CN220212643U - Electric chafing dish - Google Patents

Abstract

The utility model discloses an electric chafing dish, comprising: a base; the pot body is arranged in the base; the electric heating film is coated on the outer surface of the pot body and comprises an inner insulating layer, a heating coating, a conductive coating and an outer insulating layer which are stacked in the thickness direction, wherein the heating coating and the conductive coating are positioned between the inner insulating layer and the outer insulating layer, and the inner insulating layer is in direct contact with the outer surface of the pot body. Therefore, the electrothermal film and the pot body can be kept in close contact, both the electrothermal efficiency and the heat transfer efficiency are improved, and the heating of food materials in the pot body is more balanced; in addition, the inner insulating layer and the outer insulating layer can effectively protect the heating coating and the conductive coating and improve the insulating property of the heating coating and the conductive coating in the use process so as to prolong the service life; importantly, the electric heating film and the pot body are firmly attached and fixed by adopting a coating mode, and even if each coating of the electric heating film and the base material of the pot body have inconsistent expansion coefficients, the electric heating film cannot fall off from the pot body after being repeatedly heated.

Description

Electric chafing dish

Technical Field

The utility model relates to the technical field of kitchen appliances, in particular to an electric chafing dish.

Background

The electric chafing dish is used as a kitchen ware which is very widely used, is deeply favored by consumers, has the functions of steaming, boiling, frying and the like, and mainly comprises a base, a pot body, a steamer, a pot cover and the like, wherein water or oil is added into the pot body, and the pot body is heated by a heating system so as to cook various delicious foods. The heating of the existing electric chafing dish is usually realized by adopting a mode of arranging an electric heating tube, however, the mode of arranging the electric heating tube has the following defects:

1. when the heating speed is low and the electric heating tube heats, heat generated by the heating of the resistance wire after being electrified needs to pass through magnesium powder and the tube body and then is transferred to the pot body, a certain gap exists between the electric heating tube and the pot body, and the heat transfer efficiency is low;

2. the electric heating efficiency is low, the quality and the density of the magnesium powder directly influence the electric heating efficiency of the electric heating pipe, and the process requirement on filling the magnesium powder is high;

3. when the electric heating tube is used for heating, the temperature of the area of the bottom of the pot along the arrangement track of the electric heating drum is highest, the temperature of the area far away from the arrangement track of the electric heating drum is low, and the cooking effect on food materials is greatly affected.

Disclosure of Invention

In order to overcome at least one of the defects in the prior art, the utility model provides an electric chafing dish, which aims to solve the problems of lower heat transfer efficiency and lower electric heating efficiency of the existing electric chafing dish and solve the problem of uneven heating of food materials by the existing electric chafing dish.

The utility model adopts the technical proposal for solving the problems that:

an electric chafing dish comprising: a base; the pot body is arranged in the base; the electric heating film is coated on the outer surface of the pot body, the electric heating film comprises an inner insulating layer, a heating coating, a conductive coating and an outer insulating layer which are stacked in the thickness direction, the heating coating and the conductive coating are positioned between the inner insulating layer and the outer insulating layer, and the inner insulating layer is in direct contact with the outer surface of the pot body so that the heating coating and the conductive coating are insulated from the pot body.

According to the electric chafing dish provided by the utility model, the electric heating film is coated on the outer surface of the pot body, so that on one hand, the electric heating film can be uniformly distributed on the outer surface of the pot body, the electric heating film can be tightly contacted with the pot body, the electric heating efficiency and the heat transfer efficiency are both improved, and the heating of food materials in the pot body is more balanced; on the other hand, the inner insulating layer can insulate the heating coating and the conductive coating from the pot body, and the outer insulating layer can insulate the heating coating and the conductive coating from the base, so that the heating coating and the conductive coating can be effectively protected, the insulating performance of the heating coating and the conductive coating in the use process can be improved, and the service life can be prolonged; more importantly, the electric heating film is directly coated on the outer surface of the pot body, so that the electric heating film and the pot body are firmly attached and fixed, and even if each coating of the electric heating film has inconsistent expansion coefficients with the base material of the pot body, the electric heating film cannot fall off from the pot body after being repeatedly heated.

According to some embodiments of the utility model, the outer surface of the pan body comprises a lower bottom surface opposite to the base, the electrothermal film is coated on the lower bottom surface, and the inner insulating layer is in direct contact with the lower bottom surface.

According to some embodiments of the utility model, the inner insulating layer, the heat generating coating layer, the conductive coating layer, and the outer insulating layer are sequentially stacked.

According to some embodiments of the utility model, the electric chafing dish further comprises an electric connection piece for connecting to a power source; the conductive coating layer comprises a first electrode part and a second electrode part, wherein the first electrode part is provided with a first contact part exposed out of the outer insulating layer in a first direction, the second electrode part is provided with a second contact part exposed out of the outer insulating layer in a first direction, and the first direction is the length direction or the width direction of the outer insulating layer; the first contact portions and the second contact portions are connected to the two electric connecting pieces in a one-to-one correspondence.

According to some embodiments of the utility model, the heat-generating coating has opposite first and second peripheral edges, the body of the first electrode portion being a first body portion and the body of the second electrode portion being a second body portion, the first body portion extending along the first peripheral edge and the second body portion extending along the second peripheral edge.

According to some embodiments of the utility model, the electrical connection pieces have elasticity, and the two electrical connection pieces are configured to be abutted against the first contact portions and the second contact portions in a one-to-one correspondence under the action of the elasticity of the electrical connection pieces.

According to some embodiments of the utility model, the electric chafing dish further comprises an insulating support, the insulating support is arranged on the periphery of the lower bottom surface, and the electric connecting sheet is arranged on the insulating support.

According to some embodiments of the utility model, the first contact portion and the second contact portion extend toward the two electrical connection pieces in a one-to-one correspondence.

According to some embodiments of the utility model, the first electrode portion and the second electrode portion are disposed opposite to each other and each have an L-shape, and the first contact portion and the second contact portion extend toward each other.

According to some embodiments of the utility model, the electric chafing dish further comprises a fixing frame and a temperature control device, wherein the fixing frame is connected to the lower bottom surface, a connection point of the fixing frame and the lower bottom surface is located at the periphery of the lower bottom surface, the temperature control device is arranged on the fixing frame, and the temperature control device is in contact with the electric heating film.

Drawings

FIG. 1 is a schematic view of an electric chafing dish according to an embodiment of the utility model;

FIG. 2 is a schematic diagram of a combination structure of a pan body and a heating film according to an embodiment of the present utility model;

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

fig. 4 is a schematic view showing an inverted state of a pot (outer insulation layer is not shown) according to an embodiment of the present utility model;

FIG. 5 is a schematic view of an insulating support according to an embodiment of the present utility model;

FIG. 6 is a schematic cross-sectional structure of an electric chafing dish according to an embodiment of the utility model;

FIG. 7 is an enlarged view of part B of FIG. 6;

FIG. 8 is a schematic view showing an inverted state of the base according to the embodiment of the present utility model;

fig. 9 is a partial enlarged view of a portion C in fig. 8.

Wherein the reference numerals have the following meanings:

the device comprises a base, a positioning table, a 12-heat insulation sleeve, a 13-wiring cavity, a 131-paying-off seat, a 132-U-shaped wire slot, a 133-separation rib, a 14-wire pressing cover, a 15-wire through hole, a 2-pot body, a 21-lower bottom surface, a 22-positioning column, a 3-electric heating film, a 31-inner insulating layer, a 32-heating coating, a 33-conductive coating, a 331-first electrode part, a 3311-first contact part, a 3312-first main body part, a 332-second electrode part, a 3321-second contact part, a 3322-second main body part, a 34-outer insulating layer, a 4-electric connecting sheet, a 5-insulating support, a 51-connecting groove, a 52-clamping notch, a 6-fixing frame, a 7-temperature control device, an 8-safety device and a 9-control panel.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

The utility model is described in further detail below with reference to the accompanying drawings.

Referring to fig. 1 to 4, the utility model discloses an electric chafing dish, which comprises a base 1, a pan body 2 and an electric heating film 3; the pot body 2 is arranged in the base 1; the electrothermal film 3 is coated on the outer surface of the pot body 2, and the electrothermal film 3 comprises an inner insulating layer 31, a heating coating 32, a conductive coating 33 and an outer insulating layer 34 which are laminated in the thickness direction, wherein the heating coating 32 and the conductive coating 33 are positioned between the inner insulating layer 31 and the outer insulating layer 34, and the inner insulating layer 31 is in direct contact with the outer surface of the pot body 2. Preferably, the electrothermal film 3 may be sprayed or printed on the outer surface of the pot 2.

By adopting the scheme, on one hand, the electrothermal film 3 can be uniformly distributed on the outer surface of the pot body 2, the electrothermal film 3 and the pot body 2 can be kept in close contact, both the electrothermal efficiency and the heat transfer efficiency are improved, and the heating of food materials in the pot body 2 is more balanced; on the other hand, the inner insulating layer 31 can insulate the heating coating 32 and the conductive coating 33 from the pot body 2, and the outer insulating layer 34 can insulate the heating coating 32 and the conductive coating 33 from the base 1, so that the heating coating 32 and the conductive coating 33 can be effectively protected, and the insulating performance of the heating coating 32 and the conductive coating 33 in the use process can be improved, so that the service life can be prolonged; more importantly, the electrothermal film 3 is directly coated on the outer surface of the pot body 2, so that the adhesion and fixation between the electrothermal film 3 and the pot body 2 are firmer, and even if each coating of the electrothermal film 3 and the base material of the pot body 2 have inconsistent expansion coefficients, the electrothermal film 3 can not fall off from the pot body 2 after being repeatedly heated.

Specifically, in the present embodiment, the outer surface of the pan body 2 includes the lower bottom surface 21 opposite to the base 1, preferably, in order to ensure the cooking effect on the food material in the pan body 2, the electrothermal film 3 is coated on the lower bottom surface 21, and the inner insulating layer 31 is in direct contact with the lower bottom surface 21, so that the heat generated by the electrothermal film 3 can be more uniformly and sufficiently transferred to the pan body 2 than when the electrothermal film 3 is coated on the outer circumferential side of the pan body 2. Indeed, in some other embodiments, the electrothermal film 3 may be coated on the outer periphery of the pan body 2, which is selected according to practical needs.

As shown in fig. 3, preferably, in the present embodiment, the inner insulating layer 31, the heat generating coating layer 32, the conductive coating layer 33 and the outer insulating layer 34 are sequentially arranged and laminated, so that, compared with the case where the inner insulating layer 31, the conductive coating layer 33, the heat generating coating layer 32 and the outer insulating layer 34 are sequentially arranged and laminated, the conductive coating layer 33 can be prevented from affecting the heat transfer between the inner insulating layer 31 and the heat generating coating layer 32, thereby ensuring that the heat generated by the heat generating coating layer 32 can be directly transferred to the pot body 2 through the inner insulating layer 31, so that the heat generated by the heat generating coating layer 32 can be further uniformly and sufficiently transferred to the pot body 2. Indeed, in some other embodiments, the inner insulating layer 31, the conductive coating 33, the heating coating 32, and the outer insulating layer 34 may be sequentially stacked, and may be selected according to practical requirements.

As shown in fig. 4, in particular, in the present embodiment, the electric chafing dish further includes an electric connection piece 4 for connecting to a power source, the conductive coating 33 is electrically connected to the electric connection piece 4 and the heat-generating coating 32, respectively, and the conductive coating 33 can function as an electrode to enable the heat-generating coating 32 to be energized to generate heat to transfer heat to the pot body 2; more specifically, the conductive coating 33 includes a first electrode portion 331 and a second electrode portion 332, and preferably, in the present embodiment, in order to facilitate the electrical connection between the electrical connection pad 4 and the conductive coating 33, the first electrode portion 331 has a first contact portion 3311 exposed to the outer insulating layer 34 in a first direction, and the second electrode portion 332 has a second contact portion 3321 exposed to the outer insulating layer 34 in the first direction, the first direction being a length direction or a width direction of the outer insulating layer 34; the first contact portions 3311 and the second contact portions 3321 are connected to the two electric connection pieces 4 in a one-to-one correspondence manner, so that the electric connection pieces 4 do not need to be destructively inserted between the inner insulating layer 31 and the outer insulating layer 34 by exposing the first contact portions 3311 and the second contact portions 3321 to the outer insulating layer 34, and therefore, on one hand, the electric heating film 3 can be prevented from being damaged due to the electric connection between the electric connection pieces 4 and the electric connection pieces 33, and on the other hand, the electric connection between the electric connection pieces 4 and the electric connection pieces 33 can be more convenient and stable.

It can be understood that if the electric connection piece 4 and the conductive coating 33 are connected by means of adhesion, the problem of poor contact or falling off between the electric connection piece 4 and the conductive coating 33 easily occurs after being subjected to long-term cold and hot impact; if the electrical connection piece 4 and the conductive coating 33 are connected by screwing, holes or screws need to be formed in the corresponding areas of the pot 2 where the first contact portion 3311 and the second contact portion 3321 are provided, which will affect at least the spraying or printing of the conductive coating 33, and even the overall spraying or printing of the electrothermal film 3.

Therefore, preferably, in order to solve the above-mentioned problem, in the present embodiment, the electrical connection pieces 4 have elasticity, and the two electrical connection pieces 4 are configured to be abutted against the first contact portion 3311 and the second contact portion 3321 in a one-to-one correspondence under the action of the own elasticity, so that even if thermal expansion deformation occurs, the electrical connection pieces 4 can be well kept abutted against the conductive coating 33 under the action of the elasticity, the electrical connection pieces 4 and the conductive coating 33 can be kept in good contact all the time, and there is no need to open holes or provide screw posts on the areas of the pan body 2 where the first contact portion 3311 and the second contact portion 3321 are correspondingly provided, and the main area of the lower bottom surface 21 of the pan body 2 can be kept flat, which is beneficial to the spraying or printing of the whole of the electrothermal film 3.

As shown in fig. 4 and 5, in particular, in this embodiment, the electric chafing dish further includes an insulating support 5, the insulating support 5 is disposed at the periphery of the lower bottom 21, and two electric connection pieces 4 are disposed at two side portions of the insulating support 5 in a one-to-one correspondence manner, so that one end portion of the electric connection piece 4 can be fixed on the insulating support 5, so that the other end portion of the electric connection piece 4 and the conductive coating 33 can be kept in elastic abutting contact; more importantly, the insulating support 5 is disposed at the periphery of the lower bottom surface 21, so that the main area of the lower bottom surface 21 is kept flat compared with the area of the lower bottom surface 21, which is close to the middle, thereby reducing the influence on the spraying or printing of the electrothermal film 3 and being beneficial to the whole spraying or printing of the electrothermal film 3.

Preferably, in this embodiment, two connecting grooves 51 are further provided on the insulating support 5, and one ends of the two electric connection pieces 4 are respectively embedded in the two connecting grooves 51 in a one-to-one correspondence manner, so that a stable connection is formed between the electric connection pieces 4 and the insulating support 5, and thus, the problem that the electric connection pieces 4 are dislocated or loose in the assembly of the insulating support 5 can be avoided.

Further, in this embodiment, the slot wall of the connecting slot 51 is further provided with a clamping notch 52, one end of the electrical connection piece 4 is an L-shaped end, and the L-shaped end can be embedded in the connecting slot 51 and pass through the clamping notch 52 of the connecting slot 51 to further improve the connection stability between the electrical connection piece 4 and the insulating support 5, specifically, the L-shaped end includes a first side section and a second side section connected end to end, the first side section is embedded in the connecting slot 51, and the second side section passes through the clamping notch 52 of the connecting slot 51 to form a stable clamping connection. More specifically, the connecting groove 51 includes a bottom wall and two side walls, the side walls are opposite, the bottom wall is connected between the side walls, in this embodiment, the clamping notch 52 is disposed on one side wall, it should be noted that, in some other embodiments, the clamping notch 52 may be disposed on the bottom wall, and may be selected according to practical requirements.

Referring to fig. 4, specifically, in the present embodiment, the heat generating coating 32 has a first peripheral edge and a second peripheral edge opposite to each other, the main body of the first electrode portion 331 is a first main body portion 3312, the main body of the second electrode portion 332 is a second main body portion 3322, the first main body portion 3312 is connected to the first contact portion 3311, the second main body portion 3322 is connected to the second contact portion 3321, and the heat generating coating 32 has a plurality of loops corresponding to series and/or parallel between the first peripheral edge and the second peripheral edge; preferentially, in this embodiment, the first body portion 3312 extends along the first periphery, and the second body portion 3322 extends along the second periphery, so that, on one hand, a certain distance is kept between the first body portion 3312 and the second body portion 3322, so as to avoid a short circuit between the first electrode portion 331 and the second electrode portion 332, and on the other hand, all loops of the heat-generating coating 32 between the first periphery and the second periphery participate in the electric conduction and heat generation, so that the utilization rate and the heat-generating efficiency of the heat-generating coating 32 are at a higher level. In some other embodiments, the first body portion 3312 and the second body portion 3322 may be connected to the region near the middle of the heat-generating coating 32, which may be selected according to practical requirements.

More specifically, in the present embodiment, the heat-generating coating 32 is rectangular to match the shape of the lower bottom 21 of the pot 2, and indeed, in some other embodiments, the heat-generating coating 32 may be, but is not limited to, trapezoidal, circular, etc., and may be selected according to the actual needs, which is not limited only herein.

Referring to fig. 4, in the present embodiment, preferably, in order to enable good contact between the conductive coating 33 and the electrical connection pads 4, the first contact portions 3311 and the second contact portions 3321 extend toward the two electrical connection pads 4 in a one-to-one correspondence. Preferably, in the present embodiment, the first electrode portion 331 and the second electrode portion 332 are disposed opposite to each other and each have an L-shape, the first body portion 3312 and the second body portion 3322 are parallel to each other, and the first contact portion 3311 and the second contact portion 3321 extend toward each other, so that the space between the first contact portion 3311 and the second contact portion 3321 is reduced but a certain value can be maintained, thereby avoiding a short circuit between the first contact portion 3311 and the second contact portion 3321, ensuring that good contact can be formed between the conductive coating 33 and the electrical connection sheet 4, and having a simple structure, convenient production, and easy function implementation.

As shown in fig. 1 and 4, further, in this embodiment, in order to implement intelligent control on the electrothermal film 3, the electric chafing dish further includes a temperature control device 7, a safety device 8, and a control panel 9, where the temperature control device 7 and the safety device 8 can both detect the real-time temperature of the electrothermal film 3 and can intelligently control the working state of the electrothermal film 3 according to the real-time temperature of the electrothermal film 3 and according to a preset program in the control panel 9; specifically, when the electric chafing dish starts to cook food, the heating coating 32 can be powered on through the conductive coating 33 and the electric connection piece 4, the heating coating 32 converts electric energy into heat energy and transfers the heat to the pan body 2 in a heat conduction mode, so that the temperature of the pan body 2 is increased to heat the food in the pan body 2, when the temperature of the electric heating film 3 is increased to a set first temperature value, the temperature control device 7 acts to disconnect the power supply from the heating coating 32 and stop heating, when the temperature of the electric heating film 3 begins to drop, and when the temperature of the electric heating film 3 is reduced to a set second temperature value, the temperature control device 7 acts again to connect the power supply to start heating, so that the temperature of the pan body 2 can be kept in a reasonable interval all the time, so that the food can be cooked and heated better. And, moreover, the method comprises the steps of. If the electrothermal film 3 has an abnormal condition of overhigh temperature in the working process and the temperature control device 7 can not normally power off the heating coating 32, the safety device 8 can act according to the set technical parameters to disconnect the external power supply of the whole electric chafing dish, thereby providing safety protection for the electric chafing dish and the surrounding environment thereof.

It can be understood that if the temperature control device 7 and the safety device 8 are relatively installed on the base 1, and the temperature control device 7 and the safety device 8 are both abutted against the electrothermal film 3 of the lower bottom 21 of the pot body 2, the temperature control device 7 and the electrothermal film 3 and the safety device 8 and the electrothermal film 3 are easily affected by deformation of the base 1 or assembly errors among the components, so that the problem of mutual separation occurs, and the effect of detecting the real-time temperature of the electrothermal film 3 is affected; if the lower bottom surface 21 of the pot body 2 is provided with the studs, the bosses or the screw holes for connecting the temperature control device 7 and the safety device 8, the temperature control device 7 and the safety device 8 can be directly fixed on the lower bottom surface 21 of the pot body 2, so that the temperature control device 7 and the safety device 8 can be directly contacted with the electrothermal film 3 to detect the temperature of the electrothermal film 3 in real time; however, the arrangement of the studs, the bosses and the screw holes can cause the problem of uneven part of the area of the lower bottom surface 21 of the pot body 2, which is not beneficial to spraying or printing of the electrothermal film 3.

Therefore, preferably, in order to solve the above-mentioned problem, as shown in fig. 4, in this embodiment, the electric chafing dish further includes a fixing frame 6, the fixing frame 6 is connected to the lower bottom 21 of the pot body 2, the connection point of the fixing frame 6 and the lower bottom 21 is located at the periphery of the lower bottom 21, both the temperature control device 7 and the safety device 8 are disposed on the fixing frame 6, and both the temperature control device 7 and the safety device 8 can be in direct contact with the electric heating film 3; so set up, can make temperature control device 7 and safety device 8 homoenergetic compress tightly and paste electrothermal film 3 to guarantee temperature control device 7 and safety device 8 to electrothermal film 3's real-time temperature detection's accuracy, and, because mount 6 and this tie point of lower bottom surface 21 are in the periphery of lower bottom surface 21, the main region of lower bottom surface 21 of pot body 2 does not have protruding or sunken, and this main region of lower bottom surface 21 can keep leveling, is favorable to electrothermal film 3's spraying or printing. Specifically, the temperature control device 7 and the safety device 8 may be, but not limited to, a temperature control switch or a temperature sensing cable or a temperature sensor, etc.

Preferably, in this embodiment, the fixing frame 6 may further be provided with a mica sheet, where the mica sheet is located between the electrothermal film 3 and the base 1, and the mica sheet may isolate the electrothermal film 3 and the base 1 to improve the overall use safety of the electric chafing dish; specifically, in this embodiment, the lower bottom 21 of the pot body 2 is rectangular, and the fixing frame 6 is connected to the lower bottom 21 along the width direction of the lower bottom 21, so that the occupied space of the fixing frame 6 is smaller, and the overall structure of the electric chafing dish can be more compact.

As shown in fig. 4, 6 and 7, specifically, in this embodiment, the periphery of the lower bottom 21 of the pan body 2 is provided with a plurality of positioning columns 22, the base 1 is provided with a plurality of positioning tables 11, the plurality of positioning columns 22 can be connected to the plurality of positioning tables 11 in a one-to-one correspondence manner to realize accurate and reliable assembly between the pan body 2 and the base 1, and, importantly, since the positioning columns 22 are disposed on the periphery of the lower bottom 21, the main area of the lower bottom 21 can still be kept flat, which is beneficial to spraying or printing of the electrothermal film 3.

Further, in this embodiment, the electric chafing dish further includes a plurality of heat insulation sleeves 12, the plurality of heat insulation sleeves 12 are sleeved on the plurality of positioning columns 22 in a one-to-one correspondence manner, each positioning column 22 is connected with the positioning table 11 through one heat insulation sleeve 12, and the heat insulation sleeves 12 are located between the positioning columns 22 and the positioning table 11, so as to play a role of heat insulation by using the heat insulation sleeves 12. Specifically, in this embodiment, be equipped with first step hole in the insulating sheath 12, be equipped with the second step hole in the locating table 11, the insulating sheath 12 inserts the second step hole of locating table 11, the first step hole of locating column 22 inserting of locating sheath 12, then available screw is by supreme locating table 11 and insulating sheath 12 and with locating column 22 spiro union of passing down, so set up, on the one hand, can make the whole occupation space of the fixed knot who connects that locating column 22, insulating sheath 12 and locating table 11 three constitute less, on the other hand, the fixed knot who connects that locating column 22, insulating sheath 12 and locating table 11 three constitute still has simple structure, convenient production, function implementation is easy and advantage with low costs.

As shown in fig. 8 and 9, further, in this embodiment, the base 1 includes a wire pressing cover 14, the bottom surface of the base 1 is further provided with a wire routing chamber 13, the wire pressing cover 14 is locked on the wire routing chamber 13 by a screw, a wire releasing seat 131 is disposed in the wire routing chamber 13, a U-shaped wire slot 132 penetrating in a first direction is formed on the wire releasing seat 131, a wire passing hole 15 opening in a second direction is formed between the wire pressing cover 14 and the chamber, and an included angle is formed between the first direction and the second direction; the line ball lid 14 can compress tightly the power cord on U type wire casing 132 and through wires hole 15, and because first direction and second direction are the contained angle, the power cord can appear bending between U type wire casing 132 and through wires hole 15, and the resistance of pulling the power cord is bigger like this, and the power cord is more fixed, and the power cord is difficult to be pulled out directly in the wiring cavity 13, and the security of power cord has improved. Specifically, in this embodiment, the threading hole 15 is disposed on the sidewall of the wire pressing cover 14, and indeed, in some other embodiments, the threading hole 15 may also be disposed on the sidewall of the wire routing chamber 13, or the threading hole 15 may also be disposed on the sidewall where the wire pressing cover 14 and the wire routing chamber 13 are connected to each other, which is selected according to practical requirements.

Preferably, in this embodiment, the included angle between the first direction and the second direction is 90 degrees, which is needless to say, in some other embodiments, the included angle between the first direction and the second direction may be, but is not limited to, 60 degrees, 75 degrees, 105 degrees, or the like, and may be selected according to practical requirements.

Preferably, a plurality of separating ribs 133 are further arranged in the wiring cavity 13, the power line and other internal leads can be arranged and combined in the wiring cavity 13, and the live line, the zero line and the ground line can be isolated by the separating ribs 133, so that the problems of arc discharge or contact short circuit are avoided, and the assembly of each line is simpler and the arrangement is more reasonable. Preferably, in the present embodiment, the separation rib 133 extends in the first direction. Indeed, in some other embodiments, the separating rib 133 may also extend along a direction that forms an angle with the first direction, which may be selected according to practical requirements.

In summary, the electric chafing dish disclosed by the utility model has at least the following beneficial technical effects:

1) The electrothermal film 3 can be uniformly distributed on the outer surface of the pot body 2, the electrothermal film 3 and the pot body 2 can be kept in close contact, both electrothermal efficiency and heat transfer efficiency are improved, and the heating of food materials in the pot body 2 is more balanced;

2) The inner insulating layer 31 and the outer insulating layer 34 can effectively protect the heating coating 32 and the conductive coating 33 and improve the insulating property of the heating coating 32 and the conductive coating 33 in the use process so as to prolong the service life;

3) The electrothermal film 3 is directly coated on the lower bottom surface 21 of the pot body 2, so that the adhesion and fixation between the electrothermal film 3 and the pot body 2 are firmer, and even if each coating of the electrothermal film 3 and a base material of the pot body 2 have inconsistent expansion coefficients, the electrothermal film 3 cannot fall off from the pot body 2 after being repeatedly heated;

4) The heat transfer between the inner insulating layer 31 and the heating coating 32 can be prevented from being influenced by the conductive coating 33, so that the heat generated by the heating coating 32 can be ensured to be directly transferred to the pot body 2 through the inner insulating layer 31, and the heat generated by the heating coating 32 can be more uniformly and fully transferred to the pot body 2;

5) The electric connection sheet 4 has elasticity, even if thermal expansion deformation occurs, under the action of elasticity, the electric connection sheet 4 can well keep fit and abut against the conductive coating 33, and the electric connection sheet 4 and the conductive coating 33 can always keep good contact;

6) Short-circuiting between the first electrode portion 331 and the second electrode portion 332 can be avoided, all loops of the heat-generating coating 32 between the first periphery and the second periphery can participate in electrifying and heating, and therefore the utilization rate and the heat-generating efficiency of the heat-generating coating 32 can be at a higher level;

7) The main area of the lower bottom surface 21 of the pan body 2 is free from bulges or depressions, and the main area of the lower bottom surface 21 is kept flat, which is beneficial to spraying or printing of the electrothermal film 3;

8) The resistance of pulling the power cord is larger, the power cord is more fixed, the power cord is not easy to be directly pulled out from the wiring cavity 13, and the safety of the power cord is improved.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (10)

1. Electric chafing dish, its characterized in that includes:

a base (1);

the pot body (2) is arranged in the base (1);

the electric heating film (3) is coated on the outer surface of the pot body (2), the electric heating film (3) comprises an inner insulating layer (31), a heating coating (32), a conductive coating (33) and an outer insulating layer (34) which are stacked in the thickness direction, the heating coating (32) and the conductive coating (33) are located between the inner insulating layer (31) and the outer insulating layer (34), and the inner insulating layer (31) is in direct contact with the outer surface of the pot body (2) so that the heating coating (32) and the conductive coating (33) are insulated from the pot body (2).

2. Electric chafing dish according to claim 1, characterized in that the outer surface of the pot body (2) comprises a lower bottom surface (21) opposite to the base (1), the electric heating film (3) being applied to the lower bottom surface (21), the inner insulating layer (31) being in direct contact with the lower bottom surface (21).

3. An electric chafing dish according to claim 1 or 2, characterized in that the inner insulating layer (31), the heat-generating coating (32), the electrically conductive coating (33) and the outer insulating layer (34) are laminated in order.

4. Electric chafing dish according to claim 2, characterized in that the electric chafing dish further comprises an electric connection piece (4) for connecting to a power source; the conductive coating (33) comprises a first electrode part (331) and a second electrode part (332), wherein the first electrode part (331) is provided with a first contact part (3311) exposed out of the outer insulating layer (34) in a first direction, and the second electrode part (332) is provided with a second contact part (3321) exposed out of the outer insulating layer (34) in the first direction, and the first direction is the length direction or the width direction of the outer insulating layer (34); the first contact portions (3311) and the second contact portions (3321) are connected to the two electric connection pieces (4) in one-to-one correspondence.

5. The electric chafing dish according to claim 4, characterized in that the electric connection pieces (4) have elasticity, and the two electric connection pieces (4) are configured to be abutted against the first contact point part (3311) and the second contact point part (3321) in a one-to-one correspondence under the action of own elasticity.

6. The electric chafing dish according to claim 4, characterized in that the heat generating coating (32) has opposite first and second peripheral edges, the body of the first electrode portion (331) being a first body portion (3312), the body of the second electrode portion (332) being a second body portion (3322), the first body portion (3312) extending along the first peripheral edge, the second body portion (3322) extending along the second peripheral edge.

7. Electric chafing dish according to claim 4, characterized in that the electric chafing dish further comprises an insulating support (5), the insulating support (5) being arranged at the periphery of the lower bottom surface (21), the electric connecting piece (4) being arranged at the insulating support (5).

8. Electric chafing dish according to claim 7, characterized in that the first contact part (3311) and the second contact part (3321) extend towards both electric connection pieces (4) in a one-to-one correspondence.

9. The electric chafing dish according to claim 8, characterized in that the first electrode portion (331) and the second electrode portion (332) are oppositely arranged and each have an L-shape, and the first contact portion (3311) and the second contact portion (3321) extend toward each other.

10. Electric chafing dish according to claim 2, characterized in that the electric chafing dish further comprises a fixing frame (6) and a temperature control device (7), the fixing frame (6) is connected to the lower bottom surface (21), the connection point of the fixing frame (6) and the lower bottom surface (21) is located at the periphery of the lower bottom surface (21), the temperature control device (7) is arranged on the fixing frame (6), and the temperature control device (7) is in contact with the electrothermal film (3).