CN213754997U - Heating sheet, heating tube and electric appliance - Google Patents
Heating sheet, heating tube and electric appliance Download PDFInfo
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- CN213754997U CN213754997U CN202022484974.5U CN202022484974U CN213754997U CN 213754997 U CN213754997 U CN 213754997U CN 202022484974 U CN202022484974 U CN 202022484974U CN 213754997 U CN213754997 U CN 213754997U
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Abstract
The utility model discloses a piece, heating tube and electrical apparatus generate heat. The heating sheet comprises a graphite sheet base body, the graphite sheet base body is provided with a heating area and a buffer area, the buffer area is located at two end portions of the graphite sheet base body, the heating area is connected with the buffer area and located on one side, far away from the end portions, of the buffer area, the heating area is provided with a hollow area, and the duty ratio of the buffer area is larger than that of the heating area. Therefore, the heating sheet has the advantages of good impact resistance and strong fracture resistance.
Description
Technical Field
The utility model relates to an electrical apparatus technical field specifically, relates to generate heat piece, heating tube and electrical apparatus.
Background
The heating tube is used as a core component of a kitchen electrical appliance for baking and cooking such as an electric oven, and the heating efficiency, the response speed, the impact current and the like of the heating tube become important indexes for measuring the performance of the heating tube. The existing heating tube has the problems of heating dispersion, low response speed and the like due to the problems of low heat conduction of heating materials, low energy utilization rate of a heating mode and the like.
Therefore, the current heating sheet, heating tube and electric appliance still need to be improved.
SUMMERY OF THE UTILITY MODEL
The present application is made based on the findings of the inventors on the following problems:
the heating mode is a heating tube for linear heating, the radiation heat transfer direction of the heating tube is radial periphery, and the problems of heating dispersion and low energy utilization rate exist. In addition, it takes several tens of seconds or more from the start of energization to the surface heating to the maximum temperature of the conventional heating tube, the response speed is slow, and the resistivity of the heating wire of the heating tube changes with the temperature rise, and a large inrush current exists in the process. The inventor finds that the graphite heating tube has the characteristics of high heating efficiency, high response speed and small impact current. However, the graphite sheet is brittle and is susceptible to fracture when subjected to mechanical impact. When the heating tube in the existing electric oven is assembled, the heating tube is in rigid contact with the wall surface of the electric oven, and the heating tube can bear stress transmitted from the wall surface of the oven in the falling process of the electric oven, so that the heating sheet in the light-emitting tube is broken.
The present invention aims to alleviate or solve at least one of the above mentioned problems to at least some extent.
In an aspect of the utility model, the utility model provides a heating sheet, heating sheet includes the graphite flake base member, the graphite flake base member has heating area and buffers, the buffers are located two tip of graphite flake base member, heating area with the buffers link to each other and are located the buffers are kept away from one side of tip, heating area has the fretwork region, the duty cycle of buffers is greater than the duty cycle in heating area. Therefore, the heating sheet has the advantages of good impact resistance and strong fracture resistance.
Specifically, along the extending direction of the graphite sheet substrate, the length of the buffer zone is 5-60 mm.
Specifically, the buffer area includes at least one of a first buffer area and a second buffer area, a duty ratio of the first buffer area is 1, and a duty ratio of the second buffer area is greater than a duty ratio of the heat generating area.
Specifically, the second buffer area has a plurality of gaps therein, the gaps extend from one side of the edge of the graphite sheet base material to the center of the graphite sheet base material, and the extending direction of the gaps is perpendicular to the extending direction of the graphite sheet base material.
Specifically, the district includes a plurality of heating units, the heating unit includes end to end consecutive first portion, second portion, third portion and fourth portion, first portion with the third portion extends along first direction, the second portion with the fourth portion extends along the second direction, first direction with the second direction is crossing, the second direction is the direction that the graphite piece base member extends, first direction with the second direction is perpendicular.
Specifically, the maximum dimension of the first portion and the second portion in the first direction is greater than the maximum depth of the notch; at least one of the distances between the gaps is larger than the maximum size of the third portion and the fourth portion in the second direction, and the distance between the gaps is the distance between two adjacent gaps which are located on the same side edge in the gaps.
Specifically, the lengths of the first buffer zone and the second buffer zone are respectively and independently 5-30mm along the extending direction of the graphite sheet substrate.
Specifically, the length of the second buffer area is smaller than the length of the first buffer area.
Specifically, the heat generating sheet satisfies at least one of the following conditions: the two buffer areas at two ends of the graphite sheet substrate are both formed by the first buffer area or the second buffer area; the two buffer areas at two ends of the graphite sheet substrate respectively comprise one first buffer area and one second buffer area; one of the two buffer regions at both ends of the graphite sheet substrate is constituted by one of the first buffer regions, and the other is constituted by one of the second buffer regions.
On the other hand, the utility model provides a heating tube, which comprises the heating sheet; an outer tube in which the heat generating sheet is disposed; lead wire and connecting terminal, the piece that generates heat pass through the lead wire with connecting terminal links to each other. Therefore, the heating tube has all the characteristics and advantages of the heating sheet, and the description is omitted. Generally speaking, the heating tube has the advantages of high response speed, high heating efficiency, small impact current and the like of the graphite sheet heating tube.
In another aspect of the present invention, the present invention provides an electrical appliance, wherein the electrical appliance includes the heating tube. Thus, the appliance has all the features and advantages of the heating tube described above, which are not described in detail herein. Generally, the electric appliance has the advantages of good heating performance, good impact resistance and the like.
In particular, the electric appliance includes an electric oven, a microwave oven, or a steam oven.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic structural view of a heat generating sheet according to an embodiment of the present invention;
fig. 2 is a schematic view showing an assembly relationship of the heat generating tube according to an embodiment of the present invention;
fig. 3 is a schematic view showing the stress of the heating tube according to an embodiment of the present invention;
fig. 4 is a schematic view showing an internal force of a heat generating tube according to an embodiment of the present invention;
fig. 5 shows a schematic structural diagram of a heat generating unit according to an embodiment of the present invention;
fig. 6 is a schematic structural view of a heat generating sheet according to still another embodiment of the present invention;
fig. 7 is a schematic structural view of a heat generating sheet according to still another embodiment of the present invention;
fig. 8 shows a schematic structural diagram of a heat-generating tube according to an embodiment of the present invention.
Description of reference numerals:
100: a graphite sheet substrate; 110: a heat generating region; 120: a buffer area; 121: a first buffer area; 122: a second buffer area; 10: a heat generating unit; 11: a first part; 12: a second section; 13: a third section; 14: a fourth section; 200: an outer tube; 300: a lead wire; 400: a connection terminal; 1000: a heat pipe.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In an aspect of the utility model, the utility model provides a piece generates heat, the piece generates heat includes the graphite flake base member, refer to fig. 1, graphite flake base member 100 has the district 110 and the buffer 120 that generate heat, buffer 120 is located two tip of graphite flake base member 100, the district 110 that generates heat links to each other with buffer 120 and is located one side that buffer 120 kept away from the tip, the district 110 that generates heat has the fretwork region, the duty cycle of buffer 120 is greater than the duty cycle of the district 110 that generates heat. The graphite flake substrate as the heating flake substrate has high brittleness, and is easy to break when being impacted by external force. The buffer area is arranged on the graphite sheet substrate, so that the external impact on the graphite sheet substrate can be relieved, and the fracture of the heating sheet due to the external impact can be reduced.
For convenience of understanding, the following is a brief description of the principle by which the heat generating sheet can achieve the above beneficial effects:
taking an electric oven with a heating tube as an example, referring to fig. 2, during the assembly process of the heating tube 1000 into the electric oven, the heating tube 1000 is in rigid contact with the wall of the electric oven, i.e. the assembly relationship between the heating tube 1000 and the wall of the electric oven can be simplified into a fixed beam structure. Referring to fig. 3, the stress of the heating tube is analyzed, and the heating tube bears the load transferred from the wall surface of the oven when the electric oven falls, and the load can be considered to be uniformly distributed on the heating tube, so that the stress at any position on the heating tube, such as the position x away from the end of the heating tube, is:
wherein q is the load that the heating tube bears and comes from the oven wall to transmit in the electric oven falls the in-process, and l is the total length of heating tube. Referring to fig. 4, for both ends of the heat generating tube, it is stressed as follows during the falling process
For the middle position of the heating tube, i.e. the distance x from the two ends of the heating tube is
When the heating tube falls, the stress of the heating tube is 0. Referring to fig. 5, since the heat-generating sheet inside the heat-generating tube is pressed to form the bent heat-generating unit 10, the heat-generating efficiency of the heat-generating sheet is improved, i.e. the local area of the heat-generating sheet is narrow, such as the second portion 12 and the fourth portion 14, the stress area of the local area is small, and therefore the shear stress applied to the local area is large. As can be seen from the above internal force illustration, the shear stress applied to the two ends of the heating tube is relatively large, and the ultimate shear stress of the heating sheet material is easily reached, so that the heating sheet is broken. The utility model discloses in provide a piece that generates heat with buffering die mould structure, through the buffer structure who sets up the local area broad at piece both ends that generate heat to reduce the shear stress that the piece end structure that generates heat received, improve the shock resistance of the piece that generates heat, avoid the piece that generates heat in falling the in-process heating tube to break off, make the heating tube lose the performance that generates heat.
In the present application, since the heat-generating region has a hollow structure, it can be understood by those skilled in the art that a part of the graphite structure in the region is hollow and occupied by "blank". In the present application, the "duty ratio" is the ratio of the area occupied by the portion having the graphite sheet substrate in a certain region (e.g., the buffer region, the heat generating region) to the total area of the graphite sheet substrate in the portion (having the sum of the areas of the graphite portion and the hollow portion). That is, the more the cutout portion, the smaller the duty ratio. More specifically, the total area of the graphite sheet substrate in a certain region may be a region surrounded by a line connecting edges of the graphite sheet substrate extending in the second direction in the region.
According to some embodiments of the utility model, the buffer is used for improving the impact resistance, the anti fracture performance of piece that generates heat. The length of the buffer zone is not particularly limited, and for example, the length of the buffer zone may range from 5 to 60mm in the direction in which the graphite sheet substrate extends. When the length of the buffer area is less than 5mm, the length of the buffer area is too short, and the effect of improving the shock resistance of the heating sheet cannot be achieved. When the length of buffer is greater than 60mm, because of the duty cycle of buffer is higher, the graphite flake base member exists with the continuous form of great area more, consequently generates heat the performance relatively poor, when the length overlength of buffer, the whole performance of generating heat of piece is relatively poor, can't satisfy the daily operation requirement of heating tube.
According to some embodiments of the present invention, referring to fig. 1, the larger the duty cycle of the buffer, the better its impact resistance. For example, the duty cycle of the buffer region 120 may be 1, i.e., the graphite sheet matrix in this region is not processed by any profiling process and has no hollowed-out region. Therefore, the graphite sheet matrix in the area has better impact resistance, and is beneficial to reducing the damage to the heating sheet in the falling process.
According to some embodiments of the present invention, the structure of the heat generating sheet buffer is not particularly limited, and the buffer may include at least one of the first buffer and the second buffer. Specifically, referring to fig. 7, the duty ratio of the first buffer may be 1, and the duty ratio of the second buffer may be greater than the duty ratio of the heat generating region. Therefore, the first buffer area is free of the hollow structure, stress can be better buffered, meanwhile, the second buffer area is provided with a part of the hollow structure, the effect of buffering stress of the heating area can be achieved, meanwhile, the heating effect is good, and the heating performance of the heating tube can be improved.
According to some embodiments of the present invention, the distribution of the first buffer area and the second buffer area on the graphite sheet substrate is not particularly limited, for example, both buffer areas at both ends of the graphite sheet substrate may be composed of the first buffer area or both may be composed of the second buffer area, that is, both buffer areas at both ends of the graphite sheet substrate may be the first buffer area or the second buffer area at the same time; for example, one of the two buffer regions at both ends of the graphite sheet substrate may be constituted by a first buffer region and the other may be constituted by a second buffer region.
According to some embodiments of the present invention, referring to fig. 6, the buffer area 120 may be disposed at only one end of the heat generating area, for example, the buffer area 120 may only include the first buffer area 121, and may also only include the second buffer area 122. When the buffer area includes only the first buffer area or the second buffer area, the buffer area may be disposed only at one end of the heat generating area.
According to some embodiments of the present invention, referring to fig. 7, the buffer area 120 may include both the first buffer area 121 and the second buffer area 122. When the buffer area includes the first buffer area and the second buffer area, the buffer area may be disposed at only one end of the heat generating area, or may be disposed at both ends of the heat generating area. For example, when the first buffer area is first disposed at one end of the heat generating area, and then the second buffer area is disposed, or the second buffer area is first disposed, and then the first buffer area is disposed, the buffer area may not be disposed at the other end of the heat generating area, only the first buffer area may be disposed, only the second buffer area may be disposed, or both the first buffer area and the second buffer area may be disposed, and the order of disposing the first buffer area and the second buffer area is not particularly limited. The selection can be made by those skilled in the art according to the actual situation.
According to some embodiments of the present invention, the structure of the second buffer area is not particularly limited, for example, the second buffer area may have a plurality of openings therein, the openings extend from an edge of the graphite sheet substrate to the center of the graphite sheet substrate, and the direction in which the openings extend is perpendicular to the direction in which the graphite sheet substrate extends. When the second buffer area is of the structure, the local area of the second buffer area is wider than the heating area, so that a better buffer resistance effect can be achieved; the second buffer area is of a bent structure, so that the heating performance is better.
The heating area comprises a plurality of heating units which can be connected in series or in parallel, and the following description takes series connection as an example:
according to some embodiments of the present invention, referring to fig. 5, the structure of the heat generating unit 10 is not particularly limited, for example, the heat generating unit may include a first portion 11, a second portion 12, a third portion 13 and a fourth portion 14 connected end to end, the first portion 11 and the third portion 13 extend along a first direction, the second portion 12 and the fourth portion 14 extend along a second direction, the first direction and the second direction intersect, the second direction is a direction in which the graphite sheet substrate extends, and the first direction is perpendicular to the second direction. When the structure of the heating unit is the structure, the heating and heat dissipation of the heating sheet are facilitated, and the heating sheet has better heating performance.
According to some embodiments of the invention, the dimensions of the first, second, third and fourth portions are not particularly limited, e.g. the largest dimension of the first and second portions in the first direction may be greater than the largest depth of the gap; at least one of the gaps has the largest dimension in the second direction larger than that of the third portion and the fourth portion, and the distance between the gaps is the distance between two gaps which are positioned on the same side edge and are adjacently arranged in the gaps.
According to the utility model discloses a some embodiments, refer to fig. 7, the degree of depth of opening can be unanimous also can be inconsistent, and when the degree of depth of opening was inconsistent, the maximum dimension h1 of first portion and third portion on the first direction can be greater than the maximum depth h2 of opening, can guarantee from this that the duty cycle of buffer is greater than the duty cycle of the district that generates heat.
Similarly, referring to fig. 7, the widths of the gaps may be the same or different, the length of the second portion in the second direction may be the same as or different from the length of the fourth portion, and when the widths of the gaps are different, the length t1 of the second portion and the fourth portion in the second direction may be greater than the maximum width t2 of the gap, so that it may be ensured that the duty ratio of the buffer area is greater than the duty ratio of the heat generating area.
According to some embodiments of the present invention, when only the first buffer regions are disposed at both ends of the heat generating region, the length of the first buffer regions is not particularly limited, for example, the length of the first buffer regions may range from 5 to 60mm along the direction in which the graphite sheet substrate extends. When the length of first buffer is located above-mentioned length range, the buffer both can play better shock resistance, can reduce the influence of setting up of buffer to the piece performance that generates heat again.
According to some embodiments of the present invention, when only the second buffer area is disposed at both ends of the heat generating area, the length of the second buffer area is not particularly limited, for example, along the direction in which the graphite sheet substrate extends, the length of the second buffer area may range from 5 to 60 mm. When the length of second buffer is located above-mentioned length range, the buffer both can play better shock resistance, can reduce the influence of setting up of buffer to the piece performance that generates heat again.
According to some embodiments of the present invention, when the first buffer area and the second buffer area are simultaneously disposed at both ends of the heat generating area, the lengths of the first buffer area and the second buffer area are not particularly limited, for example, along the direction in which the graphite sheet substrate extends, the length ranges of the first buffer area and the second buffer area may be respectively and independently 5 to 30 mm. Specifically, the length of the first buffer region may be 20mm, and the length of the second buffer region may be 15 nm. When the length of first buffer and the length of second buffer were located above-mentioned length range, the buffer both can play better shock resistance, can reduce the influence of setting up of buffer to the piece performance that generates heat again.
According to some embodiments of the present invention, the size relationship between the length of the first buffer area and the length of the second buffer area is not particularly limited, for example, the length of the second buffer area may be smaller than the length of the first buffer area. Thus, the impact resistance of the heat generating sheet can be further improved.
In another aspect of the present invention, referring to fig. 8, the present invention provides a heating tube 1000, wherein the heating tube 1000 includes the above-mentioned heating sheet 100; an outer tube 200 in which the heat generating sheet 100 is disposed; a lead 300 and a connection terminal 400, and the heat generating sheet 100 is connected to the connection terminal 400 through the lead 300. Therefore, the heating tube has all the characteristics and advantages of the heating sheet, and the description is omitted. Generally speaking, the heating tube has the advantages of high response speed, high heating efficiency, small impact current and the like of the graphite sheet heating tube.
In another aspect of the present invention, the present invention provides an electrical appliance, wherein the electrical appliance includes the above-mentioned heating tube. Therefore, the electric appliance has all the characteristics and advantages of the heating tube, and the description is omitted. Generally, the electric appliance has the advantages of good heating performance, good impact resistance and the like.
According to some embodiments of the present invention, the kind of the electric appliance is not particularly limited, for example, the electric appliance may be an electric oven, a microwave oven, or a steam oven.
In the description of the present invention, the terms "upper", "lower", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description of the present invention, but do not require the present invention to be constructed and operated in a specific orientation, and thus, cannot be construed as limiting the present invention.
Reference throughout this specification to the description of "one embodiment," "another embodiment," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. In addition, it should be noted that the terms "first" and "second" in this specification are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (11)
1. A heat generating sheet, characterized by comprising:
the graphite sheet base body, the graphite sheet base body has district and the buffer zone of generating heat, the buffer zone is located two tip of graphite sheet base body, generate heat the district with the buffer zone links to each other and is located the buffer zone is kept away from one side of tip, the district that generates heat has the fretwork region, the duty cycle of buffer zone is greater than the duty cycle in the district that generates heat.
2. The heat generating sheet according to claim 1, wherein the length of the buffer region is 5 to 60mm in a direction in which the graphite sheet substrate extends.
3. The heat generating sheet according to claim 2, wherein the buffer area includes at least one of a first buffer area and a second buffer area,
the duty cycle of the first buffer is 1,
the duty ratio of the second buffer area is larger than that of the heating area.
4. The heat generating sheet according to claim 3, wherein the second buffer area has a plurality of slits extending from an edge of the graphite sheet base material to a center of the graphite sheet base material, and the direction in which the slits extend is perpendicular to the direction in which the graphite sheet base material extends.
5. The heat generating sheet according to claim 4, wherein the heat generating region includes a plurality of heat generating units, each of the heat generating units includes a first portion, a second portion, a third portion, and a fourth portion connected end to end, the first portion and the third portion extend in a first direction, the second portion and the fourth portion extend in a second direction, the first direction and the second direction intersect, the second direction is a direction in which the graphite sheet substrate extends, and the first direction is perpendicular to the second direction.
6. The heat generating sheet according to claim 5, wherein a maximum dimension of the first and second portions in the first direction is larger than a maximum depth of the notch;
at least one of the distances between the gaps is larger than the maximum size of the third portion and the fourth portion in the second direction, and the distance between the gaps is the distance between two adjacent gaps which are located on the same side edge in the gaps.
7. The heat generating sheet according to claim 3, wherein the lengths of the first buffer area and the second buffer area are each independently 5 to 30mm in the direction in which the graphite sheet substrate extends;
optionally, the length of the second buffer is less than the length of the first buffer.
8. The heat generating sheet according to claim 3, wherein the heat generating sheet satisfies at least one of the following conditions:
the two buffer areas at two ends of the graphite sheet substrate are both formed by the first buffer area or the second buffer area;
the two buffer areas at two ends of the graphite sheet substrate respectively comprise one first buffer area and one second buffer area;
one of the two buffer regions at both ends of the graphite sheet substrate is constituted by one of the first buffer regions, and the other is constituted by one of the second buffer regions.
9. A heat generating tube, comprising:
a heat generating sheet as set forth in any one of claims 1 to 8;
an outer tube in which the heat generating sheet is disposed;
lead wire and connecting terminal, the piece that generates heat pass through the lead wire with connecting terminal links to each other.
10. An electric appliance characterized by comprising the heat generating tube according to claim 9.
11. The appliance according to claim 10, characterized in that the appliance comprises an electric oven, a microwave oven or a steam oven.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022484974.5U CN213754997U (en) | 2020-10-30 | 2020-10-30 | Heating sheet, heating tube and electric appliance |
| PCT/CN2021/124473 WO2022089242A1 (en) | 2020-10-30 | 2021-10-18 | Heating sheet, heating tube and electrical appliance |
| US17/928,620 US20230276540A1 (en) | 2020-10-30 | 2021-10-18 | Heating sheet, heating tube, and electric appliance |
| JP2022573774A JP2023537560A (en) | 2020-10-30 | 2021-10-18 | Heating sheets, heat generating tubes and electrical appliances |
| EP21884970.1A EP4145955A4 (en) | 2020-10-30 | 2021-10-18 | Heating sheet, heating tube and electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022484974.5U CN213754997U (en) | 2020-10-30 | 2020-10-30 | Heating sheet, heating tube and electric appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213754997U true CN213754997U (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022484974.5U Active CN213754997U (en) | 2020-10-30 | 2020-10-30 | Heating sheet, heating tube and electric appliance |
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| Country | Link |
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| CN (1) | CN213754997U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112188655A (en) * | 2020-10-30 | 2021-01-05 | 广东美的厨房电器制造有限公司 | Heating sheet, heating tube and electric appliance |
| WO2022089242A1 (en) * | 2020-10-30 | 2022-05-05 | 广东美的厨房电器制造有限公司 | Heating sheet, heating tube and electrical appliance |
-
2020
- 2020-10-30 CN CN202022484974.5U patent/CN213754997U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112188655A (en) * | 2020-10-30 | 2021-01-05 | 广东美的厨房电器制造有限公司 | Heating sheet, heating tube and electric appliance |
| WO2022089242A1 (en) * | 2020-10-30 | 2022-05-05 | 广东美的厨房电器制造有限公司 | Heating sheet, heating tube and electrical appliance |
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