Industrial heating equipment

Abstract

The utility model provides industrial heating equipment, relates to the technical field of heating equipment, and discloses the industrial heating equipment which comprises a water storage tank; the thick film heating system is provided with a water inlet end and a water outlet end, and the water inlet end and the water outlet end of the thick film heating system are both communicated with the water storage tank; the thick film heating system is used for pumping water in the water storage tank, heating the water and then conveying the water into the water storage tank again so as to heat the water in the water storage tank. The water storage tank and the thick film heating system are arranged, the water inlet end and the water outlet end of the thick film heating system communicate with the water storage tank, the thick film heating system is used for pumping water in the water storage tank for heating and then conveying the water into the water storage tank again so as to heat the water in the water storage tank, and the thick film heating system adopts a thick film device for electric heating; the heating efficiency can be effectively improved, the energy consumption is reduced, the environmental pollution is reduced, and meanwhile, the safety in the using process is ensured.

Description

Technical Field

[0001] This application relates to the technical field of heating equipment, and particularly to an industrial heating equipment. Background Art

[0002] In the current industrial field, the widely used water circulation heating equipment mainly relies on combustibles for heating. Inevitably, a large amount of waste gas and particulate matter will be generated during this process, which has a significant adverse impact on air quality. In addition, although air energy as a heating method has many advantages, its usage efficiency is extremely vulnerable to environmental temperature constraints. Especially in winter, its energy efficiency often shows an obvious downward trend.

[0003] At the same time, traditional electric heating wire heating technology, although simple to operate, has relatively low efficiency in the process of converting electrical energy into heat energy. And due to the non-separation characteristic in the design of water and electricity, there are certain potential safety risks that cannot be ignored. Utility Model Content

[0004] The main purpose of this utility model is to provide an industrial heating equipment, aiming to improve heating efficiency, reduce energy consumption, and reduce environmental pollution, while ensuring safety during use.

[0005] To achieve the above object, this utility model provides an industrial heating equipment, which includes:

[0006] A water storage tank;

[0007] A thick film heating system, which has a water inlet end and a water outlet end, and both the water inlet end and the water outlet end of the thick film heating system are communicated with the water storage tank;

[0008] The thick film heating system is used to extract the water in the water storage tank for heating and then re-transport it to the water storage tank to heat the water in the water storage tank.

[0009] Optionally, the thick film heating system includes:

[0010] A thick film heating device, which has a water inlet end and a water outlet end, and the water inlet end and the water outlet end of the thick film heating device are respectively communicated with the water storage tank through connecting pipelines;

[0011] A water pump, which is arranged on the connecting pipeline and is used to drive the water in the water storage tank to be heated by the thick film heating device and then re-transport it to the water storage tank.

[0012] Optionally, the thick film heating device includes a heating pipe, and a thick film layer is arranged on the pipe wall of the heating pipe. The heating pipe is respectively communicated with the water storage tank through the connecting pipeline;

[0013] The thick film layer is used to heat the water flowing through the heating pipe when powered on;

[0014] The thick film layer is provided on the inner wall of the heating pipe, or the thick film layer is provided on the outer wall of the heating pipe, or the thick film layer is provided between the wall sandwich layers of the heating pipe.

[0015] Optionally, a spiral channel is formed in the heating pipe, and the spiral channel spirally extends from the water inlet end to the water outlet end of the heating pipe;

[0016] A stud is provided in the heating pipe, and the stud extends from the water inlet end to the water outlet end of the heating pipe, so that the spiral channel is formed in the heating pipe.

[0017] Optionally, the number of the heating pipes is multiple, each heating pipe has a first end and a second end, the first ends of the multiple heating pipes are interconnected and configured to form a first water inlet end, the second ends of the multiple heating pipes are interconnected and configured to form a first water outlet end, and the first water inlet end and the first water outlet end are respectively communicated with the water storage tank through the connecting pipeline;

[0018] The first ends of the multiple heating pipes are interconnected through a first return pipe, the first return pipe is configured to form the first water inlet end, and / or the second ends of the multiple heating pipes are interconnected through a second return pipe, the second return pipe is configured to form the first water outlet end.

[0019] Optionally, a water outlet and a water return port are vertically distributed on one side of the water storage tank, the water outlet is used to connect to the water inlet end of the water using device, and the water return port is used to connect to the water outlet end of the water using device;

[0020] And / or

[0021] The water storage tank is provided with an overflow port at the upper part, and the overflow port is used to discharge water outside the water storage tank when the water level in the water storage tank is too high.

[0022] And / or

[0023] The water storage tank is provided with a maintenance port and a sealing cover at the top, and the maintenance port is used for users to enter the water storage tank for maintenance.

[0024] And / or

[0025] The bottom of the water storage tank is provided with a drainage outlet for discharging the water in the water storage tank, and a drainage conduit is connected through the drainage outlet.

[0026] Optionally, the industrial heating device further includes:

[0027] Detection circuit, the detection circuit includes a temperature sensor, the temperature sensor is arranged in the water storage tank, and the detection circuit is used to detect the water temperature in the water storage tank and output a corresponding water temperature signal;

[0028] Control circuit, the first input end of the control circuit is connected to the first output end of the detection circuit, and the control circuit is used to control the heating temperature of the thick film heating device according to the water temperature signal.

[0029] Optionally, the detection circuit includes a liquid level sensor, the liquid level sensor is arranged in the water storage tank, and the liquid level sensor is used to detect the water level in the water storage tank and output a corresponding liquid level signal to the control circuit;

[0030] A water replenishing device is arranged at the top of the water storage tank, the water replenishing device includes a solenoid valve, and the water outlet end of the solenoid valve is connected to the top of the water tank;

[0031] The control circuit is used to control the solenoid valve to open when the liquid level signal is the low water level threshold value to replenish water to the water storage tank.

[0032] Optionally, the thick film heating system includes:

[0033] Thick film heating device, the thick film heating device includes a plurality of heating tubes, a thick film layer is arranged on the tube wall of each heating tube, each heating tube has a first end and a second end, the first ends of the plurality of heating tubes communicate with each other and form a first water inlet end, the second ends of the plurality of heating tubes communicate with each other and form a first water outlet end, and the first water inlet end and the first water outlet end are respectively communicated with the water storage tank through a connecting pipeline; the thick film layer is used to heat the water flowing through the heating tube when electrified;

[0034] A water pump is arranged on the connecting pipeline and is used to drive the water in the water storage tank to be heated by the thick film heating device and then re-transported to the water storage tank;

[0035] The temperature sensors are respectively arranged at the first water inlet end and the first water outlet end, and the control circuit is used to control the heating temperature of the thick film heating device according to the water temperature signals of the first water inlet end and the first water outlet end detected by the temperature sensors.

[0036] Optionally, a temperature sensor is arranged on each heating tube, and the control circuit is used to control the heating tube to turn off when the heating tube temperature signal exceeds the temperature protection threshold value;

[0037] And / or,

[0038] A temperature control switch is provided on each of the heating tubes. The temperature control switch is connected in series between the power supply and the power input end of the heating tube. The temperature control switch is used to disconnect the path between the heating tube and the power supply when the temperature signal of the heating tube exceeds the temperature protection threshold, so as to turn off the heating tube.

[0039] In the embodiment of the present utility model, a water storage tank and a thick film heating system are provided, and both the water inlet end and the water outlet end of the thick film heating system are communicated with the water storage tank. The thick film heating system is used to extract the water in the water storage tank for heating and then re-transmit it to the water storage tank to heat the water in the water storage tank. The thick film heating system in it uses thick film devices for electric heating, which can not only effectively improve the heating efficiency, reduce energy consumption, and reduce environmental pollution, but also ensure the safety during use. In addition, since the components of the thick film heating system are small in volume, the overall volume of the device can be greatly reduced. Description of the Drawings

[0040] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0042] Figure 1 It is a schematic structural diagram of an industrial heating device according to an embodiment of the present utility model;

[0043] Figure 2 It is a schematic structural diagram of an industrial heating device according to another embodiment of the present utility model;

[0044] Figure 3 It is a schematic structural diagram of an industrial heating device according to still another embodiment of the present utility model;

[0045] Figure 4 It is a schematic structural diagram of an industrial heating device according to yet another embodiment of the present utility model;

[0046] Figure 5 It is a schematic structural diagram of an industrial heating device according to still another embodiment of the present utility model;

[0047] Figure 6 It is a schematic structural diagram of an industrial heating device according to another embodiment of the present utility model;

[0048] Figure 7Structural schematic diagram of an industrial heating device according to another embodiment of the present utility model;

[0049] Figure 8 Structural schematic diagram of an industrial heating device according to still another embodiment of the present utility model;

[0050] Figure 9 Structural schematic diagram of an industrial heating device according to yet another embodiment of the present utility model;

[0051] Figure 10 Structural schematic diagram of an industrial heating device according to another embodiment of the present utility model;

[0052] Figure 11 Circuit structure block diagram of an industrial heating device according to another embodiment of the present utility model;

[0053] Figure 12 For Figure 11 Circuit structure block diagram of the detection circuit in

[0054] Figure 13 Circuit structure block diagram of an industrial heating device according to still another embodiment of the present utility model;

[0055] Figure 14 Figure 13 Hardware structure schematic diagram of

[0056] Figure 15 For Figure 12 Circuit structure block diagram with a temperature control switch set in

[0057] Explanation of the reference numerals in the drawings:

[0058]

[0059]

[0060] The realization, functional features and advantages of the object of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0061] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Well-known modules, units, and their connections, links, communications, or operations therebetween are not shown or not described in detail. Moreover, the described features, architectures, or functions can be combined in any manner in one or more embodiments. Those skilled in the art should understand that the following various embodiments are only for illustration, rather than for limiting the protection scope of the present utility model. It can also be easily understood that the modules, units, or processing methods in the various embodiments described herein and shown in the drawings can be combined and designed in various different configurations. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.

[0062] For the definitions of various nouns or methods referred to in the following embodiments, unless it is logically impossible to hold, the nouns or methods generally refer to the broad concepts that can be implemented on the premise of the content disclosed in the embodiments. Under such an understanding, all specific lower-level specific definitions of the nouns or methods should be regarded as the content of the present utility model, and should not be narrowly understood or prejudicially interpreted on the grounds that the specific definition is not disclosed in the specification. Similarly, on the premise that it can be logically realized, the order of the steps in the method is flexible and changeable, and all specific lower-level specific definitions in the broad concepts of various nouns or methods belong to the protection scope of the present utility model.

[0063] The main solution of the embodiments of the present application is: by providing a water storage tank and a thick film heating system, and connecting both the water inlet end and the water outlet end of the thick film heating system to the water storage tank, the thick film heating system is used to extract the water in the water storage tank for heating and then re-transport it to the water storage tank to heat the water in the water storage tank.

[0064] Due to the existing water circulation heating equipment, it mainly relies on combustibles for heating, and inevitably generates a large amount of waste gas and particulate matter during this process, which has a significant adverse impact on air quality. In addition, although air energy as a heating method has many advantages, its use efficiency is extremely vulnerable to environmental temperature constraints. Especially in winter, its energy efficiency often shows an obvious downward trend. And the traditional electric heating wire heating technology, although simple to operate, has relatively low efficiency in the process of converting electrical energy into heat energy, and there are certain potential safety risks due to the non-separation characteristic of the water and electricity design.

[0065] This application provides a solution that can effectively improve the heating efficiency, reduce energy consumption, and lower environmental pollution, while also ensuring safety during use. In addition, due to the small size of the components that make up the thick-film heating system, the overall volume of the device can be greatly reduced.

[0066] Referring to Figure 1 , in an embodiment of the present utility model, an industrial heating device includes a water storage tank 100 and a thick-film heating system 200, where:

[0067] The thick-film heating system 200 has a water inlet end and a water outlet end, and both the water inlet end and the water outlet end of the thick-film heating system 200 are connected to the water storage tank 100; the thick-film heating system 200 is used to extract water from the water storage tank 100, heat it, and then re-transport it to the water storage tank 100 to heat the water in the water storage tank 100.

[0068] In this embodiment, the thick-film heating system 200 can be integrated with efficient heating elements inside, such as thick-film resistance heaters. When an electric current passes through, these thick-film resistance heaters convert electrical energy into heat energy and transfer the heat energy to the water flowing through them, quickly and evenly heating the passing water flow. And the thick-film heating system 200 continuously extracts water from the water storage tank 100 for heating and then transports it back to the water storage tank 100 to complete multiple water circulation heating processes. Since the thick-film heating system 200 separates water and electricity and only conducts heat exchange, it can better implement the circulating water heating technology with water and electricity separation, solving the leakage and fire risk problems existing in the current market application of traditional electric heating tubes for heating water in water tanks.

[0069] In this embodiment, in order to provide excellent heat preservation performance, effectively reduce heat loss, thereby improving the overall heating efficiency and reducing energy consumption, the water storage tank 100 is set as a stainless-steel double-layer heat-insulated water tank. The outer layer of stainless-steel material is not only corrosion-resistant and wear-resistant but also has good structural strength, ensuring the stable operation of the water storage tank 100 under various working conditions. The inner layer of stainless-steel material can be made of food-grade or industrial-grade stainless steel according to needs, suitable for storing and heating a variety of different media, guaranteeing the hygiene and safety of the product.

[0070] In this embodiment, by providing a water storage tank 100 and a thick-film heating system 200, and connecting both the water inlet end and the water outlet end of the thick-film heating system 200 to the water storage tank 100, the thick-film heating system 200 is used to extract water from the water storage tank 100, heat it, and then re-transport it to the water storage tank 100 to heat the water in the water storage tank 100. The thick-film heating system 200 in it uses thick-film devices for electric heating, which can not only effectively improve the heating efficiency, reduce energy consumption, and lower environmental pollution, but also ensure safety during use. In addition, due to the small size of the components that make up the thick-film heating system 200, the overall volume of the device can be greatly reduced.

[0071] Optionally, referring to Figure 2 , another embodiment of the present utility model provides an industrial heating device. Based on the above Figure 1 illustrated embodiment, the thick film heating system 200 includes a thick film heating device 210 and a water pump 220, wherein:

[0072] The thick film heating device 210 has a water inlet end and a water outlet end. The water inlet end and the water outlet end of the thick film heating device 210 are respectively communicated with the water storage tank 100 through a connecting pipeline; the water pump 220 is arranged on the connecting pipeline and is used for driving the water in the water storage tank 100 to be heated by the thick film heating device 210 and then re-transported to the water storage tank 100.

[0073] In this embodiment, the water pump 220 serves as a power source, and its precise and efficient working performance ensures the continuous circulation and heating of the water flow. Driven by the water pump 220, the water in the water storage tank 100 is continuously extracted and sent to the water inlet end of the thick film heating device 210, and then undergoes a rapid and uniform heating process inside the heating device. The heated water is then re-transported back to the water storage tank 100 through the water outlet end and the connecting pipeline, forming a closed-loop water circulation heating system. This design not only optimizes the water flow path, improves the heating efficiency, but also further ensures the uniformity and stability of heating.

[0074] Optionally, referring to Figure 3 , yet another embodiment of the present utility model provides an industrial heating device. Based on the above Figure 2 illustrated embodiment, the thick film heating device 210 includes a heating pipe 211, wherein:

[0075] A thick film layer 212 is provided on the pipe wall of the heating pipe 211. The heating pipe 211 is respectively communicated with the water storage tank 100 through a connecting pipeline; the thick film layer 212 is used for heating the water flowing through the heating pipe 211 when powered on.

[0076] In this embodiment, the heating pipe 211, as the core component of the thick film heating device 210, directly embeds the thick film layer 212 into the pipe wall, achieving an efficient and uniform heating effect. This design of directly embedding the thick film layer 212 into the pipe wall not only greatly improves the thermal energy conversion efficiency, but also ensures that the water flow can be heated in all directions without dead angles during the heating process, thus effectively avoiding the problem of uneven temperature that may occur in traditional heating methods. In addition, the heating pipe 211 is made of high-quality materials and has excellent corrosion resistance and high-temperature resistance, and can operate stably for a long time in a harsh working environment, greatly extending the service life of the device.

[0077] In this embodiment, the thick film layer 212 is provided on the inner wall of the heating tube 211, or the thick film layer 212 is provided on the outer wall of the heating tube 211, or the thick film layer 212 is provided between the wall layers of the heating tube 211.

[0078] In this embodiment, when the thick film layer 212 is ingeniously arranged at different positions of the heating tube 211, its heating effect and efficiency can both exhibit unique advantages. If the thick film layer 212 is placed on the inner wall of the heating tube 211, the water flow can directly contact the heat source when passing through the pipeline, realizing instant heat transfer, thereby improving the instantaneity and efficiency of heating. It should be noted that in order to achieve better heating effect while realizing the separation of water and electricity, when the thick film layer 212 is placed on the inner wall of the heating tube 211, the outer surface of the thick film layer 212 needs to be protected by an insulating layer to ensure that the water flow is completely isolated from the electric heating element, so as to eliminate any potential electric leakage risk. The insulating layer can be made of materials with high temperature resistance and corrosion resistance, such as ceramics, Teflon, etc., to further ensure the safety and stability of the heating process. The design of placing the thick film layer 212 on the inner wall of the heating tube 211 is particularly suitable for scenarios with high requirements for heating speed, such as the water use requirements on a rapid heating production line.

[0079] If the thick film layer 212 is arranged on the outer wall of the heating tube 211, although the heat transfer needs to pass through the pipe wall material, such a design can effectively protect the heating element from direct erosion by the water flow, increasing the durability and safety of the equipment. At the same time, the outer wall heating method can also achieve a more uniform heating effect through the heat conduction characteristics of the pipe wall material, reducing the phenomena of local overheating or uneven temperature.

[0080] If the thick film layer 212 is embedded between the wall layers of the heating tube 211, an efficient sandwich heating structure is formed. This structure not only makes full use of the thickness of the pipe wall, increasing the heat exchange area, but also enables better heat storage and transfer within the pipe wall, thereby improving the overall thermal energy utilization efficiency. In addition, the sandwich heating design can effectively reduce heat dissipation, improve the heat preservation performance, and further reduce energy consumption.

[0081] Optionally, referring to Figure 4 , another embodiment of the present utility model provides an industrial heating device. Based on the above Figure 3 shown embodiment, a spiral channel 2111 is formed in the heating tube 211. The spiral channel 2111 spirally extends from the water inlet end to the water outlet end of the heating tube 211. The spiral channel 2111 is used to make the water flow spirally in the heating tube 211, so as to make the heating more sufficient.

[0082] In this embodiment, the design of the spiral channel 2111 in the heating tube 211 not only enhances the turbulent effect of the water flow but also significantly improves the heat exchange efficiency. When the water flow enters the heating tube 211 from the water inlet end and slowly advances along the spiral channel 2111, the extension of its path and the frequent changes in direction make the contact between the water flow and the inner wall of the heating tube 211 more frequent and sufficient. This dynamic flow not only avoids the dead water areas that may occur in traditional straight channels but also ensures that every part of the water flow is evenly heated, thus effectively improving the uniformity and consistency of heating.

[0083] In addition, the design of the spiral channel 2111 can also utilize the kinetic energy of the water flow and convert it into part of the heat energy. As the water flow continuously rotates and advances, its internal kinetic energy is gradually consumed and converted into heat energy. This conversion process further improves the heating efficiency and reduces energy waste. At the same time, the spiral channel 2111 can also have a certain self-cleaning function. Through the scouring action of the water flow, it can effectively prevent the inner wall of the heating tube 211 from scaling, extend the service life of the equipment, and reduce the maintenance cost.

[0084] To improve the heating effect and safety, the spiral channel 2111 in this embodiment can also be made of special materials, such as stainless steel or titanium alloy with excellent thermal conductivity and corrosion resistance. These materials can not only transfer heat quickly but also effectively resist the erosion and corrosion of the water flow, ensuring the stability and reliability of the heating tube 211 during long-term use.

[0085] On the other hand, to better adapt to the heating requirements under different working conditions, the spiral channel 2111 in this embodiment can also be adjusted and optimized according to actual needs. For example, by changing parameters such as the diameter, pitch, and roughness of the channel wall of the spiral channel 2111, precise control of the water flow speed, heating time, and heating temperature can be achieved, so as to meet the heating requirements in different scenarios.

[0086] Optionally, referring to Figure 5 , another embodiment of the present utility model provides an industrial heating device. Based on the above Figure 4 shown embodiment, a stud 2112 is arranged in the heating tube 211. The stud 2112 extends from the water inlet end to the water outlet end of the heating tube 211, so as to form a spiral channel 2111 in the heating tube 211.

[0087] In this embodiment, the studs 2112 are evenly distributed along the axial direction of the heating tube 211 and gradually rotate along the water flow direction, thereby constructing a continuous and stable spiral channel 2111 inside the heating tube 211. This design not only simplifies the structure of the heating tube 211 but also significantly improves the heating efficiency and uniformity.

[0088] Among them, parameters such as the rotation angle, spacing, and diameter of the stud 2112 can be precisely adjusted according to actual requirements. By optimizing these parameters, fine control of the water flow rate, turbulence degree, and heating time can be achieved, ensuring that the water always maintains the best heating state during the heating process. In addition, the material of the stud 2112 is usually selected as a high-temperature resistant and corrosion-resistant material that matches the heating pipe 211 to ensure its long-term stability and reliability in harsh working environments.

[0089] Among them, the stud 2112 can be formed by processing the heating pipe 211 using hardware CNC or integrally formed by plastic injection molding, and a spiral channel 2111 for guiding the water flow direction is formed between the stud 2112 and the inner wall of the heating pipe 211.

[0090] During the heating process, after the water flow enters the heating pipe 211 from the water inlet end, it is guided by the stud 2112 into the spiral channel 2111. As the water flow continuously advances, the rotating design of the stud 2112 causes the water flow direction to change frequently, generating a strong turbulence effect. This turbulence not only increases the contact area between the water flow and the inner wall of the heating pipe 211 but also promotes the rapid transfer and uniform distribution of heat in the water flow. Therefore, even at a relatively high water flow rate, the heating pipe 211 can ensure that every part of the water flow is fully heated, thus achieving an efficient and uniform heating effect.

[0091] Optionally, referring to Figure 6 , another embodiment of the present utility model provides an industrial heating device. Based on the above Figures 3 to 5 shown embodiment, the number of heating pipes 211 is multiple. Each heating pipe 211 has a first end 2113 and a second end 2114. The first ends 2113 of the multiple heating pipes 211 are interconnected and configured with a first water inlet end, and the second ends 2114 of the multiple heating pipes 211 are interconnected and configured with a first water outlet end. The first water inlet end and the first water outlet end are respectively connected to the storage tank 100 through connecting pipelines.

[0092] In this embodiment, the overall heating capacity and flexibility are significantly enhanced by connecting multiple heating pipes 211 in parallel. The multiple heating pipes 211 are used to heat the liquid flowing through the heating pipe 211. The power of a single heating pipe can provide a heating power of 5 - 20 KW, and each heating pipe 211 is based on the optimized design described above, including the spiral channel 2111 and the stud 2112 structure, to ensure an efficient and uniform heating effect. This modular design not only facilitates the maintenance and replacement of the device but also allows users to flexibly adjust the scale of the heating system according to actual requirements.

[0093] When multiple heating tubes 211 are connected in parallel, they jointly share the heating task, thereby improving the heating rate and efficiency of the entire system. Through reasonable layout and connection, the first water inlet end evenly distributes the water flow to be heated into each heating tube 211, and each heating tube 211 works independently to heat the water flow to the set temperature. Subsequently, the heated water flow converges at the first water outlet end through their respective second ends 2114 and finally returns to the water storage tank 100 or is supplied to water-using equipment through the connecting pipeline for use.

[0094] In this embodiment, the first ends 2113 of multiple heating tubes 211 are interconnected through a first return pipe 213, and the first return pipe 213 is configured with a first water inlet end, and / or, the second ends 2114 of multiple heating tubes 211 are interconnected through a second return pipe 214, and the second return pipe 214 is configured with a first water outlet end.

[0095] In this embodiment, by introducing the design of the first return pipe 213 and the second return pipe 214, the industrial heating equipment is made more compact and efficient in structure. The first return pipe 213 serves as a unified water flow distribution channel, ensuring that the cold water introduced from the water storage tank 100 can be evenly and stably distributed to each heating tube 211, avoiding heating efficiency differences caused by uneven water flow distribution. This design not only simplifies the pipeline layout but also reduces the energy consumption losses that may be brought about by uneven water flow distribution.

[0096] On the other hand, the second return pipe 214 acts as a collector for the heated water flow. When each heating tube 211 completes the heating task, the heated water flow converges into the second return pipe 214 through their respective second ends 2114 and finally converges at the first water outlet end on the second return pipe 214. In this process, the second return pipe 214 not only realizes the convergence of the water flow but also promotes the mixing and temperature equilibrium of the water flow through the design of its internal flow channel, ensuring that the water flow flowing out from the first water outlet end has the same temperature and meets the subsequent use requirements. In addition, the second return pipe 214 can also serve as a thermal buffer zone inside the system, storing a certain amount of hot water to cope with the short-term fluctuations in hot water demand and improving the stability and response speed of the system.

[0097] Optionally, referring to Figure 7 , another embodiment of the present utility model provides an industrial heating equipment. Based on the above Figure 1 shown embodiment, water outlet 110 and water return port 120 are arranged vertically and horizontally on one side of the water storage tank 100. The water outlet 110 is used to connect to the water inlet end of the water-using equipment, and the water return port 120 is used to connect to the water outlet end of the water-using equipment.

[0098] In this embodiment, the water storage tank 100 realizes seamless docking and efficient circulation with the water-using equipment by setting a water outlet 110 and a water return port 120. Among them, the water outlet 110 is located at the lower part of the water storage tank 100, and its design aims to ensure that the water flowing out of the water storage tank 100 is hot water with a relatively high temperature and sufficient heating, so as to directly meet the demand of the water-using equipment for high-temperature water. This layout not only reduces the heat loss during the transmission process but also improves the utilization efficiency of hot water. On the other hand, the water return port 120 is cleverly set at the upper part of the water storage tank 100 to receive the return water from the water outlet end of the water-using equipment. These return waters may enter the water storage tank 100 again through the water return port 120 due to the temperature drop during use and can be heated again through the heating pipe 211. Such a circulation mechanism not only ensures that the water-using equipment can always obtain a stable and high-quality hot water supply but also realizes the recycling of water resources, reducing energy consumption and costs.

[0099] Optionally, referring to Figure 8 , another embodiment of the present utility model provides an industrial heating device. Based on the above Figure 1 shown embodiment, the water storage tank 100 is provided with an overflow port 130 at the upper part, and the overflow port 130 is used to discharge water outside the water storage tank 100 when the water level in the water storage tank 100 is too high.

[0100] In this embodiment, an overflow port 130 is added to the top of the water storage tank 100 to solve the potential safety hazards caused by abnormal water level rise. During the heating and water supply process, if the water level in the water storage tank 100 rises rapidly due to excessive input of external water source or internal failure, once it exceeds the preset safety water level line, the excess water will be automatically discharged outside the water storage tank 100 through the overflow port 130, effectively avoiding the risk of water tank overflow or even rupture.

[0101] Optionally, referring to Figure 9 , still another embodiment of the present utility model provides an industrial heating device. Based on the above Figure 1 shown embodiment, the water storage tank 100 is provided with a maintenance port 140 and a sealing cover 150 at the top. The maintenance port 140 is used for users to enter the water storage tank 100 for maintenance, and the sealing cover 150 is used to close the maintenance port 140 to ensure the sealing performance and heat preservation effect of the water storage tank 100 when there is no maintenance.

[0102] In this embodiment, the added maintenance port 140 at the top not only provides a direct access for users to enter the interior of the water storage tank 100 for maintenance but also facilitates cleaning, replacement, or debugging of core components such as the heating pipe 211 and connecting pipelines when necessary. The design position of the maintenance port 140 is carefully considered to ensure that it will not affect the overall structural stability of the water storage tank 100 when opened, and at the same time, it can minimize the impact on the normal operation of the equipment due to maintenance work.

[0103] The inspection opening 140 can be equipped with a high-quality sealing cover 150, which can be made of materials resistant to high temperatures and corrosion, ensuring that the inspection opening 140 can be tightly closed when there is no need for inspection, effectively preventing external air, dust, and impurities from entering the inside of the water storage tank 100, thereby maintaining the water quality clean, and at the same time ensuring the sealing and heat preservation effects of the water storage tank 100. The sealing cover 150 can be designed with a convenient opening and closing mechanism, which can be easily operated by users, and the inspection opening 140 can be quickly opened and closed without special tools, improving work efficiency.

[0104] Optionally, referring to Figure 10 , another embodiment of the present invention provides an industrial heating device. Based on the above Figure 1 shown embodiment, a drain outlet 160 for discharging the water in the water storage tank 100 is provided at the bottom of the water storage tank 100, and a drain conduit 161 is connected through the drain outlet 160.

[0105] In this embodiment, the added drain outlet 160 at the bottom of the water storage tank 100 and its connected drain conduit 161 provide great convenience for the maintenance and cleaning of the device. When it is necessary to thoroughly clean the inside of the water storage tank 100 or remove sediments, only need to open the valve on the drain outlet 160, and the water in the water storage tank 100 can be quickly discharged through the drain conduit 161, greatly shortening the cleaning time and improving work efficiency. In addition, the design of the drain conduit 161 also considers the smoothness and stability of the drainage process, avoiding problems such as blockage or leakage caused by poor water flow.

[0106] To further optimize the operability and safety of the device, the drain outlet 160 and its valve can be designed to be easily accessible and have a simple operation structure, such as being set in a manually reachable position or equipped with an electric actuator to achieve remote control. At the same time, the drain conduit 161 can be made of materials resistant to corrosion and high temperatures to ensure its stable performance during long-term use and extend the service life of the device.

[0107] In addition, to meet the requirements under different working conditions, the present invention also provides a variety of configuration schemes for the drain outlet 160 and the drain conduit 161. For example, according to the capacity and shape of the water storage tank 100, drain conduits 161 with different diameters and lengths can be designed to adapt to different drainage speed and drainage volume requirements.

[0108] Optionally, referring to Figure 11 and Figure 12 , yet another embodiment of the present invention provides an industrial heating device. Based on the above Figure 1 shown embodiment, the industrial heating device further includes a detection circuit 300 and a control circuit 400, wherein:

[0109] The detection circuit 300 includes a temperature sensor 310 disposed within the water storage tank 100. The detection circuit 300 is used to detect the water temperature in the water storage tank 100 and output a corresponding water temperature signal. The first input terminal of the control circuit 400 is connected to the first output terminal of the detection circuit 300. The control circuit 400 is used to control the heating temperature of the thick film heating device 210 according to the water temperature signal.

[0110] In this embodiment, the detection circuit 300 can be an electronic system integrating high-precision temperature sensors 310. These sensors are cleverly arranged at different positions within the water storage tank 100 to ensure comprehensive and accurate monitoring of water temperature changes. These sensors not only have fast response capabilities but also can maintain stable performance in harsh environments such as high temperature and high humidity, providing reliable data support for the control system.

[0111] The control circuit 400, on the other hand, serves as the brain of the entire heating device. It receives the water temperature signal from the detection circuit 300 and performs real-time analysis and processing on these signals through built-in algorithms. According to the preset heating logic and the current water temperature condition, the control circuit 400 can automatically adjust the heating power of the thick film heating device 210, thereby achieving precise control of the water temperature. This closed-loop control mechanism not only ensures that the heating device can quickly respond to water temperature changes but also can maintain the stability and uniformity of the water temperature under different working conditions, meeting various complex usage requirements.

[0112] It can be understood that the control circuit 400 can be implemented using a main controller, such as an MCU (Microcontroller Unit), a DSP (Digital Signal Process), an FPGA (Field Programmable Gate Array), an SOC (System On Chip), etc.

[0113] In this embodiment, the thick film heating system 200 includes: a thick film heating device 210 and a water pump 220, where:

[0114] The thick-film heating device 210 includes a plurality of heating tubes 211. A thick-film layer 212 is provided on the tube wall of each heating tube 211. Each heating tube 211 has a first end 2113 and a second end 2114. The first ends 2113 of the plurality of heating tubes 211 communicate with each other and are configured as a first water inlet end. The second ends 2114 of the plurality of heating tubes 211 communicate with each other and are configured as a first water outlet end. The first water inlet end and the first water outlet end are respectively communicated with the water storage tank 100 through a connecting pipeline. The thick-film layer 212 is used to heat the water flowing through the heating tube 211 when electrified. A water pump 220 is arranged on the connecting pipeline and is used to drive the water in the water storage tank 100 to be heated by the thick-film heating device 210 and then re-transported to the water storage tank 100. Temperature sensors 310 are respectively arranged at the first water inlet end and the first water outlet end. The control circuit 400 is used to control the heating temperature of the thick-film heating device 210 according to the water temperature signals detected by the temperature sensors 310 at the first water inlet end and the first water outlet end.

[0115] In this embodiment, for the control of the thick-film heating device 210, the core lies in how to accurately adjust the heating power through the control circuit 400 according to the water temperature signals fed back by the temperature sensors 310, so as to realize the closed-loop control of the water temperature. Among them, the temperature sensor 310 is arranged at the water inlet position where the water storage tank 100 communicates with the first water outlet end to detect the temperature of the first water outlet end. At the same time, a temperature sensor 310 can also be arranged in front of the first water inlet end to detect the water temperature flowing into the heating tube 211. After the obtained water temperature signals are transmitted to the control circuit 400 for processing, the control circuit 400 uses the built-in algorithm to analyze and compare these signals. The built-in algorithm will combine the gap between the current water temperature and the target water temperature (preset or user-set) to automatically determine the speed and direction of the water temperature change. Then, the thick-film heating device 210 is adjusted. If it is detected that the water temperature flowing to the first water inlet end is relatively high and the water temperature of the first water outlet end has reached or is close to the target value, the control circuit 400 will correspondingly reduce the heating power of the thick-film heating device 210 or even temporarily turn off the heating function to avoid too high water temperature. On the contrary, if it is detected that the water temperature flowing into the heating tube 211 is relatively low and the water temperature of the first water outlet end is far from the target value, the control circuit 400 will increase the heating power to accelerate the rising speed of the water temperature.

[0116] In addition, in order to better improve the heating efficiency and energy utilization rate, the water pump 220 is designed to be able to adjust the flow rate according to actual needs. For example, in the initial heating stage, when the gap between the water temperature and the target value is large, the water pump 220 can increase the flow rate to enable more cold water to quickly pass through the heating tube 211 for heating. When approaching the target temperature, the water pump 220 can appropriately reduce the flow rate to reduce energy loss and achieve more refined temperature control.

[0117] In this embodiment, as Figure 15As shown, a temperature sensor 310 is provided on each heating tube 211, and the control circuit 400 is configured to control the heating tube to turn off when the heating tube temperature signal exceeds the temperature protection threshold.

[0118] In this embodiment, in order to avoid dry burning or abnormal temperature rise during the heating process of the heating tube 211, thereby improving the efficiency and stability of the entire thick film heating system 200, the temperature sensors 310 on each heating tube 211 are independently connected to the control circuit 400 to ensure that the working state of each heating tube 211 can be monitored in real time and accurately. These temperature sensors 310 generally have the characteristics of high sensitivity and fast response, and can capture the temperature changes on the surface of the heating tube 211 in a very short time and convert these changes into electrical signals and transmit them to the control circuit 400.

[0119] Next, after receiving the temperature signals from each heating tube 211, the control circuit 400 will immediately start the built-in algorithm to process these signals. The algorithm will comprehensively calculate the required temperature data for each heating tube 211 based on the preset heating curve, the actual temperature of the current heating tube 211, the target temperature, and the temperature threshold, and compare and analyze it with the current temperature signal in real time. Once it is found that the temperature signal of a certain heating tube 211 exceeds the preset temperature protection threshold, the control circuit 400 will respond quickly and take corresponding safety measures. This process fully considers the heat conduction effect between the heating tubes 211, the water flow rate, and the influence of the external environment on the heating effect, ensuring the accuracy and rationality of the calculation. Then, the control circuit 400 will adjust the current or voltage supplied to each heating tube 211 according to the calculation result to achieve precise adjustment of the heating power. For the heating tube 211 with a relatively low temperature, the control circuit 400 will increase its heating power to make it heat up quickly; while for the heating tube 211 whose temperature has approached or reached the target value, the power supply will be reduced or stopped to avoid overheating.

[0120] In this embodiment, as Figure 15 shown, a temperature control switch 330 is provided on each heating tube. The temperature control switch 330 is serially arranged between the power supply and the power input end of the heating tube 211. The temperature control switch 330 is configured to disconnect the path between the heating tube 211 and the power supply when the heating tube temperature signal exceeds the temperature protection threshold, so as to turn off the heating tube 211.

[0121] In this embodiment, by providing a temperature control switch 330 on each heating tube 211, when the temperature exceeds the temperature protection threshold, for example, the temperature protection threshold is 60 °C, when the temperature exceeds 60 °C, the temperature control switch 330 will immediately respond and automatically cut off the power supply to the corresponding heating tube 211. The design of the temperature control switch 330 can not only effectively prevent potential safety hazards caused by overheating of the heating tube, such as melting, cracking, or even fire, but also protect the heating element from damage under long-term high-temperature operation, extend the service life of the entire system, and prevent problems such as dry burning, local overheating, or uneven heating of the heating tube 211.

[0122] It should be noted that the temperature control switch 330 is mounted on the surface of the heating tube 211. It is a mechanical switch. When the thermosensitive metal mechanism inside the temperature control switch 330 detects that the temperature limit is reached, the thermosensitive metal mechanism can automatically disconnect, so that the circuit between the power supply and the heating tube 211 is disconnected, and automatic power-off protection can be achieved without the participation of the control circuit 400. This mechanical protection measure complements the intelligent adjustment of the control circuit 400 to jointly build multiple safety defenses to ensure the safety and reliability of the heating process.

[0123] In addition, each heating tube 211 can be independently monitored and adjusted. Once an abnormal situation occurs in a certain heating tube 211, such as dry burning (i.e., continuous heating without water flow in the heating tube 211) or local overheating, the control circuit 400 will immediately identify and respond. For example, by reducing the heating power of the heating tube 211 or completely cutting off its power supply, to prevent damage to the heating tube 211 or potential safety hazards.

[0124] In this embodiment, the thick film heating system 200 includes a thick film heating device 210 and a water pump 220, where:

[0125] The thick film heating device 210 includes a plurality of heating tubes 211. A thick film layer 212 is provided on the tube wall of each heating tube 211. Each heating tube 211 has a first end 2113 and a second end 2114. The first ends 2113 of the plurality of heating tubes 211 are interconnected and configured to form a first water inlet end. The second ends 2114 of the plurality of heating tubes 211 are interconnected and configured to form a first water outlet end. The first water inlet end and the first water outlet end are respectively connected to the storage tank 100 through connecting pipelines; the thick film layer 212 is used to heat the water flowing through the heating tube 211 when powered on;

[0126] The water pump 220 is arranged on the connecting pipeline and is used to drive the water in the storage tank 100 to be heated by the thick film heating device 210 and then re-transported to the storage tank 100;

[0127] On one side of the water storage tank 100, a water outlet 110 and a water return port 120 are arranged vertically. The water outlet 110 is used to connect to the water inlet end of the water-using device, and the water return port 120 is used to connect to the water outlet end of the water-using device;

[0128] Temperature sensors 310 are respectively arranged at the water outlet 110 and the water return port 120;

[0129] The control circuit 400 is used to control the heating temperature of the thick film heating device 210 according to the second water temperature signals of the water outlet 110 and the water return port 120 detected by the temperature sensors 310.

[0130] In this embodiment, in order to ensure that the water temperature supplied to the water-using device always remains within the ideal range, by respectively arranging temperature sensors 310 at the water outlet 110 and the water return port 120 of the water storage tank 100, the water temperature supplied to the water-using device and the water return temperature can be obtained in real time. These two parameters are crucial for accurately adjusting the heating temperature. After receiving the second water temperature signals of the water outlet 110 and the water return port 120, the control circuit 400 will first perform data comparison and analysis. It will compare whether the water temperature of the water outlet 110 meets the preset water temperature requirement for use. If the water temperature is too low, it means that the heating power needs to be increased to raise the water outlet temperature; on the contrary, if the water temperature is too high, the heating power needs to be reduced to prevent the risk of scalding. At the same time, the water temperature of the water return port 120 also provides important feedback information, which reflects the water temperature situation after the water-using device is used and helps the control circuit 400 to judge whether there is a problem of overheating or insufficient heating of the heating tube 211.

[0131] In addition, in order to meet the different water temperature requirements of different water-using devices, a programmable temperature setting function can also be designed for the control circuit 400. The user can easily set the target water temperature of the water outlet 110 through the control panel according to actual needs. Once the setting is completed, the control circuit 400 will automatically adjust the heating strategy according to the new target temperature to ensure that the water-using device can always obtain the most suitable water temperature.

[0132] Optionally, referring to Figure 13 and Figure 14 , another embodiment of the present utility model provides an industrial heating device. Based on the above Figure 11 and Figure 12 shown embodiments, the detection circuit 300 includes a liquid level sensor 320. The liquid level sensor 320 is arranged in the water storage tank 100. The liquid level sensor 320 is used to detect the water level in the water storage tank 100 and output a corresponding liquid level signal to the control circuit 400;

[0133] A water replenishing device 170 is arranged at the top of the water storage tank 100. The water replenishing device 170 includes a solenoid valve 171. The water outlet end of the solenoid valve 171 is connected to the top of the water tank;

[0134] The control circuit 400 is used to control the solenoid valve 171 to open when the liquid level signal is at the low water level threshold, so as to replenish water to the water storage tank 100.

[0135] In this embodiment, a liquid level sensor 320 is provided to detect the liquid level in the water storage tank 100, so as to ensure that the water level in the water storage tank 100 is always maintained within a safe and efficient operating range, avoiding the risk of dry burning of the heating tube 211 caused by too low water level, or energy waste and safety hazards caused by too high water level.

[0136] Among them, the liquid level sensor 320 is arranged inside the water storage tank 100. By using advanced detection technology, it monitors the change of the water level in the water tank in real time and accurately transmits these changes to the control circuit 400 in the form of a liquid level signal. Among them, when the low water level appears, a low water level threshold signal will be output. When the control circuit 400 receives the low water level threshold signal from the liquid level sensor 320, it issues an instruction to open the solenoid valve 171. As the solenoid valve 171 is opened, the external water source begins to inject clean water through the top of the water storage tank 100 until the water level returns to the preset safe range.

[0137] It should be noted that the water replenishment process is not unlimited. The control circuit 400 will continuously monitor the output signal of the liquid level sensor 320. Once the water level reaches or exceeds the set high water level threshold, it will immediately issue a closing instruction to quickly close the solenoid valve 171, thereby preventing the water level from being too high.

[0138] It should be noted that in this article, the terms "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or system. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or system including that element.

[0139] The serial numbers of the above embodiments of the present utility model are only for description and do not represent the advantages and disadvantages of the embodiments.

[0140] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described example methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present utility model, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. This computer software product is stored in a storage medium as described above (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions for causing a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in various embodiments of the present utility model.

[0141] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. An industrial heating device, characterized in that: The industrial heating equipment comprises: Water storage tanks; A thick film heating system, wherein the thick film heating system has a water inlet and a water outlet, and both the water inlet and the water outlet of the thick film heating system are connected to the water storage tank; The thick film heating system is used to extract water from the water storage tank, heat it, and then transport it back to the water storage tank to heat the water in the water storage tank.

2. The industrial heating device according to claim 1, characterized in that: The thick film heating system comprises: A thick film heating device, wherein the thick film heating device has a water inlet and a water outlet, and the water inlet and the water outlet of the thick film heating device are respectively connected to the water storage tank through connecting pipes; A water pump is arranged on the connecting pipeline, and is used to drive the water in the water storage tank to be heated by the thick film heating device and then transported back to the water storage tank.

3. The industrial heating device according to claim 2, characterized in that: The thick film heating device comprises a heating tube, a thick film layer is arranged on the tube wall of the heating tube, and the heating tube is connected with the water storage tank through the connecting pipeline respectively; The thick film layer is used to heat the water flowing through the heating tube when power is supplied; The thick film layer is arranged on the inner wall of the heating tube, or the thick film layer is arranged on the outer wall of the heating tube, or the thick film layer is arranged between the tube wall interlayers of the heating tube.

4. The industrial heating device according to claim 3, characterized in that: A spiral channel is formed in the heating tube, and the spiral channel is spirally extended from the water inlet end to the water outlet end of the heating tube; A stud is arranged in the heating tube, and the stud is extended from the water inlet end to the water outlet end of the heating tube, so that the spiral channel is formed in the heating tube.

5. The industrial heating device according to any one of claims 3 to 4, characterized in that: There are multiple heating tubes, each of which has a first end and a second end. The first ends of the multiple heating tubes are interconnected and have a first water inlet end, and the second ends of the multiple heating tubes are interconnected and have a first water outlet end. The first water inlet end and the first water outlet end are respectively connected to the water storage tank through the connecting pipeline. The first ends of the plurality of heating tubes are interconnected through a first return tube having the first water inlet end, and / or the second ends of the plurality of heating tubes are interconnected through a second return tube having the first water outlet end.

6. The industrial heating device according to claim 1, characterized in that: A water outlet and a water return port are provided on one side of the water storage tank, the water outlet is used to connect to the water inlet of the water-using equipment, and the water return port is used to connect to the water outlet of the water-using equipment; and / or, The water storage tank is provided with an overflow port at the upper part, and the overflow port is used to discharge water out of the water storage tank when the water level in the water storage tank is too high; and / or, The water tank is provided with an inspection port and a sealing cover at the top, wherein the inspection port is used for a user to enter the water tank for inspection; and / or, A drainage outlet for discharging water from the water tank is provided at the bottom of the water tank, and a drainage conduit is connected through the drainage outlet.

7. The industrial heating device according to claim 1, characterized in that: The industrial heating equipment also includes: A detection circuit, the detection circuit comprising a temperature sensor, the temperature sensor being disposed in the water storage tank, the detection circuit being used to detect the water temperature in the water storage tank and output a corresponding water temperature signal; A control circuit, wherein a first input end of the control circuit is connected to a first output end of the detection circuit, and the control circuit is used to control the heating temperature of the thick film heating device according to the water temperature signal.

8. The industrial heating device according to claim 7, characterized in that The detection circuit comprises a liquid level sensor, which is arranged in the water tank and is used to detect the water level in the water tank and output a corresponding liquid level signal to the control circuit; A water replenishing device is provided on the top of the water storage tank, and the water replenishing device includes a solenoid valve, and a water outlet end of the solenoid valve is connected to the top of the water tank; The control circuit is used to control the solenoid valve to open when the liquid level signal is a low water level threshold, so as to replenish water to the water storage tank.

9. The industrial heating device according to claim 7, characterized in that: The thick film heating system comprises: A thick film heating device, the thick film heating device comprising a plurality of heating tubes, each of which is provided with a thick film layer on its tube wall, each of which has a first end and a second end, the first ends of the plurality of heating tubes are interconnected and are provided with a first water inlet end, the second ends of the plurality of heating tubes are interconnected and are provided with a first water outlet end, the first water inlet end and the first water outlet end are respectively connected to the water storage tank via a connecting pipeline; the thick film layer is used to heat the water flowing through the heating tube when power is turned on; A water pump, arranged on the connecting pipeline, for driving the water in the water storage tank to be heated by the thick film heating device and then transported back to the water storage tank; The first water inlet and the first water outlet are respectively provided with the temperature sensors, and the control circuit is used to control the heating temperature of the thick film heating device according to the water temperature signals of the first water inlet and the first water outlet detected by the temperature sensors.

10. The industrial heating device according to claim 9, characterized in that The temperature sensor is provided on each of the heating tubes, and the control circuit is used to control the heating tube to shut down when the temperature signal of the heating tube exceeds the temperature protection threshold; and / or, A temperature control switch is provided on each of the heating tubes, and the temperature control switch is arranged in series between a power supply and a power input end of the heating tube. The temperature control switch is used to disconnect the path between the heating tube and the power supply when the temperature signal of the heating tube exceeds a temperature protection threshold, so as to shut down the heating tube.

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