CN112932281A

CN112932281A - Electric oven

Info

Publication number: CN112932281A
Application number: CN202110399348.2A
Authority: CN
Inventors: 郭进; 黄辉; 陈嘉林; 陈武忠; 邓雁青
Original assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2021-06-11

Abstract

The invention discloses an electric oven, comprising: the graphite heating device comprises a box body, a graphite heating device and a door body, wherein the box body comprises a top plate, a bottom plate, a rear plate, a left side plate and a right side plate, at least two of the top plate, the bottom plate, the rear plate, the left side plate and the right side plate are provided with reflecting parts, and the reflecting parts are mirror metal or heat reflecting coatings; the door body is connected to the box body and defines a cooking cavity with the box body; the graphite heating device is used for heating the cooking cavity. The inner wall of the cooking cavity of the electric oven adopts mirror surface metal or a heat reflection coating, the heating tube adopts a graphite heating device with high heating efficiency, the heating speed of the oven core of the electric oven is high, the heating speed is more than 3 times of that of the existing oven, the preheating-free function can be realized, and the electric oven is convenient and fast.

Description

Electric oven

Technical Field

The invention relates to the technical field of household appliances, in particular to an electric oven.

Background

The temperature in the cavity of the electric oven is slowly raised, the set temperature can be reached only by preheating for 8 to 10 minutes during baking, the consumed time is long, and the use requirement of a user cannot be met.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an electric oven which can improve the temperature rising speed of the electric oven.

An electric oven according to an embodiment of the present invention includes: the graphite heating device comprises a box body, a graphite heating device and a door body, wherein the box body comprises a top plate, a bottom plate, a rear plate, a left side plate and a right side plate, at least two of the top plate, the bottom plate, the rear plate, the left side plate and the right side plate are provided with reflecting parts, and the reflecting parts are mirror metal or heat reflecting coatings; the door body is connected to the box body and defines a cooking cavity with the box body; the graphite heating device is used for heating the cooking cavity.

The electric oven provided by the embodiment of the invention at least has the following beneficial effects: the inner wall of the cooking cavity of the electric oven adopts mirror surface metal or a heat reflection coating, the heating tube adopts a graphite heating device with high heating efficiency, the heating speed of the oven core of the electric oven is high, the heating speed is more than 3 times of that of the existing oven, the preheating-free function can be realized, and the electric oven is convenient and fast.

According to some embodiments of the invention, the door body includes a door frame portion and a reflective glass portion mounted to the door frame portion, the reflective glass portion being at least one of low emissivity coated glass, borosilicate glass, or silicon crystal glass.

According to some embodiments of the invention, the door frame portion is provided with a mounting location for mounting the reflective glass portion, the mounting location comprising a first limiting portion for abutting an axial side surface of the reflective glass portion and a second limiting portion for abutting a circumferential side surface of the reflective glass portion.

According to some embodiments of the invention, the reflective glass portion is adhered to the mounting location.

According to some embodiments of the invention, the door frame portion is provided with a snap for pressing the reflective glass portion to the mounting position.

According to some embodiments of the present invention, the door body includes a plurality of the reflective glass portions, and the plurality of the reflective glass portions are spaced apart in a direction perpendicular to the rear plate.

According to some embodiments of the present invention, the door body includes a handle, the reflective glass portion includes a first glass portion and a second glass portion, the second glass portion is located between the handle and the first glass portion, and a projection area of the second glass portion projected onto the rear panel is larger than a projection area of the first glass portion.

According to some embodiments of the invention, the bottom plate comprises a mounting plate and a supporting glass part, and a mounting cavity for accommodating the graphite heat generating device is formed between the mounting plate and the supporting glass part.

According to some embodiments of the invention, the mounting plate is provided with the reflecting portion.

According to some embodiments of the invention, the support glass portion is at least one of low emissivity coated glass, borosilicate glass, or silicon glass.

According to some embodiments of the invention, the electric oven comprises a fan assembly, the top plate is provided with an air suction opening and an air inlet, the air suction opening and the air inlet are both communicated with the cooking cavity, the fan assembly is arranged at the air suction opening, and the graphite heating device is arranged at the air inlet.

According to some embodiments of the invention, the box body comprises a mounting rack for mounting the graphite heat generating device, and a sheath is arranged between the graphite heat generating device and the mounting rack.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further described with reference to the following figures and examples, in which:

fig. 1 is a schematic structural view of an electric oven according to an embodiment of the present invention;

FIG. 2 is an exploded view of the electric oven shown in FIG. 1;

FIG. 3 is a cross-sectional view of the electric oven shown in FIG. 1;

FIG. 4 is an enlarged view at A shown in FIG. 3;

FIG. 5 is an enlarged view at B shown in FIG. 3;

FIG. 6 is an enlarged view at C shown in FIG. 3;

FIG. 7 is a schematic view of the mounting bracket and the graphite heat generating device shown in FIG. 2;

FIG. 8 is an enlarged view at D shown in FIG. 4;

fig. 9 is a schematic structural view of the first graphite heat generating tube shown in fig. 2.

Reference numerals:

101. a box body; 102. a door body; 103. a handle;

201. a cooking cavity; 202. a top plate; 203. a base plate; 204. a back plate; 205. a left side plate; 206. a right side plate; 207. a thermal insulation device; 208. a housing; 209. a rear cover plate; 210. a first graphene heat-generating tube; 211. a second graphene heat-generating tube; 212. a door frame portion; 213. a reflective glass section; 214. a mounting frame;

301. a hot air motor; 302. a hot fan blade; 303. a wind scooper; 304. a first frame body; 305. a second frame body; 306. mounting a plate; 307. a support glass portion; 308. a mounting cavity; 309. a protective grid;

401. a first limiting part; 402. a second limiting part; 403. a first glass portion; 404. a second glass portion; 405. a third glass portion; 406. buckling;

501. a first groove portion; 502. a second groove portion;

601. a first guard bar; 602. a second guard bar; 603. a first guard section; 604. a transition section; 605. a second guard section;

701. a sheath;

801. and (7) folding edges.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

The electric oven is a kitchen appliance for baking food by using heat radiation emitted by a heating tube. At present, a cavity of an electric oven is made of common galvanized plates or common stainless steel materials or sprayed with high-temperature oil, a heating tube is made of common metal heating tubes or quartz tubes, the heating efficiency of the common metal heating tubes or the quartz tubes is low, the heat dissipation of the cavity of the electric oven is fast, the heat preservation capability is poor, the temperature in the cavity of the electric oven is slowly increased, the electric oven generally needs to be preheated for 8 to 10 minutes to reach a set temperature during baking, the consumed time is long, and the use requirement of a user cannot be met.

Referring to fig. 1 to 9, an electric oven according to an embodiment of the present invention will be described with respect to solving the above-mentioned problems.

Referring to fig. 1 to 3, the electric oven according to the embodiment of the present invention includes a cabinet 101, a graphite heating device, and a door 102, wherein the door 102 is connected to the cabinet 101, and the door 102 and the cabinet 101 together define a closed cooking cavity 201, food is placed in the cooking cavity 201 for cooking, and the graphite heating device is used for heating the cooking cavity 201 to bake the food in the cooking cavity 201.

Under the condition that electrodes at two ends of the graphite heating device are electrified, phonons, ions and electrons are generated in the resistor by carbon molecules in the graphite heating device, heat energy is generated by mutual friction and collision (also called Brownian motion) between generated carbon molecular groups, and the heat energy is uniformly radiated in a plane mode by far infrared rays with the controlled wavelength of 5-14 microns. The total conversion rate of the effective electric heating energy reaches more than 99 percent, and the stable heating performance is ensured. Therefore, the heating of the graphite heating device is higher than that of a common metal heating tube or a quartz tube, and the graphite heating device is adopted to replace the common metal heating tube or the quartz tube, so that the heating efficiency can be effectively improved, and the time required for reaching the preset temperature is shortened.

The graphite heat generating device may be a graphite heat generating tube, a graphite heat generating film, or the like.

In addition, the cabinet 101 includes a top plate 202, a bottom plate 203, a rear plate 204, a left side plate 205, and a right side plate 206, and at least two of the top plate 202, the bottom plate 203, the rear plate 204, the left side plate 205, and the right side plate 206 are provided with reflection portions which are specular stainless steel or specular aluminum or a high infrared reflection coating. I.e., at least two of the top plate 202, the bottom plate 203, the back plate 204, the left side plate 205, and the right side plate 206, is made of specular stainless steel or specular aluminum, or other base material, and a high infrared reflection coating is sprayed on the base material.

For example, the top plate 202 is made of mirror stainless steel, and the bottom plate 203 is also made of mirror stainless steel. The top plate 202, the bottom plate 203, the rear plate 204, the left side plate 205, and the right side plate 206 may be made of mirror aluminum. Alternatively, the rear plate 204 is made of mirror stainless steel, the left side plate 205 is made of mirror aluminum, the right side plate 206 is made of common aluminum, and a high infrared reflection coating is sprayed on the base material. Of course, the substrate to which the high infrared reflection coating is applied may be ordinary stainless steel or other materials.

The mirror aluminum refers to an aluminum plate processed by various methods such as rolling and polishing to make the surface of the plate show a mirror effect. The mirror aluminum has wide application. The solar energy heat collecting and reflecting plate is widely applied to the fields of reflecting plates and lamp decorations of lighting lamps, solar energy heat collecting and reflecting materials, indoor architectural decorations, outer wall decorations, panels of household appliances, shells of electronic products, furniture and kitchens, internal and external decorations of automobiles, labels, marks, cases, jewel boxes and the like.

Similarly, the mirror surface stainless steel refers to a stainless steel plate processed by various methods such as rolling, polishing and the like to make the surface of the plate show a mirror surface effect. "mirror surface" refers to the surface state of stainless steel.

In addition, excessive surface temperatures of buildings, industrial equipment, instruments and equipment, etc. caused by heat radiation cause problems and inconveniences in industrial production and daily life of people. In order to reduce inconvenience and harm brought to production and life of people by heat radiation, people design various methods for protecting heat radiation, wherein an infrared heat reflection coating is a commonly used method, and the infrared heat reflection coating is a coating which is coated on the surface of an object and has high reflectance to an infrared band (0.76-1000 mu m) in radiation, so that the temperature rise of the surface of the coating is inhibited, the internal temperature of a covering is reduced at the same time, and the energy-saving and heat-insulating effects are achieved. The highest temperature in the common engineering is below 2000K, and the proportion of visible light energy is less than 1.5%, so the heat radiation in the engineering is basically in the infrared heat radiation range, and the infrared heat radiation accounts for 53% of the total solar radiation energy according to the radiation spectrum distribution of the sun. Therefore, infrared radiation is suppressed, and most of the energy of the radiation can be isolated. The infrared heat reflection coating can be classified into a sprayed infrared heat reflection coating, a sol-gcl infrared heat reflection coating, according to the coating method. The infrared heat reflection coating sprayed on the surface of the substrate also comprises the infrared heat reflection coating which is directly brushed by a brush and is still used at present. And the high infrared reflection coating refers to a part with reflectivity of more than 0.9 for an infrared band.

Through setting up the reflection part, reduce the heat and scatter and disappear, can remain the heat in culinary art chamber 201, improve heating efficiency, further shorten the heating time.

It will be appreciated that the reflective portion may be a coating of other heat reflective material than a high infrared reflective coating.

According to the electric oven disclosed by the embodiment of the invention, the heating tube adopts the graphite heating device with high heating efficiency, the inner wall of the cooking cavity 201 adopts high-reflectivity mirror stainless steel or mirror aluminum or is sprayed with a high infrared reflection coating, the heating speed of the oven core of the electric oven is high, the heating speed is more than 3 times of that of the existing oven, the baking preheating-free function can be realized, and the electric oven is convenient and quick.

Referring to fig. 2, it can be understood that the cabinet 101 further includes a heat insulation device 207, and the heat insulation device 207 is disposed outside the cooking chamber 201. By providing the heat insulating device 207, heat dissipation to the outside can be reduced, and temperature rise of the outer surface of the box 101 can be reduced.

Referring to fig. 2, it can be understood that the cabinet 101 includes two heat insulation devices 207, wherein one heat insulation device 207 is disposed on a side of the left side plate 205 away from the cooking cavity 201, and the other heat insulation device 207 is disposed on a side of the right side plate 206 away from the cooking cavity 201. I.e. two thermal insulation devices 207 are located outside the left side panel 205 and the right side panel 206, respectively. The two heat insulation devices 207 insulate the two sides of the cooking cavity 201, so that the heat loss inside the cooking cavity 201 for baking food is less, the cooking cavity 201 for baking food is ensured to be always in a high-temperature state, and the baking speed and the baking effect of the electric oven are improved.

It should be noted that the number of the heat insulation devices 207 may also be more than three, and may be arranged outside the top plate 202, the bottom plate 203 and the back plate 204 according to actual requirements, in addition to being arranged outside the left side plate 205 and the right side plate 206.

It can be understood that the heat insulation device 207 may include a heat insulation board and heat insulation cotton, and in order to ensure that the electric oven operates normally and cannot scald a user during ultra-high temperature baking, the heat insulation device 207 according to the embodiment of the present invention additionally adds a layer of heat insulation board with a large size on the basis of heat insulation protection by the heat insulation cotton, so as to further block heat flow in the cooking cavity 201 from being transmitted to the outer surface of the electric oven, so that the temperature of the outer surface of the electric oven is reduced.

It should be noted that the thermal insulation device 207 may also include only thermal insulation boards or thermal insulation cotton, or other thermal insulation members.

Referring to fig. 2, it can be understood that the cabinet 101 includes an outer cover 208 and a back cover plate 209, the outer cover 208 is covered on one side of the top plate 202, the left side plate 205 and the right side plate 206 away from the cooking chamber 201, the back cover plate 209 is disposed on one side of the back plate 204 away from the cooking chamber 201, and a good protection effect is achieved by disposing the outer cover 208 and the back cover plate 209 on the outer sides of the top plate 202, the bottom plate 203, the back plate 204, the left side plate 205 and the right side plate 206.

It will be appreciated that there is a gap between the backplate 209 and the backplate 204 which allows air to pass through, thereby providing heat dissipation and insulation.

It is understood that the electric oven according to the embodiment of the present invention may be configured such that an insulation board and insulation cotton are disposed on a side of the left side plate 205 away from the cooking cavity 201, an insulation board and insulation cotton are disposed on a side of the right side plate 206 away from the cooking cavity 201, an insulation board and insulation cotton are disposed on a side of the top plate 202 away from the cooking cavity 201, insulation cotton is disposed on a side of the bottom plate 203 away from the cooking cavity 201, and the rear cover plate 209 is disposed on a side of the rear plate 204 away from the cooking cavity 201, and such that a gap is present between the rear cover plate 209 and the rear plate 204, and the gap is capable of allowing air to flow. Thereby realizing a multi-directional heat insulation effect, blocking heat flow in the cooking cavity 201 from being transferred to the outer surface of the electric oven, and reducing the temperature of the outer surface of the electric oven.

Referring to fig. 2 and 3, it can be understood that the electric oven of the embodiment of the present invention further includes a fan assembly, the graphite heating device includes a first graphene heating tube 210 and a second graphene heating tube 211, the top plate 202 is provided with an air suction opening (not shown) and an air inlet (not shown) which are communicated with the cooking cavity 201, the first graphene heating tube 210 is installed above the cooking cavity 201, and the first graphene heating tube 210 is opposite to the air inlet. The second ink heating tube 211 is installed below the cooking chamber 201. It will be appreciated that the fan assembly is used to draw the air in the cooking chamber 201 out of the suction opening for heat exchange and then re-deliver the heat exchanged air from the inlet opening into the cooking chamber 201 to complete the air flow cycle.

Referring to fig. 3, it can be understood that the fan assembly includes a hot air motor 301, a hot air fan blade 302 and a wind scooper 303, the hot air fan blade 302 is located at the air exhaust opening, and the hot air fan blade 302 is used for exhausting the air in the cooking cavity 201. The wind scooper 303 is covered on the suction opening and the air inlet, and the hot air fan blade 302 is located in a flow guiding cavity (not shown in the figure) defined between the wind scooper 303 and the top plate 202.

Referring to fig. 2 and 3, it can be understood that the number of the first ink heat generation tubes 210 installed above the cooking chamber 201 is 4, and the number of the second ink heat generation tubes 211 installed below the cooking chamber 201 is 2. When the barbecue function was opened to the electric oven, first ink alkene heating tube 210 and second ink alkene heating tube 211 generated heat simultaneously, and the fan subassembly is out of work, and the heat radiation that is sent by first ink alkene heating tube 210 and second ink alkene heating tube 211 toasts food. When the air of electric oven was opened and is fried the function, 4 first ink alkene heating tube 210 generate heat earlier, preheat culinary art chamber 201, when the temperature in culinary art chamber 201 reachd preset temperature value, 2 first ink alkene heating tube 210 stop heating, 2 second ink alkene heating tube 211 begin to generate heat, realize the even heating, fan assembly begins work simultaneously, by going into the wind gap to the air supply in culinary art chamber 201, and breathe in by the suction opening position, make and form strong air current circulation in the culinary art chamber 201, through strong hot air current and food contact, make food degrease fast, thereby realize the effect of frying.

Referring to fig. 2 to 4, it can be understood that the door body 102 includes a door frame portion 212 and a reflective glass portion 213, and the reflective glass portion 213 is mounted to the door frame portion 212. The reflective glass part 213 may be a low emissivity coated glass or a borosilicate glass or a silicon glass, and the reflective glass part 213 may be a combination of three low emissivity coated glass, borosilicate glass or silicon glass, or a combination of two low emissivity coated glass, borosilicate glass or silicon glass. Through setting up reflecting glass portion 213, can reduce the heat and scatter and disappear, can keep the heat in culinary art chamber 201, improve heating efficiency, further shorten the heating time.

Among them, the LOW-emissivity coated glass (also called LOW-E glass) is a film product formed by coating a plurality of layers of metals or other compounds on the surface of the glass. The low-radiation coated glass has high visible light transmittance and high infrared (especially middle and far infrared) reflectance, so that the low-radiation coated glass has good heat insulation performance.

The borosilicate glass is processed by advanced production process by utilizing the conductive characteristic of the glass in a high-temperature state and heating the inside of the glass to melt the glass; borosilicate glass is colorless transparent glass, has very low thermal expansion coefficient, is high temperature resistant, and resists the sharp change of temperature difference of 200 ℃. The transmission wavelength is between 300nm and 2500nm, the transmissivity is ≧ 90%, and the thermal expansion coefficient is 3.3. Can resist acid and alkali, resist high temperature of about 400 ℃, and can resist temperature of about 550 ℃ if being specially treated. The borosilicate glass belongs to one of the best heat-resistant instrument glass, is widely used for various heat-resistant glass instruments, such as chemical anti-corrosion equipment and pipe fittings, glass instruments for laboratories, and is also excellent instrument glass for lamp industry.

Referring to fig. 4, it can be understood that the door frame portion 212 is provided with a mounting position for mounting the reflective glass portion 213, wherein the mounting position includes a first limiting portion 401 and a second limiting portion 402, the first limiting portion 401 and the second limiting portion 402 are perpendicular to each other, the first limiting portion 401 is used for abutting against an axial side surface of the reflective glass portion 213, and the second limiting portion 402 is used for abutting against a circumferential side surface of the reflective glass portion 213. Through setting up first spacing portion 401 and second spacing portion 402, realize spacing to the axial of reflection glass portion 213 and circumference, make things convenient for the location installation of reflection glass portion 213, improve reflection glass portion 213's stability.

Referring to fig. 4, it can be understood that the door body 102 includes three reflective glass portions 213, a first glass portion 403, a second glass portion 404, and a third glass portion 405. Referring to fig. 1 to 3, it can be understood that the door body 102 further includes a handle 103. The first glass portion 403, the second glass portion 404, and the third glass portion 405 are sequentially disposed in a rear-to-front direction, that is, the first glass portion 403, the second glass portion 404, and the third glass portion 405 are sequentially disposed in a direction from the rear plate 204 to the handle 103, and the first glass portion 403, the second glass portion 404, and the third glass portion 405 are disposed at intervals in a direction perpendicular to the rear plate 204. Through setting up a plurality of reflection glass portions 213, can improve reflection efficiency, reduce the heat and scatter and disappear, can remain the heat in culinary art chamber 201, improve heating efficiency, further shorten the heat time.

Referring to fig. 4, it can be understood that the first glass portion 403 is adhered to the installation location and fixed by gluing, so that the appearance of the first glass portion can be prevented from being affected by structures such as the buckle 406, and the aesthetic feeling can be improved. The second glass portion 404 and the third glass portion 405 are fixed by means of the buckle 406, that is, the buckle 406 is arranged on the door frame portion 212, and the buckle 406 presses the second glass portion 404 and the third glass portion 405 to the mounting position, so that the second glass portion 404 and the third glass portion 405 are kept stable. Through the mode of buckle 406, can realize quick installation fixedly. Of course, the second glass portion 404 and the third glass portion 405 may be fixed by a screw connection or the like.

Referring to fig. 3 and 4, it can be understood that the area of the longitudinal cross section of the second glass portion 404 is larger than that of the first glass portion 403, that is, the area of the cross section of the second glass portion 404 in the longitudinal direction is larger than that of the cross section of the first glass portion 403 in the longitudinal direction, and it can also be understood that the area of the projection of the second glass portion 404 on the rear plate 204 in the direction perpendicular to the rear plate 204 is larger than that of the projection of the first glass portion 403 on the rear plate 204. Through above design for along the direction of keeping away from culinary art chamber 201, the reflection area increase of reflection glass portion 213 can protect the infrared ray of bypassing first glass portion 403, and further improvement reflection efficiency reduces the heat and scatters and disappears, can remain the heat in culinary art chamber 201, improves heating efficiency, further shortens heating time.

Referring to fig. 3 and 4, it can be understood that the vertical sectional area of the third glass portion 405 is equal to that of the first glass portion 403, that is, the vertical sectional area of the third glass portion 405 is smaller than that of the second glass portion 404, and the vertical sectional area of the second glass portion 404 located between the first glass portion 403 and the third glass portion 405 is the largest. The longitudinal cross-sectional area of the third glass portion 405 is smaller than that of the second glass portion 404, so that the edge position of the second glass portion 404 can be shielded by using the mounting position of the door frame portion 212 on which the third glass portion 405 is mounted, and the edge position of the second glass portion 404 is prevented from being exposed in the window range, thereby affecting the appearance effect. Meanwhile, the longitudinal cross-sectional area of the third glass portion 405 is equal to the longitudinal cross-sectional area of the first glass portion 403, and the edge position of the first glass portion 403 can be shielded by using the installation position of the third glass portion 405 on the door frame portion 212, so that the edge position of the second glass portion 404 is prevented from being exposed in the window range, and the appearance effect is prevented from being influenced. Furthermore, the edge position of the third glass portion 405 may be shielded by the mounting position of the door frame portion 212 where the first glass portion 403 is mounted, so as to prevent the clip 406 on the mounting position where the first glass portion 403 is mounted from being exposed from the other side in the window range, thereby affecting the appearance effect.

Referring to fig. 3 and 4, it can be understood that, in order to facilitate installation of the first glass portion 403, the second glass portion 404 and the third glass portion 405, the door frame portion 212 includes a first frame body 304 and a second frame body 305, the first frame body 304 and the second frame body 305 are independent from each other, the third glass portion 405 and the second glass portion 404 are sequentially installed on the first frame body 304, the first glass portion 403 is installed on the second frame body 305, and then the first frame body 304 and the second frame body 305 are connected with each other, so that rapid installation of the door body 102 is achieved, and the problem that the middle second glass portion 404 is large in area and difficult to assemble is solved.

It should be noted that the door body 102 in the above embodiments includes the first glass portion 403, the second glass portion 404 and the third glass portion 405, which are merely exemplary and should not be construed as a specific limitation to the present embodiment. For example, the door 102 may include only one reflecting glass portion 213 and two reflecting glass portions 213, and the door 102 may include four or more reflecting glass portions 213. Also, the plurality of reflective glass portions 213 may have the same longitudinal cross-sectional area or other regular arrangement.

Referring to fig. 3 and 5, it can be understood that the base plate 203 includes a mounting plate 306 and a support glass portion 307, a mounting cavity 308 is formed between the mounting plate 306 and the support glass portion 307, and the second ink heating tube 211 is accommodated in the mounting cavity 308. By providing the support glass portion 307, objects such as chips falling thereon can be cleaned more conveniently.

It is to be understood that the support glass portion 307 may employ at least one of low-emissivity coated glass, borosilicate glass, or silicon glass.

Through adopting low-emissivity coated glass, borosilicate glass or silicon glass in bottom plate 203, the thermal-insulated effect of reinforcing bottom plate 203 can effectively reduce the heat and scatter and disappear, can remain the heat in culinary art chamber 201, improves heating efficiency, further shortens the heat time.

It is understood that the mounting plate 306 may be provided with a reflective portion, that is, the mounting plate 306 is made of mirror stainless steel or mirror aluminum, or other base material, and a high infrared reflective coating is sprayed on the base material. By providing the reflection portion on the mounting plate 306, the heat generated by the second ink heating tube 211 can be transferred to the cooking cavity 201 as much as possible, thereby improving the heating efficiency and further shortening the heating time.

Referring to fig. 5, it can be understood that the mounting plate 306 is provided with a first groove portion 501 and a second groove portion 502, the first groove portion 501 and the second groove portion 502 are arranged in a stepped manner, the first groove portion 501 is located above the second groove portion 502, the support glass portion 307 is mounted in the first groove portion 501, the mounting cavity 308 is defined between the support glass portion 307 and the second groove portion 502, and the second graphene heat-generating tube 211 is accommodated in the mounting cavity 308. By the design, the second ink alkene heating tube 211 and the support glass part 307 can be conveniently installed, the assembly process is simplified, and the assembly efficiency is improved.

Referring to fig. 2 and 6, it can be understood that the box 101 includes a protection grid 309, the protection grid 309 includes a plurality of first protection bars 601 and a plurality of second protection bars 602, the first protection bars 601 and the second protection bars 602 are arranged in a crossed manner to form a grid-like structure, the first protection bars 601 are arranged on one side of the second protection bars 602 close to the first ink heating tube 210, the second protection bars 602 include a first protection section 603, a second protection section 605 and a transition section 604, the first protection section 603 is arranged in an up-down direction, the second protection section 605 is arranged in a front-back direction, one section of the transition section 604 is connected with the first protection section 603, and the other end is connected with the second protection section 605. By providing the protective grill 309, food can be prevented from contacting the first graphene heat generating tube 210.

Referring to fig. 2 and fig. 7 to 9, it can be understood that the box 101 includes a mounting frame 214 for mounting the graphite heat generating device, and a sheath 701 is disposed between the graphite heat generating device and the mounting frame 214. Specifically, the graphite heating device may be a graphite heating tube, and a sheath 701 (shown in fig. 9) is sleeved at both ends of the graphite heating tube, and a mounting through hole (not shown in the figure) is formed in the mounting bracket 214, the graphite heating tube passes through the mounting through hole, the sheath 701 is also located in the mounting through hole, and abuts against the mounting bracket 214, so as to separate the graphite heating tube from the mounting bracket 214, and avoid direct contact between the graphite heating tube and the mounting bracket 214. Because graphite heating tube is different from ordinary metal heating tube or quartz capsule, graphite heating tube receives the vibration and rolls over the section relatively more the holding, so establish sheath 701 through the cover on graphite heating tube, can produce the effect of buffering, effectively protect graphite heating tube.

It will be appreciated that the sheath 701 may also be mounted on the mounting block 214, with the graphite heat generating tube passing through the sheath 701 for indirect mounting on the mounting block 214.

Referring to fig. 8, the mounting bracket 214 is further provided with a folded edge 801, the folded edge 801 is located at the edge of the mounting through hole, and the contact area between the mounting bracket 214 and the sheath 701 is increased through the folded edge 801, so that the graphite heating tube is supported more comprehensively, stress concentration is reduced, and reliability of the graphite heating tube is ensured.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. An electric oven, characterized in that includes:

the box body comprises a top plate, a bottom plate, a rear plate, a left side plate and a right side plate, wherein at least two of the top plate, the bottom plate, the rear plate, the left side plate and the right side plate are provided with reflecting parts, and the reflecting parts are mirror metal or heat reflecting coatings;

the door body is connected to the box body and defines a cooking cavity with the box body;

and the graphite heating device is used for heating the cooking cavity.

2. The electric oven of claim 1, wherein the door body comprises a door frame portion and a reflective glass portion mounted to the door frame portion, the reflective glass portion being at least one of low emissivity coated glass, borosilicate glass, or silicon glass.

3. The electric oven according to claim 2, wherein the door frame portion is provided with a mounting position for mounting the reflective glass portion, the mounting position comprising a first limit portion for abutting against an axial side surface of the reflective glass portion and a second limit portion for abutting against a circumferential side surface of the reflective glass portion.

4. The electric oven of claim 3, wherein the reflective glass portion is adhered to the mounting location.

5. The electric oven of claim 3, wherein the door frame portion is provided with a latch for pressing the reflective glass portion against the mounting location.

6. The electric oven according to claim 2, wherein the door body comprises a plurality of the reflective glass portions, and the plurality of the reflective glass portions are spaced apart in a direction perpendicular to the rear plate.

7. The electric oven according to claim 2, wherein the door comprises a handle, the reflective glass portion comprises a first glass portion and a second glass portion, the second glass portion is located between the handle and the first glass portion, and a projection area of the second glass portion projected on the rear plate is larger than a projection area of the first glass portion.

8. The electric oven of claim 1, wherein the bottom plate comprises a mounting plate and a supporting glass portion, and a mounting cavity for accommodating the graphite heat generating device is formed between the mounting plate and the supporting glass portion.

9. The electric oven of claim 8, wherein the mounting plate is provided with the reflective portion.

10. The electric oven of claim 8, wherein the support glass portion is at least one of low emissivity coated glass, borosilicate glass, or silicon glass.

11. The electric oven of claim 1, wherein the electric oven comprises a fan assembly, the top plate is provided with an air suction opening and an air inlet opening, the air suction opening and the air inlet opening are both communicated with the cooking cavity, the fan assembly is arranged at the air suction opening, and the graphite heating device is arranged at the air inlet opening.

12. The electric oven of claim 1, wherein the housing comprises a mounting bracket for mounting the graphite heat generating device, and a sheath is disposed between the graphite heat generating device and the mounting bracket.

13. The electric oven of claim 1 wherein the heat reflective coating comprises a high infrared reflective coating.