Heating device, heating apparatus, control method, and storage medium

Abstract

The application discloses a heating device, a heating equipment, a control method and a storage medium, and belongs to the technical field of heating equipment. The heating device comprises a heating body, which is arranged on an infusion pipeline and used for heating medium in the infusion pipeline; a detection unit, which is arranged on the infusion pipeline and used for detecting the flow of the medium and generating a detection signal according to a detection result; and a control unit, which is electrically connected with the heating body and the detection unit respectively, used for receiving the detection signal, and controlling the heating body 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 at a current flow rate and in a non-boiling state. According to the heating device, the flow of the medium is detected, compared with the flow in the boiling state, and it is judged whether boiling occurs, and then the heating power is reduced in the boiling state, so that continuous boiling of water is avoided, and the safety of the heating device is improved.

Description

TECHNICAL FIELD

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

[0002] Some heating apparatuses need to avoid boiling of the medium during the heating process of the medium, such as low-temperature slow cooking machines, etc. Boiling medium has safety hazards, which may cause user scalding or equipment damage, etc. At present, such heating apparatuses lack boiling control schemes, and the medium is easy to boil, thereby causing adverse effects. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a heating device, a heating apparatus, a control method and a storage medium, which controls the boiling of the medium during the heating process of the medium, avoids water boiling, and improves safety.

[0004] In a first aspect, the present application provides a heating device, comprising: a heating body arranged on a liquid delivery pipeline for heating the medium in the liquid delivery pipeline; a detection unit arranged on the liquid delivery pipeline for detecting the flow of the medium and generating a detection signal according to the detection result; and a control unit electrically connected with the heating body and the detection unit, for receiving the detection signal and controlling the heating body to reduce the heating power when the flow corresponding to the detection signal is less than a reference flow, the reference flow being the flow of the medium in a non-boiling state when the liquid delivery pipeline is in a current driving state.

[0005] According to the heating device of the present application, the actual flow of the medium in the water delivery pipeline is detected, which is compared with the flow in the non-boiling state, so as to effectively judge whether boiling occurs, and the heating power is reduced in the boiling case, thereby avoiding continuous boiling of water and improving the safety of the heating device.

[0006] In a second aspect, the present application provides a heating apparatus, comprising: a water tank; and a heating device according to the preceding embodiment, which is connected with the water tank and forms a liquid delivery pipeline, water in the water tank is circulated through the liquid delivery pipeline, and the heating device is used for heating the water flow in the liquid delivery pipeline.

[0007] According to the heating apparatus of the present application, the actual flow of the medium in the water delivery pipeline is detected, which is compared with the flow in the non-boiling state, so as to effectively judge whether boiling occurs, and the heating power is reduced in the boiling case, thereby avoiding continuous boiling of water and improving the safety of the heating device.

[0008] In a third aspect, the application provides a heating device, comprising: a heating body arranged on a liquid delivery pipeline and used for heating a medium in the liquid delivery pipeline; a fluid pump used for driving the medium in the liquid delivery pipeline to flow; a current detection circuit electrically connected with the fluid pump and used for detecting a load current of the fluid pump and generating a detection signal according to a current value of the load current; and a controller electrically connected with the heating body and the current detection circuit respectively, used for receiving the detection signal and controlling the heating body to reduce a heating power when the current value corresponding to the detection signal is less than a reference current value, the reference current value being a current value of the load current of the fluid pump at a current rotating speed and when the medium is in a non-boiling state.

[0009] In a fourth aspect, the application provides a heating device, comprising: a heating body arranged on a liquid delivery pipeline and used for heating a medium in the liquid delivery pipeline; a flow meter arranged on the liquid delivery pipeline and used for measuring a flow of the medium and generating a detection signal according to the flow; and a controller electrically connected with the heating body and the flow meter respectively, used for receiving the detection signal and controlling the heating body to reduce a heating power when a flow corresponding to the detection signal is less than a reference flow, the reference flow being a flow of the medium in a non-boiling state when the liquid delivery pipeline is in a current driving state.

[0010] According to the heating device, the actual flow of the medium in the liquid delivery pipeline is detected by the flow meter, and the actual flow is compared with the flow in the non-boiling state, so that whether boiling occurs is effectively determined, and the heating power is reduced in the boiling state, thereby avoiding continuous boiling of the water and improving the safety of the heating device.

[0011] According to an embodiment of the application, the heating device further comprises a first temperature sensor arranged on the liquid delivery pipeline and used for detecting a first temperature of the medium before the medium flows through the heating body; and the controller is further used for generating a first control amount according to the detection signal and the reference flow, determining a second control amount according to the first temperature and a target temperature, and adjusting the heating power of the heating body according to the first control amount and the second control amount.

[0012] In a fifth aspect, the application provides a control method of a heating device arranged on a liquid delivery pipeline, comprising: acquiring a flow of a medium in the liquid delivery pipeline; and reducing a heating power of the heating device when the flow is less than a reference flow, the reference flow being a flow of the medium at a current flow rate and in a non-boiling state.

[0013] According to the heating device control method, the actual flow of the medium in the water delivery pipeline is detected, compared with the flow in the un-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.

[0014] In a sixth aspect, the present application provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the control method of the heating device as described in the foregoing embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0015] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:

[0016] Figure 1 is one of the structural schematic diagrams of the heating device provided by the embodiments of the present application;

[0017] Figure 2 is another of the structural schematic diagrams of the heating device provided by the embodiments of the present application;

[0018] Figure 3 is a third of the structural schematic diagrams of the heating device provided by the embodiments of the present application;

[0019] Figure 4 is a fourth of the structural schematic diagrams of the heating device provided by the embodiments of the present application;

[0020] Figure 5 is a control logic diagram of the heating device provided by the embodiments of the present application;

[0021] Figure 6 is one of the structural schematic diagrams of the heating device provided by the embodiments of the present application;

[0022] Figure 7 is a fifth of the structural schematic diagrams of the heating device provided by the embodiments of the present application;

[0023] Figure 8 is a sixth of the structural schematic diagrams of the heating device provided by the embodiments of the present application;

[0024] Figure 9 is a flowchart of the control method of the heating device provided by the embodiments of the present application;

[0025] Figure 10 is a second of the structural schematic diagrams of the heating device provided by the embodiments of the present application;

[0026] Figure 11 is a third of the structural schematic diagrams of the heating device provided by the embodiments of the present application;

[0027] Figure 12 This is the fourth schematic diagram of the heating device provided in the embodiments of this application;

[0028] Figure 13 This is the fifth schematic diagram of the heating device provided in the embodiments of this application;

[0029] Figure 14 This is the sixth schematic diagram of the heating device provided in the embodiments of this application. Detailed Implementation

[0030] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0031] Reference Figure 1 The heating device according to an embodiment of this application includes a heating element 100, a detection unit 200, and a control unit 300. The heating device is connected to an infusion line 400 to heat the medium within the infusion line 400. Both the heating element 100 and the detection unit 200 are disposed on the infusion line, and the control unit 300 is electrically connected to both the heating element 100 and the detection unit 200. The heating element 100 is used to heat the medium within the infusion line 400; the detection unit 200 is used to detect the flow rate 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, when the flow rate corresponding to the detection signal is less than a reference flow rate, controls the heating element 100 to reduce its heating power. The reference flow rate is the flow rate of the medium in a non-boiling state when the infusion line is in its current driving state.

[0032] It should be noted that 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 these bubbles cause the flow rate to decrease. Therefore, the flow rate of the medium can be used to determine whether the medium has boiled, and then corresponding control can be performed. Figure 1 The arrows in the diagram indicate the direction of the medium; however, in some embodiments, the direction of the medium can also be... Figure 1 The directions are opposite. The medium can be water or various types of oil, etc. This embodiment uses water as an example for explanation.

[0033] Because the liquid flows and circulates in the infusion line 400, in some embodiments, boiling of the liquid can lead to impeded flow and steam ejection, causing the cooking equipment to malfunction. Therefore, it is necessary to prevent the liquid in the infusion line 400 from boiling.

[0034] In some embodiments, the infusion pipeline 400 can be a water circulation loop on a water supply device, such as the water inlet and outlet of the infusion pipeline 400 are both connected to a water storage cavity in a water tank, water in the water storage cavity flows into the infusion pipeline 400 from the water inlet, and then flows back to the water storage cavity from the water outlet.

[0035] In some embodiments, the infusion pipeline 400 can also be a water path between two or more devices, such as the infusion pipeline 400 is arranged between a water tank and a water outlet mechanism (such as a faucet), 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.

[0036] In some embodiments, the heating body 100 can be a thick-film heater, which usually forms a heating film layer on a substrate using a screen printing process. The substrate can be columnar to form a heating channel, and the heat generated by the heating film layer is radiated to the heating channel through the substrate. The heating channel is in communication with the infusion pipeline 400, and the medium can flow into the heating channel through a section of the infusion pipeline 400, be heated, and then flow out of the heating channel.

[0037] In some embodiments, the heating body 100 can also use PTC ceramic heating elements or heating rods, etc. Such heating bodies 100 usually need to be inserted into the infusion pipeline.

[0038] In the present embodiment, the detection unit 200 can detect the flow rate of the medium in the infusion pipeline 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 represent the flow rate using voltage or current values; or the detection signal can also be a data stream, the content of which can represent the flow rate.

[0039] It should be noted that the driving state of the infusion pipeline 400 refers to the state of the infusion pipeline 400 under the driving of the power device, which can be understood as the output state of the power device that provides power to the medium in the infusion pipeline 400. For example, the infusion pipeline 400 is driven by a water pump, and the rotational speed of the water pump is 3000 r / min. The driving state of the infusion pipeline 400 can be that the rotational speed of the water pump is 3000 r / min.

[0040] As an example, the infusion pipeline 400 is driven by a water pump, and the set rotational 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 9 m 3 / s, and the current rotational speed of the water pump is 4000 r / min. The control unit 300 determines that the reference flow rate is 10 m 3 / s according to the rotational speed of 4000 r / min. 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.

[0041] Referring to Figure 2 In some embodiments, the control unit 300 can comprise a MCU 310 (Microcontroller Unit). The MCU 310 can be configured with corresponding program inside to perform the identification and judgment process of the detection signal. The MCU 310 can store the comparison content of the same type as the content of the detection signal corresponding to the reference flow inside, and the direct mapping relationship between the comparison content and the reference flow is the same as the mapping relationship between the detection signal and the content of the detection signal. The MCU 310 can thus directly compare the content of the detection signal with the comparison content to determine the size relationship between the flow corresponding to the detection signal and the reference flow.

[0042] As an example, the voltage value of the detection signal is used to represent the flow, and the MCU 310 can store the reference voltage value corresponding to the reference flow. After receiving the detection signal, the MCU 310 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 corresponding to the detection signal is less than the reference flow, 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 corresponding to the detection signal is equal to the reference flow, and the water does not boil.

[0043] It can be understood that the heating power of the heating body 100 can be determined by the voltage value or current value of the power supply according to its working characteristics, so that the heating power of the heating body 100 can be increased by increasing the voltage value or current value of the power supply, or the heating power of the heating body 100 can be reduced by reducing the voltage value or current value of the power supply.

[0044] 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 body 100 to control the heating body 100. The MCU 310 can generate a corresponding control signal by configuring the corresponding heating parameter in the control program to adjust the heating power of the heating body 100. After determining that the flow corresponding to the detection signal is less than the reference flow, the MCU 310 can reduce the heating parameter according to the reference proportion or amplitude.

[0045] In some embodiments, in order to improve the driving effect on the heating body 100, the control unit 300 can further include a driving circuit 320 electrically connected with the MCU 310 and the heating body 100, respectively. The driving circuit 320 receives the control signal and generates a corresponding driving signal according to the control signal, and transmits the driving signal to the heating body 100 to drive the heating body 100. The driving circuit 320 is used to drive the heating body 100 to operate, and the specific type thereof can be selected according to the specific type of the heating body 100. For example, the heating body 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 bodies 100 and driving circuits 320 are mature technologies, and will not be described here again.

[0046] According to the heating device provided in the application, the actual flow of the medium in the water conveying pipeline is detected, and the flow is compared with the flow in the non-boiling state, so that it is effectively judged whether boiling occurs, and the heating power is reduced in the boiling state, thereby avoiding continuous boiling of water and improving the safety of the heating device.

[0047] Reference Figure 2 In some embodiments of the application, the fluid pump 500 is arranged on the infusion pipeline 400, and the detection unit 200 includes a current detection unit 210. The fluid pump 500 is used to drive the medium in the infusion pipeline 400 to flow. The current detection unit 200 is electrically connected with the fluid pump 500, and is used to acquire the load current of the fluid pump 500, so as to detect the flow of the medium and generate a detection signal according to the current value of the load current. The fluid pump 500 includes a non-self-priming water pump and a self-priming water pump. The non-self-priming water pump includes a centrifugal pump and other pumps without air suction function. The self-priming water pump includes a vacuum centrifugal pump and other pumps with air suction function. In some embodiments, the fluid pump 500 is a centrifugal pump.

[0048] It can be understood that the load current of the fluid pump 500 refers to the actual working current of the fluid pump 500 when dragging the load. The load of the fluid pump 500 is the medium, so when the medium boils and the flow decreases, the load of the fluid pump 500 decreases, and the corresponding load current also decreases.

[0049] According to the heating device provided in the application, the load current of the fluid pump 500 is detected to indirectly judge whether the medium in the infusion pipeline 400 boils, so that the boiling control of the medium is more accurate.

[0050] In some embodiments of the application, the control unit 300 is further configured to determine that the flow corresponding to the detection signal is less than the reference flow when the current value corresponding to the detection signal is less than the reference current value. The reference current value is the current value of the load current of the fluid pump 500 at the current speed and in the non-boiling state of the medium.

[0051] As an example, the MCU 310 can store a reference current value, and after receiving the detection signal, compare 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 corresponding to the detection signal is less than the reference flow, and the medium is boiling. If the current value of the detection signal is equal to the reference current value, it is determined that the flow corresponding to the detection signal is equal to the reference flow, and the medium is not boiling.

[0052] It should be noted that the fluid pump 500 can be a pump with adjustable flow. According to different operating environments, the fluid pump 500 can operate at different speeds. Therefore, the MCU 310 needs to store reference current values corresponding to different speeds, and when receiving the 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.

[0053] 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 according to the speed parameter in the fluid pump control program.

[0054] In some embodiments, the fluid pump 500 can 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 speed of the fluid pump 500.

[0055] According to the heating device of the embodiments 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, so as to more accurately determine whether the medium in the infusion pipeline 400 is boiling.

[0056] In some embodiments of the present application, the current detection unit 210 can 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 according to the sampling value.

[0057] It can be understood that, in order to facilitate the MCU 310 to identify and judge the detection signal, the load current of the fluid pump 500 can be pre-processed to obtain a signal suitable for the MCU 310 to process. The load current of the fluid pump 500 is not suitable for direct processing, and therefore needs to be collected, for example, a current sensor or a resistance in the electrical circuit of the fluid pump 500 can be used for collection. In order to facilitate the processing of the sampled current and improve the accuracy, the collected current can be amplified, and specifically, a sampling current amplifier can be used. In order to improve the identification accuracy of the MCU 310, the amplified current can also be digitally sampled to generate a digital signal. The specific circuit structure and principle of current signal collection, amplification and analog-to-digital conversion are mature technologies, and will not be described here in the embodiment.

[0058] With reference to Figure 4 In some embodiments of the present application, the detection unit 200 can further include a flow meter 220. The flow meter 220 is arranged on the infusion pipeline 400 and is electrically connected to the control unit 300. The flow meter 220 is used to measure the flow of the medium and generate a detection signal according to the flow.

[0059] In the embodiment, the control unit 300 receives the detection signal transmitted by the flow meter 220. The control unit 300 compares the flow corresponding to the detection signal with the reference flow, and determines that the water boils when the flow is less than the reference flow, and determines that the medium does not boil when the flow is equal to the reference flow; wherein the reference flow can refer to the foregoing. The principle and use of the flow meter 220 are mature technologies, and will not be described here in the embodiment.

[0060] In some embodiments of the present application, the detection unit 200 can further 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 flowing through the heating body 100; the control unit 300 is further used to generate a first control amount according to the detection signal and the reference flow, determine a second control amount according to the first temperature and the target temperature, and adjust the heating power of the heating body 100 according to the first control amount and the second control amount.

[0061] The control unit 300 includes an MCU 310, the MCU 310 is electrically connected to the first temperature detection unit 230 and receives the signal sent by the first temperature detection unit 230 to obtain the first temperature. The MCU 310 can also be electrically connected to the heating body 100 and send a control signal to the heating body 100 to control the heating power of the heating body 100. The first temperature detection unit 230 can be composed of a sensor device, such as an NTC (Negative Temperature Coefficient) thermal resistor.

[0062] The target temperature refers to the temperature that the medium needs to reach under the heating action of the heating device. The target temperature can be input by the user, such as the user inputting 92℃, and the target temperature is 92℃. Alternatively, the target temperature can also be automatically set by the heating program stored in the MCU 310, for example, the heating program determines the corresponding target temperature according to the local time, 90℃ at night and 80℃ during the day, etc. The setting of the target temperature can be set according to the application scene of the heating device, which is not limited in this embodiment.

[0063] In some embodiments, generating the first control quantity according to the detection signal and the reference flow rate refers to generating the first control quantity according to the difference between the flow rate corresponding to the detection signal and the reference flow rate. When the water does not boil, the difference between the flow rate corresponding to the detection signal and the reference flow rate is zero, and the corresponding first control quantity is zero; when the water boils, the flow rate corresponding to the detection signal is less than the reference flow rate, and the corresponding first control quantity can be determined according to the difference between the two. The specific value can be set according to the demand.

[0064] In some embodiments, determining the second control quantity according to the first temperature and the target temperature refers to generating the second control quantity according to the difference between the first temperature and the target temperature. When the first temperature is less than the target temperature, the second control quantity can be determined according to the difference between the two. The specific value can be set according to the demand; when the first temperature is equal to the target temperature, the second control quantity can be zero.

[0065] In this embodiment, the control quantity is used to represent the adjustment amount of the heating power of the heating body 100, which can be in the form of an electrical signal. The first control quantity represents the adjustment amount of the heating power of the heating body 100 determined according to whether the flow rate is boiling, and the second control quantity represents the adjustment amount of the heating power of the heating body 100 determined according to the target temperature that the medium needs to reach. The first control quantity and the second control quantity of the MCU 310 are superimposed, and the heating power of the heating body 100 is controlled according to the superimposed control quantity. The superimposition method includes direct addition, average subtraction or weighted average superimposition.

[0066] According to the heating device of the present application, the first control quantity and the second control quantity are superimposed, and the heating power of the heating body 100 is controlled according to the superimposed control quantity, so as to heat the medium to the target temperature under the premise of avoiding boiling of the medium.

[0067] In some embodiments of the present application, the detecting unit 200 can further comprise a second temperature detecting unit 240, which is arranged on the infusion pipeline 400 and used for detecting a second temperature of the medium after flowing through the heating body 100; the control unit 300 is further used for generating a first control quantity according to the detecting signal and the reference flow, determining a third control quantity according to the second temperature and the boiling point of the medium, and adjusting the heating power of the heating body 100 according to the first control quantity and the third control quantity.

[0068] The control unit 300 comprises an MCU 310, which is electrically connected with the second temperature detecting unit 240 and receives the signal sent by the second temperature detecting unit 240 to obtain the second temperature. The MCU 310 can also be electrically connected with the heating body 100 and send a control signal to the heating body 100 to control the heating power of the heating body 100. The second temperature detecting unit 240 can also be composed of a sensor, such as an NTC thermal resistor.

[0069] In some embodiments, the third control quantity is determined according to the difference between the second temperature and the boiling point. When the second temperature is less than the boiling point, the third control quantity can be determined according to the difference between the two, and the specific value can be set according to the requirement; when the second temperature is equal to the boiling point, the third control quantity can be zero. The determination method of the first control quantity can refer to the foregoing embodiments.

[0070] The second temperature represents the output temperature of the medium flowing out of the heating body 100. If the second temperature is greater than or equal to the boiling point, it means that the medium has boiled. In order to further avoid the boiling of the medium, the highest allowable output temperature can be set according to the boiling point, and the heating power of the heating body 100 is reduced when the second temperature reaches the highest allowable output temperature. The highest allowable output temperature and the boiling point can be set with a margin, i.e. the highest allowable output temperature = boiling point - margin, and the margin can be 1-2℃.

[0071] According to the heating device of the present application, the heating power of the heating body 100 is controlled according to the superimposed control quantity of the first control quantity and the third control quantity, and the output temperature of the medium is controlled below the highest allowable output temperature, so that the boiling of the medium is effectively avoided.

[0072] In some embodiments of the present application, the detection unit 200 can further 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 pipeline 400 and used for detecting a first temperature of the medium before flowing through the heating body 100; the second temperature detection unit 240 is arranged on the infusion pipeline 400 and used for detecting a second temperature of the medium after flowing through the heating body 100; and the control unit 300 is further used for generating a first control quantity according to the detection signal and the reference flow, determining a second control quantity according to the first temperature and the target temperature, determining a third control quantity according to the second temperature and the boiling point of the medium, and adjusting the heating power of the heating body 100 according to the first control quantity, the second control quantity and the third control quantity.

[0073] The control unit 300 includes an MCU 310, which is electrically connected with the first temperature detection unit 230 and the second temperature detection unit 240 respectively, receives the signals sent by the first temperature detection unit 230 and the second temperature detection unit 240, and obtains the first temperature and the second temperature. The determination manners of the first control quantity, the second control quantity and the third control quantity can refer to the foregoing embodiments.

[0074] Reference Figure 5 In the present embodiment, the control strategy of the heating body 100 is to superimpose the first control quantity, the second control quantity and the third control quantity, and control the heating power of the heating body 100 by using the superimposed control quantity. Figure 5 The reference current in the formula is a current of the fluid pump 500 at the current rotating speed and when the medium is in a non-boiling state; the load current is an actual current of the fluid pump 500, which is obtained by the current detection unit 210; the first temperature is a temperature of the medium before flowing through the heating body 100, which is obtained by the first temperature detection unit 230; the second temperature is a temperature of the medium after flowing through the heating body 100, which is obtained by the second temperature detection unit 240; and the target temperature and the maximum allowable output temperature refer to the foregoing.

[0075] The heating device according to the embodiments of the present application adds the output temperature feedback and control loop and the fluid pump current feedback and control loop on the basis of the target water temperature control loop, limits the output temperature to be below the maximum allowable output temperature, avoids the boiling phenomenon of the medium, and improves the safety of the heating device.

[0076] In some embodiments of the present application, the detection unit 200 can further include an air pressure sensor 250. The air pressure sensor 250 is electrically connected with the control unit 300, used for detecting the air pressure of the environment where the heating device is located, and generating an air pressure signal according to the air pressure; and the control unit 300 is further used for determining the boiling point of the medium according to the air pressure signal.

[0077] The control unit 300 comprises an MCU 310, which is electrically connected with the air pressure sensor 250. The MCU 310 internally stores the corresponding relationship between air pressure and boiling point. The MCU 310 determines the corresponding boiling point according to the air pressure corresponding to the air pressure signal and the corresponding relationship between the air pressure and the boiling point.

[0078] In some embodiments of the present application, the detection unit 200 can further comprise an altimeter 260. The altimeter 260 is electrically connected with the control unit 300, and is configured to detect the altitude of the environment where the heating device is located, and generate an altitude signal according to the altitude; the control unit 300 is further configured to determine the boiling point of the medium according to the altitude signal.

[0079] The control unit 300 comprises an MCU 310, which is electrically connected with the altimeter 260. The MCU 310 internally stores the corresponding relationship between altitude and boiling point. The MCU 310 determines the corresponding boiling point according to the altitude corresponding to the altitude signal and the corresponding relationship between the altitude and the boiling point.

[0080] According to the heating device of the embodiments of the present application, the boiling point of the medium in the environment where the heating device is located can be accurately determined, and the medium can be heated more accurately without boiling, thereby improving the safety of the heating device.

[0081] With reference to Figure 6 The embodiments of the present application also provide a heating device. The heating device comprises a water tank 600 and a heating device according to the foregoing. The heating device is connected with the water tank 600 and forms a liquid delivery pipeline 400. The water in the water tank 600 is circulated through the liquid delivery pipeline. The heating device 400 is configured to heat the water flow in the liquid delivery pipeline.

[0082] According to the heating device of the present application, the actual flow of the medium in the water delivery pipeline is detected, which is compared with the flow in the unboiling state, so as to effectively determine whether boiling occurs, and reduce the heating power in the boiling state, thereby avoiding continuous boiling of the water and improving the safety of the heating device.

[0083] In the present embodiment, the heating device is controlled in combination with a reference water temperature control loop, an output temperature feedback and control loop and a fluid pump current feedback and control loop. When the water in the water tank 600 is heated, the water temperature is limited to the maximum allowable output temperature or below, so as to avoid boiling of the water flow and improve the safety of the heating device.

[0084] With reference to Figure 7The embodiment of the present application also provides a heating device. The heating device comprises a heating body 100, a fluid pump 500, a current detection circuit 700 and a controller 800. The heating body 100 is arranged on a fluid delivery pipeline 400 and used for heating medium in the fluid delivery pipeline 400; the fluid pump 500 is used for driving the medium in the fluid delivery pipeline 400 to flow; the current detection circuit 700 is electrically connected with the fluid pump 500 and used for detecting load current of the fluid pump 500 and generating a detection signal according to the current value of the load current; and the controller 800 is electrically connected with the heating body 100 and the current detection circuit 700 respectively, used for receiving the detection signal, and controlling the heating body 100 to reduce 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 of the fluid pump 500 at the current rotating speed and when the medium is in a non-boiling state.

[0085] It can be understood that the load current of the fluid pump 500 refers to the actual working current of the fluid pump 500 when dragging 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.

[0086] 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 a 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.

[0087] It should be noted that the fluid pump 500 can be a pump with adjustable flow rate. According to different operating environments, the fluid pump 500 can operate at different rotating speeds. Therefore, the controller 800 needs to store reference current values corresponding to different rotating speeds, and when receiving the detection signal, the current rotating speed of the fluid pump 500 is obtained, and then the current value of the detection signal is compared with the reference current value corresponding to the current rotating speed.

[0088] In some embodiments of the present application, the current detection circuit 700 can comprise an acquisition and amplification circuit 710 and an analog-to-digital converter 720. The acquisition and amplification circuit 710 is electrically connected with the fluid pump 500 and used for acquiring the load current of the fluid pump 500 and amplifying the load current to obtain an amplified current; and the analog-to-digital converter 720 is electrically connected with the acquisition and amplification circuit 710 and used for digitally sampling the amplified current and generating the detection signal according to the sampling value.

[0089] It can be understood that, in order to facilitate the identification and judgment of the detection signal by the controller 800, the load current of the fluid pump 500 can be pre-processed 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, and therefore needs to be collected, for example, a current sensor or an electrical circuit of the fluid pump 500 can be used to collect the load current by using a resistor. In order to facilitate the processing of the sampled current and improve the accuracy, the collected current can be amplified, for example, a sampling current amplifier can be used. In order to improve the identification accuracy of the controller 800, the amplified current can also be digitally sampled to generate a digital signal. The specific circuit structure and principle of the current signal collection, amplification and analog-to-digital conversion have mature technologies, and the present embodiment will not be repeated here.

[0090] In some embodiments of the present application, the heating device can further include a first temperature sensor 230. The first temperature sensor 230 is arranged on the infusion pipeline 400 and is used to detect a first temperature of the medium before flowing through the heating body 100; the controller 800 is further configured to generate a first control amount according to the detection signal and the reference current value, determine a second control amount according to the first temperature and the target temperature, and adjust the heating power of the heating body 100 according to the first control amount and the second control amount.

[0091] According to the heating device of the present application, the first control amount and the second control amount are superimposed, and then the heating power of the heating body 100 is controlled according to the superimposed control amount, so that the medium is heated to the target temperature under the premise of avoiding boiling of the medium.

[0092] In some embodiments of the present application, the heating device can further include a second temperature sensor 240; the second temperature sensor 240 is arranged on the infusion pipeline 400 and is used to detect a second temperature of the medium after flowing through the heating body 100; the controller 800 is further configured to generate a first control amount according to the detection signal and the reference current value, determine a third control amount according to the second temperature and the boiling point of the medium, and adjust the heating power of the heating body 100 according to the first control amount and the third control amount.

[0093] According to the heating device of the present application, the first control amount and the third control amount are superimposed, and then the heating power of the heating body 100 is controlled according to the superimposed control amount, so that the output temperature of the medium is controlled below the highest allowable output temperature, thereby effectively avoiding boiling of the medium.

[0094] In some embodiments of the present application, the heating device further comprises a first temperature sensor 230 and a second temperature sensor 240; the first temperature sensor 230 is arranged on the infusion pipeline 400 and used to detect a first temperature of the medium before flowing through the heating body 100; the second temperature sensor 240 is arranged on the infusion pipeline 400 and used to detect a second temperature of the medium after flowing through the heating body 100; the controller 800 is further used to generate a first control quantity according to the detection signal and the reference current value, determine a second control quantity according to the first temperature and the target temperature, determine a third control quantity according to the second temperature and the boiling point of the medium, and adjust the heating power of the heating body 100 according to the first control quantity, the second control quantity and the third control quantity.

[0095] The controller 800 is electrically connected with the first temperature detection unit 230 and the second temperature detection unit 240 respectively, receives the signals sent by the first temperature detection unit 230 and the second temperature detection unit 240, and obtains the first temperature and the second temperature. The determination manners of the first control quantity, the second control quantity and the third control quantity can refer to the foregoing embodiments.

[0096] According to the heating device of the embodiments of the present application, on the basis of the target water temperature control loop, the output temperature feedback and control loop and the fluid pump current feedback and control loop are added, the output temperature is limited to the highest allowable output temperature or below, the boiling phenomenon of the medium is avoided, and the safety of the heating device is improved.

[0097] It should be noted that the description of the related structure of the water tank connecting mechanism in the present embodiment can refer to the description of the foregoing embodiments. Also, the present embodiment can also include the structures mentioned in the foregoing embodiments but not mentioned in the present embodiment.

[0098] With reference to Figure 8 The embodiments of the present application also provide a heating device. The heating device comprises a heating body 100, a flow meter 220 and a controller 800; the heating body 100 is arranged on an infusion pipeline 400 and used to heat the medium in the infusion pipeline 400; the flow meter 220 is arranged on the infusion pipeline 400 and used to measure the flow of the medium and generate a detection signal according to the flow; the controller 800 is electrically connected with the heating body 100 and the flow meter 220 respectively, used to receive the detection signal, and when the flow corresponding to the detection signal is less than a reference flow, control the heating body 100 to reduce the heating power, the reference flow being the flow of the medium in a non-boiling state when the infusion pipeline 400 is in a current driving state.

[0099] It should be noted that the heating device in the present embodiment is mainly used for heating the flowing medium. In the heating process, bubbles will be generated when the medium boils, and the bubbles will cause the flow to decrease, so whether the medium boils can be determined by using the flow of the medium, and then corresponding control is performed. Figure 8The arrow in the figure indicates the direction of the medium, and of course in some embodiments the direction of the medium can also be opposite to the direction in the figure. The medium can be water or various oils, and the present embodiment takes water as an example for illustration. Figure 8

[0100] It should be noted that the driving state of the infusion pipeline 400 refers to the state of the infusion pipeline 400 under the driving of the power device, which can be understood as the output state of the power device that provides power for the medium in the infusion pipeline 400. For example, the infusion pipeline 400 is driven by a water pump, and the rotating speed of the water pump is 3000 r / min. Then the driving state of the infusion pipeline 400 can be that the rotating speed of the water pump is 3000 r / min.

[0101] As an example, the infusion pipeline 400 is driven by a water pump, and the set rotating speed of the water pump is 4000 r / min. The control unit 300 receives the detection signal and determines that the flow corresponding to the detection signal is 9 m 3 / s, and the current rotating speed of the water pump is 4000 r / min. The control unit 300 determines that the reference flow is 10 m 3 / s according to the rotating speed 4000 r / min. Since the flow corresponding to the detection signal is less than the reference flow, the control unit 300 determines that the water flow in the infusion pipeline 400 has boiled.

[0102] The controller 800 receives the detection signal transmitted by the flowmeter 220. The controller 800 compares the flow corresponding to the detection signal with the reference flow. When the flow is less than the reference flow, it is determined that the water has boiled. When the flow is equal to the reference flow, it is determined that the medium has not boiled. The principle and use of the flowmeter 220 are mature technologies, and the present embodiment will not be described here.

[0103] According to the heating device of the present application, the actual flow of the medium in the water pipeline 400 is detected by the flowmeter 220, which is compared with the flow under the non-boiling state, so as to effectively determine whether boiling occurs, and reduce the heating power in the boiling case, thereby avoiding continuous boiling of water and improving the safety of the heating device.

[0104] In some embodiments of the present application, the heating device can further include a first temperature sensor 230. The first temperature sensor 230 is arranged on the infusion pipeline 400 and is used to detect the first temperature of the medium before flowing through the heating body 100. The controller 800 is further used to generate a first control amount according to the detection signal and the reference current value, to determine a second control amount according to the first temperature and the target temperature, and to adjust the heating power of the heating body 100 according to the first control amount and the second control amount.

[0105] ​In some embodiments of the present application, the heating device further comprises a second temperature sensor 240, which is arranged on the infusion pipeline 400 and used to detect the second temperature of the medium after flowing through the heating body 100; the controller 800 is further used to generate a first control quantity according to the detection signal and the reference current value, determine a third control quantity according to the second temperature and the boiling point of the medium, and adjust the heating power of the heating body 100 according to the first control quantity and the third control quantity.

[0106] In some embodiments of the present application, the heating device further comprises a first temperature sensor 230 and a second temperature sensor 240; the first temperature sensor 230 is arranged on the infusion pipeline 400 and used to detect the first temperature of the medium before flowing through the heating body 100; the second temperature sensor 240 is arranged on the infusion pipeline 400 and used to detect the second temperature of the medium after flowing through the heating body 100; the controller 800 is further used to generate a first control quantity according to the detection signal and the reference current value, determine a second control quantity according to the first temperature and the target temperature, determine a third control quantity according to the second temperature and the boiling point of the medium, and adjust the heating power of the heating body 100 according to the first control quantity, the second control quantity and the third control quantity.

[0107] The related content of the first control quantity, the second control quantity and the third control quantity can refer to the foregoing embodiments, which will not be described here in detail. The heating device according to the embodiments of the present application adds the output temperature feedback and control loop and the fluid pump current feedback and control loop on the basis of the target water temperature control loop, limits the output temperature to the highest allowable output temperature or below, avoids the boiling phenomenon of the medium, and improves the safety of the heating device.

[0108] It should be noted that the description of the related structure of the water tank connecting mechanism in the present embodiment can refer to the description of the foregoing embodiments. In addition, the present embodiment can also include the structures mentioned in the foregoing embodiments but not mentioned in the present embodiment.

[0109] With reference to Figure 9 The embodiments of the present application also provide a control method of a heating device. The heating device is arranged on an infusion pipeline, and the control method can comprise the following steps:

[0110] S910: acquiring the flow rate of the medium in the infusion pipeline.

[0111] S920: reducing the heating power of the heating device when the flow rate is less than a reference flow rate, the reference flow rate being the flow rate of the medium at the current flow rate and in a non-boiling state.

[0112] The execution subject of the control method of the heating device can be a functional module or a functional entity in the heating device that can implement the control method, such as an MCU (Microcontroller Unit) and the like. Of course, the execution subject can also be another type of device having similar functions. The specific component structure of the heating device can refer to the foregoing embodiments, and the present embodiment takes the MCU as the execution subject for description.

[0113] The heating device in the present embodiment is mainly used for heating the flowing medium. In the heating process, bubbles are generated when the medium boils, and the bubbles can cause the flow to decrease. Therefore, whether the medium boils can be determined by using the flow of the medium, and then corresponding control is performed.

[0114] It should be noted that the flow of the medium in the infusion pipeline can be detected by using a detection device in an indirect or direct manner. For example, direct detection can use a flow meter to detect the flow of the medium in the infusion pipeline, and the MCU receives the signal transmitted by the flow meter to obtain the flow. Alternatively, a fluid pump is arranged in the infusion pipeline, and the fluid pump operates at a reference flow or speed. At different flows or speeds, the current of the fluid pump is different, so the current of the fluid pump can also be detected by a current detection unit to indirectly detect the flow of the medium in the infusion pipeline, and the MCU receives the signal transmitted by the current detection unit to obtain the flow.

[0115] It should be noted that the driving state of the infusion pipeline 400 refers to the state of the infusion pipeline 400 under the driving of the power equipment, which can be understood as the output state of the power equipment that provides power for the medium in the infusion pipeline 400. For example, the infusion pipeline 400 is driven by a water pump, and the speed of the water pump is 3000 r / min. The driving state of the infusion pipeline 400 can be that the speed of the water pump is 3000 r / min.

[0116] As an example, the infusion pipeline 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 corresponding to the detection signal is 9 m 3 / s, and the current speed of the water pump is 4000 r / min. The control unit 300 determines that the reference flow is 10 m 3 / s according to the speed of 4000 r / min. Since the flow corresponding to the detection signal is less than the reference flow, the control unit 300 determines that the water flow in the infusion pipeline 400 boils.

[0117] According to the heating device control method, the actual flow of the medium in the water delivery pipeline is detected, compared 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.

[0118] In some embodiments of the present application, obtaining the flow of the medium in the infusion pipeline can include: obtaining a current signal of a fluid pump driving the flow of the medium in the infusion pipeline; and determining the flow of the medium in the infusion pipeline according to the current signal.

[0119] In the present embodiment, a fluid pump is arranged in the infusion pipeline, and the flow of the medium in the infusion pipeline is indirectly detected by detecting the current of the fluid pump on the infusion pipeline. The fluid pump can be provided with a current acquisition and amplification circuit and an analog-to-digital converter and the like to detect the load current of the fluid pump and transmit the detected signal to the MCU.

[0120] In some embodiments of the present application, when the flow is less than the reference flow, 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 is less than the reference flow, and the heating power of the heating device is reduced, and the reference current value is the current value of the load current of the fluid pump at the current speed and in the non-boiling state of the medium.

[0121] The load current of the fluid pump refers to the actual working current of the fluid pump when dragging the load. The load of the fluid pump is the medium, so when the medium boils and the flow decreases, the load of the fluid pump decreases, and the corresponding load current also decreases. The present embodiment indirectly determines whether the water in the infusion pipeline boils by detecting the load current of the fluid pump, so that the boiling control of the water is more accurate.

[0122] According to the control method of the heating device, the actual load current value of the fluid pump is compared with the corresponding reference current value, so as to more accurately determine whether the medium in the infusion pipeline boils, so that the boiling control of the water is more accurate.

[0123] In some embodiments of the present application, obtaining the flow of the medium in the infusion pipeline includes: obtaining a flow signal of a flow meter detecting the flow of the medium in the infusion pipeline; and determining the flow of the medium in the infusion pipeline according to the flow signal.

[0124] The MCU receives a detection signal transmitted by the flowmeter. The control unit compares the flow corresponding to the detection signal with the reference flow. When the flow is less than the reference flow, it is determined that the water is boiling. When the flow is equal to the reference flow, it is determined that the medium is not boiling. The reference flow can be determined according to the foregoing. The principle and use of the flowmeter are mature technologies, and will not be described here.

[0125] In some embodiments of the present application, the control method further comprises: obtaining a first temperature of the medium before flowing through the heating device; generating a first control quantity according to the flow and the reference flow, determining a second control quantity according to the first temperature and the target temperature, and adjusting the heating power of the heating body according to the first control quantity and the second control quantity.

[0126] The first temperature can be detected by a temperature sensor. The temperature sensor can be arranged at the water inlet of the infusion pipeline. The temperature sensor can be an NTC (Negative Temperature Coefficient) thermal resistor, etc. The MCU is connected with the temperature sensor and receives the temperature signal fed back by the temperature sensor, and then obtains the first temperature of the medium before flowing through the heating device.

[0127] The target temperature refers to the temperature required to be reached by the medium under the heating action of the heating device. The target temperature can be input by the user, for example, if the user inputs 92℃, the target temperature is 92℃. Alternatively, the target temperature can also be automatically set by the heating program stored in the MCU, for example, the heating program determines the corresponding target temperature according to the local time, 80℃ at night and 90℃ during the day, etc. The setting of the target temperature can be set according to the application scene of the heating device, which is not limited in the present embodiment.

[0128] In some embodiments, generating the first control quantity according to the detection signal and the reference flow means generating the first control quantity according to the difference between the flow corresponding to the detection signal and the reference flow. When the water does not boil, the difference between the flow corresponding to the detection signal and the reference flow is zero, and the corresponding first control quantity is zero. When the water boils, the flow corresponding to the detection signal is less than the reference flow, and the corresponding first control quantity can be determined according to the difference between the two. The specific value can be set according to the requirement.

[0129] In some embodiments, determining the second control quantity according to the first temperature and the target temperature means generating the second control quantity according to the difference between the first temperature and the target temperature. When the first temperature is less than the target temperature, the second control quantity can be determined according to the difference between the two. The specific value can be set according to the requirement. When the first temperature is equal to the target temperature, the second control quantity can be zero.

[0130] In the embodiment, the control quantity is used to represent the adjustment amount of the heating power of the heating body, which can be in the form of an electrical signal. The first control quantity represents the adjustment amount of the heating power of the heating body determined according to whether boiling occurs, and the second control quantity represents the adjustment amount of the heating power of the heating body determined according to the target temperature required by the medium. The MCU superimposes the first control quantity and the second control quantity, and controls the heating power of the heating body according to the superimposed control quantity.

[0131] According to the heating device, the first control quantity and the second control quantity are superimposed, and the heating power of the heating body is controlled according to the superimposed control quantity, so that the medium is heated to the target temperature while avoiding boiling of the medium.

[0132] In some embodiments of the present application, the control method further comprises: obtaining a second temperature of the medium after flowing through the heating device; generating a first control quantity according to the flow rate and the reference flow rate, determining a third control quantity according to the second temperature and the boiling point of the medium, and adjusting the heating power of the heating device according to the first control quantity and the third control quantity.

[0133] The second temperature can be detected by a temperature sensor, which can be arranged at the water outlet of the infusion pipeline, and can be an NTC (Negative Temperature Coefficient) thermal resistance, etc. The MCU is connected with the temperature sensor and receives the temperature signal fed back by the temperature sensor, and then obtains the second temperature of the medium before flowing through the heating device.

[0134] The second temperature represents the output temperature of the medium flowing out of the heating body. If the second temperature is greater than or equal to the boiling point, it means that the medium has boiled. In order to further avoid boiling of the medium, the highest allowable output temperature can be set according to the boiling point, and the heating power of the heating body is reduced when the second temperature reaches the highest allowable output temperature. The highest allowable output temperature and the boiling point can be set with a margin, i.e. the highest allowable output temperature = boiling point - margin, and the margin can be 1-2℃.

[0135] According to the heating device, the first control quantity and the third control quantity are superimposed, and the heating power of the heating body is controlled according to the superimposed control quantity, so that the output temperature of the medium flowing out of the heating body is controlled below the highest allowable output temperature, thereby effectively avoiding boiling of the medium.

[0136] In some embodiments of the present application, the control method further comprises: obtaining a first temperature of the medium before flowing through the heating device and a second temperature of the medium after flowing through the heating device; generating a first control quantity according to the flow and the reference flow, determining a second control quantity according to the first temperature and the target temperature, determining a third control quantity according to the second temperature and the boiling point of the medium, and adjusting the heating power of the heating device according to the first control quantity, the second control quantity and the third control quantity.

[0137] The first temperature and the second temperature can be obtained in the manner described in the foregoing embodiments, and the first control quantity, the second control quantity and the third control quantity can be determined in the manner described in the foregoing embodiments.

[0138] With reference to Figure 5 In the present embodiment, the control strategy of the heating body is to superimpose the first control quantity, the second control quantity and the third control quantity, and to control the heating power of the heating body by using the superimposed control quantity. Figure 5 The reference current in the formula is the current of the fluid pump at the current rotating speed and when the medium is in a non-boiling state; the load current is the actual current of the fluid pump, which is obtained by the current detection unit; the first temperature is the temperature of the medium before flowing through the heating body, which is obtained by the first temperature detection unit; the second temperature is the temperature of the medium after flowing through the heating body, which is obtained by the second temperature detection unit; the target temperature and the maximum allowable output temperature are described above.

[0139] According to the heating device of the present application, the output temperature feedback and control loop and the fluid pump current feedback and control loop are added on the basis of the target water temperature control loop, so as to limit the output temperature to be below the maximum allowable output temperature, thereby avoiding the boiling phenomenon of the medium and improving the safety of the heating device.

[0140] In some embodiments of the present application, the control method further comprises: obtaining an air pressure signal of the air pressure sensor; and determining the boiling point of the medium according to the air pressure signal.

[0141] The MCU is electrically connected with the air pressure sensor, and the MCU has an internal storage of the correspondence between the air pressure and the boiling point. The MCU determines the corresponding boiling point according to the air pressure corresponding to the air pressure signal and the correspondence between the air pressure and the boiling point. The correspondence between the altitude and the boiling point is known, and will not be described herein.

[0142] In some embodiments of the present application, the control method further comprises: obtaining an altitude signal of the altimeter; and determining the boiling point of the medium according to the altitude signal.

[0143] The MCU is electrically connected with the altimeter, and the MCU internally stores a corresponding relationship between the altitude and the boiling point. The MCU 310 determines the corresponding boiling point according to the altitude corresponding to the height signal and the corresponding relationship between the altitude and the boiling point. The corresponding relationship between the altitude and the boiling point is known, and thus is not described herein again.

[0144] The application also 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 according to the foregoing embodiments.

[0145] The computer program, when executed by the processor, implements each process of the control method of the heating device according to the foregoing embodiments, and achieves the same technical effects. To avoid repetition, details are not described herein again.

[0146] With reference to Figures 10-14 The application also provides a cooking device. The cooking device can include the heating device according to the foregoing embodiments. The cooking device includes a body 1000, a docking pipeline assembly 1100, a driving pump assembly 1200, a heating device 1300, and an external liquid container 1400.

[0147] The body 1000 includes a base 1010 and a shell 1020, and the base 1010 and the shell 1020 enclose an installation cavity 1030. The docking pipeline assembly 1100 includes a water inlet 1110, the body 1000 has an external side 1040, the water inlet 1110 is located on the external side 1040, the external side 1040 is configured to cooperate with the 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 driving pump assembly 1200 includes a fluid pump 500, the fluid pump 500 communicates with the water inlet 1110 and is configured to establish a liquid flow channel with the external liquid container 1400. The heating device 1300 is configured to heat liquid introduced into a cooking main machine 1500. The fluid pump 500 and the heating device 1300 are located in the installation cavity 1030, and in a vertical direction of the cooking main machine 1500, the fluid pump 500 and the heating device 1300 are located above the water inlet 1110, so that liquid in the fluid pump 500 and the heating device 1300 can flow to the water inlet 1110 under the action of gravity. The external liquid container 1400 has the second docking port 1410, the external liquid container 1400 can be placed side by side on the external side 1040 of the body 1000, and the water inlet 1110 of the cooking main machine 1500 can be detachably and sealingly communicated with the second docking port 1410.

[0148] When the cooking host 1500 is working, the liquid in the external liquid container 1400 is sequentially pumped into the body 1000 through the second connecting interface 1410 and the water inlet 1110 by driving the pump assembly 1200, and the liquid introduced into the cooking host 1500 is heated by the heating device 1300, and then the heated liquid is sequentially discharged to the external liquid container 1400 through the water inlet 1110 and the second connecting interface 1410, so as to heat the food in the external liquid container 1400. During the heating process, the liquid is continuously circulated between the cooking host 1500 and the external liquid container 1400 to heat the liquid in the external liquid container 1400 by the cooking host 1500. In some embodiments, the cooking device is a low-temperature slow-cooking machine, the maximum temperature of the liquid in the external liquid container 1400 does not exceed 1000 degrees Celsius, and the liquid remains in a non-boiling state in the cooking device to ensure the normal operation of the cooking device and the cooking effect of low-temperature slow-cooking of food.

[0149] The cooking host 1500 further comprises a circuit board assembly 1600, which is arranged in the mounting cavity 1030, and the air pressure sensor 250 is arranged on the circuit board assembly 1600.

[0150] The terms "first", "second", and the like in the description and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means that the front and rear associated objects are in an "or" relationship.

[0151] In the description of the present application, the meaning of "a plurality of" is two or more.

[0152] Other configurations of … according to embodiments of the present application, such as … and …, and operations are known to those skilled in the art, and will not be described in detail here.

[0153] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", 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 the present description, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0154] While the embodiments of the application have been shown and described, it is to be understood that the embodiments can be varied, modified, substituted and changed by those skilled in the art without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A heating device, characterized in that, The heating device comprises: a heating body arranged on the infusion pipeline and used for heating the medium in the infusion pipeline; a detection unit arranged on the infusion pipeline and used for detecting the flow rate of the medium and generating a detection signal according to the detection result; a control unit electrically connected with the heating body and the detection unit respectively, used for receiving the detection signal, and controlling the heating body to reduce the heating power when the flow rate corresponding to the detection signal is less than a reference flow rate, the reference flow rate being the flow rate of the medium in a non-boiling state when the infusion pipeline is in a current driving state; the detection unit further comprises a first temperature detection unit and a second temperature detection unit; the first temperature detection unit is arranged on the infusion pipeline and used for detecting a first temperature of the medium before the medium flows through the heating body; the second temperature detection unit is arranged on the infusion pipeline and used for detecting a second temperature of the medium after the medium flows through the heating body; the control unit is further used for generating a first control quantity according to the detection signal and the reference flow rate, determining a second control quantity according to the first temperature and a target temperature, determining a third control quantity according to the second temperature and a boiling point of the medium, and adjusting the heating power of the heating body according to the first control quantity, the second control quantity and the third control quantity.

2. The heating device of claim 1, wherein The infusion pipeline is provided with a fluid pump, and the detection unit comprises a current detection unit; the fluid pump is used for driving the medium in the infusion pipeline to flow; the current detection unit is electrically connected with the fluid pump, used for acquiring a load current of the fluid pump, detecting the flow rate of the medium, and generating the detection signal according to a current value of the load current.

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

4. The heating device of claim 2, wherein The current detection unit comprises: a collection and amplification unit electrically connected with the fluid pump, used for collecting the load current of the fluid pump and amplifying the load current to obtain an amplified current; an analog-to-digital conversion unit electrically connected with the collection and amplification unit, used for digitally sampling the amplified current and generating the detection signal according to a sampling value.

5. The heating device of claim 1, wherein, The detection unit comprises a flow meter; the flow meter is arranged on the infusion pipeline, used for measuring the flow rate of the medium and generating the detection signal according to the flow rate.

6. The heating device according to any one of claims 1-5, characterized in that, The detection unit further comprises an air pressure sensor; the air pressure sensor is electrically connected with the control unit, used for detecting an air pressure of an environment where the heating device is located and generating an air pressure signal according to the air pressure; the control unit is further used for determining the boiling point of the medium according to the air pressure signal.

7. The heating device according to any one of claims 1-5, characterized in that, The detection unit further comprises an altimeter; the altimeter is electrically connected with the control unit, used for detecting an altitude of an environment where the heating device is located and generating an altitude signal according to the altitude; the control unit is further used for determining the boiling point of the medium according to the altitude signal.

8. A heating apparatus, characterized by comprises: a water tank; The heating device according to any one of claims 1-7, which is connected with the water tank and forms a liquid delivery pipeline through which water in the water tank circulates, and is used to heat the water flow in the liquid delivery pipeline.

9. A control method of a heating device, applied to the heating device according to any one of claims 1-7, characterized in that, The heating device is arranged on the liquid delivery pipeline, and the control method comprises: acquiring the flow of the medium in the liquid delivery pipeline; when the flow is less than a reference flow, reducing the heating power of the heating device, the reference flow being the flow of the medium at a current flow rate and in a non-boiling state. 10.A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by a processor to implement the control method of the heating device according to claim 9.

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