includes: obtaining a first temperature of the medium before it flows through the heating device and a second temperature after it flows through the heating device; generating a first control quantity based on the flow rate and the reference flow rate, determining a second control quantity based on the first temperature and the target temperature, determining a third control quantity based on the second temperature and the boiling point of the medium, and adjusting the heating power of the heating device based on the first control quantity, the second control quantity and the third control quantity.

[0138] The method for obtaining the first temperature and the second temperature can refer to the above embodiment, and the method for determining the first control amount, the second control amount and the third control amount can refer to the above embodiment.

[0139] Referring to Figure 5 , in this embodiment, the control strategy for the heating element is to superimpose the first, second, and third control quantities, and use the superimposed control quantities to control the heating power of the heating element. The reference current in Figure 5 is the current drawn by the fluid pump at its current speed, with the medium in a non-boiling state; the load current is the actual current drawn by the fluid pump, as measured by the current detection unit; the first temperature is the temperature of the medium before it flows through the heating element, as measured by the first temperature detection unit; the second temperature is the temperature of the medium after it flows through the heating element, as measured by the second temperature detection unit; and the target temperature and maximum allowable output temperature are as described above.

[0140] According to the heating device of the embodiment of the present application, an output temperature feedback and control loop and a fluid pump current feedback and control loop are added to the target water temperature control loop, so as to limit the output temperature to or below the maximum allowable output temperature, avoid boiling of the medium, and improve the safety of the heating device.

[0141] In some embodiments of the present application, the control method further includes: acquiring an air pressure signal from an air pressure sensor; and determining the boiling point of the medium according to the air pressure signal.

[0142] The MCU is electrically connected to the air pressure sensor and internally stores the relationship between air pressure and boiling point. The MCU determines the boiling point based on the air pressure corresponding to the air pressure signal and the relationship between the air pressure and boiling point. The relationship between altitude and boiling point is well known and will not be further described in this embodiment.

[0143] In some embodiments of the present application, the control method further includes: acquiring an altitude signal from an altimeter; and determining the boiling point of the medium according to the altitude signal.

[0144] The MCU is electrically connected to the altimeter and internally stores the correspondence between altitude and boiling point. MCU 310 determines the boiling point based on the altitude corresponding to the altitude signal and the correspondence between the altitude and boiling point. The correspondence between altitude and boiling point is well known and will not be further described in this embodiment.

[0145] An embodiment of the present application further provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the control method of the heating device as described in the aforementioned embodiment is implemented.

[0146] When the computer program is executed by the processor, it implements the various processes of the above-mentioned control method embodiment of the heating device and can achieve the same technical effect. To avoid repetition, it will not be described here.

[0147] 10-14 , embodiments of the present application further provide a cooking device. The cooking device may include the heating device according to the aforementioned embodiments. The cooking device includes a body 1000 , a connecting pipe assembly 1100 , a drive pump assembly 1200 , a heating device 1300 , and an external liquid container 1400 .

[0148] The main body 1000 includes a base 1010 and a housing 1020, which together form a mounting cavity 1030. The docking pipe assembly 1100 includes a water inlet 1110. The main body 1000 has an external side 1040, and the water inlet 1110 is located on the external side 1040. The external side 1040 is configured to mate with an external liquid container 1400, and the water inlet 1110 is configured to communicate with a second docking port 1410 on the external liquid container 1400. The drive pump assembly 1200 includes a fluid pump 500, which is connected to the water inlet 1110 and is configured to establish a liquid flow path with the external liquid container 1400. The heating device 1300 is configured to heat liquid introduced into the cooking main unit 1500. The fluid pump 500 and the heating device 1300 are both located within the mounting cavity 1030. Vertically, the fluid pump 500 and the heating device 1300 are positioned above the water inlet 1110 of the cooking unit 1500, allowing the liquid within the fluid pump 500 and the heating device 1300 to flow to the water inlet 1110 under gravity. The external liquid container 1400 has a second docking port 1410. The external liquid containers 1400 can be placed side by side on the external side 1040 of the cooking unit 1000, and the water inlet 1110 of the cooking unit 1500 can be removably sealed and connected to the second docking port 1410.

[0149] When cooking unit 1500 is in operation, the pump assembly 1200 is driven to pump the liquid in the external liquid container 1400 into the cooking unit 1000 through the second docking port 1410 and the water inlet 1110. The liquid introduced into cooking unit 1500 is then heated by the heating device 1300 and then discharged into the external liquid container 1400 through the water inlet 1110 and the second docking port 1410, thereby heating the food in the external liquid container 1400. During the heating process, the liquid continuously circulates between cooking unit 1500 and the external liquid container 1400, heating the liquid in the external liquid container 1400 through cooking unit 1500. In some embodiments, the cooking device is a low-temperature slow cooker, and the maximum temperature of the liquid in the external liquid container 1400 does not exceed 1000 degrees Celsius. The liquid remains in a non-boiling state in the cooking device to ensure the normal operation of the cooking device and the low-temperature slow cooking effect of the food.

[0150] The cooking host 1500 further includes a circuit board assembly 1600 . The circuit board assembly 1600 is disposed in the mounting cavity 1030 , and the air pressure sensor 250 is disposed on the circuit board assembly 1600 .

[0151] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0152] In the description of this application, “plurality” means two or more.

[0153] Other structures of ... according to the embodiments of the present application, such as ... and ..., and operations are known to ordinary technicians in this field and will not be described in detail here.

[0154] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0155] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A heating device, characterized in that: The heating device comprises: A heating element is provided on the infusion pipeline and is used to heat the medium in the infusion pipeline; a detection unit, provided on the infusion pipeline, for detecting the flow rate of the medium and generating a detection signal according to the detection result; A control unit is electrically connected to the heating element and the detection unit, respectively, for receiving the detection signal and controlling the heating element to reduce the heating power when the flow rate corresponding to the detection signal is less than a reference flow rate, wherein the reference flow rate is the flow rate when the medium is in a non-boiling state when the infusion pipeline is in the current driving state.

2. The heating device according to claim 1, characterized in that The infusion pipeline is provided with a fluid pump, and the detection unit includes a current detection unit; The fluid pump is used to drive the medium in the infusion pipeline to flow; The current detection unit is electrically connected to the fluid pump, and is used to obtain the load current of the fluid pump to detect the flow rate of the medium, and generate the detection signal according to the current value of the load current.

3. The heating device according to claim 2, characterized in that The control unit is further configured to determine that the flow rate corresponding to the detection signal is less than a reference flow rate when the current value corresponding to the detection signal is less than a reference current value, wherein the reference current value is the current value of the load current when the fluid pump is at a current speed and the medium is in a non-boiling state.

4. The heating device according to claim 2, characterized in that The current detection unit includes: an acquisition and amplification unit, electrically connected to the fluid pump, for acquiring a load current of the fluid pump and amplifying the load current to obtain an amplified current; The analog-to-digital conversion unit is electrically connected to the acquisition and amplification unit, and is used to digitally sample the amplified current and generate the detection signal according to the sampled value.

5. The heating device according to claim 1, characterized in that The detection unit includes a flow meter; The flow meter is provided on the infusion pipeline, and is used for measuring the flow of the medium and generating the detection signal according to the flow.

6. The heating device according to any one of claims 1 to 5, characterized in that: The detection unit further includes a first temperature detection unit; The first temperature detection unit is provided on the infusion pipeline and is used to detect a first temperature of the medium before it flows through the heating element; The control unit is further configured to generate a first control quantity based on the detection signal and the reference flow, determine a second control quantity based on the first temperature and the target temperature, and adjust the heating power of the heating element based on the first control quantity and the second control quantity.

7. The heating device according to any one of claims 1 to 5, characterized in that: The detection unit further includes a second temperature detection unit; The second temperature detection unit is provided on the infusion pipeline and is used to detect the second temperature of the medium after it flows through the heating element; The control unit is further used to generate a first control quantity based on the detection signal and the reference flow, determine a third control quantity based on the second temperature and the boiling point of the medium, and adjust the heating power of the heating element based on the first control quantity and the third control quantity.

8. The heating device according to any one of claims 1 to 5, characterized in that: The detection unit further includes a first temperature detection unit and a second temperature detection unit; The first temperature detection unit is provided on the infusion pipeline and is used to detect a first temperature of the medium before it flows through the heating element; The second temperature detection unit is provided on the infusion pipeline and is used to detect the second temperature of the medium after it flows through the heating element; The control unit is further used to generate a first control quantity based on the detection signal and the reference flow, determine a second control quantity based on the first temperature and the target temperature, determine a third control quantity based on the second temperature and the boiling point of the medium, and adjust the heating power of the heating element based on the first control quantity, the second control quantity and the third control quantity.

9. The heating device according to any one of claims 1 to 5, characterized in that: The detection unit also includes an air pressure sensor; The air pressure sensor is electrically connected to the control unit and is used to detect the air pressure of the environment in which the heating device is located and generate an air pressure signal according to the air pressure; The control unit is further configured to determine the boiling point of the medium according to the air pressure signal.

10. The heating device according to any one of claims 1 to 5, characterized in that: The detection unit also includes an altimeter; The altimeter is electrically connected to the control unit and is used to detect the altitude of the environment in which the heating device is located and generate an altitude signal according to the altitude; The control unit is further configured to determine the boiling point of the medium according to the height signal.

11. A heating device, characterized in that: include: water tank; The heating device according to any one of claims 1-10, wherein the heating device is connected to the water tank and forms an infusion pipeline, the water in the water tank circulates through the infusion pipeline, and the heating device is used to heat the water flow in the infusion pipeline.

12. A heating device, characterized in that: The heating device comprises: A heating element is provided on the infusion pipeline and is used to heat the medium in the infusion pipeline; a fluid pump, used to drive the medium in the infusion pipeline to flow; a current detection circuit, electrically connected to the fluid pump, for detecting a load current of the fluid pump and generating a detection signal according to a current value of the load current; The controller is electrically connected to the heating element and the current detection circuit, respectively, and is used to receive the detection signal and control the heating element to reduce the heating power when the current value corresponding to the detection signal is less than a reference current value. The reference current value is the current value of the load current when the fluid pump is at the current speed and the medium is in a non-boiling state.

13. The heating device according to claim 12, characterized in that The current detection circuit comprises: an acquisition and amplification circuit, electrically connected to the fluid pump, for acquiring a load current of the fluid pump and amplifying the load current to obtain an amplified current; An analog-to-digital converter is electrically connected to the acquisition and amplification circuit, and is used to digitally sample the amplified current and generate the detection signal according to the sampled value.

14. The heating device according to claim 12 or 13, characterized in that The heating device further includes a first temperature sensor; The first temperature sensor is provided on the infusion pipeline and is used to detect a first temperature of the medium before it flows through the heating element; The controller is further configured to generate a first control quantity based on the detection signal and the reference current value, determine a second control quantity based on the first temperature and the target temperature, and adjust the heating power of the heating element based on the first control quantity and the second control quantity.

15. The heating device according to claim 12 or 13, characterized in that: The heating device further includes a second temperature sensor; The second temperature sensor is provided on the infusion pipeline and is used to detect a second temperature of the medium after the medium flows through the heating element; The controller is further configured to generate a first control quantity based on the detection signal and the reference current value, determine a third control quantity based on the second temperature and the boiling point of the medium, and adjust the heating power of the heating element based on the first control quantity and the third control quantity.

16. The heating device according to claim 12 or 13, characterized in that The heating device further includes a first temperature sensor and a second temperature sensor; The first temperature sensor is provided on the infusion pipeline and is used to detect a first temperature of the medium before it flows through the heating element; The second temperature sensor is provided on the infusion pipeline and is used to detect a second temperature of the medium after the medium flows through the heating element; The controller is further used to generate a first control quantity based on the detection signal and the reference current value, determine a second control quantity based on the first temperature and the target temperature, determine a third control quantity based on the second temperature and the boiling point of the medium, and adjust the heating power of the heating element based on the first control quantity, the second control quantity and the third control quantity.

17. The heating device according to claim 12 or 13, characterized in that The heating device also includes an air pressure sensor; The air pressure sensor is electrically connected to the controller and is used to detect the air pressure of the environment in which the heating device is located and generate an air pressure signal according to the air pressure; The controller is further configured to determine the boiling point of the medium according to the air pressure signal.

18. The heating device according to claim 12 or 13, characterized in that The heating device also includes an altimeter; The altimeter is electrically connected to the controller and is used to detect the altitude of the environment in which the heating device is located and generate an altitude signal according to the altitude; The controller is further configured to determine the boiling point of the medium according to the height signal.

19. A heating device, characterized in that: The heating device comprises: A heating element is provided on the infusion pipeline and is used to heat the medium in the infusion pipeline; a flow meter, provided on the infusion pipeline, for measuring the flow of the medium and generating a detection signal according to the flow; The controller is electrically connected to the heating element and the flow meter, respectively, and is used to receive the detection signal and control the heating element to reduce the heating power when the flow corresponding to the detection signal is less than a reference flow. The reference flow is the flow rate when the medium is in a non-boiling state when the infusion pipeline is in the current driving state.

20. The heating device according to claim 19, characterized in that The heating device further includes a first temperature sensor; The first temperature sensor is provided on the infusion pipeline and is used to detect a first temperature of the medium before it flows through the heating element; The controller is further configured to generate a first control quantity according to the detection signal and the reference flow, determine a second control quantity according to the first temperature and the target temperature, and adjust the heating power of the heating element according to the first control quantity and the second control quantity.

21. The heating device according to claim 19, characterized in that The heating device further includes a second temperature sensor; The second temperature sensor is provided on the infusion pipeline and is used to detect a second temperature of the medium after the medium flows through the heating element; The controller is further configured to generate a first control quantity based on the detection signal and the reference flow rate, determine a third control quantity based on the second temperature and the boiling point of the medium, and adjust the heating power of the heating element based on the first control quantity and the third control quantity.

22. The heating device according to claim 19, characterized in that The heating device further includes a first temperature sensor and a second temperature sensor; The first temperature sensor is provided on the infusion pipeline and is used to detect a first temperature of the medium before it flows through the heating element; The second temperature sensor is provided on the infusion pipeline and is used to detect a second temperature of the medium after the medium flows through the heating element; The controller is also used to generate a first control quantity based on the detection signal and the reference flow, determine a second control quantity based on the first temperature and the target temperature, determine a third control quantity based on the second temperature and the boiling point of the medium, and adjust the heating power of the heating element based on the first control quantity, the second control quantity and the third control quantity.

23. A method for controlling a heating device, characterized in that: The heating device is provided on the infusion pipeline, and the control method includes: Obtaining the flow rate of the medium in the infusion pipeline; When the flow rate is less than a reference flow rate, the heating power of the heating device is reduced. The reference flow rate is the flow rate of the medium at the current flow rate and in a non-boiling state.

24. The control method according to claim 23, characterized in that: The obtaining of the flow rate of the medium in the infusion pipeline includes: Acquiring a current signal of a fluid pump that drives the medium in the infusion pipeline; The flow rate of the medium in the infusion pipeline is determined according to the current signal.

25. The control method according to claim 24, characterized in that: When the flow rate is less than the reference flow rate, reducing the heating power of the heating device includes: comparing the current value of the current signal with a reference current value; When the comparison result is that the current value of the current signal is less than the reference current value, it is determined that the flow rate is less than the reference flow rate, and the heating power of the heating device is reduced. The reference current value is the current value of the load current when the fluid pump is at the current speed and the medium is in a non-boiling state.

26. The control method according to claim 23, characterized in that: The obtaining of the flow rate of the medium in the infusion pipeline includes: Acquiring a flow signal from a flow meter for detecting the flow of a medium in the infusion pipeline; The flow rate of the medium in the infusion pipeline is determined according to the flow signal.

27. The control method according to any one of claims 23 to 26, characterized in that: The control method further includes: obtaining a first temperature of the medium before the medium passes through the heating device; A first control variable is generated according to the flow rate and the reference flow rate, a second control variable is determined according to the first temperature and a target temperature, and the heating power of the heating device is adjusted according to the first control variable and the second control variable.

28. The control method according to any one of claims 23 to 26, characterized in that: The control method further includes: obtaining a second temperature of the medium after the medium passes through the heating device; A first control variable is generated according to the flow rate and the reference flow rate, a third control variable is determined according to the second temperature and the boiling point of the medium, and the heating power of the heating device is adjusted according to the first control variable and the third control variable.

29. The control method according to any one of claims 23 to 26, characterized in that: The control method further includes: obtaining a first temperature of the medium before the medium passes through the heating device and a second temperature of the medium after the medium passes through the heating device; A first control quantity is generated according to the flow rate and the reference flow rate, a second control quantity is determined according to the first temperature and the target temperature, a third control quantity is determined according to the second temperature and the boiling point of the medium, and the heating power of the heating device is adjusted according to the first control quantity, the second control quantity and the third control quantity.

30. The control method according to any one of claims 23 to 26, characterized in that: The control method further includes: Get the air pressure signal from the air pressure sensor; The boiling point of the medium is determined based on the gas pressure signal.

31. The control method according to any one of claims 23 to 26, characterized in that: The control method further includes: Get the altitude signal of the altimeter; The boiling point of the medium is determined based on the height signal.

32. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the control method of the heating device according to any one of claims 23 to 31 is implemented.

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