induction cooker

Abstract

The present invention provides an induction cooker, comprising a bottom shell (10) and a panel covering the bottom shell (10), wherein the bottom shell (10) and the panel enclose a receiving cavity, wherein a heat dissipation fan (40) and a circuit board (30) are arranged in the receiving cavity, and an air inlet hole (12) is provided on the bottom shell (10), and at least a part of the circuit board (30) extends to at least a part of the outer periphery of the heat dissipation fan (40) and forms an extension part (33). A first gap is provided between the extension part (33) and the bottom wall (11) of the bottom shell (10), and the first gap forms part or all of the air inlet of the heat dissipation fan (40). The present invention can effectively reduce the manufacturing difficulty of the induction cooker, increase the air intake of the heat dissipation fan, and thus optimize the heat dissipation and cooling effect of the induction cooker.

Description

Technical Field

[0001] The invention relates to the technical field of household appliances, and in particular to an induction cooker. Background Art

[0002] Induction cookers have the advantages of fast heating, no open flame, no smoke and dust, safety and convenience, and are increasingly favored and recognized by consumers.

[0003] The induction cooker includes a bottom shell, a panel covering the bottom shell, and an upper cover between the bottom shell and the panel. The three together form a housing chamber of the induction cooker. The housing chamber is generally provided with a heating element and a heat dissipation fan. The heating element generally includes a coil disk and a circuit board. The bottom shell is provided with an air inlet and an air outlet for connecting the housing chamber with the outside. When the induction cooker is working, the heat dissipation fan introduces the low-temperature airflow outside the housing chamber into the housing chamber through the air inlet. The low-temperature heat dissipation airflow flows to the location of the circuit board and the coil disk after passing through the heat dissipation fan, carrying the heat around the two, and then flows to the air outlet, and flows to the outside of the housing chamber through the air outlet, thereby carrying the heat in the housing chamber to the outside, realizing the heat dissipation and cooling of the induction cooker. An air guide plate is generally provided around the heat dissipation fan, and an air inlet of the heat dissipation fan is provided at the air guide plate. The heat dissipation airflow entering from the air inlet will reach the heat dissipation fan through the air inlet.

[0004] However, in the current induction cooker, the air guide plate around the heat dissipation fan is arranged on the bottom shell of the induction cooker, which makes the manufacturing mold structure of the bottom shell complicated and limits the structure and size of the air inlet, which not only increases the manufacturing difficulty of the induction cooker, but also reduces the air intake volume of the heat dissipation fan, thereby affecting the heat dissipation and cooling effect of the induction cooker. Summary of the invention

[0005] In order to solve at least one of the problems mentioned in the background technology, the present invention provides an induction cooker, which can effectively reduce the manufacturing difficulty of the induction cooker, increase the air intake volume of the heat dissipation fan, thereby optimizing the heat dissipation and cooling effect of the induction cooker, ensure the stability and efficiency of the induction cooker, and extend the service life of the induction cooker.

[0006] In order to achieve the above-mentioned purpose, the present invention provides an induction cooker, including a bottom shell and a panel covering the bottom shell, the bottom shell and the panel forming an accommodating cavity, a heat dissipation fan and a circuit board are arranged in the accommodating cavity, an air inlet hole is opened on the bottom shell, at least part of the circuit board extends to at least part of the periphery of the heat dissipation fan to form an extension portion.

[0007] A first gap is provided between the extension portion and the bottom wall of the bottom shell, and the first gap forms part or all of the air inlet of the heat dissipation fan.

[0008] The electromagnetic oven provided by the present invention extends at least part of the circuit board to at least part of the outer periphery of the heat dissipation fan and forms an extension part, and utilizes the first gap formed between the extension part and the bottom wall of the bottom shell as part or all of the air inlet of the heat dissipation fan. Compared with the prior art in which the air inlet structure is set in the bottom shell, the structure of the bottom shell is relatively complex, which increases the structural complexity of the mold used in the manufacturing process. The mold with a complex structure limits the structure and size of the air inlet, affecting the air intake of the heat dissipation fan. However, the extension part of the present application is located on the circuit board, and the circuit board structure and the bottom shell are independent of each other. Therefore, the mold manufacturing process is not affected by the bottom shell structure, which greatly reduces the manufacturing difficulty of the air inlet structure of the heat dissipation fan. Moreover, the structure and size of the air inlet formed by the extension part can be adjusted according to the structure of the heat dissipation fan, so the air inlet structure formed is relatively flexible, which increases the air intake of the heat dissipation fan, enhances the heat dissipation and cooling effect of the heat dissipation fan, ensures the stability and efficiency of the electromagnetic oven, and extends the service life of the electromagnetic oven.

[0009] In the above-mentioned induction cooker, optionally, the air inlet hole is arranged on the side wall of the bottom shell, the side wall of the bottom shell at least includes a first side wall section, a second side wall section, a third side wall section and a fourth side wall section connected in sequence, and the heat dissipation fan is arranged in the accommodating cavity near the connection between the first side wall section and the second side wall section.

[0010] The air inlet hole is arranged on at least a portion of the first side wall section and / or at least a portion of the second side wall section.

[0011] Such a setting can ensure that the air inlet is as close to the cooling fan as possible, which is conducive to the air flow from the air inlet to flow to the cooling fan, reducing the flow path of the air flow in the accommodating cavity, thereby increasing the air intake volume of the cooling fan and enhancing the heat dissipation effect on the heating elements in the induction cooker.

[0012] In the above-mentioned induction cooker, optionally, a side of the extension portion close to the heat dissipation fan has a first edge.

[0013] The first edge is arc-shaped, and the first edge surrounds at least a portion of the outer circumference of the heat dissipation fan. The arc-shaped first edge is concentrically arranged with the center of the heat dissipation fan.

[0014] And / or, the area of ​​the outer circumference of the heat dissipation fan surrounded by the first edge accounts for at least 1 / 3 of the entire outer circumference of the heat dissipation fan.

[0015] And / or, the central angle of the first edge is in the range of 50°-150°.

[0016] By setting the first edge of the extension portion to be arc-shaped, a structure surrounding the heat dissipation fan is formed, which is beneficial for gathering the incoming air flow to the heat dissipation fan and increasing the air intake volume of the heat dissipation fan.

[0017] In the above-mentioned induction cooker, optionally, the upper surface of the first edge is higher than the upper surface of the heat dissipation fan, and the lower surface of the first edge is located between the upper surface and the lower surface of the heat dissipation fan.

[0018] Such a setting allows the inlet air flow between the lower surface of the cooling fan and the bottom wall of the bottom shell to enter the cooling fan as much as possible, while ensuring that the outlet air flow on the upper surface of the cooling fan flows to the location of the heating element as much as possible, thereby optimizing the heat dissipation effect of the heating element.

[0019] And / or, the distance between the lower surface of the first edge and the upper surface of the heat dissipation fan is 30%-60% of the thickness of the heat dissipation fan.

[0020] And / or, the upper surface of the extension portion extends to the lower surface of the panel. Such an arrangement can prevent the airflow of the heat dissipation fan from leaking out, thereby ensuring the heat dissipation effect of the airflow on the heating element.

[0021] And / or, the lower surface of the extension portion is a plane, an inclined surface or an arc surface. Such a setting can ensure the smoothness of the incoming air flow, thereby optimizing the air intake process of the heat dissipation fan.

[0022] In the above induction cooker, optionally, the thickness of the first edge ranges from 10 to 25 mm.

[0023] And / or, the first edge is provided with a first flange, an end of the first flange extends toward one side of the panel, and a height range of the first flange is 10-25 mm.

[0024] In the above-mentioned induction cooker, optionally, the extension portion has a second edge on a side away from the heat dissipation fan, and the second edge is arranged close to the second side wall section.

[0025] And / or, the second edge is a straight line.

[0026] And / or, the second edge is provided with a second flange, and an end of the second flange extends toward the panel.

[0027] By setting the second edge of the extension portion as a straight line, the second edge can be easily fitted to the second side wall segment, and the second flange on the second edge can protect the circuit board.

[0028] In the above-mentioned induction cooker, optionally, the circuit board includes a circuit board bracket and a circuit board body arranged above the circuit board bracket, and the circuit board bracket is located between at least a portion of the circuit board body and at least a portion of the air inlet hole.

[0029] At least a portion of the circuit board bracket extends to at least a portion of the outer periphery of the heat dissipation fan to form an extension portion.

[0030] By forming an extension portion of at least a portion of the circuit board bracket, the circuit board bracket is used to support, install and protect the circuit board body, and the circuit board bracket is used to guide the air flow of the heat dissipation fan.

[0031] And / or, the circuit board bracket is a plastic part.

[0032] And / or, the lower surface of the circuit board bracket is a plane, an inclined surface or a curved surface.

[0033] And / or, at least one reinforcing rib is arranged on the circuit board bracket.

[0034] Such a configuration can improve the smoothness of the incoming airflow when it flows through the circuit board bracket, and increase the mechanical strength of the circuit board bracket.

[0035] In the above-mentioned induction cooker, optionally, the air inlet hole is arranged on the bottom wall and / or the side wall of the bottom shell.

[0036] And / or, the heat dissipation fan is an axial flow fan.

[0037] And / or, the heat dissipation fan includes a fan bracket and a fan body arranged on the fan bracket, and the fan bracket is located at the bottom of the fan body.

[0038] Such a setting can reduce the manufacturing cost of the heat dissipation fan, and at the same time prevent the heat dissipation fan from inhaling external water vapor and stains during operation, thereby ensuring the cleanliness of the accommodating cavity and the stability of the operation of the electronic components. By arranging the fan bracket of the heat dissipation fan at the bottom of the fan body, the fan bracket is prevented from blocking the outlet airflow of the heat dissipation fan, thereby ensuring that the outlet airflow flows to the heating element.

[0039] In the above-mentioned induction cooker, optionally, the panel includes an operating area and a heating area, and the air inlet is arranged on a side of the bottom shell close to the operating area.

[0040] And / or, the air inlet hole is arranged on the bottom wall of the bottom shell, and the air inlet hole is located outside the projection area of ​​the heat dissipation fan on the bottom wall of the bottom shell.

[0041] By arranging the air inlet hole outside the projection area of ​​the heat dissipation fan on the bottom wall of the bottom shell, the wind flow near the bottom wall is prevented from directly entering the accommodating cavity, thereby bringing in water vapor or stains at the bottom of the induction cooker, thereby ensuring the cleanliness of the accommodating cavity and improving the working stability of the electronic components.

[0042] In the above-mentioned induction cooker, optionally, a first air guide plate is provided in the accommodating cavity near the first side wall segment, a first end of the first air guide plate is connected to the fourth side wall segment, and a second end of the first air guide plate extends toward the heat dissipation fan.

[0043] In the above-mentioned induction cooker, optionally, the air inlet hole is arranged on the entire first side wall segment, and the circuit board bracket is arranged at the bottom of the entire circuit board body and is located between the circuit board body and the air inlet hole.

[0044] Such a configuration can increase the number of air inlet holes on the first side wall segment, thereby increasing the air flow rate of the incoming air. The circuit board bracket is located at the bottom of the entire circuit board body, which can improve the protection effect of the circuit board body.

[0045] Or, the air inlet is arranged on at least a portion of the first side wall segment, a fourth air guide plate is arranged between the first air guide plate and the first side wall segment, the first end of the fourth air guide plate is connected to the first side wall segment, and the second end of the fourth air guide plate is connected to the first air guide plate or an end of the extension portion close to the first air guide plate; the first air guide plate, the fourth air guide plate, a portion of the first side wall segment and a portion of the fourth side wall segment together form a cavity.

[0046] The air inlet is arranged on one side of the first side wall segment close to the heat dissipation fan and is located outside the cavity. The circuit board bracket is arranged at the bottom of the circuit board body close to the heat dissipation fan and is located between the circuit board body and the air inlet.

[0047] By arranging the air inlet hole on the side of the first side wall section close to the heat dissipation fan and outside the cavity, it is ensured that the incoming air flow can flow to the heat dissipation fan as quickly as possible, reducing the flow path of the incoming air flow in the accommodating cavity and reducing the loss of the incoming air flow.

[0048] In the above-mentioned induction cooker, optionally, a second air guide plate is provided on the side of the accommodating cavity close to the second side wall section, the first end of the second air guide plate is located on the side close to the heat dissipation fan, and the second end of the second air guide plate extends toward the third side wall section.

[0049] In the above-mentioned induction cooker, optionally, the second end of the second air guide plate is connected to a side of the second side wall segment away from the heat dissipation fan; or, the second end of the second air guide plate is connected to the third side wall segment; or, the second end of the second air guide plate is connected to the connection between the second side wall segment and the third side wall segment.

[0050] In the above-mentioned induction cooker, optionally, the air inlet holes are arranged on the entire second side wall segment. Such an arrangement can increase the number of air inlet holes on the second side wall segment, thereby increasing the air flow rate of the incoming air.

[0051] In the above-mentioned induction cooker, optionally, the air inlet hole is arranged on at least a portion of the second side wall section, and a third air guide plate is also arranged in the accommodating cavity, the first end of the third air guide plate extends toward the second side wall section, and the second end of the third air guide plate extends toward the first end of the second air guide plate.

[0052] And / or, the air inlet hole is arranged on a side of the second side wall segment close to the heat dissipation fan.

[0053] And / or, the air inlet hole is arranged on a side of the second side wall section close to the heat dissipation fan, and the air outlet hole on the bottom shell is arranged on a side of the second side wall section away from the heat dissipation fan.

[0054] By arranging the air inlet hole on the side of the second side wall section close to the heat dissipation fan, it is ensured that the incoming air flow can flow to the heat dissipation fan as quickly as possible, reducing the flow path of the incoming air flow in the accommodating cavity and reducing the loss of the incoming air flow. At the same time, the second air guide plate and the third air guide plate are used to guide the incoming air flow.

[0055] In the above-mentioned induction cooker, optionally, the first end of the third air guide plate is connected to the second side wall segment.

[0056] And / or, the second end of the third air guide plate is connected to the first end of the second air guide plate.

[0057] And / or, the third air guide plate is connected to an end of the extension portion away from the circuit board body. Such an arrangement can improve the flexibility of the installation of the third air guide plate and reduce the difficulty of assembling the induction cooker.

[0058] In the above-mentioned induction cooker, optionally, there is a second gap between the lower surface of the heat dissipation fan and the bottom wall of the bottom shell, and the second gap is connected to the air inlet and forms an air inlet part of the fan cavity of the heat dissipation fan.

[0059] There is a third gap between the upper surface of the heat dissipation fan and the panel, and the third gap is connected to the air outlet hole of the bottom shell and forms the air outlet of the fan cavity of the heat dissipation fan. Such a setting can make the heat dissipation fan form a wind flow mode of bottom air intake and top air outlet, thereby improving the heat dissipation fan's wind guidance effect.

[0060] In the above-mentioned induction cooker, optionally, there is a fourth gap between the circuit board bracket and the side wall of the bottom shell, and at least part of the circuit board bracket is provided with a third flange at one end close to the side wall of the bottom shell, and the end of the third flange extends toward the panel.

[0061] The height of the third flange is in the range of 10-25 mm.

[0062] By setting the fourth gap in the circuit board bracket and the side wall bracket of the bottom shell, the third flange is utilized to protect the circuit board body and guide the wind flow entering through the air inlet hole on the side wall of the bottom shell.

[0063] In the above-mentioned induction cooker, optionally, the first air guide plate and the second air guide plate are spaced apart in the accommodating cavity, the extending portion is located in the spacing area, and two ends of the extending portion are respectively abutted against the first air guide plate and the second air guide plate.

[0064] And / or, the end of the extension portion overlaps and abuts against at least a portion of the first air guide plate.

[0065] And / or, the end of the extension portion overlaps and abuts against at least a portion of the second air guide plate.

[0066] By respectively abutting and / or overlapping the two ends of the extension part with the first air guide plate and the second air guide plate, the stability of the extension part in the bottom shell can be improved, while avoiding air leakage and reducing air loss.

[0067] In the above-mentioned induction cooker, optionally, a first transition piece is provided between the first air guide plate and the extension portion, and the first air guide plate and the extension portion are abutted via the first transition piece.

[0068] The first transition piece is connected to the bottom wall of the bottom shell, and / or the first transition piece is connected to the first air guide plate, and / or the first transition piece is connected to a side of the extension portion close to the first air guide plate.

[0069] And / or, a second transition piece is provided between the second air guide plate and the extension portion, and the second air guide plate and the extension portion are abutted via the second transition piece.

[0070] The second transition piece is connected to the bottom wall of the bottom shell, and / or the second transition piece is connected to the second air guide plate, and / or the second transition piece is connected to a side of the extension portion close to the second air guide plate.

[0071] Using the first transition piece to connect the first air guide plate and the extension part, and using the second transition piece to connect the second air guide plate and the extension part can reduce the difficulty of connecting the extension part with the first air guide plate, the extension part and the second air guide plate, thereby reducing the difficulty of assembling the induction cooker.

[0072] In the above-mentioned induction cooker, optionally, a first air inlet area of ​​the heat dissipation fan is formed between the first air guide plate and at least a portion of the first side wall segment, and at least a portion of the circuit board is located in the first air inlet area.

[0073] A second air inlet area of ​​the heat dissipation fan is formed between the second air guide plate and at least a portion of the second side wall segment.

[0074] The first air inlet area and the second air inlet area are both in communication with the air inlet portion of the fan chamber of the heat dissipation fan.

[0075] Such a configuration facilitates the airflow in the first air inlet area and the second air inlet area to flow to the heat dissipation fan, and at the same time helps the airflow in the first air inlet area to dissipate heat and cool the circuit board located in the first air inlet area.

[0076] In the above-mentioned induction cooker, optionally, the circuit board is arranged in the accommodating cavity through a connecting component.

[0077] The connecting assembly includes at least one fixing column arranged in the bottom shell and at least one fixing hole arranged on the circuit board. When the circuit board is arranged in the bottom shell, the fixing columns are correspondingly penetrated by the fixing holes, and at least some of the fixing holes are located at the ends of the extension part.

[0078] And / or, the connecting assembly includes at least one connecting member disposed on the circuit board body, and when the circuit board is disposed in the bottom shell, the connecting member is connected to the bottom shell.

[0079] By setting the fixing column and the fixing hole, and using the fixing column to penetrate the fixing hole, the circuit board can be positioned and installed, and by setting the connecting piece, the circuit board can be fixed and installed.

[0080] In the above-mentioned induction cooker, optionally, a supporting assembly for supporting the circuit board is provided on the bottom shell, and the supporting assembly includes one or more of the following:

[0081] at least one first supporting rib, the first supporting rib being arranged on a surface of the first air guide plate close to the first side wall section;

[0082] at least one second supporting rib, the second supporting rib being arranged on a surface of the first side wall section close to the first air guide plate;

[0083] At least one third supporting rib is disposed on the outer peripheral wall of the fixing column.

[0084] By providing the above-mentioned supporting ribs in the bottom shell, the installation stability of the circuit board can be improved and the difficulty of the installation process can be reduced.

[0085] In the above-mentioned induction cooker, optionally, a distance between an upper surface of the extension portion and a lower surface of the panel is in a range of 0.5-1 mm.

[0086] In the above-mentioned induction cooker, optionally, the circuit board is a light board and / or a power board.

[0087] In the above-mentioned induction cooker, optionally, an upper cover is arranged between the bottom shell and the panel, a first wind shielding rib is arranged on the side of the upper cover close to the heat dissipation fan, and a second wind shielding rib is arranged on the side of the bottom shell close to the heat dissipation fan; the first wind shielding rib and the second wind shielding rib are both arranged around the heat dissipation fan.

[0088] There is a fifth gap between the first wind shielding rib and the bottom wall of the bottom shell, there is a sixth gap between the second wind shielding rib and the bottom wall of the bottom shell, and the first gap, the fifth gap and the sixth gap together constitute the air inlet of the heat dissipation fan.

[0089] Such an arrangement can improve the flexibility of the arrangement of the wind shield ribs at the air inlet, thereby reducing the complexity of assembling the induction cooker and increasing the air intake volume of the cooling fan.

[0090] The construction of the present invention as well as other objects and advantageous effects thereof will become more apparent through the description of the preferred embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0092] Figure 1 A schematic diagram of the structure of the accommodating cavity of the induction cooker provided in the first embodiment of the present invention;

[0093] Figure 2 A schematic diagram of the structure of the accommodating cavity of the induction cooker from which the circuit board body is taken out provided in the first embodiment of the present invention;

[0094] Figure 3 A schematic diagram of the structure in the accommodating cavity of an induction cooker for removing a circuit board provided in the first embodiment of the present invention;

[0095] Figure 4 A schematic diagram of the structure in the accommodating cavity of an induction cooker for removing a circuit board provided in the first embodiment of the present invention;

[0096] Figure 5 A schematic structural diagram of one side of a third flange of a circuit board bracket of an induction cooker provided in Embodiment 1 of the present invention;

[0097] Figure 6 A schematic structural diagram of a first flange side of a circuit board bracket of an induction cooker provided in Embodiment 1 of the present invention;

[0098] Figure 7 A schematic structural diagram of one side of the lower surface of a circuit board bracket of an induction cooker provided in Embodiment 1 of the present invention;

[0099] Figure 8 A schematic diagram of the structure of the accommodating cavity of the induction cooker from which the circuit board body is taken out provided in the second embodiment of the present invention;

[0100] Fig. 9 A schematic diagram of the structure of the accommodating cavity of an induction cooker for removing a circuit board provided in the second embodiment of the present invention;

[0101] Fig.10 A schematic structural diagram of one side of a third flange of a circuit board bracket of an induction cooker provided in the second embodiment of the present invention;

[0102] Fig.11A schematic structural diagram of a first flange side of a circuit board bracket of an induction cooker provided in the second embodiment of the present invention;

[0103] Fig.12 This is a schematic structural diagram of one side of the lower surface of a circuit board bracket of an induction cooker provided in Embodiment 2 of the present invention.

[0104] Description of reference numerals:

[0105] 10- bottom shell; 11- bottom wall; 12- air inlet; 13- air outlet; 14- first side wall section;

[0106] 141-first air guide plate; 15-second side wall section; 151-second air guide plate; 16-third side wall section;

[0107] 17-fourth side wall section; 18-third air guide plate; 19-fourth air guide plate; 20-upper cover; 30-circuit board; 31-circuit board bracket; 311-third flange; 312-reinforcement rib; 32-circuit board body; 33-extension portion; 331-first edge; 332-first flange; 333-second edge; 334-second flange;

[0108] 335-first transition piece; 336-second transition piece; 40-heat dissipation fan; 41-fan bracket;

[0109] 42-fan body; 50-connection assembly; 51-fixing hole; 52-fixing column; 53-connecting piece;

[0110] 60-support assembly; 61-first support rib; 62-second support rib; 63-third support rib;

[0111] 70-coil disk; 80-cavity; 90-power board. DETAILED DESCRIPTION

[0112] The inventor of the present invention has found in the actual research process that the air guide plates around the heat dissipation fan in the current induction cooker are all arranged on the bottom shell. Since other structural parts and electronic components need to be arranged on the bottom shell, the installation space is limited, resulting in the structure of the air guide plate needing to adapt to the installation space in the bottom shell, and cannot be adjusted according to the structure of the heat dissipation fan, which reduces the flexibility of the air guide plate structure. At the same time, the mold structure required for the air guide plate in the molding process on the bottom shell is also relatively complex. Since the air guide plate needs to simultaneously complete the molding of the air inlet on the air guide plate during the molding process, the molding of the air inlet is mainly completed by the inclined roof structure on the bottom shell mold. The size of the inclined roof structure is large, and the connection stability on the bottom shell mold as a whole is poor, which affects the size of the air inlet after molding, resulting in the design of the air inlet channel of the heat dissipation fan having great limitations, reducing the air intake of the heat dissipation fan, thereby affecting the heat dissipation and cooling effect of the induction cooker. Furthermore, the installation of other structural parts and electronic components on the bottom shell requires the mold inclined roof structure to avoid the installation space, which also affects the normal installation of other structural parts and electronic components in the induction cooker. Therefore, the assembly complexity of the induction cooker is increased, and the manufacturing efficiency of the induction cooker is reduced.

[0113] In view of this, the embodiment of the present invention extends at least part of the circuit board to at least part of the periphery of the heat dissipation fan and forms an extension part, and uses the first gap formed between the extension part and the bottom wall of the bottom shell as part or all of the air inlet of the heat dissipation fan. Compared with the prior art that sets the air inlet structure in the bottom shell, the extension part of the present application is located on the circuit board, the circuit board structure and the bottom shell structure are independent of each other, and the installation space of the circuit board structure is relatively ample, so the mold manufacturing process is not affected by the bottom shell structure, which greatly reduces the manufacturing difficulty of the heat dissipation fan air inlet structure, and avoids affecting the installation of structural parts and electronic components on the bottom shell. In addition, the structure and size of the air inlet formed by the extension part can be adjusted according to the structure of the heat dissipation fan, and the formed air inlet structure is more flexible, which increases the air intake of the heat dissipation fan, enhances the heat dissipation and cooling effect of the heat dissipation fan, ensures the stability and efficiency of the induction cooker, and extends the service life of the induction cooker.

[0114] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0115] Embodiment 1

[0116] Figure 1 This is a schematic diagram of the structure in the accommodating cavity of the induction cooker provided in the first embodiment of the present invention. Figure 2 This is a schematic diagram of the structure in the accommodating cavity of an induction cooker from which a circuit board body is removed provided in Embodiment 1 of the present invention. Figure 3 This is a schematic diagram of the structure in the accommodating cavity of an induction cooker for removing a circuit board provided in Embodiment 1 of the present invention. Figure 4 This is a schematic diagram of the structure in the accommodating cavity of an induction cooker for removing a circuit board provided in Embodiment 1 of the present invention. Figure 5 This is a schematic structural diagram of one side of the third flange of the circuit board bracket of the induction cooker provided in Embodiment 1 of the present invention. Figure 6 This is a schematic structural diagram of one side of a first flange of a circuit board bracket of an induction cooker provided in Embodiment 1 of the present invention. Figure 7 This is a schematic structural diagram of one side of the lower surface of a circuit board bracket of an induction cooker provided in Embodiment 1 of the present invention.

[0117] Reference Figures 1 to 7 As shown, the induction cooker provided in the first embodiment of the present invention includes a bottom shell 10 and a panel covering the bottom shell 10, the bottom shell 10 and the panel form a receiving cavity, an upper cover 20 is arranged between the bottom shell 10 and the panel, a heat dissipation fan 40 and a circuit board 30 are arranged in the receiving cavity, an air inlet hole 12 is opened on the bottom shell 10, at least a part of the circuit board 30 extends to at least a part of the periphery of the heat dissipation fan 40 and forms an extension portion 33.

[0118] A first gap is defined between the extension portion 33 and the bottom wall 11 of the bottom shell 10 , and the first gap forms a part or all of the air inlet of the heat dissipation fan 40 .

[0119] It should be noted that the panel cover provided in this embodiment is arranged on the bottom shell 10, and together with the bottom shell 10, it forms a housing cavity for arranging various structural parts and electronic components. The induction cooker can be a square structure as shown in the figure, or it can be an existing circular or other shaped induction cooker, and this embodiment does not limit this. The housing cavity is provided with electronic components such as a circuit board 30, a coil disk 70 and a heat dissipation fan 40. The circuit board 30 and the coil disk 70 will generate heat during operation, and therefore belong to the heating elements in the housing cavity. The bottom shell 10 is provided with an air inlet 12. When the heat dissipation fan 40 is working, it will generate negative pressure in the housing cavity, thereby guiding the low-temperature airflow outside the housing cavity to enter the housing cavity through the air inlet 12 and form an inlet airflow. At the same time, the heat dissipation fan 40 will further guide the incoming air flow to the location of the heating element, use the low-temperature incoming air flow to take away the heat around the heating element, and form a high-temperature outgoing air flow. The heat dissipation fan 40 drives the outgoing air flow to flow out to the outside of the accommodating cavity through the air outlet holes 13 on the bottom shell 10, thereby achieving the purpose of heat dissipation and cooling of the electronic components in the accommodating cavity.

[0120] In this embodiment, at least part of the circuit board 30 is extended to at least part of the periphery of the heat dissipation fan 40. The extended area is the extension part 33 of the circuit board 30. The air inlet of the heat dissipation fan 40 is formed by using the first gap between the extension part 33 and the bottom wall 11 of the bottom shell 10. Since the circuit board 30, the bottom shell 10 and the panel are all independent structures, the structure of the circuit board 30 is not affected by the structure of the bottom shell 10 and the panel. The installation space on the circuit board 30 is relatively sufficient, and the structure of the extension part 33 can be adjusted according to the structure of the heat dissipation fan 40. The extension part 33 is located at least part of the periphery of the heat dissipation fan 40, and plays a guiding role in the airflow entering the heat dissipation fan 40, ensuring that the incoming airflow flows to the heat dissipation fan 40 as much as possible, reducing the loss of the incoming airflow.

[0121] Furthermore, compared with the structure of the bottom case 10, the structure of the circuit board 30 is relatively simple, and when the circuit board 30 is manufactured by injection molding, the complexity of the mold structure can be greatly reduced. And since the air inlet is formed by the first gap, there is no need to set a sloping top structure similar to that on the bottom case 10 mold on the mold, which improves the stability of the mold structure and avoids affecting the structure and size of the air inlet.

[0122] It should be noted that in actual use, the shape and size of the first gap can be set according to the requirements of the installation height of the heat dissipation fan 40 and the installation space in the accommodating cavity, and this embodiment does not limit this. This can effectively improve the structural flexibility of the air inlet, thereby adapting to the structure of the heat dissipation fan 40.

[0123] It should be particularly pointed out that the bottom wall 11 of the bottom shell 10 referred to in the present embodiment can be the shell wall surface close to the bottom of the bottom shell 10, or it can be the shell wall surface close to the bottom and other structural parts arranged on the wall surface. For example, in order to prevent the magnetic field generated by the coil disk 70 from acting on the table surface of the magnetic conductive material on which the induction cooker is placed, a magnetic isolation aluminum plate is usually provided on the bottom wall 11, and the aluminum plate should also be incorporated into the protection range of the bottom wall 11 of the bottom shell 10 of the present application.

[0124] Specifically, the panel provided in this embodiment may include an operation area and a heating area, wherein the heating area may be located directly above the coil disk 70, so that the magnetic field generated by the coil disk 70 can act on the pot on the heating area. The operation area may be located on the side of the overall structure of the induction cooker close to the user, so that the user can input control instructions in the operation area and obtain the working status of the induction cooker.

[0125] As a feasible implementation, the air inlet 12 is arranged on the side of the bottom shell 10 close to the operation area. Since the pot is generally placed above the heating area, the soup in the pot will mainly remain on the placement surface below the heating area after it overflows. Therefore, the air inlet 12 is arranged on the bottom shell 10 close to the operation area, so that the air inlet 12 can be kept away from the retention area of ​​the overflowed soup, thereby preventing the air inlet 12 from carrying water vapor or stains on the placement surface into the accommodating cavity during the air intake process, which not only improves the cleanliness of the accommodating cavity and the user experience comfort, but also ensures the stability of the operation of various electronic components in the accommodating cavity.

[0126] Specifically, the air inlet 12 is disposed on the bottom wall 11 and / or the side wall of the bottom shell 10. The heat dissipation fan 40 may include a fan bracket 41 and a fan body 42 disposed on the fan bracket 41. The fan bracket 41 is located at the bottom of the fan body 42.

[0127] It should be noted that the heat dissipation fan 40 can be an axial flow fan. At present, the fans commonly used in induction cookers include axial flow fans and centrifugal fans. The reason why the axial flow fan is selected in this embodiment is that the structure of the centrifugal fan generally includes a shell, a fan bracket 41 arranged in the shell, and a fan body 42 arranged on the fan bracket 41. The axial flow fan only includes the fan bracket 41 and the fan body 42, so its structure is simpler than that of the centrifugal fan and the cost is lower. In addition, in this embodiment, the fan bracket 41 of the axial flow fan is arranged at the bottom of the fan body 42, so that the airflow at the top of the axial flow fan can be prevented from being blocked by the fan bracket 41, thereby improving the flow smoothness of the airflow.

[0128] As a feasible implementation manner, the air inlet hole 12 is disposed on the bottom wall 11 of the bottom shell 10 , and the air inlet hole 12 is located outside the projection area of ​​the heat dissipation fan 40 on the bottom wall 11 of the bottom shell 10 .

[0129] It should be noted that, in the present embodiment, the air inlet hole 12 is arranged on the bottom wall 11 of the bottom shell 10, so as to facilitate the axial flow fan to form a bottom air inlet mode. However, during the bottom air intake process, the incoming airflow will carry water vapor or stains at the bottom of the induction cooker into the accommodating cavity. To avoid this situation, in the present embodiment, the air inlet hole 12 is arranged outside the projection area of ​​the heat dissipation fan 40 on the bottom wall 11 of the bottom shell 10. In this way, during the process of the incoming airflow entering the accommodating cavity, it will pass through a curved path, thereby increasing the length of the flow path to reduce the water vapor or stains entering the accommodating cavity, ensuring the cleanliness of the accommodating cavity, and improving the working stability of the electronic components.

[0130] As another feasible embodiment, the air inlet 12 is arranged on the side wall of the bottom shell 10, and the side wall of the bottom shell 10 includes at least a first side wall section 14, a second side wall section 15, a third side wall section 16 and a fourth side wall section 17 which are connected in sequence, and the heat dissipation fan 40 is arranged in the accommodating cavity near the connection between the first side wall section 14 and the second side wall section 15.

[0131] The air inlet 12 is disposed on at least a portion of the first side wall section 14 and / or at least a portion of the second side wall section 15 .

[0132] It should be noted that the present embodiment takes the electromagnetic oven as a square as an example for explanation and drawing, which includes the above four side wall sections connected in sequence, and the adjacent side wall sections can be transitioned by an arc structure. The heat dissipation fan 40 is arranged at the connection between the first side wall section 14 and the second side wall section 15, that is, located in the corner area of ​​the entire accommodating cavity, so that the air flow flowing out of the heat dissipation fan 40 can be guaranteed to cover the entire accommodating cavity as much as possible, thereby facilitating the heat dissipation of multiple heating elements in the accommodating cavity. The air inlet 12 is arranged on at least part of the first side wall section 14 and / or at least part of the second side wall section 15 to ensure that the air inlet 12 is as close to the heat dissipation fan 40 as possible, reducing the flow path length of the air flow entering the air inlet 12 to the heat dissipation fan 40, thereby reducing the loss of the air flow during the flow, and facilitating the air flow of the air inlet 12 to flow to the heat dissipation fan 40 faster, thereby not only increasing the air intake of the heat dissipation fan 40, enhancing the heat dissipation effect of the heating element in the electromagnetic oven, but also improving the heat dissipation efficiency of the heating element.

[0133] Specifically, refer to Figures 5 to 7 As shown, the side of the extension portion 33 close to the heat dissipation fan 40 has a first edge 331. The first edge 331 is arc-shaped, and the first edge 331 surrounds at least part of the outer periphery of the heat dissipation fan 40. The arc-shaped first edge 331 is arranged concentrically with the center of the circle of the heat dissipation fan 40. The arc-shaped first edge 331 can effectively adapt to the arc-shaped outer periphery of the heat dissipation fan 40, thereby ensuring that the first edge 331 fits the outer periphery of the heat dissipation fan 40 and forms a surrounding state. The first edge 331 and the curvature of the arc outer periphery of the heat dissipation fan 40 are adapted to each other to improve the fit between the two, thereby ensuring that the extension portion 33 forms a gathering effect on the incoming air flow, reducing the loss of the incoming air flow at the outer periphery of the heat dissipation fan 40, thereby increasing the air volume of the incoming air flow entering the heat dissipation fan 40. In actual use, the curvature of the first edge 331 and the arc-shaped outer periphery of the heat dissipation fan 40 can be set as needed, and this embodiment does not limit this.

[0134] As a feasible implementation, the area of ​​the outer periphery of the heat dissipation fan 40 surrounded by the first edge 331 accounts for at least 1 / 3 of the entire outer periphery of the heat dissipation fan 40. The center angle of the first edge 331 may range from 50° to 150°. Based on the fact that the first edge 331 has a gathering effect on the incoming airflow, if the area of ​​the outer periphery of the heat dissipation fan 40 surrounded by the first edge 331 is too small, or the center angle of the first edge 331 is too small, the area of ​​the gathering effect of the first edge 331 is too small, and it is impossible to ensure that the loss of the incoming airflow around the outer periphery of the heat dissipation fan 40 is reduced. In actual use, the specific percentage value of the area of ​​the outer periphery of the heat dissipation fan 40 surrounded by the first edge 331 accounts for at least the entire outer periphery of the heat dissipation fan 40 and the specific value of the center angle of the first edge 331 can be selected within the above range as needed, and the specific percentage value and the specific value of the center angle are not limited in this embodiment.

[0135] Specifically, the upper surface of the first edge 331 is higher than the upper surface of the heat dissipation fan 40 , and the lower surface of the first edge 331 is located between the upper surface and the lower surface of the heat dissipation fan 40 .

[0136] It should be noted that, since the first edge 331 surrounds at least part of the periphery of the heat dissipation fan 40, the first edge 331 has a guiding effect on the wind flow around the heat dissipation fan 40. In the process of the wind flow passing through the heat dissipation fan 40, the inlet wind flow contacts the fan body 42 of the heat dissipation fan 40 through the lower surface of the heat dissipation fan 40, and flows out through the upper surface of the heat dissipation fan 40 to form the outlet wind flow. Therefore, the lower surface of the first edge 331 is located between the upper surface and the lower surface of the heat dissipation fan 40, which can guide the inlet wind flow around the heat dissipation fan 40, and at the same time increase the area of ​​the inlet wind flow entering the heat dissipation fan 40, thereby increasing the inlet wind flow rate; and the upper surface of the first edge 331 is higher than the upper surface of the heat dissipation fan 40, which can guide the outlet wind flow of the heat dissipation fan 40, reduce the leakage of the outlet wind flow around the fan, thereby reducing the loss of the outlet wind flow, and optimizing the heat dissipation effect of the outlet wind flow on the heating element.

[0137] Among them, optionally, the distance between the lower surface of the first edge 331 and the upper surface of the heat dissipation fan 40 is 30%-60% of the thickness of the heat dissipation fan 40. When the distance between the lower surface of the first edge 331 and the upper surface of the heat dissipation fan 40 accounts for too small a percentage of the thickness of the heat dissipation fan 40, the first edge 331 is located in the upper half of the heat dissipation fan 40, resulting in an excessively high overall height of the extension 33, thereby increasing the overall thickness of the induction cooker. When the distance between the lower surface of the first edge 331 and the upper surface of the heat dissipation fan 40 accounts for too large a percentage of the thickness of the heat dissipation fan 40, the first edge 331 is located in the lower half of the heat dissipation fan 40, resulting in an excessively small spacing between the extension 33 and the bottom wall 11 of the bottom shell 10, affecting the size of the air inlet and reducing the air flow rate of the air inlet. Therefore, in actual use, the user can select a specific percentage value of the distance between the lower surface of the first edge 331 and the upper surface of the heat dissipation fan 40 in the above range as needed, and this embodiment does not limit the specific value.

[0138] As a feasible implementation, the upper surface of the extension part 33 extends to the lower surface of the panel. Such a configuration can effectively reduce the distance between the upper surface of the extension part 33 and the lower surface of the panel, thereby preventing the outlet airflow at the top of the heat dissipation fan 40 from leaking out from the gap between the upper surface of the extension part 33 and the lower surface of the panel, reducing the loss of the outlet airflow, ensuring that the outlet airflow flows to the heating element as much as possible, and improving the heat dissipation effect on the heating element.

[0139] As an achievable implementation, the lower surface of the extension portion 33 is a plane, an inclined surface or an arc surface. The lower surface of the extension portion 33 is a plane, which can reduce the resistance of the incoming air flow, thereby increasing the flow rate of the incoming air flow and improving the heat dissipation efficiency. The lower surface of the extension portion 33 can also be an inclined surface or an arc surface, and the height of the lower surface of the extension portion 33 gradually decreases from the side close to the accommodating cavity to the side away from the accommodating cavity, which can increase the flow rate of the incoming air flow entering the accommodating cavity, thereby improving the heat dissipation effect. In actual use, the user can set the specific slope value when the lower surface of the extension portion 33 is an inclined surface, or the specific curvature value when it is an arc surface according to needs, and this embodiment does not limit this.

[0140] As an achievable implementation, the thickness of the first edge 331 is in the range of 10-25 mm. As an achievable implementation, the first edge 331 is provided with a first flange 332, the end of the first flange 332 extends toward one side of the panel, and the height of the first flange 332 is in the range of 10-25 mm. In this way, it can be ensured that one side of the first edge 331 has sufficient thickness, thereby guiding the incoming airflow.

[0141] Specifically, the side of the extension portion 33 away from the heat dissipation fan 40 has a second edge 333, and the second edge 333 is arranged close to the second side wall section 15. The second edge 333 can be a straight line. Since the second edge 333 is close to the second side wall section 15, the second edge 333 is arranged in a straight line, which can improve the fit between the second edge 333 and the second side wall section 15, improve the structural adaptability between the extension portion 33 and the bottom shell 10, and improve the stability of the setting of the extension portion 33.

[0142] The second edge 333 may be provided with a second flange 334, and the end of the second flange 334 extends toward the panel. Since the air inlet 12 may be provided on at least part of the second side wall section 15, the second flange 334 may protect the circuit board 30, and may block at least part of the water vapor, oil smoke or dust to a certain extent, thereby reducing the probability of water vapor, oil smoke or dust entering through the air inlet 12 and directly falling on the circuit board 30, thereby effectively protecting the circuit board 30. In addition, if someone extends a strip or rod-shaped conductor from the air inlet 12 into the bottom shell 10, due to the presence of the second flange 334, the conductor extending from the air inlet 12 will not easily touch the charged circuit board 30, thereby reducing the probability of the conductor extending from the air inlet 12 touching the circuit board 30 in the bottom shell 10 and causing electric shock to a certain extent, thereby improving safety.

[0143] Specifically, the circuit board 30 includes a circuit board bracket 31 and a circuit board body 32 disposed above the circuit board bracket 31 . The circuit board bracket 31 is located between at least a portion of the circuit board body 32 and at least a portion of the air inlet 12 .

[0144] At least a portion of the circuit board bracket 31 extends to at least a portion of the outer periphery of the heat dissipation fan 40 to form an extension portion 33 .

[0145] It should be noted that the circuit board bracket 31 can support, install and protect the circuit board body 32. Figure 5 As shown, the circuit board bracket 31 has a mounting plane, and the lower surface of the circuit board body 32 is arranged on the mounting plane to improve the stability of the installation and support of the circuit board body 32. The circuit board bracket 31 is located between at least part of the circuit board body 32 and at least part of the air inlet hole 12, which can prevent water vapor, oil smoke or dust outside the accommodating cavity from falling on the circuit board body 32 through the air inlet hole 12, and prevent external conductors from contacting the circuit board body 32 through the air inlet hole 12, thereby improving the safety and stability of the circuit board body 32 in use.

[0146] Since the circuit board body 32 is an independent structural component in the bottom shell 10, its structure is not affected by the bottom shell 10 and the panel. Therefore, at least part of the circuit board body 32 is formed into an extension portion 33, which can improve the flexibility of the extension portion 33 structure and ensure the adaptability of the extension portion 33 to the periphery of the heat dissipation fan 40.

[0147] As a feasible implementation, the circuit board bracket 31 is a plastic part. Such a setting can manufacture the circuit board bracket 31 by injection molding. Since the circuit board bracket 31 includes an extension portion 33, its structure is irregular. Injection molding can reduce the difficulty of manufacturing the irregular circuit board bracket 31. In addition, the plastic part is generally made of insulating material, which can reduce the impact on the working process of the electronic components on the circuit board body 32 and avoid the problem of short circuit or electromagnetic interference.

[0148] As a feasible implementation, the lower surface of the circuit board bracket 31 is a plane, a slope or a curved surface. Since the circuit board 30 is located between at least part of the air inlet 12 and the heat dissipation fan 40, the lower surface of the circuit board bracket 31 is a plane, which reduces the resistance of the incoming air flow, thereby increasing the flow rate of the incoming air flow and improving the heat dissipation efficiency. The lower surface of the circuit board bracket 31 can also be a slope or a curved surface, and the height of the lower surface of the circuit board bracket 31 gradually decreases from the side close to the accommodating cavity to the side away from the accommodating cavity, which can increase the flow rate of the incoming air flow entering the accommodating cavity, thereby improving the heat dissipation effect. In actual use, the user can set the specific slope value when the lower surface of the circuit board bracket 31 is a slope, or the specific curvature value when it is a curved surface according to needs, and this embodiment does not limit this.

[0149] As a feasible implementation, at least one reinforcing rib 312 is provided on the circuit board bracket 31 to increase the mechanical strength of the circuit board bracket 31 and improve the stability of supporting the circuit board body 32. The specific structure and number of the reinforcing rib 312 can be set as needed, and this embodiment does not limit this.

[0150] Among them, refer to Figure 2 and Figure 3 As shown, a first air guide plate 141 is disposed in the accommodating cavity near the first side wall section 14 , a first end of the first air guide plate 141 is connected to the fourth side wall section 17 , and a second end of the first air guide plate 141 extends toward the heat dissipation fan 40 .

[0151] The air inlet hole 12 is arranged on at least a portion of the first side wall section 14, and a fourth air guide plate 19 is arranged between the first air guide plate 141 and the first side wall section 14, the first end of the fourth air guide plate 19 is connected to the first side wall section 14, and the second end of the fourth air guide plate 19 is connected to the first air guide plate 141 or an end of the extension portion 33 close to the first air guide plate 141; the first air guide plate 141, the fourth air guide plate 19, a portion of the first side wall section 14 and a portion of the fourth side wall section 17 together form a cavity 80.

[0152] The air inlet hole 12 is arranged on the side of the first side wall section 14 close to the heat dissipation fan 40 and is located outside the cavity 80. The circuit board bracket 31 is arranged at the bottom of the side of the circuit board body 32 close to the heat dissipation fan 40 and is located between the circuit board body 32 and the air inlet hole 12.

[0153] It should be noted that the cavity 80 is enclosed by the first air guide plate 141, the fourth air guide plate 19, part of the first side wall section 14 and part of the fourth side wall section 17. The cavity 80 can be a closed cavity 80 or a semi-closed cavity 80. The first end of the fourth air guide plate 19 is connected to the middle section of the first side wall section 14. The air inlet 12 is located on the side of the first side wall section 14 away from the cavity 80. The area where the air inlet 12 is set is separated from the cavity 80 by the fourth air guide plate 19, and there is no gas convection between the two. Such a setting can ensure that the airflow entering the air inlet 12 flows directly to the heat dissipation fan 40, avoiding the airflow flowing into the cavity 80, thereby reducing the length of the flow path of the airflow in the accommodating cavity and reducing the loss of the airflow.

[0154] In this case, the circuit board bracket 31 is only located at the bottom of part of the circuit board body 32, and the circuit board body 32 can extend into the cavity 80 area. However, the circuit board body 32 located in the cavity 80 area is not affected by the air inlet 12, so the circuit board bracket 31 is not set here, which can effectively reduce the manufacturing cost and weight of the induction cooker.

[0155] In actual use, the specific position of the connection point between the fourth air guide plate 19 and the first side wall section 14 in the middle section of the first side wall section 14 can be set according to actual needs, and this embodiment does not limit this. Further, the fourth air guide plate 19 can also support the circuit board 30.

[0156] Specifically, a second air guide plate 151 is provided on a side of the accommodating cavity close to the second side wall section 15 , a first end of the second air guide plate 151 is located on a side close to the heat dissipation fan 40 , and a second end of the second air guide plate 151 extends toward the third side wall section 16 .

[0157] Among them, the second end of the second air guide plate 151 is connected to the side of the second side wall section 15 away from the heat dissipation fan 40; or, the second end of the second air guide plate 151 is connected to the third side wall section 16; or, the second end of the second air guide plate 151 is connected to the connection between the second side wall section 15 and the third side wall section 16.

[0158] As a feasible implementation, the air inlet holes 12 are arranged on the entire second side wall section 15. In this way, the area of ​​the area where the air inlet holes 12 are arranged can be increased, thereby increasing the number of air inlet holes 12 on the second side wall section 15 and improving the air flow rate of the incoming air. The second air guide plate 151 can guide the incoming air flow, ensuring that the incoming air flow flows to the area close to the heat dissipation fan 40, and avoiding the incoming air flow from accumulating in the dead angle area between the second air guide plate 151 and the second side wall section 15.

[0159] As another feasible embodiment, the air inlet 12 is arranged on at least a portion of the second side wall section 15, and a third air guide plate 18 is also arranged in the accommodating cavity, and the first end of the third air guide plate 18 extends toward the second side wall section 15, and the second end of the third air guide plate 18 extends toward the first end of the second air guide plate 151.

[0160] The air inlet hole 12 is arranged on the side of the second side wall section 15 close to the heat dissipation fan 40. In this case, the second air guide plate 151 may not be arranged in the accommodating cavity, and only the third air guide plate 18 is used to guide the air inlet flow. Of course, the second air guide plate 151 may also be arranged, and the second air guide plate 151 guides the heat dissipation air flow around the coil disk 70 to flow to the air outlet hole 13 on the third side wall section 16.

[0161] As another feasible implementation, the air inlet 12 is arranged on the side of the second side wall section 15 close to the heat dissipation fan 40 , and the air outlet 13 on the bottom shell 10 is arranged on the side of the second side wall section 15 away from the heat dissipation fan 40 .

[0162] It should be noted that such a configuration can ensure that the air inlet 12 is as close as possible to the heat dissipation fan 40, which is conducive to the rapid flow of the inlet airflow to the heat dissipation fan 40, and the air outlet 13 is as close as possible to the coil disk 70, so that the high-temperature outlet airflow flows out of the accommodating cavity as soon as possible. In this case, the third air guide plate 18 provided in the accommodating cavity isolates the inlet airflow and the outlet airflow to prevent the convection between the two from affecting each other.

[0163] Specifically, the first end of the third air guide plate 18 is connected to the second side wall section 15. The specific connection position of the third air guide plate 18 on the second side wall section 15 can be set according to actual needs, and this embodiment does not limit this. As an achievable implementation, the second end of the third air guide plate 18 is connected to the first end of the second air guide plate 151. As another achievable implementation, the third air guide plate 18 is connected to an end of the extension portion 33 away from the circuit board body 32. Such a setting can improve the flexibility of the installation of the third air guide plate 18 and reduce the difficulty of assembling the induction cooker.

[0164] There is a second gap between the lower surface of the heat dissipation fan 40 and the bottom wall 11 of the bottom shell 10, and the second gap is connected to the air inlet and forms the air inlet of the fan cavity of the heat dissipation fan 40. There is a third gap between the upper surface of the heat dissipation fan 40 and the panel, and the third gap is connected to the air outlet 13 of the bottom shell 10 and forms the air outlet of the fan cavity of the heat dissipation fan 40. Such a setting can make the heat dissipation fan 40 form a wind flow mode of bottom air inlet and top air outlet, thereby improving the wind guidance effect of the heat dissipation fan 40.

[0165] Further, a first air inlet area of ​​the heat dissipation fan 40 is formed between the first air guide plate 141 and at least a portion of the first side wall section 14, and at least a portion of the circuit board 30 is located in the first air inlet area. A second air inlet area of ​​the heat dissipation fan 40 is formed between the second air guide plate 151 and at least a portion of the second side wall section 15. Both the first air inlet area and the second air inlet area are connected to the air inlet portion of the fan chamber of the heat dissipation fan 40. Such a configuration facilitates the airflow in the first air inlet area and the second air inlet area to flow to the heat dissipation fan 40, and at the same time facilitates the airflow in the first air inlet area to dissipate heat and cool the circuit board 30 located in the first air inlet area.

[0166] Specifically, there is a fourth gap between the circuit board bracket 31 and the side wall of the bottom shell 10, and at least one end of the side wall of the circuit board bracket 31 close to the bottom shell 10 is provided with a third flange 311, and the end of the third flange 311 extends toward the panel.

[0167] It should be noted that, based on the air inlet hole 12 provided on the side wall of the bottom shell 10, a third flange 311 is provided near the side wall of at least part of the circuit board bracket 31, and the third flange 311 can be used to protect the circuit board body 32, to prevent water vapor, oil smoke or dust outside the accommodating cavity from falling on the circuit board body 32 through the air inlet hole 12, and to prevent external conductors from contacting the circuit board body 32 through the air inlet hole 12, thereby improving the safety and stability of the circuit board body 32. At the same time, the third flange 311 can also guide the wind flow entering through the air inlet hole 12, to prevent the wind flow from accumulating in the dead angle area between the third flange 311 and the side wall, and to ensure that the incoming wind flow flows to the heat dissipation fan 40.

[0168] Optionally, the height of the third flange 311 ranges from 10 to 25 mm. In actual use, the user can set a specific value of the height of the third flange 311 as needed, and this embodiment does not limit this.

[0169] Specifically, the first air guide plate 141 and the second air guide plate 151 are spaced apart in the accommodating cavity, the extension portion 33 is located in the spaced apart area, and both ends of the extension portion 33 are respectively in contact with the first air guide plate 141 and the second air guide plate 151. By respectively in contact with the first air guide plate 141 and the second air guide plate 151, the airflow leaking out between the first air guide plate 141 and the extension portion 33, and between the second air guide plate 151 and the extension portion 33 can be effectively reduced, thereby increasing the airflow of the incoming air and ensuring the heat dissipation effect of the heating element.

[0170] The end of the extension portion 33 may overlap and abut at least a portion of the first air guide plate 141. The end of the extension portion 33 may overlap and abut at least a portion of the second air guide plate 151. By providing an overlapping area between the extension portion 33 and at least a portion of the first air guide plate 141, and providing an overlapping area in the extension portion 33 and at least a portion of the second air guide plate 151 bracket, the stability of the abutment can be improved, which not only improves the stability of the extension portion 33 in the bottom shell 10, but also reduces the loss of wind flow.

[0171] Specifically, when the first air guide plate 141 abuts against the extension portion 33, or when the second air guide plate 151 abuts against the extension portion 33, inconsistent abutment angles or inconsistent curvatures may occur at the abutment points, thereby reducing the stability of the abutment between the extension portion 33 and the first air guide plate 141 and the second air guide plate 151, and even causing a large gap at the abutment points, resulting in loss of incoming airflow.

[0172] To solve this problem, refer to Figure 5 As shown, a first transition piece 335 is provided between the first air guide plate 141 and the extension portion 33, and the first air guide plate 141 and the extension portion 33 are abutted by the first transition piece 335. The first transition piece 335 is connected to the bottom wall 11 of the bottom shell 10, and / or the first transition piece 335 is connected to the first air guide plate 141, and / or the first transition piece 335 is connected to a side of the extension portion 33 close to the first air guide plate 141.

[0173] It should be noted that the first transition piece 335 can be a straight structure, and the extension length of the straight structure can be set according to the structure of the first air guide plate 141. One end of the first transition piece 335 adapts to the arc structure of the extension portion 33, and the other end adapts to the straight structure of the first air guide plate 141, so that the two can overlap and abut through the first transition piece 335, which can reduce the difficulty of assembling the first air guide plate 141 and the extension portion 33, and reduce the assembly gap between the two.

[0174] A second transition piece 336 is provided between the second air guide plate 151 and the extension portion 33, and the second air guide plate 151 and the extension portion 33 are abutted by the second transition piece 336. The second transition piece 336 is connected to the bottom wall 11 of the bottom shell 10, and / or the second transition piece 336 is connected to the second air guide plate 151, and / or the second transition piece 336 is connected to a side of the extension portion 33 close to the second air guide plate 151.

[0175] It should be noted that the second transition piece 336 can be an arc-shaped structure, and the bending angle of the arc-shaped structure can be set according to the structure of the second air guide plate 151. One end of the second transition piece 336 adapts to the arc-shaped structure of the extension portion 33, and the other end of the second transition piece 336 adapts to the structure of the second air guide plate 151, so that the two can overlap and abut through the second transition piece 336, which can reduce the difficulty of assembling the second air guide plate 151 and the extension portion 33, and reduce the assembly gap between the two.

[0176] In actual use, the specific structure of the first transition piece 335 and the second transition piece 336 can be adjusted according to the specific structure of the extension portion 33, the first air guide plate 141 and the second air guide plate 151. This embodiment does not limit it, nor is it limited to the above text and drawings.

[0177] Specifically, the circuit board 30 is arranged in the accommodating cavity through the connecting assembly 50. The connecting assembly 50 includes at least one fixing column 52 arranged in the bottom shell 10 and at least one fixing hole 51 arranged on the circuit board 30. When the circuit board 30 is arranged in the bottom shell 10, the fixing columns 52 are correspondingly penetrated with the fixing holes 51, and at least part of the fixing holes 51 are located at the end of the extension portion 33. It should be noted that the fixing holes 51 can be located at the end position or corner position of the circuit board 30, or can be simultaneously arranged in the area between the end points of the circuit board 30. A plurality of fixing holes 51 can be arranged at intervals, and the specific number and interval distance of the fixing holes 51 are not limited in this embodiment. The number and setting position of the fixing columns 52 and the fixing holes 51 can correspond to each other. Among them, in this embodiment, the mounting feet of the induction cooker are used as part of the fixing columns 52, which can improve the setting stability of the fixing columns 52 and the connection stability of the connecting assembly 50. During the installation process, the fixing holes 51 of the circuit board 30 are penetrated with the fixing columns 52, which has the effect of guiding the installation of the circuit board 30.

[0178] Of course, the fixing column 52 and the fixing hole 51 can be tightly connected to further achieve the effect of fixed installation. Specifically, the fixing hole 51 can be located on the circuit board bracket 31 of the circuit board 30, thereby reducing the influence of the fixing hole 51 on the arrangement of electronic components on the circuit board body 32.

[0179] Further, the connection assembly 50 includes at least one connection member 53 disposed on the circuit board body 32. When the circuit board 30 is disposed in the bottom case 10, the connection member 53 is connected to the bottom case 10. It should be noted that there may be multiple connection members 53, one end of the connection member 53 is disposed on the circuit board body 32, and the other end is connected to the bottom case 10. During the installation process, the circuit board bracket 31 is first positioned through the fixing hole 51 and the fixing column 52, and then the circuit board body 32 is disposed on the circuit board bracket 31, and the connection is fastened by the connection member 53.

[0180] As a feasible implementation method, the connecting member 53 can be an elastic connecting member 53. During the installation process, when the panel cover is set on the bottom shell 10, the panel applies a certain pressure to the elastic connecting member 53, thereby completing the connection and tightening process of the elastic connecting member 53. Such a setting can greatly reduce the difficulty of assembling the induction cooker and improve the assembly efficiency.

[0181] Specifically, a support assembly 60 for supporting the circuit board 30 is disposed on the bottom shell 10, and the support assembly 60 includes one or more of the following:

[0182] At least one first support rib 61 is provided on the surface of the first air guide plate 141 close to the first side wall section 14. A plurality of first support ribs 61 may be provided, and the plurality of first support ribs 61 may be provided at intervals on the surface of the first air guide plate 141 close to the first side wall section 14.

[0183] At least one second support rib 62 is provided on the surface of the first side wall section 14 close to the first air guide plate 141. A plurality of second support ribs 62 may be provided, and a plurality of second support ribs 62 may also be provided at intervals on the surface of the first side wall section 14 close to the first air guide plate 141.

[0184] At least one third support rib 63 is provided on the outer peripheral wall of the fixing column 52. A plurality of third support ribs 63 may be provided, and the plurality of third support ribs 63 may also be spaced apart along the outer peripheral wall of the fixing column 52. The support assembly 60 mentioned above supports the circuit board 30, thereby improving the installation stability of the circuit board 30 and reducing the difficulty of the installation process.

[0185] As a feasible implementation, the distance between the upper surface of the extension part 33 and the lower surface of the panel is in the range of 0.5-1 mm. When the distance between the two is too small, the shaking process of the extension part 33 will cause impact on the panel, and even cause damage to the panel. At the same time, the small assembly gap between the two also increases the difficulty of assembly. When the distance between the two is too large, the amount of airflow leakage will be too large, affecting the heat dissipation effect of the induction cooker.

[0186] Optionally, the circuit board 30 is a light board and / or a power board 90. In this embodiment, the circuit board 30 is a light board as an example for the above description. In actual use, the circuit board 30 can also be a power board 90. Of course, the light board and the power board 90 can also be an integrated structure.

[0187] Embodiment 2

[0188] Figure 8 This is a schematic diagram of the structure in the accommodating cavity of an induction cooker for removing a circuit board body provided in the second embodiment of the present invention. Fig. 9 This is a schematic diagram of the structure in the accommodating cavity of an induction cooker for removing a circuit board provided in the second embodiment of the present invention. Fig.10 This is a schematic structural diagram of one side of the third flange of the circuit board bracket of the induction cooker provided in the second embodiment of the present invention. Fig.11 This is a schematic structural diagram of one side of the first flange of the circuit board bracket of the induction cooker provided in the second embodiment of the present invention. Fig.12 This is a schematic structural diagram of one side of the lower surface of a circuit board bracket of an induction cooker provided in Embodiment 2 of the present invention.

[0189] Reference Figures 8 to 12 As shown, based on the above-mentioned embodiment 1, embodiment 2 of the present invention provides an induction cooker. Compared with embodiment 1, embodiment 2 differs from embodiment 1 in that: the setting position of the air inlet 12, the structure and setting position of the circuit board bracket 31 are different.

[0190] Specifically, the air inlet hole 12 is disposed on the entire first side wall section 14 , and the circuit board bracket 31 is disposed at the bottom of the entire circuit board body 32 and is located between the circuit board body 32 and the air inlet hole 12 .

[0191] It should be noted that such a setting can increase the area of ​​the area where the air inlet holes 12 are set on the first side wall section 14, thereby increasing the number of air inlet holes 12 on the first side wall section 14, increasing the air flow rate of the air inlet, and enhancing the heat dissipation effect. In this case, since the air inlet holes 12 are located on the entire first side wall section 14, the circuit board bracket 31 needs to be set at the bottom of the entire circuit board body 32, so as to protect the circuit board body 32, and prevent the water vapor, oil smoke or dust entering the air inlet holes 12 at any position from causing the circuit board body 32 to be damp or damaged, or the conductor entering the air inlet holes 12 affects the stability of the electronic components on the circuit board body 32.

[0192] At this time, the fourth air guide plate 19 structure is not arranged between the first air guide plate 141 and the first side wall section 14, so as to avoid the fourth air guide plate 19 from blocking the incoming air flow.

[0193] Other technical features are the same as those in Example 1 and can achieve the same or corresponding technical effects, which will not be described in detail here.

[0194] The induction cooker provided in the second embodiment of the present invention extends at least part of the circuit board to at least part of the periphery of the heat dissipation fan and forms an extension portion, and uses the first gap formed between the extension portion and the bottom wall of the bottom shell as part or all of the air inlet of the heat dissipation fan. Based on the fact that the circuit board structure and the bottom shell structure are independent of each other and the installation space of the circuit board structure is relatively ample, the mold manufacturing process is not affected by the bottom shell structure, which greatly reduces the manufacturing difficulty of the heat dissipation fan air inlet structure and avoids affecting the installation of structural parts and electronic components on the bottom shell. In addition, the structure and size of the air inlet formed by the extension portion can be adjusted according to the structure of the heat dissipation fan, and the air inlet structure formed is relatively flexible, which increases the air intake of the heat dissipation fan and enhances the heat dissipation and cooling effect of the heat dissipation fan.

[0195] Embodiment 3

[0196] On the basis of the above-mentioned Embodiment 1 and Embodiment 2, Embodiment 3 of the present invention provides an induction cooker with another structure. Compared with Embodiment 1 or Embodiment 2, Embodiment 3 is different in that the air inlet structure of the heat dissipation fan is different.

[0197] Specifically, an upper cover is arranged between the bottom shell and the panel, a first wind shielding rib is arranged on one side of the upper cover close to the heat dissipation fan, and the first wind shielding rib is arranged around the heat dissipation fan. A fifth gap is provided between the first wind shielding rib and the bottom wall of the bottom shell, and the first gap and the fifth gap together constitute the air inlet of the heat dissipation fan.

[0198] It should be noted that in this embodiment, at least part of the circuit board is extended to at least part of the periphery of the heat dissipation fan to form an extension portion, and a first wind shielding rib is provided on the upper cover, and the first wind shielding rib can surround at least part of the periphery of the heat dissipation fan. The gap formed between the extension portion and the first wind shielding rib and the bottom wall of the bottom shell is used as at least part of the air inlet of the heat dissipation fan. Compared with the prior art of providing an air inlet structure in the bottom shell, the structure of the bottom shell is relatively complex, which increases the structural complexity of the mold used in the manufacturing process. The mold with a complex structure limits the structure and size of the air inlet, affecting the air intake of the heat dissipation fan.

[0199] However, the extension portion of the present embodiment is located on the circuit board, and the circuit board and the bottom shell, upper cover and panel are all separate structures that are independent of each other, so its structure is not restricted by the three. The first wind shielding rib is located on the upper cover, and the upper cover and the bottom shell structure are independent of each other, so it is not restricted by the bottom shell structure. Therefore, the air inlet of the heat dissipation fan formed by the extension portion and the first wind shielding rib can be adaptively adjusted according to the structure of the heat dissipation fan. The structural flexibility of the air inlet is relatively high, which increases the air intake of the heat dissipation fan, enhances the heat dissipation and cooling effect of the heat dissipation fan, ensures the stability and efficiency of the induction cooker, and extends the service life of the induction cooker.

[0200] As an optional implementation, the side of the extension portion close to the heat dissipation fan has an edge, and the side of the first wind shielding rib close to the heat dissipation fan also has an edge.

[0201] Both edges are arc-shaped, both edges surround at least a portion of the outer circumference of the heat dissipation fan, and both arc-shaped edges are concentrically arranged with the center of the heat dissipation fan.

[0202] And / or, the area of ​​the edge of the extension portion on one side close to the heat dissipation fan surrounding the outer circumference of the heat dissipation fan accounts for 10%-15% of the entire outer circumference of the heat dissipation fan.

[0203] And / or, the area of ​​the outer circumference of the heat dissipating fan surrounded by the edge of the first wind shielding rib on one side close to the heat dissipating fan accounts for 20%-25% of the entire outer circumference of the heat dissipating fan.

[0204] And / or, the central angle of the edge of the arc-shaped extension portion on one side close to the heat dissipation fan is in the range of 40°-50°.

[0205] And / or, the central angle of the edge of the arc-shaped first wind shielding rib on one side close to the heat dissipation fan is in the range of 70°-90°.

[0206] By setting the edge of the extension part and the edge of the first wind shielding rib to be arc-shaped, a structure surrounding the heat dissipation fan is formed, which is beneficial to gathering the incoming air flow to the heat dissipation fan and increasing the air intake volume of the heat dissipation fan.

[0207] As an optional implementation, the thickness of the edge of the extension portion on the side close to the heat dissipation fan and the edge of the first wind shielding rib on the side close to the heat dissipation fan are both in the range of 10-25 mm.

[0208] And / or, the edge of the extension portion on the side close to the heat dissipation fan and the edge of the first wind shielding rib on the side close to the heat dissipation fan are respectively provided with flanges, the ends of the two flanges extend toward one side of the panel, and the height range of the two flanges is 10-25mm.

[0209] As an optional embodiment, the upper surface of the edge of the extension portion on the side close to the heat dissipation fan is flush with the upper surface of the edge of the first wind shielding rib on the side close to the heat dissipation fan, and the lower surface of the edge of the extension portion on the side close to the heat dissipation fan is flush with the lower surface of the edge of the first wind shielding rib on the side close to the heat dissipation fan.

[0210] The upper surfaces of the edge of the extension portion on the side close to the heat dissipation fan and the edge of the first wind shielding rib on the side close to the heat dissipation fan are both higher than the upper surface of the heat dissipation fan, and the lower surfaces of the edge of the extension portion on the side close to the heat dissipation fan and the edge of the first wind shielding rib on the side close to the heat dissipation fan are both located between the upper surface and the lower surface of the heat dissipation fan.

[0211] Such a setting allows the incoming air flow between the lower surface of the cooling fan and the heating bottom wall of the bottom shell to enter the cooling fan as much as possible, while ensuring that the outgoing air flow on the upper surface of the cooling fan flows to the location of the heating element as much as possible, thereby optimizing the heat dissipation effect of the heating element.

[0212] And / or, the distance between the lower surface of the edge of the extension portion on one side close to the heat dissipation fan and the edge of the first wind shielding rib on one side close to the heat dissipation fan and the upper surface of the heat dissipation fan is 30%-60% of the thickness of the heat dissipation fan.

[0213] And / or, the upper surface of the extension part and the first wind shielding rib both extend to the lower surface of the panel. Such an arrangement can prevent the airflow of the heat dissipation fan from leaking out, and ensure the heat dissipation effect of the airflow on the heating element.

[0214] And / or, the lower surfaces of the extension portion and the first wind shielding rib are both planes, inclined surfaces or curved surfaces.

[0215] Other technical features are the same as those of Embodiment 1 and Embodiment 2, and can achieve the same or corresponding technical effects, which will not be described in detail here.

[0216] Embodiment 4

[0217] On the basis of the above-mentioned first and second embodiments, the fourth embodiment of the present invention provides an induction cooker with another structure. Compared with the above-mentioned embodiments, the fourth embodiment is different in that the air inlet structure of the heat dissipation fan is different.

[0218] Specifically, a second wind shielding rib is arranged on one side of the bottom shell near the heat dissipation fan, and the second wind shielding rib is arranged around the heat dissipation fan. A sixth gap is provided between the second wind shielding rib and the bottom wall of the bottom shell, and the first gap and the sixth gap together constitute the air inlet of the heat dissipation fan.

[0219] It should be noted that, in this embodiment, at least part of the circuit board is extended to at least part of the periphery of the heat dissipation fan to form an extension, and a second wind shielding rib is provided on the bottom shell, and the second wind shielding rib can surround at least part of the periphery of the heat dissipation fan. The gap between the extension and the second wind shielding rib and the bottom wall of the bottom shell is used as at least part of the air inlet of the heat dissipation fan. Compared with the prior art in which the air inlet structure is only provided in the bottom shell, the structure of the bottom shell is relatively complex, which increases the structural complexity of the mold used in the manufacturing process. The mold with a complex structure limits the structure and size of the air inlet, which affects the air intake of the heat dissipation fan.

[0220] However, the extension part of this embodiment is located on the circuit board, and is a separate structure independent of the bottom shell, the upper cover and the panel, so its structure is not restricted by the three. The extension part cooperates with the second wind shielding rib, so the air inlet of the heat dissipation fan formed can be adaptively adjusted according to the structure of the heat dissipation fan, and the structural flexibility of the air inlet is high, which increases the air intake volume of the heat dissipation fan, enhances the heat dissipation and cooling effect of the heat dissipation fan, ensures the stability and efficiency of the induction cooker, and prolongs the service life of the induction cooker.

[0221] As an optional embodiment, the second windshield rib has a supporting portion and a windshield portion connected to each other, a gap is provided between the windshield portion and the bottom wall of the bottom shell of the bottom shell, and the supporting portion is connected between the windshield portion and the bottom wall of the bottom shell. And / or, the supporting portion is connected to one end of the windshield portion close to the extension portion.

[0222] By setting the second wind shield rib as a supporting part and a wind shield part, using the supporting part to support the wind shield part, using the wind shield part to limit the incoming airflow of the heat dissipation fan and guide the incoming airflow, the installation stability of the second wind shield rib is improved and the guiding effect on the incoming airflow of the heat dissipation fan is enhanced.

[0223] As an optional embodiment, the extension portion has an edge on one side close to the heat dissipation fan. The edge and the second wind shielding rib are both arc-shaped, and the edge and the second wind shielding rib surround at least part of the outer periphery of the heat dissipation fan. The arc-shaped edge and the second wind shielding rib are both arranged concentrically with the center of the circle of the heat dissipation fan. And / or, the area of ​​the outer periphery of the heat dissipation fan surrounded by the edge accounts for 10%-15% of the entire outer periphery of the heat dissipation fan. And / or, the area of ​​the outer periphery of the heat dissipation fan surrounded by the second wind shielding rib accounts for 20%-25% of the entire outer periphery of the heat dissipation fan. And / or, the center angle of the arc-shaped edge ranges from 40° to 50°. And / or, the center angle of the arc-shaped second wind shielding rib ranges from 70° to 90°.

[0224] By setting the edge of the extension part on the side close to the heat dissipation fan and the second wind shielding rib to an arc shape, a structure surrounding the heat dissipation fan is formed, which is beneficial to gathering the incoming air flow to the heat dissipation fan and increasing the air intake volume of the heat dissipation fan.

[0225] As an optional embodiment, the thickness of the edge and the wind shield is in the range of 10-25 mm. And / or, the edge is provided with a flange, the end of which extends toward one side of the panel, and the height of the flange is in the range of 10-25 mm.

[0226] As an optional embodiment, the upper surface of the edge is flush with the upper surface of the windshield, and the lower surface of the edge is flush with the lower surface of the windshield. The upper surfaces of the edge and the windshield are both higher than the upper surface of the heat dissipation fan, and the lower surfaces of the edge and the windshield are both located between the upper surface and the lower surface of the heat dissipation fan.

[0227] Such a setting allows the inlet air flow between the lower surface of the cooling fan and the bottom wall of the bottom shell to enter the cooling fan as much as possible, while ensuring that the outlet air flow on the upper surface of the cooling fan flows to the location of the heating element as much as possible, thereby optimizing the heat dissipation effect of the heating element.

[0228] And / or, the distance between the lower surface of the edge and the wind shield and the upper surface of the heat dissipation fan is 30%-60% of the thickness of the heat dissipation fan. And / or, the upper surface of the extension part and the second wind shield rib both extend to the lower surface of the panel. And / or, the lower surface of the extension part and the second wind shield rib are both flat, inclined or curved. Such a setting can prevent the airflow of the heat dissipation fan from leaking out, and ensure the heat dissipation effect of the airflow on the heating element.

[0229] Other technical features are the same as those of Embodiments 1 to 3, and can achieve the same or corresponding technical effects, which will not be described in detail here.

[0230] Embodiment 5

[0231] On the basis of the above-mentioned embodiments 1 to 4, the fifth embodiment of the present invention provides an induction cooker with another structure. Compared with the above-mentioned embodiments, the difference between the fifth embodiment and the above-mentioned embodiments is that the air inlet structure of the heat dissipation fan is different.

[0232] Specifically, an upper cover is arranged between the bottom shell and the panel, a first wind shielding rib is arranged on the side of the upper cover close to the heat dissipation fan, and a second wind shielding rib is arranged on the side of the bottom shell close to the heat dissipation fan; the first wind shielding rib and the second wind shielding rib are both arranged around the heat dissipation fan.

[0233] There is a fifth gap between the first wind shielding rib and the bottom wall of the bottom shell, there is a sixth gap between the second wind shielding rib and the bottom wall of the bottom shell, and the first gap, the fifth gap and the sixth gap together constitute the air inlet of the heat dissipation fan.

[0234] It should be noted that in this embodiment, at least part of the circuit board is extended to at least part of the periphery of the heat dissipation fan to form an extension portion, a first wind shield rib is provided on the upper cover, and a second wind shield rib is provided on the bottom shell, and the first wind shield rib and the second wind shield rib can both surround at least part of the periphery of the heat dissipation fan. The gap formed between the extension portion, the first wind shield rib and the second wind shield rib and the bottom wall of the bottom shell is used as at least part of the air inlet of the heat dissipation fan. Compared with the prior art in which the air inlet structure is only provided in the bottom shell, the structure of the bottom shell is relatively complex, which increases the structural complexity of the mold used in the manufacturing process. The mold with a complex structure limits the structure and size of the air inlet, affecting the air intake of the heat dissipation fan.

[0235] However, the extension part of the present embodiment is located on the circuit board, and the circuit board and the bottom shell, upper cover and panel are all separate structures that are independent of each other, so its structure is not restricted by the three. The first wind shielding rib is located on the upper cover, and the upper cover and the bottom shell structure are independent of each other, so it is not restricted by the bottom shell structure. Therefore, the extension part, the first wind shielding rib and the second wind shielding rib cooperate with each other, and the air inlet of the heat dissipation fan formed can be adaptively adjusted according to the structure of the heat dissipation fan. The structural flexibility of the air inlet is high, which increases the air intake of the heat dissipation fan, enhances the heat dissipation and cooling effect of the heat dissipation fan, ensures the stability and efficiency of the induction cooker, and extends the service life of the induction cooker.

[0236] Other technical features are the same as those of Embodiments 1 to 4, and can achieve the same or corresponding technical effects, which will not be described in detail here.

[0237] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In the description of the present invention, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0238] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0239] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An induction cooker, comprising a bottom shell (10) and a panel covering the bottom shell (10), the bottom shell (10) and the panel forming a receiving cavity, a heat dissipation fan (40) and a circuit board (30) being arranged in the receiving cavity, the side wall of the bottom shell (10) comprising at least a first side wall section (14), a second side wall section (15), a third side wall section (16) and a fourth side wall section (17) being connected in sequence, the heat dissipation fan (40) being arranged in the receiving cavity near the connection between the first side wall section (14) and the second side wall section (15), an air inlet hole (12) being provided on the bottom shell (10), the circuit board (30) comprising a circuit board bracket (31) and a circuit board body (32) arranged above the circuit board bracket (31), the circuit board bracket (31) being located between at least a portion of the circuit board body (32) and at least a portion of the air inlet hole (12), characterized in that: At least a portion of the circuit board bracket (31) extends to at least a portion of the periphery of the heat dissipation fan (40) to form an extension portion (33); A first gap is provided between the extension portion (33) and the bottom wall (11) of the bottom shell (10), and the first gap forms part or all of the air inlet of the heat dissipation fan (40); A side of the extension portion (33) close to the heat dissipation fan (40) has a first edge (331); The first edge (331) is arc-shaped, the first edge (331) surrounds at least a portion of the outer circumference of the heat dissipation fan (40), and the arc-shaped first edge (331) is arranged concentrically with the center of the heat dissipation fan (40); The first edge (331) is provided with a first flange (332), and an end of the first flange (332) extends toward one side of the panel; The extension portion (33) has a second edge (333) on a side away from the heat dissipation fan (40), and the second edge (333) is arranged close to the second side wall section (15); The second edge (333) is provided with a second flange (334), and an end of the second flange (334) extends toward the panel.

2. The induction cooker according to claim 1, characterized in that: The air inlet hole (12) is arranged on the side wall of the bottom shell (10); The air inlet hole (12) is arranged on at least a portion of the first side wall section (14) and / or at least a portion of the second side wall section (15).

3. The induction cooker according to claim 2, characterized in that: The area of ​​the outer circumference of the heat dissipation fan (40) surrounded by the first edge (331) occupies at least 1 / 3 of the entire outer circumference of the heat dissipation fan (40); And / or, the central angle of the first edge (331) is in the range of 50°-150°.

4. The induction cooker according to claim 3, characterized in that: The upper surface of the first edge (331) is higher than the upper surface of the heat dissipation fan (40), and the lower surface of the first edge (331) is located between the upper surface and the lower surface of the heat dissipation fan (40); and / or, the distance between the lower surface of the first edge (331) and the upper surface of the heat dissipation fan (40) is 30%-60% of the thickness of the heat dissipation fan (40); and / or, the upper surface of the extension portion (33) extends to the lower surface of the panel; And / or, the lower surface of the extension portion (33) is a plane, an inclined surface or a curved surface.

5. The induction cooker according to claim 3, characterized in that: The thickness of the first edge (331) is in the range of 10-25 mm; And / or, the height of the first flange (332) is in the range of 10-25 mm.

6. The induction cooker according to claim 2, characterized in that: The second edge (333) is in a straight line shape.

7. The induction cooker according to any one of claims 1 to 6, characterized in that: The circuit board bracket (31) is a plastic part; And / or, the lower surface of the circuit board bracket (31) is a plane, an inclined surface or a curved surface; And / or, at least one reinforcing rib (312) is provided on the circuit board bracket (31).

8. The induction cooker according to any one of claims 1 to 6, characterized in that: The air inlet hole (12) is arranged on the bottom wall (11) and / or the side wall of the bottom shell (10); And / or, the heat dissipation fan (40) is an axial flow fan; And / or, the heat dissipation fan (40) comprises a fan bracket (41) and a fan body (42) arranged on the fan bracket (41), and the fan bracket (41) is located at the bottom of the fan body (42).

9. The induction cooker according to claim 8, characterized in that: The panel comprises an operating area and a heating area, and the air inlet (12) is arranged on a side of the bottom shell (10) close to the operating area; And / or, the air inlet hole (12) is arranged on the bottom wall (11) of the bottom shell (10), and the air inlet hole (12) is located outside the projection area of ​​the heat dissipation fan (40) on the bottom wall (11) of the bottom shell (10).

10. The induction cooker according to any one of claims 2 to 6, characterized in that: A first air guide plate (141) is provided in the accommodating cavity near the first side wall section (14); a first end of the first air guide plate (141) is connected to the fourth side wall section (17); and a second end of the first air guide plate (141) extends toward the heat dissipation fan (40).

11. The induction cooker according to claim 10, characterized in that: The air inlet hole (12) is arranged on the entire first side wall section (14), and the circuit board bracket (31) is arranged at the bottom of the entire circuit board body (32) and is located between the circuit board body (32) and the air inlet hole (12); Or, the air inlet (12) is arranged on at least a portion of the first side wall section (14); a fourth air guide plate (19) is arranged between the first air guide plate (141) and the first side wall section (14); a first end of the fourth air guide plate (19) is connected to the first side wall section (14); a second end of the fourth air guide plate (19) is connected to the first air guide plate (141) or an end of the extension portion (33) close to the first air guide plate (141); the first air guide plate (141), the fourth air guide plate (19), a portion of the first side wall section (14) and a portion of the fourth side wall section (17) together form a cavity (80); The air inlet hole (12) is arranged on a side of the first side wall section (14) close to the heat dissipation fan (40) and is located outside the cavity (80); the circuit board bracket (31) is arranged at the bottom of a side of the circuit board body (32) close to the heat dissipation fan (40) and is located between the circuit board body (32) and the air inlet hole (12).

12. The induction cooker according to claim 10, characterized in that: A second air guide plate (151) is provided on a side of the accommodating cavity close to the second side wall section (15); a first end of the second air guide plate (151) is located on a side close to the heat dissipation fan (40); and a second end of the second air guide plate (151) extends toward the third side wall section (16).

13. The induction cooker according to claim 12, characterized in that: The second end of the second air guide plate (151) is connected to a side of the second side wall section (15) away from the heat dissipation fan (40); or, the second end of the second air guide plate (151) is connected to the third side wall section (16); or, the second end of the second air guide plate (151) is connected to the connection between the second side wall section (15) and the third side wall section (16).

14. The induction cooker according to any one of claims 2 to 6, characterized in that: The air inlet hole (12) is arranged on the entire second side wall section (15).

15. The induction cooker according to claim 12, characterized in that: The air inlet hole (12) is arranged on at least a portion of the second side wall section (15); a third air guide plate (18) is further arranged in the accommodating cavity; a first end of the third air guide plate (18) extends toward the second side wall section (15); and a second end of the third air guide plate (18) extends toward the first end of the second air guide plate (151); And / or, the air inlet hole (12) is arranged on a side of the second side wall section (15) close to the heat dissipation fan (40); And / or, the air inlet (12) is arranged on a side of the second side wall section (15) close to the heat dissipation fan (40), and the air outlet (13) on the bottom shell (10) is arranged on a side of the second side wall section (15) away from the heat dissipation fan (40).

16. The induction cooker according to claim 15, characterized in that: A first end of the third air guide plate (18) is connected to the second side wall section (15); and / or, the second end of the third air guide plate (18) is connected to the first end of the second air guide plate (151); And / or, the third air guide plate (18) is connected to an end of the extension portion (33) away from the circuit board body (32).

17. The induction cooker according to claim 11, characterized in that: A second gap is provided between the lower surface of the heat dissipation fan (40) and the bottom wall (11) of the bottom shell (10), and the second gap is connected to the air inlet and forms an air inlet portion of the fan cavity of the heat dissipation fan (40); A third gap is provided between the upper surface of the heat dissipation fan (40) and the panel, and the third gap is connected to the air outlet hole (13) of the bottom shell (10) and forms an air outlet portion of the fan cavity of the heat dissipation fan (40).

18. The induction cooker according to any one of claims 1 to 5, characterized in that: A fourth gap is provided between the circuit board bracket (31) and the side wall of the bottom shell (10); at least a portion of the circuit board bracket (31) is provided with a third flange (311) at one end of the side wall close to the bottom shell (10); and an end of the third flange (311) extends toward the panel; The height of the third flange (311) is in the range of 10-25 mm.

19. The induction cooker according to claim 12, characterized in that: The first air guide plate (141) and the second air guide plate (151) are spaced apart in the accommodating cavity, the extension portion (33) is located in the spaced apart area, and two ends of the extension portion (33) are respectively in contact with the first air guide plate (141) and the second air guide plate (151); And / or, the end of the extension portion (33) overlaps and abuts against at least a portion of the first air guide plate (141); And / or, an end portion of the extension portion (33) overlaps with and abuts against at least a portion of the second air guide plate (151).

20. The induction cooker according to claim 19, characterized in that A first transition piece (335) is provided between the first air guide plate (141) and the extension portion (33), and the first air guide plate (141) and the extension portion (33) are in contact with each other through the first transition piece (335); The first transition piece (335) is connected to the bottom wall (11) of the bottom shell (10), and / or the first transition piece (335) is connected to the first air guide plate (141), and / or the first transition piece (335) is connected to a side of the extension portion (33) close to the first air guide plate (141); And / or, a second transition piece (336) is provided between the second air guide plate (151) and the extension portion (33), and the second air guide plate (151) and the extension portion (33) are abutted against each other via the second transition piece (336); The second transition piece (336) is connected to the bottom wall (11) of the bottom shell (10), and / or the second transition piece (336) is connected to the second air guide plate (151), and / or the second transition piece (336) is connected to the side of the extension portion (33) close to the second air guide plate (151).

21. The induction cooker according to claim 12, characterized in that: A first air inlet area of ​​the heat dissipation fan (40) is formed between the first air guide plate (141) and at least a portion of the first side wall section (14), and at least a portion of the circuit board (30) is located in the first air inlet area; A second air inlet area of ​​the heat dissipation fan (40) is formed between the second air guide plate (151) and at least a portion of the second side wall section (15); The first air inlet area and the second air inlet area are both in communication with the air inlet portion of the fan cavity of the heat dissipation fan (40).

22. The induction cooker according to claim 10, characterized in that The circuit board (30) is arranged in the accommodating cavity via a connecting component (50); The connecting assembly (50) comprises at least one fixing column (52) arranged in the bottom shell (10) and at least one fixing hole (51) arranged on the circuit board (30); when the circuit board (30) is arranged in the bottom shell (10), the fixing columns (52) are respectively provided with the fixing holes (51), and at least part of the fixing holes (51) are located at the ends of the extension portion (33); And / or, the connection component (50) includes at least one connection member (53) disposed on the circuit board body (32), and when the circuit board (30) is disposed in the bottom shell (10), the connection member (53) is connected to the bottom shell (10).

23. The induction cooker according to claim 22, characterized in that: The bottom shell (10) is provided with a support assembly (60) for supporting the circuit board (30), and the support assembly (60) includes one or more of the following: at least one first supporting rib (61), the first supporting rib (61) being arranged on a surface of the first air guide plate (141) close to the first side wall section (14); at least one second supporting rib (62), the second supporting rib (62) being arranged on a surface of the first side wall section (14) close to the first air guide plate (141); At least one third supporting rib (63), wherein the third supporting rib (63) is arranged on the outer peripheral wall of the fixing column (52).

24. The induction cooker according to any one of claims 1 to 6, characterized in that: The distance between the upper surface of the extension portion (33) and the lower surface of the panel is in the range of 0.5-1 mm.

25. The induction cooker according to any one of claims 1 to 6, characterized in that: The circuit board (30) is a light board and / or a power board (90).

26. The induction cooker according to any one of claims 1 to 6, characterized in that: An upper cover (20) is arranged between the bottom shell (10) and the panel; a first wind shielding rib is arranged on a side of the upper cover (20) close to the heat dissipation fan (40); a second wind shielding rib is arranged on a side of the bottom shell (10) close to the heat dissipation fan (40); the first wind shielding rib and the second wind shielding rib are both arranged around the heat dissipation fan (40); There is a fifth gap between the first wind shielding rib and the bottom wall (11) of the bottom shell (10), there is a sixth gap between the second wind shielding rib and the bottom wall (11) of the bottom shell (10), and the first gap, the fifth gap and the sixth gap together constitute an air inlet of the heat dissipation fan (40).

Images