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CN-121970859-A - Control method of superheated steam air fryer

CN121970859ACN 121970859 ACN121970859 ACN 121970859ACN-121970859-A

Abstract

The invention relates to a control method of a superheated steam air fryer, which aims at solving the technical problems that the existing similar products are difficult to accurately control the non-enzymatic browning temperature of food materials through the control of a superheated evaporator in the superheated steam cooking process and avoid losing the steamed flavor due to non-enzymatic browning. The control method is characterized by comprising a heating stage, a duty ratio temperature control stage and an overtemperature stage, wherein when water is not fed into the load in the heating stage, the temperature of an evaporator NTC in a cavity is less than or equal to T1, the temperature of an evaporator heating pipe is 5/5, the temperature of a water pump is 0/1.6, the temperature of a mosquito-repellent incense tube is 3/30, the speed of a motor is low, when water is fed into the load in the beginning of the heating stage, the temperature of the evaporator NTC in the cavity is less than or equal to T1 and less than or equal to T2, the temperature of the evaporator heating pipe is 5/5, the temperature of a water pump is N1/1.6, the temperature of a mosquito-repellent incense tube is 3/30, the speed of the motor is low, the duty ratio temperature control stage is used for water to be fed periodically, the target temperature of the evaporator NTC is T3+/-5 ℃, the temperature of the mosquito-repellent incense tube is 1/30, and the speed of the motor is low.

Inventors

  • YE QIANCHAO
  • WENG JIANFENG
  • LOU HONGXIAN

Assignees

  • 浙江比依电器股份有限公司

Dates

Publication Date
20260505
Application Date
20260312

Claims (9)

  1. 1. The control method of the superheated steam air fryer comprises an integrated superheated evaporator (1), a water pump (2), a motor (7), a mosquito-repellent incense tube (10), stirring blades and a shell, wherein an evaporator NTC (4) is arranged in a cavity formed by a metal heat insulation layer at the mosquito-repellent incense tube and a fryer component in a hardware lining in a lower machine body, the evaporator NTC is an NTC temperature sensor, an integrally formed evaporator heating tube (101) and an evaporator steam tube (102) are arranged in an aluminum block of the integrated superheated evaporator, the evaporator heating tube is arranged in the evaporator steam tube which is bent in a waist shape in the middle and is overlapped and wound, water in the evaporator steam tube is changed into superheated steam at 300 ℃ through the integrated superheated evaporator, two ends of the evaporator steam tube of the integrated superheated evaporator are respectively connected with a water inlet and a steam tube (6) of an aluminum block, two ends of the evaporator heating tube of the integrated superheated evaporator are simultaneously extended out of one side of the aluminum block, at least one end of the aluminum block is provided with an outside diameter temperature controller (5) of the aluminum block, and the other end of the evaporator steam tube is provided with a temperature controller of the other end of the evaporator steam tube; the mosquito-repellent incense tube is a heating tube, a stirring fan blade (11) is arranged in a groove of a metal heat-insulating layer above the mosquito-repellent incense tube, the stirring fan blade is connected with a motor shaft of a motor (7) extending into the metal heat-insulating layer, the motor is arranged in a motor groove of a plastic heat-insulating layer (8) in a machine head at the top of the metal heat-insulating layer, and the water inlet pipe sequentially passes through a water pump, the device is characterized in that the switch of the evaporator heating pipe (101) of the integrated overheat evaporator (1) takes 5 seconds as a period, and the evaporator heating pipe control of the integrated overheat evaporator is controlled according to the following formula; Formula a In the formula a, k is a sampling sequence number, k=0, 1,2, & gt, u k is a computer output value of a kth sampling time, e k is a deviation value input by the kth sampling time, e k-1 is a deviation value input by the kth-1 sampling time, ki is an integral coefficient, ki=k p ×T/Ti, kd is a differential coefficient, kd=k p ×Td/T, and the formula automatically calculates the duty ratio of an evaporator heating pipe of the integrated overheat evaporator to keep the integrated overheat evaporator at a constant temperature; and the water pump (2) is used for controlling water inflow: Equation b In the formula b, t is time in seconds, 1.6 is water inlet period of 1.6 seconds, N1, N2, N3 and N4 are water inlet time in the period, N4 is greater than N3 and N2 is greater than N1, mod is a remainder function, and the function is a step function.
  2. 2. The control method of the superheated steam air fryer according to claim 1, wherein the control method comprises a heating stage and a duty ratio temperature control stage, and an overtemperature stage, the heating stage comprises no water inlet and no water inlet, when the load is in the heating stage, the evaporator NTC (4) in the cavity is T≤T1, the evaporator heating pipe is 5/5, the water pump (2) is 0/1.6, the mosquito-repellent incense pipe (10) is 3/30, the motor (7) is low speed, when the load is in the heating stage, the evaporator NTC in the cavity is T1< T≤T2, the evaporator heating pipe is 5/5, the water pump is N1/1.6, the mosquito-repellent incense pipe is 3/30, the motor is low speed, the duty ratio temperature control stage periodically inputs water, the target temperature control temperature of the evaporator NTC is T3 + -5 ℃, the evaporator heating pipe is the formula a, the water pump is 1/30, the motor is low speed, the NTC in the cavity is T≤T4, the evaporator T4 in the cavity is in the off state, the water pump is in the off state of 1/6.
  3. 3. The control method of the superheated steam air fryer according to claim 1, wherein the middle of the evaporator steam pipe (102) of the integrated superheated evaporator (1) is bent in a waist shape, the pipe distance at the middle pipe which is wound in a superposition manner is controlled to be more than 2mm, an evaporator heating pipe (101) which is integrally formed with the evaporator steam pipe through an aluminum block is arranged in a waist-shaped hole at the center of the middle pipe, and water in the evaporator steam pipe is heated into superheated steam of 100 ℃ through the evaporator heating pipe, and then is heated into superheated steam of 300 ℃ for the second time.
  4. 4. The control method of the superheated steam air fryer according to claim 3, wherein the connecting heads at two ends of an evaporator heating pipe (101) of the integrated superheated evaporator (1) and water inlets and steam outlets at two ends of an evaporator steam pipe (102) are staggered to extend out of an aluminum block, the heating part of the evaporator heating pipe which is in an annular or waist-shaped bending section in the evaporator steam pipe is a heating part, the non-heating part of the evaporator heating pipe which is in the extending section of the aluminum block after the evaporator steam pipe is bent, the evaporator steam pipe at one side of the aluminum block, which is close to the water inlets, is the highest energy part, and the symmetrical other side of the connecting heads at two ends of the evaporator heating pipe is a temperature gradually-rising part.
  5. 5. The control method of the superheated steam air fryer according to claim 4, wherein the evaporator steam pipe (102) of the integrated superheated evaporator (1) is provided with another evaporator NTC (4) on the outer diameter side of the aluminum block on the water inlet side, the NTC temperature sensor is arranged near the highest energy part of the evaporator steam pipe and is not more than 5mm away from the outer diameter of the aluminum block on the side, and the distance between the evaporator NTC at one end of the steam port of the evaporator steam pipe and the outer diameter of the aluminum block on the side is 15-20mm.
  6. 6. The control method of the superheated steam air fryer according to claim 1, wherein the water inlet and the steam outlet at both ends of the evaporator steam pipe (102) of the integrated superheated evaporator (1) are respectively extended outwards along the winding direction and in a dislocation manner with the unheated part of the evaporator heating pipe (101) extending out of the aluminum block, or respectively tilted at 90 degrees to the outer sides of the openings at both sides and are bent and extended in a dislocation manner with the unheated part of the heating pipe extending out of the aluminum block.
  7. 7. The control method of the superheated steam air fryer according to claim 1, wherein the two sides of the outer diameter of the aluminum block of the integrated superheated evaporator (1) are respectively provided with regular or irregular low-thickness wrapping grooves which are symmetrically arranged at two sides lower than the plane, and two temperature controllers (5) are respectively arranged at the positions of the low-thickness wrapping grooves or the outer side planes of the positions of the low-thickness wrapping grooves.
  8. 8. The control method of the superheated steam air fryer according to claim 1, wherein a cross-flow fan blade (12) is arranged in a plastic heat insulation layer (8) at the top of a metal heat insulation layer above the stirring fan blade (11), a motor shaft of the motor (7) is simultaneously connected with the stirring fan blade and the cross-flow fan blade, and a worm wheel channel at one side of the plastic heat insulation layer is connected with an exhaust hood of the shell.
  9. 9. A control method of a superheated steam air fryer according to claim 1, characterised in that the evaporator NTC (4) is arranged on the side of the metal insulating layer inside the recess.

Description

Control method of superheated steam air fryer Technical Field The invention relates to a steam air fryer, in particular to a control method of a superheated steam air fryer. Background The air fryer is a novel household appliance for frying food by utilizing a high-speed air circulation technology, and compared with the traditional electric fryer, the food made of the novel household appliance can reduce 80% of grease, is easy to clean in daily use, is safe and economical, and is favored by people. The existing air fryers combine the steam function, namely the steam air fryers, are household appliances combined with the air fryers, have the functions of the air fryers and the steam oven, but have higher steam tightness requirements, and have the core technology that parts such as a water tank, a water pump, a steam generator, a spray head and the like are added on the basis of the air fryers. The steam generator is applied to the air fryer industry in the following conditions of 1 and industry current situation, in recent years, with the higher pursuit of consumers on cooking taste and healthy diet, the prior market of the steam air fryer is increased from 1.38% in 2022 to 14.38% in 2023, the 2024 is further broken through to 51.33%, the first quarter in 2025 is up to 63.44%, 2 and industry technology is provided, research on how the flow channel steam generator accurately controls the temperature and steam quantity of the superheated steam to exert the greatest advantage of the steam generator in the industry still belongs to the blank field, and 3, steam cooking is performed, and the superheated steam cooking starts to slowly generate non-enzymatic browning for food materials at 110 ℃ and generates a severe Maillard reaction at 140-160 ℃. The above steam generator or simply referred to as evaporator has the advantages of high temperature, fast heat transfer, high dryness, etc. of the superheated steam of the steam generator, but the steam generator also easily boils and evaporates the water on the surface of the food material, and the water is reduced on the surface of the food material. Therefore, the advantage of the superheated steam is utilized when the superheated steam is used, the phenomenon that the food material loses the steaming flavor due to non-enzymatic browning is avoided, and the requirements on temperature control are high. The prior structure design and temperature control method of the steam air fryer are disclosed in Chinese patent literature, such as application number 202411334071.5 and application publication date 2024.11.26, the name of the invention is a cooking utensil superheated steam system and a temperature control method thereof, but in the temperature control method of the product and the like, the control period of a water pump is 1 second, the control speed of the water pump is higher, the water pump is lack of the method that the first 16 units of time operate at the duty ratio of N2/1.6 and the second 16 units of time operate at the duty ratio of N3/1.6 within 32 units of time per period. Disclosure of Invention In order to overcome the defects, the invention aims to provide the overheated steam air fryer and the control method thereof for solving the technical problems that the temperature and the steam quantity of overheated steam of a heating pipe in an overheated evaporator are difficult to accurately control in the existing similar cooking appliances, and the non-enzymatic browning temperature of food is difficult to accurately control in the overheat steam cooking, so that the phenomenon that the food loses the steamed flavor due to the non-enzymatic browning is avoided. The aim is achieved by the following technical scheme. A control method of a superheated steam air fryer comprises an integrated superheated steam evaporator, a water pump, a motor, mosquito-repellent incense pipes, stirring blades and a shell, wherein an evaporator NTC is arranged in a cavity formed by a metal heat insulation layer at the mosquito-repellent incense pipes and a fryer component in a lower machine body inner liner, the evaporator NTC is an NTC temperature sensor, an integrally formed evaporator heating pipe and an evaporator steam pipe are arranged in an aluminum block of the integrated superheated steam evaporator, the evaporator heating pipe is arranged in an evaporator steam pipe which is bent in a waist shape in the middle and overlapped and wound, water in the evaporator steam pipe is changed into 300 ℃ superheated steam through the integrated superheated steam evaporator, two ends of the evaporator steam pipe of the integrated superheated steam evaporator are respectively connected with a water inlet pipe and the steam pipe of the aluminum block through the integrated superheated steam evaporator, two ends of the evaporator heating pipe of the integrated superheated steam pipe are simultaneously extended out of one side of the aluminum block, at least one temperature controlle