CN219042001U

CN219042001U - Annular PTC heater for machine

Info

Publication number: CN219042001U
Application number: CN202223036963.6U
Authority: CN
Inventors: 李涛; 魏哲; 乔柯柯; 傅慧祥; 秦江林
Original assignee: Wuhan Hitrusty Electronics Co ltd
Current assignee: Wuhan Hitrusty Electronics Co ltd
Priority date: 2022-11-15
Filing date: 2022-11-15
Publication date: 2023-05-16
Anticipated expiration: 2032-11-15

Abstract

The utility model discloses an annular PTC heater for a machine. It comprises a shell, a heating piece and a screw; the shell and the heating piece are all in an annular structure; the heating element is arranged in the shell; the screw is positioned on the shell; the heating piece comprises a PTC heating piece, an annular electrode piece, a high-temperature insulating film, a high-temperature wire and a high-temperature heat shrinkage pipe; the PTC heating piece is arranged on the heating piece; the PTC heating piece is a heating element in the heating piece; the upper and lower surfaces of the PTC heating plate are respectively coated with an annular electrode plate, the other side surface of the annular electrode plate is coated with a high-temperature insulating film, the end head of the annular electrode plate is connected with a high-temperature wire, and the root of the high-temperature wire is sleeved with a high-temperature heat shrink tube. The utility model solves the problems of weak structure, low safety performance and uneven heating caused by the fact that a plurality of PTC heating sheets are directly attached to a heated surface to be directly heated in the prior art; the device has the advantages of thin thickness, light weight, firm structure, high reliability, good heating uniformity and excellent safety performance.

Description

Annular PTC heater for machine

Technical Field

The utility model relates to the technical field of low-temperature fixed-point heating, in particular to an annular PTC heater for a machine.

Background

With the progress and innovation of technology, the PTC (PTC (Positive Temperature Coefficient) thermistor, commonly referred to as a positive temperature coefficient thermistor) heater has the advantages of small thermal resistance, high heat exchange efficiency, automatic constant temperature, power saving and the like, is particularly outstanding in safety performance, can not generate the phenomenon of reddening on the surface of other electrothermal tube type heaters under any application conditions, thereby causing potential safety hazards such as scalding and fire disaster, and is widely applied to the technical field of low-temperature fixed-point heating (such as aircraft defrosting, radio station display screen heating, key component fixed-point heating and the like under low temperature (-55-0 ℃)).

In the prior art, a plurality of PTC heating plates are directly attached to a heated surface to be directly heated (as shown in figure 1), lead connection adopts a welding mode, the current is large when the heating plates are started, and the lead is easy to fall off; the temperature of the heating plate is higher, the temperature of the heating plate-free position is lower, the structure is not firm, the safety performance is not high, and the heating is uneven.

Therefore, it is necessary to develop a PTC heater which has a stable structure, high safety, and uniform heating.

Disclosure of Invention

The utility model aims to provide the annular PTC heater for the machine, which has the advantages of thin thickness, light weight, firm structure, high reliability, good heating uniformity and excellent safety performance; the problems that in the prior art, a plurality of PTC heating plates are directly attached to a heated surface to be directly heated, the structure is not firm, the safety performance is not high, and the heating is not uniform are solved.

In order to achieve the above purpose, the technical scheme of the utility model is as follows: an annular PTC heater for a machine, characterized in that: comprises a shell, a heating piece and a screw; the shell and the heating piece are all in an annular structure;

the heating element is arranged in the shell; the screw is positioned on the shell;

the heating piece comprises a PTC heating piece, an annular electrode piece, a high-temperature insulating film, a high-temperature wire and a high-temperature heat shrinkage pipe;

the PTC heating piece is arranged on the heating piece; the PTC heating piece is a heating element in the heating piece;

the upper and lower surfaces of the PTC heating plate are respectively coated with an annular electrode plate, the other side surface of the annular electrode plate is coated with a high-temperature insulating film, the end head of the annular electrode plate is connected with a high-temperature wire, and the root of the high-temperature wire is sleeved with a high-temperature heat shrink tube for heating.

In the technical scheme, the shell comprises a lower shell, an upper shell, an electrode slice-shaped groove and a wire guide;

the electrode slice shape grooves are respectively positioned on the inner walls of the lower shell and the upper shell, and the inner walls of the upper shell and the lower shell are provided with grooves for fixing the heating element;

screw holes and mounting holes are formed in the lower shell, the upper shell and the electrode slice-shaped grooves, and screws penetrate through the mounting holes, fix the lower shell, the upper shell, the electrode slice-shaped grooves and the PTC heating slices; the screw passes through the threaded hole to fix the lower shell and the upper shell;

the wire guide is provided on the upper case for guiding out the high temperature wire.

In the technical scheme, four threaded holes and four mounting holes are formed in the lower shell, the upper shell and the electrode slice-shaped grooves, so that structural stability is guaranteed.

In the technical scheme, the heating element is embedded into the electrode slice-shaped groove and is used for fixing the heating element;

the high-temperature wire is led out through the wire guide hole and is used for connecting a power supply.

In the technical scheme, the PTC heating plate is round;

the PTC heating plates are multiple; the PTC heating plates are arranged at intervals and are positioned in the electrode plate-shaped grooves; the PTC heating pieces are arranged on the inner wall of the heating piece at intervals, the arrangement positions of the PTC heating pieces are matched with the shape of the electrode piece-shaped groove, and the heating piece is conveniently embedded in the electrode piece-shaped groove to fix the heating piece.

In the technical scheme, the shell is made of aluminum alloy materials.

The utility model is applied to the aircraft wing sensor.

Compared with the prior art, the utility model has the following advantages:

(1) The annular PTC heater for the machine adopts an integral combined heating mode, has firm structure, high safety performance and good heating uniformity; the defects of weak structure, low safety performance and uneven heating of the prior art that a plurality of heating sheets are commonly adopted to directly attach and heat the heated surface are overcome;

(2) The shell of the annular PTC heater for the machine is made of aluminum alloy, is light in weight, is thin in shell thickness, and is difficult to process due to the fact that electrode plate-shaped grooves, threaded holes and mounting holes are milled in the thickness direction of the upper shell and the lower shell;

(3) The annular PTC heater for the machine adopts a mode of reserving mounting holes, is convenient to use and mount, and has a firm structure.

Drawings

Fig. 1 is a schematic view showing the working structure of a PTC heating sheet according to the prior art.

Fig. 2 is an overall structural view of the present utility model.

Fig. 3 is an exploded view of fig. 2.

Fig. 4 is a structural view of the heating element of the present utility model.

Fig. 5 is a schematic view showing an operation structure of the ring-shaped PTC heater of the present utility model.

A in fig. 1 represents a heated surface; b1 represents a heating plate of the prior art; c represents the connecting wires between the prior art heater blades.

FIG. 5A shows a heated surface; b2 represents the annular PTC heater according to the present utility model.

In the figure, 1-shell, 1.1-lower shell, 1.2-upper shell, 1.3-threaded hole, 1.4-mounting hole, 1.5-electrode plate-shaped groove, 1.6-wire guide, 2-heating piece, 2.1-PTC heating piece, 2.2-annular electrode plate, 2.3-high-temperature heat shrinkage tube, 2.4-high-temperature wire and 3-screw.

Detailed Description

The following detailed description of the utility model is, therefore, not to be taken in a limiting sense, but is made merely by way of example. While making the advantages of the present utility model clearer and more readily understood by way of illustration.

As can be seen with reference to the accompanying drawings: an annular PTC heater for a machine comprises a shell 1, a heating element 2 and a screw 3, wherein the shell is formed by fixing a lower shell 1.1 and an upper shell 1.2 through the screw 3, and the heating element 2 is arranged in the shell 1 (shown in figures 2 and 3); the heater adopts an integral combined heating mode, has firm structure, good safety performance and good heating uniformity.

Further, the shell 1 is made of aluminum alloy, the shell 1 comprises a lower shell 1.1 and an upper shell 1.2, four threaded holes 1.3 and four mounting holes 1.4 are distributed on the surface of the shell 1, and electrode plate-shaped grooves 1.5 (shown in fig. 3) are milled in the lower shell 1.1 and the upper shell 1.2, so that the electrode plate-shaped grooves are convenient to use and install.

Still further, heating piece 2 includes PTC heating plate 2.1, annular electrode piece 2.2, high temperature insulating film, high temperature wire 2.4 and high temperature heat shrinkage pipe 2.3, heating piece 2 imbeds in shell 1 recess 1.5, the upper and lower surface subsides of PTC heating plate 2.1 has annular electrode piece 2.2, annular electrode piece 2.2 another side subsides cover high temperature insulating film, annular electrode piece 2.2 end connection high temperature wire 2.4, high temperature wire 2.4 root cover has high temperature heat shrinkage pipe 2.3, high temperature wire 2.4 is drawn forth through wire guide 1.6 (as shown in fig. 4).

The using method of the annular PTC heater for the machine comprises the following steps: the present utility model is placed on the surface of a heated member (as shown in fig. 5).

Examples

The annular PTC heater for the machine comprises a shell 1, a heating element 2 and a screw 3, wherein the shell is formed by fixing a lower shell 1.1 and an upper shell 1.2 through the screw 3, the heating element 2 is arranged in the shell 1, and the total weight of the heater is not more than 50g.

The shell 1 is made of aluminum alloy materials, conducts heat and is light in weight (as shown in fig. 3), the shell 1 comprises a lower shell 1.1 and an upper shell 1.2, four threaded holes 1.3 and four mounting holes 1.4 are distributed on the surface of the shell 1, electrode plate-shaped grooves 1.5 are milled in the lower shell 1.1 and the upper shell 1.2, the size of the shell 1 is phi 60 multiplied by 33, and the thickness of the shell 1 is not more than 3.5mm.

The heating piece 2 comprises a PTC heating piece 2.1, an annular electrode piece 2.2, a high-temperature insulating film, a high-temperature lead 2.4 and a high-temperature heat shrinkage tube 2.3, wherein the heating piece 2 is embedded into a groove 1.5 of the shell 1, the annular electrode piece 2.2 is stuck on the upper surface and the lower surface of the PTC heating piece 2.1, the other side surface of the annular electrode piece 2.2 is stuck with the high-temperature insulating film, the end head of the annular electrode piece 2.2 is connected with the high-temperature lead 2.4, the root of the high-temperature lead 2.4 is sleeved with the high-temperature heat shrinkage tube 2.3, and the high-temperature lead 2.4 is led out through a lead hole 1.6 (shown in figure 4).

Conclusion: the annular PTC heater for the machine in the embodiment adopts a mode of integrally combining heating and reserving mounting holes, is convenient to use and mount, and has firm structure, high safety performance and good heating uniformity; the electrode plate-shaped groove is milled in the thin shell, so that the processing difficulty is low.

Other non-illustrated parts are known in the art.

Claims

1. An annular PTC heater for a machine, characterized in that: comprises a shell (1), a heating piece (2) and a screw (3); the shell (1) and the heating element (2) are of annular structures;

the heating element (2) is arranged in the shell (1); the screw (3) is positioned on the shell (1);

the heating piece (2) comprises a PTC heating piece (2.1), an annular electrode piece (2.2), a high-temperature insulating film, a high-temperature wire (2.4) and a high-temperature heat shrinkage tube (2.3);

the upper surface and the lower surface of the PTC heating sheet (2.1) are respectively coated with an annular electrode sheet (2.2), the other side surface of the annular electrode sheet (2.2) is coated with a high-temperature insulating film, the end head of the annular electrode sheet (2.2) is connected with a high-temperature wire (2.4), and the root part of the high-temperature wire (2.4) is sleeved with a high-temperature heat shrinkage tube (2.3).

2. A circular PTC heater for a machine according to claim 1, wherein: the shell (1) comprises a lower shell (1.1), an upper shell (1.2), electrode slice-shaped grooves (1.5) and a wire guide (1.6);

the electrode slice shape grooves (1.5) are respectively positioned on the inner walls of the lower shell (1.1) and the upper shell (1.2);

screw holes (1.3) and mounting holes (1.4) are formed in the lower shell (1.1), the upper shell (1.2) and the electrode slice-shaped grooves (1.5);

the wire guide (1.6) is arranged on the upper shell (1.2).

3. A circular PTC heater for a machine according to claim 2, wherein: four threaded holes (1.3) and four mounting holes (1.4) are respectively arranged on the lower shell (1.1), the upper shell (1.2) and the electrode slice-shaped groove (1.5); the threaded holes (1.3) are arranged at intervals with the mounting holes (1.4).

4. A circular PTC heater for a machine according to claim 3 wherein: the heating piece (2) is embedded into the electrode slice-shaped groove (1.5);

the high-temperature wires (2.4) are led out through the wire guide (1.6).

5. A circular PTC heater for a machine according to claim 4 wherein: the PTC heating piece (2.1) is round;

the PTC heating sheets (2.1) are provided in plurality; the PTC heating plates (2.1) are arranged at intervals and are all positioned in the electrode plate-shaped grooves (1.5).