Electromagnetic induction heating system and induction cooker

Abstract

The present invention discloses an electromagnetic induction heating system and an induction cooker applying the system. The heating system of the present invention includes a movement module and a coil module; the coil module is installed on the cooking surface of the induction cooker, and the movement module is installed on the bottom plate of the induction cooker. Then, the coil module and the movement module are connected through a pipeline, so that when the air extraction device extracts air inside the movement module, the coil can be simultaneously extracted. By improving the structure and heat dissipation method of the heating system, the improved structure has higher heat dissipation efficiency, simpler structure, and more convenient installation.

Description

Technical Field

[0001] The present invention belongs to the field of high-power induction cookers, and particularly relates to a heating system of a high-power induction cooker and an induction cooker. Background Art

[0002] A high-power induction cooker (also known as: high-power electromagnetic stove, high-power commercial induction cooker, high-power commercial electromagnetic stove, etc.) refers to an induction cooker (stove) with a power between 3KW and 35KW; its difference from a household induction cooker lies in the power size and application range. A high-power induction cooker is mainly used in commercial kitchens rather than household kitchens, such as restaurants, hotels, factories, schools, institutions, troops, enterprises and institutions, trains, ships, etc. in the catering industry. (See the Baidu Encyclopedia entry for high-power induction cooker).

[0003] The heating system of the existing high-power induction cooker consists of a coil and a movement. Among them, the movement is mainly composed of a strong electricity unit and a weak electricity unit. The strong electricity unit is composed of IGBT components, capacitor components, and a rectifier bridge component. The weak electricity unit is mainly a main control integrated circuit board (see CN103582195A, the movement structure of a commercial electromagnetic stove).

[0004] Its heat dissipation method usually adopts a heat dissipation method similar to that of CN202350127U (electromagnetic large stir-fry stove), CN204478185U (commercial large stir-fry stove), CN206094209U (electromagnetic large stir-fry stove), CN202350122U (electromagnetic small stir-fry stove), CN204478184U (electromagnetic commercial small stir-fry stove), CN203949228U (electromagnetic small stir-fry stove), CN105066194B (electromagnetic small stir-fry stove with magnetic induction gears).

[0005] That is: the heat dissipation of the coil is usually to set a blower at the bottom of the coil to blow air around the coil; the heat dissipation of the movement is to set the strong electricity unit of the movement on a heat dissipation plate, and then set one or two blowers on the movement to blow or exhaust air from the heat dissipation plate; then a suction fan is set on the furnace wall to extract the hot air in the furnace body.

[0006] The existing above heat dissipation method has the following defects:

[0007] 1. The coil blower blows air from the bottom of the coil to the periphery of the coil, and the hot air after passing through the coil is still inside the furnace body, affecting the heat dissipation of the coil.

[0008] 2. The movement and the coil dissipate heat independently, and each requires an independent blower. In addition, at least one blower is required on the furnace wall. Therefore, at least three blowers are required for the heat dissipation of the entire heating system.

[0009] 3. The coil and the movement are independent modules and need to be installed independently.

[0010] Regarding simplifying the heat dissipation structure, reducing the number of fans, and reducing the mutual influence of coil and movement heat dissipation to improve the heat dissipation efficiency, the following heat dissipation methods still exist in the prior art:

[0011] 1. The heat dissipation method disclosed in CN201314603Y (a cooling and exhaust structure for a high-power induction cooker): By configuring independent air ducts for the coil and the movement, the number of fans is reduced to two. Although the number of fans is reduced compared to the conventional heat dissipation mechanism, the heat dissipation structure is still relatively complex.

[0012] 2. The heat dissipation method disclosed in CN205227431U (a three-phase high-power induction cooker heat dissipation device): By connecting the air ducts of the movement and the coil, and then installing a fan in the air duct between the movement and the coil, the cold air first passes through the movement and then through the coil. Although the number of fans is reduced, the heat dissipation efficiency of the coil will be affected.

[0013] 3. The heat dissipation method disclosed in CN201335429Y (an integrated high-power commercial induction cooker): It is similar to the heat dissipation method of CN205227431U. By setting a fan between the movement and the coil, the cold air dissipates heat from the movement in sequence and then blows towards the coil to dissipate heat from the coil. The difference is that the movement is hoisted at the bottom of the coil to form an integral body with the coil. This structure not only has low heat dissipation efficiency but also the movement is relatively heavy.

[0014] In addition, there are also some high-power induction cookers, such as: CN204478196U (a heat dissipation structure for a commercial induction cooker), CN202032633U (a double heat dissipation channel embedded induction cooker), CN201606924U (an integrated induction cooker module), CN201721019054 (a heat dissipation mechanism for a cooking appliance). Most of them are tabletop or embedded induction cookers. Compared with cabinet-mounted large stir-fry stoves or small stir-fry stoves, their power is relatively small. Their heat dissipation method is similar to that of household induction cookers, and it is sufficient to blow or exhaust air as a whole to the coil and power components through the fan set on the stove body, which is quite different from the heat dissipation method of cabinet-mounted large stir-fry stoves or small stir-fry stoves. Summary of the Invention

[0015] One of the purposes of the present invention is to provide a high-power electromagnetic induction heating system, especially applicable to cabinet-mounted high-power induction cookers. By improving the structure and heat dissipation method of the heating system, the improved heating system has higher heat dissipation efficiency, simpler structure, and more convenient installation.

[0016] The content of the present invention is as follows:

[0017] The electromagnetic induction heating system of the present invention includes a coil module and a movement module;

[0018] The coil module includes a coil fixing bracket, a coil fixed on the coil fixing bracket, and an air extraction plate located below the coil;

[0019] The movement module includes a movement housing and an inner movement circuit board, power devices, and a radiator disposed in the movement housing. The movement housing is further provided with a radiator air inlet, the radiator is disposed at the radiator air inlet, the movement housing is further provided with an air outlet, and an air extraction device is disposed at the air outlet;

[0020] The air extraction plate is provided with an air outlet, the movement housing is further provided with an air inlet, and the air outlet on the air extraction plate is communicated with the air inlet on the movement housing through a pipeline, so that when the air extraction device extracts air from the inside of the movement housing, the coil can be simultaneously extracted.

[0021] In the present invention: the movement housing includes a bottom plate and an upper cover. The movement circuit board, power devices, and radiator are all disposed on the bottom plate and are located at positions on the bottom plate that can avoid the air inlet, so that the hot air drawn from the coil module can be directly discharged by the air extraction device without affecting the heat dissipation of other components inside the movement housing.

[0022] In the present invention: the air inlet of the movement housing is disposed on the upper cover and is directly below the air outlet of the air extraction plate.

[0023] In the present invention: the air extraction device is located on the bottom plate and is directly below the air inlet of the movement housing.

[0024] In the present invention: the air outlet of the air extraction plate is disposed at the center of the bottom or on the side of the center of the bottom of the air extraction plate.

[0025] In the present invention: there is a certain gap between the edge of the air extraction plate and the edge of the coil mounting bracket, and the gap is used to form the air inlet of the air extraction plate.

[0026] In the present invention: the radiator is a heat pipe radiator.

[0027] In the present invention: the heat pipe radiator includes a heat pipe, heat sinks mounted at both ends of the heat pipe, and a heat dissipation plate located in the middle section of the heat pipe. The heat sinks are placed at the radiator air inlet of the movement housing.

[0028] In the present invention: the power devices include IGBT elements and a rectifier bridge, and the IGBT elements and the rectifier bridge are disposed on the heat dissipation plate.

[0029] A second object of the present invention is also to provide a high-power induction cooker, which includes a cooker body and the above heating system. The coil module of the heating system is installed on the panel of the cooker body, and the movement module of the heating system is installed on the bottom plate of the cooker body. Ventilation openings are provided on the bottom plate of the cooker body corresponding to the air inlet of the radiator of the movement housing and the air outlet on the movement housing.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] 1. The heating system of the present invention uses an air extraction method for heat dissipation. Cold air is respectively drawn through the coil and the movement and then discharged by the air extraction device. Therefore, compared with the heat dissipation method of bottom blowing in the prior art, the heat dissipation efficiency of the heating system of the present invention is greatly improved, and at the same time, the temperature inside the cooker is reduced.

[0032] 2. Since the heating system of the present invention can simultaneously extract air from the coil and the movement through a set of air extraction devices, the number of air extraction devices is reduced, and no additional air extraction devices need to be provided on the cooker body. Therefore, for the induction cooker applying the heating system of the present invention, only one fan is required.

[0033] 3. In the present invention, the heating elements located inside the movement housing are installed at positions that can avoid the air inlet. Therefore, when the fan is started, the hot air drawn from the coil module will not affect the heat dissipation of the heating elements inside the movement, and thus the heat dissipation efficiency of the entire heating system is also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is an exploded schematic view of the heating system of the present invention.

[0035] Figure 2 is a schematic structural view of the cooker body of the induction cooker of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0036] Next, in combination with the drawings and the specific embodiments, the present invention will be further described:

[0037] As Figure 1 shown, the heating system of the present invention is composed of a coil module 1 and a movement module 2. Among them, the coil module 1 includes a coil mounting bracket 101, an air extraction plate 102, and a coil (not shown in the figure). The coil is installed on the coil mounting bracket 101. The air extraction plate 102 is located below the coil and is assembled with the coil mounting bracket 101 as a whole. There is a certain gap between the edge of the air extraction plate 102 and the edge of the coil mounting bracket 101. The gap is used to form the air inlet of the air extraction plate, and there is also an air outlet at the center of the bottom of the air extraction plate 102.

[0038] The movement module 2 includes a bottom plate 201, an upper cover 202, a power device, a movement circuit board, and a radiator 203 located on the bottom plate 201. The movement circuit board is located in a movement circuit board box 205. An air inlet 204 is formed on the upper cover 202, and the air inlet 204 is communicated with an air outlet at the center of the bottom of the air extraction plate 102 through a pipe 4.

[0039] Wherein, ventilation openings are provided on the left and right sides at the front end of the bottom plate 201, and the heat dissipation fins of the radiator 203 are placed on the ventilation openings, and the ventilation openings are located directly below the heat dissipation fins. An air exhaust opening is also provided at the rear end of the bottom plate 201, and a fan 3 is provided at a position above the air exhaust opening. The fan 3 is also located directly below the air inlet 204. In order to enable the fan 3 to have a better air extraction effect on both the movement and the coil, the fan 3 is inclined. In order to avoid the influence of the hot air drawn from the coil on the heating elements in the movement, the elements in the movement except the fan are installed at positions that can avoid the air inlet 204.

[0040] In the present invention, the radiator 203 includes a plurality of heat pipes, heat dissipation fins installed at both ends of the heat pipes, and a heat dissipation plate located in the middle section of the heat pipes. The IGBT elements and rectifier bridges in the power device are installed on the heat dissipation plate. The heat pipe radiator adopted in the present invention has a heat exchange working medium and a capillary structure inside, and the heat exchange working medium circulates in its capillary structure to take away the heat generated by the above-mentioned heating elements. The heat dissipation plate is installed at the evaporation section of the heat pipe radiator, and the heat dissipation fins are installed at the condensation section of the heat pipe radiator. These heat dissipation fins are located at the ventilation opening 51, and the heat exchange working medium flows back to the evaporation section after being cooled at the condensation section. Since the heat pipe radiator has the advantages of fast heat transfer and high heat dissipation efficiency, the adoption of the heat pipe radiator can improve the heat dissipation efficiency and reduce the weight of the movement module.

[0041] As Figure 2 shown, a ventilation opening 51 is provided at the bottom plate of the furnace body 5 corresponding to the air inlet of the radiator, and a ventilation opening 52 is provided at a position corresponding to the air exhaust opening of the fan 3. The cookware 6 is located on the furnace body panel, and the heating system is located below the cookware 6. Among them, the coil module 1 is located below the cookware 6, and the movement module 2 is installed on the bottom plate of the furnace body. The furnace body structure shown in the figure is only a specific application mode of the heating system of the present invention. It can be imagined that the heating system of the present invention can also be applied to other similar furnace bodies to form various different forms of induction cookers.

[0042] For those skilled in the art, various corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims

1. An electromagnetic induction heating system, characterized in that: It includes a coil module and a movement module; The coil module includes a coil fixing bracket, a coil fixed on the coil fixing bracket, and an air extraction plate located below the coil; The movement module includes a movement housing, a movement circuit board, a power device, and a radiator disposed within the movement housing. The movement housing is further provided with a radiator air inlet, the radiator is disposed at the radiator air inlet, the movement housing is further provided with an air outlet, and an air extraction device is disposed at the air outlet; An air outlet is provided on the air extraction plate, and an air inlet is further provided on the movement housing. The air outlet on the air extraction plate is communicated with the air inlet on the movement housing through a pipeline, so that the air extraction device can extract air from the coil while extracting air from the interior of the movement housing; The movement housing includes a bottom plate and an upper cover. The movement circuit board, the power device, and the radiator are all disposed on the bottom plate and at a position on the bottom plate that can avoid the air inlet, so that the hot air drawn from the coil module can be directly discharged by the air extraction device without affecting the heat dissipation of other components within the movement housing; The air outlet of the air extraction plate is disposed at the center of the bottom or the side position of the center of the bottom of the air extraction plate; There is a certain gap between the edge of the air extraction plate and the edge of the coil mounting bracket, and the gap is used to form the air inlet of the air extraction plate.

2. The heating system according to claim 1, characterized in that: The air inlet of the movement housing is disposed on the upper cover and directly below the air outlet of the air extraction plate.

3. The heating system according to claim 2, wherein: The air extraction device is located on the bottom plate and directly below the air inlet of the movement housing.

4. The heating system according to claim 1, wherein: The radiator is a heat pipe radiator.

5. The heating system according to claim 4, wherein: The heat pipe radiator includes heat pipes, heat dissipation fins mounted at both ends of the heat pipes, and a heat dissipation plate located in the middle section of the heat pipes. The heat dissipation fins are placed at the radiator air inlet of the movement housing.

6. The heating system according to claim 5, characterized in that: The power device includes an IGBT element and a rectifier bridge, and the IGBT element and the rectifier bridge are disposed on the heat dissipation plate.

7. Induction cooker, characterized in that: It includes a furnace body and a heating system as described in any one of claims 1-6. The coil module of the heating system is installed on the panel of the furnace body, the movement module of the heating system is installed on the bottom plate of the furnace body, and ventilation openings are provided on the bottom plate of the furnace body corresponding to the radiator air inlet of the movement housing and the air outlet on the movement housing.

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