Gypsum-based board with heating function and production process thereof

Abstract

The invention provides a gypsum-based board with a heating function and a production process thereof, and relates to the technical field of gypsum boards, the gypsum-based board comprises a thermal insulation interlayer, a gypsum board substrate is adhered to one side of the thermal insulation interlayer, a reflecting film is adhered to one side, far away from the thermal insulation interlayer, of the gypsum board substrate, and an electrothermal film is adhered to one side, far away from the gypsum board substrate, of the reflecting film. A protective film is pasted on the side, away from the reflecting film, of the electrothermal film, and a facing layer wraps the outer sides of the heat preservation interlayer and the protective film. The electric heating film is arranged in the gypsum-based board, so that the gypsum-based board has a heating function, auxiliary adjustment of indoor temperature is achieved, double thermal resistance barriers are further formed through arrangement of the reflecting film and the heat preservation interlayer, directional conveying of heat generated by the electric heating film to the indoor space is greatly improved, and the indoor temperature of the gypsum-based board is increased. The heat dissipation amount of heat to the outside is reduced, the heat loss in the heating process is reduced, the heating efficiency is greatly improved in cooperation with a traditional heating mode, and the energy loss is reduced.

Description

Technical Field

[0001] This invention relates to the field of gypsum board technology, and in particular to a gypsum-based board with heating function and its production process. Background Technology

[0002] Gypsum board, as a common building decoration material, has good fire resistance, sound insulation, and durability, and is therefore widely used in the construction industry. However, traditional gypsum-based boards only have basic functions such as fire resistance and sound insulation, and do not have decorative or heating functions.

[0003] In areas with high demand for indoor heating, if traditional heating methods (such as radiators and underfloor heating) are used, indoor heating may not meet the standards and may be cold before and after the heating season. In addition, many places in the Yangtze River Basin do not have heating facilities and are very cold in winter. Furthermore, traditional gypsum-based heating boards lack temperature control functions, resulting in problems such as high energy consumption and poor temperature distribution uniformity. Summary of the Invention

[0004] This invention provides a gypsum-based board with heating function and its production process, in order to solve the defects of traditional gypsum-based boards in the prior art, which lack temperature control function, have high energy consumption and poor temperature distribution uniformity.

[0005] On one hand, the present invention provides a gypsum-based board with heating function, including a thermal insulation layer, a gypsum board substrate bonded to one side of the thermal insulation layer, a reflective film attached to the side of the gypsum board substrate away from the thermal insulation layer, an electric heating film attached to the side of the reflective film away from the gypsum board substrate, a protective film attached to the side of the electric heating film away from the reflective film, and a decorative layer wrapped around the thermal insulation layer and the protective film.

[0006] Preferably, the thermal insulation layer includes polyethylene insulation board, polystyrene foam board, high-performance melamine foam material, and high-strength continuous fiberglass fireproof insulation board.

[0007] Preferably, the electrothermal film includes a graphene electrothermal film and a semiconductor electrothermal film, and the heating power of the electrothermal film is 100W-500W.

[0008] Preferably, the heating power of the electrothermal film is controlled by a remote control system, the remote control system comprising:

[0009] The switch control module is used to control the opening and closing of the electric heating film;

[0010] The power control module is used to adjust the heating power of the electric heating film;

[0011] The safety protection module is used to perform safety protection actions when there is a safety hazard in the heating film.

[0012] Preferably, the power regulation module includes:

[0013] Temperature setting unit, used to set the target temperature of the heating film;

[0014] The first verification unit is used to verify whether the target temperature of the electric heating film is within the temperature adjustment range. If the target temperature of the electric heating film is not within the temperature adjustment range, an alarm for over-limit temperature adjustment will be triggered.

[0015] The first adjustment unit is used to perform the first adjustment step of the heating power of the electric heating film;

[0016] The second adjustment unit is used to perform a second adjustment step of the electrothermal film, the second adjustment step including adjusting the actual heating power of the electrothermal film to a second target heating power;

[0017] Where P2 is the second target heating power of the electric heating film; h is the comprehensive heat transfer coefficient between the electric heating film and the surrounding environment; A is the surface area of ​​the electric heating film on a single gypsum board; T b The target temperature of the heating film; T H γ represents the average temperature of the surrounding environment; γ represents the electrothermal conversion efficiency of the electrothermal film.

[0018] Preferably, the first adjustment step includes adjusting the actual heating power of the electrothermal film to a first target heating power and maintaining the first step for a certain duration. The first adjustment unit includes:

[0019] The first heating power calculation subunit is used to calculate the first target heating power of the electrothermal film.

[0020] Where P1 is the first target heating power of the electric heating film; m is the mass of a single electric heating film; C m t is the specific heat capacity of the heating film. r is the maximum allowable heating time of the electric heating film; h is the comprehensive heat transfer coefficient between the electric heating film and the surrounding environment; A is the surface area of ​​the electric heating film on a single gypsum board; T b The target temperature of the heating film; T H The average temperature of the surrounding environment is γ; the electrothermal conversion efficiency of the electrothermal film is γ; T d The current set temperature of the heating film; n is the temperature compensation coefficient;

[0021] The second verification subunit is used to verify whether the first heating target power is within the allowable operating power range of the electric heating film. If the first heating target power is greater than the upper limit of the allowable operating power range of the electric heating film, the first heating target power is reset to the upper limit of the allowable operating power range of the electric heating film. If the first heating target power is less than the lower limit of the allowable operating power range of the electric heating film, the first heating target power is reset to the lower limit of the allowable operating power range of the electric heating film.

[0022] The time calculation subunit is used to calculate the duration of the first step;

[0023] Among them, t s The duration of the first step; A is the surface area of ​​the heating film on a single gypsum board; L0 is the unit thickness; C q T is the unit thickness. b The target temperature of the heating film; T H The average temperature of the surrounding environment is given; P1 is the first target heating power of the electric heating film; t0 is the unit time; h is the comprehensive heat transfer coefficient between the electric heating film and the surrounding environment; T d γ represents the current set temperature of the heating film; γ represents the electrothermal conversion efficiency of the heating film; t r This is the maximum allowable heating time for the electric heating film.

[0024] Preferably, the safety hazards of the electric heating film include excessively high surface temperature and abnormal surface temperature fluctuations. Safety protection actions include audible and visual alarms, resetting the power setting, and cutting off the power supply. The safety protection module includes:

[0025] The temperature over-limit alarm unit will trigger the first alarm when the actual surface temperature of the heating film exceeds the preset maximum allowable temperature threshold.

[0026] The temperature fluctuation alarm unit will trigger a second alarm when the deviation between the actual surface temperature of the heating film and the target temperature of the heating film exceeds a preset deviation threshold.

[0027] The alarm classification unit divides the first alarm into three alarm levels based on the over-temperature value of the actual surface temperature of the heating film, and divides the second alarm into three alarm levels based on the over-limit value of the fluctuation of the actual surface temperature of the heating film, and executes the corresponding safety protection action according to the alarm level.

[0028] T1 = T S -T M Where T1 is the overheat value of the actual surface temperature of the heating film; T S T represents the actual surface temperature of the heating film. M This is the maximum permissible temperature threshold.

[0029] T2=|T S -T b |-T Z Where T2 is the maximum allowable fluctuation of the actual surface temperature of the heating film; T S T represents the actual surface temperature of the heating film. b The target temperature of the heating film; T Z is the maximum allowable fluctuation value of the surface temperature of the heating film; || is the absolute value symbol.

[0030] On the other hand, the present invention also provides a manufacturing process for a gypsum-based board with a heating function, for producing the above-mentioned gypsum-based board with a heating function, comprising:

[0031] Step S1: Drill mounting holes in the gypsum board substrate and remove debris from the mounting holes;

[0032] Step S2: On one side of the gypsum board substrate, attach the reflective film, the electric heating film, and the protective film in sequence;

[0033] Step S3: Attach the thermal insulation layer to the other side of the gypsum board substrate;

[0034] Step S4: Connect the heating film using snap-fit ​​or soldering methods and perform electrical performance testing;

[0035] Step S5: Spray an insulating layer onto the wiring area and perform insulation performance testing;

[0036] Step S6: Fill the mounting hole with filler material;

[0037] Step S7: Fully cover the surface layer and perform an appearance inspection.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] By incorporating an electric heating film within the gypsum board, the gypsum board gains a heating function, thus enabling auxiliary regulation of indoor temperature. Furthermore, the inclusion of a reflective film utilizes infrared reflection to directionally reflect over 90% of the radiant heat energy into the room. Combined with a porous, closed-cell insulation layer such as polyethylene / polystyrene, a double thermal barrier is formed, significantly improving the directional transfer of heat generated by the electric heating film into the room and reducing heat loss to the outside. This reduces heat loss during the heating process. When used in conjunction with traditional heating methods, it significantly improves heating efficiency and reduces energy consumption. The auxiliary heating provided by the gypsum board also improves the uniformity of heat source distribution, thereby enhancing the uniformity of indoor temperature distribution. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of the present invention.

[0042] Figure label:

[0043] 1. Thermal insulation layer; 2. Gypsum board substrate; 3. Reflective film; 4. Electrothermal film; 5. Protective film; 6. Finishing layer. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0045] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0046] Example 1

[0047] This invention provides a gypsum-based board with a heating function, such as... Figure 1 As shown, it includes a thermal insulation layer 1, a gypsum board substrate 2 is bonded to one side of the thermal insulation layer 1, a reflective film 3 is attached to the side of the gypsum board substrate 2 away from the thermal insulation layer 1, an electric heating film 4 is attached to the side of the reflective film 3 away from the gypsum board substrate 2, a protective film 5 is attached to the side of the electric heating film 4 away from the reflective film 3, and a decorative layer 6 is wrapped around the outside of the thermal insulation layer 1 and the protective film 5.

[0048] Preferably, the thermal insulation layer 1 includes a polyethylene insulation board, a polystyrene foam board, a high-performance melamine foam material, and a high-strength continuous fiberglass fireproof insulation board.

[0049] Preferably, the electrothermal film 4 includes a graphene electrothermal film 4 and a semiconductor electrothermal film 4, and the heating power of the electrothermal film 4 is 100W-500W.

[0050] In this embodiment, the reflective film 3 is a material, such as aluminum foil, that reduces energy loss by reflecting heat.

[0051] The beneficial effects of the above technical solution are as follows:

[0052] By incorporating an electric heating film 4 within the gypsum board, the gypsum board gains a heating function, thus enabling auxiliary regulation of indoor temperature. Furthermore, the reflective film 3, through infrared reflection, directs over 90% of the radiant heat energy into the room. Combined with a porous, closed-cell insulation layer such as polyethylene / polystyrene, a double thermal resistance barrier is formed, significantly improving the directional transfer of heat generated by the electric heating film 4 into the room and reducing heat loss to the outside. This reduces heat loss during the heating process. When used in conjunction with traditional heating methods, heating efficiency is greatly improved, and energy consumption is reduced. Auxiliary heating through the gypsum board enhances the uniformity of heat source distribution, thereby improving the uniformity of indoor temperature distribution.

[0053] Example 2

[0054] Based on Example 1, the heating film 4 controls its heating power using a remote control system, which includes:

[0055] The switch control module is used to control the opening and closing of the electric heating film 4;

[0056] The power control module is used to adjust the heating power of the electric heating film 4;

[0057] The safety protection module is used to perform safety protection actions when there is a safety hazard in the heating film 4.

[0058] Preferably, the power regulation module includes:

[0059] Temperature setting unit, used to set the target temperature of the heating film 4;

[0060] The first verification unit is used to verify whether the target temperature of the electric heating film 4 is within the temperature adjustment range. If the target temperature of the electric heating film 4 is not within the temperature adjustment range, an alarm for over-limit temperature adjustment will be triggered.

[0061] The first adjustment unit is used to perform the first adjustment step of the heating power of the electric heating film 4;

[0062] The second adjustment unit is used to perform the second adjustment step of the electric heating film 4. The second adjustment step includes adjusting the actual heating power of the electric heating film 4 to the second target heating power.

[0063] Wherein, P2 is the second target heating power of the electric heating film 4; h is the comprehensive heat transfer coefficient between the electric heating film 4 and the surrounding environment; A is the surface area of ​​the electric heating film 4 on a single gypsum board; T b The target temperature for the heating film 4; T H γ represents the average temperature of the surrounding environment; γ represents the electrothermal conversion efficiency of the electrothermal film 4.

[0064] Preferably, the first adjustment step includes adjusting the actual heating power of the electric heating film 4 to a first target heating power and maintaining the first step for a certain duration. The first adjustment unit includes:

[0065] The first heating power calculation subunit is used to calculate the first target heating power of the electric heating film 4.

[0066] Where P1 is the first target heating power of the electric heating film 4; m is the mass of a single electric heating film 4; C m t is the specific heat capacity of the heating film 4. r is the maximum allowable heating time of the electric heating film 4; h is the comprehensive heat transfer coefficient between the electric heating film 4 and the surrounding environment; A is the surface area of ​​the electric heating film 4 on a single gypsum board; T b The target temperature for the heating film 4; T H The average temperature of the surrounding environment is γ; the electrothermal conversion efficiency of the electrothermal film 4 is γ; T d is the current set temperature of the heating film 4; n is the temperature compensation coefficient;

[0067] The second verification subunit is used to verify whether the first heating target power is within the allowable operating power range of the electric heating film 4. If the first heating target power is greater than the upper limit of the allowable operating power range of the electric heating film 4, the first heating target power is reset to the upper limit of the allowable operating power range of the electric heating film 4. If the first heating target power is less than the lower limit of the allowable operating power range of the electric heating film 4, the first heating target power is reset to the lower limit of the allowable operating power range of the electric heating film 4.

[0068] The time calculation subunit is used to calculate the duration of the first step;

[0069] Among them, t s The duration of the first step; A is the surface area of ​​the electric heating film 4 on a single gypsum board; L0 is the unit thickness; C q T is the unit thickness. b The target temperature for the heating film 4; T H P1 is the average temperature of the surrounding environment; t0 is the first target heating power of the electric heating film 4; h is the combined heat transfer coefficient between the electric heating film 4 and the surrounding environment; T is the average temperature of the surrounding environment. d γ represents the current set temperature of the heating film 4; γ represents the electrothermal conversion efficiency of the heating film 4; t r This is the maximum allowable heating time for the electric heating film 4.

[0070] In this embodiment, the overall heat transfer coefficient between the electric heating film 4 and the surrounding environment is a preset value, which is the overall heat transfer coefficient between the electric heating film 4 and the ambient air under natural conditions. The specific value is obtained based on experiments.

[0071] In this embodiment, the average ambient temperature is obtained by the controller.

[0072] In this embodiment, the temperature compensation coefficient is the coefficient value used when performing the first adjustment step to compensate for the set temperature, which is determined based on the change value of the set temperature of the electric heating film 4 when calculating the first target heating power. For example, when the set temperature of the electric heating film 4 increases from 25°C to 28°C, when n = 1.5, the set temperature compensation corresponding to the first adjustment step is 2°C.

[0073] The beneficial effects of the above technical solution are as follows:

[0074] By dividing the power adjustment process into a first adjustment step and a second adjustment step, the change in heat generation per unit time of the gypsum-based board is increased by compensating for the set temperature (T_b-T_d / n) during the first adjustment step. This allows for a rapid coarse adjustment of the actual temperature of the electric heating film 4, bringing it closer to the target temperature. This shortens the duration of the first adjustment step and improves the response speed of temperature adjustment. The second adjustment step then performs fine adjustment of the temperature, thereby improving the accuracy of temperature adjustment, enhancing the stability of temperature control of the electric heating film 4, reducing the probability of failure of the electric heating film 4, extending the service life of the electric heating film 4, and improving the uniformity of indoor temperature distribution. Through dual verification of the allowable temperature range and the upper and lower power limits, the operating parameters of the electric heating film 4 are ensured to be within the allowable range, improving the safety of the electric heating film 4 during use.

[0075] Example 3

[0076] Based on Example 2, the safety hazards of the electric heating film 4 include excessively high surface temperature and abnormal surface temperature fluctuations. Safety protection actions include audible and visual alarms, resetting the power setting, and cutting off the power supply. The safety protection module includes:

[0077] The temperature over-limit alarm unit will trigger the first alarm when the actual surface temperature of the electric heating film 4 exceeds the preset maximum allowable temperature threshold.

[0078] The temperature fluctuation alarm unit will trigger a second alarm when the deviation between the actual surface temperature of the heating film 4 and the target temperature of the heating film 4 exceeds a preset deviation threshold.

[0079] The alarm classification unit divides the first alarm into three alarm levels based on the over-temperature value of the actual surface temperature of the electric heating film 4, and divides the second alarm into three alarm levels based on the over-limit value of the fluctuation of the actual surface temperature of the electric heating film 4, and executes the corresponding safety protection action according to the alarm level.

[0080] T1 = T S -T M Where T1 is the overheat value of the actual surface temperature of the heating film 4; TS T represents the actual surface temperature of the heating film 4. M This is the maximum permissible temperature threshold.

[0081] T2=|T S -T b |-T Z Where T2 is the actual surface temperature fluctuation exceeding the limit of the electrothermal film 4; T S T represents the actual surface temperature of the heating film 4. b The target temperature for the heating film 4; T Z is the maximum allowable fluctuation value of the surface temperature of the heating film 4; || is the absolute value symbol.

[0082] In this embodiment, the maximum permissible temperature threshold refers to the highest temperature that the heating film 4 can withstand during normal operation.

[0083] The beneficial effects of the above technical solution are as follows:

[0084] Based on the over-temperature value and fluctuation limit value of the electric heating film 4, the first alarm and the second alarm are divided into three alarm levels respectively. The corresponding safety protection action is automatically matched and executed according to the alarm level, so as to realize the automatic triggering of safety protection actions when the electric heating film 4 malfunctions or has hidden dangers, thereby improving the safety of the electric heating film 4 during use.

[0085] Example 4

[0086] This invention also provides a manufacturing process for a gypsum-based board with a heating function, used to produce a gypsum-based board with a heating function as described in any one of Examples 1-3, comprising:

[0087] Step S1: Drill mounting holes in the gypsum board substrate 2 and remove debris from the mounting holes;

[0088] Step S2: On one side of the gypsum board substrate 2, attach the reflective film 3, the electric heating film 4, and the protective film 5 in sequence;

[0089] Step S3: Attach the thermal insulation layer 1 to the other side of the gypsum board substrate;

[0090] Step S4: Connect the heating film 4 using a snap-fit ​​or soldering method and perform electrical performance testing;

[0091] Step S5: Spray an insulating layer onto the wiring area and perform insulation performance testing;

[0092] Step S6: Fill the mounting hole with filler material;

[0093] Step S7: Fully cover the finishing layer 6 and perform an appearance inspection.

[0094] The beneficial effects of the above technical solution are as follows:

[0095] Multiple tests during the manufacturing process ensured the stable installation and reliable electrical performance of the heating film 4. The snap-fit ​​or welded wiring and insulation coating process effectively prevented electrical short circuits and overheating, significantly improving the safety of the gypsum board.

[0096] The reflective film 3 improves the heating efficiency of the electric heating film 4, effectively avoids heat waste, ensures uniform heating, and enhances indoor warmth and comfort. The insulation layer further improves the insulation effect of the gypsum-based board.

[0097] By covering the outermost layer with a decorative layer 6, not only is the appearance of the gypsum board guaranteed, but the internal components are also effectively protected, improving the product's durability and resistance to damage.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gypsum-based board with a heating function, characterized in that, The insulation layer (1) is attached to one side of the insulation layer (1), a gypsum board substrate (2) is attached to one side of the gypsum board substrate (2), a reflective film (3) is attached to the side of the gypsum board substrate (2) away from the insulation layer (1), an electric heating film (4) is attached to the side of the reflective film (3) away from the gypsum board substrate (2), a protective film (5) is attached to the side of the electric heating film (4) away from the reflective film (3), and a decorative layer (6) is wrapped around the outside of the insulation layer (1) and the protective film (5).

2. The gypsum-based board with heating function according to claim 1, characterized in that, The thermal insulation layer (1) includes polyethylene insulation board, polystyrene foam board, high-performance melamine foam material and high-strength continuous fiberglass fireproof insulation board.

3. The gypsum-based board with heating function according to claim 1, characterized in that, The electrothermal film (4) includes a graphene electrothermal film (4) and a semiconductor electrothermal film (4), and the heating power of the electrothermal film (4) is 100W-500W.

4. A gypsum-based board with heating function according to claim 1, characterized in that, The electric heating film (4) is controlled by a remote control system to control its switching and heating power. The remote control system includes: The switch control module is used to control the opening and closing of the electric heating film (4); The power control module is used to adjust the heating power of the electric heating film (4); The safety protection module is used to perform safety protection actions when there is a safety hazard in the electric heating film (4).

5. A gypsum-based board with heating function according to claim 4, characterized in that, The power regulation module includes: Temperature setting unit, used to set the target temperature of the heating film (4); The first verification unit is used to verify whether the target temperature of the electric heating film (4) is within the temperature adjustment range. If the target temperature of the electric heating film (4) is not within the temperature adjustment range, an alarm for over-limit temperature adjustment will be triggered. The first adjustment unit is used to perform the first adjustment step of the heating power of the electric heating film (4); The second adjustment unit is used to perform a second adjustment step of the electric heating film (4), the second adjustment step including adjusting the actual heating power of the electric heating film (4) to a second target heating power; Wherein, P2 is the second target heating power of the electric heating film (4); h is the comprehensive heat transfer coefficient between the electric heating film (4) and the surrounding environment; A is the surface area of ​​the electric heating film (4) of a single gypsum board; T b The target temperature of the electrothermal film (4); T H γ is the average temperature of the surrounding environment; γ is the electrothermal conversion efficiency of the electrothermal film (4).

6. A gypsum-based board with heating function according to claim 5, characterized in that, The first adjustment step includes adjusting the actual heating power of the electrothermal film (4) to a first target heating power and maintaining the first step for a certain duration. The first adjustment unit includes: The first heating power calculation subunit is used to calculate the first target heating power of the electric heating film (4); Wherein, P1 is the first target heating power of the electric heating film (4); m is the mass of a single electric heating film (4); C m The specific heat capacity of the heating film (4); t r T is the maximum allowable heating time of the electric heating film (4); h is the comprehensive heat transfer coefficient between the electric heating film (4) and the surrounding environment; A is the surface area of ​​the electric heating film (4) of a single gypsum board; T b The target temperature of the electrothermal film (4); T H The average temperature of the surrounding environment is γ; the electrothermal conversion efficiency of the electrothermal film (4) is γ; T d The current set temperature of the heating film (4); n is the temperature compensation coefficient; The second verification subunit is used to verify whether the first heating target power is within the allowable working power range of the electric heating film (4). If the first heating target power is greater than the upper limit of the allowable working power range of the electric heating film (4), the first heating target power is reset to the upper limit of the allowable working power range of the electric heating film (4). If the first heating target power is less than the lower limit of the allowable working power range of the electric heating film (4), the first heating target power is reset to the lower limit of the allowable working power range of the electric heating film (4). The time calculation subunit is used to calculate the duration of the first step; Among them, t s The duration of the first step; A is the surface area of ​​the electric heating film (4) of a single gypsum board; L0 is the unit thickness; C q Unit thickness; T b The target temperature of the electrothermal film (4); T H The average temperature of the surrounding environment is given by P1; the first target heating power of the electric heating film (4) is given by t0; the unit time is given by h; and the comprehensive heat transfer coefficient between the electric heating film (4) and the surrounding environment is given by T. d γ is the current set temperature of the heating film (4); γ is the electrothermal conversion efficiency of the heating film (4); t r The maximum allowable heating time for the electric heating film (4) is denoted as .

7. A gypsum-based board with heating function according to claim 5, characterized in that, Safety hazards of the electric heating film (4) include excessively high surface temperature and abnormal fluctuations in surface temperature. Safety protection actions include audible and visual alarms, resetting the power setting value, and cutting off the power supply. The safety protection module includes: The temperature over-limit alarm unit will trigger the first alarm when the actual surface temperature of the electric heating film (4) exceeds the preset maximum allowable temperature threshold. The temperature fluctuation alarm unit will trigger a second alarm when the deviation between the actual surface temperature of the heating film (4) and the target temperature of the heating film (4) is greater than the preset deviation threshold. The alarm classification unit divides the first alarm into three alarm levels based on the over-temperature value of the actual surface temperature of the electric heating film (4), and divides the second alarm into three alarm levels based on the over-limit value of the fluctuation of the actual surface temperature of the electric heating film (4), and performs corresponding safety protection actions according to the alarm level. T1 = T S -T M Where T1 is the overheat value of the actual surface temperature of the electrothermal film (4); T S T represents the actual surface temperature of the electrothermal film (4); M This is the maximum permissible temperature threshold. T2=|T S -T b |-T Z Where T2 is the actual surface temperature fluctuation exceeding the limit of the electrothermal film (4); T S T represents the actual surface temperature of the electrothermal film (4); b The target temperature of the electrothermal film (4); T Z is the maximum allowable fluctuation value of the surface temperature of the electrothermal film (4); || is the absolute value symbol.

8. A production process for a gypsum-based board with a heating function, used to produce a gypsum-based board with a heating function as described in any one of claims 1-7, characterized in that, include: Step S1: Drill mounting holes on the gypsum board substrate (2) and remove debris from the mounting holes; Step S2: On one side of the gypsum board substrate (2), a reflective film (3), an electrothermal film (4), and a protective film (5) are pasted in sequence; Step S3: Adhere the thermal insulation layer (1) to the other side of the gypsum board substrate; Step S4: Connect the heating film (4) by snap-fit ​​or welding and perform electrical performance testing; Step S5: Spray an insulating layer onto the wiring area and perform insulation performance testing; Step S6: Fill the mounting hole with filler material; Step S7: Fully cover the finishing layer (6) and perform appearance inspection.

Images