A high-power metal PTC electric heater

Abstract

The utility model is suitable for electric heater technical field provides a kind of high-power metal PTC electric heater, comprising: electric heater main body, the electric heater main body is by three electric heating plates, three the electric heating plate is in parallel, three the electric heating plate is all provided with electrode and connecting terminal;The upper and lower ends of the electric heater main body are detachably fixedly connected with connecting seat through bolt nut, two the connecting seat is all provided with connecting assembly and mounting assembly, by setting mounting assembly, it is convenient to install multiple groups of electric heating main body connected by two connecting seats, to facilitate the adjustment of power increase or reduction according to the quantity of connection, it is convenient to fix and disassemble, by setting connecting assembly, it is convenient to install docking under different conditions.

Description

Technical Field

[0001] This utility model belongs to the field of electric heater technology, and particularly relates to a high-power metal PTC electric heater. Background Technology

[0002] PTC heating elements, also known as PTC heaters, consist of PTC ceramic heating elements and aluminum tubes. This type of PTC heating element has the advantages of low thermal resistance and high heat exchange efficiency, and is an automatic temperature-controlled, energy-saving electric heater.

[0003] The existing technology still has the following shortcomings: Existing technologies have fixed power outputs that cannot be increased or decreased as needed. Furthermore, they are inconvenient to install, have significant limitations, and cannot be matched to different working conditions for positioning and installation. Utility Model Content

[0004] This utility model provides a high-power metal PTC electric heater, which aims to solve the problems of existing technologies with fixed power that cannot be increased or decreased as needed, as well as inconvenient installation, large installation limitations, and inability to match the positioning and installation under different working conditions.

[0005] This utility model is implemented as follows: a high-power metal PTC electric heater includes: an electric heater body, which is composed of three electric heating plates connected in parallel, and each of the three electric heating plates is provided with electrodes and connecting terminals; the upper and lower ends of the electric heater body are respectively detachably fixed to connecting seats by bolts and nuts, and the three-phase electrodes of all electric heating plates are connected in parallel.

[0006] Both of the aforementioned connectors are integrally molded strip-shaped mounting plates.

[0007] Both of the connecting seats are provided with connecting components and mounting components; both connecting components include a fixing sleeve that is fixedly connected to one side of the connecting seat, a fixing groove is provided on one side of the fixing sleeve, and a docking block is fixedly connected to the other side of the connecting seat respectively, and the docking block and the fixing groove can be inserted into each other.

[0008] Preferably, both connecting components further include a first magnetic plate fixedly connected to the bottom of the fixing groove; a second magnetic block is fixedly connected to one side of the docking block; positioning grooves are respectively opened at the upper and lower ends of the docking block, and through grooves are respectively opened at the upper and lower ends of the fixing sleeve and at the corresponding positions of the two positioning grooves, and the two through grooves are respectively connected to the fixing groove.

[0009] Preferably, each of the two connecting components further includes a pull plate disposed at the upper and lower ends of the fixed sleeve. The two pull plates are respectively fixedly connected to a positioning rod on one side near the two through slots. The extended ends of the two positioning rods are respectively inserted through the two through slots and the two positioning slots.

[0010] Preferably, each of the two connecting components further includes a third magnetic plate installed at the bottom of the two positioning grooves, and a fourth magnetic plate is fixedly connected to the bottom of each of the two positioning rods. The two third magnetic plates and the two fourth magnetic plates attract each other. A spring is sleeved on each of the two positioning rods. One side of each spring is fixedly connected to both sides of the fixing sleeve, and the other side of each spring is fixedly connected to the two pull plates.

[0011] Preferably, both mounting components include fixed tubes installed at opposite ends of the connecting seat and the electric heater body, with movable rods slidably sleeved on the other side of each fixed tube, and the same mounting plate fixedly connected to the other side of each movable rod.

[0012] Preferably, both of the mounting components also include limiting holes distributed from top to bottom around the two movable rods, and elastic blocks are fixedly connected to the inner periphery of the two fixed tubes respectively, with the eight elastic blocks engaging with the eight limiting holes at corresponding positions.

[0013] Compared with the prior art, the embodiments of this application have the following main advantages: By setting up the installation components, it is easy to install multiple electric heating bodies connected by two connectors, which facilitates the adjustment of power increase or decrease according to the number of connections, and makes fixing and disassembly easy. The connection components also facilitate installation and docking under different conditions. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model; Figure 2 This is a front view structural diagram of the present invention; Figure 3 This is a three-dimensional top view of the structure of this utility model; Figure 4 This is a utility model Figure 2 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the structure when the fixing sleeve and the docking block of this utility model are connected; Figure 6 This is a schematic diagram of the structure when the fixed tube and the movable rod of this utility model are connected; Figure 7 This is a schematic diagram of Embodiment 2 of this utility model; In the diagram: 1. Electric heater body; 2. Connecting seat; 4. Mounting assembly; 5. Connecting assembly; 7. Fixing sleeve; 8. Connecting block; 9. Fixing groove; 10. Positioning groove; 11. Third magnetic plate; 12. Through groove; 13. Pull plate; 14. Positioning rod; 15. Fourth magnetic plate; 16. Spring; 17. Second magnetic block; 18. First magnetic plate; 22. Fixing tube; 23. Movable rod; 24. Mounting plate; 25. Elastic block; 26. Limiting hole. Detailed Implementation

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0016] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0017] Example 1: This utility model embodiment provides a high-power metal PTC electric heater, such as Figure 1-7 As shown, it includes: an electric heater body 1, which is composed of three electric heating plates connected in parallel, and each of the three electric heating plates is provided with electrodes and connection terminals; the upper and lower ends of the electric heater body 1 are respectively detachably fixedly connected to connecting seats 2 by bolts and nuts, and each of the two connecting seats 2 is provided with a connecting component 5 and an installation component 4; each of the two connecting components 5 includes a fixing sleeve 7 fixedly connected to one side of the connecting seat 2, and a fixing groove 9 is opened on one side of the fixing sleeve 7. The other side of the connecting seat 2 is respectively fixedly connected to a mating block 8, and the mating block 8 and the fixing groove 9 can be inserted into each other.

[0018] The electric heater body 1 uses a positive temperature coefficient (PTC) heating alloy as the heating element. Unlike commonly used Ocr25Al5 and Ni80Cr20, it has a significantly higher temperature coefficient of resistance. As the operating temperature increases, the resistance increases rapidly and non-linearly, resulting in a decrease in power. It has an automatic temperature regulation function; once the temperature reaches a certain value, the power decreases and the temperature stops rising, achieving a constant temperature. This product is used in the field of customized large commercial cabinet air conditioners. It adopts a 6-group longitudinal arrangement of heating elements, enabling 2-level control and 6KW or 12KW power output. This product has dual protection devices: a thermostat and fuses. The thermostats (4 units) are connected to the low-voltage control power supply, and the fuses (6 units) are connected in series in each phase of the high-voltage wiring harness. Each group of heating elements and the sheet metal supports on both sides are insulated with black insulating washers to prevent safety accidents caused by leakage from the heating elements themselves due to other faults (Note: the surface of the heating element itself is insulated and non-energized). Note: The metal PTC thermistor alloy wire has the following outstanding advantages: 1. Fast heating speed; the resistance value of the heating element is calculated based on the operating temperature. 1. Low resistance at room temperature; the heating element surface reaches the designed temperature within seconds after being powered on. 2. Energy saving; as the power decreases with increasing temperature, it stops rising at a certain temperature, achieving energy saving. 3. Long lifespan; due to its self-regulating function, unexpected increases in operating voltage or temperature rise caused by unexpected fan stoppage will lead to a power decrease, effectively controlling overheating damage. 4. Stable performance; long-term use proves that the resistivity and temperature coefficient of resistance remain unchanged. The power decrease of metal PTC electric heaters is approximately 1-3%. The power decay of ceramic PTC heaters is approximately 10%.

[0019] Metal PTCs have a strong automatic temperature regulation function. They are highly sensitive when adjusting heating power by airflow under air supply conditions, making them particularly suitable for operation under low-speed airflow conditions in air conditioners.

[0020] It should be noted that, due to the fixed power of existing technology, it cannot be increased or decreased as needed. At the same time, the existing technology is inconvenient to install and has great limitations, and cannot be matched with positioning installation under different working conditions. This solution, by setting the installation component 4, facilitates the installation of multiple electric heater bodies 1 connected by two connecting seats 2, thereby facilitating the adjustment of power increase or decrease according to the number of connections, and facilitating fixing and disassembly. By setting the connecting component 5, it is easy to install and connect under different conditions, and it is easy to adjust the position of the mounting plate 24. Preferably, the electric heater body 1 is a PTC electric heater, and the specific structure and principle are existing technologies, which will not be described in detail here.

[0021] In a further preferred embodiment of this utility model, such as Figure 1-5As shown, both connecting components 5 also include a first magnetic plate 18 fixedly connected to the bottom of the fixing groove 9; a second magnetic block 17 is fixedly connected to one side of the docking block 8; positioning grooves 10 are respectively opened at the upper and lower ends of the docking block 8, and through grooves 12 are respectively opened at the upper and lower ends of the fixing sleeve 7 and the two positioning grooves 10, and the two through grooves 12 are respectively connected to the fixing groove 9.

[0022] In this embodiment, for ease of connection, preferably, a set of docking blocks 8 of the electric heater body 1 connected by two connecting seats 2 and another set of fixing slots 9 of the electric heater body 1 connected by two connecting seats 2 are inserted into each other, which facilitates the connection of multiple sets of electric heater bodies 1, and also facilitates the reduction according to actual conditions.

[0023] In a further preferred embodiment of this utility model, such as Figure 1-5 As shown, both connecting components 5 also include pull plates 13 disposed at the upper and lower ends of the fixed sleeve 7. Positioning rods 14 are fixedly connected to the side of the two pull plates 13 near the two through slots 12 respectively. The extended ends of the two positioning rods 14 are inserted through the two through slots 12 and the two positioning slots 10 respectively.

[0024] In this embodiment, by pulling the pull plate 13, the positioning rod 14 can be moved, thereby facilitating disassembly or fixation.

[0025] In a further preferred embodiment of this utility model, such as Figure 1-5 As shown, each of the two connecting components 5 also includes a third magnetic plate 11 installed at the bottom of the two positioning grooves 10. The bottom of the two positioning rods 14 is fixedly connected to a fourth magnetic plate 15. The two third magnetic plates 11 and the two fourth magnetic plates 15 are attracted to each other. A spring 16 is sleeved on each of the two positioning rods 14. One side of the two springs 16 is fixedly connected to both sides of the fixing sleeve 7, and the other side of the two springs 16 is fixedly connected to the two pull plates 13.

[0026] In this embodiment, installing a magnetic plate makes the connection more stable and improves the fixing effect.

[0027] In a further preferred embodiment of this utility model, such as Figure 1-7 As shown, both mounting components 4 include fixed tubes 22 installed at opposite ends of the connecting seat 2 and the electric heater body 1. Movable rods 23 are slidably sleeved on the other side of the two fixed tubes 22, and the same mounting plate 24 is fixedly connected to the other side of the two movable rods 23.

[0028] In this embodiment, the position of the mounting plate 24 can be adjusted by pulling the fixed tube 22 out by the movable rod 23, which is convenient for installation in various situations.

[0029] In a further preferred embodiment of this utility model, such as Figure 1-7 As shown, both mounting components 4 also include limiting holes 26 distributed from top to bottom around the two movable rods 23, and elastic blocks 25 are fixedly connected to the inner periphery of the two fixed tubes 22 respectively. The eight elastic blocks 25 are respectively engaged with the eight limiting holes 26 at the corresponding positions.

[0030] In this embodiment, it is convenient to fix the position of the movable rod 23 when it is pulled out of the fixed tube 22.

[0031] All electrical components mentioned in this article are electrically connected to the controller and power supply. The control method of this utility model is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail.

[0032] It should be noted that, for the sake of simplicity, the foregoing embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0033] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units described above may be implemented in other ways in practice. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0034] Example 2: A high-power metal PTC electric heater includes: an electric heater body 1, which is composed of three electric heating plates connected in parallel, and each of the three electric heating plates is provided with electrodes and connecting terminals; the electric heating efficiency can be improved by connecting several electric heating plates in parallel.

[0035] The upper and lower ends of the electric heater body 1 are respectively detachably fixed to the connecting seat 2 by bolts and nuts. All three-phase electrodes of the electric heating plates are connected in parallel. Both connecting seats 2 are integrally formed strip mounting plates. This method makes the fixing method on the connecting seat more convenient.

[0036] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0037] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A high-power metal PTC electric heater, characterized in that, include: The electric heater body (1) is composed of three electric heating plates connected in parallel. Each of the three electric heating plates is provided with electrodes and connecting terminals. The upper and lower ends of the electric heater body (1) are respectively detachably fixed with connecting seats (2) by bolts and nuts, and the three-phase electrodes of all electric heating plates are connected in parallel.

2. A high-power metal PTC electric heater as described in claim 1, characterized in that, Both of the connecting seats (2) are integrally formed strip mounting plates.

3. A high-power metal PTC electric heater as described in claim 1, characterized in that, Both of the connecting seats (2) are provided with connecting components (5) and mounting components (4); Both of the connecting components (5) include a fixing sleeve (7) that is fixedly connected to one side of the connecting seat (2). A fixing groove (9) is provided on one side of the fixing sleeve (7). A docking block (8) is fixedly connected to the other side of the connecting seat (2). The docking block (8) and the fixing groove (9) can be inserted into each other. Both of the connecting components (5) also include a first magnetic plate (18) fixedly connected to the bottom of the fixing groove (9); A second magnetic block (17) is fixedly connected to one side of the docking block (8); The upper and lower ends of the docking block (8) are respectively provided with positioning grooves (10), and the upper and lower ends of the fixing sleeve (7) and the two positioning grooves (10) are respectively provided with through grooves (12), and the two through grooves (12) are respectively connected to the fixing groove (9).

4. A high-power metal PTC electric heater as described in claim 3, characterized in that, Both of the connecting components (5) also include pull plates (13) disposed at the upper and lower ends of the fixed sleeve (7). The two pull plates (13) are respectively fixedly connected to a positioning rod (14) on one side near the two through slots (12). The extended ends of the two positioning rods (14) are respectively inserted through the two through slots (12) and the two positioning slots (10).

5. A high-power metal PTC electric heater as described in claim 4, characterized in that, Both of the connecting components (5) also include a third magnetic plate (11) installed at the bottom of the two positioning grooves (10), and a fourth magnetic plate (15) is fixedly connected to the bottom of the two positioning rods (14). The two third magnetic plates (11) and the two fourth magnetic plates (15) are attracted to each other. A spring (16) is sleeved on each of the two positioning rods (14). One side of the two springs (16) is fixedly connected to both sides of the fixing sleeve (7), and the other side of the two springs (16) is fixedly connected to the two pull plates (13).

6. A high-power metal PTC electric heater as described in claim 3, characterized in that, Both of the mounting components (4) include fixed tubes (22) installed at opposite ends of the connecting seat (2) and the electric heater body (1), and movable rods (23) are slidably sleeved on the other side of the two fixed tubes (22), and the same mounting plate (24) is fixedly connected to the other side of the two movable rods (23).

7. A high-power metal PTC electric heater as described in claim 6, characterized in that, Both of the mounting components (4) also include limiting holes (26) distributed from top to bottom around the two movable rods (23), and elastic blocks (25) are fixedly connected to the inner periphery of the two fixed tubes (22), and the eight elastic blocks (25) are respectively engaged with the eight limiting holes (26) at the corresponding positions.

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