Temperature control system and temperature control method for electric oven

Abstract

The invention provides an electric oven temperature control system and method, the system comprises an electric oven, the input end of the electric oven is connected with a temperature adjusting module, and the output end of the electric oven is connected with a temperature measuring module. The temperature adjusting module and the temperature measuring module are electrically connected to the control module, and the control module is used for collecting and analyzing the oven temperature of the temperature measuring module and driving the temperature adjusting module to heat or refrigerate the electric oven. The temperature in the electric oven is measured through the temperature measuring module so as to obtain the temperature of the oven in real time, then the temperature of the oven is compared with the set temperature, and the temperature adjusting module is controlled to heat or refrigerate the electric oven. The temperature measuring module is adopted to accurately measure the temperature of the oven, and the control module is adopted to intelligently control the temperature adjusting module, so that the electric oven can intelligently control the temperature of food while monitoring the temperature of the oven in real time, and the situation that the food is burnt due to overheating is avoided. In addition, the electric oven also has a refrigeration function, so that one oven has two purposes, and more use choices are provided for users.

Description

Technical Field

[0001] The invention relates to the technical field of oven control, and in particular to a temperature control system and a temperature control method for an electric oven. Background Art

[0002] With the rapid development of science and technology, ovens have become widely used electrical appliances. The working principle of an oven is to use electricity or gas to heat the heating wire, generate high temperature, and heat the food through hot air.

[0003] Traditional ovens have the following disadvantages: (1) It is difficult to control the time and heating temperature. If the heating time is too long or the heating temperature is too high, the food in the oven may be burnt. (2) The function is single. The existing oven can only heat food. In summer, fruits and drinks need to be cooled down, and other appliances such as refrigerators are needed to cool down fruits and drinks.

[0004] Therefore, there is a need for an electric oven temperature control system that has both heating and cooling functions and can measure the oven temperature in real time. Summary of the invention

[0005] In order to overcome the problems existing in the related art, one of the purposes of the present invention is to provide an electric oven temperature control system, which has both heating and cooling functions and can measure the oven temperature in real time.

[0006] An electric oven temperature control system comprises an electric oven, wherein the input end of the electric oven is connected to a temperature regulating module, and the output end of the electric oven is connected to a temperature measuring module; the temperature regulating module and the temperature measuring module are both electrically connected to a control module, and the control module is used to collect and analyze the oven temperature of the temperature measuring module, and drive the temperature regulating module to heat or cool the electric oven.

[0007] In a preferred technical solution of the present invention, the temperature regulating module includes a heating cavity, and an electric heater is arranged in the heating cavity, and the electric heater is used to heat the electric oven.

[0008] In a preferred technical solution of the present invention, the temperature regulating module further comprises a refrigeration cavity, in which a semiconductor refrigeration sheet is arranged, and the semiconductor refrigeration sheet is used to cool the electric oven.

[0009] In a preferred technical solution of the present invention, a heat insulating layer is provided between the heating chamber and the refrigeration chamber, and the heat insulating layer is used to isolate the heating chamber from the refrigeration chamber so that the heating chamber and the refrigeration chamber do not interfere with each other.

[0010] In a preferred technical solution of the present invention, the heat insulation layer includes a heat reflective film and heat insulating cotton, and the heat reflective film and the heat insulating cotton are alternately arranged.

[0011] In a preferred technical solution of the present invention, a slide rail is provided on one side of the refrigeration chamber, and a baffle is slidably connected to the slide rail; the baffle is used to move along the slide rail to form an air duct opening.

[0012] In a preferred technical solution of the present invention, the temperature regulating module also includes an air inlet grille, which is connected to the outside atmosphere; a cross-flow fan blade is arranged between the air inlet grille and the slide rail, and the cross-flow fan blade is used to send external airflow into the heating chamber or the refrigeration chamber.

[0013] In a preferred technical solution of the present invention, the temperature measurement module is electrically connected to the input end of the AD converter, the output end of the AD converter is electrically connected to the input end of the first photoelectric isolator; the output end of the first photoelectric isolator is electrically connected to the input end of the control module.

[0014] In a preferred technical solution of the present invention, the output end of the control module is electrically connected to the input end of the second photoelectric isolator, the output end of the second photoelectric isolator is electrically connected to the input end of the DA converter, and the output end of the DA converter is electrically connected to the temperature regulation module.

[0015] A second object of the present invention is to provide an electric oven temperature control method, based on any of the above-mentioned electric oven temperature control systems, the method comprising:

[0016] Obtaining the oven temperature measured by the temperature measuring module;

[0017] Determine whether the oven temperature reaches 90% of the set temperature, and if so, control the electric heating to heat at 50% of the set power;

[0018] Determine whether the oven temperature reaches the set temperature, and if so, control the electric heating to stop working.

[0019] In a preferred technical solution of the present invention, after obtaining the oven temperature measured by the temperature measuring module, the method further includes:

[0020] Inputting the oven temperature into an amplifier circuit for signal amplification to obtain an amplified temperature signal;

[0021] Using an AD converter to convert the amplified temperature signal into a temperature electrical signal;

[0022] The temperature electrical signal is input into the control module.

[0023] In a preferred technical solution of the present invention, after determining whether the oven temperature has reached 90% of the set temperature, the method further includes:

[0024] If the oven temperature does not reach 90% of the set temperature, the electric heater is controlled to heat at the set power;

[0025] If the oven temperature reaches 90% of the set temperature, the electric heater is controlled to heat at 50% of the set power.

[0026] The beneficial effects of the present invention are as follows: the present invention provides an electric oven temperature control system, comprising an electric oven, wherein the input end of the electric oven is connected to a temperature regulating module, and the output end of the electric oven is connected to a temperature measuring module; the temperature regulating module and the temperature measuring module are both electrically connected to a control module, and the control module is used to collect and analyze the oven temperature of the temperature measuring module, and drive the temperature regulating module to heat or cool the electric oven. The oven temperature in the electric oven is measured by the temperature measuring module to obtain the oven temperature in real time. Since the temperature measuring module and the temperature regulating module are both electrically connected to the control module, the control module can obtain the oven temperature measured by the temperature measuring module at any time, and then compare the oven temperature with the value of the set temperature. The control module gives a control amount, and controls the temperature regulating module to heat or cool the electric oven. The temperature measuring module is used to accurately measure the oven temperature, and the control module is used to intelligently control the temperature regulating module, so that the electric oven can intelligently control the temperature of food while monitoring the oven temperature in real time, and avoid overheating and burning of food when using the heating function. In addition, the electric oven also has a cooling function, which can cool down the food, realize dual-use in one box, and provide users with more usage options. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the temperature adjustment module of the present invention;

[0028] Figure 2 It is a schematic structural diagram of the heat insulation layer of the present invention;

[0029] Figure 3 It is a composition diagram of the electric oven temperature control system of the present invention;

[0030] Figure 4 It is a flow chart of the temperature control method of an electric oven of the present invention.

[0031] Figure numerals: 1. electric oven; 2. temperature adjustment module; 3. temperature measurement module; 4. control module; 5. heating chamber; 6. electric heating; 7. refrigeration chamber; 8. semiconductor refrigeration plate; 9. thermal insulation layer; 10. heat reflective film; 11. thermal insulation cotton; 12. slide rail; 13. baffle; 14. air duct opening; 15. air inlet grille; 16. crossflow fan blade; 17. AD converter; 18. first photoelectric isolator; 19. second photoelectric isolator; 20. DA converter. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0033] Example 1

[0034] like Figure 3 As shown, this embodiment provides a temperature control system for an electric oven 1, comprising an electric oven 1, wherein the input end of the electric oven 1 is connected to a temperature regulating module 2, and the output end of the electric oven 1 is connected to a temperature measuring module 3; the temperature regulating module 2 and the temperature measuring module 3 are both electrically connected to a control module 4, and the control module 4 is used to collect and analyze the oven temperature of the temperature measuring module 3, and drive the temperature regulating module 2 to heat or cool the electric oven 1.

[0035] The electric oven 1 has both heating and cooling functions. When the electric oven 1 is heating, the electric oven 1 generates heat through the built-in heating element, and transfers the heat to the air and food inside the oven through heat conduction, heat convection and heat radiation. The heat is transferred from the high-temperature area to the low-temperature area until thermal equilibrium is reached. When the electric oven 1 is cooling, the electric oven 1 cools down through the built-in cooling element, and drives the cooling pipe through the fan, so that the cooling airflow flows into the air inside the oven, so that the temperature inside the oven is quickly cooled, thereby achieving the purpose of quickly cooling the food.

[0036] The input end of the electric oven 1 is connected to a temperature regulating module 2, through which the temperature in the oven can be adjusted at any time, including heating or cooling the air and food in the oven. The output end of the electric oven 1 is connected to a temperature measuring module 3, which can measure the temperature in the electric oven 1 in real time, so as to monitor the temperature in the electric oven 1 in real time.

[0037] The control module 4 includes a single-chip microcomputer, which is an integrated circuit chip that integrates the CPU, memory, input / output interface, etc. of a computer on a small chip. Compared with a complete computer system, a single-chip microcomputer has the advantages of lower cost, smaller size, and lower power consumption. The single-chip microcomputer controls the temperature adjustment module 2 and the temperature measurement module 3 through electrical connection, and measures the temperature in the oven in real time through the temperature measurement module 3 to obtain the measured real-time temperature data, and inputs the oven temperature into the single-chip microcomputer. The single-chip microcomputer obtains the real-time temperature data in the oven, and then compares the real-time temperature with the set temperature, and the single-chip microcomputer outputs the control amount to control the temperature adjustment module 2 to heat or cool the electric oven 1.

[0038] The temperature control system of an electric oven 1 of the present embodiment comprises an electric oven 1, wherein the input end of the electric oven 1 is connected to a temperature regulating module 2, and the output end of the electric oven 1 is connected to a temperature measuring module 3; the temperature regulating module 2 and the temperature measuring module 3 are both electrically connected to a control module 4, and the control module 4 is used to collect and analyze the oven temperature of the temperature measuring module 3, and drive the temperature regulating module 2 to heat or cool the electric oven 1. The oven temperature in the electric oven 1 is measured by the temperature measuring module 3 to obtain the oven temperature in real time. Since the temperature measuring module 3 and the temperature regulating module 2 are both electrically connected to the control module 4, the control module 4 can obtain the oven temperature measured by the temperature measuring module 3 at any time, and then compare the oven temperature with the value of the set temperature. The control module 4 gives a control amount to control the temperature regulating module 2 to heat or cool the electric oven 1. The temperature measuring module 3 is used to accurately measure the oven temperature, and the control module 4 is used to intelligently control the temperature regulating module 2, so that the electric oven 1 can intelligently control the temperature of food while monitoring the oven temperature in real time, and avoid overheating and burning of food when using the heating function. In addition, the electric oven 1 also has a refrigeration function, which can cool down food, achieving dual uses in one box and providing users with more usage options.

[0039] Example 2

[0040] like Figure 3 As shown, this embodiment provides a temperature control system for an electric oven 1, comprising an electric oven 1, wherein the input end of the electric oven 1 is connected to a temperature regulating module 2, and the output end of the electric oven 1 is connected to a temperature measuring module 3; the temperature regulating module 2 and the temperature measuring module 3 are both electrically connected to a control module 4, and the control module 4 is used to collect and analyze the oven temperature of the temperature measuring module 3, and drive the temperature regulating module 2 to heat or cool the electric oven 1.

[0041] like Figure 1 As shown, the temperature regulating module 2 includes a heating chamber 5 , in which an electric heater 6 is arranged, and the electric heater 6 is used to heat the electric oven 1 .

[0042] The temperature adjustment module 2 further includes a refrigeration cavity 7 , in which a semiconductor refrigeration sheet 8 is disposed. The semiconductor refrigeration sheet 8 is used to cool the electric oven 1 .

[0043] A heat insulating layer 9 is provided between the heating cavity 5 and the refrigeration cavity 7 , and the heat insulating layer 9 is used to isolate the heating cavity 5 from the refrigeration cavity 7 so that the heating cavity 5 and the refrigeration cavity 7 do not interfere with each other.

[0044] like Figure 2 As shown, the heat insulation layer 9 includes a heat reflective film 10 and heat insulating cotton 11, and the heat reflective film 10 and the heat insulating cotton 11 are alternately arranged.

[0045] The electric heating 6 can be carried out by resistance heating, which uses resistance wire or resistance to generate heat. By installing resistance heating elements, usually metal wires or heating tubes, in the heating chamber 5, when current passes through these resistance elements, they will generate heat. The electric heating 6 can also be carried out by infrared heating, which directly heats the surface of the object by emitting infrared radiation through infrared radiation elements. When the electric heating 6 in the heating chamber 5 is working, the air inside the heating chamber 5 is heated to form hot air, which enters the oven, so that the temperature in the oven gradually increases, so as to achieve the purpose of heating the food in the oven.

[0046] like Figure 1 As shown, a semiconductor refrigeration sheet 8 is arranged in the refrigeration cavity 7. The semiconductor refrigeration sheet 8 is alternately stacked by N-type semiconductor material and P-type semiconductor material, and is connected by a metal connecting sheet to form a plurality of thermocouple pairs. When a direct current passes through these thermocouple pairs, electrons flow from the N-type semiconductor to the P-type semiconductor. In the process of flowing to the P-type semiconductor, the electrons absorb heat, resulting in a decrease in the temperature of the joint. The semiconductor refrigeration sheet 8 can be used to reduce the temperature in the refrigeration cavity 7, and then the refrigeration cavity 7 is driven by a fan to form a refrigeration airflow, which enters the oven, so that the temperature in the oven is gradually reduced to quickly cool the food in the oven, thereby achieving the purpose of rapid refrigeration. Preferably, two semiconductor refrigeration sheets 8 are provided, which are respectively placed in the refrigeration cavities 7 on both sides of the electric oven 1, so that the refrigeration speed is faster, while improving the refrigeration efficiency, avoiding the high cost caused by too many semiconductor refrigeration sheets 8. In addition, temperature adjustment modules 2 are arranged on both sides of the electric oven 1, and the two temperature adjustment modules 2 blow cold air into the electric oven 1 at the same time, which can improve the refrigeration efficiency of the electric oven 1 for food.

[0047] like Figure 2 As shown, the heat insulation layer 9 is formed by alternating layers of heat reflective film 10 and heat insulating cotton 11, and the layered reflection of the heat reflective film 10 and the low thermal conductivity of the heat insulating cotton 11 are utilized to effectively isolate the heating cavity 5 and the refrigeration cavity 7, so that the electric heater 6 in the heating cavity 5 is not affected by the refrigeration cavity 7 during heating, and the heat can directly enter the oven through the heating cavity 5 better, thereby reducing the heat loss during the operation of the electric heater 6.

[0048] In the present embodiment, a temperature control system for an electric oven 1 is provided, wherein the temperature adjustment module 2 includes a heating chamber 5, wherein an electric heater 6 is provided in the heating chamber 5, and the electric heater 6 is used to heat the electric oven 1. The temperature adjustment module 2 also includes a refrigeration chamber 7, wherein a semiconductor refrigeration sheet 8 is provided in the refrigeration chamber 7, and the semiconductor refrigeration sheet 8 is used to refrigerate the electric oven 1. An insulation layer 9 is provided between the heating chamber 5 and the refrigeration chamber 7, and the insulation layer 9 is used to isolate the heating chamber 5 from the refrigeration chamber 7, so that the heating chamber 5 and the refrigeration chamber 7 do not interfere with each other. The insulation layer 9 includes a heat reflection film 10 and insulation cotton 11, and the heat reflection film 10 and the insulation cotton 11 are alternately provided. The insulation layer 9 is formed by alternately providing the heat reflection film 10 and the insulation cotton 11, and the heating chamber 5 and the refrigeration chamber 7 are isolated by using the insulation layer 9, so that the heat generated by the electric heater 6 in the heating chamber 5 and the refrigeration airflow generated by the semiconductor refrigeration sheet 8 in the refrigeration chamber 7 are effectively isolated, which not only reduces energy loss but also improves energy efficiency. At the same time, the semiconductor refrigeration sheet 8 has the advantages of no noise, no vibration, no pollution, etc., and can achieve more accurate temperature control of the electric oven 1.

[0049] Example 3

[0050] like Figure 3 As shown, this embodiment provides a temperature control system for an electric oven 1, comprising an electric oven 1, wherein the input end of the electric oven 1 is connected to a temperature regulating module 2, and the output end of the electric oven 1 is connected to a temperature measuring module 3; the temperature regulating module 2 and the temperature measuring module 3 are both electrically connected to a control module 4, and the control module 4 is used to collect and analyze the oven temperature of the temperature measuring module 3, and drive the temperature regulating module 2 to heat or cool the electric oven 1.

[0051] like Figure 1 As shown, the temperature regulating module 2 includes a heating chamber 5 , in which an electric heater 6 is arranged, and the electric heater 6 is used to heat the electric oven 1 .

[0052] The temperature adjustment module 2 further includes a refrigeration cavity 7 , in which a semiconductor refrigeration sheet 8 is disposed. The semiconductor refrigeration sheet 8 is used to cool the electric oven 1 .

[0053] A heat insulating layer 9 is provided between the heating cavity 5 and the refrigeration cavity 7 , and the heat insulating layer 9 is used to isolate the heating cavity 5 from the refrigeration cavity 7 so that the heating cavity 5 and the refrigeration cavity 7 do not interfere with each other.

[0054] The heating cavity 5 and the refrigeration cavity 7 are two independent cavities, and the heating cavity 5 and the refrigeration cavity 7 are arranged adjacent to each other. The temperature measuring module 3 measures the oven temperature inside the electric oven 1, and then sends the oven temperature to the control module 4. The control module 4 compares the oven temperature with the set temperature. If the oven temperature is greater than the set temperature, the semiconductor refrigeration sheet 8 in the refrigeration cavity 7 is started to cool the food in the electric oven 1; if the oven temperature is less than the set temperature, the electric heater 6 in the heating cavity 5 is started to heat the food in the electric oven 1.

[0055] The heat insulation layer 9 is provided. When the electric heater 6 in the heating chamber 5 is working, the heat generated by the electric heater 6 will not be transferred to the refrigeration chamber 7; when the semiconductor refrigeration sheet 8 in the refrigeration chamber 7 is working, the cold energy generated by the semiconductor refrigeration sheet 8 will not be transferred to the heating chamber 5. The heat conductivity coefficient of the heat insulation layer 9 in this embodiment is 0.02-0.04W·cm -1 ·K -1 Between, can better insulate heat.

[0056] A slide rail 12 is disposed on one side of the refrigeration chamber 7 , and a baffle 13 is slidably connected to the slide rail 12 ; the baffle 13 is used to move along the slide rail 12 to form an air duct opening 14 .

[0057] The temperature adjustment module 2 also includes an air inlet grille 15, which is connected to the outside atmosphere; a cross-flow fan blade 16 is provided between the air inlet grille 15 and the slide rail 12, and the cross-flow fan blade 16 is used to send external airflow into the heating chamber 5 or the refrigeration chamber 7.

[0058] The baffle 13 slides along the slide rail 12. When the baffle 13 slides to one side of the heating chamber 5, the air inlet grille 15 is isolated from the heating chamber 5, the air inlet grille 15 is connected to the refrigeration chamber 7, and an air duct opening 14 is formed on one side of the refrigeration chamber 7; when the baffle 13 slides to one side of the refrigeration chamber 7, the air inlet grille 15 is isolated from the refrigeration chamber 7, the air inlet grille 15 is connected to the heating chamber 5, and an air duct opening 14 is formed on one side of the heating chamber 5.

[0059] The crossflow blades 16 rotate, forming a negative pressure in the space where the crossflow blades 16 are located, and the outside air flows into the space where the crossflow blades 16 are located from the air inlet grille 15, and then flows into the heating chamber 5 or the refrigeration chamber 7 through the air duct opening 14. If the electric heater 6 in the heating chamber 5 is in working state, the electric heater 6 heats the airflow in the heating chamber 5, so that the airflow temperature increases, and the heated airflow flows into the electric oven 1 to heat the food. If the semiconductor refrigeration sheet 8 in the refrigeration chamber 7 is in working state, the semiconductor refrigeration sheet 8 cools the airflow in the refrigeration chamber 7, so that the airflow temperature decreases, and the cooled airflow flows into the electric oven 1 to cool the food.

[0060] The cross flow fan blades 16 can accelerate the inflow of gas from the outside atmosphere, and the formed airflow flows through the heating chamber 5 to increase the temperature, or flows through the cooling chamber 7 to cool down. The faster the rotation speed of the cross flow fan blades 16, the faster the flow rate of the airflow. By controlling the rotation speed of the cross flow fan blades 16 within a certain range, the airflow can be fully heated or cooled, thereby ensuring that the heating or cooling efficiency of the food in the electric oven 1 is high.

[0061] In this embodiment, a heat insulating layer 9 is provided between the heating chamber 5 and the refrigeration chamber 7, and the heat insulating layer 9 is used to isolate the heating chamber 5 from the refrigeration chamber 7 so that the heating chamber 5 and the refrigeration chamber 7 do not interfere with each other. A slide rail 12 is provided on one side of the refrigeration chamber 7, and a baffle 13 is slidably connected to the slide rail 12; the baffle 13 is used to move along the slide rail 12 to form an air duct opening 14. The temperature adjustment module 2 also includes an air inlet grille 15, and the air inlet grille 15 is connected to the outside atmosphere; a cross flow fan blade 16 is provided between the air inlet grille 15 and the slide rail 12, and the cross flow fan blade 16 is used to send external airflow into the heating chamber 5 or the refrigeration chamber 7. The baffle 13 slides along the slide rail 12. When the baffle 13 slides to one side of the heating chamber 5, the air inlet grille 15 is isolated from the heating chamber 5, the air inlet grille 15 is connected to the refrigeration chamber 7, and a duct opening 14 is formed on one side of the refrigeration chamber 7; when the baffle 13 slides to one side of the refrigeration chamber 7, the air inlet grille 15 is isolated from the refrigeration chamber 7, the air inlet grille 15 is connected to the heating chamber 5, and a duct opening 14 is formed on one side of the heating chamber 5. The crossflow blades 16 rotate to form a negative pressure in the space where the crossflow blades 16 are located. External air flows from the air inlet grille 15 into the space where the crossflow blades 16 are located, and then flows into the heating chamber 5 through the duct opening 14 to heat the food in the electric oven 1, or flows into the refrigeration chamber 7 through the duct opening 14 to cool the food in the electric oven 1.

[0062] Example 4

[0063] like Figure 3 As shown, this embodiment provides a temperature control system for an electric oven 1, comprising an electric oven 1, wherein the input end of the electric oven 1 is connected to a temperature regulating module 2, and the output end of the electric oven 1 is connected to a temperature measuring module 3; the temperature regulating module 2 and the temperature measuring module 3 are both electrically connected to a control module 4, and the control module 4 is used to collect and analyze the oven temperature of the temperature measuring module 3, and drive the temperature regulating module 2 to heat or cool the electric oven 1.

[0064] The temperature measurement module 3 is electrically connected to the input end of the AD converter 17 , and the output end of the AD converter 17 is electrically connected to the input end of the first photoelectric isolator 18 ; the output end of the first photoelectric isolator 18 is electrically connected to the input end of the control module 4 .

[0065] The output end of the control module 4 is electrically connected to the input end of the second photoelectric isolator 19 , the output end of the second photoelectric isolator 19 is electrically connected to the input end of the DA converter 20 , and the output end of the DA converter 20 is electrically connected to the temperature adjustment module 2 .

[0066] In this embodiment, the temperature measuring module 3 measures the oven temperature in the electric oven 1, and the oven temperature is an analog signal. The AD converter 17 converts the oven temperature from the analog signal to a digital signal, and sends the digital signal to the input end of the control module 4. The control module 4 adopts a single-chip microcomputer, which is an integrated circuit chip. It is a small and complete microcomputer system that integrates a central processing unit CPU with data processing capability, a random access memory RAM, a read-only memory ROM, a variety of I / O ports and interrupt systems, a timer / counter and other functions on a silicon chip using ultra-large-scale integrated circuit technology.

[0067] The photoelectric isolator is an electric-optical-electrical conversion device that uses light as a medium to transmit electrical signals. The photoelectric isolator consists of two parts: a light source and a light receiver. The light source and the light receiver are assembled in a closed housing and isolated from each other by a transparent insulator. The pin of the light source is the input end, and the pin of the light receiver is the output end. The common light source is a light emitting diode, and the light receiver is a photosensitive diode, a photosensitive transistor, etc. Since the input and output ends of the photoelectric isolator are isolated from each other, the electrical signal transmission has the characteristics of unidirectionality, so it has good electrical insulation and anti-interference capabilities.

[0068] The output end of the AD converter 17 sends the digital signal in the form of an electrical signal to the first photoelectric isolator 18. The first photoelectric isolator 18 can isolate external electrical signal interference to ensure the authenticity of the oven temperature received by the input end of the control module 4. The digital signal is transmitted to the input end of the control module 4 through the first photoelectric isolator 18. The control module 4 compares the oven temperature with the set temperature. If the oven temperature is lower than the set temperature, a heating instruction is generated; if the oven temperature is higher than the set temperature, a cooling instruction is generated. The output end of the control module 4 sends the heating instruction or the cooling instruction to the second photoelectric isolator 19, and the heating instruction or the cooling instruction is transmitted to the input end of the DA converter 20 through the second photoelectric isolator 19.

[0069] The DA converter 20 converts the heating instruction or cooling instruction from a digital signal into an analog signal, and sends the analog signal to the temperature adjustment module 2, and the temperature adjustment module 2 heats or cools the electric oven 1. During the operation of the electric heater 6 or the semiconductor cooling sheet 8 of the temperature adjustment module 2, the temperature of the food in the electric oven 1 changes, and the oven temperature collected by the temperature measurement module 3 changes. The control module 4 receives the updated oven temperature, compares the received updated oven temperature with the set temperature, and executes the updated heating instruction or the updated cooling instruction.

[0070] Preferably, a signal amplification circuit is provided between the temperature measurement module 3 and the AD converter 17 , and the signal amplification circuit is used to amplify the analog signal measured by the temperature measurement module 3 .

[0071] The temperature measurement module 3 of this embodiment is electrically connected to the input end of the AD converter 17, and the output end of the AD converter 17 is electrically connected to the input end of the first photoelectric isolator 18; the output end of the first photoelectric isolator 18 is electrically connected to the input end of the control module 4. The output end of the control module 4 is electrically connected to the input end of the second photoelectric isolator 19, and the output end of the second photoelectric isolator 19 is electrically connected to the input end of the DA converter 20, and the output end of the DA converter 20 is electrically connected to the temperature adjustment module 2. The first photoelectric isolator 18 is provided to prevent the oven temperature input by the temperature measurement module 3 to the control module 4 from being interfered by the outside world. The second photoelectric isolator 19 is provided to prevent the heating instruction or cooling instruction sent by the control module 4 to the temperature adjustment module 2 from being interfered by the outside world.

[0072] Example 5

[0073] like Figure 4 As shown, this embodiment provides an electric oven temperature control method, based on the electric oven temperature control system described in any one of Embodiments 1 to 4, the method comprises:

[0074] S1: Obtain the oven temperature measured by the temperature measurement module.

[0075] S2: Determine whether the oven temperature reaches 90% of the set temperature. If so, control the electric heating to heat at 50% of the set power.

[0076] S3: Determine whether the oven temperature reaches the set temperature, and if so, control the electric heating to stop working.

[0077] Figure 3It is a composition diagram of the electric oven temperature control system of the present invention. Starting from the initial state, the electric heater 6 heats with the set power, and the oven temperature of the temperature measuring module 3 is measured at a fixed interval, such as 1 second. If the oven temperature reaches 90% of the set temperature, the heater heats the electric oven 1 with 50% of the set power. When the oven temperature reaches the set temperature, the electric heater 6 stops working, so that the oven temperature changes from the set temperature to 90% of the set temperature, and then the electric heater 6 is started, and the electric heater 6 heats the electric oven 1 with 50% of the set power. Repeat the above process, so that the oven temperature changes between 90% of the set temperature and the set temperature. In this process, the electric heater 6 works periodically. When the electric heater 6 works, the electric oven 1 is heated with 50% of the set power. When the electric heater 6 stops working, it will not consume electric energy, so that the electric oven 1 heats the food at a higher temperature, and can save electric energy at the same time. Since the temperature measuring module 3 is provided, the temperature measuring module 3 sends the current oven temperature to the control module 4, which can prevent the oven temperature from being too high and causing the food to burn.

[0078] After obtaining the oven temperature measured by the temperature measuring module, the method further includes:

[0079] S21': inputting the oven temperature into an amplifier circuit for signal amplification to obtain an amplified temperature signal.

[0080] S22': using an AD converter to convert the amplified temperature signal into a temperature electrical signal.

[0081] S23': Input the temperature electrical signal into the control module.

[0082] Preferably, a signal amplification circuit is provided between the temperature measurement module 3 and the AD converter 17, and the signal amplification circuit is used to amplify the analog signal measured by the temperature measurement module 3. After amplification, the temperature signal is an analog signal, and the temperature electrical signal is a digital signal.

[0083] After determining whether the oven temperature reaches 90% of the set temperature, the method further includes:

[0084] S31': If the oven temperature does not reach 90% of the set temperature, the electric heater is controlled to perform heating at the set power.

[0085] S32': If the oven temperature reaches 90% of the set temperature, the electric heating is controlled to heat at 50% of the set power.

[0086] When the oven temperature is lower than 90% of the set temperature, the electric heater 6 heats the electric oven 1 at the set power to quickly increase the temperature inside the electric oven 1; when the oven temperature is higher than 90% of the set temperature, the electric heater 6 heats the electric oven 1 at 50% of the set power to save electricity.

[0087] After obtaining the oven temperature measured by the temperature measuring module 3 in this embodiment, the method further includes inputting the oven temperature into an amplifier circuit for signal amplification to obtain an amplified temperature signal. The amplified temperature signal is converted into a temperature electrical signal by an AD converter 17, and the temperature electrical signal is input into the control module 4. After determining whether the oven temperature has reached 90% of the set temperature, the method further includes controlling the electric heater 6 to heat at a set power if the oven temperature has not reached 90% of the set temperature, so as to quickly increase the temperature in the electric oven 1. If the oven temperature reaches 90% of the set temperature, the electric heater 6 is controlled to heat at 50% of the set power to save electric energy.

[0088] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a restriction. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in the subsequent accompanying drawings.

[0089] It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would then be positioned "below" or "below" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used herein should be interpreted accordingly.

[0090] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric oven temperature control system, characterized in that: It includes an electric oven, the input end of the electric oven is connected to a temperature regulating module, and the output end of the electric oven is connected to a temperature measuring module; the temperature regulating module and the temperature measuring module are both electrically connected to a control module, and the control module is used to collect and analyze the oven temperature of the temperature measuring module, and drive the temperature regulating module to heat or cool the electric oven.

2. The electric oven temperature control system according to claim 1, characterized in that: The temperature regulating module comprises a heating cavity, in which an electric heater is arranged, and the electric heater is used to heat the electric oven.

3. The electric oven temperature control system according to claim 2, characterized in that: The temperature regulating module further comprises a refrigeration cavity, in which a semiconductor refrigeration sheet is arranged, and the semiconductor refrigeration sheet is used to cool the electric oven.

4. The electric oven temperature control system according to claim 3, characterized in that: A heat insulation layer is arranged between the heating cavity and the refrigeration cavity, and the heat insulation layer is used to isolate the heating cavity and the refrigeration cavity so that the heating cavity and the refrigeration cavity do not interfere with each other.

5. The electric oven temperature control system according to claim 4, characterized in that: The heat-insulating layer comprises a heat-reflecting film and heat-insulating cotton, and the heat-reflecting film and the heat-insulating cotton are arranged alternately.

6. The electric oven temperature control system according to claim 4, characterized in that: A slide rail is provided on one side of the refrigeration chamber, and a baffle is slidably connected to the slide rail; the baffle is used to move along the slide rail to form an air duct opening.

7. The electric oven temperature control system according to claim 6, characterized in that: The temperature regulating module also includes an air inlet grille, which is connected to the outside atmosphere; a cross-flow fan blade is arranged between the air inlet grille and the slide rail, and the cross-flow fan blade is used to send external airflow into the heating chamber or the refrigeration chamber.

8. The electric oven temperature control system according to claim 1, characterized in that: The temperature measurement module is electrically connected to the input end of the AD converter, the output end of the AD converter is electrically connected to the input end of the first photoelectric isolator; the output end of the first photoelectric isolator is electrically connected to the input end of the control module.

9. The electric oven temperature control system according to claim 8, characterized in that: The output end of the control module is electrically connected to the input end of the second photoelectric isolator, the output end of the second photoelectric isolator is electrically connected to the input end of the DA converter, and the output end of the DA converter is electrically connected to the temperature adjustment module.

10. A method for controlling the temperature of an electric oven, characterized in that: Based on the electric oven temperature control system according to any one of claims 1 to 9, the method comprises: Obtaining the oven temperature measured by the temperature measuring module; Determine whether the oven temperature reaches 90% of the set temperature, and if so, control the electric heating to heat at 50% of the set power; Determine whether the oven temperature reaches the set temperature, and if so, control the electric heating to stop working.

11. The electric oven temperature control method according to claim 10, characterized in that: After obtaining the oven temperature measured by the temperature measuring module, the method further includes: Inputting the oven temperature into an amplifier circuit for signal amplification to obtain an amplified temperature signal; Using an AD converter to convert the amplified temperature signal into a temperature electrical signal; The temperature electrical signal is input into the control module.

12. The electric oven temperature control method according to claim 10, characterized in that: After determining whether the oven temperature reaches 90% of the set temperature, the method further includes: If the oven temperature does not reach 90% of the set temperature, the electric heater is controlled to heat at the set power; If the oven temperature reaches 90% of the set temperature, the electric heater is controlled to heat at 50% of the set power.

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