Welding equipment protection method and system and welding equipment

Abstract

The invention provides a welding equipment protection method and system and welding equipment. The welding equipment protection method comprises the steps that the output current of welding equipment is collected in real time; integrating the output current based on the working time to obtain the current output heat; preset allowable heat is obtained, and the current output heat is compared with the preset allowable heat; and when the current output heat is larger than or equal to the preset allowable heat, the output current of the welding equipment is turned off. According to the welding equipment protection method, the working state of the welding equipment can be effectively monitored and controlled, and the welding equipment is prevented from being damaged due to overheating.

Description

Technical Field

[0001] The present application relates to the field of welding technology, and in particular to a welding equipment protection method, system and welding equipment. Background Art

[0002] With the continuous development of welding technology, welding equipment is widely used in industrial production. During the use of welding equipment, especially when working at full load for a long time, it is easy to overheat, which may lead to equipment damage or unstable operation.

[0003] At present, welding equipment usually adopts overheat protection based on temperature protection switch or NTC (thermistor). Due to cost and other reasons, usually only a single temperature protection switch is used to arrange at the component with large heat generation, resulting in the situation that the temperature at the location of the temperature protection device has not reached the overheating temperature while other components have already overheated.

[0004] It can be seen that the traditional overheating protection method has a certain hysteresis and inaccuracy, and cannot effectively prevent overheating when the power is not full-loaded and the heat generation is greater than the heat dissipation, resulting in the equipment being damaged to a certain extent before overheating occurs.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the invention

[0006] Based on this, the embodiments of the present application provide a welding equipment protection method, system and welding equipment, which can effectively monitor and control the working status of the welding equipment to avoid damage to the welding equipment due to overheating.

[0007] According to some embodiments, the present application provides a welding equipment protection method, including:

[0008] Collect the output current of welding equipment in real time;

[0009] Integrating the output current based on the working time to obtain current output heat;

[0010] Obtaining a preset let-through heat, and comparing the current output heat with the preset let-through heat;

[0011] When the current output heat is greater than or equal to the preset let-through heat, the output current of the welding device is turned off.

[0012] In some embodiments, obtaining the preset let-through heat comprises:

[0013] Obtaining the rated maximum output current of the welding equipment and the maximum working time under the rated duty cycle;

[0014] According to the rated maximum output current and the maximum working time, a maximum let-through heat of the welding equipment is obtained, and the maximum let-through heat is used as the preset let-through heat.

[0015] In some embodiments, obtaining the preset let-through heat comprises:

[0016] In response to an external input command, the preset let-through heat is set.

[0017] In some embodiments, the protection method further comprises:

[0018] Get the preset heat loss per unit time;

[0019] Integrating the preset heat loss per unit time based on the protection time to obtain the current heat dissipation;

[0020] Acquire a preset heat dissipation amount, and compare the current heat dissipation amount with the preset heat dissipation amount;

[0021] When the current heat dissipation is greater than or equal to the preset heat dissipation, the output of the output current is restored.

[0022] In some embodiments, obtaining the preset heat loss per unit time includes:

[0023] Obtaining the rated maximum output current of the welding equipment and the maximum working time under the rated duty cycle;

[0024] Get standard protection recovery time;

[0025] A standard heat loss per unit time is acquired according to the rated maximum output current, the maximum working time and the standard protection recovery time, and the standard heat loss per unit time is used as the preset heat loss per unit time.

[0026] In some embodiments, the value of the preset heat dissipation is greater than or equal to the current output heat when the output current of the welding device is turned off.

[0027] In some embodiments, the protection method further comprises:

[0028] In response to an external input command, setting a target protection recovery time;

[0029] After the target protection recovery time has passed, the output of the output current is restored.

[0030] According to some embodiments, the present application further provides a welding equipment protection system on the other hand, which is used to implement the welding equipment protection method provided in the above embodiments, and the protection system includes:

[0031] The acquisition module is used to collect the output current of the welding equipment in real time;

[0032] An integration module, connected to the acquisition module, for integrating the output current based on the working time to obtain the current output heat;

[0033] a comparison module, connected to the integration module, for obtaining a preset let-through heat value, and comparing the current output heat value with the preset let-through heat value;

[0034] The control module is connected to the comparison module and is configured to: when the current output heat is greater than or equal to the preset let-through heat, the control module turns off the output current of the welding device.

[0035] In some embodiments, the protection system includes a micro control unit; the integration module, the comparison module and the control module are integrated in the micro control unit.

[0036] According to some embodiments, the present application provides a welding device on another aspect, wherein the welding device is protected by the welding device protection method provided by the aforementioned embodiment; or, the welding device includes the welding device protection system provided by the aforementioned embodiment, and is configured as follows: the welding device protection system protects the welding device based on the output current of the welding device and the working time of the welding device.

[0037] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application.

[0038] The embodiments of the present application may or at least have the following advantages:

[0039] In the embodiment of the present application, the current output heat is obtained by collecting the output current of the welding equipment in real time and integrating it based on the working time, so that the cumulative value of the heat output of the welding equipment can be accurately obtained, instead of relying solely on the local measured temperature inside the equipment. The protection method proposed in the present application takes into account the current fluctuation and cumulative effect during the welding process, and can achieve higher accuracy and reliability than the traditional protection mechanism based on measuring temperature.

[0040] Furthermore, by comparing the current output heat with the preset let-through heat and promptly shutting off the output current when the current output heat reaches or exceeds the preset let-through heat, the working state of the welding equipment can be effectively monitored and controlled to avoid damage to the welding equipment due to overheating.

[0041] Therefore, the embodiment of the present application can monitor the output current of the welding equipment in real time, and accumulate the output heat according to the integral of the output current with respect to the working time, so as to realize dynamic adjustment of the working state of the welding equipment.

[0042] Other advantages, objectives and features of the present application will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and study, or can be taught from the practice of the present application to some extent. The objectives and other advantages of the present application can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0044] Figure 1 A schematic flow chart of a welding equipment protection method provided in some embodiments of the present application;

[0045] Figure 2 A schematic diagram of a flow chart of obtaining a preset let-through heat in a welding equipment protection method provided in some embodiments of the present application;

[0046] Figure 3 A schematic flow chart of a welding equipment protection method provided in some other embodiments of the present application;

[0047] Figure 4 A schematic diagram of a flow chart for obtaining a preset heat loss per unit time in a welding equipment protection method provided in some embodiments of the present application;

[0048] Figure 5 A schematic flow chart of a welding equipment protection method provided in some embodiments of the present application;

[0049] Figure 6 A structural block diagram of a welding equipment protection system provided in some embodiments of the present application;

[0050] Figure 7 A working principle diagram of a welding equipment protection system provided in some embodiments of the present application.

[0051] Description of reference numerals:

[0052] 100 Acquisition module 200 Integration module

[0053] 300 comparison module 400 control module DETAILED DESCRIPTION

[0054] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0056] It should be noted that, in the following embodiments, when a layer, region or element is "connected", it can be interpreted that the layer, region or element is not only directly connected but also connected through other constituent elements placed therebetween. For example, when a layer, region, element, etc. is described as being connected or electrically connected, the layer, region, element, etc. can be connected or electrically connected not only directly or directly, but also through another layer, region, element, etc. placed therebetween.

[0057] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that when the terms "consisting of" and / or "comprising" are used in this specification, the presence of the features, integers, steps, operations, elements and / or parts can be determined, but the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups is not excluded. At the same time, when used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0058] At present, welding equipment usually adopts overheat protection based on temperature protection switch or NTC (thermistor). Due to cost and other reasons, temperature protection devices are usually arranged at components with large heat generation, resulting in the situation that the temperature at the location of the temperature protection device has not reached the overheating temperature while other components have already overheated.

[0059] It can be seen that the traditional overheating protection method has a certain hysteresis and inaccuracy, and cannot effectively prevent overheating when the power is not full-loaded and the heat generation is greater than the heat dissipation, resulting in the equipment being damaged to a certain extent before overheating occurs.

[0060] In view of the above shortcomings, the present application provides a welding equipment protection method, system and welding equipment, which effectively monitor and control the working state of the welding equipment to prevent the welding equipment from being damaged due to overheating. The details will be described in the subsequent embodiments.

[0061] This application proposes a welding equipment protection method. Figure 1 The welding equipment protection method may specifically include the following steps S100 to S400:

[0062] S100: collect the output current of welding equipment in real time.

[0063] S200: Integrate the output current based on the working time to obtain the current output heat.

[0064] S300: Obtain a preset let-through heat, and compare the current output heat with the preset let-through heat.

[0065] S400: When the current output heat is greater than or equal to the preset let-through heat, the output current of the welding equipment is turned off.

[0066] In the welding equipment protection method provided in the present application, the current output heat is obtained by real-time acquisition of the output current of the welding equipment and integration of it based on the working time, so that the cumulative value of the output heat of the welding equipment can be accurately obtained, rather than relying solely on the local measured temperature inside the equipment. This protection method takes into account the current fluctuation and cumulative effect during the welding process, and can achieve higher accuracy and reliability than the traditional protection mechanism based on measuring temperature.

[0067] Furthermore, by comparing the current output heat with the preset let-through heat and promptly shutting off the output current when the current output heat reaches or exceeds the preset let-through heat, the working state of the welding equipment can be effectively monitored and controlled to avoid damage to the welding equipment due to overheating.

[0068] Therefore, the welding equipment protection method provided in the present application can monitor the output current of the welding equipment in real time, and accumulate the output heat according to the integral of the output current with respect to the working time, thereby realizing dynamic adjustment of the working state of the welding equipment.

[0069] For example, when the welding equipment is working for a long time at a non-full load state, the protection method provided by the present application can effectively avoid the situation where the temperature at the location where the temperature protection device is arranged has not reached the overheating temperature while other devices have already overheated and protection cannot be implemented.

[0070] In some possible embodiments, the protection method provided by the present application can work in conjunction with a traditional overheat protection method. Traditional overheat protection methods usually implement overheat protection for equipment by placing a temperature protection switch at a component with a larger heat generation. When the equipment is working at full load, the traditional overheat protection method is still used to protect key components through a temperature protection switch. When the equipment is not working at full load, the protection method proposed in this application is used. In this way, more accurate overheat protection can be provided for the temperature rise phenomenon of components at non-thermal protection switches. Through differentiated protection strategies, more accurate and efficient protection can be provided under different working conditions of full load and non-full load, achieving the best equipment protection effect, thereby improving the safety and reliability of the equipment.

[0071] In welding equipment, the working current is mostly direct current or pulse current with stable changes. At this time, the inductance and capacitance effects have little effect on the current change, and the effect of the current change on the heat generation is mainly determined by the resistance.

[0072] Based on this, for step S200, in some embodiments, it can be assumed that the device in the welding equipment is a full resistive device, and the output current is integrated based on the working time. Ignoring the influence of inductance and capacitance on energy storage and release can greatly reduce the complexity of system calculation, thereby improving the real-time and practicality of the protection method.

[0073] It should be noted that due to the steps in the protection method involved in this application, when collecting and calculating data for the same welding equipment, the resistance value can be regarded as a constant, which does not affect the comparison between different heat values ​​(such as the current output heat and the maximum allowable heat to be mentioned later). In order to simplify the heat calculation process, when collecting and calculating data for the same welding equipment, the resistance value can also be uniformly regarded as 1.

[0074] See also Figure 2 In some embodiments, the process of obtaining the preset let-through heat in step S300 may specifically include the following steps S310 to S320.

[0075] In step S310, the rated maximum output current I of the welding equipment is obtained. max , and the maximum working time t at rated duty cycle max .

[0076] In welding equipment, the rated maximum output current I max It refers to the maximum current value that the welding equipment can continuously provide under normal working conditions. The maximum current value can be specified according to the construction and use requirements of the welding equipment. Exceeding the maximum current value may cause the equipment to overheat or be damaged.

[0077] Maximum working time at rated duty cycle tmax Refers to the time limit during welding that the welding equipment can continue to work at the rated temporary load rate. The maximum working time t max It is related to the heat dissipation capacity and internal temperature control of the welding equipment. That is, the maximum working time t max It is the maximum working time to ensure the safe operation of the equipment and avoid damage to the electrical components inside the equipment due to overheating.

[0078] It can be understood that the rated maximum output current I of the welding equipment max and the maximum working time t at rated duty cycle max It is specified when the welding equipment is designed and manufactured. It is the design parameter of the welding equipment and usually does not change with time or changes in usage conditions. Therefore, when collecting and calculating data for the same welding equipment, the rated maximum output current I max and the maximum working time t at rated duty cycle max Can be considered as a constant.

[0079] In step S320, according to the rated maximum output current I max and maximum working time t max , obtain the maximum let-through heat of the welding equipment, and use the maximum let-through heat as the preset let-through heat.

[0080] The above embodiment considers the rated maximum output current I of the welding equipment. max and the maximum working time t at rated duty cycle max , can accurately set a reasonable preset let-through heat for each welding equipment, ensuring that the equipment can maintain safe operation at its maximum load and avoid damage caused by overload or excessive heat accumulation.

[0081] The protection method provided in the above embodiment can be used according to the specific design parameters (rated maximum output current I max and the maximum working time t at rated duty cycle max ) Flexible setting of preset let-through heat, suitable for various types of welding equipment, with high adaptability. Welding equipment of different specifications can be personalized according to their actual design parameters to ensure that each equipment can be reasonably protected within its working range.

[0082] In some other embodiments, step S300 may also set the preset let-through heat in response to an external input instruction. The external input instruction may be an instruction input by a user through an input component such as a button, a knob or a touch screen on the operation panel.

[0083] As different operators use and different welding tasks change, user needs may vary. In the above embodiments, the preset let-through heat can be set through external input instructions, and the preset let-through heat can be flexibly adjusted according to the needs of different welding tasks, the characteristics of welding materials and / or changes in the working environment, so that the protection method can meet the specific needs of different welding scenarios and improve the adaptability of welding equipment. The protection method provided by the above embodiments can avoid the limitations brought by the fixed preset let-through heat, and can respond quickly according to the actual situation on site, so that the welding equipment can better adapt to different usage scenarios, provide more personalized protection settings, and further improve the versatility and adaptability of the equipment.

[0084] The following definition I 100％ In some embodiments, when the output current I0 of the welding device is less than or equal to I 100％ When the welding equipment is in normal working condition, the above protection method does not intervene.

[0085] When the output current I0 of the welding equipment is greater than I 100％ And less than or equal to the rated maximum output current I of the welding equipment max When the current output heat Q obtained by using the working time as the integral amount is greater than or equal to the maximum let-through heat Q m ax When the output current is turned off, the welding equipment enters the protection state.

[0086] See also Figure 3 In some embodiments, the welding equipment protection method may further include the following steps S510 to S540.

[0087] In step S510, a preset heat loss per unit time is obtained, wherein the preset heat loss per unit time refers to the heat loss per unit time.

[0088] In step S520, the preset heat loss per unit time is integrated based on the protection time to obtain the current heat dissipation.

[0089] It can be understood that, since the output current of the welding equipment is in the off state during the execution of step S520, the output current is 0 at this time.

[0090] In step S530, a preset heat dissipation amount is obtained, and the current heat dissipation amount is compared with the preset heat dissipation amount.

[0091] In step S540, when the current heat dissipation is greater than or equal to the preset heat dissipation, the output of the output current is restored.

[0092] The above embodiment integrates the preset heat loss per unit time based on the protection time to obtain the current heat dissipation and compares it with the preset heat dissipation, which can more accurately reflect the heat dissipation of the equipment. Compared with the traditional temperature monitoring method, the protection method provided by the above embodiment more accurately considers the heat accumulation of the equipment, and can timely determine whether the equipment has been fully cooled and reached a safe working state, thereby achieving more scientific and efficient overheating protection. For example, the above embodiment can avoid protection misjudgment caused by unstable temperature fluctuations, and improve the reliability and accuracy of the recovery process of the welding equipment.

[0093] See also Figure 4 In some embodiments, the process of obtaining the preset heat loss per unit time in step S510 may specifically include the following steps S511 to S513.

[0094] In step S511, the rated maximum output current I of the welding equipment is obtained. max , and the maximum working time t at rated duty cycle max .

[0095] In step S512, the standard protection recovery time t is obtained. trip .

[0096] It can be understood that the standard protection recovery time of welding equipment is t trip It is specified when the welding equipment is designed and manufactured. It is the design parameter of the welding equipment and usually does not change with time or changes in usage conditions. Therefore, when collecting and calculating data for the same welding equipment, the standard protection recovery time t trip Can be considered as a constant.

[0097] In step S513, according to the rated maximum output current I max , maximum working time t max And standard protection recovery time t trip , obtain the standard heat loss per unit time, and use the standard heat loss per unit time as the preset heat loss per unit time.

[0098] For example, the standard heat loss per unit time may be calculated based on the following formula:

[0099]

[0100] In the above formula, Dec is the standard heat loss per unit time, and R is regarded as a constant.

[0101] In the protection state of the welding equipment, the heat accumulation begins to decrease, and decreases by Dec per unit time (the standard heat loss per unit time).max , Maximum working time at rated load rate t max And the standard protection recovery time t tri p Based on these parameters, the standard heat loss per unit time is obtained and used as the preset heat loss per unit time. It can accurately determine the reasonable preset heat loss per unit time for each welding equipment, which is suitable for various types of welding equipment and has high adaptability. Welding equipment of different specifications can be personalized according to their actual design parameters to ensure that each equipment can be reasonably protected within its working range.

[0102] In some embodiments, the preset heat dissipation value can be set to be greater than or equal to the current output heat when the output current of the welding device is turned off. In this way, it can be ensured that the device has fully dissipated heat and reached a safe working state before the output current is restored, so as to avoid the device continuing to work without sufficient cooling, thereby reducing the risk of device damage caused by overheating, which is conducive to improving the reliability and service life of the device.

[0103] See also Figure 5 In some other embodiments, the welding equipment protection method may further include the following steps S610 to S620.

[0104] In step S610 , in response to an external input instruction, a target protection restoration time is set.

[0105] In step S620 , after the target protection recovery time has passed, the output of the output current is restored.

[0106] The above embodiment sets the target protection recovery time through external input instructions, and the user can flexibly adjust the protection recovery time of the equipment according to the needs of the actual welding task. For example, it can provide a more accurate protection strategy according to different conditions of the working environment (such as temperature, welding load, etc.). In this way, it can ensure that the equipment is fully cooled during the recovery process to avoid overheating of the equipment caused by too short a recovery time. The protection method provided by the above embodiment can provide higher protection accuracy, reduce equipment failures and damage, and ensure long-term safe and stable operation of the equipment.

[0107] Based on the same inventive concept, the embodiment of the present application also provides a welding equipment protection system for implementing the welding equipment protection method provided in the above embodiment. Figure 6 The welding equipment protection system may specifically include a collection module 100 , an integration module 200 , a comparison module 300 and a control module 400 .

[0108] Among them, the acquisition module 100 is used to collect the output current of the welding equipment in real time; the integration module 200 is connected to the acquisition module 100, and is used to integrate the output current based on the working time to obtain the current output heat; the comparison module 300 is connected to the integration module 200, and is used to obtain the preset let-through heat, and compare the current output heat with the preset let-through heat; the control module 400 is connected to the comparison module 300, and is configured as follows: when the current output heat is greater than or equal to the preset let-through heat, the control module 400 shuts off the output current of the welding equipment.

[0109] Those skilled in the art will appreciate that, since the welding equipment protection system is used to implement the aforementioned welding equipment protection method, the welding equipment protection system can also achieve the technical effects that can be achieved by the aforementioned welding equipment protection method, which will not be described in detail herein.

[0110] It can be understood that each module in the above welding equipment protection system can be implemented in whole or in part by software, hardware and a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0111] In some embodiments, the welding equipment protection system may include a micro-controller unit (MCU). In this embodiment, the integration module 200, the comparison module 300 and the control module 400 may be integrated into the MCU.

[0112] See also Figure 7 As an example, the output current of the welding equipment can be collected through a sampling circuit and input into the MCU. The MCU integrates the output current based on the working time to obtain the current output heat, that is, the cumulative value of the output heat of the welding equipment. When the current output heat is greater than or equal to the preset let-through heat, the MCU controls the output current and shuts off the output current of the welding equipment.

[0113] Exemplarily, the MCU can also obtain the preset heat loss per unit time, and integrate it with respect to the protection time to obtain the current heat dissipation. When the current heat dissipation is greater than or equal to the preset heat dissipation, the MCU controls the output current to restore the output current.

[0114] It should be noted that the welding equipment protection system of the present application may also include other existing functional modules that support the operation of the welding equipment protection system. Figure 6 The welding equipment protection system shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0115] Based on the same inventive concept, the embodiment of the present application further provides a welding device. The welding device is protected by the welding device protection method provided by the aforementioned embodiment, or includes the welding device protection system provided by the aforementioned embodiment, and is configured as follows: the welding device protection system protects the welding device based on the output current of the welding device and the working time of the welding device. The technical effects that can be achieved by the aforementioned welding device protection method or welding device protection system can also be achieved by the welding device, which will not be described in detail here.

[0116] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features of the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0117] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A welding equipment protection method, characterized in that: include: Collect the output current of welding equipment in real time; Integrating the output current based on the working time to obtain current output heat; Obtaining a preset let-through heat, and comparing the current output heat with the preset let-through heat; When the current output heat is greater than or equal to the preset let-through heat, the output current of the welding device is turned off.

2. The welding equipment protection method according to claim 1, characterized in that: The obtaining of the preset let-through heat comprises: Obtaining the rated maximum output current of the welding equipment and the maximum working time under the rated duty cycle; According to the rated maximum output current and the maximum working time, a maximum let-through heat of the welding equipment is obtained, and the maximum let-through heat is used as the preset let-through heat.

3. The welding equipment protection method according to claim 2, characterized in that: The obtaining of the preset let-through heat comprises: In response to an external input command, the preset let-through heat is set.

4. The welding equipment protection method according to claim 1, characterized in that: The protection method further comprises: Get the preset heat loss per unit time; Integrating the preset heat loss per unit time based on the protection time to obtain the current heat dissipation; Obtaining a preset heat dissipation amount, and comparing the current heat dissipation amount with the preset heat dissipation amount; When the current heat dissipation is greater than or equal to the preset heat dissipation, the output of the output current is restored.

5. The welding equipment protection method according to claim 4, characterized in that: The step of obtaining the preset heat loss per unit time includes: Obtaining the rated maximum output current of the welding equipment and the maximum working time under the rated duty cycle; Get standard protection recovery time; A standard heat loss per unit time is acquired according to the rated maximum output current, the maximum working time and the standard protection recovery time, and the standard heat loss per unit time is used as the preset heat loss per unit time.

6. The welding equipment protection method according to claim 4, characterized in that: The value of the preset heat dissipation is greater than or equal to the current output heat when the output current of the welding device is turned off.

7. The welding equipment protection method according to claim 4, characterized in that: The protection method further comprises: In response to an external input command, setting a target protection recovery time; After the target protection recovery time has passed, the output of the output current is restored.

8. A welding equipment protection system, characterized in that: Used to implement the welding equipment protection method according to any one of claims 1 to 7, the protection system comprises: The acquisition module is used to collect the output current of the welding equipment in real time; An integration module, connected to the acquisition module, for integrating the output current based on the working time to obtain the current output heat; a comparison module, connected to the integration module, for obtaining a preset let-through heat value, and comparing the current output heat value with the preset let-through heat value; The control module is connected to the comparison module and is configured to: when the current output heat is greater than or equal to the preset let-through heat, the control module turns off the output current of the welding device.

9. The welding equipment protection system according to claim 8, characterized in that: The protection system comprises a micro control unit; the integration module, the comparison module and the control module are integrated in the micro control unit.

10. A welding device, characterized in that: The welding equipment is protected by the welding equipment protection method according to any one of claims 1 to 7; or, The welding equipment comprises the welding equipment protection system according to claim 8 or 9, and is configured such that: the welding equipment protection system protects the welding equipment based on an output current of the welding equipment and a working time of the welding equipment.

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