Light wave hot air pizza oven intelligent control system and light wave hot air pizza oven

Abstract

The invention provides a light wave hot air pizza oven intelligent control system which comprises a light wave heating module, a hot air module, a temperature sensor, a humidity sensor and an intelligent control module which are installed in a light wave hot air pizza oven, and the intelligent control module operates according to the following modes: S1, system initialization; s2, according to the set initialization parameters, a hot air module is driven to heat the pizza oven, and meanwhile a temperature sensor and a humidity sensor are called to collect temperature and humidity; s3, the optimal temperature T1 during intervention of the light wave heating module is calculated; and S4, when the temperature sensor detects that the pizza is heated to the optimal intervention temperature T1, a PID calculation program is called to control intervention of the light wave heating module, so that the light wave hot air pizza oven rapidly reaches the set target temperature T2, and the pizza skin is rapidly heated. According to the intelligent control system, the optimal intervention point of light wave heating can be accurately found out, the material surface and the optimal heating strategy of the surface are achieved, and optimization of energy consumption is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of food processing equipment, and in particular to an intelligent control system of a light wave hot air pizza oven and a light wave hot air pizza oven. Background Art

[0002] A hot air stove is a device that heats and cooks food by placing it in a closed space. Existing hot air stoves generally use resistance heating, that is, the heating element is first powered to heat up, part of the heat generated by the heating element is conducted to the air, the other part is radiated to the wall of the gas container, and then part is conducted to the wall of the gas container through the air, and then to the gas through the wall of the gas container, while the other part of the heat radiation is directly conducted to the gas through the wall of the gas container. The heat conducted through the air can reach the gas after two heat conductions. Therefore, this heating method has a large heat loss, a slow heating speed, and consumes a lot of electricity.

[0003] After the light wave oven is powered on, when the current flows through the electric heating wire, the voltage drop is generated, and the power is converted into heat energy. The inert gas of halogen elements is filled in the middle of the electric heating wire glass tube, which generates light radiation, which is concentrated by the concave reflector and reflected to the microcrystalline glass plate and converted into heat energy. The heat energy generated by the electric heating wire is also transferred to the glass microcrystalline plate and heated to the heated object. The heating element of the light wave oven is the light wave tube. After the power is turned on, the light emitted is irradiated to the reflective surface of the concave reflector, and the light radiation is concentrated. The heat energy generated is concentrated and combined with the input power of the light wave tube itself after the power is turned on to generate heat energy. At the same time, the high temperature is transferred to the high-temperature microcrystalline glass plate, and the temperature of the microcrystalline glass plate reaches a high temperature of 600℃-800℃ within a few seconds, and then the heat is transferred to the heated object. This heat transfer method can make the thermal efficiency reach more than 95%, and the heated object is heated efficiently and quickly, which reflects the unique electrical energy and light radiation energy of the light wave oven. The transfer of heat energy is simultaneously converted into heat energy.

[0004] In the actual baking process, high-quality pizza has its own heating requirements, that is, the crust needs to be crispy, but the middle part needs to remain soft and sticky. Existing pizza ovens generally use hot air heating and baking, but the slow baking with hot air has the following main defects: (1) high energy consumption and slow speed. It normally takes 8-20 minutes to bake a pizza; (2) due to low heating efficiency and slow baking speed, it is difficult to achieve the effect of crispy crust while keeping the middle part soft and sticky (because the middle part will gradually become crispy after a long heating time); (3) it is impossible to accurately find the best intervention point of light wave heating, and it is impossible to achieve the best heating strategy for the surface of the material and the surface, and it is impossible to optimize energy consumption. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention proposes a light wave hot air pizza oven intelligent control system and a light wave hot air pizza oven. The intelligent control system can accurately find the best intervention point of light wave heating when using a mixed heating mode of light wave and hot air, realize the best heating strategy for the material surface and the surface, and optimize energy consumption.

[0006] In order to realize the above technical scheme, the present invention provides an intelligent control system of a light wave hot air pizza oven, comprising: a light wave heating module, a hot air module, a temperature sensor, a humidity sensor and an intelligent control module installed in the light wave hot air pizza oven, wherein the intelligent control module is electrically connected to the light wave heating module, the hot air module, the temperature sensor and the humidity sensor respectively, and the intelligent control module operates in the following manner:

[0007] S1, system initialization;

[0008] S2. According to the set initialization parameters, drive the hot air module to heat the pizza oven, and call the temperature sensor and humidity sensor to collect temperature and humidity;

[0009] S3, calculating the optimal temperature T1 when the light wave heating module is involved;

[0010] S4. When the temperature sensor detects that the pizza is heated to the optimal intervention temperature T1, the PID calculation program is called to control the light wave heating module to intervene, so that the light wave hot air pizza oven quickly reaches the set target temperature T2 and quickly heats the pizza crust.

[0011] Preferably, in step S3, the optimal temperature T1 when the light wave heating module is involved is calculated in the following manner:

[0012] S31. According to Newton's law of cooling, when an object is exposed to hot air, its surface temperature will gradually approach the temperature of the hot air over time. The calculation formula for the change in the surface temperature of the object is as follows:

[0013] T(t)=T 环境 +(T 初始 -T 环境 ) -kt Formula 1

[0014] Where T(t) is the temperature of the material at time t, T 环境 is the temperature of hot air, T 初始 is the initial temperature of the material, k is a positive constant that depends on the properties of the material and the hot air, and t is the heating time;

[0015] S32. A regression equation is established with drying time as an influencing factor. The optimization equation for drying time and process parameters is:

[0016]

[0017] In formula 1, is the drying time for the material surface to rise from temperature T1 to target temperature T2 during light wave heating, min; X1 is the light wave temperature control temperature, ℃; X2 is the drying time per cycle, min; X3 is the temperature difference, i.e. T2-T1, ℃;

[0018] S33. The light wave tube in the light wave heating module converts electrical energy into thermal energy. The electrothermal equivalent is derived from the electric power calculation formula:

[0019]

[0020] In formula 2, Q is the heat generated by the resistor when it is powered on, in J, U is the working voltage across the resistor, in V, and Rt is the resistance value of the resistor in the working state, in Ω. is the transit time, in h;

[0021] According to Joule's law, the electric power P required to derive thermoelectricity is calculated according to Formula 4:

[0022]

[0023] S34. Based on the required total electrical power P, the system can accurately calculate the time required for the light wave heating process according to Formula 3 and Formula 4. Then, the temperature difference X3 is calculated in reverse according to formula 2. Since the target temperature T2 is known, the material surface temperature T1 can be accurately calculated. This is the best time to intervene in light wave heating.

[0024] Preferably, in step S4, the process of calling the PID calculation program to control the intervention of the light wave heating module is as follows:

[0025] S41, determine the fuzzy PID control formula:

[0026]

[0027] Among them, △P is the output value of the PID algorithm result; K P is the proportionality coefficient; e is the deviation; T i is the integration constant; T d is the differential constant; ∞δ

[0028] S42, according to the discrete calculation formula

[0029]

[0030] Wherein, e*(t) is the input signal of the signal sampler. When t=0, the sampler is closed for T seconds, e*(t)=e(t). The smaller the period T is, the more data is obtained and the better the control effect is.

[0031] S43, determine T and T according to formula 6 i , T d , K and the deviation value e at each moment, the operation value of each time period n is calculated, and the processor calculates the operation value to realize fuzzy PID control.

[0032] The present invention also provides a light wave hot air pizza oven, comprising: the above-mentioned light wave hot air pizza oven intelligent control system, and also comprising a mobile shelf box, a light wave hot air oven is installed on the top of the mobile shelf box, a pizza conveyor device passes through the left and right sides of the light wave hot air oven horizontally, a control box is installed on one side of the light wave hot air oven, and a control panel is installed on the control box.

[0033] Preferably, the light wave hot air furnace includes an outer box body, an inner box body is installed in the outer box body, a light wave heating module, a hot air module, a temperature sensor, and a humidity sensor are all installed in the inner box body, the hot air module includes a fan installed on the top of the inner box body and arranged vertically downward, an annular electric heating tube is installed on the periphery of the fan blades at the front end of the fan, and a uniform wind hole plate is installed on the top of the inner box body below the annular electric heating tube, and uniform wind holes are evenly opened on the surface of the uniform wind hole plate; the light wave heating module includes a plurality of upper carbon fiber light wave tubes installed in the inner box body and below the uniform wind hole plate, and a plurality of lower carbon fiber light wave tubes installed at the bottom of the inner box body, and the pizza conveying device passes through the left and right sides of the inner box of the light wave hot air furnace in the horizontal direction and is located between the upper carbon fiber light wave tube and the lower carbon fiber light wave tube.

[0034] Preferably, the pizza conveyor includes a frame, which is fixedly mounted on the top of the mobile shelf box, with an active roller and a passive roller respectively mounted on the left and right ends of the frame, a plurality of chain transmission gears are correspondingly mounted on the active roller and the passive roller, a ring transmission chain is mounted between the corresponding chain transmission gears, and the conveying motor is mounted on one side of the active roller and connected to the transmission shaft of the active roller.

[0035] Preferably, a support and protection frame is installed between the upper carbon fiber light wave tube and the lower carbon fiber light wave tube in the inner box of the light wave hot air furnace, the upper end of the annular transmission chain passes over the support and protection frame, and the lower end of the annular transmission chain passes under the support and protection frame.

[0036] Preferably, heat dissipation holes are evenly arranged on the back plate of the outer box body, two heat dissipation fans arranged in parallel and spaced apart are installed on the top of the back plate, one end of the exhaust pipe is installed on the back plate, and the other end of the exhaust pipe extends into the inner box body.

[0037] Preferably, a shelf is arranged in the movable shelf box, and a plurality of universal wheels are arranged at the bottom of the movable shelf box.

[0038] The beneficial effects of the light wave hot air pizza oven intelligent control system and the light wave hot air pizza oven provided by the invention are:

[0039] (1) The intelligent control system of the light wave hot air pizza oven is highly intelligent. When using the light wave and hot air mixed heating mode, it can accurately find the best intervention point of light wave heating to achieve high-quality pizza baking. First, the pizza is heated slowly at a low temperature by hot air heating to ensure that the pizza is heated evenly. Then, the best intervention point of light wave heating is accurately found, and light wave heating is used to quickly heat the pizza crust, so that the middle part of the pizza with fillings can remain soft and glutinous while achieving the effect of crispy crust, greatly improving the quality of pizza baking, and can effectively reduce energy consumption, realize the best heating strategy for pizza, optimize energy consumption, and reduce the time of pizza baking. Normally, it takes 4-8 minutes to bake a pizza.

[0040] (2) The light wave hot air pizza oven has a simple structure, reasonable design, high intelligence, high heating efficiency, and uniform heat distribution in the oven. In actual operation, the pizza to be baked only needs to be placed on the pizza conveyor, and the pizza conveyor will drive the pizza to be baked from left to right into the inner box of the hot air oven. The annular electric heating tube works to heat the air, and then the heated air is evenly transported from top to bottom through the uniform air hole plate by the fan, ensuring that the hot air in the inner box is evenly distributed, and at the optimal temperature intervention point, the upper carbon fiber light wave tube and the lower carbon fiber light wave tube are controlled to work simultaneously, and the top and bottom surfaces of the pizza are quickly heated at the same time, so that the middle part of the pizza can remain soft and glutinous while achieving a crispy effect on the surface, thereby improving the quality of pizza baking. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a front view of the three-dimensional structure of the light wave hot air pizza oven in the present invention.

[0042] Figure 2 It is a rear view of the three-dimensional structure of the light wave hot air pizza oven in the present invention.

[0043] Figure 3 The internal structure assembly diagram of the light wave hot air pizza oven in the present invention Figure I .

[0044] Figure 4 The internal structure assembly diagram of the light wave hot air pizza oven in the present invention Figure II .

[0045] Figure 5 It is a schematic diagram of the explosion of the internal structure of the light wave hot air pizza oven in the present invention.

[0046] In the figure: 1. Mobile shelf box; 2. Pizza conveyor; 21. Rack; 22. Active roller; 23. Passive roller; 24. Conveying motor; 25. Chain drive gear; 26. Support and protection frame; 3. Light wave hot air furnace; 31. Outer box; 32. Back plate; 33. Inner box; 34. Cooling fan; 35. Smoke exhaust pipe; 36. Fan; 37. Ring electric heating tube; 38. Wind uniformity plate; 39. Intelligent control module; 310. Upper carbon fiber light wave tube; 311. Lower carbon fiber light wave tube; 4. Control box; 5. Control panel; 6. Shelf; 7. Universal wheel. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of 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. All other embodiments obtained by ordinary persons in the art without creative work are within the scope of protection of the present invention.

[0048] Embodiment 1: A light wave hot air pizza oven.

[0049] Reference Figures 1 to 5 As shown, a light wave hot air pizza oven comprises: a mobile shelf box 1, wherein a shelf 6 is arranged inside the mobile shelf box 1 to facilitate temporary storage of pizza before or after baking, and a plurality of universal wheels 7 are arranged at the bottom of the mobile shelf box 1 to facilitate the overall movement of the pizza oven. A light wave hot air oven 3 is installed on the top of the mobile shelf box 1, and a pizza conveyor 2 runs through the left and right sides of the light wave hot air oven 3 in the horizontal direction. The pizza conveyor 2 comprises a frame 21, wherein the frame 21 is fixedly mounted on the top of the mobile shelf box 1, and an active roller 22 and a passive roller 23 are respectively mounted on the left and right ends of the frame 21, and a plurality of chain transmission gears 25 are correspondingly mounted on the active roller 22 and the passive roller 23, and a ring transmission chain is installed between the corresponding chain transmission gears 25, and a conveying motor 24 is mounted on one side of the active roller 22 and connected to the transmission shaft of the active roller 22. During actual operation, the active roller 22 is driven to rotate by the conveying motor 24, which in turn drives the annular transmission chain to rotate. The pizza to be baked is placed on the annular transmission chain and moves from left to right driven by the annular transmission chain. When it moves to the inner box 33 of the hot air oven, it can stop rotating until the pizza is baked, and then take the pizza out of the hot air oven.

[0050] The control box 4 is installed on one side of the light wave hot air oven 3, and a control panel 5 is installed on the control box 4. During actual operation, the working parameters of the pizza oven can be controlled by the control panel 5.

[0051] The light wave hot air furnace 3 includes an outer box body 31, in which an inner box body 33 is installed, a light wave heating module, a hot air module, a temperature sensor, and a humidity sensor are all installed in the inner box body, the hot air module includes a fan 36 installed on the top of the inner box body 33 and arranged vertically downward, an annular electric heating tube 37 is installed on the periphery of the fan blades at the front end of the fan 36, a uniform wind hole plate 38 is installed at the top of the inner box body 33 below the annular electric heating tube 37, and uniform wind holes are evenly opened on the surface of the uniform wind hole plate 38, the light wave heating module includes a plurality of upper carbon fiber light wave tubes 310 installed in the inner box body 33 and below the uniform wind hole plate 38, and a plurality of lower carbon fiber light wave tubes 311 installed at the bottom of the inner box body 33, and the pizza conveying device 2 passes through the left and right sides of the inner box body 33 of the light wave hot air furnace in the horizontal direction and is located between the upper carbon fiber light wave tube 310 and the lower carbon fiber light wave tube 311. In actual operation, it is only necessary to place the pizza to be baked on the pizza conveyor 2, and the pizza conveyor 2 will drive the pizza to be baked from left to right to the inner box 33 of the hot air stove, and the annular electric heating pipe 37 will work to heat the air, and then the heated air will be evenly transported from top to bottom through the uniform air hole plate 38 by the fan 36, ensuring that the hot air in the inner box 33 is evenly distributed, and the upper carbon fiber light wave tube 310 and the lower carbon fiber light wave tube 311 are controlled to work at the same time at the optimal temperature intervention point, so as to quickly heat the top and bottom surfaces of the pizza at the same time. When the pizza is baked, the pizza conveyor 2 will take the baked pizza out of the inner box 33, and the baked pizza can be placed in the mobile shelf box 1 for temporary storage.

[0052] A support and protection frame 26 is installed between the upper carbon fiber light wave tube 310 and the lower carbon fiber light wave tube 311 in the inner box 33 of the hot air furnace. The upper end of the circular transmission chain passes through the upper part of the support and protection frame 26, and the lower end of the circular transmission chain passes through the lower part of the support and protection frame 26. In actual operation, the support and protection frame 26 can ensure that the pizza can be well supported and protected during the baking process.

[0053] The back plate 32 of the outer box 31 is evenly provided with heat dissipation holes, and two heat dissipation fans 34 are installed on the top of the back plate 32 in parallel and spaced apart. One end of the smoke exhaust pipe 35 is installed on the back plate 32, and the other end of the smoke exhaust pipe 35 extends into the inner box 33. In actual operation, the heat dissipation holes and the heat dissipation fans 34 provided on the back plate 32 can be used to quickly dissipate the heat outside the inner box 33, and the smoke generated during the pizza baking process can be discharged to the outside through the smoke exhaust pipe 35. The intelligent control module 39 is installed in the cavity between the inner box 33 and the outer box 31 to realize automatic control of the pizza oven during operation.

[0054] The light wave hot air pizza oven has a simple structure, reasonable design, high intelligence, high heating efficiency, and uniform heat distribution in the oven. In actual operation, it is only necessary to place the pizza to be baked on the pizza conveyor 2, and the pizza conveyor 2 will drive the pizza to be baked from left to right to be transported to the inner box of the light wave hot air oven 3, and the annular electric heating tube 37 works to heat the air, and then the heated air is evenly transported from top to bottom through the uniform air hole plate 38 by the fan 36, to ensure that the hot air in the inner box 33 is evenly distributed, and the upper carbon fiber light wave tube 310 and the lower carbon fiber light wave tube 311 are controlled to work simultaneously at the optimal temperature intervention point, so as to quickly heat the top and bottom surfaces of the pizza at the same time, so that the middle part of the pizza with material can remain soft and glutinous while achieving the effect of crispy crust, thereby improving the quality of pizza baking.

[0055] Embodiment 2: A light wave hot air pizza oven intelligent control system.

[0056] Reference Figures 1 to 5 As shown, an intelligent control system of a light wave hot air pizza oven includes: a light wave heating module, a hot air module, a temperature sensor, a humidity sensor and an intelligent control module installed in the light wave hot air pizza oven, wherein the intelligent control module is electrically connected to the light wave heating module, the hot air module, the temperature sensor and the humidity sensor respectively, the light wave heating module includes an upper carbon fiber light wave tube 310 and a lower carbon fiber light wave tube 311, the hot air module includes a fan 36 and a ring electric heating tube 37, and the intelligent control module operates as follows:

[0057] S1, the system is powered on, the main program starts initialization, and a series of parameters are set;

[0058] S2. According to the set initialization parameters, drive the hot air module to heat the pizza oven, and call the temperature sensor and humidity sensor to collect temperature and humidity. In the actual working process, the system will drive the annular electric heating tube 37 to heat the air, and then use the fan 36 to evenly transport the heated air from top to bottom through the uniform air hole plate 38 to heat the pizza placed in the inner box 33. The purpose of hot air heating is to heat the crust and the middle part of the pizza slowly first to ensure that the pizza is heated evenly, and the crust and the middle part of the pizza can be baked, and then enable light wave rapid heating, using light wave high temperature heating to quickly heat the pizza crust in a short time, so that the pizza crust becomes crispy, and based on the different materials of the middle part of the pizza, it will not quickly become crispy in a short time, and it will still remain soft and sticky. However, when the light wave heating module intervenes is the core problem that the present invention needs to solve.

[0059] S3. Calculate the optimal temperature T1 when the light wave heating module intervenes. In actual operation, hot air heating is slow and has the highest energy consumption, while light wave heating is fast and has low energy consumption. Light wave heating can reach a high temperature of 600℃-800℃ in a few seconds, and then transfer heat to the heated object. This heat transfer method can achieve a thermal efficiency of more than 95%, and efficiently and quickly heat the heated object. For food such as pizza, it is necessary to keep the middle part of the material soft and sticky, and the crust crispy. However, in the actual heating process, if only hot air is used to heat the pizza, it is difficult to achieve the effect of crispy crust and soft and sticky middle part. The main reason is that in the process of long-term heating of the pizza crust by hot air, a large amount of heat is simultaneously transmitted to the middle part of the material, which makes the middle part of the material slowly harden, which will seriously affect the taste of the pizza. Since the crust of the pizza is flour, and the middle part is a mixture of flour, cheese, meat, fruit, cream, etc., the heating temperature and speed are different. Therefore, when the light wave and hot air mixed heating mode is turned on, the hot air heating needs to be turned on first. When the hot air heats the pizza to a certain temperature, the light wave heating is started again, and then the pizza crust is quickly heated in a short time, while minimizing the impact on the middle part with ingredients. This can not only achieve the lowest energy consumption and shorten the pizza heating time, but also ensure the best taste of the pizza after heating. Therefore, how to calculate the optimal temperature T1 when the light wave heating module intervenes is the core problem solved by the present invention.

[0060] In order to solve the above problems, the present invention specifically calculates the optimal temperature T1 when the light wave heating module is involved in the following manner:

[0061] S31. According to Newton's law of cooling, when an object is exposed to hot air, its surface temperature will gradually approach the temperature of the hot air over time. The calculation formula for the change in the surface temperature of the object is as follows:

[0062] T(t)=T 环境 +(T 初始 -T 环境 ) -kt Formula 1

[0063] Where T(t) is the temperature of the material at time t, T 环境 is the temperature of hot air, T 初始 is the initial temperature of the material, k is a positive constant that depends on the properties of the material and the hot air, and t is the heating time;

[0064] S32. A regression equation is established with drying time as an influencing factor. The optimization equation for drying time and process parameters is:

[0065]

[0066] In formula 1, is the drying time for the material surface to rise from temperature T1 to target temperature T2 during light wave heating, min; X1 is the light wave temperature control temperature, ℃; X2 is the drying time per cycle, min; X3 is the temperature difference, i.e. T2-T1, ℃;

[0067] S33. The light wave tube in the light wave heating module converts electrical energy into thermal energy. The electric heat equivalent is derived from the electric power calculation formula:

[0068]

[0069] In formula 2, Q is the heat generated by the resistor when it is powered on, in J, U is the working voltage across the resistor, in V, and Rt is the resistance value of the resistor in the working state, in Ω. is the transit time, in h;

[0070] According to Joule's law, the electric power P required to derive thermoelectricity is calculated according to Formula 4:

[0071]

[0072] S34. Based on the required total electrical power P, the system can accurately calculate the time required for the light wave heating process according to Formula 3 and Formula 4. Then, the temperature difference X3 is calculated in reverse according to formula 2. Since the target temperature T2 is known, the material surface temperature T1 is accurately calculated. This is the best time for light wave heating to intervene. When the system intervenes at the optimal temperature T1 to control the upper and lower carbon fiber light wave tubes to work simultaneously, the top and bottom surfaces of the pizza are quickly heated at the same time, so that the middle part of the pizza can remain soft and glutinous while achieving a crispy effect on the surface, thereby improving the quality of pizza baking.

[0073] S4. When the temperature sensor detects that the pizza is heated to the optimal intervention temperature T1, the PID calculation program is called to control the light wave heating module to intervene, so that the light wave hot air pizza oven quickly reaches the set target temperature T2 and quickly heats the pizza crust.

[0074] The process of calling the PID calculation program to control the intervention of the light wave heating module is as follows:

[0075] S41, determine the fuzzy PID control formula:

[0076]

[0077] Among them, △P is the output value of the PID algorithm result; K P is the proportionality coefficient; e is the deviation; T i is the integration constant; T d is the differential constant; ∞δ

[0078] S42, according to the discrete calculation formula

[0079]

[0080] Wherein, e*(t) is the input signal of the signal sampler. When t=0, the sampler is closed for T seconds, e*(t)=e(t). The smaller the period T is, the more data is obtained and the better the control effect is.

[0081] S43, determine T and T according to formula 6 i 、T d , K and the deviation value e at each moment, the operation value of each time period n is calculated, and the processor calculates the operation value to realize fuzzy PID control.

[0082] During the calculation process, the intelligent control system continuously detects the variable values ​​of the environment, obtains the deviation change rate in real time, and then fuzzily controls the temperature inside the pizza oven accurately to achieve control of the controller parameter values.

[0083] The intelligent control system of this light wave hot air pizza oven is highly intelligent. When using the light wave and hot air mixed heating mode, it can accurately find the best intervention point of light wave heating to achieve high-quality pizza baking. First, the pizza is heated slowly at a low temperature through hot air heating to ensure that the pizza is heated evenly. Then the best intervention point of light wave heating is accurately found, and light wave heating is used to quickly heat the pizza crust, so that the middle part of the pizza with material remains soft and glutinous while achieving the effect of crispy crust, greatly improving the quality of pizza baking, and can effectively reduce energy consumption, realize the best heating strategy for pizza, optimize energy consumption, and reduce pizza baking time. It only takes 4-8 minutes to bake a pizza, which greatly shortens the pizza baking time.

[0084] The above description is only a preferred embodiment of the present invention, but the present invention should not be limited to the contents disclosed in the embodiment and the drawings, so any equivalent or modification completed without departing from the spirit disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. An intelligent control system for a light wave hot air pizza oven, characterized in that include: The light wave heating module, hot air module, temperature sensor, humidity sensor and intelligent control module installed in the light wave hot air pizza oven, the intelligent control module is electrically connected to the light wave heating module, hot air module, temperature sensor and humidity sensor respectively, and the intelligent control module operates as follows: S1, system initialization; S2. According to the set initialization parameters, drive the hot air module to heat the pizza oven, and call the temperature sensor and humidity sensor to collect temperature and humidity; S3, calculating the optimal temperature T1 when the light wave heating module is involved; S4. When the temperature sensor detects that the pizza is heated to the optimal intervention temperature T1, the PID calculation program is called to control the light wave heating module to intervene, so that the light wave hot air pizza oven quickly reaches the set target temperature T2 and quickly heats the pizza crust.

2. The light wave hot air pizza oven intelligent control system according to claim 1, characterized in that: In step S3, the optimal temperature T1 when the light wave heating module is involved is calculated in the following manner: S31. According to Newton's law of cooling, when an object is exposed to hot air, its surface temperature will gradually approach the temperature of the hot air over time. The calculation formula for the change in the surface temperature of the object is as follows: T(t) = T 环境 +(T 初始 -T 环境 )e -kt Equation 1 Where T(t) is the temperature of the material at time t, T 环境 is the temperature of hot air, T 初始 is the initial temperature of the material, k is a positive constant that depends on the properties of the material and the hot air, and t is the heating time; S32. A regression equation is established with drying time as an influencing factor. The optimization equation for drying time and process parameters is: In formula 1, is the drying time for the material surface to rise from temperature T1 to target temperature T2 during light wave heating, min; X1 is the light wave temperature control temperature, ℃; X2 is the drying time per cycle, min; X3 is the temperature difference, i.e. T2-T1, ℃; S33. The light wave tube in the light wave heating module converts electrical energy into thermal energy. The electrothermal equivalent is derived from the electric power calculation formula: In formula 2, Q is the heat generated by the resistor when it is powered on, in J, U is the working voltage across the resistor, in V, and Rt is the resistance value of the resistor in the working state, in Ω. is the transit time, in h; According to Joule's law, the electric power P required to derive thermoelectricity is calculated according to Formula 4: S34. Based on the required total electrical power P, the system can accurately calculate the time required for the light wave heating process according to Formula 3 and Formula 4. Then, the temperature difference X3 is calculated in reverse according to formula 2. Since the target temperature T2 is known, the material surface temperature T1 can be accurately calculated. This is the best time to intervene in light wave heating.

3. The light wave hot air pizza oven intelligent control system according to claim 1, characterized in that: In step S4, the process of calling the PID calculation program to control the light wave heating module to intervene is as follows: S41, determine the fuzzy PID control formula: Among them, △P is the output value of the PID algorithm result; K P is the proportionality coefficient; e is the deviation; T i is the integration constant; T d is the differential constant; ∞δ S42, according to the discrete calculation formula Wherein, e*(t) is the input signal of the signal sampler. When t=0, the sampler is closed for T seconds, e*(t)=e(t). The smaller the period T is, the more data is obtained and the better the control effect is. S43, determine T and T according to formula 6 i , T d , K and the deviation value e at each moment, the operation value of each time period n is calculated, and the processor calculates the operation value to realize fuzzy PID control.

4. A light wave hot air pizza oven, characterized in that include: The light wave hot air pizza oven intelligent control system as described in any one of claims 1-3 also includes a mobile shelf box, a light wave hot air oven is installed on the top of the mobile shelf box, a pizza conveyor device passes through the left and right sides of the light wave hot air oven horizontally, a control box is installed on one side of the light wave hot air oven, and a control panel is installed on the control box.

5. The light wave hot air pizza oven according to claim 4, characterized in that: The light wave hot air furnace includes an outer box body, an inner box body is installed in the outer box body, a light wave heating module, a hot air module, a temperature sensor, and a humidity sensor are all installed in the inner box body, the hot air module includes a fan installed on the top of the inner box body and arranged vertically downward, an annular electric heating tube is installed on the periphery of the fan blades at the front end of the fan, and a uniform wind hole plate is installed on the top of the inner box body below the annular electric heating tube, and uniform wind holes are evenly opened on the surface of the uniform wind hole plate; the light wave heating module includes a plurality of upper carbon fiber light wave tubes installed in the inner box body and below the uniform wind hole plate, and a plurality of lower carbon fiber light wave tubes installed at the bottom of the inner box body, and a pizza conveying device passes through the left and right sides of the inner box of the light wave hot air furnace in the horizontal direction and is located between the upper carbon fiber light wave tube and the lower carbon fiber light wave tube.

6. The light wave hot air pizza oven according to claim 4, characterized in that: The pizza conveying device includes a frame, which is fixedly installed on the top of the mobile shelf box. A driving roller and a passive roller are respectively installed on the left and right ends of the frame. A plurality of chain transmission gears are correspondingly installed on the driving roller and the passive roller. A ring transmission chain is installed between the corresponding chain transmission gears. The conveying motor is installed on one side of the driving roller and connected to the transmission shaft of the driving roller.

7. The light wave hot air pizza oven according to claim 6, characterized in that: A support and protection frame is installed between the upper carbon fiber light wave tube and the lower carbon fiber light wave tube in the inner box of the light wave hot air furnace, the upper end of the annular transmission chain passes above the support and protection frame, and the lower end of the annular transmission chain passes below the support and protection frame.

8. The light wave hot air pizza oven according to claim 4, characterized in that: The back plate of the outer box body is evenly provided with heat dissipation holes, and two parallel and spaced heat dissipation fans are installed on the top of the back plate. One end of the smoke exhaust pipe is installed on the back plate, and the other end of the smoke exhaust pipe extends into the inner box body.

9. The light wave hot air pizza oven according to claim 4, characterized in that: A shelf is arranged in the movable shelf box, and a plurality of universal wheels are arranged at the bottom of the movable shelf box.

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