High-power string type PTC heater

Abstract

The utility model discloses a high -power group string formula PTC heater, including PTC heating sheet, corrugated aluminium strip, aluminium connecting sheet, mounting seat and connecting frame, the outside of aluminium connecting sheet still is provided with reinforcing plate, be provided with upper buckle groove and lower buckle groove on the mounting seat, upper buckle groove and lower buckle groove are opposite and are located to form the insertion interface of one -end opening, the connecting frame is used for with external zero parts connection cooperation, the right side of connecting frame sets up and sets up upper buckle department and lower buckle department respectively, the connecting frame is along the insertion interface and is clamped on the mounting seat, make upper buckle department with upper buckle groove interlocking, lower buckle department and lower buckle groove interlock, like this, through the reinforcing plate of aluminium connecting sheet outside and make the aluminium connecting sheet outside, make the overall structural strength of reinforcing heating module, improved the stability of heater under the complex working condition such as vibration, impact and heater can along insertion interface quick clamping on the mounting seat, and the installation process is simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of PTC heaters, and in particular to a high-power string PTC heater. Background Technology

[0002] PTC heating element is a new type of constant-temperature heating element. It consists of two metal plates attached to both sides of the PTC heating element and two wires as current-carrying electrodes. It does not require additional temperature control devices and features continuous heating, safety and reliability, stable power, and wide operating voltage.

[0003] In fields such as industrial heating, HVAC, and new energy equipment, the demand for high-power heaters is increasing. Traditional heaters often use a single heating element or a simple combination structure, which has problems such as low power density, poor heat dissipation efficiency, and insufficient structural stability.

[0004] PTC heaters consist of PTC ceramic heating elements and aluminum tubes, offering advantages such as low thermal resistance and high heat exchange efficiency. They are automatic temperature-controlled and energy-saving electric heaters. The main component of a PTC heater is the PTC heating element, which is primarily composed of a ceramic heating element and an aluminum component. The outer surface of the PTC heating element is typically made of aluminum. However, aluminum has relatively low strength. In practical applications, when the length of the PTC heating element exceeds 800mm, the overall strength of the outer surface of the PTC heating element is low, making it prone to deformation.

[0005] Secondly, both ends of the PTC ceramic heating element and the aluminum tube are equipped with fixed brackets to form a connection with external components. The fixed brackets are usually fixed to the external components by screws. This screw fixing method has the following defects: for example, the screw fixing is a rigid connection, and long-term vibration can easily cause the screws to loosen, requiring periodic retightening. During later maintenance, the screws will rust and become stuck after long-term use, making disassembly difficult.

[0006] Therefore, a new technical solution needs to be researched to address the above problems. Utility Model Content

[0007] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a high-power string PTC heater. This heater utilizes a reinforcing plate welded to the outside of the aluminum connecting piece, which enhances the overall structural strength of the heating module, improves the heater's stability under complex operating conditions such as vibration and impact, reduces the risk of failure due to structural loosening, ensures long-term reliable operation, and is less prone to deformation and damage during practical applications, exhibiting a low failure rate, long service life, and higher stability and safety. Furthermore, the snap-fit ​​connection between the connecting frame and the mounting base allows the upper snap-fit ​​part to engage with the upper snap-fit ​​groove, and the lower snap-fit ​​part to engage with the lower snap-fit ​​groove. This enables the heater to be quickly snapped onto the mounting base along the insertion interface, making the installation process simple and convenient.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A high-power string PTC heater includes a PTC heating element, corrugated aluminum strips, aluminum connecting plates, a mounting base, and a connecting frame. Several aluminum connecting plates are arranged parallel to each other on the left and right sides. The PTC heating elements are arranged between adjacent aluminum connecting plates in the middle, and the corrugated aluminum strips are arranged between adjacent aluminum connecting plates on the sides, so that the PTC heating elements, corrugated aluminum strips, and aluminum connecting plates constitute a heating module.

[0010] A reinforcing plate is also provided on the outer side of the aluminum connecting piece, and the reinforcing plate is welded to the outside of the aluminum connecting piece; the mounting base is welded to the left and right sides of the reinforcing plate, wherein the mounting base is provided with an upper fastening groove and a lower fastening groove, and the upper fastening groove and the lower fastening groove are arranged opposite each other to form a plug interface with one end open.

[0011] The connecting frame is used to connect and cooperate with external components. The right side of the connecting frame is provided with an upper fastening part and a lower fastening part for cooperating with the upper fastening groove and the lower fastening groove, respectively. The connecting frame is snapped onto the mounting base along the insertion interface, so that the upper fastening part is snapped into the upper fastening groove and the lower fastening part is snapped into the lower fastening groove.

[0012] As a preferred embodiment, the reinforcing plate and the aluminum connecting piece are made of the same material, and both the reinforcing plate and the aluminum connecting piece are made of aluminum.

[0013] As a preferred embodiment, the reinforcing plate includes a first reinforcing plate body, a second reinforcing plate body, a third reinforcing plate body, and a fourth reinforcing plate body. The first reinforcing plate body, the second reinforcing plate body, the third reinforcing plate body, and the fourth reinforcing plate body are respectively brazed to the upper, lower, left, and right sides of the mounting base. The reinforcing plates are connected and fixed by brazing, which can make the connection between the reinforcing plate and the PTC heating element tight and stable, without leaving gaps.

[0014] As a preferred embodiment, the upper right side of the mounting base is provided with a first extension portion, and the lower end of the first extension portion is provided with a second extension portion. The left side wall of the mounting base, the lower end of the first extension portion, and the right side of the second extension portion form an upper fastening groove.

[0015] A third extension is provided along the lower right side of the mounting base, and a fourth extension is provided along the lower end of the third extension. A lower locking groove is formed between the left side wall of the mounting base, the lower end of the third extension, and the right side of the fourth extension.

[0016] As a preferred embodiment, the connecting frame includes a main body and a vertical portion extending from the right side of the main body. The upper and lower fastening portions extend upward and downward from the right side of the vertical portion, respectively.

[0017] The right side wall of the main body, the upper side wall of the first vertical part, and the left side wall of the upper fastening part form an upper mating groove for the second extension to engage. The right side wall of the main body, the upper side wall of the first vertical part, and the right side wall of the lower fastening part form a lower mating groove for the fourth extension to engage.

[0018] When the mounting base and the connecting bracket are connected, the second extension is engaged in the upper mating groove, and the fourth extension is engaged in the lower mating groove to ensure the stability of the connection between the mounting base and the connecting bracket, so as to prevent them from loosening and affecting their use.

[0019] As a preferred embodiment, the connecting frame is also provided with a locking hole, which extends through the connecting frame.

[0020] As a preferred embodiment, the PTC heating element is connected to a lead wire, and the outer end of the lead wire is connected to a connector.

[0021] 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 uses a heating module composed of a PTC heating element, corrugated aluminum strips and aluminum connecting pieces to fully utilize the self-limiting temperature characteristics of the PTC heating element, which can achieve stable and efficient heating. The corrugated aluminum strips increase the heat dissipation area, and combined with the good thermal conductivity of the aluminum connecting pieces, the heat dissipation efficiency is effectively improved, avoiding overheating of the heating module when operating at high power and extending the service life of the heater.

[0022] Secondly, the reinforcing plate on the outside of the aluminum connecting piece is welded to the outside of the aluminum connecting piece, which enhances the overall structural strength of the heating module, improves the stability of the heater under complex working conditions such as vibration and impact, reduces the risk of failure caused by structural loosening, ensures that the heater can operate reliably for a long time, and is not easily deformed or damaged in actual application, with a low failure rate, long service life, and higher stability and safety.

[0023] Furthermore, the snap-fit ​​mechanism between the connecting bracket and the mounting base allows the upper snap-fit ​​part to engage with the upper snap-fit ​​groove, and the lower snap-fit ​​part to engage with the lower snap-fit ​​groove. This enables the heater to be quickly snapped onto the mounting base along the insertion interface, making the installation process simple and convenient. At the same time, the connecting bracket can be connected and fitted with a variety of external components, greatly improving the flexibility of heater installation. It can be widely used in different equipment and application scenarios, effectively expanding the product's applicability.

[0024] 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

[0025] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0026] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0027] Figure 3 yes Figure 2 Enlarged view of a portion of point A in the middle.

[0028] Explanation of reference numerals in the attached diagram:

[0029] 1. PTC heating element 2. Corrugated aluminum strip

[0030] 3. Aluminum connecting piece

[0031] 4. Mounting base 41, upper snap-fit ​​groove

[0032] 42. Lower snap-fit ​​groove 43. Insertion interface

[0033] 411. First extension section; 412. Second extension section

[0034] 413. Third extension; 414. Fourth extension

[0035] 5. Connecting bracket 51, upper fastening part

[0036] 52. Lower snap-fit ​​part; 53. Main body part

[0037] 54. Vertical section 55. Upper connecting groove

[0038] 56. Lower connecting groove; 57. Locking hole

[0039] 6. Reinforcing plate 61. First reinforcing plate body

[0040] 62. Second reinforcing plate 63. Third reinforcing plate

[0041] 64. Fourth reinforcing plate. Detailed Implementation

[0042] Please refer to Figures 1 to 3 As shown, it illustrates the specific structure of an embodiment of the present invention.

[0043] 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.

[0044] A high-power string PTC heater includes a PTC heating element 1, a corrugated aluminum strip 2, an aluminum connecting piece 3, a mounting base 4, and a connecting frame 5.

[0045] Among them, several aluminum connecting pieces 3 are arranged parallel to each other on the left and right sides, the PTC heating element 1 is arranged between adjacent aluminum connecting pieces 3 in the middle, and the corrugated aluminum strip 2 is arranged between adjacent aluminum connecting pieces 3 on the side, so that the PTC heating element 1, the corrugated aluminum strip 2, and the aluminum connecting pieces 3 constitute a heating module.

[0046] A reinforcing plate 6 is also provided on the outer side of the aluminum connecting piece 3, and the reinforcing plate 6 is welded to the outside of the aluminum connecting piece 3; the mounting base 4 is welded to the left and right sides of the reinforcing plate 6.

[0047] Preferably, the reinforcing plate 6 and the aluminum connecting piece 3 are made of the same material, and both the reinforcing plate 6 and the aluminum connecting piece 3 are made of aluminum. Preferably, the reinforcing plate 6 includes a first reinforcing plate body 61, a second reinforcing plate body 62, a third reinforcing plate body 63, and a fourth reinforcing plate body 64. The first reinforcing plate body 61, the second reinforcing plate body 62, the third reinforcing plate body 63, and the fourth reinforcing plate body 64 are respectively brazed to the upper, lower, left, and right sides of the mounting base 4. The reinforcing plates are connected and fixed by brazing, which can make the connection between the reinforcing plate and the PTC heating element tight and stable, without leaving gaps.

[0048] The mounting base 4 is provided with an upper snap-fit ​​groove 41 and a lower snap-fit ​​groove 42, which are arranged opposite each other to form a plug-in interface 43 with one end open; a first extension 411 is provided along the upper right side of the mounting base 4, and a second extension 412 is provided along the lower end of the first extension 411; the upper snap-fit ​​groove 41 is formed between the left side wall of the mounting base 4, the lower end of the first extension 411, and the right side of the second extension 412.

[0049] A third extension 413 is provided along the lower right side of the mounting base 4, and a fourth extension 414 is provided along the lower end of the third extension 413. A lower locking groove 42 is formed between the left side wall of the mounting base 4, the lower end of the third extension 413, and the right side of the fourth extension 414.

[0050] The connecting frame 5 is used to connect and cooperate with external components. The right side of the connecting frame 5 is provided with an upper fastening part 51 and a lower fastening part 52 for cooperating with the upper fastening groove 41 and the lower fastening groove 42, respectively. The connecting frame 5 is snapped onto the mounting base 4 along the insertion interface 43, so that the upper fastening part 51 is snapped into the upper fastening groove 41 and the lower fastening part 52 is snapped into the lower fastening groove 42.

[0051] The connecting frame 5 includes a main body 53 and a vertical part 54 extending from the right side of the main body 53. The upper fastening part 51 and the lower fastening part 52 extend upward and downward from the right side of the vertical part 54, respectively.

[0052] The right side wall of the main body 53, the upper side wall of the first vertical part 54, and the left side wall of the upper fastening part 51 form an upper mating groove 55 for the second extension part 412 to engage. The right side wall of the main body 53, the upper side wall of the first vertical part 54, and the right side wall of the lower fastening part 52 form a lower mating groove 56 for the fourth extension part 414 to engage.

[0053] When the mounting base 4 and the connecting bracket 5 are connected, the second extension 412 is engaged in the upper docking groove 55, and the fourth extension 414 is engaged in the lower docking groove 56 to ensure the stability of the connection between the mounting base 4 and the connecting bracket 5, so as to prevent them from loosening and affecting their use.

[0054] Preferably, the connecting frame 5 is further provided with a locking hole 57, which penetrates through the connecting frame 5. Preferably, the PTC heating element 1 is connected to a lead wire (not shown in the figure), and the outer end of the lead wire is connected to a connector. The mounting base 4 is a mica plate. In this embodiment, a clearance hole can be opened on the side of the lead wire near the reinforcing plate to allow the lead wire to extend.

[0055] The key design feature of this invention is that it is a heating module composed of a PTC heating element, corrugated aluminum strips, and aluminum connecting plates. It fully utilizes the self-limiting temperature characteristics of the PTC heating element to achieve stable and efficient heating. The corrugated aluminum strips increase the heat dissipation area, and combined with the good thermal conductivity of the aluminum connecting plates, it effectively improves the heat dissipation efficiency, avoids overheating of the heating module when operating at high power, and extends the service life of the heater.

[0056] Secondly, the reinforcing plate on the outside of the aluminum connecting piece is welded to the outside of the aluminum connecting piece, which enhances the overall structural strength of the heating module, improves the stability of the heater under complex working conditions such as vibration and impact, reduces the risk of failure caused by structural loosening, ensures that the heater can operate reliably for a long time, and is not easily deformed or damaged in actual application, with a low failure rate, long service life, and higher stability and safety.

[0057] Furthermore, the snap-fit ​​mechanism between the connecting bracket and the mounting base allows the upper snap-fit ​​part to engage with the upper snap-fit ​​groove, and the lower snap-fit ​​part to engage with the lower snap-fit ​​groove. This enables the heater to be quickly snapped onto the mounting base along the insertion interface, making the installation process simple and convenient. At the same time, the connecting bracket can be connected and fitted with a variety of external components, greatly improving the flexibility of heater installation. It can be widely used in different equipment and application scenarios, effectively expanding the product's applicability.

[0058] 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 high power stringed PTC heater characterized by: It includes a PTC heating element, corrugated aluminum strips, aluminum connecting pieces, a mounting base, and a connecting frame. Several aluminum connecting pieces are arranged parallel to each other on the left and right sides. The PTC heating element is arranged between adjacent aluminum connecting pieces in the middle, and the corrugated aluminum strip is arranged between adjacent aluminum connecting pieces on the side, so that the PTC heating element, corrugated aluminum strips, and aluminum connecting pieces constitute a heating module. A reinforcing plate is also provided on the outer side of the aluminum connecting piece, and the reinforcing plate is welded to the outside of the aluminum connecting piece; the mounting base is welded to the left and right sides of the reinforcing plate, wherein the mounting base is provided with an upper fastening groove and a lower fastening groove, and the upper fastening groove and the lower fastening groove are arranged opposite each other to form a plug interface with one end open. The connecting frame is used to connect and cooperate with external components. The right side of the connecting frame is provided with an upper fastening part and a lower fastening part for cooperating with the upper fastening groove and the lower fastening groove, respectively. The connecting frame is snapped onto the mounting base along the insertion interface, so that the upper fastening part is snapped into the upper fastening groove and the lower fastening part is snapped into the lower fastening groove.

2. The high power string PTC heater of claim 1, wherein: The reinforcing plate and the aluminum connecting piece are made of the same material, and both the reinforcing plate and the aluminum connecting piece are made of aluminum.

3. The high power string PTC heater of claim 2, wherein: The reinforcing plate includes a first reinforcing plate body, a second reinforcing plate body, a third reinforcing plate body, and a fourth reinforcing plate body, which are respectively brazed to the upper, lower, left, and right sides of the mounting base.

4. The high power string PTC heater of claim 1, wherein: The upper right side of the mounting base is provided with a first extension portion, and the lower end of the first extension portion is provided with a second extension portion. The left side wall of the mounting base, the lower end of the first extension portion and the right side of the second extension portion form an upper fastening groove. A third extension is provided along the lower right side of the mounting base, and a fourth extension is provided along the lower end of the third extension. A lower locking groove is formed between the left side wall of the mounting base, the lower end of the third extension, and the right side of the fourth extension.

5. The high power string PTC heater of claim 4, wherein: The connecting frame includes a main body and a vertical part extending from the right side of the main body. The upper and lower fastening parts extend upward and downward from the right side of the vertical part, respectively. The right side wall of the main body, the upper side wall of the first vertical part, and the left side wall of the upper fastening part form an upper mating groove for the second extension to engage. The right side wall of the main body, the upper side wall of the first vertical part, and the right side wall of the lower fastening part form a lower mating groove for the fourth extension to engage. When the mounting base and the connecting bracket are connected, the second extension is engaged in the upper docking groove, and the fourth extension is engaged in the lower docking groove.

6. The high power stringed PTC heater of claim 1, wherein: The connecting frame is also provided with a locking hole, which extends through the connecting frame.

7. The high power stringed PTC heater of claim 1, wherein: The PTC heating element is connected to a lead wire, and the outer end of the lead wire is connected to a connector.

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