CN114554640A

CN114554640A - Heat radiation structure and electromagnetism stove

Info

Publication number: CN114554640A
Application number: CN202210137655.8A
Authority: CN
Inventors: 李增立; 陈粤强
Original assignee: Guangzhou K Kou Electrical Appliance Technology Co ltd
Current assignee: Guangzhou K Kou Electrical Appliance Technology Co ltd
Priority date: 2022-02-15
Filing date: 2022-02-15
Publication date: 2022-05-27

Abstract

The invention relates to the technical field of induction cookers, and provides a heat dissipation structure and an induction cooker, which comprises: a housing having an accommodating chamber and a fan; an air inlet duct, a cooling duct and a first air outlet duct are arranged in the accommodating cavity; the air inlet duct, the cooling duct and the first air outlet duct are communicated in sequence; the fan is arranged in the air inlet duct; the shell is provided with a wiring channel for wiring coils; part of the wiring channel extends along the cooling air duct and can exchange heat with the cooling air duct.

Description

Heat radiation structure and electromagnetism stove

Technical Field

The invention belongs to the technical field of induction cookers, and particularly relates to a heat dissipation structure and an induction cooker.

Background

Induction cookers have been applied to various aspects of modern life. The electromagnetic oven mainly comprises three heat sources (respectively, a heated object, a rectifier bridge and a power tube). After an object to be heated (such as a kettle) is heated, the heat is easily conducted to the coil (the current on the coil is changed to generate a changing magnetic field and the object to be heated is electromagnetically induced to heat) in an indirect heat conduction mode, so that the temperature is increased. The existing heat dissipation scheme is that a fan is directly placed in a space where a coil is located, but turbulent flow or circulation flow is easily generated, heat cannot be timely discharged, and heat dissipation efficiency is seriously reduced.

Disclosure of Invention

The invention aims to provide a heat dissipation structure to solve the technical problem that in the prior art, the heat dissipation efficiency of a fan in an induction cooker is low.

In order to achieve the purpose, the invention adopts the technical scheme that: provided is a heat dissipation structure including: a housing having an accommodating chamber and a fan; an air inlet duct, a cooling duct and a first air outlet duct are arranged in the accommodating cavity; the air inlet duct, the cooling duct and the first air outlet duct are communicated in sequence; the fan is arranged in the air inlet duct; the shell is provided with a wiring channel for wiring coils; part of the wiring channel extends along the cooling air duct and can exchange heat with the cooling air duct.

Furthermore, the inner wall of the cooling air duct is provided with a drainage groove extending along the cooling air duct.

Further, still include: a wind shielding member; an annular space is arranged in the accommodating cavity; the wiring channel is arranged in the annular space and distributed along the annular space; the wind shielding part is arranged in the annular space, and the space between the wiring channel and the inner wall of the annular space is filled with the wind shielding part; in the extending direction of the annular space, the annular space is partitioned by the wind shielding piece to form the arc-shaped cooling air duct.

Further, the method also comprises the following steps: the wire coil is provided with a wiring channel; the lower wind shielding frame, the wire coil and the upper wind shielding frame are sequentially arranged from bottom to top respectively; the lower wind shielding frame and the upper wind shielding frame form an annular space, and the wire coil is positioned between the upper wind shielding frame and the lower wind shielding frame.

Furthermore, a heat-conducting piece used for being in heat-conducting connection with the power tube is arranged on the air inlet duct at the downstream of the fan; the heat conducting piece is provided with a flow guide groove; the diversion trench is communicated with the air inlet duct.

Further, still include: a second air outlet duct; the inlet of the second air outlet duct is communicated with the air inlet duct between the heat conducting piece and the fan; and a first accommodating space for accommodating the power tube is formed in the second air outlet duct.

Furthermore, a second accommodating space for placing a rectifier bridge is formed in the second air outlet duct; the second accommodating space is located at the downstream of the first accommodating space.

Furthermore, the bottom of the shell is provided with an air inlet which is communicated with the inlet of the air inlet duct.

Furthermore, an air outlet hole which is inclined towards the lower side of the outer side is formed in the side wall of the shell; the air outlet hole is communicated with the outlet of the first air outlet duct, and the air outlet hole is communicated with the outlet of the second air outlet duct.

The present invention also provides an induction cooker, comprising: a coil and the heat dissipation structure; the coil is arranged in the wiring channel.

The heat dissipation structure provided by the invention has the beneficial effects that: compared with the prior art, the heat dissipation structure provided by the invention has the advantages that the shell is provided with the accommodating cavity; the accommodating cavity is respectively provided with an air inlet duct, a cooling duct and a first air outlet duct; the airflow flows through the air inlet duct, the cooling duct and the first air outlet duct in sequence; the air flow has strong directionality in the flowing process, heat can be radiated along with the air flow, heat is not easy to accumulate, turbulent flow is not easy to occur, and the radiating efficiency is greatly improved; a wiring channel is arranged on the shell, and the coil can be arranged along the wiring channel; heat exchange can be carried out between part wiring passageway and the cooling air duct, and this part wiring passageway extends along cooling air duct (presume that extend along cooling air duct and can carry out the partial wiring passageway of heat exchange with cooling air duct be predetermined cooling wiring section), make the in-process that the air current flows along cooling air duct, the air current in the cooling air duct can flow and cool off the coil in the predetermined cooling wiring section along predetermined cooling wiring section, the heat that gets into cooling air duct on the coil can be taken away along cooling air duct, the heat can in time discharge, the radiating efficiency has been promoted greatly.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is an exploded view of a heat dissipation structure according to an embodiment of the present invention;

FIG. 2 is an exploded view of a lower wind-shield frame and a wire coil according to an embodiment of the present invention;

FIG. 3 is an exploded view of the bottom cover and the heat conductive member according to the embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of a heat dissipation structure according to an embodiment of the present invention (the direction of the thick arrow is the airflow direction);

FIG. 5 is an enlarged schematic view at A in FIG. 4 (FIG. 4 is a view hiding the inner rectifying bridge structure of the upper cover);

fig. 6 is a bottom view of the heat dissipation structure provided in the embodiment of the present invention (with the bottom cover removed and the electronic board hidden (the edge of the electronic board is a dashed line)) (the direction of the bold arrow is the airflow direction);

FIG. 7 is a schematic view of the air flow on the lower wind shielding rack provided by the embodiment of the present invention (the thick arrow direction is the air flow direction);

FIG. 8 is a schematic view of an electronic board mounted on a bottom cover according to an embodiment of the present invention;

FIG. 9 is a schematic view of a lower wind-shielding bracket mounted above an electronic board according to an embodiment of the present invention;

FIG. 10 is a schematic view of a spool according to an embodiment of the present invention mounted above a lower wind-shielding frame;

FIG. 11 is a schematic view of an upper lid mounted over a bottom lid according to an embodiment of the present invention;

FIG. 12 is a schematic view of a glass plate mounted over a coil according to an embodiment of the present invention.

Wherein, in the figures, the various reference numbers:

1-a shell; 11-a bottom cover; 111-air inlet; 112-a waterproof slot; 12-upper cover; 121-air outlet; 21-air inlet duct; 22-a cooling air duct; 23-a first air outlet duct; 24-a second air outlet duct; 3-a fan; 41-wind shielding parts; 42-wire coil; 43-routing channels; 431-coil; 44-lower wind shield; 441-air inlet holes; 442-air outlet holes; 443-wind-blocking ribs; 444-drainage grooves; 45-upper wind shield; 51-a thermally conductive member; 511-diversion trench; 52-power tube; 53-a rectifier bridge; 61-the object to be heated; 62-a glass plate; 63-a first weatherstrip; 64-a second wind blocking strip; 65-electronic board; 66-a heat-insulating ring; f-heat transfer direction.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It should be noted that in the description of the embodiments of the present application, "/" indicates "or" means, for example, a/B may indicate a or B; "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. Wherein, A and B can be singular or plural respectively.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 to 12, the heat dissipation structure of the present invention will now be described. The heat radiation structure includes: a housing 1 having an accommodating chamber and a fan 3; an air inlet duct 21, a cooling duct 22 and a first air outlet duct 23 are arranged in the accommodating cavity; the air inlet duct 21, the cooling duct 22 and the first air outlet duct 23 are communicated in sequence; the fan 3 is arranged in the air inlet duct 21; the housing 1 is provided with a wiring channel 43 for wiring the coil 431; part of the wiring passage 43 (part of the wiring passage 43: a section of the wiring passage 43; for example, if the wiring passage 43 is a ring, part of the wiring passage 43 may be an arc on the ring) extends along the cooling air duct 22 and can exchange heat with the cooling air duct 22.

Thus, the shell 1 is provided with an accommodating cavity; the accommodating cavity is respectively provided with an air inlet duct 21, a cooling duct 22 and a first air outlet duct 23; the airflow flows through the air inlet duct 21, the cooling duct 22 and the first air outlet duct 23 in sequence; the airflow has strong directionality in the flowing process, heat can be radiated along with the airflow, heat is not easy to accumulate, and turbulent flow is not easy to occur, so that the radiating efficiency is greatly improved; the housing 1 is provided with a wiring channel 43, and the coil 431 can be arranged along the wiring channel 43; heat exchange can be performed between a part of the wiring channel 43 and the cooling air duct 22, and the part of the wiring channel 43 extends along the cooling air duct 22 (assuming that the part of the wiring channel 43 which extends along the cooling air duct 22 and can perform heat exchange with the cooling air duct 22 is a predetermined cooling wiring section), so that in the process that the airflow flows along the cooling air duct 22, the airflow in the cooling air duct 22 can flow along the predetermined cooling wiring section and cool the coil 431 in the predetermined cooling wiring section, the heat entering the cooling air duct 22 on the coil 431 can be taken away along the cooling air duct 22, the heat can be discharged in time, and the heat dissipation efficiency is greatly improved.

In one embodiment, the housing 1 includes: a bottom cover 11 and an upper cover 12; the edge of the bottom cover 11 is provided with a waterproof groove 112, the edge of the upper cover 12 is clamped in the waterproof groove 112, and the outer edge of the waterproof groove 112 is lower than the inner edge, so that the moisture is easily discharged outwards.

In one embodiment, the air intake duct 21 may be a space, duct, or groove through which the air flow passes.

In one embodiment, cooling air duct 22 may be a space, duct, or trough through which the air flow passes.

In one embodiment, the first outlet duct 23 may be a space, a pipe, or a groove through which the airflow passes.

In one embodiment, the second outlet duct 24 may be a space, duct or groove through which the airflow passes.

Referring to fig. 1 to 12, as an embodiment of the heat dissipation structure provided by the present invention, a flow guiding groove 444 extending along the cooling air duct 22 is disposed on an inner wall of the cooling air duct 22. Thus, the airflow is more directional under the guidance of the drainage slots 444, reducing wind resistance.

Referring to fig. 1 to 12, as an embodiment of the heat dissipation structure provided by the present invention, the heat dissipation structure further includes: a wind shielding member 41; an annular space is arranged in the accommodating cavity; the wiring channels 43 are arranged in the annular space and distributed along the annular space; the wind screen 41 is arranged in the annular space, and the space between the wiring channel 43 and the inner wall of the annular space is filled by the wind screen 41; in the extending direction of the annular space, the annular space is blocked by the wind shielding member 41 to form the arc-shaped cooling air duct 22. Therefore, the accommodating cavity is internally provided with an annular space, and the wiring channel 43 is very conveniently arranged along the annular space; the space between the wiring channel 43 and the inner wall of the annular space is filled by the wind shielding member 41; so that in the extending direction of the annular space, the annular space becomes an arc space under the partition of the wind shielding member 41, and the arc space is the cooling air duct 22; the air flow is prevented from circularly flowing in the annular space to generate circular flow.

Referring to fig. 1 to 12, as an embodiment of the heat dissipation structure provided by the present invention, the heat dissipation structure further includes: a lower wind shielding frame 44, a wire coil 42 having a wiring passage 43, and an upper wind shielding frame 45; the lower wind shielding frame 44, the wire coil 42 and the upper wind shielding frame 45 are respectively arranged from bottom to top in sequence; an annular space is formed between the lower wind shielding frame 44 and the upper wind shielding frame 45, and the wire coil 42 is positioned between the upper wind shielding frame 45 and the lower wind shielding frame 44. In this way, the lower wind blocking frame 44 and the lower wind blocking frame 44 can prevent the influence of the external air flow on the air flow in the cooling air duct 22.

In one embodiment, the upper wind-blocking frame 45 is a heat-insulating sheet. In one embodiment, above the thermal spacers are glass plates 62.

In one embodiment, the thermal spacers are mica plates. In one embodiment, the insulation sheet is conveniently provided with an insulation ring 66 for protection.

In one embodiment, the object 61 to be heated transfers heat to the insulating sheet through the glass plate 62. In one embodiment, the object 61 to be heated is a kettle or an iron pan.

In one embodiment, the lower wind shielding frame 44 is provided with air inlet holes 441 and air outlet holes 442, and the air flow enters the cooling air duct 22 through the air inlet holes 441 and exits the cooling air duct 22 through the air outlet holes 442. In one embodiment, the edges of the air inlet holes 441 are provided with air blocking ribs 443 to reduce air leakage.

In one embodiment, the outside of the annular space is retained by a first wind-deflecting strip 63 at the edge of the lower wind-deflecting bracket 44 and a second wind-deflecting strip 64 at the edge of the wire coil 42. In one embodiment, the underside of the annular space is blocked by a lower wind-shielding shelf 44. In one embodiment, the upper side of the annular space is blocked by an upper wind-shielding bracket 45.

In one embodiment, the drainage groove 444 is located on the top wall of the lower wind frame 44.

In one embodiment, the lower wind blocking frame 44 has a third wind blocking strip located at the edge of the wind outlet 121 of the fan 3 to prevent wind leakage.

Referring to fig. 1 to 12, as an embodiment of the heat dissipation structure provided by the present invention, a heat conducting element 51 for heat conducting connection with a power tube 52 is disposed on the air inlet duct 21 downstream of the fan 3; the heat conducting piece 51 is provided with a flow guide groove 511; the guiding groove 511 is communicated with the air inlet duct 21. Therefore, the heat-conducting member 51 contacts with the air flow in the air inlet duct 21, and the heat on the power tube 52 can enter the air inlet duct 21 through the heat-conducting member 51, that is, the heat on the heat-conducting member 51 can be taken away along with the air inlet duct 21, thereby facilitating the heat dissipation of the power tube 52.

In one embodiment, the thermal conductive member 51 is closely attached to the power tube 52 to facilitate heat transfer.

In one embodiment, the airflow passing through the heat-conducting member 51 flows upward and into the cooling air duct 22. Thus, the hot air flow passing through the heat conducting member 51 can be taken away as soon as possible.

In one embodiment, the number of power tubes 52 is plural.

Referring to fig. 1 to 12, as an embodiment of the heat dissipation structure provided by the present invention, the heat dissipation structure further includes: a second air outlet duct 24; the inlet of the second air outlet duct 24 is communicated with the air inlet duct 21 between the heat conducting member 51 and the fan 3; the second air outlet duct 24 has a first accommodating space for accommodating the power tube 52 therein. Thus, the air flow at the downstream of the fan 3 is divided into two paths, one path enters the cooling air duct 22, and the other path enters the second air outlet duct 24; when the airflow in the second air outlet duct 24 passes through the power tube 52, the heat of the power tube 52 can be dissipated, which is very convenient.

In one embodiment, the second outlet duct 24 may discharge the airflow in a straight direction.

In one embodiment, the cooling air duct 22 is located above the lower wind shielding frame 44, and the second air outlet duct 24 is located below the lower wind shielding frame 44, so as to block the mutual influence between the air flows of the two.

In one embodiment, the power transistor 52 and the rectifier bridge 53 are respectively disposed on an electronic board 65 (e.g., a PCB board).

In one embodiment, the rectifier bridge 53 dissipates heat through an aluminum block, which is provided with heat dissipation grooves.

Referring to fig. 1 to 12, as a specific embodiment of the heat dissipation structure provided in the present invention, a second accommodating space for placing the rectifier bridge 53 is provided in the second air outlet duct 24; the second accommodating space is positioned at the downstream of the first accommodating space. Therefore, the airflow in the second air outlet duct 24 can dissipate heat of the rectifier bridge 53 when passing through the rectifier bridge 53, which is very convenient.

Referring to fig. 1 to 12, as an embodiment of the heat dissipation structure provided by the present invention, an air inlet 111 is formed at the bottom of the housing 1, and the air inlet 111 is communicated with an inlet of the air inlet duct 21. Thus, the airflow enters from the bottom of the housing 1, and is not easily disturbed by the airflow around the outside.

Referring to fig. 1 to 12, as an embodiment of the heat dissipation structure provided by the present invention, an air outlet 442 inclined outward and downward is formed on a sidewall of the housing 1; the air outlet 442 communicates with the outlet of the first air outlet duct 23, and the air outlet 442 communicates with the outlet of the second air outlet duct 24. Thus, the first air outlet duct 23 and the second air outlet duct 24 can be discharged through outlet air; the air outlet 442 is inclined outward and downward to prevent moisture from entering the housing 1 through the air outlet 442.

In one embodiment, the outlet vents 442 are angled at an angle of 45 °.

In one embodiment, the first outlet duct 23 and the second outlet duct 24 are separated by a partition.

Referring to fig. 1 to 12, the induction cooker includes: coil 431 and heat dissipation structure; the coil 431 is arranged in the wiring channel 43. Thus, due to the adoption of the heat dissipation structure, the shell 1 is provided with the accommodating cavity; the accommodating cavity is respectively provided with an air inlet duct 21, a cooling duct 22 and a first air outlet duct 23; the airflow flows through the air inlet duct 21, the cooling duct 22 and the first air outlet duct 23 in sequence; the air flow has strong directionality in the flowing process, heat can be radiated along with the air flow, heat is not easy to accumulate, turbulent flow is not easy to occur, and the radiating efficiency is greatly improved; the housing 1 is provided with a wiring channel 43, and the coil 431 can be arranged along the wiring channel 43; heat exchange can be performed between a part of the wiring channel 43 and the cooling air duct 22, and the part of the wiring channel 43 extends along the cooling air duct 22 (assuming that the part of the wiring channel 43 which extends along the cooling air duct 22 and can perform heat exchange with the cooling air duct 22 is a predetermined cooling wiring section), so that in the process that the airflow flows along the cooling air duct 22, the airflow in the cooling air duct 22 can flow along the predetermined cooling wiring section and cool the coil 431 in the predetermined cooling wiring section, the heat entering the cooling air duct 22 on the coil 431 can be taken away along the cooling air duct 22, the heat can be discharged in time, and the heat dissipation efficiency is greatly improved.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. Heat radiation structure, its characterized in that includes: a housing having an accommodating chamber and a fan; an air inlet duct, a cooling duct and a first air outlet duct are arranged in the accommodating cavity; the air inlet duct, the cooling duct and the first air outlet duct are communicated in sequence; the fan is arranged in the air inlet duct; the shell is provided with a wiring channel for wiring coils; part of the wiring channel extends along the cooling air duct and can exchange heat with the cooling air duct.

2. The heat dissipating structure of claim 1, wherein the inner wall of the cooling air duct has a drainage groove extending along the cooling air duct.

3. The heat dissipation structure of claim 1, further comprising: a wind shielding member; an annular space is arranged in the accommodating cavity; the wiring channel is arranged in the annular space and distributed along the annular space; the wind shielding piece is arranged in the annular space, and the space between the wiring channel and the inner wall of the annular space is filled with the wind shielding piece; in the extending direction of the annular space, the annular space is partitioned by the wind shielding piece to form the arc-shaped cooling air duct.

4. The heat dissipation structure of claim 3, further comprising: the wire coil is provided with a wiring channel; the lower wind shielding frame, the wire coil and the upper wind shielding frame are sequentially arranged from bottom to top respectively; the lower wind shielding frame and the upper wind shielding frame form an annular space, and the wire coil is positioned between the upper wind shielding frame and the lower wind shielding frame.

5. The heat dissipating structure of claim 1, wherein the air inlet duct downstream of the fan is provided with a heat conducting member for heat conducting connection with the power tube; the heat conducting piece is provided with a flow guide groove; the diversion trench is communicated with the air inlet duct.

6. The heat dissipation structure of claim 5, further comprising: a second air outlet duct; the inlet of the second air outlet duct is communicated with the air inlet duct between the heat conducting piece and the fan; and a first accommodating space for accommodating the power tube is formed in the second air outlet duct.

7. The heat dissipation structure of claim 6, wherein the second air outlet duct has a second accommodating space for placing a rectifier bridge therein; the second accommodating space is located at the downstream of the first accommodating space.

8. The heat dissipating structure of claim 1, wherein the bottom of the housing has an air inlet, and the air inlet is connected to the inlet of the air inlet duct.

9. The heat dissipating structure of claim 1, wherein the sidewall of the housing has an air outlet inclined outward and downward; the air outlet hole is communicated with the outlet of the first air outlet duct, and the air outlet hole is communicated with the outlet of the second air outlet duct.

10. An induction cooker, characterized by comprising: a coil and the heat dissipation structure of any one of claims 1 to 9; the coil is arranged in the wiring channel.