An induction heating system for fins based on the mutual frequency principle

Abstract

An induction heating system applied to fins based on the mutual frequency principle relates to the technical field of heating systems, and solves the technical problem of urgently providing a method for heating fins. The heating system, as an emission source, includes a mutual frequency heating main control board and a mutual frequency power device. The mutual frequency heating main control board includes a rectifier filter circuit, a current detection circuit, a mutual frequency power device, a drive circuit, an auxiliary power supply circuit and a controller. The mutual frequency power device can generate an alternating magnetic field to generate eddy current heat in the fins. The present invention can perform induction heating on the fins of heat exchangers such as evaporators and condensers, and can design various parameters of the heating system such as the mutual frequency heating main control board hardware circuit, software module, single magnetic induction group parameters, arrangement between transmitting magnetic induction groups, and matching between transmitting magnetic induction groups and resonators according to different usage scenarios (such as heating distance, area, environment, etc.) and functional requirements (heating time, temperature, abnormal alarm, etc.), and has universality.

Description

Technical Field

[0001] The present invention relates to the technical field of heating systems, and in particular to an induction heating system based on the mutual frequency principle and applied to fins of heat exchangers such as evaporators and condensers. Background Art

[0002] Fins are usually installed on the surface of heat exchange devices that need to conduct heat. They have strong thermal conductivity and are used to increase the heat exchange surface area of ​​the heat exchange device, enhance the heat exchange performance between the heat exchanger and the external fluid, and improve the heat exchange efficiency of the heat exchanger. Heat exchangers can be used as heaters, condensers, evaporators, coolers, reboilers, etc., including shell and tube structures and plate structures. Fins in the prior art are usually made of aluminum, but are not limited to aluminum. Fins include winding type, plate type, etc. The specific structure, shape and size of the fins are designed according to needs and usage scenarios.

[0003] In the application of fin-type heat exchangers, based on the application scenario of the heat exchanger and the use requirements of the equipment equipped with the heat exchanger, the fins need to be heated, for example, to defrost the fins, and for example, to achieve heat conduction from the heat exchanger to other objects by heating the fins. In response to these application requirements for heating the fins, some use resistance heating tubes to heat the fins (such as defrosting the fins on the refrigerator evaporator), and some heat exchangers use reverse refrigeration heating to achieve defrosting of the fins (such as defrosting the fins on the air conditioner outdoor unit heat exchanger). However, these methods of heating the fins have various disadvantages, such as the following problems: (1) In a closed space, the air is heated by heating the resistance heating tube and then the heat is transferred to the fins for defrosting. This heating method has extremely high temperature requirements for the resistance heating tube. Not only is the heating speed slow, but the heating tube is also very easy to be damaged: such as the refrigerator evaporator; (2) In an open environment, if the ambient temperature is very low, most of the heat will be lost in the environment during the process of heating the air by heating the heating tube and then transferring the heat to the fins, and the defrosting effect is extremely low, such as the air conditioner outdoor unit condenser. Therefore, current air conditioner condensers mostly use reverse cooling to defrost the fins. However, this method not only fails to heat the room during the defrosting process, but also absorbs heat from the room, causing a maximum temperature difference of 8°C in the room; (3) When the area of ​​the fin to be defrosted is large, the resistance heating tube is not easy to match; (4) The energy consumed in heating the fins is relatively high, resulting in energy waste. (5) It affects the normal operation of the equipment installed with the heat exchanger. For example, when the fins of the refrigerator evaporator are defrosted or the fins of the air conditioner condenser are defrosted, the refrigeration or heating work cannot be normal. Therefore, it is urgent to provide a technology that can heat the fins to solve the fin heating problem existing in the prior art. Summary of the invention

[0004] In order to solve the above problems in the prior art, the present invention provides an induction heating system applied to fins based on the mutual frequency principle.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0006] An induction heating system for fins based on the mutual frequency principle comprises a mutual frequency heating main control board and a mutual frequency power device, wherein the mutual frequency heating main control board comprises a rectifier filter circuit, a current detection circuit, a drive circuit, an auxiliary power supply circuit and a controller, wherein the rectifier filter circuit is connected to the current detection circuit, the current detection circuit is connected to the mutual frequency power device and the controller, the auxiliary power supply circuit is connected to the controller, the controller is connected to the drive circuit, and the drive circuit is connected to the mutual frequency power device; the rectifier filter circuit provides the current and voltage for the mutual frequency power device to work, the current detection circuit is used to detect the current output by the rectifier filter circuit to obtain first current data, the mutual frequency power device is used to generate an alternating magnetic field so that the fin generates eddy current to generate heat, the auxiliary power supply circuit serves as the working power supply of the controller, the working frequency of the mutual frequency power device can be controlled by the controller and the drive circuit, and the controller can collect the first current data and cut off the working voltage of the mutual frequency power device through the drive circuit accordingly.

[0007] The beneficial effects of the present invention are:

[0008] The present invention proposes an induction heating system for heating fins, which adopts electromagnetic induction technology based on the mutual frequency effect. On the basis of electromagnetic induction technology, the mutual frequency non-radiation principle is combined to control the influence of the natural frequency between the emission source and the fin, so that the two can naturally form an internal dynamic mechanism closed-loop system, which can realize sensing control by sensing the change of the natural frequency, and has low sensitivity to interference from the environment, technical parameters, etc. And for non-ferromagnetic metals (such as aluminum, copper, gold, etc.) in metals, induction heating can be achieved when the metal thickness reaches the inflection point (micrometer level).

[0009] The present invention is based on the electromagnetic induction principle of the mutual frequency effect, according to the concept that the natural frequencies change under different conditions due to mutual influence, and based on the technical background of long-distance wireless energy transmission and perception control. It can achieve that for each design link, the required hardware circuit part on the mutual frequency heating main control board, the software function module on the controller, the power density of a single coil of the transmitting magnetic induction group in the mutual frequency power device, the arrangement between the transmitting magnetic induction groups, and the matching between the transmitting magnetic induction group and the resonator can be matched from the heating system according to the specific usage scenarios of the fins (induction heating area, induction heating distance, induction heating metal material, heating power, heating environment, etc.) and functional requirements (heating purpose, heating time, temperature range, abnormal alarm, etc.). Flexible matching and adjustment can achieve induction heating for specific usage scenarios and requirements, and the invention has universality.

[0010] The present invention has high heating efficiency, has no potential safety hazard, and can heat the fins synchronously when equipment such as a refrigerator or air conditioner is operating normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The hardware circuit structure diagram of the induction heating system applied to fins based on the mutual frequency principle of the present invention.

[0012] Figure 2 The present invention is a controller software functional module structure diagram of an induction heating system for fins based on the mutual frequency principle.

[0013] Figure 3 The schematic diagram is a structural diagram of an induction heating system applied to fins based on the mutual frequency principle of the present invention.

[0014] Figure 4 The present invention is a structural diagram of a mounting plate and a transmitting magnetic induction group of an induction heating system applied to fins based on the mutual frequency principle.

[0015] Among them: 1. mutual frequency heating main control board, 2. mounting plate, 3. resonator, 4. fins, 5. transmitting magnetic induction group. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0017] An induction heating system for fins based on the mutual frequency principle, the heating system is used as a transmitting source, and the heating system is used to generate an alternating magnetic field. The heating system includes a mutual frequency heating main control board 1 and a mutual frequency power device, and the mutual frequency heating main control board 1 includes a rectifier filter circuit, a current detection circuit, a drive circuit, an auxiliary power supply circuit and a controller. Figure 1 , the rectifier filter circuit, the current detection circuit and the mutual frequency power device are connected in series, the auxiliary power supply circuit, the controller, the drive circuit and the mutual frequency power device are connected in series, the rectifier filter circuit is connected to the current detection circuit, the current detection circuit is connected to the mutual frequency power device and the controller, the auxiliary power supply circuit is connected to the controller, the controller is connected to the drive circuit, and the drive circuit is connected to the mutual frequency power device. The rectifier filter circuit is used to provide the current and voltage for the mutual frequency power device to work, the current detection circuit is used to detect the current data output by the rectifier filter circuit to obtain the first current data and send it to the controller, and the mutual frequency power device can generate an alternating magnetic field after being energized, so that the fin 4 generates eddy current heat, thereby realizing induction heating of the fin 4. The auxiliary power supply circuit serves as the working power supply of the controller, and is used to provide the working current and voltage of the controller. The controller can collect the first current data of the current detection circuit and can make judgments and / or analyses based on it, and can control the working state of the mutual frequency power device through the drive circuit according to the results of the judgment and / or analysis; the controller can control the working frequency of the mutual frequency power device through the drive circuit.

[0018] An induction heating system based on the mutual frequency principle and applied to fins is used as a transmitting source, a mutual frequency heating main control board 1 is used as a transmitting module for wireless heating, a heat exchanger having the fins 4 is used as a target of the transmitting source, such as an air conditioner condenser or a refrigerator evaporator as a target, and the fins 4 on the air conditioner condenser or the refrigerator evaporator are used as a heat carrier of the target, the material of the heat carrier is a metal material, and the transmitting source and the target are connected by mutual frequency induction. The mutual frequency power device includes a resonator 3 and a transmitting magnetic induction group 5, the resonator 3 and the transmitting magnetic induction group 5 are connected in series to form a transmitting resonator, and the transmitting resonator is connected in series with a current detection circuit and a driving circuit. The transmitting magnetic induction group 5 includes a coil and a magnetic material connected to the coil. According to the power required by the target and the limiting conditions (such as heating area, distance, etc.), the system parameters such as the power density of a single coil, the arrangement between the transmitting magnetic induction groups 5, and the matching between the transmitting magnetic induction group 5 and the resonator 3 can be flexibly designed, and then the designed transmitting magnetic induction group 5 is connected according to the set arrangement.

[0019] The above-mentioned rectifier and filter circuit is connected to an external power supply. The above-mentioned auxiliary power supply circuit can be connected to the rectifier and filter circuit, and can also be connected to an external power supply.

[0020] After the mutual frequency heating main control board 1 is connected to 220V AC, the 220V AC is converted into pulsating DC by the rectifier and filter circuit and then provided to the mutual frequency power device. The auxiliary power supply converts the 220V AC\pulsating DC into the low voltage power required by the controller for the controller to work. The controller can output a signal, which is amplified by the drive circuit to control the working state of the mutual frequency power device, usually including controlling the power of the mutual frequency power device and controlling the switch of the mutual frequency power device. When the mutual frequency power device is working, it generates an alternating magnetic field, which causes the fin 4 to generate eddy current and thus generate heat.

[0021] The software function module is embedded in the single chip microcomputer in the hardware circuit controller, and controls the inter-frequency power device together with the hardware circuit. Figure 2 The controller includes a data acquisition module, a foreign object detection module, a user interface module and a power regulation module, and the controller also includes a system protection circuit and a timing module. The user interface module, the power regulation module and the data acquisition module directly transmit signals with the hardware circuit. The data acquisition module is connected to the current detection circuit, the foreign object detection module, the system protection circuit, the user interface module and the power regulation module, the user interface module is connected to the foreign object detection module, the system protection circuit, the power regulation module and the timing module, and the foreign object detection module, the system protection circuit and the power regulation module are all connected to the drive circuit.

[0022] When the controller determines that the first current data is less than the preset value, the controller cuts off the working voltage of the inter-frequency power device through the driving circuit. The above-mentioned controller can collect the first current data of the current detection circuit and can control the working state of the inter-frequency power device through the driving circuit accordingly. Corresponding to the foreign body detection function, when the target party is in a state where a foreign body exists, the system is in a detuned state, and the rectifier and filter circuit supplies a smaller current to the inter-frequency power device. The first current data detected by the current detection circuit is fed back to the data acquisition module to realize the conversion between the electrical signal and the digital signal and then sent to the foreign body detection module. The foreign body detection module obtains the detection result of the presence of foreign matter and feeds back the detection result to the driving circuit and the user interface module. The driving circuit controls the inter-frequency power device to be powered off, and the user interface module gives the user a corresponding sound and light prompt according to the preset reminder method. Specifically: the data acquisition module can collect the first current data and send it to the foreign object detection module. The foreign object detection module can determine whether the inter-frequency power device corresponds to the preset fin 4 according to the first current data, and can determine whether there are other objects between the inter-frequency power device and the preset fin 4 according to the first current data. If the inter-frequency power device does not correspond to the preset fin 4 (not the preset fin 4 but other metal equipment, that is, the heat carrier at this time is a foreign object), or there are other objects between the inter-frequency power device and the preset fin 4 (there are foreign objects between the inter-frequency power device and the preset fin 4 to interfere with heating), the foreign object detection module sends foreign object information to the drive circuit and the user interface module. The drive circuit can receive the foreign object information and cut off the working voltage of the inter-frequency power device accordingly, that is, control the inter-frequency power device to shut down; the user interface module can receive the foreign object information and display and\or alarm accordingly.

[0023] The above-mentioned "the controller can control the working frequency of the inter-frequency power device through the driving circuit" corresponds to the frequency adjustment function of the heating system. The power of the inter-frequency power device is adjusted by the frequency. When the user wants to adjust the temperature, the user transmits the temperature adjustment information to the power adjustment module through the user interface module, and the power adjustment module controls the driving circuit according to the instruction to realize the power adjustment function of the inter-frequency power device. Specifically: the data acquisition module can collect the voltage of the inter-frequency power device to obtain the first voltage data, and the data acquisition module can send the first current data and the first voltage data to the power adjustment module; the user interface module is used to input the preset temperature, the user interface module can obtain the temperature adjustment information according to the preset temperature, the user interface module sends the temperature adjustment information to the power adjustment module, and the power adjustment module can adjust the output power of the inter-frequency power device by controlling the driving circuit according to the temperature adjustment information, the first current data and the first voltage data.

[0024] The timing function is realized by the timing module. When the user uses the time setting function, the time setting signal is transmitted to the timing module through the user interface module. After the set time, the timing module transmits the timing signal to the user interface module again. The user interface module prompts the user. The user interface module can also turn on or off the inter-frequency power device through the driving module according to the timing signal.

[0025] The data acquisition module is used to collect and send the heating system temperature data, heating system voltage data and heating system current data. The heating system temperature data may include the temperature data of the rectifier filter circuit, the temperature data of the current detection circuit, the temperature data of the inter-frequency power device, the temperature data of the drive circuit, the temperature data of the auxiliary power supply circuit, and part or all of the ambient temperature outside the heating system. The heating system voltage data includes the voltage data of the rectifier filter circuit, the voltage data of the current detection circuit, the voltage data of the inter-frequency power device (first voltage data), the voltage data of the drive circuit, and the voltage data of the auxiliary power supply circuit. The heating system current data includes the first current data, the current data of the drive circuit, and part or all of the current data of the auxiliary power supply circuit. The system protection module receives the heating system temperature data, the heating system voltage data and the heating system current data and judges whether the heating system is operating normally, that is, whether it is within the set threshold range. If the operation is abnormal (a certain voltage / current / temperature is not within the set threshold range), an alarm is issued through the user interface module, and the system protection module cuts off the voltage of the inter-frequency power device through the drive circuit. The data acquisition module is connected to the user interface module. The data acquisition module sends the detected temperature data of the heating system to the user interface module. The user interface module displays the temperature data of the heating system sent by the data acquisition module.

[0026] The present invention is an induction heating system for fins based on the mutual frequency principle. Through the present invention, the fins 4 of heat exchangers such as evaporators and condensers can be heated. The fins 4 are made of metal, such as aluminum, aluminum alloy, copper, etc. The material of the fins 4 can be ferromagnetic or non-ferromagnetic. The present invention is used to heat and defrost the fins 4 of heat exchangers such as evaporators and condensers, and to conduct heat to other material objects based on the fins 4 (for example, heating the air / organic materials through the fins 4). The hardware circuit of the transmitting source, the software function module, the power density of a single coil, the arrangement between the transmitting magnetic induction group 5, and the matching between the transmitting magnetic induction group 5 and the resonator 3 and other system parameters can be flexibly designed to achieve different functions in different application scenarios: the present invention can perform induction heating on all structures containing evaporators or condensers, and the material, shape, and size of the target metal can be matched according to actual conditions; the hardware circuit module of the transmitting source, the software function module, and the power, quantity, arrangement of the coil and the parameters related to the heating system can be designed and matched according to needs, and have universality. Figure 3 This is an application state diagram of the present invention, the number of fins 4 is multiple, such as Figure 4 Four transmitting magnetic induction groups 5 are installed on the mounting plate 2. The transmitting magnetic induction groups 5 on the mounting plate 2 face the fins 4. The fin surface of the fins 4 is perpendicular to the transmitting magnetic induction groups 5. Figure 3 The middle mounting plate 2 is perpendicular to the fin surface of the fin 4 .

[0027] A refrigerator refrigeration system needs to use an evaporator, and an air conditioner needs to use a condenser. The present invention can be applied to refrigerators and air conditioners.

[0028] The present invention is described in detail below using an air conditioner as an example. The present invention can be used for defrosting the evaporator of an outdoor unit of an air conditioner. The circuit board of the air conditioner itself is defined as the main control board of the device. The mutual frequency heating main control board 1 of the present invention is placed around the main control board of the device and the two are connected by circuit to realize communication (the main control board of the device issues an instruction to start or stop defrosting to the mutual frequency heating main control board 1). When the main control board of the device detects that defrosting is required, the defrost signal is transmitted to the mutual frequency heating main control board 1. After receiving the defrost signal, the mutual frequency heating main control board 1 supplies power to the mutual frequency power device, generates an alternating magnetic field, and causes the non-ferromagnetic aluminum fins provided on the condenser to generate eddy current heat to realize efficient defrosting. One side edge of the fin 4 is adjacent to the transmitting magnetic induction group 5 of the mutual frequency power device and faces the transmitting magnetic induction group 5 of the mutual frequency power device. Usually, the transmitting magnetic induction group 5 is arranged perpendicular to the fin 4, and the two surfaces (fin surfaces) of the fin 4 are perpendicular to the transmitting magnetic induction group 5. The hardware circuit, number of coils, coil power, coil arrangement and software functional modules are modularly configured according to the usage scenario and specific requirements of the equipment.

[0029] For defrosting of the air conditioner condenser, the prior art currently uses reverse refrigeration defrosting technology for defrosting the fins 4 on the air conditioner condenser. However, this method not only fails to heat the room during the defrosting process, but also absorbs heat from the room, causing a maximum temperature difference of 8°C in the room, and usually when the outdoor temperature is below -10°C, the air conditioner cannot work properly because the outdoor unit heat exchanger cannot defrost. When the fins 4 of the air conditioner condenser are at an ambient temperature of minus 10°C, defrost is performed regularly when the frost reaches 50g. The induction heating system of the present invention is pre-set to defrost for 2 minutes, and the defrosting measurement data is:

[0030] Calculate the amount of heat required to convert 50g of frost into water: Q 霜 =1.15×10 3 J;

[0031] Fin 4 can be defrosted by heating it to 5°C with the outdoor temperature of -10°C as reference. The amount of heat required is: Q 冷凝器 =9.73×10 3 J;

[0032] The whole heating process takes into account the heat loss caused by air convection: Q 散失 =24×10 3 J;

[0033] Combining only the above three conditions and ignoring other influencing factors, the total heat required by the system is: Q 总 =34.88×10 3 J; the required heating power is P = 290.67W;

[0034] The present invention solves the problem that when the heat exchanger works in an open environment, the equipment cannot work normally because the fins 4 cannot be effectively defrosted when the outdoor temperature is lower than a certain value, thereby solving the pain point of the industry.

[0035] The present invention adopts electromagnetic induction technology based on the mutual frequency effect. On the basis of the current electromagnetic induction technology, the mutual frequency non-radiation principle is combined to control the natural frequency influence between the mutual frequency heating main control board 1 and the fin 4, so that the two can naturally form an internal dynamic mechanism closed-loop system, which can realize perception control by sensing the change of the natural frequency, and has low sensitivity to interference from the environment, technical parameters, etc. And through parameter setting and material ratio, the induction transmission distance can reach 30mm, and the induction heating efficiency can reach more than 95%, exceeding the national standard first-level energy efficiency by 5%. The industrial level can reach up to 20cm, greatly reducing the limitation of the induction distance.

[0036] The present invention is based on the electromagnetic induction principle of the mutual frequency effect, according to the concept that the natural frequencies change due to the mutual influence under different conditions, and based on the technical background of long-distance wireless energy transmission and perception control, to achieve the matching of the required mutual frequency heating hardware circuit part on the main control board 1, the software function module on the controller, the power density of a single coil, the arrangement between the transmitting magnetic induction group 5, and the matching between the transmitting magnetic induction group 5 and the resonator 3 for each part from the heating system, so as to match the most suitable emission source for the specified situation, and the heating efficiency is high, the speed is fast, there is no safety hazard, and the heating can be performed synchronously when the equipment is working normally, thereby minimizing the impact on the normal operation of equipment such as refrigerators / air conditioners.

[0037] The induction heating system for fins based on the mutual frequency principle of the present invention adopts the electromagnetic induction heating technology based on the mutual frequency principle to provide an induction heating system for (aluminum) fins 4. The aluminum fins can be located on but not limited to condensers and evaporators, and are suitable for all heat exchangers with fins 4, suitable for heating fin 4 structures, and suitable for all mechanisms that have and need to heat aluminum fins. As a wireless induction heating system, the present invention is based on the use of mutual frequency technology, which is not only suitable for heating non-ferromagnetic metals and greatly increases the induction heating distance, but also breaks the current deadlock of many drawbacks in heating the heat exchanger fins 4, and can achieve efficient heating of the induction metal by flexibly designing the heating system parameters such as the hardware circuit part, the software function module, the power density of a single coil, the arrangement between the transmitting magnetic induction group 5, and the matching between the transmitting magnetic induction group 5 and the resonator 3 for different scenarios and functional requirements, and can be applied to the required situation. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An induction heating system for fins based on the mutual frequency principle, characterized in that: It includes a mutual frequency heating main control board and a mutual frequency power device, wherein the mutual frequency heating main control board includes a rectifier filter circuit, a current detection circuit, a drive circuit, an auxiliary power supply circuit and a controller, wherein the rectifier filter circuit is connected to the current detection circuit, the current detection circuit is connected to the mutual frequency power device and the controller, the auxiliary power supply circuit is connected to the controller, the controller is connected to the drive circuit, and the drive circuit is connected to the mutual frequency power device; The rectifier and filter circuit provides the current and voltage for the mutual frequency power device to work. The current detection circuit is used to detect the current output by the rectifier and filter circuit to obtain the first current data. The mutual frequency power device is used to generate an alternating magnetic field so that the fins can generate eddy currents to generate heat. The auxiliary power supply circuit serves as the working power supply of the controller. The working frequency of the mutual frequency power device can be controlled through the controller and the drive circuit. The controller can collect the first current data and cut off the working voltage of the mutual frequency power device through the drive circuit accordingly. The mutual frequency power device includes a resonator and a transmitting magnetic induction group, the resonator and the transmitting magnetic induction group are connected in series, and the transmitting magnetic induction group includes a coil and a magnetic material connected to the coil; The controller comprises a data acquisition module, a foreign object detection module, a user interface module and a power regulation module, wherein the data acquisition module is connected to the current detection circuit, the foreign object detection module, the user interface module and the power regulation module, the user interface module is connected to the foreign object detection module and the power regulation module, and the foreign object detection module and the power regulation module are both connected to the driving circuit; The data acquisition module can acquire the voltage of the inter-frequency power device to obtain the first voltage data, and the data acquisition module can send the first current data and the first voltage data to the power regulation module; The user interface module is used to input a preset temperature, and the user interface module can send temperature adjustment information to the power adjustment module according to the preset temperature, and the power adjustment module can adjust the working power of the inter-frequency power device by controlling the driving circuit according to the temperature adjustment information, the first current data and the first voltage data; The data acquisition module can collect first current data and send it to the foreign object detection module. The foreign object detection module can determine whether the inter-frequency power device corresponds to a preset heat receiving carrier according to the first current data, and can determine whether there are other objects between the inter-frequency power device and the preset heat receiving carrier according to the first current data. If the inter-frequency power device does not correspond to the preset heat receiving carrier or there are other objects between the inter-frequency power device and the preset heat receiving carrier, the foreign object detection module sends foreign object information to the drive circuit and the user interface module. The drive circuit can receive the foreign object information and cut off the working voltage of the inter-frequency power device accordingly. The user interface module can receive the foreign object information and display and / or alarm accordingly.

2. An induction heating system for fins based on the mutual frequency principle as claimed in claim 1, characterized in that: The fins are located on the evaporator or the condenser.

3. An induction heating system for fins based on the mutual frequency principle as claimed in claim 2, characterized in that: The heating system can match the hardware circuit of the mutual frequency heating main control board, the software function module of the mutual frequency heating main control board, the power density of a single transmitting magnetic induction group, the matching between the transmitting magnetic induction group and the resonator, and the arrangement between the transmitting magnetic induction groups according to the usage scenario of the fins and the functional requirements of the fins.

4. The induction heating system for fins based on the mutual frequency principle according to claim 1, characterized in that: The controller also includes a timing module connected to the user interface module.

5. The induction heating system for fins based on the mutual frequency principle according to claim 1, characterized in that: The controller also includes a system protection module, the data acquisition module is connected to the system protection module, the system protection module is connected to the user interface module and the drive circuit, the data acquisition module is used to collect and send the heating system temperature data, the heating system voltage data and the heating system current data, the system protection module receives the heating system temperature data, the heating system voltage data and the heating system current data and judges whether the heating system is operating normally based on them, if the operation is not normal, the system protection module cuts off the working voltage of the inter-frequency power device through the drive circuit.

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