WO2017101286A1 - 微波炉的控制方法及控制装置 - Google Patents

微波炉的控制方法及控制装置 Download PDF

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Publication number
WO2017101286A1
WO2017101286A1 PCT/CN2016/086963 CN2016086963W WO2017101286A1 WO 2017101286 A1 WO2017101286 A1 WO 2017101286A1 CN 2016086963 W CN2016086963 W CN 2016086963W WO 2017101286 A1 WO2017101286 A1 WO 2017101286A1
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WIPO (PCT)
Prior art keywords
temperature
heating tube
microwave oven
predetermined
hot air
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PCT/CN2016/086963
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English (en)
French (fr)
Inventor
李孝根
唐彬
Original Assignee
广东美的厨房电器制造有限公司
美的集团股份有限公司
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Application filed by 广东美的厨房电器制造有限公司, 美的集团股份有限公司 filed Critical 广东美的厨房电器制造有限公司
Priority to EP16874350.8A priority Critical patent/EP3376115B1/en
Publication of WO2017101286A1 publication Critical patent/WO2017101286A1/zh
Priority to US16/005,668 priority patent/US20180295680A1/en

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6447—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors
    • H05B6/645—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors using temperature sensors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/66—Circuits
    • H05B6/68—Circuits for monitoring or control
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/66—Circuits
    • H05B6/68—Circuits for monitoring or control
    • H05B6/687—Circuits for monitoring or control for cooking
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/647—Aspects related to microwave heating combined with other heating techniques
    • H05B6/6473—Aspects related to microwave heating combined with other heating techniques combined with convection heating
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/647—Aspects related to microwave heating combined with other heating techniques
    • H05B6/6482—Aspects related to microwave heating combined with other heating techniques combined with radiant heating, e.g. infrared heating
    • H05B6/6485—Aspects related to microwave heating combined with other heating techniques combined with radiant heating, e.g. infrared heating further combined with convection heating

Definitions

  • the present invention relates to the field of microwave oven technology, and in particular to a method for controlling a microwave oven and a control device for a microwave oven.
  • microwave ovens with composite functions are stainless steel and epoxy coated cavities.
  • microwave ovens with enamel chambers have emerged.
  • the enamel chambers have been well received by consumers for their ease of cleaning.
  • the enamel coated chambers are made of stainless steel and epoxy coated. The difference in the cavity is the inherent thermal insulation properties of the enamel.
  • the hot air convection heating tube will increase the surface temperature of the stainless steel cover due to the continuous heat conduction of the hot air and the enamel coating.
  • the microwave oven will not cause the microwave oven to maintain the heat resistance.
  • the temperature of the surface drops immediately.
  • reheating to increase the heat and center temperature of the enamel may cause the surface temperature of the stainless steel casing to be too high, which may cause the surface temperature of the microwave oven to fail to meet the temperature standard.
  • the present invention aims to solve at least one of the technical problems existing in the prior art or related art.
  • a microwave oven control method comprising an enamel cavity, a hot air convection heating tube for heating the enamel cavity, and a barbecue a heat pipe, and a temperature sensor for detecting a temperature in the enamel cavity
  • the method for controlling the microwave oven comprising: detecting, by the temperature sensor, a temperature in the enamel cavity; according to the temperature sensor detecting Determining the relationship between the temperature in the enamel chamber and the predetermined temperature, controlling the operation and closing of the hot convection heating tube and the grilling heating tube, and controlling the grilling heating tube to operate at a predetermined cycle during operation and each cycle The length of work.
  • the temperature in the enamel cavity is detected, and according to the temperature in the enamel cavity and the predetermined temperature.
  • the relationship controls the operation and shutdown of the hot convection heating tube and the grilling heating tube, and controls the operation of the grilling heating tube at a predetermined cycle during operation and the working period per cycle, so as to ensure a rapid increase in the center temperature of the microwave oven cavity.
  • the steps of controlling the operation and shutdown of the hot air convection heating pipe and the grilling heat pipe, and controlling the operation of the grilling heat pipe at a predetermined cycle during operation and the working time per cycle Specifically, when receiving the instruction to start the microwave oven, controlling the hot air convection heating tube and the barbecue heating tube to operate, and controlling the barbecue heating tube to work for a first predetermined period of time per cycle; when the enamel chamber is inside When the temperature reaches a difference between the predetermined temperature and the first set value, the hot air convection heat pipe and the grill heat pipe are controlled to be closed.
  • the hot air convection heating pipe and the barbecue heat pipe are controlled by the time when the microwave oven is just started (that is, when the instruction to start the microwave oven is received) And controlling the grilling heating tube to work for a first predetermined period of time per cycle, and when the temperature in the enamel chamber reaches a difference between the predetermined temperature and the first set value, controlling the hot air convection heating tube and the grilling heating tube to be closed, so that the microwave oven is closed
  • the heating can be turned off in time to avoid unnecessary rise of the temperature of the chamber, so as to effectively control the surface temperature of the microwave oven cover.
  • the temperature in the enamel cavity of the microwave oven first rises and then falls.
  • the method further includes: when the temperature in the enamel chamber is lower than a difference between the predetermined temperature and the second set value And controlling the hot air convection heating tube and the barbecue heating tube to operate, and controlling the barbecue heating tube to operate for a second predetermined period of time per cycle, wherein the second predetermined duration is less than the first predetermined duration.
  • the hot air convection is controlled.
  • the heat pipe and the barbecue heating tube operate, and control the barbecue heating tube to work for a second predetermined period of time per cycle, and the second predetermined length of time is less than the first predetermined length of time, so that after the temperature in the enamel chamber is lowered, the enamel chamber can be lifted relatively slowly
  • the temperature because the temperature at this time is already close to the predetermined temperature, the surface temperature of the microwave oven cover is effectively controlled to prevent the temperature of the enamel cavity from rising too fast, which causes the temperature of the microwave oven cover to be difficult to control.
  • the method further includes: if the cooking process is not finished,
  • the hot air convection heat pipe and the grill heat pipe are controlled to operate, and the grill heat pipe is controlled to operate for a third predetermined period of time per cycle.
  • the hot air convection is controlled.
  • Heat pipe and barbecue heating tube are closed; if the temperature in the enamel chamber When the degree is lower than the difference between the predetermined temperature and the fourth set value, the hot air convection heating tube and the barbecue heating tube are controlled to operate, and the barbecue heating tube is controlled to work for a third predetermined period of time per cycle, so that when the cooking process is not finished, the The temperature inside the enamel chamber is controlled within a certain range, and the temperature of the microwave oven cover is indirectly controlled within the range required by the temperature standard, thereby realizing effective control of the temperature of the microwave oven cover.
  • the first predetermined duration is 40% to 60% of the predetermined period
  • the second predetermined duration is 20% to 40% of the predetermined period
  • the first set value is 5 ° C to 10 ° C
  • the second set value is 6 ° C to 11 ° C
  • the third set value is 5 ° C to 8 ° C
  • the fourth set value is 2 ° C to 5 ° C.
  • the predetermined period of the grilling heat pipe during operation is 10 s to 20 s.
  • a control device for a microwave oven comprising an enamel cavity, a hot air convection heating tube for heating the enamel cavity, and a barbecue heating tube, and a temperature sensor for detecting the temperature in the enamel chamber
  • the control device of the microwave oven comprising: a detecting unit for detecting a temperature in the enamel cavity by the temperature sensor; and a control unit for detecting according to the detecting a relationship between a temperature detected by the unit and the predetermined temperature in the enamel chamber, controlling operation and closing of the hot air convection heating tube and the grilling heating tube, and controlling the grilling heating tube to operate at a predetermined period Work and the length of work per cycle.
  • a control device for a microwave oven for an enamel cavity microwave oven having a composite function (ie, a hot air convection function and a grilling function), by detecting a temperature in the enamel cavity and according to a temperature in the enamel cavity and a predetermined temperature
  • the relationship controls the operation and shutdown of the hot convection heating tube and the grilling heating tube, and controls the operation of the grilling heating tube at a predetermined cycle during operation and the working period per cycle, so as to ensure a rapid increase in the center temperature of the microwave oven cavity.
  • a composite function ie, a hot air convection function and a grilling function
  • control unit is specifically configured to: when receiving an instruction to start the microwave oven, control the hot air convection heating tube and the barbecue heating tube to operate, and control the barbecue heating tube for each Periodically operating for a first predetermined length of time, and controlling the hot air convection heating tube and the grilling heating tube when the detecting unit detects that the temperature in the enamel chamber reaches a difference between the predetermined temperature and the first set value shut down.
  • a control device for a microwave oven controls the operation of the hot air convection heat pipe and the grilling heat pipe when the microwave oven is just started (ie, when an instruction to start the microwave oven is received), and controls the grilling heat pipe to work first per cycle
  • the predetermined length of time, and when the temperature in the enamel chamber reaches a difference between the predetermined temperature and the first set value, the hot air convection heating tube and the grilling heating tube are controlled to be closed, so that when the temperature of the oven chamber of the microwave oven reaches a predetermined temperature, the temperature can be closed in time. Heating to avoid unnecessary rise of the cavity temperature to effectively control the surface temperature of the microwave oven cover.
  • the temperature in the enamel cavity of the microwave oven first rises and then falls.
  • control unit after controlling the hot air convection heat pipe and the barbecue heat pipe to be closed, the control unit is further configured to: when the detecting unit detects that the temperature in the enamel cavity is lower than Controlling the hot air convection heating tube and the barbecue heating tube to operate, and controlling the barbecue heating tube to operate for a second predetermined period of time per cycle, wherein the second predetermined The duration is less than the first predetermined duration.
  • the hot air convection is controlled when the temperature in the enamel chamber is lower than the difference between the predetermined temperature and the second set value after controlling the hot air convection heat pipe and the grill heat pipe to be closed.
  • the heat pipe and the barbecue heating tube operate, and control the barbecue heating tube to work for a second predetermined period of time per cycle, and the second predetermined length of time is less than the first predetermined length of time, so that after the temperature in the enamel chamber is lowered, the enamel chamber can be lifted relatively slowly Temperature (because the temperature at this time is already close to the predetermined temperature), to effectively control the surface temperature of the microwave oven cover, to avoid the temperature rise in the enamel cavity is too fast, and the temperature of the microwave oven cover is not easy to control. question.
  • control unit controls the operation of the hot air convection heating tube and the barbecue heating tube, and controls the barbecue heating tube to work for a second predetermined period of time per cycle, and is further used for: if cooking The process is not over, then
  • the hot air convection is controlled.
  • the heat pipe and the barbecue heating pipe are closed; if the temperature in the enamel cavity is lower than the difference between the predetermined temperature and the fourth set value, the hot air convection heating pipe and the barbecue heating pipe are controlled to operate, and the barbecue heating pipe is controlled to work for the third time per cycle.
  • the length of time makes it possible to control the temperature of the enamel cavity within a certain range when the cooking process is not finished, thereby indirectly controlling the temperature of the microwave oven cover within the range required by the temperature standard, thereby realizing effective control of the temperature of the microwave oven cover.
  • the first predetermined duration is 40% to 60% of the predetermined period
  • the second predetermined duration is 20% to 40% of the predetermined period
  • the first set value is 5 ° C to 10 ° C
  • the second set value is 6 ° C to 11 ° C
  • the third set value is 5 ° C to 8 ° C
  • the fourth set value is 2 ° C to 5 ° C.
  • FIG. 1 shows a schematic structural view of a microwave oven according to an embodiment of the present invention
  • FIG. 2 is a schematic flow chart showing a control method of a microwave oven according to an embodiment of the present invention
  • FIG. 3 shows a schematic block diagram of a control device of a microwave oven in accordance with an embodiment of the present invention
  • FIG. 4 is a schematic diagram showing the temperature of a microwave oven cavity according to an embodiment of the present invention.
  • FIG. 5 shows a schematic flow chart of a method of controlling a microwave oven according to another embodiment of the present invention.
  • FIG. 1 shows a schematic structural view of a microwave oven according to an embodiment of the present invention.
  • a microwave oven 1 includes: a cover 11, an enamel cavity 12, a hot air convection heat pipe 13 for heating the enamel cavity 12, and a grilling heat pipe 14, The temperature inside the enamel cavity 12 is detected by a temperature sensor 15, a magnetron 16, and a heat radiating fan 17.
  • FIG. 2 shows a schematic flow chart of a method of controlling a microwave oven in accordance with one embodiment of the present invention.
  • a method for controlling a microwave oven includes:
  • Step 202 detecting a temperature in the enamel cavity by a temperature sensor
  • Step 204 according to the temperature and pre-measurement of the enamel cavity detected by the temperature sensor
  • the relationship between the constant temperatures controls the operation and shutdown of the hot air convection heating tube and the grilling heating tube, and controls the operation of the grilling heating tube at a predetermined cycle during operation and the working period per cycle.
  • the hot air convection heating tube is controlled by detecting the temperature in the enamel chamber and according to the relationship between the temperature in the enamel chamber and the predetermined temperature. And the operation and closing of the barbecue heating tube, and controlling the operation of the barbecue heating tube in a predetermined cycle during operation and the working period per cycle, so as to avoid the temperature in the cavity under the premise of ensuring rapid increase of the central temperature in the microwave cavity.
  • the excessive rise causes the surface temperature of the outer surface of the microwave oven to be too high, and the surface temperature of the enamel cavity microwave oven having a composite function is effectively controlled.
  • the steps of controlling the operation and shutdown of the hot air convection heating pipe and the grilling heat pipe, and controlling the operation of the grilling heat pipe at a predetermined cycle during operation and the working time per cycle Specifically, when receiving the instruction to start the microwave oven, controlling the hot air convection heating tube and the barbecue heating tube to operate, and controlling the barbecue heating tube to work for a first predetermined period of time per cycle; when the enamel chamber is inside When the temperature reaches a difference between the predetermined temperature and the first set value, the hot air convection heat pipe and the grill heat pipe are controlled to be closed.
  • the hot air convection heating tube and the barbecue heating tube By operating the hot air convection heating tube and the barbecue heating tube when the microwave oven is started (ie, receiving the instruction to start the microwave oven), and controlling the grilling heating tube to work for a first predetermined period of time per cycle, and the temperature in the enamel chamber reaches a predetermined time.
  • the hot air convection heating tube and the grilling heating tube are controlled to be closed, so that when the temperature of the oven cavity of the microwave oven is to reach a predetermined temperature, the heating can be turned off in time to avoid unnecessary rise of the cavity temperature, so as to avoid unnecessary rise of the cavity temperature,
  • the surface temperature of the microwave oven cover is effectively controlled. Among them, after controlling the hot air convection heating tube and the barbecue heating tube to be closed, the temperature in the enamel cavity of the microwave oven first rises and then falls.
  • the method further includes: when the temperature in the enamel chamber is lower than a difference between the predetermined temperature and the second set value And controlling the hot air convection heating tube and the barbecue heating tube to operate, and controlling the barbecue heating tube to operate for a second predetermined period of time per cycle, wherein the second predetermined duration is less than the first predetermined duration.
  • the hot air convection heating tube and the grilling heating tube After controlling the hot air convection heating tube and the grilling heating tube to be closed, when the temperature in the enamel chamber is lower than the difference between the predetermined temperature and the second set value, the hot air convection heating tube and the grilling heating tube are controlled to operate, and the grilling heating tube is controlled.
  • Working for a second predetermined period of time per cycle, and the second predetermined duration is less than the first predetermined period of time, so that after the temperature in the enamel chamber is lowered, the temperature in the enamel chamber can be relatively slowly raised (since the temperature has approached the predetermined temperature)
  • the temperature of the enamel cavity is not raised too fast, and the temperature of the microwave oven cover is not easily controlled.
  • the method further includes: if the cooking process is not finished,
  • the hot air convection heat pipe and the grill heat pipe are controlled to operate, and the grill heat pipe is controlled to operate for a third predetermined period of time per cycle.
  • the hot air convection heating tube and the grilling heating tube are controlled to be closed; if the enamel chamber is inside When the temperature is lower than the difference between the predetermined temperature and the fourth set value, the hot air convection heating tube and the barbecue heating tube are controlled to operate, and the barbecue heating tube is controlled to work for a third predetermined period of time per cycle, so that when the cooking process is not finished, the The temperature inside the enamel chamber is controlled within a certain range, and the temperature of the microwave oven cover is indirectly controlled within the range required by the temperature standard, thereby realizing effective control of the temperature of the microwave oven cover.
  • the first predetermined duration is 40% to 60% of the predetermined period
  • the second predetermined duration is 20% to 40% of the predetermined period
  • the first set value is 5 ° C to 10 ° C
  • the second set value is 6 ° C to 11 ° C
  • the third set value is 5 ° C to 8 ° C
  • the fourth set value is 2 ° C to 5 ° C.
  • the predetermined period of the grilling heat pipe during operation is 10 s to 20s.
  • FIG. 3 shows a schematic block diagram of a control device of a microwave oven according to an embodiment of the present invention.
  • a control device 300 for a microwave oven includes a detecting unit 302 and a control unit 304.
  • the detecting unit 302 is configured to detect the temperature in the enamel cavity by the temperature sensor; the control unit 304 is configured to control the hot air convection heating tube according to the relationship between the temperature in the enamel cavity detected by the detecting unit 302 and the predetermined temperature.
  • the grilling heat pipe is operated and closed, and the grilling heat pipe is controlled to operate at a predetermined cycle during operation and the working time per cycle.
  • the hot air convection heating tube is controlled by detecting the temperature in the enamel chamber and according to the relationship between the temperature in the enamel chamber and the predetermined temperature. And the operation and closing of the barbecue heating tube, and controlling the operation of the barbecue heating tube in a predetermined cycle during operation and the working period per cycle, so as to avoid the temperature in the cavity under the premise of ensuring rapid increase of the central temperature in the microwave cavity.
  • the excessive rise causes the surface temperature of the outer surface of the microwave oven to be too high, and the surface temperature of the enamel cavity microwave oven having a composite function is effectively controlled.
  • control device 300 of the microwave oven according to the above embodiment of the present invention may further have the following technical features:
  • control unit 304 is specifically configured to: when receiving an instruction to start the microwave oven, control the hot air convection heating tube and the barbecue heating tube to operate, and control the barbecue heating tube Working each cycle for a first predetermined length of time, and controlling the hot air convection heating tube and the grilling when the detecting unit 302 detects that the temperature in the enamel cavity reaches a difference between the predetermined temperature and the first set value The heating tube is closed.
  • the hot air convection heating tube and the barbecue heating tube By operating the hot air convection heating tube and the barbecue heating tube when the microwave oven is started (ie, receiving the instruction to start the microwave oven), and controlling the grilling heating tube to work for a first predetermined period of time per cycle, and the temperature in the enamel chamber reaches a predetermined time.
  • the hot air convection heating tube and the grilling heating tube are controlled to be closed, so that when the temperature of the oven cavity of the microwave oven is to reach a predetermined temperature, the heating can be turned off in time to avoid unnecessary rise of the cavity temperature, so as to avoid unnecessary rise of the cavity temperature,
  • the surface temperature of the microwave oven cover is effectively controlled. Among them, after controlling the hot air convection heating tube and the barbecue heating tube to be closed, the temperature in the enamel cavity of the microwave oven first rises and then falls.
  • the control unit 304 controls the hot air convection After the heat pipe and the grilling heat pipe are closed, the method further comprises: controlling the hot air convection when the detecting unit 302 detects that the temperature in the enamel cavity is lower than a difference between the predetermined temperature and the second set value.
  • the heating tube and the grilling heating tube are operated, and the grilling heating tube is controlled to operate for a second predetermined period of time per cycle, wherein the second predetermined period of time is less than the first predetermined period of time.
  • the hot air convection heating tube and the grilling heating tube After controlling the hot air convection heating tube and the grilling heating tube to be closed, when the temperature in the enamel chamber is lower than the difference between the predetermined temperature and the second set value, the hot air convection heating tube and the grilling heating tube are controlled to operate, and the grilling heating tube is controlled.
  • Working for a second predetermined period of time per cycle, and the second predetermined duration is less than the first predetermined period of time, so that after the temperature in the enamel chamber is lowered, the temperature in the enamel chamber can be relatively slowly raised (since the temperature has approached the predetermined temperature)
  • the temperature of the enamel cavity is not raised too fast, and the temperature of the microwave oven cover is not easily controlled.
  • control unit 304 controls the hot air convection heating tube and the barbecue heating tube to operate, and controls the barbecue heating tube to work for a second predetermined period of time per cycle
  • control unit 304 is further configured to: If the cooking process is not over, then
  • the hot air convection heating tube and the grilling heating tube are controlled to be closed; if the enamel chamber is inside When the temperature is lower than the difference between the predetermined temperature and the fourth set value, the hot air convection heating tube and the barbecue heating tube are controlled to operate, and the barbecue heating tube is controlled to work for a third predetermined period of time per cycle, so that when the cooking process is not finished, the The temperature inside the enamel chamber is controlled within a certain range, and the temperature of the microwave oven cover is indirectly controlled within the range required by the temperature standard, thereby realizing effective control of the temperature of the microwave oven cover.
  • the first predetermined duration is 40% of the predetermined period Up to 60%
  • the second predetermined duration is 20% to 40% of the predetermined period
  • the third predetermined duration is 20% to 40% of the predetermined period
  • the first set value is 5 ° C to 10 ° C
  • the second set value is 6 ° C to 11 ° C
  • the third set value is 5 ° C to 8 ° C
  • the fourth set value is 2 ° C to 5 ° C.
  • the hot air convection heating tube starts to work, before the first temperature reaches the center of the cavity to set the temperature T0 (such as 200 ° C), a higher output is required for rapid temperature rise, and the cavity center temperature rises too fast, resulting in the microwave oven cover.
  • the surface temperature rise is too high and will exceed the predetermined temperature rise. Therefore, in the technical solution proposed by the present invention, the hot air convection heating tube and the barbecue heating tube are simultaneously turned off at the same time before the first temperature reaches T0 after starting the work, that is, slightly lower than T0, so as to effectively reduce unnecessary The temperature rises to control the rise in the surface temperature of the microwave oven cover.
  • the present invention shortens the working cycle of the barbecue heating pipe to 10s.
  • the temperature range between the highest and lowest points of the cavity temperature can be controlled within an average of 20 °C.
  • the specific control logic is shown in Figure 4:
  • Stage 1 The microwave oven starts, the hot air convection heating tube runs at full power, the barbecue heating tube runs and closes according to a certain period, open 40 ⁇ 60% cycle, close 60 ⁇ 40% cycle (if the cycle is 15s, then open 7 seconds, off) 8 seconds); the temperature sensor T of the temperature sensor is compared with the center temperature T0 of the cavity.
  • T>T0- ⁇ t1 the range of ⁇ t1 is (5-10) °C, and the hot air convection heating tube is turned off. BBQ heating tube. At this time, the temperature of the cavity rises slightly and then begins to decrease.
  • Stage 2 The temperature sensor continues to detect the temperature of the cavity, and compares the detected temperature T with the center setting temperature T0 of the cavity.
  • T T ⁇ (T0- ⁇ t2) °C
  • the range of ⁇ t2 is (6-11).
  • °C hot air convection heating tube all-pass, barbecue heating tube runs and closes according to a certain cycle, open 20 ⁇ 40% cycle, off 80 ⁇ 60% cycle (such as cycle 15S, then open 3 seconds, off 12 seconds). At this time, the temperature of the cavity slightly drops and then starts to rise.
  • Stage 3 The temperature sensor continues to detect the temperature of the cavity, and compares the detected temperature T with the set center temperature T0 of the cavity.
  • T>T0+ ⁇ t3 the range of ⁇ t3 is (5-8) °C, hot air convection
  • the heating tube is closed and the barbecue heating tube is closed. At this time, the temperature of the cavity rises slightly and then starts to go down. drop.
  • the temperature sensor continues to detect the temperature of the cavity, and compares the detected temperature T with the set center temperature T0 of the cavity.
  • T ⁇ T0- ⁇ t4 the range of ⁇ t4 is (2-5) °C
  • the hot air convection heating tube All-pass, barbecue heating tube runs and closes according to a certain period, open 20 ⁇ 40% cycle, close 80 ⁇ 60% cycle (if the cycle is 15s, then open for 3 seconds, close for 12 seconds). Thereafter, the above process of stage 3 is continued until the end of cooking.
  • a method for controlling a microwave oven according to another embodiment of the present invention includes:
  • step 502 the microwave oven is started.
  • step 504 the hot air convection heating tube is controlled to pass all the way, and the barbecue heating tube works in a certain period, and is opened for 7 s and closed for 8 s per cycle.
  • step 506 it is determined whether the temperature T in the cavity is greater than T0- ⁇ t1. If yes, step 508 is performed; otherwise, step 504 is returned.
  • step 508 the hot air convection heating tube is controlled to be closed, and the barbecue heating tube is closed.
  • step 510 it is determined whether the temperature T in the cavity is less than T0- ⁇ t2. If yes, step 512 is performed; otherwise, step 508 is returned.
  • step 512 the hot air convection heating tube is controlled to pass all the way, and the barbecue heating tube works in a certain cycle, and is opened for 3 s and closed for 12 s per cycle.
  • step 514 it is determined whether the temperature T in the cavity is greater than T0 + ⁇ t3. If yes, step 516 is performed; otherwise, returning to step 512.
  • step 516 the hot air convection heating tube is controlled to be closed, and the barbecue heating tube is closed.
  • step 518 it is determined whether the temperature T in the cavity is less than T0- ⁇ t4, and if yes, returns to step 512; otherwise, returns to step 516.
  • the hot air convection heating tube and the barbecue heating tube are used together, and the control period of the barbecue heating tube is shortened to an internal period of 10s to 20s, which can effectively prevent the microwave oven from being in the initial temperature of the startup.
  • the problem of excessive rise can effectively control the center temperature and surface temperature of enamel microwave oven products with composite functions (hot air convection function and grilling function) to meet the requirements of temperature standards.
  • the present invention proposes a new control scheme for a microwave oven, which can avoid the problem that the temperature of the outer surface of the microwave oven is too high due to excessive temperature rise in the cavity, and realizes Surface temperature of composite enamel cavity microwave oven Effective control of degrees.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Ovens (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
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Abstract

一种微波炉（1）的控制方法和控制装置（300）。微波炉（1）包括搪瓷腔体（12）、对搪瓷腔体（12）进行加热的热风对流发热管（13）和烧烤发热管（14），以及对搪瓷腔体（12）内的温度进行检测的温度传感器（15）。微波炉（1）的控制方法包括：通过温度传感器（15）检测搪瓷腔体（12）内的温度，判断该温度和预定温度之间的关系，控制热风对流发热管（13）和烧烤发热管（14）的运行和关闭，并控制烧烤发热管（14）在运行时以预定周期进行工作及每周期的工作时长。微波炉（1）的控制装置（300）包括检测温度的检测单元（302）和控制发热管运行状态的控制单元（304）。该微波炉（1）的控制方法和控制装置（300）可有效控制微波炉（1）的表面温度。

Description

微波炉的控制方法及控制装置
本申请要求于2015年12月16日提交中国专利局、申请号为201510952254.8、发明名称为“微波炉的控制方法及控制装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及微波炉技术领域，具体而言，涉及一种微波炉的控制方法和一种微波炉的控制装置。
背景技术
目前，现有的具有复合功能(热风对流和烧烤功能)的微波炉都是不锈钢和环氧涂层的腔体。随着微波炉技术的发展，逐渐出现了搪瓷腔体的微波炉，搪瓷腔体由于易于清洁，用于微波炉产品上受到了消费者的一致好评，搪瓷涂层的腔体与不锈钢和环氧涂层的腔体的不同点在于搪瓷固有的保温特性。
为了提高微波炉腔体内的中心温度，热风对流发热管在单独发热时，会因为热风和搪瓷涂层的持续导热使不锈钢外罩表面温度持续上升，在停止加热时因搪瓷的保温性能导致不会使微波炉表面的温度立刻下降。换句话说，由于搪瓷涂层固有的保温特性，使得为了提高搪瓷保存的热量和中心温度进行的再加热会使不锈钢外罩的表面温度过高，进而会导致微波炉表面温度不符合温度标准的要求。
因此，如何能够有效控制具有复合功能的搪瓷腔体微波炉的表面温度成为亟待解决的技术问题。
发明内容
本发明旨在至少解决现有技术或相关技术中存在的技术问题之一。
为此，本发明的目的在于提出了一种新的微波炉的控制方案，实现了对具有复合功能的搪瓷腔体微波炉的表面温度的有效控制。
为实现上述目的，根据本发明的第一方面的实施例，提出了一种微波炉的控制方法，所述微波炉包括搪瓷腔体、用于对所述搪瓷腔体进行加热的热风对流发热管和烧烤发热管，以及对所述搪瓷腔体内的温度进行检测的温度传感器，所述微波炉的控制方法，包括：通过所述温度传感器检测所述搪瓷腔体内的温度；根据所述温度传感器检测到的所述搪瓷腔体内的温度和预定温度之间的关系，控制所述热风对流发热管和所述烧烤发热管的运行和关闭，并控制所述烧烤发热管在运行时以预定周期进行工作及每周期的工作时长。
根据本发明的实施例的微波炉的控制方法，对于具有复合功能(即热风对流功能和烧烤功能)的搪瓷腔体微波炉，通过检测搪瓷腔体内的温度，并根据搪瓷腔体内的温度和预定温度之间的关系控制热风对流发热管和烧烤发热管的运行和关闭，并控制烧烤发热管在运行时以预定周期进行工作及每周期的工作时长，使得能够在确保迅速提升微波炉腔体内的中心温度的前提下，避免腔体内的温度过度上升而导致微波炉的外罩表面温度过高的问题，实现了对具有复合功能的搪瓷腔体微波炉的表面温度的有效控制。
根据本发明的上述实施例的微波炉的控制方法，还可以具有以下技术特征：
根据本发明的一个实施例，控制所述热风对流发热管和所述烧烤发热管的运行和关闭，并控制所述烧烤发热管在运行时以预定的周期进行工作及每周期的工作时长的步骤具体包括：在接收到启动所述微波炉的指令时，控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第一预定时长；当所述搪瓷腔体内的温度达到所述预定温度与第一设定值之差时，控制所述热风对流发热管和所述烧烤发热管关闭。
根据本发明的实施例的微波炉的控制方法，通过在刚启动微波炉时(即接收到启动微波炉的指令时)，控制热风对流发热管和烧烤发热管运 行，并控制烧烤发热管每周期工作第一预定时长，且在搪瓷腔体内的温度达到预定温度与第一设定值之差时，控制热风对流发热管和烧烤发热管关闭，使得在微波炉的炉腔温度将要达到预定温度时，能够及时关闭加热，避免腔体温度不必要的上升，以对微波炉外罩的表面温度进行有效地控制。其中，在控制热风对流发热管和烧烤发热管关闭后，微波炉搪瓷腔体内的温度先上升后下降。
根据本发明的一个实施例，在控制所述热风对流发热管和所述烧烤发热管关闭之后，还包括：当所述搪瓷腔体内的温度低于所述预定温度与第二设定值之差时，控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第二预定时长，其中，所述第二预定时长小于所述第一预定时长。
根据本发明的实施例的微波炉的控制方法，通过在控制热风对流发热管和烧烤发热管关闭之后，当搪瓷腔体内的温度低于预定温度与第二设定值之差时，控制热风对流发热管和烧烤发热管运行，并控制烧烤发热管每周期工作第二预定时长，且第二预定时长小于第一预定时长，使得在搪瓷腔体内的温度降低后，能够相对缓慢地提升搪瓷腔体内的温度(由于此时的温度已经接近预定温度)，以对微波炉外罩的表面温度进行有效地控制，避免搪瓷腔体内的温度升高过快而导致微波炉外罩温度不易控制的问题。
根据本发明的一个实施例，在控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第二预定时长之后，还包括：若烹饪过程未结束，则
在所述搪瓷腔体内的温度达到所述预定温度与第三设定值之和时，控制所述热风对流发热管和所述烧烤发热管关闭；以及在所述搪瓷腔体内的温度低于所述预定温度与第四设定值之差时，控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第三预定时长。
根据本发明的实施例的微波炉的控制方法，通过在控制烧烤发热管每周期工作第二预定时长之后，若搪瓷腔体内的温度达到预定温度与第三设定值之和，则控制热风对流发热管和烧烤发热管关闭；若搪瓷腔体内的温 度低于预定温度与第四设定值之差时，则控制热风对流发热管和烧烤发热管运行，并控制烧烤发热管每周期工作第三预定时长，使得在烹饪过程未结束时，能够将搪瓷腔体内的温度控制在一定范围内，进而间接将微波炉外罩的温度控制在温度标准要求的范围内，实现了对微波炉外罩温度的有效控制。
其中，若接收到烹饪结束的指令，或在烹饪程序结束时，确定烹饪过程结束；若未接收到烹饪结束的指令，且烹饪程序未结束时，确定烹饪过程未结束。
根据本发明的一个实施例，所述第一预定时长占所述预定周期的40％至60％，所述第二预定时长占所述预定周期的20％至40％，所述第三预定时长占所述预定周期的20％至40％；
所述第一设定值为5℃至10℃，所述第二设定值为6℃至11℃，所述第三设定值为5℃至8℃，所述第四设定值为2℃至5℃。
根据本发明的一个实施例，烧烤发热管在运行时的预定周期为10s至20s。
根据本发明第二方面的实施例，还提出了一种微波炉的控制装置，所述微波炉包括搪瓷腔体、用于对所述搪瓷腔体进行加热的热风对流发热管和烧烤发热管，以及对所述搪瓷腔体内的温度进行检测的温度传感器，所述微波炉的控制装置，包括：检测单元，用于通过所述温度传感器检测所述搪瓷腔体内的温度；控制单元，用于根据所述检测单元检测到的所述搪瓷腔体内的温度和预定温度之间的关系，控制所述热风对流发热管和所述烧烤发热管的运行和关闭，并控制所述烧烤发热管在运行时以预定周期进行工作及每周期的工作时长。
根据本发明的实施例的微波炉的控制装置，对于具有复合功能(即热风对流功能和烧烤功能)的搪瓷腔体微波炉，通过检测搪瓷腔体内的温度，并根据搪瓷腔体内的温度和预定温度之间的关系控制热风对流发热管和烧烤发热管的运行和关闭，并控制烧烤发热管在运行时以预定周期进行工作及每周期的工作时长，使得能够在确保迅速提升微波炉腔体内的中心温度的前提下，避免腔体内的温度过度上升而导致微波炉的外罩表面温度 过高的问题，实现了对具有复合功能的搪瓷腔体微波炉的表面温度的有效控制。
根据本发明的上述实施例的微波炉的控制装置，还可以具有以下技术特征：
根据本发明的一个实施例，所述控制单元具体用于：在接收到启动所述微波炉的指令时，控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第一预定时长，以及在所述检测单元检测到所述搪瓷腔体内的温度达到所述预定温度与第一设定值之差时，控制所述热风对流发热管和所述烧烤发热管关闭。
根据本发明的实施例的微波炉的控制装置，通过在刚启动微波炉时(即接收到启动微波炉的指令时)，控制热风对流发热管和烧烤发热管运行，并控制烧烤发热管每周期工作第一预定时长，且在搪瓷腔体内的温度达到预定温度与第一设定值之差时，控制热风对流发热管和烧烤发热管关闭，使得在微波炉的炉腔温度将要达到预定温度时，能够及时关闭加热，避免腔体温度不必要的上升，以对微波炉外罩的表面温度进行有效地控制。其中，在控制热风对流发热管和烧烤发热管关闭后，微波炉搪瓷腔体内的温度先上升后下降。
根据本发明的一个实施例，所述控制单元在控制所述热风对流发热管和所述烧烤发热管关闭之后，还用于：在所述检测单元检测到所述搪瓷腔体内的温度低于所述预定温度与第二设定值之差时，控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第二预定时长，其中，所述第二预定时长小于所述第一预定时长。
根据本发明的实施例的微波炉的控制装置，通过在控制热风对流发热管和烧烤发热管关闭之后，当搪瓷腔体内的温度低于预定温度与第二设定值之差时，控制热风对流发热管和烧烤发热管运行，并控制烧烤发热管每周期工作第二预定时长，且第二预定时长小于第一预定时长，使得在搪瓷腔体内的温度降低后，能够相对缓慢地提升搪瓷腔体内的温度(由于此时的温度已经接近预定温度)，以对微波炉外罩的表面温度进行有效地控制，避免搪瓷腔体内的温度升高过快而导致微波炉外罩温度不易控制的问 题。
根据本发明的一个实施例，所述控制单元在控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第二预定时长之后，还用于：若烹饪过程未结束，则
在所述检测单元检测到所述搪瓷腔体内的温度达到所述预定温度与第三设定值之和时，控制所述热风对流发热管和所述烧烤发热管关闭，以及在所述检测单元检测到所述搪瓷腔体内的温度低于所述预定温度与第四设定值之差时，控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第三预定时长。
根据本发明的实施例的微波炉的控制装置，通过在控制烧烤发热管每周期工作第二预定时长之后，若搪瓷腔体内的温度达到预定温度与第三设定值之和，则控制热风对流发热管和烧烤发热管关闭；若搪瓷腔体内的温度低于预定温度与第四设定值之差时，则控制热风对流发热管和烧烤发热管运行，并控制烧烤发热管每周期工作第三预定时长，使得在烹饪过程未结束时，能够将搪瓷腔体内的温度控制在一定范围内，进而间接将微波炉外罩的温度控制在温度标准要求的范围内，实现了对微波炉外罩温度的有效控制。
其中，若接收到烹饪结束的指令，或在烹饪程序结束时，确定烹饪过程结束；若未接收到烹饪结束的指令，且烹饪程序未结束时，确定烹饪过程未结束。
根据本发明的一个实施例，所述第一预定时长占所述预定周期的40％至60％，所述第二预定时长占所述预定周期的20％至40％，所述第三预定时长占所述预定周期的20％至40％；
所述第一设定值为5℃至10℃，所述第二设定值为6℃至11℃，所述第三设定值为5℃至8℃，所述第四设定值为2℃至5℃。
本发明的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。
附图说明
本发明的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1示出了根据本发明的实施例的微波炉的结构示意图；
图2示出了根据本发明的一个实施例的微波炉的控制方法的示意流程图；
图3示出了根据本发明的实施例的微波炉的控制装置的示意框图；
图4示出了根据本发明的实施例的微波炉腔体温度的曲线示意图；
图5示出了根据本发明的另一个实施例的微波炉的控制方法的示意流程图。
具体实施方式
为了能够更清楚地理解本发明的上述目的、特征和优点，下面结合附图和具体实施方式对本发明进行进一步的详细描述。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是，本发明还可以采用其他不同于在此描述的其他方式来实施，因此，本发明的保护范围并不受下面公开的具体实施例的限制。
图1示出了根据本发明的实施例的微波炉的结构示意图。
如图1所示，根据本发明的实施例的微波炉1，包括：外罩11、搪瓷腔体12、用于对所述搪瓷腔体12进行加热的热风对流发热管13和烧烤发热管14、对所述搪瓷腔体12内的温度进行检测的温度传感器15、磁控管16和散热风扇17。
以下详细说明针对图1中所示的微波炉1的控制方案。
图2示出了根据本发明的一个实施例的微波炉的控制方法的示意流程图。
如图2所示，根据本发明的一个实施例的微波炉的控制方法，包括：
步骤202，通过温度传感器检测搪瓷腔体内的温度；
步骤204，根据所述温度传感器检测到的所述搪瓷腔体内的温度和预 定温度之间的关系，控制热风对流发热管和烧烤发热管的运行和关闭，并控制所述烧烤发热管在运行时以预定周期进行工作及每周期的工作时长。
具体来说，对于具有复合功能(即热风对流功能和烧烤功能)的搪瓷腔体微波炉，通过检测搪瓷腔体内的温度，并根据搪瓷腔体内的温度和预定温度之间的关系控制热风对流发热管和烧烤发热管的运行和关闭，并控制烧烤发热管在运行时以预定周期进行工作及每周期的工作时长，使得能够在确保迅速提升微波炉腔体内的中心温度的前提下，避免腔体内的温度过度上升而导致微波炉的外罩表面温度过高的问题，实现了对具有复合功能的搪瓷腔体微波炉的表面温度的有效控制。
根据本发明的上述实施例的微波炉的控制方法，还可以具有以下技术特征：
根据本发明的一个实施例，控制所述热风对流发热管和所述烧烤发热管的运行和关闭，并控制所述烧烤发热管在运行时以预定的周期进行工作及每周期的工作时长的步骤具体包括：在接收到启动所述微波炉的指令时，控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第一预定时长；当所述搪瓷腔体内的温度达到所述预定温度与第一设定值之差时，控制所述热风对流发热管和所述烧烤发热管关闭。
通过在刚启动微波炉时(即接收到启动微波炉的指令时)，控制热风对流发热管和烧烤发热管运行，并控制烧烤发热管每周期工作第一预定时长，且在搪瓷腔体内的温度达到预定温度与第一设定值之差时，控制热风对流发热管和烧烤发热管关闭，使得在微波炉的炉腔温度将要达到预定温度时，能够及时关闭加热，避免腔体温度不必要的上升，以对微波炉外罩的表面温度进行有效地控制。其中，在控制热风对流发热管和烧烤发热管关闭后，微波炉搪瓷腔体内的温度先上升后下降。
根据本发明的一个实施例，在控制所述热风对流发热管和所述烧烤发热管关闭之后，还包括：当所述搪瓷腔体内的温度低于所述预定温度与第二设定值之差时，控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第二预定时长，其中，所述第二预定时长小于所述第一预定时长。
通过在控制热风对流发热管和烧烤发热管关闭之后，当搪瓷腔体内的温度低于预定温度与第二设定值之差时，控制热风对流发热管和烧烤发热管运行，并控制烧烤发热管每周期工作第二预定时长，且第二预定时长小于第一预定时长，使得在搪瓷腔体内的温度降低后，能够相对缓慢地提升搪瓷腔体内的温度(由于此时的温度已经接近预定温度)，以对微波炉外罩的表面温度进行有效地控制，避免搪瓷腔体内的温度升高过快而导致微波炉外罩温度不易控制的问题。
根据本发明的一个实施例，在控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第二预定时长之后，还包括：若烹饪过程未结束，则
在所述搪瓷腔体内的温度达到所述预定温度与第三设定值之和时，控制所述热风对流发热管和所述烧烤发热管关闭；以及在所述搪瓷腔体内的温度低于所述预定温度与第四设定值之差时，控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第三预定时长。
通过在控制烧烤发热管每周期工作第二预定时长之后，若搪瓷腔体内的温度达到预定温度与第三设定值之和，则控制热风对流发热管和烧烤发热管关闭；若搪瓷腔体内的温度低于预定温度与第四设定值之差时，则控制热风对流发热管和烧烤发热管运行，并控制烧烤发热管每周期工作第三预定时长，使得在烹饪过程未结束时，能够将搪瓷腔体内的温度控制在一定范围内，进而间接将微波炉外罩的温度控制在温度标准要求的范围内，实现了对微波炉外罩温度的有效控制。
其中，若接收到烹饪结束的指令，或在烹饪程序结束时，确定烹饪过程结束；若未接收到烹饪结束的指令，且烹饪程序未结束时，确定烹饪过程未结束。
根据本发明的一个实施例，所述第一预定时长占所述预定周期的40％至60％，所述第二预定时长占所述预定周期的20％至40％，所述第三预定时长占所述预定周期的20％至40％；
所述第一设定值为5℃至10℃，所述第二设定值为6℃至11℃，所述第三设定值为5℃至8℃，所述第四设定值为2℃至5℃。
根据本发明的一个实施例，烧烤发热管在运行时的预定周期为10s至 20s。
图3示出了根据本发明的实施例的微波炉的控制装置的示意框图。
如图3所示，根据本发明的实施例的微波炉的控制装置300，包括：检测单元302和控制单元304。
其中，检测单元302，用于通过温度传感器检测搪瓷腔体内的温度；控制单元304，用于根据检测单元302检测到的搪瓷腔体内的温度和预定温度之间的关系，控制热风对流发热管和烧烤发热管的运行和关闭，并控制所述烧烤发热管在运行时以预定周期进行工作及每周期的工作时长。
具体来说，对于具有复合功能(即热风对流功能和烧烤功能)的搪瓷腔体微波炉，通过检测搪瓷腔体内的温度，并根据搪瓷腔体内的温度和预定温度之间的关系控制热风对流发热管和烧烤发热管的运行和关闭，并控制烧烤发热管在运行时以预定周期进行工作及每周期的工作时长，使得能够在确保迅速提升微波炉腔体内的中心温度的前提下，避免腔体内的温度过度上升而导致微波炉的外罩表面温度过高的问题，实现了对具有复合功能的搪瓷腔体微波炉的表面温度的有效控制。
根据本发明的上述实施例的微波炉的控制装置300，还可以具有以下技术特征：
根据本发明的一个实施例，所述控制单元304具体用于：在接收到启动所述微波炉的指令时，控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第一预定时长，以及在所述检测单元302检测到所述搪瓷腔体内的温度达到所述预定温度与第一设定值之差时，控制所述热风对流发热管和所述烧烤发热管关闭。
通过在刚启动微波炉时(即接收到启动微波炉的指令时)，控制热风对流发热管和烧烤发热管运行，并控制烧烤发热管每周期工作第一预定时长，且在搪瓷腔体内的温度达到预定温度与第一设定值之差时，控制热风对流发热管和烧烤发热管关闭，使得在微波炉的炉腔温度将要达到预定温度时，能够及时关闭加热，避免腔体温度不必要的上升，以对微波炉外罩的表面温度进行有效地控制。其中，在控制热风对流发热管和烧烤发热管关闭后，微波炉搪瓷腔体内的温度先上升后下降。
根据本发明的一个实施例，所述控制单元304在控制所述热风对流发 热管和所述烧烤发热管关闭之后，还用于：在所述检测单元302检测到所述搪瓷腔体内的温度低于所述预定温度与第二设定值之差时，控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第二预定时长，其中，所述第二预定时长小于所述第一预定时长。
通过在控制热风对流发热管和烧烤发热管关闭之后，当搪瓷腔体内的温度低于预定温度与第二设定值之差时，控制热风对流发热管和烧烤发热管运行，并控制烧烤发热管每周期工作第二预定时长，且第二预定时长小于第一预定时长，使得在搪瓷腔体内的温度降低后，能够相对缓慢地提升搪瓷腔体内的温度(由于此时的温度已经接近预定温度)，以对微波炉外罩的表面温度进行有效地控制，避免搪瓷腔体内的温度升高过快而导致微波炉外罩温度不易控制的问题。
根据本发明的一个实施例，所述控制单元304在控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第二预定时长之后，还用于：若烹饪过程未结束，则
在所述检测单元302检测到所述搪瓷腔体内的温度达到所述预定温度与第三设定值之和时，控制所述热风对流发热管和所述烧烤发热管关闭，以及在所述检测单元302检测到所述搪瓷腔体内的温度低于所述预定温度与第四设定值之差时，控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第三预定时长。
通过在控制烧烤发热管每周期工作第二预定时长之后，若搪瓷腔体内的温度达到预定温度与第三设定值之和，则控制热风对流发热管和烧烤发热管关闭；若搪瓷腔体内的温度低于预定温度与第四设定值之差时，则控制热风对流发热管和烧烤发热管运行，并控制烧烤发热管每周期工作第三预定时长，使得在烹饪过程未结束时，能够将搪瓷腔体内的温度控制在一定范围内，进而间接将微波炉外罩的温度控制在温度标准要求的范围内，实现了对微波炉外罩温度的有效控制。
其中，若接收到烹饪结束的指令，或在烹饪程序结束时，确定烹饪过程结束；若未接收到烹饪结束的指令，且烹饪程序未结束时，确定烹饪过程未结束。
根据本发明的一个实施例，所述第一预定时长占所述预定周期的40％ 至60％，所述第二预定时长占所述预定周期的20％至40％，所述第三预定时长占所述预定周期的20％至40％；
所述第一设定值为5℃至10℃，所述第二设定值为6℃至11℃，所述第三设定值为5℃至8℃，所述第四设定值为2℃至5℃。
以下结合图4和图5详细说明本发明的技术方案：
由于热风对流发热管开始工作后，在第一次到达腔体中心设定温度T0(如200℃)之前，为了迅速升温需要较高的输出，这时腔体中心温度上升过快导致微波炉外罩的表面温升过高，进而会超过预定温升。因此，在本发明提出的技术方案中，微波炉在开始工作后第一次温度达到T0之前，即在略低于T0时，热风对流发热管和烧烤发热管同时关闭加热，以有效减少不必要的温度上升，以使微波炉外罩的表面温度的上升得到控制。
当腔体温度达到设定温度T0之后，为了控制腔体温度的最高点和最低点之间的温度范围，以避免出现不必要的温度上升，本发明采用将烧烤发热管的工作周期缩短到10s到20s以内的方案，进而可以把腔体温度的最高点和最低点之间的温度范围控制在平均20℃以内，具体的控制逻辑如图4所示：
阶段1：微波炉启动，热风对流发热管全功率运行，烧烤发热管按照一定的周期运行和关闭，开40～60％周期，关60～40％周期(如周期为15s，则开7秒，关8秒)；将温度传感器检测腔体的温度T与腔体中心设定温度T0对比，当T>T0-△t1时，△t1的范围为(5～10)℃，关闭热风对流发热管和烧烤发热管。此时腔体的温度略上升后开始下降。
阶段2：温度传感器继续检测腔体的温度，将检测到的温度T与腔体中心设定温度T0对比，当T<(T0-△t2)℃时，△t2的范围为(6～11)℃，热风对流发热管全通，烧烤发热管按照一定的周期运行和关闭，开20～40％周期，关80～60％周期(如周期为15S，则开3秒，关12秒)。此时腔体的温度略下降后开始上升。
阶段3：温度传感器继续检测腔体的温度，将检测到的温度T与腔体中心设定温度T0对比，当T>T0+△t3时，△t3的范围为(5～8)℃，热风对流发热管关闭，烧烤发热管关闭。此时腔体的温度略上升后开始下 降。温度传感器继续检测腔体的温度，将检测到的温度T与腔体中心设定温度T0对比，当T<T0-△t4时，△t4的范围为(2～5)℃，热风对流发热管全通，烧烤发热管按照一定的周期运行和关闭，开20～40％周期，关80～60％周期(如周期为15s，则开3秒，关12秒)。此后一直循环阶段3的上述过程，直至烹饪结束。
上述过程如图5所示，根据本发明的另一个实施例的微波炉的控制方法，包括：
步骤502，微波炉启动。
步骤504，控制热风对流发热管全通，烧烤加热管以一定周期工作，每周期开7s、关8s。
步骤506，判断腔体内的温度T是否大于T0-△t1，若是，则执行步骤508；否则，返回步骤504。
步骤508，控制热风对流发热管关，烧烤加热管关。
步骤510，判断腔体内的温度T是否小于T0-△t2，若是，则执行步骤512；否则，返回步骤508。
步骤512，控制热风对流发热管全通，烧烤加热管以一定周期工作，每周期开3s、关12s。
步骤514，判断腔体内的温度T是否大于T0+△t3，若是，则执行步骤516；否则，返回步骤512。
步骤516，控制热风对流发热管关，烧烤加热管关。
步骤518，判断腔体内的温度T是否小于T0-△t4，若是，则返回步骤512；否则，返回步骤516。
在本发明上述实施例的技术方案中，通过热风对流发热管和烧烤发热管的一起使用，并将烧烤发热管的工作周期缩短到10s到20s以内期的控制法能够有效防止微波炉在启动初期温度过度上升的问题，可以有效控制具有复合功能(热风对流功能和烧烤功能)的搪瓷微波炉产品的中心温度及表面温度，使其符合温度标准的要求。
以上结合附图详细说明了本发明的技术方案，本发明提出了一种新的微波炉的控制方案，可以避免腔体内的温度过度上升而导致微波炉的外罩表面温度过高的问题，实现了对具有复合功能的搪瓷腔体微波炉的表面温 度的有效控制。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种微波炉的控制方法，其特征在于，所述微波炉包括搪瓷腔体、用于对所述搪瓷腔体进行加热的热风对流发热管和烧烤发热管，以及对所述搪瓷腔体内的温度进行检测的温度传感器，所述微波炉的控制方法，包括：
    通过所述温度传感器检测所述搪瓷腔体内的温度；
    根据所述温度传感器检测到的所述搪瓷腔体内的温度和预定温度之间的关系，控制所述热风对流发热管和所述烧烤发热管的运行和关闭，并控制所述烧烤发热管在运行时以预定周期进行工作及每周期的工作时长。
  2. 根据权利要求1所述的微波炉的控制方法，其特征在于，控制所述热风对流发热管和所述烧烤发热管的运行和关闭，并控制所述烧烤发热管在运行时以预定的周期进行工作及每周期的工作时长的步骤具体包括：
    在接收到启动所述微波炉的指令时，控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第一预定时长；
    当所述搪瓷腔体内的温度达到所述预定温度与第一设定值之差时，控制所述热风对流发热管和所述烧烤发热管关闭。
  3. 根据权利要求2所述的微波炉的控制方法，其特征在于，在控制所述热风对流发热管和所述烧烤发热管关闭之后，还包括：
    当所述搪瓷腔体内的温度低于所述预定温度与第二设定值之差时，控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第二预定时长，其中，所述第二预定时长小于所述第一预定时长。
  4. 根据权利要求3所述的微波炉的控制方法，其特征在于，在控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第二预定时长之后，还包括：
    若烹饪过程未结束，则
    在所述搪瓷腔体内的温度达到所述预定温度与第三设定值之和时，控制所述热风对流发热管和所述烧烤发热管关闭；以及
    在所述搪瓷腔体内的温度低于所述预定温度与第四设定值之差时，控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第三预定时长。
  5. 根据权利要求4所述的微波炉的控制方法，其特征在于，所述第一预定时长占所述预定周期的40％至60％，所述第二预定时长占所述预定周期的20％至40％，所述第三预定时长占所述预定周期的20％至40％；
    所述第一设定值为5℃至10℃，所述第二设定值为6℃至11℃，所述第三设定值为5℃至8℃，所述第四设定值为2℃至5℃。
  6. 一种微波炉的控制装置，其特征在于，所述微波炉包括搪瓷腔体、用于对所述搪瓷腔体进行加热的热风对流发热管和烧烤发热管，以及对所述搪瓷腔体内的温度进行检测的温度传感器，所述微波炉的控制装置，包括：
    检测单元，用于通过所述温度传感器检测所述搪瓷腔体内的温度；
    控制单元，用于根据所述检测单元检测到的所述搪瓷腔体内的温度和预定温度之间的关系，控制所述热风对流发热管和所述烧烤发热管的运行和关闭，并控制所述烧烤发热管在运行时以预定周期进行工作及每周期的工作时长。
  7. 根据权利要求6所述的微波炉的控制装置，其特征在于，所述控制单元具体用于：
    在接收到启动所述微波炉的指令时，控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第一预定时长，以及
    在所述检测单元检测到所述搪瓷腔体内的温度达到所述预定温度与第一设定值之差时，控制所述热风对流发热管和所述烧烤发热管关闭。
  8. 根据权利要求7所述的微波炉的控制装置，其特征在于，所述控制单元在控制所述热风对流发热管和所述烧烤发热管关闭之后，还用于：
    在所述检测单元检测到所述搪瓷腔体内的温度低于所述预定温度与第二设定值之差时，控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第二预定时长，其中，所述第二预定时长小于所述第一预定时长。
  9. 根据权利要求8所述的微波炉的控制装置，其特征在于，所述控制单元在控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第二预定时长之后，还用于：
    若烹饪过程未结束，则
    在所述检测单元检测到所述搪瓷腔体内的温度达到所述预定温度与第三设定值之和时，控制所述热风对流发热管和所述烧烤发热管关闭，以及
    在所述检测单元检测到所述搪瓷腔体内的温度低于所述预定温度与第四设定值之差时，控制所述热风对流发热管和所述烧烤发热管运行，并控制所述烧烤发热管每周期工作第三预定时长。
  10. 根据权利要求9所述的微波炉的控制装置，其特征在于，所述第一预定时长占所述预定周期的40％至60％，所述第二预定时长占所述预定周期的20％至40％，所述第三预定时长占所述预定周期的20％至40％；
    所述第一设定值为5℃至10℃，所述第二设定值为6℃至11℃，所述第三设定值为5℃至8℃，所述第四设定值为2℃至5℃。
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