CN216416881U

CN216416881U - Safe electric heating appliance

Info

Publication number: CN216416881U
Application number: CN202122551552.XU
Authority: CN
Inventors: 朱泽春; 祝利豪; 邹凌风; 朱继微
Original assignee: Joyoung Co Ltd
Current assignee: Joyoung Co Ltd
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2022-05-03
Anticipated expiration: 2031-10-22

Abstract

The utility model discloses an electric heating appliance safe in use, which belongs to the field of small household appliances and solves the problems of short circuit and burning of a circuit board caused by water inflow of an appliance body of the existing electric heating appliance, wherein the electric heating appliance comprises an appliance body and a cover body, the appliance body comprises a first shell and a second shell nested in the first shell, a circuit board and a heating element are arranged in a cavity enclosed by the first shell and the second shell, a mounting bracket for mounting the heating element is arranged at the bottom of the second shell, the circuit board is positioned below the mounting bracket, the bottom of the mounting bracket is provided with a flow guide surface connected with the side surface of the mounting bracket, the flow guide surface is transited from high to low from one end to the other end, the bottom surface projection of the low end of the flow guide surface is positioned outside the bottom surface projection of the circuit board, and water dropping from the low end of the flow guide surface can not flow onto the circuit board, thereby avoiding the problem of water inflow of the circuit board, and then reduced the risk that the short circuit of circuit board burns out, improved the electrical heating utensil security.

Description

Safe electric heating appliance

[ technical field ] A

The utility model relates to a small household electrical appliances field especially relates to safe in utilization's electrical heating utensil.

[ background ] A method for producing a semiconductor device

The electric heating lunch box is a small household appliance which achieves the purpose of heating and heat preservation by enabling high-temperature steam to be generated inside the lunch box after the heating element is electrified, and the electric heating lunch box has the main function of heating rice and dishes, so that the electric heating lunch box is much smaller in size than the traditional household electric rice cooker, and is convenient for office workers and outdoor people to carry and use.

The current electric heat lunch-box has the base of taking heating function usually, and is specific: the base adopts the design of inside and outside double-deck casing, and devices such as heating element, circuit board are installed in the cavity that inside and outside double-deck casing encloses, and the lateral wall junction of inside and outside casing does not generally do sealing treatment, has the problem of intaking in the use, leads to the problem such as circuit board short circuit machine burning and the inside ponding of base easily.

[ Utility model ] content

The object of the present invention is to provide an electric heating appliance which is safe in use and which at least partially solves the above mentioned technical problems.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the electric heating appliance safe to use comprises an appliance body and a cover body, wherein the appliance body comprises a first shell and a second shell nested in the first shell, a circuit board and a heating element are arranged in a cavity defined by the first shell and the second shell, an installation support used for installing the heating element is arranged at the bottom of the second shell, the circuit board is positioned below the installation support, a flow guide surface connected with the side surface of the installation support is arranged at the bottom of the installation support, the flow guide surface is transited from high to low from one end to the other end, and the bottom surface projection of the low end of the flow guide surface is positioned outside the bottom surface projection of the circuit board.

In the electric heating appliance safe in use, the flow guide surfaces are arranged in pairs and distributed in a splayed shape.

In the electric heating appliance safe in use, the transition plane is connected between the high ends of the two flow guide surfaces, and the lead for electrically connecting the circuit board and the heating element is limited on the transition plane.

In the above-mentioned safe electric heater, the bottom of the mounting bracket is provided with the flow guide surfaces on two opposite sides.

In the above-mentioned safety electric heater, the bottom projection of the flow guide surface is located outside the bottom projection of the circuit board.

In the above-mentioned safe electric heating appliance, the flow guide surface is an inclined surface or an arc-shaped curved surface.

In the above safe electric heater, the bottom surface of the mounting bracket extends downwards to form a first convex rib, the bottom surface of the first convex rib forms the flow guide surface, and the side surface of the first convex rib is flush with the side surface of the mounting bracket.

In the above safe electric heater, the bottom surface of the mounting bracket extends downwards to form a second convex rib, the first convex rib is arranged along the length direction of the mounting bracket, the second convex rib is arranged along the width direction of the mounting bracket, and one end of the bottom surface of the second convex rib is connected with the lower end of the flow guide surface.

In the above-mentioned safe electric heating appliance, a drain hole is provided on the bottom wall of the first casing.

In the above electric heating appliance safe in use, the drain hole is located below the lower end of the flow guide surface.

The utility model has the advantages that:

the utility model provides an electric heating appliance, the bottom of installing support is provided with the flow guiding surface connected with the side of installing support, the flow guiding surface is transited from high to low from one end to the other end, when the water seeping into the appliance body flows down on the installing support, the water can flow down to the flow guiding surface along the side of installing support, the water flows from high to low along the flow guiding surface under the action of gravity; because the bottom surface projection of the lower end of the flow guide surface is positioned outside the bottom surface projection of the circuit board, water dripping from the lower end of the flow guide surface cannot flow onto the circuit board, so that the problem of water inflow of the circuit board is avoided, the risk of short circuit burning of the circuit board is reduced, and the safety of the electric heating appliance is improved. In the above scheme, the mounting bracket is used for mounting the heating element and belongs to the original parts of the electric heating appliance, and the designed circuit water-inlet-proof scheme does not need to add new parts, thereby saving the cost.

Furthermore, the flow guide surfaces are arranged in pairs and distributed in a splayed shape. The flow guide area is increased, the water guide effect is enhanced, and the symmetrical distribution structure is convenient to manufacture.

Furthermore, a transition plane is connected between the high ends of the two flow guide surfaces, and a lead for electrically connecting the circuit board and the heating element is limited on the transition plane. The concave space formed by the two flow guide surfaces and the transition plane facilitates the installation and positioning of the wire, and the wire passing through the transition plane is limited by the flow guide surfaces on the two sides and cannot shake randomly.

Furthermore, the two opposite sides of the bottom of the mounting bracket are provided with the flow guide surfaces. The flow guide area is increased, and the water guide effect is enhanced.

Furthermore, a first convex rib extends downwards from the bottom surface of the mounting bracket, the bottom surface of the first convex rib forms the flow guide surface, and the side surface of the first convex rib is flush with the side surface of the mounting bracket. The bottom surface of the first convex rib is higher than the bottom surface of the mounting bracket, and the flow guide surface can well prevent water from flowing to the bottom surface of the mounting bracket under the action of surface tension, so that the risk of water inflow of the circuit board is increased.

Furthermore, a second convex rib extends downwards from the bottom surface of the mounting bracket, the first convex rib is arranged along the length direction of the mounting bracket, the second convex rib is arranged along the width direction of the mounting bracket, and one end of the bottom surface of the second convex rib is connected with the low end of the flow guide surface. Because the bottom surface projection of the lower end of the flow guide surface is positioned outside the bottom surface projection of the circuit board, the bottom surface projection of the second convex rib arranged along the width direction of the mounting bracket is also positioned outside the bottom surface projection of the circuit board, when water flows to the bottom surface of the mounting bracket from two sides in the length direction of the mounting bracket, the water is prevented from continuously flowing to the middle by the blocking of the second convex rib, and the risk of water inflow of the circuit board is increased.

Furthermore, a drain hole is formed in the bottom wall of the first shell. The water dropping from the lower end of the flow guide surface flows onto the first shell and is discharged out of the first shell through the water discharge hole, so that water is prevented from accumulating inside the appliance body.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

The invention is further described with reference to the accompanying drawings:

FIG. 1 is a schematic cross-sectional view of an electric heating appliance according to an embodiment of the present invention;

FIG. 2 is a schematic view of an electric heating appliance according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2;

fig. 4 is a first perspective view of a mounting bracket according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of a mounting bracket according to an embodiment of the present invention.

Reference numerals:

100 a cover body;

200 apparatus body, 210 first shell, 211 water drain hole, 220 second shell, 230 inner container

300 mounting brackets, 310 first convex ribs, 311 flow guide surfaces, 312 transition planes and 320 second convex ribs;

400 circuit board;

500 heat conducting plates;

600 pressing plates;

700 heating element, 710 wire.

[ detailed description ] embodiments

The utility model provides an electric heating appliance safe in utilization, including utensil body and lid, the utensil body include first casing and nested in second casing in the first casing, first casing with be equipped with circuit board and heating element in the cavity that the second casing encloses, second casing bottom is equipped with the installing support that is used for installing heating element, the circuit board is located the installing support below, the bottom of installing support is equipped with the water conservancy diversion face that meets with the installing support side, the water conservancy diversion face passes through to the other end by high to low from its one end, the bottom surface projection of the low side of water conservancy diversion face is located the bottom surface projection outside of circuit board. When water permeating into the appliance body flows onto the mounting bracket, the water flows downwards along the side surface of the mounting bracket to the flow guide surface, and the water flows along the flow guide surface from the high end to the low end under the action of gravity; because the bottom surface projection of the lower end of the flow guide surface is positioned outside the bottom surface projection of the circuit board, water dripping from the lower end of the flow guide surface cannot flow onto the circuit board, so that the problem of water inflow of the circuit board is avoided, the risk of short circuit burning of the circuit board is reduced, and the safety of the electric heating appliance is improved; the mounting bracket is used for mounting a heating element and belongs to an original part of an electric heating appliance, and the designed circuit water-inlet-preventing scheme does not need to add new parts, so that the cost is saved.

The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

The appearances of the phrases such as "exemplary," "some embodiments," and the like in the following text are intended to mean "serving as an example, embodiment, or illustration," and any embodiment described as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the present invention has been described with reference to certain embodiments, it will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details.

Referring to fig. 1 to 3, an electric heating appliance safe in use provided in an embodiment of the present invention includes an appliance body 200 and a cover 100, the appliance body 200 includes a first housing 210 and a second housing 220 nested in the first housing 210, a circuit board 400 and a heating element 700 are disposed in a cavity enclosed by the first housing 210 and the second housing 220, a mounting bracket 300 for mounting the heating element 700 is disposed at the bottom of the second housing 220, and the circuit board 400 is located below the mounting bracket 300.

Taking the electric heating lunch box as an example for further explanation, on the basis of the above scheme, the electric heating lunch box further comprises an inner container 230, the inner container 230 can be placed in the second casing 220 in a pick-and-place manner, the cover body 100 covers the appliance body 200 and seals the container opening of the inner container 230, the bottom of the second casing 220 is provided with a heat conducting plate 500, the heating element 700 is pressed on the lower surface of the heat conducting plate 500 by a pressing plate 600, two ends of the pressing plate 600 are fixed by mounting brackets 300, the pressing state of the pressing plate 600 on the heating element 700 is maintained, and the mounting of the heating element 700 is realized.

As described above, the circuit board 400 is disposed on one of the mounting brackets 300, and the heat generating element 700 is connected to the circuit board 400 by the wire 710. As can be seen from fig. 1, after the circuit board 400 is mounted, the circuit board 400 is located below the mounting bracket 300, when the electric-heating lunch box is used, a water inlet risk exists at a joint (B in fig. 1) of the side walls of the first casing 210 and the second casing 220, water seeping into the appliance body 200 flows onto the mounting bracket 300 along the outer wall of the second casing 220, and then flows downwards along the side surface of the mounting bracket 300, and after the circuit board 400 is mounted, the circuit board 400 is located below the mounting bracket 300, so that the water inlet risk of the circuit board 400 is increased.

In view of the above problems, referring to fig. 4 and 5, in the present embodiment, the bottom of the mounting bracket 300 is provided with a flow guiding surface 311 connected to the side surface of the mounting bracket 300, the flow guiding surface 311 transitions from high to low from one end to the other end, when water seeping into the appliance body 200 flows onto the mounting bracket 300, the water flows down along the side surface of the mounting bracket 300 to the flow guiding surface 311, and the water flows along the flow guiding surface 311 from the high end a to the low end b under the action of gravity; because the bottom projection of the lower end b of the diversion surface 311 is positioned outside the bottom projection of the circuit board 400, water dripping from the lower end b of the diversion surface 311 cannot flow onto the circuit board 400, thereby avoiding the problem of water inflow of the circuit board 400, further reducing the risk of short-circuit burning of the circuit board 400 and improving the safety of the electric heating appliance; according to the scheme, the mounting bracket 300 is matched with the pressing plate 600 to mount the heating element 700, and belongs to the original parts of the electric heating appliance, so that the circuit water-inlet-preventing scheme designed by the embodiment does not need to add new parts, and the cost is saved.

In a specific embodiment, the diversion surface 311 is configured as an inclined surface, and the inclined surface gradually inclines from the middle of the mounting bracket 300 to the two ends, and keeps a smaller inclination angle, so as to smoothly guide the water on the diversion surface 311 to the lower end b of the diversion surface 311. Besides the inclined surface, the diversion surface 311 may also be an arc-shaped curved surface or other curved surfaces with height and fall.

As a preferable scheme: the bottom surface projection of the guide surface 311 is located outside the bottom surface projection of the circuit board 400, water at any position on the guide surface 311 cannot directly drip onto the circuit board 400, and the water-proof effect of the circuit board 400 is better.

As a preferable scheme: referring to fig. 4 and 5, the diversion surfaces 311 are arranged in pairs and distributed in a splayed shape, so that the diversion surface 311 is increased, the water diversion effect is enhanced, and the symmetrical distribution structure is convenient to manufacture.

As a more preferable embodiment: referring to fig. 3 and 5, a transition plane 312 is connected between the high ends a of the two flow guide surfaces 311, and a lead 710 for electrically connecting the circuit board 400 and the heating element 700 is limited on the transition plane 312. The two guide surfaces 311 and the transition plane 312 form a concave space, which facilitates the installation and positioning of the wire 710, and the wire 710 passing through the transition plane 312 is limited by the guide surfaces 311 on the two sides and cannot swing freely.

Referring to fig. 4 and 5, in an embodiment of the present invention, the bottom of the mounting bracket 300 is provided with flow guiding surfaces 311 on two opposite sides. The water seeping into the appliance body 200 flows along the outer wall of the second casing 220 to the mounting bracket 300, and in the absence of any water guiding structure on the upper surface of the mounting bracket 300, there may be water flows (as shown by arrows in fig. 4) on two opposite sides of the mounting bracket 300. When the guide surfaces 311 are disposed on two opposite sides of the bottom of the mounting bracket 300, water flowing down from two sides of the mounting bracket 300 can be prevented from entering the circuit board 400. The flow guiding surface 311 may be arranged in a specific manner according to the foregoing embodiments.

Referring to fig. 3 and 5, in an embodiment of the present invention, a first rib 310 extends downward from a bottom surface of the mounting bracket 300, a flow guiding surface 311 is formed on the bottom surface of the first rib 310, and a side surface of the first rib 310 is flush with a side surface of the mounting bracket 300; as can be seen from fig. 5, the bottom surface of the first rib 310 is higher than the bottom surface of the mounting bracket 300, so that the flow guiding surface 311 is provided to prevent water from flowing to the bottom surface of the mounting bracket 300 due to surface tension, thereby increasing the risk of water entering the circuit board 400.

In this embodiment, the first ribs 310 are disposed along the length direction of the mounting bracket 300, the bottom surface of the first ribs 310 forms the flow guiding surfaces 311, water flowing down from the two lateral surfaces of the mounting bracket 300 in the width direction is guided by the flow guiding surfaces 311 to flow to the lower end b thereof, the circuit board 400 is generally located below the middle portion of the mounting bracket 300, and the two flow guiding surfaces 311 distributed in a splay shape extend from the middle portion of the mounting bracket 300 to the two ends of the mounting bracket in the length direction, so as to prevent the water flowing down from the two lateral surfaces of the mounting bracket 300 in the width direction from entering the circuit board 400.

Although both side surfaces of the mounting bracket 300 in the longitudinal direction may also flow water, since the circuit board 400 is located below the middle portion of the mounting bracket 300, the circuit board 400 is farther away from both side surfaces of the mounting bracket 300 in the longitudinal direction than both side surfaces of the mounting bracket 300 in the width direction, and water flowing down from both side surfaces of the mounting bracket 300 in the longitudinal direction may not easily reach the position of the circuit board 400. Even so, the present embodiment provides a better solution: referring to fig. 3 and 5, a second rib 320 extends downward from the bottom surface of the mounting bracket 300, the second rib 320 is disposed along the width direction of the mounting bracket 300, one end of the bottom surface of the second rib 320 is connected to the lower end b of the diversion surface 311, because the bottom projection of the lower end b of the diversion surface 311 is located outside the bottom projection of the circuit board 400, the bottom projection of the second rib 320 disposed along the width direction of the mounting bracket 300 is also located outside the bottom projection of the circuit board 400, when water flows to the bottom surface of the mounting bracket 300 from both sides in the length direction, the water is prevented from flowing to the middle by the blocking of the second rib 320, and the risk of water inflow of the circuit board 400 is increased.

Referring to fig. 2, in an embodiment of the present invention, on the basis of any of the above embodiments, the bottom wall of the first casing 210 is provided with a drainage hole 211, water dropping from the lower end of the flow guiding surface 311 flows onto the first casing 210, and then the first casing 210 is drained through the drainage hole 211, so as to prevent water from accumulating inside the appliance body 200.

As a preferable scheme: the drainage holes 211 are located below the lower end of the flow guiding surface 311, and it should be noted that, in order to achieve a better drainage effect, a plurality of drainage holes 211 are usually dispersedly disposed on the bottom wall of the first casing 210, for example, as shown in fig. 2 and 3, the drainage holes 211 are disposed at four corner portions of the bottom wall of the first casing 210, and the circuit board 400 is mounted on the mounting bracket 300 on the right side, so that the two drainage holes 211 on the right side of the bottom wall of the first casing 210 are located below the lower ends b of the two flow guiding surfaces 311, respectively, thereby shortening a drainage path and draining accumulated water quickly.

The electric heating device of the utility model is a series of small cooking devices such as mini rice cooker, stewing cup, heat preservation bowl, etc. the scheme of the embodiment can be applied to small cooking devices such as mini rice cooker, stewing cup, heat preservation bowl, etc. besides the electric heating lunch box.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims

1. The electric heating appliance is characterized in that a flow guide surface connected with the side surface of the mounting support is arranged at the bottom of the mounting support, the flow guide surface is transited from high to low from one end to the other end of the flow guide surface, and the bottom surface projection of the lower end of the flow guide surface is positioned outside the bottom surface projection of the circuit board.

2. A safe-to-use electric heating device as claimed in claim 1, wherein the flow-guiding surfaces are arranged in pairs and distributed in a splayed shape.

3. A safe-to-use electric heating device as claimed in claim 2, wherein a transition plane is connected between the high ends of the two flow guiding surfaces, and a lead for electrically connecting the circuit board and the heating element is limited on the transition plane.

4. A safe-to-use electric heating device as claimed in claim 1, wherein the deflector surfaces are provided on opposite sides of the bottom of the mounting bracket.

5. A safety electric heating appliance as claimed in claim 1, wherein the horizontal projection of the deflector surface is located outside the horizontal projection of the circuit board.

6. A safe-to-use electric heating device as claimed in claim 1, wherein the deflector surface is a slanted surface or an arc-shaped curved surface.

7. A safe-to-use electric heating device as claimed in any one of claims 1 to 6, wherein the bottom surface of the mounting bracket extends downwardly to form a first rib, the bottom surface of the first rib forms the flow guide surface, and the side surface of the first rib is flush with the side surface of the mounting bracket.

8. The electric heating appliance according to claim 7, wherein a second rib extends downward from the bottom surface of the mounting bracket, the first rib is disposed along the length direction of the mounting bracket, the second rib is disposed along the width direction of the mounting bracket, and one end of the bottom surface of the second rib is connected to the lower end of the flow guiding surface.

9. A safe-to-use electric heating device as claimed in any one of claims 1 to 6, wherein the bottom wall of the first housing is provided with a drainage hole.

10. A safety electric heating device as in claim 9, wherein said drain hole is located below the lower end of said deflector surface.