Low-power-consumption self-suction thermocouple electromagnetic valve, control system and intelligent stove

Abstract

The embodiment of the invention provides a low-power-consumption self-suction thermocouple electromagnetic valve, a control system and an intelligent stove, and relates to the field of stoves. Comprising a shell, a valve seat, a sealing gasket, a movable iron core and a static iron core, the valve seat is fixedly connected to the bottom of the shell, and the sealing gasket is arranged above the shell; the lower end of the movable iron core movably penetrates into the shell, and the upper end of the movable iron core is connected with the sealing gasket and sleeved with a spring. The spring is propped between the sealing gasket and the shell; the static iron core is fixed in the shell and located below the movable iron core. An inner coil is wound outside the static iron core; an outer coil is wound on the inner wall of the shell and corresponds to the outer sides of the movable iron core and the static iron core, and a preset distance is formed between the outer coil and the inner coil. According to the invention, extremely low power consumption and automatic firepower adjustment of flameout safety protection of the whole system of the intelligent stove can be realized, and the requirements of safety and low power consumption are fully compatible.

Description

Technical Field

[0001] The present invention relates to the field of cooking stoves, and particularly to a low-power self-priming thermocouple solenoid valve, a control system and an intelligent stove. Background Art

[0002] Safety protection for the flameout of cooking stoves has always been the first point of concern, to avoid gas leakage accidents when the gas stove is not in use or suddenly flames out during use.

[0003] Based on the requirements of safety combined with intelligence and low power consumption, many manufacturers adopt a bistable valve combination design to achieve firepower adjustment and the low-power requirement of only consuming energy during adjustment. However, the above design has problems such as when the battery power is insufficient, the connection of the reverse current circuit is loose, the circuit is abnormal, and the solenoid valve coil fails (such as short circuit or open circuit, etc.), and its safety function cannot be guaranteed. In addition, in recent years, the functions of rapid ignition and timed flameout have emerged one after another. Based on the double-coil thermocouple valve cooperating with the cooking stove controller, when pressing to ignite, an output current is provided to maintain the opening of the valve for a few seconds before ignition. After the cooking timing function ends, it is closed through reverse current. However, the existing double-coil solenoid valve has the problem that it cannot turn off the fire when the time is up due to insufficient power. And currently, for rapid ignition cooking stoves, it is still necessary to first press the valve stem (knob) by hand to complete ignition. Due to the existence of the knob on the cooking stove, cleaning the stove top has always been a pain point in the industry, and the mechanical knob operation method further limits the intelligent level of the cooking stove.

[0004] After retrieval, the patent CN219994523U provides a self-priming double-needle solenoid valve for cooking stove flameout protection. It uses a single energized coil design to achieve automatic suction without manual auxiliary suction, and can achieve canceling the hand-pressing valve stem (knob). A large current is used at the start of suction, but a small current needs to be continuously supplied during the cooking process of maintaining suction, and there is still a relatively large power consumption problem. Currently, there is no relevant literature to solve the solution of the compatibility of low power consumption, intelligent firepower adjustment and safety. Summary of the Invention

[0005] In view of the above problems, embodiments of the present invention are proposed to provide a low-power self-priming thermocouple solenoid valve, a control system and an intelligent stove that overcome the above problems or at least partially solve the above problems.

[0006] A low-power self-priming thermocouple solenoid valve includes: A housing, a valve seat, a gasket, a moving iron core and a static iron core. The valve seat is fixedly connected to the bottom of the housing, and the gasket is arranged above the housing; The lower end of the moving iron core movably penetrates inside the housing, and the upper end of the moving iron core is connected to the gasket and sleeved with a spring; the spring abuts between the gasket and the housing; The static iron core is fixed inside the housing and is located below the moving iron core; an inner coil is wound around the outside of the static iron core; An outer coil is wound around the inner wall of the housing. The outer coil corresponds to the outside of the moving iron core and the static iron core and has a preset distance from the inner coil.

[0007] Preferably, a flange bracket is sleeved on one end of the valve seat away from the housing; the negative pin feet of the inner coil and the outer coil are connected to the flange bracket, and the positive pin feet of the inner coil and the outer coil pass through the bottom of the valve seat.

[0008] Preferably, a fixed armature is provided at one end of the moving iron core close to the static iron core.

[0009] Preferably, a fixed boss is provided inside the valve seat, and the static iron core is supported on the fixed boss.

[0010] Preferably, a plastic sealing member is provided at the bottom of the fixed boss, and two pins are inserted through the plastic sealing member; the positive pin feet of the inner coil and the outer coil are respectively connected to the two pins in a one-to-one correspondence.

[0011] A control system includes the solenoid valve as described above, as well as a main control module, a total self-priming valve, a motor gas valve, a bistable valve, a thermocouple and an igniter. The igniter, the total self-priming valve, the motor gas valve, the bistable valve and the solenoid valve are respectively electrically connected to the main control module; The igniter is used to trigger the opening of the solenoid valve through the main control module; The total self-priming valve is used to control the on-off of the total intake gas path; The motor gas valve is used to control the gas volume passing through the gas path; The bistable valve is used to control the opening and closing of the outer ring fire; The thermocouple is electrically connected to the inner coil of the solenoid valve and is used to detect the flame temperature and convert the temperature signal into an electrical signal and transmit it to the solenoid valve to maintain the self-priming opening of the solenoid valve; During operation, the total self-priming valve, the solenoid valve, the motor gas valve and the bistable valve are energized to open; Among them, when the outer coil and the inner coil of the solenoid valve are energized for t 1 time, the main control module controls the current of the outer coil to drop to 0 and remain for t 2 time, then controls the current of the inner coil to decrease to a preset value and remain for t 3 time, and then controls the current of the inner coil to drop to 0. At this time, the solenoid valve is maintained open by the power generation of the thermocouple.

[0012] Preferably, a timer is further included, and the timer is electrically connected to the main control module; The timer is used to record the energization time of the outer coil and the inner coil respectively, so as to realize the energization control of the outer coil and the inner coil respectively.

[0013] Preferably, it further includes an operation communication module and a temperature sensor detection module, and the operation communication module and the temperature sensor detection module are respectively electrically connected to the main control module; The operation communication module is used for human-computer interaction to realize function selection; The temperature sensor detection module is used to detect the temperature of the bottom of the pot, and transmit the temperature data to the main control module for comparison with the set target temperature, so as to realize the control of temperature, firepower and cooking time.

[0014] Preferably, it further includes a timing reminder module and a power reminder module, and the timing reminder module and the power reminder module are respectively electrically connected to the main control module; The timing reminder module is used to control the closing of the total self-priming valve through the main control module after the timing condition is met; The power reminder module is used to control the closing of some function menus of the operation communication module through the main control module when the power is insufficient.

[0015] An intelligent stove includes a stove body and the control system, and the control system is arranged inside the stove body.

[0016] The present application specifically includes the following advantages: In the embodiment of the present application, the solenoid valve is provided with an outer coil wound around the inner wall of the housing, and the outer coil corresponds to the outside of the moving iron core and the static iron core, so that the magnetic field intensity generated after the outer coil is energized is relatively large, which can overcome the elastic force of the spring and realize the rapid attraction of the moving iron core and the static iron core; by winding an inner coil outside the static iron core, the inner coil is energized to generate a magnetic field, which cooperates with the outer coil to realize the stable attraction of the moving iron core and the static iron core; furthermore, it is possible to realize the ignition without the need to assist the attraction by manually pressing the valve rod (knob), and it is possible to realize the easy cleaning of the stove top and the full-touch screen intelligent control. The design of the inner and outer coils can make the current of the outer coil be disconnected after being energized for a certain time. The inner coil uses a small current to offset the interaction between the magnetic fields in a very short time after the outer coil is powered off, and finally the current of the inner coil is turned off, and the solenoid valve is maintained open during the cooking process by thermoelectric power generation, realizing extremely low power consumption for flameout safety protection; and a certain preset interval distance is designed between the inner coil and the outer coil, which can enable the coupling design between the two magnetic fields in a very short time, ensuring the reliability of the suction valve during the stable attraction process, and also ensuring that the initial energization time of the inner and outer coils is short, comprehensively reducing the overall power consumption of the solenoid valve.

[0017] In an embodiment of the present application, the control system of the solenoid valve is configured with a main control module, a total self-priming valve, a motor gas valve, a bistable valve, a thermocouple, and an igniter. The total self-priming valve serves as the second layer of protection for the solenoid valve's flameout protection and can close the total gas path when the power suddenly runs out. The motor gas valve controls the movement of the valve body diaphragm by driving a micro stepping motor to control the gas volume passing through the gas path. In combination with the bistable valve, by controlling the opening and closing of the outer ring fire, the inner ring fire can continue to burn, thereby achieving stepless adjustment of the firepower of a single inner ring fire, and at the same time achieving stepless adjustment of the fire of both the inner and outer rings when the outer ring fire is turned on. And by controlling the current changes in the outer and inner coils of the solenoid valve, a large current is used at the beginning of suction and startup, and a small current is used during the stable suction process to offset the interaction between the magnetic fields in a very short time after the outer coil is powered off. Then, the solenoid valve is maintained in the open state during the cooking process by the power generation of the thermocouple, achieving extremely low power consumption for flameout safety protection, completely avoiding the deficiencies in flameout safety protection or the problem of being unable to close the valve when the timing is up in the existing solutions in cases such as insufficient battery power, loose connection of the reverse current circuit, abnormal circuit, and solenoid valve coil failure, and fully compatible with the requirements of safety and low power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the present application, the drawings required for the description of the present application will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 is a schematic structural diagram of the low-power self-priming thermocouple solenoid valve of the present invention; Figure 2 is a block diagram of the control system of the low-power self-priming thermocouple solenoid valve of the present invention; Figure 3 is a gas path diagram of the control system of the low-power self-priming thermocouple solenoid valve of the present invention; Figure 4 is a schematic diagram of the interface of the operation communication module of the present invention; Figure 5 is a control flowchart of the control system of the present invention; Reference numerals: 1, outer shell; 2, valve seat; 3, sealing gasket; 4, moving iron core; 5, static iron core; 6, spring; 7, inner coil; 8, outer coil; 9, flange bracket; 10, negative electrode pin; 11, positive electrode pin; 12, fixed armature; 13, fixed boss; 14, plastic seal; 15, pin; 16, external sealing ring; 17, internal sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To make the objectives, features, and advantages of this application more obvious and understandable, the following provides a more detailed description of this application in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are part of this application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts belong to the scope protected by this application. Referring to Figures 1 - 5 , a schematic structural diagram of a low-power self-priming thermocouple solenoid valve of the present invention is shown, which may specifically include: A housing 1, a valve seat 2, a gasket 3, a moving iron core 4, and a stationary iron core 5. The valve seat 2 is fixedly connected to the bottom of the housing 1, and the gasket 3 is disposed above the housing 1; The lower end of the moving iron core 4 movably penetrates into the interior of the housing 1. The upper end of the moving iron core 4 is connected to the gasket 3 and is sleeved with a spring 6; the spring 6 abuts between the gasket 3 and the housing 1; The stationary iron core 5 is fixed inside the housing 1 and is located below the moving iron core 4; an inner coil 7 is wound around the outside of the stationary iron core 5; An outer coil 8 is wound around the inner wall of the housing 1. The outer coil 8 corresponds to the outside of the moving iron core 4 and the stationary iron core 5 and has a preset distance from the inner coil 7.

[0021] In the embodiments of this application, by winding an outer coil 8 around the inner wall of the housing 1 and the outer coil 8 corresponding to the outside of the moving iron core 4 and the stationary iron core 5, the magnetic field intensity generated after the outer coil 8 is energized is relatively large, which can overcome the elastic force of the spring 6 and realize the rapid attraction of the moving iron core 4 and the stationary iron core 5; by winding an inner coil 7 around the outside of the stationary iron core 5, the inner coil 7 is energized to generate a magnetic field, which cooperates with the outer coil 8 to realize the stable attraction of the moving iron core 4 and the stationary iron core 5; furthermore, it is possible to realize the ignition without the need to assist the attraction by manually pressing the valve rod (knob), and it is possible to achieve easy cleaning of the stove top and full-touch intelligent control. The design of the inner and outer coils 8 can make the two cut off the current of the outer coil 8 after being energized for a certain period of time. The inner coil 7 uses a small current to offset the interaction between the magnetic fields in an extremely short time after the outer coil 8 is powered off. Finally, the current of the inner coil 7 is turned off, and the solenoid valve is maintained in the open state during the cooking process by thermocouple power generation, realizing extremely low power consumption for flameout safety protection; and a certain preset interval distance is designed between the inner coil 7 and the outer coil 8, which can enable the coupling design between the two magnetic fields in an extremely short time, ensuring the reliability of the valve suction during the stable attraction process, and also ensuring that the initial energization of the inner and outer coils 8 can be shorter, comprehensively reducing the overall power consumption of the solenoid valve.

[0022] It can be understood that in the initial state when the solenoid valve is opened, a large current is simultaneously applied to the outer coil 8 and the inner coil 7, causing the moving iron core 4 and the static iron core 5 to quickly attract and open the valve. After a short attraction, the outer coil 8 is powered off. At this time, a small current is applied to the inner coil 7, and the combined effect of the small current applied to the inner coil 7 and the power generation of the thermocouple under the flame combustion maintains the coil of the solenoid valve during this stage of the cooking process. At this time, the cooking appliance is in the stage of just igniting and burning. The power generation of the thermocouple under the flame combustion is relatively weak. It takes about 3 - 4 seconds of delay before the power generation of the thermocouple under the flame combustion becomes relatively stable and can be sufficient to maintain the opening of the solenoid valve. That is, the inner coil 7 uses a small current to maintain the attracted state. After a certain period of time (i.e., the 3 - 4 seconds of delay), the current applied to the inner coil 7 can be controlled to drop to 0, which means the current applied to the inner coil 7 by the controller is turned off. Subsequently, it is completely powered by the thermocouple of the cooking appliance flame. And during the cooking process, there must be a flame. Plus, the thermocouple is electrically connected to the inner coil 7 of the solenoid valve, used to detect the flame temperature and convert the temperature signal into an electrical signal and transmit it to the inner coil of the solenoid valve (the characteristics of the thermocouple), which can provide the small current required to maintain the self - attraction of the solenoid valve for the inner coil 7 to continue to maintain the self - attraction opening of the solenoid valve. Once an accidental flameout occurs (such as no gas, blown out by the wind, coil breakage, etc.), the thermocouple loses the heat source and stops generating electricity. Since there is no power generation to maintain the valve opening, the solenoid valve loses the maintaining current, and the spring resets to close the valve, and the solenoid valve automatically closes to achieve flameout protection.

[0023] Next, a low - power self - attracting thermocouple solenoid valve in this exemplary embodiment will be further described.

[0024] In the embodiment of the present application, referring to Figure 1 , the above - mentioned valve seat 2 is fixedly connected to the bottom of the outer shell 1. The outer shell 1 is a metal outer shell 1 for installing and fixing components. The valve seat 2 is made of copper, and an external sealing ring 16 is embedded on its outer side, which is used to improve the gas tightness when the solenoid valve is installed with the gas pipe. The above - mentioned gasket 3 is arranged above the outer shell 1 for gas - path sealing. The lower end of the moving iron core 4 movably penetrates into the interior of the outer shell 1 and can move up and down to achieve attraction with the static iron core 5. The upper end of the moving iron core 4 is connected to the gasket 3 and is sleeved with a spring 6. The spring 6 abuts between the gasket 3 and the outer shell 1. The spring 6 provides a valve - closing force to ensure sealing, and when the thermocouple loses power during flameout, it provides a reset elastic force for the gasket 3. The moving iron core 4 is generally made of DT4C pure iron for electrical engineering, which can be quickly magnetized to drive the gasket 3 to move.

[0025] The above-mentioned static iron core 5 is fixed inside the housing 1 and is located below the moving iron core 4. Specifically, a fixed boss 13 is provided inside the valve seat 2, and the static iron core 5 is supported on the fixed boss 13, with a certain distance from the moving iron core 4, so as to keep the gas disconnected when the solenoid valve is closed. An outer coil 8 is wound around the inner wall of the housing 1, and the outer coil 8 corresponds to the outside of the moving iron core 4 and the static iron core 5, that is, the outer coil 8 covers the outside of the moving iron core 4 and the static iron core 5. When energized, it can generate a large magnetic field and a strong magnetic force, and then can overcome the elastic force of the spring 6, so that the moving iron core 4 and the static iron core 5 are quickly attracted together, thereby pulling the sealing gasket 3 downward.

[0026] An inner coil 7 is wound around the outside of the above-mentioned static iron core 5. When energized, the static iron core 5 is magnetized. There is a preset distance between the inner coil 7 and the outer coil 8, and this preset distance is relatively small, so that the inner coil 7 can use a small current to offset the interaction between the magnetic fields in an extremely short time after the outer coil 8 is powered off during the stable attraction process. At the same time, as a coil for thermocouple power generation to maintain the force of the solenoid valve during the cooking process, the overall low power consumption of flameout safety protection is realized.

[0027] Specifically, in the first step, in the initial state when the solenoid valve is opened, the outer coil 8 and the inner coil 7 are simultaneously energized with a large current (about 800 mA), so that the moving iron core 4 and the static iron core 5 are quickly attracted together. In the second step, after maintaining stable attraction for a certain time, the current of the outer coil 8 is disconnected. At this time, the inner coil 7 uses a small current to offset the interaction between the magnetic fields in an extremely short time after the outer coil 8 is powered off (about 100 mA), and the current of the inner coil 7 can be turned off after a certain time. In the third step, then rely on thermocouple power generation to maintain the opening of the solenoid valve during the cooking process, and the energy of the battery (0 mA) is not required in this process. Through the power consumption of about t1 + t2 = 0.8 seconds in the first and second steps and the non-power-consuming design in the third step, the extremely low power consumption with flameout safety protection is finally realized. That is, once an accidental flameout occurs (such as no gas, blown out by the wind, etc.), the thermocouple cannot detect the flame and the potential drops to zero, and the solenoid valve cannot be maintained open. Therefore, the safety valve can be closed safely without relying on electronic control. Compared with the existing intelligent cooker scheme that relies on reverse large current to close the valve, the deficiencies of the existing scheme in the case of insufficient battery power, loose connection of the reverse current circuit, abnormal circuit, solenoid valve coil failure, etc. for flameout safety protection or the problem of unable to close the valve when the timing arrives are completely avoided, fully compatible with the requirements of safety and low power consumption, and improving its safety.

[0028] As an example, a flange bracket 9 is sleeved on one end of the above-mentioned valve seat 2 away from the housing 1; the negative pin 10 of the inner coil 7 and the outer coil 8 is connected to the flange bracket 9, and the positive pin 11 of the inner coil 7 and the outer coil 8 passes through the bottom of the valve seat 2. The above-mentioned flange bracket 9 is used for the fixed support of the valve body and at the same time serves as the negative electrode of the two coils.

[0029] As an example, a fixed armature 12 is provided at one end of the moving iron core 4 close to the static iron core 5. The fixed armature 12 is magnetized together with the moving iron core 4 and serves as the moving bearing structure of the moving iron core 4. At the same time, it avoids the complete contact between the strong magnets of the moving and static iron cores 5, preventing the situation where the thermocouple cannot close the valve after losing power due to residual magnetism, and further enhancing the safety of the solenoid valve.

[0030] As an example, a plastic sealing member 14 is provided at the bottom of the above-mentioned fixed boss 13. Two pins 15 are inserted through the plastic sealing member 14; the positive pins 11 of the inner coil 7 and the outer coil 8 are respectively connected to the two pins 15 in one-to-one correspondence. This realizes the connection between the inner coil 7 and the outer coil 8 and the control system, and is used to output a large current to the outer coil 8 and a small current to the inner coil 7 by the control system.

[0031] Furthermore, an internal sealing ring 17 is provided between the above-mentioned pin 15 and the plastic sealing member 14 to prevent air leakage between the inside and outside of the valve caused by the connection of the coil pins, and improve the sealing performance of the valve seat 2.

[0032] Referring to Figures 2 - 5 , the embodiment of the present application also provides a control system, including the above-mentioned solenoid valve, as well as a main control module, a total self-priming valve, a motor gas valve, a bistable valve, a thermocouple, and an igniter. The igniter, the total self-priming valve, the motor gas valve, the bistable valve, and the solenoid valve are respectively electrically connected to the main control module. The igniter is used to trigger the opening of the solenoid valve through the main control module. The total self-priming valve is used to control the on-off of the total intake gas path and serves as the second safety protection barrier in addition to the flameout protection of the solenoid valve. It mainly deals with the special situation where the valve cannot be closed in the extreme failure cases where low-power-consuming components such as the motor gas valve and the bistable valve need to be energized to operate and close the valve when the battery power suddenly runs out. Since the low-power self-priming thermocouple solenoid valve does not consume electricity during cooking and is completely maintained by the thermocouple generating electricity from its flame combustion, the total gas path self-priming valve cannot maintain the open state in the extreme case of sudden power shortage, thus quickly realizing the safe closing of the total gas path.

[0033] The above-mentioned motor gas valve is used to control the gas volume passing through the gas path. Specifically, the control system drives the movement of the valve body diaphragm by controlling the operation of the micro stepping motor, thereby controlling the gas volume passing through the gas path. The above-mentioned bistable valve is used to control the opening and closing of the outer ring fire. By controlling the opening and closing of the outer ring fire, the inner ring fire can continue to burn, thereby realizing stepless adjustment of the firepower of the single inner ring fire. At the same time, stepless adjustment of the firepower of both the inner and outer ring fires when the outer ring fire is opened can be achieved. It should be noted that the core of the motor gas valve is the micro stepping motor, which only consumes electricity when the firepower needs to be adjusted, and does not consume electricity during the remaining maintenance process. The working principle of the bistable valve is that it opens when a positive voltage is applied and closes when a negative voltage is applied. The state of the valve changes by switching between positive and negative voltages, that is, it only consumes electricity when the state changes, that is, when positive and negative voltages are applied, and does not consume energy at other times. Therefore, the low-power motor gas valve and the bistable valve system of the outer ring fire in this application only consume electrical energy for stepless firepower adjustment when the firepower needs to change, and do not consume electrical energy during the remaining cooking time, thereby realizing low power consumption and automatic firepower adjustment of the overall intelligent stove system.

[0034] The above-mentioned thermocouple is electrically connected to the inner coil 7 of the solenoid valve, and is used to detect the flame temperature and convert the temperature signal into an electrical signal to be transmitted to the solenoid valve to maintain the self-suction opening of the solenoid valve.

[0035] Specifically, during operation, the total self-suction valve, the solenoid valve, the motor gas valve, and the bistable valve are powered on and opened; among them, when the outer coil 8 and the inner coil 7 of the solenoid valve are powered on for t 1 time, the main control module controls the current of the outer coil 8 to drop to 0 and maintain it for t 2 time, then controls the current of the inner coil 7 to decrease to a preset value and maintain it for t 3 time, and then controls the current of the inner coil 7 to drop to 0. At this time, the solenoid valve is maintained open by the power generation of the thermocouple.

[0036] It should be noted that generally, a cooking stove is provided with two burners, which are divided into two gas paths. Therefore, a control system generally controls the left and right solenoid valves, the left and right motor gas valves, and the bistable valve. One total self-suction valve is set to control the total on-off of the two gas paths, as shown in Figure 2 and Figure 3 .

[0037] As an example, the above-mentioned control system further includes a timer, which is electrically connected to the main control module; the timer is used to record the power-on time of the outer coil 8 and the inner coil 7 respectively, so as to realize the power-on control of the outer coil 8 and the inner coil 7 respectively. That is, it records t 1 , t 2 , t 3 three time stages to realize the power-on and power-off of the inner and outer coils 8 and the adjustment of the current magnitude, and further realize the stable attraction of the moving iron core 4 and the static iron core 5.

[0038] As an example, the above also includes an operation communication module and a temperature sensor detection module, which are electrically connected to the main control module respectively; the operation communication module is used for human-computer interaction to realize function selection; the operation communication module is controlled by touch, and it is provided with a plurality of function keys for selecting the corresponding intelligent cooking menu. The system realizes automatic adjustment of firepower and anti-dry burning function according to the temperature and time curve set in the corresponding menu in combination with the stove temperature sensor, such as Figure 4 .

[0039] The temperature sensor detection module is used to detect the temperature of the bottom of the pot and transmit the temperature data to the main control module for comparison with the set target temperature. According to the difference between the actual temperature detected and the target temperature, the opening of the motor gas valve is adjusted, and the new temperature is adjusted according to the change of the target temperature to achieve control of temperature, firepower and cooking time.

[0040] As an example, the above also includes a timing reminder module and a power reminder module, which are electrically connected to the main control module respectively; the timing reminder module is used to control the closing of the main self-priming valve through the main control module after the timing conditions are met; the timed shutdown can eliminate the problem that the existing solution is short of power, resulting in the valve being unable to operate and the fire being unable to be shut down when the timing time is reached.

[0041] The power reminder module is used to control the operation of the communication module to close some function menus when the power is low. Specifically, when the battery power is low (for example, less than 20% of the total power), the control system limits some smart recipe functions and allows the use of conventional cooking modes and fixed firepower, avoiding the disadvantage that users cannot use the device due to failure to replace the battery in time, thereby improving the user experience.

[0042] It should be noted that in the present system, since each module is independently connected to the main control module, even if the temperature acquisition module (i.e., the temperature sampling circuit and the stove temperature sensor on the main control module) is removed, non-intelligent temperature control by touch button adjustment of the fire power can also be realized, which has high flexibility and realizes a flexible and customizable temperature acquisition module.

[0043] like Figure 5 , the control process of this application control system is as follows: The control system is powered on. When the battery power is greater than or equal to 20%, the corresponding intelligent recipe is selected or the timing function is turned on. The main self-priming valve is powered on and the outer coil 8 of the solenoid valve is powered on. 外 , the inner coil 7 is energized I 内1 , the motor gas valve is half open, and the bistable valve is open. The timer detects t 1 ≥a 1 , the current of the outer coil 8 is reduced to zero to reduce power consumption; the timer detects t 2 ≥a 2, the current of the inner coil 7 is reduced from I 内1 to I 内2 , further reducing the power consumption; when the timer detects that t 3 ≥a 3 , the current of the inner coil 7 is reduced to zero, so that the solenoid valve enters zero power consumption.

[0044] When the battery power is less than 20%, a power shortage reminder is given through the power reminder module to remind the user to replace the battery. At the same time, the intelligent recipe under the control of the main control module does not respond, the motor gas valve is half open, the bistable valve is opened, the fixed firepower is set, and the power is saved.

[0045] When the timing function is turned on and the timing time arrives, it is detected whether the bottom pot temperature detected by the temperature sensor is within the set target temperature range, that is, T 实 =T 设 ± K. If so, the current state is maintained; if T 实 is greater than T 设 ± K, the opening of the motor gas valve is reduced within a certain range. If it is still greater than T 设 ±K after being adjusted smaller, the bistable valve is closed; if T 实 is less than T 设 ± K, the opening of the motor gas valve is increased within a certain range. Among them, T 实 represents the actual bottom pot temperature detected by the temperature sensor under the intelligent recipe; T 设 represents the set target temperature under the intelligent recipe; K represents the allowable error between the detected temperature and the target temperature, and K generally takes a value of 10. During this process, T 实 can change at any time according to the temperature change of T 设 , that is, the target temperature set in the recipe can be a variable that changes with time, or a temporary constant. For example, in the intelligent recipe, the temperature at the previous moment is 180°C, and after a period of time, the target temperature requirement is reduced to 120°C, then the new target temperature needs to be adjusted.

[0046] In the above process, a 1 is generally small, about 0.3S; a 2 is generally 0.5S. During the time difference between a 1 and a 2 , the current of the inner coil 7 is mainly controlled to offset the influence of the magnetic field of the outer coil 8 at the previous moment, and at the same time reduce the overall power consumption during ignition. a 3 is generally 4S, which realizes the transition of maintaining reliable power supply with the thermocouple by controlling the small current of the inner coil 7 when the power generation of the thermocouple is insufficient just after ignition, ensuring the normal combustion of the system after ignition. The above time interval is determined by the design of the distance between the inner and outer coils 8. In this application, the design of the distance between the inner and outer coils 8 is small, so that just in the second stage a 2That is, the coupling design between the two magnetic fields in the first step is achieved in 0.5 seconds, ensuring the reliability of the suction valve in the second step (i.e., the process of stable suction), and also ensuring a in the first step 1 It only takes a short time to be powered on, which is a design for comprehensively reducing power consumption. After the timing function is turned on and the timing time condition is met, the system cuts off the power supply of the self-suction valve on the main air path to ensure the reliability of timing to turn off the fire. For cooktops equipped with temperature sensors, by collecting the temperature of the bottom of the pot, the opening degree of the motor gas valve and the state of the bistable valve are infinitely adjusted through temperature parameters, so as to achieve precise control of firepower, temperature and time, and further realize the intelligent cooking function powered by battery.

[0047] The embodiment of the present application also provides an intelligent stove, including a stove body and the above control system, and the control system is arranged inside the stove body.

[0048] The beneficial effects of the embodiment of the present application: 1. Through the structural and magnetic circuit innovation design of the low-power self-suction thermocouple valve, automatic suction can be achieved, without the need to assist in suction ignition by manually pressing the valve stem (knob), and easy cleaning of the stove top and full-touch screen intelligent control can be realized; 2. During the cooking process, rely on the thermocouple to generate electricity to maintain the opening of the self-suction thermocouple valve, realizing extremely low power consumption during the cooking process and greatly extending the service life of the battery; 3. Through the combination of the low-power self-suction thermocouple solenoid valve for stove flameout protection and the self-suction valve on the main air path, the ultimate safety protection of the system is realized, completely avoiding the deficiencies of the existing solutions in the case of insufficient battery power, loose connection of the reverse current circuit, abnormal circuit, solenoid valve coil failure, etc., or the problem of inability to close the valve when the timing is up; 4. Through the low-power motor gas valve and the bistable valve system of the outer ring fire, only when the firepower needs to change, electric energy is consumed for infinitely variable firepower adjustment, and no electric energy is consumed during the rest of the cooking time, so as to realize the low power consumption and automatic firepower adjustment of the overall intelligent stove system.

[0049] Although the preferred embodiments of the embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

[0050] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the said element.

[0051] The above has introduced in detail a low-power self-priming thermocouple solenoid valve, a control system and an intelligent stove provided by the present invention. Specific examples are used in this text to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A low-power self-priming thermocouple solenoid valve, characterized in that: It includes a housing, a valve seat, a sealing gasket, a moving iron core and a static iron core, wherein the valve seat is fixedly connected to the bottom of the housing, and the sealing gasket is arranged above the housing; The lower end of the moving iron core is movably arranged inside the shell, and the upper end of the moving iron core is connected to the sealing gasket and is sleeved with a spring; the spring abuts between the sealing gasket and the shell; The static iron core is fixed inside the shell and is located below the moving iron core; an inner coil is wound around the outside of the static iron core; An outer coil is wound around the inner wall of the shell, the outer coil corresponds to the outer sides of the moving iron core and the static iron core, and has a preset distance from the inner coil.

2. The low-power self-priming thermocouple solenoid valve according to claim 1 is characterized in that: A flange bracket is sleeved on one end of the valve seat away from the shell; the negative pins of the inner coil and the outer coil are connected to the flange bracket, and the positive pins of the inner coil and the outer coil pass through the bottom of the valve seat.

3. The low-power self-priming thermocouple solenoid valve according to claim 2 is characterized in that: A fixed armature is arranged at one end of the moving iron core close to the static iron core.

4. The low-power self-priming thermocouple solenoid valve according to claim 3 is characterized in that: A fixed boss is arranged inside the valve seat, and the static iron core is supported on the fixed boss.

5. The low-power self-priming thermocouple solenoid valve according to claim 3 is characterized in that: A plastic sealing piece is arranged at the bottom of the fixing boss, and two plug pins are inserted into the plastic sealing piece; the positive pins of the inner coil and the outer coil are connected to the two plug pins in a one-to-one correspondence.

6. A control system, characterized in that: It comprises the solenoid valve according to any one of claims 1 to 5, as well as a main control module, a total self-priming valve, a motor gas valve, a bistable valve, a thermocouple and an igniter, wherein the igniter, the total self-priming valve, the motor gas valve, the bistable valve and the solenoid valve are electrically connected to the main control module respectively; The igniter is used to trigger the solenoid valve to open through the main control module; The main self-priming valve is used to control the on-off of the main air intake circuit; The motor gas valve is used to control the amount of gas passing through the gas path; The bistable valve is used to control the opening and closing of the outer ring fire; The thermocouple is electrically connected to the inner coil of the solenoid valve, and is used to detect the flame temperature, and convert the temperature signal into an electrical signal and transmit it to the solenoid valve to maintain the solenoid valve self-priming open; During operation, the main self-priming valve, the solenoid valve, the motor gas valve and the bistable valve are powered on and opened; Among them, when the outer coil and inner coil of the solenoid valve are energized for t1 time, the main control module controls the outer coil current to drop to 0 and maintain it for t2 time, then controls the inner coil current to drop to a preset value and maintain it for t3 time, and then controls the inner coil current to drop to 0. At this time, the solenoid valve is kept open by thermocouple power generation.

7. The control system according to claim 6, characterized in that: Also includes a timer, the timer is electrically connected to the main control module; The timer is used to record the power-on time of the outer coil and the inner coil respectively, so as to realize the power-on control of the outer coil and the inner coil respectively.

8. The control system according to claim 6, characterized in that: It also includes an operation communication module and a temperature sensor detection module, wherein the operation communication module and the temperature sensor detection module are electrically connected to the main control module respectively; The operation communication module is used for human-computer interaction to realize function selection; The temperature sensor detection module is used to detect the temperature of the bottom of the pot, and transmit the temperature data to the main control module for comparison with the set target temperature to achieve control of the temperature, firepower and cooking time.

9. The control system according to claim 8, characterized in that: It also includes a timing reminder module and a power reminder module, wherein the timing reminder module and the power reminder module are electrically connected to the main control module respectively; The timing reminder module is used to control the main self-priming valve to close through the main control module after the timing condition is met; The power reminder module is used to control the closing of some function menus of the operation communication module through the main control module when the power is low.

10. A smart stove, characterized in that: The invention comprises a stove body and the control system according to claim 6, wherein the control system is arranged inside the stove body.

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