PTC heater structure

Abstract

The utility model discloses a PTC (Positive Temperature Coefficient) heater structure, relates to the field of PTC heaters, and aims to solve the problems that a plurality of heating units in the existing PTC heater in the prior art are fixedly arranged, so that the whole heater needs to be disassembled when a single heating unit is damaged, and the single heating unit is inconvenient to maintain and replace. Rectangular connecting pieces are fixedly connected to the middles and the two sides of the lower ends of the two middle PTC heater units and the top PTC heater unit correspondingly, and U-shaped connecting pieces are fixedly connected to the middles and the two sides of the upper ends of the two middle PTC heater units and the bottom PTC heater unit correspondingly. The heating units are quickly assembled and disassembled through the insertion connection of the rectangular connecting pieces and the U-shaped connecting pieces and the fixation of the lengthened screw rods.

Description

Technical Field

[0001] This utility model relates to the field of PTC heaters, specifically a PTC heater structure. Background Technology

[0002] A PTC heater is an electric heater composed of a PTC ceramic heating element and metal components such as an aluminum tube. It utilizes the positive temperature coefficient characteristic of PTC material; when energized, it generates heat to raise the ambient temperature. However, when the temperature reaches a certain level, the resistance of the PTC material increases sharply, restricting current flow and achieving a self-stabilizing state. PTC heaters offer advantages such as low thermal resistance, high heat exchange efficiency, automatic temperature control, and safety and reliability. They are widely used in home appliances, automobiles, medical devices, and military industries, providing a highly efficient, safe, and energy-saving electric heating solution.

[0003] For example, according to patent announcement number CN220067717U, a PTC heater structure includes connectors for connecting a heating element and terminal pieces. Each connector is further provided with a protective element, and at least one set of heat dissipation elements is disposed on the heating element. These heat dissipation elements are either disposed within or outside the housing of the heating element. This application provides a PTC heater structure that is simple in structure, easy to manufacture, has low production costs, can automatically protect the heating components, is easy to replace, and has good safety performance.

[0004] In existing PTC heaters, multiple heating units are fixedly connected, which means that if a single heating unit fails, the entire heater needs to be disassembled, making it inconvenient to repair or replace individual heating units. Therefore, there is an urgent need in the market to develop a PTC heater structure to help people solve the existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide a PTC heater structure to solve the problem mentioned in the background art that in existing PTC heaters, multiple heating units are fixedly arranged, which requires the entire heater to be disassembled when a single heating unit is damaged, and makes it inconvenient to repair or replace a single heating unit.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a PTC heater structure, comprising a middle PTC heater unit, a top PTC heater unit, and a bottom PTC heater unit. Two middle PTC heater units are vertically aligned. The upper end of the upper middle PTC heater unit is connected to the top PTC heater unit, and the lower end of the lower middle PTC heater unit is connected to the bottom PTC heater unit. Rectangular connectors are fixedly connected to the lower center and both sides of the lower ends of both middle and top PTC heater units. U-shaped connectors are fixedly connected to the upper center and both sides of the upper ends of both middle and bottom PTC heater units. A connecting piece is fixedly connected to the lower end of one side of each of the middle, top, and bottom PTC heater units, and a conductive sheet is fixedly connected to the front end of each connecting piece.

[0007] Preferably, each of the U-shaped connectors has a rectangular slot inside, and a limiting piece is fixedly connected to the rear end of each of the U-shaped connectors.

[0008] Preferably, the three rectangular connectors on the upper middle PTC heater unit are respectively inserted into the rectangular slots of the three U-shaped connectors on the lower middle PTC heater unit, the three rectangular connectors on the top PTC heater unit are respectively inserted into the rectangular slots of the three U-shaped connectors on the upper middle PTC heater unit, and the three rectangular connectors on the lower middle PTC heater unit are respectively inserted into the rectangular slots of the three U-shaped connectors on the bottom PTC heater unit.

[0009] Preferably, the three rectangular connectors between the two middle PTC heater units, between the top PTC heater unit and the upper middle PTC heater unit, and between the lower middle PTC heater unit and the bottom PTC heater unit are respectively inserted into three U-shaped connectors and then fixedly connected by an extended screw.

[0010] Preferably, an insulating terminal housing is connected to the outside of the conductive sheet, and a C-shaped connecting piece is fixedly disposed inside the insulating terminal housing. The conductive sheet is inserted into the inside of the C-shaped connecting piece inside the insulating terminal housing.

[0011] Preferably, the conductive sheet and the C-type connecting sheet are fixed together by bolts passing through the insulating terminal housing and threaded connecting nuts.

[0012] Preferably, a wire is fixedly connected to the middle of the front end of the C-shaped connecting piece, and the front end of the wire extends through the insulating terminal housing to the outside.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, the rapid assembly and disassembly of heating units are achieved through the insertion of rectangular connectors and U-shaped connectors and the fixing of extended screws. This design not only simplifies the manufacturing and maintenance process of the heater, but also improves production efficiency and reduces costs. At the same time, when a heating unit malfunctions, the user can easily remove and replace it without disassembling the entire heater.

[0015] (2) In this utility model, the conductive sheet and the C-type connecting piece are fixed by bolts and nuts, ensuring the stability and safety of current transmission. The use of an insulating terminal housing further enhances the isolation effect of the electrical connection, effectively preventing current leakage and electric shock accidents. In addition, the direct connection between the wire and the C-type connecting piece also reduces the failure points of the electrical connection and improves the overall reliability of the heater.

[0016] (3) In this utility model, the number of central PTC heater units can be increased or decreased as needed. This design provides high scalability and customization capabilities, allowing users to adjust the overall size and heating capacity of the heater according to specific usage environments and power requirements. Without changing the overall structure or redesigning, simply adding or reducing the corresponding central PTC heater units, and then using rectangular and U-shaped connectors for insertion and extended screws for fixing, allows for easy expansion or reduction of the heater. This flexible configuration meets diverse heating needs. Attached Figure Description

[0017] Figure 1 This is a front view of a PTC heater structure according to the present invention;

[0018] Figure 2 This is a front sectional view of the present invention;

[0019] Figure 3 This is a side sectional view of the insulating terminal housing of this utility model;

[0020] Figure 4 This is a side sectional view of the rectangular connector of this utility model;

[0021] Figure 5 This is a detailed enlarged view of part A of this utility model.

[0022] In the diagram: 1. Middle PTC heater unit; 101. Top PTC heater unit; 102. Bottom PTC heater unit; 2. Rectangular connector; 201. U-shaped connector; 202. Rectangular slot; 203. Limiting piece; 204. Extended screw; 3. Connecting piece; 4. Conductive piece; 5. Insulating terminal housing; 501. C-shaped connecting piece; 502. Wire; 503. Bolt. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Please see Figure 1-5 This utility model provides an embodiment of a PTC heater structure, including a middle PTC heater unit 1, a top PTC heater unit 101, and a bottom PTC heater unit 102. Two middle PTC heater units 1 are vertically aligned. The upper end of the upper middle PTC heater unit 1 is connected to the top PTC heater unit 101, and the lower end of the lower middle PTC heater unit 1 is connected to the bottom PTC heater unit 102. Rectangular connectors 2 are fixedly connected to the lower middle and lower sides of both middle and top PTC heater units 1 and 101. U-shaped connectors 201 are fixedly connected to the upper middle and upper sides of both middle and bottom PTC heater units 1 and 102. Each U-shaped connector 201 has a rectangular slot 202 inside, and a limiting piece 203 is fixedly connected to the rear end of each U-shaped connector 201. The three rectangular connectors 2 on the upper middle PTC heater unit 1 are respectively inserted into the lower middle PTC heater unit 1. The three rectangular connectors 2 on the top PTC heater unit 101 are inserted into the rectangular slots 202 of the three U-shaped connectors 201 on the upper middle PTC heater unit 1, respectively. The three rectangular connectors 2 on the lower middle PTC heater unit 1 are inserted into the rectangular slots 202 of the three U-shaped connectors 201 on the bottom PTC heater unit 102, respectively. The three rectangular connectors 2 between the two middle PTC heater units 1, between the top PTC heater unit 101 and the upper middle PTC heater unit 1, and between the lower middle PTC heater unit 1 and the bottom PTC heater unit 102 are respectively inserted into the three U-shaped connectors 201 and then fixedly connected by the extension screw 204. Through the cooperation of the rectangular connectors 2 and the U-shaped connectors 201, and the fixed connection of the extension screw 204, the detachable connection between the middle PTC heater unit 1, the top PTC heater unit 101 and the bottom PTC heater unit 102 is realized. When one of the heating units needs repair or replacement, simply loosen the extension screw 204 to separate the corresponding heating unit from the structure without disassembling the entire heater.

[0025] Please see Figure 1 , Figure 3 and Figure 5Each of the three PTC heater units—the middle PTC heater unit 1, the top PTC heater unit 101, and the bottom PTC heater unit 102—has a connecting piece 3 fixedly connected to its lower side. A conductive piece 4 is fixedly connected to the front end of each connecting piece 3. An insulating terminal housing 5 is connected to the outside of the conductive piece 4. A C-shaped connecting piece 501 is fixedly installed inside the insulating terminal housing 5. The conductive piece 4 is inserted into the inner side of the C-shaped connecting piece 501 inside the insulating terminal housing 5. The conductive piece 4 and the C-shaped connecting piece 501 are fixedly connected by a bolt 503 passing through the insulating terminal housing 5 and a threaded nut. A wire 502 is fixedly connected to the middle of the front end of the C-shaped connecting piece 501. The front end of the wire 502 extends to the outside through the insulating terminal housing 5. The conductive piece 4, by inserting into the C-shaped connecting piece 501 inside the insulating terminal housing 5 and being fixedly connected by bolts 503 and nuts, achieves a reliable connection between the heating unit and the external power supply. The wire 502 is responsible for transmitting electrical energy to the heating unit, enabling it to operate normally.

[0026] Working Principle: During use, the modular assembly of the middle PTC heater unit 1, the top PTC heater unit 101, and the bottom PTC heater unit 102 is achieved through the insertion design of the rectangular connector 2 and the U-shaped connector 201, along with the tightening effect of the extended screw 204. During assembly, the rectangular connector 2 at the lower end of each heating unit is precisely inserted into the rectangular slot 202 of the U-shaped connector 201 at the upper end of the adjacent heating unit. The limiting piece 203 ensures the connector is securely aligned and prevents it from falling off. Subsequently, the extended screw 204 is passed through the pre-drilled holes in the rectangular connector 2 and the U-shaped connector 201 for tightening, forming a tight and easily disassembled integrated structure. When the heater is in operation, electrical energy is conducted to the connecting piece 3 through the conductive piece 4. The conductive piece 4 is inserted into the C-shaped connecting piece 501 inside the insulating terminal housing 5, and the bolt 503 penetrates the insulating terminal housing 5 to make close contact with the C-shaped connecting piece 501. Finally, the bolt is tightened with a nut to ensure a safe and reliable electrical connection. This design not only enhances the stability of current transmission but also effectively isolates the current from the external environment through the insulated terminal housing 5, improving operational safety. When a heating unit needs repair or replacement, the operator only needs to loosen the corresponding extension screw 204 to easily separate the problematic heating unit. This modular design greatly simplifies the maintenance process, reduces maintenance costs, and improves the overall flexibility and maintainability of the heater.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A PTC heater structure, comprising a middle PTC heater unit (1), a top PTC heater unit (101), and a bottom PTC heater unit (102), characterized in that: Two PTC heater units (1) are vertically aligned. The upper end of the upper PTC heater unit (1) is connected to a top PTC heater unit (101), and the lower end of the lower PTC heater unit (1) is connected to a bottom PTC heater unit (102). Rectangular connectors (2) are fixedly connected to the lower middle and lower sides of the two PTC heater units (1) and the top PTC heater unit (101). U-shaped connectors (201) are fixedly connected to the upper middle and upper sides of the two PTC heater units (1) and the bottom PTC heater unit (102). Connecting pieces (3) are fixedly connected to the lower end of one side of the PTC heater unit (1), the top PTC heater unit (101), and the bottom PTC heater unit (102). Conductive pieces (4) are fixedly connected to the front end of the connecting pieces (3).

2. The PTC heater structure according to claim 1, characterized in that: Each of the U-shaped connectors (201) has a rectangular slot (202) inside, and a limiting piece (203) is fixedly connected to the rear end of each of the U-shaped connectors (201).

3. The PTC heater structure according to claim 2, characterized in that: The three rectangular connectors (2) on the upper middle PTC heater unit (1) are respectively inserted into the rectangular slots (202) of the three U-shaped connectors (201) on the lower middle PTC heater unit (1). The three rectangular connectors (2) on the top PTC heater unit (101) are respectively inserted into the rectangular slots (202) of the three U-shaped connectors (201) on the upper middle PTC heater unit (1). The three rectangular connectors (2) on the lower middle PTC heater unit (1) are respectively inserted into the rectangular slots (202) of the three U-shaped connectors (201) on the bottom PTC heater unit (102).

4. The PTC heater structure according to claim 3, characterized in that: The three rectangular connectors (2) between the two middle PTC heater units (1), between the top PTC heater unit (101) and the upper middle PTC heater unit (1), and between the lower middle PTC heater unit (1) and the bottom PTC heater unit (102) are respectively inserted into three U-shaped connectors (201) and then fixedly connected by an extension screw (204).

5. The PTC heater structure according to claim 1, characterized in that: The conductive sheet (4) is connected to an insulating terminal housing (5) on the outside. A C-shaped connecting piece (501) is fixedly installed inside the insulating terminal housing (5). The conductive sheet (4) is inserted into the inside of the C-shaped connecting piece (501) inside the insulating terminal housing (5).

6. A PTC heater structure according to claim 5, characterized in that: The conductive sheet (4) and the C-type connecting sheet (501) are fixed by a bolt (503) through the threaded connection nut of the insulating terminal housing (5).

7. A PTC heater structure according to claim 6, characterized in that: A wire (502) is fixedly connected to the middle of the front end of the C-shaped connecting piece (501), and the front end of the wire (502) extends to the outside through the insulating terminal housing (5).

Images