Cooking equipment

Abstract

The utility model discloses a cooking device which comprises an inner container, a heating device, a heating device, a heating device and a heating device, and the inner container is provided with a cooking cavity; the carbonaceous heating element is suitable for outputting heat radiation towards the interior of the cooking cavity; the first reflecting part is arranged on the inner wall of the cooking cavity, the first reflecting part is used for reflecting heat radiation emitted to the inner wall of the cooking cavity, and the first reflecting part is constructed to be at least used for reflecting infrared light with the wavelength of 2-9 microns. According to the cooking equipment, heat radiation of the carbonaceous heating piece can be reflected back to the interior of the cavity through the first reflecting piece, heat is prevented from being dissipated and lost outwards, the heat preservation and insulation effect of the inner container is remarkably improved, the energy utilization rate is remarkably improved, and the energy efficiency of the cooking equipment is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to kitchen equipment field especially is concerned with a cooking equipment. BACKGROUND

[0002] The oven is a kind of equipment for baking food or drying product in seal. In the related art, the oven includes inner container and heating element, and the oven works by heating element to bake food in inner container.

[0003] The utilization rate of the heat of heating element in the oven in the related art is low, resulting in large energy consumption and low energy efficiency of the oven. SUMMARY

[0004] The utility model at least solves one of the technical problems in the prior art. To this end, the utility model provides a cooking equipment, the heat radiation of carbon heating element can be reflected back to the cavity by the first reflecting element, to prevent heat dissipation loss outward, significantly improve the heat preservation and insulation effect of inner container, significantly improve energy utilization, and greatly improve the energy efficiency of cooking equipment.

[0005] According to the cooking equipment of the utility model embodiment, the inner container is provided with a cooking cavity, the carbon heating element is suitable for outputting heat radiation towards the cooking cavity, the first reflecting element is arranged on the inner wall of the cooking cavity, the first reflecting element is used for reflecting heat radiation towards the inner wall of the cooking cavity, and the first reflecting element is configured to at least reflect infrared light with a wavelength of 2-9 μm.

[0006] According to the cooking equipment of the utility model embodiment, the first reflecting element is arranged on the inner wall of the cooking cavity, the heat radiation of carbon heating element can be reflected back to the cavity by the first reflecting element, to prevent heat dissipation loss outward, significantly improve the heat preservation and insulation effect of inner container, significantly improve energy utilization, greatly improve the energy efficiency of cooking equipment, play the role of energy saving, can also play the role of accelerating cooking speed, in addition, the temperature of the outer wall of the inner container and the temperature of other structural members outside the inner container are reduced, and the safety of the cooking equipment is effectively improved. And the first reflecting element in the utility model embodiment has high reflectivity to infrared light with a wavelength of 2-9 μm, further improves the utilization rate of heat energy generated by carbon heating element, and reduces energy loss.

[0007] In some embodiments, the first reflecting element is a first reflecting coating arranged on the inner wall of the cooking cavity.

[0008] In some embodiments, the thickness of the first reflecting coating is B1, and the cooking equipment satisfies 20 μm≤B1≤30 μm.

[0009] In some embodiments, the cooking device further comprises a door body for opening or closing the holding opening of the cooking cavity, the door body is provided with the first reflecting member towards the rear surface of the cooking cavity and all the inner walls of the cooking cavity.

[0010] In some embodiments, the carbon heating element comprises: a first light-transmitting tube; a carbon heating element arranged in the first light-transmitting tube and adapted to emit the heat radiation; and a second reflecting member arranged outside the carbon heating element on the first light-transmitting tube, the first light-transmitting tube is provided with a light-transmitting region, and the second reflecting member is configured to reflect infrared light at least towards the light-transmitting region.

[0011] In some embodiments, the second reflecting member is configured to reflect infrared light with a wavelength of 2-9 μm.

[0012] In some embodiments, the intensity of the first reflecting member is greater than that of the second reflecting member.

[0013] In some embodiments, the second reflecting member is a second reflecting coating arranged on the light-transmitting tube.

[0014] In some embodiments, the thickness of the second reflecting member is B2, and B2 satisfies: 100 μm≤B2≤150 μm.

[0015] In some embodiments, in a longitudinal section of the light-transmitting tube, two ends of the second reflecting member are respectively point A and point B, the center of the second reflecting member is point O, and the central angle ∠AOB of the second reflecting member satisfies: 190°≤∠AOB≤230°.

[0016] In some embodiments, the carbon heating element is a graphene heating element.

[0017] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

[0019] Figure 1 is a schematic view of a cooking device according to an embodiment of the present application Figure 1 ;

[0020] Figure 2 is a schematic view of a cooking device according to an embodiment of the present application Figure 2 ;

[0021] Figure 3 is a partial sectional view of the inner container;

[0022] Figure 4 is a schematic view of the inner container cooperating with the carbon heating element;

[0023] Figure 5 is a spectral radiation distribution diagram of graphene;

[0024] Figure 6 is a schematic view of the carbon heating element;

[0025] Figure 7 is a sectional view of the carbon heating element;

[0026] Figure 8 is a distribution diagram of infrared spectral reflectance of the second reflective coating;

[0027] Figure 9 is an energy efficiency comparison diagram of the cooking equipment according to an embodiment of the present application and related art;

[0028] Figure 10 is a temperature comparison diagram of the outer wall surface of the inner container according to an embodiment of the present application and related art.

[0029] Reference signs: 100, cooking equipment; 1, inner container; 11, cooking cavity; 2, carbon heating element; 21, first light-transmitting tube; 211, light-transmitting area; 22, carbon heating element; 23, second reflective element; 4, first reflective element; 5, door body. DETAILED DESCRIPTION

[0030] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are only used to explain the present application and cannot be understood as a limitation of the present application.

[0031] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0032] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] Reference is made below Figures 1-10 The cooking equipment 100 according to the embodiments of the utility model is described.

[0034] Reference is made to Figure 1 , Figure 2 and Figure 3 The cooking equipment 100 according to the embodiments of the utility model comprises an inner container 1, a carbon heating element 2 and a first reflecting element 4, the inner container 1 is provided with a cooking cavity 11, the carbon heating element 2 is adapted to output heat radiation towards the cooking cavity 11, the first reflecting element 4 is arranged on the inner wall of the cooking cavity 11, the first reflecting element 4 is used for reflecting the heat radiation towards the inner wall of the cooking cavity 11, and the first reflecting element 4 is configured to at least reflect infrared light with a wavelength of 2-9 μm.

[0035] It needs to be explained that the carbon heating element 2 can comprise natural graphite, artificial graphite and / or graphene.

[0036] When the cooking device 100 is in operation, the carbon heating element 22 converts electric energy into heat radiation and directs the heat radiation towards the cooking cavity 11 to heat the object to be heated placed in the cooking cavity 11. However, the heat radiation generated by the carbon heating element 22 will not only be directed to the object to be heated, but also a large amount of heat radiation will be directed to the inner wall of the cooking cavity 11. In the embodiment of the present application, the first reflecting member 4 is arranged on the inner wall of the cooking cavity 11, so that the heat radiation directed to the inner wall of the cooking cavity 11 can be reflected to the object to be heated.

[0037] It should be understood that part of the heat radiation can be directly directed to the object to be heated after being reflected by the first reflecting member 4, and part of the heat radiation can be directed to other parts of the inner wall of the cooking cavity 11 after being reflected by the first reflecting member 4, and the heat radiation can be directed to the object to be heated after being reflected by the first reflecting member 4 for multiple times. Through the above technical solution, most of the heat radiation generated by the carbon heating element 2 can act on the object to be heated, which effectively improves the utilization rate of the heat radiation generated by the carbon heating element 2, reduces the energy loss, and improves the energy efficiency of the cooking device 100.

[0038] In the related art, the inner liner 1 of the oven absorbs a large amount of heat of the heat radiation, and continuously transfers the heat to the outside of the cooking cavity 11, so that a large amount of heat generated by the heating element is not effectively applied to the object to be heated, resulting in high energy consumption and low energy efficiency of the oven.

[0039] In the embodiment of the present application, the first reflecting member 4 is arranged on the inner wall of the cooking cavity 11, which can reflect the heat radiation of the carbon heating element 2 back to the inside of the cavity, prevent the heat from dissipating outwardly and losing, significantly improve the heat preservation and insulation effect of the inner liner 1, obviously improve the energy utilization rate, greatly improve the energy efficiency of the cooking device 100, play a role in energy saving, and at the same time, can play a role in accelerating the cooking speed. In addition, the temperature of the outer wall of the inner liner 1 and the temperature of other structural members outside the inner liner 1 are reduced, and the safety of the cooking device 100 is effectively improved.

[0040] In the embodiment of the present application, the first reflecting member 4 is configured to at least reflect infrared light with a wavelength of 2-9 μm.

[0041] Different materials have different reflection performance, and the reflection effect of different materials under different light spectrum mainly depends on the composition, structure of the material and the wavelength of the radiation. In order to improve the reflection ability of the first reflecting member 4 to the heat radiation generated by the carbon heating element 2, the heat radiation generated by the carbon heating element 2 needs to be analyzed.

[0042] Since the carbon heating element 2 can include natural graphite, artificial graphite and / or graphene, the carbon heating element 2 can generate thermal radiation in a wavelength of 1-20 μm radiation band. Preferably, the carbon heating element 2 includes graphene. Graphene has excellent properties of fast heating, high heating temperature and high strength, effectively improving the heating effect of the carbon heating element 2.

[0043] With reference to Figure 5 According to the spectral radiation distribution of graphene, the main radiation band of graphene when heating is 2-9 μm, and therefore in the embodiment of the utility model, the first reflecting element 4 is configured to at least reflect infrared light with a wavelength of 2-9 μm, so that the thermal radiation generated by graphene can all be reflected by the first reflecting element 4, further improving the reflection effect of the first reflecting element 4.

[0044] In the embodiment of the utility model, the reflection capacity of the first reflecting element 4 is adapted to the thermal radiation generated by graphene, improving the reflection efficiency of the first reflecting element 4 on the thermal radiation of the carbon heating element 2, effectively improving the utilization rate of the thermal energy generated by the carbon heating element 2 and reducing energy loss.

[0045] In other embodiments, the first reflecting element 4 can not only be used to reflect infrared light with a wavelength of 2-9 μm, but also can reflect radiation with other wavelengths. However, the reflection effect of the first reflecting element 4 on infrared light with a wavelength of 2-9 μm is better than that on radiation with other wavelengths.

[0046] According to the cooking equipment 100 of the embodiment of the utility model, the first reflecting element 4 is arranged on the inner wall of the cooking cavity 11, the first reflecting element 4 can reflect the thermal radiation of the carbon heating element 2 back to the inside of the cavity, preventing heat loss by dissipation to the outside, significantly improving the heat preservation and insulation effect of the inner container 1, obviously improving the energy utilization rate, greatly improving the energy efficiency of the cooking equipment 100, playing an energy-saving role, and at the same time, can accelerate the cooking speed. In addition, it also reduces the temperature of the outer wall of the inner container 1 and the temperature of other structural elements outside the inner container 1, effectively improving the safety of the cooking equipment 100. Moreover, the first reflecting element 4 in the embodiment of the utility model has a high reflectivity on infrared light with a wavelength of 2-9 μm, further improving the utilization rate of the thermal energy generated by the carbon heating element 2 and reducing energy loss.

[0047] With reference to Figure 2 , Figure 3 and Figure 4 In some embodiments, the first reflecting element 4 is a first reflecting coating arranged on the inner wall of the cooking cavity 11.

[0048] The first reflecting member 4 has simple structure, is convenient to install, and effectively reduces the cost of the cooking equipment 100.

[0049] It should be understood that the first reflecting member 4 can also be a structure that is bonded, screwed or clamped on the inner wall of the cooking cavity 11, and the utility model is not limited in this regard.

[0050] In some embodiments, the first reflecting coating includes at least one of aluminum oxide, cesium tungsten oxide, tin oxide and tungsten trioxide.

[0051] Aluminum oxide is a material with high reflection performance, especially in the infrared field. Its reflectivity in the 5-12 mu radiation band is as high as 80-90%. And aluminum oxide has high mechanical strength, good thermal stability and small expansion coefficient, which can improve the hardness and bonding strength of the first reflecting coating and reduce the expansion coefficient.

[0052] Cesium tungsten oxide (also known as cesium tungsten bronze or cesium-doped tungsten oxide) has strong near-infrared shielding ability, with an infrared barrier rate of up to 95%. Cesium tungsten oxide has high absorption effect in the near-infrared region, which can block the transfer of heat and reduce the heat generated by the inner container 1 due to absorption of thermal radiation, which is conducive to preserving heat in the cooking cavity 11 and improving the heating effect of the cooking equipment 100. In addition, the cesium tungsten oxide can adjust the reflection, absorption and other optical properties of the first reflecting coating to the light, so that the first reflecting coating has a more actual demand for infrared light reflection effect in the 2-9 mu infrared light, and improves the overall reflectivity of the first reflecting coating to the 2-9 mu infrared light.

[0053] Tin oxide has good optical properties, which can enhance the reflection ability of the first reflecting coating to visible light, making the first reflecting coating look brighter and more shiny. And tin oxide has stable chemical properties, which can make the first reflecting coating better resist the erosion of external acid and alkali chemicals, help maintain the performance of the first reflecting coating, and prolong the service life of the first reflecting coating.

[0054] Tungsten trioxide has significant reflection performance in the infrared light region. The reflection characteristics of tungsten trioxide are mainly reflected in the infrared light region, especially in the 0.8-2 mu near-infrared band, tungsten trioxide shows high transmittance and reflectivity. Tungsten trioxide can adjust the reflectivity of the first reflecting coating to the 2-5 mu infrared light to a certain extent.

[0055] In the embodiment of the utility model, the first reflecting coating includes at least one of aluminum oxide, cesium tungsten oxide, tin oxide and tungsten trioxide, which effectively improves the reflectivity of the first reflecting coating to the 2-9 mu infrared light.

[0056] In some preferred embodiments, the first reflective coating comprises: aluminum oxide, cesium tungsten oxide, tin oxide, and tungsten trioxide.

[0057] In the embodiments of the utility model, the first reflective coating comprises: aluminum oxide, cesium tungsten oxide, tin oxide, and tungsten trioxide, and the aluminum oxide, the cesium tungsten oxide, the tin oxide, and the tungsten trioxide cooperate with each other to effectively improve the reflectivity of the reflective coating to the 2-9 mu radiation band.

[0058] In some embodiments, the first reflective coating comprises: aluminum oxide, and the mass percentage of the aluminum oxide is 0.71%-0.87% based on the total mass of the first reflective coating.

[0059] If the mass percentage of the aluminum oxide is less than 0.71%, the content of the aluminum oxide in the first reflective coating will be less, which will affect the reflectivity of the first reflective coating to the 5-9 mu radiation band, and will also affect the hardness and the bonding strength of the first reflective coating. If the mass percentage of the aluminum oxide is greater than 0.87%, the content of the aluminum oxide in the first reflective coating will be more, which will increase the cost of the first reflective coating, and will also affect the reflectivity of the first reflective coating to the 2-5 mu radiation band.

[0060] In the embodiments of the utility model, the range of the mass percentage of the aluminum oxide is limited, so that the reflectivity of the first reflective coating to the 2-9 mu radiation band is limited within a certain range, the reflectivity of the first reflective coating to the thermal radiation generated by the carbon heating element 2 is effectively improved, and the energy utilization rate is improved.

[0061] In some specific embodiments, the mass percentage of the aluminum oxide is any one point value or a range value between any two of 0.71%, 0.74%, 0.79%, 0.81%, and 0.87%.

[0062] In some embodiments, the first reflective coating comprises: cesium tungsten oxide, and the mass percentage of the cesium tungsten oxide is 7.13%-8.72% based on the total mass of the first reflective coating.

[0063] If the mass percentage of the cesium tungsten oxide is less than 7.13%, the content of the cesium tungsten oxide in the first reflective coating will be less, which will affect the heat insulation capacity of the first reflective coating and the reflectivity of the first reflective coating to the 2-9 mu infrared light. If the mass percentage of the cesium tungsten oxide is greater than 8.72%, the content of the cesium tungsten oxide in the first reflective coating will be more, which will increase the cost of the first reflective coating.

[0064] The embodiment of the utility model discloses the range of mass ratio of cesium tungsten oxide, make the reflectivity of first reflection coating to 2 ~ 9 mu radiation waveband be limited in certain range, effectively improve the reflectivity of first reflection coating to the heat radiation of carbonaceous heating element 2, improve the energy utilization rate.

[0065] In some specific embodiments, the mass ratio of cesium tungsten oxide is any one of 7.13%, 7.45%, 7.89%, 8.33%, 8.72% or a range value between any two of them.

[0066] In some embodiments, the first reflection coating comprises: tin oxide, and the mass ratio of the tin oxide is 1.43% to 1.74% based on the total mass of the first reflection coating.

[0067] If the mass ratio of the tin oxide is less than 1.43%, the content of the tin oxide in the first reflection coating will be less, the ability of the first reflection coating to resist the corrosion of external acid and alkali and other chemical substances will decrease, and the service life of the first reflection coating will be affected. If the mass ratio of the tin oxide is greater than 1.74%, the content of the tin oxide in the first reflection coating will be more, and the cost of the first reflection coating will increase.

[0068] In some specific embodiments, the mass ratio of the tin oxide is any one of 1.43%, 1.56%, 1.63%, 1.69%, 1.74% or a range value between any two of them.

[0069] In some embodiments, the first reflection coating comprises: tungsten trioxide, and the mass ratio of the tungsten trioxide is 2.14% to 2.61% based on the total mass of the first reflection coating.

[0070] If the mass ratio of the tungsten trioxide is less than 2.14%, the content of the tungsten trioxide in the first reflection coating will be less, and the reflectivity of the first reflection coating to the 2-5 mu radiation waveband will be affected. If the mass ratio of the tungsten trioxide is greater than 2.61%, the cost of the first reflection coating will increase, and the reflectivity of the first reflection coating to the 5-9 mu radiation waveband will be affected.

[0071] In some specific embodiments, the mass ratio of the tungsten trioxide is any one of 2.14%, 2.23%, 2.34%, 2.56%, 2.61% or a range value between any two of them.

[0072] In some embodiments, the first reflection coating further comprises: polysilazane.

[0073] The polysilazane has excellent adhesion, which is mainly due to the Si-N polarity in the structure of polysilazane. The polysilazane is combined with the substrate in the form of covalent bond, such as Si-NH-Si bond, and can be cured at room temperature. The curing process mainly involves hydrolysis and oxidation reaction of Si-NH-Si, Si- of polysilazane reacts with polar -OH of the substrate to form Si-O bond, and NH- of polysilazane can react with the polar group of the substrate. This close combination not only enhances the adhesion of the first reflective coating, but also improves the durability of the first reflective coating, so that it can maintain the reflection performance for a long time.

[0074] In addition, the polysilazane has excellent high-temperature resistance, and the hardness of the first reflective coating after curing can reach more than 8H, even up to 9H. This property enables the polysilazane in the first reflective coating to withstand thermal stress in a high-temperature environment, maintaining the stability and reflection performance of the first reflective coating.

[0075] In some embodiments, the first reflective coating further comprises: polysilazane. The mass fraction of polysilazane is 0.143% to 0.174% based on the total mass of the first reflective coating.

[0076] If the mass fraction of polysilazane is less than 0.143%, the content of polysilazane in the first reflective coating will be low, affecting the hardness, durability, high-temperature resistance and service life of the first reflective coating. If the mass fraction of polysilazane is greater than 0.174%, the content of polysilazane in the first reflective coating will be high, increasing the cost of the first reflective coating.

[0077] In some specific embodiments, the mass fraction of polysilazane is any one of 0.143%, 0.152%, 0.164%, 0.169%, 0.174% or a range value between any two of them.

[0078] In some embodiments, the first reflective coating further comprises: polysiloxane, and the mass fraction of polysiloxane is 7.13% to 8.72% based on the total mass of the first reflective coating.

[0079] The polysiloxane is beneficial to improve the adhesion of the first reflective coating, so that the first reflective coating can be well attached to the surface of the substrate material, and the first reflective coating can exist stably and is not easy to fall off. The polysiloxane can also make the first reflective coating have good flexibility, which can adapt to the stretching and deformation of different substrates, avoid the cracking of the first reflective coating and affect the reflection effect. In addition, the polysiloxane is also helpful to optimize the film forming performance of the first reflective coating, form a uniform and dense film layer, and is beneficial to regular reflection of light, thereby improving the overall reflection efficiency of the first reflective coating.

[0080] If the mass percentage of polysiloxane is less than 7.13%, the content of polysiloxane in the first reflective coating is less, which affects the adhesion, flexibility and film forming performance of the first reflective coating; if the mass percentage of polysiloxane is greater than 8.72%, the content of polysiloxane in the first reflective coating is more, which increases the cost of the first reflective coating, and further affects the reflectivity of the first reflective coating to the radiation wave band of 2-9 μm.

[0081] In some embodiments, the mass percentage of polysiloxane is any one of 7.13%, 7.66%, 7.93%, 8.42%, 8.72% or a range value between any two of them.

[0082] In some other embodiments, the first reflective coating can further include other materials, such as industrial pure water.

[0083] In some preferred embodiments, the first reflective coating includes aluminum oxide, cesium tungsten oxide, tin oxide, tungsten trioxide, polysilazane, polysiloxane and industrial pure water.

[0084] Based on the total mass of the first reflective coating, the mass percentage of aluminum oxide is 0.79%, the mass percentage of cesium tungsten oxide is 7.92%, the mass percentage of tin oxide is 1.58%, the mass percentage of tungsten trioxide is 2.38%, the mass percentage of polysilazane is 0.158%, the mass percentage of polysiloxane is 7.92%, and the mass percentage of industrial pure water is 79.252%.

[0085] In the embodiments of the utility model, the first reflective coating has a high reflectivity of 0.82 or more to the radiation wave band of 2-9 μm, which effectively improves the utilization rate of heat of the cooking equipment 100.

[0086] In some embodiments, the thickness of the first reflective coating is B1, and the cooking equipment 100 satisfies: 20 μm≤B1≤30 μm.

[0087] If the thickness B1 of the first reflective coating is less than 20 μm, the ability of the first reflective coating to reflect heat radiation is affected, and the heat insulation ability of the first reflective coating is also affected; if the thickness B1 of the first reflective coating is greater than 30 μm, the stress between the first reflective coating and the inner wall of the cooking cavity 11 is increased, which causes the first reflective coating to be prone to cracking.

[0088] In summary, in the embodiments of the utility model, the thickness B1 of the first reflective coating is limited to 20 μm≤B1≤30 μm, which not only ensures the reflection effect of the first reflective coating, but also reduces the risk of cracking of the first reflective coating, and prolongs the service life of the cooking equipment 100.

[0089] In some embodiments, the first reflective coating has a thickness B1 of any one of 20 μm, 23 μm, 27 μm, 30 μm or a range between any two of them.

[0090] In some embodiments, the cooking device 100 further comprises a door body 5 for opening or closing a receiving opening of the cooking cavity 11, the door body 5 is provided with the first reflective member 4 towards the rear surface of the cooking cavity 11 and all the inner walls of the cooking cavity 11.

[0091] According to the above technical solution, when the cooking device 100 is in operation, the door body 5 closes the receiving opening of the cooking cavity 11, so that the cooking cavity 11 forms a closed space, and the door body 5 is provided with the first reflective member 4 towards the rear surface of the cooking cavity 11 and all the inner walls of the cooking cavity 11, which can reduce the energy consumption of the cooking device 100 by 22%, improve the energy efficiency by 2 levels, and at the same time, increase the cooking speed by 28%, reduce the average temperature rise of the outer wall surface of the cooking device 100 by 19℃, and achieve high energy efficiency, fast cooking and safe use of the cooking device 100.

[0092] It should be understood that in other embodiments, only part of the inner walls of the cooking cavity 11 can be provided with the first reflective member 4, for example, only the left and right side walls are provided with the first reflective member 4, or only the top and bottom walls are provided with the first reflective member 4. The present application does not limit this.

[0093] Referring to Figure 4 , Figure 6 and Figure 7 , in some embodiments, the carbon heating member 2 comprises a first light-transmitting tube 21, a carbon heating element 22 and a second reflective member 23, the carbon heating element 22 is arranged in the first light-transmitting tube 21 and is adapted to emit heat radiation, the second reflective member 23 is arranged in the first light-transmitting tube 21 and is located outside the carbon heating element 22, the first light-transmitting tube 21 is provided with a light-transmitting region 211, and the second reflective member 23 is configured to reflect infrared light at least towards the light-transmitting region 211.

[0094] It should be noted that the raw material of the carbon heating element 22 can include natural graphite, artificial graphite and / or graphene, and the first light-transmitting tube 21 can be made of glass, light-transmitting plastic or other light-transmitting materials. Preferably, the first light-transmitting tube 21 is configured as a glass tube, which has good light-transmitting effect and high temperature resistance, thereby reducing the cost of the carbon heating member 2.

[0095] When the carbon heating element 2 is in operation, the carbon heating element 22 converts electric energy into heat radiation and radiates the heat radiation towards the peripheral side of the carbon heating element 22. The heat radiation generated by the carbon heating element 22 can be divided into two parts, one part of which propagates towards the light transmission area 211, and the other part of which propagates towards the second reflecting element 23. The heat radiation propagating towards the light transmission area 211 can be directly emitted, and the heat radiation propagating towards the second reflecting element 23 is reflected after contacting the second reflecting element 23, and the reflected heat radiation is emitted through the light transmission area 211.

[0096] It should be understood that part of the heat radiation is directly emitted to the light transmission area 211 after being reflected by the second reflecting element 23, and part of the heat radiation is emitted to other areas of the second reflecting element 23 after being reflected by the second reflecting element 23, and is emitted to the light transmission area 211 after being reflected by the second reflecting element 23 multiple times. That is, the heat radiation generated by the carbon heating element 22 is ultimately emitted through the light transmission area 211, and the user only needs to direct the light transmission area 211 of the carbon heating element 2 towards the object to be heated, so that the heat radiation generated by the carbon heating element 22 can act on the object to be heated. The heat radiation generated by the carbon heating element 22 is fully utilized, and the energy loss is reduced.

[0097] Through the above technical solution, the heat radiation generated by the carbon heating element 22 is emitted through the light transmission area 211, the directional heating capability of the carbon heating element 2 is improved, the heat radiation generated by the carbon heating element 22 can act on the object to be heated, the heat radiation generated by the carbon heating element 22 is fully utilized, and the energy loss is reduced.

[0098] In some embodiments, the carbon heating element 22 is configured as a graphene heating element. The graphene heating element has excellent performance such as fast heating, high heating temperature and high strength, which effectively improves the heating effect of the carbon heating element 2.

[0099] In some further embodiments, the second reflecting element 23 is configured to at least reflect infrared light with a wavelength of 2-9 μm.

[0100] In the embodiments of the present application, the reflection capability of the second reflecting element 23 is adapted to the heat radiation generated by the graphene heating element, so that the second reflecting element 23 is specially used for reflecting the heat radiation generated by the graphene heating element, the utilization rate of the heat energy generated by the graphene heating element is effectively improved, and the energy loss is reduced.

[0101] In other embodiments, the second reflecting element 23 can not only be used to reflect infrared light with a wavelength of 2-9 μm, but also can reflect radiation with other wavelengths. However, the reflection effect of the second reflecting element 23 on infrared light with a wavelength of 2-9 μm is better than that on radiation with other wavelengths.

[0102] In some embodiments, the first reflector 4 has a greater strength than the second reflector 23.

[0103] Because the first reflector is arranged on the inner wall of the cooking cavity 11, the first reflector is easily scratched by the user during use. In the embodiment of the present application, the strength of the first reflector 4 is greater than that of the second reflector 23, so that the first reflector 4 is more wear-resistant, the service life of the first reflector 4 is prolonged, and the reliability of the cooking device 100 is improved.

[0104] In some further embodiments, the second reflector 23 is a second reflective coating arranged on the first light-transmitting tube 21.

[0105] In the embodiment of the present application, the second reflector 23 has a simple structure and is easy to install, thereby effectively reducing the cost of the carbon heating element 2.

[0106] It should be understood that the second reflector 23 can also be a structure bonded to the first light-transmitting tube 21, and the second reflector 23 can also be arranged separately from the first light-transmitting tube 21, for example, the second reflector 23 is fixed to an external fixing member, as long as the second reflector 23 can reflect the heat radiation of the carbon heating element 22 to the light-transmitting area 211, and the present application is not limited in this regard.

[0107] In some specific embodiments, the second reflective coating includes: titanium dioxide, aluminum oxide, and barium sulfate.

[0108] Titanium dioxide is a white pigment with excellent optical properties, and its reflectivity in the infrared band is particularly outstanding. The high infrared reflectivity of titanium dioxide is due to its special crystal structure and surface properties. The ion arrangement in the crystal structure and the surface state of titanium dioxide enable it to effectively reflect infrared radiation and reduce heat absorption. Titanium dioxide has a small particle size and high transparency, and has a reflectivity of 80-90% in the near-infrared region of 0.780-2.5 μm. Barium sulfate has high reflectivity in the visible and near-infrared regions.

[0109] By incorporating appropriate amounts of other elements or compounds into titanium dioxide, its optical properties can be adjusted. In the embodiment of the present application, titanium dioxide and barium sulfate are mixed in the second reflective coating, which effectively improves the reflectivity of the second reflective coating in the 2-5 μm radiation band.

[0110] Aluminum oxide is a material with high reflectivity, especially in the infrared field. Its reflectivity in the 5-12 μm radiation band is as high as 80-90%. In the embodiment of the present application, the second reflective coating includes: titanium dioxide, aluminum oxide, and barium sulfate. The titanium dioxide, aluminum oxide, and barium sulfate cooperate to effectively improve the reflectivity of the second reflective coating in the 2-9 μm radiation band. Figure 5And Figure 8 , Figure 8 The utility model discloses a distribution diagram of infrared spectrum reflectivity of the second reflective coating, the second reflective coating in the utility model embodiment has 90% above reflectivity in 2-9mu band, and the radiation spectrum of the graphene heating element is matched, improves the reflection effect of the second reflective coating, further improves the utilization of carbon heating element 2 heat, reduces the energy loss.

[0111] In some further embodiments, the second reflective coating comprises: titanium dioxide, aluminum oxide, barium sulfate. The mass percentage of titanium dioxide is 25-40%, the mass percentage of aluminum oxide is 5-20%, and the mass percentage of barium sulfate is 20-30%, based on the total mass of the second reflective coating.

[0112] If the mass percentage of titanium dioxide is less than 25%, the reflectivity of the second reflective coating for the 2-5mu radiation band will be affected, and if the mass percentage of titanium dioxide is more than 40%, the reflectivity of the second reflective coating for the 5-9mu radiation band will be affected.

[0113] If the mass percentage of barium sulfate is less than 20%, the reflectivity of the second reflective coating for the 2-5mu radiation band will be affected, and if the mass percentage of barium sulfate is more than 30%, the reflectivity of the second reflective coating for the 5-9mu radiation band will be affected.

[0114] If the mass percentage of aluminum oxide is less than 5%, the reflectivity of the second reflective coating for the 5-9mu radiation band will be affected, and if the mass percentage of titanium dioxide is more than 20%, the reflectivity of the second reflective coating for the 2-5mu radiation band will be affected.

[0115] In the utility model embodiment, the mass percentage of titanium dioxide, the mass percentage of aluminum oxide, and the mass percentage of barium sulfate in the second reflective coating are limited, so that the reflectivity of the second reflective coating for the 2-9mu radiation band is limited within a certain range, effectively improving the reflectivity of the second reflective coating for the thermal radiation generated by the graphene heating element, and improving the energy utilization rate.

[0116] In some specific embodiments, the mass percentage of titanium dioxide is 27%, the mass percentage of aluminum oxide is 15%, and the mass percentage of barium sulfate is 28%.

[0117] Reference Figure 5The spectral radiation distribution of the graphene heating element shows that the radiation intensity of the 2-5 mu m radiation band is relatively high, and the radiation intensity of the 5-9 mu m radiation band is relatively low, in the embodiment of the utility model, the mass ratio of titanium dioxide is 27%, the mass ratio of aluminum oxide is 15%, and the mass ratio of barium sulfate is 28%, so that the reflection effect of the second reflection coating is more matched with the heat radiation generated by the graphene heating element, the reflection effect of the second reflection coating is further improved, and the energy utilization rate is improved.

[0118] In other embodiments, the mass ratio of titanium dioxide can also be any one of 25%, 28%, 30%, 33%, 38%, 40% or a range value between any two of them. In other embodiments, the mass ratio of aluminum oxide can also be any one of 5%, 8%, 10%, 13%, 18%, 20% or a range value between any two of them. In other embodiments, the mass ratio of barium sulfate can also be any one of 20%, 24%, 25%, 27%, 29%, 30% or a range value between any two of them.

[0119] Referring to Figure 6 and Figure 7 In some embodiments, the thickness of the second reflection coating is B2, and the cooking device 100 satisfies: 100 mu m <= B2 <= 150 mu m.

[0120] If the thickness B2 of the second reflection coating is less than 100 mu m, the ability of the second reflection coating to reflect heat radiation will be affected; if the thickness B2 of the second reflection coating is greater than 150 mu m, the stress between the second reflection coating and the first light-transmitting pipe 21 will be increased, which will cause the second reflection coating to be prone to cracking.

[0121] In summary, the embodiment of the utility model limits the thickness B2 of the second reflection coating to 100 mu m <= B2 <= 150 mu m, which not only ensures the reflection effect of the second reflection coating, but also reduces the risk of cracking of the second reflection coating, and prolongs the service life of the graphene heating element.

[0122] In some embodiments, the longitudinal section of the first light-transmitting pipe 21, the two ends of the second reflection member 23 are respectively point A and point B, the center of the second reflection member 23 is point O, and the central angle of the second reflection member 23 is <= AO B <= 230 DEG.

[0123] The part of the first light-transmitting pipe 21 which is not provided with the second reflection member 23 forms the above-mentioned light-transmitting area 211, the larger the central angle of the second reflection member 23 is, the smaller the light-transmitting area 211 is, and the second reflection member 23 is used for reflecting heat radiation towards the light-transmitting area 211, therefore, the size of the central angle of the second reflection member 23 is an important influencing factor of the average irradiance.

[0124] If ∠AOB is less than 190°, the area occupied by the light transmission area 211 will be too large, which will affect the directional heating function of the carbon heating element 2. If ∠AOB is greater than 230°, the area occupied by the light transmission area 211 will be too small, which will make it difficult to heat the whole object to be heated, and thus cause uneven heating of the object to be heated.

[0125] In the embodiments of the present application, the central angle ∠AOB of the second reflecting member 23 is limited to 190°≤∠AOB≤230°, which not only improves the average irradiance of the carbon heating element 2, but also improves the effect of directional heating of the carbon heating element 2.

[0126] In some specific embodiments, the central angle ∠AOB of the second reflecting member 23 is any one of 190°, 200°, 220°, 230° or a range value between any two of them.

[0127] In some embodiments, the carbon heating element 22 has a sheet structure, and at least one side of the carbon heating element 22 is arranged towards the light transmission area 211.

[0128] Because the heat radiation is emitted from the surface of the carbon heating element 22 when the carbon heating element 22 is working, in the embodiments of the present application, the carbon heating element 22 has a sheet structure, so that most of the heat radiation generated by the carbon heating element 22 is emitted from the two sides of the carbon heating element 22, and the side is arranged towards the light transmission area 211, so that more heat radiation can be directly emitted from the light transmission area 211 without being reflected by the second reflecting member 23, thereby further reducing the energy loss.

[0129] It should be understood that the carbon heating element 22 can also have other shapes, which are not limited by the present application.

[0130] In some further embodiments, the first light transmission tube 21 is provided with a protective gas wrapping the carbon heating element 22.

[0131] Because the carbon heating element 22 is easy to oxidize in a high-temperature environment, in order to prolong the service life of the carbon heating element 22, in the embodiments of the present application, a protective gas is added in the first light transmission tube 21 to avoid the carbon heating element 22 from contacting with air, thereby reducing the risk of oxidation of the carbon heating element 22 and prolonging the service life of the carbon heating element 22.

[0132] In some specific embodiments, the protective gas is argon, and in other embodiments, the protective gas can also be helium or other inert gases, and the protective gas can also be a mixed gas of a plurality of inert gases, which are not limited by the present application.

[0133] In some specific embodiments, the first light-transmitting tube 21 is provided with ceramic heads at both ends for sealing the first light-transmitting tube 21, and the carbon heating element 22 can be connected with an external power source through an electrical connector in the ceramic head. After the first light-transmitting tube 21 is subjected to vacuumization, a small amount of protective gas is introduced into the first light-transmitting tube 21.

[0134] With reference to Figure 2 , Figure 3 and Figure 4 , in some embodiments, the carbon heating element 2 is provided in a plurality, and the plurality of carbon heating elements 2 are distributed at intervals in the cooking cavity 11.

[0135] Through the above technical solution, the efficiency of the cooking equipment 100 in heating food is further improved.

[0136] In some specific embodiments, the top of the cooking cavity 11 is provided with four carbon heating elements 2, and the light-transmitting regions 211 of the four carbon heating elements 2 are all arranged downward.

[0137] In some specific embodiments, the top of the cooking cavity 11 is provided with two carbon heating elements 2, and the light-transmitting regions 211 of the two carbon heating elements 2 at the top of the cooking cavity 11 are all arranged downward. The bottom of the cooking cavity 11 is also provided with two carbon heating elements 2, and the light-transmitting regions 211 of the two carbon heating elements 2 at the bottom of the cooking cavity 11 are all arranged upward.

[0138] In other embodiments, the plurality of carbon heating elements 2 can also be arranged in other manners, which are not limited in the present application.

[0139] With reference to Figure 9 and Figure 10 , as described above, by arranging the first reflecting member 4 on the inner wall of the cooking cavity 11 and the second reflecting member 23 on the carbon heating element 2, the energy consumption of the cooking equipment 100 can be reduced by 28%, the energy efficiency level can be improved by 3 levels (EEI reduced by 30), the cooking speed can be increased by 32%, the outer wall surface temperature of the inner container 1 can be reduced by 7.7-45.9℃, and the average reduction is 26℃, thereby realizing high energy efficiency, fast cooking and safe use of the cooking equipment 100.

[0140] Other configurations and operations of the cooking equipment 100 according to the embodiments of the present application are known to those skilled in the art, and will not be described in detail here.

[0141] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0142] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A cooking apparatus, characterized by, The cooking device comprises: an inner container provided with a cooking cavity; a carbon heating element adapted to output heat radiation towards the cooking cavity; a first reflecting element provided on an inner wall of the cooking cavity, the first reflecting element being configured to reflect heat radiation towards the inner wall of the cooking cavity, the first reflecting element being configured to reflect at least infrared light with a wavelength of 2-9 μm.

2. The cooking apparatus according to claim 1, characterized in that, The first reflecting element is a first reflecting coating provided on the inner wall of the cooking cavity.

3. The cooking apparatus according to claim 2, characterized in that, The first reflecting coating has a thickness B1, and the cooking device satisfies 20 μm≤B1≤30 μm.

4. The cooking apparatus according to claim 1, characterized in that, The cooking device further comprises a door body for opening or closing a holding opening of the cooking cavity, and a rear surface of the door body towards the cooking cavity and all inner walls of the cooking cavity are provided with the first reflecting element.

5. The cooking apparatus according to any one of claims 1-4, wherein, The carbon heating element comprises: a first light-transmitting tube; a carbon heating element provided in the first light-transmitting tube and adapted to output the heat radiation; a second reflecting element provided on the first light-transmitting tube and located outside the carbon heating element, the first light-transmitting tube being provided with a light-transmitting region, and the second reflecting element being configured to reflect infrared light at least towards the light-transmitting region.

6. The cooking apparatus according to claim 5, wherein The second reflecting element is configured to reflect at least infrared light with a wavelength of 2-9 μm.

7. The cooking apparatus according to claim 5, wherein The intensity of the first reflecting element is greater than that of the second reflecting element.

8. The cooking apparatus according to claim 5, wherein The second reflecting element is a second reflecting coating provided on the first light-transmitting tube.

9. The cooking apparatus according to claim 5, wherein, The second reflecting coating has a thickness B2, and B2 satisfies 100 μm≤B2≤150 μm.

10. The cooking apparatus according to claim 5, wherein, In a longitudinal section of the first light-transmitting tube, two ends of the second reflecting element are respectively point A and point B, the center of the second reflecting element is point O, and the central angle ∠AOB of the second reflecting element satisfies 190°≤∠AOB≤230°.

11. The cooking apparatus according to claim 5, wherein The carbon heating element is a graphene heating element.

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