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 coil and a movement; the movement includes a movement housing and power devices arranged on the movement housing, and a blower is further arranged on the movement housing; a first air extraction channel for extracting air from the coil and a second air extraction channel for extracting air from the power devices are formed on the movement housing. The first air extraction channel and the second air extraction channel are separated from each other on the movement housing to form independent channels, and both the first air extraction channel and the second air extraction channel converge to the blower, so that the blower can extract air from the coil and the power devices simultaneously. By improving the structure and heat dissipation mode of the heating system, the improved structure of the present invention 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 and an induction cooker of a high-power 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, government agencies, military units, 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, and the weak electricity unit is mainly a main control integrated circuit board (see CN103582195A, a 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 frying stove), CN204478185U (commercial large frying stove), CN206094209U (electromagnetic large frying stove), CN202350122U (electromagnetic small frying stove), CN204478184U (electromagnetic commercial small frying stove), CN203949228U (electromagnetic small frying stove), CN105066194B (electromagnetic small frying 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 the heat dissipation plate, and then set one or two blowers on the movement to blow or extract 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] Around 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, it will affect the heat dissipation efficiency of the coil.

[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 bulky.

[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 the cabinet-mounted large stir-fry stove or small stir-fry stove, their power is relatively small. Their heat dissipation method is similar to that of a household induction cooker, and it is sufficient to blow or extract air from the coil and power components as a whole through the fan set on the stove body, which is quite different from the heat dissipation method of the cabinet-mounted large stir-fry stove or small stir-fry stove. Summary of the Invention

[0015] The purpose of the present invention is to provide a high-power electromagnetic induction heating system, especially applicable to a cabinet-mounted high-power induction cooker, which improves the heat dissipation efficiency, simplifies the structure, and makes the installation simpler and more convenient by improving the structure and heat dissipation method of the heating system.

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

[0017] An electromagnetic induction heating system, comprising a coil and a movement;

[0018] The movement includes a movement housing and power devices disposed on the movement housing, and a blower is also disposed on the movement housing;

[0019] A first air extraction channel for extracting air from the coil and a second air extraction channel for extracting air from the power devices are formed on the movement housing. The first air extraction channel and the second air extraction channel are separated from each other on the movement housing to form independent channels, and both the first air extraction channel and the second air extraction channel converge to the blower, so that the blower can extract air from the coil and the power devices simultaneously.

[0020] It should be emphasized that when installing the blower, it can also be installed reversely. At this time, the blower can blow air into the first air extraction channel and the second air extraction channel, thus becoming a blowing type heat dissipation. At this time, as an optimization, a device for guiding the blown hot air can be installed at the air outlet of the coil. Therefore, in conclusion, whether the blower is installed normally or reversely is within the protection scope of the present invention.

[0021] In the present invention: an air extraction plate for extracting air from the coil is disposed below the coil, and an air outlet is disposed on the air extraction plate. Among them, the air inlet of the first air extraction channel is connected to the air outlet of the air extraction plate.

[0022] In the present invention: an air inlet is disposed at one or more of the bottom center of the air extraction plate, or around the bottom center, or the periphery between the coil and the air extraction plate.

[0023] In the present invention: the movement housing includes a movement upper cover and a movement bottom case. The movement upper cover separates the first air extraction channel and the second air extraction channel through two partition plates. Among them, the air extraction channel formed between the partition plates is the first air extraction channel, and the air extraction channels on both sides of the partition plates are the second air extraction channels. The air inlet of the first air extraction channel is located on the movement upper cover, and the air inlets of the second air extraction channels are located on the left and right sides of the movement bottom case.

[0024] In the present invention: a radiator for dissipating heat from the power devices is further disposed on the movement housing. Among them, the radiator is a heat pipe radiator, and the heat pipe radiator is disposed at the air inlet of the second air extraction channel.

[0025] In the present invention: the power devices include IGBT elements, a rectifier bridge, and movement component capacitors. Among them, the IGBT elements and the rectifier bridge are installed on the heat pipe radiator, and the movement component capacitors are installed on the movement upper cover or the bottom case.

[0026] In the present invention: A motherboard is further provided inside the movement housing. A motherboard mounting groove and a motherboard mounting groove cover are provided on the bottom case of the movement. The motherboard mounting groove cover encapsulates the motherboard in the motherboard mounting groove. The motherboard is mounted at the bottom of the movement or at the outermost position below the outer side of the movement, away from the periphery of the coil.

[0027] The present invention further relates to an induction cooker. The induction cooker of the present invention includes the above heating system, and the induction cooker further includes a cookware and a stove body. A heat insulation layer is further provided below the cookware. The coil is located below the heat insulation layer. An air inlet is provided on the stove body, and an air outlet is provided at a position on the stove body facing the blower.

[0028] Furthermore: The movement and the coil are installed together. A screw fixing position for fixing the movement or a hoisting position for a hardware part is provided at one end of the movement. The other end of the movement is hoisted on the cookware or the stove body through a hardware part or fixed on the original hardware hanging parts of the coil and the cookware.

[0029] Alternatively, the movement and the coil are installed separately. The movement is installed on the back panel or the bottom panel of the stove body. The first air extraction channel on the movement housing is connected to the coil through an air duct.

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

[0031] 1. For the heating system of the present invention, heat dissipation is carried out by means of air extraction. The cold air outside the stove body is drawn into the stove body and then passes through the coil and the movement respectively and is then discharged by the blower. Therefore, compared with the heat dissipation method by 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 stove is reduced.

[0032] 2. Since the heating system of the present invention can simultaneously extract air from the coil and the movement through a single blower, the number of blowers is reduced. When an air outlet is provided at the position of the stove body facing the blower, no additional blower needs to be provided on the stove body. Therefore, for the induction cooker applying the heating system of the present invention, only one blower is required.

[0033] 3. The first air extraction channel and the second air extraction channel of the present invention are independent air extraction channels. Therefore, the heat dissipation between the movement and the coil is independent of each other and does not affect each other. Therefore, the heat dissipation efficiency of the entire heating system is also improved.

[0034] 4. The movement module of the heating system of the present invention can be combined with the coil module to form a whole, and then welded to the cookware or the stove body panel through hardware parts, which is more convenient for installation. At the same time, hoisting the movement has better waterproof performance compared with mounting the movement on the bottom panel of the stove body in the prior art.

[0035] 5. It should be particularly emphasized that for the heating system of the present invention, the heat sink used in its movement is a heat pipe heat sink. The main heating elements on the movement, such as IGBT elements and rectifier bridge elements, are installed on this heat pipe heat sink. The heat pipe heat sink mentioned in the present invention has a heat transfer working medium and a capillary structure inside. The heat transfer working medium circulates in its capillary structure to take away the heat generated by the above-mentioned heating elements. The above-mentioned heating elements are installed on the evaporation section of the heat pipe heat sink. A number of heat sinks are provided on the condensation section of the heat pipe heat sink, and these heat sinks are at the air inlet of the second air extraction channel. The heat transfer working medium is cooled after passing through the condensation section and then flows back to the evaporation section. Although the heat pipe heat sink is a very mature technology, its cost is relatively high. Although there are introductions in existing patent documents about applying the heat pipe heat sink to low-power induction cookers, in practice, there are almost no corresponding products on the market.

[0036] Due to the advantages of fast heat transfer and high heat dissipation efficiency of the heat pipe heat sink, applying it to a high-power induction cooker can greatly reduce the weight of the heat sink, at least reducing it by more than half. And reducing the weight is very helpful for the safety of the movement during hoisting and dropping. Therefore, the present invention first applies the heat pipe heat sink to the movement of a high-power induction cooker.

[0037] 6. By installing the movement main board and different power elements at corresponding positions on the movement housing, the present invention makes the structure of the movement more reasonable and the layout of the movement more optimized, thus combining the coil and the movement into a heating system. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the heating system of the present invention hoisted on a cooking utensil.

[0039] Figure 2 It is a schematic diagram of the partial structure of the induction cooker body of the present invention.

[0040] Figure 3 It is an exploded schematic diagram of the coil module of the present invention.

[0041] Figure 4 It is an exploded schematic diagram of the movement module of the present invention.

[0042] Figure 5 It is a schematic diagram of the structure of the upper cover of the movement of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0043] Next, in combination with the drawings and specific embodiments, the present invention will be further described:

[0044] As Figure 1As shown in the figure, 1 is the movement module, 2 is the coil module, 3 is the cookware, and 4 is the fan. In the figure, the movement module 1 is closely attached to the coil module 2, and both the movement module and the coil module are hoisted on the cookware by the hardware 5. It should be understood that the movement module and the coil module of this embodiment can also be hoisted under the furnace body panel by the hardware.

[0045] In the figure, the upper part of the movement module 1 is the movement upper cover 11, and the lower part is the movement bottom shell 12. The fan 4 is installed between the movement upper cover 11 and the movement bottom shell 12.

[0046] In the figure, the cookware is a concave cookware, but according to needs, the cookware of the present invention can also be a flat cookware.

[0047] As Figure 2 shown, an air outlet 61 is provided on the back of the furnace body 6. When the heating system of this embodiment is installed on the furnace body 6, the fan 4 is exactly located at the air outlet 61. During operation, the fan 4 can directly discharge the hot air in the coil and the movement through the air outlet 61.

[0048] As Figure 3 shown, the coil module 2 is composed of a coil mounting frame 21, a coil 22, and an air extraction plate 23. Among them, the coil 22 is installed on the coil mounting frame. A heat insulation layer can be provided on the upper surface of the coil mounting frame according to needs. The air extraction plate 23 covers the lower part of the coil 22. An air outlet 231 and several air inlets 232 are provided on the air extraction plate 23. It should be understood that there are various specific installation methods for the coil 22. According to needs, the coil 22 can be directly installed on the air extraction plate 23, thereby omitting the coil mounting frame 21 above the air extraction plate in the figure.

[0049] Figure 3 It is shown that the air inlets 232 are around the center of the bottom of the air extraction plate 23. In different embodiments, the air inlets 232 can also be at the center of the bottom of the air extraction plate 23 or around the center of the bottom or at one or more of the peripheries between the coil and the air extraction plate.

[0050] As Figure 4 shown, the movement module 1 includes a movement upper cover 11 and a movement bottom shell 12. An air inlet 1101 is provided at the center position of the arc surface of the movement upper cover 11 in contact with the air extraction plate. The fan 4 is facing the air inlet 1101, and the air extraction channel between the fan 4 and the air inlet is the first air extraction channel.

[0051] The air inlet 1101 is directly docked with the air outlet 231 on the air extraction plate. In other embodiments, if the movement module is installed on the furnace body and the air inlet 1101 cannot be directly docked with the air outlet 231 on the air extraction plate, it can be connected through an air duct. An element capacitor installation box 1102 is also provided on the movement upper cover 11, and the element capacitor 1103 is installed in the installation box 1102.

[0052] As shown in the figure, air inlets 1201 are provided on the left and right sides of the movement bottom case 12. The radiator 13 is installed between the movement upper cover 11 and the movement bottom case 12. The radiator is a heat pipe radiator. As shown in the figure, four heat pipes 1301 are provided on the radiator 13. The middle part of the heat pipe is the evaporation section, which is clamped by two aluminum plates 1302. The two ends of the heat pipe are the condensation sections, and a number of heat sinks 1303 are inserted on the condensation sections. The heat sinks 1303 are exactly arranged at the air inlets 1201. When the fan 4 is started, the cold air passes through the heat sinks 1303 and then reaches the fan through the second air extraction channel 17.

[0053] A movement main board installation groove and a movement main board installation groove cover 15 are further provided at the rear end of the movement bottom case 12, and the movement main board installation groove cover 15 encapsulates the movement main board 14 in the movement main board installation groove.

[0054] The IGBT element and the rectifier bridge are arranged on the aluminum plate 1302, on the lower aluminum plate in the figure, so they are not shown in the figure. The IGBT element (Insulated Gate Bipolar Transistor) described in the present invention, that is, the insulated gate bipolar transistor, is a common semiconductor power device.

[0055] As Figure 5 shown, partition plates 1102 are provided on both sides of the air inlet 1101 of the movement upper cover 11. The space between the partition plates 1102 is the first air extraction channel 16, and the two sides of the partition plates are the second air extraction channels 17. The first and second in the first air extraction channel and the second air extraction channel in the present invention are only for distinction and there is no limit on the quantity. Certainly, under the concept of the present invention, the positions and quantities of the first air extraction channel and the second air extraction channel can be adjusted appropriately according to needs. Similarly, according to needs, 2 or more fans can also be installed at the position where the fan 4 is installed in the figure, which also belongs to the inventive concept of the present invention, so it is also within the protection scope of the present invention.

[0056] 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, comprising a coil and a movement; The movement includes a movement housing and power devices provided on the movement housing, and a blower is also provided on the movement housing; It is characterized in that: A first air extraction channel for extracting air from the coil and a second air extraction channel for extracting air from the power devices are formed on the movement housing. The first air extraction channel and the second air extraction channel are separated from each other on the movement housing to form independent channels. Both the first air extraction channel and the second air extraction channel converge to the blower, so that the blower can extract air from the coil and the power devices simultaneously; An air extraction plate for extracting air from the coil is provided below the coil, and an air outlet is provided on the air extraction plate. Among them, the air inlet of the first air extraction channel is connected to the air outlet of the air extraction plate; An air inlet is provided at one or more of the bottom center of the air extraction plate, or around the bottom center, or the periphery between the coil and the air extraction plate; The movement housing includes a movement upper cover and a movement bottom case. The movement upper cover separates the first air extraction channel and the second air extraction channel through two partition plates. Among them, the air extraction channel formed between the partition plates is the first air extraction channel, and the air extraction channels on both sides of the partition plates are the second air extraction channels. The air inlet of the first air extraction channel is located on the movement upper cover, and the air inlets of the second air extraction channels are located on the left and right sides of the movement bottom case.

2. The electromagnetic induction heating system according to claim 1, wherein: A radiator for dissipating heat from the power devices is also provided on the movement housing. Among them, the radiator is a heat pipe radiator, and the heat pipe radiator is provided at the air inlet of the second air extraction channel.

3. The electromagnetic induction heating system according to claim 2, wherein: The power devices include IGBT elements, a rectifier bridge, and movement element capacitors. Among them, the IGBT elements and the rectifier bridge are installed on the heat pipe radiator, and the movement element capacitors are installed on the movement upper cover or the bottom case.

4. The electromagnetic induction heating system according to claim 1, wherein: A movement main board is also provided inside the movement housing. A movement main board installation groove and a movement main board installation groove cover are provided on the movement bottom case. The movement main board installation groove cover encapsulates the movement main board in the movement main board installation groove. The movement main board is installed at the bottom of the movement or at the outer side below the movement, at the farthest distance from the periphery of the coil.

5. Induction cooker, characterized in that: Including the heating system according to any one of claims 1-4, the induction cooker further includes a cookware and a stove body. An insulation layer is also provided below the cookware. The coil is located below the insulation layer. An air inlet is provided on the stove body, and an air outlet is provided at a position on the stove body facing the blower.

6. The induction cooker according to claim 5, characterized in that: The movement and the coil are installed together. A screw fixing position for fixing the movement or a lifting position for a hardware part is provided at one end of the movement. The other end of the movement is lifted on the cookware or the stove body through a hardware part or fixed on the original hardware hanging parts of the coil and the cookware.

7. The induction cooker according to claim 5, characterized in that: The movement and the coil are installed separately. The movement is installed on the back panel or the bottom plate of the stove body. The first air extraction channel on the movement housing is connected to the coil through an air duct.

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