CN212066447U

CN212066447U - Reliable cooking utensil

Info

Publication number: CN212066447U
Application number: CN202020024480.6U
Authority: CN
Inventors: 朱泽春; 刘远; 吴超; 刘海亮
Original assignee: Hangzhou Joyoung Household Electrical Appliances Co Ltd
Current assignee: Hangzhou Jiuchuang Home Appliances Co ltd
Priority date: 2020-01-07
Filing date: 2020-01-07
Publication date: 2020-12-04
Anticipated expiration: 2030-01-07

Abstract

The utility model relates to a reliable cooking utensil, including the culinary art chamber, be located the control circuit board of culinary art chamber outside portion and install the heating tube in the culinary art intracavity, the heating tube includes container, the flaky heat-generating body of suspension in the container, wears out the power supply portion at container both ends, and power supply portion is connected at the both ends of heat-generating body, the both ends of heat-generating body are equipped with first heat-generating area and second heat-generating area respectively, and first heat-generating area is close to control circuit board one side, and the temperature in first heat-generating area is less than the temperature in second heat-generating area. The utility model provides a technical scheme can reduce the temperature that the culinary art chamber is close to control circuit board one side, makes control circuit board can normally work, prolongs control circuit board's life, improves cooking utensil's reliability.

Description

Reliable cooking utensil

Technical Field

The utility model relates to a kitchen utensil field particularly, relates to a reliable cooking utensil.

Background

Patent CN101861758A discloses a heat generating tube, which is composed of a heat-resistant glass tube, a heat generating body and a power supply part, wherein the heat generating body is a thin film sheet made of a material containing a carbon-based substance, has two-dimensional isotropic heat conductivity in the plane direction, and can rapidly heat up and efficiently generate heat overall when energized. Therefore, the heating tube is gradually applied to the cooking utensil to replace the existing heating tube with slow heating temperature rise, and further the cooking efficiency of the cooking utensil is improved.

The existing cooking appliance usually controls the cooking process by a control circuit board, for example, the electric oven is provided with the control circuit board outside the cooking cavity to control the cooking process of the oven, but the control circuit board has poor heat resistance, and the normal use of the control circuit board can be influenced when the electric oven is in a high-temperature environment for a long time. And because the heating tube generates heat quickly, the temperature in the cooking cavity can reach the preset temperature in a very short time, and meanwhile, the temperature of the surrounding environment of the control circuit board is quickly raised, so that heat impact is generated on the control circuit board, the use reliability of the control circuit board is reduced, the service life of the control circuit board is even influenced, and the reliability of the cooking appliance is further reduced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a reliable cooking utensil.

The utility model discloses a following technical scheme realizes:

the utility model provides a reliable cooking utensil, includes the culinary art chamber, is located the control circuit board of culinary art chamber outside portion and installs the heating tube in the culinary art intracavity, and the heating tube includes the container, suspends the flaky heat-generating body in the container, wears out the power supply portion at container both ends, and the power supply portion is connected at the both ends of heat-generating body, the both ends of heat-generating body are equipped with first heat-generating area and second heat-generating area respectively, and first heat-generating area is close to control circuit board one side, and the temperature in first heat-generating area is less than the temperature in second heat.

Further, the length ratio of the first heating area to the heating element is 0.15-0.2.

Further, the heating element comprises wide parts and narrow sub-parts, the wide parts and the narrow sub-parts are alternately arranged in the length direction of the heating element, and the width of the narrow sub-parts of the first heating area is larger than that of the narrow sub-parts of the second heating area.

Furthermore, the width of the narrow auxiliary part of the first heat-generating area is W1, the width of the narrow auxiliary part of the second heat-generating area is W2, and W1 is more than or equal to 1.5W2 and less than or equal to 3.5W 2.

Furthermore, a cutting slit is arranged in the middle of the wide part, and the length of the cutting slit of the first heating area is smaller than that of the second heating area.

Further, the length ratio of the cutting seams of the first heating area to the cutting seams of the second heating area is 0.35-0.8.

Further, the middle part of the wide width part of the first heat-generating area is provided with a slit, and the minimum distance between the end part of the slit and the end part of the wide width part is larger than the minimum distance between the side part of the slit and the side part of the wide width part.

Further, the minimum distance between the end part of the slit and the end part of the wide-width part is L1, and the minimum distance between the side part of the slit and the side part of the wide-width part is L2, L1 is more than or equal to 1.05L2 and less than or equal to 1.5L 2.

Furthermore, the outer wall of the container is provided with a salient point for marking the installation direction.

Furthermore, the salient points are arranged on the outer wall of the container corresponding to the first heating area or the second heating area.

Compared with the prior art, the beneficial effects of adopting the technical scheme are that:

1. the two ends of the heating body are respectively provided with a first heating area and a second heating area, the first heating area is close to one side of the control circuit board, the temperature of the first heating area is lower than that of the second heating area, the temperature of the cooking cavity close to one side of the control circuit board is reduced, the control circuit board can work normally, the service life of the control circuit board is prolonged, and the reliability of the cooking appliance is improved.

2. The length ratio of the first heating area to the heating element is 0.15-0.2, so that the temperature of one side of the cooking cavity close to the control circuit board is relatively low, the control circuit board can work normally, the temperature field in the cooking cavity is not affected, and the cooking efficiency of the cooking appliance is ensured.

3. The heating body comprises a wide part and a narrow auxiliary part, the wide part and the narrow auxiliary part are alternately arranged in the length direction of the heating body, the width of the narrow auxiliary part of the first heating area is larger than that of the narrow auxiliary part of the second heating area, and the resistance of the heating body is increased in the limited area of the heating body, so that the heat radiation quantity of the heating body is improved, the cooking period is shortened, and the cooking efficiency is improved.

4. The middle position of the wide width part is provided with a cutting seam, the cutting seam length of the first heating area is smaller than that of the second heating area, and further, the resistance of the heating body is increased on the limited area of the heating body, so that the heat radiation quantity of the heating body is improved, the cooking period is shortened, and the cooking efficiency is improved.

5. The middle part of the wide width part of the first heating area is provided with a cutting slit, the minimum distance between the end part of the cutting slit and the end part of the wide width part is larger than the minimum distance between the side part of the cutting slit and the side part of the wide width part, the resistance between the end part of the cutting slit and the end part of the wide width part is reduced according to the calculation formula of the resistance, the resistance between the side part of the cutting slit and the side part of the wide width part is increased, the heat radiation quantity of a container area close to the first heating area is reduced and the heat radiation quantity of an area far away from the first heating area is increased due to the direct proportion of the resistance of the heating element and the temperature, the heat radiation quantity of the container corresponding to the first heating area in the circumferential direction tends to be consistent, the uniform heating of the container area corresponding to the first heating area is realized, the temperature of the side wall of the cooking cavity close to one side of the, the service life of the control circuit board is prolonged, and the reliability of the cooking appliance is improved.

6. The outer wall of the container is provided with the salient points for marking the installation direction, so that the heating tube is convenient to install in the cooking cavity, and the assembly accuracy and the assembly efficiency are improved.

Drawings

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

FIG. 1 is a schematic structural diagram of a cooking appliance according to an embodiment;

FIG. 2 is a schematic structural diagram of a heat pipe according to an embodiment;

FIG. 3 is a schematic view showing a structure of a heat-generating body according to the first embodiment;

FIG. 4 is an enlarged view of A in FIG. 3;

FIG. 5 is a cross-sectional view of a cooking chamber according to the first embodiment;

FIG. 6 is a schematic structural view of a heating tube according to a second embodiment;

the corresponding reference numbers for the component names in the figures are as follows:

100. a cooking appliance; 10. a heat generating tube; 11. a heating element; 113. a first heat-generating zone; 114. a second heat generation region; 115. a wide part; 116. a narrow secondary portion; 117. cutting a seam; 118. a third heat generation region; 12. a power supply unit; 121. a holder; 122. a support member; 123. an inner lead; 124. a molybdenum foil; 125. an external lead; 13. a container; 14. salient points; 20. a cooking cavity; 21. a food material placement area; 22. an upper wall; 23. a transition section; 24. a rear wall; 25 lower wall; 30. a display control panel; 40. the oven door.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described with reference to the accompanying drawings and specific embodiments.

Example one

As shown in fig. 1-4, the utility model provides a reliable cooking utensil 100, including culinary art chamber 20, be located the display control panel 30 and the control circuit board (not shown) outside culinary art chamber 20 and install the heating tube 10 in culinary art chamber 20, control circuit board is located the rear portion of display control panel 30, and heating tube 10 includes container 13, suspension in container 13 flaky heat-generating body 11, wear out the power supply portion 12 at container 13 both ends, and power supply portion 12 is connected at the both ends of heat-generating body 11, heating tube 10 installs in the upper portion of culinary art chamber 20, can make in the infrared ray that heating tube 10 sent can effectual infiltration food, reduces other parts in the culinary art chamber 20 and to infrared ray's sheltering from, improve cooking efficiency and energy-conservation.

In this embodiment, a first heat-generating region 113 and a second heat-generating region 114 are respectively disposed at two ends of the heat-generating body 11, a third heat-generating region 118 is disposed between the first heat-generating region 113 and the second heat-generating region 114, the first heat-generating region 113 is close to one side of the control circuit board, the temperature of the first heat-generating region 113 is lower than that of the second heat-generating region 114, and the temperature of the cooking cavity 20 close to one side of the control circuit board is reduced, so that the control circuit board can normally operate, the service life of the control circuit board is prolonged, and the reliability of the cooking appliance.

Specifically, the heating element 11 includes wide portions 115 and narrow sub-portions 116, the wide portions 115 and the narrow sub-portions 116 are alternately arranged in the longitudinal direction of the heating element 11, the width W1 of the narrow sub-portions 116 of the first heat generation region 113 is larger than the width W2 of the narrow sub-portions 116 of the second heat generation region 114, and 1.5W2 ≤ W1 ≤ 3.5W 2; the middle position of the wide width part 115 is provided with a cutting slit 117, the length of the cutting slit 117 of the first heating area 113 is less than the length 117 of the cutting slit of the second heating area 114, the length ratio of the cutting slit 117 of the first heating area 113 to the cutting slit 117 of the second heating area 114 is 0.35-0.8, and the resistance of the heating element 11 is increased on the limited area of the heating element 11, so that the heat radiation quantity of the heating element 11 is improved, the cooking period is shortened, and the cooking efficiency is improved.

In the present embodiment, the middle portion of the wide portion 115 of the first heat-generating region 113 is provided with the slit 117, the minimum distance L1 between the end portion of the slit 117 and the end portion of the wide portion 115 is greater than the minimum distance L2 between the side portion of the slit 117 and the side portion of the wide portion 115, and 1.05L2 is not less than L1 and not more than 1.5L2, as can be seen from the calculation formula of the resistance, the resistance between the end portion of the slit 117 and the end portion of the wide portion 115 is reduced, the resistance between the side portion of the slit 117 and the side portion of the wide portion 115 is increased, since the resistance of the heat-generating body 11 is proportional to the temperature, the heat radiation amount of the container 13 region closer to the first heat-generating region 113 is reduced, and the heat radiation amount of the container 13 farther from the first heat-generating region 113 is increased, so that the heat radiation amount of the container 13 corresponding to the first heat-generating region 113 tends to be uniform in the circumferential direction, thereby realizing that the region of the, therefore, the temperature of the side wall of the cooking cavity 20 close to one side of the control circuit board is uniform, the influence on the performance of the control circuit board is reduced, the service life of the control circuit board is prolonged, and the reliability of the cooking utensil is improved.

In this embodiment, the length ratio of the first heat-generating region 113 to the heat-generating body 11 is 0.15-0.2, so as to ensure that the temperature of the cooking cavity 20 near the control circuit board is relatively low, so that the control circuit board can work normally, ensure that the temperature field in the cooking cavity 20 is not affected, and ensure the cooking efficiency of the cooking appliance.

In this embodiment, the temperature of the third heat-generating region 118 is lower than that of the first heat-generating region, so that the heat concentration in the middle region of the cooking cavity 20 during the cooking process can be reduced, and the food is prevented from being scorched due to the excessive temperature generated by the heat concentration, thereby preventing the cooking effect from being affected.

It can be understood that the third heat generating region 118 includes wide portions 115 and narrow sub-portions 116, the wide portions 115 and the narrow sub-portions 116 are alternately arranged in the length direction of the heat generating body 11, and a slit 117 is arranged in the middle of the wide portions 115, so that the temperature of the third heat generating region 118 can be adjusted, and further, the third heat generating region is matched with the first heat generating region 113 and the second heat generating region 114, so as to further optimize the temperature field in the cooking cavity 20, so that the temperature in the cooking cavity is more uniform, and the cooking effect and the cooking efficiency are improved.

In the present embodiment, the heating element 11 is in the form of a thin film sheet mainly composed of a carbon-based substance and having two-dimensional isotropic thermal conductivity in the plane direction, and has flexibility, flexibility and elasticity, and the heat conductivity of the heating element is 200W/(m · K) and the thickness is 300 μm or less, and it is understood that the thickness of the heating element may be 100 μm, 150 μm, 200 μm, 250 μm, or the like; among them, the heat-generating body 11 may be constituted of carbon fiber, and a specific production method of the heat-generating body 11 is referred to a production method disclosed in patent CN 1622695B. The heat generating body 11 made of the carbon fiber cannot be subjected to the cutting process because the heat conduction performance of the carbon fiber in the longitudinal direction is rapidly deteriorated when the carbon fiber is partially cut, so that the temperature of the heat generating body 11 is not uniform and the reliability is lowered; the heating body 11 can also be a graphite sheet which has the processing design property, so that the temperature range on the heating tube can be adjusted; preferably, the heating element 11 is a graphite sheet.

The graphite flake is obtained by performing high-temperature heat treatment on a polymer film or a polymer film added with 0.2-20 wt% of a filler, and the preparation method of the graphite flake adopts a conventional preparation method of the graphite flake in the field.

In the present embodiment, the power supply unit 12 includes a holder 121 attached to both ends of the heating element, a supporter 122, an inner lead 123, molybdenum foils 124, and outer leads 125, the holder 121 fixes the inner lead 123, the inner lead 123 is electrically connected to the outer leads 125 led out from both ends of the container 13 to the outside of the container through the molybdenum foils 124 embedded in both end sealing portions of the container 13, the supporter 122 is provided on the inner lead 123, and the supporter 122 is a coil support frame.

It is understood that the material of the holder 121, the supporter 122, the inner lead 123 and the outer lead 125 is molybdenum metal.

It will be understood that the container 13 is closed or not. The container is not closed under the relatively low-temperature use environment below 800 ℃, so that the influence on the service life of the heating tube is small; preferably, the container 13 is closed.

In the present embodiment, both ends of the container 13 are melted into a flat plate shape, and an inert gas, which is a mixed gas of argon, nitrogen, argon and xenon, or argon and krypton, is filled inside the container to prevent oxidation of the heating element; the container 13 is made of a heat-resistant material, such as quartz glass, soda-lime glass, boric acid glass, lead glass and other glass materials; preferably, the container is a quartz glass tube.

It is to be understood that, in the present embodiment, the wide width portion 115 and the narrow width portion 116 are formed by laser cutting the heat-generating body 11. Specifically, the heating element 11 is processed by pulse laser to obtain a desired shape, wherein, for the cutting seam with the cutting seam width of more than 80 μm, the wavelength of 1064nm is selected for processing, and as the laser under the wavelength belongs to thermal processing, the melting, ablation and evaporation are generated on the surface of the material, so that the complete ablation at the cutting seam is realized, and the processing quality of the heating element is improved; selecting short wavelength laser with wavelength of 532nm or 355nm for cutting slit with width below 80 μm; wherein, the heating element is cut and processed by adopting the pulse frequency of 20kHz, the pulse width of 70ns, the power of 30W and the cutting speed of 100mm/s, so that the heating element 11 is ensured to be cut and formed at one time, repeated cutting is avoided, and the processing efficiency and the precision are improved.

In the present embodiment, the cooking cavity 20 has a square structure, which is common in the field of oven technology; it can also be understood that a transition portion 23 is respectively disposed between the upper wall 22 and the rear wall 24 of the cooking cavity 20 and between the rear wall 24 and the lower wall 25, so as to increase the volume of the cooking cavity 20 and avoid the excessive temperature inside the cooking cavity 20 from burning the food, as shown in fig. 5.

Example two

As shown in fig. 6, the second embodiment of the present invention is different from the first embodiment in that, in the second embodiment, the outer wall of the container 13 is provided with the protruding points 14 for marking the installation direction, so that the heating tube can be conveniently installed in the cooking cavity 20, thereby improving the accuracy and the assembly efficiency of the assembly.

Preferably, the bumps 14 are disposed on the outer wall of the container 13 corresponding to the first heat generating area 113 or the second heat generating area 114.

In the embodiment, the height of the bump 14 is 1-5mm, which is convenient for the heating tube 11 to identify the bump 14 in the assembling process, and prevents the bump 14 from being too high and causing damage in the processes of carrying, mounting and the like, which results in the rejection of the heating tube.

It will be appreciated that the bumps 14 are provided during the forming of the container 13; the salient points 14 may also be provided during the manufacturing process of the heating tube, specifically, the middle part of the container 13 is provided with an air duct communicated with the inside of the container 13, after the heating body 11, the power supply part 12 and the container 13 are assembled, two ends of the container 13 are melted and sealed, the container 13 is vacuumized and filled with inert gas through the air duct, and then the air duct is fused and sealed to the container 13, so that the salient points 14 are formed on the outer wall of the container 13.

Other structures and effects of the parts not described are the same as those of the first embodiment, and are not described in detail here.

In addition to the preferred embodiments described above, other embodiments of the present invention are also possible, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, which should fall within the scope of the present invention defined by the appended claims.

Claims

1. A reliable cooking utensil comprises a cooking cavity, a control circuit board and a heating tube, wherein the control circuit board is positioned at the outer side part of the cooking cavity, the heating tube is arranged in the cooking cavity, the heating tube comprises a container, a flaky heating body suspended in the container and power supply parts penetrating out of two ends of the container, and the two ends of the heating body are connected with the power supply parts.

2. The reliable cooking utensil of claim 1 wherein the ratio of the length of the first heat generating zone to the length of the heat generating body is 0.15 to 0.2.

3. The reliable cooking utensil of claim 1, wherein the heat-generating body includes wide portions and narrow sub-portions, the wide portions and the narrow sub-portions being alternately arranged in a length direction of the heat-generating body, and a width of the narrow sub-portion of the first heat-generating region is larger than a width of the narrow sub-portion of the second heat-generating region.

4. The reliable cooking utensil of claim 3 wherein the narrow sub-portion of the first heat-generating zone has a width W1, and the narrow sub-portion of the second heat-generating zone has a width W2, 1.5W2 ≦ W1 ≦ 3.5W 2.

5. The reliable cooking utensil of claim 4 wherein the wide width portion has a slit at a center thereof, and the slit length of the first heat generating area is shorter than the slit length of the second heat generating area.

6. The reliable cooking utensil of claim 5 wherein the ratio of the length of the slits of the first heat generating area to the length of the slits of the second heat generating area is 0.35-0.8.

7. The reliable cooking utensil of claim 5 wherein the middle portion of the wide width portion of the first heat-generating region is provided with slits, and the minimum distance between the end portions of the slits and the end portions of the wide width portion is greater than the minimum distance between the side portions of the slits and the side portions of the wide width portion.

8. The reliable cooking utensil of claim 7 wherein the minimum distance between the ends of the slits and the ends of the wide width portion is L1, the minimum distance between the sides of the slits and the sides of the wide width portion is L2, 1.05L 2L 1L 2L 1.5L 2.

9. The reliable cooking utensil of any one of claims 1-8 wherein the outer wall of the container is provided with a raised point to indicate the direction of installation.

10. The reliable cooking utensil of claim 9 wherein the raised points are located on the outer wall of the container corresponding to the first heat-generating zone or the second heat-generating zone.