CN215356891U

CN215356891U - Large-current inverter welding machine based on three plates

Info

Publication number: CN215356891U
Application number: CN202121780553.5U
Authority: CN
Inventors: 艾利; 黎领
Original assignee: Chongqing Cameo Gasoline Engine Co ltd
Current assignee: Chongqing Camel Power Machinery Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2021-12-31
Anticipated expiration: 2031-08-02

Abstract

The utility model discloses a three-plate-based large-current inverter welding machine which comprises a fan, wherein a first PCB, a second PCB and a third PCB are fixed at the front end of the fan; the distance between the first PCB and the front end of the fan is d2, the distance between the second PCB and the front end of the fan is d1, and d2 is larger than d 1. The first PCB is provided with a first rectifying circuit and a filter capacitor, the second PCB is provided with an inverter circuit, and the third PCB is provided with a second rectifying circuit. According to the utility model, the power devices with higher heating are respectively arranged on the second PCB and the third PCB which are close to the fan, and the second PCB and the third PCB adopt an up-down structure, so that the power devices with higher heating can fully receive the heat radiation of the fan, thereby improving the heat radiation speed. After the heat dissipation structure of the whole machine is optimized, the bearing pressure of a power device is reduced, so that the output power and the working duration are improved.

Description

Large-current inverter welding machine based on three plates

Technical Field

The utility model relates to the technical field of inverter welding machines, in particular to a large-current inverter welding machine based on three plates.

Background

At present, most of inverter welding machines with small machine cores on the market mainly adopt an inverter and secondary rectification circuit left-right structure layout, and a rectification filter bottom plate is arranged at the top, so that a high-power filter capacitor on the bottom plate cannot realize convection heat dissipation. The whole machine has compact structure, so that the heat dissipation efficiency is low, the power device can not dissipate heat, the load duration rate of the whole machine is low, large-current long-time work can not be realized, and the bearing pressure of the main power device is large.

Disclosure of Invention

Aiming at the problem that the heat dissipation speed of a power device in an inverter welding machine is low in the prior art, the utility model provides a three-plate-based large-current inverter welding machine.

In order to achieve the purpose, the utility model provides the following technical scheme:

a large-current inverter welding machine based on three plates comprises a fan, wherein a first PCB, a second PCB and a third PCB are fixed at the front end of the fan; the distance between the first PCB and the front end of the fan is d2, the distance between the second PCB and the third PCB and the front end of the fan are equal and d1, and d2 is larger than d 1.

Preferably, a first rectifying circuit and a filter capacitor are arranged on the first PCB, an inverter circuit is arranged on the second PCB, and a second rectifying circuit is arranged on the third PCB.

Preferably, the surfaces of the first PCB, the second PCB and the third PCB are parallel to the air outlet direction of the fan.

Preferably, the second PCB and the third PCB are spaced from each other up and down.

Preferably, the first PCB and the second PCB are disposed in parallel.

Preferably, the power supply further comprises an external bracket type annular transformer, the input end of the transformer is welded on the second PCB through a wire and is connected with the inverter circuit, and the output end of the transformer is welded on the third PCB through a wire and is connected with the second rectifying circuit.

Preferably, a pipeline is arranged around the first PCB, the second PCB and the third PCB, namely the first PCB, the second PCB and the third PCB or the transformer are arranged inside the pipeline.

In summary, due to the adoption of the technical scheme, compared with the prior art, the utility model at least has the following beneficial effects:

according to the utility model, the power devices with higher heating are respectively arranged on the second PCB and the third PCB which are close to the fan, and the second PCB and the third PCB adopt an up-down structure, so that the power devices with higher heating can fully receive the heat radiation of the fan, thereby improving the heat radiation speed. After the heat dissipation structure of the whole machine is optimized, the bearing pressure of a power device is reduced, so that the output power and the working duration are improved.

Description of the drawings:

FIG. 1 is a schematic diagram of an exemplary three-plate based high current inverter welder according to the present invention.

FIG. 2 is a schematic diagram of an exemplary three-plate based high current inverter welder circuit according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to examples and embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

In the working process of the inverter welding machine, the power device which generates heat to the maximum extent in the welding loop is the inverter circuit and the second rectifying circuit, so that the heat dissipation speed generated by the inverter circuit and the second rectifying circuit is increased, the bearing pressure of the power device is reduced, the output power of the inverter welding machine is larger, and meanwhile the working time of the power device is greatly prolonged.

As shown in fig. 1, the utility model provides a three-plate-based large-current inverter welding machine, which comprises a case and a fan, wherein the fan can be fixed in the middle of the case, a first PCB, a second PCB and a third PCB are fixed at the front end (air outlet) of the fan, and the surfaces of the first PCB, the second PCB and the third PCB are parallel to the air outlet direction of the fan.

The second PCB and the third PCB are arranged at an upper and lower interval (namely, the distance between the second PCB and the third PCB is M, M is larger than 0), so that the power devices on the second PCB and the third PCB can fully receive the heat dissipation of the fan, and the heat dissipation efficiency cannot be influenced by mutual shielding. Preferably, the total distance (the thickness of the second PCB + the thickness of the third PCB + M) between the second PCB and the third PCB is smaller than the height of the fan, so that the second PCB and the third PCB can fully receive the air volume of the fan, and the heat dissipation speed is improved.

In order to ensure the miniaturization of the structure, if the first PCB and the second PCB are also arranged at an upper interval and a lower interval, the volume of the fan can be improved, and the size of the whole machine is influenced.

The distance between the second PCB and the front end of the fan is d1, the distance between the first PCB and the front end of the fan is d2, and d2 is larger than d 1.

For example, the welding interface is at the front end (left side) of quick-witted case, and the air-out direction of fan is for following the right side left, for the guarantee fan can cover heat radiating area more, then is parallel and fixed with the face of first PCB board, second PCB board and third PCB board and the bottom of quick-witted case, and the fan can blow to first PCB board, second PCB board and third PCB board on bigger area like this, improves the radiating efficiency.

As shown in fig. 2, a welding loop in a three-plate based high-current inverter welding machine includes a protection start circuit, a first rectification circuit, a filter capacitor, an inverter circuit, a transformer and a second rectification circuit, which are connected in sequence.

The protection starting circuit is an existing circuit and is used for performing overlarge protection on input AC current (which can be 220V, 110V/220V or 220V/380V) after the AC power supply inputs the AC current; a first rectifying circuit, which may be a fast recovery rectifier, for converting an input AC current into a direct current; the filter capacitor can be adopted and is used for filtering the direct current output by the first rectifying circuit; an inverter circuit, which may adopt an Insulated Gate Bipolar Transistor (IGBT), for inverting the dc output from the filter capacitor into ac; the transformer is used for transforming the alternating current output by the inverter circuit; the second rectifying circuit can also adopt a fast recovery rectifying tube for converting alternating current output by the transformer into direct current and outputting the direct current to the welding interface for welding.

In this embodiment, the protection start circuit, the first rectification circuit and the filter capacitor are disposed on the first PCB, the inverter circuit and the transformer are disposed on the second PCB, and the second rectification circuit is disposed on the third PCB.

In this embodiment, the transformer may also be an external bracket type toroidal transformer, an input end of the transformer is welded to the second PCB through a wire and connected to the inverter circuit, an output end of the transformer is welded to the third PCB through a wire and connected to the second rectifying circuit, and the second rectifying circuit is connected to the welding interface.

In this embodiment, be provided with the pipeline around first PCB board, second PCB board and third PCB board or transformer, be about to first PCB board, second PCB board and third PCB board or transformer setting are inside the pipeline, and such advantage is that the wind that makes the fan produce only flows in the pipeline, can not spill over to all around to the amount of wind that power device can accept increases, improves the radiating efficiency.

In this embodiment, the inverter welding machine can be used in various power utilization scenarios, such as 220V, 110V/220V, 220V/380V, and the like, and has a wide application range.

In the embodiment, due to the structural arrangement of the three PCB boards, the volume of the fan is reduced, the heat dissipation efficiency is not influenced, and the volume of the whole fan is reduced. All circuits in the welding loop of the same worker are positioned on the heat dissipation air duct of the fan, so that the heat dissipation efficiency of the whole machine is improved, all devices in the welding loop can bear larger working current, and the welding power is improved.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the utility model, and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model in practice.

Claims

1. A large-current inverter welding machine based on three plates comprises a fan and is characterized in that a first PCB, a second PCB and a third PCB are fixed at the front end of the fan; the distance between the first PCB and the front end of the fan is d2, the distance between the second PCB and the third PCB and the front end of the fan is the same and is d1, and d2 is larger than d 1.

2. A three-plate based high current inverter welder according to claim 1, wherein the first PCB is provided with a first rectifying circuit and a filter capacitor, the second PCB is provided with an inverter circuit, and the third PCB is provided with a second rectifying circuit.

3. The three-plate-based high-current inverter welding machine according to claim 1, wherein the plate surfaces of the first PCB, the second PCB and the third PCB are parallel to the air outlet direction of the fan.

4. A three-plate based high current inverter welder according to claim 1, wherein said second PCB and said third PCB are spaced apart from each other.

5. A three-plate based high current inverter welder according to claim 1, wherein the first PCB and the second PCB are arranged in parallel.

6. A three-plate based high current inverter welder according to claim 2, further comprising an external frame type ring transformer, wherein the input terminal of the transformer is connected to the second PCB and the inverter circuit by a wire, and the output terminal of the transformer is connected to the second rectifier circuit by a wire and the third PCB.

7. The three-plate-based high-current inverter welding machine according to claim 1, wherein a pipeline is arranged around the first PCB, the second PCB and the third PCB, namely, the first PCB, the second PCB and the third PCB or the transformer are arranged inside the pipeline.