PTC heater for electric heaters

Abstract

This utility model discloses a PTC heater for electric heaters, including a heating element, a corrugated heat dissipation aluminum sheet, and an electrode plate. Conductive plates are provided on both the left and right sides of the heating element. The surface of the conductive plate facing away from the heating element has a snap-fit ​​part and a snap-fit ​​groove. The conductive plates on the left and right sides of the same heating element, or adjacent conductive plates on adjacent heating elements, are interlocked through the snap-fit ​​part and the snap-fit ​​groove of the adjacent conductive plate to achieve the butt joint assembly of the conductive plates. The corrugated heat dissipation aluminum sheet is wavy, and its upper and lower end faces are coated with a conductive layer. The conductive layer contacts the outer side of the conductive plate to conduct current and enhance heat dissipation. Thus, by providing snap-fit ​​parts and snap-fit ​​grooves on the surface of the conductive plate facing away from the heating element, the conductive plates on both sides of the same heating element or between adjacent heating elements can be interlocked and assembled. This allows for quick assembly and disassembly of the conductive plates, and in later maintenance, damaged parts can be accurately replaced, significantly reducing maintenance costs and time.

Description

Technical Field

[0001] This utility model relates to the field of electric heaters, and in particular to a PTC heater for electric heaters. Background Technology

[0002] The plate heating element in an electric heater is one type of heating element. When the heating element in the plate heating element of an electric heater is powered on, it generates heat, which is conducted to the heat pipe. The heat pipe then conducts the heat to the heat radiation plate connected to it, and the heat radiation plate dissipates the heat, thereby heating the air.

[0003] Existing PTC heating elements are mostly used in electric heaters, air conditioners, hot air curtains, dehumidifiers, dryers, clothes dryers, warm air blowers, bathroom heaters, automobiles and other equipment that require warm air;

[0004] In the field of electric heaters, PTC heaters are widely used due to their advantages such as automatic temperature control and safety and reliability. However, existing PTC heaters still have many shortcomings in structural design and functional implementation. The conductive plates of traditional PTC heaters are mostly connected to the heating elements by welding or bolting. This connection method not only leads to low assembly efficiency and makes it difficult to meet the needs of automated production lines, but also requires complete disassembly and replacement if the conductive plate or heating element is damaged during later maintenance. This results in high maintenance costs and cumbersome operation. At the same time, conventional heat sink aluminum fins only have a single heat dissipation function and cannot participate in electrical conduction, making the internal conductive circuit layout of the heater complex and increasing production costs and assembly difficulty.

[0005] Therefore, a new technical solution needs to be researched to address the above problems. Utility Model Content

[0006] In view of this, the present invention addresses the deficiencies of the existing technology and its main objective is to provide a PTC heater for electric heaters. By setting a snap-fit ​​part and a snap-fit ​​groove on the surface of the conductive plate facing away from the heating element, the conductive plates on both sides of the same heating element or between adjacent heating elements can be plugged and assembled. Compared with traditional welding or bolt connections, this structure does not require welding or tool assistance and can achieve rapid disassembly and assembly of the conductive plate. It is not only compatible with automated production lines, greatly improving production efficiency, but also allows for precise replacement of damaged parts during later maintenance, significantly reducing maintenance costs and time costs.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A PTC heater for electric heaters includes a heating element, corrugated heat dissipation aluminum fins, and electrode plates;

[0009] The heating element has conductive plates that can be assembled and mated on both its left and right sides; the surface of the conductive plate facing the heating element is tightly fitted with the corresponding side of the heating element to conduct electricity; the surface of the conductive plate facing away from the heating element is provided with a snap-fit ​​part and a snap-fit ​​groove. The conductive plates on the left and right sides of the same heating element or the adjacent conductive plates on adjacent heating elements are connected and mated with each other through the snap-fit ​​part and the snap-fit ​​groove of the adjacent conductive plate to realize the docking and assembly of the conductive plates.

[0010] The corrugated heat dissipation aluminum sheet is wavy, and its upper and lower end faces are coated with a conductive layer. The conductive layer is in contact with the outside of the conductive plate to conduct current and enhance heat dissipation.

[0011] The front and rear sides of the heating element are coated with a temperature-sensitive color-changing layer, which changes from green to red when the temperature exceeds a set threshold.

[0012] As a preferred embodiment, a mating groove is also provided on the side of the snap-fit ​​part, and a mating part adapted to the mating groove is also provided on the side of the snap-fit ​​groove of the adjacent conductive plate, so that when the adjacent conductive plates are assembled together, the mating part is adapted to the mating groove, and the double locking structure is used to ensure the connection stability between the adjacent conductive plates.

[0013] As a preferred embodiment, the PTC heater for the electric heater further includes an insulating mounting shell, which includes a first ceramic substrate and a second ceramic substrate. The first ceramic substrate and the second ceramic substrate are connected to form a mounting position, and the heating element, corrugated heat dissipation aluminum fins, electrode plate and conductive plate are located within the mounting position.

[0014] As a preferred embodiment, at least a portion of the conductive plate is exposed outside the insulating mounting housing, wherein a terminal block is connected to the exposed portion of the conductive plate, and a connecting wire is connected to the terminal block.

[0015] As a preferred embodiment, the corrugated heat sink aluminum sheet has multiple peaks, and a conductive layer is coated on the top surface of each peak. In the assembled state, the conductive layer maintains electrical contact with the surface of the adjacent conductive plate facing away from the heat-generating element, so that current can be conducted between adjacent heat-generating elements through the conductive plate and the conductive layer, thereby enhancing the heat dissipation area and efficiency.

[0016] As a preferred embodiment, the conductive layer is a conductive coating.

[0017] As a preferred embodiment, the conductive coating is silver paste.

[0018] As a preferred embodiment, the conductive plate is made of aluminum.

[0019] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly achieves the plug-in assembly of conductive plates on both sides of the same heating element or between adjacent heating elements by setting a snap-fit ​​part and snap-fit ​​groove on the surface of the conductive plate facing away from the heating element. Compared with traditional welding or bolt connection, this structure does not require welding or tool assistance, and can realize the rapid assembly and disassembly of the conductive plate. It is not only compatible with automated production lines and greatly improves production efficiency, but also allows for precise replacement of damaged parts during later maintenance, significantly reducing maintenance costs and time costs.

[0020] Secondly, a conductive layer is coated on the upper and lower surfaces of the corrugated aluminum heat sink, giving it both conductive and heat dissipation functions. The conductive layer contacts the outer side of the conductive plate, which not only simplifies the circuit layout and reduces the need for additional conductive lines, but also allows the heat generated during current conduction to be quickly dissipated through the corrugated structure, enhancing the heat dissipation effect and improving the overall working efficiency and stability of the PTC heater.

[0021] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of an embodiment of the present utility model;

[0023] Figure 2 This is a structural diagram of an embodiment of the present utility model;

[0024] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0025] Figure 4 This is another structural diagram of an embodiment of the present invention (multiple sets of conductive plates spliced ​​together).

[0026] Explanation of reference numerals in the attached diagram:

[0027] 1. Heating element

[0028] 2. Corrugated aluminum heat sink 21. Conductive layer

[0029] 3. Electrode plates

[0030] 4. Conductive plate 41, snap-fit ​​part

[0031] 42. Snap-fit ​​slot 43. Connecting slot

[0032] 44. Docking section

[0033] 5. Insulating mounting shell 51. First ceramic substrate

[0034] 52. Second ceramic substrate 53. Mounting position

[0035] 6. Terminal block 7. Connecting wires Detailed Implementation

[0036] Please refer to Figures 1 to 4 As shown, it illustrates the specific structure of an embodiment of the present invention.

[0037] In the description of this utility model, it should be noted that the directional terms such as "up", "down", "front", "back", "left", and "right" indicate the orientation and positional relationship based on the accompanying drawings or the orientation or positional relationship shown when wearing and using the device normally. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0038] A PTC heater for electric heaters includes a heating element 1, a corrugated heat dissipation aluminum sheet 2, and an electrode plate 3.

[0039] The heating element 1 has conductive plates 4 that can be assembled and matched on both its left and right sides; the surface of the conductive plate 4 facing the heating element 1 is tightly attached to the corresponding side of the heating element 1 to conduct electricity.

[0040] The conductive plate 4 has a snap-fit ​​part 41 and a snap-fit ​​groove 42 on its surface facing away from the heating element 1. The conductive plates 4 on the left and right sides of the same heating element 1, or adjacent conductive plates 4 on adjacent heating elements 1, are connected by the snap-fit ​​part 41 and the snap-fit ​​groove 42 of the adjacent conductive plate 4 to achieve the butt-fitting assembly of the conductive plates 4. In this embodiment, as shown... Figure 1 As shown, it has two sets of conductive plates 4, and the two sets of conductive plates 4 are detachably connected by a snap-fit ​​part 41 and a snap-fit ​​groove 42. The appropriate number of conductive plates 4 and heating elements 1 can be selected according to actual needs.

[0041] Preferably, a mating groove 43 is provided on the side of the snap-fit ​​part 41, and a mating part 44 adapted to the mating groove 43 is provided on the side of the snap-fit ​​groove 42 of the adjacent conductive plate 4, so that when the adjacent conductive plates 4 are assembled together, the mating part 44 is adapted to the mating groove 43, and the double locking structure is used to ensure the connection stability between the adjacent conductive plates 4.

[0042] The corrugated heat dissipation aluminum sheet 2 is wavy, and its upper and lower end faces are coated with a conductive layer 21. The conductive layer 21 is in contact with the outer side of the conductive plate 4 to conduct current and enhance heat dissipation; preferably, the conductive layer 21 is a conductive coating. Preferably, the conductive coating is silver paste.

[0043] The heating element 1 has a temperature-sensitive color-changing layer coated on both its front and rear surfaces. The temperature-sensitive color-changing layer changes from green to red when the temperature exceeds a set threshold. When the surface temperature of the heating element 1 exceeds a preset safety threshold (e.g., 60℃-80℃), its color undergoes an irreversible or reversible significant change (e.g., from green to red), providing an intuitive visual warning of excessive temperature.

[0044] Preferably, the PTC heater for the electric heater further includes an insulating mounting shell 5. The insulating mounting shell includes a first ceramic substrate 51 and a second ceramic substrate 52. The first ceramic substrate 51 and the second ceramic substrate 52 are connected to form a mounting position 53. The heating element 1, the corrugated heat dissipation aluminum fin 2, the electrode plate 3, and the conductive plate 4 are located within the mounting position 53. The first ceramic substrate 51 and the second ceramic substrate 52 can be connected by a snap-fit ​​structure, with a snap-fit ​​part on one side and a snap-fit ​​groove on the other. The snap-fit ​​part and the snap-fit ​​groove form a detachable connection.

[0045] Preferably, at least a portion of the conductive plate 4 is exposed outside the insulating mounting housing 5, wherein a terminal block 6 is connected to the exposed portion of the conductive plate 4, and a connecting wire 7 is connected to the terminal block 6. Preferably, the conductive plate 4 is made of aluminum.

[0046] Preferably, the corrugated heat dissipation aluminum sheet 2 has multiple peaks, and a conductive layer 21 is coated on the top surface of the peaks. In the assembled state, the conductive layer 21 maintains electrical contact with the surface of the adjacent conductive plate 4 facing away from the heating element 1, so that the current can be conducted between the adjacent heating elements 1 through the conductive plate 4 and the conductive layer 21, thereby enhancing the heat dissipation area and efficiency.

[0047] The key design feature of this invention is that by setting a snap-fit ​​part and a snap-fit ​​groove on the surface of the conductive plate facing away from the heating element, the conductive plates on both sides of the same heating element or between adjacent heating elements can be plugged and assembled. Compared with traditional welding or bolt connection, this structure does not require welding or tool assistance, and can realize the rapid assembly and disassembly of the conductive plate. It is not only compatible with automated production lines, which greatly improves production efficiency, but also allows for precise replacement of damaged parts during later maintenance, which significantly reduces maintenance costs and time costs.

[0048] Secondly, a conductive layer is coated on the upper and lower surfaces of the corrugated aluminum heat sink, giving it both conductive and heat dissipation functions. The conductive layer contacts the outer side of the conductive plate, which not only simplifies the circuit layout and reduces the need for additional conductive lines, but also allows the heat generated during current conduction to be quickly dissipated through the corrugated structure, enhancing the heat dissipation effect and improving the overall working efficiency and stability of the PTC heater.

[0049] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A PTC heater for an electric heater, comprising a heating element, corrugated aluminum heat dissipation fins, and electrode plates; characterized in that: The heating element has conductive plates that can be assembled and mated on both its left and right sides; the surface of the conductive plate facing the heating element is tightly fitted with the corresponding side of the heating element to conduct electricity; the surface of the conductive plate facing away from the heating element is provided with a snap-fit ​​part and a snap-fit ​​groove. The conductive plates on the left and right sides of the same heating element or the adjacent conductive plates on adjacent heating elements are connected and mated with each other through the snap-fit ​​part and the snap-fit ​​groove of the adjacent conductive plate to realize the docking and assembly of the conductive plates. The corrugated heat dissipation aluminum sheet is wavy, and its upper and lower end faces are coated with a conductive layer. The conductive layer is in contact with the outside of the conductive plate to conduct current and enhance heat dissipation. The front and rear sides of the heating element are coated with a temperature-sensitive color-changing layer, which changes from green to red when the temperature exceeds a set threshold.

2. The PTC heater for an electric heater according to claim 1, characterized in that: A mating groove is also provided on the side of the snap-fit ​​part, and a mating part adapted to the mating groove is also provided on the side of the snap-fit ​​groove of the adjacent conductive plate, so that when the adjacent conductive plates are assembled together, the mating part is adapted to the mating groove.

3. The PTC heater for an electric heater according to claim 1, characterized in that: The PTC heater used in the electric heater also includes an insulating mounting shell, which includes a first ceramic substrate and a second ceramic substrate. The first ceramic substrate and the second ceramic substrate are connected to form a mounting position, and the heating element, corrugated heat dissipation aluminum sheet, electrode plate and conductive plate are located within the mounting position.

4. The PTC heater for an electric heater according to claim 3, characterized in that: At least a portion of the conductive plate is exposed outside the insulating mounting housing, wherein a terminal block is connected to the exposed portion of the conductive plate, and a connecting wire is connected to the terminal block.

5. The PTC heater for an electric heater according to claim 1, characterized in that: The corrugated heat sink aluminum sheet has multiple peaks, and a conductive layer is coated on the top surface of each peak. In the assembled state, the conductive layer maintains electrical contact with the surface of the adjacent conductive plate facing away from the heating element, so that current can be conducted between the adjacent heating elements through the conductive plate and the conductive layer.

6. The PTC heater for an electric heater according to claim 5, characterized in that: The conductive layer is a conductive coating.

7. The PTC heater for an electric heater according to claim 6, characterized in that: The conductive coating is silver paste.

8. The PTC heater for an electric heater according to claim 1, characterized by: The conductive plate is made of aluminum.

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