CN114451790A - Microwave oven, oven and air fryer three-in-one device and device cavity temperature control method - Google Patents
Microwave oven, oven and air fryer three-in-one device and device cavity temperature control method Download PDFInfo
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- CN114451790A CN114451790A CN202210256650.7A CN202210256650A CN114451790A CN 114451790 A CN114451790 A CN 114451790A CN 202210256650 A CN202210256650 A CN 202210256650A CN 114451790 A CN114451790 A CN 114451790A
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- 238000010438 heat treatment Methods 0.000 claims abstract description 74
- 230000001276 controlling effect Effects 0.000 claims abstract description 15
- 230000001105 regulatory effect Effects 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims description 13
- 230000033228 biological regulation Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 7
- 230000000737 periodic effect Effects 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- 230000006870 function Effects 0.000 description 7
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/06—Roasters; Grills; Sandwich grills
- A47J37/0623—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/06—Roasters; Grills; Sandwich grills
- A47J37/0623—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity
- A47J37/0664—Accessories
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/02—Stoves or ranges heated by electric energy using microwaves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/06—Arrangement or mounting of electric heating elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/08—Arrangement or mounting of control or safety devices
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- General Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Cookers (AREA)
- Electric Ovens (AREA)
Abstract
The invention is suitable for the technical field of temperature control, and provides a microwave oven, oven and air fryer three-in-one device and a device cavity temperature control method, wherein the device cavity temperature control method comprises the following steps: regulating and controlling a temperature overshoot stage, starting a heating pipe and a heating fan, and stopping heating when the temperature detected by a temperature sensor reaches a temperature set value Trset and is maintained for 2 s; regulating and controlling the temperature adjusting stage, heating to adjust the temperature when the temperature Tr detected by the temperature sensor is reduced to Trset-delta1, and finishing the current stage for 1s when the temperature Tr detected by the temperature sensor is increased to Trset-delta 2; the method comprises the steps of regulating and controlling a self-regulation stage, carrying out work and stop of the heating tube according to the on-off duty ratio of the heating tube, and regulating the on-off duty ratio of the heating tube when the temperature detected by the temperature sensor is deviated from a temperature set value.
Description
Technical Field
The invention relates to the technical field of temperature control, in particular to a microwave oven, oven and air fryer three-in-one device and a device cavity temperature control method.
Background
The electric oven usually utilizes the heat that electric heater produced to cook food in the culinary art cavity as the heat source, and the control of electric oven to the temperature range in the culinary art cavity is accomplished through the break-make of control heating pipe at present, still needs to match radiator fan to use in addition, and the fan rotational speed is invariable among the current heat abstractor, and the higher rotational speed can cause food moisture to lose more and influence food culinary art quality and taste. Therefore, it is desirable to provide a three-in-one device for an air fryer of a microwave oven and a method for controlling the temperature of the cavity of the device, which are intended to solve the above problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a microwave oven, oven and air fryer three-in-one device and a device cavity temperature control method, so as to solve the problems in the background technology.
The invention is realized in this way, a microwave oven air fryer trinity device, including radiator fan, heating tube and temperature sensor, the said device also includes magnetron and control assembly, the said radiator fan, heating tube, temperature sensor and magnetron are all connected with electrical behavior of the control assembly, when the magnetron works, the said device reflects as the microwave oven function works; when the heat radiation fan works at half speed and the heating tube is switched on and off at a fixed periodic frequency, the device is embodied as an oven function; when the cooling fan works at full speed and the heating tube is switched on and off according to temperature control adjustment, the device realizes the function work of the air fryer.
Another object of the present invention is to provide a method for controlling the temperature of a cavity of a three-in-one device of an air fryer in a microwave oven, which comprises the following steps:
temperature regulation and control are carried out on the temperature overshoot stage, so that the heating pipe and the heating fan are started at full speed, the central temperature of the cavity of the device is rapidly raised, and heating is stopped when the temperature detected by the temperature sensor reaches a temperature set value Trset and is maintained for 2 s;
performing temperature regulation and control on the temperature callback stage, heating to realize temperature callback when the temperature Tr detected by the temperature sensor is reduced to Trset-delta1, and ending the current stage when the temperature Tr detected by the temperature sensor is increased to Trset-delta2 for 1 s;
the temperature is regulated and controlled in the self-regulation stage, the heating tube is operated and stopped according to the on-off duty ratio of the heating tube, the temperature detected by the temperature sensor is monitored, and the on-off duty ratio of the heating tube is regulated when the temperature detected by the temperature sensor is deviated from the set temperature value;
the temperature overshoot stage is a process that the temperature detected by the temperature sensor reaches a set temperature value from starting, then heating is stopped, and the temperature continues to rise after heating is stopped; the temperature adjusting stage is a process that the temperature falls back to Trset-delta1 and is heated to adjust the temperature; the self-regulation phase refers to the process from the end of the temperature callback phase to shutdown.
As a further scheme of the invention: the step of regulating the temperature in the temperature overshoot stage specifically includes:
determining a temperature compensation value temp _ bc according to the temperature set value Trset;
recording a temperature backup value of clear 0, namely TrBak is 0;
and (3) determining the on-off Period of the heating tube, wherein the on-off Duty ratio of the heating tube is clear 0, namely the Duty is 0.
As a further scheme of the invention: the step of regulating and controlling the temperature in the temperature regulation and reduction stage specifically comprises:
when the temperature is reduced, the heating is kept stopped, and when the temperature Tr detected by the temperature sensor is less than or equal to Trset, the on-off duty ratio of the heating tube is configured immediately;
when the temperature Tr detected by the temperature sensor is reduced to Trset-delta1, heating is carried out to adjust the temperature back;
the current phase ends after 1s when the temperature sensor detects a rise of temperature Tr to Trset-delta2, where delta1 > delta2 > 0.
Compared with the prior art, the invention has the beneficial effects that:
the running speed of the heat radiation fan comprises a half-speed mode and a full-speed mode, so that the heat of the cavity can flow uniformly. When the food is used at half speed, the phenomenon that the cooking quality and taste of the food are influenced by more water loss of the food can be avoided;
according to the invention, the hysteresis of the NTC thermistor is overcome through the temperature overshoot stage and the temperature callback stage, and the heating pipe and the fan are controlled to work in a matched mode to realize rapid temperature rise and approach of the cavity temperature and the NTC temperature; the heating tube is controlled to be simply heated to be switched on and switched off in a self-adjusting stage, and the difference between the temperature of the temperature sensor and a target temperature set value is detected in real time to adjust the switching-on and switching-off time, so that intelligent temperature control is realized.
Drawings
FIG. 1 is a schematic view of a three-in-one device for a microwave oven, air fryer and the like.
FIG. 2 is a flow chart of a method for controlling the cavity temperature of a three-in-one device of a microwave oven, an oven and an air fryer.
FIG. 3 is a flow chart of temperature control for temperature overshoot in a method for controlling the cavity temperature of a three-in-one device of an air fryer in a microwave oven.
FIG. 4 is a flow chart of temperature regulation and control in the temperature adjustment stage in a cavity temperature control method of a microwave oven, oven and air fryer three-in-one device.
FIG. 5 is a flow chart of temperature control for the self-regulation stage in a method for controlling the cavity temperature of a three-in-one device for a microwave oven, an oven and an air fryer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Specific implementations of the present invention are described in detail below with reference to specific embodiments.
As shown in fig. 1, an embodiment of the present invention provides a three-in-one device for an air fryer of a microwave oven, including a heat dissipation fan 101, a heating tube 102 and a temperature sensor 103, the device further including a magnetron 104 and a control component, wherein the heat dissipation fan 101, the heating tube 102, the temperature sensor 103 and the magnetron 104 are all electrically connected to the control component, and when the magnetron 104 works, the device is embodied as a microwave oven to function; when the heat dissipation fan 101 works at half speed and the heating tube 102 is switched on and off at a fixed periodic frequency, the device is embodied as an oven function; when the cooling fan 101 operates at full speed and the heating tube 102 is turned on and off according to temperature control adjustment, the device operates as an air fryer.
As shown in fig. 2, the embodiment of the present invention further provides a method for regulating and controlling the cavity temperature of a three-in-one device of an air fryer of a microwave oven, wherein the temperature is controlled in three stages, the first stage is a temperature overshoot stage, the second stage is a temperature readjustment stage, and the third stage is a self-regulation stage; the hysteresis of the NTC thermistor is overcome through a first stage and a second stage; controlling the heating tube 102 and the cooling fan 101 to work in a matched mode to realize rapid temperature rise, so that the temperature of the cavity is close to the NTC temperature; the heating tube 102 is controlled to be simply heated to be switched on and switched off through the third stage, and the difference between the temperature of the temperature sensor and the set value of the target temperature is detected in real time to adjust the switching-on and switching-off time so as to realize intelligent temperature control, wherein the method comprises the following steps:
200, regulating and controlling the temperature in the temperature overshoot stage, so that the heating pipe 102 and the heating fan 101 are started at full speed, the central temperature of the cavity of the device is rapidly raised, and the heating is stopped when the temperature Tr detected by the temperature sensor reaches the temperature set value Trset and is maintained for 2 s;
300, performing temperature regulation and control on the temperature callback stage, heating to realize temperature callback when the temperature Tr detected by the temperature sensor is reduced to Trset-delta1, and ending the current stage when the temperature Tr detected by the temperature sensor is increased to Trset-delta2 for 1 s;
400, regulating and controlling the temperature in the self-regulation stage, working and stopping the heating tube according to the on-off duty ratio of the heating tube, monitoring the temperature detected by the temperature sensor, and regulating the on-off duty ratio of the heating tube when the temperature detected by the temperature sensor deviates from a temperature set value;
the temperature overshoot stage is a process that the temperature detected by the temperature sensor reaches a set temperature value from starting, then heating is stopped, and the temperature continues to rise after heating is stopped; the temperature adjusting stage is a process that the temperature falls back to Trset-delta1 and is heated to adjust the temperature; the self-regulation phase refers to the process from the end of the temperature callback phase to shutdown.
As shown in fig. 3, the step of performing temperature regulation at the temperature overshoot stage specifically includes: determining a temperature compensation value temp _ bc according to the temperature set value Trset; the temperature compensation value temp _ bc has the function of adjusting the temperature average value of the temperature control curve to a temperature set value; recording a temperature backup value clear 0, namely TrBak is 0, and the function is to stop heating the cavity and the maximum value of the cavity in the temperature rising process after the recorded temperature reaches a set value; the on-off Duty ratio of the heating tube is clear 0, namely the Duty is 0, and in addition, the on-off Period of the heating tube needs to be determined according to the volume of the cavity and experimental experience; for example, Duty is 30s, and Period is 50s, which indicates that the heating tube is operated for 30s and then stops heating for 20 s. The device starts the temperature sensor to detect the temperature Tr and heats up when the temperature Tr does not reach the set temperature Trset; stopping heating when Tr is greater than or equal to Trset and maintained for 2 s; stopping heating the cavity, keeping the temperature of the cavity rising (overshooting), enabling heat to flow with wind under the working condition of the cooling fan 101, recording the highest temperature point by the TrBak, and when the temperature is in a descending trend, descending and maintaining for 3s, and ending the stage.
As shown in fig. 4, the step of performing temperature regulation on the temperature adjustment stage specifically includes: when the temperature is reduced, the heating is kept stopped, and when the temperature Tr detected by the temperature sensor is less than or equal to Trset, the on-off duty ratio of the heating tube is configured immediately (different temperature set values correspond to different duty ratio values, the duty ratio is larger when the temperature set value is larger, and vice versa); when the temperature Tr detected by the temperature sensor in 30s is reduced to Trset-delta1, heating to adjust the temperature back; when the temperature sensor detects that the temperature Tr rises to Trset-delta2 and lasts for 1s, the current stage is ended, wherein delta1 is more than delta2 is more than 0, the temperature is adjusted back to ensure that the cavity temperature is full, so that the start of the self-adjusting stage of the subsequent third stage can be pulled back to the range near the temperature set value, and the temperature is not lowered to meet the requirement due to the fact that the temperature is slowly increased away from the temperature set value range because of serious temperature downward detection.
As shown in fig. 5, the self-regulation phase needs to perform self-regulation according to the initial duty ratio given by the temperature overshoot phase, the heating tube 102 is heated during the on period of the duty ratio, and the heating tube 102 stops heating during the off period; in addition, the NTC detects whether the temperature deviates from the temperature set value, the duty cycle time is properly reduced when the temperature is too high, and the duty cycle time is properly increased when the temperature is too low, until the working time is over, the whole temperature control process is ended.
The present invention has been described in detail with reference to the preferred embodiments thereof, and it should be understood that the invention is not limited thereto, but is intended to cover modifications, equivalents, and improvements within the spirit and scope of the present invention.
It should be understood that, although the steps in the flowcharts of the embodiments of the present invention are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in various embodiments may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a non-volatile computer-readable storage medium, and can include the processes of the embodiments of the methods described above when the program is executed. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (4)
1. The three-in-one device comprises a cooling fan, a heating pipe and a temperature sensor, and is characterized by further comprising a magnetron and a control component, wherein the cooling fan, the heating pipe, the temperature sensor and the magnetron are all electrically connected with the control component; when the heat radiation fan works at half speed and the heating tube is switched on and off at a fixed periodic frequency, the device is embodied as an oven function; when the cooling fan works at full speed and the heating tube is switched on and off according to temperature control adjustment, the device realizes the function work of the air fryer.
2. A method for controlling the temperature of a cavity of a three-in-one device of an air fryer of a microwave oven, which is applied to the device of claim 1, the method comprises the following steps:
temperature regulation and control are carried out on the temperature overshoot stage, so that the heating pipe and the heating fan are started at full speed, the central temperature of the cavity of the device is raised, and heating is stopped when the temperature detected by the temperature sensor reaches a temperature set value Trset and is maintained for 2 s;
performing temperature regulation and control on the temperature callback stage, heating to realize temperature callback when the temperature Tr detected by the temperature sensor is reduced to Trset-delta1, and ending the current stage when the temperature Tr detected by the temperature sensor is increased to Trset-delta2 for 1 s;
the temperature is regulated and controlled in the self-regulation stage, the heating tube is operated and stopped according to the on-off duty ratio of the heating tube, the temperature detected by the temperature sensor is monitored, and the on-off duty ratio of the heating tube is regulated when the temperature detected by the temperature sensor is deviated from the set temperature value;
the temperature overshoot stage is a process that the temperature detected by the temperature sensor reaches a set temperature value from starting, then heating is stopped, and the temperature continues to rise after heating is stopped; the temperature adjusting stage is a process that the temperature falls back to Trset-delta1 and is heated to adjust the temperature; the self-regulation phase refers to the process from the end of the temperature callback phase to shutdown.
3. The method of claim 2, wherein the step of controlling the temperature of the cavity of the three-in-one device of the microwave oven, the oven and the air fryer specifically comprises:
determining a temperature compensation value temp _ bc according to the temperature set value Trset;
recording a temperature backup value of clear 0, namely TrBak is 0;
and (3) determining the on-off Period of the heating tube, wherein the on-off Duty ratio of the heating tube is clear 0, namely the Duty is 0.
4. The method of claim 3, wherein the step of adjusting the temperature of the temperature adjustment stage includes:
when the temperature is reduced, the heating is kept stopped, and when the temperature Tr detected by the temperature sensor is less than or equal to Trset, the on-off duty ratio of the heating tube is configured immediately;
when the temperature Tr detected by the temperature sensor is reduced to Trset-delta1, heating is carried out to adjust the temperature back;
the current phase ends after 1s when the temperature sensor detects a rise of temperature Tr to Trset-delta2, where delta1 > delta2 > 0.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210256650.7A CN114451790B (en) | 2022-03-16 | 2022-03-16 | Three-in-one device for air fryer of microwave oven and device cavity temperature control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210256650.7A CN114451790B (en) | 2022-03-16 | 2022-03-16 | Three-in-one device for air fryer of microwave oven and device cavity temperature control method |
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| CN114451790A true CN114451790A (en) | 2022-05-10 |
| CN114451790B CN114451790B (en) | 2024-06-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117148774A (en) * | 2023-10-20 | 2023-12-01 | 广州吉谷电器有限公司 | Heat dissipation control system and control circuit of air fryer |
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| CN215675328U (en) * | 2021-07-14 | 2022-01-28 | 浙江天喜厨电股份有限公司 | Air-fried microwave oven |
| US20220065459A1 (en) * | 2020-02-28 | 2022-03-03 | Team International Group of America Inc. | Cooking appliance |
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| CN203615383U (en) * | 2013-11-05 | 2014-05-28 | 美的集团股份有限公司 | Microwave oven with air frying function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117148774A (en) * | 2023-10-20 | 2023-12-01 | 广州吉谷电器有限公司 | Heat dissipation control system and control circuit of air fryer |
| CN117148774B (en) * | 2023-10-20 | 2024-03-19 | 广州吉谷电器有限公司 | Heat dissipation control system and control circuit of air fryer |
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| CN114451790B (en) | 2024-06-18 |
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