Photoelectric heating furnace control system

Abstract

The invention relates to the technical field of heating furnaces, and particularly discloses a photoelectric heating furnace control system, which comprises an electric heating furnace, a photovoltaic power generation assembly, a mains supply power supply and a photoelectric heating controller, and is characterized in that the mains supply power supply and the photovoltaic power generation assembly are connected with the input end of the photoelectric heating controller; the electric heating furnace is connected with the output end of the photoelectric heating controller. The photoelectric heating controller comprises a mains supply rectification module, a photovoltaic voltage control module, a direct current energy storage module, an energy complementation controller and a PLC control module. And a plurality of detection sensors are arranged on the electric heating furnace and are connected with the PLC control module. According to the control system of the photoelectric heating furnace, solar photovoltaic power generation is used for providing energy for the electric heating furnace in the daytime, mains supply is used for providing energy at night or in the absence of illumination conditions, photovoltaic electric energy is self-generated and self-used, zero emission of pollution is achieved, and gas consumption and carbon dioxide emission are greatly reduced; and photovoltaic power generation is preferentially used to assist commercial power supplement, and the new energy access proportion is high.

Description

Technical Field

[0001] The present invention relates to the technical field of heating furnaces, and in particular to a photoelectric heating furnace control system. Background Art

[0002] Under the background of the country's "dual carbon" policy, all industries are striving to achieve expansion and transformation in the new energy business sector. The traditional gas heating method in oil and gas sites can hardly meet the requirements of the country's macroeconomic policies, and there is an urgent need to upgrade and transform the heating method.

[0003] In this context, electric heating furnaces were successfully developed and put on the market. Electric heating furnaces use electricity as energy for heating. Their heating principle is the same as that of gas heating furnaces, which use water phase change heat transfer technology for indirect heating. Compared with traditional heating furnaces or electric heating furnaces, photovoltaic heating furnaces not only use city electricity as an energy source, but also use photovoltaic power generation to provide energy by taking advantage of their regional characteristics.

[0004] However, the existing photovoltaic heating furnace cannot achieve an optimal balance between photovoltaic power generation and city power supply during operation, resulting in excessive city power consumption and surplus photovoltaic power generation. This runs counter to the "energy saving" idea advocated by the country. Therefore, people in this field are in urgent need of finding a new technical solution to solve the above problems. Summary of the invention

[0005] In view of the technical problems in the prior art, the present invention provides a photoelectric heating furnace control system.

[0006] The present invention includes a photoelectric heating furnace control system, the system includes an electric heating furnace, a photovoltaic power generation component, a mains power supply and a photoelectric heating controller, the mains power supply and the photovoltaic power generation component are connected to the input end of the photoelectric heating controller, the electric heating furnace is connected to the output end of the photoelectric heating controller, and the photoelectric heating controller includes a mains rectifier module, a photovoltaic voltage control module, a DC energy storage module, an energy complementary controller, and a PLC control module; wherein,

[0007] The mains rectifier module is connected to the mains power supply, and is used to convert the alternating current output by the mains power supply into a first direct current voltage;

[0008] The photovoltaic voltage control module is connected to the photovoltaic power generation component, and the photovoltaic voltage control module is used to use the voltage of the photovoltaic power generation component as a DC source to output a second DC voltage externally;

[0009] The electric heating furnace is provided with a number of detection sensors, which are connected to the PLC control module and are used to send operating parameter detection values ​​to the PLC control module; the PLC control module is used to generate voltage adjustment instructions according to the operating parameter detection values;

[0010] The energy complementary controller is connected to the AC rectifier module, the photovoltaic voltage control module, the DC energy storage module and the PLC control module. The energy complementary controller is used to compare the value of the second DC voltage with the preset operating voltage setting threshold. If the second DC voltage is greater than the operating voltage setting threshold, the operating AC voltage is output to the electric heating furnace in combination with the voltage adjustment instruction, and the remaining voltage is distributed to the DC energy storage module; if the second DC voltage is equal to the operating voltage setting threshold, the operating AC voltage is output to the electric heating furnace in combination with the voltage adjustment instruction; if the second DC voltage is less than the operating voltage setting threshold, the operating AC voltage is output to the electric heating furnace according to the preset voltage complementary strategy and the voltage adjustment instruction; the voltage complementary strategy includes: if the value of the second DC voltage is not zero, part of the first DC voltage is matched according to the size of the second DC voltage, and the operating AC voltage is output to the electric heating furnace in combination with the voltage adjustment instruction; if the value of the second DC voltage is zero, the operating AC voltage is output to the electric heating furnace according to the first DC voltage and the voltage adjustment instruction, and the operating AC voltage is less than or equal to the voltage of the AC power supply.

[0011] Furthermore, the electric heating furnace comprises a furnace body with a hollow interior, at least one electric heating tube, a heat exchange pipeline and supporting legs for supporting the furnace body; wherein,

[0012] The internal space of the furnace body is vacuum and is divided into an upper heat exchange space and a lower heating space. The electric heating tube is located in the heating space, and the heat exchange pipeline is located in the heat exchange space. The first and last ports of the heat exchange pipeline are located outside the furnace body, which are the refrigerant inlet and the heat medium outlet respectively. The heating space is filled with distilled water.

[0013] The electric heating tube is connected to the energy complementary controller;

[0014] Temperature sensors and flow sensors are installed on the refrigerant inlet and the heat medium outlet; a temperature sensor is installed in the furnace body; all temperature sensors and flow sensors are connected to the PLC control module.

[0015] Furthermore, the energy complementary controller is used to compare the preset operating voltage setting threshold with the value of the second DC voltage, including:

[0016] The energy complementary controller obtains n second voltage values ​​U within the first set time t i , where i∈[1,n];

[0017] For n second voltage values ​​U i Find the average voltage value;

[0018] Calculated based on the average voltage value Let X be the value of the second DC voltage.

[0019] Furthermore, the PLC control module is used to generate a voltage adjustment instruction according to the operating parameter detection value, including:

[0020] The PLC control module obtains the refrigerant inlet temperature value T in , heat medium outlet temperature value T out , refrigerant inlet flow value F in , heat medium outlet flow value F out ;

[0021] Calculate the voltage regulation factor:

[0022]

[0023] Wherein, c is the specific heat capacity of the medium to be heated in the heat exchange pipeline, k, K1, K2, K3, K4 are preset coefficient values; T1 is the set value of the refrigerant inlet temperature, T2 is the set value of the heat medium outlet temperature, and F is the set value of the flow rate of the medium to be heated;

[0024] A voltage adjustment instruction is generated according to the voltage adjustment coefficient.

[0025] Furthermore, K1+K2+K3+K4=1.

[0026] Further, in combination with the voltage adjustment instruction, an operating AC voltage is output to the electric heating furnace, including:

[0027] Calculate the voltage adjustment value based on the voltage adjustment coefficient Among them, U 设 is the refrigerant inlet temperature T in , heat medium outlet temperature value T out , refrigerant inlet flow value F in , heat medium outlet flow value F out The DC voltage values ​​when they meet the set values ​​respectively;

[0028] The corresponding AC voltage is output according to the voltage adjustment value as the operating AC voltage of the electric heating furnace.

[0029] Furthermore, the PLC control module is used to generate a voltage adjustment instruction according to the operating parameter detection value, including:

[0030] The PLC control module obtains the refrigerant inlet temperature value T in , heat medium outlet temperature value T out , refrigerant inlet flow value F in , heat medium outlet flow value F out , furnace temperature value T 炉 ;

[0031] Calculate the voltage regulation factor:

[0032]

[0033] , where c is the specific heat capacity of the medium to be heated in the heat exchange pipeline, k, K1, K2, K3, K4, K5 are preset coefficient values; T1 is the set value of the refrigerant inlet temperature, T2 is the set value of the heat medium outlet temperature, F is the set value of the flow rate of the medium to be heated, and T3 is the set value of the furnace temperature;

[0034] A voltage adjustment instruction is generated according to the voltage adjustment coefficient.

[0035] Furthermore, K1+K2+K3+K4+K5=1.

[0036] Further, in combination with the voltage adjustment instruction, an operating AC voltage is output to the electric heating furnace, including:

[0037] Calculate the voltage adjustment value based on the voltage adjustment coefficient Among them, U 设 is the refrigerant inlet temperature T in , heat medium outlet temperature value T out , refrigerant inlet flow value F in , heat medium outlet flow value F out , furnace temperature value T 炉 The DC voltage values ​​when they meet the set values ​​respectively;

[0038] The corresponding AC voltage is output according to the voltage adjustment value as the operating AC voltage of the electric heating furnace.

[0039] Furthermore, the output voltage of the mains power supply is AC 380V, the first DC voltage is DC 560V; the refrigerant inlet temperature value T in , heat medium outlet temperature value T out , refrigerant inlet flow value F in , heat medium outlet flow value F out , furnace temperature value T 炉 The DC voltage value U when it meets the set value 设 It is DC 540V.

[0040] The photoelectric heating furnace control system of the present invention has the following beneficial effects:

[0041] (1) The photoelectric heating furnace control system of the present invention comprises an electric heating furnace, a photovoltaic power generation component, a mains power supply and a photoelectric heating controller, wherein the photoelectric heating controller comprises a mains rectifier module, a photovoltaic voltage control module, a DC energy storage module, an energy complementary controller and a PLC control module, wherein the mains rectifier module is used to convert the alternating current outputted from the mains power supply into a first DC voltage, the photovoltaic voltage control module is used to use the voltage of the photovoltaic power generation component as a DC source to output a second DC voltage externally, the electric heating furnace is provided with a plurality of detection sensors for sending operating parameter detection values ​​to the PLC control module, the PLC control module is used to generate a voltage adjustment instruction according to the operating parameter detection values, and the energy complementary controller is used to set the operating voltage according to a preset value. The set threshold is compared with the value of the second DC voltage. If the second DC voltage is greater than the operating voltage setting threshold, the operating AC voltage is output to the electric heating furnace in combination with the voltage adjustment instruction, and the remaining voltage is distributed to the DC energy storage module; if the second DC voltage is equal to the operating voltage setting threshold, the operating AC voltage is output to the electric heating furnace in combination with the voltage adjustment instruction; if the second DC voltage is less than the operating voltage setting threshold, the operating AC voltage is output to the electric heating furnace according to the preset voltage complementary strategy and the voltage adjustment instruction, thereby realizing the automatic conversion function between photovoltaic power and municipal power. On the premise of ensuring that the electric heating furnace operates up to standard, photovoltaic power is given priority and municipal power is used as a supplement, so as to realize the most effective utilization of green energy and greatly reduce the equipment operation cost.

[0042] (2) The photoelectric heating furnace control system of the present invention uses solar photovoltaic power generation to provide energy for the electric heating furnace during the day, and uses municipal electricity as the main energy source at night or when there is no light condition. Photovoltaic power is self-generated and used for self-use, achieving zero pollution emission, and reducing gas consumption and carbon dioxide emissions significantly annually. The electric heating furnace has a very high thermal efficiency of electric energy, and the comprehensive thermal efficiency can reach 98%. The proportion of new energy access is high, photovoltaic power generation is used first, supplemented by municipal electricity, and the photovoltaic access ratio is 100%. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 A structural diagram of a photoelectric heating furnace control system according to an embodiment of the present invention;

[0045] Among them: 10-electric heating furnace, 20-photovoltaic power generation component, 30-mains power supply, 40-photovoltaic heating controller, 401-mains rectifier module, 402-photovoltaic voltage control module, 403-DC energy storage module, 404-energy complementary controller, 405-PLC control module. DETAILED DESCRIPTION

[0046] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0047] A photoelectric heating furnace control system according to an embodiment of the present invention, such as Figure 1 As shown, the system includes an electric heating furnace 10, a photovoltaic power generation component 20, a mains power supply 30 and a photoelectric heating controller 40. The mains power supply 30 and the photovoltaic power generation component 10 are connected to the input end of the photoelectric heating controller 40, and the electric heating furnace 10 is connected to the output end of the photoelectric heating controller 40. The photoelectric heating controller 40 includes a mains rectifier module 401, a photovoltaic voltage control module 402, a DC energy storage module 403, an energy complementary controller 404, and a PLC control module 405; wherein,

[0048] The mains rectifier module 401 is connected to the mains power supply source 30, and the mains rectifier module 401 is used to convert the alternating current output by the mains power supply source 30 into a first direct current voltage;

[0049] The photovoltaic voltage control module 402 is connected to the photovoltaic power generation component 20, and the photovoltaic voltage control module 402 is used to use the voltage of the photovoltaic power generation component 20 as a DC source to output a second DC voltage externally;

[0050] The electric heating furnace 10 is provided with a plurality of detection sensors, which are connected to the PLC control module 405 and are used to send the operating parameter detection value to the PLC control module 405; the PLC control module 405 is used to generate a voltage adjustment instruction according to the operating parameter detection value;

[0051] The energy complementary controller 404 is connected to the mains rectifier module 401, the photovoltaic voltage control module 402, the DC energy storage module 403, and the PLC control module 405. The energy complementary controller 404 is used to compare the value of the second DC voltage with the preset operating voltage setting threshold. If the second DC voltage is greater than the operating voltage setting threshold, the operating AC voltage is output to the electric heating furnace 10 in combination with the voltage adjustment instruction, and the remaining voltage is allocated to the DC energy storage module 403; if the second DC voltage is equal to the operating voltage setting threshold, the operating AC voltage is output to the electric heating furnace 10 in combination with the voltage adjustment instruction; if the second DC voltage is less than the operating voltage setting threshold, the operating AC voltage is output to the electric heating furnace 10 according to the preset voltage complementary strategy and the voltage adjustment instruction; the voltage complementary strategy includes: if the value of the second DC voltage is not zero, a part of the first DC voltage is matched according to the size of the second DC voltage, and the operating AC voltage is output to the electric heating furnace 10 in combination with the voltage adjustment instruction; if the value of the second DC voltage is zero, the operating AC voltage is output to the electric heating furnace according to the first DC voltage and the voltage adjustment instruction, and the operating AC voltage is less than or equal to the voltage of the mains power supply.

[0052] The photoelectric heating furnace control system of the embodiment of the present invention realizes the automatic conversion function between photovoltaic power and municipal electricity by monitoring the value of the second DC voltage in real time and comparing it with the operating voltage setting threshold, and performing corresponding voltage regulation operations under different size relationships. On the premise of ensuring that the electric heating furnace operates up to standard, photovoltaic power is given priority and municipal electricity is used as a supplement, thereby realizing the most effective utilization of green energy and greatly reducing the equipment operating costs.

[0053] Specifically, the electric heating furnace 10 of the embodiment of the present invention includes a furnace body with a hollow interior, at least one electric heating tube, a heat exchange pipeline and support legs for supporting the furnace body; wherein the internal space of the furnace body is vacuum and is divided into an upper heat exchange space and a lower heating space, the electric heating tube is located in the heating space, and the heat exchange pipeline is located in the heat exchange space; the first and tail ports of the heat exchange pipeline are located outside the furnace body, which are the refrigerant inlet and the heat medium outlet respectively; the heating space is filled with distilled water; the electric heating tube is connected to an energy complementary controller; the energy complementary controller outputs an operating AC voltage to the electric heating tube, and temperature sensors and flow sensors are installed on the refrigerant inlet and the heat medium outlet for detecting the temperature and flow of the imported refrigerant and the exported heat medium; a temperature sensor is installed in the furnace body for detecting the temperature inside the furnace body; all temperature sensors and flow sensors are connected to a PLC control module, and the PLC control module generates a voltage adjustment instruction based on the various detection values ​​obtained.

[0054] Specifically, the energy complementary controller in the embodiment of the present invention is used to compare the preset operating voltage setting threshold with the value of the second DC voltage, including:

[0055] The energy complementary controller obtains n second voltage values ​​U within the first set time t i , where i∈[1,n];

[0056] For n second voltage values ​​U i Find the average voltage value;

[0057] Calculated based on the average voltage value Let X be the value of the second DC voltage.

[0058] In this embodiment, the value of the second DC voltage is determined by averaging multiple values, thereby avoiding generation of unnecessary voltage adjustment instructions due to voltage mutation.

[0059] In this embodiment, the n second voltage values ​​U obtained within the first set time t can be i Sort from small to large, delete the two smallest values ​​and two largest values ​​at the edge, and then calculate the average voltage value.

[0060] Specifically, in the embodiment of the present invention, the PLC control module is used to generate a voltage adjustment instruction according to the operating parameter detection value, including:

[0061] The PLC control module obtains the refrigerant inlet temperature value T in , heat medium outlet temperature value T out , refrigerant inlet flow value F in , heat medium outlet flow value F out ;

[0062] Calculate the voltage regulation factor:

[0063]

[0064] Wherein, c is the specific heat capacity of the medium to be heated in the heat exchange pipeline, k, K1, K2, K3, K4 are preset coefficient values; T1 is the set value of the refrigerant inlet temperature, T2 is the set value of the heat medium outlet temperature, and F is the set value of the flow rate of the medium to be heated;

[0065] A voltage adjustment instruction is generated according to the voltage adjustment coefficient.

[0066] Among them, K1+K2+K3+K4=1.

[0067] In this embodiment, T1-T in When the value is positive, it means the refrigerant inlet temperature is T in If low, When the value of is positive, it should be the effect of increasing the voltage when it is reflected in the voltage adjustment instruction; Medium F in- When the value obtained by F is positive, it means that the refrigerant inlet flow value F in If it is too large, when it is reflected in the voltage adjustment instruction, it should be the effect of increasing the voltage; T2-T out When the value is positive, it means the heat medium outlet temperature value T out If it is too low, when it is reflected in the voltage adjustment instruction, it should be the effect of increasing the voltage; Medium F out - When the value obtained by F is positive, it means that the heat medium outlet flow value F out If it is too large, when it is reflected in the voltage adjustment instruction, it should be the effect of increasing the voltage.

[0068] At the refrigerant inlet temperature T in Too high, refrigerant inlet flow value F in Small, heat medium outlet temperature value T out High and heat medium outlet flow value F out When it is smaller, the corresponding calculated part is a negative value, which should be the effect of reducing the voltage when reflected in the voltage adjustment instruction.

[0069] Specifically, in the embodiment of the present invention, the energy complementary controller outputs the operating AC voltage to the electric heating furnace in combination with the voltage adjustment instruction, including:

[0070] Calculate the voltage adjustment value U according to the voltage adjustment coefficient 调 =K*U 设 / K', Among them, U 设 is the refrigerant inlet temperature T in , heat medium outlet temperature value T out , refrigerant inlet flow value F in , heat medium outlet flow value F out The DC voltage values ​​that meet the set values ​​are output respectively; and the corresponding AC voltage is output according to the voltage adjustment value as the operating AC voltage of the electric heating furnace.

[0071] Specifically, the PLC control module in another embodiment of the present invention is used to generate a voltage adjustment instruction according to the operating parameter detection value, including:

[0072] The PLC control module obtains the refrigerant inlet temperature value T in , heat medium outlet temperature value T out , refrigerant inlet flow value F in , heat medium outlet flow value F out , furnace temperature value T 炉 ;

[0073] Calculate the voltage regulation factor:

[0074]

[0075] , where c is the specific heat capacity of the medium to be heated in the heat exchange pipeline, k, K1, K2, K3, K4, K5 are preset coefficient values; T1 is the set value of the refrigerant inlet temperature, T2 is the set value of the heat medium outlet temperature, F is the set value of the flow rate of the medium to be heated, and T3 is the set value of the furnace temperature;

[0076] A voltage adjustment instruction is generated according to the voltage adjustment coefficient.

[0077] Among them, K1+K2+K3+K4+K5=1.

[0078] Compared with the previous embodiment, this embodiment adds consideration to the temperature in the furnace. T3-T 炉 When the value is positive, it means the furnace temperature value T 炉 If the temperature is lower than the set value of the furnace temperature, the voltage needs to be increased. 炉 When the value is negative, it means the furnace temperature value T 炉 If the temperature is higher than the set value of the furnace temperature, the voltage needs to be reduced.

[0079] Specifically, the energy complementary controller in another embodiment of the present invention outputs an operating AC voltage to the electric heating furnace in combination with a voltage adjustment instruction, including:

[0080] The energy complementary controller calculates the voltage adjustment value U according to the voltage adjustment coefficient 调 =K*U 设 / K', Among them, U 设 is the refrigerant inlet temperature T in , heat medium outlet temperature value T out , refrigerant inlet flow value F in , heat medium outlet flow value F out , furnace temperature value T 炉 The DC voltage values ​​when they meet the set values ​​respectively;

[0081] The energy complementary controller outputs a corresponding AC voltage according to the voltage adjustment value as the operating AC voltage of the electric heating furnace.

[0082] In combination with the above embodiments, the output voltage of the mains power supply of the present invention is AC 380V, the first DC voltage is DC 560V; the refrigerant inlet temperature value T in , heat medium outlet temperature value T out , refrigerant inlet flow value F in , heat medium outlet flow value F out , furnace temperature value T 炉 The DC voltage value U when it meets the set value 设It is DC 540V. This set of voltage operating values ​​is only one implementation method. Those skilled in the art can also adaptably match it according to the product parameters of the electric heating furnace, which are not listed here one by one.

[0083] The photoelectric heating furnace control system of the embodiment of the present invention uses solar photovoltaic power generation to provide energy for the electric heating furnace during the day, and mainly uses municipal electricity to provide energy at night or when there is no light condition. The photovoltaic power is self-generated and used for self-use, achieving zero pollution emissions, and reducing gas consumption and carbon dioxide emissions annually by a considerable amount. The electric heating furnace has a very high electrical thermal efficiency, and the comprehensive thermal efficiency can reach 98%. The proportion of new energy access is high, photovoltaic power generation is used first, and municipal electricity is supplemented as an auxiliary, and the photovoltaic access ratio is 100%.

[0084] The present invention is further described above with the aid of specific embodiments. However, it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in the field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A photoelectric heating furnace control system, characterized in that: The system includes an electric heating furnace, a photovoltaic power generation component, a mains power supply and a photoelectric heating controller. The mains power supply and the photovoltaic power generation component are connected to the input end of the photoelectric heating controller, and the electric heating furnace is connected to the output end of the photoelectric heating controller. The photoelectric heating controller includes a mains rectifier module, a photovoltaic voltage control module, a DC energy storage module, an energy complementary controller, and a PLC control module; wherein, The mains rectifier module is connected to the mains power supply, and the mains rectifier module is used to convert the alternating current output by the mains power supply into a first direct current voltage; The photovoltaic voltage control module is connected to the photovoltaic power generation component, and the photovoltaic voltage control module is used to use the voltage of the photovoltaic power generation component as a DC source to output a second DC voltage externally; The electric heating furnace is provided with a plurality of detection sensors, which are connected to the PLC control module and are used to send operating parameter detection values ​​to the PLC control module; the PLC control module is used to generate voltage adjustment instructions according to the operating parameter detection values; The energy complementary controller is connected to the mains rectifier module, the photovoltaic voltage control module, the DC energy storage module, and the PLC control module. The energy complementary controller is used to compare the value of the second DC voltage with the preset operating voltage setting threshold. If the second DC voltage is greater than the operating voltage setting threshold, the operating AC voltage is output to the electric heating furnace in combination with the voltage adjustment instruction, and the remaining voltage is allocated to the DC energy storage module; if the second DC voltage is equal to the operating voltage setting threshold, the operating AC voltage is output to the electric heating furnace in combination with the voltage adjustment instruction; if the second DC voltage is less than the operating voltage setting threshold, the operating AC voltage is output to the electric heating furnace according to the preset voltage complementary strategy and the voltage adjustment instruction; the voltage complementary strategy includes: if the value of the second DC voltage is not zero, a portion of the first DC voltage is matched according to the size of the second DC voltage, and the operating AC voltage is output to the electric heating furnace in combination with the voltage adjustment instruction; if the value of the second DC voltage is zero, the operating AC voltage is output to the electric heating furnace according to the first DC voltage and the voltage adjustment instruction, and the operating AC voltage is less than or equal to the voltage of the mains power supply.

2. A photoelectric heating furnace control system as claimed in claim 1, characterized in that: The electric heating furnace comprises a furnace body with a hollow interior, at least one electric heating tube, a heat exchange pipeline and supporting legs for supporting the furnace body; wherein, The internal space of the furnace body is vacuum and is divided into an upper heat exchange space and a lower heating space. The electric heating pipe is located in the heating space, and the heat exchange pipeline is located in the heat exchange space. The first and last ports of the heat exchange pipeline are located outside the furnace body, which are the refrigerant inlet and the heat medium outlet respectively. The heating space is filled with distilled water. The electric heating tube is connected to the energy complementary controller; The refrigerant inlet and the heat medium outlet are equipped with temperature sensors and flow sensors; the furnace body is equipped with a temperature sensor; and all the temperature sensors and flow sensors are connected to the PLC control module.

3. A photoelectric heating furnace control system as claimed in claim 2, characterized in that: The energy complementary controller is used to set a threshold value according to a preset operating voltage and compare it with the value of the second DC voltage, including: The energy complementary controller obtains n second voltage values ​​U within the first set time t i , where i∈[1,n]; For n second voltage values ​​U i Find the average voltage value; Calculate based on the average voltage value Let X be the value of the second DC voltage.

4. A photoelectric heating furnace control system as claimed in claim 2, characterized in that: The PLC control module is used to generate a voltage adjustment instruction according to the operating parameter detection value, including: The PLC control module obtains the refrigerant inlet temperature value T in , heat medium outlet temperature value T out , Refrigerant inlet flow value F in , heat medium outlet flow value F out ; Calculate the voltage regulation factor: Wherein, c is the specific heat capacity of the medium to be heated in the heat exchange pipeline, k, K1, K2, K3, K4 are preset coefficient values; T1 is the set value of the refrigerant inlet temperature, T2 is the set value of the heat medium outlet temperature, and F is the set value of the flow rate of the medium to be heated; A voltage adjustment instruction is generated according to the voltage adjustment coefficient.

5. A photoelectric heating furnace control system as claimed in claim 4, characterized in that: K1+K2+K3+K4=1.

6. A photoelectric heating furnace control system as claimed in claim 4, characterized in that: The step of outputting an operating AC voltage to the electric heating furnace in combination with the voltage adjustment instruction includes: Calculate the voltage adjustment value U according to the voltage adjustment coefficient 调 =K*U 设 / K', Among them, U 设 is the refrigerant inlet temperature T in , heat medium outlet temperature value T out , Refrigerant inlet flow value F in , heat medium outlet flow value F out The DC voltage values ​​when they meet the set values ​​respectively; The corresponding AC voltage is output according to the voltage adjustment value as the operating AC voltage of the electric heating furnace.

7. A photoelectric heating furnace control system as claimed in claim 2, characterized in that: The PLC control module is used to generate a voltage adjustment instruction according to the operating parameter detection value, including: The PLC control module obtains the refrigerant inlet temperature value T in , heat medium outlet temperature value T out , Refrigerant inlet flow value F in , heat medium outlet flow value F out , furnace temperature value T 炉 ; Calculate the voltage regulation factor: Wherein, c is the specific heat capacity of the medium to be heated in the heat exchange pipeline, k, K1, K2, K3, K4, K5 are preset coefficient values; T1 is the set value of the refrigerant inlet temperature, T2 is the set value of the heat medium outlet temperature, F is the set value of the flow rate of the medium to be heated, and T3 is the set value of the furnace temperature; A voltage adjustment instruction is generated according to the voltage adjustment coefficient.

8. A photoelectric heating furnace control system as claimed in claim 7, characterized in that: K1+K2+K3+K4+K5=1.

9. A photoelectric heating furnace control system as claimed in claim 7, characterized in that: The step of outputting an operating AC voltage to the electric heating furnace in combination with the voltage adjustment instruction includes: Calculate the voltage adjustment value U according to the voltage adjustment coefficient 调 =K*U 设 / K', Among them, U 设 is the refrigerant inlet temperature T in , heat medium outlet temperature value T out , Refrigerant inlet flow value F in , heat medium outlet flow value F out , furnace temperature value T 炉 The DC voltage values ​​when they meet the set values ​​respectively; The corresponding AC voltage is output according to the voltage adjustment value as the operating AC voltage of the electric heating furnace.

10. A photoelectric heating furnace control system as claimed in claim 7, characterized in that: The output voltage of the mains power supply is AC 380V, the first DC voltage is DC 560V; the refrigerant inlet temperature value T in , heat medium outlet temperature value T out , refrigerant inlet flow value F in , heat medium outlet flow value F out , furnace temperature value T 炉 The DC voltage value U when it meets the set value 设 It is DC 540V.

Images