Energy-saving electric heating component and cooking appliance with the same

Abstract

The utility model aims at providing a kind of energy-saving electric heating component and cooking utensil with the component, including the main part for transmitting heat, the back sintering connection of main part has heating component, heating component includes at least one group of heating element, a group of heating element is made of two heating bodies, master control module provides electric energy to control heating body temperature rise, cooling or stop providing electric energy to heating body by to heating component.This component uses electric energy heating, not only has the advantages of faster heating efficiency, higher heat utilization rate, but also can automatically adjust temperature according to actual needs, with the effect of energy saving, safety.

Description

Technical Field

[0001] This utility model relates to the field of electric heating, and in particular to an energy-saving electric heating component and a cooking appliance incorporating the component. Background Technology

[0002] There are many types of barbecues, including barbecue pans, iron plates, iron mesh, and long grill racks. Most of them use charcoal. Currently, barbecue pans on the market are divided into: charcoal grills and gas grills (these are open-flame grilling products, which have a certain risk of carbon monoxide poisoning and fire), heating element barbecue pans, and induction cooker barbecue pans (the drawback of these products is that they heat up slowly and have low heat utilization, only 65% ​​or less. The power of these products generally ranges from 1500W to 3500W, and the surface may turn red, which also poses a risk of open flame; moreover, these products also have a certain amount of electromagnetic radiation, which poses a certain risk to infant development). If you are using outdoor power for picnics, one kilowatt-hour of electricity will only last for 20-40 minutes.

[0003] Meanwhile, current barbecue grill products on the market have low heat recovery rates and short battery life. The surface of the barbecue grill is usually coated with Teflon paint, which is easy to peel off. Existing barbecue grills are not convenient to disassemble and carry.

[0004] To this end, the applicant previously invented a portable barbecue grill with silver paste heating, as detailed in the authorization announcement text of application number CN202322199366.3. The grill includes a base plate, a barbecue grill body fixedly connected to the top of the base plate, a sintered layer of heating silver paste fixedly connected to the bottom of the barbecue grill body, uniformly distributed strip-shaped protrusions fixedly connected to the top of the barbecue grill body, a lid on the top of the barbecue grill body, a support leg on the left side of the bottom of the base plate, an electronic control leg on the right side of the bottom of the base plate, a control interface penetrating and fixedly connected to the front of the electronic control leg, an NTC temperature control component fixedly connected to the right side of the bottom of the barbecue grill body, the NTC temperature control component penetrating the base plate and the electronic control leg, a second quick-connect interface penetrating and fixedly connected to the center of the bottom of the NTC temperature control component, magnetic blocks fixedly connected to the four corners of the bottom of the base plate, with the left and right magnetic blocks penetrating the support leg and the electronic control leg respectively, and heat dissipation holes penetrating and provided at the front and rear of the bottom of the electronic control leg.

[0005] This type of barbecue grill uses a high-resistance heating silver paste sintered layer on a tungsten steel grill body. While it has the advantages of faster heating efficiency and higher heat utilization, the entire grill is heated as a whole. However, when grilling food, the food may only be placed in a certain area. In this case, it is not energy-efficient to still supply heat to the entire grill. Utility Model Content

[0006] The purpose of this utility model is to provide an energy-saving electric heating component. This component uses electric energy for heating, which not only has the advantages of faster heating efficiency and higher heat utilization rate, but also can automatically adjust the temperature according to actual needs, thus achieving energy-saving and safety effects.

[0007] An energy-saving electric heating component includes a main body for transferring heat, a heating element sintered to the back of the main body, a main control module electrically connected to the heating element, the main control module being electrically connected to a power source and controlling the temperature of the heating element, the heating element including at least one set of heating elements, each set of heating elements being formed by sintering an even number of heating elements of two or more, the main control module controlling the heating element to heat up, cool down, or stop supplying power to the heating element by providing electrical energy to the heating element; When any heating element exceeds the specified temperature, and / or when the temperature of any heating element does not change within a specified time, the main control module reduces the power to the heating element or stops supplying power to it. And / or, When any heating element in a group of heating elements cools down more than another heating element, the main control module reduces the power of the heating element that cools down less or stops supplying power, while continuing to supply power to the other heating element that cools down more to make it heat up.

[0008] Preferably, the heating element is sintered from silver paste, and the main body is made of titanium alloy ceramic or thermally conductive metal.

[0009] Preferably, the main control module includes an MCU control module, a power regulation module, a temperature detection module, and a protection unit. The MCU control module is equipped with a touch detection module for adjusting the initial heating power; The power regulation module is electrically connected to the MCU control module, and is provided with a relay control branch for graded control and a thyristor power regulation branch for stepless adjustment relative to the heating component. The temperature detection module is connected to the heating component and electrically connected to the signal input terminal of the MCU control module; The protection unit is equipped with an overcurrent sampling unit and an overvoltage protection unit relative to the MCU control module.

[0010] Preferably, there are at least two relay control branches, each relay control branch corresponds to a heating element, and the two relay control branches are respectively connected to a control terminal of the MCU control module.

[0011] Preferably, the thyristor power regulation branch includes a bidirectional thyristor unit and an optocoupler isolator located at the end of the bidirectional thyristor unit away from the heat-generating component. The input terminal of the optocoupler is electrically connected to the output signal terminal of the MCU control module, and the output terminal of the optocoupler triggers the conduction angle of the thyristor unit based on the signal received at the input terminal.

[0012] Preferably, the temperature detection module includes a voltage divider circuit and a zero-crossing detection circuit: The input terminal of the voltage divider circuit is connected to the heating element, and the output terminal outputs the voltage divider signal corresponding to the signal input terminal of the MCU control module. The voltage divider circuit has at least one NTC element, and each NTC element corresponds to a set of heating elements. The zero-crossing detection circuit is equipped with a voltage divider resistor in the relative power adjustment module for extracting the zero-crossing signal and inputting it to the MCU control module.

[0013] Preferably, the touch detection module includes multiple capacitive touch springs, each of which is equipped with a current-limiting resistor, and the MCU control module is equipped with a touch detection pin relative to each touch spring, the touch detection pin being electrically connected to the current-limiting resistor; The MCU control module has a status indicator unit for each touch spring.

[0014] This utility model's technical solution employs a main control module to control the heating component, enabling the main body of the energy-saving electric heating component to achieve efficient and stable heating while also exhibiting good energy-saving effects. The heating component includes at least one set of heating elements with two heating bodies, each representing a heating temperature zone. During the initialization process of the main body, the main control module will evenly supply power to the two heating temperature zones, ensuring balanced heating. When the heating temperature zone reaches the set temperature, the main control module can adjust the power supply to keep the main body temperature within the set range.

[0015] Under the control of the main control module, when the temperature of the heating element is higher than the preset temperature, the output power exceeds the predetermined power, and / or when the heating element does not show a high temperature / power change for a long time, or when one or both heating elements are not in working condition, the main control module can reduce the power to maintain the temperature balance of the non-working heating element within the set temperature range or stop the power supply to ensure the safety of the heating component during use and to make it have a better energy-saving effect.

[0016] When the temperature drop of any heating element in a group of heating elements is much greater than that of another heating element, and one heating element is working while the other is in a standby state, a stable working state, or about to finish working, the main control module can enable the heating element in the working state to operate at full power, ensuring stable power in the initial stage of operation and improving the heating effect. The main control module can also maintain the temperature of the other heating element within a set equilibrium temperature range within a certain time limit, ensuring the operating temperature of the main body and facilitating heating. After a certain period of time, the module can control the power-off shutdown to prevent the other heating element from being in an inactive state and continuously wasting energy. Through the above structure, the energy-saving effect of the electric heating component can be effectively improved.

[0017] This utility model also proposes a cooking appliance, which includes an appliance body with an appliance base and any of the energy-saving electric heating components described above.

[0018] Preferably, the appliance body includes a grill pan surface and a grill pan bottom connected to each other by laser welding. The grill pan surface is a main body with a heating element sintered to its back. The heating element is sealed within an installation cavity formed between the grill pan surface and the grill pan bottom.

[0019] Preferably, the appliance base includes a support base and an electric control main base, the electric control main base is provided with a main control module, and both the support base and the electric control main base are provided with magnetic connectors for detachable connection to the barbecue base.

[0020] Taking a barbecue grill as an example, when the grill is heating up, both heating elements in one set of heating components heat up simultaneously and evenly. When the set temperature is reached, both heating elements reduce their power to balance and conceal heat loss, keeping the grill within the set temperature range. When the grill is not full of food, the heating element without food experiences less heat loss (a smaller temperature drop). At this time, the electronic control will reduce its power or turn off the power to maintain the set temperature range in the empty areas of the grill. When the grill is full of food, the electronic control will operate at full power until the food is cooked. If the grill temperature remains balanced within the set temperature range for a period of time (e.g., 5 minutes, 10 minutes, half an hour, one hour, etc.) without significant power fluctuations, the grill will automatically shut off, thus achieving energy savings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the main structure of the energy-saving electric heating component of this utility model; Figure 2 This is a schematic diagram of the MCU control module of the energy-saving electric heating component of this utility model; Figure 3 This is a schematic diagram of the structure of the cooking utensil of this utility model; Figure 4 This is a bottom view of the cooking appliance of this utility model.

[0023] Explanation of icon numbers: 1. Main body; 2. Appliance body; 21. Grilling plate; 22. Grilling base; 3. Appliance base; 31. Support base; 32. Electrical control main base; 4. Heating element; 5. Main control module; 6. MCU control module; 61. Touch detection module; 7. Power adjustment module; 71. Relay control branch; 72. Thyristor power adjustment branch; 73. Bidirectional thyristor unit; 74. Optocoupler isolator; 8. Temperature detection module; 81. Voltage divider circuit; 82. Zero-crossing detection circuit; 9. Protection unit. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-4 The present invention will be further described below.

[0025] Example 1 An energy-saving electric heating component includes a main body 1 for transferring heat. A heating element 4 is sintered to the back of the main body 1. The heating element 4 is electrically connected to a main control module 5, which is electrically connected to a power source and controls the temperature of the heating element 4. The heating element 4 includes at least one set of heating elements, and each set of heating elements consists of N (N≥2, N is an even number) heating elements. It should be noted that when there are two sets of heating elements 4, there are a total of 2N heating elements; when there are three sets of heating elements 4, there are a total of 3N heating elements; and so on, because N is always an even number greater than 0, meaning the number of heating elements is always even.

[0026] The main control module 5 supplies power to the heating element 4 to control the heating element to heat up, cool down, or stop supplying power to the heating element.

[0027] When any heating element exceeds the specified temperature (the specified temperature is set in advance through programming, such as 300℃ or 500℃), the main control module 5 reduces the power to the sintered layer (heating element) to stabilize the temperature within the required range, or stops supplying power to the heating element.

[0028] When any heating element does not change in temperature within a specified time (the specified time is set in advance by program programming, such as 5 minutes, 10 minutes, 30 minutes, or 60 minutes), the main control module 5 reduces the power to the sintered layer to stabilize the temperature within the required temperature range, or stops supplying power to the heating element.

[0029] When any heating element in a group of heating elements cools down more than another heating element, the main control module 5 reduces the power or stops supplying power to the heating element that cools down less, while continuing to supply power to the other heating element that cools down more to make it heat up.

[0030] By pre-setting different scenarios where power needs to be reduced or power supply stopped, the power is reduced or power supply is stopped when the specified conditions are triggered, thereby making the electric heating component sufficiently energy-efficient.

[0031] The heating element is made of silver paste and is specifically sintered on the back of the main body 1. It can be sintered into a rectangular shape, a square shape, a round shape, a strip shape, or any other arbitrary shape.

[0032] The main body 1 is made of titanium alloy ceramic or thermally conductive metal. The main body 1 is preferably integrally molded and preferably made of food-grade material.

[0033] Traditional electric heating components, such as those using heating wires, typically have a thermal conductivity of only 40%-60% due to the gap between the heating element and the main body 1. However, by using a heat-conducting material to directly sinter the heating element on the back of the main body 1, the thermal conductivity of the main body 1 can reach over 90%. Furthermore, since the main body 1 is made of food-grade materials, this energy-saving electric heating component can be used in various household appliances such as ovens, barbecue grills, and electric hot pots.

[0034] Main control module 5 includes: 6. MCU control module; 7. Power regulation module; 8. Temperature detection module; 9. Protection unit; The MCU control module 6 is equipped with a touch detection module 61 for adjusting the initial heating power. Through the touch detection module 61, users can quickly adjust the temperature that the main body 1 needs to reach, which can ensure the user's practical experience. The power regulation module 7 is used to enable the main control module to automatically adjust the temperature on the main body 1 for the purpose of energy saving. For this purpose, the power regulation module 7 is electrically connected to the MCU control module 6, and is provided with a relay control branch 71 for graded control and a thyristor power regulation branch 72 for stepless adjustment relative to the heating component 4. Temperature detection module 8 is connected to heating component 4 and electrically connected to the signal input terminal of MCU control module 6; The protection unit 9 is equipped with an overcurrent sampling unit and an overvoltage protection unit 9 relative to the MCU control module 6.

[0035] Among them, at least two relay control branches 71 are provided. Each branch is driven by an NPN transistor to drive the relay coil. The relay contacts are connected in series with the heating element. Each relay control branch 71 corresponds to a heating element. The two relay control branches 71 are respectively connected to a control terminal of the MCU control module 6.

[0036] The thyristor power regulation branch 72 includes a bidirectional thyristor unit 73 and an optocoupler 74 located at the end of the bidirectional thyristor unit 73 away from the heat-generating component 4. The input terminal of the optocoupler 74 is electrically connected to the output signal terminal of the MCU control module 6. The output terminal of the optocoupler 74 triggers the conduction angle of the thyristor unit based on the signal received at the input terminal.

[0037] The temperature detection module 8 includes a voltage divider circuit 81 composed of NTC elements (negative temperature coefficient thermistors) and precision resistors. The voltage divider signal is input to the AD-B pin of the MCU control module 6. The NTC element enables the main control module 5 to accurately know the temperature of the heating component 4, allowing the circuit to precisely adjust the output power, thereby improving the heating effect and energy saving effect. The voltage divider circuit 81 has one NTC element for each heating element, and one N N heating elements correspond to one NTC element, which can maximize the utilization efficiency of the NTC element.

[0038] The zero-crossing detection circuit 82 and the relative power adjustment module 7 are equipped with voltage divider resistors for extracting the zero-crossing signal and inputting it to the MCU control module 6.

[0039] Protection unit 9 also includes: a milliohm sampling resistor connected in series in the heating circuit, the voltage drop of which is input to MCU control module 6 for overcurrent protection; a varistor connected in parallel at the AC input terminal to absorb surge voltage; and MCU control module 6 cutting off the relay and turning off the thyristor trigger signal when it detects overcurrent or overtemperature.

[0040] The touch detection module 61 includes multiple capacitive touch springs, each with a current-limiting resistor. The MCU control module 6 has a touch detection pin for each touch spring, which is electrically connected to the current-limiting resistor. The MCU control module 6 also has a status indicator unit for each touch spring. The MCU control module 6 has a built-in capacitive sensing algorithm to detect changes in touch status, enabling users to directly adjust the temperature of the energy-saving heating element. The status indicator unit can also inform the user of the current adjustment status, effectively improving the user experience.

[0041] This utility model's technical solution uses a main control module to control the heating component 4, enabling the main body 1 of the energy-saving electric heating component to achieve efficient and stable heating while having a good energy-saving effect. The heating component 4 includes at least one set of heating elements with two heating bodies, each heating body being a heating temperature zone. When the main body 1 is in initialization mode, the main control module will evenly supply power to the two heating temperature zones to ensure balanced heating of the two heating temperature zones. When the heating temperature zone reaches the set temperature, the main control module can adjust the power supply to keep the temperature of the main body 1 within the set range.

[0042] Under the control of the main control module, when the temperature of the heating element is higher than the preset temperature, the output power exceeds the predetermined power, and / or when the heating element does not show a high temperature / power change for a long time, or when one of the two heating elements is not in working condition, the main control module can reduce the power to maintain the temperature balance of the non-working heating element of the main body 1 within the set temperature range or stop the power supply to ensure the safety of the heating component 4 during use and to make it have a better energy-saving effect.

[0043] When the temperature drop of any heating element in a group of heating elements is much greater than that of another heating element, and one heating element is working while the other is in a standby state, a stable working state, or about to finish working, the main control module can enable the heating element in the working state to operate at full power, ensuring stable power in the initial stage of operation and improving the heating effect. The main control module can also maintain the temperature of the other heating element within a set equilibrium temperature range for a certain period of time, ensuring the working temperature of the main body 1, facilitating heating, and controlling power-off shutdown after a certain period of time to prevent the other heating element from being in an inactive state and continuously wasting electrical energy. Through the above structure, the energy-saving effect of the electric heating component can be effectively improved.

[0044] Example 2 A cooking appliance includes an appliance body 2 with an appliance base 3. The appliance body 2 has the aforementioned energy-saving electric heating element fixedly mounted on it. The appliance body 2 is a barbecue pan, and the aforementioned main body 1 is a tray body. Structurally, the appliance body 2 includes a barbecue pan surface 21 and a barbecue pan bottom connected together by laser welding. The bottom of the barbecue pan surface 21 is sintered and connected to the main body 1 of the heating element 4. The heating element 4 is sealed within an installation cavity formed between the barbecue pan surface 21 and the barbecue pan bottom. The heating element 4 can be sealed and protected by the barbecue base 22. Laser welding further improves the waterproof and oil-proof performance of the entire barbecue pan, allowing it to be directly washed with water after use, greatly improving maintenance and cleaning efficiency.

[0045] Furthermore, the appliance base 3 includes a support base 31 and an electric control main base 32. The electric control main base 32 houses a main control module. Both the support base 31 and the electric control main base 32 are equipped with magnetic connectors for detachable connection to the grilling base 22. Because the base welded to the bottom of the appliance body 2 is made of metal, both the support base 31 and the electric control main base 32 can be detachably connected to the base via magnetic connectors. This allows the appliance body 2 and the appliance base 3 to be easily stored and transported separately, greatly improving the portability of the equipment and giving the assembled equipment a certain strength, making the appliance more stable during use. It should be noted that the appliance body 2 can also be a flatbread oven, a double-pot grill, a divided hot pot, or other household appliances.

[0046] When the grill pan is heating, both heating elements in one set of heating elements heat up simultaneously and evenly. Once the set temperature is reached, both heating elements reduce their power to balance and minimize heat loss, keeping the grill pan within the set temperature range. When the grill pan is not full of food, the heating element without food experiences less heat loss (a smaller temperature drop). In this case, the electronic control will reduce power or cut off power to maintain the set temperature range in the empty areas of the grill pan. When the grill pan is full of food, the electronic control will operate at full power until the food is cooked. If the grill pan temperature remains balanced within the set temperature range for a period of time (e.g., 5 minutes, 10 minutes, half an hour, one hour, etc.) without significant power fluctuations, the grill pan will automatically shut off, thus saving energy.

[0047] Furthermore, the barbecue pan made using this technology is highly portable, and can be made to the size of a small to medium-sized laptop. At the same time, the surface of the barbecue pan is easy to clean, and the main controller and the main body of the appliance 2 are magnetically attached and detached, making it easy to store and clean.

[0048] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. An energy-saving electric heating component, comprising a main body for transferring heat, a heating element sintered to the back of the main body, the heating element being electrically connected to a main control module, the main control module being used to connect to a power supply and control the temperature of the heating element, characterized in that, The heating component includes at least one set of heating elements, which is formed by sintering an even number of heating elements of two or more. The main control module supplies power to the heating component to control the heating elements to heat up, cool down, or stop supplying power to the heating elements. When any heating element exceeds the specified temperature, and / or when the temperature of any heating element does not change within a specified time, the main control module reduces the power to the heating element or stops supplying power to it. And / or, When any heating element in a group of heating elements cools down more than another heating element, the main control module reduces the power of the heating element that cools down less or stops supplying power, while continuing to supply power to the other heating element that cools down more to make it heat up.

2. The energy-saving electrothermal component according to claim 1, characterized in that, The heating element is sintered from silver paste, and the main body is made of titanium alloy ceramic or thermally conductive metal.

3. The energy-saving electrothermal component according to claim 1, characterized in that, The main control module includes: An MCU control module, wherein the MCU control module is equipped with a touch detection module for adjusting the initial heating power; A power regulation module is electrically connected to the MCU control module and has a relay control branch for graded control and a thyristor power regulation branch for stepless adjustment relative to the heating component. A temperature detection module is connected to the heating element and electrically connected to the signal input terminal of the MCU control module. The protection unit is equipped with an overcurrent sampling unit and an overvoltage protection unit relative to the MCU control module.

4. The energy-saving electrothermal component according to claim 3, characterized in that, The relay control branch is provided with at least two, each relay control branch corresponds to a heating element, and the two relay control branches are respectively connected to a control terminal of the MCU control module.

5. The energy-saving electrothermal component according to claim 3, characterized in that, The thyristor power regulation branch includes a bidirectional thyristor unit and an optocoupler isolator located at the end of the bidirectional thyristor unit away from the heat-generating component. The input terminal of the optocoupler is electrically connected to the output signal terminal of the MCU control module. The output terminal of the optocoupler triggers the conduction angle of the thyristor unit based on the signal received at the input terminal.

6. The energy-saving electrothermal component according to claim 3, characterized in that, The temperature detection module includes: The voltage divider circuit has its input terminal connected to the heating element and its output terminal corresponding to the signal input terminal of the MCU control module to output a voltage divider signal. The voltage divider circuit has at least one NTC element, and each NTC element corresponds to a set of heating elements. The zero-crossing detection circuit is provided with a voltage divider resistor relative to the power adjustment module for extracting the zero-crossing signal and inputting it to the MCU control module.

7. The energy-saving electrothermal component according to claim 3, characterized in that, The touch detection module includes multiple capacitive touch springs, each of which is equipped with a current-limiting resistor. The MCU control module is equipped with a touch detection pin relative to each touch spring, and the touch detection pin is electrically connected to the current-limiting resistor. The MCU control module has a status indicator unit for each touch spring.

8. A cooking utensil, comprising an utensil body, the utensil body having an utensil base, characterized in that, The appliance body is equipped with the energy-saving electric heating component as described in claim 1.

9. The cooking utensil according to claim 8, characterized in that, The appliance body includes a grill plate surface and a grill plate bottom connected to each other by laser welding. The grill plate surface is a main body with a heating element sintered to its back. The heating element is sealed within an installation cavity formed between the grill plate surface and the grill plate bottom.

10. The cooking utensil according to claim 9, characterized in that, The appliance base includes a support base and an electric control main base. The electric control main base contains a main control module. Both the support base and the electric control main base are provided with magnetic connectors for detachable connection to the barbecue base.

Images