Annular PTC heater

Abstract

The utility model relates to the technical field of PTC (Positive Temperature Coefficient) heaters, in particular to an annular PTC heater, which comprises two aluminum corrugated radiating rings and a plurality of PTC heating ceramics which are annularly distributed, the two aluminum corrugated radiating rings are distributed up and down, aluminum corrugated radiating fins are arranged in the middles of the interiors of the aluminum corrugated radiating rings, and the PTC heating ceramics are arranged in the aluminum corrugated radiating rings. A plurality of limiting protrusions I are arranged on the lower end face of the upper aluminum corrugated heat dissipation ring at intervals, the PTC heating ceramic is located between the two aluminum corrugated heat dissipation rings, upper limiting grooves matched with the limiting protrusions I are formed in the upper end face of the PTC heating ceramic, and a plurality of limiting protrusions II are arranged on the upper end face of the lower aluminum corrugated heat dissipation ring at intervals. The PTC heating ceramic and the aluminum corrugated heat dissipation ring are simple and convenient to disassemble and reassemble, so that aged and damaged accessories can be conveniently and independently replaced and treated, and the later use and maintenance cost can be favorably reduced.

Description

Technical Field

[0001] This utility model relates to the field of PTC heater technology, specifically to a ring-shaped PTC heater. Background Technology

[0002] PTC heaters, also known as PTC heating elements, are composed of PTC ceramic heating elements and aluminum tubes. They are automatic temperature-controlled and energy-saving electric heaters. PTC heating elements have the advantages of low thermal resistance and high heat exchange efficiency. They are mainly used in air conditioners, air curtains, dehumidifiers, dryers, clothes dryers, heaters, automobiles and other equipment that need to provide warm air.

[0003] According to the search, the Chinese patent grant announcement number is CN 217685874. A ring-shaped PTC air heater disclosed in the U.S. consists of several PTC heating ceramics placed between two aluminum corrugated heat dissipation rings of the same size. These rings are bonded and cured with conductive adhesive to form the ring-shaped PTC air heater. During use, a turbine-type centrifugal fan is placed in the inner ring of the heater. When the fan rotates, airflow enters through the center inlet of the turbine-type centrifugal fan, generating strong centrifugal force. The airflow is then rapidly thrown outwards by the fan blades towards the outer aluminum corrugated heat dissipation rings. As the airflow passes through the gaps in the heat dissipation fins on the aluminum corrugated heat dissipation rings, it carries away the heat from the ring-shaped PTC air heater, thus achieving all-around heating and allowing multiple people to be heated simultaneously. However, during long-term use, the PTC heating ceramics or the aluminum corrugated heat dissipation rings may age and become damaged. Because the PTC heating ceramics and aluminum corrugated heat dissipation rings are fixed with conductive adhesive, disassembly and reassembly are difficult, making it hard to replace aged or damaged parts individually. Usually, the entire heater needs to be replaced, increasing future maintenance costs. Therefore, we propose a ring-shaped PTC heater to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a ring-shaped PTC heater to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A ring-shaped PTC heater includes two corrugated aluminum heat dissipation rings and a plurality of PTC heating ceramics arranged in a ring. The two corrugated aluminum heat dissipation rings are arranged vertically, and corrugated aluminum heat dissipation fins are disposed in the middle of the interior of each ring. The lower end face of the upper ring has a plurality of limiting protrusions I spaced apart. The PTC heating ceramics are located between the two rings. The upper end face of the PTC heating ceramics has an upper limiting groove adapted to the limiting protrusions I. The upper end face of the lower ring has a plurality of limiting protrusions II spaced apart. The lower end face of the PTC heating ceramics has a lower limiting groove adapted to the limiting protrusions II. An inner block is disposed inside the port of the upper ring, and an outer block is disposed outside the port of the lower ring. A screw assembly is threadedly connected between the inner and outer blocks, and the opposite sides of the inner and outer blocks are in contact.

[0007] Preferably, the upper aluminum corrugated heat dissipation ring and the limiting protrusion I are integrally formed, and the lower aluminum corrugated heat dissipation ring and the limiting protrusion II are integrally formed.

[0008] Preferably, the screw assembly includes two fastening screws, which are symmetrically distributed.

[0009] Preferably, the outer side of the outer block has a countersunk groove, and the end cap of the fastening screw is located in the countersunk groove.

[0010] Preferably, a first connecting wire is welded to the upper end face of the upper aluminum corrugated heat dissipation ring, and a second connecting wire is welded to the lower end face of the lower aluminum corrugated heat dissipation ring.

[0011] Preferably, the upper and lower end faces of the inner block are flush with the upper and lower end faces of the outer block, respectively.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention involves inserting the limiting protrusion II into the lower limiting groove on the lower end face of the PTC heating ceramic, and inserting the limiting protrusion I into the upper limiting groove on the upper end face of the PTC heating ceramic. The inner and outer blocks are in contact with each other. By tightening the screw assembly on the inner and outer blocks, the PTC heating ceramic and the aluminum corrugated heat sink ring can be reassembled to form a ring-shaped PTC heater. This replaces the conductive adhesive bonding method for fixing the PTC heating ceramic and the aluminum corrugated heat sink ring, making disassembly and reassembly simple and convenient. This facilitates the individual replacement of aged and damaged parts without replacing the entire heater, which helps reduce the later use and maintenance costs. Attached Figure Description

[0014] Figure 1This is a three-dimensional structural diagram of a ring-shaped PTC heater according to the present invention;

[0015] Figure 2 This is a three-dimensional structural diagram of the upper aluminum corrugated heat dissipation ring in a ring-shaped PTC heater according to the present invention.

[0016] Figure 3 This is a three-dimensional structural diagram of the lower aluminum corrugated heat dissipation ring in a ring-shaped PTC heater according to the present invention.

[0017] Figure 4 This is a cross-sectional view of a ring-shaped PTC heater according to the present invention.

[0018] In the figure: 1. Aluminum corrugated heat sink ring; 101. Limiting protrusion I; 102. Limiting protrusion II; 103. First connecting wire; 104. Second connecting wire; 2. PTC heating ceramic; 201. Upper limit groove; 202. Lower limit groove; 3. Aluminum corrugated heat sink; 4. Inner block; 5. Outer block; 501. Countersunk groove; 6. Screw assembly. Detailed Implementation

[0019] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-4 As shown, this utility model provides a technical solution:

[0021] A ring-shaped PTC heater includes two corrugated aluminum heat dissipation rings 1 and a plurality of PTC heating ceramics 2 arranged in a ring. The two corrugated aluminum heat dissipation rings 1 are arranged vertically, and a corrugated aluminum heat dissipation fin 3 is disposed in the middle of the interior of each ring. A plurality of limiting protrusions I101 are spaced apart on the lower end face of the upper ring 1. The PTC heating ceramics 2 are located between the two corrugated aluminum heat dissipation rings 1. An upper limit groove 201 adapted to the limiting protrusions I101 is formed on the upper end face of each PTC heating ceramic 2, so that the limiting protrusions I101 can be inserted into the upper limit groove 201. The lower corrugated aluminum heat dissipation rings 1 and the PTC heating ceramics 2 are arranged in a ring. The upper end face of the heat ring 1 is provided with several limiting protrusions II102 at intervals. The lower end face of the PTC heating ceramic 2 is provided with a lower limiting groove 202 that is adapted to the limiting protrusions II102, so that the limiting protrusions II102 can be inserted into the lower limiting groove 202. An inner block 4 is provided on the inner side of the upper aluminum corrugated heat dissipation ring 1 port, and an outer block 5 is provided on the outer side of the lower aluminum corrugated heat dissipation ring 1 port. A screw assembly 6 is threadedly connected between the inner block 4 and the outer block 5. The opposite sides of the inner block 4 and the outer block 5 are in contact, which helps to improve the overall structural stability of the two aluminum corrugated heat dissipation rings 1 after combination.

[0022] As a preferred embodiment of this example, Figure 2 and Figure 3 As shown, the upper aluminum corrugated heat dissipation ring 1 and the limiting protrusion I101 are integrally formed, and the lower aluminum corrugated heat dissipation ring 1 and the limiting protrusion II102 are integrally formed.

[0023] As a preferred embodiment of this example, Figure 1 As shown, the screw assembly 6 includes two fastening screws, which are symmetrically distributed.

[0024] As a preferred embodiment of this example, Figure 3 As shown, a countersunk groove 501 is provided on the side of the outer block 5, and the end cap of the fastening screw is located in the countersunk groove 501, which achieves the purpose of hiding the fastening screw.

[0025] As a preferred embodiment of this example, Figure 1 As shown, a first connecting wire 103 is welded to the upper end face of the upper aluminum corrugated heat dissipation ring 1, and a second connecting wire 104 is welded to the lower end face of the lower aluminum corrugated heat dissipation ring 1. An external power supply can be connected to the first connecting wire 103 and the second connecting wire 104 for power supply.

[0026] As a preferred embodiment of this example, Figure 2 As shown, the upper and lower end faces of the inner block 4 are flush with the upper and lower end faces of the outer block 5, thus ensuring the overall appearance.

[0027] Working principle:

[0028] During the use of this annular PTC heater, a turbine centrifugal fan is installed in the inner ring of the heater. When the turbine centrifugal fan rotates, the airflow enters through the center port of the turbine centrifugal fan, generates centrifugal force, and is quickly thrown out by the fan blades towards the aluminum corrugated heat sink ring 1. When the airflow flows through the gaps of the aluminum corrugated heat sink 3 on the aluminum corrugated heat sink ring 1, it can carry away the heat generated by each PTC heating ceramic 2. If the PTC heating ceramic 2 or the aluminum corrugated heat sink ring 1 is aged or damaged, the screw assembly 6 on the inner block 4 and the outer block 5 is loosened, so that the limiting protrusion I101 is pulled upward along the upper limit groove 201 on the upper end face of the PTC heating ceramic 2. Part II102 is pulled upward along the lower limit groove 202 on the lower end face of the PTC heating ceramic 2, so that each PTC heating ceramic 2 and aluminum corrugated heat sink ring 1 can be separated, making it easy to replace and handle aged and damaged parts individually. After the parts are replaced, the limiting protrusion II102 is inserted into the lower limit groove 202 on the lower end face of the PTC heating ceramic 2, and the limiting protrusion I101 is inserted into the upper limit groove 201 on the upper end face of the PTC heating ceramic 2. The inner side block 4 and the outer side block 5 are in contact with each other. Tighten the screw assembly 6 on the inner side block 4 and the outer side block 5, and the PTC heating ceramic 2 and aluminum corrugated heat sink ring 1 can be reassembled to form a ring PTC heater.

[0029] The foregoing has shown and described the principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A ring-shaped PTC heater, comprising two aluminum corrugated heat dissipation rings (1) and a plurality of PTC heat generating ceramics (2) in a ring-shaped distribution, the two aluminum corrugated heat dissipation rings (1) being in an up-down distribution, an aluminum corrugated heat dissipation sheet (3) being arranged in the middle of the inside of the aluminum corrugated heat dissipation ring (1), characterized in that: The upper aluminum corrugated heat dissipation ring (1) is provided with a plurality of limiting protrusions I (101) at the lower end surface, the PTC heat generating ceramic (2) is located between the two aluminum corrugated heat dissipation rings (1), and the upper end surface of the PTC heat generating ceramic (2) is provided with an upper limiting groove (201) matched with the limiting protrusions I (101). The lower aluminum corrugated heat dissipation ring (1) is provided with a plurality of limiting protrusions II (102) at the upper end surface, and the lower end surface of the PTC heat generating ceramic (2) is provided with a lower limiting groove (202) matched with the limiting protrusions II (102).

2. A ring PTC heater according to claim 1, characterized in that: The upper aluminum corrugated heat dissipation ring (1) is provided with a plurality of limiting protrusions I (101) at the lower end surface, the PTC heat generating ceramic (2) is located between the two aluminum corrugated heat dissipation rings (1), and the upper end surface of the PTC heat generating ceramic (2) is provided with an upper limiting groove (201) matched with the limiting protrusions I (101).

3. A ring PTC heater according to claim 1, characterized in that: The upper aluminum corrugated heat dissipation ring (1) is provided with a plurality of limiting protrusions I (101) at the lower end surface, the PTC heat generating ceramic (2) is located between the two aluminum corrugated heat dissipation rings (1), and the upper end surface of the PTC heat generating ceramic (2) is provided with an upper limiting groove (201) matched with the limiting protrusions I (101).

4. A ring PTC heater according to claim 3, characterized in that: The screw assembly (6) comprises two fastening screws, and the two fastening screws are symmetrically distributed.

5. A ring PTC heater according to claim 1, characterized in that: The side surface of the outer block (5) is provided with a counterbore groove (501), and the end cap portion of the fastening screw is located in the counterbore groove (501).

6. A ring PTC heater according to claim 1, characterized in that: The upper aluminum corrugated heat dissipation ring (1) is provided with a plurality of limiting protrusions I (101) at the lower end surface, the PTC heat generating ceramic (2) is located between the two aluminum corrugated heat dissipation rings (1), and the upper end surface of the PTC heat generating ceramic (2) is provided with an upper limiting groove (201) matched with the limiting protrusions I (101). The upper and lower end surfaces of the inner block (4) are flush with the upper and lower end surfaces of the outer block (5), respectively.

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