CN113218078A

CN113218078A - Power unit and hot air gun

Info

Publication number: CN113218078A
Application number: CN202110386521.5A
Authority: CN
Inventors: 刘强
Original assignee: Youwei Technology Suzhou Co ltd
Current assignee: Youwei Technology Suzhou Co ltd
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2021-08-06

Abstract

The application provides a power unit and a hot air gun, wherein the hot air gun comprises a shell unit, a heating unit assembled on the shell unit and a power supply unit for supplying power to the power unit and the heating unit, the power unit comprises a support, a motor installed on the support, a fan driven by the motor and a first connecting assembly electrically connected with the motor, the motor is electrically connected to the power supply unit through the first connecting assembly, and the first connecting assembly is configured to be electrically connected with the power supply unit in a manually detachable mode; the support is provided with an air inlet and an air outlet of the fan, and the opening direction of the air inlet is perpendicular to the opening direction of the air outlet. In this application, power unit is applicable in the hot-blast rifle of difference as removable module, has improved the commonality, is favorable to reducing design cost and mould cost.

Description

Power unit and hot air gun

Technical Field

The application relates to the field of electric tools, in particular to a power unit and a hot air gun.

Background

The hot air gun is a heating tool for forming hot air flow by heating air, and has various functions such as removing a self-adhesive sticker, heating a plastic pipe to be bent, drying a wet article, and the like. The common heat gun is powered by a rechargeable power supply or an alternating current power supply, different heat guns usually adopt different motors and fans, and an air duct needs to be designed independently, so that the cost is high.

Disclosure of Invention

The application provides a low-cost power unit and hot-blast rifle.

Specifically, the present application provides a power unit for a heat gun, the heat gun including a housing unit, a heating unit assembled to the housing unit, and a power unit for supplying power to the power unit and the heating unit, the power unit including a bracket, a motor mounted to the bracket, a fan driven by the motor, and a first connecting assembly electrically connected to the motor, the motor being electrically connected to the power unit through the first connecting assembly, the first connecting assembly being configured to be electrically connected to the power unit in a manually detachable manner; the support is provided with an air inlet and an air outlet of the fan, and the opening direction of the air inlet is perpendicular to the opening direction of the air outlet.

On the other hand, this application still provides a hot-air gun, hot-air gun include the housing unit, assemble in the heating unit of housing unit and as before the power pack, the power pack with but the local mode of manual dismantlement assemble in the housing unit, just the power pack adorn in during the housing unit, the heating unit towards the air outlet, the mobile air that the power pack produced will the heat that the heating unit produced is derived.

Furthermore, the power supply unit comprises a circuit board and a rechargeable power supply electrically connected with the circuit board, and the rechargeable power supply supplies power to the motor and the heating unit through the circuit board.

Furthermore, the power supply unit comprises a circuit board and an alternating current power supply plug electrically connected with the circuit board, the circuit board comprises an alternating current-direct current conversion circuit, and the alternating current power supply plug is used for being electrically connected to an alternating current power supply.

Furthermore, the first connecting assembly comprises a first power interface electrically connected with the motor, the power supply unit comprises a second power interface and a third power interface which are electrically connected with the circuit board respectively, and the heating unit comprises a heating element and a fourth power interface electrically connected with the heating element; the first power interface is configured to be in butt joint with the second power interface so as to realize the electrical connection between the motor and the power supply unit; the fourth power interface is configured to be docked with the third power interface to electrically connect the heating element with the power supply unit.

Furthermore, the power unit comprises a first power interface and a second power interface which are electrically connected, the power unit comprises a third power interface which is electrically connected with the circuit board, the heating unit comprises a heating element and a fourth power interface which is electrically connected with the heating element, the first power interface comprises a first sub-port and a second sub-port, and the first sub-port is electrically connected with the motor; the second power interface is configured to be in butt joint with the third power interface so as to realize the electrical connection between the motor and the power supply unit; the second sub-port is configured to be docked with the fourth power interface to electrically connect the heating element with the power supply unit.

Further, the housing unit comprises a first housing half and a second housing half, the first housing half being assembled to the second housing half in a manually detachable manner; the first half shell and the second half shell form a cavity for limiting a power unit, and the power unit is limited by the first half shell and the second half shell in the radial direction and the axial direction, and the radial direction is perpendicular to the axial direction.

Furthermore, the power unit comprises a first coupling structure, the heating unit comprises a second coupling structure, and the first coupling structure is matched with the second coupling structure to realize the electrical connection and the mechanical connection of the power unit and the heating unit; the second subport is formed in the first coupling structure and the fourth power port is formed in the second coupling structure.

Further, the first coupling structure comprises a first magnet and the second sub-port, the second coupling structure comprises a second magnet and the fourth power port, and the first magnet and the second magnet attract each other to realize the mechanical connection between the power unit and the heat generating unit; the second sub-port is arranged on the surface of the power unit facing the heating unit and is positioned outside the air outlet; the fourth power interface is arranged on the surface of the heating unit facing the power unit; the second sub-port interfaces with the fourth power interface when the first magnet and the second magnet are attracted to each other.

Further, the first coupling structure comprises at least two first magnets arranged along the circumferential direction, the second coupling structure comprises at least two second magnets arranged along the circumferential direction, the first magnets correspond to the second magnets one to one, the polarities of the two first magnets are opposite, and the polarities of the two second magnets are opposite.

In this application, power unit is applicable in the hot-blast rifle of difference as removable module, has improved the commonality, is favorable to reducing design cost and mould cost.

Drawings

FIG. 1 is an exploded perspective view of one embodiment of a power unit of the present application

Fig. 2 is an exploded perspective view of the power unit shown in fig. 1.

FIG. 3 is a schematic perspective view of one embodiment of the heat gun of the present application including the power unit shown in FIG. 1.

Fig. 4 is a perspective view of the heat gun of fig. 3 with the first half removed.

Fig. 5 is a schematic circuit diagram of the units of the heat gun shown in fig. 3.

FIG. 6 is a schematic circuit diagram of the units of a heat gun according to another embodiment.

Fig. 7 is a schematic view of the surface of the power unit facing the heat generating unit of the heat gun of fig. 3.

Fig. 8 is a schematic view of the surface of the heat generating unit of the heat gun of fig. 3 facing the power unit.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used in this application, the terms "first," "second," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

The application provides a power unit, which is used for a hot air gun, wherein the hot air gun comprises a shell unit, a heating unit assembled on the shell unit and a power supply unit for supplying power to the power unit and the heating unit, the power unit comprises a bracket, a motor arranged on the bracket, a fan driven by the motor and a first connecting component electrically connected with the motor, the motor is electrically connected to the power supply unit through the first connecting component, and the first connecting component is configured to be electrically connected with the power supply unit in a manually detachable mode; the support is provided with an air inlet and an air outlet of the fan, and the opening direction of the air inlet is perpendicular to the opening direction of the air outlet.

Referring to fig. 1 and fig. 2, in the present embodiment, the power unit 1 includes a bracket 11, a motor 12 mounted on the bracket 11, a fan 13 driven by the motor 12, and a first connecting assembly 14 electrically connected to the motor 12, and the motor 12 is electrically connected to a power unit of the thermal glue gun through the first connecting assembly 14.

The bracket 11 includes a motor frame 111 and a fan housing 112 assembled together, the motor frame 111 is provided with a positioning notch 1110, and the fan housing 112 is provided with a positioning protrusion 1120 matched with the positioning notch 1110, so as to ensure the alignment accuracy of the motor frame 111 and the fan housing 112, optionally, the positioning notch 1110 and the positioning protrusion 1120 are both arranged along the circumferential direction, and the connection stability of the motor frame 111 and the fan housing 112 is ensured. The motor 12 is mounted on a motor frame 111, and the fan housing 112 is used for guiding airflow generated by the fan. Specifically, an air inlet 1121 of the fan 13 is formed between the fan 112 and the motor frame 111, and an air outlet 1122 of the fan 13 is formed in the fan cover 112. The opening of the air inlet 1121 surrounds the fan 13 for a circle; the outlet 1122 faces away from the motor 12, and the opening direction is substantially the direction of the motor shaft, so the opening direction of the inlet 1121 is perpendicular to the opening direction of the outlet 1122.

The first connection assembly 14 includes a first cable 141 electrically connected to the two

poles

121, 122 of the motor 12 and a first power interface 142 electrically connected to the first cable, the first power interface 142 is configured to be electrically connected to a power supply unit, and the first power interface 142 is configured to be electrically connected to the power supply unit in a manually detachable manner (i.e., without using a tool), so as to allow a user to quickly detach and replace the motor. For example, the first power interface 142 is an aviation plug, and the power supply unit is also configured to interface with a corresponding aviation plug.

The power unit 1 is an independent and integral unit, and can be suitable for different hot glue guns, such as a direct current hot glue gun (powered by a rechargeable power supply) and an alternating current hot glue gun (powered by an alternating current power supply), so that the universality can be improved, and an air supply structure (namely the power unit of the application) does not need to be designed for different hot glue guns. In addition, because the first power interface 142 can be directly and manually assembled and disassembled, when the air supply structure of the hot glue gun breaks down, the air supply structure can be directly replaced without complex processes such as welding, fastening and the like.

On the other hand, this application still provides a hot glue gun. Referring to fig. 3 to 4, the hot glue gun includes the power unit according to the previous embodiment. The hot glue gun further comprises a shell unit 2, a heating unit 3 assembled on the shell unit 2 and a power supply unit 4 for supplying power to the power unit 1 and the heating unit 3. The airflow generated by the power unit leads out the heat generated by the heating unit. Specifically, the housing unit includes an airflow inlet 211 and an airflow outlet 212, and normal temperature gas enters from the airflow inlet 211, and is converted into hot airflow after passing through the heating element 3, and the hot airflow is led out through the airflow outlet 212, so as to realize the functions of drying and heating the lamp.

The housing unit 2 comprises a first half-shell 21 and a second half-shell 22, the first half-shell 21 being assembled to the second half-shell 22 in a manually removable manner to facilitate the user to replace a malfunctioning structure, such as a power unit, inside the housing unit. The first half shell 21 and the second half shell 22 form a cavity that defines the power unit 1 (the bracket 13), and the cavity is surrounded by an inner surface of the first half shell 21, an inner surface of the second half shell 22, and protrusions formed to protrude from the inner surfaces, so that the power unit 1 is positioned in the radial direction and the axial direction, which are perpendicular to the radial direction and the axial direction. Optionally, the first half shell 21 and the second half shell 22 are fixed by a snap-fit manner, and the user can detach the first half shell 21 and the second half shell 22 by simply releasing the snap-fit manner, where the snap-fit portion 221 of the second half shell 22 is exemplarily shown in fig. 4, and the snap-fit portion of the first half shell 21 is not shown.

Referring to fig. 4 and 5, in the embodiment, the power supply unit 4 includes a circuit board 41 and a rechargeable power supply 42 electrically connected to the circuit board 41, and the rechargeable power supply 42 supplies power to the motor 12 and the heating unit 3 through the circuit board 41. The power supply unit 4 further includes a second power interface 43 and a third power interface 44 electrically connected to the circuit board 41, respectively, and the heating unit 3 includes a heating element 31 and a fourth power interface 32 electrically connected to the heating element 31. The first power interface 142 is configured to interface with the second power interface 43 to electrically connect the motor 12 and the power supply unit 4; the third power interface 44 is configured to interface with the fourth power interface 32 to electrically connect the heating element 31 and the power unit 4, so that the movable power source 42 can supply power to the motor 12 of the power unit 1 and the heating element 31 of the heating unit 3 through the circuit board 41. The term "docking" is to be understood as meaning that both can be manually inserted and removed to achieve docking, and that the connection and disconnection of the circuit can be achieved without the aid of tools. Therefore, modularization of structures of all parts of the hot glue gun is achieved, when one module breaks down, a user can directly and manually replace the module, and the hot glue gun can continue to work normally.

Referring to fig. 6, in another embodiment, the power unit 1 includes a first power interface 142 and a second power interface 143 that are electrically connected, the power unit includes a third power interface 44 that is electrically connected to the circuit board, the heating unit 3 includes a heating element 31 and a fourth power interface 32 that is electrically connected to the heating element, the first power interface 142 includes a first sub-port 1421 and a second sub-port 1422, and the first sub-port 1421 is electrically connected to the motor 12 (for ensuring connection stability, an unreleasable connection is selected); the second power interface 143 is configured to interface with the third power interface 44 to electrically connect the motor 12 and the power supply unit 4; the second sub-port 1422 is configured to interface with the fourth power interface 32, so as to electrically connect the heat generating element 31 and the power supply unit 4. In other words, the electric energy is split into two paths, i.e. the first sub-port 1421 and the second sub-port 1422, after passing through the first power interface 141, so as to respectively supply the electric motor 12 and the heating element 31, that is, the power unit provides a bridge circuit between the circuit board 41 and the rechargeable power supply 42.

Referring to fig. 7, optionally, the power unit 1 includes a first coupling structure 10, the heat generating unit 3 includes a second coupling structure 30, and the first coupling structure 10 and the second coupling structure 30 cooperate to achieve electrical and mechanical connection between the power unit 1 and the heat generating unit 3. Specifically, the second sub-port 1422 is formed in the first coupling structure 10, and the fourth power port 32 is formed in the second coupling structure 30.

The first coupling structure 10 further comprises a first magnet 101 and the second coupling structure 30 further comprises a second magnet 301. The second sub-port 1422 is disposed on the surface 100 of the power unit 1 facing the heat generating unit 3, and the second sub-port 1422 is located outside the air outlet 1122; the fourth electrical interface 32 is disposed on the surface 300 of the heat generating unit 3 facing the power unit 1, so that when the first magnet 101 and the second magnet 301 are attracted to each other, the second sub-port 1422 is in butt joint with the fourth electrical interface 32, and meanwhile, the second sub-port 1422 and the fourth electrical interface 32 are ensured to have higher alignment accuracy.

Preferably, the first coupling structure 10 includes at least two first magnets 101 arranged along the circumferential direction, the second coupling structure 30 includes at least two second magnets 302 arranged along the circumferential direction, the polarities of the two first magnets 101 are opposite, and the polarities of the two second magnets 301 are opposite, so as to avoid user's insertion reversal, and the magnetic force makes the docking manner simpler without user's alignment; in addition, when the heating element (generally, the service life is shorter than the original elements such as the motor, the circuit board and the like) breaks down, the heating unit can be taken down by directly overcoming the magnetic force, and then a new heating unit is placed, so that the replacement process is simpler.

In other embodiments, one of the first coupling structure 10 and the second coupling structure 30 comprises a magnet and the other comprises a ferromagnetic element (made of iron, cobalt, nickel, etc.). For example, the first coupling structure may comprise a first magnet, and the metal housing of the heating element may be attracted to the first magnet as a ferromagnetic element.

In another embodiment, the power unit 4 includes a circuit board 41 ' and an ac power plug 45 electrically connected to the circuit board 41 ', wherein the circuit board 41 ' includes an ac-dc conversion circuit, and the ac power plug is used for electrically connecting to an ac power source. The structure of the circuit board 41' is the same as that of the circuit board of any of the embodiments, and the corresponding structure of the embodiments can be directly used for each power interface, which is not described herein again.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.

Claims

1. A power unit is used for a hot air gun, the hot air gun comprises a power supply unit for supplying power to the power unit, and the hot air gun is characterized in that the power unit comprises a bracket, a motor arranged on the bracket, a fan driven by the motor and a first connecting assembly electrically connected with the motor, the motor is electrically connected to the power supply unit through the first connecting assembly, and the first connecting assembly is configured to be electrically connected with the power supply unit in a manually detachable mode;

the support is provided with an air inlet and an air outlet of the fan, and the opening direction of the air inlet is perpendicular to the opening direction of the air outlet.

2. A heat gun comprising a housing unit, a heat generating unit assembled to the housing unit, and the power unit of claim 1, wherein the power unit is assembled to the housing unit in a manually detachable manner, and when the power unit is assembled to the housing unit, the heat generating unit faces the air outlet, and the airflow generated by the power unit is used to guide out the heat generated by the heat generating unit.

3. The heat gun according to claim 2, wherein the power unit comprises a circuit board and a rechargeable power source electrically connected to the circuit board, and the rechargeable power source supplies power to the motor and the heat generating unit through the circuit board.

4. The heat gun according to claim 2, wherein the power supply unit comprises a circuit board and an ac power plug electrically connected to the circuit board, the circuit board comprises an ac-dc conversion circuit, and the ac power plug is configured to be electrically connected to an ac power source.

5. The heat gun according to claim 3 or 4, wherein the first connecting assembly comprises a first power interface electrically connected to the motor, the power unit comprises a second power interface and a third power interface electrically connected to the circuit board, respectively, and the heating unit comprises a heating element and a fourth power interface electrically connected to the heating element;

the first power interface is configured to be in butt joint with the second power interface so as to realize the electrical connection between the motor and the power supply unit; the fourth power interface is configured to be docked with the third power interface to electrically connect the heating element with the power supply unit.

6. The heat gun according to claim 3 or 4, wherein the power unit comprises a first power interface and a second power interface electrically connected to each other, the power unit comprises a third power interface electrically connected to the circuit board, the heat unit comprises a heat generating element and a fourth power interface electrically connected to the heat generating element, the first power interface comprises a first sub-port and a second sub-port, and the first sub-port is electrically connected to the motor;

the second power interface is configured to be in butt joint with the third power interface so as to realize the electrical connection between the motor and the power supply unit; the second sub-port is configured to be docked with the fourth power interface to electrically connect the heating element with the power supply unit.

7. The heat gun according to claim 6, wherein the housing unit comprises a first half-shell and a second half-shell, the first half-shell being assembled to the second half-shell in a manually detachable manner;

the first half shell and the second half shell form a cavity for limiting a power unit, and the power unit is limited by the first half shell and the second half shell in the radial direction and the axial direction, and the radial direction is perpendicular to the axial direction.

8. The heat gun according to claim 6, wherein the power unit comprises a first coupling structure, the heat generating unit comprises a second coupling structure, and the first coupling structure and the second coupling structure cooperate to electrically and mechanically connect the power unit and the heat generating unit;

the second subport is formed in the first coupling structure and the fourth power port is formed in the second coupling structure.

9. The heat gun according to claim 8, wherein the first coupling structure comprises a first magnet and the second sub-port, the second coupling structure comprises a second magnet and the fourth power port, and the first magnet and the second magnet attract each other to achieve the mechanical connection between the power unit and the heat generating unit;

the second sub-port is arranged on the surface of the power unit facing the heating unit and is positioned outside the air outlet; the fourth power interface is arranged on the surface of the heating unit facing the power unit;

the second sub-port interfaces with the fourth power interface when the first magnet and the second magnet are attracted to each other.

10. The heat gun according to claim 9, wherein the first coupling structure comprises at least two first magnets arranged along the circumferential direction, the second coupling structure comprises at least two second magnets arranged along the circumferential direction, the first magnets and the second magnets correspond to each other in a one-to-one manner, the polarities of the two first magnets are opposite, and the polarities of the two second magnets are opposite.