Heating tube and heating device
By setting a limiting support inside the glass tube to restrict the deformation of the heating element, the problem of uneven heating caused by bending deformation in the middle of the heating element is solved, thus achieving uniform and efficient heating of the heating tube.
Patent Information
- Application Number
- CN202423128583.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-17
AI Technical Summary
In existing heating elements, the heating element in the middle is bent and deformed due to gravity, resulting in uneven heating and reduced heating efficiency and uniformity.
An inwardly protruding limiting support is provided inside the glass tube to limit the deformation of the middle part of the heating element in the radial and width directions. The limiting support abuts against the heating element to ensure that the heating element is basically kept on the center line of the heating tube.
This improves the heating uniformity and efficiency of the heating element, reduces direct heat transfer between the heating element and the glass tube, and enhances the heating effect of the heating device.
Smart Images
Figure CN223553485U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heating device technology, and in particular to a heating tube and a heating device. Background Technology
[0002] Heating elements are commonly used heating devices. A heating element consists of a glass tube with an electric heating element inside. Heating elements are widely used in various applications, such as household barbecue grills, heating equipment, disinfection cabinets, food ovens, and other heating devices.
[0003] However, in existing heating elements, since the heating element is only supported at both ends by end seats within the glass tube, the middle part of some heating elements may bend and deform downwards due to gravity. This causes the following problems: First, if the deformed heating element comes into contact with the glass tube, the heat from the heating element will be directly transferred to the glass tube at the point of contact, resulting in uneven heating. Second, in heating devices, designs that originally aimed for high heating efficiency and uniformity by using the axis of the heating element as the heating position, such as the position of the heated item and the angle of the heat reflector, will deviate from the centerline of the heating element after deformation. This will cause the actual heating position to deviate from the designed heating position, reducing the heating efficiency and uniformity of the heating device and affecting the heating effect. Utility Model Content
[0004] The main purpose of this invention is to provide a heating element and a heating device that solves the technical problem in the prior art where the heating element bends and deforms downward in the middle, resulting in uneven heating and reduced heating efficiency.
[0005] To achieve the above objectives, this utility model proposes a heating tube, comprising a glass tube, a heating element, and two end seats. The two end seats are respectively fixed to both ends of the glass tube, and both ends of the heating element are respectively fixedly connected to the two end seats. The inner side of the glass tube is provided with an inwardly protruding limiting support portion, which abuts against the heating element. The limiting support portion can limit the deformation of the middle part of the heating element in at least one radial direction of the glass tube.
[0006] By providing an inwardly protruding limiting support on the inner side of the glass tube, the limiting support can abut against the heating element, thus restricting the middle part of the heating element in at least one radial direction of the glass tube. When installing the heating tube, the heating tube is rotated so that the limiting support is positioned to restrict the downward deformation of the heating element, and the middle part of the heating element is supported on the limiting support. This reduces the deformation of the heating element, reduces direct contact between the heating element and the glass tube for heat transfer, and keeps the heating element basically in the centerline of the heating tube, thereby improving the heating uniformity and heating efficiency of the heating tube.
[0007] Preferably, two of the limiting support portions constitute a limiting group, and the two limiting support portions in a limiting group are arranged at intervals in the width direction of the heating element. The heating element is at least partially disposed between the two limiting support portions in the limiting group, and the two limiting support portions in the limiting group can restrict the deformation of the heating element in the width direction.
[0008] The heating element is at least partially disposed between two limiting supports, which can limit the deformation of the heating element in the width direction.
[0009] Preferably, the limiting support includes a first support strip and a second support strip. The first support strip and the second support strip both protrude toward the inside of the glass tube and are arranged facing each other. The first support strip and the second support strip are respectively disposed on both sides of the heating element in the thickness direction. The first support strip and / or the second support strip abut against the heating element. The first support strip and the second support strip can limit the deformation of the heating element in the thickness direction.
[0010] The first and second support bars restrict the deformation of the heating element in the thickness direction on both sides of the heating element.
[0011] Preferably, the first support bar has a tapered first conical end at its end, and the second support bar has a tapered second conical end at its end, and the distance between the first conical end and the second conical end is less than the thickness of the heating element;
[0012] The sides of the first cone end and the sides of the second cone end together form a recessed limiting space. The edge portion of the heating element is disposed within the limiting space. The limiting space can restrict the deformation of the heating element in the thickness direction and can restrict the deformation of the heating element in the width direction towards the side close to the first support bar and the second support bar.
[0013] The ends of the first and second support bars avoid the heating element to prevent direct pressure on the heating element during processing. The sides of the first and second cone ends together form a recessed limiting space. The edge of the heating element is located within the limiting space to restrict deformation in the thickness direction, and the heating element cannot pass between the first and second cone ends, thus restricting the heating element from deforming towards the side of the first and second support bars in the width direction.
[0014] Preferably, the heating element has an opening, and the limiting support is inserted into the opening. The limiting support is matched with the opening, and the limiting support can restrict the deformation of the heating element in the width direction.
[0015] Preferably, there are multiple limiting support portions, which are arranged at intervals along the length of the glass tube. These multiple limiting support portions can support the heating element at multiple positions along its length, further reducing deformation of the heating element.
[0016] Preferably, the heating element extends in a serpentine shape in the middle.
[0017] Preferably, the heating element is a graphite heating element.
[0018] In another aspect, this invention also provides a heating device having the aforementioned heating element. By employing the aforementioned heating element, the uniformity and efficiency of heating in the heating device can be improved. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the overall structure of the heating element of this utility model;
[0021] Figure 2 This is a three-dimensional structural diagram of the limiting support part of this utility model supporting the heating element;
[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the limiting support part of this utility model when supporting the heating element;
[0023] Figure 4 This is a schematic diagram of the first structure of the heating element of this utility model, and the limiting support part in different positions;
[0024] Figure 5 This is a schematic diagram of the second structure of the heating element of this utility model, and the limiting support part is in different positions.
[0025] Figure 6 This is a schematic diagram of the second structure of the heating element and another limiting support part of this utility model;
[0026] Figure 7 This is a schematic diagram of the second structure of the heating element and another cross-sectional structure of the limiting support part of this utility model.
[0027] In the attached diagram: 1-glass tube, 11-limiting support part, 111-first support bar, 1111-first conical end, 112-second support bar, 1121-second conical end, 12-limiting space, 2-heating element, 21-opening, 3-end seat.
[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0030] It should be noted that if the embodiments of this utility model involve directional indicators, such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0032] like Figures 1 to 7 As shown, a heating element includes a glass tube 1, a heating element 2, and two end seats 3. The two end seats 3 are respectively fixed to both ends of the glass tube 1. The two ends of the heating element 2 are respectively fixedly connected to the two end seats 3. The inner side of the glass tube 1 is provided with an inwardly protruding limiting support part 11. The limiting support part 11 abuts against the heating element 2. The limiting support part 11 can limit the deformation of the middle part of the heating element 2 in at least one radial direction of the glass tube 1.
[0033] By providing an inwardly protruding limiting support 11 on the inner side of the glass tube 1, the limiting support 11 can abut against the heating element 2, so that the middle part of the heating element 2 can be restricted in at least one radial direction of the glass tube 1.
[0034] When installing the heating element, rotate the heating element so that the limiting support part 11 is positioned to limit the downward deformation of the heating element 2, and fix the heating element. The middle part of the heating element 2 is supported on the limiting support part 11. This can reduce the deformation of the heating element 2 and reduce the direct contact between the heating element 2 and the glass tube 1 for heat transfer. Although the heating element 2 is in contact with the limiting support part 11, the contact area with the glass tube 1 is much smaller than when the heating element 2 is bent and deformed. Moreover, it keeps the heating element 2 basically in the center line of the heating element, thereby improving the heating uniformity and heating efficiency of the heating element.
[0035] The connection structure between the glass tube 1, the heating element 2, and the end seat 3 is existing technology and will not be described in detail here. The limiting support part 11 is formed by heating the glass tube 1 and softening it, inserting an object into the glass tube 1 from the outside to the inside, and cooling it after it is in place. In this way, the limiting support part 11 protruding inward is formed on the inner side of the glass tube 1. The limiting support part 11 does not penetrate through the inner and outer sides of the glass tube 1.
[0036] In some specific embodiments, the heating element 2 is a graphite heating element. Graphite heating elements, also known as graphene heating elements or carbon heating elements, have good thermal conductivity and thermal stability.
[0037] In some specific embodiments, the heating element 2 extends in a serpentine shape in the middle, as shown in the reference. Figure 4 This allows for increasing the total length of the heating element 2 while maintaining a fixed length for the glass tube 1, thereby increasing heat generation. In other embodiments, the heating element 2 can be a single, flat sheet, or it can have multiple openings 21 on the entire sheet, as shown in the reference. Figure 5 and Figure 6 .
[0038] In some specific embodiments, two limiting support parts 11 are used as a limiting group. The two limiting support parts 11 in a limiting group are arranged at intervals in the width direction of the heating element 2. The heating element 2 is at least partially disposed between the two limiting support parts 11 in the limiting group. The two limiting support parts 11 in the limiting group can limit the deformation of the heating element 2 in the width direction.
[0039] The heating element 2 is at least partially disposed between two limiting supports 11, which restrict the deformation of the heating element 2 in the width direction. When installing the heating tube, the two limiting supports 11 in one limiting group can be arranged vertically. (Refer to...) Figure 4 (a), (b) and (c) in the text, and Figure 5 In the diagram, (d), (e), and (f) represent different positions of the two limit support parts 11 in a limit group. Figure 4The heating element 2 extends in a serpentine shape. The two limiting support parts 11 in a limiting group can be set at the positions of the three embodiments (a), (b) and (c) or other positions with the same function. They can be set in the inner groove of the serpentine arrangement or on the outer side of the heating element 2 as a whole. Figure 5 The heating element 2 is provided with an opening 21. The two limiting support parts 11 in a limiting group can be set at the positions of the three embodiments (d), (e) and (f) or other positions with the same function. They can be set inside the opening 21 or on the outside of the heating element 2 as a whole, and can all play the role of limiting the deformation of the heating element 2 in the width direction.
[0040] In some specific embodiments, reference is made to Figure 2 and Figure 3 The limiting support part 11 includes a first support strip 111 and a second support strip 112. The first support strip 111 and the second support strip 112 both protrude towards the inside of the glass tube 1 and are arranged facing each other. The first support strip 111 and the second support strip 112 are respectively located on both sides of the heating element 2 in the thickness direction. The first support strip 111 and / or the second support strip 112 abut against the heating element 2. The first support strip 111 and the second support strip 112 can limit the deformation of the heating element 2 in the thickness direction.
[0041] The first support strip 111 and the second support strip 112 restrict the deformation of the heating element 2 in the thickness direction on both sides of the heating element 2. In some embodiments, the distance between the end of the first support strip 111 and the end of the second support strip 112 is greater than or equal to the thickness of the heating element 2, and the first support strip 111 and the second support strip 112 can abut against two surfaces of the heating element 2.
[0042] In other embodiments, reference is made to Figure 3 The first support bar 111 has a tapered first cone end 1111 at its end, and the second support bar 112 has a tapered second cone end 1121 at its end. The distance between the first cone end 1111 and the second cone end 1121 is less than the thickness of the heating element 2. The side of the first cone end 1111 and the side of the second cone end 1121 together form a recessed limiting space 12. The edge portion of the heating element 2 is located in the limiting space 12. The limiting space 12 can restrict the deformation of the heating element 2 in the thickness direction and can restrict the deformation of the heating element 2 in the width direction towards the side close to the first support bar 111 and the second support bar 112.
[0043] The ends of the first support bar 111 and the second support bar 112 avoid the heating element 2, as shown in the reference. Figure 4 and Figure 5To avoid directly pressing the heating element 2 during processing, the diameters of the first conical end 1111 and the second conical end 1121 gradually decrease, so that the sides of the first conical end 1111 and the sides of the second conical end 1121 together form a recessed limiting space 12. The edge portion of the heating element 2 is located within the limiting space 12, restricting its deformation in the thickness direction. (Refer to...) Figure 3 Furthermore, the heating element 2 cannot pass between the first conical end 1111 and the second conical end 1121, thus restricting the heating element 2 from deforming in the width direction toward the side closer to the first support bar 111 and the second support bar 112.
[0044] When the heating element 2 is made of graphite, the material of the graphite heating element 2 is relatively brittle. If the first support strip 111 and the second support strip 112 directly abut against the heating element 2 during processing, the heating element 2 is easily crushed. Therefore, the ends of the first support strip 111 and the second support strip 112 are set to avoid the heating element 2 to prevent the heating element 2 from being crushed.
[0045] In addition, by combining the two limiting support parts 11 of a limiting group, the width and thickness directions of the heating element 2 are both limited. When installing the heating element, the limiting support parts 11 do not need to be considered. The heating element can be installed at different rotation angles, which improves the ease of installation.
[0046] In some specific embodiments, reference is made to Figure 6 and Figure 7 The heating element 2 has an opening 21, and a limiting support 11 passes through the opening 21. The limiting support 11 is matched with the opening 21, and the limiting support 11 can limit the deformation of the heating element 2 in the width direction. During installation, the limiting support 11 can be arranged laterally, or when the limiting support 11 has a taper, the limiting support 11 can be arranged on the lower side.
[0047] In some specific embodiments, there are multiple limiting support portions 11, which are arranged at intervals along the length direction of the glass tube 1. The multiple limiting support portions 11 can support the heating element 2 at multiple positions along the length direction of the heating element 2, further reducing the deformation of the heating element 2.
[0048] On the other hand, a heating device having the aforementioned heating element, by employing the aforementioned heating element and positioning the limiting support 11 at a position that restricts the downward deformation of the heating element 2 during installation, can improve the uniformity and efficiency of heating. The heating device can be a household barbecue grill, electric oven, heater, or disinfection cabinet, etc.
[0049] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A heating element, characterized in that, The device includes a glass tube (1), a heating element (2), and two end seats (3). The two end seats (3) are fixed to both ends of the glass tube (1), and both ends of the heating element (2) are fixedly connected to the two end seats (3). The inner side of the glass tube (1) is provided with an inwardly protruding limiting support part (11), which abuts against the heating element (2). The limiting support part (11) can limit the deformation of the middle part of the heating element (2) in at least one radial direction of the glass tube (1).
2. The heating element as described in claim 1, characterized in that, Two of the limiting support parts (11) form a limiting group. The two limiting support parts (11) in a limiting group are arranged at intervals in the width direction of the heating element (2). The heating element (2) is at least partially disposed between the two limiting support parts (11) in the limiting group. The two limiting support parts (11) in the limiting group can restrict the deformation of the heating element (2) in the width direction.
3. The heating element as described in claim 1, characterized in that, The limiting support part (11) includes a first support strip (111) and a second support strip (112). The first support strip (111) and the second support strip (112) both protrude toward the inside of the glass tube (1) and are arranged facing each other. The first support strip (111) and the second support strip (112) are respectively disposed on both sides of the heating element (2) in the thickness direction. The first support strip (111) and / or the second support strip (112) abut against the heating element (2). The first support strip (111) and the second support strip (112) can limit the deformation of the heating element (2) in the thickness direction.
4. The heating element as described in claim 3, characterized in that, The first support bar (111) has a tapered first cone end (1111) at its end, and the second support bar (112) has a tapered second cone end (1121) at its end. The distance between the first cone end (1111) and the second cone end (1121) is less than the thickness of the heating element (2). The side of the first conical end (1111) and the side of the second conical end (1121) together form a recessed limiting space (12). The edge portion of the heating element (2) is located in the limiting space (12). The limiting space (12) can restrict the deformation of the heating element (2) in the thickness direction and can restrict the deformation of the heating element (2) in the width direction towards the side close to the first support bar (111) and the second support bar (112).
5. The heating element as described in claim 1, characterized in that, The heating element (2) has an opening (21), and the limiting support part (11) passes through the opening (21). The limiting support part (11) is matched with the opening (21), and the limiting support part (11) can limit the deformation of the heating element (2) in the width direction.
6. The heating element as described in claim 1, characterized in that, The number of the limiting support parts (11) is multiple, and the multiple limiting support parts (11) are arranged at intervals along the length direction of the glass tube (1).
7. The heating element as described in claim 1, characterized in that, The heating element (2) is arranged in a serpentine shape in the middle.
8. The heating element according to any one of claims 1 to 7, characterized in that, The heating element (2) is a graphite heating element.
9. A heating device, characterized in that, Including the heating element as described in any one of claims 1 to 8.