Heating tube and cooking equipment

Abstract

The utility model discloses a heating tube and cooking equipment. The heating tube comprises a first light-transmitting tube and a second light-transmitting tube, the carbonaceous heating element is arranged in the first light-transmitting tube and is suitable for emitting heat radiation; the reflecting part is arranged on the first light-transmitting tube and located on the outer side of the carbonaceous heating element, the first light-transmitting tube is provided with a light-transmitting area, and the reflecting part is constructed to be used for reflecting infrared light at least towards the light-transmitting area. According to the heating tube provided by the utility model, the directional heating capability of the heating tube is improved through the reflecting piece, heat radiation generated by the carbonaceous heating element can act on an object to be heated, the heat radiation generated by the carbonaceous heating element is fully utilized, and the energy loss is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the kitchen utensil field especially is involved in a heating tube and cooking equipment. BACKGROUND

[0002] The heating tube is a kind of electric appliance element specially converting electric energy into heat energy.In some related technologies, some heating tubes are structured to be suitable for generating heat radiation, and when the heating tube works, radiant energy will be dispersed in all directions.

[0003] For the above technical scheme, the radiant energy generated by the heating tube is dispersed in all directions, the energy utilization rate is low, and the loss is large. UTILITY MODEL CONTENTS

[0004] The utility model at least solves one of the technical problems existing in the prior art.The utility model provides a heating tube, the directional heating capacity of the heating tube is improved by the reflection member, the heat radiation generated by carbon heating element can be applied to the object to be heated, the heat radiation generated by carbon heating element is fully utilized, and the energy loss is reduced.

[0005] The utility model further provides a cooking equipment comprising the above heating tube.

[0006] According to the heating tube provided by the utility model, the heat radiation generated by carbon heating element is emitted through the light-transmitting region, the directional heating capacity of the heating tube is improved, the heat radiation generated by carbon heating element can be applied to the object to be heated, the heat radiation generated by carbon heating element is fully utilized, and the energy loss is reduced.

[0007] According to the heating tube provided by the utility model, the heat radiation generated by carbon heating element is emitted through the light-transmitting region, the directional heating capacity of the heating tube is improved, the heat radiation generated by carbon heating element can be applied to the object to be heated, the heat radiation generated by carbon heating element is fully utilized, and the energy loss is reduced.

[0008] In some embodiments, the reflection member is configured to at least reflect mid-infrared light.

[0009] In some embodiments, the reflection member is configured to at least reflect infrared light with a wavelength of 2-9 μm.

[0010] In some embodiments, the reflection member is a reflection coating arranged on the first light-transmitting tube.

[0011] In some embodiments, the reflection coating comprises titanium dioxide, aluminum oxide and barium sulfate.

[0012] In some embodiments, the mass percentage of the titanium dioxide is 25-40%, the mass percentage of the aluminum oxide is 5-20%, and the mass percentage of the barium sulfate is 20-30%, based on the total mass of the reflective coating.

[0013] In some embodiments, the thickness of the reflective member is δ, and δ satisfies: 20 μm≤δ≤140 μm.

[0014] In some embodiments, δ further satisfies: 70 μm≤δ≤100 μm.

[0015] In some embodiments, the first light-transmitting tube is provided with a protective gas wrapping the carbonaceous heating element.

[0016] In some embodiments, the carbonaceous heating element has a sheet-like structure, and at least one side of the carbonaceous heating element is arranged towards the light-transmitting region.

[0017] In some embodiments, the carbonaceous heating element is configured as a graphene heating element.

[0018] In some embodiments, in a longitudinal section of the first light-transmitting tube, two ends of the reflective member are point A and point B respectively, the center of the reflective member is point O, and the central angle ∠AOB of the reflective member satisfies: 180°≤∠AOB≤300°.

[0019] In some embodiments, ∠AOB further satisfies: 250°≤∠AOB≤300°.

[0020] The cooking equipment according to the embodiments of the present application comprises: an inner container, which is provided with a cooking cavity; the heating tube in the above technical solution, which is adapted to output heat radiation towards the cooking cavity.

[0021] In some embodiments, in a longitudinal section of the first light-transmitting tube, two ends of the reflective member are point A and point B respectively, a connection for connecting point A and point B is a first connection line, and an included angle between the first connection line and a horizontal plane is such that the heating tube outputs heat radiation towards the middle part of the inner container.

[0022] In some embodiments, the included angle α between the first connection line and the horizontal plane satisfies: 10°≤α≤20°.

[0023] In some embodiments, a plurality of the heating tubes are provided, the plurality of the heating tubes are arranged at intervals, and the light-transmitting region of at least one of the heating tubes is arranged obliquely towards the adjacent heating tube.

[0024] In some embodiments, the plurality of heat-generating tubes includes a first heat-generating tube and a second heat-generating tube, the first heat-generating tube and the second heat-generating tube are both arranged at the top of the cooking area, the light-transmitting area of the first heat-generating tube is arranged obliquely downward and toward the second heat-generating tube, and the light-transmitting area of the second heat-generating tube is arranged obliquely downward and toward the first heat-generating tube.

[0025] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings, in which:

[0027] Figure 1 is a cross-sectional view of a heat-generating tube according to an embodiment of the present application Figure 1 ;

[0028] Figure 2 is a cross-sectional view of a heat-generating tube according to an embodiment of the present application Figure 2 ;

[0029] Figure 3 is a spectral radiation distribution diagram of a graphene heat-generating element

[0030] Figure 4 is a distribution diagram of the infrared spectral reflectivity of a reflective coating

[0031] Figure 5 is a schematic view of a cooking device according to an embodiment of the present application

[0032] Figure 6 is a schematic view of the cooperation of a heat-generating tube and an inner container top wall according to an embodiment of the present application

[0033] Figure 7 is a table of the relationship between different coating thicknesses and cladding angles and average irradiance

[0034] Figure 8 is a table of the relationship between different angles a and the temperature uniformity and temperature rise of a cooking cavity

[0035] Reference signs: 100, heat-generating tube; 1, first light-transmitting tube; 11, light-transmitting area; 2, carbon heat-generating element; 3, reflecting element; 200, cooking device; 4, inner container; 41, cooking cavity; 5, first heat-generating tube; 6, second heat-generating tube DETAILED DESCRIPTION

[0036] Embodiments of the present application will be described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are for the purpose of explanation only and are not to be taken as limiting the present application.

[0037] In the description of the present application, 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" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the features limited as "first" and "second" can be explicitly or implicitly included one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0038] In the description of the present application, it needs to be understood that, unless otherwise 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 connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] Reference is made below Figures 1-8 The heating tube 100 according to the embodiments of the present application is described.

[0040] Reference is made below Figure 1 , Figure 2 and Figure 3 The heating tube 100 according to the embodiments of the present application comprises a first light-transmitting tube 1, a carbon heating element 2 and a reflector 3, the carbon heating element 2 is arranged in the first light-transmitting tube 1 and is adapted to emit thermal radiation, the reflector 3 is arranged in the first light-transmitting tube 1 and is located outside the carbon heating element 2, the first light-transmitting tube 1 is provided with a light-transmitting area 11, and the reflector 3 is configured to reflect infrared light at least towards the light-transmitting area 11.

[0041] It should be noted that the raw material of the carbon heating element 2 can include natural graphite, artificial graphite and / or graphene, and the first light-transmitting tube 1 can be made of glass, light-transmitting plastic or other light-transmitting materials. Preferably, the first light-transmitting tube 1 is configured as a glass tube, which has good light-transmitting effect and high temperature resistance, thereby reducing the cost of the heating tube 100

[0042] When the heating tube 100 works, the carbon heating element 2 converts electric energy into heat radiation and radiates the heat radiation towards the side of the carbon heating element 2. The heat radiation generated by the carbon heating element 2 can be divided into two parts, one part propagates towards the light-transmitting area 11, and the other part propagates towards the reflecting member 3. The heat radiation propagating towards the light-transmitting area 11 can be directly emitted, and the heat radiation propagating towards the reflecting member 3 is reflected after contacting the reflecting member 3, and the reflected heat radiation is emitted through the light-transmitting area 11.

[0043] It should be understood that part of the heat radiation is directly emitted to the light-transmitting area 11 after being reflected by the reflecting member 3, and part of the heat radiation is emitted to other areas of the reflecting member 3 after being reflected by the reflecting member 3, and is emitted to the light-transmitting area 11 after being reflected by the reflecting member 3 multiple times, that is, the heat radiation generated by the carbon heating element 2 is finally emitted through the light-transmitting area 11, and the user only needs to direct the light-transmitting area 11 of the heating tube 100 towards the object to be heated, so that the heat radiation generated by the carbon heating element 2 can act on the object to be heated, thereby fully utilizing the heat radiation generated by the carbon heating element 2 and reducing the energy loss.

[0044] According to the heating tube 100 of the embodiment of the present application, the heat radiation generated by the carbon heating element 2 is emitted through the light-transmitting area 11, thereby improving the directional heating capability of the heating tube 100, and the heat radiation generated by the carbon heating element 2 can act on the object to be heated, thereby fully utilizing the heat radiation generated by the carbon heating element 2 and reducing the energy loss.

[0045] In some embodiments, the reflecting member 3 is configured to at least reflect mid-infrared light.

[0046] Different materials have different reflection properties, and the reflection effect of different materials under different light spectra mainly depends on the composition, structure of the material and the wavelength of the radiation. In order to improve the reflection capability of the reflecting member 3 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, and the carbon heating element can generate heat radiation in the wavelength of 1-20 μm radiation band.

[0047] In the embodiment of the utility model, the reflection member 3 is configured to at least reflect mid-infrared light, and the mid-infrared light refers to radiation with a wavelength of 2.5-25 μm. In the embodiment of the utility model, the wavelength of the radiation reflected by the reflection member 3 is mostly the same as the wavelength of the heat radiation generated by the carbon heating element 2, that is, the reflection member 3 can reflect most of the heat radiation generated by the carbon heating element, thereby effectively improving the reflection effect of the reflection member 3.

[0048] In some embodiments, the carbon heating element 2 is configured as a graphene heating element, which has excellent properties such as fast heating, high heating temperature, and high strength, thereby effectively improving the heating effect of the heating tube 100.

[0049] In some further embodiments, the reflection member 3 is configured to at least reflect infrared light with a wavelength of 2-9 μm.

[0050] Refer to Figure 3 According to the spectral radiation distribution of the graphene heating element, the main radiation wavelength of the graphene heating element is 2-9 μm. Therefore, in the embodiment of the utility model, the reflection member 3 is configured to at least reflect infrared light with a wavelength of 2-9 μm, so that the heat radiation generated by the graphene heating element can be reflected to the light transmission area 11, thereby further improving the reflection effect of the reflection member 3.

[0051] In the embodiment of the utility model, the reflection ability of the reflection member 3 is adapted to the heat radiation generated by the graphene heating element, so that the reflection member 3 is specially used to reflect the heat radiation generated by the graphene heating element, thereby effectively improving the utilization rate of the heat energy generated by the graphene heating element and reducing energy loss.

[0052] In other embodiments, the reflection member 3 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 reflection member 3 on infrared light with a wavelength of 2-9 μm is better than that on radiation with other wavelengths.

[0053] In some further embodiments, the reflection member 3 is a reflection coating provided on the first light transmission tube 1.

[0054] In the embodiment of the utility model, the reflection member 3 has a simple structure and is easy to install, thereby effectively reducing the cost of the heating tube 100.

[0055] It should be understood that the reflection member 3 can also be a structure bonded to the first light transmission tube 1, or the reflection member 3 can be spaced apart from the first light transmission tube 1, for example, the reflection member 3 is fixed to an external fixing member, as long as the reflection member 3 can reflect the heat radiation of the carbon heating element 2 to the light transmission area 11, and the utility model does not limit this.

[0056] In some specific embodiments, the reflective coating includes: titanium dioxide, aluminum oxide, and barium sulfate.

[0057] Titanium dioxide is a white pigment with excellent optical properties, particularly outstanding reflectivity in the infrared band. This high infrared reflectivity stems from its unique crystal structure and surface characteristics. The ionic arrangement and surface state within the titanium dioxide crystal structure enable it to effectively reflect infrared radiation and reduce heat absorption. Titanium dioxide has a small particle size and high transparency, exhibiting 80-90% reflectivity in the near-infrared region (0.780–2.5 μm). Barium sulfate, on the other hand, exhibits high reflectivity in both the visible and near-infrared regions.

[0058] By incorporating appropriate amounts of other elements or compounds into titanium dioxide, its optical properties can be adjusted. In this embodiment of the invention, titanium dioxide and barium sulfate are mixed in the reflective coating, which effectively improves the reflectivity of the reflective coating to the 2-5 μm radiation band.

[0059] Alumina is a material with high reflectivity, especially in the infrared field. Its reflectivity reaches over 80% to 90% in the 5–12 μm radiation band. In this embodiment of the invention, the reflective coating comprises titanium dioxide, aluminum oxide, and barium sulfate. The combination of titanium dioxide, aluminum oxide, and barium sulfate effectively improves the reflectivity of the coating in the 2–9 μm radiation band. (Refer to...) Figure 3 and Figure 4 , Figure 4 The image shows the distribution of the infrared reflectance of the reflective coating. In this embodiment of the invention, the reflective coating has a reflectance of over 90% in the 2-9μm band, which matches the radiation spectrum of the graphene heating element. This improves the reflective effect of the reflective coating, further enhances the heat utilization rate of the heating tube 100, and reduces energy loss.

[0060] In some further embodiments, the reflective coating comprises titanium dioxide, aluminum oxide, and barium sulfate. Based on the total mass of the reflective coating, titanium dioxide accounts for 25-40% of the mass, aluminum oxide accounts for 5-20% of the mass, and barium sulfate accounts for 20-30% of the mass.

[0061] If the mass percentage of titanium dioxide is less than 25%, it will affect the reflectivity of the reflective coating for the 2-5 μm radiation band. If the mass percentage of titanium dioxide is greater than 40%, it will affect the reflectivity of the reflective coating for the 5-9 μm radiation band.

[0062] If the mass percentage of barium sulfate is less than 20%, it will affect the reflectivity of the reflective coating for the 2-5 μm radiation band. If the mass percentage of barium sulfate is greater than 30%, it will affect the reflectivity of the reflective coating for the 5-9 μm radiation band.

[0063] If the mass percentage of the aluminum oxide is less than 5%, the reflectivity of the reflective coating for the 5-9 μm radiation band is affected, and if the mass percentage of the titanium dioxide is higher than 20%, the reflectivity of the reflective coating for the 2-5 μm radiation band is affected.

[0064] In the embodiments of the utility model, the mass percentage of the titanium dioxide, the mass percentage of the aluminum oxide and the mass percentage of the barium sulfate in the reflective coating are limited, so that the reflectivity of the reflective coating for the 2-9 μm radiation band is limited within a certain range, the reflectivity of the reflective coating for the thermal radiation generated by the graphene heating element is effectively improved, and the energy utilization rate is improved.

[0065] In some specific embodiments, the mass percentage of the titanium dioxide is 27%, the mass percentage of the aluminum oxide is 15%, and the mass percentage of the barium sulfate is 28%.

[0066] Referring to Figure 3 It can be known from the spectral radiation distribution of the graphene heating element that the radiation intensity of the 2-5 μm radiation band is relatively high and the radiation intensity of the 5-9 μm radiation band is relatively low in the thermal radiation generated by the graphene heating element. In the embodiments of the utility model, the mass percentage of the titanium dioxide is 27%, the mass percentage of the aluminum oxide is 15%, and the mass percentage of the barium sulfate is 28%, so that the reflective effect of the reflective coating is more suitable for the thermal radiation generated by the graphene heating element, the reflective effect of the reflective coating is further improved, and the energy utilization rate is improved.

[0067] In other embodiments, the mass percentage of the titanium dioxide can also be any one of 25%, 28%, 30%, 33%, 38% and 40% or a range value between any two of them. In other embodiments, the mass percentage of the aluminum oxide can also be any one of 5%, 8%, 10%, 13%, 18% and 20% or a range value between any two of them. In other embodiments, the mass percentage of the barium sulfate can also be any one of 20%, 24%, 25%, 27%, 29% and 30% or a range value between any two of them.

[0068] In some embodiments, the thickness of the reflector 3 is δ, and δ satisfies: 20 μm≤δ≤140 μm.

[0069] Referring to Figure 7 , Figure 7 The table of the relationship between different coating thicknesses, cladding angles and average irradiance, Figure 7 The data in the row of "control" means the data measured in the example in which the heating tube 100 is not provided with the reflector 3. Referring to Figure 7As can be seen from the example with experimental number 6, compared with the heating tube 100 without reflector 3, the heat radiation intensity of the heating tube 100 with reflector 3 in this embodiment of the present invention can be increased by more than 54%.

[0070] Depend on Figure 7 It can be seen that when the angle of the reflector 3 covering the first light-transmitting tube 1 is the same, the greater the thickness δ of the reflector 3, the greater the average irradiance emitted from the light-transmitting area 11. In other words, the thickness of the reflector 3 is positively correlated with its reflective effect. If the thickness δ of the reflector 3 is less than 20 μm, the reflective ability of the reflector 3 is poor, affecting the energy utilization rate of the heating tube 100. However, the thickness of the reflector 3 cannot be increased indefinitely, because the reflector 3 is a reflective coating. An excessively thick reflective coating will increase the stress between the reflective coating and the first light-transmitting tube 1, making the reflective coating prone to cracking.

[0071] In summary, this embodiment of the utility model limits the thickness δ of the reflector 3 to 20μm≤δ≤140μm, which not only ensures the reflection effect of the reflector 3, but also reduces the risk of cracking of the reflector 3 and extends the service life of the heating tube 100.

[0072] In some further embodiments, δ further satisfies: 70μm≤δ≤100μm.

[0073] By further limiting the thickness δ of the reflector 3, the reflection effect of the reflector 3 is further improved, the risk of cracking of the reflector 3 is further reduced, and the service life of the heating tube 100 is extended.

[0074] In some specific embodiments, the thickness δ of the reflector 3 is any one of 70μm, 80μm, 90μm, and 100μm, or a range between any two.

[0075] Reference Figure 2 In some embodiments, the longitudinal section of the first light-transmitting tube 1 has two ends, point A and point B, respectively, and the center of the reflector 3 is point O. The central angle ∠AOB of the reflector 3 satisfies: 180°≤∠AOB≤300°.

[0076] The portion of the first light-transmitting tube 1 without the reflector 3 forms the aforementioned light-transmitting area 11. The larger the central angle ∠AOB of the reflector 3, the smaller the light-transmitting area 11. Since the reflector 3 is used to reflect thermal radiation toward the light-transmitting area 11, the size of the central angle ∠AOB of the reflector 3 is an important influencing factor on the average irradiance.

[0077] If the angle AOB is less than 180°, the area of the light transmission area 11 will be too large, which will affect the directional heating function of the heating tube 100. If the angle AOB is greater than 300°, the area of the light transmission area 11 will be too small, which will make it difficult to heat the whole object to be heated, and the object to be heated will not be heated evenly.

[0078] In the embodiments of the present application, the central angle of the reflecting member 3 is limited to 180°≤∠AOB≤300°, which not only improves the average irradiance of the heating tube 100, but also improves the effect of directional heating of the heating tube 100.

[0079] In some further embodiments, the angle AOB further satisfies: 250°≤∠AOB≤300°.

[0080] As can be seen from Table 1, in the example where the thickness δ of the reflecting member 3 is the same, when 250°≤∠AOB≤300°, the average irradiance of the heating tube 100 is higher, which further improves the heating effect of the heating tube 100.

[0081] In some specific embodiments, the central angle of the reflecting member 3 is any one of 250°, 260°, 280°, 290°, 300° or a range value between any two of them.

[0082] In some embodiments, the carbon heating element 2 has a sheet structure, and at least one side of the carbon heating element 2 is arranged towards the light transmission area 11.

[0083] Because the carbon heating element 2 generates heat radiation when it is working, in the embodiments of the present application, the carbon heating element 2 has a sheet structure, so that most of the heat radiation generated by the carbon heating element 2 is emitted from the two sides of the carbon heating element 2, and the side is arranged towards the light transmission area 11, so that more heat radiation can be directly emitted from the light transmission area 11 without being reflected by the reflecting member 3, which further reduces the energy loss.

[0084] It should be understood that the carbon heating element 2 can also have other shapes, which are not limited in the present application.

[0085] In some further embodiments, the first light transmission tube 1 is provided with a protective gas wrapped around the carbon heating element 2.

[0086] Because the carbon heating element 2 is easy to oxidize in a high-temperature environment, in order to prolong the service life of the carbon heating element 2, in the embodiments of the present application, a protective gas is added in the first light transmission tube 1 to avoid the carbon heating element 2 from contacting with air, which reduces the risk of oxidation of the carbon heating element 2 and prolongs the service life of the carbon heating element 2.

[0087] In some specific embodiments, the protective gas is argon, in other embodiments, the protective gas can also be helium or other inert gas, the protective gas can also be a mixture of various inert gases, the utility model is not limited to this.

[0088] In some specific embodiments, the first light-transmitting tube 1 is provided with ceramic heads at both ends for sealing the first light-transmitting tube 1, the carbon heating element 2 can be connected with an external power supply through an electrical connector in the ceramic head, and a small amount of protective gas is introduced into the first light-transmitting tube after vacuumizing the first light-transmitting tube.

[0089] The following refers to Figures 1-8 An embodiment of the utility model is described.

[0090] According to the heating tube 100 of the utility model embodiment, comprising: first light-transmitting tube 1, carbon heating element 2 and reflector 3, carbon heating element 2 is located in first light-transmitting tube 1 and is suitable for emitting heat radiation, reflector 3 is located in first light-transmitting tube 1 and is located on the outside of carbon heating element 2, first light-transmitting tube 1 is provided with light-transmitting area 11, and reflector 3 is configured to reflect infrared light at least towards light-transmitting area 11.

[0091] The first light-transmitting tube 1 is configured as a glass tube.

[0092] The reflector 3 is configured to reflect at least mid-infrared light.

[0093] The carbon heating element 2 is configured as a graphene heating element.

[0094] The reflector 3 is configured to reflect at least infrared light with a wavelength of 2-9 μm.

[0095] The reflector 3 is a reflective coating provided on the first light-transmitting tube 1.

[0096] The reflective coating comprises titanium dioxide, aluminum oxide and barium sulfate.

[0097] 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%.

[0098] The thickness δ of the reflector 3 is 100 μm.

[0099] The longitudinal section of the first light-transmitting tube 1, the two ends of the reflector 3 are point A and point B respectively, the center of the reflector 3 is point O, and the central angle ∠AOB of the reflector 3 is 250°.

[0100] The carbon heating element 2 has a sheet structure, and at least one side of the carbon heating element is arranged towards the light-transmitting area 11.

[0101] The first light-transmitting tube 1 is provided with a protective gas wrapping the carbon heating element 2, and the protective gas is argon.

[0102] Referring to Figure 2 , Figure 5 and Figure 6 , the cooking equipment 200 according to the embodiment of the present application comprises: an inner container 4 and a heating tube 100, the heating tube 100 is the heating tube 100 in the above technical solution, the inner container 4 is provided with a cooking cavity 41, and the heating tube 100 is adapted to output heat radiation towards the cooking cavity 41.

[0103] According to the cooking equipment 200 of the embodiment of the present application, the heat radiation generated by the carbon heating element 2 is emitted through the light transmission area 11, the heat radiation generated by the carbon heating element 2 can be applied to the food to be heated, the heat radiation generated by the carbon heating element 2 is fully utilized, the energy loss is reduced, the heating speed of the cooking equipment 200 is improved, and the cooking effect of the cooking equipment 200 is improved.

[0104] In some embodiments, in the longitudinal section of the first light transmission tube 1, the two ends of the reflecting element 3 are point A and point B respectively, the connecting line for connecting point A and point B is the first connecting line, and there is an included angle between the first connecting line and the horizontal plane, so that the heating tube 100 outputs heat radiation towards the middle part of the inner container 4.

[0105] The part of the first light transmission tube 1 which is not provided with the reflecting element 3 forms the light transmission area 11, and there is an included angle between the first connecting line and the horizontal plane, that is, the light transmission area 11 is inclined relative to the horizontal plane, so that the heat radiation emitted by the heating tube 100 can be output towards the middle part of the inner container 4, so as to heat the food in the middle part of the inner container 4, and the cooking effect of the cooking equipment 200 is improved.

[0106] In some further embodiments, the included angle α between the first connecting line and the horizontal plane satisfies: 10°≤α≤20°.

[0107] Referring to Figure 8 , Figure 8 is a table showing the relationship between different angles α and the temperature rising and temperature uniformity of the cooking cavity, Figure 8 the data in the row where “control” is located refers to the data measured in the example in which the heating tube 100 is not provided with the reflecting element 3. Figure 8 It can be known from that in the embodiment of the present application, by arranging the reflecting element 3 on the heating tube 100, the directional heating capacity of the heating tube 100 is improved, and the temperature rising speed in the cooking cavity 41 is effectively improved.

[0108] And it can be known from Figure 8 that the size of the included angle α between the first connecting line and the horizontal plane will affect the temperature rising speed of the cooking cavity 41 and the temperature range in the cooking cavity 41.

[0109] If the included angle a is less than 10°, the heat radiation of the heating tube 100 to the middle part of the inner container 4 is less, and the temperature rising speed of the cooking cavity 41 is poor; if the included angle a is greater than 20°, the heat radiation of the heating tube 100 to the middle part of the inner container 4 is too much, and the temperature difference of different positions in the cooking cavity 41 is too large, which affects the uniformity of food heating.

[0110] In the embodiments of the utility model, the included angle a between the first connecting line and the horizontal plane is limited to 10°≤a≤20°, which not only limits the output direction of the radiation of the heating tube 100 and improves the temperature rising speed of the cooking cavity 41, but also avoids that the temperature difference in the cooking cavity 41 is too large and improves the uniformity of food heating.

[0111] In some specific embodiments, the included angle a between the first connecting line and the horizontal plane is 17.7°. Compared with the example without the reflecting member, the heating tube 100 of the embodiments of the utility model is provided with the reflecting member 3, the included angle a between the first connecting line of the reflecting member 3 and the horizontal plane is 17.7°, which not only ensures the uniformity of the temperature in the cooking cavity 41, but also can improve the temperature rising speed of the cooking cavity 41 by more than 20%.

[0112] In some other specific embodiments, the included angle a between the first connecting line and the horizontal plane is any one point value or a range value between any two of 10°, 13°, 14°, 18° and 20°.

[0113] In some embodiments, the heating tube 100 is provided in plurality, and the plurality of heating tubes 100 are arranged at intervals, and the light-transmitting region 11 of at least one heating tube 100 is arranged obliquely towards the adjacent heating tube 100.

[0114] Through the above technical solution, the area irradiated by at least one heating tube 100 can at least partially coincide with the area irradiated by the adjacent heating tube 100, which improves the heating speed of the coincident area and thus improves the heating effect of the cooking device 200.

[0115] In some specific embodiments, the plurality of heating tubes 100 includes a first heating tube 5 and a second heating tube 6, and the first heating tube 5 and the second heating tube 6 are both arranged at the top of the cooking cavity 41, the light-transmitting region 11 of the first heating tube 5 is arranged obliquely downward and towards the second heating tube 6, and the light-transmitting region 11 of the second heating tube 6 is arranged obliquely downward and towards the first heating tube 5.

[0116] In the above technical solution, the arrangement of the plurality of heating tubes 100 in the cooking device 200 is simple and facilitates installation, which reduces the cost of the cooking device 200; when the cooking device 200 works, the first heating tube 5 and the second heating tube 6 can both output heat radiation towards the middle part of the inner container 4, which effectively improves the temperature rising speed of the middle part of the inner container 4 and improves the heating effect of the cooking device 200.

[0117] It should be understood that the number of heating tubes 100 in the cooking device 200 can also be three, four or other numbers, and the present application does not limit this; the arrangement mode of the heating tubes 100 in the cooking device 200 can also be other modes, for example, distributed at positions close to the left side wall and / or the right side wall of the cooking cavity 41, or distributed at the bottom of the cooking cavity 41, and the present application does not limit this.

[0118] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" 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 application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0119] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A heat-generating tube, characterized by include: First light-transmitting tube; A carbon heating element, wherein the carbon heating element is disposed inside the first light-transmitting tube and is adapted to emit thermal radiation; A reflector is disposed on the first light-transmitting tube and located outside the carbon heating element. The first light-transmitting tube has a light-transmitting area, and the reflector is configured to reflect infrared light at least toward the light-transmitting area.

2. The heat-generating tube according to claim 1, characterized in that The reflector is configured to reflect at least mid-infrared light.

3. The heat-generating tube according to claim 1, wherein The reflector is configured to reflect infrared light with a wavelength of 2 to 9 μm.

4. The heat-generating tube according to claim 3, characterized in that The reflective element is a reflective coating disposed on the first light-transmitting tube.

5. The heat-generating tube according to claim 4, characterized in that The thickness of the reflector is δ, which satisfies the following condition: 20μm≤δ≤140μm.

6. The heat-generating tube according to claim 5, characterized in that δ further satisfies: 70μm≤δ≤100μm.

7. The heat-generating tube according to claim 1, wherein The first light-transmitting tube contains a protective gas that encloses the carbon heating element.

8. The heat-generating tube of claim 1, wherein The carbon heating element has a sheet-like structure, and at least one side of the carbon heating element is disposed facing the light-transmitting area.

9. The heat-generating tube of claim 1, wherein The carbon heating element is constructed as a graphene heating element.

10. The heat-generating tube according to any one of claims 1 to 9, characterized in that In the longitudinal section of the first light-transmitting tube, the two ends of the reflector are point A and point B, respectively, the center of the reflector is point O, and the central angle ∠AOB of the reflector satisfies: 180°≤∠AOB≤300°.

11. The heat-generating tube according to claim 10, characterized in that ∠AOB further satisfies: 250°≤∠AOB≤300°.

12. A cooking apparatus, characterized by, include: The inner pot is provided with a cooking cavity; The heating element according to any one of claims 1-11 is adapted to output heat radiation toward the cooking cavity.

13. The cooking apparatus according to claim 12, characterized in that, In the longitudinal section of the first light-transmitting tube, the two ends of the reflector are point A and point B, respectively. The connecting line for connecting point A and point B is the first connecting line. There is an angle between the first connecting line and the horizontal plane so that the heating tube outputs heat radiation toward the middle of the inner liner.

14. The cooking apparatus according to claim 13, wherein, The angle α between the first connecting line and the horizontal plane satisfies: 10°≤α≤20°.

15. The cooking apparatus of claim 12, wherein, The heating element is provided in multiple ways, and the multiple heating elements are arranged at intervals. The light-transmitting area of ​​at least one heating element is inclined toward the adjacent heating element.

16. The cooking apparatus according to claim 15, wherein, The plurality of heating elements include a first heating element and a second heating element. Both the first heating element and the second heating element are disposed at the top of the cooking cavity. The light-transmitting area of ​​the first heating element faces downward and is inclined toward the second heating element, and the light-transmitting area of ​​the second heating element faces downward and is inclined toward the first heating element.

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