CN222014598U - Automatic dimming filter for welding protection and welding mask - Google Patents

Abstract

The application relates to an automatic dimming filter for welding protection, which comprises the following components: an arc sensing module configured to detect welding arcs; the control module is electrically connected with the arc light sensing module to receive a detection signal from the arc light sensing module, and is configured to modulate a control signal output to the light-changing protection module based on the detection signal; a light-changing protection module including a light shielding sheet for adjusting a light flux passing through the automatic light-changing filter and a light-changing driving circuit for driving the light shielding sheet, the light-changing driving circuit being electrically connected to the control module to drive the light shielding sheet to change light transmittance in response to a control signal from the control module; and a temperature adjustment module electrically connected to the control module and configured to maintain a local temperature around the gobo above a predefined temperature threshold.

Description

Automatic dimming filter for welding protection and welding mask

Technical Field

The present application relates generally to welding work protective equipment, and more particularly to an automatic darkening filter (Auto DARKENING FILTER, ADF) suitable for use in a low temperature, variable environment and a welding mask equipped with the same.

Background

The eyes, skin, respiratory system, etc. of the worker are adversely damaged by strong light, infrared radiation, ultraviolet rays, splashes, harmful gases, etc. generated in the welding operation, so that the worker needs to wear a protective device to filter harmful rays, shield strong light, and block direct contact of human skin with the high-heat operation environment when the welding operation is performed.

The automatic dimming filter developed in recent years utilizes the spectrum detection and photoelectric control technology to realize the automatic dimming adjustment of the dimming sheet for automatically changing the dimming property in response to the environment light intensity, and can provide more comfortable and flexible eye protection for welding workers. To ensure safety, the light shielding sheet should be darkened instantaneously at the time of welding arcing, and thus, the light shielding sheet is required to have quick response. That is, the response time of the gobo to change from a bright light transmissive state to a dark light blocking state in response to detecting that the arc is energized should be less than a prescribed threshold time.

Common liquid crystal materials used as a light shielding sheet can be generally classified into a normal temperature type liquid crystal material suitable for operation at 0 to 50 ℃, a wide temperature type liquid crystal material suitable for operation at-20 to 70 ℃, and an ultra wide temperature type liquid crystal material suitable for operation at-30 to 80 ℃. According to the specific working environment, a liquid crystal material with a suitable working temperature range can be selected as the light shielding sheet. However, for colder ambient temperatures (e.g., winter natural ambient temperatures may be below-30 ℃ in high latitude areas), no suitable liquid crystal material is available. In addition, temperature affects the rate of movement of the molecules and thus the response speed of the material in addition to the phase state of the molecules. Therefore, the use of automatic dimming filters in some high latitude areas is greatly restricted.

On the other hand, another challenge faced by automatic darkening filters in harsh environments is temperature variation. In particular, under some severe environmental conditions, local weather changes are often difficult to predict with rapid temperature drops. Thus, the use of an automatic darkening filter would require the worker wearing it to be constantly concerned about ambient temperature changes and to determine or in-person test if the automatic darkening filter is still safely usable based on personal experience when the ambient temperature change is noted. This is cumbersome, dangerous and undesirable.

Accordingly, it is desirable to provide an automatic darkening filter and an automatic darkening welding helmet that are suitable for use in cold, low temperature areas and that protect welder from the annoyance of constantly focusing on ambient temperature changes.

Disclosure of utility model

The present application is directed to solving one or more of the problems of the prior art as described above.

According to one aspect of the present application, there is provided an automatic darkening filter for weld protection, comprising: an arc sensing module configured to detect welding arcs; the control module is electrically connected with the arc light sensing module to receive a detection signal from the arc light sensing module, and is configured to modulate a control signal output to the light-changing protection module based on the detection signal; a light-changing protection module including a light shielding sheet for adjusting a light flux passing through the automatic light-changing filter and a light-changing driving circuit for driving the light shielding sheet, the light-changing driving circuit being electrically connected to the control module to drive the light shielding sheet to change light transmittance in response to a control signal from the control module; and a temperature adjustment module electrically connected to the control module and configured to maintain a local temperature around the gobo above a predefined temperature threshold.

Optionally, the temperature adjustment module includes a heating membrane configured to generate heat around the gobo.

Optionally, the heating diaphragm comprises ITO coated glass, and/or the heating diaphragm has a sheet resistance in the range of 5 ohms to 30 ohms.

Optionally, the heating patch is disposed against the light shielding sheet, and/or the heating patch is disposed on a wearer facing side of an automatic darkening filter that includes a viewing window of the light shielding sheet.

Optionally, the temperature adjustment module further comprises a temperature sensor electrically connected to the control module for detecting a local temperature around the gobo, wherein the temperature sensor is attached to the heating membrane.

Optionally, the temperature adjusting module further comprises a heating power supply block for supplying energy to the heating membrane and a heating control switch electrically connected between the heating power supply block and the heating membrane.

Optionally, the heating control switch is electrically connected to the control module to switch on and off the electrical connection of the heating power block and the heating membrane in response to a control signal from the control module.

Optionally, the automatic dimming filter further comprises a human-machine interaction module electrically connected to the control module and having a configuration usable by the wearer to indicate activation or deactivation of the temperature adjustment module and feedback to the wearer of the current operating state of the temperature adjustment module.

Optionally, when the temperature adjustment module is started, responding to a detection signal from the temperature sensor to indicate that the local temperature around the light shielding sheet is lower than or equal to a predefined temperature threshold, outputting a first control signal to the heating control switch to enable the heating control switch to be connected with the heating power supply block and the heating membrane electrically, and outputting a second control signal to the man-machine interaction module to enable the man-machine interaction module to display that the temperature adjustment module is in a heating state currently in a first display mode; and/or the control module is configured to respond to the detection signal from the temperature sensor to indicate that the local temperature around the light shielding sheet is higher than a predefined temperature threshold value when the temperature regulation module is started, output a third control signal to the heating control switch to enable the heating control switch to disconnect the electric connection between the heating power supply block and the heating membrane, and output a fourth control signal to the man-machine interaction module to enable the man-machine interaction module to display that the temperature regulation module is currently in a state of being heated to be higher than the predefined temperature threshold value in a second display mode; and/or the control module is configured to output a fifth control signal to the man-machine interaction module to prompt the man-machine interaction module to display that the temperature regulation module is in an unheated state currently in a third display mode when the temperature regulation module is deactivated and/or the heating power supply block is detected to be unavailable.

According to another aspect of the present application there is also provided a welding mask comprising a mask body configured to isolate a wearer's face from a welding-work local environment and an automatic darkening filter as described above removably attached to the mask body.

An automatic dimming filter in accordance with the principles of the present application provides timely automatic dimming protection in response to welding arc at temperature conditions below the expected temperature range and is capable of automatically adapting to temperature variations to ensure a consistent and reliable provision of such automatic dimming protection.

Drawings

Preferred embodiments of an automatic darkening filter and an automatic darkening welding helmet in accordance with the principles of the present application are described below in conjunction with the accompanying drawings. It is to be understood that the following description is intended to be illustrative only and is not intended to be limiting or exhaustive. For ease of description, the drawings may illustrate some elements or features in somewhat schematic form, and the shapes, sizes, locations, etc. of the elements or features in the drawings are not necessarily drawn to scale. In practice, those of skill in the art may, as appropriate, adjust, modify, and/or replace dimensional proportions and/or positional relationships of the respective features without departing from the spirit and scope of the present disclosure.

Fig. 1 is a perspective view of one example of a welding mask equipped with an automatic darkening filter in accordance with the principles of the present disclosure.

Fig. 2 is a schematic block diagram of a configuration of an automatic dimming filter according to principles of the present disclosure.

Fig. 3 is a schematic structural view illustrating components and arrangement of a viewing window of the automatic dimming filter of fig. 1.

Fig. 4 is a schematic plan view illustrating the arrangement of the heating wires and the temperature sensor on the heating diaphragm in the observation window.

Fig. 5 is a schematic block diagram illustrating an operating mechanism of a temperature adjustment function of an automatic dimming filter according to principles of the present disclosure.

Detailed Description

The application relates to a protective automatic darkening filter and a welding mask configured to be worn by a welder. Thus, to facilitate understanding, the positional relationship of the features of the automatic darkening filter and welding helmet will be described from the perspective of the wearer (i.e., welder, sometimes referred to as a "user"). Accordingly, the spatial orientation term "front" as used herein refers to the portion or orientation of the device that corresponds to the front of the wearer's face when worn, "rear" refers to the portion or orientation of the device that corresponds to the back of the wearer's face when worn, "top" refers to the portion or orientation of the device that corresponds to the top of the wearer's head when worn, "side" refers to the portion or orientation of the device that corresponds to the vicinity of or around the wearer's ear when worn, "inner" refers to the portion or orientation of the device that faces the wearer when worn, and "outer" refers to the portion or orientation of the device that faces away from the wearer when worn. It is to be understood that the use of these terms is merely intended to facilitate a better understanding of the spatial arrangement of the disclosed devices and is not intended to be limiting. These spatial descriptors may be construed accordingly as the device is rotated in use while remaining within the scope of the present application.

Fig. 1 is a structural perspective view illustrating a welding helmet 1 equipped with an automatic darkening filter 100 in accordance with the principles of the present disclosure. The automatic darkening filter 100 is removably attached to the front portion 12 of the welding helmet 1 for providing protection to the wearer's eyes while still allowing the wearer to clearly view the details of the weld through the viewing window 160. The welding helmet 1 may include a helmet body formed of a hard material. In the example of fig. 1, the mask body of the welding mask 1 is shaped in a rear open configuration and includes a front portion 12, two side portions 14 extending rearward and away from each other from both lateral sides of the front portion 12, and a top portion 16 extending rearward from the top of the front portion 12 and joined to the two side portions 14. Front portion 12, side portions 14 and top portion 16 enclose to form a barrier structure for separating the head and face of the wearer from the welding operating environment. At the rear of the side portion 14 of the welding mask 1, an aperture 15 is provided for fitting a headband for the pivotable fixation of the welding mask 1 to the head of a wearer. The automatic dimming filter 100 is disposed in an opening formed in the front portion 12 of the welding mask 1 and is held by a peripheral portion of the opening.

Referring to fig. 2, the automatic dimming filter 100 generally includes a human-computer interaction module 110, an arc sensing module 120, a control module 130, a dimming protection module 140, and a temperature adjustment module 150.

The human-machine interaction module 110 is configured to receive user settings for operating parameters of the automatic darkening filter 100 (e.g., shade, sensitivity, delay time, welding operation time, and mode of operation, etc.) and to provide feedback to the user regarding the current operating parameter settings and operating conditions of the automatic darkening filter 100. The human-machine interaction module 110 may include means for use by a user to provide an indication (e.g., mechanical keys, knobs, touch screen, microphone, etc.), and means for feeding back information to the user (e.g., indicator lights, displays, alarms, buzzers, etc.). Preferably, these appliances are arranged on the wearer-facing side of the automatic darkening filter (i.e. the inside of the welding mask) so that the wearer can operate conveniently and receive relevant information in a timely manner, while also avoiding mishandling due to accidental knocks during welding and reducing wear caused by welding spatter scraping. The human-machine interaction module 110 is electrically connected to the control module 130 to send user instructions to the control module 130 and to receive signals from the control module 130 indicating information to be fed back to the user.

The arc sensing module 120 is configured to monitor light changes (e.g., spectral distribution changes, light intensity changes, and/or combinations thereof) of the welding work area to determine the presence of a welding arc (e.g., when an arc is generated, when an arc is extinguished, and the intensity of an arc changes, etc.). The arc sensing module 120 is disposed on a side of the automatic darkening filter 100 facing the welding work area (i.e., an outside of the automatic darkening filter) to facilitate the reception of optical signals from the welding work area. Preferably, the arc sensing module 120 may include one or more photoelectric sensors, such as infrared, visible, and/or ultraviolet sensors, for converting received light signals into electrical signals. However, other arc sensing arrangements capable of detecting an arc are also possible. The arc sensing module 120 is electrically connected to the control module 130 to send an electrical signal representative of the detected light signal to the control module 130 for processing.

The control module 130 is configured to modulate a control signal output to the light-varying drive circuit 142 based on the detection signal received from the arc sensing module 120 and the user indication received from the human-machine interaction module 110. Further, the control module 130 is further configured to control the on-off state of the heating control switch 154 of the temperature adjustment module 150 based on the user indication received from the human-machine interaction module 110 and the detection signal received from the temperature sensor 152 of the temperature adjustment module 150. The control module 130 may be implemented as a microcontroller and may be packaged with other electronics and/or electrical components within a housing constructed of hard materials to reduce damage and interference from the external environment.

The light-varying protection module 140 includes a light-varying driving circuit 142 electrically connected to the control module 130 and a light shielding sheet 144 electrically connected to the light-varying driving circuit 142 to change a light-transmitting state in response to an excitation from the light-varying driving circuit 142. The light shield 144 forms part of the viewing window 160 (shown in fig. 1) of the automatic darkening filter 100 and is changeable from a brightly light-transmissive state to a darkly light-shielding state when activated, thereby protecting the wearer's eyes from welding arc. By changing the excitation level of the light-altering drive circuit 142, the light-shielding sheet 144 can achieve varying degrees of light shielding. Thus, a user may input or select a desired shade (sometimes also referred to as a "shade number") via the human-machine interaction module 110 based on the intensity of the welding current to be applied to achieve an appropriate light intensity shade.

The temperature adjustment module 150 is configured to maintain the local temperature around the gobo 144 above a predefined temperature threshold, which may be set according to the appropriate operating temperature interval of the gobo material employed. As shown in fig. 2, the temperature adjustment module 150 includes a heating diaphragm 156 for generating heat around the light shielding sheet 144, a temperature sensor 152 for monitoring a local temperature around the light shielding sheet 144, a heating power supply block 158 for supplying power to the heating diaphragm 156, and a heating control switch 154 electrically connected between the heating power supply block 158 and the heating diaphragm 156 for controlling the supply of power to the heating diaphragm 156.

The heating diaphragm 156 is transparent and electrically conductive. One example that may be used as the heating diaphragm 156 is ITO coated glass. However, other transparent conductive materials may be used to form the heating film 156. For a heating diaphragm composed of a specific material, the relationship among the sheet resistance R, the diaphragm thickness d, and the resistivity ρ of the heating diaphragm is: r=ρ/d. Therefore, the adjustment and control of the sheet resistance R of the diaphragm can be realized by adjusting the thickness d of the diaphragm, so that the requirements of light transmittance and heating are met. According to one example of the present disclosure, the heating diaphragm 156 is configured to have a sheet resistance in the range of 5-30 ohms. Preferably, the sheet resistance of the heating diaphragm 156 is 20 ohms.

The temperature sensor 152 is configured to sense a local temperature around the gobos and to send a detection signal to the control module 130 for the control module 130 to modulate a control signal output to the heating control switch 154. The temperature sensor 152 may be contact or non-contact. According to one example of the application, the temperature sensor 152 is implemented as a negative temperature coefficient thermistor mounted on the heating diaphragm 156, as will be described further below with reference to fig. 4. However, other temperature sensors that allow sensing the local temperature around the gobo are also possible.

The heating control switch 154 turns on or off the electrical connection of the heating power block 158 and the heating diaphragm 156 in response to a control signal received from the control module 130, thereby maintaining the local temperature of the light shielding sheet in a temperature interval (e.g., a temperature range above a predefined temperature threshold) suitable for operation of the light shielding sheet in an automated manner. The heating power block 158 may be a rechargeable battery pack integrated into the automatic darkening welding helmet 1, or may be a power interface that may interface with an external power source to draw power from the external power source.

In a preferred embodiment, the light shielding sheet is composed of a liquid crystal material, and as shown in fig. 3, the viewing window 160 includes a UV/IR filter layer 162, a first liquid crystal light shielding sheet 164, a second liquid crystal light shielding sheet 166, and a heating film sheet 156 arranged in this order from the outer side to the inner side of the automatic darkening filter 100 (corresponding to the direction of the page from left to right), wherein the UV/IR filter layer 162 is for filtering (e.g., reflecting and/or absorbing) infrared and ultraviolet rays in the welding arc, and the first and second liquid crystal light shielding sheets are for regulating the visible light flux passing through the automatic darkening filter 100 to the wearer's eyes. Optionally, the viewing window 160 may further include a replaceable protective lens 161 disposed outside the UV/IR filter layer 162, the protective lens being configured to protect the UV/IR filter layer 162 and the functional lenses such as the first and second liquid crystal gobos inside thereof from the damage of splashes. In addition, each of the first and second liquid crystal light shielding sheets may include polarizers for polarizing light on the light incident side and on the light exiting side, as well known to those skilled in the art.

Although it is shown in fig. 3 that the heating film 156 is disposed inside the second liquid crystal shutter 166 as the innermost layer of the viewing window 160, this is not essential. Placement of the heating film 156 near the liquid crystal gobo advantageously shortens the heat transfer path, reduces heat dissipation, and improves the heating efficiency of the gobo. However, in other embodiments, the heating patch may also be arranged at other locations, such as between the first and second liquid crystal gobos, between the UV/IR filter layer and the first liquid crystal gobos, or outside the UV/IR filter layer. In addition, in other embodiments, the number of layers of the liquid crystal gobo may be reduced or increased as desired without departing from the scope of the present disclosure.

Fig. 4 illustrates an arrangement on a heating diaphragm 156. As shown in fig. 4, a pair of heating wires 157 for electrically connecting the heating diaphragm 156 to the heating power supply block 158 are arranged along peripheral portions of opposite sides of the heating diaphragm 156 to heat the light shielding sheet using substantially the entire area of the heating diaphragm 156 and allow the size of the viewing window to be maximized. In addition, the temperature sensor 152 is also configured to be attached to the periphery of the heating diaphragm 156 separately from the heating wire 157. Although it is shown in fig. 4 that the temperature sensor is provided separately from the heating wire, it is also possible that the temperature sensor and the heating wire are arranged in different portions of the flexible wiring board attached to the peripheral portion of the heating diaphragm 156. Thus, the electrical connection of the heating diaphragm and the heating power supply block and the physical contact of the heating diaphragm and the temperature sensor can be simultaneously accomplished by simply attaching the flexible circuit board assembled with the heating wire and the temperature sensor to the opposite side edges of the heating diaphragm 156.

Fig. 5 illustrates the operating mechanism of the temperature regulation function of an automatic dimming filter according to the principles of the present disclosure.

In block 510, a user instruction to activate or deactivate the temperature adjustment module is received from the human-machine interaction module using the control module, and whether the heating power block of the temperature adjustment module is available is detected to determine whether to enable the temperature adjustment module. Detecting whether the heating power block is available includes: it is detected whether a battery pack serving as a heating power supply block has been connected to the circuit, whether the battery pack serving as the heating power supply block connected to the circuit has an amount of power greater than a threshold, or whether an external power supply interface serving as the heating power supply block has been connected to an available external power supply to allow heating by the external power supply.

If the user indicates that the temperature adjustment module is disabled and/or the heating power block of the temperature adjustment module is detected to be unavailable, the control module determines that the temperature adjustment module is not enabled. When it is determined that the temperature adjustment module is not enabled (as represented by "N" in FIG. 5), then block 520 is passed. In block 520, the control module outputs a control signal to the human-machine interaction module to cause the human-machine interaction module to display in a third display mode that the temperature adjustment module is currently in an unheated state. The third display mode may include: the indicator light for indicating the operating state of the temperature adjustment module is not lighted, and/or the display area for indicating the operating state of the temperature adjustment module indicates that the temperature adjustment module is currently in an unheated state in a text or graphic manner.

The control module determines that the temperature adjustment module is enabled if the user indicates that the temperature adjustment module is enabled and detects that a heated power block of the temperature adjustment module is available. When it is determined that the temperature adjustment module is enabled (as indicated by "Y" in fig. 5), then block 530 is passed. In block 530, the control module receives a real-time detection signal for the local temperature around the gobo from the temperature sensor of the temperature regulation control module to monitor that the local temperature around the gobo remains above a predefined temperature threshold. The predefined temperature threshold may be selected based on the material of the gobo to ensure that the gobo is operating in a normal operating state. For example, the predefined temperature threshold may be set at-10 ℃.

In block 540, the control module compares the received real-time detection signal for the local temperature around the gobo with a predefined temperature threshold.

If the control module determines that the local temperature T _rel around the light shielding sheet detected in real time is less than or equal to the predefined temperature threshold T _th (as indicated by "Y" in fig. 5), then it goes to block 550, where the control module outputs a control signal to the heating control switch to cause the heating control switch to switch on the electrical connection between the heating power block and the heating membrane to heat the light shielding sheet, and the control module outputs a control signal to the human-machine interaction module to cause the human-machine interaction module to display in the first display mode that the temperature adjustment module is currently in a heated state. The first display mode may include: the indicator light for indicating the working state of the temperature adjusting module emits red light, such as continuously emitting red light or intermittently emitting red light; and/or the display area for indicating the working state of the temperature regulating module indicates that the temperature regulating module is in a heating state currently in a text, graph, symbol and/or combination thereof.

If the control module determines that the local temperature T _rel surrounding the gobo detected in real time is above the predefined temperature threshold T _th (as represented by "N" in fig. 5), then it goes to block 560 where the control module outputs a control signal to the heating control switch to cause the heating control switch to break the electrical connection between the heating power block and the heating diaphragm, and the control module outputs a control signal to the human-machine interaction module to cause the human-machine interaction module to display in a second display mode that the temperature adjustment module is currently in a state of heating above the predefined temperature threshold. The second display module may include an indication lamp for indicating an operation state of the temperature adjustment module to emit green light, such as continuously emitting green light or intermittently emitting green light; and/or the display area for indicating the operational status of the temperature adjustment module indicates, in text, graphics, symbols, and/or combinations thereof, that the temperature adjustment module is currently in a state of heating above a predefined temperature threshold.

After the process of block 550 or block 560 is completed, the process returns to block 510 (as represented by junction S in fig. 5) and the associated processes of blocks 510-560 are repeated to ensure that the automatic dimming filter automatically performs temperature maintenance and to allow the wearer to know the current operating state of the temperature adjustment module in real time and to deactivate or re-activate the temperature adjustment function as desired.

While an automatic darkening filter and welding helmet equipped therewith in accordance with the principles of the present application have been described and illustrated in connection with preferred embodiments known to the inventors, the present disclosure is not intended to be limited to the specifically disclosed embodiments. Rather, various modifications, substitutions and/or alterations to the disclosed embodiments may be made by those skilled in the art without departing from the spirit and principles of this disclosure, and it is also intended that the present disclosure be practiced in a manner other than as described herein.

Claims (10)

1. An automatic dimming filter for welding protection, characterized by comprising:

an arc sensing module configured to detect welding arcs;

The control module is electrically connected with the arc light sensing module to receive a detection signal from the arc light sensing module, and is configured to modulate a control signal output to the light-changing protection module based on the detection signal;

A light-changing protection module including a light shielding sheet for adjusting a light flux passing through the automatic light-changing filter and a light-changing driving circuit for driving the light shielding sheet, the light-changing driving circuit being electrically connected to the control module to drive the light shielding sheet to change light transmittance in response to a control signal from the control module; and

And the temperature adjusting module is electrically connected with the control module and is configured for keeping the local temperature around the shading sheet above a predefined temperature threshold.

2. The automatic darkening filter for weld protection of claim 1, wherein the temperature adjustment module comprises a heated membrane configured to generate heat around the light shield.

3. The automatic darkening filter for weld protection of claim 2, wherein the heating diaphragm comprises ITO coated glass and/or the heating diaphragm has a sheet resistance in the range of 5 ohms to 30 ohms.

4. An automatic darkening filter for weld protection as in claim 2 or 3 wherein the heating patch is disposed against the light shield and/or the heating patch is disposed on the wearer facing side of the automatic darkening filter containing the viewing window of the light shield.

5. The automatic darkening filter for weld protection of claim 4, wherein the temperature adjustment module further comprises a temperature sensor electrically connected to the control module for detecting a localized temperature around the gobo, wherein the temperature sensor is attached to the heated membrane.

6. The automatic darkening filter for weld protection of claim 5, wherein the temperature adjustment module further comprises a heating power block for energizing the heating diaphragm and a heating control switch electrically connected between the heating power block and the heating diaphragm.

7. The automatic darkening filter for weld protection of claim 6, wherein the heating control switch is electrically connected to the control module to turn on and off electrical connection of the heating power block to the heating diaphragm in response to a control signal from the control module.

8. The automatic darkening filter for weld protection of claim 7, further comprising a human-machine interaction module electrically connected to the control module and having a configuration that can be used by a wearer to indicate activation or deactivation of the temperature adjustment module and feedback to the wearer of the current operating state of the temperature adjustment module.

9. The automatic darkening filter for weld protection of claim 8, wherein,

The control module is configured to respond to a detection signal from the temperature sensor to indicate that the local temperature around the light shielding sheet is lower than or equal to a predefined temperature threshold value when the temperature regulation module is started, output a first control signal to the heating control switch to enable the heating control switch to be connected with the heating power supply block and the heating membrane electrically, and output a second control signal to the man-machine interaction module to enable the man-machine interaction module to display that the temperature regulation module is in a heating state currently in a first display mode; and/or

The control module is configured to respond to a detection signal from the temperature sensor to indicate that the local temperature around the light shielding sheet is higher than a predefined temperature threshold value when the temperature regulation module is started, output a third control signal to the heating control switch to enable the heating control switch to disconnect the electric connection between the heating power supply block and the heating membrane, and output a fourth control signal to the man-machine interaction module to enable the man-machine interaction module to display that the temperature regulation module is currently in a state of being heated to be higher than the predefined temperature threshold value in a second display mode; and/or

The control module is configured to output a fifth control signal to the man-machine interaction module to prompt the man-machine interaction module to display that the temperature adjustment module is currently in an unheated state in a third display mode when the temperature adjustment module is deactivated and/or the heating power supply block is detected to be unavailable.

10. A welding mask characterized by comprising a mask body configured to isolate a wearer's face from a welding-work local environment and the automatic darkening filter of any one of claims 1 to 9 removably attached to the mask body.