Zero-carbon integral heat supply equipment

Abstract

The invention relates to zero-carbon integral type heat supply equipment. The zero-carbon integral type heat supply equipment comprises a power source, a heat exchanger and a controller, the heater comprises an electric heating unit and a protective sleeve, the electric heating unit is connected with the power supply, the electric heating unit is arranged in the protective sleeve, and the electric heating unit is used for heating air in the protective sleeve; the circulating fan is connected with the power supply, the circulating fan is communicated with the protective sleeve, and the circulating fan is used for promoting air circulation in the protective sleeve; and an air inlet of the radiant tube communicates with the air outlet of the protective sleeve, and the radiant tube is used for being heated by the high-temperature air from the protective sleeve and radiating infrared rays to the air in the target area so as to heat the air in the target area. The zero-carbon integral heat supply equipment solves the problem that in the prior art, fossil energy is combusted to supply heat to a plant, and consequently serious carbon emission is caused.

Description

Technical Field

[0001] This application relates to the field of heating technology, and in particular to a zero-carbon integrated heating device. Background Technology

[0002] Currently, the heating methods for large, open factory buildings are as follows: high-temperature flue gas is generated by burning fossil fuels such as coal and natural gas. This high-temperature flue gas is then heated through designed pipes, using convection and radiation to heat the air in the factory building. Burning fossil fuels such as coal and natural gas not only consumes a large amount of resources but also produces a large amount of carbon dioxide, resulting in serious carbon emissions. Summary of the Invention

[0003] This application provides a zero-carbon integrated heating device to solve the problem of serious carbon emissions caused by burning fossil fuels for heating factory buildings in the prior art.

[0004] In a first aspect, this application provides a zero-carbon integrated heating device, comprising: a power source; a heater, the heater comprising: an electric heating unit and a protective sleeve, the electric heating unit being connected to the power source and disposed inside the protective sleeve, the electric heating unit being used to heat the air inside the protective sleeve; a circulating fan, the circulating fan being connected to the power source and communicating with the protective sleeve, the circulating fan being used to promote air circulation inside the protective sleeve; and a radiant tube, the air inlet of the radiant tube being communicated with the air outlet of the protective sleeve, the radiant tube being used to be heated by high-temperature air from the protective sleeve and to radiate infrared rays to the air in the target area to heat the air in the target area.

[0005] Optionally, the zero-carbon integrated heating equipment includes: a first temperature acquisition module, which is disposed within the target area; a thyristor power regulator, the input of which is connected to the power supply, and the output of which is connected to the electric heating unit; a frequency converter, the input of which is connected to the power supply, and the output of which is connected to the control terminal of the circulating fan; and a control module, which is used to adjust the output power of the thyristor power regulator and the operating frequency of the frequency converter, at least based on a first target temperature difference, to increase the temperature of the target area, wherein the first target temperature difference is the difference between a first detected temperature and a first predetermined temperature, and the first detected temperature is the temperature acquired by the first temperature acquisition module.

[0006] Optionally, the zero-carbon integrated heating equipment further includes: a second temperature acquisition module disposed on the inner wall of the protective sleeve; the control module is used to adjust the output power of the thyristor power regulator to zero and the operating frequency of the frequency converter to the maximum operating frequency when the second detected temperature does not meet the first predetermined condition, so as to reduce the temperature of the electric heating unit; when the second detected temperature meets the first predetermined condition, the control module adjusts the output power of the thyristor power regulator and the operating frequency of the frequency converter at least based on the first target temperature difference; the second detected temperature is the temperature acquired by the second temperature acquisition module; the first predetermined condition is that the second detected temperature is not greater than a safe temperature threshold, and the safe temperature threshold is the maximum temperature allowed for safe operation of the electric heating unit.

[0007] Optionally, the zero-carbon integrated heating equipment further includes: a third temperature acquisition module, which is disposed at the air outlet of the protective sleeve; the control module is used to control the output power of the thyristor power regulator to remain constant and the operating frequency of the frequency converter to remain constant when the second detected temperature meets the first predetermined condition and the third detected temperature does not meet the second predetermined condition; when the second detected temperature does not meet the first predetermined condition and the third detected temperature does not meet the second predetermined condition, adjust the output power of the thyristor power regulator to zero and adjust the operating frequency of the frequency converter to the maximum operating frequency; when the second detected temperature does not meet the first predetermined condition and the third detected temperature meets the second predetermined condition, adjust the output power of the thyristor power regulator to zero and adjust the operating frequency of the frequency converter to the maximum operating frequency; when the second detected temperature meets the first predetermined condition and the third detected temperature meets the second predetermined condition, adjust the output power of the thyristor power regulator and the operating frequency of the frequency converter at least based on the first target temperature difference; the third detected temperature is the temperature acquired by the third temperature acquisition module, and the second predetermined condition is that the third detected temperature is less than the second predetermined temperature.

[0008] Optionally, the power supply is a three-phase voltage source, and the zero-carbon integrated heating equipment further includes: a detection module, the detection module having a through hole through which the three-phase power supply lines of the power supply pass, the detection module being used to collect multiple electrical parameter values, the multiple electrical parameter values ​​including at least: the line voltage of the three-phase power supply lines; a first wind pressure acquisition module, the first wind pressure acquisition module being disposed at the air outlet of the radiant tube; a second wind pressure acquisition module, the second wind pressure acquisition module being disposed at the air inlet of the radiant tube; adjusting the output power of the thyristor power regulator and the operating frequency of the frequency converter based at least on the first target temperature difference, including: determining the initial output power based on the first target temperature difference using a PID algorithm; and adjusting the output power of the thyristor power regulator and the operating frequency of the frequency converter based on at least the first target temperature difference. Based on the detected voltage and a preset lookup table, a target power adjustment amount is determined. The lookup table contains multiple preset voltages and preset power adjustment amounts. The target power adjustment amount is the preset power adjustment amount corresponding to the detected voltage in the preset lookup table. The sum of the initial output power and the target power adjustment amount is calculated to obtain the target output power. The output power of the thyristor power regulator is adjusted to the target output power. Based on the target output power and the target wind pressure difference, the operating frequency of the frequency converter is adjusted. The target wind pressure difference is the difference between a first wind pressure value and a second wind pressure value. The first wind pressure value is the wind pressure value collected by the first wind pressure acquisition module, and the second wind pressure value is the wind pressure value collected by the second wind pressure acquisition module.

[0009] Optionally, the zero-carbon integrated heating equipment further includes: a fourth temperature acquisition module, which is disposed at the air inlet of the protective sleeve; adjusting the operating frequency of the frequency converter based on the target output power and the target air pressure difference, including: adjusting the operating frequency of the frequency converter to the maximum operating frequency when the target air pressure difference does not meet a third predetermined condition, wherein the third predetermined condition is that the target air pressure difference is greater than a first predetermined air pressure difference; and adjusting the operating frequency of the frequency converter based on the target output power and a second target temperature difference when the target air pressure difference meets the third predetermined condition, wherein the second target temperature difference is the difference between the second detected temperature and the fourth detected temperature, and the fourth detected temperature is the temperature acquired by the fourth temperature acquisition module.

[0010] Optionally, adjusting the operating frequency of the frequency converter based on the target output power and the second target temperature difference includes: determining the target mass flow rate using the formula M=Q / C*△T based on the target output power and the second target temperature difference, where M is the target mass flow rate, Q is the target output power, C is the specific heat capacity of air at constant pressure, and △T is the second target temperature difference; determining the target operating frequency according to the target mass flow rate and a predetermined lookup table, wherein the predetermined lookup table contains multiple mapping relationships between mass flow rates and operating frequencies, and the target operating frequency is the operating frequency corresponding to the target mass flow rate in the predetermined lookup table; and adjusting the operating frequency of the frequency converter to the target operating frequency.

[0011] Optionally, the zero-carbon integrated heating equipment further includes: a display device; a wind speed acquisition module, wherein the wind speed acquisition module is disposed at the air outlet of the radiant tube; the control module is used to control the display device to display first operating information, the first operating information including at least: the first predetermined temperature, the first detected temperature, the second detected temperature, the third detected temperature, the first wind pressure value, the second wind pressure value, the wind speed value acquired by the wind speed acquisition module, and a power percentage, wherein the power percentage is the ratio of the output power of the thyristor to the maximum output power of the thyristor.

[0012] Optionally, the zero-carbon integrated heating equipment further includes: the control module for controlling the display device to display second operating information, the second operating information including: the plurality of electrical parameter values.

[0013] Optionally, the control module is configured to: control the display device to display a first alarm message when the wind speed value collected by the wind speed acquisition module is less than a predetermined wind speed value and the target wind pressure difference is less than a second predetermined wind pressure difference, wherein the first alarm message indicates that the circulating fan has malfunctioned; and control the display device to display a second alarm message when at least one of the electrical parameter values ​​is not within the corresponding predetermined parameter value range, wherein the second alarm message indicates at least that the power supply has malfunctioned, and one of the electrical parameter values ​​corresponds to one of the predetermined parameter value ranges.

[0014] In this embodiment, the electric heating unit heats the air inside the protective sleeve. The circulating fan is connected to the protective sleeve to promote air circulation inside the protective sleeve. After the high-temperature air from the protective sleeve flows into the radiant tube, the radiant tube is heated by the high-temperature air from the protective sleeve and radiates infrared rays to the air in the target area to heat the air in the target area, thereby achieving heating of the target area. The entire heating process does not produce carbon emissions, that is, it achieves zero-carbon emission heating of the target area, thus solving the problem of serious carbon emissions caused by burning fossil energy to heat the factory in the prior art. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0018] Figure 1 A schematic diagram of a zero-carbon integrated heating device provided in an embodiment of this application; Figure 2 A schematic diagram of another zero-carbon integrated heating device provided in an embodiment of this application; Figure 3 A schematic diagram of yet another zero-carbon integrated heating device provided in an embodiment of this application; Figure 4 A first cross-sectional view of a protective sleeve provided in an embodiment of this application; Figure 5 A second cross-sectional view of a protective sleeve provided in an embodiment of this application; Figure 6 A top view of a heater provided in an embodiment of this application; The symbols in the attached image are explained as follows: 10. Power supply; 11. Protective casing; 20. Electric heating unit; 21. Electric heating rod; 22. Fixing plate; 23. Positioning hole; 30. Protective sleeve; 31. Outer protective tube; 32. Inner protective tube; 33. First insulation layer; 34. Silencing tube; 35. Second insulation layer; 36. Silencing hole; 40. Circulating fan; 50. Radiant tube; 51. Balance tube; 60. First silencer; 61. Second silencer; 62. First temperature acquisition module; 63. Second temperature acquisition module; 64. Third temperature acquisition module; 65. First wind pressure acquisition module; 66. Second wind pressure acquisition module; 67. Fourth temperature acquisition module; 68. Wind speed acquisition module; 69. Detection module; 70. Thyristor power regulator; 80. Frequency converter; 90. Control module; 91. Display device. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0021] To address the serious carbon emissions caused by burning fossil fuels for factory heating in existing technologies, this application provides a zero-carbon integrated heating device that can achieve zero-carbon heating.

[0022] Figure 1 A zero-carbon integrated heating device is provided as an embodiment of this application. The zero-carbon integrated heating device includes: Power supply 10; The heater includes an electric heating unit 20 and a protective sleeve 30. The electric heating unit 20 is connected to the power supply 10 and is disposed inside the protective sleeve 30. The electric heating unit 20 is used to heat the air inside the protective sleeve 30. Specifically, the protective sleeve isolates the electric heating unit from the external environment to prevent electric shock accidents, while also reducing heat loss and improving heating efficiency.

[0023] Specifically, such as Figure 2 As shown, the electric heating unit 20 is composed of multiple electric heating rods 21. Each of the electric heating rods is made of a nickel-based alloy. Nickel-based alloys have the advantage of high temperature resistance. Using nickel-based alloys to make electric heating rods can ensure that the electric heating unit can operate stably for a long time at high temperatures.

[0024] A circulating fan 40 is connected to the power supply 10 and is connected to the protective sleeve 30. The circulating fan 40 is used to promote air circulation inside the protective sleeve 30. Radiation tube 50, the air inlet of the radiation tube 50 is connected to the air outlet of the protective sleeve 30, the radiation tube 50 is used to be heated by the high temperature air from the protective sleeve 30, and radiates infrared rays to the air in the target area to heat the air in the target area.

[0025] Specifically, the target area is the work area inside the factory building.

[0026] Specifically, the structure of the radiant tube is a tubular spiral structure, and the material of the radiant tube is aluminized alloy. Designing the structure of the radiant tube as a tubular spiral structure can increase the heat exchange area between the radiant tube and the air in the target area, allowing more heat to be transferred to the air in the target area and improving heating efficiency. Aluminized alloy has the advantage of high temperature resistance. Using aluminized alloy to make radiant tubes can ensure that the radiant tubes can operate stably for a long time at high temperatures.

[0027] Specifically, in order to improve heating efficiency, such as Figure 1 As shown, the air outlet of the circulating fan 40 is connected to the air inlet of the protective sleeve 30, the air inlet of the circulating fan 40 is connected to the air outlet of the radiant tube 50, the air outlet of the circulating fan is connected to the air inlet of the protective sleeve, and the air inlet of the circulating fan is connected to the air outlet of the radiant tube, forming a closed-loop flow path of high-temperature air of "circulating fan → protective sleeve → radiant tube → circulating fan", which avoids the mixing of external cold air and improves heating efficiency.

[0028] Specifically, such as Figure 1 As shown, Figure 1 As shown, the aforementioned zero-carbon integrated heating equipment also includes: The balancing pipe 51 has an air inlet that is connected to the outer wall of the high-temperature section of the radiation pipe 50, and an air outlet that is exposed to the air. The outer wall of the high-temperature section refers to the outer wall of a section of the radiation pipe 50 near the protective outer pipe. The balancing pipe connects the outer wall of the high-temperature section of the radiation pipe to the outside air. When the radiation pipe expands due to heat, the internal pressure is released through the balancing pipe, so that the internal pressure of the radiation pipe is maintained at normal pressure, preventing the radiation pipe from deforming or cracking and extending the service life of the radiation pipe.

[0029] Specifically, such as Figure 1As shown, the aforementioned zero-carbon integrated heating equipment further includes: a first silencer 60 and a second silencer 61. The air inlet of the first silencer 60 is connected to the air outlet of the protective sleeve 30, and the air outlet of the first silencer 60 is connected to the air inlet of the radiant tube 50. The air inlet of the second silencer 61 is connected to the air outlet of the radiant tube 50, and the air outlet of the second silencer 61 is connected to the air inlet of the circulating fan 40. Both the first silencer and the second silencer adopt silencers in the prior art. Therefore, the structure of the first silencer and the second silencer will not be described in detail. The first silencer is installed at the air inlet of the radiant tube to reduce the aerodynamic noise at the air inlet of the radiant tube, and the second silencer is installed at the air outlet of the radiant tube to reduce the aerodynamic noise at the air outlet of the radiant tube, thereby reducing the operating noise of the zero-carbon integrated heating equipment.

[0030] Through the above embodiments, the electric heating unit heats the air inside the protective sleeve, and the circulating fan is connected to the protective sleeve to promote air circulation inside the protective sleeve. After the high-temperature air from the protective sleeve flows into the radiant tube, the radiant tube is heated by the high-temperature air from the protective sleeve and radiates infrared rays to the air in the target area to heat the air in the target area, thereby achieving heating of the target area. The entire heating process does not produce carbon emissions, that is, it achieves zero-carbon emission heating of the target area, thereby solving the problem of serious carbon emissions caused by burning fossil energy for heating factory buildings in the existing technology.

[0031] To achieve adjustable temperature in the target area, in one optional embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, the above-mentioned zero-carbon integrated heating equipment includes: A first temperature acquisition module 62 is disposed within the target area. A thyristor power regulator 70, the input terminal of which is connected to the power supply 10, and the output terminal of which is connected to the electric heating unit 20. The frequency converter 80 has its input terminal connected to the power supply 10 and its output terminal connected to the control terminal of the circulating fan 40. Specifically, the operating frequency of the frequency converter and the operating frequency of the circulating fan are kept consistent.

[0032] The control module 90 is used to adjust the output power of the thyristor power regulator 70 and the operating frequency of the frequency converter 80 based at least on the target temperature difference, so as to increase the temperature of the target area. The first target temperature difference is the difference between the first detected temperature and the first predetermined temperature. The first detected temperature is the temperature acquired by the first temperature acquisition module 62.

[0033] Specifically, the first predetermined temperature can be set as needed, for example, 20°C in the morning and 16°C at night or on weekends.

[0034] In this embodiment, the electric heating unit heats the air inside the protective sleeve. The circulating fan is connected to the protective sleeve to promote air circulation inside the sleeve. After the high-temperature air from the protective sleeve flows into the radiant tube, the radiant tube is heated by the high-temperature air from the protective sleeve and radiates infrared rays to the air in the target area to heat the air in the target area and achieve heating of the target area. The heating capacity of the electric heating unit and the air circulation capacity of the circulating fan affect the temperature of the target area. Therefore, the heating capacity of the electric heating unit can be adjusted by adjusting the output power of the thyristor power regulator, and the air circulation capacity of the circulating fan can be adjusted by adjusting the operating frequency of the frequency converter, thereby adjusting the temperature of the target area and increasing the temperature of the target area.

[0035] To ensure the safe operation of zero-carbon integrated heating equipment, in one optional embodiment, such as Figure 1 and Figure 2 As shown, the aforementioned zero-carbon integrated heating equipment also includes: The second temperature acquisition module 63 is disposed on the inner wall of the protective sleeve 30. Specifically, a second temperature acquisition module is installed on the inner wall of the protective sleeve to directly monitor the temperature of the electric heating unit.

[0036] Specifically, such as Figure 4 and Figure 5 As shown, the protective sleeve includes: an outer protective tube 31, which is made of aluminum plate; and an inner protective tube 32, which is disposed between the outer protective tube 31 and the electric heating unit 20, and is made of stainless steel plate. The outer protective tube, made of aluminum plate, can isolate the electric heating unit from the external environment, preventing leakage of electricity from the electric heating unit to the external environment. The surface of the outer protective tube, made of aluminum plate, will naturally form a dense aluminum oxide film, isolating the electric heating unit from corrosive gases in the external environment, preventing the electric heating unit from being corroded by corrosive gases, thereby extending the service life of the electric heating unit. Stainless steel plate has the advantages of high temperature resistance and high hardness. The inner protective tube, made of stainless steel plate, can maintain structural stability in high temperature environment for a long time, providing stable rigid support for the electric heating unit, thereby effectively reducing the risk of damage to the electric heating unit caused by mechanical impact or deformation.

[0037] Specifically, such as Figure 4 and Figure 5As shown, the protective sleeve also includes a first insulation layer 33, which is filled between the outer protective tube 31 and the inner protective tube 32. The first insulation layer is filled between the outer protective tube and the inner protective tube to suppress the heat generated by the electric heating unit from being conducted to the external environment, thereby transferring more heat to the radiant tube and improving heating efficiency.

[0038] Specifically, such as Figure 4 and Figure 5 As shown, the aforementioned protective sleeve also includes: a silencing tube 34, which is disposed between the electric heating unit 20 and the inner protective tube 32. Multiple silencing holes 36 are formed on the wall of the silencing tube 34. The silencing tube 34 is made of stainless steel plate. A second insulation layer 35 is filled between the inner protective tube 32 and the silencing tube 34. Stainless steel plate has the advantages of high temperature resistance and high hardness, and can maintain structural stability in high-temperature environments for a long time. The morphology of the silencing holes in the silencing tube made of stainless steel plate can maintain structural stability in high-temperature environments for a long time, thereby ensuring long-term stability. To ensure the durability of the noise reduction performance, when aerodynamic noise around the electric heating unit propagates to the silencer pipe, the aerodynamic noise will enter these silencer holes. Under the friction and adhesion of the hole wall, the sound energy is efficiently converted into heat energy and dissipated. Aerodynamic noise is the noise generated by the rapid flow of air. Multiple silencer holes are formed on the pipe wall of the silencer pipe to absorb the aerodynamic noise around the electric heating unit, thereby reducing the operating noise of the zero-carbon integrated heating equipment. The second insulation layer is filled between the inner protective pipe and the silencer pipe, which further inhibits the heat generated by the electric heating unit from being conducted to the external environment, thereby transferring more heat to the radiant tube and improving heating efficiency.

[0039] Specifically, both the first and second insulation layers are made of nanogel. Nanogel has an extremely low thermal conductivity and can maintain high-efficiency insulation even in extremely cold environments. The fact that both the first and second insulation layers are made of nanogel can further suppress the heat generated by the electric heating unit from being conducted to the external environment, thereby transferring more heat to the radiant tube and improving heating efficiency.

[0040] The control module 90 is used to adjust the output power of the thyristor power regulator 70 to zero and adjust the operating frequency of the inverter 80 to the maximum operating frequency when the second detected temperature does not meet the first predetermined condition, so as to reduce the temperature of the electric heating unit. When the second detected temperature meets the first predetermined condition, the control module 90 adjusts the output power of the thyristor power regulator 70 and the operating frequency of the inverter 80 based at least on the first target temperature difference. The second detected temperature is the temperature collected by the second temperature acquisition module 63. The first predetermined condition is that the second detected temperature is not greater than the safe temperature threshold. The safe temperature threshold is the maximum temperature allowed for safe operation of the electric heating unit 20.

[0041] Specifically, the maximum operating frequency is the upper limit of the operating frequency of the circulating fan, and the safe temperature threshold is 350℃.

[0042] In this embodiment, if the second detected temperature is greater than the safe temperature threshold, it is determined that the temperature of the electric heating unit is greater than the safe temperature threshold. At this time, the output power of the thyristor power regulator is adjusted to zero, and the operating frequency of the frequency converter is adjusted to the maximum operating frequency. That is, the electric heating unit is immediately controlled to stop heating, and the circulating fan is controlled to provide the maximum air volume to cool the electric heating unit, so as to reduce the temperature of the electric heating unit, prevent the electric heating unit from overheating and being damaged or burned, prevent fire risk, and ensure the safe operation of the zero-carbon integrated heating equipment. If the second detected temperature is not greater than the safe temperature threshold, the ability of the electric heating unit to heat the air is adjusted by adjusting the output power of the thyristor power regulator, and the ability of the circulating fan to promote air circulation is adjusted by adjusting the operating frequency of the frequency converter, thereby adjusting the temperature of the target area and raising the temperature of the target area.

[0043] To ensure the safe operation of zero-carbon integrated heating equipment, in one optional embodiment, such as Figure 1 and Figure 2 As shown, the aforementioned zero-carbon integrated heating equipment also includes: The third temperature acquisition module 64 is installed at the air outlet of the protective sleeve 30. Specifically, the higher the temperature of the electric heating unit, the higher the temperature of the air outlet of the protective sleeve. A third temperature acquisition module is installed at the air outlet of the protective sleeve to indirectly monitor the temperature of the electric heating unit.

[0044] The control module 90 is configured to, when the second detected temperature meets the first predetermined condition and the third detected temperature does not meet the second predetermined condition, maintain the output power of the thyristor power regulator 70 at a constant level and maintain the operating frequency of the inverter 80 at a constant level; and when the second detected temperature does not meet the first predetermined condition and the third detected temperature does not meet the second predetermined condition, adjust the output power of the thyristor power regulator 70 to zero and adjust the operating frequency of the inverter 80 to the maximum operating frequency. When the three detected temperatures meet the second predetermined condition, the output power of the thyristor power regulator 70 is adjusted to zero, and the operating frequency of the inverter 80 is adjusted to the maximum operating frequency. When the second detected temperature meets the first predetermined condition and the third detected temperature meets the second predetermined condition, the output power of the thyristor power regulator 70 and the operating frequency of the inverter 80 are adjusted, at least based on the first target temperature difference. The third detected temperature is the temperature collected by the third temperature acquisition module 64, and the second predetermined condition is that the third detected temperature is less than the second predetermined temperature.

[0045] Specifically, the second predetermined temperature is 300°C.

[0046] In this embodiment, if the second detected temperature is not greater than the safe temperature threshold and the third detected temperature is not less than the second predetermined temperature, it is determined that the temperature of the electric heating unit is close to the safe temperature threshold. At this time, the output power of the thyristor power regulator is kept constant, and the operating frequency of the frequency converter is kept constant to minimize the temperature of the electric heating unit from exceeding the safe temperature threshold and ensure the safe operation of the zero-carbon integrated heating equipment. Regardless of whether the third detected temperature is not less than the second predetermined temperature, as long as the second detected temperature is greater than the safe temperature threshold, it is determined that the electric heating unit is above the safe temperature threshold. The output power of the thyristor power regulator is adjusted to zero, and the operating frequency of the frequency converter is adjusted to zero. When the frequency is adjusted to the maximum operating frequency, the electric heating unit is immediately stopped from heating. The circulating fan is controlled to provide maximum airflow to cool the electric heating unit, thereby reducing its temperature, preventing overheating damage or burnout, preventing fire risks, and ensuring the safe operation of the zero-carbon integrated heating equipment. If the second detected temperature is not greater than the safe temperature threshold and the third detected temperature is less than the second predetermined temperature, the output power of the thyristor power regulator is adjusted to regulate the heating capacity of the electric heating unit, and the operating frequency of the inverter is adjusted to regulate the air circulation capacity of the circulating fan, thereby regulating the temperature of the target area and raising the temperature of the target area.

[0047] To ensure precise temperature control in the target area, in one optional embodiment, such as Figure 1 , Figure 2 and Figure 3As shown, the power supply is a three-phase voltage source, and the aforementioned zero-carbon integrated heating equipment also includes: The detection module 69 has a through hole through which the three-phase power supply lines of the power supply 10 pass. The detection module 69 is used to collect the line voltage of the three-phase power supply lines. The first wind pressure acquisition module 65 is located at the air outlet of the radiant tube 50. The second wind pressure acquisition module 66 is installed at the air inlet of the radiant tube 50. Based at least on the aforementioned first target temperature difference, adjusting the output power of the aforementioned thyristor power regulator and the operating frequency of the aforementioned frequency converter includes: Based on the aforementioned first target temperature difference, a PID algorithm is used to determine the initial output power; Specifically, in this embodiment, the first target temperature difference is used as the input of the PID algorithm, and the output of the PID algorithm is the value of the control quantity, which is used to control the output power of the thyristor power regulator. The value range of the control quantity is 4-20mA, and one value of the control quantity corresponds to one value of the output power of the thyristor power regulator. The target output power is the value of the output power of the thyristor power regulator corresponding to the value of the control quantity output by the PID algorithm. The use of the PID algorithm to determine the value of the control quantity based on the temperature difference is existing technology, so it will not be described in detail here.

[0048] Based on the detection voltage and the preset lookup table, the target power adjustment amount is determined. The lookup table contains multiple preset voltages and preset power adjustment amounts. The target power adjustment amount is the preset power adjustment amount corresponding to the detection voltage in the preset lookup table. The target output power is obtained by summing the initial output power and the target power adjustment amount. Specifically, assuming the initial output power is 50% of the maximum output power, if the detection voltage is 380V and the target power adjustment is 0, the target output power is 50% of the maximum output power. If the detection voltage is 340V and the target power adjustment is 5% of the maximum output power, the target output power is 55% of the maximum output power. If the detection voltage is 420V and the target power adjustment is -5% of the maximum output power, the target output power is 50% of the maximum output power. By dynamically adjusting the output power of the thyristor power regulator through the detection voltage and the preset lookup table, the problem of unstable operation of the thyristor power regulator caused by power supply voltage fluctuations can be overcome.

[0049] Adjust the output power of the aforementioned thyristor power regulator to the aforementioned target output power; Based on the target output power and target wind pressure difference, the operating frequency of the inverter is adjusted. The target wind pressure difference is the difference between the first wind pressure value and the second wind pressure value. The first wind pressure value is the wind pressure value collected by the first wind pressure acquisition module, and the second wind pressure value is the wind pressure value collected by the second wind pressure acquisition module.

[0050] Specifically, based on the first target temperature difference, a PID algorithm is used to determine the initial output power. Then, based on the initial output power, the detected voltage, and a preset lookup table, the target output power is determined. The output power of the thyristor power regulator is adjusted to the target output power. Increasing the output power of the thyristor power regulator increases the heating capacity of the electric heating unit. However, if the operating frequency of the circulating fan does not increase synchronously (i.e., the circulating fan's ability to promote air circulation does not increase synchronously), high-temperature air will accumulate inside the protective sleeve and cannot flow quickly to the radiant tube. Significant heat loss occurs during the flow of high-temperature air to the radiant tube. Precise temperature control of the target area cannot be guaranteed. If the output power of the thyristor is reduced, the air heating capacity of the electric heating unit will be reduced. If the air volume in the protective sleeve is not reduced simultaneously, the high-temperature air will flow rapidly to the radiant tube. During the flow of the high-temperature air to the radiant tube, there is only a small heat loss, which cannot ensure precise temperature control of the target area. Therefore, it is necessary to adjust the operating frequency of the inverter based on the target output power and the target air pressure difference to precisely match the air circulation capacity of the circulating fan with the air heating capacity of the electric heating unit, so as to further ensure precise temperature control of the target area.

[0051] In this embodiment, based on the first target temperature difference, a PID algorithm is used to determine the target output power, and the output power of the thyristor power regulator is adjusted to the target output power so that the temperature of the target area is stabilized near the first predetermined temperature, thereby ensuring precise control of the temperature of the target area. Based on the target output power and the target air pressure difference, the operating frequency of the frequency converter is adjusted so that the ability of the circulating fan to promote air circulation is precisely matched with the ability of the electric heating unit to heat the air, thereby further ensuring precise control of the temperature of the target area.

[0052] To ensure the safe operation of zero-carbon integrated heating equipment and to ensure precise temperature control of the target area, in one optional embodiment, such as Figure 1 and Figure 2 As shown, the aforementioned zero-carbon integrated heating equipment also includes: The fourth temperature acquisition module 67 is installed at the air inlet of the protective sleeve 30. Based on the target output power and target wind pressure difference, the operating frequency of the inverter is adjusted, including: When the target wind pressure difference does not meet the third predetermined condition, the operating frequency of the inverter is adjusted to the maximum operating frequency. The third predetermined condition is that the target wind pressure difference is greater than the first predetermined wind pressure difference. When the target wind pressure difference meets the third predetermined condition, the operating frequency of the inverter is adjusted based on the target output power and the second target temperature difference. The second target temperature difference is the difference between the second detection temperature and the fourth detection temperature, and the fourth detection temperature is the temperature collected by the fourth temperature acquisition module.

[0053] In this embodiment, if the target air pressure difference is not greater than the first predetermined air pressure difference, it is determined that the ability of the circulating fan to promote air circulation is very low, and that high-temperature air is excessively accumulated in the protective sleeve. At this time, the operating frequency of the frequency converter is adjusted to the maximum operating frequency to avoid the temperature of the electric heating unit being too high, to prevent the electric heating unit from overheating and being damaged or burned, and to prevent the risk of fire, so as to ensure the safe operation of the zero-carbon integrated heating equipment. If the target air pressure difference is greater than the first predetermined air pressure difference, the operating frequency of the frequency converter is adjusted based on the target output power and the target air pressure difference, so that the ability of the circulating fan to promote air circulation is precisely matched with the ability of the electric heating unit to heat the air, so as to further ensure the precise control of the temperature of the target area.

[0054] To ensure the safe operation of the zero-carbon integrated heating equipment, in one optional embodiment, adjusting the operating frequency of the inverter based on the aforementioned target output power and the second target temperature difference can be achieved as follows: Based on the target output power and the second target temperature difference, the target mass flow rate is determined using the formula M=Q / C*△T, where M is the target mass flow rate, Q is the target output power, C is the specific heat capacity of air at constant pressure, and △T is the second target temperature difference. Specifically, in the formula M=Q / C*△T, " / " represents division and "*" represents multiplication.

[0055] Based on the target mass flow rate and the predetermined lookup table, the target operating frequency is determined. The predetermined lookup table contains multiple mapping relationships between mass flow rates and operating frequencies. The target operating frequency is the operating frequency corresponding to the target mass flow rate in the predetermined lookup table. Adjust the operating frequency of the aforementioned frequency converter to the aforementioned target operating frequency; In this embodiment, the target mass flow rate is calculated using the formula M=Q / C*△T. The operating frequency corresponding to the target mass flow rate is used by a predetermined lookup table, and the operating frequency of the frequency converter is adjusted to the target operating frequency. This ensures that the ability of the circulating fan to promote air circulation is precisely matched with the ability of the electric heating unit to heat the air, thereby further ensuring precise control of the temperature in the target area.

[0056] To facilitate operators in monitoring the operating status of zero-carbon integrated heating equipment, such as Figure 1 , Figure 2 and Figure 3 As shown, the aforementioned zero-carbon integrated heating equipment also includes: Display device 91; Wind speed acquisition module 68, which is installed at the air outlet of the radiant tube 50. The control module 90 is used to control the display device 91 to display the first operating information. The first operating information includes at least: the first predetermined temperature, the first detected temperature, the second detected temperature, the third detected temperature, the first wind pressure value, the second wind pressure value, the wind speed value collected by the wind speed acquisition module 68, and the power percentage. The power percentage is the ratio of the output power of the thyristor power regulator 70 to the maximum output power of the thyristor power regulator 70.

[0057] Specifically, the display device is also used to receive the first predetermined temperature, the safe temperature threshold, the second predetermined temperature and the first predetermined wind pressure difference, and send the first predetermined temperature, the safe temperature threshold, the second predetermined temperature and the first predetermined wind pressure difference to the control module.

[0058] In this embodiment, the display device displays operating information such as temperature, wind pressure, wind speed and power percentage in real time, which makes it convenient for operators to monitor the operating status of the zero-carbon integrated heating equipment.

[0059] To facilitate operators in monitoring the operational status of the zero-carbon integrated heating equipment, in one optional embodiment, such as Figure 2 As shown, the aforementioned zero-carbon integrated heating equipment also includes: The control module 90 is used to control the display device 91 to display the second operating information, which includes the above-mentioned multiple electrical parameter values.

[0060] Specifically, the power supply and the thyristor power regulator are connected via three-phase power supply lines. The detection module can be implemented using a smart meter. Multiple electrical parameter values ​​can also include: the voltage value of each phase power supply line and the current value of each phase power supply line.

[0061] In this embodiment, the electrical parameter values ​​of the device power supply are displayed to facilitate operators to monitor the power supply's operating status in real time.

[0062] To facilitate operators in monitoring the operating status of the zero-carbon integrated heating equipment, in one optional embodiment, the control module is used for: When the wind speed value collected by the wind speed acquisition module is less than the predetermined wind speed value and the target wind pressure difference is less than the second predetermined wind pressure difference, the display device is controlled to display the first alarm information, which indicates that the circulating fan has malfunctioned. Specifically, the second predetermined wind pressure difference is much smaller than the first predetermined wind pressure difference.

[0063] When at least one of the aforementioned electrical parameter values ​​is not within the corresponding predetermined parameter value range, the display device is controlled to display a second alarm message. The second alarm message at least indicates that the power supply has failed, and one of the aforementioned electrical parameter values ​​corresponds to one of the aforementioned predetermined parameter value ranges.

[0064] Specifically, for example, if the current value of phase A power supply line is not within the corresponding predetermined current value range, it indicates that the power supply has failed.

[0065] In this embodiment, the first and second alarm information of the display device are used to enable operators to monitor the operating status of the circulating fan and the operating status of the power supply in real time.

[0066] In one alternative embodiment, such as Figure 6 As shown, the heater also includes: Multiple fixing plates 22 are provided, and multiple positioning holes 23 are formed on the fixing plates 22. The multiple positioning holes 23 correspond one-to-one with the multiple electric heating rods of the electric heating unit. The electric heating rods are inserted into the corresponding positioning holes. The fixing plates 22 are made of stainless steel.

[0067] In this embodiment, multiple fixing plates are provided in the heater. These fixing plates can be located at different heights of the heater. The electric heating rod is inserted into the corresponding positioning hole of the fixing plate, which ensures the long-term stability of the internal structure of the heater.

[0068] In one alternative embodiment, such as Figure 1 As shown, the zero-carbon integrated heating equipment also includes: a protective casing 11.

[0069] Specifically, the protective casing is made of stainless steel.

[0070] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0071] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A zero-carbon integrated heating device, characterized in that, The zero-carbon integrated heating equipment includes: power supply; A heater, comprising: an electric heating unit and a protective sleeve, wherein the electric heating unit is connected to the power supply, the electric heating unit is disposed inside the protective sleeve, and the electric heating unit is used to heat the air inside the protective sleeve; A circulating fan is connected to the power supply and is connected to the protective sleeve. The circulating fan is used to promote air circulation inside the protective sleeve. A radiant tube, the air inlet of which is connected to the air outlet of the protective sleeve, is used to be heated by high-temperature air from the protective sleeve and to radiate infrared rays into the air of the target area to heat the air in the target area.

2. The zero-carbon integrated heating equipment according to claim 1, characterized in that, The zero-carbon integrated heating equipment includes: A first temperature acquisition module is disposed within the target area; A thyristor power regulator, wherein the input terminal of the thyristor power regulator is connected to the power supply, and the output terminal of the thyristor power regulator is connected to the electric heating unit; A frequency converter, wherein the input terminal of the frequency converter is connected to the power supply, and the output terminal of the frequency converter is connected to the control terminal of the circulating fan; The control module is used to adjust the output power of the thyristor power regulator and the operating frequency of the frequency converter based at least on a first target temperature difference, so as to increase the temperature of the target area. The first target temperature difference is the difference between a first detected temperature and a first predetermined temperature, and the first detected temperature is the temperature acquired by the first temperature acquisition module.

3. The zero-carbon integrated heating equipment according to claim 2, characterized in that, The zero-carbon integrated heating equipment also includes: The second temperature acquisition module is disposed on the inner wall of the protective sleeve; The control module is used to adjust the output power of the thyristor to zero and the operating frequency of the frequency converter to the maximum operating frequency when the second detected temperature does not meet the first predetermined condition, so as to reduce the temperature of the electric heating unit. When the second detected temperature meets the first predetermined condition, the control module adjusts the output power of the thyristor and the operating frequency of the frequency converter based at least on the first target temperature difference. The second detected temperature is the temperature collected by the second temperature acquisition module. The first predetermined condition is that the second detected temperature is not greater than a safe temperature threshold, and the safe temperature threshold is the maximum temperature allowed for safe operation of the electric heating unit.

4. The zero-carbon integrated heating equipment according to claim 3, characterized in that, The zero-carbon integrated heating equipment also includes: The third temperature acquisition module is located at the air outlet of the protective sleeve. The control module is configured to: maintain the output power of the thyristor power regulator and maintain the operating frequency of the frequency converter at a constant level when the second detected temperature meets the first predetermined condition and the third detected temperature does not meet the second predetermined condition; adjust the output power of the thyristor power regulator to zero and adjust the operating frequency of the frequency converter to the maximum operating frequency when the second detected temperature does not meet the first predetermined condition and the third detected temperature does not meet the second predetermined condition; adjust the output power of the thyristor power regulator to zero and adjust the operating frequency of the frequency converter to the maximum operating frequency when the second detected temperature does not meet the first predetermined condition and the third detected temperature meets the second predetermined condition; and adjust the output power of the thyristor power regulator and the operating frequency of the frequency converter, at least based on the first target temperature difference, when the second detected temperature meets the first predetermined condition and the third detected temperature meets the second predetermined condition. The third detected temperature is the temperature acquired by the third temperature acquisition module, and the second predetermined condition is that the third detected temperature is less than the second predetermined temperature.

5. The zero-carbon integrated heating equipment according to claim 4, wherein the power supply is a three-phase voltage source, characterized in that, The zero-carbon integrated heating equipment also includes: The detection module has a through hole through which the three-phase power supply lines of the power supply pass. The detection module is used to collect multiple electrical parameter values, which include at least the line voltage of the three-phase power supply lines. The first wind pressure acquisition module is located at the air outlet of the radiant tube; The second wind pressure acquisition module is located at the air inlet of the radiant tube; Adjusting the output power of the thyristor and the operating frequency of the frequency converter, at least based on the first target temperature difference, includes: Based on the first target temperature difference, the initial output power is determined using a PID algorithm; Based on the detected voltage and a preset lookup table, a target power adjustment amount is determined. The lookup table contains multiple preset voltages and preset power adjustment amounts. The target power adjustment amount is the preset power adjustment amount corresponding to the detected voltage in the preset lookup table. The target output power is obtained by summing the initial output power and the target power adjustment amount. Adjust the output power of the thyristor to the target output power; Based on the target output power and the target wind pressure difference, the operating frequency of the frequency converter is adjusted. The target wind pressure difference is the difference between a first wind pressure value and a second wind pressure value. The first wind pressure value is the wind pressure value collected by the first wind pressure acquisition module, and the second wind pressure value is the wind pressure value collected by the second wind pressure acquisition module.

6. The zero-carbon integrated heating equipment according to claim 5, characterized in that, The zero-carbon integrated heating equipment also includes: A fourth temperature acquisition module is provided at the air inlet of the protective sleeve. Based on the target output power and target wind pressure difference, the operating frequency of the frequency converter is adjusted, including: When the target wind pressure difference does not meet the third predetermined condition, the operating frequency of the frequency converter is adjusted to the maximum operating frequency, wherein the third predetermined condition is that the target wind pressure difference is greater than the first predetermined wind pressure difference; When the target wind pressure difference meets the third predetermined condition, the operating frequency of the inverter is adjusted based on the target output power and the second target temperature difference. The second target temperature difference is the difference between the second detection temperature and the fourth detection temperature, and the fourth detection temperature is the temperature collected by the fourth temperature acquisition module.

7. The zero-carbon integrated heating equipment according to claim 6, characterized in that, Based on the target output power and the second target temperature difference, the operating frequency of the frequency converter is adjusted, including: Based on the target output power and the second target temperature difference, the target mass flow rate is determined using the formula M=Q / C*△T, where M is the target mass flow rate, Q is the target output power, C is the specific heat capacity of air at constant pressure, and △T is the second target temperature difference. Based on the target mass flow rate and a predetermined lookup table, a target operating frequency is determined. The predetermined lookup table contains multiple mapping relationships between mass flow rates and operating frequencies. The target operating frequency is the operating frequency corresponding to the target mass flow rate in the predetermined lookup table. Adjust the operating frequency of the frequency converter to the target operating frequency.

8. The zero-carbon integrated heating equipment according to claim 5, characterized in that, The zero-carbon integrated heating equipment also includes: Display devices; A wind speed acquisition module is installed at the air outlet of the radiant tube; The control module is used to control the display device to display first operating information, which includes at least: the first predetermined temperature, the first detected temperature, the second detected temperature, the third detected temperature, the first wind pressure value, the second wind pressure value, the wind speed value collected by the wind speed acquisition module, and the power percentage, wherein the power percentage is the ratio of the output power of the thyristor to the maximum output power of the thyristor.

9. The zero-carbon integrated heating equipment according to claim 8, characterized in that, The zero-carbon integrated heating equipment also includes: The control module is used to control the display device to display second operating information, which includes the plurality of electrical parameter values.

10. The zero-carbon integrated heating equipment according to claim 9, characterized in that, The control module is used for: When the wind speed value collected by the wind speed acquisition module is less than the predetermined wind speed value and the target wind pressure difference is less than the second predetermined wind pressure difference, the display device is controlled to display the first alarm information, which indicates that the circulating fan has malfunctioned. When at least one of the electrical parameter values ​​is not within the corresponding predetermined parameter value range, the display device is controlled to display a second alarm message, the second alarm message indicating at least a power supply failure, and one of the electrical parameter values ​​corresponds to one of the predetermined parameter value ranges.

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