A hot air gun heating core

Abstract

The utility model relates to hot -blast gun technical field especially relates to a hot -blast gun heating core, including base frame, support, heating wire and limit support: the base frame includes a plurality of base plates along the circumferential interval arrangement, every base plate all is set up with a plurality of first clamping port, the support number is a plurality, every support all clamps and sets up between two adjacent base plates and all set up with second clamping port, the heating wire is around set up on the base frame and is clamped into first clamping port and second clamping port, the limit support is fixed on the base frame downstream side along the airflow flow direction and is used for the location of support, the utility model discloses the limit support fixed on the base frame to the axial location of support, can avoid the misplacement of heating wire caused by the relative displacement between support and base frame, thereby improved the position accuracy of heating wire, can avoid the short circuit phenomenon and the uneven heating phenomenon caused by the contact of two adjacent circle heating wire.

Description

Technical Field

[0001] This utility model relates to the field of hot air gun technology, and in particular to a heating element for a hot air gun. Background Technology

[0002] The core working components of a hot air gun typically include a heating element and an air supply device. The heating element mainly consists of a heating wire and its supporting structure. Specifically, when the hot air gun is in operation, the internal air supply device (such as a fan) generates airflow. This airflow passes through the electrically heated heating wire, is heated, and then blown out from the nozzle to form a hot airflow for the operation.

[0003] However, the heating wire reaches temperatures of several hundred degrees Celsius after being energized. At this high temperature, its mechanical strength decreases significantly, resulting in a phenomenon called "high-temperature softening." At this point, the continuously flowing airflow exerts a sustained hydrodynamic force (i.e., "blowing action") on the softened heating wire. This force causes the heating wire to tend to move or deform along the airflow direction. Under the long-term, continuous thrust of the heating wire, the ceramic support used to fix and define its position will gradually experience slight displacement, loosening, or even deflection. This means a relative displacement occurs between the ceramic support and the base frame, leading to misalignment of the heating wire. This can easily cause adjacent heating wires to come into contact, forming a localized short circuit. This can not only instantly burn out the heating wire but also damage the power control circuit and even cause a fire. Furthermore, abnormal contact or deformation of the heating wire can cause changes in its local resistance, resulting in uneven heating, unstable hot air output, and affecting operational efficiency. In severe cases, it can cause the heating wire to overheat and melt, rendering the equipment completely inoperable. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to solve the problem that the heating wire in the hot air gun softens after long-term heating, which in turn exerts a pushing force on the ceramic support, causing relative displacement between the ceramic support and the base frame, resulting in misalignment of the heating wire, which can easily lead to contact between adjacent heating wires and form a local short circuit, a heating core for a hot air gun is provided.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a heating element for a hot air gun, comprising: The base frame includes a plurality of substrates arranged at intervals along the circumference, and each substrate is provided with a plurality of first slots; There are several brackets, each bracket is snapped between two adjacent base plates and each bracket has a second slot; A heating wire is wound around the base frame and snapped into the first and second slots; and a limiting frame, which is fixed to the downstream side of the base frame along the airflow direction and is used to limit the support.

[0006] Furthermore, the limiting frame extends axially to form a plurality of blocking parts, each blocking part being engaged between two adjacent substrates, the plurality of blocking parts corresponding one-to-one with a plurality of supports, and each blocking part being used to block its corresponding support.

[0007] Furthermore, the blocking portion extends radially to one end of its corresponding bracket and forms an abutment portion.

[0008] Furthermore, the connection between the abutment and the blocking part is provided with a flow port for airflow.

[0009] Furthermore, the limiting frame extends radially to form a plurality of limiting strips, each limiting strip corresponding to a plurality of substrates, and each limiting strip engaging with its corresponding substrate.

[0010] Furthermore, the radial extension length of the limiting strip is less than the radial extension length of the substrate.

[0011] Furthermore, the limiting frame also includes a base for connecting the blocking part and the limiting strip.

[0012] The beneficial effects of this utility model are as follows: This utility model uses a limiting frame fixed on the base frame to axially limit the support, which can avoid the misalignment of the heating wire caused by the relative displacement between the support and the base frame, thereby improving the positional accuracy of the heating wire and avoiding short circuits and uneven heating caused by contact between adjacent heating wires. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is the front view of this utility model; Figure 3 This is a side view of the present invention; Figure 4 This is a schematic diagram of the structure of this utility model after the heating wire has been removed; Figure 5 This is a three-dimensional schematic diagram of the limiting frame from a first-person perspective in this utility model; Figure 6 This is a three-dimensional schematic diagram of the limiting frame from a second perspective in this utility model; Figure 7 This is a side view of the limiting frame in this utility model; In the picture: 1. Base frame; 101. Substrate; 102. First bayonet; 2. Bracket; 201. Second bayonet; 3. Heating wire; 4. Limiting frame; 401. Blocking part; 402. Abutting part; 403. Flow port; 404. Limiting strip; 405. Base. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention. Therefore, they only show the components, orientations, and references (e.g., up, down, left, right, etc.) relevant to the present invention and are intended only to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0016] like Figures 1-7 As shown, a heating element for a hot air gun includes: The base frame 1 includes a plurality of substrates 101 arranged circumferentially, and a flow space for airflow is formed between adjacent substrates 101. Each substrate 101 has a plurality of first slots 102 on its outer side. The plurality of first slots 102 on each substrate 101 are arranged at intervals along the length direction (i.e., axial direction) of the substrate 101. Each first slot 102 is approximately V-shaped, and the first slots 102 on several substrates 101 are arranged in a spiral. There are several brackets 2. Each bracket 2 is clamped between two adjacent base plates 101 and has several second slots 201 on its outer side. The several second slots 201 are arranged at intervals along the length direction (i.e., axial direction) of the bracket 2. Each second slot 201 is roughly U-shaped and the second slots 201 on the brackets 2 are arranged in a spiral. The heating wire 3 is wound around the base frame 1 and snapped into the first snap 102 and the second snap 201. The heating wire 3 is spiral and extends spirally along the axis of the base frame 1. Correspondingly, the first snap 102 and the second snap 201 are both located on the extension trajectory of the heating wire 3, and the first snap 102 and the second snap 201 are arranged at intervals. A limiting frame 4 is fixed to the downstream side of the base frame 1 along the airflow direction and is used to limit the support 2. After the heating wire 3 is energized, it gradually heats up. The airflow is gradually heated after passing through the heating wire 3 and then ejected. The part of the heating wire 3 located within the first latch 102 and the second latch 201 is limited, but the part located between the first latch 102 and the second latch 201 has a certain degree of freedom. When the heating wire 3 gradually softens, part of the heating wire (i.e., the part located between the first latch 102 and the second latch 201) is freed. The heating wires (between 01 and 01) tend to move forward under the influence of airflow, which will exert a certain thrust on the support 2. If the support 2 is displaced under its action, the first latch 102 and the second latch 201 will not be arranged in a spiral, and the heating wires 3 will be misaligned or come out of the first latch 102 and the second latch 201, which will easily cause adjacent heating wires 3 to come into contact with each other. The limiting frame 4 in this application can limit the support 2 to prevent it from moving forward and avoid its unexpected movement.

[0017] This embodiment uses a limiting frame 4 fixed on the base frame 1 to axially limit the support 2, which can avoid the misalignment of the heating wire 3 caused by the relative displacement between the support 2 and the base frame 1, thereby improving the positional accuracy of the heating wire 3 and avoiding short circuits and uneven heating caused by contact between two adjacent heating wires 3.

[0018] In some examples, the limiting frame 4 extends axially to form a plurality of blocking portions 401. The axial extension length of each blocking portion 401 may be the same or different, and its axial extension length is determined according to the position of each bracket 2. The plurality of blocking portions 401 are arranged circumferentially at intervals, and each blocking portion 401 is engaged between two adjacent base plates 101. The plurality of blocking portions 401 correspond one-to-one with a plurality of brackets 2, and each blocking portion 401 is used to block its corresponding bracket 2. In this embodiment, the number of base plates 101, brackets 2, and blocking portions 401 are all six. In some examples, the blocking part 401 extends radially near one end of its corresponding bracket 2 to form an abutment part 402. The abutment part 402 increases the contact area with the bracket 2, thereby obtaining a stable supporting force. The cross-sectional area of ​​the abutment part 402 is smaller than the area of ​​the end face of the bracket 2.

[0019] In some examples, the connection between the abutment part 402 and the blocking part 401 is provided with a flow port 403 for airflow to pass through. The flow port 403 is connected to the airflow channel formed between the bracket 2 and the base frame 1, so that the airflow flowing out of the airflow channel can pass through and avoid it, so as to prevent the airflow from directly acting on the limiting frame 4 and affecting the stability of the limiting frame 4.

[0020] In some examples, the limiting frame 4 extends radially to form a plurality of limiting strips 404, each limiting strip 404 corresponding to a plurality of substrates 101, and each limiting strip 404 is snapped into its corresponding substrate 101. The limiting strip 404 is located on the end face of the substrate 101 and is stamped to cover the substrate 101 to fix the limiting frame 4. The limiting frame 4 is clamped between the base frame 1 and the outer shell by the limiting strips 404, thereby further improving the stability of the installation of the limiting frame 4. Each limiting strip 404 includes a main body that is attached to the end face of its corresponding substrate 101 and a rim (not shown in the figure) formed by bending from the main body. There are two rims, and the two rims are attached to the side of the substrate 101 to form a "U" shaped limiting strip 404.

[0021] In some examples, the radial extension length of the limiting strip 404 is less than the radial extension length of the substrate 101 to avoid interference with the installation of the housing.

[0022] In some examples, the limiting frame 4 also includes a base 405 for connecting the blocking part 401 and the limiting strip 404.

[0023] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A heating element for a hot air gun, characterized in that: include: The base frame (1) includes a plurality of substrates (101) arranged at intervals along the circumference, and each substrate (101) is provided with a plurality of first slots (102). The bracket (2) is in several units, and each bracket (2) is installed between two adjacent base plates (101) and each has a second slot (201). Heating wire (3) is wound around the base frame (1) and snapped into the first snap (102) and the second snap (201); and a limiting frame (4), which is fixed on the downstream side of the base frame (1) along the airflow direction and is used to limit the support (2).

2. The heating element of a hot air gun according to claim 1, characterized in that: The limiting frame (4) extends along the axial direction and forms a plurality of blocking parts (401). Each blocking part (401) is inserted between two adjacent substrates (101). The plurality of blocking parts (401) correspond one-to-one with a plurality of supports (2), and each blocking part (401) is used to block the support (2) it corresponds to.

3. The heating element of a hot air gun according to claim 2, characterized in that: The blocking part (401) extends radially to one end near its corresponding bracket (2) and forms an abutment part (402).

4. The heating element of a hot air gun according to claim 3, characterized in that: The connection between the contact part (402) and the blocking part (401) is provided with a flow port (403) for airflow to pass through.

5. The heating element of a hot air gun according to claim 2, characterized in that: The limiting frame (4) extends radially and forms a plurality of limiting strips (404). The plurality of limiting strips (404) correspond one-to-one with a plurality of substrates (101) and each limiting strip (404) is engaged with its corresponding substrate (101).

6. The heating element of a hot air gun according to claim 5, characterized in that: The radial extension length of the limiting strip (404) is less than the radial extension length of the substrate (101).

7. The heating element of a hot air gun according to claim 5, characterized in that: The limiting frame (4) also includes a base (405) for connecting the blocking part (401) and the limiting strip (404).

Images